diff options
| author | Ned Bass <[email protected]> | 2015-04-23 12:32:59 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-04-24 15:04:43 -0700 |
| commit | 4eb30c68644c0aacbed9e10d94eff071b2cd76f8 (patch) | |
| tree | 751fecec325462a50cf9739a87d384f757e90b0e /module/zfs/spa.c | |
| parent | 7008109646446a3f9dda36bfbd3a526f4f8810ae (diff) | |
Serialize access to spa->spa_feat_stats nvlist
The function spa_add_feature_stats() manipulates the shared nvlist
spa->spa_feat_stats in an unsafe concurrent manner. Add a mutex to
protect the list.
Signed-off-by: Ned Bass <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #3335
Diffstat (limited to 'module/zfs/spa.c')
| -rw-r--r-- | module/zfs/spa.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/module/zfs/spa.c b/module/zfs/spa.c index 8bee15094..998ec3e54 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -3264,10 +3264,13 @@ spa_feature_stats_from_cache(spa_t *spa, nvlist_t *features) static void spa_add_feature_stats(spa_t *spa, nvlist_t *config) { - nvlist_t *features = spa->spa_feat_stats; + nvlist_t *features; ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + mutex_enter(&spa->spa_feat_stats_lock); + features = spa->spa_feat_stats; + if (features != NULL) { spa_feature_stats_from_cache(spa, features); } else { @@ -3278,6 +3281,8 @@ spa_add_feature_stats(spa_t *spa, nvlist_t *config) VERIFY0(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, features)); + + mutex_exit(&spa->spa_feat_stats_lock); } int |