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 #include <linux/parser.h>
  43 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  44 #include <linux/ext3_xattr.h>
  45 #else
  46 #include <ext3/xattr.h>
  47 #endif
  48
  49 #include <libcfs/kp30.h>
  50 #include <lustre_fsfilt.h>
  51 #include <obd.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 #include "lustre_quota_fmt.h"
  64
  65 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
  66 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS
  67 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS
  68 #else
  69 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS(sb)
  70 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS(sb)
  71 #endif
  72
  73 #ifdef EXT3_SINGLEDATA_TRANS_BLOCKS_HAS_SB
  74 /* for kernels 2.6.18 and later */
  75 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
  76 #else
  77 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS
  78 #endif
  79
  80 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  81 #define fsfilt_ext3_journal_start(inode, nblocks) \
  82                                 journal_start(EXT3_JOURNAL(inode),nblocks)
  83 #define fsfilt_ext3_journal_stop(handle)          journal_stop(handle)
  84 #else
  85 #define fsfilt_ext3_journal_start(inode, nblocks) ext3_journal_start(inode, nblocks)
  86 #define fsfilt_ext3_journal_stop(handle)          ext3_journal_stop(handle)
  87 #endif
  88
  89 static cfs_mem_cache_t *fcb_cache;
  90
  91 struct fsfilt_cb_data {
  92         struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
  93         fsfilt_cb_t cb_func;            /* MDS/OBD completion function */
  94         struct obd_device *cb_obd;      /* MDS/OBD completion device */
  95         __u64 cb_last_rcvd;             /* MDS/OST last committed operation */
  96         void *cb_data;                  /* MDS/OST completion function data */
  97 };
  98
  99 #ifndef EXT3_XATTR_INDEX_TRUSTED        /* temporary until we hit l28 kernel */
 100 #define EXT3_XATTR_INDEX_TRUSTED        4
 101 #endif
 102
 103 static char *fsfilt_ext3_get_label(struct super_block *sb)
 104 {
 105         return EXT3_SB(sb)->s_es->s_volume_name;
 106 }
 107
 108 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
 109 {
 110         /* see e.g. fsfilt_ext3_write_record() */
 111         journal_t *journal;
 112         handle_t *handle;
 113         int err;
 114
 115         journal = EXT3_SB(sb)->s_journal;
 116         lock_24kernel();
 117         handle = journal_start(journal, 1);
 118         unlock_24kernel();
 119         if (IS_ERR(handle)) {
 120                 CERROR("can't start transaction\n");
 121                 return(PTR_ERR(handle));
 122         }
 123
 124         err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
 125         if (err)
 126                 goto out;
 127
 128         memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
 129                sizeof(EXT3_SB(sb)->s_es->s_volume_name));
 130
 131         err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
 132
 133 out:
 134         lock_24kernel();
 135         journal_stop(handle);
 136         unlock_24kernel();
 137
 138         return(err);
 139 }
 140
 141 static char *fsfilt_ext3_uuid(struct super_block *sb)
 142 {
 143         return EXT3_SB(sb)->s_es->s_uuid;
 144 }
 145
 146 #ifdef HAVE_DISK_INODE_VERSION
 147 /*
 148  * Get the 64-bit version for an inode.
 149  */
 150 static __u64 fsfilt_ext3_get_version(struct inode *inode)
 151 {
 152         return EXT3_I(inode)->i_fs_version;
 153 }
 154
 155 /*
 156  * Set the 64-bit version and return the old version.
 157  */
 158 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
 159 {
 160         __u64 old_version = EXT3_I(inode)->i_fs_version;
 161
 162         (EXT3_I(inode))->i_fs_version = new_version;
 163         return old_version;
 164 }
 165
 166 #endif
 167
 168 /*
 169  * We don't currently need any additional blocks for rmdir and
 170  * unlink transactions because we are storing the OST oa_id inside
 171  * the inode (which we will be changing anyways as part of this
 172  * transaction).
 173  */
 174 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
 175                                int logs)
 176 {
 177         /* For updates to the last received file */
 178         int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
 179         journal_t *journal;
 180         void *handle;
 181
 182         if (current->journal_info) {
 183                 CDEBUG(D_INODE, "increasing refcount on %p\n",
 184                        current->journal_info);
 185                 goto journal_start;
 186         }
 187
 188         switch(op) {
 189         case FSFILT_OP_RMDIR:
 190         case FSFILT_OP_UNLINK:
 191                 /* delete one file + create/update logs for each stripe */
 192                 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 193                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 194                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 195                 break;
 196         case FSFILT_OP_RENAME:
 197                 /* modify additional directory */
 198                 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
 199                 /* no break */
 200         case FSFILT_OP_SYMLINK:
 201                 /* additional block + block bitmap + GDT for long symlink */
 202                 nblocks += 3;
 203                 /* no break */
 204         case FSFILT_OP_CREATE: {
 205 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL)
 206                 static int warned;
 207                 if (!warned) {
 208                         if (!test_opt(inode->i_sb, EXTENTS)) {
 209                                 warned = 1;
 210                         } else if (((EXT3_I(inode)->i_flags &
 211                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
 212                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
 213                                 CWARN("extent-mapped directory found - contact "
 214                                       "CFS: support@clusterfs.com\n");
 215                                 warned = 1;
 216                         }
 217                 }
 218 #endif
 219                 /* no break */
 220         }
 221         case FSFILT_OP_MKDIR:
 222         case FSFILT_OP_MKNOD:
 223                 /* modify one inode + block bitmap + GDT */
 224                 nblocks += 3;
 225                 /* no break */
 226         case FSFILT_OP_LINK:
 227                 /* modify parent directory */
 228                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 229                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 230                 /* create/update logs for each stripe */
 231                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 232                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 233                 break;
 234         case FSFILT_OP_SETATTR:
 235                 /* Setattr on inode */
 236                 nblocks += 1;
 237                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 238                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 239                 /* quota chown log for each stripe */
 240                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 241                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 242                 break;
 243         case FSFILT_OP_CANCEL_UNLINK:
 244                 /* blocks for log header bitmap update OR
 245                  * blocks for catalog header bitmap update + unlink of logs */
 246                 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
 247                         FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
 248                 break;
 249         case FSFILT_OP_JOIN:
 250                 /* delete 2 file(file + array id) + create 1 file (array id)
 251                  * create/update logs for each stripe */
 252                 nblocks += 2 * FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 253
 254                 /*create array log for head file*/
 255                 nblocks += 3;
 256                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 257                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb));
 258                 /*update head file array */
 259                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 260                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 261                 break;
 262         default: CERROR("unknown transaction start op %d\n", op);
 263                 LBUG();
 264         }
 265
 266         LASSERT(current->journal_info == desc_private);
 267         journal = EXT3_SB(inode->i_sb)->s_journal;
 268         if (nblocks > journal->j_max_transaction_buffers) {
 269                 CWARN("too many credits %d for op %ux%u using %d instead\n",
 270                       nblocks, op, logs, journal->j_max_transaction_buffers);
 271                 nblocks = journal->j_max_transaction_buffers;
 272         }
 273
 274  journal_start:
 275         LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
 276         lock_24kernel();
 277         handle = fsfilt_ext3_journal_start(inode, nblocks);
 278         unlock_24kernel();
 279
 280         if (!IS_ERR(handle))
 281                 LASSERT(current->journal_info == handle);
 282         else
 283                 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
 284                        op, nblocks, PTR_ERR(handle));
 285         return handle;
 286 }
 287
 288 /*
 289  * Calculate the number of buffer credits needed to write multiple pages in
 290  * a single ext3 transaction.  No, this shouldn't be here, but as yet ext3
 291  * doesn't have a nice API for calculating this sort of thing in advance.
 292  *
 293  * See comment above ext3_writepage_trans_blocks for details.  We assume
 294  * no data journaling is being done, but it does allow for all of the pages
 295  * being non-contiguous.  If we are guaranteed contiguous pages we could
 296  * reduce the number of (d)indirect blocks a lot.
 297  *
 298  * With N blocks per page and P pages, for each inode we have at most:
 299  * N*P indirect
 300  * min(N*P, blocksize/4 + 1) dindirect blocks
 301  * niocount tindirect
 302  *
 303  * For the entire filesystem, we have at most:
 304  * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
 305  * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
 306  * objcount inode blocks
 307  * 1 superblock
 308  * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
 309  *
 310  * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
 311  */
 312 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
 313                                       int niocount, struct niobuf_local *nb)
 314 {
 315         struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
 316         __u64 next_indir;
 317         const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
 318         int nbitmaps = 0, ngdblocks;
 319         int needed = objcount + 1; /* inodes + superblock */
 320         int i, j;
 321
 322         for (i = 0, j = 0; i < objcount; i++, fso++) {
 323                 /* two or more dindirect blocks in case we cross boundary */
 324                 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
 325                                     nb[j].offset) >>
 326                                    sb->s_blocksize_bits) /
 327                         (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
 328                 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
 329
 330                 /* leaf, indirect, tindirect blocks for first block */
 331                 nbitmaps += blockpp + 2;
 332
 333                 j += fso->fso_bufcnt;
 334         }
 335
 336         next_indir = nb[0].offset +
 337                 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
 338         for (i = 1; i < niocount; i++) {
 339                 if (nb[i].offset >= next_indir) {
 340                         nbitmaps++;     /* additional indirect */
 341                         next_indir = nb[i].offset +
 342                                 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
 343                 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
 344                         nbitmaps++;     /* additional indirect */
 345                 }
 346                 nbitmaps += blockpp;    /* each leaf in different group? */
 347         }
 348
 349         ngdblocks = nbitmaps;
 350         if (nbitmaps > EXT3_SB(sb)->s_groups_count)
 351                 nbitmaps = EXT3_SB(sb)->s_groups_count;
 352         if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
 353                 ngdblocks = EXT3_SB(sb)->s_gdb_count;
 354
 355         needed += nbitmaps + ngdblocks;
 356
 357         /* last_rcvd update */
 358         needed += FSFILT_DATA_TRANS_BLOCKS(sb);
 359
 360 #if defined(CONFIG_QUOTA)
 361         /* We assume that there will be 1 bit set in s_dquot.flags for each
 362          * quota file that is active.  This is at least true for now.
 363          */
 364         needed += hweight32(sb_any_quota_enabled(sb)) *
 365                 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
 366 #endif
 367
 368         return needed;
 369 }
 370
 371 /* We have to start a huge journal transaction here to hold all of the
 372  * metadata for the pages being written here.  This is necessitated by
 373  * the fact that we do lots of prepare_write operations before we do
 374  * any of the matching commit_write operations, so even if we split
 375  * up to use "smaller" transactions none of them could complete until
 376  * all of them were opened.  By having a single journal transaction,
 377  * we eliminate duplicate reservations for common blocks like the
 378  * superblock and group descriptors or bitmaps.
 379  *
 380  * We will start the transaction here, but each prepare_write will
 381  * add a refcount to the transaction, and each commit_write will
 382  * remove a refcount.  The transaction will be closed when all of
 383  * the pages have been written.
 384  */
 385 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
 386                                    int niocount, struct niobuf_local *nb,
 387                                    void *desc_private, int logs)
 388 {
 389         journal_t *journal;
 390         handle_t *handle;
 391         int needed;
 392         ENTRY;
 393
 394         LASSERT(current->journal_info == desc_private);
 395         journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
 396         needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
 397
 398         /* The number of blocks we could _possibly_ dirty can very large.
 399          * We reduce our request if it is absurd (and we couldn't get that
 400          * many credits for a single handle anyways).
 401          *
 402          * At some point we have to limit the size of I/Os sent at one time,
 403          * increase the size of the journal, or we have to calculate the
 404          * actual journal requirements more carefully by checking all of
 405          * the blocks instead of being maximally pessimistic.  It remains to
 406          * be seen if this is a real problem or not.
 407          */
 408         if (needed > journal->j_max_transaction_buffers) {
 409                 CERROR("want too many journal credits (%d) using %d instead\n",
 410                        needed, journal->j_max_transaction_buffers);
 411                 needed = journal->j_max_transaction_buffers;
 412         }
 413
 414         LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
 415         lock_24kernel();
 416         handle = fsfilt_ext3_journal_start(fso->fso_dentry->d_inode, needed);
 417         unlock_24kernel();
 418         if (IS_ERR(handle)) {
 419                 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
 420                        PTR_ERR(handle));
 421         } else {
 422                 LASSERT(handle->h_buffer_credits >= needed);
 423                 LASSERT(current->journal_info == handle);
 424         }
 425
 426         RETURN(handle);
 427 }
 428
 429 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
 430 {
 431        handle_t *handle = h;
 432
 433        /* fsfilt_extend called with nblocks = 0 for testing in special cases */
 434        if (nblocks == 0) {
 435                handle->h_buffer_credits = 0;
 436                CWARN("setting credits of handle %p to zero by request\n", h);
 437        }
 438
 439        if (handle->h_buffer_credits > nblocks)
 440                 return 0;
 441        if (journal_extend(handle, nblocks) == 0)
 442                 return 0;
 443
 444        ext3_mark_inode_dirty(handle, inode);
 445        return journal_restart(handle, nblocks);
 446 }
 447
 448 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
 449 {
 450         int rc;
 451         handle_t *handle = h;
 452
 453         LASSERT(current->journal_info == handle);
 454         if (force_sync)
 455                 handle->h_sync = 1; /* recovery likes this */
 456
 457         lock_24kernel();
 458         rc = fsfilt_ext3_journal_stop(handle);
 459         unlock_24kernel();
 460
 461         return rc;
 462 }
 463
 464 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
 465                                     void **wait_handle)
 466 {
 467         unsigned long tid;
 468         transaction_t *transaction;
 469 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 470         unsigned long rtid;
 471 #endif
 472         handle_t *handle = h;
 473         journal_t *journal;
 474         int rc;
 475
 476         LASSERT(current->journal_info == handle);
 477
 478         lock_24kernel();
 479         transaction = handle->h_transaction;
 480         journal = transaction->t_journal;
 481         tid = transaction->t_tid;
 482         /* we don't want to be blocked */
 483         handle->h_sync = 0;
 484         rc = fsfilt_ext3_journal_stop(handle);
 485         if (rc) {
 486                 CERROR("error while stopping transaction: %d\n", rc);
 487                 unlock_24kernel();
 488                 return rc;
 489         }
 490 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 491         rtid = log_start_commit(journal, transaction);
 492         if (rtid != tid)
 493                 CERROR("strange race: %lu != %lu\n",
 494                        (unsigned long) tid, (unsigned long) rtid);
 495 #else
 496         log_start_commit(journal, tid);
 497 #endif
 498         unlock_24kernel();
 499
 500         *wait_handle = (void *) tid;
 501         CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
 502         return 0;
 503 }
 504
 505 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
 506 {
 507         journal_t *journal = EXT3_JOURNAL(inode);
 508         tid_t tid = (tid_t)(long)h;
 509
 510         CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
 511         if (unlikely(is_journal_aborted(journal)))
 512                 return -EIO;
 513
 514         log_wait_commit(EXT3_JOURNAL(inode), tid);
 515
 516         if (unlikely(is_journal_aborted(journal)))
 517                 return -EIO;
 518         return 0;
 519 }
 520
 521 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
 522                                struct iattr *iattr, int do_trunc)
 523 {
 524         struct inode *inode = dentry->d_inode;
 525         int rc = 0;
 526
 527         lock_24kernel();
 528
 529         /* Avoid marking the inode dirty on the superblock list unnecessarily.
 530          * We are already writing the inode to disk as part of this
 531          * transaction and want to avoid a lot of extra inode writeout
 532          * later on. b=9828 */
 533         if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
 534                 /* ATTR_SIZE would invoke truncate: clear it */
 535                 iattr->ia_valid &= ~ATTR_SIZE;
 536                 EXT3_I(inode)->i_disksize = iattr->ia_size;
 537                 i_size_write(inode, iattr->ia_size);
 538
 539                 if (iattr->ia_valid & ATTR_UID)
 540                         inode->i_uid = iattr->ia_uid;
 541                 if (iattr->ia_valid & ATTR_GID)
 542                         inode->i_gid = iattr->ia_gid;
 543                 if (iattr->ia_valid & ATTR_ATIME)
 544                         inode->i_atime = iattr->ia_atime;
 545                 if (iattr->ia_valid & ATTR_MTIME)
 546                         inode->i_mtime = iattr->ia_mtime;
 547                 if (iattr->ia_valid & ATTR_CTIME)
 548                         inode->i_ctime = iattr->ia_ctime;
 549                 if (iattr->ia_valid & ATTR_MODE) {
 550                         inode->i_mode = iattr->ia_mode;
 551
 552                         if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 553                                 inode->i_mode &= ~S_ISGID;
 554                 }
 555
 556                 inode->i_sb->s_op->dirty_inode(inode);
 557
 558                 goto out;
 559         }
 560
 561         /* Don't allow setattr to change file type */
 562         if (iattr->ia_valid & ATTR_MODE)
 563                 iattr->ia_mode = (inode->i_mode & S_IFMT) |
 564                                  (iattr->ia_mode & ~S_IFMT);
 565
 566         /* We set these flags on the client, but have already checked perms
 567          * so don't confuse inode_change_ok. */
 568         iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
 569
 570         if (inode->i_op->setattr) {
 571                 rc = inode->i_op->setattr(dentry, iattr);
 572         } else {
 573                 rc = inode_change_ok(inode, iattr);
 574                 if (!rc)
 575                         rc = inode_setattr(inode, iattr);
 576         }
 577
 578  out:
 579         unlock_24kernel();
 580         RETURN(rc);
 581 }
 582
 583 static int fsfilt_ext3_iocontrol(struct inode * inode, struct file *file,
 584                                  unsigned int cmd, unsigned long arg)
 585 {
 586         int rc = 0;
 587         ENTRY;
 588
 589         /* FIXME: Can't do this because of nested transaction deadlock */
 590         if (cmd == EXT3_IOC_SETFLAGS && (*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
 591                 CERROR("can't set data journal flag on file\n");
 592                 RETURN(-EPERM);
 593         }
 594
 595         if (inode->i_fop->ioctl)
 596                 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
 597         else
 598                 RETURN(-ENOTTY);
 599
 600         RETURN(rc);
 601 }
 602
 603 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
 604                               void *lmm, int lmm_size, const char *name)
 605 {
 606         int rc;
 607
 608         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 609
 610         lock_24kernel();
 611         rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
 612                                    name, lmm, lmm_size, 0);
 613
 614         unlock_24kernel();
 615
 616         if (rc && rc != -EROFS)
 617                 CERROR("error adding MD data to inode %lu: rc = %d\n",
 618                        inode->i_ino, rc);
 619         return rc;
 620 }
 621
 622 /* Must be called with i_mutex held */
 623 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
 624                               const char *name)
 625 {
 626         int rc;
 627
 628         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 629         lock_24kernel();
 630
 631         rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
 632                             name, lmm, lmm_size);
 633         unlock_24kernel();
 634
 635         /* This gives us the MD size */
 636         if (lmm == NULL)
 637                 return (rc == -ENODATA) ? 0 : rc;
 638
 639         if (rc < 0) {
 640                 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
 641                        EXT3_XATTR_INDEX_TRUSTED, name,
 642                        inode->i_ino, rc);
 643                 memset(lmm, 0, lmm_size);
 644                 return (rc == -ENODATA) ? 0 : rc;
 645         }
 646
 647         return rc;
 648 }
 649
 650 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 651 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
 652 {
 653         submit_bio(rw, bio);
 654         return 0;
 655 }
 656 #else
 657 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct kiobuf *bio)
 658 {
 659         int rc, blk_per_page;
 660
 661         rc = brw_kiovec(rw, 1, &bio, inode->i_dev,
 662                         KIOBUF_GET_BLOCKS(bio), 1 << inode->i_blkbits);
 663         /*
 664          * brw_kiovec() returns number of bytes actually written. If error
 665          * occurred after something was written, error code is returned though
 666          * kiobuf->errno. (See bug 6854.)
 667          */
 668
 669         blk_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
 670
 671         if (rc != (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page) {
 672                 CERROR("short write?  expected %d, wrote %d (%d)\n",
 673                        (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page,
 674                        rc, bio->errno);
 675         }
 676         if (bio->errno != 0) {
 677                 CERROR("IO error. Wrote %d of %d (%d)\n",
 678                        rc,
 679                        (1 << inode->i_blkbits) * bio->nr_pages * blk_per_page,
 680                        bio->errno);
 681                 rc = bio->errno;
 682         }
 683
 684         return rc;
 685 }
 686 #endif
 687
 688 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
 689                                     loff_t *off)
 690 {
 691         struct inode *inode = file->f_dentry->d_inode;
 692         int rc = 0;
 693
 694         if (S_ISREG(inode->i_mode))
 695                 rc = file->f_op->read(file, buf, count, off);
 696         else {
 697                 const int blkbits = inode->i_sb->s_blocksize_bits;
 698                 const int blksize = inode->i_sb->s_blocksize;
 699
 700                 CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
 701                        count, inode->i_ino, *off);
 702                 while (count > 0) {
 703                         struct buffer_head *bh;
 704
 705                         bh = NULL;
 706                         if (*off < i_size_read(inode)) {
 707                                 int err = 0;
 708
 709                                 bh = ext3_bread(NULL, inode, *off >> blkbits,
 710                                                 0, &err);
 711
 712                                 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
 713
 714                                 if (bh) {
 715                                         memcpy(buf, bh->b_data, blksize);
 716                                         brelse(bh);
 717                                 } else if (err) {
 718                                         /* XXX in theory we should just fake
 719                                          * this buffer and continue like ext3,
 720                                          * especially if this is a partial read
 721                                          */
 722                                         CERROR("error read dir %lu+%llu: %d\n",
 723                                                inode->i_ino, *off, err);
 724                                         RETURN(err);
 725                                 }
 726                         }
 727                         if (!bh) {
 728                                 struct ext3_dir_entry_2 *fake = (void *)buf;
 729
 730                                 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
 731                                 memset(fake, 0, sizeof(*fake));
 732                                 fake->rec_len = cpu_to_le16(blksize);
 733                         }
 734                         count -= blksize;
 735                         buf += blksize;
 736                         *off += blksize;
 737                         rc += blksize;
 738                 }
 739         }
 740
 741         return rc;
 742 }
 743
 744 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
 745 {
 746         struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
 747
 748         fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
 749
 750         OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
 751 }
 752
 753 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
 754                                       void *handle, fsfilt_cb_t cb_func,
 755                                       void *cb_data)
 756 {
 757         struct fsfilt_cb_data *fcb;
 758
 759         OBD_SLAB_ALLOC(fcb, fcb_cache, CFS_ALLOC_IO, sizeof *fcb);
 760         if (fcb == NULL)
 761                 RETURN(-ENOMEM);
 762
 763         fcb->cb_func = cb_func;
 764         fcb->cb_obd = obd;
 765         fcb->cb_last_rcvd = last_rcvd;
 766         fcb->cb_data = cb_data;
 767
 768         CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
 769         lock_24kernel();
 770         journal_callback_set(handle, fsfilt_ext3_cb_func,
 771                              (struct journal_callback *)fcb);
 772         unlock_24kernel();
 773
 774         return 0;
 775 }
 776
 777 /*
 778  * We need to hack the return value for the free inode counts because
 779  * the current EA code requires one filesystem block per inode with EAs,
 780  * so it is possible to run out of blocks before we run out of inodes.
 781  *
 782  * This can be removed when the ext3 EA code is fixed.
 783  */
 784 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
 785 {
 786         struct kstatfs sfs;
 787         int rc;
 788
 789         memset(&sfs, 0, sizeof(sfs));
 790         rc = ll_do_statfs(sb,&sfs);
 791
 792         if (!rc && sfs.f_bfree < sfs.f_ffree) {
 793                 sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
 794                 sfs.f_ffree = sfs.f_bfree;
 795         }
 796
 797         statfs_pack(osfs, &sfs);
 798         return rc;
 799 }
 800
 801 static int fsfilt_ext3_sync(struct super_block *sb)
 802 {
 803         return ext3_force_commit(sb);
 804 }
 805
 806 #if defined(EXT3_MULTIBLOCK_ALLOCATOR) && (!defined(EXT3_EXT_CACHE_NO) || defined(EXT_CACHE_MARK))
 807 #warning "kernel code has old extents/mballoc patch, disabling"
 808 #undef EXT3_MULTIBLOCK_ALLOCATOR
 809 #endif
 810 #ifndef EXT3_EXTENTS_FL
 811 #define EXT3_EXTENTS_FL                 0x00080000 /* Inode uses extents */
 812 #endif
 813
 814 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
 815 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 816 #define ext3_up_truncate_sem(inode)  up_write(&EXT3_I(inode)->truncate_sem);
 817 #define ext3_down_truncate_sem(inode)  down_write(&EXT3_I(inode)->truncate_sem);
 818 #elif (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 819 #define ext3_up_truncate_sem(inode)  up(&EXT3_I(inode)->truncate_sem);
 820 #define ext3_down_truncate_sem(inode)  down(&EXT3_I(inode)->truncate_sem);
 821 #else
 822 #define ext3_up_truncate_sem(inode)  mutex_unlock(&EXT3_I(inode)->truncate_mutex);
 823 #define ext3_down_truncate_sem(inode)  mutex_lock(&EXT3_I(inode)->truncate_mutex);
 824 #endif
 825
 826 #ifndef EXT_ASSERT
 827 #define EXT_ASSERT(cond)  BUG_ON(!(cond))
 828 #endif
 829
 830 #ifdef EXT3_EXT_HAS_NO_TREE
 831 /* for kernels 2.6.18 and later */
 832 #define ext3_ext_base                   inode
 833 #define ext3_ext_base2inode(inode)      (inode)
 834 #define EXT_DEPTH(inode)                ext_depth(inode)
 835 #define EXT_GENERATION(inode)           ext_generation(inode)
 836 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
 837                         ext3_ext_walk_space(inode, block, num, cb, cbdata);
 838 #else
 839 #define ext3_ext_base                   ext3_extents_tree
 840 #define ext3_ext_base2inode(tree)       (tree->inode)
 841 #define fsfilt_ext3_ext_walk_space(tree, block, num, cb, cbdata) \
 842                         ext3_ext_walk_space(tree, block, num, cb);
 843 #endif
 844
 845 #include <linux/lustre_version.h>
 846 #if EXT3_EXT_MAGIC == 0xf301
 847 #define ee_start e_start
 848 #define ee_block e_block
 849 #define ee_len   e_num
 850 #endif
 851 #ifndef EXT3_BB_MAX_BLOCKS
 852 #define ext3_mb_new_blocks(handle, inode, goal, count, aflags, err) \
 853         ext3_new_blocks(handle, inode, count, goal, err)
 854 #endif
 855
 856 struct bpointers {
 857         unsigned long *blocks;
 858         int *created;
 859         unsigned long start;
 860         int num;
 861         int init_num;
 862         int create;
 863 };
 864
 865 static int ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
 866                               unsigned long block, int *aflags)
 867 {
 868         struct ext3_inode_info *ei = EXT3_I(inode);
 869         unsigned long bg_start;
 870         unsigned long colour;
 871         int depth;
 872
 873         if (path) {
 874                 struct ext3_extent *ex;
 875                 depth = path->p_depth;
 876
 877                 /* try to predict block placement */
 878                 if ((ex = path[depth].p_ext)) {
 879 #if 0
 880                         /* This prefers to eat into a contiguous extent
 881                          * rather than find an extent that the whole
 882                          * request will fit into.  This can fragment data
 883                          * block allocation and prevents our lovely 1M I/Os
 884                          * from reaching the disk intact. */
 885                         if (ex->ee_block + ex->ee_len == block)
 886                                 *aflags |= 1;
 887 #endif
 888                         return ex->ee_start + (block - ex->ee_block);
 889                 }
 890
 891                 /* it looks index is empty
 892                  * try to find starting from index itself */
 893                 if (path[depth].p_bh)
 894                         return path[depth].p_bh->b_blocknr;
 895         }
 896
 897         /* OK. use inode's group */
 898         bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
 899                 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
 900         colour = (current->pid % 16) *
 901                 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
 902         return bg_start + colour + block;
 903 }
 904
 905 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 906 #include <linux/locks.h>
 907 static void ll_unmap_underlying_metadata(struct super_block *sb,
 908                                          unsigned long blocknr)
 909 {
 910         struct buffer_head *old_bh;
 911
 912         old_bh = get_hash_table(sb->s_dev, blocknr, sb->s_blocksize);
 913         if (old_bh) {
 914                 mark_buffer_clean(old_bh);
 915                 wait_on_buffer(old_bh);
 916                 clear_bit(BH_Req, &old_bh->b_state);
 917                 __brelse(old_bh);
 918         }
 919 }
 920 #else
 921 #define ll_unmap_underlying_metadata(sb, blocknr) \
 922         unmap_underlying_metadata((sb)->s_bdev, blocknr)
 923 #endif
 924
 925 #ifndef EXT3_MB_HINT_GROUP_ALLOC
 926 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
 927                                 struct ext3_ext_path *path, unsigned long block,
 928                                 unsigned long *count, int *err)
 929 {
 930         unsigned long pblock, goal;
 931         int aflags = 0;
 932         struct inode *inode = ext3_ext_base2inode(base);
 933
 934         goal = ext3_ext_find_goal(inode, path, block, &aflags);
 935         aflags |= 2; /* block have been already reserved */
 936         lock_24kernel();
 937         pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
 938         unlock_24kernel();
 939         return pblock;
 940
 941 }
 942 #else
 943 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
 944                                 struct ext3_ext_path *path, unsigned long block,
 945                                 unsigned long *count, int *err)
 946 {
 947         struct inode *inode = ext3_ext_base2inode(base);
 948         struct ext3_allocation_request ar;
 949         unsigned long pblock;
 950         int aflags;
 951
 952         /* find neighbour allocated blocks */
 953         ar.lleft = block;
 954         *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
 955         if (*err)
 956                 return 0;
 957         ar.lright = block;
 958         *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
 959         if (*err)
 960                 return 0;
 961
 962         /* allocate new block */
 963         ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
 964         ar.inode = inode;
 965         ar.logical = block;
 966         ar.len = *count;
 967         ar.flags = EXT3_MB_HINT_DATA;
 968         pblock = ext3_mb_new_blocks(handle, &ar, err);
 969         *count = ar.len;
 970         return pblock;
 971 }
 972 #endif
 973
 974 #ifdef EXT3_EXT_HAS_NO_TREE
 975 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
 976                                   struct ext3_ext_path *path,
 977                                   struct ext3_ext_cache *cex,
 978 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
 979                                   struct ext3_extent *ex,
 980 #endif
 981                                   void *cbdata)
 982 {
 983         struct bpointers *bp = cbdata;
 984 #else
 985 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
 986                                   struct ext3_ext_path *path,
 987                                   struct ext3_ext_cache *cex
 988 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
 989                                   , struct ext3_extent *ex
 990 #endif
 991                                  )
 992 {
 993         struct bpointers *bp = base->private;
 994 #endif
 995         struct inode *inode = ext3_ext_base2inode(base);
 996         struct ext3_extent nex;
 997         unsigned long pblock;
 998         unsigned long tgen;
 999         int err, i;
1000         unsigned long count;
1001         handle_t *handle;
1002
1003         i = EXT_DEPTH(base);
1004         EXT_ASSERT(i == path->p_depth);
1005         EXT_ASSERT(path[i].p_hdr);
1006
1007         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1008                 err = EXT_CONTINUE;
1009                 goto map;
1010         }
1011
1012         if (bp->create == 0) {
1013                 i = 0;
1014                 if (cex->ec_block < bp->start)
1015                         i = bp->start - cex->ec_block;
1016                 if (i >= cex->ec_len)
1017                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1018                                         i, cex->ec_len);
1019                 for (; i < cex->ec_len && bp->num; i++) {
1020                         *(bp->created) = 0;
1021                         bp->created++;
1022                         *(bp->blocks) = 0;
1023                         bp->blocks++;
1024                         bp->num--;
1025                         bp->start++;
1026                 }
1027
1028                 return EXT_CONTINUE;
1029         }
1030
1031         tgen = EXT_GENERATION(base);
1032         count = ext3_ext_calc_credits_for_insert(base, path);
1033         ext3_up_truncate_sem(inode);
1034
1035         lock_24kernel();
1036         handle = fsfilt_ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
1037         unlock_24kernel();
1038         if (IS_ERR(handle)) {
1039                 ext3_down_truncate_sem(inode);
1040                 return PTR_ERR(handle);
1041         }
1042
1043         ext3_down_truncate_sem(inode);
1044         if (tgen != EXT_GENERATION(base)) {
1045                 /* the tree has changed. so path can be invalid at moment */
1046                 lock_24kernel();
1047                 fsfilt_ext3_journal_stop(handle);
1048                 unlock_24kernel();
1049                 return EXT_REPEAT;
1050         }
1051
1052         count = cex->ec_len;
1053         pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
1054         if (!pblock)
1055                 goto out;
1056         EXT_ASSERT(count <= cex->ec_len);
1057
1058         /* insert new extent */
1059         nex.ee_block = cex->ec_block;
1060         nex.ee_start = pblock;
1061         nex.ee_len = count;
1062         err = ext3_ext_insert_extent(handle, base, path, &nex);
1063         if (err) {
1064                 CERROR("can't insert extent: %d\n", err);
1065                 /* XXX: export ext3_free_blocks() */
1066                 /*ext3_free_blocks(handle, inode, nex.ee_start, nex.ee_len, 0);*/
1067                 goto out;
1068         }
1069
1070         /*
1071          * Putting len of the actual extent we just inserted,
1072          * we are asking ext3_ext_walk_space() to continue
1073          * scaning after that block
1074          */
1075         cex->ec_len = nex.ee_len;
1076         cex->ec_start = nex.ee_start;
1077         BUG_ON(nex.ee_len == 0);
1078         BUG_ON(nex.ee_block != cex->ec_block);
1079
1080 out:
1081         lock_24kernel();
1082         fsfilt_ext3_journal_stop(handle);
1083         unlock_24kernel();
1084 map:
1085         if (err >= 0) {
1086                 /* map blocks */
1087                 if (bp->num == 0) {
1088                         CERROR("hmm. why do we find this extent?\n");
1089                         CERROR("initial space: %lu:%u\n",
1090                                 bp->start, bp->init_num);
1091                         CERROR("current extent: %u/%u/%u %d\n",
1092                                 cex->ec_block, cex->ec_len,
1093                                 cex->ec_start, cex->ec_type);
1094                 }
1095                 i = 0;
1096                 if (cex->ec_block < bp->start)
1097                         i = bp->start - cex->ec_block;
1098                 if (i >= cex->ec_len)
1099                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1100                                         i, cex->ec_len);
1101                 for (; i < cex->ec_len && bp->num; i++) {
1102                         *(bp->blocks) = cex->ec_start + i;
1103                         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1104                                 *(bp->created) = 0;
1105                         } else {
1106                                 *(bp->created) = 1;
1107                                 /* unmap any possible underlying metadata from
1108                                  * the block device mapping.  bug 6998. */
1109                                 ll_unmap_underlying_metadata(inode->i_sb,
1110                                                              *(bp->blocks));
1111                         }
1112                         bp->created++;
1113                         bp->blocks++;
1114                         bp->num--;
1115                         bp->start++;
1116                 }
1117         }
1118         return err;
1119 }
1120
1121 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1122                        unsigned long num, unsigned long *blocks,
1123                        int *created, int create)
1124 {
1125 #ifdef EXT3_EXT_HAS_NO_TREE
1126         struct ext3_ext_base *base = inode;
1127 #else
1128         struct ext3_extents_tree tree;
1129         struct ext3_ext_base *base = &tree;
1130 #endif
1131         struct bpointers bp;
1132         int err;
1133
1134         CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1135                block, block + num - 1, (unsigned) inode->i_ino);
1136
1137 #ifndef EXT3_EXT_HAS_NO_TREE
1138         ext3_init_tree_desc(base, inode);
1139         tree.private = &bp;
1140 #endif
1141         bp.blocks = blocks;
1142         bp.created = created;
1143         bp.start = block;
1144         bp.init_num = bp.num = num;
1145         bp.create = create;
1146
1147         ext3_down_truncate_sem(inode);
1148         err = fsfilt_ext3_ext_walk_space(base, block, num, ext3_ext_new_extent_cb, &bp);
1149         ext3_ext_invalidate_cache(base);
1150         ext3_up_truncate_sem(inode);
1151
1152         return err;
1153 }
1154
1155 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1156                                     int pages, unsigned long *blocks,
1157                                     int *created, int create)
1158 {
1159         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1160         int rc = 0, i = 0;
1161         struct page *fp = NULL;
1162         int clen = 0;
1163
1164         CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1165                 inode->i_ino, pages, (*page)->index);
1166
1167         /* pages are sorted already. so, we just have to find
1168          * contig. space and process them properly */
1169         while (i < pages) {
1170                 if (fp == NULL) {
1171                         /* start new extent */
1172                         fp = *page++;
1173                         clen = 1;
1174                         i++;
1175                         continue;
1176                 } else if (fp->index + clen == (*page)->index) {
1177                         /* continue the extent */
1178                         page++;
1179                         clen++;
1180                         i++;
1181                         continue;
1182                 }
1183
1184                 /* process found extent */
1185                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1186                                         clen * blocks_per_page, blocks,
1187                                         created, create);
1188                 if (rc)
1189                         GOTO(cleanup, rc);
1190
1191                 /* look for next extent */
1192                 fp = NULL;
1193                 blocks += blocks_per_page * clen;
1194                 created += blocks_per_page * clen;
1195         }
1196
1197         if (fp)
1198                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1199                                         clen * blocks_per_page, blocks,
1200                                         created, create);
1201 cleanup:
1202         return rc;
1203 }
1204 #endif /* EXT3_MULTIBLOCK_ALLOCATOR */
1205
1206 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1207                                unsigned long *blocks, int *created, int create);
1208 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1209                                    int pages, unsigned long *blocks,
1210                                    int *created, int create)
1211 {
1212         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1213         unsigned long *b;
1214         int rc = 0, i, *cr;
1215
1216         for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1217                 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1218                 if (rc) {
1219                         CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1220                                inode->i_ino, *b, *cr, create, rc);
1221                         break;
1222                 }
1223
1224                 b += blocks_per_page;
1225                 cr += blocks_per_page;
1226         }
1227         return rc;
1228 }
1229
1230 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1231                                 int pages, unsigned long *blocks,
1232                                 int *created, int create,
1233                                 struct semaphore *optional_sem)
1234 {
1235         int rc;
1236 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
1237         if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1238                 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1239                                                      blocks, created, create);
1240                 return rc;
1241         }
1242 #endif
1243         if (optional_sem != NULL)
1244                 down(optional_sem);
1245         rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1246                                             created, create);
1247         if (optional_sem != NULL)
1248                 up(optional_sem);
1249
1250         return rc;
1251 }
1252
1253 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1254                                    int size, loff_t *offs)
1255 {
1256         struct inode *inode = file->f_dentry->d_inode;
1257         unsigned long block;
1258         struct buffer_head *bh;
1259         int err, blocksize, csize, boffs;
1260
1261         /* prevent reading after eof */
1262         lock_kernel();
1263         if (i_size_read(inode) < *offs + size) {
1264                 size = i_size_read(inode) - *offs;
1265                 unlock_kernel();
1266                 if (size < 0) {
1267                         CERROR("size %llu is too short for read %u@%llu\n",
1268                                i_size_read(inode), size, *offs);
1269                         return -EIO;
1270                 } else if (size == 0) {
1271                         return 0;
1272                 }
1273         } else {
1274                 unlock_kernel();
1275         }
1276
1277         blocksize = 1 << inode->i_blkbits;
1278
1279         while (size > 0) {
1280                 block = *offs >> inode->i_blkbits;
1281                 boffs = *offs & (blocksize - 1);
1282                 csize = min(blocksize - boffs, size);
1283                 bh = ext3_bread(NULL, inode, block, 0, &err);
1284                 if (!bh) {
1285                         CERROR("can't read block: %d\n", err);
1286                         return err;
1287                 }
1288
1289                 memcpy(buf, bh->b_data + boffs, csize);
1290                 brelse(bh);
1291
1292                 *offs += csize;
1293                 buf += csize;
1294                 size -= csize;
1295         }
1296         return 0;
1297 }
1298
1299 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1300                                     loff_t *offs, int force_sync)
1301 {
1302         struct buffer_head *bh = NULL;
1303         unsigned long block;
1304         struct inode *inode = file->f_dentry->d_inode;
1305         loff_t old_size = i_size_read(inode), offset = *offs;
1306         loff_t new_size = i_size_read(inode);
1307         handle_t *handle;
1308         int err = 0, block_count = 0, blocksize, size, boffs;
1309
1310         /* Determine how many transaction credits are needed */
1311         blocksize = 1 << inode->i_blkbits;
1312         block_count = (*offs & (blocksize - 1)) + bufsize;
1313         block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1314
1315         lock_24kernel();
1316         handle = fsfilt_ext3_journal_start(inode,
1317                                block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1318         unlock_24kernel();
1319         if (IS_ERR(handle)) {
1320                 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1321                        block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1322                 return PTR_ERR(handle);
1323         }
1324
1325         while (bufsize > 0) {
1326                 if (bh != NULL)
1327                         brelse(bh);
1328
1329                 block = offset >> inode->i_blkbits;
1330                 boffs = offset & (blocksize - 1);
1331                 size = min(blocksize - boffs, bufsize);
1332                 bh = ext3_bread(handle, inode, block, 1, &err);
1333                 if (!bh) {
1334                         CERROR("can't read/create block: %d\n", err);
1335                         goto out;
1336                 }
1337
1338                 err = ext3_journal_get_write_access(handle, bh);
1339                 if (err) {
1340                         CERROR("journal_get_write_access() returned error %d\n",
1341                                err);
1342                         goto out;
1343                 }
1344                 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1345                 memcpy(bh->b_data + boffs, buf, size);
1346                 err = ext3_journal_dirty_metadata(handle, bh);
1347                 if (err) {
1348                         CERROR("journal_dirty_metadata() returned error %d\n",
1349                                err);
1350                         goto out;
1351                 }
1352                 if (offset + size > new_size)
1353                         new_size = offset + size;
1354                 offset += size;
1355                 bufsize -= size;
1356                 buf += size;
1357         }
1358
1359         if (force_sync)
1360                 handle->h_sync = 1; /* recovery likes this */
1361 out:
1362         if (bh)
1363                 brelse(bh);
1364
1365         /* correct in-core and on-disk sizes */
1366         if (new_size > i_size_read(inode)) {
1367                 lock_kernel();
1368                 if (new_size > i_size_read(inode))
1369                         i_size_write(inode, new_size);
1370                 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1371                         EXT3_I(inode)->i_disksize = i_size_read(inode);
1372                 if (i_size_read(inode) > old_size)
1373                         mark_inode_dirty(inode);
1374                 unlock_kernel();
1375         }
1376
1377         lock_24kernel();
1378         fsfilt_ext3_journal_stop(handle);
1379         unlock_24kernel();
1380
1381         if (err == 0)
1382                 *offs = offset;
1383         return err;
1384 }
1385
1386 static int fsfilt_ext3_setup(struct super_block *sb)
1387 {
1388         struct ext3_sb_info *sbi = EXT3_SB(sb);
1389 #if 0
1390         sbi->dx_lock = fsfilt_ext3_dx_lock;
1391         sbi->dx_unlock = fsfilt_ext3_dx_unlock;
1392 #endif
1393 #ifdef S_PDIROPS
1394         CWARN("Enabling PDIROPS\n");
1395         set_opt(sbi->s_mount_opt, PDIROPS);
1396         sb->s_flags |= S_PDIROPS;
1397 #endif
1398         if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1399                 CWARN("filesystem doesn't have dir_index feature enabled\n");
1400 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,6)) && HAVE_QUOTA_SUPPORT
1401         /* enable journaled quota support */
1402         /* kfreed in ext3_put_super() */
1403         sbi->s_qf_names[USRQUOTA] = kstrdup("lquota.user.reserved", GFP_KERNEL);
1404         if (!sbi->s_qf_names[USRQUOTA])
1405                 return -ENOMEM;
1406         sbi->s_qf_names[GRPQUOTA] = kstrdup("lquota.group.reserved", GFP_KERNEL);
1407         if (!sbi->s_qf_names[GRPQUOTA]) {
1408                 kfree(sbi->s_qf_names[USRQUOTA]);
1409                 sbi->s_qf_names[USRQUOTA] = NULL;
1410                 return -ENOMEM;
1411         }
1412         sbi->s_jquota_fmt = QFMT_VFS_V0;
1413 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
1414         set_opt(sbi->s_mount_opt, QUOTA);
1415 #endif
1416 #endif
1417         return 0;
1418 }
1419
1420 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1421    objects. Logs is number of logfiles to update */
1422 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1423 {
1424         if ( !fso ) {
1425                 switch(op) {
1426                 case FSFILT_OP_CREATE:
1427                                  /* directory leaf, index & indirect & EA*/
1428                         return 4 + 3 * logs;
1429                 case FSFILT_OP_UNLINK:
1430                         return 3 * logs;
1431                 }
1432         } else {
1433                 int i;
1434                 int needed = 0;
1435                 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1436                 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1437                 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1438                 for (i = 0; i < op; i++, fso++) {
1439                         int nblocks = fso->fso_bufcnt * blockpp;
1440                         int ndindirect = min(nblocks, addrpp + 1);
1441                         int nindir = nblocks + ndindirect + 1;
1442
1443                         needed += nindir;
1444                 }
1445                 return needed + 3 * logs;
1446         }
1447
1448         return 0;
1449 }
1450
1451 #define DQINFO_COPY(out, in)                    \
1452 do {                                            \
1453         Q_COPY(out, in, dqi_bgrace);            \
1454         Q_COPY(out, in, dqi_igrace);            \
1455         Q_COPY(out, in, dqi_flags);             \
1456         Q_COPY(out, in, dqi_valid);             \
1457 } while (0)
1458
1459 #define DQBLK_COPY(out, in)                     \
1460 do {                                            \
1461         Q_COPY(out, in, dqb_bhardlimit);        \
1462         Q_COPY(out, in, dqb_bsoftlimit);        \
1463         Q_COPY(out, in, dqb_curspace);          \
1464         Q_COPY(out, in, dqb_ihardlimit);        \
1465         Q_COPY(out, in, dqb_isoftlimit);        \
1466         Q_COPY(out, in, dqb_curinodes);         \
1467         Q_COPY(out, in, dqb_btime);             \
1468         Q_COPY(out, in, dqb_itime);             \
1469         Q_COPY(out, in, dqb_valid);             \
1470 } while (0)
1471
1472
1473
1474 static int fsfilt_ext3_quotactl(struct super_block *sb,
1475                                 struct obd_quotactl *oqc)
1476 {
1477         int i, rc = 0, error = 0;
1478         struct quotactl_ops *qcop;
1479         struct if_dqinfo *info;
1480         struct if_dqblk *dqblk;
1481         ENTRY;
1482
1483         if (!sb->s_qcop)
1484                 RETURN(-ENOSYS);
1485
1486         OBD_ALLOC_PTR(info);
1487         if (!info)
1488                 RETURN(-ENOMEM);
1489         OBD_ALLOC_PTR(dqblk);
1490         if (!dqblk) {
1491                 OBD_FREE_PTR(info);
1492                 RETURN(-ENOMEM);
1493         }
1494
1495         DQINFO_COPY(info, &oqc->qc_dqinfo);
1496         DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1497
1498         qcop = sb->s_qcop;
1499         if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1500                 for (i = 0; i < MAXQUOTAS; i++) {
1501                         if (!Q_TYPESET(oqc, i))
1502                                 continue;
1503
1504                         if (oqc->qc_cmd == Q_QUOTAON) {
1505                                 lustre_quota_version_t qfmt = oqc->qc_id;
1506                                 char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1507
1508                                 if (!qcop->quota_on)
1509                                         GOTO(out, rc = -ENOSYS);
1510
1511                                 rc = qcop->quota_on(sb, i, QFMT_VFS_V0,
1512                                                     name[qfmt][i]);
1513 #ifdef HAVE_QUOTA64
1514                                 if (rc == -ENOENT || rc == -EINVAL) {
1515                                         /* see bug 13904 */
1516                                         rc = lustre_slave_quota_convert(qfmt, i);
1517                                         if (!rc)
1518                                                 rc = qcop->quota_on(sb, i,
1519                                                                 QFMT_VFS_V0,
1520                                                                 name[qfmt][i]);
1521                                         else if (rc == -ESTALE)
1522                                                 rc = -ENOENT;
1523                                 }
1524 #endif
1525                         } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1526                                 if (!qcop->quota_off)
1527                                         GOTO(out, rc = -ENOSYS);
1528                                 rc = qcop->quota_off(sb, i);
1529                         }
1530
1531                         if (rc == -EBUSY)
1532                                 error = rc;
1533                         else if (rc)
1534                                 GOTO(out, rc);
1535                 }
1536                 GOTO(out, rc ?: error);
1537         }
1538
1539         switch (oqc->qc_cmd) {
1540         case Q_GETOINFO:
1541         case Q_GETINFO:
1542                 if (!qcop->get_info)
1543                         GOTO(out, rc = -ENOSYS);
1544                 rc = qcop->get_info(sb, oqc->qc_type, info);
1545                 break;
1546         case Q_SETQUOTA:
1547         case Q_INITQUOTA:
1548                 if (!qcop->set_dqblk)
1549                         GOTO(out, rc = -ENOSYS);
1550                 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1551                 break;
1552         case Q_GETOQUOTA:
1553         case Q_GETQUOTA:
1554                 if (!qcop->get_dqblk)
1555                         GOTO(out, rc = -ENOSYS);
1556                 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1557                 if (!rc)
1558                         dqblk->dqb_valid = QIF_LIMITS | QIF_USAGE;
1559                 break;
1560         case Q_SYNC:
1561                 if (!sb->s_qcop->quota_sync)
1562                         GOTO(out, rc = -ENOSYS);
1563                 qcop->quota_sync(sb, oqc->qc_type);
1564                 break;
1565         case Q_FINVALIDATE:
1566                 CDEBUG(D_WARNING, "invalidating operational quota files\n");
1567                 for (i = 0; i < MAXQUOTAS; i++) {
1568                         struct file *fp;
1569                         lustre_quota_version_t qfmt = oqc->qc_id;
1570                         char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1571
1572                         if (!Q_TYPESET(oqc, i))
1573                                 continue;
1574
1575                         fp = filp_open(name[qfmt][i], O_CREAT | O_TRUNC | O_RDWR, 0644);
1576                         if (IS_ERR(fp)) {
1577                                 rc = PTR_ERR(fp);
1578                                 CERROR("error invalidating operational quota file"
1579                                        " %s (rc:%d)\n", name[qfmt][i], rc);
1580                         } else {
1581                                 filp_close(fp, 0);
1582                         }
1583
1584                 }
1585                 break;
1586         default:
1587                 CERROR("unsupported quotactl command: %d\n", oqc->qc_cmd);
1588                 LBUG();
1589         }
1590 out:
1591         DQINFO_COPY(&oqc->qc_dqinfo, info);
1592         DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1593
1594         OBD_FREE_PTR(info);
1595         OBD_FREE_PTR(dqblk);
1596
1597         if (rc)
1598                 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %d "
1599                                 "failed: %d\n",
1600                        oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1601         RETURN(rc);
1602 }
1603
1604 struct chk_dqblk{
1605         struct hlist_node       dqb_hash;        /* quotacheck hash */
1606         struct list_head        dqb_list;        /* in list also */
1607         qid_t                   dqb_id;          /* uid/gid */
1608         short                   dqb_type;        /* USRQUOTA/GRPQUOTA */
1609         qsize_t                 dqb_bhardlimit;  /* block hard limit */
1610         qsize_t                 dqb_bsoftlimit;  /* block soft limit */
1611         qsize_t                 dqb_curspace;    /* current space */
1612         qsize_t                 dqb_ihardlimit;  /* inode hard limit */
1613         qsize_t                 dqb_isoftlimit;  /* inode soft limit */
1614         qsize_t                 dqb_curinodes;   /* current inodes */
1615         __u64                   dqb_btime;       /* block grace time */
1616         __u64                   dqb_itime;       /* inode grace time */
1617         __u32                   dqb_valid;       /* flag for above fields */
1618 };
1619
1620 static inline unsigned int chkquot_hash(qid_t id, int type)
1621                                         __attribute__((__const__));
1622
1623 static inline unsigned int chkquot_hash(qid_t id, int type)
1624 {
1625         return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1626 }
1627
1628 static inline struct chk_dqblk *
1629 find_chkquot(struct hlist_head *head, qid_t id, int type)
1630 {
1631         struct hlist_node *node;
1632         struct chk_dqblk *cdqb;
1633
1634         hlist_for_each(node, head) {
1635                 cdqb = hlist_entry(node, struct chk_dqblk, dqb_hash);
1636                 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1637                         return cdqb;
1638         }
1639
1640         return NULL;
1641 }
1642
1643 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1644 {
1645         struct chk_dqblk *cdqb;
1646
1647         OBD_ALLOC_PTR(cdqb);
1648         if (cdqb) {
1649                 INIT_HLIST_NODE(&cdqb->dqb_hash);
1650                 INIT_LIST_HEAD(&cdqb->dqb_list);
1651                 cdqb->dqb_id = id;
1652                 cdqb->dqb_type = type;
1653         }
1654
1655         return cdqb;
1656 }
1657
1658 static struct chk_dqblk *
1659 cqget(struct super_block *sb, struct hlist_head *hash, struct list_head *list,
1660       qid_t id, int type, int first_check)
1661 {
1662         struct hlist_head *head = hash + chkquot_hash(id, type);
1663         struct if_dqblk dqb;
1664         struct chk_dqblk *cdqb;
1665         int rc;
1666
1667         cdqb = find_chkquot(head, id, type);
1668         if (cdqb)
1669                 return cdqb;
1670
1671         cdqb = alloc_chkquot(id, type);
1672         if (!cdqb)
1673                 return NULL;
1674
1675         if (!first_check) {
1676                 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1677                 if (rc) {
1678                         CERROR("get_dqblk of id %u, type %d failed: %d\n",
1679                                id, type, rc);
1680                 } else {
1681                         DQBLK_COPY(cdqb, &dqb);
1682                         cdqb->dqb_curspace = 0;
1683                         cdqb->dqb_curinodes = 0;
1684                 }
1685         }
1686
1687         hlist_add_head(&cdqb->dqb_hash, head);
1688         list_add_tail(&cdqb->dqb_list, list);
1689
1690         return cdqb;
1691 }
1692
1693 static inline int quota_onoff(struct super_block *sb, int cmd, int type, int qfmt)
1694 {
1695         struct obd_quotactl *oqctl;
1696         int rc;
1697
1698         OBD_ALLOC_PTR(oqctl);
1699         if (!oqctl)
1700                 RETURN(-ENOMEM);
1701
1702         oqctl->qc_cmd = cmd;
1703         oqctl->qc_id = qfmt;
1704         oqctl->qc_type = type;
1705         rc = fsfilt_ext3_quotactl(sb, oqctl);
1706
1707         OBD_FREE_PTR(oqctl);
1708         return rc;
1709 }
1710
1711 static inline int read_old_dqinfo(struct super_block *sb, int type,
1712                                   struct if_dqinfo *dqinfo)
1713 {
1714         struct obd_quotactl *oqctl;
1715         int rc;
1716         ENTRY;
1717
1718         OBD_ALLOC_PTR(oqctl);
1719         if (!oqctl)
1720                 RETURN(-ENOMEM);
1721
1722         oqctl->qc_cmd = Q_GETINFO;
1723         oqctl->qc_type = type;
1724         rc = fsfilt_ext3_quotactl(sb, oqctl);
1725         if (!rc)
1726                 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1727
1728         OBD_FREE_PTR(oqctl);
1729         RETURN(rc);
1730 }
1731
1732 static inline struct ext3_group_desc *
1733 get_group_desc(struct super_block *sb, int group)
1734 {
1735         unsigned long desc_block, desc;
1736         struct ext3_group_desc *gdp;
1737
1738         desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1739         desc = group % EXT3_DESC_PER_BLOCK(sb);
1740         gdp = (struct ext3_group_desc *)
1741               EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1742
1743         return gdp + desc;
1744 }
1745
1746 static inline struct buffer_head *
1747 read_inode_bitmap(struct super_block *sb, unsigned long group)
1748 {
1749         struct ext3_group_desc *desc;
1750         struct buffer_head *bh;
1751
1752         desc = get_group_desc(sb, group);
1753         bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
1754
1755         return bh;
1756 }
1757
1758 static inline struct inode *ext3_iget_inuse(struct super_block *sb,
1759                                      struct buffer_head *bitmap_bh,
1760                                      int index, unsigned long ino)
1761 {
1762         struct inode *inode = NULL;
1763
1764         if (ext3_test_bit(index, bitmap_bh->b_data))
1765                 inode = iget(sb, ino);
1766
1767         return inode;
1768 }
1769
1770 struct qchk_ctxt {
1771         struct hlist_head       qckt_hash[NR_DQHASH];        /* quotacheck hash */
1772         struct list_head        qckt_list;                   /* quotacheck list */
1773         int                     qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1774         struct if_dqinfo        qckt_dqinfo[MAXQUOTAS];      /* old dqinfo */
1775 };
1776
1777 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1778                            struct obd_quotactl *oqc)
1779 {
1780         struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1781         loff_t size = 0;
1782         qid_t qid[MAXQUOTAS];
1783         int cnt, i, rc = 0;
1784
1785         if (!inode)
1786                 return 0;
1787
1788         qid[USRQUOTA] = inode->i_uid;
1789         qid[GRPQUOTA] = inode->i_gid;
1790
1791         if (S_ISDIR(inode->i_mode) ||
1792             S_ISREG(inode->i_mode) ||
1793             S_ISLNK(inode->i_mode))
1794                 size = inode_get_bytes(inode);
1795
1796         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1797                 if (!Q_TYPESET(oqc, cnt))
1798                         continue;
1799
1800                 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1801                                 &qctxt->qckt_list, qid[cnt], cnt,
1802                                 qctxt->qckt_first_check[cnt]);
1803                 if (!cdqb[cnt]) {
1804                         rc = -ENOMEM;
1805                         break;
1806                 }
1807
1808                 cdqb[cnt]->dqb_curspace += size;
1809                 cdqb[cnt]->dqb_curinodes++;
1810         }
1811
1812         if (rc) {
1813                 for (i = 0; i < cnt; i++) {
1814                         if (!Q_TYPESET(oqc, i))
1815                                 continue;
1816                         LASSERT(cdqb[i]);
1817                         cdqb[i]->dqb_curspace -= size;
1818                         cdqb[i]->dqb_curinodes--;
1819                 }
1820         }
1821
1822         return rc;
1823 }
1824
1825 static int v2_write_dqheader(struct file *f, int type)
1826 {
1827         static const __u32 quota_magics[] = V2_INITQMAGICS;
1828 #ifdef HAVE_QUOTA64
1829         static const __u32 quota_versions[] = V2_INITQVERSIONS_R0;
1830 #else
1831         static const __u32 quota_versions[] = V2_INITQVERSIONS;
1832 #endif
1833         struct v2_disk_dqheader dqhead;
1834         loff_t offset = 0;
1835
1836         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1837         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1838
1839         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1840         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1841
1842         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1843 }
1844
1845 /* write dqinfo struct in a new quota file */
1846 static int v2_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1847 {
1848         struct v2_disk_dqinfo dqinfo;
1849         __u32 blocks = V2_DQTREEOFF + 1;
1850         loff_t offset = V2_DQINFOOFF;
1851
1852         if (info) {
1853                 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1854                 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1855                 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1856                                                ~DQF_INFO_DIRTY);
1857         } else {
1858                 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1859                 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1860                 dqinfo.dqi_flags = 0;
1861         }
1862
1863         dqinfo.dqi_blocks = cpu_to_le32(blocks);
1864         dqinfo.dqi_free_blk = 0;
1865         dqinfo.dqi_free_entry = 0;
1866
1867         return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1868 }
1869
1870 #ifdef HAVE_QUOTA64
1871 static int v3_write_dqheader(struct file *f, int type)
1872 {
1873         static const __u32 quota_magics[] = V2_INITQMAGICS;
1874         static const __u32 quota_versions[] = V2_INITQVERSIONS_R1;
1875         struct v2_disk_dqheader dqhead;
1876         loff_t offset = 0;
1877
1878         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1879         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1880
1881         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1882         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1883
1884         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1885 }
1886
1887 /* write dqinfo struct in a new quota file */
1888 static int v3_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1889 {
1890         return v2_write_dqinfo(f, type, info);
1891 }
1892 #endif
1893
1894 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1895                                   struct obd_quotactl *oqc)
1896 {
1897         int i, rc = 0;
1898         ENTRY;
1899
1900         for (i = 0; i < MAXQUOTAS; i++) {
1901                 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1902                                          NULL : &qctxt->qckt_dqinfo[i];
1903                 struct file *file;
1904                 const char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1905                 int (*write_dqheader)(struct file *, int);
1906                 int (*write_dqinfo)(struct file *, int, struct if_dqinfo *);
1907
1908                 if (!Q_TYPESET(oqc, i))
1909                         continue;
1910
1911                 file = filp_open(name[oqc->qc_id][i],
1912                                  O_RDWR | O_CREAT | O_TRUNC, 0644);
1913                 if (IS_ERR(file)) {
1914                         rc = PTR_ERR(file);
1915                         CERROR("can't create %s file: rc = %d\n",
1916                                name[oqc->qc_id][i], rc);
1917                         GOTO(out, rc);
1918                 }
1919
1920                 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1921                         CERROR("file %s is not regular", name[oqc->qc_id][i]);
1922                         filp_close(file, 0);
1923                         GOTO(out, rc = -EINVAL);
1924                 }
1925
1926                 DQUOT_DROP(file->f_dentry->d_inode);
1927
1928                 switch (oqc->qc_id) {
1929                 case LUSTRE_QUOTA_V1 : write_dqheader = v2_write_dqheader;
1930                                        write_dqinfo   = v2_write_dqinfo;
1931                                        break;
1932 #ifdef HAVE_QUOTA64
1933                 case LUSTRE_QUOTA_V2 : write_dqheader = v3_write_dqheader;
1934                                        write_dqinfo   = v3_write_dqinfo;
1935                                        break;
1936 #endif
1937                 default              : CERROR("unknown quota format!\n");
1938                                        LBUG();
1939                 }
1940
1941                 rc = (*write_dqheader)(file, i);
1942                 if (rc) {
1943                         filp_close(file, 0);
1944                         GOTO(out, rc);
1945                 }
1946
1947                 rc = (*write_dqinfo)(file, i, info);
1948                 filp_close(file, 0);
1949                 if (rc)
1950                         GOTO(out, rc);
1951         }
1952
1953 out:
1954         RETURN(rc);
1955 }
1956
1957
1958 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1959                           struct chk_dqblk *cdqb)
1960 {
1961         struct obd_quotactl *oqc;
1962         long now;
1963         int rc;
1964         ENTRY;
1965
1966         OBD_ALLOC_PTR(oqc);
1967         if (!oqc)
1968                 RETURN(-ENOMEM);
1969
1970         now = CURRENT_SECONDS;
1971
1972         if (cdqb->dqb_bsoftlimit &&
1973             toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1974             !cdqb->dqb_btime)
1975                 cdqb->dqb_btime =
1976                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1977
1978         if (cdqb->dqb_isoftlimit &&
1979             cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1980             !cdqb->dqb_itime)
1981                 cdqb->dqb_itime =
1982                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1983
1984         cdqb->dqb_valid = QIF_ALL;
1985
1986         oqc->qc_cmd = Q_SETQUOTA;
1987         oqc->qc_type = cdqb->dqb_type;
1988         oqc->qc_id = cdqb->dqb_id;
1989         DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1990
1991         rc = fsfilt_ext3_quotactl(sb, oqc);
1992         OBD_FREE_PTR(oqc);
1993         RETURN(rc);
1994 }
1995
1996 static int prune_chkquots(struct super_block *sb,
1997                           struct qchk_ctxt *qctxt, int error)
1998 {
1999         struct chk_dqblk *cdqb, *tmp;
2000         int rc;
2001
2002         list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
2003                 if (!error) {
2004                         rc = commit_chkquot(sb, qctxt, cdqb);
2005                         if (rc)
2006                                 error = rc;
2007                 }
2008                 hlist_del_init(&cdqb->dqb_hash);
2009                 list_del(&cdqb->dqb_list);
2010                 OBD_FREE_PTR(cdqb);
2011         }
2012
2013         return error;
2014 }
2015
2016 static int fsfilt_ext3_quotacheck(struct super_block *sb,
2017                                   struct obd_quotactl *oqc)
2018 {
2019         struct ext3_sb_info *sbi = EXT3_SB(sb);
2020         int i, group;
2021         struct qchk_ctxt *qctxt;
2022         struct buffer_head *bitmap_bh = NULL;
2023         unsigned long ino;
2024         struct inode *inode;
2025         int rc = 0;
2026         ENTRY;
2027
2028         /* turn on quota and read dqinfo if existed */
2029         OBD_ALLOC_PTR(qctxt);
2030         if (!qctxt) {
2031                 oqc->qc_stat = -ENOMEM;
2032                 RETURN(-ENOMEM);
2033         }
2034
2035         for (i = 0; i < NR_DQHASH; i++)
2036                 INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
2037         INIT_LIST_HEAD(&qctxt->qckt_list);
2038
2039         for (i = 0; i < MAXQUOTAS; i++) {
2040                 if (!Q_TYPESET(oqc, i))
2041                         continue;
2042
2043                 rc = quota_onoff(sb, Q_QUOTAON, i, oqc->qc_id);
2044                 if (!rc || rc == -EBUSY) {
2045                         rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
2046                         if (rc)
2047                                 GOTO(out, rc);
2048                 } else if (rc == -ENOENT || rc == -EINVAL || rc == -EEXIST) {
2049                         qctxt->qckt_first_check[i] = 1;
2050                 } else if (rc) {
2051                         GOTO(out, rc);
2052                 }
2053         }
2054
2055         /* check quota and update in hash */
2056         for (group = 0; group < sbi->s_groups_count; group++) {
2057                 ino = group * sbi->s_inodes_per_group + 1;
2058                 bitmap_bh = read_inode_bitmap(sb, group);
2059                 if (!bitmap_bh) {
2060                         CERROR("read_inode_bitmap group %d failed", group);
2061                         GOTO(out, -EIO);
2062                 }
2063
2064                 for (i = 0; i < sbi->s_inodes_per_group; i++, ino++) {
2065                         if (ino < sbi->s_first_ino)
2066                                 continue;
2067
2068                         inode = ext3_iget_inuse(sb, bitmap_bh, i, ino);
2069                         rc = add_inode_quota(inode, qctxt, oqc);
2070                         iput(inode);
2071                         if (rc) {
2072                                 brelse(bitmap_bh);
2073                                 GOTO(out, rc);
2074                         }
2075                 }
2076
2077                 brelse(bitmap_bh);
2078         }
2079
2080         /* read old quota limits from old quota file. (only for the user
2081          * has limits but hasn't file) */
2082 #ifdef HAVE_QUOTA_SUPPORT
2083         for (i = 0; i < MAXQUOTAS; i++) {
2084                 struct list_head id_list;
2085                 struct dquot_id *dqid, *tmp;
2086
2087                 if (!Q_TYPESET(oqc, i))
2088                         continue;
2089
2090                 if (qctxt->qckt_first_check[i])
2091                         continue;
2092
2093
2094                 LASSERT(sb_dqopt(sb)->files[i] != NULL);
2095                 INIT_LIST_HEAD(&id_list);
2096 #ifndef KERNEL_SUPPORTS_QUOTA_READ
2097                 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
2098 #else
2099                 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
2100 #endif
2101                 if (rc)
2102                         CERROR("read old limits failed. (rc:%d)\n", rc);
2103
2104                 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
2105                         list_del_init(&dqid->di_link);
2106
2107                         if (!rc)
2108                                 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
2109                                       dqid->di_id, i,
2110                                       qctxt->qckt_first_check[i]);
2111                         kfree(dqid);
2112                 }
2113         }
2114 #endif
2115         /* turn off quota cause we are to dump chk_dqblk to files */
2116         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2117
2118         rc = create_new_quota_files(qctxt, oqc);
2119         if (rc)
2120                 GOTO(out, rc);
2121
2122         /* we use vfs functions to set dqblk, so turn quota on */
2123         rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type, oqc->qc_id);
2124 out:
2125         /* dump and free chk_dqblk */
2126         rc = prune_chkquots(sb, qctxt, rc);
2127         OBD_FREE_PTR(qctxt);
2128
2129         /* turn off quota, `lfs quotacheck` will turn on when all
2130          * nodes quotacheck finish. */
2131         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2132
2133         oqc->qc_stat = rc;
2134         if (rc)
2135                 CERROR("quotacheck failed: rc = %d\n", rc);
2136
2137         RETURN(rc);
2138 }
2139
2140 #ifdef HAVE_QUOTA_SUPPORT
2141 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
2142                                  int cmd)
2143 {
2144         int rc = 0;
2145         ENTRY;
2146
2147         if (lqi->qi_files[type] == NULL) {
2148                 CERROR("operate qinfo before it's enabled!\n");
2149                 RETURN(-EIO);
2150         }
2151
2152         switch (cmd) {
2153         case QFILE_CHK:
2154                 rc = lustre_check_quota_file(lqi, type);
2155                 break;
2156         case QFILE_RD_INFO:
2157                 rc = lustre_read_quota_info(lqi, type);
2158                 break;
2159         case QFILE_WR_INFO:
2160                 rc = lustre_write_quota_info(lqi, type);
2161                 break;
2162         case QFILE_INIT_INFO:
2163                 rc = lustre_init_quota_info(lqi, type);
2164                 break;
2165         case QFILE_CONVERT:
2166                 rc = lustre_quota_convert(lqi, type);
2167                 break;
2168         default:
2169                 rc = -ENOTSUPP;
2170                 CERROR("Unsupported admin quota file cmd %d\n"
2171                        "Are lquota.ko and fsfilt_ldiskfs.ko modules in sync?\n",
2172                        cmd);
2173                 break;
2174         }
2175         RETURN(rc);
2176 }
2177
2178 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
2179                             struct list_head *list)
2180 {
2181         return lustre_get_qids(file, inode, type, list);
2182 }
2183
2184 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
2185 {
2186         int rc = 0;
2187         ENTRY;
2188
2189         if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
2190                 CERROR("operate dquot before it's enabled!\n");
2191                 RETURN(-EIO);
2192         }
2193
2194         switch (cmd) {
2195         case QFILE_RD_DQUOT:
2196                 rc = lustre_read_dquot(dquot);
2197                 break;
2198         case QFILE_WR_DQUOT:
2199                 if (dquot->dq_dqb.dqb_ihardlimit ||
2200                     dquot->dq_dqb.dqb_isoftlimit ||
2201                     dquot->dq_dqb.dqb_bhardlimit ||
2202                     dquot->dq_dqb.dqb_bsoftlimit)
2203                         clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2204                 else
2205                         set_bit(DQ_FAKE_B, &dquot->dq_flags);
2206
2207                 rc = lustre_commit_dquot(dquot);
2208                 if (rc >= 0)
2209                         rc = 0;
2210                 break;
2211         default:
2212                 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2213                 LBUG();
2214                 break;
2215         }
2216         RETURN(rc);
2217 }
2218 #endif
2219
2220 static lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2221 {
2222 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
2223         return (EXT3_SB(sb)->journal_bdev);
2224 #else
2225         return kdev_t_to_nr(EXT3_SB(sb)->s_journal->j_dev);
2226 #endif
2227 }
2228
2229 static struct fsfilt_operations fsfilt_ext3_ops = {
2230         .fs_type                = "ext3",
2231         .fs_owner               = THIS_MODULE,
2232         .fs_getlabel            = fsfilt_ext3_get_label,
2233         .fs_setlabel            = fsfilt_ext3_set_label,
2234         .fs_uuid                = fsfilt_ext3_uuid,
2235         .fs_start               = fsfilt_ext3_start,
2236         .fs_brw_start           = fsfilt_ext3_brw_start,
2237         .fs_extend              = fsfilt_ext3_extend,
2238         .fs_commit              = fsfilt_ext3_commit,
2239         .fs_commit_async        = fsfilt_ext3_commit_async,
2240         .fs_commit_wait         = fsfilt_ext3_commit_wait,
2241         .fs_setattr             = fsfilt_ext3_setattr,
2242         .fs_iocontrol           = fsfilt_ext3_iocontrol,
2243         .fs_set_md              = fsfilt_ext3_set_md,
2244         .fs_get_md              = fsfilt_ext3_get_md,
2245         .fs_readpage            = fsfilt_ext3_readpage,
2246         .fs_add_journal_cb      = fsfilt_ext3_add_journal_cb,
2247         .fs_statfs              = fsfilt_ext3_statfs,
2248         .fs_sync                = fsfilt_ext3_sync,
2249         .fs_map_inode_pages     = fsfilt_ext3_map_inode_pages,
2250         .fs_write_record        = fsfilt_ext3_write_record,
2251         .fs_read_record         = fsfilt_ext3_read_record,
2252         .fs_setup               = fsfilt_ext3_setup,
2253         .fs_send_bio            = fsfilt_ext3_send_bio,
2254         .fs_get_op_len          = fsfilt_ext3_get_op_len,
2255         .fs_quotactl            = fsfilt_ext3_quotactl,
2256         .fs_quotacheck          = fsfilt_ext3_quotacheck,
2257 #ifdef HAVE_DISK_INODE_VERSION
2258         .fs_get_version         = fsfilt_ext3_get_version,
2259         .fs_set_version         = fsfilt_ext3_set_version,
2260 #endif
2261 #ifdef HAVE_QUOTA_SUPPORT
2262         .fs_quotainfo           = fsfilt_ext3_quotainfo,
2263         .fs_qids                = fsfilt_ext3_qids,
2264         .fs_dquot               = fsfilt_ext3_dquot,
2265 #endif
2266         .fs_journal_sbdev       = fsfilt_ext3_journal_sbdev,
2267 };
2268
2269 static int __init fsfilt_ext3_init(void)
2270 {
2271         int rc;
2272
2273         fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2274                                          sizeof(struct fsfilt_cb_data), 0, 0);
2275         if (!fcb_cache) {
2276                 CERROR("error allocating fsfilt journal callback cache\n");
2277                 GOTO(out, rc = -ENOMEM);
2278         }
2279
2280         rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2281
2282         if (rc) {
2283                 int err = cfs_mem_cache_destroy(fcb_cache);
2284                 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2285         }
2286 out:
2287         return rc;
2288 }
2289
2290 static void __exit fsfilt_ext3_exit(void)
2291 {
2292         int rc;
2293
2294         fsfilt_unregister_ops(&fsfilt_ext3_ops);
2295         rc = cfs_mem_cache_destroy(fcb_cache);
2296         LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2297 }
2298
2299 module_init(fsfilt_ext3_init);
2300 module_exit(fsfilt_ext3_exit);
2301
2302 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2303 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2304 MODULE_LICENSE("GPL");