/* * Implementation of operations over local quota file */ #include <linux/fs.h> #include <linux/quota.h> #include <linux/quotaops.h> #include <linux/module.h> #define MLOG_MASK_PREFIX ML_QUOTA #include <cluster/masklog.h> #include "ocfs2_fs.h" #include "ocfs2.h" #include "inode.h" #include "alloc.h" #include "file.h" #include "buffer_head_io.h" #include "journal.h" #include "sysfile.h" #include "dlmglue.h" #include "quota.h" #include "uptodate.h" /* Number of local quota structures per block */ static inline unsigned int ol_quota_entries_per_block(struct super_block *sb) { return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) / sizeof(struct ocfs2_local_disk_dqblk)); } /* Number of blocks with entries in one chunk */ static inline unsigned int ol_chunk_blocks(struct super_block *sb) { return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) - OCFS2_QBLK_RESERVED_SPACE) << 3) / ol_quota_entries_per_block(sb); } /* Number of entries in a chunk bitmap */ static unsigned int ol_chunk_entries(struct super_block *sb) { return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb); } /* Offset of the chunk in quota file */ static unsigned int ol_quota_chunk_block(struct super_block *sb, int c) { /* 1 block for local quota file info, 1 block per chunk for chunk info */ return 1 + (ol_chunk_blocks(sb) + 1) * c; } static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off) { int epb = ol_quota_entries_per_block(sb); return ol_quota_chunk_block(sb, c) + 1 + off / epb; } static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off) { int epb = ol_quota_entries_per_block(sb); return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk); } /* Offset of the dquot structure in the quota file */ static loff_t ol_dqblk_off(struct super_block *sb, int c, int off) { return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) + ol_dqblk_block_off(sb, c, off); } /* Compute block number from given offset */ static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off) { return off >> sb->s_blocksize_bits; } static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off) { return off & ((1 << sb->s_blocksize_bits) - 1); } /* Compute offset in the chunk of a structure with the given offset */ static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off) { int epb = ol_quota_entries_per_block(sb); return ((off >> sb->s_blocksize_bits) - ol_quota_chunk_block(sb, c) - 1) * epb + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) / sizeof(struct ocfs2_local_disk_dqblk); } /* Write bufferhead into the fs */ static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh, void (*modify)(struct buffer_head *, void *), void *private) { struct super_block *sb = inode->i_sb; handle_t *handle; int status; handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QUOTA_BLOCK_UPDATE_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); mlog_errno(status); return status; } status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); ocfs2_commit_trans(OCFS2_SB(sb), handle); return status; } lock_buffer(bh); modify(bh, private); unlock_buffer(bh); status = ocfs2_journal_dirty(handle, bh); if (status < 0) { mlog_errno(status); ocfs2_commit_trans(OCFS2_SB(sb), handle); return status; } status = ocfs2_commit_trans(OCFS2_SB(sb), handle); if (status < 0) { mlog_errno(status); return status; } return 0; } /* Check whether we understand format of quota files */ static int ocfs2_local_check_quota_file(struct super_block *sb, int type) { unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS; unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS; unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS; unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS; unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, GROUP_QUOTA_SYSTEM_INODE }; struct buffer_head *bh = NULL; struct inode *linode = sb_dqopt(sb)->files[type]; struct inode *ginode = NULL; struct ocfs2_disk_dqheader *dqhead; int status, ret = 0; /* First check whether we understand local quota file */ status = ocfs2_read_quota_block(linode, 0, &bh); if (status) { mlog_errno(status); mlog(ML_ERROR, "failed to read quota file header (type=%d)\n", type); goto out_err; } dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data); if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) { mlog(ML_ERROR, "quota file magic does not match (%u != %u)," " type=%d\n", le32_to_cpu(dqhead->dqh_magic), lmagics[type], type); goto out_err; } if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) { mlog(ML_ERROR, "quota file version does not match (%u != %u)," " type=%d\n", le32_to_cpu(dqhead->dqh_version), lversions[type], type); goto out_err; } brelse(bh); bh = NULL; /* Next check whether we understand global quota file */ ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], OCFS2_INVALID_SLOT); if (!ginode) { mlog(ML_ERROR, "cannot get global quota file inode " "(type=%d)\n", type); goto out_err; } /* Since the header is read only, we don't care about locking */ status = ocfs2_read_quota_block(ginode, 0, &bh); if (status) { mlog_errno(status); mlog(ML_ERROR, "failed to read global quota file header " "(type=%d)\n", type); goto out_err; } dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data); if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) { mlog(ML_ERROR, "global quota file magic does not match " "(%u != %u), type=%d\n", le32_to_cpu(dqhead->dqh_magic), gmagics[type], type); goto out_err; } if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) { mlog(ML_ERROR, "global quota file version does not match " "(%u != %u), type=%d\n", le32_to_cpu(dqhead->dqh_version), gversions[type], type); goto out_err; } ret = 1; out_err: brelse(bh); iput(ginode); return ret; } /* Release given list of quota file chunks */ static void ocfs2_release_local_quota_bitmaps(struct list_head *head) { struct ocfs2_quota_chunk *pos, *next; list_for_each_entry_safe(pos, next, head, qc_chunk) { list_del(&pos->qc_chunk); brelse(pos->qc_headerbh); kmem_cache_free(ocfs2_qf_chunk_cachep, pos); } } /* Load quota bitmaps into memory */ static int ocfs2_load_local_quota_bitmaps(struct inode *inode, struct ocfs2_local_disk_dqinfo *ldinfo, struct list_head *head) { struct ocfs2_quota_chunk *newchunk; int i, status; INIT_LIST_HEAD(head); for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) { newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS); if (!newchunk) { ocfs2_release_local_quota_bitmaps(head); return -ENOMEM; } newchunk->qc_num = i; newchunk->qc_headerbh = NULL; status = ocfs2_read_quota_block(inode, ol_quota_chunk_block(inode->i_sb, i), &newchunk->qc_headerbh); if (status) { mlog_errno(status); kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk); ocfs2_release_local_quota_bitmaps(head); return status; } list_add_tail(&newchunk->qc_chunk, head); } return 0; } static void olq_update_info(struct buffer_head *bh, void *private) { struct mem_dqinfo *info = private; struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; struct ocfs2_local_disk_dqinfo *ldinfo; ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + OCFS2_LOCAL_INFO_OFF); spin_lock(&dq_data_lock); ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK); ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks); ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks); spin_unlock(&dq_data_lock); } static int ocfs2_add_recovery_chunk(struct super_block *sb, struct ocfs2_local_disk_chunk *dchunk, int chunk, struct list_head *head) { struct ocfs2_recovery_chunk *rc; rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS); if (!rc) return -ENOMEM; rc->rc_chunk = chunk; rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS); if (!rc->rc_bitmap) { kfree(rc); return -ENOMEM; } memcpy(rc->rc_bitmap, dchunk->dqc_bitmap, (ol_chunk_entries(sb) + 7) >> 3); list_add_tail(&rc->rc_list, head); return 0; } static void free_recovery_list(struct list_head *head) { struct ocfs2_recovery_chunk *next; struct ocfs2_recovery_chunk *rchunk; list_for_each_entry_safe(rchunk, next, head, rc_list) { list_del(&rchunk->rc_list); kfree(rchunk->rc_bitmap); kfree(rchunk); } } void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec) { int type; for (type = 0; type < MAXQUOTAS; type++) free_recovery_list(&(rec->r_list[type])); kfree(rec); } /* Load entries in our quota file we have to recover*/ static int ocfs2_recovery_load_quota(struct inode *lqinode, struct ocfs2_local_disk_dqinfo *ldinfo, int type, struct list_head *head) { struct super_block *sb = lqinode->i_sb; struct buffer_head *hbh; struct ocfs2_local_disk_chunk *dchunk; int i, chunks = le32_to_cpu(ldinfo->dqi_chunks); int status = 0; for (i = 0; i < chunks; i++) { hbh = NULL; status = ocfs2_read_quota_block(lqinode, ol_quota_chunk_block(sb, i), &hbh); if (status) { mlog_errno(status); break; } dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data; if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb)) status = ocfs2_add_recovery_chunk(sb, dchunk, i, head); brelse(hbh); if (status < 0) break; } if (status < 0) free_recovery_list(head); return status; } static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void) { int type; struct ocfs2_quota_recovery *rec; rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS); if (!rec) return NULL; for (type = 0; type < MAXQUOTAS; type++) INIT_LIST_HEAD(&(rec->r_list[type])); return rec; } /* Load information we need for quota recovery into memory */ struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( struct ocfs2_super *osb, int slot_num) { unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, LOCAL_GROUP_QUOTA_SYSTEM_INODE }; struct super_block *sb = osb->sb; struct ocfs2_local_disk_dqinfo *ldinfo; struct inode *lqinode; struct buffer_head *bh; int type; int status = 0; struct ocfs2_quota_recovery *rec; mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num); rec = ocfs2_alloc_quota_recovery(); if (!rec) return ERR_PTR(-ENOMEM); /* First init... */ for (type = 0; type < MAXQUOTAS; type++) { if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) continue; /* At this point, journal of the slot is already replayed so * we can trust metadata and data of the quota file */ lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num); if (!lqinode) { status = -ENOENT; goto out; } status = ocfs2_inode_lock_full(lqinode, NULL, 1, OCFS2_META_LOCK_RECOVERY); if (status < 0) { mlog_errno(status); goto out_put; } /* Now read local header */ bh = NULL; status = ocfs2_read_quota_block(lqinode, 0, &bh); if (status) { mlog_errno(status); mlog(ML_ERROR, "failed to read quota file info header " "(slot=%d type=%d)\n", slot_num, type); goto out_lock; } ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + OCFS2_LOCAL_INFO_OFF); status = ocfs2_recovery_load_quota(lqinode, ldinfo, type, &rec->r_list[type]); brelse(bh); out_lock: ocfs2_inode_unlock(lqinode, 1); out_put: iput(lqinode); if (status < 0) break; } out: if (status < 0) { ocfs2_free_quota_recovery(rec); rec = ERR_PTR(status); } return rec; } /* Sync changes in local quota file into global quota file and * reinitialize local quota file. * The function expects local quota file to be already locked and * dqonoff_mutex locked. */ static int ocfs2_recover_local_quota_file(struct inode *lqinode, int type, struct ocfs2_quota_recovery *rec) { struct super_block *sb = lqinode->i_sb; struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; struct ocfs2_local_disk_chunk *dchunk; struct ocfs2_local_disk_dqblk *dqblk; struct dquot *dquot; handle_t *handle; struct buffer_head *hbh = NULL, *qbh = NULL; int status = 0; int bit, chunk; struct ocfs2_recovery_chunk *rchunk, *next; qsize_t spacechange, inodechange; mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type); list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) { chunk = rchunk->rc_chunk; hbh = NULL; status = ocfs2_read_quota_block(lqinode, ol_quota_chunk_block(sb, chunk), &hbh); if (status) { mlog_errno(status); break; } dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data; for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) { qbh = NULL; status = ocfs2_read_quota_block(lqinode, ol_dqblk_block(sb, chunk, bit), &qbh); if (status) { mlog_errno(status); break; } dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data + ol_dqblk_block_off(sb, chunk, bit)); dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type); if (!dquot) { status = -EIO; mlog(ML_ERROR, "Failed to get quota structure " "for id %u, type %d. Cannot finish quota " "file recovery.\n", (unsigned)le64_to_cpu(dqblk->dqb_id), type); goto out_put_bh; } status = ocfs2_lock_global_qf(oinfo, 1); if (status < 0) { mlog_errno(status); goto out_put_dquot; } handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QSYNC_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); mlog_errno(status); goto out_drop_lock; } mutex_lock(&sb_dqopt(sb)->dqio_mutex); spin_lock(&dq_data_lock); /* Add usage from quota entry into quota changes * of our node. Auxiliary variables are important * due to signedness */ spacechange = le64_to_cpu(dqblk->dqb_spacemod); inodechange = le64_to_cpu(dqblk->dqb_inodemod); dquot->dq_dqb.dqb_curspace += spacechange; dquot->dq_dqb.dqb_curinodes += inodechange; spin_unlock(&dq_data_lock); /* We want to drop reference held by the crashed * node. Since we have our own reference we know * global structure actually won't be freed. */ status = ocfs2_global_release_dquot(dquot); if (status < 0) { mlog_errno(status); goto out_commit; } /* Release local quota file entry */ status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), qbh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto out_commit; } lock_buffer(qbh); WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap)); ocfs2_clear_bit(bit, dchunk->dqc_bitmap); le32_add_cpu(&dchunk->dqc_free, 1); unlock_buffer(qbh); status = ocfs2_journal_dirty(handle, qbh); if (status < 0) mlog_errno(status); out_commit: mutex_unlock(&sb_dqopt(sb)->dqio_mutex); ocfs2_commit_trans(OCFS2_SB(sb), handle); out_drop_lock: ocfs2_unlock_global_qf(oinfo, 1); out_put_dquot: dqput(dquot); out_put_bh: brelse(qbh); if (status < 0) break; } brelse(hbh); list_del(&rchunk->rc_list); kfree(rchunk->rc_bitmap); kfree(rchunk); if (status < 0) break; } if (status < 0) free_recovery_list(&(rec->r_list[type])); mlog_exit(status); return status; } /* Recover local quota files for given node different from us */ int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, struct ocfs2_quota_recovery *rec, int slot_num) { unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, LOCAL_GROUP_QUOTA_SYSTEM_INODE }; struct super_block *sb = osb->sb; struct ocfs2_local_disk_dqinfo *ldinfo; struct buffer_head *bh; handle_t *handle; int type; int status = 0; struct inode *lqinode; unsigned int flags; mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num); mutex_lock(&sb_dqopt(sb)->dqonoff_mutex); for (type = 0; type < MAXQUOTAS; type++) { if (list_empty(&(rec->r_list[type]))) continue; mlog(0, "Recovering quota in slot %d\n", slot_num); lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num); if (!lqinode) { status = -ENOENT; goto out; } status = ocfs2_inode_lock_full(lqinode, NULL, 1, OCFS2_META_LOCK_NOQUEUE); /* Someone else is holding the lock? Then he must be * doing the recovery. Just skip the file... */ if (status == -EAGAIN) { mlog(ML_NOTICE, "skipping quota recovery for slot %d " "because quota file is locked.\n", slot_num); status = 0; goto out_put; } else if (status < 0) { mlog_errno(status); goto out_put; } /* Now read local header */ bh = NULL; status = ocfs2_read_quota_block(lqinode, 0, &bh); if (status) { mlog_errno(status); mlog(ML_ERROR, "failed to read quota file info header " "(slot=%d type=%d)\n", slot_num, type); goto out_lock; } ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + OCFS2_LOCAL_INFO_OFF); /* Is recovery still needed? */ flags = le32_to_cpu(ldinfo->dqi_flags); if (!(flags & OLQF_CLEAN)) status = ocfs2_recover_local_quota_file(lqinode, type, rec); /* We don't want to mark file as clean when it is actually * active */ if (slot_num == osb->slot_num) goto out_bh; /* Mark quota file as clean if we are recovering quota file of * some other node. */ handle = ocfs2_start_trans(osb, OCFS2_LOCAL_QINFO_WRITE_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); mlog_errno(status); goto out_bh; } status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto out_trans; } lock_buffer(bh); ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN); unlock_buffer(bh); status = ocfs2_journal_dirty(handle, bh); if (status < 0) mlog_errno(status); out_trans: ocfs2_commit_trans(osb, handle); out_bh: brelse(bh); out_lock: ocfs2_inode_unlock(lqinode, 1); out_put: iput(lqinode); if (status < 0) break; } out: mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); kfree(rec); return status; } /* Read information header from quota file */ static int ocfs2_local_read_info(struct super_block *sb, int type) { struct ocfs2_local_disk_dqinfo *ldinfo; struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo; struct inode *lqinode = sb_dqopt(sb)->files[type]; int status; struct buffer_head *bh = NULL; struct ocfs2_quota_recovery *rec; int locked = 0; /* We don't need the lock and we have to acquire quota file locks * which will later depend on this lock */ mutex_unlock(&sb_dqopt(sb)->dqio_mutex); info->dqi_maxblimit = 0x7fffffffffffffffLL; info->dqi_maxilimit = 0x7fffffffffffffffLL; oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS); if (!oinfo) { mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota" " info."); goto out_err; } info->dqi_priv = oinfo; oinfo->dqi_type = type; INIT_LIST_HEAD(&oinfo->dqi_chunk); oinfo->dqi_rec = NULL; oinfo->dqi_lqi_bh = NULL; oinfo->dqi_ibh = NULL; status = ocfs2_global_read_info(sb, type); if (status < 0) goto out_err; status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1); if (status < 0) { mlog_errno(status); goto out_err; } locked = 1; /* Now read local header */ status = ocfs2_read_quota_block(lqinode, 0, &bh); if (status) { mlog_errno(status); mlog(ML_ERROR, "failed to read quota file info header " "(type=%d)\n", type); goto out_err; } ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + OCFS2_LOCAL_INFO_OFF); info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags); oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks); oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks); oinfo->dqi_ibh = bh; /* We crashed when using local quota file? */ if (!(info->dqi_flags & OLQF_CLEAN)) { rec = OCFS2_SB(sb)->quota_rec; if (!rec) { rec = ocfs2_alloc_quota_recovery(); if (!rec) { status = -ENOMEM; mlog_errno(status); goto out_err; } OCFS2_SB(sb)->quota_rec = rec; } status = ocfs2_recovery_load_quota(lqinode, ldinfo, type, &rec->r_list[type]); if (status < 0) { mlog_errno(status); goto out_err; } } status = ocfs2_load_local_quota_bitmaps(lqinode, ldinfo, &oinfo->dqi_chunk); if (status < 0) { mlog_errno(status); goto out_err; } /* Now mark quota file as used */ info->dqi_flags &= ~OLQF_CLEAN; status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info); if (status < 0) { mlog_errno(status); goto out_err; } mutex_lock(&sb_dqopt(sb)->dqio_mutex); return 0; out_err: if (oinfo) { iput(oinfo->dqi_gqinode); ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); ocfs2_lock_res_free(&oinfo->dqi_gqlock); brelse(oinfo->dqi_lqi_bh); if (locked) ocfs2_inode_unlock(lqinode, 1); ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); kfree(oinfo); } brelse(bh); mutex_lock(&sb_dqopt(sb)->dqio_mutex); return -1; } /* Write local info to quota file */ static int ocfs2_local_write_info(struct super_block *sb, int type) { struct mem_dqinfo *info = sb_dqinfo(sb, type); struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv) ->dqi_ibh; int status; status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info, info); if (status < 0) { mlog_errno(status); return -1; } return 0; } /* Release info from memory */ static int ocfs2_local_free_info(struct super_block *sb, int type) { struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; struct ocfs2_quota_chunk *chunk; struct ocfs2_local_disk_chunk *dchunk; int mark_clean = 1, len; int status; /* At this point we know there are no more dquots and thus * even if there's some sync in the pdflush queue, it won't * find any dquots and return without doing anything */ cancel_delayed_work_sync(&oinfo->dqi_sync_work); iput(oinfo->dqi_gqinode); ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); ocfs2_lock_res_free(&oinfo->dqi_gqlock); list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { dchunk = (struct ocfs2_local_disk_chunk *) (chunk->qc_headerbh->b_data); if (chunk->qc_num < oinfo->dqi_chunks - 1) { len = ol_chunk_entries(sb); } else { len = (oinfo->dqi_blocks - ol_quota_chunk_block(sb, chunk->qc_num) - 1) * ol_quota_entries_per_block(sb); } /* Not all entries free? Bug! */ if (le32_to_cpu(dchunk->dqc_free) != len) { mlog(ML_ERROR, "releasing quota file with used " "entries (type=%d)\n", type); mark_clean = 0; } } ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); /* dqonoff_mutex protects us against racing with recovery thread... */ if (oinfo->dqi_rec) { ocfs2_free_quota_recovery(oinfo->dqi_rec); mark_clean = 0; } if (!mark_clean) goto out; /* Mark local file as clean */ info->dqi_flags |= OLQF_CLEAN; status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], oinfo->dqi_ibh, olq_update_info, info); if (status < 0) { mlog_errno(status); goto out; } out: ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1); brelse(oinfo->dqi_ibh); brelse(oinfo->dqi_lqi_bh); kfree(oinfo); return 0; } static void olq_set_dquot(struct buffer_head *bh, void *private) { struct ocfs2_dquot *od = private; struct ocfs2_local_disk_dqblk *dqblk; struct super_block *sb = od->dq_dquot.dq_sb; dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data + ol_dqblk_block_offset(sb, od->dq_local_off)); dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id); spin_lock(&dq_data_lock); dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace - od->dq_origspace); dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes - od->dq_originodes); spin_unlock(&dq_data_lock); mlog(0, "Writing local dquot %u space %lld inodes %lld\n", od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod), (long long)le64_to_cpu(dqblk->dqb_inodemod)); } /* Write dquot to local quota file */ static int ocfs2_local_write_dquot(struct dquot *dquot) { struct super_block *sb = dquot->dq_sb; struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); struct buffer_head *bh = NULL; int status; status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type], ol_dqblk_file_block(sb, od->dq_local_off), &bh); if (status) { mlog_errno(status); goto out; } status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh, olq_set_dquot, od); if (status < 0) { mlog_errno(status); goto out; } out: brelse(bh); return status; } /* Find free entry in local quota file */ static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb, int type, int *offset) { struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; struct ocfs2_quota_chunk *chunk; struct ocfs2_local_disk_chunk *dchunk; int found = 0, len; list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { dchunk = (struct ocfs2_local_disk_chunk *) chunk->qc_headerbh->b_data; if (le32_to_cpu(dchunk->dqc_free) > 0) { found = 1; break; } } if (!found) return NULL; if (chunk->qc_num < oinfo->dqi_chunks - 1) { len = ol_chunk_entries(sb); } else { len = (oinfo->dqi_blocks - ol_quota_chunk_block(sb, chunk->qc_num) - 1) * ol_quota_entries_per_block(sb); } found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0); /* We failed? */ if (found == len) { mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u" " entries free (type=%d)\n", chunk->qc_num, le32_to_cpu(dchunk->dqc_free), type); return ERR_PTR(-EIO); } *offset = found; return chunk; } /* Add new chunk to the local quota file */ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk( struct super_block *sb, int type, int *offset) { struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; struct inode *lqinode = sb_dqopt(sb)->files[type]; struct ocfs2_quota_chunk *chunk = NULL; struct ocfs2_local_disk_chunk *dchunk; int status; handle_t *handle; struct buffer_head *bh = NULL, *dbh = NULL; u64 p_blkno; /* We are protected by dqio_sem so no locking needed */ status = ocfs2_extend_no_holes(lqinode, lqinode->i_size + 2 * sb->s_blocksize, lqinode->i_size); if (status < 0) { mlog_errno(status); goto out; } status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, lqinode->i_size + 2 * sb->s_blocksize); if (status < 0) { mlog_errno(status); goto out; } chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS); if (!chunk) { status = -ENOMEM; mlog_errno(status); goto out; } /* Local quota info and two new blocks we initialize */ handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_LOCAL_QINFO_WRITE_CREDITS + 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); mlog_errno(status); goto out; } /* Initialize chunk header */ down_read(&OCFS2_I(lqinode)->ip_alloc_sem); status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks, &p_blkno, NULL, NULL); up_read(&OCFS2_I(lqinode)->ip_alloc_sem); if (status < 0) { mlog_errno(status); goto out_trans; } bh = sb_getblk(sb, p_blkno); if (!bh) { status = -ENOMEM; mlog_errno(status); goto out_trans; } dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh); status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh, OCFS2_JOURNAL_ACCESS_CREATE); if (status < 0) { mlog_errno(status); goto out_trans; } lock_buffer(bh); dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb)); memset(dchunk->dqc_bitmap, 0, sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) - OCFS2_QBLK_RESERVED_SPACE); unlock_buffer(bh); status = ocfs2_journal_dirty(handle, bh); if (status < 0) { mlog_errno(status); goto out_trans; } /* Initialize new block with structures */ down_read(&OCFS2_I(lqinode)->ip_alloc_sem); status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1, &p_blkno, NULL, NULL); up_read(&OCFS2_I(lqinode)->ip_alloc_sem); if (status < 0) { mlog_errno(status); goto out_trans; } dbh = sb_getblk(sb, p_blkno); if (!dbh) { status = -ENOMEM; mlog_errno(status); goto out_trans; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh); status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh, OCFS2_JOURNAL_ACCESS_CREATE); if (status < 0) { mlog_errno(status); goto out_trans; } lock_buffer(dbh); memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE); unlock_buffer(dbh); status = ocfs2_journal_dirty(handle, dbh); if (status < 0) { mlog_errno(status); goto out_trans; } /* Update local quotafile info */ oinfo->dqi_blocks += 2; oinfo->dqi_chunks++; status = ocfs2_local_write_info(sb, type); if (status < 0) { mlog_errno(status); goto out_trans; } status = ocfs2_commit_trans(OCFS2_SB(sb), handle); if (status < 0) { mlog_errno(status); goto out; } list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk); chunk->qc_num = list_entry(chunk->qc_chunk.prev, struct ocfs2_quota_chunk, qc_chunk)->qc_num + 1; chunk->qc_headerbh = bh; *offset = 0; return chunk; out_trans: ocfs2_commit_trans(OCFS2_SB(sb), handle); out: brelse(bh); brelse(dbh); kmem_cache_free(ocfs2_qf_chunk_cachep, chunk); return ERR_PTR(status); } /* Find free entry in local quota file */ static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file( struct super_block *sb, int type, int *offset) { struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; struct ocfs2_quota_chunk *chunk; struct inode *lqinode = sb_dqopt(sb)->files[type]; struct ocfs2_local_disk_chunk *dchunk; int epb = ol_quota_entries_per_block(sb); unsigned int chunk_blocks; struct buffer_head *bh; u64 p_blkno; int status; handle_t *handle; if (list_empty(&oinfo->dqi_chunk)) return ocfs2_local_quota_add_chunk(sb, type, offset); /* Is the last chunk full? */ chunk = list_entry(oinfo->dqi_chunk.prev, struct ocfs2_quota_chunk, qc_chunk); chunk_blocks = oinfo->dqi_blocks - ol_quota_chunk_block(sb, chunk->qc_num) - 1; if (ol_chunk_blocks(sb) == chunk_blocks) return ocfs2_local_quota_add_chunk(sb, type, offset); /* We are protected by dqio_sem so no locking needed */ status = ocfs2_extend_no_holes(lqinode, lqinode->i_size + sb->s_blocksize, lqinode->i_size); if (status < 0) { mlog_errno(status); goto out; } status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, lqinode->i_size + sb->s_blocksize); if (status < 0) { mlog_errno(status); goto out; } /* Get buffer from the just added block */ down_read(&OCFS2_I(lqinode)->ip_alloc_sem); status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks, &p_blkno, NULL, NULL); up_read(&OCFS2_I(lqinode)->ip_alloc_sem); if (status < 0) { mlog_errno(status); goto out; } bh = sb_getblk(sb, p_blkno); if (!bh) { status = -ENOMEM; mlog_errno(status); goto out; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh); /* Local quota info, chunk header and the new block we initialize */ handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_LOCAL_QINFO_WRITE_CREDITS + 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); mlog_errno(status); goto out; } /* Zero created block */ status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh, OCFS2_JOURNAL_ACCESS_CREATE); if (status < 0) { mlog_errno(status); goto out_trans; } lock_buffer(bh); memset(bh->b_data, 0, sb->s_blocksize); unlock_buffer(bh); status = ocfs2_journal_dirty(handle, bh); if (status < 0) { mlog_errno(status); goto out_trans; } /* Update chunk header */ status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto out_trans; } dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data; lock_buffer(chunk->qc_headerbh); le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb)); unlock_buffer(chunk->qc_headerbh); status = ocfs2_journal_dirty(handle, chunk->qc_headerbh); if (status < 0) { mlog_errno(status); goto out_trans; } /* Update file header */ oinfo->dqi_blocks++; status = ocfs2_local_write_info(sb, type); if (status < 0) { mlog_errno(status); goto out_trans; } status = ocfs2_commit_trans(OCFS2_SB(sb), handle); if (status < 0) { mlog_errno(status); goto out; } *offset = chunk_blocks * epb; return chunk; out_trans: ocfs2_commit_trans(OCFS2_SB(sb), handle); out: return ERR_PTR(status); } static void olq_alloc_dquot(struct buffer_head *bh, void *private) { int *offset = private; struct ocfs2_local_disk_chunk *dchunk; dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; ocfs2_set_bit(*offset, dchunk->dqc_bitmap); le32_add_cpu(&dchunk->dqc_free, -1); } /* Create dquot in the local file for given id */ static int ocfs2_create_local_dquot(struct dquot *dquot) { struct super_block *sb = dquot->dq_sb; int type = dquot->dq_type; struct inode *lqinode = sb_dqopt(sb)->files[type]; struct ocfs2_quota_chunk *chunk; struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); int offset; int status; chunk = ocfs2_find_free_entry(sb, type, &offset); if (!chunk) { chunk = ocfs2_extend_local_quota_file(sb, type, &offset); if (IS_ERR(chunk)) return PTR_ERR(chunk); } else if (IS_ERR(chunk)) { return PTR_ERR(chunk); } od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset); od->dq_chunk = chunk; /* Initialize dquot structure on disk */ status = ocfs2_local_write_dquot(dquot); if (status < 0) { mlog_errno(status); goto out; } /* Mark structure as allocated */ status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot, &offset); if (status < 0) { mlog_errno(status); goto out; } out: return status; } /* Create entry in local file for dquot, load data from the global file */ static int ocfs2_local_read_dquot(struct dquot *dquot) { int status; mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type); status = ocfs2_global_read_dquot(dquot); if (status < 0) { mlog_errno(status); goto out_err; } /* Now create entry in the local quota file */ status = ocfs2_create_local_dquot(dquot); if (status < 0) { mlog_errno(status); goto out_err; } mlog_exit(0); return 0; out_err: mlog_exit(status); return status; } /* Release dquot structure from local quota file. ocfs2_release_dquot() has * already started a transaction and obtained exclusive lock for global * quota file. */ static int ocfs2_local_release_dquot(struct dquot *dquot) { int status; int type = dquot->dq_type; struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); struct super_block *sb = dquot->dq_sb; struct ocfs2_local_disk_chunk *dchunk; int offset; handle_t *handle = journal_current_handle(); BUG_ON(!handle); /* First write all local changes to global file */ status = ocfs2_global_release_dquot(dquot); if (status < 0) { mlog_errno(status); goto out; } status = ocfs2_journal_access_dq(handle, INODE_CACHE(sb_dqopt(sb)->files[type]), od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto out; } offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num, od->dq_local_off); dchunk = (struct ocfs2_local_disk_chunk *) (od->dq_chunk->qc_headerbh->b_data); /* Mark structure as freed */ lock_buffer(od->dq_chunk->qc_headerbh); ocfs2_clear_bit(offset, dchunk->dqc_bitmap); le32_add_cpu(&dchunk->dqc_free, 1); unlock_buffer(od->dq_chunk->qc_headerbh); status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh); if (status < 0) { mlog_errno(status); goto out; } status = 0; out: /* Clear the read bit so that next time someone uses this * dquot he reads fresh info from disk and allocates local * dquot structure */ clear_bit(DQ_READ_B, &dquot->dq_flags); return status; } static const struct quota_format_ops ocfs2_format_ops = { .check_quota_file = ocfs2_local_check_quota_file, .read_file_info = ocfs2_local_read_info, .write_file_info = ocfs2_global_write_info, .free_file_info = ocfs2_local_free_info, .read_dqblk = ocfs2_local_read_dquot, .commit_dqblk = ocfs2_local_write_dquot, .release_dqblk = ocfs2_local_release_dquot, }; struct quota_format_type ocfs2_quota_format = { .qf_fmt_id = QFMT_OCFS2, .qf_ops = &ocfs2_format_ops, .qf_owner = THIS_MODULE };