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bcache: fix crash with incomplete cache set

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Change-Id: I6abde52afe917633480caaf4e2518f42a816d886
This commit is contained in:
Slava Pestov 2014-07-11 12:17:41 -07:00 committed by Kent Overstreet
parent d83353b319
commit bf0c55c986
2 changed files with 8 additions and 0 deletions
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4
drivers/md/bcache/bcache.h
View File

@ -477,9 +477,13 @@ struct gc_stat {
* CACHE_SET_STOPPING always gets set first when we're closing down a cache set;
* we'll continue to run normally for awhile with CACHE_SET_STOPPING set (i.e.
* flushing dirty data).
*
* CACHE_SET_RUNNING means all cache devices have been registered and journal
* replay is complete.
*/
#define CACHE_SET_UNREGISTERING 0
#define CACHE_SET_STOPPING 1
#define CACHE_SET_RUNNING 2
struct cache_set {
struct closure cl;

4
drivers/md/bcache/super.c
View File

@ -1284,6 +1284,9 @@ int bch_flash_dev_create(struct cache_set *c, uint64_t size)
if (test_bit(CACHE_SET_STOPPING, &c->flags))
return -EINTR;
if (!test_bit(CACHE_SET_RUNNING, &c->flags))
return -EPERM;
u = uuid_find_empty(c);
if (!u) {
pr_err("Can't create volume, no room for UUID");
@ -1706,6 +1709,7 @@ static void run_cache_set(struct cache_set *c)
flash_devs_run(c);
set_bit(CACHE_SET_RUNNING, &c->flags);
return;
err:
closure_sync(&cl);