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 #ifndef lint
36 static const char copyright[] =
37 "@(#) Copyright (c) 1989, 1993, 1994\n\
38 The Regents of the University of California. All rights reserved.\n";
39 #endif /* not lint */
40
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)nfsd.c 8.9 (Berkeley) 3/29/95";
44 #endif
45 #endif /* not lint */
46
47 #include <sys/param.h>
48 #include <sys/syslog.h>
49 #include <sys/wait.h>
50 #include <sys/mount.h>
51 #include <sys/fcntl.h>
52 #include <sys/linker.h>
53 #include <sys/module.h>
54 #include <sys/types.h>
55 #include <sys/stat.h>
56 #include <sys/sysctl.h>
57 #include <sys/ucred.h>
58
59 #include <rpc/rpc.h>
60 #include <rpc/pmap_clnt.h>
61 #include <rpcsvc/nfs_prot.h>
62
63 #include <netdb.h>
64 #include <arpa/inet.h>
65 #include <nfs/nfssvc.h>
66
67 #include <fs/nfs/nfsproto.h>
68 #include <fs/nfs/nfskpiport.h>
69 #include <fs/nfs/nfs.h>
70
71 #include <err.h>
72 #include <errno.h>
73 #include <signal.h>
74 #include <stdio.h>
75 #include <stdlib.h>
76 #include <string.h>
77 #include <unistd.h>
78 #include <sysexits.h>
79
80 #include <getopt.h>
81
82 static int debug = 0;
83
84 #define NFSD_STABLERESTART "/var/db/nfs-stablerestart"
85 #define NFSD_STABLEBACKUP "/var/db/nfs-stablerestart.bak"
86 #define MAXNFSDCNT 256
87 #define DEFNFSDCNT 4
88 #define NFS_VER2 2
89 #define NFS_VER3 3
90 #define NFS_VER4 4
91 static pid_t children[MAXNFSDCNT]; /* PIDs of children */
92 static pid_t masterpid; /* PID of master/parent */
93 static int nfsdcnt; /* number of children */
94 static int nfsdcnt_set;
95 static int minthreads;
96 static int maxthreads;
97 static int nfssvc_nfsd; /* Set to correct NFSSVC_xxx flag */
98 static int stablefd = -1; /* Fd for the stable restart file */
99 static int backupfd; /* Fd for the backup stable restart file */
100 static const char *getopt_shortopts;
101 static const char *getopt_usage;
102 static int nfs_minvers = NFS_VER2;
103
104 static int minthreads_set;
105 static int maxthreads_set;
106
107 static struct option longopts[] = {
108 { "debug", no_argument, &debug, 1 },
109 { "minthreads", required_argument, &minthreads_set, 1 },
110 { "maxthreads", required_argument, &maxthreads_set, 1 },
111 { "pnfs", required_argument, NULL, 'p' },
112 { "mirror", required_argument, NULL, 'm' },
113 { NULL, 0, NULL, 0}
114 };
115
116 static void cleanup(int);
117 static void child_cleanup(int);
118 static void killchildren(void);
119 static void nfsd_exit(int);
120 static void nonfs(int);
121 static void reapchild(int);
122 static int setbindhost(struct addrinfo **ia, const char *bindhost,
123 struct addrinfo hints);
124 static void start_server(int, struct nfsd_nfsd_args *, const char *vhost);
125 static void unregistration(void);
126 static void usage(void);
127 static void open_stable(int *, int *);
128 static void copy_stable(int, int);
129 static void backup_stable(int);
130 static void set_nfsdcnt(int);
131 static void parse_dsserver(const char *, struct nfsd_nfsd_args *);
132
133 /*
134 * Nfs server daemon mostly just a user context for nfssvc()
135 *
136 * 1 - do file descriptor and signal cleanup
137 * 2 - fork the nfsd(s)
138 * 3 - create server socket(s)
139 * 4 - register socket with rpcbind
140 *
141 * For connectionless protocols, just pass the socket into the kernel via.
142 * nfssvc().
143 * For connection based sockets, loop doing accepts. When you get a new
144 * socket from accept, pass the msgsock into the kernel via. nfssvc().
145 * The arguments are:
146 * -r - reregister with rpcbind
147 * -d - unregister with rpcbind
148 * -t - support tcp nfs clients
149 * -u - support udp nfs clients
150 * -e - forces it to run a server that supports nfsv4
151 * -p - enable a pNFS service
152 * -m - set the mirroring level for a pNFS service
153 * followed by "n" which is the number of nfsds' to fork off
154 */
155 int
main(int argc,char ** argv)156 main(int argc, char **argv)
157 {
158 struct nfsd_addsock_args addsockargs;
159 struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints;
160 struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6;
161 struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6;
162 struct sockaddr_storage peer;
163 fd_set ready, sockbits;
164 int ch, connect_type_cnt, i, maxsock, msgsock;
165 socklen_t len;
166 int on = 1, unregister, reregister, sock;
167 int tcp6sock, ip6flag, tcpflag, tcpsock;
168 int udpflag, ecode, error, s;
169 int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
170 int nfssvc_addsock;
171 int jailed, longindex = 0;
172 size_t jailed_size, nfs_minvers_size;
173 const char *lopt;
174 char **bindhost = NULL;
175 pid_t pid;
176 struct nfsd_nfsd_args nfsdargs;
177 const char *vhostname = NULL;
178
179 nfsdargs.mirrorcnt = 1;
180 nfsdargs.addr = NULL;
181 nfsdargs.addrlen = 0;
182 nfsdcnt = DEFNFSDCNT;
183 unregister = reregister = tcpflag = maxsock = 0;
184 bindanyflag = udpflag = connect_type_cnt = bindhostc = 0;
185 getopt_shortopts = "ah:n:rdtuep:m:V:";
186 getopt_usage =
187 "usage:\n"
188 " nfsd [-ardtue] [-h bindip]\n"
189 " [-n numservers] [--minthreads #] [--maxthreads #]\n"
190 " [-p/--pnfs dsserver0:/dsserver0-mounted-on-dir,...,"
191 "dsserverN:/dsserverN-mounted-on-dir] [-m mirrorlevel]\n"
192 " [-V virtual_hostname]\n";
193 while ((ch = getopt_long(argc, argv, getopt_shortopts, longopts,
194 &longindex)) != -1)
195 switch (ch) {
196 case 'V':
197 if (strlen(optarg) <= MAXHOSTNAMELEN)
198 vhostname = optarg;
199 else
200 warnx("Virtual host name (%s) is too long",
201 optarg);
202 break;
203 case 'a':
204 bindanyflag = 1;
205 break;
206 case 'n':
207 set_nfsdcnt(atoi(optarg));
208 break;
209 case 'h':
210 bindhostc++;
211 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
212 if (bindhost == NULL)
213 errx(1, "Out of memory");
214 bindhost[bindhostc-1] = strdup(optarg);
215 if (bindhost[bindhostc-1] == NULL)
216 errx(1, "Out of memory");
217 break;
218 case 'r':
219 reregister = 1;
220 break;
221 case 'd':
222 unregister = 1;
223 break;
224 case 't':
225 tcpflag = 1;
226 break;
227 case 'u':
228 udpflag = 1;
229 break;
230 case 'e':
231 /* now a no-op, since this is the default */
232 break;
233 case 'p':
234 /* Parse out the DS server host names and mount pts. */
235 parse_dsserver(optarg, &nfsdargs);
236 break;
237 case 'm':
238 /* Set the mirror level for a pNFS service. */
239 i = atoi(optarg);
240 if (i < 2 || i > NFSDEV_MAXMIRRORS)
241 errx(1, "Mirror level out of range 2<-->%d",
242 NFSDEV_MAXMIRRORS);
243 nfsdargs.mirrorcnt = i;
244 break;
245 case 0:
246 lopt = longopts[longindex].name;
247 if (!strcmp(lopt, "minthreads")) {
248 minthreads = atoi(optarg);
249 } else if (!strcmp(lopt, "maxthreads")) {
250 maxthreads = atoi(optarg);
251 }
252 break;
253 default:
254 case '?':
255 usage();
256 }
257 if (!tcpflag && !udpflag)
258 udpflag = 1;
259 argv += optind;
260 argc -= optind;
261 if (minthreads_set && maxthreads_set && minthreads > maxthreads)
262 errx(EX_USAGE,
263 "error: minthreads(%d) can't be greater than "
264 "maxthreads(%d)", minthreads, maxthreads);
265
266 /*
267 * XXX
268 * Backward compatibility, trailing number is the count of daemons.
269 */
270 if (argc > 1)
271 usage();
272 if (argc == 1)
273 set_nfsdcnt(atoi(argv[0]));
274
275 /*
276 * Unless the "-o" option was specified, try and run "nfsd".
277 * If "-o" was specified, try and run "nfsserver".
278 */
279 if (modfind("nfsd") < 0) {
280 /* Not present in kernel, try loading it */
281 if (kldload("nfsd") < 0 || modfind("nfsd") < 0)
282 errx(1, "NFS server is not available");
283 }
284
285 ip6flag = 1;
286 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
287 if (s == -1) {
288 if (errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT)
289 err(1, "socket");
290 ip6flag = 0;
291 } else if (getnetconfigent("udp6") == NULL ||
292 getnetconfigent("tcp6") == NULL) {
293 ip6flag = 0;
294 }
295 if (s != -1)
296 close(s);
297
298 if (bindhostc == 0 || bindanyflag) {
299 bindhostc++;
300 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
301 if (bindhost == NULL)
302 errx(1, "Out of memory");
303 bindhost[bindhostc-1] = strdup("*");
304 if (bindhost[bindhostc-1] == NULL)
305 errx(1, "Out of memory");
306 }
307
308 if (unregister) {
309 /*
310 * Unregister before setting nfs_minvers, in case the
311 * value of vfs.nfsd.server_min_nfsvers has changed
312 * since registering with rpcbind.
313 */
314 unregistration();
315 exit (0);
316 }
317
318 nfs_minvers_size = sizeof(nfs_minvers);
319 error = sysctlbyname("vfs.nfsd.server_min_nfsvers", &nfs_minvers,
320 &nfs_minvers_size, NULL, 0);
321 if (error != 0 || nfs_minvers < NFS_VER2 || nfs_minvers > NFS_VER4) {
322 warnx("sysctlbyname(vfs.nfsd.server_min_nfsvers) failed,"
323 " defaulting to NFSv2");
324 nfs_minvers = NFS_VER2;
325 }
326
327 if (reregister) {
328 if (udpflag) {
329 memset(&hints, 0, sizeof hints);
330 hints.ai_flags = AI_PASSIVE;
331 hints.ai_family = AF_INET;
332 hints.ai_socktype = SOCK_DGRAM;
333 hints.ai_protocol = IPPROTO_UDP;
334 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
335 if (ecode != 0)
336 err(1, "getaddrinfo udp: %s", gai_strerror(ecode));
337 nconf_udp = getnetconfigent("udp");
338 if (nconf_udp == NULL)
339 err(1, "getnetconfigent udp failed");
340 nb_udp.buf = ai_udp->ai_addr;
341 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
342 if (nfs_minvers == NFS_VER2)
343 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp,
344 &nb_udp))
345 err(1, "rpcb_set udp failed");
346 if (nfs_minvers <= NFS_VER3)
347 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp,
348 &nb_udp))
349 err(1, "rpcb_set udp failed");
350 freeaddrinfo(ai_udp);
351 }
352 if (udpflag && ip6flag) {
353 memset(&hints, 0, sizeof hints);
354 hints.ai_flags = AI_PASSIVE;
355 hints.ai_family = AF_INET6;
356 hints.ai_socktype = SOCK_DGRAM;
357 hints.ai_protocol = IPPROTO_UDP;
358 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
359 if (ecode != 0)
360 err(1, "getaddrinfo udp6: %s", gai_strerror(ecode));
361 nconf_udp6 = getnetconfigent("udp6");
362 if (nconf_udp6 == NULL)
363 err(1, "getnetconfigent udp6 failed");
364 nb_udp6.buf = ai_udp6->ai_addr;
365 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
366 if (nfs_minvers == NFS_VER2)
367 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6,
368 &nb_udp6))
369 err(1, "rpcb_set udp6 failed");
370 if (nfs_minvers <= NFS_VER3)
371 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6,
372 &nb_udp6))
373 err(1, "rpcb_set udp6 failed");
374 freeaddrinfo(ai_udp6);
375 }
376 if (tcpflag) {
377 memset(&hints, 0, sizeof hints);
378 hints.ai_flags = AI_PASSIVE;
379 hints.ai_family = AF_INET;
380 hints.ai_socktype = SOCK_STREAM;
381 hints.ai_protocol = IPPROTO_TCP;
382 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp);
383 if (ecode != 0)
384 err(1, "getaddrinfo tcp: %s", gai_strerror(ecode));
385 nconf_tcp = getnetconfigent("tcp");
386 if (nconf_tcp == NULL)
387 err(1, "getnetconfigent tcp failed");
388 nb_tcp.buf = ai_tcp->ai_addr;
389 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
390 if (nfs_minvers == NFS_VER2)
391 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp,
392 &nb_tcp))
393 err(1, "rpcb_set tcp failed");
394 if (nfs_minvers <= NFS_VER3)
395 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp,
396 &nb_tcp))
397 err(1, "rpcb_set tcp failed");
398 freeaddrinfo(ai_tcp);
399 }
400 if (tcpflag && ip6flag) {
401 memset(&hints, 0, sizeof hints);
402 hints.ai_flags = AI_PASSIVE;
403 hints.ai_family = AF_INET6;
404 hints.ai_socktype = SOCK_STREAM;
405 hints.ai_protocol = IPPROTO_TCP;
406 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
407 if (ecode != 0)
408 err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode));
409 nconf_tcp6 = getnetconfigent("tcp6");
410 if (nconf_tcp6 == NULL)
411 err(1, "getnetconfigent tcp6 failed");
412 nb_tcp6.buf = ai_tcp6->ai_addr;
413 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
414 if (nfs_minvers == NFS_VER2)
415 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6,
416 &nb_tcp6))
417 err(1, "rpcb_set tcp6 failed");
418 if (nfs_minvers <= NFS_VER3)
419 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6,
420 &nb_tcp6))
421 err(1, "rpcb_set tcp6 failed");
422 freeaddrinfo(ai_tcp6);
423 }
424 exit (0);
425 }
426 if (debug == 0) {
427 daemon(0, 0);
428 (void)signal(SIGHUP, SIG_IGN);
429 (void)signal(SIGINT, SIG_IGN);
430 /*
431 * nfsd sits in the kernel most of the time. It needs
432 * to ignore SIGTERM/SIGQUIT in order to stay alive as long
433 * as possible during a shutdown, otherwise loopback
434 * mounts will not be able to unmount.
435 */
436 (void)signal(SIGTERM, SIG_IGN);
437 (void)signal(SIGQUIT, SIG_IGN);
438 }
439 (void)signal(SIGSYS, nonfs);
440 (void)signal(SIGCHLD, reapchild);
441 (void)signal(SIGUSR2, backup_stable);
442
443 openlog("nfsd", LOG_PID | (debug ? LOG_PERROR : 0), LOG_DAEMON);
444
445 /*
446 * For V4, we open the stablerestart file and call nfssvc()
447 * to get it loaded. This is done before the daemons do the
448 * regular nfssvc() call to service NFS requests.
449 * (This way the file remains open until the last nfsd is killed
450 * off.)
451 * It and the backup copy will be created as empty files
452 * the first time this nfsd is started and should never be
453 * deleted/replaced if at all possible. It should live on a
454 * local, non-volatile storage device that does not do hardware
455 * level write-back caching. (See SCSI doc for more information
456 * on how to prevent write-back caching on SCSI disks.)
457 */
458 open_stable(&stablefd, &backupfd);
459 if (stablefd < 0) {
460 syslog(LOG_ERR, "Can't open %s: %m\n", NFSD_STABLERESTART);
461 exit(1);
462 }
463 /* This system call will fail for old kernels, but that's ok. */
464 nfssvc(NFSSVC_BACKUPSTABLE, NULL);
465 if (nfssvc(NFSSVC_STABLERESTART, (caddr_t)&stablefd) < 0) {
466 if (errno == EPERM) {
467 jailed = 0;
468 jailed_size = sizeof(jailed);
469 sysctlbyname("security.jail.jailed", &jailed,
470 &jailed_size, NULL, 0);
471 if (jailed != 0)
472 syslog(LOG_ERR, "nfssvc stablerestart failed: "
473 "allow.nfsd might not be configured");
474 else
475 syslog(LOG_ERR, "nfssvc stablerestart failed");
476 } else if (errno == ENXIO)
477 syslog(LOG_ERR, "nfssvc stablerestart failed: is nfsd "
478 "already running?");
479 else
480 syslog(LOG_ERR, "Can't read stable storage file: %m\n");
481 exit(1);
482 }
483 nfssvc_addsock = NFSSVC_NFSDADDSOCK;
484 nfssvc_nfsd = NFSSVC_NFSDNFSD | NFSSVC_NEWSTRUCT;
485
486 if (tcpflag) {
487 /*
488 * For TCP mode, we fork once to start the first
489 * kernel nfsd thread. The kernel will add more
490 * threads as needed.
491 */
492 masterpid = getpid();
493 pid = fork();
494 if (pid == -1) {
495 syslog(LOG_ERR, "fork: %m");
496 nfsd_exit(1);
497 }
498 if (pid) {
499 children[0] = pid;
500 } else {
501 (void)signal(SIGUSR1, child_cleanup);
502 setproctitle("server");
503 start_server(0, &nfsdargs, vhostname);
504 }
505 }
506
507 (void)signal(SIGUSR1, cleanup);
508 FD_ZERO(&sockbits);
509
510 rpcbregcnt = 0;
511 /* Set up the socket for udp and rpcb register it. */
512 if (udpflag) {
513 rpcbreg = 0;
514 for (i = 0; i < bindhostc; i++) {
515 memset(&hints, 0, sizeof hints);
516 hints.ai_flags = AI_PASSIVE;
517 hints.ai_family = AF_INET;
518 hints.ai_socktype = SOCK_DGRAM;
519 hints.ai_protocol = IPPROTO_UDP;
520 if (setbindhost(&ai_udp, bindhost[i], hints) == 0) {
521 rpcbreg = 1;
522 rpcbregcnt++;
523 if ((sock = socket(ai_udp->ai_family,
524 ai_udp->ai_socktype,
525 ai_udp->ai_protocol)) < 0) {
526 syslog(LOG_ERR,
527 "can't create udp socket");
528 nfsd_exit(1);
529 }
530 if (bind(sock, ai_udp->ai_addr,
531 ai_udp->ai_addrlen) < 0) {
532 syslog(LOG_ERR,
533 "can't bind udp addr %s: %m",
534 bindhost[i]);
535 nfsd_exit(1);
536 }
537 freeaddrinfo(ai_udp);
538 addsockargs.sock = sock;
539 addsockargs.name = NULL;
540 addsockargs.namelen = 0;
541 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
542 syslog(LOG_ERR, "can't Add UDP socket");
543 nfsd_exit(1);
544 }
545 (void)close(sock);
546 }
547 }
548 if (rpcbreg == 1) {
549 memset(&hints, 0, sizeof hints);
550 hints.ai_flags = AI_PASSIVE;
551 hints.ai_family = AF_INET;
552 hints.ai_socktype = SOCK_DGRAM;
553 hints.ai_protocol = IPPROTO_UDP;
554 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
555 if (ecode != 0) {
556 syslog(LOG_ERR, "getaddrinfo udp: %s",
557 gai_strerror(ecode));
558 nfsd_exit(1);
559 }
560 nconf_udp = getnetconfigent("udp");
561 if (nconf_udp == NULL) {
562 syslog(LOG_ERR, "getnetconfigent udp failed");
563 nfsd_exit(1);
564 }
565 nb_udp.buf = ai_udp->ai_addr;
566 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
567 if (nfs_minvers == NFS_VER2)
568 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp,
569 &nb_udp)) {
570 syslog(LOG_ERR, "rpcb_set udp failed");
571 nfsd_exit(1);
572 }
573 if (nfs_minvers <= NFS_VER3)
574 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp,
575 &nb_udp)) {
576 syslog(LOG_ERR, "rpcb_set udp failed");
577 nfsd_exit(1);
578 }
579 freeaddrinfo(ai_udp);
580 }
581 }
582
583 /* Set up the socket for udp6 and rpcb register it. */
584 if (udpflag && ip6flag) {
585 rpcbreg = 0;
586 for (i = 0; i < bindhostc; i++) {
587 memset(&hints, 0, sizeof hints);
588 hints.ai_flags = AI_PASSIVE;
589 hints.ai_family = AF_INET6;
590 hints.ai_socktype = SOCK_DGRAM;
591 hints.ai_protocol = IPPROTO_UDP;
592 if (setbindhost(&ai_udp6, bindhost[i], hints) == 0) {
593 rpcbreg = 1;
594 rpcbregcnt++;
595 if ((sock = socket(ai_udp6->ai_family,
596 ai_udp6->ai_socktype,
597 ai_udp6->ai_protocol)) < 0) {
598 syslog(LOG_ERR,
599 "can't create udp6 socket");
600 nfsd_exit(1);
601 }
602 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
603 &on, sizeof on) < 0) {
604 syslog(LOG_ERR,
605 "can't set v6-only binding for "
606 "udp6 socket: %m");
607 nfsd_exit(1);
608 }
609 if (bind(sock, ai_udp6->ai_addr,
610 ai_udp6->ai_addrlen) < 0) {
611 syslog(LOG_ERR,
612 "can't bind udp6 addr %s: %m",
613 bindhost[i]);
614 nfsd_exit(1);
615 }
616 freeaddrinfo(ai_udp6);
617 addsockargs.sock = sock;
618 addsockargs.name = NULL;
619 addsockargs.namelen = 0;
620 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
621 syslog(LOG_ERR,
622 "can't add UDP6 socket");
623 nfsd_exit(1);
624 }
625 (void)close(sock);
626 }
627 }
628 if (rpcbreg == 1) {
629 memset(&hints, 0, sizeof hints);
630 hints.ai_flags = AI_PASSIVE;
631 hints.ai_family = AF_INET6;
632 hints.ai_socktype = SOCK_DGRAM;
633 hints.ai_protocol = IPPROTO_UDP;
634 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
635 if (ecode != 0) {
636 syslog(LOG_ERR, "getaddrinfo udp6: %s",
637 gai_strerror(ecode));
638 nfsd_exit(1);
639 }
640 nconf_udp6 = getnetconfigent("udp6");
641 if (nconf_udp6 == NULL) {
642 syslog(LOG_ERR, "getnetconfigent udp6 failed");
643 nfsd_exit(1);
644 }
645 nb_udp6.buf = ai_udp6->ai_addr;
646 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
647 if (nfs_minvers == NFS_VER2)
648 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6,
649 &nb_udp6)) {
650 syslog(LOG_ERR,
651 "rpcb_set udp6 failed");
652 nfsd_exit(1);
653 }
654 if (nfs_minvers <= NFS_VER3)
655 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6,
656 &nb_udp6)) {
657 syslog(LOG_ERR,
658 "rpcb_set udp6 failed");
659 nfsd_exit(1);
660 }
661 freeaddrinfo(ai_udp6);
662 }
663 }
664
665 /* Set up the socket for tcp and rpcb register it. */
666 if (tcpflag) {
667 rpcbreg = 0;
668 for (i = 0; i < bindhostc; i++) {
669 memset(&hints, 0, sizeof hints);
670 hints.ai_flags = AI_PASSIVE;
671 hints.ai_family = AF_INET;
672 hints.ai_socktype = SOCK_STREAM;
673 hints.ai_protocol = IPPROTO_TCP;
674 if (setbindhost(&ai_tcp, bindhost[i], hints) == 0) {
675 rpcbreg = 1;
676 rpcbregcnt++;
677 if ((tcpsock = socket(AF_INET, SOCK_STREAM,
678 0)) < 0) {
679 syslog(LOG_ERR,
680 "can't create tcp socket");
681 nfsd_exit(1);
682 }
683 if (setsockopt(tcpsock, SOL_SOCKET,
684 SO_REUSEADDR,
685 (char *)&on, sizeof(on)) < 0)
686 syslog(LOG_ERR,
687 "setsockopt SO_REUSEADDR: %m");
688 if (bind(tcpsock, ai_tcp->ai_addr,
689 ai_tcp->ai_addrlen) < 0) {
690 syslog(LOG_ERR,
691 "can't bind tcp addr %s: %m",
692 bindhost[i]);
693 nfsd_exit(1);
694 }
695 if (listen(tcpsock, -1) < 0) {
696 syslog(LOG_ERR, "listen failed");
697 nfsd_exit(1);
698 }
699 freeaddrinfo(ai_tcp);
700 FD_SET(tcpsock, &sockbits);
701 maxsock = tcpsock;
702 connect_type_cnt++;
703 }
704 }
705 if (rpcbreg == 1) {
706 memset(&hints, 0, sizeof hints);
707 hints.ai_flags = AI_PASSIVE;
708 hints.ai_family = AF_INET;
709 hints.ai_socktype = SOCK_STREAM;
710 hints.ai_protocol = IPPROTO_TCP;
711 ecode = getaddrinfo(NULL, "nfs", &hints,
712 &ai_tcp);
713 if (ecode != 0) {
714 syslog(LOG_ERR, "getaddrinfo tcp: %s",
715 gai_strerror(ecode));
716 nfsd_exit(1);
717 }
718 nconf_tcp = getnetconfigent("tcp");
719 if (nconf_tcp == NULL) {
720 syslog(LOG_ERR, "getnetconfigent tcp failed");
721 nfsd_exit(1);
722 }
723 nb_tcp.buf = ai_tcp->ai_addr;
724 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
725 if (nfs_minvers == NFS_VER2)
726 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp,
727 &nb_tcp)) {
728 syslog(LOG_ERR, "rpcb_set tcp failed");
729 nfsd_exit(1);
730 }
731 if (nfs_minvers <= NFS_VER3)
732 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp,
733 &nb_tcp)) {
734 syslog(LOG_ERR, "rpcb_set tcp failed");
735 nfsd_exit(1);
736 }
737 freeaddrinfo(ai_tcp);
738 }
739 }
740
741 /* Set up the socket for tcp6 and rpcb register it. */
742 if (tcpflag && ip6flag) {
743 rpcbreg = 0;
744 for (i = 0; i < bindhostc; i++) {
745 memset(&hints, 0, sizeof hints);
746 hints.ai_flags = AI_PASSIVE;
747 hints.ai_family = AF_INET6;
748 hints.ai_socktype = SOCK_STREAM;
749 hints.ai_protocol = IPPROTO_TCP;
750 if (setbindhost(&ai_tcp6, bindhost[i], hints) == 0) {
751 rpcbreg = 1;
752 rpcbregcnt++;
753 if ((tcp6sock = socket(ai_tcp6->ai_family,
754 ai_tcp6->ai_socktype,
755 ai_tcp6->ai_protocol)) < 0) {
756 syslog(LOG_ERR,
757 "can't create tcp6 socket");
758 nfsd_exit(1);
759 }
760 if (setsockopt(tcp6sock, SOL_SOCKET,
761 SO_REUSEADDR,
762 (char *)&on, sizeof(on)) < 0)
763 syslog(LOG_ERR,
764 "setsockopt SO_REUSEADDR: %m");
765 if (setsockopt(tcp6sock, IPPROTO_IPV6,
766 IPV6_V6ONLY, &on, sizeof on) < 0) {
767 syslog(LOG_ERR,
768 "can't set v6-only binding for tcp6 "
769 "socket: %m");
770 nfsd_exit(1);
771 }
772 if (bind(tcp6sock, ai_tcp6->ai_addr,
773 ai_tcp6->ai_addrlen) < 0) {
774 syslog(LOG_ERR,
775 "can't bind tcp6 addr %s: %m",
776 bindhost[i]);
777 nfsd_exit(1);
778 }
779 if (listen(tcp6sock, -1) < 0) {
780 syslog(LOG_ERR, "listen failed");
781 nfsd_exit(1);
782 }
783 freeaddrinfo(ai_tcp6);
784 FD_SET(tcp6sock, &sockbits);
785 if (maxsock < tcp6sock)
786 maxsock = tcp6sock;
787 connect_type_cnt++;
788 }
789 }
790 if (rpcbreg == 1) {
791 memset(&hints, 0, sizeof hints);
792 hints.ai_flags = AI_PASSIVE;
793 hints.ai_family = AF_INET6;
794 hints.ai_socktype = SOCK_STREAM;
795 hints.ai_protocol = IPPROTO_TCP;
796 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
797 if (ecode != 0) {
798 syslog(LOG_ERR, "getaddrinfo tcp6: %s",
799 gai_strerror(ecode));
800 nfsd_exit(1);
801 }
802 nconf_tcp6 = getnetconfigent("tcp6");
803 if (nconf_tcp6 == NULL) {
804 syslog(LOG_ERR, "getnetconfigent tcp6 failed");
805 nfsd_exit(1);
806 }
807 nb_tcp6.buf = ai_tcp6->ai_addr;
808 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
809 if (nfs_minvers == NFS_VER2)
810 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6,
811 &nb_tcp6)) {
812 syslog(LOG_ERR, "rpcb_set tcp6 failed");
813 nfsd_exit(1);
814 }
815 if (nfs_minvers <= NFS_VER3)
816 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6,
817 &nb_tcp6)) {
818 syslog(LOG_ERR, "rpcb_set tcp6 failed");
819 nfsd_exit(1);
820 }
821 freeaddrinfo(ai_tcp6);
822 }
823 }
824
825 if (rpcbregcnt == 0) {
826 syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
827 nfsd_exit(1);
828 }
829
830 if (tcpflag && connect_type_cnt == 0) {
831 syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
832 nfsd_exit(1);
833 }
834
835 setproctitle("master");
836 /*
837 * We always want a master to have a clean way to shut nfsd down
838 * (with unregistration): if the master is killed, it unregisters and
839 * kills all children. If we run for UDP only (and so do not have to
840 * loop waiting for accept), we instead make the parent
841 * a "server" too. start_server will not return.
842 */
843 if (!tcpflag)
844 start_server(1, &nfsdargs, vhostname);
845
846 /*
847 * Loop forever accepting connections and passing the sockets
848 * into the kernel for the mounts.
849 */
850 for (;;) {
851 ready = sockbits;
852 if (connect_type_cnt > 1) {
853 if (select(maxsock + 1,
854 &ready, NULL, NULL, NULL) < 1) {
855 error = errno;
856 if (error == EINTR)
857 continue;
858 syslog(LOG_ERR, "select failed: %m");
859 nfsd_exit(1);
860 }
861 }
862 for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
863 if (FD_ISSET(tcpsock, &ready)) {
864 len = sizeof(peer);
865 if ((msgsock = accept(tcpsock,
866 (struct sockaddr *)&peer, &len)) < 0) {
867 error = errno;
868 syslog(LOG_ERR, "accept failed: %m");
869 if (error == ECONNABORTED ||
870 error == EINTR)
871 continue;
872 nfsd_exit(1);
873 }
874 if (setsockopt(msgsock, SOL_SOCKET,
875 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
876 syslog(LOG_ERR,
877 "setsockopt SO_KEEPALIVE: %m");
878 addsockargs.sock = msgsock;
879 addsockargs.name = (caddr_t)&peer;
880 addsockargs.namelen = len;
881 nfssvc(nfssvc_addsock, &addsockargs);
882 (void)close(msgsock);
883 }
884 }
885 }
886 }
887
888 static int
setbindhost(struct addrinfo ** ai,const char * bindhost,struct addrinfo hints)889 setbindhost(struct addrinfo **ai, const char *bindhost, struct addrinfo hints)
890 {
891 int ecode;
892 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
893 const char *hostptr;
894
895 if (bindhost == NULL || strcmp("*", bindhost) == 0)
896 hostptr = NULL;
897 else
898 hostptr = bindhost;
899
900 if (hostptr != NULL) {
901 switch (hints.ai_family) {
902 case AF_INET:
903 if (inet_pton(AF_INET, hostptr, host_addr) == 1) {
904 hints.ai_flags = AI_NUMERICHOST;
905 } else {
906 if (inet_pton(AF_INET6, hostptr,
907 host_addr) == 1)
908 return (1);
909 }
910 break;
911 case AF_INET6:
912 if (inet_pton(AF_INET6, hostptr, host_addr) == 1) {
913 hints.ai_flags = AI_NUMERICHOST;
914 } else {
915 if (inet_pton(AF_INET, hostptr,
916 host_addr) == 1)
917 return (1);
918 }
919 break;
920 default:
921 break;
922 }
923 }
924
925 ecode = getaddrinfo(hostptr, "nfs", &hints, ai);
926 if (ecode != 0) {
927 syslog(LOG_ERR, "getaddrinfo %s: %s", bindhost,
928 gai_strerror(ecode));
929 return (1);
930 }
931 return (0);
932 }
933
934 static void
set_nfsdcnt(int proposed)935 set_nfsdcnt(int proposed)
936 {
937
938 if (proposed < 1) {
939 warnx("nfsd count too low %d; reset to %d", proposed,
940 DEFNFSDCNT);
941 nfsdcnt = DEFNFSDCNT;
942 } else if (proposed > MAXNFSDCNT) {
943 warnx("nfsd count too high %d; truncated to %d", proposed,
944 MAXNFSDCNT);
945 nfsdcnt = MAXNFSDCNT;
946 } else
947 nfsdcnt = proposed;
948 nfsdcnt_set = 1;
949 }
950
951 static void
usage(void)952 usage(void)
953 {
954 (void)fprintf(stderr, "%s", getopt_usage);
955 exit(1);
956 }
957
958 static void
nonfs(__unused int signo)959 nonfs(__unused int signo)
960 {
961 syslog(LOG_ERR, "missing system call: NFS not available");
962 }
963
964 static void
reapchild(__unused int signo)965 reapchild(__unused int signo)
966 {
967 pid_t pid;
968 int i;
969
970 while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
971 for (i = 0; i < nfsdcnt; i++)
972 if (pid == children[i])
973 children[i] = -1;
974 }
975 }
976
977 static void
unregistration(void)978 unregistration(void)
979 {
980 if ((nfs_minvers == NFS_VER2 && !rpcb_unset(NFS_PROGRAM, 2, NULL)) ||
981 (nfs_minvers <= NFS_VER3 && !rpcb_unset(NFS_PROGRAM, 3, NULL)))
982 syslog(LOG_ERR, "rpcb_unset failed");
983 }
984
985 static void
killchildren(void)986 killchildren(void)
987 {
988 int i;
989
990 for (i = 0; i < nfsdcnt; i++) {
991 if (children[i] > 0)
992 kill(children[i], SIGKILL);
993 }
994 }
995
996 /*
997 * Cleanup master after SIGUSR1.
998 */
999 static void
cleanup(__unused int signo)1000 cleanup(__unused int signo)
1001 {
1002 nfsd_exit(0);
1003 }
1004
1005 /*
1006 * Cleanup child after SIGUSR1.
1007 */
1008 static void
child_cleanup(__unused int signo)1009 child_cleanup(__unused int signo)
1010 {
1011 exit(0);
1012 }
1013
1014 static void
nfsd_exit(int status)1015 nfsd_exit(int status)
1016 {
1017 killchildren();
1018 unregistration();
1019 exit(status);
1020 }
1021
1022 static int
get_tuned_nfsdcount(void)1023 get_tuned_nfsdcount(void)
1024 {
1025 int ncpu, error, tuned_nfsdcnt;
1026 size_t ncpu_size;
1027
1028 ncpu_size = sizeof(ncpu);
1029 error = sysctlbyname("hw.ncpu", &ncpu, &ncpu_size, NULL, 0);
1030 if (error) {
1031 warnx("sysctlbyname(hw.ncpu) failed defaulting to %d nfs servers",
1032 DEFNFSDCNT);
1033 tuned_nfsdcnt = DEFNFSDCNT;
1034 } else {
1035 tuned_nfsdcnt = ncpu * 8;
1036 }
1037 return tuned_nfsdcnt;
1038 }
1039
1040 static void
start_server(int master,struct nfsd_nfsd_args * nfsdargp,const char * vhost)1041 start_server(int master, struct nfsd_nfsd_args *nfsdargp, const char *vhost)
1042 {
1043 char principal[MAXHOSTNAMELEN + 5];
1044 int status, error;
1045 char hostname[MAXHOSTNAMELEN + 1], *cp;
1046 struct addrinfo *aip, hints;
1047
1048 status = 0;
1049 if (vhost == NULL)
1050 gethostname(hostname, sizeof (hostname));
1051 else
1052 strlcpy(hostname, vhost, sizeof (hostname));
1053 snprintf(principal, sizeof (principal), "nfs@%s", hostname);
1054 if ((cp = strchr(hostname, '.')) == NULL ||
1055 *(cp + 1) == '\0') {
1056 /* If not fully qualified, try getaddrinfo() */
1057 memset((void *)&hints, 0, sizeof (hints));
1058 hints.ai_flags = AI_CANONNAME;
1059 error = getaddrinfo(hostname, NULL, &hints, &aip);
1060 if (error == 0) {
1061 if (aip->ai_canonname != NULL &&
1062 (cp = strchr(aip->ai_canonname, '.')) !=
1063 NULL && *(cp + 1) != '\0')
1064 snprintf(principal, sizeof (principal),
1065 "nfs@%s", aip->ai_canonname);
1066 freeaddrinfo(aip);
1067 }
1068 }
1069 nfsdargp->principal = principal;
1070
1071 if (nfsdcnt_set)
1072 nfsdargp->minthreads = nfsdargp->maxthreads = nfsdcnt;
1073 else {
1074 nfsdargp->minthreads = minthreads_set ? minthreads : get_tuned_nfsdcount();
1075 nfsdargp->maxthreads = maxthreads_set ? maxthreads : nfsdargp->minthreads;
1076 if (nfsdargp->maxthreads < nfsdargp->minthreads)
1077 nfsdargp->maxthreads = nfsdargp->minthreads;
1078 }
1079 error = nfssvc(nfssvc_nfsd, nfsdargp);
1080 if (error < 0 && errno == EAUTH) {
1081 /*
1082 * This indicates that it could not register the
1083 * rpcsec_gss credentials, usually because the
1084 * gssd daemon isn't running.
1085 * (only the experimental server with nfsv4)
1086 */
1087 syslog(LOG_ERR, "No gssd, using AUTH_SYS only");
1088 principal[0] = '\0';
1089 error = nfssvc(nfssvc_nfsd, nfsdargp);
1090 }
1091 if (error < 0) {
1092 if (errno == ENXIO) {
1093 syslog(LOG_ERR, "Bad -p option, cannot run");
1094 if (masterpid != 0 && master == 0)
1095 kill(masterpid, SIGUSR1);
1096 } else
1097 syslog(LOG_ERR, "nfssvc: %m");
1098 status = 1;
1099 }
1100 if (master)
1101 nfsd_exit(status);
1102 else
1103 exit(status);
1104 }
1105
1106 /*
1107 * Open the stable restart file and return the file descriptor for it.
1108 */
1109 static void
open_stable(int * stable_fdp,int * backup_fdp)1110 open_stable(int *stable_fdp, int *backup_fdp)
1111 {
1112 int stable_fd, backup_fd = -1, ret;
1113 struct stat st, backup_st;
1114
1115 /* Open and stat the stable restart file. */
1116 stable_fd = open(NFSD_STABLERESTART, O_RDWR, 0);
1117 if (stable_fd < 0)
1118 stable_fd = open(NFSD_STABLERESTART, O_RDWR | O_CREAT, 0600);
1119 if (stable_fd >= 0) {
1120 ret = fstat(stable_fd, &st);
1121 if (ret < 0) {
1122 close(stable_fd);
1123 stable_fd = -1;
1124 }
1125 }
1126
1127 /* Open and stat the backup stable restart file. */
1128 if (stable_fd >= 0) {
1129 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR, 0);
1130 if (backup_fd < 0)
1131 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR | O_CREAT,
1132 0600);
1133 if (backup_fd >= 0) {
1134 ret = fstat(backup_fd, &backup_st);
1135 if (ret < 0) {
1136 close(backup_fd);
1137 backup_fd = -1;
1138 }
1139 }
1140 if (backup_fd < 0) {
1141 close(stable_fd);
1142 stable_fd = -1;
1143 }
1144 }
1145
1146 *stable_fdp = stable_fd;
1147 *backup_fdp = backup_fd;
1148 if (stable_fd < 0)
1149 return;
1150
1151 /* Sync up the 2 files, as required. */
1152 if (st.st_size > 0)
1153 copy_stable(stable_fd, backup_fd);
1154 else if (backup_st.st_size > 0)
1155 copy_stable(backup_fd, stable_fd);
1156 }
1157
1158 /*
1159 * Copy the stable restart file to the backup or vice versa.
1160 */
1161 static void
copy_stable(int from_fd,int to_fd)1162 copy_stable(int from_fd, int to_fd)
1163 {
1164 int cnt, ret;
1165 static char buf[1024];
1166
1167 ret = lseek(from_fd, (off_t)0, SEEK_SET);
1168 if (ret >= 0)
1169 ret = lseek(to_fd, (off_t)0, SEEK_SET);
1170 if (ret >= 0)
1171 ret = ftruncate(to_fd, (off_t)0);
1172 if (ret >= 0)
1173 do {
1174 cnt = read(from_fd, buf, 1024);
1175 if (cnt > 0)
1176 ret = write(to_fd, buf, cnt);
1177 else if (cnt < 0)
1178 ret = cnt;
1179 } while (cnt > 0 && ret >= 0);
1180 if (ret >= 0)
1181 ret = fsync(to_fd);
1182 if (ret < 0)
1183 syslog(LOG_ERR, "stable restart copy failure: %m");
1184 }
1185
1186 /*
1187 * Back up the stable restart file when indicated by the kernel.
1188 */
1189 static void
backup_stable(__unused int signo)1190 backup_stable(__unused int signo)
1191 {
1192
1193 if (stablefd >= 0)
1194 copy_stable(stablefd, backupfd);
1195 }
1196
1197 /*
1198 * Parse the pNFS string and extract the DS servers and ports numbers.
1199 */
1200 static void
parse_dsserver(const char * optionarg,struct nfsd_nfsd_args * nfsdargp)1201 parse_dsserver(const char *optionarg, struct nfsd_nfsd_args *nfsdargp)
1202 {
1203 char *cp, *cp2, *dsaddr, *dshost, *dspath, *dsvol, nfsprt[9];
1204 char *mdspath, *mdsp, ip6[INET6_ADDRSTRLEN];
1205 const char *ad;
1206 int ecode;
1207 u_int adsiz, dsaddrcnt, dshostcnt, dspathcnt, hostsiz, pathsiz;
1208 u_int mdspathcnt;
1209 size_t dsaddrsiz, dshostsiz, dspathsiz, nfsprtsiz, mdspathsiz;
1210 struct addrinfo hints, *ai_tcp, *res;
1211 struct sockaddr_in sin;
1212 struct sockaddr_in6 sin6;
1213
1214 cp = strdup(optionarg);
1215 if (cp == NULL)
1216 errx(1, "Out of memory");
1217
1218 /* Now, do the host names. */
1219 dspathsiz = 1024;
1220 dspathcnt = 0;
1221 dspath = malloc(dspathsiz);
1222 if (dspath == NULL)
1223 errx(1, "Out of memory");
1224 dshostsiz = 1024;
1225 dshostcnt = 0;
1226 dshost = malloc(dshostsiz);
1227 if (dshost == NULL)
1228 errx(1, "Out of memory");
1229 dsaddrsiz = 1024;
1230 dsaddrcnt = 0;
1231 dsaddr = malloc(dsaddrsiz);
1232 if (dsaddr == NULL)
1233 errx(1, "Out of memory");
1234 mdspathsiz = 1024;
1235 mdspathcnt = 0;
1236 mdspath = malloc(mdspathsiz);
1237 if (mdspath == NULL)
1238 errx(1, "Out of memory");
1239
1240 /* Put the NFS port# in "." form. */
1241 snprintf(nfsprt, 9, ".%d.%d", 2049 >> 8, 2049 & 0xff);
1242 nfsprtsiz = strlen(nfsprt);
1243
1244 ai_tcp = NULL;
1245 /* Loop around for each DS server name. */
1246 do {
1247 cp2 = strchr(cp, ',');
1248 if (cp2 != NULL) {
1249 /* Not the last DS in the list. */
1250 *cp2++ = '\0';
1251 if (*cp2 == '\0')
1252 usage();
1253 }
1254
1255 dsvol = strchr(cp, ':');
1256 if (dsvol == NULL || *(dsvol + 1) == '\0')
1257 usage();
1258 *dsvol++ = '\0';
1259
1260 /* Optional path for MDS file system to be stored on DS. */
1261 mdsp = strchr(dsvol, '#');
1262 if (mdsp != NULL) {
1263 if (*(mdsp + 1) == '\0' || mdsp <= dsvol)
1264 usage();
1265 *mdsp++ = '\0';
1266 }
1267
1268 /* Append this pathname to dspath. */
1269 pathsiz = strlen(dsvol);
1270 if (dspathcnt + pathsiz + 1 > dspathsiz) {
1271 dspathsiz *= 2;
1272 dspath = realloc(dspath, dspathsiz);
1273 if (dspath == NULL)
1274 errx(1, "Out of memory");
1275 }
1276 strcpy(&dspath[dspathcnt], dsvol);
1277 dspathcnt += pathsiz + 1;
1278
1279 /* Append this pathname to mdspath. */
1280 if (mdsp != NULL)
1281 pathsiz = strlen(mdsp);
1282 else
1283 pathsiz = 0;
1284 if (mdspathcnt + pathsiz + 1 > mdspathsiz) {
1285 mdspathsiz *= 2;
1286 mdspath = realloc(mdspath, mdspathsiz);
1287 if (mdspath == NULL)
1288 errx(1, "Out of memory");
1289 }
1290 if (mdsp != NULL)
1291 strcpy(&mdspath[mdspathcnt], mdsp);
1292 else
1293 mdspath[mdspathcnt] = '\0';
1294 mdspathcnt += pathsiz + 1;
1295
1296 if (ai_tcp != NULL)
1297 freeaddrinfo(ai_tcp);
1298
1299 /* Get the fully qualified domain name and IP address. */
1300 memset(&hints, 0, sizeof(hints));
1301 hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
1302 hints.ai_family = PF_UNSPEC;
1303 hints.ai_socktype = SOCK_STREAM;
1304 hints.ai_protocol = IPPROTO_TCP;
1305 ecode = getaddrinfo(cp, NULL, &hints, &ai_tcp);
1306 if (ecode != 0)
1307 err(1, "getaddrinfo pnfs: %s %s", cp,
1308 gai_strerror(ecode));
1309 ad = NULL;
1310 for (res = ai_tcp; res != NULL; res = res->ai_next) {
1311 if (res->ai_addr->sa_family == AF_INET) {
1312 if (res->ai_addrlen < sizeof(sin))
1313 err(1, "getaddrinfo() returned "
1314 "undersized IPv4 address");
1315 /*
1316 * Mips cares about sockaddr_in alignment,
1317 * so copy the address.
1318 */
1319 memcpy(&sin, res->ai_addr, sizeof(sin));
1320 ad = inet_ntoa(sin.sin_addr);
1321 break;
1322 } else if (res->ai_family == AF_INET6) {
1323 if (res->ai_addrlen < sizeof(sin6))
1324 err(1, "getaddrinfo() returned "
1325 "undersized IPv6 address");
1326 /*
1327 * Mips cares about sockaddr_in6 alignment,
1328 * so copy the address.
1329 */
1330 memcpy(&sin6, res->ai_addr, sizeof(sin6));
1331 ad = inet_ntop(AF_INET6, &sin6.sin6_addr, ip6,
1332 sizeof(ip6));
1333
1334 /*
1335 * XXX
1336 * Since a link local address will only
1337 * work if the client and DS are in the
1338 * same scope zone, only use it if it is
1339 * the only address.
1340 */
1341 if (ad != NULL &&
1342 !IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr))
1343 break;
1344 }
1345 }
1346 if (ad == NULL)
1347 err(1, "No IP address for %s", cp);
1348
1349 /* Append this address to dsaddr. */
1350 adsiz = strlen(ad);
1351 if (dsaddrcnt + adsiz + nfsprtsiz + 1 > dsaddrsiz) {
1352 dsaddrsiz *= 2;
1353 dsaddr = realloc(dsaddr, dsaddrsiz);
1354 if (dsaddr == NULL)
1355 errx(1, "Out of memory");
1356 }
1357 strcpy(&dsaddr[dsaddrcnt], ad);
1358 strcat(&dsaddr[dsaddrcnt], nfsprt);
1359 dsaddrcnt += adsiz + nfsprtsiz + 1;
1360
1361 /* Append this hostname to dshost. */
1362 hostsiz = strlen(ai_tcp->ai_canonname);
1363 if (dshostcnt + hostsiz + 1 > dshostsiz) {
1364 dshostsiz *= 2;
1365 dshost = realloc(dshost, dshostsiz);
1366 if (dshost == NULL)
1367 errx(1, "Out of memory");
1368 }
1369 strcpy(&dshost[dshostcnt], ai_tcp->ai_canonname);
1370 dshostcnt += hostsiz + 1;
1371
1372 cp = cp2;
1373 } while (cp != NULL);
1374
1375 nfsdargp->addr = dsaddr;
1376 nfsdargp->addrlen = dsaddrcnt;
1377 nfsdargp->dnshost = dshost;
1378 nfsdargp->dnshostlen = dshostcnt;
1379 nfsdargp->dspath = dspath;
1380 nfsdargp->dspathlen = dspathcnt;
1381 nfsdargp->mdspath = mdspath;
1382 nfsdargp->mdspathlen = mdspathcnt;
1383 freeaddrinfo(ai_tcp);
1384 }
1385
1386