* [PATCH 3/4] Add dm_snap_origin function
@ 2010-03-15 6:01 Mikulas Patocka
2010-03-15 14:20 ` Mike Snitzer
0 siblings, 1 reply; 2+ messages in thread
From: Mikulas Patocka @ 2010-03-15 6:01 UTC (permalink / raw)
To: dm-devel; +Cc: Alasdair G Kergon
Add dm_snap_origin function
Add function dm_snap_origin, it will be used for checking chunk size against
origin sector size.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
---
drivers/md/dm-exception-store.h | 3 ++-
drivers/md/dm-snap.c | 6 ++++++
2 files changed, 8 insertions(+), 1 deletion(-)
Index: linux-2.6.34-rc1-devel/drivers/md/dm-exception-store.h
===================================================================
--- linux-2.6.34-rc1-devel.orig/drivers/md/dm-exception-store.h 2010-03-12 14:41:37.000000000 +0100
+++ linux-2.6.34-rc1-devel/drivers/md/dm-exception-store.h 2010-03-12 14:42:11.000000000 +0100
@@ -126,8 +126,9 @@ struct dm_exception_store {
};
/*
- * Obtain the cow device used by a given snapshot.
+ * Obtain the origin and cow device used by a given snapshot.
*/
+struct dm_dev *dm_snap_origin(struct dm_snapshot *snap);
struct dm_dev *dm_snap_cow(struct dm_snapshot *snap);
/*
Index: linux-2.6.34-rc1-devel/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.34-rc1-devel.orig/drivers/md/dm-snap.c 2010-03-12 14:41:20.000000000 +0100
+++ linux-2.6.34-rc1-devel/drivers/md/dm-snap.c 2010-03-12 14:42:37.000000000 +0100
@@ -148,6 +148,12 @@ struct dm_snapshot {
#define RUNNING_MERGE 0
#define SHUTDOWN_MERGE 1
+struct dm_dev *dm_snap_origin(struct dm_snapshot *s)
+{
+ return s->origin;
+}
+EXPORT_SYMBOL(dm_snap_origin);
+
struct dm_dev *dm_snap_cow(struct dm_snapshot *s)
{
return s->cow;
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH 3/4] Add dm_snap_origin function
2010-03-15 6:01 [PATCH 3/4] Add dm_snap_origin function Mikulas Patocka
@ 2010-03-15 14:20 ` Mike Snitzer
0 siblings, 0 replies; 2+ messages in thread
From: Mike Snitzer @ 2010-03-15 14:20 UTC (permalink / raw)
To: device-mapper development; +Cc: Alasdair G Kergon
On Mon, Mar 15 2010 at 2:01am -0400,
Mikulas Patocka <mpatocka@redhat.com> wrote:
> Add dm_snap_origin function
>
> Add function dm_snap_origin, it will be used for checking chunk size against
> origin sector size.
>
> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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