diff options
| author |   Mike Anderson <andmike@linux.vnet.ibm.com> | 2009-12-10 23:52:20 +0000 |
|---|---|---|
| committer |   Alasdair G Kergon <agk@redhat.com> | 2009-12-10 23:52:20 +0000 |
| commit | 432a212c0dd0f4ca386cf37c5b740ac9dbda4479 (patch) | |
| tree | 0eb05111e9290856c9e7543e5d12e1e3ee0c8ef3 /drivers/md | |
| parent | dm mpath: flush workqueues before suspend completes (diff) | |
| download | linux-dev-432a212c0dd0f4ca386cf37c5b740ac9dbda4479.tar.xz linux-dev-432a212c0dd0f4ca386cf37c5b740ac9dbda4479.zip | |
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 <andmike@linux.vnet.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 9 | ||||
| -rw-r--r-- | 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 233a2e9156a3..16f759fe04fe 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 4a95e8fa3607..604a5f2a2383 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -89,6 +89,11 @@ 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. */ |