From e923bcd16c33d6a83712b08c7854f0c3edb62172 Mon Sep 17 00:00:00 2001 From: George Amanakis Date: Tue, 19 Sep 2023 02:06:35 +0200 Subject: [PATCH] Update the MOS directory on spa_upgrade_errlog() spa_upgrade_errlog() does not update the MOS directory when the head_errlog feature is enabled. In this case if spa_errlog_sync() is not called, the MOS dir references the old errlog_last and errlog_sync objects. Thus when doing a scrub a panic will occur: Call Trace: dump_stack+0x6d/0x8b panic+0x101/0x2e3 spl_panic+0xcf/0x102 [spl] delete_errlog+0x124/0x130 [zfs] spa_errlog_sync+0x256/0x260 [zfs] spa_sync_iterate_to_convergence+0xe5/0x250 [zfs] spa_sync+0x2f7/0x670 [zfs] txg_sync_thread+0x22d/0x2d0 [zfs] thread_generic_wrapper+0x83/0xa0 [spl] kthread+0x104/0x140 ret_from_fork+0x1f/0x40 Fix this by updating the related MOS directory objects in spa_upgrade_errlog(). Reviewed-by: Mark Maybee Reviewed-by: Brian Behlendorf Signed-off-by: George Amanakis Closes #15279 Closes #15277 --- module/zfs/spa_errlog.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/module/zfs/spa_errlog.c b/module/zfs/spa_errlog.c index 2e5c22c114..5dd08f597f 100644 --- a/module/zfs/spa_errlog.c +++ b/module/zfs/spa_errlog.c @@ -930,12 +930,21 @@ spa_upgrade_errlog(spa_t *spa, dmu_tx_t *tx) if (spa->spa_errlog_last != 0) { sync_upgrade_errlog(spa, spa->spa_errlog_last, &newobj, tx); spa->spa_errlog_last = newobj; + + (void) zap_update(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, + sizeof (uint64_t), 1, &spa->spa_errlog_last, tx); } if (spa->spa_errlog_scrub != 0) { sync_upgrade_errlog(spa, spa->spa_errlog_scrub, &newobj, tx); spa->spa_errlog_scrub = newobj; + + (void) zap_update(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, + sizeof (uint64_t), 1, &spa->spa_errlog_scrub, tx); } + mutex_exit(&spa->spa_errlog_lock); }