On 31/12/2014 02:12, Xin Li wrote:
On 12/23/14 01:31, Steven Hartland wrote:
Author: smh
Date: Tue Dec 23 09:31:24 2014
New Revision: 276123
URL: https://svnweb.freebsd.org/changeset/base/276123
Log:
Always sync the global ZFS config cache to reflect the new mosconfig
This fixes out of date zpool.cache for root pools, which can cause issues
such as confusion of zdb etc.
MFC after: 1 month
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c Tue Dec
23 08:51:30 2014 (r276122)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c Tue Dec
23 09:31:24 2014 (r276123)
@@ -536,8 +536,7 @@ spa_config_update(spa_t *spa, int what)
/*
* Update the global config cache to reflect the new mosconfig.
*/
- if (!spa->spa_is_root)
- spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL);
+ spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL);
if (what == SPA_CONFIG_UPDATE_POOL)
spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS);
It seems like that this change breaks systems where not all pools are
available (e.g. some of pools are encrypted) at boot time, by removing
all these pools from the cache file.
As a result, on the next boot, these pools would not be imported even
when the devices are available (geli attached), and reverting this
change would restore the system to its previous behavior.
Perhaps it have exposed an existing bug?
I've managed to reproduce this here with mdX backed test pools, and
looking into it this is due to spa_config_sync:
/*
* Skip over our own pool if we're about to remove
* ourselves from the spa namespace or any pool
that
* is readonly. Since we cannot guarantee that a
* readonly pool would successfully import upon
reboot,
* we don't allow them to be written to the
cache file.
*/
if ((spa == target && removing) ||
!spa_writeable(spa)) {
continue;
}
This was added by upstream:
https://github.com/illumos/illumos-gate/commit/fb02ae025247e3b662600e5a9c1b4c33ecab7d72
https://www.illumos.org/issues/3639
It seems the desired behavior was to exclude read only pools, to prevent
them being mounted writable on reboot, but the check is too wide and
also excludes unavailable pools too.
The attached patch corrects the test to only check writable on active
pools so I believe should fix the issue your seeing.
If you can test it and lmk that would be great.
Regards
Steve
Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c (revision
276123)
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c (working copy)
@@ -241,7 +241,8 @@ spa_config_sync(spa_t *target, boolean_t removing,
* we don't allow them to be written to the cache file.
*/
if ((spa == target && removing) ||
- !spa_writeable(spa))
+ (spa_state(spa) == POOL_STATE_ACTIVE &&
+ !spa_writeable(spa)))
continue;
mutex_enter(&spa->spa_props_lock);
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