1 files changed, 76 insertions, 20 deletions

diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index a558a4c1d35a..21b781a3350f 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -24,12 +24,21 @@ void sync_dquots(struct super_block *sb, int type);
 
 int dquot_initialize(struct inode *inode, int type);
 int dquot_drop(struct inode *inode);
+int dquot_drop_locked(struct inode *inode);
+struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
+void dqput(struct dquot *dquot);
+int dquot_is_cached(struct super_block *sb, unsigned int id, int type);
+int dquot_scan_active(struct super_block *sb,
+                      int (*fn)(struct dquot *dquot, unsigned long priv),
+                      unsigned long priv);
+struct dquot *dquot_alloc(struct super_block *sb, int type);
+void dquot_destroy(struct dquot *dquot);
 
 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
-int dquot_alloc_inode(const struct inode *inode, unsigned long number);
+int dquot_alloc_inode(const struct inode *inode, qsize_t number);
 
 int dquot_free_space(struct inode *inode, qsize_t number);
-int dquot_free_inode(const struct inode *inode, unsigned long number);
+int dquot_free_inode(const struct inode *inode, qsize_t number);
 
 int dquot_transfer(struct inode *inode, struct iattr *iattr);
 int dquot_commit(struct dquot *dquot);
@@ -40,11 +49,14 @@ int dquot_mark_dquot_dirty(struct dquot *dquot);
 
 int vfs_quota_on(struct super_block *sb, int type, int format_id,
         char *path, int remount);
+int vfs_quota_enable(struct inode *inode, int type, int format_id,
+        unsigned int flags);
 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
         struct path *path);
 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
         int format_id, int type);
 int vfs_quota_off(struct super_block *sb, int type, int remount);
+int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
 int vfs_quota_sync(struct super_block *sb, int type);
 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
@@ -64,24 +76,22 @@ static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
  * Functions for checking status of quota
  */
 
-static inline int sb_has_quota_enabled(struct super_block *sb, int type)
+static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
 {
-        if (type == USRQUOTA)
-                return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
-        return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
+        return sb_dqopt(sb)->flags &
+                                dquot_state_flag(DQUOT_USAGE_ENABLED, type);
 }
 
-static inline int sb_any_quota_enabled(struct super_block *sb)
+static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
 {
-        return sb_has_quota_enabled(sb, USRQUOTA) ||
-                sb_has_quota_enabled(sb, GRPQUOTA);
+        return sb_dqopt(sb)->flags &
+                                dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
 }
 
 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
 {
-        if (type == USRQUOTA)
-                return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
-        return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
+        return sb_dqopt(sb)->flags &
+                                dquot_state_flag(DQUOT_SUSPENDED, type);
 }
 
 static inline int sb_any_quota_suspended(struct super_block *sb)
@@ -90,6 +100,31 @@ static inline int sb_any_quota_suspended(struct super_block *sb)
                 sb_has_quota_suspended(sb, GRPQUOTA);
 }
 
+/* Does kernel know about any quota information for given sb + type? */
+static inline int sb_has_quota_loaded(struct super_block *sb, int type)
+{
+        /* Currently if anything is on, then quota usage is on as well */
+        return sb_has_quota_usage_enabled(sb, type);
+}
+
+static inline int sb_any_quota_loaded(struct super_block *sb)
+{
+        return sb_has_quota_loaded(sb, USRQUOTA) ||
+                sb_has_quota_loaded(sb, GRPQUOTA);
+}
+
+static inline int sb_has_quota_active(struct super_block *sb, int type)
+{
+        return sb_has_quota_loaded(sb, type) &&
+               !sb_has_quota_suspended(sb, type);
+}
+
+static inline int sb_any_quota_active(struct super_block *sb)
+{
+        return sb_has_quota_active(sb, USRQUOTA) ||
+               sb_has_quota_active(sb, GRPQUOTA);
+}
+
 /*
  * Operations supported for diskquotas.
  */
@@ -104,7 +139,7 @@ extern struct quotactl_ops vfs_quotactl_ops;
 static inline void vfs_dq_init(struct inode *inode)
 {
         BUG_ON(!inode->i_sb);
-        if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
+        if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
                 inode->i_sb->dq_op->initialize(inode, -1);
 }
 
@@ -112,7 +147,7 @@ static inline void vfs_dq_init(struct inode *inode)
  * a transaction (deadlocks possible otherwise) */
 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
 {
-        if (sb_any_quota_enabled(inode->i_sb)) {
+        if (sb_any_quota_active(inode->i_sb)) {
                 /* Used space is updated in alloc_space() */
                 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
                         return 1;
@@ -132,7 +167,7 @@ static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
 
 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
 {
-        if (sb_any_quota_enabled(inode->i_sb)) {
+        if (sb_any_quota_active(inode->i_sb)) {
                 /* Used space is updated in alloc_space() */
                 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
                         return 1;
@@ -152,7 +187,7 @@ static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
 
 static inline int vfs_dq_alloc_inode(struct inode *inode)
 {
-        if (sb_any_quota_enabled(inode->i_sb)) {
+        if (sb_any_quota_active(inode->i_sb)) {
                 vfs_dq_init(inode);
                 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
                         return 1;
@@ -162,7 +197,7 @@ static inline int vfs_dq_alloc_inode(struct inode *inode)
 
 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
 {
-        if (sb_any_quota_enabled(inode->i_sb))
+        if (sb_any_quota_active(inode->i_sb))
                 inode->i_sb->dq_op->free_space(inode, nr);
         else
                 inode_sub_bytes(inode, nr);
@@ -176,7 +211,7 @@ static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
 
 static inline void vfs_dq_free_inode(struct inode *inode)
 {
-        if (sb_any_quota_enabled(inode->i_sb))
+        if (sb_any_quota_active(inode->i_sb))
                 inode->i_sb->dq_op->free_inode(inode, 1);
 }
 
@@ -197,12 +232,12 @@ static inline int vfs_dq_off(struct super_block *sb, int remount)
 
 #else
 
-static inline int sb_has_quota_enabled(struct super_block *sb, int type)
+static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
 {
         return 0;
 }
 
-static inline int sb_any_quota_enabled(struct super_block *sb)
+static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
 {
         return 0;
 }
@@ -217,6 +252,27 @@ static inline int sb_any_quota_suspended(struct super_block *sb)
         return 0;
 }
 
+/* Does kernel know about any quota information for given sb + type? */
+static inline int sb_has_quota_loaded(struct super_block *sb, int type)
+{
+        return 0;
+}
+
+static inline int sb_any_quota_loaded(struct super_block *sb)
+{
+        return 0;
+}
+
+static inline int sb_has_quota_active(struct super_block *sb, int type)
+{
+        return 0;
+}
+
+static inline int sb_any_quota_active(struct super_block *sb)
+{
+        return 0;
+}
+
 /*
  * NO-OP when quota not configured.
  */