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authorMike Anderson <andmike@linux.vnet.ibm.com>2009-12-10 23:52:20 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-12-10 23:52:20 +0000
commit432a212c0dd0f4ca386cf37c5b740ac9dbda4479 (patch)
tree0eb05111e9290856c9e7543e5d12e1e3ee0c8ef3
parent6df400ab64c68fc4072a13019fc20fd7e3d51303 (diff)
downloadop-kernel-dev-432a212c0dd0f4ca386cf37c5b740ac9dbda4479.zip
op-kernel-dev-432a212c0dd0f4ca386cf37c5b740ac9dbda4479.tar.gz
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>
-rw-r--r--drivers/md/dm.c9
-rw-r--r--drivers/md/dm.h5
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 233a2e9..16f759fe 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 4a95e8f..604a5f2 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.
*/
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