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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 */
25
26/*
27 * This file is intended for functions that ought to be common between user
28 * land (libzfs) and the kernel. When many common routines need to be shared
29 * then a separate file should to be created.
30 */
31
32#if defined(_KERNEL)
33#include <sys/systm.h>
34#else
35#include <string.h>
36#endif
37
38#include <sys/types.h>
39#include <sys/fs/zfs.h>
40#include <sys/nvpair.h>
41#include "zfs_comutil.h"
42
43/*
44 * Are there allocatable vdevs?
45 */
46boolean_t
47zfs_allocatable_devs(nvlist_t *nv)
48{
49	uint64_t is_log;
50	uint_t c;
51	nvlist_t **child;
52	uint_t children;
53
54	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
55	    &child, &children) != 0) {
56		return (B_FALSE);
57	}
58	for (c = 0; c < children; c++) {
59		is_log = 0;
60		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
61		    &is_log);
62		if (!is_log)
63			return (B_TRUE);
64	}
65	return (B_FALSE);
66}
67
68void
69zpool_get_rewind_policy(nvlist_t *nvl, zpool_rewind_policy_t *zrpp)
70{
71	nvlist_t *policy;
72	nvpair_t *elem;
73	char *nm;
74
75	/* Defaults */
76	zrpp->zrp_request = ZPOOL_NO_REWIND;
77	zrpp->zrp_maxmeta = 0;
78	zrpp->zrp_maxdata = UINT64_MAX;
79	zrpp->zrp_txg = UINT64_MAX;
80
81	if (nvl == NULL)
82		return;
83
84	elem = NULL;
85	while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
86		nm = nvpair_name(elem);
87		if (strcmp(nm, ZPOOL_REWIND_POLICY) == 0) {
88			if (nvpair_value_nvlist(elem, &policy) == 0)
89				zpool_get_rewind_policy(policy, zrpp);
90			return;
91		} else if (strcmp(nm, ZPOOL_REWIND_REQUEST) == 0) {
92			if (nvpair_value_uint32(elem, &zrpp->zrp_request) == 0)
93				if (zrpp->zrp_request & ~ZPOOL_REWIND_POLICIES)
94					zrpp->zrp_request = ZPOOL_NO_REWIND;
95		} else if (strcmp(nm, ZPOOL_REWIND_REQUEST_TXG) == 0) {
96			(void) nvpair_value_uint64(elem, &zrpp->zrp_txg);
97		} else if (strcmp(nm, ZPOOL_REWIND_META_THRESH) == 0) {
98			(void) nvpair_value_uint64(elem, &zrpp->zrp_maxmeta);
99		} else if (strcmp(nm, ZPOOL_REWIND_DATA_THRESH) == 0) {
100			(void) nvpair_value_uint64(elem, &zrpp->zrp_maxdata);
101		}
102	}
103	if (zrpp->zrp_request == 0)
104		zrpp->zrp_request = ZPOOL_NO_REWIND;
105}
106
107typedef struct zfs_version_spa_map {
108	int	version_zpl;
109	int	version_spa;
110} zfs_version_spa_map_t;
111
112/*
113 * Keep this table in monotonically increasing version number order.
114 */
115static zfs_version_spa_map_t zfs_version_table[] = {
116	{ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL},
117	{ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL},
118	{ZPL_VERSION_FUID, SPA_VERSION_FUID},
119	{ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
120	{ZPL_VERSION_SA, SPA_VERSION_SA},
121	{0, 0}
122};
123
124/*
125 * Return the max zpl version for a corresponding spa version
126 * -1 is returned if no mapping exists.
127 */
128int
129zfs_zpl_version_map(int spa_version)
130{
131	int i;
132	int version = -1;
133
134	for (i = 0; zfs_version_table[i].version_spa; i++) {
135		if (spa_version >= zfs_version_table[i].version_spa)
136			version = zfs_version_table[i].version_zpl;
137	}
138
139	return (version);
140}
141
142/*
143 * Return the min spa version for a corresponding spa version
144 * -1 is returned if no mapping exists.
145 */
146int
147zfs_spa_version_map(int zpl_version)
148{
149	int i;
150	int version = -1;
151
152	for (i = 0; zfs_version_table[i].version_zpl; i++) {
153		if (zfs_version_table[i].version_zpl >= zpl_version)
154			return (zfs_version_table[i].version_spa);
155	}
156
157	return (version);
158}
159
160/*
161 * This is the table of legacy internal event names; it should not be modified.
162 * The internal events are now stored in the history log as strings.
163 */
164const char *zfs_history_event_names[ZFS_NUM_LEGACY_HISTORY_EVENTS] = {
165	"invalid event",
166	"pool create",
167	"vdev add",
168	"pool remove",
169	"pool destroy",
170	"pool export",
171	"pool import",
172	"vdev attach",
173	"vdev replace",
174	"vdev detach",
175	"vdev online",
176	"vdev offline",
177	"vdev upgrade",
178	"pool clear",
179	"pool scrub",
180	"pool property set",
181	"create",
182	"clone",
183	"destroy",
184	"destroy_begin_sync",
185	"inherit",
186	"property set",
187	"quota set",
188	"permission update",
189	"permission remove",
190	"permission who remove",
191	"promote",
192	"receive",
193	"rename",
194	"reservation set",
195	"replay_inc_sync",
196	"replay_full_sync",
197	"rollback",
198	"snapshot",
199	"filesystem version upgrade",
200	"refquota set",
201	"refreservation set",
202	"pool scrub done",
203	"user hold",
204	"user release",
205	"pool split",
206};
207