diff options
author | Joseph Qi <joseph.qi@huawei.com> | 2015-02-17 01:00:15 +0100 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 02:56:05 +0100 |
commit | 160cc266639d4213c15c103074561c1b44ffe691 (patch) | |
tree | 5994c8a38cb2f52b7cad048a3827aac9015fe28f /fs/ocfs2/file.c | |
parent | ocfs2: wait for orphan recovery first once append O_DIRECT write crash (diff) | |
download | linux-160cc266639d4213c15c103074561c1b44ffe691.tar.xz linux-160cc266639d4213c15c103074561c1b44ffe691.zip |
ocfs2: set append dio as a ro compat feature
Intruduce a bit OCFS2_FEATURE_RO_COMPAT_APPEND_DIO and check it in
write flow. If the bit is not set, fall back to the old way.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Weiwei Wang <wangww631@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Xuejiufei <xuejiufei@huawei.com>
Cc: alex chen <alex.chen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r-- | fs/ocfs2/file.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 784f2c72c992..46e0d4e857c7 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2213,6 +2213,15 @@ static int ocfs2_prepare_inode_for_write(struct file *file, } /* + * Fallback to old way if the feature bit is not set. + */ + if (end > i_size_read(inode) && + !ocfs2_supports_append_dio(osb)) { + *direct_io = 0; + break; + } + + /* * We don't fill holes during direct io, so * check for them here. If any are found, the * caller will have to retake some cluster @@ -2220,7 +2229,13 @@ static int ocfs2_prepare_inode_for_write(struct file *file, */ ret = ocfs2_check_range_for_holes(inode, saved_pos, count); if (ret == 1) { - *direct_io = 0; + /* + * Fallback to old way if the feature bit is not set. + * Otherwise try dio first and then complete the rest + * request through buffer io. + */ + if (!ocfs2_supports_append_dio(osb)) + *direct_io = 0; ret = 0; } else if (ret < 0) mlog_errno(ret); |