2 * Copyright (c) 2016 Andriy Gapon <avg@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/types.h>
40 /* Keep in sync with zfsboot.c. */
41 #define MAX_COMMAND_LEN 512
44 install_bootonce(libzfs_handle_t *hdl, uint64_t pool_guid, nvlist_t *nv,
45 const char * const data)
52 (void) nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, &child,
55 for (int c = 0; c < children; c++) {
56 rv = install_bootonce(hdl, pool_guid, child[c], data);
62 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) {
63 perror("can't get vdev guid");
66 if (zpool_nextboot(hdl, pool_guid, guid, data) != 0) {
67 perror("ZFS_IOC_NEXTBOOT failed");
73 int main(int argc, const char * const *argv)
77 zpool_handle_t *zphdl;
79 nvlist_t *nv, *config;
84 fprintf(stderr, "usage: zfsbootcfg <boot.config(5) options>\n");
88 len = strlen(argv[1]);
89 if (len >= MAX_COMMAND_LEN) {
90 fprintf(stderr, "options string is too long\n");
94 if (kenv(KENV_GET, "vfs.root.mountfrom", buf, sizeof(buf)) <= 0) {
95 perror("can't get vfs.root.mountfrom");
99 if (strncmp(buf, "zfs:", 4) == 0) {
100 name = strchr(buf + 4, '/');
105 perror("not a zfs root");
109 if ((hdl = libzfs_init()) == NULL) {
110 (void) fprintf(stderr, "internal error: failed to "
111 "initialize ZFS library\n");
115 zphdl = zpool_open(hdl, name);
117 perror("can't open pool");
122 pool_guid = zpool_get_prop_int(zphdl, ZPOOL_PROP_GUID, NULL);
124 config = zpool_get_config(zphdl, NULL);
125 if (config == NULL) {
126 perror("can't get pool config");
132 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) != 0) {
133 perror("failed to get vdev tree");
139 rv = install_bootonce(hdl, pool_guid, nv, argv[1]);
144 printf("zfs next boot options are successfully written\n");