ext4: reuse path object in ext4_move_extents()
Reuse the path object in ext4_move_extents() so we don't unnecessarily free and reallocate it. Also clean up the get_ext_path() wrapper so that it has the same semantics of freeing the path object on error as ext4_ext_find_extent(). Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
parent
ee4bd0d963
commit
3bdf14b4d7
|
@ -32,20 +32,21 @@
|
||||||
*/
|
*/
|
||||||
static inline int
|
static inline int
|
||||||
get_ext_path(struct inode *inode, ext4_lblk_t lblock,
|
get_ext_path(struct inode *inode, ext4_lblk_t lblock,
|
||||||
struct ext4_ext_path **orig_path)
|
struct ext4_ext_path **ppath)
|
||||||
{
|
{
|
||||||
int ret = 0;
|
|
||||||
struct ext4_ext_path *path;
|
struct ext4_ext_path *path;
|
||||||
|
|
||||||
path = ext4_ext_find_extent(inode, lblock, orig_path, EXT4_EX_NOCACHE);
|
path = ext4_ext_find_extent(inode, lblock, ppath, EXT4_EX_NOCACHE);
|
||||||
if (IS_ERR(path))
|
if (IS_ERR(path))
|
||||||
ret = PTR_ERR(path);
|
return PTR_ERR(path);
|
||||||
else if (path[ext_depth(inode)].p_ext == NULL)
|
if (path[ext_depth(inode)].p_ext == NULL) {
|
||||||
ret = -ENODATA;
|
ext4_ext_drop_refs(path);
|
||||||
else
|
kfree(path);
|
||||||
*orig_path = path;
|
*ppath = NULL;
|
||||||
|
return -ENODATA;
|
||||||
return ret;
|
}
|
||||||
|
*ppath = path;
|
||||||
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -667,7 +668,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
|
||||||
}
|
}
|
||||||
d_start += next_blk - o_start;
|
d_start += next_blk - o_start;
|
||||||
o_start = next_blk;
|
o_start = next_blk;
|
||||||
goto repeat;
|
continue;
|
||||||
/* Check hole after the start pos */
|
/* Check hole after the start pos */
|
||||||
} else if (cur_blk > o_start) {
|
} else if (cur_blk > o_start) {
|
||||||
/* Skip hole */
|
/* Skip hole */
|
||||||
|
@ -708,10 +709,6 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
|
||||||
break;
|
break;
|
||||||
o_start += cur_len;
|
o_start += cur_len;
|
||||||
d_start += cur_len;
|
d_start += cur_len;
|
||||||
repeat:
|
|
||||||
ext4_ext_drop_refs(path);
|
|
||||||
kfree(path);
|
|
||||||
path = NULL;
|
|
||||||
}
|
}
|
||||||
*moved_len = o_start - orig_blk;
|
*moved_len = o_start - orig_blk;
|
||||||
if (*moved_len > len)
|
if (*moved_len > len)
|
||||||
|
|
Loading…
Reference in New Issue