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| author | Theodore Ts'o <tytso@mit.edu> | 2014-09-01 14:42:09 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-09-01 14:42:09 -0400 |
| commit | 3bdf14b4d7a3a7416577e9f9f421dbf29b5b6747 (patch) | |
| tree | ee40c6911acc6ba9a52af237befa4c9cf926611e /fs/ext4/move_extent.c | |
| parent | ee4bd0d963b75cbad9bfb59b547146671c7a655a (diff) | |
| download | linux-3bdf14b4d7a3a7416577e9f9f421dbf29b5b6747.tar.bz2 | |
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>
Diffstat (limited to 'fs/ext4/move_extent.c')
| -rw-r--r-- | fs/ext4/move_extent.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index a34c0760276c..7bf970dd61f5 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -32,20 +32,21 @@ */ static inline int 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; - 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)) - ret = PTR_ERR(path); - else if (path[ext_depth(inode)].p_ext == NULL) - ret = -ENODATA; - else - *orig_path = path; - - return ret; + return PTR_ERR(path); + if (path[ext_depth(inode)].p_ext == NULL) { + ext4_ext_drop_refs(path); + kfree(path); + *ppath = NULL; + return -ENODATA; + } + *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; o_start = next_blk; - goto repeat; + continue; /* Check hole after the start pos */ } else if (cur_blk > o_start) { /* Skip hole */ @@ -708,10 +709,6 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, break; o_start += cur_len; d_start += cur_len; - repeat: - ext4_ext_drop_refs(path); - kfree(path); - path = NULL; } *moved_len = o_start - orig_blk; if (*moved_len > len) |