linux/fs/ocfs2/quota_local.c
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   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 */
  28static 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 */
  35static 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 */
  43static 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 */
  49static 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
  55static 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
  62static 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 */
  70static 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 */
  77static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
  78{
  79        return off >> sb->s_blocksize_bits;
  80}
  81
  82static 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 */
  88static 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 */
  99static 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 */
 139static 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 */
 167static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
 168{
 169        unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 170        unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 171        unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 172        unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 173        unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
 174                                        GROUP_QUOTA_SYSTEM_INODE };
 175        struct buffer_head *bh = NULL;
 176        struct inode *linode = sb_dqopt(sb)->files[type];
 177        struct inode *ginode = NULL;
 178        struct ocfs2_disk_dqheader *dqhead;
 179        int status, ret = 0;
 180
 181        /* First check whether we understand local quota file */
 182        status = ocfs2_read_quota_block(linode, 0, &bh);
 183        if (status) {
 184                mlog_errno(status);
 185                mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
 186                        type);
 187                goto out_err;
 188        }
 189        dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 190        if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
 191                mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
 192                        " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
 193                        lmagics[type], type);
 194                goto out_err;
 195        }
 196        if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
 197                mlog(ML_ERROR, "quota file version does not match (%u != %u),"
 198                        " type=%d\n", le32_to_cpu(dqhead->dqh_version),
 199                        lversions[type], type);
 200                goto out_err;
 201        }
 202        brelse(bh);
 203        bh = NULL;
 204
 205        /* Next check whether we understand global quota file */
 206        ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
 207                                                OCFS2_INVALID_SLOT);
 208        if (!ginode) {
 209                mlog(ML_ERROR, "cannot get global quota file inode "
 210                                "(type=%d)\n", type);
 211                goto out_err;
 212        }
 213        /* Since the header is read only, we don't care about locking */
 214        status = ocfs2_read_quota_block(ginode, 0, &bh);
 215        if (status) {
 216                mlog_errno(status);
 217                mlog(ML_ERROR, "failed to read global quota file header "
 218                                "(type=%d)\n", type);
 219                goto out_err;
 220        }
 221        dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 222        if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
 223                mlog(ML_ERROR, "global quota file magic does not match "
 224                        "(%u != %u), type=%d\n",
 225                        le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
 226                goto out_err;
 227        }
 228        if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
 229                mlog(ML_ERROR, "global quota file version does not match "
 230                        "(%u != %u), type=%d\n",
 231                        le32_to_cpu(dqhead->dqh_version), gversions[type],
 232                        type);
 233                goto out_err;
 234        }
 235
 236        ret = 1;
 237out_err:
 238        brelse(bh);
 239        iput(ginode);
 240        return ret;
 241}
 242
 243/* Release given list of quota file chunks */
 244static 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 */
 256static 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
 286static 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
 301static 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
 323static 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
 335void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
 336{
 337        int type;
 338
 339        for (type = 0; type < MAXQUOTAS; type++)
 340                free_recovery_list(&(rec->r_list[type]));
 341        kfree(rec);
 342}
 343
 344/* Load entries in our quota file we have to recover*/
 345static 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
 377static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
 378{
 379        int type;
 380        struct ocfs2_quota_recovery *rec;
 381
 382        rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
 383        if (!rec)
 384                return NULL;
 385        for (type = 0; type < MAXQUOTAS; type++)
 386                INIT_LIST_HEAD(&(rec->r_list[type]));
 387        return rec;
 388}
 389
 390/* Load information we need for quota recovery into memory */
 391struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
 392                                                struct ocfs2_super *osb,
 393                                                int slot_num)
 394{
 395        unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 396                                            OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 397        unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 398                                        LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 399        struct super_block *sb = osb->sb;
 400        struct ocfs2_local_disk_dqinfo *ldinfo;
 401        struct inode *lqinode;
 402        struct buffer_head *bh;
 403        int type;
 404        int status = 0;
 405        struct ocfs2_quota_recovery *rec;
 406
 407        printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 408               "slot %u\n", osb->dev_str, slot_num);
 409
 410        rec = ocfs2_alloc_quota_recovery();
 411        if (!rec)
 412                return ERR_PTR(-ENOMEM);
 413        /* First init... */
 414
 415        for (type = 0; type < MAXQUOTAS; type++) {
 416                if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 417                        continue;
 418                /* At this point, journal of the slot is already replayed so
 419                 * we can trust metadata and data of the quota file */
 420                lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 421                if (!lqinode) {
 422                        status = -ENOENT;
 423                        goto out;
 424                }
 425                status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 426                                               OCFS2_META_LOCK_RECOVERY);
 427                if (status < 0) {
 428                        mlog_errno(status);
 429                        goto out_put;
 430                }
 431                /* Now read local header */
 432                bh = NULL;
 433                status = ocfs2_read_quota_block(lqinode, 0, &bh);
 434                if (status) {
 435                        mlog_errno(status);
 436                        mlog(ML_ERROR, "failed to read quota file info header "
 437                                "(slot=%d type=%d)\n", slot_num, type);
 438                        goto out_lock;
 439                }
 440                ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 441                                                        OCFS2_LOCAL_INFO_OFF);
 442                status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 443                                                   &rec->r_list[type]);
 444                brelse(bh);
 445out_lock:
 446                ocfs2_inode_unlock(lqinode, 1);
 447out_put:
 448                iput(lqinode);
 449                if (status < 0)
 450                        break;
 451        }
 452out:
 453        if (status < 0) {
 454                ocfs2_free_quota_recovery(rec);
 455                rec = ERR_PTR(status);
 456        }
 457        return rec;
 458}
 459
 460/* Sync changes in local quota file into global quota file and
 461 * reinitialize local quota file.
 462 * The function expects local quota file to be already locked and
 463 * dqonoff_mutex locked. */
 464static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 465                                          int type,
 466                                          struct ocfs2_quota_recovery *rec)
 467{
 468        struct super_block *sb = lqinode->i_sb;
 469        struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 470        struct ocfs2_local_disk_chunk *dchunk;
 471        struct ocfs2_local_disk_dqblk *dqblk;
 472        struct dquot *dquot;
 473        handle_t *handle;
 474        struct buffer_head *hbh = NULL, *qbh = NULL;
 475        int status = 0;
 476        int bit, chunk;
 477        struct ocfs2_recovery_chunk *rchunk, *next;
 478        qsize_t spacechange, inodechange;
 479
 480        trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 481
 482        list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 483                chunk = rchunk->rc_chunk;
 484                hbh = NULL;
 485                status = ocfs2_read_quota_block(lqinode,
 486                                                ol_quota_chunk_block(sb, chunk),
 487                                                &hbh);
 488                if (status) {
 489                        mlog_errno(status);
 490                        break;
 491                }
 492                dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 493                for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 494                        qbh = NULL;
 495                        status = ocfs2_read_quota_block(lqinode,
 496                                                ol_dqblk_block(sb, chunk, bit),
 497                                                &qbh);
 498                        if (status) {
 499                                mlog_errno(status);
 500                                break;
 501                        }
 502                        dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 503                                ol_dqblk_block_off(sb, chunk, bit));
 504                        dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
 505                        if (!dquot) {
 506                                status = -EIO;
 507                                mlog(ML_ERROR, "Failed to get quota structure "
 508                                     "for id %u, type %d. Cannot finish quota "
 509                                     "file recovery.\n",
 510                                     (unsigned)le64_to_cpu(dqblk->dqb_id),
 511                                     type);
 512                                goto out_put_bh;
 513                        }
 514                        status = ocfs2_lock_global_qf(oinfo, 1);
 515                        if (status < 0) {
 516                                mlog_errno(status);
 517                                goto out_put_dquot;
 518                        }
 519
 520                        handle = ocfs2_start_trans(OCFS2_SB(sb),
 521                                                   OCFS2_QSYNC_CREDITS);
 522                        if (IS_ERR(handle)) {
 523                                status = PTR_ERR(handle);
 524                                mlog_errno(status);
 525                                goto out_drop_lock;
 526                        }
 527                        mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 528                        spin_lock(&dq_data_lock);
 529                        /* Add usage from quota entry into quota changes
 530                         * of our node. Auxiliary variables are important
 531                         * due to signedness */
 532                        spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 533                        inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 534                        dquot->dq_dqb.dqb_curspace += spacechange;
 535                        dquot->dq_dqb.dqb_curinodes += inodechange;
 536                        spin_unlock(&dq_data_lock);
 537                        /* We want to drop reference held by the crashed
 538                         * node. Since we have our own reference we know
 539                         * global structure actually won't be freed. */
 540                        status = ocfs2_global_release_dquot(dquot);
 541                        if (status < 0) {
 542                                mlog_errno(status);
 543                                goto out_commit;
 544                        }
 545                        /* Release local quota file entry */
 546                        status = ocfs2_journal_access_dq(handle,
 547                                        INODE_CACHE(lqinode),
 548                                        qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 549                        if (status < 0) {
 550                                mlog_errno(status);
 551                                goto out_commit;
 552                        }
 553                        lock_buffer(qbh);
 554                        WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 555                        ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 556                        le32_add_cpu(&dchunk->dqc_free, 1);
 557                        unlock_buffer(qbh);
 558                        ocfs2_journal_dirty(handle, qbh);
 559out_commit:
 560                        mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 561                        ocfs2_commit_trans(OCFS2_SB(sb), handle);
 562out_drop_lock:
 563                        ocfs2_unlock_global_qf(oinfo, 1);
 564out_put_dquot:
 565                        dqput(dquot);
 566out_put_bh:
 567                        brelse(qbh);
 568                        if (status < 0)
 569                                break;
 570                }
 571                brelse(hbh);
 572                list_del(&rchunk->rc_list);
 573                kfree(rchunk->rc_bitmap);
 574                kfree(rchunk);
 575                if (status < 0)
 576                        break;
 577        }
 578        if (status < 0)
 579                free_recovery_list(&(rec->r_list[type]));
 580        if (status)
 581                mlog_errno(status);
 582        return status;
 583}
 584
 585/* Recover local quota files for given node different from us */
 586int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 587                                struct ocfs2_quota_recovery *rec,
 588                                int slot_num)
 589{
 590        unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 591                                        LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 592        struct super_block *sb = osb->sb;
 593        struct ocfs2_local_disk_dqinfo *ldinfo;
 594        struct buffer_head *bh;
 595        handle_t *handle;
 596        int type;
 597        int status = 0;
 598        struct inode *lqinode;
 599        unsigned int flags;
 600
 601        printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 602               "slot %u\n", osb->dev_str, slot_num);
 603
 604        mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 605        for (type = 0; type < MAXQUOTAS; type++) {
 606                if (list_empty(&(rec->r_list[type])))
 607                        continue;
 608                trace_ocfs2_finish_quota_recovery(slot_num);
 609                lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 610                if (!lqinode) {
 611                        status = -ENOENT;
 612                        goto out;
 613                }
 614                status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 615                                                       OCFS2_META_LOCK_NOQUEUE);
 616                /* Someone else is holding the lock? Then he must be
 617                 * doing the recovery. Just skip the file... */
 618                if (status == -EAGAIN) {
 619                        printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 620                               "device (%s) for slot %d because quota file is "
 621                               "locked.\n", osb->dev_str, slot_num);
 622                        status = 0;
 623                        goto out_put;
 624                } else if (status < 0) {
 625                        mlog_errno(status);
 626                        goto out_put;
 627                }
 628                /* Now read local header */
 629                bh = NULL;
 630                status = ocfs2_read_quota_block(lqinode, 0, &bh);
 631                if (status) {
 632                        mlog_errno(status);
 633                        mlog(ML_ERROR, "failed to read quota file info header "
 634                                "(slot=%d type=%d)\n", slot_num, type);
 635                        goto out_lock;
 636                }
 637                ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 638                                                        OCFS2_LOCAL_INFO_OFF);
 639                /* Is recovery still needed? */
 640                flags = le32_to_cpu(ldinfo->dqi_flags);
 641                if (!(flags & OLQF_CLEAN))
 642                        status = ocfs2_recover_local_quota_file(lqinode,
 643                                                                type,
 644                                                                rec);
 645                /* We don't want to mark file as clean when it is actually
 646                 * active */
 647                if (slot_num == osb->slot_num)
 648                        goto out_bh;
 649                /* Mark quota file as clean if we are recovering quota file of
 650                 * some other node. */
 651                handle = ocfs2_start_trans(osb,
 652                                           OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 653                if (IS_ERR(handle)) {
 654                        status = PTR_ERR(handle);
 655                        mlog_errno(status);
 656                        goto out_bh;
 657                }
 658                status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 659                                                 bh,
 660                                                 OCFS2_JOURNAL_ACCESS_WRITE);
 661                if (status < 0) {
 662                        mlog_errno(status);
 663                        goto out_trans;
 664                }
 665                lock_buffer(bh);
 666                ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 667                unlock_buffer(bh);
 668                ocfs2_journal_dirty(handle, bh);
 669out_trans:
 670                ocfs2_commit_trans(osb, handle);
 671out_bh:
 672                brelse(bh);
 673out_lock:
 674                ocfs2_inode_unlock(lqinode, 1);
 675out_put:
 676                iput(lqinode);
 677                if (status < 0)
 678                        break;
 679        }
 680out:
 681        mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 682        kfree(rec);
 683        return status;
 684}
 685
 686/* Read information header from quota file */
 687static int ocfs2_local_read_info(struct super_block *sb, int type)
 688{
 689        struct ocfs2_local_disk_dqinfo *ldinfo;
 690        struct mem_dqinfo *info = sb_dqinfo(sb, type);
 691        struct ocfs2_mem_dqinfo *oinfo;
 692        struct inode *lqinode = sb_dqopt(sb)->files[type];
 693        int status;
 694        struct buffer_head *bh = NULL;
 695        struct ocfs2_quota_recovery *rec;
 696        int locked = 0;
 697
 698        /* We don't need the lock and we have to acquire quota file locks
 699         * which will later depend on this lock */
 700        mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
 701        info->dqi_maxblimit = 0x7fffffffffffffffLL;
 702        info->dqi_maxilimit = 0x7fffffffffffffffLL;
 703        oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 704        if (!oinfo) {
 705                mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 706                               " info.");
 707                goto out_err;
 708        }
 709        info->dqi_priv = oinfo;
 710        oinfo->dqi_type = type;
 711        INIT_LIST_HEAD(&oinfo->dqi_chunk);
 712        oinfo->dqi_rec = NULL;
 713        oinfo->dqi_lqi_bh = NULL;
 714        oinfo->dqi_libh = NULL;
 715
 716        status = ocfs2_global_read_info(sb, type);
 717        if (status < 0)
 718                goto out_err;
 719
 720        status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 721        if (status < 0) {
 722                mlog_errno(status);
 723                goto out_err;
 724        }
 725        locked = 1;
 726
 727        /* Now read local header */
 728        status = ocfs2_read_quota_block(lqinode, 0, &bh);
 729        if (status) {
 730                mlog_errno(status);
 731                mlog(ML_ERROR, "failed to read quota file info header "
 732                        "(type=%d)\n", type);
 733                goto out_err;
 734        }
 735        ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 736                                                OCFS2_LOCAL_INFO_OFF);
 737        info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 738        oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 739        oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 740        oinfo->dqi_libh = bh;
 741
 742        /* We crashed when using local quota file? */
 743        if (!(info->dqi_flags & OLQF_CLEAN)) {
 744                rec = OCFS2_SB(sb)->quota_rec;
 745                if (!rec) {
 746                        rec = ocfs2_alloc_quota_recovery();
 747                        if (!rec) {
 748                                status = -ENOMEM;
 749                                mlog_errno(status);
 750                                goto out_err;
 751                        }
 752                        OCFS2_SB(sb)->quota_rec = rec;
 753                }
 754
 755                status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 756                                                   &rec->r_list[type]);
 757                if (status < 0) {
 758                        mlog_errno(status);
 759                        goto out_err;
 760                }
 761        }
 762
 763        status = ocfs2_load_local_quota_bitmaps(lqinode,
 764                                                ldinfo,
 765                                                &oinfo->dqi_chunk);
 766        if (status < 0) {
 767                mlog_errno(status);
 768                goto out_err;
 769        }
 770
 771        /* Now mark quota file as used */
 772        info->dqi_flags &= ~OLQF_CLEAN;
 773        status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 774        if (status < 0) {
 775                mlog_errno(status);
 776                goto out_err;
 777        }
 778
 779        mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 780        return 0;
 781out_err:
 782        if (oinfo) {
 783                iput(oinfo->dqi_gqinode);
 784                ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 785                ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 786                brelse(oinfo->dqi_lqi_bh);
 787                if (locked)
 788                        ocfs2_inode_unlock(lqinode, 1);
 789                ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 790                kfree(oinfo);
 791        }
 792        brelse(bh);
 793        mutex_lock(&sb_dqopt(sb)->dqio_mutex);
 794        return -1;
 795}
 796
 797/* Write local info to quota file */
 798static int ocfs2_local_write_info(struct super_block *sb, int type)
 799{
 800        struct mem_dqinfo *info = sb_dqinfo(sb, type);
 801        struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 802                                                ->dqi_libh;
 803        int status;
 804
 805        status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 806                                 info);
 807        if (status < 0) {
 808                mlog_errno(status);
 809                return -1;
 810        }
 811
 812        return 0;
 813}
 814
 815/* Release info from memory */
 816static int ocfs2_local_free_info(struct super_block *sb, int type)
 817{
 818        struct mem_dqinfo *info = sb_dqinfo(sb, type);
 819        struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 820        struct ocfs2_quota_chunk *chunk;
 821        struct ocfs2_local_disk_chunk *dchunk;
 822        int mark_clean = 1, len;
 823        int status;
 824
 825        iput(oinfo->dqi_gqinode);
 826        ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 827        ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 828        list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 829                dchunk = (struct ocfs2_local_disk_chunk *)
 830                                        (chunk->qc_headerbh->b_data);
 831                if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 832                        len = ol_chunk_entries(sb);
 833                } else {
 834                        len = (oinfo->dqi_blocks -
 835                               ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 836                              * ol_quota_entries_per_block(sb);
 837                }
 838                /* Not all entries free? Bug! */
 839                if (le32_to_cpu(dchunk->dqc_free) != len) {
 840                        mlog(ML_ERROR, "releasing quota file with used "
 841                                        "entries (type=%d)\n", type);
 842                        mark_clean = 0;
 843                }
 844        }
 845        ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 846
 847        /* dqonoff_mutex protects us against racing with recovery thread... */
 848        if (oinfo->dqi_rec) {
 849                ocfs2_free_quota_recovery(oinfo->dqi_rec);
 850                mark_clean = 0;
 851        }
 852
 853        if (!mark_clean)
 854                goto out;
 855
 856        /* Mark local file as clean */
 857        info->dqi_flags |= OLQF_CLEAN;
 858        status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 859                                 oinfo->dqi_libh,
 860                                 olq_update_info,
 861                                 info);
 862        if (status < 0) {
 863                mlog_errno(status);
 864                goto out;
 865        }
 866
 867out:
 868        ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 869        brelse(oinfo->dqi_libh);
 870        brelse(oinfo->dqi_lqi_bh);
 871        kfree(oinfo);
 872        return 0;
 873}
 874
 875static void olq_set_dquot(struct buffer_head *bh, void *private)
 876{
 877        struct ocfs2_dquot *od = private;
 878        struct ocfs2_local_disk_dqblk *dqblk;
 879        struct super_block *sb = od->dq_dquot.dq_sb;
 880
 881        dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 882                + ol_dqblk_block_offset(sb, od->dq_local_off));
 883
 884        dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
 885        spin_lock(&dq_data_lock);
 886        dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 887                                          od->dq_origspace);
 888        dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 889                                          od->dq_originodes);
 890        spin_unlock(&dq_data_lock);
 891        trace_olq_set_dquot(
 892                (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 893                (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 894                od->dq_dquot.dq_id);
 895}
 896
 897/* Write dquot to local quota file */
 898int ocfs2_local_write_dquot(struct dquot *dquot)
 899{
 900        struct super_block *sb = dquot->dq_sb;
 901        struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 902        struct buffer_head *bh;
 903        struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
 904        int status;
 905
 906        status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 907                                             &bh);
 908        if (status) {
 909                mlog_errno(status);
 910                goto out;
 911        }
 912        status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 913        if (status < 0) {
 914                mlog_errno(status);
 915                goto out;
 916        }
 917out:
 918        brelse(bh);
 919        return status;
 920}
 921
 922/* Find free entry in local quota file */
 923static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 924                                                       int type,
 925                                                       int *offset)
 926{
 927        struct mem_dqinfo *info = sb_dqinfo(sb, type);
 928        struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 929        struct ocfs2_quota_chunk *chunk;
 930        struct ocfs2_local_disk_chunk *dchunk;
 931        int found = 0, len;
 932
 933        list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 934                dchunk = (struct ocfs2_local_disk_chunk *)
 935                                                chunk->qc_headerbh->b_data;
 936                if (le32_to_cpu(dchunk->dqc_free) > 0) {
 937                        found = 1;
 938                        break;
 939                }
 940        }
 941        if (!found)
 942                return NULL;
 943
 944        if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 945                len = ol_chunk_entries(sb);
 946        } else {
 947                len = (oinfo->dqi_blocks -
 948                       ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 949                      * ol_quota_entries_per_block(sb);
 950        }
 951
 952        found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 953        /* We failed? */
 954        if (found == len) {
 955                mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 956                     " entries free (type=%d)\n", chunk->qc_num,
 957                     le32_to_cpu(dchunk->dqc_free), type);
 958                return ERR_PTR(-EIO);
 959        }
 960        *offset = found;
 961        return chunk;
 962}
 963
 964/* Add new chunk to the local quota file */
 965static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 966                                                        struct super_block *sb,
 967                                                        int type,
 968                                                        int *offset)
 969{
 970        struct mem_dqinfo *info = sb_dqinfo(sb, type);
 971        struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 972        struct inode *lqinode = sb_dqopt(sb)->files[type];
 973        struct ocfs2_quota_chunk *chunk = NULL;
 974        struct ocfs2_local_disk_chunk *dchunk;
 975        int status;
 976        handle_t *handle;
 977        struct buffer_head *bh = NULL, *dbh = NULL;
 978        u64 p_blkno;
 979
 980        /* We are protected by dqio_sem so no locking needed */
 981        status = ocfs2_extend_no_holes(lqinode, NULL,
 982                                       lqinode->i_size + 2 * sb->s_blocksize,
 983                                       lqinode->i_size);
 984        if (status < 0) {
 985                mlog_errno(status);
 986                goto out;
 987        }
 988        status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 989                                          lqinode->i_size + 2 * sb->s_blocksize);
 990        if (status < 0) {
 991                mlog_errno(status);
 992                goto out;
 993        }
 994
 995        chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 996        if (!chunk) {
 997                status = -ENOMEM;
 998                mlog_errno(status);
 999                goto out;
1000        }
1001        /* Local quota info and two new blocks we initialize */
1002        handle = ocfs2_start_trans(OCFS2_SB(sb),
1003                        OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1004                        2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1005        if (IS_ERR(handle)) {
1006                status = PTR_ERR(handle);
1007                mlog_errno(status);
1008                goto out;
1009        }
1010
1011        /* Initialize chunk header */
1012        status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1013                                             &p_blkno, NULL, NULL);
1014        if (status < 0) {
1015                mlog_errno(status);
1016                goto out_trans;
1017        }
1018        bh = sb_getblk(sb, p_blkno);
1019        if (!bh) {
1020                status = -ENOMEM;
1021                mlog_errno(status);
1022                goto out_trans;
1023        }
1024        dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1025        ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1026        status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1027                                         OCFS2_JOURNAL_ACCESS_CREATE);
1028        if (status < 0) {
1029                mlog_errno(status);
1030                goto out_trans;
1031        }
1032        lock_buffer(bh);
1033        dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1034        memset(dchunk->dqc_bitmap, 0,
1035               sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1036               OCFS2_QBLK_RESERVED_SPACE);
1037        unlock_buffer(bh);
1038        ocfs2_journal_dirty(handle, bh);
1039
1040        /* Initialize new block with structures */
1041        status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1042                                             &p_blkno, NULL, NULL);
1043        if (status < 0) {
1044                mlog_errno(status);
1045                goto out_trans;
1046        }
1047        dbh = sb_getblk(sb, p_blkno);
1048        if (!dbh) {
1049                status = -ENOMEM;
1050                mlog_errno(status);
1051                goto out_trans;
1052        }
1053        ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1054        status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1055                                         OCFS2_JOURNAL_ACCESS_CREATE);
1056        if (status < 0) {
1057                mlog_errno(status);
1058                goto out_trans;
1059        }
1060        lock_buffer(dbh);
1061        memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1062        unlock_buffer(dbh);
1063        ocfs2_journal_dirty(handle, dbh);
1064
1065        /* Update local quotafile info */
1066        oinfo->dqi_blocks += 2;
1067        oinfo->dqi_chunks++;
1068        status = ocfs2_local_write_info(sb, type);
1069        if (status < 0) {
1070                mlog_errno(status);
1071                goto out_trans;
1072        }
1073        status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1074        if (status < 0) {
1075                mlog_errno(status);
1076                goto out;
1077        }
1078
1079        list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1080        chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1081                                   struct ocfs2_quota_chunk,
1082                                   qc_chunk)->qc_num + 1;
1083        chunk->qc_headerbh = bh;
1084        *offset = 0;
1085        return chunk;
1086out_trans:
1087        ocfs2_commit_trans(OCFS2_SB(sb), handle);
1088out:
1089        brelse(bh);
1090        brelse(dbh);
1091        kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1092        return ERR_PTR(status);
1093}
1094
1095/* Find free entry in local quota file */
1096static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1097                                                       struct super_block *sb,
1098                                                       int type,
1099                                                       int *offset)
1100{
1101        struct mem_dqinfo *info = sb_dqinfo(sb, type);
1102        struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1103        struct ocfs2_quota_chunk *chunk;
1104        struct inode *lqinode = sb_dqopt(sb)->files[type];
1105        struct ocfs2_local_disk_chunk *dchunk;
1106        int epb = ol_quota_entries_per_block(sb);
1107        unsigned int chunk_blocks;
1108        struct buffer_head *bh;
1109        u64 p_blkno;
1110        int status;
1111        handle_t *handle;
1112
1113        if (list_empty(&oinfo->dqi_chunk))
1114                return ocfs2_local_quota_add_chunk(sb, type, offset);
1115        /* Is the last chunk full? */
1116        chunk = list_entry(oinfo->dqi_chunk.prev,
1117                        struct ocfs2_quota_chunk, qc_chunk);
1118        chunk_blocks = oinfo->dqi_blocks -
1119                        ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1120        if (ol_chunk_blocks(sb) == chunk_blocks)
1121                return ocfs2_local_quota_add_chunk(sb, type, offset);
1122
1123        /* We are protected by dqio_sem so no locking needed */
1124        status = ocfs2_extend_no_holes(lqinode, NULL,
1125                                       lqinode->i_size + sb->s_blocksize,
1126                                       lqinode->i_size);
1127        if (status < 0) {
1128                mlog_errno(status);
1129                goto out;
1130        }
1131        status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132                                          lqinode->i_size + sb->s_blocksize);
1133        if (status < 0) {
1134                mlog_errno(status);
1135                goto out;
1136        }
1137
1138        /* Get buffer from the just added block */
1139        status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1140                                             &p_blkno, NULL, NULL);
1141        if (status < 0) {
1142                mlog_errno(status);
1143                goto out;
1144        }
1145        bh = sb_getblk(sb, p_blkno);
1146        if (!bh) {
1147                status = -ENOMEM;
1148                mlog_errno(status);
1149                goto out;
1150        }
1151        ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1152
1153        /* Local quota info, chunk header and the new block we initialize */
1154        handle = ocfs2_start_trans(OCFS2_SB(sb),
1155                        OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1156                        2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1157        if (IS_ERR(handle)) {
1158                status = PTR_ERR(handle);
1159                mlog_errno(status);
1160                goto out;
1161        }
1162        /* Zero created block */
1163        status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1164                                 OCFS2_JOURNAL_ACCESS_CREATE);
1165        if (status < 0) {
1166                mlog_errno(status);
1167                goto out_trans;
1168        }
1169        lock_buffer(bh);
1170        memset(bh->b_data, 0, sb->s_blocksize);
1171        unlock_buffer(bh);
1172        ocfs2_journal_dirty(handle, bh);
1173
1174        /* Update chunk header */
1175        status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1176                                         chunk->qc_headerbh,
1177                                 OCFS2_JOURNAL_ACCESS_WRITE);
1178        if (status < 0) {
1179                mlog_errno(status);
1180                goto out_trans;
1181        }
1182
1183        dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1184        lock_buffer(chunk->qc_headerbh);
1185        le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1186        unlock_buffer(chunk->qc_headerbh);
1187        ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1188
1189        /* Update file header */
1190        oinfo->dqi_blocks++;
1191        status = ocfs2_local_write_info(sb, type);
1192        if (status < 0) {
1193                mlog_errno(status);
1194                goto out_trans;
1195        }
1196
1197        status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1198        if (status < 0) {
1199                mlog_errno(status);
1200                goto out;
1201        }
1202        *offset = chunk_blocks * epb;
1203        return chunk;
1204out_trans:
1205        ocfs2_commit_trans(OCFS2_SB(sb), handle);
1206out:
1207        return ERR_PTR(status);
1208}
1209
1210static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1211{
1212        int *offset = private;
1213        struct ocfs2_local_disk_chunk *dchunk;
1214
1215        dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1216        ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1217        le32_add_cpu(&dchunk->dqc_free, -1);
1218}
1219
1220/* Create dquot in the local file for given id */
1221int ocfs2_create_local_dquot(struct dquot *dquot)
1222{
1223        struct super_block *sb = dquot->dq_sb;
1224        int type = dquot->dq_type;
1225        struct inode *lqinode = sb_dqopt(sb)->files[type];
1226        struct ocfs2_quota_chunk *chunk;
1227        struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1228        int offset;
1229        int status;
1230        u64 pcount;
1231
1232        down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1233        chunk = ocfs2_find_free_entry(sb, type, &offset);
1234        if (!chunk) {
1235                chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1236                if (IS_ERR(chunk)) {
1237                        status = PTR_ERR(chunk);
1238                        goto out;
1239                }
1240        } else if (IS_ERR(chunk)) {
1241                status = PTR_ERR(chunk);
1242                goto out;
1243        }
1244        od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1245        od->dq_chunk = chunk;
1246        status = ocfs2_extent_map_get_blocks(lqinode,
1247                                     ol_dqblk_block(sb, chunk->qc_num, offset),
1248                                     &od->dq_local_phys_blk,
1249                                     &pcount,
1250                                     NULL);
1251
1252        /* Initialize dquot structure on disk */
1253        status = ocfs2_local_write_dquot(dquot);
1254        if (status < 0) {
1255                mlog_errno(status);
1256                goto out;
1257        }
1258
1259        /* Mark structure as allocated */
1260        status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1261                                 &offset);
1262        if (status < 0) {
1263                mlog_errno(status);
1264                goto out;
1265        }
1266out:
1267        up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1268        return status;
1269}
1270
1271/*
1272 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1273 * already started a transaction and written all changes to global quota file
1274 */
1275int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1276{
1277        int status;
1278        int type = dquot->dq_type;
1279        struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1280        struct super_block *sb = dquot->dq_sb;
1281        struct ocfs2_local_disk_chunk *dchunk;
1282        int offset;
1283
1284        status = ocfs2_journal_access_dq(handle,
1285                        INODE_CACHE(sb_dqopt(sb)->files[type]),
1286                        od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1287        if (status < 0) {
1288                mlog_errno(status);
1289                goto out;
1290        }
1291        offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1292                                             od->dq_local_off);
1293        dchunk = (struct ocfs2_local_disk_chunk *)
1294                        (od->dq_chunk->qc_headerbh->b_data);
1295        /* Mark structure as freed */
1296        lock_buffer(od->dq_chunk->qc_headerbh);
1297        ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1298        le32_add_cpu(&dchunk->dqc_free, 1);
1299        unlock_buffer(od->dq_chunk->qc_headerbh);
1300        ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1301
1302out:
1303        /* Clear the read bit so that next time someone uses this
1304         * dquot he reads fresh info from disk and allocates local
1305         * dquot structure */
1306        clear_bit(DQ_READ_B, &dquot->dq_flags);
1307        return status;
1308}
1309
1310static 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
1317struct quota_format_type ocfs2_quota_format = {
1318        .qf_fmt_id = QFMT_OCFS2,
1319        .qf_ops = &ocfs2_format_ops,
1320        .qf_owner = THIS_MODULE
1321};
1322
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