fs/ocfs2/quota_local.c

   1 /*
   2  *  Implementation of operations over local quota file
   3  */
   4
   5 #include <linux/fs.h>
   6 #include <linux/slab.h>
   7 #include <linux/quota.h>
   8 #include <linux/quotaops.h>
   9 #include <linux/module.h>
  10
  11 #include <cluster/masklog.h>
  12
  13 #include "ocfs2_fs.h"
  14 #include "ocfs2.h"
  15 #include "inode.h"
  16 #include "alloc.h"
  17 #include "file.h"
  18 #include "buffer_head_io.h"
  19 #include "journal.h"
  20 #include "sysfile.h"
  21 #include "dlmglue.h"
  22 #include "quota.h"
  23 #include "uptodate.h"
  24 #include "super.h"
  25 #include "ocfs2_trace.h"
  26
  27 /* Number of local quota structures per block */
  28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
  29 {
  30         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
  31                 sizeof(struct ocfs2_local_disk_dqblk));
  32 }
  33
  34 /* Number of blocks with entries in one chunk */
  35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
  36 {
  37         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
  38                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
  39                ol_quota_entries_per_block(sb);
  40 }
  41
  42 /* Number of entries in a chunk bitmap */
  43 static unsigned int ol_chunk_entries(struct super_block *sb)
  44 {
  45         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
  46 }
  47
  48 /* Offset of the chunk in quota file */
  49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
  50 {
  51         /* 1 block for local quota file info, 1 block per chunk for chunk info */
  52         return 1 + (ol_chunk_blocks(sb) + 1) * c;
  53 }
  54
  55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
  56 {
  57         int epb = ol_quota_entries_per_block(sb);
  58
  59         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
  60 }
  61
  62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
  63 {
  64         int epb = ol_quota_entries_per_block(sb);
  65
  66         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
  67 }
  68
  69 /* Offset of the dquot structure in the quota file */
  70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
  71 {
  72         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
  73                ol_dqblk_block_off(sb, c, off);
  74 }
  75
  76 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
  77 {
  78         return off & ((1 << sb->s_blocksize_bits) - 1);
  79 }
  80
  81 /* Compute offset in the chunk of a structure with the given offset */
  82 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
  83 {
  84         int epb = ol_quota_entries_per_block(sb);
  85
  86         return ((off >> sb->s_blocksize_bits) -
  87                         ol_quota_chunk_block(sb, c) - 1) * epb
  88                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
  89                  sizeof(struct ocfs2_local_disk_dqblk);
  90 }
  91
  92 /* Write bufferhead into the fs */
  93 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
  94                 void (*modify)(struct buffer_head *, void *), void *private)
  95 {
  96         struct super_block *sb = inode->i_sb;
  97         handle_t *handle;
  98         int status;
  99
 100         handle = ocfs2_start_trans(OCFS2_SB(sb),
 101                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 102         if (IS_ERR(handle)) {
 103                 status = PTR_ERR(handle);
 104                 mlog_errno(status);
 105                 return status;
 106         }
 107         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
 108                                          OCFS2_JOURNAL_ACCESS_WRITE);
 109         if (status < 0) {
 110                 mlog_errno(status);
 111                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
 112                 return status;
 113         }
 114         lock_buffer(bh);
 115         modify(bh, private);
 116         unlock_buffer(bh);
 117         ocfs2_journal_dirty(handle, bh);
 118
 119         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
 120         if (status < 0) {
 121                 mlog_errno(status);
 122                 return status;
 123         }
 124         return 0;
 125 }
 126
 127 /*
 128  * Read quota block from a given logical offset.
 129  *
 130  * This function acquires ip_alloc_sem and thus it must not be called with a
 131  * transaction started.
 132  */
 133 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
 134                                   struct buffer_head **bh)
 135 {
 136         int rc = 0;
 137         struct buffer_head *tmp = *bh;
 138
 139         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
 140                 ocfs2_error(inode->i_sb,
 141                             "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
 142                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
 143                             (unsigned long long)v_block,
 144                             (unsigned long long)i_size_read(inode));
 145                 return -EIO;
 146         }
 147         rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
 148                                     ocfs2_validate_quota_block);
 149         if (rc)
 150                 mlog_errno(rc);
 151
 152         /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
 153         if (!rc && !*bh)
 154                 *bh = tmp;
 155
 156         return rc;
 157 }
 158
 159 /* Check whether we understand format of quota files */
 160 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
 161 {
 162         unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 163         unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 164         unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 165         unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 166         unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
 167                                               GROUP_QUOTA_SYSTEM_INODE };
 168         struct buffer_head *bh = NULL;
 169         struct inode *linode = sb_dqopt(sb)->files[type];
 170         struct inode *ginode = NULL;
 171         struct ocfs2_disk_dqheader *dqhead;
 172         int status, ret = 0;
 173
 174         /* First check whether we understand local quota file */
 175         status = ocfs2_read_quota_block(linode, 0, &bh);
 176         if (status) {
 177                 mlog_errno(status);
 178                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
 179                         type);
 180                 goto out_err;
 181         }
 182         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 183         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
 184                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
 185                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
 186                         lmagics[type], type);
 187                 goto out_err;
 188         }
 189         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
 190                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
 191                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
 192                         lversions[type], type);
 193                 goto out_err;
 194         }
 195         brelse(bh);
 196         bh = NULL;
 197
 198         /* Next check whether we understand global quota file */
 199         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
 200                                                 OCFS2_INVALID_SLOT);
 201         if (!ginode) {
 202                 mlog(ML_ERROR, "cannot get global quota file inode "
 203                                 "(type=%d)\n", type);
 204                 goto out_err;
 205         }
 206         /* Since the header is read only, we don't care about locking */
 207         status = ocfs2_read_quota_block(ginode, 0, &bh);
 208         if (status) {
 209                 mlog_errno(status);
 210                 mlog(ML_ERROR, "failed to read global quota file header "
 211                                 "(type=%d)\n", type);
 212                 goto out_err;
 213         }
 214         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 215         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
 216                 mlog(ML_ERROR, "global quota file magic does not match "
 217                         "(%u != %u), type=%d\n",
 218                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
 219                 goto out_err;
 220         }
 221         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
 222                 mlog(ML_ERROR, "global quota file version does not match "
 223                         "(%u != %u), type=%d\n",
 224                         le32_to_cpu(dqhead->dqh_version), gversions[type],
 225                         type);
 226                 goto out_err;
 227         }
 228
 229         ret = 1;
 230 out_err:
 231         brelse(bh);
 232         iput(ginode);
 233         return ret;
 234 }
 235
 236 /* Release given list of quota file chunks */
 237 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
 238 {
 239         struct ocfs2_quota_chunk *pos, *next;
 240
 241         list_for_each_entry_safe(pos, next, head, qc_chunk) {
 242                 list_del(&pos->qc_chunk);
 243                 brelse(pos->qc_headerbh);
 244                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
 245         }
 246 }
 247
 248 /* Load quota bitmaps into memory */
 249 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
 250                         struct ocfs2_local_disk_dqinfo *ldinfo,
 251                         struct list_head *head)
 252 {
 253         struct ocfs2_quota_chunk *newchunk;
 254         int i, status;
 255
 256         INIT_LIST_HEAD(head);
 257         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
 258                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 259                 if (!newchunk) {
 260                         ocfs2_release_local_quota_bitmaps(head);
 261                         return -ENOMEM;
 262                 }
 263                 newchunk->qc_num = i;
 264                 newchunk->qc_headerbh = NULL;
 265                 status = ocfs2_read_quota_block(inode,
 266                                 ol_quota_chunk_block(inode->i_sb, i),
 267                                 &newchunk->qc_headerbh);
 268                 if (status) {
 269                         mlog_errno(status);
 270                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
 271                         ocfs2_release_local_quota_bitmaps(head);
 272                         return status;
 273                 }
 274                 list_add_tail(&newchunk->qc_chunk, head);
 275         }
 276         return 0;
 277 }
 278
 279 static void olq_update_info(struct buffer_head *bh, void *private)
 280 {
 281         struct mem_dqinfo *info = private;
 282         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 283         struct ocfs2_local_disk_dqinfo *ldinfo;
 284
 285         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 286                                                 OCFS2_LOCAL_INFO_OFF);
 287         spin_lock(&dq_data_lock);
 288         ldinfo->dqi_flags = cpu_to_le32(oinfo->dqi_flags);
 289         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
 290         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
 291         spin_unlock(&dq_data_lock);
 292 }
 293
 294 static int ocfs2_add_recovery_chunk(struct super_block *sb,
 295                                     struct ocfs2_local_disk_chunk *dchunk,
 296                                     int chunk,
 297                                     struct list_head *head)
 298 {
 299         struct ocfs2_recovery_chunk *rc;
 300
 301         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
 302         if (!rc)
 303                 return -ENOMEM;
 304         rc->rc_chunk = chunk;
 305         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
 306         if (!rc->rc_bitmap) {
 307                 kfree(rc);
 308                 return -ENOMEM;
 309         }
 310         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
 311                (ol_chunk_entries(sb) + 7) >> 3);
 312         list_add_tail(&rc->rc_list, head);
 313         return 0;
 314 }
 315
 316 static void free_recovery_list(struct list_head *head)
 317 {
 318         struct ocfs2_recovery_chunk *next;
 319         struct ocfs2_recovery_chunk *rchunk;
 320
 321         list_for_each_entry_safe(rchunk, next, head, rc_list) {
 322                 list_del(&rchunk->rc_list);
 323                 kfree(rchunk->rc_bitmap);
 324                 kfree(rchunk);
 325         }
 326 }
 327
 328 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
 329 {
 330         int type;
 331
 332         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 333                 free_recovery_list(&(rec->r_list[type]));
 334         kfree(rec);
 335 }
 336
 337 /* Load entries in our quota file we have to recover*/
 338 static int ocfs2_recovery_load_quota(struct inode *lqinode,
 339                                      struct ocfs2_local_disk_dqinfo *ldinfo,
 340                                      int type,
 341                                      struct list_head *head)
 342 {
 343         struct super_block *sb = lqinode->i_sb;
 344         struct buffer_head *hbh;
 345         struct ocfs2_local_disk_chunk *dchunk;
 346         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
 347         int status = 0;
 348
 349         for (i = 0; i < chunks; i++) {
 350                 hbh = NULL;
 351                 status = ocfs2_read_quota_block(lqinode,
 352                                                 ol_quota_chunk_block(sb, i),
 353                                                 &hbh);
 354                 if (status) {
 355                         mlog_errno(status);
 356                         break;
 357                 }
 358                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 359                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
 360                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
 361                 brelse(hbh);
 362                 if (status < 0)
 363                         break;
 364         }
 365         if (status < 0)
 366                 free_recovery_list(head);
 367         return status;
 368 }
 369
 370 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
 371 {
 372         int type;
 373         struct ocfs2_quota_recovery *rec;
 374
 375         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
 376         if (!rec)
 377                 return NULL;
 378         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 379                 INIT_LIST_HEAD(&(rec->r_list[type]));
 380         return rec;
 381 }
 382
 383 /* Load information we need for quota recovery into memory */
 384 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
 385                                                 struct ocfs2_super *osb,
 386                                                 int slot_num)
 387 {
 388         unsigned int feature[OCFS2_MAXQUOTAS] = {
 389                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 390                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 391         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 392                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 393         struct super_block *sb = osb->sb;
 394         struct ocfs2_local_disk_dqinfo *ldinfo;
 395         struct inode *lqinode;
 396         struct buffer_head *bh;
 397         int type;
 398         int status = 0;
 399         struct ocfs2_quota_recovery *rec;
 400
 401         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 402                "slot %u\n", osb->dev_str, slot_num);
 403
 404         rec = ocfs2_alloc_quota_recovery();
 405         if (!rec)
 406                 return ERR_PTR(-ENOMEM);
 407         /* First init... */
 408
 409         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 410                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 411                         continue;
 412                 /* At this point, journal of the slot is already replayed so
 413                  * we can trust metadata and data of the quota file */
 414                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 415                 if (!lqinode) {
 416                         status = -ENOENT;
 417                         goto out;
 418                 }
 419                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 420                                                OCFS2_META_LOCK_RECOVERY);
 421                 if (status < 0) {
 422                         mlog_errno(status);
 423                         goto out_put;
 424                 }
 425                 /* Now read local header */
 426                 bh = NULL;
 427                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 428                 if (status) {
 429                         mlog_errno(status);
 430                         mlog(ML_ERROR, "failed to read quota file info header "
 431                                 "(slot=%d type=%d)\n", slot_num, type);
 432                         goto out_lock;
 433                 }
 434                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 435                                                         OCFS2_LOCAL_INFO_OFF);
 436                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 437                                                    &rec->r_list[type]);
 438                 brelse(bh);
 439 out_lock:
 440                 ocfs2_inode_unlock(lqinode, 1);
 441 out_put:
 442                 iput(lqinode);
 443                 if (status < 0)
 444                         break;
 445         }
 446 out:
 447         if (status < 0) {
 448                 ocfs2_free_quota_recovery(rec);
 449                 rec = ERR_PTR(status);
 450         }
 451         return rec;
 452 }
 453
 454 /* Sync changes in local quota file into global quota file and
 455  * reinitialize local quota file.
 456  * The function expects local quota file to be already locked and
 457  * s_umount locked in shared mode. */
 458 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 459                                           int type,
 460                                           struct ocfs2_quota_recovery *rec)
 461 {
 462         struct super_block *sb = lqinode->i_sb;
 463         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 464         struct ocfs2_local_disk_chunk *dchunk;
 465         struct ocfs2_local_disk_dqblk *dqblk;
 466         struct dquot *dquot;
 467         handle_t *handle;
 468         struct buffer_head *hbh = NULL, *qbh = NULL;
 469         int status = 0;
 470         int bit, chunk;
 471         struct ocfs2_recovery_chunk *rchunk, *next;
 472         qsize_t spacechange, inodechange;
 473
 474         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 475
 476         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 477                 chunk = rchunk->rc_chunk;
 478                 hbh = NULL;
 479                 status = ocfs2_read_quota_block(lqinode,
 480                                                 ol_quota_chunk_block(sb, chunk),
 481                                                 &hbh);
 482                 if (status) {
 483                         mlog_errno(status);
 484                         break;
 485                 }
 486                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 487                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 488                         qbh = NULL;
 489                         status = ocfs2_read_quota_block(lqinode,
 490                                                 ol_dqblk_block(sb, chunk, bit),
 491                                                 &qbh);
 492                         if (status) {
 493                                 mlog_errno(status);
 494                                 break;
 495                         }
 496                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 497                                 ol_dqblk_block_off(sb, chunk, bit));
 498                         dquot = dqget(sb,
 499                                       make_kqid(&init_user_ns, type,
 500                                                 le64_to_cpu(dqblk->dqb_id)));
 501                         if (IS_ERR(dquot)) {
 502                                 status = PTR_ERR(dquot);
 503                                 mlog(ML_ERROR, "Failed to get quota structure "
 504                                      "for id %u, type %d. Cannot finish quota "
 505                                      "file recovery.\n",
 506                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
 507                                      type);
 508                                 goto out_put_bh;
 509                         }
 510                         status = ocfs2_lock_global_qf(oinfo, 1);
 511                         if (status < 0) {
 512                                 mlog_errno(status);
 513                                 goto out_put_dquot;
 514                         }
 515
 516                         handle = ocfs2_start_trans(OCFS2_SB(sb),
 517                                                    OCFS2_QSYNC_CREDITS);
 518                         if (IS_ERR(handle)) {
 519                                 status = PTR_ERR(handle);
 520                                 mlog_errno(status);
 521                                 goto out_drop_lock;
 522                         }
 523                         down_write(&sb_dqopt(sb)->dqio_sem);
 524                         spin_lock(&dq_data_lock);
 525                         /* Add usage from quota entry into quota changes
 526                          * of our node. Auxiliary variables are important
 527                          * due to signedness */
 528                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 529                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 530                         dquot->dq_dqb.dqb_curspace += spacechange;
 531                         dquot->dq_dqb.dqb_curinodes += inodechange;
 532                         spin_unlock(&dq_data_lock);
 533                         /* We want to drop reference held by the crashed
 534                          * node. Since we have our own reference we know
 535                          * global structure actually won't be freed. */
 536                         status = ocfs2_global_release_dquot(dquot);
 537                         if (status < 0) {
 538                                 mlog_errno(status);
 539                                 goto out_commit;
 540                         }
 541                         /* Release local quota file entry */
 542                         status = ocfs2_journal_access_dq(handle,
 543                                         INODE_CACHE(lqinode),
 544                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 545                         if (status < 0) {
 546                                 mlog_errno(status);
 547                                 goto out_commit;
 548                         }
 549                         lock_buffer(qbh);
 550                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 551                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 552                         le32_add_cpu(&dchunk->dqc_free, 1);
 553                         unlock_buffer(qbh);
 554                         ocfs2_journal_dirty(handle, qbh);
 555 out_commit:
 556                         up_write(&sb_dqopt(sb)->dqio_sem);
 557                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
 558 out_drop_lock:
 559                         ocfs2_unlock_global_qf(oinfo, 1);
 560 out_put_dquot:
 561                         dqput(dquot);
 562 out_put_bh:
 563                         brelse(qbh);
 564                         if (status < 0)
 565                                 break;
 566                 }
 567                 brelse(hbh);
 568                 list_del(&rchunk->rc_list);
 569                 kfree(rchunk->rc_bitmap);
 570                 kfree(rchunk);
 571                 if (status < 0)
 572                         break;
 573         }
 574         if (status < 0)
 575                 free_recovery_list(&(rec->r_list[type]));
 576         if (status)
 577                 mlog_errno(status);
 578         return status;
 579 }
 580
 581 /* Recover local quota files for given node different from us */
 582 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 583                                 struct ocfs2_quota_recovery *rec,
 584                                 int slot_num)
 585 {
 586         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 587                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 588         struct super_block *sb = osb->sb;
 589         struct ocfs2_local_disk_dqinfo *ldinfo;
 590         struct buffer_head *bh;
 591         handle_t *handle;
 592         int type;
 593         int status = 0;
 594         struct inode *lqinode;
 595         unsigned int flags;
 596
 597         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 598                "slot %u\n", osb->dev_str, slot_num);
 599
 600         down_read(&sb->s_umount);
 601         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 602                 if (list_empty(&(rec->r_list[type])))
 603                         continue;
 604                 trace_ocfs2_finish_quota_recovery(slot_num);
 605                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 606                 if (!lqinode) {
 607                         status = -ENOENT;
 608                         goto out;
 609                 }
 610                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 611                                                        OCFS2_META_LOCK_NOQUEUE);
 612                 /* Someone else is holding the lock? Then he must be
 613                  * doing the recovery. Just skip the file... */
 614                 if (status == -EAGAIN) {
 615                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 616                                "device (%s) for slot %d because quota file is "
 617                                "locked.\n", osb->dev_str, slot_num);
 618                         status = 0;
 619                         goto out_put;
 620                 } else if (status < 0) {
 621                         mlog_errno(status);
 622                         goto out_put;
 623                 }
 624                 /* Now read local header */
 625                 bh = NULL;
 626                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 627                 if (status) {
 628                         mlog_errno(status);
 629                         mlog(ML_ERROR, "failed to read quota file info header "
 630                                 "(slot=%d type=%d)\n", slot_num, type);
 631                         goto out_lock;
 632                 }
 633                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 634                                                         OCFS2_LOCAL_INFO_OFF);
 635                 /* Is recovery still needed? */
 636                 flags = le32_to_cpu(ldinfo->dqi_flags);
 637                 if (!(flags & OLQF_CLEAN))
 638                         status = ocfs2_recover_local_quota_file(lqinode,
 639                                                                 type,
 640                                                                 rec);
 641                 /* We don't want to mark file as clean when it is actually
 642                  * active */
 643                 if (slot_num == osb->slot_num)
 644                         goto out_bh;
 645                 /* Mark quota file as clean if we are recovering quota file of
 646                  * some other node. */
 647                 handle = ocfs2_start_trans(osb,
 648                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 649                 if (IS_ERR(handle)) {
 650                         status = PTR_ERR(handle);
 651                         mlog_errno(status);
 652                         goto out_bh;
 653                 }
 654                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 655                                                  bh,
 656                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 657                 if (status < 0) {
 658                         mlog_errno(status);
 659                         goto out_trans;
 660                 }
 661                 lock_buffer(bh);
 662                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 663                 unlock_buffer(bh);
 664                 ocfs2_journal_dirty(handle, bh);
 665 out_trans:
 666                 ocfs2_commit_trans(osb, handle);
 667 out_bh:
 668                 brelse(bh);
 669 out_lock:
 670                 ocfs2_inode_unlock(lqinode, 1);
 671 out_put:
 672                 iput(lqinode);
 673                 if (status < 0)
 674                         break;
 675         }
 676 out:
 677         up_read(&sb->s_umount);
 678         kfree(rec);
 679         return status;
 680 }
 681
 682 /* Read information header from quota file */
 683 static int ocfs2_local_read_info(struct super_block *sb, int type)
 684 {
 685         struct ocfs2_local_disk_dqinfo *ldinfo;
 686         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 687         struct ocfs2_mem_dqinfo *oinfo;
 688         struct inode *lqinode = sb_dqopt(sb)->files[type];
 689         int status;
 690         struct buffer_head *bh = NULL;
 691         struct ocfs2_quota_recovery *rec;
 692         int locked = 0;
 693
 694         /* We don't need the lock and we have to acquire quota file locks
 695          * which will later depend on this lock */
 696         up_write(&sb_dqopt(sb)->dqio_sem);
 697         info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
 698         info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
 699         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 700         if (!oinfo) {
 701                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 702                                " info.");
 703                 goto out_err;
 704         }
 705         info->dqi_priv = oinfo;
 706         oinfo->dqi_type = type;
 707         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 708         oinfo->dqi_rec = NULL;
 709         oinfo->dqi_lqi_bh = NULL;
 710         oinfo->dqi_libh = NULL;
 711
 712         status = ocfs2_global_read_info(sb, type);
 713         if (status < 0)
 714                 goto out_err;
 715
 716         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 717         if (status < 0) {
 718                 mlog_errno(status);
 719                 goto out_err;
 720         }
 721         locked = 1;
 722
 723         /* Now read local header */
 724         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 725         if (status) {
 726                 mlog_errno(status);
 727                 mlog(ML_ERROR, "failed to read quota file info header "
 728                         "(type=%d)\n", type);
 729                 goto out_err;
 730         }
 731         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 732                                                 OCFS2_LOCAL_INFO_OFF);
 733         oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 734         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 735         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 736         oinfo->dqi_libh = bh;
 737
 738         /* We crashed when using local quota file? */
 739         if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
 740                 rec = OCFS2_SB(sb)->quota_rec;
 741                 if (!rec) {
 742                         rec = ocfs2_alloc_quota_recovery();
 743                         if (!rec) {
 744                                 status = -ENOMEM;
 745                                 mlog_errno(status);
 746                                 goto out_err;
 747                         }
 748                         OCFS2_SB(sb)->quota_rec = rec;
 749                 }
 750
 751                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 752                                                    &rec->r_list[type]);
 753                 if (status < 0) {
 754                         mlog_errno(status);
 755                         goto out_err;
 756                 }
 757         }
 758
 759         status = ocfs2_load_local_quota_bitmaps(lqinode,
 760                                                 ldinfo,
 761                                                 &oinfo->dqi_chunk);
 762         if (status < 0) {
 763                 mlog_errno(status);
 764                 goto out_err;
 765         }
 766
 767         /* Now mark quota file as used */
 768         oinfo->dqi_flags &= ~OLQF_CLEAN;
 769         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 770         if (status < 0) {
 771                 mlog_errno(status);
 772                 goto out_err;
 773         }
 774
 775         down_write(&sb_dqopt(sb)->dqio_sem);
 776         return 0;
 777 out_err:
 778         if (oinfo) {
 779                 iput(oinfo->dqi_gqinode);
 780                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 781                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 782                 brelse(oinfo->dqi_lqi_bh);
 783                 if (locked)
 784                         ocfs2_inode_unlock(lqinode, 1);
 785                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 786                 kfree(oinfo);
 787         }
 788         brelse(bh);
 789         down_write(&sb_dqopt(sb)->dqio_sem);
 790         return -1;
 791 }
 792
 793 /* Write local info to quota file */
 794 static int ocfs2_local_write_info(struct super_block *sb, int type)
 795 {
 796         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 797         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 798                                                 ->dqi_libh;
 799         int status;
 800
 801         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 802                                  info);
 803         if (status < 0) {
 804                 mlog_errno(status);
 805                 return -1;
 806         }
 807
 808         return 0;
 809 }
 810
 811 /* Release info from memory */
 812 static int ocfs2_local_free_info(struct super_block *sb, int type)
 813 {
 814         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 815         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 816         struct ocfs2_quota_chunk *chunk;
 817         struct ocfs2_local_disk_chunk *dchunk;
 818         int mark_clean = 1, len;
 819         int status;
 820
 821         iput(oinfo->dqi_gqinode);
 822         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 823         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 824         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 825                 dchunk = (struct ocfs2_local_disk_chunk *)
 826                                         (chunk->qc_headerbh->b_data);
 827                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 828                         len = ol_chunk_entries(sb);
 829                 } else {
 830                         len = (oinfo->dqi_blocks -
 831                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 832                               * ol_quota_entries_per_block(sb);
 833                 }
 834                 /* Not all entries free? Bug! */
 835                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 836                         mlog(ML_ERROR, "releasing quota file with used "
 837                                         "entries (type=%d)\n", type);
 838                         mark_clean = 0;
 839                 }
 840         }
 841         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 842
 843         /*
 844          * s_umount held in exclusive mode protects us against racing with
 845          * recovery thread...
 846          */
 847         if (oinfo->dqi_rec) {
 848                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 849                 mark_clean = 0;
 850         }
 851
 852         if (!mark_clean)
 853                 goto out;
 854
 855         /* Mark local file as clean */
 856         oinfo->dqi_flags |= OLQF_CLEAN;
 857         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 858                                  oinfo->dqi_libh,
 859                                  olq_update_info,
 860                                  info);
 861         if (status < 0) {
 862                 mlog_errno(status);
 863                 goto out;
 864         }
 865
 866 out:
 867         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 868         brelse(oinfo->dqi_libh);
 869         brelse(oinfo->dqi_lqi_bh);
 870         kfree(oinfo);
 871         return 0;
 872 }
 873
 874 static void olq_set_dquot(struct buffer_head *bh, void *private)
 875 {
 876         struct ocfs2_dquot *od = private;
 877         struct ocfs2_local_disk_dqblk *dqblk;
 878         struct super_block *sb = od->dq_dquot.dq_sb;
 879
 880         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 881                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 882
 883         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
 884                                               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                 from_kqid(&init_user_ns, 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_id.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                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
 983                                        i_size_read(lqinode));
 984         if (status < 0) {
 985                 mlog_errno(status);
 986                 goto out;
 987         }
 988         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 989                                           i_size_read(lqinode) + 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                                        i_size_read(lqinode) + sb->s_blocksize,
1126                                        i_size_read(lqinode));
1127         if (status < 0) {
1128                 mlog_errno(status);
1129                 goto out;
1130         }
1131         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132                                           i_size_read(lqinode) + 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_id.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_id.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         return status;
1304 }
1305
1306 static const struct quota_format_ops ocfs2_format_ops = {
1307         .check_quota_file       = ocfs2_local_check_quota_file,
1308         .read_file_info         = ocfs2_local_read_info,
1309         .write_file_info        = ocfs2_global_write_info,
1310         .free_file_info         = ocfs2_local_free_info,
1311 };
1312
1313 struct quota_format_type ocfs2_quota_format = {
1314         .qf_fmt_id = QFMT_OCFS2,
1315         .qf_ops = &ocfs2_format_ops,
1316         .qf_owner = THIS_MODULE
1317 };