diff options
| -rw-r--r-- | fs/ext4/super.c | 4 | ||||
| -rw-r--r-- | fs/ocfs2/quota_global.c | 8 | ||||
| -rw-r--r-- | fs/ocfs2/quota_local.c | 8 | ||||
| -rw-r--r-- | fs/quota/dquot.c | 287 | ||||
| -rw-r--r-- | fs/quota/quota_tree.c | 8 | ||||
| -rw-r--r-- | include/linux/quota.h | 3 |
6 files changed, 186 insertions, 132 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 16a877a0f309..67ce21224dab 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5194,7 +5194,7 @@ static int ext4_statfs_project(struct super_block *sb, dquot = dqget(sb, qid); if (IS_ERR(dquot)) return PTR_ERR(dquot); - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); limit = (dquot->dq_dqb.dqb_bsoftlimit ? dquot->dq_dqb.dqb_bsoftlimit : @@ -5217,7 +5217,7 @@ static int ext4_statfs_project(struct super_block *sb, (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; } - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); dqput(dquot); return 0; } diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c index 78f3a869748c..c94b6baaa551 100644 --- a/fs/ocfs2/quota_global.c +++ b/fs/ocfs2/quota_global.c @@ -504,7 +504,7 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) /* Update space and inode usage. Get also other information from * global quota file so that we don't overwrite any changes there. * We are */ - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); spacechange = dquot->dq_dqb.dqb_curspace - OCFS2_DQUOT(dquot)->dq_origspace; inodechange = dquot->dq_dqb.dqb_curinodes - @@ -560,7 +560,7 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); err = ocfs2_qinfo_lock(info, freeing); if (err < 0) { mlog(ML_ERROR, "Failed to lock quota info, losing quota write" @@ -924,10 +924,10 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot) /* In case user set some limits, sync dquot immediately to global * quota file so that information propagates quicker */ - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); if (dquot->dq_flags & mask) sync = 1; - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); /* This is a slight hack but we can't afford getting global quota * lock if we already have a transaction started. */ if (!sync || journal_current_handle()) { diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c index 2eeedcc2e9da..aa700fd10610 100644 --- a/fs/ocfs2/quota_local.c +++ b/fs/ocfs2/quota_local.c @@ -521,7 +521,7 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode, goto out_drop_lock; } down_write(&sb_dqopt(sb)->dqio_sem); - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); /* Add usage from quota entry into quota changes * of our node. Auxiliary variables are important * due to signedness */ @@ -529,7 +529,7 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode, inodechange = le64_to_cpu(dqblk->dqb_inodemod); dquot->dq_dqb.dqb_curspace += spacechange; dquot->dq_dqb.dqb_curinodes += inodechange; - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_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. */ @@ -877,12 +877,12 @@ static void olq_set_dquot(struct buffer_head *bh, void *private) dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns, od->dq_dquot.dq_id)); - spin_lock(&dq_data_lock); + spin_lock(&od->dq_dquot.dq_dqb_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); + spin_unlock(&od->dq_dquot.dq_dqb_lock); trace_olq_set_dquot( (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod), (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod), diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 411142a2f074..d51797f850c5 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -82,16 +82,19 @@ #include <linux/uaccess.h> /* - * There are three quota SMP locks. dq_list_lock protects all lists with quotas - * and quota formats. - * dq_data_lock protects data from dq_dqb and also mem_dqinfo structures and - * also guards consistency of dquot->dq_dqb with inode->i_blocks, i_bytes. - * i_blocks and i_bytes updates itself are guarded by i_lock acquired directly - * in inode_add_bytes() and inode_sub_bytes(). dq_state_lock protects - * modifications of quota state (on quotaon and quotaoff) and readers who care - * about latest values take it as well. + * There are five quota SMP locks: + * * dq_list_lock protects all lists with quotas and quota formats. + * * dquot->dq_dqb_lock protects data from dq_dqb + * * inode->i_lock protects inode->i_blocks, i_bytes and also guards + * consistency of dquot->dq_dqb with inode->i_blocks, i_bytes so that + * dquot_transfer() can stabilize amount it transfers + * * dq_data_lock protects mem_dqinfo structures and modifications of dquot + * pointers in the inode + * * dq_state_lock protects modifications of quota state (on quotaon and + * quotaoff) and readers who care about latest values take it as well. * - * The spinlock ordering is hence: dq_data_lock > dq_list_lock > i_lock, + * The spinlock ordering is hence: + * dq_data_lock > dq_list_lock > i_lock > dquot->dq_dqb_lock, * dq_list_lock > dq_state_lock * * Note that some things (eg. sb pointer, type, id) doesn't change during @@ -246,6 +249,7 @@ struct dqstats dqstats; EXPORT_SYMBOL(dqstats); static qsize_t inode_get_rsv_space(struct inode *inode); +static qsize_t __inode_get_rsv_space(struct inode *inode); static int __dquot_initialize(struct inode *inode, int type); static inline unsigned int @@ -816,6 +820,7 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type) dquot->dq_sb = sb; dquot->dq_id = make_kqid_invalid(type); atomic_set(&dquot->dq_count, 1); + spin_lock_init(&dquot->dq_dqb_lock); return dquot; } @@ -1073,21 +1078,6 @@ static void drop_dquot_ref(struct super_block *sb, int type) } } -static inline void dquot_incr_inodes(struct dquot *dquot, qsize_t number) -{ - dquot->dq_dqb.dqb_curinodes += number; -} - -static inline void dquot_incr_space(struct dquot *dquot, qsize_t number) -{ - dquot->dq_dqb.dqb_curspace += number; -} - -static inline void dquot_resv_space(struct dquot *dquot, qsize_t number) -{ - dquot->dq_dqb.dqb_rsvspace += number; -} - static inline void dquot_free_reserved_space(struct dquot *dquot, qsize_t number) { @@ -1246,21 +1236,24 @@ static int ignore_hardlimit(struct dquot *dquot) !(info->dqi_flags & DQF_ROOT_SQUASH)); } -/* needs dq_data_lock */ -static int check_idq(struct dquot *dquot, qsize_t inodes, - struct dquot_warn *warn) +static int dquot_add_inodes(struct dquot *dquot, qsize_t inodes, + struct dquot_warn *warn) { - qsize_t newinodes = dquot->dq_dqb.dqb_curinodes + inodes; + qsize_t newinodes; + int ret = 0; + spin_lock(&dquot->dq_dqb_lock); + newinodes = dquot->dq_dqb.dqb_curinodes + inodes; if (!sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_id.type) || test_bit(DQ_FAKE_B, &dquot->dq_flags)) - return 0; + goto add; if (dquot->dq_dqb.dqb_ihardlimit && newinodes > dquot->dq_dqb.dqb_ihardlimit && !ignore_hardlimit(dquot)) { prepare_warning(warn, dquot, QUOTA_NL_IHARDWARN); - return -EDQUOT; + ret = -EDQUOT; + goto out; } if (dquot->dq_dqb.dqb_isoftlimit && @@ -1269,7 +1262,8 @@ static int check_idq(struct dquot *dquot, qsize_t inodes, ktime_get_real_seconds() >= dquot->dq_dqb.dqb_itime && !ignore_hardlimit(dquot)) { prepare_warning(warn, dquot, QUOTA_NL_ISOFTLONGWARN); - return -EDQUOT; + ret = -EDQUOT; + goto out; } if (dquot->dq_dqb.dqb_isoftlimit && @@ -1279,30 +1273,40 @@ static int check_idq(struct dquot *dquot, qsize_t inodes, dquot->dq_dqb.dqb_itime = ktime_get_real_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type].dqi_igrace; } +add: + dquot->dq_dqb.dqb_curinodes = newinodes; - return 0; +out: + spin_unlock(&dquot->dq_dqb_lock); + return ret; } -/* needs dq_data_lock */ -static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc, - struct dquot_warn *warn) +static int dquot_add_space(struct dquot *dquot, qsize_t space, + qsize_t rsv_space, unsigned int flags, + struct dquot_warn *warn) { qsize_t tspace; struct super_block *sb = dquot->dq_sb; + int ret = 0; + spin_lock(&dquot->dq_dqb_lock); if (!sb_has_quota_limits_enabled(sb, dquot->dq_id.type) || test_bit(DQ_FAKE_B, &dquot->dq_flags)) - return 0; + goto add; tspace = dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace - + space; + + space + rsv_space; + + if (flags & DQUOT_SPACE_NOFAIL) + goto add; if (dquot->dq_dqb.dqb_bhardlimit && tspace > dquot->dq_dqb.dqb_bhardlimit && !ignore_hardlimit(dquot)) { - if (!prealloc) + if (flags & DQUOT_SPACE_WARN) prepare_warning(warn, dquot, QUOTA_NL_BHARDWARN); - return -EDQUOT; + ret = -EDQUOT; + goto out; } if (dquot->dq_dqb.dqb_bsoftlimit && @@ -1310,28 +1314,34 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc, dquot->dq_dqb.dqb_btime && ktime_get_real_seconds() >= dquot->dq_dqb.dqb_btime && !ignore_hardlimit(dquot)) { - if (!prealloc) + if (flags & DQUOT_SPACE_WARN) prepare_warning(warn, dquot, QUOTA_NL_BSOFTLONGWARN); - return -EDQUOT; + ret = -EDQUOT; + goto out; } if (dquot->dq_dqb.dqb_bsoftlimit && tspace > dquot->dq_dqb.dqb_bsoftlimit && dquot->dq_dqb.dqb_btime == 0) { - if (!prealloc) { + if (flags & DQUOT_SPACE_WARN) { prepare_warning(warn, dquot, QUOTA_NL_BSOFTWARN); dquot->dq_dqb.dqb_btime = ktime_get_real_seconds() + sb_dqopt(sb)->info[dquot->dq_id.type].dqi_bgrace; - } - else + } else { /* * We don't allow preallocation to exceed softlimit so exceeding will * be always printed */ - return -EDQUOT; + ret = -EDQUOT; + goto out; + } } - - return 0; +add: + dquot->dq_dqb.dqb_rsvspace += rsv_space; + dquot->dq_dqb.dqb_curspace += space; +out: + spin_unlock(&dquot->dq_dqb_lock); + return ret; } static int info_idq_free(struct dquot *dquot, qsize_t inodes) @@ -1466,8 +1476,15 @@ static int __dquot_initialize(struct inode *inode, int type) * did a write before quota was turned on */ rsv = inode_get_rsv_space(inode); - if (unlikely(rsv)) - dquot_resv_space(dquots[cnt], rsv); + if (unlikely(rsv)) { + spin_lock(&inode->i_lock); + /* Get reservation again under proper lock */ + rsv = __inode_get_rsv_space(inode); + spin_lock(&dquots[cnt]->dq_dqb_lock); + dquots[cnt]->dq_dqb.dqb_rsvspace += rsv; + spin_unlock(&dquots[cnt]->dq_dqb_lock); + spin_unlock(&inode->i_lock); + } } } out_lock: @@ -1562,6 +1579,13 @@ static qsize_t *inode_reserved_space(struct inode * inode) return inode->i_sb->dq_op->get_reserved_space(inode); } +static qsize_t __inode_get_rsv_space(struct inode *inode) +{ + if (!inode->i_sb->dq_op->get_reserved_space) + return 0; + return *inode_reserved_space(inode); +} + static qsize_t inode_get_rsv_space(struct inode *inode) { qsize_t ret; @@ -1569,7 +1593,7 @@ static qsize_t inode_get_rsv_space(struct inode *inode) if (!inode->i_sb->dq_op->get_reserved_space) return 0; spin_lock(&inode->i_lock); - ret = *inode_reserved_space(inode); + ret = __inode_get_rsv_space(inode); spin_unlock(&inode->i_lock); return ret; } @@ -1610,33 +1634,41 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (!dquots[cnt]) continue; - ret = check_bdq(dquots[cnt], number, - !(flags & DQUOT_SPACE_WARN), &warn[cnt]); - if (ret && !(flags & DQUOT_SPACE_NOFAIL)) { - spin_unlock(&dq_data_lock); + if (flags & DQUOT_SPACE_RESERVE) { + ret = dquot_add_space(dquots[cnt], 0, number, flags, + &warn[cnt]); + } else { + ret = dquot_add_space(dquots[cnt], number, 0, flags, + &warn[cnt]); + } + if (ret) { + /* Back out changes we already did */ + for (cnt--; cnt >= 0; cnt--) { + if (!dquots[cnt]) + continue; + spin_lock(&dquots[cnt]->dq_dqb_lock); + if (flags & DQUOT_SPACE_RESERVE) { + dquots[cnt]->dq_dqb.dqb_rsvspace -= + number; + } else { + dquots[cnt]->dq_dqb.dqb_curspace -= + number; + } + spin_unlock(&dquots[cnt]->dq_dqb_lock); + } + spin_unlock(&inode->i_lock); goto out_flush_warn; } } - for (cnt = 0; cnt < MAXQUOTAS; cnt++) { - if (!dquots[cnt]) - continue; - if (reserve) - dquot_resv_space(dquots[cnt], number); - else - dquot_incr_space(dquots[cnt], number); - } - if (reserve) { - spin_lock(&inode->i_lock); + if (reserve) *inode_reserved_space(inode) += number; - spin_unlock(&inode->i_lock); - } else { - inode_add_bytes(inode, number); - } - spin_unlock(&dq_data_lock); + else + __inode_add_bytes(inode, number); + spin_unlock(&inode->i_lock); if (reserve) goto out_flush_warn; @@ -1665,23 +1697,26 @@ int dquot_alloc_inode(struct inode *inode) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (!dquots[cnt]) continue; - ret = check_idq(dquots[cnt], 1, &warn[cnt]); - if (ret) + ret = dquot_add_inodes(dquots[cnt], 1, &warn[cnt]); + if (ret) { + for (cnt--; cnt >= 0; cnt--) { + if (!dquots[cnt]) + continue; + /* Back out changes we already did */ + spin_lock(&dquots[cnt]->dq_dqb_lock); + dquots[cnt]->dq_dqb.dqb_curinodes--; + spin_unlock(&dquots[cnt]->dq_dqb_lock); + } goto warn_put_all; - } - - for (cnt = 0; cnt < MAXQUOTAS; cnt++) { - if (!dquots[cnt]) - continue; - dquot_incr_inodes(dquots[cnt], 1); + } } warn_put_all: - spin_unlock(&dq_data_lock); + spin_unlock(&inode->i_lock); if (ret == 0) mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); @@ -1708,24 +1743,24 @@ int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); /* Claim reserved quotas to allocated quotas */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (dquots[cnt]) { struct dquot *dquot = dquots[cnt]; + spin_lock(&dquot->dq_dqb_lock); if (WARN_ON_ONCE(dquot->dq_dqb.dqb_rsvspace < number)) number = dquot->dq_dqb.dqb_rsvspace; dquot->dq_dqb.dqb_curspace += number; dquot->dq_dqb.dqb_rsvspace -= number; + spin_unlock(&dquot->dq_dqb_lock); } } /* Update inode bytes */ - spin_lock(&inode->i_lock); *inode_reserved_space(inode) -= number; __inode_add_bytes(inode, number); spin_unlock(&inode->i_lock); - spin_unlock(&dq_data_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); return 0; @@ -1750,24 +1785,24 @@ void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); /* Claim reserved quotas to allocated quotas */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (dquots[cnt]) { struct dquot *dquot = dquots[cnt]; + spin_lock(&dquot->dq_dqb_lock); if (WARN_ON_ONCE(dquot->dq_dqb.dqb_curspace < number)) number = dquot->dq_dqb.dqb_curspace; dquot->dq_dqb.dqb_rsvspace += number; dquot->dq_dqb.dqb_curspace -= number; + spin_unlock(&dquot->dq_dqb_lock); } } /* Update inode bytes */ - spin_lock(&inode->i_lock); *inode_reserved_space(inode) += number; __inode_sub_bytes(inode, number); spin_unlock(&inode->i_lock); - spin_unlock(&dq_data_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); return; @@ -1797,13 +1832,14 @@ void __dquot_free_space(struct inode *inode, qsize_t number, int flags) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { int wtype; warn[cnt].w_type = QUOTA_NL_NOWARN; if (!dquots[cnt]) continue; + spin_lock(&dquots[cnt]->dq_dqb_lock); wtype = info_bdq_free(dquots[cnt], number); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn[cnt], dquots[cnt], wtype); @@ -1811,15 +1847,13 @@ void __dquot_free_space(struct inode *inode, qsize_t number, int flags) dquot_free_reserved_space(dquots[cnt], number); else dquot_decr_space(dquots[cnt], number); + spin_unlock(&dquots[cnt]->dq_dqb_lock); } - if (reserve) { - spin_lock(&inode->i_lock); + if (reserve) *inode_reserved_space(inode) -= number; - spin_unlock(&inode->i_lock); - } else { - inode_sub_bytes(inode, number); - } - spin_unlock(&dq_data_lock); + else + __inode_sub_bytes(inode, number); + spin_unlock(&inode->i_lock); if (reserve) goto out_unlock; @@ -1845,19 +1879,21 @@ void dquot_free_inode(struct inode *inode) dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); - spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { int wtype; warn[cnt].w_type = QUOTA_NL_NOWARN; if (!dquots[cnt]) continue; + spin_lock(&dquots[cnt]->dq_dqb_lock); wtype = info_idq_free(dquots[cnt], 1); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn[cnt], dquots[cnt], wtype); dquot_decr_inodes(dquots[cnt], 1); + spin_unlock(&dquots[cnt]->dq_dqb_lock); } - spin_unlock(&dq_data_lock); + spin_unlock(&inode->i_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn); @@ -1878,7 +1914,7 @@ EXPORT_SYMBOL(dquot_free_inode); */ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) { - qsize_t space, cur_space; + qsize_t cur_space; qsize_t rsv_space = 0; qsize_t inode_usage = 1; struct dquot *transfer_from[MAXQUOTAS] = {}; @@ -1905,14 +1941,18 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) } spin_lock(&dq_data_lock); + spin_lock(&inode->i_lock); if (IS_NOQUOTA(inode)) { /* File without quota accounting? */ + spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); return 0; } - cur_space = inode_get_bytes(inode); - rsv_space = inode_get_rsv_space(inode); - space = cur_space + rsv_space; - /* Build the transfer_from list and check the limits */ + cur_space = __inode_get_bytes(inode); + rsv_space = __inode_get_rsv_space(inode); + /* + * Build the transfer_from list, check limits, and update usage in + * the target structures. + */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { /* * Skip changes for same uid or gid or for turned off quota-type. @@ -1924,28 +1964,33 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) continue; is_valid[cnt] = 1; transfer_from[cnt] = i_dquot(inode)[cnt]; - ret = check_idq(transfer_to[cnt], inode_usage, &warn_to[cnt]); + ret = dquot_add_inodes(transfer_to[cnt], inode_usage, + &warn_to[cnt]); if (ret) goto over_quota; - ret = check_bdq(transfer_to[cnt], space, 0, &warn_to[cnt]); - if (ret) + ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space, 0, + &warn_to[cnt]); + if (ret) { + dquot_decr_inodes(transfer_to[cnt], inode_usage); goto over_quota; + } } - /* - * Finally perform the needed transfer from transfer_from to transfer_to - */ + /* Decrease usage for source structures and update quota pointers */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (!is_valid[cnt]) continue; /* Due to IO error we might not have transfer_from[] structure */ if (transfer_from[cnt]) { int wtype; + + spin_lock(&transfer_from[cnt]->dq_dqb_lock); wtype = info_idq_free(transfer_from[cnt], inode_usage); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_inodes[cnt], transfer_from[cnt], wtype); - wtype = info_bdq_free(transfer_from[cnt], space); + wtype = info_bdq_free(transfer_from[cnt], + cur_space + rsv_space); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_space[cnt], transfer_from[cnt], wtype); @@ -1953,14 +1998,11 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) dquot_decr_space(transfer_from[cnt], cur_space); dquot_free_reserved_space(transfer_from[cnt], rsv_space); + spin_unlock(&transfer_from[cnt]->dq_dqb_lock); } - - dquot_incr_inodes(transfer_to[cnt], inode_usage); - dquot_incr_space(transfer_to[cnt], cur_space); - dquot_resv_space(transfer_to[cnt], rsv_space); - i_dquot(inode)[cnt] = transfer_to[cnt]; } + spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); mark_all_dquot_dirty(transfer_from); @@ -1974,6 +2016,17 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) transfer_to[cnt] = transfer_from[cnt]; return 0; over_quota: + /* Back out changes we already did */ + for (cnt--; cnt >= 0; cnt--) { + if (!is_valid[cnt]) + continue; + spin_lock(&transfer_to[cnt]->dq_dqb_lock); + dquot_decr_inodes(transfer_to[cnt], inode_usage); + dquot_decr_space(transfer_to[cnt], cur_space); + dquot_free_reserved_space(transfer_to[cnt], rsv_space); + spin_unlock(&transfer_to[cnt]->dq_dqb_lock); + } + spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); flush_warnings(warn_to); return ret; @@ -2524,7 +2577,7 @@ static void do_get_dqblk(struct dquot *dquot, struct qc_dqblk *di) struct mem_dqblk *dm = &dquot->dq_dqb; memset(di, 0, sizeof(*di)); - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); di->d_spc_hardlimit = dm->dqb_bhardlimit; di->d_spc_softlimit = dm->dqb_bsoftlimit; di->d_ino_hardlimit = dm->dqb_ihardlimit; @@ -2533,7 +2586,7 @@ static void do_get_dqblk(struct dquot *dquot, struct qc_dqblk *di) di->d_ino_count = dm->dqb_curinodes; di->d_spc_timer = dm->dqb_btime; di->d_ino_timer = dm->dqb_itime; - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); } int dquot_get_dqblk(struct super_block *sb, struct kqid qid, @@ -2597,7 +2650,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di) (di->d_ino_hardlimit > dqi->dqi_max_ino_limit))) return -ERANGE; - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); if (di->d_fieldmask & QC_SPACE) { dm->dqb_curspace = di->d_space - dm->dqb_rsvspace; check_blim = 1; @@ -2663,7 +2716,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di) clear_bit(DQ_FAKE_B, &dquot->dq_flags); else set_bit(DQ_FAKE_B, &dquot->dq_flags); - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); mark_dquot_dirty(dquot); return 0; diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c index 54f85eb2609c..bb3f59bcfcf5 100644 --- a/fs/quota/quota_tree.c +++ b/fs/quota/quota_tree.c @@ -389,9 +389,9 @@ int qtree_write_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot) return ret; } } - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); info->dqi_ops->mem2disk_dqblk(ddquot, dquot); - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); ret = sb->s_op->quota_write(sb, type, ddquot, info->dqi_entry_size, dquot->dq_off); if (ret != info->dqi_entry_size) { @@ -649,14 +649,14 @@ int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot) kfree(ddquot); goto out; } - spin_lock(&dq_data_lock); + spin_lock(&dquot->dq_dqb_lock); info->dqi_ops->disk2mem_dqblk(dquot, ddquot); if (!dquot->dq_dqb.dqb_bhardlimit && !dquot->dq_dqb.dqb_bsoftlimit && !dquot->dq_dqb.dqb_ihardlimit && !dquot->dq_dqb.dqb_isoftlimit) set_bit(DQ_FAKE_B, &dquot->dq_flags); - spin_unlock(&dq_data_lock); + spin_unlock(&dquot->dq_dqb_lock); kfree(ddquot); out: dqstats_inc(DQST_READS); diff --git a/include/linux/quota.h b/include/linux/quota.h index eccc1cb6274e..074123975595 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -298,12 +298,13 @@ struct dquot { struct list_head dq_free; /* Free list element */ struct list_head dq_dirty; /* List of dirty dquots */ struct mutex dq_lock; /* dquot IO lock */ + spinlock_t dq_dqb_lock; /* Lock protecting dq_dqb changes */ atomic_t dq_count; /* Use count */ struct super_block *dq_sb; /* superblock this applies to */ struct kqid dq_id; /* ID this applies to (uid, gid, projid) */ loff_t dq_off; /* Offset of dquot on disk */ unsigned long dq_flags; /* See DQ_* */ - struct mem_dqblk dq_dqb; /* Diskquota usage */ + struct mem_dqblk dq_dqb; /* Diskquota usage [dq_dqb_lock] */ }; /* Operations which must be implemented by each quota format */ |