fs/ocfs2/quota_local.c

   1 /*
   2  *  Implementation of operations over local quota file
   3  */
   4
   5 #include <linux/fs.h>
   6 #include <linux/slab.h>
   7 #include <linux/quota.h>
   8 #include <linux/quotaops.h>
   9 #include <linux/module.h>
  10
  11 #include <cluster/masklog.h>
  12
  13 #include "ocfs2_fs.h"
  14 #include "ocfs2.h"
  15 #include "inode.h"
  16 #include "alloc.h"
  17 #include "file.h"
  18 #include "buffer_head_io.h"
  19 #include "journal.h"
  20 #include "sysfile.h"
  21 #include "dlmglue.h"
  22 #include "quota.h"
  23 #include "uptodate.h"
  24 #include "super.h"
  25 #include "ocfs2_trace.h"
  26
  27 /* Number of local quota structures per block */
  28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
  29 {
  30         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
  31                 sizeof(struct ocfs2_local_disk_dqblk));
  32 }
  33
  34 /* Number of blocks with entries in one chunk */
  35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
  36 {
  37         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
  38                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
  39                ol_quota_entries_per_block(sb);
  40 }
  41
  42 /* Number of entries in a chunk bitmap */
  43 static unsigned int ol_chunk_entries(struct super_block *sb)
  44 {
  45         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
  46 }
  47
  48 /* Offset of the chunk in quota file */
  49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
  50 {
  51         /* 1 block for local quota file info, 1 block per chunk for chunk info */
  52         return 1 + (ol_chunk_blocks(sb) + 1) * c;
  53 }
  54
  55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
  56 {
  57         int epb = ol_quota_entries_per_block(sb);
  58
  59         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
  60 }
  61
  62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
  63 {
  64         int epb = ol_quota_entries_per_block(sb);
  65
  66         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
  67 }
  68
  69 /* Offset of the dquot structure in the quota file */
  70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
  71 {
  72         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
  73                ol_dqblk_block_off(sb, c, off);
  74 }
  75
  76 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
  77 {
  78         return off & ((1 << sb->s_blocksize_bits) - 1);
  79 }
  80
  81 /* Compute offset in the chunk of a structure with the given offset */
  82 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
  83 {
  84         int epb = ol_quota_entries_per_block(sb);
  85
  86         return ((off >> sb->s_blocksize_bits) -
  87                         ol_quota_chunk_block(sb, c) - 1) * epb
  88                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
  89                  sizeof(struct ocfs2_local_disk_dqblk);
  90 }
  91
  92 /* Write bufferhead into the fs */
  93 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
  94                 void (*modify)(struct buffer_head *, void *), void *private)
  95 {
  96         struct super_block *sb = inode->i_sb;
  97         handle_t *handle;
  98         int status;
  99
 100         handle = ocfs2_start_trans(OCFS2_SB(sb),
 101                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 102         if (IS_ERR(handle)) {
 103                 status = PTR_ERR(handle);
 104                 mlog_errno(status);
 105                 return status;
 106         }
 107         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
 108                                          OCFS2_JOURNAL_ACCESS_WRITE);
 109         if (status < 0) {
 110                 mlog_errno(status);
 111                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
 112                 return status;
 113         }
 114         lock_buffer(bh);
 115         modify(bh, private);
 116         unlock_buffer(bh);
 117         ocfs2_journal_dirty(handle, bh);
 118
 119         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
 120         if (status < 0) {
 121                 mlog_errno(status);
 122                 return status;
 123         }
 124         return 0;
 125 }
 126
 127 /*
 128  * Read quota block from a given logical offset.
 129  *
 130  * This function acquires ip_alloc_sem and thus it must not be called with a
 131  * transaction started.
 132  */
 133 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
 134                                   struct buffer_head **bh)
 135 {
 136         int rc = 0;
 137         struct buffer_head *tmp = *bh;
 138
 139         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
 140                 ocfs2_error(inode->i_sb,
 141                             "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
 142                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
 143                             (unsigned long long)v_block,
 144                             (unsigned long long)i_size_read(inode));
 145                 return -EIO;
 146         }
 147         rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
 148                                     ocfs2_validate_quota_block);
 149         if (rc)
 150                 mlog_errno(rc);
 151
 152         /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
 153         if (!rc && !*bh)
 154                 *bh = tmp;
 155
 156         return rc;
 157 }
 158
 159 /* Check whether we understand format of quota files */
 160 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
 161 {
 162         unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 163         unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 164         unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 165         unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 166         unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
 167                                               GROUP_QUOTA_SYSTEM_INODE };
 168         struct buffer_head *bh = NULL;
 169         struct inode *linode = sb_dqopt(sb)->files[type];
 170         struct inode *ginode = NULL;
 171         struct ocfs2_disk_dqheader *dqhead;
 172         int status, ret = 0;
 173
 174         /* First check whether we understand local quota file */
 175         status = ocfs2_read_quota_block(linode, 0, &bh);
 176         if (status) {
 177                 mlog_errno(status);
 178                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
 179                         type);
 180                 goto out_err;
 181         }
 182         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 183         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
 184                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
 185                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
 186                         lmagics[type], type);
 187                 goto out_err;
 188         }
 189         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
 190                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
 191                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
 192                         lversions[type], type);
 193                 goto out_err;
 194         }
 195         brelse(bh);
 196         bh = NULL;
 197
 198         /* Next check whether we understand global quota file */
 199         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
 200                                                 OCFS2_INVALID_SLOT);
 201         if (!ginode) {
 202                 mlog(ML_ERROR, "cannot get global quota file inode "
 203                                 "(type=%d)\n", type);
 204                 goto out_err;
 205         }
 206         /* Since the header is read only, we don't care about locking */
 207         status = ocfs2_read_quota_block(ginode, 0, &bh);
 208         if (status) {
 209                 mlog_errno(status);
 210                 mlog(ML_ERROR, "failed to read global quota file header "
 211                                 "(type=%d)\n", type);
 212                 goto out_err;
 213         }
 214         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 215         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
 216                 mlog(ML_ERROR, "global quota file magic does not match "
 217                         "(%u != %u), type=%d\n",
 218                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
 219                 goto out_err;
 220         }
 221         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
 222                 mlog(ML_ERROR, "global quota file version does not match "
 223                         "(%u != %u), type=%d\n",
 224                         le32_to_cpu(dqhead->dqh_version), gversions[type],
 225                         type);
 226                 goto out_err;
 227         }
 228
 229         ret = 1;
 230 out_err:
 231         brelse(bh);
 232         iput(ginode);
 233         return ret;
 234 }
 235
 236 /* Release given list of quota file chunks */
 237 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
 238 {
 239         struct ocfs2_quota_chunk *pos, *next;
 240
 241         list_for_each_entry_safe(pos, next, head, qc_chunk) {
 242                 list_del(&pos->qc_chunk);
 243                 brelse(pos->qc_headerbh);
 244                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
 245         }
 246 }
 247
 248 /* Load quota bitmaps into memory */
 249 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
 250                         struct ocfs2_local_disk_dqinfo *ldinfo,
 251                         struct list_head *head)
 252 {
 253         struct ocfs2_quota_chunk *newchunk;
 254         int i, status;
 255
 256         INIT_LIST_HEAD(head);
 257         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
 258                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 259                 if (!newchunk) {
 260                         ocfs2_release_local_quota_bitmaps(head);
 261                         return -ENOMEM;
 262                 }
 263                 newchunk->qc_num = i;
 264                 newchunk->qc_headerbh = NULL;
 265                 status = ocfs2_read_quota_block(inode,
 266                                 ol_quota_chunk_block(inode->i_sb, i),
 267                                 &newchunk->qc_headerbh);
 268                 if (status) {
 269                         mlog_errno(status);
 270                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
 271                         ocfs2_release_local_quota_bitmaps(head);
 272                         return status;
 273                 }
 274                 list_add_tail(&newchunk->qc_chunk, head);
 275         }
 276         return 0;
 277 }
 278
 279 static void olq_update_info(struct buffer_head *bh, void *private)
 280 {
 281         struct mem_dqinfo *info = private;
 282         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 283         struct ocfs2_local_disk_dqinfo *ldinfo;
 284
 285         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 286                                                 OCFS2_LOCAL_INFO_OFF);
 287         spin_lock(&dq_data_lock);
 288         ldinfo->dqi_flags = cpu_to_le32(oinfo->dqi_flags);
 289         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
 290         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
 291         spin_unlock(&dq_data_lock);
 292 }
 293
 294 static int ocfs2_add_recovery_chunk(struct super_block *sb,
 295                                     struct ocfs2_local_disk_chunk *dchunk,
 296                                     int chunk,
 297                                     struct list_head *head)
 298 {
 299         struct ocfs2_recovery_chunk *rc;
 300
 301         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
 302         if (!rc)
 303                 return -ENOMEM;
 304         rc->rc_chunk = chunk;
 305         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
 306         if (!rc->rc_bitmap) {
 307                 kfree(rc);
 308                 return -ENOMEM;
 309         }
 310         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
 311                (ol_chunk_entries(sb) + 7) >> 3);
 312         list_add_tail(&rc->rc_list, head);
 313         return 0;
 314 }
 315
 316 static void free_recovery_list(struct list_head *head)
 317 {
 318         struct ocfs2_recovery_chunk *next;
 319         struct ocfs2_recovery_chunk *rchunk;
 320
 321         list_for_each_entry_safe(rchunk, next, head, rc_list) {
 322                 list_del(&rchunk->rc_list);
 323                 kfree(rchunk->rc_bitmap);
 324                 kfree(rchunk);
 325         }
 326 }
 327
 328 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
 329 {
 330         int type;
 331
 332         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 333                 free_recovery_list(&(rec->r_list[type]));
 334         kfree(rec);
 335 }
 336
 337 /* Load entries in our quota file we have to recover*/
 338 static int ocfs2_recovery_load_quota(struct inode *lqinode,
 339                                      struct ocfs2_local_disk_dqinfo *ldinfo,
 340                                      int type,
 341                                      struct list_head *head)
 342 {
 343         struct super_block *sb = lqinode->i_sb;
 344         struct buffer_head *hbh;
 345         struct ocfs2_local_disk_chunk *dchunk;
 346         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
 347         int status = 0;
 348
 349         for (i = 0; i < chunks; i++) {
 350                 hbh = NULL;
 351                 status = ocfs2_read_quota_block(lqinode,
 352                                                 ol_quota_chunk_block(sb, i),
 353                                                 &hbh);
 354                 if (status) {
 355                         mlog_errno(status);
 356                         break;
 357                 }
 358                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 359                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
 360                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
 361                 brelse(hbh);
 362                 if (status < 0)
 363                         break;
 364         }
 365         if (status < 0)
 366                 free_recovery_list(head);
 367         return status;
 368 }
 369
 370 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
 371 {
 372         int type;
 373         struct ocfs2_quota_recovery *rec;
 374
 375         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
 376         if (!rec)
 377                 return NULL;
 378         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 379                 INIT_LIST_HEAD(&(rec->r_list[type]));
 380         return rec;
 381 }
 382
 383 /* Load information we need for quota recovery into memory */
 384 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
 385                                                 struct ocfs2_super *osb,
 386                                                 int slot_num)
 387 {
 388         unsigned int feature[OCFS2_MAXQUOTAS] = {
 389                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 390                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 391         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 392                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 393         struct super_block *sb = osb->sb;
 394         struct ocfs2_local_disk_dqinfo *ldinfo;
 395         struct inode *lqinode;
 396         struct buffer_head *bh;
 397         int type;
 398         int status = 0;
 399         struct ocfs2_quota_recovery *rec;
 400
 401         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 402                "slot %u\n", osb->dev_str, slot_num);
 403
 404         rec = ocfs2_alloc_quota_recovery();
 405         if (!rec)
 406                 return ERR_PTR(-ENOMEM);
 407         /* First init... */
 408
 409         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 410                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 411                         continue;
 412                 /* At this point, journal of the slot is already replayed so
 413                  * we can trust metadata and data of the quota file */
 414                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 415                 if (!lqinode) {
 416                         status = -ENOENT;
 417                         goto out;
 418                 }
 419                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 420                                                OCFS2_META_LOCK_RECOVERY);
 421                 if (status < 0) {
 422                         mlog_errno(status);
 423                         goto out_put;
 424                 }
 425                 /* Now read local header */
 426                 bh = NULL;
 427                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 428                 if (status) {
 429                         mlog_errno(status);
 430                         mlog(ML_ERROR, "failed to read quota file info header "
 431                                 "(slot=%d type=%d)\n", slot_num, type);
 432                         goto out_lock;
 433                 }
 434                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 435                                                         OCFS2_LOCAL_INFO_OFF);
 436                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 437                                                    &rec->r_list[type]);
 438                 brelse(bh);
 439 out_lock:
 440                 ocfs2_inode_unlock(lqinode, 1);
 441 out_put:
 442                 iput(lqinode);
 443                 if (status < 0)
 444                         break;
 445         }
 446 out:
 447         if (status < 0) {
 448                 ocfs2_free_quota_recovery(rec);
 449                 rec = ERR_PTR(status);
 450         }
 451         return rec;
 452 }
 453
 454 /* Sync changes in local quota file into global quota file and
 455  * reinitialize local quota file.
 456  * The function expects local quota file to be already locked and
 457  * dqonoff_mutex locked. */
 458 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 459                                           int type,
 460                                           struct ocfs2_quota_recovery *rec)
 461 {
 462         struct super_block *sb = lqinode->i_sb;
 463         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 464         struct ocfs2_local_disk_chunk *dchunk;
 465         struct ocfs2_local_disk_dqblk *dqblk;
 466         struct dquot *dquot;
 467         handle_t *handle;
 468         struct buffer_head *hbh = NULL, *qbh = NULL;
 469         int status = 0;
 470         int bit, chunk;
 471         struct ocfs2_recovery_chunk *rchunk, *next;
 472         qsize_t spacechange, inodechange;
 473
 474         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 475
 476         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 477                 chunk = rchunk->rc_chunk;
 478                 hbh = NULL;
 479                 status = ocfs2_read_quota_block(lqinode,
 480                                                 ol_quota_chunk_block(sb, chunk),
 481                                                 &hbh);
 482                 if (status) {
 483                         mlog_errno(status);
 484                         break;
 485                 }
 486                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 487                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 488                         qbh = NULL;
 489                         status = ocfs2_read_quota_block(lqinode,
 490                                                 ol_dqblk_block(sb, chunk, bit),
 491                                                 &qbh);
 492                         if (status) {
 493                                 mlog_errno(status);
 494                                 break;
 495                         }
 496                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 497                                 ol_dqblk_block_off(sb, chunk, bit));
 498                         dquot = dqget(sb,
 499                                       make_kqid(&init_user_ns, type,
 500                                                 le64_to_cpu(dqblk->dqb_id)));
 501                         if (IS_ERR(dquot)) {
 502                                 status = PTR_ERR(dquot);
 503                                 mlog(ML_ERROR, "Failed to get quota structure "
 504                                      "for id %u, type %d. Cannot finish quota "
 505                                      "file recovery.\n",
 506                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
 507                                      type);
 508                                 goto out_put_bh;
 509                         }
 510                         status = ocfs2_lock_global_qf(oinfo, 1);
 511                         if (status < 0) {
 512                                 mlog_errno(status);
 513                                 goto out_put_dquot;
 514                         }
 515
 516                         handle = ocfs2_start_trans(OCFS2_SB(sb),
 517                                                    OCFS2_QSYNC_CREDITS);
 518                         if (IS_ERR(handle)) {
 519                                 status = PTR_ERR(handle);
 520                                 mlog_errno(status);
 521                                 goto out_drop_lock;
 522                         }
 523                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 524                         spin_lock(&dq_data_lock);
 525                         /* Add usage from quota entry into quota changes
 526                          * of our node. Auxiliary variables are important
 527                          * due to signedness */
 528                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 529                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 530                         dquot->dq_dqb.dqb_curspace += spacechange;
 531                         dquot->dq_dqb.dqb_curinodes += inodechange;
 532                         spin_unlock(&dq_data_lock);
 533                         /* We want to drop reference held by the crashed
 534                          * node. Since we have our own reference we know
 535                          * global structure actually won't be freed. */
 536                         status = ocfs2_global_release_dquot(dquot);
 537                         if (status < 0) {
 538                                 mlog_errno(status);
 539                                 goto out_commit;
 540                         }
 541                         /* Release local quota file entry */
 542                         status = ocfs2_journal_access_dq(handle,
 543                                         INODE_CACHE(lqinode),
 544                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 545                         if (status < 0) {
 546                                 mlog_errno(status);
 547                                 goto out_commit;
 548                         }
 549                         lock_buffer(qbh);
 550                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 551                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 552                         le32_add_cpu(&dchunk->dqc_free, 1);
 553                         unlock_buffer(qbh);
 554                         ocfs2_journal_dirty(handle, qbh);
 555 out_commit:
 556                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 557                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
 558 out_drop_lock:
 559                         ocfs2_unlock_global_qf(oinfo, 1);
 560 out_put_dquot:
 561                         dqput(dquot);
 562 out_put_bh:
 563                         brelse(qbh);
 564                         if (status < 0)
 565                                 break;
 566                 }
 567                 brelse(hbh);
 568                 list_del(&rchunk->rc_list);
 569                 kfree(rchunk->rc_bitmap);
 570                 kfree(rchunk);
 571                 if (status < 0)
 572                         break;
 573         }
 574         if (status < 0)
 575                 free_recovery_list(&(rec->r_list[type]));
 576         if (status)
 577                 mlog_errno(status);
 578         return status;
 579 }
 580
 581 /* Recover local quota files for given node different from us */
 582 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 583                                 struct ocfs2_quota_recovery *rec,
 584                                 int slot_num)
 585 {
 586         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 587                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 588         struct super_block *sb = osb->sb;
 589         struct ocfs2_local_disk_dqinfo *ldinfo;
 590         struct buffer_head *bh;
 591         handle_t *handle;
 592         int type;
 593         int status = 0;
 594         struct inode *lqinode;
 595         unsigned int flags;
 596
 597         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 598                "slot %u\n", osb->dev_str, slot_num);
 599
 600         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 601         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 602                 if (list_empty(&(rec->r_list[type])))
 603                         continue;
 604                 trace_ocfs2_finish_quota_recovery(slot_num);
 605                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 606                 if (!lqinode) {
 607                         status = -ENOENT;
 608                         goto out;
 609                 }
 610                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 611                                                        OCFS2_META_LOCK_NOQUEUE);
 612                 /* Someone else is holding the lock? Then he must be
 613                  * doing the recovery. Just skip the file... */
 614                 if (status == -EAGAIN) {
 615                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 616                                "device (%s) for slot %d because quota file is "
 617                                "locked.\n", osb->dev_str, slot_num);
 618                         status = 0;
 619                         goto out_put;
 620                 } else if (status < 0) {
 621                         mlog_errno(status);
 622                         goto out_put;
 623                 }
 624                 /* Now read local header */
 625                 bh = NULL;
 626                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 627                 if (status) {
 628                         mlog_errno(status);
 629                         mlog(ML_ERROR, "failed to read quota file info header "
 630                                 "(slot=%d type=%d)\n", slot_num, type);
 631                         goto out_lock;
 632                 }
 633                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 634                                                         OCFS2_LOCAL_INFO_OFF);
 635                 /* Is recovery still needed? */
 636                 flags = le32_to_cpu(ldinfo->dqi_flags);
 637                 if (!(flags & OLQF_CLEAN))
 638                         status = ocfs2_recover_local_quota_file(lqinode,
 639                                                                 type,
 640                                                                 rec);
 641                 /* We don't want to mark file as clean when it is actually
 642                  * active */
 643                 if (slot_num == osb->slot_num)
 644                         goto out_bh;
 645                 /* Mark quota file as clean if we are recovering quota file of
 646                  * some other node. */
 647                 handle = ocfs2_start_trans(osb,
 648                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 649                 if (IS_ERR(handle)) {
 650                         status = PTR_ERR(handle);
 651                         mlog_errno(status);
 652                         goto out_bh;
 653                 }
 654                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 655                                                  bh,
 656                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 657                 if (status < 0) {
 658                         mlog_errno(status);
 659                         goto out_trans;
 660                 }
 661                 lock_buffer(bh);
 662                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 663                 unlock_buffer(bh);
 664                 ocfs2_journal_dirty(handle, bh);
 665 out_trans:
 666                 ocfs2_commit_trans(osb, handle);
 667 out_bh:
 668                 brelse(bh);
 669 out_lock:
 670                 ocfs2_inode_unlock(lqinode, 1);
 671 out_put:
 672                 iput(lqinode);
 673                 if (status < 0)
 674                         break;
 675         }
 676 out:
 677         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 678         kfree(rec);
 679         return status;
 680 }
 681
 682 /* Read information header from quota file */
 683 static int ocfs2_local_read_info(struct super_block *sb, int type)
 684 {
 685         struct ocfs2_local_disk_dqinfo *ldinfo;
 686         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 687         struct ocfs2_mem_dqinfo *oinfo;
 688         struct inode *lqinode = sb_dqopt(sb)->files[type];
 689         int status;
 690         struct buffer_head *bh = NULL;
 691         struct ocfs2_quota_recovery *rec;
 692         int locked = 0;
 693
 694         /* We don't need the lock and we have to acquire quota file locks
 695          * which will later depend on this lock */
 696         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 697         info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
 698         info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
 699         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 700         if (!oinfo) {
 701                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 702                                " info.");
 703                 goto out_err;
 704         }
 705         info->dqi_priv = oinfo;
 706         oinfo->dqi_type = type;
 707         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 708         oinfo->dqi_rec = NULL;
 709         oinfo->dqi_lqi_bh = NULL;
 710         oinfo->dqi_libh = NULL;
 711
 712         status = ocfs2_global_read_info(sb, type);
 713         if (status < 0)
 714                 goto out_err;
 715
 716         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 717         if (status < 0) {
 718                 mlog_errno(status);
 719                 goto out_err;
 720         }
 721         locked = 1;
 722
 723         /* Now read local header */
 724         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 725         if (status) {
 726                 mlog_errno(status);
 727                 mlog(ML_ERROR, "failed to read quota file info header "
 728                         "(type=%d)\n", type);
 729                 goto out_err;
 730         }
 731         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 732                                                 OCFS2_LOCAL_INFO_OFF);
 733         oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 734         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 735         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 736         oinfo->dqi_libh = bh;
 737
 738         /* We crashed when using local quota file? */
 739         if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
 740                 rec = OCFS2_SB(sb)->quota_rec;
 741                 if (!rec) {
 742                         rec = ocfs2_alloc_quota_recovery();
 743                         if (!rec) {
 744                                 status = -ENOMEM;
 745                                 mlog_errno(status);
 746                                 goto out_err;
 747                         }
 748                         OCFS2_SB(sb)->quota_rec = rec;
 749                 }
 750
 751                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 752                                                    &rec->r_list[type]);
 753                 if (status < 0) {
 754                         mlog_errno(status);
 755                         goto out_err;
 756                 }
 757         }
 758
 759         status = ocfs2_load_local_quota_bitmaps(lqinode,
 760                                                 ldinfo,
 761                                                 &oinfo->dqi_chunk);
 762         if (status < 0) {
 763                 mlog_errno(status);
 764                 goto out_err;
 765         }
 766
 767         /* Now mark quota file as used */
 768         oinfo->dqi_flags &= ~OLQF_CLEAN;
 769         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 770         if (status < 0) {
 771                 mlog_errno(status);
 772                 goto out_err;
 773         }
 774
 775         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 776         return 0;
 777 out_err:
 778         if (oinfo) {
 779                 iput(oinfo->dqi_gqinode);
 780                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 781                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 782                 brelse(oinfo->dqi_lqi_bh);
 783                 if (locked)
 784                         ocfs2_inode_unlock(lqinode, 1);
 785                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 786                 kfree(oinfo);
 787         }
 788         brelse(bh);
 789         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 790         return -1;
 791 }
 792
 793 /* Write local info to quota file */
 794 static int ocfs2_local_write_info(struct super_block *sb, int type)
 795 {
 796         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 797         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 798                                                 ->dqi_libh;
 799         int status;
 800
 801         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 802                                  info);
 803         if (status < 0) {
 804                 mlog_errno(status);
 805                 return -1;
 806         }
 807
 808         return 0;
 809 }
 810
 811 /* Release info from memory */
 812 static int ocfs2_local_free_info(struct super_block *sb, int type)
 813 {
 814         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 815         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 816         struct ocfs2_quota_chunk *chunk;
 817         struct ocfs2_local_disk_chunk *dchunk;
 818         int mark_clean = 1, len;
 819         int status;
 820
 821         iput(oinfo->dqi_gqinode);
 822         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 823         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 824         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 825                 dchunk = (struct ocfs2_local_disk_chunk *)
 826                                         (chunk->qc_headerbh->b_data);
 827                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 828                         len = ol_chunk_entries(sb);
 829                 } else {
 830                         len = (oinfo->dqi_blocks -
 831                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 832                               * ol_quota_entries_per_block(sb);
 833                 }
 834                 /* Not all entries free? Bug! */
 835                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 836                         mlog(ML_ERROR, "releasing quota file with used "
 837                                         "entries (type=%d)\n", type);
 838                         mark_clean = 0;
 839                 }
 840         }
 841         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 842
 843         /* dqonoff_mutex protects us against racing with recovery thread... */
 844         if (oinfo->dqi_rec) {
 845                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 846                 mark_clean = 0;
 847         }
 848
 849         if (!mark_clean)
 850                 goto out;
 851
 852         /* Mark local file as clean */
 853         oinfo->dqi_flags |= OLQF_CLEAN;
 854         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 855                                  oinfo->dqi_libh,
 856                                  olq_update_info,
 857                                  info);
 858         if (status < 0) {
 859                 mlog_errno(status);
 860                 goto out;
 861         }
 862
 863 out:
 864         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 865         brelse(oinfo->dqi_libh);
 866         brelse(oinfo->dqi_lqi_bh);
 867         kfree(oinfo);
 868         return 0;
 869 }
 870
 871 static void olq_set_dquot(struct buffer_head *bh, void *private)
 872 {
 873         struct ocfs2_dquot *od = private;
 874         struct ocfs2_local_disk_dqblk *dqblk;
 875         struct super_block *sb = od->dq_dquot.dq_sb;
 876
 877         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 878                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 879
 880         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
 881                                               od->dq_dquot.dq_id));
 882         spin_lock(&dq_data_lock);
 883         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 884                                           od->dq_origspace);
 885         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 886                                           od->dq_originodes);
 887         spin_unlock(&dq_data_lock);
 888         trace_olq_set_dquot(
 889                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 890                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 891                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
 892 }
 893
 894 /* Write dquot to local quota file */
 895 int ocfs2_local_write_dquot(struct dquot *dquot)
 896 {
 897         struct super_block *sb = dquot->dq_sb;
 898         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 899         struct buffer_head *bh;
 900         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
 901         int status;
 902
 903         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 904                                              &bh);
 905         if (status) {
 906                 mlog_errno(status);
 907                 goto out;
 908         }
 909         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 910         if (status < 0) {
 911                 mlog_errno(status);
 912                 goto out;
 913         }
 914 out:
 915         brelse(bh);
 916         return status;
 917 }
 918
 919 /* Find free entry in local quota file */
 920 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 921                                                        int type,
 922                                                        int *offset)
 923 {
 924         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 925         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 926         struct ocfs2_quota_chunk *chunk;
 927         struct ocfs2_local_disk_chunk *dchunk;
 928         int found = 0, len;
 929
 930         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 931                 dchunk = (struct ocfs2_local_disk_chunk *)
 932                                                 chunk->qc_headerbh->b_data;
 933                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
 934                         found = 1;
 935                         break;
 936                 }
 937         }
 938         if (!found)
 939                 return NULL;
 940
 941         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 942                 len = ol_chunk_entries(sb);
 943         } else {
 944                 len = (oinfo->dqi_blocks -
 945                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 946                       * ol_quota_entries_per_block(sb);
 947         }
 948
 949         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 950         /* We failed? */
 951         if (found == len) {
 952                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 953                      " entries free (type=%d)\n", chunk->qc_num,
 954                      le32_to_cpu(dchunk->dqc_free), type);
 955                 return ERR_PTR(-EIO);
 956         }
 957         *offset = found;
 958         return chunk;
 959 }
 960
 961 /* Add new chunk to the local quota file */
 962 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 963                                                         struct super_block *sb,
 964                                                         int type,
 965                                                         int *offset)
 966 {
 967         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 968         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 969         struct inode *lqinode = sb_dqopt(sb)->files[type];
 970         struct ocfs2_quota_chunk *chunk = NULL;
 971         struct ocfs2_local_disk_chunk *dchunk;
 972         int status;
 973         handle_t *handle;
 974         struct buffer_head *bh = NULL, *dbh = NULL;
 975         u64 p_blkno;
 976
 977         /* We are protected by dqio_sem so no locking needed */
 978         status = ocfs2_extend_no_holes(lqinode, NULL,
 979                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
 980                                        i_size_read(lqinode));
 981         if (status < 0) {
 982                 mlog_errno(status);
 983                 goto out;
 984         }
 985         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 986                                           i_size_read(lqinode) + 2 * sb->s_blocksize);
 987         if (status < 0) {
 988                 mlog_errno(status);
 989                 goto out;
 990         }
 991
 992         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 993         if (!chunk) {
 994                 status = -ENOMEM;
 995                 mlog_errno(status);
 996                 goto out;
 997         }
 998         /* Local quota info and two new blocks we initialize */
 999         handle = ocfs2_start_trans(OCFS2_SB(sb),
1000                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1001                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1002         if (IS_ERR(handle)) {
1003                 status = PTR_ERR(handle);
1004                 mlog_errno(status);
1005                 goto out;
1006         }
1007
1008         /* Initialize chunk header */
1009         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1010                                              &p_blkno, NULL, NULL);
1011         if (status < 0) {
1012                 mlog_errno(status);
1013                 goto out_trans;
1014         }
1015         bh = sb_getblk(sb, p_blkno);
1016         if (!bh) {
1017                 status = -ENOMEM;
1018                 mlog_errno(status);
1019                 goto out_trans;
1020         }
1021         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1022         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1023         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1024                                          OCFS2_JOURNAL_ACCESS_CREATE);
1025         if (status < 0) {
1026                 mlog_errno(status);
1027                 goto out_trans;
1028         }
1029         lock_buffer(bh);
1030         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1031         memset(dchunk->dqc_bitmap, 0,
1032                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1033                OCFS2_QBLK_RESERVED_SPACE);
1034         unlock_buffer(bh);
1035         ocfs2_journal_dirty(handle, bh);
1036
1037         /* Initialize new block with structures */
1038         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1039                                              &p_blkno, NULL, NULL);
1040         if (status < 0) {
1041                 mlog_errno(status);
1042                 goto out_trans;
1043         }
1044         dbh = sb_getblk(sb, p_blkno);
1045         if (!dbh) {
1046                 status = -ENOMEM;
1047                 mlog_errno(status);
1048                 goto out_trans;
1049         }
1050         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1051         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1052                                          OCFS2_JOURNAL_ACCESS_CREATE);
1053         if (status < 0) {
1054                 mlog_errno(status);
1055                 goto out_trans;
1056         }
1057         lock_buffer(dbh);
1058         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1059         unlock_buffer(dbh);
1060         ocfs2_journal_dirty(handle, dbh);
1061
1062         /* Update local quotafile info */
1063         oinfo->dqi_blocks += 2;
1064         oinfo->dqi_chunks++;
1065         status = ocfs2_local_write_info(sb, type);
1066         if (status < 0) {
1067                 mlog_errno(status);
1068                 goto out_trans;
1069         }
1070         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1071         if (status < 0) {
1072                 mlog_errno(status);
1073                 goto out;
1074         }
1075
1076         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1077         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1078                                    struct ocfs2_quota_chunk,
1079                                    qc_chunk)->qc_num + 1;
1080         chunk->qc_headerbh = bh;
1081         *offset = 0;
1082         return chunk;
1083 out_trans:
1084         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1085 out:
1086         brelse(bh);
1087         brelse(dbh);
1088         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1089         return ERR_PTR(status);
1090 }
1091
1092 /* Find free entry in local quota file */
1093 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1094                                                        struct super_block *sb,
1095                                                        int type,
1096                                                        int *offset)
1097 {
1098         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1099         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1100         struct ocfs2_quota_chunk *chunk;
1101         struct inode *lqinode = sb_dqopt(sb)->files[type];
1102         struct ocfs2_local_disk_chunk *dchunk;
1103         int epb = ol_quota_entries_per_block(sb);
1104         unsigned int chunk_blocks;
1105         struct buffer_head *bh;
1106         u64 p_blkno;
1107         int status;
1108         handle_t *handle;
1109
1110         if (list_empty(&oinfo->dqi_chunk))
1111                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1112         /* Is the last chunk full? */
1113         chunk = list_entry(oinfo->dqi_chunk.prev,
1114                         struct ocfs2_quota_chunk, qc_chunk);
1115         chunk_blocks = oinfo->dqi_blocks -
1116                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1117         if (ol_chunk_blocks(sb) == chunk_blocks)
1118                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1119
1120         /* We are protected by dqio_sem so no locking needed */
1121         status = ocfs2_extend_no_holes(lqinode, NULL,
1122                                        i_size_read(lqinode) + sb->s_blocksize,
1123                                        i_size_read(lqinode));
1124         if (status < 0) {
1125                 mlog_errno(status);
1126                 goto out;
1127         }
1128         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1129                                           i_size_read(lqinode) + sb->s_blocksize);
1130         if (status < 0) {
1131                 mlog_errno(status);
1132                 goto out;
1133         }
1134
1135         /* Get buffer from the just added block */
1136         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1137                                              &p_blkno, NULL, NULL);
1138         if (status < 0) {
1139                 mlog_errno(status);
1140                 goto out;
1141         }
1142         bh = sb_getblk(sb, p_blkno);
1143         if (!bh) {
1144                 status = -ENOMEM;
1145                 mlog_errno(status);
1146                 goto out;
1147         }
1148         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1149
1150         /* Local quota info, chunk header and the new block we initialize */
1151         handle = ocfs2_start_trans(OCFS2_SB(sb),
1152                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1153                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1154         if (IS_ERR(handle)) {
1155                 status = PTR_ERR(handle);
1156                 mlog_errno(status);
1157                 goto out;
1158         }
1159         /* Zero created block */
1160         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1161                                  OCFS2_JOURNAL_ACCESS_CREATE);
1162         if (status < 0) {
1163                 mlog_errno(status);
1164                 goto out_trans;
1165         }
1166         lock_buffer(bh);
1167         memset(bh->b_data, 0, sb->s_blocksize);
1168         unlock_buffer(bh);
1169         ocfs2_journal_dirty(handle, bh);
1170
1171         /* Update chunk header */
1172         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1173                                          chunk->qc_headerbh,
1174                                  OCFS2_JOURNAL_ACCESS_WRITE);
1175         if (status < 0) {
1176                 mlog_errno(status);
1177                 goto out_trans;
1178         }
1179
1180         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1181         lock_buffer(chunk->qc_headerbh);
1182         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1183         unlock_buffer(chunk->qc_headerbh);
1184         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1185
1186         /* Update file header */
1187         oinfo->dqi_blocks++;
1188         status = ocfs2_local_write_info(sb, type);
1189         if (status < 0) {
1190                 mlog_errno(status);
1191                 goto out_trans;
1192         }
1193
1194         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1195         if (status < 0) {
1196                 mlog_errno(status);
1197                 goto out;
1198         }
1199         *offset = chunk_blocks * epb;
1200         return chunk;
1201 out_trans:
1202         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1203 out:
1204         return ERR_PTR(status);
1205 }
1206
1207 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1208 {
1209         int *offset = private;
1210         struct ocfs2_local_disk_chunk *dchunk;
1211
1212         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1213         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1214         le32_add_cpu(&dchunk->dqc_free, -1);
1215 }
1216
1217 /* Create dquot in the local file for given id */
1218 int ocfs2_create_local_dquot(struct dquot *dquot)
1219 {
1220         struct super_block *sb = dquot->dq_sb;
1221         int type = dquot->dq_id.type;
1222         struct inode *lqinode = sb_dqopt(sb)->files[type];
1223         struct ocfs2_quota_chunk *chunk;
1224         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1225         int offset;
1226         int status;
1227         u64 pcount;
1228
1229         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1230         chunk = ocfs2_find_free_entry(sb, type, &offset);
1231         if (!chunk) {
1232                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1233                 if (IS_ERR(chunk)) {
1234                         status = PTR_ERR(chunk);
1235                         goto out;
1236                 }
1237         } else if (IS_ERR(chunk)) {
1238                 status = PTR_ERR(chunk);
1239                 goto out;
1240         }
1241         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1242         od->dq_chunk = chunk;
1243         status = ocfs2_extent_map_get_blocks(lqinode,
1244                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1245                                      &od->dq_local_phys_blk,
1246                                      &pcount,
1247                                      NULL);
1248
1249         /* Initialize dquot structure on disk */
1250         status = ocfs2_local_write_dquot(dquot);
1251         if (status < 0) {
1252                 mlog_errno(status);
1253                 goto out;
1254         }
1255
1256         /* Mark structure as allocated */
1257         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1258                                  &offset);
1259         if (status < 0) {
1260                 mlog_errno(status);
1261                 goto out;
1262         }
1263 out:
1264         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1265         return status;
1266 }
1267
1268 /*
1269  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1270  * already started a transaction and written all changes to global quota file
1271  */
1272 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1273 {
1274         int status;
1275         int type = dquot->dq_id.type;
1276         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1277         struct super_block *sb = dquot->dq_sb;
1278         struct ocfs2_local_disk_chunk *dchunk;
1279         int offset;
1280
1281         status = ocfs2_journal_access_dq(handle,
1282                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1283                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1284         if (status < 0) {
1285                 mlog_errno(status);
1286                 goto out;
1287         }
1288         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1289                                              od->dq_local_off);
1290         dchunk = (struct ocfs2_local_disk_chunk *)
1291                         (od->dq_chunk->qc_headerbh->b_data);
1292         /* Mark structure as freed */
1293         lock_buffer(od->dq_chunk->qc_headerbh);
1294         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1295         le32_add_cpu(&dchunk->dqc_free, 1);
1296         unlock_buffer(od->dq_chunk->qc_headerbh);
1297         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1298
1299 out:
1300         return status;
1301 }
1302
1303 static const struct quota_format_ops ocfs2_format_ops = {
1304         .check_quota_file       = ocfs2_local_check_quota_file,
1305         .read_file_info         = ocfs2_local_read_info,
1306         .write_file_info        = ocfs2_global_write_info,
1307         .free_file_info         = ocfs2_local_free_info,
1308 };
1309
1310 struct quota_format_type ocfs2_quota_format = {
1311         .qf_fmt_id = QFMT_OCFS2,
1312         .qf_ops = &ocfs2_format_ops,
1313         .qf_owner = THIS_MODULE
1314 };