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| author | Zheng Liu <wenqing.lz@taobao.com> | 2013-01-28 14:21:37 (GMT) |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-01-28 14:21:37 (GMT) |
| commit | 8bad6fc813a3a5300f51369c39d315679fd88c72 (patch) | |
| tree | c455b1f18cc19627a9ab1055d57b72042aeae0a0 /fs/ext4/inode.c | |
| parent | 03dafb5f59bd31b3f590329e95434203f0ca6661 (diff) | |
| download | linux-8bad6fc813a3a5300f51369c39d315679fd88c72.tar.xz | |
ext4: add punching hole support for non-extent-mapped files
This patch add supports for indirect file support punching hole. It
is almost the same as ext4_ext_punch_hole. First, we invalidate all
pages between this hole, and then we try to deallocate all blocks of
this hole.
A recursive function is used to handle deallocation of blocks. In
this function, it iterates over the entries in inode's i_blocks or
indirect blocks, and try to free the block for each one of them.
After applying this patch, xfstest #255 will not pass w/o extent because
indirect-based file doesn't support unwritten extents.
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5abf89c..80683bf 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3557,10 +3557,8 @@ int ext4_punch_hole(struct file *file, loff_t offset, loff_t length) if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; - if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { - /* TODO: Add support for non extent hole punching */ - return -EOPNOTSUPP; - } + if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) + return ext4_ind_punch_hole(file, offset, length); if (EXT4_SB(inode->i_sb)->s_cluster_ratio > 1) { /* TODO: Add support for bigalloc file systems */ |