/* $NetBSD: nfs_syscalls.c,v 1.17 1995/12/19 23:07:46 cgd Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Macklem at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)nfs_syscalls.c 8.3 (Berkeley) 1/4/94 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef ISO #include #endif #include #include #include #include #include #include #include #include /* Global defs. */ extern u_int32_t nfs_prog, nfs_vers; extern int32_t (*nfsrv_procs[NFS_NPROCS])(); extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; extern int nfs_numasync; extern time_t nqnfsstarttime; extern int nqsrv_writeslack; extern int nfsrtton; struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; int nuidhash_max = NFS_MAXUIDHASH; static int nfs_numnfsd = 0; int nfsd_waiting = 0; static int notstarted = 1; static int modify_flag = 0; static struct nfsdrt nfsdrt; void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock(); static void nfsd_rt(); void nfsrv_slpderef(), nfsrv_init(); #define TRUE 1 #define FALSE 0 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; /* * NFS server system calls * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c */ /* * Get file handle system call */ sys_getfh(p, v, retval) struct proc *p; void *v; register_t *retval; { register struct sys_getfh_args /* { syscallarg(char *) fname; syscallarg(fhandle_t *) fhp; } */ *uap = v; register struct vnode *vp; fhandle_t fh; int error; struct nameidata nd; /* * Must be super user */ if (error = suser(p->p_ucred, &p->p_acflag)) return (error); NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, SCARG(uap, fname), p); if (error = namei(&nd)) return (error); vp = nd.ni_vp; bzero((caddr_t)&fh, sizeof(fh)); fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; error = VFS_VPTOFH(vp, &fh.fh_fid); vput(vp); if (error) return (error); error = copyout((caddr_t)&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); return (error); } /* * Nfs server psuedo system call for the nfsd's * Based on the flag value it either: * - adds a socket to the selection list * - remains in the kernel as an nfsd * - remains in the kernel as an nfsiod */ sys_nfssvc(p, v, retval) struct proc *p; void *v; register_t *retval; { register struct sys_nfssvc_args /* { syscallarg(int) flag; syscallarg(caddr_t) argp; } */ *uap = v; struct nameidata nd; struct file *fp; struct mbuf *nam; struct nfsd_args nfsdarg; struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; struct nfsd_cargs ncd; struct nfsd *nfsd; struct nfssvc_sock *slp; struct nfsuid *nuidp, **nuh; struct nfsmount *nmp; int error; /* * Must be super user */ if (error = suser(p->p_ucred, &p->p_acflag)) return (error); while (nfssvc_sockhead_flag & SLP_INIT) { nfssvc_sockhead_flag |= SLP_WANTINIT; (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); } if (SCARG(uap, flag) & NFSSVC_BIOD) { #ifndef NFSCLIENT error = ENOSYS; #else /* !NFSCLIENT */ error = nfssvc_iod(p); #endif /* !NFSCLIENT */ } else if (SCARG(uap, flag) & NFSSVC_MNTD) { #ifndef NFSCLIENT error = ENOSYS; #else /* !NFSCLIENT */ if (error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd))) return (error); NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, ncd.ncd_dirp, p); if (error = namei(&nd)) return (error); if ((nd.ni_vp->v_flag & VROOT) == 0) error = EINVAL; nmp = VFSTONFS(nd.ni_vp->v_mount); vput(nd.ni_vp); if (error) return (error); if ((nmp->nm_flag & NFSMNT_MNTD) && (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) return (0); nmp->nm_flag |= NFSMNT_MNTD; error = nqnfs_clientd(nmp, p->p_ucred, &ncd, SCARG(uap, flag), SCARG(uap, argp), p); #endif /* !NFSCLIENT */ } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { #ifndef NFSSERVER error = ENOSYS; #else /* !NFSSERVER */ if (error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, sizeof(nfsdarg))) return (error); if (error = getsock(p->p_fd, nfsdarg.sock, &fp)) return (error); /* * Get the client address for connected sockets. */ if (nfsdarg.name == NULL || nfsdarg.namelen == 0) nam = (struct mbuf *)0; else if (error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, MT_SONAME)) return (error); error = nfssvc_addsock(fp, nam); #endif /* !NFSSERVER */ } else { #ifndef NFSSERVER error = ENOSYS; #else /* !NFSSERVER */ if (error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd))) return (error); if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && (nfsd = nsd->nsd_nfsd) && (nfsd->nd_slp->ns_flag & SLP_VALID)) { slp = nfsd->nd_slp; /* * First check to see if another nfsd has already * added this credential. */ for (nuidp = NUIDHASH(slp, nsd->nsd_uid)->lh_first; nuidp != 0; nuidp = nuidp->nu_hash.le_next) { if (nuidp->nu_uid == nsd->nsd_uid) break; } if (nuidp == 0) { /* * Nope, so we will. */ if (slp->ns_numuids < nuidhash_max) { slp->ns_numuids++; nuidp = (struct nfsuid *) malloc(sizeof (struct nfsuid), M_NFSUID, M_WAITOK); } else nuidp = (struct nfsuid *)0; if ((slp->ns_flag & SLP_VALID) == 0) { if (nuidp) free((caddr_t)nuidp, M_NFSUID); } else { if (nuidp == (struct nfsuid *)0) { nuidp = slp->ns_uidlruhead.tqh_first; LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); } nuidp->nu_cr = nsd->nsd_cr; if (nuidp->nu_cr.cr_ngroups > NGROUPS) nuidp->nu_cr.cr_ngroups = NGROUPS; nuidp->nu_cr.cr_ref = 1; nuidp->nu_uid = nsd->nsd_uid; TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, nu_lru); LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), nuidp, nu_hash); } } } if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) nfsd->nd_flag |= NFSD_AUTHFAIL; error = nfssvc_nfsd(nsd, SCARG(uap, argp), p); #endif /* !NFSSERVER */ } if (error == EINTR || error == ERESTART) error = 0; return (error); } #ifdef NFSSERVER /* * Adds a socket to the list for servicing by nfsds. */ nfssvc_addsock(fp, mynam) struct file *fp; struct mbuf *mynam; { register struct mbuf *m; register int siz; register struct nfssvc_sock *slp; register struct socket *so; struct nfssvc_sock *tslp; int error, s; so = (struct socket *)fp->f_data; tslp = (struct nfssvc_sock *)0; /* * Add it to the list, as required. */ if (so->so_proto->pr_protocol == IPPROTO_UDP) { tslp = nfs_udpsock; if (tslp->ns_flag & SLP_VALID) { m_freem(mynam); return (EPERM); } #ifdef ISO } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { tslp = nfs_cltpsock; if (tslp->ns_flag & SLP_VALID) { m_freem(mynam); return (EPERM); } #endif /* ISO */ } if (so->so_type == SOCK_STREAM) siz = NFS_MAXPACKET + sizeof (u_int32_t); else siz = NFS_MAXPACKET; if (error = soreserve(so, siz, siz)) { m_freem(mynam); return (error); } /* * Set protocol specific options { for now TCP only } and * reserve some space. For datagram sockets, this can get called * repeatedly for the same socket, but that isn't harmful. */ if (so->so_type == SOCK_STREAM) { MGET(m, M_WAIT, MT_SOOPTS); *mtod(m, int *) = 1; m->m_len = sizeof(int); sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); } if (so->so_proto->pr_domain->dom_family == AF_INET && so->so_proto->pr_protocol == IPPROTO_TCP) { MGET(m, M_WAIT, MT_SOOPTS); *mtod(m, int *) = 1; m->m_len = sizeof(int); sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); } so->so_rcv.sb_flags &= ~SB_NOINTR; so->so_rcv.sb_timeo = 0; so->so_snd.sb_flags &= ~SB_NOINTR; so->so_snd.sb_timeo = 0; if (tslp) slp = tslp; else { slp = (struct nfssvc_sock *) malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); slp->ns_uidhashtbl = hashinit(NUIDHASHSIZ, M_NFSSVC, &slp->ns_uidhash); TAILQ_INIT(&slp->ns_uidlruhead); TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); } slp->ns_so = so; slp->ns_nam = mynam; fp->f_count++; slp->ns_fp = fp; s = splsoftnet(); so->so_upcallarg = (caddr_t)slp; so->so_upcall = nfsrv_rcv; slp->ns_flag = (SLP_VALID | SLP_NEEDQ); nfsrv_wakenfsd(slp); splx(s); return (0); } /* * Called by nfssvc() for nfsds. Just loops around servicing rpc requests * until it is killed by a signal. */ nfssvc_nfsd(nsd, argp, p) struct nfsd_srvargs *nsd; caddr_t argp; struct proc *p; { register struct mbuf *m, *nam2; register int siz; register struct nfssvc_sock *slp; register struct socket *so; register int *solockp; struct nfsd *nd = nsd->nsd_nfsd; struct mbuf *mreq, *nam; struct timeval starttime; struct nfsuid *uidp; int error, cacherep, s; int sotype; s = splsoftnet(); if (nd == (struct nfsd *)0) { nsd->nsd_nfsd = nd = (struct nfsd *) malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); bzero((caddr_t)nd, sizeof (struct nfsd)); nd->nd_procp = p; nd->nd_cr.cr_ref = 1; TAILQ_INSERT_TAIL(&nfsd_head, nd, nd_chain); nd->nd_nqlflag = NQL_NOVAL; nfs_numnfsd++; } /* * Loop getting rpc requests until SIGKILL. */ for (;;) { if ((nd->nd_flag & NFSD_REQINPROG) == 0) { while (nd->nd_slp == (struct nfssvc_sock *)0 && (nfsd_head_flag & NFSD_CHECKSLP) == 0) { nd->nd_flag |= NFSD_WAITING; nfsd_waiting++; error = tsleep((caddr_t)nd, PSOCK | PCATCH, "nfsd", 0); nfsd_waiting--; if (error) goto done; } if (nd->nd_slp == (struct nfssvc_sock *)0 && (nfsd_head_flag & NFSD_CHECKSLP) != 0) { for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = slp->ns_chain.tqe_next) { if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) == (SLP_VALID | SLP_DOREC)) { slp->ns_flag &= ~SLP_DOREC; slp->ns_sref++; nd->nd_slp = slp; break; } } if (slp == 0) nfsd_head_flag &= ~NFSD_CHECKSLP; } if ((slp = nd->nd_slp) == (struct nfssvc_sock *)0) continue; if (slp->ns_flag & SLP_VALID) { if (slp->ns_flag & SLP_DISCONN) nfsrv_zapsock(slp); else if (slp->ns_flag & SLP_NEEDQ) { slp->ns_flag &= ~SLP_NEEDQ; (void) nfs_sndlock(&slp->ns_solock, (struct nfsreq *)0); nfsrv_rcv(slp->ns_so, (caddr_t)slp, M_WAIT); 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. */ if (nam2 = nd->nd_nam) { 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. */ for (uidp = NUIDHASH(slp, nd->nd_cr.cr_uid)->lh_first; uidp != 0; uidp = uidp->nu_hash.le_next) { if (uidp->nu_uid == nd->nd_cr.cr_uid) break; } if (uidp == 0) { 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_int32_t *) = 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 = splsoftnet(); 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 = splsoftnet(); if (nfsrv_dorec(slp, nd)) { nd->nd_flag &= ~NFSD_REQINPROG; nd->nd_slp = (struct nfssvc_sock *)0; nfsrv_slpderef(slp); } } done: TAILQ_REMOVE(&nfsd_head, nd, nd_chain); 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); } /* * 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. */ nfsrv_zapsock(slp) register struct nfssvc_sock *slp; { register struct nfsuid *nuidp, *nnuidp; register int i; struct socket *so; struct file *fp; struct mbuf *m; slp->ns_flag &= ~SLP_ALLFLAGS; if (fp = slp->ns_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); for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; nuidp = nnuidp) { nnuidp = nuidp->nu_lru.tqe_next; LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); free((caddr_t)nuidp, M_NFSUID); } } } /* * 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) { TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 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, *nslp; if (nfssvc_sockhead_flag & SLP_INIT) panic("nfsd init"); nfssvc_sockhead_flag |= SLP_INIT; if (terminating) { for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { nslp = slp->ns_chain.tqe_next; 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 */ } TAILQ_INIT(&nfssvc_sockhead); nfssvc_sockhead_flag &= ~SLP_INIT; if (nfssvc_sockhead_flag & SLP_WANTINIT) { nfssvc_sockhead_flag &= ~SLP_WANTINIT; wakeup((caddr_t)&nfssvc_sockhead); } TAILQ_INIT(&nfsd_head); nfsd_head_flag &= ~NFSD_CHECKSLP; nfs_udpsock = (struct nfssvc_sock *) malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); nfs_udpsock->ns_uidhashtbl = hashinit(NUIDHASHSIZ, M_NFSSVC, &nfs_udpsock->ns_uidhash); TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); nfs_cltpsock = (struct nfssvc_sock *) malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); nfs_cltpsock->ns_uidhashtbl = hashinit(NUIDHASHSIZ, M_NFSSVC, &nfs_cltpsock->ns_uidhash); TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); } /* * 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; } #endif /* NFSSERVER */ #ifdef NFSCLIENT /* * 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. */ 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); } } } /* * 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. */ 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); if (error = nfs_sigintr(nmp, rep, rep->r_procp)) { 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); } #endif /* NFSCLIENT */