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| author | Zheng Liu <wenqing.lz@taobao.com> | 2013-01-28 09:21:37 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-01-28 09:21:37 -0500 |
| commit | 8bad6fc813a3a5300f51369c39d315679fd88c72 (patch) | |
| tree | c455b1f18cc19627a9ab1055d57b72042aeae0a0 /fs/ext4/ext4.h | |
| parent | 03dafb5f59bd31b3f590329e95434203f0ca6661 (diff) | |
| download | linux-8bad6fc813a3a5300f51369c39d315679fd88c72.tar.gz linux-8bad6fc813a3a5300f51369c39d315679fd88c72.tar.bz2 linux-8bad6fc813a3a5300f51369c39d315679fd88c72.zip | |
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/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 80246237f6d5..ca9294f6b730 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2103,6 +2103,7 @@ extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk); extern void ext4_ind_truncate(struct inode *inode); +extern int ext4_ind_punch_hole(struct file *file, loff_t offset, loff_t length); /* ioctl.c */ extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |