fs/ocfs2/quota

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This source file includes following definitions.
ol_quota_entries_per_block
ol_chunk_blocks
ol_chunk_entries
ol_quota_chunk_block
ol_dqblk_block
ol_dqblk_block_off
ol_dqblk_off
ol_dqblk_block_offset
ol_dqblk_chunk_off
ocfs2_modify_bh
ocfs2_read_quota_block
ocfs2_local_check_quota_file
ocfs2_release_local_quota_bitmaps
ocfs2_load_local_quota_bitmaps
olq_update_info
ocfs2_add_recovery_chunk
free_recovery_list
ocfs2_free_quota_recovery
ocfs2_recovery_load_quota
ocfs2_alloc_quota_recovery
ocfs2_begin_quota_recovery
ocfs2_recover_local_quota_file
ocfs2_finish_quota_recovery
ocfs2_local_read_info
ocfs2_local_write_info
ocfs2_local_free_info
olq_set_dquot
ocfs2_local_write_dquot
ocfs2_find_free_entry
ocfs2_local_quota_add_chunk
ocfs2_extend_local_quota_file
olq_alloc_dquot
ocfs2_create_local_dquot
ocfs2_local_release_dquot
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  Implementation of operations over local quota file
   4  */
   5 
   6 #include <linux/fs.h>
   7 #include <linux/slab.h>
   8 #include <linux/quota.h>
   9 #include <linux/quotaops.h>
  10 #include <linux/module.h>
  11 
  12 #include <cluster/masklog.h>
  13 
  14 #include "ocfs2_fs.h"
  15 #include "ocfs2.h"
  16 #include "inode.h"
  17 #include "alloc.h"
  18 #include "file.h"
  19 #include "buffer_head_io.h"
  20 #include "journal.h"
  21 #include "sysfile.h"
  22 #include "dlmglue.h"
  23 #include "quota.h"
  24 #include "uptodate.h"
  25 #include "super.h"
  26 #include "ocfs2_trace.h"
  27 
  28 /* Number of local quota structures per block */
  29 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
  30 {
  31         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
  32                 sizeof(struct ocfs2_local_disk_dqblk));
  33 }
  34 
  35 /* Number of blocks with entries in one chunk */
  36 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
  37 {
  38         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
  39                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
  40                ol_quota_entries_per_block(sb);
  41 }
  42 
  43 /* Number of entries in a chunk bitmap */
  44 static unsigned int ol_chunk_entries(struct super_block *sb)
  45 {
  46         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
  47 }
  48 
  49 /* Offset of the chunk in quota file */
  50 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
  51 {
  52         /* 1 block for local quota file info, 1 block per chunk for chunk info */
  53         return 1 + (ol_chunk_blocks(sb) + 1) * c;
  54 }
  55 
  56 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
  57 {
  58         int epb = ol_quota_entries_per_block(sb);
  59 
  60         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
  61 }
  62 
  63 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
  64 {
  65         int epb = ol_quota_entries_per_block(sb);
  66 
  67         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
  68 }
  69 
  70 /* Offset of the dquot structure in the quota file */
  71 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
  72 {
  73         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
  74                ol_dqblk_block_off(sb, c, off);
  75 }
  76 
  77 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
  78 {
  79         return off & ((1 << sb->s_blocksize_bits) - 1);
  80 }
  81 
  82 /* Compute offset in the chunk of a structure with the given offset */
  83 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
  84 {
  85         int epb = ol_quota_entries_per_block(sb);
  86 
  87         return ((off >> sb->s_blocksize_bits) -
  88                         ol_quota_chunk_block(sb, c) - 1) * epb
  89                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
  90                  sizeof(struct ocfs2_local_disk_dqblk);
  91 }
  92 
  93 /* Write bufferhead into the fs */
  94 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
  95                 void (*modify)(struct buffer_head *, void *), void *private)
  96 {
  97         struct super_block *sb = inode->i_sb;
  98         handle_t *handle;
  99         int status;
 100 
 101         handle = ocfs2_start_trans(OCFS2_SB(sb),
 102                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 103         if (IS_ERR(handle)) {
 104                 status = PTR_ERR(handle);
 105                 mlog_errno(status);
 106                 return status;
 107         }
 108         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
 109                                          OCFS2_JOURNAL_ACCESS_WRITE);
 110         if (status < 0) {
 111                 mlog_errno(status);
 112                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
 113                 return status;
 114         }
 115         lock_buffer(bh);
 116         modify(bh, private);
 117         unlock_buffer(bh);
 118         ocfs2_journal_dirty(handle, bh);
 119 
 120         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
 121         if (status < 0) {
 122                 mlog_errno(status);
 123                 return status;
 124         }
 125         return 0;
 126 }
 127 
 128 /*
 129  * Read quota block from a given logical offset.
 130  *
 131  * This function acquires ip_alloc_sem and thus it must not be called with a
 132  * transaction started.
 133  */
 134 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
 135                                   struct buffer_head **bh)
 136 {
 137         int rc = 0;
 138         struct buffer_head *tmp = *bh;
 139 
 140         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block)
 141                 return ocfs2_error(inode->i_sb,
 142                                 "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
 143                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 144                                 (unsigned long long)v_block,
 145                                 (unsigned long long)i_size_read(inode));
 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(&dquot->dq_dqb_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(&dquot->dq_dqb_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         info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
 695         info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
 696         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 697         if (!oinfo) {
 698                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 699                                " info.");
 700                 goto out_err;
 701         }
 702         info->dqi_priv = oinfo;
 703         oinfo->dqi_type = type;
 704         INIT_LIST_HEAD(&oinfo->dqi_chunk);
 705         oinfo->dqi_rec = NULL;
 706         oinfo->dqi_lqi_bh = NULL;
 707         oinfo->dqi_libh = NULL;
 708 
 709         status = ocfs2_global_read_info(sb, type);
 710         if (status < 0)
 711                 goto out_err;
 712 
 713         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 714         if (status < 0) {
 715                 mlog_errno(status);
 716                 goto out_err;
 717         }
 718         locked = 1;
 719 
 720         /* Now read local header */
 721         status = ocfs2_read_quota_block(lqinode, 0, &bh);
 722         if (status) {
 723                 mlog_errno(status);
 724                 mlog(ML_ERROR, "failed to read quota file info header "
 725                         "(type=%d)\n", type);
 726                 goto out_err;
 727         }
 728         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 729                                                 OCFS2_LOCAL_INFO_OFF);
 730         oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 731         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 732         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 733         oinfo->dqi_libh = bh;
 734 
 735         /* We crashed when using local quota file? */
 736         if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
 737                 rec = OCFS2_SB(sb)->quota_rec;
 738                 if (!rec) {
 739                         rec = ocfs2_alloc_quota_recovery();
 740                         if (!rec) {
 741                                 status = -ENOMEM;
 742                                 mlog_errno(status);
 743                                 goto out_err;
 744                         }
 745                         OCFS2_SB(sb)->quota_rec = rec;
 746                 }
 747 
 748                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 749                                                    &rec->r_list[type]);
 750                 if (status < 0) {
 751                         mlog_errno(status);
 752                         goto out_err;
 753                 }
 754         }
 755 
 756         status = ocfs2_load_local_quota_bitmaps(lqinode,
 757                                                 ldinfo,
 758                                                 &oinfo->dqi_chunk);
 759         if (status < 0) {
 760                 mlog_errno(status);
 761                 goto out_err;
 762         }
 763 
 764         /* Now mark quota file as used */
 765         oinfo->dqi_flags &= ~OLQF_CLEAN;
 766         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 767         if (status < 0) {
 768                 mlog_errno(status);
 769                 goto out_err;
 770         }
 771 
 772         return 0;
 773 out_err:
 774         if (oinfo) {
 775                 iput(oinfo->dqi_gqinode);
 776                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 777                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 778                 brelse(oinfo->dqi_lqi_bh);
 779                 if (locked)
 780                         ocfs2_inode_unlock(lqinode, 1);
 781                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 782                 kfree(oinfo);
 783         }
 784         brelse(bh);
 785         return -1;
 786 }
 787 
 788 /* Write local info to quota file */
 789 static int ocfs2_local_write_info(struct super_block *sb, int type)
 790 {
 791         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 792         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 793                                                 ->dqi_libh;
 794         int status;
 795 
 796         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 797                                  info);
 798         if (status < 0) {
 799                 mlog_errno(status);
 800                 return -1;
 801         }
 802 
 803         return 0;
 804 }
 805 
 806 /* Release info from memory */
 807 static int ocfs2_local_free_info(struct super_block *sb, int type)
 808 {
 809         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 810         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 811         struct ocfs2_quota_chunk *chunk;
 812         struct ocfs2_local_disk_chunk *dchunk;
 813         int mark_clean = 1, len;
 814         int status;
 815 
 816         iput(oinfo->dqi_gqinode);
 817         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 818         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 819         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 820                 dchunk = (struct ocfs2_local_disk_chunk *)
 821                                         (chunk->qc_headerbh->b_data);
 822                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 823                         len = ol_chunk_entries(sb);
 824                 } else {
 825                         len = (oinfo->dqi_blocks -
 826                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 827                               * ol_quota_entries_per_block(sb);
 828                 }
 829                 /* Not all entries free? Bug! */
 830                 if (le32_to_cpu(dchunk->dqc_free) != len) {
 831                         mlog(ML_ERROR, "releasing quota file with used "
 832                                         "entries (type=%d)\n", type);
 833                         mark_clean = 0;
 834                 }
 835         }
 836         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 837 
 838         /*
 839          * s_umount held in exclusive mode protects us against racing with
 840          * recovery thread...
 841          */
 842         if (oinfo->dqi_rec) {
 843                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
 844                 mark_clean = 0;
 845         }
 846 
 847         if (!mark_clean)
 848                 goto out;
 849 
 850         /* Mark local file as clean */
 851         oinfo->dqi_flags |= OLQF_CLEAN;
 852         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 853                                  oinfo->dqi_libh,
 854                                  olq_update_info,
 855                                  info);
 856         if (status < 0) {
 857                 mlog_errno(status);
 858                 goto out;
 859         }
 860 
 861 out:
 862         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 863         brelse(oinfo->dqi_libh);
 864         brelse(oinfo->dqi_lqi_bh);
 865         kfree(oinfo);
 866         return 0;
 867 }
 868 
 869 static void olq_set_dquot(struct buffer_head *bh, void *private)
 870 {
 871         struct ocfs2_dquot *od = private;
 872         struct ocfs2_local_disk_dqblk *dqblk;
 873         struct super_block *sb = od->dq_dquot.dq_sb;
 874 
 875         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 876                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 877 
 878         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
 879                                               od->dq_dquot.dq_id));
 880         spin_lock(&od->dq_dquot.dq_dqb_lock);
 881         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 882                                           od->dq_origspace);
 883         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 884                                           od->dq_originodes);
 885         spin_unlock(&od->dq_dquot.dq_dqb_lock);
 886         trace_olq_set_dquot(
 887                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 888                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 889                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
 890 }
 891 
 892 /* Write dquot to local quota file */
 893 int ocfs2_local_write_dquot(struct dquot *dquot)
 894 {
 895         struct super_block *sb = dquot->dq_sb;
 896         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 897         struct buffer_head *bh;
 898         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
 899         int status;
 900 
 901         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 902                                              &bh);
 903         if (status) {
 904                 mlog_errno(status);
 905                 goto out;
 906         }
 907         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 908         if (status < 0) {
 909                 mlog_errno(status);
 910                 goto out;
 911         }
 912 out:
 913         brelse(bh);
 914         return status;
 915 }
 916 
 917 /* Find free entry in local quota file */
 918 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 919                                                        int type,
 920                                                        int *offset)
 921 {
 922         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 923         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 924         struct ocfs2_quota_chunk *chunk;
 925         struct ocfs2_local_disk_chunk *dchunk;
 926         int found = 0, len;
 927 
 928         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 929                 dchunk = (struct ocfs2_local_disk_chunk *)
 930                                                 chunk->qc_headerbh->b_data;
 931                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
 932                         found = 1;
 933                         break;
 934                 }
 935         }
 936         if (!found)
 937                 return NULL;
 938 
 939         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 940                 len = ol_chunk_entries(sb);
 941         } else {
 942                 len = (oinfo->dqi_blocks -
 943                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 944                       * ol_quota_entries_per_block(sb);
 945         }
 946 
 947         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 948         /* We failed? */
 949         if (found == len) {
 950                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 951                      " entries free (type=%d)\n", chunk->qc_num,
 952                      le32_to_cpu(dchunk->dqc_free), type);
 953                 return ERR_PTR(-EIO);
 954         }
 955         *offset = found;
 956         return chunk;
 957 }
 958 
 959 /* Add new chunk to the local quota file */
 960 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 961                                                         struct super_block *sb,
 962                                                         int type,
 963                                                         int *offset)
 964 {
 965         struct mem_dqinfo *info = sb_dqinfo(sb, type);
 966         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 967         struct inode *lqinode = sb_dqopt(sb)->files[type];
 968         struct ocfs2_quota_chunk *chunk = NULL;
 969         struct ocfs2_local_disk_chunk *dchunk;
 970         int status;
 971         handle_t *handle;
 972         struct buffer_head *bh = NULL, *dbh = NULL;
 973         u64 p_blkno;
 974 
 975         /* We are protected by dqio_sem so no locking needed */
 976         status = ocfs2_extend_no_holes(lqinode, NULL,
 977                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
 978                                        i_size_read(lqinode));
 979         if (status < 0) {
 980                 mlog_errno(status);
 981                 goto out;
 982         }
 983         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 984                                           i_size_read(lqinode) + 2 * sb->s_blocksize);
 985         if (status < 0) {
 986                 mlog_errno(status);
 987                 goto out;
 988         }
 989 
 990         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 991         if (!chunk) {
 992                 status = -ENOMEM;
 993                 mlog_errno(status);
 994                 goto out;
 995         }
 996         /* Local quota info and two new blocks we initialize */
 997         handle = ocfs2_start_trans(OCFS2_SB(sb),
 998                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
 999                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1000         if (IS_ERR(handle)) {
1001                 status = PTR_ERR(handle);
1002                 mlog_errno(status);
1003                 goto out;
1004         }
1005 
1006         /* Initialize chunk header */
1007         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1008                                              &p_blkno, NULL, NULL);
1009         if (status < 0) {
1010                 mlog_errno(status);
1011                 goto out_trans;
1012         }
1013         bh = sb_getblk(sb, p_blkno);
1014         if (!bh) {
1015                 status = -ENOMEM;
1016                 mlog_errno(status);
1017                 goto out_trans;
1018         }
1019         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1020         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1021         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1022                                          OCFS2_JOURNAL_ACCESS_CREATE);
1023         if (status < 0) {
1024                 mlog_errno(status);
1025                 goto out_trans;
1026         }
1027         lock_buffer(bh);
1028         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1029         memset(dchunk->dqc_bitmap, 0,
1030                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1031                OCFS2_QBLK_RESERVED_SPACE);
1032         unlock_buffer(bh);
1033         ocfs2_journal_dirty(handle, bh);
1034 
1035         /* Initialize new block with structures */
1036         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1037                                              &p_blkno, NULL, NULL);
1038         if (status < 0) {
1039                 mlog_errno(status);
1040                 goto out_trans;
1041         }
1042         dbh = sb_getblk(sb, p_blkno);
1043         if (!dbh) {
1044                 status = -ENOMEM;
1045                 mlog_errno(status);
1046                 goto out_trans;
1047         }
1048         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1049         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1050                                          OCFS2_JOURNAL_ACCESS_CREATE);
1051         if (status < 0) {
1052                 mlog_errno(status);
1053                 goto out_trans;
1054         }
1055         lock_buffer(dbh);
1056         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1057         unlock_buffer(dbh);
1058         ocfs2_journal_dirty(handle, dbh);
1059 
1060         /* Update local quotafile info */
1061         oinfo->dqi_blocks += 2;
1062         oinfo->dqi_chunks++;
1063         status = ocfs2_local_write_info(sb, type);
1064         if (status < 0) {
1065                 mlog_errno(status);
1066                 goto out_trans;
1067         }
1068         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1069         if (status < 0) {
1070                 mlog_errno(status);
1071                 goto out;
1072         }
1073 
1074         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1075         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1076                                    struct ocfs2_quota_chunk,
1077                                    qc_chunk)->qc_num + 1;
1078         chunk->qc_headerbh = bh;
1079         *offset = 0;
1080         return chunk;
1081 out_trans:
1082         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1083 out:
1084         brelse(bh);
1085         brelse(dbh);
1086         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1087         return ERR_PTR(status);
1088 }
1089 
1090 /* Find free entry in local quota file */
1091 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1092                                                        struct super_block *sb,
1093                                                        int type,
1094                                                        int *offset)
1095 {
1096         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1097         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1098         struct ocfs2_quota_chunk *chunk;
1099         struct inode *lqinode = sb_dqopt(sb)->files[type];
1100         struct ocfs2_local_disk_chunk *dchunk;
1101         int epb = ol_quota_entries_per_block(sb);
1102         unsigned int chunk_blocks;
1103         struct buffer_head *bh;
1104         u64 p_blkno;
1105         int status;
1106         handle_t *handle;
1107 
1108         if (list_empty(&oinfo->dqi_chunk))
1109                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1110         /* Is the last chunk full? */
1111         chunk = list_entry(oinfo->dqi_chunk.prev,
1112                         struct ocfs2_quota_chunk, qc_chunk);
1113         chunk_blocks = oinfo->dqi_blocks -
1114                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1115         if (ol_chunk_blocks(sb) == chunk_blocks)
1116                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1117 
1118         /* We are protected by dqio_sem so no locking needed */
1119         status = ocfs2_extend_no_holes(lqinode, NULL,
1120                                        i_size_read(lqinode) + sb->s_blocksize,
1121                                        i_size_read(lqinode));
1122         if (status < 0) {
1123                 mlog_errno(status);
1124                 goto out;
1125         }
1126         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1127                                           i_size_read(lqinode) + sb->s_blocksize);
1128         if (status < 0) {
1129                 mlog_errno(status);
1130                 goto out;
1131         }
1132 
1133         /* Get buffer from the just added block */
1134         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1135                                              &p_blkno, NULL, NULL);
1136         if (status < 0) {
1137                 mlog_errno(status);
1138                 goto out;
1139         }
1140         bh = sb_getblk(sb, p_blkno);
1141         if (!bh) {
1142                 status = -ENOMEM;
1143                 mlog_errno(status);
1144                 goto out;
1145         }
1146         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1147 
1148         /* Local quota info, chunk header and the new block we initialize */
1149         handle = ocfs2_start_trans(OCFS2_SB(sb),
1150                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1151                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1152         if (IS_ERR(handle)) {
1153                 status = PTR_ERR(handle);
1154                 mlog_errno(status);
1155                 goto out;
1156         }
1157         /* Zero created block */
1158         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1159                                  OCFS2_JOURNAL_ACCESS_CREATE);
1160         if (status < 0) {
1161                 mlog_errno(status);
1162                 goto out_trans;
1163         }
1164         lock_buffer(bh);
1165         memset(bh->b_data, 0, sb->s_blocksize);
1166         unlock_buffer(bh);
1167         ocfs2_journal_dirty(handle, bh);
1168 
1169         /* Update chunk header */
1170         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1171                                          chunk->qc_headerbh,
1172                                  OCFS2_JOURNAL_ACCESS_WRITE);
1173         if (status < 0) {
1174                 mlog_errno(status);
1175                 goto out_trans;
1176         }
1177 
1178         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1179         lock_buffer(chunk->qc_headerbh);
1180         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1181         unlock_buffer(chunk->qc_headerbh);
1182         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1183 
1184         /* Update file header */
1185         oinfo->dqi_blocks++;
1186         status = ocfs2_local_write_info(sb, type);
1187         if (status < 0) {
1188                 mlog_errno(status);
1189                 goto out_trans;
1190         }
1191 
1192         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1193         if (status < 0) {
1194                 mlog_errno(status);
1195                 goto out;
1196         }
1197         *offset = chunk_blocks * epb;
1198         return chunk;
1199 out_trans:
1200         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201 out:
1202         return ERR_PTR(status);
1203 }
1204 
1205 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1206 {
1207         int *offset = private;
1208         struct ocfs2_local_disk_chunk *dchunk;
1209 
1210         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1211         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1212         le32_add_cpu(&dchunk->dqc_free, -1);
1213 }
1214 
1215 /* Create dquot in the local file for given id */
1216 int ocfs2_create_local_dquot(struct dquot *dquot)
1217 {
1218         struct super_block *sb = dquot->dq_sb;
1219         int type = dquot->dq_id.type;
1220         struct inode *lqinode = sb_dqopt(sb)->files[type];
1221         struct ocfs2_quota_chunk *chunk;
1222         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1223         int offset;
1224         int status;
1225         u64 pcount;
1226 
1227         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1228         chunk = ocfs2_find_free_entry(sb, type, &offset);
1229         if (!chunk) {
1230                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1231                 if (IS_ERR(chunk)) {
1232                         status = PTR_ERR(chunk);
1233                         goto out;
1234                 }
1235         } else if (IS_ERR(chunk)) {
1236                 status = PTR_ERR(chunk);
1237                 goto out;
1238         }
1239         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1240         od->dq_chunk = chunk;
1241         status = ocfs2_extent_map_get_blocks(lqinode,
1242                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1243                                      &od->dq_local_phys_blk,
1244                                      &pcount,
1245                                      NULL);
1246 
1247         /* Initialize dquot structure on disk */
1248         status = ocfs2_local_write_dquot(dquot);
1249         if (status < 0) {
1250                 mlog_errno(status);
1251                 goto out;
1252         }
1253 
1254         /* Mark structure as allocated */
1255         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1256                                  &offset);
1257         if (status < 0) {
1258                 mlog_errno(status);
1259                 goto out;
1260         }
1261 out:
1262         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1263         return status;
1264 }
1265 
1266 /*
1267  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1268  * already started a transaction and written all changes to global quota file
1269  */
1270 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1271 {
1272         int status;
1273         int type = dquot->dq_id.type;
1274         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1275         struct super_block *sb = dquot->dq_sb;
1276         struct ocfs2_local_disk_chunk *dchunk;
1277         int offset;
1278 
1279         status = ocfs2_journal_access_dq(handle,
1280                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1281                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1282         if (status < 0) {
1283                 mlog_errno(status);
1284                 goto out;
1285         }
1286         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1287                                              od->dq_local_off);
1288         dchunk = (struct ocfs2_local_disk_chunk *)
1289                         (od->dq_chunk->qc_headerbh->b_data);
1290         /* Mark structure as freed */
1291         lock_buffer(od->dq_chunk->qc_headerbh);
1292         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1293         le32_add_cpu(&dchunk->dqc_free, 1);
1294         unlock_buffer(od->dq_chunk->qc_headerbh);
1295         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1296 
1297 out:
1298         return status;
1299 }
1300 
1301 static const struct quota_format_ops ocfs2_format_ops = {
1302         .check_quota_file       = ocfs2_local_check_quota_file,
1303         .read_file_info         = ocfs2_local_read_info,
1304         .write_file_info        = ocfs2_global_write_info,
1305         .free_file_info         = ocfs2_local_free_info,
1306 };
1307 
1308 struct quota_format_type ocfs2_quota_format = {
1309         .qf_fmt_id = QFMT_OCFS2,
1310         .qf_ops = &ocfs2_format_ops,
1311         .qf_owner = THIS_MODULE
1312 };
/* [<][>][^][v][top][bottom][index][help] */
root/fs/ocfs2/quota_local.c

DEFINITIONS
