/* $FreeBSD$ */ /* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */ /* * copyright (c) 2003 * the regents of the university of michigan * all rights reserved * * permission is granted to use, copy, create derivative works and redistribute * this software and such derivative works for any purpose, so long as the name * of the university of michigan is not used in any advertising or publicity * pertaining to the use or distribution of this software without specific, * written prior authorization. if the above copyright notice or any other * identification of the university of michigan is included in any copy of any * portion of this software, then the disclaimer below must also be included. * * this software is provided as is, without representation from the university * of michigan as to its fitness for any purpose, and without warranty by the * university of michigan of any kind, either express or implied, including * without limitation the implied warranties of merchantability and fitness for * a particular purpose. the regents of the university of michigan shall not be * liable for any damages, including special, indirect, incidental, or * consequential damages, with respect to any claim arising out of or in * connection with the use of the software, even if it has been or is hereafter * advised of the possibility of such damages. */ /* * Copyright (c) 1989, 1993, 1995 * 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_vfsops.c 8.12 (Berkeley) 5/20/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_bootp.h" #include "opt_nfsroot.h" #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 #include #include #include #include SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem"); SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, &nfsstats, nfsstats, "S,nfsstats"); #ifdef NFS_DEBUG int nfs_debug; SYSCTL_INT(_vfs_nfs4, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); #endif static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp); static void nfs4_daemon(void *arg); static int mountnfs(struct nfs_args *, struct mount *, struct sockaddr *, char *, char *, struct vnode **, struct ucred *cred); static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred); static vfs_mount_t nfs_mount; static vfs_unmount_t nfs_unmount; static vfs_root_t nfs_root; static vfs_statfs_t nfs_statfs; static vfs_sync_t nfs_sync; /* * nfs vfs operations. */ static struct vfsops nfs_vfsops = { .vfs_init = nfs4_init, .vfs_mount = nfs_mount, .vfs_root = nfs_root, .vfs_statfs = nfs_statfs, .vfs_sync = nfs_sync, .vfs_uninit = nfs4_uninit, .vfs_unmount = nfs_unmount, }; VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK); /* So that loader and kldload(2) can find us, wherever we are.. */ MODULE_VERSION(nfs4, 1); void nfsargs_ntoh(struct nfs_args *); #ifdef NFS4DISKLESS /* * This structure must be filled in by a primary bootstrap or bootstrap * server for a diskless/dataless machine. It is initialized below just * to ensure that it is allocated to initialized data (.data not .bss). */ struct nfs_diskless nfs_diskless = { { { 0 } } }; struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; int nfs_diskless_valid = 0; SYSCTL_INT(_vfs_nfs4, OID_AUTO, diskless_valid, CTLFLAG_RD, &nfs_diskless_valid, 0, ""); SYSCTL_STRING(_vfs_nfs4, OID_AUTO, diskless_rootpath, CTLFLAG_RD, nfsv3_diskless.root_hostnam, 0, ""); SYSCTL_OPAQUE(_vfs_nfs4, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, "%Ssockaddr_in", ""); SYSCTL_STRING(_vfs_nfs4, OID_AUTO, diskless_swappath, CTLFLAG_RD, nfsv3_diskless.swap_hostnam, 0, ""); SYSCTL_OPAQUE(_vfs_nfs4, OID_AUTO, diskless_swapaddr, CTLFLAG_RD, &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr, "%Ssockaddr_in",""); static int nfs_mountdiskless(char *, char *, int, struct sockaddr_in *, struct nfs_args *, struct thread *, struct vnode **, struct mount **); static void nfs_convert_diskless(void); static void nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs); static void nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) { args->version = NFS_ARGSVERSION; args->addr = oargs->addr; args->addrlen = oargs->addrlen; args->sotype = oargs->sotype; args->proto = oargs->proto; args->fh = oargs->fh; args->fhsize = oargs->fhsize; args->flags = oargs->flags; args->wsize = oargs->wsize; args->rsize = oargs->rsize; args->readdirsize = oargs->readdirsize; args->timeo = oargs->timeo; args->retrans = oargs->retrans; args->maxgrouplist = oargs->maxgrouplist; args->readahead = oargs->readahead; args->deadthresh = oargs->deadthresh; args->hostname = oargs->hostname; } static void nfs_convert_diskless(void) { bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, sizeof(struct ifaliasreq)); bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, sizeof(struct sockaddr_in)); nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); nfsv3_diskless.root_fhsize = NFSX_V2FH; bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, sizeof(struct sockaddr_in)); bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); nfsv3_diskless.root_time = nfs_diskless.root_time; bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, MAXHOSTNAMELEN); nfs_diskless_valid = 3; } #endif int nfs4_init(struct vfsconf *vfsp) { rpcclnt_init(); nfs4dev_init(); idmap_init(); nfsm_v4init(); return (0); } int nfs4_uninit(struct vfsconf *vfsp) { rpcclnt_uninit(); nfs4dev_uninit(); idmap_uninit(); return (0); } /* * nfs statfs call */ static int nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) { struct vnode *vp; struct nfs_statfs *sfp; caddr_t bpos, dpos; struct nfsmount *nmp = VFSTONFS(mp); int error = 0; struct mbuf *mreq, *mrep = NULL, *md, *mb; struct nfsnode *np; struct nfs4_compound cp; struct nfs4_oparg_getattr ga; struct nfsv4_fattr *fap = &ga.fa; #ifndef nolint sfp = NULL; #endif error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); if (error) return (error); vp = NFSTOV(np); nfsstats.rpccnt[NFSPROC_FSSTAT]++; mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1)); mb = mreq; bpos = mtod(mb, caddr_t); ga.bm = &nfsv4_fsattrbm; nfs_v4initcompound(&cp); nfsm_v4build_compound(&cp, "statfs()"); nfsm_v4build_putfh(&cp, vp); nfsm_v4build_getattr(&cp, &ga); nfsm_v4build_finalize(&cp); nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred); if (error != 0) goto nfsmout; nfsm_v4dissect_compound(&cp); nfsm_v4dissect_putfh(&cp); nfsm_v4dissect_getattr(&cp, &ga); nfs4_vfsop_statfs(fap, sbp, mp); nfsmout: error = nfs_v4postop(&cp, error); vput(vp); if (mrep != NULL) m_freem(mrep); return (error); } static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp) { int s; int adjsock; int maxio; s = splnet(); /* * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes * no sense in that context. */ if (argp->sotype == SOCK_STREAM) nmp->nm_flag &= ~NFSMNT_NOCONN; nmp->nm_flag &= ~NFSMNT_RDIRPLUS; /* Re-bind if rsrvd port requested and wasn't on one */ adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) && (argp->flags & NFSMNT_RESVPORT); /* Also re-bind if we're switching to/from a connected UDP socket */ adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != (argp->flags & NFSMNT_NOCONN)); /* Update flags atomically. Don't change the lock bits. */ nmp->nm_flag = argp->flags | nmp->nm_flag; splx(s); if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; if (nmp->nm_timeo < NFS_MINTIMEO) nmp->nm_timeo = NFS_MINTIMEO; else if (nmp->nm_timeo > NFS_MAXTIMEO) nmp->nm_timeo = NFS_MAXTIMEO; } if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { nmp->nm_retry = argp->retrans; if (nmp->nm_retry > NFS_MAXREXMIT) nmp->nm_retry = NFS_MAXREXMIT; } if (argp->flags & NFSMNT_NFSV3) { if (argp->sotype == SOCK_DGRAM) maxio = NFS_MAXDGRAMDATA; else maxio = NFS_MAXDATA; } else maxio = NFS_V2MAXDATA; if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { nmp->nm_wsize = argp->wsize; /* Round down to multiple of blocksize */ nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); if (nmp->nm_wsize <= 0) nmp->nm_wsize = NFS_FABLKSIZE; } if (nmp->nm_wsize > maxio) nmp->nm_wsize = maxio; if (nmp->nm_wsize > MAXBSIZE) nmp->nm_wsize = MAXBSIZE; if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { nmp->nm_rsize = argp->rsize; /* Round down to multiple of blocksize */ nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); if (nmp->nm_rsize <= 0) nmp->nm_rsize = NFS_FABLKSIZE; } if (nmp->nm_rsize > maxio) nmp->nm_rsize = maxio; if (nmp->nm_rsize > MAXBSIZE) nmp->nm_rsize = MAXBSIZE; if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { nmp->nm_readdirsize = argp->readdirsize; } if (nmp->nm_readdirsize > maxio) nmp->nm_readdirsize = maxio; if (nmp->nm_readdirsize > nmp->nm_rsize) nmp->nm_readdirsize = nmp->nm_rsize; if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) nmp->nm_acregmin = argp->acregmin; else nmp->nm_acregmin = NFS_MINATTRTIMO; if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) nmp->nm_acregmax = argp->acregmax; else nmp->nm_acregmax = NFS_MAXATTRTIMO; if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) nmp->nm_acdirmin = argp->acdirmin; else nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) nmp->nm_acdirmax = argp->acdirmax; else nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; if (nmp->nm_acdirmin > nmp->nm_acdirmax) nmp->nm_acdirmin = nmp->nm_acdirmax; if (nmp->nm_acregmin > nmp->nm_acregmax) nmp->nm_acregmin = nmp->nm_acregmax; if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { if (argp->maxgrouplist <= NFS_MAXGRPS) nmp->nm_numgrps = argp->maxgrouplist; else nmp->nm_numgrps = NFS_MAXGRPS; } if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { if (argp->readahead <= NFS_MAXRAHEAD) nmp->nm_readahead = argp->readahead; else nmp->nm_readahead = NFS_MAXRAHEAD; } if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) { if (argp->deadthresh <= NFS_MAXDEADTHRESH) nmp->nm_deadthresh = argp->deadthresh; else nmp->nm_deadthresh = NFS_MAXDEADTHRESH; } adjsock |= ((nmp->nm_sotype != argp->sotype) || (nmp->nm_soproto != argp->proto)); nmp->nm_sotype = argp->sotype; nmp->nm_soproto = argp->proto; if (nmp->nm_rpcclnt.rc_so && adjsock) { nfs_safedisconnect(nmp); if (nmp->nm_sotype == SOCK_DGRAM) { while (nfs4_connect(nmp)) { printf("nfs_args: retrying connect\n"); (void) tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0); } } } } /* * VFS Operations. * * mount system call * It seems a bit dumb to copyinstr() the host and path here and then * bcopy() them in mountnfs(), but I wanted to detect errors before * doing the sockargs() call because sockargs() allocates an mbuf and * an error after that means that I have to release the mbuf. */ /* ARGSUSED */ static int nfs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, struct thread *td) { int error; struct nfs_args args; struct sockaddr *nam; struct vnode *vp; char hst[MNAMELEN]; size_t len; if (path == NULL) { printf("NFSv4: nfs_mountroot not supported\n"); return EINVAL; } error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); if (error) return (error); if (args.version != NFS_ARGSVERSION) return (EPROGMISMATCH); if (mp->mnt_flag & MNT_UPDATE) { struct nfsmount *nmp = VFSTONFS(mp); if (nmp == NULL) return (EIO); /* * When doing an update, we can't change from or to * v3, switch lockd strategies or change cookie translation */ args.flags = (args.flags & ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) | (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)); nfs_decode_args(nmp, &args); return (0); } if (error) return (error); error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); if (error) return (error); bzero(&hst[len], MNAMELEN - len); /* sockargs() call must be after above copyin() calls */ error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); if (error) return (error); error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred); return (error); } /* * renew should be done async * should re-scan mount queue each time */ struct proc *nfs4_daemonproc; static int nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred) { struct nfs4_compound cp; struct mbuf *mreq, *mrep = NULL, *md, *mb; caddr_t bpos, dpos; int error; mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t)); mb = mreq; bpos = mtod(mb, caddr_t); nfs_v4initcompound(&cp); nfsm_v4build_compound(&cp, "nfs4_do_renew()"); nfsm_v4build_renew(&cp, nmp->nm_clientid); nfsm_v4build_finalize(&cp); nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred); if (error != 0) goto nfsmout; nfsm_v4dissect_compound(&cp); nfsm_v4dissect_renew(&cp); nmp->nm_last_renewal = time_second; return (0); nfsmout: error = nfs_v4postop(&cp, error); /* XXX */ if (mrep != NULL) m_freem(mrep); return (error); } static void nfs4_daemon(void *arg) { struct mount *mp; struct nfsmount *nmp; int nmounts; while (1) { nmounts = 0; mtx_lock(&mountlist_mtx); TAILQ_FOREACH(mp, &mountlist, mnt_list) { if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0) continue; nmounts++; nmp = VFSTONFS(mp); if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4) continue; mtx_unlock(&mountlist_mtx); mtx_lock(&Giant); nfs4_do_renew(nmp, (struct ucred *) arg); mtx_unlock(&Giant); mtx_lock(&mountlist_mtx); } mtx_unlock(&mountlist_mtx); /* Must kill the daemon here, or module unload will cause a panic */ if (nmounts == 0) { mtx_lock(&Giant); nfs4_daemonproc = NULL; printf("nfsv4 renewd exiting\n"); kthread_exit(0); } tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz); } } /* * Common code for mount and mountroot */ static int mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, char *pth, char *hst, struct vnode **vpp, struct ucred *cred) { struct nfsmount *nmp; char *rpth, *cp1, *cp2; int nlkup = 0, error; struct nfs4_compound cp; struct mbuf *mreq, *mrep = NULL, *md, *mb; caddr_t bpos, dpos; struct nfs4_oparg_lookup lkup; struct nfs4_oparg_getfh gfh; struct nfs4_oparg_getattr ga; struct thread *td = curthread; /* XXX */ if (mp->mnt_flag & MNT_UPDATE) { nmp = VFSTONFS(mp); /* update paths, file handles, etc, here XXX */ FREE(nam, M_SONAME); return (0); } else { nmp = uma_zalloc(nfsmount_zone, M_WAITOK); bzero((caddr_t)nmp, sizeof (struct nfsmount)); TAILQ_INIT(&nmp->nm_bufq); mp->mnt_data = (qaddr_t)nmp; } vfs_getnewfsid(mp); nmp->nm_mountp = mp; nmp->nm_maxfilesize = 0xffffffffLL; nmp->nm_timeo = NFS_TIMEO; nmp->nm_retry = NFS_RETRANS; nmp->nm_wsize = NFS_WSIZE; nmp->nm_rsize = NFS_RSIZE; nmp->nm_readdirsize = NFS_READDIRSIZE; nmp->nm_numgrps = NFS_MAXGRPS; nmp->nm_readahead = NFS_DEFRAHEAD; nmp->nm_deadthresh = NFS_MAXDEADTHRESH; bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); nmp->nm_nam = nam; /* Set up the sockets and per-host congestion */ nmp->nm_sotype = argp->sotype; nmp->nm_soproto = argp->proto; /* XXX */ mp->mnt_stat.f_iosize = PAGE_SIZE; /* XXX - this is to make some other code work. Sort of ugly. */ argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4); nfs_decode_args(nmp, argp); if ((error = nfs4_connect(nmp))) goto bad; mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1)); mb = mreq; bpos = mtod(mb, caddr_t); ga.bm = &nfsv4_fsinfobm; nfs_v4initcompound(&cp); /* Get remote path */ rpth = hst; strsep(&rpth, ":"); nfsm_v4build_compound(&cp, "mountnfs()"); nfsm_v4build_putrootfh(&cp); for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) { while (*cp1 == '/') cp1++; if (!*cp1) break; for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++) ; lkup.name = cp1; lkup.namelen = cp2 - cp1; nfsm_v4build_lookup(&cp, &lkup); nlkup++; } nfsm_v4build_getfh(&cp, &gfh); nfsm_v4build_getattr(&cp, &ga); nfsm_v4build_finalize(&cp); nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred); if (error != 0) goto nfsmout; nfsm_v4dissect_compound(&cp); nfsm_v4dissect_putrootfh(&cp); while (nlkup--) nfsm_v4dissect_lookup(&cp); nfsm_v4dissect_getfh(&cp, &gfh); nfsm_v4dissect_getattr(&cp, &ga); nfs4_vfsop_fsinfo(&ga.fa, nmp); nmp->nm_state |= NFSSTA_GOTFSINFO; /* Copy root fh into nfsmount. */ nmp->nm_fhsize = gfh.fh_len; bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize); nmp->nm_last_renewal = time_second; if ((error = nfs4_do_setclientid(nmp, cred)) != 0) goto nfsmout; /* Start renewd if it isn't already running */ if (nfs4_daemonproc == NULL) kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc, (RFPROC|RFMEM), 0, "nfs4rd"); return (0); nfsmout: error = nfs_v4postop(&cp, error); /* XXX */ if (mrep != NULL) m_freem(mrep); bad: nfs_disconnect(nmp); uma_zfree(nfsmount_zone, nmp); FREE(nam, M_SONAME); return (error); } /* * unmount system call */ static int nfs_unmount(struct mount *mp, int mntflags, struct thread *td) { struct nfsmount *nmp; int error, flags = 0; if (mntflags & MNT_FORCE) flags |= FORCECLOSE; nmp = VFSTONFS(mp); /* * Goes something like this.. * - Call vflush() to clear out vnodes for this filesystem * - Close the socket * - Free up the data structures */ /* In the forced case, cancel any outstanding requests. */ if (flags & FORCECLOSE) { error = nfs_nmcancelreqs(nmp); if (error) return (error); nfs4dev_purge(); } error = vflush(mp, 0, flags); if (error) return (error); /* * We are now committed to the unmount. */ nfs_disconnect(nmp); FREE(nmp->nm_nam, M_SONAME); /* XXX there's a race condition here for SMP */ wakeup(&nfs4_daemonproc); uma_zfree(nfsmount_zone, nmp); return (0); } /* * Return root of a filesystem */ static int nfs_root(struct mount *mp, struct vnode **vpp) { struct vnode *vp; struct nfsmount *nmp; struct nfsnode *np; int error; nmp = VFSTONFS(mp); error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); if (error) return (error); vp = NFSTOV(np); if (vp->v_type == VNON) vp->v_type = VDIR; vp->v_vflag |= VV_ROOT; *vpp = vp; return (0); } /* * Flush out the buffer cache */ /* ARGSUSED */ static int nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td) { struct vnode *vp, *vnp; int error, allerror = 0; /* * Force stale buffer cache information to be flushed. */ MNT_ILOCK(mp); loop: for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = vnp) { /* * If the vnode that we are about to sync is no longer * associated with this mount point, start over. */ if (vp->v_mount != mp) goto loop; vnp = TAILQ_NEXT(vp, v_nmntvnodes); VI_LOCK(vp); MNT_IUNLOCK(mp); if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY) { VI_UNLOCK(vp); MNT_ILOCK(mp); continue; } if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { goto loop; } error = VOP_FSYNC(vp, cred, waitfor, td); if (error) allerror = error; VOP_UNLOCK(vp, 0, td); vrele(vp); MNT_ILOCK(mp); } MNT_IUNLOCK(mp); return (allerror); } static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred) { struct nfs4_oparg_setclientid scid; struct nfs4_compound cp; struct mbuf *mreq, *mrep = NULL, *md, *mb; caddr_t bpos, dpos; struct route ro; char *ipsrc = NULL, uaddr[24], name[24]; int try = 0; static int seq; int error; #ifndef NFS4_USE_RPCCLNT return (0); #endif if (nmp->nm_clientid) { printf("nfs4_do_setclientid: already have clientid!\n"); error = 0; goto nfsmout; } /* Try not to re-use clientids */ if (seq == 0) seq = time_second & 0xffffff; #ifdef NFS4_USE_RPCCLNT scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp"; #endif scid.cb_netid = "tcp"; scid.cb_netidlen = 3; scid.cb_prog = 0x1234; /* XXX */ /* Do a route lookup to find our source address for talking to this server */ bzero(&ro, sizeof ro); #ifdef NFS4_USE_RPCCLNT ro.ro_dst = *nmp->nm_rpcclnt.rc_name; #endif rtalloc(&ro); if (ro.ro_rt == NULL) { error = EHOSTUNREACH; goto nfsmout; } ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr); sprintf(uaddr, "%s.12.48", ipsrc); scid.cb_univaddr = uaddr; scid.cb_univaddrlen = strlen(uaddr); RTFREE(ro.ro_rt); try_again: sprintf(name, "%s-%d", ipsrc, seq++); scid.namelen = strlen(name); scid.name = name; nfs_v4initcompound(&cp); mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1)); mb = mreq; bpos = mtod(mb, caddr_t); nfsm_v4build_compound(&cp, "nfs4_do_setclientid()"); nfsm_v4build_setclientid(&cp, &scid); nfsm_v4build_finalize(&cp); nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred); if (error != 0) goto nfsmout; nfsm_v4dissect_compound(&cp); nfsm_v4dissect_setclientid(&cp, &scid); nmp->nm_clientid = scid.clientid; error = nfs_v4postop(&cp, error); /* Confirm */ m_freem(mrep); mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1)); mb = mreq; bpos = mtod(mb, caddr_t); nfs_v4initcompound(&cp); nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)"); nfsm_v4build_setclientid_confirm(&cp, &scid); nfsm_v4build_finalize(&cp); nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred); if (error != 0) goto nfsmout; nfsm_v4dissect_compound(&cp); nfsm_v4dissect_setclientid_confirm(&cp); nfsmout: error = nfs_v4postop(&cp, error); if (mrep) m_freem(mrep); if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES)) goto try_again; return (error); }