[PATCH] device-mapper ioctl: event on rename
After changing the name of a mapped device, trigger a dm event. (For
userspace multipath tools.)
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 07d44e1..3e327db 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -270,6 +270,7 @@
{
char *new_name, *old_name;
struct hash_cell *hc;
+ struct dm_table *table;
/*
* duplicate new.
@@ -317,6 +318,15 @@
/* rename the device node in devfs */
register_with_devfs(hc);
+ /*
+ * Wake up any dm event waiters.
+ */
+ table = dm_get_table(hc->md);
+ if (table) {
+ dm_table_event(table);
+ dm_table_put(table);
+ }
+
up_write(&_hash_lock);
kfree(old_name);
return 0;