lustre/mds/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/mds/handler.c
  37  *
  38  * Author: Peter Braam <braam@clusterfs.com>
  39  * Author: Andreas Dilger <adilger@clusterfs.com>
  40  * Author: Phil Schwan <phil@clusterfs.com>
  41  * Author: Mike Shaver <shaver@clusterfs.com>
  42  */
  43
  44 #ifndef EXPORT_SYMTAB
  45 # define EXPORT_SYMTAB
  46 #endif
  47 #define DEBUG_SUBSYSTEM S_MDS
  48
  49 #include <lustre_mds.h>
  50 #include <linux/module.h>
  51 #include <linux/init.h>
  52 #include <linux/random.h>
  53 #include <linux/fs.h>
  54 #include <linux/jbd.h>
  55 # include <linux/smp_lock.h>
  56 # include <linux/buffer_head.h>
  57 # include <linux/workqueue.h>
  58 # include <linux/mount.h>
  59
  60 #include <obd_class.h>
  61 #include <lustre_dlm.h>
  62 #include <obd_lov.h>
  63 #include <lustre_fsfilt.h>
  64 #include <lprocfs_status.h>
  65 #include <lustre_quota.h>
  66 #include <lustre_disk.h>
  67 #include <lustre_param.h>
  68
  69 #include "mds_internal.h"
  70
  71 int mds_num_threads;
  72 CFS_MODULE_PARM(mds_num_threads, "i", int, 0444,
  73                 "number of MDS service threads to start");
  74
  75 static int mds_intent_policy(struct ldlm_namespace *ns,
  76                              struct ldlm_lock **lockp, void *req_cookie,
  77                              ldlm_mode_t mode, int flags, void *data);
  78 static int mds_postsetup(struct obd_device *obd);
  79 static int mds_cleanup(struct obd_device *obd);
  80
  81 /* Assumes caller has already pushed into the kernel filesystem context */
  82 static int mds_sendpage(struct ptlrpc_request *req, struct file *file,
  83                         loff_t offset, int count)
  84 {
  85         struct ptlrpc_bulk_desc *desc;
  86         struct obd_export *exp = req->rq_export;
  87         struct l_wait_info lwi;
  88         struct page **pages;
  89         int timeout;
  90         int rc = 0, npages, i, tmpcount, tmpsize = 0;
  91         ENTRY;
  92
  93         LASSERT((offset & ~CFS_PAGE_MASK) == 0); /* I'm dubious about this */
  94
  95         npages = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
  96         OBD_ALLOC(pages, sizeof(*pages) * npages);
  97         if (!pages)
  98                 GOTO(out, rc = -ENOMEM);
  99
 100         desc = ptlrpc_prep_bulk_exp(req, npages, BULK_PUT_SOURCE,
 101                                     MDS_BULK_PORTAL);
 102         if (desc == NULL)
 103                 GOTO(out_free, rc = -ENOMEM);
 104
 105         for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
 106                 tmpsize = tmpcount > CFS_PAGE_SIZE ? CFS_PAGE_SIZE : tmpcount;
 107
 108                 OBD_PAGE_ALLOC(pages[i], CFS_ALLOC_STD);
 109                 if (pages[i] == NULL)
 110                         GOTO(cleanup_buf, rc = -ENOMEM);
 111
 112                 ptlrpc_prep_bulk_page(desc, pages[i], 0, tmpsize);
 113         }
 114
 115         for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
 116                 tmpsize = tmpcount > CFS_PAGE_SIZE ? CFS_PAGE_SIZE : tmpcount;
 117                 CDEBUG(D_EXT2, "reading %u@%llu from dir %lu (size %llu)\n",
 118                        tmpsize, offset, file->f_dentry->d_inode->i_ino,
 119                        i_size_read(file->f_dentry->d_inode));
 120
 121                 rc = fsfilt_readpage(exp->exp_obd, file,
 122                                      kmap(pages[i]), tmpsize, &offset);
 123                 kunmap(pages[i]);
 124
 125                 if (rc != tmpsize)
 126                         GOTO(cleanup_buf, rc = -EIO);
 127         }
 128
 129         LASSERT(desc->bd_nob == count);
 130
 131         rc = ptlrpc_start_bulk_transfer(desc);
 132         if (rc)
 133                 GOTO(cleanup_buf, rc);
 134
 135         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
 136                 CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
 137                        OBD_FAIL_MDS_SENDPAGE, rc);
 138                 GOTO(abort_bulk, rc);
 139         }
 140
 141         timeout = (int)req->rq_deadline - (int)cfs_time_current_sec();
 142         if (timeout < 0) {
 143                 CERROR("Req deadline already passed %lu (now: %lu)\n",
 144                        req->rq_deadline, cfs_time_current_sec());
 145         }
 146         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(max(timeout, 1)),
 147                                    cfs_time_seconds(1), NULL, NULL);
 148         rc = l_wait_event(desc->bd_waitq, !ptlrpc_server_bulk_active(desc) ||
 149                           exp->exp_failed || exp->exp_abort_active_req, &lwi);
 150         LASSERT (rc == 0 || rc == -ETIMEDOUT);
 151
 152         if (rc == 0) {
 153                 if (desc->bd_success &&
 154                     desc->bd_nob_transferred == count)
 155                         GOTO(cleanup_buf, rc);
 156                 rc = -ETIMEDOUT;
 157                 if (exp->exp_abort_active_req || exp->exp_failed)
 158                         GOTO(abort_bulk, rc);
 159         }
 160
 161         DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s\n",
 162                   (rc == -ETIMEDOUT) ? "timeout" : "network error",
 163                   desc->bd_nob_transferred, count,
 164                   req->rq_export->exp_client_uuid.uuid,
 165                   req->rq_export->exp_connection->c_remote_uuid.uuid);
 166
 167         class_fail_export(req->rq_export);
 168
 169         EXIT;
 170  abort_bulk:
 171         ptlrpc_abort_bulk(desc);
 172  cleanup_buf:
 173         for (i = 0; i < npages; i++)
 174                 if (pages[i])
 175                         OBD_PAGE_FREE(pages[i]);
 176
 177         ptlrpc_free_bulk(desc);
 178  out_free:
 179         OBD_FREE(pages, sizeof(*pages) * npages);
 180  out:
 181         return rc;
 182 }
 183
 184 /* only valid locked dentries or errors should be returned */
 185 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
 186                                      struct vfsmount **mnt, int lock_mode,
 187                                      struct lustre_handle *lockh,
 188                                      char *name, int namelen, __u64 lockpart)
 189 {
 190         struct mds_obd *mds = &obd->u.mds;
 191         struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
 192         struct ldlm_res_id res_id = { .name = {0} };
 193         int flags = LDLM_FL_ATOMIC_CB, rc;
 194         ldlm_policy_data_t policy = { .l_inodebits = { lockpart} };
 195         ENTRY;
 196
 197         if (IS_ERR(de))
 198                 RETURN(de);
 199
 200         res_id.name[0] = de->d_inode->i_ino;
 201         res_id.name[1] = de->d_inode->i_generation;
 202         rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id,
 203                                     LDLM_IBITS, &policy, lock_mode, &flags,
 204                                     ldlm_blocking_ast, ldlm_completion_ast,
 205                                     NULL, NULL, 0, NULL, lockh);
 206         if (rc != ELDLM_OK) {
 207                 l_dput(de);
 208                 retval = ERR_PTR(-EIO); /* XXX translate ldlm code */
 209         }
 210
 211         RETURN(retval);
 212 }
 213
 214 /* Look up an entry by inode number. */
 215 /* this function ONLY returns valid dget'd dentries with an initialized inode
 216    or errors */
 217 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
 218                               struct vfsmount **mnt)
 219 {
 220         struct obd_device *obd = container_of(mds, struct obd_device, u.mds);
 221         char fid_name[32];
 222         unsigned long ino = fid->id;
 223         __u32 generation = fid->generation;
 224         struct inode *inode;
 225         struct dentry *result;
 226
 227         if (ino == 0)
 228                 RETURN(ERR_PTR(-ESTALE));
 229
 230         snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
 231
 232         CDEBUG(D_DENTRY, "--> mds_fid2dentry: ino/gen %lu/%u, sb %p\n",
 233                ino, generation, mds->mds_obt.obt_sb);
 234
 235         /* under ext3 this is neither supposed to return bad inodes
 236            nor NULL inodes. */
 237         result = mds_lookup(obd, fid_name, mds->mds_fid_de, strlen(fid_name));
 238         if (IS_ERR(result))
 239                 RETURN(result);
 240
 241         inode = result->d_inode;
 242         if (!inode)
 243                 RETURN(ERR_PTR(-ENOENT));
 244
 245        if (inode->i_nlink == 0) {
 246                 if (inode->i_mode == 0 &&
 247                     LTIME_S(inode->i_ctime) == 0 ) {
 248                         LCONSOLE_WARN("Found inode with zero nlink, mode and "
 249                                       "ctime -- this may indicate disk"
 250                                       "corruption (device %s, inode %lu, link:"
 251                                       " %lu, count: %d)\n", obd->obd_name, inode->i_ino,
 252                                       (unsigned long)inode->i_nlink,
 253                                       atomic_read(&inode->i_count));
 254                 }
 255                 dput(result);
 256                 RETURN(ERR_PTR(-ENOENT));
 257         }
 258
 259         if (generation && inode->i_generation != generation) {
 260                 /* we didn't find the right inode.. */
 261                 CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
 262                        "count: %d, generation %u/%u\n", inode->i_ino,
 263                        (unsigned long)inode->i_nlink,
 264                        atomic_read(&inode->i_count), inode->i_generation,
 265                        generation);
 266                 dput(result);
 267                 RETURN(ERR_PTR(-ENOENT));
 268         }
 269
 270         if (mnt) {
 271                 *mnt = mds->mds_vfsmnt;
 272                 mntget(*mnt);
 273         }
 274
 275         RETURN(result);
 276 }
 277
 278 static int mds_connect_internal(struct obd_export *exp,
 279                                 struct obd_connect_data *data)
 280 {
 281         struct obd_device *obd = exp->exp_obd;
 282         if (data != NULL) {
 283                 data->ocd_connect_flags &= MDS_CONNECT_SUPPORTED;
 284                 data->ocd_ibits_known &= MDS_INODELOCK_FULL;
 285
 286                 /* If no known bits (which should not happen, probably,
 287                    as everybody should support LOOKUP and UPDATE bits at least)
 288                    revert to compat mode with plain locks. */
 289                 if (!data->ocd_ibits_known &&
 290                     data->ocd_connect_flags & OBD_CONNECT_IBITS)
 291                         data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
 292
 293                 if (!obd->u.mds.mds_fl_acl)
 294                         data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
 295
 296                 if (!obd->u.mds.mds_fl_user_xattr)
 297                         data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
 298
 299                 exp->exp_connect_flags = data->ocd_connect_flags;
 300                 data->ocd_version = LUSTRE_VERSION_CODE;
 301                 exp->exp_mds_data.med_ibits_known = data->ocd_ibits_known;
 302         }
 303
 304         if (obd->u.mds.mds_fl_acl &&
 305             ((exp->exp_connect_flags & OBD_CONNECT_ACL) == 0)) {
 306                 CWARN("%s: MDS requires ACL support but client does not\n",
 307                       obd->obd_name);
 308                 return -EBADE;
 309         }
 310         return 0;
 311 }
 312
 313 static int mds_reconnect(struct obd_export *exp, struct obd_device *obd,
 314                          struct obd_uuid *cluuid,
 315                          struct obd_connect_data *data,
 316                          void *localdata)
 317 {
 318         int rc;
 319         ENTRY;
 320
 321         if (exp == NULL || obd == NULL || cluuid == NULL)
 322                 RETURN(-EINVAL);
 323
 324         rc = mds_connect_internal(exp, data);
 325         if (rc == 0)
 326                 mds_export_stats_init(obd, exp, 1, localdata);
 327
 328         RETURN(rc);
 329 }
 330
 331 /* Establish a connection to the MDS.
 332  *
 333  * This will set up an export structure for the client to hold state data
 334  * about that client, like open files, the last operation number it did
 335  * on the server, etc.
 336  */
 337 static int mds_connect(struct lustre_handle *conn, struct obd_device *obd,
 338                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 339                        void *localdata)
 340 {
 341         struct obd_export *exp;
 342         struct mds_export_data *med;
 343         struct lsd_client_data *lcd = NULL;
 344         int rc;
 345         ENTRY;
 346
 347         if (!conn || !obd || !cluuid)
 348                 RETURN(-EINVAL);
 349
 350         /* Check for aborted recovery. */
 351         target_recovery_check_and_stop(obd);
 352
 353         /* XXX There is a small race between checking the list and adding a
 354          * new connection for the same UUID, but the real threat (list
 355          * corruption when multiple different clients connect) is solved.
 356          *
 357          * There is a second race between adding the export to the list,
 358          * and filling in the client data below.  Hence skipping the case
 359          * of NULL lcd above.  We should already be controlling multiple
 360          * connects at the client, and we can't hold the spinlock over
 361          * memory allocations without risk of deadlocking.
 362          */
 363         rc = class_connect(conn, obd, cluuid);
 364         if (rc)
 365                 RETURN(rc);
 366         exp = class_conn2export(conn);
 367         LASSERT(exp);
 368         med = &exp->exp_mds_data;
 369
 370         rc = mds_connect_internal(exp, data);
 371         if (rc)
 372                 GOTO(out, rc);
 373
 374         OBD_ALLOC_PTR(lcd);
 375         if (!lcd)
 376                 GOTO(out, rc = -ENOMEM);
 377
 378         memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
 379         med->med_lcd = lcd;
 380
 381         rc = mds_client_add(obd, exp, -1, localdata);
 382         GOTO(out, rc);
 383
 384 out:
 385         if (rc) {
 386                 if (lcd) {
 387                         OBD_FREE_PTR(lcd);
 388                         med->med_lcd = NULL;
 389                 }
 390                 class_disconnect(exp);
 391                 /* release nid stat refererence */
 392                 lprocfs_exp_cleanup(exp);
 393         } else {
 394                 class_export_put(exp);
 395         }
 396
 397         RETURN(rc);
 398 }
 399
 400 int mds_init_export(struct obd_export *exp)
 401 {
 402         struct mds_export_data *med = &exp->exp_mds_data;
 403         ENTRY;
 404
 405         INIT_LIST_HEAD(&med->med_open_head);
 406         spin_lock_init(&med->med_open_lock);
 407
 408         spin_lock(&exp->exp_lock);
 409         exp->exp_connecting = 1;
 410         spin_unlock(&exp->exp_lock);
 411
 412         RETURN(ldlm_init_export(exp));
 413 }
 414
 415 static int mds_destroy_export(struct obd_export *exp)
 416 {
 417         ENTRY;
 418
 419         target_destroy_export(exp);
 420         ldlm_destroy_export(exp);
 421
 422         LASSERT(list_empty(&exp->exp_mds_data.med_open_head));
 423         mds_client_free(exp);
 424
 425         RETURN(0);
 426 }
 427
 428 static int mds_cleanup_mfd(struct obd_export *exp)
 429 {
 430         struct mds_export_data *med;
 431         struct obd_device *obd = exp->exp_obd;
 432         struct mds_obd *mds = &obd->u.mds;
 433         struct lvfs_run_ctxt saved;
 434         struct lov_mds_md *lmm;
 435         __u32 lmm_sz, cookie_sz;
 436         struct llog_cookie *logcookies;
 437         struct list_head closing_list;
 438         struct mds_file_data *mfd, *n;
 439         int rc = 0;
 440         ENTRY;
 441
 442         med = &exp->exp_mds_data;
 443
 444         spin_lock(&med->med_open_lock);
 445         if (list_empty(&med->med_open_head)) {
 446                 spin_unlock(&med->med_open_lock);
 447                 RETURN(0);
 448         }
 449
 450         CFS_INIT_LIST_HEAD(&closing_list);
 451         while (!list_empty(&med->med_open_head)) {
 452                 struct list_head *tmp = med->med_open_head.next;
 453                 struct mds_file_data *mfd =
 454                         list_entry(tmp, struct mds_file_data, mfd_list);
 455
 456                 /* Remove mfd handle so it can't be found again.
 457                  * We are consuming the mfd_list reference here. */
 458                 mds_mfd_unlink(mfd, 0);
 459                 list_add_tail(&mfd->mfd_list, &closing_list);
 460         }
 461         spin_unlock(&med->med_open_lock);
 462
 463         lmm_sz = mds->mds_max_mdsize;
 464         OBD_ALLOC(lmm, lmm_sz);
 465         if (lmm == NULL) {
 466                 CWARN("%s: allocation failure during cleanup; can not force "
 467                       "close file handles on this service.\n", obd->obd_name);
 468                 GOTO(out, rc = -ENOMEM);
 469         }
 470
 471         cookie_sz = mds->mds_max_cookiesize;
 472         OBD_ALLOC(logcookies, cookie_sz);
 473         if (logcookies == NULL) {
 474                 CWARN("%s: allocation failure during cleanup; can not force "
 475                       "close file handles on this service.\n", obd->obd_name);
 476                 OBD_FREE(lmm, lmm_sz);
 477                 GOTO(out, rc = -ENOMEM);
 478         }
 479
 480         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 481         /* Close any open files (which may also cause orphan unlinking). */
 482         list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
 483                 int lmm_size = lmm_sz;
 484                 umode_t mode = mfd->mfd_dentry->d_inode->i_mode;
 485                 __u64 valid = 0;
 486
 487                 /* If you change this message, be sure to update
 488                  * replay_single:test_46 */
 489                 CDEBUG(D_INODE|D_IOCTL, "%s: force closing file handle for "
 490                        "%.*s (ino %lu)\n", obd->obd_name,
 491                        mfd->mfd_dentry->d_name.len,mfd->mfd_dentry->d_name.name,
 492                        mfd->mfd_dentry->d_inode->i_ino);
 493
 494                 rc = mds_get_md(obd, mfd->mfd_dentry->d_inode, lmm,
 495                                 &lmm_size, 1, 0, 0);
 496                 if (rc < 0)
 497                         CWARN("mds_get_md failure, rc=%d\n", rc);
 498                 else
 499                         valid |= OBD_MD_FLEASIZE;
 500
 501                 /* child orphan sem protects orphan_dec_test and
 502                  * is_orphan race, mds_mfd_close drops it */
 503                 MDS_DOWN_WRITE_ORPHAN_SEM(mfd->mfd_dentry->d_inode);
 504
 505                 list_del_init(&mfd->mfd_list);
 506                 rc = mds_mfd_close(NULL, REQ_REC_OFF, obd, mfd,
 507                                    !(exp->exp_flags & OBD_OPT_FAILOVER),
 508                                    lmm, lmm_size, logcookies,
 509                                    mds->mds_max_cookiesize,
 510                                    &valid);
 511
 512                 if (rc)
 513                         CDEBUG(D_INODE|D_IOCTL, "Error closing file: %d\n", rc);
 514
 515                 if (valid & OBD_MD_FLCOOKIE) {
 516                         rc = mds_osc_destroy_orphan(obd, mode, lmm,
 517                                                     lmm_size, logcookies, 1);
 518                         if (rc < 0) {
 519                                 CDEBUG(D_INODE, "%s: destroy of orphan failed,"
 520                                        " rc = %d\n", obd->obd_name, rc);
 521                                 rc = 0;
 522                         }
 523                         valid &= ~OBD_MD_FLCOOKIE;
 524                 }
 525
 526         }
 527         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 528         OBD_FREE(logcookies, cookie_sz);
 529         OBD_FREE(lmm, lmm_sz);
 530 out:
 531         RETURN(rc);
 532 }
 533
 534 static int mds_disconnect(struct obd_export *exp)
 535 {
 536         int rc = 0;
 537         ENTRY;
 538
 539         LASSERT(exp);
 540         class_export_get(exp);
 541
 542         /* Disconnect early so that clients can't keep using export */
 543         rc = class_disconnect(exp);
 544         if (exp->exp_obd->obd_namespace != NULL)
 545                 ldlm_cancel_locks_for_export(exp);
 546
 547         /* release nid stat refererence */
 548         lprocfs_exp_cleanup(exp);
 549
 550         rc = mds_cleanup_mfd(exp);
 551
 552         class_export_put(exp);
 553         RETURN(rc);
 554 }
 555
 556 static int mds_getstatus(struct ptlrpc_request *req)
 557 {
 558         struct mds_obd *mds = mds_req2mds(req);
 559         struct mds_body *body;
 560         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
 561         ENTRY;
 562
 563         OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_PACK, req->rq_status = -ENOMEM);
 564         rc = lustre_pack_reply(req, 2, size, NULL);
 565         if (rc)
 566                 RETURN(req->rq_status = rc);
 567
 568         body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
 569         memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
 570
 571         /* the last_committed and last_xid fields are filled in for all
 572          * replies already - no need to do so here also.
 573          */
 574         RETURN(0);
 575 }
 576
 577 /* get the LOV EA from @inode and store it into @md.  It can be at most
 578  * @size bytes, and @size is updated with the actual EA size.
 579  * The EA size is also returned on success, and -ve errno on failure.
 580  * If there is no EA then 0 is returned. */
 581 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
 582                int *size, int lock, int flags,
 583                __u64 connect_flags)
 584 {
 585         int rc = 0;
 586         int lmm_size = 0;
 587
 588         if (lock)
 589                 LOCK_INODE_MUTEX(inode);
 590         rc = fsfilt_get_md(obd, inode, md, *size, "lov");
 591
 592         if (rc == 0 && flags == MDS_GETATTR)
 593                 rc = mds_get_default_md(obd, md, &lmm_size);
 594
 595         if (rc < 0) {
 596                 CERROR("Error %d reading eadata for ino %lu\n",
 597                        rc, inode->i_ino);
 598         } else if (rc > 0) {
 599                 lmm_size = rc;
 600                 rc = mds_convert_lov_ea(obd, inode, md, lmm_size,
 601                                         connect_flags);
 602
 603                 if (rc == 0) {
 604                         *size = lmm_size;
 605                         rc = lmm_size;
 606                 } else if (rc > 0) {
 607                         *size = rc;
 608                 }
 609         } else {
 610                 *size = 0;
 611         }
 612         if (lock)
 613                 UNLOCK_INODE_MUTEX(inode);
 614
 615         RETURN (rc);
 616 }
 617
 618
 619 /* Call with lock=1 if you want mds_pack_md to take the i_mutex.
 620  * Call with lock=0 if the caller has already taken the i_mutex. */
 621 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
 622                 struct mds_body *body, struct inode *inode, int lock, int flags,
 623                 __u64 connect_flags)
 624 {
 625         struct mds_obd *mds = &obd->u.mds;
 626         void *lmm;
 627         int lmm_size;
 628         int rc;
 629         ENTRY;
 630
 631         lmm = lustre_msg_buf(msg, offset, 0);
 632         if (lmm == NULL) {
 633                 /* Some problem with getting eadata when I sized the reply
 634                  * buffer... */
 635                 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
 636                        inode->i_ino);
 637                 RETURN(0);
 638         }
 639         /* if this replay request we should be silencely exist without fill md*/
 640         lmm_size = lustre_msg_buflen(msg, offset);
 641         if (lmm_size == 0)
 642                 RETURN(0);
 643
 644         /* I don't really like this, but it is a sanity check on the client
 645          * MD request.  However, if the client doesn't know how much space
 646          * to reserve for the MD, it shouldn't be bad to have too much space.
 647          */
 648         if (lmm_size > mds->mds_max_mdsize) {
 649                 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
 650                        inode->i_ino, lmm_size, mds->mds_max_mdsize);
 651                 // RETURN(-EINVAL);
 652         }
 653
 654         rc = mds_get_md(obd, inode, lmm, &lmm_size, lock, flags,
 655                         connect_flags);
 656         if (rc > 0) {
 657                 if (S_ISDIR(inode->i_mode))
 658                         body->valid |= OBD_MD_FLDIREA;
 659                 else
 660                         body->valid |= OBD_MD_FLEASIZE;
 661                 body->eadatasize = lmm_size;
 662                 rc = 0;
 663         }
 664
 665         RETURN(rc);
 666 }
 667
 668 #ifdef CONFIG_FS_POSIX_ACL
 669 static
 670 int mds_pack_posix_acl(struct inode *inode, struct lustre_msg *repmsg,
 671                        struct mds_body *repbody, int repoff)
 672 {
 673         struct dentry de = { .d_inode = inode };
 674         int buflen, rc;
 675         ENTRY;
 676
 677         LASSERT(repbody->aclsize == 0);
 678         LASSERT(lustre_msg_bufcount(repmsg) > repoff);
 679
 680         buflen = lustre_msg_buflen(repmsg, repoff);
 681         if (!buflen)
 682                 GOTO(out, 0);
 683
 684         if (!inode->i_op || !inode->i_op->getxattr)
 685                 GOTO(out, 0);
 686
 687         rc = inode->i_op->getxattr(&de, MDS_XATTR_NAME_ACL_ACCESS,
 688                                    lustre_msg_buf(repmsg, repoff, buflen),
 689                                    buflen);
 690         if (rc >= 0) {
 691                 repbody->aclsize = rc;
 692         } else if (rc != -ENODATA) {
 693                 CERROR("buflen %d, get acl: %d\n", buflen, rc);
 694                 RETURN(rc);
 695         }
 696         EXIT;
 697 out:
 698         repbody->valid |= OBD_MD_FLACL;
 699         return 0;
 700 }
 701 #else
 702 #define mds_pack_posix_acl(inode, repmsg, repbody, repoff) 0
 703 #endif
 704
 705 int mds_pack_acl(struct mds_export_data *med, struct inode *inode,
 706                  struct lustre_msg *repmsg, struct mds_body *repbody,
 707                  int repoff)
 708 {
 709         return mds_pack_posix_acl(inode, repmsg, repbody, repoff);
 710 }
 711
 712 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
 713                                 struct ptlrpc_request *req,
 714                                 struct mds_body *reqbody, int reply_off)
 715 {
 716         struct mds_body *body;
 717         struct inode *inode = dentry->d_inode;
 718         int rc = 0;
 719         int flags = 0;
 720         ENTRY;
 721
 722         if (inode == NULL)
 723                 RETURN(-ENOENT);
 724
 725         body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
 726         LASSERT(body != NULL);                 /* caller prepped reply */
 727
 728         body->flags = reqbody->flags; /* copy MDS_BFLAG_EXT_FLAGS if present */
 729         mds_pack_inode2body(body, inode);
 730         reply_off++;
 731
 732         if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
 733             (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
 734                 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR &&
 735                    ((S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))))
 736                         flags = MDS_GETATTR;
 737
 738                 rc = mds_pack_md(obd, req->rq_repmsg, reply_off, body,
 739                                  inode, 1, flags,
 740                                  req->rq_export->exp_connect_flags);
 741
 742                 /* If we have LOV EA data, the OST holds size, atime, mtime */
 743                 if (!(body->valid & OBD_MD_FLEASIZE) &&
 744                     !(body->valid & OBD_MD_FLDIREA))
 745                         body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 746                                         OBD_MD_FLATIME | OBD_MD_FLMTIME);
 747
 748                 reply_off++;
 749         } else if (S_ISLNK(inode->i_mode) &&
 750                    (reqbody->valid & OBD_MD_LINKNAME) != 0) {
 751                 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off, 0);
 752                 int len;
 753
 754                 LASSERT (symname != NULL);       /* caller prepped reply */
 755                 len = lustre_msg_buflen(req->rq_repmsg, reply_off);
 756
 757                 rc = inode->i_op->readlink(dentry, symname, len);
 758                 if (rc < 0) {
 759                         CERROR("readlink failed: %d\n", rc);
 760                 } else if (rc != len - 1) {
 761                         CERROR ("Unexpected readlink rc %d: expecting %d\n",
 762                                 rc, len - 1);
 763                         rc = -EINVAL;
 764                 } else {
 765                         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
 766                                 rc -= 2;
 767
 768                         CDEBUG(D_INODE, "read symlink dest %s\n", symname);
 769                         body->valid |= OBD_MD_LINKNAME;
 770                         body->eadatasize = rc + 1;
 771                         symname[rc] = 0;        /* NULL terminate */
 772                         rc = 0;
 773                 }
 774                 reply_off++;
 775         } else if (reqbody->valid == OBD_MD_FLFLAGS &&
 776                    reqbody->flags & MDS_BFLAG_EXT_FLAGS) {
 777                 int flags;
 778
 779                 /* We only return the full set of flags on ioctl, otherwise we
 780                  * get enough flags from the inode in mds_pack_inode2body(). */
 781                 rc = fsfilt_iocontrol(obd, dentry, FSFILT_IOC_GETFLAGS,
 782                                       (long)&flags);
 783                 if (rc == 0)
 784                         body->flags = flags | MDS_BFLAG_EXT_FLAGS;
 785         }
 786
 787         if (reqbody->valid & OBD_MD_FLMODEASIZE) {
 788                 struct mds_obd *mds = mds_req2mds(req);
 789                 body->max_cookiesize = mds->mds_max_cookiesize;
 790                 body->max_mdsize = mds->mds_max_mdsize;
 791                 body->valid |= OBD_MD_FLMODEASIZE;
 792         }
 793
 794         if (rc)
 795                 RETURN(rc);
 796
 797 #ifdef CONFIG_FS_POSIX_ACL
 798         if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
 799             (reqbody->valid & OBD_MD_FLACL)) {
 800                 rc = mds_pack_acl(&req->rq_export->exp_mds_data,
 801                                   inode, req->rq_repmsg,
 802                                   body, reply_off);
 803
 804                 if (body->aclsize)
 805                         reply_off++;
 806         }
 807 #endif
 808
 809         RETURN(rc);
 810 }
 811
 812 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
 813                                 int offset)
 814 {
 815         struct mds_obd *mds = mds_req2mds(req);
 816         struct mds_body *body;
 817         int rc, bufcount = REPLY_REC_OFF + 1;
 818         int size[4] = { sizeof(struct ptlrpc_body),
 819                         sizeof(*body) };
 820         ENTRY;
 821
 822         LASSERT(offset == REQ_REC_OFF); /* non-intent */
 823
 824         body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*body));
 825         LASSERT(body != NULL);                    /* checked by caller */
 826         LASSERT(lustre_req_swabbed(req, offset)); /* swabbed by caller */
 827
 828         if (body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) {
 829                 /* this will be shrinked to actual size before size */
 830                 if (S_ISREG(inode->i_mode) || (S_ISDIR(inode->i_mode)))
 831                         size[bufcount ++] = mds->mds_max_mdsize;
 832                 else
 833                         /* we not want LSM for specfial files */
 834                         body->valid &= ~(OBD_MD_FLEASIZE | OBD_MD_FLDIREA);
 835         } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
 836                 if (i_size_read(inode) > body->eadatasize)
 837                         CERROR("symlink size: %Lu, reply space: %d\n",
 838                                i_size_read(inode) + 1, body->eadatasize);
 839                 size[bufcount ++] = min_t(int, i_size_read(inode) + 1,
 840                                           body->eadatasize);
 841                 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
 842                        i_size_read(inode) + 1, body->eadatasize);
 843         }
 844 #ifdef CONFIG_FS_POSIX_ACL
 845         if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
 846             (body->valid & OBD_MD_FLACL)) {
 847                 size[bufcount ++] = LUSTRE_POSIX_ACL_MAX_SIZE;
 848         }
 849 #endif
 850
 851         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
 852                 CERROR("failed MDS_GETATTR_PACK test\n");
 853                 req->rq_status = -ENOMEM;
 854                 RETURN(-ENOMEM);
 855         }
 856
 857         rc = lustre_pack_reply(req, bufcount, size, NULL);
 858         if (rc) {
 859                 req->rq_status = rc;
 860                 RETURN(rc);
 861         }
 862
 863         RETURN(0);
 864 }
 865
 866 static int mds_getattr_lock(struct ptlrpc_request *req, int offset,
 867                             int child_part, struct lustre_handle *child_lockh)
 868 {
 869         struct obd_device *obd = req->rq_export->exp_obd;
 870         struct mds_obd *mds = &obd->u.mds;
 871         struct ldlm_reply *rep = NULL;
 872         struct lvfs_run_ctxt saved;
 873         struct mds_body *body;
 874         struct dentry *dparent = NULL, *dchild = NULL;
 875         struct lvfs_ucred uc = {NULL,};
 876         struct lustre_handle parent_lockh;
 877         int namesize;
 878         int rc = 0, cleanup_phase = 0, resent_req = 0;
 879         int rq_offset = offset;
 880         char *name;
 881         ENTRY;
 882
 883         LASSERT(!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME));
 884         LASSERT(offset == REQ_REC_OFF || offset == DLM_INTENT_REC_OFF);
 885         /* if requests were at offset 2, the getattr reply goes back at 1 */
 886         if (offset == DLM_INTENT_REC_OFF) {
 887                 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
 888                                      sizeof(*rep));
 889                 offset = DLM_REPLY_REC_OFF;
 890         }
 891
 892         /* Swab now, before anyone looks inside the request */
 893         body = lustre_swab_reqbuf(req, rq_offset, sizeof(*body),
 894                                   lustre_swab_mds_body);
 895         if (body == NULL) {
 896                 CERROR("Can't swab mds_body\n");
 897                 GOTO(cleanup_exit, rc = -EFAULT);
 898         }
 899
 900         lustre_set_req_swabbed(req, rq_offset + 1);
 901         name = lustre_msg_string(req->rq_reqmsg, rq_offset + 1, 0);
 902         if (name == NULL) {
 903                 CERROR("Can't unpack name\n");
 904                 GOTO(cleanup_exit, rc = -EFAULT);
 905         }
 906         namesize = lustre_msg_buflen(req->rq_reqmsg, rq_offset + 1);
 907         /* namesize less than 2 means we have empty name, probably came from
 908            revalidate by cfid, so no point in having name to be set */
 909         if (namesize <= 1)
 910                 name = NULL;
 911
 912         rc = mds_init_ucred(&uc, req, rq_offset);
 913         if (rc)
 914                 GOTO(cleanup, rc);
 915
 916
 917         push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
 918         cleanup_phase = 1; /* kernel context */
 919         ldlm_reply_set_disposition(rep, DISP_LOOKUP_EXECD);
 920
 921         /* FIXME: handle raw lookup */
 922 #if 0
 923         if (body->valid == OBD_MD_FLID) {
 924                 struct mds_body *mds_reply;
 925                 int size = sizeof(*mds_reply);
 926                 ino_t inum;
 927                 // The user requested ONLY the inode number, so do a raw lookup
 928                 rc = lustre_pack_reply(req, 1, &size, NULL);
 929                 if (rc) {
 930                         CERROR("out of memory\n");
 931                         GOTO(cleanup, rc);
 932                 }
 933
 934                 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
 935
 936                 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
 937                                            sizeof(*mds_reply));
 938                 mds_reply->fid1.id = inum;
 939                 mds_reply->valid = OBD_MD_FLID;
 940                 GOTO(cleanup, rc);
 941         }
 942 #endif
 943
 944         /* child_lockh() is only set in fixup_handle_for_resent_req()
 945          * if MSG_RESENT is set */
 946         if (lustre_handle_is_used(child_lockh)) {
 947                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
 948                 resent_req = 1;
 949         }
 950
 951         if (resent_req == 0) {
 952                 if (name) {
 953                         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout*2);
 954                         rc = mds_get_parent_child_locked(obd, &obd->u.mds,
 955                                                          &body->fid1,
 956                                                          &parent_lockh,
 957                                                          &dparent, LCK_CR,
 958                                                          MDS_INODELOCK_UPDATE,
 959                                                          name, namesize,
 960                                                          child_lockh, &dchild,
 961                                                          LCK_CR, child_part);
 962                 } else {
 963                         /* For revalidate by fid we always take UPDATE lock */
 964                         dchild = mds_fid2locked_dentry(obd, &body->fid2, NULL,
 965                                                        LCK_CR, child_lockh,
 966                                                        NULL, 0, child_part);
 967                         LASSERT(dchild);
 968                         if (IS_ERR(dchild))
 969                                 rc = PTR_ERR(dchild);
 970                 }
 971                 if (rc)
 972                         GOTO(cleanup, rc);
 973         } else {
 974                 struct ldlm_lock *granted_lock;
 975                 struct ll_fid child_fid;
 976                 struct ldlm_resource *res;
 977                 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
 978                 granted_lock = ldlm_handle2lock(child_lockh);
 979                 /* lock was granted in fixup_handle_for_resent_req() if
 980                  * MSG_RESENT is set */
 981                 LASSERTF(granted_lock != NULL, LPU64"/%u lockh "LPX64"\n",
 982                          body->fid1.id, body->fid1.generation,
 983                          child_lockh->cookie);
 984
 985
 986                 res = granted_lock->l_resource;
 987                 child_fid.id = res->lr_name.name[0];
 988                 child_fid.generation = res->lr_name.name[1];
 989                 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
 990                 if (IS_ERR(dchild)) {
 991                         rc = PTR_ERR(dchild);
 992                         LCONSOLE_WARN("Child "LPU64"/%u lookup error %d.",
 993                                       child_fid.id, child_fid.generation, rc);
 994                         GOTO(cleanup, rc);
 995                 }
 996                 LDLM_LOCK_PUT(granted_lock);
 997         }
 998
 999         cleanup_phase = 2; /* dchild, dparent, locks */
1000
1001         if (dchild->d_inode == NULL) {
1002                 ldlm_reply_set_disposition(rep, DISP_LOOKUP_NEG);
1003                 /* in the intent case, the policy clears this error:
1004                    the disposition is enough */
1005                 GOTO(cleanup, rc = -ENOENT);
1006         } else {
1007                 ldlm_reply_set_disposition(rep, DISP_LOOKUP_POS);
1008         }
1009
1010         if (req->rq_repmsg == NULL) {
1011                 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
1012                 if (rc != 0) {
1013                         CERROR ("mds_getattr_pack_msg: %d\n", rc);
1014                         GOTO (cleanup, rc);
1015                 }
1016         }
1017
1018         rc = mds_getattr_internal(obd, dchild, req, body, offset);
1019         GOTO(cleanup, rc); /* returns the lock to the client */
1020
1021  cleanup:
1022         switch (cleanup_phase) {
1023         case 2:
1024                 if (resent_req == 0) {
1025                         if (rc && dchild->d_inode)
1026                                 ldlm_lock_decref(child_lockh, LCK_CR);
1027                         if (name) {
1028                                 ldlm_lock_decref(&parent_lockh, LCK_CR);
1029                                 l_dput(dparent);
1030                         }
1031                 }
1032                 l_dput(dchild);
1033         case 1:
1034                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1035         default:
1036                 mds_exit_ucred(&uc, mds);
1037                 if (!req->rq_packed_final) {
1038                         int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1039                         if (rc == 0)
1040                                 rc = rc2;
1041                         req->rq_status = rc;
1042                 }
1043         }
1044 cleanup_exit:
1045         return rc;
1046 }
1047
1048 static int mds_getattr(struct ptlrpc_request *req, int offset)
1049 {
1050         struct mds_obd *mds = mds_req2mds(req);
1051         struct obd_device *obd = req->rq_export->exp_obd;
1052         struct lvfs_run_ctxt saved;
1053         struct dentry *de;
1054         struct mds_body *body;
1055         struct lvfs_ucred uc = { NULL, };
1056         int rc = 0;
1057         ENTRY;
1058
1059         OBD_COUNTER_INCREMENT(obd, getattr);
1060
1061         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1062                                   lustre_swab_mds_body);
1063         if (body == NULL)
1064                 GOTO(cleanup_exit, rc = -EFAULT);
1065
1066         rc = mds_init_ucred(&uc, req, offset);
1067         if (rc)
1068                 GOTO(out_ucred, rc);
1069
1070         push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1071         de = mds_fid2dentry(mds, &body->fid1, NULL);
1072         if (IS_ERR(de)) {
1073                 req->rq_status = PTR_ERR(de);
1074                 GOTO(out_pop, rc);
1075         }
1076
1077         rc = mds_getattr_pack_msg(req, de->d_inode, offset);
1078         if (rc != 0) {
1079                 CERROR("mds_getattr_pack_msg: %d\n", rc);
1080                 GOTO(out_dput, rc);
1081         }
1082
1083         req->rq_status = mds_getattr_internal(obd, de, req, body,REPLY_REC_OFF);
1084 out_dput:
1085         l_dput(de);
1086         GOTO(out_pop, rc);
1087 out_pop:
1088         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1089 out_ucred:
1090         if (!req->rq_packed_final) {
1091                 int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1092                 if (rc == 0)
1093                         rc = rc2;
1094                 if (rc != 0)
1095                         req->rq_status = rc;
1096         } else {
1097                 mds_shrink_body_reply(req, offset, REPLY_REC_OFF);
1098         }
1099         mds_exit_ucred(&uc, mds);
1100
1101 cleanup_exit:
1102         return rc;
1103 }
1104
1105 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1106                           __u64 max_age, __u32 flags)
1107 {
1108         int rc;
1109
1110         spin_lock(&obd->obd_osfs_lock);
1111         rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, max_age);
1112         if (rc == 0)
1113                 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1114         spin_unlock(&obd->obd_osfs_lock);
1115
1116         return rc;
1117 }
1118
1119 static int mds_statfs(struct ptlrpc_request *req)
1120 {
1121         struct obd_device *obd = req->rq_export->exp_obd;
1122         struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
1123         int rc, size[2] = { sizeof(struct ptlrpc_body),
1124                             sizeof(struct obd_statfs) };
1125         ENTRY;
1126
1127         /* This will trigger a watchdog timeout */
1128         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
1129                          (MDS_SERVICE_WATCHDOG_FACTOR *
1130                           at_get(&svc->srv_at_estimate)) + 1);
1131         OBD_COUNTER_INCREMENT(obd, statfs);
1132
1133         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
1134                 GOTO(out, rc = -ENOMEM);
1135         rc = lustre_pack_reply(req, 2, size, NULL);
1136         if (rc)
1137                 GOTO(out, rc);
1138
1139         /* We call this so that we can cache a bit - 1 jiffie worth */
1140         rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1141                                                 size[REPLY_REC_OFF]),
1142                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
1143         if (rc) {
1144                 CERROR("mds_obd_statfs failed: rc %d\n", rc);
1145                 GOTO(out, rc);
1146         }
1147
1148         EXIT;
1149 out:
1150         req->rq_status = rc;
1151         return 0;
1152 }
1153
1154 static int mds_sync(struct ptlrpc_request *req, int offset)
1155 {
1156         struct obd_device *obd = req->rq_export->exp_obd;
1157         struct mds_obd *mds = &obd->u.mds;
1158         struct mds_body *body;
1159         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1160         ENTRY;
1161
1162         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1163                                   lustre_swab_mds_body);
1164         if (body == NULL)
1165                 GOTO(out, rc = -EFAULT);
1166
1167         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1168                 GOTO(out, rc = -ENOMEM);
1169         rc = lustre_pack_reply(req, 2, size, NULL);
1170         if (rc)
1171                 GOTO(out, rc);
1172
1173         rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
1174         if (rc == 0 && body->fid1.id != 0) {
1175                 struct dentry *de;
1176
1177                 de = mds_fid2dentry(mds, &body->fid1, NULL);
1178                 if (IS_ERR(de))
1179                         GOTO(out, rc = PTR_ERR(de));
1180
1181                 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1182                                       sizeof(*body));
1183                 mds_pack_inode2body(body, de->d_inode);
1184
1185                 l_dput(de);
1186         }
1187         GOTO(out, rc);
1188 out:
1189         req->rq_status = rc;
1190         return 0;
1191 }
1192
1193 /* mds_readpage does not take a DLM lock on the inode, because the client must
1194  * already have a PR lock.
1195  *
1196  * If we were to take another one here, a deadlock will result, if another
1197  * thread is already waiting for a PW lock. */
1198 static int mds_readpage(struct ptlrpc_request *req, int offset)
1199 {
1200         struct obd_device *obd = req->rq_export->exp_obd;
1201         struct mds_obd *mds = &obd->u.mds;
1202         struct vfsmount *mnt;
1203         struct dentry *de;
1204         struct file *file;
1205         struct mds_body *body, *repbody;
1206         struct lvfs_run_ctxt saved;
1207         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repbody) };
1208         struct lvfs_ucred uc = {NULL,};
1209         ENTRY;
1210
1211         OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_PACK, -ENOMEM);
1212         rc = lustre_pack_reply(req, 2, size, NULL);
1213         if (rc)
1214                 GOTO(out, rc);
1215
1216         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1217                                   lustre_swab_mds_body);
1218         if (body == NULL)
1219                 GOTO (out, rc = -EFAULT);
1220
1221         rc = mds_init_ucred(&uc, req, offset);
1222         if (rc)
1223                 GOTO(out, rc);
1224
1225         push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1226         de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
1227         if (IS_ERR(de))
1228                 GOTO(out_pop, rc = PTR_ERR(de));
1229
1230         CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
1231
1232         file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
1233         /* note: in case of an error, dentry_open puts dentry */
1234         if (IS_ERR(file))
1235                 GOTO(out_pop, rc = PTR_ERR(file));
1236
1237         /* body->size is actually the offset -eeb */
1238         if ((body->size & (de->d_inode->i_sb->s_blocksize - 1)) != 0) {
1239                 CERROR("offset "LPU64" not on a block boundary of %lu\n",
1240                        body->size, de->d_inode->i_sb->s_blocksize);
1241                 GOTO(out_file, rc = -EFAULT);
1242         }
1243
1244         /* body->nlink is actually the #bytes to read -eeb */
1245         if (body->nlink & (de->d_inode->i_sb->s_blocksize - 1)) {
1246                 CERROR("size %u is not multiple of blocksize %lu\n",
1247                        body->nlink, de->d_inode->i_sb->s_blocksize);
1248                 GOTO(out_file, rc = -EFAULT);
1249         }
1250
1251         repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1252                                  sizeof(*repbody));
1253         repbody->size = i_size_read(file->f_dentry->d_inode);
1254         repbody->valid = OBD_MD_FLSIZE;
1255
1256         /* to make this asynchronous make sure that the handling function
1257            doesn't send a reply when this function completes. Instead a
1258            callback function would send the reply */
1259         /* body->size is actually the offset -eeb */
1260         rc = mds_sendpage(req, file, body->size, body->nlink);
1261
1262 out_file:
1263         filp_close(file, 0);
1264 out_pop:
1265         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1266 out:
1267         mds_exit_ucred(&uc, mds);
1268         req->rq_status = rc;
1269         RETURN(0);
1270 }
1271
1272 int mds_reint(struct ptlrpc_request *req, int offset,
1273               struct lustre_handle *lockh)
1274 {
1275         struct mds_update_record *rec; /* 116 bytes on the stack?  no sir! */
1276         int rc;
1277
1278         OBD_ALLOC(rec, sizeof(*rec));
1279         if (rec == NULL)
1280                 RETURN(-ENOMEM);
1281
1282         rc = mds_update_unpack(req, offset, rec);
1283         if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1284                 CERROR("invalid record\n");
1285                 GOTO(out, req->rq_status = -EINVAL);
1286         }
1287
1288         mds_root_squash(&req->rq_export->exp_obd->u.mds, &req->rq_peer.nid,
1289                         &rec->ur_uc.luc_fsuid, &rec->ur_uc.luc_fsgid,
1290                         &rec->ur_uc.luc_cap, &rec->ur_uc.luc_suppgid1,
1291                         &rec->ur_uc.luc_suppgid2);
1292
1293         /* rc will be used to interrupt a for loop over multiple records */
1294         rc = mds_reint_rec(rec, offset, req, lockh);
1295  out:
1296         OBD_FREE(rec, sizeof(*rec));
1297         return rc;
1298 }
1299
1300 static int mds_filter_recovery_request(struct ptlrpc_request *req,
1301                                        struct obd_device *obd, int *process)
1302 {
1303         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1304         case MDS_CONNECT: /* This will never get here, but for completeness. */
1305         case OST_CONNECT: /* This will never get here, but for completeness. */
1306         case MDS_DISCONNECT:
1307         case OST_DISCONNECT:
1308                *process = 1;
1309                RETURN(0);
1310
1311         case MDS_CLOSE:
1312         case MDS_SYNC: /* used in unmounting */
1313         case OBD_PING:
1314         case MDS_SETXATTR:
1315         case MDS_REINT:
1316         case LDLM_ENQUEUE:
1317                 *process = target_queue_recovery_request(req, obd);
1318                 RETURN(0);
1319
1320         default:
1321                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1322                 *process = 0;
1323                 /* XXX what should we set rq_status to here? */
1324                 req->rq_status = -EAGAIN;
1325                 RETURN(ptlrpc_error(req));
1326         }
1327 }
1328
1329 static char *reint_names[] = {
1330         [REINT_SETATTR] "setattr",
1331         [REINT_CREATE]  "create",
1332         [REINT_LINK]    "link",
1333         [REINT_UNLINK]  "unlink",
1334         [REINT_RENAME]  "rename",
1335         [REINT_OPEN]    "open",
1336 };
1337
1338 static int mds_set_info_rpc(struct obd_export *exp, struct ptlrpc_request *req)
1339 {
1340         void *key, *val;
1341         int keylen, vallen, rc = 0;
1342         ENTRY;
1343
1344         key = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, 1);
1345         if (key == NULL) {
1346                 DEBUG_REQ(D_HA, req, "no set_info key");
1347                 RETURN(-EFAULT);
1348         }
1349         keylen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF);
1350
1351         val = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, 0);
1352         vallen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF + 1);
1353
1354         rc = lustre_pack_reply(req, 1, NULL, NULL);
1355         if (rc)
1356                 RETURN(rc);
1357
1358         lustre_msg_set_status(req->rq_repmsg, 0);
1359
1360         /* Accept the broken "read-only" key from 1.6.6 clients. b=17493 */
1361         if (KEY_IS(KEY_READONLY) || KEY_IS(KEY_READONLY_166COMPAT)) {
1362                 if (val == NULL || vallen < sizeof(__u32)) {
1363                         DEBUG_REQ(D_HA, req, "no set_info val");
1364                         RETURN(-EFAULT);
1365                 }
1366
1367                 if (*(__u32 *)val)
1368                         exp->exp_connect_flags |= OBD_CONNECT_RDONLY;
1369                 else
1370                         exp->exp_connect_flags &= ~OBD_CONNECT_RDONLY;
1371         } else {
1372                 RETURN(-EINVAL);
1373         }
1374
1375         RETURN(0);
1376 }
1377
1378 #ifdef HAVE_QUOTA_SUPPORT
1379 static int mds_handle_quotacheck(struct ptlrpc_request *req)
1380 {
1381         struct obd_quotactl *oqctl;
1382         int rc;
1383         ENTRY;
1384
1385         oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1386                                    lustre_swab_obd_quotactl);
1387         if (oqctl == NULL)
1388                 RETURN(-EPROTO);
1389
1390         rc = lustre_pack_reply(req, 1, NULL, NULL);
1391         if (rc)
1392                 RETURN(rc);
1393
1394         req->rq_status = obd_quotacheck(req->rq_export, oqctl);
1395         RETURN(0);
1396 }
1397
1398 static int mds_handle_quotactl(struct ptlrpc_request *req)
1399 {
1400         struct obd_quotactl *oqctl, *repoqc;
1401         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repoqc) };
1402         ENTRY;
1403
1404         oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1405                                    lustre_swab_obd_quotactl);
1406         if (oqctl == NULL)
1407                 RETURN(-EPROTO);
1408
1409         rc = lustre_pack_reply(req, 2, size, NULL);
1410         if (rc)
1411                 RETURN(rc);
1412
1413         repoqc = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*repoqc));
1414
1415         req->rq_status = obd_quotactl(req->rq_export, oqctl);
1416         *repoqc = *oqctl;
1417         RETURN(0);
1418 }
1419 #endif
1420
1421 static int mds_msg_check_version(struct lustre_msg *msg)
1422 {
1423         int rc;
1424
1425         switch (lustre_msg_get_opc(msg)) {
1426         case MDS_CONNECT:
1427         case MDS_DISCONNECT:
1428         case OBD_PING:
1429                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1430                 if (rc)
1431                         CERROR("bad opc %u version %08x, expecting %08x\n",
1432                                lustre_msg_get_opc(msg),
1433                                lustre_msg_get_version(msg),
1434                                LUSTRE_OBD_VERSION);
1435                 break;
1436         case MDS_GETSTATUS:
1437         case MDS_GETATTR:
1438         case MDS_GETATTR_NAME:
1439         case MDS_STATFS:
1440         case MDS_READPAGE:
1441         case MDS_REINT:
1442         case MDS_CLOSE:
1443         case MDS_DONE_WRITING:
1444         case MDS_PIN:
1445         case MDS_SYNC:
1446         case MDS_GETXATTR:
1447         case MDS_SETXATTR:
1448         case MDS_SET_INFO:
1449         case MDS_QUOTACHECK:
1450         case MDS_QUOTACTL:
1451         case QUOTA_DQACQ:
1452         case QUOTA_DQREL:
1453                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
1454                 if (rc)
1455                         CERROR("bad opc %u version %08x, expecting %08x\n",
1456                                lustre_msg_get_opc(msg),
1457                                lustre_msg_get_version(msg),
1458                                LUSTRE_MDS_VERSION);
1459                 break;
1460         case LDLM_ENQUEUE:
1461         case LDLM_CONVERT:
1462         case LDLM_BL_CALLBACK:
1463         case LDLM_CP_CALLBACK:
1464                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1465                 if (rc)
1466                         CERROR("bad opc %u version %08x, expecting %08x\n",
1467                                lustre_msg_get_opc(msg),
1468                                lustre_msg_get_version(msg),
1469                                LUSTRE_DLM_VERSION);
1470                 break;
1471         case OBD_LOG_CANCEL:
1472         case LLOG_ORIGIN_HANDLE_CREATE:
1473         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1474         case LLOG_ORIGIN_HANDLE_READ_HEADER:
1475         case LLOG_ORIGIN_HANDLE_CLOSE:
1476         case LLOG_ORIGIN_HANDLE_DESTROY:
1477         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1478         case LLOG_CATINFO:
1479                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1480                 if (rc)
1481                         CERROR("bad opc %u version %08x, expecting %08x\n",
1482                                lustre_msg_get_opc(msg),
1483                                lustre_msg_get_version(msg),
1484                                LUSTRE_LOG_VERSION);
1485                 break;
1486         default:
1487                 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
1488                 rc = -ENOTSUPP;
1489         }
1490         return rc;
1491 }
1492
1493 int mds_handle(struct ptlrpc_request *req)
1494 {
1495         int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1496         int rc = 0;
1497         struct mds_obd *mds = NULL; /* quell gcc overwarning */
1498         struct obd_device *obd = NULL;
1499         ENTRY;
1500
1501         OBD_FAIL_RETURN(OBD_FAIL_MDS_ALL_REQUEST_NET | OBD_FAIL_ONCE, 0);
1502
1503         LASSERT(current->journal_info == NULL);
1504
1505         rc = mds_msg_check_version(req->rq_reqmsg);
1506         if (rc) {
1507                 CERROR("MDS drop mal-formed request\n");
1508                 RETURN(rc);
1509         }
1510
1511         if (lustre_msg_get_opc(req->rq_reqmsg) != MDS_CONNECT) {
1512                 struct mds_export_data *med;
1513                 int recovering;
1514
1515                 if (!class_connected_export(req->rq_export)) {
1516                         CERROR("operation %d on unconnected MDS from %s\n",
1517                                lustre_msg_get_opc(req->rq_reqmsg),
1518                                libcfs_id2str(req->rq_peer));
1519                         req->rq_status = -ENOTCONN;
1520                         GOTO(out, rc = -ENOTCONN);
1521                 }
1522
1523                 med = &req->rq_export->exp_mds_data;
1524                 obd = req->rq_export->exp_obd;
1525                 mds = &obd->u.mds;
1526
1527                 /* sanity check: if the xid matches, the request must
1528                  * be marked as a resent or replayed */
1529                 if (req->rq_xid == le64_to_cpu(med->med_lcd->lcd_last_xid) ||
1530                     req->rq_xid == le64_to_cpu(med->med_lcd->lcd_last_close_xid))
1531                         if (!(lustre_msg_get_flags(req->rq_reqmsg) &
1532                                  (MSG_RESENT | MSG_REPLAY))) {
1533                                 CERROR("rq_xid "LPU64" matches last_xid, "
1534                                        "expected RESENT flag\n",
1535                                         req->rq_xid);
1536                                 req->rq_status = -ENOTCONN;
1537                                 GOTO(out, rc = -EFAULT);
1538                         }
1539                 /* else: note the opposite is not always true; a
1540                  * RESENT req after a failover will usually not match
1541                  * the last_xid, since it was likely never
1542                  * committed. A REPLAYed request will almost never
1543                  * match the last xid, however it could for a
1544                  * committed, but still retained, open. */
1545
1546                 /* Check for aborted recovery. */
1547                 spin_lock_bh(&obd->obd_processing_task_lock);
1548                 recovering = obd->obd_recovering;
1549                 spin_unlock_bh(&obd->obd_processing_task_lock);
1550                 if (recovering &&
1551                     target_recovery_check_and_stop(obd) == 0) {
1552                         rc = mds_filter_recovery_request(req, obd,
1553                                                          &should_process);
1554                         if (rc || !should_process)
1555                                 RETURN(rc);
1556                 }
1557         }
1558
1559         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1560         case MDS_CONNECT:
1561                 DEBUG_REQ(D_INODE, req, "connect");
1562                 OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
1563                 rc = target_handle_connect(req, mds_handle);
1564                 if (!rc) {
1565                         /* Now that we have an export, set obd. */
1566                         obd = req->rq_export->exp_obd;
1567                 }
1568                 break;
1569
1570         case MDS_DISCONNECT:
1571                 DEBUG_REQ(D_INODE, req, "disconnect");
1572                 OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
1573                 rc = target_handle_disconnect(req);
1574                 req->rq_status = rc;            /* superfluous? */
1575                 break;
1576
1577         case MDS_GETSTATUS:
1578                 DEBUG_REQ(D_INODE, req, "getstatus");
1579                 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
1580                 rc = mds_getstatus(req);
1581                 break;
1582
1583         case MDS_GETATTR:
1584                 DEBUG_REQ(D_INODE, req, "getattr");
1585                 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
1586                 rc = mds_getattr(req, REQ_REC_OFF);
1587                 break;
1588
1589         case MDS_SETXATTR:
1590                 DEBUG_REQ(D_INODE, req, "setxattr");
1591                 OBD_FAIL_RETURN(OBD_FAIL_MDS_SETXATTR_NET, 0);
1592                 rc = mds_setxattr(req);
1593                 break;
1594
1595         case MDS_GETXATTR:
1596                 DEBUG_REQ(D_INODE, req, "getxattr");
1597                 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETXATTR_NET, 0);
1598                 rc = mds_getxattr(req);
1599                 break;
1600
1601         case MDS_GETATTR_NAME: {
1602                 struct lustre_handle lockh = { 0 };
1603                 DEBUG_REQ(D_INODE, req, "getattr_name");
1604                 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NAME_NET, 0);
1605
1606                 /* If this request gets a reconstructed reply, we won't be
1607                  * acquiring any new locks in mds_getattr_lock, so we don't
1608                  * want to cancel.
1609                  */
1610                 rc = mds_getattr_lock(req, REQ_REC_OFF, MDS_INODELOCK_UPDATE,
1611                                       &lockh);
1612                 mds_shrink_body_reply(req, REQ_REC_OFF, REPLY_REC_OFF);
1613                 /* this non-intent call (from an ioctl) is special */
1614                 req->rq_status = rc;
1615                 if (rc == 0 && lustre_handle_is_used(&lockh))
1616                         ldlm_lock_decref(&lockh, LCK_CR);
1617                 break;
1618         }
1619         case MDS_STATFS:
1620                 DEBUG_REQ(D_INODE, req, "statfs");
1621                 OBD_FAIL_RETURN(OBD_FAIL_MDS_STATFS_NET, 0);
1622                 rc = mds_statfs(req);
1623                 break;
1624
1625         case MDS_READPAGE:
1626                 DEBUG_REQ(D_INODE, req, "readpage");
1627                 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
1628                 rc = mds_readpage(req, REQ_REC_OFF);
1629
1630                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_SENDPAGE)) {
1631                         RETURN(0);
1632                 }
1633
1634                 break;
1635
1636         case MDS_REINT: {
1637                 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF,
1638                                              sizeof(*opcp));
1639                 __u32  opc;
1640                 int op = 0;
1641                 int size[4] = { sizeof(struct ptlrpc_body),
1642                                sizeof(struct mds_body),
1643                                mds->mds_max_mdsize,
1644                                mds->mds_max_cookiesize };
1645                 int bufcount;
1646
1647                 /* NB only peek inside req now; mds_reint() will swab it */
1648                 if (opcp == NULL) {
1649                         CERROR ("Can't inspect opcode\n");
1650                         rc = -EINVAL;
1651                         break;
1652                 }
1653                 opc = *opcp;
1654                 if (lustre_req_need_swab(req))
1655                         __swab32s(&opc);
1656
1657                 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1658                           (opc < REINT_MAX) ? reint_names[opc] :
1659                           "unknown opcode");
1660
1661                 switch (opc) {
1662                 case REINT_CREATE:
1663                         op = PTLRPC_LAST_CNTR + MDS_REINT_CREATE;
1664                         break;
1665                 case REINT_LINK:
1666                         op = PTLRPC_LAST_CNTR + MDS_REINT_LINK;
1667                         break;
1668                 case REINT_OPEN:
1669                         op = PTLRPC_LAST_CNTR + MDS_REINT_OPEN;
1670                         break;
1671                 case REINT_SETATTR:
1672                         op = PTLRPC_LAST_CNTR + MDS_REINT_SETATTR;
1673                         break;
1674                 case REINT_RENAME:
1675                         op = PTLRPC_LAST_CNTR + MDS_REINT_RENAME;
1676                         break;
1677                 case REINT_UNLINK:
1678                         op = PTLRPC_LAST_CNTR + MDS_REINT_UNLINK;
1679                         break;
1680                 default:
1681                         op = 0;
1682                         break;
1683                 }
1684
1685                 if (op && req->rq_rqbd->rqbd_service->srv_stats)
1686                         lprocfs_counter_incr(
1687                                 req->rq_rqbd->rqbd_service->srv_stats, op);
1688
1689                 OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
1690
1691                 if (opc == REINT_UNLINK || opc == REINT_RENAME)
1692                         bufcount = 4;
1693                 else if (opc == REINT_OPEN)
1694                         bufcount = 3;
1695                 else
1696                         bufcount = 2;
1697
1698                 /* if we do recovery we isn't send reply mds state is restored */
1699                 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1700                         size[DLM_REPLY_REC_OFF] = 0;
1701                         if (opc == REINT_UNLINK || opc == REINT_RENAME)
1702                                 size[DLM_REPLY_REC_OFF + 1] = 0;
1703                 }
1704
1705                 rc = lustre_pack_reply(req, bufcount, size, NULL);
1706                 if (rc)
1707                         break;
1708
1709                 rc = mds_reint(req, REQ_REC_OFF, NULL);
1710                 mds_shrink_intent_reply(req, opc, REPLY_REC_OFF);
1711                 fail = OBD_FAIL_MDS_REINT_NET_REP;
1712                 break;
1713         }
1714
1715         case MDS_CLOSE:
1716                 DEBUG_REQ(D_INODE, req, "close");
1717                 OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
1718                 rc = mds_close(req, REQ_REC_OFF);
1719                 mds_shrink_body_reply(req, REQ_REC_OFF, REPLY_REC_OFF);
1720                 fail = OBD_FAIL_MDS_CLOSE_NET_REP;
1721                 break;
1722
1723         case MDS_DONE_WRITING:
1724                 DEBUG_REQ(D_INODE, req, "done_writing");
1725                 OBD_FAIL_RETURN(OBD_FAIL_MDS_DONE_WRITING_NET, 0);
1726                 rc = mds_done_writing(req, REQ_REC_OFF);
1727                 break;
1728
1729         case MDS_PIN:
1730                 DEBUG_REQ(D_INODE, req, "pin");
1731                 OBD_FAIL_RETURN(OBD_FAIL_MDS_PIN_NET, 0);
1732                 rc = mds_pin(req, REQ_REC_OFF);
1733                 break;
1734
1735         case MDS_SYNC:
1736                 DEBUG_REQ(D_INODE, req, "sync");
1737                 OBD_FAIL_RETURN(OBD_FAIL_MDS_SYNC_NET, 0);
1738                 rc = mds_sync(req, REQ_REC_OFF);
1739                 break;
1740
1741         case MDS_SET_INFO:
1742                 DEBUG_REQ(D_INODE, req, "set_info");
1743                 rc = mds_set_info_rpc(req->rq_export, req);
1744                 break;
1745 #ifdef HAVE_QUOTA_SUPPORT
1746         case MDS_QUOTACHECK:
1747                 DEBUG_REQ(D_INODE, req, "quotacheck");
1748                 OBD_FAIL_RETURN(OBD_FAIL_MDS_QUOTACHECK_NET, 0);
1749                 rc = mds_handle_quotacheck(req);
1750                 break;
1751
1752         case MDS_QUOTACTL:
1753                 DEBUG_REQ(D_INODE, req, "quotactl");
1754                 OBD_FAIL_RETURN(OBD_FAIL_MDS_QUOTACTL_NET, 0);
1755                 rc = mds_handle_quotactl(req);
1756                 break;
1757 #endif
1758         case OBD_PING:
1759                 DEBUG_REQ(D_INODE, req, "ping");
1760                 rc = target_handle_ping(req);
1761                 if (req->rq_export->exp_delayed)
1762                         mds_update_client_epoch(req->rq_export);
1763                 break;
1764
1765         case OBD_LOG_CANCEL:
1766                 CDEBUG(D_INODE, "log cancel\n");
1767                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1768                 rc = -ENOTSUPP; /* la la la */
1769                 break;
1770
1771         case LDLM_ENQUEUE:
1772                 DEBUG_REQ(D_INODE, req, "enqueue");
1773                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1774                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1775                                          ldlm_server_blocking_ast, NULL);
1776                 fail = OBD_FAIL_LDLM_REPLY;
1777                 break;
1778         case LDLM_CONVERT:
1779                 DEBUG_REQ(D_INODE, req, "convert");
1780                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1781                 rc = ldlm_handle_convert(req);
1782                 break;
1783         case LDLM_BL_CALLBACK:
1784         case LDLM_CP_CALLBACK:
1785                 DEBUG_REQ(D_INODE, req, "callback");
1786                 CERROR("callbacks should not happen on MDS\n");
1787                 LBUG();
1788                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1789                 break;
1790         case LLOG_ORIGIN_HANDLE_CREATE:
1791                 DEBUG_REQ(D_INODE, req, "llog_init");
1792                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1793                 rc = llog_origin_handle_create(req);
1794                 break;
1795         case LLOG_ORIGIN_HANDLE_DESTROY:
1796                 DEBUG_REQ(D_INODE, req, "llog_init");
1797                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1798                 rc = llog_origin_handle_destroy(req);
1799                 break;
1800         case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1801                 DEBUG_REQ(D_INODE, req, "llog next block");
1802                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1803                 rc = llog_origin_handle_next_block(req);
1804                 break;
1805         case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1806                 DEBUG_REQ(D_INODE, req, "llog prev block");
1807                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1808                 rc = llog_origin_handle_prev_block(req);
1809                 break;
1810         case LLOG_ORIGIN_HANDLE_READ_HEADER:
1811                 DEBUG_REQ(D_INODE, req, "llog read header");
1812                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1813                 rc = llog_origin_handle_read_header(req);
1814                 break;
1815         case LLOG_ORIGIN_HANDLE_CLOSE:
1816                 DEBUG_REQ(D_INODE, req, "llog close");
1817                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1818                 rc = llog_origin_handle_close(req);
1819                 break;
1820         case LLOG_CATINFO:
1821                 DEBUG_REQ(D_INODE, req, "llog catinfo");
1822                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1823                 rc = llog_catinfo(req);
1824                 break;
1825         default:
1826                 req->rq_status = -ENOTSUPP;
1827                 rc = ptlrpc_error(req);
1828                 RETURN(rc);
1829         }
1830
1831         LASSERT(current->journal_info == NULL);
1832
1833         /* If we're DISCONNECTing, the mds_export_data is already freed */
1834         if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != MDS_DISCONNECT) {
1835                 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1836
1837                 /* I don't think last_xid is used for anyway, so I'm not sure
1838                    if we need to care about last_close_xid here.*/
1839                 lustre_msg_set_last_xid(req->rq_repmsg,
1840                                         le64_to_cpu(med->med_lcd->lcd_last_xid));
1841                 target_committed_to_req(req);
1842         }
1843
1844         EXIT;
1845 out:
1846         return target_handle_reply(req, rc, fail);
1847 }
1848
1849 /* Update the server data on disk.  This stores the new mount_count and
1850  * also the last_rcvd value to disk.  If we don't have a clean shutdown,
1851  * then the server last_rcvd value may be less than that of the clients.
1852  * This will alert us that we may need to do client recovery.
1853  *
1854  * Also assumes for mds_last_transno that we are not modifying it (no locking).
1855  */
1856 int mds_update_server_data(struct obd_device *obd, int force_sync)
1857 {
1858         struct mds_obd *mds = &obd->u.mds;
1859         struct lr_server_data *lsd = mds->mds_server_data;
1860         struct file *filp = mds->mds_rcvd_filp;
1861         struct lvfs_run_ctxt saved;
1862         loff_t off = 0;
1863         int rc;
1864         ENTRY;
1865
1866         CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1867                mds->mds_mount_count, mds->mds_last_transno);
1868
1869         spin_lock(&mds->mds_transno_lock);
1870         lsd->lsd_last_transno = cpu_to_le64(mds->mds_last_transno);
1871         spin_unlock(&mds->mds_transno_lock);
1872
1873         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1874         rc = fsfilt_write_record(obd, filp, lsd, sizeof(*lsd), &off,force_sync);
1875         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1876         if (rc)
1877                 CERROR("error writing MDS server data: rc = %d\n", rc);
1878
1879         RETURN(rc);
1880 }
1881
1882 static void fsoptions_to_mds_flags(struct mds_obd *mds, char *options)
1883 {
1884         char *p = options;
1885
1886         if (!options)
1887                 return;
1888
1889         while (*options) {
1890                 int len;
1891
1892                 while (*p && *p != ',')
1893                         p++;
1894
1895                 len = p - options;
1896                 if (len == sizeof("user_xattr") - 1 &&
1897                     memcmp(options, "user_xattr", len) == 0) {
1898                         mds->mds_fl_user_xattr = 1;
1899                         LCONSOLE_INFO("Enabling user_xattr\n");
1900                 } else if (len == sizeof("nouser_xattr") - 1 &&
1901                            memcmp(options, "nouser_xattr", len) == 0) {
1902                         mds->mds_fl_user_xattr = 0;
1903                         LCONSOLE_INFO("Disabling user_xattr\n");
1904                 } else if (len == sizeof("acl") - 1 &&
1905                            memcmp(options, "acl", len) == 0) {
1906 #ifdef CONFIG_FS_POSIX_ACL
1907                         mds->mds_fl_acl = 1;
1908                         LCONSOLE_INFO("Enabling ACL\n");
1909 #else
1910                         CWARN("ignoring unsupported acl mount option\n");
1911 #endif
1912                 } else if (len == sizeof("noacl") - 1 &&
1913                            memcmp(options, "noacl", len) == 0) {
1914 #ifdef CONFIG_FS_POSIX_ACL
1915                         mds->mds_fl_acl = 0;
1916                         LCONSOLE_INFO("Disabling ACL\n");
1917 #endif
1918                 }
1919
1920                 options = ++p;
1921         }
1922 }
1923
1924 /* mount the file system (secretly).  lustre_cfg parameters are:
1925  * 1 = device
1926  * 2 = fstype
1927  * 3 = config name
1928  * 4 = mount options
1929  */
1930 static int mds_setup(struct obd_device *obd, obd_count len, void *buf)
1931 {
1932         struct lprocfs_static_vars lvars;
1933         struct lustre_cfg* lcfg = buf;
1934         struct mds_obd *mds = &obd->u.mds;
1935         struct lustre_sb_info *lsi;
1936         struct lustre_mount_info *lmi;
1937         struct vfsmount *mnt;
1938         struct obd_uuid uuid;
1939         __u8 *uuid_ptr;
1940         char *str, *label;
1941         char ns_name[48];
1942         int rc = 0;
1943         ENTRY;
1944
1945         /* setup 1:/dev/loop/0 2:ext3 3:mdsA 4:errors=remount-ro,iopen_nopriv */
1946
1947         CLASSERT(offsetof(struct obd_device, u.obt) ==
1948                  offsetof(struct obd_device, u.mds.mds_obt));
1949
1950         if (lcfg->lcfg_bufcount < 3)
1951                 RETURN(-EINVAL);
1952
1953         if (LUSTRE_CFG_BUFLEN(lcfg, 1) == 0 || LUSTRE_CFG_BUFLEN(lcfg, 2) == 0)
1954                 RETURN(-EINVAL);
1955
1956         lmi = server_get_mount(obd->obd_name);
1957         if (!lmi) {
1958                 CERROR("Not mounted in lustre_fill_super?\n");
1959                 RETURN(-EINVAL);
1960         }
1961
1962         /* We mounted in lustre_fill_super.
1963            lcfg bufs 1, 2, 4 (device, fstype, mount opts) are ignored.*/
1964         lsi = s2lsi(lmi->lmi_sb);
1965         fsoptions_to_mds_flags(mds, lsi->lsi_ldd->ldd_mount_opts);
1966         fsoptions_to_mds_flags(mds, lsi->lsi_lmd->lmd_opts);
1967         mnt = lmi->lmi_mnt;
1968         obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
1969         if (IS_ERR(obd->obd_fsops))
1970                 GOTO(err_put, rc = PTR_ERR(obd->obd_fsops));
1971
1972         CDEBUG(D_SUPER, "%s: mnt = %p\n", lustre_cfg_string(lcfg, 1), mnt);
1973
1974         if (lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb))) {
1975                 CERROR("%s: Underlying device is marked as read-only. "
1976                        "Setup failed\n", obd->obd_name);
1977                 GOTO(err_ops, rc = -EROFS);
1978         }
1979
1980         sema_init(&mds->mds_epoch_sem, 1);
1981         spin_lock_init(&mds->mds_transno_lock);
1982         mds->mds_max_mdsize = sizeof(struct lov_mds_md_v3);
1983         mds->mds_max_cookiesize = sizeof(struct llog_cookie);
1984         mds->mds_atime_diff = MAX_ATIME_DIFF;
1985         mds->mds_evict_ost_nids = 1;
1986         /* sync permission changes */
1987         mds->mds_sync_permission = 0;
1988
1989         sprintf(ns_name, "mds-%s", obd->obd_uuid.uuid);
1990         obd->obd_namespace = ldlm_namespace_new(obd, ns_name, LDLM_NAMESPACE_SERVER,
1991                                                 LDLM_NAMESPACE_GREEDY);
1992         if (obd->obd_namespace == NULL) {
1993                 mds_cleanup(obd);
1994                 GOTO(err_ops, rc = -ENOMEM);
1995         }
1996         ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
1997
1998         lprocfs_mds_init_vars(&lvars);
1999         if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
2000             lprocfs_alloc_obd_stats(obd, LPROC_MDS_LAST) == 0) {
2001                 /* Init private stats here */
2002                 mds_stats_counter_init(obd->obd_stats);
2003 #ifdef HAVE_DELAYED_RECOVERY
2004                 lprocfs_obd_attach_stale_exports(obd);
2005 #endif
2006                 obd->obd_proc_exports_entry = proc_mkdir("exports",
2007                                                          obd->obd_proc_entry);
2008         }
2009
2010         rc = mds_fs_setup(obd, mnt);
2011         if (rc) {
2012                 CERROR("%s: MDS filesystem method init failed: rc = %d\n",
2013                        obd->obd_name, rc);
2014                 GOTO(err_ns, rc);
2015         }
2016
2017         if (obd->obd_proc_exports_entry)
2018                 lprocfs_add_simple(obd->obd_proc_exports_entry,
2019                                    "clear", lprocfs_nid_stats_clear_read,
2020                                    lprocfs_nid_stats_clear_write, obd, NULL);
2021
2022         if (lcfg->lcfg_bufcount >= 4 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
2023                 class_uuid_t uuid;
2024
2025                 ll_generate_random_uuid(uuid);
2026                 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
2027
2028                 OBD_ALLOC(mds->mds_profile, LUSTRE_CFG_BUFLEN(lcfg, 3));
2029                 if (mds->mds_profile == NULL)
2030                         GOTO(err_fs, rc = -ENOMEM);
2031
2032                 strncpy(mds->mds_profile, lustre_cfg_string(lcfg, 3),
2033                         LUSTRE_CFG_BUFLEN(lcfg, 3));
2034         }
2035
2036         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2037                            "mds_ldlm_client", &obd->obd_ldlm_client);
2038         obd->obd_replayable = 1;
2039
2040         rc = lquota_setup(mds_quota_interface_ref, obd);
2041         if (rc)
2042                 GOTO(err_fs, rc);
2043
2044         mds->mds_group_hash = upcall_cache_init(obd->obd_name);
2045         if (IS_ERR(mds->mds_group_hash)) {
2046                 rc = PTR_ERR(mds->mds_group_hash);
2047                 mds->mds_group_hash = NULL;
2048                 GOTO(err_qctxt, rc);
2049         }
2050
2051         /* Don't wait for mds_postrecov trying to clear orphans */
2052         obd->obd_async_recov = 1;
2053         rc = mds_postsetup(obd);
2054         /* Bug 11557 - allow async abort_recov start
2055            FIXME can remove most of this obd_async_recov plumbing
2056         obd->obd_async_recov = 0;
2057         */
2058         if (rc)
2059                 GOTO(err_qctxt, rc);
2060
2061         uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
2062         if (uuid_ptr != NULL) {
2063                 class_uuid_unparse(uuid_ptr, &uuid);
2064                 str = uuid.uuid;
2065         } else {
2066                 str = "no UUID";
2067         }
2068
2069         label = fsfilt_get_label(obd, obd->u.obt.obt_sb);
2070         LCONSOLE_INFO("%s: Now serving %s on %s with recovery %s\n",
2071                       obd->obd_name, label ?: str, lsi->lsi_lmd->lmd_dev,
2072                       obd->obd_replayable ? "enabled" : "disabled");
2073
2074         if (obd->obd_recovering)
2075                 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
2076                               "or until %d client%s reconnect%s\n",
2077                               obd->obd_name,
2078                               obd->obd_recovery_timeout / 60,
2079                               obd->obd_recovery_timeout % 60,
2080                               obd->obd_recoverable_clients,
2081                               obd->obd_recoverable_clients == 1 ? "" : "s",
2082                               obd->obd_recoverable_clients == 1 ? "s": "");
2083
2084         /* Reduce the initial timeout on an MDS because it doesn't need such
2085          * a long timeout as an OST does. Adaptive timeouts will adjust this
2086          * value appropriately. */
2087         if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
2088                 ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
2089
2090         RETURN(0);
2091
2092 err_qctxt:
2093         lquota_cleanup(mds_quota_interface_ref, obd);
2094 err_fs:
2095         /* No extra cleanup needed for llog_init_commit_thread() */
2096         mds_fs_cleanup(obd);
2097         upcall_cache_cleanup(mds->mds_group_hash);
2098         mds->mds_group_hash = NULL;
2099         remove_proc_entry("clear", obd->obd_proc_exports_entry);
2100 err_ns:
2101         lprocfs_free_per_client_stats(obd);
2102         lprocfs_free_obd_stats(obd);
2103         lprocfs_obd_cleanup(obd);
2104         ldlm_namespace_free(obd->obd_namespace, NULL, 0);
2105         obd->obd_namespace = NULL;
2106 err_ops:
2107         fsfilt_put_ops(obd->obd_fsops);
2108 err_put:
2109         server_put_mount(obd->obd_name, mnt);
2110         obd->u.obt.obt_sb = NULL;
2111         return rc;
2112 }
2113
2114 static int mds_lov_clean(struct obd_device *obd)
2115 {
2116         struct mds_obd *mds = &obd->u.mds;
2117         struct obd_device *lov = mds->mds_lov_obd;
2118         ENTRY;
2119
2120         if (mds->mds_profile) {
2121                 class_del_profile(mds->mds_profile);
2122                 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
2123                 mds->mds_profile = NULL;
2124         }
2125
2126         /* There better be a lov */
2127         if (!lov)
2128                 RETURN(0);
2129         if (IS_ERR(lov))
2130                 RETURN(PTR_ERR(lov));
2131
2132         obd_register_observer(lov, NULL);
2133
2134         /* Give lov our same shutdown flags */
2135         lov->obd_force = obd->obd_force;
2136         lov->obd_fail = obd->obd_fail;
2137
2138         /* Cleanup the lov */
2139         obd_disconnect(mds->mds_lov_exp);
2140         class_manual_cleanup(lov);
2141         mds->mds_lov_exp = NULL;
2142
2143         RETURN(0);
2144 }
2145
2146 static int mds_postsetup(struct obd_device *obd)
2147 {
2148         struct mds_obd *mds = &obd->u.mds;
2149         struct llog_ctxt *ctxt;
2150         int rc = 0;
2151         ENTRY;
2152
2153         rc = llog_setup(obd, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
2154                         &llog_lvfs_ops);
2155         if (rc)
2156                 RETURN(rc);
2157
2158         rc = llog_setup(obd, LLOG_LOVEA_ORIG_CTXT, obd, 0, NULL,
2159                         &llog_lvfs_ops);
2160         if (rc)
2161                 GOTO(err_llog, rc);
2162
2163         if (mds->mds_profile) {
2164                 struct lustre_profile *lprof;
2165                 /* The profile defines which osc and mdc to connect to, for a
2166                    client.  We reuse that here to figure out the name of the
2167                    lov to use (and ignore lprof->lp_mdc).
2168                    The profile was set in the config log with
2169                    LCFG_MOUNTOPT profilenm oscnm mdcnm */
2170                 lprof = class_get_profile(mds->mds_profile);
2171                 if (lprof == NULL) {
2172                         CERROR("No profile found: %s\n", mds->mds_profile);
2173                         GOTO(err_cleanup, rc = -ENOENT);
2174                 }
2175                 rc = mds_lov_connect(obd, lprof->lp_osc);
2176                 if (rc)
2177                         GOTO(err_cleanup, rc);
2178         }
2179
2180         RETURN(rc);
2181
2182 err_cleanup:
2183         mds_lov_clean(obd);
2184         ctxt = llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT);
2185         if (ctxt)
2186                 llog_cleanup(ctxt);
2187 err_llog:
2188         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
2189         if (ctxt)
2190                 llog_cleanup(ctxt);
2191         return rc;
2192 }
2193
2194 int mds_postrecov(struct obd_device *obd)
2195 {
2196         int rc;
2197         ENTRY;
2198
2199         if (obd->obd_fail)
2200                 RETURN(0);
2201
2202         LASSERT(!obd->obd_recovering);
2203
2204         /* VBR: update boot epoch after recovery */
2205         mds_update_last_epoch(obd);
2206
2207         /* clean PENDING dir */
2208         rc = mds_cleanup_pending(obd);
2209         if (rc < 0)
2210                 GOTO(out, rc);
2211         /* FIXME Does target_finish_recovery really need this to block? */
2212         /* Notify the LOV, which will in turn call mds_notify for each tgt */
2213         /* This means that we have to hack obd_notify to think we're obd_set_up
2214            during mds_lov_connect. */
2215         obd_notify(obd->u.mds.mds_lov_obd, NULL,
2216                    obd->obd_async_recov ? OBD_NOTIFY_SYNC_NONBLOCK :
2217                    OBD_NOTIFY_SYNC, NULL);
2218
2219         /* quota recovery */
2220         if (likely(obd->obd_stopping == 0))
2221                 lquota_recovery(mds_quota_interface_ref, obd);
2222
2223 out:
2224         RETURN(rc);
2225 }
2226
2227 /* We need to be able to stop an mds_lov_synchronize */
2228 static int mds_lov_early_clean(struct obd_device *obd)
2229 {
2230         struct mds_obd *mds = &obd->u.mds;
2231         struct obd_device *lov = mds->mds_lov_obd;
2232
2233         if (!lov || (!obd->obd_force && !obd->obd_fail))
2234                 return(0);
2235
2236         CDEBUG(D_HA, "abort inflight\n");
2237         return (obd_precleanup(lov, OBD_CLEANUP_EARLY));
2238 }
2239
2240 static int mds_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2241 {
2242         int rc = 0;
2243         ENTRY;
2244
2245         switch (stage) {
2246         case OBD_CLEANUP_EARLY:
2247                 break;
2248         case OBD_CLEANUP_EXPORTS:
2249                 target_cleanup_recovery(obd);
2250                 mds_lov_early_clean(obd);
2251                 break;
2252         case OBD_CLEANUP_SELF_EXP:
2253                 mds_lov_disconnect(obd);
2254                 mds_lov_clean(obd);
2255                 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
2256                 llog_cleanup(llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT));
2257                 rc = obd_llog_finish(obd, 0);
2258                 break;
2259         case OBD_CLEANUP_OBD:
2260                 break;
2261         }
2262         RETURN(rc);
2263 }
2264
2265 static int mds_cleanup(struct obd_device *obd)
2266 {
2267         struct mds_obd *mds = &obd->u.mds;
2268         lvfs_sbdev_type save_dev;
2269         ENTRY;
2270
2271         if (obd->u.obt.obt_sb == NULL)
2272                 RETURN(0);
2273         save_dev = lvfs_sbdev(obd->u.obt.obt_sb);
2274
2275         if (mds->mds_lov_exp)
2276                 /* lov export was disconnected by mds_lov_clean;
2277                    we just need to drop our ref */
2278                 class_export_put(mds->mds_lov_exp);
2279
2280         remove_proc_entry("clear", obd->obd_proc_exports_entry);
2281         lprocfs_free_per_client_stats(obd);
2282         lprocfs_free_obd_stats(obd);
2283         lprocfs_obd_cleanup(obd);
2284
2285         lquota_cleanup(mds_quota_interface_ref, obd);
2286
2287         mds_update_server_data(obd, 1);
2288         mds_fs_cleanup(obd);
2289
2290         upcall_cache_cleanup(mds->mds_group_hash);
2291         mds->mds_group_hash = NULL;
2292
2293         server_put_mount(obd->obd_name, mds->mds_vfsmnt);
2294         obd->u.obt.obt_sb = NULL;
2295
2296         ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
2297         obd->obd_namespace = NULL;
2298
2299         spin_lock_bh(&obd->obd_processing_task_lock);
2300         if (obd->obd_recovering) {
2301                 target_cancel_recovery_timer(obd);
2302                 obd->obd_recovering = 0;
2303         }
2304         spin_unlock_bh(&obd->obd_processing_task_lock);
2305
2306         fsfilt_put_ops(obd->obd_fsops);
2307
2308         LCONSOLE_INFO("MDT %s has stopped.\n", obd->obd_name);
2309
2310         RETURN(0);
2311 }
2312
2313 static void fixup_handle_for_resent_req(struct ptlrpc_request *req, int offset,
2314                                         struct ldlm_lock *new_lock,
2315                                         struct ldlm_lock **old_lock,
2316                                         struct lustre_handle *lockh)
2317 {
2318         struct obd_export *exp = req->rq_export;
2319         struct ldlm_request *dlmreq =
2320                 lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*dlmreq));
2321         struct lustre_handle remote_hdl = dlmreq->lock_handle[0];
2322         struct ldlm_lock *lock;
2323
2324         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
2325                 return;
2326
2327         lock = lustre_hash_lookup(exp->exp_lock_hash, &remote_hdl);
2328         if (lock) {
2329                 if (lock != new_lock) {
2330                         lockh->cookie = lock->l_handle.h_cookie;
2331                         LDLM_DEBUG(lock, "restoring lock cookie");
2332                         DEBUG_REQ(D_DLMTRACE, req, "restoring lock cookie "
2333                                   LPX64, lockh->cookie);
2334                         if (old_lock)
2335                                 *old_lock = LDLM_LOCK_GET(lock);
2336
2337                         lh_put(exp->exp_lock_hash, &lock->l_exp_hash);
2338                         return;
2339                 }
2340                 lh_put(exp->exp_lock_hash, &lock->l_exp_hash);
2341         }
2342
2343         /* If the xid matches, then we know this is a resent request,
2344          * and allow it. (It's probably an OPEN, for which we don't
2345          * send a lock */
2346         if (req->rq_xid <=
2347             le64_to_cpu(exp->exp_mds_data.med_lcd->lcd_last_xid))
2348                 return;
2349
2350         if (req->rq_xid <=
2351             le64_to_cpu(exp->exp_mds_data.med_lcd->lcd_last_close_xid))
2352                 return;
2353
2354         /* This remote handle isn't enqueued, so we never received or
2355          * processed this request.  Clear MSG_RESENT, because it can
2356          * be handled like any normal request now. */
2357
2358         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2359
2360         DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
2361                   remote_hdl.cookie);
2362 }
2363
2364 #define IS_CLIENT_DISCONNECT_ERROR(error) \
2365                 (error == -ENOTCONN || error == -ENODEV)
2366
2367 static int mds_intent_policy(struct ldlm_namespace *ns,
2368                              struct ldlm_lock **lockp, void *req_cookie,
2369                              ldlm_mode_t mode, int flags, void *data)
2370 {
2371         struct ptlrpc_request *req = req_cookie;
2372         struct ldlm_lock *lock = *lockp;
2373         struct ldlm_intent *it;
2374         struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
2375         struct ldlm_reply *rep;
2376         struct lustre_handle lockh = { 0 };
2377         struct ldlm_lock *new_lock = NULL;
2378         int getattr_part = MDS_INODELOCK_UPDATE;
2379         int repsize[5] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
2380                            [DLM_LOCKREPLY_OFF]   = sizeof(struct ldlm_reply),
2381                            [DLM_REPLY_REC_OFF]   = sizeof(struct mds_body),
2382                            [DLM_REPLY_REC_OFF+1] = mds->mds_max_mdsize };
2383         int repbufcnt = 4, rc;
2384         ENTRY;
2385
2386         LASSERT(req != NULL);
2387
2388         if (lustre_msg_bufcount(req->rq_reqmsg) <= DLM_INTENT_IT_OFF) {
2389                 /* No intent was provided */
2390                 rc = lustre_pack_reply(req, 2, repsize, NULL);
2391                 if (rc)
2392                         RETURN(rc);
2393                 RETURN(0);
2394         }
2395
2396         it = lustre_swab_reqbuf(req, DLM_INTENT_IT_OFF, sizeof(*it),
2397                                 lustre_swab_ldlm_intent);
2398         if (it == NULL) {
2399                 CERROR("Intent missing\n");
2400                 RETURN(req->rq_status = -EFAULT);
2401         }
2402
2403         LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
2404
2405         if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
2406             (it->opc & (IT_OPEN | IT_GETATTR | IT_LOOKUP | IT_READDIR)))
2407                 /* we should never allow OBD_CONNECT_ACL if not configured */
2408                 repsize[repbufcnt++] = LUSTRE_POSIX_ACL_MAX_SIZE;
2409         else if (it->opc & IT_UNLINK)
2410                 repsize[repbufcnt++] = mds->mds_max_cookiesize;
2411
2412         /* if we do recovery we isn't send reply mds state is restored */
2413         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
2414                 repsize[DLM_REPLY_REC_OFF+1] = 0;
2415                 if (it->opc & IT_UNLINK)
2416                         repsize[DLM_REPLY_REC_OFF+2] = 0;
2417         }
2418
2419         rc = lustre_pack_reply(req, repbufcnt, repsize, NULL);
2420         if (rc)
2421                 RETURN(req->rq_status = rc);
2422
2423         rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
2424         ldlm_reply_set_disposition(rep, DISP_IT_EXECD);
2425
2426         /* execute policy */
2427         switch ((long)it->opc) {
2428         case IT_OPEN:
2429         case IT_CREAT|IT_OPEN:
2430                 mds_counter_incr(req->rq_export, LPROC_MDS_OPEN);
2431                 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock, NULL,
2432                                             &lockh);
2433                 /* XXX swab here to assert that an mds_open reint
2434                  * packet is following */
2435                 rep->lock_policy_res2 = mds_reint(req, DLM_INTENT_REC_OFF,
2436                                                   &lockh);
2437                 mds_shrink_intent_reply(req, REINT_OPEN, DLM_REPLY_REC_OFF);
2438 #if 0
2439                 /* We abort the lock if the lookup was negative and
2440                  * we did not make it to the OPEN portion */
2441                 if (!ldlm_reply_disposition(rep, DISP_LOOKUP_EXECD))
2442                         RETURN(ELDLM_LOCK_ABORTED);
2443                 if (ldlm_reply_disposition(rep, DISP_LOOKUP_NEG) &&
2444                     !ldlm_reply_disposition(rep, DISP_OPEN_OPEN))
2445 #endif
2446
2447                 /* If there was an error of some sort or if we are not
2448                  * returning any locks */
2449                  if (rep->lock_policy_res2 ||
2450                      !ldlm_reply_disposition(rep, DISP_OPEN_LOCK)) {
2451                         /* If it is the disconnect error (ENODEV & ENOCONN)
2452                          * ptlrpc layer should know this imediately, it should
2453                          * be replied by rq_stats, otherwise, return it by
2454                          * intent here
2455                          */
2456                          /* if VBR failure then return error in rq_stats too */
2457                         if (IS_CLIENT_DISCONNECT_ERROR(rep->lock_policy_res2) ||
2458                             rep->lock_policy_res2 == -EOVERFLOW)
2459                                 RETURN(rep->lock_policy_res2);
2460                         else
2461                                 RETURN(ELDLM_LOCK_ABORTED);
2462                  }
2463                 break;
2464         case IT_LOOKUP:
2465                         getattr_part = MDS_INODELOCK_LOOKUP;
2466         case IT_GETATTR:
2467                         getattr_part |= MDS_INODELOCK_LOOKUP;
2468                         OBD_COUNTER_INCREMENT(req->rq_export->exp_obd, getattr);
2469         case IT_READDIR:
2470                 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock,
2471                                             &new_lock, &lockh);
2472
2473                 /* INODEBITS_INTEROP: if this lock was converted from a
2474                  * plain lock (client does not support inodebits), then
2475                  * child lock must be taken with both lookup and update
2476                  * bits set for all operations.
2477                  */
2478                 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS))
2479                         getattr_part = MDS_INODELOCK_LOOKUP |
2480                                        MDS_INODELOCK_UPDATE;
2481
2482                 rep->lock_policy_res2 = mds_getattr_lock(req,DLM_INTENT_REC_OFF,
2483                                                          getattr_part, &lockh);
2484                 mds_shrink_body_reply(req,DLM_INTENT_REC_OFF, DLM_REPLY_REC_OFF);
2485                 /* FIXME: LDLM can set req->rq_status. MDS sets
2486                    policy_res{1,2} with disposition and status.
2487                    - replay: returns 0 & req->status is old status
2488                    - otherwise: returns req->status */
2489                 if (ldlm_reply_disposition(rep, DISP_LOOKUP_NEG))
2490                         rep->lock_policy_res2 = 0;
2491                 if (!ldlm_reply_disposition(rep, DISP_LOOKUP_POS) ||
2492                     rep->lock_policy_res2)
2493                         RETURN(ELDLM_LOCK_ABORTED);
2494                 if (req->rq_status != 0) {
2495                         LBUG();
2496                         rep->lock_policy_res2 = req->rq_status;
2497                         RETURN(ELDLM_LOCK_ABORTED);
2498                 }
2499                 break;
2500         default:
2501                 CERROR("Unhandled intent "LPD64"\n", it->opc);
2502                 RETURN(-EFAULT);
2503         }
2504
2505         /* By this point, whatever function we called above must have either
2506          * filled in 'lockh', been an intent replay, or returned an error.  We
2507          * want to allow replayed RPCs to not get a lock, since we would just
2508          * drop it below anyways because lock replay is done separately by the
2509          * client afterwards.  For regular RPCs we want to give the new lock to
2510          * the client instead of whatever lock it was about to get. */
2511         if (new_lock == NULL)
2512                 new_lock = ldlm_handle2lock(&lockh);
2513         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
2514                 RETURN(0);
2515
2516         LASSERTF(new_lock != NULL, "op "LPX64" lockh "LPX64"\n",
2517                  it->opc, lockh.cookie);
2518
2519         /* If we've already given this lock to a client once, then we should
2520          * have no readers or writers.  Otherwise, we should have one reader
2521          * _or_ writer ref (which will be zeroed below) before returning the
2522          * lock to a client. */
2523         if (new_lock->l_export == req->rq_export) {
2524                 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
2525         } else {
2526                 LASSERT(new_lock->l_export == NULL);
2527                 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
2528         }
2529
2530         *lockp = new_lock;
2531
2532         if (new_lock->l_export == req->rq_export) {
2533                 /* Already gave this to the client, which means that we
2534                  * reconstructed a reply. */
2535                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
2536                         MSG_RESENT);
2537                 RETURN(ELDLM_LOCK_REPLACED);
2538         }
2539
2540         /* Fixup the lock to be given to the client */
2541         lock_res_and_lock(new_lock);
2542         new_lock->l_readers = 0;
2543         new_lock->l_writers = 0;
2544
2545         new_lock->l_export = class_export_get(req->rq_export);
2546         new_lock->l_blocking_ast = lock->l_blocking_ast;
2547         new_lock->l_completion_ast = lock->l_completion_ast;
2548         new_lock->l_flags &= ~LDLM_FL_LOCAL;
2549
2550         memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
2551                sizeof(lock->l_remote_handle));
2552
2553         unlock_res_and_lock(new_lock);
2554
2555         lustre_hash_add(new_lock->l_export->exp_lock_hash,
2556                         &new_lock->l_remote_handle,
2557                         &new_lock->l_exp_hash);
2558         LDLM_LOCK_PUT(new_lock);
2559
2560         RETURN(ELDLM_LOCK_REPLACED);
2561 }
2562
2563 static int mdt_setup(struct obd_device *obd, obd_count len, void *buf)
2564 {
2565         struct mds_obd *mds = &obd->u.mds;
2566         struct lprocfs_static_vars lvars;
2567         int mds_min_threads;
2568         int mds_max_threads;
2569         int rc = 0;
2570         ENTRY;
2571
2572         lprocfs_mdt_init_vars(&lvars);
2573         lprocfs_obd_setup(obd, lvars.obd_vars);
2574
2575         sema_init(&mds->mds_health_sem, 1);
2576
2577         if (mds_num_threads) {
2578                 /* If mds_num_threads is set, it is the min and the max. */
2579                 if (mds_num_threads > MDS_THREADS_MAX)
2580                         mds_num_threads = MDS_THREADS_MAX;
2581                 if (mds_num_threads < MDS_THREADS_MIN)
2582                         mds_num_threads = MDS_THREADS_MIN;
2583                 mds_max_threads = mds_min_threads = mds_num_threads;
2584         } else {
2585                 /* Base min threads on memory and cpus */
2586                 mds_min_threads = num_possible_cpus() * CFS_NUM_CACHEPAGES >>
2587                         (27 - CFS_PAGE_SHIFT);
2588                 if (mds_min_threads < MDS_THREADS_MIN)
2589                         mds_min_threads = MDS_THREADS_MIN;
2590                 /* Largest auto threads start value */
2591                 if (mds_min_threads > 32)
2592                         mds_min_threads = 32;
2593                 mds_max_threads = min(MDS_THREADS_MAX, mds_min_threads * 4);
2594         }
2595
2596         mds->mds_service =
2597                 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2598                                 MDS_MAXREPSIZE, MDS_REQUEST_PORTAL,
2599                                 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_FACTOR,
2600                                 mds_handle, LUSTRE_MDS_NAME,
2601                                 obd->obd_proc_entry, target_print_req,
2602                                 mds_min_threads, mds_max_threads, "ll_mdt",
2603                                 NULL);
2604
2605         if (!mds->mds_service) {
2606                 CERROR("failed to start service\n");
2607                 GOTO(err_lprocfs, rc = -ENOMEM);
2608         }
2609
2610         rc = ptlrpc_start_threads(obd, mds->mds_service);
2611         if (rc)
2612                 GOTO(err_thread, rc);
2613
2614         mds->mds_setattr_service =
2615                 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2616                                 MDS_MAXREPSIZE, MDS_SETATTR_PORTAL,
2617                                 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_FACTOR,
2618                                 mds_handle, "mds_setattr",
2619                                 obd->obd_proc_entry, target_print_req,
2620                                 mds_min_threads, mds_max_threads,
2621                                 "ll_mdt_attr", NULL);
2622         if (!mds->mds_setattr_service) {
2623                 CERROR("failed to start getattr service\n");
2624                 GOTO(err_thread, rc = -ENOMEM);
2625         }
2626
2627         rc = ptlrpc_start_threads(obd, mds->mds_setattr_service);
2628         if (rc)
2629                 GOTO(err_thread2, rc);
2630
2631         mds->mds_readpage_service =
2632                 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2633                                 MDS_MAXREPSIZE, MDS_READPAGE_PORTAL,
2634                                 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_FACTOR,
2635                                 mds_handle, "mds_readpage",
2636                                 obd->obd_proc_entry, target_print_req,
2637                                 MDS_THREADS_MIN_READPAGE, mds_max_threads,
2638                                 "ll_mdt_rdpg", NULL);
2639         if (!mds->mds_readpage_service) {
2640                 CERROR("failed to start readpage service\n");
2641                 GOTO(err_thread2, rc = -ENOMEM);
2642         }
2643
2644         rc = ptlrpc_start_threads(obd, mds->mds_readpage_service);
2645
2646         if (rc)
2647                 GOTO(err_thread3, rc);
2648
2649         ping_evictor_start();
2650
2651         RETURN(0);
2652
2653 err_thread3:
2654         ptlrpc_unregister_service(mds->mds_readpage_service);
2655         mds->mds_readpage_service = NULL;
2656 err_thread2:
2657         ptlrpc_unregister_service(mds->mds_setattr_service);
2658         mds->mds_setattr_service = NULL;
2659 err_thread:
2660         ptlrpc_unregister_service(mds->mds_service);
2661         mds->mds_service = NULL;
2662 err_lprocfs:
2663         lprocfs_obd_cleanup(obd);
2664         return rc;
2665 }
2666
2667 static int mdt_cleanup(struct obd_device *obd)
2668 {
2669         struct mds_obd *mds = &obd->u.mds;
2670         ENTRY;
2671
2672         ping_evictor_stop();
2673
2674         down(&mds->mds_health_sem);
2675         ptlrpc_unregister_service(mds->mds_readpage_service);
2676         ptlrpc_unregister_service(mds->mds_setattr_service);
2677         ptlrpc_unregister_service(mds->mds_service);
2678         mds->mds_readpage_service = NULL;
2679         mds->mds_setattr_service = NULL;
2680         mds->mds_service = NULL;
2681         up(&mds->mds_health_sem);
2682
2683         lprocfs_obd_cleanup(obd);
2684
2685         RETURN(0);
2686 }
2687
2688 static int mdt_health_check(struct obd_device *obd)
2689 {
2690         struct mds_obd *mds = &obd->u.mds;
2691         int rc = 0;
2692
2693         down(&mds->mds_health_sem);
2694         rc |= ptlrpc_service_health_check(mds->mds_readpage_service);
2695         rc |= ptlrpc_service_health_check(mds->mds_setattr_service);
2696         rc |= ptlrpc_service_health_check(mds->mds_service);
2697         up(&mds->mds_health_sem);
2698
2699         /*
2700          * health_check to return 0 on healthy
2701          * and 1 on unhealthy.
2702          */
2703         if(rc != 0)
2704                 rc = 1;
2705
2706         return rc;
2707 }
2708
2709 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2710                                           void *data)
2711 {
2712         struct obd_device *obd = data;
2713         struct ll_fid fid;
2714         fid.id = id;
2715         fid.generation = gen;
2716         return mds_fid2dentry(&obd->u.mds, &fid, NULL);
2717 }
2718
2719 static int mds_health_check(struct obd_device *obd)
2720 {
2721         struct obd_device_target *odt = &obd->u.obt;
2722 #ifdef USE_HEALTH_CHECK_WRITE
2723         struct mds_obd *mds = &obd->u.mds;
2724 #endif
2725         int rc = 0;
2726
2727         if (odt->obt_sb->s_flags & MS_RDONLY)
2728                 rc = 1;
2729
2730 #ifdef USE_HEALTH_CHECK_WRITE
2731         LASSERT(mds->mds_obt.obt_health_check_filp != NULL);
2732         rc |= !!lvfs_check_io_health(obd, mds->mds_obt.obt_health_check_filp);
2733 #endif
2734
2735         return rc;
2736 }
2737
2738 static int mds_process_config(struct obd_device *obd, obd_count len, void *buf)
2739 {
2740         struct lustre_cfg *lcfg = buf;
2741         int rc = 0;
2742
2743         switch(lcfg->lcfg_command) {
2744         case LCFG_PARAM: {
2745                 struct lprocfs_static_vars lvars;
2746                 lprocfs_mds_init_vars(&lvars);
2747
2748                 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars, lcfg, obd);
2749                 break;
2750         }
2751         default:
2752                 break;
2753         }
2754
2755         return(rc);
2756 }
2757
2758 struct lvfs_callback_ops mds_lvfs_ops = {
2759         l_fid2dentry:     mds_lvfs_fid2dentry,
2760 };
2761
2762 /* use obd ops to offer management infrastructure */
2763 static struct obd_ops mds_obd_ops = {
2764         .o_owner           = THIS_MODULE,
2765         .o_connect         = mds_connect,
2766         .o_reconnect       = mds_reconnect,
2767         .o_init_export     = mds_init_export,
2768         .o_destroy_export  = mds_destroy_export,
2769         .o_disconnect      = mds_disconnect,
2770         .o_setup           = mds_setup,
2771         .o_precleanup      = mds_precleanup,
2772         .o_cleanup         = mds_cleanup,
2773         .o_postrecov       = mds_postrecov,
2774         .o_statfs          = mds_obd_statfs,
2775         .o_iocontrol       = mds_iocontrol,
2776         .o_create          = mds_obd_create,
2777         .o_destroy         = mds_obd_destroy,
2778         .o_llog_init       = mds_llog_init,
2779         .o_llog_finish     = mds_llog_finish,
2780         .o_notify          = mds_notify,
2781         .o_health_check    = mds_health_check,
2782         .o_process_config  = mds_process_config,
2783 };
2784
2785 static struct obd_ops mdt_obd_ops = {
2786         .o_owner           = THIS_MODULE,
2787         .o_setup           = mdt_setup,
2788         .o_cleanup         = mdt_cleanup,
2789         .o_health_check    = mdt_health_check,
2790 };
2791
2792 quota_interface_t *mds_quota_interface_ref;
2793 extern quota_interface_t mds_quota_interface;
2794
2795 static int __init mds_init(void)
2796 {
2797         int rc;
2798         struct lprocfs_static_vars lvars;
2799
2800         request_module("lquota");
2801         mds_quota_interface_ref = PORTAL_SYMBOL_GET(mds_quota_interface);
2802         rc = lquota_init(mds_quota_interface_ref);
2803         if (rc) {
2804                 if (mds_quota_interface_ref)
2805                         PORTAL_SYMBOL_PUT(mds_quota_interface);
2806                 return rc;
2807         }
2808         init_obd_quota_ops(mds_quota_interface_ref, &mds_obd_ops);
2809
2810         lprocfs_mds_init_vars(&lvars);
2811         class_register_type(&mds_obd_ops, lvars.module_vars, LUSTRE_MDS_NAME);
2812         lprocfs_mdt_init_vars(&lvars);
2813         class_register_type(&mdt_obd_ops, lvars.module_vars, LUSTRE_MDT_NAME);
2814
2815         return 0;
2816 }
2817
2818 static void /*__exit*/ mds_exit(void)
2819 {
2820         lquota_exit(mds_quota_interface_ref);
2821         if (mds_quota_interface_ref)
2822                 PORTAL_SYMBOL_PUT(mds_quota_interface);
2823
2824         class_unregister_type(LUSTRE_MDS_NAME);
2825         class_unregister_type(LUSTRE_MDT_NAME);
2826 }
2827
2828 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2829 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
2830 MODULE_LICENSE("GPL");
2831
2832 module_init(mds_init);
2833 module_exit(mds_exit);