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-rw-r--r--fs/quota/dquot.c408
1 files changed, 219 insertions, 189 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 788b5802a7ce..12c233da1b6b 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -82,7 +82,7 @@
/*
* There are three quota SMP locks. dq_list_lock protects all lists with quotas
- * and quota formats, dqstats structure containing statistics about the lists
+ * 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
@@ -132,7 +132,9 @@ static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_state_lock);
__cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_data_lock);
EXPORT_SYMBOL(dq_data_lock);
+#if defined(CONFIG_QUOTA_DEBUG) || defined(CONFIG_PRINT_QUOTA_WARNING)
static char *quotatypes[] = INITQFNAMES;
+#endif
static struct quota_format_type *quota_formats; /* List of registered formats */
static struct quota_module_name module_names[] = INIT_QUOTA_MODULE_NAMES;
@@ -273,7 +275,7 @@ static struct dquot *find_dquot(unsigned int hashent, struct super_block *sb,
static inline void put_dquot_last(struct dquot *dquot)
{
list_add_tail(&dquot->dq_free, &free_dquots);
- dqstats.free_dquots++;
+ dqstats_inc(DQST_FREE_DQUOTS);
}
static inline void remove_free_dquot(struct dquot *dquot)
@@ -281,7 +283,7 @@ static inline void remove_free_dquot(struct dquot *dquot)
if (list_empty(&dquot->dq_free))
return;
list_del_init(&dquot->dq_free);
- dqstats.free_dquots--;
+ dqstats_dec(DQST_FREE_DQUOTS);
}
static inline void put_inuse(struct dquot *dquot)
@@ -289,12 +291,12 @@ static inline void put_inuse(struct dquot *dquot)
/* We add to the back of inuse list so we don't have to restart
* when traversing this list and we block */
list_add_tail(&dquot->dq_inuse, &inuse_list);
- dqstats.allocated_dquots++;
+ dqstats_inc(DQST_ALLOC_DQUOTS);
}
static inline void remove_inuse(struct dquot *dquot)
{
- dqstats.allocated_dquots--;
+ dqstats_dec(DQST_ALLOC_DQUOTS);
list_del(&dquot->dq_inuse);
}
/*
@@ -317,14 +319,23 @@ static inline int mark_dquot_dirty(struct dquot *dquot)
return dquot->dq_sb->dq_op->mark_dirty(dquot);
}
+/* Mark dquot dirty in atomic manner, and return it's old dirty flag state */
int dquot_mark_dquot_dirty(struct dquot *dquot)
{
+ int ret = 1;
+
+ /* If quota is dirty already, we don't have to acquire dq_list_lock */
+ if (test_bit(DQ_MOD_B, &dquot->dq_flags))
+ return 1;
+
spin_lock(&dq_list_lock);
- if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags))
+ if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) {
list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
info[dquot->dq_type].dqi_dirty_list);
+ ret = 0;
+ }
spin_unlock(&dq_list_lock);
- return 0;
+ return ret;
}
EXPORT_SYMBOL(dquot_mark_dquot_dirty);
@@ -550,8 +561,8 @@ int dquot_scan_active(struct super_block *sb,
continue;
/* Now we have active dquot so we can just increase use count */
atomic_inc(&dquot->dq_count);
- dqstats.lookups++;
spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_LOOKUPS);
dqput(old_dquot);
old_dquot = dquot;
ret = fn(dquot, priv);
@@ -569,7 +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;
@@ -596,8 +607,8 @@ int vfs_quota_sync(struct super_block *sb, int type, int wait)
* holding reference so we can safely just increase
* use count */
atomic_inc(&dquot->dq_count);
- dqstats.lookups++;
spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_LOOKUPS);
sb->dq_op->write_dquot(dquot);
dqput(dquot);
spin_lock(&dq_list_lock);
@@ -609,9 +620,7 @@ int vfs_quota_sync(struct super_block *sb, int type, int wait)
if ((cnt == type || type == -1) && sb_has_quota_active(sb, cnt)
&& info_dirty(&dqopt->info[cnt]))
sb->dq_op->write_info(sb, cnt);
- spin_lock(&dq_list_lock);
- dqstats.syncs++;
- spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_SYNCS);
mutex_unlock(&dqopt->dqonoff_mutex);
if (!wait || (sb_dqopt(sb)->flags & DQUOT_QUOTA_SYS_FILE))
@@ -643,7 +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)
@@ -667,7 +676,6 @@ static void prune_dqcache(int 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) {
@@ -675,7 +683,9 @@ static int shrink_dqcache_memory(int nr, gfp_t gfp_mask)
prune_dqcache(nr);
spin_unlock(&dq_list_lock);
}
- return (dqstats.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 = {
@@ -703,10 +713,7 @@ void dqput(struct dquot *dquot)
BUG();
}
#endif
-
- spin_lock(&dq_list_lock);
- dqstats.drops++;
- spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_DROPS);
we_slept:
spin_lock(&dq_list_lock);
if (atomic_read(&dquot->dq_count) > 1) {
@@ -823,15 +830,15 @@ we_slept:
put_inuse(dquot);
/* hash it first so it can be found */
insert_dquot_hash(dquot);
- dqstats.lookups++;
spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_LOOKUPS);
} else {
if (!atomic_read(&dquot->dq_count))
remove_free_dquot(dquot);
atomic_inc(&dquot->dq_count);
- dqstats.cache_hits++;
- dqstats.lookups++;
spin_unlock(&dq_list_lock);
+ dqstats_inc(DQST_CACHE_HITS);
+ dqstats_inc(DQST_LOOKUPS);
}
/* Wait for dq_lock - after this we know that either dquot_release() is
* already finished or it will be canceled due to dq_count > 1 test */
@@ -1488,11 +1495,13 @@ static void inode_decr_space(struct inode *inode, qsize_t number, int reserve)
/*
* This operation can block, but only after everything is updated
*/
-int __dquot_alloc_space(struct inode *inode, qsize_t number,
- int warn, int reserve)
+int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
{
int cnt, ret = 0;
char warntype[MAXQUOTAS];
+ int warn = flags & DQUOT_SPACE_WARN;
+ int reserve = flags & DQUOT_SPACE_RESERVE;
+ int nofail = flags & DQUOT_SPACE_NOFAIL;
/*
* First test before acquiring mutex - solves deadlocks when we
@@ -1513,7 +1522,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number,
continue;
ret = check_bdq(inode->i_dquot[cnt], number, !warn,
warntype+cnt);
- if (ret) {
+ if (ret && !nofail) {
spin_unlock(&dq_data_lock);
goto out_flush_warn;
}
@@ -1612,10 +1621,11 @@ EXPORT_SYMBOL(dquot_claim_space_nodirty);
/*
* This operation can block, but only after everything is updated
*/
-void __dquot_free_space(struct inode *inode, qsize_t number, int reserve)
+void __dquot_free_space(struct inode *inode, qsize_t number, int flags)
{
unsigned int cnt;
char warntype[MAXQUOTAS];
+ int reserve = flags & DQUOT_SPACE_RESERVE;
/* First test before acquiring mutex - solves deadlocks when we
* re-enter the quota code and are already holding the mutex */
@@ -1677,16 +1687,19 @@ EXPORT_SYMBOL(dquot_free_inode);
/*
* Transfer the number of inode and blocks from one diskquota to an other.
+ * On success, dquot references in transfer_to are consumed and references
+ * to original dquots that need to be released are placed there. On failure,
+ * references are kept untouched.
*
* This operation can block, but only after everything is updated
* A transaction must be started when entering this function.
+ *
*/
-static int __dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask)
+int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
{
qsize_t space, cur_space;
qsize_t rsv_space = 0;
- struct dquot *transfer_from[MAXQUOTAS];
- struct dquot *transfer_to[MAXQUOTAS];
+ struct dquot *transfer_from[MAXQUOTAS] = {};
int cnt, ret = 0;
char warntype_to[MAXQUOTAS];
char warntype_from_inodes[MAXQUOTAS], warntype_from_space[MAXQUOTAS];
@@ -1696,19 +1709,12 @@ static int __dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask
if (IS_NOQUOTA(inode))
return 0;
/* Initialize the arrays */
- for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- transfer_from[cnt] = NULL;
- transfer_to[cnt] = NULL;
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++)
warntype_to[cnt] = QUOTA_NL_NOWARN;
- }
- for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- if (mask & (1 << cnt))
- transfer_to[cnt] = dqget(inode->i_sb, chid[cnt], cnt);
- }
down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
if (IS_NOQUOTA(inode)) { /* File without quota accounting? */
up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
- goto put_all;
+ return 0;
}
spin_lock(&dq_data_lock);
cur_space = inode_get_bytes(inode);
@@ -1760,47 +1766,41 @@ static int __dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask
mark_all_dquot_dirty(transfer_from);
mark_all_dquot_dirty(transfer_to);
- /* The reference we got is transferred to the inode */
+ /* Pass back references to put */
for (cnt = 0; cnt < MAXQUOTAS; cnt++)
- transfer_to[cnt] = NULL;
-warn_put_all:
+ transfer_to[cnt] = transfer_from[cnt];
+warn:
flush_warnings(transfer_to, warntype_to);
flush_warnings(transfer_from, warntype_from_inodes);
flush_warnings(transfer_from, warntype_from_space);
-put_all:
- dqput_all(transfer_from);
- dqput_all(transfer_to);
return ret;
over_quota:
spin_unlock(&dq_data_lock);
up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
- /* Clear dquot pointers we don't want to dqput() */
- for (cnt = 0; cnt < MAXQUOTAS; cnt++)
- transfer_from[cnt] = NULL;
- goto warn_put_all;
+ goto warn;
}
+EXPORT_SYMBOL(__dquot_transfer);
/* Wrapper for transferring ownership of an inode for uid/gid only
* Called from FSXXX_setattr()
*/
int dquot_transfer(struct inode *inode, struct iattr *iattr)
{
- qid_t chid[MAXQUOTAS];
- unsigned long mask = 0;
+ struct dquot *transfer_to[MAXQUOTAS] = {};
+ struct super_block *sb = inode->i_sb;
+ int ret;
- if (iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) {
- mask |= 1 << USRQUOTA;
- chid[USRQUOTA] = iattr->ia_uid;
- }
- if (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid) {
- mask |= 1 << GRPQUOTA;
- chid[GRPQUOTA] = iattr->ia_gid;
- }
- if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode)) {
- dquot_initialize(inode);
- return __dquot_transfer(inode, chid, mask);
- }
- return 0;
+ if (!sb_any_quota_active(sb) || IS_NOQUOTA(inode))
+ return 0;
+
+ 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_gid, GRPQUOTA);
+
+ ret = __dquot_transfer(inode, transfer_to);
+ dqput_all(transfer_to);
+ return ret;
}
EXPORT_SYMBOL(dquot_transfer);
@@ -1831,6 +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.
@@ -1849,7 +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);
@@ -1979,14 +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
*/
@@ -2104,36 +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);
@@ -2148,40 +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? */
@@ -2213,13 +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;
@@ -2245,24 +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)
{
@@ -2275,25 +2263,30 @@ static inline qsize_t stoqb(qsize_t space)
}
/* Generic routine for getting common part of quota structure */
-static void do_get_dqblk(struct dquot *dquot, struct if_dqblk *di)
+static void do_get_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
{
struct mem_dqblk *dm = &dquot->dq_dqb;
+ memset(di, 0, sizeof(*di));
+ di->d_version = FS_DQUOT_VERSION;
+ di->d_flags = dquot->dq_type == USRQUOTA ?
+ XFS_USER_QUOTA : XFS_GROUP_QUOTA;
+ di->d_id = dquot->dq_id;
+
spin_lock(&dq_data_lock);
- di->dqb_bhardlimit = stoqb(dm->dqb_bhardlimit);
- di->dqb_bsoftlimit = stoqb(dm->dqb_bsoftlimit);
- di->dqb_curspace = dm->dqb_curspace + dm->dqb_rsvspace;
- di->dqb_ihardlimit = dm->dqb_ihardlimit;
- di->dqb_isoftlimit = dm->dqb_isoftlimit;
- di->dqb_curinodes = dm->dqb_curinodes;
- di->dqb_btime = dm->dqb_btime;
- di->dqb_itime = dm->dqb_itime;
- di->dqb_valid = QIF_ALL;
+ di->d_blk_hardlimit = stoqb(dm->dqb_bhardlimit);
+ di->d_blk_softlimit = stoqb(dm->dqb_bsoftlimit);
+ di->d_ino_hardlimit = dm->dqb_ihardlimit;
+ di->d_ino_softlimit = dm->dqb_isoftlimit;
+ di->d_bcount = dm->dqb_curspace + dm->dqb_rsvspace;
+ di->d_icount = dm->dqb_curinodes;
+ di->d_btimer = dm->dqb_btime;
+ di->d_itimer = dm->dqb_itime;
spin_unlock(&dq_data_lock);
}
-int vfs_get_dqblk(struct super_block *sb, int type, qid_t id,
- struct if_dqblk *di)
+int dquot_get_dqblk(struct super_block *sb, int type, qid_t id,
+ struct fs_disk_quota *di)
{
struct dquot *dquot;
@@ -2305,53 +2298,72 @@ 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 | \
+ FS_DQ_ICOUNT | FS_DQ_ISOFT | FS_DQ_IHARD | \
+ FS_DQ_BTIMER | FS_DQ_ITIMER)
/* Generic routine for setting common part of quota structure */
-static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
+static int do_set_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
{
struct mem_dqblk *dm = &dquot->dq_dqb;
int check_blim = 0, check_ilim = 0;
struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
- if ((di->dqb_valid & QIF_BLIMITS &&
- (di->dqb_bhardlimit > dqi->dqi_maxblimit ||
- di->dqb_bsoftlimit > dqi->dqi_maxblimit)) ||
- (di->dqb_valid & QIF_ILIMITS &&
- (di->dqb_ihardlimit > dqi->dqi_maxilimit ||
- di->dqb_isoftlimit > dqi->dqi_maxilimit)))
+ if (di->d_fieldmask & ~VFS_FS_DQ_MASK)
+ return -EINVAL;
+
+ if (((di->d_fieldmask & FS_DQ_BSOFT) &&
+ (di->d_blk_softlimit > dqi->dqi_maxblimit)) ||
+ ((di->d_fieldmask & FS_DQ_BHARD) &&
+ (di->d_blk_hardlimit > dqi->dqi_maxblimit)) ||
+ ((di->d_fieldmask & FS_DQ_ISOFT) &&
+ (di->d_ino_softlimit > dqi->dqi_maxilimit)) ||
+ ((di->d_fieldmask & FS_DQ_IHARD) &&
+ (di->d_ino_hardlimit > dqi->dqi_maxilimit)))
return -ERANGE;
spin_lock(&dq_data_lock);
- if (di->dqb_valid & QIF_SPACE) {
- dm->dqb_curspace = di->dqb_curspace - dm->dqb_rsvspace;
+ if (di->d_fieldmask & FS_DQ_BCOUNT) {
+ dm->dqb_curspace = di->d_bcount - dm->dqb_rsvspace;
check_blim = 1;
set_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
}
- if (di->dqb_valid & QIF_BLIMITS) {
- dm->dqb_bsoftlimit = qbtos(di->dqb_bsoftlimit);
- dm->dqb_bhardlimit = qbtos(di->dqb_bhardlimit);
+
+ if (di->d_fieldmask & FS_DQ_BSOFT)
+ dm->dqb_bsoftlimit = qbtos(di->d_blk_softlimit);
+ if (di->d_fieldmask & FS_DQ_BHARD)
+ dm->dqb_bhardlimit = qbtos(di->d_blk_hardlimit);
+ if (di->d_fieldmask & (FS_DQ_BSOFT | FS_DQ_BHARD)) {
check_blim = 1;
set_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
}
- if (di->dqb_valid & QIF_INODES) {
- dm->dqb_curinodes = di->dqb_curinodes;
+
+ if (di->d_fieldmask & FS_DQ_ICOUNT) {
+ dm->dqb_curinodes = di->d_icount;
check_ilim = 1;
set_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
}
- if (di->dqb_valid & QIF_ILIMITS) {
- dm->dqb_isoftlimit = di->dqb_isoftlimit;
- dm->dqb_ihardlimit = di->dqb_ihardlimit;
+
+ if (di->d_fieldmask & FS_DQ_ISOFT)
+ dm->dqb_isoftlimit = di->d_ino_softlimit;
+ if (di->d_fieldmask & FS_DQ_IHARD)
+ dm->dqb_ihardlimit = di->d_ino_hardlimit;
+ if (di->d_fieldmask & (FS_DQ_ISOFT | FS_DQ_IHARD)) {
check_ilim = 1;
set_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
}
- if (di->dqb_valid & QIF_BTIME) {
- dm->dqb_btime = di->dqb_btime;
+
+ if (di->d_fieldmask & FS_DQ_BTIMER) {
+ dm->dqb_btime = di->d_btimer;
check_blim = 1;
set_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
}
- if (di->dqb_valid & QIF_ITIME) {
- dm->dqb_itime = di->dqb_itime;
+
+ if (di->d_fieldmask & FS_DQ_ITIMER) {
+ dm->dqb_itime = di->d_itimer;
check_ilim = 1;
set_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
}
@@ -2361,7 +2373,7 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
dm->dqb_curspace < dm->dqb_bsoftlimit) {
dm->dqb_btime = 0;
clear_bit(DQ_BLKS_B, &dquot->dq_flags);
- } else if (!(di->dqb_valid & QIF_BTIME))
+ } else if (!(di->d_fieldmask & FS_DQ_BTIMER))
/* Set grace only if user hasn't provided his own... */
dm->dqb_btime = get_seconds() + dqi->dqi_bgrace;
}
@@ -2370,7 +2382,7 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
dm->dqb_curinodes < dm->dqb_isoftlimit) {
dm->dqb_itime = 0;
clear_bit(DQ_INODES_B, &dquot->dq_flags);
- } else if (!(di->dqb_valid & QIF_ITIME))
+ } else if (!(di->d_fieldmask & FS_DQ_ITIMER))
/* Set grace only if user hasn't provided his own... */
dm->dqb_itime = get_seconds() + dqi->dqi_igrace;
}
@@ -2385,8 +2397,8 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
return 0;
}
-int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
- struct if_dqblk *di)
+int dquot_set_dqblk(struct super_block *sb, int type, qid_t id,
+ struct fs_disk_quota *di)
{
struct dquot *dquot;
int rc;
@@ -2401,10 +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;
@@ -2423,10 +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;
@@ -2453,74 +2465,86 @@ 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)
+{
+ unsigned int type = (int *)table->data - dqstats.stat;
+
+ /* Update global table */
+ dqstats.stat[type] =
+ percpu_counter_sum_positive(&dqstats.counter[type]);
+ return proc_dointvec(table, write, buffer, lenp, ppos);
+}
static ctl_table fs_dqstats_table[] = {
{
.procname = "lookups",
- .data = &dqstats.lookups,
+ .data = &dqstats.stat[DQST_LOOKUPS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "drops",
- .data = &dqstats.drops,
+ .data = &dqstats.stat[DQST_DROPS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "reads",
- .data = &dqstats.reads,
+ .data = &dqstats.stat[DQST_READS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "writes",
- .data = &dqstats.writes,
+ .data = &dqstats.stat[DQST_WRITES],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "cache_hits",
- .data = &dqstats.cache_hits,
+ .data = &dqstats.stat[DQST_CACHE_HITS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "allocated_dquots",
- .data = &dqstats.allocated_dquots,
+ .data = &dqstats.stat[DQST_ALLOC_DQUOTS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "free_dquots",
- .data = &dqstats.free_dquots,
+ .data = &dqstats.stat[DQST_FREE_DQUOTS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
{
.procname = "syncs",
- .data = &dqstats.syncs,
+ .data = &dqstats.stat[DQST_SYNCS],
.maxlen = sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = do_proc_dqstats,
},
#ifdef CONFIG_PRINT_QUOTA_WARNING
{
@@ -2554,7 +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__);
@@ -2572,6 +2596,12 @@ static int __init dquot_init(void)
if (!dquot_hash)
panic("Cannot create dquot hash table");
+ 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);
dq_hash_bits = 0;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 13:28:46 +0300