quota: use flags interface for dquot alloc/free space

Switch __dquot_alloc_space and __dquot_free_space to take flags
to indicate whether to warn and/or to reserve (or free reserve).

This is slightly more readable at the callpoints, and makes it
cleaner to add a "nofail" option in the next patch.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 788b580..8c40c07 100644 (file)
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1488,11 +1488,12 @@ 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;
 
        /*
         * First test before acquiring mutex - solves deadlocks when we
@@ -1612,10 +1613,11 @@ 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 */

diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index e6fa7ac..9edd53c 100644 (file)
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -9,6 +9,9 @@
 
 #include <linux/fs.h>
 
+#define DQUOT_SPACE_WARN       0x1
+#define DQUOT_SPACE_RESERVE    0x2
+
 static inline struct quota_info *sb_dqopt(struct super_block *sb)
 {
        return &sb->s_dquot;
@@ -33,9 +36,8 @@ int dquot_scan_active(struct super_block *sb,
 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 warn, int reserve);
-void __dquot_free_space(struct inode *inode, qsize_t number, int reserve);
+int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
+void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
 
 int dquot_alloc_inode(const struct inode *inode);
 
@@ -231,17 +233,17 @@ static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
 }
 
 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
-               int warn, int reserve)
+               int flags)
 {
-       if (!reserve)
+       if (!(flags & DQUOT_SPACE_RESERVE))
                inode_add_bytes(inode, number);
        return 0;
 }
 
 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
-               int reserve)
+               int flags)
 {
-       if (!reserve)
+       if (!(flags & DQUOT_SPACE_RESERVE))
                inode_sub_bytes(inode, number);
 }
 
@@ -257,7 +259,7 @@ static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
 
 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
 {
-       return __dquot_alloc_space(inode, nr, 1, 0);
+       return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
 }
 
 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
@@ -282,7 +284,7 @@ static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
 
 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
 {
-       return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
+       return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
 }
 
 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
@@ -297,7 +299,8 @@ static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
 
 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
 {
-       return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
+       return __dquot_alloc_space(inode, nr << inode->i_blkbits,
+                               DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
 }
 
 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
@@ -334,7 +337,7 @@ static inline void dquot_free_block(struct inode *inode, qsize_t nr)
 static inline void dquot_release_reservation_block(struct inode *inode,
                qsize_t nr)
 {
-       __dquot_free_space(inode, nr << inode->i_blkbits, 1);
+       __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
 }
 
 #endif /* _LINUX_QUOTAOPS_ */