ninepuffs.c revision 1.27
1 /* $NetBSD: ninepuffs.c,v 1.27 2019/10/28 02:59:25 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * 9puffs: access a 9P file server as a vfs via puffs 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: ninepuffs.c,v 1.27 2019/10/28 02:59:25 ozaki-r Exp $"); 35 #endif /* !lint */ 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <sys/poll.h> 40 41 #include <netinet/in.h> 42 43 #include <assert.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <pwd.h> 47 #include <puffs.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 52 #include "ninepuffs.h" 53 #include "nineproto.h" 54 55 #define DEFPORT_9P 564 56 57 __dead static void 58 usage(void) 59 { 60 61 fprintf(stderr, "usage: %s [-su] [-o mntopts] [-p port] " 62 "[user@]server[:path] mountpoint\n", getprogname()); 63 fprintf(stderr, " %s -c [-su] [-o mntopts] devfile mountpoint\n", 64 getprogname()); 65 exit(1); 66 } 67 68 /* 69 * TCPv4 connection to 9P file server, forget IL and IPv6 for now. 70 * Return connected socket or exit with error. 71 */ 72 static int 73 serverconnect(const char *addr, unsigned short port) 74 { 75 struct sockaddr_in mysin; 76 struct hostent *he; 77 int s, ret, opt; 78 79 he = gethostbyname2(addr, AF_INET); 80 if (he == NULL) { 81 herror("gethostbyname"); 82 exit(1); 83 } 84 85 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); 86 if (s == -1) 87 err(1, "socket"); 88 89 opt = 1; 90 ret = setsockopt(s, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt)); 91 if (ret == -1) 92 err(1, "setsockopt(SO_NOSIGPIPE)"); 93 94 memset(&mysin, 0, sizeof(struct sockaddr_in)); 95 mysin.sin_family = AF_INET; 96 mysin.sin_port = htons(port); 97 memcpy(&mysin.sin_addr, he->h_addr, sizeof(struct in_addr)); 98 99 if (connect(s, (struct sockaddr *)&mysin, sizeof(mysin)) == -1) 100 err(1, "connect"); 101 102 return s; 103 } 104 105 static int 106 open_cdev(const char *path) 107 { 108 int s; 109 110 s = open(path, O_RDWR, 0); 111 if (s == -1) 112 err(1, "%s", path); 113 return s; 114 } 115 116 int 117 main(int argc, char *argv[]) 118 { 119 struct puffs9p p9p; 120 struct puffs_usermount *pu; 121 struct puffs_ops *pops; 122 struct puffs_node *pn_root; 123 mntoptparse_t mp; 124 const char *user, *srvhost, *srvpath; 125 char *p; 126 unsigned short port; 127 int mntflags, pflags, ch; 128 int detach; 129 int protover; 130 int server; 131 132 setprogname(argv[0]); 133 134 if (argc < 2) 135 usage(); 136 137 mntflags = pflags = 0; 138 detach = 1; 139 port = DEFPORT_9P; 140 protover = P9PROTO_VERSION; 141 server = P9P_SERVER_TCP; 142 143 while ((ch = getopt(argc, argv, "co:p:su")) != -1) { 144 switch (ch) { 145 case 'c': 146 server = P9P_SERVER_CDEV; 147 break; 148 case 'o': 149 mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags); 150 if (mp == NULL) 151 err(1, "getmntopts"); 152 freemntopts(mp); 153 break; 154 case 'p': 155 port = atoi(optarg); 156 break; 157 case 's': 158 detach = 0; 159 break; 160 case 'u': 161 protover = P9PROTO_VERSION_U; 162 break; 163 default: 164 usage(); 165 /*NOTREACHED*/ 166 } 167 } 168 argc -= optind; 169 argv += optind; 170 171 if (argc != 2) 172 usage(); 173 174 if (pflags & PUFFS_FLAG_OPDUMP) 175 detach = 0; 176 pflags |= PUFFS_KFLAG_WTCACHE | PUFFS_KFLAG_IAONDEMAND; 177 178 PUFFSOP_INIT(pops); 179 180 PUFFSOP_SET(pops, puffs9p, fs, unmount); 181 PUFFSOP_SETFSNOP(pops, sync); 182 PUFFSOP_SETFSNOP(pops, statvfs); 183 184 PUFFSOP_SET(pops, puffs9p, node, lookup); 185 PUFFSOP_SET(pops, puffs9p, node, readdir); 186 PUFFSOP_SET(pops, puffs9p, node, getattr); 187 PUFFSOP_SET(pops, puffs9p, node, setattr); 188 PUFFSOP_SET(pops, puffs9p, node, create); 189 PUFFSOP_SET(pops, puffs9p, node, open); 190 PUFFSOP_SET(pops, puffs9p, node, mkdir); 191 PUFFSOP_SET(pops, puffs9p, node, remove); 192 PUFFSOP_SET(pops, puffs9p, node, rmdir); 193 PUFFSOP_SET(pops, puffs9p, node, read); 194 PUFFSOP_SET(pops, puffs9p, node, write); 195 PUFFSOP_SET(pops, puffs9p, node, rename); 196 PUFFSOP_SET(pops, puffs9p, node, inactive); 197 PUFFSOP_SET(pops, puffs9p, node, reclaim); 198 #if 0 199 PUFFSOP_SET(pops, puffs9p, node, mknod); 200 #endif 201 202 pu = puffs_init(pops, argv[0], "9p", &p9p, pflags); 203 if (pu == NULL) 204 err(1, "puffs_init"); 205 206 memset(&p9p, 0, sizeof(p9p)); 207 p9p.maxreq = P9P_DEFREQLEN; 208 p9p.nextfid = 1; 209 p9p.protover = protover; 210 211 /* user@ */ 212 if ((p = strchr(argv[0], '@')) != NULL) { 213 *p = '\0'; 214 srvhost = p+1; 215 user = argv[0]; 216 } else { 217 struct passwd *pw; 218 219 srvhost = argv[0]; 220 pw = getpwuid(getuid()); 221 if (pw == NULL) 222 err(1, "getpwuid"); 223 user = pw->pw_name; 224 } 225 226 /* :/mountpath */ 227 if ((p = strchr(srvhost, ':')) != NULL) { 228 *p = '\0'; 229 srvpath = p+1; 230 if (*srvpath != '/') 231 errx(1, "%s is not an absolute path", srvpath); 232 } else { 233 srvpath = "/"; 234 } 235 236 if (server == P9P_SERVER_TCP) { 237 p9p.servsock = serverconnect(srvhost, port); 238 } else { 239 /* path to a viop9fs chardev file, e.g., /dev/viop9fs0 */ 240 p9p.servsock = open_cdev(argv[0]); 241 } 242 243 if ((pn_root = p9p_handshake(pu, user, srvpath)) == NULL) { 244 close(p9p.servsock); 245 puffs_exit(pu, 1); 246 exit(1); 247 } 248 249 puffs_framev_init(pu, p9pbuf_read, p9pbuf_write, p9pbuf_cmp, NULL, 250 puffs_framev_unmountonclose); 251 if (puffs_framev_addfd(pu, p9p.servsock, 252 PUFFS_FBIO_READ | PUFFS_FBIO_WRITE) == -1) 253 err(1, "puffs_framebuf_addfd"); 254 255 if (detach) 256 if (puffs_daemon(pu, 1, 1) == -1) 257 err(1, "puffs_daemon"); 258 259 if (puffs_mount(pu, argv[1], mntflags, pn_root) == -1) 260 err(1, "puffs_mount"); 261 if (puffs_setblockingmode(pu, PUFFSDEV_NONBLOCK) == -1) 262 err(1, "setblockingmode"); 263 264 if (puffs_mainloop(pu) == -1) 265 err(1, "mainloop"); 266 close(p9p.servsock); 267 puffs_exit(pu, 1); 268 269 return 0; 270 } 271
Indexes created Wed Oct 01 12:09:54 GMT 2025