diff options
Diffstat (limited to 'fs/quota')
| -rw-r--r-- | fs/quota/dquot.c | 190 | ||||
| -rw-r--r-- | fs/quota/quota.c | 4 |
2 files changed, 81 insertions, 113 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 1ad8bf076cf..12c233da1b6 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -228,10 +228,6 @@ static struct hlist_head *dquot_hash; struct dqstats dqstats; EXPORT_SYMBOL(dqstats); -#ifdef CONFIG_SMP -struct dqstats *dqstats_pcpu; -EXPORT_SYMBOL(dqstats_pcpu); -#endif static qsize_t inode_get_rsv_space(struct inode *inode); static void __dquot_initialize(struct inode *inode, int type); @@ -584,7 +580,7 @@ out: } EXPORT_SYMBOL(dquot_scan_active); -int vfs_quota_sync(struct super_block *sb, int type, int wait) +int dquot_quota_sync(struct super_block *sb, int type, int wait) { struct list_head *dirty; struct dquot *dquot; @@ -656,7 +652,7 @@ int vfs_quota_sync(struct super_block *sb, int type, int wait) return 0; } -EXPORT_SYMBOL(vfs_quota_sync); +EXPORT_SYMBOL(dquot_quota_sync); /* Free unused dquots from cache */ static void prune_dqcache(int count) @@ -676,27 +672,10 @@ static void prune_dqcache(int count) } } -static int dqstats_read(unsigned int type) -{ - int count = 0; -#ifdef CONFIG_SMP - int cpu; - for_each_possible_cpu(cpu) - count += per_cpu_ptr(dqstats_pcpu, cpu)->stat[type]; - /* Statistics reading is racy, but absolute accuracy isn't required */ - if (count < 0) - count = 0; -#else - count = dqstats.stat[type]; -#endif - return count; -} - /* * This is called from kswapd when we think we need some * more memory */ - static int shrink_dqcache_memory(int nr, gfp_t gfp_mask) { if (nr) { @@ -704,7 +683,9 @@ static int shrink_dqcache_memory(int nr, gfp_t gfp_mask) prune_dqcache(nr); spin_unlock(&dq_list_lock); } - return (dqstats_read(DQST_FREE_DQUOTS)/100) * sysctl_vfs_cache_pressure; + return ((unsigned) + percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS]) + /100) * sysctl_vfs_cache_pressure; } static struct shrinker dqcache_shrinker = { @@ -1815,7 +1796,7 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr) if (iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) transfer_to[USRQUOTA] = dqget(sb, iattr->ia_uid, USRQUOTA); if (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid) - transfer_to[GRPQUOTA] = dqget(sb, iattr->ia_uid, GRPQUOTA); + transfer_to[GRPQUOTA] = dqget(sb, iattr->ia_gid, GRPQUOTA); ret = __dquot_transfer(inode, transfer_to); dqput_all(transfer_to); @@ -1850,6 +1831,7 @@ const struct dquot_operations dquot_operations = { .alloc_dquot = dquot_alloc, .destroy_dquot = dquot_destroy, }; +EXPORT_SYMBOL(dquot_operations); /* * Generic helper for ->open on filesystems supporting disk quotas. @@ -1868,7 +1850,7 @@ EXPORT_SYMBOL(dquot_file_open); /* * Turn quota off on a device. type == -1 ==> quotaoff for all types (umount) */ -int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags) +int dquot_disable(struct super_block *sb, int type, unsigned int flags) { int cnt, ret = 0; struct quota_info *dqopt = sb_dqopt(sb); @@ -1998,14 +1980,15 @@ put_inodes: } return ret; } -EXPORT_SYMBOL(vfs_quota_disable); +EXPORT_SYMBOL(dquot_disable); -int vfs_quota_off(struct super_block *sb, int type, int remount) +int dquot_quota_off(struct super_block *sb, int type) { - return vfs_quota_disable(sb, type, remount ? DQUOT_SUSPENDED : - (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED)); + return dquot_disable(sb, type, + DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); } -EXPORT_SYMBOL(vfs_quota_off); +EXPORT_SYMBOL(dquot_quota_off); + /* * Turn quotas on on a device */ @@ -2123,36 +2106,43 @@ out_fmt: } /* Reenable quotas on remount RW */ -static int vfs_quota_on_remount(struct super_block *sb, int type) +int dquot_resume(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); struct inode *inode; - int ret; + int ret = 0, cnt; unsigned int flags; - mutex_lock(&dqopt->dqonoff_mutex); - if (!sb_has_quota_suspended(sb, type)) { + for (cnt = 0; cnt < MAXQUOTAS; cnt++) { + if (type != -1 && cnt != type) + continue; + + mutex_lock(&dqopt->dqonoff_mutex); + if (!sb_has_quota_suspended(sb, cnt)) { + mutex_unlock(&dqopt->dqonoff_mutex); + continue; + } + inode = dqopt->files[cnt]; + dqopt->files[cnt] = NULL; + spin_lock(&dq_state_lock); + flags = dqopt->flags & dquot_state_flag(DQUOT_USAGE_ENABLED | + DQUOT_LIMITS_ENABLED, + cnt); + dqopt->flags &= ~dquot_state_flag(DQUOT_STATE_FLAGS, cnt); + spin_unlock(&dq_state_lock); mutex_unlock(&dqopt->dqonoff_mutex); - return 0; - } - inode = dqopt->files[type]; - dqopt->files[type] = NULL; - spin_lock(&dq_state_lock); - flags = dqopt->flags & dquot_state_flag(DQUOT_USAGE_ENABLED | - DQUOT_LIMITS_ENABLED, type); - dqopt->flags &= ~dquot_state_flag(DQUOT_STATE_FLAGS, type); - spin_unlock(&dq_state_lock); - mutex_unlock(&dqopt->dqonoff_mutex); - flags = dquot_generic_flag(flags, type); - ret = vfs_load_quota_inode(inode, type, dqopt->info[type].dqi_fmt_id, - flags); - iput(inode); + flags = dquot_generic_flag(flags, cnt); + ret = vfs_load_quota_inode(inode, cnt, + dqopt->info[cnt].dqi_fmt_id, flags); + iput(inode); + } return ret; } +EXPORT_SYMBOL(dquot_resume); -int vfs_quota_on_path(struct super_block *sb, int type, int format_id, +int dquot_quota_on_path(struct super_block *sb, int type, int format_id, struct path *path) { int error = security_quota_on(path->dentry); @@ -2167,40 +2157,36 @@ int vfs_quota_on_path(struct super_block *sb, int type, int format_id, DQUOT_LIMITS_ENABLED); return error; } -EXPORT_SYMBOL(vfs_quota_on_path); +EXPORT_SYMBOL(dquot_quota_on_path); -int vfs_quota_on(struct super_block *sb, int type, int format_id, char *name, - int remount) +int dquot_quota_on(struct super_block *sb, int type, int format_id, char *name) { struct path path; int error; - if (remount) - return vfs_quota_on_remount(sb, type); - error = kern_path(name, LOOKUP_FOLLOW, &path); if (!error) { - error = vfs_quota_on_path(sb, type, format_id, &path); + error = dquot_quota_on_path(sb, type, format_id, &path); path_put(&path); } return error; } -EXPORT_SYMBOL(vfs_quota_on); +EXPORT_SYMBOL(dquot_quota_on); /* * More powerful function for turning on quotas allowing setting * of individual quota flags */ -int vfs_quota_enable(struct inode *inode, int type, int format_id, - unsigned int flags) +int dquot_enable(struct inode *inode, int type, int format_id, + unsigned int flags) { int ret = 0; struct super_block *sb = inode->i_sb; struct quota_info *dqopt = sb_dqopt(sb); /* Just unsuspend quotas? */ - if (flags & DQUOT_SUSPENDED) - return vfs_quota_on_remount(sb, type); + BUG_ON(flags & DQUOT_SUSPENDED); + if (!flags) return 0; /* Just updating flags needed? */ @@ -2232,13 +2218,13 @@ out_lock: load_quota: return vfs_load_quota_inode(inode, type, format_id, flags); } -EXPORT_SYMBOL(vfs_quota_enable); +EXPORT_SYMBOL(dquot_enable); /* * This function is used when filesystem needs to initialize quotas * during mount time. */ -int vfs_quota_on_mount(struct super_block *sb, char *qf_name, +int dquot_quota_on_mount(struct super_block *sb, char *qf_name, int format_id, int type) { struct dentry *dentry; @@ -2264,24 +2250,7 @@ out: dput(dentry); return error; } -EXPORT_SYMBOL(vfs_quota_on_mount); - -/* Wrapper to turn on quotas when remounting rw */ -int vfs_dq_quota_on_remount(struct super_block *sb) -{ - int cnt; - int ret = 0, err; - - if (!sb->s_qcop || !sb->s_qcop->quota_on) - return -ENOSYS; - for (cnt = 0; cnt < MAXQUOTAS; cnt++) { - err = sb->s_qcop->quota_on(sb, cnt, 0, NULL, 1); - if (err < 0 && !ret) - ret = err; - } - return ret; -} -EXPORT_SYMBOL(vfs_dq_quota_on_remount); +EXPORT_SYMBOL(dquot_quota_on_mount); static inline qsize_t qbtos(qsize_t blocks) { @@ -2316,8 +2285,8 @@ static void do_get_dqblk(struct dquot *dquot, struct fs_disk_quota *di) spin_unlock(&dq_data_lock); } -int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, - struct fs_disk_quota *di) +int dquot_get_dqblk(struct super_block *sb, int type, qid_t id, + struct fs_disk_quota *di) { struct dquot *dquot; @@ -2329,7 +2298,7 @@ int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, return 0; } -EXPORT_SYMBOL(vfs_get_dqblk); +EXPORT_SYMBOL(dquot_get_dqblk); #define VFS_FS_DQ_MASK \ (FS_DQ_BCOUNT | FS_DQ_BSOFT | FS_DQ_BHARD | \ @@ -2428,7 +2397,7 @@ static int do_set_dqblk(struct dquot *dquot, struct fs_disk_quota *di) return 0; } -int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, +int dquot_set_dqblk(struct super_block *sb, int type, qid_t id, struct fs_disk_quota *di) { struct dquot *dquot; @@ -2444,10 +2413,10 @@ int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, out: return rc; } -EXPORT_SYMBOL(vfs_set_dqblk); +EXPORT_SYMBOL(dquot_set_dqblk); /* Generic routine for getting common part of quota file information */ -int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii) +int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii) { struct mem_dqinfo *mi; @@ -2466,10 +2435,10 @@ int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii) mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); return 0; } -EXPORT_SYMBOL(vfs_get_dqinfo); +EXPORT_SYMBOL(dquot_get_dqinfo); /* Generic routine for setting common part of quota file information */ -int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii) +int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii) { struct mem_dqinfo *mi; int err = 0; @@ -2496,27 +2465,27 @@ out: mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); return err; } -EXPORT_SYMBOL(vfs_set_dqinfo); +EXPORT_SYMBOL(dquot_set_dqinfo); -const struct quotactl_ops vfs_quotactl_ops = { - .quota_on = vfs_quota_on, - .quota_off = vfs_quota_off, - .quota_sync = vfs_quota_sync, - .get_info = vfs_get_dqinfo, - .set_info = vfs_set_dqinfo, - .get_dqblk = vfs_get_dqblk, - .set_dqblk = vfs_set_dqblk +const struct quotactl_ops dquot_quotactl_ops = { + .quota_on = dquot_quota_on, + .quota_off = dquot_quota_off, + .quota_sync = dquot_quota_sync, + .get_info = dquot_get_dqinfo, + .set_info = dquot_set_dqinfo, + .get_dqblk = dquot_get_dqblk, + .set_dqblk = dquot_set_dqblk }; - +EXPORT_SYMBOL(dquot_quotactl_ops); static int do_proc_dqstats(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { -#ifdef CONFIG_SMP - /* Update global table */ unsigned int type = (int *)table->data - dqstats.stat; - dqstats.stat[type] = dqstats_read(type); -#endif + + /* Update global table */ + dqstats.stat[type] = + percpu_counter_sum_positive(&dqstats.counter[type]); return proc_dointvec(table, write, buffer, lenp, ppos); } @@ -2609,7 +2578,7 @@ static ctl_table sys_table[] = { static int __init dquot_init(void) { - int i; + int i, ret; unsigned long nr_hash, order; printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__); @@ -2627,12 +2596,11 @@ static int __init dquot_init(void) if (!dquot_hash) panic("Cannot create dquot hash table"); -#ifdef CONFIG_SMP - dqstats_pcpu = alloc_percpu(struct dqstats); - if (!dqstats_pcpu) - panic("Cannot create dquot stats table"); -#endif - memset(&dqstats, 0, sizeof(struct dqstats)); + for (i = 0; i < _DQST_DQSTAT_LAST; i++) { + ret = percpu_counter_init(&dqstats.counter[i], 0); + if (ret) + panic("Cannot create dquot stat counters"); + } /* Find power-of-two hlist_heads which can fit into allocation */ nr_hash = (1UL << order) * PAGE_SIZE / sizeof(struct hlist_head); diff --git a/fs/quota/quota.c b/fs/quota/quota.c index ce3dfd066f5..b299961e1ed 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -73,7 +73,7 @@ static int quota_quotaon(struct super_block *sb, int type, int cmd, qid_t id, if (IS_ERR(pathname)) return PTR_ERR(pathname); if (sb->s_qcop->quota_on) - ret = sb->s_qcop->quota_on(sb, type, id, pathname, 0); + ret = sb->s_qcop->quota_on(sb, type, id, pathname); putname(pathname); return ret; } @@ -260,7 +260,7 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, case Q_QUOTAOFF: if (!sb->s_qcop->quota_off) return -ENOSYS; - return sb->s_qcop->quota_off(sb, type, 0); + return sb->s_qcop->quota_off(sb, type); case Q_GETFMT: return quota_getfmt(sb, type, addr); case Q_GETINFO: |