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authorKiyoshi Ueda <k-ueda@ct.jp.nec.com>2006-12-08 02:41:07 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:29:09 -0800
commit81fdb096dbcedcc3b94c7e47b59362b5214891e2 (patch)
treece40376d3c16e3105e73d84b0129ab4bfb06dedf /drivers/md
parentd2a7ad29a810441e9dacbaddcc2f0c6045390008 (diff)
[PATCH] dm: ioctl: add noflush suspend
Provide a dm ioctl option to request noflush suspending. (See next patch for what this is for.) As the interface is extended, the version number is incremented. Other than accepting the new option through the interface, There is no change to existing behaviour. Test results: Confirmed the option is given from user-space correctly. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Cc: dm-devel@redhat.com Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-ioctl.c4
-rw-r--r--drivers/md/dm.h1
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 6d7a3d0c8f8..cd6a184536a 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -774,6 +774,8 @@ static int do_suspend(struct dm_ioctl *param)
if (param->flags & DM_SKIP_LOCKFS_FLAG)
suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG;
+ if (param->flags & DM_NOFLUSH_FLAG)
+ suspend_flags |= DM_SUSPEND_NOFLUSH_FLAG;
if (!dm_suspended(md))
r = dm_suspend(md, suspend_flags);
@@ -815,6 +817,8 @@ static int do_resume(struct dm_ioctl *param)
/* Suspend if it isn't already suspended */
if (param->flags & DM_SKIP_LOCKFS_FLAG)
suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG;
+ if (param->flags & DM_NOFLUSH_FLAG)
+ suspend_flags |= DM_SUSPEND_NOFLUSH_FLAG;
if (!dm_suspended(md))
dm_suspend(md, suspend_flags);
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 293d5ce62a2..c307ca9a4c3 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -47,6 +47,7 @@
* Suspend feature flags
*/
#define DM_SUSPEND_LOCKFS_FLAG (1 << 0)
+#define DM_SUSPEND_NOFLUSH_FLAG (1 << 1)
/*
* List of devices that a metadevice uses and should open/close.