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[PATCH] device-mapper ioctl: event on rename

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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>
This commit is contained in:
goggin, edward
2006-01-06 00:20:01 -08:00
committed by Linus Torvalds
parent d229a9589f
commit 81f1777a55
1 changed files with 10 additions and 0 deletions
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10
drivers/md/dm-ioctl.c
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@@ -270,6 +270,7 @@ static int dm_hash_rename(const char *old, const char *new)
{ {
char *new_name, *old_name; char *new_name, *old_name;
struct hash_cell *hc; struct hash_cell *hc;
struct dm_table *table;
/* /*
* duplicate new. * duplicate new.
@@ -317,6 +318,15 @@ static int dm_hash_rename(const char *old, const char *new)
/* rename the device node in devfs */ /* rename the device node in devfs */
register_with_devfs(hc); 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); up_write(&_hash_lock);
kfree(old_name); kfree(old_name);
return 0; return 0;