Commit d229a958 authored by David Teigland's avatar David Teigland Committed by Linus Torvalds
Browse files

[PATCH] device-mapper: add dm_get_md 



Add dm_get_dev() to get a mapped device given its dev_t.

Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 637842cf

drivers/md/dm.c

+10 −0
Original line number Diff line number Diff line
@@ -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;

drivers/md/dm.h

+1 −0
Original line number Diff line number Diff line
@@ -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.