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| author | Slava Pestov <sp@daterainc.com> | 2014-07-11 23:17:41 +0400 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-08-05 02:23:04 +0400 |
| commit | bf0c55c986540483c34ca640f2eef4c3314388b1 (patch) | |
| tree | 42507e423dd6f73e207329e1264b8101b8057880 /drivers/md | |
| parent | d83353b319d47ef8cce82467da6a25c2d558253f (diff) | |
| download | linux-bf0c55c986540483c34ca640f2eef4c3314388b1.tar.xz | |
bcache: fix crash with incomplete cache set
Change-Id: I6abde52afe917633480caaf4e2518f42a816d886
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/bcache.h | 4 | ||||
| -rw-r--r-- | drivers/md/bcache/super.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index d2ebcf323094..04f7bc28ef83 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -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; diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 29dd1e8ae19f..72fbaf79b0c8 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -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); |