1 /*- 2 * Copyright (c) 2016 Andriy Gapon <avg@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/types.h> 30 #include <errno.h> 31 #include <limits.h> 32 #include <inttypes.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <kenv.h> 37 38 #include <libzfs.h> 39 40 /* Keep in sync with zfsboot.c. */ 41 #define MAX_COMMAND_LEN 512 42 43 int main(int argc, const char * const *argv) 44 { 45 char buf[32]; 46 libzfs_handle_t *hdl; 47 uint64_t pool_guid; 48 uint64_t vdev_guid; 49 int zfs_fd; 50 int len; 51 52 if (argc != 2) { 53 fprintf(stderr, "usage: zfsbootcfg <boot.config(5) options>\n"); 54 return (1); 55 } 56 57 len = strlen(argv[1]); 58 if (len >= MAX_COMMAND_LEN) { 59 fprintf(stderr, "options string is too long\n"); 60 return (1); 61 } 62 63 if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) { 64 perror("can't get vfs.zfs.boot.primary_pool"); 65 return (1); 66 } 67 pool_guid = strtoumax(buf, NULL, 10); 68 if (pool_guid == 0) { 69 perror("can't parse vfs.zfs.boot.primary_pool"); 70 return (1); 71 } 72 73 if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) { 74 perror("can't get vfs.zfs.boot.primary_vdev"); 75 return (1); 76 } 77 vdev_guid = strtoumax(buf, NULL, 10); 78 if (vdev_guid == 0) { 79 perror("can't parse vfs.zfs.boot.primary_vdev"); 80 return (1); 81 } 82 83 if ((hdl = libzfs_init()) == NULL) { 84 (void) fprintf(stderr, "internal error: failed to " 85 "initialize ZFS library\n"); 86 return (1); 87 } 88 89 if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) { 90 perror("ZFS_IOC_NEXTBOOT failed"); 91 libzfs_fini(hdl); 92 return (1); 93 } 94 95 libzfs_fini(hdl); 96 printf("zfs next boot options are successfully written\n"); 97 return (0); 98 } 99