/* $OpenBSD: nfs_syscalls.c,v 1.45 2005/11/30 10:35:08 pedro Exp $ */ /* $NetBSD: nfs_syscalls.c,v 1.19 1996/02/18 11:53:52 fvdl 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. 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 8.5 (Berkeley) 3/30/95 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void nfsrv_zapsock(struct nfssvc_sock *); /* Global defs. */ extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *, struct nfssvc_sock *, struct proc *, struct mbuf **); extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; extern int nfs_numasync; extern int nfsrtton; extern struct nfsstats nfsstats; extern int nfsrvw_procrastinate; struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; int nuidhash_max = NFS_MAXUIDHASH; int nfsd_waiting = 0; #ifdef NFSSERVER static int nfs_numnfsd = 0; static struct nfsdrt nfsdrt; #endif struct nfssvc_sockhead nfssvc_sockhead; struct nfsdhead nfsd_head; int nfssvc_sockhead_flag; int nfsd_head_flag; #define TRUE 1 #define FALSE 0 #ifdef NFSCLIENT struct proc *nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; int nfs_niothreads = -1; #endif #ifdef NFSSERVER static void nfsd_rt(int, struct nfsrv_descript *, int); #endif int nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd, int flag, caddr_t argp, struct proc *p); /* * Nfs client helper daemon. * It also get authorization strings for "kerb" mounts. * It must start at the beginning of the list again after any potential * "sleep" since nfs_reclaim() called from vclean() can pull a node off * the list asynchronously. */ int nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd, int flag, caddr_t argp, struct proc *p) { struct nfsuid *nuidp, *nnuidp; int error = 0; /* * First initialize some variables */ /* * If an authorization string is being passed in, get it. */ if ((flag & NFSSVC_GOTAUTH) && (nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_DISMNT)) == 0) { if (nmp->nm_flag & NFSMNT_HASAUTH) panic("cld kerb"); if ((flag & NFSSVC_AUTHINFAIL) == 0) { if (ncd->ncd_authlen <= nmp->nm_authlen && ncd->ncd_verflen <= nmp->nm_verflen && !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&& !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){ nmp->nm_authtype = ncd->ncd_authtype; nmp->nm_authlen = ncd->ncd_authlen; nmp->nm_verflen = ncd->ncd_verflen; } else nmp->nm_flag |= NFSMNT_AUTHERR; } else nmp->nm_flag |= NFSMNT_AUTHERR; nmp->nm_flag |= NFSMNT_HASAUTH; wakeup((caddr_t)&nmp->nm_authlen); } else nmp->nm_flag |= NFSMNT_WAITAUTH; /* * Loop every second updating queue until there is a termination sig. */ while ((nmp->nm_flag & NFSMNT_DISMNT) == 0) { /* * Get an authorization string, if required. */ if ((nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_DISMNT | NFSMNT_HASAUTH)) == 0) { ncd->ncd_authuid = nmp->nm_authuid; if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs))) nmp->nm_flag |= NFSMNT_WAITAUTH; else return (ENEEDAUTH); } /* * Wait a bit (no pun) and do it again. */ if ((nmp->nm_flag & NFSMNT_DISMNT) == 0 && (nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_HASAUTH))) { error = tsleep((caddr_t)&nmp->nm_authstr, PSOCK | PCATCH, "nqnfstimr", hz / 3); if (error == EINTR || error == ERESTART) { if (vfs_busy(nmp->nm_mountp, LK_EXCLUSIVE, NULL) == 0) dounmount(nmp->nm_mountp, MNT_FORCE, p, NULL); } } } /* * Finally, we can free up the mount structure. */ for (nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); nuidp != NULL; nuidp = nnuidp) { nnuidp = TAILQ_NEXT(nuidp, nu_lru); LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); free((caddr_t)nuidp, M_NFSUID); } free((caddr_t)nmp, M_NFSMNT); if (error == EWOULDBLOCK) error = 0; return (error); } /* * NFS server system calls */ /* * Nfs server pseudo 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 */ int sys_nfssvc(p, v, retval) struct proc *p; void *v; register_t *retval; { struct sys_nfssvc_args /* { syscallarg(int) flag; syscallarg(caddr_t) argp; } */ *uap = v; #ifdef NFSCLIENT struct nameidata nd; struct nfsmount *nmp; struct nfsd_cargs ncd; #endif int error; #ifdef NFSSERVER struct file *fp; struct mbuf *nam; struct nfsd_args nfsdarg; struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; struct nfsd *nfsd; struct nfssvc_sock *slp; struct nfsuid *nuidp; #endif /* * Must be super user */ error = suser(p, 0); if(error) 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) { error = ENOSYS; } else if (SCARG(uap, flag) & NFSSVC_MNTD) { #ifndef NFSCLIENT error = ENOSYS; #else error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); if (error) return (error); NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, ncd.ncd_dirp, p); error = namei(&nd); if (error) 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 = nfs_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 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, sizeof(nfsdarg)); if (error) return (error); error = getsock(p->p_fd, nfsdarg.sock, &fp); if (error) return (error); /* * Get the client address for connected sockets. */ if (nfsdarg.name == NULL || nfsdarg.namelen == 0) nam = (struct mbuf *)0; else { error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, MT_SONAME); if (error) { FRELE(fp); return (error); } } error = nfssvc_addsock(fp, nam); FRELE(fp); #endif /* !NFSSERVER */ } else { #ifndef NFSSERVER error = ENOSYS; #else error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); if (error) return (error); if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) != NULL && (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { slp = nfsd->nfsd_slp; /* * First check to see if another nfsd has already * added this credential. */ LIST_FOREACH(nuidp, NUIDHASH(slp,nsd->nsd_cr.cr_uid), nu_hash) { if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && (!nfsd->nfsd_nd->nd_nam2 || netaddr_match(NU_NETFAM(nuidp), &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) break; } if (nuidp) { nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; } else { /* * 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 = TAILQ_FIRST(&slp->ns_uidlruhead); LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); if (nuidp->nu_flag & NU_NAM) m_freem(nuidp->nu_nam); } nuidp->nu_flag = 0; 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_timestamp = nsd->nsd_timestamp; nuidp->nu_expire = time_second + nsd->nsd_ttl; /* * and save the session key in nu_key. */ bcopy(nsd->nsd_key, nuidp->nu_key, sizeof (nsd->nsd_key)); if (nfsd->nfsd_nd->nd_nam2) { struct sockaddr_in *saddr; saddr = mtod(nfsd->nfsd_nd->nd_nam2, struct sockaddr_in *); switch (saddr->sin_family) { case AF_INET: nuidp->nu_flag |= NU_INETADDR; nuidp->nu_inetaddr = saddr->sin_addr.s_addr; break; default: nuidp->nu_flag |= NU_NAM; nuidp->nu_nam = m_copym( nfsd->nfsd_nd->nd_nam2, 0, M_COPYALL, M_WAIT); break; }; } TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, nu_lru); LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), nuidp, nu_hash); nfsrv_setcred(&nuidp->nu_cr, &nfsd->nfsd_nd->nd_cr); nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; } } } if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) nfsd->nfsd_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. */ int nfssvc_addsock(fp, mynam) struct file *fp; struct mbuf *mynam; { struct mbuf *m; int siz; struct nfssvc_sock *slp; 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); } } if (so->so_type == SOCK_STREAM) siz = NFS_MAXPACKET + sizeof (u_long); else siz = NFS_MAXPACKET; error = soreserve(so, siz, siz); if (error) { 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, int32_t *) = 1; m->m_len = sizeof(int32_t); 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, int32_t *) = 1; m->m_len = sizeof(int32_t); 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)); 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. */ int nfssvc_nfsd(nsd, argp, p) struct nfsd_srvargs *nsd; caddr_t argp; struct proc *p; { struct mbuf *m; int siz; struct nfssvc_sock *slp; struct socket *so; int *solockp; struct nfsd *nfsd = nsd->nsd_nfsd; struct nfsrv_descript *nd = NULL; struct mbuf *mreq; int error = 0, cacherep, s, sotype, writes_todo; u_quad_t cur_usec; struct timeval tv; #ifndef nolint cacherep = RC_DOIT; writes_todo = 0; #endif s = splsoftnet(); if (nfsd == (struct nfsd *)0) { nsd->nsd_nfsd = nfsd = (struct nfsd *) malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); bzero((caddr_t)nfsd, sizeof (struct nfsd)); nfsd->nfsd_procp = p; TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); nfs_numnfsd++; } PHOLD(p); /* * Loop getting rpc requests until SIGKILL. */ for (;;) { if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && (nfsd_head_flag & NFSD_CHECKSLP) == 0) { nfsd->nfsd_flag |= NFSD_WAITING; nfsd_waiting++; error = tsleep((caddr_t)nfsd, PSOCK | PCATCH, "nfsd", 0); nfsd_waiting--; if (error) goto done; } if (nfsd->nfsd_slp == NULL && (nfsd_head_flag & NFSD_CHECKSLP) != 0) { for (slp = TAILQ_FIRST(&nfssvc_sockhead); slp != 0; slp = TAILQ_NEXT(slp, ns_chain)) { if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) == (SLP_VALID | SLP_DOREC)) { slp->ns_flag &= ~SLP_DOREC; slp->ns_sref++; nfsd->nfsd_slp = slp; break; } } if (slp == 0) nfsd_head_flag &= ~NFSD_CHECKSLP; } if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) continue; if (slp->ns_flag & SLP_VALID) { struct timeval tv; 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, nfsd, &nd); getmicrotime(&tv); cur_usec = (u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec; if (error && LIST_FIRST(&slp->ns_tq) && LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { error = 0; cacherep = RC_DOIT; writes_todo = 1; } else writes_todo = 0; nfsd->nfsd_flag |= NFSD_REQINPROG; } } else { error = 0; slp = nfsd->nfsd_slp; } if (error || (slp->ns_flag & SLP_VALID) == 0) { if (nd) { free((caddr_t)nd, M_NFSRVDESC); nd = NULL; } nfsd->nfsd_slp = (struct nfssvc_sock *)0; nfsd->nfsd_flag &= ~NFSD_REQINPROG; nfsrv_slpderef(slp); continue; } splx(s); so = slp->ns_so; sotype = so->so_type; if (so->so_proto->pr_flags & PR_CONNREQUIRED) solockp = &slp->ns_solock; else solockp = (int *)0; if (nd) { getmicrotime(&nd->nd_starttime); if (nd->nd_nam2) nd->nd_nam = nd->nd_nam2; else nd->nd_nam = slp->ns_nam; /* * Check to see if authorization is needed. */ if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; nsd->nsd_haddr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; nsd->nsd_authlen = nfsd->nfsd_authlen; nsd->nsd_verflen = nfsd->nfsd_verflen; if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, nfsd->nfsd_authlen) && !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, nfsd->nfsd_verflen) && !copyout((caddr_t)nsd, argp, sizeof (*nsd))) { PRELE(p); return (ENEEDAUTH); } cacherep = RC_DROPIT; } else cacherep = nfsrv_getcache(nd, slp, &mreq); if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; nd->nd_procnum = NFSPROC_NOOP; nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); cacherep = RC_DOIT; } } /* * Loop to get all the write rpc relies that have been * gathered together. */ do { switch (cacherep) { case RC_DOIT: if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && nd->nd_procnum == NFSPROC_WRITE && nfsrvw_procrastinate > 0)) error = nfsrv_writegather(&nd, slp, nfsd->nfsd_procp, &mreq); else error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, slp, nfsd->nfsd_procp, &mreq); if (mreq == NULL) break; if (error) { nfsstats.srv_errs++; nfsrv_updatecache(nd, FALSE, mreq); if (nd->nd_nam2) m_freem(nd->nd_nam2); break; } nfsstats.srvrpccnt[nd->nd_procnum]++; nfsrv_updatecache(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, nd->nd_nam2, m, NULL); else { error = EPIPE; m_freem(m); } if (nfsrtton) nfsd_rt(sotype, nd, cacherep); if (nd->nd_nam2) MFREE(nd->nd_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) { free((caddr_t)nd, M_NFSRVDESC); nfsrv_slpderef(slp); s = splsoftnet(); goto done; } break; case RC_DROPIT: if (nfsrtton) nfsd_rt(sotype, nd, cacherep); m_freem(nd->nd_mrep); m_freem(nd->nd_nam2); break; }; if (nd) { FREE((caddr_t)nd, M_NFSRVDESC); nd = NULL; } /* * Check to see if there are outstanding writes that * need to be serviced. */ getmicrotime(&tv); cur_usec = (u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec; 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 = splsoftnet(); if (nfsrv_dorec(slp, nfsd, &nd)) { nfsd->nfsd_flag &= ~NFSD_REQINPROG; nfsd->nfsd_slp = NULL; nfsrv_slpderef(slp); } } done: PRELE(p); TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); splx(s); free((caddr_t)nfsd, 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. */ void nfsrv_zapsock(slp) struct nfssvc_sock *slp; { struct nfsuid *nuidp, *nnuidp; struct nfsrv_descript *nwp, *nnwp; struct socket *so; struct file *fp; struct mbuf *m; int s; slp->ns_flag &= ~SLP_ALLFLAGS; fp = slp->ns_fp; if (fp) { FREF(fp); slp->ns_fp = NULL; so = slp->ns_so; so->so_upcall = NULL; soshutdown(so, 2); closef(fp, NULL); if (slp->ns_nam) MFREE(slp->ns_nam, m); m_freem(slp->ns_raw); m_freem(slp->ns_rec); for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != NULL; nuidp = nnuidp) { nnuidp = TAILQ_NEXT(nuidp, nu_lru); LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); if (nuidp->nu_flag & NU_NAM) m_freem(nuidp->nu_nam); free((caddr_t)nuidp, M_NFSUID); } s = splsoftclock(); for (nwp = LIST_FIRST(&slp->ns_tq); nwp != NULL; nwp = nnwp) { nnwp = LIST_NEXT(nwp, nd_tq); LIST_REMOVE(nwp, nd_tq); 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(slp) 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; { struct nfssvc_sock *slp, *nslp; if (nfssvc_sockhead_flag & SLP_INIT) panic("nfsd init"); nfssvc_sockhead_flag |= SLP_INIT; if (terminating) { for (slp = TAILQ_FIRST(&nfssvc_sockhead); slp != NULL; slp = nslp) { nslp = TAILQ_NEXT(slp, ns_chain); 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)); 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)); 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(sotype, nd, cacherep) int sotype; struct nfsrv_descript *nd; int cacherep; { 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; else if (nd->nd_flag & ND_NFSV3) rt->flag |= DRT_NFSV3; rt->proc = nd->nd_procnum; if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; else rt->ipadr = INADDR_ANY; getmicrotime(&rt->tstamp); rt->resptime = ((rt->tstamp.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + (rt->tstamp.tv_usec - nd->nd_starttime.tv_usec); nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; } #endif /* NFSSERVER */ #ifdef NFSCLIENT /* * Asynchronous I/O threads 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; { struct buf *bp, *nbp; int i, myiod; struct vnode *vp; int error = 0, s; /* * Assign my position or return error if too many already running */ myiod = -1; for (i = 0; i < NFS_MAXASYNCDAEMON; i++) if (nfs_asyncdaemon[i] == NULL) { myiod = i; break; } if (myiod == -1) return (EBUSY); nfs_asyncdaemon[myiod] = p; nfs_numasync++; PHOLD(p); /* * Just loop around doin our stuff until SIGKILL */ for (;;) { while (TAILQ_FIRST(&nfs_bufq) == NULL && error == 0) { nfs_iodwant[myiod] = p; error = tsleep((caddr_t)&nfs_iodwant[myiod], PWAIT | PCATCH, "nfsidl", 0); } while ((bp = TAILQ_FIRST(&nfs_bufq)) != 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, NULL); else do { /* * Look for a delayed write for the same vnode, so I can do * it now. We must grab it before calling nfs_doio() to * avoid any risk of the vnode getting vclean()'d while * we are doing the write rpc. */ vp = bp->b_vp; s = splbio(); for (nbp = LIST_FIRST(&vp->v_dirtyblkhd); nbp != NULL; nbp = LIST_NEXT(nbp, b_vnbufs)) { if ((nbp->b_flags & (B_BUSY|B_DELWRI|B_NEEDCOMMIT|B_NOCACHE))!=B_DELWRI) continue; bremfree(nbp); nbp->b_flags |= (B_BUSY|B_ASYNC); break; } /* * For the delayed write, do the first part of nfs_bwrite() * up to, but not including nfs_strategy(). */ if (nbp) { nbp->b_flags &= ~(B_READ|B_DONE|B_ERROR); buf_undirty(bp); nbp->b_vp->v_numoutput++; } splx(s); (void) nfs_doio(bp, NULL); } while ((bp = nbp) != NULL); } if (error) { PRELE(p); nfs_asyncdaemon[myiod] = NULL; nfs_numasync--; return (error); } } } void start_nfsio(arg) void *arg; { nfssvc_iod(curproc); kthread_exit(0); } void nfs_getset_niothreads(set) int set; { int i, have, start; for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) if (nfs_asyncdaemon[i] != NULL) have++; if (set) { /* clamp to sane range */ nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); start = nfs_niothreads - have; while (start > 0) { kthread_create(start_nfsio, NULL, NULL, "nfsio"); start--; } for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) if (nfs_asyncdaemon[i] != NULL) { psignal(nfs_asyncdaemon[i], SIGKILL); start++; } } else { if (nfs_niothreads >= 0) nfs_niothreads = have; } } /* * 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_str, auth_len, verf_str, verf_len, key) struct nfsmount *nmp; struct nfsreq *rep; struct ucred *cred; char **auth_str; int *auth_len; char *verf_str; int *verf_len; NFSKERBKEY_T key; /* return session key */ { 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_authlen = RPCAUTH_MAXSIZ; nmp->nm_verfstr = verf_str; nmp->nm_verflen = *verf_len; 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_len = nmp->nm_authlen; *verf_len = nmp->nm_verflen; bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T)); } 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); } /* * Get a nickname authenticator and verifier. */ int nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) struct nfsmount *nmp; struct ucred *cred; char **auth_str; int *auth_len; char *verf_str; int verf_len; { struct nfsuid *nuidp; u_int32_t *nickp, *verfp; struct timeval ktvin, ktvout; struct timeval tv; #ifdef DIAGNOSTIC if (verf_len < (4 * NFSX_UNSIGNED)) panic("nfs_getnickauth verf too small"); #endif LIST_FOREACH(nuidp, NMUIDHASH(nmp, cred->cr_uid), nu_hash) { if (nuidp->nu_cr.cr_uid == cred->cr_uid) break; } if (!nuidp || nuidp->nu_expire < time_second) return (EACCES); /* * Move to the end of the lru list (end of lru == most recently used). */ TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); *nickp = txdr_unsigned(nuidp->nu_nickname); *auth_str = (char *)nickp; *auth_len = 2 * NFSX_UNSIGNED; /* * Now we must encrypt the verifier and package it up. */ verfp = (u_int32_t *)verf_str; *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); getmicrotime(&tv); if (tv.tv_sec > nuidp->nu_timestamp.tv_sec || (tv.tv_sec == nuidp->nu_timestamp.tv_sec && tv.tv_usec > nuidp->nu_timestamp.tv_usec)) nuidp->nu_timestamp = tv; else nuidp->nu_timestamp.tv_usec++; ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); *verfp++ = ktvout.tv_sec; *verfp++ = ktvout.tv_usec; *verfp = 0; return (0); } /* * Save the current nickname in a hash list entry on the mount point. */ int nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) struct nfsmount *nmp; struct ucred *cred; int len; NFSKERBKEY_T key; struct mbuf **mdp; char **dposp; struct mbuf *mrep; { struct nfsuid *nuidp; u_int32_t *tl; int32_t t1; struct mbuf *md = *mdp; struct timeval ktvin, ktvout; u_int32_t nick; char *dpos = *dposp, *cp2; int deltasec, error = 0; if (len == (3 * NFSX_UNSIGNED)) { nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); ktvin.tv_sec = *tl++; ktvin.tv_usec = *tl++; nick = fxdr_unsigned(u_int32_t, *tl); ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); deltasec = time_second - ktvout.tv_sec; if (deltasec < 0) deltasec = -deltasec; /* * If ok, add it to the hash list for the mount point. */ if (deltasec <= NFS_KERBCLOCKSKEW) { if (nmp->nm_numuids < nuidhash_max) { nmp->nm_numuids++; nuidp = (struct nfsuid *) malloc(sizeof (struct nfsuid), M_NFSUID, M_WAITOK); } else { nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); } nuidp->nu_flag = 0; nuidp->nu_cr.cr_uid = cred->cr_uid; nuidp->nu_expire = time_second + NFS_KERBTTL; nuidp->nu_timestamp = ktvout; nuidp->nu_nickname = nick; bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T)); TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), nuidp, nu_hash); } } else nfsm_adv(nfsm_rndup(len)); nfsmout: *mdp = md; *dposp = dpos; return (error); } #endif /* NFSCLIENT */