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Illumos #1748: desire support for reguid in zfs

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Reviewed by: George Wilson <gwilson@zfsmail.com>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Alexander Eremin <alexander.eremin@nexenta.com>
Reviewed by: Alexander Stetsenko <ams@nexenta.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/1748

This commit modifies the user to kernel space ioctl ABI.  Extra
care should be taken when updating to ensure both the kernel
modules and utilities are updated.  If only the user space
component is updated both the 'zpool events' command and the
'zpool reguid' command will not work until the kernel modules
are updated.

Ported by:     Martin Matuska <martin@matuska.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #665
This commit is contained in:
Garrett D'Amore
2011-11-11 14:07:54 -08:00
committed by Brian Behlendorf
parent ba9b5428fd
commit 3541dc6d02
15 changed files with 225 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/spa.c
+39 -3
View File
@@ -21,9 +21,8 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2011 by Delphix. All rights reserved.
*/
/*
@@ -571,6 +570,43 @@ spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
}
}
/*
* Change the GUID for the pool. This is done so that we can later
* re-import a pool built from a clone of our own vdevs. We will modify
* the root vdev's guid, our own pool guid, and then mark all of our
* vdevs dirty. Note that we must make sure that all our vdevs are
* online when we do this, or else any vdevs that weren't present
* would be orphaned from our pool. We are also going to issue a
* sysevent to update any watchers.
*/
int
spa_change_guid(spa_t *spa)
{
uint64_t oldguid, newguid;
uint64_t txg;
if (!(spa_mode_global & FWRITE))
return (EROFS);
txg = spa_vdev_enter(spa);
if (spa->spa_root_vdev->vdev_state != VDEV_STATE_HEALTHY)
return (spa_vdev_exit(spa, NULL, txg, ENXIO));
oldguid = spa_guid(spa);
newguid = spa_generate_guid(NULL);
ASSERT3U(oldguid, !=, newguid);
spa->spa_root_vdev->vdev_guid = newguid;
spa->spa_root_vdev->vdev_guid_sum += (newguid - oldguid);
vdev_config_dirty(spa->spa_root_vdev);
spa_event_notify(spa, NULL, FM_EREPORT_ZFS_POOL_REGUID);
return (spa_vdev_exit(spa, NULL, txg, 0));
}
/*
* ==========================================================================
* SPA state manipulation (open/create/destroy/import/export)
@@ -1773,7 +1809,7 @@ spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
spa_guid_exists(pool_guid, 0)) {
error = EEXIST;
} else {
spa->spa_load_guid = pool_guid;
spa->spa_config_guid = pool_guid;
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
&nvl) == 0) {