/* * 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_serv.c 8.8 (Berkeley) 7/31/95 * $FreeBSD: src/sys/nfs/nfs_serv.c,v 1.93.2.6 2002/12/29 18:19:53 dillon Exp $ */ /* * nfs version 2 and 3 server calls to vnode ops * - these routines generally have 3 phases * 1 - break down and validate rpc request in mbuf list * 2 - do the vnode ops for the request * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) * 3 - build the rpc reply in an mbuf list * nb: * - do not mix the phases, since the nfsm_?? macros can return failures * on a bad rpc or similar and do not do any vrele() or vput()'s * * - the nfsm_reply() macro generates an nfs rpc reply with the nfs * error number iff error != 0 whereas * returning an error from the server function implies a fatal error * such as a badly constructed rpc request that should be dropped without * a reply. * For Version 3, nfsm_reply() does not return for the error case, since * most version 3 rpcs return more than the status for error cases. * * Other notes: * Warning: always pay careful attention to resource cleanup on return * and note that nfsm_*() macros can terminate a procedure on certain * errors. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nfsproto.h" #include "rpcv2.h" #include "nfs.h" #include "xdr_subs.h" #include "nfsm_subs.h" #ifdef NFSRV_DEBUG #define nfsdbprintf(info) kprintf info #else #define nfsdbprintf(info) #endif #define MAX_REORDERED_RPC (16) #define MAX_COMMIT_COUNT (1024 * 1024) #define NUM_HEURISTIC 1031 #define NHUSE_INIT 64 #define NHUSE_INC 16 #define NHUSE_MAX 2048 static struct nfsheur { struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ off_t nh_nextoff; /* next offset for sequential detection */ int nh_use; /* use count for selection */ int nh_seqcount; /* heuristic */ } nfsheur[NUM_HEURISTIC]; nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON }; #ifndef NFS_NOSERVER nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, NFCHR, NFNON }; int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; int nfsrvw_procrastinate_v3 = 0; static struct timespec nfsver; SYSCTL_DECL(_vfs_nfs); int nfs_async; SYSCTL_INT(_vfs_nfs, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, "Enable unstable and fast writes"); static int nfs_commit_blks; static int nfs_commit_miss; SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 0, "Number of committed blocks"); SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 0, "Number of nfs blocks committed from dirty buffers"); static int nfsrv_access (struct mount *, struct vnode *, int, struct ucred *, int, struct thread *, int); static void nfsrvw_coalesce (struct nfsrv_descript *, struct nfsrv_descript *); /* * Heuristic to detect sequential operation. */ static struct nfsheur * nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp, int writeop) { struct nfsheur *nh; int hi, try; /* Locate best candidate */ try = 32; hi = ((int)(vm_offset_t) vp / sizeof(struct vnode)) % NUM_HEURISTIC; nh = &nfsheur[hi]; while (try--) { if (nfsheur[hi].nh_vp == vp) { nh = &nfsheur[hi]; break; } if (nfsheur[hi].nh_use > 0) --nfsheur[hi].nh_use; hi = (hi + 1) % NUM_HEURISTIC; if (nfsheur[hi].nh_use < nh->nh_use) nh = &nfsheur[hi]; } /* Initialize hint if this is a new file */ if (nh->nh_vp != vp) { nh->nh_vp = vp; nh->nh_nextoff = uio->uio_offset; nh->nh_use = NHUSE_INIT; if (uio->uio_offset == 0) nh->nh_seqcount = 4; else nh->nh_seqcount = 1; } /* * Calculate heuristic * * See vfs_vnops.c:sequential_heuristic(). */ if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || uio->uio_offset == nh->nh_nextoff) { nh->nh_seqcount += howmany(uio->uio_resid, 16384); if (nh->nh_seqcount > IO_SEQMAX) nh->nh_seqcount = IO_SEQMAX; } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { /* Probably a reordered RPC, leave seqcount alone. */ } else if (nh->nh_seqcount > 1) { nh->nh_seqcount /= 2; } else { nh->nh_seqcount = 0; } nh->nh_use += NHUSE_INC; if (nh->nh_use > NHUSE_MAX) nh->nh_use = NHUSE_MAX; return (nh); } /* * nfs v3 access service */ int nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vnode *vp = NULL; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; int error = 0, rdonly, getret; struct vattr vattr, *vap = &vattr; u_long testmode, nfsmode; struct nfsm_info info; u_int32_t *tl; info.dpos = nfsd->nd_dpos; info.md = nfsd->nd_md; info.mrep = nfsd->nd_mrep; info.mreq = NULL; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, 1, NULL); error = 0; goto nfsmout; } nfsmode = fxdr_unsigned(u_int32_t, *tl); if ((nfsmode & NFSV3ACCESS_READ) && nfsrv_access(mp, vp, VREAD, cred, rdonly, td, 0)) nfsmode &= ~NFSV3ACCESS_READ; if (vp->v_type == VDIR) testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | NFSV3ACCESS_DELETE); else testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); if ((nfsmode & testmode) && nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 0)) nfsmode &= ~testmode; if (vp->v_type == VDIR) testmode = NFSV3ACCESS_LOOKUP; else testmode = NFSV3ACCESS_EXECUTE; if ((nfsmode & testmode) && nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0)) nfsmode &= ~testmode; getret = VOP_GETATTR(vp, vap); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(1) + NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, vap); tl = nfsm_build(&info, NFSX_UNSIGNED); *tl = txdr_unsigned(nfsmode); nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs getattr service */ int nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nfs_fattr *fp; struct vattr va; struct vattr *vap = &va; struct vnode *vp = NULL; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; int error = 0, rdonly; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.mreq = NULL; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); error = 0; goto nfsmout; } error = VOP_GETATTR(vp, vap); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3), &error)); if (error) { error = 0; goto nfsmout; } fp = nfsm_build(&info, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); nfsm_srvfattr(nfsd, vap, fp); /* fall through */ nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs setattr service */ int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vattr va, preat; struct vattr *vap = &va; struct nfsv2_sattr *sp; struct nfs_fattr *fp; struct vnode *vp = NULL; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; u_int32_t *tl; int error = 0, rdonly, preat_ret = 1, postat_ret = 1; int gcheck = 0; struct timespec guard; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); guard.tv_sec = 0; /* fix compiler warning */ guard.tv_nsec = 0; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); VATTR_NULL(vap); if (info.v3) { ERROROUT(nfsm_srvsattr(&info, vap)); NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); gcheck = fxdr_unsigned(int, *tl); if (gcheck) { NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); fxdr_nfsv3time(tl, &guard); } } else { NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); /* * Nah nah nah nah na nah * There is a bug in the Sun client that puts 0xffff in the mode * field of sattr when it should put in 0xffffffff. The u_short * doesn't sign extend. * --> check the low order 2 bytes for 0xffff */ if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) vap->va_mode = nfstov_mode(sp->sa_mode); if (sp->sa_uid != nfs_xdrneg1) vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); if (sp->sa_gid != nfs_xdrneg1) vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); if (sp->sa_size != nfs_xdrneg1) vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size); if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { #ifdef notyet fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime); #else vap->va_atime.tv_sec = fxdr_unsigned(int32_t, sp->sa_atime.nfsv2_sec); vap->va_atime.tv_nsec = 0; #endif } if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime); } /* * Now that we have all the fields, lets do it. */ error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, postat_ret, vap); error = 0; goto nfsmout; } /* * vp now an active resource, pay careful attention to cleanup */ if (info.v3) { error = preat_ret = VOP_GETATTR(vp, &preat); if (!error && gcheck && (preat.va_ctime.tv_sec != guard.tv_sec || preat.va_ctime.tv_nsec != guard.tv_nsec)) error = NFSERR_NOT_SYNC; if (error) { vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, postat_ret, vap); error = 0; goto nfsmout; } } /* * If the size is being changed write acces is required, otherwise * just check for a read only file system. */ if (vap->va_size == ((u_quad_t)((quad_t) -1))) { if (rdonly || (mp->mnt_flag & MNT_RDONLY)) { error = EROFS; goto out; } } else { if (vp->v_type == VDIR) { error = EISDIR; goto out; } else if ((error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 0)) != 0){ goto out; } } error = VOP_SETATTR(vp, vap, cred); postat_ret = VOP_GETATTR(vp, vap); if (!error) error = postat_ret; out: vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCORFATTR(info.v3), &error)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, postat_ret, vap); error = 0; goto nfsmout; } fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, vap, fp); /* fall through */ nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs lookup rpc */ int nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nfs_fattr *fp; struct nlookupdata nd; struct vnode *vp; struct vnode *dirp; struct nchandle nch; nfsfh_t nfh; fhandle_t *fhp; int error = 0, len, dirattr_ret = 1; int pubflag; struct vattr va, dirattr, *vap = &va; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; vp = NULL; fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); pubflag = nfs_ispublicfh(fhp); error = nfs_namei(&nd, cred, 0, NULL, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), pubflag); /* * namei failure, only dirp to cleanup. Clear out garbarge from * structure in case macros jump to nfsmout. */ if (error) { if (dirp) { if (info.v3) dirattr_ret = VOP_GETATTR(dirp, &dirattr); vrele(dirp); dirp = NULL; } NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); error = 0; goto nfsmout; } /* * Locate index file for public filehandle * * error is 0 on entry and 0 on exit from this block. */ if (pubflag) { if (vp->v_type == VDIR && nfs_pub.np_index != NULL) { /* * Setup call to lookup() to see if we can find * the index file. Arguably, this doesn't belong * in a kernel.. Ugh. If an error occurs, do not * try to install an index file and then clear the * error. * * When we replace nd with ind and redirect ndp, * maintenance of ni_startdir and ni_vp shift to * ind and we have to clean them up in the old nd. * However, the cnd resource continues to be maintained * via the original nd. Confused? You aren't alone! */ vn_unlock(vp); cache_copy(&nd.nl_nch, &nch); nlookup_done(&nd); error = nlookup_init_raw(&nd, nfs_pub.np_index, UIO_SYSSPACE, 0, cred, &nch); cache_drop(&nch); if (error == 0) error = nlookup(&nd); if (error == 0) { /* * Found an index file. Get rid of * the old references. transfer vp and * load up the new vp. Fortunately we do * not have to deal with dvp, that would be * a huge mess. */ if (dirp) vrele(dirp); dirp = vp; vp = NULL; error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp); KKASSERT(error == 0); } error = 0; } /* * If the public filehandle was used, check that this lookup * didn't result in a filehandle outside the publicly exported * filesystem. We clear the poor vp here to avoid lockups due * to NFS I/O. */ if (vp->v_mount != nfs_pub.np_mount) { vput(vp); vp = NULL; error = EPERM; } } if (dirp) { if (info.v3) dirattr_ret = VOP_GETATTR(dirp, &dirattr); vrele(dirp); dirp = NULL; } /* * Resources at this point: * ndp->ni_vp may not be NULL * */ if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); error = 0; goto nfsmout; } /* * Clear out some resources prior to potentially blocking. This * is not as critical as ni_dvp resources in other routines, but * it helps. */ nlookup_done(&nd); /* * Get underlying attribute, then release remaining resources ( for * the same potential blocking reason ) and reply. */ bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); error = VFS_VPTOFH(vp, &fhp->fh_fid); if (!error) error = VOP_GETATTR(vp, vap); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_SRVFH(info.v3) + NFSX_POSTOPORFATTR(info.v3) + NFSX_POSTOPATTR(info.v3), &error)); if (error) { nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); error = 0; goto nfsmout; } nfsm_srvfhtom(&info, fhp); if (info.v3) { nfsm_srvpostop_attr(&info, nfsd, 0, vap); nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); } else { fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, vap, fp); } nfsmout: *mrq = info.mreq; if (dirp) vrele(dirp); nlookup_done(&nd); /* may be called twice */ if (vp) vput(vp); return (error); } /* * nfs readlink service */ int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; struct iovec *ivp = iv; u_int32_t *tl; int error = 0, rdonly, i, tlen, len, getret; struct mbuf *mp1, *mp2, *mp3; struct vnode *vp = NULL; struct mount *mp = NULL; struct vattr attr; nfsfh_t nfh; fhandle_t *fhp; struct uio io, *uiop = &io; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); bzero(&io, sizeof(struct uio)); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); #ifndef nolint mp2 = NULL; #endif mp3 = NULL; fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); len = 0; i = 0; while (len < NFS_MAXPATHLEN) { mp1 = m_getcl(M_WAITOK, MT_DATA, 0); mp1->m_len = MCLBYTES; if (len == 0) mp3 = mp2 = mp1; else { mp2->m_next = mp1; mp2 = mp1; } if ((len + mp1->m_len) > NFS_MAXPATHLEN) { mp1->m_len = NFS_MAXPATHLEN-len; len = NFS_MAXPATHLEN; } else len += mp1->m_len; ivp->iov_base = mtod(mp1, caddr_t); ivp->iov_len = mp1->m_len; i++; ivp++; } uiop->uio_iov = iv; uiop->uio_iovcnt = i; uiop->uio_offset = 0; uiop->uio_resid = len; uiop->uio_rw = UIO_READ; uiop->uio_segflg = UIO_SYSSPACE; uiop->uio_td = NULL; error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, 1, NULL); error = 0; goto nfsmout; } if (vp->v_type != VLNK) { if (info.v3) error = EINVAL; else error = ENXIO; goto out; } error = VOP_READLINK(vp, uiop, cred); out: getret = VOP_GETATTR(vp, &attr); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_UNSIGNED, &error)); if (info.v3) { nfsm_srvpostop_attr(&info, nfsd, getret, &attr); if (error) { error = 0; goto nfsmout; } } if (uiop->uio_resid > 0) { len -= uiop->uio_resid; tlen = nfsm_rndup(len); nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); } tl = nfsm_build(&info, NFSX_UNSIGNED); *tl = txdr_unsigned(len); info.mb->m_next = mp3; mp3 = NULL; nfsmout: *mrq = info.mreq; if (mp3) m_freem(mp3); if (vp) vput(vp); return(error); } /* * nfs read service */ int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct nfsm_info info; struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct iovec *iv; struct iovec *iv2; struct mbuf *m; struct nfs_fattr *fp; u_int32_t *tl; int i; int reqlen; int error = 0, rdonly, cnt, len, left, siz, tlen, getret; struct mbuf *m2; struct vnode *vp = NULL; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; struct uio io, *uiop = &io; struct vattr va, *vap = &va; struct nfsheur *nh; off_t off; int ioflag = 0; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); if (info.v3) { NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); off = fxdr_hyper(tl); } else { NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); off = (off_t)fxdr_unsigned(u_int32_t, *tl); } NEGREPLYOUT(reqlen = nfsm_srvstrsiz(&info, NFS_SRVMAXDATA(nfsd), &error)); /* * Reference vp. If an error occurs, vp will be invalid, but we * have to NULL it just in case. The macros might goto nfsmout * as well. */ error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, 1, NULL); error = 0; goto nfsmout; } if (vp->v_type != VREG) { if (info.v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } if (!error) { if ((error = nfsrv_access(mp, vp, VREAD, cred, rdonly, td, 1)) != 0) error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 1); } getret = VOP_GETATTR(vp, vap); if (!error) error = getret; if (error) { vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, getret, vap); error = 0; goto nfsmout; } /* * Calculate byte count to read */ if (off >= vap->va_size) cnt = 0; else if ((off + reqlen) > vap->va_size) cnt = vap->va_size - off; else cnt = reqlen; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPORFATTR(info.v3) + 3 * NFSX_UNSIGNED + nfsm_rndup(cnt), &error)); if (info.v3) { tl = nfsm_build(&info, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); *tl++ = nfs_true; fp = (struct nfs_fattr *)tl; tl += (NFSX_V3FATTR / sizeof (u_int32_t)); } else { tl = nfsm_build(&info, NFSX_V2FATTR + NFSX_UNSIGNED); fp = (struct nfs_fattr *)tl; tl += (NFSX_V2FATTR / sizeof (u_int32_t)); } len = left = nfsm_rndup(cnt); if (cnt > 0) { /* * Generate the mbuf list with the uio_iov ref. to it. */ i = 0; m = m2 = info.mb; while (left > 0) { siz = min(M_TRAILINGSPACE(m), left); if (siz > 0) { left -= siz; i++; } if (left > 0) { m = m_getcl(M_WAITOK, MT_DATA, 0); m->m_len = 0; m2->m_next = m; m2 = m; } } iv = kmalloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = iv2 = iv; m = info.mb; left = len; i = 0; while (left > 0) { if (m == NULL) panic("nfsrv_read iov"); siz = min(M_TRAILINGSPACE(m), left); if (siz > 0) { iv->iov_base = mtod(m, caddr_t) + m->m_len; iv->iov_len = siz; m->m_len += siz; left -= siz; iv++; i++; } m = m->m_next; } uiop->uio_iovcnt = i; uiop->uio_offset = off; uiop->uio_resid = len; uiop->uio_rw = UIO_READ; uiop->uio_segflg = UIO_SYSSPACE; nh = nfsrv_sequential_heuristic(uiop, vp, 0); ioflag |= nh->nh_seqcount << IO_SEQSHIFT; error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); if (error == 0) { off = uiop->uio_offset; nh->nh_nextoff = off; } kfree((caddr_t)iv2, M_TEMP); if (error || (getret = VOP_GETATTR(vp, vap))) { if (!error) error = getret; m_freem(info.mreq); info.mreq = NULL; vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, getret, vap); error = 0; goto nfsmout; } } else { uiop->uio_resid = 0; } vput(vp); vp = NULL; nfsm_srvfattr(nfsd, vap, fp); tlen = len - uiop->uio_resid; cnt = cnt < tlen ? cnt : tlen; tlen = nfsm_rndup(cnt); if (len != tlen || tlen != cnt) nfsm_adj(info.mb, len - tlen, tlen - cnt); if (info.v3) { *tl++ = txdr_unsigned(cnt); if (cnt < reqlen) *tl++ = nfs_true; else *tl++ = nfs_false; } *tl = txdr_unsigned(cnt); nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs write service */ int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct iovec *ivp; int i, cnt; struct mbuf *mp1; struct nfs_fattr *fp; struct iovec *iv; struct vattr va, forat; struct vattr *vap = &va; u_int32_t *tl; int error = 0, rdonly, len, forat_ret = 1; int ioflags, aftat_ret = 1, retlen, zeroing, adjust; int stable = NFSV3WRITE_FILESYNC; struct vnode *vp = NULL; struct mount *mp = NULL; struct nfsheur *nh; nfsfh_t nfh; fhandle_t *fhp; struct uio io, *uiop = &io; struct nfsm_info info; off_t off; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); if (info.mrep == NULL) { error = 0; goto nfsmout; } fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); if (info.v3) { NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); off = fxdr_hyper(tl); tl += 3; stable = fxdr_unsigned(int, *tl++); } else { NULLOUT(tl = nfsm_dissect(&info, 4 * NFSX_UNSIGNED)); off = (off_t)fxdr_unsigned(u_int32_t, *++tl); tl += 2; if (nfs_async) stable = NFSV3WRITE_UNSTABLE; } retlen = len = fxdr_unsigned(int32_t, *tl); cnt = i = 0; /* * For NFS Version 2, it is not obvious what a write of zero length * should do, but I might as well be consistent with Version 3, * which is to return ok so long as there are no permission problems. */ if (len > 0) { zeroing = 1; mp1 = info.mrep; while (mp1) { if (mp1 == info.md) { zeroing = 0; adjust = info.dpos - mtod(mp1, caddr_t); mp1->m_len -= adjust; if (mp1->m_len > 0 && adjust > 0) mp1->m_data += adjust; } if (zeroing) mp1->m_len = 0; else if (mp1->m_len > 0) { i += mp1->m_len; if (i > len) { mp1->m_len -= (i - len); zeroing = 1; } if (mp1->m_len > 0) cnt++; } mp1 = mp1->m_next; } } if (len > NFS_MAXDATA || len < 0 || i < len) { error = EIO; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, vap); error = 0; goto nfsmout; } error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, vap); error = 0; goto nfsmout; } if (info.v3) forat_ret = VOP_GETATTR(vp, &forat); if (vp->v_type != VREG) { if (info.v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } if (!error) { error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 1); } if (error) { vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, vap); error = 0; goto nfsmout; } if (len > 0) { ivp = kmalloc(cnt * sizeof(struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = iv = ivp; uiop->uio_iovcnt = cnt; mp1 = info.mrep; while (mp1) { if (mp1->m_len > 0) { ivp->iov_base = mtod(mp1, caddr_t); ivp->iov_len = mp1->m_len; ivp++; } mp1 = mp1->m_next; } /* * XXX * The IO_METASYNC flag indicates that all metadata (and not just * enough to ensure data integrity) mus be written to stable storage * synchronously. * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) */ if (stable == NFSV3WRITE_UNSTABLE) ioflags = IO_NODELOCKED; else if (stable == NFSV3WRITE_DATASYNC) ioflags = (IO_SYNC | IO_NODELOCKED); else ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); uiop->uio_resid = len; uiop->uio_rw = UIO_WRITE; uiop->uio_segflg = UIO_SYSSPACE; uiop->uio_td = NULL; uiop->uio_offset = off; nh = nfsrv_sequential_heuristic(uiop, vp, 1); ioflags |= nh->nh_seqcount << IO_SEQSHIFT; error = VOP_WRITE(vp, uiop, ioflags, cred); if (error == 0) nh->nh_nextoff = uiop->uio_offset; nfsstats.srvvop_writes++; kfree((caddr_t)iv, M_TEMP); } aftat_ret = VOP_GETATTR(vp, vap); vput(vp); vp = NULL; if (!error) error = aftat_ret; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_PREOPATTR(info.v3) + NFSX_POSTOPORFATTR(info.v3) + 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(info.v3), &error)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, vap); if (error) { error = 0; goto nfsmout; } tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(retlen); /* * If nfs_async is set, then pretend the write was FILESYNC. */ if (stable == NFSV3WRITE_UNSTABLE && !nfs_async) *tl++ = txdr_unsigned(stable); else *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); /* * Actually, there is no need to txdr these fields, * but it may make the values more human readable, * for debugging purposes. */ if (nfsver.tv_sec == 0) nfsver = boottime; *tl++ = txdr_unsigned(nfsver.tv_sec); *tl = txdr_unsigned(nfsver.tv_nsec / 1000); } else { fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, vap, fp); } nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * NFS write service with write gathering support. Called when * nfsrvw_procrastinate > 0. * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, * Jan. 1994. */ int nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct iovec *ivp; struct nfsrv_descript *wp, *nfsd, *owp, *swp; struct nfs_fattr *fp; int i; struct iovec *iov; struct nfsrvw_delayhash *wpp; struct ucred *cred; struct vattr va, forat; u_int32_t *tl; int error = 0, rdonly, len, forat_ret = 1; int ioflags, aftat_ret = 1, adjust, zeroing; struct mbuf *mp1; struct vnode *vp = NULL; struct mount *mp = NULL; struct uio io, *uiop = &io; u_quad_t cur_usec; struct nfsm_info info; info.mreq = NULL; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); #ifndef nolint i = 0; len = 0; #endif if (*ndp) { nfsd = *ndp; *ndp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); cred = &nfsd->nd_cr; LIST_INIT(&nfsd->nd_coalesce); nfsd->nd_mreq = NULL; nfsd->nd_stable = NFSV3WRITE_FILESYNC; cur_usec = nfs_curusec(); nfsd->nd_time = cur_usec + (info.v3 ? nfsrvw_procrastinate_v3 : nfsrvw_procrastinate); /* * Now, get the write header.. */ NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, &nfsd->nd_fh, &error)); if (info.v3) { NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); nfsd->nd_off = fxdr_hyper(tl); tl += 3; nfsd->nd_stable = fxdr_unsigned(int, *tl++); } else { NULLOUT(tl = nfsm_dissect(&info, 4 * NFSX_UNSIGNED)); nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); tl += 2; if (nfs_async) nfsd->nd_stable = NFSV3WRITE_UNSTABLE; } len = fxdr_unsigned(int32_t, *tl); nfsd->nd_len = len; nfsd->nd_eoff = nfsd->nd_off + len; /* * Trim the header out of the mbuf list and trim off any trailing * junk so that the mbuf list has only the write data. */ zeroing = 1; i = 0; mp1 = info.mrep; while (mp1) { if (mp1 == info.md) { zeroing = 0; adjust = info.dpos - mtod(mp1, caddr_t); mp1->m_len -= adjust; if (mp1->m_len > 0 && adjust > 0) mp1->m_data += adjust; } if (zeroing) mp1->m_len = 0; else { i += mp1->m_len; if (i > len) { mp1->m_len -= (i - len); zeroing = 1; } } mp1 = mp1->m_next; } if (len > NFS_MAXDATA || len < 0 || i < len) { nfsmout: m_freem(info.mrep); info.mrep = NULL; error = EIO; nfsm_writereply(&info, nfsd, slp, error, 2 * NFSX_UNSIGNED); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, &va); } nfsd->nd_mreq = info.mreq; nfsd->nd_mrep = NULL; nfsd->nd_time = 0; } /* * Add this entry to the hash and time queues. */ owp = NULL; wp = slp->ns_tq.lh_first; while (wp && wp->nd_time < nfsd->nd_time) { owp = wp; wp = wp->nd_tq.le_next; } NFS_DPF(WG, ("Q%03x", nfsd->nd_retxid & 0xfff)); if (owp) { LIST_INSERT_AFTER(owp, nfsd, nd_tq); } else { LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); } if (nfsd->nd_mrep) { wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); owp = NULL; wp = wpp->lh_first; while (wp && bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { owp = wp; wp = wp->nd_hash.le_next; } while (wp && wp->nd_off < nfsd->nd_off && !bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { owp = wp; wp = wp->nd_hash.le_next; } if (owp) { LIST_INSERT_AFTER(owp, nfsd, nd_hash); /* * Search the hash list for overlapping entries and * coalesce. */ for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { wp = nfsd->nd_hash.le_next; if (NFSW_SAMECRED(owp, nfsd)) nfsrvw_coalesce(owp, nfsd); } } else { LIST_INSERT_HEAD(wpp, nfsd, nd_hash); } } } /* * Now, do VOP_WRITE()s for any one(s) that need to be done now * and generate the associated reply mbuf list(s). */ loop1: cur_usec = nfs_curusec(); for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { owp = nfsd->nd_tq.le_next; if (nfsd->nd_time > cur_usec) break; if (nfsd->nd_mreq) continue; NFS_DPF(WG, ("P%03x", nfsd->nd_retxid & 0xfff)); LIST_REMOVE(nfsd, nd_tq); LIST_REMOVE(nfsd, nd_hash); info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsd->nd_mrep = NULL; cred = &nfsd->nd_cr; forat_ret = aftat_ret = 1; error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &mp, &vp, cred, slp, nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (!error) { if (info.v3) forat_ret = VOP_GETATTR(vp, &forat); if (vp->v_type != VREG) { if (info.v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } } else { vp = NULL; } if (!error) { error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 1); } if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) ioflags = IO_NODELOCKED; else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) ioflags = (IO_SYNC | IO_NODELOCKED); else ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); uiop->uio_rw = UIO_WRITE; uiop->uio_segflg = UIO_SYSSPACE; uiop->uio_td = NULL; uiop->uio_offset = nfsd->nd_off; uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; if (uiop->uio_resid > 0) { mp1 = info.mrep; i = 0; while (mp1) { if (mp1->m_len > 0) i++; mp1 = mp1->m_next; } uiop->uio_iovcnt = i; iov = kmalloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = ivp = iov; mp1 = info.mrep; while (mp1) { if (mp1->m_len > 0) { ivp->iov_base = mtod(mp1, caddr_t); ivp->iov_len = mp1->m_len; ivp++; } mp1 = mp1->m_next; } if (!error) { error = VOP_WRITE(vp, uiop, ioflags, cred); nfsstats.srvvop_writes++; } kfree((caddr_t)iov, M_TEMP); } m_freem(info.mrep); info.mrep = NULL; if (vp) { aftat_ret = VOP_GETATTR(vp, &va); vput(vp); vp = NULL; } /* * Loop around generating replies for all write rpcs that have * now been completed. */ swp = nfsd; do { NFS_DPF(WG, ("R%03x", nfsd->nd_retxid & 0xfff)); if (error) { nfsm_writereply(&info, nfsd, slp, error, NFSX_WCCDATA(info.v3)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, &va); } } else { nfsm_writereply(&info, nfsd, slp, error, NFSX_PREOPATTR(info.v3) + NFSX_POSTOPORFATTR(info.v3) + 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(info.v3)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, aftat_ret, &va); tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(nfsd->nd_len); *tl++ = txdr_unsigned(swp->nd_stable); /* * Actually, there is no need to txdr these fields, * but it may make the values more human readable, * for debugging purposes. */ if (nfsver.tv_sec == 0) nfsver = boottime; *tl++ = txdr_unsigned(nfsver.tv_sec); *tl = txdr_unsigned(nfsver.tv_nsec / 1000); } else { fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, &va, fp); } } nfsd->nd_mreq = info.mreq; if (nfsd->nd_mrep) panic("nfsrv_write: nd_mrep not free"); /* * Done. Put it at the head of the timer queue so that * the final phase can return the reply. */ if (nfsd != swp) { nfsd->nd_time = 0; LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); } nfsd = swp->nd_coalesce.lh_first; if (nfsd) { LIST_REMOVE(nfsd, nd_tq); } } while (nfsd); swp->nd_time = 0; LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); goto loop1; } /* * Search for a reply to return. */ for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) { if (nfsd->nd_mreq) { NFS_DPF(WG, ("X%03x", nfsd->nd_retxid & 0xfff)); LIST_REMOVE(nfsd, nd_tq); break; } } if (nfsd) { *ndp = nfsd; *mrq = nfsd->nd_mreq; } else { *ndp = NULL; *mrq = NULL; } return (0); } /* * Coalesce the write request nfsd into owp. To do this we must: * - remove nfsd from the queues * - merge nfsd->nd_mrep into owp->nd_mrep * - update the nd_eoff and nd_stable for owp * - put nfsd on owp's nd_coalesce list * NB: Must be called at splsoftclock(). */ static void nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) { int overlap; struct mbuf *mp1; struct nfsrv_descript *p; NFS_DPF(WG, ("C%03x-%03x", nfsd->nd_retxid & 0xfff, owp->nd_retxid & 0xfff)); LIST_REMOVE(nfsd, nd_hash); LIST_REMOVE(nfsd, nd_tq); if (owp->nd_eoff < nfsd->nd_eoff) { overlap = owp->nd_eoff - nfsd->nd_off; if (overlap < 0) panic("nfsrv_coalesce: bad off"); if (overlap > 0) m_adj(nfsd->nd_mrep, overlap); mp1 = owp->nd_mrep; while (mp1->m_next) mp1 = mp1->m_next; mp1->m_next = nfsd->nd_mrep; owp->nd_eoff = nfsd->nd_eoff; } else m_freem(nfsd->nd_mrep); nfsd->nd_mrep = NULL; if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) owp->nd_stable = NFSV3WRITE_FILESYNC; else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && owp->nd_stable == NFSV3WRITE_UNSTABLE) owp->nd_stable = NFSV3WRITE_DATASYNC; LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); /* * If nfsd had anything else coalesced into it, transfer them * to owp, otherwise their replies will never get sent. */ for (p = nfsd->nd_coalesce.lh_first; p; p = nfsd->nd_coalesce.lh_first) { LIST_REMOVE(p, nd_tq); LIST_INSERT_HEAD(&owp->nd_coalesce, p, nd_tq); } } /* * nfs create service * now does a truncate to 0 length via. setattr if it already exists */ int nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nfs_fattr *fp; struct vattr va, dirfor, diraft; struct vattr *vap = &va; struct nfsv2_sattr *sp; u_int32_t *tl; struct nlookupdata nd; int error = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; dev_t rdev = NOUDEV; caddr_t cp; int how, exclusive_flag = 0; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; u_quad_t tempsize; u_char cverf[NFSX_V3CREATEVERF]; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); /* * Call namei and do initial cleanup to get a few things * out of the way. If we get an initial error we cleanup * and return here to avoid special-casing the invalid nd * structure through the rest of the case. dirp may be * set even if an error occurs, but the nd structure will not * be valid at all if an error occurs so we have to invalidate it * prior to calling nfsm_reply ( which might goto nfsmout ). */ error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); mp = vfs_getvfs(&fhp->fh_fsid); if (dirp) { if (info.v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor); } else { vrele(dirp); dirp = NULL; } } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; goto nfsmout; } /* * No error. Continue. State: * * dirp may be valid * vp may be valid or NULL if the target does not * exist. * dvp is valid * * The error state is set through the code and we may also do some * opportunistic releasing of vnodes to avoid holding locks through * NFS I/O. The cleanup at the end is a catch-all */ VATTR_NULL(vap); if (info.v3) { NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); how = fxdr_unsigned(int, *tl); switch (how) { case NFSV3CREATE_GUARDED: if (vp) { error = EEXIST; break; } /* fall through */ case NFSV3CREATE_UNCHECKED: ERROROUT(nfsm_srvsattr(&info, vap)); break; case NFSV3CREATE_EXCLUSIVE: NULLOUT(cp = nfsm_dissect(&info, NFSX_V3CREATEVERF)); bcopy(cp, cverf, NFSX_V3CREATEVERF); exclusive_flag = 1; break; } vap->va_type = VREG; } else { NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); vap->va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); if (vap->va_type == VNON) vap->va_type = VREG; vap->va_mode = nfstov_mode(sp->sa_mode); switch (vap->va_type) { case VREG: tsize = fxdr_unsigned(int32_t, sp->sa_size); if (tsize != -1) vap->va_size = (u_quad_t)tsize; break; case VCHR: case VBLK: case VFIFO: rdev = fxdr_unsigned(long, sp->sa_size); break; default: break; } } /* * Iff doesn't exist, create it * otherwise just truncate to 0 length * should I set the mode too ? * * The only possible error we can have at this point is EEXIST. * nd.ni_vp will also be non-NULL in that case. */ if (vp == NULL) { if (vap->va_mode == (mode_t)VNOVAL) vap->va_mode = 0; if (vap->va_type == VREG || vap->va_type == VSOCK) { vn_unlock(dvp); error = VOP_NCREATE(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); vrele(dvp); dvp = NULL; if (error == 0) { if (exclusive_flag) { exclusive_flag = 0; VATTR_NULL(vap); bcopy(cverf, (caddr_t)&vap->va_atime, NFSX_V3CREATEVERF); error = VOP_SETATTR(vp, vap, cred); } } } else if ( vap->va_type == VCHR || vap->va_type == VBLK || vap->va_type == VFIFO ) { /* * Handle SysV FIFO node special cases. All other * devices require super user to access. */ if (vap->va_type == VCHR && rdev == 0xffffffff) vap->va_type = VFIFO; if (vap->va_type != VFIFO && (error = caps_priv_check(cred, SYSCAP_RESTRICTEDROOT))) { goto nfsmreply0; } vap->va_rmajor = umajor(rdev); vap->va_rminor = uminor(rdev); vn_unlock(dvp); error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); vrele(dvp); dvp = NULL; if (error) goto nfsmreply0; #if 0 /* * XXX what is this junk supposed to do ? */ vput(vp); vp = NULL; /* * release dvp prior to lookup */ vput(dvp); dvp = NULL; /* * Setup for lookup. * * Even though LOCKPARENT was cleared, ni_dvp may * be garbage. */ nd.ni_cnd.cn_nameiop = NAMEI_LOOKUP; nd.ni_cnd.cn_flags &= ~(CNP_LOCKPARENT); nd.ni_cnd.cn_td = td; nd.ni_cnd.cn_cred = cred; error = lookup(&nd); nd.ni_dvp = NULL; if (error != 0) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); /* fall through on certain errors */ } nfsrv_object_create(nd.ni_vp); if (nd.ni_cnd.cn_flags & CNP_ISSYMLINK) { error = EINVAL; goto nfsmreply0; } #endif } else { error = ENXIO; } } else { if (vap->va_size != -1) { error = nfsrv_access(mp, vp, VWRITE, cred, (nd.nl_flags & NLC_NFS_RDONLY), td, 0); if (!error) { tempsize = vap->va_size; VATTR_NULL(vap); vap->va_size = tempsize; error = VOP_SETATTR(vp, vap, cred); } } } if (!error) { bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); error = VFS_VPTOFH(vp, &fhp->fh_fid); if (!error) error = VOP_GETATTR(vp, vap); } if (info.v3) { if (exclusive_flag && !error && bcmp(cverf, (caddr_t)&vap->va_atime, NFSX_V3CREATEVERF)) error = EEXIST; diraft_ret = VOP_GETATTR(dirp, &diraft); vrele(dirp); dirp = NULL; } NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_SRVFH(info.v3) + NFSX_FATTR(info.v3) + NFSX_WCCDATA(info.v3), &error)); if (info.v3) { if (!error) { nfsm_srvpostop_fh(&info, fhp); nfsm_srvpostop_attr(&info, nfsd, 0, vap); } nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; } else { nfsm_srvfhtom(&info, fhp); fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, vap, fp); } goto nfsmout; nfsmreply0: NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); error = 0; /* fall through */ nfsmout: *mrq = info.mreq; if (dirp) vrele(dirp); nlookup_done(&nd); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) vput(vp); if (mp) mount_drop(mp); return (error); } /* * nfs v3 mknod service */ int nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vattr va, dirfor, diraft; struct vattr *vap = &va; u_int32_t *tl; struct nlookupdata nd; int error = 0, len, dirfor_ret = 1, diraft_ret = 1; enum vtype vtyp; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; nfsfh_t nfh; fhandle_t *fhp; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); /* * Handle nfs_namei() call. If an error occurs, the nd structure * is not valid. However, nfsm_*() routines may still jump to * nfsmout. */ error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) dirfor_ret = VOP_GETATTR(dirp, &dirfor); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(1), &error)); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; goto nfsmout; } NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); vtyp = nfsv3tov_type(*tl); if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { error = NFSERR_BADTYPE; goto out; } VATTR_NULL(vap); ERROROUT(nfsm_srvsattr(&info, vap)); if (vtyp == VCHR || vtyp == VBLK) { NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); vap->va_rmajor = fxdr_unsigned(u_int32_t, *tl++); vap->va_rminor = fxdr_unsigned(u_int32_t, *tl); } /* * Iff doesn't exist, create it. */ if (vp) { error = EEXIST; goto out; } vap->va_type = vtyp; if (vap->va_mode == (mode_t)VNOVAL) vap->va_mode = 0; if (vtyp == VSOCK) { vn_unlock(dvp); error = VOP_NCREATE(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); vrele(dvp); dvp = NULL; } else { if (vtyp != VFIFO && (error = caps_priv_check(cred, SYSCAP_RESTRICTEDROOT))) { goto out; } vn_unlock(dvp); error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); vrele(dvp); dvp = NULL; if (error) goto out; } /* * send response, cleanup, return. */ out: nlookup_done(&nd); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); dvp = NULL; } if (!error) { bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); error = VFS_VPTOFH(vp, &fhp->fh_fid); if (!error) error = VOP_GETATTR(vp, vap); } if (vp) { vput(vp); vp = NULL; } diraft_ret = VOP_GETATTR(dirp, &diraft); if (dirp) { vrele(dirp); dirp = NULL; } NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1), &error)); if (!error) { nfsm_srvpostop_fh(&info, fhp); nfsm_srvpostop_attr(&info, nfsd, 0, vap); } nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); *mrq = info.mreq; return (0); nfsmout: *mrq = info.mreq; if (dirp) vrele(dirp); nlookup_done(&nd); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) vput(vp); return (error); } /* * nfs remove service */ int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nlookupdata nd; int error = 0, len, dirfor_ret = 1, diraft_ret = 1; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; struct vattr dirfor, diraft; nfsfh_t nfh; fhandle_t *fhp; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); error = nfs_namei(&nd, cred, NLC_DELETE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) { if (info.v3) dirfor_ret = VOP_GETATTR(dirp, &dirfor); } if (error == 0) { if (vp->v_type == VDIR) { error = EPERM; /* POSIX */ goto out; } /* * The root of a mounted filesystem cannot be deleted. */ if (vp->v_flag & VROOT) { error = EBUSY; goto out; } out: if (!error) { if (dvp != vp) vn_unlock(dvp); if (vp) { vput(vp); vp = NULL; } error = VOP_NREMOVE(&nd.nl_nch, dvp, nd.nl_cred); vrele(dvp); dvp = NULL; } } if (dirp && info.v3) diraft_ret = VOP_GETATTR(dirp, &diraft); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; } nfsmout: *mrq = info.mreq; nlookup_done(&nd); if (dirp) vrele(dirp); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) vput(vp); return(error); } /* * nfs rename service */ int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; int error = 0, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; int tdirfor_ret = 1, tdiraft_ret = 1; struct nlookupdata fromnd, tond; struct nchandle fnchd; struct nchandle tnchd; struct vnode *fvp, *fdirp, *fdvp; struct vnode *tvp, *tdirp, *tdvp; struct namecache *ncp; struct vattr fdirfor, fdiraft, tdirfor, tdiraft; int fnchd_status = 0; int tnchd_status = 0; nfsfh_t fnfh, tnfh; fhandle_t *ffhp, *tfhp; uid_t saved_uid; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); #ifndef nolint fvp = NULL; #endif ffhp = &fnfh.fh_generic; tfhp = &tnfh.fh_generic; /* * Clear fields incase goto nfsmout occurs from macro. */ nlookup_zero(&fromnd); nlookup_zero(&tond); fdirp = NULL; tdirp = NULL; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, ffhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); /* * Remember our original uid so that we can reset cr_uid before * the second nfs_namei() call, in case it is remapped. * * NOTE! If nfs_namei() is called twice on the same nd, it assumes * a retry and does not try to reparse the path. */ saved_uid = cred->cr_uid; again: error = nfs_namei(&fromnd, cred, NLC_RENAME_SRC, NULL, NULL, ffhp, len, slp, nam, &info.md, &info.dpos, &fdirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (fdirp) { if (info.v3) fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor); } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); nfsm_srvwcc_data(&info, nfsd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); error = 0; goto nfsmout; } fnchd.mount = fromnd.nl_nch.mount; fnchd.ncp = fromnd.nl_nch.ncp->nc_parent; if (fnchd.ncp == NULL) { error = ENOENT; goto nfsmout; } cache_hold(&fnchd); fnchd_status = 1; /* * We have to unlock the from ncp before we can safely lookup * the target ncp. */ KKASSERT(fromnd.nl_flags & NLC_NCPISLOCKED); cache_unlock(&fromnd.nl_nch); fromnd.nl_flags &= ~NLC_NCPISLOCKED; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, tfhp, &error)); NEGATIVEOUT(len2 = nfsm_strsiz(&info, NFS_MAXNAMLEN)); cred->cr_uid = saved_uid; error = nfs_namei(&tond, cred, NLC_RENAME_DST, NULL, NULL, tfhp, len2, slp, nam, &info.md, &info.dpos, &tdirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (tdirp) { if (info.v3) tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor); } if (error) goto out1; tnchd.mount = tond.nl_nch.mount; tnchd.ncp = tond.nl_nch.ncp->nc_parent; if (tnchd.ncp == NULL) { error = ENOENT; goto nfsmout; } cache_hold(&tnchd); tnchd_status = 1; cache_lock4_tondlocked(&fnchd, &fromnd.nl_nch, &tnchd, &tond.nl_nch, fromnd.nl_cred, tond.nl_cred); fromnd.nl_flags |= NLC_NCPISLOCKED; fnchd_status = 2; tnchd_status = 2; /* * Revalidate namecache records and retry the lookups if necessary. */ if (fnchd.ncp != fromnd.nl_nch.ncp->nc_parent || tnchd.ncp != tond.nl_nch.ncp->nc_parent || (fromnd.nl_nch.ncp->nc_flag & (NCF_DESTROYED | NCF_UNRESOLVED)) || fromnd.nl_nch.ncp->nc_vp == NULL || (tond.nl_nch.ncp->nc_flag & (NCF_DESTROYED | NCF_UNRESOLVED))) { cache_put(&fnchd); cache_put(&tnchd); if (tdirp) vrele(tdirp); if (fdirp) vrele(fdirp); kprintf("nfs - retry rename %s to %s\n", fromnd.nl_path, tond.nl_path); goto again; } /* * Source and target vnodes (tvp might be NULL) */ fvp = fromnd.nl_nch.ncp->nc_vp; tvp = tond.nl_nch.ncp->nc_vp; /* * Set fdvp and tdvp. We haven't done all the topology checks * so these can wind up NULL (e.g. if either fvp or tvp is a mount * point). If we get through the checks these will be guarenteed * to be non-NULL. * * Holding the children ncp's should be sufficient to prevent * fdvp and tdvp ripouts. */ fdvp = fromnd.nl_nch.ncp->nc_parent->nc_vp; tdvp = tond.nl_nch.ncp->nc_parent->nc_vp; if (tvp != NULL) { if (fvp->v_type == VDIR && tvp->v_type != VDIR) { if (info.v3) error = EEXIST; else error = EISDIR; goto out; } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { if (info.v3) error = EEXIST; else error = ENOTDIR; goto out; } if (tvp->v_type == VDIR && (tond.nl_nch.ncp->nc_flag & NCF_ISMOUNTPT)) { if (info.v3) error = EXDEV; else error = ENOTEMPTY; goto out; } } if (fvp->v_type == VDIR && (fromnd.nl_nch.ncp->nc_flag & NCF_ISMOUNTPT)) { if (info.v3) error = EXDEV; else error = ENOTEMPTY; goto out; } if (fromnd.nl_nch.mount != tond.nl_nch.mount) { if (info.v3) error = EXDEV; else error = ENOTEMPTY; goto out; } if (fromnd.nl_nch.ncp == tond.nl_nch.ncp->nc_parent) { if (info.v3) error = EINVAL; else error = ENOTEMPTY; } /* * You cannot rename a source into itself or a subdirectory of itself. * We check this by travsering the target directory upwards looking * for a match against the source. */ if (error == 0) { for (ncp = tond.nl_nch.ncp; ncp; ncp = ncp->nc_parent) { if (fromnd.nl_nch.ncp == ncp) { error = EINVAL; break; } } } /* * If source is the same as the destination (that is the * same vnode with the same name in the same directory), * then there is nothing to do. */ if (fromnd.nl_nch.ncp == tond.nl_nch.ncp) error = -1; out: if (!error) { /* * The VOP_NRENAME function releases all vnode references & * locks prior to returning so we need to clear the pointers * to bypass cleanup code later on. */ error = VOP_NRENAME(&fromnd.nl_nch, &tond.nl_nch, fdvp, tdvp, tond.nl_cred); } else { if (error == -1) error = 0; } /* fall through */ out1: if (fdirp) fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft); if (tdirp) tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_WCCDATA(info.v3), &error)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); nfsm_srvwcc_data(&info, nfsd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); } error = 0; /* fall through */ nfsmout: if (fnchd_status > 1) cache_unlock(&fnchd); if (fnchd_status > 0) cache_drop(&fnchd); if (tnchd_status > 1) cache_unlock(&tnchd); if (tnchd_status > 0) cache_drop(&tnchd); *mrq = info.mreq; if (tdirp) vrele(tdirp); nlookup_done(&tond); if (fdirp) vrele(fdirp); nlookup_done(&fromnd); return (error); } /* * nfs link service */ int nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nlookupdata nd; int error = 0, rdonly, len, dirfor_ret = 1, diraft_ret = 1; int getret = 1; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; struct vnode *xp; struct mount *xmp; struct vattr dirfor, diraft, at; nfsfh_t nfh, dnfh; fhandle_t *fhp, *dfhp; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = dvp = vp = xp = NULL; xmp = NULL; fhp = &nfh.fh_generic; dfhp = &dnfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, dfhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); error = nfsrv_fhtovp(fhp, FALSE, &xmp, &xp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_WCCDATA(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); xp = NULL; error = 0; goto nfsmout; } if (xp->v_type == VDIR) { error = EPERM; /* POSIX */ goto out1; } error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, dfhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) { if (info.v3) dirfor_ret = VOP_GETATTR(dirp, &dirfor); } if (error) goto out1; if (vp != NULL) { error = EEXIST; goto out; } if (xp->v_mount != dvp->v_mount) error = EXDEV; out: if (!error) { vn_unlock(dvp); error = VOP_NLINK(&nd.nl_nch, dvp, xp, nd.nl_cred); vrele(dvp); dvp = NULL; } /* fall through */ out1: if (info.v3) getret = VOP_GETATTR(xp, &at); if (dirp) diraft_ret = VOP_GETATTR(dirp, &diraft); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_WCCDATA(info.v3), &error)); if (info.v3) { nfsm_srvpostop_attr(&info, nfsd, getret, &at); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; } /* fall through */ nfsmout: *mrq = info.mreq; nlookup_done(&nd); if (dirp) vrele(dirp); if (xp) vrele(xp); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) vput(vp); return(error); } /* * nfs symbolic link service */ int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vattr va, dirfor, diraft; struct nlookupdata nd; struct vattr *vap = &va; struct nfsv2_sattr *sp; char *pathcp = NULL; struct uio io; struct iovec iv; int error = 0, len, len2, dirfor_ret = 1, diraft_ret = 1; struct vnode *dirp; struct vnode *vp; struct vnode *dvp; nfsfh_t nfh; fhandle_t *fhp; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) { if (info.v3) dirfor_ret = VOP_GETATTR(dirp, &dirfor); } if (error) goto out; VATTR_NULL(vap); if (info.v3) { ERROROUT(nfsm_srvsattr(&info, vap)); } NEGATIVEOUT(len2 = nfsm_strsiz(&info, NFS_MAXPATHLEN)); pathcp = kmalloc(len2 + 1, M_TEMP, M_WAITOK); iv.iov_base = pathcp; iv.iov_len = len2; io.uio_resid = len2; io.uio_offset = 0; io.uio_iov = &iv; io.uio_iovcnt = 1; io.uio_segflg = UIO_SYSSPACE; io.uio_rw = UIO_READ; io.uio_td = NULL; ERROROUT(nfsm_mtouio(&info, &io, len2)); if (info.v3 == 0) { NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); vap->va_mode = nfstov_mode(sp->sa_mode); } *(pathcp + len2) = '\0'; if (vp) { error = EEXIST; goto out; } if (vap->va_mode == (mode_t)VNOVAL) vap->va_mode = 0; if (dvp != vp) vn_unlock(dvp); error = VOP_NSYMLINK(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap, pathcp); vrele(dvp); dvp = NULL; if (error == 0) { bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); error = VFS_VPTOFH(vp, &fhp->fh_fid); if (!error) error = VOP_GETATTR(vp, vap); } out: if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) { vput(vp); vp = NULL; } if (pathcp) { kfree(pathcp, M_TEMP); pathcp = NULL; } if (dirp) { diraft_ret = VOP_GETATTR(dirp, &diraft); vrele(dirp); dirp = NULL; } NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_SRVFH(info.v3) + NFSX_POSTOPATTR(info.v3) + NFSX_WCCDATA(info.v3), &error)); if (info.v3) { if (!error) { nfsm_srvpostop_fh(&info, fhp); nfsm_srvpostop_attr(&info, nfsd, 0, vap); } nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); } error = 0; /* fall through */ nfsmout: *mrq = info.mreq; nlookup_done(&nd); if (vp) vput(vp); if (dirp) vrele(dirp); if (pathcp) kfree(pathcp, M_TEMP); return (error); } /* * nfs mkdir service */ int nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vattr va, dirfor, diraft; struct vattr *vap = &va; struct nfs_fattr *fp; struct nlookupdata nd; u_int32_t *tl; int error = 0, len, dirfor_ret = 1, diraft_ret = 1; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; nfsfh_t nfh; fhandle_t *fhp; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.dpos = nfsd->nd_dpos; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.v3 = (nfsd->nd_flag & ND_NFSV3); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) { if (info.v3) dirfor_ret = VOP_GETATTR(dirp, &dirfor); } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; goto nfsmout; } VATTR_NULL(vap); if (info.v3) { ERROROUT(nfsm_srvsattr(&info, vap)); } else { NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); vap->va_mode = nfstov_mode(*tl++); } /* * At this point nd.ni_dvp is referenced and exclusively locked and * nd.ni_vp, if it exists, is referenced but not locked. */ vap->va_type = VDIR; if (vp != NULL) { error = EEXIST; goto out; } /* * Issue mkdir op. Since SAVESTART is not set, the pathname * component is freed by the VOP call. This will fill-in * nd.ni_vp, reference, and exclusively lock it. */ if (vap->va_mode == (mode_t)VNOVAL) vap->va_mode = 0; vn_unlock(dvp); error = VOP_NMKDIR(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); vrele(dvp); dvp = NULL; if (error == 0) { bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); error = VFS_VPTOFH(vp, &fhp->fh_fid); if (error == 0) error = VOP_GETATTR(vp, vap); } out: if (dirp) diraft_ret = VOP_GETATTR(dirp, &diraft); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_SRVFH(info.v3) + NFSX_POSTOPATTR(info.v3) + NFSX_WCCDATA(info.v3), &error)); if (info.v3) { if (!error) { nfsm_srvpostop_fh(&info, fhp); nfsm_srvpostop_attr(&info, nfsd, 0, vap); } nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); } else { nfsm_srvfhtom(&info, fhp); fp = nfsm_build(&info, NFSX_V2FATTR); nfsm_srvfattr(nfsd, vap, fp); } error = 0; /* fall through */ nfsmout: *mrq = info.mreq; nlookup_done(&nd); if (dirp) vrele(dirp); if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } if (vp) vput(vp); return (error); } /* * nfs rmdir service */ int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; int error = 0, len, dirfor_ret = 1, diraft_ret = 1; struct vnode *dirp; struct vnode *dvp; struct vnode *vp; struct vattr dirfor, diraft; nfsfh_t nfh; fhandle_t *fhp; struct nlookupdata nd; struct nfsm_info info; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); nlookup_zero(&nd); dirp = NULL; dvp = NULL; vp = NULL; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); error = nfs_namei(&nd, cred, NLC_DELETE, &dvp, &vp, fhp, len, slp, nam, &info.md, &info.dpos, &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); if (dirp) { if (info.v3) dirfor_ret = VOP_GETATTR(dirp, &dirfor); } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; goto nfsmout; } if (vp->v_type != VDIR) { error = ENOTDIR; goto out; } /* * The root of a mounted filesystem cannot be deleted. */ if (vp->v_flag & VROOT) error = EBUSY; out: /* * Issue or abort op. Since SAVESTART is not set, path name * component is freed by the VOP after either. */ if (!error) { if (dvp != vp) vn_unlock(dvp); vput(vp); vp = NULL; error = VOP_NRMDIR(&nd.nl_nch, dvp, nd.nl_cred); vrele(dvp); dvp = NULL; } nlookup_done(&nd); if (dirp) diraft_ret = VOP_GETATTR(dirp, &diraft); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); if (info.v3) { nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft); error = 0; } /* fall through */ nfsmout: *mrq = info.mreq; if (dvp) { if (dvp == vp) vrele(dvp); else vput(dvp); } nlookup_done(&nd); if (dirp) vrele(dirp); if (vp) vput(vp); return(error); } /* * nfs readdir service * - mallocs what it thinks is enough to read * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR * - calls VOP_READDIR() * - loops around building the reply * if the output generated exceeds count break out of loop * The nfsm_clget macro is used here so that the reply will be packed * tightly in mbuf clusters. * - it only knows that it has encountered eof when the VOP_READDIR() * reads nothing * - as such one readdir rpc will return eof false although you are there * and then the next will return eof * - it trims out records with d_fileno == 0 * this doesn't matter for Unix clients, but they might confuse clients * for other os'. * NB: It is tempting to set eof to true if the VOP_READDIR() reads less * than requested, but this may not apply to all filesystems. For * example, client NFS does not { although it is never remote mounted * anyhow } * The alternate call nfsrv_readdirplus() does lookups as well. * PS: The NFS protocol spec. does not clarify what the "count" byte * argument is a count of.. just name strings and file id's or the * entire reply rpc or ... * I tried just file name and id sizes and it confused the Sun client, * so I am using the full rpc size now. The "paranoia.." comment refers * to including the status longwords that are not a part of the dir. * "entry" structures, but are in the rpc. */ struct flrep { nfsuint64 fl_off; u_int32_t fl_postopok; u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; u_int32_t fl_fhok; u_int32_t fl_fhsize; u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; }; int nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; char *bp, *be; struct dirent *dp; caddr_t cp; u_int32_t *tl; struct mbuf *mp1, *mp2; char *cpos, *cend, *rbuf; struct vnode *vp = NULL; struct mount *mp = NULL; struct vattr at; nfsfh_t nfh; fhandle_t *fhp; struct uio io; struct iovec iv; int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; int siz, cnt, fullsiz, eofflag, rdonly, ncookies; u_quad_t off, toff; #if 0 u_quad_t verf; #endif off_t *cookies = NULL, *cookiep; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); if (info.v3) { NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); toff = fxdr_hyper(tl); tl += 2; #if 0 verf = fxdr_hyper(tl); #endif tl += 2; } else { NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); toff = fxdr_unsigned(u_quad_t, *tl++); #if 0 verf = 0; /* shut up gcc */ #endif } off = toff; cnt = fxdr_unsigned(int, *tl); siz = roundup2(cnt, DIRBLKSIZ); xfer = NFS_SRVMAXDATA(nfsd); if ((unsigned)cnt > xfer) cnt = xfer; if ((unsigned)siz > xfer) siz = xfer; fullsiz = siz; error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (!error && vp->v_type != VDIR) { error = ENOTDIR; vput(vp); vp = NULL; } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } /* * Obtain lock on vnode for this section of the code */ if (info.v3) { error = getret = VOP_GETATTR(vp, &at); #if 0 /* * XXX This check may be too strict for Solaris 2.5 clients. */ if (!error && toff && verf && verf != at.va_filerev) error = NFSERR_BAD_COOKIE; #endif } if (!error) error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0); if (error) { vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } vn_unlock(vp); /* * end section. Allocate rbuf and continue */ rbuf = kmalloc(siz, M_TEMP, M_WAITOK); again: iv.iov_base = rbuf; iv.iov_len = fullsiz; io.uio_iov = &iv; io.uio_iovcnt = 1; io.uio_offset = (off_t)off; io.uio_resid = fullsiz; io.uio_segflg = UIO_SYSSPACE; io.uio_rw = UIO_READ; io.uio_td = NULL; eofflag = 0; if (cookies) { kfree((caddr_t)cookies, M_TEMP); cookies = NULL; } error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); off = (off_t)io.uio_offset; if (!cookies && !error) error = NFSERR_PERM; if (info.v3) { getret = VOP_GETATTR(vp, &at); if (!error) error = getret; } if (error) { vrele(vp); vp = NULL; kfree((caddr_t)rbuf, M_TEMP); if (cookies) kfree((caddr_t)cookies, M_TEMP); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3), &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } if (io.uio_resid) { siz -= io.uio_resid; /* * If nothing read, return eof * rpc reply */ if (siz == 0) { vrele(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_COOKIEVERF(info.v3) + 2 * NFSX_UNSIGNED, &error)); if (info.v3) { nfsm_srvpostop_attr(&info, nfsd, getret, &at); tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); tl += 2; } else tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); *tl++ = nfs_false; *tl = nfs_true; kfree((caddr_t)rbuf, M_TEMP); kfree((caddr_t)cookies, M_TEMP); error = 0; goto nfsmout; } } /* * Check for degenerate cases of nothing useful read. * If so go try again */ cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; cookiep = cookies; /* * For some reason FreeBSD's ufs_readdir() chooses to back the * directory offset up to a block boundary, so it is necessary to * skip over the records that preceed the requested offset. This * requires the assumption that file offset cookies monotonically * increase. */ while (cpos < cend && ncookies > 0 && (dp->d_ino == 0 || dp->d_type == DT_WHT || ((u_quad_t)(*cookiep)) <= toff)) { dp = _DIRENT_NEXT(dp); cpos = (char *)dp; cookiep++; ncookies--; } if (cpos >= cend || ncookies == 0) { toff = off; siz = fullsiz; goto again; } len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_COOKIEVERF(info.v3) + siz, &error)); if (info.v3) { nfsm_srvpostop_attr(&info, nfsd, getret, &at); tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); } mp1 = mp2 = info.mb; bp = info.bpos; be = bp + M_TRAILINGSPACE(mp1); /* Loop through the records and build reply */ while (cpos < cend && ncookies > 0) { if (dp->d_ino != 0 && dp->d_type != DT_WHT) { nlen = dp->d_namlen; rem = nfsm_rndup(nlen) - nlen; len += (4 * NFSX_UNSIGNED + nlen + rem); if (info.v3) len += 2 * NFSX_UNSIGNED; if (len > cnt) { eofflag = 0; break; } /* * Build the directory record xdr from * the dirent entry. */ tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = nfs_true; bp += NFSX_UNSIGNED; if (info.v3) { tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(dp->d_ino >> 32); bp += NFSX_UNSIGNED; } tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(dp->d_ino); bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(nlen); bp += NFSX_UNSIGNED; /* And loop around copying the name */ xfer = nlen; cp = dp->d_name; while (xfer > 0) { tl = nfsm_clget(&info, mp1, mp2, bp, be); if ((bp+xfer) > be) tsiz = be-bp; else tsiz = xfer; bcopy(cp, bp, tsiz); bp += tsiz; xfer -= tsiz; if (xfer > 0) cp += tsiz; } /* And null pad to a int32_t boundary */ for (i = 0; i < rem; i++) *bp++ = '\0'; tl = nfsm_clget(&info, mp1, mp2, bp, be); /* Finish off the record */ if (info.v3) { *tl = txdr_unsigned(*cookiep >> 32); bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); } *tl = txdr_unsigned(*cookiep); bp += NFSX_UNSIGNED; } dp = _DIRENT_NEXT(dp); cpos = (char *)dp; cookiep++; ncookies--; } vrele(vp); vp = NULL; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = nfs_false; bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); if (eofflag) *tl = nfs_true; else *tl = nfs_false; bp += NFSX_UNSIGNED; if (mp1 != info.mb) { if (bp < be) mp1->m_len = bp - mtod(mp1, caddr_t); } else mp1->m_len += bp - info.bpos; kfree((caddr_t)rbuf, M_TEMP); kfree((caddr_t)cookies, M_TEMP); nfsmout: *mrq = info.mreq; if (vp) vrele(vp); return(error); } int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; char *bp, *be; struct dirent *dp; caddr_t cp; u_int32_t *tl; struct mbuf *mp1, *mp2; char *cpos, *cend, *rbuf; struct vnode *vp = NULL, *nvp; struct mount *mp = NULL; struct flrep fl; nfsfh_t nfh; fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; struct uio io; struct iovec iv; struct vattr va, at, *vap = &va; struct nfs_fattr *fp; int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; int siz, cnt, fullsiz, eofflag, rdonly, dirlen, ncookies; u_quad_t off, toff; #if 0 u_quad_t verf; #endif off_t *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */ struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NULLOUT(tl = nfsm_dissect(&info, 6 * NFSX_UNSIGNED)); toff = fxdr_hyper(tl); tl += 2; #if 0 verf = fxdr_hyper(tl); #endif tl += 2; siz = fxdr_unsigned(int, *tl++); cnt = fxdr_unsigned(int, *tl); off = toff; siz = roundup2(siz, DIRBLKSIZ); xfer = NFS_SRVMAXDATA(nfsd); if ((unsigned)cnt > xfer) cnt = xfer; if ((unsigned)siz > xfer) siz = xfer; fullsiz = siz; error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (!error && vp->v_type != VDIR) { error = ENOTDIR; vput(vp); vp = NULL; } if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } error = getret = VOP_GETATTR(vp, &at); #if 0 /* * XXX This check may be too strict for Solaris 2.5 clients. */ if (!error && toff && verf && verf != at.va_filerev) error = NFSERR_BAD_COOKIE; #endif if (!error) { error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0); } if (error) { vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } vn_unlock(vp); rbuf = kmalloc(siz, M_TEMP, M_WAITOK); again: iv.iov_base = rbuf; iv.iov_len = fullsiz; io.uio_iov = &iv; io.uio_iovcnt = 1; io.uio_offset = (off_t)off; io.uio_resid = fullsiz; io.uio_segflg = UIO_SYSSPACE; io.uio_rw = UIO_READ; io.uio_td = NULL; eofflag = 0; if (cookies) { kfree((caddr_t)cookies, M_TEMP); cookies = NULL; } error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); off = (u_quad_t)io.uio_offset; getret = VOP_GETATTR(vp, &at); if (!cookies && !error) error = NFSERR_PERM; if (!error) error = getret; if (error) { vrele(vp); vp = NULL; if (cookies) kfree((caddr_t)cookies, M_TEMP); kfree((caddr_t)rbuf, M_TEMP); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } if (io.uio_resid) { siz -= io.uio_resid; /* * If nothing read, return eof * rpc reply */ if (siz == 0) { vrele(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); tl += 2; *tl++ = nfs_false; *tl = nfs_true; kfree((caddr_t)cookies, M_TEMP); kfree((caddr_t)rbuf, M_TEMP); error = 0; goto nfsmout; } } /* * Check for degenerate cases of nothing useful read. * If so go try again */ cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; cookiep = cookies; /* * For some reason FreeBSD's ufs_readdir() chooses to back the * directory offset up to a block boundary, so it is necessary to * skip over the records that preceed the requested offset. This * requires the assumption that file offset cookies monotonically * increase. */ while (cpos < cend && ncookies > 0 && (dp->d_ino == 0 || dp->d_type == DT_WHT || ((u_quad_t)(*cookiep)) <= toff)) { dp = _DIRENT_NEXT(dp); cpos = (char *)dp; cookiep++; ncookies--; } if (cpos >= cend || ncookies == 0) { toff = off; siz = fullsiz; goto again; } /* * Probe one of the directory entries to see if the filesystem * supports VGET. */ if (VFS_VGET(vp->v_mount, vp, dp->d_ino, &nvp) == EOPNOTSUPP) { error = NFSERR_NOTSUPP; vrele(vp); vp = NULL; kfree((caddr_t)cookies, M_TEMP); kfree((caddr_t)rbuf, M_TEMP); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } if (nvp) { vput(nvp); nvp = NULL; } dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, cnt, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); mp1 = mp2 = info.mb; bp = info.bpos; be = bp + M_TRAILINGSPACE(mp1); /* Loop through the records and build reply */ while (cpos < cend && ncookies > 0) { if (dp->d_ino != 0 && dp->d_type != DT_WHT) { nlen = dp->d_namlen; rem = nfsm_rndup(nlen) - nlen; /* * For readdir_and_lookup get the vnode using * the file number. */ if (VFS_VGET(vp->v_mount, vp, dp->d_ino, &nvp)) goto invalid; bzero((caddr_t)nfhp, NFSX_V3FH); nfhp->fh_fsid = fhp->fh_fsid; if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { vput(nvp); nvp = NULL; goto invalid; } if (VOP_GETATTR(nvp, vap)) { vput(nvp); nvp = NULL; goto invalid; } vput(nvp); nvp = NULL; /* * If either the dircount or maxcount will be * exceeded, get out now. Both of these lengths * are calculated conservatively, including all * XDR overheads. */ len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + NFSX_V3POSTOPATTR); dirlen += (6 * NFSX_UNSIGNED + nlen + rem); if (len > cnt || dirlen > fullsiz) { eofflag = 0; break; } /* * Build the directory record xdr from * the dirent entry. */ fp = (struct nfs_fattr *)&fl.fl_fattr; nfsm_srvfattr(nfsd, vap, fp); fl.fl_off.nfsuquad[0] = txdr_unsigned(*cookiep >> 32); fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep); fl.fl_postopok = nfs_true; fl.fl_fhok = nfs_true; fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = nfs_true; bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(dp->d_ino >> 32); bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(dp->d_ino); bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = txdr_unsigned(nlen); bp += NFSX_UNSIGNED; /* And loop around copying the name */ xfer = nlen; cp = dp->d_name; while (xfer > 0) { tl = nfsm_clget(&info, mp1, mp2, bp, be); if ((bp + xfer) > be) tsiz = be - bp; else tsiz = xfer; bcopy(cp, bp, tsiz); bp += tsiz; xfer -= tsiz; cp += tsiz; } /* And null pad to a int32_t boundary */ for (i = 0; i < rem; i++) *bp++ = '\0'; /* * Now copy the flrep structure out. */ xfer = sizeof (struct flrep); cp = (caddr_t)&fl; while (xfer > 0) { tl = nfsm_clget(&info, mp1, mp2, bp, be); if ((bp + xfer) > be) tsiz = be - bp; else tsiz = xfer; bcopy(cp, bp, tsiz); bp += tsiz; xfer -= tsiz; cp += tsiz; } } invalid: dp = _DIRENT_NEXT(dp); cpos = (char *)dp; cookiep++; ncookies--; } vrele(vp); vp = NULL; tl = nfsm_clget(&info, mp1, mp2, bp, be); *tl = nfs_false; bp += NFSX_UNSIGNED; tl = nfsm_clget(&info, mp1, mp2, bp, be); if (eofflag) *tl = nfs_true; else *tl = nfs_false; bp += NFSX_UNSIGNED; if (mp1 != info.mb) { if (bp < be) mp1->m_len = bp - mtod(mp1, caddr_t); } else mp1->m_len += bp - info.bpos; kfree((caddr_t)cookies, M_TEMP); kfree((caddr_t)rbuf, M_TEMP); nfsmout: *mrq = info.mreq; if (vp) vrele(vp); return(error); } /* * nfs commit service */ int nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct vattr bfor, aft; struct vnode *vp = NULL; struct mount *mp = NULL; nfsfh_t nfh; fhandle_t *fhp; u_int32_t *tl; int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt; u_quad_t off; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); /* * XXX At this time VOP_FSYNC() does not accept offset and byte * count parameters, so these arguments are useless (someday maybe). */ off = fxdr_hyper(tl); tl += 2; cnt = fxdr_unsigned(int, *tl); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 2 * NFSX_UNSIGNED, &error)); nfsm_srvwcc_data(&info, nfsd, for_ret, &bfor, aft_ret, &aft); error = 0; goto nfsmout; } for_ret = VOP_GETATTR(vp, &bfor); /* * RFC 1813 3.3.21: If count is 0, a flush from offset to the end of * file is done. At this time VOP_FSYNC does not accept offset and * byte count parameters, so call VOP_FSYNC the whole file for now. */ if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { /* * Give up and do the whole thing */ if (vp->v_object && (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); } error = VOP_FSYNC(vp, MNT_WAIT, 0); } else { /* * Locate and synchronously write any buffers that fall * into the requested range. Note: we are assuming that * f_iosize is a power of 2. */ int iosize = vp->v_mount->mnt_stat.f_iosize; int iomask = iosize - 1; off_t loffset; /* * Align to iosize boundry, super-align to page boundry. */ if (off & iomask) { cnt += off & iomask; off &= ~(u_quad_t)iomask; } if (off & PAGE_MASK) { cnt += off & PAGE_MASK; off &= ~(u_quad_t)PAGE_MASK; } loffset = off; if (vp->v_object && (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { vm_object_page_clean(vp->v_object, off / PAGE_SIZE, (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC); } crit_enter(); while (error == 0 || cnt > 0) { struct buf *bp; /* * If we have a buffer and it is marked B_DELWRI we * have to lock and write it. Otherwise the prior * write is assumed to have already been committed. * * WARNING: FINDBLK_TEST buffers represent stable * storage but not necessarily stable * content. It is ok in this case. */ if ((bp = findblk(vp, loffset, FINDBLK_TEST)) != NULL) { if (bp->b_flags & B_DELWRI) bp = findblk(vp, loffset, 0); else bp = NULL; } if (bp) { if (bp->b_flags & B_DELWRI) { bremfree(bp); error = bwrite(bp); ++nfs_commit_miss; } else { BUF_UNLOCK(bp); } } ++nfs_commit_blks; if (cnt < iosize) break; cnt -= iosize; loffset += iosize; } crit_exit(); } aft_ret = VOP_GETATTR(vp, &aft); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3WCCDATA + NFSX_V3WRITEVERF, &error)); nfsm_srvwcc_data(&info, nfsd, for_ret, &bfor, aft_ret, &aft); if (!error) { tl = nfsm_build(&info, NFSX_V3WRITEVERF); if (nfsver.tv_sec == 0) nfsver = boottime; *tl++ = txdr_unsigned(nfsver.tv_sec); *tl = txdr_unsigned(nfsver.tv_nsec / 1000); } else { error = 0; } nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs statfs service */ int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct statfs *sf; struct nfs_statfs *sfp; int error = 0, rdonly, getret = 1; struct vnode *vp = NULL; struct mount *mp = NULL; struct vattr at; nfsfh_t nfh; fhandle_t *fhp; struct statfs statfs; u_quad_t tval; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; info.v3 = (nfsd->nd_flag & ND_NFSV3); nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } sf = &statfs; error = VFS_STATFS(vp->v_mount, sf, proc0.p_ucred); getret = VOP_GETATTR(vp, &at); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_POSTOPATTR(info.v3) + NFSX_STATFS(info.v3), &error)); if (info.v3) nfsm_srvpostop_attr(&info, nfsd, getret, &at); if (error) { error = 0; goto nfsmout; } sfp = nfsm_build(&info, NFSX_STATFS(info.v3)); if (info.v3) { tval = (u_quad_t)sf->f_blocks; tval *= (u_quad_t)sf->f_bsize; txdr_hyper(tval, &sfp->sf_tbytes); tval = (u_quad_t)sf->f_bfree; tval *= (u_quad_t)sf->f_bsize; txdr_hyper(tval, &sfp->sf_fbytes); tval = (u_quad_t)sf->f_bavail; tval *= (u_quad_t)sf->f_bsize; txdr_hyper(tval, &sfp->sf_abytes); sfp->sf_tfiles.nfsuquad[0] = 0; sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files); sfp->sf_ffiles.nfsuquad[0] = 0; sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); sfp->sf_afiles.nfsuquad[0] = 0; sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); sfp->sf_invarsec = 0; } else { sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); sfp->sf_bsize = txdr_unsigned(sf->f_bsize); sfp->sf_blocks = txdr_unsigned(sf->f_blocks); sfp->sf_bfree = txdr_unsigned(sf->f_bfree); sfp->sf_bavail = txdr_unsigned(sf->f_bavail); } nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs fsinfo service */ int nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nfsv3_fsinfo *sip; int error = 0, rdonly, getret = 1, pref; struct vnode *vp = NULL; struct mount *mp = NULL; struct vattr at; nfsfh_t nfh; fhandle_t *fhp; u_quad_t maxfsize; struct statfs sb; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } /* XXX Try to make a guess on the max file size. */ VFS_STATFS(vp->v_mount, &sb, proc0.p_ucred); maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; getret = VOP_GETATTR(vp, &at); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR + NFSX_V3FSINFO, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); sip = nfsm_build(&info, NFSX_V3FSINFO); /* * XXX * There should be file system VFS OP(s) to get this information. * For now, assume ufs. */ if (slp->ns_so->so_type == SOCK_DGRAM) pref = NFS_MAXDGRAMDATA; else pref = NFS_MAXDATA; sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); sip->fs_rtpref = txdr_unsigned(pref); sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); sip->fs_wtpref = txdr_unsigned(pref); sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); sip->fs_dtpref = txdr_unsigned(pref); txdr_hyper(maxfsize, &sip->fs_maxfilesize); sip->fs_timedelta.nfsv3_sec = 0; sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | NFSV3FSINFO_CANSETTIME); nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * nfs pathconf service */ int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct sockaddr *nam = nfsd->nd_nam; struct ucred *cred = &nfsd->nd_cr; struct nfsv3_pathconf *pc; int error = 0, rdonly, getret = 1; register_t linkmax, namemax, chownres, notrunc; struct vnode *vp = NULL; struct mount *mp = NULL; struct vattr at; nfsfh_t nfh; fhandle_t *fhp; struct nfsm_info info; info.mrep = nfsd->nd_mrep; info.mreq = NULL; info.md = nfsd->nd_md; info.dpos = nfsd->nd_dpos; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); fhp = &nfh.fh_generic; NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); if (error) { NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); error = 0; goto nfsmout; } error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); if (!error) error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); if (!error) error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); if (!error) error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); getret = VOP_GETATTR(vp, &at); vput(vp); vp = NULL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_V3POSTOPATTR + NFSX_V3PATHCONF, &error)); nfsm_srvpostop_attr(&info, nfsd, getret, &at); if (error) { error = 0; goto nfsmout; } pc = nfsm_build(&info, NFSX_V3PATHCONF); pc->pc_linkmax = txdr_unsigned(linkmax); pc->pc_namemax = txdr_unsigned(namemax); pc->pc_notrunc = txdr_unsigned(notrunc); pc->pc_chownrestricted = txdr_unsigned(chownres); /* * These should probably be supported by VOP_PATHCONF(), but * until msdosfs is exportable (why would you want to?), the * Unix defaults should be ok. */ pc->pc_caseinsensitive = nfs_false; pc->pc_casepreserving = nfs_true; nfsmout: *mrq = info.mreq; if (vp) vput(vp); return(error); } /* * Null operation, used by clients to ping server */ /* ARGSUSED */ int nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct nfsm_info info; int error = NFSERR_RETVOID; info.mrep = nfsd->nd_mrep; info.mreq = NULL; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); nfsmout: *mrq = info.mreq; return (error); } /* * No operation, used for obsolete procedures */ /* ARGSUSED */ int nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct thread *td, struct mbuf **mrq) { struct nfsm_info info; int error; info.mrep = nfsd->nd_mrep; info.mreq = NULL; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); if (nfsd->nd_repstat) error = nfsd->nd_repstat; else error = EPROCUNAVAIL; NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); error = 0; nfsmout: *mrq = info.mreq; return (error); } /* * Perform access checking for vnodes obtained from file handles that would * refer to files already opened by a Unix client. You cannot just use * vn_writechk() and VOP_ACCESS() for two reasons: * * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case * 2 - The owner is to be given access irrespective of mode bits for some * operations, so that processes that chmod after opening a file don't * break. I don't like this because it opens a security hole, but since * the nfs server opens a security hole the size of a barn door anyhow, * what the heck. * * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() * will return EPERM instead of EACCESS. EPERM is always an error. */ static int nfsrv_access(struct mount *mp, struct vnode *vp, int flags, struct ucred *cred, int rdonly, struct thread *td, int override) { struct vattr vattr; int error; nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); if (flags & VWRITE) { /* Just vn_writechk() changed to check rdonly */ /* * Disallow write attempts on read-only file systems; * unless the file is a socket or a block or character * device resident on the file system. */ if (rdonly || ((mp->mnt_flag | vp->v_mount->mnt_flag) & MNT_RDONLY)) { switch (vp->v_type) { case VREG: case VDIR: case VLNK: return (EROFS); default: break; } } /* * If there's shared text associated with * the inode, we can't allow writing. */ if (vp->v_flag & VTEXT) return (ETXTBSY); } error = VOP_GETATTR(vp, &vattr); if (error) return (error); error = VOP_ACCESS(vp, flags, cred); /* XXX ruid/rgid vs uid/gid */ /* * Allow certain operations for the owner (reads and writes * on files that are already open). */ if (override && error == EACCES && cred->cr_uid == vattr.va_uid) error = 0; return error; } #endif /* NFS_NOSERVER */