diff options
Diffstat (limited to 'module/zfs/spa.c')
| -rw-r--r-- | module/zfs/spa.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/module/zfs/spa.c b/module/zfs/spa.c index 3264bfb10054..c2f914e11c09 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -25,6 +25,7 @@ * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. + * Copyright 2013 Saso Kiselkov. All rights reserved. * Copyright (c) 2016 Actifio, Inc. All rights reserved. */ @@ -2675,6 +2676,19 @@ spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); } + /* Grab the checksum salt from the MOS. */ + error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, + DMU_POOL_CHECKSUM_SALT, 1, + sizeof (spa->spa_cksum_salt.zcs_bytes), + spa->spa_cksum_salt.zcs_bytes); + if (error == ENOENT) { + /* Generate a new salt for subsequent use */ + (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, + sizeof (spa->spa_cksum_salt.zcs_bytes)); + } else if (error != 0) { + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + } + if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); @@ -3930,6 +3944,12 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, spa_history_create_obj(spa, tx); /* + * Generate some random noise for salted checksums to operate on. + */ + (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, + sizeof (spa->spa_cksum_salt.zcs_bytes)); + + /* * Set pool properties. */ spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); @@ -6406,6 +6426,20 @@ spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) if (lz4_en && !lz4_ac) spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); } + + /* + * If we haven't written the salt, do so now. Note that the + * feature may not be activated yet, but that's fine since + * the presence of this ZAP entry is backwards compatible. + */ + if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, + DMU_POOL_CHECKSUM_SALT) == ENOENT) { + VERIFY0(zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1, + sizeof (spa->spa_cksum_salt.zcs_bytes), + spa->spa_cksum_salt.zcs_bytes, tx)); + } + rrw_exit(&dp->dp_config_rwlock, FTAG); } |