diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-30 17:58:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-11 16:29:21 +0200 |
| commit | 42dc2a7bb72ed376ccfe8b8f49187a00f893c53f (patch) | |
| tree | 7cc9b3eb234218c4a0de0e66d8e6fa862aad6b80 /fs/f2fs | |
| parent | a2c7493c7f31c0e4d1dede9a179f853484f7dd1d (diff) | |
f2fs: truncate preallocated blocks in error case
commit dc7a10ddee0c56c6d891dd18de5c4ee9869545e0 upstream.
If write is failed, we must deallocate the blocks that we couldn't write.
Cc: stable@vger.kernel.org
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 29c5f799890c..72c6a9e9a9b4 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2694,11 +2694,16 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) inode_lock(inode); ret = generic_write_checks(iocb, from); if (ret > 0) { + bool preallocated = false; + size_t target_size = 0; int err; if (iov_iter_fault_in_readable(from, iov_iter_count(from))) set_inode_flag(inode, FI_NO_PREALLOC); + preallocated = true; + target_size = iocb->ki_pos + iov_iter_count(from); + err = f2fs_preallocate_blocks(iocb, from); if (err) { clear_inode_flag(inode, FI_NO_PREALLOC); @@ -2710,6 +2715,10 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) blk_finish_plug(&plug); clear_inode_flag(inode, FI_NO_PREALLOC); + /* if we couldn't write data, we should deallocate blocks. */ + if (preallocated && i_size_read(inode) < target_size) + f2fs_truncate(inode); + if (ret > 0) f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret); } |