a9148abd9d
and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
891 lines
23 KiB
C
891 lines
23 KiB
C
/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)nfsd.c 8.9 (Berkeley) 3/29/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/syslog.h>
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#include <sys/wait.h>
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#include <sys/mount.h>
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#include <sys/linker.h>
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#include <sys/module.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsserver/nfs.h>
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#include <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netdb.h>
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/* Global defs */
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#ifdef DEBUG
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#define syslog(e, s...) fprintf(stderr,s)
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int debug = 1;
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#else
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int debug = 0;
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#endif
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#define MAXNFSDCNT 256
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#define DEFNFSDCNT 4
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pid_t children[MAXNFSDCNT]; /* PIDs of children */
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int nfsdcnt; /* number of children */
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int new_syscall;
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void cleanup(int);
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void child_cleanup(int);
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void killchildren(void);
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void nfsd_exit(int);
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void nonfs(int);
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void reapchild(int);
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int setbindhost(struct addrinfo **ia, const char *bindhost,
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struct addrinfo hints);
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void start_server(int);
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void unregistration(void);
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void usage(void);
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/*
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* Nfs server daemon mostly just a user context for nfssvc()
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*
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* 1 - do file descriptor and signal cleanup
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* 2 - fork the nfsd(s)
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* 3 - create server socket(s)
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* 4 - register socket with rpcbind
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*
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* For connectionless protocols, just pass the socket into the kernel via.
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* nfssvc().
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* For connection based sockets, loop doing accepts. When you get a new
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* socket from accept, pass the msgsock into the kernel via. nfssvc().
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* The arguments are:
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* -r - reregister with rpcbind
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* -d - unregister with rpcbind
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* -t - support tcp nfs clients
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* -u - support udp nfs clients
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* followed by "n" which is the number of nfsds' to fork off
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*/
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int
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main(int argc, char **argv)
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{
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struct nfsd_addsock_args addsockargs;
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struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints;
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struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6;
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struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6;
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struct sockaddr_in inetpeer;
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struct sockaddr_in6 inet6peer;
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fd_set ready, sockbits;
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fd_set v4bits, v6bits;
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int ch, connect_type_cnt, i, maxsock, msgsock;
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socklen_t len;
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int on = 1, unregister, reregister, sock;
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int tcp6sock, ip6flag, tcpflag, tcpsock;
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int udpflag, ecode, s, srvcnt;
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int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
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char **bindhost = NULL;
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pid_t pid;
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if (modfind("nfsserver") < 0) {
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/* Not present in kernel, try loading it */
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if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0)
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errx(1, "NFS server is not available");
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}
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nfsdcnt = DEFNFSDCNT;
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unregister = reregister = tcpflag = maxsock = 0;
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bindanyflag = udpflag = connect_type_cnt = bindhostc = 0;
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#define GETOPT "ah:n:rdtu"
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#define USAGE "[-ardtu] [-n num_servers] [-h bindip]"
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while ((ch = getopt(argc, argv, GETOPT)) != -1)
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switch (ch) {
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case 'a':
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bindanyflag = 1;
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break;
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case 'n':
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nfsdcnt = atoi(optarg);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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warnx("nfsd count %d; reset to %d", nfsdcnt,
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DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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break;
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case 'h':
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup(optarg);
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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break;
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case 'r':
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reregister = 1;
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break;
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case 'd':
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unregister = 1;
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break;
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case 't':
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tcpflag = 1;
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break;
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case 'u':
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udpflag = 1;
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break;
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default:
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case '?':
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usage();
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};
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if (!tcpflag && !udpflag)
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udpflag = 1;
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argv += optind;
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argc -= optind;
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/*
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* XXX
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* Backward compatibility, trailing number is the count of daemons.
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*/
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if (argc > 1)
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usage();
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if (argc == 1) {
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nfsdcnt = atoi(argv[0]);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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warnx("nfsd count %d; reset to %d", nfsdcnt,
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DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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}
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ip6flag = 1;
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s == -1) {
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if (errno != EPROTONOSUPPORT)
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err(1, "socket");
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ip6flag = 0;
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} else if (getnetconfigent("udp6") == NULL ||
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getnetconfigent("tcp6") == NULL) {
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ip6flag = 0;
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}
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if (s != -1)
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close(s);
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if (bindhostc == 0 || bindanyflag) {
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup("*");
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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}
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if (unregister) {
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unregistration();
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exit (0);
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}
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if (reregister) {
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if (udpflag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
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if (ecode != 0)
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err(1, "getaddrinfo udp: %s", gai_strerror(ecode));
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nconf_udp = getnetconfigent("udp");
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if (nconf_udp == NULL)
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err(1, "getnetconfigent udp failed");
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nb_udp.buf = ai_udp->ai_addr;
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nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp, &nb_udp)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_udp, &nb_udp)))
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err(1, "rpcb_set udp failed");
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freeaddrinfo(ai_udp);
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}
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if (udpflag && ip6flag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
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if (ecode != 0)
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err(1, "getaddrinfo udp6: %s", gai_strerror(ecode));
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nconf_udp6 = getnetconfigent("udp6");
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if (nconf_udp6 == NULL)
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err(1, "getnetconfigent udp6 failed");
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nb_udp6.buf = ai_udp6->ai_addr;
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nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp6, &nb_udp6)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_udp6, &nb_udp6)))
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err(1, "rpcb_set udp6 failed");
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freeaddrinfo(ai_udp6);
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}
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if (tcpflag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp);
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if (ecode != 0)
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err(1, "getaddrinfo tcp: %s", gai_strerror(ecode));
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nconf_tcp = getnetconfigent("tcp");
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if (nconf_tcp == NULL)
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err(1, "getnetconfigent tcp failed");
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nb_tcp.buf = ai_tcp->ai_addr;
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nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp, &nb_tcp)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp, &nb_tcp)))
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err(1, "rpcb_set tcp failed");
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freeaddrinfo(ai_tcp);
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}
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if (tcpflag && ip6flag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
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if (ecode != 0)
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err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode));
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nconf_tcp6 = getnetconfigent("tcp6");
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if (nconf_tcp6 == NULL)
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err(1, "getnetconfigent tcp6 failed");
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nb_tcp6.buf = ai_tcp6->ai_addr;
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nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp6, &nb_tcp6)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp6, &nb_tcp6)))
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err(1, "rpcb_set tcp6 failed");
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freeaddrinfo(ai_tcp6);
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}
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exit (0);
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}
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if (debug == 0) {
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daemon(0, 0);
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(void)signal(SIGHUP, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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/*
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* nfsd sits in the kernel most of the time. It needs
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* to ignore SIGTERM/SIGQUIT in order to stay alive as long
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* as possible during a shutdown, otherwise loopback
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* mounts will not be able to unmount.
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*/
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(void)signal(SIGTERM, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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}
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(void)signal(SIGSYS, nonfs);
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(void)signal(SIGCHLD, reapchild);
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openlog("nfsd", LOG_PID, LOG_DAEMON);
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/*
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* Figure out if the kernel supports the new-style
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* NFSSVC_NFSD. Old kernels will return ENXIO because they
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* don't recognise the flag value, new ones will return EINVAL
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* because argp is NULL.
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*/
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new_syscall = FALSE;
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if (nfssvc(NFSSVC_NFSD, NULL) < 0 && errno == EINVAL)
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new_syscall = TRUE;
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new_syscall = FALSE;
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if (!new_syscall) {
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/* If we use UDP only, we start the last server below. */
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srvcnt = tcpflag ? nfsdcnt : nfsdcnt - 1;
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for (i = 0; i < srvcnt; i++) {
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switch ((pid = fork())) {
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case -1:
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syslog(LOG_ERR, "fork: %m");
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nfsd_exit(1);
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case 0:
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break;
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default:
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children[i] = pid;
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continue;
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}
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(void)signal(SIGUSR1, child_cleanup);
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setproctitle("server");
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start_server(0);
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}
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} else if (tcpflag) {
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/*
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* For TCP mode, we fork once to start the first
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* kernel nfsd thread. The kernel will add more
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* threads as needed.
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*/
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pid = fork();
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if (pid == -1) {
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syslog(LOG_ERR, "fork: %m");
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nfsd_exit(1);
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}
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if (pid) {
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children[0] = pid;
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} else {
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(void)signal(SIGUSR1, child_cleanup);
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setproctitle("server");
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start_server(0);
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}
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}
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(void)signal(SIGUSR1, cleanup);
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FD_ZERO(&v4bits);
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FD_ZERO(&v6bits);
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FD_ZERO(&sockbits);
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rpcbregcnt = 0;
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/* Set up the socket for udp and rpcb register it. */
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if (udpflag) {
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rpcbreg = 0;
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for (i = 0; i < bindhostc; i++) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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if (setbindhost(&ai_udp, bindhost[i], hints) == 0) {
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rpcbreg = 1;
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rpcbregcnt++;
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if ((sock = socket(ai_udp->ai_family,
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ai_udp->ai_socktype,
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ai_udp->ai_protocol)) < 0) {
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syslog(LOG_ERR,
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"can't create udp socket");
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nfsd_exit(1);
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}
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if (bind(sock, ai_udp->ai_addr,
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ai_udp->ai_addrlen) < 0) {
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syslog(LOG_ERR,
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"can't bind udp addr %s: %m",
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bindhost[i]);
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nfsd_exit(1);
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}
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freeaddrinfo(ai_udp);
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addsockargs.sock = sock;
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addsockargs.name = NULL;
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addsockargs.namelen = 0;
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if (nfssvc(NFSSVC_ADDSOCK, &addsockargs) < 0) {
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syslog(LOG_ERR, "can't Add UDP socket");
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nfsd_exit(1);
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}
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(void)close(sock);
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}
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}
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if (rpcbreg == 1) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
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if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo udp: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_udp = getnetconfigent("udp");
|
|
if (nconf_udp == NULL)
|
|
err(1, "getnetconfigent udp failed");
|
|
nb_udp.buf = ai_udp->ai_addr;
|
|
nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp, &nb_udp)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_udp, &nb_udp)))
|
|
err(1, "rpcb_set udp failed");
|
|
freeaddrinfo(ai_udp);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for udp6 and rpcb register it. */
|
|
if (udpflag && ip6flag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
if (setbindhost(&ai_udp6, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((sock = socket(ai_udp6->ai_family,
|
|
ai_udp6->ai_socktype,
|
|
ai_udp6->ai_protocol)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create udp6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
&on, sizeof on) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't set v6-only binding for "
|
|
"udp6 socket: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
if (bind(sock, ai_udp6->ai_addr,
|
|
ai_udp6->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind udp6 addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_udp6);
|
|
addsockargs.sock = sock;
|
|
addsockargs.name = NULL;
|
|
addsockargs.namelen = 0;
|
|
if (nfssvc(NFSSVC_ADDSOCK, &addsockargs) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't add UDP6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
(void)close(sock);
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo udp6: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_udp6 = getnetconfigent("udp6");
|
|
if (nconf_udp6 == NULL)
|
|
err(1, "getnetconfigent udp6 failed");
|
|
nb_udp6.buf = ai_udp6->ai_addr;
|
|
nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp6, &nb_udp6)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_udp6, &nb_udp6)))
|
|
err(1, "rpcb_set udp6 failed");
|
|
freeaddrinfo(ai_udp6);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for tcp and rpcb register it. */
|
|
if (tcpflag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
if (setbindhost(&ai_tcp, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((tcpsock = socket(AF_INET, SOCK_STREAM,
|
|
0)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create tpc socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(tcpsock, SOL_SOCKET,
|
|
SO_REUSEADDR,
|
|
(char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_REUSEADDR: %m");
|
|
if (bind(tcpsock, ai_tcp->ai_addr,
|
|
ai_tcp->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind tcp addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
if (listen(tcpsock, 5) < 0) {
|
|
syslog(LOG_ERR, "listen failed");
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_tcp);
|
|
FD_SET(tcpsock, &sockbits);
|
|
FD_SET(tcpsock, &v4bits);
|
|
maxsock = tcpsock;
|
|
connect_type_cnt++;
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints,
|
|
&ai_tcp);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo tcp: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_tcp = getnetconfigent("tcp");
|
|
if (nconf_tcp == NULL)
|
|
err(1, "getnetconfigent tcp failed");
|
|
nb_tcp.buf = ai_tcp->ai_addr;
|
|
nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp,
|
|
&nb_tcp)) || (!rpcb_set(RPCPROG_NFS, 3,
|
|
nconf_tcp, &nb_tcp)))
|
|
err(1, "rpcb_set tcp failed");
|
|
freeaddrinfo(ai_tcp);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for tcp6 and rpcb register it. */
|
|
if (tcpflag && ip6flag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
if (setbindhost(&ai_tcp6, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((tcp6sock = socket(ai_tcp6->ai_family,
|
|
ai_tcp6->ai_socktype,
|
|
ai_tcp6->ai_protocol)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create tcp6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(tcp6sock, SOL_SOCKET,
|
|
SO_REUSEADDR,
|
|
(char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_REUSEADDR: %m");
|
|
if (setsockopt(tcp6sock, IPPROTO_IPV6,
|
|
IPV6_V6ONLY, &on, sizeof on) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't set v6-only binding for tcp6 "
|
|
"socket: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
if (bind(tcp6sock, ai_tcp6->ai_addr,
|
|
ai_tcp6->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind tcp6 addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
if (listen(tcp6sock, 5) < 0) {
|
|
syslog(LOG_ERR, "listen failed");
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_tcp6);
|
|
FD_SET(tcp6sock, &sockbits);
|
|
FD_SET(tcp6sock, &v6bits);
|
|
if (maxsock < tcp6sock)
|
|
maxsock = tcp6sock;
|
|
connect_type_cnt++;
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo tcp6: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_tcp6 = getnetconfigent("tcp6");
|
|
if (nconf_tcp6 == NULL)
|
|
err(1, "getnetconfigent tcp6 failed");
|
|
nb_tcp6.buf = ai_tcp6->ai_addr;
|
|
nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp6, &nb_tcp6)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp6, &nb_tcp6)))
|
|
err(1, "rpcb_set tcp6 failed");
|
|
freeaddrinfo(ai_tcp6);
|
|
}
|
|
}
|
|
|
|
if (rpcbregcnt == 0) {
|
|
syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
|
|
if (tcpflag && connect_type_cnt == 0) {
|
|
syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
|
|
setproctitle("master");
|
|
/*
|
|
* We always want a master to have a clean way to to shut nfsd down
|
|
* (with unregistration): if the master is killed, it unregisters and
|
|
* kills all children. If we run for UDP only (and so do not have to
|
|
* loop waiting waiting for accept), we instead make the parent
|
|
* a "server" too. start_server will not return.
|
|
*/
|
|
if (!tcpflag)
|
|
start_server(1);
|
|
|
|
/*
|
|
* 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");
|
|
if (errno == EINTR)
|
|
continue;
|
|
nfsd_exit(1);
|
|
}
|
|
}
|
|
for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
|
|
if (FD_ISSET(tcpsock, &ready)) {
|
|
if (FD_ISSET(tcpsock, &v4bits)) {
|
|
len = sizeof(inetpeer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
if (errno == ECONNABORTED ||
|
|
errno == EINTR)
|
|
continue;
|
|
nfsd_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");
|
|
addsockargs.sock = msgsock;
|
|
addsockargs.name = (caddr_t)&inetpeer;
|
|
addsockargs.namelen = len;
|
|
nfssvc(NFSSVC_ADDSOCK, &addsockargs);
|
|
(void)close(msgsock);
|
|
} else if (FD_ISSET(tcpsock, &v6bits)) {
|
|
len = sizeof(inet6peer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inet6peer,
|
|
&len)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"accept failed: %m");
|
|
if (errno == ECONNABORTED ||
|
|
errno == EINTR)
|
|
continue;
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(msgsock, SOL_SOCKET,
|
|
SO_KEEPALIVE, (char *)&on,
|
|
sizeof(on)) < 0)
|
|
syslog(LOG_ERR, "setsockopt "
|
|
"SO_KEEPALIVE: %m");
|
|
addsockargs.sock = msgsock;
|
|
addsockargs.name = (caddr_t)&inet6peer;
|
|
addsockargs.namelen = len;
|
|
nfssvc(NFSSVC_ADDSOCK, &addsockargs);
|
|
(void)close(msgsock);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
setbindhost(struct addrinfo **ai, const char *bindhost, struct addrinfo hints)
|
|
{
|
|
int ecode;
|
|
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
|
|
const char *hostptr;
|
|
|
|
if (bindhost == NULL || strcmp("*", bindhost) == 0)
|
|
hostptr = NULL;
|
|
else
|
|
hostptr = bindhost;
|
|
|
|
if (hostptr != NULL) {
|
|
switch (hints.ai_family) {
|
|
case AF_INET:
|
|
if (inet_pton(AF_INET, hostptr, host_addr) == 1) {
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
} else {
|
|
if (inet_pton(AF_INET6, hostptr,
|
|
host_addr) == 1)
|
|
return (1);
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
if (inet_pton(AF_INET6, hostptr, host_addr) == 1) {
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
} else {
|
|
if (inet_pton(AF_INET, hostptr,
|
|
host_addr) == 1)
|
|
return (1);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ecode = getaddrinfo(hostptr, "nfs", &hints, ai);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo %s: %s", bindhost,
|
|
gai_strerror(ecode));
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
nonfs(__unused int signo)
|
|
{
|
|
syslog(LOG_ERR, "missing system call: NFS not available");
|
|
}
|
|
|
|
void
|
|
reapchild(__unused int signo)
|
|
{
|
|
pid_t pid;
|
|
int i;
|
|
|
|
while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
|
|
for (i = 0; i < nfsdcnt; i++)
|
|
if (pid == children[i])
|
|
children[i] = -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
unregistration()
|
|
{
|
|
if ((!rpcb_unset(RPCPROG_NFS, 2, NULL)) ||
|
|
(!rpcb_unset(RPCPROG_NFS, 3, NULL)))
|
|
syslog(LOG_ERR, "rpcb_unset failed");
|
|
}
|
|
|
|
void
|
|
killchildren()
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nfsdcnt; i++) {
|
|
if (children[i] > 0)
|
|
kill(children[i], SIGKILL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cleanup master after SIGUSR1.
|
|
*/
|
|
void
|
|
cleanup(__unused int signo)
|
|
{
|
|
nfsd_exit(0);
|
|
}
|
|
|
|
/*
|
|
* Cleanup child after SIGUSR1.
|
|
*/
|
|
void
|
|
child_cleanup(__unused int signo)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
void
|
|
nfsd_exit(int status)
|
|
{
|
|
killchildren();
|
|
unregistration();
|
|
exit(status);
|
|
}
|
|
|
|
void
|
|
start_server(int master)
|
|
{
|
|
char principal[128];
|
|
char hostname[128];
|
|
struct nfsd_nfsd_args nfsdargs;
|
|
int status;
|
|
|
|
status = 0;
|
|
if (new_syscall) {
|
|
gethostname(hostname, sizeof(hostname));
|
|
snprintf(principal, sizeof(principal), "nfs@%s", hostname);
|
|
nfsdargs.principal = principal;
|
|
nfsdargs.minthreads = nfsdcnt;
|
|
nfsdargs.maxthreads = nfsdcnt;
|
|
if (nfssvc(NFSSVC_NFSD, &nfsdargs) < 0) {
|
|
syslog(LOG_ERR, "nfssvc: %m");
|
|
status = 1;
|
|
}
|
|
} else {
|
|
if (nfssvc(NFSSVC_OLDNFSD, NULL) < 0) {
|
|
syslog(LOG_ERR, "nfssvc: %m");
|
|
status = 1;
|
|
}
|
|
}
|
|
if (master)
|
|
nfsd_exit(status);
|
|
else
|
|
exit(status);
|
|
}
|