1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/param.h>
36 #include <sys/syslog.h>
37 #include <sys/wait.h>
38 #include <sys/mount.h>
39 #include <sys/fcntl.h>
40 #include <sys/linker.h>
41 #include <sys/module.h>
42 #include <sys/types.h>
43 #include <sys/stat.h>
44 #include <sys/sysctl.h>
45 #include <sys/ucred.h>
46
47 #include <rpc/rpc.h>
48 #include <rpc/pmap_clnt.h>
49 #include <rpcsvc/nfs_prot.h>
50
51 #include <netdb.h>
52 #include <arpa/inet.h>
53 #include <nfs/nfssvc.h>
54
55 #include <fs/nfs/nfsproto.h>
56 #include <fs/nfs/nfskpiport.h>
57 #include <fs/nfs/nfs.h>
58
59 #include <err.h>
60 #include <errno.h>
61 #include <signal.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <unistd.h>
66 #include <sysexits.h>
67
68 #include <getopt.h>
69
70 static int debug = 0;
71 static int nofork = 0;
72
73 #define NFSD_STABLERESTART "/var/db/nfs-stablerestart"
74 #define NFSD_STABLEBACKUP "/var/db/nfs-stablerestart.bak"
75 #define MAXNFSDCNT 256
76 #define DEFNFSDCNT 4
77 #define NFS_VER2 2
78 #define NFS_VER3 3
79 #define NFS_VER4 4
80 static pid_t children[MAXNFSDCNT]; /* PIDs of children */
81 static pid_t masterpid; /* PID of master/parent */
82 static int nfsdcnt; /* number of children */
83 static int nfsdcnt_set;
84 static int minthreads;
85 static int maxthreads;
86 static int nfssvc_nfsd; /* Set to correct NFSSVC_xxx flag */
87 static int stablefd = -1; /* Fd for the stable restart file */
88 static int backupfd; /* Fd for the backup stable restart file */
89 static const char *getopt_shortopts;
90 static const char *getopt_usage;
91 static int nfs_minvers = NFS_VER2;
92
93 static int minthreads_set;
94 static int maxthreads_set;
95
96 static struct option longopts[] = {
97 { "debug", no_argument, &debug, 1 },
98 { "minthreads", required_argument, &minthreads_set, 1 },
99 { "maxthreads", required_argument, &maxthreads_set, 1 },
100 { "pnfs", required_argument, NULL, 'p' },
101 { "mirror", required_argument, NULL, 'm' },
102 { NULL, 0, NULL, 0}
103 };
104
105 static void cleanup(int);
106 static void child_cleanup(int);
107 static void killchildren(void);
108 static void nfsd_exit(int);
109 static void nonfs(int);
110 static void reapchild(int);
111 static int setbindhost(struct addrinfo **ia, const char *bindhost,
112 struct addrinfo hints);
113 static void start_server(int, struct nfsd_nfsd_args *, const char *vhost);
114 static void unregistration(void);
115 static void usage(void);
116 static void open_stable(int *, int *);
117 static void copy_stable(int, int);
118 static void backup_stable(int);
119 static void set_nfsdcnt(int);
120 static void parse_dsserver(const char *, struct nfsd_nfsd_args *);
121
122 /*
123 * Nfs server daemon mostly just a user context for nfssvc()
124 *
125 * 1 - do file descriptor and signal cleanup
126 * 2 - fork the nfsd(s)
127 * 3 - create server socket(s)
128 * 4 - register socket with rpcbind
129 *
130 * For connectionless protocols, just pass the socket into the kernel via.
131 * nfssvc().
132 * For connection based sockets, loop doing accepts. When you get a new
133 * socket from accept, pass the msgsock into the kernel via. nfssvc().
134 * The arguments are:
135 * -r - reregister with rpcbind
136 * -d - unregister with rpcbind
137 * -t - support tcp nfs clients
138 * -u - support udp nfs clients
139 * -e - forces it to run a server that supports nfsv4
140 * -p - enable a pNFS service
141 * -m - set the mirroring level for a pNFS service
142 * followed by "n" which is the number of nfsds' to fork off
143 */
144 int
main(int argc,char ** argv)145 main(int argc, char **argv)
146 {
147 struct nfsd_addsock_args addsockargs;
148 struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints;
149 struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6;
150 struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6;
151 struct sockaddr_storage peer;
152 fd_set ready, sockbits;
153 int ch, connect_type_cnt, i, maxsock, msgsock;
154 socklen_t len;
155 int on = 1, unregister, reregister, sock;
156 int tcp6sock, ip6flag, tcpflag, tcpsock;
157 int udpflag, ecode, error, s;
158 int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
159 int nfssvc_addsock;
160 int jailed, longindex = 0;
161 size_t jailed_size, nfs_minvers_size;
162 const char *lopt;
163 char **bindhost = NULL;
164 pid_t pid;
165 struct nfsd_nfsd_args nfsdargs;
166 const char *vhostname = NULL;
167
168 nfsdargs.mirrorcnt = 1;
169 nfsdargs.addr = NULL;
170 nfsdargs.addrlen = 0;
171 nfsdcnt = DEFNFSDCNT;
172 unregister = reregister = tcpflag = maxsock = 0;
173 bindanyflag = udpflag = connect_type_cnt = bindhostc = 0;
174 getopt_shortopts = "ah:n:rdtuep:m:V:N";
175 getopt_usage =
176 "usage:\n"
177 " nfsd [-ardtueN] [-h bindip]\n"
178 " [-n numservers] [--minthreads #] [--maxthreads #]\n"
179 " [-p/--pnfs dsserver0:/dsserver0-mounted-on-dir,...,"
180 "dsserverN:/dsserverN-mounted-on-dir] [-m mirrorlevel]\n"
181 " [-V virtual_hostname]\n";
182 while ((ch = getopt_long(argc, argv, getopt_shortopts, longopts,
183 &longindex)) != -1)
184 switch (ch) {
185 case 'V':
186 if (strlen(optarg) <= MAXHOSTNAMELEN)
187 vhostname = optarg;
188 else
189 warnx("Virtual host name (%s) is too long",
190 optarg);
191 break;
192 case 'a':
193 bindanyflag = 1;
194 break;
195 case 'n':
196 set_nfsdcnt(atoi(optarg));
197 break;
198 case 'h':
199 bindhostc++;
200 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
201 if (bindhost == NULL)
202 errx(1, "Out of memory");
203 bindhost[bindhostc-1] = strdup(optarg);
204 if (bindhost[bindhostc-1] == NULL)
205 errx(1, "Out of memory");
206 break;
207 case 'r':
208 reregister = 1;
209 break;
210 case 'd':
211 unregister = 1;
212 break;
213 case 't':
214 tcpflag = 1;
215 break;
216 case 'u':
217 udpflag = 1;
218 break;
219 case 'e':
220 /* now a no-op, since this is the default */
221 break;
222 case 'p':
223 /* Parse out the DS server host names and mount pts. */
224 parse_dsserver(optarg, &nfsdargs);
225 break;
226 case 'm':
227 /* Set the mirror level for a pNFS service. */
228 i = atoi(optarg);
229 if (i < 2 || i > NFSDEV_MAXMIRRORS)
230 errx(1, "Mirror level out of range 2<-->%d",
231 NFSDEV_MAXMIRRORS);
232 nfsdargs.mirrorcnt = i;
233 break;
234 case 'N':
235 nofork = 1;
236 break;
237 case 0:
238 lopt = longopts[longindex].name;
239 if (!strcmp(lopt, "minthreads")) {
240 minthreads = atoi(optarg);
241 } else if (!strcmp(lopt, "maxthreads")) {
242 maxthreads = atoi(optarg);
243 }
244 break;
245 default:
246 case '?':
247 usage();
248 }
249 if (!tcpflag && !udpflag)
250 udpflag = 1;
251 argv += optind;
252 argc -= optind;
253 if (minthreads_set && maxthreads_set && minthreads > maxthreads)
254 errx(EX_USAGE,
255 "error: minthreads(%d) can't be greater than "
256 "maxthreads(%d)", minthreads, maxthreads);
257
258 /*
259 * XXX
260 * Backward compatibility, trailing number is the count of daemons.
261 */
262 if (argc > 1)
263 usage();
264 if (argc == 1)
265 set_nfsdcnt(atoi(argv[0]));
266
267 /*
268 * Unless the "-o" option was specified, try and run "nfsd".
269 * If "-o" was specified, try and run "nfsserver".
270 */
271 if (modfind("nfsd") < 0) {
272 /* Not present in kernel, try loading it */
273 if (kldload("nfsd") < 0 || modfind("nfsd") < 0)
274 errx(1, "NFS server is not available");
275 }
276
277 ip6flag = 1;
278 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
279 if (s == -1) {
280 if (errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT)
281 err(1, "socket");
282 ip6flag = 0;
283 } else if (getnetconfigent("udp6") == NULL ||
284 getnetconfigent("tcp6") == NULL) {
285 ip6flag = 0;
286 }
287 if (s != -1)
288 close(s);
289
290 if (bindhostc == 0 || bindanyflag) {
291 bindhostc++;
292 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
293 if (bindhost == NULL)
294 errx(1, "Out of memory");
295 bindhost[bindhostc-1] = strdup("*");
296 if (bindhost[bindhostc-1] == NULL)
297 errx(1, "Out of memory");
298 }
299
300 if (unregister) {
301 /*
302 * Unregister before setting nfs_minvers, in case the
303 * value of vfs.nfsd.server_min_nfsvers has changed
304 * since registering with rpcbind.
305 */
306 unregistration();
307 exit (0);
308 }
309
310 nfs_minvers_size = sizeof(nfs_minvers);
311 error = sysctlbyname("vfs.nfsd.server_min_nfsvers", &nfs_minvers,
312 &nfs_minvers_size, NULL, 0);
313 if (error != 0 || nfs_minvers < NFS_VER2 || nfs_minvers > NFS_VER4) {
314 warnx("sysctlbyname(vfs.nfsd.server_min_nfsvers) failed,"
315 " defaulting to NFSv2");
316 nfs_minvers = NFS_VER2;
317 }
318
319 if (reregister) {
320 if (udpflag) {
321 memset(&hints, 0, sizeof hints);
322 hints.ai_flags = AI_PASSIVE;
323 hints.ai_family = AF_INET;
324 hints.ai_socktype = SOCK_DGRAM;
325 hints.ai_protocol = IPPROTO_UDP;
326 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
327 if (ecode != 0)
328 err(1, "getaddrinfo udp: %s", gai_strerror(ecode));
329 nconf_udp = getnetconfigent("udp");
330 if (nconf_udp == NULL)
331 err(1, "getnetconfigent udp failed");
332 nb_udp.buf = ai_udp->ai_addr;
333 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
334 if (nfs_minvers == NFS_VER2)
335 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp,
336 &nb_udp))
337 err(1, "rpcb_set udp failed");
338 if (nfs_minvers <= NFS_VER3)
339 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp,
340 &nb_udp))
341 err(1, "rpcb_set udp failed");
342 freeaddrinfo(ai_udp);
343 }
344 if (udpflag && ip6flag) {
345 memset(&hints, 0, sizeof hints);
346 hints.ai_flags = AI_PASSIVE;
347 hints.ai_family = AF_INET6;
348 hints.ai_socktype = SOCK_DGRAM;
349 hints.ai_protocol = IPPROTO_UDP;
350 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
351 if (ecode != 0)
352 err(1, "getaddrinfo udp6: %s", gai_strerror(ecode));
353 nconf_udp6 = getnetconfigent("udp6");
354 if (nconf_udp6 == NULL)
355 err(1, "getnetconfigent udp6 failed");
356 nb_udp6.buf = ai_udp6->ai_addr;
357 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
358 if (nfs_minvers == NFS_VER2)
359 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6,
360 &nb_udp6))
361 err(1, "rpcb_set udp6 failed");
362 if (nfs_minvers <= NFS_VER3)
363 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6,
364 &nb_udp6))
365 err(1, "rpcb_set udp6 failed");
366 freeaddrinfo(ai_udp6);
367 }
368 if (tcpflag) {
369 memset(&hints, 0, sizeof hints);
370 hints.ai_flags = AI_PASSIVE;
371 hints.ai_family = AF_INET;
372 hints.ai_socktype = SOCK_STREAM;
373 hints.ai_protocol = IPPROTO_TCP;
374 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp);
375 if (ecode != 0)
376 err(1, "getaddrinfo tcp: %s", gai_strerror(ecode));
377 nconf_tcp = getnetconfigent("tcp");
378 if (nconf_tcp == NULL)
379 err(1, "getnetconfigent tcp failed");
380 nb_tcp.buf = ai_tcp->ai_addr;
381 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
382 if (nfs_minvers == NFS_VER2)
383 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp,
384 &nb_tcp))
385 err(1, "rpcb_set tcp failed");
386 if (nfs_minvers <= NFS_VER3)
387 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp,
388 &nb_tcp))
389 err(1, "rpcb_set tcp failed");
390 freeaddrinfo(ai_tcp);
391 }
392 if (tcpflag && ip6flag) {
393 memset(&hints, 0, sizeof hints);
394 hints.ai_flags = AI_PASSIVE;
395 hints.ai_family = AF_INET6;
396 hints.ai_socktype = SOCK_STREAM;
397 hints.ai_protocol = IPPROTO_TCP;
398 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
399 if (ecode != 0)
400 err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode));
401 nconf_tcp6 = getnetconfigent("tcp6");
402 if (nconf_tcp6 == NULL)
403 err(1, "getnetconfigent tcp6 failed");
404 nb_tcp6.buf = ai_tcp6->ai_addr;
405 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
406 if (nfs_minvers == NFS_VER2)
407 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6,
408 &nb_tcp6))
409 err(1, "rpcb_set tcp6 failed");
410 if (nfs_minvers <= NFS_VER3)
411 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6,
412 &nb_tcp6))
413 err(1, "rpcb_set tcp6 failed");
414 freeaddrinfo(ai_tcp6);
415 }
416 exit (0);
417 }
418 if (debug == 0 && nofork == 0) {
419 daemon(0, 0);
420 (void)signal(SIGHUP, SIG_IGN);
421 (void)signal(SIGINT, SIG_IGN);
422 /*
423 * nfsd sits in the kernel most of the time. It needs
424 * to ignore SIGTERM/SIGQUIT in order to stay alive as long
425 * as possible during a shutdown, otherwise loopback
426 * mounts will not be able to unmount.
427 */
428 (void)signal(SIGTERM, SIG_IGN);
429 (void)signal(SIGQUIT, SIG_IGN);
430 }
431 (void)signal(SIGSYS, nonfs);
432 (void)signal(SIGCHLD, reapchild);
433 (void)signal(SIGUSR2, backup_stable);
434
435 openlog("nfsd", LOG_PID | (debug ? LOG_PERROR : 0), LOG_DAEMON);
436
437 /*
438 * For V4, we open the stablerestart file and call nfssvc()
439 * to get it loaded. This is done before the daemons do the
440 * regular nfssvc() call to service NFS requests.
441 * (This way the file remains open until the last nfsd is killed
442 * off.)
443 * It and the backup copy will be created as empty files
444 * the first time this nfsd is started and should never be
445 * deleted/replaced if at all possible. It should live on a
446 * local, non-volatile storage device that does not do hardware
447 * level write-back caching. (See SCSI doc for more information
448 * on how to prevent write-back caching on SCSI disks.)
449 */
450 open_stable(&stablefd, &backupfd);
451 if (stablefd < 0) {
452 syslog(LOG_ERR, "Can't open %s: %m\n", NFSD_STABLERESTART);
453 exit(1);
454 }
455 /* This system call will fail for old kernels, but that's ok. */
456 nfssvc(NFSSVC_BACKUPSTABLE, NULL);
457 if (nfssvc(NFSSVC_STABLERESTART, (caddr_t)&stablefd) < 0) {
458 if (errno == EPERM) {
459 jailed = 0;
460 jailed_size = sizeof(jailed);
461 sysctlbyname("security.jail.jailed", &jailed,
462 &jailed_size, NULL, 0);
463 if (jailed != 0)
464 syslog(LOG_ERR, "nfssvc stablerestart failed: "
465 "allow.nfsd might not be configured");
466 else
467 syslog(LOG_ERR, "nfssvc stablerestart failed");
468 } else if (errno == ENXIO)
469 syslog(LOG_ERR, "nfssvc stablerestart failed: is nfsd "
470 "already running?");
471 else
472 syslog(LOG_ERR, "Can't read stable storage file: %m\n");
473 exit(1);
474 }
475 nfssvc_addsock = NFSSVC_NFSDADDSOCK;
476 nfssvc_nfsd = NFSSVC_NFSDNFSD | NFSSVC_NEWSTRUCT;
477
478 if (tcpflag) {
479 /*
480 * For TCP mode, we fork once to start the first
481 * kernel nfsd thread. The kernel will add more
482 * threads as needed.
483 */
484 masterpid = getpid();
485 pid = fork();
486 if (pid == -1) {
487 syslog(LOG_ERR, "fork: %m");
488 nfsd_exit(1);
489 }
490 if (pid) {
491 children[0] = pid;
492 } else {
493 (void)signal(SIGUSR1, child_cleanup);
494 setproctitle("server");
495 start_server(0, &nfsdargs, vhostname);
496 }
497 }
498
499 (void)signal(SIGUSR1, cleanup);
500 FD_ZERO(&sockbits);
501
502 rpcbregcnt = 0;
503 /* Set up the socket for udp and rpcb register it. */
504 if (udpflag) {
505 rpcbreg = 0;
506 for (i = 0; i < bindhostc; i++) {
507 memset(&hints, 0, sizeof hints);
508 hints.ai_flags = AI_PASSIVE;
509 hints.ai_family = AF_INET;
510 hints.ai_socktype = SOCK_DGRAM;
511 hints.ai_protocol = IPPROTO_UDP;
512 if (setbindhost(&ai_udp, bindhost[i], hints) == 0) {
513 rpcbreg = 1;
514 rpcbregcnt++;
515 if ((sock = socket(ai_udp->ai_family,
516 ai_udp->ai_socktype,
517 ai_udp->ai_protocol)) < 0) {
518 syslog(LOG_ERR,
519 "can't create udp socket");
520 nfsd_exit(1);
521 }
522 if (bind(sock, ai_udp->ai_addr,
523 ai_udp->ai_addrlen) < 0) {
524 syslog(LOG_ERR,
525 "can't bind udp addr %s: %m",
526 bindhost[i]);
527 nfsd_exit(1);
528 }
529 freeaddrinfo(ai_udp);
530 addsockargs.sock = sock;
531 addsockargs.name = NULL;
532 addsockargs.namelen = 0;
533 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
534 syslog(LOG_ERR, "can't Add UDP socket");
535 nfsd_exit(1);
536 }
537 (void)close(sock);
538 }
539 }
540 if (rpcbreg == 1) {
541 memset(&hints, 0, sizeof hints);
542 hints.ai_flags = AI_PASSIVE;
543 hints.ai_family = AF_INET;
544 hints.ai_socktype = SOCK_DGRAM;
545 hints.ai_protocol = IPPROTO_UDP;
546 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
547 if (ecode != 0) {
548 syslog(LOG_ERR, "getaddrinfo udp: %s",
549 gai_strerror(ecode));
550 nfsd_exit(1);
551 }
552 nconf_udp = getnetconfigent("udp");
553 if (nconf_udp == NULL) {
554 syslog(LOG_ERR, "getnetconfigent udp failed");
555 nfsd_exit(1);
556 }
557 nb_udp.buf = ai_udp->ai_addr;
558 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
559 if (nfs_minvers == NFS_VER2)
560 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp,
561 &nb_udp)) {
562 syslog(LOG_ERR, "rpcb_set udp failed");
563 nfsd_exit(1);
564 }
565 if (nfs_minvers <= NFS_VER3)
566 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp,
567 &nb_udp)) {
568 syslog(LOG_ERR, "rpcb_set udp failed");
569 nfsd_exit(1);
570 }
571 freeaddrinfo(ai_udp);
572 }
573 }
574
575 /* Set up the socket for udp6 and rpcb register it. */
576 if (udpflag && ip6flag) {
577 rpcbreg = 0;
578 for (i = 0; i < bindhostc; i++) {
579 memset(&hints, 0, sizeof hints);
580 hints.ai_flags = AI_PASSIVE;
581 hints.ai_family = AF_INET6;
582 hints.ai_socktype = SOCK_DGRAM;
583 hints.ai_protocol = IPPROTO_UDP;
584 if (setbindhost(&ai_udp6, bindhost[i], hints) == 0) {
585 rpcbreg = 1;
586 rpcbregcnt++;
587 if ((sock = socket(ai_udp6->ai_family,
588 ai_udp6->ai_socktype,
589 ai_udp6->ai_protocol)) < 0) {
590 syslog(LOG_ERR,
591 "can't create udp6 socket");
592 nfsd_exit(1);
593 }
594 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
595 &on, sizeof on) < 0) {
596 syslog(LOG_ERR,
597 "can't set v6-only binding for "
598 "udp6 socket: %m");
599 nfsd_exit(1);
600 }
601 if (bind(sock, ai_udp6->ai_addr,
602 ai_udp6->ai_addrlen) < 0) {
603 syslog(LOG_ERR,
604 "can't bind udp6 addr %s: %m",
605 bindhost[i]);
606 nfsd_exit(1);
607 }
608 freeaddrinfo(ai_udp6);
609 addsockargs.sock = sock;
610 addsockargs.name = NULL;
611 addsockargs.namelen = 0;
612 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
613 syslog(LOG_ERR,
614 "can't add UDP6 socket");
615 nfsd_exit(1);
616 }
617 (void)close(sock);
618 }
619 }
620 if (rpcbreg == 1) {
621 memset(&hints, 0, sizeof hints);
622 hints.ai_flags = AI_PASSIVE;
623 hints.ai_family = AF_INET6;
624 hints.ai_socktype = SOCK_DGRAM;
625 hints.ai_protocol = IPPROTO_UDP;
626 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
627 if (ecode != 0) {
628 syslog(LOG_ERR, "getaddrinfo udp6: %s",
629 gai_strerror(ecode));
630 nfsd_exit(1);
631 }
632 nconf_udp6 = getnetconfigent("udp6");
633 if (nconf_udp6 == NULL) {
634 syslog(LOG_ERR, "getnetconfigent udp6 failed");
635 nfsd_exit(1);
636 }
637 nb_udp6.buf = ai_udp6->ai_addr;
638 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
639 if (nfs_minvers == NFS_VER2)
640 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6,
641 &nb_udp6)) {
642 syslog(LOG_ERR,
643 "rpcb_set udp6 failed");
644 nfsd_exit(1);
645 }
646 if (nfs_minvers <= NFS_VER3)
647 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6,
648 &nb_udp6)) {
649 syslog(LOG_ERR,
650 "rpcb_set udp6 failed");
651 nfsd_exit(1);
652 }
653 freeaddrinfo(ai_udp6);
654 }
655 }
656
657 /* Set up the socket for tcp and rpcb register it. */
658 if (tcpflag) {
659 rpcbreg = 0;
660 for (i = 0; i < bindhostc; i++) {
661 memset(&hints, 0, sizeof hints);
662 hints.ai_flags = AI_PASSIVE;
663 hints.ai_family = AF_INET;
664 hints.ai_socktype = SOCK_STREAM;
665 hints.ai_protocol = IPPROTO_TCP;
666 if (setbindhost(&ai_tcp, bindhost[i], hints) == 0) {
667 rpcbreg = 1;
668 rpcbregcnt++;
669 if ((tcpsock = socket(AF_INET, SOCK_STREAM,
670 0)) < 0) {
671 syslog(LOG_ERR,
672 "can't create tcp socket");
673 nfsd_exit(1);
674 }
675 if (setsockopt(tcpsock, SOL_SOCKET,
676 SO_REUSEADDR,
677 (char *)&on, sizeof(on)) < 0)
678 syslog(LOG_ERR,
679 "setsockopt SO_REUSEADDR: %m");
680 if (bind(tcpsock, ai_tcp->ai_addr,
681 ai_tcp->ai_addrlen) < 0) {
682 syslog(LOG_ERR,
683 "can't bind tcp addr %s: %m",
684 bindhost[i]);
685 nfsd_exit(1);
686 }
687 if (listen(tcpsock, -1) < 0) {
688 syslog(LOG_ERR, "listen failed");
689 nfsd_exit(1);
690 }
691 freeaddrinfo(ai_tcp);
692 FD_SET(tcpsock, &sockbits);
693 maxsock = tcpsock;
694 connect_type_cnt++;
695 }
696 }
697 if (rpcbreg == 1) {
698 memset(&hints, 0, sizeof hints);
699 hints.ai_flags = AI_PASSIVE;
700 hints.ai_family = AF_INET;
701 hints.ai_socktype = SOCK_STREAM;
702 hints.ai_protocol = IPPROTO_TCP;
703 ecode = getaddrinfo(NULL, "nfs", &hints,
704 &ai_tcp);
705 if (ecode != 0) {
706 syslog(LOG_ERR, "getaddrinfo tcp: %s",
707 gai_strerror(ecode));
708 nfsd_exit(1);
709 }
710 nconf_tcp = getnetconfigent("tcp");
711 if (nconf_tcp == NULL) {
712 syslog(LOG_ERR, "getnetconfigent tcp failed");
713 nfsd_exit(1);
714 }
715 nb_tcp.buf = ai_tcp->ai_addr;
716 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
717 if (nfs_minvers == NFS_VER2)
718 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp,
719 &nb_tcp)) {
720 syslog(LOG_ERR, "rpcb_set tcp failed");
721 nfsd_exit(1);
722 }
723 if (nfs_minvers <= NFS_VER3)
724 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp,
725 &nb_tcp)) {
726 syslog(LOG_ERR, "rpcb_set tcp failed");
727 nfsd_exit(1);
728 }
729 freeaddrinfo(ai_tcp);
730 }
731 }
732
733 /* Set up the socket for tcp6 and rpcb register it. */
734 if (tcpflag && ip6flag) {
735 rpcbreg = 0;
736 for (i = 0; i < bindhostc; i++) {
737 memset(&hints, 0, sizeof hints);
738 hints.ai_flags = AI_PASSIVE;
739 hints.ai_family = AF_INET6;
740 hints.ai_socktype = SOCK_STREAM;
741 hints.ai_protocol = IPPROTO_TCP;
742 if (setbindhost(&ai_tcp6, bindhost[i], hints) == 0) {
743 rpcbreg = 1;
744 rpcbregcnt++;
745 if ((tcp6sock = socket(ai_tcp6->ai_family,
746 ai_tcp6->ai_socktype,
747 ai_tcp6->ai_protocol)) < 0) {
748 syslog(LOG_ERR,
749 "can't create tcp6 socket");
750 nfsd_exit(1);
751 }
752 if (setsockopt(tcp6sock, SOL_SOCKET,
753 SO_REUSEADDR,
754 (char *)&on, sizeof(on)) < 0)
755 syslog(LOG_ERR,
756 "setsockopt SO_REUSEADDR: %m");
757 if (setsockopt(tcp6sock, IPPROTO_IPV6,
758 IPV6_V6ONLY, &on, sizeof on) < 0) {
759 syslog(LOG_ERR,
760 "can't set v6-only binding for tcp6 "
761 "socket: %m");
762 nfsd_exit(1);
763 }
764 if (bind(tcp6sock, ai_tcp6->ai_addr,
765 ai_tcp6->ai_addrlen) < 0) {
766 syslog(LOG_ERR,
767 "can't bind tcp6 addr %s: %m",
768 bindhost[i]);
769 nfsd_exit(1);
770 }
771 if (listen(tcp6sock, -1) < 0) {
772 syslog(LOG_ERR, "listen failed");
773 nfsd_exit(1);
774 }
775 freeaddrinfo(ai_tcp6);
776 FD_SET(tcp6sock, &sockbits);
777 if (maxsock < tcp6sock)
778 maxsock = tcp6sock;
779 connect_type_cnt++;
780 }
781 }
782 if (rpcbreg == 1) {
783 memset(&hints, 0, sizeof hints);
784 hints.ai_flags = AI_PASSIVE;
785 hints.ai_family = AF_INET6;
786 hints.ai_socktype = SOCK_STREAM;
787 hints.ai_protocol = IPPROTO_TCP;
788 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
789 if (ecode != 0) {
790 syslog(LOG_ERR, "getaddrinfo tcp6: %s",
791 gai_strerror(ecode));
792 nfsd_exit(1);
793 }
794 nconf_tcp6 = getnetconfigent("tcp6");
795 if (nconf_tcp6 == NULL) {
796 syslog(LOG_ERR, "getnetconfigent tcp6 failed");
797 nfsd_exit(1);
798 }
799 nb_tcp6.buf = ai_tcp6->ai_addr;
800 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
801 if (nfs_minvers == NFS_VER2)
802 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6,
803 &nb_tcp6)) {
804 syslog(LOG_ERR, "rpcb_set tcp6 failed");
805 nfsd_exit(1);
806 }
807 if (nfs_minvers <= NFS_VER3)
808 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6,
809 &nb_tcp6)) {
810 syslog(LOG_ERR, "rpcb_set tcp6 failed");
811 nfsd_exit(1);
812 }
813 freeaddrinfo(ai_tcp6);
814 }
815 }
816
817 if (rpcbregcnt == 0) {
818 syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
819 nfsd_exit(1);
820 }
821
822 if (tcpflag && connect_type_cnt == 0) {
823 syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
824 nfsd_exit(1);
825 }
826
827 setproctitle("master");
828 /*
829 * We always want a master to have a clean way to shut nfsd down
830 * (with unregistration): if the master is killed, it unregisters and
831 * kills all children. If we run for UDP only (and so do not have to
832 * loop waiting for accept), we instead make the parent
833 * a "server" too. start_server will not return.
834 */
835 if (!tcpflag)
836 start_server(1, &nfsdargs, vhostname);
837
838 /*
839 * Loop forever accepting connections and passing the sockets
840 * into the kernel for the mounts.
841 */
842 for (;;) {
843 ready = sockbits;
844 if (connect_type_cnt > 1) {
845 if (select(maxsock + 1,
846 &ready, NULL, NULL, NULL) < 1) {
847 error = errno;
848 if (error == EINTR)
849 continue;
850 syslog(LOG_ERR, "select failed: %m");
851 nfsd_exit(1);
852 }
853 }
854 for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
855 if (FD_ISSET(tcpsock, &ready)) {
856 len = sizeof(peer);
857 if ((msgsock = accept(tcpsock,
858 (struct sockaddr *)&peer, &len)) < 0) {
859 error = errno;
860 syslog(LOG_ERR, "accept failed: %m");
861 if (error == ECONNABORTED ||
862 error == EINTR)
863 continue;
864 nfsd_exit(1);
865 }
866 if (setsockopt(msgsock, SOL_SOCKET,
867 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
868 syslog(LOG_ERR,
869 "setsockopt SO_KEEPALIVE: %m");
870 addsockargs.sock = msgsock;
871 addsockargs.name = (caddr_t)&peer;
872 addsockargs.namelen = len;
873 nfssvc(nfssvc_addsock, &addsockargs);
874 (void)close(msgsock);
875 }
876 }
877 }
878 }
879
880 static int
setbindhost(struct addrinfo ** ai,const char * bindhost,struct addrinfo hints)881 setbindhost(struct addrinfo **ai, const char *bindhost, struct addrinfo hints)
882 {
883 int ecode;
884 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
885 const char *hostptr;
886
887 if (bindhost == NULL || strcmp("*", bindhost) == 0)
888 hostptr = NULL;
889 else
890 hostptr = bindhost;
891
892 if (hostptr != NULL) {
893 switch (hints.ai_family) {
894 case AF_INET:
895 if (inet_pton(AF_INET, hostptr, host_addr) == 1) {
896 hints.ai_flags = AI_NUMERICHOST;
897 } else {
898 if (inet_pton(AF_INET6, hostptr,
899 host_addr) == 1)
900 return (1);
901 }
902 break;
903 case AF_INET6:
904 if (inet_pton(AF_INET6, hostptr, host_addr) == 1) {
905 hints.ai_flags = AI_NUMERICHOST;
906 } else {
907 if (inet_pton(AF_INET, hostptr,
908 host_addr) == 1)
909 return (1);
910 }
911 break;
912 default:
913 break;
914 }
915 }
916
917 ecode = getaddrinfo(hostptr, "nfs", &hints, ai);
918 if (ecode != 0) {
919 syslog(LOG_ERR, "getaddrinfo %s: %s", bindhost,
920 gai_strerror(ecode));
921 return (1);
922 }
923 return (0);
924 }
925
926 static void
set_nfsdcnt(int proposed)927 set_nfsdcnt(int proposed)
928 {
929
930 if (proposed < 1) {
931 warnx("nfsd count too low %d; reset to %d", proposed,
932 DEFNFSDCNT);
933 nfsdcnt = DEFNFSDCNT;
934 } else if (proposed > MAXNFSDCNT) {
935 warnx("nfsd count too high %d; truncated to %d", proposed,
936 MAXNFSDCNT);
937 nfsdcnt = MAXNFSDCNT;
938 } else
939 nfsdcnt = proposed;
940 nfsdcnt_set = 1;
941 }
942
943 static void
usage(void)944 usage(void)
945 {
946 (void)fprintf(stderr, "%s", getopt_usage);
947 exit(1);
948 }
949
950 static void
nonfs(__unused int signo)951 nonfs(__unused int signo)
952 {
953 syslog(LOG_ERR, "missing system call: NFS not available");
954 }
955
956 static void
reapchild(__unused int signo)957 reapchild(__unused int signo)
958 {
959 pid_t pid;
960 int i;
961
962 while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
963 for (i = 0; i < nfsdcnt; i++)
964 if (pid == children[i])
965 children[i] = -1;
966 }
967 }
968
969 static void
unregistration(void)970 unregistration(void)
971 {
972 if ((nfs_minvers == NFS_VER2 && !rpcb_unset(NFS_PROGRAM, 2, NULL)) ||
973 (nfs_minvers <= NFS_VER3 && !rpcb_unset(NFS_PROGRAM, 3, NULL)))
974 syslog(LOG_ERR, "rpcb_unset failed");
975 }
976
977 static void
killchildren(void)978 killchildren(void)
979 {
980 int i;
981
982 for (i = 0; i < nfsdcnt; i++) {
983 if (children[i] > 0)
984 kill(children[i], SIGKILL);
985 }
986 }
987
988 /*
989 * Cleanup master after SIGUSR1.
990 */
991 static void
cleanup(__unused int signo)992 cleanup(__unused int signo)
993 {
994 nfsd_exit(0);
995 }
996
997 /*
998 * Cleanup child after SIGUSR1.
999 */
1000 static void
child_cleanup(__unused int signo)1001 child_cleanup(__unused int signo)
1002 {
1003 exit(0);
1004 }
1005
1006 static void
nfsd_exit(int status)1007 nfsd_exit(int status)
1008 {
1009 killchildren();
1010 unregistration();
1011 exit(status);
1012 }
1013
1014 static int
get_tuned_nfsdcount(void)1015 get_tuned_nfsdcount(void)
1016 {
1017 int ncpu, error, tuned_nfsdcnt;
1018 size_t ncpu_size;
1019
1020 ncpu_size = sizeof(ncpu);
1021 error = sysctlbyname("hw.ncpu", &ncpu, &ncpu_size, NULL, 0);
1022 if (error) {
1023 warnx("sysctlbyname(hw.ncpu) failed defaulting to %d nfs servers",
1024 DEFNFSDCNT);
1025 tuned_nfsdcnt = DEFNFSDCNT;
1026 } else {
1027 tuned_nfsdcnt = ncpu * 8;
1028 }
1029 return tuned_nfsdcnt;
1030 }
1031
1032 static void
start_server(int master,struct nfsd_nfsd_args * nfsdargp,const char * vhost)1033 start_server(int master, struct nfsd_nfsd_args *nfsdargp, const char *vhost)
1034 {
1035 char principal[MAXHOSTNAMELEN + 5];
1036 int status, error;
1037 char hostname[MAXHOSTNAMELEN + 1], *cp;
1038 struct addrinfo *aip, hints;
1039
1040 status = 0;
1041 if (vhost == NULL)
1042 gethostname(hostname, sizeof (hostname));
1043 else
1044 strlcpy(hostname, vhost, sizeof (hostname));
1045 snprintf(principal, sizeof (principal), "nfs@%s", hostname);
1046 if ((cp = strchr(hostname, '.')) == NULL ||
1047 *(cp + 1) == '\0') {
1048 /* If not fully qualified, try getaddrinfo() */
1049 memset((void *)&hints, 0, sizeof (hints));
1050 hints.ai_flags = AI_CANONNAME;
1051 error = getaddrinfo(hostname, NULL, &hints, &aip);
1052 if (error == 0) {
1053 if (aip->ai_canonname != NULL &&
1054 (cp = strchr(aip->ai_canonname, '.')) !=
1055 NULL && *(cp + 1) != '\0')
1056 snprintf(principal, sizeof (principal),
1057 "nfs@%s", aip->ai_canonname);
1058 freeaddrinfo(aip);
1059 }
1060 }
1061 nfsdargp->principal = principal;
1062
1063 if (nfsdcnt_set)
1064 nfsdargp->minthreads = nfsdargp->maxthreads = nfsdcnt;
1065 else {
1066 nfsdargp->minthreads = minthreads_set ? minthreads : get_tuned_nfsdcount();
1067 nfsdargp->maxthreads = maxthreads_set ? maxthreads : nfsdargp->minthreads;
1068 if (nfsdargp->maxthreads < nfsdargp->minthreads)
1069 nfsdargp->maxthreads = nfsdargp->minthreads;
1070 }
1071 error = nfssvc(nfssvc_nfsd, nfsdargp);
1072 if (error < 0 && errno == EAUTH) {
1073 /*
1074 * This indicates that it could not register the
1075 * rpcsec_gss credentials, usually because the
1076 * gssd daemon isn't running.
1077 * (only the experimental server with nfsv4)
1078 */
1079 syslog(LOG_ERR, "No gssd, using AUTH_SYS only");
1080 principal[0] = '\0';
1081 error = nfssvc(nfssvc_nfsd, nfsdargp);
1082 }
1083 if (error < 0) {
1084 if (errno == ENXIO) {
1085 syslog(LOG_ERR, "Bad -p option, cannot run");
1086 if (masterpid != 0 && master == 0)
1087 kill(masterpid, SIGUSR1);
1088 } else
1089 syslog(LOG_ERR, "nfssvc: %m");
1090 status = 1;
1091 }
1092 if (master)
1093 nfsd_exit(status);
1094 else
1095 exit(status);
1096 }
1097
1098 /*
1099 * Open the stable restart file and return the file descriptor for it.
1100 */
1101 static void
open_stable(int * stable_fdp,int * backup_fdp)1102 open_stable(int *stable_fdp, int *backup_fdp)
1103 {
1104 int stable_fd, backup_fd = -1, ret;
1105 struct stat st, backup_st;
1106
1107 /* Open and stat the stable restart file. */
1108 stable_fd = open(NFSD_STABLERESTART, O_RDWR, 0);
1109 if (stable_fd < 0)
1110 stable_fd = open(NFSD_STABLERESTART, O_RDWR | O_CREAT, 0600);
1111 if (stable_fd >= 0) {
1112 ret = fstat(stable_fd, &st);
1113 if (ret < 0) {
1114 close(stable_fd);
1115 stable_fd = -1;
1116 }
1117 }
1118
1119 /* Open and stat the backup stable restart file. */
1120 if (stable_fd >= 0) {
1121 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR, 0);
1122 if (backup_fd < 0)
1123 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR | O_CREAT,
1124 0600);
1125 if (backup_fd >= 0) {
1126 ret = fstat(backup_fd, &backup_st);
1127 if (ret < 0) {
1128 close(backup_fd);
1129 backup_fd = -1;
1130 }
1131 }
1132 if (backup_fd < 0) {
1133 close(stable_fd);
1134 stable_fd = -1;
1135 }
1136 }
1137
1138 *stable_fdp = stable_fd;
1139 *backup_fdp = backup_fd;
1140 if (stable_fd < 0)
1141 return;
1142
1143 /* Sync up the 2 files, as required. */
1144 if (st.st_size > 0)
1145 copy_stable(stable_fd, backup_fd);
1146 else if (backup_st.st_size > 0)
1147 copy_stable(backup_fd, stable_fd);
1148 }
1149
1150 /*
1151 * Copy the stable restart file to the backup or vice versa.
1152 */
1153 static void
copy_stable(int from_fd,int to_fd)1154 copy_stable(int from_fd, int to_fd)
1155 {
1156 int cnt, ret;
1157 static char buf[1024];
1158
1159 ret = lseek(from_fd, (off_t)0, SEEK_SET);
1160 if (ret >= 0)
1161 ret = lseek(to_fd, (off_t)0, SEEK_SET);
1162 if (ret >= 0)
1163 ret = ftruncate(to_fd, (off_t)0);
1164 if (ret >= 0)
1165 do {
1166 cnt = read(from_fd, buf, 1024);
1167 if (cnt > 0)
1168 ret = write(to_fd, buf, cnt);
1169 else if (cnt < 0)
1170 ret = cnt;
1171 } while (cnt > 0 && ret >= 0);
1172 if (ret >= 0)
1173 ret = fsync(to_fd);
1174 if (ret < 0)
1175 syslog(LOG_ERR, "stable restart copy failure: %m");
1176 }
1177
1178 /*
1179 * Back up the stable restart file when indicated by the kernel.
1180 */
1181 static void
backup_stable(__unused int signo)1182 backup_stable(__unused int signo)
1183 {
1184
1185 if (stablefd >= 0)
1186 copy_stable(stablefd, backupfd);
1187 }
1188
1189 /*
1190 * Parse the pNFS string and extract the DS servers and ports numbers.
1191 */
1192 static void
parse_dsserver(const char * optionarg,struct nfsd_nfsd_args * nfsdargp)1193 parse_dsserver(const char *optionarg, struct nfsd_nfsd_args *nfsdargp)
1194 {
1195 char *cp, *cp2, *dsaddr, *dshost, *dspath, *dsvol, nfsprt[9];
1196 char *mdspath, *mdsp, ip6[INET6_ADDRSTRLEN];
1197 const char *ad;
1198 int ecode;
1199 u_int adsiz, dsaddrcnt, dshostcnt, dspathcnt, hostsiz, pathsiz;
1200 u_int mdspathcnt;
1201 size_t dsaddrsiz, dshostsiz, dspathsiz, nfsprtsiz, mdspathsiz;
1202 struct addrinfo hints, *ai_tcp, *res;
1203 struct sockaddr_in sin;
1204 struct sockaddr_in6 sin6;
1205
1206 cp = strdup(optionarg);
1207 if (cp == NULL)
1208 errx(1, "Out of memory");
1209
1210 /* Now, do the host names. */
1211 dspathsiz = 1024;
1212 dspathcnt = 0;
1213 dspath = malloc(dspathsiz);
1214 if (dspath == NULL)
1215 errx(1, "Out of memory");
1216 dshostsiz = 1024;
1217 dshostcnt = 0;
1218 dshost = malloc(dshostsiz);
1219 if (dshost == NULL)
1220 errx(1, "Out of memory");
1221 dsaddrsiz = 1024;
1222 dsaddrcnt = 0;
1223 dsaddr = malloc(dsaddrsiz);
1224 if (dsaddr == NULL)
1225 errx(1, "Out of memory");
1226 mdspathsiz = 1024;
1227 mdspathcnt = 0;
1228 mdspath = malloc(mdspathsiz);
1229 if (mdspath == NULL)
1230 errx(1, "Out of memory");
1231
1232 /* Put the NFS port# in "." form. */
1233 snprintf(nfsprt, 9, ".%d.%d", 2049 >> 8, 2049 & 0xff);
1234 nfsprtsiz = strlen(nfsprt);
1235
1236 ai_tcp = NULL;
1237 /* Loop around for each DS server name. */
1238 do {
1239 cp2 = strchr(cp, ',');
1240 if (cp2 != NULL) {
1241 /* Not the last DS in the list. */
1242 *cp2++ = '\0';
1243 if (*cp2 == '\0')
1244 usage();
1245 }
1246
1247 dsvol = strchr(cp, ':');
1248 if (dsvol == NULL || *(dsvol + 1) == '\0')
1249 usage();
1250 *dsvol++ = '\0';
1251
1252 /* Optional path for MDS file system to be stored on DS. */
1253 mdsp = strchr(dsvol, '#');
1254 if (mdsp != NULL) {
1255 if (*(mdsp + 1) == '\0' || mdsp <= dsvol)
1256 usage();
1257 *mdsp++ = '\0';
1258 }
1259
1260 /* Append this pathname to dspath. */
1261 pathsiz = strlen(dsvol);
1262 if (dspathcnt + pathsiz + 1 > dspathsiz) {
1263 dspathsiz *= 2;
1264 dspath = realloc(dspath, dspathsiz);
1265 if (dspath == NULL)
1266 errx(1, "Out of memory");
1267 }
1268 strcpy(&dspath[dspathcnt], dsvol);
1269 dspathcnt += pathsiz + 1;
1270
1271 /* Append this pathname to mdspath. */
1272 if (mdsp != NULL)
1273 pathsiz = strlen(mdsp);
1274 else
1275 pathsiz = 0;
1276 if (mdspathcnt + pathsiz + 1 > mdspathsiz) {
1277 mdspathsiz *= 2;
1278 mdspath = realloc(mdspath, mdspathsiz);
1279 if (mdspath == NULL)
1280 errx(1, "Out of memory");
1281 }
1282 if (mdsp != NULL)
1283 strcpy(&mdspath[mdspathcnt], mdsp);
1284 else
1285 mdspath[mdspathcnt] = '\0';
1286 mdspathcnt += pathsiz + 1;
1287
1288 if (ai_tcp != NULL)
1289 freeaddrinfo(ai_tcp);
1290
1291 /* Get the fully qualified domain name and IP address. */
1292 memset(&hints, 0, sizeof(hints));
1293 hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
1294 hints.ai_family = PF_UNSPEC;
1295 hints.ai_socktype = SOCK_STREAM;
1296 hints.ai_protocol = IPPROTO_TCP;
1297 ecode = getaddrinfo(cp, NULL, &hints, &ai_tcp);
1298 if (ecode != 0)
1299 err(1, "getaddrinfo pnfs: %s %s", cp,
1300 gai_strerror(ecode));
1301 ad = NULL;
1302 for (res = ai_tcp; res != NULL; res = res->ai_next) {
1303 if (res->ai_addr->sa_family == AF_INET) {
1304 if (res->ai_addrlen < sizeof(sin))
1305 err(1, "getaddrinfo() returned "
1306 "undersized IPv4 address");
1307 /*
1308 * Mips cares about sockaddr_in alignment,
1309 * so copy the address.
1310 */
1311 memcpy(&sin, res->ai_addr, sizeof(sin));
1312 ad = inet_ntoa(sin.sin_addr);
1313 break;
1314 } else if (res->ai_family == AF_INET6) {
1315 if (res->ai_addrlen < sizeof(sin6))
1316 err(1, "getaddrinfo() returned "
1317 "undersized IPv6 address");
1318 /*
1319 * Mips cares about sockaddr_in6 alignment,
1320 * so copy the address.
1321 */
1322 memcpy(&sin6, res->ai_addr, sizeof(sin6));
1323 ad = inet_ntop(AF_INET6, &sin6.sin6_addr, ip6,
1324 sizeof(ip6));
1325
1326 /*
1327 * XXX
1328 * Since a link local address will only
1329 * work if the client and DS are in the
1330 * same scope zone, only use it if it is
1331 * the only address.
1332 */
1333 if (ad != NULL &&
1334 !IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr))
1335 break;
1336 }
1337 }
1338 if (ad == NULL)
1339 err(1, "No IP address for %s", cp);
1340
1341 /* Append this address to dsaddr. */
1342 adsiz = strlen(ad);
1343 if (dsaddrcnt + adsiz + nfsprtsiz + 1 > dsaddrsiz) {
1344 dsaddrsiz *= 2;
1345 dsaddr = realloc(dsaddr, dsaddrsiz);
1346 if (dsaddr == NULL)
1347 errx(1, "Out of memory");
1348 }
1349 strcpy(&dsaddr[dsaddrcnt], ad);
1350 strcat(&dsaddr[dsaddrcnt], nfsprt);
1351 dsaddrcnt += adsiz + nfsprtsiz + 1;
1352
1353 /* Append this hostname to dshost. */
1354 hostsiz = strlen(ai_tcp->ai_canonname);
1355 if (dshostcnt + hostsiz + 1 > dshostsiz) {
1356 dshostsiz *= 2;
1357 dshost = realloc(dshost, dshostsiz);
1358 if (dshost == NULL)
1359 errx(1, "Out of memory");
1360 }
1361 strcpy(&dshost[dshostcnt], ai_tcp->ai_canonname);
1362 dshostcnt += hostsiz + 1;
1363
1364 cp = cp2;
1365 } while (cp != NULL);
1366
1367 nfsdargp->addr = dsaddr;
1368 nfsdargp->addrlen = dsaddrcnt;
1369 nfsdargp->dnshost = dshost;
1370 nfsdargp->dnshostlen = dshostcnt;
1371 nfsdargp->dspath = dspath;
1372 nfsdargp->dspathlen = dspathcnt;
1373 nfsdargp->mdspath = mdspath;
1374 nfsdargp->mdspathlen = mdspathcnt;
1375 freeaddrinfo(ai_tcp);
1376 }
1377
1378