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 <lquota.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(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(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(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         ENTRY;
2053
2054         oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
2055         if (oqctl == NULL)
2056                 RETURN(err_serious(-EPROTO));
2057
2058         rc = req_capsule_server_pack(pill);
2059         if (rc)
2060                 RETURN(err_serious(rc));
2061
2062         switch (oqctl->qc_cmd) {
2063         case Q_QUOTACHECK:
2064         case LUSTRE_Q_INVALIDATE:
2065         case LUSTRE_Q_FINVALIDATE:
2066         case Q_QUOTAON:
2067         case Q_QUOTAOFF:
2068         case Q_INITQUOTA:
2069                 /* deprecated, not used any more */
2070                 RETURN(-EOPNOTSUPP);
2071                 /* master quotactl */
2072         case Q_GETINFO:
2073         case Q_SETINFO:
2074         case Q_SETQUOTA:
2075         case Q_GETQUOTA:
2076                 /* slave quotactl */
2077         case Q_GETOINFO:
2078         case Q_GETOQUOTA:
2079                 break;
2080         default:
2081                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
2082                 RETURN(-EFAULT);
2083         }
2084
2085         /* map uid/gid for remote client */
2086         id = oqctl->qc_id;
2087         if (exp_connect_rmtclient(exp)) {
2088                 struct lustre_idmap_table *idmap;
2089
2090                 idmap = mdt_req2med(mdt_info_req(info))->med_idmap;
2091
2092                 if (unlikely(oqctl->qc_cmd != Q_GETQUOTA &&
2093                              oqctl->qc_cmd != Q_GETINFO))
2094                         RETURN(-EPERM);
2095
2096                 if (oqctl->qc_type == USRQUOTA)
2097                         id = lustre_idmap_lookup_uid(NULL, idmap, 0,
2098                                                      oqctl->qc_id);
2099                 else if (oqctl->qc_type == GRPQUOTA)
2100                         id = lustre_idmap_lookup_gid(NULL, idmap, 0,
2101                                                      oqctl->qc_id);
2102                 else
2103                         RETURN(-EINVAL);
2104
2105                 if (id == CFS_IDMAP_NOTFOUND) {
2106                         CDEBUG(D_QUOTA, "no mapping for id %u\n", oqctl->qc_id);
2107                         RETURN(-EACCES);
2108                 }
2109         }
2110
2111         repoqc = req_capsule_server_get(pill, &RMF_OBD_QUOTACTL);
2112         if (repoqc == NULL)
2113                 RETURN(err_serious(-EFAULT));
2114
2115         if (oqctl->qc_id != id)
2116                 swap(oqctl->qc_id, id);
2117
2118         switch (oqctl->qc_cmd) {
2119
2120                 /* master quotactl */
2121         case Q_GETINFO:
2122         case Q_SETINFO:
2123         case Q_SETQUOTA:
2124                 /* XXX: not implemented yet. Will be when qmt support is
2125                  * added */
2126                 CERROR("quotactl operation %d not implemented yet\n",
2127                                         oqctl->qc_cmd);
2128                 RETURN(-EOPNOTSUPP);
2129         case Q_GETQUOTA:
2130                 /* XXX: return no limit for now, just for testing purpose */
2131                 memset(&oqctl->qc_dqblk, 0, sizeof(struct obd_dqblk));
2132                 oqctl->qc_dqblk.dqb_valid = QIF_LIMITS;
2133                 rc = 0;
2134                 break;
2135
2136                 /* slave quotactl */
2137         case Q_GETOINFO:
2138         case Q_GETOQUOTA:
2139                 rc = lquotactl_slv(info->mti_env, info->mti_mdt->mdt_bottom,
2140                                    oqctl);
2141                 break;
2142
2143         default:
2144                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
2145                 RETURN(-EFAULT);
2146         }
2147
2148         if (oqctl->qc_id != id)
2149                 swap(oqctl->qc_id, id);
2150
2151         *repoqc = *oqctl;
2152         RETURN(rc);
2153 }
2154
2155 /*
2156  * OBD PING and other handlers.
2157  */
2158 static int mdt_obd_ping(struct mdt_thread_info *info)
2159 {
2160         int rc;
2161         ENTRY;
2162
2163         req_capsule_set(info->mti_pill, &RQF_OBD_PING);
2164
2165         rc = target_handle_ping(mdt_info_req(info));
2166         if (rc < 0)
2167                 rc = err_serious(rc);
2168         RETURN(rc);
2169 }
2170
2171 /*
2172  * OBD_IDX_READ handler
2173  */
2174 static int mdt_obd_idx_read(struct mdt_thread_info *info)
2175 {
2176         struct mdt_device       *mdt = info->mti_mdt;
2177         struct lu_rdpg          *rdpg = &info->mti_u.rdpg.mti_rdpg;
2178         struct idx_info         *req_ii, *rep_ii;
2179         int                      rc, i;
2180         ENTRY;
2181
2182         memset(rdpg, 0, sizeof(*rdpg));
2183         req_capsule_set(info->mti_pill, &RQF_OBD_IDX_READ);
2184
2185         /* extract idx_info buffer from request & reply */
2186         req_ii = req_capsule_client_get(info->mti_pill, &RMF_IDX_INFO);
2187         if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
2188                 RETURN(err_serious(-EPROTO));
2189
2190         rc = req_capsule_server_pack(info->mti_pill);
2191         if (rc)
2192                 RETURN(err_serious(rc));
2193
2194         rep_ii = req_capsule_server_get(info->mti_pill, &RMF_IDX_INFO);
2195         if (rep_ii == NULL)
2196                 RETURN(err_serious(-EFAULT));
2197         rep_ii->ii_magic = IDX_INFO_MAGIC;
2198
2199         /* extract hash to start with */
2200         rdpg->rp_hash = req_ii->ii_hash_start;
2201
2202         /* extract requested attributes */
2203         rdpg->rp_attrs = req_ii->ii_attrs;
2204
2205         /* check that fid packed in request is valid and supported */
2206         if (!fid_is_sane(&req_ii->ii_fid))
2207                 RETURN(-EINVAL);
2208         rep_ii->ii_fid = req_ii->ii_fid;
2209
2210         /* copy flags */
2211         rep_ii->ii_flags = req_ii->ii_flags;
2212
2213         /* compute number of pages to allocate, ii_count is the number of 4KB
2214          * containers */
2215         if (req_ii->ii_count <= 0)
2216                 GOTO(out, rc = -EFAULT);
2217         rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
2218                                PTLRPC_MAX_BRW_SIZE);
2219         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE -1) >> CFS_PAGE_SHIFT;
2220
2221         /* allocate pages to store the containers */
2222         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2223         if (rdpg->rp_pages == NULL)
2224                 GOTO(out, rc = -ENOMEM);
2225         for (i = 0; i < rdpg->rp_npages; i++) {
2226                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
2227                 if (rdpg->rp_pages[i] == NULL)
2228                         GOTO(out, rc = -ENOMEM);
2229         }
2230
2231         /* populate pages with key/record pairs */
2232         rc = dt_index_read(info->mti_env, mdt->mdt_bottom, rep_ii, rdpg);
2233         if (rc < 0)
2234                 GOTO(out, rc);
2235
2236         LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
2237                  "asked %d > %d\n", rc, rdpg->rp_count);
2238
2239         /* send pages to client */
2240         rc = mdt_sendpage(info, rdpg, rc);
2241
2242         GOTO(out, rc);
2243 out:
2244         if (rdpg->rp_pages) {
2245                 for (i = 0; i < rdpg->rp_npages; i++)
2246                         if (rdpg->rp_pages[i])
2247                                 cfs_free_page(rdpg->rp_pages[i]);
2248                 OBD_FREE(rdpg->rp_pages,
2249                          rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2250         }
2251         return rc;
2252 }
2253
2254 static int mdt_obd_log_cancel(struct mdt_thread_info *info)
2255 {
2256         return err_serious(-EOPNOTSUPP);
2257 }
2258
2259 static int mdt_obd_qc_callback(struct mdt_thread_info *info)
2260 {
2261         return err_serious(-EOPNOTSUPP);
2262 }
2263
2264
2265 /*
2266  * LLOG handlers.
2267  */
2268
2269 /** clone llog ctxt from child (mdd)
2270  * This allows remote llog (replicator) access.
2271  * We can either pass all llog RPCs (eg mdt_llog_create) on to child where the
2272  * context was originally set up, or we can handle them directly.
2273  * I choose the latter, but that means I need any llog
2274  * contexts set up by child to be accessable by the mdt.  So we clone the
2275  * context into our context list here.
2276  */
2277 static int mdt_llog_ctxt_clone(const struct lu_env *env, struct mdt_device *mdt,
2278                                int idx)
2279 {
2280         struct md_device  *next = mdt->mdt_child;
2281         struct llog_ctxt *ctxt;
2282         int rc;
2283
2284         if (!llog_ctxt_null(mdt2obd_dev(mdt), idx))
2285                 return 0;
2286
2287         rc = next->md_ops->mdo_llog_ctxt_get(env, next, idx, (void **)&ctxt);
2288         if (rc || ctxt == NULL) {
2289                 return 0;
2290         }
2291
2292         rc = llog_group_set_ctxt(&mdt2obd_dev(mdt)->obd_olg, ctxt, idx);
2293         if (rc)
2294                 CERROR("Can't set mdt ctxt %d\n", rc);
2295
2296         return rc;
2297 }
2298
2299 static int mdt_llog_ctxt_unclone(const struct lu_env *env,
2300                                  struct mdt_device *mdt, int idx)
2301 {
2302         struct llog_ctxt *ctxt;
2303
2304         ctxt = llog_get_context(mdt2obd_dev(mdt), idx);
2305         if (ctxt == NULL)
2306                 return 0;
2307         /* Put once for the get we just did, and once for the clone */
2308         llog_ctxt_put(ctxt);
2309         llog_ctxt_put(ctxt);
2310         return 0;
2311 }
2312
2313 static int mdt_llog_create(struct mdt_thread_info *info)
2314 {
2315         int rc;
2316
2317         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
2318         rc = llog_origin_handle_open(mdt_info_req(info));
2319         return (rc < 0 ? err_serious(rc) : rc);
2320 }
2321
2322 static int mdt_llog_destroy(struct mdt_thread_info *info)
2323 {
2324         int rc;
2325
2326         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_DESTROY);
2327         rc = llog_origin_handle_destroy(mdt_info_req(info));
2328         return (rc < 0 ? err_serious(rc) : rc);
2329 }
2330
2331 static int mdt_llog_read_header(struct mdt_thread_info *info)
2332 {
2333         int rc;
2334
2335         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2336         rc = llog_origin_handle_read_header(mdt_info_req(info));
2337         return (rc < 0 ? err_serious(rc) : rc);
2338 }
2339
2340 static int mdt_llog_next_block(struct mdt_thread_info *info)
2341 {
2342         int rc;
2343
2344         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
2345         rc = llog_origin_handle_next_block(mdt_info_req(info));
2346         return (rc < 0 ? err_serious(rc) : rc);
2347 }
2348
2349 static int mdt_llog_prev_block(struct mdt_thread_info *info)
2350 {
2351         int rc;
2352
2353         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
2354         rc = llog_origin_handle_prev_block(mdt_info_req(info));
2355         return (rc < 0 ? err_serious(rc) : rc);
2356 }
2357
2358
2359 /*
2360  * DLM handlers.
2361  */
2362 static struct ldlm_callback_suite cbs = {
2363         .lcs_completion = ldlm_server_completion_ast,
2364         .lcs_blocking   = ldlm_server_blocking_ast,
2365         .lcs_glimpse    = ldlm_server_glimpse_ast
2366 };
2367
2368 static int mdt_enqueue(struct mdt_thread_info *info)
2369 {
2370         struct ptlrpc_request *req;
2371         int rc;
2372
2373         /*
2374          * info->mti_dlm_req already contains swapped and (if necessary)
2375          * converted dlm request.
2376          */
2377         LASSERT(info->mti_dlm_req != NULL);
2378
2379         req = mdt_info_req(info);
2380         rc = ldlm_handle_enqueue0(info->mti_mdt->mdt_namespace,
2381                                   req, info->mti_dlm_req, &cbs);
2382         info->mti_fail_id = OBD_FAIL_LDLM_REPLY;
2383         return rc ? err_serious(rc) : req->rq_status;
2384 }
2385
2386 static int mdt_convert(struct mdt_thread_info *info)
2387 {
2388         int rc;
2389         struct ptlrpc_request *req;
2390
2391         LASSERT(info->mti_dlm_req);
2392         req = mdt_info_req(info);
2393         rc = ldlm_handle_convert0(req, info->mti_dlm_req);
2394         return rc ? err_serious(rc) : req->rq_status;
2395 }
2396
2397 static int mdt_bl_callback(struct mdt_thread_info *info)
2398 {
2399         CERROR("bl callbacks should not happen on MDS\n");
2400         LBUG();
2401         return err_serious(-EOPNOTSUPP);
2402 }
2403
2404 static int mdt_cp_callback(struct mdt_thread_info *info)
2405 {
2406         CERROR("cp callbacks should not happen on MDS\n");
2407         LBUG();
2408         return err_serious(-EOPNOTSUPP);
2409 }
2410
2411 /*
2412  * sec context handlers
2413  */
2414 static int mdt_sec_ctx_handle(struct mdt_thread_info *info)
2415 {
2416         int rc;
2417
2418         rc = mdt_handle_idmap(info);
2419
2420         if (unlikely(rc)) {
2421                 struct ptlrpc_request *req = mdt_info_req(info);
2422                 __u32                  opc;
2423
2424                 opc = lustre_msg_get_opc(req->rq_reqmsg);
2425                 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT)
2426                         sptlrpc_svc_ctx_invalidate(req);
2427         }
2428
2429         CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
2430
2431         return rc;
2432 }
2433
2434 static struct mdt_object *mdt_obj(struct lu_object *o)
2435 {
2436         LASSERT(lu_device_is_mdt(o->lo_dev));
2437         return container_of0(o, struct mdt_object, mot_obj.mo_lu);
2438 }
2439
2440 struct mdt_object *mdt_object_new(const struct lu_env *env,
2441                                   struct mdt_device *d,
2442                                   const struct lu_fid *f)
2443 {
2444         struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2445         struct lu_object *o;
2446         struct mdt_object *m;
2447         ENTRY;
2448
2449         CDEBUG(D_INFO, "Allocate object for "DFID"\n", PFID(f));
2450         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, &conf);
2451         if (unlikely(IS_ERR(o)))
2452                 m = (struct mdt_object *)o;
2453         else
2454                 m = mdt_obj(o);
2455         RETURN(m);
2456 }
2457
2458 struct mdt_object *mdt_object_find(const struct lu_env *env,
2459                                    struct mdt_device *d,
2460                                    const struct lu_fid *f)
2461 {
2462         struct lu_object *o;
2463         struct mdt_object *m;
2464         ENTRY;
2465
2466         CDEBUG(D_INFO, "Find object for "DFID"\n", PFID(f));
2467         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, NULL);
2468         if (unlikely(IS_ERR(o)))
2469                 m = (struct mdt_object *)o;
2470         else
2471                 m = mdt_obj(o);
2472         RETURN(m);
2473 }
2474
2475 /**
2476  * Asyncronous commit for mdt device.
2477  *
2478  * Pass asynchonous commit call down the MDS stack.
2479  *
2480  * \param env environment
2481  * \param mdt the mdt device
2482  */
2483 static void mdt_device_commit_async(const struct lu_env *env,
2484                                     struct mdt_device *mdt)
2485 {
2486         struct dt_device *dt = mdt->mdt_bottom;
2487         int rc;
2488
2489         rc = dt->dd_ops->dt_commit_async(env, dt);
2490         if (unlikely(rc != 0))
2491                 CWARN("async commit start failed with rc = %d", rc);
2492 }
2493
2494 /**
2495  * Mark the lock as "synchonous".
2496  *
2497  * Mark the lock to deffer transaction commit to the unlock time.
2498  *
2499  * \param lock the lock to mark as "synchonous"
2500  *
2501  * \see mdt_is_lock_sync
2502  * \see mdt_save_lock
2503  */
2504 static inline void mdt_set_lock_sync(struct ldlm_lock *lock)
2505 {
2506         lock->l_ast_data = (void*)1;
2507 }
2508
2509 /**
2510  * Check whehter the lock "synchonous" or not.
2511  *
2512  * \param lock the lock to check
2513  * \retval 1 the lock is "synchonous"
2514  * \retval 0 the lock isn't "synchronous"
2515  *
2516  * \see mdt_set_lock_sync
2517  * \see mdt_save_lock
2518  */
2519 static inline int mdt_is_lock_sync(struct ldlm_lock *lock)
2520 {
2521         return lock->l_ast_data != NULL;
2522 }
2523
2524 /**
2525  * Blocking AST for mdt locks.
2526  *
2527  * Starts transaction commit if in case of COS lock conflict or
2528  * deffers such a commit to the mdt_save_lock.
2529  *
2530  * \param lock the lock which blocks a request or cancelling lock
2531  * \param desc unused
2532  * \param data unused
2533  * \param flag indicates whether this cancelling or blocking callback
2534  * \retval 0
2535  * \see ldlm_blocking_ast_nocheck
2536  */
2537 int mdt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2538                      void *data, int flag)
2539 {
2540         struct obd_device *obd = ldlm_lock_to_ns(lock)->ns_obd;
2541         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
2542         int rc;
2543         ENTRY;
2544
2545         if (flag == LDLM_CB_CANCELING)
2546                 RETURN(0);
2547         lock_res_and_lock(lock);
2548         if (lock->l_blocking_ast != mdt_blocking_ast) {
2549                 unlock_res_and_lock(lock);
2550                 RETURN(0);
2551         }
2552         if (mdt_cos_is_enabled(mdt) &&
2553             lock->l_req_mode & (LCK_PW | LCK_EX) &&
2554             lock->l_blocking_lock != NULL &&
2555             lock->l_client_cookie != lock->l_blocking_lock->l_client_cookie) {
2556                 mdt_set_lock_sync(lock);
2557         }
2558         rc = ldlm_blocking_ast_nocheck(lock);
2559
2560         /* There is no lock conflict if l_blocking_lock == NULL,
2561          * it indicates a blocking ast sent from ldlm_lock_decref_internal
2562          * when the last reference to a local lock was released */
2563         if (lock->l_req_mode == LCK_COS && lock->l_blocking_lock != NULL) {
2564                 struct lu_env env;
2565
2566                 rc = lu_env_init(&env, LCT_LOCAL);
2567                 if (unlikely(rc != 0))
2568                         CWARN("lu_env initialization failed with rc = %d,"
2569                               "cannot start asynchronous commit\n", rc);
2570                 else
2571                         mdt_device_commit_async(&env, mdt);
2572                 lu_env_fini(&env);
2573         }
2574         RETURN(rc);
2575 }
2576
2577 int mdt_object_lock(struct mdt_thread_info *info, struct mdt_object *o,
2578                     struct mdt_lock_handle *lh, __u64 ibits, int locality)
2579 {
2580         struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
2581         ldlm_policy_data_t *policy = &info->mti_policy;
2582         struct ldlm_res_id *res_id = &info->mti_res_id;
2583         int rc;
2584         ENTRY;
2585
2586         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2587         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2588         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
2589         LASSERT(lh->mlh_type != MDT_NUL_LOCK);
2590
2591         if (mdt_object_exists(o) < 0) {
2592                 if (locality == MDT_CROSS_LOCK) {
2593                         /* cross-ref object fix */
2594                         ibits &= ~MDS_INODELOCK_UPDATE;
2595                         ibits |= MDS_INODELOCK_LOOKUP;
2596                 } else {
2597                         LASSERT(!(ibits & MDS_INODELOCK_UPDATE));
2598                         LASSERT(ibits & MDS_INODELOCK_LOOKUP);
2599                 }
2600                 /* No PDO lock on remote object */
2601                 LASSERT(lh->mlh_type != MDT_PDO_LOCK);
2602         }
2603
2604         if (lh->mlh_type == MDT_PDO_LOCK) {
2605                 /* check for exists after object is locked */
2606                 if (mdt_object_exists(o) == 0) {
2607                         /* Non-existent object shouldn't have PDO lock */
2608                         RETURN(-ESTALE);
2609                 } else {
2610                         /* Non-dir object shouldn't have PDO lock */
2611                         if (!S_ISDIR(lu_object_attr(&o->mot_obj.mo_lu)))
2612                                 RETURN(-ENOTDIR);
2613                 }
2614         }
2615
2616         memset(policy, 0, sizeof(*policy));
2617         fid_build_reg_res_name(mdt_object_fid(o), res_id);
2618
2619         /*
2620          * Take PDO lock on whole directory and build correct @res_id for lock
2621          * on part of directory.
2622          */
2623         if (lh->mlh_pdo_hash != 0) {
2624                 LASSERT(lh->mlh_type == MDT_PDO_LOCK);
2625                 mdt_lock_pdo_mode(info, o, lh);
2626                 if (lh->mlh_pdo_mode != LCK_NL) {
2627                         /*
2628                          * Do not use LDLM_FL_LOCAL_ONLY for parallel lock, it
2629                          * is never going to be sent to client and we do not
2630                          * want it slowed down due to possible cancels.
2631                          */
2632                         policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
2633                         rc = mdt_fid_lock(ns, &lh->mlh_pdo_lh, lh->mlh_pdo_mode,
2634                                           policy, res_id, LDLM_FL_ATOMIC_CB,
2635                                           &info->mti_exp->exp_handle.h_cookie);
2636                         if (unlikely(rc))
2637                                 RETURN(rc);
2638                 }
2639
2640                 /*
2641                  * Finish res_id initializing by name hash marking part of
2642                  * directory which is taking modification.
2643                  */
2644                 res_id->name[LUSTRE_RES_ID_HSH_OFF] = lh->mlh_pdo_hash;
2645         }
2646
2647         policy->l_inodebits.bits = ibits;
2648
2649         /*
2650          * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
2651          * going to be sent to client. If it is - mdt_intent_policy() path will
2652          * fix it up and turn FL_LOCAL flag off.
2653          */
2654         rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy,
2655                           res_id, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB,
2656                           &info->mti_exp->exp_handle.h_cookie);
2657         if (rc)
2658                 mdt_object_unlock(info, o, lh, 1);
2659         else if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_MDS_PDO_LOCK)) &&
2660                  lh->mlh_pdo_hash != 0 &&
2661                  (lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX)) {
2662                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK, 15);
2663         }
2664
2665         RETURN(rc);
2666 }
2667
2668 /**
2669  * Save a lock within request object.
2670  *
2671  * Keep the lock referenced until whether client ACK or transaction
2672  * commit happens or release the lock immediately depending on input
2673  * parameters. If COS is ON, a write lock is converted to COS lock
2674  * before saving.
2675  *
2676  * \param info thead info object
2677  * \param h lock handle
2678  * \param mode lock mode
2679  * \param decref force immediate lock releasing
2680  */
2681 static
2682 void mdt_save_lock(struct mdt_thread_info *info, struct lustre_handle *h,
2683                    ldlm_mode_t mode, int decref)
2684 {
2685         ENTRY;
2686
2687         if (lustre_handle_is_used(h)) {
2688                 if (decref || !info->mti_has_trans ||
2689                     !(mode & (LCK_PW | LCK_EX))){
2690                         mdt_fid_unlock(h, mode);
2691                 } else {
2692                         struct mdt_device *mdt = info->mti_mdt;
2693                         struct ldlm_lock *lock = ldlm_handle2lock(h);
2694                         struct ptlrpc_request *req = mdt_info_req(info);
2695                         int no_ack = 0;
2696
2697                         LASSERTF(lock != NULL, "no lock for cookie "LPX64"\n",
2698                                  h->cookie);
2699                         CDEBUG(D_HA, "request = %p reply state = %p"
2700                                " transno = "LPD64"\n",
2701                                req, req->rq_reply_state, req->rq_transno);
2702                         if (mdt_cos_is_enabled(mdt)) {
2703                                 no_ack = 1;
2704                                 ldlm_lock_downgrade(lock, LCK_COS);
2705                                 mode = LCK_COS;
2706                         }
2707                         ptlrpc_save_lock(req, h, mode, no_ack);
2708                         if (mdt_is_lock_sync(lock)) {
2709                                 CDEBUG(D_HA, "found sync-lock,"
2710                                        " async commit started\n");
2711                                 mdt_device_commit_async(info->mti_env,
2712                                                         mdt);
2713                         }
2714                         LDLM_LOCK_PUT(lock);
2715                 }
2716                 h->cookie = 0ull;
2717         }
2718
2719         EXIT;
2720 }
2721
2722 /**
2723  * Unlock mdt object.
2724  *
2725  * Immeditely release the regular lock and the PDO lock or save the
2726  * lock in reqeuest and keep them referenced until client ACK or
2727  * transaction commit.
2728  *
2729  * \param info thread info object
2730  * \param o mdt object
2731  * \param lh mdt lock handle referencing regular and PDO locks
2732  * \param decref force immediate lock releasing
2733  */
2734 void mdt_object_unlock(struct mdt_thread_info *info, struct mdt_object *o,
2735                        struct mdt_lock_handle *lh, int decref)
2736 {
2737         ENTRY;
2738
2739         mdt_save_lock(info, &lh->mlh_pdo_lh, lh->mlh_pdo_mode, decref);
2740         mdt_save_lock(info, &lh->mlh_reg_lh, lh->mlh_reg_mode, decref);
2741
2742         EXIT;
2743 }
2744
2745 struct mdt_object *mdt_object_find_lock(struct mdt_thread_info *info,
2746                                         const struct lu_fid *f,
2747                                         struct mdt_lock_handle *lh,
2748                                         __u64 ibits)
2749 {
2750         struct mdt_object *o;
2751
2752         o = mdt_object_find(info->mti_env, info->mti_mdt, f);
2753         if (!IS_ERR(o)) {
2754                 int rc;
2755
2756                 rc = mdt_object_lock(info, o, lh, ibits,
2757                                      MDT_LOCAL_LOCK);
2758                 if (rc != 0) {
2759                         mdt_object_put(info->mti_env, o);
2760                         o = ERR_PTR(rc);
2761                 }
2762         }
2763         return o;
2764 }
2765
2766 void mdt_object_unlock_put(struct mdt_thread_info * info,
2767                            struct mdt_object * o,
2768                            struct mdt_lock_handle *lh,
2769                            int decref)
2770 {
2771         mdt_object_unlock(info, o, lh, decref);
2772         mdt_object_put(info->mti_env, o);
2773 }
2774
2775 static struct mdt_handler *mdt_handler_find(__u32 opc,
2776                                             struct mdt_opc_slice *supported)
2777 {
2778         struct mdt_opc_slice *s;
2779         struct mdt_handler   *h;
2780
2781         h = NULL;
2782         for (s = supported; s->mos_hs != NULL; s++) {
2783                 if (s->mos_opc_start <= opc && opc < s->mos_opc_end) {
2784                         h = s->mos_hs + (opc - s->mos_opc_start);
2785                         if (likely(h->mh_opc != 0))
2786                                 LASSERTF(h->mh_opc == opc,
2787                                          "opcode mismatch %d != %d\n",
2788                                          h->mh_opc, opc);
2789                         else
2790                                 h = NULL; /* unsupported opc */
2791                         break;
2792                 }
2793         }
2794         return h;
2795 }
2796
2797 static int mdt_lock_resname_compat(struct mdt_device *m,
2798                                    struct ldlm_request *req)
2799 {
2800         /* XXX something... later. */
2801         return 0;
2802 }
2803
2804 static int mdt_lock_reply_compat(struct mdt_device *m, struct ldlm_reply *rep)
2805 {
2806         /* XXX something... later. */
2807         return 0;
2808 }
2809
2810 /*
2811  * Generic code handling requests that have struct mdt_body passed in:
2812  *
2813  *  - extract mdt_body from request and save it in @info, if present;
2814  *
2815  *  - create lu_object, corresponding to the fid in mdt_body, and save it in
2816  *  @info;
2817  *
2818  *  - if HABEO_CORPUS flag is set for this request type check whether object
2819  *  actually exists on storage (lu_object_exists()).
2820  *
2821  */
2822 static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
2823 {
2824         const struct mdt_body    *body;
2825         struct mdt_object        *obj;
2826         const struct lu_env      *env;
2827         struct req_capsule       *pill;
2828         int                       rc;
2829         ENTRY;
2830
2831         env = info->mti_env;
2832         pill = info->mti_pill;
2833
2834         body = info->mti_body = req_capsule_client_get(pill, &RMF_MDT_BODY);
2835         if (body == NULL)
2836                 RETURN(-EFAULT);
2837
2838         if (!(body->valid & OBD_MD_FLID))
2839                 RETURN(0);
2840
2841         if (!fid_is_sane(&body->fid1)) {
2842                 CERROR("Invalid fid: "DFID"\n", PFID(&body->fid1));
2843                 RETURN(-EINVAL);
2844         }
2845
2846         /*
2847          * Do not get size or any capa fields before we check that request
2848          * contains capa actually. There are some requests which do not, for
2849          * instance MDS_IS_SUBDIR.
2850          */
2851         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
2852             req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
2853                 mdt_set_capainfo(info, 0, &body->fid1,
2854                                  req_capsule_client_get(pill, &RMF_CAPA1));
2855
2856         obj = mdt_object_find(env, info->mti_mdt, &body->fid1);
2857         if (!IS_ERR(obj)) {
2858                 if ((flags & HABEO_CORPUS) &&
2859                     !mdt_object_exists(obj)) {
2860                         mdt_object_put(env, obj);
2861                         /* for capability renew ENOENT will be handled in
2862                          * mdt_renew_capa */
2863                         if (body->valid & OBD_MD_FLOSSCAPA)
2864                                 rc = 0;
2865                         else
2866                                 rc = -ENOENT;
2867                 } else {
2868                         info->mti_object = obj;
2869                         rc = 0;
2870                 }
2871         } else
2872                 rc = PTR_ERR(obj);
2873
2874         RETURN(rc);
2875 }
2876
2877 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags)
2878 {
2879         struct req_capsule *pill = info->mti_pill;
2880         int rc;
2881         ENTRY;
2882
2883         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT))
2884                 rc = mdt_body_unpack(info, flags);
2885         else
2886                 rc = 0;
2887
2888         if (rc == 0 && (flags & HABEO_REFERO)) {
2889                 /* Pack reply. */
2890                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
2891                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
2892                                              info->mti_body->eadatasize);
2893                 if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
2894                         req_capsule_set_size(pill, &RMF_LOGCOOKIES,
2895                                              RCL_SERVER, 0);
2896
2897                 rc = req_capsule_server_pack(pill);
2898         }
2899         RETURN(rc);
2900 }
2901
2902 static int mdt_init_capa_ctxt(const struct lu_env *env, struct mdt_device *m)
2903 {
2904         struct md_device *next = m->mdt_child;
2905
2906         return next->md_ops->mdo_init_capa_ctxt(env, next,
2907                                                 m->mdt_opts.mo_mds_capa,
2908                                                 m->mdt_capa_timeout,
2909                                                 m->mdt_capa_alg,
2910                                                 m->mdt_capa_keys);
2911 }
2912
2913 /*
2914  * Invoke handler for this request opc. Also do necessary preprocessing
2915  * (according to handler ->mh_flags), and post-processing (setting of
2916  * ->last_{xid,committed}).
2917  */
2918 static int mdt_req_handle(struct mdt_thread_info *info,
2919                           struct mdt_handler *h, struct ptlrpc_request *req)
2920 {
2921         int   rc, serious = 0;
2922         __u32 flags;
2923
2924         ENTRY;
2925
2926         LASSERT(h->mh_act != NULL);
2927         LASSERT(h->mh_opc == lustre_msg_get_opc(req->rq_reqmsg));
2928         LASSERT(current->journal_info == NULL);
2929
2930         /*
2931          * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
2932          * to put same checks into handlers like mdt_close(), mdt_reint(),
2933          * etc., without talking to mdt authors first. Checking same thing
2934          * there again is useless and returning 0 error without packing reply
2935          * is buggy! Handlers either pack reply or return error.
2936          *
2937          * We return 0 here and do not send any reply in order to emulate
2938          * network failure. Do not send any reply in case any of NET related
2939          * fail_id has occured.
2940          */
2941         if (OBD_FAIL_CHECK_ORSET(h->mh_fail_id, OBD_FAIL_ONCE))
2942                 RETURN(0);
2943
2944         rc = 0;
2945         flags = h->mh_flags;
2946         LASSERT(ergo(flags & (HABEO_CORPUS|HABEO_REFERO), h->mh_fmt != NULL));
2947
2948         if (h->mh_fmt != NULL) {
2949                 req_capsule_set(info->mti_pill, h->mh_fmt);
2950                 rc = mdt_unpack_req_pack_rep(info, flags);
2951         }
2952
2953         if (rc == 0 && flags & MUTABOR &&
2954             req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
2955                 /* should it be rq_status? */
2956                 rc = -EROFS;
2957
2958         if (rc == 0 && flags & HABEO_CLAVIS) {
2959                 struct ldlm_request *dlm_req;
2960
2961                 LASSERT(h->mh_fmt != NULL);
2962
2963                 dlm_req = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
2964                 if (dlm_req != NULL) {
2965                         if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
2966                                         LDLM_IBITS &&
2967                                      dlm_req->lock_desc.l_policy_data.\
2968                                         l_inodebits.bits == 0)) {
2969                                 /*
2970                                  * Lock without inodebits makes no sense and
2971                                  * will oops later in ldlm. If client miss to
2972                                  * set such bits, do not trigger ASSERTION.
2973                                  *
2974                                  * For liblustre flock case, it maybe zero.
2975                                  */
2976                                 rc = -EPROTO;
2977                         } else {
2978                                 if (info->mti_mdt->mdt_opts.mo_compat_resname)
2979                                         rc = mdt_lock_resname_compat(
2980                                                                 info->mti_mdt,
2981                                                                 dlm_req);
2982                                 info->mti_dlm_req = dlm_req;
2983                         }
2984                 } else {
2985                         rc = -EFAULT;
2986                 }
2987         }
2988
2989         /* capability setting changed via /proc, needs reinitialize ctxt */
2990         if (info->mti_mdt && info->mti_mdt->mdt_capa_conf) {
2991                 mdt_init_capa_ctxt(info->mti_env, info->mti_mdt);
2992                 info->mti_mdt->mdt_capa_conf = 0;
2993         }
2994
2995         if (likely(rc == 0)) {
2996                 /*
2997                  * Process request, there can be two types of rc:
2998                  * 1) errors with msg unpack/pack, other failures outside the
2999                  * operation itself. This is counted as serious errors;
3000                  * 2) errors during fs operation, should be placed in rq_status
3001                  * only
3002                  */
3003                 rc = h->mh_act(info);
3004                 if (rc == 0 &&
3005                     !req->rq_no_reply && req->rq_reply_state == NULL) {
3006                         DEBUG_REQ(D_ERROR, req, "MDT \"handler\" %s did not "
3007                                   "pack reply and returned 0 error\n",
3008                                   h->mh_name);
3009                         LBUG();
3010                 }
3011                 serious = is_serious(rc);
3012                 rc = clear_serious(rc);
3013         } else
3014                 serious = 1;
3015
3016         req->rq_status = rc;
3017
3018         /*
3019          * ELDLM_* codes which > 0 should be in rq_status only as well as
3020          * all non-serious errors.
3021          */
3022         if (rc > 0 || !serious)
3023                 rc = 0;
3024
3025         LASSERT(current->journal_info == NULL);
3026
3027         if (rc == 0 && (flags & HABEO_CLAVIS) &&
3028             info->mti_mdt->mdt_opts.mo_compat_resname) {
3029                 struct ldlm_reply *dlmrep;
3030
3031                 dlmrep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3032                 if (dlmrep != NULL)
3033                         rc = mdt_lock_reply_compat(info->mti_mdt, dlmrep);
3034         }
3035
3036         /* If we're DISCONNECTing, the mdt_export_data is already freed */
3037         if (likely(rc == 0 && req->rq_export && h->mh_opc != MDS_DISCONNECT))
3038                 target_committed_to_req(req);
3039
3040         if (unlikely(req_is_replay(req) &&
3041                      lustre_msg_get_transno(req->rq_reqmsg) == 0)) {
3042                 DEBUG_REQ(D_ERROR, req, "transno is 0 during REPLAY");
3043                 LBUG();
3044         }
3045
3046         target_send_reply(req, rc, info->mti_fail_id);
3047         RETURN(0);
3048 }
3049
3050 void mdt_lock_handle_init(struct mdt_lock_handle *lh)
3051 {
3052         lh->mlh_type = MDT_NUL_LOCK;
3053         lh->mlh_reg_lh.cookie = 0ull;
3054         lh->mlh_reg_mode = LCK_MINMODE;
3055         lh->mlh_pdo_lh.cookie = 0ull;
3056         lh->mlh_pdo_mode = LCK_MINMODE;
3057 }
3058
3059 void mdt_lock_handle_fini(struct mdt_lock_handle *lh)
3060 {
3061         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
3062         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
3063 }
3064
3065 /*
3066  * Initialize fields of struct mdt_thread_info. Other fields are left in
3067  * uninitialized state, because it's too expensive to zero out whole
3068  * mdt_thread_info (> 1K) on each request arrival.
3069  */
3070 static void mdt_thread_info_init(struct ptlrpc_request *req,
3071                                  struct mdt_thread_info *info)
3072 {
3073         int i;
3074         struct md_capainfo *ci;
3075
3076         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
3077         info->mti_pill = &req->rq_pill;
3078
3079         /* lock handle */
3080         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
3081                 mdt_lock_handle_init(&info->mti_lh[i]);
3082
3083         /* mdt device: it can be NULL while CONNECT */
3084         if (req->rq_export) {
3085                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
3086                 info->mti_exp = req->rq_export;
3087         } else
3088                 info->mti_mdt = NULL;
3089         info->mti_env = req->rq_svc_thread->t_env;
3090         ci = md_capainfo(info->mti_env);
3091         memset(ci, 0, sizeof *ci);
3092         if (req->rq_export) {
3093                 if (exp_connect_rmtclient(req->rq_export))
3094                         ci->mc_auth = LC_ID_CONVERT;
3095                 else if (req->rq_export->exp_connect_flags &
3096                          OBD_CONNECT_MDS_CAPA)
3097                         ci->mc_auth = LC_ID_PLAIN;
3098                 else
3099                         ci->mc_auth = LC_ID_NONE;
3100         }
3101
3102         info->mti_fail_id = OBD_FAIL_MDS_ALL_REPLY_NET;
3103         info->mti_transno = lustre_msg_get_transno(req->rq_reqmsg);
3104         info->mti_mos = NULL;
3105
3106         memset(&info->mti_attr, 0, sizeof(info->mti_attr));
3107         info->mti_body = NULL;
3108         info->mti_object = NULL;
3109         info->mti_dlm_req = NULL;
3110         info->mti_has_trans = 0;
3111         info->mti_no_need_trans = 0;
3112         info->mti_cross_ref = 0;
3113         info->mti_opdata = 0;
3114         info->mti_big_lmm_used = 0;
3115
3116         /* To not check for split by default. */
3117         info->mti_spec.sp_ck_split = 0;
3118         info->mti_spec.no_create = 0;
3119 }
3120
3121 static void mdt_thread_info_fini(struct mdt_thread_info *info)
3122 {
3123         int i;
3124
3125         req_capsule_fini(info->mti_pill);
3126         if (info->mti_object != NULL) {
3127                 /*
3128                  * freeing an object may lead to OSD level transaction, do not
3129                  * let it mess with MDT. bz19385.
3130                  */
3131                 info->mti_no_need_trans = 1;
3132                 mdt_object_put(info->mti_env, info->mti_object);
3133                 info->mti_object = NULL;
3134         }
3135         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
3136                 mdt_lock_handle_fini(&info->mti_lh[i]);
3137         info->mti_env = NULL;
3138 }
3139
3140 static int mdt_filter_recovery_request(struct ptlrpc_request *req,
3141                                        struct obd_device *obd, int *process)
3142 {
3143         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3144         case MDS_CONNECT: /* This will never get here, but for completeness. */
3145         case OST_CONNECT: /* This will never get here, but for completeness. */
3146         case MDS_DISCONNECT:
3147         case OST_DISCONNECT:
3148                *process = 1;
3149                RETURN(0);
3150
3151         case MDS_CLOSE:
3152         case MDS_DONE_WRITING:
3153         case MDS_SYNC: /* used in unmounting */
3154         case OBD_PING:
3155         case MDS_REINT:
3156         case SEQ_QUERY:
3157         case FLD_QUERY:
3158         case LDLM_ENQUEUE:
3159                 *process = target_queue_recovery_request(req, obd);
3160                 RETURN(0);
3161
3162         default:
3163                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
3164                 *process = -EAGAIN;
3165                 RETURN(0);
3166         }
3167 }
3168
3169 /*
3170  * Handle recovery. Return:
3171  *        +1: continue request processing;
3172  *       -ve: abort immediately with the given error code;
3173  *         0: send reply with error code in req->rq_status;
3174  */
3175 static int mdt_recovery(struct mdt_thread_info *info)
3176 {
3177         struct ptlrpc_request *req = mdt_info_req(info);
3178         struct obd_device *obd;
3179
3180         ENTRY;
3181
3182         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3183         case MDS_CONNECT:
3184         case SEC_CTX_INIT:
3185         case SEC_CTX_INIT_CONT:
3186         case SEC_CTX_FINI:
3187                 {
3188 #if 0
3189                         int rc;
3190
3191                         rc = mdt_handle_idmap(info);
3192                         if (rc)
3193                                 RETURN(rc);
3194                         else
3195 #endif
3196                                 RETURN(+1);
3197                 }
3198         }
3199
3200         if (unlikely(!class_connected_export(req->rq_export))) {
3201                 CERROR("operation %d on unconnected MDS from %s\n",
3202                        lustre_msg_get_opc(req->rq_reqmsg),
3203                        libcfs_id2str(req->rq_peer));
3204                 /* FIXME: For CMD cleanup, when mds_B stop, the req from
3205                  * mds_A will get -ENOTCONN(especially for ping req),
3206                  * which will cause that mds_A deactive timeout, then when
3207                  * mds_A cleanup, the cleanup process will be suspended since
3208                  * deactive timeout is not zero.
3209                  */
3210                 req->rq_status = -ENOTCONN;
3211                 target_send_reply(req, -ENOTCONN, info->mti_fail_id);
3212                 RETURN(0);
3213         }
3214
3215         /* sanity check: if the xid matches, the request must be marked as a
3216          * resent or replayed */
3217         if (req_xid_is_last(req)) {
3218                 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
3219                       (MSG_RESENT | MSG_REPLAY))) {
3220                         DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches last_xid, "
3221                                   "expected REPLAY or RESENT flag (%x)", req->rq_xid,
3222                                   lustre_msg_get_flags(req->rq_reqmsg));
3223                         LBUG();
3224                         req->rq_status = -ENOTCONN;
3225                         RETURN(-ENOTCONN);
3226                 }
3227         }
3228
3229         /* else: note the opposite is not always true; a RESENT req after a
3230          * failover will usually not match the last_xid, since it was likely
3231          * never committed. A REPLAYed request will almost never match the
3232          * last xid, however it could for a committed, but still retained,
3233          * open. */
3234
3235         obd = req->rq_export->exp_obd;
3236
3237         /* Check for aborted recovery... */
3238         if (unlikely(obd->obd_recovering)) {
3239                 int rc;
3240                 int should_process;
3241                 DEBUG_REQ(D_INFO, req, "Got new replay");
3242                 rc = mdt_filter_recovery_request(req, obd, &should_process);
3243                 if (rc != 0 || !should_process)
3244                         RETURN(rc);
3245                 else if (should_process < 0) {
3246                         req->rq_status = should_process;
3247                         rc = ptlrpc_error(req);
3248                         RETURN(rc);
3249                 }
3250         }
3251         RETURN(+1);
3252 }
3253
3254 static int mdt_msg_check_version(struct lustre_msg *msg)
3255 {
3256         int rc;
3257
3258         switch (lustre_msg_get_opc(msg)) {
3259         case MDS_CONNECT:
3260         case MDS_DISCONNECT:
3261         case OBD_PING:
3262         case SEC_CTX_INIT:
3263         case SEC_CTX_INIT_CONT:
3264         case SEC_CTX_FINI:
3265         case OBD_IDX_READ:
3266                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
3267                 if (rc)
3268                         CERROR("bad opc %u version %08x, expecting %08x\n",
3269                                lustre_msg_get_opc(msg),
3270                                lustre_msg_get_version(msg),
3271                                LUSTRE_OBD_VERSION);
3272                 break;
3273         case MDS_GETSTATUS:
3274         case MDS_GETATTR:
3275         case MDS_GETATTR_NAME:
3276         case MDS_STATFS:
3277         case MDS_READPAGE:
3278         case MDS_WRITEPAGE:
3279         case MDS_IS_SUBDIR:
3280         case MDS_REINT:
3281         case MDS_CLOSE:
3282         case MDS_DONE_WRITING:
3283         case MDS_PIN:
3284         case MDS_SYNC:
3285         case MDS_GETXATTR:
3286         case MDS_SETXATTR:
3287         case MDS_SET_INFO:
3288         case MDS_GET_INFO:
3289         case MDS_QUOTACHECK:
3290         case MDS_QUOTACTL:
3291         case QUOTA_DQACQ:
3292         case QUOTA_DQREL:
3293         case SEQ_QUERY:
3294         case FLD_QUERY:
3295                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
3296                 if (rc)
3297                         CERROR("bad opc %u version %08x, expecting %08x\n",
3298                                lustre_msg_get_opc(msg),
3299                                lustre_msg_get_version(msg),
3300                                LUSTRE_MDS_VERSION);
3301                 break;
3302         case LDLM_ENQUEUE:
3303         case LDLM_CONVERT:
3304         case LDLM_BL_CALLBACK:
3305         case LDLM_CP_CALLBACK:
3306                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
3307                 if (rc)
3308                         CERROR("bad opc %u version %08x, expecting %08x\n",
3309                                lustre_msg_get_opc(msg),
3310                                lustre_msg_get_version(msg),
3311                                LUSTRE_DLM_VERSION);
3312                 break;
3313         case OBD_LOG_CANCEL:
3314         case LLOG_ORIGIN_HANDLE_CREATE:
3315         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
3316         case LLOG_ORIGIN_HANDLE_READ_HEADER:
3317         case LLOG_ORIGIN_HANDLE_CLOSE:
3318         case LLOG_ORIGIN_HANDLE_DESTROY:
3319         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
3320         case LLOG_CATINFO:
3321                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
3322                 if (rc)
3323                         CERROR("bad opc %u version %08x, expecting %08x\n",
3324                                lustre_msg_get_opc(msg),
3325                                lustre_msg_get_version(msg),
3326                                LUSTRE_LOG_VERSION);
3327                 break;
3328         default:
3329                 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
3330                 rc = -ENOTSUPP;
3331         }
3332         return rc;
3333 }
3334
3335 static int mdt_handle0(struct ptlrpc_request *req,
3336                        struct mdt_thread_info *info,
3337                        struct mdt_opc_slice *supported)
3338 {
3339         struct mdt_handler *h;
3340         struct lustre_msg  *msg;
3341         int                 rc;
3342
3343         ENTRY;
3344
3345         if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_MDS_ALL_REQUEST_NET, OBD_FAIL_ONCE))
3346                 RETURN(0);
3347
3348         LASSERT(current->journal_info == NULL);
3349
3350         msg = req->rq_reqmsg;
3351         rc = mdt_msg_check_version(msg);
3352         if (likely(rc == 0)) {
3353                 rc = mdt_recovery(info);
3354                 if (likely(rc == +1)) {
3355                         h = mdt_handler_find(lustre_msg_get_opc(msg),
3356                                              supported);
3357                         if (likely(h != NULL)) {
3358                                 rc = mdt_req_handle(info, h, req);
3359                         } else {
3360                                 CERROR("The unsupported opc: 0x%x\n",
3361                                        lustre_msg_get_opc(msg) );
3362                                 req->rq_status = -ENOTSUPP;
3363                                 rc = ptlrpc_error(req);
3364                                 RETURN(rc);
3365                         }
3366                 }
3367         } else
3368                 CERROR(LUSTRE_MDT_NAME" drops mal-formed request\n");
3369         RETURN(rc);
3370 }
3371
3372 /*
3373  * MDT handler function called by ptlrpc service thread when request comes.
3374  *
3375  * XXX common "target" functionality should be factored into separate module
3376  * shared by mdt, ost and stand-alone services like fld.
3377  */
3378 static int mdt_handle_common(struct ptlrpc_request *req,
3379                              struct mdt_opc_slice *supported)
3380 {
3381         struct lu_env          *env;
3382         struct mdt_thread_info *info;
3383         int                     rc;
3384         ENTRY;
3385
3386         env = req->rq_svc_thread->t_env;
3387         LASSERT(env != NULL);
3388         LASSERT(env->le_ses != NULL);
3389         LASSERT(env->le_ctx.lc_thread == req->rq_svc_thread);
3390         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
3391         LASSERT(info != NULL);
3392
3393         mdt_thread_info_init(req, info);
3394
3395         rc = mdt_handle0(req, info, supported);
3396
3397         mdt_thread_info_fini(info);
3398         RETURN(rc);
3399 }
3400
3401 /*
3402  * This is called from recovery code as handler of _all_ RPC types, FLD and SEQ
3403  * as well.
3404  */
3405 int mdt_recovery_handle(struct ptlrpc_request *req)
3406 {
3407         int rc;
3408         ENTRY;
3409
3410         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3411         case FLD_QUERY:
3412                 rc = mdt_handle_common(req, mdt_fld_handlers);
3413                 break;
3414         case SEQ_QUERY:
3415                 rc = mdt_handle_common(req, mdt_seq_handlers);
3416                 break;
3417         default:
3418                 rc = mdt_handle_common(req, mdt_regular_handlers);
3419                 break;
3420         }
3421
3422         RETURN(rc);
3423 }
3424
3425 static int mdt_regular_handle(struct ptlrpc_request *req)
3426 {
3427         return mdt_handle_common(req, mdt_regular_handlers);
3428 }
3429
3430 static int mdt_readpage_handle(struct ptlrpc_request *req)
3431 {
3432         return mdt_handle_common(req, mdt_readpage_handlers);
3433 }
3434
3435 static int mdt_xmds_handle(struct ptlrpc_request *req)
3436 {
3437         return mdt_handle_common(req, mdt_xmds_handlers);
3438 }
3439
3440 static int mdt_mdsc_handle(struct ptlrpc_request *req)
3441 {
3442         return mdt_handle_common(req, mdt_seq_handlers);
3443 }
3444
3445 static int mdt_mdss_handle(struct ptlrpc_request *req)
3446 {
3447         return mdt_handle_common(req, mdt_seq_handlers);
3448 }
3449
3450 static int mdt_dtss_handle(struct ptlrpc_request *req)
3451 {
3452         return mdt_handle_common(req, mdt_seq_handlers);
3453 }
3454
3455 static int mdt_fld_handle(struct ptlrpc_request *req)
3456 {
3457         return mdt_handle_common(req, mdt_fld_handlers);
3458 }
3459
3460 enum mdt_it_code {
3461         MDT_IT_OPEN,
3462         MDT_IT_OCREAT,
3463         MDT_IT_CREATE,
3464         MDT_IT_GETATTR,
3465         MDT_IT_READDIR,
3466         MDT_IT_LOOKUP,
3467         MDT_IT_UNLINK,
3468         MDT_IT_TRUNC,
3469         MDT_IT_GETXATTR,
3470         MDT_IT_LAYOUT,
3471         MDT_IT_NR
3472 };
3473
3474 static int mdt_intent_getattr(enum mdt_it_code opcode,
3475                               struct mdt_thread_info *info,
3476                               struct ldlm_lock **,
3477                               int);
3478 static int mdt_intent_reint(enum mdt_it_code opcode,
3479                             struct mdt_thread_info *info,
3480                             struct ldlm_lock **,
3481                             int);
3482
3483 static struct mdt_it_flavor {
3484         const struct req_format *it_fmt;
3485         __u32                    it_flags;
3486         int                    (*it_act)(enum mdt_it_code ,
3487                                          struct mdt_thread_info *,
3488                                          struct ldlm_lock **,
3489                                          int);
3490         long                     it_reint;
3491 } mdt_it_flavor[] = {
3492         [MDT_IT_OPEN]     = {
3493                 .it_fmt   = &RQF_LDLM_INTENT,
3494                 /*.it_flags = HABEO_REFERO,*/
3495                 .it_flags = 0,
3496                 .it_act   = mdt_intent_reint,
3497                 .it_reint = REINT_OPEN
3498         },
3499         [MDT_IT_OCREAT]   = {
3500                 .it_fmt   = &RQF_LDLM_INTENT,
3501                 .it_flags = MUTABOR,
3502                 .it_act   = mdt_intent_reint,
3503                 .it_reint = REINT_OPEN
3504         },
3505         [MDT_IT_CREATE]   = {
3506                 .it_fmt   = &RQF_LDLM_INTENT,
3507                 .it_flags = MUTABOR,
3508                 .it_act   = mdt_intent_reint,
3509                 .it_reint = REINT_CREATE
3510         },
3511         [MDT_IT_GETATTR]  = {
3512                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3513                 .it_flags = HABEO_REFERO,
3514                 .it_act   = mdt_intent_getattr
3515         },
3516         [MDT_IT_READDIR]  = {
3517                 .it_fmt   = NULL,
3518                 .it_flags = 0,
3519                 .it_act   = NULL
3520         },
3521         [MDT_IT_LOOKUP]   = {
3522                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3523                 .it_flags = HABEO_REFERO,
3524                 .it_act   = mdt_intent_getattr
3525         },
3526         [MDT_IT_UNLINK]   = {
3527                 .it_fmt   = &RQF_LDLM_INTENT_UNLINK,
3528                 .it_flags = MUTABOR,
3529                 .it_act   = NULL,
3530                 .it_reint = REINT_UNLINK
3531         },
3532         [MDT_IT_TRUNC]    = {
3533                 .it_fmt   = NULL,
3534                 .it_flags = MUTABOR,
3535                 .it_act   = NULL
3536         },
3537         [MDT_IT_GETXATTR] = {
3538                 .it_fmt   = NULL,
3539                 .it_flags = 0,
3540                 .it_act   = NULL
3541         },
3542         [MDT_IT_LAYOUT] = {
3543                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3544                 .it_flags = HABEO_REFERO,
3545                 .it_act   = mdt_intent_getattr
3546         }
3547 };
3548
3549 int mdt_intent_lock_replace(struct mdt_thread_info *info,
3550                             struct ldlm_lock **lockp,
3551                             struct ldlm_lock *new_lock,
3552                             struct mdt_lock_handle *lh,
3553                             int flags)
3554 {
3555         struct ptlrpc_request  *req = mdt_info_req(info);
3556         struct ldlm_lock       *lock = *lockp;
3557
3558         /*
3559          * Get new lock only for cases when possible resent did not find any
3560          * lock.
3561          */
3562         if (new_lock == NULL)
3563                 new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
3564
3565         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY)) {
3566                 lh->mlh_reg_lh.cookie = 0;
3567                 RETURN(0);
3568         }
3569
3570         LASSERTF(new_lock != NULL,
3571                  "lockh "LPX64"\n", lh->mlh_reg_lh.cookie);
3572
3573         /*
3574          * If we've already given this lock to a client once, then we should
3575          * have no readers or writers.  Otherwise, we should have one reader
3576          * _or_ writer ref (which will be zeroed below) before returning the
3577          * lock to a client.
3578          */
3579         if (new_lock->l_export == req->rq_export) {
3580                 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
3581         } else {
3582                 LASSERT(new_lock->l_export == NULL);
3583                 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
3584         }
3585
3586         *lockp = new_lock;
3587
3588         if (new_lock->l_export == req->rq_export) {
3589                 /*
3590                  * Already gave this to the client, which means that we
3591                  * reconstructed a reply.
3592                  */
3593                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
3594                         MSG_RESENT);
3595                 lh->mlh_reg_lh.cookie = 0;
3596                 RETURN(ELDLM_LOCK_REPLACED);
3597         }
3598
3599         /*
3600          * Fixup the lock to be given to the client.
3601          */
3602         lock_res_and_lock(new_lock);
3603         /* Zero new_lock->l_readers and new_lock->l_writers without triggering
3604          * possible blocking AST. */
3605         while (new_lock->l_readers > 0) {
3606                 lu_ref_del(&new_lock->l_reference, "reader", new_lock);
3607                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3608                 new_lock->l_readers--;
3609         }
3610         while (new_lock->l_writers > 0) {
3611                 lu_ref_del(&new_lock->l_reference, "writer", new_lock);
3612                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3613                 new_lock->l_writers--;
3614         }
3615
3616         new_lock->l_export = class_export_lock_get(req->rq_export, new_lock);
3617         new_lock->l_blocking_ast = lock->l_blocking_ast;
3618         new_lock->l_completion_ast = lock->l_completion_ast;
3619         new_lock->l_remote_handle = lock->l_remote_handle;
3620         new_lock->l_flags &= ~LDLM_FL_LOCAL;
3621
3622         unlock_res_and_lock(new_lock);
3623
3624         cfs_hash_add(new_lock->l_export->exp_lock_hash,
3625                      &new_lock->l_remote_handle,
3626                      &new_lock->l_exp_hash);
3627
3628         LDLM_LOCK_RELEASE(new_lock);
3629         lh->mlh_reg_lh.cookie = 0;
3630
3631         RETURN(ELDLM_LOCK_REPLACED);
3632 }
3633
3634 static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
3635                                     struct ldlm_lock *new_lock,
3636                                     struct ldlm_lock **old_lock,
3637                                     struct mdt_lock_handle *lh)
3638 {
3639         struct ptlrpc_request  *req = mdt_info_req(info);
3640         struct obd_export      *exp = req->rq_export;
3641         struct lustre_handle    remote_hdl;
3642         struct ldlm_request    *dlmreq;
3643         struct ldlm_lock       *lock;
3644
3645         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
3646                 return;
3647
3648         dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
3649         remote_hdl = dlmreq->lock_handle[0];
3650
3651         /* In the function below, .hs_keycmp resolves to
3652          * ldlm_export_lock_keycmp() */
3653         /* coverity[overrun-buffer-val] */
3654         lock = cfs_hash_lookup(exp->exp_lock_hash, &remote_hdl);
3655         if (lock) {
3656                 if (lock != new_lock) {
3657                         lh->mlh_reg_lh.cookie = lock->l_handle.h_cookie;
3658                         lh->mlh_reg_mode = lock->l_granted_mode;
3659
3660                         LDLM_DEBUG(lock, "Restoring lock cookie");
3661                         DEBUG_REQ(D_DLMTRACE, req,
3662                                   "restoring lock cookie "LPX64,
3663                                   lh->mlh_reg_lh.cookie);
3664                         if (old_lock)
3665                                 *old_lock = LDLM_LOCK_GET(lock);
3666                         cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3667                         return;
3668                 }
3669
3670                 cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3671         }
3672
3673         /*
3674          * If the xid matches, then we know this is a resent request, and allow
3675          * it. (It's probably an OPEN, for which we don't send a lock.
3676          */
3677         if (req_xid_is_last(req))
3678                 return;
3679
3680         /*
3681          * This remote handle isn't enqueued, so we never received or processed
3682          * this request.  Clear MSG_RESENT, because it can be handled like any
3683          * normal request now.
3684          */
3685         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
3686
3687         DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
3688                   remote_hdl.cookie);
3689 }
3690
3691 static int mdt_intent_getattr(enum mdt_it_code opcode,
3692                               struct mdt_thread_info *info,
3693                               struct ldlm_lock **lockp,
3694                               int flags)
3695 {
3696         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3697         struct ldlm_lock       *new_lock = NULL;
3698         __u64                   child_bits;
3699         struct ldlm_reply      *ldlm_rep;
3700         struct ptlrpc_request  *req;
3701         struct mdt_body        *reqbody;
3702         struct mdt_body        *repbody;
3703         int                     rc, rc2;
3704         ENTRY;
3705
3706         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
3707         LASSERT(reqbody);
3708
3709         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
3710         LASSERT(repbody);
3711
3712         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
3713         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
3714         repbody->eadatasize = 0;
3715         repbody->aclsize = 0;
3716
3717         switch (opcode) {
3718         case MDT_IT_LOOKUP:
3719                 child_bits = MDS_INODELOCK_LOOKUP;
3720                 break;
3721         case MDT_IT_GETATTR:
3722                 child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
3723                 break;
3724         case MDT_IT_LAYOUT: {
3725                 static int printed = 0;
3726
3727                 if (!printed) {
3728                         CERROR("layout lock not supported by this version\n");
3729                         printed = 1;
3730                 }
3731                 GOTO(out_shrink, rc = -EINVAL);
3732                 break;
3733         }
3734         default:
3735                 CERROR("Unsupported intent (%d)\n", opcode);
3736                 GOTO(out_shrink, rc = -EINVAL);
3737         }
3738
3739         rc = mdt_init_ucred(info, reqbody);
3740         if (rc)
3741                 GOTO(out_shrink, rc);
3742
3743         req = info->mti_pill->rc_req;
3744         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3745         mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
3746
3747         /* Get lock from request for possible resent case. */
3748         mdt_intent_fixup_resent(info, *lockp, &new_lock, lhc);
3749
3750         ldlm_rep->lock_policy_res2 =
3751                 mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
3752
3753         if (mdt_get_disposition(ldlm_rep, DISP_LOOKUP_NEG))
3754                 ldlm_rep->lock_policy_res2 = 0;
3755         if (!mdt_get_disposition(ldlm_rep, DISP_LOOKUP_POS) ||
3756             ldlm_rep->lock_policy_res2) {
3757                 lhc->mlh_reg_lh.cookie = 0ull;
3758                 GOTO(out_ucred, rc = ELDLM_LOCK_ABORTED);
3759         }
3760
3761         rc = mdt_intent_lock_replace(info, lockp, new_lock, lhc, flags);
3762         EXIT;
3763 out_ucred:
3764         mdt_exit_ucred(info);
3765 out_shrink:
3766         mdt_client_compatibility(info);
3767         rc2 = mdt_fix_reply(info);
3768         if (rc == 0)
3769                 rc = rc2;
3770         return rc;
3771 }
3772
3773 static int mdt_intent_reint(enum mdt_it_code opcode,
3774                             struct mdt_thread_info *info,
3775                             struct ldlm_lock **lockp,
3776                             int flags)
3777 {
3778         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3779         struct ldlm_reply      *rep = NULL;
3780         long                    opc;
3781         int                     rc;
3782
3783         static const struct req_format *intent_fmts[REINT_MAX] = {
3784                 [REINT_CREATE]  = &RQF_LDLM_INTENT_CREATE,
3785                 [REINT_OPEN]    = &RQF_LDLM_INTENT_OPEN
3786         };
3787
3788         ENTRY;
3789
3790         opc = mdt_reint_opcode(info, intent_fmts);
3791         if (opc < 0)
3792                 RETURN(opc);
3793
3794         if (mdt_it_flavor[opcode].it_reint != opc) {
3795                 CERROR("Reint code %ld doesn't match intent: %d\n",
3796                        opc, opcode);
3797                 RETURN(err_serious(-EPROTO));
3798         }
3799
3800         /* Get lock from request for possible resent case. */
3801         mdt_intent_fixup_resent(info, *lockp, NULL, lhc);
3802
3803         rc = mdt_reint_internal(info, lhc, opc);
3804
3805         /* Check whether the reply has been packed successfully. */
3806         if (mdt_info_req(info)->rq_repmsg != NULL)
3807                 rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3808         if (rep == NULL)
3809                 RETURN(err_serious(-EFAULT));
3810
3811         /* MDC expects this in any case */
3812         if (rc != 0)
3813                 mdt_set_disposition(info, rep, DISP_LOOKUP_EXECD);
3814
3815         /* Cross-ref case, the lock should be returned to the client */
3816         if (rc == -EREMOTE) {
3817                 LASSERT(lustre_handle_is_used(&lhc->mlh_reg_lh));
3818                 rep->lock_policy_res2 = 0;
3819                 rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3820                 RETURN(rc);
3821         }
3822         rep->lock_policy_res2 = clear_serious(rc);
3823
3824         if (rep->lock_policy_res2 == -ENOENT &&
3825             mdt_get_disposition(rep, DISP_LOOKUP_NEG))
3826                 rep->lock_policy_res2 = 0;
3827
3828         if (rc == -ENOTCONN || rc == -ENODEV ||
3829             rc == -EOVERFLOW) { /**< if VBR failure then return error */
3830                 /*
3831                  * If it is the disconnect error (ENODEV & ENOCONN), the error
3832                  * will be returned by rq_status, and client at ptlrpc layer
3833                  * will detect this, then disconnect, reconnect the import
3834                  * immediately, instead of impacting the following the rpc.
3835                  */
3836                 lhc->mlh_reg_lh.cookie = 0ull;
3837                 RETURN(rc);
3838         } else {
3839                 /*
3840                  * For other cases, the error will be returned by intent.
3841                  * and client will retrieve the result from intent.
3842                  */
3843                  /*
3844                   * FIXME: when open lock is finished, that should be
3845                   * checked here.
3846                   */
3847                 if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
3848                         LASSERTF(rc == 0, "Error occurred but lock handle "
3849                                  "is still in use\n");
3850                         rep->lock_policy_res2 = 0;
3851                         rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3852                         RETURN(rc);
3853                 } else {
3854                         lhc->mlh_reg_lh.cookie = 0ull;
3855                         RETURN(ELDLM_LOCK_ABORTED);
3856                 }
3857         }
3858 }
3859
3860 static int mdt_intent_code(long itcode)
3861 {
3862         int rc;
3863
3864         switch(itcode) {
3865         case IT_OPEN:
3866                 rc = MDT_IT_OPEN;
3867                 break;
3868         case IT_OPEN|IT_CREAT:
3869                 rc = MDT_IT_OCREAT;
3870                 break;
3871         case IT_CREAT:
3872                 rc = MDT_IT_CREATE;
3873                 break;
3874         case IT_READDIR:
3875                 rc = MDT_IT_READDIR;
3876                 break;
3877         case IT_GETATTR:
3878                 rc = MDT_IT_GETATTR;
3879                 break;
3880         case IT_LOOKUP:
3881                 rc = MDT_IT_LOOKUP;
3882                 break;
3883         case IT_UNLINK:
3884                 rc = MDT_IT_UNLINK;
3885                 break;
3886         case IT_TRUNC:
3887                 rc = MDT_IT_TRUNC;
3888                 break;
3889         case IT_GETXATTR:
3890                 rc = MDT_IT_GETXATTR;
3891                 break;
3892         case IT_LAYOUT:
3893                 rc = MDT_IT_LAYOUT;
3894                 break;
3895         default:
3896                 CERROR("Unknown intent opcode: %ld\n", itcode);
3897                 rc = -EINVAL;
3898                 break;
3899         }
3900         return rc;
3901 }
3902
3903 static int mdt_intent_opc(long itopc, struct mdt_thread_info *info,
3904                           struct ldlm_lock **lockp, int flags)
3905 {
3906         struct req_capsule   *pill;
3907         struct mdt_it_flavor *flv;
3908         int opc;
3909         int rc;
3910         ENTRY;
3911
3912         opc = mdt_intent_code(itopc);
3913         if (opc < 0)
3914                 RETURN(-EINVAL);
3915
3916         pill = info->mti_pill;
3917         flv  = &mdt_it_flavor[opc];
3918
3919         if (flv->it_fmt != NULL)
3920                 req_capsule_extend(pill, flv->it_fmt);
3921
3922         rc = mdt_unpack_req_pack_rep(info, flv->it_flags);
3923         if (rc == 0) {
3924                 struct ptlrpc_request *req = mdt_info_req(info);
3925                 if (flv->it_flags & MUTABOR &&
3926                     req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
3927                         RETURN(-EROFS);
3928         }
3929         if (rc == 0 && flv->it_act != NULL) {
3930                 /* execute policy */
3931                 rc = flv->it_act(opc, info, lockp, flags);
3932         } else {
3933                 rc = -EOPNOTSUPP;
3934         }
3935         RETURN(rc);
3936 }
3937
3938 static int mdt_intent_policy(struct ldlm_namespace *ns,
3939                              struct ldlm_lock **lockp, void *req_cookie,
3940                              ldlm_mode_t mode, int flags, void *data)
3941 {
3942         struct mdt_thread_info *info;
3943         struct ptlrpc_request  *req  =  req_cookie;
3944         struct ldlm_intent     *it;
3945         struct req_capsule     *pill;
3946         int rc;
3947
3948         ENTRY;
3949
3950         LASSERT(req != NULL);
3951
3952         info = lu_context_key_get(&req->rq_svc_thread->t_env->le_ctx,
3953                                   &mdt_thread_key);
3954         LASSERT(info != NULL);
3955         pill = info->mti_pill;
3956         LASSERT(pill->rc_req == req);
3957
3958         if (req->rq_reqmsg->lm_bufcount > DLM_INTENT_IT_OFF) {
3959                 req_capsule_extend(pill, &RQF_LDLM_INTENT);
3960                 it = req_capsule_client_get(pill, &RMF_LDLM_INTENT);
3961                 if (it != NULL) {
3962                         rc = mdt_intent_opc(it->opc, info, lockp, flags);
3963                         if (rc == 0)
3964                                 rc = ELDLM_OK;
3965
3966                         /* Lock without inodebits makes no sense and will oops
3967                          * later in ldlm. Let's check it now to see if we have
3968                          * ibits corrupted somewhere in mdt_intent_opc().
3969                          * The case for client miss to set ibits has been
3970                          * processed by others. */
3971                         LASSERT(ergo(info->mti_dlm_req->lock_desc.l_resource.\
3972                                         lr_type == LDLM_IBITS,
3973                                      info->mti_dlm_req->lock_desc.\
3974                                         l_policy_data.l_inodebits.bits != 0));
3975                 } else
3976                         rc = err_serious(-EFAULT);
3977         } else {
3978                 /* No intent was provided */
3979                 LASSERT(pill->rc_fmt == &RQF_LDLM_ENQUEUE);
3980                 rc = req_capsule_server_pack(pill);
3981                 if (rc)
3982                         rc = err_serious(rc);
3983         }
3984         RETURN(rc);
3985 }
3986
3987 static int mdt_seq_fini(const struct lu_env *env,
3988                         struct mdt_device *m)
3989 {
3990         struct md_site *ms = mdt_md_site(m);
3991         ENTRY;
3992
3993         if (ms != NULL) {
3994                 if (ms->ms_server_seq) {
3995                         seq_server_fini(ms->ms_server_seq, env);
3996                         OBD_FREE_PTR(ms->ms_server_seq);
3997                         ms->ms_server_seq = NULL;
3998         }
3999
4000                 if (ms->ms_control_seq) {
4001                         seq_server_fini(ms->ms_control_seq, env);
4002                         OBD_FREE_PTR(ms->ms_control_seq);
4003                         ms->ms_control_seq = NULL;
4004         }
4005
4006                 if (ms->ms_client_seq) {
4007                         seq_client_fini(ms->ms_client_seq);
4008                         OBD_FREE_PTR(ms->ms_client_seq);
4009                         ms->ms_client_seq = NULL;
4010                 }
4011         }
4012
4013         RETURN(0);
4014 }
4015
4016 static int mdt_seq_init(const struct lu_env *env,
4017                         const char *uuid,
4018                         struct mdt_device *m)
4019 {
4020         struct md_site *ms;
4021         char *prefix;
4022         int rc;
4023         ENTRY;
4024
4025         ms = mdt_md_site(m);
4026
4027         /*
4028          * This is sequence-controller node. Init seq-controller server on local
4029          * MDT.
4030          */
4031         if (ms->ms_node_id == 0) {
4032                 LASSERT(ms->ms_control_seq == NULL);
4033
4034                 OBD_ALLOC_PTR(ms->ms_control_seq);
4035                 if (ms->ms_control_seq == NULL)
4036                         RETURN(-ENOMEM);
4037
4038                 rc = seq_server_init(ms->ms_control_seq,
4039                                      m->mdt_bottom, uuid,
4040                                      LUSTRE_SEQ_CONTROLLER,
4041                                      ms,
4042                                      env);
4043
4044                 if (rc)
4045                         GOTO(out_seq_fini, rc);
4046
4047                 OBD_ALLOC_PTR(ms->ms_client_seq);
4048                 if (ms->ms_client_seq == NULL)
4049                         GOTO(out_seq_fini, rc = -ENOMEM);
4050
4051                 OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
4052                 if (prefix == NULL) {
4053                         OBD_FREE_PTR(ms->ms_client_seq);
4054                         GOTO(out_seq_fini, rc = -ENOMEM);
4055                 }
4056
4057                 snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
4058                          uuid);
4059
4060                 /*
4061                  * Init seq-controller client after seq-controller server is
4062                  * ready. Pass ms->ms_control_seq to it for direct talking.
4063                  */
4064                 rc = seq_client_init(ms->ms_client_seq, NULL,
4065                                      LUSTRE_SEQ_METADATA, prefix,
4066                                      ms->ms_control_seq);
4067                 OBD_FREE(prefix, MAX_OBD_NAME + 5);
4068
4069                 if (rc)
4070                         GOTO(out_seq_fini, rc);
4071         }
4072
4073         /* Init seq-server on local MDT */
4074         LASSERT(ms->ms_server_seq == NULL);
4075
4076         OBD_ALLOC_PTR(ms->ms_server_seq);
4077         if (ms->ms_server_seq == NULL)
4078                 GOTO(out_seq_fini, rc = -ENOMEM);
4079
4080         rc = seq_server_init(ms->ms_server_seq,
4081                              m->mdt_bottom, uuid,
4082                              LUSTRE_SEQ_SERVER,
4083                              ms,
4084                              env);
4085         if (rc)
4086                 GOTO(out_seq_fini, rc = -ENOMEM);
4087
4088         /* Assign seq-controller client to local seq-server. */
4089         if (ms->ms_node_id == 0) {
4090                 LASSERT(ms->ms_client_seq != NULL);
4091
4092                 rc = seq_server_set_cli(ms->ms_server_seq,
4093                                         ms->ms_client_seq,
4094                                         env);
4095         }
4096
4097         EXIT;
4098 out_seq_fini:
4099         if (rc)
4100                 mdt_seq_fini(env, m);
4101
4102         return rc;
4103 }
4104 /*
4105  * Init client sequence manager which is used by local MDS to talk to sequence
4106  * controller on remote node.
4107  */
4108 static int mdt_seq_init_cli(const struct lu_env *env,
4109                             struct mdt_device *m,
4110                             struct lustre_cfg *cfg)
4111 {
4112         struct md_site    *ms = mdt_md_site(m);
4113         struct obd_device *mdc;
4114         struct obd_uuid   *uuidp, *mdcuuidp;
4115         char              *uuid_str, *mdc_uuid_str;
4116         int                rc;
4117         int                index;
4118         struct mdt_thread_info *info;
4119         char *p, *index_string = lustre_cfg_string(cfg, 2);
4120         ENTRY;
4121
4122         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4123         uuidp = &info->mti_u.uuid[0];
4124         mdcuuidp = &info->mti_u.uuid[1];
4125
4126         LASSERT(index_string);
4127
4128         index = simple_strtol(index_string, &p, 10);
4129         if (*p) {
4130                 CERROR("Invalid index in lustre_cgf, offset 2\n");
4131                 RETURN(-EINVAL);
4132         }
4133
4134         /* check if this is adding the first MDC and controller is not yet
4135          * initialized. */
4136         if (index != 0 || ms->ms_client_seq)
4137                 RETURN(0);
4138
4139         uuid_str = lustre_cfg_string(cfg, 1);
4140         mdc_uuid_str = lustre_cfg_string(cfg, 4);
4141         obd_str2uuid(uuidp, uuid_str);
4142         obd_str2uuid(mdcuuidp, mdc_uuid_str);
4143
4144         mdc = class_find_client_obd(uuidp, LUSTRE_MDC_NAME, mdcuuidp);
4145         if (!mdc) {
4146                 CERROR("can't find controller MDC by uuid %s\n",
4147                        uuid_str);
4148                 rc = -ENOENT;
4149         } else if (!mdc->obd_set_up) {
4150                 CERROR("target %s not set up\n", mdc->obd_name);
4151                 rc = -EINVAL;
4152         } else {
4153                 LASSERT(ms->ms_control_exp);
4154                 OBD_ALLOC_PTR(ms->ms_client_seq);
4155                 if (ms->ms_client_seq != NULL) {
4156                         char *prefix;
4157
4158                         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
4159                         if (!prefix)
4160                                 RETURN(-ENOMEM);
4161
4162                         snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
4163                                  mdc->obd_name);
4164
4165                         rc = seq_client_init(ms->ms_client_seq,
4166                                              ms->ms_control_exp,
4167                                              LUSTRE_SEQ_METADATA,
4168                                              prefix, NULL);
4169                         OBD_FREE(prefix, MAX_OBD_NAME + 5);
4170                 } else
4171                         rc = -ENOMEM;
4172
4173                 if (rc)
4174                         RETURN(rc);
4175
4176                 LASSERT(ms->ms_server_seq != NULL);
4177                 rc = seq_server_set_cli(ms->ms_server_seq, ms->ms_client_seq,
4178                                         env);
4179         }
4180
4181         RETURN(rc);
4182 }
4183
4184 static void mdt_seq_fini_cli(struct mdt_device *m)
4185 {
4186         struct md_site *ms;
4187
4188         ENTRY;
4189
4190         ms = mdt_md_site(m);
4191
4192         if (ms != NULL) {
4193                 if (ms->ms_server_seq)
4194                         seq_server_set_cli(ms->ms_server_seq,
4195                                    NULL, NULL);
4196
4197                 if (ms->ms_control_exp) {
4198                         class_export_put(ms->ms_control_exp);
4199                         ms->ms_control_exp = NULL;
4200                 }
4201         }
4202         EXIT;
4203 }
4204
4205 /*
4206  * FLD wrappers
4207  */
4208 static int mdt_fld_fini(const struct lu_env *env,
4209                         struct mdt_device *m)
4210 {
4211         struct md_site *ms = mdt_md_site(m);
4212         ENTRY;
4213
4214         if (ms && ms->ms_server_fld) {
4215                 fld_server_fini(ms->ms_server_fld, env);
4216                 OBD_FREE_PTR(ms->ms_server_fld);
4217                 ms->ms_server_fld = NULL;
4218         }
4219
4220         RETURN(0);
4221 }
4222
4223 static int mdt_fld_init(const struct lu_env *env,
4224                         const char *uuid,
4225                         struct mdt_device *m)
4226 {
4227         struct md_site *ms;
4228         int rc;
4229         ENTRY;
4230
4231         ms = mdt_md_site(m);
4232
4233         OBD_ALLOC_PTR(ms->ms_server_fld);
4234         if (ms->ms_server_fld == NULL)
4235                 RETURN(rc = -ENOMEM);
4236
4237         rc = fld_server_init(ms->ms_server_fld,
4238                              m->mdt_bottom, uuid,
4239                              env, ms->ms_node_id);
4240         if (rc) {
4241                 OBD_FREE_PTR(ms->ms_server_fld);
4242                 ms->ms_server_fld = NULL;
4243                 RETURN(rc);
4244         }
4245
4246         RETURN(0);
4247 }
4248
4249 /* device init/fini methods */
4250 static void mdt_stop_ptlrpc_service(struct mdt_device *m)
4251 {
4252         ENTRY;
4253         if (m->mdt_regular_service != NULL) {
4254                 ptlrpc_unregister_service(m->mdt_regular_service);
4255                 m->mdt_regular_service = NULL;
4256         }
4257         if (m->mdt_readpage_service != NULL) {
4258                 ptlrpc_unregister_service(m->mdt_readpage_service);
4259                 m->mdt_readpage_service = NULL;
4260         }
4261         if (m->mdt_xmds_service != NULL) {
4262                 ptlrpc_unregister_service(m->mdt_xmds_service);
4263                 m->mdt_xmds_service = NULL;
4264         }
4265         if (m->mdt_setattr_service != NULL) {
4266                 ptlrpc_unregister_service(m->mdt_setattr_service);
4267                 m->mdt_setattr_service = NULL;
4268         }
4269         if (m->mdt_mdsc_service != NULL) {
4270                 ptlrpc_unregister_service(m->mdt_mdsc_service);
4271                 m->mdt_mdsc_service = NULL;
4272         }
4273         if (m->mdt_mdss_service != NULL) {
4274                 ptlrpc_unregister_service(m->mdt_mdss_service);
4275                 m->mdt_mdss_service = NULL;
4276         }
4277         if (m->mdt_dtss_service != NULL) {
4278                 ptlrpc_unregister_service(m->mdt_dtss_service);
4279                 m->mdt_dtss_service = NULL;
4280         }
4281         if (m->mdt_fld_service != NULL) {
4282                 ptlrpc_unregister_service(m->mdt_fld_service);
4283                 m->mdt_fld_service = NULL;
4284         }
4285         EXIT;
4286 }
4287
4288 static int mdt_start_ptlrpc_service(struct mdt_device *m)
4289 {
4290         static struct ptlrpc_service_conf conf;
4291         cfs_proc_dir_entry_t *procfs_entry;
4292         int rc = 0;
4293         ENTRY;
4294
4295         m->mdt_ldlm_client = &m->mdt_md_dev.md_lu_dev.ld_obd->obd_ldlm_client;
4296         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
4297                            "mdt_ldlm_client", m->mdt_ldlm_client);
4298
4299         procfs_entry = m->mdt_md_dev.md_lu_dev.ld_obd->obd_proc_entry;
4300
4301         conf = (typeof(conf)) {
4302                 .psc_name               = LUSTRE_MDT_NAME,
4303                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4304                 .psc_buf                = {
4305                         .bc_nbufs               = MDS_NBUFS,
4306                         .bc_buf_size            = MDS_BUFSIZE,
4307                         .bc_req_max_size        = MDS_MAXREQSIZE,
4308                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4309                         .bc_req_portal          = MDS_REQUEST_PORTAL,
4310                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4311                 },
4312                 /*
4313                  * We'd like to have a mechanism to set this on a per-device
4314                  * basis, but alas...
4315                  */
4316                 .psc_thr                = {
4317                         .tc_thr_name            = LUSTRE_MDT_NAME,
4318                         .tc_thr_factor          = MDT_THR_FACTOR,
4319                         .tc_nthrs_init          = MDT_NTHRS_INIT,
4320                         .tc_nthrs_base          = MDT_NTHRS_BASE,
4321                         .tc_nthrs_max           = MDT_NTHRS_MAX,
4322                         .tc_nthrs_user          = mds_num_threads,
4323                         .tc_cpu_affinity        = 1,
4324                         .tc_ctx_tags            = LCT_MD_THREAD,
4325                 },
4326                 .psc_cpt                = {
4327                         .cc_pattern             = mds_num_cpts,
4328                 },
4329                 .psc_ops                = {
4330                         .so_req_handler         = mdt_regular_handle,
4331                         .so_req_printer         = target_print_req,
4332                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4333                 },
4334         };
4335         m->mdt_regular_service = ptlrpc_register_service(&conf, procfs_entry);
4336         if (IS_ERR(m->mdt_regular_service)) {
4337                 rc = PTR_ERR(m->mdt_regular_service);
4338                 CERROR("failed to start regular mdt service: %d\n", rc);
4339                 m->mdt_regular_service = NULL;
4340
4341                 RETURN(rc);
4342         }
4343
4344         /*
4345          * readpage service configuration. Parameters have to be adjusted,
4346          * ideally.
4347          */
4348         memset(&conf, 0, sizeof(conf));
4349         conf = (typeof(conf)) {
4350                 .psc_name               = LUSTRE_MDT_NAME "_readpage",
4351                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4352                 .psc_buf                = {
4353                         .bc_nbufs               = MDS_NBUFS,
4354                         .bc_buf_size            = MDS_BUFSIZE,
4355                         .bc_req_max_size        = MDS_MAXREQSIZE,
4356                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4357                         .bc_req_portal          = MDS_READPAGE_PORTAL,
4358                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4359                 },
4360                 .psc_thr                = {
4361                         .tc_thr_name            = "mdt_rdpg",
4362                         .tc_thr_factor          = MDT_RDPG_THR_FACTOR,
4363                         .tc_nthrs_init          = MDT_RDPG_NTHRS_INIT,
4364                         .tc_nthrs_base          = MDT_RDPG_NTHRS_BASE,
4365                         .tc_nthrs_max           = MDT_RDPG_NTHRS_MAX,
4366                         .tc_nthrs_user          = mds_rdpg_num_threads,
4367                         .tc_cpu_affinity        = 1,
4368                         .tc_ctx_tags            = LCT_MD_THREAD,
4369                 },
4370                 .psc_cpt                = {
4371                         .cc_pattern             = mds_rdpg_num_cpts,
4372                 },
4373                 .psc_ops                = {
4374                         .so_req_handler         = mdt_readpage_handle,
4375                         .so_req_printer         = target_print_req,
4376                         .so_hpreq_handler       = NULL,
4377                 },
4378         };
4379         m->mdt_readpage_service = ptlrpc_register_service(&conf, procfs_entry);
4380         if (IS_ERR(m->mdt_readpage_service)) {
4381                 rc = PTR_ERR(m->mdt_readpage_service);
4382                 CERROR("failed to start readpage service: %d\n", rc);
4383                 m->mdt_readpage_service = NULL;
4384
4385                 GOTO(err_mdt_svc, rc);
4386         }
4387
4388         /*
4389          * setattr service configuration.
4390          *
4391          * XXX To keep the compatibility with old client(< 2.2), we need to
4392          * preserve this portal for a certain time, it should be removed
4393          * eventually. LU-617.
4394          */
4395         memset(&conf, 0, sizeof(conf));
4396         conf = (typeof(conf)) {
4397                 .psc_name               = LUSTRE_MDT_NAME "_setattr",
4398                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4399                 .psc_buf                = {
4400                         .bc_nbufs               = MDS_NBUFS,
4401                         .bc_buf_size            = MDS_BUFSIZE,
4402                         .bc_req_max_size        = MDS_MAXREQSIZE,
4403                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4404                         .bc_req_portal          = MDS_SETATTR_PORTAL,
4405                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4406                 },
4407                 .psc_thr                = {
4408                         .tc_thr_name            = "mdt_attr",
4409                         .tc_thr_factor          = MDT_SETA_THR_FACTOR,
4410                         .tc_nthrs_init          = MDT_SETA_NTHRS_INIT,
4411                         .tc_nthrs_base          = MDT_SETA_NTHRS_BASE,
4412                         .tc_nthrs_max           = MDT_SETA_NTHRS_MAX,
4413                         .tc_nthrs_user          = mds_attr_num_threads,
4414                         .tc_cpu_affinity        = 1,
4415                         .tc_ctx_tags            = LCT_MD_THREAD,
4416                 },
4417                 .psc_cpt                = {
4418                         .cc_pattern             = mds_attr_num_cpts,
4419                 },
4420                 .psc_ops                = {
4421                         .so_req_handler         = mdt_regular_handle,
4422                         .so_req_printer         = target_print_req,
4423                         .so_hpreq_handler       = NULL,
4424                 },
4425         };
4426         m->mdt_setattr_service = ptlrpc_register_service(&conf, procfs_entry);
4427         if (IS_ERR(m->mdt_setattr_service)) {
4428                 rc = PTR_ERR(m->mdt_setattr_service);
4429                 CERROR("failed to start setattr service: %d\n", rc);
4430                 m->mdt_setattr_service = NULL;
4431
4432                 GOTO(err_mdt_svc, rc);
4433         }
4434
4435         /*
4436          * sequence controller service configuration
4437          */
4438         memset(&conf, 0, sizeof(conf));
4439         conf = (typeof(conf)) {
4440                 .psc_name               = LUSTRE_MDT_NAME "_mdsc",
4441                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4442                 .psc_buf                = {
4443                         .bc_nbufs               = MDS_NBUFS,
4444                         .bc_buf_size            = MDS_BUFSIZE,
4445                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4446                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4447                         .bc_req_portal          = SEQ_CONTROLLER_PORTAL,
4448                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4449                 },
4450                 .psc_thr                = {
4451                         .tc_thr_name            = "mdt_mdsc",
4452                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4453                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4454                         .tc_ctx_tags            = LCT_MD_THREAD,
4455                 },
4456                 .psc_ops                = {
4457                         .so_req_handler         = mdt_mdsc_handle,
4458                         .so_req_printer         = target_print_req,
4459                         .so_hpreq_handler       = NULL,
4460                 },
4461         };
4462         m->mdt_mdsc_service = ptlrpc_register_service(&conf, procfs_entry);
4463         if (IS_ERR(m->mdt_mdsc_service)) {
4464                 rc = PTR_ERR(m->mdt_mdsc_service);
4465                 CERROR("failed to start seq controller service: %d\n", rc);
4466                 m->mdt_mdsc_service = NULL;
4467
4468                 GOTO(err_mdt_svc, rc);
4469         }
4470
4471         /*
4472          * metadata sequence server service configuration
4473          */
4474         memset(&conf, 0, sizeof(conf));
4475         conf = (typeof(conf)) {
4476                 .psc_name               = LUSTRE_MDT_NAME "_mdss",
4477                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4478                 .psc_buf                = {
4479                         .bc_nbufs               = MDS_NBUFS,
4480                         .bc_buf_size            = MDS_BUFSIZE,
4481                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4482                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4483                         .bc_req_portal          = SEQ_METADATA_PORTAL,
4484                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4485                 },
4486                 .psc_thr                = {
4487                         .tc_thr_name            = "mdt_mdss",
4488                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4489                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4490                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4491                 },
4492                 .psc_ops                = {
4493                         .so_req_handler         = mdt_mdss_handle,
4494                         .so_req_printer         = target_print_req,
4495                         .so_hpreq_handler       = NULL,
4496                 },
4497         };
4498         m->mdt_mdss_service = ptlrpc_register_service(&conf, procfs_entry);
4499         if (IS_ERR(m->mdt_mdss_service)) {
4500                 rc = PTR_ERR(m->mdt_mdss_service);
4501                 CERROR("failed to start metadata seq server service: %d\n", rc);
4502                 m->mdt_mdss_service = NULL;
4503
4504                 GOTO(err_mdt_svc, rc);
4505         }
4506
4507         /*
4508          * Data sequence server service configuration. We want to have really
4509          * cluster-wide sequences space. This is why we start only one sequence
4510          * controller which manages space.
4511          */
4512         memset(&conf, 0, sizeof(conf));
4513         conf = (typeof(conf)) {
4514                 .psc_name               = LUSTRE_MDT_NAME "_dtss",
4515                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4516                 .psc_buf                = {
4517                         .bc_nbufs               = MDS_NBUFS,
4518                         .bc_buf_size            = MDS_BUFSIZE,
4519                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4520                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4521                         .bc_req_portal          = SEQ_DATA_PORTAL,
4522                         .bc_rep_portal          = OSC_REPLY_PORTAL,
4523                 },
4524                 .psc_thr                = {
4525                         .tc_thr_name            = "mdt_dtss",
4526                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4527                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4528                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4529                 },
4530                 .psc_ops                = {
4531                         .so_req_handler         = mdt_dtss_handle,
4532                         .so_req_printer         = target_print_req,
4533                         .so_hpreq_handler       = NULL,
4534                 },
4535         };
4536         m->mdt_dtss_service = ptlrpc_register_service(&conf, procfs_entry);
4537         if (IS_ERR(m->mdt_dtss_service)) {
4538                 rc = PTR_ERR(m->mdt_dtss_service);
4539                 CERROR("failed to start data seq server service: %d\n", rc);
4540                 m->mdt_dtss_service = NULL;
4541
4542                 GOTO(err_mdt_svc, rc);
4543         }
4544
4545         /* FLD service start */
4546         memset(&conf, 0, sizeof(conf));
4547         conf = (typeof(conf)) {
4548                 .psc_name            = LUSTRE_MDT_NAME "_fld",
4549                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4550                 .psc_buf                = {
4551                         .bc_nbufs               = MDS_NBUFS,
4552                         .bc_buf_size            = MDS_BUFSIZE,
4553                         .bc_req_max_size        = FLD_MAXREQSIZE,
4554                         .bc_rep_max_size        = FLD_MAXREPSIZE,
4555                         .bc_req_portal          = FLD_REQUEST_PORTAL,
4556                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4557                 },
4558                 .psc_thr                = {
4559                         .tc_thr_name            = "mdt_fld",
4560                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4561                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4562                         .tc_ctx_tags            = LCT_DT_THREAD | LCT_MD_THREAD
4563                 },
4564                 .psc_ops                = {
4565                         .so_req_handler         = mdt_fld_handle,
4566                         .so_req_printer         = target_print_req,
4567                         .so_hpreq_handler       = NULL,
4568                 },
4569         };
4570         m->mdt_fld_service = ptlrpc_register_service(&conf, procfs_entry);
4571         if (IS_ERR(m->mdt_fld_service)) {
4572                 rc = PTR_ERR(m->mdt_fld_service);
4573                 CERROR("failed to start fld service: %d\n", rc);
4574                 m->mdt_fld_service = NULL;
4575
4576                 GOTO(err_mdt_svc, rc);
4577         }
4578
4579         /*
4580          * mds-mds service configuration. Separate portal is used to allow
4581          * mds-mds requests be not blocked during recovery.
4582          */
4583         memset(&conf, 0, sizeof(conf));
4584         conf = (typeof(conf)) {
4585                 .psc_name               = LUSTRE_MDT_NAME "_mds",
4586                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4587                 .psc_buf                = {
4588                         .bc_nbufs               = MDS_NBUFS,
4589                         .bc_buf_size            = MDS_BUFSIZE,
4590                         .bc_req_max_size        = MDS_MAXREQSIZE,
4591                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4592                         .bc_req_portal          = MDS_MDS_PORTAL,
4593                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4594                 },
4595                 .psc_thr                = {
4596                         .tc_thr_name            = "mdt_mds",
4597                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4598                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4599                         .tc_ctx_tags            = LCT_MD_THREAD,
4600                 },
4601                 .psc_ops                = {
4602                         .so_req_handler         = mdt_xmds_handle,
4603                         .so_req_printer         = target_print_req,
4604                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4605                 },
4606         };
4607         m->mdt_xmds_service = ptlrpc_register_service(&conf, procfs_entry);
4608         if (IS_ERR(m->mdt_xmds_service)) {
4609                 rc = PTR_ERR(m->mdt_xmds_service);
4610                 CERROR("failed to start xmds service: %d\n", rc);
4611                 m->mdt_xmds_service = NULL;
4612
4613                 GOTO(err_mdt_svc, rc);
4614         }
4615
4616         EXIT;
4617 err_mdt_svc:
4618         if (rc)
4619                 mdt_stop_ptlrpc_service(m);
4620
4621         return rc;
4622 }
4623
4624 static void mdt_stack_fini(const struct lu_env *env,
4625                            struct mdt_device *m, struct lu_device *top)
4626 {
4627         struct obd_device       *obd = mdt2obd_dev(m);
4628         struct lustre_cfg_bufs  *bufs;
4629         struct lustre_cfg       *lcfg;
4630         struct mdt_thread_info  *info;
4631         char flags[3]="";
4632         ENTRY;
4633
4634         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4635         LASSERT(info != NULL);
4636
4637         lu_dev_del_linkage(top->ld_site, top);
4638
4639         lu_site_purge(env, top->ld_site, -1);
4640
4641         bufs = &info->mti_u.bufs;
4642         /* process cleanup, pass mdt obd name to get obd umount flags */
4643         /* another purpose is to let all layers to release their objects */
4644         lustre_cfg_bufs_reset(bufs, obd->obd_name);
4645         if (obd->obd_force)
4646                 strcat(flags, "F");
4647         if (obd->obd_fail)
4648                 strcat(flags, "A");
4649         lustre_cfg_bufs_set_string(bufs, 1, flags);
4650         lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
4651         if (!lcfg) {
4652                 CERROR("Cannot alloc lcfg!\n");
4653                 return;
4654         }
4655         LASSERT(top);
4656         top->ld_ops->ldo_process_config(env, top, lcfg);
4657         lustre_cfg_free(lcfg);
4658
4659         lu_site_purge(env, top->ld_site, -1);
4660
4661         m->mdt_child = NULL;
4662         m->mdt_bottom = NULL;
4663
4664         obd_disconnect(m->mdt_child_exp);
4665         m->mdt_child_exp = NULL;
4666
4667         obd_disconnect(m->mdt_bottom_exp);
4668         m->mdt_child_exp = NULL;
4669 }
4670
4671 static int mdt_connect_to_next(const struct lu_env *env, struct mdt_device *m,
4672                                const char *next, struct obd_export **exp)
4673 {
4674         struct obd_connect_data *data = NULL;
4675         struct obd_device       *obd;
4676         int                      rc;
4677         ENTRY;
4678
4679         OBD_ALLOC_PTR(data);
4680         if (data == NULL)
4681                 GOTO(out, rc = -ENOMEM);
4682
4683         obd = class_name2obd(next);
4684         if (obd == NULL) {
4685                 CERROR("%s: can't locate next device: %s\n",
4686                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next);
4687                 GOTO(out, rc = -ENOTCONN);
4688         }
4689
4690         data->ocd_connect_flags = OBD_CONNECT_VERSION;
4691         data->ocd_version = LUSTRE_VERSION_CODE;
4692
4693         rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
4694         if (rc) {
4695                 CERROR("%s: cannot connect to next dev %s (%d)\n",
4696                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next, rc);
4697                 GOTO(out, rc);
4698         }
4699
4700 out:
4701         if (data)
4702                 OBD_FREE_PTR(data);
4703         RETURN(rc);
4704 }
4705
4706 static int mdt_stack_init(const struct lu_env *env, struct mdt_device *mdt,
4707                           struct lustre_cfg *cfg)
4708 {
4709         char                   *dev = lustre_cfg_string(cfg, 0);
4710         int                     rc, name_size, uuid_size;
4711         char                   *name, *uuid, *p;
4712         struct lustre_cfg_bufs *bufs;
4713         struct lustre_cfg      *lcfg;
4714         struct obd_device      *obd;
4715         struct lustre_profile  *lprof;
4716         struct lu_site         *site;
4717         ENTRY;
4718
4719         /* in 1.8 we had the only device in the stack - MDS.
4720          * 2.0 introduces MDT, MDD, OSD; MDT starts others internally.
4721          * in 2.3 OSD is instantiated by obd_mount.c, so we need
4722          * to generate names and setup MDT, MDD. MDT will be using
4723          * generated name to connect to MDD. for MDD the next device
4724          * will be LOD with name taken from so called "profile" which
4725          * is generated by mount_option line
4726          *
4727          * 1.8 MGS generates config. commands like this:
4728          *   #06 (104)mount_option 0:  1:lustre-MDT0000  2:lustre-mdtlov
4729          *   #08 (120)setup   0:lustre-MDT0000  1:dev 2:type 3:lustre-MDT0000
4730          * 2.0 MGS generates config. commands like this:
4731          *   #07 (112)mount_option 0:  1:lustre-MDT0000  2:lustre-MDT0000-mdtlov
4732          *   #08 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4733          *                    3:lustre-MDT0000-mdtlov  4:f
4734          *
4735          * we generate MDD name from MDT one, just replacing T with D
4736          *
4737          * after all the preparations, the logical equivalent will be
4738          *   #01 (160)setup   0:lustre-MDD0000  1:lustre-MDD0000_UUID  2:0
4739          *                    3:lustre-MDT0000-mdtlov  4:f
4740          *   #02 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4741          *                    3:lustre-MDD0000  4:f
4742          *
4743          *  notice we build the stack from down to top: MDD first, then MDT */
4744
4745         name_size = MAX_OBD_NAME;
4746         uuid_size = MAX_OBD_NAME;
4747
4748         OBD_ALLOC(name, name_size);
4749         OBD_ALLOC(uuid, uuid_size);
4750         if (name == NULL || uuid == NULL)
4751                 GOTO(cleanup_mem, rc = -ENOMEM);
4752
4753         OBD_ALLOC_PTR(bufs);
4754         if (!bufs)
4755                 GOTO(cleanup_mem, rc = -ENOMEM);
4756
4757         strcpy(name, dev);
4758         p = strstr(name, "-MDT");
4759         if (p == NULL)
4760                 GOTO(cleanup_mem, rc = -ENOMEM);
4761         p[3] = 'D';
4762
4763         snprintf(uuid, MAX_OBD_NAME, "%s_UUID", name);
4764
4765         lprof = class_get_profile(lustre_cfg_string(cfg, 0));
4766         if (lprof == NULL || lprof->lp_dt == NULL) {
4767                 CERROR("can't find the profile: %s\n",
4768                        lustre_cfg_string(cfg, 0));
4769                 GOTO(cleanup_mem, rc = -EINVAL);
4770         }
4771
4772         lustre_cfg_bufs_reset(bufs, name);
4773         lustre_cfg_bufs_set_string(bufs, 1, LUSTRE_MDD_NAME);
4774         lustre_cfg_bufs_set_string(bufs, 2, uuid);
4775         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4776
4777         lcfg = lustre_cfg_new(LCFG_ATTACH, bufs);
4778         if (!lcfg)
4779                 GOTO(free_bufs, rc = -ENOMEM);
4780
4781         rc = class_attach(lcfg);
4782         if (rc)
4783                 GOTO(lcfg_cleanup, rc);
4784
4785         obd = class_name2obd(name);
4786         if (!obd) {
4787                 CERROR("Can not find obd %s (%s in config)\n",
4788                        MDD_OBD_NAME, lustre_cfg_string(cfg, 0));
4789                 GOTO(class_detach, rc = -EINVAL);
4790         }
4791
4792         lustre_cfg_free(lcfg);
4793
4794         lustre_cfg_bufs_reset(bufs, name);
4795         lustre_cfg_bufs_set_string(bufs, 1, uuid);
4796         lustre_cfg_bufs_set_string(bufs, 2, dev);
4797         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4798
4799         lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
4800
4801         rc = class_setup(obd, lcfg);
4802         if (rc)
4803                 GOTO(class_detach, rc);
4804
4805         /* connect to MDD we just setup */
4806         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_child_exp);
4807         if (rc)
4808                 RETURN(rc);
4809
4810         site = mdt->mdt_child_exp->exp_obd->obd_lu_dev->ld_site;
4811         LASSERT(site);
4812         LASSERT(mdt->mdt_md_dev.md_lu_dev.ld_site == NULL);
4813         mdt->mdt_md_dev.md_lu_dev.ld_site = site;
4814         site->ls_top_dev = &mdt->mdt_md_dev.md_lu_dev;
4815         mdt->mdt_child = lu2md_dev(mdt->mdt_child_exp->exp_obd->obd_lu_dev);
4816
4817
4818         /* now connect to bottom OSD */
4819         snprintf(name, MAX_OBD_NAME, "%s-osd", dev);
4820         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_bottom_exp);
4821         if (rc)
4822                 RETURN(rc);
4823         mdt->mdt_bottom =
4824                 lu2dt_dev(mdt->mdt_bottom_exp->exp_obd->obd_lu_dev);
4825
4826
4827         rc = lu_env_refill((struct lu_env *)env);
4828         if (rc != 0)
4829                 CERROR("Failure to refill session: '%d'\n", rc);
4830
4831         lu_dev_add_linkage(site, &mdt->mdt_md_dev.md_lu_dev);
4832
4833         EXIT;
4834 class_detach:
4835         if (rc)
4836                 class_detach(obd, lcfg);
4837 lcfg_cleanup:
4838         lustre_cfg_free(lcfg);
4839 free_bufs:
4840         OBD_FREE_PTR(bufs);
4841 cleanup_mem:
4842         if (name)
4843                 OBD_FREE(name, name_size);
4844         if (uuid)
4845                 OBD_FREE(uuid, uuid_size);
4846         RETURN(rc);
4847 }
4848
4849 /**
4850  * setup CONFIG_ORIG context, used to access local config log.
4851  * this may need to be rewrite as part of llog rewrite for lu-api.
4852  */
4853 static int mdt_obd_llog_setup(struct obd_device *obd,
4854                               struct lustre_sb_info *lsi)
4855 {
4856         int     rc;
4857
4858         LASSERT(obd->obd_fsops == NULL);
4859
4860         obd->obd_fsops = fsfilt_get_ops(lsi->lsi_fstype);
4861         if (IS_ERR(obd->obd_fsops))
4862                 return PTR_ERR(obd->obd_fsops);
4863
4864         rc = fsfilt_setup(obd, lsi->lsi_srv_mnt->mnt_sb);
4865         if (rc) {
4866                 fsfilt_put_ops(obd->obd_fsops);
4867                 return rc;
4868         }
4869
4870         OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
4871         obd->obd_lvfs_ctxt.pwdmnt = lsi->lsi_srv_mnt;
4872         obd->obd_lvfs_ctxt.pwd = lsi->lsi_srv_mnt->mnt_root;
4873         obd->obd_lvfs_ctxt.fs = get_ds();
4874
4875         rc = llog_setup(NULL, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT, obd,
4876                         &llog_lvfs_ops);
4877         if (rc) {
4878                 CERROR("llog_setup() failed: %d\n", rc);
4879                 fsfilt_put_ops(obd->obd_fsops);
4880         }
4881
4882         return rc;
4883 }
4884
4885 static void mdt_obd_llog_cleanup(struct obd_device *obd)
4886 {
4887         struct llog_ctxt *ctxt;
4888
4889         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
4890         if (ctxt)
4891                 llog_cleanup(NULL, ctxt);
4892
4893         if (obd->obd_fsops) {
4894                 fsfilt_put_ops(obd->obd_fsops);
4895                 obd->obd_fsops = NULL;
4896         }
4897 }
4898
4899 static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
4900 {
4901         struct md_device  *next = m->mdt_child;
4902         struct lu_device  *d    = &m->mdt_md_dev.md_lu_dev;
4903         struct obd_device *obd = mdt2obd_dev(m);
4904         ENTRY;
4905
4906         target_recovery_fini(obd);
4907
4908         ping_evictor_stop();
4909
4910         mdt_stop_ptlrpc_service(m);
4911         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
4912         mdt_obd_llog_cleanup(obd);
4913         obd_exports_barrier(obd);
4914         obd_zombie_barrier();
4915
4916         mdt_procfs_fini(m);
4917
4918         lut_fini(env, &m->mdt_lut);
4919         mdt_fs_cleanup(env, m);
4920         upcall_cache_cleanup(m->mdt_identity_cache);
4921         m->mdt_identity_cache = NULL;
4922
4923         if (m->mdt_namespace != NULL) {
4924                 ldlm_namespace_free(m->mdt_namespace, NULL,
4925                                     d->ld_obd->obd_force);
4926                 d->ld_obd->obd_namespace = m->mdt_namespace = NULL;
4927         }
4928
4929         cfs_free_nidlist(&m->mdt_nosquash_nids);
4930         if (m->mdt_nosquash_str) {
4931                 OBD_FREE(m->mdt_nosquash_str, m->mdt_nosquash_strlen);
4932                 m->mdt_nosquash_str = NULL;
4933                 m->mdt_nosquash_strlen = 0;
4934         }
4935
4936         mdt_seq_fini(env, m);
4937         mdt_seq_fini_cli(m);
4938         mdt_fld_fini(env, m);
4939         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4940
4941         next->md_ops->mdo_init_capa_ctxt(env, next, 0, 0, 0, NULL);
4942         cfs_timer_disarm(&m->mdt_ck_timer);
4943         mdt_ck_thread_stop(m);
4944
4945         /*
4946          * Finish the stack
4947          */
4948         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
4949
4950         LASSERT(cfs_atomic_read(&d->ld_ref) == 0);
4951
4952         server_put_mount(mdt2obd_dev(m)->obd_name, NULL);
4953
4954         EXIT;
4955 }
4956
4957 static int mdt_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
4958 {
4959         struct mdt_device       *m = mdt_dev(obd->obd_lu_dev);
4960         struct sptlrpc_rule_set  tmp_rset;
4961         int                      rc;
4962
4963         sptlrpc_rule_set_init(&tmp_rset);
4964         rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
4965         if (rc) {
4966                 CERROR("mdt %s: failed get sptlrpc rules: %d\n",
4967                        obd->obd_name, rc);
4968                 return rc;
4969         }
4970
4971         sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
4972
4973         cfs_write_lock(&m->mdt_sptlrpc_lock);
4974         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4975         m->mdt_sptlrpc_rset = tmp_rset;
4976         cfs_write_unlock(&m->mdt_sptlrpc_lock);
4977
4978         return 0;
4979 }
4980
4981 int mdt_postrecov(const struct lu_env *, struct mdt_device *);
4982
4983 static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
4984                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
4985 {
4986         struct mdt_thread_info    *info;
4987         struct obd_device         *obd;
4988         const char                *dev = lustre_cfg_string(cfg, 0);
4989         const char                *num = lustre_cfg_string(cfg, 2);
4990         struct lustre_mount_info  *lmi = NULL;
4991         struct lustre_sb_info     *lsi;
4992         struct lu_site            *s;
4993         struct md_site            *mite;
4994         const char                *identity_upcall = "NONE";
4995         struct md_device          *next;
4996         int                        rc;
4997         int                        node_id;
4998         mntopt_t                   mntopts;
4999         ENTRY;
5000
5001         md_device_init(&m->mdt_md_dev, ldt);
5002         /*
5003          * Environment (env) might be missing mdt_thread_key values at that
5004          * point, if device is allocated when mdt_thread_key is in QUIESCENT
5005          * mode.
5006          *
5007          * Usually device allocation path doesn't use module key values, but
5008          * mdt has to do a lot of work here, so allocate key value.
5009          */
5010         rc = lu_env_refill((struct lu_env *)env);
5011         if (rc != 0)
5012                 RETURN(rc);
5013
5014         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5015         LASSERT(info != NULL);
5016
5017         obd = class_name2obd(dev);
5018         LASSERT(obd != NULL);
5019
5020         m->mdt_max_mdsize = MAX_MD_SIZE; /* 4 stripes */
5021
5022         m->mdt_som_conf = 0;
5023
5024         m->mdt_opts.mo_cos = MDT_COS_DEFAULT;
5025         lmi = server_get_mount(dev);
5026         if (lmi == NULL) {
5027                 CERROR("Cannot get mount info for %s!\n", dev);
5028                 RETURN(-EFAULT);
5029         } else {
5030                 lsi = s2lsi(lmi->lmi_sb);
5031                 /* CMD is supported only in IAM mode */
5032                 LASSERT(num);
5033                 node_id = simple_strtol(num, NULL, 10);
5034                 if (!(lsi->lsi_flags & LDD_F_IAM_DIR) && node_id) {
5035                         CERROR("CMD Operation not allowed in IOP mode\n");
5036                         GOTO(err_lmi, rc = -EINVAL);
5037                 }
5038
5039                 obd->u.obt.obt_magic = OBT_MAGIC;
5040         }
5041
5042         cfs_rwlock_init(&m->mdt_sptlrpc_lock);
5043         sptlrpc_rule_set_init(&m->mdt_sptlrpc_rset);
5044
5045         cfs_spin_lock_init(&m->mdt_ioepoch_lock);
5046         m->mdt_opts.mo_compat_resname = 0;
5047         m->mdt_opts.mo_mds_capa = 1;
5048         m->mdt_opts.mo_oss_capa = 1;
5049         m->mdt_capa_timeout = CAPA_TIMEOUT;
5050         m->mdt_capa_alg = CAPA_HMAC_ALG_SHA1;
5051         m->mdt_ck_timeout = CAPA_KEY_TIMEOUT;
5052         m->mdt_squash_uid = 0;
5053         m->mdt_squash_gid = 0;
5054         CFS_INIT_LIST_HEAD(&m->mdt_nosquash_nids);
5055         m->mdt_nosquash_str = NULL;
5056         m->mdt_nosquash_strlen = 0;
5057         cfs_init_rwsem(&m->mdt_squash_sem);
5058         cfs_spin_lock_init(&m->mdt_osfs_lock);
5059         m->mdt_osfs_age = cfs_time_shift_64(-1000);
5060
5061         m->mdt_md_dev.md_lu_dev.ld_ops = &mdt_lu_ops;
5062         m->mdt_md_dev.md_lu_dev.ld_obd = obd;
5063         /* set this lu_device to obd, because error handling need it */
5064         obd->obd_lu_dev = &m->mdt_md_dev.md_lu_dev;
5065
5066         /* init the stack */
5067         rc = mdt_stack_init((struct lu_env *)env, m, cfg);
5068         if (rc) {
5069                 CERROR("Can't init device stack, rc %d\n", rc);
5070                 RETURN(rc);
5071         }
5072
5073         s = m->mdt_md_dev.md_lu_dev.ld_site;
5074         mite = &m->mdt_mite;
5075         s->ld_md_site = mite;
5076
5077         /* set server index */
5078         mite->ms_node_id = node_id;
5079
5080         /* failover is the default
5081          * FIXME: we do not failout mds0/mgs, which may cause some problems.
5082          * assumed whose ms_node_id == 0 XXX
5083          * */
5084         obd->obd_replayable = 1;
5085         /* No connection accepted until configurations will finish */
5086         obd->obd_no_conn = 1;
5087
5088         if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
5089                 char *str = lustre_cfg_string(cfg, 4);
5090                 if (strchr(str, 'n')) {
5091                         CWARN("%s: recovery disabled\n", obd->obd_name);
5092                         obd->obd_replayable = 0;
5093                 }
5094         }
5095
5096         rc = lut_init(env, &m->mdt_lut, obd, m->mdt_bottom);
5097         if (rc)
5098                 GOTO(err_fini_stack, rc);
5099
5100         snprintf(info->mti_u.ns_name, sizeof info->mti_u.ns_name,
5101                  LUSTRE_MDT_NAME"-%p", m);
5102         m->mdt_namespace = ldlm_namespace_new(obd, info->mti_u.ns_name,
5103                                               LDLM_NAMESPACE_SERVER,
5104                                               LDLM_NAMESPACE_GREEDY,
5105                                               LDLM_NS_TYPE_MDT);
5106         if (m->mdt_namespace == NULL)
5107                 GOTO(err_fini_seq, rc = -ENOMEM);
5108
5109         m->mdt_namespace->ns_lvbp = m;
5110         m->mdt_namespace->ns_lvbo = &mdt_lvbo;
5111
5112         ldlm_register_intent(m->mdt_namespace, mdt_intent_policy);
5113         /* set obd_namespace for compatibility with old code */
5114         obd->obd_namespace = m->mdt_namespace;
5115
5116         cfs_timer_init(&m->mdt_ck_timer, mdt_ck_timer_callback, m);
5117
5118         rc = mdt_ck_thread_start(m);
5119         if (rc)
5120                 GOTO(err_free_ns, rc);
5121
5122         rc = mdt_fs_setup(env, m, obd, lsi);
5123         if (rc)
5124                 GOTO(err_capa, rc);
5125
5126         rc = mdt_obd_llog_setup(obd, lsi);
5127         if (rc)
5128                 GOTO(err_fs_cleanup, rc);
5129
5130         mdt_adapt_sptlrpc_conf(obd, 1);
5131
5132         next = m->mdt_child;
5133
5134         rc = next->md_ops->mdo_iocontrol(env, next, OBD_IOC_GET_MNTOPT, 0,
5135                                          &mntopts);
5136         if (rc)
5137                 GOTO(err_llog_cleanup, rc);
5138
5139         if (mntopts & MNTOPT_USERXATTR)
5140                 m->mdt_opts.mo_user_xattr = 1;
5141         else
5142                 m->mdt_opts.mo_user_xattr = 0;
5143
5144         if (mntopts & MNTOPT_ACL)
5145                 m->mdt_opts.mo_acl = 1;
5146         else
5147                 m->mdt_opts.mo_acl = 0;
5148
5149         /* XXX: to support suppgid for ACL, we enable identity_upcall
5150          * by default, otherwise, maybe got unexpected -EACCESS. */
5151         if (m->mdt_opts.mo_acl)
5152                 identity_upcall = MDT_IDENTITY_UPCALL_PATH;
5153
5154         m->mdt_identity_cache = upcall_cache_init(obd->obd_name,identity_upcall,
5155                                                 &mdt_identity_upcall_cache_ops);
5156         if (IS_ERR(m->mdt_identity_cache)) {
5157                 rc = PTR_ERR(m->mdt_identity_cache);
5158                 m->mdt_identity_cache = NULL;
5159                 GOTO(err_llog_cleanup, rc);
5160         }
5161
5162         rc = mdt_procfs_init(m, dev);
5163         if (rc) {
5164                 CERROR("Can't init MDT lprocfs, rc %d\n", rc);
5165                 GOTO(err_recovery, rc);
5166         }
5167
5168         rc = mdt_start_ptlrpc_service(m);
5169         if (rc)
5170                 GOTO(err_procfs, rc);
5171
5172         ping_evictor_start();
5173
5174         /* recovery will be started upon mdt_prepare()
5175          * when the whole stack is complete and ready
5176          * to serve the requests */
5177
5178         mdt_init_capa_ctxt(env, m);
5179
5180         /* Reduce the initial timeout on an MDS because it doesn't need such
5181          * a long timeout as an OST does. Adaptive timeouts will adjust this
5182          * value appropriately. */
5183         if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
5184                 ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
5185
5186         RETURN(0);
5187
5188         ping_evictor_stop();
5189         mdt_stop_ptlrpc_service(m);
5190 err_procfs:
5191         mdt_procfs_fini(m);
5192 err_recovery:
5193         target_recovery_fini(obd);
5194         upcall_cache_cleanup(m->mdt_identity_cache);
5195         m->mdt_identity_cache = NULL;
5196 err_llog_cleanup:
5197         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
5198         mdt_obd_llog_cleanup(obd);
5199 err_fs_cleanup:
5200         mdt_fs_cleanup(env, m);
5201 err_capa:
5202         cfs_timer_disarm(&m->mdt_ck_timer);
5203         mdt_ck_thread_stop(m);
5204 err_free_ns:
5205         ldlm_namespace_free(m->mdt_namespace, NULL, 0);
5206         obd->obd_namespace = m->mdt_namespace = NULL;
5207 err_fini_seq:
5208         mdt_seq_fini(env, m);
5209         mdt_fld_fini(env, m);
5210         lut_fini(env, &m->mdt_lut);
5211 err_fini_stack:
5212         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
5213 err_lmi:
5214         if (lmi)
5215                 server_put_mount(dev, lmi->lmi_mnt);
5216         return (rc);
5217 }
5218
5219 /* For interoperability between 1.8 and 2.0. */
5220 static struct cfg_interop_param mdt_interop_param[] = {
5221         { "mdt.group_upcall",   NULL },
5222         { "mdt.quota_type",     "mdd.quota_type" },
5223         { "mdt.rootsquash",     "mdt.root_squash" },
5224         { "mdt.nosquash_nid",   "mdt.nosquash_nids" },
5225         { NULL }
5226 };
5227
5228 /* used by MGS to process specific configurations */
5229 static int mdt_process_config(const struct lu_env *env,
5230                               struct lu_device *d, struct lustre_cfg *cfg)
5231 {
5232         struct mdt_device *m = mdt_dev(d);
5233         struct md_device *md_next = m->mdt_child;
5234         struct lu_device *next = md2lu_dev(md_next);
5235         int rc = 0;
5236         ENTRY;
5237
5238         switch (cfg->lcfg_command) {
5239         case LCFG_PARAM: {
5240                 struct lprocfs_static_vars  lvars;
5241                 struct obd_device          *obd = d->ld_obd;
5242
5243                 /* For interoperability between 1.8 and 2.0. */
5244                 struct cfg_interop_param   *ptr = NULL;
5245                 struct lustre_cfg          *old_cfg = NULL;
5246                 char                       *param = NULL;
5247
5248                 param = lustre_cfg_string(cfg, 1);
5249                 if (param == NULL) {
5250                         CERROR("param is empty\n");
5251                         rc = -EINVAL;
5252                         break;
5253                 }
5254
5255                 ptr = class_find_old_param(param, mdt_interop_param);
5256                 if (ptr != NULL) {
5257                         if (ptr->new_param == NULL) {
5258                                 CWARN("For 1.8 interoperability, skip this %s."
5259                                       " It is obsolete.\n", ptr->old_param);
5260                                         break;
5261                         }
5262
5263                         CWARN("Found old param %s, changed it to %s.\n",
5264                               ptr->old_param, ptr->new_param);
5265
5266                         old_cfg = cfg;
5267                         cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
5268                         if (IS_ERR(cfg)) {
5269                                 rc = PTR_ERR(cfg);
5270                                 break;
5271                         }
5272                 }
5273
5274                 lprocfs_mdt_init_vars(&lvars);
5275                 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars,
5276                                               cfg, obd);
5277                 if (rc > 0 || rc == -ENOSYS)
5278                         /* we don't understand; pass it on */
5279                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
5280
5281                 if (old_cfg != NULL)
5282                         lustre_cfg_free(cfg);
5283
5284                 break;
5285         }
5286         case LCFG_ADD_MDC:
5287                 /*
5288                  * Add mdc hook to get first MDT uuid and connect it to
5289                  * ls->controller to use for seq manager.
5290                  */
5291                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5292                 if (rc)
5293                         CERROR("Can't add mdc, rc %d\n", rc);
5294                 else
5295                         rc = mdt_seq_init_cli(env, mdt_dev(d), cfg);
5296                 break;
5297         default:
5298                 /* others are passed further */
5299                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5300                 break;
5301         }
5302         RETURN(rc);
5303 }
5304
5305 static struct lu_object *mdt_object_alloc(const struct lu_env *env,
5306                                           const struct lu_object_header *hdr,
5307                                           struct lu_device *d)
5308 {
5309         struct mdt_object *mo;
5310
5311         ENTRY;
5312
5313         OBD_SLAB_ALLOC_PTR_GFP(mo, mdt_object_kmem, CFS_ALLOC_IO);
5314         if (mo != NULL) {
5315                 struct lu_object *o;
5316                 struct lu_object_header *h;
5317
5318                 o = &mo->mot_obj.mo_lu;
5319                 h = &mo->mot_header;
5320                 lu_object_header_init(h);
5321                 lu_object_init(o, h, d);
5322                 lu_object_add_top(h, o);
5323                 o->lo_ops = &mdt_obj_ops;
5324                 cfs_mutex_init(&mo->mot_ioepoch_mutex);
5325                 cfs_mutex_init(&mo->mot_lov_mutex);
5326                 RETURN(o);
5327         } else
5328                 RETURN(NULL);
5329 }
5330
5331 static int mdt_object_init(const struct lu_env *env, struct lu_object *o,
5332                            const struct lu_object_conf *unused)
5333 {
5334         struct mdt_device *d = mdt_dev(o->lo_dev);
5335         struct lu_device  *under;
5336         struct lu_object  *below;
5337         int                rc = 0;
5338         ENTRY;
5339
5340         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
5341                PFID(lu_object_fid(o)));
5342
5343         under = &d->mdt_child->md_lu_dev;
5344         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
5345         if (below != NULL) {
5346                 lu_object_add(o, below);
5347         } else
5348                 rc = -ENOMEM;
5349
5350         RETURN(rc);
5351 }
5352
5353 static void mdt_object_free(const struct lu_env *env, struct lu_object *o)
5354 {
5355         struct mdt_object *mo = mdt_obj(o);
5356         struct lu_object_header *h;
5357         ENTRY;
5358
5359         h = o->lo_header;
5360         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
5361                PFID(lu_object_fid(o)));
5362
5363         lu_object_fini(o);
5364         lu_object_header_fini(h);
5365         OBD_SLAB_FREE_PTR(mo, mdt_object_kmem);
5366
5367         EXIT;
5368 }
5369
5370 static int mdt_object_print(const struct lu_env *env, void *cookie,
5371                             lu_printer_t p, const struct lu_object *o)
5372 {
5373         struct mdt_object *mdto = mdt_obj((struct lu_object *)o);
5374         return (*p)(env, cookie, LUSTRE_MDT_NAME"-object@%p(ioepoch="LPU64" "
5375                     "flags="LPX64", epochcount=%d, writecount=%d)",
5376                     mdto, mdto->mot_ioepoch, mdto->mot_flags,
5377                     mdto->mot_ioepoch_count, mdto->mot_writecount);
5378 }
5379
5380 static int mdt_prepare(const struct lu_env *env,
5381                 struct lu_device *pdev,
5382                 struct lu_device *cdev)
5383 {
5384         struct mdt_device *mdt = mdt_dev(cdev);
5385         struct lu_device *next = &mdt->mdt_child->md_lu_dev;
5386         struct obd_device *obd = cdev->ld_obd;
5387         int rc;
5388
5389         ENTRY;
5390
5391         LASSERT(obd);
5392
5393         rc = next->ld_ops->ldo_prepare(env, cdev, next);
5394         if (rc)
5395                 RETURN(rc);
5396
5397         rc = mdt_llog_ctxt_clone(env, mdt, LLOG_CHANGELOG_ORIG_CTXT);
5398         if (rc)
5399                 RETURN(rc);
5400
5401         rc = mdt_fld_init(env, obd->obd_name, mdt);
5402         if (rc)
5403                 RETURN(rc);
5404
5405         rc = mdt_seq_init(env, obd->obd_name, mdt);
5406         if (rc)
5407                 RETURN(rc);
5408
5409         rc = mdt->mdt_child->md_ops->mdo_root_get(env, mdt->mdt_child,
5410                                                   &mdt->mdt_md_root_fid);
5411         if (rc)
5412                 RETURN(rc);
5413
5414         LASSERT(!cfs_test_bit(MDT_FL_CFGLOG, &mdt->mdt_state));
5415         target_recovery_init(&mdt->mdt_lut, mdt_recovery_handle);
5416         cfs_set_bit(MDT_FL_CFGLOG, &mdt->mdt_state);
5417         LASSERT(obd->obd_no_conn);
5418         cfs_spin_lock(&obd->obd_dev_lock);
5419         obd->obd_no_conn = 0;
5420         cfs_spin_unlock(&obd->obd_dev_lock);
5421
5422         if (obd->obd_recovering == 0)
5423                 mdt_postrecov(env, mdt);
5424
5425         RETURN(rc);
5426 }
5427
5428 static const struct lu_device_operations mdt_lu_ops = {
5429         .ldo_object_alloc   = mdt_object_alloc,
5430         .ldo_process_config = mdt_process_config,
5431         .ldo_prepare        = mdt_prepare,
5432 };
5433
5434 static const struct lu_object_operations mdt_obj_ops = {
5435         .loo_object_init    = mdt_object_init,
5436         .loo_object_free    = mdt_object_free,
5437         .loo_object_print   = mdt_object_print
5438 };
5439
5440 static int mdt_obd_set_info_async(const struct lu_env *env,
5441                                   struct obd_export *exp,
5442                                   __u32 keylen, void *key,
5443                                   __u32 vallen, void *val,
5444                                   struct ptlrpc_request_set *set)
5445 {
5446         struct obd_device     *obd = exp->exp_obd;
5447         int                    rc;
5448         ENTRY;
5449
5450         LASSERT(obd);
5451
5452         if (KEY_IS(KEY_SPTLRPC_CONF)) {
5453                 rc = mdt_adapt_sptlrpc_conf(obd, 0);
5454                 RETURN(rc);
5455         }
5456
5457         RETURN(0);
5458 }
5459
5460 /* mds_connect_internal */
5461 static int mdt_connect_internal(struct obd_export *exp,
5462                                 struct mdt_device *mdt,
5463                                 struct obd_connect_data *data)
5464 {
5465         if (data != NULL) {
5466                 data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
5467                 data->ocd_ibits_known &= MDS_INODELOCK_FULL;
5468
5469                 /* If no known bits (which should not happen, probably,
5470                    as everybody should support LOOKUP and UPDATE bits at least)
5471                    revert to compat mode with plain locks. */
5472                 if (!data->ocd_ibits_known &&
5473                     data->ocd_connect_flags & OBD_CONNECT_IBITS)
5474                         data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
5475
5476                 if (!mdt->mdt_opts.mo_acl)
5477                         data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
5478
5479                 if (!mdt->mdt_opts.mo_user_xattr)
5480                         data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
5481
5482                 if (!mdt->mdt_som_conf)
5483                         data->ocd_connect_flags &= ~OBD_CONNECT_SOM;
5484
5485                 if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
5486                         data->ocd_brw_size = min(data->ocd_brw_size,
5487                                (__u32)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
5488                         if (data->ocd_brw_size == 0) {
5489                                 CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
5490                                        " ocd_version: %x ocd_grant: %d "
5491                                        "ocd_index: %u ocd_brw_size is "
5492                                        "unexpectedly zero, network data "
5493                                        "corruption? Refusing connection of this"
5494                                        " client\n",
5495                                        exp->exp_obd->obd_name,
5496                                        exp->exp_client_uuid.uuid,
5497                                        exp, data->ocd_connect_flags, data->ocd_version,
5498                                        data->ocd_grant, data->ocd_index);
5499                                 return -EPROTO;
5500                         }
5501                 }
5502
5503                 cfs_spin_lock(&exp->exp_lock);
5504                 exp->exp_connect_flags = data->ocd_connect_flags;
5505                 cfs_spin_unlock(&exp->exp_lock);
5506                 data->ocd_version = LUSTRE_VERSION_CODE;
5507                 exp->exp_mdt_data.med_ibits_known = data->ocd_ibits_known;
5508         }
5509
5510 #if 0
5511         if (mdt->mdt_opts.mo_acl &&
5512             ((exp->exp_connect_flags & OBD_CONNECT_ACL) == 0)) {
5513                 CWARN("%s: MDS requires ACL support but client does not\n",
5514                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5515                 return -EBADE;
5516         }
5517 #endif
5518
5519         if ((exp->exp_connect_flags & OBD_CONNECT_FID) == 0) {
5520                 CWARN("%s: MDS requires FID support, but client not\n",
5521                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5522                 return -EBADE;
5523         }
5524
5525         if (mdt->mdt_som_conf && !exp_connect_som(exp) &&
5526             !(exp->exp_connect_flags & OBD_CONNECT_MDS_MDS)) {
5527                 CWARN("%s: MDS has SOM enabled, but client does not support "
5528                       "it\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5529                 return -EBADE;
5530         }
5531
5532         return 0;
5533 }
5534
5535 static int mdt_connect_check_sptlrpc(struct mdt_device *mdt,
5536                                      struct obd_export *exp,
5537                                      struct ptlrpc_request *req)
5538 {
5539         struct sptlrpc_flavor   flvr;
5540         int                     rc = 0;
5541
5542         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
5543                 cfs_read_lock(&mdt->mdt_sptlrpc_lock);
5544                 sptlrpc_target_choose_flavor(&mdt->mdt_sptlrpc_rset,
5545                                              req->rq_sp_from,
5546                                              req->rq_peer.nid,
5547                                              &flvr);
5548                 cfs_read_unlock(&mdt->mdt_sptlrpc_lock);
5549
5550                 cfs_spin_lock(&exp->exp_lock);
5551
5552                 exp->exp_sp_peer = req->rq_sp_from;
5553                 exp->exp_flvr = flvr;
5554
5555                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
5556                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
5557                         CERROR("unauthorized rpc flavor %x from %s, "
5558                                "expect %x\n", req->rq_flvr.sf_rpc,
5559                                libcfs_nid2str(req->rq_peer.nid),
5560                                exp->exp_flvr.sf_rpc);
5561                         rc = -EACCES;
5562                 }
5563
5564                 cfs_spin_unlock(&exp->exp_lock);
5565         } else {
5566                 if (exp->exp_sp_peer != req->rq_sp_from) {
5567                         CERROR("RPC source %s doesn't match %s\n",
5568                                sptlrpc_part2name(req->rq_sp_from),
5569                                sptlrpc_part2name(exp->exp_sp_peer));
5570                         rc = -EACCES;
5571                 } else {
5572                         rc = sptlrpc_target_export_check(exp, req);
5573                 }
5574         }
5575
5576         return rc;
5577 }
5578
5579 /* mds_connect copy */
5580 static int mdt_obd_connect(const struct lu_env *env,
5581                            struct obd_export **exp, struct obd_device *obd,
5582                            struct obd_uuid *cluuid,
5583                            struct obd_connect_data *data,
5584                            void *localdata)
5585 {
5586         struct mdt_thread_info *info;
5587         struct obd_export      *lexp;
5588         struct lustre_handle    conn = { 0 };
5589         struct mdt_device      *mdt;
5590         struct ptlrpc_request  *req;
5591         int                     rc;
5592         ENTRY;
5593
5594         LASSERT(env != NULL);
5595         if (!exp || !obd || !cluuid)
5596                 RETURN(-EINVAL);
5597
5598         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5599         req = info->mti_pill->rc_req;
5600         mdt = mdt_dev(obd->obd_lu_dev);
5601
5602         /*
5603          * first, check whether the stack is ready to handle requests
5604          * XXX: probably not very appropriate method is used now
5605          *      at some point we should find a better one
5606          */
5607         if (!cfs_test_bit(MDT_FL_SYNCED, &mdt->mdt_state)) {
5608                 rc = obd_health_check(env, mdt->mdt_child_exp->exp_obd);
5609                 if (rc)
5610                         RETURN(-EAGAIN);
5611                 cfs_set_bit(MDT_FL_SYNCED, &mdt->mdt_state);
5612         }
5613
5614         rc = class_connect(&conn, obd, cluuid);
5615         if (rc)
5616                 RETURN(rc);
5617
5618         lexp = class_conn2export(&conn);
5619         LASSERT(lexp != NULL);
5620
5621         rc = mdt_connect_check_sptlrpc(mdt, lexp, req);
5622         if (rc)
5623                 GOTO(out, rc);
5624
5625         if (OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
5626                 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
5627
5628         rc = mdt_connect_internal(lexp, mdt, data);
5629         if (rc == 0) {
5630                 struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
5631
5632                 LASSERT(lcd);
5633                 info->mti_exp = lexp;
5634                 memcpy(lcd->lcd_uuid, cluuid, sizeof lcd->lcd_uuid);
5635                 rc = lut_client_new(env, lexp);
5636                 if (rc == 0)
5637                         mdt_export_stats_init(obd, lexp, localdata);
5638         }
5639
5640 out:
5641         if (rc != 0) {
5642                 class_disconnect(lexp);
5643                 *exp = NULL;
5644         } else {
5645                 *exp = lexp;
5646         }
5647
5648         RETURN(rc);
5649 }
5650
5651 static int mdt_obd_reconnect(const struct lu_env *env,
5652                              struct obd_export *exp, struct obd_device *obd,
5653                              struct obd_uuid *cluuid,
5654                              struct obd_connect_data *data,
5655                              void *localdata)
5656 {
5657         struct mdt_thread_info *info;
5658         struct mdt_device      *mdt;
5659         struct ptlrpc_request  *req;
5660         int                     rc;
5661         ENTRY;
5662
5663         if (exp == NULL || obd == NULL || cluuid == NULL)
5664                 RETURN(-EINVAL);
5665
5666         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5667         req = info->mti_pill->rc_req;
5668         mdt = mdt_dev(obd->obd_lu_dev);
5669
5670         rc = mdt_connect_check_sptlrpc(mdt, exp, req);
5671         if (rc)
5672                 RETURN(rc);
5673
5674         rc = mdt_connect_internal(exp, mdt_dev(obd->obd_lu_dev), data);
5675         if (rc == 0)
5676                 mdt_export_stats_init(obd, exp, localdata);
5677
5678         RETURN(rc);
5679 }
5680
5681 static int mdt_export_cleanup(struct obd_export *exp)
5682 {
5683         struct mdt_export_data *med = &exp->exp_mdt_data;
5684         struct obd_device      *obd = exp->exp_obd;
5685         struct mdt_device      *mdt;
5686         struct mdt_thread_info *info;
5687         struct lu_env           env;
5688         CFS_LIST_HEAD(closing_list);
5689         struct mdt_file_data *mfd, *n;
5690         int rc = 0;
5691         ENTRY;
5692
5693         cfs_spin_lock(&med->med_open_lock);
5694         while (!cfs_list_empty(&med->med_open_head)) {
5695                 cfs_list_t *tmp = med->med_open_head.next;
5696                 mfd = cfs_list_entry(tmp, struct mdt_file_data, mfd_list);
5697
5698                 /* Remove mfd handle so it can't be found again.
5699                  * We are consuming the mfd_list reference here. */
5700                 class_handle_unhash(&mfd->mfd_handle);
5701                 cfs_list_move_tail(&mfd->mfd_list, &closing_list);
5702         }
5703         cfs_spin_unlock(&med->med_open_lock);
5704         mdt = mdt_dev(obd->obd_lu_dev);
5705         LASSERT(mdt != NULL);
5706
5707         rc = lu_env_init(&env, LCT_MD_THREAD);
5708         if (rc)
5709                 RETURN(rc);
5710
5711         info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
5712         LASSERT(info != NULL);
5713         memset(info, 0, sizeof *info);
5714         info->mti_env = &env;
5715         info->mti_mdt = mdt;
5716         info->mti_exp = exp;
5717
5718         if (!cfs_list_empty(&closing_list)) {
5719                 struct md_attr *ma = &info->mti_attr;
5720
5721                 /* Close any open files (which may also cause orphan unlinking). */
5722                 cfs_list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
5723                         cfs_list_del_init(&mfd->mfd_list);
5724                         ma->ma_need = ma->ma_valid = 0;
5725                         /* Don't unlink orphan on failover umount, LU-184 */
5726                         if (exp->exp_flags & OBD_OPT_FAILOVER) {
5727                                 ma->ma_valid = MA_FLAGS;
5728                                 ma->ma_attr_flags |= MDS_KEEP_ORPHAN;
5729                         }
5730                         mdt_mfd_close(info, mfd);
5731                 }
5732         }
5733         info->mti_mdt = NULL;
5734         /* cleanup client slot early */
5735         /* Do not erase record for recoverable client. */
5736         if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
5737                 lut_client_del(&env, exp);
5738         lu_env_fini(&env);
5739
5740         RETURN(rc);
5741 }
5742
5743 static int mdt_obd_disconnect(struct obd_export *exp)
5744 {
5745         int rc;
5746         ENTRY;
5747
5748         LASSERT(exp);
5749         class_export_get(exp);
5750
5751         rc = server_disconnect_export(exp);
5752         if (rc != 0)
5753                 CDEBUG(D_IOCTL, "server disconnect error: %d\n", rc);
5754
5755         rc = mdt_export_cleanup(exp);
5756         class_export_put(exp);
5757         RETURN(rc);
5758 }
5759
5760 /* FIXME: Can we avoid using these two interfaces? */
5761 static int mdt_init_export(struct obd_export *exp)
5762 {
5763         struct mdt_export_data *med = &exp->exp_mdt_data;
5764         int                     rc;
5765         ENTRY;
5766
5767         CFS_INIT_LIST_HEAD(&med->med_open_head);
5768         cfs_spin_lock_init(&med->med_open_lock);
5769         cfs_mutex_init(&med->med_idmap_mutex);
5770         med->med_idmap = NULL;
5771         cfs_spin_lock(&exp->exp_lock);
5772         exp->exp_connecting = 1;
5773         cfs_spin_unlock(&exp->exp_lock);
5774
5775         /* self-export doesn't need client data and ldlm initialization */
5776         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5777                                      &exp->exp_client_uuid)))
5778                 RETURN(0);
5779
5780         rc = lut_client_alloc(exp);
5781         if (rc)
5782                 GOTO(err, rc);
5783
5784         rc = ldlm_init_export(exp);
5785         if (rc)
5786                 GOTO(err_free, rc);
5787
5788         RETURN(rc);
5789
5790 err_free:
5791         lut_client_free(exp);
5792 err:
5793         CERROR("%s: Failed to initialize export: rc = %d\n",
5794                exp->exp_obd->obd_name, rc);
5795         return rc;
5796 }
5797
5798 static int mdt_destroy_export(struct obd_export *exp)
5799 {
5800         ENTRY;
5801
5802         if (exp_connect_rmtclient(exp))
5803                 mdt_cleanup_idmap(&exp->exp_mdt_data);
5804
5805         target_destroy_export(exp);
5806         /* destroy can be called from failed obd_setup, so
5807          * checking uuid is safer than obd_self_export */
5808         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5809                                      &exp->exp_client_uuid)))
5810                 RETURN(0);
5811
5812         ldlm_destroy_export(exp);
5813         lut_client_free(exp);
5814
5815         LASSERT(cfs_list_empty(&exp->exp_outstanding_replies));
5816         LASSERT(cfs_list_empty(&exp->exp_mdt_data.med_open_head));
5817
5818         RETURN(0);
5819 }
5820
5821 static int mdt_rpc_fid2path(struct mdt_thread_info *info, void *key,
5822                             void *val, int vallen)
5823 {
5824         struct mdt_device *mdt = mdt_dev(info->mti_exp->exp_obd->obd_lu_dev);
5825         struct getinfo_fid2path *fpout, *fpin;
5826         int rc = 0;
5827
5828         fpin = key + cfs_size_round(sizeof(KEY_FID2PATH));
5829         fpout = val;
5830
5831         if (ptlrpc_req_need_swab(info->mti_pill->rc_req))
5832                 lustre_swab_fid2path(fpin);
5833
5834         memcpy(fpout, fpin, sizeof(*fpin));
5835         if (fpout->gf_pathlen != vallen - sizeof(*fpin))
5836                 RETURN(-EINVAL);
5837
5838         rc = mdt_fid2path(info->mti_env, mdt, fpout);
5839         RETURN(rc);
5840 }
5841
5842 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
5843                         struct getinfo_fid2path *fp)
5844 {
5845         struct mdt_object *obj;
5846         int    rc;
5847         ENTRY;
5848
5849         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
5850                PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
5851
5852         if (!fid_is_sane(&fp->gf_fid))
5853                 RETURN(-EINVAL);
5854
5855         obj = mdt_object_find(env, mdt, &fp->gf_fid);
5856         if (obj == NULL || IS_ERR(obj)) {
5857                 CDEBUG(D_IOCTL, "no object "DFID": %ld\n", PFID(&fp->gf_fid),
5858                        PTR_ERR(obj));
5859                 RETURN(-EINVAL);
5860         }
5861
5862         rc = lu_object_exists(&obj->mot_obj.mo_lu);
5863         if (rc <= 0) {
5864                 if (rc == -1)
5865                         rc = -EREMOTE;
5866                 else
5867                         rc = -ENOENT;
5868                 mdt_object_put(env, obj);
5869                 CDEBUG(D_IOCTL, "nonlocal object "DFID": %d\n",
5870                        PFID(&fp->gf_fid), rc);
5871                 RETURN(rc);
5872         }
5873
5874         rc = mo_path(env, md_object_next(&obj->mot_obj), fp->gf_path,
5875                      fp->gf_pathlen, &fp->gf_recno, &fp->gf_linkno);
5876         mdt_object_put(env, obj);
5877
5878         RETURN(rc);
5879 }
5880
5881 static int mdt_get_info(struct mdt_thread_info *info)
5882 {
5883         struct ptlrpc_request *req = mdt_info_req(info);
5884         char *key;
5885         int keylen;
5886         __u32 *vallen;
5887         void *valout;
5888         int rc;
5889         ENTRY;
5890
5891         key = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_KEY);
5892         if (key == NULL) {
5893                 CDEBUG(D_IOCTL, "No GETINFO key");
5894                 RETURN(-EFAULT);
5895         }
5896         keylen = req_capsule_get_size(info->mti_pill, &RMF_GETINFO_KEY,
5897                                       RCL_CLIENT);
5898
5899         vallen = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_VALLEN);
5900         if (vallen == NULL) {
5901                 CDEBUG(D_IOCTL, "Unable to get RMF_GETINFO_VALLEN buffer");
5902                 RETURN(-EFAULT);
5903         }
5904
5905         req_capsule_set_size(info->mti_pill, &RMF_GETINFO_VAL, RCL_SERVER,
5906                              *vallen);
5907         rc = req_capsule_server_pack(info->mti_pill);
5908         valout = req_capsule_server_get(info->mti_pill, &RMF_GETINFO_VAL);
5909         if (valout == NULL) {
5910                 CDEBUG(D_IOCTL, "Unable to get get-info RPC out buffer");
5911                 RETURN(-EFAULT);
5912         }
5913
5914         if (KEY_IS(KEY_FID2PATH))
5915                 rc = mdt_rpc_fid2path(info, key, valout, *vallen);
5916         else
5917                 rc = -EINVAL;
5918
5919         lustre_msg_set_status(req->rq_repmsg, rc);
5920
5921         RETURN(rc);
5922 }
5923
5924 /* Pass the ioc down */
5925 static int mdt_ioc_child(struct lu_env *env, struct mdt_device *mdt,
5926                          unsigned int cmd, int len, void *data)
5927 {
5928         struct lu_context ioctl_session;
5929         struct md_device *next = mdt->mdt_child;
5930         int rc;
5931         ENTRY;
5932
5933         rc = lu_context_init(&ioctl_session, LCT_SESSION);
5934         if (rc)
5935                 RETURN(rc);
5936         ioctl_session.lc_thread = (struct ptlrpc_thread *)cfs_current();
5937         lu_context_enter(&ioctl_session);
5938         env->le_ses = &ioctl_session;
5939
5940         LASSERT(next->md_ops->mdo_iocontrol);
5941         rc = next->md_ops->mdo_iocontrol(env, next, cmd, len, data);
5942
5943         lu_context_exit(&ioctl_session);
5944         lu_context_fini(&ioctl_session);
5945         RETURN(rc);
5946 }
5947
5948 static int mdt_ioc_version_get(struct mdt_thread_info *mti, void *karg)
5949 {
5950         struct obd_ioctl_data *data = karg;
5951         struct lu_fid *fid = (struct lu_fid *)data->ioc_inlbuf1;
5952         __u64 version;
5953         struct mdt_object *obj;
5954         struct mdt_lock_handle  *lh;
5955         int rc;
5956         ENTRY;
5957
5958         CDEBUG(D_IOCTL, "getting version for "DFID"\n", PFID(fid));
5959         if (!fid_is_sane(fid))
5960                 RETURN(-EINVAL);
5961
5962         lh = &mti->mti_lh[MDT_LH_PARENT];
5963         mdt_lock_reg_init(lh, LCK_CR);
5964
5965         obj = mdt_object_find_lock(mti, fid, lh, MDS_INODELOCK_UPDATE);
5966         if (IS_ERR(obj))
5967                 RETURN(PTR_ERR(obj));
5968
5969         rc = mdt_object_exists(obj);
5970         if (rc < 0) {
5971                 rc = -EREMOTE;
5972                 /**
5973                  * before calling version get the correct MDS should be
5974                  * fid, this is error to find remote object here
5975                  */
5976                 CERROR("nonlocal object "DFID"\n", PFID(fid));
5977         } else if (rc == 0) {
5978                 *(__u64 *)data->ioc_inlbuf2 = ENOENT_VERSION;
5979                 rc = -ENOENT;
5980         } else {
5981                 version = dt_version_get(mti->mti_env, mdt_obj2dt(obj));
5982                *(__u64 *)data->ioc_inlbuf2 = version;
5983                 rc = 0;
5984         }
5985         mdt_object_unlock_put(mti, obj, lh, 1);
5986         RETURN(rc);
5987 }
5988
5989 /* ioctls on obd dev */
5990 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
5991                          void *karg, void *uarg)
5992 {
5993         struct lu_env      env;
5994         struct obd_device *obd = exp->exp_obd;
5995         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
5996         struct dt_device  *dt = mdt->mdt_bottom;
5997         int rc;
5998
5999         ENTRY;
6000         CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
6001         rc = lu_env_init(&env, LCT_MD_THREAD);
6002         if (rc)
6003                 RETURN(rc);
6004
6005         switch (cmd) {
6006         case OBD_IOC_SYNC:
6007                 rc = mdt_device_sync(&env, mdt);
6008                 break;
6009         case OBD_IOC_SET_READONLY:
6010                 rc = dt->dd_ops->dt_ro(&env, dt);
6011                 break;
6012         case OBD_IOC_ABORT_RECOVERY:
6013                 CERROR("Aborting recovery for device %s\n", obd->obd_name);
6014                 target_stop_recovery_thread(obd);
6015                 rc = 0;
6016                 break;
6017         case OBD_IOC_CHANGELOG_REG:
6018         case OBD_IOC_CHANGELOG_DEREG:
6019         case OBD_IOC_CHANGELOG_CLEAR:
6020                 rc = mdt_ioc_child(&env, mdt, cmd, len, karg);
6021                 break;
6022         case OBD_IOC_START_LFSCK:
6023         case OBD_IOC_STOP_LFSCK: {
6024                 struct md_device *next = mdt->mdt_child;
6025                 struct obd_ioctl_data *data = karg;
6026
6027                 if (unlikely(data == NULL)) {
6028                         rc = -EINVAL;
6029                         break;
6030                 }
6031
6032                 rc = next->md_ops->mdo_iocontrol(&env, next, cmd,
6033                                                  data->ioc_inllen1,
6034                                                  data->ioc_inlbuf1);
6035                 break;
6036         }
6037         case OBD_IOC_GET_OBJ_VERSION: {
6038                 struct mdt_thread_info *mti;
6039                 mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
6040                 memset(mti, 0, sizeof *mti);
6041                 mti->mti_env = &env;
6042                 mti->mti_mdt = mdt;
6043                 mti->mti_exp = exp;
6044
6045                 rc = mdt_ioc_version_get(mti, karg);
6046                 break;
6047         }
6048         default:
6049                 CERROR("Not supported cmd = %d for device %s\n",
6050                        cmd, obd->obd_name);
6051                 rc = -EOPNOTSUPP;
6052         }
6053
6054         lu_env_fini(&env);
6055         RETURN(rc);
6056 }
6057
6058 int mdt_postrecov(const struct lu_env *env, struct mdt_device *mdt)
6059 {
6060         struct lu_device *ld = md2lu_dev(mdt->mdt_child);
6061         int rc;
6062         ENTRY;
6063
6064         rc = ld->ld_ops->ldo_recovery_complete(env, ld);
6065         RETURN(rc);
6066 }
6067
6068 int mdt_obd_postrecov(struct obd_device *obd)
6069 {
6070         struct lu_env env;
6071         int rc;
6072
6073         rc = lu_env_init(&env, LCT_MD_THREAD);
6074         if (rc)
6075                 RETURN(rc);
6076         rc = mdt_postrecov(&env, mdt_dev(obd->obd_lu_dev));
6077         lu_env_fini(&env);
6078         return rc;
6079 }
6080
6081 /**
6082  * Send a copytool req to a client
6083  * Note this sends a request RPC from a server (MDT) to a client (MDC),
6084  * backwards of normal comms.
6085  */
6086 int mdt_hsm_copytool_send(struct obd_export *exp)
6087 {
6088         struct kuc_hdr *lh;
6089         struct hsm_action_list *hal;
6090         struct hsm_action_item *hai;
6091         int rc, len;
6092         ENTRY;
6093
6094         CWARN("%s: writing to mdc at %s\n", exp->exp_obd->obd_name,
6095               libcfs_nid2str(exp->exp_connection->c_peer.nid));
6096
6097         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
6098                 /* for mockup below */ 2 * cfs_size_round(sizeof(*hai));
6099         OBD_ALLOC(lh, len);
6100         if (lh == NULL)
6101                 RETURN(-ENOMEM);
6102
6103         lh->kuc_magic = KUC_MAGIC;
6104         lh->kuc_transport = KUC_TRANSPORT_HSM;
6105         lh->kuc_msgtype = HMT_ACTION_LIST;
6106         lh->kuc_msglen = len;
6107
6108         hal = (struct hsm_action_list *)(lh + 1);
6109         hal->hal_version = HAL_VERSION;
6110         hal->hal_archive_num = 1;
6111         obd_uuid2fsname(hal->hal_fsname, exp->exp_obd->obd_name,
6112                         MTI_NAME_MAXLEN);
6113
6114         /* mock up an action list */
6115         hal->hal_count = 2;
6116         hai = hai_zero(hal);
6117         hai->hai_action = HSMA_ARCHIVE;
6118         hai->hai_fid.f_oid = 0xA00A;
6119         hai->hai_len = sizeof(*hai);
6120         hai = hai_next(hai);
6121         hai->hai_action = HSMA_RESTORE;
6122         hai->hai_fid.f_oid = 0xB00B;
6123         hai->hai_len = sizeof(*hai);
6124
6125         /* Uses the ldlm reverse import; this rpc will be seen by
6126           the ldlm_callback_handler */
6127         rc = do_set_info_async(exp->exp_imp_reverse,
6128                                LDLM_SET_INFO, LUSTRE_OBD_VERSION,
6129                                sizeof(KEY_HSM_COPYTOOL_SEND),
6130                                KEY_HSM_COPYTOOL_SEND,
6131                                len, lh, NULL);
6132
6133         OBD_FREE(lh, len);
6134
6135         RETURN(rc);
6136 }
6137
6138 static struct obd_ops mdt_obd_device_ops = {
6139         .o_owner          = THIS_MODULE,
6140         .o_set_info_async = mdt_obd_set_info_async,
6141         .o_connect        = mdt_obd_connect,
6142         .o_reconnect      = mdt_obd_reconnect,
6143         .o_disconnect     = mdt_obd_disconnect,
6144         .o_init_export    = mdt_init_export,
6145         .o_destroy_export = mdt_destroy_export,
6146         .o_iocontrol      = mdt_iocontrol,
6147         .o_postrecov      = mdt_obd_postrecov,
6148 };
6149
6150 static struct lu_device* mdt_device_fini(const struct lu_env *env,
6151                                          struct lu_device *d)
6152 {
6153         struct mdt_device *m = mdt_dev(d);
6154         ENTRY;
6155
6156         mdt_fini(env, m);
6157         RETURN(NULL);
6158 }
6159
6160 static struct lu_device *mdt_device_free(const struct lu_env *env,
6161                                          struct lu_device *d)
6162 {
6163         struct mdt_device *m = mdt_dev(d);
6164         ENTRY;
6165
6166         md_device_fini(&m->mdt_md_dev);
6167         OBD_FREE_PTR(m);
6168         RETURN(NULL);
6169 }
6170
6171 static struct lu_device *mdt_device_alloc(const struct lu_env *env,
6172                                           struct lu_device_type *t,
6173                                           struct lustre_cfg *cfg)
6174 {
6175         struct lu_device  *l;
6176         struct mdt_device *m;
6177
6178         OBD_ALLOC_PTR(m);
6179         if (m != NULL) {
6180                 int rc;
6181
6182                 l = &m->mdt_md_dev.md_lu_dev;
6183                 rc = mdt_init0(env, m, t, cfg);
6184                 if (rc != 0) {
6185                         mdt_device_free(env, l);
6186                         l = ERR_PTR(rc);
6187                         return l;
6188                 }
6189         } else
6190                 l = ERR_PTR(-ENOMEM);
6191         return l;
6192 }
6193
6194 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
6195 LU_KEY_INIT(mdt, struct mdt_thread_info);
6196
6197 static void mdt_key_fini(const struct lu_context *ctx,
6198                          struct lu_context_key *key, void* data)
6199 {
6200         struct mdt_thread_info *info = data;
6201
6202         if (info->mti_big_lmm) {
6203                 OBD_FREE_LARGE(info->mti_big_lmm, info->mti_big_lmmsize);
6204                 info->mti_big_lmm = NULL;
6205                 info->mti_big_lmmsize = 0;
6206         }
6207         OBD_FREE_PTR(info);
6208 }
6209
6210 /* context key: mdt_thread_key */
6211 LU_CONTEXT_KEY_DEFINE(mdt, LCT_MD_THREAD);
6212
6213 struct md_ucred *mdt_ucred(const struct mdt_thread_info *info)
6214 {
6215         return md_ucred(info->mti_env);
6216 }
6217
6218 /**
6219  * Enable/disable COS (Commit On Sharing).
6220  *
6221  * Set/Clear the COS flag in mdt options.
6222  *
6223  * \param mdt mdt device
6224  * \param val 0 disables COS, other values enable COS
6225  */
6226 void mdt_enable_cos(struct mdt_device *mdt, int val)
6227 {
6228         struct lu_env env;
6229         int rc;
6230
6231         mdt->mdt_opts.mo_cos = !!val;
6232         rc = lu_env_init(&env, LCT_LOCAL);
6233         if (unlikely(rc != 0)) {
6234                 CWARN("lu_env initialization failed with rc = %d,"
6235                       "cannot sync\n", rc);
6236                 return;
6237         }
6238         mdt_device_sync(&env, mdt);
6239         lu_env_fini(&env);
6240 }
6241
6242 /**
6243  * Check COS (Commit On Sharing) status.
6244  *
6245  * Return COS flag status.
6246  *
6247  * \param mdt mdt device
6248  */
6249 int mdt_cos_is_enabled(struct mdt_device *mdt)
6250 {
6251         return mdt->mdt_opts.mo_cos != 0;
6252 }
6253
6254 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
6255 LU_TYPE_INIT_FINI(mdt, &mdt_thread_key);
6256
6257 static struct lu_device_type_operations mdt_device_type_ops = {
6258         .ldto_init = mdt_type_init,
6259         .ldto_fini = mdt_type_fini,
6260
6261         .ldto_start = mdt_type_start,
6262         .ldto_stop  = mdt_type_stop,
6263
6264         .ldto_device_alloc = mdt_device_alloc,
6265         .ldto_device_free  = mdt_device_free,
6266         .ldto_device_fini  = mdt_device_fini
6267 };
6268
6269 static struct lu_device_type mdt_device_type = {
6270         .ldt_tags     = LU_DEVICE_MD,
6271         .ldt_name     = LUSTRE_MDT_NAME,
6272         .ldt_ops      = &mdt_device_type_ops,
6273         .ldt_ctx_tags = LCT_MD_THREAD
6274 };
6275
6276 static int __init mdt_mod_init(void)
6277 {
6278         struct lprocfs_static_vars lvars;
6279         int rc;
6280
6281         rc = lu_kmem_init(mdt_caches);
6282         if (rc)
6283                 return rc;
6284
6285         if (mdt_num_threads != 0 && mds_num_threads == 0) {
6286                 LCONSOLE_INFO("mdt_num_threads module parameter is deprecated,"
6287                               "use mds_num_threads instead or unset both for"
6288                               "dynamic thread startup\n");
6289                 mds_num_threads = mdt_num_threads;
6290         }
6291
6292         lprocfs_mdt_init_vars(&lvars);
6293         rc = class_register_type(&mdt_obd_device_ops, NULL,
6294                                  lvars.module_vars, LUSTRE_MDT_NAME,
6295                                  &mdt_device_type);
6296
6297         if (rc)
6298                 lu_kmem_fini(mdt_caches);
6299         return rc;
6300 }
6301
6302 static void __exit mdt_mod_exit(void)
6303 {
6304         class_unregister_type(LUSTRE_MDT_NAME);
6305         lu_kmem_fini(mdt_caches);
6306 }
6307
6308
6309 #define DEF_HNDL(prefix, base, suffix, flags, opc, fn, fmt)             \
6310 [prefix ## _ ## opc - prefix ## _ ## base] = {                          \
6311         .mh_name    = #opc,                                             \
6312         .mh_fail_id = OBD_FAIL_ ## prefix ## _  ## opc ## suffix,       \
6313         .mh_opc     = prefix ## _  ## opc,                              \
6314         .mh_flags   = flags,                                            \
6315         .mh_act     = fn,                                               \
6316         .mh_fmt     = fmt                                               \
6317 }
6318
6319 #define DEF_MDT_HNDL(flags, name, fn, fmt)                                  \
6320         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, fmt)
6321
6322 #define DEF_SEQ_HNDL(flags, name, fn, fmt)                      \
6323         DEF_HNDL(SEQ, QUERY, _NET, flags, name, fn, fmt)
6324
6325 #define DEF_FLD_HNDL(flags, name, fn, fmt)                      \
6326         DEF_HNDL(FLD, QUERY, _NET, flags, name, fn, fmt)
6327 /*
6328  * Request with a format known in advance
6329  */
6330 #define DEF_MDT_HNDL_F(flags, name, fn)                                 \
6331         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, &RQF_MDS_ ## name)
6332
6333 #define DEF_SEQ_HNDL_F(flags, name, fn)                                 \
6334         DEF_HNDL(SEQ, QUERY, _NET, flags, name, fn, &RQF_SEQ_ ## name)
6335
6336 #define DEF_FLD_HNDL_F(flags, name, fn)                                 \
6337         DEF_HNDL(FLD, QUERY, _NET, flags, name, fn, &RQF_FLD_ ## name)
6338 /*
6339  * Request with a format we do not yet know
6340  */
6341 #define DEF_MDT_HNDL_0(flags, name, fn)                                 \
6342         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, NULL)
6343
6344 static struct mdt_handler mdt_mds_ops[] = {
6345 DEF_MDT_HNDL_F(0,                         CONNECT,      mdt_connect),
6346 DEF_MDT_HNDL_F(0,                         DISCONNECT,   mdt_disconnect),
6347 DEF_MDT_HNDL  (0,                         SET_INFO,     mdt_set_info,
6348                                                              &RQF_OBD_SET_INFO),
6349 DEF_MDT_HNDL_F(0,                         GET_INFO,     mdt_get_info),
6350 DEF_MDT_HNDL_F(0           |HABEO_REFERO, GETSTATUS,    mdt_getstatus),
6351 DEF_MDT_HNDL_F(HABEO_CORPUS,              GETATTR,      mdt_getattr),
6352 DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, GETATTR_NAME, mdt_getattr_name),
6353 DEF_MDT_HNDL_F(HABEO_CORPUS,              GETXATTR,     mdt_getxattr),
6354 DEF_MDT_HNDL_F(0           |HABEO_REFERO, STATFS,       mdt_statfs),
6355 DEF_MDT_HNDL_F(0           |MUTABOR,      REINT,        mdt_reint),
6356 DEF_MDT_HNDL_F(HABEO_CORPUS,              CLOSE,        mdt_close),
6357 DEF_MDT_HNDL_F(HABEO_CORPUS,              DONE_WRITING, mdt_done_writing),
6358 DEF_MDT_HNDL_F(0           |HABEO_REFERO, PIN,          mdt_pin),
6359 DEF_MDT_HNDL_0(0,                         SYNC,         mdt_sync),
6360 DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, IS_SUBDIR,    mdt_is_subdir),
6361 DEF_MDT_HNDL_F(0,                         QUOTACHECK,   mdt_quotacheck),
6362 DEF_MDT_HNDL_F(0,                         QUOTACTL,     mdt_quotactl)
6363 };
6364
6365 #define DEF_OBD_HNDL(flags, name, fn)                   \
6366         DEF_HNDL(OBD, PING, _NET, flags, name, fn, NULL)
6367
6368
6369 static struct mdt_handler mdt_obd_ops[] = {
6370         DEF_OBD_HNDL(0, PING,           mdt_obd_ping),
6371         DEF_OBD_HNDL(0, LOG_CANCEL,     mdt_obd_log_cancel),
6372         DEF_OBD_HNDL(0, QC_CALLBACK,    mdt_obd_qc_callback),
6373         DEF_OBD_HNDL(0, IDX_READ,       mdt_obd_idx_read)
6374 };
6375
6376 #define DEF_DLM_HNDL_0(flags, name, fn)                   \
6377         DEF_HNDL(LDLM, ENQUEUE, , flags, name, fn, NULL)
6378 #define DEF_DLM_HNDL_F(flags, name, fn)                   \
6379         DEF_HNDL(LDLM, ENQUEUE, , flags, name, fn, &RQF_LDLM_ ## name)
6380
6381 static struct mdt_handler mdt_dlm_ops[] = {
6382         DEF_DLM_HNDL_F(HABEO_CLAVIS, ENQUEUE,        mdt_enqueue),
6383         DEF_DLM_HNDL_0(HABEO_CLAVIS, CONVERT,        mdt_convert),
6384         DEF_DLM_HNDL_0(0,            BL_CALLBACK,    mdt_bl_callback),
6385         DEF_DLM_HNDL_0(0,            CP_CALLBACK,    mdt_cp_callback)
6386 };
6387
6388 #define DEF_LLOG_HNDL(flags, name, fn)                   \
6389         DEF_HNDL(LLOG, ORIGIN_HANDLE_CREATE, _NET, flags, name, fn, NULL)
6390
6391 static struct mdt_handler mdt_llog_ops[] = {
6392         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_CREATE,      mdt_llog_create),
6393         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_NEXT_BLOCK,  mdt_llog_next_block),
6394         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_READ_HEADER, mdt_llog_read_header),
6395         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_WRITE_REC,   NULL),
6396         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_CLOSE,       NULL),
6397         DEF_LLOG_HNDL(0, ORIGIN_CONNECT,            NULL),
6398         DEF_LLOG_HNDL(0, CATINFO,                   NULL),
6399         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_PREV_BLOCK,  mdt_llog_prev_block),
6400         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_DESTROY,     mdt_llog_destroy),
6401 };
6402
6403 #define DEF_SEC_CTX_HNDL(name, fn)                      \
6404         DEF_HNDL(SEC_CTX, INIT, _NET, 0, name, fn, NULL)
6405
6406 static struct mdt_handler mdt_sec_ctx_ops[] = {
6407         DEF_SEC_CTX_HNDL(INIT,          mdt_sec_ctx_handle),
6408         DEF_SEC_CTX_HNDL(INIT_CONT,     mdt_sec_ctx_handle),
6409         DEF_SEC_CTX_HNDL(FINI,          mdt_sec_ctx_handle)
6410 };
6411
6412 static struct mdt_opc_slice mdt_regular_handlers[] = {
6413         {
6414                 .mos_opc_start = MDS_GETATTR,
6415                 .mos_opc_end   = MDS_LAST_OPC,
6416                 .mos_hs        = mdt_mds_ops
6417         },
6418         {
6419                 .mos_opc_start = OBD_PING,
6420                 .mos_opc_end   = OBD_LAST_OPC,
6421                 .mos_hs        = mdt_obd_ops
6422         },
6423         {
6424                 .mos_opc_start = LDLM_ENQUEUE,
6425                 .mos_opc_end   = LDLM_LAST_OPC,
6426                 .mos_hs        = mdt_dlm_ops
6427         },
6428         {
6429                 .mos_opc_start = LLOG_ORIGIN_HANDLE_CREATE,
6430                 .mos_opc_end   = LLOG_LAST_OPC,
6431                 .mos_hs        = mdt_llog_ops
6432         },
6433         {
6434                 .mos_opc_start = SEC_CTX_INIT,
6435                 .mos_opc_end   = SEC_LAST_OPC,
6436                 .mos_hs        = mdt_sec_ctx_ops
6437         },
6438         {
6439                 .mos_hs        = NULL
6440         }
6441 };
6442
6443 static struct mdt_handler mdt_readpage_ops[] = {
6444         DEF_MDT_HNDL_F(0,                         CONNECT,  mdt_connect),
6445         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, READPAGE, mdt_readpage),
6446 #ifdef HAVE_SPLIT_SUPPORT
6447         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, WRITEPAGE, mdt_writepage),
6448 #endif
6449
6450         /*
6451          * XXX: this is ugly and should be fixed one day, see mdc_close() for
6452          * detailed comments. --umka
6453          */
6454         DEF_MDT_HNDL_F(HABEO_CORPUS,              CLOSE,    mdt_close),
6455         DEF_MDT_HNDL_F(HABEO_CORPUS,              DONE_WRITING,    mdt_done_writing),
6456 };
6457
6458 static struct mdt_opc_slice mdt_readpage_handlers[] = {
6459         {
6460                 .mos_opc_start = MDS_GETATTR,
6461                 .mos_opc_end   = MDS_LAST_OPC,
6462                 .mos_hs        = mdt_readpage_ops
6463         },
6464         {
6465                 .mos_opc_start = OBD_FIRST_OPC,
6466                 .mos_opc_end   = OBD_LAST_OPC,
6467                 .mos_hs        = mdt_obd_ops
6468         },
6469         {
6470                 .mos_hs        = NULL
6471         }
6472 };
6473
6474 static struct mdt_handler mdt_xmds_ops[] = {
6475         DEF_MDT_HNDL_F(0,                         CONNECT,      mdt_connect),
6476         DEF_MDT_HNDL_F(HABEO_CORPUS             , GETATTR,      mdt_getattr),
6477         DEF_MDT_HNDL_F(0 | MUTABOR              , REINT,        mdt_reint),
6478         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, IS_SUBDIR,    mdt_is_subdir),
6479 };
6480
6481 static struct mdt_opc_slice mdt_xmds_handlers[] = {
6482         {
6483                 .mos_opc_start = MDS_GETATTR,
6484                 .mos_opc_end   = MDS_LAST_OPC,
6485                 .mos_hs        = mdt_xmds_ops
6486         },
6487         {
6488                 .mos_opc_start = OBD_PING,
6489                 .mos_opc_end   = OBD_LAST_OPC,
6490                 .mos_hs        = mdt_obd_ops
6491         },
6492         {
6493                 .mos_opc_start = SEC_CTX_INIT,
6494                 .mos_opc_end   = SEC_LAST_OPC,
6495                 .mos_hs        = mdt_sec_ctx_ops
6496         },
6497         {
6498                 .mos_hs        = NULL
6499         }
6500 };
6501
6502 static struct mdt_handler mdt_seq_ops[] = {
6503         DEF_SEQ_HNDL_F(0, QUERY, (int (*)(struct mdt_thread_info *))seq_query)
6504 };
6505
6506 static struct mdt_opc_slice mdt_seq_handlers[] = {
6507         {
6508                 .mos_opc_start = SEQ_QUERY,
6509                 .mos_opc_end   = SEQ_LAST_OPC,
6510                 .mos_hs        = mdt_seq_ops
6511         },
6512         {
6513                 .mos_hs        = NULL
6514         }
6515 };
6516
6517 static struct mdt_handler mdt_fld_ops[] = {
6518         DEF_FLD_HNDL_F(0, QUERY, (int (*)(struct mdt_thread_info *))fld_query)
6519 };
6520
6521 static struct mdt_opc_slice mdt_fld_handlers[] = {
6522         {
6523                 .mos_opc_start = FLD_QUERY,
6524                 .mos_opc_end   = FLD_LAST_OPC,
6525                 .mos_hs        = mdt_fld_ops
6526         },
6527         {
6528                 .mos_hs        = NULL
6529         }
6530 };
6531
6532 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6533 MODULE_DESCRIPTION("Lustre Meta-data Target ("LUSTRE_MDT_NAME")");
6534 MODULE_LICENSE("GPL");
6535
6536 cfs_module(mdt, "0.2.0", mdt_mod_init, mdt_mod_exit);