lustre/mdt/mdt_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifndef EXPORT_SYMTAB
  50 # define EXPORT_SYMTAB
  51 #endif
  52 #define DEBUG_SUBSYSTEM S_MDS
  53
  54 #include <linux/module.h>
  55 /*
  56  * struct OBD_{ALLOC,FREE}*()
  57  */
  58 #include <obd_support.h>
  59 /* struct ptlrpc_request */
  60 #include <lustre_net.h>
  61 /* struct obd_export */
  62 #include <lustre_export.h>
  63 /* struct obd_device */
  64 #include <obd.h>
  65 /* lu2dt_dev() */
  66 #include <dt_object.h>
  67 #include <lustre_mds.h>
  68 #include <lustre_mdt.h>
  69 #include "mdt_internal.h"
  70 #ifdef HAVE_QUOTA_SUPPORT
  71 # include <lustre_quota.h>
  72 #endif
  73 #include <lustre_acl.h>
  74 #include <lustre_param.h>
  75 #include <lustre_fsfilt.h>
  76
  77 mdl_mode_t mdt_mdl_lock_modes[] = {
  78         [LCK_MINMODE] = MDL_MINMODE,
  79         [LCK_EX]      = MDL_EX,
  80         [LCK_PW]      = MDL_PW,
  81         [LCK_PR]      = MDL_PR,
  82         [LCK_CW]      = MDL_CW,
  83         [LCK_CR]      = MDL_CR,
  84         [LCK_NL]      = MDL_NL,
  85         [LCK_GROUP]   = MDL_GROUP
  86 };
  87
  88 ldlm_mode_t mdt_dlm_lock_modes[] = {
  89         [MDL_MINMODE] = LCK_MINMODE,
  90         [MDL_EX]      = LCK_EX,
  91         [MDL_PW]      = LCK_PW,
  92         [MDL_PR]      = LCK_PR,
  93         [MDL_CW]      = LCK_CW,
  94         [MDL_CR]      = LCK_CR,
  95         [MDL_NL]      = LCK_NL,
  96         [MDL_GROUP]   = LCK_GROUP
  97 };
  98
  99 /*
 100  * Initialized in mdt_mod_init().
 101  */
 102 unsigned long mdt_num_threads;
 103
 104 /* ptlrpc request handler for MDT. All handlers are
 105  * grouped into several slices - struct mdt_opc_slice,
 106  * and stored in an array - mdt_handlers[].
 107  */
 108 struct mdt_handler {
 109         /* The name of this handler. */
 110         const char *mh_name;
 111         /* Fail id for this handler, checked at the beginning of this handler*/
 112         int         mh_fail_id;
 113         /* Operation code for this handler */
 114         __u32       mh_opc;
 115         /* flags are listed in enum mdt_handler_flags below. */
 116         __u32       mh_flags;
 117         /* The actual handler function to execute. */
 118         int (*mh_act)(struct mdt_thread_info *info);
 119         /* Request format for this request. */
 120         const struct req_format *mh_fmt;
 121 };
 122
 123 enum mdt_handler_flags {
 124         /*
 125          * struct mdt_body is passed in the incoming message, and object
 126          * identified by this fid exists on disk.
 127          *
 128          * "habeo corpus" == "I have a body"
 129          */
 130         HABEO_CORPUS = (1 << 0),
 131         /*
 132          * struct ldlm_request is passed in the incoming message.
 133          *
 134          * "habeo clavis" == "I have a key"
 135          */
 136         HABEO_CLAVIS = (1 << 1),
 137         /*
 138          * this request has fixed reply format, so that reply message can be
 139          * packed by generic code.
 140          *
 141          * "habeo refero" == "I have a reply"
 142          */
 143         HABEO_REFERO = (1 << 2),
 144         /*
 145          * this request will modify something, so check whether the filesystem
 146          * is readonly or not, then return -EROFS to client asap if necessary.
 147          *
 148          * "mutabor" == "I shall modify"
 149          */
 150         MUTABOR      = (1 << 3)
 151 };
 152
 153 struct mdt_opc_slice {
 154         __u32               mos_opc_start;
 155         int                 mos_opc_end;
 156         struct mdt_handler *mos_hs;
 157 };
 158
 159 static struct mdt_opc_slice mdt_regular_handlers[];
 160 static struct mdt_opc_slice mdt_readpage_handlers[];
 161 static struct mdt_opc_slice mdt_xmds_handlers[];
 162 static struct mdt_opc_slice mdt_seq_handlers[];
 163 static struct mdt_opc_slice mdt_fld_handlers[];
 164
 165 static struct mdt_device *mdt_dev(struct lu_device *d);
 166 static int mdt_regular_handle(struct ptlrpc_request *req);
 167 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags);
 168 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
 169                         struct getinfo_fid2path *fp);
 170
 171 static const struct lu_object_operations mdt_obj_ops;
 172
 173 int mdt_get_disposition(struct ldlm_reply *rep, int flag)
 174 {
 175         if (!rep)
 176                 return 0;
 177         return (rep->lock_policy_res1 & flag);
 178 }
 179
 180 void mdt_clear_disposition(struct mdt_thread_info *info,
 181                            struct ldlm_reply *rep, int flag)
 182 {
 183         if (info)
 184                 info->mti_opdata &= ~flag;
 185         if (rep)
 186                 rep->lock_policy_res1 &= ~flag;
 187 }
 188
 189 void mdt_set_disposition(struct mdt_thread_info *info,
 190                          struct ldlm_reply *rep, int flag)
 191 {
 192         if (info)
 193                 info->mti_opdata |= flag;
 194         if (rep)
 195                 rep->lock_policy_res1 |= flag;
 196 }
 197
 198 void mdt_lock_reg_init(struct mdt_lock_handle *lh, ldlm_mode_t lm)
 199 {
 200         lh->mlh_pdo_hash = 0;
 201         lh->mlh_reg_mode = lm;
 202         lh->mlh_type = MDT_REG_LOCK;
 203 }
 204
 205 void mdt_lock_pdo_init(struct mdt_lock_handle *lh, ldlm_mode_t lm,
 206                        const char *name, int namelen)
 207 {
 208         lh->mlh_reg_mode = lm;
 209         lh->mlh_type = MDT_PDO_LOCK;
 210
 211         if (name != NULL) {
 212                 LASSERT(namelen > 0);
 213                 lh->mlh_pdo_hash = full_name_hash(name, namelen);
 214         } else {
 215                 LASSERT(namelen == 0);
 216                 lh->mlh_pdo_hash = 0ull;
 217         }
 218 }
 219
 220 static void mdt_lock_pdo_mode(struct mdt_thread_info *info, struct mdt_object *o,
 221                               struct mdt_lock_handle *lh)
 222 {
 223         mdl_mode_t mode;
 224         ENTRY;
 225
 226         /*
 227          * Any dir access needs couple of locks:
 228          *
 229          * 1) on part of dir we gonna take lookup/modify;
 230          *
 231          * 2) on whole dir to protect it from concurrent splitting and/or to
 232          * flush client's cache for readdir().
 233          *
 234          * so, for a given mode and object this routine decides what lock mode
 235          * to use for lock #2:
 236          *
 237          * 1) if caller's gonna lookup in dir then we need to protect dir from
 238          * being splitted only - LCK_CR
 239          *
 240          * 2) if caller's gonna modify dir then we need to protect dir from
 241          * being splitted and to flush cache - LCK_CW
 242          *
 243          * 3) if caller's gonna modify dir and that dir seems ready for
 244          * splitting then we need to protect it from any type of access
 245          * (lookup/modify/split) - LCK_EX --bzzz
 246          */
 247
 248         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
 249         LASSERT(lh->mlh_pdo_mode == LCK_MINMODE);
 250
 251         /*
 252          * Ask underlaying level its opinion about preferable PDO lock mode
 253          * having access type passed as regular lock mode:
 254          *
 255          * - MDL_MINMODE means that lower layer does not want to specify lock
 256          * mode;
 257          *
 258          * - MDL_NL means that no PDO lock should be taken. This is used in some
 259          * cases. Say, for non-splittable directories no need to use PDO locks
 260          * at all.
 261          */
 262         mode = mdo_lock_mode(info->mti_env, mdt_object_child(o),
 263                              mdt_dlm_mode2mdl_mode(lh->mlh_reg_mode));
 264
 265         if (mode != MDL_MINMODE) {
 266                 lh->mlh_pdo_mode = mdt_mdl_mode2dlm_mode(mode);
 267         } else {
 268                 /*
 269                  * Lower layer does not want to specify locking mode. We do it
 270                  * our selves. No special protection is needed, just flush
 271                  * client's cache on modification and allow concurrent
 272                  * mondification.
 273                  */
 274                 switch (lh->mlh_reg_mode) {
 275                 case LCK_EX:
 276                         lh->mlh_pdo_mode = LCK_EX;
 277                         break;
 278                 case LCK_PR:
 279                         lh->mlh_pdo_mode = LCK_CR;
 280                         break;
 281                 case LCK_PW:
 282                         lh->mlh_pdo_mode = LCK_CW;
 283                         break;
 284                 default:
 285                         CERROR("Not expected lock type (0x%x)\n",
 286                                (int)lh->mlh_reg_mode);
 287                         LBUG();
 288                 }
 289         }
 290
 291         LASSERT(lh->mlh_pdo_mode != LCK_MINMODE);
 292         EXIT;
 293 }
 294
 295 static int mdt_getstatus(struct mdt_thread_info *info)
 296 {
 297         struct mdt_device *mdt  = info->mti_mdt;
 298         struct md_device  *next = mdt->mdt_child;
 299         struct mdt_body   *repbody;
 300         int                rc;
 301
 302         ENTRY;
 303
 304         rc = mdt_check_ucred(info);
 305         if (rc)
 306                 RETURN(err_serious(rc));
 307
 308         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK))
 309                 RETURN(err_serious(-ENOMEM));
 310
 311         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 312         rc = next->md_ops->mdo_root_get(info->mti_env, next, &repbody->fid1);
 313         if (rc != 0)
 314                 RETURN(rc);
 315
 316         repbody->valid |= OBD_MD_FLID;
 317
 318         if (mdt->mdt_opts.mo_mds_capa &&
 319             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 320                 struct mdt_object  *root;
 321                 struct lustre_capa *capa;
 322
 323                 root = mdt_object_find(info->mti_env, mdt, &repbody->fid1);
 324                 if (IS_ERR(root))
 325                         RETURN(PTR_ERR(root));
 326
 327                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
 328                 LASSERT(capa);
 329                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 330                 rc = mo_capa_get(info->mti_env, mdt_object_child(root), capa,
 331                                  0);
 332                 mdt_object_put(info->mti_env, root);
 333                 if (rc == 0)
 334                         repbody->valid |= OBD_MD_FLMDSCAPA;
 335         }
 336
 337         RETURN(rc);
 338 }
 339
 340 static int mdt_statfs(struct mdt_thread_info *info)
 341 {
 342         struct md_device      *next  = info->mti_mdt->mdt_child;
 343         struct ptlrpc_service *svc;
 344         struct obd_statfs     *osfs;
 345         int                    rc;
 346
 347         ENTRY;
 348
 349         svc = info->mti_pill->rc_req->rq_rqbd->rqbd_service;
 350
 351         /* This will trigger a watchdog timeout */
 352         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
 353                          (MDT_SERVICE_WATCHDOG_FACTOR *
 354                           at_get(&svc->srv_at_estimate)) + 1);
 355
 356         rc = mdt_check_ucred(info);
 357         if (rc)
 358                 RETURN(err_serious(rc));
 359
 360         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK)) {
 361                 rc = err_serious(-ENOMEM);
 362         } else {
 363                 osfs = req_capsule_server_get(info->mti_pill, &RMF_OBD_STATFS);
 364                 rc = next->md_ops->mdo_statfs(info->mti_env, next,
 365                                               &info->mti_u.ksfs);
 366                 statfs_pack(osfs, &info->mti_u.ksfs);
 367         }
 368         RETURN(rc);
 369 }
 370
 371 void mdt_pack_size2body(struct mdt_thread_info *info, struct mdt_object *o)
 372 {
 373         struct mdt_body *b;
 374         struct lu_attr *attr = &info->mti_attr.ma_attr;
 375
 376         b = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 377
 378         /* Check if Size-on-MDS is enabled. */
 379         if ((mdt_conn_flags(info) & OBD_CONNECT_SOM) &&
 380             S_ISREG(attr->la_mode) && mdt_sizeonmds_enabled(o)) {
 381                 b->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
 382                 b->size = attr->la_size;
 383                 b->blocks = attr->la_blocks;
 384         }
 385 }
 386
 387 void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
 388                         const struct lu_attr *attr, const struct lu_fid *fid)
 389 {
 390         /*XXX should pack the reply body according to lu_valid*/
 391         b->valid |= OBD_MD_FLCTIME | OBD_MD_FLUID   |
 392                     OBD_MD_FLGID   | OBD_MD_FLTYPE  |
 393                     OBD_MD_FLMODE  | OBD_MD_FLNLINK | OBD_MD_FLFLAGS |
 394                     OBD_MD_FLATIME | OBD_MD_FLMTIME ;
 395
 396         if (!S_ISREG(attr->la_mode))
 397                 b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLRDEV;
 398
 399         b->atime      = attr->la_atime;
 400         b->mtime      = attr->la_mtime;
 401         b->ctime      = attr->la_ctime;
 402         b->mode       = attr->la_mode;
 403         b->size       = attr->la_size;
 404         b->blocks     = attr->la_blocks;
 405         b->uid        = attr->la_uid;
 406         b->gid        = attr->la_gid;
 407         b->flags      = attr->la_flags;
 408         b->nlink      = attr->la_nlink;
 409         b->rdev       = attr->la_rdev;
 410
 411         if (fid) {
 412                 b->fid1 = *fid;
 413                 b->valid |= OBD_MD_FLID;
 414
 415                 /* FIXME: these should be fixed when new igif ready.*/
 416                 b->ino  =  fid_oid(fid);       /* 1.6 compatibility */
 417                 b->generation = fid_ver(fid);  /* 1.6 compatibility */
 418                 b->valid |= OBD_MD_FLGENER;    /* 1.6 compatibility */
 419
 420                 CDEBUG(D_INODE, DFID": nlink=%d, mode=%o, size="LPU64"\n",
 421                                 PFID(fid), b->nlink, b->mode, b->size);
 422         }
 423
 424         if (info)
 425                 mdt_body_reverse_idmap(info, b);
 426 }
 427
 428 static inline int mdt_body_has_lov(const struct lu_attr *la,
 429                                    const struct mdt_body *body)
 430 {
 431         return ((S_ISREG(la->la_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
 432                 (S_ISDIR(la->la_mode) && (body->valid & OBD_MD_FLDIREA )) );
 433 }
 434
 435 static int mdt_getattr_internal(struct mdt_thread_info *info,
 436                                 struct mdt_object *o)
 437 {
 438         struct md_object        *next = mdt_object_child(o);
 439         const struct mdt_body   *reqbody = info->mti_body;
 440         struct ptlrpc_request   *req = mdt_info_req(info);
 441         struct md_attr          *ma = &info->mti_attr;
 442         struct lu_attr          *la = &ma->ma_attr;
 443         struct req_capsule      *pill = info->mti_pill;
 444         const struct lu_env     *env = info->mti_env;
 445         struct mdt_body         *repbody;
 446         struct lu_buf           *buffer = &info->mti_buf;
 447         int                     rc;
 448         ENTRY;
 449
 450         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK))
 451                 RETURN(err_serious(-ENOMEM));
 452
 453         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 454
 455         ma->ma_valid = 0;
 456
 457         rc = mdt_object_exists(o);
 458         if (rc < 0) {
 459                 /* This object is located on remote node.*/
 460                 repbody->fid1 = *mdt_object_fid(o);
 461                 repbody->valid = OBD_MD_FLID | OBD_MD_MDS;
 462                 RETURN(0);
 463         }
 464
 465         buffer->lb_buf = req_capsule_server_get(pill, &RMF_MDT_MD);
 466         buffer->lb_len = req_capsule_get_size(pill, &RMF_MDT_MD, RCL_SERVER);
 467
 468         /* If it is dir object and client require MEA, then we got MEA */
 469         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 470             reqbody->valid & OBD_MD_MEA) {
 471                 /* Assumption: MDT_MD size is enough for lmv size. */
 472                 ma->ma_lmv = buffer->lb_buf;
 473                 ma->ma_lmv_size = buffer->lb_len;
 474                 ma->ma_need = MA_LMV | MA_INODE;
 475         } else {
 476                 ma->ma_lmm = buffer->lb_buf;
 477                 ma->ma_lmm_size = buffer->lb_len;
 478                 ma->ma_need = MA_LOV | MA_INODE;
 479         }
 480
 481         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
 482             reqbody->valid & OBD_MD_FLDIREA  &&
 483             lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR) {
 484                 /* get default stripe info for this dir. */
 485                 ma->ma_need |= MA_LOV_DEF;
 486         }
 487         rc = mo_attr_get(env, next, ma);
 488         if (unlikely(rc)) {
 489                 CERROR("getattr error for "DFID": %d\n",
 490                         PFID(mdt_object_fid(o)), rc);
 491                 RETURN(rc);
 492         }
 493
 494         if (likely(ma->ma_valid & MA_INODE))
 495                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
 496         else
 497                 RETURN(-EFAULT);
 498
 499         if (mdt_body_has_lov(la, reqbody)) {
 500                 if (ma->ma_valid & MA_LOV) {
 501                         LASSERT(ma->ma_lmm_size);
 502                         mdt_dump_lmm(D_INFO, ma->ma_lmm);
 503                         repbody->eadatasize = ma->ma_lmm_size;
 504                         if (S_ISDIR(la->la_mode))
 505                                 repbody->valid |= OBD_MD_FLDIREA;
 506                         else
 507                                 repbody->valid |= OBD_MD_FLEASIZE;
 508                 }
 509                 if (ma->ma_valid & MA_LMV) {
 510                         LASSERT(S_ISDIR(la->la_mode));
 511                         repbody->eadatasize = ma->ma_lmv_size;
 512                         repbody->valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
 513                 }
 514                 if (!(ma->ma_valid & MA_LOV) && !(ma->ma_valid & MA_LMV)) {
 515                         repbody->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
 516                 }
 517         } else if (S_ISLNK(la->la_mode) &&
 518                    reqbody->valid & OBD_MD_LINKNAME) {
 519                 buffer->lb_buf = ma->ma_lmm;
 520                 buffer->lb_len = reqbody->eadatasize;
 521                 rc = mo_readlink(env, next, buffer);
 522                 if (unlikely(rc <= 0)) {
 523                         CERROR("readlink failed: %d\n", rc);
 524                         rc = -EFAULT;
 525                 } else {
 526                         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
 527                                  rc -= 2;
 528                         repbody->valid |= OBD_MD_LINKNAME;
 529                         repbody->eadatasize = rc;
 530                         /* NULL terminate */
 531                         ((char*)ma->ma_lmm)[rc - 1] = 0;
 532                         CDEBUG(D_INODE, "symlink dest %s, len = %d\n",
 533                                (char*)ma->ma_lmm, rc);
 534                         rc = 0;
 535                 }
 536         }
 537
 538         if (reqbody->valid & OBD_MD_FLMODEASIZE) {
 539                 repbody->max_cookiesize = info->mti_mdt->mdt_max_cookiesize;
 540                 repbody->max_mdsize = info->mti_mdt->mdt_max_mdsize;
 541                 repbody->valid |= OBD_MD_FLMODEASIZE;
 542                 CDEBUG(D_INODE, "I am going to change the MAX_MD_SIZE & "
 543                        "MAX_COOKIE to : %d:%d\n", repbody->max_mdsize,
 544                        repbody->max_cookiesize);
 545         }
 546
 547         if (exp_connect_rmtclient(info->mti_exp) &&
 548             reqbody->valid & OBD_MD_FLRMTPERM) {
 549                 void *buf = req_capsule_server_get(pill, &RMF_ACL);
 550
 551                 /* mdt_getattr_lock only */
 552                 rc = mdt_pack_remote_perm(info, o, buf);
 553                 if (rc) {
 554                         repbody->valid &= ~OBD_MD_FLRMTPERM;
 555                         repbody->aclsize = 0;
 556                         RETURN(rc);
 557                 } else {
 558                         repbody->valid |= OBD_MD_FLRMTPERM;
 559                         repbody->aclsize = sizeof(struct mdt_remote_perm);
 560                 }
 561         }
 562 #ifdef CONFIG_FS_POSIX_ACL
 563         else if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
 564                  (reqbody->valid & OBD_MD_FLACL)) {
 565                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_ACL);
 566                 buffer->lb_len = req_capsule_get_size(pill,
 567                                                       &RMF_ACL, RCL_SERVER);
 568                 if (buffer->lb_len > 0) {
 569                         rc = mo_xattr_get(env, next, buffer,
 570                                           XATTR_NAME_ACL_ACCESS);
 571                         if (rc < 0) {
 572                                 if (rc == -ENODATA) {
 573                                         repbody->aclsize = 0;
 574                                         repbody->valid |= OBD_MD_FLACL;
 575                                         rc = 0;
 576                                 } else if (rc == -EOPNOTSUPP) {
 577                                         rc = 0;
 578                                 } else {
 579                                         CERROR("got acl size: %d\n", rc);
 580                                 }
 581                         } else {
 582                                 repbody->aclsize = rc;
 583                                 repbody->valid |= OBD_MD_FLACL;
 584                                 rc = 0;
 585                         }
 586                 }
 587         }
 588 #endif
 589
 590         if (reqbody->valid & OBD_MD_FLMDSCAPA &&
 591             info->mti_mdt->mdt_opts.mo_mds_capa &&
 592             info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
 593                 struct lustre_capa *capa;
 594
 595                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 596                 LASSERT(capa);
 597                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
 598                 rc = mo_capa_get(env, next, capa, 0);
 599                 if (rc)
 600                         RETURN(rc);
 601                 repbody->valid |= OBD_MD_FLMDSCAPA;
 602         }
 603         RETURN(rc);
 604 }
 605
 606 static int mdt_renew_capa(struct mdt_thread_info *info)
 607 {
 608         struct mdt_object  *obj = info->mti_object;
 609         struct mdt_body    *body;
 610         struct lustre_capa *capa, *c;
 611         int rc;
 612         ENTRY;
 613
 614         /* if object doesn't exist, or server has disabled capability,
 615          * return directly, client will find body->valid OBD_MD_FLOSSCAPA
 616          * flag not set.
 617          */
 618         if (!obj || !info->mti_mdt->mdt_opts.mo_oss_capa ||
 619             !(info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA))
 620                 RETURN(0);
 621
 622         body = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 623         LASSERT(body != NULL);
 624
 625         c = req_capsule_client_get(info->mti_pill, &RMF_CAPA1);
 626         LASSERT(c);
 627
 628         capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
 629         LASSERT(capa);
 630
 631         *capa = *c;
 632         rc = mo_capa_get(info->mti_env, mdt_object_child(obj), capa, 1);
 633         if (rc == 0)
 634                 body->valid |= OBD_MD_FLOSSCAPA;
 635         RETURN(rc);
 636 }
 637
 638 static int mdt_getattr(struct mdt_thread_info *info)
 639 {
 640         struct mdt_object       *obj = info->mti_object;
 641         struct req_capsule      *pill = info->mti_pill;
 642         struct mdt_body         *reqbody;
 643         struct mdt_body         *repbody;
 644         mode_t                   mode;
 645         int                      md_size;
 646         int rc;
 647         ENTRY;
 648
 649         reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
 650         LASSERT(reqbody);
 651
 652         if (reqbody->valid & OBD_MD_FLOSSCAPA) {
 653                 rc = req_capsule_server_pack(pill);
 654                 if (unlikely(rc))
 655                         RETURN(err_serious(rc));
 656                 rc = mdt_renew_capa(info);
 657                 GOTO(out_shrink, rc);
 658         }
 659
 660         LASSERT(obj != NULL);
 661         LASSERT(lu_object_assert_exists(&obj->mot_obj.mo_lu));
 662
 663         mode = lu_object_attr(&obj->mot_obj.mo_lu);
 664         if (S_ISLNK(mode) && (reqbody->valid & OBD_MD_LINKNAME) &&
 665             (reqbody->eadatasize > info->mti_mdt->mdt_max_mdsize))
 666                 md_size = reqbody->eadatasize;
 667         else
 668                 md_size = info->mti_mdt->mdt_max_mdsize;
 669
 670         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, md_size);
 671
 672         rc = req_capsule_server_pack(pill);
 673         if (unlikely(rc != 0))
 674                 RETURN(err_serious(rc));
 675
 676         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 677         LASSERT(repbody != NULL);
 678         repbody->eadatasize = 0;
 679         repbody->aclsize = 0;
 680
 681         if (reqbody->valid & OBD_MD_FLRMTPERM)
 682                 rc = mdt_init_ucred(info, reqbody);
 683         else
 684                 rc = mdt_check_ucred(info);
 685         if (unlikely(rc))
 686                 GOTO(out_shrink, rc);
 687
 688         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
 689         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
 690
 691         /*
 692          * Don't check capability at all, because rename might getattr for
 693          * remote obj, and at that time no capability is available.
 694          */
 695         mdt_set_capainfo(info, 1, &reqbody->fid1, BYPASS_CAPA);
 696         rc = mdt_getattr_internal(info, obj);
 697         if (reqbody->valid & OBD_MD_FLRMTPERM)
 698                 mdt_exit_ucred(info);
 699         EXIT;
 700 out_shrink:
 701         mdt_shrink_reply(info);
 702         return rc;
 703 }
 704
 705 static int mdt_is_subdir(struct mdt_thread_info *info)
 706 {
 707         struct mdt_object     *o = info->mti_object;
 708         struct req_capsule    *pill = info->mti_pill;
 709         const struct mdt_body *body = info->mti_body;
 710         struct mdt_body       *repbody;
 711         int                    rc;
 712         ENTRY;
 713
 714         LASSERT(o != NULL);
 715
 716         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 717
 718         /*
 719          * We save last checked parent fid to @repbody->fid1 for remote
 720          * directory case.
 721          */
 722         LASSERT(fid_is_sane(&body->fid2));
 723         LASSERT(mdt_object_exists(o) > 0);
 724         rc = mdo_is_subdir(info->mti_env, mdt_object_child(o),
 725                            &body->fid2, &repbody->fid1);
 726         if (rc == 0 || rc == -EREMOTE)
 727                 repbody->valid |= OBD_MD_FLID;
 728
 729         RETURN(rc);
 730 }
 731
 732 static int mdt_raw_lookup(struct mdt_thread_info *info,
 733                           struct mdt_object *parent,
 734                           const struct lu_name *lname,
 735                           struct ldlm_reply *ldlm_rep)
 736 {
 737         struct md_object *next = mdt_object_child(info->mti_object);
 738         const struct mdt_body *reqbody = info->mti_body;
 739         struct lu_fid *child_fid = &info->mti_tmp_fid1;
 740         struct mdt_body *repbody;
 741         int rc;
 742         ENTRY;
 743
 744         if (reqbody->valid != OBD_MD_FLID)
 745                 RETURN(0);
 746
 747         LASSERT(!info->mti_cross_ref);
 748
 749         /* Only got the fid of this obj by name */
 750         rc = mdo_lookup(info->mti_env, next, lname, child_fid,
 751                         &info->mti_spec);
 752 #if 0
 753         /* XXX is raw_lookup possible as intent operation? */
 754         if (rc != 0) {
 755                 if (rc == -ENOENT)
 756                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
 757                 RETURN(rc);
 758         } else
 759                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
 760
 761         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 762 #endif
 763         if (rc == 0) {
 764                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 765                 repbody->fid1 = *child_fid;
 766                 repbody->valid = OBD_MD_FLID;
 767         }
 768         RETURN(1);
 769 }
 770
 771 /*
 772  * UPDATE lock should be taken against parent, and be release before exit;
 773  * child_bits lock should be taken against child, and be returned back:
 774  *            (1)normal request should release the child lock;
 775  *            (2)intent request will grant the lock to client.
 776  */
 777 static int mdt_getattr_name_lock(struct mdt_thread_info *info,
 778                                  struct mdt_lock_handle *lhc,
 779                                  __u64 child_bits,
 780                                  struct ldlm_reply *ldlm_rep)
 781 {
 782         struct ptlrpc_request  *req       = mdt_info_req(info);
 783         struct mdt_body        *reqbody   = NULL;
 784         struct mdt_object      *parent    = info->mti_object;
 785         struct mdt_object      *child;
 786         struct md_object       *next      = mdt_object_child(parent);
 787         struct lu_fid          *child_fid = &info->mti_tmp_fid1;
 788         struct lu_name         *lname     = NULL;
 789         const char             *name      = NULL;
 790         int                     namelen   = 0;
 791         struct mdt_lock_handle *lhp;
 792         struct ldlm_lock       *lock;
 793         struct ldlm_res_id     *res_id;
 794         int                     is_resent;
 795         int                     rc;
 796
 797         ENTRY;
 798
 799         is_resent = lustre_handle_is_used(&lhc->mlh_reg_lh);
 800         LASSERT(ergo(is_resent,
 801                      lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT));
 802
 803         LASSERT(parent != NULL);
 804         name = req_capsule_client_get(info->mti_pill, &RMF_NAME);
 805         if (name == NULL)
 806                 RETURN(err_serious(-EFAULT));
 807
 808         namelen = req_capsule_get_size(info->mti_pill, &RMF_NAME,
 809                                        RCL_CLIENT) - 1;
 810         if (!info->mti_cross_ref) {
 811                 /*
 812                  * XXX: Check for "namelen == 0" is for getattr by fid
 813                  * (OBD_CONNECT_ATTRFID), otherwise do not allow empty name,
 814                  * that is the name must contain at least one character and
 815                  * the terminating '\0'
 816                  */
 817                 if (namelen == 0) {
 818                         reqbody = req_capsule_client_get(info->mti_pill,
 819                                                          &RMF_MDT_BODY);
 820                         LASSERT(fid_is_sane(&reqbody->fid2));
 821                         name = NULL;
 822
 823                         CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", "
 824                                "ldlm_rep = %p\n",
 825                                PFID(mdt_object_fid(parent)), PFID(&reqbody->fid2),
 826                                ldlm_rep);
 827                 } else {
 828                         lname = mdt_name(info->mti_env, (char *)name, namelen);
 829                         CDEBUG(D_INODE, "getattr with lock for "DFID"/%s, "
 830                                "ldlm_rep = %p\n", PFID(mdt_object_fid(parent)),
 831                                name, ldlm_rep);
 832                 }
 833         }
 834         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_EXECD);
 835
 836         rc = mdt_object_exists(parent);
 837         if (unlikely(rc == 0)) {
 838                 LU_OBJECT_DEBUG(D_WARNING, info->mti_env,
 839                                 &parent->mot_obj.mo_lu,
 840                                 "Parent doesn't exist!\n");
 841                 RETURN(-ESTALE);
 842         } else if (!info->mti_cross_ref) {
 843                 LASSERTF(rc > 0, "Parent "DFID" is on remote server\n",
 844                          PFID(mdt_object_fid(parent)));
 845         }
 846         if (lname) {
 847                 rc = mdt_raw_lookup(info, parent, lname, ldlm_rep);
 848                 if (rc != 0) {
 849                         if (rc > 0)
 850                                 rc = 0;
 851                         RETURN(rc);
 852                 }
 853         }
 854
 855         if (info->mti_cross_ref) {
 856                 /* Only getattr on the child. Parent is on another node. */
 857                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
 858                 child = parent;
 859                 CDEBUG(D_INODE, "partial getattr_name child_fid = "DFID", "
 860                        "ldlm_rep=%p\n", PFID(mdt_object_fid(child)), ldlm_rep);
 861
 862                 if (is_resent) {
 863                         /* Do not take lock for resent case. */
 864                         lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
 865                         LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
 866                                  lhc->mlh_reg_lh.cookie);
 867                         LASSERT(fid_res_name_eq(mdt_object_fid(child),
 868                                                 &lock->l_resource->lr_name));
 869                         LDLM_LOCK_PUT(lock);
 870                         rc = 0;
 871                 } else {
 872                         mdt_lock_handle_init(lhc);
 873                         mdt_lock_reg_init(lhc, LCK_PR);
 874
 875                         /*
 876                          * Object's name is on another MDS, no lookup lock is
 877                          * needed here but update is.
 878                          */
 879                         child_bits &= ~MDS_INODELOCK_LOOKUP;
 880                         child_bits |= MDS_INODELOCK_UPDATE;
 881
 882                         rc = mdt_object_lock(info, child, lhc, child_bits,
 883                                              MDT_LOCAL_LOCK);
 884                 }
 885                 if (rc == 0) {
 886                         /* Finally, we can get attr for child. */
 887                         mdt_set_capainfo(info, 0, mdt_object_fid(child),
 888                                          BYPASS_CAPA);
 889                         rc = mdt_getattr_internal(info, child);
 890                         if (unlikely(rc != 0))
 891                                 mdt_object_unlock(info, child, lhc, 1);
 892                 }
 893                 RETURN(rc);
 894         }
 895
 896         /* step 1: lock parent */
 897         lhp = &info->mti_lh[MDT_LH_PARENT];
 898         mdt_lock_pdo_init(lhp, LCK_PR, name, namelen);
 899         rc = mdt_object_lock(info, parent, lhp, MDS_INODELOCK_UPDATE,
 900                              MDT_LOCAL_LOCK);
 901
 902         if (unlikely(rc != 0))
 903                 RETURN(rc);
 904
 905         if (lname) {
 906                 /* step 2: lookup child's fid by name */
 907                 rc = mdo_lookup(info->mti_env, next, lname, child_fid,
 908                                 &info->mti_spec);
 909
 910                 if (rc != 0) {
 911                         if (rc == -ENOENT)
 912                                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
 913                         GOTO(out_parent, rc);
 914                 } else
 915                         mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
 916         } else {
 917                 *child_fid = reqbody->fid2;
 918                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
 919         }
 920
 921         /*
 922          *step 3: find the child object by fid & lock it.
 923          *        regardless if it is local or remote.
 924          */
 925         child = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
 926
 927         if (unlikely(IS_ERR(child)))
 928                 GOTO(out_parent, rc = PTR_ERR(child));
 929         if (is_resent) {
 930                 /* Do not take lock for resent case. */
 931                 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
 932                 LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
 933                          lhc->mlh_reg_lh.cookie);
 934
 935                 res_id = &lock->l_resource->lr_name;
 936                 if (!fid_res_name_eq(mdt_object_fid(child),
 937                                     &lock->l_resource->lr_name)) {
 938                          LASSERTF(fid_res_name_eq(mdt_object_fid(parent),
 939                                                  &lock->l_resource->lr_name),
 940                                  "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
 941                                  (unsigned long)res_id->name[0],
 942                                  (unsigned long)res_id->name[1],
 943                                  (unsigned long)res_id->name[2],
 944                                  PFID(mdt_object_fid(parent)));
 945                           CWARN("Although resent, but still not get child lock"
 946                                 "parent:"DFID" child:"DFID"\n",
 947                                 PFID(mdt_object_fid(parent)),
 948                                 PFID(mdt_object_fid(child)));
 949                           lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
 950                           LDLM_LOCK_PUT(lock);
 951                           GOTO(relock, 0);
 952                 }
 953                 LDLM_LOCK_PUT(lock);
 954                 rc = 0;
 955         } else {
 956                 struct md_attr *ma;
 957 relock:
 958                 ma = &info->mti_attr;
 959
 960                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout*2);
 961                 mdt_lock_handle_init(lhc);
 962                 mdt_lock_reg_init(lhc, LCK_PR);
 963
 964                 if (mdt_object_exists(child) == 0) {
 965                         LU_OBJECT_DEBUG(D_WARNING, info->mti_env,
 966                                         &child->mot_obj.mo_lu,
 967                                         "Object doesn't exist!\n");
 968                         GOTO(out_child, rc = -ESTALE);
 969                 }
 970
 971                 ma->ma_valid = 0;
 972                 ma->ma_need = MA_INODE;
 973                 rc = mo_attr_get(info->mti_env, next, ma);
 974                 if (unlikely(rc != 0))
 975                         GOTO(out_child, rc);
 976
 977                 /* If the file has not been changed for some time, we return
 978                  * not only a LOOKUP lock, but also an UPDATE lock and this
 979                  * might save us RPC on later STAT. For directories, it also
 980                  * let negative dentry starts working for this dir. */
 981                 if (ma->ma_valid & MA_INODE &&
 982                     ma->ma_attr.la_valid & LA_CTIME &&
 983                     info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
 984                     ma->ma_attr.la_ctime < cfs_time_current_sec())
 985                         child_bits |= MDS_INODELOCK_UPDATE;
 986
 987                 rc = mdt_object_lock(info, child, lhc, child_bits,
 988                                      MDT_CROSS_LOCK);
 989
 990                 if (unlikely(rc != 0))
 991                         GOTO(out_child, rc);
 992         }
 993
 994         /* finally, we can get attr for child. */
 995         mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
 996         rc = mdt_getattr_internal(info, child);
 997         if (unlikely(rc != 0)) {
 998                 mdt_object_unlock(info, child, lhc, 1);
 999         } else {
1000                 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1001                 if (lock) {
1002                         struct mdt_body *repbody;
1003
1004                         /* Debugging code. */
1005                         res_id = &lock->l_resource->lr_name;
1006                         LDLM_DEBUG(lock, "Returning lock to client");
1007                         LASSERTF(fid_res_name_eq(mdt_object_fid(child),
1008                                                  &lock->l_resource->lr_name),
1009                                  "Lock res_id: %lu/%lu/%lu, Fid: "DFID".\n",
1010                                  (unsigned long)res_id->name[0],
1011                                  (unsigned long)res_id->name[1],
1012                                  (unsigned long)res_id->name[2],
1013                                  PFID(mdt_object_fid(child)));
1014                         /*
1015                          * Pack Size-on-MDS inode attributes to the body if
1016                          * update lock is given.
1017                          */
1018                         repbody = req_capsule_server_get(info->mti_pill,
1019                                                          &RMF_MDT_BODY);
1020                         if (lock->l_policy_data.l_inodebits.bits &
1021                             MDS_INODELOCK_UPDATE)
1022                                 mdt_pack_size2body(info, child);
1023                         LDLM_LOCK_PUT(lock);
1024                 }
1025         }
1026         EXIT;
1027 out_child:
1028         mdt_object_put(info->mti_env, child);
1029 out_parent:
1030         mdt_object_unlock(info, parent, lhp, 1);
1031         return rc;
1032 }
1033
1034 /* normal handler: should release the child lock */
1035 static int mdt_getattr_name(struct mdt_thread_info *info)
1036 {
1037         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_CHILD];
1038         struct mdt_body        *reqbody;
1039         struct mdt_body        *repbody;
1040         int rc;
1041         ENTRY;
1042
1043         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1044         LASSERT(reqbody != NULL);
1045         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1046         LASSERT(repbody != NULL);
1047
1048         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
1049         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
1050         repbody->eadatasize = 0;
1051         repbody->aclsize = 0;
1052
1053         rc = mdt_init_ucred(info, reqbody);
1054         if (unlikely(rc))
1055                 GOTO(out_shrink, rc);
1056
1057         rc = mdt_getattr_name_lock(info, lhc, MDS_INODELOCK_UPDATE, NULL);
1058         if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
1059                 ldlm_lock_decref(&lhc->mlh_reg_lh, lhc->mlh_reg_mode);
1060                 lhc->mlh_reg_lh.cookie = 0;
1061         }
1062         mdt_exit_ucred(info);
1063         EXIT;
1064 out_shrink:
1065         mdt_shrink_reply(info);
1066         return rc;
1067 }
1068
1069 static const struct lu_device_operations mdt_lu_ops;
1070
1071 static int lu_device_is_mdt(struct lu_device *d)
1072 {
1073         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &mdt_lu_ops);
1074 }
1075
1076 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1077                          void *karg, void *uarg);
1078
1079 static int mdt_set_info(struct mdt_thread_info *info)
1080 {
1081         struct ptlrpc_request *req = mdt_info_req(info);
1082         char *key;
1083         void *val;
1084         int keylen, vallen, rc = 0;
1085         ENTRY;
1086
1087         rc = req_capsule_server_pack(info->mti_pill);
1088         if (rc)
1089                 RETURN(rc);
1090
1091         key = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_KEY);
1092         if (key == NULL) {
1093                 DEBUG_REQ(D_HA, req, "no set_info key");
1094                 RETURN(-EFAULT);
1095         }
1096
1097         keylen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_KEY,
1098                                       RCL_CLIENT);
1099
1100         val = req_capsule_client_get(info->mti_pill, &RMF_SETINFO_VAL);
1101         if (val == NULL) {
1102                 DEBUG_REQ(D_HA, req, "no set_info val");
1103                 RETURN(-EFAULT);
1104         }
1105
1106         vallen = req_capsule_get_size(info->mti_pill, &RMF_SETINFO_VAL,
1107                                       RCL_CLIENT);
1108
1109         /* Swab any part of val you need to here */
1110         if (KEY_IS(KEY_READ_ONLY)) {
1111                 req->rq_status = 0;
1112                 lustre_msg_set_status(req->rq_repmsg, 0);
1113
1114                 spin_lock(&req->rq_export->exp_lock);
1115                 if (*(__u32 *)val)
1116                         req->rq_export->exp_connect_flags |= OBD_CONNECT_RDONLY;
1117                 else
1118                         req->rq_export->exp_connect_flags &=~OBD_CONNECT_RDONLY;
1119                 spin_unlock(&req->rq_export->exp_lock);
1120
1121         } else if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
1122                 struct changelog_setinfo *cs =
1123                         (struct changelog_setinfo *)val;
1124                 if (vallen != sizeof(*cs)) {
1125                         CERROR("Bad changelog_clear setinfo size %d\n", vallen);
1126                         RETURN(-EINVAL);
1127                 }
1128                 if (ptlrpc_req_need_swab(req)) {
1129                         __swab64s(&cs->cs_recno);
1130                         __swab32s(&cs->cs_id);
1131                 }
1132
1133                 rc = mdt_iocontrol(OBD_IOC_CHANGELOG_CLEAR, info->mti_exp,
1134                                    vallen, val, NULL);
1135                 lustre_msg_set_status(req->rq_repmsg, rc);
1136
1137         } else {
1138                 RETURN(-EINVAL);
1139         }
1140         RETURN(0);
1141 }
1142
1143 static int mdt_connect(struct mdt_thread_info *info)
1144 {
1145         int rc;
1146         struct ptlrpc_request *req;
1147
1148         req = mdt_info_req(info);
1149         rc = target_handle_connect(req);
1150         if (rc == 0) {
1151                 LASSERT(req->rq_export != NULL);
1152                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
1153                 rc = mdt_init_sec_level(info);
1154                 if (rc == 0)
1155                         rc = mdt_init_idmap(info);
1156                 if (rc != 0)
1157                         obd_disconnect(class_export_get(req->rq_export));
1158         } else {
1159                 rc = err_serious(rc);
1160         }
1161         return rc;
1162 }
1163
1164 static int mdt_disconnect(struct mdt_thread_info *info)
1165 {
1166         int rc;
1167         ENTRY;
1168
1169         rc = target_handle_disconnect(mdt_info_req(info));
1170         if (rc)
1171                 rc = err_serious(rc);
1172         RETURN(rc);
1173 }
1174
1175 static int mdt_sendpage(struct mdt_thread_info *info,
1176                         struct lu_rdpg *rdpg)
1177 {
1178         struct ptlrpc_request   *req = mdt_info_req(info);
1179         struct obd_export       *exp = req->rq_export;
1180         struct ptlrpc_bulk_desc *desc;
1181         struct l_wait_info      *lwi = &info->mti_u.rdpg.mti_wait_info;
1182         int                      tmpcount;
1183         int                      tmpsize;
1184         int                      timeout;
1185         int                      i;
1186         int                      rc;
1187         ENTRY;
1188
1189         desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, BULK_PUT_SOURCE,
1190                                     MDS_BULK_PORTAL);
1191         if (desc == NULL)
1192                 RETURN(-ENOMEM);
1193
1194         for (i = 0, tmpcount = rdpg->rp_count;
1195                 i < rdpg->rp_npages; i++, tmpcount -= tmpsize) {
1196                 tmpsize = min_t(int, tmpcount, CFS_PAGE_SIZE);
1197                 ptlrpc_prep_bulk_page(desc, rdpg->rp_pages[i], 0, tmpsize);
1198         }
1199
1200         LASSERT(desc->bd_nob == rdpg->rp_count);
1201         rc = sptlrpc_svc_wrap_bulk(req, desc);
1202         if (rc)
1203                 GOTO(free_desc, rc);
1204
1205         rc = ptlrpc_start_bulk_transfer(desc);
1206         if (rc)
1207                 GOTO(free_desc, rc);
1208
1209         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
1210                 GOTO(abort_bulk, rc = 0);
1211
1212         timeout = (int) req->rq_deadline - cfs_time_current_sec();
1213         if (timeout < 0)
1214                 CERROR("Req deadline already passed %lu (now: %lu)\n",
1215                        req->rq_deadline, cfs_time_current_sec());
1216         *lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(max(timeout, 1)),
1217                                     cfs_time_seconds(1), NULL, NULL);
1218         rc = l_wait_event(desc->bd_waitq, !ptlrpc_server_bulk_active(desc) ||
1219                           exp->exp_failed || exp->exp_abort_active_req, lwi);
1220         LASSERT (rc == 0 || rc == -ETIMEDOUT);
1221
1222         if (rc == 0) {
1223                 if (desc->bd_success &&
1224                     desc->bd_nob_transferred == rdpg->rp_count)
1225                         GOTO(free_desc, rc);
1226
1227                 rc = -ETIMEDOUT;
1228                 if (exp->exp_abort_active_req || exp->exp_failed)
1229                         GOTO(abort_bulk, rc);
1230         }
1231
1232         DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s",
1233                   (rc == -ETIMEDOUT) ? "timeout" : "network error",
1234                   desc->bd_nob_transferred, rdpg->rp_count,
1235                   exp->exp_client_uuid.uuid,
1236                   exp->exp_connection->c_remote_uuid.uuid);
1237
1238         class_fail_export(exp);
1239
1240         EXIT;
1241 abort_bulk:
1242         ptlrpc_abort_bulk(desc);
1243 free_desc:
1244         ptlrpc_free_bulk(desc);
1245         return rc;
1246 }
1247
1248 #ifdef HAVE_SPLIT_SUPPORT
1249 /*
1250  * Retrieve dir entry from the page and insert it to the slave object, actually,
1251  * this should be in osd layer, but since it will not in the final product, so
1252  * just do it here and do not define more moo api anymore for this.
1253  */
1254 static int mdt_write_dir_page(struct mdt_thread_info *info, struct page *page,
1255                               int size)
1256 {
1257         struct mdt_object *object = info->mti_object;
1258         struct lu_fid *lf = &info->mti_tmp_fid2;
1259         struct md_attr *ma = &info->mti_attr;
1260         struct lu_dirpage *dp;
1261         struct lu_dirent *ent;
1262         int rc = 0, offset = 0;
1263         ENTRY;
1264
1265         /* Make sure we have at least one entry. */
1266         if (size == 0)
1267                 RETURN(-EINVAL);
1268
1269         /*
1270          * Disable trans for this name insert, since it will include many trans
1271          * for this.
1272          */
1273         info->mti_no_need_trans = 1;
1274         /*
1275          * When write_dir_page, no need update parent's ctime,
1276          * and no permission check for name_insert.
1277          */
1278         ma->ma_attr.la_ctime = 0;
1279         ma->ma_attr.la_valid = LA_MODE;
1280         ma->ma_valid = MA_INODE;
1281
1282         cfs_kmap(page);
1283         dp = page_address(page);
1284         offset = (int)((__u32)lu_dirent_start(dp) - (__u32)dp);
1285
1286         for (ent = lu_dirent_start(dp); ent != NULL;
1287              ent = lu_dirent_next(ent)) {
1288                 struct lu_name *lname;
1289                 char *name;
1290
1291                 if (le16_to_cpu(ent->lde_namelen) == 0)
1292                         continue;
1293
1294                 fid_le_to_cpu(lf, &ent->lde_fid);
1295                 if (le64_to_cpu(ent->lde_hash) & MAX_HASH_HIGHEST_BIT)
1296                         ma->ma_attr.la_mode = S_IFDIR;
1297                 else
1298                         ma->ma_attr.la_mode = 0;
1299                 OBD_ALLOC(name, le16_to_cpu(ent->lde_namelen) + 1);
1300                 if (name == NULL)
1301                         GOTO(out, rc = -ENOMEM);
1302
1303                 memcpy(name, ent->lde_name, le16_to_cpu(ent->lde_namelen));
1304                 lname = mdt_name(info->mti_env, name,
1305                                  le16_to_cpu(ent->lde_namelen));
1306                 ma->ma_attr_flags |= (MDS_PERM_BYPASS | MDS_QUOTA_IGNORE);
1307                 rc = mdo_name_insert(info->mti_env,
1308                                      md_object_next(&object->mot_obj),
1309                                      lname, lf, ma);
1310                 OBD_FREE(name, le16_to_cpu(ent->lde_namelen) + 1);
1311                 if (rc) {
1312                         CERROR("Can't insert %*.*s, rc %d\n",
1313                                le16_to_cpu(ent->lde_namelen),
1314                                le16_to_cpu(ent->lde_namelen),
1315                                ent->lde_name, rc);
1316                         GOTO(out, rc);
1317                 }
1318
1319                 offset += lu_dirent_size(ent);
1320                 if (offset >= size)
1321                         break;
1322         }
1323         EXIT;
1324 out:
1325         cfs_kunmap(page);
1326         return rc;
1327 }
1328
1329 static int mdt_bulk_timeout(void *data)
1330 {
1331         ENTRY;
1332
1333         CERROR("mdt bulk transfer timeout \n");
1334
1335         RETURN(1);
1336 }
1337
1338 static int mdt_writepage(struct mdt_thread_info *info)
1339 {
1340         struct ptlrpc_request   *req = mdt_info_req(info);
1341         struct mdt_body         *reqbody;
1342         struct l_wait_info      *lwi;
1343         struct ptlrpc_bulk_desc *desc;
1344         struct page             *page;
1345         int                rc;
1346         ENTRY;
1347
1348
1349         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1350         if (reqbody == NULL)
1351                 RETURN(err_serious(-EFAULT));
1352
1353         desc = ptlrpc_prep_bulk_exp(req, 1, BULK_GET_SINK, MDS_BULK_PORTAL);
1354         if (desc == NULL)
1355                 RETURN(err_serious(-ENOMEM));
1356
1357         /* allocate the page for the desc */
1358         page = cfs_alloc_page(CFS_ALLOC_STD);
1359         if (page == NULL)
1360                 GOTO(desc_cleanup, rc = -ENOMEM);
1361
1362         CDEBUG(D_INFO, "Received page offset %d size %d \n",
1363                (int)reqbody->size, (int)reqbody->nlink);
1364
1365         ptlrpc_prep_bulk_page(desc, page, (int)reqbody->size,
1366                               (int)reqbody->nlink);
1367
1368         rc = sptlrpc_svc_prep_bulk(req, desc);
1369         if (rc != 0)
1370                 GOTO(cleanup_page, rc);
1371         /*
1372          * Check if client was evicted while we were doing i/o before touching
1373          * network.
1374          */
1375         OBD_ALLOC_PTR(lwi);
1376         if (!lwi)
1377                 GOTO(cleanup_page, rc = -ENOMEM);
1378
1379         if (desc->bd_export->exp_failed)
1380                 rc = -ENOTCONN;
1381         else
1382                 rc = ptlrpc_start_bulk_transfer (desc);
1383         if (rc == 0) {
1384                 *lwi = LWI_TIMEOUT_INTERVAL(obd_timeout * HZ / 4, HZ,
1385                                             mdt_bulk_timeout, desc);
1386                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc) ||
1387                                   desc->bd_export->exp_failed, lwi);
1388                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
1389                 if (rc == -ETIMEDOUT) {
1390                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
1391                         ptlrpc_abort_bulk(desc);
1392                 } else if (desc->bd_export->exp_failed) {
1393                         DEBUG_REQ(D_ERROR, req, "Eviction on bulk GET");
1394                         rc = -ENOTCONN;
1395                         ptlrpc_abort_bulk(desc);
1396                 } else if (!desc->bd_success ||
1397                            desc->bd_nob_transferred != desc->bd_nob) {
1398                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
1399                                   desc->bd_success ?
1400                                   "truncated" : "network error on",
1401                                   desc->bd_nob_transferred, desc->bd_nob);
1402                         /* XXX should this be a different errno? */
1403                         rc = -ETIMEDOUT;
1404                 }
1405         } else {
1406                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d", rc);
1407         }
1408         if (rc)
1409                 GOTO(cleanup_lwi, rc);
1410         rc = mdt_write_dir_page(info, page, reqbody->nlink);
1411
1412 cleanup_lwi:
1413         OBD_FREE_PTR(lwi);
1414 cleanup_page:
1415         cfs_free_page(page);
1416 desc_cleanup:
1417         ptlrpc_free_bulk(desc);
1418         RETURN(rc);
1419 }
1420 #endif
1421
1422 static int mdt_readpage(struct mdt_thread_info *info)
1423 {
1424         struct mdt_object *object = info->mti_object;
1425         struct lu_rdpg    *rdpg = &info->mti_u.rdpg.mti_rdpg;
1426         struct mdt_body   *reqbody;
1427         struct mdt_body   *repbody;
1428         int                rc;
1429         int                i;
1430         ENTRY;
1431
1432         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
1433                 RETURN(err_serious(-ENOMEM));
1434
1435         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
1436         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1437         if (reqbody == NULL || repbody == NULL)
1438                 RETURN(err_serious(-EFAULT));
1439
1440         /*
1441          * prepare @rdpg before calling lower layers and transfer itself. Here
1442          * reqbody->size contains offset of where to start to read and
1443          * reqbody->nlink contains number bytes to read.
1444          */
1445         rdpg->rp_hash = reqbody->size;
1446         if (rdpg->rp_hash != reqbody->size) {
1447                 CERROR("Invalid hash: "LPX64" != "LPX64"\n",
1448                        rdpg->rp_hash, reqbody->size);
1449                 RETURN(-EFAULT);
1450         }
1451
1452         rdpg->rp_attrs = reqbody->mode;
1453         rdpg->rp_count  = reqbody->nlink;
1454         rdpg->rp_npages = (rdpg->rp_count + CFS_PAGE_SIZE - 1)>>CFS_PAGE_SHIFT;
1455         OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1456         if (rdpg->rp_pages == NULL)
1457                 RETURN(-ENOMEM);
1458
1459         for (i = 0; i < rdpg->rp_npages; ++i) {
1460                 rdpg->rp_pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
1461                 if (rdpg->rp_pages[i] == NULL)
1462                         GOTO(free_rdpg, rc = -ENOMEM);
1463         }
1464
1465         /* call lower layers to fill allocated pages with directory data */
1466         rc = mo_readpage(info->mti_env, mdt_object_child(object), rdpg);
1467         if (rc)
1468                 GOTO(free_rdpg, rc);
1469
1470         /* send pages to client */
1471         rc = mdt_sendpage(info, rdpg);
1472
1473         EXIT;
1474 free_rdpg:
1475
1476         for (i = 0; i < rdpg->rp_npages; i++)
1477                 if (rdpg->rp_pages[i] != NULL)
1478                         cfs_free_page(rdpg->rp_pages[i]);
1479         OBD_FREE(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
1480
1481         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
1482                 RETURN(0);
1483
1484         return rc;
1485 }
1486
1487 static int mdt_reint_internal(struct mdt_thread_info *info,
1488                               struct mdt_lock_handle *lhc,
1489                               __u32 op)
1490 {
1491         struct req_capsule      *pill = info->mti_pill;
1492         struct mdt_device       *mdt = info->mti_mdt;
1493         struct mdt_body         *repbody;
1494         int                      rc = 0;
1495         ENTRY;
1496
1497         /* pack reply */
1498         if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1499                 req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
1500                                      mdt->mdt_max_mdsize);
1501         if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
1502                 req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER,
1503                                      mdt->mdt_max_cookiesize);
1504
1505         rc = req_capsule_server_pack(pill);
1506         if (rc != 0) {
1507                 CERROR("Can't pack response, rc %d\n", rc);
1508                 RETURN(err_serious(rc));
1509         }
1510
1511         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_SERVER)) {
1512                 repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1513                 LASSERT(repbody);
1514                 repbody->eadatasize = 0;
1515                 repbody->aclsize = 0;
1516         }
1517
1518         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK))
1519                 GOTO(out_shrink, rc = err_serious(-EFAULT));
1520
1521         rc = mdt_reint_unpack(info, op);
1522         if (rc != 0) {
1523                 CERROR("Can't unpack reint, rc %d\n", rc);
1524                 GOTO(out_shrink, rc = err_serious(rc));
1525         }
1526
1527         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_REINT_DELAY, 10);
1528
1529         /* for replay no cookkie / lmm need, because client have this already */
1530         if (info->mti_spec.no_create == 1)  {
1531                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
1532                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, 0);
1533
1534                 if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
1535                         req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER,
1536                                              0);
1537         }
1538
1539         rc = mdt_init_ucred_reint(info);
1540         if (rc)
1541                 GOTO(out_shrink, rc);
1542
1543         rc = mdt_fix_attr_ucred(info, op);
1544         if (rc != 0)
1545                 GOTO(out_ucred, rc = err_serious(rc));
1546
1547         if (mdt_check_resent(info, mdt_reconstruct, lhc)) {
1548                 rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
1549                 GOTO(out_ucred, rc);
1550         }
1551         rc = mdt_reint_rec(info, lhc);
1552         EXIT;
1553 out_ucred:
1554         mdt_exit_ucred(info);
1555 out_shrink:
1556         mdt_shrink_reply(info);
1557         return rc;
1558 }
1559
1560 static long mdt_reint_opcode(struct mdt_thread_info *info,
1561                              const struct req_format **fmt)
1562 {
1563         struct mdt_rec_reint *rec;
1564         long opc;
1565
1566         opc = err_serious(-EFAULT);
1567         rec = req_capsule_client_get(info->mti_pill, &RMF_REC_REINT);
1568         if (rec != NULL) {
1569                 opc = rec->rr_opcode;
1570                 DEBUG_REQ(D_INODE, mdt_info_req(info), "reint opt = %ld", opc);
1571                 if (opc < REINT_MAX && fmt[opc] != NULL)
1572                         req_capsule_extend(info->mti_pill, fmt[opc]);
1573                 else {
1574                         CERROR("Unsupported opc: %ld\n", opc);
1575                         opc = err_serious(opc);
1576                 }
1577         }
1578         return opc;
1579 }
1580
1581 static int mdt_reint(struct mdt_thread_info *info)
1582 {
1583         long opc;
1584         int  rc;
1585
1586         static const struct req_format *reint_fmts[REINT_MAX] = {
1587                 [REINT_SETATTR]  = &RQF_MDS_REINT_SETATTR,
1588                 [REINT_CREATE]   = &RQF_MDS_REINT_CREATE,
1589                 [REINT_LINK]     = &RQF_MDS_REINT_LINK,
1590                 [REINT_UNLINK]   = &RQF_MDS_REINT_UNLINK,
1591                 [REINT_RENAME]   = &RQF_MDS_REINT_RENAME,
1592                 [REINT_OPEN]     = &RQF_MDS_REINT_OPEN,
1593                 [REINT_SETXATTR] = &RQF_MDS_REINT_SETXATTR
1594         };
1595
1596         ENTRY;
1597
1598         opc = mdt_reint_opcode(info, reint_fmts);
1599         if (opc >= 0) {
1600                 /*
1601                  * No lock possible here from client to pass it to reint code
1602                  * path.
1603                  */
1604                 rc = mdt_reint_internal(info, NULL, opc);
1605         } else {
1606                 rc = opc;
1607         }
1608
1609         info->mti_fail_id = OBD_FAIL_MDS_REINT_NET_REP;
1610         RETURN(rc);
1611 }
1612
1613 /* this should sync the whole device */
1614 static int mdt_device_sync(const struct lu_env *env, struct mdt_device *mdt)
1615 {
1616         struct dt_device *dt = mdt->mdt_bottom;
1617         int rc;
1618         ENTRY;
1619
1620         rc = dt->dd_ops->dt_sync(env, dt);
1621         RETURN(rc);
1622 }
1623
1624 /* this should sync this object */
1625 static int mdt_object_sync(struct mdt_thread_info *info)
1626 {
1627         struct md_object *next;
1628         int rc;
1629         ENTRY;
1630
1631         if (!mdt_object_exists(info->mti_object)) {
1632                 CWARN("Non existing object  "DFID"!\n",
1633                       PFID(mdt_object_fid(info->mti_object)));
1634                 RETURN(-ESTALE);
1635         }
1636         next = mdt_object_child(info->mti_object);
1637         rc = mo_object_sync(info->mti_env, next);
1638
1639         RETURN(rc);
1640 }
1641
1642 static int mdt_sync(struct mdt_thread_info *info)
1643 {
1644         struct req_capsule *pill = info->mti_pill;
1645         struct mdt_body *body;
1646         int rc;
1647         ENTRY;
1648
1649         /* The fid may be zero, so we req_capsule_set manually */
1650         req_capsule_set(pill, &RQF_MDS_SYNC);
1651
1652         body = req_capsule_client_get(pill, &RMF_MDT_BODY);
1653         if (body == NULL)
1654                 RETURN(err_serious(-EINVAL));
1655
1656         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1657                 RETURN(err_serious(-ENOMEM));
1658
1659         if (fid_seq(&body->fid1) == 0) {
1660                 /* sync the whole device */
1661                 rc = req_capsule_server_pack(pill);
1662                 if (rc == 0)
1663                         rc = mdt_device_sync(info->mti_env, info->mti_mdt);
1664                 else
1665                         rc = err_serious(rc);
1666         } else {
1667                 /* sync an object */
1668                 rc = mdt_unpack_req_pack_rep(info, HABEO_CORPUS|HABEO_REFERO);
1669                 if (rc == 0) {
1670                         rc = mdt_object_sync(info);
1671                         if (rc == 0) {
1672                                 struct md_object *next;
1673                                 const struct lu_fid *fid;
1674                                 struct lu_attr *la = &info->mti_attr.ma_attr;
1675
1676                                 next = mdt_object_child(info->mti_object);
1677                                 info->mti_attr.ma_need = MA_INODE;
1678                                 info->mti_attr.ma_valid = 0;
1679                                 rc = mo_attr_get(info->mti_env, next,
1680                                                  &info->mti_attr);
1681                                 if (rc == 0) {
1682                                         body = req_capsule_server_get(pill,
1683                                                                 &RMF_MDT_BODY);
1684                                         fid = mdt_object_fid(info->mti_object);
1685                                         mdt_pack_attr2body(info, body, la, fid);
1686                                 }
1687                         }
1688                 } else
1689                         rc = err_serious(rc);
1690         }
1691         RETURN(rc);
1692 }
1693
1694 #ifdef HAVE_QUOTA_SUPPORT
1695 static int mdt_quotacheck_handle(struct mdt_thread_info *info)
1696 {
1697         struct obd_quotactl *oqctl;
1698         struct req_capsule *pill = info->mti_pill;
1699         struct obd_export *exp = info->mti_exp;
1700         struct md_device *next = info->mti_mdt->mdt_child;
1701         int rc;
1702         ENTRY;
1703
1704         oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
1705         if (oqctl == NULL)
1706                 RETURN(-EPROTO);
1707
1708         /* remote client has no permission for quotacheck */
1709         if (unlikely(exp_connect_rmtclient(exp)))
1710                 RETURN(-EPERM);
1711
1712         rc = req_capsule_server_pack(pill);
1713         if (rc)
1714                 RETURN(rc);
1715
1716         rc = next->md_ops->mdo_quota.mqo_check(info->mti_env, next, exp,
1717                                                oqctl->qc_type);
1718         RETURN(rc);
1719 }
1720
1721 static int mdt_quotactl_handle(struct mdt_thread_info *info)
1722 {
1723         struct obd_quotactl *oqctl, *repoqc;
1724         struct req_capsule *pill = info->mti_pill;
1725         struct obd_export *exp = info->mti_exp;
1726         struct md_device *next = info->mti_mdt->mdt_child;
1727         const struct md_quota_operations *mqo = &next->md_ops->mdo_quota;
1728         int id, rc;
1729         ENTRY;
1730
1731         oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
1732         if (oqctl == NULL)
1733                 RETURN(-EPROTO);
1734
1735         id = oqctl->qc_id;
1736         if (exp_connect_rmtclient(exp)) {
1737                 struct ptlrpc_request *req = mdt_info_req(info);
1738                 struct mdt_export_data *med = mdt_req2med(req);
1739                 struct lustre_idmap_table *idmap = med->med_idmap;
1740
1741                 if (unlikely(oqctl->qc_cmd != Q_GETQUOTA &&
1742                              oqctl->qc_cmd != Q_GETINFO))
1743                         RETURN(-EPERM);
1744
1745
1746                 if (oqctl->qc_type == USRQUOTA)
1747                         id = lustre_idmap_lookup_uid(NULL, idmap, 0,
1748                                                      oqctl->qc_id);
1749                 else if (oqctl->qc_type == GRPQUOTA)
1750                         id = lustre_idmap_lookup_gid(NULL, idmap, 0,
1751                                                      oqctl->qc_id);
1752                 else
1753                         RETURN(-EINVAL);
1754
1755                 if (id == CFS_IDMAP_NOTFOUND) {
1756                         CDEBUG(D_QUOTA, "no mapping for id %u\n",
1757                                oqctl->qc_id);
1758                         RETURN(-EACCES);
1759                 }
1760         }
1761
1762         rc = req_capsule_server_pack(pill);
1763         if (rc)
1764                 RETURN(rc);
1765
1766         repoqc = req_capsule_server_get(pill, &RMF_OBD_QUOTACTL);
1767         LASSERT(repoqc != NULL);
1768
1769         switch (oqctl->qc_cmd) {
1770         case Q_QUOTAON:
1771                 rc = mqo->mqo_on(info->mti_env, next, oqctl->qc_type);
1772                 break;
1773         case Q_QUOTAOFF:
1774                 rc = mqo->mqo_off(info->mti_env, next, oqctl->qc_type);
1775                 break;
1776         case Q_SETINFO:
1777                 rc = mqo->mqo_setinfo(info->mti_env, next, oqctl->qc_type, id,
1778                                       &oqctl->qc_dqinfo);
1779                 break;
1780         case Q_GETINFO:
1781                 rc = mqo->mqo_getinfo(info->mti_env, next, oqctl->qc_type, id,
1782                                       &oqctl->qc_dqinfo);
1783                 break;
1784         case Q_SETQUOTA:
1785                 rc = mqo->mqo_setquota(info->mti_env, next, oqctl->qc_type, id,
1786                                        &oqctl->qc_dqblk);
1787                 break;
1788         case Q_GETQUOTA:
1789                 rc = mqo->mqo_getquota(info->mti_env, next, oqctl->qc_type, id,
1790                                        &oqctl->qc_dqblk);
1791                 break;
1792         case Q_GETOINFO:
1793                 rc = mqo->mqo_getoinfo(info->mti_env, next, oqctl->qc_type, id,
1794                                        &oqctl->qc_dqinfo);
1795                 break;
1796         case Q_GETOQUOTA:
1797                 rc = mqo->mqo_getoquota(info->mti_env, next, oqctl->qc_type, id,
1798                                         &oqctl->qc_dqblk);
1799                 break;
1800         case LUSTRE_Q_INVALIDATE:
1801                 rc = mqo->mqo_invalidate(info->mti_env, next, oqctl->qc_type);
1802                 break;
1803         case LUSTRE_Q_FINVALIDATE:
1804                 rc = mqo->mqo_finvalidate(info->mti_env, next, oqctl->qc_type);
1805                 break;
1806         default:
1807                 CERROR("unsupported mdt_quotactl command: %d\n",
1808                        oqctl->qc_cmd);
1809                 RETURN(-EFAULT);
1810         }
1811
1812         *repoqc = *oqctl;
1813         RETURN(rc);
1814 }
1815 #endif
1816
1817
1818 /*
1819  * OBD PING and other handlers.
1820  */
1821 static int mdt_obd_ping(struct mdt_thread_info *info)
1822 {
1823         int rc;
1824         ENTRY;
1825
1826         req_capsule_set(info->mti_pill, &RQF_OBD_PING);
1827
1828         rc = target_handle_ping(mdt_info_req(info));
1829         if (rc < 0)
1830                 rc = err_serious(rc);
1831         RETURN(rc);
1832 }
1833
1834 static int mdt_obd_log_cancel(struct mdt_thread_info *info)
1835 {
1836         return err_serious(-EOPNOTSUPP);
1837 }
1838
1839 static int mdt_obd_qc_callback(struct mdt_thread_info *info)
1840 {
1841         return err_serious(-EOPNOTSUPP);
1842 }
1843
1844
1845 /*
1846  * LLOG handlers.
1847  */
1848
1849 /** clone llog ctxt from child (mdd)
1850  * This allows remote llog (replicator) access.
1851  * We can either pass all llog RPCs (eg mdt_llog_create) on to child where the
1852  * context was originally set up, or we can handle them directly.
1853  * I choose the latter, but that means I need any llog
1854  * contexts set up by child to be accessable by the mdt.  So we clone the
1855  * context into our context list here.
1856  */
1857 static int mdt_llog_ctxt_clone(const struct lu_env *env, struct mdt_device *mdt,
1858                                int idx)
1859 {
1860         struct md_device  *next = mdt->mdt_child;
1861         struct llog_ctxt *ctxt;
1862         int rc;
1863
1864         if (!llog_ctxt_null(mdt2obd_dev(mdt), idx))
1865                 return 0;
1866
1867         rc = next->md_ops->mdo_llog_ctxt_get(env, next, idx, (void **)&ctxt);
1868         if (rc || ctxt == NULL) {
1869                 CERROR("Can't get mdd ctxt %d\n", rc);
1870                 return rc;
1871         }
1872
1873         rc = llog_group_set_ctxt(&mdt2obd_dev(mdt)->obd_olg, ctxt, idx);
1874         if (rc)
1875                 CERROR("Can't set mdt ctxt %d\n", rc);
1876
1877         return rc;
1878 }
1879
1880 static int mdt_llog_ctxt_unclone(const struct lu_env *env,
1881                                  struct mdt_device *mdt, int idx)
1882 {
1883         struct llog_ctxt *ctxt;
1884
1885         ctxt = llog_get_context(mdt2obd_dev(mdt), idx);
1886         if (ctxt == NULL)
1887                 return 0;
1888         /* Put once for the get we just did, and once for the clone */
1889         llog_ctxt_put(ctxt);
1890         llog_ctxt_put(ctxt);
1891         return 0;
1892 }
1893
1894 static int mdt_llog_create(struct mdt_thread_info *info)
1895 {
1896         int rc;
1897
1898         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1899         rc = llog_origin_handle_create(mdt_info_req(info));
1900         return (rc < 0 ? err_serious(rc) : rc);
1901 }
1902
1903 static int mdt_llog_destroy(struct mdt_thread_info *info)
1904 {
1905         int rc;
1906
1907         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1908         rc = llog_origin_handle_destroy(mdt_info_req(info));
1909         return (rc < 0 ? err_serious(rc) : rc);
1910 }
1911
1912 static int mdt_llog_read_header(struct mdt_thread_info *info)
1913 {
1914         int rc;
1915
1916         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1917         rc = llog_origin_handle_read_header(mdt_info_req(info));
1918         return (rc < 0 ? err_serious(rc) : rc);
1919 }
1920
1921 static int mdt_llog_next_block(struct mdt_thread_info *info)
1922 {
1923         int rc;
1924
1925         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1926         rc = llog_origin_handle_next_block(mdt_info_req(info));
1927         return (rc < 0 ? err_serious(rc) : rc);
1928 }
1929
1930 static int mdt_llog_prev_block(struct mdt_thread_info *info)
1931 {
1932         int rc;
1933
1934         req_capsule_set(info->mti_pill, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1935         rc = llog_origin_handle_prev_block(mdt_info_req(info));
1936         return (rc < 0 ? err_serious(rc) : rc);
1937 }
1938
1939
1940 /*
1941  * DLM handlers.
1942  */
1943 static struct ldlm_callback_suite cbs = {
1944         .lcs_completion = ldlm_server_completion_ast,
1945         .lcs_blocking   = ldlm_server_blocking_ast,
1946         .lcs_glimpse    = NULL
1947 };
1948
1949 static int mdt_enqueue(struct mdt_thread_info *info)
1950 {
1951         struct ptlrpc_request *req;
1952         __u64 req_bits;
1953         int rc;
1954
1955         /*
1956          * info->mti_dlm_req already contains swapped and (if necessary)
1957          * converted dlm request.
1958          */
1959         LASSERT(info->mti_dlm_req != NULL);
1960
1961         req = mdt_info_req(info);
1962
1963         /*
1964          * Lock without inodebits makes no sense and will oops later in
1965          * ldlm. Let's check it now to see if we have wrong lock from client or
1966          * bits get corrupted somewhere in mdt_intent_policy().
1967          */
1968         req_bits = info->mti_dlm_req->lock_desc.l_policy_data.l_inodebits.bits;
1969         /* This is disabled because we need to support liblustre flock.
1970          * LASSERT(req_bits != 0);
1971          */
1972
1973         rc = ldlm_handle_enqueue0(info->mti_mdt->mdt_namespace,
1974                                   req, info->mti_dlm_req, &cbs);
1975         info->mti_fail_id = OBD_FAIL_LDLM_REPLY;
1976         return rc ? err_serious(rc) : req->rq_status;
1977 }
1978
1979 static int mdt_convert(struct mdt_thread_info *info)
1980 {
1981         int rc;
1982         struct ptlrpc_request *req;
1983
1984         LASSERT(info->mti_dlm_req);
1985         req = mdt_info_req(info);
1986         rc = ldlm_handle_convert0(req, info->mti_dlm_req);
1987         return rc ? err_serious(rc) : req->rq_status;
1988 }
1989
1990 static int mdt_bl_callback(struct mdt_thread_info *info)
1991 {
1992         CERROR("bl callbacks should not happen on MDS\n");
1993         LBUG();
1994         return err_serious(-EOPNOTSUPP);
1995 }
1996
1997 static int mdt_cp_callback(struct mdt_thread_info *info)
1998 {
1999         CERROR("cp callbacks should not happen on MDS\n");
2000         LBUG();
2001         return err_serious(-EOPNOTSUPP);
2002 }
2003
2004 /*
2005  * sec context handlers
2006  */
2007 static int mdt_sec_ctx_handle(struct mdt_thread_info *info)
2008 {
2009         int rc;
2010
2011         rc = mdt_handle_idmap(info);
2012
2013         if (unlikely(rc)) {
2014                 struct ptlrpc_request *req = mdt_info_req(info);
2015                 __u32                  opc;
2016
2017                 opc = lustre_msg_get_opc(req->rq_reqmsg);
2018                 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT)
2019                         sptlrpc_svc_ctx_invalidate(req);
2020         }
2021
2022         OBD_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, obd_fail_val);
2023
2024         return rc;
2025 }
2026
2027 static struct mdt_object *mdt_obj(struct lu_object *o)
2028 {
2029         LASSERT(lu_device_is_mdt(o->lo_dev));
2030         return container_of0(o, struct mdt_object, mot_obj.mo_lu);
2031 }
2032
2033 struct mdt_object *mdt_object_find(const struct lu_env *env,
2034                                    struct mdt_device *d,
2035                                    const struct lu_fid *f)
2036 {
2037         struct lu_object *o;
2038         struct mdt_object *m;
2039         ENTRY;
2040
2041         CDEBUG(D_INFO, "Find object for "DFID"\n", PFID(f));
2042         o = lu_object_find(env, &d->mdt_md_dev.md_lu_dev, f, NULL);
2043         if (unlikely(IS_ERR(o)))
2044                 m = (struct mdt_object *)o;
2045         else
2046                 m = mdt_obj(o);
2047         RETURN(m);
2048 }
2049
2050 /**
2051  * Asyncronous commit for mdt device.
2052  *
2053  * Pass asynchonous commit call down the MDS stack.
2054  *
2055  * \param env environment
2056  * \param mdt the mdt device
2057  */
2058 static void mdt_device_commit_async(const struct lu_env *env,
2059                                     struct mdt_device *mdt)
2060 {
2061         struct dt_device *dt = mdt->mdt_bottom;
2062         int rc;
2063
2064         rc = dt->dd_ops->dt_commit_async(env, dt);
2065         if (unlikely(rc != 0))
2066                 CWARN("async commit start failed with rc = %d", rc);
2067 }
2068
2069 /**
2070  * Mark the lock as "synchonous".
2071  *
2072  * Mark the lock to deffer transaction commit to the unlock time.
2073  *
2074  * \param lock the lock to mark as "synchonous"
2075  *
2076  * \see mdt_is_lock_sync
2077  * \see mdt_save_lock
2078  */
2079 static inline void mdt_set_lock_sync(struct ldlm_lock *lock)
2080 {
2081         lock->l_ast_data = (void*)1;
2082 }
2083
2084 /**
2085  * Check whehter the lock "synchonous" or not.
2086  *
2087  * \param lock the lock to check
2088  * \retval 1 the lock is "synchonous"
2089  * \retval 0 the lock isn't "synchronous"
2090  *
2091  * \see mdt_set_lock_sync
2092  * \see mdt_save_lock
2093  */
2094 static inline int mdt_is_lock_sync(struct ldlm_lock *lock)
2095 {
2096         return lock->l_ast_data != NULL;
2097 }
2098
2099 /**
2100  * Blocking AST for mdt locks.
2101  *
2102  * Starts transaction commit if in case of COS lock conflict or
2103  * deffers such a commit to the mdt_save_lock.
2104  *
2105  * \param lock the lock which blocks a request or cancelling lock
2106  * \param desc unused
2107  * \param data unused
2108  * \param flag indicates whether this cancelling or blocking callback
2109  * \retval 0
2110  * \see ldlm_blocking_ast_nocheck
2111  */
2112 int mdt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2113                      void *data, int flag)
2114 {
2115         struct obd_device *obd = lock->l_resource->lr_namespace->ns_obd;
2116         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
2117         int rc;
2118         ENTRY;
2119
2120         if (flag == LDLM_CB_CANCELING)
2121                 RETURN(0);
2122         lock_res_and_lock(lock);
2123         if (lock->l_blocking_ast != mdt_blocking_ast) {
2124                 unlock_res_and_lock(lock);
2125                 RETURN(0);
2126         }
2127         if (mdt_cos_is_enabled(mdt) &&
2128             lock->l_req_mode & (LCK_PW | LCK_EX) &&
2129             lock->l_blocking_lock != NULL &&
2130             lock->l_client_cookie != lock->l_blocking_lock->l_client_cookie) {
2131                 mdt_set_lock_sync(lock);
2132         }
2133         rc = ldlm_blocking_ast_nocheck(lock);
2134
2135         /* There is no lock conflict if l_blocking_lock == NULL,
2136          * it indicates a blocking ast sent from ldlm_lock_decref_internal
2137          * when the last reference to a local lock was released */
2138         if (lock->l_req_mode == LCK_COS && lock->l_blocking_lock != NULL) {
2139                 struct lu_env env;
2140
2141                 rc = lu_env_init(&env, LCT_MD_THREAD);
2142                 if (unlikely(rc != 0))
2143                         CWARN("lu_env initialization failed with rc = %d,"
2144                               "cannot start asynchronous commit\n", rc);
2145                 else
2146                         mdt_device_commit_async(&env, mdt);
2147                 lu_env_fini(&env);
2148         }
2149         RETURN(rc);
2150 }
2151
2152 int mdt_object_lock(struct mdt_thread_info *info, struct mdt_object *o,
2153                     struct mdt_lock_handle *lh, __u64 ibits, int locality)
2154 {
2155         struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
2156         ldlm_policy_data_t *policy = &info->mti_policy;
2157         struct ldlm_res_id *res_id = &info->mti_res_id;
2158         int rc;
2159         ENTRY;
2160
2161         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2162         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2163         LASSERT(lh->mlh_reg_mode != LCK_MINMODE);
2164         LASSERT(lh->mlh_type != MDT_NUL_LOCK);
2165
2166         if (mdt_object_exists(o) < 0) {
2167                 if (locality == MDT_CROSS_LOCK) {
2168                         /* cross-ref object fix */
2169                         ibits &= ~MDS_INODELOCK_UPDATE;
2170                         ibits |= MDS_INODELOCK_LOOKUP;
2171                 } else {
2172                         LASSERT(!(ibits & MDS_INODELOCK_UPDATE));
2173                         LASSERT(ibits & MDS_INODELOCK_LOOKUP);
2174                 }
2175                 /* No PDO lock on remote object */
2176                 LASSERT(lh->mlh_type != MDT_PDO_LOCK);
2177         }
2178
2179         if (lh->mlh_type == MDT_PDO_LOCK) {
2180                 /* check for exists after object is locked */
2181                 if (mdt_object_exists(o) == 0) {
2182                         /* Non-existent object shouldn't have PDO lock */
2183                         RETURN(-ESTALE);
2184                 } else {
2185                         /* Non-dir object shouldn't have PDO lock */
2186                         LASSERT(S_ISDIR(lu_object_attr(&o->mot_obj.mo_lu)));
2187                 }
2188         }
2189
2190         memset(policy, 0, sizeof(*policy));
2191         fid_build_reg_res_name(mdt_object_fid(o), res_id);
2192
2193         /*
2194          * Take PDO lock on whole directory and build correct @res_id for lock
2195          * on part of directory.
2196          */
2197         if (lh->mlh_pdo_hash != 0) {
2198                 LASSERT(lh->mlh_type == MDT_PDO_LOCK);
2199                 mdt_lock_pdo_mode(info, o, lh);
2200                 if (lh->mlh_pdo_mode != LCK_NL) {
2201                         /*
2202                          * Do not use LDLM_FL_LOCAL_ONLY for parallel lock, it
2203                          * is never going to be sent to client and we do not
2204                          * want it slowed down due to possible cancels.
2205                          */
2206                         policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
2207                         rc = mdt_fid_lock(ns, &lh->mlh_pdo_lh, lh->mlh_pdo_mode,
2208                                           policy, res_id, LDLM_FL_ATOMIC_CB,
2209                                           &info->mti_exp->exp_handle.h_cookie);
2210                         if (unlikely(rc))
2211                                 RETURN(rc);
2212                 }
2213
2214                 /*
2215                  * Finish res_id initializing by name hash marking part of
2216                  * directory which is taking modification.
2217                  */
2218                 res_id->name[LUSTRE_RES_ID_HSH_OFF] = lh->mlh_pdo_hash;
2219         }
2220
2221         policy->l_inodebits.bits = ibits;
2222
2223         /*
2224          * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
2225          * going to be sent to client. If it is - mdt_intent_policy() path will
2226          * fix it up and turn FL_LOCAL flag off.
2227          */
2228         rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy,
2229                           res_id, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB,
2230                           &info->mti_exp->exp_handle.h_cookie);
2231         if (rc)
2232                 GOTO(out, rc);
2233
2234 out:
2235         if (rc)
2236                 mdt_object_unlock(info, o, lh, 1);
2237
2238
2239         RETURN(rc);
2240 }
2241
2242 /**
2243  * Save a lock within request object.
2244  *
2245  * Keep the lock referenced until whether client ACK or transaction
2246  * commit happens or release the lock immediately depending on input
2247  * parameters. If COS is ON, a write lock is converted to COS lock
2248  * before saving.
2249  *
2250  * \param info thead info object
2251  * \param h lock handle
2252  * \param mode lock mode
2253  * \param decref force immediate lock releasing
2254  */
2255 static
2256 void mdt_save_lock(struct mdt_thread_info *info, struct lustre_handle *h,
2257                    ldlm_mode_t mode, int decref)
2258 {
2259         ENTRY;
2260
2261         if (lustre_handle_is_used(h)) {
2262                 if (decref || !info->mti_has_trans ||
2263                     !(mode & (LCK_PW | LCK_EX))){
2264                         mdt_fid_unlock(h, mode);
2265                 } else {
2266                         struct mdt_device *mdt = info->mti_mdt;
2267                         struct ldlm_lock *lock = ldlm_handle2lock(h);
2268                         struct ptlrpc_request *req = mdt_info_req(info);
2269                         int no_ack = 0;
2270
2271                         LASSERTF(lock != NULL, "no lock for cookie "LPX64"\n",
2272                                  h->cookie);
2273                         CDEBUG(D_HA, "request = %p reply state = %p"
2274                                " transno = "LPD64"\n",
2275                                req, req->rq_reply_state, req->rq_transno);
2276                         if (mdt_cos_is_enabled(mdt)) {
2277                                 no_ack = 1;
2278                                 ldlm_lock_downgrade(lock, LCK_COS);
2279                                 mode = LCK_COS;
2280                         }
2281                         ptlrpc_save_lock(req, h, mode, no_ack);
2282                         if (mdt_is_lock_sync(lock)) {
2283                                 CDEBUG(D_HA, "found sync-lock,"
2284                                        " async commit started\n");
2285                                 mdt_device_commit_async(info->mti_env,
2286                                                         mdt);
2287                         }
2288                         LDLM_LOCK_PUT(lock);
2289                 }
2290                 h->cookie = 0ull;
2291         }
2292
2293         EXIT;
2294 }
2295
2296 /**
2297  * Unlock mdt object.
2298  *
2299  * Immeditely release the regular lock and the PDO lock or save the
2300  * lock in reqeuest and keep them referenced until client ACK or
2301  * transaction commit.
2302  *
2303  * \param info thread info object
2304  * \param o mdt object
2305  * \param lh mdt lock handle referencing regular and PDO locks
2306  * \param decref force immediate lock releasing
2307  */
2308 void mdt_object_unlock(struct mdt_thread_info *info, struct mdt_object *o,
2309                        struct mdt_lock_handle *lh, int decref)
2310 {
2311         ENTRY;
2312
2313         mdt_save_lock(info, &lh->mlh_pdo_lh, lh->mlh_pdo_mode, decref);
2314         mdt_save_lock(info, &lh->mlh_reg_lh, lh->mlh_reg_mode, decref);
2315
2316         EXIT;
2317 }
2318
2319 struct mdt_object *mdt_object_find_lock(struct mdt_thread_info *info,
2320                                         const struct lu_fid *f,
2321                                         struct mdt_lock_handle *lh,
2322                                         __u64 ibits)
2323 {
2324         struct mdt_object *o;
2325
2326         o = mdt_object_find(info->mti_env, info->mti_mdt, f);
2327         if (!IS_ERR(o)) {
2328                 int rc;
2329
2330                 rc = mdt_object_lock(info, o, lh, ibits,
2331                                      MDT_LOCAL_LOCK);
2332                 if (rc != 0) {
2333                         mdt_object_put(info->mti_env, o);
2334                         o = ERR_PTR(rc);
2335                 }
2336         }
2337         return o;
2338 }
2339
2340 void mdt_object_unlock_put(struct mdt_thread_info * info,
2341                            struct mdt_object * o,
2342                            struct mdt_lock_handle *lh,
2343                            int decref)
2344 {
2345         mdt_object_unlock(info, o, lh, decref);
2346         mdt_object_put(info->mti_env, o);
2347 }
2348
2349 static struct mdt_handler *mdt_handler_find(__u32 opc,
2350                                             struct mdt_opc_slice *supported)
2351 {
2352         struct mdt_opc_slice *s;
2353         struct mdt_handler   *h;
2354
2355         h = NULL;
2356         for (s = supported; s->mos_hs != NULL; s++) {
2357                 if (s->mos_opc_start <= opc && opc < s->mos_opc_end) {
2358                         h = s->mos_hs + (opc - s->mos_opc_start);
2359                         if (likely(h->mh_opc != 0))
2360                                 LASSERTF(h->mh_opc == opc,
2361                                          "opcode mismatch %d != %d\n",
2362                                          h->mh_opc, opc);
2363                         else
2364                                 h = NULL; /* unsupported opc */
2365                         break;
2366                 }
2367         }
2368         return h;
2369 }
2370
2371 static int mdt_lock_resname_compat(struct mdt_device *m,
2372                                    struct ldlm_request *req)
2373 {
2374         /* XXX something... later. */
2375         return 0;
2376 }
2377
2378 static int mdt_lock_reply_compat(struct mdt_device *m, struct ldlm_reply *rep)
2379 {
2380         /* XXX something... later. */
2381         return 0;
2382 }
2383
2384 /*
2385  * Generic code handling requests that have struct mdt_body passed in:
2386  *
2387  *  - extract mdt_body from request and save it in @info, if present;
2388  *
2389  *  - create lu_object, corresponding to the fid in mdt_body, and save it in
2390  *  @info;
2391  *
2392  *  - if HABEO_CORPUS flag is set for this request type check whether object
2393  *  actually exists on storage (lu_object_exists()).
2394  *
2395  */
2396 static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
2397 {
2398         const struct mdt_body    *body;
2399         struct mdt_object        *obj;
2400         const struct lu_env      *env;
2401         struct req_capsule       *pill;
2402         int                       rc;
2403         ENTRY;
2404
2405         env = info->mti_env;
2406         pill = info->mti_pill;
2407
2408         body = info->mti_body = req_capsule_client_get(pill, &RMF_MDT_BODY);
2409         if (body == NULL)
2410                 RETURN(-EFAULT);
2411
2412         if (!(body->valid & OBD_MD_FLID))
2413                 RETURN(0);
2414
2415         if (!fid_is_sane(&body->fid1)) {
2416                 CERROR("Invalid fid: "DFID"\n", PFID(&body->fid1));
2417                 RETURN(-EINVAL);
2418         }
2419
2420         /*
2421          * Do not get size or any capa fields before we check that request
2422          * contains capa actually. There are some requests which do not, for
2423          * instance MDS_IS_SUBDIR.
2424          */
2425         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
2426             req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
2427                 mdt_set_capainfo(info, 0, &body->fid1,
2428                                  req_capsule_client_get(pill, &RMF_CAPA1));
2429
2430         obj = mdt_object_find(env, info->mti_mdt, &body->fid1);
2431         if (!IS_ERR(obj)) {
2432                 if ((flags & HABEO_CORPUS) &&
2433                     !mdt_object_exists(obj)) {
2434                         mdt_object_put(env, obj);
2435                         /* for capability renew ENOENT will be handled in
2436                          * mdt_renew_capa */
2437                         if (body->valid & OBD_MD_FLOSSCAPA)
2438                                 rc = 0;
2439                         else
2440                                 rc = -ENOENT;
2441                 } else {
2442                         info->mti_object = obj;
2443                         rc = 0;
2444                 }
2445         } else
2446                 rc = PTR_ERR(obj);
2447
2448         RETURN(rc);
2449 }
2450
2451 static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info, __u32 flags)
2452 {
2453         struct req_capsule *pill = info->mti_pill;
2454         int rc;
2455         ENTRY;
2456
2457         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT))
2458                 rc = mdt_body_unpack(info, flags);
2459         else
2460                 rc = 0;
2461
2462         if (rc == 0 && (flags & HABEO_REFERO)) {
2463                 struct mdt_device *mdt = info->mti_mdt;
2464
2465                 /* Pack reply. */
2466
2467                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
2468                         req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
2469                                              mdt->mdt_max_mdsize);
2470                 if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
2471                         req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER,
2472                                              mdt->mdt_max_cookiesize);
2473
2474                 rc = req_capsule_server_pack(pill);
2475         }
2476         RETURN(rc);
2477 }
2478
2479 static int mdt_init_capa_ctxt(const struct lu_env *env, struct mdt_device *m)
2480 {
2481         struct md_device *next = m->mdt_child;
2482
2483         return next->md_ops->mdo_init_capa_ctxt(env, next,
2484                                                 m->mdt_opts.mo_mds_capa,
2485                                                 m->mdt_capa_timeout,
2486                                                 m->mdt_capa_alg,
2487                                                 m->mdt_capa_keys);
2488 }
2489
2490 /*
2491  * Invoke handler for this request opc. Also do necessary preprocessing
2492  * (according to handler ->mh_flags), and post-processing (setting of
2493  * ->last_{xid,committed}).
2494  */
2495 static int mdt_req_handle(struct mdt_thread_info *info,
2496                           struct mdt_handler *h, struct ptlrpc_request *req)
2497 {
2498         int   rc, serious = 0;
2499         __u32 flags;
2500
2501         ENTRY;
2502
2503         LASSERT(h->mh_act != NULL);
2504         LASSERT(h->mh_opc == lustre_msg_get_opc(req->rq_reqmsg));
2505         LASSERT(current->journal_info == NULL);
2506
2507         /*
2508          * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
2509          * to put same checks into handlers like mdt_close(), mdt_reint(),
2510          * etc., without talking to mdt authors first. Checking same thing
2511          * there again is useless and returning 0 error without packing reply
2512          * is buggy! Handlers either pack reply or return error.
2513          *
2514          * We return 0 here and do not send any reply in order to emulate
2515          * network failure. Do not send any reply in case any of NET related
2516          * fail_id has occured.
2517          */
2518         if (OBD_FAIL_CHECK_ORSET(h->mh_fail_id, OBD_FAIL_ONCE))
2519                 RETURN(0);
2520
2521         rc = 0;
2522         flags = h->mh_flags;
2523         LASSERT(ergo(flags & (HABEO_CORPUS|HABEO_REFERO), h->mh_fmt != NULL));
2524
2525         if (h->mh_fmt != NULL) {
2526                 req_capsule_set(info->mti_pill, h->mh_fmt);
2527                 rc = mdt_unpack_req_pack_rep(info, flags);
2528         }
2529
2530         if (rc == 0 && flags & MUTABOR &&
2531             req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
2532                 /* should it be rq_status? */
2533                 rc = -EROFS;
2534
2535         if (rc == 0 && flags & HABEO_CLAVIS) {
2536                 struct ldlm_request *dlm_req;
2537
2538                 LASSERT(h->mh_fmt != NULL);
2539
2540                 dlm_req = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
2541                 if (dlm_req != NULL) {
2542                         if (info->mti_mdt->mdt_opts.mo_compat_resname)
2543                                 rc = mdt_lock_resname_compat(info->mti_mdt,
2544                                                              dlm_req);
2545                         info->mti_dlm_req = dlm_req;
2546                 } else {
2547                         rc = -EFAULT;
2548                 }
2549         }
2550
2551         /* capability setting changed via /proc, needs reinitialize ctxt */
2552         if (info->mti_mdt && info->mti_mdt->mdt_capa_conf) {
2553                 mdt_init_capa_ctxt(info->mti_env, info->mti_mdt);
2554                 info->mti_mdt->mdt_capa_conf = 0;
2555         }
2556
2557         if (likely(rc == 0)) {
2558                 /*
2559                  * Process request, there can be two types of rc:
2560                  * 1) errors with msg unpack/pack, other failures outside the
2561                  * operation itself. This is counted as serious errors;
2562                  * 2) errors during fs operation, should be placed in rq_status
2563                  * only
2564                  */
2565                 rc = h->mh_act(info);
2566                 if (rc == 0 &&
2567                     !req->rq_no_reply && req->rq_reply_state == NULL) {
2568                         DEBUG_REQ(D_ERROR, req, "MDT \"handler\" %s did not "
2569                                   "pack reply and returned 0 error\n",
2570                                   h->mh_name);
2571                         LBUG();
2572                 }
2573                 serious = is_serious(rc);
2574                 rc = clear_serious(rc);
2575         } else
2576                 serious = 1;
2577
2578         req->rq_status = rc;
2579
2580         /*
2581          * ELDLM_* codes which > 0 should be in rq_status only as well as
2582          * all non-serious errors.
2583          */
2584         if (rc > 0 || !serious)
2585                 rc = 0;
2586
2587         LASSERT(current->journal_info == NULL);
2588
2589         if (rc == 0 && (flags & HABEO_CLAVIS) &&
2590             info->mti_mdt->mdt_opts.mo_compat_resname) {
2591                 struct ldlm_reply *dlmrep;
2592
2593                 dlmrep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
2594                 if (dlmrep != NULL)
2595                         rc = mdt_lock_reply_compat(info->mti_mdt, dlmrep);
2596         }
2597
2598         /* If we're DISCONNECTing, the mdt_export_data is already freed */
2599         if (likely(rc == 0 && req->rq_export && h->mh_opc != MDS_DISCONNECT))
2600                 target_committed_to_req(req);
2601
2602         if (unlikely((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
2603                      lustre_msg_get_transno(req->rq_reqmsg) == 0)) {
2604                 DEBUG_REQ(D_ERROR, req, "transno is 0 during REPLAY");
2605                 LBUG();
2606         }
2607
2608         target_send_reply(req, rc, info->mti_fail_id);
2609         RETURN(0);
2610 }
2611
2612 void mdt_lock_handle_init(struct mdt_lock_handle *lh)
2613 {
2614         lh->mlh_type = MDT_NUL_LOCK;
2615         lh->mlh_reg_lh.cookie = 0ull;
2616         lh->mlh_reg_mode = LCK_MINMODE;
2617         lh->mlh_pdo_lh.cookie = 0ull;
2618         lh->mlh_pdo_mode = LCK_MINMODE;
2619 }
2620
2621 void mdt_lock_handle_fini(struct mdt_lock_handle *lh)
2622 {
2623         LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
2624         LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
2625 }
2626
2627 /*
2628  * Initialize fields of struct mdt_thread_info. Other fields are left in
2629  * uninitialized state, because it's too expensive to zero out whole
2630  * mdt_thread_info (> 1K) on each request arrival.
2631  */
2632 static void mdt_thread_info_init(struct ptlrpc_request *req,
2633                                  struct mdt_thread_info *info)
2634 {
2635         int i;
2636         struct md_capainfo *ci;
2637
2638         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2639         info->mti_pill = &req->rq_pill;
2640
2641         /* lock handle */
2642         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
2643                 mdt_lock_handle_init(&info->mti_lh[i]);
2644
2645         /* mdt device: it can be NULL while CONNECT */
2646         if (req->rq_export) {
2647                 info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
2648                 info->mti_exp = req->rq_export;
2649         } else
2650                 info->mti_mdt = NULL;
2651         info->mti_env = req->rq_svc_thread->t_env;
2652         ci = md_capainfo(info->mti_env);
2653         memset(ci, 0, sizeof *ci);
2654         if (req->rq_export) {
2655                 if (exp_connect_rmtclient(req->rq_export))
2656                         ci->mc_auth = LC_ID_CONVERT;
2657                 else if (req->rq_export->exp_connect_flags &
2658                          OBD_CONNECT_MDS_CAPA)
2659                         ci->mc_auth = LC_ID_PLAIN;
2660                 else
2661                         ci->mc_auth = LC_ID_NONE;
2662         }
2663
2664         info->mti_fail_id = OBD_FAIL_MDS_ALL_REPLY_NET;
2665         info->mti_transno = lustre_msg_get_transno(req->rq_reqmsg);
2666         info->mti_mos[0] = NULL;
2667         info->mti_mos[1] = NULL;
2668         info->mti_mos[2] = NULL;
2669         info->mti_mos[3] = NULL;
2670
2671         memset(&info->mti_attr, 0, sizeof(info->mti_attr));
2672         info->mti_body = NULL;
2673         info->mti_object = NULL;
2674         info->mti_dlm_req = NULL;
2675         info->mti_has_trans = 0;
2676         info->mti_no_need_trans = 0;
2677         info->mti_cross_ref = 0;
2678         info->mti_opdata = 0;
2679
2680         /* To not check for split by default. */
2681         info->mti_spec.sp_ck_split = 0;
2682         info->mti_spec.no_create = 0;
2683 }
2684
2685 static void mdt_thread_info_fini(struct mdt_thread_info *info)
2686 {
2687         int i;
2688
2689         req_capsule_fini(info->mti_pill);
2690         if (info->mti_object != NULL) {
2691                 /*
2692                  * freeing an object may lead to OSD level transaction, do not
2693                  * let it mess with MDT. bz19385.
2694                  */
2695                 info->mti_no_need_trans = 1;
2696                 mdt_object_put(info->mti_env, info->mti_object);
2697                 info->mti_object = NULL;
2698         }
2699         for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
2700                 mdt_lock_handle_fini(&info->mti_lh[i]);
2701         info->mti_env = NULL;
2702 }
2703
2704 static int mdt_filter_recovery_request(struct ptlrpc_request *req,
2705                                        struct obd_device *obd, int *process)
2706 {
2707         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2708         case MDS_CONNECT: /* This will never get here, but for completeness. */
2709         case OST_CONNECT: /* This will never get here, but for completeness. */
2710         case MDS_DISCONNECT:
2711         case OST_DISCONNECT:
2712                *process = 1;
2713                RETURN(0);
2714
2715         case MDS_CLOSE:
2716         case MDS_DONE_WRITING:
2717         case MDS_SYNC: /* used in unmounting */
2718         case OBD_PING:
2719         case MDS_REINT:
2720         case SEQ_QUERY:
2721         case FLD_QUERY:
2722         case LDLM_ENQUEUE:
2723                 *process = target_queue_recovery_request(req, obd);
2724                 RETURN(0);
2725
2726         default:
2727                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
2728                 *process = -EAGAIN;
2729                 RETURN(0);
2730         }
2731 }
2732
2733 /*
2734  * Handle recovery. Return:
2735  *        +1: continue request processing;
2736  *       -ve: abort immediately with the given error code;
2737  *         0: send reply with error code in req->rq_status;
2738  */
2739 static int mdt_recovery(struct mdt_thread_info *info)
2740 {
2741         struct ptlrpc_request *req = mdt_info_req(info);
2742         int recovering;
2743         struct obd_device *obd;
2744
2745         ENTRY;
2746
2747         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2748         case MDS_CONNECT:
2749         case SEC_CTX_INIT:
2750         case SEC_CTX_INIT_CONT:
2751         case SEC_CTX_FINI:
2752                 {
2753 #if 0
2754                         int rc;
2755
2756                         rc = mdt_handle_idmap(info);
2757                         if (rc)
2758                                 RETURN(rc);
2759                         else
2760 #endif
2761                                 RETURN(+1);
2762                 }
2763         }
2764
2765         if (unlikely(req->rq_export == NULL)) {
2766                 CERROR("operation %d on unconnected MDS from %s\n",
2767                        lustre_msg_get_opc(req->rq_reqmsg),
2768                        libcfs_id2str(req->rq_peer));
2769                 /* FIXME: For CMD cleanup, when mds_B stop, the req from
2770                  * mds_A will get -ENOTCONN(especially for ping req),
2771                  * which will cause that mds_A deactive timeout, then when
2772                  * mds_A cleanup, the cleanup process will be suspended since
2773                  * deactive timeout is not zero.
2774                  */
2775                 req->rq_status = -ENOTCONN;
2776                 target_send_reply(req, -ENOTCONN, info->mti_fail_id);
2777                 RETURN(0);
2778         }
2779
2780         /* sanity check: if the xid matches, the request must be marked as a
2781          * resent or replayed */
2782         if (req_xid_is_last(req)) {
2783                 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
2784                       (MSG_RESENT | MSG_REPLAY))) {
2785                         DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches last_xid, "
2786                                   "expected REPLAY or RESENT flag (%x)", req->rq_xid,
2787                                   lustre_msg_get_flags(req->rq_reqmsg));
2788                         LBUG();
2789                         req->rq_status = -ENOTCONN;
2790                         RETURN(-ENOTCONN);
2791                 }
2792         }
2793
2794         /* else: note the opposite is not always true; a RESENT req after a
2795          * failover will usually not match the last_xid, since it was likely
2796          * never committed. A REPLAYed request will almost never match the
2797          * last xid, however it could for a committed, but still retained,
2798          * open. */
2799
2800         obd = req->rq_export->exp_obd;
2801
2802         /* Check for aborted recovery... */
2803         spin_lock_bh(&obd->obd_processing_task_lock);
2804         recovering = obd->obd_recovering;
2805         spin_unlock_bh(&obd->obd_processing_task_lock);
2806         if (unlikely(recovering)) {
2807                 int rc;
2808                 int should_process;
2809                 DEBUG_REQ(D_INFO, req, "Got new replay");
2810                 rc = mdt_filter_recovery_request(req, obd, &should_process);
2811                 if (rc != 0 || !should_process)
2812                         RETURN(rc);
2813                 else if (should_process < 0) {
2814                         req->rq_status = should_process;
2815                         rc = ptlrpc_error(req);
2816                         RETURN(rc);
2817                 }
2818         }
2819         RETURN(+1);
2820 }
2821
2822 static int mdt_msg_check_version(struct lustre_msg *msg)
2823 {
2824         int rc;
2825
2826         switch (lustre_msg_get_opc(msg)) {
2827         case MDS_CONNECT:
2828         case MDS_DISCONNECT:
2829         case MDS_SET_INFO:
2830         case OBD_PING:
2831         case SEC_CTX_INIT:
2832         case SEC_CTX_INIT_CONT:
2833         case SEC_CTX_FINI:
2834                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
2835                 if (rc)
2836                         CERROR("bad opc %u version %08x, expecting %08x\n",
2837                                lustre_msg_get_opc(msg),
2838                                lustre_msg_get_version(msg),
2839                                LUSTRE_OBD_VERSION);
2840                 break;
2841         case MDS_GETSTATUS:
2842         case MDS_GETATTR:
2843         case MDS_GETATTR_NAME:
2844         case MDS_STATFS:
2845         case MDS_READPAGE:
2846         case MDS_WRITEPAGE:
2847         case MDS_IS_SUBDIR:
2848         case MDS_REINT:
2849         case MDS_CLOSE:
2850         case MDS_DONE_WRITING:
2851         case MDS_PIN:
2852         case MDS_SYNC:
2853         case MDS_GETXATTR:
2854         case MDS_SETXATTR:
2855         case MDS_GET_INFO:
2856         case MDS_QUOTACHECK:
2857         case MDS_QUOTACTL:
2858         case QUOTA_DQACQ:
2859         case QUOTA_DQREL:
2860         case SEQ_QUERY:
2861         case FLD_QUERY:
2862                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
2863                 if (rc)
2864                         CERROR("bad opc %u version %08x, expecting %08x\n",
2865                                lustre_msg_get_opc(msg),
2866                                lustre_msg_get_version(msg),
2867                                LUSTRE_MDS_VERSION);
2868                 break;
2869         case LDLM_ENQUEUE:
2870         case LDLM_CONVERT:
2871         case LDLM_BL_CALLBACK:
2872         case LDLM_CP_CALLBACK:
2873                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
2874                 if (rc)
2875                         CERROR("bad opc %u version %08x, expecting %08x\n",
2876                                lustre_msg_get_opc(msg),
2877                                lustre_msg_get_version(msg),
2878                                LUSTRE_DLM_VERSION);
2879                 break;
2880         case OBD_LOG_CANCEL:
2881         case LLOG_ORIGIN_HANDLE_CREATE:
2882         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
2883         case LLOG_ORIGIN_HANDLE_READ_HEADER:
2884         case LLOG_ORIGIN_HANDLE_CLOSE:
2885         case LLOG_ORIGIN_HANDLE_DESTROY:
2886         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
2887         case LLOG_CATINFO:
2888                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
2889                 if (rc)
2890                         CERROR("bad opc %u version %08x, expecting %08x\n",
2891                                lustre_msg_get_opc(msg),
2892                                lustre_msg_get_version(msg),
2893                                LUSTRE_LOG_VERSION);
2894                 break;
2895         default:
2896                 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
2897                 rc = -ENOTSUPP;
2898         }
2899         return rc;
2900 }
2901
2902 static int mdt_handle0(struct ptlrpc_request *req,
2903                        struct mdt_thread_info *info,
2904                        struct mdt_opc_slice *supported)
2905 {
2906         struct mdt_handler *h;
2907         struct lustre_msg  *msg;
2908         int                 rc;
2909
2910         ENTRY;
2911
2912         if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_MDS_ALL_REQUEST_NET, OBD_FAIL_ONCE))
2913                 RETURN(0);
2914
2915         LASSERT(current->journal_info == NULL);
2916
2917         msg = req->rq_reqmsg;
2918         rc = mdt_msg_check_version(msg);
2919         if (likely(rc == 0)) {
2920                 rc = mdt_recovery(info);
2921                 if (likely(rc == +1)) {
2922                         h = mdt_handler_find(lustre_msg_get_opc(msg),
2923                                              supported);
2924                         if (likely(h != NULL)) {
2925                                 rc = mdt_req_handle(info, h, req);
2926                         } else {
2927                                 CERROR("The unsupported opc: 0x%x\n",
2928                                        lustre_msg_get_opc(msg) );
2929                                 req->rq_status = -ENOTSUPP;
2930                                 rc = ptlrpc_error(req);
2931                                 RETURN(rc);
2932                         }
2933                 }
2934         } else
2935                 CERROR(LUSTRE_MDT_NAME" drops mal-formed request\n");
2936         RETURN(rc);
2937 }
2938
2939 /*
2940  * MDT handler function called by ptlrpc service thread when request comes.
2941  *
2942  * XXX common "target" functionality should be factored into separate module
2943  * shared by mdt, ost and stand-alone services like fld.
2944  */
2945 static int mdt_handle_common(struct ptlrpc_request *req,
2946                              struct mdt_opc_slice *supported)
2947 {
2948         struct lu_env          *env;
2949         struct mdt_thread_info *info;
2950         int                     rc;
2951         ENTRY;
2952
2953         env = req->rq_svc_thread->t_env;
2954         LASSERT(env != NULL);
2955         LASSERT(env->le_ses != NULL);
2956         LASSERT(env->le_ctx.lc_thread == req->rq_svc_thread);
2957         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
2958         LASSERT(info != NULL);
2959
2960         mdt_thread_info_init(req, info);
2961
2962         rc = mdt_handle0(req, info, supported);
2963
2964         mdt_thread_info_fini(info);
2965         RETURN(rc);
2966 }
2967
2968 /*
2969  * This is called from recovery code as handler of _all_ RPC types, FLD and SEQ
2970  * as well.
2971  */
2972 int mdt_recovery_handle(struct ptlrpc_request *req)
2973 {
2974         int rc;
2975         ENTRY;
2976
2977         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2978         case FLD_QUERY:
2979                 rc = mdt_handle_common(req, mdt_fld_handlers);
2980                 break;
2981         case SEQ_QUERY:
2982                 rc = mdt_handle_common(req, mdt_seq_handlers);
2983                 break;
2984         default:
2985                 rc = mdt_handle_common(req, mdt_regular_handlers);
2986                 break;
2987         }
2988
2989         RETURN(rc);
2990 }
2991
2992 static int mdt_regular_handle(struct ptlrpc_request *req)
2993 {
2994         return mdt_handle_common(req, mdt_regular_handlers);
2995 }
2996
2997 static int mdt_readpage_handle(struct ptlrpc_request *req)
2998 {
2999         return mdt_handle_common(req, mdt_readpage_handlers);
3000 }
3001
3002 static int mdt_xmds_handle(struct ptlrpc_request *req)
3003 {
3004         return mdt_handle_common(req, mdt_xmds_handlers);
3005 }
3006
3007 static int mdt_mdsc_handle(struct ptlrpc_request *req)
3008 {
3009         return mdt_handle_common(req, mdt_seq_handlers);
3010 }
3011
3012 static int mdt_mdss_handle(struct ptlrpc_request *req)
3013 {
3014         return mdt_handle_common(req, mdt_seq_handlers);
3015 }
3016
3017 static int mdt_dtss_handle(struct ptlrpc_request *req)
3018 {
3019         return mdt_handle_common(req, mdt_seq_handlers);
3020 }
3021
3022 static int mdt_fld_handle(struct ptlrpc_request *req)
3023 {
3024         return mdt_handle_common(req, mdt_fld_handlers);
3025 }
3026
3027 enum mdt_it_code {
3028         MDT_IT_OPEN,
3029         MDT_IT_OCREAT,
3030         MDT_IT_CREATE,
3031         MDT_IT_GETATTR,
3032         MDT_IT_READDIR,
3033         MDT_IT_LOOKUP,
3034         MDT_IT_UNLINK,
3035         MDT_IT_TRUNC,
3036         MDT_IT_GETXATTR,
3037         MDT_IT_NR
3038 };
3039
3040 static int mdt_intent_getattr(enum mdt_it_code opcode,
3041                               struct mdt_thread_info *info,
3042                               struct ldlm_lock **,
3043                               int);
3044 static int mdt_intent_reint(enum mdt_it_code opcode,
3045                             struct mdt_thread_info *info,
3046                             struct ldlm_lock **,
3047                             int);
3048
3049 static struct mdt_it_flavor {
3050         const struct req_format *it_fmt;
3051         __u32                    it_flags;
3052         int                    (*it_act)(enum mdt_it_code ,
3053                                          struct mdt_thread_info *,
3054                                          struct ldlm_lock **,
3055                                          int);
3056         long                     it_reint;
3057 } mdt_it_flavor[] = {
3058         [MDT_IT_OPEN]     = {
3059                 .it_fmt   = &RQF_LDLM_INTENT,
3060                 /*.it_flags = HABEO_REFERO,*/
3061                 .it_flags = 0,
3062                 .it_act   = mdt_intent_reint,
3063                 .it_reint = REINT_OPEN
3064         },
3065         [MDT_IT_OCREAT]   = {
3066                 .it_fmt   = &RQF_LDLM_INTENT,
3067                 .it_flags = MUTABOR,
3068                 .it_act   = mdt_intent_reint,
3069                 .it_reint = REINT_OPEN
3070         },
3071         [MDT_IT_CREATE]   = {
3072                 .it_fmt   = &RQF_LDLM_INTENT,
3073                 .it_flags = MUTABOR,
3074                 .it_act   = mdt_intent_reint,
3075                 .it_reint = REINT_CREATE
3076         },
3077         [MDT_IT_GETATTR]  = {
3078                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3079                 .it_flags = HABEO_REFERO,
3080                 .it_act   = mdt_intent_getattr
3081         },
3082         [MDT_IT_READDIR]  = {
3083                 .it_fmt   = NULL,
3084                 .it_flags = 0,
3085                 .it_act   = NULL
3086         },
3087         [MDT_IT_LOOKUP]   = {
3088                 .it_fmt   = &RQF_LDLM_INTENT_GETATTR,
3089                 .it_flags = HABEO_REFERO,
3090                 .it_act   = mdt_intent_getattr
3091         },
3092         [MDT_IT_UNLINK]   = {
3093                 .it_fmt   = &RQF_LDLM_INTENT_UNLINK,
3094                 .it_flags = MUTABOR,
3095                 .it_act   = NULL,
3096                 .it_reint = REINT_UNLINK
3097         },
3098         [MDT_IT_TRUNC]    = {
3099                 .it_fmt   = NULL,
3100                 .it_flags = MUTABOR,
3101                 .it_act   = NULL
3102         },
3103         [MDT_IT_GETXATTR] = {
3104                 .it_fmt   = NULL,
3105                 .it_flags = 0,
3106                 .it_act   = NULL
3107         }
3108 };
3109
3110 int mdt_intent_lock_replace(struct mdt_thread_info *info,
3111                             struct ldlm_lock **lockp,
3112                             struct ldlm_lock *new_lock,
3113                             struct mdt_lock_handle *lh,
3114                             int flags)
3115 {
3116         struct ptlrpc_request  *req = mdt_info_req(info);
3117         struct ldlm_lock       *lock = *lockp;
3118
3119         /*
3120          * Get new lock only for cases when possible resent did not find any
3121          * lock.
3122          */
3123         if (new_lock == NULL)
3124                 new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
3125
3126         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY)) {
3127                 lh->mlh_reg_lh.cookie = 0;
3128                 RETURN(0);
3129         }
3130
3131         LASSERTF(new_lock != NULL,
3132                  "lockh "LPX64"\n", lh->mlh_reg_lh.cookie);
3133
3134         /*
3135          * If we've already given this lock to a client once, then we should
3136          * have no readers or writers.  Otherwise, we should have one reader
3137          * _or_ writer ref (which will be zeroed below) before returning the
3138          * lock to a client.
3139          */
3140         if (new_lock->l_export == req->rq_export) {
3141                 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
3142         } else {
3143                 LASSERT(new_lock->l_export == NULL);
3144                 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
3145         }
3146
3147         *lockp = new_lock;
3148
3149         if (new_lock->l_export == req->rq_export) {
3150                 /*
3151                  * Already gave this to the client, which means that we
3152                  * reconstructed a reply.
3153                  */
3154                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
3155                         MSG_RESENT);
3156                 lh->mlh_reg_lh.cookie = 0;
3157                 RETURN(ELDLM_LOCK_REPLACED);
3158         }
3159
3160         /*
3161          * Fixup the lock to be given to the client.
3162          */
3163         lock_res_and_lock(new_lock);
3164         /* Zero new_lock->l_readers and new_lock->l_writers without triggering
3165          * possible blocking AST. */
3166         while (new_lock->l_readers > 0) {
3167                 lu_ref_del(&new_lock->l_reference, "reader", new_lock);
3168                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3169                 new_lock->l_readers--;
3170         }
3171         while (new_lock->l_writers > 0) {
3172                 lu_ref_del(&new_lock->l_reference, "writer", new_lock);
3173                 lu_ref_del(&new_lock->l_reference, "user", new_lock);
3174                 new_lock->l_writers--;
3175         }
3176
3177         new_lock->l_export = class_export_lock_get(req->rq_export);
3178         new_lock->l_blocking_ast = lock->l_blocking_ast;
3179         new_lock->l_completion_ast = lock->l_completion_ast;
3180         new_lock->l_remote_handle = lock->l_remote_handle;
3181         new_lock->l_flags &= ~LDLM_FL_LOCAL;
3182
3183         unlock_res_and_lock(new_lock);
3184
3185         lustre_hash_add(new_lock->l_export->exp_lock_hash,
3186                         &new_lock->l_remote_handle,
3187                         &new_lock->l_exp_hash);
3188
3189         LDLM_LOCK_RELEASE(new_lock);
3190         lh->mlh_reg_lh.cookie = 0;
3191
3192         RETURN(ELDLM_LOCK_REPLACED);
3193 }
3194
3195 static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
3196                                     struct ldlm_lock *new_lock,
3197                                     struct ldlm_lock **old_lock,
3198                                     struct mdt_lock_handle *lh)
3199 {
3200         struct ptlrpc_request  *req = mdt_info_req(info);
3201         struct obd_export      *exp = req->rq_export;
3202         struct lustre_handle    remote_hdl;
3203         struct ldlm_request    *dlmreq;
3204         struct ldlm_lock       *lock;
3205
3206         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
3207                 return;
3208
3209         dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
3210         remote_hdl = dlmreq->lock_handle[0];
3211
3212         lock = lustre_hash_lookup(exp->exp_lock_hash, &remote_hdl);
3213         if (lock) {
3214                 if (lock != new_lock) {
3215                         lh->mlh_reg_lh.cookie = lock->l_handle.h_cookie;
3216                         lh->mlh_reg_mode = lock->l_granted_mode;
3217
3218                         LDLM_DEBUG(lock, "Restoring lock cookie");
3219                         DEBUG_REQ(D_DLMTRACE, req,
3220                                   "restoring lock cookie "LPX64,
3221                                   lh->mlh_reg_lh.cookie);
3222                         if (old_lock)
3223                                 *old_lock = LDLM_LOCK_GET(lock);
3224                         lh_put(exp->exp_lock_hash, &lock->l_exp_hash);
3225                         return;
3226                 }
3227
3228                 lh_put(exp->exp_lock_hash, &lock->l_exp_hash);
3229         }
3230
3231         /*
3232          * If the xid matches, then we know this is a resent request, and allow
3233          * it. (It's probably an OPEN, for which we don't send a lock.
3234          */
3235         if (req_xid_is_last(req))
3236                 return;
3237
3238         /*
3239          * This remote handle isn't enqueued, so we never received or processed
3240          * this request.  Clear MSG_RESENT, because it can be handled like any
3241          * normal request now.
3242          */
3243         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
3244
3245         DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
3246                   remote_hdl.cookie);
3247 }
3248
3249 static int mdt_intent_getattr(enum mdt_it_code opcode,
3250                               struct mdt_thread_info *info,
3251                               struct ldlm_lock **lockp,
3252                               int flags)
3253 {
3254         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3255         struct ldlm_lock       *new_lock = NULL;
3256         __u64                   child_bits;
3257         struct ldlm_reply      *ldlm_rep;
3258         struct ptlrpc_request  *req;
3259         struct mdt_body        *reqbody;
3260         struct mdt_body        *repbody;
3261         int                     rc;
3262         ENTRY;
3263
3264         reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
3265         LASSERT(reqbody);
3266
3267         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
3268         LASSERT(repbody);
3269
3270         info->mti_spec.sp_ck_split = !!(reqbody->valid & OBD_MD_FLCKSPLIT);
3271         info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
3272         repbody->eadatasize = 0;
3273         repbody->aclsize = 0;
3274
3275         switch (opcode) {
3276         case MDT_IT_LOOKUP:
3277                 child_bits = MDS_INODELOCK_LOOKUP;
3278                 break;
3279         case MDT_IT_GETATTR:
3280                 child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
3281                 break;
3282         default:
3283                 CERROR("Unhandled till now");
3284                 GOTO(out_shrink, rc = -EINVAL);
3285         }
3286
3287         rc = mdt_init_ucred(info, reqbody);
3288         if (rc)
3289                 GOTO(out_shrink, rc);
3290
3291         req = info->mti_pill->rc_req;
3292         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3293         mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
3294
3295         /* Get lock from request for possible resent case. */
3296         mdt_intent_fixup_resent(info, *lockp, &new_lock, lhc);
3297
3298         ldlm_rep->lock_policy_res2 =
3299                 mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
3300
3301         if (mdt_get_disposition(ldlm_rep, DISP_LOOKUP_NEG))
3302                 ldlm_rep->lock_policy_res2 = 0;
3303         if (!mdt_get_disposition(ldlm_rep, DISP_LOOKUP_POS) ||
3304             ldlm_rep->lock_policy_res2) {
3305                 lhc->mlh_reg_lh.cookie = 0ull;
3306                 GOTO(out_ucred, rc = ELDLM_LOCK_ABORTED);
3307         }
3308
3309         rc = mdt_intent_lock_replace(info, lockp, new_lock, lhc, flags);
3310         EXIT;
3311 out_ucred:
3312         mdt_exit_ucred(info);
3313 out_shrink:
3314         mdt_shrink_reply(info);
3315         return rc;
3316 }
3317
3318 static int mdt_intent_reint(enum mdt_it_code opcode,
3319                             struct mdt_thread_info *info,
3320                             struct ldlm_lock **lockp,
3321                             int flags)
3322 {
3323         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
3324         struct ldlm_reply      *rep = NULL;
3325         long                    opc;
3326         int                     rc;
3327
3328         static const struct req_format *intent_fmts[REINT_MAX] = {
3329                 [REINT_CREATE]  = &RQF_LDLM_INTENT_CREATE,
3330                 [REINT_OPEN]    = &RQF_LDLM_INTENT_OPEN
3331         };
3332
3333         ENTRY;
3334
3335         opc = mdt_reint_opcode(info, intent_fmts);
3336         if (opc < 0)
3337                 RETURN(opc);
3338
3339         if (mdt_it_flavor[opcode].it_reint != opc) {
3340                 CERROR("Reint code %ld doesn't match intent: %d\n",
3341                        opc, opcode);
3342                 RETURN(err_serious(-EPROTO));
3343         }
3344
3345         /* Get lock from request for possible resent case. */
3346         mdt_intent_fixup_resent(info, *lockp, NULL, lhc);
3347
3348         rc = mdt_reint_internal(info, lhc, opc);
3349
3350         /* Check whether the reply has been packed successfully. */
3351         if (mdt_info_req(info)->rq_repmsg != NULL)
3352                 rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
3353         if (rep == NULL)
3354                 RETURN(err_serious(-EFAULT));
3355
3356         /* MDC expects this in any case */
3357         if (rc != 0)
3358                 mdt_set_disposition(info, rep, DISP_LOOKUP_EXECD);
3359
3360         /* Cross-ref case, the lock should be returned to the client */
3361         if (rc == -EREMOTE) {
3362                 LASSERT(lustre_handle_is_used(&lhc->mlh_reg_lh));
3363                 rep->lock_policy_res2 = 0;
3364                 rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3365                 RETURN(rc);
3366         }
3367         rep->lock_policy_res2 = clear_serious(rc);
3368
3369         if (rc == -ENOTCONN || rc == -ENODEV ||
3370             rc == -EOVERFLOW) { /**< if VBR failure then return error */
3371                 /*
3372                  * If it is the disconnect error (ENODEV & ENOCONN), the error
3373                  * will be returned by rq_status, and client at ptlrpc layer
3374                  * will detect this, then disconnect, reconnect the import
3375                  * immediately, instead of impacting the following the rpc.
3376                  */
3377                 lhc->mlh_reg_lh.cookie = 0ull;
3378                 RETURN(rc);
3379         } else {
3380                 /*
3381                  * For other cases, the error will be returned by intent.
3382                  * and client will retrieve the result from intent.
3383                  */
3384                  /*
3385                   * FIXME: when open lock is finished, that should be
3386                   * checked here.
3387                   */
3388                 if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
3389                         rep->lock_policy_res2 = 0;
3390                         rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
3391                         RETURN(rc);
3392                 } else {
3393                         lhc->mlh_reg_lh.cookie = 0ull;
3394                         RETURN(ELDLM_LOCK_ABORTED);
3395                 }
3396         }
3397 }
3398
3399 static int mdt_intent_code(long itcode)
3400 {
3401         int rc;
3402
3403         switch(itcode) {
3404         case IT_OPEN:
3405                 rc = MDT_IT_OPEN;
3406                 break;
3407         case IT_OPEN|IT_CREAT:
3408                 rc = MDT_IT_OCREAT;
3409                 break;
3410         case IT_CREAT:
3411                 rc = MDT_IT_CREATE;
3412                 break;
3413         case IT_READDIR:
3414                 rc = MDT_IT_READDIR;
3415                 break;
3416         case IT_GETATTR:
3417                 rc = MDT_IT_GETATTR;
3418                 break;
3419         case IT_LOOKUP:
3420                 rc = MDT_IT_LOOKUP;
3421                 break;
3422         case IT_UNLINK:
3423                 rc = MDT_IT_UNLINK;
3424                 break;
3425         case IT_TRUNC:
3426                 rc = MDT_IT_TRUNC;
3427                 break;
3428         case IT_GETXATTR:
3429                 rc = MDT_IT_GETXATTR;
3430                 break;
3431         default:
3432                 CERROR("Unknown intent opcode: %ld\n", itcode);
3433                 rc = -EINVAL;
3434                 break;
3435         }
3436         return rc;
3437 }
3438
3439 static int mdt_intent_opc(long itopc, struct mdt_thread_info *info,
3440                           struct ldlm_lock **lockp, int flags)
3441 {
3442         struct req_capsule   *pill;
3443         struct mdt_it_flavor *flv;
3444         int opc;
3445         int rc;
3446         ENTRY;
3447
3448         opc = mdt_intent_code(itopc);
3449         if (opc < 0)
3450                 RETURN(-EINVAL);
3451
3452         pill = info->mti_pill;
3453         flv  = &mdt_it_flavor[opc];
3454
3455         if (flv->it_fmt != NULL)
3456                 req_capsule_extend(pill, flv->it_fmt);
3457
3458         rc = mdt_unpack_req_pack_rep(info, flv->it_flags);
3459         if (rc == 0) {
3460                 struct ptlrpc_request *req = mdt_info_req(info);
3461                 if (flv->it_flags & MUTABOR &&
3462                     req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
3463                         RETURN(-EROFS);
3464         }
3465         if (rc == 0 && flv->it_act != NULL) {
3466                 /* execute policy */
3467                 rc = flv->it_act(opc, info, lockp, flags);
3468         } else {
3469                 rc = -EOPNOTSUPP;
3470         }
3471         RETURN(rc);
3472 }
3473
3474 static int mdt_intent_policy(struct ldlm_namespace *ns,
3475                              struct ldlm_lock **lockp, void *req_cookie,
3476                              ldlm_mode_t mode, int flags, void *data)
3477 {
3478         struct mdt_thread_info *info;
3479         struct ptlrpc_request  *req  =  req_cookie;
3480         struct ldlm_intent     *it;
3481         struct req_capsule     *pill;
3482         int rc;
3483
3484         ENTRY;
3485
3486         LASSERT(req != NULL);
3487
3488         info = lu_context_key_get(&req->rq_svc_thread->t_env->le_ctx,
3489                                   &mdt_thread_key);
3490         LASSERT(info != NULL);
3491         pill = info->mti_pill;
3492         LASSERT(pill->rc_req == req);
3493
3494         if (req->rq_reqmsg->lm_bufcount > DLM_INTENT_IT_OFF) {
3495                 req_capsule_extend(pill, &RQF_LDLM_INTENT);
3496                 it = req_capsule_client_get(pill, &RMF_LDLM_INTENT);
3497                 if (it != NULL) {
3498                         const struct ldlm_request *dlmreq;
3499                         __u64 req_bits;
3500
3501                         rc = mdt_intent_opc(it->opc, info, lockp, flags);
3502                         if (rc == 0)
3503                                 rc = ELDLM_OK;
3504
3505                         /*
3506                          * Lock without inodebits makes no sense and will oops
3507                          * later in ldlm. Let's check it now to see if we have
3508                          * wrong lock from client or bits get corrupted
3509                          * somewhere in mdt_intent_opc().
3510                          */
3511                         dlmreq = info->mti_dlm_req;
3512                         req_bits = dlmreq->lock_desc.l_policy_data.l_inodebits.bits;
3513                         LASSERT(req_bits != 0);
3514
3515                 } else
3516                         rc = err_serious(-EFAULT);
3517         } else {
3518                 /* No intent was provided */
3519                 LASSERT(pill->rc_fmt == &RQF_LDLM_ENQUEUE);
3520                 rc = req_capsule_server_pack(pill);
3521                 if (rc)
3522                         rc = err_serious(rc);
3523         }
3524         RETURN(rc);
3525 }
3526
3527 /*
3528  * Seq wrappers
3529  */
3530 static void mdt_seq_adjust(const struct lu_env *env,
3531                           struct mdt_device *m, int lost)
3532 {
3533         struct md_site *ms = mdt_md_site(m);
3534         struct lu_seq_range out;
3535         ENTRY;
3536
3537         LASSERT(ms && ms->ms_server_seq);
3538         LASSERT(lost >= 0);
3539         /* get extra seq from seq_server, moving it's range up */
3540         while (lost-- > 0) {
3541                 seq_server_alloc_meta(ms->ms_server_seq, NULL, &out, env);
3542         }
3543         EXIT;
3544 }
3545
3546 static int mdt_seq_fini(const struct lu_env *env,
3547                         struct mdt_device *m)
3548 {
3549         struct md_site *ms = mdt_md_site(m);
3550         ENTRY;
3551
3552         if (ms != NULL) {
3553                 if (ms->ms_server_seq) {
3554                         seq_server_fini(ms->ms_server_seq, env);
3555                         OBD_FREE_PTR(ms->ms_server_seq);
3556                         ms->ms_server_seq = NULL;
3557         }
3558
3559                 if (ms->ms_control_seq) {
3560                         seq_server_fini(ms->ms_control_seq, env);
3561                         OBD_FREE_PTR(ms->ms_control_seq);
3562                         ms->ms_control_seq = NULL;
3563         }
3564
3565                 if (ms->ms_client_seq) {
3566                         seq_client_fini(ms->ms_client_seq);
3567                         OBD_FREE_PTR(ms->ms_client_seq);
3568                         ms->ms_client_seq = NULL;
3569                 }
3570         }
3571
3572         RETURN(0);
3573 }
3574
3575 static int mdt_seq_init(const struct lu_env *env,
3576                         const char *uuid,
3577                         struct mdt_device *m)
3578 {
3579         struct md_site *ms;
3580         char *prefix;
3581         int rc;
3582         ENTRY;
3583
3584         ms = mdt_md_site(m);
3585
3586         /*
3587          * This is sequence-controller node. Init seq-controller server on local
3588          * MDT.
3589          */
3590         if (ms->ms_node_id == 0) {
3591                 LASSERT(ms->ms_control_seq == NULL);
3592
3593                 OBD_ALLOC_PTR(ms->ms_control_seq);
3594                 if (ms->ms_control_seq == NULL)
3595                         RETURN(-ENOMEM);
3596
3597                 rc = seq_server_init(ms->ms_control_seq,
3598                                      m->mdt_bottom, uuid,
3599                                      LUSTRE_SEQ_CONTROLLER,
3600                                      ms,
3601                                      env);
3602
3603                 if (rc)
3604                         GOTO(out_seq_fini, rc);
3605
3606                 OBD_ALLOC_PTR(ms->ms_client_seq);
3607                 if (ms->ms_client_seq == NULL)
3608                         GOTO(out_seq_fini, rc = -ENOMEM);
3609
3610                 OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
3611                 if (prefix == NULL) {
3612                         OBD_FREE_PTR(ms->ms_client_seq);
3613                         GOTO(out_seq_fini, rc = -ENOMEM);
3614                 }
3615
3616                 snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
3617                          uuid);
3618
3619                 /*
3620                  * Init seq-controller client after seq-controller server is
3621                  * ready. Pass ms->ms_control_seq to it for direct talking.
3622                  */
3623                 rc = seq_client_init(ms->ms_client_seq, NULL,
3624                                      LUSTRE_SEQ_METADATA, prefix,
3625                                      ms->ms_control_seq);
3626                 OBD_FREE(prefix, MAX_OBD_NAME + 5);
3627
3628                 if (rc)
3629                         GOTO(out_seq_fini, rc);
3630         }
3631
3632         /* Init seq-server on local MDT */
3633         LASSERT(ms->ms_server_seq == NULL);
3634
3635         OBD_ALLOC_PTR(ms->ms_server_seq);
3636         if (ms->ms_server_seq == NULL)
3637                 GOTO(out_seq_fini, rc = -ENOMEM);
3638
3639         rc = seq_server_init(ms->ms_server_seq,
3640                              m->mdt_bottom, uuid,
3641                              LUSTRE_SEQ_SERVER,
3642                              ms,
3643                              env);
3644         if (rc)
3645                 GOTO(out_seq_fini, rc = -ENOMEM);
3646
3647         /* Assign seq-controller client to local seq-server. */
3648         if (ms->ms_node_id == 0) {
3649                 LASSERT(ms->ms_client_seq != NULL);
3650
3651                 rc = seq_server_set_cli(ms->ms_server_seq,
3652                                         ms->ms_client_seq,
3653                                         env);
3654         }
3655
3656         EXIT;
3657 out_seq_fini:
3658         if (rc)
3659                 mdt_seq_fini(env, m);
3660
3661         return rc;
3662 }
3663 /*
3664  * Init client sequence manager which is used by local MDS to talk to sequence
3665  * controller on remote node.
3666  */
3667 static int mdt_seq_init_cli(const struct lu_env *env,
3668                             struct mdt_device *m,
3669                             struct lustre_cfg *cfg)
3670 {
3671         struct md_site    *ms = mdt_md_site(m);
3672         struct obd_device *mdc;
3673         struct obd_uuid   *uuidp, *mdcuuidp;
3674         char              *uuid_str, *mdc_uuid_str;
3675         int                rc;
3676         int                index;
3677         struct mdt_thread_info *info;
3678         char *p, *index_string = lustre_cfg_string(cfg, 2);
3679         ENTRY;
3680
3681         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
3682         uuidp = &info->mti_u.uuid[0];
3683         mdcuuidp = &info->mti_u.uuid[1];
3684
3685         LASSERT(index_string);
3686
3687         index = simple_strtol(index_string, &p, 10);
3688         if (*p) {
3689                 CERROR("Invalid index in lustre_cgf, offset 2\n");
3690                 RETURN(-EINVAL);
3691         }
3692
3693         /* check if this is adding the first MDC and controller is not yet
3694          * initialized. */
3695         if (index != 0 || ms->ms_client_seq)
3696                 RETURN(0);
3697
3698         uuid_str = lustre_cfg_string(cfg, 1);
3699         mdc_uuid_str = lustre_cfg_string(cfg, 4);
3700         obd_str2uuid(uuidp, uuid_str);
3701         obd_str2uuid(mdcuuidp, mdc_uuid_str);
3702
3703         mdc = class_find_client_obd(uuidp, LUSTRE_MDC_NAME, mdcuuidp);
3704         if (!mdc) {
3705                 CERROR("can't find controller MDC by uuid %s\n",
3706                        uuid_str);
3707                 rc = -ENOENT;
3708         } else if (!mdc->obd_set_up) {
3709                 CERROR("target %s not set up\n", mdc->obd_name);
3710                 rc = -EINVAL;
3711         } else {
3712                 LASSERT(ms->ms_control_exp);
3713                 OBD_ALLOC_PTR(ms->ms_client_seq);
3714                 if (ms->ms_client_seq != NULL) {
3715                         char *prefix;
3716
3717                         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
3718                         if (!prefix)
3719                                 RETURN(-ENOMEM);
3720
3721                         snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s",
3722                                  mdc->obd_name);
3723
3724                         rc = seq_client_init(ms->ms_client_seq,
3725                                              ms->ms_control_exp,
3726                                              LUSTRE_SEQ_METADATA,
3727                                              prefix, NULL);
3728                         OBD_FREE(prefix, MAX_OBD_NAME + 5);
3729                 } else
3730                         rc = -ENOMEM;
3731
3732                 if (rc)
3733                         RETURN(rc);
3734
3735                 LASSERT(ms->ms_server_seq != NULL);
3736                 rc = seq_server_set_cli(ms->ms_server_seq, ms->ms_client_seq,
3737                                         env);
3738         }
3739
3740         RETURN(rc);
3741 }
3742
3743 static void mdt_seq_fini_cli(struct mdt_device *m)
3744 {
3745         struct md_site *ms;
3746
3747         ENTRY;
3748
3749         ms = mdt_md_site(m);
3750
3751         if (ms != NULL) {
3752                 if (ms->ms_server_seq)
3753                         seq_server_set_cli(ms->ms_server_seq,
3754                                    NULL, NULL);
3755
3756                 if (ms->ms_control_exp) {
3757                         class_export_put(ms->ms_control_exp);
3758                         ms->ms_control_exp = NULL;
3759                 }
3760         }
3761         EXIT;
3762 }
3763
3764 /*
3765  * FLD wrappers
3766  */
3767 static int mdt_fld_fini(const struct lu_env *env,
3768                         struct mdt_device *m)
3769 {
3770         struct md_site *ms = mdt_md_site(m);
3771         ENTRY;
3772
3773         if (ms && ms->ms_server_fld) {
3774                 fld_server_fini(ms->ms_server_fld, env);
3775                 OBD_FREE_PTR(ms->ms_server_fld);
3776                 ms->ms_server_fld = NULL;
3777         }
3778
3779         RETURN(0);
3780 }
3781
3782 static int mdt_fld_init(const struct lu_env *env,
3783                         const char *uuid,
3784                         struct mdt_device *m)
3785 {
3786         struct md_site *ms;
3787         int rc;
3788         ENTRY;
3789
3790         ms = mdt_md_site(m);
3791
3792         OBD_ALLOC_PTR(ms->ms_server_fld);
3793         if (ms->ms_server_fld == NULL)
3794                 RETURN(rc = -ENOMEM);
3795
3796         rc = fld_server_init(ms->ms_server_fld,
3797                              m->mdt_bottom, uuid,
3798                              env, ms->ms_node_id);
3799         if (rc) {
3800                 OBD_FREE_PTR(ms->ms_server_fld);
3801                 ms->ms_server_fld = NULL;
3802                 RETURN(rc);
3803         }
3804
3805         RETURN(0);
3806 }
3807
3808 /* device init/fini methods */
3809 static void mdt_stop_ptlrpc_service(struct mdt_device *m)
3810 {
3811         ENTRY;
3812         if (m->mdt_regular_service != NULL) {
3813                 ptlrpc_unregister_service(m->mdt_regular_service);
3814                 m->mdt_regular_service = NULL;
3815         }
3816         if (m->mdt_readpage_service != NULL) {
3817                 ptlrpc_unregister_service(m->mdt_readpage_service);
3818                 m->mdt_readpage_service = NULL;
3819         }
3820         if (m->mdt_xmds_service != NULL) {
3821                 ptlrpc_unregister_service(m->mdt_xmds_service);
3822                 m->mdt_xmds_service = NULL;
3823         }
3824         if (m->mdt_setattr_service != NULL) {
3825                 ptlrpc_unregister_service(m->mdt_setattr_service);
3826                 m->mdt_setattr_service = NULL;
3827         }
3828         if (m->mdt_mdsc_service != NULL) {
3829                 ptlrpc_unregister_service(m->mdt_mdsc_service);
3830                 m->mdt_mdsc_service = NULL;
3831         }
3832         if (m->mdt_mdss_service != NULL) {
3833                 ptlrpc_unregister_service(m->mdt_mdss_service);
3834                 m->mdt_mdss_service = NULL;
3835         }
3836         if (m->mdt_dtss_service != NULL) {
3837                 ptlrpc_unregister_service(m->mdt_dtss_service);
3838                 m->mdt_dtss_service = NULL;
3839         }
3840         if (m->mdt_fld_service != NULL) {
3841                 ptlrpc_unregister_service(m->mdt_fld_service);
3842                 m->mdt_fld_service = NULL;
3843         }
3844         EXIT;
3845 }
3846
3847 static int mdt_start_ptlrpc_service(struct mdt_device *m)
3848 {
3849         int rc;
3850         static struct ptlrpc_service_conf conf;
3851         cfs_proc_dir_entry_t *procfs_entry;
3852         ENTRY;
3853
3854         procfs_entry = m->mdt_md_dev.md_lu_dev.ld_obd->obd_proc_entry;
3855
3856         conf = (typeof(conf)) {
3857                 .psc_nbufs           = MDS_NBUFS,
3858                 .psc_bufsize         = MDS_BUFSIZE,
3859                 .psc_max_req_size    = MDS_MAXREQSIZE,
3860                 .psc_max_reply_size  = MDS_MAXREPSIZE,
3861                 .psc_req_portal      = MDS_REQUEST_PORTAL,
3862                 .psc_rep_portal      = MDC_REPLY_PORTAL,
3863                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
3864                 /*
3865                  * We'd like to have a mechanism to set this on a per-device
3866                  * basis, but alas...
3867                  */
3868                 .psc_min_threads    = min(max(mdt_num_threads, MDT_MIN_THREADS),
3869                                           MDT_MAX_THREADS),
3870                 .psc_max_threads     = MDT_MAX_THREADS,
3871                 .psc_ctx_tags        = LCT_MD_THREAD
3872         };
3873
3874         m->mdt_ldlm_client = &m->mdt_md_dev.md_lu_dev.ld_obd->obd_ldlm_client;
3875         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
3876                            "mdt_ldlm_client", m->mdt_ldlm_client);
3877
3878         m->mdt_regular_service =
3879                 ptlrpc_init_svc_conf(&conf, mdt_regular_handle, LUSTRE_MDT_NAME,
3880                                      procfs_entry, target_print_req,
3881                                      LUSTRE_MDT_NAME);
3882         if (m->mdt_regular_service == NULL)
3883                 RETURN(-ENOMEM);
3884
3885         rc = ptlrpc_start_threads(NULL, m->mdt_regular_service);
3886         if (rc)
3887                 GOTO(err_mdt_svc, rc);
3888
3889         /*
3890          * readpage service configuration. Parameters have to be adjusted,
3891          * ideally.
3892          */
3893         conf = (typeof(conf)) {
3894                 .psc_nbufs           = MDS_NBUFS,
3895                 .psc_bufsize         = MDS_BUFSIZE,
3896                 .psc_max_req_size    = MDS_MAXREQSIZE,
3897                 .psc_max_reply_size  = MDS_MAXREPSIZE,
3898                 .psc_req_portal      = MDS_READPAGE_PORTAL,
3899                 .psc_rep_portal      = MDC_REPLY_PORTAL,
3900                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
3901                 .psc_min_threads    = min(max(mdt_num_threads, MDT_MIN_THREADS),
3902                                           MDT_MAX_THREADS),
3903                 .psc_max_threads     = MDT_MAX_THREADS,
3904                 .psc_ctx_tags        = LCT_MD_THREAD
3905         };
3906         m->mdt_readpage_service =
3907                 ptlrpc_init_svc_conf(&conf, mdt_readpage_handle,
3908                                      LUSTRE_MDT_NAME "_readpage",
3909                                      procfs_entry, target_print_req,"mdt_rdpg");
3910
3911         if (m->mdt_readpage_service == NULL) {
3912                 CERROR("failed to start readpage service\n");
3913                 GOTO(err_mdt_svc, rc = -ENOMEM);
3914         }
3915
3916         rc = ptlrpc_start_threads(NULL, m->mdt_readpage_service);
3917
3918         /*
3919          * setattr service configuration.
3920          */
3921         conf = (typeof(conf)) {
3922                 .psc_nbufs           = MDS_NBUFS,
3923                 .psc_bufsize         = MDS_BUFSIZE,
3924                 .psc_max_req_size    = MDS_MAXREQSIZE,
3925                 .psc_max_reply_size  = MDS_MAXREPSIZE,
3926                 .psc_req_portal      = MDS_SETATTR_PORTAL,
3927                 .psc_rep_portal      = MDC_REPLY_PORTAL,
3928                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
3929                 .psc_min_threads   = min(max(mdt_num_threads, MDT_MIN_THREADS),
3930                                          MDT_MAX_THREADS),
3931                 .psc_max_threads     = MDT_MAX_THREADS,
3932                 .psc_ctx_tags        = LCT_MD_THREAD
3933         };
3934
3935         m->mdt_setattr_service =
3936                 ptlrpc_init_svc_conf(&conf, mdt_regular_handle,
3937                                      LUSTRE_MDT_NAME "_setattr",
3938                                      procfs_entry, target_print_req,"mdt_attr");
3939
3940         if (!m->mdt_setattr_service) {
3941                 CERROR("failed to start setattr service\n");
3942                 GOTO(err_mdt_svc, rc = -ENOMEM);
3943         }
3944
3945         rc = ptlrpc_start_threads(NULL, m->mdt_setattr_service);
3946         if (rc)
3947                 GOTO(err_mdt_svc, rc);
3948
3949         /*
3950          * sequence controller service configuration
3951          */
3952         conf = (typeof(conf)) {
3953                 .psc_nbufs           = MDS_NBUFS,
3954                 .psc_bufsize         = MDS_BUFSIZE,
3955                 .psc_max_req_size    = SEQ_MAXREQSIZE,
3956                 .psc_max_reply_size  = SEQ_MAXREPSIZE,
3957                 .psc_req_portal      = SEQ_CONTROLLER_PORTAL,
3958                 .psc_rep_portal      = MDC_REPLY_PORTAL,
3959                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
3960                 .psc_min_threads     = SEQ_NUM_THREADS,
3961                 .psc_max_threads     = SEQ_NUM_THREADS,
3962                 .psc_ctx_tags        = LCT_MD_THREAD|LCT_DT_THREAD
3963         };
3964
3965         m->mdt_mdsc_service =
3966                 ptlrpc_init_svc_conf(&conf, mdt_mdsc_handle,
3967                                      LUSTRE_MDT_NAME"_mdsc",
3968                                      procfs_entry, target_print_req,"mdt_mdsc");
3969         if (!m->mdt_mdsc_service) {
3970                 CERROR("failed to start seq controller service\n");
3971                 GOTO(err_mdt_svc, rc = -ENOMEM);
3972         }
3973
3974         rc = ptlrpc_start_threads(NULL, m->mdt_mdsc_service);
3975         if (rc)
3976                 GOTO(err_mdt_svc, rc);
3977
3978         /*
3979          * metadata sequence server service configuration
3980          */
3981         conf = (typeof(conf)) {
3982                 .psc_nbufs           = MDS_NBUFS,
3983                 .psc_bufsize         = MDS_BUFSIZE,
3984                 .psc_max_req_size    = SEQ_MAXREQSIZE,
3985                 .psc_max_reply_size  = SEQ_MAXREPSIZE,
3986                 .psc_req_portal      = SEQ_METADATA_PORTAL,
3987                 .psc_rep_portal      = MDC_REPLY_PORTAL,
3988                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
3989                 .psc_min_threads     = SEQ_NUM_THREADS,
3990                 .psc_max_threads     = SEQ_NUM_THREADS,
3991                 .psc_ctx_tags        = LCT_MD_THREAD|LCT_DT_THREAD
3992         };
3993
3994         m->mdt_mdss_service =
3995                 ptlrpc_init_svc_conf(&conf, mdt_mdss_handle,
3996                                      LUSTRE_MDT_NAME"_mdss",
3997                                      procfs_entry, target_print_req,"mdt_mdss");
3998         if (!m->mdt_mdss_service) {
3999                 CERROR("failed to start metadata seq server service\n");
4000                 GOTO(err_mdt_svc, rc = -ENOMEM);
4001         }
4002
4003         rc = ptlrpc_start_threads(NULL, m->mdt_mdss_service);
4004         if (rc)
4005                 GOTO(err_mdt_svc, rc);
4006
4007
4008         /*
4009          * Data sequence server service configuration. We want to have really
4010          * cluster-wide sequences space. This is why we start only one sequence
4011          * controller which manages space.
4012          */
4013         conf = (typeof(conf)) {
4014                 .psc_nbufs           = MDS_NBUFS,
4015                 .psc_bufsize         = MDS_BUFSIZE,
4016                 .psc_max_req_size    = SEQ_MAXREQSIZE,
4017                 .psc_max_reply_size  = SEQ_MAXREPSIZE,
4018                 .psc_req_portal      = SEQ_DATA_PORTAL,
4019                 .psc_rep_portal      = OSC_REPLY_PORTAL,
4020                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4021                 .psc_min_threads     = SEQ_NUM_THREADS,
4022                 .psc_max_threads     = SEQ_NUM_THREADS,
4023                 .psc_ctx_tags        = LCT_MD_THREAD|LCT_DT_THREAD
4024         };
4025
4026         m->mdt_dtss_service =
4027                 ptlrpc_init_svc_conf(&conf, mdt_dtss_handle,
4028                                      LUSTRE_MDT_NAME"_dtss",
4029                                      procfs_entry, target_print_req,"mdt_dtss");
4030         if (!m->mdt_dtss_service) {
4031                 CERROR("failed to start data seq server service\n");
4032                 GOTO(err_mdt_svc, rc = -ENOMEM);
4033         }
4034
4035         rc = ptlrpc_start_threads(NULL, m->mdt_dtss_service);
4036         if (rc)
4037                 GOTO(err_mdt_svc, rc);
4038
4039         /* FLD service start */
4040         conf = (typeof(conf)) {
4041                 .psc_nbufs           = MDS_NBUFS,
4042                 .psc_bufsize         = MDS_BUFSIZE,
4043                 .psc_max_req_size    = FLD_MAXREQSIZE,
4044                 .psc_max_reply_size  = FLD_MAXREPSIZE,
4045                 .psc_req_portal      = FLD_REQUEST_PORTAL,
4046                 .psc_rep_portal      = MDC_REPLY_PORTAL,
4047                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4048                 .psc_min_threads     = FLD_NUM_THREADS,
4049                 .psc_max_threads     = FLD_NUM_THREADS,
4050                 .psc_ctx_tags        = LCT_DT_THREAD|LCT_MD_THREAD
4051         };
4052
4053         m->mdt_fld_service =
4054                 ptlrpc_init_svc_conf(&conf, mdt_fld_handle,
4055                                      LUSTRE_MDT_NAME"_fld",
4056                                      procfs_entry, target_print_req, "mdt_fld");
4057         if (!m->mdt_fld_service) {
4058                 CERROR("failed to start fld service\n");
4059                 GOTO(err_mdt_svc, rc = -ENOMEM);
4060         }
4061
4062         rc = ptlrpc_start_threads(NULL, m->mdt_fld_service);
4063         if (rc)
4064                 GOTO(err_mdt_svc, rc);
4065
4066         /*
4067          * mds-mds service configuration. Separate portal is used to allow
4068          * mds-mds requests be not blocked during recovery.
4069          */
4070         conf = (typeof(conf)) {
4071                 .psc_nbufs           = MDS_NBUFS,
4072                 .psc_bufsize         = MDS_BUFSIZE,
4073                 .psc_max_req_size    = MDS_MAXREQSIZE,
4074                 .psc_max_reply_size  = MDS_MAXREPSIZE,
4075                 .psc_req_portal      = MDS_MDS_PORTAL,
4076                 .psc_rep_portal      = MDC_REPLY_PORTAL,
4077                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
4078                 .psc_min_threads    = min(max(mdt_num_threads, MDT_MIN_THREADS),
4079                                           MDT_MAX_THREADS),
4080                 .psc_max_threads     = MDT_MAX_THREADS,
4081                 .psc_ctx_tags        = LCT_MD_THREAD
4082         };
4083         m->mdt_xmds_service =
4084                 ptlrpc_init_svc_conf(&conf, mdt_xmds_handle,
4085                                      LUSTRE_MDT_NAME "_mds",
4086                                      procfs_entry, target_print_req,"mdt_xmds");
4087
4088         if (m->mdt_xmds_service == NULL) {
4089                 CERROR("failed to start readpage service\n");
4090                 GOTO(err_mdt_svc, rc = -ENOMEM);
4091         }
4092
4093         rc = ptlrpc_start_threads(NULL, m->mdt_xmds_service);
4094         if (rc)
4095                 GOTO(err_mdt_svc, rc);
4096
4097         EXIT;
4098 err_mdt_svc:
4099         if (rc)
4100                 mdt_stop_ptlrpc_service(m);
4101
4102         return rc;
4103 }
4104
4105 static void mdt_stack_fini(const struct lu_env *env,
4106                            struct mdt_device *m, struct lu_device *top)
4107 {
4108         struct obd_device       *obd = mdt2obd_dev(m);
4109         struct lustre_cfg_bufs  *bufs;
4110         struct lustre_cfg       *lcfg;
4111         struct mdt_thread_info  *info;
4112         char flags[3]="";
4113         ENTRY;
4114
4115         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4116         LASSERT(info != NULL);
4117
4118         bufs = &info->mti_u.bufs;
4119         /* process cleanup, pass mdt obd name to get obd umount flags */
4120         lustre_cfg_bufs_reset(bufs, obd->obd_name);
4121         if (obd->obd_force)
4122                 strcat(flags, "F");
4123         if (obd->obd_fail)
4124                 strcat(flags, "A");
4125         lustre_cfg_bufs_set_string(bufs, 1, flags);
4126         lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
4127         if (!lcfg) {
4128                 CERROR("Cannot alloc lcfg!\n");
4129                 return;
4130         }
4131
4132         LASSERT(top);
4133         top->ld_ops->ldo_process_config(env, top, lcfg);
4134         lustre_cfg_free(lcfg);
4135
4136         lu_stack_fini(env, top);
4137         m->mdt_child = NULL;
4138         m->mdt_bottom = NULL;
4139 }
4140
4141 static struct lu_device *mdt_layer_setup(struct lu_env *env,
4142                                          const char *typename,
4143                                          struct lu_device *child,
4144                                          struct lustre_cfg *cfg)
4145 {
4146         const char            *dev = lustre_cfg_string(cfg, 0);
4147         struct obd_type       *type;
4148         struct lu_device_type *ldt;
4149         struct lu_device      *d;
4150         int rc;
4151         ENTRY;
4152
4153         /* find the type */
4154         type = class_get_type(typename);
4155         if (!type) {
4156                 CERROR("Unknown type: '%s'\n", typename);
4157                 GOTO(out, rc = -ENODEV);
4158         }
4159
4160         rc = lu_env_refill((struct lu_env *)env);
4161         if (rc != 0) {
4162                 CERROR("Failure to refill session: '%d'\n", rc);
4163                 GOTO(out_type, rc);
4164         }
4165
4166         ldt = type->typ_lu;
4167         if (ldt == NULL) {
4168                 CERROR("type: '%s'\n", typename);
4169                 GOTO(out_type, rc = -EINVAL);
4170         }
4171
4172         ldt->ldt_obd_type = type;
4173         d = ldt->ldt_ops->ldto_device_alloc(env, ldt, cfg);
4174         if (IS_ERR(d)) {
4175                 CERROR("Cannot allocate device: '%s'\n", typename);
4176                 GOTO(out_type, rc = -ENODEV);
4177         }
4178
4179         LASSERT(child->ld_site);
4180         d->ld_site = child->ld_site;
4181
4182         type->typ_refcnt++;
4183         rc = ldt->ldt_ops->ldto_device_init(env, d, dev, child);
4184         if (rc) {
4185                 CERROR("can't init device '%s', rc %d\n", typename, rc);
4186                 GOTO(out_alloc, rc);
4187         }
4188         lu_device_get(d);
4189         lu_ref_add(&d->ld_reference, "lu-stack", &lu_site_init);
4190
4191         RETURN(d);
4192
4193 out_alloc:
4194         ldt->ldt_ops->ldto_device_free(env, d);
4195         type->typ_refcnt--;
4196 out_type:
4197         class_put_type(type);
4198 out:
4199         return ERR_PTR(rc);
4200 }
4201
4202 static int mdt_stack_init(struct lu_env *env,
4203                           struct mdt_device *m,
4204                           struct lustre_cfg *cfg,
4205                           struct lustre_mount_info  *lmi)
4206 {
4207         struct lu_device  *d = &m->mdt_md_dev.md_lu_dev;
4208         struct lu_device  *tmp;
4209         struct md_device  *md;
4210         struct lu_device  *child_lu_dev;
4211         int rc;
4212         ENTRY;
4213
4214         /* init the stack */
4215         tmp = mdt_layer_setup(env, LUSTRE_OSD_NAME, d, cfg);
4216         if (IS_ERR(tmp)) {
4217                 RETURN(PTR_ERR(tmp));
4218         }
4219         m->mdt_bottom = lu2dt_dev(tmp);
4220         d = tmp;
4221         tmp = mdt_layer_setup(env, LUSTRE_MDD_NAME, d, cfg);
4222         if (IS_ERR(tmp)) {
4223                 GOTO(out, rc = PTR_ERR(tmp));
4224         }
4225         d = tmp;
4226         md = lu2md_dev(d);
4227
4228         tmp = mdt_layer_setup(env, LUSTRE_CMM_NAME, d, cfg);
4229         if (IS_ERR(tmp)) {
4230                 GOTO(out, rc = PTR_ERR(tmp));
4231         }
4232         d = tmp;
4233         /*set mdd upcall device*/
4234         md_upcall_dev_set(md, lu2md_dev(d));
4235
4236         md = lu2md_dev(d);
4237         /*set cmm upcall device*/
4238         md_upcall_dev_set(md, &m->mdt_md_dev);
4239
4240         m->mdt_child = lu2md_dev(d);
4241
4242         /* process setup config */
4243         tmp = &m->mdt_md_dev.md_lu_dev;
4244         rc = tmp->ld_ops->ldo_process_config(env, tmp, cfg);
4245         if (rc)
4246                 GOTO(out, rc);
4247
4248         /* initialize local objects */
4249         child_lu_dev = &m->mdt_child->md_lu_dev;
4250
4251         rc = child_lu_dev->ld_ops->ldo_prepare(env,
4252                                                &m->mdt_md_dev.md_lu_dev,
4253                                                child_lu_dev);
4254 out:
4255         /* fini from last known good lu_device */
4256         if (rc)
4257                 mdt_stack_fini(env, m, d);
4258
4259         return rc;
4260 }
4261
4262 /**
4263  * setup CONFIG_ORIG context, used to access local config log.
4264  * this may need to be rewrite as part of llog rewrite for lu-api.
4265  */
4266 static int mdt_obd_llog_setup(struct obd_device *obd,
4267                               struct lustre_sb_info *lsi)
4268 {
4269         int     rc;
4270
4271         LASSERT(obd->obd_fsops == NULL);
4272
4273         obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
4274         if (IS_ERR(obd->obd_fsops))
4275                 return PTR_ERR(obd->obd_fsops);
4276
4277         rc = fsfilt_setup(obd, lsi->lsi_srv_mnt->mnt_sb);
4278         if (rc) {
4279                 fsfilt_put_ops(obd->obd_fsops);
4280                 return rc;
4281         }
4282
4283         OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
4284         obd->obd_lvfs_ctxt.pwdmnt = lsi->lsi_srv_mnt;
4285         obd->obd_lvfs_ctxt.pwd = lsi->lsi_srv_mnt->mnt_root;
4286         obd->obd_lvfs_ctxt.fs = get_ds();
4287
4288         rc = llog_setup(obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT, obd,
4289                         0, NULL, &llog_lvfs_ops);
4290         if (rc) {
4291                 CERROR("llog_setup() failed: %d\n", rc);
4292                 fsfilt_put_ops(obd->obd_fsops);
4293         }
4294
4295         return rc;
4296 }
4297
4298 static void mdt_obd_llog_cleanup(struct obd_device *obd)
4299 {
4300         struct llog_ctxt *ctxt;
4301
4302         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
4303         if (ctxt)
4304                 llog_cleanup(ctxt);
4305
4306         if (obd->obd_fsops) {
4307                 fsfilt_put_ops(obd->obd_fsops);
4308                 obd->obd_fsops = NULL;
4309         }
4310 }
4311
4312 static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
4313 {
4314         struct md_device  *next = m->mdt_child;
4315         struct lu_device  *d    = &m->mdt_md_dev.md_lu_dev;
4316         struct lu_site    *ls   = d->ld_site;
4317         struct obd_device *obd = mdt2obd_dev(m);
4318         ENTRY;
4319
4320         target_recovery_fini(obd);
4321
4322         ping_evictor_stop();
4323
4324         mdt_stop_ptlrpc_service(m);
4325         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
4326         mdt_obd_llog_cleanup(obd);
4327         obd_exports_barrier(obd);
4328         obd_zombie_barrier();
4329 #ifdef HAVE_QUOTA_SUPPORT
4330         next->md_ops->mdo_quota.mqo_cleanup(env, next);
4331 #endif
4332         lut_fini(env, &m->mdt_lut);
4333         mdt_fs_cleanup(env, m);
4334         upcall_cache_cleanup(m->mdt_identity_cache);
4335         m->mdt_identity_cache = NULL;
4336
4337         if (m->mdt_namespace != NULL) {
4338                 ldlm_namespace_free(m->mdt_namespace, NULL,
4339                                     d->ld_obd->obd_force);
4340                 d->ld_obd->obd_namespace = m->mdt_namespace = NULL;
4341         }
4342
4343         cfs_free_nidlist(&m->mdt_nosquash_nids);
4344         if (m->mdt_nosquash_str) {
4345                 OBD_FREE(m->mdt_nosquash_str, m->mdt_nosquash_strlen);
4346                 m->mdt_nosquash_str = NULL;
4347                 m->mdt_nosquash_strlen = 0;
4348         }
4349
4350         mdt_seq_fini(env, m);
4351         mdt_seq_fini_cli(m);
4352         mdt_fld_fini(env, m);
4353         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4354
4355         next->md_ops->mdo_init_capa_ctxt(env, next, 0, 0, 0, NULL);
4356         cfs_timer_disarm(&m->mdt_ck_timer);
4357         mdt_ck_thread_stop(m);
4358
4359         /*
4360          * Finish the stack
4361          */
4362         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
4363
4364         mdt_procfs_fini(m);
4365         if (obd->obd_proc_exports_entry) {
4366                 lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
4367                 obd->obd_proc_exports_entry = NULL;
4368         }
4369         lprocfs_free_per_client_stats(obd);
4370         lprocfs_free_obd_stats(obd);
4371         ptlrpc_lprocfs_unregister_obd(obd);
4372         lprocfs_obd_cleanup(obd);
4373
4374         if (ls) {
4375                 struct md_site *mite;
4376
4377                 lu_site_fini(ls);
4378                 mite = lu_site2md(ls);
4379                 OBD_FREE_PTR(mite);
4380                 d->ld_site = NULL;
4381         }
4382         LASSERT(atomic_read(&d->ld_ref) == 0);
4383
4384         EXIT;
4385 }
4386
4387 static int mdt_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
4388 {
4389         struct mdt_device       *m = mdt_dev(obd->obd_lu_dev);
4390         struct sptlrpc_rule_set  tmp_rset;
4391         int                      rc;
4392
4393         sptlrpc_rule_set_init(&tmp_rset);
4394         rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
4395         if (rc) {
4396                 CERROR("mdt %s: failed get sptlrpc rules: %d\n",
4397                        obd->obd_name, rc);
4398                 return rc;
4399         }
4400
4401         sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
4402
4403         write_lock(&m->mdt_sptlrpc_lock);
4404         sptlrpc_rule_set_free(&m->mdt_sptlrpc_rset);
4405         m->mdt_sptlrpc_rset = tmp_rset;
4406         write_unlock(&m->mdt_sptlrpc_lock);
4407
4408         return 0;
4409 }
4410
4411 static void fsoptions_to_mdt_flags(struct mdt_device *m, char *options)
4412 {
4413         char *p = options;
4414
4415         m->mdt_opts.mo_mds_capa = 1;
4416         m->mdt_opts.mo_oss_capa = 1;
4417 #ifdef CONFIG_FS_POSIX_ACL
4418         /* ACLs should be enabled by default (b=13829) */
4419         m->mdt_opts.mo_acl = 1;
4420         LCONSOLE_INFO("Enabling ACL\n");
4421 #else
4422         m->mdt_opts.mo_acl = 0;
4423         LCONSOLE_INFO("Disabling ACL\n");
4424 #endif
4425
4426         if (!options)
4427                 return;
4428
4429         while (*options) {
4430                 int len;
4431
4432                 while (*p && *p != ',')
4433                         p++;
4434
4435                 len = p - options;
4436                 if ((len == sizeof("user_xattr") - 1) &&
4437                     (memcmp(options, "user_xattr", len) == 0)) {
4438                         m->mdt_opts.mo_user_xattr = 1;
4439                         LCONSOLE_INFO("Enabling user_xattr\n");
4440                 } else if ((len == sizeof("nouser_xattr") - 1) &&
4441                            (memcmp(options, "nouser_xattr", len) == 0)) {
4442                         m->mdt_opts.mo_user_xattr = 0;
4443                         LCONSOLE_INFO("Disabling user_xattr\n");
4444                 } else if ((len == sizeof("noacl") - 1) &&
4445                            (memcmp(options, "noacl", len) == 0)) {
4446                         m->mdt_opts.mo_acl = 0;
4447                         LCONSOLE_INFO("Disabling ACL\n");
4448                 }
4449
4450                 options = ++p;
4451         }
4452 }
4453
4454 int mdt_postrecov(const struct lu_env *, struct mdt_device *);
4455
4456 static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
4457                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
4458 {
4459         struct lprocfs_static_vars lvars;
4460         struct mdt_thread_info    *info;
4461         struct obd_device         *obd;
4462         const char                *dev = lustre_cfg_string(cfg, 0);
4463         const char                *num = lustre_cfg_string(cfg, 2);
4464         struct lustre_mount_info  *lmi = NULL;
4465         struct lustre_sb_info     *lsi;
4466         struct lustre_disk_data   *ldd;
4467         struct lu_site            *s;
4468         struct md_site            *mite;
4469         const char                *identity_upcall = "NONE";
4470 #ifdef HAVE_QUOTA_SUPPORT
4471         struct md_device          *next;
4472 #endif
4473         int                        rc;
4474         int                        node_id;
4475         ENTRY;
4476
4477         md_device_init(&m->mdt_md_dev, ldt);
4478         /*
4479          * Environment (env) might be missing mdt_thread_key values at that
4480          * point, if device is allocated when mdt_thread_key is in QUIESCENT
4481          * mode.
4482          *
4483          * Usually device allocation path doesn't use module key values, but
4484          * mdt has to do a lot of work here, so allocate key value.
4485          */
4486         rc = lu_env_refill((struct lu_env *)env);
4487         if (rc != 0)
4488                 RETURN(rc);
4489
4490         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
4491         LASSERT(info != NULL);
4492
4493         obd = class_name2obd(dev);
4494         LASSERT(obd != NULL);
4495
4496         spin_lock_init(&m->mdt_transno_lock);
4497
4498         m->mdt_max_mdsize = MAX_MD_SIZE;
4499         m->mdt_max_cookiesize = sizeof(struct llog_cookie);
4500         m->mdt_som_conf = 0;
4501
4502         m->mdt_opts.mo_user_xattr = 0;
4503         m->mdt_opts.mo_acl = 0;
4504         m->mdt_opts.mo_cos = MDT_COS_DEFAULT;
4505         lmi = server_get_mount_2(dev);
4506         if (lmi == NULL) {
4507                 CERROR("Cannot get mount info for %s!\n", dev);
4508                 RETURN(-EFAULT);
4509         } else {
4510                 lsi = s2lsi(lmi->lmi_sb);
4511                 fsoptions_to_mdt_flags(m, lsi->lsi_lmd->lmd_opts);
4512                 /* CMD is supported only in IAM mode */
4513                 ldd = lsi->lsi_ldd;
4514                 LASSERT(num);
4515                 node_id = simple_strtol(num, NULL, 10);
4516                 if (!(ldd->ldd_flags & LDD_F_IAM_DIR) && node_id) {
4517                         CERROR("CMD Operation not allowed in IOP mode\n");
4518                         GOTO(err_lmi, rc = -EINVAL);
4519                 }
4520         }
4521
4522         rwlock_init(&m->mdt_sptlrpc_lock);
4523         sptlrpc_rule_set_init(&m->mdt_sptlrpc_rset);
4524
4525         spin_lock_init(&m->mdt_ioepoch_lock);
4526         m->mdt_opts.mo_compat_resname = 0;
4527         m->mdt_capa_timeout = CAPA_TIMEOUT;
4528         m->mdt_capa_alg = CAPA_HMAC_ALG_SHA1;
4529         m->mdt_ck_timeout = CAPA_KEY_TIMEOUT;
4530         m->mdt_squash_uid = 0;
4531         m->mdt_squash_gid = 0;
4532         CFS_INIT_LIST_HEAD(&m->mdt_nosquash_nids);
4533         m->mdt_nosquash_str = NULL;
4534         m->mdt_nosquash_strlen = 0;
4535         init_rwsem(&m->mdt_squash_sem);
4536
4537         spin_lock_init(&m->mdt_client_bitmap_lock);
4538
4539         OBD_ALLOC_PTR(mite);
4540         if (mite == NULL)
4541                 GOTO(err_lmi, rc = -ENOMEM);
4542
4543         s = &mite->ms_lu;
4544
4545         m->mdt_md_dev.md_lu_dev.ld_ops = &mdt_lu_ops;
4546         m->mdt_md_dev.md_lu_dev.ld_obd = obd;
4547         /* set this lu_device to obd, because error handling need it */
4548         obd->obd_lu_dev = &m->mdt_md_dev.md_lu_dev;
4549
4550         rc = lu_site_init(s, &m->mdt_md_dev.md_lu_dev);
4551         if (rc) {
4552                 CERROR("Can't init lu_site, rc %d\n", rc);
4553                 GOTO(err_free_site, rc);
4554         }
4555
4556         lprocfs_mdt_init_vars(&lvars);
4557         rc = lprocfs_obd_setup(obd, lvars.obd_vars);
4558         if (rc) {
4559                 CERROR("Can't init lprocfs, rc %d\n", rc);
4560                 GOTO(err_fini_site, rc);
4561         }
4562         ptlrpc_lprocfs_register_obd(obd);
4563
4564         rc = mdt_procfs_init(m, dev);
4565         if (rc) {
4566                 CERROR("Can't init MDT lprocfs, rc %d\n", rc);
4567                 GOTO(err_fini_proc, rc);
4568         }
4569
4570         obd->obd_proc_exports_entry = proc_mkdir("exports",
4571                                                  obd->obd_proc_entry);
4572         if (obd->obd_proc_exports_entry)
4573                 lprocfs_add_simple(obd->obd_proc_exports_entry,
4574                                    "clear", lprocfs_nid_stats_clear_read,
4575                                    lprocfs_nid_stats_clear_write, obd, NULL);
4576
4577         /* set server index */
4578         lu_site2md(s)->ms_node_id = node_id;
4579
4580         /* failover is the default
4581          * FIXME: we do not failout mds0/mgs, which may cause some problems.
4582          * assumed whose ms_node_id == 0 XXX
4583          * */
4584         obd->obd_replayable = 1;
4585         /* No connection accepted until configurations will finish */
4586         obd->obd_no_conn = 1;
4587
4588         if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
4589                 char *str = lustre_cfg_string(cfg, 4);
4590                 if (strchr(str, 'n')) {
4591                         CWARN("%s: recovery disabled\n", obd->obd_name);
4592                         obd->obd_replayable = 0;
4593                 }
4594         }
4595
4596         /* init the stack */
4597         rc = mdt_stack_init((struct lu_env *)env, m, cfg, lmi);
4598         if (rc) {
4599                 CERROR("Can't init device stack, rc %d\n", rc);
4600                 GOTO(err_fini_proc, rc);
4601         }
4602
4603         rc = lut_init(env, &m->mdt_lut, obd, m->mdt_bottom);
4604         if (rc)
4605                 GOTO(err_fini_stack, rc);
4606
4607         rc = mdt_fld_init(env, obd->obd_name, m);
4608         if (rc)
4609                 GOTO(err_lut, rc);
4610
4611         rc = mdt_seq_init(env, obd->obd_name, m);
4612         if (rc)
4613                 GOTO(err_fini_fld, rc);
4614
4615         snprintf(info->mti_u.ns_name, sizeof info->mti_u.ns_name,
4616                  LUSTRE_MDT_NAME"-%p", m);
4617         m->mdt_namespace = ldlm_namespace_new(obd, info->mti_u.ns_name,
4618                                               LDLM_NAMESPACE_SERVER,
4619                                               LDLM_NAMESPACE_GREEDY);
4620         if (m->mdt_namespace == NULL)
4621                 GOTO(err_fini_seq, rc = -ENOMEM);
4622
4623         ldlm_register_intent(m->mdt_namespace, mdt_intent_policy);
4624         /* set obd_namespace for compatibility with old code */
4625         obd->obd_namespace = m->mdt_namespace;
4626
4627         /* XXX: to support suppgid for ACL, we enable identity_upcall
4628          * by default, otherwise, maybe got unexpected -EACCESS. */
4629         if (m->mdt_opts.mo_acl)
4630                 identity_upcall = MDT_IDENTITY_UPCALL_PATH;
4631
4632         m->mdt_identity_cache = upcall_cache_init(obd->obd_name, identity_upcall,
4633                                                   &mdt_identity_upcall_cache_ops);
4634         if (IS_ERR(m->mdt_identity_cache)) {
4635                 rc = PTR_ERR(m->mdt_identity_cache);
4636                 m->mdt_identity_cache = NULL;
4637                 GOTO(err_free_ns, rc);
4638         }
4639
4640         cfs_timer_init(&m->mdt_ck_timer, mdt_ck_timer_callback, m);
4641
4642         rc = mdt_ck_thread_start(m);
4643         if (rc)
4644                 GOTO(err_free_ns, rc);
4645
4646         rc = mdt_fs_setup(env, m, obd, lsi);
4647         if (rc)
4648                 GOTO(err_capa, rc);
4649
4650         rc = mdt_obd_llog_setup(obd, lsi);
4651         if (rc)
4652                 GOTO(err_fs_cleanup, rc);
4653
4654         rc = mdt_llog_ctxt_clone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
4655         if (rc)
4656                 GOTO(err_llog_cleanup, rc);
4657
4658         mdt_adapt_sptlrpc_conf(obd, 1);
4659
4660 #ifdef HAVE_QUOTA_SUPPORT
4661         next = m->mdt_child;
4662         rc = next->md_ops->mdo_quota.mqo_setup(env, next, lmi->lmi_mnt);
4663         if (rc)
4664                 GOTO(err_llog_cleanup, rc);
4665 #endif
4666
4667         server_put_mount_2(dev, lmi->lmi_mnt);
4668         lmi = NULL;
4669
4670         target_recovery_init(&m->mdt_lut, mdt_recovery_handle);
4671
4672         rc = mdt_start_ptlrpc_service(m);
4673         if (rc)
4674                 GOTO(err_recovery, rc);
4675
4676         ping_evictor_start();
4677
4678         rc = lu_site_init_finish(s);
4679         if (rc)
4680                 GOTO(err_stop_service, rc);
4681
4682         if (obd->obd_recovering == 0)
4683                 mdt_postrecov(env, m);
4684
4685         mdt_init_capa_ctxt(env, m);
4686
4687         /* Reduce the initial timeout on an MDS because it doesn't need such
4688          * a long timeout as an OST does. Adaptive timeouts will adjust this
4689          * value appropriately. */
4690         if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
4691                 ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
4692
4693         RETURN(0);
4694
4695 err_stop_service:
4696         ping_evictor_stop();
4697         mdt_stop_ptlrpc_service(m);
4698 err_recovery:
4699         target_recovery_fini(obd);
4700 #ifdef HAVE_QUOTA_SUPPORT
4701         next->md_ops->mdo_quota.mqo_cleanup(env, next);
4702 #endif
4703 err_llog_cleanup:
4704         mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
4705         mdt_obd_llog_cleanup(obd);
4706 err_fs_cleanup:
4707         mdt_fs_cleanup(env, m);
4708 err_capa:
4709         cfs_timer_disarm(&m->mdt_ck_timer);
4710         mdt_ck_thread_stop(m);
4711 err_free_ns:
4712         upcall_cache_cleanup(m->mdt_identity_cache);
4713         m->mdt_identity_cache = NULL;
4714         ldlm_namespace_free(m->mdt_namespace, NULL, 0);
4715         obd->obd_namespace = m->mdt_namespace = NULL;
4716 err_fini_seq:
4717         mdt_seq_fini(env, m);
4718 err_fini_fld:
4719         mdt_fld_fini(env, m);
4720 err_lut:
4721         lut_fini(env, &m->mdt_lut);
4722 err_fini_stack:
4723         mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
4724 err_fini_proc:
4725         mdt_procfs_fini(m);
4726         if (obd->obd_proc_exports_entry) {
4727                 lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
4728                 obd->obd_proc_exports_entry = NULL;
4729         }
4730         ptlrpc_lprocfs_unregister_obd(obd);
4731         lprocfs_obd_cleanup(obd);
4732 err_fini_site:
4733         lu_site_fini(s);
4734 err_free_site:
4735         OBD_FREE_PTR(mite);
4736 err_lmi:
4737         if (lmi)
4738                 server_put_mount_2(dev, lmi->lmi_mnt);
4739         return (rc);
4740 }
4741
4742 /* used by MGS to process specific configurations */
4743 static int mdt_process_config(const struct lu_env *env,
4744                               struct lu_device *d, struct lustre_cfg *cfg)
4745 {
4746         struct mdt_device *m = mdt_dev(d);
4747         struct md_device *md_next = m->mdt_child;
4748         struct lu_device *next = md2lu_dev(md_next);
4749         int rc = 0;
4750         ENTRY;
4751
4752         switch (cfg->lcfg_command) {
4753         case LCFG_PARAM: {
4754                 struct lprocfs_static_vars lvars;
4755                 struct obd_device *obd = d->ld_obd;
4756
4757                 /*
4758                  * For interoperability between 1.8 and 2.0,
4759                  * skip old "mdt.group_upcall" param.
4760                  */
4761                 {
4762                         char *param = lustre_cfg_string(cfg, 1);
4763                         if (param && !strncmp("mdt.group_upcall", param, 16)) {
4764                                 CWARN("For 1.8 interoperability, skip this"
4765                                        " mdt.group_upcall. It is obsolete\n");
4766                                 break;
4767                         }
4768                 }
4769
4770                 lprocfs_mdt_init_vars(&lvars);
4771                 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars,
4772                                               cfg, obd);
4773                 if (rc > 0 || rc == -ENOSYS)
4774                         /* we don't understand; pass it on */
4775                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
4776                 break;
4777         }
4778         case LCFG_ADD_MDC:
4779                 /*
4780                  * Add mdc hook to get first MDT uuid and connect it to
4781                  * ls->controller to use for seq manager.
4782                  */
4783                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
4784                 if (rc)
4785                         CERROR("Can't add mdc, rc %d\n", rc);
4786                 else
4787                         rc = mdt_seq_init_cli(env, mdt_dev(d), cfg);
4788                 break;
4789         default:
4790                 /* others are passed further */
4791                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
4792                 break;
4793         }
4794         RETURN(rc);
4795 }
4796
4797 static struct lu_object *mdt_object_alloc(const struct lu_env *env,
4798                                           const struct lu_object_header *hdr,
4799                                           struct lu_device *d)
4800 {
4801         struct mdt_object *mo;
4802
4803         ENTRY;
4804
4805         OBD_ALLOC_PTR(mo);
4806         if (mo != NULL) {
4807                 struct lu_object *o;
4808                 struct lu_object_header *h;
4809
4810                 o = &mo->mot_obj.mo_lu;
4811                 h = &mo->mot_header;
4812                 lu_object_header_init(h);
4813                 lu_object_init(o, h, d);
4814                 lu_object_add_top(h, o);
4815                 o->lo_ops = &mdt_obj_ops;
4816                 RETURN(o);
4817         } else
4818                 RETURN(NULL);
4819 }
4820
4821 static int mdt_object_init(const struct lu_env *env, struct lu_object *o,
4822                            const struct lu_object_conf *unused)
4823 {
4824         struct mdt_device *d = mdt_dev(o->lo_dev);
4825         struct lu_device  *under;
4826         struct lu_object  *below;
4827         int                rc = 0;
4828         ENTRY;
4829
4830         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
4831                PFID(lu_object_fid(o)));
4832
4833         under = &d->mdt_child->md_lu_dev;
4834         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
4835         if (below != NULL) {
4836                 lu_object_add(o, below);
4837         } else
4838                 rc = -ENOMEM;
4839
4840         RETURN(rc);
4841 }
4842
4843 static void mdt_object_free(const struct lu_env *env, struct lu_object *o)
4844 {
4845         struct mdt_object *mo = mdt_obj(o);
4846         struct lu_object_header *h;
4847         ENTRY;
4848
4849         h = o->lo_header;
4850         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
4851                PFID(lu_object_fid(o)));
4852
4853         lu_object_fini(o);
4854         lu_object_header_fini(h);
4855         OBD_FREE_PTR(mo);
4856         EXIT;
4857 }
4858
4859 static int mdt_object_print(const struct lu_env *env, void *cookie,
4860                             lu_printer_t p, const struct lu_object *o)
4861 {
4862         struct mdt_object *mdto = mdt_obj((struct lu_object *)o);
4863         return (*p)(env, cookie, LUSTRE_MDT_NAME"-object@%p(ioepoch=%llu "
4864                     "flags=%llx, epochcount=%d, writecount=%d)",
4865                     mdto, mdto->mot_ioepoch, mdto->mot_flags,
4866                     mdto->mot_epochcount, mdto->mot_writecount);
4867 }
4868
4869 static const struct lu_device_operations mdt_lu_ops = {
4870         .ldo_object_alloc   = mdt_object_alloc,
4871         .ldo_process_config = mdt_process_config,
4872 };
4873
4874 static const struct lu_object_operations mdt_obj_ops = {
4875         .loo_object_init    = mdt_object_init,
4876         .loo_object_free    = mdt_object_free,
4877         .loo_object_print   = mdt_object_print
4878 };
4879
4880 static int mdt_obd_set_info_async(struct obd_export *exp,
4881                                   __u32 keylen, void *key,
4882                                   __u32 vallen, void *val,
4883                                   struct ptlrpc_request_set *set)
4884 {
4885         struct obd_device     *obd = exp->exp_obd;
4886         int                    rc;
4887         ENTRY;
4888
4889         LASSERT(obd);
4890
4891         if (KEY_IS(KEY_SPTLRPC_CONF)) {
4892                 rc = mdt_adapt_sptlrpc_conf(obd, 0);
4893                 RETURN(rc);
4894         }
4895
4896         RETURN(0);
4897 }
4898
4899 /* mds_connect_internal */
4900 static int mdt_connect_internal(struct obd_export *exp,
4901                                 struct mdt_device *mdt,
4902                                 struct obd_connect_data *data)
4903 {
4904         if (data != NULL) {
4905                 data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
4906                 data->ocd_ibits_known &= MDS_INODELOCK_FULL;
4907
4908                 /* If no known bits (which should not happen, probably,
4909                    as everybody should support LOOKUP and UPDATE bits at least)
4910                    revert to compat mode with plain locks. */
4911                 if (!data->ocd_ibits_known &&
4912                     data->ocd_connect_flags & OBD_CONNECT_IBITS)
4913                         data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
4914
4915                 if (!mdt->mdt_opts.mo_acl)
4916                         data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
4917
4918                 if (!mdt->mdt_opts.mo_user_xattr)
4919                         data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
4920
4921                 if (!mdt->mdt_som_conf)
4922                         data->ocd_connect_flags &= ~OBD_CONNECT_SOM;
4923
4924                 spin_lock(&exp->exp_lock);
4925                 exp->exp_connect_flags = data->ocd_connect_flags;
4926                 spin_unlock(&exp->exp_lock);
4927                 data->ocd_version = LUSTRE_VERSION_CODE;
4928                 exp->exp_mdt_data.med_ibits_known = data->ocd_ibits_known;
4929         }
4930
4931 #if 0
4932         if (mdt->mdt_opts.mo_acl &&
4933             ((exp->exp_connect_flags & OBD_CONNECT_ACL) == 0)) {
4934                 CWARN("%s: MDS requires ACL support but client does not\n",
4935                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
4936                 return -EBADE;
4937         }
4938 #endif
4939
4940         if ((exp->exp_connect_flags & OBD_CONNECT_FID) == 0) {
4941                 CWARN("%s: MDS requires FID support, but client not\n",
4942                       mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
4943                 return -EBADE;
4944         }
4945
4946         if (mdt->mdt_som_conf &&
4947             !(exp->exp_connect_flags & OBD_CONNECT_MDS_MDS) &&
4948             !(exp->exp_connect_flags & OBD_CONNECT_SOM)) {
4949                 CWARN("%s: MDS has SOM enabled, but client does not support "
4950                       "it\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name);
4951                 return -EBADE;
4952         }
4953
4954         return 0;
4955 }
4956
4957 static int mdt_connect_check_sptlrpc(struct mdt_device *mdt,
4958                                      struct obd_export *exp,
4959                                      struct ptlrpc_request *req)
4960 {
4961         struct sptlrpc_flavor   flvr;
4962         int                     rc = 0;
4963
4964         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
4965                 read_lock(&mdt->mdt_sptlrpc_lock);
4966                 sptlrpc_target_choose_flavor(&mdt->mdt_sptlrpc_rset,
4967                                              req->rq_sp_from,
4968                                              req->rq_peer.nid,
4969                                              &flvr);
4970                 read_unlock(&mdt->mdt_sptlrpc_lock);
4971
4972                 spin_lock(&exp->exp_lock);
4973
4974                 exp->exp_sp_peer = req->rq_sp_from;
4975                 exp->exp_flvr = flvr;
4976
4977                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
4978                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
4979                         CERROR("unauthorized rpc flavor %x from %s, "
4980                                "expect %x\n", req->rq_flvr.sf_rpc,
4981                                libcfs_nid2str(req->rq_peer.nid),
4982                                exp->exp_flvr.sf_rpc);
4983                         rc = -EACCES;
4984                 }
4985
4986                 spin_unlock(&exp->exp_lock);
4987         } else {
4988                 if (exp->exp_sp_peer != req->rq_sp_from) {
4989                         CERROR("RPC source %s doesn't match %s\n",
4990                                sptlrpc_part2name(req->rq_sp_from),
4991                                sptlrpc_part2name(exp->exp_sp_peer));
4992                         rc = -EACCES;
4993                 } else {
4994                         rc = sptlrpc_target_export_check(exp, req);
4995                 }
4996         }
4997
4998         return rc;
4999 }
5000
5001 /* mds_connect copy */
5002 static int mdt_obd_connect(const struct lu_env *env,
5003                            struct obd_export **exp, struct obd_device *obd,
5004                            struct obd_uuid *cluuid,
5005                            struct obd_connect_data *data,
5006                            void *localdata)
5007 {
5008         struct mdt_thread_info *info;
5009         struct lsd_client_data *lcd;
5010         struct obd_export      *lexp;
5011         struct lustre_handle    conn = { 0 };
5012         struct mdt_device      *mdt;
5013         struct ptlrpc_request  *req;
5014         int                     rc;
5015         ENTRY;
5016
5017         LASSERT(env != NULL);
5018         if (!exp || !obd || !cluuid)
5019                 RETURN(-EINVAL);
5020
5021         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5022         req = info->mti_pill->rc_req;
5023         mdt = mdt_dev(obd->obd_lu_dev);
5024
5025         rc = class_connect(&conn, obd, cluuid);
5026         if (rc)
5027                 RETURN(rc);
5028
5029         lexp = class_conn2export(&conn);
5030         LASSERT(lexp != NULL);
5031
5032         rc = mdt_connect_check_sptlrpc(mdt, lexp, req);
5033         if (rc)
5034                 GOTO(out, rc);
5035
5036         rc = mdt_connect_internal(lexp, mdt, data);
5037         if (rc == 0) {
5038                 OBD_ALLOC_PTR(lcd);
5039                 if (lcd != NULL) {
5040                         struct mdt_thread_info *mti;
5041                         mti = lu_context_key_get(&env->le_ctx,
5042                                                  &mdt_thread_key);
5043                         LASSERT(mti != NULL);
5044                         mti->mti_exp = lexp;
5045                         memcpy(lcd->lcd_uuid, cluuid, sizeof lcd->lcd_uuid);
5046                         lexp->exp_mdt_data.med_lcd = lcd;
5047                         rc = mdt_client_new(env, mdt);
5048                         if (rc != 0) {
5049                                 OBD_FREE_PTR(lcd);
5050                                 lexp->exp_mdt_data.med_lcd = NULL;
5051                         } else {
5052                                 mdt_export_stats_init(obd, lexp, localdata);
5053                         }
5054                 } else
5055                         rc = -ENOMEM;
5056         }
5057
5058 out:
5059         if (rc != 0)
5060                 class_disconnect(lexp);
5061         else
5062                 *exp = lexp;
5063
5064         RETURN(rc);
5065 }
5066
5067 static int mdt_obd_reconnect(const struct lu_env *env,
5068                              struct obd_export *exp, struct obd_device *obd,
5069                              struct obd_uuid *cluuid,
5070                              struct obd_connect_data *data,
5071                              void *localdata)
5072 {
5073         struct mdt_thread_info *info;
5074         struct mdt_device      *mdt;
5075         struct ptlrpc_request  *req;
5076         int                     rc;
5077         ENTRY;
5078
5079         if (exp == NULL || obd == NULL || cluuid == NULL)
5080                 RETURN(-EINVAL);
5081
5082         info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5083         req = info->mti_pill->rc_req;
5084         mdt = mdt_dev(obd->obd_lu_dev);
5085
5086         rc = mdt_connect_check_sptlrpc(mdt, exp, req);
5087         if (rc)
5088                 RETURN(rc);
5089
5090         rc = mdt_connect_internal(exp, mdt_dev(obd->obd_lu_dev), data);
5091         if (rc == 0)
5092                 mdt_export_stats_init(obd, exp, localdata);
5093
5094         RETURN(rc);
5095 }
5096 static int mdt_export_cleanup(struct obd_export *exp)
5097 {
5098         struct mdt_export_data *med = &exp->exp_mdt_data;
5099         struct obd_device      *obd = exp->exp_obd;
5100         struct mdt_device      *mdt;
5101         struct mdt_thread_info *info;
5102         struct lu_env           env;
5103         CFS_LIST_HEAD(closing_list);
5104         struct mdt_file_data *mfd, *n;
5105         int rc = 0;
5106         ENTRY;
5107
5108         spin_lock(&med->med_open_lock);
5109         while (!list_empty(&med->med_open_head)) {
5110                 struct list_head *tmp = med->med_open_head.next;
5111                 mfd = list_entry(tmp, struct mdt_file_data, mfd_list);
5112
5113                 /* Remove mfd handle so it can't be found again.
5114                  * We are consuming the mfd_list reference here. */
5115                 class_handle_unhash(&mfd->mfd_handle);
5116                 list_move_tail(&mfd->mfd_list, &closing_list);
5117         }
5118         spin_unlock(&med->med_open_lock);
5119         mdt = mdt_dev(obd->obd_lu_dev);
5120         LASSERT(mdt != NULL);
5121
5122         rc = lu_env_init(&env, LCT_MD_THREAD);
5123         if (rc)
5124                 RETURN(rc);
5125
5126         info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
5127         LASSERT(info != NULL);
5128         memset(info, 0, sizeof *info);
5129         info->mti_env = &env;
5130         info->mti_mdt = mdt;
5131         info->mti_exp = exp;
5132
5133         if (!list_empty(&closing_list)) {
5134                 struct md_attr *ma = &info->mti_attr;
5135                 int lmm_size;
5136                 int cookie_size;
5137
5138                 lmm_size = mdt->mdt_max_mdsize;
5139                 OBD_ALLOC(ma->ma_lmm, lmm_size);
5140                 if (ma->ma_lmm == NULL)
5141                         GOTO(out_lmm, rc = -ENOMEM);
5142
5143                 cookie_size = mdt->mdt_max_cookiesize;
5144                 OBD_ALLOC(ma->ma_cookie, cookie_size);
5145                 if (ma->ma_cookie == NULL)
5146                         GOTO(out_cookie, rc = -ENOMEM);
5147
5148                 /* Close any open files (which may also cause orphan unlinking). */
5149                 list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
5150                         list_del_init(&mfd->mfd_list);
5151                         memset(&ma->ma_attr, 0, sizeof(ma->ma_attr));
5152                         ma->ma_lmm_size = lmm_size;
5153                         ma->ma_cookie_size = cookie_size;
5154                         ma->ma_need = 0;
5155                         /* It is not for setattr, just tell MDD to send
5156                          * DESTROY RPC to OSS if needed */
5157                         ma->ma_attr_flags = MDS_CLOSE_CLEANUP;
5158                         ma->ma_valid = MA_FLAGS;
5159                         mdt_mfd_close(info, mfd);
5160                 }
5161                 OBD_FREE(ma->ma_cookie, cookie_size);
5162                 ma->ma_cookie = NULL;
5163 out_cookie:
5164                 OBD_FREE(ma->ma_lmm, lmm_size);
5165                 ma->ma_lmm = NULL;
5166         }
5167 out_lmm:
5168         info->mti_mdt = NULL;
5169         /* cleanup client slot early */
5170         mdt_client_del(&env, mdt);
5171         lu_env_fini(&env);
5172
5173         RETURN(rc);
5174 }
5175
5176 static int mdt_obd_disconnect(struct obd_export *exp)
5177 {
5178         int rc;
5179         ENTRY;
5180
5181         LASSERT(exp);
5182         class_export_get(exp);
5183
5184         rc = server_disconnect_export(exp);
5185         if (rc != 0)
5186                 CDEBUG(D_IOCTL, "server disconnect error: %d\n", rc);
5187
5188         rc = mdt_export_cleanup(exp);
5189         class_export_put(exp);
5190         RETURN(rc);
5191 }
5192
5193 /* FIXME: Can we avoid using these two interfaces? */
5194 static int mdt_init_export(struct obd_export *exp)
5195 {
5196         struct mdt_export_data *med = &exp->exp_mdt_data;
5197         int                     rc;
5198         ENTRY;
5199
5200         CFS_INIT_LIST_HEAD(&med->med_open_head);
5201         spin_lock_init(&med->med_open_lock);
5202         sema_init(&med->med_idmap_sem, 1);
5203         med->med_idmap = NULL;
5204         spin_lock(&exp->exp_lock);
5205         exp->exp_connecting = 1;
5206         spin_unlock(&exp->exp_lock);
5207         rc = ldlm_init_export(exp);
5208         if (rc)
5209                 CERROR("Error %d while initializing export\n", rc);
5210         RETURN(rc);
5211 }
5212
5213 static int mdt_destroy_export(struct obd_export *exp)
5214 {
5215         struct mdt_export_data *med;
5216         int rc = 0;
5217         ENTRY;
5218
5219         med = &exp->exp_mdt_data;
5220         if (exp_connect_rmtclient(exp))
5221                 mdt_cleanup_idmap(&exp->exp_mdt_data);
5222
5223         target_destroy_export(exp);
5224         ldlm_destroy_export(exp);
5225
5226         LASSERT(list_empty(&exp->exp_outstanding_replies));
5227         LASSERT(list_empty(&exp->exp_mdt_data.med_open_head));
5228         if (obd_uuid_equals(&exp->exp_client_uuid, &exp->exp_obd->obd_uuid))
5229                 RETURN(0);
5230
5231         RETURN(rc);
5232 }
5233
5234 static void mdt_allow_cli(struct mdt_device *m, unsigned int flag)
5235 {
5236         if (flag & CONFIG_LOG)
5237                 m->mdt_fl_cfglog = 1;
5238
5239         /* also notify active event */
5240         if (flag & CONFIG_SYNC)
5241                 m->mdt_fl_synced = 1;
5242
5243         if (m->mdt_fl_cfglog && m->mdt_fl_synced)
5244                 /* Open for clients */
5245                 m->mdt_md_dev.md_lu_dev.ld_obd->obd_no_conn = 0;
5246 }
5247
5248 static int mdt_upcall(const struct lu_env *env, struct md_device *md,
5249                       enum md_upcall_event ev, void *data)
5250 {
5251         struct mdt_device *m = mdt_dev(&md->md_lu_dev);
5252         struct md_device  *next  = m->mdt_child;
5253         struct mdt_thread_info *mti;
5254         int rc = 0;
5255         ENTRY;
5256
5257         switch (ev) {
5258                 case MD_LOV_SYNC:
5259                         rc = next->md_ops->mdo_maxsize_get(env, next,
5260                                         &m->mdt_max_mdsize,
5261                                         &m->mdt_max_cookiesize);
5262                         CDEBUG(D_INFO, "get max mdsize %d max cookiesize %d\n",
5263                                      m->mdt_max_mdsize, m->mdt_max_cookiesize);
5264                         mdt_allow_cli(m, CONFIG_SYNC);
5265                         if (data)
5266                                 (*(__u64 *)data) = m->mdt_mount_count;
5267                         break;
5268                 case MD_NO_TRANS:
5269                         mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
5270                         mti->mti_no_need_trans = 1;
5271                         CDEBUG(D_INFO, "disable mdt trans for this thread\n");
5272                         break;
5273                 case MD_LOV_CONFIG:
5274                         /* Check that MDT is not yet configured */
5275                         LASSERT(!m->mdt_fl_cfglog);
5276                         break;
5277 #ifdef HAVE_QUOTA_SUPPORT
5278                 case MD_LOV_QUOTA:
5279                         if (md->md_lu_dev.ld_obd->obd_recovering == 0 &&
5280                             likely(md->md_lu_dev.ld_obd->obd_stopping == 0))
5281                                 next->md_ops->mdo_quota.mqo_recovery(env, next);
5282                         break;
5283 #endif
5284                 default:
5285                         CERROR("invalid event\n");
5286                         rc = -EINVAL;
5287                         break;
5288         }
5289         RETURN(rc);
5290 }
5291
5292 static int mdt_obd_notify(struct obd_device *host,
5293                           struct obd_device *watched,
5294                           enum obd_notify_event ev, void *data)
5295 {
5296         struct mdt_device *mdt = mdt_dev(host->obd_lu_dev);
5297 #ifdef HAVE_QUOTA_SUPPORT
5298         struct md_device *next = mdt->mdt_child;
5299 #endif
5300         ENTRY;
5301
5302         switch (ev) {
5303         case OBD_NOTIFY_CONFIG:
5304                 mdt_allow_cli(mdt, (unsigned long)data);
5305
5306 #ifdef HAVE_QUOTA_SUPPORT
5307                /* quota_type has been processed, we can now handle
5308                 * incoming quota requests */
5309                 next->md_ops->mdo_quota.mqo_notify(NULL, next);
5310 #endif
5311                 break;
5312         default:
5313                 CDEBUG(D_INFO, "Unhandled notification %#x\n", ev);
5314         }
5315         RETURN(0);
5316 }
5317
5318 static int mdt_rpc_fid2path(struct mdt_thread_info *info, void *key,
5319                             void *val, int vallen)
5320 {
5321         struct mdt_device *mdt = mdt_dev(info->mti_exp->exp_obd->obd_lu_dev);
5322         struct getinfo_fid2path *fpout, *fpin;
5323         int rc = 0;
5324
5325         fpin = key + size_round(sizeof(KEY_FID2PATH));
5326         fpout = val;
5327
5328         if (ptlrpc_req_need_swab(info->mti_pill->rc_req))
5329                 lustre_swab_fid2path(fpin);
5330
5331         memcpy(fpout, fpin, sizeof(*fpin));
5332         if (fpout->gf_pathlen != vallen - sizeof(*fpin))
5333                 RETURN(-EINVAL);
5334
5335         rc = mdt_fid2path(info->mti_env, mdt, fpout);
5336         RETURN(rc);
5337 }
5338
5339 static int mdt_fid2path(const struct lu_env *env, struct mdt_device *mdt,
5340                         struct getinfo_fid2path *fp)
5341 {
5342         struct mdt_object *obj;
5343         int    rc;
5344         ENTRY;
5345
5346         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
5347                PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
5348
5349         if (!fid_is_sane(&fp->gf_fid))
5350                 RETURN(-EINVAL);
5351
5352         obj = mdt_object_find(env, mdt, &fp->gf_fid);
5353         if (obj == NULL || IS_ERR(obj)) {
5354                 CDEBUG(D_IOCTL, "no object "DFID": %ld\n",PFID(&fp->gf_fid),
5355                        PTR_ERR(obj));
5356                 RETURN(-EINVAL);
5357         }
5358
5359         rc = lu_object_exists(&obj->mot_obj.mo_lu);
5360         if (rc <= 0) {
5361                 if (rc == -1)
5362                         rc = -EREMOTE;
5363                 else
5364                         rc = -ENOENT;
5365                 mdt_object_put(env, obj);
5366                 CDEBUG(D_IOCTL, "nonlocal object "DFID": %d\n",
5367                        PFID(&fp->gf_fid), rc);
5368                 RETURN(rc);
5369         }
5370
5371         rc = mo_path(env, md_object_next(&obj->mot_obj), fp->gf_path,
5372                      fp->gf_pathlen, &fp->gf_recno, &fp->gf_linkno);
5373         mdt_object_put(env, obj);
5374
5375         RETURN(rc);
5376 }
5377
5378 static int mdt_get_info(struct mdt_thread_info *info)
5379 {
5380         struct ptlrpc_request *req = mdt_info_req(info);
5381         char *key;
5382         int keylen;
5383         __u32 *vallen;
5384         void *valout;
5385         int rc;
5386         ENTRY;
5387
5388         key = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_KEY);
5389         if (key == NULL) {
5390                 CDEBUG(D_IOCTL, "No GETINFO key");
5391                 RETURN(-EFAULT);
5392         }
5393         keylen = req_capsule_get_size(info->mti_pill, &RMF_GETINFO_KEY,
5394                                       RCL_CLIENT);
5395
5396         vallen = req_capsule_client_get(info->mti_pill, &RMF_GETINFO_VALLEN);
5397         if (vallen == NULL) {
5398                 CDEBUG(D_IOCTL, "Unable to get RMF_GETINFO_VALLEN buffer");
5399                 RETURN(-EFAULT);
5400         }
5401
5402         req_capsule_set_size(info->mti_pill, &RMF_GETINFO_VAL, RCL_SERVER,
5403                              *vallen);
5404         rc = req_capsule_server_pack(info->mti_pill);
5405         valout = req_capsule_server_get(info->mti_pill, &RMF_GETINFO_VAL);
5406         if (valout == NULL) {
5407                 CDEBUG(D_IOCTL, "Unable to get get-info RPC out buffer");
5408                 RETURN(-EFAULT);
5409         }
5410
5411         if (KEY_IS(KEY_FID2PATH))
5412                 rc = mdt_rpc_fid2path(info, key, valout, *vallen);
5413         else
5414                 rc = -EINVAL;
5415
5416         lustre_msg_set_status(req->rq_repmsg, rc);
5417
5418         RETURN(rc);
5419 }
5420
5421 /* Pass the ioc down */
5422 static int mdt_ioc_child(struct lu_env *env, struct mdt_device *mdt,
5423                          unsigned int cmd, int len, void *data)
5424 {
5425         struct lu_context ioctl_session;
5426         struct md_device *next = mdt->mdt_child;
5427         int rc;
5428         ENTRY;
5429
5430         rc = lu_context_init(&ioctl_session, LCT_SESSION);
5431         if (rc)
5432                 RETURN(rc);
5433         ioctl_session.lc_thread = (struct ptlrpc_thread *)cfs_current();
5434         lu_context_enter(&ioctl_session);
5435         env->le_ses = &ioctl_session;
5436
5437         LASSERT(next->md_ops->mdo_iocontrol);
5438         rc = next->md_ops->mdo_iocontrol(env, next, cmd, len, data);
5439
5440         lu_context_exit(&ioctl_session);
5441         lu_context_fini(&ioctl_session);
5442         RETURN(rc);
5443 }
5444
5445 static int mdt_ioc_version_get(struct mdt_thread_info *mti, void *karg)
5446 {
5447         struct obd_ioctl_data *data = karg;
5448         struct lu_fid *fid = (struct lu_fid *)data->ioc_inlbuf1;
5449         __u64 version;
5450         struct mdt_object *obj;
5451         struct mdt_lock_handle  *lh;
5452         int rc;
5453         ENTRY;
5454         CDEBUG(D_IOCTL, "getting version for "DFID"\n", PFID(fid));
5455         if (!fid_is_sane(fid))
5456                 RETURN(-EINVAL);
5457
5458         lh = &mti->mti_lh[MDT_LH_PARENT];
5459         mdt_lock_reg_init(lh, LCK_CR);
5460
5461         obj = mdt_object_find_lock(mti, fid, lh, MDS_INODELOCK_UPDATE);
5462         if (IS_ERR(obj))
5463                 RETURN(PTR_ERR(obj));
5464
5465         rc = mdt_object_exists(obj);
5466         if (rc < 0) {
5467                 rc = -EREMOTE;
5468                 /**
5469                  * before calling version get the correct MDS should be
5470                  * fid, this is error to find remote object here
5471                  */
5472                 CERROR("nonlocal object "DFID"\n", PFID(fid));
5473         } else if (rc == 0) {
5474                 rc = -ENOENT;
5475                 CDEBUG(D_IOCTL, "no such object: "DFID"\n", PFID(fid));
5476         } else {
5477                 version = mo_version_get(mti->mti_env, mdt_object_child(obj));
5478                 if (version < 0) {
5479                         rc = (int)version;
5480                 } else {
5481                         *(__u64 *)data->ioc_inlbuf2 = version;
5482                         rc = 0;
5483                 }
5484         }
5485         mdt_object_unlock_put(mti, obj, lh, 1);
5486         RETURN(rc);
5487 }
5488
5489 /* ioctls on obd dev */
5490 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
5491                          void *karg, void *uarg)
5492 {
5493         struct lu_env      env;
5494         struct obd_device *obd = exp->exp_obd;
5495         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
5496         struct dt_device  *dt = mdt->mdt_bottom;
5497         int rc;
5498
5499         ENTRY;
5500         CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
5501         rc = lu_env_init(&env, LCT_MD_THREAD);
5502         if (rc)
5503                 RETURN(rc);
5504
5505         switch (cmd) {
5506         case OBD_IOC_SYNC:
5507                 rc = mdt_device_sync(&env, mdt);
5508                 break;
5509         case OBD_IOC_SET_READONLY:
5510                 dt->dd_ops->dt_ro(&env, dt);
5511                 break;
5512         case OBD_IOC_ABORT_RECOVERY:
5513                 CERROR("Aborting recovery for device %s\n", obd->obd_name);
5514                 target_stop_recovery_thread(obd);
5515                 rc = 0;
5516                 break;
5517         case OBD_IOC_CHANGELOG_REG:
5518         case OBD_IOC_CHANGELOG_DEREG:
5519         case OBD_IOC_CHANGELOG_CLEAR:
5520                 rc = mdt_ioc_child(&env, mdt, cmd, len, karg);
5521                 break;
5522         case OBD_IOC_GET_OBJ_VERSION: {
5523                 struct mdt_thread_info *mti;
5524                 mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
5525                 memset(mti, 0, sizeof *mti);
5526                 mti->mti_env = &env;
5527                 mti->mti_mdt = mdt;
5528                 mti->mti_exp = exp;
5529
5530                 rc = mdt_ioc_version_get(mti, karg);
5531                 break;
5532         }
5533         default:
5534                 CERROR("Not supported cmd = %d for device %s\n",
5535                        cmd, obd->obd_name);
5536                 rc = -EOPNOTSUPP;
5537         }
5538
5539         lu_env_fini(&env);
5540         RETURN(rc);
5541 }
5542
5543 int mdt_postrecov(const struct lu_env *env, struct mdt_device *mdt)
5544 {
5545         struct lu_device *ld = md2lu_dev(mdt->mdt_child);
5546         struct obd_device *obd = mdt2obd_dev(mdt);
5547 #ifdef HAVE_QUOTA_SUPPORT
5548         struct md_device *next = mdt->mdt_child;
5549 #endif
5550         int rc, lost;
5551         ENTRY;
5552         /* if some clients didn't participate in recovery then we can possibly
5553          * lost sequence. Now we should increase sequence for safe value */
5554         lost = obd->obd_max_recoverable_clients - obd->obd_connected_clients;
5555         mdt_seq_adjust(env, mdt, lost);
5556
5557         rc = ld->ld_ops->ldo_recovery_complete(env, ld);
5558 #ifdef HAVE_QUOTA_SUPPORT
5559         if (likely(obd->obd_stopping == 0))
5560                 next->md_ops->mdo_quota.mqo_recovery(env, next);
5561 #endif
5562         RETURN(rc);
5563 }
5564
5565 int mdt_obd_postrecov(struct obd_device *obd)
5566 {
5567         struct lu_env env;
5568         int rc;
5569
5570         rc = lu_env_init(&env, LCT_MD_THREAD);
5571         if (rc)
5572                 RETURN(rc);
5573         rc = mdt_postrecov(&env, mdt_dev(obd->obd_lu_dev));
5574         lu_env_fini(&env);
5575         return rc;
5576 }
5577
5578 /**
5579  * Send a copytool req to a client
5580  * Note this sends a request RPC from a server (MDT) to a client (MDC),
5581  * backwards of normal comms.
5582  */
5583 int mdt_hsm_copytool_send(struct obd_export *exp)
5584 {
5585         struct lnl_hdr *lh;
5586         struct hsm_action_list *hal;
5587         struct hsm_action_item *hai;
5588         int rc, len;
5589         ENTRY;
5590
5591         CWARN("%s: writing to mdc at %s\n", exp->exp_obd->obd_name,
5592               libcfs_nid2str(exp->exp_connection->c_peer.nid));
5593
5594         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
5595                 /* for mockup below */ 2 * size_round(sizeof(*hai));
5596         OBD_ALLOC(lh, len);
5597         if (lh == NULL)
5598                 RETURN(-ENOMEM);
5599
5600         lh->lnl_magic = LNL_MAGIC;
5601         lh->lnl_transport = LNL_TRANSPORT_HSM;
5602         lh->lnl_msgtype = HMT_ACTION_LIST;
5603         lh->lnl_msglen = len;
5604
5605         hal = (struct hsm_action_list *)(lh + 1);
5606         hal->hal_version = HAL_VERSION;
5607         hal->hal_archive_num = 1;
5608         obd_uuid2fsname(hal->hal_fsname, exp->exp_obd->obd_name,
5609                         MTI_NAME_MAXLEN);
5610
5611         /* mock up an action list */
5612         hal->hal_count = 2;
5613         hai = hai_zero(hal);
5614         hai->hai_action = HSMA_ARCHIVE;
5615         hai->hai_fid.f_oid = 0xA00A;
5616         hai->hai_len = sizeof(*hai);
5617         hai = hai_next(hai);
5618         hai->hai_action = HSMA_RESTORE;
5619         hai->hai_fid.f_oid = 0xB00B;
5620         hai->hai_len = sizeof(*hai);
5621
5622         /* Uses the ldlm reverse import; this rpc will be seen by
5623           the ldlm_callback_handler */
5624         rc = target_set_info_rpc(exp->exp_imp_reverse, LDLM_SET_INFO,
5625                                  sizeof(KEY_HSM_COPYTOOL_SEND),
5626                                  KEY_HSM_COPYTOOL_SEND,
5627                                  len, lh, NULL);
5628
5629         OBD_FREE(lh, len);
5630
5631         RETURN(rc);
5632 }
5633
5634 static struct obd_ops mdt_obd_device_ops = {
5635         .o_owner          = THIS_MODULE,
5636         .o_set_info_async = mdt_obd_set_info_async,
5637         .o_connect        = mdt_obd_connect,
5638         .o_reconnect      = mdt_obd_reconnect,
5639         .o_disconnect     = mdt_obd_disconnect,
5640         .o_init_export    = mdt_init_export,
5641         .o_destroy_export = mdt_destroy_export,
5642         .o_iocontrol      = mdt_iocontrol,
5643         .o_postrecov      = mdt_obd_postrecov,
5644         .o_notify         = mdt_obd_notify
5645 };
5646
5647 static struct lu_device* mdt_device_fini(const struct lu_env *env,
5648                                          struct lu_device *d)
5649 {
5650         struct mdt_device *m = mdt_dev(d);
5651         ENTRY;
5652
5653         mdt_fini(env, m);
5654         RETURN(NULL);
5655 }
5656
5657 static struct lu_device *mdt_device_free(const struct lu_env *env,
5658                                          struct lu_device *d)
5659 {
5660         struct mdt_device *m = mdt_dev(d);
5661         ENTRY;
5662
5663         md_device_fini(&m->mdt_md_dev);
5664         OBD_FREE_PTR(m);
5665         RETURN(NULL);
5666 }
5667
5668 static struct lu_device *mdt_device_alloc(const struct lu_env *env,
5669                                           struct lu_device_type *t,
5670                                           struct lustre_cfg *cfg)
5671 {
5672         struct lu_device  *l;
5673         struct mdt_device *m;
5674
5675         OBD_ALLOC_PTR(m);
5676         if (m != NULL) {
5677                 int rc;
5678
5679                 l = &m->mdt_md_dev.md_lu_dev;
5680                 rc = mdt_init0(env, m, t, cfg);
5681                 if (rc != 0) {
5682                         mdt_device_free(env, l);
5683                         l = ERR_PTR(rc);
5684                         return l;
5685                 }
5686                 md_upcall_init(&m->mdt_md_dev, mdt_upcall);
5687         } else
5688                 l = ERR_PTR(-ENOMEM);
5689         return l;
5690 }
5691
5692 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
5693 LU_KEY_INIT_FINI(mdt, struct mdt_thread_info);
5694
5695 /* context key: mdt_thread_key */
5696 LU_CONTEXT_KEY_DEFINE(mdt, LCT_MD_THREAD);
5697
5698 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
5699 LU_KEY_INIT_FINI(mdt_txn, struct mdt_txn_info);
5700
5701 struct lu_context_key mdt_txn_key = {
5702         .lct_tags = LCT_TX_HANDLE,
5703         .lct_init = mdt_txn_key_init,
5704         .lct_fini = mdt_txn_key_fini
5705 };
5706
5707 struct md_ucred *mdt_ucred(const struct mdt_thread_info *info)
5708 {
5709         return md_ucred(info->mti_env);
5710 }
5711
5712 /**
5713  * Enable/disable COS (Commit On Sharing).
5714  *
5715  * Set/Clear the COS flag in mdt options.
5716  *
5717  * \param mdt mdt device
5718  * \param val 0 disables COS, other values enable COS
5719  */
5720 void mdt_enable_cos(struct mdt_device *mdt, int val)
5721 {
5722         struct lu_env env;
5723         int rc;
5724
5725         mdt->mdt_opts.mo_cos = !!val;
5726         rc = lu_env_init(&env, LCT_MD_THREAD);
5727         if (unlikely(rc != 0)) {
5728                 CWARN("lu_env initialization failed with rc = %d,"
5729                       "cannot sync\n", rc);
5730                 return;
5731         }
5732         mdt_device_sync(&env, mdt);
5733         lu_env_fini(&env);
5734 }
5735
5736 /**
5737  * Check COS (Commit On Sharing) status.
5738  *
5739  * Return COS flag status.
5740  *
5741  * \param mdt mdt device
5742  */
5743 int mdt_cos_is_enabled(struct mdt_device *mdt)
5744 {
5745         return mdt->mdt_opts.mo_cos != 0;
5746 }
5747
5748 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
5749 LU_TYPE_INIT_FINI(mdt, &mdt_thread_key, &mdt_txn_key);
5750
5751 static struct lu_device_type_operations mdt_device_type_ops = {
5752         .ldto_init = mdt_type_init,
5753         .ldto_fini = mdt_type_fini,
5754
5755         .ldto_start = mdt_type_start,
5756         .ldto_stop  = mdt_type_stop,
5757
5758         .ldto_device_alloc = mdt_device_alloc,
5759         .ldto_device_free  = mdt_device_free,
5760         .ldto_device_fini  = mdt_device_fini
5761 };
5762
5763 static struct lu_device_type mdt_device_type = {
5764         .ldt_tags     = LU_DEVICE_MD,
5765         .ldt_name     = LUSTRE_MDT_NAME,
5766         .ldt_ops      = &mdt_device_type_ops,
5767         .ldt_ctx_tags = LCT_MD_THREAD
5768 };
5769
5770 static struct lu_local_obj_desc mdt_last_recv = {
5771         .llod_name      = LAST_RCVD,
5772         .llod_oid       = MDT_LAST_RECV_OID,
5773         .llod_is_index  = 0,
5774 };
5775
5776 static int __init mdt_mod_init(void)
5777 {
5778         struct lprocfs_static_vars lvars;
5779         int rc;
5780
5781         llo_local_obj_register(&mdt_last_recv);
5782
5783         mdt_num_threads = MDT_NUM_THREADS;
5784         lprocfs_mdt_init_vars(&lvars);
5785         rc = class_register_type(&mdt_obd_device_ops, NULL,
5786                                  lvars.module_vars, LUSTRE_MDT_NAME,
5787                                  &mdt_device_type);
5788
5789         return rc;
5790 }
5791
5792 static void __exit mdt_mod_exit(void)
5793 {
5794         llo_local_obj_unregister(&mdt_last_recv);
5795         class_unregister_type(LUSTRE_MDT_NAME);
5796 }
5797
5798
5799 #define DEF_HNDL(prefix, base, suffix, flags, opc, fn, fmt)             \
5800 [prefix ## _ ## opc - prefix ## _ ## base] = {                          \
5801         .mh_name    = #opc,                                             \
5802         .mh_fail_id = OBD_FAIL_ ## prefix ## _  ## opc ## suffix,       \
5803         .mh_opc     = prefix ## _  ## opc,                              \
5804         .mh_flags   = flags,                                            \
5805         .mh_act     = fn,                                               \
5806         .mh_fmt     = fmt                                               \
5807 }
5808
5809 #define DEF_MDT_HNDL(flags, name, fn, fmt)                                  \
5810         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, fmt)
5811
5812 #define DEF_SEQ_HNDL(flags, name, fn, fmt)                      \
5813         DEF_HNDL(SEQ, QUERY, _NET, flags, name, fn, fmt)
5814
5815 #define DEF_FLD_HNDL(flags, name, fn, fmt)                      \
5816         DEF_HNDL(FLD, QUERY, _NET, flags, name, fn, fmt)
5817 /*
5818  * Request with a format known in advance
5819  */
5820 #define DEF_MDT_HNDL_F(flags, name, fn)                                 \
5821         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, &RQF_MDS_ ## name)
5822
5823 #define DEF_SEQ_HNDL_F(flags, name, fn)                                 \
5824         DEF_HNDL(SEQ, QUERY, _NET, flags, name, fn, &RQF_SEQ_ ## name)
5825
5826 #define DEF_FLD_HNDL_F(flags, name, fn)                                 \
5827         DEF_HNDL(FLD, QUERY, _NET, flags, name, fn, &RQF_FLD_ ## name)
5828 /*
5829  * Request with a format we do not yet know
5830  */
5831 #define DEF_MDT_HNDL_0(flags, name, fn)                                 \
5832         DEF_HNDL(MDS, GETATTR, _NET, flags, name, fn, NULL)
5833
5834 static struct mdt_handler mdt_mds_ops[] = {
5835 DEF_MDT_HNDL_F(0,                         CONNECT,      mdt_connect),
5836 DEF_MDT_HNDL_F(0,                         DISCONNECT,   mdt_disconnect),
5837 DEF_MDT_HNDL  (0,                         SET_INFO,     mdt_set_info,
5838                                                              &RQF_OBD_SET_INFO),
5839 DEF_MDT_HNDL_F(0,                         GET_INFO,     mdt_get_info),
5840 DEF_MDT_HNDL_F(0           |HABEO_REFERO, GETSTATUS,    mdt_getstatus),
5841 DEF_MDT_HNDL_F(HABEO_CORPUS,              GETATTR,      mdt_getattr),
5842 DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, GETATTR_NAME, mdt_getattr_name),
5843 DEF_MDT_HNDL_F(HABEO_CORPUS,              GETXATTR,     mdt_getxattr),
5844 DEF_MDT_HNDL_F(0           |HABEO_REFERO, STATFS,       mdt_statfs),
5845 DEF_MDT_HNDL_F(0           |MUTABOR,      REINT,        mdt_reint),
5846 DEF_MDT_HNDL_F(HABEO_CORPUS,              CLOSE,        mdt_close),
5847 DEF_MDT_HNDL_F(HABEO_CORPUS,              DONE_WRITING, mdt_done_writing),
5848 DEF_MDT_HNDL_F(0           |HABEO_REFERO, PIN,          mdt_pin),
5849 DEF_MDT_HNDL_0(0,                         SYNC,         mdt_sync),
5850 DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, IS_SUBDIR,    mdt_is_subdir),
5851 #ifdef HAVE_QUOTA_SUPPORT
5852 DEF_MDT_HNDL_F(0,                         QUOTACHECK,   mdt_quotacheck_handle),
5853 DEF_MDT_HNDL_F(0,                         QUOTACTL,     mdt_quotactl_handle)
5854 #endif
5855 };
5856
5857 #define DEF_OBD_HNDL(flags, name, fn)                   \
5858         DEF_HNDL(OBD, PING, _NET, flags, name, fn, NULL)
5859
5860
5861 static struct mdt_handler mdt_obd_ops[] = {
5862         DEF_OBD_HNDL(0, PING,           mdt_obd_ping),
5863         DEF_OBD_HNDL(0, LOG_CANCEL,     mdt_obd_log_cancel),
5864         DEF_OBD_HNDL(0, QC_CALLBACK,    mdt_obd_qc_callback)
5865 };
5866
5867 #define DEF_DLM_HNDL_0(flags, name, fn)                   \
5868         DEF_HNDL(LDLM, ENQUEUE, , flags, name, fn, NULL)
5869 #define DEF_DLM_HNDL_F(flags, name, fn)                   \
5870         DEF_HNDL(LDLM, ENQUEUE, , flags, name, fn, &RQF_LDLM_ ## name)
5871
5872 static struct mdt_handler mdt_dlm_ops[] = {
5873         DEF_DLM_HNDL_F(HABEO_CLAVIS, ENQUEUE,        mdt_enqueue),
5874         DEF_DLM_HNDL_0(HABEO_CLAVIS, CONVERT,        mdt_convert),
5875         DEF_DLM_HNDL_0(0,            BL_CALLBACK,    mdt_bl_callback),
5876         DEF_DLM_HNDL_0(0,            CP_CALLBACK,    mdt_cp_callback)
5877 };
5878
5879 #define DEF_LLOG_HNDL(flags, name, fn)                   \
5880         DEF_HNDL(LLOG, ORIGIN_HANDLE_CREATE, _NET, flags, name, fn, NULL)
5881
5882 static struct mdt_handler mdt_llog_ops[] = {
5883         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_CREATE,      mdt_llog_create),
5884         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_NEXT_BLOCK,  mdt_llog_next_block),
5885         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_READ_HEADER, mdt_llog_read_header),
5886         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_WRITE_REC,   NULL),
5887         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_CLOSE,       NULL),
5888         DEF_LLOG_HNDL(0, ORIGIN_CONNECT,            NULL),
5889         DEF_LLOG_HNDL(0, CATINFO,                   NULL),
5890         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_PREV_BLOCK,  mdt_llog_prev_block),
5891         DEF_LLOG_HNDL(0, ORIGIN_HANDLE_DESTROY,     mdt_llog_destroy),
5892 };
5893
5894 #define DEF_SEC_CTX_HNDL(name, fn)                      \
5895         DEF_HNDL(SEC_CTX, INIT, _NET, 0, name, fn, NULL)
5896
5897 static struct mdt_handler mdt_sec_ctx_ops[] = {
5898         DEF_SEC_CTX_HNDL(INIT,          mdt_sec_ctx_handle),
5899         DEF_SEC_CTX_HNDL(INIT_CONT,     mdt_sec_ctx_handle),
5900         DEF_SEC_CTX_HNDL(FINI,          mdt_sec_ctx_handle)
5901 };
5902
5903 static struct mdt_opc_slice mdt_regular_handlers[] = {
5904         {
5905                 .mos_opc_start = MDS_GETATTR,
5906                 .mos_opc_end   = MDS_LAST_OPC,
5907                 .mos_hs        = mdt_mds_ops
5908         },
5909         {
5910                 .mos_opc_start = OBD_PING,
5911                 .mos_opc_end   = OBD_LAST_OPC,
5912                 .mos_hs        = mdt_obd_ops
5913         },
5914         {
5915                 .mos_opc_start = LDLM_ENQUEUE,
5916                 .mos_opc_end   = LDLM_LAST_OPC,
5917                 .mos_hs        = mdt_dlm_ops
5918         },
5919         {
5920                 .mos_opc_start = LLOG_ORIGIN_HANDLE_CREATE,
5921                 .mos_opc_end   = LLOG_LAST_OPC,
5922                 .mos_hs        = mdt_llog_ops
5923         },
5924         {
5925                 .mos_opc_start = SEC_CTX_INIT,
5926                 .mos_opc_end   = SEC_LAST_OPC,
5927                 .mos_hs        = mdt_sec_ctx_ops
5928         },
5929         {
5930                 .mos_hs        = NULL
5931         }
5932 };
5933
5934 static struct mdt_handler mdt_readpage_ops[] = {
5935         DEF_MDT_HNDL_F(0,                         CONNECT,  mdt_connect),
5936         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, READPAGE, mdt_readpage),
5937 #ifdef HAVE_SPLIT_SUPPORT
5938         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, WRITEPAGE, mdt_writepage),
5939 #endif
5940
5941         /*
5942          * XXX: this is ugly and should be fixed one day, see mdc_close() for
5943          * detailed comments. --umka
5944          */
5945         DEF_MDT_HNDL_F(HABEO_CORPUS,              CLOSE,    mdt_close),
5946         DEF_MDT_HNDL_F(HABEO_CORPUS,              DONE_WRITING,    mdt_done_writing),
5947 };
5948
5949 static struct mdt_opc_slice mdt_readpage_handlers[] = {
5950         {
5951                 .mos_opc_start = MDS_GETATTR,
5952                 .mos_opc_end   = MDS_LAST_OPC,
5953                 .mos_hs        = mdt_readpage_ops
5954         },
5955         {
5956                 .mos_hs        = NULL
5957         }
5958 };
5959
5960 static struct mdt_handler mdt_xmds_ops[] = {
5961         DEF_MDT_HNDL_F(0,                         CONNECT,      mdt_connect),
5962         DEF_MDT_HNDL_F(HABEO_CORPUS             , GETATTR,      mdt_getattr),
5963         DEF_MDT_HNDL_F(0 | MUTABOR              , REINT,        mdt_reint),
5964         DEF_MDT_HNDL_F(HABEO_CORPUS|HABEO_REFERO, IS_SUBDIR,    mdt_is_subdir),
5965 };
5966
5967 static struct mdt_opc_slice mdt_xmds_handlers[] = {
5968         {
5969                 .mos_opc_start = MDS_GETATTR,
5970                 .mos_opc_end   = MDS_LAST_OPC,
5971                 .mos_hs        = mdt_xmds_ops
5972         },
5973         {
5974                 .mos_opc_start = OBD_PING,
5975                 .mos_opc_end   = OBD_LAST_OPC,
5976                 .mos_hs        = mdt_obd_ops
5977         },
5978         {
5979                 .mos_opc_start = SEC_CTX_INIT,
5980                 .mos_opc_end   = SEC_LAST_OPC,
5981                 .mos_hs        = mdt_sec_ctx_ops
5982         },
5983         {
5984                 .mos_hs        = NULL
5985         }
5986 };
5987
5988 static struct mdt_handler mdt_seq_ops[] = {
5989         DEF_SEQ_HNDL_F(0, QUERY, (int (*)(struct mdt_thread_info *))seq_query)
5990 };
5991
5992 static struct mdt_opc_slice mdt_seq_handlers[] = {
5993         {
5994                 .mos_opc_start = SEQ_QUERY,
5995                 .mos_opc_end   = SEQ_LAST_OPC,
5996                 .mos_hs        = mdt_seq_ops
5997         },
5998         {
5999                 .mos_hs        = NULL
6000         }
6001 };
6002
6003 static struct mdt_handler mdt_fld_ops[] = {
6004         DEF_FLD_HNDL_F(0, QUERY, (int (*)(struct mdt_thread_info *))fld_query)
6005 };
6006
6007 static struct mdt_opc_slice mdt_fld_handlers[] = {
6008         {
6009                 .mos_opc_start = FLD_QUERY,
6010                 .mos_opc_end   = FLD_LAST_OPC,
6011                 .mos_hs        = mdt_fld_ops
6012         },
6013         {
6014                 .mos_hs        = NULL
6015         }
6016 };
6017
6018 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6019 MODULE_DESCRIPTION("Lustre Meta-data Target ("LUSTRE_MDT_NAME")");
6020 MODULE_LICENSE("GPL");
6021
6022 CFS_MODULE_PARM(mdt_num_threads, "ul", ulong, 0444,
6023                 "number of mdt service threads to start");
6024
6025 cfs_module(mdt, "0.2.0", mdt_mod_init, mdt_mod_exit);