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authorJoseph Qi <joseph.qi@huawei.com>2015-02-16 16:00:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-16 17:56:05 -0800
commit160cc266639d4213c15c103074561c1b44ffe691 (patch)
tree5994c8a38cb2f52b7cad048a3827aac9015fe28f /fs/ocfs2/ocfs2_fs.h
parent4813962beef7586f890a645a1bda77691da4b74a (diff)
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/ocfs2_fs.h')
-rw-r--r--fs/ocfs2/ocfs2_fs.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index cf4fa43af78e..20e37a3ed26f 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -105,7 +105,8 @@
| OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)
#define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \
| OCFS2_FEATURE_RO_COMPAT_USRQUOTA \
- | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
+ | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA \
+ | OCFS2_FEATURE_RO_COMPAT_APPEND_DIO)
/*
* Heartbeat-only devices are missing journals and other files. The
@@ -199,6 +200,11 @@
#define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002
#define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004
+/*
+ * Append Direct IO support
+ */
+#define OCFS2_FEATURE_RO_COMPAT_APPEND_DIO 0x0008
+
/* The byte offset of the first backup block will be 1G.
* The following will be 4G, 16G, 64G, 256G and 1T.
*/