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 #define MLOG_MASK_PREFIX ML_QUOTA
  12 #include <cluster/masklog.h>
  13
  14 #include "ocfs2_fs.h"
  15 #include "ocfs2.h"
  16 #include "inode.h"
  17 #include "alloc.h"
  18 #include "file.h"
  19 #include "buffer_head_io.h"
  20 #include "journal.h"
  21 #include "sysfile.h"
  22 #include "dlmglue.h"
  23 #include "quota.h"
  24 #include "uptodate.h"
  25 #include "super.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 /* Compute block number from given offset */
  77 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
  78 {
  79         return off >> sb->s_blocksize_bits;
  80 }
  81
  82 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
  83 {
  84         return off & ((1 << sb->s_blocksize_bits) - 1);
  85 }
  86
  87 /* Compute offset in the chunk of a structure with the given offset */
  88 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
  89 {
  90         int epb = ol_quota_entries_per_block(sb);
  91
  92         return ((off >> sb->s_blocksize_bits) -
  93                         ol_quota_chunk_block(sb, c) - 1) * epb
  94                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
  95                  sizeof(struct ocfs2_local_disk_dqblk);
  96 }
  97
  98 /* Write bufferhead into the fs */
  99 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
 100                 void (*modify)(struct buffer_head *, void *), void *private)
 101 {
 102         struct super_block *sb = inode->i_sb;
 103         handle_t *handle;
 104         int status;
 105
 106         handle = ocfs2_start_trans(OCFS2_SB(sb),
 107                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 108         if (IS_ERR(handle)) {
 109                 status = PTR_ERR(handle);
 110                 mlog_errno(status);
 111                 return status;
 112         }
 113         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
 114                                          OCFS2_JOURNAL_ACCESS_WRITE);
 115         if (status < 0) {
 116                 mlog_errno(status);
 117                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
 118                 return status;
 119         }
 120         lock_buffer(bh);
 121         modify(bh, private);
 122         unlock_buffer(bh);
 123         ocfs2_journal_dirty(handle, bh);
 124
 125         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
 126         if (status < 0) {
 127                 mlog_errno(status);
 128                 return status;
 129         }
 130         return 0;
 131 }
 132
 133 /*
 134  * Read quota block from a given logical offset.
 135  *
 136  * This function acquires ip_alloc_sem and thus it must not be called with a
 137  * transaction started.
 138  */
 139 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
 140                                   struct buffer_head **bh)
 141 {
 142         int rc = 0;
 143         struct buffer_head *tmp = *bh;
 144
 145         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
 146                 ocfs2_error(inode->i_sb,
 147                             "Quota file %llu is probably corrupted! Requested "
 148                             "to read block %Lu but file has size only %Lu\n",
 149                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
 150                             (unsigned long long)v_block,
 151                             (unsigned long long)i_size_read(inode));
 152                 return -EIO;
 153         }
 154         rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
 155                                     ocfs2_validate_quota_block);
 156         if (rc)
 157                 mlog_errno(rc);
 158
 159         /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
 160         if (!rc && !*bh)
 161                 *bh = tmp;
 162
 163         return rc;
 164 }
 165
 166 /* Check whether we understand format of quota files */
 167 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
 168 {
 169         unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 170         unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 171         unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 172         unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 173         unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
 174                                         GROUP_QUOTA_SYSTEM_INODE };
 175         struct buffer_head *bh = NULL;
 176         struct inode *linode = sb_dqopt(sb)->files[type];
 177         struct inode *ginode = NULL;
 178         struct ocfs2_disk_dqheader *dqhead;
 179         int status, ret = 0;
 180
 181         /* First check whether we understand local quota file */
 182         status = ocfs2_read_quota_block(linode, 0, &bh);
 183         if (status) {
 184                 mlog_errno(status);
 185                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
 186                         type);
 187                 goto out_err;
 188         }
 189         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 190         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
 191                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
 192                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
 193                         lmagics[type], type);
 194                 goto out_err;
 195         }
 196         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
 197                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
 198                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
 199                         lversions[type], type);
 200                 goto out_err;
 201         }
 202         brelse(bh);
 203         bh = NULL;
 204
 205         /* Next check whether we understand global quota file */
 206         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
 207                                                 OCFS2_INVALID_SLOT);
 208         if (!ginode) {
 209                 mlog(ML_ERROR, "cannot get global quota file inode "
 210                                 "(type=%d)\n", type);
 211                 goto out_err;
 212         }
 213         /* Since the header is read only, we don't care about locking */
 214         status = ocfs2_read_quota_block(ginode, 0, &bh);
 215         if (status) {
 216                 mlog_errno(status);
 217                 mlog(ML_ERROR, "failed to read global quota file header "
 218                                 "(type=%d)\n", type);
 219                 goto out_err;
 220         }
 221         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 222         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
 223                 mlog(ML_ERROR, "global quota file magic does not match "
 224                         "(%u != %u), type=%d\n",
 225                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
 226                 goto out_err;
 227         }
 228         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
 229                 mlog(ML_ERROR, "global quota file version does not match "
 230                         "(%u != %u), type=%d\n",
 231                         le32_to_cpu(dqhead->dqh_version), gversions[type],
 232                         type);
 233                 goto out_err;
 234         }
 235
 236         ret = 1;
 237 out_err:
 238         brelse(bh);
 239         iput(ginode);
 240         return ret;
 241 }
 242
 243 /* Release given list of quota file chunks */
 244 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
 245 {
 246         struct ocfs2_quota_chunk *pos, *next;
 247
 248         list_for_each_entry_safe(pos, next, head, qc_chunk) {
 249                 list_del(&pos->qc_chunk);
 250                 brelse(pos->qc_headerbh);
 251                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
 252         }
 253 }
 254
 255 /* Load quota bitmaps into memory */
 256 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
 257                         struct ocfs2_local_disk_dqinfo *ldinfo,
 258                         struct list_head *head)
 259 {
 260         struct ocfs2_quota_chunk *newchunk;
 261         int i, status;
 262
 263         INIT_LIST_HEAD(head);
 264         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
 265                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 266                 if (!newchunk) {
 267                         ocfs2_release_local_quota_bitmaps(head);
 268                         return -ENOMEM;
 269                 }
 270                 newchunk->qc_num = i;
 271                 newchunk->qc_headerbh = NULL;
 272                 status = ocfs2_read_quota_block(inode,
 273                                 ol_quota_chunk_block(inode->i_sb, i),
 274                                 &newchunk->qc_headerbh);
 275                 if (status) {
 276                         mlog_errno(status);
 277                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
 278                         ocfs2_release_local_quota_bitmaps(head);
 279                         return status;
 280                 }
 281                 list_add_tail(&newchunk->qc_chunk, head);
 282         }
 283         return 0;
 284 }
 285
 286 static void olq_update_info(struct buffer_head *bh, void *private)
 287 {
 288         struct mem_dqinfo *info = private;
 289         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 290         struct ocfs2_local_disk_dqinfo *ldinfo;
 291
 292         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 293                                                 OCFS2_LOCAL_INFO_OFF);
 294         spin_lock(&dq_data_lock);
 295         ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
 296         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
 297         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
 298         spin_unlock(&dq_data_lock);
 299 }
 300
 301 static int ocfs2_add_recovery_chunk(struct super_block *sb,
 302                                     struct ocfs2_local_disk_chunk *dchunk,
 303                                     int chunk,
 304                                     struct list_head *head)
 305 {
 306         struct ocfs2_recovery_chunk *rc;
 307
 308         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
 309         if (!rc)
 310                 return -ENOMEM;
 311         rc->rc_chunk = chunk;
 312         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
 313         if (!rc->rc_bitmap) {
 314                 kfree(rc);
 315                 return -ENOMEM;
 316         }
 317         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
 318                (ol_chunk_entries(sb) + 7) >> 3);
 319         list_add_tail(&rc->rc_list, head);
 320         return 0;
 321 }
 322
 323 static void free_recovery_list(struct list_head *head)
 324 {
 325         struct ocfs2_recovery_chunk *next;
 326         struct ocfs2_recovery_chunk *rchunk;
 327
 328         list_for_each_entry_safe(rchunk, next, head, rc_list) {
 329                 list_del(&rchunk->rc_list);
 330                 kfree(rchunk->rc_bitmap);
 331                 kfree(rchunk);
 332         }
 333 }
 334
 335 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
 336 {
 337         int type;
 338
 339         for (type = 0; type < MAXQUOTAS; type++)
 340                 free_recovery_list(&(rec->r_list[type]));
 341         kfree(rec);
 342 }
 343
 344 /* Load entries in our quota file we have to recover*/
 345 static int ocfs2_recovery_load_quota(struct inode *lqinode,
 346                                      struct ocfs2_local_disk_dqinfo *ldinfo,
 347                                      int type,
 348                                      struct list_head *head)
 349 {
 350         struct super_block *sb = lqinode->i_sb;
 351         struct buffer_head *hbh;
 352         struct ocfs2_local_disk_chunk *dchunk;
 353         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
 354         int status = 0;
 355
 356         for (i = 0; i < chunks; i++) {
 357                 hbh = NULL;
 358                 status = ocfs2_read_quota_block(lqinode,
 359                                                 ol_quota_chunk_block(sb, i),
 360                                                 &hbh);
 361                 if (status) {
 362                         mlog_errno(status);
 363                         break;
 364                 }
 365                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 366                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
 367                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
 368                 brelse(hbh);
 369                 if (status < 0)
 370                         break;
 371         }
 372         if (status < 0)
 373                 free_recovery_list(head);
 374         return status;
 375 }
 376
 377 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
 378 {
 379         int type;
 380         struct ocfs2_quota_recovery *rec;
 381
 382         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
 383         if (!rec)
 384                 return NULL;
 385         for (type = 0; type < MAXQUOTAS; type++)
 386                 INIT_LIST_HEAD(&(rec->r_list[type]));
 387         return rec;
 388 }
 389
 390 /* Load information we need for quota recovery into memory */
 391 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
 392                                                 struct ocfs2_super *osb,
 393                                                 int slot_num)
 394 {
 395         unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 396                                             OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 397         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 398                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 399         struct super_block *sb = osb->sb;
 400         struct ocfs2_local_disk_dqinfo *ldinfo;
 401         struct inode *lqinode;
 402         struct buffer_head *bh;
 403         int type;
 404         int status = 0;
 405         struct ocfs2_quota_recovery *rec;
 406
 407         mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
 408         rec = ocfs2_alloc_quota_recovery();
 409         if (!rec)
 410                 return ERR_PTR(-ENOMEM);
 411         /* First init... */
 412
 413         for (type = 0; type < MAXQUOTAS; type++) {
 414                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 415                         continue;
 416                 /* At this point, journal of the slot is already replayed so
 417                  * we can trust metadata and data of the quota file */
 418                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 419                 if (!lqinode) {
 420                         status = -ENOENT;
 421                         goto out;
 422                 }
 423                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 424                                                OCFS2_META_LOCK_RECOVERY);
 425                 if (status < 0) {
 426                         mlog_errno(status);
 427                         goto out_put;
 428                 }
 429                 /* Now read local header */
 430                 bh = NULL;
 431                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 432                 if (status) {
 433                         mlog_errno(status);
 434                         mlog(ML_ERROR, "failed to read quota file info header "
 435                                 "(slot=%d type=%d)\n", slot_num, type);
 436                         goto out_lock;
 437                 }
 438                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 439                                                         OCFS2_LOCAL_INFO_OFF);
 440                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 441                                                    &rec->r_list[type]);
 442                 brelse(bh);
 443 out_lock:
 444                 ocfs2_inode_unlock(lqinode, 1);
 445 out_put:
 446                 iput(lqinode);
 447                 if (status < 0)
 448                         break;
 449         }
 450 out:
 451         if (status < 0) {
 452                 ocfs2_free_quota_recovery(rec);
 453                 rec = ERR_PTR(status);
 454         }
 455         return rec;
 456 }
 457
 458 /* Sync changes in local quota file into global quota file and
 459  * reinitialize local quota file.
 460  * The function expects local quota file to be already locked and
 461  * dqonoff_mutex locked. */
 462 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 463                                           int type,
 464                                           struct ocfs2_quota_recovery *rec)
 465 {
 466         struct super_block *sb = lqinode->i_sb;
 467         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 468         struct ocfs2_local_disk_chunk *dchunk;
 469         struct ocfs2_local_disk_dqblk *dqblk;
 470         struct dquot *dquot;
 471         handle_t *handle;
 472         struct buffer_head *hbh = NULL, *qbh = NULL;
 473         int status = 0;
 474         int bit, chunk;
 475         struct ocfs2_recovery_chunk *rchunk, *next;
 476         qsize_t spacechange, inodechange;
 477
 478         mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
 479
 480         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 481                 chunk = rchunk->rc_chunk;
 482                 hbh = NULL;
 483                 status = ocfs2_read_quota_block(lqinode,
 484                                                 ol_quota_chunk_block(sb, chunk),
 485                                                 &hbh);
 486                 if (status) {
 487                         mlog_errno(status);
 488                         break;
 489                 }
 490                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 491                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 492                         qbh = NULL;
 493                         status = ocfs2_read_quota_block(lqinode,
 494                                                 ol_dqblk_block(sb, chunk, bit),
 495                                                 &qbh);
 496                         if (status) {
 497                                 mlog_errno(status);
 498                                 break;
 499                         }
 500                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 501                                 ol_dqblk_block_off(sb, chunk, bit));
 502                         dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
 503                         if (!dquot) {
 504                                 status = -EIO;
 505                                 mlog(ML_ERROR, "Failed to get quota structure "
 506                                      "for id %u, type %d. Cannot finish quota "
 507                                      "file recovery.\n",
 508                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
 509                                      type);
 510                                 goto out_put_bh;
 511                         }
 512                         status = ocfs2_lock_global_qf(oinfo, 1);
 513                         if (status < 0) {
 514                                 mlog_errno(status);
 515                                 goto out_put_dquot;
 516                         }
 517
 518                         handle = ocfs2_start_trans(OCFS2_SB(sb),
 519                                                    OCFS2_QSYNC_CREDITS);
 520                         if (IS_ERR(handle)) {
 521                                 status = PTR_ERR(handle);
 522                                 mlog_errno(status);
 523                                 goto out_drop_lock;
 524                         }
 525                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 526                         spin_lock(&dq_data_lock);
 527                         /* Add usage from quota entry into quota changes
 528                          * of our node. Auxiliary variables are important
 529                          * due to signedness */
 530                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 531                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 532                         dquot->dq_dqb.dqb_curspace += spacechange;
 533                         dquot->dq_dqb.dqb_curinodes += inodechange;
 534                         spin_unlock(&dq_data_lock);
 535                         /* We want to drop reference held by the crashed
 536                          * node. Since we have our own reference we know
 537                          * global structure actually won't be freed. */
 538                         status = ocfs2_global_release_dquot(dquot);
 539                         if (status < 0) {
 540                                 mlog_errno(status);
 541                                 goto out_commit;
 542                         }
 543                         /* Release local quota file entry */
 544                         status = ocfs2_journal_access_dq(handle,
 545                                         INODE_CACHE(lqinode),
 546                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 547                         if (status < 0) {
 548                                 mlog_errno(status);
 549                                 goto out_commit;
 550                         }
 551                         lock_buffer(qbh);
 552                         WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
 553                         ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
 554                         le32_add_cpu(&dchunk->dqc_free, 1);
 555                         unlock_buffer(qbh);
 556                         ocfs2_journal_dirty(handle, qbh);
 557 out_commit:
 558                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 559                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
 560 out_drop_lock:
 561                         ocfs2_unlock_global_qf(oinfo, 1);
 562 out_put_dquot:
 563                         dqput(dquot);
 564 out_put_bh:
 565                         brelse(qbh);
 566                         if (status < 0)
 567                                 break;
 568                 }
 569                 brelse(hbh);
 570                 list_del(&rchunk->rc_list);
 571                 kfree(rchunk->rc_bitmap);
 572                 kfree(rchunk);
 573                 if (status < 0)
 574                         break;
 575         }
 576         if (status < 0)
 577                 free_recovery_list(&(rec->r_list[type]));
 578         mlog_exit(status);
 579         return status;
 580 }
 581
 582 /* Recover local quota files for given node different from us */
 583 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 584                                 struct ocfs2_quota_recovery *rec,
 585                                 int slot_num)
 586 {
 587         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 588                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 589         struct super_block *sb = osb->sb;
 590         struct ocfs2_local_disk_dqinfo *ldinfo;
 591         struct buffer_head *bh;
 592         handle_t *handle;
 593         int type;
 594         int status = 0;
 595         struct inode *lqinode;
 596         unsigned int flags;
 597
 598         mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
 599         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 600         for (type = 0; type < MAXQUOTAS; type++) {
 601                 if (list_empty(&(rec->r_list[type])))
 602                         continue;
 603                 mlog(0, "Recovering quota in slot %d\n", slot_num);
 604                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 605                 if (!lqinode) {
 606                         status = -ENOENT;
 607                         goto out;
 608                 }
 609                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 610                                                        OCFS2_META_LOCK_NOQUEUE);
 611                 /* Someone else is holding the lock? Then he must be
 612                  * doing the recovery. Just skip the file... */
 613                 if (status == -EAGAIN) {
 614                         mlog(ML_NOTICE, "skipping quota recovery for slot %d "
 615                              "because quota file is locked.\n", slot_num);
 616                         status = 0;
 617                         goto out_put;
 618                 } else if (status < 0) {
 619                         mlog_errno(status);
 620                         goto out_put;
 621                 }
 622                 /* Now read local header */
 623                 bh = NULL;
 624                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 625                 if (status) {
 626                         mlog_errno(status);
 627                         mlog(ML_ERROR, "failed to read quota file info header "
 628                                 "(slot=%d type=%d)\n", slot_num, type);
 629                         goto out_lock;
 630                 }
 631                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 632                                                         OCFS2_LOCAL_INFO_OFF);
 633                 /* Is recovery still needed? */
 634                 flags = le32_to_cpu(ldinfo->dqi_flags);
 635                 if (!(flags & OLQF_CLEAN))
 636                         status = ocfs2_recover_local_quota_file(lqinode,
 637                                                                 type,
 638                                                                 rec);
 639                 /* We don't want to mark file as clean when it is actually
 640                  * active */
 641                 if (slot_num == osb->slot_num)
 642                         goto out_bh;
 643                 /* Mark quota file as clean if we are recovering quota file of
 644                  * some other node. */
 645                 handle = ocfs2_start_trans(osb,
 646                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 647                 if (IS_ERR(handle)) {
 648                         status = PTR_ERR(handle);
 649                         mlog_errno(status);
 650                         goto out_bh;
 651                 }
 652                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 653                                                  bh,
 654                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 655                 if (status < 0) {
 656                         mlog_errno(status);
 657                         goto out_trans;
 658                 }
 659                 lock_buffer(bh);
 660                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 661                 unlock_buffer(bh);
 662                 ocfs2_journal_dirty(handle, bh);
 663 out_trans:
 664                 ocfs2_commit_trans(osb, handle);
 665 out_bh:
 666                 brelse(bh);
 667 out_lock:
 668                 ocfs2_inode_unlock(lqinode, 1);
 669 out_put:
 670                 iput(lqinode);
 671                 if (status < 0)
 672                         break;
 673         }
 674 out:
 675         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 676         kfree(rec);
 677         return status;
 678 }
 679
 680 /* Read information header from quota file */
 681 static int ocfs2_local_read_info(struct super_block *sb, int type)
 682 {
 683         struct ocfs2_local_disk_dqinfo *ldinfo;
 684         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 685         struct ocfs2_mem_dqinfo *oinfo;
 686         struct inode *lqinode = sb_dqopt(sb)->files[type];
 687         int status;
 688         struct buffer_head *bh = NULL;
 689         struct ocfs2_quota_recovery *rec;
 690         int locked = 0;
 691
 692         /* We don't need the lock and we have to acquire quota file locks
 693          * which will later depend on this lock */
 694         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 695         info->dqi_maxblimit = 0x7fffffffffffffffLL;
 696         info->dqi_maxilimit = 0x7fffffffffffffffLL;
 697         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 698         if (!oinfo) {
 699                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 700                                " info.");
 701                 goto out_err;
 702         }
 703         info->dqi_priv = oinfo;
 704         oinfo->dqi_type = type;
 705         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 706         oinfo->dqi_rec = NULL;
 707         oinfo->dqi_lqi_bh = NULL;
 708         oinfo->dqi_libh = NULL;
 709
 710         status = ocfs2_global_read_info(sb, type);
 711         if (status < 0)
 712                 goto out_err;
 713
 714         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 715         if (status < 0) {
 716                 mlog_errno(status);
 717                 goto out_err;
 718         }
 719         locked = 1;
 720
 721         /* Now read local header */
 722         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 723         if (status) {
 724                 mlog_errno(status);
 725                 mlog(ML_ERROR, "failed to read quota file info header "
 726                         "(type=%d)\n", type);
 727                 goto out_err;
 728         }
 729         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 730                                                 OCFS2_LOCAL_INFO_OFF);
 731         info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 732         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 733         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 734         oinfo->dqi_libh = bh;
 735
 736         /* We crashed when using local quota file? */
 737         if (!(info->dqi_flags & OLQF_CLEAN)) {
 738                 rec = OCFS2_SB(sb)->quota_rec;
 739                 if (!rec) {
 740                         rec = ocfs2_alloc_quota_recovery();
 741                         if (!rec) {
 742                                 status = -ENOMEM;
 743                                 mlog_errno(status);
 744                                 goto out_err;
 745                         }
 746                         OCFS2_SB(sb)->quota_rec = rec;
 747                 }
 748
 749                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 750                                                    &rec->r_list[type]);
 751                 if (status < 0) {
 752                         mlog_errno(status);
 753                         goto out_err;
 754                 }
 755         }
 756
 757         status = ocfs2_load_local_quota_bitmaps(lqinode,
 758                                                 ldinfo,
 759                                                 &oinfo->dqi_chunk);
 760         if (status < 0) {
 761                 mlog_errno(status);
 762                 goto out_err;
 763         }
 764
 765         /* Now mark quota file as used */
 766         info->dqi_flags &= ~OLQF_CLEAN;
 767         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 768         if (status < 0) {
 769                 mlog_errno(status);
 770                 goto out_err;
 771         }
 772
 773         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 774         return 0;
 775 out_err:
 776         if (oinfo) {
 777                 iput(oinfo->dqi_gqinode);
 778                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 779                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 780                 brelse(oinfo->dqi_lqi_bh);
 781                 if (locked)
 782                         ocfs2_inode_unlock(lqinode, 1);
 783                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 784                 kfree(oinfo);
 785         }
 786         brelse(bh);
 787         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 788         return -1;
 789 }
 790
 791 /* Write local info to quota file */
 792 static int ocfs2_local_write_info(struct super_block *sb, int type)
 793 {
 794         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 795         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 796                                                 ->dqi_libh;
 797         int status;
 798
 799         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 800                                  info);
 801         if (status < 0) {
 802                 mlog_errno(status);
 803                 return -1;
 804         }
 805
 806         return 0;
 807 }
 808
 809 /* Release info from memory */
 810 static int ocfs2_local_free_info(struct super_block *sb, int type)
 811 {
 812         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 813         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 814         struct ocfs2_quota_chunk *chunk;
 815         struct ocfs2_local_disk_chunk *dchunk;
 816         int mark_clean = 1, len;
 817         int status;
 818
 819         iput(oinfo->dqi_gqinode);
 820         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 821         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 822         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 823                 dchunk = (struct ocfs2_local_disk_chunk *)
 824                                         (chunk->qc_headerbh->b_data);
 825                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 826                         len = ol_chunk_entries(sb);
 827                 } else {
 828                         len = (oinfo->dqi_blocks -
 829                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 830                               * ol_quota_entries_per_block(sb);
 831                 }
 832                 /* Not all entries free? Bug! */
 833                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 834                         mlog(ML_ERROR, "releasing quota file with used "
 835                                         "entries (type=%d)\n", type);
 836                         mark_clean = 0;
 837                 }
 838         }
 839         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 840
 841         /* dqonoff_mutex protects us against racing with recovery thread... */
 842         if (oinfo->dqi_rec) {
 843                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 844                 mark_clean = 0;
 845         }
 846
 847         if (!mark_clean)
 848                 goto out;
 849
 850         /* Mark local file as clean */
 851         info->dqi_flags |= OLQF_CLEAN;
 852         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 853                                  oinfo->dqi_libh,
 854                                  olq_update_info,
 855                                  info);
 856         if (status < 0) {
 857                 mlog_errno(status);
 858                 goto out;
 859         }
 860
 861 out:
 862         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 863         brelse(oinfo->dqi_libh);
 864         brelse(oinfo->dqi_lqi_bh);
 865         kfree(oinfo);
 866         return 0;
 867 }
 868
 869 static void olq_set_dquot(struct buffer_head *bh, void *private)
 870 {
 871         struct ocfs2_dquot *od = private;
 872         struct ocfs2_local_disk_dqblk *dqblk;
 873         struct super_block *sb = od->dq_dquot.dq_sb;
 874
 875         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 876                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 877
 878         dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
 879         spin_lock(&dq_data_lock);
 880         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 881                                           od->dq_origspace);
 882         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 883                                           od->dq_originodes);
 884         spin_unlock(&dq_data_lock);
 885         mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
 886              od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
 887              (long long)le64_to_cpu(dqblk->dqb_inodemod));
 888 }
 889
 890 /* Write dquot to local quota file */
 891 int ocfs2_local_write_dquot(struct dquot *dquot)
 892 {
 893         struct super_block *sb = dquot->dq_sb;
 894         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 895         struct buffer_head *bh;
 896         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
 897         int status;
 898
 899         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 900                                              &bh);
 901         if (status) {
 902                 mlog_errno(status);
 903                 goto out;
 904         }
 905         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 906         if (status < 0) {
 907                 mlog_errno(status);
 908                 goto out;
 909         }
 910 out:
 911         brelse(bh);
 912         return status;
 913 }
 914
 915 /* Find free entry in local quota file */
 916 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 917                                                        int type,
 918                                                        int *offset)
 919 {
 920         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 921         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 922         struct ocfs2_quota_chunk *chunk;
 923         struct ocfs2_local_disk_chunk *dchunk;
 924         int found = 0, len;
 925
 926         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 927                 dchunk = (struct ocfs2_local_disk_chunk *)
 928                                                 chunk->qc_headerbh->b_data;
 929                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
 930                         found = 1;
 931                         break;
 932                 }
 933         }
 934         if (!found)
 935                 return NULL;
 936
 937         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 938                 len = ol_chunk_entries(sb);
 939         } else {
 940                 len = (oinfo->dqi_blocks -
 941                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 942                       * ol_quota_entries_per_block(sb);
 943         }
 944
 945         found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
 946         /* We failed? */
 947         if (found == len) {
 948                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 949                      " entries free (type=%d)\n", chunk->qc_num,
 950                      le32_to_cpu(dchunk->dqc_free), type);
 951                 return ERR_PTR(-EIO);
 952         }
 953         *offset = found;
 954         return chunk;
 955 }
 956
 957 /* Add new chunk to the local quota file */
 958 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 959                                                         struct super_block *sb,
 960                                                         int type,
 961                                                         int *offset)
 962 {
 963         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 964         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 965         struct inode *lqinode = sb_dqopt(sb)->files[type];
 966         struct ocfs2_quota_chunk *chunk = NULL;
 967         struct ocfs2_local_disk_chunk *dchunk;
 968         int status;
 969         handle_t *handle;
 970         struct buffer_head *bh = NULL, *dbh = NULL;
 971         u64 p_blkno;
 972
 973         /* We are protected by dqio_sem so no locking needed */
 974         status = ocfs2_extend_no_holes(lqinode, NULL,
 975                                        lqinode->i_size + 2 * sb->s_blocksize,
 976                                        lqinode->i_size);
 977         if (status < 0) {
 978                 mlog_errno(status);
 979                 goto out;
 980         }
 981         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 982                                           lqinode->i_size + 2 * sb->s_blocksize);
 983         if (status < 0) {
 984                 mlog_errno(status);
 985                 goto out;
 986         }
 987
 988         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 989         if (!chunk) {
 990                 status = -ENOMEM;
 991                 mlog_errno(status);
 992                 goto out;
 993         }
 994         /* Local quota info and two new blocks we initialize */
 995         handle = ocfs2_start_trans(OCFS2_SB(sb),
 996                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
 997                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 998         if (IS_ERR(handle)) {
 999                 status = PTR_ERR(handle);
1000                 mlog_errno(status);
1001                 goto out;
1002         }
1003
1004         /* Initialize chunk header */
1005         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1006                                              &p_blkno, NULL, NULL);
1007         if (status < 0) {
1008                 mlog_errno(status);
1009                 goto out_trans;
1010         }
1011         bh = sb_getblk(sb, p_blkno);
1012         if (!bh) {
1013                 status = -ENOMEM;
1014                 mlog_errno(status);
1015                 goto out_trans;
1016         }
1017         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1018         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1019         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1020                                          OCFS2_JOURNAL_ACCESS_CREATE);
1021         if (status < 0) {
1022                 mlog_errno(status);
1023                 goto out_trans;
1024         }
1025         lock_buffer(bh);
1026         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1027         memset(dchunk->dqc_bitmap, 0,
1028                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1029                OCFS2_QBLK_RESERVED_SPACE);
1030         unlock_buffer(bh);
1031         ocfs2_journal_dirty(handle, bh);
1032
1033         /* Initialize new block with structures */
1034         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1035                                              &p_blkno, NULL, NULL);
1036         if (status < 0) {
1037                 mlog_errno(status);
1038                 goto out_trans;
1039         }
1040         dbh = sb_getblk(sb, p_blkno);
1041         if (!dbh) {
1042                 status = -ENOMEM;
1043                 mlog_errno(status);
1044                 goto out_trans;
1045         }
1046         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1047         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1048                                          OCFS2_JOURNAL_ACCESS_CREATE);
1049         if (status < 0) {
1050                 mlog_errno(status);
1051                 goto out_trans;
1052         }
1053         lock_buffer(dbh);
1054         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1055         unlock_buffer(dbh);
1056         ocfs2_journal_dirty(handle, dbh);
1057
1058         /* Update local quotafile info */
1059         oinfo->dqi_blocks += 2;
1060         oinfo->dqi_chunks++;
1061         status = ocfs2_local_write_info(sb, type);
1062         if (status < 0) {
1063                 mlog_errno(status);
1064                 goto out_trans;
1065         }
1066         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1067         if (status < 0) {
1068                 mlog_errno(status);
1069                 goto out;
1070         }
1071
1072         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1073         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1074                                    struct ocfs2_quota_chunk,
1075                                    qc_chunk)->qc_num + 1;
1076         chunk->qc_headerbh = bh;
1077         *offset = 0;
1078         return chunk;
1079 out_trans:
1080         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1081 out:
1082         brelse(bh);
1083         brelse(dbh);
1084         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1085         return ERR_PTR(status);
1086 }
1087
1088 /* Find free entry in local quota file */
1089 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1090                                                        struct super_block *sb,
1091                                                        int type,
1092                                                        int *offset)
1093 {
1094         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1095         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1096         struct ocfs2_quota_chunk *chunk;
1097         struct inode *lqinode = sb_dqopt(sb)->files[type];
1098         struct ocfs2_local_disk_chunk *dchunk;
1099         int epb = ol_quota_entries_per_block(sb);
1100         unsigned int chunk_blocks;
1101         struct buffer_head *bh;
1102         u64 p_blkno;
1103         int status;
1104         handle_t *handle;
1105
1106         if (list_empty(&oinfo->dqi_chunk))
1107                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1108         /* Is the last chunk full? */
1109         chunk = list_entry(oinfo->dqi_chunk.prev,
1110                         struct ocfs2_quota_chunk, qc_chunk);
1111         chunk_blocks = oinfo->dqi_blocks -
1112                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1113         if (ol_chunk_blocks(sb) == chunk_blocks)
1114                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1115
1116         /* We are protected by dqio_sem so no locking needed */
1117         status = ocfs2_extend_no_holes(lqinode, NULL,
1118                                        lqinode->i_size + sb->s_blocksize,
1119                                        lqinode->i_size);
1120         if (status < 0) {
1121                 mlog_errno(status);
1122                 goto out;
1123         }
1124         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1125                                           lqinode->i_size + sb->s_blocksize);
1126         if (status < 0) {
1127                 mlog_errno(status);
1128                 goto out;
1129         }
1130
1131         /* Get buffer from the just added block */
1132         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1133                                              &p_blkno, NULL, NULL);
1134         if (status < 0) {
1135                 mlog_errno(status);
1136                 goto out;
1137         }
1138         bh = sb_getblk(sb, p_blkno);
1139         if (!bh) {
1140                 status = -ENOMEM;
1141                 mlog_errno(status);
1142                 goto out;
1143         }
1144         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1145
1146         /* Local quota info, chunk header and the new block we initialize */
1147         handle = ocfs2_start_trans(OCFS2_SB(sb),
1148                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1149                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1150         if (IS_ERR(handle)) {
1151                 status = PTR_ERR(handle);
1152                 mlog_errno(status);
1153                 goto out;
1154         }
1155         /* Zero created block */
1156         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1157                                  OCFS2_JOURNAL_ACCESS_CREATE);
1158         if (status < 0) {
1159                 mlog_errno(status);
1160                 goto out_trans;
1161         }
1162         lock_buffer(bh);
1163         memset(bh->b_data, 0, sb->s_blocksize);
1164         unlock_buffer(bh);
1165         ocfs2_journal_dirty(handle, bh);
1166
1167         /* Update chunk header */
1168         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1169                                          chunk->qc_headerbh,
1170                                  OCFS2_JOURNAL_ACCESS_WRITE);
1171         if (status < 0) {
1172                 mlog_errno(status);
1173                 goto out_trans;
1174         }
1175
1176         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1177         lock_buffer(chunk->qc_headerbh);
1178         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1179         unlock_buffer(chunk->qc_headerbh);
1180         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1181
1182         /* Update file header */
1183         oinfo->dqi_blocks++;
1184         status = ocfs2_local_write_info(sb, type);
1185         if (status < 0) {
1186                 mlog_errno(status);
1187                 goto out_trans;
1188         }
1189
1190         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1191         if (status < 0) {
1192                 mlog_errno(status);
1193                 goto out;
1194         }
1195         *offset = chunk_blocks * epb;
1196         return chunk;
1197 out_trans:
1198         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1199 out:
1200         return ERR_PTR(status);
1201 }
1202
1203 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1204 {
1205         int *offset = private;
1206         struct ocfs2_local_disk_chunk *dchunk;
1207
1208         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1209         ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1210         le32_add_cpu(&dchunk->dqc_free, -1);
1211 }
1212
1213 /* Create dquot in the local file for given id */
1214 int ocfs2_create_local_dquot(struct dquot *dquot)
1215 {
1216         struct super_block *sb = dquot->dq_sb;
1217         int type = dquot->dq_type;
1218         struct inode *lqinode = sb_dqopt(sb)->files[type];
1219         struct ocfs2_quota_chunk *chunk;
1220         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1221         int offset;
1222         int status;
1223         u64 pcount;
1224
1225         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1226         chunk = ocfs2_find_free_entry(sb, type, &offset);
1227         if (!chunk) {
1228                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1229                 if (IS_ERR(chunk)) {
1230                         status = PTR_ERR(chunk);
1231                         goto out;
1232                 }
1233         } else if (IS_ERR(chunk)) {
1234                 status = PTR_ERR(chunk);
1235                 goto out;
1236         }
1237         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1238         od->dq_chunk = chunk;
1239         status = ocfs2_extent_map_get_blocks(lqinode,
1240                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1241                                      &od->dq_local_phys_blk,
1242                                      &pcount,
1243                                      NULL);
1244
1245         /* Initialize dquot structure on disk */
1246         status = ocfs2_local_write_dquot(dquot);
1247         if (status < 0) {
1248                 mlog_errno(status);
1249                 goto out;
1250         }
1251
1252         /* Mark structure as allocated */
1253         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1254                                  &offset);
1255         if (status < 0) {
1256                 mlog_errno(status);
1257                 goto out;
1258         }
1259 out:
1260         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1261         return status;
1262 }
1263
1264 /*
1265  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1266  * already started a transaction and written all changes to global quota file
1267  */
1268 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1269 {
1270         int status;
1271         int type = dquot->dq_type;
1272         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1273         struct super_block *sb = dquot->dq_sb;
1274         struct ocfs2_local_disk_chunk *dchunk;
1275         int offset;
1276
1277         status = ocfs2_journal_access_dq(handle,
1278                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1279                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1280         if (status < 0) {
1281                 mlog_errno(status);
1282                 goto out;
1283         }
1284         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1285                                              od->dq_local_off);
1286         dchunk = (struct ocfs2_local_disk_chunk *)
1287                         (od->dq_chunk->qc_headerbh->b_data);
1288         /* Mark structure as freed */
1289         lock_buffer(od->dq_chunk->qc_headerbh);
1290         ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1291         le32_add_cpu(&dchunk->dqc_free, 1);
1292         unlock_buffer(od->dq_chunk->qc_headerbh);
1293         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1294
1295 out:
1296         /* Clear the read bit so that next time someone uses this
1297          * dquot he reads fresh info from disk and allocates local
1298          * dquot structure */
1299         clear_bit(DQ_READ_B, &dquot->dq_flags);
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 };