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
......@@ -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;
......
......@@ -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.
......
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