1 /* 2 * Copyright (c) 2011-2012 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * by Venkatesh Srinivas <vsrinivas@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 #include <sys/types.h> 36 #include <sys/mount.h> 37 #include <sys/socket.h> 38 #include <netinet/in.h> 39 #include <vfs/hammer2/hammer2_mount.h> 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <strings.h> 44 #include <unistd.h> 45 #include <dmsg.h> 46 47 static int cluster_connect(const char *volume); 48 49 /* 50 * Usage: mount_hammer2 [volume] [mtpt] 51 */ 52 int 53 main(int argc, char *argv[]) 54 { 55 struct hammer2_mount_info info; 56 struct vfsconf vfc; 57 char *mountpt; 58 int error; 59 int mount_flags; 60 61 bzero(&info, sizeof(info)); 62 mount_flags = 0; 63 64 if (argc < 3) 65 exit(1); 66 67 error = getvfsbyname("hammer2", &vfc); 68 if (error) { 69 fprintf(stderr, "hammer2 vfs not loaded\n"); 70 exit(1); 71 } 72 73 /* 74 * Connect to the cluster controller. This handles both remote 75 * mounts and device cache/master/slave mounts. 76 * 77 * When doing remote mounts that are allowed to run in the background 78 * the mount program will fork, detach, print a message, and exit(0) 79 * the originator while retrying in the background. 80 */ 81 info.cluster_fd = cluster_connect(argv[1]); 82 if (info.cluster_fd < 0) { 83 fprintf(stderr, 84 "hammer2_mount: cluster_connect(%s) failed\n", 85 argv[1]); 86 exit(1); 87 } 88 89 /* 90 * Try to mount it 91 */ 92 info.volume = argv[1]; 93 info.hflags = 0; 94 mountpt = argv[2]; 95 96 error = mount(vfc.vfc_name, mountpt, mount_flags, &info); 97 if (error < 0) { 98 if (errno == ERANGE) { 99 fprintf(stderr, 100 "%s integrated with %s\n", 101 info.volume, mountpt); 102 } else { 103 perror("mount: "); 104 exit(1); 105 } 106 } 107 108 /* 109 * XXX fork a backgrounded reconnector process to handle connection 110 * failures. XXX 111 */ 112 113 return (0); 114 } 115 116 /* 117 * Connect to the cluster controller. We can connect to a local or remote 118 * cluster controller, depending. For a multi-node cluster we always want 119 * to connect to the local controller and let it maintain the connections 120 * to the multiple remote nodes. 121 */ 122 static 123 int 124 cluster_connect(const char *volume __unused) 125 { 126 struct sockaddr_in lsin; 127 int fd; 128 129 /* 130 * This starts the hammer2 service if it isn't already running, 131 * so we can connect to it. 132 */ 133 system("/sbin/hammer2 -q service"); 134 135 /* 136 * Connect us to the service but leave the rest to the kernel. 137 * If the connection is lost during the mount 138 */ 139 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 140 perror("socket"); 141 return(-1); 142 } 143 bzero(&lsin, sizeof(lsin)); 144 lsin.sin_family = AF_INET; 145 lsin.sin_addr.s_addr = 0; 146 lsin.sin_port = htons(DMSG_LISTEN_PORT); 147 148 if (connect(fd, (struct sockaddr *)&lsin, sizeof(lsin)) < 0) { 149 close(fd); 150 fprintf(stderr, "mount_hammer2: unable to connect to " 151 "cluster controller\n"); 152 return(-1); 153 } 154 155 return(fd); 156 } 157