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Serialize access to spa->spa_feat_stats nvlist

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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 <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3335
This commit is contained in:
Ned Bass
2015-04-23 12:32:59 -07:00
committed by Brian Behlendorf
parent 7008109646
commit 4eb30c6864
3 changed files with 9 additions and 1 deletions
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module/zfs/spa_misc.c
+2
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@@ -531,6 +531,7 @@ spa_add(const char *name, nvlist_t *config, const char *altroot)
mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&spa->spa_feat_stats_lock, NULL, MUTEX_DEFAULT, NULL);
cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL);
cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL);
@@ -668,6 +669,7 @@ spa_remove(spa_t *spa)
mutex_destroy(&spa->spa_scrub_lock);
mutex_destroy(&spa->spa_suspend_lock);
mutex_destroy(&spa->spa_vdev_top_lock);
mutex_destroy(&spa->spa_feat_stats_lock);
kmem_free(spa, sizeof (spa_t));
}