diff options
Diffstat (limited to 'module/zfs/zfeature.c')
| -rw-r--r-- | module/zfs/zfeature.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/module/zfs/zfeature.c b/module/zfs/zfeature.c index 4f4785a0c..cdb9d6dce 100644 --- a/module/zfs/zfeature.c +++ b/module/zfs/zfeature.c @@ -369,36 +369,46 @@ spa_feature_enable(spa_t *spa, zfeature_info_t *feature, dmu_tx_t *tx) spa->spa_feat_desc_obj, feature, FEATURE_ACTION_ENABLE, tx)); } -/* - * If the specified feature has not yet been enabled, this function returns - * ENOTSUP; otherwise, this function increments the feature's refcount (or - * returns EOVERFLOW if the refcount cannot be incremented). This function must - * be called from syncing context. - */ void spa_feature_incr(spa_t *spa, zfeature_info_t *feature, dmu_tx_t *tx) { + ASSERT(dmu_tx_is_syncing(tx)); ASSERT3U(spa_version(spa), >=, SPA_VERSION_FEATURES); VERIFY3U(0, ==, feature_do_action(spa->spa_meta_objset, spa->spa_feat_for_read_obj, spa->spa_feat_for_write_obj, spa->spa_feat_desc_obj, feature, FEATURE_ACTION_INCR, tx)); } -/* - * If the specified feature has not yet been enabled, this function returns - * ENOTSUP; otherwise, this function decrements the feature's refcount (or - * returns EOVERFLOW if the refcount is already 0). This function must - * be called from syncing context. - */ void spa_feature_decr(spa_t *spa, zfeature_info_t *feature, dmu_tx_t *tx) { + ASSERT(dmu_tx_is_syncing(tx)); ASSERT3U(spa_version(spa), >=, SPA_VERSION_FEATURES); VERIFY3U(0, ==, feature_do_action(spa->spa_meta_objset, spa->spa_feat_for_read_obj, spa->spa_feat_for_write_obj, spa->spa_feat_desc_obj, feature, FEATURE_ACTION_DECR, tx)); } +/* + * This interface is for debugging only. Normal consumers should use + * spa_feature_is_enabled/spa_feature_is_active. + */ +int +spa_feature_get_refcount(spa_t *spa, zfeature_info_t *feature) +{ + int err; + uint64_t refcount = 0; + + if (spa_version(spa) < SPA_VERSION_FEATURES) + return (B_FALSE); + + err = feature_get_refcount(spa->spa_meta_objset, + spa->spa_feat_for_read_obj, spa->spa_feat_for_write_obj, + feature, &refcount); + ASSERT(err == 0 || err == ENOTSUP); + return (err == 0 ? refcount : 0); +} + boolean_t spa_feature_is_enabled(spa_t *spa, zfeature_info_t *feature) { |