736 lines
18 KiB
C
736 lines
18 KiB
C
/*-
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* Copyright (c) 1989, 1993
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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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* @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/namei.h>
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#include <sys/fcntl.h>
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#include <sys/lockf.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#ifdef INET6
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#include <net/if.h>
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#include <netinet6/in6_var.h>
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#endif
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#include <nfs/xdr_subs.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 <nfsserver/nfsm_subs.h>
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#include <nfsserver/nfsrvcache.h>
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#ifdef NFS_LEGACYRPC
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static MALLOC_DEFINE(M_NFSSVC, "nfss_srvsock", "Nfs server structure");
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MALLOC_DEFINE(M_NFSRVDESC, "nfss_srvdesc", "NFS server socket descriptor");
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MALLOC_DEFINE(M_NFSD, "nfss_daemon", "Nfs server daemon structure");
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#define TRUE 1
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#define FALSE 0
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SYSCTL_DECL(_vfs_nfsrv);
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int nfsd_waiting = 0;
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int nfsrv_numnfsd = 0;
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static int notstarted = 1;
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static int nfs_privport = 0;
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SYSCTL_INT(_vfs_nfsrv, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW,
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&nfs_privport, 0,
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"Only allow clients using a privileged port");
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SYSCTL_INT(_vfs_nfsrv, OID_AUTO, gatherdelay, CTLFLAG_RW,
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&nfsrvw_procrastinate, 0,
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"Delay value for write gathering");
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SYSCTL_INT(_vfs_nfsrv, OID_AUTO, gatherdelay_v3, CTLFLAG_RW,
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&nfsrvw_procrastinate_v3, 0,
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"Delay in seconds for NFSv3 write gathering");
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static int nfssvc_addsock(struct file *, struct sockaddr *);
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static void nfsrv_zapsock(struct nfssvc_sock *slp);
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static int nfssvc_nfsd(void);
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extern u_long sb_max_adj;
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/*
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* NFS server system calls
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*/
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/*
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* Nfs server psuedo system call for the nfsd's
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* Based on the flag value it either:
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* - adds a socket to the selection list
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* - remains in the kernel as an nfsd
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* - remains in the kernel as an nfsiod
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* For INET6 we suppose that nfsd provides only IN6P_IPV6_V6ONLY sockets
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* and that mountd provides
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* - sockaddr with no IPv4-mapped addresses
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* - mask for both INET and INET6 families if there is IPv4-mapped overlap
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct nfssvc_args {
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int flag;
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caddr_t argp;
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};
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#endif
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int
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nfssvc(struct thread *td, struct nfssvc_args *uap)
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{
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struct file *fp;
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struct sockaddr *nam;
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struct nfsd_addsock_args nfsdarg;
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int error;
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KASSERT(!mtx_owned(&Giant), ("nfssvc(): called with Giant"));
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AUDIT_ARG(cmd, uap->flag);
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error = priv_check(td, PRIV_NFS_DAEMON);
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if (error)
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return (error);
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NFSD_LOCK();
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while (nfssvc_sockhead_flag & SLP_INIT) {
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nfssvc_sockhead_flag |= SLP_WANTINIT;
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(void) msleep(&nfssvc_sockhead, &nfsd_mtx, PSOCK,
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"nfsd init", 0);
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}
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NFSD_UNLOCK();
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if (uap->flag & NFSSVC_ADDSOCK) {
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error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
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if (error)
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return (error);
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if ((error = fget(td, nfsdarg.sock, &fp)) != 0)
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return (error);
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if (fp->f_type != DTYPE_SOCKET) {
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fdrop(fp, td);
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return (error); /* XXXRW: Should be EINVAL? */
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}
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/*
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* Get the client address for connected sockets.
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*/
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if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
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nam = NULL;
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else {
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error = getsockaddr(&nam, nfsdarg.name,
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nfsdarg.namelen);
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if (error) {
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fdrop(fp, td);
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return (error);
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}
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}
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error = nfssvc_addsock(fp, nam);
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fdrop(fp, td);
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} else if (uap->flag & NFSSVC_OLDNFSD) {
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error = nfssvc_nfsd();
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} else {
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error = ENXIO;
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}
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if (error == EINTR || error == ERESTART)
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error = 0;
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return (error);
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}
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/*
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* Adds a socket to the list for servicing by nfsds.
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*/
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static int
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nfssvc_addsock(struct file *fp, struct sockaddr *mynam)
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{
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int siz;
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struct nfssvc_sock *slp;
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struct socket *so;
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int error;
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so = fp->f_data;
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#if 0
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/*
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* XXXRW: If this code is ever enabled, there's a race when running
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* MPSAFE.
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*/
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tslp = NULL;
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/*
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* Add it to the list, as required.
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*/
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if (so->so_proto->pr_protocol == IPPROTO_UDP) {
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tslp = nfs_udpsock;
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if (tslp->ns_flag & SLP_VALID) {
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if (mynam != NULL)
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free(mynam, M_SONAME);
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return (EPERM);
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}
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}
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#endif
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siz = sb_max_adj;
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error = soreserve(so, siz, siz);
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if (error) {
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if (mynam != NULL)
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free(mynam, M_SONAME);
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return (error);
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}
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/*
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* Set protocol specific options { for now TCP only } and
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* reserve some space. For datagram sockets, this can get called
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* repeatedly for the same socket, but that isn't harmful.
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*/
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if (so->so_type == SOCK_STREAM) {
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struct sockopt sopt;
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int val;
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bzero(&sopt, sizeof sopt);
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sopt.sopt_dir = SOPT_SET;
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sopt.sopt_level = SOL_SOCKET;
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sopt.sopt_name = SO_KEEPALIVE;
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sopt.sopt_val = &val;
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sopt.sopt_valsize = sizeof val;
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val = 1;
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sosetopt(so, &sopt);
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}
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if (so->so_proto->pr_protocol == IPPROTO_TCP) {
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struct sockopt sopt;
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int val;
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bzero(&sopt, sizeof sopt);
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sopt.sopt_dir = SOPT_SET;
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sopt.sopt_level = IPPROTO_TCP;
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sopt.sopt_name = TCP_NODELAY;
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sopt.sopt_val = &val;
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sopt.sopt_valsize = sizeof val;
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val = 1;
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sosetopt(so, &sopt);
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}
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SOCKBUF_LOCK(&so->so_rcv);
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so->so_rcv.sb_flags &= ~SB_NOINTR;
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so->so_rcv.sb_timeo = 0;
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SOCKBUF_UNLOCK(&so->so_rcv);
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SOCKBUF_LOCK(&so->so_snd);
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so->so_snd.sb_flags &= ~SB_NOINTR;
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so->so_snd.sb_timeo = 0;
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SOCKBUF_UNLOCK(&so->so_snd);
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slp = (struct nfssvc_sock *)
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malloc(sizeof (struct nfssvc_sock), M_NFSSVC,
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M_WAITOK | M_ZERO);
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STAILQ_INIT(&slp->ns_rec);
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NFSD_LOCK();
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TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
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slp->ns_so = so;
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slp->ns_nam = mynam;
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fhold(fp);
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slp->ns_fp = fp;
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SOCKBUF_LOCK(&so->so_rcv);
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so->so_upcallarg = (caddr_t)slp;
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so->so_upcall = nfsrv_rcv;
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so->so_rcv.sb_flags |= SB_UPCALL;
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SOCKBUF_UNLOCK(&so->so_rcv);
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slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
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nfsrv_wakenfsd(slp);
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NFSD_UNLOCK();
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return (0);
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}
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/*
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* Called by nfssvc() for nfsds. Just loops around servicing rpc requests
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* until it is killed by a signal.
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*/
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static int
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nfssvc_nfsd()
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{
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int siz;
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struct nfssvc_sock *slp;
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struct nfsd *nfsd;
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struct nfsrv_descript *nd = NULL;
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struct mbuf *m, *mreq;
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int error = 0, cacherep, s, sotype, writes_todo;
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int procrastinate;
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u_quad_t cur_usec;
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#ifndef nolint
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cacherep = RC_DOIT;
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writes_todo = 0;
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#endif
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nfsd = (struct nfsd *)
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malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK | M_ZERO);
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s = splnet();
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NFSD_LOCK();
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TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
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nfsrv_numnfsd++;
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/*
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* Loop getting rpc requests until SIGKILL.
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*/
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for (;;) {
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if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
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while (nfsd->nfsd_slp == NULL &&
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(nfsd_head_flag & NFSD_CHECKSLP) == 0) {
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nfsd->nfsd_flag |= NFSD_WAITING;
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nfsd_waiting++;
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error = msleep(nfsd, &nfsd_mtx,
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PSOCK | PCATCH, "-", 0);
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nfsd_waiting--;
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if (error)
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goto done;
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}
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if (nfsd->nfsd_slp == NULL &&
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(nfsd_head_flag & NFSD_CHECKSLP) != 0) {
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TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
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if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
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== (SLP_VALID | SLP_DOREC)) {
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slp->ns_flag &= ~SLP_DOREC;
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slp->ns_sref++;
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nfsd->nfsd_slp = slp;
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break;
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}
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}
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if (slp == NULL)
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nfsd_head_flag &= ~NFSD_CHECKSLP;
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}
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if ((slp = nfsd->nfsd_slp) == NULL)
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continue;
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if (slp->ns_flag & SLP_VALID) {
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if (slp->ns_flag & SLP_DISCONN)
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nfsrv_zapsock(slp);
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else if (slp->ns_flag & SLP_NEEDQ) {
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slp->ns_flag &= ~SLP_NEEDQ;
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(void) nfs_slplock(slp, 1);
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NFSD_UNLOCK();
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nfsrv_rcv(slp->ns_so, (caddr_t)slp,
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M_WAIT);
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NFSD_LOCK();
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nfs_slpunlock(slp);
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}
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error = nfsrv_dorec(slp, nfsd, &nd);
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cur_usec = nfs_curusec();
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if (error && LIST_FIRST(&slp->ns_tq) &&
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LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) {
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error = 0;
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cacherep = RC_DOIT;
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writes_todo = 1;
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} else
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writes_todo = 0;
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nfsd->nfsd_flag |= NFSD_REQINPROG;
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}
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} else {
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error = 0;
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slp = nfsd->nfsd_slp;
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}
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if (error || (slp->ns_flag & SLP_VALID) == 0) {
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if (nd) {
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if (nd->nd_cr != NULL)
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crfree(nd->nd_cr);
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free((caddr_t)nd, M_NFSRVDESC);
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nd = NULL;
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}
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nfsd->nfsd_slp = NULL;
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nfsd->nfsd_flag &= ~NFSD_REQINPROG;
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nfsrv_slpderef(slp);
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continue;
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}
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splx(s);
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sotype = slp->ns_so->so_type;
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if (nd) {
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getmicrotime(&nd->nd_starttime);
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if (nd->nd_nam2)
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nd->nd_nam = nd->nd_nam2;
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else
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nd->nd_nam = slp->ns_nam;
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/*
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* Check to see if authorization is needed.
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*/
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cacherep = nfsrv_getcache(nd, &mreq);
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|
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if (nfs_privport) {
|
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/* Check if source port is privileged */
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u_short port;
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struct sockaddr *nam = nd->nd_nam;
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in *)nam;
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/*
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* INET/INET6 - same code:
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* sin_port and sin6_port are at same offset
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*/
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port = ntohs(sin->sin_port);
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if (port >= IPPORT_RESERVED &&
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nd->nd_procnum != NFSPROC_NULL) {
|
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#ifdef INET6
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char b6[INET6_ADDRSTRLEN];
|
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#if defined(KLD_MODULE)
|
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/* Do not use ip6_sprintf: the nfs module should work without INET6. */
|
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#define ip6_sprintf(buf, a) \
|
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(sprintf((buf), "%x:%x:%x:%x:%x:%x:%x:%x", \
|
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(a)->s6_addr16[0], (a)->s6_addr16[1], \
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(a)->s6_addr16[2], (a)->s6_addr16[3], \
|
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(a)->s6_addr16[4], (a)->s6_addr16[5], \
|
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(a)->s6_addr16[6], (a)->s6_addr16[7]), \
|
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(buf))
|
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#endif
|
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#endif
|
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nd->nd_procnum = NFSPROC_NOOP;
|
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nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
|
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cacherep = RC_DOIT;
|
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printf("NFS request from unprivileged port (%s:%d)\n",
|
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#ifdef INET6
|
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sin->sin_family == AF_INET6 ?
|
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ip6_sprintf(b6, &satosin6(sin)->sin6_addr) :
|
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#if defined(KLD_MODULE)
|
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#undef ip6_sprintf
|
|
#endif
|
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#endif
|
|
inet_ntoa(sin->sin_addr), port);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
* Loop to get all the write rpc relies that have been
|
|
* gathered together.
|
|
*/
|
|
do {
|
|
switch (cacherep) {
|
|
case RC_DOIT:
|
|
if (nd && (nd->nd_flag & ND_NFSV3))
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procrastinate = nfsrvw_procrastinate_v3;
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else
|
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procrastinate = nfsrvw_procrastinate;
|
|
NFSD_UNLOCK();
|
|
if (writes_todo || (!(nd->nd_flag & ND_NFSV3) &&
|
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nd->nd_procnum == NFSPROC_WRITE &&
|
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procrastinate > 0 && !notstarted))
|
|
error = nfsrv_writegather(&nd, slp, &mreq);
|
|
else
|
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error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
|
|
slp, &mreq);
|
|
NFSD_LOCK();
|
|
if (mreq == NULL)
|
|
break;
|
|
if (error != 0 && error != NFSERR_RETVOID) {
|
|
nfsrvstats.srv_errs++;
|
|
nfsrv_updatecache(nd, FALSE, mreq);
|
|
if (nd->nd_nam2)
|
|
free(nd->nd_nam2, M_SONAME);
|
|
break;
|
|
}
|
|
nfsrvstats.srvrpccnt[nd->nd_procnum]++;
|
|
nfsrv_updatecache(nd, TRUE, mreq);
|
|
nd->nd_mrep = NULL;
|
|
/* FALLTHROUGH */
|
|
case RC_REPLY:
|
|
NFSD_UNLOCK();
|
|
siz = m_length(mreq, NULL);
|
|
if (siz <= 0 || siz > NFS_MAXPACKET) {
|
|
printf("mbuf siz=%d\n",siz);
|
|
panic("Bad nfs svc reply");
|
|
}
|
|
m = mreq;
|
|
m->m_pkthdr.len = siz;
|
|
m->m_pkthdr.rcvif = NULL;
|
|
/*
|
|
* For stream protocols, prepend a Sun RPC
|
|
* Record Mark.
|
|
*/
|
|
if (sotype == SOCK_STREAM) {
|
|
M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
|
|
*mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
|
|
}
|
|
NFSD_LOCK();
|
|
if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
|
|
(void) nfs_slplock(slp, 1);
|
|
if (slp->ns_flag & SLP_VALID) {
|
|
NFSD_UNLOCK();
|
|
error = nfsrv_send(slp->ns_so, nd->nd_nam2, m);
|
|
NFSD_LOCK();
|
|
} else {
|
|
error = EPIPE;
|
|
m_freem(m);
|
|
}
|
|
if (nd->nd_nam2)
|
|
free(nd->nd_nam2, M_SONAME);
|
|
if (nd->nd_mrep)
|
|
m_freem(nd->nd_mrep);
|
|
if (error == EPIPE)
|
|
nfsrv_zapsock(slp);
|
|
if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
|
|
nfs_slpunlock(slp);
|
|
if (error == EINTR || error == ERESTART) {
|
|
if (nd->nd_cr != NULL)
|
|
crfree(nd->nd_cr);
|
|
free((caddr_t)nd, M_NFSRVDESC);
|
|
nfsrv_slpderef(slp);
|
|
s = splnet();
|
|
goto done;
|
|
}
|
|
break;
|
|
case RC_DROPIT:
|
|
m_freem(nd->nd_mrep);
|
|
if (nd->nd_nam2)
|
|
free(nd->nd_nam2, M_SONAME);
|
|
break;
|
|
};
|
|
if (nd) {
|
|
if (nd->nd_cr != NULL)
|
|
crfree(nd->nd_cr);
|
|
free((caddr_t)nd, M_NFSRVDESC);
|
|
nd = NULL;
|
|
}
|
|
|
|
/*
|
|
* Check to see if there are outstanding writes that
|
|
* need to be serviced.
|
|
*/
|
|
cur_usec = nfs_curusec();
|
|
s = splsoftclock();
|
|
if (LIST_FIRST(&slp->ns_tq) &&
|
|
LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) {
|
|
cacherep = RC_DOIT;
|
|
writes_todo = 1;
|
|
} else
|
|
writes_todo = 0;
|
|
splx(s);
|
|
} while (writes_todo);
|
|
s = splnet();
|
|
if (nfsrv_dorec(slp, nfsd, &nd)) {
|
|
nfsd->nfsd_flag &= ~NFSD_REQINPROG;
|
|
nfsd->nfsd_slp = NULL;
|
|
nfsrv_slpderef(slp);
|
|
}
|
|
mtx_assert(&Giant, MA_NOTOWNED);
|
|
}
|
|
done:
|
|
mtx_assert(&Giant, MA_NOTOWNED);
|
|
TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
|
|
splx(s);
|
|
free((caddr_t)nfsd, M_NFSD);
|
|
if (--nfsrv_numnfsd == 0)
|
|
nfsrv_init(TRUE); /* Reinitialize everything */
|
|
NFSD_UNLOCK();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Shut down a socket associated with an nfssvc_sock structure.
|
|
* Should be called with the send lock set, if required.
|
|
* The trick here is to increment the sref at the start, so that the nfsds
|
|
* will stop using it and clear ns_flag at the end so that it will not be
|
|
* reassigned during cleanup.
|
|
*/
|
|
static void
|
|
nfsrv_zapsock(struct nfssvc_sock *slp)
|
|
{
|
|
struct nfsrv_descript *nwp, *nnwp;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct nfsrv_rec *rec;
|
|
int s;
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
/*
|
|
* XXXRW: By clearing all flags, other threads/etc should ignore
|
|
* this slp and we can safely release nfsd_mtx so we can clean
|
|
* up the slp safely.
|
|
*/
|
|
slp->ns_flag &= ~SLP_ALLFLAGS;
|
|
fp = slp->ns_fp;
|
|
if (fp) {
|
|
NFSD_UNLOCK();
|
|
slp->ns_fp = NULL;
|
|
so = slp->ns_so;
|
|
SOCKBUF_LOCK(&so->so_rcv);
|
|
so->so_rcv.sb_flags &= ~SB_UPCALL;
|
|
so->so_upcall = NULL;
|
|
so->so_upcallarg = NULL;
|
|
SOCKBUF_UNLOCK(&so->so_rcv);
|
|
soshutdown(so, SHUT_RDWR);
|
|
closef(fp, NULL);
|
|
NFSD_LOCK();
|
|
if (slp->ns_nam)
|
|
free(slp->ns_nam, M_SONAME);
|
|
m_freem(slp->ns_raw);
|
|
while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
|
|
STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
|
|
if (rec->nr_address)
|
|
free(rec->nr_address, M_SONAME);
|
|
m_freem(rec->nr_packet);
|
|
free(rec, M_NFSRVDESC);
|
|
}
|
|
s = splsoftclock();
|
|
for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) {
|
|
nnwp = LIST_NEXT(nwp, nd_tq);
|
|
LIST_REMOVE(nwp, nd_tq);
|
|
if (nwp->nd_cr != NULL)
|
|
crfree(nwp->nd_cr);
|
|
free((caddr_t)nwp, M_NFSRVDESC);
|
|
}
|
|
LIST_INIT(&slp->ns_tq);
|
|
splx(s);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Derefence a server socket structure. If it has no more references and
|
|
* is no longer valid, you can throw it away.
|
|
*/
|
|
void
|
|
nfsrv_slpderef(struct nfssvc_sock *slp)
|
|
{
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
|
|
TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
|
|
free((caddr_t)slp, M_NFSSVC);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lock a socket against others.
|
|
*
|
|
* XXXRW: Wait argument is always 1 in the caller. Replace with a real
|
|
* sleep lock?
|
|
*/
|
|
int
|
|
nfs_slplock(struct nfssvc_sock *slp, int wait)
|
|
{
|
|
int *statep = &slp->ns_solock;
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
if (!wait && (*statep & NFSRV_SNDLOCK))
|
|
return(0); /* already locked, fail */
|
|
while (*statep & NFSRV_SNDLOCK) {
|
|
*statep |= NFSRV_WANTSND;
|
|
(void) msleep(statep, &nfsd_mtx, PZERO - 1, "nfsslplck", 0);
|
|
}
|
|
*statep |= NFSRV_SNDLOCK;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Unlock the stream socket for others.
|
|
*/
|
|
void
|
|
nfs_slpunlock(struct nfssvc_sock *slp)
|
|
{
|
|
int *statep = &slp->ns_solock;
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
if ((*statep & NFSRV_SNDLOCK) == 0)
|
|
panic("nfs slpunlock");
|
|
*statep &= ~NFSRV_SNDLOCK;
|
|
if (*statep & NFSRV_WANTSND) {
|
|
*statep &= ~NFSRV_WANTSND;
|
|
wakeup(statep);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize the data structures for the server.
|
|
* Handshake with any new nfsds starting up to avoid any chance of
|
|
* corruption.
|
|
*/
|
|
void
|
|
nfsrv_init(int terminating)
|
|
{
|
|
struct nfssvc_sock *slp, *nslp;
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
if (nfssvc_sockhead_flag & SLP_INIT)
|
|
panic("nfsd init");
|
|
nfssvc_sockhead_flag |= SLP_INIT;
|
|
if (terminating) {
|
|
TAILQ_FOREACH_SAFE(slp, &nfssvc_sockhead, ns_chain, nslp) {
|
|
if (slp->ns_flag & SLP_VALID)
|
|
nfsrv_zapsock(slp);
|
|
TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
|
|
free((caddr_t)slp, M_NFSSVC);
|
|
}
|
|
nfsrv_cleancache(); /* And clear out server cache */
|
|
} else
|
|
nfs_pub.np_valid = 0;
|
|
|
|
TAILQ_INIT(&nfssvc_sockhead);
|
|
nfssvc_sockhead_flag &= ~SLP_INIT;
|
|
if (nfssvc_sockhead_flag & SLP_WANTINIT) {
|
|
nfssvc_sockhead_flag &= ~SLP_WANTINIT;
|
|
wakeup(&nfssvc_sockhead);
|
|
}
|
|
|
|
TAILQ_INIT(&nfsd_head);
|
|
nfsd_head_flag &= ~NFSD_CHECKSLP;
|
|
|
|
#if 0
|
|
nfs_udpsock = (struct nfssvc_sock *)
|
|
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
|
|
STAILQ_INIT(&nfs_udpsock->ns_rec);
|
|
TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
|
|
|
|
nfs_cltpsock = (struct nfssvc_sock *)
|
|
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
|
|
STAILQ_INIT(&nfs_cltpsock->ns_rec);
|
|
TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
|
|
#endif
|
|
}
|
|
|
|
#endif /* NFS_LEGACYRPC */
|