lustre/lvfs/fsfilt_ext3.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/lib/fsfilt_ext3.c
   5  *  Lustre filesystem abstraction routines
   6  *
   7  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   8  *   Author: Andreas Dilger <adilger@clusterfs.com>
   9  *
  10  *   This file is part of Lustre, http://www.lustre.org.
  11  *
  12  *   Lustre is free software; you can redistribute it and/or
  13  *   modify it under the terms of version 2 of the GNU General Public
  14  *   License as published by the Free Software Foundation.
  15  *
  16  *   Lustre is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *   GNU General Public License for more details.
  20  *
  21  *   You should have received a copy of the GNU General Public License
  22  *   along with Lustre; if not, write to the Free Software
  23  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #define DEBUG_SUBSYSTEM S_FILTER
  27
  28 #include <linux/init.h>
  29 #include <linux/module.h>
  30 #include <linux/fs.h>
  31 #include <linux/jbd.h>
  32 #include <linux/slab.h>
  33 #include <linux/pagemap.h>
  34 #include <linux/quotaops.h>
  35 #include <linux/ext3_fs.h>
  36 #include <linux/ext3_jbd.h>
  37 #include <linux/version.h>
  38 #include <linux/bitops.h>
  39 #include <linux/quota.h>
  40 #include <linux/quotaio_v1.h>
  41 #include <linux/quotaio_v2.h>
  42 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  43 #include <linux/ext3_xattr.h>
  44 #else
  45 #include <ext3/xattr.h>
  46 #endif
  47
  48 #include <libcfs/kp30.h>
  49 #include <lustre_fsfilt.h>
  50 #include <obd.h>
  51 #include <obd_class.h>
  52 #include <lustre_quota.h>
  53 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  54 #include <linux/iobuf.h>
  55 #endif
  56 #include <linux/lustre_compat25.h>
  57 #include <linux/lprocfs_status.h>
  58
  59 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
  60 #include <linux/ext3_extents.h>
  61 #endif
  62
  63 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
  64 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS
  65 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS
  66 #else
  67 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS(sb)
  68 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS(sb)
  69 #endif
  70
  71 static kmem_cache_t *fcb_cache;
  72
  73 struct fsfilt_cb_data {
  74         struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
  75         fsfilt_cb_t cb_func;            /* MDS/OBD completion function */
  76         struct obd_device *cb_obd;      /* MDS/OBD completion device */
  77         __u64 cb_last_rcvd;             /* MDS/OST last committed operation */
  78         void *cb_data;                  /* MDS/OST completion function data */
  79 };
  80
  81 #ifndef EXT3_XATTR_INDEX_TRUSTED        /* temporary until we hit l28 kernel */
  82 #define EXT3_XATTR_INDEX_TRUSTED        4
  83 #endif
  84
  85 static char *fsfilt_ext3_get_label(struct super_block *sb)
  86 {
  87         return EXT3_SB(sb)->s_es->s_volume_name;
  88 }
  89
  90 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
  91 {
  92         /* see e.g. fsfilt_ext3_write_record() */
  93         journal_t *journal;
  94         handle_t *handle;
  95         int err;
  96
  97         journal = EXT3_SB(sb)->s_journal;
  98         lock_24kernel();
  99         handle = journal_start(journal, 1);
 100         unlock_24kernel();
 101         if (IS_ERR(handle)) {
 102                 CERROR("can't start transaction\n");
 103                 return(PTR_ERR(handle));
 104         }
 105
 106         err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
 107         if (err)
 108                 goto out;
 109
 110         memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
 111                sizeof(EXT3_SB(sb)->s_es->s_volume_name));
 112
 113         err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
 114
 115 out:
 116         lock_24kernel();
 117         journal_stop(handle);
 118         unlock_24kernel();
 119
 120         return(err);
 121 }
 122
 123 static char *fsfilt_ext3_uuid(struct super_block *sb)
 124 {
 125         return EXT3_SB(sb)->s_es->s_uuid;
 126 }
 127
 128 /*
 129  * We don't currently need any additional blocks for rmdir and
 130  * unlink transactions because we are storing the OST oa_id inside
 131  * the inode (which we will be changing anyways as part of this
 132  * transaction).
 133  */
 134 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
 135                                int logs)
 136 {
 137         /* For updates to the last received file */
 138         int nblocks = EXT3_SINGLEDATA_TRANS_BLOCKS;
 139         journal_t *journal;
 140         void *handle;
 141
 142         if (current->journal_info) {
 143                 CDEBUG(D_INODE, "increasing refcount on %p\n",
 144                        current->journal_info);
 145                 goto journal_start;
 146         }
 147
 148         switch(op) {
 149         case FSFILT_OP_RMDIR:
 150         case FSFILT_OP_UNLINK:
 151                 /* delete one file + create/update logs for each stripe */
 152                 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 153                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 154                             EXT3_SINGLEDATA_TRANS_BLOCKS) * logs;
 155                 break;
 156         case FSFILT_OP_RENAME:
 157                 /* modify additional directory */
 158                 nblocks += EXT3_SINGLEDATA_TRANS_BLOCKS;
 159                 /* no break */
 160         case FSFILT_OP_SYMLINK:
 161                 /* additional block + block bitmap + GDT for long symlink */
 162                 nblocks += 3;
 163                 /* no break */
 164         case FSFILT_OP_CREATE: {
 165 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL)
 166                 static int warned;
 167                 if (!warned) {
 168                         if (!test_opt(inode->i_sb, EXTENTS)) {
 169                                 warned = 1;
 170                         } else if (((EXT3_I(inode)->i_flags &
 171                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
 172                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
 173                                 CWARN("extent-mapped directory found - contact "
 174                                       "CFS: support@clusterfs.com\n");
 175                                 warned = 1;
 176                         }
 177                 }
 178 #endif
 179                 /* no break */
 180         }
 181         case FSFILT_OP_MKDIR:
 182         case FSFILT_OP_MKNOD:
 183                 /* modify one inode + block bitmap + GDT */
 184                 nblocks += 3;
 185                 /* no break */
 186         case FSFILT_OP_LINK:
 187                 /* modify parent directory */
 188                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 189                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 190                 /* create/update logs for each stripe */
 191                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 192                             EXT3_SINGLEDATA_TRANS_BLOCKS) * logs;
 193                 break;
 194         case FSFILT_OP_SETATTR:
 195                 /* Setattr on inode */
 196                 nblocks += 1;
 197                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 198                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 199                 /* quota chown log for each stripe */
 200                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 201                             EXT3_SINGLEDATA_TRANS_BLOCKS) * logs;
 202                 break;
 203         case FSFILT_OP_CANCEL_UNLINK:
 204                 /* blocks for log header bitmap update OR
 205                  * blocks for catalog header bitmap update + unlink of logs */
 206                 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
 207                         FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
 208                 break;
 209         case FSFILT_OP_JOIN:
 210                 /* delete 2 file(file + array id) + create 1 file (array id)
 211                  * create/update logs for each stripe */
 212                 nblocks += 2 * FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 213
 214                 /*create array log for head file*/
 215                 nblocks += 3;
 216                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 217                             EXT3_SINGLEDATA_TRANS_BLOCKS);
 218                 /*update head file array */
 219                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 220                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 221                 break;
 222         default: CERROR("unknown transaction start op %d\n", op);
 223                 LBUG();
 224         }
 225
 226         LASSERT(current->journal_info == desc_private);
 227         journal = EXT3_SB(inode->i_sb)->s_journal;
 228         if (nblocks > journal->j_max_transaction_buffers) {
 229                 CWARN("too many credits %d for op %ux%u using %d instead\n",
 230                       nblocks, op, logs, journal->j_max_transaction_buffers);
 231                 nblocks = journal->j_max_transaction_buffers;
 232         }
 233
 234  journal_start:
 235         LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
 236         lock_24kernel();
 237         handle = journal_start(EXT3_JOURNAL(inode), nblocks);
 238         unlock_24kernel();
 239
 240         if (!IS_ERR(handle))
 241                 LASSERT(current->journal_info == handle);
 242         else
 243                 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
 244                        op, nblocks, PTR_ERR(handle));
 245         return handle;
 246 }
 247
 248 /*
 249  * Calculate the number of buffer credits needed to write multiple pages in
 250  * a single ext3 transaction.  No, this shouldn't be here, but as yet ext3
 251  * doesn't have a nice API for calculating this sort of thing in advance.
 252  *
 253  * See comment above ext3_writepage_trans_blocks for details.  We assume
 254  * no data journaling is being done, but it does allow for all of the pages
 255  * being non-contiguous.  If we are guaranteed contiguous pages we could
 256  * reduce the number of (d)indirect blocks a lot.
 257  *
 258  * With N blocks per page and P pages, for each inode we have at most:
 259  * N*P indirect
 260  * min(N*P, blocksize/4 + 1) dindirect blocks
 261  * niocount tindirect
 262  *
 263  * For the entire filesystem, we have at most:
 264  * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
 265  * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
 266  * objcount inode blocks
 267  * 1 superblock
 268  * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
 269  *
 270  * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
 271  */
 272 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
 273                                       int niocount, struct niobuf_local *nb)
 274 {
 275         struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
 276         __u64 next_indir;
 277         const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
 278         int nbitmaps = 0, ngdblocks;
 279         int needed = objcount + 1; /* inodes + superblock */
 280         int i, j;
 281
 282         for (i = 0, j = 0; i < objcount; i++, fso++) {
 283                 /* two or more dindirect blocks in case we cross boundary */
 284                 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
 285                                     nb[j].offset) >>
 286                                    sb->s_blocksize_bits) /
 287                         (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
 288                 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
 289
 290                 /* leaf, indirect, tindirect blocks for first block */
 291                 nbitmaps += blockpp + 2;
 292
 293                 j += fso->fso_bufcnt;
 294         }
 295
 296         next_indir = nb[0].offset +
 297                 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
 298         for (i = 1; i < niocount; i++) {
 299                 if (nb[i].offset >= next_indir) {
 300                         nbitmaps++;     /* additional indirect */
 301                         next_indir = nb[i].offset +
 302                                 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
 303                 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
 304                         nbitmaps++;     /* additional indirect */
 305                 }
 306                 nbitmaps += blockpp;    /* each leaf in different group? */
 307         }
 308
 309         ngdblocks = nbitmaps;
 310         if (nbitmaps > EXT3_SB(sb)->s_groups_count)
 311                 nbitmaps = EXT3_SB(sb)->s_groups_count;
 312         if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
 313                 ngdblocks = EXT3_SB(sb)->s_gdb_count;
 314
 315         needed += nbitmaps + ngdblocks;
 316
 317         /* last_rcvd update */
 318         needed += FSFILT_DATA_TRANS_BLOCKS(sb);
 319
 320 #if defined(CONFIG_QUOTA)
 321         /* We assume that there will be 1 bit set in s_dquot.flags for each
 322          * quota file that is active.  This is at least true for now.
 323          */
 324         needed += hweight32(sb_any_quota_enabled(sb)) *
 325                 EXT3_SINGLEDATA_TRANS_BLOCKS;
 326 #endif
 327
 328         return needed;
 329 }
 330
 331 /* We have to start a huge journal transaction here to hold all of the
 332  * metadata for the pages being written here.  This is necessitated by
 333  * the fact that we do lots of prepare_write operations before we do
 334  * any of the matching commit_write operations, so even if we split
 335  * up to use "smaller" transactions none of them could complete until
 336  * all of them were opened.  By having a single journal transaction,
 337  * we eliminate duplicate reservations for common blocks like the
 338  * superblock and group descriptors or bitmaps.
 339  *
 340  * We will start the transaction here, but each prepare_write will
 341  * add a refcount to the transaction, and each commit_write will
 342  * remove a refcount.  The transaction will be closed when all of
 343  * the pages have been written.
 344  */
 345 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
 346                                    int niocount, struct niobuf_local *nb,
 347                                    void *desc_private, int logs)
 348 {
 349         journal_t *journal;
 350         handle_t *handle;
 351         int needed;
 352         ENTRY;
 353
 354         LASSERT(current->journal_info == desc_private);
 355         journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
 356         needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
 357
 358         /* The number of blocks we could _possibly_ dirty can very large.
 359          * We reduce our request if it is absurd (and we couldn't get that
 360          * many credits for a single handle anyways).
 361          *
 362          * At some point we have to limit the size of I/Os sent at one time,
 363          * increase the size of the journal, or we have to calculate the
 364          * actual journal requirements more carefully by checking all of
 365          * the blocks instead of being maximally pessimistic.  It remains to
 366          * be seen if this is a real problem or not.
 367          */
 368         if (needed > journal->j_max_transaction_buffers) {
 369                 CERROR("want too many journal credits (%d) using %d instead\n",
 370                        needed, journal->j_max_transaction_buffers);
 371                 needed = journal->j_max_transaction_buffers;
 372         }
 373
 374         LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
 375         lock_24kernel();
 376         handle = journal_start(journal, needed);
 377         unlock_24kernel();
 378         if (IS_ERR(handle)) {
 379                 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
 380                        PTR_ERR(handle));
 381         } else {
 382                 LASSERT(handle->h_buffer_credits >= needed);
 383                 LASSERT(current->journal_info == handle);
 384         }
 385
 386         RETURN(handle);
 387 }
 388
 389 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
 390 {
 391        handle_t *handle = h;
 392
 393        /* fsfilt_extend called with nblocks = 0 for testing in special cases */
 394        if (nblocks == 0) {
 395                handle->h_buffer_credits = 0;
 396                CWARN("setting credits of handle %p to zero by request\n", h);
 397        }
 398
 399        if (handle->h_buffer_credits > nblocks)
 400                 return 0;
 401        if (journal_extend(handle, nblocks) == 0)
 402                 return 0;
 403
 404        ext3_mark_inode_dirty(handle, inode);
 405        return journal_restart(handle, nblocks);
 406 }
 407
 408 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
 409 {
 410         int rc;
 411         handle_t *handle = h;
 412
 413         LASSERT(current->journal_info == handle);
 414         if (force_sync)
 415                 handle->h_sync = 1; /* recovery likes this */
 416
 417         lock_24kernel();
 418         rc = journal_stop(handle);
 419         unlock_24kernel();
 420
 421         return rc;
 422 }
 423
 424 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
 425                                     void **wait_handle)
 426 {
 427         unsigned long tid;
 428         transaction_t *transaction;
 429 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 430         unsigned long rtid;
 431 #endif
 432         handle_t *handle = h;
 433         journal_t *journal;
 434         int rc;
 435
 436         LASSERT(current->journal_info == handle);
 437
 438         lock_24kernel();
 439         transaction = handle->h_transaction;
 440         journal = transaction->t_journal;
 441         tid = transaction->t_tid;
 442         /* we don't want to be blocked */
 443         handle->h_sync = 0;
 444         rc = journal_stop(handle);
 445         if (rc) {
 446                 CERROR("error while stopping transaction: %d\n", rc);
 447                 unlock_24kernel();
 448                 return rc;
 449         }
 450 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 451         rtid = log_start_commit(journal, transaction);
 452         if (rtid != tid)
 453                 CERROR("strange race: %lu != %lu\n",
 454                        (unsigned long) tid, (unsigned long) rtid);
 455 #else
 456         log_start_commit(journal, tid);
 457 #endif
 458         unlock_24kernel();
 459
 460         *wait_handle = (void *) tid;
 461         CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
 462         return 0;
 463 }
 464
 465 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
 466 {
 467         journal_t *journal = EXT3_JOURNAL(inode);
 468         tid_t tid = (tid_t)(long)h;
 469
 470         CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
 471         if (unlikely(is_journal_aborted(journal)))
 472                 return -EIO;
 473
 474         log_wait_commit(EXT3_JOURNAL(inode), tid);
 475
 476         if (unlikely(is_journal_aborted(journal)))
 477                 return -EIO;
 478         return 0;
 479 }
 480
 481 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
 482                                struct iattr *iattr, int do_trunc)
 483 {
 484         struct inode *inode = dentry->d_inode;
 485         int rc = 0;
 486
 487         lock_kernel();
 488
 489         /* Avoid marking the inode dirty on the superblock list unnecessarily.
 490          * We are already writing the inode to disk as part of this
 491          * transaction and want to avoid a lot of extra inode writeout
 492          * later on. b=9828 */
 493         if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
 494                 /* ATTR_SIZE would invoke truncate: clear it */
 495                 iattr->ia_valid &= ~ATTR_SIZE;
 496                 EXT3_I(inode)->i_disksize = inode->i_size = iattr->ia_size;
 497
 498                 if (iattr->ia_valid & ATTR_UID)
 499                         inode->i_uid = iattr->ia_uid;
 500                 if (iattr->ia_valid & ATTR_GID)
 501                         inode->i_gid = iattr->ia_gid;
 502                 if (iattr->ia_valid & ATTR_ATIME)
 503                         inode->i_atime = iattr->ia_atime;
 504                 if (iattr->ia_valid & ATTR_MTIME)
 505                         inode->i_mtime = iattr->ia_mtime;
 506                 if (iattr->ia_valid & ATTR_CTIME)
 507                         inode->i_ctime = iattr->ia_ctime;
 508                 if (iattr->ia_valid & ATTR_MODE) {
 509                         inode->i_mode = iattr->ia_mode;
 510
 511                         if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 512                                 inode->i_mode &= ~S_ISGID;
 513                 }
 514
 515                 inode->i_sb->s_op->dirty_inode(inode);
 516
 517                 goto out;
 518         }
 519
 520         /* Don't allow setattr to change file type */
 521         if (iattr->ia_valid & ATTR_MODE)
 522                 iattr->ia_mode = (inode->i_mode & S_IFMT) |
 523                                  (iattr->ia_mode & ~S_IFMT);
 524
 525         /* We set these flags on the client, but have already checked perms
 526          * so don't confuse inode_change_ok. */
 527         iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
 528
 529         if (inode->i_op->setattr) {
 530                 rc = inode->i_op->setattr(dentry, iattr);
 531         } else {
 532                 rc = inode_change_ok(inode, iattr);
 533                 if (!rc)
 534                         rc = inode_setattr(inode, iattr);
 535         }
 536
 537  out:
 538         unlock_kernel();
 539         RETURN(rc);
 540 }
 541
 542 static int fsfilt_ext3_iocontrol(struct inode * inode, struct file *file,
 543                                  unsigned int cmd, unsigned long arg)
 544 {
 545         int rc = 0;
 546         ENTRY;
 547
 548         /* FIXME: Can't do this because of nested transaction deadlock */
 549         if (cmd == EXT3_IOC_SETFLAGS && (*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
 550                 CERROR("can't set data journal flag on file\n");
 551                 RETURN(-EPERM);
 552         }
 553
 554         if (inode->i_fop->ioctl)
 555                 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
 556         else
 557                 RETURN(-ENOTTY);
 558
 559         RETURN(rc);
 560 }
 561
 562 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
 563                               void *lmm, int lmm_size, const char *name)
 564 {
 565         int rc;
 566
 567         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 568
 569         lock_24kernel();
 570         rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
 571                                    name, lmm, lmm_size, 0);
 572
 573         unlock_24kernel();
 574
 575         if (rc)
 576                 CERROR("error adding MD data to inode %lu: rc = %d\n",
 577                        inode->i_ino, rc);
 578         return rc;
 579 }
 580
 581 /* Must be called with i_mutex held */
 582 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
 583                               const char *name)
 584 {
 585         int rc;
 586
 587         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 588         lock_24kernel();
 589
 590         rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
 591                             name, lmm, lmm_size);
 592         unlock_24kernel();
 593
 594         /* This gives us the MD size */
 595         if (lmm == NULL)
 596                 return (rc == -ENODATA) ? 0 : rc;
 597
 598         if (rc < 0) {
 599                 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
 600                        EXT3_XATTR_INDEX_TRUSTED, name,
 601                        inode->i_ino, rc);
 602                 memset(lmm, 0, lmm_size);
 603                 return (rc == -ENODATA) ? 0 : rc;
 604         }
 605
 606         return rc;
 607 }
 608
 609 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 610 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
 611 {
 612         submit_bio(rw, bio);
 613         return 0;
 614 }
 615 #else
 616 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct kiobuf *bio)
 617 {
 618         int rc, blk_per_page;
 619
 620         rc = brw_kiovec(rw, 1, &bio, inode->i_dev,
 621                         KIOBUF_GET_BLOCKS(bio), 1 << inode->i_blkbits);
 622         /*
 623          * brw_kiovec() returns number of bytes actually written. If error
 624          * occurred after something was written, error code is returned though
 625          * kiobuf->errno. (See bug 6854.)
 626          */
 627
 628         blk_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
 629
 630         if (rc != (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page) {
 631                 CERROR("short write?  expected %d, wrote %d (%d)\n",
 632                        (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page,
 633                        rc, bio->errno);
 634         }
 635         if (bio->errno != 0) {
 636                 CERROR("IO error. Wrote %d of %d (%d)\n",
 637                        rc,
 638                        (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page,
 639                        bio->errno);
 640                 rc = bio->errno;
 641         }
 642
 643         return rc;
 644 }
 645 #endif
 646
 647 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
 648                                     loff_t *off)
 649 {
 650         struct inode *inode = file->f_dentry->d_inode;
 651         int rc = 0;
 652
 653         if (S_ISREG(inode->i_mode))
 654                 rc = file->f_op->read(file, buf, count, off);
 655         else {
 656                 const int blkbits = inode->i_sb->s_blocksize_bits;
 657                 const int blksize = inode->i_sb->s_blocksize;
 658
 659                 CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
 660                        count, inode->i_ino, *off);
 661                 while (count > 0) {
 662                         struct buffer_head *bh;
 663
 664                         bh = NULL;
 665                         if (*off < inode->i_size) {
 666                                 int err = 0;
 667
 668                                 bh = ext3_bread(NULL, inode, *off >> blkbits,
 669                                                 0, &err);
 670
 671                                 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
 672
 673                                 if (bh) {
 674                                         memcpy(buf, bh->b_data, blksize);
 675                                         brelse(bh);
 676                                 } else if (err) {
 677                                         /* XXX in theory we should just fake
 678                                          * this buffer and continue like ext3,
 679                                          * especially if this is a partial read
 680                                          */
 681                                         CERROR("error read dir %lu+%llu: %d\n",
 682                                                inode->i_ino, *off, err);
 683                                         RETURN(err);
 684                                 }
 685                         }
 686                         if (!bh) {
 687                                 struct ext3_dir_entry_2 *fake = (void *)buf;
 688
 689                                 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
 690                                 memset(fake, 0, sizeof(*fake));
 691                                 fake->rec_len = cpu_to_le16(blksize);
 692                         }
 693                         count -= blksize;
 694                         buf += blksize;
 695                         *off += blksize;
 696                         rc += blksize;
 697                 }
 698         }
 699
 700         return rc;
 701 }
 702
 703 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
 704 {
 705         struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
 706
 707         fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
 708
 709         OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
 710 }
 711
 712 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
 713                                       void *handle, fsfilt_cb_t cb_func,
 714                                       void *cb_data)
 715 {
 716         struct fsfilt_cb_data *fcb;
 717
 718         OBD_SLAB_ALLOC(fcb, fcb_cache, GFP_NOFS, sizeof *fcb);
 719         if (fcb == NULL)
 720                 RETURN(-ENOMEM);
 721
 722         fcb->cb_func = cb_func;
 723         fcb->cb_obd = obd;
 724         fcb->cb_last_rcvd = last_rcvd;
 725         fcb->cb_data = cb_data;
 726
 727         CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
 728         lock_24kernel();
 729         journal_callback_set(handle, fsfilt_ext3_cb_func,
 730                              (struct journal_callback *)fcb);
 731         unlock_24kernel();
 732
 733         return 0;
 734 }
 735
 736 /*
 737  * We need to hack the return value for the free inode counts because
 738  * the current EA code requires one filesystem block per inode with EAs,
 739  * so it is possible to run out of blocks before we run out of inodes.
 740  *
 741  * This can be removed when the ext3 EA code is fixed.
 742  */
 743 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
 744 {
 745         struct kstatfs sfs;
 746         int rc;
 747
 748         memset(&sfs, 0, sizeof(sfs));
 749         rc = ll_do_statfs(sb,&sfs);
 750
 751         if (!rc && sfs.f_bfree < sfs.f_ffree) {
 752                 sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
 753                 sfs.f_ffree = sfs.f_bfree;
 754         }
 755
 756         statfs_pack(osfs, &sfs);
 757         return rc;
 758 }
 759
 760 static int fsfilt_ext3_sync(struct super_block *sb)
 761 {
 762         return ext3_force_commit(sb);
 763 }
 764
 765 #if defined(EXT3_MULTIBLOCK_ALLOCATOR) && (!defined(EXT3_EXT_CACHE_NO) || defined(EXT_CACHE_MARK))
 766 #warning "kernel code has old extents/mballoc patch, disabling"
 767 #undef EXT3_MULTIBLOCK_ALLOCATOR
 768 #endif
 769 #ifndef EXT3_EXTENTS_FL
 770 #define EXT3_EXTENTS_FL                 0x00080000 /* Inode uses extents */
 771 #endif
 772
 773 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
 774 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 775 #define ext3_up_truncate_sem(inode)  up_write(&EXT3_I(inode)->truncate_sem);
 776 #define ext3_down_truncate_sem(inode)  down_write(&EXT3_I(inode)->truncate_sem);
 777 #elif (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 778 #define ext3_up_truncate_sem(inode)  up(&EXT3_I(inode)->truncate_sem);
 779 #define ext3_down_truncate_sem(inode)  down(&EXT3_I(inode)->truncate_sem);
 780 #else
 781 #define ext3_up_truncate_sem(inode)  mutex_unlock(&EXT3_I(inode)->truncate_mutex);
 782 #define ext3_down_truncate_sem(inode)  mutex_lock(&EXT3_I(inode)->truncate_mutex);
 783 #endif
 784
 785 #include <linux/lustre_version.h>
 786 #if EXT3_EXT_MAGIC == 0xf301
 787 #define ee_start e_start
 788 #define ee_block e_block
 789 #define ee_len   e_num
 790 #endif
 791 #ifndef EXT3_BB_MAX_BLOCKS
 792 #define ext3_mb_new_blocks(handle, inode, goal, count, aflags, err) \
 793         ext3_new_blocks(handle, inode, count, goal, err)
 794 #endif
 795
 796 struct bpointers {
 797         unsigned long *blocks;
 798         int *created;
 799         unsigned long start;
 800         int num;
 801         int init_num;
 802         int create;
 803 };
 804
 805 static int ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
 806                               unsigned long block, int *aflags)
 807 {
 808         struct ext3_inode_info *ei = EXT3_I(inode);
 809         unsigned long bg_start;
 810         unsigned long colour;
 811         int depth;
 812
 813         if (path) {
 814                 struct ext3_extent *ex;
 815                 depth = path->p_depth;
 816
 817                 /* try to predict block placement */
 818                 if ((ex = path[depth].p_ext)) {
 819 #if 0
 820                         /* This prefers to eat into a contiguous extent
 821                          * rather than find an extent that the whole
 822                          * request will fit into.  This can fragment data
 823                          * block allocation and prevents our lovely 1M I/Os
 824                          * from reaching the disk intact. */
 825                         if (ex->ee_block + ex->ee_len == block)
 826                                 *aflags |= 1;
 827 #endif
 828                         return ex->ee_start + (block - ex->ee_block);
 829                 }
 830
 831                 /* it looks index is empty
 832                  * try to find starting from index itself */
 833                 if (path[depth].p_bh)
 834                         return path[depth].p_bh->b_blocknr;
 835         }
 836
 837         /* OK. use inode's group */
 838         bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
 839                 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
 840         colour = (current->pid % 16) *
 841                 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
 842         return bg_start + colour + block;
 843 }
 844
 845 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 846 #include <linux/locks.h>
 847 static void ll_unmap_underlying_metadata(struct super_block *sb,
 848                                          unsigned long blocknr)
 849 {
 850         struct buffer_head *old_bh;
 851
 852         old_bh = get_hash_table(sb->s_dev, blocknr, sb->s_blocksize);
 853         if (old_bh) {
 854                 mark_buffer_clean(old_bh);
 855                 wait_on_buffer(old_bh);
 856                 clear_bit(BH_Req, &old_bh->b_state);
 857                 __brelse(old_bh);
 858         }
 859 }
 860 #else
 861 #define ll_unmap_underlying_metadata(sb, blocknr) \
 862         unmap_underlying_metadata((sb)->s_bdev, blocknr)
 863 #endif
 864
 865 static int ext3_ext_new_extent_cb(struct ext3_extents_tree *tree,
 866                                   struct ext3_ext_path *path,
 867                                   struct ext3_ext_cache *cex)
 868 {
 869         struct inode *inode = tree->inode;
 870         struct bpointers *bp = tree->private;
 871         struct ext3_extent nex;
 872         int count, err, goal;
 873         unsigned long pblock;
 874         unsigned long tgen;
 875         handle_t *handle;
 876         int i, aflags = 0;
 877
 878         i = EXT_DEPTH(tree);
 879         EXT_ASSERT(i == path->p_depth);
 880         EXT_ASSERT(path[i].p_hdr);
 881
 882         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
 883                 err = EXT_CONTINUE;
 884                 goto map;
 885         }
 886
 887         if (bp->create == 0) {
 888                 i = 0;
 889                 if (cex->ec_block < bp->start)
 890                         i = bp->start - cex->ec_block;
 891                 if (i >= cex->ec_len)
 892                         CERROR("nothing to do?! i = %d, e_num = %u\n",
 893                                         i, cex->ec_len);
 894                 for (; i < cex->ec_len && bp->num; i++) {
 895                         *(bp->created) = 0;
 896                         bp->created++;
 897                         *(bp->blocks) = 0;
 898                         bp->blocks++;
 899                         bp->num--;
 900                         bp->start++;
 901                 }
 902
 903                 return EXT_CONTINUE;
 904         }
 905
 906         tgen = EXT_GENERATION(tree);
 907         count = ext3_ext_calc_credits_for_insert(tree, path);
 908         ext3_up_truncate_sem(inode);
 909
 910         lock_24kernel();
 911         handle = journal_start(EXT3_JOURNAL(inode), count+EXT3_ALLOC_NEEDED+1);
 912         unlock_24kernel();
 913         if (IS_ERR(handle)) {
 914                 ext3_down_truncate_sem(inode);
 915                 return PTR_ERR(handle);
 916         }
 917
 918         ext3_down_truncate_sem(inode);
 919         if (tgen != EXT_GENERATION(tree)) {
 920                 /* the tree has changed. so path can be invalid at moment */
 921                 lock_24kernel();
 922                 journal_stop(handle);
 923                 unlock_24kernel();
 924                 return EXT_REPEAT;
 925         }
 926
 927         count = cex->ec_len;
 928         goal = ext3_ext_find_goal(inode, path, cex->ec_block, &aflags);
 929         aflags |= 2; /* block have been already reserved */
 930         lock_24kernel();
 931         pblock = ext3_mb_new_blocks(handle, inode, goal, &count, aflags, &err);
 932         unlock_24kernel();
 933         if (!pblock)
 934                 goto out;
 935         EXT_ASSERT(count <= cex->ec_len);
 936
 937         /* insert new extent */
 938         nex.ee_block = cex->ec_block;
 939         nex.ee_start = pblock;
 940         nex.ee_len = count;
 941         err = ext3_ext_insert_extent(handle, tree, path, &nex);
 942         if (err)
 943                 goto out;
 944
 945         /*
 946          * Putting len of the actual extent we just inserted,
 947          * we are asking ext3_ext_walk_space() to continue
 948          * scaning after that block
 949          */
 950         cex->ec_len = nex.ee_len;
 951         cex->ec_start = nex.ee_start;
 952         BUG_ON(nex.ee_len == 0);
 953         BUG_ON(nex.ee_block != cex->ec_block);
 954
 955 out:
 956         lock_24kernel();
 957         journal_stop(handle);
 958         unlock_24kernel();
 959 map:
 960         if (err >= 0) {
 961                 /* map blocks */
 962                 if (bp->num == 0) {
 963                         CERROR("hmm. why do we find this extent?\n");
 964                         CERROR("initial space: %lu:%u\n",
 965                                 bp->start, bp->init_num);
 966                         CERROR("current extent: %u/%u/%u %d\n",
 967                                 cex->ec_block, cex->ec_len,
 968                                 cex->ec_start, cex->ec_type);
 969                 }
 970                 i = 0;
 971                 if (cex->ec_block < bp->start)
 972                         i = bp->start - cex->ec_block;
 973                 if (i >= cex->ec_len)
 974                         CERROR("nothing to do?! i = %d, e_num = %u\n",
 975                                         i, cex->ec_len);
 976                 for (; i < cex->ec_len && bp->num; i++) {
 977                         *(bp->blocks) = cex->ec_start + i;
 978                         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
 979                                 *(bp->created) = 0;
 980                         } else {
 981                                 *(bp->created) = 1;
 982                                 /* unmap any possible underlying metadata from
 983                                  * the block device mapping.  bug 6998. */
 984                                 ll_unmap_underlying_metadata(inode->i_sb,
 985                                                              *(bp->blocks));
 986                         }
 987                         bp->created++;
 988                         bp->blocks++;
 989                         bp->num--;
 990                         bp->start++;
 991                 }
 992         }
 993         return err;
 994 }
 995
 996 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
 997                        unsigned long num, unsigned long *blocks,
 998                        int *created, int create)
 999 {
1000         struct ext3_extents_tree tree;
1001         struct bpointers bp;
1002         int err;
1003
1004         CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1005                block, block + num - 1, (unsigned) inode->i_ino);
1006
1007         ext3_init_tree_desc(&tree, inode);
1008         tree.private = &bp;
1009         bp.blocks = blocks;
1010         bp.created = created;
1011         bp.start = block;
1012         bp.init_num = bp.num = num;
1013         bp.create = create;
1014
1015         ext3_down_truncate_sem(inode);
1016         err = ext3_ext_walk_space(&tree, block, num, ext3_ext_new_extent_cb);
1017         ext3_ext_invalidate_cache(&tree);
1018         ext3_up_truncate_sem(inode);
1019
1020         return err;
1021 }
1022
1023 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1024                                     int pages, unsigned long *blocks,
1025                                     int *created, int create)
1026 {
1027         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1028         int rc = 0, i = 0;
1029         struct page *fp = NULL;
1030         int clen = 0;
1031
1032         CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1033                 inode->i_ino, pages, (*page)->index);
1034
1035         /* pages are sorted already. so, we just have to find
1036          * contig. space and process them properly */
1037         while (i < pages) {
1038                 if (fp == NULL) {
1039                         /* start new extent */
1040                         fp = *page++;
1041                         clen = 1;
1042                         i++;
1043                         continue;
1044                 } else if (fp->index + clen == (*page)->index) {
1045                         /* continue the extent */
1046                         page++;
1047                         clen++;
1048                         i++;
1049                         continue;
1050                 }
1051
1052                 /* process found extent */
1053                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1054                                         clen * blocks_per_page, blocks,
1055                                         created, create);
1056                 if (rc)
1057                         GOTO(cleanup, rc);
1058
1059                 /* look for next extent */
1060                 fp = NULL;
1061                 blocks += blocks_per_page * clen;
1062                 created += blocks_per_page * clen;
1063         }
1064
1065         if (fp)
1066                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1067                                         clen * blocks_per_page, blocks,
1068                                         created, create);
1069 cleanup:
1070         return rc;
1071 }
1072 #endif /* EXT3_MULTIBLOCK_ALLOCATOR */
1073
1074 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1075                                unsigned long *blocks, int *created, int create);
1076 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1077                                    int pages, unsigned long *blocks,
1078                                    int *created, int create)
1079 {
1080         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1081         unsigned long *b;
1082         int rc = 0, i, *cr;
1083
1084         for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1085                 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1086                 if (rc) {
1087                         CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1088                                inode->i_ino, *b, *cr, create, rc);
1089                         break;
1090                 }
1091
1092                 b += blocks_per_page;
1093                 cr += blocks_per_page;
1094         }
1095         return rc;
1096 }
1097
1098 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1099                                 int pages, unsigned long *blocks,
1100                                 int *created, int create,
1101                                 struct semaphore *optional_sem)
1102 {
1103         int rc;
1104 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
1105         if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1106                 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1107                                                      blocks, created, create);
1108                 return rc;
1109         }
1110 #endif
1111         if (optional_sem != NULL)
1112                 down(optional_sem);
1113         rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1114                                             created, create);
1115         if (optional_sem != NULL)
1116                 up(optional_sem);
1117
1118         return rc;
1119 }
1120
1121 extern int ext3_prep_san_write(struct inode *inode, long *blocks,
1122                                int nblocks, loff_t newsize);
1123 static int fsfilt_ext3_prep_san_write(struct inode *inode, long *blocks,
1124                                       int nblocks, loff_t newsize)
1125 {
1126         return ext3_prep_san_write(inode, blocks, nblocks, newsize);
1127 }
1128
1129 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1130                                    int size, loff_t *offs)
1131 {
1132         struct inode *inode = file->f_dentry->d_inode;
1133         unsigned long block;
1134         struct buffer_head *bh;
1135         int err, blocksize, csize, boffs;
1136
1137         /* prevent reading after eof */
1138         lock_kernel();
1139         if (inode->i_size < *offs + size) {
1140                 size = inode->i_size - *offs;
1141                 unlock_kernel();
1142                 if (size < 0) {
1143                         CERROR("size %llu is too short for read %u@%llu\n",
1144                                inode->i_size, size, *offs);
1145                         return -EIO;
1146                 } else if (size == 0) {
1147                         return 0;
1148                 }
1149         } else {
1150                 unlock_kernel();
1151         }
1152
1153         blocksize = 1 << inode->i_blkbits;
1154
1155         while (size > 0) {
1156                 block = *offs >> inode->i_blkbits;
1157                 boffs = *offs & (blocksize - 1);
1158                 csize = min(blocksize - boffs, size);
1159                 bh = ext3_bread(NULL, inode, block, 0, &err);
1160                 if (!bh) {
1161                         CERROR("can't read block: %d\n", err);
1162                         return err;
1163                 }
1164
1165                 memcpy(buf, bh->b_data + boffs, csize);
1166                 brelse(bh);
1167
1168                 *offs += csize;
1169                 buf += csize;
1170                 size -= csize;
1171         }
1172         return 0;
1173 }
1174
1175 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1176                                     loff_t *offs, int force_sync)
1177 {
1178         struct buffer_head *bh = NULL;
1179         unsigned long block;
1180         struct inode *inode = file->f_dentry->d_inode;
1181         loff_t old_size = inode->i_size, offset = *offs;
1182         loff_t new_size = inode->i_size;
1183         journal_t *journal;
1184         handle_t *handle;
1185         int err, block_count = 0, blocksize, size, boffs;
1186
1187         /* Determine how many transaction credits are needed */
1188         blocksize = 1 << inode->i_blkbits;
1189         block_count = (*offs & (blocksize - 1)) + bufsize;
1190         block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1191
1192         journal = EXT3_SB(inode->i_sb)->s_journal;
1193         lock_24kernel();
1194         handle = journal_start(journal,
1195                                block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1196         unlock_24kernel();
1197         if (IS_ERR(handle)) {
1198                 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1199                        block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1200                 return PTR_ERR(handle);
1201         }
1202
1203         while (bufsize > 0) {
1204                 if (bh != NULL)
1205                         brelse(bh);
1206
1207                 block = offset >> inode->i_blkbits;
1208                 boffs = offset & (blocksize - 1);
1209                 size = min(blocksize - boffs, bufsize);
1210                 bh = ext3_bread(handle, inode, block, 1, &err);
1211                 if (!bh) {
1212                         CERROR("can't read/create block: %d\n", err);
1213                         goto out;
1214                 }
1215
1216                 err = ext3_journal_get_write_access(handle, bh);
1217                 if (err) {
1218                         CERROR("journal_get_write_access() returned error %d\n",
1219                                err);
1220                         goto out;
1221                 }
1222                 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1223                 memcpy(bh->b_data + boffs, buf, size);
1224                 err = ext3_journal_dirty_metadata(handle, bh);
1225                 if (err) {
1226                         CERROR("journal_dirty_metadata() returned error %d\n",
1227                                err);
1228                         goto out;
1229                 }
1230                 if (offset + size > new_size)
1231                         new_size = offset + size;
1232                 offset += size;
1233                 bufsize -= size;
1234                 buf += size;
1235         }
1236
1237         if (force_sync)
1238                 handle->h_sync = 1; /* recovery likes this */
1239 out:
1240         if (bh)
1241                 brelse(bh);
1242
1243         /* correct in-core and on-disk sizes */
1244         if (new_size > inode->i_size) {
1245                 lock_kernel();
1246                 if (new_size > inode->i_size)
1247                         inode->i_size = new_size;
1248                 if (inode->i_size > EXT3_I(inode)->i_disksize)
1249                         EXT3_I(inode)->i_disksize = inode->i_size;
1250                 if (inode->i_size > old_size)
1251                         mark_inode_dirty(inode);
1252                 unlock_kernel();
1253         }
1254
1255         lock_24kernel();
1256         journal_stop(handle);
1257         unlock_24kernel();
1258
1259         if (err == 0)
1260                 *offs = offset;
1261         return err;
1262 }
1263
1264 static int fsfilt_ext3_setup(struct super_block *sb)
1265 {
1266 #if 0
1267         EXT3_SB(sb)->dx_lock = fsfilt_ext3_dx_lock;
1268         EXT3_SB(sb)->dx_unlock = fsfilt_ext3_dx_unlock;
1269 #endif
1270 #ifdef S_PDIROPS
1271         CWARN("Enabling PDIROPS\n");
1272         set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
1273         sb->s_flags |= S_PDIROPS;
1274 #endif
1275         if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1276                 CWARN("filesystem doesn't have dir_index feature enabled\n");
1277         return 0;
1278 }
1279
1280 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1281    objects. Logs is number of logfiles to update */
1282 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1283 {
1284         if ( !fso ) {
1285                 switch(op) {
1286                 case FSFILT_OP_CREATE:
1287                                  /* directory leaf, index & indirect & EA*/
1288                         return 4 + 3 * logs;
1289                 case FSFILT_OP_UNLINK:
1290                         return 3 * logs;
1291                 }
1292         } else {
1293                 int i;
1294                 int needed = 0;
1295                 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1296                 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1297                 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1298                 for (i = 0; i < op; i++, fso++) {
1299                         int nblocks = fso->fso_bufcnt * blockpp;
1300                         int ndindirect = min(nblocks, addrpp + 1);
1301                         int nindir = nblocks + ndindirect + 1;
1302
1303                         needed += nindir;
1304                 }
1305                 return needed + 3 * logs;
1306         }
1307
1308         return 0;
1309 }
1310
1311 static const char *op_quotafile[] = { "lquota.user", "lquota.group" };
1312
1313 #define DQINFO_COPY(out, in)                    \
1314 do {                                            \
1315         Q_COPY(out, in, dqi_bgrace);            \
1316         Q_COPY(out, in, dqi_igrace);            \
1317         Q_COPY(out, in, dqi_flags);             \
1318         Q_COPY(out, in, dqi_valid);             \
1319 } while (0)
1320
1321 #define DQBLK_COPY(out, in)                     \
1322 do {                                            \
1323         Q_COPY(out, in, dqb_bhardlimit);        \
1324         Q_COPY(out, in, dqb_bsoftlimit);        \
1325         Q_COPY(out, in, dqb_curspace);          \
1326         Q_COPY(out, in, dqb_ihardlimit);        \
1327         Q_COPY(out, in, dqb_isoftlimit);        \
1328         Q_COPY(out, in, dqb_curinodes);         \
1329         Q_COPY(out, in, dqb_btime);             \
1330         Q_COPY(out, in, dqb_itime);             \
1331         Q_COPY(out, in, dqb_valid);             \
1332 } while (0)
1333
1334
1335
1336 static int fsfilt_ext3_quotactl(struct super_block *sb,
1337                                 struct obd_quotactl *oqc)
1338 {
1339         int i, rc = 0, error = 0;
1340         struct quotactl_ops *qcop;
1341         struct if_dqinfo *info;
1342         struct if_dqblk *dqblk;
1343         ENTRY;
1344
1345         if (!sb->s_qcop)
1346                 RETURN(-ENOSYS);
1347
1348         OBD_ALLOC_PTR(info);
1349         if (!info)
1350                 RETURN(-ENOMEM);
1351         OBD_ALLOC_PTR(dqblk);
1352         if (!dqblk) {
1353                 OBD_FREE_PTR(info);
1354                 RETURN(-ENOMEM);
1355         }
1356
1357         DQINFO_COPY(info, &oqc->qc_dqinfo);
1358         DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1359
1360         qcop = sb->s_qcop;
1361         if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1362                 for (i = 0; i < MAXQUOTAS; i++) {
1363                         if (!Q_TYPESET(oqc, i))
1364                                 continue;
1365
1366                         if (oqc->qc_cmd == Q_QUOTAON) {
1367                                 if (!qcop->quota_on)
1368                                         GOTO(out, rc = -ENOSYS);
1369                                 rc = qcop->quota_on(sb, i, oqc->qc_id,
1370                                                     (char *)op_quotafile[i]);
1371                         } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1372                                 if (!qcop->quota_off)
1373                                         GOTO(out, rc = -ENOSYS);
1374                                 rc = qcop->quota_off(sb, i);
1375                         }
1376
1377                         if (rc == -EBUSY)
1378                                 error = rc;
1379                         else if (rc)
1380                                 GOTO(out, rc);
1381                 }
1382                 GOTO(out, rc ?: error);
1383         }
1384
1385         switch (oqc->qc_cmd) {
1386         case Q_GETOINFO:
1387         case Q_GETINFO:
1388                 if (!qcop->get_info)
1389                         GOTO(out, rc = -ENOSYS);
1390                 rc = qcop->get_info(sb, oqc->qc_type, info);
1391                 break;
1392         case Q_SETQUOTA:
1393         case Q_INITQUOTA:
1394                 if (!qcop->set_dqblk)
1395                         GOTO(out, rc = -ENOSYS);
1396                 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1397                 break;
1398         case Q_GETOQUOTA:
1399         case Q_GETQUOTA:
1400                 if (!qcop->get_dqblk)
1401                         GOTO(out, rc = -ENOSYS);
1402                 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1403                 break;
1404         case Q_SYNC:
1405                 if (!sb->s_qcop->quota_sync)
1406                         GOTO(out, rc = -ENOSYS);
1407                 qcop->quota_sync(sb, oqc->qc_type);
1408                 break;
1409         default:
1410                 CERROR("unsupported quotactl command: %d", oqc->qc_cmd);
1411                 LBUG();
1412         }
1413 out:
1414         DQINFO_COPY(&oqc->qc_dqinfo, info);
1415         DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1416
1417         OBD_FREE_PTR(info);
1418         OBD_FREE_PTR(dqblk);
1419
1420         if (rc)
1421                 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %d "
1422                                 "failed: %d\n",
1423                        oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1424         RETURN(rc);
1425 }
1426
1427 struct chk_dqblk{
1428         struct hlist_node       dqb_hash;        /* quotacheck hash */
1429         struct list_head        dqb_list;        /* in list also */
1430         qid_t                   dqb_id;          /* uid/gid */
1431         short                   dqb_type;        /* USRQUOTA/GRPQUOTA */
1432         __u32                   dqb_bhardlimit;  /* block hard limit */
1433         __u32                   dqb_bsoftlimit;  /* block soft limit */
1434         qsize_t                 dqb_curspace;    /* current space */
1435         __u32                   dqb_ihardlimit;  /* inode hard limit */
1436         __u32                   dqb_isoftlimit;  /* inode soft limit */
1437         __u32                   dqb_curinodes;   /* current inodes */
1438         __u64                   dqb_btime;       /* block grace time */
1439         __u64                   dqb_itime;       /* inode grace time */
1440         __u32                   dqb_valid;       /* flag for above fields */
1441 };
1442
1443 static inline unsigned int chkquot_hash(qid_t id, int type)
1444                                         __attribute__((__const__));
1445
1446 static inline unsigned int chkquot_hash(qid_t id, int type)
1447 {
1448         return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1449 }
1450
1451 static inline struct chk_dqblk *
1452 find_chkquot(struct hlist_head *head, qid_t id, int type)
1453 {
1454         struct hlist_node *node;
1455         struct chk_dqblk *cdqb;
1456
1457         hlist_for_each(node, head) {
1458                 cdqb = hlist_entry(node, struct chk_dqblk, dqb_hash);
1459                 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1460                         return cdqb;
1461         }
1462
1463         return NULL;
1464 }
1465
1466 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1467 {
1468         struct chk_dqblk *cdqb;
1469
1470         OBD_ALLOC_PTR(cdqb);
1471         if (cdqb) {
1472                 INIT_HLIST_NODE(&cdqb->dqb_hash);
1473                 INIT_LIST_HEAD(&cdqb->dqb_list);
1474                 cdqb->dqb_id = id;
1475                 cdqb->dqb_type = type;
1476         }
1477
1478         return cdqb;
1479 }
1480
1481 static struct chk_dqblk *
1482 cqget(struct super_block *sb, struct hlist_head *hash, struct list_head *list,
1483       qid_t id, int type, int first_check)
1484 {
1485         struct hlist_head *head = hash + chkquot_hash(id, type);
1486         struct if_dqblk dqb;
1487         struct chk_dqblk *cdqb;
1488         int rc;
1489
1490         cdqb = find_chkquot(head, id, type);
1491         if (cdqb)
1492                 return cdqb;
1493
1494         cdqb = alloc_chkquot(id, type);
1495         if (!cdqb)
1496                 return NULL;
1497
1498         if (!first_check) {
1499                 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1500                 if (rc) {
1501                         CERROR("get_dqblk of id %u, type %d failed: %d\n",
1502                                id, type, rc);
1503                 } else {
1504                         DQBLK_COPY(cdqb, &dqb);
1505                         cdqb->dqb_curspace = 0;
1506                         cdqb->dqb_curinodes = 0;
1507                 }
1508         }
1509
1510         hlist_add_head(&cdqb->dqb_hash, head);
1511         list_add_tail(&cdqb->dqb_list, list);
1512
1513         return cdqb;
1514 }
1515
1516 static inline int quota_onoff(struct super_block *sb, int cmd, int type)
1517 {
1518         struct obd_quotactl *oqctl;
1519         int rc;
1520
1521         OBD_ALLOC_PTR(oqctl);
1522         if (!oqctl)
1523                 RETURN(-ENOMEM);
1524
1525         oqctl->qc_cmd = cmd;
1526         oqctl->qc_id = QFMT_LDISKFS;
1527         oqctl->qc_type = type;
1528         rc = fsfilt_ext3_quotactl(sb, oqctl);
1529
1530         OBD_FREE_PTR(oqctl);
1531         return rc;
1532 }
1533
1534 static inline int read_old_dqinfo(struct super_block *sb, int type,
1535                                   struct if_dqinfo *dqinfo)
1536 {
1537         struct obd_quotactl *oqctl;
1538         int rc;
1539         ENTRY;
1540
1541         OBD_ALLOC_PTR(oqctl);
1542         if (!oqctl)
1543                 RETURN(-ENOMEM);
1544
1545         oqctl->qc_cmd = Q_GETINFO;
1546         oqctl->qc_type = type;
1547         rc = fsfilt_ext3_quotactl(sb, oqctl);
1548         if (!rc)
1549                 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1550
1551         OBD_FREE_PTR(oqctl);
1552         RETURN(rc);
1553 }
1554
1555 static inline struct ext3_group_desc *
1556 get_group_desc(struct super_block *sb, int group)
1557 {
1558         unsigned long desc_block, desc;
1559         struct ext3_group_desc *gdp;
1560
1561         desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1562         desc = group % EXT3_DESC_PER_BLOCK(sb);
1563         gdp = (struct ext3_group_desc *)
1564               EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1565
1566         return gdp + desc;
1567 }
1568
1569 static inline struct buffer_head *
1570 read_inode_bitmap(struct super_block *sb, unsigned long group)
1571 {
1572         struct ext3_group_desc *desc;
1573         struct buffer_head *bh;
1574
1575         desc = get_group_desc(sb, group);
1576         bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
1577
1578         return bh;
1579 }
1580
1581 static inline struct inode *ext3_iget_inuse(struct super_block *sb,
1582                                      struct buffer_head *bitmap_bh,
1583                                      int index, unsigned long ino)
1584 {
1585         struct inode *inode = NULL;
1586
1587         if (ext3_test_bit(index, bitmap_bh->b_data))
1588                 inode = iget(sb, ino);
1589
1590         return inode;
1591 }
1592
1593 struct qchk_ctxt {
1594         struct hlist_head       qckt_hash[NR_DQHASH];        /* quotacheck hash */
1595         struct list_head        qckt_list;                   /* quotacheck list */
1596         int                     qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1597         struct if_dqinfo        qckt_dqinfo[MAXQUOTAS];      /* old dqinfo */
1598 };
1599
1600 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1601                            struct obd_quotactl *oqc)
1602 {
1603         struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1604         loff_t size = 0;
1605         qid_t qid[MAXQUOTAS];
1606         int cnt, i, rc = 0;
1607
1608         if (!inode)
1609                 return 0;
1610
1611         qid[USRQUOTA] = inode->i_uid;
1612         qid[GRPQUOTA] = inode->i_gid;
1613
1614         if (S_ISDIR(inode->i_mode) ||
1615             S_ISREG(inode->i_mode) ||
1616             S_ISLNK(inode->i_mode))
1617                 size = inode_get_bytes(inode);
1618
1619         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1620                 if (!Q_TYPESET(oqc, cnt))
1621                         continue;
1622
1623                 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1624                                 &qctxt->qckt_list, qid[cnt], cnt,
1625                                 qctxt->qckt_first_check[cnt]);
1626                 if (!cdqb[cnt]) {
1627                         rc = -ENOMEM;
1628                         break;
1629                 }
1630
1631                 cdqb[cnt]->dqb_curspace += size;
1632                 cdqb[cnt]->dqb_curinodes++;
1633         }
1634
1635         if (rc) {
1636                 for (i = 0; i < cnt; i++) {
1637                         if (!Q_TYPESET(oqc, i))
1638                                 continue;
1639                         LASSERT(cdqb[i]);
1640                         cdqb[i]->dqb_curspace -= size;
1641                         cdqb[i]->dqb_curinodes--;
1642                 }
1643         }
1644
1645         return rc;
1646 }
1647
1648 static int v2_write_dqheader(struct file *f, int type)
1649 {
1650         static const __u32 quota_magics[] = V2_INITQMAGICS;
1651         static const __u32 quota_versions[] = V2_INITQVERSIONS;
1652         struct v2_disk_dqheader dqhead;
1653         loff_t offset = 0;
1654
1655         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1656         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1657
1658         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1659         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1660
1661         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1662 }
1663
1664 /* write dqinfo struct in a new quota file */
1665 static int v2_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1666 {
1667         struct v2_disk_dqinfo dqinfo;
1668         __u32 blocks = V2_DQTREEOFF + 1;
1669         loff_t offset = V2_DQINFOOFF;
1670
1671         if (info) {
1672                 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1673                 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1674                 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1675                                                ~DQF_INFO_DIRTY);
1676         } else {
1677                 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1678                 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1679                 dqinfo.dqi_flags = 0;
1680         }
1681
1682         dqinfo.dqi_blocks = cpu_to_le32(blocks);
1683         dqinfo.dqi_free_blk = 0;
1684         dqinfo.dqi_free_entry = 0;
1685
1686         return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1687 }
1688
1689 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1690                                   struct obd_quotactl *oqc)
1691 {
1692         int i, rc = 0;
1693         ENTRY;
1694
1695         for (i = 0; i < MAXQUOTAS; i++) {
1696                 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1697                                          NULL : &qctxt->qckt_dqinfo[i];
1698                 struct file *file;
1699
1700                 if (!Q_TYPESET(oqc, i))
1701                         continue;
1702
1703                 file = filp_open(op_quotafile[i], O_RDWR | O_CREAT | O_TRUNC,
1704                                  0644);
1705                 if (IS_ERR(file)) {
1706                         rc = PTR_ERR(file);
1707                         CERROR("can't create %s file: rc = %d\n",
1708                                op_quotafile[i], rc);
1709                         GOTO(out, rc);
1710                 }
1711
1712                 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1713                         CERROR("file %s is not regular", op_quotafile[i]);
1714                         filp_close(file, 0);
1715                         GOTO(out, rc = -EINVAL);
1716                 }
1717
1718                 rc = v2_write_dqheader(file, i);
1719                 if (rc) {
1720                         filp_close(file, 0);
1721                         GOTO(out, rc);
1722                 }
1723
1724                 rc = v2_write_dqinfo(file, i, info);
1725                 filp_close(file, 0);
1726                 if (rc)
1727                         GOTO(out, rc);
1728         }
1729
1730 out:
1731         RETURN(rc);
1732 }
1733
1734
1735 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1736                           struct chk_dqblk *cdqb)
1737 {
1738         struct obd_quotactl *oqc;
1739         long now;
1740         int rc;
1741         ENTRY;
1742
1743         OBD_ALLOC_PTR(oqc);
1744         if (!oqc)
1745                 RETURN(-ENOMEM);
1746
1747         now = CURRENT_SECONDS;
1748
1749         if (cdqb->dqb_bsoftlimit &&
1750             toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1751             !cdqb->dqb_btime)
1752                 cdqb->dqb_btime =
1753                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1754
1755         if (cdqb->dqb_isoftlimit &&
1756             cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1757             !cdqb->dqb_itime)
1758                 cdqb->dqb_itime =
1759                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1760
1761         cdqb->dqb_valid = QIF_ALL;
1762
1763         oqc->qc_cmd = Q_SETQUOTA;
1764         oqc->qc_type = cdqb->dqb_type;
1765         oqc->qc_id = cdqb->dqb_id;
1766         DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1767
1768         rc = fsfilt_ext3_quotactl(sb, oqc);
1769         OBD_FREE_PTR(oqc);
1770         RETURN(rc);
1771 }
1772
1773 static int prune_chkquots(struct super_block *sb,
1774                           struct qchk_ctxt *qctxt, int error)
1775 {
1776         struct chk_dqblk *cdqb, *tmp;
1777         int rc;
1778
1779         list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1780                 if (!error) {
1781                         rc = commit_chkquot(sb, qctxt, cdqb);
1782                         if (rc)
1783                                 error = rc;
1784                 }
1785                 hlist_del_init(&cdqb->dqb_hash);
1786                 list_del(&cdqb->dqb_list);
1787                 OBD_FREE_PTR(cdqb);
1788         }
1789
1790         return error;
1791 }
1792
1793 static int fsfilt_ext3_quotacheck(struct super_block *sb,
1794                                   struct obd_quotactl *oqc)
1795 {
1796         struct ext3_sb_info *sbi = EXT3_SB(sb);
1797         int i, group;
1798         struct qchk_ctxt *qctxt;
1799         struct buffer_head *bitmap_bh = NULL;
1800         unsigned long ino;
1801         struct inode *inode;
1802         int rc = 0;
1803         ENTRY;
1804
1805         /* turn on quota and read dqinfo if existed */
1806         OBD_ALLOC_PTR(qctxt);
1807         if (!qctxt) {
1808                 oqc->qc_stat = -ENOMEM;
1809                 RETURN(-ENOMEM);
1810         }
1811
1812         for (i = 0; i < NR_DQHASH; i++)
1813                 INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
1814         INIT_LIST_HEAD(&qctxt->qckt_list);
1815
1816         for (i = 0; i < MAXQUOTAS; i++) {
1817                 if (!Q_TYPESET(oqc, i))
1818                         continue;
1819
1820                 rc = quota_onoff(sb, Q_QUOTAON, i);
1821                 if (!rc || rc == -EBUSY) {
1822                         rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
1823                         if (rc)
1824                                 GOTO(out, rc);
1825                 } else if (rc == -ENOENT) {
1826                         qctxt->qckt_first_check[i] = 1;
1827                 } else if (rc) {
1828                         GOTO(out, rc);
1829                 }
1830         }
1831
1832         /* check quota and update in hash */
1833         for (group = 0; group < sbi->s_groups_count; group++) {
1834                 ino = group * sbi->s_inodes_per_group + 1;
1835                 bitmap_bh = read_inode_bitmap(sb, group);
1836                 if (!bitmap_bh) {
1837                         CERROR("read_inode_bitmap group %d failed", group);
1838                         GOTO(out, -EIO);
1839                 }
1840
1841                 for (i = 0; i < sbi->s_inodes_per_group; i++, ino++) {
1842                         if (ino < sbi->s_first_ino)
1843                                 continue;
1844
1845                         inode = ext3_iget_inuse(sb, bitmap_bh, i, ino);
1846                         rc = add_inode_quota(inode, qctxt, oqc);
1847                         iput(inode);
1848                         if (rc) {
1849                                 brelse(bitmap_bh);
1850                                 GOTO(out, rc);
1851                         }
1852                 }
1853
1854                 brelse(bitmap_bh);
1855         }
1856
1857         /* read old quota limits from old quota file. (only for the user
1858          * has limits but hasn't file) */
1859 #ifdef HAVE_QUOTA_SUPPORT
1860         for (i = 0; i < MAXQUOTAS; i++) {
1861                 struct list_head id_list;
1862                 struct dquot_id *dqid, *tmp;
1863
1864                 if (!Q_TYPESET(oqc, i))
1865                         continue;
1866
1867                 if (qctxt->qckt_first_check[i])
1868                         continue;
1869
1870
1871                 LASSERT(sb_dqopt(sb)->files[i] != NULL);
1872                 INIT_LIST_HEAD(&id_list);
1873 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1874                 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
1875 #else
1876                 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
1877 #endif
1878                 if (rc)
1879                         CERROR("read old limits failed. (rc:%d)\n", rc);
1880
1881                 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1882                         list_del_init(&dqid->di_link);
1883
1884                         if (!rc)
1885                                 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
1886                                       dqid->di_id, i,
1887                                       qctxt->qckt_first_check[i]);
1888                         kfree(dqid);
1889                 }
1890         }
1891 #endif
1892         /* turn off quota cause we are to dump chk_dqblk to files */
1893         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1894
1895         rc = create_new_quota_files(qctxt, oqc);
1896         if (rc)
1897                 GOTO(out, rc);
1898
1899         /* we use vfs functions to set dqblk, so turn quota on */
1900         rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type);
1901 out:
1902         /* dump and free chk_dqblk */
1903         rc = prune_chkquots(sb, qctxt, rc);
1904         OBD_FREE_PTR(qctxt);
1905
1906         /* turn off quota, `lfs quotacheck` will turn on when all
1907          * nodes quotacheck finish. */
1908         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1909
1910         oqc->qc_stat = rc;
1911         if (rc)
1912                 CERROR("quotacheck failed: rc = %d\n", rc);
1913
1914         RETURN(rc);
1915 }
1916
1917 #ifdef HAVE_QUOTA_SUPPORT
1918 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
1919                                  int cmd)
1920 {
1921         int rc = 0;
1922         ENTRY;
1923
1924         if (lqi->qi_files[type] == NULL) {
1925                 CERROR("operate qinfo before it's enabled!\n");
1926                 RETURN(-EIO);
1927         }
1928
1929         switch (cmd) {
1930         case QFILE_CHK:
1931                 rc = lustre_check_quota_file(lqi, type);
1932                 break;
1933         case QFILE_RD_INFO:
1934                 rc = lustre_read_quota_info(lqi, type);
1935                 break;
1936         case QFILE_WR_INFO:
1937                 rc = lustre_write_quota_info(lqi, type);
1938                 break;
1939         case QFILE_INIT_INFO:
1940                 rc = lustre_init_quota_info(lqi, type);
1941                 break;
1942         default:
1943                 CERROR("Unsupported admin quota file cmd %d\n", cmd);
1944                 LBUG();
1945                 break;
1946         }
1947         RETURN(rc);
1948 }
1949
1950 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
1951                             struct list_head *list)
1952 {
1953         return lustre_get_qids(file, inode, type, list);
1954 }
1955
1956 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
1957 {
1958         int rc = 0;
1959         ENTRY;
1960
1961         if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
1962                 CERROR("operate dquot before it's enabled!\n");
1963                 RETURN(-EIO);
1964         }
1965
1966         switch (cmd) {
1967         case QFILE_RD_DQUOT:
1968                 rc = lustre_read_dquot(dquot);
1969                 break;
1970         case QFILE_WR_DQUOT:
1971                 if (dquot->dq_dqb.dqb_ihardlimit ||
1972                     dquot->dq_dqb.dqb_isoftlimit ||
1973                     dquot->dq_dqb.dqb_bhardlimit ||
1974                     dquot->dq_dqb.dqb_bsoftlimit)
1975                         clear_bit(DQ_FAKE_B, &dquot->dq_flags);
1976                 else
1977                         set_bit(DQ_FAKE_B, &dquot->dq_flags);
1978
1979                 rc = lustre_commit_dquot(dquot);
1980                 if (rc >= 0)
1981                         rc = 0;
1982                 break;
1983         default:
1984                 CERROR("Unsupported admin quota file cmd %d\n", cmd);
1985                 LBUG();
1986                 break;
1987         }
1988         RETURN(rc);
1989 }
1990 #endif
1991
1992 static lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
1993 {
1994 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
1995         return (EXT3_SB(sb)->journal_bdev);
1996 #else
1997         return kdev_t_to_nr(EXT3_SB(sb)->s_journal->j_dev);
1998 #endif
1999 }
2000
2001 static struct fsfilt_operations fsfilt_ext3_ops = {
2002         .fs_type                = "ext3",
2003         .fs_owner               = THIS_MODULE,
2004         .fs_getlabel            = fsfilt_ext3_get_label,
2005         .fs_setlabel            = fsfilt_ext3_set_label,
2006         .fs_uuid                = fsfilt_ext3_uuid,
2007         .fs_start               = fsfilt_ext3_start,
2008         .fs_brw_start           = fsfilt_ext3_brw_start,
2009         .fs_extend              = fsfilt_ext3_extend,
2010         .fs_commit              = fsfilt_ext3_commit,
2011         .fs_commit_async        = fsfilt_ext3_commit_async,
2012         .fs_commit_wait         = fsfilt_ext3_commit_wait,
2013         .fs_setattr             = fsfilt_ext3_setattr,
2014         .fs_iocontrol           = fsfilt_ext3_iocontrol,
2015         .fs_set_md              = fsfilt_ext3_set_md,
2016         .fs_get_md              = fsfilt_ext3_get_md,
2017         .fs_readpage            = fsfilt_ext3_readpage,
2018         .fs_add_journal_cb      = fsfilt_ext3_add_journal_cb,
2019         .fs_statfs              = fsfilt_ext3_statfs,
2020         .fs_sync                = fsfilt_ext3_sync,
2021         .fs_map_inode_pages     = fsfilt_ext3_map_inode_pages,
2022         .fs_prep_san_write      = fsfilt_ext3_prep_san_write,
2023         .fs_write_record        = fsfilt_ext3_write_record,
2024         .fs_read_record         = fsfilt_ext3_read_record,
2025         .fs_setup               = fsfilt_ext3_setup,
2026         .fs_send_bio            = fsfilt_ext3_send_bio,
2027         .fs_get_op_len          = fsfilt_ext3_get_op_len,
2028         .fs_quotactl            = fsfilt_ext3_quotactl,
2029         .fs_quotacheck          = fsfilt_ext3_quotacheck,
2030 #ifdef HAVE_QUOTA_SUPPORT
2031         .fs_quotainfo           = fsfilt_ext3_quotainfo,
2032         .fs_qids                = fsfilt_ext3_qids,
2033         .fs_dquot               = fsfilt_ext3_dquot,
2034 #endif
2035         .fs_journal_sbdev       = fsfilt_ext3_journal_sbdev,
2036 };
2037
2038 static int __init fsfilt_ext3_init(void)
2039 {
2040         int rc;
2041
2042         fcb_cache = kmem_cache_create("fsfilt_ext3_fcb",
2043                                       sizeof(struct fsfilt_cb_data), 0,
2044                                       0, NULL, NULL);
2045         if (!fcb_cache) {
2046                 CERROR("error allocating fsfilt journal callback cache\n");
2047                 GOTO(out, rc = -ENOMEM);
2048         }
2049
2050         rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2051
2052         if (rc) {
2053                 int err = kmem_cache_destroy(fcb_cache);
2054                 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2055         }
2056 out:
2057         return rc;
2058 }
2059
2060 static void __exit fsfilt_ext3_exit(void)
2061 {
2062         int rc;
2063
2064         fsfilt_unregister_ops(&fsfilt_ext3_ops);
2065         rc = kmem_cache_destroy(fcb_cache);
2066         LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2067 }
2068
2069 module_init(fsfilt_ext3_init);
2070 module_exit(fsfilt_ext3_exit);
2071
2072 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2073 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2074 MODULE_LICENSE("GPL");