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/*
* nfsd
*
* This is the user level part of nfsd. This is very primitive, because
* all the work is now done in the kernel module.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <netdb.h>
#include <libgen.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sched.h>
#include "conffile.h"
#include "nfslib.h"
#include "nfssvc.h"
#include "xlog.h"
#include "xcommon.h"
#ifndef NFSD_NPROC
#define NFSD_NPROC 16
#endif
static void usage(const char *);
static struct option longopts[] =
{
{ "host", 1, 0, 'H' },
{ "scope", 1, 0, 'S'},
{ "help", 0, 0, 'h' },
{ "no-nfs-version", 1, 0, 'N' },
{ "nfs-version", 1, 0, 'V' },
{ "tcp", 0, 0, 't' },
{ "no-tcp", 0, 0, 'T' },
{ "udp", 0, 0, 'u' },
{ "no-udp", 0, 0, 'U' },
{ "port", 1, 0, 'P' },
{ "port", 1, 0, 'p' },
{ "debug", 0, 0, 'd' },
{ "syslog", 0, 0, 's' },
{ "rdma", 2, 0, 'R' },
{ "grace-time", 1, 0, 'G'},
{ "lease-time", 1, 0, 'L'},
{ NULL, 0, 0, 0 }
};
inline static void
read_nfsd_conf(void)
{
conf_init_file(NFS_CONFFILE);
xlog_set_debug("nfsd");
}
int
main(int argc, char **argv)
{
int count = NFSD_NPROC, c, i, j, error = 0, portnum, fd, found_one;
char *p, *progname, *port, *rdma_port = NULL;
char **haddr = NULL;
char *scope = NULL;
int hcounter = 0;
struct conf_list *hosts;
int socket_up = 0;
unsigned int minorvers = NFSCTL_MINDEFAULT;
unsigned int minorversset = NFSCTL_MINDEFAULT;
unsigned int minormask = 0;
unsigned int versbits = NFSCTL_VERDEFAULT;
unsigned int protobits = NFSCTL_PROTODEFAULT;
int grace = -1;
int lease = -1;
int force4dot0 = 0;
progname = basename(argv[0]);
haddr = xmalloc(sizeof(char *));
haddr[0] = NULL;
xlog_syslog(0);
xlog_stderr(1);
/* Read in config setting */
read_nfsd_conf();
nfssvc_get_minormask(&minormask);
count = conf_get_num("nfsd", "threads", count);
grace = conf_get_num("nfsd", "grace-time", grace);
lease = conf_get_num("nfsd", "lease-time", lease);
port = conf_get_str("nfsd", "port");
if (!port)
port = "nfs";
if (conf_get_bool("nfsd", "rdma", false)) {
rdma_port = conf_get_str("nfsd", "rdma-port");
if (!rdma_port)
rdma_port = "nfsrdma";
}
/* backward compatibility - nfs.conf used to set rdma port directly */
if (!rdma_port)
rdma_port = conf_get_str("nfsd", "rdma");
if (conf_get_bool("nfsd", "udp", NFSCTL_UDPISSET(protobits)))
NFSCTL_UDPSET(protobits);
else
NFSCTL_UDPUNSET(protobits);
if (conf_get_bool("nfsd", "tcp", NFSCTL_TCPISSET(protobits)))
NFSCTL_TCPSET(protobits);
else
NFSCTL_TCPUNSET(protobits);
for (i = 2; i <= 4; i++) {
char tag[20];
sprintf(tag, "vers%d", i);
if (conf_get_bool("nfsd", tag, NFSCTL_VERISSET(versbits, i))) {
NFSCTL_VERSET(versbits, i);
if (i == 4)
minorvers = minorversset = minormask;
} else {
NFSCTL_VERUNSET(versbits, i);
if (i == 4) {
minorvers = 0;
minorversset = minormask;
}
}
}
/* We assume the kernel will default all minor versions to 'on',
* and allow the config file to disable some.
*/
for (i = NFS4_MINMINOR; i <= NFS4_MAXMINOR; i++) {
char tag[20];
sprintf(tag, "vers4.%d", i);
/* The default for minor version support is to let the
* kernel decide. We could ask the kernel what that choice
* will be, but that is needlessly complex.
* Instead, perform a config-file lookup using each of the
* two possible default. If the result is different from the
* default, then impose that value, else don't make a change
* (i.e. don't set the bit in minorversset).
*/
if (!conf_get_bool("nfsd", tag, 1)) {
NFSCTL_MINORSET(minorversset, i);
NFSCTL_MINORUNSET(minorvers, i);
if (i == 0)
force4dot0 = 1;
}
if (conf_get_bool("nfsd", tag, 0)) {
NFSCTL_MINORSET(minorversset, i);
NFSCTL_MINORSET(minorvers, i);
if (i == 0)
force4dot0 = 1;
}
}
hosts = conf_get_list("nfsd", "host");
if (hosts && hosts->cnt) {
struct conf_list_node *n;
haddr = realloc(haddr, sizeof(char*) * hosts->cnt);
TAILQ_FOREACH(n, &(hosts->fields), link) {
haddr[hcounter] = n->field;
hcounter++;
}
}
scope = conf_get_str("nfsd", "scope");
while ((c = getopt_long(argc, argv, "dH:S:hN:V:p:P:stTuUrG:L:", longopts, NULL)) != EOF) {
switch(c) {
case 'd':
xlog_config(D_ALL, 1);
break;
case 'H':
if (hosts) {
hosts = NULL;
hcounter = 0;
}
if (hcounter) {
haddr = realloc(haddr, sizeof(char*) * hcounter+1);
if(!haddr) {
fprintf(stderr, "%s: unable to allocate "
"memory.\n", progname);
exit(1);
}
}
haddr[hcounter] = optarg;
hcounter++;
break;
case 'S':
scope = optarg;
break;
case 'P': /* XXX for nfs-server compatibility */
case 'p':
/* only the last -p option has any effect */
port = optarg;
break;
case 'r':
rdma_port = "nfsrdma";
break;
case 'R': /* --rdma */
if (optarg)
rdma_port = optarg;
else
rdma_port = "nfsrdma";
break;
case 'N':
switch((c = strtol(optarg, &p, 0))) {
case 4:
if (*p == '.') {
int i = atoi(p+1);
if (i < 0 || i > NFS4_MAXMINOR) {
fprintf(stderr, "%s: unsupported minor version\n", optarg);
exit(1);
}
NFSCTL_MINORSET(minorversset, i);
NFSCTL_MINORUNSET(minorvers, i);
if (i == 0)
force4dot0 = 1;
if (minorvers != 0)
break;
} else {
minorvers = 0;
minorversset = minormask;
}
/* FALLTHRU */
case 3:
NFSCTL_VERUNSET(versbits, c);
break;
default:
fprintf(stderr, "%s: Unsupported version\n", optarg);
exit(1);
}
break;
case 'V':
switch((c = strtol(optarg, &p, 0))) {
case 4:
if (*p == '.') {
int i = atoi(p+1);
if (i < 0 || i > NFS4_MAXMINOR) {
fprintf(stderr, "%s: unsupported minor version\n", optarg);
exit(1);
}
NFSCTL_MINORSET(minorversset, i);
NFSCTL_MINORSET(minorvers, i);
if (i == 0)
force4dot0 = 1;
} else
minorvers = minorversset = minormask;
/* FALLTHRU */
case 3:
NFSCTL_VERSET(versbits, c);
break;
default:
fprintf(stderr, "%s: Unsupported version\n", optarg);
exit(1);
}
break;
case 's':
xlog_syslog(1);
xlog_stderr(0);
break;
case 't':
NFSCTL_TCPSET(protobits);
break;
case 'T':
NFSCTL_TCPUNSET(protobits);
break;
case 'u':
NFSCTL_UDPSET(protobits);
break;
case 'U':
NFSCTL_UDPUNSET(protobits);
break;
case 'G':
grace = strtol(optarg, &p, 0);
if (*p || grace <= 0) {
fprintf(stderr, "%s: Unrecognized grace time.\n", optarg);
exit(1);
}
break;
case 'L':
lease = strtol(optarg, &p, 0);
if (*p || lease <= 0) {
fprintf(stderr, "%s: Unrecognized lease time.\n", optarg);
exit(1);
}
break;
default:
fprintf(stderr, "Invalid argument: '%c'\n", c);
/* FALLTHRU */
case 'h':
usage(progname);
}
}
if (optind < argc) {
if ((count = atoi(argv[optind])) < 0) {
/* insane # of servers */
fprintf(stderr,
"%s: invalid server count (%d), using 1\n",
argv[0], count);
count = 1;
} else if (count == 0) {
/*
* don't bother setting anything else if the threads
* are coming down anyway.
*/
socket_up = 1;
goto set_threads;
}
}
xlog_open(progname);
portnum = strtol(port, &p, 0);
if (!*p && (portnum <= 0 || portnum > 65535)) {
/* getaddrinfo will catch other errors, but not
* out-of-range numbers.
*/
xlog(L_ERROR, "invalid port number: %s", port);
exit(1);
}
/*
* Make sure that at least one version is enabled. Note that we might
* need to check the minorvers bit field twice - first while handling
* major version 4 in versbits, and again if no major verions were
* enabled in versbits.
*/
found_one = 0;
for (i = NFSD_MINVERS; i <= NFSD_MAXVERS; i++) {
if (NFSCTL_VERISSET(versbits, i)) {
if (i == 4) {
for (j = NFS4_MINMINOR; j <= NFS4_MAXMINOR; j++) {
if (NFSCTL_MINORISSET(minorvers, j))
found_one = 1;
}
} else {
found_one = 1;
}
}
}
if (!found_one) {
for (i = NFS4_MINMINOR; i <= NFS4_MAXMINOR; i++) {
if (NFSCTL_MINORISSET(minorvers, i))
found_one = 1;
}
}
if (!found_one) {
xlog(L_ERROR, "no version specified");
exit(1);
}
if (NFSCTL_VERISSET(versbits, 4) &&
!NFSCTL_TCPISSET(protobits)) {
xlog(L_ERROR, "version 4 requires the TCP protocol");
exit(1);
}
if (chdir(NFS_STATEDIR)) {
xlog(L_ERROR, "chdir(%s) failed: %m", NFS_STATEDIR);
exit(1);
}
/* make sure nfsdfs is mounted if it's available */
nfssvc_mount_nfsdfs(progname);
/* can only change number of threads if nfsd is already up */
if (nfssvc_inuse()) {
socket_up = 1;
goto set_threads;
}
/*
* Must set versions before the fd's so that the right versions get
* registered with rpcbind. Note that on older kernels w/o the right
* interfaces, these are a no-op.
* Timeouts must also be set before ports are created else we get
* EBUSY.
*/
nfssvc_setvers(versbits, minorvers, minorversset, force4dot0);
if (grace > 0)
nfssvc_set_time("grace", grace);
if (lease > 0)
nfssvc_set_time("lease", lease);
if (scope) {
if (unshare(CLONE_NEWUTS) < 0 ||
sethostname(scope, strlen(scope)) < 0) {
xlog(L_ERROR, "Unable to set server scope: %m");
error = -1;
goto out;
}
}
i = 0;
do {
error = nfssvc_set_sockets(protobits, haddr[i], port);
if (!error)
socket_up = 1;
} while (++i < hcounter);
if (rdma_port) {
error = nfssvc_set_rdmaport(rdma_port);
if (!error)
socket_up = 1;
}
set_threads:
/* don't start any threads if unable to hand off any sockets */
if (!socket_up) {
xlog(L_ERROR, "unable to set any sockets for nfsd");
goto out;
}
error = 0;
/*
* KLUDGE ALERT:
* Some kernels let nfsd kernel threads inherit open files
* from the program that spawns them (i.e. us). So close
* everything before spawning kernel threads. --Chip
*/
fd = open("/dev/null", O_RDWR);
if (fd == -1)
xlog(L_ERROR, "Unable to open /dev/null: %m");
else {
/* switch xlog output to syslog since stderr is being closed */
xlog_syslog(1);
xlog_stderr(0);
(void) dup2(fd, 0);
(void) dup2(fd, 1);
(void) dup2(fd, 2);
}
closeall(3);
if ((error = nfssvc_threads(count)) < 0)
xlog(L_ERROR, "error starting threads: errno %d (%m)", errno);
out:
free(haddr);
return (error != 0);
}
static void
usage(const char *prog)
{
fprintf(stderr, "Usage:\n"
"%s [-d|--debug] [-H hostname] [-p|-P|--port port]\n"
" [-N|--no-nfs-version version] [-V|--nfs-version version]\n"
" [-s|--syslog] [-t|--tcp] [-T|--no-tcp] [-u|--udp] [-U|--no-udp]\n"
" [-r|--rdma=] [-G|--grace-time secs] [-L|--leasetime secs] nrservs\n",
prog);
exit(2);
}
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