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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/lvfs/fsfilt_ext3.c
  37  *
  38  * Author: Andreas Dilger <adilger@clusterfs.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_FILTER
  42
  43 #include <linux/init.h>
  44 #include <linux/module.h>
  45 #include <linux/fs.h>
  46 #include <linux/slab.h>
  47 #include <linux/pagemap.h>
  48 #include <linux/quotaops.h>
  49 #ifdef HAVE_EXT4_LDISKFS
  50 #include <ext4/ext4.h>
  51 #include <ext4/ext4_jbd2.h>
  52 #else
  53 #include <linux/jbd.h>
  54 #include <linux/ext3_fs.h>
  55 #include <linux/ext3_jbd.h>
  56 #endif
  57 #include <linux/version.h>
  58 #include <linux/bitops.h>
  59 #include <linux/quota.h>
  60 #ifdef HAVE_QUOTAIO_V1_H
  61 # include <linux/quotaio_v1.h>
  62 # include <linux/quotaio_v2.h>
  63 #else
  64 # include <quotaio_v1.h>
  65 # include <quotaio_v2.h>
  66 # include <quota_tree.h>
  67 # define V2_DQTREEOFF    QT_TREEOFF
  68 #endif
  69 #include <linux/parser.h>
  70 #if defined(HAVE_EXT3_XATTR_H)
  71 #include <ext3/xattr.h>
  72 #else
  73 /* ext3 xattr.h not available in rh style kernel-devel rpm */
  74 extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
  75 extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
  76 #endif
  77
  78 #include <libcfs/kp30.h>
  79 #include <lustre_fsfilt.h>
  80 #include <obd.h>
  81 #include <lustre_quota.h>
  82 #include <linux/lustre_compat25.h>
  83 #include <linux/lprocfs_status.h>
  84
  85 #ifdef HAVE_EXT4_LDISKFS
  86 #include <ext4/ext4_extents.h>
  87 #else
  88 #include <linux/ext3_extents.h>
  89 #endif
  90
  91 #include "lustre_quota_fmt.h"
  92
  93 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
  94 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS
  95 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS
  96 #else
  97 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS(sb)
  98 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS(sb)
  99 #endif
 100
 101 #ifdef EXT3_SINGLEDATA_TRANS_BLOCKS_HAS_SB
 102 /* for kernels 2.6.18 and later */
 103 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
 104 #else
 105 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS
 106 #endif
 107
 108 #ifdef EXT_INSERT_EXTENT_WITH_5ARGS
 109 #define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
 110                ext3_ext_insert_extent(handle, inode, path, newext, flag)
 111 #else
 112 #define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
 113                ext3_ext_insert_extent(handle, inode, path, newext)
 114 #endif
 115
 116
 117 static cfs_mem_cache_t *fcb_cache;
 118
 119 struct fsfilt_cb_data {
 120         struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
 121         fsfilt_cb_t cb_func;            /* MDS/OBD completion function */
 122         struct obd_device *cb_obd;      /* MDS/OBD completion device */
 123         __u64 cb_last_rcvd;             /* MDS/OST last committed operation */
 124         void *cb_data;                  /* MDS/OST completion function data */
 125 };
 126
 127 #ifndef EXT3_XATTR_INDEX_TRUSTED        /* temporary until we hit l28 kernel */
 128 #define EXT3_XATTR_INDEX_TRUSTED        4
 129 #endif
 130 #ifndef XATTR_NO_CTIME
 131 #define XATTR_NO_CTIME 0x80
 132 #endif
 133
 134 #ifdef HAVE_EXT4_LDISKFS
 135 #define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
 136 #define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
 137 #define fsfilt_journal_callback_set(handle, func, jcb) jbd2_journal_callback_set(handle, func, jcb)
 138 #else
 139 #define fsfilt_log_start_commit(journal, tid) log_start_commit(journal, tid)
 140 #define fsfilt_log_wait_commit(journal, tid) log_wait_commit(journal, tid)
 141 #define fsfilt_journal_callback_set(handle, func, jcb) journal_callback_set(handle, func, jcb)
 142 #define ext_pblock(ex) le32_to_cpu((ex)->ee_start)
 143 #define ext3_ext_store_pblock(ex, pblock)  ((ex)->ee_start = cpu_to_le32(pblock))
 144 #define ext3_inode_bitmap(sb,desc) le32_to_cpu((desc)->bg_inode_bitmap)
 145 #endif
 146
 147 #ifndef ext3_find_next_bit
 148 #define ext3_find_next_bit           ext2_find_next_bit
 149 #endif
 150
 151 #ifndef ext2_find_next_bit
 152 #ifdef __LITTLE_ENDIAN
 153 #define ext2_find_next_bit(addr, size, off) find_next_bit((unsigned long *)(addr), (size), (off))
 154 #else
 155 error "Need implementation of find_next_bit on big-endian systems"
 156 #endif  /* __LITTLE_ENDIAN */
 157 #endif  /* !ext2_find_next_le_bit */
 158
 159 static char *fsfilt_ext3_get_label(struct super_block *sb)
 160 {
 161         return EXT3_SB(sb)->s_es->s_volume_name;
 162 }
 163
 164 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
 165 {
 166         /* see e.g. fsfilt_ext3_write_record() */
 167         journal_t *journal;
 168         handle_t *handle;
 169         int err;
 170
 171         journal = EXT3_SB(sb)->s_journal;
 172         handle = ext3_journal_start_sb(sb, 1);
 173         if (IS_ERR(handle)) {
 174                 CERROR("can't start transaction\n");
 175                 return(PTR_ERR(handle));
 176         }
 177
 178         err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
 179         if (err)
 180                 goto out;
 181
 182         memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
 183                sizeof(EXT3_SB(sb)->s_es->s_volume_name));
 184
 185         err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
 186
 187 out:
 188         ext3_journal_stop(handle);
 189
 190         return(err);
 191 }
 192
 193 static char *fsfilt_ext3_uuid(struct super_block *sb)
 194 {
 195         return EXT3_SB(sb)->s_es->s_uuid;
 196 }
 197
 198 #ifdef HAVE_DISK_INODE_VERSION
 199
 200 static __u64 get_i_version(struct inode *inode)
 201 {
 202 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)) && !defined(USE_I_FS_VERSION)
 203         return inode->i_version;
 204 #else
 205         return EXT3_I(inode)->i_fs_version;
 206 #endif
 207 }
 208
 209 static void set_i_version(struct inode *inode, __u64 new_version)
 210 {
 211 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)) && !defined(USE_I_FS_VERSION)
 212         inode->i_version = new_version;
 213 #else
 214         (EXT3_I(inode))->i_fs_version = new_version;
 215 #endif
 216 }
 217
 218 /*
 219  * Get the 64-bit version for an inode.
 220  */
 221 static __u64 fsfilt_ext3_get_version(struct inode *inode)
 222 {
 223         CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
 224                get_i_version(inode), inode->i_ino);
 225         return get_i_version(inode);
 226 }
 227
 228 /*
 229  * Set the 64-bit version and return the old version.
 230  */
 231 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
 232 {
 233         __u64 old_version = get_i_version(inode);
 234
 235         CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
 236                new_version, old_version, inode->i_ino);
 237         set_i_version(inode, new_version);
 238         /* version is set after all inode operations are finished, so we should
 239          * mark it dirty here */
 240         inode->i_sb->s_op->dirty_inode(inode);
 241         return old_version;
 242 }
 243
 244 #endif
 245
 246 /*
 247  * We don't currently need any additional blocks for rmdir and
 248  * unlink transactions because we are storing the OST oa_id inside
 249  * the inode (which we will be changing anyways as part of this
 250  * transaction).
 251  */
 252 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
 253                                int logs)
 254 {
 255         /* For updates to the last received file */
 256         int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
 257         journal_t *journal;
 258         void *handle;
 259
 260         if (current->journal_info) {
 261                 CDEBUG(D_INODE, "increasing refcount on %p\n",
 262                        current->journal_info);
 263                 goto journal_start;
 264         }
 265
 266         switch(op) {
 267         case FSFILT_OP_RMDIR:
 268         case FSFILT_OP_UNLINK:
 269                 /* delete one file + create/update logs for each stripe */
 270                 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 271                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 272                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 273                 break;
 274         case FSFILT_OP_RENAME:
 275                 /* modify additional directory */
 276                 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
 277                 /* no break */
 278         case FSFILT_OP_SYMLINK:
 279                 /* additional block + block bitmap + GDT for long symlink */
 280                 nblocks += 3;
 281                 /* no break */
 282         case FSFILT_OP_CREATE: {
 283 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL) && !defined(HAVE_EXT4_LDISKFS)
 284                 static int warned;
 285                 if (!warned) {
 286                         if (!test_opt(inode->i_sb, EXTENTS)) {
 287                                 warned = 1;
 288                         } else if (((EXT3_I(inode)->i_flags &
 289                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
 290                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
 291                                 CWARN("extent-mapped directory found with "
 292                                       "ext3-based ldiskfs - contact "
 293                                       "http://bugzilla.lustre.org/\n");
 294                                 warned = 1;
 295                         }
 296                 }
 297 #endif
 298                 /* no break */
 299         }
 300         case FSFILT_OP_MKDIR:
 301         case FSFILT_OP_MKNOD:
 302                 /* modify one inode + block bitmap + GDT */
 303                 nblocks += 3;
 304                 /* no break */
 305         case FSFILT_OP_LINK:
 306                 /* modify parent directory */
 307                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 308                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 309                 /* create/update logs for each stripe */
 310                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 311                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 312                 break;
 313         case FSFILT_OP_SETATTR:
 314                 /* Setattr on inode */
 315                 nblocks += 1;
 316                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 317                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 318                 /* quota chown log for each stripe */
 319                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 320                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
 321                 break;
 322         case FSFILT_OP_CANCEL_UNLINK:
 323                 /* blocks for log header bitmap update OR
 324                  * blocks for catalog header bitmap update + unlink of logs */
 325                 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
 326                         FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
 327                 break;
 328         case FSFILT_OP_JOIN:
 329                 /* delete 2 file(file + array id) + create 1 file (array id)
 330                  * create/update logs for each stripe */
 331                 nblocks += 2 * FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
 332
 333                 /*create array log for head file*/
 334                 nblocks += 3;
 335                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 336                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb));
 337                 /*update head file array */
 338                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
 339                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
 340                 break;
 341         default: CERROR("unknown transaction start op %d\n", op);
 342                 LBUG();
 343         }
 344
 345         LASSERT(current->journal_info == desc_private);
 346         journal = EXT3_SB(inode->i_sb)->s_journal;
 347         if (nblocks > journal->j_max_transaction_buffers) {
 348                 CWARN("too many credits %d for op %ux%u using %d instead\n",
 349                       nblocks, op, logs, journal->j_max_transaction_buffers);
 350                 nblocks = journal->j_max_transaction_buffers;
 351         }
 352
 353  journal_start:
 354         LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
 355         handle = ext3_journal_start(inode, nblocks);
 356
 357         if (!IS_ERR(handle))
 358                 LASSERT(current->journal_info == handle);
 359         else
 360                 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
 361                        op, nblocks, PTR_ERR(handle));
 362         return handle;
 363 }
 364
 365 /*
 366  * Calculate the number of buffer credits needed to write multiple pages in
 367  * a single ext3 transaction.  No, this shouldn't be here, but as yet ext3
 368  * doesn't have a nice API for calculating this sort of thing in advance.
 369  *
 370  * See comment above ext3_writepage_trans_blocks for details.  We assume
 371  * no data journaling is being done, but it does allow for all of the pages
 372  * being non-contiguous.  If we are guaranteed contiguous pages we could
 373  * reduce the number of (d)indirect blocks a lot.
 374  *
 375  * With N blocks per page and P pages, for each inode we have at most:
 376  * N*P indirect
 377  * min(N*P, blocksize/4 + 1) dindirect blocks
 378  * niocount tindirect
 379  *
 380  * For the entire filesystem, we have at most:
 381  * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
 382  * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
 383  * objcount inode blocks
 384  * 1 superblock
 385  * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
 386  *
 387  * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
 388  */
 389 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
 390                                       int niocount, struct niobuf_local *nb)
 391 {
 392         struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
 393         __u64 next_indir;
 394         const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
 395         int nbitmaps = 0, ngdblocks;
 396         int needed = objcount + 1; /* inodes + superblock */
 397         int i, j;
 398
 399         for (i = 0, j = 0; i < objcount; i++, fso++) {
 400                 /* two or more dindirect blocks in case we cross boundary */
 401                 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
 402                                     nb[j].offset) >>
 403                                    sb->s_blocksize_bits) /
 404                         (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
 405                 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
 406
 407                 /* leaf, indirect, tindirect blocks for first block */
 408                 nbitmaps += blockpp + 2;
 409
 410                 j += fso->fso_bufcnt;
 411         }
 412
 413         next_indir = nb[0].offset +
 414                 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
 415         for (i = 1; i < niocount; i++) {
 416                 if (nb[i].offset >= next_indir) {
 417                         nbitmaps++;     /* additional indirect */
 418                         next_indir = nb[i].offset +
 419                                 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
 420                 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
 421                         nbitmaps++;     /* additional indirect */
 422                 }
 423                 nbitmaps += blockpp;    /* each leaf in different group? */
 424         }
 425
 426         ngdblocks = nbitmaps;
 427         if (nbitmaps > EXT3_SB(sb)->s_groups_count)
 428                 nbitmaps = EXT3_SB(sb)->s_groups_count;
 429         if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
 430                 ngdblocks = EXT3_SB(sb)->s_gdb_count;
 431
 432         needed += nbitmaps + ngdblocks;
 433
 434         /* last_rcvd update */
 435         needed += FSFILT_DATA_TRANS_BLOCKS(sb);
 436
 437 #if defined(CONFIG_QUOTA)
 438         /* We assume that there will be 1 bit set in s_dquot.flags for each
 439          * quota file that is active.  This is at least true for now.
 440          */
 441         needed += hweight32(ll_sb_any_quota_active(sb)) *
 442                 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
 443 #endif
 444
 445         return needed;
 446 }
 447
 448 /* We have to start a huge journal transaction here to hold all of the
 449  * metadata for the pages being written here.  This is necessitated by
 450  * the fact that we do lots of prepare_write operations before we do
 451  * any of the matching commit_write operations, so even if we split
 452  * up to use "smaller" transactions none of them could complete until
 453  * all of them were opened.  By having a single journal transaction,
 454  * we eliminate duplicate reservations for common blocks like the
 455  * superblock and group descriptors or bitmaps.
 456  *
 457  * We will start the transaction here, but each prepare_write will
 458  * add a refcount to the transaction, and each commit_write will
 459  * remove a refcount.  The transaction will be closed when all of
 460  * the pages have been written.
 461  */
 462 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
 463                                    int niocount, struct niobuf_local *nb,
 464                                    void *desc_private, int logs)
 465 {
 466         journal_t *journal;
 467         handle_t *handle;
 468         int needed;
 469         ENTRY;
 470
 471         LASSERT(current->journal_info == desc_private);
 472         journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
 473         needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
 474
 475         /* The number of blocks we could _possibly_ dirty can very large.
 476          * We reduce our request if it is absurd (and we couldn't get that
 477          * many credits for a single handle anyways).
 478          *
 479          * At some point we have to limit the size of I/Os sent at one time,
 480          * increase the size of the journal, or we have to calculate the
 481          * actual journal requirements more carefully by checking all of
 482          * the blocks instead of being maximally pessimistic.  It remains to
 483          * be seen if this is a real problem or not.
 484          */
 485         if (needed > journal->j_max_transaction_buffers) {
 486                 CERROR("want too many journal credits (%d) using %d instead\n",
 487                        needed, journal->j_max_transaction_buffers);
 488                 needed = journal->j_max_transaction_buffers;
 489         }
 490
 491         LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
 492         handle = ext3_journal_start(fso->fso_dentry->d_inode, needed);
 493         if (IS_ERR(handle)) {
 494                 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
 495                        PTR_ERR(handle));
 496         } else {
 497                 LASSERT(handle->h_buffer_credits >= needed);
 498                 LASSERT(current->journal_info == handle);
 499         }
 500
 501         RETURN(handle);
 502 }
 503
 504 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
 505 {
 506        handle_t *handle = h;
 507
 508        /* fsfilt_extend called with nblocks = 0 for testing in special cases */
 509        if (nblocks == 0) {
 510                handle->h_buffer_credits = 0;
 511                CWARN("setting credits of handle %p to zero by request\n", h);
 512        }
 513
 514        if (handle->h_buffer_credits > nblocks)
 515                 return 0;
 516        if (ext3_journal_extend(handle, nblocks) == 0)
 517                 return 0;
 518
 519        ext3_mark_inode_dirty(handle, inode);
 520        return ext3_journal_restart(handle, nblocks);
 521 }
 522
 523 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
 524 {
 525         int rc;
 526         handle_t *handle = h;
 527
 528         LASSERT(current->journal_info == handle);
 529         if (force_sync)
 530                 handle->h_sync = 1; /* recovery likes this */
 531
 532         rc = ext3_journal_stop(handle);
 533
 534         return rc;
 535 }
 536
 537 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
 538                                     void **wait_handle)
 539 {
 540         unsigned long tid;
 541         transaction_t *transaction;
 542         handle_t *handle = h;
 543         journal_t *journal;
 544         int rc;
 545
 546         LASSERT(current->journal_info == handle);
 547
 548         transaction = handle->h_transaction;
 549         journal = transaction->t_journal;
 550         tid = transaction->t_tid;
 551         /* we don't want to be blocked */
 552         handle->h_sync = 0;
 553         rc = ext3_journal_stop(handle);
 554         if (rc) {
 555                 CERROR("error while stopping transaction: %d\n", rc);
 556                 return rc;
 557         }
 558         fsfilt_log_start_commit(journal, tid);
 559
 560         *wait_handle = (void *) tid;
 561         CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
 562         return 0;
 563 }
 564
 565 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
 566 {
 567         journal_t *journal = EXT3_JOURNAL(inode);
 568         tid_t tid = (tid_t)(long)h;
 569
 570         CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
 571         if (unlikely(is_journal_aborted(journal)))
 572                 return -EIO;
 573
 574         fsfilt_log_wait_commit(EXT3_JOURNAL(inode), tid);
 575
 576         if (unlikely(is_journal_aborted(journal)))
 577                 return -EIO;
 578         return 0;
 579 }
 580
 581 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
 582                                struct iattr *iattr, int do_trunc)
 583 {
 584         struct inode *inode = dentry->d_inode;
 585         int rc = 0;
 586
 587         LASSERTF(!(iattr->ia_valid & ATTR_SIZE) || !S_ISDIR(inode->i_mode),
 588                  "changing i_size on directory #%lu (%p) new %llu old %llu\n",
 589                  inode->i_ino, inode, (unsigned long long)iattr->ia_size,
 590                  (unsigned long long)i_size_read(inode));
 591
 592         /* Avoid marking the inode dirty on the superblock list unnecessarily.
 593          * We are already writing the inode to disk as part of this
 594          * transaction and want to avoid a lot of extra inode writeout
 595          * later on. b=9828 */
 596         if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
 597                 /* ATTR_SIZE would invoke truncate: clear it */
 598                 iattr->ia_valid &= ~ATTR_SIZE;
 599                 EXT3_I(inode)->i_disksize = iattr->ia_size;
 600                 i_size_write(inode, iattr->ia_size);
 601
 602                 if (iattr->ia_valid & ATTR_UID)
 603                         inode->i_uid = iattr->ia_uid;
 604                 if (iattr->ia_valid & ATTR_GID)
 605                         inode->i_gid = iattr->ia_gid;
 606                 if (iattr->ia_valid & ATTR_ATIME)
 607                         inode->i_atime = iattr->ia_atime;
 608                 if (iattr->ia_valid & ATTR_MTIME)
 609                         inode->i_mtime = iattr->ia_mtime;
 610                 if (iattr->ia_valid & ATTR_CTIME)
 611                         inode->i_ctime = iattr->ia_ctime;
 612                 if (iattr->ia_valid & ATTR_MODE) {
 613                         inode->i_mode = iattr->ia_mode;
 614
 615                         if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 616                                 inode->i_mode &= ~S_ISGID;
 617                 }
 618
 619                 inode->i_sb->s_op->dirty_inode(inode);
 620
 621                 goto out;
 622         }
 623
 624         /* Don't allow setattr to change file type */
 625         if (iattr->ia_valid & ATTR_MODE)
 626                 iattr->ia_mode = (inode->i_mode & S_IFMT) |
 627                                  (iattr->ia_mode & ~S_IFMT);
 628
 629         /* We set these flags on the client, but have already checked perms
 630          * so don't confuse inode_change_ok. */
 631         iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
 632
 633         if (inode->i_op->setattr) {
 634                 rc = inode->i_op->setattr(dentry, iattr);
 635         } else {
 636                 rc = inode_change_ok(inode, iattr);
 637                 if (!rc)
 638                         rc = inode_setattr(inode, iattr);
 639         }
 640
 641  out:
 642         RETURN(rc);
 643 }
 644
 645 static int fsfilt_ext3_iocontrol(struct inode *inode, struct file *file,
 646                                  unsigned int cmd, unsigned long arg)
 647 {
 648         int rc = 0;
 649         ENTRY;
 650
 651         /* FIXME: Can't do this because of nested transaction deadlock */
 652         if (cmd == EXT3_IOC_SETFLAGS) {
 653                 /* We can't enable data journaling on OST objects, because
 654                 * this forces the transaction to be closed in order to
 655                 * flush the journal, but the caller will already have a
 656                 * compound transaction open to update the last_rcvd file,
 657                 * and this thread would deadlock trying to set the flag. */
 658                 if ((*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
 659                         CERROR("can't set data journal flag on file\n");
 660                         RETURN(-EPERM);
 661                 }
 662                 /* Because the MDS does not see the EXTENTS_FL set on the
 663                  * OST objects, mask this flag into all set flags.  It is
 664                  * not legal to clear this flag in any case, so we are not
 665                  * changing the functionality by doing this.  b=22911 */
 666                 *(int *)arg |= EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL;
 667         }
 668
 669 #ifdef HAVE_EXT4_LDISKFS
 670         /* ext4_ioctl does not have a inode argument */
 671         if (inode->i_fop->unlocked_ioctl)
 672                 rc = inode->i_fop->unlocked_ioctl(file, cmd, arg);
 673 #else
 674         if (inode->i_fop->ioctl)
 675                 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
 676 #endif
 677         else
 678                 RETURN(-ENOTTY);
 679
 680         RETURN(rc);
 681 }
 682
 683 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
 684                               void *lmm, int lmm_size, const char *name)
 685 {
 686         int rc;
 687
 688         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 689
 690         rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
 691                                    name, lmm, lmm_size, XATTR_NO_CTIME);
 692
 693         if (rc && rc != -EROFS)
 694                 CERROR("error adding MD data to inode %lu: rc = %d\n",
 695                        inode->i_ino, rc);
 696         return rc;
 697 }
 698
 699 /* Must be called with i_mutex held */
 700 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
 701                               const char *name)
 702 {
 703         int rc;
 704
 705         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
 706
 707         rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
 708                             name, lmm, lmm_size);
 709         /* This gives us the MD size */
 710         if (lmm == NULL)
 711                 return (rc == -ENODATA) ? 0 : rc;
 712
 713         if (rc < 0) {
 714                 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
 715                        EXT3_XATTR_INDEX_TRUSTED, name,
 716                        inode->i_ino, rc);
 717                 memset(lmm, 0, lmm_size);
 718                 return (rc == -ENODATA) ? 0 : rc;
 719         }
 720
 721         return rc;
 722 }
 723
 724 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
 725 {
 726         submit_bio(rw, bio);
 727         return 0;
 728 }
 729
 730 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
 731                                     loff_t *off)
 732 {
 733         struct inode *inode = file->f_dentry->d_inode;
 734         int rc = 0;
 735
 736         if (S_ISREG(inode->i_mode))
 737                 rc = file->f_op->read(file, buf, count, off);
 738         else {
 739                 const int blkbits = inode->i_sb->s_blocksize_bits;
 740                 const int blksize = inode->i_sb->s_blocksize;
 741
 742                 CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
 743                        count, inode->i_ino, *off);
 744                 while (count > 0) {
 745                         struct buffer_head *bh;
 746
 747                         bh = NULL;
 748                         if (*off < i_size_read(inode)) {
 749                                 int err = 0;
 750
 751                                 bh = ext3_bread(NULL, inode, *off >> blkbits,
 752                                                 0, &err);
 753
 754                                 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
 755
 756                                 if (bh) {
 757                                         memcpy(buf, bh->b_data, blksize);
 758                                         brelse(bh);
 759                                 } else if (err) {
 760                                         /* XXX in theory we should just fake
 761                                          * this buffer and continue like ext3,
 762                                          * especially if this is a partial read
 763                                          */
 764                                         CERROR("error read dir %lu+%llu: %d\n",
 765                                                inode->i_ino, *off, err);
 766                                         RETURN(err);
 767                                 }
 768                         }
 769                         if (!bh) {
 770                                 struct ext3_dir_entry_2 *fake = (void *)buf;
 771
 772                                 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
 773                                 memset(fake, 0, sizeof(*fake));
 774                                 fake->rec_len = cpu_to_le16(blksize);
 775                         }
 776                         count -= blksize;
 777                         buf += blksize;
 778                         *off += blksize;
 779                         rc += blksize;
 780                 }
 781         }
 782
 783         return rc;
 784 }
 785
 786 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
 787 {
 788         struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
 789
 790         fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
 791
 792         OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
 793 }
 794
 795 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
 796                                       void *handle, fsfilt_cb_t cb_func,
 797                                       void *cb_data)
 798 {
 799         struct fsfilt_cb_data *fcb;
 800
 801         OBD_SLAB_ALLOC(fcb, fcb_cache, CFS_ALLOC_IO, sizeof *fcb);
 802         if (fcb == NULL)
 803                 RETURN(-ENOMEM);
 804
 805         fcb->cb_func = cb_func;
 806         fcb->cb_obd = obd;
 807         fcb->cb_last_rcvd = last_rcvd;
 808         fcb->cb_data = cb_data;
 809
 810         CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
 811         fsfilt_journal_callback_set(handle, fsfilt_ext3_cb_func,
 812                                     (struct journal_callback *)fcb);
 813
 814         return 0;
 815 }
 816
 817 /*
 818  * We need to hack the return value for the free inode counts because
 819  * the current EA code requires one filesystem block per inode with EAs,
 820  * so it is possible to run out of blocks before we run out of inodes.
 821  *
 822  * This can be removed when the ext3 EA code is fixed.
 823  */
 824 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
 825 {
 826         struct kstatfs sfs;
 827         int rc;
 828
 829         memset(&sfs, 0, sizeof(sfs));
 830         rc = ll_do_statfs(sb,&sfs);
 831
 832         if (!rc && sfs.f_bfree < sfs.f_ffree) {
 833                 sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
 834                 sfs.f_ffree = sfs.f_bfree;
 835         }
 836
 837         statfs_pack(osfs, &sfs);
 838         return rc;
 839 }
 840
 841 static int fsfilt_ext3_sync(struct super_block *sb)
 842 {
 843         return ext3_force_commit(sb);
 844 }
 845
 846 #ifndef EXT3_EXTENTS_FL
 847 #define EXT3_EXTENTS_FL                 0x00080000 /* Inode uses extents */
 848 #endif
 849
 850 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 851 #define fsfilt_up_truncate_sem(inode)  up(&EXT3_I(inode)->truncate_sem);
 852 #define fsfilt_down_truncate_sem(inode)  down(&EXT3_I(inode)->truncate_sem);
 853 #else
 854 #ifdef HAVE_EXT4_LDISKFS
 855 #define fsfilt_up_truncate_sem(inode) up_write((&EXT4_I(inode)->i_data_sem));
 856 #define fsfilt_down_truncate_sem(inode) down_write((&EXT4_I(inode)->i_data_sem));
 857 #else
 858 #define fsfilt_up_truncate_sem(inode)  mutex_unlock(&EXT3_I(inode)->truncate_mutex);
 859 #define fsfilt_down_truncate_sem(inode)  mutex_lock(&EXT3_I(inode)->truncate_mutex);
 860 #endif
 861 #endif
 862
 863 #ifndef EXT_ASSERT
 864 #define EXT_ASSERT(cond)  BUG_ON(!(cond))
 865 #endif
 866
 867 #ifdef EXT3_EXT_HAS_NO_TREE
 868 /* for kernels 2.6.18 and later */
 869 #ifdef HAVE_EXT4_LDISKFS
 870 #define EXT_GENERATION(inode)           (EXT4_I(inode)->i_ext_generation)
 871 #else
 872 #define EXT_GENERATION(inode)           ext_generation(inode)
 873 #endif
 874 #define ext3_ext_base                   inode
 875 #define ext3_ext_base2inode(inode)      (inode)
 876 #define EXT_DEPTH(inode)                ext_depth(inode)
 877 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
 878                         ext3_ext_walk_space(inode, block, num, cb, cbdata);
 879 #else
 880 #define ext3_ext_base                   ext3_extents_tree
 881 #define ext3_ext_base2inode(tree)       (tree->inode)
 882 #define fsfilt_ext3_ext_walk_space(tree, block, num, cb, cbdata) \
 883                         ext3_ext_walk_space(tree, block, num, cb);
 884 #endif
 885
 886 #include <linux/lustre_version.h>
 887
 888 struct bpointers {
 889         unsigned long *blocks;
 890         int *created;
 891         unsigned long start;
 892         int num;
 893         int init_num;
 894         int create;
 895 };
 896
 897 static int ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
 898                               unsigned long block, int *aflags)
 899 {
 900         struct ext3_inode_info *ei = EXT3_I(inode);
 901         unsigned long bg_start;
 902         unsigned long colour;
 903         int depth;
 904
 905         if (path) {
 906                 struct ext3_extent *ex;
 907                 depth = path->p_depth;
 908
 909                 /* try to predict block placement */
 910                 if ((ex = path[depth].p_ext))
 911                         return ext_pblock(ex) + (block - le32_to_cpu(ex->ee_block));
 912
 913                 /* it looks index is empty
 914                  * try to find starting from index itself */
 915                 if (path[depth].p_bh)
 916                         return path[depth].p_bh->b_blocknr;
 917         }
 918
 919         /* OK. use inode's group */
 920         bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
 921                 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
 922         colour = (current->pid % 16) *
 923                 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
 924         return bg_start + colour + block;
 925 }
 926
 927 #define ll_unmap_underlying_metadata(sb, blocknr) \
 928         unmap_underlying_metadata((sb)->s_bdev, blocknr)
 929
 930 #ifndef EXT3_MB_HINT_GROUP_ALLOC
 931 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
 932                                 struct ext3_ext_path *path, unsigned long block,
 933                                 unsigned long *count, int *err)
 934 {
 935         unsigned long pblock, goal;
 936         int aflags = 0;
 937         struct inode *inode = ext3_ext_base2inode(base);
 938
 939         goal = ext3_ext_find_goal(inode, path, block, &aflags);
 940         aflags |= 2; /* block have been already reserved */
 941         pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
 942         return pblock;
 943
 944 }
 945 #else
 946 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
 947                                 struct ext3_ext_path *path, unsigned long block,
 948                                 unsigned long *count, int *err)
 949 {
 950         struct inode *inode = ext3_ext_base2inode(base);
 951         struct ext3_allocation_request ar;
 952         unsigned long pblock;
 953         int aflags;
 954
 955         /* find neighbour allocated blocks */
 956         ar.lleft = block;
 957         *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
 958         if (*err)
 959                 return 0;
 960         ar.lright = block;
 961         *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
 962         if (*err)
 963                 return 0;
 964
 965         /* allocate new block */
 966         ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
 967         ar.inode = inode;
 968         ar.logical = block;
 969         ar.len = *count;
 970         ar.flags = EXT3_MB_HINT_DATA;
 971         pblock = ext3_mb_new_blocks(handle, &ar, err);
 972         *count = ar.len;
 973         return pblock;
 974 }
 975 #endif
 976
 977 #ifdef EXT3_EXT_HAS_NO_TREE
 978 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
 979                                   struct ext3_ext_path *path,
 980                                   struct ext3_ext_cache *cex,
 981 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
 982                                   struct ext3_extent *ex,
 983 #endif
 984                                   void *cbdata)
 985 {
 986         struct bpointers *bp = cbdata;
 987 #else
 988 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
 989                                   struct ext3_ext_path *path,
 990                                   struct ext3_ext_cache *cex
 991 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
 992                                   , struct ext3_extent *ex
 993 #endif
 994                                  )
 995 {
 996         struct bpointers *bp = base->private;
 997 #endif
 998         struct inode *inode = ext3_ext_base2inode(base);
 999         struct ext3_extent nex;
1000         unsigned long pblock;
1001         unsigned long tgen;
1002         int err, i;
1003         unsigned long count;
1004         handle_t *handle;
1005
1006         i = EXT_DEPTH(base);
1007         EXT_ASSERT(i == path->p_depth);
1008         EXT_ASSERT(path[i].p_hdr);
1009
1010         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1011                 err = EXT_CONTINUE;
1012                 goto map;
1013         }
1014
1015         if (bp->create == 0) {
1016                 i = 0;
1017                 if (cex->ec_block < bp->start)
1018                         i = bp->start - cex->ec_block;
1019                 if (i >= cex->ec_len)
1020                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1021                                         i, cex->ec_len);
1022                 for (; i < cex->ec_len && bp->num; i++) {
1023                         *(bp->created) = 0;
1024                         bp->created++;
1025                         *(bp->blocks) = 0;
1026                         bp->blocks++;
1027                         bp->num--;
1028                         bp->start++;
1029                 }
1030
1031                 return EXT_CONTINUE;
1032         }
1033
1034         tgen = EXT_GENERATION(base);
1035         count = ext3_ext_calc_credits_for_insert(base, path);
1036         fsfilt_up_truncate_sem(inode);
1037         handle = ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
1038         if (IS_ERR(handle)) {
1039                 fsfilt_down_truncate_sem(inode);
1040                 return PTR_ERR(handle);
1041         }
1042
1043         fsfilt_down_truncate_sem(inode);
1044         if (tgen != EXT_GENERATION(base)) {
1045                 /* the tree has changed. so path can be invalid at moment */
1046                 ext3_journal_stop(handle);
1047                 return EXT_REPEAT;
1048         }
1049
1050         count = cex->ec_len;
1051         pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
1052         if (!pblock)
1053                 goto out;
1054         EXT_ASSERT(count <= cex->ec_len);
1055
1056         /* insert new extent */
1057         nex.ee_block = cpu_to_le32(cex->ec_block);
1058         ext3_ext_store_pblock(&nex, pblock);
1059         nex.ee_len = cpu_to_le16(count);
1060         err = fsfilt_ext3_ext_insert_extent(handle, base, path, &nex, 0);
1061         if (err) {
1062                 /* free data blocks we just allocated */
1063                 /* not a good idea to call discard here directly,
1064                  * but otherwise we'd need to call it every free() */
1065 #ifdef EXT3_MB_HINT_GROUP_ALLOC
1066                 ext3_mb_discard_inode_preallocations(inode);
1067 #endif
1068                 ext3_free_blocks(handle, inode, ext_pblock(&nex),
1069                                  cpu_to_le16(nex.ee_len), 0);
1070                 goto out;
1071         }
1072
1073         /*
1074          * Putting len of the actual extent we just inserted,
1075          * we are asking ext3_ext_walk_space() to continue
1076          * scaning after that block
1077          */
1078         cex->ec_len = le16_to_cpu(nex.ee_len);
1079         cex->ec_start = ext_pblock(&nex);
1080         BUG_ON(le16_to_cpu(nex.ee_len) == 0);
1081         BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
1082
1083 out:
1084         ext3_journal_stop(handle);
1085 map:
1086         if (err >= 0) {
1087                 /* map blocks */
1088                 if (bp->num == 0) {
1089                         CERROR("hmm. why do we find this extent?\n");
1090                         CERROR("initial space: %lu:%u\n",
1091                                 bp->start, bp->init_num);
1092                         CERROR("current extent: %u/%u/%llu %d\n",
1093                                 cex->ec_block, cex->ec_len,
1094                                 (unsigned long long)cex->ec_start,
1095                                 cex->ec_type);
1096                 }
1097                 i = 0;
1098                 if (cex->ec_block < bp->start)
1099                         i = bp->start - cex->ec_block;
1100                 if (i >= cex->ec_len)
1101                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1102                                         i, cex->ec_len);
1103                 for (; i < cex->ec_len && bp->num; i++) {
1104                         *(bp->blocks) = cex->ec_start + i;
1105                         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1106                                 *(bp->created) = 0;
1107                         } else {
1108                                 *(bp->created) = 1;
1109                                 /* unmap any possible underlying metadata from
1110                                  * the block device mapping.  bug 6998. */
1111                                 ll_unmap_underlying_metadata(inode->i_sb,
1112                                                              *(bp->blocks));
1113                         }
1114                         bp->created++;
1115                         bp->blocks++;
1116                         bp->num--;
1117                         bp->start++;
1118                 }
1119         }
1120         return err;
1121 }
1122
1123 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1124                        unsigned long num, unsigned long *blocks,
1125                        int *created, int create)
1126 {
1127 #ifdef EXT3_EXT_HAS_NO_TREE
1128         struct ext3_ext_base *base = inode;
1129 #else
1130         struct ext3_extents_tree tree;
1131         struct ext3_ext_base *base = &tree;
1132 #endif
1133         struct bpointers bp;
1134         int err;
1135
1136         CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1137                block, block + num - 1, (unsigned) inode->i_ino);
1138
1139 #ifndef EXT3_EXT_HAS_NO_TREE
1140         ext3_init_tree_desc(base, inode);
1141         tree.private = &bp;
1142 #endif
1143         bp.blocks = blocks;
1144         bp.created = created;
1145         bp.start = block;
1146         bp.init_num = bp.num = num;
1147         bp.create = create;
1148
1149 #if !defined(WALK_SPACE_HAS_DATA_SEM) || !defined(HAVE_EXT4_LDISKFS)
1150         fsfilt_down_truncate_sem(inode);
1151 #endif
1152         err = fsfilt_ext3_ext_walk_space(base, block, num, ext3_ext_new_extent_cb, &bp);
1153         ext3_ext_invalidate_cache(base);
1154 #if !defined(WALK_SPACE_HAS_DATA_SEM) || !defined(HAVE_EXT4_LDISKFS)
1155         fsfilt_up_truncate_sem(inode);
1156 #endif
1157
1158         return err;
1159 }
1160
1161 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1162                                     int pages, unsigned long *blocks,
1163                                     int *created, int create)
1164 {
1165         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1166         int rc = 0, i = 0;
1167         struct page *fp = NULL;
1168         int clen = 0;
1169
1170         CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1171                 inode->i_ino, pages, (*page)->index);
1172
1173         /* pages are sorted already. so, we just have to find
1174          * contig. space and process them properly */
1175         while (i < pages) {
1176                 if (fp == NULL) {
1177                         /* start new extent */
1178                         fp = *page++;
1179                         clen = 1;
1180                         i++;
1181                         continue;
1182                 } else if (fp->index + clen == (*page)->index) {
1183                         /* continue the extent */
1184                         page++;
1185                         clen++;
1186                         i++;
1187                         continue;
1188                 }
1189
1190                 /* process found extent */
1191                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1192                                         clen * blocks_per_page, blocks,
1193                                         created, create);
1194                 if (rc)
1195                         GOTO(cleanup, rc);
1196
1197                 /* look for next extent */
1198                 fp = NULL;
1199                 blocks += blocks_per_page * clen;
1200                 created += blocks_per_page * clen;
1201         }
1202
1203         if (fp)
1204                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1205                                         clen * blocks_per_page, blocks,
1206                                         created, create);
1207 cleanup:
1208         return rc;
1209 }
1210
1211 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1212                                unsigned long *blocks, int *created, int create);
1213 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1214                                    int pages, unsigned long *blocks,
1215                                    int *created, int create)
1216 {
1217         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1218         unsigned long *b;
1219         int rc = 0, i, *cr;
1220
1221         for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1222                 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1223                 if (rc) {
1224                         CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1225                                inode->i_ino, *b, *cr, create, rc);
1226                         break;
1227                 }
1228
1229                 b += blocks_per_page;
1230                 cr += blocks_per_page;
1231         }
1232         return rc;
1233 }
1234
1235 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1236                                 int pages, unsigned long *blocks,
1237                                 int *created, int create,
1238                                 struct semaphore *optional_sem)
1239 {
1240         int rc;
1241
1242         if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1243                 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1244                                                      blocks, created, create);
1245                 return rc;
1246         }
1247         if (optional_sem != NULL)
1248                 down(optional_sem);
1249         rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1250                                             created, create);
1251         if (optional_sem != NULL)
1252                 up(optional_sem);
1253
1254         return rc;
1255 }
1256
1257 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1258                                    int size, loff_t *offs)
1259 {
1260         struct inode *inode = file->f_dentry->d_inode;
1261         unsigned long block;
1262         struct buffer_head *bh;
1263         int err, blocksize, csize, boffs;
1264
1265         /* prevent reading after eof */
1266         lock_kernel();
1267         if (i_size_read(inode) < *offs + size) {
1268                 size = i_size_read(inode) - *offs;
1269                 unlock_kernel();
1270                 if (size < 0) {
1271                         CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
1272                                i_size_read(inode), *offs);
1273                         return -EBADR;
1274                 } else if (size == 0) {
1275                         return 0;
1276                 }
1277         } else {
1278                 unlock_kernel();
1279         }
1280
1281         blocksize = 1 << inode->i_blkbits;
1282
1283         while (size > 0) {
1284                 block = *offs >> inode->i_blkbits;
1285                 boffs = *offs & (blocksize - 1);
1286                 csize = min(blocksize - boffs, size);
1287                 bh = ext3_bread(NULL, inode, block, 0, &err);
1288                 if (!bh) {
1289                         CERROR("can't read block: %d\n", err);
1290                         return err;
1291                 }
1292
1293                 memcpy(buf, bh->b_data + boffs, csize);
1294                 brelse(bh);
1295
1296                 *offs += csize;
1297                 buf += csize;
1298                 size -= csize;
1299         }
1300         return 0;
1301 }
1302
1303 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1304                                     loff_t *offs, int force_sync)
1305 {
1306         struct buffer_head *bh = NULL;
1307         unsigned long block;
1308         struct inode *inode = file->f_dentry->d_inode;
1309         loff_t old_size = i_size_read(inode), offset = *offs;
1310         loff_t new_size = i_size_read(inode);
1311         handle_t *handle;
1312         int err = 0, block_count = 0, blocksize, size, boffs;
1313
1314         /* Determine how many transaction credits are needed */
1315         blocksize = 1 << inode->i_blkbits;
1316         block_count = (*offs & (blocksize - 1)) + bufsize;
1317         block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1318
1319         handle = ext3_journal_start(inode,
1320                                block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1321         if (IS_ERR(handle)) {
1322                 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1323                        block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1324                 return PTR_ERR(handle);
1325         }
1326
1327         while (bufsize > 0) {
1328                 if (bh != NULL)
1329                         brelse(bh);
1330
1331                 block = offset >> inode->i_blkbits;
1332                 boffs = offset & (blocksize - 1);
1333                 size = min(blocksize - boffs, bufsize);
1334                 bh = ext3_bread(handle, inode, block, 1, &err);
1335                 if (!bh) {
1336                         CERROR("can't read/create block: %d\n", err);
1337                         goto out;
1338                 }
1339
1340                 err = ext3_journal_get_write_access(handle, bh);
1341                 if (err) {
1342                         CERROR("journal_get_write_access() returned error %d\n",
1343                                err);
1344                         goto out;
1345                 }
1346                 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1347                 memcpy(bh->b_data + boffs, buf, size);
1348                 err = ext3_journal_dirty_metadata(handle, bh);
1349                 if (err) {
1350                         CERROR("journal_dirty_metadata() returned error %d\n",
1351                                err);
1352                         goto out;
1353                 }
1354                 if (offset + size > new_size)
1355                         new_size = offset + size;
1356                 offset += size;
1357                 bufsize -= size;
1358                 buf += size;
1359         }
1360
1361         if (force_sync)
1362                 handle->h_sync = 1; /* recovery likes this */
1363 out:
1364         if (bh)
1365                 brelse(bh);
1366
1367         /* correct in-core and on-disk sizes */
1368         if (new_size > i_size_read(inode)) {
1369                 lock_kernel();
1370                 if (new_size > i_size_read(inode))
1371                         i_size_write(inode, new_size);
1372                 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1373                         EXT3_I(inode)->i_disksize = i_size_read(inode);
1374                 if (i_size_read(inode) > old_size)
1375                         mark_inode_dirty(inode);
1376                 unlock_kernel();
1377         }
1378
1379         ext3_journal_stop(handle);
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 #if !defined(S_PDIROPS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,6)) && defined(HAVE_QUOTA_SUPPORT)
1389         struct ext3_sb_info *sbi = EXT3_SB(sb);
1390 #endif
1391 #if 0
1392         sbi->dx_lock = fsfilt_ext3_dx_lock;
1393         sbi->dx_unlock = fsfilt_ext3_dx_unlock;
1394 #endif
1395 #ifdef S_PDIROPS
1396         CWARN("Enabling PDIROPS\n");
1397         set_opt(sbi->s_mount_opt, PDIROPS);
1398         sb->s_flags |= S_PDIROPS;
1399 #endif
1400         if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1401                 CWARN("filesystem doesn't have dir_index feature enabled\n");
1402 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,6)) && defined(HAVE_QUOTA_SUPPORT)
1403         /* enable journaled quota support */
1404         /* kfreed in ext3_put_super() */
1405         sbi->s_qf_names[USRQUOTA] = kstrdup("lquota.user.reserved", GFP_KERNEL);
1406         if (!sbi->s_qf_names[USRQUOTA])
1407                 return -ENOMEM;
1408         sbi->s_qf_names[GRPQUOTA] = kstrdup("lquota.group.reserved", GFP_KERNEL);
1409         if (!sbi->s_qf_names[GRPQUOTA]) {
1410                 kfree(sbi->s_qf_names[USRQUOTA]);
1411                 sbi->s_qf_names[USRQUOTA] = NULL;
1412                 return -ENOMEM;
1413         }
1414         sbi->s_jquota_fmt = QFMT_VFS_V0;
1415 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
1416         set_opt(sbi->s_mount_opt, QUOTA);
1417 #endif
1418 #endif
1419         return 0;
1420 }
1421
1422 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1423    objects. Logs is number of logfiles to update */
1424 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1425 {
1426         if ( !fso ) {
1427                 switch(op) {
1428                 case FSFILT_OP_CREATE:
1429                                  /* directory leaf, index & indirect & EA*/
1430                         return 4 + 3 * logs;
1431                 case FSFILT_OP_UNLINK:
1432                         return 3 * logs;
1433                 }
1434         } else {
1435                 int i;
1436                 int needed = 0;
1437                 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1438                 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1439                 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1440                 for (i = 0; i < op; i++, fso++) {
1441                         int nblocks = fso->fso_bufcnt * blockpp;
1442                         int ndindirect = min(nblocks, addrpp + 1);
1443                         int nindir = nblocks + ndindirect + 1;
1444
1445                         needed += nindir;
1446                 }
1447                 return needed + 3 * logs;
1448         }
1449
1450         return 0;
1451 }
1452
1453 #ifdef HAVE_QUOTA_SUPPORT
1454 #define DQINFO_COPY(out, in)                    \
1455 do {                                            \
1456         Q_COPY(out, in, dqi_bgrace);            \
1457         Q_COPY(out, in, dqi_igrace);            \
1458         Q_COPY(out, in, dqi_flags);             \
1459         Q_COPY(out, in, dqi_valid);             \
1460 } while (0)
1461
1462 #define DQBLK_COPY(out, in)                     \
1463 do {                                            \
1464         Q_COPY(out, in, dqb_bhardlimit);        \
1465         Q_COPY(out, in, dqb_bsoftlimit);        \
1466         Q_COPY(out, in, dqb_curspace);          \
1467         Q_COPY(out, in, dqb_ihardlimit);        \
1468         Q_COPY(out, in, dqb_isoftlimit);        \
1469         Q_COPY(out, in, dqb_curinodes);         \
1470         Q_COPY(out, in, dqb_btime);             \
1471         Q_COPY(out, in, dqb_itime);             \
1472         Q_COPY(out, in, dqb_valid);             \
1473 } while (0)
1474
1475
1476
1477 static int fsfilt_ext3_quotactl(struct super_block *sb,
1478                                 struct obd_quotactl *oqc)
1479 {
1480         int i, rc = 0, error = 0;
1481         struct quotactl_ops *qcop;
1482         struct if_dqinfo *info;
1483         struct if_dqblk *dqblk;
1484         ENTRY;
1485
1486         if (!sb->s_qcop)
1487                 RETURN(-ENOSYS);
1488
1489         OBD_ALLOC_PTR(info);
1490         if (!info)
1491                 RETURN(-ENOMEM);
1492         OBD_ALLOC_PTR(dqblk);
1493         if (!dqblk) {
1494                 OBD_FREE_PTR(info);
1495                 RETURN(-ENOMEM);
1496         }
1497
1498         DQINFO_COPY(info, &oqc->qc_dqinfo);
1499         DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1500
1501         qcop = sb->s_qcop;
1502         if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1503                 for (i = 0; i < MAXQUOTAS; i++) {
1504                         if (!Q_TYPESET(oqc, i))
1505                                 continue;
1506
1507                         if (oqc->qc_cmd == Q_QUOTAON) {
1508                                 lustre_quota_version_t qfmt = oqc->qc_id;
1509                                 char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1510
1511                                 rc = ll_quota_on(sb, i, QFMT_VFS_V0,
1512                                                  name[qfmt][i], 0);
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 = ll_quota_on(sb, i,
1519                                                               QFMT_VFS_V0,
1520                                                               name[qfmt][i], 0);
1521                                         else if (rc == -ESTALE)
1522                                                 rc = -ENOENT;
1523                                 }
1524 #endif
1525                         } else if (oqc->qc_cmd == Q_QUOTAOFF)
1526                                 rc = ll_quota_off(sb, i, 0);
1527
1528                         if (rc == -EBUSY)
1529                                 error = rc;
1530                         else if (rc)
1531                                 GOTO(out, rc);
1532                 }
1533                 GOTO(out, rc ?: error);
1534         }
1535
1536         switch (oqc->qc_cmd) {
1537         case Q_GETOINFO:
1538         case Q_GETINFO:
1539                 if (!qcop->get_info)
1540                         GOTO(out, rc = -ENOSYS);
1541                 rc = qcop->get_info(sb, oqc->qc_type, info);
1542                 break;
1543         case Q_SETQUOTA:
1544         case Q_INITQUOTA:
1545                 if (!qcop->set_dqblk)
1546                         GOTO(out, rc = -ENOSYS);
1547                 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1548                 break;
1549         case Q_GETOQUOTA:
1550         case Q_GETQUOTA:
1551                 if (!qcop->get_dqblk)
1552                         GOTO(out, rc = -ENOSYS);
1553                 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1554                 if (!rc)
1555                         dqblk->dqb_valid = QIF_LIMITS | QIF_USAGE;
1556                 break;
1557         case Q_SYNC:
1558                 if (!sb->s_qcop->quota_sync)
1559                         GOTO(out, rc = -ENOSYS);
1560                 qcop->quota_sync(sb, oqc->qc_type);
1561                 break;
1562         case Q_FINVALIDATE:
1563                 CDEBUG(D_WARNING, "invalidating operational quota files\n");
1564                 for (i = 0; i < MAXQUOTAS; i++) {
1565                         struct file *fp;
1566                         lustre_quota_version_t qfmt = oqc->qc_id;
1567                         char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1568
1569                         if (!Q_TYPESET(oqc, i))
1570                                 continue;
1571
1572                         fp = filp_open(name[qfmt][i], O_CREAT | O_TRUNC | O_RDWR, 0644);
1573                         if (IS_ERR(fp)) {
1574                                 rc = PTR_ERR(fp);
1575                                 CERROR("error invalidating operational quota file"
1576                                        " %s (rc:%d)\n", name[qfmt][i], rc);
1577                         } else {
1578                                 filp_close(fp, 0);
1579                         }
1580
1581                 }
1582                 break;
1583         default:
1584                 CERROR("unsupported quotactl command: %d\n", oqc->qc_cmd);
1585                 LBUG();
1586         }
1587 out:
1588         DQINFO_COPY(&oqc->qc_dqinfo, info);
1589         DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1590
1591         OBD_FREE_PTR(info);
1592         OBD_FREE_PTR(dqblk);
1593
1594         if (rc)
1595                 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %d "
1596                                 "failed: %d\n",
1597                        oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1598         RETURN(rc);
1599 }
1600
1601 struct chk_dqblk{
1602         struct hlist_node       dqb_hash;        /* quotacheck hash */
1603         struct list_head        dqb_list;        /* in list also */
1604         qid_t                   dqb_id;          /* uid/gid */
1605         short                   dqb_type;        /* USRQUOTA/GRPQUOTA */
1606         qsize_t                 dqb_bhardlimit;  /* block hard limit */
1607         qsize_t                 dqb_bsoftlimit;  /* block soft limit */
1608         qsize_t                 dqb_curspace;    /* current space */
1609         qsize_t                 dqb_ihardlimit;  /* inode hard limit */
1610         qsize_t                 dqb_isoftlimit;  /* inode soft limit */
1611         qsize_t                 dqb_curinodes;   /* current inodes */
1612         __u64                   dqb_btime;       /* block grace time */
1613         __u64                   dqb_itime;       /* inode grace time */
1614         __u32                   dqb_valid;       /* flag for above fields */
1615 };
1616
1617 static inline unsigned int chkquot_hash(qid_t id, int type)
1618                                         __attribute__((__const__));
1619
1620 static inline unsigned int chkquot_hash(qid_t id, int type)
1621 {
1622         return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1623 }
1624
1625 static inline struct chk_dqblk *
1626 find_chkquot(struct hlist_head *head, qid_t id, int type)
1627 {
1628         struct hlist_node *node;
1629         struct chk_dqblk *cdqb;
1630
1631         hlist_for_each(node, head) {
1632                 cdqb = hlist_entry(node, struct chk_dqblk, dqb_hash);
1633                 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1634                         return cdqb;
1635         }
1636
1637         return NULL;
1638 }
1639
1640 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1641 {
1642         struct chk_dqblk *cdqb;
1643
1644         OBD_ALLOC_PTR(cdqb);
1645         if (cdqb) {
1646                 INIT_HLIST_NODE(&cdqb->dqb_hash);
1647                 INIT_LIST_HEAD(&cdqb->dqb_list);
1648                 cdqb->dqb_id = id;
1649                 cdqb->dqb_type = type;
1650         }
1651
1652         return cdqb;
1653 }
1654
1655 static struct chk_dqblk *
1656 cqget(struct super_block *sb, struct hlist_head *hash, struct list_head *list,
1657       qid_t id, int type, int first_check)
1658 {
1659         struct hlist_head *head = hash + chkquot_hash(id, type);
1660         struct if_dqblk dqb;
1661         struct chk_dqblk *cdqb;
1662         int rc;
1663
1664         cdqb = find_chkquot(head, id, type);
1665         if (cdqb)
1666                 return cdqb;
1667
1668         cdqb = alloc_chkquot(id, type);
1669         if (!cdqb)
1670                 return NULL;
1671
1672         if (!first_check) {
1673                 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1674                 if (rc) {
1675                         CERROR("get_dqblk of id %u, type %d failed: %d\n",
1676                                id, type, rc);
1677                 } else {
1678                         DQBLK_COPY(cdqb, &dqb);
1679                         cdqb->dqb_curspace = 0;
1680                         cdqb->dqb_curinodes = 0;
1681                 }
1682         }
1683
1684         hlist_add_head(&cdqb->dqb_hash, head);
1685         list_add_tail(&cdqb->dqb_list, list);
1686
1687         return cdqb;
1688 }
1689
1690 static inline int quota_onoff(struct super_block *sb, int cmd, int type, int qfmt)
1691 {
1692         struct obd_quotactl *oqctl;
1693         int rc;
1694
1695         OBD_ALLOC_PTR(oqctl);
1696         if (!oqctl)
1697                 RETURN(-ENOMEM);
1698
1699         oqctl->qc_cmd = cmd;
1700         oqctl->qc_id = qfmt;
1701         oqctl->qc_type = type;
1702         rc = fsfilt_ext3_quotactl(sb, oqctl);
1703
1704         OBD_FREE_PTR(oqctl);
1705         return rc;
1706 }
1707
1708 static inline int read_old_dqinfo(struct super_block *sb, int type,
1709                                   struct if_dqinfo *dqinfo)
1710 {
1711         struct obd_quotactl *oqctl;
1712         int rc;
1713         ENTRY;
1714
1715         OBD_ALLOC_PTR(oqctl);
1716         if (!oqctl)
1717                 RETURN(-ENOMEM);
1718
1719         oqctl->qc_cmd = Q_GETINFO;
1720         oqctl->qc_type = type;
1721         rc = fsfilt_ext3_quotactl(sb, oqctl);
1722         if (!rc)
1723                 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1724
1725         OBD_FREE_PTR(oqctl);
1726         RETURN(rc);
1727 }
1728
1729 #ifndef HAVE_EXT4_LDISKFS
1730 static inline struct ext3_group_desc *
1731 get_group_desc(struct super_block *sb, int group, struct buffer_head **bh)
1732 {
1733         unsigned long desc_block, desc;
1734         struct ext3_group_desc *gdp;
1735
1736         desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1737         desc = group % EXT3_DESC_PER_BLOCK(sb);
1738         gdp = (struct ext3_group_desc *)
1739               EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1740
1741         return gdp + desc;
1742 }
1743
1744 static inline struct buffer_head *
1745 ext3_read_inode_bitmap(struct super_block *sb, unsigned long group)
1746 {
1747         struct ext3_group_desc *desc;
1748         struct buffer_head *bh;
1749
1750         desc = get_group_desc(sb, group, NULL);
1751         bh = sb_bread(sb, ext3_inode_bitmap(sb, desc));
1752         return bh;
1753 }
1754
1755 static __u32 ext3_itable_unused_count(struct super_block *sb,
1756                                struct ext3_group_desc *bg) {
1757        return le16_to_cpu(bg->bg_itable_unused);
1758 }
1759 #else
1760 #define get_group_desc ext3_get_group_desc
1761 #endif
1762
1763 struct qchk_ctxt {
1764         struct hlist_head       qckt_hash[NR_DQHASH];        /* quotacheck hash */
1765         struct list_head        qckt_list;                   /* quotacheck list */
1766         int                     qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1767         struct if_dqinfo        qckt_dqinfo[MAXQUOTAS];      /* old dqinfo */
1768 };
1769
1770 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1771                            struct obd_quotactl *oqc)
1772 {
1773         struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1774         loff_t size = 0;
1775         qid_t qid[MAXQUOTAS];
1776         int cnt, i, rc = 0;
1777
1778         if (!inode)
1779                 return 0;
1780
1781         qid[USRQUOTA] = inode->i_uid;
1782         qid[GRPQUOTA] = inode->i_gid;
1783
1784         if (S_ISDIR(inode->i_mode) ||
1785             S_ISREG(inode->i_mode) ||
1786             S_ISLNK(inode->i_mode))
1787                 size = inode_get_bytes(inode);
1788
1789         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1790                 if (!Q_TYPESET(oqc, cnt))
1791                         continue;
1792
1793                 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1794                                 &qctxt->qckt_list, qid[cnt], cnt,
1795                                 qctxt->qckt_first_check[cnt]);
1796                 if (!cdqb[cnt]) {
1797                         rc = -ENOMEM;
1798                         break;
1799                 }
1800
1801                 cdqb[cnt]->dqb_curspace += size;
1802                 cdqb[cnt]->dqb_curinodes++;
1803         }
1804
1805         if (rc) {
1806                 for (i = 0; i < cnt; i++) {
1807                         if (!Q_TYPESET(oqc, i))
1808                                 continue;
1809                         LASSERT(cdqb[i]);
1810                         cdqb[i]->dqb_curspace -= size;
1811                         cdqb[i]->dqb_curinodes--;
1812                 }
1813         }
1814
1815         return rc;
1816 }
1817
1818 static int v2_write_dqheader(struct file *f, int type)
1819 {
1820         static const __u32 quota_magics[] = V2_INITQMAGICS;
1821         static const __u32 quota_versions[] = LUSTRE_INITQVERSIONS_V1;
1822         struct v2_disk_dqheader dqhead;
1823         loff_t offset = 0;
1824
1825         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1826         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1827
1828         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1829         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1830
1831         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1832 }
1833
1834 /* write dqinfo struct in a new quota file */
1835 static int v2_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1836 {
1837         struct v2_disk_dqinfo dqinfo;
1838         __u32 blocks = V2_DQTREEOFF + 1;
1839         loff_t offset = V2_DQINFOOFF;
1840
1841         if (info) {
1842                 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1843                 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1844                 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1845                                                ~DQF_INFO_DIRTY);
1846         } else {
1847                 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1848                 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1849                 dqinfo.dqi_flags = 0;
1850         }
1851
1852         dqinfo.dqi_blocks = cpu_to_le32(blocks);
1853         dqinfo.dqi_free_blk = 0;
1854         dqinfo.dqi_free_entry = 0;
1855
1856         return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1857 }
1858
1859 #ifdef HAVE_QUOTA64
1860 static int v3_write_dqheader(struct file *f, int type)
1861 {
1862         static const __u32 quota_magics[] = V2_INITQMAGICS;
1863         static const __u32 quota_versions[] = LUSTRE_INITQVERSIONS_V2;
1864         struct v2_disk_dqheader dqhead;
1865         loff_t offset = 0;
1866
1867         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1868         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1869
1870         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1871         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1872
1873         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1874 }
1875
1876 /* write dqinfo struct in a new quota file */
1877 static int v3_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1878 {
1879         return v2_write_dqinfo(f, type, info);
1880 }
1881 #endif
1882
1883 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1884                                   struct obd_quotactl *oqc)
1885 {
1886         int i, rc = 0;
1887         ENTRY;
1888
1889         for (i = 0; i < MAXQUOTAS; i++) {
1890                 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1891                                          NULL : &qctxt->qckt_dqinfo[i];
1892                 struct file *file;
1893                 const char *name[][MAXQUOTAS] = LUSTRE_OPQFILES_NAMES;
1894                 int (*write_dqheader)(struct file *, int);
1895                 int (*write_dqinfo)(struct file *, int, struct if_dqinfo *);
1896
1897                 if (!Q_TYPESET(oqc, i))
1898                         continue;
1899
1900                 file = filp_open(name[oqc->qc_id][i],
1901                                  O_RDWR | O_CREAT | O_TRUNC, 0644);
1902                 if (IS_ERR(file)) {
1903                         rc = PTR_ERR(file);
1904                         CERROR("can't create %s file: rc = %d\n",
1905                                name[oqc->qc_id][i], rc);
1906                         GOTO(out, rc);
1907                 }
1908
1909                 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1910                         CERROR("file %s is not regular", name[oqc->qc_id][i]);
1911                         filp_close(file, 0);
1912                         GOTO(out, rc = -EINVAL);
1913                 }
1914
1915                 DQUOT_DROP(file->f_dentry->d_inode);
1916
1917                 switch (oqc->qc_id) {
1918                 case LUSTRE_QUOTA_V1 : write_dqheader = v2_write_dqheader;
1919                                        write_dqinfo   = v2_write_dqinfo;
1920                                        break;
1921 #ifdef HAVE_QUOTA64
1922                 case LUSTRE_QUOTA_V2 : write_dqheader = v3_write_dqheader;
1923                                        write_dqinfo   = v3_write_dqinfo;
1924                                        break;
1925 #endif
1926                 default              : CERROR("unknown quota format!\n");
1927                                        LBUG();
1928                 }
1929
1930                 rc = (*write_dqheader)(file, i);
1931                 if (rc) {
1932                         filp_close(file, 0);
1933                         GOTO(out, rc);
1934                 }
1935
1936                 rc = (*write_dqinfo)(file, i, info);
1937                 filp_close(file, 0);
1938                 if (rc)
1939                         GOTO(out, rc);
1940         }
1941
1942 out:
1943         RETURN(rc);
1944 }
1945
1946
1947 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1948                           struct chk_dqblk *cdqb)
1949 {
1950         struct obd_quotactl *oqc;
1951         long now;
1952         int rc;
1953         ENTRY;
1954
1955         OBD_ALLOC_PTR(oqc);
1956         if (!oqc)
1957                 RETURN(-ENOMEM);
1958
1959         now = CURRENT_SECONDS;
1960
1961         if (cdqb->dqb_bsoftlimit &&
1962             toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1963             !cdqb->dqb_btime)
1964                 cdqb->dqb_btime =
1965                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1966
1967         if (cdqb->dqb_isoftlimit &&
1968             cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1969             !cdqb->dqb_itime)
1970                 cdqb->dqb_itime =
1971                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1972
1973         cdqb->dqb_valid = QIF_ALL;
1974
1975         oqc->qc_cmd = Q_SETQUOTA;
1976         oqc->qc_type = cdqb->dqb_type;
1977         oqc->qc_id = cdqb->dqb_id;
1978         DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1979
1980         rc = fsfilt_ext3_quotactl(sb, oqc);
1981         OBD_FREE_PTR(oqc);
1982         RETURN(rc);
1983 }
1984
1985 static int prune_chkquots(struct super_block *sb,
1986                           struct qchk_ctxt *qctxt, int error)
1987 {
1988         struct chk_dqblk *cdqb, *tmp;
1989         int rc;
1990
1991         list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1992                 if (!error) {
1993                         rc = commit_chkquot(sb, qctxt, cdqb);
1994                         if (rc)
1995                                 error = rc;
1996                 }
1997                 hlist_del_init(&cdqb->dqb_hash);
1998                 list_del(&cdqb->dqb_list);
1999                 OBD_FREE_PTR(cdqb);
2000         }
2001
2002         return error;
2003 }
2004
2005 #ifndef EXT3_FEATURE_RO_COMPAT_GDT_CSUM
2006 #define EXT3_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
2007 #endif
2008
2009 static int fsfilt_ext3_quotacheck(struct super_block *sb,
2010                                   struct obd_quotactl *oqc)
2011 {
2012         struct ext3_sb_info *sbi = EXT3_SB(sb);
2013         int i, group, uninit_feat = 0;
2014         struct qchk_ctxt *qctxt;
2015         struct buffer_head *bitmap_bh = NULL;
2016         unsigned long ino, inode_inuse;
2017         struct inode *inode;
2018         int rc = 0;
2019         ENTRY;
2020
2021         /* turn on quota and read dqinfo if existed */
2022         OBD_ALLOC_PTR(qctxt);
2023         if (!qctxt) {
2024                 oqc->qc_stat = -ENOMEM;
2025                 RETURN(-ENOMEM);
2026         }
2027
2028         for (i = 0; i < NR_DQHASH; i++)
2029                 INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
2030         INIT_LIST_HEAD(&qctxt->qckt_list);
2031
2032         for (i = 0; i < MAXQUOTAS; i++) {
2033                 if (!Q_TYPESET(oqc, i))
2034                         continue;
2035
2036                 rc = quota_onoff(sb, Q_QUOTAON, i, oqc->qc_id);
2037                 if (!rc || rc == -EBUSY) {
2038                         rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
2039                         if (rc)
2040                                 GOTO(out, rc);
2041                 } else if (rc == -ENOENT || rc == -EINVAL || rc == -EEXIST) {
2042                         qctxt->qckt_first_check[i] = 1;
2043                 } else if (rc) {
2044                         GOTO(out, rc);
2045                 }
2046         }
2047         if (EXT3_HAS_RO_COMPAT_FEATURE(sb, EXT3_FEATURE_RO_COMPAT_GDT_CSUM))
2048                 /* This filesystem supports the uninit group feature */
2049                 uninit_feat = 1;
2050
2051         /* number of inodes that have been allocated */
2052         inode_inuse = sbi->s_inodes_per_group * sbi->s_groups_count -
2053                       percpu_counter_sum(&sbi->s_freeinodes_counter);
2054
2055         /* check quota and update in hash */
2056         for (group = 0; group < sbi->s_groups_count && inode_inuse > 0;
2057              group++) {
2058                 unsigned long used_count = sbi->s_inodes_per_group;
2059
2060                 if (uninit_feat) {
2061                         struct ext3_group_desc *desc;
2062                         desc = get_group_desc(sb, group, NULL);
2063                         if (!desc)
2064                                 GOTO(out, -EIO);
2065
2066                         /* we don't really need to take the group lock here,
2067                          * but it may be useful if one day we support online
2068                          * quotacheck */
2069                         spin_lock(sb_bgl_lock(sbi, group));
2070                         if (desc->bg_flags & cpu_to_le16(EXT3_BG_INODE_UNINIT)) {
2071                                 /* no inode in use in this group, just skip it */
2072                                 spin_unlock(sb_bgl_lock(sbi, group));
2073                                 continue;
2074                         }
2075                         used_count -= ext3_itable_unused_count(sb, desc);
2076                         spin_unlock(sb_bgl_lock(sbi, group));
2077                 }
2078
2079                 bitmap_bh = ext3_read_inode_bitmap(sb, group);
2080                 if (!bitmap_bh) {
2081                         CERROR("%s: ext3_read_inode_bitmap group %d failed\n",
2082                                sb->s_id, group);
2083                         GOTO(out, -EIO);
2084                 }
2085
2086                 i = 0;
2087                 while (i < used_count &&
2088                        (i = ext3_find_next_bit(bitmap_bh->b_data,
2089                                                used_count, i)) < used_count) {
2090                         inode_inuse--;
2091                         i++;
2092                         ino = i + group * sbi->s_inodes_per_group;
2093                         if (ino < sbi->s_first_ino)
2094                                 continue;
2095 #if defined(HAVE_EXT4_LDISKFS) || !defined(HAVE_READ_INODE_IN_SBOPS)
2096                         inode = ext3_iget(sb, ino);
2097 #else
2098                         inode = iget(sb, ino);
2099 #endif
2100                         if (!inode || IS_ERR(inode))
2101                                 continue;
2102
2103                         rc = add_inode_quota(inode, qctxt, oqc);
2104                         iput(inode);
2105                         if (rc) {
2106                                 brelse(bitmap_bh);
2107                                 GOTO(out, rc);
2108                         }
2109                 }
2110                 brelse(bitmap_bh);
2111         }
2112
2113         /* read old quota limits from old quota file. (only for the user
2114          * has limits but hasn't file) */
2115 #ifdef HAVE_QUOTA_SUPPORT
2116         for (i = 0; i < MAXQUOTAS; i++) {
2117                 struct list_head id_list;
2118                 struct dquot_id *dqid, *tmp;
2119
2120                 if (!Q_TYPESET(oqc, i))
2121                         continue;
2122
2123                 if (qctxt->qckt_first_check[i])
2124                         continue;
2125
2126
2127                 LASSERT(sb_dqopt(sb)->files[i] != NULL);
2128                 INIT_LIST_HEAD(&id_list);
2129 #ifndef KERNEL_SUPPORTS_QUOTA_READ
2130                 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
2131 #else
2132                 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
2133 #endif
2134                 if (rc)
2135                         CERROR("read old limits failed. (rc:%d)\n", rc);
2136
2137                 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
2138                         list_del_init(&dqid->di_link);
2139
2140                         if (!rc)
2141                                 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
2142                                       dqid->di_id, i,
2143                                       qctxt->qckt_first_check[i]);
2144                         OBD_FREE_PTR(dqid);
2145                 }
2146         }
2147 #endif
2148         /* turn off quota cause we are to dump chk_dqblk to files */
2149         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2150
2151         rc = create_new_quota_files(qctxt, oqc);
2152         if (rc)
2153                 GOTO(out, rc);
2154
2155         /* we use vfs functions to set dqblk, so turn quota on */
2156         rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type, oqc->qc_id);
2157 out:
2158         /* dump and free chk_dqblk */
2159         rc = prune_chkquots(sb, qctxt, rc);
2160         OBD_FREE_PTR(qctxt);
2161
2162         /* turn off quota, `lfs quotacheck` will turn on when all
2163          * nodes quotacheck finish. */
2164         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2165
2166         oqc->qc_stat = rc;
2167         if (rc)
2168                 CERROR("quotacheck failed: rc = %d\n", rc);
2169
2170         RETURN(rc);
2171 }
2172
2173 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
2174                                  int cmd)
2175 {
2176         int rc = 0;
2177         ENTRY;
2178
2179         if (lqi->qi_files[type] == NULL) {
2180                 CERROR("operate qinfo before it's enabled!\n");
2181                 RETURN(-EIO);
2182         }
2183
2184         switch (cmd) {
2185         case QFILE_CHK:
2186                 rc = lustre_check_quota_file(lqi, type);
2187                 break;
2188         case QFILE_RD_INFO:
2189                 rc = lustre_read_quota_info(lqi, type);
2190                 break;
2191         case QFILE_WR_INFO:
2192                 rc = lustre_write_quota_info(lqi, type);
2193                 break;
2194         case QFILE_INIT_INFO:
2195                 rc = lustre_init_quota_info(lqi, type);
2196                 break;
2197         case QFILE_CONVERT:
2198                 rc = lustre_quota_convert(lqi, type);
2199                 break;
2200         default:
2201                 rc = -ENOTSUPP;
2202                 CERROR("Unsupported admin quota file cmd %d\n"
2203                        "Are lquota.ko and fsfilt_ldiskfs.ko modules in sync?\n",
2204                        cmd);
2205                 break;
2206         }
2207         RETURN(rc);
2208 }
2209
2210 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
2211                             struct list_head *list)
2212 {
2213         return lustre_get_qids(file, inode, type, list);
2214 }
2215
2216 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
2217 {
2218         int rc = 0;
2219         ENTRY;
2220
2221         if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
2222                 CERROR("operate dquot before it's enabled!\n");
2223                 RETURN(-EIO);
2224         }
2225
2226         switch (cmd) {
2227         case QFILE_RD_DQUOT:
2228                 rc = lustre_read_dquot(dquot);
2229                 break;
2230         case QFILE_WR_DQUOT:
2231                 if (dquot->dq_dqb.dqb_ihardlimit ||
2232                     dquot->dq_dqb.dqb_isoftlimit ||
2233                     dquot->dq_dqb.dqb_bhardlimit ||
2234                     dquot->dq_dqb.dqb_bsoftlimit)
2235                         clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2236                 else
2237                         set_bit(DQ_FAKE_B, &dquot->dq_flags);
2238
2239                 rc = lustre_commit_dquot(dquot);
2240                 if (rc >= 0)
2241                         rc = 0;
2242                 break;
2243         default:
2244                 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2245                 LBUG();
2246                 break;
2247         }
2248         RETURN(rc);
2249 }
2250
2251 static int fsfilt_ext3_get_mblk(struct super_block *sb, int *count,
2252                                 struct inode *inode, int frags)
2253 {
2254 #ifdef EXT3_EXT_HAS_NO_TREE
2255         struct ext3_ext_base *base = inode;
2256 #else
2257         struct ext3_extents_tree tree;
2258         struct ext3_ext_base *base = &tree;
2259
2260         ext3_init_tree_desc(base, inode);
2261 #endif
2262         /* for an ost_write request, it needs <#fragments> * <tree depth + 1>
2263          * metablocks at maxium b=16542 */
2264         *count = frags * (EXT_DEPTH(base) + 1) * EXT3_BLOCK_SIZE(sb);
2265         return 0;
2266 }
2267
2268 #endif
2269
2270 static lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2271 {
2272         return (EXT3_SB(sb)->journal_bdev);
2273 }
2274
2275 ssize_t lustre_read_quota(struct file *f, struct inode *inode, int type,
2276                           char *buf, int count, loff_t pos)
2277 {
2278         loff_t p = pos;
2279         int rc;
2280
2281         /* Support for both adm and op quota files must be provided */
2282         if (f) {
2283                 rc = fsfilt_ext3_read_record(f, buf, count, &p);
2284                 rc = rc < 0 ? rc : p - pos;
2285         } else {
2286                 struct super_block *sb = inode->i_sb;
2287                 rc = sb->s_op->quota_read(sb, type, buf, count, pos);
2288         }
2289         return rc;
2290 }
2291
2292 ssize_t lustre_write_quota(struct file *f, char *buf, int count, loff_t pos)
2293 {
2294         loff_t p = pos;
2295         int rc;
2296
2297         /* Only adm quota files are supported, op updates are handled by vfs */
2298         rc = fsfilt_ext3_write_record(f, buf, count, &p, 0);
2299         rc = rc < 0 ? rc : p - pos;
2300
2301         return rc;
2302 }
2303
2304 void *lustre_quota_journal_start(struct inode *inode, int delete)
2305 {
2306         handle_t *handle;
2307         unsigned block_count;
2308
2309         if (delete) {
2310                 /* each indirect block (+4) may become free, attaching to the
2311                  * header list of free blocks (+1); the data block (+1) may
2312                  * become a free block (+0) or a block with free dqentries (+0) */
2313                 block_count = (4 + 1) + 1;
2314                 handle = ext3_journal_start(inode,
2315                             block_count*FSFILT_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2316         } else {
2317                 /* indirect blocks are touched (+4), each causes file expansion (+0) or
2318                  * freeblk reusage with a header update (+1); dqentry is either reused
2319                  * causing update of the entry block (+1), prev (+1) and next (+1) or
2320                  * a new block allocation (+1) with a header update (+1)              */
2321                 block_count = (4 + 1) + 3;
2322                 handle = ext3_journal_start(inode,
2323                              block_count*FSFILT_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2324
2325         }
2326
2327         return handle;
2328 }
2329
2330 void lustre_quota_journal_stop(void *handle)
2331 {
2332         ext3_journal_stop((handle_t *)handle);
2333 }
2334
2335 static struct fsfilt_operations fsfilt_ext3_ops = {
2336         .fs_type                = "ext3",
2337         .fs_owner               = THIS_MODULE,
2338         .fs_getlabel            = fsfilt_ext3_get_label,
2339         .fs_setlabel            = fsfilt_ext3_set_label,
2340         .fs_uuid                = fsfilt_ext3_uuid,
2341         .fs_start               = fsfilt_ext3_start,
2342         .fs_brw_start           = fsfilt_ext3_brw_start,
2343         .fs_extend              = fsfilt_ext3_extend,
2344         .fs_commit              = fsfilt_ext3_commit,
2345         .fs_commit_async        = fsfilt_ext3_commit_async,
2346         .fs_commit_wait         = fsfilt_ext3_commit_wait,
2347         .fs_setattr             = fsfilt_ext3_setattr,
2348         .fs_iocontrol           = fsfilt_ext3_iocontrol,
2349         .fs_set_md              = fsfilt_ext3_set_md,
2350         .fs_get_md              = fsfilt_ext3_get_md,
2351         .fs_readpage            = fsfilt_ext3_readpage,
2352         .fs_add_journal_cb      = fsfilt_ext3_add_journal_cb,
2353         .fs_statfs              = fsfilt_ext3_statfs,
2354         .fs_sync                = fsfilt_ext3_sync,
2355         .fs_map_inode_pages     = fsfilt_ext3_map_inode_pages,
2356         .fs_write_record        = fsfilt_ext3_write_record,
2357         .fs_read_record         = fsfilt_ext3_read_record,
2358         .fs_setup               = fsfilt_ext3_setup,
2359         .fs_send_bio            = fsfilt_ext3_send_bio,
2360         .fs_get_op_len          = fsfilt_ext3_get_op_len,
2361 #ifdef HAVE_DISK_INODE_VERSION
2362         .fs_get_version         = fsfilt_ext3_get_version,
2363         .fs_set_version         = fsfilt_ext3_set_version,
2364 #endif
2365 #ifdef HAVE_QUOTA_SUPPORT
2366         .fs_quotactl            = fsfilt_ext3_quotactl,
2367         .fs_quotacheck          = fsfilt_ext3_quotacheck,
2368         .fs_quotainfo           = fsfilt_ext3_quotainfo,
2369         .fs_qids                = fsfilt_ext3_qids,
2370         .fs_dquot               = fsfilt_ext3_dquot,
2371         .fs_get_mblk            = fsfilt_ext3_get_mblk,
2372 #endif
2373         .fs_journal_sbdev       = fsfilt_ext3_journal_sbdev,
2374 };
2375
2376 static int __init fsfilt_ext3_init(void)
2377 {
2378         int rc;
2379
2380         fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2381                                          sizeof(struct fsfilt_cb_data), 0, 0);
2382         if (!fcb_cache) {
2383                 CERROR("error allocating fsfilt journal callback cache\n");
2384                 GOTO(out, rc = -ENOMEM);
2385         }
2386
2387         rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2388
2389         if (rc) {
2390                 int err = cfs_mem_cache_destroy(fcb_cache);
2391                 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2392         }
2393 out:
2394         return rc;
2395 }
2396
2397 static void __exit fsfilt_ext3_exit(void)
2398 {
2399         int rc;
2400
2401         fsfilt_unregister_ops(&fsfilt_ext3_ops);
2402         rc = cfs_mem_cache_destroy(fcb_cache);
2403         LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2404 }
2405
2406 module_init(fsfilt_ext3_init);
2407 module_exit(fsfilt_ext3_exit);
2408
2409 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2410 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2411 MODULE_LICENSE("GPL");