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Clean ZFS spa config before syncing 

A number of entries that can be present in the spa config shouldn't be saved
to disk so add a method to ensure this is case. Without this if the last
caller to vdev_config_generate requested stats then we can end up in the
cache file.

Also only skip a none writable pool in the cache file generation if its
active. This prevents unavailable pools incorrectly getting removed from
cache file.

Tested by:	delphij
MFC after:	2 weeks
Sponsored by:	Multiplay
This commit is contained in:
Steven Hartland 2015-01-18 23:15:49 +00:00
parent e1600e5058
commit 5eab7e5406
1 changed files with 26 additions and 1 deletions
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27
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c
View File

@ -140,6 +140,26 @@ out:
kobj_close_file(file);
}
static void
spa_config_clean(nvlist_t *nvl)
{
nvlist_t **child;
nvlist_t *nvroot = NULL;
uint_t c, children;
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
&children) == 0) {
for (c = 0; c < children; c++)
spa_config_clean(child[c]);
}
if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0)
spa_config_clean(nvroot);
nvlist_remove(nvl, ZPOOL_CONFIG_VDEV_STATS, DATA_TYPE_UINT64_ARRAY);
nvlist_remove(nvl, ZPOOL_CONFIG_SCAN_STATS, DATA_TYPE_UINT64_ARRAY);
}
static int
spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl)
{
@ -233,6 +253,7 @@ spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent)
*/
nvl = NULL;
while ((spa = spa_next(spa)) != NULL) {
nvlist_t *nvroot = NULL;
/*
* Skip over our own pool if we're about to remove
* ourselves from the spa namespace or any pool that
@ -241,7 +262,8 @@ spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent)
* 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);
@ -260,6 +282,9 @@ spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent)
VERIFY(nvlist_add_nvlist(nvl, spa->spa_name,
spa->spa_config) == 0);
mutex_exit(&spa->spa_props_lock);
if (nvlist_lookup_nvlist(nvl, spa->spa_name, &nvroot) == 0)
spa_config_clean(nvroot);
}
error = spa_config_write(dp, nvl);