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Skip spacemaps reading in case of pool readonly import

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The only zdb utility require to read metaslab-related data during
read-only pool import because of spacemaps validation. Add global
variable which will allow zdb read spacemaps in case of readonly
import mode.

Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Fedor Uporov <fuporov.vstack@gmail.com>
Closes #9095
Closes #12687
This commit is contained in:
Brian Behlendorf
2022-04-28 16:47:12 -07:00
committed by GitHub
parent c0ff5f1560
commit ce8d41ef75
5 changed files with 24 additions and 2 deletions
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module/zfs/spa.c
+7
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@@ -180,6 +180,12 @@ boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */
*/
boolean_t spa_load_verify_dryrun = B_FALSE;
/*
* Allow read spacemaps in case of readonly import (spa_mode == SPA_MODE_READ).
* This is used by zdb for spacemaps verification.
*/
boolean_t spa_mode_readable_spacemaps = B_FALSE;
/*
* This (illegal) pool name is used when temporarily importing a spa_t in order
* to get the vdev stats associated with the imported devices.
@@ -1241,6 +1247,7 @@ spa_activate(spa_t *spa, spa_mode_t mode)
spa->spa_state = POOL_STATE_ACTIVE;
spa->spa_mode = mode;
spa->spa_read_spacemaps = spa_mode_readable_spacemaps;
spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);