diff options
| author | Namjae Jeon <namjae.jeon@samsung.com> | 2013-11-05 16:57:32 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-11-05 16:57:32 +1100 |
| commit | 63bb2c6900b8d3911cc6e7d428b6745f897b4649 (patch) | |
| tree | f6d11fdc9c04c9d15607d86dfc27052753f05c6c /fs | |
| parent | d45d5c0fdbb6f1bd99e8634d448d139521cc18c1 (diff) | |
fat: fallback to buffered write in case of fallocatded region on direct IO
For normal cases of direct IO write, trying to seek to location greater
than file size, makes it fall back to buffered write to fill that region.
Similarly, in case for write in Fallocated region, make it fall to
buffered write.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fat/inode.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 5ee94238c5dd..0103e7fa00cd 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -218,6 +218,14 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb, loff_t size = offset + iov_length(iov, nr_segs); if (MSDOS_I(inode)->mmu_private < size) return 0; + + /* + * In case of writing in fallocated region, return 0 and + * fallback to buffered write. + */ + if (MSDOS_I(inode)->i_disksize > + round_up(i_size_read(inode), inode->i_sb->s_blocksize)) + return 0; } /* |