lustre/mdt/mdt_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mdt/mdt_handler.c
  37  *
  38  * Lustre Metadata Target (mdt) request handler
  39  *
  40  * Author: Peter Braam <braam@clusterfs.com>
  41  * Author: Andreas Dilger <adilger@clusterfs.com>
  42  * Author: Phil Schwan <phil@clusterfs.com>
  43  * Author: Mike Shaver <shaver@clusterfs.com>
  44  * Author: Nikita Danilov <nikita@clusterfs.com>
  45  * Author: Huang Hua <huanghua@clusterfs.com>
  46  * Author: Yury Umanets <umka@clusterfs.com>
  47  */
  48
  49 #define DEBUG_SUBSYSTEM S_MDS
  50
  51 #include <linux/module.h>
  52 /*
  53  * struct OBD_{ALLOC,FREE}*()
  54  */
  55 #include <obd_support.h>
  56 /* struct ptlrpc_request */
  57 #include <lustre_net.h>
  58 /* struct obd_export */
  59 #include <lustre_export.h>
  60 /* struct obd_device */
  61 #include <obd.h>
  62 /* lu2dt_dev() */
  63 #include <dt_object.h>
  64 #include <lustre_mds.h>
  65 #include <lustre_mdt.h>
  66 #include <lustre_log.h>
  67 #include "mdt_internal.h"
  68 #include <lustre_acl.h>
  69 #include <lustre_param.h>
  70 #include <lustre_quota.h>
  71
  72 mdl_mode_t mdt_mdl_lock_modes[] = {
  73         [LCK_MINMODE] = MDL_MINMODE,
  74         [LCK_EX]      = MDL_EX,
  75         [LCK_PW]      = MDL_PW,
  76         [LCK_PR]      = MDL_PR,
  77         [LCK_CW]      = MDL_CW,
  78         [LCK_CR]      = MDL_CR,
  79         [LCK_NL]      = MDL_NL,
  80         [LCK_GROUP]   = MDL_GROUP
  81 };
  82
  83 ldlm_mode_t mdt_dlm_lock_modes[] = {
  84         [MDL_MINMODE] = LCK_MINMODE,
  85         [MDL_EX]      = LCK_EX,
  86         [MDL_PW]      = LCK_PW,
  87         [MDL_PR]      = LCK_PR,
  88         [MDL_CW]      = LCK_CW,
  89         [MDL_CR]      = LCK_CR,
  90         [MDL_NL]      = LCK_NL,
  91         [MDL_GROUP]   = LCK_GROUP
  92 };
  93
  94 /*
  95  * Initialized in mdt_mod_init().
  96  */
  97 static unsigned long mdt_num_threads;
  98 CFS_MODULE_PARM(mdt_num_threads, "ul", ulong, 0444,
  99                 "number of MDS service threads to start "
 100                 "(deprecated in favor of mds_num_threads)");
 101
 102 static unsigned long mds_num_threads;
 103 CFS_MODULE_PARM(mds_num_threads, "ul", ulong, 0444,
 104                 "number of MDS service threads to start");
 105
 106 static char *mds_num_cpts;
 107 CFS_MODULE_PARM(mds_num_cpts, "c", charp, 0444,
 108                 "CPU partitions MDS threads should run on");
 109
 110 static unsigned long mds_rdpg_num_threads;
 111 CFS_MODULE_PARM(mds_rdpg_num_threads, "ul", ulong, 0444,
 112                 "number of MDS readpage service threads to start");
 113
 114 static char *mds_rdpg_num_cpts;
 115 CFS_MODULE_PARM(mds_rdpg_num_cpts, "c", charp, 0444,
 116                 "CPU partitions MDS readpage threads should run on");
 117
 118 /* NB: these two should be removed along with setattr service in the future */
 119 static unsigned long mds_attr_num_threads;
 120 CFS_MODULE_PARM(mds_attr_num_threads, "ul", ulong, 0444,
 121                 "number of MDS setattr service threads to start");
 122
 123 static char *mds_attr_num_cpts;
 124 CFS_MODULE_PARM(mds_attr_num_cpts, "c", charp, 0444,
 125                 "CPU partitions MDS setattr threads should run on");
 126
 127 /* ptlrpc request handler for MDT. All handlers are
 128  * grouped into several slices - struct mdt_opc_slice,
 129  * and stored in an array - mdt_handlers[].
 130  */
 131 struct mdt_handler {
 132         /* The name of this handler. */
 133         const char *mh_name;
 134         /* Fail id for this handler, checked at the beginning of this handler*/
 135         int         mh_fail_id;
 136         /* Operation code for this handler */
 137         __u32       mh_opc;
 138         /* flags are listed in enum mdt_handler_flags below. */
 139         __u32       mh_flags;
 140         /* The actual handler function to execute. */
 141         int (*mh_act)(struct mdt_thread_info *info);
 142         /* Request format for this request. */
 143         const struct req_format *mh_fmt;
 144 };
 145
 146 enum mdt_handler_flags {
 147         /*
 148          * struct mdt_body is passed in the incoming message, and object
 149          * identified by this fid exists on disk.
 150          *
 151          * "habeo corpus" == "I have a body"
 152          */
 153         HABEO_CORPUS = (1 << 0),
 154         /*
 155          * struct ldlm_request is passed in the incoming message.
 156          *
 157          * "habeo clavis" == "I have a key"
 158          */
 159         HABEO_CLAVIS = (1 << 1),
 160         /*
 161          * this request has fixed reply format, so that reply message can be
 162          * packed by generic code.
 163          *
 164          * "habeo refero" == "I have a reply"
 165          */
 166         HABEO_REFERO = (1 << 2),
 167         /*
 168          * this request will modify something, so check whether the filesystem
 169          * is readonly or not, then return -EROFS to client asap if necessary.
 170          *
 171          * "mutabor" == "I shall modify"
 172          */
 173         MUTABOR      = (1 << 3)
 174 };
 175
 176 struct mdt_opc_slice {
 177         __u32               mos_opc_start;
 178         int                 mos_opc_end;
 179         struct mdt_handler *mos_hs;
 180 };
 181
 182 static struct mdt_opc_slice mdt_regular_handlers[];
 183 static struct mdt_opc_slice mdt_readpage_handlers[];
 184 static struct mdt_opc_slice mdt_xmds_handlers[];
 185 static struct mdt_opc_slice mdt_seq_handlers[];
 186 static struct mdt_opc_slice mdt_fld_handlers[];
 187
 188 static struct mdt_device *mdt_dev(struct lu_device *d);
 189 static int mdt_regular_handle(struct ptlrpc_request *req);
 190 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags);
 191 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
 192                         struct getinfo_fid2path *fp);
 193
 194 static const struct lu_object_operations mdt_obj_ops;
 195
 196 /* Slab for MDT object allocation */
 197 static cfs_mem_cache_t *mdt_object_kmem;
 198
 199 static struct lu_kmem_descr mdt_caches[] = {
 200         {
 201                 .ckd_cache = &mdt_object_kmem,
 202                 .ckd_name  = "mdt_obj",
 203                 .ckd_size  = sizeof(struct mdt_object)
 204         },
 205         {
 206                 .ckd_cache = NULL
 207         }
 208 };
 209
 210 int mdt_get_disposition(struct ldlm_reply *rep, int flag)
 211 {
 212         if (!rep)
 213                 return 0;
 214         return (rep->lock_policy_res1 & flag);
 215 }
 216
 217 void mdt_clear_disposition(struct mdt_thread_info *info,
 218                            struct ldlm_reply *rep, int flag)
 219 {
 220         if (info)
 221                 info->mti_opdata &= ~flag;
 222         if (rep)
 223                 rep->lock_policy_res1 &= ~flag;
 224 }
 225
 226 void mdt_set_disposition(struct mdt_thread_info *info,
 227                          struct ldlm_reply *rep, int flag)
 228 {
 229         if (info)
 230                 info->mti_opdata |= flag;
 231         if (rep)
 232                 rep->lock_policy_res1 |= flag;
 233 }
 234
 235 void mdt_lock_reg_init(struct mdt_lock_handle *lh, ldlm_mode_t lm)
 236 {
 237         lh->mlh_pdo_hash = 0;
 238         lh->mlh_reg_mode = lm;
 239         lh->mlh_type = MDT_REG_LOCK;
 240 }
 241
 242 void mdt_lock_pdo_init(struct mdt_lock_handle *lh, ldlm_mode_t lm,
 243                        const char *name, int namelen)
 244 {
 245         lh->mlh_reg_mode = lm;
 246         lh->mlh_type = MDT_PDO_LOCK;
 247
 248         if (name != NULL && (name[0] != '\0')) {
 249                 LASSERT(namelen > 0);
 250                 lh->mlh_pdo_hash = full_name_hash(name, namelen);
 251         } else {
 252                 LASSERT(namelen == 0);
 253                 lh->mlh_pdo_hash = 0ull;
 254         }
 255 }
 256
 257 static void mdt_lock_pdo_mode(struct mdt_thread_info *info, struct mdt_object *o,
 258                               struct mdt_lock_handle *lh)
 259 {
 260         mdl_mode_t mode;
 261         ENTRY;
 262
 263         /*
 264          * Any dir access needs couple of locks:
 265          *
 266          * 1) on part of dir we gonna take lookup/modify;
 267          *
 268          * 2) on whole dir to protect it from concurrent splitting and/or to
 269          * flush client's cache for readdir().
 270          *
 271          * so, for a given mode and object this routine decides what lock mode
 272          * to use for lock #2:
 273          *
 274          * 1) if caller's gonna lookup in dir then we need to protect dir from
 275          * being splitted only - LCK_CR
 276          *
 277          * 2) if caller's gonna modify dir then we need to protect dir from
 278          * being splitted and to flush cache - LCK_CW
 279          *
 280          * 3) if caller's gonna modify dir and that dir seems ready for
 281          * splitting then we need to protect it from any type of access
 282          * (lookup/modify/split) - LCK_EX --bzzz
 283          */
 284
 285         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
 286         LASSERT(lh->mlh_pdo_mode == LCK_MINMODE);
 287
 288         /*
 289          * Ask underlaying level its opinion about preferable PDO lock mode
 290          * having access type passed as regular lock mode:
 291          *
 292          * - MDL_MINMODE means that lower layer does not want to specify lock
 293          * mode;
 294          *
 295          * - MDL_NL means that no PDO lock should be taken. This is used in some
 296          * cases. Say, for non-splittable directories no need to use PDO locks
 297          * at all.
 298          */
 299         mode = mdo_lock_mode(info->mti_env, mdt_object_child(o),
 300                              mdt_dlm_mode2mdl_mode(lh->mlh_reg_mode));
 301
 302         if (mode != MDL_MINMODE) {
 303                 lh->mlh_pdo_mode = mdt_mdl_mode2dlm_mode(mode);
 304         } else {
 305                 /*
 306                  * Lower layer does not want to specify locking mode. We do it
 307                  * our selves. No special protection is needed, just flush
 308                  * client's cache on modification and allow concurrent
 309                  * mondification.
 310                  */
 311                 switch (lh->mlh_reg_mode) {
 312                 case LCK_EX:
 313                         lh->mlh_pdo_mode = LCK_EX;
 314                         break;
 315                 case LCK_PR:
 316                         lh->mlh_pdo_mode = LCK_CR;
 317                         break;
 318                 case LCK_PW:
 319                         lh->mlh_pdo_mode = LCK_CW;
 320                         break;
 321                 default:
 322                         CERROR("Not expected lock type (0x%x)\n",
 323                                (int)lh->mlh_reg_mode);
 324                         LBUG();
 325                 }
 326         }
 327
 328         LASSERT(lh->mlh_pdo_mode != LCK_MINMODE);
 329         EXIT;
 330 }
 331
 332 static int mdt_getstatus(struct mdt_thread_info *info)
 333 {
 334         struct mdt_device *mdt  = info->mti_mdt;
 335         struct md_device  *next = mdt->mdt_child;
 336         struct mdt_body   *repbody;
 337         int                rc;
 338
 339         ENTRY;
 340
 341         rc = mdt_check_ucred(info);
 342         if (rc)
 343                 RETURN(err_serious(rc));
 344
 345         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK))
 346                 RETURN(err_serious(-ENOMEM));
 347
 348         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 349         rc = next->md_ops->mdo_root_get(info->mti_env, next, &repbody->fid1);
 350         if (rc != 0)
 351                 RETURN(rc);
 352
 353         repbody->valid |= OBD_MD_FLID;
 354
 355         if (mdt->mdt_opts.mo_mds_capa &&
 356             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 357                 struct mdt_object  *root;
 358                 struct lustre_capa *capa;
 359
 360                 root = mdt_object_find(info->mti_env, mdt, &repbody->fid1);
 361                 if (IS_ERR(root))
 362                         RETURN(PTR_ERR(root));
 363
 364                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
 365                 LASSERT(capa);
 366                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 367                 rc = mo_capa_get(info->mti_env, mdt_object_child(root), capa,
 368                                  0);
 369                 mdt_object_put(info->mti_env, root);
 370                 if (rc == 0)
 371                         repbody->valid |= OBD_MD_FLMDSCAPA;
 372         }
 373
 374         RETURN(rc);
 375 }
 376
 377 static int mdt_statfs(struct mdt_thread_info *info)
 378 {
 379         struct ptlrpc_request           *req = mdt_info_req(info);
 380         struct md_device                *next = info->mti_mdt->mdt_child;
 381         struct ptlrpc_service_part      *svcpt;
 382         struct obd_statfs               *osfs;
 383         int                             rc;
 384
 385         ENTRY;
 386
 387         svcpt = info->mti_pill->rc_req->rq_rqbd->rqbd_svcpt;
 388
 389         /* This will trigger a watchdog timeout */
 390         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
 391                          (MDT_SERVICE_WATCHDOG_FACTOR *
 392                           at_get(&svcpt->scp_at_estimate)) + 1);
 393
 394         rc = mdt_check_ucred(info);
 395         if (rc)
 396                 RETURN(err_serious(rc));
 397
 398         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
 399                 RETURN(err_serious(-ENOMEM));
 400
 401         osfs = req_capsule_server_get(info->mti_pill, &RMF_OBD_STATFS);
 402         if (!osfs)
 403                 RETURN(-EPROTO);
 404
 405         /** statfs information are cached in the mdt_device */
 406         if (cfs_time_before_64(info->mti_mdt->mdt_osfs_age,
 407                                cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS))) {
 408                 /** statfs data is too old, get up-to-date one */
 409                 rc = next->md_ops->mdo_statfs(info->mti_env, next, osfs);
 410                 if (rc)
 411                         RETURN(rc);
 412                 cfs_spin_lock(&info->mti_mdt->mdt_osfs_lock);
 413                 info->mti_mdt->mdt_osfs = *osfs;
 414                 info->mti_mdt->mdt_osfs_age = cfs_time_current_64();
 415                 cfs_spin_unlock(&info->mti_mdt->mdt_osfs_lock);
 416         } else {
 417                 /** use cached statfs data */
 418                 cfs_spin_lock(&info->mti_mdt->mdt_osfs_lock);
 419                 *osfs = info->mti_mdt->mdt_osfs;
 420                 cfs_spin_unlock(&info->mti_mdt->mdt_osfs_lock);
 421         }
 422
 423         if (rc == 0)
 424                 mdt_counter_incr(req, LPROC_MDT_STATFS);
 425
 426         RETURN(rc);
 427 }
 428
 429 /**
 430  * Pack SOM attributes into the reply.
 431  * Call under a DLM UPDATE lock.
 432  */
 433 static void mdt_pack_size2body(struct mdt_thread_info *info,
 434                                struct mdt_object *mo)
 435 {
 436         struct mdt_body *b;
 437         struct md_attr *ma = &info->mti_attr;
 438
 439         LASSERT(ma->ma_attr.la_valid & LA_MODE);
 440         b = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 441
 442         /* Check if Size-on-MDS is supported, if this is a regular file,
 443          * if SOM is enabled on the object and if SOM cache exists and valid.
 444          * Otherwise do not pack Size-on-MDS attributes to the reply. */
 445         if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
 446             !S_ISREG(ma->ma_attr.la_mode) ||
 447             !mdt_object_is_som_enabled(mo) ||
 448             !(ma->ma_valid & MA_SOM))
 449                 return;
 450
 451         b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
 452         b->size = ma->ma_som->msd_size;
 453         b->blocks = ma->ma_som->msd_blocks;
 454 }
 455
 456 void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
 457                         const struct lu_attr *attr, const struct lu_fid *fid)
 458 {
 459         struct md_attr *ma = &info->mti_attr;
 460
 461         LASSERT(ma->ma_valid & MA_INODE);
 462
 463         b->atime      = attr->la_atime;
 464         b->mtime      = attr->la_mtime;
 465         b->ctime      = attr->la_ctime;
 466         b->mode       = attr->la_mode;
 467         b->size       = attr->la_size;
 468         b->blocks     = attr->la_blocks;
 469         b->uid        = attr->la_uid;
 470         b->gid        = attr->la_gid;
 471         b->flags      = attr->la_flags;
 472         b->nlink      = attr->la_nlink;
 473         b->rdev       = attr->la_rdev;
 474
 475         /*XXX should pack the reply body according to lu_valid*/
 476         b->valid |= OBD_MD_FLCTIME | OBD_MD_FLUID   |
 477                     OBD_MD_FLGID   | OBD_MD_FLTYPE  |
 478                     OBD_MD_FLMODE  | OBD_MD_FLNLINK | OBD_MD_FLFLAGS |
 479                     OBD_MD_FLATIME | OBD_MD_FLMTIME ;
 480
 481         if (!S_ISREG(attr->la_mode)) {
 482                 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLRDEV;
 483         } else if (ma->ma_need & MA_LOV && !(ma->ma_valid & MA_LOV)) {
 484                 /* means no objects are allocated on osts. */
 485                 LASSERT(!(ma->ma_valid & MA_LOV));
 486                 /* just ignore blocks occupied by extend attributes on MDS */
 487                 b->blocks = 0;
 488                 /* if no object is allocated on osts, the size on mds is valid. b=22272 */
 489                 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
 490         }
 491
 492         if (fid) {
 493                 b->fid1 = *fid;
 494                 b->valid |= OBD_MD_FLID;
 495
 496                 /* FIXME: these should be fixed when new igif ready.*/
 497                 b->ino  =  fid_oid(fid);       /* 1.6 compatibility */
 498                 b->generation = fid_ver(fid);  /* 1.6 compatibility */
 499                 b->valid |= OBD_MD_FLGENER;    /* 1.6 compatibility */
 500
 501                 CDEBUG(D_INODE, DFID": nlink=%d, mode=%o, size="LPU64"\n",
 502                                 PFID(fid), b->nlink, b->mode, b->size);
 503         }
 504
 505         if (info)
 506                 mdt_body_reverse_idmap(info, b);
 507
 508         if (b->valid & OBD_MD_FLSIZE)
 509                 CDEBUG(D_VFSTRACE, DFID": returning size %llu\n",
 510                        PFID(fid), (unsigned long long)b->size);
 511 }
 512
 513 static inline int mdt_body_has_lov(const struct lu_attr *la,
 514                                    const struct mdt_body *body)
 515 {
 516         return ((S_ISREG(la->la_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
 517                 (S_ISDIR(la->la_mode) && (body->valid & OBD_MD_FLDIREA )) );
 518 }
 519
 520 void mdt_client_compatibility(struct mdt_thread_info *info)
 521 {
 522         struct mdt_body       *body;
 523         struct ptlrpc_request *req = mdt_info_req(info);
 524         struct obd_export     *exp = req->rq_export;
 525         struct md_attr        *ma = &info->mti_attr;
 526         struct lu_attr        *la = &ma->ma_attr;
 527         ENTRY;
 528
 529         if (exp->exp_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 530                 /* the client can deal with 16-bit lmm_stripe_count */
 531                 RETURN_EXIT;
 532
 533         body = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 534
 535         if (!mdt_body_has_lov(la, body))
 536                 RETURN_EXIT;
 537
 538         /* now we have a reply with a lov for a client not compatible with the
 539          * layout lock so we have to clean the layout generation number */
 540         if (S_ISREG(la->la_mode))
 541                 ma->ma_lmm->lmm_layout_gen = 0;
 542         EXIT;
 543 }
 544
 545 static int mdt_big_lmm_get(const struct lu_env *env, struct mdt_object *o,
 546                            struct md_attr *ma)
 547 {
 548         struct mdt_thread_info *info;
 549         int rc;
 550         ENTRY;
 551
 552         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
 553         LASSERT(info != NULL);
 554         LASSERT(ma->ma_lmm_size > 0);
 555         LASSERT(info->mti_big_lmm_used == 0);
 556         rc = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL,
 557                           XATTR_NAME_LOV);
 558         if (rc < 0)
 559                 RETURN(rc);
 560
 561         /* big_lmm may need to be grown */
 562         if (info->mti_big_lmmsize < rc) {
 563                 int size = size_roundup_power2(rc);
 564
 565                 if (info->mti_big_lmmsize > 0) {
 566                         /* free old buffer */
 567                         LASSERT(info->mti_big_lmm);
 568                         OBD_FREE_LARGE(info->mti_big_lmm,
 569                                        info->mti_big_lmmsize);
 570                         info->mti_big_lmm = NULL;
 571                         info->mti_big_lmmsize = 0;
 572                 }
 573
 574                 OBD_ALLOC_LARGE(info->mti_big_lmm, size);
 575                 if (info->mti_big_lmm == NULL)
 576                         RETURN(-ENOMEM);
 577                 info->mti_big_lmmsize = size;
 578         }
 579         LASSERT(info->mti_big_lmmsize >= rc);
 580
 581         info->mti_buf.lb_buf = info->mti_big_lmm;
 582         info->mti_buf.lb_len = info->mti_big_lmmsize;
 583         rc = mo_xattr_get(env, mdt_object_child(o), &info->mti_buf,
 584                           XATTR_NAME_LOV);
 585         if (rc < 0)
 586                 RETURN(rc);
 587
 588         info->mti_big_lmm_used = 1;
 589         ma->ma_valid |= MA_LOV;
 590         ma->ma_lmm = info->mti_big_lmm;
 591         ma->ma_lmm_size = rc;
 592
 593         /* update mdt_max_mdsize so all clients will be aware about that */
 594         if (info->mti_mdt->mdt_max_mdsize < rc)
 595                 info->mti_mdt->mdt_max_mdsize = rc;
 596
 597         RETURN(0);
 598 }
 599
 600 int mdt_attr_get_lov(struct mdt_thread_info *info,
 601                      struct mdt_object *o, struct md_attr *ma)
 602 {
 603         struct md_object *next = mdt_object_child(o);
 604         struct lu_buf    *buf = &info->mti_buf;
 605         int rc;
 606
 607         buf->lb_buf = ma->ma_lmm;
 608         buf->lb_len = ma->ma_lmm_size;
 609         rc = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_LOV);
 610         if (rc > 0) {
 611                 ma->ma_lmm_size = rc;
 612                 ma->ma_valid |= MA_LOV;
 613                 rc = 0;
 614         } else if (rc == -ENODATA) {
 615                 /* no LOV EA */
 616                 rc = 0;
 617         } else if (rc == -ERANGE) {
 618                 rc = mdt_big_lmm_get(info->mti_env, o, ma);
 619         }
 620
 621         return rc;
 622 }
 623
 624 int mdt_attr_get_complex(struct mdt_thread_info *info,
 625                          struct mdt_object *o, struct md_attr *ma)
 626 {
 627         const struct lu_env *env = info->mti_env;
 628         struct md_object    *next = mdt_object_child(o);
 629         struct lu_buf       *buf = &info->mti_buf;
 630         u32                  mode = lu_object_attr(&next->mo_lu);
 631         int                  need = ma->ma_need;
 632         int                  rc = 0, rc2;
 633         ENTRY;
 634
 635         /* do we really need PFID */
 636         LASSERT((ma->ma_need & MA_PFID) == 0);
 637
 638         ma->ma_valid = 0;
 639
 640         if (need & MA_INODE) {
 641                 ma->ma_need = MA_INODE;
 642                 rc = mo_attr_get(env, next, ma);
 643                 if (rc)
 644                         GOTO(out, rc);
 645                 ma->ma_valid |= MA_INODE;
 646         }
 647
 648         if (need & MA_LOV && (S_ISREG(mode) || S_ISDIR(mode))) {
 649                 rc = mdt_attr_get_lov(info, o, ma);
 650                 if (rc)
 651                         GOTO(out, rc);
 652         }
 653
 654         if (need & MA_LMV && S_ISDIR(mode)) {
 655                 buf->lb_buf = ma->ma_lmv;
 656                 buf->lb_len = ma->ma_lmv_size;
 657                 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_LMV);
 658                 if (rc2 > 0) {
 659                         ma->ma_lmv_size = rc2;
 660                         ma->ma_valid |= MA_LMV;
 661                 } else if (rc2 == -ENODATA) {
 662                         /* no LMV EA */
 663                         ma->ma_lmv_size = 0;
 664                 } else
 665                         GOTO(out, rc = rc2);
 666         }
 667
 668
 669         if (rc == 0 && S_ISREG(mode) && (need & (MA_HSM | MA_SOM))) {
 670                 struct lustre_mdt_attrs *lma;
 671
 672                 lma = (struct lustre_mdt_attrs *)info->mti_xattr_buf;
 673                 CLASSERT(sizeof(*lma) <= sizeof(info->mti_xattr_buf));
 674
 675                 buf->lb_buf = lma;
 676                 buf->lb_len = sizeof(info->mti_xattr_buf);
 677                 rc = mo_xattr_get(env, next, buf, XATTR_NAME_LMA);
 678                 if (rc > 0) {
 679                         lustre_lma_swab(lma);
 680                         /* Swab and copy LMA */
 681                         if (need & MA_HSM) {
 682                                 if (lma->lma_compat & LMAC_HSM)
 683                                         ma->ma_hsm.mh_flags =
 684                                                 lma->lma_flags & HSM_FLAGS_MASK;
 685                                 else
 686                                         ma->ma_hsm.mh_flags = 0;
 687                                 ma->ma_valid |= MA_HSM;
 688                         }
 689                         /* Copy SOM */
 690                         if (need & MA_SOM && lma->lma_compat & LMAC_SOM) {
 691                                 LASSERT(ma->ma_som != NULL);
 692                                 ma->ma_som->msd_ioepoch = lma->lma_ioepoch;
 693                                 ma->ma_som->msd_size    = lma->lma_som_size;
 694                                 ma->ma_som->msd_blocks  = lma->lma_som_blocks;
 695                                 ma->ma_som->msd_mountid = lma->lma_som_mountid;
 696                                 ma->ma_valid |= MA_SOM;
 697                         }
 698                         rc = 0;
 699                 } else if (rc == -ENODATA) {
 700                         rc = 0;
 701                 }
 702         }
 703
 704 #ifdef CONFIG_FS_POSIX_ACL
 705         if (need & MA_ACL_DEF && S_ISDIR(mode)) {
 706                 buf->lb_buf = ma->ma_acl;
 707                 buf->lb_len = ma->ma_acl_size;
 708                 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_DEFAULT);
 709                 if (rc2 > 0) {
 710                         ma->ma_acl_size = rc2;
 711                         ma->ma_valid |= MA_ACL_DEF;
 712                 } else if (rc2 == -ENODATA) {
 713                         /* no ACLs */
 714                         ma->ma_acl_size = 0;
 715                 } else
 716                         GOTO(out, rc = rc2);
 717         }
 718 #endif
 719 out:
 720         ma->ma_need = need;
 721         CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64" ma_lmm=%p\n",
 722                rc, ma->ma_valid, ma->ma_lmm);
 723         RETURN(rc);
 724 }
 725
 726 static int mdt_getattr_internal(struct mdt_thread_info *info,
 727                                 struct mdt_object *o, int ma_need)
 728 {
 729         struct md_object        *next = mdt_object_child(o);
 730         const struct mdt_body   *reqbody = info->mti_body;
 731         struct ptlrpc_request   *req = mdt_info_req(info);
 732         struct md_attr          *ma = &info->mti_attr;
 733         struct lu_attr          *la = &ma->ma_attr;
 734         struct req_capsule      *pill = info->mti_pill;
 735         const struct lu_env     *env = info->mti_env;
 736         struct mdt_body         *repbody;
 737         struct lu_buf           *buffer = &info->mti_buf;
 738         int                     rc;
 739         int                     is_root;
 740         ENTRY;
 741
 742         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK))
 743                 RETURN(err_serious(-ENOMEM));
 744
 745         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 746
 747         ma->ma_valid = 0;
 748
 749         rc = mdt_object_exists(o);
 750         if (rc < 0) {
 751                 /* This object is located on remote node.*/
 752                 repbody->fid1 = *mdt_object_fid(o);
 753                 repbody->valid = OBD_MD_FLID | OBD_MD_MDS;
 754                 GOTO(out, rc = 0);
 755         }
 756
 757         buffer->lb_len = reqbody->eadatasize;
 758         if (buffer->lb_len > 0)
 759                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_MDT_MD);
 760         else
 761                 buffer->lb_buf = NULL;
 762
 763         /* If it is dir object and client require MEA, then we got MEA */
 764         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 765             reqbody->valid & OBD_MD_MEA) {
 766                 /* Assumption: MDT_MD size is enough for lmv size. */
 767                 ma->ma_lmv = buffer->lb_buf;
 768                 ma->ma_lmv_size = buffer->lb_len;
 769                 ma->ma_need = MA_LMV | MA_INODE;
 770         } else {
 771                 ma->ma_lmm = buffer->lb_buf;
 772                 ma->ma_lmm_size = buffer->lb_len;
 773                 ma->ma_need = MA_LOV | MA_INODE;
 774         }
 775
 776         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 777             reqbody->valid & OBD_MD_FLDIREA  &&
 778             lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR) {
 779                 /* get default stripe info for this dir. */
 780                 ma->ma_need |= MA_LOV_DEF;
 781         }
 782         ma->ma_need |= ma_need;
 783         if (ma->ma_need & MA_SOM)
 784                 ma->ma_som = &info->mti_u.som.data;
 785
 786         rc = mdt_attr_get_complex(info, o, ma);
 787         if (unlikely(rc)) {
 788                 CERROR("getattr error for "DFID": %d\n",
 789                         PFID(mdt_object_fid(o)), rc);
 790                 RETURN(rc);
 791         }
 792
 793         is_root = lu_fid_eq(mdt_object_fid(o), &info->mti_mdt->mdt_md_root_fid);
 794
 795         /* the Lustre protocol supposes to return default striping
 796          * on the user-visible root if explicitly requested */
 797         if ((ma->ma_valid & MA_LOV) == 0 && S_ISDIR(la->la_mode) &&
 798             (ma->ma_need & MA_LOV_DEF && is_root) && (ma->ma_need & MA_LOV)) {
 799                 struct lu_fid      rootfid;
 800                 struct mdt_object *root;
 801                 struct mdt_device *mdt = info->mti_mdt;
 802
 803                 rc = dt_root_get(env, mdt->mdt_bottom, &rootfid);
 804                 if (rc)
 805                         RETURN(rc);
 806                 root = mdt_object_find(env, mdt, &rootfid);
 807                 if (IS_ERR(root))
 808                         RETURN(PTR_ERR(root));
 809                 rc = mdt_attr_get_lov(info, root, ma);
 810                 mdt_object_put(info->mti_env, root);
 811                 if (unlikely(rc)) {
 812                         CERROR("getattr error for "DFID": %d\n",
 813                                         PFID(mdt_object_fid(o)), rc);
 814                         RETURN(rc);
 815                 }
 816         }
 817
 818         if (likely(ma->ma_valid & MA_INODE))
 819                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
 820         else
 821                 RETURN(-EFAULT);
 822
 823         if (mdt_body_has_lov(la, reqbody)) {
 824                 if (ma->ma_valid & MA_LOV) {
 825                         LASSERT(ma->ma_lmm_size);
 826                         mdt_dump_lmm(D_INFO, ma->ma_lmm);
 827                         repbody->eadatasize = ma->ma_lmm_size;
 828                         if (S_ISDIR(la->la_mode))
 829                                 repbody->valid |= OBD_MD_FLDIREA;
 830                         else
 831                                 repbody->valid |= OBD_MD_FLEASIZE;
 832                 }
 833                 if (ma->ma_valid & MA_LMV) {
 834                         LASSERT(S_ISDIR(la->la_mode));
 835                         repbody->eadatasize = ma->ma_lmv_size;
 836                         repbody->valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
 837                 }
 838         } else if (S_ISLNK(la->la_mode) &&
 839                    reqbody->valid & OBD_MD_LINKNAME) {
 840                 buffer->lb_buf = ma->ma_lmm;
 841                 /* eadatasize from client includes NULL-terminator, so
 842                  * there is no need to read it */
 843                 buffer->lb_len = reqbody->eadatasize - 1;
 844                 rc = mo_readlink(env, next, buffer);
 845                 if (unlikely(rc <= 0)) {
 846                         CERROR("readlink failed: %d\n", rc);
 847                         rc = -EFAULT;
 848                 } else {
 849                         int print_limit = min_t(int, CFS_PAGE_SIZE - 128, rc);
 850
 851                         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
 852                                 rc -= 2;
 853                         repbody->valid |= OBD_MD_LINKNAME;
 854                         /* we need to report back size with NULL-terminator
 855                          * because client expects that */
 856                         repbody->eadatasize = rc + 1;
 857                         if (repbody->eadatasize != reqbody->eadatasize)
 858                                 CERROR("Read shorter symlink %d, expected %d\n",
 859                                        rc, reqbody->eadatasize - 1);
 860                         /* NULL terminate */
 861                         ((char *)ma->ma_lmm)[rc] = 0;
 862
 863                         /* If the total CDEBUG() size is larger than a page, it
 864                          * will print a warning to the console, avoid this by
 865                          * printing just the last part of the symlink. */
 866                         CDEBUG(D_INODE, "symlink dest %s%.*s, len = %d\n",
 867                                print_limit < rc ? "..." : "", print_limit,
 868                                (char *)ma->ma_lmm + rc - print_limit, rc);
 869                         rc = 0;
 870                 }
 871         }
 872
 873         if (reqbody->valid & OBD_MD_FLMODEASIZE) {
 874                 repbody->max_cookiesize = 0;
 875                 repbody->max_mdsize = info->mti_mdt->mdt_max_mdsize;
 876                 repbody->valid |= OBD_MD_FLMODEASIZE;
 877                 CDEBUG(D_INODE, "I am going to change the MAX_MD_SIZE & "
 878                        "MAX_COOKIE to : %d:%d\n", repbody->max_mdsize,
 879                        repbody->max_cookiesize);
 880         }
 881
 882         if (exp_connect_rmtclient(info->mti_exp) &&
 883             reqbody->valid & OBD_MD_FLRMTPERM) {
 884                 void *buf = req_capsule_server_get(pill, &RMF_ACL);
 885
 886                 /* mdt_getattr_lock only */
 887                 rc = mdt_pack_remote_perm(info, o, buf);
 888                 if (rc) {
 889                         repbody->valid &= ~OBD_MD_FLRMTPERM;
 890                         repbody->aclsize = 0;
 891                         RETURN(rc);
 892                 } else {
 893                         repbody->valid |= OBD_MD_FLRMTPERM;
 894                         repbody->aclsize = sizeof(struct mdt_remote_perm);
 895                 }
 896         }
 897 #ifdef CONFIG_FS_POSIX_ACL
 898         else if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
 899                  (reqbody->valid & OBD_MD_FLACL)) {
 900                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_ACL);
 901                 buffer->lb_len = req_capsule_get_size(pill,
 902                                                       &RMF_ACL, RCL_SERVER);
 903                 if (buffer->lb_len > 0) {
 904                         rc = mo_xattr_get(env, next, buffer,
 905                                           XATTR_NAME_ACL_ACCESS);
 906                         if (rc < 0) {
 907                                 if (rc == -ENODATA) {
 908                                         repbody->aclsize = 0;
 909                                         repbody->valid |= OBD_MD_FLACL;
 910                                         rc = 0;
 911                                 } else if (rc == -EOPNOTSUPP) {
 912                                         rc = 0;
 913                                 } else {
 914                                         CERROR("got acl size: %d\n", rc);
 915                                 }
 916                         } else {
 917                                 repbody->aclsize = rc;
 918                                 repbody->valid |= OBD_MD_FLACL;
 919                                 rc = 0;
 920                         }
 921                 }
 922         }
 923 #endif
 924
 925         if (reqbody->valid & OBD_MD_FLMDSCAPA &&
 926             info->mti_mdt->mdt_opts.mo_mds_capa &&
 927             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 928                 struct lustre_capa *capa;
 929
 930                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 931                 LASSERT(capa);
 932                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 933                 rc = mo_capa_get(env, next, capa, 0);
 934                 if (rc)
 935                         RETURN(rc);
 936                 repbody->valid |= OBD_MD_FLMDSCAPA;
 937         }
 938
 939 out:
 940         if (rc == 0)
 941                 mdt_counter_incr(req, LPROC_MDT_GETATTR);
 942
 943         RETURN(rc);
 944 }
 945
 946 static int mdt_renew_capa(struct mdt_thread_info *info)
 947 {
 948         struct mdt_object  *obj = info->mti_object;
 949         struct mdt_body    *body;
 950         struct lustre_capa *capa, *c;
 951         int rc;
 952         ENTRY;
 953
 954         /* if object doesn't exist, or server has disabled capability,
 955          * return directly, client will find body->valid OBD_MD_FLOSSCAPA
 956          * flag not set.
 957          */
 958         if (!obj || !info->mti_mdt->mdt_opts.mo_oss_capa ||
 959             !(info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA))
 960                 RETURN(0);
 961
 962         body = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 963         LASSERT(body != NULL);
 964
 965         c = req_capsule_client_get(info->mti_pill, &RMF_CAPA1);
 966         LASSERT(c);
 967
 968         capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
 969         LASSERT(capa);
 970
 971         *capa = *c;
 972         rc = mo_capa_get(info->mti_env, mdt_object_child(obj), capa, 1);
 973         if (rc == 0)
 974                 body->valid |= OBD_MD_FLOSSCAPA;
 975         RETURN(rc);
 976 }
 977
 978 static int mdt_getattr(struct mdt_thread_info *info)
 979 {
 980         struct mdt_object       *obj = info->mti_object;
 981         struct req_capsule      *pill = info->mti_pill;
 982         struct mdt_body         *reqbody;
 983         struct mdt_body         *repbody;
 984         mode_t                   mode;
 985         int rc, rc2;
 986         ENTRY;
 987
 988         reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
 989         LASSERT(reqbody);
 990
 991         if (reqbody->valid & OBD_MD_FLOSSCAPA) {
 992                 rc = req_capsule_server_pack(pill);
 993                 if (unlikely(rc))
 994                         RETURN(err_serious(rc));
 995                 rc = mdt_renew_capa(info);
 996                 GOTO(out_shrink, rc);
 997         }
 998
 999         LASSERT(obj != NULL);
1000         LASSERT(lu_object_assert_exists(&obj->mot_obj.mo_lu));
1001
1002         mode = lu_object_attr(&obj->mot_obj.mo_lu);
1003
1004         /* old clients may not report needed easize, use max value then */
1005         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
1006                              reqbody->eadatasize == 0 ?
1007                              info->mti_mdt->mdt_max_mdsize :
1008                              reqbody->eadatasize);
1009
1010         rc = req_capsule_server_pack(pill);
1011         if (unlikely(rc != 0))
1012                 RETURN(err_serious(rc));
1013
1014         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1015         LASSERT(repbody != NULL);
1016         repbody->eadatasize = 0;
1017         repbody->aclsize = 0;
1018
1019         if (reqbody->valid & OBD_MD_FLRMTPERM)
1020                 rc = mdt_init_ucred(info, reqbody);
1021         else
1022                 rc = mdt_check_ucred(info);
1023         if (unlikely(rc))
1024                 GOTO(out_shrink, rc);
1025
1026         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
1027         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
1028
1029         /*
1030          * Don't check capability at all, because rename might getattr for
1031          * remote obj, and at that time no capability is available.
1032          */
1033         mdt_set_capainfo(info, 1, &reqbody->fid1, BYPASS_CAPA);
1034         rc = mdt_getattr_internal(info, obj, 0);
1035         if (reqbody->valid & OBD_MD_FLRMTPERM)
1036                 mdt_exit_ucred(info);
1037         EXIT;
1038 out_shrink:
1039         mdt_client_compatibility(info);
1040         rc2 = mdt_fix_reply(info);
1041         if (rc == 0)
1042                 rc = rc2;
1043         return rc;
1044 }
1045
1046 static int mdt_is_subdir(struct mdt_thread_info *info)
1047 {
1048         struct mdt_object     *o = info->mti_object;
1049         struct req_capsule    *pill = info->mti_pill;
1050         const struct mdt_body *body = info->mti_body;
1051         struct mdt_body       *repbody;
1052         int                    rc;
1053         ENTRY;
1054
1055         LASSERT(o != NULL);
1056
1057         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1058
1059         /*
1060          * We save last checked parent fid to @repbody->fid1 for remote
1061          * directory case.
1062          */
1063         LASSERT(fid_is_sane(&body->fid2));
1064         LASSERT(mdt_object_exists(o) > 0);
1065         rc = mdo_is_subdir(info->mti_env, mdt_object_child(o),
1066                            &body->fid2, &repbody->fid1);
1067         if (rc == 0 || rc == -EREMOTE)
1068                 repbody->valid |= OBD_MD_FLID;
1069
1070         RETURN(rc);
1071 }
1072
1073 static int mdt_raw_lookup(struct mdt_thread_info *info,
1074                           struct mdt_object *parent,
1075                           const struct lu_name *lname,
1076                           struct ldlm_reply *ldlm_rep)
1077 {
1078         struct md_object *next = mdt_object_child(info->mti_object);
1079         const struct mdt_body *reqbody = info->mti_body;
1080         struct lu_fid *child_fid = &info->mti_tmp_fid1;
1081         struct mdt_body *repbody;
1082         int rc;
1083         ENTRY;
1084
1085         if (reqbody->valid != OBD_MD_FLID)
1086                 RETURN(0);
1087
1088         LASSERT(!info->mti_cross_ref);
1089
1090         /* Only got the fid of this obj by name */
1091         fid_zero(child_fid);
1092         rc = mdo_lookup(info->mti_env, next, lname, child_fid,
1093                         &info->mti_spec);
1094 #if 0
1095         /* XXX is raw_lookup possible as intent operation? */
1096         if (rc != 0) {
1097                 if (rc == -ENOENT)
1098                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
1099                 RETURN(rc);
1100         } else
1101                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1102
1103         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1104 #endif
1105         if (rc == 0) {
1106                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1107                 repbody->fid1 = *child_fid;
1108                 repbody->valid = OBD_MD_FLID;
1109         }
1110         RETURN(1);
1111 }
1112
1113 /*
1114  * UPDATE lock should be taken against parent, and be release before exit;
1115  * child_bits lock should be taken against child, and be returned back:
1116  *            (1)normal request should release the child lock;
1117  *            (2)intent request will grant the lock to client.
1118  */
1119 static int mdt_getattr_name_lock(struct mdt_thread_info *info,
1120                                  struct mdt_lock_handle *lhc,
1121                                  __u64 child_bits,
1122                                  struct ldlm_reply *ldlm_rep)
1123 {
1124         struct ptlrpc_request  *req       = mdt_info_req(info);
1125         struct mdt_body        *reqbody   = NULL;
1126         struct mdt_object      *parent    = info->mti_object;
1127         struct mdt_object      *child;
1128         struct md_object       *next      = mdt_object_child(parent);
1129         struct lu_fid          *child_fid = &info->mti_tmp_fid1;
1130         struct lu_name         *lname     = NULL;
1131         const char             *name      = NULL;
1132         int                     namelen   = 0;
1133         struct mdt_lock_handle *lhp       = NULL;
1134         struct ldlm_lock       *lock;
1135         struct ldlm_res_id     *res_id;
1136         int                     is_resent;
1137         int                     ma_need = 0;
1138         int                     rc;
1139
1140         ENTRY;
1141
1142         is_resent = lustre_handle_is_used(&lhc->mlh_reg_lh);
1143         LASSERT(ergo(is_resent,
1144                      lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT));
1145
1146         LASSERT(parent != NULL);
1147         name = req_capsule_client_get(info->mti_pill, &RMF_NAME);
1148         if (name == NULL)
1149                 RETURN(err_serious(-EFAULT));
1150
1151         namelen = req_capsule_get_size(info->mti_pill, &RMF_NAME,
1152                                        RCL_CLIENT) - 1;
1153         if (!info->mti_cross_ref) {
1154                 /*
1155                  * XXX: Check for "namelen == 0" is for getattr by fid
1156                  * (OBD_CONNECT_ATTRFID), otherwise do not allow empty name,
1157                  * that is the name must contain at least one character and
1158                  * the terminating '\0'
1159                  */
1160                 if (namelen == 0) {
1161                         reqbody = req_capsule_client_get(info->mti_pill,
1162                                                          &RMF_MDT_BODY);
1163                         if (unlikely(reqbody == NULL))
1164                                 RETURN(err_serious(-EFAULT));
1165
1166                         if (unlikely(!fid_is_sane(&reqbody->fid2)))
1167                                 RETURN(err_serious(-EINVAL));
1168
1169                         name = NULL;
1170                         CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", "
1171                                "ldlm_rep = %p\n",
1172                                PFID(mdt_object_fid(parent)),
1173                                PFID(&reqbody->fid2), ldlm_rep);
1174                 } else {
1175                         lname = mdt_name(info->mti_env, (char *)name, namelen);
1176                         CDEBUG(D_INODE, "getattr with lock for "DFID"/%s, "
1177                                "ldlm_rep = %p\n", PFID(mdt_object_fid(parent)),
1178                                name, ldlm_rep);
1179                 }
1180         }
1181         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_EXECD);
1182
1183         rc = mdt_object_exists(parent);
1184         if (unlikely(rc == 0)) {
1185                 LU_OBJECT_DEBUG(D_INODE, info->mti_env,
1186                                 &parent->mot_obj.mo_lu,
1187                                 "Parent doesn't exist!\n");
1188                 RETURN(-ESTALE);
1189         } else if (!info->mti_cross_ref) {
1190                 LASSERTF(rc > 0, "Parent "DFID" is on remote server\n",
1191                          PFID(mdt_object_fid(parent)));
1192         }
1193         if (lname) {
1194                 rc = mdt_raw_lookup(info, parent, lname, ldlm_rep);
1195                 if (rc != 0) {
1196                         if (rc > 0)
1197                                 rc = 0;
1198                         RETURN(rc);
1199                 }
1200         }
1201
1202         if (info->mti_cross_ref) {
1203                 /* Only getattr on the child. Parent is on another node. */
1204                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1205                 child = parent;
1206                 CDEBUG(D_INODE, "partial getattr_name child_fid = "DFID", "
1207                        "ldlm_rep=%p\n", PFID(mdt_object_fid(child)), ldlm_rep);
1208
1209                 if (is_resent) {
1210                         /* Do not take lock for resent case. */
1211                         lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1212                         LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
1213                                  lhc->mlh_reg_lh.cookie);
1214                         LASSERT(fid_res_name_eq(mdt_object_fid(child),
1215                                                 &lock->l_resource->lr_name));
1216                         LDLM_LOCK_PUT(lock);
1217                         rc = 0;
1218                 } else {
1219                         mdt_lock_handle_init(lhc);
1220                         mdt_lock_reg_init(lhc, LCK_PR);
1221
1222                         /*
1223                          * Object's name is on another MDS, no lookup lock is
1224                          * needed here but update is.
1225                          */
1226                         child_bits &= ~MDS_INODELOCK_LOOKUP;
1227                         child_bits |= MDS_INODELOCK_UPDATE;
1228
1229                         rc = mdt_object_lock(info, child, lhc, child_bits,
1230                                              MDT_LOCAL_LOCK);
1231                 }
1232                 if (rc == 0) {
1233                         /* Finally, we can get attr for child. */
1234                         mdt_set_capainfo(info, 0, mdt_object_fid(child),
1235                                          BYPASS_CAPA);
1236                         rc = mdt_getattr_internal(info, child, 0);
1237                         if (unlikely(rc != 0))
1238                                 mdt_object_unlock(info, child, lhc, 1);
1239                 }
1240                 RETURN(rc);
1241         }
1242
1243         if (lname) {
1244                 /* step 1: lock parent only if parent is a directory */
1245                 if (S_ISDIR(lu_object_attr(&parent->mot_obj.mo_lu))) {
1246                         lhp = &info->mti_lh[MDT_LH_PARENT];
1247                         mdt_lock_pdo_init(lhp, LCK_PR, name, namelen);
1248                         rc = mdt_object_lock(info, parent, lhp,
1249                                              MDS_INODELOCK_UPDATE,
1250                                              MDT_LOCAL_LOCK);
1251                         if (unlikely(rc != 0))
1252                                 RETURN(rc);
1253                 }
1254
1255                 /* step 2: lookup child's fid by name */
1256                 fid_zero(child_fid);
1257                 rc = mdo_lookup(info->mti_env, next, lname, child_fid,
1258                                 &info->mti_spec);
1259
1260                 if (rc != 0) {
1261                         if (rc == -ENOENT)
1262                                 mdt_set_disposition(info, ldlm_rep,
1263                                                     DISP_LOOKUP_NEG);
1264                         GOTO(out_parent, rc);
1265                 } else
1266                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1267         } else {
1268                 *child_fid = reqbody->fid2;
1269                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1270         }
1271
1272         /*
1273          *step 3: find the child object by fid & lock it.
1274          *        regardless if it is local or remote.
1275          */
1276         child = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
1277
1278         if (unlikely(IS_ERR(child)))
1279                 GOTO(out_parent, rc = PTR_ERR(child));
1280         if (is_resent) {
1281                 /* Do not take lock for resent case. */
1282                 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1283                 LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
1284                          lhc->mlh_reg_lh.cookie);
1285
1286                 res_id = &lock->l_resource->lr_name;
1287                 if (!fid_res_name_eq(mdt_object_fid(child),
1288                                     &lock->l_resource->lr_name)) {
1289                          LASSERTF(fid_res_name_eq(mdt_object_fid(parent),
1290                                                  &lock->l_resource->lr_name),
1291                                  "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
1292                                  (unsigned long)res_id->name[0],
1293                                  (unsigned long)res_id->name[1],
1294                                  (unsigned long)res_id->name[2],
1295                                  PFID(mdt_object_fid(parent)));
1296                           CWARN("Although resent, but still not get child lock"
1297                                 "parent:"DFID" child:"DFID"\n",
1298                                 PFID(mdt_object_fid(parent)),
1299                                 PFID(mdt_object_fid(child)));
1300                           lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1301                           LDLM_LOCK_PUT(lock);
1302                           GOTO(relock, 0);
1303                 }
1304                 LDLM_LOCK_PUT(lock);
1305                 rc = 0;
1306         } else {
1307 relock:
1308                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout*2);
1309                 mdt_lock_handle_init(lhc);
1310                 if (child_bits == MDS_INODELOCK_LAYOUT)
1311                         mdt_lock_reg_init(lhc, LCK_CR);
1312                 else
1313                         mdt_lock_reg_init(lhc, LCK_PR);
1314
1315                 if (mdt_object_exists(child) == 0) {
1316                         LU_OBJECT_DEBUG(D_INODE, info->mti_env,
1317                                         &child->mot_obj.mo_lu,
1318                                         "Object doesn't exist!\n");
1319                         GOTO(out_child, rc = -ENOENT);
1320                 }
1321
1322                 if (!(child_bits & MDS_INODELOCK_UPDATE)) {
1323                         struct md_attr *ma = &info->mti_attr;
1324
1325                         ma->ma_valid = 0;
1326                         ma->ma_need = MA_INODE;
1327                         rc = mdt_attr_get_complex(info, child, ma);
1328                         if (unlikely(rc != 0))
1329                                 GOTO(out_child, rc);
1330
1331                         /* layout lock is used only on regular files */
1332                         if ((ma->ma_valid & MA_INODE) &&
1333                             (ma->ma_attr.la_valid & LA_MODE) &&
1334                             !S_ISREG(ma->ma_attr.la_mode))
1335                                 child_bits &= ~MDS_INODELOCK_LAYOUT;
1336
1337                         /* If the file has not been changed for some time, we
1338                          * return not only a LOOKUP lock, but also an UPDATE
1339                          * lock and this might save us RPC on later STAT. For
1340                          * directories, it also let negative dentry starts
1341                          * working for this dir. */
1342                         if (ma->ma_valid & MA_INODE &&
1343                             ma->ma_attr.la_valid & LA_CTIME &&
1344                             info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
1345                                 ma->ma_attr.la_ctime < cfs_time_current_sec())
1346                                 child_bits |= MDS_INODELOCK_UPDATE;
1347                 }
1348
1349                 rc = mdt_object_lock(info, child, lhc, child_bits,
1350                                      MDT_CROSS_LOCK);
1351
1352                 if (unlikely(rc != 0))
1353                         GOTO(out_child, rc);
1354         }
1355
1356         lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1357         /* Get MA_SOM attributes if update lock is given. */
1358         if (lock &&
1359             lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_UPDATE &&
1360             S_ISREG(lu_object_attr(&mdt_object_child(child)->mo_lu)))
1361                 ma_need = MA_SOM;
1362
1363         /* finally, we can get attr for child. */
1364         mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
1365         rc = mdt_getattr_internal(info, child, ma_need);
1366         if (unlikely(rc != 0)) {
1367                 mdt_object_unlock(info, child, lhc, 1);
1368         } else if (lock) {
1369                 /* Debugging code. */
1370                 res_id = &lock->l_resource->lr_name;
1371                 LDLM_DEBUG(lock, "Returning lock to client");
1372                 LASSERTF(fid_res_name_eq(mdt_object_fid(child),
1373                                          &lock->l_resource->lr_name),
1374                          "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
1375                          (unsigned long)res_id->name[0],
1376                          (unsigned long)res_id->name[1],
1377                          (unsigned long)res_id->name[2],
1378                          PFID(mdt_object_fid(child)));
1379                 mdt_pack_size2body(info, child);
1380         }
1381         if (lock)
1382                 LDLM_LOCK_PUT(lock);
1383
1384         EXIT;
1385 out_child:
1386         mdt_object_put(info->mti_env, child);
1387 out_parent:
1388         if (lhp)
1389                 mdt_object_unlock(info, parent, lhp, 1);
1390         return rc;
1391 }
1392
1393 /* normal handler: should release the child lock */
1394 static int mdt_getattr_name(struct mdt_thread_info *info)
1395 {
1396         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_CHILD];
1397         struct mdt_body        *reqbody;
1398         struct mdt_body        *repbody;
1399         int rc, rc2;
1400         ENTRY;
1401
1402         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1403         LASSERT(reqbody != NULL);
1404         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1405         LASSERT(repbody != NULL);
1406
1407         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
1408         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
1409         repbody->eadatasize = 0;
1410         repbody->aclsize = 0;
1411
1412         rc = mdt_init_ucred(info, reqbody);
1413         if (unlikely(rc))
1414                 GOTO(out_shrink, rc);
1415
1416         rc = mdt_getattr_name_lock(info, lhc, MDS_INODELOCK_UPDATE, NULL);
1417         if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
1418                 ldlm_lock_decref(&lhc->mlh_reg_lh, lhc->mlh_reg_mode);
1419                 lhc->mlh_reg_lh.cookie = 0;
1420         }
1421         mdt_exit_ucred(info);
1422         EXIT;
1423 out_shrink:
1424         mdt_client_compatibility(info);
1425         rc2 = mdt_fix_reply(info);
1426         if (rc == 0)
1427                 rc = rc2;
1428         return rc;
1429 }
1430
1431 static const struct lu_device_operations mdt_lu_ops;
1432
1433 static int lu_device_is_mdt(struct lu_device *d)
1434 {
1435         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &mdt_lu_ops);
1436 }
1437
1438 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1439                          void *karg, void *uarg);
1440
1441 static int mdt_set_info(struct mdt_thread_info *info)
1442 {
1443         struct ptlrpc_request *req = mdt_info_req(info);
1444         char *key;
1445         void *val;
1446         int keylen, vallen, rc = 0;
1447         ENTRY;
1448
1449         rc = req_capsule_server_pack(info->mti_pill);
1450         if (rc)
1451                 RETURN(rc);
1452
1453         key = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_KEY);
1454         if (key == NULL) {
1455                 DEBUG_REQ(D_HA, req, "no set_info key");
1456                 RETURN(-EFAULT);
1457         }
1458
1459         keylen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_KEY,
1460                                       RCL_CLIENT);
1461
1462         val = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_VAL);
1463         if (val == NULL) {
1464                 DEBUG_REQ(D_HA, req, "no set_info val");
1465                 RETURN(-EFAULT);
1466         }
1467
1468         vallen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_VAL,
1469                                       RCL_CLIENT);
1470
1471         /* Swab any part of val you need to here */
1472         if (KEY_IS(KEY_READ_ONLY)) {
1473                 req->rq_status = 0;
1474                 lustre_msg_set_status(req->rq_repmsg, 0);
1475
1476                 cfs_spin_lock(&req->rq_export->exp_lock);
1477                 if (*(__u32 *)val)
1478                         req->rq_export->exp_connect_flags |= OBD_CONNECT_RDONLY;
1479                 else
1480                         req->rq_export->exp_connect_flags &=~OBD_CONNECT_RDONLY;
1481                 cfs_spin_unlock(&req->rq_export->exp_lock);
1482
1483         } else if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
1484                 struct changelog_setinfo *cs =
1485                         (struct changelog_setinfo *)val;
1486                 if (vallen != sizeof(*cs)) {
1487                         CERROR("Bad changelog_clear setinfo size %d\n", vallen);
1488                         RETURN(-EINVAL);
1489                 }
1490                 if (ptlrpc_req_need_swab(req)) {
1491                         __swab64s(&cs->cs_recno);
1492                         __swab32s(&cs->cs_id);
1493                 }
1494
1495                 rc = mdt_iocontrol(OBD_IOC_CHANGELOG_CLEAR, info->mti_exp,
1496                                    vallen, val, NULL);
1497                 lustre_msg_set_status(req->rq_repmsg, rc);
1498
1499         } else {
1500                 RETURN(-EINVAL);
1501         }
1502         RETURN(0);
1503 }
1504
1505 static int mdt_connect(struct mdt_thread_info *info)
1506 {
1507         int rc;
1508         struct ptlrpc_request *req;
1509
1510         req = mdt_info_req(info);
1511         rc = target_handle_connect(req);
1512         if (rc == 0) {
1513                 LASSERT(req->rq_export != NULL);
1514                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
1515                 rc = mdt_init_sec_level(info);
1516                 if (rc == 0)
1517                         rc = mdt_init_idmap(info);
1518                 if (rc != 0)
1519                         obd_disconnect(class_export_get(req->rq_export));
1520         } else {
1521                 rc = err_serious(rc);
1522         }
1523         return rc;
1524 }
1525
1526 static int mdt_disconnect(struct mdt_thread_info *info)
1527 {
1528         int rc;
1529         ENTRY;
1530
1531         rc = target_handle_disconnect(mdt_info_req(info));
1532         if (rc)
1533                 rc = err_serious(rc);
1534         RETURN(rc);
1535 }
1536
1537 static int mdt_sendpage(struct mdt_thread_info *info,
1538                         struct lu_rdpg *rdpg, int nob)
1539 {
1540         struct ptlrpc_request   *req = mdt_info_req(info);
1541         struct obd_export       *exp = req->rq_export;
1542         struct ptlrpc_bulk_desc *desc;
1543         struct l_wait_info      *lwi = &info->mti_u.rdpg.mti_wait_info;
1544         int                      tmpcount;
1545         int                      tmpsize;
1546         int                      i;
1547         int                      rc;
1548         ENTRY;
1549
1550         desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, BULK_PUT_SOURCE,
1551                                     MDS_BULK_PORTAL);
1552         if (desc == NULL)
1553                 RETURN(-ENOMEM);
1554
1555         if (!(exp->exp_connect_flags & OBD_CONNECT_BRW_SIZE))
1556                 /* old client requires reply size in it's PAGE_SIZE,
1557                  * which is rdpg->rp_count */
1558                 nob = rdpg->rp_count;
1559
1560         for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1561              i++, tmpcount -= tmpsize) {
1562                 tmpsize = min_t(int, tmpcount, CFS_PAGE_SIZE);
1563                 ptlrpc_prep_bulk_page_pin(desc, rdpg->rp_pages[i], 0, tmpsize);
1564         }
1565
1566         LASSERT(desc->bd_nob == nob);
1567         rc = target_bulk_io(exp, desc, lwi);
1568         ptlrpc_free_bulk_pin(desc);
1569         RETURN(rc);
1570 }
1571
1572 #ifdef HAVE_SPLIT_SUPPORT
1573 /*
1574  * Retrieve dir entry from the page and insert it to the slave object, actually,
1575  * this should be in osd layer, but since it will not in the final product, so
1576  * just do it here and do not define more moo api anymore for this.
1577  */
1578 static int mdt_write_dir_page(struct mdt_thread_info *info, struct page *page,
1579                               int size)
1580 {
1581         struct mdt_object *object = info->mti_object;
1582         struct lu_fid *lf = &info->mti_tmp_fid2;
1583         struct md_attr *ma = &info->mti_attr;
1584         struct lu_dirpage *dp;
1585         struct lu_dirent *ent;
1586         int rc = 0, offset = 0;
1587         ENTRY;
1588
1589         /* Make sure we have at least one entry. */
1590         if (size == 0)
1591                 RETURN(-EINVAL);
1592
1593         /*
1594          * Disable trans for this name insert, since it will include many trans
1595          * for this.
1596          */
1597         info->mti_no_need_trans = 1;
1598         /*
1599          * When write_dir_page, no need update parent's ctime,
1600          * and no permission check for name_insert.
1601          */
1602         ma->ma_attr.la_ctime = 0;
1603         ma->ma_attr.la_valid = LA_MODE;
1604         ma->ma_valid = MA_INODE;
1605
1606         cfs_kmap(page);
1607         dp = page_address(page);
1608         offset = (int)((__u32)lu_dirent_start(dp) - (__u32)dp);
1609
1610         for (ent = lu_dirent_start(dp); ent != NULL;
1611              ent = lu_dirent_next(ent)) {
1612                 struct lu_name *lname;
1613                 char *name;
1614
1615                 if (le16_to_cpu(ent->lde_namelen) == 0)
1616                         continue;
1617
1618                 fid_le_to_cpu(lf, &ent->lde_fid);
1619                 if (le64_to_cpu(ent->lde_hash) & MAX_HASH_HIGHEST_BIT)
1620                         ma->ma_attr.la_mode = S_IFDIR;
1621                 else
1622                         ma->ma_attr.la_mode = 0;
1623                 OBD_ALLOC(name, le16_to_cpu(ent->lde_namelen) + 1);
1624                 if (name == NULL)
1625                         GOTO(out, rc = -ENOMEM);
1626
1627                 memcpy(name, ent->lde_name, le16_to_cpu(ent->lde_namelen));
1628                 lname = mdt_name(info->mti_env, name,
1629                                  le16_to_cpu(ent->lde_namelen));
1630                 ma->ma_attr_flags |= (MDS_PERM_BYPASS | MDS_QUOTA_IGNORE);
1631                 rc = mdo_name_insert(info->mti_env,
1632                                      md_object_next(&object->mot_obj),
1633                                      lname, lf, ma);
1634                 OBD_FREE(name, le16_to_cpu(ent->lde_namelen) + 1);
1635                 if (rc) {
1636                         CERROR("Can't insert %*.*s, rc %d\n",
1637                                le16_to_cpu(ent->lde_namelen),
1638                                le16_to_cpu(ent->lde_namelen),
1639                                ent->lde_name, rc);
1640                         GOTO(out, rc);
1641                 }
1642
1643                 offset += lu_dirent_size(ent);
1644                 if (offset >= size)
1645                         break;
1646         }
1647         EXIT;
1648 out:
1649         cfs_kunmap(page);
1650         return rc;
1651 }
1652
1653 static int mdt_bulk_timeout(void *data)
1654 {
1655         ENTRY;
1656
1657         CERROR("mdt bulk transfer timeout \n");
1658
1659         RETURN(1);
1660 }
1661
1662 static int mdt_writepage(struct mdt_thread_info *info)
1663 {
1664         struct ptlrpc_request   *req = mdt_info_req(info);
1665         struct mdt_body         *reqbody;
1666         struct l_wait_info      *lwi;
1667         struct ptlrpc_bulk_desc *desc;
1668         struct page             *page;
1669         int                rc;
1670         ENTRY;
1671
1672
1673         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1674         if (reqbody == NULL)
1675                 RETURN(err_serious(-EFAULT));
1676
1677         desc = ptlrpc_prep_bulk_exp(req, 1, BULK_GET_SINK, MDS_BULK_PORTAL);
1678         if (desc == NULL)
1679                 RETURN(err_serious(-ENOMEM));
1680
1681         /* allocate the page for the desc */
1682         page = cfs_alloc_page(CFS_ALLOC_STD);
1683         if (page == NULL)
1684                 GOTO(desc_cleanup, rc = -ENOMEM);
1685
1686         CDEBUG(D_INFO, "Received page offset %d size %d \n",
1687                (int)reqbody->size, (int)reqbody->nlink);
1688
1689         ptlrpc_prep_bulk_page(desc, page, (int)reqbody->size,
1690                               (int)reqbody->nlink);
1691
1692         rc = sptlrpc_svc_prep_bulk(req, desc);
1693         if (rc != 0)
1694                 GOTO(cleanup_page, rc);
1695         /*
1696          * Check if client was evicted while we were doing i/o before touching
1697          * network.
1698          */
1699         OBD_ALLOC_PTR(lwi);
1700         if (!lwi)
1701                 GOTO(cleanup_page, rc = -ENOMEM);
1702
1703         if (desc->bd_export->exp_failed)
1704                 rc = -ENOTCONN;
1705         else
1706                 rc = ptlrpc_start_bulk_transfer (desc);
1707         if (rc == 0) {
1708                 *lwi = LWI_TIMEOUT_INTERVAL(obd_timeout * CFS_HZ / 4, CFS_HZ,
1709                                             mdt_bulk_timeout, desc);
1710                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc) ||
1711                                   desc->bd_export->exp_failed, lwi);
1712                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
1713                 if (rc == -ETIMEDOUT) {
1714                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
1715                         ptlrpc_abort_bulk(desc);
1716                 } else if (desc->bd_export->exp_failed) {
1717                         DEBUG_REQ(D_ERROR, req, "Eviction on bulk GET");
1718                         rc = -ENOTCONN;
1719                         ptlrpc_abort_bulk(desc);
1720                 } else if (!desc->bd_success ||
1721                            desc->bd_nob_transferred != desc->bd_nob) {
1722                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
1723                                   desc->bd_success ?
1724                                   "truncated" : "network error on",
1725                                   desc->bd_nob_transferred, desc->bd_nob);
1726                         /* XXX should this be a different errno? */
1727                         rc = -ETIMEDOUT;
1728                 }
1729         } else {
1730                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d", rc);
1731         }
1732         if (rc)
1733                 GOTO(cleanup_lwi, rc);
1734         rc = mdt_write_dir_page(info, page, reqbody->nlink);
1735
1736 cleanup_lwi:
1737         OBD_FREE_PTR(lwi);
1738 cleanup_page:
1739         cfs_free_page(page);
1740 desc_cleanup:
1741         ptlrpc_free_bulk_pin(desc);
1742         RETURN(rc);
1743 }
1744 #endif
1745
1746 static int mdt_readpage(struct mdt_thread_info *info)
1747 {
1748         struct mdt_object *object = info->mti_object;
1749         struct lu_rdpg    *rdpg = &info->mti_u.rdpg.mti_rdpg;
1750         struct mdt_body   *reqbody;
1751         struct mdt_body   *repbody;
1752         int                rc;
1753         int                i;
1754         ENTRY;
1755
1756         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
1757                 RETURN(err_serious(-ENOMEM));
1758
1759         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1760         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1761         if (reqbody == NULL || repbody == NULL)
1762                 RETURN(err_serious(-EFAULT));
1763
1764         /*
1765          * prepare @rdpg before calling lower layers and transfer itself. Here
1766          * reqbody->size contains offset of where to start to read and
1767          * reqbody->nlink contains number bytes to read.
1768          */
1769         rdpg->rp_hash = reqbody->size;
1770         if (rdpg->rp_hash != reqbody->size) {
1771                 CERROR("Invalid hash: "LPX64" != "LPX64"\n",
1772                        rdpg->rp_hash, reqbody->size);
1773                 RETURN(-EFAULT);
1774         }
1775
1776         rdpg->rp_attrs = reqbody->mode;
1777         if (info->mti_exp->exp_connect_flags & OBD_CONNECT_64BITHASH)
1778                 rdpg->rp_attrs |= LUDA_64BITHASH;
1779         rdpg->rp_count  = min_t(unsigned int, reqbody->nlink,
1780                                 PTLRPC_MAX_BRW_SIZE);
1781         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE - 1) >>
1782                           CFS_PAGE_SHIFT;
1783         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1784         if (rdpg->rp_pages == NULL)
1785                 RETURN(-ENOMEM);
1786
1787         for (i = 0; i < rdpg->rp_npages; ++i) {
1788                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
1789                 if (rdpg->rp_pages[i] == NULL)
1790                         GOTO(free_rdpg, rc = -ENOMEM);
1791         }
1792
1793         /* call lower layers to fill allocated pages with directory data */
1794         rc = mo_readpage(info->mti_env, mdt_object_child(object), rdpg);
1795         if (rc < 0)
1796                 GOTO(free_rdpg, rc);
1797
1798         /* send pages to client */
1799         rc = mdt_sendpage(info, rdpg, rc);
1800
1801         EXIT;
1802 free_rdpg:
1803
1804         for (i = 0; i < rdpg->rp_npages; i++)
1805                 if (rdpg->rp_pages[i] != NULL)
1806                         cfs_free_page(rdpg->rp_pages[i]);
1807         OBD_FREE(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1808
1809         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
1810                 RETURN(0);
1811
1812         return rc;
1813 }
1814
1815 static int mdt_reint_internal(struct mdt_thread_info *info,
1816                               struct mdt_lock_handle *lhc,
1817                               __u32 op)
1818 {
1819         struct req_capsule      *pill = info->mti_pill;
1820         struct mdt_body         *repbody;
1821         int                      rc = 0, rc2;
1822         ENTRY;
1823
1824
1825         rc = mdt_reint_unpack(info, op);
1826         if (rc != 0) {
1827                 CERROR("Can't unpack reint, rc %d\n", rc);
1828                 RETURN(err_serious(rc));
1829         }
1830
1831         /* for replay (no_create) lmm is not needed, client has it already */
1832         if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1833                 req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
1834                                      info->mti_rr.rr_eadatalen);
1835
1836         /* llog cookies are always 0, the field is kept for compatibility */
1837         if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
1838                 req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER, 0);
1839
1840         rc = req_capsule_server_pack(pill);
1841         if (rc != 0) {
1842                 CERROR("Can't pack response, rc %d\n", rc);
1843                 RETURN(err_serious(rc));
1844         }
1845
1846         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_SERVER)) {
1847                 repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1848                 LASSERT(repbody);
1849                 repbody->eadatasize = 0;
1850                 repbody->aclsize = 0;
1851         }
1852
1853         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_REINT_DELAY, 10);
1854
1855         /* for replay no cookkie / lmm need, because client have this already */
1856         if (info->mti_spec.no_create)
1857                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1858                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, 0);
1859
1860         rc = mdt_init_ucred_reint(info);
1861         if (rc)
1862                 GOTO(out_shrink, rc);
1863
1864         rc = mdt_fix_attr_ucred(info, op);
1865         if (rc != 0)
1866                 GOTO(out_ucred, rc = err_serious(rc));
1867
1868         if (mdt_check_resent(info, mdt_reconstruct, lhc)) {
1869                 rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
1870                 GOTO(out_ucred, rc);
1871         }
1872         rc = mdt_reint_rec(info, lhc);
1873         EXIT;
1874 out_ucred:
1875         mdt_exit_ucred(info);
1876 out_shrink:
1877         mdt_client_compatibility(info);
1878         rc2 = mdt_fix_reply(info);
1879         if (rc == 0)
1880                 rc = rc2;
1881         return rc;
1882 }
1883
1884 static long mdt_reint_opcode(struct mdt_thread_info *info,
1885                              const struct req_format **fmt)
1886 {
1887         struct mdt_rec_reint *rec;
1888         long opc;
1889
1890         opc = err_serious(-EFAULT);
1891         rec = req_capsule_client_get(info->mti_pill, &RMF_REC_REINT);
1892         if (rec != NULL) {
1893                 opc = rec->rr_opcode;
1894                 DEBUG_REQ(D_INODE, mdt_info_req(info), "reint opt = %ld", opc);
1895                 if (opc < REINT_MAX && fmt[opc] != NULL)
1896                         req_capsule_extend(info->mti_pill, fmt[opc]);
1897                 else {
1898                         CERROR("Unsupported opc: %ld\n", opc);
1899                         opc = err_serious(opc);
1900                 }
1901         }
1902         return opc;
1903 }
1904
1905 static int mdt_reint(struct mdt_thread_info *info)
1906 {
1907         long opc;
1908         int  rc;
1909
1910         static const struct req_format *reint_fmts[REINT_MAX] = {
1911                 [REINT_SETATTR]  = &RQF_MDS_REINT_SETATTR,
1912                 [REINT_CREATE]   = &RQF_MDS_REINT_CREATE,
1913                 [REINT_LINK]     = &RQF_MDS_REINT_LINK,
1914                 [REINT_UNLINK]   = &RQF_MDS_REINT_UNLINK,
1915                 [REINT_RENAME]   = &RQF_MDS_REINT_RENAME,
1916                 [REINT_OPEN]     = &RQF_MDS_REINT_OPEN,
1917                 [REINT_SETXATTR] = &RQF_MDS_REINT_SETXATTR
1918         };
1919
1920         ENTRY;
1921
1922         opc = mdt_reint_opcode(info, reint_fmts);
1923         if (opc >= 0) {
1924                 /*
1925                  * No lock possible here from client to pass it to reint code
1926                  * path.
1927                  */
1928                 rc = mdt_reint_internal(info, NULL, opc);
1929         } else {
1930                 rc = opc;
1931         }
1932
1933         info->mti_fail_id = OBD_FAIL_MDS_REINT_NET_REP;
1934         RETURN(rc);
1935 }
1936
1937 /* this should sync the whole device */
1938 static int mdt_device_sync(const struct lu_env *env, struct mdt_device *mdt)
1939 {
1940         struct dt_device *dt = mdt->mdt_bottom;
1941         int rc;
1942         ENTRY;
1943
1944         rc = dt->dd_ops->dt_sync(env, dt);
1945         RETURN(rc);
1946 }
1947
1948 /* this should sync this object */
1949 static int mdt_object_sync(struct mdt_thread_info *info)
1950 {
1951         struct md_object *next;
1952         int rc;
1953         ENTRY;
1954
1955         if (!mdt_object_exists(info->mti_object)) {
1956                 CWARN("Non existing object  "DFID"!\n",
1957                       PFID(mdt_object_fid(info->mti_object)));
1958                 RETURN(-ESTALE);
1959         }
1960         next = mdt_object_child(info->mti_object);
1961         rc = mo_object_sync(info->mti_env, next);
1962
1963         RETURN(rc);
1964 }
1965
1966 static int mdt_sync(struct mdt_thread_info *info)
1967 {
1968         struct ptlrpc_request *req = mdt_info_req(info);
1969         struct req_capsule *pill = info->mti_pill;
1970         struct mdt_body *body;
1971         int rc;
1972         ENTRY;
1973
1974         /* The fid may be zero, so we req_capsule_set manually */
1975         req_capsule_set(pill, &RQF_MDS_SYNC);
1976
1977         body = req_capsule_client_get(pill, &RMF_MDT_BODY);
1978         if (body == NULL)
1979                 RETURN(err_serious(-EINVAL));
1980
1981         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1982                 RETURN(err_serious(-ENOMEM));
1983
1984         if (fid_seq(&body->fid1) == 0) {
1985                 /* sync the whole device */
1986                 rc = req_capsule_server_pack(pill);
1987                 if (rc == 0)
1988                         rc = mdt_device_sync(info->mti_env, info->mti_mdt);
1989                 else
1990                         rc = err_serious(rc);
1991         } else {
1992                 /* sync an object */
1993                 rc = mdt_unpack_req_pack_rep(info, HABEO_CORPUS|HABEO_REFERO);
1994                 if (rc == 0) {
1995                         rc = mdt_object_sync(info);
1996                         if (rc == 0) {
1997                                 const struct lu_fid *fid;
1998                                 struct lu_attr *la = &info->mti_attr.ma_attr;
1999
2000                                 info->mti_attr.ma_need = MA_INODE;
2001                                 info->mti_attr.ma_valid = 0;
2002                                 rc = mdt_attr_get_complex(info, info->mti_object,
2003                                                           &info->mti_attr);
2004                                 if (rc == 0) {
2005                                         body = req_capsule_server_get(pill,
2006                                                                 &RMF_MDT_BODY);
2007                                         fid = mdt_object_fid(info->mti_object);
2008                                         mdt_pack_attr2body(info, body, la, fid);
2009                                 }
2010                         }
2011                 } else
2012                         rc = err_serious(rc);
2013         }
2014         if (rc == 0)
2015                 mdt_counter_incr(req, LPROC_MDT_SYNC);
2016
2017         RETURN(rc);
2018 }
2019
2020 /*
2021  * Quotacheck handler.
2022  * in-kernel quotacheck isn't supported any more.
2023  */
2024 static int mdt_quotacheck(struct mdt_thread_info *info)
2025 {
2026         struct obd_quotactl     *oqctl;
2027         int                      rc;
2028         ENTRY;
2029
2030         oqctl = req_capsule_client_get(info->mti_pill, &RMF_OBD_QUOTACTL);
2031         if (oqctl == NULL)
2032                 RETURN(err_serious(-EPROTO));
2033
2034         rc = req_capsule_server_pack(info->mti_pill);
2035         if (rc)
2036                 RETURN(err_serious(rc));
2037
2038         /* deprecated, not used any more */
2039         RETURN(-EOPNOTSUPP);
2040 }
2041
2042 /*
2043  * Handle quota control requests to consult current usage/limit, but also
2044  * to configure quota enforcement
2045  */
2046 static int mdt_quotactl(struct mdt_thread_info *info)
2047 {
2048         struct obd_export       *exp  = info->mti_exp;
2049         struct req_capsule      *pill = info->mti_pill;
2050         struct obd_quotactl     *oqctl, *repoqc;
2051         int                      id, rc;
2052         struct lu_device        *qmt = info->mti_mdt->mdt_qmt_dev;
2053         ENTRY;
2054
2055         oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
2056         if (oqctl == NULL)
2057                 RETURN(err_serious(-EPROTO));
2058
2059         rc = req_capsule_server_pack(pill);
2060         if (rc)
2061                 RETURN(err_serious(rc));
2062
2063         switch (oqctl->qc_cmd) {
2064         case Q_QUOTACHECK:
2065         case LUSTRE_Q_INVALIDATE:
2066         case LUSTRE_Q_FINVALIDATE:
2067         case Q_QUOTAON:
2068         case Q_QUOTAOFF:
2069         case Q_INITQUOTA:
2070                 /* deprecated, not used any more */
2071                 RETURN(-EOPNOTSUPP);
2072                 /* master quotactl */
2073         case Q_GETINFO:
2074         case Q_SETINFO:
2075         case Q_SETQUOTA:
2076         case Q_GETQUOTA:
2077                 if (qmt == NULL)
2078                         RETURN(-EOPNOTSUPP);
2079                 /* slave quotactl */
2080         case Q_GETOINFO:
2081         case Q_GETOQUOTA:
2082                 break;
2083         default:
2084                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
2085                 RETURN(-EFAULT);
2086         }
2087
2088         /* map uid/gid for remote client */
2089         id = oqctl->qc_id;
2090         if (exp_connect_rmtclient(exp)) {
2091                 struct lustre_idmap_table *idmap;
2092
2093                 idmap = mdt_req2med(mdt_info_req(info))->med_idmap;
2094
2095                 if (unlikely(oqctl->qc_cmd != Q_GETQUOTA &&
2096                              oqctl->qc_cmd != Q_GETINFO))
2097                         RETURN(-EPERM);
2098
2099                 if (oqctl->qc_type == USRQUOTA)
2100                         id = lustre_idmap_lookup_uid(NULL, idmap, 0,
2101                                                      oqctl->qc_id);
2102                 else if (oqctl->qc_type == GRPQUOTA)
2103                         id = lustre_idmap_lookup_gid(NULL, idmap, 0,
2104                                                      oqctl->qc_id);
2105                 else
2106                         RETURN(-EINVAL);
2107
2108                 if (id == CFS_IDMAP_NOTFOUND) {
2109                         CDEBUG(D_QUOTA, "no mapping for id %u\n", oqctl->qc_id);
2110                         RETURN(-EACCES);
2111                 }
2112         }
2113
2114         repoqc = req_capsule_server_get(pill, &RMF_OBD_QUOTACTL);
2115         if (repoqc == NULL)
2116                 RETURN(err_serious(-EFAULT));
2117
2118         if (oqctl->qc_id != id)
2119                 swap(oqctl->qc_id, id);
2120
2121         switch (oqctl->qc_cmd) {
2122
2123         case Q_GETINFO:
2124         case Q_SETINFO:
2125         case Q_SETQUOTA:
2126         case Q_GETQUOTA:
2127                 /* forward quotactl request to QMT */
2128                 rc = qmt_hdls.qmth_quotactl(info->mti_env, qmt, oqctl);
2129                 break;
2130
2131         case Q_GETOINFO:
2132         case Q_GETOQUOTA:
2133                 /* slave quotactl */
2134                 rc = lquotactl_slv(info->mti_env, info->mti_mdt->mdt_bottom,
2135                                    oqctl);
2136                 break;
2137
2138         default:
2139                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
2140                 RETURN(-EFAULT);
2141         }
2142
2143         if (oqctl->qc_id != id)
2144                 swap(oqctl->qc_id, id);
2145
2146         *repoqc = *oqctl;
2147         RETURN(rc);
2148 }
2149
2150 /*
2151  * OBD PING and other handlers.
2152  */
2153 static int mdt_obd_ping(struct mdt_thread_info *info)
2154 {
2155         int rc;
2156         ENTRY;
2157
2158         req_capsule_set(info->mti_pill, &RQF_OBD_PING);
2159
2160         rc = target_handle_ping(mdt_info_req(info));
2161         if (rc < 0)
2162                 rc = err_serious(rc);
2163         RETURN(rc);
2164 }
2165
2166 /*
2167  * OBD_IDX_READ handler
2168  */
2169 static int mdt_obd_idx_read(struct mdt_thread_info *info)
2170 {
2171         struct mdt_device       *mdt = info->mti_mdt;
2172         struct lu_rdpg          *rdpg = &info->mti_u.rdpg.mti_rdpg;
2173         struct idx_info         *req_ii, *rep_ii;
2174         int                      rc, i;
2175         ENTRY;
2176
2177         memset(rdpg, 0, sizeof(*rdpg));
2178         req_capsule_set(info->mti_pill, &RQF_OBD_IDX_READ);
2179
2180         /* extract idx_info buffer from request & reply */
2181         req_ii = req_capsule_client_get(info->mti_pill, &RMF_IDX_INFO);
2182         if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
2183                 RETURN(err_serious(-EPROTO));
2184
2185         rc = req_capsule_server_pack(info->mti_pill);
2186         if (rc)
2187                 RETURN(err_serious(rc));
2188
2189         rep_ii = req_capsule_server_get(info->mti_pill, &RMF_IDX_INFO);
2190         if (rep_ii == NULL)
2191                 RETURN(err_serious(-EFAULT));
2192         rep_ii->ii_magic = IDX_INFO_MAGIC;
2193
2194         /* extract hash to start with */
2195         rdpg->rp_hash = req_ii->ii_hash_start;
2196
2197         /* extract requested attributes */
2198         rdpg->rp_attrs = req_ii->ii_attrs;
2199
2200         /* check that fid packed in request is valid and supported */
2201         if (!fid_is_sane(&req_ii->ii_fid))
2202                 RETURN(-EINVAL);
2203         rep_ii->ii_fid = req_ii->ii_fid;
2204
2205         /* copy flags */
2206         rep_ii->ii_flags = req_ii->ii_flags;
2207
2208         /* compute number of pages to allocate, ii_count is the number of 4KB
2209          * containers */
2210         if (req_ii->ii_count <= 0)
2211                 GOTO(out, rc = -EFAULT);
2212         rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
2213                                PTLRPC_MAX_BRW_SIZE);
2214         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE -1) >> CFS_PAGE_SHIFT;
2215
2216         /* allocate pages to store the containers */
2217         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2218         if (rdpg->rp_pages == NULL)
2219                 GOTO(out, rc = -ENOMEM);
2220         for (i = 0; i < rdpg->rp_npages; i++) {
2221                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
2222                 if (rdpg->rp_pages[i] == NULL)
2223                         GOTO(out, rc = -ENOMEM);
2224         }
2225
2226         /* populate pages with key/record pairs */
2227         rc = dt_index_read(info->mti_env, mdt->mdt_bottom, rep_ii, rdpg);
2228         if (rc < 0)
2229                 GOTO(out, rc);
2230
2231         LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
2232                  "asked %d > %d\n", rc, rdpg->rp_count);
2233
2234         /* send pages to client */
2235         rc = mdt_sendpage(info, rdpg, rc);
2236
2237         GOTO(out, rc);
2238 out:
2239         if (rdpg->rp_pages) {
2240                 for (i = 0; i < rdpg->rp_npages; i++)
2241                         if (rdpg->rp_pages[i])
2242                                 cfs_free_page(rdpg->rp_pages[i]);
2243                 OBD_FREE(rdpg->rp_pages,
2244                          rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2245         }
2246         return rc;
2247 }
2248
2249 static int mdt_obd_log_cancel(struct mdt_thread_info *info)
2250 {
2251         return err_serious(-EOPNOTSUPP);
2252 }
2253
2254 static int mdt_obd_qc_callback(struct mdt_thread_info *info)
2255 {
2256         return err_serious(-EOPNOTSUPP);
2257 }
2258
2259
2260 /*
2261  * LLOG handlers.
2262  */
2263
2264 /** clone llog ctxt from child (mdd)
2265  * This allows remote llog (replicator) access.
2266  * We can either pass all llog RPCs (eg mdt_llog_create) on to child where the
2267  * context was originally set up, or we can handle them directly.
2268  * I choose the latter, but that means I need any llog
2269  * contexts set up by child to be accessable by the mdt.  So we clone the
2270  * context into our context list here.
2271  */
2272 static int mdt_llog_ctxt_clone(const struct lu_env *env, struct mdt_device *mdt,
2273                                int idx)
2274 {
2275         struct md_device  *next = mdt->mdt_child;
2276         struct llog_ctxt *ctxt;
2277         int rc;
2278
2279         if (!llog_ctxt_null(mdt2obd_dev(mdt), idx))
2280                 return 0;
2281
2282         rc = next->md_ops->mdo_llog_ctxt_get(env, next, idx, (void **)&ctxt);
2283         if (rc || ctxt == NULL) {
2284                 return 0;
2285         }
2286
2287         rc = llog_group_set_ctxt(&mdt2obd_dev(mdt)->obd_olg, ctxt, idx);
2288         if (rc)
2289                 CERROR("Can't set mdt ctxt %d\n", rc);
2290
2291         return rc;
2292 }
2293
2294 static int mdt_llog_ctxt_unclone(const struct lu_env *env,
2295                                  struct mdt_device *mdt, int idx)
2296 {
2297         struct llog_ctxt *ctxt;
2298
2299         ctxt = llog_get_context(mdt2obd_dev(mdt), idx);
2300         if (ctxt == NULL)
2301                 return 0;
2302         /* Put once for the get we just did, and once for the clone */
2303         llog_ctxt_put(ctxt);
2304         llog_ctxt_put(ctxt);
2305         return 0;
2306 }
2307
2308 static int mdt_llog_create(struct mdt_thread_info *info)
2309 {
2310         int rc;
2311
2312         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
2313         rc = llog_origin_handle_open(mdt_info_req(info));
2314         return (rc < 0 ? err_serious(rc) : rc);
2315 }
2316
2317 static int mdt_llog_destroy(struct mdt_thread_info *info)
2318 {
2319         int rc;
2320
2321         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_DESTROY);
2322         rc = llog_origin_handle_destroy(mdt_info_req(info));
2323         return (rc < 0 ? err_serious(rc) : rc);
2324 }
2325
2326 static int mdt_llog_read_header(struct mdt_thread_info *info)
2327 {
2328         int rc;
2329
2330         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2331         rc = llog_origin_handle_read_header(mdt_info_req(info));
2332         return (rc < 0 ? err_serious(rc) : rc);
2333 }
2334
2335 static int mdt_llog_next_block(struct mdt_thread_info *info)
2336 {
2337         int rc;
2338
2339         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
2340         rc = llog_origin_handle_next_block(mdt_info_req(info));
2341         return (rc < 0 ? err_serious(rc) : rc);
2342 }
2343
2344 static int mdt_llog_prev_block(struct mdt_thread_info *info)
2345 {
2346         int rc;
2347
2348         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
2349         rc = llog_origin_handle_prev_block(mdt_info_req(info));
2350         return (rc < 0 ? err_serious(rc) : rc);
2351 }
2352
2353
2354 /*
2355  * DLM handlers.
2356  */
2357 static struct ldlm_callback_suite cbs = {
2358         .lcs_completion = ldlm_server_completion_ast,
2359         .lcs_blocking   = ldlm_server_blocking_ast,
2360         .lcs_glimpse    = ldlm_server_glimpse_ast
2361 };
2362
2363 static int mdt_enqueue(struct mdt_thread_info *info)
2364 {
2365         struct ptlrpc_request *req;
2366         int rc;
2367
2368         /*
2369          * info->mti_dlm_req already contains swapped and (if necessary)
2370          * converted dlm request.
2371          */
2372         LASSERT(info->mti_dlm_req != NULL);
2373
2374         req = mdt_info_req(info);
2375         rc = ldlm_handle_enqueue0(info->mti_mdt->mdt_namespace,
2376                                   req, info->mti_dlm_req, &cbs);
2377         info->mti_fail_id = OBD_FAIL_LDLM_REPLY;
2378         return rc ? err_serious(rc) : req->rq_status;
2379 }
2380
2381 static int mdt_convert(struct mdt_thread_info *info)
2382 {
2383         int rc;
2384         struct ptlrpc_request *req;
2385
2386         LASSERT(info->mti_dlm_req);
2387         req = mdt_info_req(info);
2388         rc = ldlm_handle_convert0(req, info->mti_dlm_req);
2389         return rc ? err_serious(rc) : req->rq_status;
2390 }
2391
2392 static int mdt_bl_callback(struct mdt_thread_info *info)
2393 {
2394         CERROR("bl callbacks should not happen on MDS\n");
2395         LBUG();
2396         return err_serious(-EOPNOTSUPP);
2397 }
2398
2399 static int mdt_cp_callback(struct mdt_thread_info *info)
2400 {
2401         CERROR("cp callbacks should not happen on MDS\n");
2402         LBUG();
2403         return err_serious(-EOPNOTSUPP);
2404 }
2405
2406 /*
2407  * sec context handlers
2408  */
2409 static int mdt_sec_ctx_handle(struct mdt_thread_info *info)
2410 {
2411         int rc;
2412
2413         rc = mdt_handle_idmap(info);
2414
2415         if (unlikely(rc)) {
2416                 struct ptlrpc_request *req = mdt_info_req(info);
2417                 __u32                  opc;
2418
2419                 opc = lustre_msg_get_opc(req->rq_reqmsg);
2420                 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT)
2421                         sptlrpc_svc_ctx_invalidate(req);
2422         }
2423
2424         CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
2425
2426         return rc;
2427 }
2428
2429 /*
2430  * quota request handlers
2431  */
2432 static int mdt_quota_dqacq(struct mdt_thread_info *info)
2433 {
2434         struct lu_device        *qmt = info->mti_mdt->mdt_qmt_dev;
2435         int                      rc;
2436         ENTRY;
2437
2438         if (qmt == NULL)
2439                 RETURN(err_serious(-EOPNOTSUPP));
2440
2441         rc = qmt_hdls.qmth_dqacq(info->mti_env, qmt, mdt_info_req(info));
2442         RETURN(rc);
2443 }
2444
2445 static struct mdt_object *mdt_obj(struct lu_object *o)
2446 {
2447         LASSERT(lu_device_is_mdt(o->lo_dev));
2448         return container_of0(o, struct mdt_object, mot_obj.mo_lu);
2449 }
2450
2451 struct mdt_object *mdt_object_new(const struct lu_env *env,
2452                                   struct mdt_device *d,
2453                                   const struct lu_fid *f)
2454 {
2455         struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2456         struct lu_object *o;
2457         struct mdt_object *m;
2458         ENTRY;
2459
2460         CDEBUG(D_INFO, "Allocate object for "DFID"\n", PFID(f));
2461         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, &conf);
2462         if (unlikely(IS_ERR(o)))
2463                 m = (struct mdt_object *)o;
2464         else
2465                 m = mdt_obj(o);
2466         RETURN(m);
2467 }
2468
2469 struct mdt_object *mdt_object_find(const struct lu_env *env,
2470                                    struct mdt_device *d,
2471                                    const struct lu_fid *f)
2472 {
2473         struct lu_object *o;
2474         struct mdt_object *m;
2475         ENTRY;
2476
2477         CDEBUG(D_INFO, "Find object for "DFID"\n", PFID(f));
2478         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, NULL);
2479         if (unlikely(IS_ERR(o)))
2480                 m = (struct mdt_object *)o;
2481         else
2482                 m = mdt_obj(o);
2483         RETURN(m);
2484 }
2485
2486 /**
2487  * Asyncronous commit for mdt device.
2488  *
2489  * Pass asynchonous commit call down the MDS stack.
2490  *
2491  * \param env environment
2492  * \param mdt the mdt device
2493  */
2494 static void mdt_device_commit_async(const struct lu_env *env,
2495                                     struct mdt_device *mdt)
2496 {
2497         struct dt_device *dt = mdt->mdt_bottom;
2498         int rc;
2499
2500         rc = dt->dd_ops->dt_commit_async(env, dt);
2501         if (unlikely(rc != 0))
2502                 CWARN("async commit start failed with rc = %d", rc);
2503 }
2504
2505 /**
2506  * Mark the lock as "synchonous".
2507  *
2508  * Mark the lock to deffer transaction commit to the unlock time.
2509  *
2510  * \param lock the lock to mark as "synchonous"
2511  *
2512  * \see mdt_is_lock_sync
2513  * \see mdt_save_lock
2514  */
2515 static inline void mdt_set_lock_sync(struct ldlm_lock *lock)
2516 {
2517         lock->l_ast_data = (void*)1;
2518 }
2519
2520 /**
2521  * Check whehter the lock "synchonous" or not.
2522  *
2523  * \param lock the lock to check
2524  * \retval 1 the lock is "synchonous"
2525  * \retval 0 the lock isn't "synchronous"
2526  *
2527  * \see mdt_set_lock_sync
2528  * \see mdt_save_lock
2529  */
2530 static inline int mdt_is_lock_sync(struct ldlm_lock *lock)
2531 {
2532         return lock->l_ast_data != NULL;
2533 }
2534
2535 /**
2536  * Blocking AST for mdt locks.
2537  *
2538  * Starts transaction commit if in case of COS lock conflict or
2539  * deffers such a commit to the mdt_save_lock.
2540  *
2541  * \param lock the lock which blocks a request or cancelling lock
2542  * \param desc unused
2543  * \param data unused
2544  * \param flag indicates whether this cancelling or blocking callback
2545  * \retval 0
2546  * \see ldlm_blocking_ast_nocheck
2547  */
2548 int mdt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2549                      void *data, int flag)
2550 {
2551         struct obd_device *obd = ldlm_lock_to_ns(lock)->ns_obd;
2552         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
2553         int rc;
2554         ENTRY;
2555
2556         if (flag == LDLM_CB_CANCELING)
2557                 RETURN(0);
2558         lock_res_and_lock(lock);
2559         if (lock->l_blocking_ast != mdt_blocking_ast) {
2560                 unlock_res_and_lock(lock);
2561                 RETURN(0);
2562         }
2563         if (mdt_cos_is_enabled(mdt) &&
2564             lock->l_req_mode & (LCK_PW | LCK_EX) &&
2565             lock->l_blocking_lock != NULL &&
2566             lock->l_client_cookie != lock->l_blocking_lock->l_client_cookie) {
2567                 mdt_set_lock_sync(lock);
2568         }
2569         rc = ldlm_blocking_ast_nocheck(lock);
2570
2571         /* There is no lock conflict if l_blocking_lock == NULL,
2572          * it indicates a blocking ast sent from ldlm_lock_decref_internal
2573          * when the last reference to a local lock was released */
2574         if (lock->l_req_mode == LCK_COS && lock->l_blocking_lock != NULL) {
2575                 struct lu_env env;
2576
2577                 rc = lu_env_init(&env, LCT_LOCAL);
2578                 if (unlikely(rc != 0))
2579                         CWARN("lu_env initialization failed with rc = %d,"
2580                               "cannot start asynchronous commit\n", rc);
2581                 else
2582                         mdt_device_commit_async(&env, mdt);
2583                 lu_env_fini(&env);
2584         }
2585         RETURN(rc);
2586 }
2587
2588 int mdt_object_lock(struct mdt_thread_info *info, struct mdt_object *o,
2589                     struct mdt_lock_handle *lh, __u64 ibits, int locality)
2590 {
2591         struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
2592         ldlm_policy_data_t *policy = &info->mti_policy;
2593         struct ldlm_res_id *res_id = &info->mti_res_id;
2594         int rc;
2595         ENTRY;
2596
2597         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2598         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2599         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
2600         LASSERT(lh->mlh_type != MDT_NUL_LOCK);
2601
2602         if (mdt_object_exists(o) < 0) {
2603                 if (locality == MDT_CROSS_LOCK) {
2604                         /* cross-ref object fix */
2605                         ibits &= ~MDS_INODELOCK_UPDATE;
2606                         ibits |= MDS_INODELOCK_LOOKUP;
2607                 } else {
2608                         LASSERT(!(ibits & MDS_INODELOCK_UPDATE));
2609                         LASSERT(ibits & MDS_INODELOCK_LOOKUP);
2610                 }
2611                 /* No PDO lock on remote object */
2612                 LASSERT(lh->mlh_type != MDT_PDO_LOCK);
2613         }
2614
2615         if (lh->mlh_type == MDT_PDO_LOCK) {
2616                 /* check for exists after object is locked */
2617                 if (mdt_object_exists(o) == 0) {
2618                         /* Non-existent object shouldn't have PDO lock */
2619                         RETURN(-ESTALE);
2620                 } else {
2621                         /* Non-dir object shouldn't have PDO lock */
2622                         if (!S_ISDIR(lu_object_attr(&o->mot_obj.mo_lu)))
2623                                 RETURN(-ENOTDIR);
2624                 }
2625         }
2626
2627         memset(policy, 0, sizeof(*policy));
2628         fid_build_reg_res_name(mdt_object_fid(o), res_id);
2629
2630         /*
2631          * Take PDO lock on whole directory and build correct @res_id for lock
2632          * on part of directory.
2633          */
2634         if (lh->mlh_pdo_hash != 0) {
2635                 LASSERT(lh->mlh_type == MDT_PDO_LOCK);
2636                 mdt_lock_pdo_mode(info, o, lh);
2637                 if (lh->mlh_pdo_mode != LCK_NL) {
2638                         /*
2639                          * Do not use LDLM_FL_LOCAL_ONLY for parallel lock, it
2640                          * is never going to be sent to client and we do not
2641                          * want it slowed down due to possible cancels.
2642                          */
2643                         policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
2644                         rc = mdt_fid_lock(ns, &lh->mlh_pdo_lh, lh->mlh_pdo_mode,
2645                                           policy, res_id, LDLM_FL_ATOMIC_CB,
2646                                           &info->mti_exp->exp_handle.h_cookie);
2647                         if (unlikely(rc))
2648                                 RETURN(rc);
2649                 }
2650
2651                 /*
2652                  * Finish res_id initializing by name hash marking part of
2653                  * directory which is taking modification.
2654                  */
2655                 res_id->name[LUSTRE_RES_ID_HSH_OFF] = lh->mlh_pdo_hash;
2656         }
2657
2658         policy->l_inodebits.bits = ibits;
2659
2660         /*
2661          * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
2662          * going to be sent to client. If it is - mdt_intent_policy() path will
2663          * fix it up and turn FL_LOCAL flag off.
2664          */
2665         rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy,
2666                           res_id, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB,
2667                           &info->mti_exp->exp_handle.h_cookie);
2668         if (rc)
2669                 mdt_object_unlock(info, o, lh, 1);
2670         else if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_MDS_PDO_LOCK)) &&
2671                  lh->mlh_pdo_hash != 0 &&
2672                  (lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX)) {
2673                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK, 15);
2674         }
2675
2676         RETURN(rc);
2677 }
2678
2679 /**
2680  * Save a lock within request object.
2681  *
2682  * Keep the lock referenced until whether client ACK or transaction
2683  * commit happens or release the lock immediately depending on input
2684  * parameters. If COS is ON, a write lock is converted to COS lock
2685  * before saving.
2686  *
2687  * \param info thead info object
2688  * \param h lock handle
2689  * \param mode lock mode
2690  * \param decref force immediate lock releasing
2691  */
2692 static
2693 void mdt_save_lock(struct mdt_thread_info *info, struct lustre_handle *h,
2694                    ldlm_mode_t mode, int decref)
2695 {
2696         ENTRY;
2697
2698         if (lustre_handle_is_used(h)) {
2699                 if (decref || !info->mti_has_trans ||
2700                     !(mode & (LCK_PW | LCK_EX))){
2701                         mdt_fid_unlock(h, mode);
2702                 } else {
2703                         struct mdt_device *mdt = info->mti_mdt;
2704                         struct ldlm_lock *lock = ldlm_handle2lock(h);
2705                         struct ptlrpc_request *req = mdt_info_req(info);
2706                         int no_ack = 0;
2707
2708                         LASSERTF(lock != NULL, "no lock for cookie "LPX64"\n",
2709                                  h->cookie);
2710                         CDEBUG(D_HA, "request = %p reply state = %p"
2711                                " transno = "LPD64"\n",
2712                                req, req->rq_reply_state, req->rq_transno);
2713                         if (mdt_cos_is_enabled(mdt)) {
2714                                 no_ack = 1;
2715                                 ldlm_lock_downgrade(lock, LCK_COS);
2716                                 mode = LCK_COS;
2717                         }
2718                         ptlrpc_save_lock(req, h, mode, no_ack);
2719                         if (mdt_is_lock_sync(lock)) {
2720                                 CDEBUG(D_HA, "found sync-lock,"
2721                                        " async commit started\n");
2722                                 mdt_device_commit_async(info->mti_env,
2723                                                         mdt);
2724                         }
2725                         LDLM_LOCK_PUT(lock);
2726                 }
2727                 h->cookie = 0ull;
2728         }
2729
2730         EXIT;
2731 }
2732
2733 /**
2734  * Unlock mdt object.
2735  *
2736  * Immeditely release the regular lock and the PDO lock or save the
2737  * lock in reqeuest and keep them referenced until client ACK or
2738  * transaction commit.
2739  *
2740  * \param info thread info object
2741  * \param o mdt object
2742  * \param lh mdt lock handle referencing regular and PDO locks
2743  * \param decref force immediate lock releasing
2744  */
2745 void mdt_object_unlock(struct mdt_thread_info *info, struct mdt_object *o,
2746                        struct mdt_lock_handle *lh, int decref)
2747 {
2748         ENTRY;
2749
2750         mdt_save_lock(info, &lh->mlh_pdo_lh, lh->mlh_pdo_mode, decref);
2751         mdt_save_lock(info, &lh->mlh_reg_lh, lh->mlh_reg_mode, decref);
2752
2753         EXIT;
2754 }
2755
2756 struct mdt_object *mdt_object_find_lock(struct mdt_thread_info *info,
2757                                         const struct lu_fid *f,
2758                                         struct mdt_lock_handle *lh,
2759                                         __u64 ibits)
2760 {
2761         struct mdt_object *o;
2762
2763         o = mdt_object_find(info->mti_env, info->mti_mdt, f);
2764         if (!IS_ERR(o)) {
2765                 int rc;
2766
2767                 rc = mdt_object_lock(info, o, lh, ibits,
2768                                      MDT_LOCAL_LOCK);
2769                 if (rc != 0) {
2770                         mdt_object_put(info->mti_env, o);
2771                         o = ERR_PTR(rc);
2772                 }
2773         }
2774         return o;
2775 }
2776
2777 void mdt_object_unlock_put(struct mdt_thread_info * info,
2778                            struct mdt_object * o,
2779                            struct mdt_lock_handle *lh,
2780                            int decref)
2781 {
2782         mdt_object_unlock(info, o, lh, decref);
2783         mdt_object_put(info->mti_env, o);
2784 }
2785
2786 static struct mdt_handler *mdt_handler_find(__u32 opc,
2787                                             struct mdt_opc_slice *supported)
2788 {
2789         struct mdt_opc_slice *s;
2790         struct mdt_handler   *h;
2791
2792         h = NULL;
2793         for (s = supported; s->mos_hs != NULL; s++) {
2794                 if (s->mos_opc_start <= opc && opc < s->mos_opc_end) {
2795                         h = s->mos_hs + (opc - s->mos_opc_start);
2796                         if (likely(h->mh_opc != 0))
2797                                 LASSERTF(h->mh_opc == opc,
2798                                          "opcode mismatch %d != %d\n",
2799                                          h->mh_opc, opc);
2800                         else
2801                                 h = NULL; /* unsupported opc */
2802                         break;
2803                 }
2804         }
2805         return h;
2806 }
2807
2808 static int mdt_lock_resname_compat(struct mdt_device *m,
2809                                    struct ldlm_request *req)
2810 {
2811         /* XXX something... later. */
2812         return 0;
2813 }
2814
2815 static int mdt_lock_reply_compat(struct mdt_device *m, struct ldlm_reply *rep)
2816 {
2817         /* XXX something... later. */
2818         return 0;
2819 }
2820
2821 /*
2822  * Generic code handling requests that have struct mdt_body passed in:
2823  *
2824  *  - extract mdt_body from request and save it in @info, if present;
2825  *
2826  *  - create lu_object, corresponding to the fid in mdt_body, and save it in
2827  *  @info;
2828  *
2829  *  - if HABEO_CORPUS flag is set for this request type check whether object
2830  *  actually exists on storage (lu_object_exists()).
2831  *
2832  */
2833 static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
2834 {
2835         const struct mdt_body    *body;
2836         struct mdt_object        *obj;
2837         const struct lu_env      *env;
2838         struct req_capsule       *pill;
2839         int                       rc;
2840         ENTRY;
2841
2842         env = info->mti_env;
2843         pill = info->mti_pill;
2844
2845         body = info->mti_body = req_capsule_client_get(pill, &RMF_MDT_BODY);
2846         if (body == NULL)
2847                 RETURN(-EFAULT);
2848
2849         if (!(body->valid & OBD_MD_FLID))
2850                 RETURN(0);
2851
2852         if (!fid_is_sane(&body->fid1)) {
2853                 CERROR("Invalid fid: "DFID"\n", PFID(&body->fid1));
2854                 RETURN(-EINVAL);
2855         }
2856
2857         /*
2858          * Do not get size or any capa fields before we check that request
2859          * contains capa actually. There are some requests which do not, for
2860          * instance MDS_IS_SUBDIR.
2861          */
2862         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
2863             req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
2864                 mdt_set_capainfo(info, 0, &body->fid1,
2865                                  req_capsule_client_get(pill, &RMF_CAPA1));
2866
2867         obj = mdt_object_find(env, info->mti_mdt, &body->fid1);
2868         if (!IS_ERR(obj)) {
2869                 if ((flags & HABEO_CORPUS) &&
2870                     !mdt_object_exists(obj)) {
2871                         mdt_object_put(env, obj);
2872                         /* for capability renew ENOENT will be handled in
2873                          * mdt_renew_capa */
2874                         if (body->valid & OBD_MD_FLOSSCAPA)
2875                                 rc = 0;
2876                         else
2877                                 rc = -ENOENT;
2878                 } else {
2879                         info->mti_object = obj;
2880                         rc = 0;
2881                 }
2882         } else
2883                 rc = PTR_ERR(obj);
2884
2885         RETURN(rc);
2886 }
2887
2888 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags)
2889 {
2890         struct req_capsule *pill = info->mti_pill;
2891         int rc;
2892         ENTRY;
2893
2894         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT))
2895                 rc = mdt_body_unpack(info, flags);
2896         else
2897                 rc = 0;
2898
2899         if (rc == 0 && (flags & HABEO_REFERO)) {
2900                 /* Pack reply. */
2901                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
2902                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
2903                                              info->mti_body->eadatasize);
2904                 if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
2905                         req_capsule_set_size(pill, &RMF_LOGCOOKIES,
2906                                              RCL_SERVER, 0);
2907
2908                 rc = req_capsule_server_pack(pill);
2909         }
2910         RETURN(rc);
2911 }
2912
2913 static int mdt_init_capa_ctxt(const struct lu_env *env, struct mdt_device *m)
2914 {
2915         struct md_device *next = m->mdt_child;
2916
2917         return next->md_ops->mdo_init_capa_ctxt(env, next,
2918                                                 m->mdt_opts.mo_mds_capa,
2919                                                 m->mdt_capa_timeout,
2920                                                 m->mdt_capa_alg,
2921                                                 m->mdt_capa_keys);
2922 }
2923
2924 /*
2925  * Invoke handler for this request opc. Also do necessary preprocessing
2926  * (according to handler ->mh_flags), and post-processing (setting of
2927  * ->last_{xid,committed}).
2928  */
2929 static int mdt_req_handle(struct mdt_thread_info *info,
2930                           struct mdt_handler *h, struct ptlrpc_request *req)
2931 {
2932         int   rc, serious = 0;
2933         __u32 flags;
2934
2935         ENTRY;
2936
2937         LASSERT(h->mh_act != NULL);
2938         LASSERT(h->mh_opc == lustre_msg_get_opc(req->rq_reqmsg));
2939         LASSERT(current->journal_info == NULL);
2940
2941         /*
2942          * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
2943          * to put same checks into handlers like mdt_close(), mdt_reint(),
2944          * etc., without talking to mdt authors first. Checking same thing
2945          * there again is useless and returning 0 error without packing reply
2946          * is buggy! Handlers either pack reply or return error.
2947          *
2948          * We return 0 here and do not send any reply in order to emulate
2949          * network failure. Do not send any reply in case any of NET related
2950          * fail_id has occured.
2951          */
2952         if (OBD_FAIL_CHECK_ORSET(h->mh_fail_id, OBD_FAIL_ONCE))
2953                 RETURN(0);
2954
2955         rc = 0;
2956         flags = h->mh_flags;
2957         LASSERT(ergo(flags & (HABEO_CORPUS|HABEO_REFERO), h->mh_fmt != NULL));
2958
2959         if (h->mh_fmt != NULL) {
2960                 req_capsule_set(info->mti_pill, h->mh_fmt);
2961                 rc = mdt_unpack_req_pack_rep(info, flags);
2962         }
2963
2964         if (rc == 0 && flags & MUTABOR &&
2965             req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
2966                 /* should it be rq_status? */
2967                 rc = -EROFS;
2968
2969         if (rc == 0 && flags & HABEO_CLAVIS) {
2970                 struct ldlm_request *dlm_req;
2971
2972                 LASSERT(h->mh_fmt != NULL);
2973
2974                 dlm_req = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
2975                 if (dlm_req != NULL) {
2976                         if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
2977                                         LDLM_IBITS &&
2978                                      dlm_req->lock_desc.l_policy_data.\
2979                                         l_inodebits.bits == 0)) {
2980                                 /*
2981                                  * Lock without inodebits makes no sense and
2982                                  * will oops later in ldlm. If client miss to
2983                                  * set such bits, do not trigger ASSERTION.
2984                                  *
2985                                  * For liblustre flock case, it maybe zero.
2986                                  */
2987                                 rc = -EPROTO;
2988                         } else {
2989                                 if (info->mti_mdt->mdt_opts.mo_compat_resname)
2990                                         rc = mdt_lock_resname_compat(
2991                                                                 info->mti_mdt,
2992                                                                 dlm_req);
2993                                 info->mti_dlm_req = dlm_req;
2994                         }
2995                 } else {
2996                         rc = -EFAULT;
2997                 }
2998         }
2999
3000         /* capability setting changed via /proc, needs reinitialize ctxt */
3001         if (info->mti_mdt && info->mti_mdt->mdt_capa_conf) {
3002                 mdt_init_capa_ctxt(info->mti_env, info->mti_mdt);
3003                 info->mti_mdt->mdt_capa_conf = 0;
3004         }
3005
3006         if (likely(rc == 0)) {
3007                 /*
3008                  * Process request, there can be two types of rc:
3009                  * 1) errors with msg unpack/pack, other failures outside the
3010                  * operation itself. This is counted as serious errors;
3011                  * 2) errors during fs operation, should be placed in rq_status
3012                  * only
3013                  */
3014                 rc = h->mh_act(info);
3015                 if (rc == 0 &&
3016                     !req->rq_no_reply && req->rq_reply_state == NULL) {
3017                         DEBUG_REQ(D_ERROR, req, "MDT \"handler\" %s did not "
3018                                   "pack reply and returned 0 error\n",
3019                                   h->mh_name);
3020                         LBUG();
3021                 }
3022                 serious = is_serious(rc);
3023                 rc = clear_serious(rc);
3024         } else
3025                 serious = 1;
3026
3027         req->rq_status = rc;
3028
3029         /*
3030          * ELDLM_* codes which > 0 should be in rq_status only as well as
3031          * all non-serious errors.
3032          */
3033         if (rc > 0 || !serious)
3034                 rc = 0;
3035
3036         LASSERT(current->journal_info == NULL);
3037
3038         if (rc == 0 && (flags & HABEO_CLAVIS) &&
3039             info->mti_mdt->mdt_opts.mo_compat_resname) {
3040                 struct ldlm_reply *dlmrep;
3041
3042                 dlmrep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3043                 if (dlmrep != NULL)
3044                         rc = mdt_lock_reply_compat(info->mti_mdt, dlmrep);
3045         }
3046
3047         /* If we're DISCONNECTing, the mdt_export_data is already freed */
3048         if (likely(rc == 0 && req->rq_export && h->mh_opc != MDS_DISCONNECT))
3049                 target_committed_to_req(req);
3050
3051         if (unlikely(req_is_replay(req) &&
3052                      lustre_msg_get_transno(req->rq_reqmsg) == 0)) {
3053                 DEBUG_REQ(D_ERROR, req, "transno is 0 during REPLAY");
3054                 LBUG();
3055         }
3056
3057         target_send_reply(req, rc, info->mti_fail_id);
3058         RETURN(0);
3059 }
3060
3061 void mdt_lock_handle_init(struct mdt_lock_handle *lh)
3062 {
3063         lh->mlh_type = MDT_NUL_LOCK;
3064         lh->mlh_reg_lh.cookie = 0ull;
3065         lh->mlh_reg_mode = LCK_MINMODE;
3066         lh->mlh_pdo_lh.cookie = 0ull;
3067         lh->mlh_pdo_mode = LCK_MINMODE;
3068 }
3069
3070 void mdt_lock_handle_fini(struct mdt_lock_handle *lh)
3071 {
3072         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
3073         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
3074 }
3075
3076 /*
3077  * Initialize fields of struct mdt_thread_info. Other fields are left in
3078  * uninitialized state, because it's too expensive to zero out whole
3079  * mdt_thread_info (> 1K) on each request arrival.
3080  */
3081 static void mdt_thread_info_init(struct ptlrpc_request *req,
3082                                  struct mdt_thread_info *info)
3083 {
3084         int i;
3085         struct md_capainfo *ci;
3086
3087         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
3088         info->mti_pill = &req->rq_pill;
3089
3090         /* lock handle */
3091         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
3092                 mdt_lock_handle_init(&info->mti_lh[i]);
3093
3094         /* mdt device: it can be NULL while CONNECT */
3095         if (req->rq_export) {
3096                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
3097                 info->mti_exp = req->rq_export;
3098         } else
3099                 info->mti_mdt = NULL;
3100         info->mti_env = req->rq_svc_thread->t_env;
3101         ci = md_capainfo(info->mti_env);
3102         memset(ci, 0, sizeof *ci);
3103         if (req->rq_export) {
3104                 if (exp_connect_rmtclient(req->rq_export))
3105                         ci->mc_auth = LC_ID_CONVERT;
3106                 else if (req->rq_export->exp_connect_flags &
3107                          OBD_CONNECT_MDS_CAPA)
3108                         ci->mc_auth = LC_ID_PLAIN;
3109                 else
3110                         ci->mc_auth = LC_ID_NONE;
3111         }
3112
3113         info->mti_fail_id = OBD_FAIL_MDS_ALL_REPLY_NET;
3114         info->mti_transno = lustre_msg_get_transno(req->rq_reqmsg);
3115         info->mti_mos = NULL;
3116
3117         memset(&info->mti_attr, 0, sizeof(info->mti_attr));
3118         info->mti_body = NULL;
3119         info->mti_object = NULL;
3120         info->mti_dlm_req = NULL;
3121         info->mti_has_trans = 0;
3122         info->mti_cross_ref = 0;
3123         info->mti_opdata = 0;
3124         info->mti_big_lmm_used = 0;
3125
3126         /* To not check for split by default. */
3127         info->mti_spec.sp_ck_split = 0;
3128         info->mti_spec.no_create = 0;
3129 }
3130
3131 static void mdt_thread_info_fini(struct mdt_thread_info *info)
3132 {
3133         int i;
3134
3135         req_capsule_fini(info->mti_pill);
3136         if (info->mti_object != NULL) {
3137                 mdt_object_put(info->mti_env, info->mti_object);
3138                 info->mti_object = NULL;
3139         }
3140         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
3141                 mdt_lock_handle_fini(&info->mti_lh[i]);
3142         info->mti_env = NULL;
3143 }
3144
3145 static int mdt_filter_recovery_request(struct ptlrpc_request *req,
3146                                        struct obd_device *obd, int *process)
3147 {
3148         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3149         case MDS_CONNECT: /* This will never get here, but for completeness. */
3150         case OST_CONNECT: /* This will never get here, but for completeness. */
3151         case MDS_DISCONNECT:
3152         case OST_DISCONNECT:
3153                *process = 1;
3154                RETURN(0);
3155
3156         case MDS_CLOSE:
3157         case MDS_DONE_WRITING:
3158         case MDS_SYNC: /* used in unmounting */
3159         case OBD_PING:
3160         case MDS_REINT:
3161         case SEQ_QUERY:
3162         case FLD_QUERY:
3163         case LDLM_ENQUEUE:
3164                 *process = target_queue_recovery_request(req, obd);
3165                 RETURN(0);
3166
3167         default:
3168                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
3169                 *process = -EAGAIN;
3170                 RETURN(0);
3171         }
3172 }
3173
3174 /*
3175  * Handle recovery. Return:
3176  *        +1: continue request processing;
3177  *       -ve: abort immediately with the given error code;
3178  *         0: send reply with error code in req->rq_status;
3179  */
3180 static int mdt_recovery(struct mdt_thread_info *info)
3181 {
3182         struct ptlrpc_request *req = mdt_info_req(info);
3183         struct obd_device *obd;
3184
3185         ENTRY;
3186
3187         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3188         case MDS_CONNECT:
3189         case SEC_CTX_INIT:
3190         case SEC_CTX_INIT_CONT:
3191         case SEC_CTX_FINI:
3192                 {
3193 #if 0
3194                         int rc;
3195
3196                         rc = mdt_handle_idmap(info);
3197                         if (rc)
3198                                 RETURN(rc);
3199                         else
3200 #endif
3201                                 RETURN(+1);
3202                 }
3203         }
3204
3205         if (unlikely(!class_connected_export(req->rq_export))) {
3206                 CERROR("operation %d on unconnected MDS from %s\n",
3207                        lustre_msg_get_opc(req->rq_reqmsg),
3208                        libcfs_id2str(req->rq_peer));
3209                 /* FIXME: For CMD cleanup, when mds_B stop, the req from
3210                  * mds_A will get -ENOTCONN(especially for ping req),
3211                  * which will cause that mds_A deactive timeout, then when
3212                  * mds_A cleanup, the cleanup process will be suspended since
3213                  * deactive timeout is not zero.
3214                  */
3215                 req->rq_status = -ENOTCONN;
3216                 target_send_reply(req, -ENOTCONN, info->mti_fail_id);
3217                 RETURN(0);
3218         }
3219
3220         /* sanity check: if the xid matches, the request must be marked as a
3221          * resent or replayed */
3222         if (req_xid_is_last(req)) {
3223                 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
3224                       (MSG_RESENT | MSG_REPLAY))) {
3225                         DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches last_xid, "
3226                                   "expected REPLAY or RESENT flag (%x)", req->rq_xid,
3227                                   lustre_msg_get_flags(req->rq_reqmsg));
3228                         LBUG();
3229                         req->rq_status = -ENOTCONN;
3230                         RETURN(-ENOTCONN);
3231                 }
3232         }
3233
3234         /* else: note the opposite is not always true; a RESENT req after a
3235          * failover will usually not match the last_xid, since it was likely
3236          * never committed. A REPLAYed request will almost never match the
3237          * last xid, however it could for a committed, but still retained,
3238          * open. */
3239
3240         obd = req->rq_export->exp_obd;
3241
3242         /* Check for aborted recovery... */
3243         if (unlikely(obd->obd_recovering)) {
3244                 int rc;
3245                 int should_process;
3246                 DEBUG_REQ(D_INFO, req, "Got new replay");
3247                 rc = mdt_filter_recovery_request(req, obd, &should_process);
3248                 if (rc != 0 || !should_process)
3249                         RETURN(rc);
3250                 else if (should_process < 0) {
3251                         req->rq_status = should_process;
3252                         rc = ptlrpc_error(req);
3253                         RETURN(rc);
3254                 }
3255         }
3256         RETURN(+1);
3257 }
3258
3259 static int mdt_msg_check_version(struct lustre_msg *msg)
3260 {
3261         int rc;
3262
3263         switch (lustre_msg_get_opc(msg)) {
3264         case MDS_CONNECT:
3265         case MDS_DISCONNECT:
3266         case OBD_PING:
3267         case SEC_CTX_INIT:
3268         case SEC_CTX_INIT_CONT:
3269         case SEC_CTX_FINI:
3270         case OBD_IDX_READ:
3271                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
3272                 if (rc)
3273                         CERROR("bad opc %u version %08x, expecting %08x\n",
3274                                lustre_msg_get_opc(msg),
3275                                lustre_msg_get_version(msg),
3276                                LUSTRE_OBD_VERSION);
3277                 break;
3278         case MDS_GETSTATUS:
3279         case MDS_GETATTR:
3280         case MDS_GETATTR_NAME:
3281         case MDS_STATFS:
3282         case MDS_READPAGE:
3283         case MDS_WRITEPAGE:
3284         case MDS_IS_SUBDIR:
3285         case MDS_REINT:
3286         case MDS_CLOSE:
3287         case MDS_DONE_WRITING:
3288         case MDS_PIN:
3289         case MDS_SYNC:
3290         case MDS_GETXATTR:
3291         case MDS_SETXATTR:
3292         case MDS_SET_INFO:
3293         case MDS_GET_INFO:
3294         case MDS_QUOTACHECK:
3295         case MDS_QUOTACTL:
3296         case QUOTA_DQACQ:
3297         case QUOTA_DQREL:
3298         case SEQ_QUERY:
3299         case FLD_QUERY:
3300                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
3301                 if (rc)
3302                         CERROR("bad opc %u version %08x, expecting %08x\n",
3303                                lustre_msg_get_opc(msg),
3304                                lustre_msg_get_version(msg),
3305                                LUSTRE_MDS_VERSION);
3306                 break;
3307         case LDLM_ENQUEUE:
3308         case LDLM_CONVERT:
3309         case LDLM_BL_CALLBACK:
3310         case LDLM_CP_CALLBACK:
3311                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
3312                 if (rc)
3313                         CERROR("bad opc %u version %08x, expecting %08x\n",
3314                                lustre_msg_get_opc(msg),
3315                                lustre_msg_get_version(msg),
3316                                LUSTRE_DLM_VERSION);
3317                 break;
3318         case OBD_LOG_CANCEL:
3319         case LLOG_ORIGIN_HANDLE_CREATE:
3320         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
3321         case LLOG_ORIGIN_HANDLE_READ_HEADER:
3322         case LLOG_ORIGIN_HANDLE_CLOSE:
3323         case LLOG_ORIGIN_HANDLE_DESTROY:
3324         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
3325         case LLOG_CATINFO:
3326                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
3327                 if (rc)
3328                         CERROR("bad opc %u version %08x, expecting %08x\n",
3329                                lustre_msg_get_opc(msg),
3330                                lustre_msg_get_version(msg),
3331                                LUSTRE_LOG_VERSION);
3332                 break;
3333         default:
3334                 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
3335                 rc = -ENOTSUPP;
3336         }
3337         return rc;
3338 }
3339
3340 static int mdt_handle0(struct ptlrpc_request *req,
3341                        struct mdt_thread_info *info,
3342                        struct mdt_opc_slice *supported)
3343 {
3344         struct mdt_handler *h;
3345         struct lustre_msg  *msg;
3346         int                 rc;
3347
3348         ENTRY;
3349
3350         if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_MDS_ALL_REQUEST_NET, OBD_FAIL_ONCE))
3351                 RETURN(0);
3352
3353         LASSERT(current->journal_info == NULL);
3354
3355         msg = req->rq_reqmsg;
3356         rc = mdt_msg_check_version(msg);
3357         if (likely(rc == 0)) {
3358                 rc = mdt_recovery(info);
3359                 if (likely(rc == +1)) {
3360                         h = mdt_handler_find(lustre_msg_get_opc(msg),
3361                                              supported);
3362                         if (likely(h != NULL)) {
3363                                 rc = mdt_req_handle(info, h, req);
3364                         } else {
3365                                 CERROR("The unsupported opc: 0x%x\n",
3366                                        lustre_msg_get_opc(msg) );
3367                                 req->rq_status = -ENOTSUPP;
3368                                 rc = ptlrpc_error(req);
3369                                 RETURN(rc);
3370                         }
3371                 }
3372         } else
3373                 CERROR(LUSTRE_MDT_NAME" drops mal-formed request\n");
3374         RETURN(rc);
3375 }
3376
3377 /*
3378  * MDT handler function called by ptlrpc service thread when request comes.
3379  *
3380  * XXX common "target" functionality should be factored into separate module
3381  * shared by mdt, ost and stand-alone services like fld.
3382  */
3383 static int mdt_handle_common(struct ptlrpc_request *req,
3384                              struct mdt_opc_slice *supported)
3385 {
3386         struct lu_env          *env;
3387         struct mdt_thread_info *info;
3388         int                     rc;
3389         ENTRY;
3390
3391         env = req->rq_svc_thread->t_env;
3392         LASSERT(env != NULL);
3393         LASSERT(env->le_ses != NULL);
3394         LASSERT(env->le_ctx.lc_thread == req->rq_svc_thread);
3395         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
3396         LASSERT(info != NULL);
3397
3398         mdt_thread_info_init(req, info);
3399
3400         rc = mdt_handle0(req, info, supported);
3401
3402         mdt_thread_info_fini(info);
3403         RETURN(rc);
3404 }
3405
3406 /*
3407  * This is called from recovery code as handler of _all_ RPC types, FLD and SEQ
3408  * as well.
3409  */
3410 int mdt_recovery_handle(struct ptlrpc_request *req)
3411 {
3412         int rc;
3413         ENTRY;
3414
3415         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3416         case FLD_QUERY:
3417                 rc = mdt_handle_common(req, mdt_fld_handlers);
3418                 break;
3419         case SEQ_QUERY:
3420                 rc = mdt_handle_common(req, mdt_seq_handlers);
3421                 break;
3422         default:
3423                 rc = mdt_handle_common(req, mdt_regular_handlers);
3424                 break;
3425         }
3426
3427         RETURN(rc);
3428 }
3429
3430 static int mdt_regular_handle(struct ptlrpc_request *req)
3431 {
3432         return mdt_handle_common(req, mdt_regular_handlers);
3433 }
3434
3435 static int mdt_readpage_handle(struct ptlrpc_request *req)
3436 {
3437         return mdt_handle_common(req, mdt_readpage_handlers);
3438 }
3439
3440 static int mdt_xmds_handle(struct ptlrpc_request *req)
3441 {
3442         return mdt_handle_common(req, mdt_xmds_handlers);
3443 }
3444
3445 static int mdt_mdsc_handle(struct ptlrpc_request *req)
3446 {
3447         return mdt_handle_common(req, mdt_seq_handlers);
3448 }
3449
3450 static int mdt_mdss_handle(struct ptlrpc_request *req)
3451 {
3452         return mdt_handle_common(req, mdt_seq_handlers);
3453 }
3454
3455 static int mdt_dtss_handle(struct ptlrpc_request *req)
3456 {
3457         return mdt_handle_common(req, mdt_seq_handlers);
3458 }
3459
3460 static int mdt_fld_handle(struct ptlrpc_request *req)
3461 {
3462         return mdt_handle_common(req, mdt_fld_handlers);
3463 }
3464
3465 enum mdt_it_code {
3466         MDT_IT_OPEN,
3467         MDT_IT_OCREAT,
3468         MDT_IT_CREATE,
3469         MDT_IT_GETATTR,
3470         MDT_IT_READDIR,
3471         MDT_IT_LOOKUP,
3472         MDT_IT_UNLINK,
3473         MDT_IT_TRUNC,
3474         MDT_IT_GETXATTR,
3475         MDT_IT_LAYOUT,
3476         MDT_IT_QUOTA,
3477         MDT_IT_NR
3478 };
3479
3480 static int mdt_intent_getattr(enum mdt_it_code opcode,
3481                               struct mdt_thread_info *info,
3482                               struct ldlm_lock **,
3483                               int);
3484 static int mdt_intent_reint(enum mdt_it_code opcode,
3485                             struct mdt_thread_info *info,
3486                             struct ldlm_lock **,
3487                             int);
3488
3489 static struct mdt_it_flavor {
3490         const struct req_format *it_fmt;
3491         __u32                    it_flags;
3492         int                    (*it_act)(enum mdt_it_code ,
3493                                          struct mdt_thread_info *,
3494                                          struct ldlm_lock **,
3495                                          int);
3496         long                     it_reint;
3497 } mdt_it_flavor[] = {
3498         [MDT_IT_OPEN]     = {
3499                 .it_fmt   = &RQF_LDLM_INTENT,
3500                 /*.it_flags = HABEO_REFERO,*/
3501                 .it_flags = 0,
3502                 .it_act   = mdt_intent_reint,
3503                 .it_reint = REINT_OPEN
3504         },
3505         [MDT_IT_OCREAT]   = {
3506                 .it_fmt   = &RQF_LDLM_INTENT,
3507                 .it_flags = MUTABOR,
3508                 .it_act   = mdt_intent_reint,
3509                 .it_reint = REINT_OPEN
3510         },
3511         [MDT_IT_CREATE]   = {
3512                 .it_fmt   = &RQF_LDLM_INTENT,
3513                 .it_flags = MUTABOR,
3514                 .it_act   = mdt_intent_reint,
3515                 .it_reint = REINT_CREATE
3516         },
3517         [MDT_IT_GETATTR]  = {
3518                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3519                 .it_flags = HABEO_REFERO,
3520                 .it_act   = mdt_intent_getattr
3521         },
3522         [MDT_IT_READDIR]  = {
3523                 .it_fmt   = NULL,
3524                 .it_flags = 0,
3525                 .it_act   = NULL
3526         },
3527         [MDT_IT_LOOKUP]   = {
3528                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3529                 .it_flags = HABEO_REFERO,
3530                 .it_act   = mdt_intent_getattr
3531         },
3532         [MDT_IT_UNLINK]   = {
3533                 .it_fmt   = &RQF_LDLM_INTENT_UNLINK,
3534                 .it_flags = MUTABOR,
3535                 .it_act   = NULL,
3536                 .it_reint = REINT_UNLINK
3537         },
3538         [MDT_IT_TRUNC]    = {
3539                 .it_fmt   = NULL,
3540                 .it_flags = MUTABOR,
3541                 .it_act   = NULL
3542         },
3543         [MDT_IT_GETXATTR] = {
3544                 .it_fmt   = NULL,
3545                 .it_flags = 0,
3546                 .it_act   = NULL
3547         },
3548         [MDT_IT_LAYOUT] = {
3549                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3550                 .it_flags = HABEO_REFERO,
3551                 .it_act   = mdt_intent_getattr
3552         }
3553 };
3554
3555 int mdt_intent_lock_replace(struct mdt_thread_info *info,
3556                             struct ldlm_lock **lockp,
3557                             struct ldlm_lock *new_lock,
3558                             struct mdt_lock_handle *lh,
3559                             int flags)
3560 {
3561         struct ptlrpc_request  *req = mdt_info_req(info);
3562         struct ldlm_lock       *lock = *lockp;
3563
3564         /*
3565          * Get new lock only for cases when possible resent did not find any
3566          * lock.
3567          */
3568         if (new_lock == NULL)
3569                 new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
3570
3571         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY)) {
3572                 lh->mlh_reg_lh.cookie = 0;
3573                 RETURN(0);
3574         }
3575
3576         LASSERTF(new_lock != NULL,
3577                  "lockh "LPX64"\n", lh->mlh_reg_lh.cookie);
3578
3579         /*
3580          * If we've already given this lock to a client once, then we should
3581          * have no readers or writers.  Otherwise, we should have one reader
3582          * _or_ writer ref (which will be zeroed below) before returning the
3583          * lock to a client.
3584          */
3585         if (new_lock->l_export == req->rq_export) {
3586                 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
3587         } else {
3588                 LASSERT(new_lock->l_export == NULL);
3589                 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
3590         }
3591
3592         *lockp = new_lock;
3593
3594         if (new_lock->l_export == req->rq_export) {
3595                 /*
3596                  * Already gave this to the client, which means that we
3597                  * reconstructed a reply.
3598                  */
3599                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
3600                         MSG_RESENT);
3601                 lh->mlh_reg_lh.cookie = 0;
3602                 RETURN(ELDLM_LOCK_REPLACED);
3603         }
3604
3605         /*
3606          * Fixup the lock to be given to the client.
3607          */
3608         lock_res_and_lock(new_lock);
3609         /* Zero new_lock->l_readers and new_lock->l_writers without triggering
3610          * possible blocking AST. */
3611         while (new_lock->l_readers > 0) {
3612                 lu_ref_del(&new_lock->l_reference, "reader", new_lock);
3613                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3614                 new_lock->l_readers--;
3615         }
3616         while (new_lock->l_writers > 0) {
3617                 lu_ref_del(&new_lock->l_reference, "writer", new_lock);
3618                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3619                 new_lock->l_writers--;
3620         }
3621
3622         new_lock->l_export = class_export_lock_get(req->rq_export, new_lock);
3623         new_lock->l_blocking_ast = lock->l_blocking_ast;
3624         new_lock->l_completion_ast = lock->l_completion_ast;
3625         new_lock->l_remote_handle = lock->l_remote_handle;
3626         new_lock->l_flags &= ~LDLM_FL_LOCAL;
3627
3628         unlock_res_and_lock(new_lock);
3629
3630         cfs_hash_add(new_lock->l_export->exp_lock_hash,
3631                      &new_lock->l_remote_handle,
3632                      &new_lock->l_exp_hash);
3633
3634         LDLM_LOCK_RELEASE(new_lock);
3635         lh->mlh_reg_lh.cookie = 0;
3636
3637         RETURN(ELDLM_LOCK_REPLACED);
3638 }
3639
3640 static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
3641                                     struct ldlm_lock *new_lock,
3642                                     struct ldlm_lock **old_lock,
3643                                     struct mdt_lock_handle *lh)
3644 {
3645         struct ptlrpc_request  *req = mdt_info_req(info);
3646         struct obd_export      *exp = req->rq_export;
3647         struct lustre_handle    remote_hdl;
3648         struct ldlm_request    *dlmreq;
3649         struct ldlm_lock       *lock;
3650
3651         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
3652                 return;
3653
3654         dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
3655         remote_hdl = dlmreq->lock_handle[0];
3656
3657         /* In the function below, .hs_keycmp resolves to
3658          * ldlm_export_lock_keycmp() */
3659         /* coverity[overrun-buffer-val] */
3660         lock = cfs_hash_lookup(exp->exp_lock_hash, &remote_hdl);
3661         if (lock) {
3662                 if (lock != new_lock) {
3663                         lh->mlh_reg_lh.cookie = lock->l_handle.h_cookie;
3664                         lh->mlh_reg_mode = lock->l_granted_mode;
3665
3666                         LDLM_DEBUG(lock, "Restoring lock cookie");
3667                         DEBUG_REQ(D_DLMTRACE, req,
3668                                   "restoring lock cookie "LPX64,
3669                                   lh->mlh_reg_lh.cookie);
3670                         if (old_lock)
3671                                 *old_lock = LDLM_LOCK_GET(lock);
3672                         cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3673                         return;
3674                 }
3675
3676                 cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3677         }
3678
3679         /*
3680          * If the xid matches, then we know this is a resent request, and allow
3681          * it. (It's probably an OPEN, for which we don't send a lock.
3682          */
3683         if (req_xid_is_last(req))
3684                 return;
3685
3686         /*
3687          * This remote handle isn't enqueued, so we never received or processed
3688          * this request.  Clear MSG_RESENT, because it can be handled like any
3689          * normal request now.
3690          */
3691         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
3692
3693         DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
3694                   remote_hdl.cookie);
3695 }
3696
3697 static int mdt_intent_getattr(enum mdt_it_code opcode,
3698                               struct mdt_thread_info *info,
3699                               struct ldlm_lock **lockp,
3700                               int flags)
3701 {
3702         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3703         struct ldlm_lock       *new_lock = NULL;
3704         __u64                   child_bits;
3705         struct ldlm_reply      *ldlm_rep;
3706         struct ptlrpc_request  *req;
3707         struct mdt_body        *reqbody;
3708         struct mdt_body        *repbody;
3709         int                     rc, rc2;
3710         ENTRY;
3711
3712         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
3713         LASSERT(reqbody);
3714
3715         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
3716         LASSERT(repbody);
3717
3718         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
3719         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
3720         repbody->eadatasize = 0;
3721         repbody->aclsize = 0;
3722
3723         switch (opcode) {
3724         case MDT_IT_LOOKUP:
3725                 child_bits = MDS_INODELOCK_LOOKUP;
3726                 break;
3727         case MDT_IT_GETATTR:
3728                 child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
3729                 break;
3730         case MDT_IT_LAYOUT: {
3731                 static int printed = 0;
3732
3733                 if (!printed) {
3734                         CERROR("layout lock not supported by this version\n");
3735                         printed = 1;
3736                 }
3737                 GOTO(out_shrink, rc = -EINVAL);
3738                 break;
3739         }
3740         default:
3741                 CERROR("Unsupported intent (%d)\n", opcode);
3742                 GOTO(out_shrink, rc = -EINVAL);
3743         }
3744
3745         rc = mdt_init_ucred(info, reqbody);
3746         if (rc)
3747                 GOTO(out_shrink, rc);
3748
3749         req = info->mti_pill->rc_req;
3750         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3751         mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
3752
3753         /* Get lock from request for possible resent case. */
3754         mdt_intent_fixup_resent(info, *lockp, &new_lock, lhc);
3755
3756         ldlm_rep->lock_policy_res2 =
3757                 mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
3758
3759         if (mdt_get_disposition(ldlm_rep, DISP_LOOKUP_NEG))
3760                 ldlm_rep->lock_policy_res2 = 0;
3761         if (!mdt_get_disposition(ldlm_rep, DISP_LOOKUP_POS) ||
3762             ldlm_rep->lock_policy_res2) {
3763                 lhc->mlh_reg_lh.cookie = 0ull;
3764                 GOTO(out_ucred, rc = ELDLM_LOCK_ABORTED);
3765         }
3766
3767         rc = mdt_intent_lock_replace(info, lockp, new_lock, lhc, flags);
3768         EXIT;
3769 out_ucred:
3770         mdt_exit_ucred(info);
3771 out_shrink:
3772         mdt_client_compatibility(info);
3773         rc2 = mdt_fix_reply(info);
3774         if (rc == 0)
3775                 rc = rc2;
3776         return rc;
3777 }
3778
3779 static int mdt_intent_reint(enum mdt_it_code opcode,
3780                             struct mdt_thread_info *info,
3781                             struct ldlm_lock **lockp,
3782                             int flags)
3783 {
3784         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3785         struct ldlm_reply      *rep = NULL;
3786         long                    opc;
3787         int                     rc;
3788
3789         static const struct req_format *intent_fmts[REINT_MAX] = {
3790                 [REINT_CREATE]  = &RQF_LDLM_INTENT_CREATE,
3791                 [REINT_OPEN]    = &RQF_LDLM_INTENT_OPEN
3792         };
3793
3794         ENTRY;
3795
3796         opc = mdt_reint_opcode(info, intent_fmts);
3797         if (opc < 0)
3798                 RETURN(opc);
3799
3800         if (mdt_it_flavor[opcode].it_reint != opc) {
3801                 CERROR("Reint code %ld doesn't match intent: %d\n",
3802                        opc, opcode);
3803                 RETURN(err_serious(-EPROTO));
3804         }
3805
3806         /* Get lock from request for possible resent case. */
3807         mdt_intent_fixup_resent(info, *lockp, NULL, lhc);
3808
3809         rc = mdt_reint_internal(info, lhc, opc);
3810
3811         /* Check whether the reply has been packed successfully. */
3812         if (mdt_info_req(info)->rq_repmsg != NULL)
3813                 rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3814         if (rep == NULL)
3815                 RETURN(err_serious(-EFAULT));
3816
3817         /* MDC expects this in any case */
3818         if (rc != 0)
3819                 mdt_set_disposition(info, rep, DISP_LOOKUP_EXECD);
3820
3821         /* Cross-ref case, the lock should be returned to the client */
3822         if (rc == -EREMOTE) {
3823                 LASSERT(lustre_handle_is_used(&lhc->mlh_reg_lh));
3824                 rep->lock_policy_res2 = 0;
3825                 rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3826                 RETURN(rc);
3827         }
3828         rep->lock_policy_res2 = clear_serious(rc);
3829
3830         if (rep->lock_policy_res2 == -ENOENT &&
3831             mdt_get_disposition(rep, DISP_LOOKUP_NEG))
3832                 rep->lock_policy_res2 = 0;
3833
3834         if (rc == -ENOTCONN || rc == -ENODEV ||
3835             rc == -EOVERFLOW) { /**< if VBR failure then return error */
3836                 /*
3837                  * If it is the disconnect error (ENODEV & ENOCONN), the error
3838                  * will be returned by rq_status, and client at ptlrpc layer
3839                  * will detect this, then disconnect, reconnect the import
3840                  * immediately, instead of impacting the following the rpc.
3841                  */
3842                 lhc->mlh_reg_lh.cookie = 0ull;
3843                 RETURN(rc);
3844         } else {
3845                 /*
3846                  * For other cases, the error will be returned by intent.
3847                  * and client will retrieve the result from intent.
3848                  */
3849                  /*
3850                   * FIXME: when open lock is finished, that should be
3851                   * checked here.
3852                   */
3853                 if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
3854                         LASSERTF(rc == 0, "Error occurred but lock handle "
3855                                  "is still in use\n");
3856                         rep->lock_policy_res2 = 0;
3857                         rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3858                         RETURN(rc);
3859                 } else {
3860                         lhc->mlh_reg_lh.cookie = 0ull;
3861                         RETURN(ELDLM_LOCK_ABORTED);
3862                 }
3863         }
3864 }
3865
3866 static int mdt_intent_code(long itcode)
3867 {
3868         int rc;
3869
3870         switch(itcode) {
3871         case IT_OPEN:
3872                 rc = MDT_IT_OPEN;
3873                 break;
3874         case IT_OPEN|IT_CREAT:
3875                 rc = MDT_IT_OCREAT;
3876                 break;
3877         case IT_CREAT:
3878                 rc = MDT_IT_CREATE;
3879                 break;
3880         case IT_READDIR:
3881                 rc = MDT_IT_READDIR;
3882                 break;
3883         case IT_GETATTR:
3884                 rc = MDT_IT_GETATTR;
3885                 break;
3886         case IT_LOOKUP:
3887                 rc = MDT_IT_LOOKUP;
3888                 break;
3889         case IT_UNLINK:
3890                 rc = MDT_IT_UNLINK;
3891                 break;
3892         case IT_TRUNC:
3893                 rc = MDT_IT_TRUNC;
3894                 break;
3895         case IT_GETXATTR:
3896                 rc = MDT_IT_GETXATTR;
3897                 break;
3898         case IT_LAYOUT:
3899                 rc = MDT_IT_LAYOUT;
3900                 break;
3901         case IT_QUOTA_DQACQ:
3902         case IT_QUOTA_CONN:
3903                 rc = MDT_IT_QUOTA;
3904                 break;
3905         default:
3906                 CERROR("Unknown intent opcode: %ld\n", itcode);
3907                 rc = -EINVAL;
3908                 break;
3909         }
3910         return rc;
3911 }
3912
3913 static int mdt_intent_opc(long itopc, struct mdt_thread_info *info,
3914                           struct ldlm_lock **lockp, int flags)
3915 {
3916         struct req_capsule   *pill;
3917         struct mdt_it_flavor *flv;
3918         int opc;
3919         int rc;
3920         ENTRY;
3921
3922         opc = mdt_intent_code(itopc);
3923         if (opc < 0)
3924                 RETURN(-EINVAL);
3925
3926         pill = info->mti_pill;
3927
3928         if (opc == MDT_IT_QUOTA) {
3929                 struct lu_device *qmt = info->mti_mdt->mdt_qmt_dev;
3930
3931                 if (qmt == NULL)
3932                         RETURN(-EOPNOTSUPP);
3933
3934                 /* pass the request to quota master */
3935                 rc = qmt_hdls.qmth_intent_policy(info->mti_env, qmt,
3936                                                  mdt_info_req(info), lockp,
3937                                                  flags);
3938                 RETURN(rc);
3939         }
3940
3941         flv  = &mdt_it_flavor[opc];
3942         if (flv->it_fmt != NULL)
3943                 req_capsule_extend(pill, flv->it_fmt);
3944
3945         rc = mdt_unpack_req_pack_rep(info, flv->it_flags);
3946         if (rc == 0) {
3947                 struct ptlrpc_request *req = mdt_info_req(info);
3948                 if (flv->it_flags & MUTABOR &&
3949                     req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
3950                         RETURN(-EROFS);
3951         }
3952         if (rc == 0 && flv->it_act != NULL) {
3953                 /* execute policy */
3954                 rc = flv->it_act(opc, info, lockp, flags);
3955         } else {
3956                 rc = -EOPNOTSUPP;
3957         }
3958         RETURN(rc);
3959 }
3960
3961 static int mdt_intent_policy(struct ldlm_namespace *ns,
3962                              struct ldlm_lock **lockp, void *req_cookie,
3963                              ldlm_mode_t mode, int flags, void *data)
3964 {
3965         struct mdt_thread_info *info;
3966         struct ptlrpc_request  *req  =  req_cookie;
3967         struct ldlm_intent     *it;
3968         struct req_capsule     *pill;
3969         int rc;
3970
3971         ENTRY;
3972
3973         LASSERT(req != NULL);
3974
3975         info = lu_context_key_get(&req->rq_svc_thread->t_env->le_ctx,
3976                                   &mdt_thread_key);
3977         LASSERT(info != NULL);
3978         pill = info->mti_pill;
3979         LASSERT(pill->rc_req == req);
3980
3981         if (req->rq_reqmsg->lm_bufcount > DLM_INTENT_IT_OFF) {
3982                 req_capsule_extend(pill, &RQF_LDLM_INTENT_BASIC);
3983                 it = req_capsule_client_get(pill, &RMF_LDLM_INTENT);
3984                 if (it != NULL) {
3985                         rc = mdt_intent_opc(it->opc, info, lockp, flags);
3986                         if (rc == 0)
3987                                 rc = ELDLM_OK;
3988
3989                         /* Lock without inodebits makes no sense and will oops
3990                          * later in ldlm. Let's check it now to see if we have
3991                          * ibits corrupted somewhere in mdt_intent_opc().
3992                          * The case for client miss to set ibits has been
3993                          * processed by others. */
3994                         LASSERT(ergo(info->mti_dlm_req->lock_desc.l_resource.\
3995                                         lr_type == LDLM_IBITS,
3996                                      info->mti_dlm_req->lock_desc.\
3997                                         l_policy_data.l_inodebits.bits != 0));
3998                 } else
3999                         rc = err_serious(-EFAULT);
4000         } else {
4001                 /* No intent was provided */
4002                 LASSERT(pill->rc_fmt == &RQF_LDLM_ENQUEUE);
4003                 rc = req_capsule_server_pack(pill);
4004                 if (rc)
4005                         rc = err_serious(rc);
4006         }
4007         RETURN(rc);
4008 }
4009
4010 static int mdt_seq_fini(const struct lu_env *env,
4011                         struct mdt_device *m)
4012 {
4013         struct md_site *ms = mdt_md_site(m);
4014         ENTRY;
4015
4016         if (ms != NULL) {
4017                 if (ms->ms_server_seq) {
4018                         seq_server_fini(ms->ms_server_seq, env);
4019                         OBD_FREE_PTR(ms->ms_server_seq);
4020                         ms->ms_server_seq = NULL;
4021         }
4022
4023                 if (ms->ms_control_seq) {
4024                         seq_server_fini(ms->ms_control_seq, env);
4025                         OBD_FREE_PTR(ms->ms_control_seq);
4026                         ms->ms_control_seq = NULL;
4027         }
4028
4029                 if (ms->ms_client_seq) {
4030                         seq_client_fini(ms->ms_client_seq);
4031                         OBD_FREE_PTR(ms->ms_client_seq);
4032                         ms->ms_client_seq = NULL;
4033                 }
4034         }
4035
4036         RETURN(0);
4037 }
4038
4039 static int mdt_seq_init(const struct lu_env *env,
4040                         const char *uuid,
4041                         struct mdt_device *m)
4042 {
4043         struct md_site *ms;
4044         char *prefix;
4045         int rc;
4046         ENTRY;
4047
4048         ms = mdt_md_site(m);
4049
4050         /*
4051          * This is sequence-controller node. Init seq-controller server on local
4052          * MDT.
4053          */
4054         if (ms->ms_node_id == 0) {
4055                 LASSERT(ms->ms_control_seq == NULL);
4056
4057                 OBD_ALLOC_PTR(ms->ms_control_seq);
4058                 if (ms->ms_control_seq == NULL)
4059                         RETURN(-ENOMEM);
4060
4061                 rc = seq_server_init(ms->ms_control_seq,
4062                                      m->mdt_bottom, uuid,
4063                                      LUSTRE_SEQ_CONTROLLER,
4064                                      ms,
4065                                      env);
4066
4067                 if (rc)
4068                         GOTO(out_seq_fini, rc);
4069
4070                 OBD_ALLOC_PTR(ms->ms_client_seq);
4071                 if (ms->ms_client_seq == NULL)
4072                         GOTO(out_seq_fini, rc = -ENOMEM);
4073
4074                 OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
4075                 if (prefix == NULL) {
4076                         OBD_FREE_PTR(ms->ms_client_seq);
4077                         GOTO(out_seq_fini, rc = -ENOMEM);
4078                 }
4079
4080                 snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
4081                          uuid);
4082
4083                 /*
4084                  * Init seq-controller client after seq-controller server is
4085                  * ready. Pass ms->ms_control_seq to it for direct talking.
4086                  */
4087                 rc = seq_client_init(ms->ms_client_seq, NULL,
4088                                      LUSTRE_SEQ_METADATA, prefix,
4089                                      ms->ms_control_seq);
4090                 OBD_FREE(prefix, MAX_OBD_NAME + 5);
4091
4092                 if (rc)
4093                         GOTO(out_seq_fini, rc);
4094         }
4095
4096         /* Init seq-server on local MDT */
4097         LASSERT(ms->ms_server_seq == NULL);
4098
4099         OBD_ALLOC_PTR(ms->ms_server_seq);
4100         if (ms->ms_server_seq == NULL)
4101                 GOTO(out_seq_fini, rc = -ENOMEM);
4102
4103         rc = seq_server_init(ms->ms_server_seq,
4104                              m->mdt_bottom, uuid,
4105                              LUSTRE_SEQ_SERVER,
4106                              ms,
4107                              env);
4108         if (rc)
4109                 GOTO(out_seq_fini, rc = -ENOMEM);
4110
4111         /* Assign seq-controller client to local seq-server. */
4112         if (ms->ms_node_id == 0) {
4113                 LASSERT(ms->ms_client_seq != NULL);
4114
4115                 rc = seq_server_set_cli(ms->ms_server_seq,
4116                                         ms->ms_client_seq,
4117                                         env);
4118         }
4119
4120         EXIT;
4121 out_seq_fini:
4122         if (rc)
4123                 mdt_seq_fini(env, m);
4124
4125         return rc;
4126 }
4127 /*
4128  * Init client sequence manager which is used by local MDS to talk to sequence
4129  * controller on remote node.
4130  */
4131 static int mdt_seq_init_cli(const struct lu_env *env,
4132                             struct mdt_device *m,
4133                             struct lustre_cfg *cfg)
4134 {
4135         struct md_site    *ms = mdt_md_site(m);
4136         struct obd_device *mdc;
4137         struct obd_uuid   *uuidp, *mdcuuidp;
4138         char              *uuid_str, *mdc_uuid_str;
4139         int                rc;
4140         int                index;
4141         struct mdt_thread_info *info;
4142         char *p, *index_string = lustre_cfg_string(cfg, 2);
4143         ENTRY;
4144
4145         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4146         uuidp = &info->mti_u.uuid[0];
4147         mdcuuidp = &info->mti_u.uuid[1];
4148
4149         LASSERT(index_string);
4150
4151         index = simple_strtol(index_string, &p, 10);
4152         if (*p) {
4153                 CERROR("Invalid index in lustre_cgf, offset 2\n");
4154                 RETURN(-EINVAL);
4155         }
4156
4157         /* check if this is adding the first MDC and controller is not yet
4158          * initialized. */
4159         if (index != 0 || ms->ms_client_seq)
4160                 RETURN(0);
4161
4162         uuid_str = lustre_cfg_string(cfg, 1);
4163         mdc_uuid_str = lustre_cfg_string(cfg, 4);
4164         obd_str2uuid(uuidp, uuid_str);
4165         obd_str2uuid(mdcuuidp, mdc_uuid_str);
4166
4167         mdc = class_find_client_obd(uuidp, LUSTRE_MDC_NAME, mdcuuidp);
4168         if (!mdc) {
4169                 CERROR("can't find controller MDC by uuid %s\n",
4170                        uuid_str);
4171                 rc = -ENOENT;
4172         } else if (!mdc->obd_set_up) {
4173                 CERROR("target %s not set up\n", mdc->obd_name);
4174                 rc = -EINVAL;
4175         } else {
4176                 LASSERT(ms->ms_control_exp);
4177                 OBD_ALLOC_PTR(ms->ms_client_seq);
4178                 if (ms->ms_client_seq != NULL) {
4179                         char *prefix;
4180
4181                         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
4182                         if (!prefix)
4183                                 RETURN(-ENOMEM);
4184
4185                         snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
4186                                  mdc->obd_name);
4187
4188                         rc = seq_client_init(ms->ms_client_seq,
4189                                              ms->ms_control_exp,
4190                                              LUSTRE_SEQ_METADATA,
4191                                              prefix, NULL);
4192                         OBD_FREE(prefix, MAX_OBD_NAME + 5);
4193                 } else
4194                         rc = -ENOMEM;
4195
4196                 if (rc)
4197                         RETURN(rc);
4198
4199                 LASSERT(ms->ms_server_seq != NULL);
4200                 rc = seq_server_set_cli(ms->ms_server_seq, ms->ms_client_seq,
4201                                         env);
4202         }
4203
4204         RETURN(rc);
4205 }
4206
4207 static void mdt_seq_fini_cli(struct mdt_device *m)
4208 {
4209         struct md_site *ms;
4210
4211         ENTRY;
4212
4213         ms = mdt_md_site(m);
4214
4215         if (ms != NULL) {
4216                 if (ms->ms_server_seq)
4217                         seq_server_set_cli(ms->ms_server_seq,
4218                                    NULL, NULL);
4219
4220                 if (ms->ms_control_exp) {
4221                         class_export_put(ms->ms_control_exp);
4222                         ms->ms_control_exp = NULL;
4223                 }
4224         }
4225         EXIT;
4226 }
4227
4228 /*
4229  * FLD wrappers
4230  */
4231 static int mdt_fld_fini(const struct lu_env *env,
4232                         struct mdt_device *m)
4233 {
4234         struct md_site *ms = mdt_md_site(m);
4235         ENTRY;
4236
4237         if (ms && ms->ms_server_fld) {
4238                 fld_server_fini(ms->ms_server_fld, env);
4239                 OBD_FREE_PTR(ms->ms_server_fld);
4240                 ms->ms_server_fld = NULL;
4241         }
4242
4243         RETURN(0);
4244 }
4245
4246 static int mdt_fld_init(const struct lu_env *env,
4247                         const char *uuid,
4248                         struct mdt_device *m)
4249 {
4250         struct md_site *ms;
4251         int rc;
4252         ENTRY;
4253
4254         ms = mdt_md_site(m);
4255
4256         OBD_ALLOC_PTR(ms->ms_server_fld);
4257         if (ms->ms_server_fld == NULL)
4258                 RETURN(rc = -ENOMEM);
4259
4260         rc = fld_server_init(ms->ms_server_fld,
4261                              m->mdt_bottom, uuid,
4262                              env, ms->ms_node_id);
4263         if (rc) {
4264                 OBD_FREE_PTR(ms->ms_server_fld);
4265                 ms->ms_server_fld = NULL;
4266                 RETURN(rc);
4267         }
4268
4269         RETURN(0);
4270 }
4271
4272 /* device init/fini methods */
4273 static void mdt_stop_ptlrpc_service(struct mdt_device *m)
4274 {
4275         ENTRY;
4276         if (m->mdt_regular_service != NULL) {
4277                 ptlrpc_unregister_service(m->mdt_regular_service);
4278                 m->mdt_regular_service = NULL;
4279         }
4280         if (m->mdt_readpage_service != NULL) {
4281                 ptlrpc_unregister_service(m->mdt_readpage_service);
4282                 m->mdt_readpage_service = NULL;
4283         }
4284         if (m->mdt_xmds_service != NULL) {
4285                 ptlrpc_unregister_service(m->mdt_xmds_service);
4286                 m->mdt_xmds_service = NULL;
4287         }
4288         if (m->mdt_setattr_service != NULL) {
4289                 ptlrpc_unregister_service(m->mdt_setattr_service);
4290                 m->mdt_setattr_service = NULL;
4291         }
4292         if (m->mdt_mdsc_service != NULL) {
4293                 ptlrpc_unregister_service(m->mdt_mdsc_service);
4294                 m->mdt_mdsc_service = NULL;
4295         }
4296         if (m->mdt_mdss_service != NULL) {
4297                 ptlrpc_unregister_service(m->mdt_mdss_service);
4298                 m->mdt_mdss_service = NULL;
4299         }
4300         if (m->mdt_dtss_service != NULL) {
4301                 ptlrpc_unregister_service(m->mdt_dtss_service);
4302                 m->mdt_dtss_service = NULL;
4303         }
4304         if (m->mdt_fld_service != NULL) {
4305                 ptlrpc_unregister_service(m->mdt_fld_service);
4306                 m->mdt_fld_service = NULL;
4307         }
4308         EXIT;
4309 }
4310
4311 static int mdt_start_ptlrpc_service(struct mdt_device *m)
4312 {
4313         static struct ptlrpc_service_conf conf;
4314         cfs_proc_dir_entry_t *procfs_entry;
4315         int rc = 0;
4316         ENTRY;
4317
4318         m->mdt_ldlm_client = &m->mdt_md_dev.md_lu_dev.ld_obd->obd_ldlm_client;
4319         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
4320                            "mdt_ldlm_client", m->mdt_ldlm_client);
4321
4322         procfs_entry = m->mdt_md_dev.md_lu_dev.ld_obd->obd_proc_entry;
4323
4324         conf = (typeof(conf)) {
4325                 .psc_name               = LUSTRE_MDT_NAME,
4326                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4327                 .psc_buf                = {
4328                         .bc_nbufs               = MDS_NBUFS,
4329                         .bc_buf_size            = MDS_BUFSIZE,
4330                         .bc_req_max_size        = MDS_MAXREQSIZE,
4331                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4332                         .bc_req_portal          = MDS_REQUEST_PORTAL,
4333                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4334                 },
4335                 /*
4336                  * We'd like to have a mechanism to set this on a per-device
4337                  * basis, but alas...
4338                  */
4339                 .psc_thr                = {
4340                         .tc_thr_name            = LUSTRE_MDT_NAME,
4341                         .tc_thr_factor          = MDT_THR_FACTOR,
4342                         .tc_nthrs_init          = MDT_NTHRS_INIT,
4343                         .tc_nthrs_base          = MDT_NTHRS_BASE,
4344                         .tc_nthrs_max           = MDT_NTHRS_MAX,
4345                         .tc_nthrs_user          = mds_num_threads,
4346                         .tc_cpu_affinity        = 1,
4347                         .tc_ctx_tags            = LCT_MD_THREAD,
4348                 },
4349                 .psc_cpt                = {
4350                         .cc_pattern             = mds_num_cpts,
4351                 },
4352                 .psc_ops                = {
4353                         .so_req_handler         = mdt_regular_handle,
4354                         .so_req_printer         = target_print_req,
4355                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4356                 },
4357         };
4358         m->mdt_regular_service = ptlrpc_register_service(&conf, procfs_entry);
4359         if (IS_ERR(m->mdt_regular_service)) {
4360                 rc = PTR_ERR(m->mdt_regular_service);
4361                 CERROR("failed to start regular mdt service: %d\n", rc);
4362                 m->mdt_regular_service = NULL;
4363
4364                 RETURN(rc);
4365         }
4366
4367         /*
4368          * readpage service configuration. Parameters have to be adjusted,
4369          * ideally.
4370          */
4371         memset(&conf, 0, sizeof(conf));
4372         conf = (typeof(conf)) {
4373                 .psc_name               = LUSTRE_MDT_NAME "_readpage",
4374                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4375                 .psc_buf                = {
4376                         .bc_nbufs               = MDS_NBUFS,
4377                         .bc_buf_size            = MDS_BUFSIZE,
4378                         .bc_req_max_size        = MDS_MAXREQSIZE,
4379                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4380                         .bc_req_portal          = MDS_READPAGE_PORTAL,
4381                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4382                 },
4383                 .psc_thr                = {
4384                         .tc_thr_name            = "mdt_rdpg",
4385                         .tc_thr_factor          = MDT_RDPG_THR_FACTOR,
4386                         .tc_nthrs_init          = MDT_RDPG_NTHRS_INIT,
4387                         .tc_nthrs_base          = MDT_RDPG_NTHRS_BASE,
4388                         .tc_nthrs_max           = MDT_RDPG_NTHRS_MAX,
4389                         .tc_nthrs_user          = mds_rdpg_num_threads,
4390                         .tc_cpu_affinity        = 1,
4391                         .tc_ctx_tags            = LCT_MD_THREAD,
4392                 },
4393                 .psc_cpt                = {
4394                         .cc_pattern             = mds_rdpg_num_cpts,
4395                 },
4396                 .psc_ops                = {
4397                         .so_req_handler         = mdt_readpage_handle,
4398                         .so_req_printer         = target_print_req,
4399                 },
4400         };
4401         m->mdt_readpage_service = ptlrpc_register_service(&conf, procfs_entry);
4402         if (IS_ERR(m->mdt_readpage_service)) {
4403                 rc = PTR_ERR(m->mdt_readpage_service);
4404                 CERROR("failed to start readpage service: %d\n", rc);
4405                 m->mdt_readpage_service = NULL;
4406
4407                 GOTO(err_mdt_svc, rc);
4408         }
4409
4410         /*
4411          * setattr service configuration.
4412          *
4413          * XXX To keep the compatibility with old client(< 2.2), we need to
4414          * preserve this portal for a certain time, it should be removed
4415          * eventually. LU-617.
4416          */
4417         memset(&conf, 0, sizeof(conf));
4418         conf = (typeof(conf)) {
4419                 .psc_name               = LUSTRE_MDT_NAME "_setattr",
4420                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4421                 .psc_buf                = {
4422                         .bc_nbufs               = MDS_NBUFS,
4423                         .bc_buf_size            = MDS_BUFSIZE,
4424                         .bc_req_max_size        = MDS_MAXREQSIZE,
4425                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4426                         .bc_req_portal          = MDS_SETATTR_PORTAL,
4427                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4428                 },
4429                 .psc_thr                = {
4430                         .tc_thr_name            = "mdt_attr",
4431                         .tc_thr_factor          = MDT_SETA_THR_FACTOR,
4432                         .tc_nthrs_init          = MDT_SETA_NTHRS_INIT,
4433                         .tc_nthrs_base          = MDT_SETA_NTHRS_BASE,
4434                         .tc_nthrs_max           = MDT_SETA_NTHRS_MAX,
4435                         .tc_nthrs_user          = mds_attr_num_threads,
4436                         .tc_cpu_affinity        = 1,
4437                         .tc_ctx_tags            = LCT_MD_THREAD,
4438                 },
4439                 .psc_cpt                = {
4440                         .cc_pattern             = mds_attr_num_cpts,
4441                 },
4442                 .psc_ops                = {
4443                         .so_req_handler         = mdt_regular_handle,
4444                         .so_req_printer         = target_print_req,
4445                 },
4446         };
4447         m->mdt_setattr_service = ptlrpc_register_service(&conf, procfs_entry);
4448         if (IS_ERR(m->mdt_setattr_service)) {
4449                 rc = PTR_ERR(m->mdt_setattr_service);
4450                 CERROR("failed to start setattr service: %d\n", rc);
4451                 m->mdt_setattr_service = NULL;
4452
4453                 GOTO(err_mdt_svc, rc);
4454         }
4455
4456         /*
4457          * sequence controller service configuration
4458          */
4459         memset(&conf, 0, sizeof(conf));
4460         conf = (typeof(conf)) {
4461                 .psc_name               = LUSTRE_MDT_NAME "_mdsc",
4462                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4463                 .psc_buf                = {
4464                         .bc_nbufs               = MDS_NBUFS,
4465                         .bc_buf_size            = MDS_BUFSIZE,
4466                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4467                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4468                         .bc_req_portal          = SEQ_CONTROLLER_PORTAL,
4469                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4470                 },
4471                 .psc_thr                = {
4472                         .tc_thr_name            = "mdt_mdsc",
4473                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4474                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4475                         .tc_ctx_tags            = LCT_MD_THREAD,
4476                 },
4477                 .psc_ops                = {
4478                         .so_req_handler         = mdt_mdsc_handle,
4479                         .so_req_printer         = target_print_req,
4480                 },
4481         };
4482         m->mdt_mdsc_service = ptlrpc_register_service(&conf, procfs_entry);
4483         if (IS_ERR(m->mdt_mdsc_service)) {
4484                 rc = PTR_ERR(m->mdt_mdsc_service);
4485                 CERROR("failed to start seq controller service: %d\n", rc);
4486                 m->mdt_mdsc_service = NULL;
4487
4488                 GOTO(err_mdt_svc, rc);
4489         }
4490
4491         /*
4492          * metadata sequence server service configuration
4493          */
4494         memset(&conf, 0, sizeof(conf));
4495         conf = (typeof(conf)) {
4496                 .psc_name               = LUSTRE_MDT_NAME "_mdss",
4497                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4498                 .psc_buf                = {
4499                         .bc_nbufs               = MDS_NBUFS,
4500                         .bc_buf_size            = MDS_BUFSIZE,
4501                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4502                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4503                         .bc_req_portal          = SEQ_METADATA_PORTAL,
4504                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4505                 },
4506                 .psc_thr                = {
4507                         .tc_thr_name            = "mdt_mdss",
4508                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4509                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4510                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4511                 },
4512                 .psc_ops                = {
4513                         .so_req_handler         = mdt_mdss_handle,
4514                         .so_req_printer         = target_print_req,
4515                 },
4516         };
4517         m->mdt_mdss_service = ptlrpc_register_service(&conf, procfs_entry);
4518         if (IS_ERR(m->mdt_mdss_service)) {
4519                 rc = PTR_ERR(m->mdt_mdss_service);
4520                 CERROR("failed to start metadata seq server service: %d\n", rc);
4521                 m->mdt_mdss_service = NULL;
4522
4523                 GOTO(err_mdt_svc, rc);
4524         }
4525
4526         /*
4527          * Data sequence server service configuration. We want to have really
4528          * cluster-wide sequences space. This is why we start only one sequence
4529          * controller which manages space.
4530          */
4531         memset(&conf, 0, sizeof(conf));
4532         conf = (typeof(conf)) {
4533                 .psc_name               = LUSTRE_MDT_NAME "_dtss",
4534                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4535                 .psc_buf                = {
4536                         .bc_nbufs               = MDS_NBUFS,
4537                         .bc_buf_size            = MDS_BUFSIZE,
4538                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4539                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4540                         .bc_req_portal          = SEQ_DATA_PORTAL,
4541                         .bc_rep_portal          = OSC_REPLY_PORTAL,
4542                 },
4543                 .psc_thr                = {
4544                         .tc_thr_name            = "mdt_dtss",
4545                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4546                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4547                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4548                 },
4549                 .psc_ops                = {
4550                         .so_req_handler         = mdt_dtss_handle,
4551                         .so_req_printer         = target_print_req,
4552                 },
4553         };
4554         m->mdt_dtss_service = ptlrpc_register_service(&conf, procfs_entry);
4555         if (IS_ERR(m->mdt_dtss_service)) {
4556                 rc = PTR_ERR(m->mdt_dtss_service);
4557                 CERROR("failed to start data seq server service: %d\n", rc);
4558                 m->mdt_dtss_service = NULL;
4559
4560                 GOTO(err_mdt_svc, rc);
4561         }
4562
4563         /* FLD service start */
4564         memset(&conf, 0, sizeof(conf));
4565         conf = (typeof(conf)) {
4566                 .psc_name            = LUSTRE_MDT_NAME "_fld",
4567                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4568                 .psc_buf                = {
4569                         .bc_nbufs               = MDS_NBUFS,
4570                         .bc_buf_size            = MDS_BUFSIZE,
4571                         .bc_req_max_size        = FLD_MAXREQSIZE,
4572                         .bc_rep_max_size        = FLD_MAXREPSIZE,
4573                         .bc_req_portal          = FLD_REQUEST_PORTAL,
4574                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4575                 },
4576                 .psc_thr                = {
4577                         .tc_thr_name            = "mdt_fld",
4578                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4579                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4580                         .tc_ctx_tags            = LCT_DT_THREAD | LCT_MD_THREAD
4581                 },
4582                 .psc_ops                = {
4583                         .so_req_handler         = mdt_fld_handle,
4584                         .so_req_printer         = target_print_req,
4585                 },
4586         };
4587         m->mdt_fld_service = ptlrpc_register_service(&conf, procfs_entry);
4588         if (IS_ERR(m->mdt_fld_service)) {
4589                 rc = PTR_ERR(m->mdt_fld_service);
4590                 CERROR("failed to start fld service: %d\n", rc);
4591                 m->mdt_fld_service = NULL;
4592
4593                 GOTO(err_mdt_svc, rc);
4594         }
4595
4596         /*
4597          * mds-mds service configuration. Separate portal is used to allow
4598          * mds-mds requests be not blocked during recovery.
4599          */
4600         memset(&conf, 0, sizeof(conf));
4601         conf = (typeof(conf)) {
4602                 .psc_name               = LUSTRE_MDT_NAME "_mds",
4603                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4604                 .psc_buf                = {
4605                         .bc_nbufs               = MDS_NBUFS,
4606                         .bc_buf_size            = MDS_BUFSIZE,
4607                         .bc_req_max_size        = MDS_MAXREQSIZE,
4608                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4609                         .bc_req_portal          = MDS_MDS_PORTAL,
4610                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4611                 },
4612                 .psc_thr                = {
4613                         .tc_thr_name            = "mdt_mds",
4614                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4615                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4616                         .tc_ctx_tags            = LCT_MD_THREAD,
4617                 },
4618                 .psc_ops                = {
4619                         .so_req_handler         = mdt_xmds_handle,
4620                         .so_req_printer         = target_print_req,
4621                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4622                 },
4623         };
4624         m->mdt_xmds_service = ptlrpc_register_service(&conf, procfs_entry);
4625         if (IS_ERR(m->mdt_xmds_service)) {
4626                 rc = PTR_ERR(m->mdt_xmds_service);
4627                 CERROR("failed to start xmds service: %d\n", rc);
4628                 m->mdt_xmds_service = NULL;
4629
4630                 GOTO(err_mdt_svc, rc);
4631         }
4632
4633         EXIT;
4634 err_mdt_svc:
4635         if (rc)
4636                 mdt_stop_ptlrpc_service(m);
4637
4638         return rc;
4639 }
4640
4641 static void mdt_stack_fini(const struct lu_env *env,
4642                            struct mdt_device *m, struct lu_device *top)
4643 {
4644         struct obd_device       *obd = mdt2obd_dev(m);
4645         struct lustre_cfg_bufs  *bufs;
4646         struct lustre_cfg       *lcfg;
4647         struct mdt_thread_info  *info;
4648         char flags[3]="";
4649         ENTRY;
4650
4651         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4652         LASSERT(info != NULL);
4653
4654         lu_dev_del_linkage(top->ld_site, top);
4655
4656         lu_site_purge(env, top->ld_site, -1);
4657
4658         bufs = &info->mti_u.bufs;
4659         /* process cleanup, pass mdt obd name to get obd umount flags */
4660         /* another purpose is to let all layers to release their objects */
4661         lustre_cfg_bufs_reset(bufs, obd->obd_name);
4662         if (obd->obd_force)
4663                 strcat(flags, "F");
4664         if (obd->obd_fail)
4665                 strcat(flags, "A");
4666         lustre_cfg_bufs_set_string(bufs, 1, flags);
4667         lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
4668         if (!lcfg) {
4669                 CERROR("Cannot alloc lcfg!\n");
4670                 return;
4671         }
4672         LASSERT(top);
4673         top->ld_ops->ldo_process_config(env, top, lcfg);
4674         lustre_cfg_free(lcfg);
4675
4676         lu_site_purge(env, top->ld_site, -1);
4677
4678         m->mdt_child = NULL;
4679         m->mdt_bottom = NULL;
4680
4681         obd_disconnect(m->mdt_child_exp);
4682         m->mdt_child_exp = NULL;
4683
4684         obd_disconnect(m->mdt_bottom_exp);
4685         m->mdt_child_exp = NULL;
4686 }
4687
4688 static int mdt_connect_to_next(const struct lu_env *env, struct mdt_device *m,
4689                                const char *next, struct obd_export **exp)
4690 {
4691         struct obd_connect_data *data = NULL;
4692         struct obd_device       *obd;
4693         int                      rc;
4694         ENTRY;
4695
4696         OBD_ALLOC_PTR(data);
4697         if (data == NULL)
4698                 GOTO(out, rc = -ENOMEM);
4699
4700         obd = class_name2obd(next);
4701         if (obd == NULL) {
4702                 CERROR("%s: can't locate next device: %s\n",
4703                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next);
4704                 GOTO(out, rc = -ENOTCONN);
4705         }
4706
4707         data->ocd_connect_flags = OBD_CONNECT_VERSION;
4708         data->ocd_version = LUSTRE_VERSION_CODE;
4709
4710         rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
4711         if (rc) {
4712                 CERROR("%s: cannot connect to next dev %s (%d)\n",
4713                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next, rc);
4714                 GOTO(out, rc);
4715         }
4716
4717 out:
4718         if (data)
4719                 OBD_FREE_PTR(data);
4720         RETURN(rc);
4721 }
4722
4723 static int mdt_stack_init(const struct lu_env *env, struct mdt_device *mdt,
4724                           struct lustre_cfg *cfg)
4725 {
4726         char                   *dev = lustre_cfg_string(cfg, 0);
4727         int                     rc, name_size, uuid_size;
4728         char                   *name, *uuid, *p;
4729         struct lustre_cfg_bufs *bufs;
4730         struct lustre_cfg      *lcfg;
4731         struct obd_device      *obd;
4732         struct lustre_profile  *lprof;
4733         struct lu_site         *site;
4734         ENTRY;
4735
4736         /* in 1.8 we had the only device in the stack - MDS.
4737          * 2.0 introduces MDT, MDD, OSD; MDT starts others internally.
4738          * in 2.3 OSD is instantiated by obd_mount.c, so we need
4739          * to generate names and setup MDT, MDD. MDT will be using
4740          * generated name to connect to MDD. for MDD the next device
4741          * will be LOD with name taken from so called "profile" which
4742          * is generated by mount_option line
4743          *
4744          * 1.8 MGS generates config. commands like this:
4745          *   #06 (104)mount_option 0:  1:lustre-MDT0000  2:lustre-mdtlov
4746          *   #08 (120)setup   0:lustre-MDT0000  1:dev 2:type 3:lustre-MDT0000
4747          * 2.0 MGS generates config. commands like this:
4748          *   #07 (112)mount_option 0:  1:lustre-MDT0000  2:lustre-MDT0000-mdtlov
4749          *   #08 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4750          *                    3:lustre-MDT0000-mdtlov  4:f
4751          *
4752          * we generate MDD name from MDT one, just replacing T with D
4753          *
4754          * after all the preparations, the logical equivalent will be
4755          *   #01 (160)setup   0:lustre-MDD0000  1:lustre-MDD0000_UUID  2:0
4756          *                    3:lustre-MDT0000-mdtlov  4:f
4757          *   #02 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4758          *                    3:lustre-MDD0000  4:f
4759          *
4760          *  notice we build the stack from down to top: MDD first, then MDT */
4761
4762         name_size = MAX_OBD_NAME;
4763         uuid_size = MAX_OBD_NAME;
4764
4765         OBD_ALLOC(name, name_size);
4766         OBD_ALLOC(uuid, uuid_size);
4767         if (name == NULL || uuid == NULL)
4768                 GOTO(cleanup_mem, rc = -ENOMEM);
4769
4770         OBD_ALLOC_PTR(bufs);
4771         if (!bufs)
4772                 GOTO(cleanup_mem, rc = -ENOMEM);
4773
4774         strcpy(name, dev);
4775         p = strstr(name, "-MDT");
4776         if (p == NULL)
4777                 GOTO(cleanup_mem, rc = -ENOMEM);
4778         p[3] = 'D';
4779
4780         snprintf(uuid, MAX_OBD_NAME, "%s_UUID", name);
4781
4782         lprof = class_get_profile(lustre_cfg_string(cfg, 0));
4783         if (lprof == NULL || lprof->lp_dt == NULL) {
4784                 CERROR("can't find the profile: %s\n",
4785                        lustre_cfg_string(cfg, 0));
4786                 GOTO(cleanup_mem, rc = -EINVAL);
4787         }
4788
4789         lustre_cfg_bufs_reset(bufs, name);
4790         lustre_cfg_bufs_set_string(bufs, 1, LUSTRE_MDD_NAME);
4791         lustre_cfg_bufs_set_string(bufs, 2, uuid);
4792         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4793
4794         lcfg = lustre_cfg_new(LCFG_ATTACH, bufs);
4795         if (!lcfg)
4796                 GOTO(free_bufs, rc = -ENOMEM);
4797
4798         rc = class_attach(lcfg);
4799         if (rc)
4800                 GOTO(lcfg_cleanup, rc);
4801
4802         obd = class_name2obd(name);
4803         if (!obd) {
4804                 CERROR("Can not find obd %s (%s in config)\n",
4805                        MDD_OBD_NAME, lustre_cfg_string(cfg, 0));
4806                 GOTO(class_detach, rc = -EINVAL);
4807         }
4808
4809         lustre_cfg_free(lcfg);
4810
4811         lustre_cfg_bufs_reset(bufs, name);
4812         lustre_cfg_bufs_set_string(bufs, 1, uuid);
4813         lustre_cfg_bufs_set_string(bufs, 2, dev);
4814         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4815
4816         lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
4817
4818         rc = class_setup(obd, lcfg);
4819         if (rc)
4820                 GOTO(class_detach, rc);
4821
4822         /* connect to MDD we just setup */
4823         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_child_exp);
4824         if (rc)
4825                 RETURN(rc);
4826
4827         site = mdt->mdt_child_exp->exp_obd->obd_lu_dev->ld_site;
4828         LASSERT(site);
4829         LASSERT(mdt->mdt_md_dev.md_lu_dev.ld_site == NULL);
4830         mdt->mdt_md_dev.md_lu_dev.ld_site = site;
4831         site->ls_top_dev = &mdt->mdt_md_dev.md_lu_dev;
4832         mdt->mdt_child = lu2md_dev(mdt->mdt_child_exp->exp_obd->obd_lu_dev);
4833
4834
4835         /* now connect to bottom OSD */
4836         snprintf(name, MAX_OBD_NAME, "%s-osd", dev);
4837         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_bottom_exp);
4838         if (rc)
4839                 RETURN(rc);
4840         mdt->mdt_bottom =
4841                 lu2dt_dev(mdt->mdt_bottom_exp->exp_obd->obd_lu_dev);
4842
4843
4844         rc = lu_env_refill((struct lu_env *)env);
4845         if (rc != 0)
4846                 CERROR("Failure to refill session: '%d'\n", rc);
4847
4848         lu_dev_add_linkage(site, &mdt->mdt_md_dev.md_lu_dev);
4849
4850         EXIT;
4851 class_detach:
4852         if (rc)
4853                 class_detach(obd, lcfg);
4854 lcfg_cleanup:
4855         lustre_cfg_free(lcfg);
4856 free_bufs:
4857         OBD_FREE_PTR(bufs);
4858 cleanup_mem:
4859         if (name)
4860                 OBD_FREE(name, name_size);
4861         if (uuid)
4862                 OBD_FREE(uuid, uuid_size);
4863         RETURN(rc);
4864 }
4865
4866 /* setup quota master target on MDT0 */
4867 static int mdt_quota_init(const struct lu_env *env, struct mdt_device *mdt,
4868                           struct lustre_cfg *cfg)
4869 {
4870         struct obd_device       *obd;
4871         char                    *dev = lustre_cfg_string(cfg, 0);
4872         char                    *qmtname, *uuid, *p;
4873         struct lustre_cfg_bufs  *bufs;
4874         struct lustre_cfg       *lcfg;
4875         struct lustre_profile   *lprof;
4876         struct obd_connect_data *data;
4877         int                      rc;
4878         ENTRY;
4879
4880         LASSERT(mdt->mdt_qmt_exp == NULL);
4881         LASSERT(mdt->mdt_qmt_dev == NULL);
4882
4883         /* quota master is on MDT0 only for now */
4884         if (mdt->mdt_mite.ms_node_id != 0)
4885                 RETURN(0);
4886
4887         /* MGS generates config commands which look as follows:
4888          *   #01 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4889          *                    3:lustre-MDT0000-mdtlov  4:f
4890          *
4891          * We generate the QMT name from the MDT one, just replacing MD with QM
4892          * after all the preparations, the logical equivalent will be:
4893          *   #01 (160)setup   0:lustre-QMT0000  1:lustre-QMT0000_UUID  2:0
4894          *                    3:lustre-MDT0000-osd  4:f */
4895         OBD_ALLOC(qmtname, MAX_OBD_NAME);
4896         OBD_ALLOC(uuid, UUID_MAX);
4897         OBD_ALLOC_PTR(bufs);
4898         OBD_ALLOC_PTR(data);
4899         if (qmtname == NULL || uuid == NULL || bufs == NULL || data == NULL)
4900                 GOTO(cleanup_mem, rc = -ENOMEM);
4901
4902         strcpy(qmtname, dev);
4903         p = strstr(qmtname, "-MDT");
4904         if (p == NULL)
4905                 GOTO(cleanup_mem, rc = -ENOMEM);
4906         /* replace MD with QM */
4907         p[1] = 'Q';
4908         p[2] = 'M';
4909
4910         snprintf(uuid, UUID_MAX, "%s_UUID", qmtname);
4911
4912         lprof = class_get_profile(lustre_cfg_string(cfg, 0));
4913         if (lprof == NULL || lprof->lp_dt == NULL) {
4914                 CERROR("can't find profile for %s\n",
4915                        lustre_cfg_string(cfg, 0));
4916                 GOTO(cleanup_mem, rc = -EINVAL);
4917         }
4918
4919         lustre_cfg_bufs_reset(bufs, qmtname);
4920         lustre_cfg_bufs_set_string(bufs, 1, LUSTRE_QMT_NAME);
4921         lustre_cfg_bufs_set_string(bufs, 2, uuid);
4922         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4923
4924         lcfg = lustre_cfg_new(LCFG_ATTACH, bufs);
4925         if (!lcfg)
4926                 GOTO(cleanup_mem, rc = -ENOMEM);
4927
4928         rc = class_attach(lcfg);
4929         if (rc)
4930                 GOTO(lcfg_cleanup, rc);
4931
4932         obd = class_name2obd(qmtname);
4933         if (!obd) {
4934                 CERROR("Can not find obd %s (%s in config)\n", qmtname,
4935                        lustre_cfg_string(cfg, 0));
4936                 GOTO(class_detach, rc = -EINVAL);
4937         }
4938
4939         lustre_cfg_free(lcfg);
4940
4941         lustre_cfg_bufs_reset(bufs, qmtname);
4942         lustre_cfg_bufs_set_string(bufs, 1, uuid);
4943         lustre_cfg_bufs_set_string(bufs, 2, dev);
4944
4945         /* for quota, the next device should be the OSD device */
4946         lustre_cfg_bufs_set_string(bufs, 3,
4947                                    mdt->mdt_bottom->dd_lu_dev.ld_obd->obd_name);
4948
4949         lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
4950
4951         rc = class_setup(obd, lcfg);
4952         if (rc)
4953                 GOTO(class_detach, rc);
4954
4955         mdt->mdt_qmt_dev = obd->obd_lu_dev;
4956
4957         /* configure local quota objects */
4958         rc = mdt->mdt_qmt_dev->ld_ops->ldo_prepare(env,
4959                                                    &mdt->mdt_md_dev.md_lu_dev,
4960                                                    mdt->mdt_qmt_dev);
4961         if (rc)
4962                 GOTO(class_cleanup, rc);
4963
4964         /* connect to quota master target */
4965         data->ocd_connect_flags = OBD_CONNECT_VERSION;
4966         data->ocd_version = LUSTRE_VERSION_CODE;
4967         rc = obd_connect(NULL, &mdt->mdt_qmt_exp, obd, &obd->obd_uuid,
4968                          data, NULL);
4969         if (rc) {
4970                 CERROR("cannot connect to quota master device %s (%d)\n",
4971                        qmtname, rc);
4972                 GOTO(class_cleanup, rc);
4973         }
4974
4975         EXIT;
4976 class_cleanup:
4977         if (rc) {
4978                 class_manual_cleanup(obd);
4979                 mdt->mdt_qmt_dev = NULL;
4980         }
4981 class_detach:
4982         if (rc)
4983                 class_detach(obd, lcfg);
4984 lcfg_cleanup:
4985         lustre_cfg_free(lcfg);
4986 cleanup_mem:
4987         if (bufs)
4988                 OBD_FREE_PTR(bufs);
4989         if (qmtname)
4990                 OBD_FREE(qmtname, MAX_OBD_NAME);
4991         if (uuid)
4992                 OBD_FREE(uuid, UUID_MAX);
4993         if (data)
4994                 OBD_FREE_PTR(data);
4995         return rc;
4996 }
4997
4998 /* Shutdown quota master target associated with mdt */
4999 static void mdt_quota_fini(const struct lu_env *env, struct mdt_device *mdt)
5000 {
5001         ENTRY;
5002
5003         if (mdt->mdt_qmt_exp == NULL)
5004                 RETURN_EXIT;
5005         LASSERT(mdt->mdt_qmt_dev != NULL);
5006
5007         /* the qmt automatically shuts down when the mdt disconnects */
5008         obd_disconnect(mdt->mdt_qmt_exp);
5009         mdt->mdt_qmt_exp = NULL;
5010         mdt->mdt_qmt_dev = NULL;
5011         EXIT;
5012 }
5013
5014 static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
5015 {
5016         struct md_device  *next = m->mdt_child;
5017         struct lu_device  *d    = &m->mdt_md_dev.md_lu_dev;
5018         struct obd_device *obd = mdt2obd_dev(m);
5019         ENTRY;
5020
5021         target_recovery_fini(obd);
5022
5023         ping_evictor_stop();
5024
5025         mdt_stop_ptlrpc_service(m);
5026         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
5027         obd_exports_barrier(obd);
5028         obd_zombie_barrier();
5029
5030         mdt_procfs_fini(m);
5031
5032         tgt_fini(env, &m->mdt_lut);
5033         mdt_fs_cleanup(env, m);
5034         upcall_cache_cleanup(m->mdt_identity_cache);
5035         m->mdt_identity_cache = NULL;
5036
5037         if (m->mdt_namespace != NULL) {
5038                 ldlm_namespace_free(m->mdt_namespace, NULL,
5039                                     d->ld_obd->obd_force);
5040                 d->ld_obd->obd_namespace = m->mdt_namespace = NULL;
5041         }
5042
5043         mdt_quota_fini(env, m);
5044
5045         cfs_free_nidlist(&m->mdt_nosquash_nids);
5046         if (m->mdt_nosquash_str) {
5047                 OBD_FREE(m->mdt_nosquash_str, m->mdt_nosquash_strlen);
5048                 m->mdt_nosquash_str = NULL;
5049                 m->mdt_nosquash_strlen = 0;
5050         }
5051
5052         mdt_seq_fini(env, m);
5053         mdt_seq_fini_cli(m);
5054         mdt_fld_fini(env, m);
5055         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
5056
5057         next->md_ops->mdo_init_capa_ctxt(env, next, 0, 0, 0, NULL);
5058         cfs_timer_disarm(&m->mdt_ck_timer);
5059         mdt_ck_thread_stop(m);
5060
5061         /*
5062          * Finish the stack
5063          */
5064         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
5065
5066         LASSERT(cfs_atomic_read(&d->ld_ref) == 0);
5067
5068         server_put_mount(mdt2obd_dev(m)->obd_name, NULL);
5069
5070         EXIT;
5071 }
5072
5073 static int mdt_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
5074 {
5075         struct mdt_device       *m = mdt_dev(obd->obd_lu_dev);
5076         struct sptlrpc_rule_set  tmp_rset;
5077         int                      rc;
5078
5079         sptlrpc_rule_set_init(&tmp_rset);
5080         rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
5081         if (rc) {
5082                 CERROR("mdt %s: failed get sptlrpc rules: %d\n",
5083                        obd->obd_name, rc);
5084                 return rc;
5085         }
5086
5087         sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
5088
5089         cfs_write_lock(&m->mdt_sptlrpc_lock);
5090         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
5091         m->mdt_sptlrpc_rset = tmp_rset;
5092         cfs_write_unlock(&m->mdt_sptlrpc_lock);
5093
5094         return 0;
5095 }
5096
5097 int mdt_postrecov(const struct lu_env *, struct mdt_device *);
5098
5099 static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
5100                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
5101 {
5102         struct mdt_thread_info    *info;
5103         struct obd_device         *obd;
5104         const char                *dev = lustre_cfg_string(cfg, 0);
5105         const char                *num = lustre_cfg_string(cfg, 2);
5106         struct lustre_mount_info  *lmi = NULL;
5107         struct lustre_sb_info     *lsi;
5108         struct lu_site            *s;
5109         struct md_site            *mite;
5110         const char                *identity_upcall = "NONE";
5111         struct md_device          *next;
5112         int                        rc;
5113         int                        node_id;
5114         mntopt_t                   mntopts;
5115         ENTRY;
5116
5117         md_device_init(&m->mdt_md_dev, ldt);
5118         /*
5119          * Environment (env) might be missing mdt_thread_key values at that
5120          * point, if device is allocated when mdt_thread_key is in QUIESCENT
5121          * mode.
5122          *
5123          * Usually device allocation path doesn't use module key values, but
5124          * mdt has to do a lot of work here, so allocate key value.
5125          */
5126         rc = lu_env_refill((struct lu_env *)env);
5127         if (rc != 0)
5128                 RETURN(rc);
5129
5130         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5131         LASSERT(info != NULL);
5132
5133         obd = class_name2obd(dev);
5134         LASSERT(obd != NULL);
5135
5136         m->mdt_max_mdsize = MAX_MD_SIZE; /* 4 stripes */
5137
5138         m->mdt_som_conf = 0;
5139
5140         m->mdt_opts.mo_cos = MDT_COS_DEFAULT;
5141         lmi = server_get_mount(dev);
5142         if (lmi == NULL) {
5143                 CERROR("Cannot get mount info for %s!\n", dev);
5144                 RETURN(-EFAULT);
5145         } else {
5146                 lsi = s2lsi(lmi->lmi_sb);
5147                 /* CMD is supported only in IAM mode */
5148                 LASSERT(num);
5149                 node_id = simple_strtol(num, NULL, 10);
5150                 if (!(lsi->lsi_flags & LDD_F_IAM_DIR) && node_id) {
5151                         CERROR("CMD Operation not allowed in IOP mode\n");
5152                         GOTO(err_lmi, rc = -EINVAL);
5153                 }
5154
5155                 obd->u.obt.obt_magic = OBT_MAGIC;
5156         }
5157
5158         cfs_rwlock_init(&m->mdt_sptlrpc_lock);
5159         sptlrpc_rule_set_init(&m->mdt_sptlrpc_rset);
5160
5161         cfs_spin_lock_init(&m->mdt_ioepoch_lock);
5162         m->mdt_opts.mo_compat_resname = 0;
5163         m->mdt_opts.mo_mds_capa = 1;
5164         m->mdt_opts.mo_oss_capa = 1;
5165         m->mdt_capa_timeout = CAPA_TIMEOUT;
5166         m->mdt_capa_alg = CAPA_HMAC_ALG_SHA1;
5167         m->mdt_ck_timeout = CAPA_KEY_TIMEOUT;
5168         m->mdt_squash_uid = 0;
5169         m->mdt_squash_gid = 0;
5170         CFS_INIT_LIST_HEAD(&m->mdt_nosquash_nids);
5171         m->mdt_nosquash_str = NULL;
5172         m->mdt_nosquash_strlen = 0;
5173         cfs_init_rwsem(&m->mdt_squash_sem);
5174         cfs_spin_lock_init(&m->mdt_osfs_lock);
5175         m->mdt_osfs_age = cfs_time_shift_64(-1000);
5176
5177         m->mdt_md_dev.md_lu_dev.ld_ops = &mdt_lu_ops;
5178         m->mdt_md_dev.md_lu_dev.ld_obd = obd;
5179         /* set this lu_device to obd, because error handling need it */
5180         obd->obd_lu_dev = &m->mdt_md_dev.md_lu_dev;
5181
5182         /* init the stack */
5183         rc = mdt_stack_init((struct lu_env *)env, m, cfg);
5184         if (rc) {
5185                 CERROR("Can't init device stack, rc %d\n", rc);
5186                 RETURN(rc);
5187         }
5188
5189         s = m->mdt_md_dev.md_lu_dev.ld_site;
5190         mite = &m->mdt_mite;
5191         s->ld_md_site = mite;
5192
5193         /* set server index */
5194         mite->ms_node_id = node_id;
5195
5196         /* failover is the default
5197          * FIXME: we do not failout mds0/mgs, which may cause some problems.
5198          * assumed whose ms_node_id == 0 XXX
5199          * */
5200         obd->obd_replayable = 1;
5201         /* No connection accepted until configurations will finish */
5202         obd->obd_no_conn = 1;
5203
5204         if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
5205                 char *str = lustre_cfg_string(cfg, 4);
5206                 if (strchr(str, 'n')) {
5207                         CWARN("%s: recovery disabled\n", obd->obd_name);
5208                         obd->obd_replayable = 0;
5209                 }
5210         }
5211
5212         rc = tgt_init(env, &m->mdt_lut, obd, m->mdt_bottom);
5213         if (rc)
5214                 GOTO(err_fini_stack, rc);
5215
5216         snprintf(info->mti_u.ns_name, sizeof info->mti_u.ns_name,
5217                  LUSTRE_MDT_NAME"-%p", m);
5218         m->mdt_namespace = ldlm_namespace_new(obd, info->mti_u.ns_name,
5219                                               LDLM_NAMESPACE_SERVER,
5220                                               LDLM_NAMESPACE_GREEDY,
5221                                               LDLM_NS_TYPE_MDT);
5222         if (m->mdt_namespace == NULL)
5223                 GOTO(err_fini_seq, rc = -ENOMEM);
5224
5225         m->mdt_namespace->ns_lvbp = m;
5226         m->mdt_namespace->ns_lvbo = &mdt_lvbo;
5227
5228         ldlm_register_intent(m->mdt_namespace, mdt_intent_policy);
5229         /* set obd_namespace for compatibility with old code */
5230         obd->obd_namespace = m->mdt_namespace;
5231
5232         cfs_timer_init(&m->mdt_ck_timer, mdt_ck_timer_callback, m);
5233
5234         rc = mdt_ck_thread_start(m);
5235         if (rc)
5236                 GOTO(err_free_ns, rc);
5237
5238         rc = mdt_fs_setup(env, m, obd, lsi);
5239         if (rc)
5240                 GOTO(err_capa, rc);
5241
5242         mdt_adapt_sptlrpc_conf(obd, 1);
5243
5244         next = m->mdt_child;
5245         rc = next->md_ops->mdo_iocontrol(env, next, OBD_IOC_GET_MNTOPT, 0,
5246                                          &mntopts);
5247         if (rc)
5248                 GOTO(err_llog_cleanup, rc);
5249
5250         if (mntopts & MNTOPT_USERXATTR)
5251                 m->mdt_opts.mo_user_xattr = 1;
5252         else
5253                 m->mdt_opts.mo_user_xattr = 0;
5254
5255         if (mntopts & MNTOPT_ACL)
5256                 m->mdt_opts.mo_acl = 1;
5257         else
5258                 m->mdt_opts.mo_acl = 0;
5259
5260         /* XXX: to support suppgid for ACL, we enable identity_upcall
5261          * by default, otherwise, maybe got unexpected -EACCESS. */
5262         if (m->mdt_opts.mo_acl)
5263                 identity_upcall = MDT_IDENTITY_UPCALL_PATH;
5264
5265         m->mdt_identity_cache = upcall_cache_init(obd->obd_name,identity_upcall,
5266                                                 &mdt_identity_upcall_cache_ops);
5267         if (IS_ERR(m->mdt_identity_cache)) {
5268                 rc = PTR_ERR(m->mdt_identity_cache);
5269                 m->mdt_identity_cache = NULL;
5270                 GOTO(err_llog_cleanup, rc);
5271         }
5272
5273         rc = mdt_procfs_init(m, dev);
5274         if (rc) {
5275                 CERROR("Can't init MDT lprocfs, rc %d\n", rc);
5276                 GOTO(err_recovery, rc);
5277         }
5278
5279         rc = mdt_quota_init(env, m, cfg);
5280         if (rc)
5281                 GOTO(err_procfs, rc);
5282
5283         rc = mdt_start_ptlrpc_service(m);
5284         if (rc)
5285                 GOTO(err_quota, rc);
5286
5287         ping_evictor_start();
5288
5289         /* recovery will be started upon mdt_prepare()
5290          * when the whole stack is complete and ready
5291          * to serve the requests */
5292
5293         mdt_init_capa_ctxt(env, m);
5294
5295         /* Reduce the initial timeout on an MDS because it doesn't need such
5296          * a long timeout as an OST does. Adaptive timeouts will adjust this
5297          * value appropriately. */
5298         if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
5299                 ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
5300
5301         RETURN(0);
5302
5303         ping_evictor_stop();
5304         mdt_stop_ptlrpc_service(m);
5305 err_quota:
5306         mdt_quota_fini(env, m);
5307 err_procfs:
5308         mdt_procfs_fini(m);
5309 err_recovery:
5310         target_recovery_fini(obd);
5311         upcall_cache_cleanup(m->mdt_identity_cache);
5312         m->mdt_identity_cache = NULL;
5313 err_llog_cleanup:
5314         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
5315         mdt_fs_cleanup(env, m);
5316 err_capa:
5317         cfs_timer_disarm(&m->mdt_ck_timer);
5318         mdt_ck_thread_stop(m);
5319 err_free_ns:
5320         ldlm_namespace_free(m->mdt_namespace, NULL, 0);
5321         obd->obd_namespace = m->mdt_namespace = NULL;
5322 err_fini_seq:
5323         mdt_seq_fini(env, m);
5324         mdt_fld_fini(env, m);
5325         tgt_fini(env, &m->mdt_lut);
5326 err_fini_stack:
5327         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
5328 err_lmi:
5329         if (lmi)
5330                 server_put_mount(dev, lmi->lmi_mnt);
5331         return (rc);
5332 }
5333
5334 /* For interoperability between 1.8 and 2.0. */
5335 static struct cfg_interop_param mdt_interop_param[] = {
5336         { "mdt.group_upcall",   NULL },
5337         { "mdt.quota_type",     "mdd.quota_type" },
5338         { "mdt.rootsquash",     "mdt.root_squash" },
5339         { "mdt.nosquash_nid",   "mdt.nosquash_nids" },
5340         { NULL }
5341 };
5342
5343 /* used by MGS to process specific configurations */
5344 static int mdt_process_config(const struct lu_env *env,
5345                               struct lu_device *d, struct lustre_cfg *cfg)
5346 {
5347         struct mdt_device *m = mdt_dev(d);
5348         struct md_device *md_next = m->mdt_child;
5349         struct lu_device *next = md2lu_dev(md_next);
5350         int rc = 0;
5351         ENTRY;
5352
5353         switch (cfg->lcfg_command) {
5354         case LCFG_PARAM: {
5355                 struct lprocfs_static_vars  lvars;
5356                 struct obd_device          *obd = d->ld_obd;
5357
5358                 /* For interoperability between 1.8 and 2.0. */
5359                 struct cfg_interop_param   *ptr = NULL;
5360                 struct lustre_cfg          *old_cfg = NULL;
5361                 char                       *param = NULL;
5362
5363                 param = lustre_cfg_string(cfg, 1);
5364                 if (param == NULL) {
5365                         CERROR("param is empty\n");
5366                         rc = -EINVAL;
5367                         break;
5368                 }
5369
5370                 ptr = class_find_old_param(param, mdt_interop_param);
5371                 if (ptr != NULL) {
5372                         if (ptr->new_param == NULL) {
5373                                 CWARN("For 1.8 interoperability, skip this %s."
5374                                       " It is obsolete.\n", ptr->old_param);
5375                                         break;
5376                         }
5377
5378                         CWARN("Found old param %s, changed it to %s.\n",
5379                               ptr->old_param, ptr->new_param);
5380
5381                         old_cfg = cfg;
5382                         cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
5383                         if (IS_ERR(cfg)) {
5384                                 rc = PTR_ERR(cfg);
5385                                 break;
5386                         }
5387                 }
5388
5389                 lprocfs_mdt_init_vars(&lvars);
5390                 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars,
5391                                               cfg, obd);
5392                 if (rc > 0 || rc == -ENOSYS)
5393                         /* we don't understand; pass it on */
5394                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
5395
5396                 if (old_cfg != NULL)
5397                         lustre_cfg_free(cfg);
5398
5399                 break;
5400         }
5401         case LCFG_ADD_MDC:
5402                 /*
5403                  * Add mdc hook to get first MDT uuid and connect it to
5404                  * ls->controller to use for seq manager.
5405                  */
5406                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5407                 if (rc)
5408                         CERROR("Can't add mdc, rc %d\n", rc);
5409                 else
5410                         rc = mdt_seq_init_cli(env, mdt_dev(d), cfg);
5411                 break;
5412         default:
5413                 /* others are passed further */
5414                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5415                 break;
5416         }
5417         RETURN(rc);
5418 }
5419
5420 static struct lu_object *mdt_object_alloc(const struct lu_env *env,
5421                                           const struct lu_object_header *hdr,
5422                                           struct lu_device *d)
5423 {
5424         struct mdt_object *mo;
5425
5426         ENTRY;
5427
5428         OBD_SLAB_ALLOC_PTR_GFP(mo, mdt_object_kmem, CFS_ALLOC_IO);
5429         if (mo != NULL) {
5430                 struct lu_object *o;
5431                 struct lu_object_header *h;
5432
5433                 o = &mo->mot_obj.mo_lu;
5434                 h = &mo->mot_header;
5435                 lu_object_header_init(h);
5436                 lu_object_init(o, h, d);
5437                 lu_object_add_top(h, o);
5438                 o->lo_ops = &mdt_obj_ops;
5439                 cfs_mutex_init(&mo->mot_ioepoch_mutex);
5440                 cfs_mutex_init(&mo->mot_lov_mutex);
5441                 RETURN(o);
5442         } else
5443                 RETURN(NULL);
5444 }
5445
5446 static int mdt_object_init(const struct lu_env *env, struct lu_object *o,
5447                            const struct lu_object_conf *unused)
5448 {
5449         struct mdt_device *d = mdt_dev(o->lo_dev);
5450         struct lu_device  *under;
5451         struct lu_object  *below;
5452         int                rc = 0;
5453         ENTRY;
5454
5455         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
5456                PFID(lu_object_fid(o)));
5457
5458         under = &d->mdt_child->md_lu_dev;
5459         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
5460         if (below != NULL) {
5461                 lu_object_add(o, below);
5462         } else
5463                 rc = -ENOMEM;
5464
5465         RETURN(rc);
5466 }
5467
5468 static void mdt_object_free(const struct lu_env *env, struct lu_object *o)
5469 {
5470         struct mdt_object *mo = mdt_obj(o);
5471         struct lu_object_header *h;
5472         ENTRY;
5473
5474         h = o->lo_header;
5475         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
5476                PFID(lu_object_fid(o)));
5477
5478         lu_object_fini(o);
5479         lu_object_header_fini(h);
5480         OBD_SLAB_FREE_PTR(mo, mdt_object_kmem);
5481
5482         EXIT;
5483 }
5484
5485 static int mdt_object_print(const struct lu_env *env, void *cookie,
5486                             lu_printer_t p, const struct lu_object *o)
5487 {
5488         struct mdt_object *mdto = mdt_obj((struct lu_object *)o);
5489         return (*p)(env, cookie, LUSTRE_MDT_NAME"-object@%p(ioepoch="LPU64" "
5490                     "flags="LPX64", epochcount=%d, writecount=%d)",
5491                     mdto, mdto->mot_ioepoch, mdto->mot_flags,
5492                     mdto->mot_ioepoch_count, mdto->mot_writecount);
5493 }
5494
5495 static int mdt_prepare(const struct lu_env *env,
5496                 struct lu_device *pdev,
5497                 struct lu_device *cdev)
5498 {
5499         struct mdt_device *mdt = mdt_dev(cdev);
5500         struct lu_device *next = &mdt->mdt_child->md_lu_dev;
5501         struct obd_device *obd = cdev->ld_obd;
5502         int rc;
5503
5504         ENTRY;
5505
5506         LASSERT(obd);
5507
5508         rc = next->ld_ops->ldo_prepare(env, cdev, next);
5509         if (rc)
5510                 RETURN(rc);
5511
5512         rc = mdt_llog_ctxt_clone(env, mdt, LLOG_CHANGELOG_ORIG_CTXT);
5513         if (rc)
5514                 RETURN(rc);
5515
5516         rc = mdt_fld_init(env, obd->obd_name, mdt);
5517         if (rc)
5518                 RETURN(rc);
5519
5520         rc = mdt_seq_init(env, obd->obd_name, mdt);
5521         if (rc)
5522                 RETURN(rc);
5523
5524         rc = mdt->mdt_child->md_ops->mdo_root_get(env, mdt->mdt_child,
5525                                                   &mdt->mdt_md_root_fid);
5526         if (rc)
5527                 RETURN(rc);
5528
5529         LASSERT(!cfs_test_bit(MDT_FL_CFGLOG, &mdt->mdt_state));
5530         target_recovery_init(&mdt->mdt_lut, mdt_recovery_handle);
5531         cfs_set_bit(MDT_FL_CFGLOG, &mdt->mdt_state);
5532         LASSERT(obd->obd_no_conn);
5533         cfs_spin_lock(&obd->obd_dev_lock);
5534         obd->obd_no_conn = 0;
5535         cfs_spin_unlock(&obd->obd_dev_lock);
5536
5537         if (obd->obd_recovering == 0)
5538                 mdt_postrecov(env, mdt);
5539
5540         RETURN(rc);
5541 }
5542
5543 static const struct lu_device_operations mdt_lu_ops = {
5544         .ldo_object_alloc   = mdt_object_alloc,
5545         .ldo_process_config = mdt_process_config,
5546         .ldo_prepare        = mdt_prepare,
5547 };
5548
5549 static const struct lu_object_operations mdt_obj_ops = {
5550         .loo_object_init    = mdt_object_init,
5551         .loo_object_free    = mdt_object_free,
5552         .loo_object_print   = mdt_object_print
5553 };
5554
5555 static int mdt_obd_set_info_async(const struct lu_env *env,
5556                                   struct obd_export *exp,
5557                                   __u32 keylen, void *key,
5558                                   __u32 vallen, void *val,
5559                                   struct ptlrpc_request_set *set)
5560 {
5561         struct obd_device     *obd = exp->exp_obd;
5562         int                    rc;
5563         ENTRY;
5564
5565         LASSERT(obd);
5566
5567         if (KEY_IS(KEY_SPTLRPC_CONF)) {
5568                 rc = mdt_adapt_sptlrpc_conf(obd, 0);
5569                 RETURN(rc);
5570         }
5571
5572         RETURN(0);
5573 }
5574
5575 /* mds_connect_internal */
5576 static int mdt_connect_internal(struct obd_export *exp,
5577                                 struct mdt_device *mdt,
5578                                 struct obd_connect_data *data)
5579 {
5580         if (data != NULL) {
5581                 data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
5582                 data->ocd_ibits_known &= MDS_INODELOCK_FULL;
5583
5584                 /* If no known bits (which should not happen, probably,
5585                    as everybody should support LOOKUP and UPDATE bits at least)
5586                    revert to compat mode with plain locks. */
5587                 if (!data->ocd_ibits_known &&
5588                     data->ocd_connect_flags & OBD_CONNECT_IBITS)
5589                         data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
5590
5591                 if (!mdt->mdt_opts.mo_acl)
5592                         data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
5593
5594                 if (!mdt->mdt_opts.mo_user_xattr)
5595                         data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
5596
5597                 if (!mdt->mdt_som_conf)
5598                         data->ocd_connect_flags &= ~OBD_CONNECT_SOM;
5599
5600                 if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
5601                         data->ocd_brw_size = min(data->ocd_brw_size,
5602                                (__u32)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
5603                         if (data->ocd_brw_size == 0) {
5604                                 CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
5605                                        " ocd_version: %x ocd_grant: %d "
5606                                        "ocd_index: %u ocd_brw_size is "
5607                                        "unexpectedly zero, network data "
5608                                        "corruption? Refusing connection of this"
5609                                        " client\n",
5610                                        exp->exp_obd->obd_name,
5611                                        exp->exp_client_uuid.uuid,
5612                                        exp, data->ocd_connect_flags, data->ocd_version,
5613                                        data->ocd_grant, data->ocd_index);
5614                                 return -EPROTO;
5615                         }
5616                 }
5617
5618                 cfs_spin_lock(&exp->exp_lock);
5619                 exp->exp_connect_flags = data->ocd_connect_flags;
5620                 cfs_spin_unlock(&exp->exp_lock);
5621                 data->ocd_version = LUSTRE_VERSION_CODE;
5622                 exp->exp_mdt_data.med_ibits_known = data->ocd_ibits_known;
5623         }
5624
5625 #if 0
5626         if (mdt->mdt_opts.mo_acl &&
5627             ((exp->exp_connect_flags & OBD_CONNECT_ACL) == 0)) {
5628                 CWARN("%s: MDS requires ACL support but client does not\n",
5629                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5630                 return -EBADE;
5631         }
5632 #endif
5633
5634         if ((exp->exp_connect_flags & OBD_CONNECT_FID) == 0) {
5635                 CWARN("%s: MDS requires FID support, but client not\n",
5636                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5637                 return -EBADE;
5638         }
5639
5640         if (mdt->mdt_som_conf && !exp_connect_som(exp) &&
5641             !(exp->exp_connect_flags & OBD_CONNECT_MDS_MDS)) {
5642                 CWARN("%s: MDS has SOM enabled, but client does not support "
5643                       "it\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5644                 return -EBADE;
5645         }
5646
5647         return 0;
5648 }
5649
5650 static int mdt_connect_check_sptlrpc(struct mdt_device *mdt,
5651                                      struct obd_export *exp,
5652                                      struct ptlrpc_request *req)
5653 {
5654         struct sptlrpc_flavor   flvr;
5655         int                     rc = 0;
5656
5657         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
5658                 cfs_read_lock(&mdt->mdt_sptlrpc_lock);
5659                 sptlrpc_target_choose_flavor(&mdt->mdt_sptlrpc_rset,
5660                                              req->rq_sp_from,
5661                                              req->rq_peer.nid,
5662                                              &flvr);
5663                 cfs_read_unlock(&mdt->mdt_sptlrpc_lock);
5664
5665                 cfs_spin_lock(&exp->exp_lock);
5666
5667                 exp->exp_sp_peer = req->rq_sp_from;
5668                 exp->exp_flvr = flvr;
5669
5670                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
5671                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
5672                         CERROR("unauthorized rpc flavor %x from %s, "
5673                                "expect %x\n", req->rq_flvr.sf_rpc,
5674                                libcfs_nid2str(req->rq_peer.nid),
5675                                exp->exp_flvr.sf_rpc);
5676                         rc = -EACCES;
5677                 }
5678
5679                 cfs_spin_unlock(&exp->exp_lock);
5680         } else {
5681                 if (exp->exp_sp_peer != req->rq_sp_from) {
5682                         CERROR("RPC source %s doesn't match %s\n",
5683                                sptlrpc_part2name(req->rq_sp_from),
5684                                sptlrpc_part2name(exp->exp_sp_peer));
5685                         rc = -EACCES;
5686                 } else {
5687                         rc = sptlrpc_target_export_check(exp, req);
5688                 }
5689         }
5690
5691         return rc;
5692 }
5693
5694 /* mds_connect copy */
5695 static int mdt_obd_connect(const struct lu_env *env,
5696                            struct obd_export **exp, struct obd_device *obd,
5697                            struct obd_uuid *cluuid,
5698                            struct obd_connect_data *data,
5699                            void *localdata)
5700 {
5701         struct mdt_thread_info *info;
5702         struct obd_export      *lexp;
5703         struct lustre_handle    conn = { 0 };
5704         struct mdt_device      *mdt;
5705         struct ptlrpc_request  *req;
5706         int                     rc;
5707         ENTRY;
5708
5709         LASSERT(env != NULL);
5710         if (!exp || !obd || !cluuid)
5711                 RETURN(-EINVAL);
5712
5713         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5714         req = info->mti_pill->rc_req;
5715         mdt = mdt_dev(obd->obd_lu_dev);
5716
5717         /*
5718          * first, check whether the stack is ready to handle requests
5719          * XXX: probably not very appropriate method is used now
5720          *      at some point we should find a better one
5721          */
5722         if (!cfs_test_bit(MDT_FL_SYNCED, &mdt->mdt_state)) {
5723                 rc = obd_health_check(env, mdt->mdt_child_exp->exp_obd);
5724                 if (rc)
5725                         RETURN(-EAGAIN);
5726                 cfs_set_bit(MDT_FL_SYNCED, &mdt->mdt_state);
5727         }
5728
5729         rc = class_connect(&conn, obd, cluuid);
5730         if (rc)
5731                 RETURN(rc);
5732
5733         lexp = class_conn2export(&conn);
5734         LASSERT(lexp != NULL);
5735
5736         rc = mdt_connect_check_sptlrpc(mdt, lexp, req);
5737         if (rc)
5738                 GOTO(out, rc);
5739
5740         if (OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
5741                 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
5742
5743         rc = mdt_connect_internal(lexp, mdt, data);
5744         if (rc == 0) {
5745                 struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
5746
5747                 LASSERT(lcd);
5748                 info->mti_exp = lexp;
5749                 memcpy(lcd->lcd_uuid, cluuid, sizeof lcd->lcd_uuid);
5750                 rc = tgt_client_new(env, lexp);
5751                 if (rc == 0)
5752                         mdt_export_stats_init(obd, lexp, localdata);
5753         }
5754
5755 out:
5756         if (rc != 0) {
5757                 class_disconnect(lexp);
5758                 *exp = NULL;
5759         } else {
5760                 *exp = lexp;
5761         }
5762
5763         RETURN(rc);
5764 }
5765
5766 static int mdt_obd_reconnect(const struct lu_env *env,
5767                              struct obd_export *exp, struct obd_device *obd,
5768                              struct obd_uuid *cluuid,
5769                              struct obd_connect_data *data,
5770                              void *localdata)
5771 {
5772         struct mdt_thread_info *info;
5773         struct mdt_device      *mdt;
5774         struct ptlrpc_request  *req;
5775         int                     rc;
5776         ENTRY;
5777
5778         if (exp == NULL || obd == NULL || cluuid == NULL)
5779                 RETURN(-EINVAL);
5780
5781         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5782         req = info->mti_pill->rc_req;
5783         mdt = mdt_dev(obd->obd_lu_dev);
5784
5785         rc = mdt_connect_check_sptlrpc(mdt, exp, req);
5786         if (rc)
5787                 RETURN(rc);
5788
5789         rc = mdt_connect_internal(exp, mdt_dev(obd->obd_lu_dev), data);
5790         if (rc == 0)
5791                 mdt_export_stats_init(obd, exp, localdata);
5792
5793         RETURN(rc);
5794 }
5795
5796 static int mdt_export_cleanup(struct obd_export *exp)
5797 {
5798         struct mdt_export_data *med = &exp->exp_mdt_data;
5799         struct obd_device      *obd = exp->exp_obd;
5800         struct mdt_device      *mdt;
5801         struct mdt_thread_info *info;
5802         struct lu_env           env;
5803         CFS_LIST_HEAD(closing_list);
5804         struct mdt_file_data *mfd, *n;
5805         int rc = 0;
5806         ENTRY;
5807
5808         cfs_spin_lock(&med->med_open_lock);
5809         while (!cfs_list_empty(&med->med_open_head)) {
5810                 cfs_list_t *tmp = med->med_open_head.next;
5811                 mfd = cfs_list_entry(tmp, struct mdt_file_data, mfd_list);
5812
5813                 /* Remove mfd handle so it can't be found again.
5814                  * We are consuming the mfd_list reference here. */
5815                 class_handle_unhash(&mfd->mfd_handle);
5816                 cfs_list_move_tail(&mfd->mfd_list, &closing_list);
5817         }
5818         cfs_spin_unlock(&med->med_open_lock);
5819         mdt = mdt_dev(obd->obd_lu_dev);
5820         LASSERT(mdt != NULL);
5821
5822         rc = lu_env_init(&env, LCT_MD_THREAD);
5823         if (rc)
5824                 RETURN(rc);
5825
5826         info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
5827         LASSERT(info != NULL);
5828         memset(info, 0, sizeof *info);
5829         info->mti_env = &env;
5830         info->mti_mdt = mdt;
5831         info->mti_exp = exp;
5832
5833         if (!cfs_list_empty(&closing_list)) {
5834                 struct md_attr *ma = &info->mti_attr;
5835
5836                 /* Close any open files (which may also cause orphan unlinking). */
5837                 cfs_list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
5838                         cfs_list_del_init(&mfd->mfd_list);
5839                         ma->ma_need = ma->ma_valid = 0;
5840                         /* Don't unlink orphan on failover umount, LU-184 */
5841                         if (exp->exp_flags & OBD_OPT_FAILOVER) {
5842                                 ma->ma_valid = MA_FLAGS;
5843                                 ma->ma_attr_flags |= MDS_KEEP_ORPHAN;
5844                         }
5845                         mdt_mfd_close(info, mfd);
5846                 }
5847         }
5848         info->mti_mdt = NULL;
5849         /* cleanup client slot early */
5850         /* Do not erase record for recoverable client. */
5851         if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
5852                 tgt_client_del(&env, exp);
5853         lu_env_fini(&env);
5854
5855         RETURN(rc);
5856 }
5857
5858 static int mdt_obd_disconnect(struct obd_export *exp)
5859 {
5860         int rc;
5861         ENTRY;
5862
5863         LASSERT(exp);
5864         class_export_get(exp);
5865
5866         rc = server_disconnect_export(exp);
5867         if (rc != 0)
5868                 CDEBUG(D_IOCTL, "server disconnect error: %d\n", rc);
5869
5870         rc = mdt_export_cleanup(exp);
5871         class_export_put(exp);
5872         RETURN(rc);
5873 }
5874
5875 /* FIXME: Can we avoid using these two interfaces? */
5876 static int mdt_init_export(struct obd_export *exp)
5877 {
5878         struct mdt_export_data *med = &exp->exp_mdt_data;
5879         int                     rc;
5880         ENTRY;
5881
5882         CFS_INIT_LIST_HEAD(&med->med_open_head);
5883         cfs_spin_lock_init(&med->med_open_lock);
5884         cfs_mutex_init(&med->med_idmap_mutex);
5885         med->med_idmap = NULL;
5886         cfs_spin_lock(&exp->exp_lock);
5887         exp->exp_connecting = 1;
5888         cfs_spin_unlock(&exp->exp_lock);
5889
5890         /* self-export doesn't need client data and ldlm initialization */
5891         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5892                                      &exp->exp_client_uuid)))
5893                 RETURN(0);
5894
5895         rc = tgt_client_alloc(exp);
5896         if (rc)
5897                 GOTO(err, rc);
5898
5899         rc = ldlm_init_export(exp);
5900         if (rc)
5901                 GOTO(err_free, rc);
5902
5903         RETURN(rc);
5904
5905 err_free:
5906         tgt_client_free(exp);
5907 err:
5908         CERROR("%s: Failed to initialize export: rc = %d\n",
5909                exp->exp_obd->obd_name, rc);
5910         return rc;
5911 }
5912
5913 static int mdt_destroy_export(struct obd_export *exp)
5914 {
5915         ENTRY;
5916
5917         if (exp_connect_rmtclient(exp))
5918                 mdt_cleanup_idmap(&exp->exp_mdt_data);
5919
5920         target_destroy_export(exp);
5921         /* destroy can be called from failed obd_setup, so
5922          * checking uuid is safer than obd_self_export */
5923         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5924                                      &exp->exp_client_uuid)))
5925                 RETURN(0);
5926
5927         ldlm_destroy_export(exp);
5928         tgt_client_free(exp);
5929
5930         LASSERT(cfs_list_empty(&exp->exp_outstanding_replies));
5931         LASSERT(cfs_list_empty(&exp->exp_mdt_data.med_open_head));
5932
5933         RETURN(0);
5934 }
5935
5936 static int mdt_rpc_fid2path(struct mdt_thread_info *info, void *key,
5937                             void *val, int vallen)
5938 {
5939         struct mdt_device *mdt = mdt_dev(info->mti_exp->exp_obd->obd_lu_dev);
5940         struct getinfo_fid2path *fpout, *fpin;
5941         int rc = 0;
5942
5943         fpin = key + cfs_size_round(sizeof(KEY_FID2PATH));
5944         fpout = val;
5945
5946         if (ptlrpc_req_need_swab(info->mti_pill->rc_req))
5947                 lustre_swab_fid2path(fpin);
5948
5949         memcpy(fpout, fpin, sizeof(*fpin));
5950         if (fpout->gf_pathlen != vallen - sizeof(*fpin))
5951                 RETURN(-EINVAL);
5952
5953         rc = mdt_fid2path(info->mti_env, mdt, fpout);
5954         RETURN(rc);
5955 }
5956
5957 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
5958                         struct getinfo_fid2path *fp)
5959 {
5960         struct mdt_object *obj;
5961         int    rc;
5962         ENTRY;
5963
5964         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
5965                PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
5966
5967         if (!fid_is_sane(&fp->gf_fid))
5968                 RETURN(-EINVAL);
5969
5970         obj = mdt_object_find(env, mdt, &fp->gf_fid);
5971         if (obj == NULL || IS_ERR(obj)) {
5972                 CDEBUG(D_IOCTL, "no object "DFID": %ld\n", PFID(&fp->gf_fid),
5973                        PTR_ERR(obj));
5974                 RETURN(-EINVAL);
5975         }
5976
5977         rc = lu_object_exists(&obj->mot_obj.mo_lu);
5978         if (rc <= 0) {
5979                 if (rc == -1)
5980                         rc = -EREMOTE;
5981                 else
5982                         rc = -ENOENT;
5983                 mdt_object_put(env, obj);
5984                 CDEBUG(D_IOCTL, "nonlocal object "DFID": %d\n",
5985                        PFID(&fp->gf_fid), rc);
5986                 RETURN(rc);
5987         }
5988
5989         rc = mo_path(env, md_object_next(&obj->mot_obj), fp->gf_path,
5990                      fp->gf_pathlen, &fp->gf_recno, &fp->gf_linkno);
5991         mdt_object_put(env, obj);
5992
5993         RETURN(rc);
5994 }
5995
5996 static int mdt_get_info(struct mdt_thread_info *info)
5997 {
5998         struct ptlrpc_request *req = mdt_info_req(info);
5999         char *key;
6000         int keylen;
6001         __u32 *vallen;
6002         void *valout;
6003         int rc;
6004         ENTRY;
6005
6006         key = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_KEY);
6007         if (key == NULL) {
6008                 CDEBUG(D_IOCTL, "No GETINFO key");
6009                 RETURN(-EFAULT);
6010         }
6011         keylen = req_capsule_get_size(info->mti_pill, &RMF_GETINFO_KEY,
6012                                       RCL_CLIENT);
6013
6014         vallen = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_VALLEN);
6015         if (vallen == NULL) {
6016                 CDEBUG(D_IOCTL, "Unable to get RMF_GETINFO_VALLEN buffer");
6017                 RETURN(-EFAULT);
6018         }
6019
6020         req_capsule_set_size(info->mti_pill, &RMF_GETINFO_VAL, RCL_SERVER,
6021                              *vallen);
6022         rc = req_capsule_server_pack(info->mti_pill);
6023         valout = req_capsule_server_get(info->mti_pill, &RMF_GETINFO_VAL);
6024         if (valout == NULL) {
6025                 CDEBUG(D_IOCTL, "Unable to get get-info RPC out buffer");
6026                 RETURN(-EFAULT);
6027         }
6028
6029         if (KEY_IS(KEY_FID2PATH))
6030                 rc = mdt_rpc_fid2path(info, key, valout, *vallen);
6031         else
6032                 rc = -EINVAL;
6033
6034         lustre_msg_set_status(req->rq_repmsg, rc);
6035
6036         RETURN(rc);
6037 }
6038
6039 /* Pass the ioc down */
6040 static int mdt_ioc_child(struct lu_env *env, struct mdt_device *mdt,
6041                          unsigned int cmd, int len, void *data)
6042 {
6043         struct lu_context ioctl_session;
6044         struct md_device *next = mdt->mdt_child;
6045         int rc;
6046         ENTRY;
6047
6048         rc = lu_context_init(&ioctl_session, LCT_SESSION);
6049         if (rc)
6050                 RETURN(rc);
6051         ioctl_session.lc_thread = (struct ptlrpc_thread *)cfs_current();
6052         lu_context_enter(&ioctl_session);
6053         env->le_ses = &ioctl_session;
6054
6055         LASSERT(next->md_ops->mdo_iocontrol);
6056         rc = next->md_ops->mdo_iocontrol(env, next, cmd, len, data);
6057
6058         lu_context_exit(&ioctl_session);
6059         lu_context_fini(&ioctl_session);
6060         RETURN(rc);
6061 }
6062
6063 static int mdt_ioc_version_get(struct mdt_thread_info *mti, void *karg)
6064 {
6065         struct obd_ioctl_data *data = karg;
6066         struct lu_fid *fid = (struct lu_fid *)data->ioc_inlbuf1;
6067         __u64 version;
6068         struct mdt_object *obj;
6069         struct mdt_lock_handle  *lh;
6070         int rc;
6071         ENTRY;
6072
6073         CDEBUG(D_IOCTL, "getting version for "DFID"\n", PFID(fid));
6074         if (!fid_is_sane(fid))
6075                 RETURN(-EINVAL);
6076
6077         lh = &mti->mti_lh[MDT_LH_PARENT];
6078         mdt_lock_reg_init(lh, LCK_CR);
6079
6080         obj = mdt_object_find_lock(mti, fid, lh, MDS_INODELOCK_UPDATE);
6081         if (IS_ERR(obj))
6082                 RETURN(PTR_ERR(obj));
6083
6084         rc = mdt_object_exists(obj);
6085         if (rc < 0) {
6086                 rc = -EREMOTE;
6087                 /**
6088                  * before calling version get the correct MDS should be
6089                  * fid, this is error to find remote object here
6090                  */
6091                 CERROR("nonlocal object "DFID"\n", PFID(fid));
6092         } else if (rc == 0) {
6093                 *(__u64 *)data->ioc_inlbuf2 = ENOENT_VERSION;
6094                 rc = -ENOENT;
6095         } else {
6096                 version = dt_version_get(mti->mti_env, mdt_obj2dt(obj));
6097                *(__u64 *)data->ioc_inlbuf2 = version;
6098                 rc = 0;
6099         }
6100         mdt_object_unlock_put(mti, obj, lh, 1);
6101         RETURN(rc);
6102 }
6103
6104 /* ioctls on obd dev */
6105 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
6106                          void *karg, void *uarg)
6107 {
6108         struct lu_env      env;
6109         struct obd_device *obd = exp->exp_obd;
6110         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
6111         struct dt_device  *dt = mdt->mdt_bottom;
6112         int rc;
6113
6114         ENTRY;
6115         CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
6116         rc = lu_env_init(&env, LCT_MD_THREAD);
6117         if (rc)
6118                 RETURN(rc);
6119
6120         switch (cmd) {
6121         case OBD_IOC_SYNC:
6122                 rc = mdt_device_sync(&env, mdt);
6123                 break;
6124         case OBD_IOC_SET_READONLY:
6125                 rc = dt->dd_ops->dt_ro(&env, dt);
6126                 break;
6127         case OBD_IOC_ABORT_RECOVERY:
6128                 CERROR("Aborting recovery for device %s\n", obd->obd_name);
6129                 target_stop_recovery_thread(obd);
6130                 rc = 0;
6131                 break;
6132         case OBD_IOC_CHANGELOG_REG:
6133         case OBD_IOC_CHANGELOG_DEREG:
6134         case OBD_IOC_CHANGELOG_CLEAR:
6135                 rc = mdt_ioc_child(&env, mdt, cmd, len, karg);
6136                 break;
6137         case OBD_IOC_START_LFSCK:
6138         case OBD_IOC_STOP_LFSCK: {
6139                 struct md_device *next = mdt->mdt_child;
6140                 struct obd_ioctl_data *data = karg;
6141
6142                 if (unlikely(data == NULL)) {
6143                         rc = -EINVAL;
6144                         break;
6145                 }
6146
6147                 rc = next->md_ops->mdo_iocontrol(&env, next, cmd,
6148                                                  data->ioc_inllen1,
6149                                                  data->ioc_inlbuf1);
6150                 break;
6151         }
6152         case OBD_IOC_GET_OBJ_VERSION: {
6153                 struct mdt_thread_info *mti;
6154                 mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
6155                 memset(mti, 0, sizeof *mti);
6156                 mti->mti_env = &env;
6157                 mti->mti_mdt = mdt;
6158                 mti->mti_exp = exp;
6159
6160                 rc = mdt_ioc_version_get(mti, karg);
6161                 break;
6162         }
6163         default:
6164                 CERROR("Not supported cmd = %d for device %s\n",
6165                        cmd, obd->obd_name);
6166                 rc = -EOPNOTSUPP;
6167         }
6168
6169         lu_env_fini(&env);
6170         RETURN(rc);
6171 }
6172
6173 int mdt_postrecov(const struct lu_env *env, struct mdt_device *mdt)
6174 {
6175         struct lu_device *ld = md2lu_dev(mdt->mdt_child);
6176         int rc;
6177         ENTRY;
6178
6179         rc = ld->ld_ops->ldo_recovery_complete(env, ld);
6180         RETURN(rc);
6181 }
6182
6183 int mdt_obd_postrecov(struct obd_device *obd)
6184 {
6185         struct lu_env env;
6186         int rc;
6187
6188         rc = lu_env_init(&env, LCT_MD_THREAD);
6189         if (rc)
6190                 RETURN(rc);
6191         rc = mdt_postrecov(&env, mdt_dev(obd->obd_lu_dev));
6192         lu_env_fini(&env);
6193         return rc;
6194 }
6195
6196 /**
6197  * Send a copytool req to a client
6198  * Note this sends a request RPC from a server (MDT) to a client (MDC),
6199  * backwards of normal comms.
6200  */
6201 int mdt_hsm_copytool_send(struct obd_export *exp)
6202 {
6203         struct kuc_hdr *lh;
6204         struct hsm_action_list *hal;
6205         struct hsm_action_item *hai;
6206         int rc, len;
6207         ENTRY;
6208
6209         CWARN("%s: writing to mdc at %s\n", exp->exp_obd->obd_name,
6210               libcfs_nid2str(exp->exp_connection->c_peer.nid));
6211
6212         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
6213                 /* for mockup below */ 2 * cfs_size_round(sizeof(*hai));
6214         OBD_ALLOC(lh, len);
6215         if (lh == NULL)
6216                 RETURN(-ENOMEM);
6217
6218         lh->kuc_magic = KUC_MAGIC;
6219         lh->kuc_transport = KUC_TRANSPORT_HSM;
6220         lh->kuc_msgtype = HMT_ACTION_LIST;
6221         lh->kuc_msglen = len;
6222
6223         hal = (struct hsm_action_list *)(lh + 1);
6224         hal->hal_version = HAL_VERSION;
6225         hal->hal_archive_num = 1;
6226         obd_uuid2fsname(hal->hal_fsname, exp->exp_obd->obd_name,
6227                         MTI_NAME_MAXLEN);
6228
6229         /* mock up an action list */
6230         hal->hal_count = 2;
6231         hai = hai_zero(hal);
6232         hai->hai_action = HSMA_ARCHIVE;
6233         hai->hai_fid.f_oid = 0xA00A;
6234         hai->hai_len = sizeof(*hai);
6235         hai = hai_next(hai);
6236         hai->hai_action = HSMA_RESTORE;
6237         hai->hai_fid.f_oid = 0xB00B;
6238         hai->hai_len = sizeof(*hai);
6239
6240         /* Uses the ldlm reverse import; this rpc will be seen by
6241           the ldlm_callback_handler */
6242         rc = do_set_info_async(exp->exp_imp_reverse,
6243                                LDLM_SET_INFO, LUSTRE_OBD_VERSION,
6244                                sizeof(KEY_HSM_COPYTOOL_SEND),
6245                                KEY_HSM_COPYTOOL_SEND,
6246                                len, lh, NULL);
6247
6248         OBD_FREE(lh, len);
6249
6250         RETURN(rc);
6251 }
6252
6253 static struct obd_ops mdt_obd_device_ops = {
6254         .o_owner          = THIS_MODULE,
6255         .o_set_info_async = mdt_obd_set_info_async,
6256         .o_connect        = mdt_obd_connect,
6257         .o_reconnect      = mdt_obd_reconnect,
6258         .o_disconnect     = mdt_obd_disconnect,
6259         .o_init_export    = mdt_init_export,
6260         .o_destroy_export = mdt_destroy_export,
6261         .o_iocontrol      = mdt_iocontrol,
6262         .o_postrecov      = mdt_obd_postrecov,
6263 };
6264
6265 static struct lu_device* mdt_device_fini(const struct lu_env *env,
6266                                          struct lu_device *d)
6267 {
6268         struct mdt_device *m = mdt_dev(d);
6269         ENTRY;
6270
6271         mdt_fini(env, m);
6272         RETURN(NULL);
6273 }
6274
6275 static struct lu_device *mdt_device_free(const struct lu_env *env,
6276                                          struct lu_device *d)
6277 {
6278         struct mdt_device *m = mdt_dev(d);
6279         ENTRY;
6280
6281         md_device_fini(&m->mdt_md_dev);
6282         OBD_FREE_PTR(m);
6283         RETURN(NULL);
6284 }
6285
6286 static struct lu_device *mdt_device_alloc(const struct lu_env *env,
6287                                           struct lu_device_type *t,
6288                                           struct lustre_cfg *cfg)
6289 {
6290         struct lu_device  *l;
6291         struct mdt_device *m;
6292
6293         OBD_ALLOC_PTR(m);
6294         if (m != NULL) {
6295                 int rc;
6296
6297                 l = &m->mdt_md_dev.md_lu_dev;
6298                 rc = mdt_init0(env, m, t, cfg);
6299                 if (rc != 0) {
6300                         mdt_device_free(env, l);
6301                         l = ERR_PTR(rc);
6302                         return l;
6303                 }
6304         } else
6305                 l = ERR_PTR(-ENOMEM);
6306         return l;
6307 }
6308
6309 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
6310 LU_KEY_INIT(mdt, struct mdt_thread_info);
6311
6312 static void mdt_key_fini(const struct lu_context *ctx,
6313                          struct lu_context_key *key, void* data)
6314 {
6315         struct mdt_thread_info *info = data;
6316
6317         if (info->mti_big_lmm) {
6318                 OBD_FREE_LARGE(info->mti_big_lmm, info->mti_big_lmmsize);
6319                 info->mti_big_lmm = NULL;
6320                 info->mti_big_lmmsize = 0;
6321         }
6322         OBD_FREE_PTR(info);
6323 }
6324
6325 /* context key: mdt_thread_key */
6326 LU_CONTEXT_KEY_DEFINE(mdt, LCT_MD_THREAD);
6327
6328 struct md_ucred *mdt_ucred(const struct mdt_thread_info *info)
6329 {
6330         return md_ucred(info->mti_env);
6331 }
6332
6333 /**
6334  * Enable/disable COS (Commit On Sharing).
6335  *
6336  * Set/Clear the COS flag in mdt options.
6337  *
6338  * \param mdt mdt device
6339  * \param val 0 disables COS, other values enable COS
6340  */
6341 void mdt_enable_cos(struct mdt_device *mdt, int val)
6342 {
6343         struct lu_env env;
6344         int rc;
6345
6346         mdt->mdt_opts.mo_cos = !!val;
6347         rc = lu_env_init(&env, LCT_LOCAL);
6348         if (unlikely(rc != 0)) {
6349                 CWARN("lu_env initialization failed with rc = %d,"
6350                       "cannot sync\n", rc);
6351                 return;
6352         }
6353         mdt_device_sync(&env, mdt);
6354         lu_env_fini(&env);
6355 }
6356
6357 /**
6358  * Check COS (Commit On Sharing) status.
6359  *
6360  * Return COS flag status.
6361  *
6362  * \param mdt mdt device
6363  */
6364 int mdt_cos_is_enabled(struct mdt_device *mdt)
6365 {
6366         return mdt->mdt_opts.mo_cos != 0;
6367 }
6368
6369 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
6370 LU_TYPE_INIT_FINI(mdt, &mdt_thread_key);
6371
6372 static struct lu_device_type_operations mdt_device_type_ops = {
6373         .ldto_init = mdt_type_init,
6374         .ldto_fini = mdt_type_fini,
6375
6376         .ldto_start = mdt_type_start,
6377         .ldto_stop  = mdt_type_stop,
6378
6379         .ldto_device_alloc = mdt_device_alloc,
6380         .ldto_device_free  = mdt_device_free,
6381         .ldto_device_fini  = mdt_device_fini
6382 };
6383
6384 static struct lu_device_type mdt_device_type = {
6385         .ldt_tags     = LU_DEVICE_MD,
6386         .ldt_name     = LUSTRE_MDT_NAME,
6387         .ldt_ops      = &mdt_device_type_ops,
6388         .ldt_ctx_tags = LCT_MD_THREAD
6389 };
6390
6391 static int __init mdt_mod_init(void)
6392 {
6393         struct lprocfs_static_vars lvars;
6394         int rc;
6395
6396         rc = lu_kmem_init(mdt_caches);
6397         if (rc)
6398                 return rc;
6399
6400         if (mdt_num_threads != 0 && mds_num_threads == 0) {
6401                 LCONSOLE_INFO("mdt_num_threads module parameter is deprecated,"
6402                               "use mds_num_threads instead or unset both for"
6403                               "dynamic thread startup\n");
6404                 mds_num_threads = mdt_num_threads;
6405         }
6406
6407         lprocfs_mdt_init_vars(&lvars);
6408         rc = class_register_type(&mdt_obd_device_ops, NULL,
6409                                  lvars.module_vars, LUSTRE_MDT_NAME,
6410                                  &mdt_device_type);
6411
6412         if (rc)
6413                 lu_kmem_fini(mdt_caches);
6414         return rc;
6415 }
6416
6417 static void __exit mdt_mod_exit(void)
6418 {
6419         class_unregister_type(LUSTRE_MDT_NAME);
6420         lu_kmem_fini(mdt_caches);
6421 }
6422
6423 #define DEFINE_RPC_HANDLER(base, flags, opc, fn, fmt)                   \
6424 [opc - base] = {                                                        \
6425         .mh_name        = #opc,                                         \
6426         .mh_fail_id     = OBD_FAIL_ ## opc ## _NET,                     \
6427         .mh_opc         = opc,                                          \
6428         .mh_flags       = flags,                                        \
6429         .mh_act         = fn,                                           \
6430         .mh_fmt         = fmt                                           \
6431 }
6432
6433 /* Request with a format known in advance */
6434 #define DEF_MDT_HDL(flags, name, fn)                                    \
6435         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, &RQF_ ## name)
6436
6437 /* Request with a format we do not yet know */
6438 #define DEF_MDT_HDL_VAR(flags, name, fn)                                \
6439         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, NULL)
6440
6441 /* Map one non-standard request format handler.  This should probably get
6442  * a common OBD_SET_INFO RPC opcode instead of this mismatch. */
6443 #define RQF_MDS_SET_INFO RQF_OBD_SET_INFO
6444
6445 static struct mdt_handler mdt_mds_ops[] = {
6446 DEF_MDT_HDL(0,                          MDS_CONNECT,      mdt_connect),
6447 DEF_MDT_HDL(0,                          MDS_DISCONNECT,   mdt_disconnect),
6448 DEF_MDT_HDL(0,                          MDS_SET_INFO,     mdt_set_info),
6449 DEF_MDT_HDL(0,                          MDS_GET_INFO,     mdt_get_info),
6450 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_GETSTATUS,    mdt_getstatus),
6451 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETATTR,      mdt_getattr),
6452 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_GETATTR_NAME, mdt_getattr_name),
6453 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETXATTR,     mdt_getxattr),
6454 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_STATFS,       mdt_statfs),
6455 DEF_MDT_HDL(0           | MUTABOR,      MDS_REINT,        mdt_reint),
6456 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
6457 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
6458 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_PIN,          mdt_pin),
6459 DEF_MDT_HDL_VAR(0,                      MDS_SYNC,         mdt_sync),
6460 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_IS_SUBDIR,    mdt_is_subdir),
6461 DEF_MDT_HDL(0,                          MDS_QUOTACHECK,   mdt_quotacheck),
6462 DEF_MDT_HDL(0,                          MDS_QUOTACTL,     mdt_quotactl)
6463 };
6464
6465 #define DEF_OBD_HDL(flags, name, fn)                                    \
6466         DEFINE_RPC_HANDLER(OBD_PING, flags, name, fn, NULL)
6467
6468 static struct mdt_handler mdt_obd_ops[] = {
6469 DEF_OBD_HDL(0,                          OBD_PING,         mdt_obd_ping),
6470 DEF_OBD_HDL(0,                          OBD_LOG_CANCEL,   mdt_obd_log_cancel),
6471 DEF_OBD_HDL(0,                          OBD_QC_CALLBACK,  mdt_obd_qc_callback),
6472 DEF_OBD_HDL(0,                          OBD_IDX_READ,     mdt_obd_idx_read)
6473 };
6474
6475 #define DEF_DLM_HDL_VAR(flags, name, fn)                                \
6476         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, NULL)
6477 #define DEF_DLM_HDL(flags, name, fn)                                    \
6478         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, &RQF_ ## name)
6479
6480 static struct mdt_handler mdt_dlm_ops[] = {
6481 DEF_DLM_HDL    (HABEO_CLAVIS,           LDLM_ENQUEUE,     mdt_enqueue),
6482 DEF_DLM_HDL_VAR(HABEO_CLAVIS,           LDLM_CONVERT,     mdt_convert),
6483 DEF_DLM_HDL_VAR(0,                      LDLM_BL_CALLBACK, mdt_bl_callback),
6484 DEF_DLM_HDL_VAR(0,                      LDLM_CP_CALLBACK, mdt_cp_callback)
6485 };
6486
6487 #define DEF_LLOG_HDL(flags, name, fn)                                   \
6488         DEFINE_RPC_HANDLER(LLOG_ORIGIN_HANDLE_CREATE, flags, name, fn, NULL)
6489
6490 static struct mdt_handler mdt_llog_ops[] = {
6491 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CREATE,        mdt_llog_create),
6492 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_NEXT_BLOCK,    mdt_llog_next_block),
6493 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_READ_HEADER,   mdt_llog_read_header),
6494 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_WRITE_REC,     NULL),
6495 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CLOSE,         NULL),
6496 DEF_LLOG_HDL(0,         LLOG_ORIGIN_CONNECT,              NULL),
6497 DEF_LLOG_HDL(0,         LLOG_CATINFO,                     NULL),
6498 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_PREV_BLOCK,    mdt_llog_prev_block),
6499 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_DESTROY,       mdt_llog_destroy),
6500 };
6501
6502 #define DEF_SEC_HDL(flags, name, fn)                                    \
6503         DEFINE_RPC_HANDLER(SEC_CTX_INIT, flags, name, fn, NULL)
6504
6505 static struct mdt_handler mdt_sec_ctx_ops[] = {
6506 DEF_SEC_HDL(0,                          SEC_CTX_INIT,     mdt_sec_ctx_handle),
6507 DEF_SEC_HDL(0,                          SEC_CTX_INIT_CONT,mdt_sec_ctx_handle),
6508 DEF_SEC_HDL(0,                          SEC_CTX_FINI,     mdt_sec_ctx_handle)
6509 };
6510
6511 #define DEF_QUOTA_HDL(flags, name, fn)                          \
6512         DEFINE_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name)
6513
6514 static struct mdt_handler mdt_quota_ops[] = {
6515 DEF_QUOTA_HDL(HABEO_REFERO,             QUOTA_DQACQ,      mdt_quota_dqacq),
6516 };
6517
6518 static struct mdt_opc_slice mdt_regular_handlers[] = {
6519         {
6520                 .mos_opc_start = MDS_GETATTR,
6521                 .mos_opc_end   = MDS_LAST_OPC,
6522                 .mos_hs        = mdt_mds_ops
6523         },
6524         {
6525                 .mos_opc_start = OBD_PING,
6526                 .mos_opc_end   = OBD_LAST_OPC,
6527                 .mos_hs        = mdt_obd_ops
6528         },
6529         {
6530                 .mos_opc_start = LDLM_ENQUEUE,
6531                 .mos_opc_end   = LDLM_LAST_OPC,
6532                 .mos_hs        = mdt_dlm_ops
6533         },
6534         {
6535                 .mos_opc_start = LLOG_ORIGIN_HANDLE_CREATE,
6536                 .mos_opc_end   = LLOG_LAST_OPC,
6537                 .mos_hs        = mdt_llog_ops
6538         },
6539         {
6540                 .mos_opc_start = SEC_CTX_INIT,
6541                 .mos_opc_end   = SEC_LAST_OPC,
6542                 .mos_hs        = mdt_sec_ctx_ops
6543         },
6544         {
6545                 .mos_opc_start = QUOTA_DQACQ,
6546                 .mos_opc_end   = QUOTA_LAST_OPC,
6547                 .mos_hs        = mdt_quota_ops
6548         },
6549         {
6550                 .mos_hs        = NULL
6551         }
6552 };
6553
6554 /* Readpage/readdir handlers */
6555 static struct mdt_handler mdt_readpage_ops[] = {
6556 DEF_MDT_HDL(0,                  MDS_CONNECT,  mdt_connect),
6557 DEF_MDT_HDL(HABEO_CORPUS | HABEO_REFERO, MDS_READPAGE, mdt_readpage),
6558 /* XXX: this is ugly and should be fixed one day, see mdc_close() for
6559  * detailed comments. --umka */
6560 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
6561 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
6562 };
6563
6564 static struct mdt_opc_slice mdt_readpage_handlers[] = {
6565         {
6566                 .mos_opc_start = MDS_GETATTR,
6567                 .mos_opc_end   = MDS_LAST_OPC,
6568                 .mos_hs        = mdt_readpage_ops
6569         },
6570         {
6571                 .mos_opc_start = OBD_FIRST_OPC,
6572                 .mos_opc_end   = OBD_LAST_OPC,
6573                 .mos_hs        = mdt_obd_ops
6574         },
6575         {
6576                 .mos_hs        = NULL
6577         }
6578 };
6579
6580 /* Cross MDT operation handlers for DNE */
6581 static struct mdt_handler mdt_xmds_ops[] = {
6582 DEF_MDT_HDL(0,                          MDS_CONNECT,      mdt_connect),
6583 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETATTR,      mdt_getattr),
6584 DEF_MDT_HDL(0           | MUTABOR,      MDS_REINT,        mdt_reint),
6585 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_IS_SUBDIR,    mdt_is_subdir),
6586 };
6587
6588 static struct mdt_opc_slice mdt_xmds_handlers[] = {
6589         {
6590                 .mos_opc_start = MDS_GETATTR,
6591                 .mos_opc_end   = MDS_LAST_OPC,
6592                 .mos_hs        = mdt_xmds_ops
6593         },
6594         {
6595                 .mos_opc_start = OBD_PING,
6596                 .mos_opc_end   = OBD_LAST_OPC,
6597                 .mos_hs        = mdt_obd_ops
6598         },
6599         {
6600                 .mos_opc_start = SEC_CTX_INIT,
6601                 .mos_opc_end   = SEC_LAST_OPC,
6602                 .mos_hs        = mdt_sec_ctx_ops
6603         },
6604         {
6605                 .mos_hs        = NULL
6606         }
6607 };
6608
6609 /* Sequence service handlers */
6610 #define DEF_SEQ_HDL(flags, name, fn)                                    \
6611         DEFINE_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name)
6612
6613 static struct mdt_handler mdt_seq_ops[] = {
6614 DEF_SEQ_HDL(0,                          SEQ_QUERY,        (void *)seq_query),
6615 };
6616
6617 static struct mdt_opc_slice mdt_seq_handlers[] = {
6618         {
6619                 .mos_opc_start = SEQ_QUERY,
6620                 .mos_opc_end   = SEQ_LAST_OPC,
6621                 .mos_hs        = mdt_seq_ops
6622         },
6623         {
6624                 .mos_hs        = NULL
6625         }
6626 };
6627
6628 /* FID Location Database handlers */
6629 #define DEF_FLD_HDL(flags, name, fn)                                    \
6630         DEFINE_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name)
6631
6632 static struct mdt_handler mdt_fld_ops[] = {
6633 DEF_FLD_HDL(0,                          FLD_QUERY,        (void *)fld_query),
6634 };
6635
6636 static struct mdt_opc_slice mdt_fld_handlers[] = {
6637         {
6638                 .mos_opc_start = FLD_QUERY,
6639                 .mos_opc_end   = FLD_LAST_OPC,
6640                 .mos_hs        = mdt_fld_ops
6641         },
6642         {
6643                 .mos_hs        = NULL
6644         }
6645 };
6646
6647 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6648 MODULE_DESCRIPTION("Lustre Metadata Target ("LUSTRE_MDT_NAME")");
6649 MODULE_LICENSE("GPL");
6650
6651 cfs_module(mdt, LUSTRE_VERSION_STRING, mdt_mod_init, mdt_mod_exit);