900 lines
23 KiB
C
900 lines
23 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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 8.3 (Berkeley) 1/4/94
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* $Id: nfs_syscalls.c,v 1.3 1994/08/02 07:52:15 davidg Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/malloc.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/syslog.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#ifdef ISO
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#include <netiso/iso.h>
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#endif
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#include <nfs/rpcv2.h>
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#include <nfs/nfsv2.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsrvcache.h>
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#include <nfs/nfsmount.h>
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#include <nfs/nfsnode.h>
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#include <nfs/nqnfs.h>
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#include <nfs/nfsrtt.h>
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void nfsrv_zapsock __P((struct nfssvc_sock *));
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/* Global defs. */
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extern u_long nfs_prog, nfs_vers;
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extern int (*nfsrv_procs[NFS_NPROCS])();
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extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
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extern int nfs_numasync;
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extern time_t nqnfsstarttime;
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extern struct nfsrv_req nsrvq_head;
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extern struct nfsd nfsd_head;
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extern int nqsrv_writeslack;
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extern int nfsrtton;
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struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock;
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int nuidhash_max = NFS_MAXUIDHASH;
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static int nfs_numnfsd = 0;
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int nfsd_waiting = 0;
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static int notstarted = 1;
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static int modify_flag = 0;
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static struct nfsdrt nfsdrt;
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void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock();
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static void nfsd_rt();
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void nfsrv_slpderef(), nfsrv_init();
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#define TRUE 1
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#define FALSE 0
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static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
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/*
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* NFS server system calls
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* getfh() lives here too, but maybe should move to kern/vfs_syscalls.c
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*/
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/*
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* Get file handle system call
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*/
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struct getfh_args {
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char *fname;
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fhandle_t *fhp;
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};
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int
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getfh(p, uap, retval)
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struct proc *p;
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register struct getfh_args *uap;
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int *retval;
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{
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register struct vnode *vp;
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fhandle_t fh;
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int error;
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struct nameidata nd;
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/*
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* Must be super user
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*/
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error = suser(p->p_ucred, &p->p_acflag);
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if(error)
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return (error);
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p);
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error = namei(&nd);
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if (error)
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return (error);
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vp = nd.ni_vp;
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bzero((caddr_t)&fh, sizeof(fh));
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fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
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error = VFS_VPTOFH(vp, &fh.fh_fid);
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vput(vp);
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if (error)
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return (error);
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error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh));
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return (error);
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}
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static struct nfssvc_sock nfssvc_sockhead;
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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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*/
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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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int
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nfssvc(p, uap, retval)
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struct proc *p;
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register struct nfssvc_args *uap;
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int *retval;
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{
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struct nameidata nd;
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struct file *fp;
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struct mbuf *nam;
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struct nfsd_args nfsdarg;
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struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
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struct nfsd_cargs ncd;
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struct nfsd *nfsd;
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struct nfssvc_sock *slp;
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struct nfsuid *nuidp, **nuh;
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struct nfsmount *nmp;
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int error;
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/*
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* Must be super user
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*/
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error = suser(p->p_ucred, &p->p_acflag);
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if(error)
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return (error);
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while (nfssvc_sockhead.ns_flag & SLP_INIT) {
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nfssvc_sockhead.ns_flag |= SLP_WANTINIT;
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(void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
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}
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if (uap->flag & NFSSVC_BIOD)
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error = nfssvc_iod(p);
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else if (uap->flag & NFSSVC_MNTD) {
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error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
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if (error)
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return (error);
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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ncd.ncd_dirp, p);
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error = namei(&nd);
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if (error)
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return (error);
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if ((nd.ni_vp->v_flag & VROOT) == 0)
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error = EINVAL;
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nmp = VFSTONFS(nd.ni_vp->v_mount);
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vput(nd.ni_vp);
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if (error)
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return (error);
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if ((nmp->nm_flag & NFSMNT_MNTD) &&
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(uap->flag & NFSSVC_GOTAUTH) == 0)
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return (0);
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nmp->nm_flag |= NFSMNT_MNTD;
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error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
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uap->argp, p);
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} else 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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error = getsock(p->p_fd, nfsdarg.sock, &fp);
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if (error)
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return (error);
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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 = (struct mbuf *)0;
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else {
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error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
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MT_SONAME);
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if (error)
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return (error);
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}
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error = nfssvc_addsock(fp, nam);
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} else {
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error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
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if (error)
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return (error);
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if ((uap->flag & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) &&
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(nfsd->nd_slp->ns_flag & SLP_VALID)) {
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slp = nfsd->nd_slp;
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/*
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* First check to see if another nfsd has already
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* added this credential.
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*/
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nuidp = slp->ns_uidh[NUIDHASH(nsd->nsd_uid)];
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while (nuidp) {
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if (nuidp->nu_uid == nsd->nsd_uid)
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break;
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nuidp = nuidp->nu_hnext;
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}
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if (!nuidp) {
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/*
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* Nope, so we will.
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*/
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if (slp->ns_numuids < nuidhash_max) {
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slp->ns_numuids++;
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nuidp = (struct nfsuid *)
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malloc(sizeof (struct nfsuid), M_NFSUID,
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M_WAITOK);
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} else
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nuidp = (struct nfsuid *)0;
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if ((slp->ns_flag & SLP_VALID) == 0) {
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if (nuidp)
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free((caddr_t)nuidp, M_NFSUID);
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} else {
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if (nuidp == (struct nfsuid *)0) {
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nuidp = slp->ns_lruprev;
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remque(nuidp);
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if (nuidp->nu_hprev)
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nuidp->nu_hprev->nu_hnext =
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nuidp->nu_hnext;
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if (nuidp->nu_hnext)
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nuidp->nu_hnext->nu_hprev =
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nuidp->nu_hprev;
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}
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nuidp->nu_cr = nsd->nsd_cr;
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if (nuidp->nu_cr.cr_ngroups > NGROUPS)
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nuidp->nu_cr.cr_ngroups = NGROUPS;
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nuidp->nu_cr.cr_ref = 1;
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nuidp->nu_uid = nsd->nsd_uid;
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insque(nuidp, (struct nfsuid *)slp);
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nuh = &slp->ns_uidh[NUIDHASH(nsd->nsd_uid)];
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nuidp->nu_hnext = *nuh;
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if (nuidp->nu_hnext)
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nuidp->nu_hnext->nu_hprev = nuidp;
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nuidp->nu_hprev = (struct nfsuid *)0;
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*nuh = nuidp;
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}
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}
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}
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if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
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nfsd->nd_flag |= NFSD_AUTHFAIL;
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error = nfssvc_nfsd(nsd, uap->argp, p);
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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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int
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nfssvc_addsock(fp, mynam)
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struct file *fp;
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struct mbuf *mynam;
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{
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register struct mbuf *m;
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register int siz;
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register struct nfssvc_sock *slp;
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register struct socket *so;
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struct nfssvc_sock *tslp;
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int error, s;
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so = (struct socket *)fp->f_data;
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tslp = (struct nfssvc_sock *)0;
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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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m_freem(mynam);
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return (EPERM);
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}
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#ifdef ISO
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} else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) {
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tslp = nfs_cltpsock;
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if (tslp->ns_flag & SLP_VALID) {
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m_freem(mynam);
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return (EPERM);
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}
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#endif /* ISO */
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}
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if (so->so_type == SOCK_STREAM)
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siz = NFS_MAXPACKET + sizeof (u_long);
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else
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siz = NFS_MAXPACKET;
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error = soreserve(so, siz, siz);
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if (error) {
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m_freem(mynam);
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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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MGET(m, M_WAIT, MT_SOOPTS);
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*mtod(m, int *) = 1;
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m->m_len = sizeof(int);
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sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m);
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}
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if (so->so_proto->pr_domain->dom_family == AF_INET &&
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so->so_proto->pr_protocol == IPPROTO_TCP) {
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MGET(m, M_WAIT, MT_SOOPTS);
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*mtod(m, int *) = 1;
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m->m_len = sizeof(int);
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sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m);
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}
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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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so->so_snd.sb_flags &= ~SB_NOINTR;
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so->so_snd.sb_timeo = 0;
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if (tslp)
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slp = tslp;
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else {
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slp = (struct nfssvc_sock *)
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malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
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bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
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slp->ns_prev = nfssvc_sockhead.ns_prev;
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slp->ns_prev->ns_next = slp;
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slp->ns_next = &nfssvc_sockhead;
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nfssvc_sockhead.ns_prev = slp;
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slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp;
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}
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slp->ns_so = so;
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slp->ns_nam = mynam;
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fp->f_count++;
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slp->ns_fp = fp;
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s = splnet();
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so->so_upcallarg = (caddr_t)slp;
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so->so_upcall = nfsrv_rcv;
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slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
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nfsrv_wakenfsd(slp);
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splx(s);
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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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int
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nfssvc_nfsd(nsd, argp, p)
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struct nfsd_srvargs *nsd;
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caddr_t argp;
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struct proc *p;
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{
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register struct mbuf *m, *nam2;
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register int siz;
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register struct nfssvc_sock *slp;
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register struct socket *so;
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register int *solockp;
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struct nfsd *nd = nsd->nsd_nfsd;
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struct mbuf *mreq, *nam;
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struct timeval starttime;
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struct nfsuid *uidp;
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int error = 0, cacherep, s;
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int sotype;
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s = splnet();
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if (nd == (struct nfsd *)0) {
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nsd->nsd_nfsd = nd = (struct nfsd *)
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malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
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bzero((caddr_t)nd, sizeof (struct nfsd));
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nd->nd_procp = p;
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nd->nd_cr.cr_ref = 1;
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insque(nd, &nfsd_head);
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nd->nd_nqlflag = NQL_NOVAL;
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nfs_numnfsd++;
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}
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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 ((nd->nd_flag & NFSD_REQINPROG) == 0) {
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while (nd->nd_slp == (struct nfssvc_sock *)0 &&
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(nfsd_head.nd_flag & NFSD_CHECKSLP) == 0) {
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nd->nd_flag |= NFSD_WAITING;
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nfsd_waiting++;
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error = tsleep((caddr_t)nd, PSOCK | PCATCH, "nfsd", 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 (nd->nd_slp == (struct nfssvc_sock *)0 &&
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(nfsd_head.nd_flag & NFSD_CHECKSLP)) {
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slp = nfssvc_sockhead.ns_next;
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while (slp != &nfssvc_sockhead) {
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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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nd->nd_slp = slp;
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break;
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}
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slp = slp->ns_next;
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}
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if (slp == &nfssvc_sockhead)
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nfsd_head.nd_flag &= ~NFSD_CHECKSLP;
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}
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if ((slp = nd->nd_slp) == (struct nfssvc_sock *)0)
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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_sndlock(&slp->ns_solock,
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(struct nfsreq *)0);
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nfsrv_rcv(slp->ns_so, (caddr_t)slp,
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M_WAIT);
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|
nfs_sndunlock(&slp->ns_solock);
|
|
}
|
|
error = nfsrv_dorec(slp, nd);
|
|
nd->nd_flag |= NFSD_REQINPROG;
|
|
}
|
|
} else {
|
|
error = 0;
|
|
slp = nd->nd_slp;
|
|
}
|
|
if (error || (slp->ns_flag & SLP_VALID) == 0) {
|
|
nd->nd_slp = (struct nfssvc_sock *)0;
|
|
nd->nd_flag &= ~NFSD_REQINPROG;
|
|
nfsrv_slpderef(slp);
|
|
continue;
|
|
}
|
|
splx(s);
|
|
so = slp->ns_so;
|
|
sotype = so->so_type;
|
|
starttime = time;
|
|
if (so->so_proto->pr_flags & PR_CONNREQUIRED)
|
|
solockp = &slp->ns_solock;
|
|
else
|
|
solockp = (int *)0;
|
|
/*
|
|
* nam == nam2 for connectionless protocols such as UDP
|
|
* nam2 == NULL for connection based protocols to disable
|
|
* recent request caching.
|
|
*/
|
|
nam2 = nd->nd_nam;
|
|
if (nam2) {
|
|
nam = nam2;
|
|
cacherep = RC_CHECKIT;
|
|
} else {
|
|
nam = slp->ns_nam;
|
|
cacherep = RC_DOIT;
|
|
}
|
|
|
|
/*
|
|
* Check to see if authorization is needed.
|
|
*/
|
|
if (nd->nd_flag & NFSD_NEEDAUTH) {
|
|
static int logauth = 0;
|
|
|
|
nd->nd_flag &= ~NFSD_NEEDAUTH;
|
|
/*
|
|
* Check for a mapping already installed.
|
|
*/
|
|
uidp = slp->ns_uidh[NUIDHASH(nd->nd_cr.cr_uid)];
|
|
while (uidp) {
|
|
if (uidp->nu_uid == nd->nd_cr.cr_uid)
|
|
break;
|
|
uidp = uidp->nu_hnext;
|
|
}
|
|
if (!uidp) {
|
|
nsd->nsd_uid = nd->nd_cr.cr_uid;
|
|
if (nam2 && logauth++ == 0)
|
|
log(LOG_WARNING, "Kerberized NFS using UDP\n");
|
|
nsd->nsd_haddr =
|
|
mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
|
|
nsd->nsd_authlen = nd->nd_authlen;
|
|
if (copyout(nd->nd_authstr, nsd->nsd_authstr,
|
|
nd->nd_authlen) == 0 &&
|
|
copyout((caddr_t)nsd, argp, sizeof (*nsd)) == 0)
|
|
return (ENEEDAUTH);
|
|
cacherep = RC_DROPIT;
|
|
}
|
|
}
|
|
if (cacherep == RC_CHECKIT)
|
|
cacherep = nfsrv_getcache(nam2, nd, &mreq);
|
|
|
|
/*
|
|
* Check for just starting up for NQNFS and send
|
|
* fake "try again later" replies to the NQNFS clients.
|
|
*/
|
|
if (notstarted && nqnfsstarttime <= time.tv_sec) {
|
|
if (modify_flag) {
|
|
nqnfsstarttime = time.tv_sec + nqsrv_writeslack;
|
|
modify_flag = 0;
|
|
} else
|
|
notstarted = 0;
|
|
}
|
|
if (notstarted) {
|
|
if (nd->nd_nqlflag == NQL_NOVAL)
|
|
cacherep = RC_DROPIT;
|
|
else if (nd->nd_procnum != NFSPROC_WRITE) {
|
|
nd->nd_procnum = NFSPROC_NOOP;
|
|
nd->nd_repstat = NQNFS_TRYLATER;
|
|
cacherep = RC_DOIT;
|
|
} else
|
|
modify_flag = 1;
|
|
} else if (nd->nd_flag & NFSD_AUTHFAIL) {
|
|
nd->nd_flag &= ~NFSD_AUTHFAIL;
|
|
nd->nd_procnum = NFSPROC_NOOP;
|
|
nd->nd_repstat = NQNFS_AUTHERR;
|
|
cacherep = RC_DOIT;
|
|
}
|
|
|
|
switch (cacherep) {
|
|
case RC_DOIT:
|
|
error = (*(nfsrv_procs[nd->nd_procnum]))(nd,
|
|
nd->nd_mrep, nd->nd_md, nd->nd_dpos, &nd->nd_cr,
|
|
nam, &mreq);
|
|
if (nd->nd_cr.cr_ref != 1) {
|
|
printf("nfssvc cref=%d\n", nd->nd_cr.cr_ref);
|
|
panic("nfssvc cref");
|
|
}
|
|
if (error) {
|
|
if (nd->nd_procnum != NQNFSPROC_VACATED)
|
|
nfsstats.srv_errs++;
|
|
if (nam2) {
|
|
nfsrv_updatecache(nam2, nd, FALSE, mreq);
|
|
m_freem(nam2);
|
|
}
|
|
break;
|
|
}
|
|
nfsstats.srvrpccnt[nd->nd_procnum]++;
|
|
if (nam2)
|
|
nfsrv_updatecache(nam2, nd, TRUE, mreq);
|
|
nd->nd_mrep = (struct mbuf *)0;
|
|
case RC_REPLY:
|
|
m = mreq;
|
|
siz = 0;
|
|
while (m) {
|
|
siz += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
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 = (struct ifnet *)0;
|
|
/*
|
|
* For stream protocols, prepend a Sun RPC
|
|
* Record Mark.
|
|
*/
|
|
if (sotype == SOCK_STREAM) {
|
|
M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
|
|
*mtod(m, u_long *) = htonl(0x80000000 | siz);
|
|
}
|
|
if (solockp)
|
|
(void) nfs_sndlock(solockp, (struct nfsreq *)0);
|
|
if (slp->ns_flag & SLP_VALID)
|
|
error = nfs_send(so, nam2, m, (struct nfsreq *)0);
|
|
else {
|
|
error = EPIPE;
|
|
m_freem(m);
|
|
}
|
|
if (nfsrtton)
|
|
nfsd_rt(&starttime, sotype, nd, nam, cacherep);
|
|
if (nam2)
|
|
MFREE(nam2, m);
|
|
if (nd->nd_mrep)
|
|
m_freem(nd->nd_mrep);
|
|
if (error == EPIPE)
|
|
nfsrv_zapsock(slp);
|
|
if (solockp)
|
|
nfs_sndunlock(solockp);
|
|
if (error == EINTR || error == ERESTART) {
|
|
nfsrv_slpderef(slp);
|
|
s = splnet();
|
|
goto done;
|
|
}
|
|
break;
|
|
case RC_DROPIT:
|
|
if (nfsrtton)
|
|
nfsd_rt(&starttime, sotype, nd, nam, cacherep);
|
|
m_freem(nd->nd_mrep);
|
|
m_freem(nam2);
|
|
break;
|
|
};
|
|
s = splnet();
|
|
if (nfsrv_dorec(slp, nd)) {
|
|
nd->nd_flag &= ~NFSD_REQINPROG;
|
|
nd->nd_slp = (struct nfssvc_sock *)0;
|
|
nfsrv_slpderef(slp);
|
|
}
|
|
}
|
|
done:
|
|
remque(nd);
|
|
splx(s);
|
|
free((caddr_t)nd, M_NFSD);
|
|
nsd->nsd_nfsd = (struct nfsd *)0;
|
|
if (--nfs_numnfsd == 0)
|
|
nfsrv_init(TRUE); /* Reinitialize everything */
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Asynchronous I/O daemons for client nfs.
|
|
* They do read-ahead and write-behind operations on the block I/O cache.
|
|
* Never returns unless it fails or gets killed.
|
|
*/
|
|
int
|
|
nfssvc_iod(p)
|
|
struct proc *p;
|
|
{
|
|
register struct buf *bp;
|
|
register int i, myiod;
|
|
int error = 0;
|
|
|
|
/*
|
|
* Assign my position or return error if too many already running
|
|
*/
|
|
myiod = -1;
|
|
for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
|
|
if (nfs_asyncdaemon[i] == 0) {
|
|
nfs_asyncdaemon[i]++;
|
|
myiod = i;
|
|
break;
|
|
}
|
|
if (myiod == -1)
|
|
return (EBUSY);
|
|
nfs_numasync++;
|
|
/*
|
|
* Just loop around doin our stuff until SIGKILL
|
|
*/
|
|
for (;;) {
|
|
while (nfs_bufq.tqh_first == NULL && error == 0) {
|
|
nfs_iodwant[myiod] = p;
|
|
error = tsleep((caddr_t)&nfs_iodwant[myiod],
|
|
PWAIT | PCATCH, "nfsidl", 0);
|
|
}
|
|
while ((bp = nfs_bufq.tqh_first) != NULL) {
|
|
/* Take one off the front of the list */
|
|
TAILQ_REMOVE(&nfs_bufq, bp, b_freelist);
|
|
if (bp->b_flags & B_READ)
|
|
(void) nfs_doio(bp, bp->b_rcred, (struct proc *)0);
|
|
else
|
|
(void) nfs_doio(bp, bp->b_wcred, (struct proc *)0);
|
|
}
|
|
if (error) {
|
|
nfs_asyncdaemon[myiod] = 0;
|
|
nfs_numasync--;
|
|
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.
|
|
*/
|
|
void
|
|
nfsrv_zapsock(slp)
|
|
register struct nfssvc_sock *slp;
|
|
{
|
|
register struct nfsuid *nuidp, *onuidp;
|
|
register int i;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct mbuf *m;
|
|
|
|
slp->ns_flag &= ~SLP_ALLFLAGS;
|
|
fp = slp->ns_fp;
|
|
if (fp) {
|
|
slp->ns_fp = (struct file *)0;
|
|
so = slp->ns_so;
|
|
so->so_upcall = NULL;
|
|
soshutdown(so, 2);
|
|
closef(fp, (struct proc *)0);
|
|
if (slp->ns_nam)
|
|
MFREE(slp->ns_nam, m);
|
|
m_freem(slp->ns_raw);
|
|
m_freem(slp->ns_rec);
|
|
nuidp = slp->ns_lrunext;
|
|
while (nuidp != (struct nfsuid *)slp) {
|
|
onuidp = nuidp;
|
|
nuidp = nuidp->nu_lrunext;
|
|
free((caddr_t)onuidp, M_NFSUID);
|
|
}
|
|
slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp;
|
|
for (i = 0; i < NUIDHASHSIZ; i++)
|
|
slp->ns_uidh[i] = (struct nfsuid *)0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get an authorization string for the uid by having the mount_nfs sitting
|
|
* on this mount point porpous out of the kernel and do it.
|
|
*/
|
|
int
|
|
nfs_getauth(nmp, rep, cred, auth_type, auth_str, auth_len)
|
|
register struct nfsmount *nmp;
|
|
struct nfsreq *rep;
|
|
struct ucred *cred;
|
|
int *auth_type;
|
|
char **auth_str;
|
|
int *auth_len;
|
|
{
|
|
int error = 0;
|
|
|
|
while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) {
|
|
nmp->nm_flag |= NFSMNT_WANTAUTH;
|
|
(void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
|
|
"nfsauth1", 2 * hz);
|
|
error = nfs_sigintr(nmp, rep, rep->r_procp);
|
|
if (error) {
|
|
nmp->nm_flag &= ~NFSMNT_WANTAUTH;
|
|
return (error);
|
|
}
|
|
}
|
|
nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH);
|
|
nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
|
|
nmp->nm_authuid = cred->cr_uid;
|
|
wakeup((caddr_t)&nmp->nm_authstr);
|
|
|
|
/*
|
|
* And wait for mount_nfs to do its stuff.
|
|
*/
|
|
while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) {
|
|
(void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
|
|
"nfsauth2", 2 * hz);
|
|
error = nfs_sigintr(nmp, rep, rep->r_procp);
|
|
}
|
|
if (nmp->nm_flag & NFSMNT_AUTHERR) {
|
|
nmp->nm_flag &= ~NFSMNT_AUTHERR;
|
|
error = EAUTH;
|
|
}
|
|
if (error)
|
|
free((caddr_t)*auth_str, M_TEMP);
|
|
else {
|
|
*auth_type = nmp->nm_authtype;
|
|
*auth_len = nmp->nm_authlen;
|
|
}
|
|
nmp->nm_flag &= ~NFSMNT_HASAUTH;
|
|
nmp->nm_flag |= NFSMNT_WAITAUTH;
|
|
if (nmp->nm_flag & NFSMNT_WANTAUTH) {
|
|
nmp->nm_flag &= ~NFSMNT_WANTAUTH;
|
|
wakeup((caddr_t)&nmp->nm_authtype);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Derefence a server socket structure. If it has no more references and
|
|
* is no longer valid, you can throw it away.
|
|
*/
|
|
void
|
|
nfsrv_slpderef(slp)
|
|
register struct nfssvc_sock *slp;
|
|
{
|
|
if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
|
|
slp->ns_prev->ns_next = slp->ns_next;
|
|
slp->ns_next->ns_prev = slp->ns_prev;
|
|
free((caddr_t)slp, M_NFSSVC);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize the data structures for the server.
|
|
* Handshake with any new nfsds starting up to avoid any chance of
|
|
* corruption.
|
|
*/
|
|
void
|
|
nfsrv_init(terminating)
|
|
int terminating;
|
|
{
|
|
register struct nfssvc_sock *slp;
|
|
struct nfssvc_sock *oslp;
|
|
|
|
if (nfssvc_sockhead.ns_flag & SLP_INIT)
|
|
panic("nfsd init");
|
|
nfssvc_sockhead.ns_flag |= SLP_INIT;
|
|
if (terminating) {
|
|
slp = nfssvc_sockhead.ns_next;
|
|
while (slp != &nfssvc_sockhead) {
|
|
if (slp->ns_flag & SLP_VALID)
|
|
nfsrv_zapsock(slp);
|
|
slp->ns_next->ns_prev = slp->ns_prev;
|
|
slp->ns_prev->ns_next = slp->ns_next;
|
|
oslp = slp;
|
|
slp = slp->ns_next;
|
|
free((caddr_t)oslp, M_NFSSVC);
|
|
}
|
|
nfsrv_cleancache(); /* And clear out server cache */
|
|
}
|
|
nfs_udpsock = (struct nfssvc_sock *)
|
|
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
|
|
bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
|
|
nfs_cltpsock = (struct nfssvc_sock *)
|
|
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
|
|
bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
|
|
nfssvc_sockhead.ns_next = nfs_udpsock;
|
|
nfs_udpsock->ns_next = nfs_cltpsock;
|
|
nfs_cltpsock->ns_next = &nfssvc_sockhead;
|
|
nfssvc_sockhead.ns_prev = nfs_cltpsock;
|
|
nfs_cltpsock->ns_prev = nfs_udpsock;
|
|
nfs_udpsock->ns_prev = &nfssvc_sockhead;
|
|
nfs_udpsock->ns_lrunext = nfs_udpsock->ns_lruprev =
|
|
(struct nfsuid *)nfs_udpsock;
|
|
nfs_cltpsock->ns_lrunext = nfs_cltpsock->ns_lruprev =
|
|
(struct nfsuid *)nfs_cltpsock;
|
|
nfsd_head.nd_next = nfsd_head.nd_prev = &nfsd_head;
|
|
nfsd_head.nd_flag = 0;
|
|
nfssvc_sockhead.ns_flag &= ~SLP_INIT;
|
|
if (nfssvc_sockhead.ns_flag & SLP_WANTINIT) {
|
|
nfssvc_sockhead.ns_flag &= ~SLP_WANTINIT;
|
|
wakeup((caddr_t)&nfssvc_sockhead);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add entries to the server monitor log.
|
|
*/
|
|
static void
|
|
nfsd_rt(startp, sotype, nd, nam, cacherep)
|
|
struct timeval *startp;
|
|
int sotype;
|
|
register struct nfsd *nd;
|
|
struct mbuf *nam;
|
|
int cacherep;
|
|
{
|
|
register struct drt *rt;
|
|
|
|
rt = &nfsdrt.drt[nfsdrt.pos];
|
|
if (cacherep == RC_DOIT)
|
|
rt->flag = 0;
|
|
else if (cacherep == RC_REPLY)
|
|
rt->flag = DRT_CACHEREPLY;
|
|
else
|
|
rt->flag = DRT_CACHEDROP;
|
|
if (sotype == SOCK_STREAM)
|
|
rt->flag |= DRT_TCP;
|
|
if (nd->nd_nqlflag != NQL_NOVAL)
|
|
rt->flag |= DRT_NQNFS;
|
|
rt->proc = nd->nd_procnum;
|
|
if (mtod(nam, struct sockaddr *)->sa_family == AF_INET)
|
|
rt->ipadr = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
|
|
else
|
|
rt->ipadr = INADDR_ANY;
|
|
rt->resptime = ((time.tv_sec - startp->tv_sec) * 1000000) +
|
|
(time.tv_usec - startp->tv_usec);
|
|
rt->tstamp = time;
|
|
nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
|
|
}
|