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/types.h> 37 #include <sys/diskslice.h> 38 #include <sys/diskmbr.h> 39 #include <sys/stat.h> 40 #include <sys/time.h> 41 #include <sys/syslimits.h> 42 #include <sys/mount.h> 43 #include <sys/sysctl.h> 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <stdarg.h> 48 #include <stddef.h> 49 #include <unistd.h> 50 #include <string.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <uuid.h> 54 #include <err.h> 55 #include <assert.h> 56 #include <ctype.h> 57 #include <mntopts.h> 58 59 #define MOPT_UPDATE { "update", 0, MNT_UPDATE, 0 } 60 #define PLATFORM_LEN 16 61 62 static struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_UPDATE, MOPT_NULL }; 63 64 static void usage(void); 65 66 int 67 main(int ac, char **av) 68 { 69 struct vfsconf vfc; 70 int mount_flags = 0; 71 int error; 72 int ch; 73 int init_flags = 0; 74 char *mountpt, *hostdir; 75 size_t vsize; 76 char platform[PLATFORM_LEN] = {0}; 77 78 mount_flags = 0; 79 80 while ((ch = getopt(ac, av, "o:u")) != -1) { 81 switch(ch) { 82 case 'u': 83 init_flags |= MNT_UPDATE; 84 break; 85 86 case 'o': 87 getmntopts(optarg, mopts, &mount_flags, NULL); 88 break; 89 default: 90 usage(); 91 /* not reached */ 92 } 93 } 94 ac -= optind; 95 av += optind; 96 mount_flags |= init_flags; 97 98 /* 99 * Check we're in a vkernel or abort. 100 */ 101 vsize = PLATFORM_LEN; 102 error = sysctlbyname("hw.platform", &platform, &vsize, NULL,0); 103 if (error) 104 errx(1, "Failed to get hw.platform sysctl"); 105 106 if (strnstr(platform, "vkernel", PLATFORM_LEN) == NULL) 107 errx(1, "dirfs is only available for vkernels."); 108 109 /* 110 * Only the mount point need be specified in update mode. 111 */ 112 if (init_flags & MNT_UPDATE) { 113 if (ac != 1) { 114 usage(); 115 /* not reached */ 116 } 117 mountpt = av[0]; 118 if (mount(vfc.vfc_name, mountpt, mount_flags, NULL)) 119 err(1, "mountpoint %s", mountpt); 120 exit(0); 121 } 122 123 if (ac < 2) { 124 usage(); 125 /* not reached */ 126 } 127 128 hostdir = av[0]; 129 mountpt = av[1]; 130 131 /* 132 * Load the dirfs module if necessary (this bit stolen from 133 * mount_null). 134 */ 135 error = getvfsbyname("dirfs", &vfc); 136 if (error && vfsisloadable("dirfs")) { 137 if (vfsload("dirfs") != 0) 138 err(1, "vfsload(dirfs)"); 139 endvfsent(); 140 error = getvfsbyname("dirfs", &vfc); 141 } 142 if (error) 143 errx(1, "dirfs filesystem is not available"); 144 145 error = mount(vfc.vfc_name, mountpt, mount_flags, hostdir); 146 if (error) 147 err(1, "failed to mount %s on %s", hostdir, mountpt); 148 149 exit (0); 150 } 151 152 static 153 void 154 usage(void) 155 { 156 fprintf(stderr, "usage: mount_dirfs [-u] [-o options] " 157 "hostdir dir\n"); 158 exit(1); 159 } 160