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| author | Namjae Jeon <namjae.jeon@samsung.com> | 2014-02-23 15:18:59 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-02-23 15:18:59 -0500 |
| commit | 9eb79482a97152930b113b51dff530aba9e28c8e (patch) | |
| tree | f6a7c5c7c3de4cae54c9453d3457a0504e9aa070 /fs/ext4/move_extent.c | |
| parent | a633f5a319cf4116d977e25fea2830dce23a8e74 (diff) | |
| download | linux-9eb79482a97152930b113b51dff530aba9e28c8e.tar.gz linux-9eb79482a97152930b113b51dff530aba9e28c8e.tar.bz2 linux-9eb79482a97152930b113b51dff530aba9e28c8e.zip | |
ext4: Add support FALLOC_FL_COLLAPSE_RANGE for fallocate
This patch implements fallocate's FALLOC_FL_COLLAPSE_RANGE for Ext4.
The semantics of this flag are following:
1) It collapses the range lying between offset and length by removing any data
blocks which are present in this range and than updates all the logical
offsets of extents beyond "offset + len" to nullify the hole created by
removing blocks. In short, it does not leave a hole.
2) It should be used exclusively. No other fallocate flag in combination.
3) Offset and length supplied to fallocate should be fs block size aligned
in case of xfs and ext4.
4) Collaspe range does not work beyond i_size.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Tested-by: Dongsu Park <dongsu.park@profitbricks.com>
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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index f39a88abe32c..58ee7dc87669 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -76,7 +76,7 @@ copy_extent_status(struct ext4_extent *src, struct ext4_extent *dest) * ext4_ext_path structure refers to the last extent, or a negative error * value on failure. */ -static int +int mext_next_extent(struct inode *inode, struct ext4_ext_path *path, struct ext4_extent **extent) { |