From 432a212c0dd0f4ca386cf37c5b740ac9dbda4479 Mon Sep 17 00:00:00 2001 From: Mike Anderson Date: Thu, 10 Dec 2009 23:52:20 +0000 Subject: dm: add dm_deleting_md function Add dm_deleting_md to check whether or not a given mapped device is currently being deleted. Signed-off-by: Mike Anderson Signed-off-by: Alasdair G Kergon --- drivers/md/dm.c | 9 +++++++-- drivers/md/dm.h | 5 +++++ 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 233a2e9156a..16f759fe04f 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -329,6 +329,11 @@ static void __exit dm_exit(void) /* * Block device functions */ +int dm_deleting_md(struct mapped_device *md) +{ + return test_bit(DMF_DELETING, &md->flags); +} + static int dm_blk_open(struct block_device *bdev, fmode_t mode) { struct mapped_device *md; @@ -340,7 +345,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode) goto out; if (test_bit(DMF_FREEING, &md->flags) || - test_bit(DMF_DELETING, &md->flags)) { + dm_deleting_md(md)) { md = NULL; goto out; } @@ -2659,7 +2664,7 @@ struct mapped_device *dm_get_from_kobject(struct kobject *kobj) return NULL; if (test_bit(DMF_FREEING, &md->flags) || - test_bit(DMF_DELETING, &md->flags)) + dm_deleting_md(md)) return NULL; dm_get(md); diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 4a95e8fa360..604a5f2a238 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -88,6 +88,11 @@ int dm_target_iterate(void (*iter_func)(struct target_type *tt, int dm_split_args(int *argc, char ***argvp, char *input); +/* + * Is this mapped_device being deleted? + */ +int dm_deleting_md(struct mapped_device *md); + /* * The device-mapper can be driven through one of two interfaces; * ioctl or filesystem, depending which patch you have applied. -- cgit v1.2.3-70-g09d2