From: Mike Anderson 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(-) Index: linux-2.6.32/drivers/md/dm.c =================================================================== --- linux-2.6.32.orig/drivers/md/dm.c +++ linux-2.6.32/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_devi 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_kobjec return NULL; if (test_bit(DMF_FREEING, &md->flags) || - test_bit(DMF_DELETING, &md->flags)) + dm_deleting_md(md)) return NULL; dm_get(md); Index: linux-2.6.32/drivers/md/dm.h =================================================================== --- linux-2.6.32.orig/drivers/md/dm.h +++ linux-2.6.32/drivers/md/dm.h @@ -89,6 +89,11 @@ int dm_target_iterate(void (*iter_func)( 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. */