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authorTheodore Ts'o <tytso@mit.edu>2009-05-14 00:58:52 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-05-14 00:58:52 -0400
commitc21770573319922e3f3fcb331cfaa290c49f1c81 (patch)
treeee21ebb2d73d4d3b19d7e391e7accf00704371d9 /fs/ext4/ext4.h
parent12b7ac176831df1aa58a787e67c3e5d698b30163 (diff)
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ext4: Define a new set of flags for ext4_get_blocks()
The functions ext4_get_blocks(), ext4_ext_get_blocks(), and ext4_ind_get_blocks() used an ad-hoc set of integer variables used as boolean flags passed in as arguments. Use a single flags parameter and a setandard set of bitfield flags instead. This saves space on the call stack, and it also makes the code a bit more understandable. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h22
1 files changed, 15 insertions, 7 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 5dc8368..17feb4a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -314,10 +314,20 @@ struct ext4_new_group_data {
};
/*
- * Following is used by preallocation code to tell get_blocks() that we
- * want uninitialzed extents.
+ * Flags used by ext4_get_blocks()
*/
-#define EXT4_CREATE_UNINITIALIZED_EXT 2
+ /* Allocate any needed blocks and/or convert an unitialized
+ extent to be an initialized ext4 */
+#define EXT4_GET_BLOCKS_CREATE 1
+ /* Request the creation of an unitialized extent */
+#define EXT4_GET_BLOCKS_UNINIT_EXT 2
+#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\
+ EXT4_GET_BLOCKS_CREATE)
+ /* Update the ext4_inode_info i_disksize field */
+#define EXT4_GET_BLOCKS_EXTEND_DISKSIZE 4
+ /* Caller is from the delayed allocation writeout path,
+ so the filesystem blocks have already been accounted for */
+#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 8
/*
* ioctl commands
@@ -1610,8 +1620,7 @@ extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
int chunk);
extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, unsigned int max_blocks,
- struct buffer_head *bh_result,
- int create, int extend_disksize);
+ struct buffer_head *bh_result, int flags);
extern void ext4_ext_truncate(struct inode *);
extern void ext4_ext_init(struct super_block *);
extern void ext4_ext_release(struct super_block *);
@@ -1619,8 +1628,7 @@ extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
loff_t len);
extern int ext4_get_blocks(handle_t *handle, struct inode *inode,
sector_t block, unsigned int max_blocks,
- struct buffer_head *bh, int create,
- int extend_disksize, int flag);
+ struct buffer_head *bh, int flags);
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);