2 files changed, 87 insertions, 43 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index d72d5d84fde5..78c48895b12a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -198,6 +198,7 @@ struct mem_dqblk {
         qsize_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
         qsize_t dqb_bsoftlimit; /* preferred limit on disk blks */
         qsize_t dqb_curspace;   /* current used space */
+        qsize_t dqb_rsvspace;   /* current reserved space for delalloc*/
         qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */
         qsize_t dqb_isoftlimit; /* preferred inode limit */
         qsize_t dqb_curinodes;  /* current # allocated inodes */
@@ -276,8 +277,6 @@ struct dquot {
         struct mem_dqblk dq_dqb;        /* Diskquota usage */
 };
 
-#define NODQUOT (struct dquot *)NULL
-
 #define QUOTA_OK          0
 #define NO_QUOTA          1
 
@@ -308,6 +307,14 @@ struct dquot_operations {
         int (*release_dquot) (struct dquot *);          /* Quota is going to be deleted from disk */
         int (*mark_dirty) (struct dquot *);             /* Dquot is marked dirty */
         int (*write_info) (struct super_block *, int);  /* Write of quota "superblock" */
+        /* reserve quota for delayed block allocation */
+        int (*reserve_space) (struct inode *, qsize_t, int);
+        /* claim reserved quota for delayed alloc */
+        int (*claim_space) (struct inode *, qsize_t);
+        /* release rsved quota for delayed alloc */
+        void (*release_rsv) (struct inode *, qsize_t);
+        /* get reserved quota for delayed alloc */
+        qsize_t (*get_reserved_space) (struct inode *);
 };
 
 /* Operations handling requests from userspace */
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 0b35b3a1be05..36353d95c8db 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -35,6 +35,11 @@ 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, qsize_t number);
 
+int dquot_reserve_space(struct inode *inode, qsize_t number, int prealloc);
+int dquot_claim_space(struct inode *inode, qsize_t number);
+void dquot_release_reserved_space(struct inode *inode, qsize_t number);
+qsize_t dquot_get_reserved_space(struct inode *inode);
+
 int dquot_free_space(struct inode *inode, qsize_t number);
 int dquot_free_inode(const struct inode *inode, qsize_t number);
 
@@ -183,6 +188,16 @@ static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
         return ret;
 }
 
+static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
+{
+        if (sb_any_quota_active(inode->i_sb)) {
+                /* Used space is updated in alloc_space() */
+                if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
+                        return 1;
+        }
+        return 0;
+}
+
 static inline int vfs_dq_alloc_inode(struct inode *inode)
 {
         if (sb_any_quota_active(inode->i_sb)) {
@@ -193,6 +208,31 @@ static inline int vfs_dq_alloc_inode(struct inode *inode)
         return 0;
 }
 
+/*
+ * Convert in-memory reserved quotas to real consumed quotas
+ */
+static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
+{
+        if (sb_any_quota_active(inode->i_sb)) {
+                if (inode->i_sb->dq_op->claim_space(inode, nr) == NO_QUOTA)
+                        return 1;
+        } else
+                inode_add_bytes(inode, nr);
+
+        mark_inode_dirty(inode);
+        return 0;
+}
+
+/*
+ * Release reserved (in-memory) quotas
+ */
+static inline
+void vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
+{
+        if (sb_any_quota_active(inode->i_sb))
+                inode->i_sb->dq_op->release_rsv(inode, nr);
+}
+
 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
 {
         if (sb_any_quota_active(inode->i_sb))
@@ -339,6 +379,22 @@ static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
         return 0;
 }
 
+static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
+{
+        return 0;
+}
+
+static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
+{
+        return vfs_dq_alloc_space(inode, nr);
+}
+
+static inline
+int vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
+{
+        return 0;
+}
+
 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
 {
         inode_sub_bytes(inode, nr);
@@ -354,67 +410,48 @@ static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
 
 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
 {
-        return vfs_dq_prealloc_space_nodirty(inode,
-                        nr << inode->i_sb->s_blocksize_bits);
+        return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
 }
 
 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
 {
-        return vfs_dq_prealloc_space(inode,
-                        nr << inode->i_sb->s_blocksize_bits);
+        return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
 }
 
 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
 {
-        return vfs_dq_alloc_space_nodirty(inode,
-                        nr << inode->i_sb->s_blocksize_bits);
+        return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
 }
 
 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
 {
-        return vfs_dq_alloc_space(inode,
-                        nr << inode->i_sb->s_blocksize_bits);
+        return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
+}
+
+static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
+{
+        return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
+}
+
+static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
+{
+        return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
+}
+
+static inline
+void vfs_dq_release_reservation_block(struct inode *inode, qsize_t nr)
+{
+        vfs_dq_release_reservation_space(inode, nr << inode->i_blkbits);
 }
 
 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
 {
-        vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
+        vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
 }
 
 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
 {
-        vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
+        vfs_dq_free_space(inode, nr << inode->i_blkbits);
 }
 
-/*
- * Define uppercase equivalents for compatibility with old function names
- * Can go away when we think all users have been converted (15/04/2008)
- */
-#define DQUOT_INIT(inode) vfs_dq_init(inode)
-#define DQUOT_DROP(inode) vfs_dq_drop(inode)
-#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
-                                vfs_dq_prealloc_space_nodirty(inode, nr)
-#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
-#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
-                                vfs_dq_alloc_space_nodirty(inode, nr)
-#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
-#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
-                                vfs_dq_prealloc_block_nodirty(inode, nr)
-#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
-#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
-                                vfs_dq_alloc_block_nodirty(inode, nr)
-#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
-#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
-#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
-                                vfs_dq_free_space_nodirty(inode, nr)
-#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
-#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
-                                vfs_dq_free_block_nodirty(inode, nr)
-#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
-#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
-#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
-#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
-#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
-#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
-
 #endif /* _LINUX_QUOTAOPS_ */