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[2.2] Update the MOS directory on spa_upgrade_errlog() #15280

Merged
merged 1 commit into from
Sep 19, 2023
Merged

[2.2] Update the MOS directory on spa_upgrade_errlog() #15280

merged 1 commit into from
Sep 19, 2023

Commits on Sep 19, 2023

  1. 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 <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: George Amanakis <[email protected]>
Closes openzfs#15279 
Closes openzfs#15277
    @gamanakis
    gamanakis committed Sep 19, 2023
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