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authorKiyoshi Ueda <k-ueda@ct.jp.nec.com>2006-12-08 02:41:04 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:29:09 -0800
commita3d77d35be6f416a250c528c3ed5c70013a915e8 (patch)
tree6aaecdf78b4da52f8a3b3ded2bd320812e3db6df
parent74859364633963cb660c4fa518adca9ab1ca4229 (diff)
downloadop-kernel-dev-a3d77d35be6f416a250c528c3ed5c70013a915e8.zip
op-kernel-dev-a3d77d35be6f416a250c528c3ed5c70013a915e8.tar.gz
[PATCH] dm: suspend: parameter change
Change the interface of dm_suspend() so that we can pass several options without increasing the number of parameters. The existing 'do_lockfs' integer parameter is replaced by a flag DM_SUSPEND_LOCKFS_FLAG. There is no functional change to the code. Test results: I have tested 'dmsetup suspend' command with/without the '--nolockfs' option and confirmed the do_lockfs value is correctly set. 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>
-rw-r--r--drivers/md/dm-ioctl.c12
-rw-r--r--drivers/md/dm.c3
-rw-r--r--drivers/md/dm.h5
-rw-r--r--include/linux/device-mapper.h2
4 files changed, 14 insertions, 8 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 4510ad8..6d7a3d0 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -765,7 +765,7 @@ out:
static int do_suspend(struct dm_ioctl *param)
{
int r = 0;
- int do_lockfs = 1;
+ unsigned suspend_flags = DM_SUSPEND_LOCKFS_FLAG;
struct mapped_device *md;
md = find_device(param);
@@ -773,10 +773,10 @@ static int do_suspend(struct dm_ioctl *param)
return -ENXIO;
if (param->flags & DM_SKIP_LOCKFS_FLAG)
- do_lockfs = 0;
+ suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG;
if (!dm_suspended(md))
- r = dm_suspend(md, do_lockfs);
+ r = dm_suspend(md, suspend_flags);
if (!r)
r = __dev_status(md, param);
@@ -788,7 +788,7 @@ static int do_suspend(struct dm_ioctl *param)
static int do_resume(struct dm_ioctl *param)
{
int r = 0;
- int do_lockfs = 1;
+ unsigned suspend_flags = DM_SUSPEND_LOCKFS_FLAG;
struct hash_cell *hc;
struct mapped_device *md;
struct dm_table *new_map;
@@ -814,9 +814,9 @@ static int do_resume(struct dm_ioctl *param)
if (new_map) {
/* Suspend if it isn't already suspended */
if (param->flags & DM_SKIP_LOCKFS_FLAG)
- do_lockfs = 0;
+ suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG;
if (!dm_suspended(md))
- dm_suspend(md, do_lockfs);
+ dm_suspend(md, suspend_flags);
r = dm_swap_table(md, new_map);
if (r) {
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index dd50e30..b42e71b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1272,12 +1272,13 @@ static void unlock_fs(struct mapped_device *md)
* dm_bind_table, dm_suspend must be called to flush any in
* flight bios and ensure that any further io gets deferred.
*/
-int dm_suspend(struct mapped_device *md, int do_lockfs)
+int dm_suspend(struct mapped_device *md, unsigned suspend_flags)
{
struct dm_table *map = NULL;
DECLARE_WAITQUEUE(wait, current);
struct bio *def;
int r = -EINVAL;
+ int do_lockfs = suspend_flags & DM_SUSPEND_LOCKFS_FLAG ? 1 : 0;
down(&md->suspend_lock);
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index a48ec5e..81c98d6 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -33,6 +33,11 @@
#define SECTOR_SHIFT 9
/*
+ * Suspend feature flags
+ */
+#define DM_SUSPEND_LOCKFS_FLAG (1 << 0)
+
+/*
* List of devices that a metadevice uses and should open/close.
*/
struct dm_dev {
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 03ef41c..9194ff2 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -173,7 +173,7 @@ void *dm_get_mdptr(struct mapped_device *md);
/*
* A device can still be used while suspended, but I/O is deferred.
*/
-int dm_suspend(struct mapped_device *md, int with_lockfs);
+int dm_suspend(struct mapped_device *md, unsigned suspend_flags);
int dm_resume(struct mapped_device *md);
/*
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