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 /* 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         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 408                "slot %u\n", osb->dev_str, slot_num);
 409
 410         rec = ocfs2_alloc_quota_recovery();
 411         if (!rec)
 412                 return ERR_PTR(-ENOMEM);
 413         /* First init... */
 414
 415         for (type = 0; type < MAXQUOTAS; type++) {
 416                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 417                         continue;
 418                 /* At this point, journal of the slot is already replayed so
 419                  * we can trust metadata and data of the quota file */
 420                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 421                 if (!lqinode) {
 422                         status = -ENOENT;
 423                         goto out;
 424                 }
 425                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 426                                                OCFS2_META_LOCK_RECOVERY);
 427                 if (status < 0) {
 428                         mlog_errno(status);
 429                         goto out_put;
 430                 }
 431                 /* Now read local header */
 432                 bh = NULL;
 433                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 434                 if (status) {
 435                         mlog_errno(status);
 436                         mlog(ML_ERROR, "failed to read quota file info header "
 437                                 "(slot=%d type=%d)\n", slot_num, type);
 438                         goto out_lock;
 439                 }
 440                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 441                                                         OCFS2_LOCAL_INFO_OFF);
 442                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 443                                                    &rec->r_list[type]);
 444                 brelse(bh);
 445 out_lock:
 446                 ocfs2_inode_unlock(lqinode, 1);
 447 out_put:
 448                 iput(lqinode);
 449                 if (status < 0)
 450                         break;
 451         }
 452 out:
 453         if (status < 0) {
 454                 ocfs2_free_quota_recovery(rec);
 455                 rec = ERR_PTR(status);
 456         }
 457         return rec;
 458 }
 459
 460 /* Sync changes in local quota file into global quota file and
 461  * reinitialize local quota file.
 462  * The function expects local quota file to be already locked and
 463  * dqonoff_mutex locked. */
 464 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 465                                           int type,
 466                                           struct ocfs2_quota_recovery *rec)
 467 {
 468         struct super_block *sb = lqinode->i_sb;
 469         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 470         struct ocfs2_local_disk_chunk *dchunk;
 471         struct ocfs2_local_disk_dqblk *dqblk;
 472         struct dquot *dquot;
 473         handle_t *handle;
 474         struct buffer_head *hbh = NULL, *qbh = NULL;
 475         int status = 0;
 476         int bit, chunk;
 477         struct ocfs2_recovery_chunk *rchunk, *next;
 478         qsize_t spacechange, inodechange;
 479
 480         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 481
 482         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 483                 chunk = rchunk->rc_chunk;
 484                 hbh = NULL;
 485                 status = ocfs2_read_quota_block(lqinode,
 486                                                 ol_quota_chunk_block(sb, chunk),
 487                                                 &hbh);
 488                 if (status) {
 489                         mlog_errno(status);
 490                         break;
 491                 }
 492                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 493                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 494                         qbh = NULL;
 495                         status = ocfs2_read_quota_block(lqinode,
 496                                                 ol_dqblk_block(sb, chunk, bit),
 497                                                 &qbh);
 498                         if (status) {
 499                                 mlog_errno(status);
 500                                 break;
 501                         }
 502                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 503                                 ol_dqblk_block_off(sb, chunk, bit));
 504                         dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
 505                         if (!dquot) {
 506                                 status = -EIO;
 507                                 mlog(ML_ERROR, "Failed to get quota structure "
 508                                      "for id %u, type %d. Cannot finish quota "
 509                                      "file recovery.\n",
 510                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
 511                                      type);
 512                                 goto out_put_bh;
 513                         }
 514                         status = ocfs2_lock_global_qf(oinfo, 1);
 515                         if (status < 0) {
 516                                 mlog_errno(status);
 517                                 goto out_put_dquot;
 518                         }
 519
 520                         handle = ocfs2_start_trans(OCFS2_SB(sb),
 521                                                    OCFS2_QSYNC_CREDITS);
 522                         if (IS_ERR(handle)) {
 523                                 status = PTR_ERR(handle);
 524                                 mlog_errno(status);
 525                                 goto out_drop_lock;
 526                         }
 527                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 528                         spin_lock(&dq_data_lock);
 529                         /* Add usage from quota entry into quota changes
 530                          * of our node. Auxiliary variables are important
 531                          * due to signedness */
 532                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 533                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 534                         dquot->dq_dqb.dqb_curspace += spacechange;
 535                         dquot->dq_dqb.dqb_curinodes += inodechange;
 536                         spin_unlock(&dq_data_lock);
 537                         /* We want to drop reference held by the crashed
 538                          * node. Since we have our own reference we know
 539                          * global structure actually won't be freed. */
 540                         status = ocfs2_global_release_dquot(dquot);
 541                         if (status < 0) {
 542                                 mlog_errno(status);
 543                                 goto out_commit;
 544                         }
 545                         /* Release local quota file entry */
 546                         status = ocfs2_journal_access_dq(handle,
 547                                         INODE_CACHE(lqinode),
 548                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 549                         if (status < 0) {
 550                                 mlog_errno(status);
 551                                 goto out_commit;
 552                         }
 553                         lock_buffer(qbh);
 554                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 555                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 556                         le32_add_cpu(&dchunk->dqc_free, 1);
 557                         unlock_buffer(qbh);
 558                         ocfs2_journal_dirty(handle, qbh);
 559 out_commit:
 560                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 561                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
 562 out_drop_lock:
 563                         ocfs2_unlock_global_qf(oinfo, 1);
 564 out_put_dquot:
 565                         dqput(dquot);
 566 out_put_bh:
 567                         brelse(qbh);
 568                         if (status < 0)
 569                                 break;
 570                 }
 571                 brelse(hbh);
 572                 list_del(&rchunk->rc_list);
 573                 kfree(rchunk->rc_bitmap);
 574                 kfree(rchunk);
 575                 if (status < 0)
 576                         break;
 577         }
 578         if (status < 0)
 579                 free_recovery_list(&(rec->r_list[type]));
 580         if (status)
 581                 mlog_errno(status);
 582         return status;
 583 }
 584
 585 /* Recover local quota files for given node different from us */
 586 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 587                                 struct ocfs2_quota_recovery *rec,
 588                                 int slot_num)
 589 {
 590         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 591                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 592         struct super_block *sb = osb->sb;
 593         struct ocfs2_local_disk_dqinfo *ldinfo;
 594         struct buffer_head *bh;
 595         handle_t *handle;
 596         int type;
 597         int status = 0;
 598         struct inode *lqinode;
 599         unsigned int flags;
 600
 601         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 602                "slot %u\n", osb->dev_str, slot_num);
 603
 604         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 605         for (type = 0; type < MAXQUOTAS; type++) {
 606                 if (list_empty(&(rec->r_list[type])))
 607                         continue;
 608                 trace_ocfs2_finish_quota_recovery(slot_num);
 609                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 610                 if (!lqinode) {
 611                         status = -ENOENT;
 612                         goto out;
 613                 }
 614                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 615                                                        OCFS2_META_LOCK_NOQUEUE);
 616                 /* Someone else is holding the lock? Then he must be
 617                  * doing the recovery. Just skip the file... */
 618                 if (status == -EAGAIN) {
 619                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 620                                "device (%s) for slot %d because quota file is "
 621                                "locked.\n", osb->dev_str, slot_num);
 622                         status = 0;
 623                         goto out_put;
 624                 } else if (status < 0) {
 625                         mlog_errno(status);
 626                         goto out_put;
 627                 }
 628                 /* Now read local header */
 629                 bh = NULL;
 630                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 631                 if (status) {
 632                         mlog_errno(status);
 633                         mlog(ML_ERROR, "failed to read quota file info header "
 634                                 "(slot=%d type=%d)\n", slot_num, type);
 635                         goto out_lock;
 636                 }
 637                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 638                                                         OCFS2_LOCAL_INFO_OFF);
 639                 /* Is recovery still needed? */
 640                 flags = le32_to_cpu(ldinfo->dqi_flags);
 641                 if (!(flags & OLQF_CLEAN))
 642                         status = ocfs2_recover_local_quota_file(lqinode,
 643                                                                 type,
 644                                                                 rec);
 645                 /* We don't want to mark file as clean when it is actually
 646                  * active */
 647                 if (slot_num == osb->slot_num)
 648                         goto out_bh;
 649                 /* Mark quota file as clean if we are recovering quota file of
 650                  * some other node. */
 651                 handle = ocfs2_start_trans(osb,
 652                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 653                 if (IS_ERR(handle)) {
 654                         status = PTR_ERR(handle);
 655                         mlog_errno(status);
 656                         goto out_bh;
 657                 }
 658                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 659                                                  bh,
 660                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 661                 if (status < 0) {
 662                         mlog_errno(status);
 663                         goto out_trans;
 664                 }
 665                 lock_buffer(bh);
 666                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 667                 unlock_buffer(bh);
 668                 ocfs2_journal_dirty(handle, bh);
 669 out_trans:
 670                 ocfs2_commit_trans(osb, handle);
 671 out_bh:
 672                 brelse(bh);
 673 out_lock:
 674                 ocfs2_inode_unlock(lqinode, 1);
 675 out_put:
 676                 iput(lqinode);
 677                 if (status < 0)
 678                         break;
 679         }
 680 out:
 681         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 682         kfree(rec);
 683         return status;
 684 }
 685
 686 /* Read information header from quota file */
 687 static int ocfs2_local_read_info(struct super_block *sb, int type)
 688 {
 689         struct ocfs2_local_disk_dqinfo *ldinfo;
 690         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 691         struct ocfs2_mem_dqinfo *oinfo;
 692         struct inode *lqinode = sb_dqopt(sb)->files[type];
 693         int status;
 694         struct buffer_head *bh = NULL;
 695         struct ocfs2_quota_recovery *rec;
 696         int locked = 0;
 697
 698         /* We don't need the lock and we have to acquire quota file locks
 699          * which will later depend on this lock */
 700         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 701         info->dqi_maxblimit = 0x7fffffffffffffffLL;
 702         info->dqi_maxilimit = 0x7fffffffffffffffLL;
 703         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 704         if (!oinfo) {
 705                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 706                                " info.");
 707                 goto out_err;
 708         }
 709         info->dqi_priv = oinfo;
 710         oinfo->dqi_type = type;
 711         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 712         oinfo->dqi_rec = NULL;
 713         oinfo->dqi_lqi_bh = NULL;
 714         oinfo->dqi_libh = NULL;
 715
 716         status = ocfs2_global_read_info(sb, type);
 717         if (status < 0)
 718                 goto out_err;
 719
 720         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 721         if (status < 0) {
 722                 mlog_errno(status);
 723                 goto out_err;
 724         }
 725         locked = 1;
 726
 727         /* Now read local header */
 728         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 729         if (status) {
 730                 mlog_errno(status);
 731                 mlog(ML_ERROR, "failed to read quota file info header "
 732                         "(type=%d)\n", type);
 733                 goto out_err;
 734         }
 735         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 736                                                 OCFS2_LOCAL_INFO_OFF);
 737         info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 738         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 739         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 740         oinfo->dqi_libh = bh;
 741
 742         /* We crashed when using local quota file? */
 743         if (!(info->dqi_flags & OLQF_CLEAN)) {
 744                 rec = OCFS2_SB(sb)->quota_rec;
 745                 if (!rec) {
 746                         rec = ocfs2_alloc_quota_recovery();
 747                         if (!rec) {
 748                                 status = -ENOMEM;
 749                                 mlog_errno(status);
 750                                 goto out_err;
 751                         }
 752                         OCFS2_SB(sb)->quota_rec = rec;
 753                 }
 754
 755                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 756                                                    &rec->r_list[type]);
 757                 if (status < 0) {
 758                         mlog_errno(status);
 759                         goto out_err;
 760                 }
 761         }
 762
 763         status = ocfs2_load_local_quota_bitmaps(lqinode,
 764                                                 ldinfo,
 765                                                 &oinfo->dqi_chunk);
 766         if (status < 0) {
 767                 mlog_errno(status);
 768                 goto out_err;
 769         }
 770
 771         /* Now mark quota file as used */
 772         info->dqi_flags &= ~OLQF_CLEAN;
 773         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 774         if (status < 0) {
 775                 mlog_errno(status);
 776                 goto out_err;
 777         }
 778
 779         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 780         return 0;
 781 out_err:
 782         if (oinfo) {
 783                 iput(oinfo->dqi_gqinode);
 784                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 785                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 786                 brelse(oinfo->dqi_lqi_bh);
 787                 if (locked)
 788                         ocfs2_inode_unlock(lqinode, 1);
 789                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 790                 kfree(oinfo);
 791         }
 792         brelse(bh);
 793         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 794         return -1;
 795 }
 796
 797 /* Write local info to quota file */
 798 static int ocfs2_local_write_info(struct super_block *sb, int type)
 799 {
 800         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 801         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 802                                                 ->dqi_libh;
 803         int status;
 804
 805         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 806                                  info);
 807         if (status < 0) {
 808                 mlog_errno(status);
 809                 return -1;
 810         }
 811
 812         return 0;
 813 }
 814
 815 /* Release info from memory */
 816 static int ocfs2_local_free_info(struct super_block *sb, int type)
 817 {
 818         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 819         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 820         struct ocfs2_quota_chunk *chunk;
 821         struct ocfs2_local_disk_chunk *dchunk;
 822         int mark_clean = 1, len;
 823         int status;
 824
 825         iput(oinfo->dqi_gqinode);
 826         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 827         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 828         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 829                 dchunk = (struct ocfs2_local_disk_chunk *)
 830                                         (chunk->qc_headerbh->b_data);
 831                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 832                         len = ol_chunk_entries(sb);
 833                 } else {
 834                         len = (oinfo->dqi_blocks -
 835                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 836                               * ol_quota_entries_per_block(sb);
 837                 }
 838                 /* Not all entries free? Bug! */
 839                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 840                         mlog(ML_ERROR, "releasing quota file with used "
 841                                         "entries (type=%d)\n", type);
 842                         mark_clean = 0;
 843                 }
 844         }
 845         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 846
 847         /* dqonoff_mutex protects us against racing with recovery thread... */
 848         if (oinfo->dqi_rec) {
 849                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 850                 mark_clean = 0;
 851         }
 852
 853         if (!mark_clean)
 854                 goto out;
 855
 856         /* Mark local file as clean */
 857         info->dqi_flags |= OLQF_CLEAN;
 858         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 859                                  oinfo->dqi_libh,
 860                                  olq_update_info,
 861                                  info);
 862         if (status < 0) {
 863                 mlog_errno(status);
 864                 goto out;
 865         }
 866
 867 out:
 868         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 869         brelse(oinfo->dqi_libh);
 870         brelse(oinfo->dqi_lqi_bh);
 871         kfree(oinfo);
 872         return 0;
 873 }
 874
 875 static void olq_set_dquot(struct buffer_head *bh, void *private)
 876 {
 877         struct ocfs2_dquot *od = private;
 878         struct ocfs2_local_disk_dqblk *dqblk;
 879         struct super_block *sb = od->dq_dquot.dq_sb;
 880
 881         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 882                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 883
 884         dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
 885         spin_lock(&dq_data_lock);
 886         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 887                                           od->dq_origspace);
 888         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 889                                           od->dq_originodes);
 890         spin_unlock(&dq_data_lock);
 891         trace_olq_set_dquot(
 892                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 893                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 894                 od->dq_dquot.dq_id);
 895 }
 896
 897 /* Write dquot to local quota file */
 898 int ocfs2_local_write_dquot(struct dquot *dquot)
 899 {
 900         struct super_block *sb = dquot->dq_sb;
 901         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 902         struct buffer_head *bh;
 903         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
 904         int status;
 905
 906         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 907                                              &bh);
 908         if (status) {
 909                 mlog_errno(status);
 910                 goto out;
 911         }
 912         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 913         if (status < 0) {
 914                 mlog_errno(status);
 915                 goto out;
 916         }
 917 out:
 918         brelse(bh);
 919         return status;
 920 }
 921
 922 /* Find free entry in local quota file */
 923 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 924                                                        int type,
 925                                                        int *offset)
 926 {
 927         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 928         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 929         struct ocfs2_quota_chunk *chunk;
 930         struct ocfs2_local_disk_chunk *dchunk;
 931         int found = 0, len;
 932
 933         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 934                 dchunk = (struct ocfs2_local_disk_chunk *)
 935                                                 chunk->qc_headerbh->b_data;
 936                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
 937                         found = 1;
 938                         break;
 939                 }
 940         }
 941         if (!found)
 942                 return NULL;
 943
 944         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 945                 len = ol_chunk_entries(sb);
 946         } else {
 947                 len = (oinfo->dqi_blocks -
 948                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 949                       * ol_quota_entries_per_block(sb);
 950         }
 951
 952         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 953         /* We failed? */
 954         if (found == len) {
 955                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 956                      " entries free (type=%d)\n", chunk->qc_num,
 957                      le32_to_cpu(dchunk->dqc_free), type);
 958                 return ERR_PTR(-EIO);
 959         }
 960         *offset = found;
 961         return chunk;
 962 }
 963
 964 /* Add new chunk to the local quota file */
 965 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 966                                                         struct super_block *sb,
 967                                                         int type,
 968                                                         int *offset)
 969 {
 970         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 971         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 972         struct inode *lqinode = sb_dqopt(sb)->files[type];
 973         struct ocfs2_quota_chunk *chunk = NULL;
 974         struct ocfs2_local_disk_chunk *dchunk;
 975         int status;
 976         handle_t *handle;
 977         struct buffer_head *bh = NULL, *dbh = NULL;
 978         u64 p_blkno;
 979
 980         /* We are protected by dqio_sem so no locking needed */
 981         status = ocfs2_extend_no_holes(lqinode, NULL,
 982                                        lqinode->i_size + 2 * sb->s_blocksize,
 983                                        lqinode->i_size);
 984         if (status < 0) {
 985                 mlog_errno(status);
 986                 goto out;
 987         }
 988         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 989                                           lqinode->i_size + 2 * sb->s_blocksize);
 990         if (status < 0) {
 991                 mlog_errno(status);
 992                 goto out;
 993         }
 994
 995         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 996         if (!chunk) {
 997                 status = -ENOMEM;
 998                 mlog_errno(status);
 999                 goto out;
1000         }
1001         /* Local quota info and two new blocks we initialize */
1002         handle = ocfs2_start_trans(OCFS2_SB(sb),
1003                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1004                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1005         if (IS_ERR(handle)) {
1006                 status = PTR_ERR(handle);
1007                 mlog_errno(status);
1008                 goto out;
1009         }
1010
1011         /* Initialize chunk header */
1012         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1013                                              &p_blkno, NULL, NULL);
1014         if (status < 0) {
1015                 mlog_errno(status);
1016                 goto out_trans;
1017         }
1018         bh = sb_getblk(sb, p_blkno);
1019         if (!bh) {
1020                 status = -ENOMEM;
1021                 mlog_errno(status);
1022                 goto out_trans;
1023         }
1024         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1025         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1026         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1027                                          OCFS2_JOURNAL_ACCESS_CREATE);
1028         if (status < 0) {
1029                 mlog_errno(status);
1030                 goto out_trans;
1031         }
1032         lock_buffer(bh);
1033         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1034         memset(dchunk->dqc_bitmap, 0,
1035                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1036                OCFS2_QBLK_RESERVED_SPACE);
1037         unlock_buffer(bh);
1038         ocfs2_journal_dirty(handle, bh);
1039
1040         /* Initialize new block with structures */
1041         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1042                                              &p_blkno, NULL, NULL);
1043         if (status < 0) {
1044                 mlog_errno(status);
1045                 goto out_trans;
1046         }
1047         dbh = sb_getblk(sb, p_blkno);
1048         if (!dbh) {
1049                 status = -ENOMEM;
1050                 mlog_errno(status);
1051                 goto out_trans;
1052         }
1053         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1054         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1055                                          OCFS2_JOURNAL_ACCESS_CREATE);
1056         if (status < 0) {
1057                 mlog_errno(status);
1058                 goto out_trans;
1059         }
1060         lock_buffer(dbh);
1061         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1062         unlock_buffer(dbh);
1063         ocfs2_journal_dirty(handle, dbh);
1064
1065         /* Update local quotafile info */
1066         oinfo->dqi_blocks += 2;
1067         oinfo->dqi_chunks++;
1068         status = ocfs2_local_write_info(sb, type);
1069         if (status < 0) {
1070                 mlog_errno(status);
1071                 goto out_trans;
1072         }
1073         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1074         if (status < 0) {
1075                 mlog_errno(status);
1076                 goto out;
1077         }
1078
1079         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1080         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1081                                    struct ocfs2_quota_chunk,
1082                                    qc_chunk)->qc_num + 1;
1083         chunk->qc_headerbh = bh;
1084         *offset = 0;
1085         return chunk;
1086 out_trans:
1087         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1088 out:
1089         brelse(bh);
1090         brelse(dbh);
1091         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1092         return ERR_PTR(status);
1093 }
1094
1095 /* Find free entry in local quota file */
1096 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1097                                                        struct super_block *sb,
1098                                                        int type,
1099                                                        int *offset)
1100 {
1101         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1102         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1103         struct ocfs2_quota_chunk *chunk;
1104         struct inode *lqinode = sb_dqopt(sb)->files[type];
1105         struct ocfs2_local_disk_chunk *dchunk;
1106         int epb = ol_quota_entries_per_block(sb);
1107         unsigned int chunk_blocks;
1108         struct buffer_head *bh;
1109         u64 p_blkno;
1110         int status;
1111         handle_t *handle;
1112
1113         if (list_empty(&oinfo->dqi_chunk))
1114                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1115         /* Is the last chunk full? */
1116         chunk = list_entry(oinfo->dqi_chunk.prev,
1117                         struct ocfs2_quota_chunk, qc_chunk);
1118         chunk_blocks = oinfo->dqi_blocks -
1119                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1120         if (ol_chunk_blocks(sb) == chunk_blocks)
1121                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1122
1123         /* We are protected by dqio_sem so no locking needed */
1124         status = ocfs2_extend_no_holes(lqinode, NULL,
1125                                        lqinode->i_size + sb->s_blocksize,
1126                                        lqinode->i_size);
1127         if (status < 0) {
1128                 mlog_errno(status);
1129                 goto out;
1130         }
1131         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132                                           lqinode->i_size + sb->s_blocksize);
1133         if (status < 0) {
1134                 mlog_errno(status);
1135                 goto out;
1136         }
1137
1138         /* Get buffer from the just added block */
1139         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1140                                              &p_blkno, NULL, NULL);
1141         if (status < 0) {
1142                 mlog_errno(status);
1143                 goto out;
1144         }
1145         bh = sb_getblk(sb, p_blkno);
1146         if (!bh) {
1147                 status = -ENOMEM;
1148                 mlog_errno(status);
1149                 goto out;
1150         }
1151         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1152
1153         /* Local quota info, chunk header and the new block we initialize */
1154         handle = ocfs2_start_trans(OCFS2_SB(sb),
1155                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1156                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1157         if (IS_ERR(handle)) {
1158                 status = PTR_ERR(handle);
1159                 mlog_errno(status);
1160                 goto out;
1161         }
1162         /* Zero created block */
1163         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1164                                  OCFS2_JOURNAL_ACCESS_CREATE);
1165         if (status < 0) {
1166                 mlog_errno(status);
1167                 goto out_trans;
1168         }
1169         lock_buffer(bh);
1170         memset(bh->b_data, 0, sb->s_blocksize);
1171         unlock_buffer(bh);
1172         ocfs2_journal_dirty(handle, bh);
1173
1174         /* Update chunk header */
1175         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1176                                          chunk->qc_headerbh,
1177                                  OCFS2_JOURNAL_ACCESS_WRITE);
1178         if (status < 0) {
1179                 mlog_errno(status);
1180                 goto out_trans;
1181         }
1182
1183         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1184         lock_buffer(chunk->qc_headerbh);
1185         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1186         unlock_buffer(chunk->qc_headerbh);
1187         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1188
1189         /* Update file header */
1190         oinfo->dqi_blocks++;
1191         status = ocfs2_local_write_info(sb, type);
1192         if (status < 0) {
1193                 mlog_errno(status);
1194                 goto out_trans;
1195         }
1196
1197         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1198         if (status < 0) {
1199                 mlog_errno(status);
1200                 goto out;
1201         }
1202         *offset = chunk_blocks * epb;
1203         return chunk;
1204 out_trans:
1205         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1206 out:
1207         return ERR_PTR(status);
1208 }
1209
1210 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1211 {
1212         int *offset = private;
1213         struct ocfs2_local_disk_chunk *dchunk;
1214
1215         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1216         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1217         le32_add_cpu(&dchunk->dqc_free, -1);
1218 }
1219
1220 /* Create dquot in the local file for given id */
1221 int ocfs2_create_local_dquot(struct dquot *dquot)
1222 {
1223         struct super_block *sb = dquot->dq_sb;
1224         int type = dquot->dq_type;
1225         struct inode *lqinode = sb_dqopt(sb)->files[type];
1226         struct ocfs2_quota_chunk *chunk;
1227         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1228         int offset;
1229         int status;
1230         u64 pcount;
1231
1232         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1233         chunk = ocfs2_find_free_entry(sb, type, &offset);
1234         if (!chunk) {
1235                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1236                 if (IS_ERR(chunk)) {
1237                         status = PTR_ERR(chunk);
1238                         goto out;
1239                 }
1240         } else if (IS_ERR(chunk)) {
1241                 status = PTR_ERR(chunk);
1242                 goto out;
1243         }
1244         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1245         od->dq_chunk = chunk;
1246         status = ocfs2_extent_map_get_blocks(lqinode,
1247                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1248                                      &od->dq_local_phys_blk,
1249                                      &pcount,
1250                                      NULL);
1251
1252         /* Initialize dquot structure on disk */
1253         status = ocfs2_local_write_dquot(dquot);
1254         if (status < 0) {
1255                 mlog_errno(status);
1256                 goto out;
1257         }
1258
1259         /* Mark structure as allocated */
1260         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1261                                  &offset);
1262         if (status < 0) {
1263                 mlog_errno(status);
1264                 goto out;
1265         }
1266 out:
1267         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1268         return status;
1269 }
1270
1271 /*
1272  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1273  * already started a transaction and written all changes to global quota file
1274  */
1275 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1276 {
1277         int status;
1278         int type = dquot->dq_type;
1279         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1280         struct super_block *sb = dquot->dq_sb;
1281         struct ocfs2_local_disk_chunk *dchunk;
1282         int offset;
1283
1284         status = ocfs2_journal_access_dq(handle,
1285                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1286                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1287         if (status < 0) {
1288                 mlog_errno(status);
1289                 goto out;
1290         }
1291         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1292                                              od->dq_local_off);
1293         dchunk = (struct ocfs2_local_disk_chunk *)
1294                         (od->dq_chunk->qc_headerbh->b_data);
1295         /* Mark structure as freed */
1296         lock_buffer(od->dq_chunk->qc_headerbh);
1297         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1298         le32_add_cpu(&dchunk->dqc_free, 1);
1299         unlock_buffer(od->dq_chunk->qc_headerbh);
1300         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1301
1302 out:
1303         /* Clear the read bit so that next time someone uses this
1304          * dquot he reads fresh info from disk and allocates local
1305          * dquot structure */
1306         clear_bit(DQ_READ_B, &dquot->dq_flags);
1307         return status;
1308 }
1309
1310 static const struct quota_format_ops ocfs2_format_ops = {
1311         .check_quota_file       = ocfs2_local_check_quota_file,
1312         .read_file_info         = ocfs2_local_read_info,
1313         .write_file_info        = ocfs2_global_write_info,
1314         .free_file_info         = ocfs2_local_free_info,
1315 };
1316
1317 struct quota_format_type ocfs2_quota_format = {
1318         .qf_fmt_id = QFMT_OCFS2,
1319         .qf_ops = &ocfs2_format_ops,
1320         .qf_owner = THIS_MODULE
1321 };