1 /* 2 * Copyright (c) 2013 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Antonio Huete Jimenez <tuxillo@quantumachine.net> 6 * by Matthew Dillon <dillon@dragonflybsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/diskslice.h> 38 #include <sys/diskmbr.h> 39 #include <sys/stat.h> 40 #include <sys/mount.h> 41 #include <sys/sysctl.h> 42 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <stdarg.h> 46 #include <stddef.h> 47 #include <unistd.h> 48 #include <string.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <uuid.h> 52 #include <err.h> 53 #include <assert.h> 54 #include <ctype.h> 55 #include <mntopts.h> 56 57 #define MOPT_UPDATE { "update", 0, MNT_UPDATE, 0 } 58 #define PLATFORM_LEN 16 59 60 static struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_UPDATE, MOPT_NULL }; 61 62 static void usage(void); 63 64 int 65 main(int ac, char **av) 66 { 67 struct vfsconf vfc; 68 int mount_flags = 0; 69 int error; 70 int ch; 71 int init_flags = 0; 72 char *mountpt, *hostdir; 73 size_t vsize; 74 char platform[PLATFORM_LEN] = {0}; 75 76 mount_flags = 0; 77 78 while ((ch = getopt(ac, av, "o:u")) != -1) { 79 switch(ch) { 80 case 'u': 81 init_flags |= MNT_UPDATE; 82 break; 83 84 case 'o': 85 getmntopts(optarg, mopts, &mount_flags, NULL); 86 break; 87 default: 88 usage(); 89 /* not reached */ 90 } 91 } 92 ac -= optind; 93 av += optind; 94 mount_flags |= init_flags; 95 96 /* 97 * Check we're in a vkernel or abort. 98 */ 99 vsize = PLATFORM_LEN; 100 error = sysctlbyname("hw.platform", &platform, &vsize, NULL,0); 101 if (error) 102 errx(1, "Failed to get hw.platform sysctl"); 103 104 if (strnstr(platform, "vkernel", PLATFORM_LEN) == NULL) 105 errx(1, "dirfs is only available for vkernels."); 106 107 /* 108 * Only the mount point need be specified in update mode. 109 */ 110 if (init_flags & MNT_UPDATE) { 111 if (ac != 1) { 112 usage(); 113 /* not reached */ 114 } 115 mountpt = av[0]; 116 if (mount(vfc.vfc_name, mountpt, mount_flags, NULL)) 117 err(1, "mountpoint %s", mountpt); 118 exit(0); 119 } 120 121 if (ac < 2) { 122 usage(); 123 /* not reached */ 124 } 125 126 hostdir = av[0]; 127 mountpt = av[1]; 128 129 /* 130 * Load the dirfs module if necessary (this bit stolen from 131 * mount_null). 132 */ 133 error = getvfsbyname("dirfs", &vfc); 134 if (error && vfsisloadable("dirfs")) { 135 if (vfsload("dirfs") != 0) 136 err(1, "vfsload(dirfs)"); 137 endvfsent(); 138 error = getvfsbyname("dirfs", &vfc); 139 } 140 if (error) 141 errx(1, "dirfs filesystem is not available"); 142 143 error = mount(vfc.vfc_name, mountpt, mount_flags, hostdir); 144 if (error) 145 err(1, "failed to mount %s on %s", hostdir, mountpt); 146 147 exit (0); 148 } 149 150 static 151 void 152 usage(void) 153 { 154 fprintf(stderr, "usage: mount_dirfs [-u] [-o options] " 155 "hostdir dir\n"); 156 exit(1); 157 } 158