lustre/mdt/mdt_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mdt/mdt_handler.c
  37  *
  38  * Lustre Metadata Target (mdt) request handler
  39  *
  40  * Author: Peter Braam <braam@clusterfs.com>
  41  * Author: Andreas Dilger <adilger@clusterfs.com>
  42  * Author: Phil Schwan <phil@clusterfs.com>
  43  * Author: Mike Shaver <shaver@clusterfs.com>
  44  * Author: Nikita Danilov <nikita@clusterfs.com>
  45  * Author: Huang Hua <huanghua@clusterfs.com>
  46  * Author: Yury Umanets <umka@clusterfs.com>
  47  */
  48
  49 #define DEBUG_SUBSYSTEM S_MDS
  50
  51 #include <linux/module.h>
  52 /*
  53  * struct OBD_{ALLOC,FREE}*()
  54  */
  55 #include <obd_support.h>
  56 /* struct ptlrpc_request */
  57 #include <lustre_net.h>
  58 /* struct obd_export */
  59 #include <lustre_export.h>
  60 /* struct obd_device */
  61 #include <obd.h>
  62 /* lu2dt_dev() */
  63 #include <dt_object.h>
  64 #include <lustre_mds.h>
  65 #include <lustre_mdt.h>
  66 #include <lustre_log.h>
  67 #include "mdt_internal.h"
  68 #include <lustre_acl.h>
  69 #include <lustre_param.h>
  70 #include <lustre_quota.h>
  71
  72 mdl_mode_t mdt_mdl_lock_modes[] = {
  73         [LCK_MINMODE] = MDL_MINMODE,
  74         [LCK_EX]      = MDL_EX,
  75         [LCK_PW]      = MDL_PW,
  76         [LCK_PR]      = MDL_PR,
  77         [LCK_CW]      = MDL_CW,
  78         [LCK_CR]      = MDL_CR,
  79         [LCK_NL]      = MDL_NL,
  80         [LCK_GROUP]   = MDL_GROUP
  81 };
  82
  83 ldlm_mode_t mdt_dlm_lock_modes[] = {
  84         [MDL_MINMODE] = LCK_MINMODE,
  85         [MDL_EX]      = LCK_EX,
  86         [MDL_PW]      = LCK_PW,
  87         [MDL_PR]      = LCK_PR,
  88         [MDL_CW]      = LCK_CW,
  89         [MDL_CR]      = LCK_CR,
  90         [MDL_NL]      = LCK_NL,
  91         [MDL_GROUP]   = LCK_GROUP
  92 };
  93
  94 /*
  95  * Initialized in mdt_mod_init().
  96  */
  97 static unsigned long mdt_num_threads;
  98 CFS_MODULE_PARM(mdt_num_threads, "ul", ulong, 0444,
  99                 "number of MDS service threads to start "
 100                 "(deprecated in favor of mds_num_threads)");
 101
 102 static unsigned long mds_num_threads;
 103 CFS_MODULE_PARM(mds_num_threads, "ul", ulong, 0444,
 104                 "number of MDS service threads to start");
 105
 106 static char *mds_num_cpts;
 107 CFS_MODULE_PARM(mds_num_cpts, "c", charp, 0444,
 108                 "CPU partitions MDS threads should run on");
 109
 110 static unsigned long mds_rdpg_num_threads;
 111 CFS_MODULE_PARM(mds_rdpg_num_threads, "ul", ulong, 0444,
 112                 "number of MDS readpage service threads to start");
 113
 114 static char *mds_rdpg_num_cpts;
 115 CFS_MODULE_PARM(mds_rdpg_num_cpts, "c", charp, 0444,
 116                 "CPU partitions MDS readpage threads should run on");
 117
 118 /* NB: these two should be removed along with setattr service in the future */
 119 static unsigned long mds_attr_num_threads;
 120 CFS_MODULE_PARM(mds_attr_num_threads, "ul", ulong, 0444,
 121                 "number of MDS setattr service threads to start");
 122
 123 static char *mds_attr_num_cpts;
 124 CFS_MODULE_PARM(mds_attr_num_cpts, "c", charp, 0444,
 125                 "CPU partitions MDS setattr threads should run on");
 126
 127 /* ptlrpc request handler for MDT. All handlers are
 128  * grouped into several slices - struct mdt_opc_slice,
 129  * and stored in an array - mdt_handlers[].
 130  */
 131 struct mdt_handler {
 132         /* The name of this handler. */
 133         const char *mh_name;
 134         /* Fail id for this handler, checked at the beginning of this handler*/
 135         int         mh_fail_id;
 136         /* Operation code for this handler */
 137         __u32       mh_opc;
 138         /* flags are listed in enum mdt_handler_flags below. */
 139         __u32       mh_flags;
 140         /* The actual handler function to execute. */
 141         int (*mh_act)(struct mdt_thread_info *info);
 142         /* Request format for this request. */
 143         const struct req_format *mh_fmt;
 144 };
 145
 146 enum mdt_handler_flags {
 147         /*
 148          * struct mdt_body is passed in the incoming message, and object
 149          * identified by this fid exists on disk.
 150          *
 151          * "habeo corpus" == "I have a body"
 152          */
 153         HABEO_CORPUS = (1 << 0),
 154         /*
 155          * struct ldlm_request is passed in the incoming message.
 156          *
 157          * "habeo clavis" == "I have a key"
 158          */
 159         HABEO_CLAVIS = (1 << 1),
 160         /*
 161          * this request has fixed reply format, so that reply message can be
 162          * packed by generic code.
 163          *
 164          * "habeo refero" == "I have a reply"
 165          */
 166         HABEO_REFERO = (1 << 2),
 167         /*
 168          * this request will modify something, so check whether the filesystem
 169          * is readonly or not, then return -EROFS to client asap if necessary.
 170          *
 171          * "mutabor" == "I shall modify"
 172          */
 173         MUTABOR      = (1 << 3)
 174 };
 175
 176 struct mdt_opc_slice {
 177         __u32               mos_opc_start;
 178         int                 mos_opc_end;
 179         struct mdt_handler *mos_hs;
 180 };
 181
 182 static struct mdt_opc_slice mdt_regular_handlers[];
 183 static struct mdt_opc_slice mdt_readpage_handlers[];
 184 static struct mdt_opc_slice mdt_xmds_handlers[];
 185 static struct mdt_opc_slice mdt_seq_handlers[];
 186 static struct mdt_opc_slice mdt_fld_handlers[];
 187
 188 static struct mdt_device *mdt_dev(struct lu_device *d);
 189 static int mdt_regular_handle(struct ptlrpc_request *req);
 190 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags);
 191 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
 192                         struct getinfo_fid2path *fp);
 193
 194 static const struct lu_object_operations mdt_obj_ops;
 195
 196 /* Slab for MDT object allocation */
 197 static cfs_mem_cache_t *mdt_object_kmem;
 198
 199 static struct lu_kmem_descr mdt_caches[] = {
 200         {
 201                 .ckd_cache = &mdt_object_kmem,
 202                 .ckd_name  = "mdt_obj",
 203                 .ckd_size  = sizeof(struct mdt_object)
 204         },
 205         {
 206                 .ckd_cache = NULL
 207         }
 208 };
 209
 210 int mdt_get_disposition(struct ldlm_reply *rep, int flag)
 211 {
 212         if (!rep)
 213                 return 0;
 214         return (rep->lock_policy_res1 & flag);
 215 }
 216
 217 void mdt_clear_disposition(struct mdt_thread_info *info,
 218                            struct ldlm_reply *rep, int flag)
 219 {
 220         if (info)
 221                 info->mti_opdata &= ~flag;
 222         if (rep)
 223                 rep->lock_policy_res1 &= ~flag;
 224 }
 225
 226 void mdt_set_disposition(struct mdt_thread_info *info,
 227                          struct ldlm_reply *rep, int flag)
 228 {
 229         if (info)
 230                 info->mti_opdata |= flag;
 231         if (rep)
 232                 rep->lock_policy_res1 |= flag;
 233 }
 234
 235 void mdt_lock_reg_init(struct mdt_lock_handle *lh, ldlm_mode_t lm)
 236 {
 237         lh->mlh_pdo_hash = 0;
 238         lh->mlh_reg_mode = lm;
 239         lh->mlh_type = MDT_REG_LOCK;
 240 }
 241
 242 void mdt_lock_pdo_init(struct mdt_lock_handle *lh, ldlm_mode_t lm,
 243                        const char *name, int namelen)
 244 {
 245         lh->mlh_reg_mode = lm;
 246         lh->mlh_type = MDT_PDO_LOCK;
 247
 248         if (name != NULL && (name[0] != '\0')) {
 249                 LASSERT(namelen > 0);
 250                 lh->mlh_pdo_hash = full_name_hash(name, namelen);
 251         } else {
 252                 LASSERT(namelen == 0);
 253                 lh->mlh_pdo_hash = 0ull;
 254         }
 255 }
 256
 257 static void mdt_lock_pdo_mode(struct mdt_thread_info *info, struct mdt_object *o,
 258                               struct mdt_lock_handle *lh)
 259 {
 260         mdl_mode_t mode;
 261         ENTRY;
 262
 263         /*
 264          * Any dir access needs couple of locks:
 265          *
 266          * 1) on part of dir we gonna take lookup/modify;
 267          *
 268          * 2) on whole dir to protect it from concurrent splitting and/or to
 269          * flush client's cache for readdir().
 270          *
 271          * so, for a given mode and object this routine decides what lock mode
 272          * to use for lock #2:
 273          *
 274          * 1) if caller's gonna lookup in dir then we need to protect dir from
 275          * being splitted only - LCK_CR
 276          *
 277          * 2) if caller's gonna modify dir then we need to protect dir from
 278          * being splitted and to flush cache - LCK_CW
 279          *
 280          * 3) if caller's gonna modify dir and that dir seems ready for
 281          * splitting then we need to protect it from any type of access
 282          * (lookup/modify/split) - LCK_EX --bzzz
 283          */
 284
 285         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
 286         LASSERT(lh->mlh_pdo_mode == LCK_MINMODE);
 287
 288         /*
 289          * Ask underlaying level its opinion about preferable PDO lock mode
 290          * having access type passed as regular lock mode:
 291          *
 292          * - MDL_MINMODE means that lower layer does not want to specify lock
 293          * mode;
 294          *
 295          * - MDL_NL means that no PDO lock should be taken. This is used in some
 296          * cases. Say, for non-splittable directories no need to use PDO locks
 297          * at all.
 298          */
 299         mode = mdo_lock_mode(info->mti_env, mdt_object_child(o),
 300                              mdt_dlm_mode2mdl_mode(lh->mlh_reg_mode));
 301
 302         if (mode != MDL_MINMODE) {
 303                 lh->mlh_pdo_mode = mdt_mdl_mode2dlm_mode(mode);
 304         } else {
 305                 /*
 306                  * Lower layer does not want to specify locking mode. We do it
 307                  * our selves. No special protection is needed, just flush
 308                  * client's cache on modification and allow concurrent
 309                  * mondification.
 310                  */
 311                 switch (lh->mlh_reg_mode) {
 312                 case LCK_EX:
 313                         lh->mlh_pdo_mode = LCK_EX;
 314                         break;
 315                 case LCK_PR:
 316                         lh->mlh_pdo_mode = LCK_CR;
 317                         break;
 318                 case LCK_PW:
 319                         lh->mlh_pdo_mode = LCK_CW;
 320                         break;
 321                 default:
 322                         CERROR("Not expected lock type (0x%x)\n",
 323                                (int)lh->mlh_reg_mode);
 324                         LBUG();
 325                 }
 326         }
 327
 328         LASSERT(lh->mlh_pdo_mode != LCK_MINMODE);
 329         EXIT;
 330 }
 331
 332 static int mdt_getstatus(struct mdt_thread_info *info)
 333 {
 334         struct mdt_device *mdt  = info->mti_mdt;
 335         struct md_device  *next = mdt->mdt_child;
 336         struct mdt_body   *repbody;
 337         int                rc;
 338
 339         ENTRY;
 340
 341         rc = mdt_check_ucred(info);
 342         if (rc)
 343                 RETURN(err_serious(rc));
 344
 345         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK))
 346                 RETURN(err_serious(-ENOMEM));
 347
 348         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 349         rc = next->md_ops->mdo_root_get(info->mti_env, next, &repbody->fid1);
 350         if (rc != 0)
 351                 RETURN(rc);
 352
 353         repbody->valid |= OBD_MD_FLID;
 354
 355         if (mdt->mdt_opts.mo_mds_capa &&
 356             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 357                 struct mdt_object  *root;
 358                 struct lustre_capa *capa;
 359
 360                 root = mdt_object_find(info->mti_env, mdt, &repbody->fid1);
 361                 if (IS_ERR(root))
 362                         RETURN(PTR_ERR(root));
 363
 364                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
 365                 LASSERT(capa);
 366                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 367                 rc = mo_capa_get(info->mti_env, mdt_object_child(root), capa,
 368                                  0);
 369                 mdt_object_put(info->mti_env, root);
 370                 if (rc == 0)
 371                         repbody->valid |= OBD_MD_FLMDSCAPA;
 372         }
 373
 374         RETURN(rc);
 375 }
 376
 377 static int mdt_statfs(struct mdt_thread_info *info)
 378 {
 379         struct ptlrpc_request           *req = mdt_info_req(info);
 380         struct md_device                *next = info->mti_mdt->mdt_child;
 381         struct ptlrpc_service_part      *svcpt;
 382         struct obd_statfs               *osfs;
 383         int                             rc;
 384
 385         ENTRY;
 386
 387         svcpt = info->mti_pill->rc_req->rq_rqbd->rqbd_svcpt;
 388
 389         /* This will trigger a watchdog timeout */
 390         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
 391                          (MDT_SERVICE_WATCHDOG_FACTOR *
 392                           at_get(&svcpt->scp_at_estimate)) + 1);
 393
 394         rc = mdt_check_ucred(info);
 395         if (rc)
 396                 RETURN(err_serious(rc));
 397
 398         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
 399                 RETURN(err_serious(-ENOMEM));
 400
 401         osfs = req_capsule_server_get(info->mti_pill, &RMF_OBD_STATFS);
 402         if (!osfs)
 403                 RETURN(-EPROTO);
 404
 405         /** statfs information are cached in the mdt_device */
 406         if (cfs_time_before_64(info->mti_mdt->mdt_osfs_age,
 407                                cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS))) {
 408                 /** statfs data is too old, get up-to-date one */
 409                 rc = next->md_ops->mdo_statfs(info->mti_env, next, osfs);
 410                 if (rc)
 411                         RETURN(rc);
 412                 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                 spin_unlock(&info->mti_mdt->mdt_osfs_lock);
 416         } else {
 417                 /** use cached statfs data */
 418                 spin_lock(&info->mti_mdt->mdt_osfs_lock);
 419                 *osfs = info->mti_mdt->mdt_osfs;
 420                 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_xattr_get(struct mdt_thread_info *info, struct mdt_object *o,
 546                              char *name)
 547 {
 548         const struct lu_env *env = info->mti_env;
 549         int rc;
 550         ENTRY;
 551
 552         LASSERT(info->mti_big_lmm_used == 0);
 553         rc = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL, name);
 554         if (rc < 0)
 555                 RETURN(rc);
 556
 557         /* big_lmm may need to be grown */
 558         if (info->mti_big_lmmsize < rc) {
 559                 int size = size_roundup_power2(rc);
 560
 561                 if (info->mti_big_lmmsize > 0) {
 562                         /* free old buffer */
 563                         LASSERT(info->mti_big_lmm);
 564                         OBD_FREE_LARGE(info->mti_big_lmm,
 565                                        info->mti_big_lmmsize);
 566                         info->mti_big_lmm = NULL;
 567                         info->mti_big_lmmsize = 0;
 568                 }
 569
 570                 OBD_ALLOC_LARGE(info->mti_big_lmm, size);
 571                 if (info->mti_big_lmm == NULL)
 572                         RETURN(-ENOMEM);
 573                 info->mti_big_lmmsize = size;
 574         }
 575         LASSERT(info->mti_big_lmmsize >= rc);
 576
 577         info->mti_buf.lb_buf = info->mti_big_lmm;
 578         info->mti_buf.lb_len = info->mti_big_lmmsize;
 579         rc = mo_xattr_get(env, mdt_object_child(o), &info->mti_buf, name);
 580
 581         RETURN(rc);
 582 }
 583
 584 int mdt_attr_get_lov(struct mdt_thread_info *info,
 585                      struct mdt_object *o, struct md_attr *ma)
 586 {
 587         struct md_object *next = mdt_object_child(o);
 588         struct lu_buf    *buf = &info->mti_buf;
 589         int rc;
 590
 591         buf->lb_buf = ma->ma_lmm;
 592         buf->lb_len = ma->ma_lmm_size;
 593         rc = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_LOV);
 594         if (rc > 0) {
 595                 ma->ma_lmm_size = rc;
 596                 ma->ma_valid |= MA_LOV;
 597                 rc = 0;
 598         } else if (rc == -ENODATA) {
 599                 /* no LOV EA */
 600                 rc = 0;
 601         } else if (rc == -ERANGE) {
 602                 rc = mdt_big_xattr_get(info, o, XATTR_NAME_LOV);
 603                 if (rc > 0) {
 604                         info->mti_big_lmm_used = 1;
 605                         ma->ma_valid |= MA_LOV;
 606                         ma->ma_lmm = info->mti_big_lmm;
 607                         ma->ma_lmm_size = rc;
 608                         /* update mdt_max_mdsize so all clients
 609                          * will be aware about that */
 610                         if (info->mti_mdt->mdt_max_mdsize < rc)
 611                                 info->mti_mdt->mdt_max_mdsize = rc;
 612                         rc = 0;
 613                 }
 614         }
 615
 616         return rc;
 617 }
 618
 619 int mdt_attr_get_pfid(struct mdt_thread_info *info,
 620                       struct mdt_object *o, struct lu_fid *pfid)
 621 {
 622         struct lu_buf           *buf = &info->mti_buf;
 623         struct link_ea_header   *leh;
 624         struct link_ea_entry    *lee;
 625         int                      rc;
 626         ENTRY;
 627
 628         buf->lb_buf = info->mti_big_lmm;
 629         buf->lb_len = info->mti_big_lmmsize;
 630         rc = mo_xattr_get(info->mti_env, mdt_object_child(o),
 631                           buf, XATTR_NAME_LINK);
 632         /* ignore errors, MA_PFID won't be set and it is
 633          * up to the caller to treat this as an error */
 634         if (rc == -ERANGE || buf->lb_len == 0) {
 635                 rc = mdt_big_xattr_get(info, o, XATTR_NAME_LINK);
 636                 buf->lb_buf = info->mti_big_lmm;
 637                 buf->lb_len = info->mti_big_lmmsize;
 638         }
 639
 640         if (rc < 0)
 641                 RETURN(rc);
 642         if (rc < sizeof(*leh)) {
 643                 CERROR("short LinkEA on "DFID": rc = %d\n",
 644                        PFID(mdt_object_fid(o)), rc);
 645                 RETURN(-ENODATA);
 646         }
 647
 648         leh = (struct link_ea_header *) buf->lb_buf;
 649         lee = (struct link_ea_entry *)(leh + 1);
 650         if (leh->leh_magic == __swab32(LINK_EA_MAGIC)) {
 651                 leh->leh_magic = LINK_EA_MAGIC;
 652                 leh->leh_reccount = __swab32(leh->leh_reccount);
 653                 leh->leh_len = __swab64(leh->leh_len);
 654         }
 655         if (leh->leh_magic != LINK_EA_MAGIC)
 656                 RETURN(-EINVAL);
 657         if (leh->leh_reccount == 0)
 658                 RETURN(-ENODATA);
 659
 660         memcpy(pfid, &lee->lee_parent_fid, sizeof(*pfid));
 661         fid_be_to_cpu(pfid, pfid);
 662
 663         RETURN(0);
 664 }
 665
 666 int mdt_attr_get_complex(struct mdt_thread_info *info,
 667                          struct mdt_object *o, struct md_attr *ma)
 668 {
 669         const struct lu_env *env = info->mti_env;
 670         struct md_object    *next = mdt_object_child(o);
 671         struct lu_buf       *buf = &info->mti_buf;
 672         u32                  mode = lu_object_attr(&next->mo_lu);
 673         int                  need = ma->ma_need;
 674         int                  rc = 0, rc2;
 675         ENTRY;
 676
 677         ma->ma_valid = 0;
 678
 679         if (need & MA_INODE) {
 680                 ma->ma_need = MA_INODE;
 681                 rc = mo_attr_get(env, next, ma);
 682                 if (rc)
 683                         GOTO(out, rc);
 684                 ma->ma_valid |= MA_INODE;
 685         }
 686
 687         if (need & MA_PFID) {
 688                 rc = mdt_attr_get_pfid(info, o, &ma->ma_pfid);
 689                 if (rc == 0)
 690                         ma->ma_valid |= MA_PFID;
 691                 /* ignore this error, parent fid is not mandatory */
 692                 rc = 0;
 693         }
 694
 695         if (need & MA_LOV && (S_ISREG(mode) || S_ISDIR(mode))) {
 696                 rc = mdt_attr_get_lov(info, o, ma);
 697                 if (rc)
 698                         GOTO(out, rc);
 699         }
 700
 701         if (need & MA_LMV && S_ISDIR(mode)) {
 702                 buf->lb_buf = ma->ma_lmv;
 703                 buf->lb_len = ma->ma_lmv_size;
 704                 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_LMV);
 705                 if (rc2 > 0) {
 706                         ma->ma_lmv_size = rc2;
 707                         ma->ma_valid |= MA_LMV;
 708                 } else if (rc2 == -ENODATA) {
 709                         /* no LMV EA */
 710                         ma->ma_lmv_size = 0;
 711                 } else
 712                         GOTO(out, rc = rc2);
 713         }
 714
 715         if (need & MA_SOM && S_ISREG(mode)) {
 716                 buf->lb_buf = info->mti_xattr_buf;
 717                 buf->lb_len = sizeof(info->mti_xattr_buf);
 718                 CLASSERT(sizeof(struct som_attrs) <=
 719                          sizeof(info->mti_xattr_buf));
 720                 rc2 = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_SOM);
 721                 rc2 = lustre_buf2som(info->mti_xattr_buf, rc2, ma->ma_som);
 722                 if (rc2 == 0)
 723                         ma->ma_valid |= MA_SOM;
 724                 else if (rc2 < 0 && rc2 != -ENODATA)
 725                         GOTO(out, rc = rc2);
 726         }
 727
 728         if (need & MA_HSM && S_ISREG(mode)) {
 729                 buf->lb_buf = info->mti_xattr_buf;
 730                 buf->lb_len = sizeof(info->mti_xattr_buf);
 731                 CLASSERT(sizeof(struct hsm_attrs) <=
 732                          sizeof(info->mti_xattr_buf));
 733                 rc2 = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_HSM);
 734                 rc2 = lustre_buf2hsm(info->mti_xattr_buf, rc2, &ma->ma_hsm);
 735                 if (rc2 == 0)
 736                         ma->ma_valid |= MA_HSM;
 737                 else if (rc2 < 0 && rc2 != -ENODATA)
 738                         GOTO(out, rc = rc2);
 739         }
 740
 741 #ifdef CONFIG_FS_POSIX_ACL
 742         if (need & MA_ACL_DEF && S_ISDIR(mode)) {
 743                 buf->lb_buf = ma->ma_acl;
 744                 buf->lb_len = ma->ma_acl_size;
 745                 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_DEFAULT);
 746                 if (rc2 > 0) {
 747                         ma->ma_acl_size = rc2;
 748                         ma->ma_valid |= MA_ACL_DEF;
 749                 } else if (rc2 == -ENODATA) {
 750                         /* no ACLs */
 751                         ma->ma_acl_size = 0;
 752                 } else
 753                         GOTO(out, rc = rc2);
 754         }
 755 #endif
 756 out:
 757         ma->ma_need = need;
 758         CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64" ma_lmm=%p\n",
 759                rc, ma->ma_valid, ma->ma_lmm);
 760         RETURN(rc);
 761 }
 762
 763 static int mdt_getattr_internal(struct mdt_thread_info *info,
 764                                 struct mdt_object *o, int ma_need)
 765 {
 766         struct md_object        *next = mdt_object_child(o);
 767         const struct mdt_body   *reqbody = info->mti_body;
 768         struct ptlrpc_request   *req = mdt_info_req(info);
 769         struct md_attr          *ma = &info->mti_attr;
 770         struct lu_attr          *la = &ma->ma_attr;
 771         struct req_capsule      *pill = info->mti_pill;
 772         const struct lu_env     *env = info->mti_env;
 773         struct mdt_body         *repbody;
 774         struct lu_buf           *buffer = &info->mti_buf;
 775         int                     rc;
 776         int                     is_root;
 777         ENTRY;
 778
 779         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK))
 780                 RETURN(err_serious(-ENOMEM));
 781
 782         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 783
 784         ma->ma_valid = 0;
 785
 786         rc = mdt_object_exists(o);
 787         if (rc < 0) {
 788                 /* This object is located on remote node.*/
 789                 repbody->fid1 = *mdt_object_fid(o);
 790                 repbody->valid = OBD_MD_FLID | OBD_MD_MDS;
 791                 GOTO(out, rc = 0);
 792         }
 793
 794         buffer->lb_len = reqbody->eadatasize;
 795         if (buffer->lb_len > 0)
 796                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_MDT_MD);
 797         else
 798                 buffer->lb_buf = NULL;
 799
 800         /* If it is dir object and client require MEA, then we got MEA */
 801         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 802             reqbody->valid & OBD_MD_MEA) {
 803                 /* Assumption: MDT_MD size is enough for lmv size. */
 804                 ma->ma_lmv = buffer->lb_buf;
 805                 ma->ma_lmv_size = buffer->lb_len;
 806                 ma->ma_need = MA_LMV | MA_INODE;
 807         } else {
 808                 ma->ma_lmm = buffer->lb_buf;
 809                 ma->ma_lmm_size = buffer->lb_len;
 810                 ma->ma_need = MA_LOV | MA_INODE;
 811         }
 812
 813         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 814             reqbody->valid & OBD_MD_FLDIREA  &&
 815             lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR) {
 816                 /* get default stripe info for this dir. */
 817                 ma->ma_need |= MA_LOV_DEF;
 818         }
 819         ma->ma_need |= ma_need;
 820         if (ma->ma_need & MA_SOM)
 821                 ma->ma_som = &info->mti_u.som.data;
 822
 823         rc = mdt_attr_get_complex(info, o, ma);
 824         if (unlikely(rc)) {
 825                 CERROR("getattr error for "DFID": %d\n",
 826                         PFID(mdt_object_fid(o)), rc);
 827                 RETURN(rc);
 828         }
 829
 830         is_root = lu_fid_eq(mdt_object_fid(o), &info->mti_mdt->mdt_md_root_fid);
 831
 832         /* the Lustre protocol supposes to return default striping
 833          * on the user-visible root if explicitly requested */
 834         if ((ma->ma_valid & MA_LOV) == 0 && S_ISDIR(la->la_mode) &&
 835             (ma->ma_need & MA_LOV_DEF && is_root) && (ma->ma_need & MA_LOV)) {
 836                 struct lu_fid      rootfid;
 837                 struct mdt_object *root;
 838                 struct mdt_device *mdt = info->mti_mdt;
 839
 840                 rc = dt_root_get(env, mdt->mdt_bottom, &rootfid);
 841                 if (rc)
 842                         RETURN(rc);
 843                 root = mdt_object_find(env, mdt, &rootfid);
 844                 if (IS_ERR(root))
 845                         RETURN(PTR_ERR(root));
 846                 rc = mdt_attr_get_lov(info, root, ma);
 847                 mdt_object_put(info->mti_env, root);
 848                 if (unlikely(rc)) {
 849                         CERROR("getattr error for "DFID": %d\n",
 850                                         PFID(mdt_object_fid(o)), rc);
 851                         RETURN(rc);
 852                 }
 853         }
 854
 855         if (likely(ma->ma_valid & MA_INODE))
 856                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
 857         else
 858                 RETURN(-EFAULT);
 859
 860         if (mdt_body_has_lov(la, reqbody)) {
 861                 if (ma->ma_valid & MA_LOV) {
 862                         LASSERT(ma->ma_lmm_size);
 863                         mdt_dump_lmm(D_INFO, ma->ma_lmm);
 864                         repbody->eadatasize = ma->ma_lmm_size;
 865                         if (S_ISDIR(la->la_mode))
 866                                 repbody->valid |= OBD_MD_FLDIREA;
 867                         else
 868                                 repbody->valid |= OBD_MD_FLEASIZE;
 869                 }
 870                 if (ma->ma_valid & MA_LMV) {
 871                         LASSERT(S_ISDIR(la->la_mode));
 872                         repbody->eadatasize = ma->ma_lmv_size;
 873                         repbody->valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
 874                 }
 875         } else if (S_ISLNK(la->la_mode) &&
 876                    reqbody->valid & OBD_MD_LINKNAME) {
 877                 buffer->lb_buf = ma->ma_lmm;
 878                 /* eadatasize from client includes NULL-terminator, so
 879                  * there is no need to read it */
 880                 buffer->lb_len = reqbody->eadatasize - 1;
 881                 rc = mo_readlink(env, next, buffer);
 882                 if (unlikely(rc <= 0)) {
 883                         CERROR("readlink failed: %d\n", rc);
 884                         rc = -EFAULT;
 885                 } else {
 886                         int print_limit = min_t(int, CFS_PAGE_SIZE - 128, rc);
 887
 888                         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
 889                                 rc -= 2;
 890                         repbody->valid |= OBD_MD_LINKNAME;
 891                         /* we need to report back size with NULL-terminator
 892                          * because client expects that */
 893                         repbody->eadatasize = rc + 1;
 894                         if (repbody->eadatasize != reqbody->eadatasize)
 895                                 CERROR("Read shorter symlink %d, expected %d\n",
 896                                        rc, reqbody->eadatasize - 1);
 897                         /* NULL terminate */
 898                         ((char *)ma->ma_lmm)[rc] = 0;
 899
 900                         /* If the total CDEBUG() size is larger than a page, it
 901                          * will print a warning to the console, avoid this by
 902                          * printing just the last part of the symlink. */
 903                         CDEBUG(D_INODE, "symlink dest %s%.*s, len = %d\n",
 904                                print_limit < rc ? "..." : "", print_limit,
 905                                (char *)ma->ma_lmm + rc - print_limit, rc);
 906                         rc = 0;
 907                 }
 908         }
 909
 910         if (reqbody->valid & OBD_MD_FLMODEASIZE) {
 911                 repbody->max_cookiesize = 0;
 912                 repbody->max_mdsize = info->mti_mdt->mdt_max_mdsize;
 913                 repbody->valid |= OBD_MD_FLMODEASIZE;
 914                 CDEBUG(D_INODE, "I am going to change the MAX_MD_SIZE & "
 915                        "MAX_COOKIE to : %d:%d\n", repbody->max_mdsize,
 916                        repbody->max_cookiesize);
 917         }
 918
 919         if (exp_connect_rmtclient(info->mti_exp) &&
 920             reqbody->valid & OBD_MD_FLRMTPERM) {
 921                 void *buf = req_capsule_server_get(pill, &RMF_ACL);
 922
 923                 /* mdt_getattr_lock only */
 924                 rc = mdt_pack_remote_perm(info, o, buf);
 925                 if (rc) {
 926                         repbody->valid &= ~OBD_MD_FLRMTPERM;
 927                         repbody->aclsize = 0;
 928                         RETURN(rc);
 929                 } else {
 930                         repbody->valid |= OBD_MD_FLRMTPERM;
 931                         repbody->aclsize = sizeof(struct mdt_remote_perm);
 932                 }
 933         }
 934 #ifdef CONFIG_FS_POSIX_ACL
 935         else if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
 936                  (reqbody->valid & OBD_MD_FLACL)) {
 937                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_ACL);
 938                 buffer->lb_len = req_capsule_get_size(pill,
 939                                                       &RMF_ACL, RCL_SERVER);
 940                 if (buffer->lb_len > 0) {
 941                         rc = mo_xattr_get(env, next, buffer,
 942                                           XATTR_NAME_ACL_ACCESS);
 943                         if (rc < 0) {
 944                                 if (rc == -ENODATA) {
 945                                         repbody->aclsize = 0;
 946                                         repbody->valid |= OBD_MD_FLACL;
 947                                         rc = 0;
 948                                 } else if (rc == -EOPNOTSUPP) {
 949                                         rc = 0;
 950                                 } else {
 951                                         CERROR("got acl size: %d\n", rc);
 952                                 }
 953                         } else {
 954                                 repbody->aclsize = rc;
 955                                 repbody->valid |= OBD_MD_FLACL;
 956                                 rc = 0;
 957                         }
 958                 }
 959         }
 960 #endif
 961
 962         if (reqbody->valid & OBD_MD_FLMDSCAPA &&
 963             info->mti_mdt->mdt_opts.mo_mds_capa &&
 964             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 965                 struct lustre_capa *capa;
 966
 967                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 968                 LASSERT(capa);
 969                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 970                 rc = mo_capa_get(env, next, capa, 0);
 971                 if (rc)
 972                         RETURN(rc);
 973                 repbody->valid |= OBD_MD_FLMDSCAPA;
 974         }
 975
 976 out:
 977         if (rc == 0)
 978                 mdt_counter_incr(req, LPROC_MDT_GETATTR);
 979
 980         RETURN(rc);
 981 }
 982
 983 static int mdt_renew_capa(struct mdt_thread_info *info)
 984 {
 985         struct mdt_object  *obj = info->mti_object;
 986         struct mdt_body    *body;
 987         struct lustre_capa *capa, *c;
 988         int rc;
 989         ENTRY;
 990
 991         /* if object doesn't exist, or server has disabled capability,
 992          * return directly, client will find body->valid OBD_MD_FLOSSCAPA
 993          * flag not set.
 994          */
 995         if (!obj || !info->mti_mdt->mdt_opts.mo_oss_capa ||
 996             !(info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA))
 997                 RETURN(0);
 998
 999         body = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1000         LASSERT(body != NULL);
1001
1002         c = req_capsule_client_get(info->mti_pill, &RMF_CAPA1);
1003         LASSERT(c);
1004
1005         capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
1006         LASSERT(capa);
1007
1008         *capa = *c;
1009         rc = mo_capa_get(info->mti_env, mdt_object_child(obj), capa, 1);
1010         if (rc == 0)
1011                 body->valid |= OBD_MD_FLOSSCAPA;
1012         RETURN(rc);
1013 }
1014
1015 static int mdt_getattr(struct mdt_thread_info *info)
1016 {
1017         struct mdt_object       *obj = info->mti_object;
1018         struct req_capsule      *pill = info->mti_pill;
1019         struct mdt_body         *reqbody;
1020         struct mdt_body         *repbody;
1021         mode_t                   mode;
1022         int rc, rc2;
1023         ENTRY;
1024
1025         reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
1026         LASSERT(reqbody);
1027
1028         if (reqbody->valid & OBD_MD_FLOSSCAPA) {
1029                 rc = req_capsule_server_pack(pill);
1030                 if (unlikely(rc))
1031                         RETURN(err_serious(rc));
1032                 rc = mdt_renew_capa(info);
1033                 GOTO(out_shrink, rc);
1034         }
1035
1036         LASSERT(obj != NULL);
1037         LASSERT(lu_object_assert_exists(&obj->mot_obj.mo_lu));
1038
1039         mode = lu_object_attr(&obj->mot_obj.mo_lu);
1040
1041         /* old clients may not report needed easize, use max value then */
1042         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
1043                              reqbody->eadatasize == 0 ?
1044                              info->mti_mdt->mdt_max_mdsize :
1045                              reqbody->eadatasize);
1046
1047         rc = req_capsule_server_pack(pill);
1048         if (unlikely(rc != 0))
1049                 RETURN(err_serious(rc));
1050
1051         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1052         LASSERT(repbody != NULL);
1053         repbody->eadatasize = 0;
1054         repbody->aclsize = 0;
1055
1056         if (reqbody->valid & OBD_MD_FLRMTPERM)
1057                 rc = mdt_init_ucred(info, reqbody);
1058         else
1059                 rc = mdt_check_ucred(info);
1060         if (unlikely(rc))
1061                 GOTO(out_shrink, rc);
1062
1063         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
1064
1065         /*
1066          * Don't check capability at all, because rename might getattr for
1067          * remote obj, and at that time no capability is available.
1068          */
1069         mdt_set_capainfo(info, 1, &reqbody->fid1, BYPASS_CAPA);
1070         rc = mdt_getattr_internal(info, obj, 0);
1071         if (reqbody->valid & OBD_MD_FLRMTPERM)
1072                 mdt_exit_ucred(info);
1073         EXIT;
1074 out_shrink:
1075         mdt_client_compatibility(info);
1076         rc2 = mdt_fix_reply(info);
1077         if (rc == 0)
1078                 rc = rc2;
1079         return rc;
1080 }
1081
1082 static int mdt_is_subdir(struct mdt_thread_info *info)
1083 {
1084         struct mdt_object     *o = info->mti_object;
1085         struct req_capsule    *pill = info->mti_pill;
1086         const struct mdt_body *body = info->mti_body;
1087         struct mdt_body       *repbody;
1088         int                    rc;
1089         ENTRY;
1090
1091         LASSERT(o != NULL);
1092
1093         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1094
1095         /*
1096          * We save last checked parent fid to @repbody->fid1 for remote
1097          * directory case.
1098          */
1099         LASSERT(fid_is_sane(&body->fid2));
1100         LASSERT(mdt_object_exists(o) > 0);
1101         rc = mdo_is_subdir(info->mti_env, mdt_object_child(o),
1102                            &body->fid2, &repbody->fid1);
1103         if (rc == 0 || rc == -EREMOTE)
1104                 repbody->valid |= OBD_MD_FLID;
1105
1106         RETURN(rc);
1107 }
1108
1109 static int mdt_raw_lookup(struct mdt_thread_info *info,
1110                           struct mdt_object *parent,
1111                           const struct lu_name *lname,
1112                           struct ldlm_reply *ldlm_rep)
1113 {
1114         struct md_object *next = mdt_object_child(info->mti_object);
1115         const struct mdt_body *reqbody = info->mti_body;
1116         struct lu_fid *child_fid = &info->mti_tmp_fid1;
1117         struct mdt_body *repbody;
1118         int rc;
1119         ENTRY;
1120
1121         if (reqbody->valid != OBD_MD_FLID)
1122                 RETURN(0);
1123
1124         LASSERT(!info->mti_cross_ref);
1125
1126         /* Only got the fid of this obj by name */
1127         fid_zero(child_fid);
1128         rc = mdo_lookup(info->mti_env, next, lname, child_fid,
1129                         &info->mti_spec);
1130 #if 0
1131         /* XXX is raw_lookup possible as intent operation? */
1132         if (rc != 0) {
1133                 if (rc == -ENOENT)
1134                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
1135                 RETURN(rc);
1136         } else
1137                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1138
1139         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1140 #endif
1141         if (rc == 0) {
1142                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1143                 repbody->fid1 = *child_fid;
1144                 repbody->valid = OBD_MD_FLID;
1145         }
1146         RETURN(1);
1147 }
1148
1149 /*
1150  * UPDATE lock should be taken against parent, and be release before exit;
1151  * child_bits lock should be taken against child, and be returned back:
1152  *            (1)normal request should release the child lock;
1153  *            (2)intent request will grant the lock to client.
1154  */
1155 static int mdt_getattr_name_lock(struct mdt_thread_info *info,
1156                                  struct mdt_lock_handle *lhc,
1157                                  __u64 child_bits,
1158                                  struct ldlm_reply *ldlm_rep)
1159 {
1160         struct ptlrpc_request  *req       = mdt_info_req(info);
1161         struct mdt_body        *reqbody   = NULL;
1162         struct mdt_object      *parent    = info->mti_object;
1163         struct mdt_object      *child;
1164         struct md_object       *next      = mdt_object_child(parent);
1165         struct lu_fid          *child_fid = &info->mti_tmp_fid1;
1166         struct lu_name         *lname     = NULL;
1167         const char             *name      = NULL;
1168         int                     namelen   = 0;
1169         struct mdt_lock_handle *lhp       = NULL;
1170         struct ldlm_lock       *lock;
1171         struct ldlm_res_id     *res_id;
1172         int                     is_resent;
1173         int                     ma_need = 0;
1174         int                     rc;
1175
1176         ENTRY;
1177
1178         is_resent = lustre_handle_is_used(&lhc->mlh_reg_lh);
1179         LASSERT(ergo(is_resent,
1180                      lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT));
1181
1182         LASSERT(parent != NULL);
1183         name = req_capsule_client_get(info->mti_pill, &RMF_NAME);
1184         if (name == NULL)
1185                 RETURN(err_serious(-EFAULT));
1186
1187         namelen = req_capsule_get_size(info->mti_pill, &RMF_NAME,
1188                                        RCL_CLIENT) - 1;
1189         if (!info->mti_cross_ref) {
1190                 /*
1191                  * XXX: Check for "namelen == 0" is for getattr by fid
1192                  * (OBD_CONNECT_ATTRFID), otherwise do not allow empty name,
1193                  * that is the name must contain at least one character and
1194                  * the terminating '\0'
1195                  */
1196                 if (namelen == 0) {
1197                         reqbody = req_capsule_client_get(info->mti_pill,
1198                                                          &RMF_MDT_BODY);
1199                         if (unlikely(reqbody == NULL))
1200                                 RETURN(err_serious(-EFAULT));
1201
1202                         if (unlikely(!fid_is_sane(&reqbody->fid2)))
1203                                 RETURN(err_serious(-EINVAL));
1204
1205                         name = NULL;
1206                         CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", "
1207                                "ldlm_rep = %p\n",
1208                                PFID(mdt_object_fid(parent)),
1209                                PFID(&reqbody->fid2), ldlm_rep);
1210                 } else {
1211                         lname = mdt_name(info->mti_env, (char *)name, namelen);
1212                         CDEBUG(D_INODE, "getattr with lock for "DFID"/%s, "
1213                                "ldlm_rep = %p\n", PFID(mdt_object_fid(parent)),
1214                                name, ldlm_rep);
1215                 }
1216         }
1217         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_EXECD);
1218
1219         rc = mdt_object_exists(parent);
1220         if (unlikely(rc == 0)) {
1221                 LU_OBJECT_DEBUG(D_INODE, info->mti_env,
1222                                 &parent->mot_obj.mo_lu,
1223                                 "Parent doesn't exist!\n");
1224                 RETURN(-ESTALE);
1225         } else if (!info->mti_cross_ref) {
1226                 LASSERTF(rc > 0, "Parent "DFID" is on remote server\n",
1227                          PFID(mdt_object_fid(parent)));
1228         }
1229         if (lname) {
1230                 rc = mdt_raw_lookup(info, parent, lname, ldlm_rep);
1231                 if (rc != 0) {
1232                         if (rc > 0)
1233                                 rc = 0;
1234                         RETURN(rc);
1235                 }
1236         }
1237
1238         if (info->mti_cross_ref) {
1239                 /* Only getattr on the child. Parent is on another node. */
1240                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1241                 child = parent;
1242                 CDEBUG(D_INODE, "partial getattr_name child_fid = "DFID", "
1243                        "ldlm_rep=%p\n", PFID(mdt_object_fid(child)), ldlm_rep);
1244
1245                 if (is_resent) {
1246                         /* Do not take lock for resent case. */
1247                         lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1248                         LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
1249                                  lhc->mlh_reg_lh.cookie);
1250                         LASSERT(fid_res_name_eq(mdt_object_fid(child),
1251                                                 &lock->l_resource->lr_name));
1252                         LDLM_LOCK_PUT(lock);
1253                         rc = 0;
1254                 } else {
1255                         mdt_lock_handle_init(lhc);
1256                         mdt_lock_reg_init(lhc, LCK_PR);
1257
1258                         /*
1259                          * Object's name is on another MDS, no lookup lock is
1260                          * needed here but update is.
1261                          */
1262                         child_bits &= ~MDS_INODELOCK_LOOKUP;
1263                         child_bits |= MDS_INODELOCK_UPDATE;
1264
1265                         rc = mdt_object_lock(info, child, lhc, child_bits,
1266                                              MDT_LOCAL_LOCK);
1267                 }
1268                 if (rc == 0) {
1269                         /* Finally, we can get attr for child. */
1270                         mdt_set_capainfo(info, 0, mdt_object_fid(child),
1271                                          BYPASS_CAPA);
1272                         rc = mdt_getattr_internal(info, child, 0);
1273                         if (unlikely(rc != 0))
1274                                 mdt_object_unlock(info, child, lhc, 1);
1275                 }
1276                 RETURN(rc);
1277         }
1278
1279         if (lname) {
1280                 /* step 1: lock parent only if parent is a directory */
1281                 if (S_ISDIR(lu_object_attr(&parent->mot_obj.mo_lu))) {
1282                         lhp = &info->mti_lh[MDT_LH_PARENT];
1283                         mdt_lock_pdo_init(lhp, LCK_PR, name, namelen);
1284                         rc = mdt_object_lock(info, parent, lhp,
1285                                              MDS_INODELOCK_UPDATE,
1286                                              MDT_LOCAL_LOCK);
1287                         if (unlikely(rc != 0))
1288                                 RETURN(rc);
1289                 }
1290
1291                 /* step 2: lookup child's fid by name */
1292                 fid_zero(child_fid);
1293                 rc = mdo_lookup(info->mti_env, next, lname, child_fid,
1294                                 &info->mti_spec);
1295
1296                 if (rc != 0) {
1297                         if (rc == -ENOENT)
1298                                 mdt_set_disposition(info, ldlm_rep,
1299                                                     DISP_LOOKUP_NEG);
1300                         GOTO(out_parent, rc);
1301                 } else
1302                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1303         } else {
1304                 *child_fid = reqbody->fid2;
1305                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1306         }
1307
1308         /*
1309          *step 3: find the child object by fid & lock it.
1310          *        regardless if it is local or remote.
1311          */
1312         child = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
1313
1314         if (unlikely(IS_ERR(child)))
1315                 GOTO(out_parent, rc = PTR_ERR(child));
1316         if (is_resent) {
1317                 /* Do not take lock for resent case. */
1318                 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1319                 LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
1320                          lhc->mlh_reg_lh.cookie);
1321
1322                 res_id = &lock->l_resource->lr_name;
1323                 if (!fid_res_name_eq(mdt_object_fid(child),
1324                                     &lock->l_resource->lr_name)) {
1325                          LASSERTF(fid_res_name_eq(mdt_object_fid(parent),
1326                                                  &lock->l_resource->lr_name),
1327                                  "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
1328                                  (unsigned long)res_id->name[0],
1329                                  (unsigned long)res_id->name[1],
1330                                  (unsigned long)res_id->name[2],
1331                                  PFID(mdt_object_fid(parent)));
1332                           CWARN("Although resent, but still not get child lock"
1333                                 "parent:"DFID" child:"DFID"\n",
1334                                 PFID(mdt_object_fid(parent)),
1335                                 PFID(mdt_object_fid(child)));
1336                           lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1337                           LDLM_LOCK_PUT(lock);
1338                           GOTO(relock, 0);
1339                 }
1340                 LDLM_LOCK_PUT(lock);
1341                 rc = 0;
1342         } else {
1343 relock:
1344                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout*2);
1345                 mdt_lock_handle_init(lhc);
1346                 if (child_bits == MDS_INODELOCK_LAYOUT)
1347                         mdt_lock_reg_init(lhc, LCK_CR);
1348                 else
1349                         mdt_lock_reg_init(lhc, LCK_PR);
1350
1351                 if (mdt_object_exists(child) == 0) {
1352                         LU_OBJECT_DEBUG(D_INODE, info->mti_env,
1353                                         &child->mot_obj.mo_lu,
1354                                         "Object doesn't exist!\n");
1355                         GOTO(out_child, rc = -ENOENT);
1356                 }
1357
1358                 if (!(child_bits & MDS_INODELOCK_UPDATE)) {
1359                         struct md_attr *ma = &info->mti_attr;
1360
1361                         ma->ma_valid = 0;
1362                         ma->ma_need = MA_INODE;
1363                         rc = mdt_attr_get_complex(info, child, ma);
1364                         if (unlikely(rc != 0))
1365                                 GOTO(out_child, rc);
1366
1367                         /* layout lock is used only on regular files */
1368                         if ((ma->ma_valid & MA_INODE) &&
1369                             (ma->ma_attr.la_valid & LA_MODE) &&
1370                             !S_ISREG(ma->ma_attr.la_mode))
1371                                 child_bits &= ~MDS_INODELOCK_LAYOUT;
1372
1373                         /* If the file has not been changed for some time, we
1374                          * return not only a LOOKUP lock, but also an UPDATE
1375                          * lock and this might save us RPC on later STAT. For
1376                          * directories, it also let negative dentry starts
1377                          * working for this dir. */
1378                         if (ma->ma_valid & MA_INODE &&
1379                             ma->ma_attr.la_valid & LA_CTIME &&
1380                             info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
1381                                 ma->ma_attr.la_ctime < cfs_time_current_sec())
1382                                 child_bits |= MDS_INODELOCK_UPDATE;
1383                 }
1384
1385                 rc = mdt_object_lock(info, child, lhc, child_bits,
1386                                      MDT_CROSS_LOCK);
1387
1388                 if (unlikely(rc != 0))
1389                         GOTO(out_child, rc);
1390         }
1391
1392         lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1393         /* Get MA_SOM attributes if update lock is given. */
1394         if (lock &&
1395             lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_UPDATE &&
1396             S_ISREG(lu_object_attr(&mdt_object_child(child)->mo_lu)))
1397                 ma_need = MA_SOM;
1398
1399         /* finally, we can get attr for child. */
1400         mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
1401         rc = mdt_getattr_internal(info, child, ma_need);
1402         if (unlikely(rc != 0)) {
1403                 mdt_object_unlock(info, child, lhc, 1);
1404         } else if (lock) {
1405                 /* Debugging code. */
1406                 res_id = &lock->l_resource->lr_name;
1407                 LDLM_DEBUG(lock, "Returning lock to client");
1408                 LASSERTF(fid_res_name_eq(mdt_object_fid(child),
1409                                          &lock->l_resource->lr_name),
1410                          "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
1411                          (unsigned long)res_id->name[0],
1412                          (unsigned long)res_id->name[1],
1413                          (unsigned long)res_id->name[2],
1414                          PFID(mdt_object_fid(child)));
1415                 mdt_pack_size2body(info, child);
1416         }
1417         if (lock)
1418                 LDLM_LOCK_PUT(lock);
1419
1420         EXIT;
1421 out_child:
1422         mdt_object_put(info->mti_env, child);
1423 out_parent:
1424         if (lhp)
1425                 mdt_object_unlock(info, parent, lhp, 1);
1426         return rc;
1427 }
1428
1429 /* normal handler: should release the child lock */
1430 static int mdt_getattr_name(struct mdt_thread_info *info)
1431 {
1432         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_CHILD];
1433         struct mdt_body        *reqbody;
1434         struct mdt_body        *repbody;
1435         int rc, rc2;
1436         ENTRY;
1437
1438         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1439         LASSERT(reqbody != NULL);
1440         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1441         LASSERT(repbody != NULL);
1442
1443         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
1444         repbody->eadatasize = 0;
1445         repbody->aclsize = 0;
1446
1447         rc = mdt_init_ucred(info, reqbody);
1448         if (unlikely(rc))
1449                 GOTO(out_shrink, rc);
1450
1451         rc = mdt_getattr_name_lock(info, lhc, MDS_INODELOCK_UPDATE, NULL);
1452         if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
1453                 ldlm_lock_decref(&lhc->mlh_reg_lh, lhc->mlh_reg_mode);
1454                 lhc->mlh_reg_lh.cookie = 0;
1455         }
1456         mdt_exit_ucred(info);
1457         EXIT;
1458 out_shrink:
1459         mdt_client_compatibility(info);
1460         rc2 = mdt_fix_reply(info);
1461         if (rc == 0)
1462                 rc = rc2;
1463         return rc;
1464 }
1465
1466 static const struct lu_device_operations mdt_lu_ops;
1467
1468 static int lu_device_is_mdt(struct lu_device *d)
1469 {
1470         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &mdt_lu_ops);
1471 }
1472
1473 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1474                          void *karg, void *uarg);
1475
1476 static int mdt_set_info(struct mdt_thread_info *info)
1477 {
1478         struct ptlrpc_request *req = mdt_info_req(info);
1479         char *key;
1480         void *val;
1481         int keylen, vallen, rc = 0;
1482         ENTRY;
1483
1484         rc = req_capsule_server_pack(info->mti_pill);
1485         if (rc)
1486                 RETURN(rc);
1487
1488         key = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_KEY);
1489         if (key == NULL) {
1490                 DEBUG_REQ(D_HA, req, "no set_info key");
1491                 RETURN(-EFAULT);
1492         }
1493
1494         keylen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_KEY,
1495                                       RCL_CLIENT);
1496
1497         val = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_VAL);
1498         if (val == NULL) {
1499                 DEBUG_REQ(D_HA, req, "no set_info val");
1500                 RETURN(-EFAULT);
1501         }
1502
1503         vallen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_VAL,
1504                                       RCL_CLIENT);
1505
1506         /* Swab any part of val you need to here */
1507         if (KEY_IS(KEY_READ_ONLY)) {
1508                 req->rq_status = 0;
1509                 lustre_msg_set_status(req->rq_repmsg, 0);
1510
1511                 spin_lock(&req->rq_export->exp_lock);
1512                 if (*(__u32 *)val)
1513                         req->rq_export->exp_connect_flags |= OBD_CONNECT_RDONLY;
1514                 else
1515                         req->rq_export->exp_connect_flags &=~OBD_CONNECT_RDONLY;
1516                 spin_unlock(&req->rq_export->exp_lock);
1517
1518         } else if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
1519                 struct changelog_setinfo *cs =
1520                         (struct changelog_setinfo *)val;
1521                 if (vallen != sizeof(*cs)) {
1522                         CERROR("Bad changelog_clear setinfo size %d\n", vallen);
1523                         RETURN(-EINVAL);
1524                 }
1525                 if (ptlrpc_req_need_swab(req)) {
1526                         __swab64s(&cs->cs_recno);
1527                         __swab32s(&cs->cs_id);
1528                 }
1529
1530                 rc = mdt_iocontrol(OBD_IOC_CHANGELOG_CLEAR, info->mti_exp,
1531                                    vallen, val, NULL);
1532                 lustre_msg_set_status(req->rq_repmsg, rc);
1533
1534         } else {
1535                 RETURN(-EINVAL);
1536         }
1537         RETURN(0);
1538 }
1539
1540 /**
1541  * Top-level handler for MDT connection requests.
1542  */
1543 static int mdt_connect(struct mdt_thread_info *info)
1544 {
1545         int rc;
1546         struct obd_connect_data *reply;
1547         struct obd_export *exp;
1548         struct ptlrpc_request *req = mdt_info_req(info);
1549
1550         rc = target_handle_connect(req);
1551         if (rc != 0)
1552                 return err_serious(rc);
1553
1554         LASSERT(req->rq_export != NULL);
1555         info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
1556         rc = mdt_init_sec_level(info);
1557         if (rc != 0) {
1558                 obd_disconnect(class_export_get(req->rq_export));
1559                 return rc;
1560         }
1561
1562         /* To avoid exposing partially initialized connection flags, changes up
1563          * to this point have been staged in reply->ocd_connect_flags. Now that
1564          * connection handling has completed successfully, atomically update
1565          * the connect flags in the shared export data structure. LU-1623 */
1566         reply = req_capsule_server_get(info->mti_pill, &RMF_CONNECT_DATA);
1567         exp = req->rq_export;
1568         spin_lock(&exp->exp_lock);
1569         exp->exp_connect_flags = reply->ocd_connect_flags;
1570         spin_unlock(&exp->exp_lock);
1571
1572         rc = mdt_init_idmap(info);
1573         if (rc != 0)
1574                 obd_disconnect(class_export_get(req->rq_export));
1575
1576         return rc;
1577 }
1578
1579 static int mdt_disconnect(struct mdt_thread_info *info)
1580 {
1581         int rc;
1582         ENTRY;
1583
1584         rc = target_handle_disconnect(mdt_info_req(info));
1585         if (rc)
1586                 rc = err_serious(rc);
1587         RETURN(rc);
1588 }
1589
1590 static int mdt_sendpage(struct mdt_thread_info *info,
1591                         struct lu_rdpg *rdpg, int nob)
1592 {
1593         struct ptlrpc_request   *req = mdt_info_req(info);
1594         struct obd_export       *exp = req->rq_export;
1595         struct ptlrpc_bulk_desc *desc;
1596         struct l_wait_info      *lwi = &info->mti_u.rdpg.mti_wait_info;
1597         int                      tmpcount;
1598         int                      tmpsize;
1599         int                      i;
1600         int                      rc;
1601         ENTRY;
1602
1603         desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, BULK_PUT_SOURCE,
1604                                     MDS_BULK_PORTAL);
1605         if (desc == NULL)
1606                 RETURN(-ENOMEM);
1607
1608         if (!(exp->exp_connect_flags & OBD_CONNECT_BRW_SIZE))
1609                 /* old client requires reply size in it's PAGE_SIZE,
1610                  * which is rdpg->rp_count */
1611                 nob = rdpg->rp_count;
1612
1613         for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1614              i++, tmpcount -= tmpsize) {
1615                 tmpsize = min_t(int, tmpcount, CFS_PAGE_SIZE);
1616                 ptlrpc_prep_bulk_page_pin(desc, rdpg->rp_pages[i], 0, tmpsize);
1617         }
1618
1619         LASSERT(desc->bd_nob == nob);
1620         rc = target_bulk_io(exp, desc, lwi);
1621         ptlrpc_free_bulk_pin(desc);
1622         RETURN(rc);
1623 }
1624
1625 static int mdt_readpage(struct mdt_thread_info *info)
1626 {
1627         struct mdt_object *object = info->mti_object;
1628         struct lu_rdpg    *rdpg = &info->mti_u.rdpg.mti_rdpg;
1629         struct mdt_body   *reqbody;
1630         struct mdt_body   *repbody;
1631         int                rc;
1632         int                i;
1633         ENTRY;
1634
1635         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
1636                 RETURN(err_serious(-ENOMEM));
1637
1638         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1639         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1640         if (reqbody == NULL || repbody == NULL)
1641                 RETURN(err_serious(-EFAULT));
1642
1643         /*
1644          * prepare @rdpg before calling lower layers and transfer itself. Here
1645          * reqbody->size contains offset of where to start to read and
1646          * reqbody->nlink contains number bytes to read.
1647          */
1648         rdpg->rp_hash = reqbody->size;
1649         if (rdpg->rp_hash != reqbody->size) {
1650                 CERROR("Invalid hash: "LPX64" != "LPX64"\n",
1651                        rdpg->rp_hash, reqbody->size);
1652                 RETURN(-EFAULT);
1653         }
1654
1655         rdpg->rp_attrs = reqbody->mode;
1656         if (info->mti_exp->exp_connect_flags & OBD_CONNECT_64BITHASH)
1657                 rdpg->rp_attrs |= LUDA_64BITHASH;
1658         rdpg->rp_count  = min_t(unsigned int, reqbody->nlink,
1659                                 PTLRPC_MAX_BRW_SIZE);
1660         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE - 1) >>
1661                           CFS_PAGE_SHIFT;
1662         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1663         if (rdpg->rp_pages == NULL)
1664                 RETURN(-ENOMEM);
1665
1666         for (i = 0; i < rdpg->rp_npages; ++i) {
1667                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
1668                 if (rdpg->rp_pages[i] == NULL)
1669                         GOTO(free_rdpg, rc = -ENOMEM);
1670         }
1671
1672         /* call lower layers to fill allocated pages with directory data */
1673         rc = mo_readpage(info->mti_env, mdt_object_child(object), rdpg);
1674         if (rc < 0)
1675                 GOTO(free_rdpg, rc);
1676
1677         /* send pages to client */
1678         rc = mdt_sendpage(info, rdpg, rc);
1679
1680         EXIT;
1681 free_rdpg:
1682
1683         for (i = 0; i < rdpg->rp_npages; i++)
1684                 if (rdpg->rp_pages[i] != NULL)
1685                         cfs_free_page(rdpg->rp_pages[i]);
1686         OBD_FREE(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1687
1688         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
1689                 RETURN(0);
1690
1691         return rc;
1692 }
1693
1694 static int mdt_reint_internal(struct mdt_thread_info *info,
1695                               struct mdt_lock_handle *lhc,
1696                               __u32 op)
1697 {
1698         struct req_capsule      *pill = info->mti_pill;
1699         struct mdt_body         *repbody;
1700         int                      rc = 0, rc2;
1701         ENTRY;
1702
1703
1704         rc = mdt_reint_unpack(info, op);
1705         if (rc != 0) {
1706                 CERROR("Can't unpack reint, rc %d\n", rc);
1707                 RETURN(err_serious(rc));
1708         }
1709
1710         /* for replay (no_create) lmm is not needed, client has it already */
1711         if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1712                 req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
1713                                      info->mti_rr.rr_eadatalen);
1714
1715         /* llog cookies are always 0, the field is kept for compatibility */
1716         if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
1717                 req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER, 0);
1718
1719         rc = req_capsule_server_pack(pill);
1720         if (rc != 0) {
1721                 CERROR("Can't pack response, rc %d\n", rc);
1722                 RETURN(err_serious(rc));
1723         }
1724
1725         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_SERVER)) {
1726                 repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1727                 LASSERT(repbody);
1728                 repbody->eadatasize = 0;
1729                 repbody->aclsize = 0;
1730         }
1731
1732         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_REINT_DELAY, 10);
1733
1734         /* for replay no cookkie / lmm need, because client have this already */
1735         if (info->mti_spec.no_create)
1736                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1737                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, 0);
1738
1739         rc = mdt_init_ucred_reint(info);
1740         if (rc)
1741                 GOTO(out_shrink, rc);
1742
1743         rc = mdt_fix_attr_ucred(info, op);
1744         if (rc != 0)
1745                 GOTO(out_ucred, rc = err_serious(rc));
1746
1747         if (mdt_check_resent(info, mdt_reconstruct, lhc)) {
1748                 rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
1749                 GOTO(out_ucred, rc);
1750         }
1751         rc = mdt_reint_rec(info, lhc);
1752         EXIT;
1753 out_ucred:
1754         mdt_exit_ucred(info);
1755 out_shrink:
1756         mdt_client_compatibility(info);
1757         rc2 = mdt_fix_reply(info);
1758         if (rc == 0)
1759                 rc = rc2;
1760         return rc;
1761 }
1762
1763 static long mdt_reint_opcode(struct mdt_thread_info *info,
1764                              const struct req_format **fmt)
1765 {
1766         struct mdt_rec_reint *rec;
1767         long opc;
1768
1769         opc = err_serious(-EFAULT);
1770         rec = req_capsule_client_get(info->mti_pill, &RMF_REC_REINT);
1771         if (rec != NULL) {
1772                 opc = rec->rr_opcode;
1773                 DEBUG_REQ(D_INODE, mdt_info_req(info), "reint opt = %ld", opc);
1774                 if (opc < REINT_MAX && fmt[opc] != NULL)
1775                         req_capsule_extend(info->mti_pill, fmt[opc]);
1776                 else {
1777                         CERROR("Unsupported opc: %ld\n", opc);
1778                         opc = err_serious(opc);
1779                 }
1780         }
1781         return opc;
1782 }
1783
1784 static int mdt_reint(struct mdt_thread_info *info)
1785 {
1786         long opc;
1787         int  rc;
1788
1789         static const struct req_format *reint_fmts[REINT_MAX] = {
1790                 [REINT_SETATTR]  = &RQF_MDS_REINT_SETATTR,
1791                 [REINT_CREATE]   = &RQF_MDS_REINT_CREATE,
1792                 [REINT_LINK]     = &RQF_MDS_REINT_LINK,
1793                 [REINT_UNLINK]   = &RQF_MDS_REINT_UNLINK,
1794                 [REINT_RENAME]   = &RQF_MDS_REINT_RENAME,
1795                 [REINT_OPEN]     = &RQF_MDS_REINT_OPEN,
1796                 [REINT_SETXATTR] = &RQF_MDS_REINT_SETXATTR
1797         };
1798
1799         ENTRY;
1800
1801         opc = mdt_reint_opcode(info, reint_fmts);
1802         if (opc >= 0) {
1803                 /*
1804                  * No lock possible here from client to pass it to reint code
1805                  * path.
1806                  */
1807                 rc = mdt_reint_internal(info, NULL, opc);
1808         } else {
1809                 rc = opc;
1810         }
1811
1812         info->mti_fail_id = OBD_FAIL_MDS_REINT_NET_REP;
1813         RETURN(rc);
1814 }
1815
1816 /* this should sync the whole device */
1817 static int mdt_device_sync(const struct lu_env *env, struct mdt_device *mdt)
1818 {
1819         struct dt_device *dt = mdt->mdt_bottom;
1820         int rc;
1821         ENTRY;
1822
1823         rc = dt->dd_ops->dt_sync(env, dt);
1824         RETURN(rc);
1825 }
1826
1827 /* this should sync this object */
1828 static int mdt_object_sync(struct mdt_thread_info *info)
1829 {
1830         struct md_object *next;
1831         int rc;
1832         ENTRY;
1833
1834         if (!mdt_object_exists(info->mti_object)) {
1835                 CWARN("Non existing object  "DFID"!\n",
1836                       PFID(mdt_object_fid(info->mti_object)));
1837                 RETURN(-ESTALE);
1838         }
1839         next = mdt_object_child(info->mti_object);
1840         rc = mo_object_sync(info->mti_env, next);
1841
1842         RETURN(rc);
1843 }
1844
1845 static int mdt_sync(struct mdt_thread_info *info)
1846 {
1847         struct ptlrpc_request *req = mdt_info_req(info);
1848         struct req_capsule *pill = info->mti_pill;
1849         struct mdt_body *body;
1850         int rc;
1851         ENTRY;
1852
1853         /* The fid may be zero, so we req_capsule_set manually */
1854         req_capsule_set(pill, &RQF_MDS_SYNC);
1855
1856         body = req_capsule_client_get(pill, &RMF_MDT_BODY);
1857         if (body == NULL)
1858                 RETURN(err_serious(-EINVAL));
1859
1860         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1861                 RETURN(err_serious(-ENOMEM));
1862
1863         if (fid_seq(&body->fid1) == 0) {
1864                 /* sync the whole device */
1865                 rc = req_capsule_server_pack(pill);
1866                 if (rc == 0)
1867                         rc = mdt_device_sync(info->mti_env, info->mti_mdt);
1868                 else
1869                         rc = err_serious(rc);
1870         } else {
1871                 /* sync an object */
1872                 rc = mdt_unpack_req_pack_rep(info, HABEO_CORPUS|HABEO_REFERO);
1873                 if (rc == 0) {
1874                         rc = mdt_object_sync(info);
1875                         if (rc == 0) {
1876                                 const struct lu_fid *fid;
1877                                 struct lu_attr *la = &info->mti_attr.ma_attr;
1878
1879                                 info->mti_attr.ma_need = MA_INODE;
1880                                 info->mti_attr.ma_valid = 0;
1881                                 rc = mdt_attr_get_complex(info, info->mti_object,
1882                                                           &info->mti_attr);
1883                                 if (rc == 0) {
1884                                         body = req_capsule_server_get(pill,
1885                                                                 &RMF_MDT_BODY);
1886                                         fid = mdt_object_fid(info->mti_object);
1887                                         mdt_pack_attr2body(info, body, la, fid);
1888                                 }
1889                         }
1890                 } else
1891                         rc = err_serious(rc);
1892         }
1893         if (rc == 0)
1894                 mdt_counter_incr(req, LPROC_MDT_SYNC);
1895
1896         RETURN(rc);
1897 }
1898
1899 /*
1900  * Quotacheck handler.
1901  * in-kernel quotacheck isn't supported any more.
1902  */
1903 static int mdt_quotacheck(struct mdt_thread_info *info)
1904 {
1905         struct obd_quotactl     *oqctl;
1906         int                      rc;
1907         ENTRY;
1908
1909         oqctl = req_capsule_client_get(info->mti_pill, &RMF_OBD_QUOTACTL);
1910         if (oqctl == NULL)
1911                 RETURN(err_serious(-EPROTO));
1912
1913         rc = req_capsule_server_pack(info->mti_pill);
1914         if (rc)
1915                 RETURN(err_serious(rc));
1916
1917         /* deprecated, not used any more */
1918         RETURN(-EOPNOTSUPP);
1919 }
1920
1921 /*
1922  * Handle quota control requests to consult current usage/limit, but also
1923  * to configure quota enforcement
1924  */
1925 static int mdt_quotactl(struct mdt_thread_info *info)
1926 {
1927         struct obd_export       *exp  = info->mti_exp;
1928         struct req_capsule      *pill = info->mti_pill;
1929         struct obd_quotactl     *oqctl, *repoqc;
1930         int                      id, rc;
1931         struct lu_device        *qmt = info->mti_mdt->mdt_qmt_dev;
1932         ENTRY;
1933
1934         oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
1935         if (oqctl == NULL)
1936                 RETURN(err_serious(-EPROTO));
1937
1938         rc = req_capsule_server_pack(pill);
1939         if (rc)
1940                 RETURN(err_serious(rc));
1941
1942         switch (oqctl->qc_cmd) {
1943         case Q_QUOTACHECK:
1944         case LUSTRE_Q_INVALIDATE:
1945         case LUSTRE_Q_FINVALIDATE:
1946         case Q_QUOTAON:
1947         case Q_QUOTAOFF:
1948         case Q_INITQUOTA:
1949                 /* deprecated, not used any more */
1950                 RETURN(-EOPNOTSUPP);
1951                 /* master quotactl */
1952         case Q_GETINFO:
1953         case Q_SETINFO:
1954         case Q_SETQUOTA:
1955         case Q_GETQUOTA:
1956                 if (qmt == NULL)
1957                         RETURN(-EOPNOTSUPP);
1958                 /* slave quotactl */
1959         case Q_GETOINFO:
1960         case Q_GETOQUOTA:
1961                 break;
1962         default:
1963                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
1964                 RETURN(-EFAULT);
1965         }
1966
1967         /* map uid/gid for remote client */
1968         id = oqctl->qc_id;
1969         if (exp_connect_rmtclient(exp)) {
1970                 struct lustre_idmap_table *idmap;
1971
1972                 idmap = mdt_req2med(mdt_info_req(info))->med_idmap;
1973
1974                 if (unlikely(oqctl->qc_cmd != Q_GETQUOTA &&
1975                              oqctl->qc_cmd != Q_GETINFO))
1976                         RETURN(-EPERM);
1977
1978                 if (oqctl->qc_type == USRQUOTA)
1979                         id = lustre_idmap_lookup_uid(NULL, idmap, 0,
1980                                                      oqctl->qc_id);
1981                 else if (oqctl->qc_type == GRPQUOTA)
1982                         id = lustre_idmap_lookup_gid(NULL, idmap, 0,
1983                                                      oqctl->qc_id);
1984                 else
1985                         RETURN(-EINVAL);
1986
1987                 if (id == CFS_IDMAP_NOTFOUND) {
1988                         CDEBUG(D_QUOTA, "no mapping for id %u\n", oqctl->qc_id);
1989                         RETURN(-EACCES);
1990                 }
1991         }
1992
1993         repoqc = req_capsule_server_get(pill, &RMF_OBD_QUOTACTL);
1994         if (repoqc == NULL)
1995                 RETURN(err_serious(-EFAULT));
1996
1997         if (oqctl->qc_id != id)
1998                 swap(oqctl->qc_id, id);
1999
2000         switch (oqctl->qc_cmd) {
2001
2002         case Q_GETINFO:
2003         case Q_SETINFO:
2004         case Q_SETQUOTA:
2005         case Q_GETQUOTA:
2006                 /* forward quotactl request to QMT */
2007                 rc = qmt_hdls.qmth_quotactl(info->mti_env, qmt, oqctl);
2008                 break;
2009
2010         case Q_GETOINFO:
2011         case Q_GETOQUOTA:
2012                 /* slave quotactl */
2013                 rc = lquotactl_slv(info->mti_env, info->mti_mdt->mdt_bottom,
2014                                    oqctl);
2015                 break;
2016
2017         default:
2018                 CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
2019                 RETURN(-EFAULT);
2020         }
2021
2022         if (oqctl->qc_id != id)
2023                 swap(oqctl->qc_id, id);
2024
2025         *repoqc = *oqctl;
2026         RETURN(rc);
2027 }
2028
2029 /*
2030  * OBD PING and other handlers.
2031  */
2032 static int mdt_obd_ping(struct mdt_thread_info *info)
2033 {
2034         int rc;
2035         ENTRY;
2036
2037         req_capsule_set(info->mti_pill, &RQF_OBD_PING);
2038
2039         rc = target_handle_ping(mdt_info_req(info));
2040         if (rc < 0)
2041                 rc = err_serious(rc);
2042         RETURN(rc);
2043 }
2044
2045 /*
2046  * OBD_IDX_READ handler
2047  */
2048 static int mdt_obd_idx_read(struct mdt_thread_info *info)
2049 {
2050         struct mdt_device       *mdt = info->mti_mdt;
2051         struct lu_rdpg          *rdpg = &info->mti_u.rdpg.mti_rdpg;
2052         struct idx_info         *req_ii, *rep_ii;
2053         int                      rc, i;
2054         ENTRY;
2055
2056         memset(rdpg, 0, sizeof(*rdpg));
2057         req_capsule_set(info->mti_pill, &RQF_OBD_IDX_READ);
2058
2059         /* extract idx_info buffer from request & reply */
2060         req_ii = req_capsule_client_get(info->mti_pill, &RMF_IDX_INFO);
2061         if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
2062                 RETURN(err_serious(-EPROTO));
2063
2064         rc = req_capsule_server_pack(info->mti_pill);
2065         if (rc)
2066                 RETURN(err_serious(rc));
2067
2068         rep_ii = req_capsule_server_get(info->mti_pill, &RMF_IDX_INFO);
2069         if (rep_ii == NULL)
2070                 RETURN(err_serious(-EFAULT));
2071         rep_ii->ii_magic = IDX_INFO_MAGIC;
2072
2073         /* extract hash to start with */
2074         rdpg->rp_hash = req_ii->ii_hash_start;
2075
2076         /* extract requested attributes */
2077         rdpg->rp_attrs = req_ii->ii_attrs;
2078
2079         /* check that fid packed in request is valid and supported */
2080         if (!fid_is_sane(&req_ii->ii_fid))
2081                 RETURN(-EINVAL);
2082         rep_ii->ii_fid = req_ii->ii_fid;
2083
2084         /* copy flags */
2085         rep_ii->ii_flags = req_ii->ii_flags;
2086
2087         /* compute number of pages to allocate, ii_count is the number of 4KB
2088          * containers */
2089         if (req_ii->ii_count <= 0)
2090                 GOTO(out, rc = -EFAULT);
2091         rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
2092                                PTLRPC_MAX_BRW_SIZE);
2093         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE -1) >> CFS_PAGE_SHIFT;
2094
2095         /* allocate pages to store the containers */
2096         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2097         if (rdpg->rp_pages == NULL)
2098                 GOTO(out, rc = -ENOMEM);
2099         for (i = 0; i < rdpg->rp_npages; i++) {
2100                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
2101                 if (rdpg->rp_pages[i] == NULL)
2102                         GOTO(out, rc = -ENOMEM);
2103         }
2104
2105         /* populate pages with key/record pairs */
2106         rc = dt_index_read(info->mti_env, mdt->mdt_bottom, rep_ii, rdpg);
2107         if (rc < 0)
2108                 GOTO(out, rc);
2109
2110         LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
2111                  "asked %d > %d\n", rc, rdpg->rp_count);
2112
2113         /* send pages to client */
2114         rc = mdt_sendpage(info, rdpg, rc);
2115
2116         GOTO(out, rc);
2117 out:
2118         if (rdpg->rp_pages) {
2119                 for (i = 0; i < rdpg->rp_npages; i++)
2120                         if (rdpg->rp_pages[i])
2121                                 cfs_free_page(rdpg->rp_pages[i]);
2122                 OBD_FREE(rdpg->rp_pages,
2123                          rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
2124         }
2125         return rc;
2126 }
2127
2128 static int mdt_obd_log_cancel(struct mdt_thread_info *info)
2129 {
2130         return err_serious(-EOPNOTSUPP);
2131 }
2132
2133 static int mdt_obd_qc_callback(struct mdt_thread_info *info)
2134 {
2135         return err_serious(-EOPNOTSUPP);
2136 }
2137
2138
2139 /*
2140  * LLOG handlers.
2141  */
2142
2143 /** clone llog ctxt from child (mdd)
2144  * This allows remote llog (replicator) access.
2145  * We can either pass all llog RPCs (eg mdt_llog_create) on to child where the
2146  * context was originally set up, or we can handle them directly.
2147  * I choose the latter, but that means I need any llog
2148  * contexts set up by child to be accessable by the mdt.  So we clone the
2149  * context into our context list here.
2150  */
2151 static int mdt_llog_ctxt_clone(const struct lu_env *env, struct mdt_device *mdt,
2152                                int idx)
2153 {
2154         struct md_device  *next = mdt->mdt_child;
2155         struct llog_ctxt *ctxt;
2156         int rc;
2157
2158         if (!llog_ctxt_null(mdt2obd_dev(mdt), idx))
2159                 return 0;
2160
2161         rc = next->md_ops->mdo_llog_ctxt_get(env, next, idx, (void **)&ctxt);
2162         if (rc || ctxt == NULL) {
2163                 return 0;
2164         }
2165
2166         rc = llog_group_set_ctxt(&mdt2obd_dev(mdt)->obd_olg, ctxt, idx);
2167         if (rc)
2168                 CERROR("Can't set mdt ctxt %d\n", rc);
2169
2170         return rc;
2171 }
2172
2173 static int mdt_llog_ctxt_unclone(const struct lu_env *env,
2174                                  struct mdt_device *mdt, int idx)
2175 {
2176         struct llog_ctxt *ctxt;
2177
2178         ctxt = llog_get_context(mdt2obd_dev(mdt), idx);
2179         if (ctxt == NULL)
2180                 return 0;
2181         /* Put once for the get we just did, and once for the clone */
2182         llog_ctxt_put(ctxt);
2183         llog_ctxt_put(ctxt);
2184         return 0;
2185 }
2186
2187 static int mdt_llog_create(struct mdt_thread_info *info)
2188 {
2189         int rc;
2190
2191         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
2192         rc = llog_origin_handle_open(mdt_info_req(info));
2193         return (rc < 0 ? err_serious(rc) : rc);
2194 }
2195
2196 static int mdt_llog_destroy(struct mdt_thread_info *info)
2197 {
2198         int rc;
2199
2200         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_DESTROY);
2201         rc = llog_origin_handle_destroy(mdt_info_req(info));
2202         return (rc < 0 ? err_serious(rc) : rc);
2203 }
2204
2205 static int mdt_llog_read_header(struct mdt_thread_info *info)
2206 {
2207         int rc;
2208
2209         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2210         rc = llog_origin_handle_read_header(mdt_info_req(info));
2211         return (rc < 0 ? err_serious(rc) : rc);
2212 }
2213
2214 static int mdt_llog_next_block(struct mdt_thread_info *info)
2215 {
2216         int rc;
2217
2218         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
2219         rc = llog_origin_handle_next_block(mdt_info_req(info));
2220         return (rc < 0 ? err_serious(rc) : rc);
2221 }
2222
2223 static int mdt_llog_prev_block(struct mdt_thread_info *info)
2224 {
2225         int rc;
2226
2227         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
2228         rc = llog_origin_handle_prev_block(mdt_info_req(info));
2229         return (rc < 0 ? err_serious(rc) : rc);
2230 }
2231
2232
2233 /*
2234  * DLM handlers.
2235  */
2236 static struct ldlm_callback_suite cbs = {
2237         .lcs_completion = ldlm_server_completion_ast,
2238         .lcs_blocking   = ldlm_server_blocking_ast,
2239         .lcs_glimpse    = ldlm_server_glimpse_ast
2240 };
2241
2242 static int mdt_enqueue(struct mdt_thread_info *info)
2243 {
2244         struct ptlrpc_request *req;
2245         int rc;
2246
2247         /*
2248          * info->mti_dlm_req already contains swapped and (if necessary)
2249          * converted dlm request.
2250          */
2251         LASSERT(info->mti_dlm_req != NULL);
2252
2253         req = mdt_info_req(info);
2254         rc = ldlm_handle_enqueue0(info->mti_mdt->mdt_namespace,
2255                                   req, info->mti_dlm_req, &cbs);
2256         info->mti_fail_id = OBD_FAIL_LDLM_REPLY;
2257         return rc ? err_serious(rc) : req->rq_status;
2258 }
2259
2260 static int mdt_convert(struct mdt_thread_info *info)
2261 {
2262         int rc;
2263         struct ptlrpc_request *req;
2264
2265         LASSERT(info->mti_dlm_req);
2266         req = mdt_info_req(info);
2267         rc = ldlm_handle_convert0(req, info->mti_dlm_req);
2268         return rc ? err_serious(rc) : req->rq_status;
2269 }
2270
2271 static int mdt_bl_callback(struct mdt_thread_info *info)
2272 {
2273         CERROR("bl callbacks should not happen on MDS\n");
2274         LBUG();
2275         return err_serious(-EOPNOTSUPP);
2276 }
2277
2278 static int mdt_cp_callback(struct mdt_thread_info *info)
2279 {
2280         CERROR("cp callbacks should not happen on MDS\n");
2281         LBUG();
2282         return err_serious(-EOPNOTSUPP);
2283 }
2284
2285 /*
2286  * sec context handlers
2287  */
2288 static int mdt_sec_ctx_handle(struct mdt_thread_info *info)
2289 {
2290         int rc;
2291
2292         rc = mdt_handle_idmap(info);
2293
2294         if (unlikely(rc)) {
2295                 struct ptlrpc_request *req = mdt_info_req(info);
2296                 __u32                  opc;
2297
2298                 opc = lustre_msg_get_opc(req->rq_reqmsg);
2299                 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT)
2300                         sptlrpc_svc_ctx_invalidate(req);
2301         }
2302
2303         CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
2304
2305         return rc;
2306 }
2307
2308 /*
2309  * quota request handlers
2310  */
2311 static int mdt_quota_dqacq(struct mdt_thread_info *info)
2312 {
2313         struct lu_device        *qmt = info->mti_mdt->mdt_qmt_dev;
2314         int                      rc;
2315         ENTRY;
2316
2317         if (qmt == NULL)
2318                 RETURN(err_serious(-EOPNOTSUPP));
2319
2320         rc = qmt_hdls.qmth_dqacq(info->mti_env, qmt, mdt_info_req(info));
2321         RETURN(rc);
2322 }
2323
2324 static struct mdt_object *mdt_obj(struct lu_object *o)
2325 {
2326         LASSERT(lu_device_is_mdt(o->lo_dev));
2327         return container_of0(o, struct mdt_object, mot_obj.mo_lu);
2328 }
2329
2330 struct mdt_object *mdt_object_new(const struct lu_env *env,
2331                                   struct mdt_device *d,
2332                                   const struct lu_fid *f)
2333 {
2334         struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2335         struct lu_object *o;
2336         struct mdt_object *m;
2337         ENTRY;
2338
2339         CDEBUG(D_INFO, "Allocate object for "DFID"\n", PFID(f));
2340         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, &conf);
2341         if (unlikely(IS_ERR(o)))
2342                 m = (struct mdt_object *)o;
2343         else
2344                 m = mdt_obj(o);
2345         RETURN(m);
2346 }
2347
2348 struct mdt_object *mdt_object_find(const struct lu_env *env,
2349                                    struct mdt_device *d,
2350                                    const struct lu_fid *f)
2351 {
2352         struct lu_object *o;
2353         struct mdt_object *m;
2354         ENTRY;
2355
2356         CDEBUG(D_INFO, "Find object for "DFID"\n", PFID(f));
2357         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, NULL);
2358         if (unlikely(IS_ERR(o)))
2359                 m = (struct mdt_object *)o;
2360         else
2361                 m = mdt_obj(o);
2362         RETURN(m);
2363 }
2364
2365 /**
2366  * Asyncronous commit for mdt device.
2367  *
2368  * Pass asynchonous commit call down the MDS stack.
2369  *
2370  * \param env environment
2371  * \param mdt the mdt device
2372  */
2373 static void mdt_device_commit_async(const struct lu_env *env,
2374                                     struct mdt_device *mdt)
2375 {
2376         struct dt_device *dt = mdt->mdt_bottom;
2377         int rc;
2378
2379         rc = dt->dd_ops->dt_commit_async(env, dt);
2380         if (unlikely(rc != 0))
2381                 CWARN("async commit start failed with rc = %d", rc);
2382 }
2383
2384 /**
2385  * Mark the lock as "synchonous".
2386  *
2387  * Mark the lock to deffer transaction commit to the unlock time.
2388  *
2389  * \param lock the lock to mark as "synchonous"
2390  *
2391  * \see mdt_is_lock_sync
2392  * \see mdt_save_lock
2393  */
2394 static inline void mdt_set_lock_sync(struct ldlm_lock *lock)
2395 {
2396         lock->l_ast_data = (void*)1;
2397 }
2398
2399 /**
2400  * Check whehter the lock "synchonous" or not.
2401  *
2402  * \param lock the lock to check
2403  * \retval 1 the lock is "synchonous"
2404  * \retval 0 the lock isn't "synchronous"
2405  *
2406  * \see mdt_set_lock_sync
2407  * \see mdt_save_lock
2408  */
2409 static inline int mdt_is_lock_sync(struct ldlm_lock *lock)
2410 {
2411         return lock->l_ast_data != NULL;
2412 }
2413
2414 /**
2415  * Blocking AST for mdt locks.
2416  *
2417  * Starts transaction commit if in case of COS lock conflict or
2418  * deffers such a commit to the mdt_save_lock.
2419  *
2420  * \param lock the lock which blocks a request or cancelling lock
2421  * \param desc unused
2422  * \param data unused
2423  * \param flag indicates whether this cancelling or blocking callback
2424  * \retval 0
2425  * \see ldlm_blocking_ast_nocheck
2426  */
2427 int mdt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2428                      void *data, int flag)
2429 {
2430         struct obd_device *obd = ldlm_lock_to_ns(lock)->ns_obd;
2431         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
2432         int rc;
2433         ENTRY;
2434
2435         if (flag == LDLM_CB_CANCELING)
2436                 RETURN(0);
2437         lock_res_and_lock(lock);
2438         if (lock->l_blocking_ast != mdt_blocking_ast) {
2439                 unlock_res_and_lock(lock);
2440                 RETURN(0);
2441         }
2442         if (mdt_cos_is_enabled(mdt) &&
2443             lock->l_req_mode & (LCK_PW | LCK_EX) &&
2444             lock->l_blocking_lock != NULL &&
2445             lock->l_client_cookie != lock->l_blocking_lock->l_client_cookie) {
2446                 mdt_set_lock_sync(lock);
2447         }
2448         rc = ldlm_blocking_ast_nocheck(lock);
2449
2450         /* There is no lock conflict if l_blocking_lock == NULL,
2451          * it indicates a blocking ast sent from ldlm_lock_decref_internal
2452          * when the last reference to a local lock was released */
2453         if (lock->l_req_mode == LCK_COS && lock->l_blocking_lock != NULL) {
2454                 struct lu_env env;
2455
2456                 rc = lu_env_init(&env, LCT_LOCAL);
2457                 if (unlikely(rc != 0))
2458                         CWARN("lu_env initialization failed with rc = %d,"
2459                               "cannot start asynchronous commit\n", rc);
2460                 else
2461                         mdt_device_commit_async(&env, mdt);
2462                 lu_env_fini(&env);
2463         }
2464         RETURN(rc);
2465 }
2466
2467 int mdt_object_lock(struct mdt_thread_info *info, struct mdt_object *o,
2468                     struct mdt_lock_handle *lh, __u64 ibits, int locality)
2469 {
2470         struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
2471         ldlm_policy_data_t *policy = &info->mti_policy;
2472         struct ldlm_res_id *res_id = &info->mti_res_id;
2473         int rc;
2474         ENTRY;
2475
2476         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2477         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2478         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
2479         LASSERT(lh->mlh_type != MDT_NUL_LOCK);
2480
2481         if (mdt_object_exists(o) < 0) {
2482                 if (locality == MDT_CROSS_LOCK) {
2483                         /* cross-ref object fix */
2484                         ibits &= ~MDS_INODELOCK_UPDATE;
2485                         ibits |= MDS_INODELOCK_LOOKUP;
2486                 } else {
2487                         LASSERT(!(ibits & MDS_INODELOCK_UPDATE));
2488                         LASSERT(ibits & MDS_INODELOCK_LOOKUP);
2489                 }
2490                 /* No PDO lock on remote object */
2491                 LASSERT(lh->mlh_type != MDT_PDO_LOCK);
2492         }
2493
2494         if (lh->mlh_type == MDT_PDO_LOCK) {
2495                 /* check for exists after object is locked */
2496                 if (mdt_object_exists(o) == 0) {
2497                         /* Non-existent object shouldn't have PDO lock */
2498                         RETURN(-ESTALE);
2499                 } else {
2500                         /* Non-dir object shouldn't have PDO lock */
2501                         if (!S_ISDIR(lu_object_attr(&o->mot_obj.mo_lu)))
2502                                 RETURN(-ENOTDIR);
2503                 }
2504         }
2505
2506         memset(policy, 0, sizeof(*policy));
2507         fid_build_reg_res_name(mdt_object_fid(o), res_id);
2508
2509         /*
2510          * Take PDO lock on whole directory and build correct @res_id for lock
2511          * on part of directory.
2512          */
2513         if (lh->mlh_pdo_hash != 0) {
2514                 LASSERT(lh->mlh_type == MDT_PDO_LOCK);
2515                 mdt_lock_pdo_mode(info, o, lh);
2516                 if (lh->mlh_pdo_mode != LCK_NL) {
2517                         /*
2518                          * Do not use LDLM_FL_LOCAL_ONLY for parallel lock, it
2519                          * is never going to be sent to client and we do not
2520                          * want it slowed down due to possible cancels.
2521                          */
2522                         policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
2523                         rc = mdt_fid_lock(ns, &lh->mlh_pdo_lh, lh->mlh_pdo_mode,
2524                                           policy, res_id, LDLM_FL_ATOMIC_CB,
2525                                           &info->mti_exp->exp_handle.h_cookie);
2526                         if (unlikely(rc))
2527                                 RETURN(rc);
2528                 }
2529
2530                 /*
2531                  * Finish res_id initializing by name hash marking part of
2532                  * directory which is taking modification.
2533                  */
2534                 res_id->name[LUSTRE_RES_ID_HSH_OFF] = lh->mlh_pdo_hash;
2535         }
2536
2537         policy->l_inodebits.bits = ibits;
2538
2539         /*
2540          * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
2541          * going to be sent to client. If it is - mdt_intent_policy() path will
2542          * fix it up and turn FL_LOCAL flag off.
2543          */
2544         rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy,
2545                           res_id, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB,
2546                           &info->mti_exp->exp_handle.h_cookie);
2547         if (rc)
2548                 mdt_object_unlock(info, o, lh, 1);
2549         else if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_MDS_PDO_LOCK)) &&
2550                  lh->mlh_pdo_hash != 0 &&
2551                  (lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX)) {
2552                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK, 15);
2553         }
2554
2555         RETURN(rc);
2556 }
2557
2558 /**
2559  * Save a lock within request object.
2560  *
2561  * Keep the lock referenced until whether client ACK or transaction
2562  * commit happens or release the lock immediately depending on input
2563  * parameters. If COS is ON, a write lock is converted to COS lock
2564  * before saving.
2565  *
2566  * \param info thead info object
2567  * \param h lock handle
2568  * \param mode lock mode
2569  * \param decref force immediate lock releasing
2570  */
2571 static
2572 void mdt_save_lock(struct mdt_thread_info *info, struct lustre_handle *h,
2573                    ldlm_mode_t mode, int decref)
2574 {
2575         ENTRY;
2576
2577         if (lustre_handle_is_used(h)) {
2578                 if (decref || !info->mti_has_trans ||
2579                     !(mode & (LCK_PW | LCK_EX))){
2580                         mdt_fid_unlock(h, mode);
2581                 } else {
2582                         struct mdt_device *mdt = info->mti_mdt;
2583                         struct ldlm_lock *lock = ldlm_handle2lock(h);
2584                         struct ptlrpc_request *req = mdt_info_req(info);
2585                         int no_ack = 0;
2586
2587                         LASSERTF(lock != NULL, "no lock for cookie "LPX64"\n",
2588                                  h->cookie);
2589                         CDEBUG(D_HA, "request = %p reply state = %p"
2590                                " transno = "LPD64"\n",
2591                                req, req->rq_reply_state, req->rq_transno);
2592                         if (mdt_cos_is_enabled(mdt)) {
2593                                 no_ack = 1;
2594                                 ldlm_lock_downgrade(lock, LCK_COS);
2595                                 mode = LCK_COS;
2596                         }
2597                         ptlrpc_save_lock(req, h, mode, no_ack);
2598                         if (mdt_is_lock_sync(lock)) {
2599                                 CDEBUG(D_HA, "found sync-lock,"
2600                                        " async commit started\n");
2601                                 mdt_device_commit_async(info->mti_env,
2602                                                         mdt);
2603                         }
2604                         LDLM_LOCK_PUT(lock);
2605                 }
2606                 h->cookie = 0ull;
2607         }
2608
2609         EXIT;
2610 }
2611
2612 /**
2613  * Unlock mdt object.
2614  *
2615  * Immeditely release the regular lock and the PDO lock or save the
2616  * lock in reqeuest and keep them referenced until client ACK or
2617  * transaction commit.
2618  *
2619  * \param info thread info object
2620  * \param o mdt object
2621  * \param lh mdt lock handle referencing regular and PDO locks
2622  * \param decref force immediate lock releasing
2623  */
2624 void mdt_object_unlock(struct mdt_thread_info *info, struct mdt_object *o,
2625                        struct mdt_lock_handle *lh, int decref)
2626 {
2627         ENTRY;
2628
2629         mdt_save_lock(info, &lh->mlh_pdo_lh, lh->mlh_pdo_mode, decref);
2630         mdt_save_lock(info, &lh->mlh_reg_lh, lh->mlh_reg_mode, decref);
2631
2632         EXIT;
2633 }
2634
2635 struct mdt_object *mdt_object_find_lock(struct mdt_thread_info *info,
2636                                         const struct lu_fid *f,
2637                                         struct mdt_lock_handle *lh,
2638                                         __u64 ibits)
2639 {
2640         struct mdt_object *o;
2641
2642         o = mdt_object_find(info->mti_env, info->mti_mdt, f);
2643         if (!IS_ERR(o)) {
2644                 int rc;
2645
2646                 rc = mdt_object_lock(info, o, lh, ibits,
2647                                      MDT_LOCAL_LOCK);
2648                 if (rc != 0) {
2649                         mdt_object_put(info->mti_env, o);
2650                         o = ERR_PTR(rc);
2651                 }
2652         }
2653         return o;
2654 }
2655
2656 void mdt_object_unlock_put(struct mdt_thread_info * info,
2657                            struct mdt_object * o,
2658                            struct mdt_lock_handle *lh,
2659                            int decref)
2660 {
2661         mdt_object_unlock(info, o, lh, decref);
2662         mdt_object_put(info->mti_env, o);
2663 }
2664
2665 static struct mdt_handler *mdt_handler_find(__u32 opc,
2666                                             struct mdt_opc_slice *supported)
2667 {
2668         struct mdt_opc_slice *s;
2669         struct mdt_handler   *h;
2670
2671         h = NULL;
2672         for (s = supported; s->mos_hs != NULL; s++) {
2673                 if (s->mos_opc_start <= opc && opc < s->mos_opc_end) {
2674                         h = s->mos_hs + (opc - s->mos_opc_start);
2675                         if (likely(h->mh_opc != 0))
2676                                 LASSERTF(h->mh_opc == opc,
2677                                          "opcode mismatch %d != %d\n",
2678                                          h->mh_opc, opc);
2679                         else
2680                                 h = NULL; /* unsupported opc */
2681                         break;
2682                 }
2683         }
2684         return h;
2685 }
2686
2687 static int mdt_lock_resname_compat(struct mdt_device *m,
2688                                    struct ldlm_request *req)
2689 {
2690         /* XXX something... later. */
2691         return 0;
2692 }
2693
2694 static int mdt_lock_reply_compat(struct mdt_device *m, struct ldlm_reply *rep)
2695 {
2696         /* XXX something... later. */
2697         return 0;
2698 }
2699
2700 /*
2701  * Generic code handling requests that have struct mdt_body passed in:
2702  *
2703  *  - extract mdt_body from request and save it in @info, if present;
2704  *
2705  *  - create lu_object, corresponding to the fid in mdt_body, and save it in
2706  *  @info;
2707  *
2708  *  - if HABEO_CORPUS flag is set for this request type check whether object
2709  *  actually exists on storage (lu_object_exists()).
2710  *
2711  */
2712 static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
2713 {
2714         const struct mdt_body    *body;
2715         struct mdt_object        *obj;
2716         const struct lu_env      *env;
2717         struct req_capsule       *pill;
2718         int                       rc;
2719         ENTRY;
2720
2721         env = info->mti_env;
2722         pill = info->mti_pill;
2723
2724         body = info->mti_body = req_capsule_client_get(pill, &RMF_MDT_BODY);
2725         if (body == NULL)
2726                 RETURN(-EFAULT);
2727
2728         if (!(body->valid & OBD_MD_FLID))
2729                 RETURN(0);
2730
2731         if (!fid_is_sane(&body->fid1)) {
2732                 CERROR("Invalid fid: "DFID"\n", PFID(&body->fid1));
2733                 RETURN(-EINVAL);
2734         }
2735
2736         /*
2737          * Do not get size or any capa fields before we check that request
2738          * contains capa actually. There are some requests which do not, for
2739          * instance MDS_IS_SUBDIR.
2740          */
2741         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
2742             req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
2743                 mdt_set_capainfo(info, 0, &body->fid1,
2744                                  req_capsule_client_get(pill, &RMF_CAPA1));
2745
2746         obj = mdt_object_find(env, info->mti_mdt, &body->fid1);
2747         if (!IS_ERR(obj)) {
2748                 if ((flags & HABEO_CORPUS) &&
2749                     !mdt_object_exists(obj)) {
2750                         mdt_object_put(env, obj);
2751                         /* for capability renew ENOENT will be handled in
2752                          * mdt_renew_capa */
2753                         if (body->valid & OBD_MD_FLOSSCAPA)
2754                                 rc = 0;
2755                         else
2756                                 rc = -ENOENT;
2757                 } else {
2758                         info->mti_object = obj;
2759                         rc = 0;
2760                 }
2761         } else
2762                 rc = PTR_ERR(obj);
2763
2764         RETURN(rc);
2765 }
2766
2767 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags)
2768 {
2769         struct req_capsule *pill = info->mti_pill;
2770         int rc;
2771         ENTRY;
2772
2773         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT))
2774                 rc = mdt_body_unpack(info, flags);
2775         else
2776                 rc = 0;
2777
2778         if (rc == 0 && (flags & HABEO_REFERO)) {
2779                 /* Pack reply. */
2780                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
2781                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
2782                                              info->mti_body->eadatasize);
2783                 if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
2784                         req_capsule_set_size(pill, &RMF_LOGCOOKIES,
2785                                              RCL_SERVER, 0);
2786
2787                 rc = req_capsule_server_pack(pill);
2788         }
2789         RETURN(rc);
2790 }
2791
2792 static int mdt_init_capa_ctxt(const struct lu_env *env, struct mdt_device *m)
2793 {
2794         struct md_device *next = m->mdt_child;
2795
2796         return next->md_ops->mdo_init_capa_ctxt(env, next,
2797                                                 m->mdt_opts.mo_mds_capa,
2798                                                 m->mdt_capa_timeout,
2799                                                 m->mdt_capa_alg,
2800                                                 m->mdt_capa_keys);
2801 }
2802
2803 /*
2804  * Invoke handler for this request opc. Also do necessary preprocessing
2805  * (according to handler ->mh_flags), and post-processing (setting of
2806  * ->last_{xid,committed}).
2807  */
2808 static int mdt_req_handle(struct mdt_thread_info *info,
2809                           struct mdt_handler *h, struct ptlrpc_request *req)
2810 {
2811         int   rc, serious = 0;
2812         __u32 flags;
2813
2814         ENTRY;
2815
2816         LASSERT(h->mh_act != NULL);
2817         LASSERT(h->mh_opc == lustre_msg_get_opc(req->rq_reqmsg));
2818         LASSERT(current->journal_info == NULL);
2819
2820         /*
2821          * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
2822          * to put same checks into handlers like mdt_close(), mdt_reint(),
2823          * etc., without talking to mdt authors first. Checking same thing
2824          * there again is useless and returning 0 error without packing reply
2825          * is buggy! Handlers either pack reply or return error.
2826          *
2827          * We return 0 here and do not send any reply in order to emulate
2828          * network failure. Do not send any reply in case any of NET related
2829          * fail_id has occured.
2830          */
2831         if (OBD_FAIL_CHECK_ORSET(h->mh_fail_id, OBD_FAIL_ONCE))
2832                 RETURN(0);
2833
2834         rc = 0;
2835         flags = h->mh_flags;
2836         LASSERT(ergo(flags & (HABEO_CORPUS|HABEO_REFERO), h->mh_fmt != NULL));
2837
2838         if (h->mh_fmt != NULL) {
2839                 req_capsule_set(info->mti_pill, h->mh_fmt);
2840                 rc = mdt_unpack_req_pack_rep(info, flags);
2841         }
2842
2843         if (rc == 0 && flags & MUTABOR &&
2844             req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
2845                 /* should it be rq_status? */
2846                 rc = -EROFS;
2847
2848         if (rc == 0 && flags & HABEO_CLAVIS) {
2849                 struct ldlm_request *dlm_req;
2850
2851                 LASSERT(h->mh_fmt != NULL);
2852
2853                 dlm_req = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
2854                 if (dlm_req != NULL) {
2855                         if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
2856                                         LDLM_IBITS &&
2857                                      dlm_req->lock_desc.l_policy_data.\
2858                                         l_inodebits.bits == 0)) {
2859                                 /*
2860                                  * Lock without inodebits makes no sense and
2861                                  * will oops later in ldlm. If client miss to
2862                                  * set such bits, do not trigger ASSERTION.
2863                                  *
2864                                  * For liblustre flock case, it maybe zero.
2865                                  */
2866                                 rc = -EPROTO;
2867                         } else {
2868                                 if (info->mti_mdt->mdt_opts.mo_compat_resname)
2869                                         rc = mdt_lock_resname_compat(
2870                                                                 info->mti_mdt,
2871                                                                 dlm_req);
2872                                 info->mti_dlm_req = dlm_req;
2873                         }
2874                 } else {
2875                         rc = -EFAULT;
2876                 }
2877         }
2878
2879         /* capability setting changed via /proc, needs reinitialize ctxt */
2880         if (info->mti_mdt && info->mti_mdt->mdt_capa_conf) {
2881                 mdt_init_capa_ctxt(info->mti_env, info->mti_mdt);
2882                 info->mti_mdt->mdt_capa_conf = 0;
2883         }
2884
2885         if (likely(rc == 0)) {
2886                 /*
2887                  * Process request, there can be two types of rc:
2888                  * 1) errors with msg unpack/pack, other failures outside the
2889                  * operation itself. This is counted as serious errors;
2890                  * 2) errors during fs operation, should be placed in rq_status
2891                  * only
2892                  */
2893                 rc = h->mh_act(info);
2894                 if (rc == 0 &&
2895                     !req->rq_no_reply && req->rq_reply_state == NULL) {
2896                         DEBUG_REQ(D_ERROR, req, "MDT \"handler\" %s did not "
2897                                   "pack reply and returned 0 error\n",
2898                                   h->mh_name);
2899                         LBUG();
2900                 }
2901                 serious = is_serious(rc);
2902                 rc = clear_serious(rc);
2903         } else
2904                 serious = 1;
2905
2906         req->rq_status = rc;
2907
2908         /*
2909          * ELDLM_* codes which > 0 should be in rq_status only as well as
2910          * all non-serious errors.
2911          */
2912         if (rc > 0 || !serious)
2913                 rc = 0;
2914
2915         LASSERT(current->journal_info == NULL);
2916
2917         if (rc == 0 && (flags & HABEO_CLAVIS) &&
2918             info->mti_mdt->mdt_opts.mo_compat_resname) {
2919                 struct ldlm_reply *dlmrep;
2920
2921                 dlmrep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
2922                 if (dlmrep != NULL)
2923                         rc = mdt_lock_reply_compat(info->mti_mdt, dlmrep);
2924         }
2925
2926         /* If we're DISCONNECTing, the mdt_export_data is already freed */
2927         if (likely(rc == 0 && req->rq_export && h->mh_opc != MDS_DISCONNECT))
2928                 target_committed_to_req(req);
2929
2930         if (unlikely(req_is_replay(req) &&
2931                      lustre_msg_get_transno(req->rq_reqmsg) == 0)) {
2932                 DEBUG_REQ(D_ERROR, req, "transno is 0 during REPLAY");
2933                 LBUG();
2934         }
2935
2936         target_send_reply(req, rc, info->mti_fail_id);
2937         RETURN(0);
2938 }
2939
2940 void mdt_lock_handle_init(struct mdt_lock_handle *lh)
2941 {
2942         lh->mlh_type = MDT_NUL_LOCK;
2943         lh->mlh_reg_lh.cookie = 0ull;
2944         lh->mlh_reg_mode = LCK_MINMODE;
2945         lh->mlh_pdo_lh.cookie = 0ull;
2946         lh->mlh_pdo_mode = LCK_MINMODE;
2947 }
2948
2949 void mdt_lock_handle_fini(struct mdt_lock_handle *lh)
2950 {
2951         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2952         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2953 }
2954
2955 /*
2956  * Initialize fields of struct mdt_thread_info. Other fields are left in
2957  * uninitialized state, because it's too expensive to zero out whole
2958  * mdt_thread_info (> 1K) on each request arrival.
2959  */
2960 static void mdt_thread_info_init(struct ptlrpc_request *req,
2961                                  struct mdt_thread_info *info)
2962 {
2963         int i;
2964         struct md_capainfo *ci;
2965
2966         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2967         info->mti_pill = &req->rq_pill;
2968
2969         /* lock handle */
2970         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
2971                 mdt_lock_handle_init(&info->mti_lh[i]);
2972
2973         /* mdt device: it can be NULL while CONNECT */
2974         if (req->rq_export) {
2975                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
2976                 info->mti_exp = req->rq_export;
2977         } else
2978                 info->mti_mdt = NULL;
2979         info->mti_env = req->rq_svc_thread->t_env;
2980         ci = md_capainfo(info->mti_env);
2981         memset(ci, 0, sizeof *ci);
2982         if (req->rq_export) {
2983                 if (exp_connect_rmtclient(req->rq_export))
2984                         ci->mc_auth = LC_ID_CONVERT;
2985                 else if (req->rq_export->exp_connect_flags &
2986                          OBD_CONNECT_MDS_CAPA)
2987                         ci->mc_auth = LC_ID_PLAIN;
2988                 else
2989                         ci->mc_auth = LC_ID_NONE;
2990         }
2991
2992         info->mti_fail_id = OBD_FAIL_MDS_ALL_REPLY_NET;
2993         info->mti_transno = lustre_msg_get_transno(req->rq_reqmsg);
2994         info->mti_mos = NULL;
2995
2996         memset(&info->mti_attr, 0, sizeof(info->mti_attr));
2997         info->mti_body = NULL;
2998         info->mti_object = NULL;
2999         info->mti_dlm_req = NULL;
3000         info->mti_has_trans = 0;
3001         info->mti_cross_ref = 0;
3002         info->mti_opdata = 0;
3003         info->mti_big_lmm_used = 0;
3004
3005         /* To not check for split by default. */
3006         info->mti_spec.no_create = 0;
3007 }
3008
3009 static void mdt_thread_info_fini(struct mdt_thread_info *info)
3010 {
3011         int i;
3012
3013         req_capsule_fini(info->mti_pill);
3014         if (info->mti_object != NULL) {
3015                 mdt_object_put(info->mti_env, info->mti_object);
3016                 info->mti_object = NULL;
3017         }
3018         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
3019                 mdt_lock_handle_fini(&info->mti_lh[i]);
3020         info->mti_env = NULL;
3021 }
3022
3023 static int mdt_filter_recovery_request(struct ptlrpc_request *req,
3024                                        struct obd_device *obd, int *process)
3025 {
3026         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3027         case MDS_CONNECT: /* This will never get here, but for completeness. */
3028         case OST_CONNECT: /* This will never get here, but for completeness. */
3029         case MDS_DISCONNECT:
3030         case OST_DISCONNECT:
3031         case OBD_IDX_READ:
3032                *process = 1;
3033                RETURN(0);
3034
3035         case MDS_CLOSE:
3036         case MDS_DONE_WRITING:
3037         case MDS_SYNC: /* used in unmounting */
3038         case OBD_PING:
3039         case MDS_REINT:
3040         case SEQ_QUERY:
3041         case FLD_QUERY:
3042         case LDLM_ENQUEUE:
3043                 *process = target_queue_recovery_request(req, obd);
3044                 RETURN(0);
3045
3046         default:
3047                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
3048                 *process = -EAGAIN;
3049                 RETURN(0);
3050         }
3051 }
3052
3053 /*
3054  * Handle recovery. Return:
3055  *        +1: continue request processing;
3056  *       -ve: abort immediately with the given error code;
3057  *         0: send reply with error code in req->rq_status;
3058  */
3059 static int mdt_recovery(struct mdt_thread_info *info)
3060 {
3061         struct ptlrpc_request *req = mdt_info_req(info);
3062         struct obd_device *obd;
3063
3064         ENTRY;
3065
3066         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3067         case MDS_CONNECT:
3068         case SEC_CTX_INIT:
3069         case SEC_CTX_INIT_CONT:
3070         case SEC_CTX_FINI:
3071                 {
3072 #if 0
3073                         int rc;
3074
3075                         rc = mdt_handle_idmap(info);
3076                         if (rc)
3077                                 RETURN(rc);
3078                         else
3079 #endif
3080                                 RETURN(+1);
3081                 }
3082         }
3083
3084         if (unlikely(!class_connected_export(req->rq_export))) {
3085                 CERROR("operation %d on unconnected MDS from %s\n",
3086                        lustre_msg_get_opc(req->rq_reqmsg),
3087                        libcfs_id2str(req->rq_peer));
3088                 /* FIXME: For CMD cleanup, when mds_B stop, the req from
3089                  * mds_A will get -ENOTCONN(especially for ping req),
3090                  * which will cause that mds_A deactive timeout, then when
3091                  * mds_A cleanup, the cleanup process will be suspended since
3092                  * deactive timeout is not zero.
3093                  */
3094                 req->rq_status = -ENOTCONN;
3095                 target_send_reply(req, -ENOTCONN, info->mti_fail_id);
3096                 RETURN(0);
3097         }
3098
3099         /* sanity check: if the xid matches, the request must be marked as a
3100          * resent or replayed */
3101         if (req_xid_is_last(req)) {
3102                 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
3103                       (MSG_RESENT | MSG_REPLAY))) {
3104                         DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches last_xid, "
3105                                   "expected REPLAY or RESENT flag (%x)", req->rq_xid,
3106                                   lustre_msg_get_flags(req->rq_reqmsg));
3107                         LBUG();
3108                         req->rq_status = -ENOTCONN;
3109                         RETURN(-ENOTCONN);
3110                 }
3111         }
3112
3113         /* else: note the opposite is not always true; a RESENT req after a
3114          * failover will usually not match the last_xid, since it was likely
3115          * never committed. A REPLAYed request will almost never match the
3116          * last xid, however it could for a committed, but still retained,
3117          * open. */
3118
3119         obd = req->rq_export->exp_obd;
3120
3121         /* Check for aborted recovery... */
3122         if (unlikely(obd->obd_recovering)) {
3123                 int rc;
3124                 int should_process;
3125                 DEBUG_REQ(D_INFO, req, "Got new replay");
3126                 rc = mdt_filter_recovery_request(req, obd, &should_process);
3127                 if (rc != 0 || !should_process)
3128                         RETURN(rc);
3129                 else if (should_process < 0) {
3130                         req->rq_status = should_process;
3131                         rc = ptlrpc_error(req);
3132                         RETURN(rc);
3133                 }
3134         }
3135         RETURN(+1);
3136 }
3137
3138 static int mdt_msg_check_version(struct lustre_msg *msg)
3139 {
3140         int rc;
3141
3142         switch (lustre_msg_get_opc(msg)) {
3143         case MDS_CONNECT:
3144         case MDS_DISCONNECT:
3145         case OBD_PING:
3146         case SEC_CTX_INIT:
3147         case SEC_CTX_INIT_CONT:
3148         case SEC_CTX_FINI:
3149         case OBD_IDX_READ:
3150                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
3151                 if (rc)
3152                         CERROR("bad opc %u version %08x, expecting %08x\n",
3153                                lustre_msg_get_opc(msg),
3154                                lustre_msg_get_version(msg),
3155                                LUSTRE_OBD_VERSION);
3156                 break;
3157         case MDS_GETSTATUS:
3158         case MDS_GETATTR:
3159         case MDS_GETATTR_NAME:
3160         case MDS_STATFS:
3161         case MDS_READPAGE:
3162         case MDS_WRITEPAGE:
3163         case MDS_IS_SUBDIR:
3164         case MDS_REINT:
3165         case MDS_CLOSE:
3166         case MDS_DONE_WRITING:
3167         case MDS_PIN:
3168         case MDS_SYNC:
3169         case MDS_GETXATTR:
3170         case MDS_SETXATTR:
3171         case MDS_SET_INFO:
3172         case MDS_GET_INFO:
3173         case MDS_QUOTACHECK:
3174         case MDS_QUOTACTL:
3175         case QUOTA_DQACQ:
3176         case QUOTA_DQREL:
3177         case SEQ_QUERY:
3178         case FLD_QUERY:
3179                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
3180                 if (rc)
3181                         CERROR("bad opc %u version %08x, expecting %08x\n",
3182                                lustre_msg_get_opc(msg),
3183                                lustre_msg_get_version(msg),
3184                                LUSTRE_MDS_VERSION);
3185                 break;
3186         case LDLM_ENQUEUE:
3187         case LDLM_CONVERT:
3188         case LDLM_BL_CALLBACK:
3189         case LDLM_CP_CALLBACK:
3190                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
3191                 if (rc)
3192                         CERROR("bad opc %u version %08x, expecting %08x\n",
3193                                lustre_msg_get_opc(msg),
3194                                lustre_msg_get_version(msg),
3195                                LUSTRE_DLM_VERSION);
3196                 break;
3197         case OBD_LOG_CANCEL:
3198         case LLOG_ORIGIN_HANDLE_CREATE:
3199         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
3200         case LLOG_ORIGIN_HANDLE_READ_HEADER:
3201         case LLOG_ORIGIN_HANDLE_CLOSE:
3202         case LLOG_ORIGIN_HANDLE_DESTROY:
3203         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
3204         case LLOG_CATINFO:
3205                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
3206                 if (rc)
3207                         CERROR("bad opc %u version %08x, expecting %08x\n",
3208                                lustre_msg_get_opc(msg),
3209                                lustre_msg_get_version(msg),
3210                                LUSTRE_LOG_VERSION);
3211                 break;
3212         default:
3213                 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
3214                 rc = -ENOTSUPP;
3215         }
3216         return rc;
3217 }
3218
3219 static int mdt_handle0(struct ptlrpc_request *req,
3220                        struct mdt_thread_info *info,
3221                        struct mdt_opc_slice *supported)
3222 {
3223         struct mdt_handler *h;
3224         struct lustre_msg  *msg;
3225         int                 rc;
3226
3227         ENTRY;
3228
3229         if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_MDS_ALL_REQUEST_NET, OBD_FAIL_ONCE))
3230                 RETURN(0);
3231
3232         LASSERT(current->journal_info == NULL);
3233
3234         msg = req->rq_reqmsg;
3235         rc = mdt_msg_check_version(msg);
3236         if (likely(rc == 0)) {
3237                 rc = mdt_recovery(info);
3238                 if (likely(rc == +1)) {
3239                         h = mdt_handler_find(lustre_msg_get_opc(msg),
3240                                              supported);
3241                         if (likely(h != NULL)) {
3242                                 rc = mdt_req_handle(info, h, req);
3243                         } else {
3244                                 CERROR("The unsupported opc: 0x%x\n",
3245                                        lustre_msg_get_opc(msg) );
3246                                 req->rq_status = -ENOTSUPP;
3247                                 rc = ptlrpc_error(req);
3248                                 RETURN(rc);
3249                         }
3250                 }
3251         } else
3252                 CERROR(LUSTRE_MDT_NAME" drops mal-formed request\n");
3253         RETURN(rc);
3254 }
3255
3256 /*
3257  * MDT handler function called by ptlrpc service thread when request comes.
3258  *
3259  * XXX common "target" functionality should be factored into separate module
3260  * shared by mdt, ost and stand-alone services like fld.
3261  */
3262 static int mdt_handle_common(struct ptlrpc_request *req,
3263                              struct mdt_opc_slice *supported)
3264 {
3265         struct lu_env          *env;
3266         struct mdt_thread_info *info;
3267         int                     rc;
3268         ENTRY;
3269
3270         env = req->rq_svc_thread->t_env;
3271         LASSERT(env != NULL);
3272         LASSERT(env->le_ses != NULL);
3273         LASSERT(env->le_ctx.lc_thread == req->rq_svc_thread);
3274         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
3275         LASSERT(info != NULL);
3276
3277         mdt_thread_info_init(req, info);
3278
3279         rc = mdt_handle0(req, info, supported);
3280
3281         mdt_thread_info_fini(info);
3282         RETURN(rc);
3283 }
3284
3285 /*
3286  * This is called from recovery code as handler of _all_ RPC types, FLD and SEQ
3287  * as well.
3288  */
3289 int mdt_recovery_handle(struct ptlrpc_request *req)
3290 {
3291         int rc;
3292         ENTRY;
3293
3294         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
3295         case FLD_QUERY:
3296                 rc = mdt_handle_common(req, mdt_fld_handlers);
3297                 break;
3298         case SEQ_QUERY:
3299                 rc = mdt_handle_common(req, mdt_seq_handlers);
3300                 break;
3301         default:
3302                 rc = mdt_handle_common(req, mdt_regular_handlers);
3303                 break;
3304         }
3305
3306         RETURN(rc);
3307 }
3308
3309 static int mdt_regular_handle(struct ptlrpc_request *req)
3310 {
3311         return mdt_handle_common(req, mdt_regular_handlers);
3312 }
3313
3314 static int mdt_readpage_handle(struct ptlrpc_request *req)
3315 {
3316         return mdt_handle_common(req, mdt_readpage_handlers);
3317 }
3318
3319 static int mdt_xmds_handle(struct ptlrpc_request *req)
3320 {
3321         return mdt_handle_common(req, mdt_xmds_handlers);
3322 }
3323
3324 static int mdt_mdsc_handle(struct ptlrpc_request *req)
3325 {
3326         return mdt_handle_common(req, mdt_seq_handlers);
3327 }
3328
3329 static int mdt_mdss_handle(struct ptlrpc_request *req)
3330 {
3331         return mdt_handle_common(req, mdt_seq_handlers);
3332 }
3333
3334 static int mdt_dtss_handle(struct ptlrpc_request *req)
3335 {
3336         return mdt_handle_common(req, mdt_seq_handlers);
3337 }
3338
3339 static int mdt_fld_handle(struct ptlrpc_request *req)
3340 {
3341         return mdt_handle_common(req, mdt_fld_handlers);
3342 }
3343
3344 enum mdt_it_code {
3345         MDT_IT_OPEN,
3346         MDT_IT_OCREAT,
3347         MDT_IT_CREATE,
3348         MDT_IT_GETATTR,
3349         MDT_IT_READDIR,
3350         MDT_IT_LOOKUP,
3351         MDT_IT_UNLINK,
3352         MDT_IT_TRUNC,
3353         MDT_IT_GETXATTR,
3354         MDT_IT_LAYOUT,
3355         MDT_IT_QUOTA,
3356         MDT_IT_NR
3357 };
3358
3359 static int mdt_intent_getattr(enum mdt_it_code opcode,
3360                               struct mdt_thread_info *info,
3361                               struct ldlm_lock **,
3362                               __u64);
3363 static int mdt_intent_reint(enum mdt_it_code opcode,
3364                             struct mdt_thread_info *info,
3365                             struct ldlm_lock **,
3366                             __u64);
3367
3368 static struct mdt_it_flavor {
3369         const struct req_format *it_fmt;
3370         __u32                    it_flags;
3371         int                    (*it_act)(enum mdt_it_code ,
3372                                          struct mdt_thread_info *,
3373                                          struct ldlm_lock **,
3374                                          __u64);
3375         long                     it_reint;
3376 } mdt_it_flavor[] = {
3377         [MDT_IT_OPEN]     = {
3378                 .it_fmt   = &RQF_LDLM_INTENT,
3379                 /*.it_flags = HABEO_REFERO,*/
3380                 .it_flags = 0,
3381                 .it_act   = mdt_intent_reint,
3382                 .it_reint = REINT_OPEN
3383         },
3384         [MDT_IT_OCREAT]   = {
3385                 .it_fmt   = &RQF_LDLM_INTENT,
3386                 .it_flags = MUTABOR,
3387                 .it_act   = mdt_intent_reint,
3388                 .it_reint = REINT_OPEN
3389         },
3390         [MDT_IT_CREATE]   = {
3391                 .it_fmt   = &RQF_LDLM_INTENT,
3392                 .it_flags = MUTABOR,
3393                 .it_act   = mdt_intent_reint,
3394                 .it_reint = REINT_CREATE
3395         },
3396         [MDT_IT_GETATTR]  = {
3397                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3398                 .it_flags = HABEO_REFERO,
3399                 .it_act   = mdt_intent_getattr
3400         },
3401         [MDT_IT_READDIR]  = {
3402                 .it_fmt   = NULL,
3403                 .it_flags = 0,
3404                 .it_act   = NULL
3405         },
3406         [MDT_IT_LOOKUP]   = {
3407                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3408                 .it_flags = HABEO_REFERO,
3409                 .it_act   = mdt_intent_getattr
3410         },
3411         [MDT_IT_UNLINK]   = {
3412                 .it_fmt   = &RQF_LDLM_INTENT_UNLINK,
3413                 .it_flags = MUTABOR,
3414                 .it_act   = NULL,
3415                 .it_reint = REINT_UNLINK
3416         },
3417         [MDT_IT_TRUNC]    = {
3418                 .it_fmt   = NULL,
3419                 .it_flags = MUTABOR,
3420                 .it_act   = NULL
3421         },
3422         [MDT_IT_GETXATTR] = {
3423                 .it_fmt   = NULL,
3424                 .it_flags = 0,
3425                 .it_act   = NULL
3426         },
3427         [MDT_IT_LAYOUT] = {
3428                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3429                 .it_flags = HABEO_REFERO,
3430                 .it_act   = mdt_intent_getattr
3431         }
3432 };
3433
3434 int mdt_intent_lock_replace(struct mdt_thread_info *info,
3435                             struct ldlm_lock **lockp,
3436                             struct ldlm_lock *new_lock,
3437                             struct mdt_lock_handle *lh,
3438                             __u64 flags)
3439 {
3440         struct ptlrpc_request  *req = mdt_info_req(info);
3441         struct ldlm_lock       *lock = *lockp;
3442
3443         /*
3444          * Get new lock only for cases when possible resent did not find any
3445          * lock.
3446          */
3447         if (new_lock == NULL)
3448                 new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
3449
3450         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY)) {
3451                 lh->mlh_reg_lh.cookie = 0;
3452                 RETURN(0);
3453         }
3454
3455         LASSERTF(new_lock != NULL,
3456                  "lockh "LPX64"\n", lh->mlh_reg_lh.cookie);
3457
3458         /*
3459          * If we've already given this lock to a client once, then we should
3460          * have no readers or writers.  Otherwise, we should have one reader
3461          * _or_ writer ref (which will be zeroed below) before returning the
3462          * lock to a client.
3463          */
3464         if (new_lock->l_export == req->rq_export) {
3465                 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
3466         } else {
3467                 LASSERT(new_lock->l_export == NULL);
3468                 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
3469         }
3470
3471         *lockp = new_lock;
3472
3473         if (new_lock->l_export == req->rq_export) {
3474                 /*
3475                  * Already gave this to the client, which means that we
3476                  * reconstructed a reply.
3477                  */
3478                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
3479                         MSG_RESENT);
3480                 lh->mlh_reg_lh.cookie = 0;
3481                 RETURN(ELDLM_LOCK_REPLACED);
3482         }
3483
3484         /*
3485          * Fixup the lock to be given to the client.
3486          */
3487         lock_res_and_lock(new_lock);
3488         /* Zero new_lock->l_readers and new_lock->l_writers without triggering
3489          * possible blocking AST. */
3490         while (new_lock->l_readers > 0) {
3491                 lu_ref_del(&new_lock->l_reference, "reader", new_lock);
3492                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3493                 new_lock->l_readers--;
3494         }
3495         while (new_lock->l_writers > 0) {
3496                 lu_ref_del(&new_lock->l_reference, "writer", new_lock);
3497                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3498                 new_lock->l_writers--;
3499         }
3500
3501         new_lock->l_export = class_export_lock_get(req->rq_export, new_lock);
3502         new_lock->l_blocking_ast = lock->l_blocking_ast;
3503         new_lock->l_completion_ast = lock->l_completion_ast;
3504         new_lock->l_remote_handle = lock->l_remote_handle;
3505         new_lock->l_flags &= ~LDLM_FL_LOCAL;
3506
3507         unlock_res_and_lock(new_lock);
3508
3509         cfs_hash_add(new_lock->l_export->exp_lock_hash,
3510                      &new_lock->l_remote_handle,
3511                      &new_lock->l_exp_hash);
3512
3513         LDLM_LOCK_RELEASE(new_lock);
3514         lh->mlh_reg_lh.cookie = 0;
3515
3516         RETURN(ELDLM_LOCK_REPLACED);
3517 }
3518
3519 static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
3520                                     struct ldlm_lock *new_lock,
3521                                     struct ldlm_lock **old_lock,
3522                                     struct mdt_lock_handle *lh)
3523 {
3524         struct ptlrpc_request  *req = mdt_info_req(info);
3525         struct obd_export      *exp = req->rq_export;
3526         struct lustre_handle    remote_hdl;
3527         struct ldlm_request    *dlmreq;
3528         struct ldlm_lock       *lock;
3529
3530         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
3531                 return;
3532
3533         dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
3534         remote_hdl = dlmreq->lock_handle[0];
3535
3536         /* In the function below, .hs_keycmp resolves to
3537          * ldlm_export_lock_keycmp() */
3538         /* coverity[overrun-buffer-val] */
3539         lock = cfs_hash_lookup(exp->exp_lock_hash, &remote_hdl);
3540         if (lock) {
3541                 if (lock != new_lock) {
3542                         lh->mlh_reg_lh.cookie = lock->l_handle.h_cookie;
3543                         lh->mlh_reg_mode = lock->l_granted_mode;
3544
3545                         LDLM_DEBUG(lock, "Restoring lock cookie");
3546                         DEBUG_REQ(D_DLMTRACE, req,
3547                                   "restoring lock cookie "LPX64,
3548                                   lh->mlh_reg_lh.cookie);
3549                         if (old_lock)
3550                                 *old_lock = LDLM_LOCK_GET(lock);
3551                         cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3552                         return;
3553                 }
3554
3555                 cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
3556         }
3557
3558         /*
3559          * If the xid matches, then we know this is a resent request, and allow
3560          * it. (It's probably an OPEN, for which we don't send a lock.
3561          */
3562         if (req_xid_is_last(req))
3563                 return;
3564
3565         /*
3566          * This remote handle isn't enqueued, so we never received or processed
3567          * this request.  Clear MSG_RESENT, because it can be handled like any
3568          * normal request now.
3569          */
3570         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
3571
3572         DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
3573                   remote_hdl.cookie);
3574 }
3575
3576 static int mdt_intent_getattr(enum mdt_it_code opcode,
3577                               struct mdt_thread_info *info,
3578                               struct ldlm_lock **lockp,
3579                               __u64 flags)
3580 {
3581         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3582         struct ldlm_lock       *new_lock = NULL;
3583         __u64                   child_bits;
3584         struct ldlm_reply      *ldlm_rep;
3585         struct ptlrpc_request  *req;
3586         struct mdt_body        *reqbody;
3587         struct mdt_body        *repbody;
3588         int                     rc, rc2;
3589         ENTRY;
3590
3591         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
3592         LASSERT(reqbody);
3593
3594         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
3595         LASSERT(repbody);
3596
3597         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
3598         repbody->eadatasize = 0;
3599         repbody->aclsize = 0;
3600
3601         switch (opcode) {
3602         case MDT_IT_LOOKUP:
3603                 child_bits = MDS_INODELOCK_LOOKUP;
3604                 break;
3605         case MDT_IT_GETATTR:
3606                 child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
3607                 break;
3608         case MDT_IT_LAYOUT: {
3609                 static int printed = 0;
3610
3611                 if (!printed) {
3612                         CERROR("layout lock not supported by this version\n");
3613                         printed = 1;
3614                 }
3615                 GOTO(out_shrink, rc = -EINVAL);
3616                 break;
3617         }
3618         default:
3619                 CERROR("Unsupported intent (%d)\n", opcode);
3620                 GOTO(out_shrink, rc = -EINVAL);
3621         }
3622
3623         rc = mdt_init_ucred(info, reqbody);
3624         if (rc)
3625                 GOTO(out_shrink, rc);
3626
3627         req = info->mti_pill->rc_req;
3628         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3629         mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
3630
3631         /* Get lock from request for possible resent case. */
3632         mdt_intent_fixup_resent(info, *lockp, &new_lock, lhc);
3633
3634         ldlm_rep->lock_policy_res2 =
3635                 mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
3636
3637         if (mdt_get_disposition(ldlm_rep, DISP_LOOKUP_NEG))
3638                 ldlm_rep->lock_policy_res2 = 0;
3639         if (!mdt_get_disposition(ldlm_rep, DISP_LOOKUP_POS) ||
3640             ldlm_rep->lock_policy_res2) {
3641                 lhc->mlh_reg_lh.cookie = 0ull;
3642                 GOTO(out_ucred, rc = ELDLM_LOCK_ABORTED);
3643         }
3644
3645         rc = mdt_intent_lock_replace(info, lockp, new_lock, lhc, flags);
3646         EXIT;
3647 out_ucred:
3648         mdt_exit_ucred(info);
3649 out_shrink:
3650         mdt_client_compatibility(info);
3651         rc2 = mdt_fix_reply(info);
3652         if (rc == 0)
3653                 rc = rc2;
3654         return rc;
3655 }
3656
3657 static int mdt_intent_reint(enum mdt_it_code opcode,
3658                             struct mdt_thread_info *info,
3659                             struct ldlm_lock **lockp,
3660                             __u64 flags)
3661 {
3662         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3663         struct ldlm_reply      *rep = NULL;
3664         long                    opc;
3665         int                     rc;
3666
3667         static const struct req_format *intent_fmts[REINT_MAX] = {
3668                 [REINT_CREATE]  = &RQF_LDLM_INTENT_CREATE,
3669                 [REINT_OPEN]    = &RQF_LDLM_INTENT_OPEN
3670         };
3671
3672         ENTRY;
3673
3674         opc = mdt_reint_opcode(info, intent_fmts);
3675         if (opc < 0)
3676                 RETURN(opc);
3677
3678         if (mdt_it_flavor[opcode].it_reint != opc) {
3679                 CERROR("Reint code %ld doesn't match intent: %d\n",
3680                        opc, opcode);
3681                 RETURN(err_serious(-EPROTO));
3682         }
3683
3684         /* Get lock from request for possible resent case. */
3685         mdt_intent_fixup_resent(info, *lockp, NULL, lhc);
3686
3687         rc = mdt_reint_internal(info, lhc, opc);
3688
3689         /* Check whether the reply has been packed successfully. */
3690         if (mdt_info_req(info)->rq_repmsg != NULL)
3691                 rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3692         if (rep == NULL)
3693                 RETURN(err_serious(-EFAULT));
3694
3695         /* MDC expects this in any case */
3696         if (rc != 0)
3697                 mdt_set_disposition(info, rep, DISP_LOOKUP_EXECD);
3698
3699         /* Cross-ref case, the lock should be returned to the client */
3700         if (rc == -EREMOTE) {
3701                 LASSERT(lustre_handle_is_used(&lhc->mlh_reg_lh));
3702                 rep->lock_policy_res2 = 0;
3703                 rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3704                 RETURN(rc);
3705         }
3706         rep->lock_policy_res2 = clear_serious(rc);
3707
3708         if (rep->lock_policy_res2 == -ENOENT &&
3709             mdt_get_disposition(rep, DISP_LOOKUP_NEG))
3710                 rep->lock_policy_res2 = 0;
3711
3712         if (rc == -ENOTCONN || rc == -ENODEV ||
3713             rc == -EOVERFLOW) { /**< if VBR failure then return error */
3714                 /*
3715                  * If it is the disconnect error (ENODEV & ENOCONN), the error
3716                  * will be returned by rq_status, and client at ptlrpc layer
3717                  * will detect this, then disconnect, reconnect the import
3718                  * immediately, instead of impacting the following the rpc.
3719                  */
3720                 lhc->mlh_reg_lh.cookie = 0ull;
3721                 RETURN(rc);
3722         } else {
3723                 /*
3724                  * For other cases, the error will be returned by intent.
3725                  * and client will retrieve the result from intent.
3726                  */
3727                  /*
3728                   * FIXME: when open lock is finished, that should be
3729                   * checked here.
3730                   */
3731                 if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
3732                         LASSERTF(rc == 0, "Error occurred but lock handle "
3733                                  "is still in use\n");
3734                         rep->lock_policy_res2 = 0;
3735                         rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3736                         RETURN(rc);
3737                 } else {
3738                         lhc->mlh_reg_lh.cookie = 0ull;
3739                         RETURN(ELDLM_LOCK_ABORTED);
3740                 }
3741         }
3742 }
3743
3744 static int mdt_intent_code(long itcode)
3745 {
3746         int rc;
3747
3748         switch(itcode) {
3749         case IT_OPEN:
3750                 rc = MDT_IT_OPEN;
3751                 break;
3752         case IT_OPEN|IT_CREAT:
3753                 rc = MDT_IT_OCREAT;
3754                 break;
3755         case IT_CREAT:
3756                 rc = MDT_IT_CREATE;
3757                 break;
3758         case IT_READDIR:
3759                 rc = MDT_IT_READDIR;
3760                 break;
3761         case IT_GETATTR:
3762                 rc = MDT_IT_GETATTR;
3763                 break;
3764         case IT_LOOKUP:
3765                 rc = MDT_IT_LOOKUP;
3766                 break;
3767         case IT_UNLINK:
3768                 rc = MDT_IT_UNLINK;
3769                 break;
3770         case IT_TRUNC:
3771                 rc = MDT_IT_TRUNC;
3772                 break;
3773         case IT_GETXATTR:
3774                 rc = MDT_IT_GETXATTR;
3775                 break;
3776         case IT_LAYOUT:
3777                 rc = MDT_IT_LAYOUT;
3778                 break;
3779         case IT_QUOTA_DQACQ:
3780         case IT_QUOTA_CONN:
3781                 rc = MDT_IT_QUOTA;
3782                 break;
3783         default:
3784                 CERROR("Unknown intent opcode: %ld\n", itcode);
3785                 rc = -EINVAL;
3786                 break;
3787         }
3788         return rc;
3789 }
3790
3791 static int mdt_intent_opc(long itopc, struct mdt_thread_info *info,
3792                           struct ldlm_lock **lockp, __u64 flags)
3793 {
3794         struct req_capsule   *pill;
3795         struct mdt_it_flavor *flv;
3796         int opc;
3797         int rc;
3798         ENTRY;
3799
3800         opc = mdt_intent_code(itopc);
3801         if (opc < 0)
3802                 RETURN(-EINVAL);
3803
3804         pill = info->mti_pill;
3805
3806         if (opc == MDT_IT_QUOTA) {
3807                 struct lu_device *qmt = info->mti_mdt->mdt_qmt_dev;
3808
3809                 if (qmt == NULL)
3810                         RETURN(-EOPNOTSUPP);
3811
3812                 (*lockp)->l_lvb_type = LVB_T_LQUOTA;
3813                 /* pass the request to quota master */
3814                 rc = qmt_hdls.qmth_intent_policy(info->mti_env, qmt,
3815                                                  mdt_info_req(info), lockp,
3816                                                  flags);
3817                 RETURN(rc);
3818         }
3819
3820         if (opc == MDT_IT_LAYOUT) {
3821                 (*lockp)->l_lvb_type = LVB_T_LAYOUT;
3822                 /* XXX: set replay RMF_DLM_LVB as the real EA size when LAYOUT
3823                  *      lock enabled. */
3824         } else if (opc == MDT_IT_READDIR) {
3825                 req_capsule_set_size(pill, &RMF_DLM_LVB, RCL_SERVER, 0);
3826         }
3827
3828         flv  = &mdt_it_flavor[opc];
3829         if (flv->it_fmt != NULL)
3830                 req_capsule_extend(pill, flv->it_fmt);
3831
3832         rc = mdt_unpack_req_pack_rep(info, flv->it_flags);
3833         if (rc == 0) {
3834                 struct ptlrpc_request *req = mdt_info_req(info);
3835                 if (flv->it_flags & MUTABOR &&
3836                     req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
3837                         RETURN(-EROFS);
3838         }
3839         if (rc == 0 && flv->it_act != NULL) {
3840                 /* execute policy */
3841                 rc = flv->it_act(opc, info, lockp, flags);
3842         } else {
3843                 rc = -EOPNOTSUPP;
3844         }
3845         RETURN(rc);
3846 }
3847
3848 static int mdt_intent_policy(struct ldlm_namespace *ns,
3849                              struct ldlm_lock **lockp, void *req_cookie,
3850                              ldlm_mode_t mode, __u64 flags, void *data)
3851 {
3852         struct mdt_thread_info *info;
3853         struct ptlrpc_request  *req  =  req_cookie;
3854         struct ldlm_intent     *it;
3855         struct req_capsule     *pill;
3856         int rc;
3857
3858         ENTRY;
3859
3860         LASSERT(req != NULL);
3861
3862         info = lu_context_key_get(&req->rq_svc_thread->t_env->le_ctx,
3863                                   &mdt_thread_key);
3864         LASSERT(info != NULL);
3865         pill = info->mti_pill;
3866         LASSERT(pill->rc_req == req);
3867
3868         if (req->rq_reqmsg->lm_bufcount > DLM_INTENT_IT_OFF) {
3869                 req_capsule_extend(pill, &RQF_LDLM_INTENT_BASIC);
3870                 it = req_capsule_client_get(pill, &RMF_LDLM_INTENT);
3871                 if (it != NULL) {
3872                         rc = mdt_intent_opc(it->opc, info, lockp, flags);
3873                         if (rc == 0)
3874                                 rc = ELDLM_OK;
3875
3876                         /* Lock without inodebits makes no sense and will oops
3877                          * later in ldlm. Let's check it now to see if we have
3878                          * ibits corrupted somewhere in mdt_intent_opc().
3879                          * The case for client miss to set ibits has been
3880                          * processed by others. */
3881                         LASSERT(ergo(info->mti_dlm_req->lock_desc.l_resource.\
3882                                         lr_type == LDLM_IBITS,
3883                                      info->mti_dlm_req->lock_desc.\
3884                                         l_policy_data.l_inodebits.bits != 0));
3885                 } else
3886                         rc = err_serious(-EFAULT);
3887         } else {
3888                 /* No intent was provided */
3889                 LASSERT(pill->rc_fmt == &RQF_LDLM_ENQUEUE);
3890                 req_capsule_set_size(pill, &RMF_DLM_LVB, RCL_SERVER, 0);
3891                 rc = req_capsule_server_pack(pill);
3892                 if (rc)
3893                         rc = err_serious(rc);
3894         }
3895         RETURN(rc);
3896 }
3897
3898 static int mdt_seq_fini(const struct lu_env *env,
3899                         struct mdt_device *m)
3900 {
3901         struct md_site *ms = mdt_md_site(m);
3902         ENTRY;
3903
3904         if (ms != NULL) {
3905                 if (ms->ms_server_seq) {
3906                         seq_server_fini(ms->ms_server_seq, env);
3907                         OBD_FREE_PTR(ms->ms_server_seq);
3908                         ms->ms_server_seq = NULL;
3909         }
3910
3911                 if (ms->ms_control_seq) {
3912                         seq_server_fini(ms->ms_control_seq, env);
3913                         OBD_FREE_PTR(ms->ms_control_seq);
3914                         ms->ms_control_seq = NULL;
3915         }
3916
3917                 if (ms->ms_client_seq) {
3918                         seq_client_fini(ms->ms_client_seq);
3919                         OBD_FREE_PTR(ms->ms_client_seq);
3920                         ms->ms_client_seq = NULL;
3921                 }
3922         }
3923
3924         RETURN(0);
3925 }
3926
3927 static int mdt_seq_init(const struct lu_env *env,
3928                         const char *uuid,
3929                         struct mdt_device *m)
3930 {
3931         struct md_site *ms;
3932         char *prefix;
3933         int rc;
3934         ENTRY;
3935
3936         ms = mdt_md_site(m);
3937
3938         /*
3939          * This is sequence-controller node. Init seq-controller server on local
3940          * MDT.
3941          */
3942         if (ms->ms_node_id == 0) {
3943                 LASSERT(ms->ms_control_seq == NULL);
3944
3945                 OBD_ALLOC_PTR(ms->ms_control_seq);
3946                 if (ms->ms_control_seq == NULL)
3947                         RETURN(-ENOMEM);
3948
3949                 rc = seq_server_init(ms->ms_control_seq,
3950                                      m->mdt_bottom, uuid,
3951                                      LUSTRE_SEQ_CONTROLLER,
3952                                      ms,
3953                                      env);
3954
3955                 if (rc)
3956                         GOTO(out_seq_fini, rc);
3957
3958                 OBD_ALLOC_PTR(ms->ms_client_seq);
3959                 if (ms->ms_client_seq == NULL)
3960                         GOTO(out_seq_fini, rc = -ENOMEM);
3961
3962                 OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
3963                 if (prefix == NULL) {
3964                         OBD_FREE_PTR(ms->ms_client_seq);
3965                         GOTO(out_seq_fini, rc = -ENOMEM);
3966                 }
3967
3968                 snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
3969                          uuid);
3970
3971                 /*
3972                  * Init seq-controller client after seq-controller server is
3973                  * ready. Pass ms->ms_control_seq to it for direct talking.
3974                  */
3975                 rc = seq_client_init(ms->ms_client_seq, NULL,
3976                                      LUSTRE_SEQ_METADATA, prefix,
3977                                      ms->ms_control_seq);
3978                 OBD_FREE(prefix, MAX_OBD_NAME + 5);
3979
3980                 if (rc)
3981                         GOTO(out_seq_fini, rc);
3982         }
3983
3984         /* Init seq-server on local MDT */
3985         LASSERT(ms->ms_server_seq == NULL);
3986
3987         OBD_ALLOC_PTR(ms->ms_server_seq);
3988         if (ms->ms_server_seq == NULL)
3989                 GOTO(out_seq_fini, rc = -ENOMEM);
3990
3991         rc = seq_server_init(ms->ms_server_seq,
3992                              m->mdt_bottom, uuid,
3993                              LUSTRE_SEQ_SERVER,
3994                              ms,
3995                              env);
3996         if (rc)
3997                 GOTO(out_seq_fini, rc = -ENOMEM);
3998
3999         /* Assign seq-controller client to local seq-server. */
4000         if (ms->ms_node_id == 0) {
4001                 LASSERT(ms->ms_client_seq != NULL);
4002
4003                 rc = seq_server_set_cli(ms->ms_server_seq,
4004                                         ms->ms_client_seq,
4005                                         env);
4006         }
4007
4008         EXIT;
4009 out_seq_fini:
4010         if (rc)
4011                 mdt_seq_fini(env, m);
4012
4013         return rc;
4014 }
4015 /*
4016  * Init client sequence manager which is used by local MDS to talk to sequence
4017  * controller on remote node.
4018  */
4019 static int mdt_seq_init_cli(const struct lu_env *env,
4020                             struct mdt_device *m,
4021                             struct lustre_cfg *cfg)
4022 {
4023         struct md_site    *ms = mdt_md_site(m);
4024         struct obd_device *mdc;
4025         struct obd_uuid   *uuidp, *mdcuuidp;
4026         char              *uuid_str, *mdc_uuid_str;
4027         int                rc;
4028         int                index;
4029         struct mdt_thread_info *info;
4030         char *p, *index_string = lustre_cfg_string(cfg, 2);
4031         ENTRY;
4032
4033         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4034         uuidp = &info->mti_u.uuid[0];
4035         mdcuuidp = &info->mti_u.uuid[1];
4036
4037         LASSERT(index_string);
4038
4039         index = simple_strtol(index_string, &p, 10);
4040         if (*p) {
4041                 CERROR("Invalid index in lustre_cgf, offset 2\n");
4042                 RETURN(-EINVAL);
4043         }
4044
4045         /* check if this is adding the first MDC and controller is not yet
4046          * initialized. */
4047         if (index != 0 || ms->ms_client_seq)
4048                 RETURN(0);
4049
4050         uuid_str = lustre_cfg_string(cfg, 1);
4051         mdc_uuid_str = lustre_cfg_string(cfg, 4);
4052         obd_str2uuid(uuidp, uuid_str);
4053         obd_str2uuid(mdcuuidp, mdc_uuid_str);
4054
4055         mdc = class_find_client_obd(uuidp, LUSTRE_MDC_NAME, mdcuuidp);
4056         if (!mdc) {
4057                 CERROR("can't find controller MDC by uuid %s\n",
4058                        uuid_str);
4059                 rc = -ENOENT;
4060         } else if (!mdc->obd_set_up) {
4061                 CERROR("target %s not set up\n", mdc->obd_name);
4062                 rc = -EINVAL;
4063         } else {
4064                 LASSERT(ms->ms_control_exp);
4065                 OBD_ALLOC_PTR(ms->ms_client_seq);
4066                 if (ms->ms_client_seq != NULL) {
4067                         char *prefix;
4068
4069                         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
4070                         if (!prefix)
4071                                 RETURN(-ENOMEM);
4072
4073                         snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
4074                                  mdc->obd_name);
4075
4076                         rc = seq_client_init(ms->ms_client_seq,
4077                                              ms->ms_control_exp,
4078                                              LUSTRE_SEQ_METADATA,
4079                                              prefix, NULL);
4080                         OBD_FREE(prefix, MAX_OBD_NAME + 5);
4081                 } else
4082                         rc = -ENOMEM;
4083
4084                 if (rc)
4085                         RETURN(rc);
4086
4087                 LASSERT(ms->ms_server_seq != NULL);
4088                 rc = seq_server_set_cli(ms->ms_server_seq, ms->ms_client_seq,
4089                                         env);
4090         }
4091
4092         RETURN(rc);
4093 }
4094
4095 static void mdt_seq_fini_cli(struct mdt_device *m)
4096 {
4097         struct md_site *ms;
4098
4099         ENTRY;
4100
4101         ms = mdt_md_site(m);
4102
4103         if (ms != NULL) {
4104                 if (ms->ms_server_seq)
4105                         seq_server_set_cli(ms->ms_server_seq,
4106                                    NULL, NULL);
4107
4108                 if (ms->ms_control_exp) {
4109                         class_export_put(ms->ms_control_exp);
4110                         ms->ms_control_exp = NULL;
4111                 }
4112         }
4113         EXIT;
4114 }
4115
4116 /*
4117  * FLD wrappers
4118  */
4119 static int mdt_fld_fini(const struct lu_env *env,
4120                         struct mdt_device *m)
4121 {
4122         struct md_site *ms = mdt_md_site(m);
4123         ENTRY;
4124
4125         if (ms && ms->ms_server_fld) {
4126                 fld_server_fini(ms->ms_server_fld, env);
4127                 OBD_FREE_PTR(ms->ms_server_fld);
4128                 ms->ms_server_fld = NULL;
4129         }
4130
4131         RETURN(0);
4132 }
4133
4134 static int mdt_fld_init(const struct lu_env *env,
4135                         const char *uuid,
4136                         struct mdt_device *m)
4137 {
4138         struct md_site *ms;
4139         int rc;
4140         ENTRY;
4141
4142         ms = mdt_md_site(m);
4143
4144         OBD_ALLOC_PTR(ms->ms_server_fld);
4145         if (ms->ms_server_fld == NULL)
4146                 RETURN(rc = -ENOMEM);
4147
4148         rc = fld_server_init(ms->ms_server_fld,
4149                              m->mdt_bottom, uuid,
4150                              env, ms->ms_node_id);
4151         if (rc) {
4152                 OBD_FREE_PTR(ms->ms_server_fld);
4153                 ms->ms_server_fld = NULL;
4154                 RETURN(rc);
4155         }
4156
4157         RETURN(0);
4158 }
4159
4160 /* device init/fini methods */
4161 static void mdt_stop_ptlrpc_service(struct mdt_device *m)
4162 {
4163         ENTRY;
4164         if (m->mdt_regular_service != NULL) {
4165                 ptlrpc_unregister_service(m->mdt_regular_service);
4166                 m->mdt_regular_service = NULL;
4167         }
4168         if (m->mdt_readpage_service != NULL) {
4169                 ptlrpc_unregister_service(m->mdt_readpage_service);
4170                 m->mdt_readpage_service = NULL;
4171         }
4172         if (m->mdt_xmds_service != NULL) {
4173                 ptlrpc_unregister_service(m->mdt_xmds_service);
4174                 m->mdt_xmds_service = NULL;
4175         }
4176         if (m->mdt_setattr_service != NULL) {
4177                 ptlrpc_unregister_service(m->mdt_setattr_service);
4178                 m->mdt_setattr_service = NULL;
4179         }
4180         if (m->mdt_mdsc_service != NULL) {
4181                 ptlrpc_unregister_service(m->mdt_mdsc_service);
4182                 m->mdt_mdsc_service = NULL;
4183         }
4184         if (m->mdt_mdss_service != NULL) {
4185                 ptlrpc_unregister_service(m->mdt_mdss_service);
4186                 m->mdt_mdss_service = NULL;
4187         }
4188         if (m->mdt_dtss_service != NULL) {
4189                 ptlrpc_unregister_service(m->mdt_dtss_service);
4190                 m->mdt_dtss_service = NULL;
4191         }
4192         if (m->mdt_fld_service != NULL) {
4193                 ptlrpc_unregister_service(m->mdt_fld_service);
4194                 m->mdt_fld_service = NULL;
4195         }
4196         EXIT;
4197 }
4198
4199 static int mdt_start_ptlrpc_service(struct mdt_device *m)
4200 {
4201         static struct ptlrpc_service_conf conf;
4202         cfs_proc_dir_entry_t *procfs_entry;
4203         int rc = 0;
4204         ENTRY;
4205
4206         m->mdt_ldlm_client = &m->mdt_md_dev.md_lu_dev.ld_obd->obd_ldlm_client;
4207         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
4208                            "mdt_ldlm_client", m->mdt_ldlm_client);
4209
4210         procfs_entry = m->mdt_md_dev.md_lu_dev.ld_obd->obd_proc_entry;
4211
4212         conf = (typeof(conf)) {
4213                 .psc_name               = LUSTRE_MDT_NAME,
4214                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4215                 .psc_buf                = {
4216                         .bc_nbufs               = MDS_NBUFS,
4217                         .bc_buf_size            = MDS_BUFSIZE,
4218                         .bc_req_max_size        = MDS_MAXREQSIZE,
4219                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4220                         .bc_req_portal          = MDS_REQUEST_PORTAL,
4221                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4222                 },
4223                 /*
4224                  * We'd like to have a mechanism to set this on a per-device
4225                  * basis, but alas...
4226                  */
4227                 .psc_thr                = {
4228                         .tc_thr_name            = LUSTRE_MDT_NAME,
4229                         .tc_thr_factor          = MDT_THR_FACTOR,
4230                         .tc_nthrs_init          = MDT_NTHRS_INIT,
4231                         .tc_nthrs_base          = MDT_NTHRS_BASE,
4232                         .tc_nthrs_max           = MDT_NTHRS_MAX,
4233                         .tc_nthrs_user          = mds_num_threads,
4234                         .tc_cpu_affinity        = 1,
4235                         .tc_ctx_tags            = LCT_MD_THREAD,
4236                 },
4237                 .psc_cpt                = {
4238                         .cc_pattern             = mds_num_cpts,
4239                 },
4240                 .psc_ops                = {
4241                         .so_req_handler         = mdt_regular_handle,
4242                         .so_req_printer         = target_print_req,
4243                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4244                 },
4245         };
4246         m->mdt_regular_service = ptlrpc_register_service(&conf, procfs_entry);
4247         if (IS_ERR(m->mdt_regular_service)) {
4248                 rc = PTR_ERR(m->mdt_regular_service);
4249                 CERROR("failed to start regular mdt service: %d\n", rc);
4250                 m->mdt_regular_service = NULL;
4251
4252                 RETURN(rc);
4253         }
4254
4255         /*
4256          * readpage service configuration. Parameters have to be adjusted,
4257          * ideally.
4258          */
4259         memset(&conf, 0, sizeof(conf));
4260         conf = (typeof(conf)) {
4261                 .psc_name               = LUSTRE_MDT_NAME "_readpage",
4262                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4263                 .psc_buf                = {
4264                         .bc_nbufs               = MDS_NBUFS,
4265                         .bc_buf_size            = MDS_BUFSIZE,
4266                         .bc_req_max_size        = MDS_MAXREQSIZE,
4267                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4268                         .bc_req_portal          = MDS_READPAGE_PORTAL,
4269                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4270                 },
4271                 .psc_thr                = {
4272                         .tc_thr_name            = "mdt_rdpg",
4273                         .tc_thr_factor          = MDT_RDPG_THR_FACTOR,
4274                         .tc_nthrs_init          = MDT_RDPG_NTHRS_INIT,
4275                         .tc_nthrs_base          = MDT_RDPG_NTHRS_BASE,
4276                         .tc_nthrs_max           = MDT_RDPG_NTHRS_MAX,
4277                         .tc_nthrs_user          = mds_rdpg_num_threads,
4278                         .tc_cpu_affinity        = 1,
4279                         .tc_ctx_tags            = LCT_MD_THREAD,
4280                 },
4281                 .psc_cpt                = {
4282                         .cc_pattern             = mds_rdpg_num_cpts,
4283                 },
4284                 .psc_ops                = {
4285                         .so_req_handler         = mdt_readpage_handle,
4286                         .so_req_printer         = target_print_req,
4287                 },
4288         };
4289         m->mdt_readpage_service = ptlrpc_register_service(&conf, procfs_entry);
4290         if (IS_ERR(m->mdt_readpage_service)) {
4291                 rc = PTR_ERR(m->mdt_readpage_service);
4292                 CERROR("failed to start readpage service: %d\n", rc);
4293                 m->mdt_readpage_service = NULL;
4294
4295                 GOTO(err_mdt_svc, rc);
4296         }
4297
4298         /*
4299          * setattr service configuration.
4300          *
4301          * XXX To keep the compatibility with old client(< 2.2), we need to
4302          * preserve this portal for a certain time, it should be removed
4303          * eventually. LU-617.
4304          */
4305         memset(&conf, 0, sizeof(conf));
4306         conf = (typeof(conf)) {
4307                 .psc_name               = LUSTRE_MDT_NAME "_setattr",
4308                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4309                 .psc_buf                = {
4310                         .bc_nbufs               = MDS_NBUFS,
4311                         .bc_buf_size            = MDS_BUFSIZE,
4312                         .bc_req_max_size        = MDS_MAXREQSIZE,
4313                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4314                         .bc_req_portal          = MDS_SETATTR_PORTAL,
4315                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4316                 },
4317                 .psc_thr                = {
4318                         .tc_thr_name            = "mdt_attr",
4319                         .tc_thr_factor          = MDT_SETA_THR_FACTOR,
4320                         .tc_nthrs_init          = MDT_SETA_NTHRS_INIT,
4321                         .tc_nthrs_base          = MDT_SETA_NTHRS_BASE,
4322                         .tc_nthrs_max           = MDT_SETA_NTHRS_MAX,
4323                         .tc_nthrs_user          = mds_attr_num_threads,
4324                         .tc_cpu_affinity        = 1,
4325                         .tc_ctx_tags            = LCT_MD_THREAD,
4326                 },
4327                 .psc_cpt                = {
4328                         .cc_pattern             = mds_attr_num_cpts,
4329                 },
4330                 .psc_ops                = {
4331                         .so_req_handler         = mdt_regular_handle,
4332                         .so_req_printer         = target_print_req,
4333                 },
4334         };
4335         m->mdt_setattr_service = ptlrpc_register_service(&conf, procfs_entry);
4336         if (IS_ERR(m->mdt_setattr_service)) {
4337                 rc = PTR_ERR(m->mdt_setattr_service);
4338                 CERROR("failed to start setattr service: %d\n", rc);
4339                 m->mdt_setattr_service = NULL;
4340
4341                 GOTO(err_mdt_svc, rc);
4342         }
4343
4344         /*
4345          * sequence controller service configuration
4346          */
4347         memset(&conf, 0, sizeof(conf));
4348         conf = (typeof(conf)) {
4349                 .psc_name               = LUSTRE_MDT_NAME "_mdsc",
4350                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4351                 .psc_buf                = {
4352                         .bc_nbufs               = MDS_NBUFS,
4353                         .bc_buf_size            = MDS_BUFSIZE,
4354                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4355                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4356                         .bc_req_portal          = SEQ_CONTROLLER_PORTAL,
4357                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4358                 },
4359                 .psc_thr                = {
4360                         .tc_thr_name            = "mdt_mdsc",
4361                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4362                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4363                         .tc_ctx_tags            = LCT_MD_THREAD,
4364                 },
4365                 .psc_ops                = {
4366                         .so_req_handler         = mdt_mdsc_handle,
4367                         .so_req_printer         = target_print_req,
4368                 },
4369         };
4370         m->mdt_mdsc_service = ptlrpc_register_service(&conf, procfs_entry);
4371         if (IS_ERR(m->mdt_mdsc_service)) {
4372                 rc = PTR_ERR(m->mdt_mdsc_service);
4373                 CERROR("failed to start seq controller service: %d\n", rc);
4374                 m->mdt_mdsc_service = NULL;
4375
4376                 GOTO(err_mdt_svc, rc);
4377         }
4378
4379         /*
4380          * metadata sequence server service configuration
4381          */
4382         memset(&conf, 0, sizeof(conf));
4383         conf = (typeof(conf)) {
4384                 .psc_name               = LUSTRE_MDT_NAME "_mdss",
4385                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4386                 .psc_buf                = {
4387                         .bc_nbufs               = MDS_NBUFS,
4388                         .bc_buf_size            = MDS_BUFSIZE,
4389                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4390                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4391                         .bc_req_portal          = SEQ_METADATA_PORTAL,
4392                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4393                 },
4394                 .psc_thr                = {
4395                         .tc_thr_name            = "mdt_mdss",
4396                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4397                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4398                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4399                 },
4400                 .psc_ops                = {
4401                         .so_req_handler         = mdt_mdss_handle,
4402                         .so_req_printer         = target_print_req,
4403                 },
4404         };
4405         m->mdt_mdss_service = ptlrpc_register_service(&conf, procfs_entry);
4406         if (IS_ERR(m->mdt_mdss_service)) {
4407                 rc = PTR_ERR(m->mdt_mdss_service);
4408                 CERROR("failed to start metadata seq server service: %d\n", rc);
4409                 m->mdt_mdss_service = NULL;
4410
4411                 GOTO(err_mdt_svc, rc);
4412         }
4413
4414         /*
4415          * Data sequence server service configuration. We want to have really
4416          * cluster-wide sequences space. This is why we start only one sequence
4417          * controller which manages space.
4418          */
4419         memset(&conf, 0, sizeof(conf));
4420         conf = (typeof(conf)) {
4421                 .psc_name               = LUSTRE_MDT_NAME "_dtss",
4422                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4423                 .psc_buf                = {
4424                         .bc_nbufs               = MDS_NBUFS,
4425                         .bc_buf_size            = MDS_BUFSIZE,
4426                         .bc_req_max_size        = SEQ_MAXREQSIZE,
4427                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
4428                         .bc_req_portal          = SEQ_DATA_PORTAL,
4429                         .bc_rep_portal          = OSC_REPLY_PORTAL,
4430                 },
4431                 .psc_thr                = {
4432                         .tc_thr_name            = "mdt_dtss",
4433                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4434                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4435                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
4436                 },
4437                 .psc_ops                = {
4438                         .so_req_handler         = mdt_dtss_handle,
4439                         .so_req_printer         = target_print_req,
4440                 },
4441         };
4442         m->mdt_dtss_service = ptlrpc_register_service(&conf, procfs_entry);
4443         if (IS_ERR(m->mdt_dtss_service)) {
4444                 rc = PTR_ERR(m->mdt_dtss_service);
4445                 CERROR("failed to start data seq server service: %d\n", rc);
4446                 m->mdt_dtss_service = NULL;
4447
4448                 GOTO(err_mdt_svc, rc);
4449         }
4450
4451         /* FLD service start */
4452         memset(&conf, 0, sizeof(conf));
4453         conf = (typeof(conf)) {
4454                 .psc_name            = LUSTRE_MDT_NAME "_fld",
4455                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4456                 .psc_buf                = {
4457                         .bc_nbufs               = MDS_NBUFS,
4458                         .bc_buf_size            = MDS_BUFSIZE,
4459                         .bc_req_max_size        = FLD_MAXREQSIZE,
4460                         .bc_rep_max_size        = FLD_MAXREPSIZE,
4461                         .bc_req_portal          = FLD_REQUEST_PORTAL,
4462                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4463                 },
4464                 .psc_thr                = {
4465                         .tc_thr_name            = "mdt_fld",
4466                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4467                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4468                         .tc_ctx_tags            = LCT_DT_THREAD | LCT_MD_THREAD
4469                 },
4470                 .psc_ops                = {
4471                         .so_req_handler         = mdt_fld_handle,
4472                         .so_req_printer         = target_print_req,
4473                 },
4474         };
4475         m->mdt_fld_service = ptlrpc_register_service(&conf, procfs_entry);
4476         if (IS_ERR(m->mdt_fld_service)) {
4477                 rc = PTR_ERR(m->mdt_fld_service);
4478                 CERROR("failed to start fld service: %d\n", rc);
4479                 m->mdt_fld_service = NULL;
4480
4481                 GOTO(err_mdt_svc, rc);
4482         }
4483
4484         /*
4485          * mds-mds service configuration. Separate portal is used to allow
4486          * mds-mds requests be not blocked during recovery.
4487          */
4488         memset(&conf, 0, sizeof(conf));
4489         conf = (typeof(conf)) {
4490                 .psc_name               = LUSTRE_MDT_NAME "_mds",
4491                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
4492                 .psc_buf                = {
4493                         .bc_nbufs               = MDS_NBUFS,
4494                         .bc_buf_size            = MDS_BUFSIZE,
4495                         .bc_req_max_size        = MDS_MAXREQSIZE,
4496                         .bc_rep_max_size        = MDS_MAXREPSIZE,
4497                         .bc_req_portal          = MDS_MDS_PORTAL,
4498                         .bc_rep_portal          = MDC_REPLY_PORTAL,
4499                 },
4500                 .psc_thr                = {
4501                         .tc_thr_name            = "mdt_mds",
4502                         .tc_nthrs_init          = MDT_OTHR_NTHRS_INIT,
4503                         .tc_nthrs_max           = MDT_OTHR_NTHRS_MAX,
4504                         .tc_ctx_tags            = LCT_MD_THREAD,
4505                 },
4506                 .psc_ops                = {
4507                         .so_req_handler         = mdt_xmds_handle,
4508                         .so_req_printer         = target_print_req,
4509                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
4510                 },
4511         };
4512         m->mdt_xmds_service = ptlrpc_register_service(&conf, procfs_entry);
4513         if (IS_ERR(m->mdt_xmds_service)) {
4514                 rc = PTR_ERR(m->mdt_xmds_service);
4515                 CERROR("failed to start xmds service: %d\n", rc);
4516                 m->mdt_xmds_service = NULL;
4517
4518                 GOTO(err_mdt_svc, rc);
4519         }
4520
4521         EXIT;
4522 err_mdt_svc:
4523         if (rc)
4524                 mdt_stop_ptlrpc_service(m);
4525
4526         return rc;
4527 }
4528
4529 static void mdt_stack_fini(const struct lu_env *env,
4530                            struct mdt_device *m, struct lu_device *top)
4531 {
4532         struct obd_device       *obd = mdt2obd_dev(m);
4533         struct lustre_cfg_bufs  *bufs;
4534         struct lustre_cfg       *lcfg;
4535         struct mdt_thread_info  *info;
4536         char flags[3]="";
4537         ENTRY;
4538
4539         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4540         LASSERT(info != NULL);
4541
4542         lu_dev_del_linkage(top->ld_site, top);
4543
4544         lu_site_purge(env, top->ld_site, -1);
4545
4546         bufs = &info->mti_u.bufs;
4547         /* process cleanup, pass mdt obd name to get obd umount flags */
4548         /* another purpose is to let all layers to release their objects */
4549         lustre_cfg_bufs_reset(bufs, obd->obd_name);
4550         if (obd->obd_force)
4551                 strcat(flags, "F");
4552         if (obd->obd_fail)
4553                 strcat(flags, "A");
4554         lustre_cfg_bufs_set_string(bufs, 1, flags);
4555         lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
4556         if (!lcfg) {
4557                 CERROR("Cannot alloc lcfg!\n");
4558                 return;
4559         }
4560         LASSERT(top);
4561         top->ld_ops->ldo_process_config(env, top, lcfg);
4562         lustre_cfg_free(lcfg);
4563
4564         lu_site_purge(env, top->ld_site, -1);
4565
4566         m->mdt_child = NULL;
4567         m->mdt_bottom = NULL;
4568
4569         obd_disconnect(m->mdt_child_exp);
4570         m->mdt_child_exp = NULL;
4571
4572         obd_disconnect(m->mdt_bottom_exp);
4573         m->mdt_child_exp = NULL;
4574 }
4575
4576 static int mdt_connect_to_next(const struct lu_env *env, struct mdt_device *m,
4577                                const char *next, struct obd_export **exp)
4578 {
4579         struct obd_connect_data *data = NULL;
4580         struct obd_device       *obd;
4581         int                      rc;
4582         ENTRY;
4583
4584         OBD_ALLOC_PTR(data);
4585         if (data == NULL)
4586                 GOTO(out, rc = -ENOMEM);
4587
4588         obd = class_name2obd(next);
4589         if (obd == NULL) {
4590                 CERROR("%s: can't locate next device: %s\n",
4591                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next);
4592                 GOTO(out, rc = -ENOTCONN);
4593         }
4594
4595         data->ocd_connect_flags = OBD_CONNECT_VERSION;
4596         data->ocd_version = LUSTRE_VERSION_CODE;
4597
4598         rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
4599         if (rc) {
4600                 CERROR("%s: cannot connect to next dev %s (%d)\n",
4601                        m->mdt_md_dev.md_lu_dev.ld_obd->obd_name, next, rc);
4602                 GOTO(out, rc);
4603         }
4604
4605 out:
4606         if (data)
4607                 OBD_FREE_PTR(data);
4608         RETURN(rc);
4609 }
4610
4611 static int mdt_stack_init(const struct lu_env *env, struct mdt_device *mdt,
4612                           struct lustre_cfg *cfg)
4613 {
4614         char                   *dev = lustre_cfg_string(cfg, 0);
4615         int                     rc, name_size, uuid_size;
4616         char                   *name, *uuid, *p;
4617         struct lustre_cfg_bufs *bufs;
4618         struct lustre_cfg      *lcfg;
4619         struct obd_device      *obd;
4620         struct lustre_profile  *lprof;
4621         struct lu_site         *site;
4622         ENTRY;
4623
4624         /* in 1.8 we had the only device in the stack - MDS.
4625          * 2.0 introduces MDT, MDD, OSD; MDT starts others internally.
4626          * in 2.3 OSD is instantiated by obd_mount.c, so we need
4627          * to generate names and setup MDT, MDD. MDT will be using
4628          * generated name to connect to MDD. for MDD the next device
4629          * will be LOD with name taken from so called "profile" which
4630          * is generated by mount_option line
4631          *
4632          * 1.8 MGS generates config. commands like this:
4633          *   #06 (104)mount_option 0:  1:lustre-MDT0000  2:lustre-mdtlov
4634          *   #08 (120)setup   0:lustre-MDT0000  1:dev 2:type 3:lustre-MDT0000
4635          * 2.0 MGS generates config. commands like this:
4636          *   #07 (112)mount_option 0:  1:lustre-MDT0000  2:lustre-MDT0000-mdtlov
4637          *   #08 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4638          *                    3:lustre-MDT0000-mdtlov  4:f
4639          *
4640          * we generate MDD name from MDT one, just replacing T with D
4641          *
4642          * after all the preparations, the logical equivalent will be
4643          *   #01 (160)setup   0:lustre-MDD0000  1:lustre-MDD0000_UUID  2:0
4644          *                    3:lustre-MDT0000-mdtlov  4:f
4645          *   #02 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4646          *                    3:lustre-MDD0000  4:f
4647          *
4648          *  notice we build the stack from down to top: MDD first, then MDT */
4649
4650         name_size = MAX_OBD_NAME;
4651         uuid_size = MAX_OBD_NAME;
4652
4653         OBD_ALLOC(name, name_size);
4654         OBD_ALLOC(uuid, uuid_size);
4655         if (name == NULL || uuid == NULL)
4656                 GOTO(cleanup_mem, rc = -ENOMEM);
4657
4658         OBD_ALLOC_PTR(bufs);
4659         if (!bufs)
4660                 GOTO(cleanup_mem, rc = -ENOMEM);
4661
4662         strcpy(name, dev);
4663         p = strstr(name, "-MDT");
4664         if (p == NULL)
4665                 GOTO(cleanup_mem, rc = -ENOMEM);
4666         p[3] = 'D';
4667
4668         snprintf(uuid, MAX_OBD_NAME, "%s_UUID", name);
4669
4670         lprof = class_get_profile(lustre_cfg_string(cfg, 0));
4671         if (lprof == NULL || lprof->lp_dt == NULL) {
4672                 CERROR("can't find the profile: %s\n",
4673                        lustre_cfg_string(cfg, 0));
4674                 GOTO(cleanup_mem, rc = -EINVAL);
4675         }
4676
4677         lustre_cfg_bufs_reset(bufs, name);
4678         lustre_cfg_bufs_set_string(bufs, 1, LUSTRE_MDD_NAME);
4679         lustre_cfg_bufs_set_string(bufs, 2, uuid);
4680         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4681
4682         lcfg = lustre_cfg_new(LCFG_ATTACH, bufs);
4683         if (!lcfg)
4684                 GOTO(free_bufs, rc = -ENOMEM);
4685
4686         rc = class_attach(lcfg);
4687         if (rc)
4688                 GOTO(lcfg_cleanup, rc);
4689
4690         obd = class_name2obd(name);
4691         if (!obd) {
4692                 CERROR("Can not find obd %s (%s in config)\n",
4693                        MDD_OBD_NAME, lustre_cfg_string(cfg, 0));
4694                 GOTO(class_detach, rc = -EINVAL);
4695         }
4696
4697         lustre_cfg_free(lcfg);
4698
4699         lustre_cfg_bufs_reset(bufs, name);
4700         lustre_cfg_bufs_set_string(bufs, 1, uuid);
4701         lustre_cfg_bufs_set_string(bufs, 2, dev);
4702         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4703
4704         lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
4705
4706         rc = class_setup(obd, lcfg);
4707         if (rc)
4708                 GOTO(class_detach, rc);
4709
4710         /* connect to MDD we just setup */
4711         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_child_exp);
4712         if (rc)
4713                 RETURN(rc);
4714
4715         site = mdt->mdt_child_exp->exp_obd->obd_lu_dev->ld_site;
4716         LASSERT(site);
4717         LASSERT(mdt->mdt_md_dev.md_lu_dev.ld_site == NULL);
4718         mdt->mdt_md_dev.md_lu_dev.ld_site = site;
4719         site->ls_top_dev = &mdt->mdt_md_dev.md_lu_dev;
4720         mdt->mdt_child = lu2md_dev(mdt->mdt_child_exp->exp_obd->obd_lu_dev);
4721
4722
4723         /* now connect to bottom OSD */
4724         snprintf(name, MAX_OBD_NAME, "%s-osd", dev);
4725         rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_bottom_exp);
4726         if (rc)
4727                 RETURN(rc);
4728         mdt->mdt_bottom =
4729                 lu2dt_dev(mdt->mdt_bottom_exp->exp_obd->obd_lu_dev);
4730
4731
4732         rc = lu_env_refill((struct lu_env *)env);
4733         if (rc != 0)
4734                 CERROR("Failure to refill session: '%d'\n", rc);
4735
4736         lu_dev_add_linkage(site, &mdt->mdt_md_dev.md_lu_dev);
4737
4738         EXIT;
4739 class_detach:
4740         if (rc)
4741                 class_detach(obd, lcfg);
4742 lcfg_cleanup:
4743         lustre_cfg_free(lcfg);
4744 free_bufs:
4745         OBD_FREE_PTR(bufs);
4746 cleanup_mem:
4747         if (name)
4748                 OBD_FREE(name, name_size);
4749         if (uuid)
4750                 OBD_FREE(uuid, uuid_size);
4751         RETURN(rc);
4752 }
4753
4754 /* setup quota master target on MDT0 */
4755 static int mdt_quota_init(const struct lu_env *env, struct mdt_device *mdt,
4756                           struct lustre_cfg *cfg)
4757 {
4758         struct obd_device       *obd;
4759         char                    *dev = lustre_cfg_string(cfg, 0);
4760         char                    *qmtname, *uuid, *p;
4761         struct lustre_cfg_bufs  *bufs;
4762         struct lustre_cfg       *lcfg;
4763         struct lustre_profile   *lprof;
4764         struct obd_connect_data *data;
4765         int                      rc;
4766         ENTRY;
4767
4768         LASSERT(mdt->mdt_qmt_exp == NULL);
4769         LASSERT(mdt->mdt_qmt_dev == NULL);
4770
4771         /* quota master is on MDT0 only for now */
4772         if (mdt->mdt_mite.ms_node_id != 0)
4773                 RETURN(0);
4774
4775         /* MGS generates config commands which look as follows:
4776          *   #01 (160)setup   0:lustre-MDT0000  1:lustre-MDT0000_UUID  2:0
4777          *                    3:lustre-MDT0000-mdtlov  4:f
4778          *
4779          * We generate the QMT name from the MDT one, just replacing MD with QM
4780          * after all the preparations, the logical equivalent will be:
4781          *   #01 (160)setup   0:lustre-QMT0000  1:lustre-QMT0000_UUID  2:0
4782          *                    3:lustre-MDT0000-osd  4:f */
4783         OBD_ALLOC(qmtname, MAX_OBD_NAME);
4784         OBD_ALLOC(uuid, UUID_MAX);
4785         OBD_ALLOC_PTR(bufs);
4786         OBD_ALLOC_PTR(data);
4787         if (qmtname == NULL || uuid == NULL || bufs == NULL || data == NULL)
4788                 GOTO(cleanup_mem, rc = -ENOMEM);
4789
4790         strcpy(qmtname, dev);
4791         p = strstr(qmtname, "-MDT");
4792         if (p == NULL)
4793                 GOTO(cleanup_mem, rc = -ENOMEM);
4794         /* replace MD with QM */
4795         p[1] = 'Q';
4796         p[2] = 'M';
4797
4798         snprintf(uuid, UUID_MAX, "%s_UUID", qmtname);
4799
4800         lprof = class_get_profile(lustre_cfg_string(cfg, 0));
4801         if (lprof == NULL || lprof->lp_dt == NULL) {
4802                 CERROR("can't find profile for %s\n",
4803                        lustre_cfg_string(cfg, 0));
4804                 GOTO(cleanup_mem, rc = -EINVAL);
4805         }
4806
4807         lustre_cfg_bufs_reset(bufs, qmtname);
4808         lustre_cfg_bufs_set_string(bufs, 1, LUSTRE_QMT_NAME);
4809         lustre_cfg_bufs_set_string(bufs, 2, uuid);
4810         lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
4811
4812         lcfg = lustre_cfg_new(LCFG_ATTACH, bufs);
4813         if (!lcfg)
4814                 GOTO(cleanup_mem, rc = -ENOMEM);
4815
4816         rc = class_attach(lcfg);
4817         if (rc)
4818                 GOTO(lcfg_cleanup, rc);
4819
4820         obd = class_name2obd(qmtname);
4821         if (!obd) {
4822                 CERROR("Can not find obd %s (%s in config)\n", qmtname,
4823                        lustre_cfg_string(cfg, 0));
4824                 GOTO(class_detach, rc = -EINVAL);
4825         }
4826
4827         lustre_cfg_free(lcfg);
4828
4829         lustre_cfg_bufs_reset(bufs, qmtname);
4830         lustre_cfg_bufs_set_string(bufs, 1, uuid);
4831         lustre_cfg_bufs_set_string(bufs, 2, dev);
4832
4833         /* for quota, the next device should be the OSD device */
4834         lustre_cfg_bufs_set_string(bufs, 3,
4835                                    mdt->mdt_bottom->dd_lu_dev.ld_obd->obd_name);
4836
4837         lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
4838
4839         rc = class_setup(obd, lcfg);
4840         if (rc)
4841                 GOTO(class_detach, rc);
4842
4843         mdt->mdt_qmt_dev = obd->obd_lu_dev;
4844
4845         /* configure local quota objects */
4846         rc = mdt->mdt_qmt_dev->ld_ops->ldo_prepare(env,
4847                                                    &mdt->mdt_md_dev.md_lu_dev,
4848                                                    mdt->mdt_qmt_dev);
4849         if (rc)
4850                 GOTO(class_cleanup, rc);
4851
4852         /* connect to quota master target */
4853         data->ocd_connect_flags = OBD_CONNECT_VERSION;
4854         data->ocd_version = LUSTRE_VERSION_CODE;
4855         rc = obd_connect(NULL, &mdt->mdt_qmt_exp, obd, &obd->obd_uuid,
4856                          data, NULL);
4857         if (rc) {
4858                 CERROR("cannot connect to quota master device %s (%d)\n",
4859                        qmtname, rc);
4860                 GOTO(class_cleanup, rc);
4861         }
4862
4863         EXIT;
4864 class_cleanup:
4865         if (rc) {
4866                 class_manual_cleanup(obd);
4867                 mdt->mdt_qmt_dev = NULL;
4868         }
4869 class_detach:
4870         if (rc)
4871                 class_detach(obd, lcfg);
4872 lcfg_cleanup:
4873         lustre_cfg_free(lcfg);
4874 cleanup_mem:
4875         if (bufs)
4876                 OBD_FREE_PTR(bufs);
4877         if (qmtname)
4878                 OBD_FREE(qmtname, MAX_OBD_NAME);
4879         if (uuid)
4880                 OBD_FREE(uuid, UUID_MAX);
4881         if (data)
4882                 OBD_FREE_PTR(data);
4883         return rc;
4884 }
4885
4886 /* Shutdown quota master target associated with mdt */
4887 static void mdt_quota_fini(const struct lu_env *env, struct mdt_device *mdt)
4888 {
4889         ENTRY;
4890
4891         if (mdt->mdt_qmt_exp == NULL)
4892                 RETURN_EXIT;
4893         LASSERT(mdt->mdt_qmt_dev != NULL);
4894
4895         /* the qmt automatically shuts down when the mdt disconnects */
4896         obd_disconnect(mdt->mdt_qmt_exp);
4897         mdt->mdt_qmt_exp = NULL;
4898         mdt->mdt_qmt_dev = NULL;
4899         EXIT;
4900 }
4901
4902 static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
4903 {
4904         struct md_device  *next = m->mdt_child;
4905         struct lu_device  *d    = &m->mdt_md_dev.md_lu_dev;
4906         struct obd_device *obd = mdt2obd_dev(m);
4907         ENTRY;
4908
4909         target_recovery_fini(obd);
4910
4911         ping_evictor_stop();
4912
4913         mdt_stop_ptlrpc_service(m);
4914         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
4915         obd_exports_barrier(obd);
4916         obd_zombie_barrier();
4917
4918         mdt_procfs_fini(m);
4919
4920         tgt_fini(env, &m->mdt_lut);
4921         mdt_fs_cleanup(env, m);
4922         upcall_cache_cleanup(m->mdt_identity_cache);
4923         m->mdt_identity_cache = NULL;
4924
4925         if (m->mdt_namespace != NULL) {
4926                 ldlm_namespace_free(m->mdt_namespace, NULL,
4927                                     d->ld_obd->obd_force);
4928                 d->ld_obd->obd_namespace = m->mdt_namespace = NULL;
4929         }
4930
4931         mdt_quota_fini(env, m);
4932
4933         cfs_free_nidlist(&m->mdt_nosquash_nids);
4934         if (m->mdt_nosquash_str) {
4935                 OBD_FREE(m->mdt_nosquash_str, m->mdt_nosquash_strlen);
4936                 m->mdt_nosquash_str = NULL;
4937                 m->mdt_nosquash_strlen = 0;
4938         }
4939
4940         mdt_seq_fini(env, m);
4941         mdt_seq_fini_cli(m);
4942         mdt_fld_fini(env, m);
4943         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4944
4945         next->md_ops->mdo_init_capa_ctxt(env, next, 0, 0, 0, NULL);
4946         cfs_timer_disarm(&m->mdt_ck_timer);
4947         mdt_ck_thread_stop(m);
4948
4949         /*
4950          * Finish the stack
4951          */
4952         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
4953
4954         LASSERT(cfs_atomic_read(&d->ld_ref) == 0);
4955
4956         server_put_mount(mdt2obd_dev(m)->obd_name, NULL);
4957
4958         EXIT;
4959 }
4960
4961 static int mdt_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
4962 {
4963         struct mdt_device       *m = mdt_dev(obd->obd_lu_dev);
4964         struct sptlrpc_rule_set  tmp_rset;
4965         int                      rc;
4966
4967         sptlrpc_rule_set_init(&tmp_rset);
4968         rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
4969         if (rc) {
4970                 CERROR("mdt %s: failed get sptlrpc rules: %d\n",
4971                        obd->obd_name, rc);
4972                 return rc;
4973         }
4974
4975         sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
4976
4977         write_lock(&m->mdt_sptlrpc_lock);
4978         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4979         m->mdt_sptlrpc_rset = tmp_rset;
4980         write_unlock(&m->mdt_sptlrpc_lock);
4981
4982         return 0;
4983 }
4984
4985 int mdt_postrecov(const struct lu_env *, struct mdt_device *);
4986
4987 static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
4988                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
4989 {
4990         struct mdt_thread_info    *info;
4991         struct obd_device         *obd;
4992         const char                *dev = lustre_cfg_string(cfg, 0);
4993         const char                *num = lustre_cfg_string(cfg, 2);
4994         struct lustre_mount_info  *lmi = NULL;
4995         struct lustre_sb_info     *lsi;
4996         struct lu_site            *s;
4997         struct md_site            *mite;
4998         const char                *identity_upcall = "NONE";
4999         struct md_device          *next;
5000         int                        rc;
5001         int                        node_id;
5002         mntopt_t                   mntopts;
5003         ENTRY;
5004
5005         md_device_init(&m->mdt_md_dev, ldt);
5006         /*
5007          * Environment (env) might be missing mdt_thread_key values at that
5008          * point, if device is allocated when mdt_thread_key is in QUIESCENT
5009          * mode.
5010          *
5011          * Usually device allocation path doesn't use module key values, but
5012          * mdt has to do a lot of work here, so allocate key value.
5013          */
5014         rc = lu_env_refill((struct lu_env *)env);
5015         if (rc != 0)
5016                 RETURN(rc);
5017
5018         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5019         LASSERT(info != NULL);
5020
5021         obd = class_name2obd(dev);
5022         LASSERT(obd != NULL);
5023
5024         m->mdt_max_mdsize = MAX_MD_SIZE; /* 4 stripes */
5025
5026         m->mdt_som_conf = 0;
5027
5028         m->mdt_opts.mo_cos = MDT_COS_DEFAULT;
5029         lmi = server_get_mount(dev);
5030         if (lmi == NULL) {
5031                 CERROR("Cannot get mount info for %s!\n", dev);
5032                 RETURN(-EFAULT);
5033         } else {
5034                 lsi = s2lsi(lmi->lmi_sb);
5035                 /* CMD is supported only in IAM mode */
5036                 LASSERT(num);
5037                 node_id = simple_strtol(num, NULL, 10);
5038                 obd->u.obt.obt_magic = OBT_MAGIC;
5039         }
5040
5041         rwlock_init(&m->mdt_sptlrpc_lock);
5042         sptlrpc_rule_set_init(&m->mdt_sptlrpc_rset);
5043
5044         spin_lock_init(&m->mdt_ioepoch_lock);
5045         m->mdt_opts.mo_compat_resname = 0;
5046         m->mdt_opts.mo_mds_capa = 1;
5047         m->mdt_opts.mo_oss_capa = 1;
5048         m->mdt_capa_timeout = CAPA_TIMEOUT;
5049         m->mdt_capa_alg = CAPA_HMAC_ALG_SHA1;
5050         m->mdt_ck_timeout = CAPA_KEY_TIMEOUT;
5051         m->mdt_squash_uid = 0;
5052         m->mdt_squash_gid = 0;
5053         CFS_INIT_LIST_HEAD(&m->mdt_nosquash_nids);
5054         m->mdt_nosquash_str = NULL;
5055         m->mdt_nosquash_strlen = 0;
5056         init_rwsem(&m->mdt_squash_sem);
5057         spin_lock_init(&m->mdt_osfs_lock);
5058         m->mdt_osfs_age = cfs_time_shift_64(-1000);
5059
5060         m->mdt_md_dev.md_lu_dev.ld_ops = &mdt_lu_ops;
5061         m->mdt_md_dev.md_lu_dev.ld_obd = obd;
5062         /* set this lu_device to obd, because error handling need it */
5063         obd->obd_lu_dev = &m->mdt_md_dev.md_lu_dev;
5064
5065         /* init the stack */
5066         rc = mdt_stack_init((struct lu_env *)env, m, cfg);
5067         if (rc) {
5068                 CERROR("Can't init device stack, rc %d\n", rc);
5069                 GOTO(err_lmi, rc);
5070         }
5071
5072         s = m->mdt_md_dev.md_lu_dev.ld_site;
5073         mite = &m->mdt_mite;
5074         s->ld_md_site = mite;
5075         mite->ms_lu = s;
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 = tgt_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         mdt_adapt_sptlrpc_conf(obd, 1);
5127
5128         next = m->mdt_child;
5129         rc = next->md_ops->mdo_iocontrol(env, next, OBD_IOC_GET_MNTOPT, 0,
5130                                          &mntopts);
5131         if (rc)
5132                 GOTO(err_llog_cleanup, rc);
5133
5134         if (mntopts & MNTOPT_USERXATTR)
5135                 m->mdt_opts.mo_user_xattr = 1;
5136         else
5137                 m->mdt_opts.mo_user_xattr = 0;
5138
5139         if (mntopts & MNTOPT_ACL)
5140                 m->mdt_opts.mo_acl = 1;
5141         else
5142                 m->mdt_opts.mo_acl = 0;
5143
5144         /* XXX: to support suppgid for ACL, we enable identity_upcall
5145          * by default, otherwise, maybe got unexpected -EACCESS. */
5146         if (m->mdt_opts.mo_acl)
5147                 identity_upcall = MDT_IDENTITY_UPCALL_PATH;
5148
5149         m->mdt_identity_cache = upcall_cache_init(obd->obd_name,identity_upcall,
5150                                                 &mdt_identity_upcall_cache_ops);
5151         if (IS_ERR(m->mdt_identity_cache)) {
5152                 rc = PTR_ERR(m->mdt_identity_cache);
5153                 m->mdt_identity_cache = NULL;
5154                 GOTO(err_llog_cleanup, rc);
5155         }
5156
5157         rc = mdt_procfs_init(m, dev);
5158         if (rc) {
5159                 CERROR("Can't init MDT lprocfs, rc %d\n", rc);
5160                 GOTO(err_recovery, rc);
5161         }
5162
5163         rc = mdt_quota_init(env, m, cfg);
5164         if (rc)
5165                 GOTO(err_procfs, rc);
5166
5167         rc = mdt_start_ptlrpc_service(m);
5168         if (rc)
5169                 GOTO(err_quota, rc);
5170
5171         ping_evictor_start();
5172
5173         /* recovery will be started upon mdt_prepare()
5174          * when the whole stack is complete and ready
5175          * to serve the requests */
5176
5177         mdt_init_capa_ctxt(env, m);
5178
5179         /* Reduce the initial timeout on an MDS because it doesn't need such
5180          * a long timeout as an OST does. Adaptive timeouts will adjust this
5181          * value appropriately. */
5182         if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
5183                 ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
5184
5185         RETURN(0);
5186
5187         ping_evictor_stop();
5188         mdt_stop_ptlrpc_service(m);
5189 err_quota:
5190         mdt_quota_fini(env, m);
5191 err_procfs:
5192         mdt_procfs_fini(m);
5193 err_recovery:
5194         target_recovery_fini(obd);
5195         upcall_cache_cleanup(m->mdt_identity_cache);
5196         m->mdt_identity_cache = NULL;
5197 err_llog_cleanup:
5198         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
5199         mdt_fs_cleanup(env, m);
5200 err_capa:
5201         cfs_timer_disarm(&m->mdt_ck_timer);
5202         mdt_ck_thread_stop(m);
5203 err_free_ns:
5204         ldlm_namespace_free(m->mdt_namespace, NULL, 0);
5205         obd->obd_namespace = m->mdt_namespace = NULL;
5206 err_fini_seq:
5207         mdt_seq_fini(env, m);
5208         mdt_fld_fini(env, m);
5209         tgt_fini(env, &m->mdt_lut);
5210 err_fini_stack:
5211         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
5212 err_lmi:
5213         if (lmi)
5214                 server_put_mount(dev, lmi->lmi_mnt);
5215         return (rc);
5216 }
5217
5218 /* For interoperability, the left element is old parameter, the right one
5219  * is the new version of the parameter, if some parameter is deprecated,
5220  * the new version should be set as NULL. */
5221 static struct cfg_interop_param mdt_interop_param[] = {
5222         { "mdt.group_upcall",   NULL },
5223         { "mdt.quota_type",     NULL },
5224         { "mdd.quota_type",     NULL },
5225         { "mdt.rootsquash",     "mdt.root_squash" },
5226         { "mdt.nosquash_nid",   "mdt.nosquash_nids" },
5227         { NULL }
5228 };
5229
5230 /* used by MGS to process specific configurations */
5231 static int mdt_process_config(const struct lu_env *env,
5232                               struct lu_device *d, struct lustre_cfg *cfg)
5233 {
5234         struct mdt_device *m = mdt_dev(d);
5235         struct md_device *md_next = m->mdt_child;
5236         struct lu_device *next = md2lu_dev(md_next);
5237         int rc;
5238         ENTRY;
5239
5240         switch (cfg->lcfg_command) {
5241         case LCFG_PARAM: {
5242                 struct lprocfs_static_vars  lvars;
5243                 struct obd_device          *obd = d->ld_obd;
5244
5245                 /* For interoperability */
5246                 struct cfg_interop_param   *ptr = NULL;
5247                 struct lustre_cfg          *old_cfg = NULL;
5248                 char                       *param = NULL;
5249
5250                 param = lustre_cfg_string(cfg, 1);
5251                 if (param == NULL) {
5252                         CERROR("param is empty\n");
5253                         rc = -EINVAL;
5254                         break;
5255                 }
5256
5257                 ptr = class_find_old_param(param, mdt_interop_param);
5258                 if (ptr != NULL) {
5259                         if (ptr->new_param == NULL) {
5260                                 rc = 0;
5261                                 CWARN("For interoperability, skip this %s."
5262                                       " It is obsolete.\n", ptr->old_param);
5263                                 break;
5264                         }
5265
5266                         CWARN("Found old param %s, changed it to %s.\n",
5267                               ptr->old_param, ptr->new_param);
5268
5269                         old_cfg = cfg;
5270                         cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
5271                         if (IS_ERR(cfg)) {
5272                                 rc = PTR_ERR(cfg);
5273                                 break;
5274                         }
5275                 }
5276
5277                 lprocfs_mdt_init_vars(&lvars);
5278                 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars,
5279                                               cfg, obd);
5280                 if (rc > 0 || rc == -ENOSYS)
5281                         /* we don't understand; pass it on */
5282                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
5283
5284                 if (old_cfg != NULL)
5285                         lustre_cfg_free(cfg);
5286
5287                 break;
5288         }
5289         case LCFG_ADD_MDC:
5290                 /*
5291                  * Add mdc hook to get first MDT uuid and connect it to
5292                  * ls->controller to use for seq manager.
5293                  */
5294                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5295                 if (rc)
5296                         CERROR("Can't add mdc, rc %d\n", rc);
5297                 else
5298                         rc = mdt_seq_init_cli(env, mdt_dev(d), cfg);
5299                 break;
5300         default:
5301                 /* others are passed further */
5302                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
5303                 break;
5304         }
5305         RETURN(rc);
5306 }
5307
5308 static struct lu_object *mdt_object_alloc(const struct lu_env *env,
5309                                           const struct lu_object_header *hdr,
5310                                           struct lu_device *d)
5311 {
5312         struct mdt_object *mo;
5313
5314         ENTRY;
5315
5316         OBD_SLAB_ALLOC_PTR_GFP(mo, mdt_object_kmem, CFS_ALLOC_IO);
5317         if (mo != NULL) {
5318                 struct lu_object *o;
5319                 struct lu_object_header *h;
5320
5321                 o = &mo->mot_obj.mo_lu;
5322                 h = &mo->mot_header;
5323                 lu_object_header_init(h);
5324                 lu_object_init(o, h, d);
5325                 lu_object_add_top(h, o);
5326                 o->lo_ops = &mdt_obj_ops;
5327                 mutex_init(&mo->mot_ioepoch_mutex);
5328                 mutex_init(&mo->mot_lov_mutex);
5329                 RETURN(o);
5330         } else
5331                 RETURN(NULL);
5332 }
5333
5334 static int mdt_object_init(const struct lu_env *env, struct lu_object *o,
5335                            const struct lu_object_conf *unused)
5336 {
5337         struct mdt_device *d = mdt_dev(o->lo_dev);
5338         struct lu_device  *under;
5339         struct lu_object  *below;
5340         int                rc = 0;
5341         ENTRY;
5342
5343         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
5344                PFID(lu_object_fid(o)));
5345
5346         under = &d->mdt_child->md_lu_dev;
5347         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
5348         if (below != NULL) {
5349                 lu_object_add(o, below);
5350         } else
5351                 rc = -ENOMEM;
5352
5353         RETURN(rc);
5354 }
5355
5356 static void mdt_object_free(const struct lu_env *env, struct lu_object *o)
5357 {
5358         struct mdt_object *mo = mdt_obj(o);
5359         struct lu_object_header *h;
5360         ENTRY;
5361
5362         h = o->lo_header;
5363         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
5364                PFID(lu_object_fid(o)));
5365
5366         lu_object_fini(o);
5367         lu_object_header_fini(h);
5368         OBD_SLAB_FREE_PTR(mo, mdt_object_kmem);
5369
5370         EXIT;
5371 }
5372
5373 static int mdt_object_print(const struct lu_env *env, void *cookie,
5374                             lu_printer_t p, const struct lu_object *o)
5375 {
5376         struct mdt_object *mdto = mdt_obj((struct lu_object *)o);
5377         return (*p)(env, cookie, LUSTRE_MDT_NAME"-object@%p(ioepoch="LPU64" "
5378                     "flags="LPX64", epochcount=%d, writecount=%d)",
5379                     mdto, mdto->mot_ioepoch, mdto->mot_flags,
5380                     mdto->mot_ioepoch_count, mdto->mot_writecount);
5381 }
5382
5383 static int mdt_prepare(const struct lu_env *env,
5384                 struct lu_device *pdev,
5385                 struct lu_device *cdev)
5386 {
5387         struct mdt_device *mdt = mdt_dev(cdev);
5388         struct lu_device *next = &mdt->mdt_child->md_lu_dev;
5389         struct obd_device *obd = cdev->ld_obd;
5390         int rc;
5391
5392         ENTRY;
5393
5394         LASSERT(obd);
5395
5396         rc = next->ld_ops->ldo_prepare(env, cdev, next);
5397         if (rc)
5398                 RETURN(rc);
5399
5400         rc = mdt_llog_ctxt_clone(env, mdt, LLOG_CHANGELOG_ORIG_CTXT);
5401         if (rc)
5402                 RETURN(rc);
5403
5404         rc = mdt_fld_init(env, obd->obd_name, mdt);
5405         if (rc)
5406                 RETURN(rc);
5407
5408         rc = mdt_seq_init(env, obd->obd_name, mdt);
5409         if (rc)
5410                 RETURN(rc);
5411
5412         rc = mdt->mdt_child->md_ops->mdo_root_get(env, mdt->mdt_child,
5413                                                   &mdt->mdt_md_root_fid);
5414         if (rc)
5415                 RETURN(rc);
5416
5417         LASSERT(!test_bit(MDT_FL_CFGLOG, &mdt->mdt_state));
5418         target_recovery_init(&mdt->mdt_lut, mdt_recovery_handle);
5419         set_bit(MDT_FL_CFGLOG, &mdt->mdt_state);
5420         LASSERT(obd->obd_no_conn);
5421         spin_lock(&obd->obd_dev_lock);
5422         obd->obd_no_conn = 0;
5423         spin_unlock(&obd->obd_dev_lock);
5424
5425         if (obd->obd_recovering == 0)
5426                 mdt_postrecov(env, mdt);
5427
5428         RETURN(rc);
5429 }
5430
5431 static const struct lu_device_operations mdt_lu_ops = {
5432         .ldo_object_alloc   = mdt_object_alloc,
5433         .ldo_process_config = mdt_process_config,
5434         .ldo_prepare        = mdt_prepare,
5435 };
5436
5437 static const struct lu_object_operations mdt_obj_ops = {
5438         .loo_object_init    = mdt_object_init,
5439         .loo_object_free    = mdt_object_free,
5440         .loo_object_print   = mdt_object_print
5441 };
5442
5443 static int mdt_obd_set_info_async(const struct lu_env *env,
5444                                   struct obd_export *exp,
5445                                   __u32 keylen, void *key,
5446                                   __u32 vallen, void *val,
5447                                   struct ptlrpc_request_set *set)
5448 {
5449         struct obd_device     *obd = exp->exp_obd;
5450         int                    rc;
5451         ENTRY;
5452
5453         LASSERT(obd);
5454
5455         if (KEY_IS(KEY_SPTLRPC_CONF)) {
5456                 rc = mdt_adapt_sptlrpc_conf(obd, 0);
5457                 RETURN(rc);
5458         }
5459
5460         RETURN(0);
5461 }
5462
5463 /**
5464  * Match client and server connection feature flags.
5465  *
5466  * Compute the compatibility flags for a connection request based on
5467  * features mutually supported by client and server.
5468  *
5469  * The obd_export::exp_connect_flags field in \a exp must not be updated
5470  * here, otherwise a partially initialized value may be exposed. After
5471  * the connection request is successfully processed, the top-level MDT
5472  * connect request handler atomically updates the export connect flags
5473  * from the obd_connect_data::ocd_connect_flags field of the reply.
5474  * \see mdt_connect().
5475  *
5476  * \param exp   the obd_export associated with this client/target pair
5477  * \param mdt   the target device for the connection
5478  * \param data  stores data for this connect request
5479  *
5480  * \retval 0       success
5481  * \retval -EPROTO \a data unexpectedly has zero obd_connect_data::ocd_brw_size
5482  * \retval -EBADE  client and server feature requirements are incompatible
5483  */
5484 static int mdt_connect_internal(struct obd_export *exp,
5485                                 struct mdt_device *mdt,
5486                                 struct obd_connect_data *data)
5487 {
5488         LASSERT(data != NULL);
5489
5490         data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
5491         data->ocd_ibits_known &= MDS_INODELOCK_FULL;
5492
5493         /* If no known bits (which should not happen, probably,
5494            as everybody should support LOOKUP and UPDATE bits at least)
5495            revert to compat mode with plain locks. */
5496         if (!data->ocd_ibits_known &&
5497             data->ocd_connect_flags & OBD_CONNECT_IBITS)
5498                 data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
5499
5500         if (!mdt->mdt_opts.mo_acl)
5501                 data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
5502
5503         if (!mdt->mdt_opts.mo_user_xattr)
5504                 data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
5505
5506         if (!mdt->mdt_som_conf)
5507                 data->ocd_connect_flags &= ~OBD_CONNECT_SOM;
5508
5509         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
5510                 data->ocd_brw_size = min(data->ocd_brw_size,
5511                         (__u32)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
5512                 if (data->ocd_brw_size == 0) {
5513                         CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
5514                                " ocd_version: %x ocd_grant: %d "
5515                                "ocd_index: %u ocd_brw_size is "
5516                                "unexpectedly zero, network data "
5517                                "corruption? Refusing connection of this"
5518                                " client\n",
5519                                exp->exp_obd->obd_name,
5520                                exp->exp_client_uuid.uuid,
5521                                exp, data->ocd_connect_flags, data->ocd_version,
5522                                data->ocd_grant, data->ocd_index);
5523                         return -EPROTO;
5524                 }
5525         }
5526
5527         /* NB: Disregard the rule against updating exp_connect_flags in this
5528          * case, since tgt_client_new() needs to know if this is a lightweight
5529          * connection, and it is safe to expose this flag before connection
5530          * processing completes. */
5531         if (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) {
5532                 spin_lock(&exp->exp_lock);
5533                 exp->exp_connect_flags |=  OBD_CONNECT_LIGHTWEIGHT;
5534                 spin_unlock(&exp->exp_lock);
5535         }
5536
5537         data->ocd_version = LUSTRE_VERSION_CODE;
5538         exp->exp_mdt_data.med_ibits_known = data->ocd_ibits_known;
5539
5540         if ((data->ocd_connect_flags & OBD_CONNECT_FID) == 0) {
5541                 CWARN("%s: MDS requires FID support, but client not\n",
5542                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5543                 return -EBADE;
5544         }
5545
5546         if (mdt->mdt_som_conf &&
5547             !(data->ocd_connect_flags & (OBD_CONNECT_MDS_MDS|OBD_CONNECT_SOM))){
5548                 CWARN("%s: MDS has SOM enabled, but client does not support "
5549                       "it\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
5550                 return -EBADE;
5551         }
5552
5553         return 0;
5554 }
5555
5556 static int mdt_connect_check_sptlrpc(struct mdt_device *mdt,
5557                                      struct obd_export *exp,
5558                                      struct ptlrpc_request *req)
5559 {
5560         struct sptlrpc_flavor   flvr;
5561         int                     rc = 0;
5562
5563         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
5564                 read_lock(&mdt->mdt_sptlrpc_lock);
5565                 sptlrpc_target_choose_flavor(&mdt->mdt_sptlrpc_rset,
5566                                              req->rq_sp_from,
5567                                              req->rq_peer.nid,
5568                                              &flvr);
5569                 read_unlock(&mdt->mdt_sptlrpc_lock);
5570
5571                 spin_lock(&exp->exp_lock);
5572
5573                 exp->exp_sp_peer = req->rq_sp_from;
5574                 exp->exp_flvr = flvr;
5575
5576                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
5577                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
5578                         CERROR("unauthorized rpc flavor %x from %s, "
5579                                "expect %x\n", req->rq_flvr.sf_rpc,
5580                                libcfs_nid2str(req->rq_peer.nid),
5581                                exp->exp_flvr.sf_rpc);
5582                         rc = -EACCES;
5583                 }
5584
5585                 spin_unlock(&exp->exp_lock);
5586         } else {
5587                 if (exp->exp_sp_peer != req->rq_sp_from) {
5588                         CERROR("RPC source %s doesn't match %s\n",
5589                                sptlrpc_part2name(req->rq_sp_from),
5590                                sptlrpc_part2name(exp->exp_sp_peer));
5591                         rc = -EACCES;
5592                 } else {
5593                         rc = sptlrpc_target_export_check(exp, req);
5594                 }
5595         }
5596
5597         return rc;
5598 }
5599
5600 /* mds_connect copy */
5601 static int mdt_obd_connect(const struct lu_env *env,
5602                            struct obd_export **exp, struct obd_device *obd,
5603                            struct obd_uuid *cluuid,
5604                            struct obd_connect_data *data,
5605                            void *localdata)
5606 {
5607         struct mdt_thread_info *info;
5608         struct obd_export      *lexp;
5609         struct lustre_handle    conn = { 0 };
5610         struct mdt_device      *mdt;
5611         struct ptlrpc_request  *req;
5612         int                     rc;
5613         ENTRY;
5614
5615         LASSERT(env != NULL);
5616         if (!exp || !obd || !cluuid)
5617                 RETURN(-EINVAL);
5618
5619         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5620         req = info->mti_pill->rc_req;
5621         mdt = mdt_dev(obd->obd_lu_dev);
5622
5623         /*
5624          * first, check whether the stack is ready to handle requests
5625          * XXX: probably not very appropriate method is used now
5626          *      at some point we should find a better one
5627          */
5628         if (!test_bit(MDT_FL_SYNCED, &mdt->mdt_state)) {
5629                 rc = obd_health_check(env, mdt->mdt_child_exp->exp_obd);
5630                 if (rc)
5631                         RETURN(-EAGAIN);
5632                 set_bit(MDT_FL_SYNCED, &mdt->mdt_state);
5633         }
5634
5635         rc = class_connect(&conn, obd, cluuid);
5636         if (rc)
5637                 RETURN(rc);
5638
5639         lexp = class_conn2export(&conn);
5640         LASSERT(lexp != NULL);
5641
5642         rc = mdt_connect_check_sptlrpc(mdt, lexp, req);
5643         if (rc)
5644                 GOTO(out, rc);
5645
5646         if (OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
5647                 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
5648
5649         rc = mdt_connect_internal(lexp, mdt, data);
5650         if (rc == 0) {
5651                 struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
5652
5653                 LASSERT(lcd);
5654                 info->mti_exp = lexp;
5655                 memcpy(lcd->lcd_uuid, cluuid, sizeof lcd->lcd_uuid);
5656                 rc = tgt_client_new(env, lexp);
5657                 if (rc == 0)
5658                         mdt_export_stats_init(obd, lexp, localdata);
5659         }
5660
5661 out:
5662         if (rc != 0) {
5663                 class_disconnect(lexp);
5664                 *exp = NULL;
5665         } else {
5666                 *exp = lexp;
5667         }
5668
5669         RETURN(rc);
5670 }
5671
5672 static int mdt_obd_reconnect(const struct lu_env *env,
5673                              struct obd_export *exp, struct obd_device *obd,
5674                              struct obd_uuid *cluuid,
5675                              struct obd_connect_data *data,
5676                              void *localdata)
5677 {
5678         struct mdt_thread_info *info;
5679         struct mdt_device      *mdt;
5680         struct ptlrpc_request  *req;
5681         int                     rc;
5682         ENTRY;
5683
5684         if (exp == NULL || obd == NULL || cluuid == NULL)
5685                 RETURN(-EINVAL);
5686
5687         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5688         req = info->mti_pill->rc_req;
5689         mdt = mdt_dev(obd->obd_lu_dev);
5690
5691         rc = mdt_connect_check_sptlrpc(mdt, exp, req);
5692         if (rc)
5693                 RETURN(rc);
5694
5695         rc = mdt_connect_internal(exp, mdt_dev(obd->obd_lu_dev), data);
5696         if (rc == 0)
5697                 mdt_export_stats_init(obd, exp, localdata);
5698
5699         RETURN(rc);
5700 }
5701
5702 static int mdt_export_cleanup(struct obd_export *exp)
5703 {
5704         struct mdt_export_data *med = &exp->exp_mdt_data;
5705         struct obd_device      *obd = exp->exp_obd;
5706         struct mdt_device      *mdt;
5707         struct mdt_thread_info *info;
5708         struct lu_env           env;
5709         CFS_LIST_HEAD(closing_list);
5710         struct mdt_file_data *mfd, *n;
5711         int rc = 0;
5712         ENTRY;
5713
5714         spin_lock(&med->med_open_lock);
5715         while (!cfs_list_empty(&med->med_open_head)) {
5716                 cfs_list_t *tmp = med->med_open_head.next;
5717                 mfd = cfs_list_entry(tmp, struct mdt_file_data, mfd_list);
5718
5719                 /* Remove mfd handle so it can't be found again.
5720                  * We are consuming the mfd_list reference here. */
5721                 class_handle_unhash(&mfd->mfd_handle);
5722                 cfs_list_move_tail(&mfd->mfd_list, &closing_list);
5723         }
5724         spin_unlock(&med->med_open_lock);
5725         mdt = mdt_dev(obd->obd_lu_dev);
5726         LASSERT(mdt != NULL);
5727
5728         rc = lu_env_init(&env, LCT_MD_THREAD);
5729         if (rc)
5730                 RETURN(rc);
5731
5732         info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
5733         LASSERT(info != NULL);
5734         memset(info, 0, sizeof *info);
5735         info->mti_env = &env;
5736         info->mti_mdt = mdt;
5737         info->mti_exp = exp;
5738
5739         if (!cfs_list_empty(&closing_list)) {
5740                 struct md_attr *ma = &info->mti_attr;
5741
5742                 /* Close any open files (which may also cause orphan unlinking). */
5743                 cfs_list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
5744                         cfs_list_del_init(&mfd->mfd_list);
5745                         ma->ma_need = ma->ma_valid = 0;
5746                         /* Don't unlink orphan on failover umount, LU-184 */
5747                         if (exp->exp_flags & OBD_OPT_FAILOVER) {
5748                                 ma->ma_valid = MA_FLAGS;
5749                                 ma->ma_attr_flags |= MDS_KEEP_ORPHAN;
5750                         }
5751                         mdt_mfd_close(info, mfd);
5752                 }
5753         }
5754         info->mti_mdt = NULL;
5755         /* cleanup client slot early */
5756         /* Do not erase record for recoverable client. */
5757         if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
5758                 tgt_client_del(&env, exp);
5759         lu_env_fini(&env);
5760
5761         RETURN(rc);
5762 }
5763
5764 static int mdt_obd_disconnect(struct obd_export *exp)
5765 {
5766         int rc;
5767         ENTRY;
5768
5769         LASSERT(exp);
5770         class_export_get(exp);
5771
5772         rc = server_disconnect_export(exp);
5773         if (rc != 0)
5774                 CDEBUG(D_IOCTL, "server disconnect error: %d\n", rc);
5775
5776         rc = mdt_export_cleanup(exp);
5777         class_export_put(exp);
5778         RETURN(rc);
5779 }
5780
5781 /* FIXME: Can we avoid using these two interfaces? */
5782 static int mdt_init_export(struct obd_export *exp)
5783 {
5784         struct mdt_export_data *med = &exp->exp_mdt_data;
5785         int                     rc;
5786         ENTRY;
5787
5788         CFS_INIT_LIST_HEAD(&med->med_open_head);
5789         spin_lock_init(&med->med_open_lock);
5790         mutex_init(&med->med_idmap_mutex);
5791         med->med_idmap = NULL;
5792         spin_lock(&exp->exp_lock);
5793         exp->exp_connecting = 1;
5794         spin_unlock(&exp->exp_lock);
5795
5796         /* self-export doesn't need client data and ldlm initialization */
5797         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5798                                      &exp->exp_client_uuid)))
5799                 RETURN(0);
5800
5801         rc = tgt_client_alloc(exp);
5802         if (rc)
5803                 GOTO(err, rc);
5804
5805         rc = ldlm_init_export(exp);
5806         if (rc)
5807                 GOTO(err_free, rc);
5808
5809         RETURN(rc);
5810
5811 err_free:
5812         tgt_client_free(exp);
5813 err:
5814         CERROR("%s: Failed to initialize export: rc = %d\n",
5815                exp->exp_obd->obd_name, rc);
5816         return rc;
5817 }
5818
5819 static int mdt_destroy_export(struct obd_export *exp)
5820 {
5821         ENTRY;
5822
5823         if (exp_connect_rmtclient(exp))
5824                 mdt_cleanup_idmap(&exp->exp_mdt_data);
5825
5826         target_destroy_export(exp);
5827         /* destroy can be called from failed obd_setup, so
5828          * checking uuid is safer than obd_self_export */
5829         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
5830                                      &exp->exp_client_uuid)))
5831                 RETURN(0);
5832
5833         ldlm_destroy_export(exp);
5834         tgt_client_free(exp);
5835
5836         LASSERT(cfs_list_empty(&exp->exp_outstanding_replies));
5837         LASSERT(cfs_list_empty(&exp->exp_mdt_data.med_open_head));
5838
5839         RETURN(0);
5840 }
5841
5842 static int mdt_rpc_fid2path(struct mdt_thread_info *info, void *key,
5843                             void *val, int vallen)
5844 {
5845         struct mdt_device *mdt = mdt_dev(info->mti_exp->exp_obd->obd_lu_dev);
5846         struct getinfo_fid2path *fpout, *fpin;
5847         int rc = 0;
5848
5849         fpin = key + cfs_size_round(sizeof(KEY_FID2PATH));
5850         fpout = val;
5851
5852         if (ptlrpc_req_need_swab(info->mti_pill->rc_req))
5853                 lustre_swab_fid2path(fpin);
5854
5855         memcpy(fpout, fpin, sizeof(*fpin));
5856         if (fpout->gf_pathlen != vallen - sizeof(*fpin))
5857                 RETURN(-EINVAL);
5858
5859         rc = mdt_fid2path(info->mti_env, mdt, fpout);
5860         RETURN(rc);
5861 }
5862
5863 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
5864                 struct getinfo_fid2path *fp)
5865 {
5866         struct mdt_object *obj;
5867         struct obd_device *obd = mdt2obd_dev(mdt);
5868         int    rc;
5869         ENTRY;
5870
5871         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
5872                 PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
5873
5874         if (!fid_is_sane(&fp->gf_fid))
5875                 RETURN(-EINVAL);
5876
5877         if (!fid_is_norm(&fp->gf_fid) && !fid_is_igif(&fp->gf_fid)) {
5878                 CWARN("%s: "DFID" is invalid, sequence should be "
5879                         ">= "LPX64"\n", obd->obd_name,
5880                         PFID(&fp->gf_fid), (__u64)FID_SEQ_NORMAL);
5881                 RETURN(-EINVAL);
5882         }
5883
5884         obj = mdt_object_find(env, mdt, &fp->gf_fid);
5885         if (obj == NULL || IS_ERR(obj)) {
5886                 CDEBUG(D_IOCTL, "no object "DFID": %ld\n", PFID(&fp->gf_fid),
5887                         PTR_ERR(obj));
5888                 RETURN(-EINVAL);
5889         }
5890
5891         rc = lu_object_exists(&obj->mot_obj.mo_lu);
5892         if (rc <= 0) {
5893                 if (rc == -1)
5894                         rc = -EREMOTE;
5895                 else
5896                         rc = -ENOENT;
5897                 mdt_object_put(env, obj);
5898                 CDEBUG(D_IOCTL, "nonlocal object "DFID": %d\n",
5899                         PFID(&fp->gf_fid), rc);
5900                 RETURN(rc);
5901         }
5902
5903         rc = mo_path(env, md_object_next(&obj->mot_obj), fp->gf_path,
5904                         fp->gf_pathlen, &fp->gf_recno, &fp->gf_linkno);
5905         mdt_object_put(env, obj);
5906
5907         RETURN(rc);
5908 }
5909
5910 static int mdt_get_info(struct mdt_thread_info *info)
5911 {
5912         struct ptlrpc_request *req = mdt_info_req(info);
5913         char *key;
5914         int keylen;
5915         __u32 *vallen;
5916         void *valout;
5917         int rc;
5918         ENTRY;
5919
5920         key = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_KEY);
5921         if (key == NULL) {
5922                 CDEBUG(D_IOCTL, "No GETINFO key");
5923                 RETURN(-EFAULT);
5924         }
5925         keylen = req_capsule_get_size(info->mti_pill, &RMF_GETINFO_KEY,
5926                                       RCL_CLIENT);
5927
5928         vallen = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_VALLEN);
5929         if (vallen == NULL) {
5930                 CDEBUG(D_IOCTL, "Unable to get RMF_GETINFO_VALLEN buffer");
5931                 RETURN(-EFAULT);
5932         }
5933
5934         req_capsule_set_size(info->mti_pill, &RMF_GETINFO_VAL, RCL_SERVER,
5935                              *vallen);
5936         rc = req_capsule_server_pack(info->mti_pill);
5937         valout = req_capsule_server_get(info->mti_pill, &RMF_GETINFO_VAL);
5938         if (valout == NULL) {
5939                 CDEBUG(D_IOCTL, "Unable to get get-info RPC out buffer");
5940                 RETURN(-EFAULT);
5941         }
5942
5943         if (KEY_IS(KEY_FID2PATH))
5944                 rc = mdt_rpc_fid2path(info, key, valout, *vallen);
5945         else
5946                 rc = -EINVAL;
5947
5948         lustre_msg_set_status(req->rq_repmsg, rc);
5949
5950         RETURN(rc);
5951 }
5952
5953 /* Pass the ioc down */
5954 static int mdt_ioc_child(struct lu_env *env, struct mdt_device *mdt,
5955                          unsigned int cmd, int len, void *data)
5956 {
5957         struct lu_context ioctl_session;
5958         struct md_device *next = mdt->mdt_child;
5959         int rc;
5960         ENTRY;
5961
5962         rc = lu_context_init(&ioctl_session, LCT_SESSION);
5963         if (rc)
5964                 RETURN(rc);
5965         ioctl_session.lc_thread = (struct ptlrpc_thread *)cfs_current();
5966         lu_context_enter(&ioctl_session);
5967         env->le_ses = &ioctl_session;
5968
5969         LASSERT(next->md_ops->mdo_iocontrol);
5970         rc = next->md_ops->mdo_iocontrol(env, next, cmd, len, data);
5971
5972         lu_context_exit(&ioctl_session);
5973         lu_context_fini(&ioctl_session);
5974         RETURN(rc);
5975 }
5976
5977 static int mdt_ioc_version_get(struct mdt_thread_info *mti, void *karg)
5978 {
5979         struct obd_ioctl_data *data = karg;
5980         struct lu_fid *fid = (struct lu_fid *)data->ioc_inlbuf1;
5981         __u64 version;
5982         struct mdt_object *obj;
5983         struct mdt_lock_handle  *lh;
5984         int rc;
5985         ENTRY;
5986
5987         CDEBUG(D_IOCTL, "getting version for "DFID"\n", PFID(fid));
5988         if (!fid_is_sane(fid))
5989                 RETURN(-EINVAL);
5990
5991         lh = &mti->mti_lh[MDT_LH_PARENT];
5992         mdt_lock_reg_init(lh, LCK_CR);
5993
5994         obj = mdt_object_find_lock(mti, fid, lh, MDS_INODELOCK_UPDATE);
5995         if (IS_ERR(obj))
5996                 RETURN(PTR_ERR(obj));
5997
5998         rc = mdt_object_exists(obj);
5999         if (rc < 0) {
6000                 rc = -EREMOTE;
6001                 /**
6002                  * before calling version get the correct MDS should be
6003                  * fid, this is error to find remote object here
6004                  */
6005                 CERROR("nonlocal object "DFID"\n", PFID(fid));
6006         } else if (rc == 0) {
6007                 *(__u64 *)data->ioc_inlbuf2 = ENOENT_VERSION;
6008                 rc = -ENOENT;
6009         } else {
6010                 version = dt_version_get(mti->mti_env, mdt_obj2dt(obj));
6011                *(__u64 *)data->ioc_inlbuf2 = version;
6012                 rc = 0;
6013         }
6014         mdt_object_unlock_put(mti, obj, lh, 1);
6015         RETURN(rc);
6016 }
6017
6018 /* ioctls on obd dev */
6019 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
6020                          void *karg, void *uarg)
6021 {
6022         struct lu_env      env;
6023         struct obd_device *obd = exp->exp_obd;
6024         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
6025         struct dt_device  *dt = mdt->mdt_bottom;
6026         int rc;
6027
6028         ENTRY;
6029         CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
6030         rc = lu_env_init(&env, LCT_MD_THREAD);
6031         if (rc)
6032                 RETURN(rc);
6033
6034         switch (cmd) {
6035         case OBD_IOC_SYNC:
6036                 rc = mdt_device_sync(&env, mdt);
6037                 break;
6038         case OBD_IOC_SET_READONLY:
6039                 rc = dt->dd_ops->dt_ro(&env, dt);
6040                 break;
6041         case OBD_IOC_ABORT_RECOVERY:
6042                 CERROR("Aborting recovery for device %s\n", obd->obd_name);
6043                 target_stop_recovery_thread(obd);
6044                 rc = 0;
6045                 break;
6046         case OBD_IOC_CHANGELOG_REG:
6047         case OBD_IOC_CHANGELOG_DEREG:
6048         case OBD_IOC_CHANGELOG_CLEAR:
6049                 rc = mdt_ioc_child(&env, mdt, cmd, len, karg);
6050                 break;
6051         case OBD_IOC_START_LFSCK:
6052         case OBD_IOC_STOP_LFSCK: {
6053                 struct md_device *next = mdt->mdt_child;
6054                 struct obd_ioctl_data *data = karg;
6055
6056                 if (unlikely(data == NULL)) {
6057                         rc = -EINVAL;
6058                         break;
6059                 }
6060
6061                 rc = next->md_ops->mdo_iocontrol(&env, next, cmd,
6062                                                  data->ioc_inllen1,
6063                                                  data->ioc_inlbuf1);
6064                 break;
6065         }
6066         case OBD_IOC_GET_OBJ_VERSION: {
6067                 struct mdt_thread_info *mti;
6068                 mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
6069                 memset(mti, 0, sizeof *mti);
6070                 mti->mti_env = &env;
6071                 mti->mti_mdt = mdt;
6072                 mti->mti_exp = exp;
6073
6074                 rc = mdt_ioc_version_get(mti, karg);
6075                 break;
6076         }
6077         default:
6078                 CERROR("Not supported cmd = %d for device %s\n",
6079                        cmd, obd->obd_name);
6080                 rc = -EOPNOTSUPP;
6081         }
6082
6083         lu_env_fini(&env);
6084         RETURN(rc);
6085 }
6086
6087 int mdt_postrecov(const struct lu_env *env, struct mdt_device *mdt)
6088 {
6089         struct lu_device *ld = md2lu_dev(mdt->mdt_child);
6090         int rc;
6091         ENTRY;
6092
6093         rc = ld->ld_ops->ldo_recovery_complete(env, ld);
6094         RETURN(rc);
6095 }
6096
6097 int mdt_obd_postrecov(struct obd_device *obd)
6098 {
6099         struct lu_env env;
6100         int rc;
6101
6102         rc = lu_env_init(&env, LCT_MD_THREAD);
6103         if (rc)
6104                 RETURN(rc);
6105         rc = mdt_postrecov(&env, mdt_dev(obd->obd_lu_dev));
6106         lu_env_fini(&env);
6107         return rc;
6108 }
6109
6110 /**
6111  * Send a copytool req to a client
6112  * Note this sends a request RPC from a server (MDT) to a client (MDC),
6113  * backwards of normal comms.
6114  */
6115 int mdt_hsm_copytool_send(struct obd_export *exp)
6116 {
6117         struct kuc_hdr *lh;
6118         struct hsm_action_list *hal;
6119         struct hsm_action_item *hai;
6120         int rc, len;
6121         ENTRY;
6122
6123         CWARN("%s: writing to mdc at %s\n", exp->exp_obd->obd_name,
6124               libcfs_nid2str(exp->exp_connection->c_peer.nid));
6125
6126         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
6127                 /* for mockup below */ 2 * cfs_size_round(sizeof(*hai));
6128         OBD_ALLOC(lh, len);
6129         if (lh == NULL)
6130                 RETURN(-ENOMEM);
6131
6132         lh->kuc_magic = KUC_MAGIC;
6133         lh->kuc_transport = KUC_TRANSPORT_HSM;
6134         lh->kuc_msgtype = HMT_ACTION_LIST;
6135         lh->kuc_msglen = len;
6136
6137         hal = (struct hsm_action_list *)(lh + 1);
6138         hal->hal_version = HAL_VERSION;
6139         hal->hal_archive_num = 1;
6140         obd_uuid2fsname(hal->hal_fsname, exp->exp_obd->obd_name,
6141                         MTI_NAME_MAXLEN);
6142
6143         /* mock up an action list */
6144         hal->hal_count = 2;
6145         hai = hai_zero(hal);
6146         hai->hai_action = HSMA_ARCHIVE;
6147         hai->hai_fid.f_oid = 0xA00A;
6148         hai->hai_len = sizeof(*hai);
6149         hai = hai_next(hai);
6150         hai->hai_action = HSMA_RESTORE;
6151         hai->hai_fid.f_oid = 0xB00B;
6152         hai->hai_len = sizeof(*hai);
6153
6154         /* Uses the ldlm reverse import; this rpc will be seen by
6155           the ldlm_callback_handler */
6156         rc = do_set_info_async(exp->exp_imp_reverse,
6157                                LDLM_SET_INFO, LUSTRE_OBD_VERSION,
6158                                sizeof(KEY_HSM_COPYTOOL_SEND),
6159                                KEY_HSM_COPYTOOL_SEND,
6160                                len, lh, NULL);
6161
6162         OBD_FREE(lh, len);
6163
6164         RETURN(rc);
6165 }
6166
6167 static struct obd_ops mdt_obd_device_ops = {
6168         .o_owner          = THIS_MODULE,
6169         .o_set_info_async = mdt_obd_set_info_async,
6170         .o_connect        = mdt_obd_connect,
6171         .o_reconnect      = mdt_obd_reconnect,
6172         .o_disconnect     = mdt_obd_disconnect,
6173         .o_init_export    = mdt_init_export,
6174         .o_destroy_export = mdt_destroy_export,
6175         .o_iocontrol      = mdt_iocontrol,
6176         .o_postrecov      = mdt_obd_postrecov,
6177 };
6178
6179 static struct lu_device* mdt_device_fini(const struct lu_env *env,
6180                                          struct lu_device *d)
6181 {
6182         struct mdt_device *m = mdt_dev(d);
6183         ENTRY;
6184
6185         mdt_fini(env, m);
6186         RETURN(NULL);
6187 }
6188
6189 static struct lu_device *mdt_device_free(const struct lu_env *env,
6190                                          struct lu_device *d)
6191 {
6192         struct mdt_device *m = mdt_dev(d);
6193         ENTRY;
6194
6195         md_device_fini(&m->mdt_md_dev);
6196         OBD_FREE_PTR(m);
6197         RETURN(NULL);
6198 }
6199
6200 static struct lu_device *mdt_device_alloc(const struct lu_env *env,
6201                                           struct lu_device_type *t,
6202                                           struct lustre_cfg *cfg)
6203 {
6204         struct lu_device  *l;
6205         struct mdt_device *m;
6206
6207         OBD_ALLOC_PTR(m);
6208         if (m != NULL) {
6209                 int rc;
6210
6211                 l = &m->mdt_md_dev.md_lu_dev;
6212                 rc = mdt_init0(env, m, t, cfg);
6213                 if (rc != 0) {
6214                         mdt_device_free(env, l);
6215                         l = ERR_PTR(rc);
6216                         return l;
6217                 }
6218         } else
6219                 l = ERR_PTR(-ENOMEM);
6220         return l;
6221 }
6222
6223 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
6224 LU_KEY_INIT(mdt, struct mdt_thread_info);
6225
6226 static void mdt_key_fini(const struct lu_context *ctx,
6227                          struct lu_context_key *key, void* data)
6228 {
6229         struct mdt_thread_info *info = data;
6230
6231         if (info->mti_big_lmm) {
6232                 OBD_FREE_LARGE(info->mti_big_lmm, info->mti_big_lmmsize);
6233                 info->mti_big_lmm = NULL;
6234                 info->mti_big_lmmsize = 0;
6235         }
6236         OBD_FREE_PTR(info);
6237 }
6238
6239 /* context key: mdt_thread_key */
6240 LU_CONTEXT_KEY_DEFINE(mdt, LCT_MD_THREAD);
6241
6242 struct lu_ucred *mdt_ucred(const struct mdt_thread_info *info)
6243 {
6244         return lu_ucred(info->mti_env);
6245 }
6246
6247 struct lu_ucred *mdt_ucred_check(const struct mdt_thread_info *info)
6248 {
6249         return lu_ucred_check(info->mti_env);
6250 }
6251
6252 /**
6253  * Enable/disable COS (Commit On Sharing).
6254  *
6255  * Set/Clear the COS flag in mdt options.
6256  *
6257  * \param mdt mdt device
6258  * \param val 0 disables COS, other values enable COS
6259  */
6260 void mdt_enable_cos(struct mdt_device *mdt, int val)
6261 {
6262         struct lu_env env;
6263         int rc;
6264
6265         mdt->mdt_opts.mo_cos = !!val;
6266         rc = lu_env_init(&env, LCT_LOCAL);
6267         if (unlikely(rc != 0)) {
6268                 CWARN("lu_env initialization failed with rc = %d,"
6269                       "cannot sync\n", rc);
6270                 return;
6271         }
6272         mdt_device_sync(&env, mdt);
6273         lu_env_fini(&env);
6274 }
6275
6276 /**
6277  * Check COS (Commit On Sharing) status.
6278  *
6279  * Return COS flag status.
6280  *
6281  * \param mdt mdt device
6282  */
6283 int mdt_cos_is_enabled(struct mdt_device *mdt)
6284 {
6285         return mdt->mdt_opts.mo_cos != 0;
6286 }
6287
6288 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
6289 LU_TYPE_INIT_FINI(mdt, &mdt_thread_key);
6290
6291 static struct lu_device_type_operations mdt_device_type_ops = {
6292         .ldto_init = mdt_type_init,
6293         .ldto_fini = mdt_type_fini,
6294
6295         .ldto_start = mdt_type_start,
6296         .ldto_stop  = mdt_type_stop,
6297
6298         .ldto_device_alloc = mdt_device_alloc,
6299         .ldto_device_free  = mdt_device_free,
6300         .ldto_device_fini  = mdt_device_fini
6301 };
6302
6303 static struct lu_device_type mdt_device_type = {
6304         .ldt_tags     = LU_DEVICE_MD,
6305         .ldt_name     = LUSTRE_MDT_NAME,
6306         .ldt_ops      = &mdt_device_type_ops,
6307         .ldt_ctx_tags = LCT_MD_THREAD
6308 };
6309
6310 static int __init mdt_mod_init(void)
6311 {
6312         struct lprocfs_static_vars lvars;
6313         int rc;
6314
6315         rc = lu_kmem_init(mdt_caches);
6316         if (rc)
6317                 return rc;
6318
6319         if (mdt_num_threads != 0 && mds_num_threads == 0) {
6320                 LCONSOLE_INFO("mdt_num_threads module parameter is deprecated,"
6321                               "use mds_num_threads instead or unset both for"
6322                               "dynamic thread startup\n");
6323                 mds_num_threads = mdt_num_threads;
6324         }
6325
6326         lprocfs_mdt_init_vars(&lvars);
6327         rc = class_register_type(&mdt_obd_device_ops, NULL,
6328                                  lvars.module_vars, LUSTRE_MDT_NAME,
6329                                  &mdt_device_type);
6330
6331         if (rc)
6332                 lu_kmem_fini(mdt_caches);
6333         return rc;
6334 }
6335
6336 static void __exit mdt_mod_exit(void)
6337 {
6338         class_unregister_type(LUSTRE_MDT_NAME);
6339         lu_kmem_fini(mdt_caches);
6340 }
6341
6342 #define DEFINE_RPC_HANDLER(base, flags, opc, fn, fmt)                   \
6343 [opc - base] = {                                                        \
6344         .mh_name        = #opc,                                         \
6345         .mh_fail_id     = OBD_FAIL_ ## opc ## _NET,                     \
6346         .mh_opc         = opc,                                          \
6347         .mh_flags       = flags,                                        \
6348         .mh_act         = fn,                                           \
6349         .mh_fmt         = fmt                                           \
6350 }
6351
6352 /* Request with a format known in advance */
6353 #define DEF_MDT_HDL(flags, name, fn)                                    \
6354         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, &RQF_ ## name)
6355
6356 /* Request with a format we do not yet know */
6357 #define DEF_MDT_HDL_VAR(flags, name, fn)                                \
6358         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, NULL)
6359
6360 /* Map one non-standard request format handler.  This should probably get
6361  * a common OBD_SET_INFO RPC opcode instead of this mismatch. */
6362 #define RQF_MDS_SET_INFO RQF_OBD_SET_INFO
6363
6364 static struct mdt_handler mdt_mds_ops[] = {
6365 DEF_MDT_HDL(0,                          MDS_CONNECT,      mdt_connect),
6366 DEF_MDT_HDL(0,                          MDS_DISCONNECT,   mdt_disconnect),
6367 DEF_MDT_HDL(0,                          MDS_SET_INFO,     mdt_set_info),
6368 DEF_MDT_HDL(0,                          MDS_GET_INFO,     mdt_get_info),
6369 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_GETSTATUS,    mdt_getstatus),
6370 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETATTR,      mdt_getattr),
6371 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_GETATTR_NAME, mdt_getattr_name),
6372 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETXATTR,     mdt_getxattr),
6373 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_STATFS,       mdt_statfs),
6374 DEF_MDT_HDL(0           | MUTABOR,      MDS_REINT,        mdt_reint),
6375 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
6376 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
6377 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_PIN,          mdt_pin),
6378 DEF_MDT_HDL_VAR(0,                      MDS_SYNC,         mdt_sync),
6379 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_IS_SUBDIR,    mdt_is_subdir),
6380 DEF_MDT_HDL(0,                          MDS_QUOTACHECK,   mdt_quotacheck),
6381 DEF_MDT_HDL(0,                          MDS_QUOTACTL,     mdt_quotactl)
6382 };
6383
6384 #define DEF_OBD_HDL(flags, name, fn)                                    \
6385         DEFINE_RPC_HANDLER(OBD_PING, flags, name, fn, NULL)
6386
6387 static struct mdt_handler mdt_obd_ops[] = {
6388 DEF_OBD_HDL(0,                          OBD_PING,         mdt_obd_ping),
6389 DEF_OBD_HDL(0,                          OBD_LOG_CANCEL,   mdt_obd_log_cancel),
6390 DEF_OBD_HDL(0,                          OBD_QC_CALLBACK,  mdt_obd_qc_callback),
6391 DEF_OBD_HDL(0,                          OBD_IDX_READ,     mdt_obd_idx_read)
6392 };
6393
6394 #define DEF_DLM_HDL_VAR(flags, name, fn)                                \
6395         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, NULL)
6396 #define DEF_DLM_HDL(flags, name, fn)                                    \
6397         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, &RQF_ ## name)
6398
6399 static struct mdt_handler mdt_dlm_ops[] = {
6400 DEF_DLM_HDL    (HABEO_CLAVIS,           LDLM_ENQUEUE,     mdt_enqueue),
6401 DEF_DLM_HDL_VAR(HABEO_CLAVIS,           LDLM_CONVERT,     mdt_convert),
6402 DEF_DLM_HDL_VAR(0,                      LDLM_BL_CALLBACK, mdt_bl_callback),
6403 DEF_DLM_HDL_VAR(0,                      LDLM_CP_CALLBACK, mdt_cp_callback)
6404 };
6405
6406 #define DEF_LLOG_HDL(flags, name, fn)                                   \
6407         DEFINE_RPC_HANDLER(LLOG_ORIGIN_HANDLE_CREATE, flags, name, fn, NULL)
6408
6409 static struct mdt_handler mdt_llog_ops[] = {
6410 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CREATE,        mdt_llog_create),
6411 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_NEXT_BLOCK,    mdt_llog_next_block),
6412 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_READ_HEADER,   mdt_llog_read_header),
6413 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_WRITE_REC,     NULL),
6414 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CLOSE,         NULL),
6415 DEF_LLOG_HDL(0,         LLOG_ORIGIN_CONNECT,              NULL),
6416 DEF_LLOG_HDL(0,         LLOG_CATINFO,                     NULL),
6417 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_PREV_BLOCK,    mdt_llog_prev_block),
6418 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_DESTROY,       mdt_llog_destroy),
6419 };
6420
6421 #define DEF_SEC_HDL(flags, name, fn)                                    \
6422         DEFINE_RPC_HANDLER(SEC_CTX_INIT, flags, name, fn, NULL)
6423
6424 static struct mdt_handler mdt_sec_ctx_ops[] = {
6425 DEF_SEC_HDL(0,                          SEC_CTX_INIT,     mdt_sec_ctx_handle),
6426 DEF_SEC_HDL(0,                          SEC_CTX_INIT_CONT,mdt_sec_ctx_handle),
6427 DEF_SEC_HDL(0,                          SEC_CTX_FINI,     mdt_sec_ctx_handle)
6428 };
6429
6430 #define DEF_QUOTA_HDL(flags, name, fn)                          \
6431         DEFINE_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name)
6432
6433 static struct mdt_handler mdt_quota_ops[] = {
6434 DEF_QUOTA_HDL(HABEO_REFERO,             QUOTA_DQACQ,      mdt_quota_dqacq),
6435 };
6436
6437 static struct mdt_opc_slice mdt_regular_handlers[] = {
6438         {
6439                 .mos_opc_start = MDS_GETATTR,
6440                 .mos_opc_end   = MDS_LAST_OPC,
6441                 .mos_hs        = mdt_mds_ops
6442         },
6443         {
6444                 .mos_opc_start = OBD_PING,
6445                 .mos_opc_end   = OBD_LAST_OPC,
6446                 .mos_hs        = mdt_obd_ops
6447         },
6448         {
6449                 .mos_opc_start = LDLM_ENQUEUE,
6450                 .mos_opc_end   = LDLM_LAST_OPC,
6451                 .mos_hs        = mdt_dlm_ops
6452         },
6453         {
6454                 .mos_opc_start = LLOG_ORIGIN_HANDLE_CREATE,
6455                 .mos_opc_end   = LLOG_LAST_OPC,
6456                 .mos_hs        = mdt_llog_ops
6457         },
6458         {
6459                 .mos_opc_start = SEC_CTX_INIT,
6460                 .mos_opc_end   = SEC_LAST_OPC,
6461                 .mos_hs        = mdt_sec_ctx_ops
6462         },
6463         {
6464                 .mos_opc_start = QUOTA_DQACQ,
6465                 .mos_opc_end   = QUOTA_LAST_OPC,
6466                 .mos_hs        = mdt_quota_ops
6467         },
6468         {
6469                 .mos_hs        = NULL
6470         }
6471 };
6472
6473 /* Readpage/readdir handlers */
6474 static struct mdt_handler mdt_readpage_ops[] = {
6475 DEF_MDT_HDL(0,                  MDS_CONNECT,  mdt_connect),
6476 DEF_MDT_HDL(HABEO_CORPUS | HABEO_REFERO, MDS_READPAGE, mdt_readpage),
6477 /* XXX: this is ugly and should be fixed one day, see mdc_close() for
6478  * detailed comments. --umka */
6479 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
6480 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
6481 };
6482
6483 static struct mdt_opc_slice mdt_readpage_handlers[] = {
6484         {
6485                 .mos_opc_start = MDS_GETATTR,
6486                 .mos_opc_end   = MDS_LAST_OPC,
6487                 .mos_hs        = mdt_readpage_ops
6488         },
6489         {
6490                 .mos_opc_start = OBD_FIRST_OPC,
6491                 .mos_opc_end   = OBD_LAST_OPC,
6492                 .mos_hs        = mdt_obd_ops
6493         },
6494         {
6495                 .mos_hs        = NULL
6496         }
6497 };
6498
6499 /* Cross MDT operation handlers for DNE */
6500 static struct mdt_handler mdt_xmds_ops[] = {
6501 DEF_MDT_HDL(0,                          MDS_CONNECT,      mdt_connect),
6502 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETATTR,      mdt_getattr),
6503 DEF_MDT_HDL(0           | MUTABOR,      MDS_REINT,        mdt_reint),
6504 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_IS_SUBDIR,    mdt_is_subdir),
6505 };
6506
6507 static struct mdt_opc_slice mdt_xmds_handlers[] = {
6508         {
6509                 .mos_opc_start = MDS_GETATTR,
6510                 .mos_opc_end   = MDS_LAST_OPC,
6511                 .mos_hs        = mdt_xmds_ops
6512         },
6513         {
6514                 .mos_opc_start = OBD_PING,
6515                 .mos_opc_end   = OBD_LAST_OPC,
6516                 .mos_hs        = mdt_obd_ops
6517         },
6518         {
6519                 .mos_opc_start = SEC_CTX_INIT,
6520                 .mos_opc_end   = SEC_LAST_OPC,
6521                 .mos_hs        = mdt_sec_ctx_ops
6522         },
6523         {
6524                 .mos_hs        = NULL
6525         }
6526 };
6527
6528 /* Sequence service handlers */
6529 #define DEF_SEQ_HDL(flags, name, fn)                                    \
6530         DEFINE_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name)
6531
6532 static struct mdt_handler mdt_seq_ops[] = {
6533 DEF_SEQ_HDL(0,                          SEQ_QUERY,        (void *)seq_query),
6534 };
6535
6536 static struct mdt_opc_slice mdt_seq_handlers[] = {
6537         {
6538                 .mos_opc_start = SEQ_QUERY,
6539                 .mos_opc_end   = SEQ_LAST_OPC,
6540                 .mos_hs        = mdt_seq_ops
6541         },
6542         {
6543                 .mos_hs        = NULL
6544         }
6545 };
6546
6547 /* FID Location Database handlers */
6548 #define DEF_FLD_HDL(flags, name, fn)                                    \
6549         DEFINE_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name)
6550
6551 static struct mdt_handler mdt_fld_ops[] = {
6552 DEF_FLD_HDL(0,                          FLD_QUERY,        (void *)fld_query),
6553 };
6554
6555 static struct mdt_opc_slice mdt_fld_handlers[] = {
6556         {
6557                 .mos_opc_start = FLD_QUERY,
6558                 .mos_opc_end   = FLD_LAST_OPC,
6559                 .mos_hs        = mdt_fld_ops
6560         },
6561         {
6562                 .mos_hs        = NULL
6563         }
6564 };
6565
6566 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6567 MODULE_DESCRIPTION("Lustre Metadata Target ("LUSTRE_MDT_NAME")");
6568 MODULE_LICENSE("GPL");
6569
6570 cfs_module(mdt, LUSTRE_VERSION_STRING, mdt_mod_init, mdt_mod_exit);