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[unix-history] / usr / src / sbin / nfsd / nfsd.c
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* %sccs.include.redist.c%
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)nfsd.c 8.8 (Berkeley) %G%";
#endif not lint
#include <sys/param.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#ifdef ISO
#include <netiso/iso.h>
#endif
#include <nfs/rpcv2.h>
#include <nfs/nfsv2.h>
#include <nfs/nfs.h>
#ifdef KERBEROS
#include <kerberosIV/des.h>
#include <kerberosIV/krb.h>
#endif
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
/* Global defs */
#ifdef DEBUG
#define syslog(e, s) fprintf(stderr,(s))
int debug = 1;
#else
int debug = 0;
#endif
struct nfsd_srvargs nsd;
char **Argv = NULL; /* pointer to argument vector */
char *LastArg = NULL; /* end of argv */
#ifdef KERBEROS
char lnam[ANAME_SZ];
KTEXT_ST kt;
AUTH_DAT auth;
char inst[INST_SZ];
#endif
void nonfs __P((int));
void reapchild __P((int));
void setproctitle __P((char *));
void usage __P((void));
/*
* Nfs server daemon mostly just a user context for nfssvc()
*
* 1 - do file descriptor and signal cleanup
* 2 - fork the nfsd(s)
* 3 - create server socket(s)
* 4 - register socket with portmap
*
* For connectionless protocols, just pass the socket into the kernel via.
* nfssvc().
* For connection based sockets, loop doing accepts. When you get a new
* socket from accept, pass the msgsock into the kernel via. nfssvc().
* The arguments are:
* -c - support iso cltp clients
* -r - reregister with portmapper
* -t - support tcp nfs clients
* -u - support udp nfs clients
* followed by "n" which is the number of nfsds' to fork off
*/
int
main(argc, argv, envp)
int argc;
char *argv[], *envp[];
{
extern int optind;
struct group *grp;
struct nfsd_args nfsdargs;
struct passwd *pwd;
struct ucred *cr;
struct sockaddr_in inetaddr, inetpeer;
#ifdef ISO
struct sockaddr_iso isoaddr, isopeer;
#endif
fd_set ready, sockbits;
int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
int tp4cnt, tp4flag, tp4sock, tpipcnt, tpipflag, tpipsock, udpflag;
char *cp, **cpp;
/* Save start and extent of argv for setproctitle. */
Argv = argv;
if (envp == 0 || *envp == 0)
envp = argv;
while (*envp)
envp++;
LastArg = envp[-1] + strlen(envp[-1]);
#define MAXNFSDCNT 20
#define DEFNFSDCNT 4
nfsdcnt = DEFNFSDCNT;
cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
tpipflag = udpflag = 0;
#ifdef ISO
#define GETOPT "cn:rtu"
#define USAGE "[-crtu] [-n num_servers]"
#else
#define GETOPT "n:rtu"
#define USAGE "[-rtu] [-n num_servers]"
#endif
while ((ch = getopt(argc, argv, GETOPT)) != EOF)
switch (ch) {
case 'n':
nfsdcnt = atoi(optarg);
if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
nfsdcnt = DEFNFSDCNT;
}
break;
case 'r':
reregister = 1;
break;
case 't':
tcpflag = 1;
break;
case 'u':
udpflag = 1;
break;
#ifdef ISO
case 'c':
cltpflag = 1;
break;
#ifdef notyet
case 'i':
tp4cnt = 1;
break;
case 'p':
tpipcnt = 1;
break;
#endif /* notyet */
#endif /* ISO */
default:
case '?':
usage();
};
argv += optind;
argc -= optind;
/*
* XXX
* Backward compatibility, trailing number is the count of daemons.
*/
if (argc > 1)
usage();
if (argc == 1) {
nfsdcnt = atoi(argv[0]);
if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
nfsdcnt = DEFNFSDCNT;
}
}
if (debug == 0) {
daemon(0, 0);
(void)signal(SIGHUP, SIG_IGN);
(void)signal(SIGINT, SIG_IGN);
(void)signal(SIGQUIT, SIG_IGN);
(void)signal(SIGSYS, nonfs);
(void)signal(SIGTERM, SIG_IGN);
}
(void)signal(SIGCHLD, reapchild);
if (reregister) {
if (udpflag &&
!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT))
err(1, "can't register with portmap for UDP.");
if (tcpflag &&
!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT))
err(1, "can't register with portmap for TCP.");
exit(0);
}
openlog("nfsd:", LOG_PID, LOG_DAEMON);
for (i = 0; i < nfsdcnt; i++) {
switch (fork()) {
case -1:
syslog(LOG_ERR, "fork: %m");
exit (1);
case 0:
break;
default:
continue;
}
setproctitle("nfsd-srv");
nfssvc_flag = NFSSVC_NFSD;
nsd.nsd_nfsd = NULL;
#ifdef KERBEROS
nsd.nsd_authstr = (char *)kt.dat;
#endif
while (nfssvc(nfssvc_flag, &nsd) < 0) {
if (errno != ENEEDAUTH) {
syslog(LOG_ERR, "nfssvc: %m");
exit(1);
}
nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
#ifdef KERBEROS
kt.length = nsd.nsd_authlen;
kt.mbz = 0;
(void)strcpy(inst, "*");
if (krb_rd_req(&kt, "rcmd",
inst, nsd.nsd_haddr, &auth, "") == RD_AP_OK &&
krb_kntoln(&auth, lnam) == KSUCCESS &&
(pwd = getpwnam(lnam)) != NULL) {
cr = &nsd.nsd_cr;
cr->cr_uid = pwd->pw_uid;
cr->cr_groups[0] = pwd->pw_gid;
cr->cr_ngroups = 1;
setgrent();
while ((grp = getgrent()) != NULL) {
if (grp->gr_gid == cr->cr_groups[0])
continue;
for (cpp = grp->gr_mem;
*cpp != NULL; ++cpp)
if (!strcmp(*cpp, lnam))
break;
if (*cpp == NULL)
continue;
cr->cr_groups[cr->cr_ngroups++]
= grp->gr_gid;
if (cr->cr_ngroups == NGROUPS)
break;
}
endgrent();
nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
}
#endif /* KERBEROS */
}
exit(0);
}
/* If we are serving udp, set up the socket. */
if (udpflag) {
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
syslog(LOG_ERR, "can't create udp socket");
exit(1);
}
inetaddr.sin_family = AF_INET;
inetaddr.sin_addr.s_addr = INADDR_ANY;
inetaddr.sin_port = htons(NFS_PORT);
inetaddr.sin_len = sizeof(inetaddr);
if (bind(sock,
(struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
syslog(LOG_ERR, "can't bind udp addr");
exit(1);
}
if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
syslog(LOG_ERR, "can't register with udp portmap");
exit(1);
}
nfsdargs.sock = sock;
nfsdargs.name = NULL;
nfsdargs.namelen = 0;
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
syslog(LOG_ERR, "can't Add UDP socket");
exit(1);
}
(void)close(sock);
}
#ifdef ISO
/* If we are serving cltp, set up the socket. */
if (cltpflag) {
if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
syslog(LOG_ERR, "can't create cltp socket");
exit(1);
}
memset(&isoaddr, 0, sizeof(isoaddr));
isoaddr.siso_family = AF_ISO;
isoaddr.siso_tlen = 2;
cp = TSEL(&isoaddr);
*cp++ = (NFS_PORT >> 8);
*cp = (NFS_PORT & 0xff);
isoaddr.siso_len = sizeof(isoaddr);
if (bind(sock,
(struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
syslog(LOG_ERR, "can't bind cltp addr");
exit(1);
}
#ifdef notyet
/*
* XXX
* Someday this should probably use "rpcbind", the son of
* portmap.
*/
if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
syslog(LOG_ERR, "can't register with udp portmap");
exit(1);
}
#endif /* notyet */
nfsdargs.sock = sock;
nfsdargs.name = NULL;
nfsdargs.namelen = 0;
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
syslog(LOG_ERR, "can't add UDP socket");
exit(1);
}
close(sock);
}
#endif /* ISO */
/* Now set up the master server socket waiting for tcp connections. */
on = 1;
FD_ZERO(&sockbits);
connect_type_cnt = 0;
if (tcpflag) {
if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
syslog(LOG_ERR, "can't create tcp socket");
exit(1);
}
if (setsockopt(tcpsock,
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
inetaddr.sin_family = AF_INET;
inetaddr.sin_addr.s_addr = INADDR_ANY;
inetaddr.sin_port = htons(NFS_PORT);
inetaddr.sin_len = sizeof(inetaddr);
if (bind(tcpsock,
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
syslog(LOG_ERR, "can't bind tcp addr");
exit(1);
}
if (listen(tcpsock, 5) < 0) {
syslog(LOG_ERR, "listen failed");
exit(1);
}
if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
syslog(LOG_ERR, "can't register tcp with portmap");
exit(1);
}
FD_SET(tcpsock, &sockbits);
maxsock = tcpsock;
connect_type_cnt++;
}
#ifdef notyet
/* Now set up the master server socket waiting for tp4 connections. */
if (tp4flag) {
if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
syslog(LOG_ERR, "can't create tp4 socket");
exit(1);
}
if (setsockopt(tp4sock,
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
memset(&isoaddr, 0, sizeof(isoaddr));
isoaddr.siso_family = AF_ISO;
isoaddr.siso_tlen = 2;
cp = TSEL(&isoaddr);
*cp++ = (NFS_PORT >> 8);
*cp = (NFS_PORT & 0xff);
isoaddr.siso_len = sizeof(isoaddr);
if (bind(tp4sock,
(struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
syslog(LOG_ERR, "can't bind tp4 addr");
exit(1);
}
if (listen(tp4sock, 5) < 0) {
syslog(LOG_ERR, "listen failed");
exit(1);
}
/*
* XXX
* Someday this should probably use "rpcbind", the son of
* portmap.
*/
if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
syslog(LOG_ERR, "can't register tcp with portmap");
exit(1);
}
FD_SET(tp4sock, &sockbits);
maxsock = tp4sock;
connect_type_cnt++;
}
/* Now set up the master server socket waiting for tpip connections. */
if (tpipflag) {
if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
syslog(LOG_ERR, "can't create tpip socket");
exit(1);
}
if (setsockopt(tpipsock,
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
inetaddr.sin_family = AF_INET;
inetaddr.sin_addr.s_addr = INADDR_ANY;
inetaddr.sin_port = htons(NFS_PORT);
inetaddr.sin_len = sizeof(inetaddr);
if (bind(tpipsock,
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
syslog(LOG_ERR, "can't bind tcp addr");
exit(1);
}
if (listen(tpipsock, 5) < 0) {
syslog(LOG_ERR, "listen failed");
exit(1);
}
/*
* XXX
* Someday this should probably use "rpcbind", the son of
* portmap.
*/
if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
syslog(LOG_ERR, "can't register tcp with portmap");
exit(1);
}
FD_SET(tpipsock, &sockbits);
maxsock = tpipsock;
connect_type_cnt++;
}
#endif /* notyet */
if (connect_type_cnt == 0)
exit(0);
setproctitle("nfsd-master");
/*
* Loop forever accepting connections and passing the sockets
* into the kernel for the mounts.
*/
for (;;) {
ready = sockbits;
if (connect_type_cnt > 1) {
if (select(maxsock + 1,
&ready, NULL, NULL, NULL) < 1) {
syslog(LOG_ERR, "select failed: %m");
exit(1);
}
}
if (tcpflag && FD_ISSET(tcpsock, &ready)) {
len = sizeof(inetpeer);
if ((msgsock = accept(tcpsock,
(struct sockaddr *)&inetpeer, &len)) < 0) {
syslog(LOG_ERR, "accept failed: %m");
exit(1);
}
memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
if (setsockopt(msgsock, SOL_SOCKET,
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR,
"setsockopt SO_KEEPALIVE: %m");
nfsdargs.sock = msgsock;
nfsdargs.name = (caddr_t)&inetpeer;
nfsdargs.namelen = sizeof(inetpeer);
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
(void)close(msgsock);
}
#ifdef notyet
if (tp4flag && FD_ISSET(tp4sock, &ready)) {
len = sizeof(isopeer);
if ((msgsock = accept(tp4sock,
(struct sockaddr *)&isopeer, &len)) < 0) {
syslog(LOG_ERR, "accept failed: %m");
exit(1);
}
if (setsockopt(msgsock, SOL_SOCKET,
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR,
"setsockopt SO_KEEPALIVE: %m");
nfsdargs.sock = msgsock;
nfsdargs.name = (caddr_t)&isopeer;
nfsdargs.namelen = len;
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
(void)close(msgsock);
}
if (tpipflag && FD_ISSET(tpipsock, &ready)) {
len = sizeof(inetpeer);
if ((msgsock = accept(tpipsock,
(struct sockaddr *)&inetpeer, &len)) < 0) {
syslog(LOG_ERR, "Accept failed: %m");
exit(1);
}
if (setsockopt(msgsock, SOL_SOCKET,
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
nfsdargs.sock = msgsock;
nfsdargs.name = (caddr_t)&inetpeer;
nfsdargs.namelen = len;
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
(void)close(msgsock);
}
#endif /* notyet */
}
}
void
usage()
{
(void)fprintf(stderr, "nfsd %s\n", USAGE);
exit(1);
}
void
nonfs(signo)
int signo;
{
syslog(LOG_ERR, "missing system call: NFS not available.");
}
void
reapchild(signo)
int signo;
{
while (wait3(NULL, WNOHANG, NULL));
}
void
setproctitle(a)
char *a;
{
register char *cp;
char buf[80];
cp = Argv[0];
(void)snprintf(buf, sizeof(buf), "%s", a);
(void)strncpy(cp, buf, LastArg - cp);
cp += strlen(cp);
while (cp < LastArg)
*cp++ = '\0';
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.