1bd201e70d
Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Matt Ahrens <matt@delphix.com> Reviewed by: Eric Schrock <eric.schrock@delphix.com> Reviewed by: Richard Lowe <richlowe@richlowe.net> Reviewed by: Albert Lee <trisk@nexenta.com> Reviewed by: Dan McDonald <danmcd@nexenta.com> Reviewed by: Garrett D'Amore <garrett@damore.org> Approved by: Eric Schrock <eric.schrock@delphix.com> References: https://www.illumos.org/issues/1948 Ported by: Martin Matuska <martin@matuska.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #685
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2012 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/spa.h>
|
|
#include <sys/vdev_impl.h>
|
|
#include <sys/zio.h>
|
|
#include <sys/fs/zfs.h>
|
|
|
|
/*
|
|
* Virtual device vector for the pool's root vdev.
|
|
*/
|
|
|
|
/*
|
|
* We should be able to tolerate one failure with absolutely no damage
|
|
* to our metadata. Two failures will take out space maps, a bunch of
|
|
* indirect block trees, meta dnodes, dnodes, etc. Probably not a happy
|
|
* place to live. When we get smarter, we can liberalize this policy.
|
|
* e.g. If we haven't lost two consecutive top-level vdevs, then we are
|
|
* probably fine. Adding bean counters during alloc/free can make this
|
|
* future guesswork more accurate.
|
|
*/
|
|
static int
|
|
too_many_errors(vdev_t *vd, int numerrors)
|
|
{
|
|
ASSERT3U(numerrors, <=, vd->vdev_children);
|
|
return (numerrors > 0);
|
|
}
|
|
|
|
static int
|
|
vdev_root_open(vdev_t *vd, uint64_t *asize, uint64_t *max_asize,
|
|
uint64_t *ashift)
|
|
{
|
|
int lasterror = 0;
|
|
int numerrors = 0;
|
|
int c;
|
|
|
|
if (vd->vdev_children == 0) {
|
|
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
|
|
return (EINVAL);
|
|
}
|
|
|
|
vdev_open_children(vd);
|
|
|
|
for (c = 0; c < vd->vdev_children; c++) {
|
|
vdev_t *cvd = vd->vdev_child[c];
|
|
|
|
if (cvd->vdev_open_error && !cvd->vdev_islog) {
|
|
lasterror = cvd->vdev_open_error;
|
|
numerrors++;
|
|
}
|
|
}
|
|
|
|
if (too_many_errors(vd, numerrors)) {
|
|
vd->vdev_stat.vs_aux = VDEV_AUX_NO_REPLICAS;
|
|
return (lasterror);
|
|
}
|
|
|
|
*asize = 0;
|
|
*max_asize = 0;
|
|
*ashift = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vdev_root_close(vdev_t *vd)
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; c < vd->vdev_children; c++)
|
|
vdev_close(vd->vdev_child[c]);
|
|
}
|
|
|
|
static void
|
|
vdev_root_state_change(vdev_t *vd, int faulted, int degraded)
|
|
{
|
|
if (too_many_errors(vd, faulted)) {
|
|
vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
|
|
VDEV_AUX_NO_REPLICAS);
|
|
} else if (degraded) {
|
|
vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
|
|
} else {
|
|
vdev_set_state(vd, B_FALSE, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
|
|
}
|
|
}
|
|
|
|
vdev_ops_t vdev_root_ops = {
|
|
vdev_root_open,
|
|
vdev_root_close,
|
|
vdev_default_asize,
|
|
NULL, /* io_start - not applicable to the root */
|
|
NULL, /* io_done - not applicable to the root */
|
|
vdev_root_state_change,
|
|
NULL,
|
|
NULL,
|
|
VDEV_TYPE_ROOT, /* name of this vdev type */
|
|
B_FALSE /* not a leaf vdev */
|
|
};
|