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1 | /* | |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | * Copyright (c) 2013, 2014 by Delphix. All rights reserved. | |
24 | */ | |
25 | ||
26 | #include <sys/zfs_context.h> | |
27 | #include <sys/uberblock_impl.h> | |
28 | #include <sys/vdev_impl.h> | |
29 | ||
30 | int | |
31 | uberblock_verify(uberblock_t *ub) | |
32 | { | |
33 | if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) | |
34 | byteswap_uint64_array(ub, sizeof (uberblock_t)); | |
35 | ||
36 | if (ub->ub_magic != UBERBLOCK_MAGIC) | |
37 | return (SET_ERROR(EINVAL)); | |
38 | ||
39 | return (0); | |
40 | } | |
41 | ||
42 | /* | |
43 | * Update the uberblock and return TRUE if anything changed in this | |
44 | * transaction group. | |
45 | */ | |
46 | boolean_t | |
47 | uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg, uint64_t mmp_delay) | |
48 | { | |
49 | ASSERT(ub->ub_txg < txg); | |
50 | ||
51 | /* | |
52 | * We explicitly do not set ub_version here, so that older versions | |
53 | * continue to be written with the previous uberblock version. | |
54 | */ | |
55 | ub->ub_magic = UBERBLOCK_MAGIC; | |
56 | ub->ub_txg = txg; | |
57 | ub->ub_guid_sum = rvd->vdev_guid_sum; | |
58 | ub->ub_timestamp = gethrestime_sec(); | |
59 | ub->ub_software_version = SPA_VERSION; | |
60 | ub->ub_mmp_magic = MMP_MAGIC; | |
61 | ub->ub_mmp_delay = spa_multihost(rvd->vdev_spa) ? mmp_delay : 0; | |
62 | ub->ub_mmp_seq = 0; | |
63 | ||
64 | return (ub->ub_rootbp.blk_birth == txg); | |
65 | } |