From d229a9589ff3b988d3f999cdcfa350f97a372673 Mon Sep 17 00:00:00 2001 From: David Teigland Date: Fri, 6 Jan 2006 00:20:01 -0800 Subject: [PATCH] [PATCH] device-mapper: add dm_get_md Add dm_get_dev() to get a mapped device given its dev_t. Signed-off-by: Alasdair G Kergon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/dm.c | 10 ++++++++++ drivers/md/dm.h | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 27cd234cf68..9e8c1edd89d 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -921,6 +921,16 @@ static struct mapped_device *dm_find_md(dev_t dev) return md; } +struct mapped_device *dm_get_md(dev_t dev) +{ + struct mapped_device *md = dm_find_md(dev); + + if (md) + dm_get(md); + + return md; +} + void *dm_get_mdptr(dev_t dev) { struct mapped_device *md; diff --git a/drivers/md/dm.h b/drivers/md/dm.h index e38c3fc1a1d..ab078a24939 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -58,6 +58,7 @@ int dm_create(struct mapped_device **md); int dm_create_with_minor(unsigned int minor, struct mapped_device **md); void dm_set_mdptr(struct mapped_device *md, void *ptr); void *dm_get_mdptr(dev_t dev); +struct mapped_device *dm_get_md(dev_t dev); /* * Reference counting for md. -- 2.20.1