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Commit 432a212c authored by Mike Anderson's avatar Mike Anderson Committed by Alasdair G Kergon
Browse files

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: default avatarMike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 6df400ab

drivers/md/dm.c

+7 −2
Original line number Diff line number Diff line
@@ -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);

drivers/md/dm.h

+5 −0
Original line number Diff line number Diff line
@@ -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.