ext4: provide wrappers for transaction reservation calls

Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 21 insertions, 5 deletions

diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index c8c6885406db..fdd865eb1879 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -265,7 +265,7 @@ int __ext4_handle_dirty_super(const char *where, unsigned int line,
 	__ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb))
 
 handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
-				  int type, int nblocks);
+				  int type, int blocks, int rsv_blocks);
 int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
 
 #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096)
@@ -300,21 +300,37 @@ static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed)
 }
 
 #define ext4_journal_start_sb(sb, type, nblocks)			\
-	__ext4_journal_start_sb((sb), __LINE__, (type), (nblocks))
+	__ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0)
 
 #define ext4_journal_start(inode, type, nblocks)			\
-	__ext4_journal_start((inode), __LINE__, (type), (nblocks))
+	__ext4_journal_start((inode), __LINE__, (type), (nblocks), 0)
+
+#define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks) \
+	__ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks))
 
 static inline handle_t *__ext4_journal_start(struct inode *inode,
 					     unsigned int line, int type,
-					     int nblocks)
+					     int blocks, int rsv_blocks)
 {
-	return __ext4_journal_start_sb(inode->i_sb, line, type, nblocks);
+	return __ext4_journal_start_sb(inode->i_sb, line, type, blocks,
+				       rsv_blocks);
 }
 
 #define ext4_journal_stop(handle) \
 	__ext4_journal_stop(__func__, __LINE__, (handle))
 
+#define ext4_journal_start_reserve(handle, type) \
+	__ext4_journal_start_reserved((handle), __LINE__, (type))
+
+handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
+					int type);
+
+static inline void ext4_journal_free_reserved(handle_t *handle)
+{
+	if (ext4_handle_valid(handle))
+		jbd2_journal_free_reserved(handle);
+}
+
 static inline handle_t *ext4_journal_current_handle(void)
 {
 	return journal_current_handle();