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[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 170         unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 171         unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 172         unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 173         unsigned int ino[OCFS2_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 < OCFS2_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 < OCFS2_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[OCFS2_MAXQUOTAS] = {
 396                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 397                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 398         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 399                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 400         struct super_block *sb = osb->sb;
 401         struct ocfs2_local_disk_dqinfo *ldinfo;
 402         struct inode *lqinode;
 403         struct buffer_head *bh;
 404         int type;
 405         int status = 0;
 406         struct ocfs2_quota_recovery *rec;
 407
 408         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 409                "slot %u\n", osb->dev_str, slot_num);
 410
 411         rec = ocfs2_alloc_quota_recovery();
 412         if (!rec)
 413                 return ERR_PTR(-ENOMEM);
 414         /* First init... */
 415
 416         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 417                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 418                         continue;
 419                 /* At this point, journal of the slot is already replayed so
 420                  * we can trust metadata and data of the quota file */
 421                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 422                 if (!lqinode) {
 423                         status = -ENOENT;
 424                         goto out;
 425                 }
 426                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 427                                                OCFS2_META_LOCK_RECOVERY);
 428                 if (status < 0) {
 429                         mlog_errno(status);
 430                         goto out_put;
 431                 }
 432                 /* Now read local header */
 433                 bh = NULL;
 434                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 435                 if (status) {
 436                         mlog_errno(status);
 437                         mlog(ML_ERROR, "failed to read quota file info header "
 438                                 "(slot=%d type=%d)\n", slot_num, type);
 439                         goto out_lock;
 440                 }
 441                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 442                                                         OCFS2_LOCAL_INFO_OFF);
 443                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 444                                                    &rec->r_list[type]);
 445                 brelse(bh);
 446 out_lock:
 447                 ocfs2_inode_unlock(lqinode, 1);
 448 out_put:
 449                 iput(lqinode);
 450                 if (status < 0)
 451                         break;
 452         }
 453 out:
 454         if (status < 0) {
 455                 ocfs2_free_quota_recovery(rec);
 456                 rec = ERR_PTR(status);
 457         }
 458         return rec;
 459 }
 460
 461 /* Sync changes in local quota file into global quota file and
 462  * reinitialize local quota file.
 463  * The function expects local quota file to be already locked and
 464  * dqonoff_mutex locked. */
 465 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 466                                           int type,
 467                                           struct ocfs2_quota_recovery *rec)
 468 {
 469         struct super_block *sb = lqinode->i_sb;
 470         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 471         struct ocfs2_local_disk_chunk *dchunk;
 472         struct ocfs2_local_disk_dqblk *dqblk;
 473         struct dquot *dquot;
 474         handle_t *handle;
 475         struct buffer_head *hbh = NULL, *qbh = NULL;
 476         int status = 0;
 477         int bit, chunk;
 478         struct ocfs2_recovery_chunk *rchunk, *next;
 479         qsize_t spacechange, inodechange;
 480
 481         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 482
 483         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 484                 chunk = rchunk->rc_chunk;
 485                 hbh = NULL;
 486                 status = ocfs2_read_quota_block(lqinode,
 487                                                 ol_quota_chunk_block(sb, chunk),
 488                                                 &hbh);
 489                 if (status) {
 490                         mlog_errno(status);
 491                         break;
 492                 }
 493                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 494                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 495                         qbh = NULL;
 496                         status = ocfs2_read_quota_block(lqinode,
 497                                                 ol_dqblk_block(sb, chunk, bit),
 498                                                 &qbh);
 499                         if (status) {
 500                                 mlog_errno(status);
 501                                 break;
 502                         }
 503                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 504                                 ol_dqblk_block_off(sb, chunk, bit));
 505                         dquot = dqget(sb,
 506                                       make_kqid(&init_user_ns, type,
 507                                                 le64_to_cpu(dqblk->dqb_id)));
 508                         if (!dquot) {
 509                                 status = -EIO;
 510                                 mlog(ML_ERROR, "Failed to get quota structure "
 511                                      "for id %u, type %d. Cannot finish quota "
 512                                      "file recovery.\n",
 513                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
 514                                      type);
 515                                 goto out_put_bh;
 516                         }
 517                         status = ocfs2_lock_global_qf(oinfo, 1);
 518                         if (status < 0) {
 519                                 mlog_errno(status);
 520                                 goto out_put_dquot;
 521                         }
 522
 523                         handle = ocfs2_start_trans(OCFS2_SB(sb),
 524                                                    OCFS2_QSYNC_CREDITS);
 525                         if (IS_ERR(handle)) {
 526                                 status = PTR_ERR(handle);
 527                                 mlog_errno(status);
 528                                 goto out_drop_lock;
 529                         }
 530                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 531                         spin_lock(&dq_data_lock);
 532                         /* Add usage from quota entry into quota changes
 533                          * of our node. Auxiliary variables are important
 534                          * due to signedness */
 535                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 536                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 537                         dquot->dq_dqb.dqb_curspace += spacechange;
 538                         dquot->dq_dqb.dqb_curinodes += inodechange;
 539                         spin_unlock(&dq_data_lock);
 540                         /* We want to drop reference held by the crashed
 541                          * node. Since we have our own reference we know
 542                          * global structure actually won't be freed. */
 543                         status = ocfs2_global_release_dquot(dquot);
 544                         if (status < 0) {
 545                                 mlog_errno(status);
 546                                 goto out_commit;
 547                         }
 548                         /* Release local quota file entry */
 549                         status = ocfs2_journal_access_dq(handle,
 550                                         INODE_CACHE(lqinode),
 551                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 552                         if (status < 0) {
 553                                 mlog_errno(status);
 554                                 goto out_commit;
 555                         }
 556                         lock_buffer(qbh);
 557                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 558                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 559                         le32_add_cpu(&dchunk->dqc_free, 1);
 560                         unlock_buffer(qbh);
 561                         ocfs2_journal_dirty(handle, qbh);
 562 out_commit:
 563                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 564                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
 565 out_drop_lock:
 566                         ocfs2_unlock_global_qf(oinfo, 1);
 567 out_put_dquot:
 568                         dqput(dquot);
 569 out_put_bh:
 570                         brelse(qbh);
 571                         if (status < 0)
 572                                 break;
 573                 }
 574                 brelse(hbh);
 575                 list_del(&rchunk->rc_list);
 576                 kfree(rchunk->rc_bitmap);
 577                 kfree(rchunk);
 578                 if (status < 0)
 579                         break;
 580         }
 581         if (status < 0)
 582                 free_recovery_list(&(rec->r_list[type]));
 583         if (status)
 584                 mlog_errno(status);
 585         return status;
 586 }
 587
 588 /* Recover local quota files for given node different from us */
 589 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 590                                 struct ocfs2_quota_recovery *rec,
 591                                 int slot_num)
 592 {
 593         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 594                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 595         struct super_block *sb = osb->sb;
 596         struct ocfs2_local_disk_dqinfo *ldinfo;
 597         struct buffer_head *bh;
 598         handle_t *handle;
 599         int type;
 600         int status = 0;
 601         struct inode *lqinode;
 602         unsigned int flags;
 603
 604         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 605                "slot %u\n", osb->dev_str, slot_num);
 606
 607         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 608         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 609                 if (list_empty(&(rec->r_list[type])))
 610                         continue;
 611                 trace_ocfs2_finish_quota_recovery(slot_num);
 612                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 613                 if (!lqinode) {
 614                         status = -ENOENT;
 615                         goto out;
 616                 }
 617                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 618                                                        OCFS2_META_LOCK_NOQUEUE);
 619                 /* Someone else is holding the lock? Then he must be
 620                  * doing the recovery. Just skip the file... */
 621                 if (status == -EAGAIN) {
 622                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 623                                "device (%s) for slot %d because quota file is "
 624                                "locked.\n", osb->dev_str, slot_num);
 625                         status = 0;
 626                         goto out_put;
 627                 } else if (status < 0) {
 628                         mlog_errno(status);
 629                         goto out_put;
 630                 }
 631                 /* Now read local header */
 632                 bh = NULL;
 633                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
 634                 if (status) {
 635                         mlog_errno(status);
 636                         mlog(ML_ERROR, "failed to read quota file info header "
 637                                 "(slot=%d type=%d)\n", slot_num, type);
 638                         goto out_lock;
 639                 }
 640                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 641                                                         OCFS2_LOCAL_INFO_OFF);
 642                 /* Is recovery still needed? */
 643                 flags = le32_to_cpu(ldinfo->dqi_flags);
 644                 if (!(flags & OLQF_CLEAN))
 645                         status = ocfs2_recover_local_quota_file(lqinode,
 646                                                                 type,
 647                                                                 rec);
 648                 /* We don't want to mark file as clean when it is actually
 649                  * active */
 650                 if (slot_num == osb->slot_num)
 651                         goto out_bh;
 652                 /* Mark quota file as clean if we are recovering quota file of
 653                  * some other node. */
 654                 handle = ocfs2_start_trans(osb,
 655                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 656                 if (IS_ERR(handle)) {
 657                         status = PTR_ERR(handle);
 658                         mlog_errno(status);
 659                         goto out_bh;
 660                 }
 661                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 662                                                  bh,
 663                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 664                 if (status < 0) {
 665                         mlog_errno(status);
 666                         goto out_trans;
 667                 }
 668                 lock_buffer(bh);
 669                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 670                 unlock_buffer(bh);
 671                 ocfs2_journal_dirty(handle, bh);
 672 out_trans:
 673                 ocfs2_commit_trans(osb, handle);
 674 out_bh:
 675                 brelse(bh);
 676 out_lock:
 677                 ocfs2_inode_unlock(lqinode, 1);
 678 out_put:
 679                 iput(lqinode);
 680                 if (status < 0)
 681                         break;
 682         }
 683 out:
 684         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 685         kfree(rec);
 686         return status;
 687 }
 688
 689 /* Read information header from quota file */
 690 static int ocfs2_local_read_info(struct super_block *sb, int type)
 691 {
 692         struct ocfs2_local_disk_dqinfo *ldinfo;
 693         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 694         struct ocfs2_mem_dqinfo *oinfo;
 695         struct inode *lqinode = sb_dqopt(sb)->files[type];
 696         int status;
 697         struct buffer_head *bh = NULL;
 698         struct ocfs2_quota_recovery *rec;
 699         int locked = 0;
 700
 701         /* We don't need the lock and we have to acquire quota file locks
 702          * which will later depend on this lock */
 703         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 704         info->dqi_maxblimit = 0x7fffffffffffffffLL;
 705         info->dqi_maxilimit = 0x7fffffffffffffffLL;
 706         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 707         if (!oinfo) {
 708                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 709                                " info.");
 710                 goto out_err;
 711         }
 712         info->dqi_priv = oinfo;
 713         oinfo->dqi_type = type;
 714         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 715         oinfo->dqi_rec = NULL;
 716         oinfo->dqi_lqi_bh = NULL;
 717         oinfo->dqi_libh = NULL;
 718
 719         status = ocfs2_global_read_info(sb, type);
 720         if (status < 0)
 721                 goto out_err;
 722
 723         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 724         if (status < 0) {
 725                 mlog_errno(status);
 726                 goto out_err;
 727         }
 728         locked = 1;
 729
 730         /* Now read local header */
 731         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 732         if (status) {
 733                 mlog_errno(status);
 734                 mlog(ML_ERROR, "failed to read quota file info header "
 735                         "(type=%d)\n", type);
 736                 goto out_err;
 737         }
 738         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 739                                                 OCFS2_LOCAL_INFO_OFF);
 740         info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 741         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 742         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 743         oinfo->dqi_libh = bh;
 744
 745         /* We crashed when using local quota file? */
 746         if (!(info->dqi_flags & OLQF_CLEAN)) {
 747                 rec = OCFS2_SB(sb)->quota_rec;
 748                 if (!rec) {
 749                         rec = ocfs2_alloc_quota_recovery();
 750                         if (!rec) {
 751                                 status = -ENOMEM;
 752                                 mlog_errno(status);
 753                                 goto out_err;
 754                         }
 755                         OCFS2_SB(sb)->quota_rec = rec;
 756                 }
 757
 758                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 759                                                    &rec->r_list[type]);
 760                 if (status < 0) {
 761                         mlog_errno(status);
 762                         goto out_err;
 763                 }
 764         }
 765
 766         status = ocfs2_load_local_quota_bitmaps(lqinode,
 767                                                 ldinfo,
 768                                                 &oinfo->dqi_chunk);
 769         if (status < 0) {
 770                 mlog_errno(status);
 771                 goto out_err;
 772         }
 773
 774         /* Now mark quota file as used */
 775         info->dqi_flags &= ~OLQF_CLEAN;
 776         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 777         if (status < 0) {
 778                 mlog_errno(status);
 779                 goto out_err;
 780         }
 781
 782         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 783         return 0;
 784 out_err:
 785         if (oinfo) {
 786                 iput(oinfo->dqi_gqinode);
 787                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 788                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 789                 brelse(oinfo->dqi_lqi_bh);
 790                 if (locked)
 791                         ocfs2_inode_unlock(lqinode, 1);
 792                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 793                 kfree(oinfo);
 794         }
 795         brelse(bh);
 796         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 797         return -1;
 798 }
 799
 800 /* Write local info to quota file */
 801 static int ocfs2_local_write_info(struct super_block *sb, int type)
 802 {
 803         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 804         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 805                                                 ->dqi_libh;
 806         int status;
 807
 808         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 809                                  info);
 810         if (status < 0) {
 811                 mlog_errno(status);
 812                 return -1;
 813         }
 814
 815         return 0;
 816 }
 817
 818 /* Release info from memory */
 819 static int ocfs2_local_free_info(struct super_block *sb, int type)
 820 {
 821         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 822         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 823         struct ocfs2_quota_chunk *chunk;
 824         struct ocfs2_local_disk_chunk *dchunk;
 825         int mark_clean = 1, len;
 826         int status;
 827
 828         iput(oinfo->dqi_gqinode);
 829         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 830         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 831         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 832                 dchunk = (struct ocfs2_local_disk_chunk *)
 833                                         (chunk->qc_headerbh->b_data);
 834                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 835                         len = ol_chunk_entries(sb);
 836                 } else {
 837                         len = (oinfo->dqi_blocks -
 838                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 839                               * ol_quota_entries_per_block(sb);
 840                 }
 841                 /* Not all entries free? Bug! */
 842                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 843                         mlog(ML_ERROR, "releasing quota file with used "
 844                                         "entries (type=%d)\n", type);
 845                         mark_clean = 0;
 846                 }
 847         }
 848         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 849
 850         /* dqonoff_mutex protects us against racing with recovery thread... */
 851         if (oinfo->dqi_rec) {
 852                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 853                 mark_clean = 0;
 854         }
 855
 856         if (!mark_clean)
 857                 goto out;
 858
 859         /* Mark local file as clean */
 860         info->dqi_flags |= OLQF_CLEAN;
 861         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 862                                  oinfo->dqi_libh,
 863                                  olq_update_info,
 864                                  info);
 865         if (status < 0) {
 866                 mlog_errno(status);
 867                 goto out;
 868         }
 869
 870 out:
 871         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 872         brelse(oinfo->dqi_libh);
 873         brelse(oinfo->dqi_lqi_bh);
 874         kfree(oinfo);
 875         return 0;
 876 }
 877
 878 static void olq_set_dquot(struct buffer_head *bh, void *private)
 879 {
 880         struct ocfs2_dquot *od = private;
 881         struct ocfs2_local_disk_dqblk *dqblk;
 882         struct super_block *sb = od->dq_dquot.dq_sb;
 883
 884         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 885                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 886
 887         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
 888                                               od->dq_dquot.dq_id));
 889         spin_lock(&dq_data_lock);
 890         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 891                                           od->dq_origspace);
 892         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 893                                           od->dq_originodes);
 894         spin_unlock(&dq_data_lock);
 895         trace_olq_set_dquot(
 896                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 897                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 898                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
 899 }
 900
 901 /* Write dquot to local quota file */
 902 int ocfs2_local_write_dquot(struct dquot *dquot)
 903 {
 904         struct super_block *sb = dquot->dq_sb;
 905         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 906         struct buffer_head *bh;
 907         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
 908         int status;
 909
 910         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 911                                              &bh);
 912         if (status) {
 913                 mlog_errno(status);
 914                 goto out;
 915         }
 916         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 917         if (status < 0) {
 918                 mlog_errno(status);
 919                 goto out;
 920         }
 921 out:
 922         brelse(bh);
 923         return status;
 924 }
 925
 926 /* Find free entry in local quota file */
 927 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 928                                                        int type,
 929                                                        int *offset)
 930 {
 931         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 932         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 933         struct ocfs2_quota_chunk *chunk;
 934         struct ocfs2_local_disk_chunk *dchunk;
 935         int found = 0, len;
 936
 937         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 938                 dchunk = (struct ocfs2_local_disk_chunk *)
 939                                                 chunk->qc_headerbh->b_data;
 940                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
 941                         found = 1;
 942                         break;
 943                 }
 944         }
 945         if (!found)
 946                 return NULL;
 947
 948         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 949                 len = ol_chunk_entries(sb);
 950         } else {
 951                 len = (oinfo->dqi_blocks -
 952                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 953                       * ol_quota_entries_per_block(sb);
 954         }
 955
 956         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 957         /* We failed? */
 958         if (found == len) {
 959                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 960                      " entries free (type=%d)\n", chunk->qc_num,
 961                      le32_to_cpu(dchunk->dqc_free), type);
 962                 return ERR_PTR(-EIO);
 963         }
 964         *offset = found;
 965         return chunk;
 966 }
 967
 968 /* Add new chunk to the local quota file */
 969 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 970                                                         struct super_block *sb,
 971                                                         int type,
 972                                                         int *offset)
 973 {
 974         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 975         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 976         struct inode *lqinode = sb_dqopt(sb)->files[type];
 977         struct ocfs2_quota_chunk *chunk = NULL;
 978         struct ocfs2_local_disk_chunk *dchunk;
 979         int status;
 980         handle_t *handle;
 981         struct buffer_head *bh = NULL, *dbh = NULL;
 982         u64 p_blkno;
 983
 984         /* We are protected by dqio_sem so no locking needed */
 985         status = ocfs2_extend_no_holes(lqinode, NULL,
 986                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
 987                                        i_size_read(lqinode));
 988         if (status < 0) {
 989                 mlog_errno(status);
 990                 goto out;
 991         }
 992         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 993                                           i_size_read(lqinode) + 2 * sb->s_blocksize);
 994         if (status < 0) {
 995                 mlog_errno(status);
 996                 goto out;
 997         }
 998
 999         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
1000         if (!chunk) {
1001                 status = -ENOMEM;
1002                 mlog_errno(status);
1003                 goto out;
1004         }
1005         /* Local quota info and two new blocks we initialize */
1006         handle = ocfs2_start_trans(OCFS2_SB(sb),
1007                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1008                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1009         if (IS_ERR(handle)) {
1010                 status = PTR_ERR(handle);
1011                 mlog_errno(status);
1012                 goto out;
1013         }
1014
1015         /* Initialize chunk header */
1016         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1017                                              &p_blkno, NULL, NULL);
1018         if (status < 0) {
1019                 mlog_errno(status);
1020                 goto out_trans;
1021         }
1022         bh = sb_getblk(sb, p_blkno);
1023         if (!bh) {
1024                 status = -ENOMEM;
1025                 mlog_errno(status);
1026                 goto out_trans;
1027         }
1028         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1029         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1030         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1031                                          OCFS2_JOURNAL_ACCESS_CREATE);
1032         if (status < 0) {
1033                 mlog_errno(status);
1034                 goto out_trans;
1035         }
1036         lock_buffer(bh);
1037         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1038         memset(dchunk->dqc_bitmap, 0,
1039                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1040                OCFS2_QBLK_RESERVED_SPACE);
1041         unlock_buffer(bh);
1042         ocfs2_journal_dirty(handle, bh);
1043
1044         /* Initialize new block with structures */
1045         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1046                                              &p_blkno, NULL, NULL);
1047         if (status < 0) {
1048                 mlog_errno(status);
1049                 goto out_trans;
1050         }
1051         dbh = sb_getblk(sb, p_blkno);
1052         if (!dbh) {
1053                 status = -ENOMEM;
1054                 mlog_errno(status);
1055                 goto out_trans;
1056         }
1057         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1058         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1059                                          OCFS2_JOURNAL_ACCESS_CREATE);
1060         if (status < 0) {
1061                 mlog_errno(status);
1062                 goto out_trans;
1063         }
1064         lock_buffer(dbh);
1065         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1066         unlock_buffer(dbh);
1067         ocfs2_journal_dirty(handle, dbh);
1068
1069         /* Update local quotafile info */
1070         oinfo->dqi_blocks += 2;
1071         oinfo->dqi_chunks++;
1072         status = ocfs2_local_write_info(sb, type);
1073         if (status < 0) {
1074                 mlog_errno(status);
1075                 goto out_trans;
1076         }
1077         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1078         if (status < 0) {
1079                 mlog_errno(status);
1080                 goto out;
1081         }
1082
1083         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1084         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1085                                    struct ocfs2_quota_chunk,
1086                                    qc_chunk)->qc_num + 1;
1087         chunk->qc_headerbh = bh;
1088         *offset = 0;
1089         return chunk;
1090 out_trans:
1091         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1092 out:
1093         brelse(bh);
1094         brelse(dbh);
1095         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1096         return ERR_PTR(status);
1097 }
1098
1099 /* Find free entry in local quota file */
1100 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1101                                                        struct super_block *sb,
1102                                                        int type,
1103                                                        int *offset)
1104 {
1105         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1106         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1107         struct ocfs2_quota_chunk *chunk;
1108         struct inode *lqinode = sb_dqopt(sb)->files[type];
1109         struct ocfs2_local_disk_chunk *dchunk;
1110         int epb = ol_quota_entries_per_block(sb);
1111         unsigned int chunk_blocks;
1112         struct buffer_head *bh;
1113         u64 p_blkno;
1114         int status;
1115         handle_t *handle;
1116
1117         if (list_empty(&oinfo->dqi_chunk))
1118                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1119         /* Is the last chunk full? */
1120         chunk = list_entry(oinfo->dqi_chunk.prev,
1121                         struct ocfs2_quota_chunk, qc_chunk);
1122         chunk_blocks = oinfo->dqi_blocks -
1123                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1124         if (ol_chunk_blocks(sb) == chunk_blocks)
1125                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1126
1127         /* We are protected by dqio_sem so no locking needed */
1128         status = ocfs2_extend_no_holes(lqinode, NULL,
1129                                        i_size_read(lqinode) + sb->s_blocksize,
1130                                        i_size_read(lqinode));
1131         if (status < 0) {
1132                 mlog_errno(status);
1133                 goto out;
1134         }
1135         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1136                                           i_size_read(lqinode) + sb->s_blocksize);
1137         if (status < 0) {
1138                 mlog_errno(status);
1139                 goto out;
1140         }
1141
1142         /* Get buffer from the just added block */
1143         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1144                                              &p_blkno, NULL, NULL);
1145         if (status < 0) {
1146                 mlog_errno(status);
1147                 goto out;
1148         }
1149         bh = sb_getblk(sb, p_blkno);
1150         if (!bh) {
1151                 status = -ENOMEM;
1152                 mlog_errno(status);
1153                 goto out;
1154         }
1155         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1156
1157         /* Local quota info, chunk header and the new block we initialize */
1158         handle = ocfs2_start_trans(OCFS2_SB(sb),
1159                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1160                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1161         if (IS_ERR(handle)) {
1162                 status = PTR_ERR(handle);
1163                 mlog_errno(status);
1164                 goto out;
1165         }
1166         /* Zero created block */
1167         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1168                                  OCFS2_JOURNAL_ACCESS_CREATE);
1169         if (status < 0) {
1170                 mlog_errno(status);
1171                 goto out_trans;
1172         }
1173         lock_buffer(bh);
1174         memset(bh->b_data, 0, sb->s_blocksize);
1175         unlock_buffer(bh);
1176         ocfs2_journal_dirty(handle, bh);
1177
1178         /* Update chunk header */
1179         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1180                                          chunk->qc_headerbh,
1181                                  OCFS2_JOURNAL_ACCESS_WRITE);
1182         if (status < 0) {
1183                 mlog_errno(status);
1184                 goto out_trans;
1185         }
1186
1187         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1188         lock_buffer(chunk->qc_headerbh);
1189         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1190         unlock_buffer(chunk->qc_headerbh);
1191         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1192
1193         /* Update file header */
1194         oinfo->dqi_blocks++;
1195         status = ocfs2_local_write_info(sb, type);
1196         if (status < 0) {
1197                 mlog_errno(status);
1198                 goto out_trans;
1199         }
1200
1201         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1202         if (status < 0) {
1203                 mlog_errno(status);
1204                 goto out;
1205         }
1206         *offset = chunk_blocks * epb;
1207         return chunk;
1208 out_trans:
1209         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1210 out:
1211         return ERR_PTR(status);
1212 }
1213
1214 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1215 {
1216         int *offset = private;
1217         struct ocfs2_local_disk_chunk *dchunk;
1218
1219         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1220         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1221         le32_add_cpu(&dchunk->dqc_free, -1);
1222 }
1223
1224 /* Create dquot in the local file for given id */
1225 int ocfs2_create_local_dquot(struct dquot *dquot)
1226 {
1227         struct super_block *sb = dquot->dq_sb;
1228         int type = dquot->dq_id.type;
1229         struct inode *lqinode = sb_dqopt(sb)->files[type];
1230         struct ocfs2_quota_chunk *chunk;
1231         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1232         int offset;
1233         int status;
1234         u64 pcount;
1235
1236         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1237         chunk = ocfs2_find_free_entry(sb, type, &offset);
1238         if (!chunk) {
1239                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1240                 if (IS_ERR(chunk)) {
1241                         status = PTR_ERR(chunk);
1242                         goto out;
1243                 }
1244         } else if (IS_ERR(chunk)) {
1245                 status = PTR_ERR(chunk);
1246                 goto out;
1247         }
1248         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1249         od->dq_chunk = chunk;
1250         status = ocfs2_extent_map_get_blocks(lqinode,
1251                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1252                                      &od->dq_local_phys_blk,
1253                                      &pcount,
1254                                      NULL);
1255
1256         /* Initialize dquot structure on disk */
1257         status = ocfs2_local_write_dquot(dquot);
1258         if (status < 0) {
1259                 mlog_errno(status);
1260                 goto out;
1261         }
1262
1263         /* Mark structure as allocated */
1264         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1265                                  &offset);
1266         if (status < 0) {
1267                 mlog_errno(status);
1268                 goto out;
1269         }
1270 out:
1271         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1272         return status;
1273 }
1274
1275 /*
1276  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1277  * already started a transaction and written all changes to global quota file
1278  */
1279 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1280 {
1281         int status;
1282         int type = dquot->dq_id.type;
1283         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1284         struct super_block *sb = dquot->dq_sb;
1285         struct ocfs2_local_disk_chunk *dchunk;
1286         int offset;
1287
1288         status = ocfs2_journal_access_dq(handle,
1289                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1290                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1291         if (status < 0) {
1292                 mlog_errno(status);
1293                 goto out;
1294         }
1295         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1296                                              od->dq_local_off);
1297         dchunk = (struct ocfs2_local_disk_chunk *)
1298                         (od->dq_chunk->qc_headerbh->b_data);
1299         /* Mark structure as freed */
1300         lock_buffer(od->dq_chunk->qc_headerbh);
1301         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1302         le32_add_cpu(&dchunk->dqc_free, 1);
1303         unlock_buffer(od->dq_chunk->qc_headerbh);
1304         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1305
1306 out:
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 };