[PATCH] device-mapper ioctl: add skip lock_fs flag
Add ioctl DM_SKIP_LOCKFS_FLAG for userspace to request that lock_fs is
bypassed when suspending a device.
There's no change to the behaviour of existing code that doesn't know about
the new flag.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/dm-ioctl.h b/include/linux/dm-ioctl.h
index f5eb6b6..fa75ba0 100644
--- a/include/linux/dm-ioctl.h
+++ b/include/linux/dm-ioctl.h
@@ -272,9 +272,9 @@
#define DM_TARGET_MSG _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
-#define DM_VERSION_MINOR 4
+#define DM_VERSION_MINOR 5
#define DM_VERSION_PATCHLEVEL 0
-#define DM_VERSION_EXTRA "-ioctl (2005-01-12)"
+#define DM_VERSION_EXTRA "-ioctl (2005-10-04)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */
@@ -301,8 +301,13 @@
#define DM_BUFFER_FULL_FLAG (1 << 8) /* Out */
/*
- * Set this to improve performance when you aren't going to use open_count
+ * Set this to improve performance when you aren't going to use open_count.
*/
#define DM_SKIP_BDGET_FLAG (1 << 9) /* In */
+/*
+ * Set this to avoid attempting to freeze any filesystem when suspending.
+ */
+#define DM_SKIP_LOCKFS_FLAG (1 << 10) /* In */
+
#endif /* _LINUX_DM_IOCTL_H */