103914b0bSRick Macklem /*-
203914b0bSRick Macklem * Copyright (c) 2009 Rick Macklem, University of Guelph
303914b0bSRick Macklem * All rights reserved.
403914b0bSRick Macklem *
503914b0bSRick Macklem * Redistribution and use in source and binary forms, with or without
603914b0bSRick Macklem * modification, are permitted provided that the following conditions
703914b0bSRick Macklem * are met:
803914b0bSRick Macklem * 1. Redistributions of source code must retain the above copyright
903914b0bSRick Macklem * notice, this list of conditions and the following disclaimer.
1003914b0bSRick Macklem * 2. Redistributions in binary form must reproduce the above copyright
1103914b0bSRick Macklem * notice, this list of conditions and the following disclaimer in the
1203914b0bSRick Macklem * documentation and/or other materials provided with the distribution.
1303914b0bSRick Macklem *
1403914b0bSRick Macklem * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
1503914b0bSRick Macklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1603914b0bSRick Macklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1703914b0bSRick Macklem * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1803914b0bSRick Macklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1903914b0bSRick Macklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2003914b0bSRick Macklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2103914b0bSRick Macklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2203914b0bSRick Macklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2303914b0bSRick Macklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2403914b0bSRick Macklem * SUCH DAMAGE.
2503914b0bSRick Macklem *
2603914b0bSRick Macklem */
2703914b0bSRick Macklem
2803914b0bSRick Macklem #include <sys/param.h>
2903914b0bSRick Macklem #include <sys/ioctl.h>
3003914b0bSRick Macklem #include <sys/linker.h>
3103914b0bSRick Macklem #include <sys/module.h>
3203914b0bSRick Macklem #include <sys/mount.h>
3303914b0bSRick Macklem #include <sys/socket.h>
3403914b0bSRick Macklem #include <sys/socketvar.h>
3503914b0bSRick Macklem #include <sys/stat.h>
3603914b0bSRick Macklem #include <sys/ucred.h>
3703914b0bSRick Macklem #include <sys/uio.h>
3803914b0bSRick Macklem #include <sys/vnode.h>
3903914b0bSRick Macklem #include <sys/wait.h>
4003914b0bSRick Macklem
4103914b0bSRick Macklem #include <nfs/nfssvc.h>
4203914b0bSRick Macklem
4303914b0bSRick Macklem #include <rpc/rpc.h>
4403914b0bSRick Macklem
4565a57061SStanislav Sedov #include <fs/nfs/rpcv2.h>
4603914b0bSRick Macklem #include <fs/nfs/nfsproto.h>
4703914b0bSRick Macklem #include <fs/nfs/nfskpiport.h>
4803914b0bSRick Macklem #include <fs/nfs/nfs.h>
4903914b0bSRick Macklem
5003914b0bSRick Macklem #include <err.h>
5103914b0bSRick Macklem #include <errno.h>
5203914b0bSRick Macklem #include <fcntl.h>
5303914b0bSRick Macklem #include <grp.h>
5403914b0bSRick Macklem #include <netdb.h>
5503914b0bSRick Macklem #include <pwd.h>
5603914b0bSRick Macklem #include <signal.h>
5703914b0bSRick Macklem #include <stdio.h>
5803914b0bSRick Macklem #include <stdlib.h>
5903914b0bSRick Macklem #include <string.h>
6003914b0bSRick Macklem #include <syslog.h>
6103914b0bSRick Macklem #include <unistd.h>
6203914b0bSRick Macklem
6303914b0bSRick Macklem /* Global defs */
6403914b0bSRick Macklem #ifdef DEBUG
6503914b0bSRick Macklem #define syslog(e, s) fprintf(stderr,(s))
66bf70beceSEd Schouten static int debug = 1;
6703914b0bSRick Macklem #else
68bf70beceSEd Schouten static int debug = 0;
6903914b0bSRick Macklem #endif
7003914b0bSRick Macklem
71bf70beceSEd Schouten static pid_t children;
7203914b0bSRick Macklem
739964058eSXin LI static void nonfs(int);
749964058eSXin LI static void reapchild(int);
759964058eSXin LI static void usage(void);
769964058eSXin LI static void cleanup(int);
779964058eSXin LI static void child_cleanup(int);
789964058eSXin LI static void nfscbd_exit(int);
799964058eSXin LI static void killchildren(void);
8003914b0bSRick Macklem
8103914b0bSRick Macklem /*
8203914b0bSRick Macklem * Nfs callback server daemon.
8303914b0bSRick Macklem *
8403914b0bSRick Macklem * 1 - do file descriptor and signal cleanup
8503914b0bSRick Macklem * 2 - fork the nfscbd(s)
8603914b0bSRick Macklem * 4 - create callback server socket(s)
8703914b0bSRick Macklem * 5 - set up server socket for rpc
8803914b0bSRick Macklem *
8903914b0bSRick Macklem * For connectionless protocols, just pass the socket into the kernel via.
9003914b0bSRick Macklem * nfssvc().
9103914b0bSRick Macklem * For connection based sockets, loop doing accepts. When you get a new
9203914b0bSRick Macklem * socket from accept, pass the msgsock into the kernel via. nfssvc().
9303914b0bSRick Macklem */
9403914b0bSRick Macklem int
main(int argc,char * argv[])959964058eSXin LI main(int argc, char *argv[])
9603914b0bSRick Macklem {
9703914b0bSRick Macklem struct nfscbd_args nfscbdargs;
9803914b0bSRick Macklem struct nfsd_nfscbd_args nfscbdargs2;
9903914b0bSRick Macklem struct sockaddr_in inetaddr, inetpeer;
10003914b0bSRick Macklem fd_set ready, sockbits;
1013c49a19fSRick Macklem int ch, connect_type_cnt, maxsock, msgsock, error;
10203914b0bSRick Macklem int nfssvc_flag, on, sock, tcpsock, ret, mustfreeai = 0;
1039964058eSXin LI char *cp, princname[128];
10403914b0bSRick Macklem char myname[MAXHOSTNAMELEN], *myfqdnname = NULL;
10503914b0bSRick Macklem struct addrinfo *aip, hints;
10603914b0bSRick Macklem pid_t pid;
10703914b0bSRick Macklem short myport = NFSV4_CBPORT;
1083c49a19fSRick Macklem socklen_t len;
10903914b0bSRick Macklem
11003914b0bSRick Macklem if (modfind("nfscl") < 0) {
11103914b0bSRick Macklem /* Not present in kernel, try loading it */
11203914b0bSRick Macklem if (kldload("nfscl") < 0 ||
11303914b0bSRick Macklem modfind("nfscl") < 0)
11403914b0bSRick Macklem errx(1, "nfscl is not available");
11503914b0bSRick Macklem }
11603914b0bSRick Macklem /*
11703914b0bSRick Macklem * First, get our fully qualified host name, if possible.
11803914b0bSRick Macklem */
11903914b0bSRick Macklem if (gethostname(myname, MAXHOSTNAMELEN) >= 0) {
12003914b0bSRick Macklem cp = strchr(myname, '.');
12103914b0bSRick Macklem if (cp != NULL && *(cp + 1) != '\0') {
12203914b0bSRick Macklem cp = myname;
12303914b0bSRick Macklem } else {
12403914b0bSRick Macklem /*
12503914b0bSRick Macklem * No domain on myname, so try looking it up.
12603914b0bSRick Macklem */
12703914b0bSRick Macklem cp = NULL;
12803914b0bSRick Macklem memset((void *)&hints, 0, sizeof (hints));
12903914b0bSRick Macklem hints.ai_flags = AI_CANONNAME;
13003914b0bSRick Macklem error = getaddrinfo(myname, NULL, &hints, &aip);
13103914b0bSRick Macklem if (error == 0) {
13203914b0bSRick Macklem if (aip->ai_canonname != NULL &&
13303914b0bSRick Macklem (cp = strchr(aip->ai_canonname, '.')) != NULL
13403914b0bSRick Macklem && *(cp + 1) != '\0') {
13503914b0bSRick Macklem cp = aip->ai_canonname;
13603914b0bSRick Macklem mustfreeai = 1;
13703914b0bSRick Macklem } else {
13803914b0bSRick Macklem freeaddrinfo(aip);
13903914b0bSRick Macklem }
14003914b0bSRick Macklem }
14103914b0bSRick Macklem }
14203914b0bSRick Macklem if (cp == NULL)
14303914b0bSRick Macklem warnx("Can't get fully qualified host name");
14403914b0bSRick Macklem myfqdnname = cp;
14503914b0bSRick Macklem }
14603914b0bSRick Macklem
14703914b0bSRick Macklem princname[0] = '\0';
14803914b0bSRick Macklem #define GETOPT "p:P:"
14903914b0bSRick Macklem #define USAGE "[ -p port_num ] [ -P client_principal ]"
15003914b0bSRick Macklem while ((ch = getopt(argc, argv, GETOPT)) != -1)
15103914b0bSRick Macklem switch (ch) {
15203914b0bSRick Macklem case 'p':
15303914b0bSRick Macklem myport = atoi(optarg);
15403914b0bSRick Macklem if (myport < 1) {
15503914b0bSRick Macklem warnx("port# non-positive, reset to %d",
15603914b0bSRick Macklem NFSV4_CBPORT);
15703914b0bSRick Macklem myport = NFSV4_CBPORT;
15803914b0bSRick Macklem }
15903914b0bSRick Macklem break;
16003914b0bSRick Macklem case 'P':
16103914b0bSRick Macklem cp = optarg;
16203914b0bSRick Macklem if (cp != NULL && strlen(cp) > 0 &&
16303914b0bSRick Macklem strlen(cp) < sizeof (princname)) {
16403914b0bSRick Macklem if (strchr(cp, '@') == NULL &&
16503914b0bSRick Macklem myfqdnname != NULL)
16603914b0bSRick Macklem snprintf(princname, sizeof (princname),
16703914b0bSRick Macklem "%s@%s", cp, myfqdnname);
16803914b0bSRick Macklem else
16903914b0bSRick Macklem strlcpy(princname, cp,
17003914b0bSRick Macklem sizeof (princname));
17103914b0bSRick Macklem } else {
17203914b0bSRick Macklem warnx("client princ invalid. ignored\n");
17303914b0bSRick Macklem }
17403914b0bSRick Macklem break;
17503914b0bSRick Macklem default:
17603914b0bSRick Macklem case '?':
17703914b0bSRick Macklem usage();
17880c7cc1cSPedro F. Giffuni }
17903914b0bSRick Macklem argv += optind;
18003914b0bSRick Macklem argc -= optind;
18103914b0bSRick Macklem
18203914b0bSRick Macklem if (argc > 0)
18303914b0bSRick Macklem usage();
18403914b0bSRick Macklem
18503914b0bSRick Macklem if (mustfreeai)
18603914b0bSRick Macklem freeaddrinfo(aip);
18703914b0bSRick Macklem nfscbdargs2.principal = (const char *)princname;
18803914b0bSRick Macklem if (debug == 0) {
18903914b0bSRick Macklem daemon(0, 0);
19003914b0bSRick Macklem (void)signal(SIGTERM, SIG_IGN);
19103914b0bSRick Macklem (void)signal(SIGHUP, SIG_IGN);
19203914b0bSRick Macklem (void)signal(SIGINT, SIG_IGN);
19303914b0bSRick Macklem (void)signal(SIGQUIT, SIG_IGN);
19403914b0bSRick Macklem }
19503914b0bSRick Macklem (void)signal(SIGSYS, nonfs);
19603914b0bSRick Macklem (void)signal(SIGCHLD, reapchild);
19703914b0bSRick Macklem
19803914b0bSRick Macklem openlog("nfscbd:", LOG_PID, LOG_DAEMON);
19903914b0bSRick Macklem
20003914b0bSRick Macklem pid = fork();
20103914b0bSRick Macklem if (pid < 0) {
20203914b0bSRick Macklem syslog(LOG_ERR, "fork: %m");
20303914b0bSRick Macklem nfscbd_exit(1);
20403914b0bSRick Macklem } else if (pid > 0) {
20503914b0bSRick Macklem children = pid;
20603914b0bSRick Macklem } else {
20703914b0bSRick Macklem (void)signal(SIGUSR1, child_cleanup);
20803914b0bSRick Macklem setproctitle("server");
20903914b0bSRick Macklem nfssvc_flag = NFSSVC_NFSCBD;
21003914b0bSRick Macklem if (nfssvc(nfssvc_flag, &nfscbdargs2) < 0) {
21103914b0bSRick Macklem syslog(LOG_ERR, "nfssvc: %m");
21203914b0bSRick Macklem nfscbd_exit(1);
21303914b0bSRick Macklem }
21403914b0bSRick Macklem exit(0);
21503914b0bSRick Macklem }
21603914b0bSRick Macklem (void)signal(SIGUSR1, cleanup);
21703914b0bSRick Macklem
21803914b0bSRick Macklem if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
21903914b0bSRick Macklem syslog(LOG_ERR, "can't create udp socket");
22003914b0bSRick Macklem nfscbd_exit(1);
22103914b0bSRick Macklem }
22203914b0bSRick Macklem memset(&inetaddr, 0, sizeof inetaddr);
22303914b0bSRick Macklem inetaddr.sin_family = AF_INET;
22403914b0bSRick Macklem inetaddr.sin_addr.s_addr = INADDR_ANY;
22503914b0bSRick Macklem inetaddr.sin_port = htons(myport);
22603914b0bSRick Macklem inetaddr.sin_len = sizeof(inetaddr);
22703914b0bSRick Macklem ret = bind(sock, (struct sockaddr *)&inetaddr, sizeof(inetaddr));
22803914b0bSRick Macklem /* If bind() fails, this is a restart, so just skip UDP. */
22903914b0bSRick Macklem if (ret == 0) {
23003914b0bSRick Macklem len = sizeof(inetaddr);
23103914b0bSRick Macklem if (getsockname(sock, (struct sockaddr *)&inetaddr, &len) < 0){
23203914b0bSRick Macklem syslog(LOG_ERR, "can't get bound addr");
23303914b0bSRick Macklem nfscbd_exit(1);
23403914b0bSRick Macklem }
23503914b0bSRick Macklem nfscbdargs.port = ntohs(inetaddr.sin_port);
23603914b0bSRick Macklem if (nfscbdargs.port != myport) {
23703914b0bSRick Macklem syslog(LOG_ERR, "BAD PORT#");
23803914b0bSRick Macklem nfscbd_exit(1);
23903914b0bSRick Macklem }
24003914b0bSRick Macklem nfscbdargs.sock = sock;
24103914b0bSRick Macklem nfscbdargs.name = NULL;
24203914b0bSRick Macklem nfscbdargs.namelen = 0;
24303914b0bSRick Macklem if (nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs) < 0) {
24403914b0bSRick Macklem syslog(LOG_ERR, "can't Add UDP socket");
24503914b0bSRick Macklem nfscbd_exit(1);
24603914b0bSRick Macklem }
24703914b0bSRick Macklem }
24803914b0bSRick Macklem (void)close(sock);
24903914b0bSRick Macklem
25003914b0bSRick Macklem /* Now set up the master server socket waiting for tcp connections. */
25103914b0bSRick Macklem on = 1;
25203914b0bSRick Macklem FD_ZERO(&sockbits);
25303914b0bSRick Macklem connect_type_cnt = 0;
25403914b0bSRick Macklem if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
25503914b0bSRick Macklem syslog(LOG_ERR, "can't create tcp socket");
25603914b0bSRick Macklem nfscbd_exit(1);
25703914b0bSRick Macklem }
25803914b0bSRick Macklem if (setsockopt(tcpsock,
25903914b0bSRick Macklem SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
26003914b0bSRick Macklem syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
26103914b0bSRick Macklem /* sin_port is already set */
26203914b0bSRick Macklem inetaddr.sin_family = AF_INET;
26303914b0bSRick Macklem inetaddr.sin_addr.s_addr = INADDR_ANY;
26403914b0bSRick Macklem inetaddr.sin_port = htons(myport);
26503914b0bSRick Macklem inetaddr.sin_len = sizeof(inetaddr);
26603914b0bSRick Macklem if (bind(tcpsock,
26703914b0bSRick Macklem (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
26803914b0bSRick Macklem syslog(LOG_ERR, "can't bind tcp addr");
26903914b0bSRick Macklem nfscbd_exit(1);
27003914b0bSRick Macklem }
27103914b0bSRick Macklem if (listen(tcpsock, 5) < 0) {
27203914b0bSRick Macklem syslog(LOG_ERR, "listen failed");
27303914b0bSRick Macklem nfscbd_exit(1);
27403914b0bSRick Macklem }
27503914b0bSRick Macklem FD_SET(tcpsock, &sockbits);
27603914b0bSRick Macklem maxsock = tcpsock;
27703914b0bSRick Macklem connect_type_cnt++;
27803914b0bSRick Macklem
27903914b0bSRick Macklem setproctitle("master");
28003914b0bSRick Macklem
28103914b0bSRick Macklem /*
28203914b0bSRick Macklem * Loop forever accepting connections and passing the sockets
28303914b0bSRick Macklem * into the kernel for the mounts.
28403914b0bSRick Macklem */
28503914b0bSRick Macklem for (;;) {
28603914b0bSRick Macklem ready = sockbits;
28703914b0bSRick Macklem if (connect_type_cnt > 1) {
28803914b0bSRick Macklem if (select(maxsock + 1,
28903914b0bSRick Macklem &ready, NULL, NULL, NULL) < 1) {
29003914b0bSRick Macklem syslog(LOG_ERR, "select failed: %m");
29103914b0bSRick Macklem nfscbd_exit(1);
29203914b0bSRick Macklem }
29303914b0bSRick Macklem }
29403914b0bSRick Macklem if (FD_ISSET(tcpsock, &ready)) {
29503914b0bSRick Macklem len = sizeof(inetpeer);
29603914b0bSRick Macklem if ((msgsock = accept(tcpsock,
29703914b0bSRick Macklem (struct sockaddr *)&inetpeer, &len)) < 0) {
29803914b0bSRick Macklem syslog(LOG_ERR, "accept failed: %m");
29903914b0bSRick Macklem nfscbd_exit(1);
30003914b0bSRick Macklem }
30103914b0bSRick Macklem memset(inetpeer.sin_zero, 0,
30203914b0bSRick Macklem sizeof (inetpeer.sin_zero));
30303914b0bSRick Macklem if (setsockopt(msgsock, SOL_SOCKET,
30403914b0bSRick Macklem SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
30503914b0bSRick Macklem syslog(LOG_ERR,
30603914b0bSRick Macklem "setsockopt SO_KEEPALIVE: %m");
30703914b0bSRick Macklem nfscbdargs.sock = msgsock;
30803914b0bSRick Macklem nfscbdargs.name = (caddr_t)&inetpeer;
30903914b0bSRick Macklem nfscbdargs.namelen = sizeof(inetpeer);
31003914b0bSRick Macklem nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs);
31103914b0bSRick Macklem (void)close(msgsock);
31203914b0bSRick Macklem }
31303914b0bSRick Macklem }
31403914b0bSRick Macklem }
31503914b0bSRick Macklem
3169964058eSXin LI static void
usage(void)31703914b0bSRick Macklem usage(void)
31803914b0bSRick Macklem {
31903914b0bSRick Macklem
32003914b0bSRick Macklem errx(1, "usage: nfscbd %s", USAGE);
32103914b0bSRick Macklem }
32203914b0bSRick Macklem
3239964058eSXin LI static void
nonfs(int signo __unused)3249964058eSXin LI nonfs(int signo __unused)
32503914b0bSRick Macklem {
32603914b0bSRick Macklem syslog(LOG_ERR, "missing system call: NFS not available");
32703914b0bSRick Macklem }
32803914b0bSRick Macklem
3299964058eSXin LI static void
reapchild(int signo __unused)3309964058eSXin LI reapchild(int signo __unused)
33103914b0bSRick Macklem {
33203914b0bSRick Macklem pid_t pid;
33303914b0bSRick Macklem
33403914b0bSRick Macklem while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
33503914b0bSRick Macklem if (pid == children)
33603914b0bSRick Macklem children = -1;
33703914b0bSRick Macklem }
33803914b0bSRick Macklem }
33903914b0bSRick Macklem
3409964058eSXin LI static void
killchildren(void)34103914b0bSRick Macklem killchildren(void)
34203914b0bSRick Macklem {
34303914b0bSRick Macklem
34403914b0bSRick Macklem if (children > 0)
34503914b0bSRick Macklem kill(children, SIGKILL);
34603914b0bSRick Macklem }
34703914b0bSRick Macklem
34803914b0bSRick Macklem /*
34903914b0bSRick Macklem * Cleanup master after SIGUSR1.
35003914b0bSRick Macklem */
3519964058eSXin LI static void
cleanup(int signo __unused)3529964058eSXin LI cleanup(int signo __unused)
35303914b0bSRick Macklem {
35403914b0bSRick Macklem nfscbd_exit(0);
35503914b0bSRick Macklem }
35603914b0bSRick Macklem
35703914b0bSRick Macklem /*
35803914b0bSRick Macklem * Cleanup child after SIGUSR1.
35903914b0bSRick Macklem */
3609964058eSXin LI static void
child_cleanup(int signo __unused)3619964058eSXin LI child_cleanup(int signo __unused)
36203914b0bSRick Macklem {
36303914b0bSRick Macklem exit(0);
36403914b0bSRick Macklem }
36503914b0bSRick Macklem
3669964058eSXin LI static void
nfscbd_exit(int status __unused)3679964058eSXin LI nfscbd_exit(int status __unused)
36803914b0bSRick Macklem {
36903914b0bSRick Macklem killchildren();
37003914b0bSRick Macklem exit(status);
37103914b0bSRick Macklem }
372