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/cdefs.h> 2903914b0bSRick Macklem __FBSDID("$FreeBSD$"); 3003914b0bSRick Macklem 3103914b0bSRick Macklem #include <sys/param.h> 3203914b0bSRick Macklem #include <sys/ioctl.h> 3303914b0bSRick Macklem #include <sys/linker.h> 3403914b0bSRick Macklem #include <sys/module.h> 3503914b0bSRick Macklem #include <sys/mount.h> 3603914b0bSRick Macklem #include <sys/socket.h> 3703914b0bSRick Macklem #include <sys/socketvar.h> 3803914b0bSRick Macklem #include <sys/stat.h> 3903914b0bSRick Macklem #include <sys/ucred.h> 4003914b0bSRick Macklem #include <sys/uio.h> 4103914b0bSRick Macklem #include <sys/vnode.h> 4203914b0bSRick Macklem #include <sys/wait.h> 4303914b0bSRick Macklem 4403914b0bSRick Macklem #include <nfs/nfssvc.h> 4503914b0bSRick Macklem 4603914b0bSRick Macklem #include <rpc/rpc.h> 4703914b0bSRick Macklem 4803914b0bSRick Macklem #include <fs/nfs/nfsproto.h> 4903914b0bSRick Macklem #include <fs/nfs/nfskpiport.h> 5003914b0bSRick Macklem #include <fs/nfs/nfs.h> 5103914b0bSRick Macklem #include <fs/nfs/rpcv2.h> 5203914b0bSRick Macklem 5303914b0bSRick Macklem #include <err.h> 5403914b0bSRick Macklem #include <errno.h> 5503914b0bSRick Macklem #include <fcntl.h> 5603914b0bSRick Macklem #include <grp.h> 5703914b0bSRick Macklem #include <netdb.h> 5803914b0bSRick Macklem #include <pwd.h> 5903914b0bSRick Macklem #include <signal.h> 6003914b0bSRick Macklem #include <stdio.h> 6103914b0bSRick Macklem #include <stdlib.h> 6203914b0bSRick Macklem #include <string.h> 6303914b0bSRick Macklem #include <syslog.h> 6403914b0bSRick Macklem #include <unistd.h> 6503914b0bSRick Macklem 6603914b0bSRick Macklem /* Global defs */ 6703914b0bSRick Macklem #ifdef DEBUG 6803914b0bSRick Macklem #define syslog(e, s) fprintf(stderr,(s)) 6903914b0bSRick Macklem int debug = 1; 7003914b0bSRick Macklem #else 7103914b0bSRick Macklem int debug = 0; 7203914b0bSRick Macklem #endif 7303914b0bSRick Macklem 7403914b0bSRick Macklem pid_t children; 7503914b0bSRick Macklem 7603914b0bSRick Macklem void nonfs(int); 7703914b0bSRick Macklem void reapchild(int); 7803914b0bSRick Macklem void usage(void); 7903914b0bSRick Macklem void cleanup(int); 8003914b0bSRick Macklem void child_cleanup(int); 8103914b0bSRick Macklem void nfscbd_exit(int); 8203914b0bSRick Macklem void killchildren(void); 8303914b0bSRick Macklem 8403914b0bSRick Macklem /* 8503914b0bSRick Macklem * Nfs callback server daemon. 8603914b0bSRick Macklem * 8703914b0bSRick Macklem * 1 - do file descriptor and signal cleanup 8803914b0bSRick Macklem * 2 - fork the nfscbd(s) 8903914b0bSRick Macklem * 4 - create callback server socket(s) 9003914b0bSRick Macklem * 5 - set up server socket for rpc 9103914b0bSRick Macklem * 9203914b0bSRick Macklem * For connectionless protocols, just pass the socket into the kernel via. 9303914b0bSRick Macklem * nfssvc(). 9403914b0bSRick Macklem * For connection based sockets, loop doing accepts. When you get a new 9503914b0bSRick Macklem * socket from accept, pass the msgsock into the kernel via. nfssvc(). 9603914b0bSRick Macklem */ 9703914b0bSRick Macklem int 9803914b0bSRick Macklem main(int argc, char *argv[], char **envp) 9903914b0bSRick Macklem { 10003914b0bSRick Macklem struct group *grp; 10103914b0bSRick Macklem struct nfscbd_args nfscbdargs; 10203914b0bSRick Macklem struct nfsd_nfscbd_args nfscbdargs2; 10303914b0bSRick Macklem struct passwd *pwd; 10403914b0bSRick Macklem struct ucred *cr; 10503914b0bSRick Macklem struct sockaddr_in inetaddr, inetpeer; 10603914b0bSRick Macklem struct timeval ktv; 10703914b0bSRick Macklem fd_set ready, sockbits; 10803914b0bSRick Macklem int ch, connect_type_cnt, i, len, maxsock, msgsock, error; 10903914b0bSRick Macklem int nfssvc_flag, on, sock, tcpsock, ret, mustfreeai = 0; 11003914b0bSRick Macklem char *cp, **cpp, princname[128]; 11103914b0bSRick Macklem char myname[MAXHOSTNAMELEN], *myfqdnname = NULL; 11203914b0bSRick Macklem struct addrinfo *aip, hints; 11303914b0bSRick Macklem pid_t pid; 11403914b0bSRick Macklem sigset_t signew; 11503914b0bSRick Macklem short myport = NFSV4_CBPORT; 11603914b0bSRick Macklem 11703914b0bSRick Macklem if (modfind("nfscl") < 0) { 11803914b0bSRick Macklem /* Not present in kernel, try loading it */ 11903914b0bSRick Macklem if (kldload("nfscl") < 0 || 12003914b0bSRick Macklem modfind("nfscl") < 0) 12103914b0bSRick Macklem errx(1, "nfscl is not available"); 12203914b0bSRick Macklem } 12303914b0bSRick Macklem /* 12403914b0bSRick Macklem * First, get our fully qualified host name, if possible. 12503914b0bSRick Macklem */ 12603914b0bSRick Macklem if (gethostname(myname, MAXHOSTNAMELEN) >= 0) { 12703914b0bSRick Macklem cp = strchr(myname, '.'); 12803914b0bSRick Macklem if (cp != NULL && *(cp + 1) != '\0') { 12903914b0bSRick Macklem cp = myname; 13003914b0bSRick Macklem } else { 13103914b0bSRick Macklem /* 13203914b0bSRick Macklem * No domain on myname, so try looking it up. 13303914b0bSRick Macklem */ 13403914b0bSRick Macklem cp = NULL; 13503914b0bSRick Macklem memset((void *)&hints, 0, sizeof (hints)); 13603914b0bSRick Macklem hints.ai_flags = AI_CANONNAME; 13703914b0bSRick Macklem error = getaddrinfo(myname, NULL, &hints, &aip); 13803914b0bSRick Macklem if (error == 0) { 13903914b0bSRick Macklem if (aip->ai_canonname != NULL && 14003914b0bSRick Macklem (cp = strchr(aip->ai_canonname, '.')) != NULL 14103914b0bSRick Macklem && *(cp + 1) != '\0') { 14203914b0bSRick Macklem cp = aip->ai_canonname; 14303914b0bSRick Macklem mustfreeai = 1; 14403914b0bSRick Macklem } else { 14503914b0bSRick Macklem freeaddrinfo(aip); 14603914b0bSRick Macklem } 14703914b0bSRick Macklem } 14803914b0bSRick Macklem } 14903914b0bSRick Macklem if (cp == NULL) 15003914b0bSRick Macklem warnx("Can't get fully qualified host name"); 15103914b0bSRick Macklem myfqdnname = cp; 15203914b0bSRick Macklem } 15303914b0bSRick Macklem 15403914b0bSRick Macklem princname[0] = '\0'; 15503914b0bSRick Macklem #define GETOPT "p:P:" 15603914b0bSRick Macklem #define USAGE "[ -p port_num ] [ -P client_principal ]" 15703914b0bSRick Macklem while ((ch = getopt(argc, argv, GETOPT)) != -1) 15803914b0bSRick Macklem switch (ch) { 15903914b0bSRick Macklem case 'p': 16003914b0bSRick Macklem myport = atoi(optarg); 16103914b0bSRick Macklem if (myport < 1) { 16203914b0bSRick Macklem warnx("port# non-positive, reset to %d", 16303914b0bSRick Macklem NFSV4_CBPORT); 16403914b0bSRick Macklem myport = NFSV4_CBPORT; 16503914b0bSRick Macklem } 16603914b0bSRick Macklem break; 16703914b0bSRick Macklem case 'P': 16803914b0bSRick Macklem cp = optarg; 16903914b0bSRick Macklem if (cp != NULL && strlen(cp) > 0 && 17003914b0bSRick Macklem strlen(cp) < sizeof (princname)) { 17103914b0bSRick Macklem if (strchr(cp, '@') == NULL && 17203914b0bSRick Macklem myfqdnname != NULL) 17303914b0bSRick Macklem snprintf(princname, sizeof (princname), 17403914b0bSRick Macklem "%s@%s", cp, myfqdnname); 17503914b0bSRick Macklem else 17603914b0bSRick Macklem strlcpy(princname, cp, 17703914b0bSRick Macklem sizeof (princname)); 17803914b0bSRick Macklem } else { 17903914b0bSRick Macklem warnx("client princ invalid. ignored\n"); 18003914b0bSRick Macklem } 18103914b0bSRick Macklem break; 18203914b0bSRick Macklem default: 18303914b0bSRick Macklem case '?': 18403914b0bSRick Macklem usage(); 18503914b0bSRick Macklem }; 18603914b0bSRick Macklem argv += optind; 18703914b0bSRick Macklem argc -= optind; 18803914b0bSRick Macklem 18903914b0bSRick Macklem if (argc > 0) 19003914b0bSRick Macklem usage(); 19103914b0bSRick Macklem 19203914b0bSRick Macklem if (mustfreeai) 19303914b0bSRick Macklem freeaddrinfo(aip); 19403914b0bSRick Macklem nfscbdargs2.principal = (const char *)princname; 19503914b0bSRick Macklem if (debug == 0) { 19603914b0bSRick Macklem daemon(0, 0); 19703914b0bSRick Macklem (void)signal(SIGTERM, SIG_IGN); 19803914b0bSRick Macklem (void)signal(SIGHUP, SIG_IGN); 19903914b0bSRick Macklem (void)signal(SIGINT, SIG_IGN); 20003914b0bSRick Macklem (void)signal(SIGQUIT, SIG_IGN); 20103914b0bSRick Macklem } 20203914b0bSRick Macklem (void)signal(SIGSYS, nonfs); 20303914b0bSRick Macklem (void)signal(SIGCHLD, reapchild); 20403914b0bSRick Macklem 20503914b0bSRick Macklem openlog("nfscbd:", LOG_PID, LOG_DAEMON); 20603914b0bSRick Macklem 20703914b0bSRick Macklem pid = fork(); 20803914b0bSRick Macklem if (pid < 0) { 20903914b0bSRick Macklem syslog(LOG_ERR, "fork: %m"); 21003914b0bSRick Macklem nfscbd_exit(1); 21103914b0bSRick Macklem } else if (pid > 0) { 21203914b0bSRick Macklem children = pid; 21303914b0bSRick Macklem } else { 21403914b0bSRick Macklem (void)signal(SIGUSR1, child_cleanup); 21503914b0bSRick Macklem setproctitle("server"); 21603914b0bSRick Macklem nfssvc_flag = NFSSVC_NFSCBD; 21703914b0bSRick Macklem if (nfssvc(nfssvc_flag, &nfscbdargs2) < 0) { 21803914b0bSRick Macklem syslog(LOG_ERR, "nfssvc: %m"); 21903914b0bSRick Macklem nfscbd_exit(1); 22003914b0bSRick Macklem } 22103914b0bSRick Macklem exit(0); 22203914b0bSRick Macklem } 22303914b0bSRick Macklem (void)signal(SIGUSR1, cleanup); 22403914b0bSRick Macklem 22503914b0bSRick Macklem if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 22603914b0bSRick Macklem syslog(LOG_ERR, "can't create udp socket"); 22703914b0bSRick Macklem nfscbd_exit(1); 22803914b0bSRick Macklem } 22903914b0bSRick Macklem memset(&inetaddr, 0, sizeof inetaddr); 23003914b0bSRick Macklem inetaddr.sin_family = AF_INET; 23103914b0bSRick Macklem inetaddr.sin_addr.s_addr = INADDR_ANY; 23203914b0bSRick Macklem inetaddr.sin_port = htons(myport); 23303914b0bSRick Macklem inetaddr.sin_len = sizeof(inetaddr); 23403914b0bSRick Macklem ret = bind(sock, (struct sockaddr *)&inetaddr, sizeof(inetaddr)); 23503914b0bSRick Macklem /* If bind() fails, this is a restart, so just skip UDP. */ 23603914b0bSRick Macklem if (ret == 0) { 23703914b0bSRick Macklem len = sizeof(inetaddr); 23803914b0bSRick Macklem if (getsockname(sock, (struct sockaddr *)&inetaddr, &len) < 0){ 23903914b0bSRick Macklem syslog(LOG_ERR, "can't get bound addr"); 24003914b0bSRick Macklem nfscbd_exit(1); 24103914b0bSRick Macklem } 24203914b0bSRick Macklem nfscbdargs.port = ntohs(inetaddr.sin_port); 24303914b0bSRick Macklem if (nfscbdargs.port != myport) { 24403914b0bSRick Macklem syslog(LOG_ERR, "BAD PORT#"); 24503914b0bSRick Macklem nfscbd_exit(1); 24603914b0bSRick Macklem } 24703914b0bSRick Macklem nfscbdargs.sock = sock; 24803914b0bSRick Macklem nfscbdargs.name = NULL; 24903914b0bSRick Macklem nfscbdargs.namelen = 0; 25003914b0bSRick Macklem if (nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs) < 0) { 25103914b0bSRick Macklem syslog(LOG_ERR, "can't Add UDP socket"); 25203914b0bSRick Macklem nfscbd_exit(1); 25303914b0bSRick Macklem } 25403914b0bSRick Macklem } 25503914b0bSRick Macklem (void)close(sock); 25603914b0bSRick Macklem 25703914b0bSRick Macklem /* Now set up the master server socket waiting for tcp connections. */ 25803914b0bSRick Macklem on = 1; 25903914b0bSRick Macklem FD_ZERO(&sockbits); 26003914b0bSRick Macklem connect_type_cnt = 0; 26103914b0bSRick Macklem if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 26203914b0bSRick Macklem syslog(LOG_ERR, "can't create tcp socket"); 26303914b0bSRick Macklem nfscbd_exit(1); 26403914b0bSRick Macklem } 26503914b0bSRick Macklem if (setsockopt(tcpsock, 26603914b0bSRick Macklem SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 26703914b0bSRick Macklem syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 26803914b0bSRick Macklem /* sin_port is already set */ 26903914b0bSRick Macklem inetaddr.sin_family = AF_INET; 27003914b0bSRick Macklem inetaddr.sin_addr.s_addr = INADDR_ANY; 27103914b0bSRick Macklem inetaddr.sin_port = htons(myport); 27203914b0bSRick Macklem inetaddr.sin_len = sizeof(inetaddr); 27303914b0bSRick Macklem if (bind(tcpsock, 27403914b0bSRick Macklem (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) { 27503914b0bSRick Macklem syslog(LOG_ERR, "can't bind tcp addr"); 27603914b0bSRick Macklem nfscbd_exit(1); 27703914b0bSRick Macklem } 27803914b0bSRick Macklem if (listen(tcpsock, 5) < 0) { 27903914b0bSRick Macklem syslog(LOG_ERR, "listen failed"); 28003914b0bSRick Macklem nfscbd_exit(1); 28103914b0bSRick Macklem } 28203914b0bSRick Macklem FD_SET(tcpsock, &sockbits); 28303914b0bSRick Macklem maxsock = tcpsock; 28403914b0bSRick Macklem connect_type_cnt++; 28503914b0bSRick Macklem 28603914b0bSRick Macklem setproctitle("master"); 28703914b0bSRick Macklem 28803914b0bSRick Macklem /* 28903914b0bSRick Macklem * Loop forever accepting connections and passing the sockets 29003914b0bSRick Macklem * into the kernel for the mounts. 29103914b0bSRick Macklem */ 29203914b0bSRick Macklem for (;;) { 29303914b0bSRick Macklem ready = sockbits; 29403914b0bSRick Macklem if (connect_type_cnt > 1) { 29503914b0bSRick Macklem if (select(maxsock + 1, 29603914b0bSRick Macklem &ready, NULL, NULL, NULL) < 1) { 29703914b0bSRick Macklem syslog(LOG_ERR, "select failed: %m"); 29803914b0bSRick Macklem nfscbd_exit(1); 29903914b0bSRick Macklem } 30003914b0bSRick Macklem } 30103914b0bSRick Macklem if (FD_ISSET(tcpsock, &ready)) { 30203914b0bSRick Macklem len = sizeof(inetpeer); 30303914b0bSRick Macklem if ((msgsock = accept(tcpsock, 30403914b0bSRick Macklem (struct sockaddr *)&inetpeer, &len)) < 0) { 30503914b0bSRick Macklem syslog(LOG_ERR, "accept failed: %m"); 30603914b0bSRick Macklem nfscbd_exit(1); 30703914b0bSRick Macklem } 30803914b0bSRick Macklem memset(inetpeer.sin_zero, 0, 30903914b0bSRick Macklem sizeof (inetpeer.sin_zero)); 31003914b0bSRick Macklem if (setsockopt(msgsock, SOL_SOCKET, 31103914b0bSRick Macklem SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 31203914b0bSRick Macklem syslog(LOG_ERR, 31303914b0bSRick Macklem "setsockopt SO_KEEPALIVE: %m"); 31403914b0bSRick Macklem nfscbdargs.sock = msgsock; 31503914b0bSRick Macklem nfscbdargs.name = (caddr_t)&inetpeer; 31603914b0bSRick Macklem nfscbdargs.namelen = sizeof(inetpeer); 31703914b0bSRick Macklem nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs); 31803914b0bSRick Macklem (void)close(msgsock); 31903914b0bSRick Macklem } 32003914b0bSRick Macklem } 32103914b0bSRick Macklem } 32203914b0bSRick Macklem 32303914b0bSRick Macklem void 32403914b0bSRick Macklem usage(void) 32503914b0bSRick Macklem { 32603914b0bSRick Macklem 32703914b0bSRick Macklem errx(1, "usage: nfscbd %s", USAGE); 32803914b0bSRick Macklem } 32903914b0bSRick Macklem 33003914b0bSRick Macklem void 33103914b0bSRick Macklem nonfs(int signo) 33203914b0bSRick Macklem { 33303914b0bSRick Macklem syslog(LOG_ERR, "missing system call: NFS not available"); 33403914b0bSRick Macklem } 33503914b0bSRick Macklem 33603914b0bSRick Macklem void 33703914b0bSRick Macklem reapchild(int signo) 33803914b0bSRick Macklem { 33903914b0bSRick Macklem pid_t pid; 34003914b0bSRick Macklem int i; 34103914b0bSRick Macklem 34203914b0bSRick Macklem while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) { 34303914b0bSRick Macklem if (pid == children) 34403914b0bSRick Macklem children = -1; 34503914b0bSRick Macklem } 34603914b0bSRick Macklem } 34703914b0bSRick Macklem 34803914b0bSRick Macklem void 34903914b0bSRick Macklem killchildren(void) 35003914b0bSRick Macklem { 35103914b0bSRick Macklem int i; 35203914b0bSRick Macklem 35303914b0bSRick Macklem if (children > 0) 35403914b0bSRick Macklem kill(children, SIGKILL); 35503914b0bSRick Macklem } 35603914b0bSRick Macklem 35703914b0bSRick Macklem /* 35803914b0bSRick Macklem * Cleanup master after SIGUSR1. 35903914b0bSRick Macklem */ 36003914b0bSRick Macklem void 36103914b0bSRick Macklem cleanup(int signo) 36203914b0bSRick Macklem { 36303914b0bSRick Macklem nfscbd_exit(0); 36403914b0bSRick Macklem } 36503914b0bSRick Macklem 36603914b0bSRick Macklem /* 36703914b0bSRick Macklem * Cleanup child after SIGUSR1. 36803914b0bSRick Macklem */ 36903914b0bSRick Macklem void 37003914b0bSRick Macklem child_cleanup(int signo) 37103914b0bSRick Macklem { 37203914b0bSRick Macklem exit(0); 37303914b0bSRick Macklem } 37403914b0bSRick Macklem 37503914b0bSRick Macklem void 37603914b0bSRick Macklem nfscbd_exit(int status) 37703914b0bSRick Macklem { 37803914b0bSRick Macklem killchildren(); 37903914b0bSRick Macklem exit(status); 38003914b0bSRick Macklem } 381