/* * 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 8.5 (Berkeley) 3/30/95 * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $ * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.19 2004/11/12 00:09:37 dillon Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "xdr_subs.h" #include "rpcv2.h" #include "nfsproto.h" #include "nfs.h" #include "nfsm_subs.h" #include "nfsrvcache.h" #include "nfsmount.h" #include "nfsnode.h" #include "nqnfs.h" #include "nfsrtt.h" static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); /* Global defs. */ extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mreqp); extern int nfs_numasync; extern time_t nqnfsstarttime; extern int nqsrv_writeslack; extern int nfsrtton; extern struct nfsstats nfsstats; extern int nfsrvw_procrastinate; extern int nfsrvw_procrastinate_v3; static int nuidhash_max = NFS_MAXUIDHASH; #ifndef NFS_NOSERVER static void nfsrv_zapsock (struct nfssvc_sock *slp); #endif static int nfssvc_iod (struct thread *); #define TRUE 1 #define FALSE 0 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; SYSCTL_DECL(_vfs_nfs); #ifndef NFS_NOSERVER int nfsd_waiting = 0; static struct nfsdrt nfsdrt; static int nfs_numnfsd = 0; static int notstarted = 1; static int modify_flag = 0; static void nfsd_rt (int sotype, struct nfsrv_descript *nd, int cacherep); static int nfssvc_addsock (struct file *, struct sockaddr *, struct thread *); static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *); static int nfs_privport = 0; SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, ""); SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, ""); SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, ""); static int nfs_soreserve = 65535; SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, ""); /* * NFS server system calls */ #endif /* NFS_NOSERVER */ /* * nfssvc_args(int flag, caddr_t argp) * * 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 */ int nfssvc(struct nfssvc_args *uap) { #ifndef NFS_NOSERVER struct nlookupdata nd; struct file *fp; struct sockaddr *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; struct nfsmount *nmp; struct vnode *vp; #endif /* NFS_NOSERVER */ int error; struct thread *td = curthread; /* * Must be super user */ error = suser(td); if(error) return (error); KKASSERT(td->td_proc); /* for ucred and p_fd */ while (nfssvc_sockhead_flag & SLP_INIT) { nfssvc_sockhead_flag |= SLP_WANTINIT; (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0); } if (uap->flag & NFSSVC_BIOD) error = nfssvc_iod(td); #ifdef NFS_NOSERVER else error = ENXIO; #else /* !NFS_NOSERVER */ else if (uap->flag & NFSSVC_MNTD) { error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); if (error) return (error); vp = NULL; error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE, NLC_FOLLOW); if (error == 0) error = nlookup(&nd); if (error == 0) error = cache_vget(nd.nl_ncp, nd.nl_cred, LK_EXCLUSIVE, &vp); nlookup_done(&nd); if (error) return (error); if ((vp->v_flag & VROOT) == 0) error = EINVAL; nmp = VFSTONFS(vp->v_mount); vput(vp); if (error) return (error); if ((nmp->nm_state & NFSSTA_MNTD) && (uap->flag & NFSSVC_GOTAUTH) == 0) return (0); nmp->nm_state |= NFSSTA_MNTD; error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag, uap->argp, td); } else if (uap->flag & NFSSVC_ADDSOCK) { error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); if (error) return (error); error = holdsock(td->td_proc->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 sockaddr *)0; else { error = getsockaddr(&nam, nfsdarg.name, nfsdarg.namelen); if (error) { fdrop(fp, td); return (error); } } error = nfssvc_addsock(fp, nam, td); fdrop(fp, td); } else { error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); if (error) return (error); if ((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. */ for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 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) FREE(nuidp->nu_nam, M_SONAME); } 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 = (struct sockaddr_in *) nfsd->nfsd_nd->nd_nam2; switch (saddr->sin_family) { case AF_INET: nuidp->nu_flag |= NU_INETADDR; nuidp->nu_inetaddr = saddr->sin_addr.s_addr; break; case AF_ISO: default: nuidp->nu_flag |= NU_NAM; nuidp->nu_nam = dup_sockaddr(nfsd->nfsd_nd->nd_nam2); 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 ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) nfsd->nfsd_flag |= NFSD_AUTHFAIL; error = nfssvc_nfsd(nsd, uap->argp, td); } #endif /* NFS_NOSERVER */ if (error == EINTR || error == ERESTART) error = 0; return (error); } #ifndef NFS_NOSERVER /* * Adds a socket to the list for servicing by nfsds. */ static int nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td) { int siz; struct nfssvc_sock *slp; struct socket *so; int error, s; so = (struct socket *)fp->f_data; #if 0 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) { if (mynam != NULL) FREE(mynam, M_SONAME); return (EPERM); } } #endif /* * Reserve buffer space in the socket. Note that due to bugs in * Linux's delayed-ack code, serious performance degredation may * occur with linux hosts if the minimum is used. */ if (so->so_type == SOCK_STREAM) siz = NFS_MAXPACKET + sizeof (u_long); else siz = NFS_MAXPACKET; if (siz < nfs_soreserve) siz = nfs_soreserve; if (siz > sb_max_adj) { printf("Warning: vfs.nfs.soreserve (%d) " "limited to adjusted sb_max (%ld)\n", nfs_soreserve, sb_max_adj); siz = sb_max_adj; } error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]); if (error) { if (mynam != NULL) FREE(mynam, M_SONAME); 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) { struct sockopt sopt; int val; bzero(&sopt, sizeof sopt); sopt.sopt_level = SOL_SOCKET; sopt.sopt_name = SO_KEEPALIVE; sopt.sopt_val = &val; sopt.sopt_valsize = sizeof val; val = 1; sosetopt(so, &sopt); } if (so->so_proto->pr_domain->dom_family == AF_INET && so->so_proto->pr_protocol == IPPROTO_TCP) { struct sockopt sopt; int val; bzero(&sopt, sizeof sopt); sopt.sopt_level = IPPROTO_TCP; sopt.sopt_name = TCP_NODELAY; sopt.sopt_val = &val; sopt.sopt_valsize = sizeof val; val = 1; sosetopt(so, &sopt); } 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; slp = (struct nfssvc_sock *) malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); STAILQ_INIT(&slp->ns_rec); 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 = splnet(); so->so_upcallarg = (caddr_t)slp; so->so_upcall = nfsrv_rcv; so->so_rcv.sb_flags |= SB_UPCALL; 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. */ static int nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td) { int siz; struct nfssvc_sock *slp; struct nfsd *nfsd = nsd->nsd_nfsd; struct nfsrv_descript *nd = NULL; struct mbuf *m, *mreq; int error = 0, cacherep, s, sotype, writes_todo; int procrastinate; u_quad_t cur_usec; #ifndef nolint cacherep = RC_DOIT; writes_todo = 0; #endif 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)); s = splnet(); nfsd->nfsd_td = td; TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); nfs_numnfsd++; } else s = splnet(); /* * 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, PCATCH, "nfsd", 0); nfsd_waiting--; if (error) goto done; } if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && (nfsd_head_flag & NFSD_CHECKSLP) != 0) { TAILQ_FOREACH(slp, &nfssvc_sockhead, 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) { if (slp->ns_flag & SLP_DISCONN) nfsrv_zapsock(slp); else if (slp->ns_flag & SLP_NEEDQ) { slp->ns_flag &= ~SLP_NEEDQ; (void) nfs_slplock(slp, 1); nfsrv_rcv(slp->ns_so, (caddr_t)slp, MB_WAIT); nfs_slpunlock(slp); } error = nfsrv_dorec(slp, nfsd, &nd); cur_usec = nfs_curusec(); if (error && slp->ns_tq.lh_first && slp->ns_tq.lh_first->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); sotype = slp->ns_so->so_type; 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 = ((struct sockaddr_in *) nd->nd_nam)->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))) return (ENEEDAUTH); cacherep = RC_DROPIT; } else cacherep = nfsrv_getcache(nd, slp, &mreq); /* * Check for just starting up for NQNFS and send * fake "try again later" replies to the NQNFS clients. */ if (notstarted && nqnfsstarttime <= time_second) { if (modify_flag) { nqnfsstarttime = time_second + nqsrv_writeslack; modify_flag = 0; } else notstarted = 0; } if (notstarted) { if ((nd->nd_flag & ND_NQNFS) == 0) 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 (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; } else if (nfs_privport) { /* Check if source port is privileged */ u_short port; struct sockaddr *nam = nd->nd_nam; struct sockaddr_in *sin; sin = (struct sockaddr_in *)nam; port = ntohs(sin->sin_port); if (port >= IPPORT_RESERVED && nd->nd_procnum != NFSPROC_NULL) { nd->nd_procnum = NFSPROC_NOOP; nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); cacherep = RC_DOIT; printf("NFS request from unprivileged port (%s:%d)\n", inet_ntoa(sin->sin_addr), port); } } } /* * Loop to get all the write rpc relies that have been * gathered together. */ do { switch (cacherep) { case RC_DOIT: if (nd && (nd->nd_flag & ND_NFSV3)) procrastinate = nfsrvw_procrastinate_v3; else procrastinate = nfsrvw_procrastinate; if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && procrastinate > 0 && !notstarted)) error = nfsrv_writegather(&nd, slp, nfsd->nfsd_td, &mreq); else error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, slp, nfsd->nfsd_td, &mreq); if (mreq == NULL) break; if (error != 0 && error != NFSERR_RETVOID) { if (nd->nd_procnum != NQNFSPROC_VACATED) nfsstats.srv_errs++; nfsrv_updatecache(nd, FALSE, mreq); if (nd->nd_nam2) FREE(nd->nd_nam2, M_SONAME); 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, MB_WAIT); if (m == NULL) return (ENOBUFS); *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); } if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) (void) nfs_slplock(slp, 1); if (slp->ns_flag & SLP_VALID) error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); else { error = EPIPE; m_freem(m); } if (nfsrtton) nfsd_rt(sotype, nd, cacherep); if (nd->nd_nam2) FREE(nd->nd_nam2, M_SONAME); if (nd->nd_mrep) m_freem(nd->nd_mrep); if (error == EPIPE) nfsrv_zapsock(slp); if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) nfs_slpunlock(slp); if (error == EINTR || error == ERESTART) { free((caddr_t)nd, M_NFSRVDESC); nfsrv_slpderef(slp); s = splnet(); goto done; } break; case RC_DROPIT: if (nfsrtton) nfsd_rt(sotype, nd, cacherep); m_freem(nd->nd_mrep); if (nd->nd_nam2) FREE(nd->nd_nam2, M_SONAME); break; }; if (nd) { FREE((caddr_t)nd, M_NFSRVDESC); nd = NULL; } /* * Check to see if there are outstanding writes that * need to be serviced. */ cur_usec = nfs_curusec(); s = splsoftclock(); if (slp->ns_tq.lh_first && slp->ns_tq.lh_first->nd_time <= cur_usec) { cacherep = RC_DOIT; writes_todo = 1; } else writes_todo = 0; splx(s); } while (writes_todo); s = splnet(); if (nfsrv_dorec(slp, nfsd, &nd)) { nfsd->nfsd_flag &= ~NFSD_REQINPROG; nfsd->nfsd_slp = NULL; nfsrv_slpderef(slp); } } done: 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. */ static void nfsrv_zapsock(struct nfssvc_sock *slp) { struct nfsuid *nuidp, *nnuidp; struct nfsrv_descript *nwp, *nnwp; struct socket *so; struct file *fp; struct nfsrv_rec *rec; int s; slp->ns_flag &= ~SLP_ALLFLAGS; fp = slp->ns_fp; if (fp) { slp->ns_fp = (struct file *)0; so = slp->ns_so; so->so_rcv.sb_flags &= ~SB_UPCALL; so->so_upcall = NULL; so->so_upcallarg = NULL; soshutdown(so, 2); closef(fp, NULL); if (slp->ns_nam) FREE(slp->ns_nam, M_SONAME); m_freem(slp->ns_raw); while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); if (rec->nr_address) FREE(rec->nr_address, M_SONAME); m_freem(rec->nr_packet); free(rec, M_NFSRVDESC); } TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru, nnuidp) { LIST_REMOVE(nuidp, nu_hash); TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); if (nuidp->nu_flag & NU_NAM) FREE(nuidp->nu_nam, M_SONAME); free((caddr_t)nuidp, M_NFSUID); } s = splsoftclock(); for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { nnwp = nwp->nd_tq.le_next; 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(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); } } /* * Lock a socket against others. */ int nfs_slplock(struct nfssvc_sock *slp, int wait) { int *statep = &slp->ns_solock; if (!wait && (*statep & NFSSTA_SNDLOCK)) return(0); /* already locked, fail */ while (*statep & NFSSTA_SNDLOCK) { *statep |= NFSSTA_WANTSND; (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0); } *statep |= NFSSTA_SNDLOCK; return (1); } /* * Unlock the stream socket for others. */ void nfs_slpunlock(struct nfssvc_sock *slp) { int *statep = &slp->ns_solock; if ((*statep & NFSSTA_SNDLOCK) == 0) panic("nfs slpunlock"); *statep &= ~NFSSTA_SNDLOCK; if (*statep & NFSSTA_WANTSND) { *statep &= ~NFSSTA_WANTSND; wakeup((caddr_t)statep); } } /* * Initialize the data structures for the server. * Handshake with any new nfsds starting up to avoid any chance of * corruption. */ void nfsrv_init(int terminating) { struct nfssvc_sock *slp, *nslp; if (nfssvc_sockhead_flag & SLP_INIT) panic("nfsd init"); nfssvc_sockhead_flag |= SLP_INIT; if (terminating) { TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) { if (slp->ns_flag & SLP_VALID) nfsrv_zapsock(slp); TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); free((caddr_t)slp, M_NFSSVC); } nfsrv_cleancache(); /* And clear out server cache */ } else nfs_pub.np_valid = 0; TAILQ_INIT(&nfssvc_sockhead); nfssvc_sockhead_flag &= ~SLP_INIT; if (nfssvc_sockhead_flag & SLP_WANTINIT) { nfssvc_sockhead_flag &= ~SLP_WANTINIT; wakeup((caddr_t)&nfssvc_sockhead); } TAILQ_INIT(&nfsd_head); nfsd_head_flag &= ~NFSD_CHECKSLP; #if 0 nfs_udpsock = (struct nfssvc_sock *) malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); STAILQ_INIT(&nfs_udpsock->ns_rec); 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)); STAILQ_INIT(&nfs_cltpsock->ns_rec); TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); #endif } /* * Add entries to the server monitor log. */ static void nfsd_rt(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; if (nd->nd_flag & ND_NQNFS) rt->flag |= DRT_NQNFS; else if (nd->nd_flag & ND_NFSV3) rt->flag |= DRT_NFSV3; rt->proc = nd->nd_procnum; if (nd->nd_nam->sa_family == AF_INET) rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; else rt->ipadr = INADDR_ANY; rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); getmicrotime(&rt->tstamp); nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; } #endif /* NFS_NOSERVER */ static int nfs_defect = 0; SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, ""); /* * 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. */ static int nfssvc_iod(struct thread *td) { struct buf *bp; int i, myiod; struct nfsmount *nmp; 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 (((nmp = nfs_iodmount[myiod]) == NULL || TAILQ_EMPTY(&nmp->nm_bufq)) && error == 0) { if (nmp) nmp->nm_bufqiods--; nfs_iodwant[myiod] = td; nfs_iodmount[myiod] = NULL; error = tsleep((caddr_t)&nfs_iodwant[myiod], PCATCH, "nfsidl", 0); } if (error) { nfs_asyncdaemon[myiod] = 0; if (nmp) nmp->nm_bufqiods--; nfs_iodwant[myiod] = NULL; nfs_iodmount[myiod] = NULL; nfs_numasync--; return (error); } while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { /* Take one off the front of the list */ TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); nmp->nm_bufqlen--; if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) { nmp->nm_bufqwant = FALSE; wakeup(&nmp->nm_bufq); } (void) nfs_doio(bp, NULL); /* * If there are more than one iod on this mount, then defect * so that the iods can be shared out fairly between the mounts */ if (nfs_defect && nmp->nm_bufqiods > 1) { NFS_DPF(ASYNCIO, ("nfssvc_iod: iod %d defecting from mount %p\n", myiod, nmp)); nfs_iodmount[myiod] = NULL; nmp->nm_bufqiods--; break; } } } } /* * 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(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_state & NFSSTA_WAITAUTH) == 0) { nmp->nm_state |= NFSSTA_WANTAUTH; (void) tsleep((caddr_t)&nmp->nm_authtype, 0, "nfsauth1", 2 * hz); error = nfs_sigintr(nmp, rep, rep->r_td); if (error) { nmp->nm_state &= ~NFSSTA_WANTAUTH; return (error); } } nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_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_state & NFSSTA_HASAUTH) == 0 && error == 0) { (void) tsleep((caddr_t)&nmp->nm_authlen, 0, "nfsauth2", 2 * hz); error = nfs_sigintr(nmp, rep, rep->r_td); } if (nmp->nm_state & NFSSTA_AUTHERR) { nmp->nm_state &= ~NFSSTA_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 (key)); } nmp->nm_state &= ~NFSSTA_HASAUTH; nmp->nm_state |= NFSSTA_WAITAUTH; if (nmp->nm_state & NFSSTA_WANTAUTH) { nmp->nm_state &= ~NFSSTA_WANTAUTH; wakeup((caddr_t)&nmp->nm_authtype); } return (error); } /* * Get a nickname authenticator and verifier. */ int nfs_getnickauth(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; #ifdef DIAGNOSTIC if (verf_len < (4 * NFSX_UNSIGNED)) panic("nfs_getnickauth verf too small"); #endif for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 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); if (time_second > nuidp->nu_timestamp.tv_sec || (time_second == nuidp->nu_timestamp.tv_sec && time_second > nuidp->nu_timestamp.tv_usec)) getmicrotime(&nuidp->nu_timestamp); 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); /* * Now encrypt the timestamp verifier in ecb mode using the session * key. */ #ifdef NFSKERB XXX #endif *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(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); /* * Decrypt the timestamp in ecb mode. */ #ifdef NFSKERB XXX #endif 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 (key)); 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); }