/* $NetBSD: nfs_serv.c,v 1.177.4.1 2023/03/30 11:59:24 martin Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Macklem at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 */ /* * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.177.4.1 2023/03/30 11:59:24 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); /* Global vars */ extern u_int32_t nfs_xdrneg1; extern u_int32_t nfs_false, nfs_true; extern const enum vtype nv3tov_type[8]; extern struct nfsstats nfsstats; extern const nfstype nfsv2_type[9]; extern const nfstype nfsv3_type[9]; int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; bool nfsd_use_loan = true; /* use page-loan for READ OP */ #define nqsrv_getl(vp, rw) /* nothing */ static const struct syscall_package nfsserver_syscalls[] = { { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, { 0, 0, NULL }, }; static int nfsserver_modcmd(modcmd_t cmd, void *arg) { extern struct vfs_hooks nfs_export_hooks; /* XXX */ int error; switch (cmd) { case MODULE_CMD_INIT: error = syscall_establish(NULL, nfsserver_syscalls); if (error != 0) { return error; } nfs_init(); /* XXX for monolithic kernel */ netexport_init(); nfsrv_initcache(); /* Init the server request cache */ nfsrv_init(0); /* Init server data structures */ vfs_hooks_attach(&nfs_export_hooks); nfs_timer_srvinit(nfsrv_timer); return 0; case MODULE_CMD_FINI: error = syscall_disestablish(NULL, nfsserver_syscalls); if (error != 0) { return error; } /* * Kill export list before detaching VFS hooks, so we * we don't leak state due to a concurrent umount(). */ netexport_fini(); vfs_hooks_detach(&nfs_export_hooks); /* Kill timer before server goes away. */ nfs_timer_srvfini(); nfsrv_fini(); /* Server uses server cache, so kill cache last. */ nfsrv_finicache(); nfs_fini(); return 0; case MODULE_CMD_AUTOUNLOAD: if (netexport_hasexports()) return EBUSY; /*FALLTHROUGH*/ default: return ENOTTY; } } /* * nfs v3 access service */ int nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vnode *vp; nfsrvfh_t nsfh; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, getret; char *cp2; struct mbuf *mb, *mreq __unused; struct vattr va; u_long inmode, testmode, outmode; u_quad_t frev; nfsm_srvmtofh(&nsfh); nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(1, (struct vattr *)0); return (0); } inmode = fxdr_unsigned(u_int32_t, *tl); outmode = 0; if ((inmode & NFSV3ACCESS_READ) && nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) outmode |= NFSV3ACCESS_READ; if (vp->v_type != VDIR) { testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); if (testmode && nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) outmode |= testmode; if ((inmode & NFSV3ACCESS_EXECUTE) && nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) outmode |= NFSV3ACCESS_EXECUTE; } else { testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | NFSV3ACCESS_DELETE); if (testmode && nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) outmode |= testmode; if ((inmode & NFSV3ACCESS_LOOKUP) && nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) outmode |= NFSV3ACCESS_LOOKUP; } getret = VOP_GETATTR(vp, &va, cred); vput(vp); nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &va); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = txdr_unsigned(outmode); nfsm_srvdone; } /* * nfs getattr service */ int nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct nfs_fattr *fp; struct vattr va; struct vnode *vp; nfsrvfh_t nsfh; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0; char *cp2; struct mbuf *mb, *mreq __unused; u_quad_t frev; nfsm_srvmtofh(&nsfh); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(0); return (0); } nqsrv_getl(vp, ND_READ); error = VOP_GETATTR(vp, &va, cred); vput(vp); nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); if (error) return (0); nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); nfsm_srvfillattr(&va, fp); nfsm_srvdone; } /* * nfs setattr service */ int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vattr va, preat; struct nfsv2_sattr *sp; struct nfs_fattr *fp; struct vnode *vp; nfsrvfh_t nsfh; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; char *cp2; struct mbuf *mb, *mreq __unused; u_quad_t frev; struct timespec guard; memset(&guard, 0, sizeof guard); /* XXX gcc */ nfsm_srvmtofh(&nsfh); vattr_null(&va); if (v3) { nfsm_srvsattr(&va); nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); gcheck = fxdr_unsigned(int, *tl); if (gcheck) { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); fxdr_nfsv3time(tl, &guard); } } else { nfsm_dissect(sp, struct nfsv2_sattr *, 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) va.va_mode = nfstov_mode(sp->sa_mode); if (sp->sa_uid != nfs_xdrneg1) va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); if (sp->sa_gid != nfs_xdrneg1) va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); if (sp->sa_size != nfs_xdrneg1) va.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, &va.va_atime); #else va.va_atime.tv_sec = fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); va.va_atime.tv_nsec = 0; #endif } if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); } /* * Now that we have all the fields, lets do it. */ error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); return (0); } nqsrv_getl(vp, ND_WRITE); if (v3) { error = preat_ret = VOP_GETATTR(vp, &preat, cred); 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); nfsm_reply(NFSX_WCCDATA(v3)); nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); return (0); } } /* * If the size is being changed write acces is required, otherwise * just check for a read only file system. */ if (va.va_size == ((u_quad_t)((quad_t) -1))) { if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { error = EROFS; goto out; } } else { if (vp->v_type == VDIR) { error = EISDIR; goto out; } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0)) != 0) goto out; } error = VOP_SETATTR(vp, &va, cred); postat_ret = VOP_GETATTR(vp, &va, cred); if (!error) error = postat_ret; out: vput(vp); nfsm_reply(NFSX_WCCORFATTR(v3)); if (v3) { nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); return (0); } else { nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } nfsm_srvdone; } /* * nfs lookup rpc */ int nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct nfs_fattr *fp; struct nameidata nd, ind, *ndp = &nd; struct pathbuf *ipb = NULL; struct vnode *vp, *dirp; nfsrvfh_t nsfh; char *cp; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, cache = 0, dirattr_ret = 1; uint32_t len; int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; char *cp2; struct mbuf *mb, *mreq __unused; struct vattr va, dirattr; u_quad_t frev; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); pubflag = nfs_ispublicfh(&nsfh); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = LOOKUP; nd.ni_cnd.cn_flags = LOCKLEAF; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); if (!error && pubflag) { if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && (ipb = pathbuf_create(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. */ ind = nd; VOP_UNLOCK(nd.ni_vp); ind.ni_pathbuf = ipb; error = lookup_for_nfsd_index(&ind, nd.ni_vp); if (!error) { /* * Found an index file. Get rid of * the old references. */ if (dirp) vrele(dirp); dirp = nd.ni_vp; ndp = &ind; } else error = 0; } /* * If the public filehandle was used, check that this lookup * didn't result in a filehandle outside the publicly exported * filesystem. */ if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { vput(nd.ni_vp); error = EPERM; } } if (error) { if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); } if (ipb != NULL) { pathbuf_destroy(ipb); } if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); vput(dirp); } else vrele(dirp); } nfsm_reply(NFSX_POSTOPATTR(v3)); nfsm_srvpostop_attr(dirattr_ret, &dirattr); return (0); } nqsrv_getl(ndp->ni_startdir, ND_READ); pathbuf_destroy(nd.ni_pathbuf); if (ipb != NULL) { pathbuf_destroy(ipb); } vp = ndp->ni_vp; error = nfsrv_composefh(vp, &nsfh, v3); if (!error) error = VOP_GETATTR(vp, &va, cred); vput(vp); if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); vput(dirp); } else vrele(dirp); } nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); if (error) { nfsm_srvpostop_attr(dirattr_ret, &dirattr); return (0); } nfsm_srvfhtom(&nsfh, v3); if (v3) { nfsm_srvpostop_attr(0, &va); nfsm_srvpostop_attr(dirattr_ret, &dirattr); } else { nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } nfsm_srvdone; } /* * nfs readlink service */ int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; struct iovec *ivp = iv; struct mbuf *mp; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, i, padlen, getret; uint32_t len; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; struct vnode *vp; struct vattr attr; nfsrvfh_t nsfh; struct uio io, *uiop = &io; u_quad_t frev; nfsm_srvmtofh(&nsfh); len = 0; i = 0; while (len < NFS_MAXPATHLEN) { mp = m_get(M_WAIT, MT_DATA); MCLAIM(mp, &nfs_mowner); m_clget(mp, M_WAIT); mp->m_len = NFSMSIZ(mp); if (len == 0) mp3 = mp2 = mp; else { mp2->m_next = mp; mp2 = mp; } if ((len+mp->m_len) > NFS_MAXPATHLEN) { mp->m_len = NFS_MAXPATHLEN-len; len = NFS_MAXPATHLEN; } else len += mp->m_len; ivp->iov_base = mtod(mp, void *); ivp->iov_len = mp->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; UIO_SETUP_SYSSPACE(uiop); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { m_freem(mp3); nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvpostop_attr(1, (struct vattr *)0); return (0); } if (vp->v_type != VLNK) { if (v3) error = EINVAL; else error = ENXIO; goto out; } nqsrv_getl(vp, ND_READ); error = VOP_READLINK(vp, uiop, cred); out: getret = VOP_GETATTR(vp, &attr, cred); vput(vp); if (error) m_freem(mp3); nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); if (v3) { nfsm_srvpostop_attr(getret, &attr); if (error) return (0); } len -= uiop->uio_resid; padlen = nfsm_padlen(len); if (len == 0) { m_freem(mp3); mp3 = NULL; } else if (uiop->uio_resid || padlen) nfs_zeropad(mp3, uiop->uio_resid, padlen); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = txdr_unsigned(len); mb->m_next = mp3; nfsm_srvdone; } /* * nfs read service */ int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct mbuf *m; struct nfs_fattr *fp; u_int32_t *tl; int32_t t1; int i; char *bpos; int error = 0, rdonly, cache = 0, getret; int v3 = (nfsd->nd_flag & ND_NFSV3); uint32_t reqlen, len, cnt, left; int padlen; char *cp2; struct mbuf *mb, *mreq; struct vnode *vp; nfsrvfh_t nsfh; struct uio io, *uiop = &io; struct vattr va; off_t off; u_quad_t frev; nfsm_srvmtofh(&nsfh); if (v3) { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); off = fxdr_hyper(tl); } else { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); off = (off_t)fxdr_unsigned(u_int32_t, *tl); } nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); reqlen = fxdr_unsigned(uint32_t, *tl); reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvpostop_attr(1, (struct vattr *)0); return (0); } if (vp->v_type != VREG) { if (v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } if (!error) { nqsrv_getl(vp, ND_READ); if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); } getret = VOP_GETATTR(vp, &va, cred); if (!error) error = getret; if (error) { vput(vp); nfsm_reply(NFSX_POSTOPATTR(v3)); nfsm_srvpostop_attr(getret, &va); return (0); } if (off >= va.va_size) cnt = 0; else if ((off + reqlen) > va.va_size) cnt = va.va_size - off; else cnt = reqlen; nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); if (v3) { nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); *tl++ = nfs_true; fp = (struct nfs_fattr *)tl; tl += (NFSX_V3FATTR / sizeof (u_int32_t)); } else { nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); fp = (struct nfs_fattr *)tl; tl += (NFSX_V2FATTR / sizeof (u_int32_t)); } len = left = cnt; if (cnt > 0) { if (nfsd_use_loan) { struct vm_page **pgpp; voff_t pgoff = trunc_page(off); int npages; vaddr_t lva; npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ /* allocate kva for mbuf data */ lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, slp->ns_so); if (lva == 0) { /* fall back to VOP_READ */ goto loan_fail; } /* allocate mbuf */ m = m_get(M_WAIT, MT_DATA); MCLAIM(m, &nfs_mowner); pgpp = m->m_ext.ext_pgs; /* loan pages */ error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, pgpp); if (error) { sokvafree(lva, npages << PAGE_SHIFT); m_free(m); if (error == EBUSY) goto loan_fail; goto read_error; } /* associate kva to mbuf */ MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), cnt, M_MBUF, soloanfree, slp->ns_so); m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; m->m_len = cnt; /* map pages */ for (i = 0; i < npages; i++) { pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), VM_PROT_READ, 0); lva += PAGE_SIZE; } pmap_update(pmap_kernel()); mb->m_next = m; mb = m; error = 0; uiop->uio_resid = 0; } else { struct iovec *iv; struct iovec *iv2; struct mbuf *m2; int siz; loan_fail: /* * Generate the mbuf list with the uio_iov ref. to it. */ i = 0; m = m2 = mb; while (left > 0) { siz = uimin(M_TRAILINGSPACE(m), left); if (siz > 0) { left -= siz; i++; } if (left > 0) { m = m_get(M_WAIT, MT_DATA); MCLAIM(m, &nfs_mowner); m_clget(m, M_WAIT); m->m_len = 0; m2->m_next = m; m2 = m; } } iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = iv2 = iv; m = mb; left = cnt; i = 0; while (left > 0) { if (m == NULL) panic("nfsrv_read iov"); siz = uimin(M_TRAILINGSPACE(m), left); if (siz > 0) { iv->iov_base = mtod(m, char *) + 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 = cnt; uiop->uio_rw = UIO_READ; UIO_SETUP_SYSSPACE(uiop); error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); free((void *)iv2, M_TEMP); } read_error: if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ if (!error) error = getret; m_freem(mreq); vput(vp); nfsm_reply(NFSX_POSTOPATTR(v3)); nfsm_srvpostop_attr(getret, &va); return (0); } } else { uiop->uio_resid = 0; } vput(vp); nfsm_srvfillattr(&va, fp); len -= uiop->uio_resid; padlen = nfsm_padlen(len); if (uiop->uio_resid || padlen) nfs_zeropad(mb, uiop->uio_resid, padlen); if (v3) { /* count */ *tl++ = txdr_unsigned(len); /* eof */ if (off + len >= va.va_size) *tl++ = nfs_true; else *tl++ = nfs_false; } *tl = txdr_unsigned(len); nfsm_srvdone; } /* * nfs write service */ int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct iovec *ivp; int i, cnt; struct mbuf *mp; struct nfs_fattr *fp; struct iovec *iv; struct vattr va, forat; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, len, forat_ret = 1; int ioflags, aftat_ret = 1, retlen, zeroing, adjust; int stable = NFSV3WRITE_FILESYNC; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp; nfsrvfh_t nsfh; struct uio io, *uiop = &io; off_t off; u_quad_t frev; if (mrep == NULL) { *mrq = NULL; return (0); } nfsm_srvmtofh(&nsfh); if (v3) { nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); off = fxdr_hyper(tl); tl += 3; stable = fxdr_unsigned(int, *tl++); } else { nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); off = (off_t)fxdr_unsigned(u_int32_t, *++tl); tl += 2; } 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; mp = mrep; while (mp) { if (mp == md) { zeroing = 0; adjust = dpos - mtod(mp, char *); mp->m_len -= adjust; if (mp->m_len > 0 && adjust > 0) NFSMADV(mp, adjust); } if (zeroing) mp->m_len = 0; else if (mp->m_len > 0) { i += mp->m_len; if (i > len) { mp->m_len -= (i - len); zeroing = 1; } if (mp->m_len > 0) cnt++; } mp = mp->m_next; } } if (len > NFS_MAXDATA || len < 0 || i < len) { error = EIO; nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); return (0); } error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); return (0); } if (v3) forat_ret = VOP_GETATTR(vp, &forat, cred); if (vp->v_type != VREG) { if (v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } if (!error) { nqsrv_getl(vp, ND_WRITE); error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); } if (error) { vput(vp); nfsm_reply(NFSX_WCCDATA(v3)); nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); return (0); } if (len > 0) { ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = iv = ivp; uiop->uio_iovcnt = cnt; mp = mrep; while (mp) { if (mp->m_len > 0) { ivp->iov_base = mtod(mp, void *); ivp->iov_len = mp->m_len; ivp++; } mp = mp->m_next; } /* * XXX * The IO_METASYNC flag indicates that all metadata (and not * just enough to ensure data integrity) must 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_offset = off; UIO_SETUP_SYSSPACE(uiop); error = VOP_WRITE(vp, uiop, ioflags, cred); nfsstats.srvvop_writes++; free(iv, M_TEMP); } aftat_ret = VOP_GETATTR(vp, &va, cred); vput(vp); if (!error) error = aftat_ret; nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); if (v3) { nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); if (error) return (0); nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(retlen); if (stable == NFSV3WRITE_UNSTABLE) *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. */ *tl++ = txdr_unsigned(boottime.tv_sec); *tl = txdr_unsigned(boottime.tv_nsec / 1000); } else { nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } nfsm_srvdone; } /* * XXX elad: the original NFSW_SAMECRED() macro also made sure the * two nd_flag fields of the descriptors contained * ND_KERBAUTH. */ static int nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) { int i, do_ngroups; if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) return (0); if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) return (0); do_ngroups = kauth_cred_ngroups(cred1); for (i = 0; i < do_ngroups; i++) if (kauth_cred_group(cred1, i) != kauth_cred_group(cred2, i)) return (0); return (1); } static struct nfsrvw_delayhash * nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) { uint32_t hash; hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), HASH32_BUF_INIT); return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; } /* * 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 lwp *lwp, struct mbuf **mrq) { struct timeval now; struct iovec *ivp; struct mbuf *mp; struct nfsrv_descript *wp, *nfsd, *owp, *swp; struct nfs_fattr *fp; int i = 0; struct iovec *iov; struct nfsrvw_delayhash *wpp; kauth_cred_t cred; struct vattr va, forat; u_int32_t *tl; int32_t t1; char *bpos, *dpos; int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; int ioflags, aftat_ret = 1, adjust, v3, zeroing; char *cp2; struct mbuf *mb, *mreq, *mrep, *md; struct vnode *vp; struct uio io, *uiop = &io; u_quad_t frev, cur_usec; *mrq = NULL; if (*ndp) { nfsd = *ndp; *ndp = NULL; mrep = nfsd->nd_mrep; md = nfsd->nd_md; dpos = nfsd->nd_dpos; cred = nfsd->nd_cr; v3 = (nfsd->nd_flag & ND_NFSV3); LIST_INIT(&nfsd->nd_coalesce); nfsd->nd_mreq = NULL; nfsd->nd_stable = NFSV3WRITE_FILESYNC; getmicrotime(&now); cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; nfsd->nd_time = cur_usec + nfsrvw_procrastinate; /* * Now, get the write header.. */ nfsm_srvmtofh(&nfsd->nd_fh); if (v3) { nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); nfsd->nd_off = fxdr_hyper(tl); tl += 3; nfsd->nd_stable = fxdr_unsigned(int, *tl++); } else { nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); tl += 2; } 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; mp = mrep; while (mp) { if (mp == md) { zeroing = 0; adjust = dpos - mtod(mp, char *); mp->m_len -= adjust; if (mp->m_len > 0 && adjust > 0) NFSMADV(mp, adjust); } if (zeroing) mp->m_len = 0; else { i += mp->m_len; if (i > len) { mp->m_len -= (i - len); zeroing = 1; } } mp = mp->m_next; } if (len > NFS_MAXDATA || len < 0 || i < len) { nfsmout: m_freem(mrep); error = EIO; nfsm_writereply(2 * NFSX_UNSIGNED, v3); if (v3) nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); nfsd->nd_mreq = mreq; nfsd->nd_mrep = NULL; nfsd->nd_time = 0; } /* * Add this entry to the hash and time queues. */ owp = NULL; mutex_enter(&nfsd_lock); wp = LIST_FIRST(&slp->ns_tq); while (wp && wp->nd_time < nfsd->nd_time) { owp = wp; wp = LIST_NEXT(wp, nd_tq); } if (owp) { LIST_INSERT_AFTER(owp, nfsd, nd_tq); } else { LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); } if (nfsd->nd_mrep) { wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); owp = NULL; wp = LIST_FIRST(wpp); while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { owp = wp; wp = LIST_NEXT(wp, nd_hash); } while (wp && wp->nd_off < nfsd->nd_off && !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { owp = wp; wp = LIST_NEXT(wp, nd_hash); } 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 = LIST_NEXT(nfsd, nd_hash); if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) nfsrvw_coalesce(owp, nfsd); } } else { LIST_INSERT_HEAD(wpp, nfsd, nd_hash); } } mutex_exit(&nfsd_lock); } /* * Now, do VOP_WRITE()s for any one(s) that need to be done now * and generate the associated reply mbuf list(s). */ loop1: getmicrotime(&now); cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; mutex_enter(&nfsd_lock); for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { owp = LIST_NEXT(nfsd, nd_tq); if (nfsd->nd_time > cur_usec) break; if (nfsd->nd_mreq) continue; LIST_REMOVE(nfsd, nd_tq); LIST_REMOVE(nfsd, nd_hash); mutex_exit(&nfsd_lock); mrep = nfsd->nd_mrep; nfsd->nd_mrep = NULL; cred = nfsd->nd_cr; v3 = (nfsd->nd_flag & ND_NFSV3); forat_ret = aftat_ret = 1; error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (!error) { if (v3) forat_ret = VOP_GETATTR(vp, &forat, cred); if (vp->v_type != VREG) { if (v3) error = EINVAL; else error = (vp->v_type == VDIR) ? EISDIR : EACCES; } } else vp = NULL; if (!error) { nqsrv_getl(vp, ND_WRITE); error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 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_offset = nfsd->nd_off; uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; UIO_SETUP_SYSSPACE(uiop); if (uiop->uio_resid > 0) { mp = mrep; i = 0; while (mp) { if (mp->m_len > 0) i++; mp = mp->m_next; } uiop->uio_iovcnt = i; iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); uiop->uio_iov = ivp = iov; mp = mrep; while (mp) { if (mp->m_len > 0) { ivp->iov_base = mtod(mp, void *); ivp->iov_len = mp->m_len; ivp++; } mp = mp->m_next; } if (!error) { error = VOP_WRITE(vp, uiop, ioflags, cred); nfsstats.srvvop_writes++; } free((void *)iov, M_TEMP); } m_freem(mrep); if (vp) { aftat_ret = VOP_GETATTR(vp, &va, cred); vput(vp); } /* * Loop around generating replies for all write rpcs that have * now been completed. */ swp = nfsd; do { if (error) { nfsm_writereply(NFSX_WCCDATA(v3), v3); if (v3) { nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); } } else { nfsm_writereply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3), v3); if (v3) { nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); nfsm_build(tl, u_int32_t *, 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. */ *tl++ = txdr_unsigned(boottime.tv_sec); *tl = txdr_unsigned(boottime.tv_nsec / 1000); } else { nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } } nfsd->nd_mreq = 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. */ mutex_enter(&nfsd_lock); if (nfsd != swp) { nfsd->nd_time = 0; LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); } nfsd = LIST_FIRST(&swp->nd_coalesce); if (nfsd) { LIST_REMOVE(nfsd, nd_tq); } mutex_exit(&nfsd_lock); } while (nfsd); swp->nd_time = 0; mutex_enter(&nfsd_lock); LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); mutex_exit(&nfsd_lock); goto loop1; } mutex_exit(&nfsd_lock); nfs_timer_start(); /* * Search for a reply to return. */ mutex_enter(&nfsd_lock); LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { if (nfsd->nd_mreq) { LIST_REMOVE(nfsd, nd_tq); *mrq = nfsd->nd_mreq; *ndp = nfsd; break; } } mutex_exit(&nfsd_lock); 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(). */ void nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) { int overlap; struct mbuf *mp; struct nfsrv_descript *m; KASSERT(mutex_owned(&nfsd_lock)); 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); mp = owp->nd_mrep; while (mp->m_next) mp = mp->m_next; mp->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); /* * nfsd might hold coalesce elements! Move them to owp. * Otherwise, requests may be lost and clients will be stuck. */ while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { LIST_REMOVE(m, nd_tq); LIST_INSERT_HEAD(&owp->nd_coalesce, m, 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 lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct nfs_fattr *fp; struct vattr va, dirfor, diraft; struct nfsv2_sattr *sp; u_int32_t *tl; struct nameidata nd; char *cp; int32_t t1; char *bpos; int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; int rdev = 0, abort = 0; int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp = NULL, *dirp = NULL; nfsrvfh_t nsfh; u_quad_t frev, tempsize; u_char cverf[NFSX_V3CREATEVERF]; nd.ni_cnd.cn_nameiop = 0; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = CREATE; nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp && v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); } if (error) { nfsm_reply(NFSX_WCCDATA(v3)); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); if (dirp) vrele(dirp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } return (0); } abort = 1; vattr_null(&va); if (v3) { va.va_mode = 0; nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); how = fxdr_unsigned(int, *tl); switch (how) { case NFSV3CREATE_GUARDED: if (nd.ni_vp) { error = EEXIST; break; } /* FALLTHROUGH */ case NFSV3CREATE_UNCHECKED: nfsm_srvsattr(&va); break; case NFSV3CREATE_EXCLUSIVE: nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); memcpy(cverf, cp, NFSX_V3CREATEVERF); exclusive_flag = 1; break; }; va.va_type = VREG; } else { nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); if (va.va_type == VNON) va.va_type = VREG; va.va_mode = nfstov_mode(sp->sa_mode); switch (va.va_type) { case VREG: tsize = fxdr_unsigned(int32_t, sp->sa_size); if (tsize != -1) va.va_size = (u_quad_t)tsize; break; case VCHR: case VBLK: case VFIFO: rdev = fxdr_unsigned(int32_t, sp->sa_size); break; default: break; }; } /* * Iff doesn't exist, create it * otherwise just truncate to 0 length * should I set the mode too ?? */ if (nd.ni_vp == NULL) { if (va.va_type == VREG || va.va_type == VSOCK) { nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); if (!error) { vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); if (exclusive_flag) { exclusive_flag = 0; vattr_null(&va); /* * XXX * assuming NFSX_V3CREATEVERF * == sizeof(nfstime3) */ fxdr_nfsv3time(cverf, &va.va_atime); error = VOP_SETATTR(nd.ni_vp, &va, cred); } } } else if (va.va_type == VCHR || va.va_type == VBLK || va.va_type == VFIFO) { if (va.va_type == VCHR && rdev == 0xffffffff) va.va_type = VFIFO; if (va.va_type != VFIFO && (error = kauth_authorize_system(cred, KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); vput(nd.ni_dvp); abort = 0; nfsm_reply(0); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } return (error); } else va.va_rdev = (dev_t)rdev; nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); if (!error) { vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); } else { nfsm_reply(0); } } else { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } error = ENXIO; abort = 0; } vp = nd.ni_vp; } else { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } vp = nd.ni_vp; abort = 0; if (!error && va.va_size != -1) { error = nfsrv_access(vp, VWRITE, cred, (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); if (!error) { nqsrv_getl(vp, ND_WRITE); tempsize = va.va_size; vattr_null(&va); va.va_size = tempsize; error = VOP_SETATTR(vp, &va, cred); } } if (error) vput(vp); } if (!error) { error = nfsrv_composefh(vp, &nsfh, v3); if (!error) error = VOP_GETATTR(vp, &va, cred); vput(vp); } if (nd.ni_dvp == vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (v3) { if (exclusive_flag && !error) { /* * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) */ char oldverf[NFSX_V3CREATEVERF]; txdr_nfsv3time(&va.va_atime, oldverf); if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) error = EEXIST; } if (dirp) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } } if (dirp) { vrele(dirp); dirp = NULL; } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } abort = 0; nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); if (v3) { if (!error) { nfsm_srvpostop_fh(&nsfh); nfsm_srvpostop_attr(0, &va); } nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); } else { nfsm_srvfhtom(&nsfh, v3); nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } return (0); nfsmout: if (dirp) vrele(dirp); if (abort) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vput(nd.ni_vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } } return (error); } /* * nfs v3 mknod service */ int nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vattr va, dirfor, diraft; u_int32_t *tl; struct nameidata nd; int32_t t1; char *bpos; int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; int abort = 0; u_int32_t major, minor; enum vtype vtyp; char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp, *dirp = (struct vnode *)0; nfsrvfh_t nsfh; u_quad_t frev; nd.ni_cnd.cn_nameiop = 0; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = CREATE; nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp) dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); if (error) { nfsm_reply(NFSX_WCCDATA(1)); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); if (dirp) vrele(dirp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } return (0); } abort = 1; nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); vtyp = nfsv3tov_type(*tl); if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { error = NFSERR_BADTYPE; goto abort; } vattr_null(&va); va.va_mode = 0; nfsm_srvsattr(&va); if (vtyp == VCHR || vtyp == VBLK) { dev_t rdev; nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); major = fxdr_unsigned(u_int32_t, *tl++); minor = fxdr_unsigned(u_int32_t, *tl); rdev = makedev(major, minor); if (major(rdev) != major || minor(rdev) != minor) { error = EINVAL; goto abort; } va.va_rdev = rdev; } /* * Iff doesn't exist, create it. */ if (nd.ni_vp) { error = EEXIST; abort: VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_vp) vput(nd.ni_vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } goto out; } va.va_type = vtyp; if (vtyp == VSOCK) { nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); } else { if (va.va_type != VFIFO && (error = kauth_authorize_system(cred, KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); vput(nd.ni_dvp); goto out; } nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); if (error) goto out; } if (!error) { vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); } out: vp = nd.ni_vp; if (!error) { error = nfsrv_composefh(vp, &nsfh, true); if (!error) error = VOP_GETATTR(vp, &va, cred); vput(vp); } if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (dirp) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); vrele(dirp); dirp = NULL; } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } abort = 0; nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); if (!error) { nfsm_srvpostop_fh(&nsfh); nfsm_srvpostop_attr(0, &va); } nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); return (0); nfsmout: if (abort) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vput(nd.ni_vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } } if (dirp) vrele(dirp); return (error); } /* * nfs remove service */ int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct nameidata nd; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp, *dirp; struct vattr dirfor, diraft; nfsrvfh_t nsfh; u_quad_t frev; #ifndef nolint vp = (struct vnode *)0; #endif nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = DELETE; nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (error == 0 && dirp && v3) { if (nd.ni_dvp == nd.ni_vp) vn_lock(dirp, LK_SHARED | LK_RETRY); dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); if (nd.ni_dvp == nd.ni_vp) VOP_UNLOCK(dirp); } if (!error) { vp = nd.ni_vp; if (vp->v_type == VDIR) { error = EPERM; goto out; } /* * The root of a mounted filesystem cannot be deleted. */ if (vp->v_vflag & VV_ROOT) { error = EBUSY; } out: if (!error) { nqsrv_getl(nd.ni_dvp, ND_WRITE); nqsrv_getl(vp, ND_WRITE); error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); vput(nd.ni_dvp); } else { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vput(vp); } } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } vrele(dirp); } nfsm_reply(NFSX_WCCDATA(v3)); if (v3) { nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); return (0); } nfsm_srvdone; } /* * nfs rename service */ int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; uint32_t len, len2; int tdirfor_ret = 1, tdiraft_ret = 1; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct nameidata fromnd, tond; struct vnode *fvp, *tvp, *tdvp; struct vnode *fdirp = NULL, *tdirp = NULL; struct mount *localfs = NULL; struct vattr fdirfor, fdiraft, tdirfor, tdiraft; nfsrvfh_t fnsfh, tnsfh; u_quad_t frev; uid_t saved_uid; #ifndef nolint fvp = (struct vnode *)0; #endif fromnd.ni_cnd.cn_nameiop = 0; tond.ni_cnd.cn_nameiop = 0; nfsm_srvmtofh(&fnsfh); nfsm_srvnamesiz(len); /* * Remember our original uid so that we can reset cr_uid before * the second nfs_namei() call, in case it is remapped. */ saved_uid = kauth_cred_geteuid(cred); fromnd.ni_cnd.cn_cred = cred; fromnd.ni_cnd.cn_nameiop = DELETE; fromnd.ni_cnd.cn_flags = LOCKPARENT; error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (error == 0 && fdirp && v3) { if (fromnd.ni_dvp == fromnd.ni_vp) vn_lock(fdirp, LK_SHARED | LK_RETRY); fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); if (fromnd.ni_dvp == fromnd.ni_vp) VOP_UNLOCK(fdirp); } if (error) { fromnd.ni_cnd.cn_nameiop = 0; nfsm_reply(2 * NFSX_WCCDATA(v3)); nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); if (fdirp) vrele(fdirp); if (fromnd.ni_pathbuf != NULL) { pathbuf_destroy(fromnd.ni_pathbuf); } return (0); } localfs = fromnd.ni_dvp->v_mount; fstrans_start(localfs); if (fromnd.ni_dvp != fromnd.ni_vp) { VOP_UNLOCK(fromnd.ni_dvp); } fvp = fromnd.ni_vp; error = VFS_RENAMELOCK_ENTER(localfs); if (error) { VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); vrele(fromnd.ni_dvp); vrele(fvp); goto out1; } /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ vrele(fvp); if ((fromnd.ni_cnd.cn_namelen == 1 && fromnd.ni_cnd.cn_nameptr[0] == '.') || (fromnd.ni_cnd.cn_namelen == 2 && fromnd.ni_cnd.cn_nameptr[0] == '.' && fromnd.ni_cnd.cn_nameptr[1] == '.')) { error = EINVAL; VFS_RENAMELOCK_EXIT(localfs); VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); vrele(fromnd.ni_dvp); goto out1; } vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); if (error) { VOP_UNLOCK(fromnd.ni_dvp); VFS_RENAMELOCK_EXIT(localfs); VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); vrele(fromnd.ni_dvp); goto out1; } VOP_UNLOCK(fromnd.ni_vp); if (fromnd.ni_dvp != fromnd.ni_vp) VOP_UNLOCK(fromnd.ni_dvp); fvp = fromnd.ni_vp; nfsm_srvmtofh(&tnsfh); if (v3) { nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); len2 = fxdr_unsigned(uint32_t, *tl); /* len2 will be checked by nfs_namei */ } else { /* NFSv2 */ nfsm_strsiz(len2, NFS_MAXNAMLEN); } kauth_cred_seteuid(cred, saved_uid); tond.ni_cnd.cn_cred = cred; tond.ni_cnd.cn_nameiop = RENAME; tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE; error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (tdirp && v3) { tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); } if (error) { VFS_RENAMELOCK_EXIT(localfs); VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); vrele(fromnd.ni_dvp); vrele(fvp); goto out1; } tdvp = tond.ni_dvp; tvp = tond.ni_vp; if (tvp != NULL) { if (fvp->v_type == VDIR && tvp->v_type != VDIR) { if (v3) error = EEXIST; else error = EISDIR; goto out; } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { if (v3) error = EEXIST; else error = ENOTDIR; goto out; } if (tvp->v_type == VDIR && tvp->v_mountedhere) { if (v3) error = EXDEV; else error = ENOTEMPTY; goto out; } } if (fvp->v_type == VDIR && fvp->v_mountedhere) { if (v3) error = EXDEV; else error = ENOTEMPTY; goto out; } if (fvp->v_mount != tdvp->v_mount) { if (v3) error = EXDEV; else error = ENOTEMPTY; goto out; } if (fvp == tdvp) { if (v3) error = EINVAL; else error = ENOTEMPTY; } /* * 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 (fvp == tvp && fromnd.ni_dvp == tdvp && fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, fromnd.ni_cnd.cn_namelen)) error = -1; out: if (!error) { nqsrv_getl(fromnd.ni_dvp, ND_WRITE); nqsrv_getl(tdvp, ND_WRITE); if (tvp) { nqsrv_getl(tvp, ND_WRITE); } error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); VFS_RENAMELOCK_EXIT(localfs); } else { VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); if (tdvp == tvp) vrele(tdvp); else vput(tdvp); if (tvp) vput(tvp); VFS_RENAMELOCK_EXIT(localfs); VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); vrele(fromnd.ni_dvp); vrele(fvp); if (error == -1) error = 0; } if (tond.ni_pathbuf != NULL) { pathbuf_destroy(tond.ni_pathbuf); tond.ni_pathbuf = NULL; } tond.ni_cnd.cn_nameiop = 0; out1: if (fdirp) { if (v3) { vn_lock(fdirp, LK_SHARED | LK_RETRY); fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); VOP_UNLOCK(fdirp); } vrele(fdirp); fdirp = NULL; } if (tdirp) { if (v3) { vn_lock(tdirp, LK_SHARED | LK_RETRY); tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); VOP_UNLOCK(tdirp); } vrele(tdirp); tdirp = NULL; } pathbuf_destroy(fromnd.ni_pathbuf); fromnd.ni_pathbuf = NULL; fromnd.ni_cnd.cn_nameiop = 0; fstrans_done(localfs); localfs = NULL; nfsm_reply(2 * NFSX_WCCDATA(v3)); if (v3) { nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); } return (0); nfsmout: if (fdirp) vrele(fdirp); #ifdef notdef if (tdirp) vrele(tdirp); #endif if (tond.ni_cnd.cn_nameiop) { if (tond.ni_pathbuf != NULL) { pathbuf_destroy(tond.ni_pathbuf); tond.ni_pathbuf = NULL; } } if (localfs) { VFS_RENAMELOCK_EXIT(localfs); fstrans_done(localfs); } if (fromnd.ni_cnd.cn_nameiop) { VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); if (fromnd.ni_pathbuf != NULL) { pathbuf_destroy(fromnd.ni_pathbuf); fromnd.ni_pathbuf = NULL; } vrele(fromnd.ni_dvp); vrele(fvp); } return (error); } /* * nfs link service */ int nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct nameidata nd; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp, *xp, *dirp = (struct vnode *)0; struct vattr dirfor, diraft, at; nfsrvfh_t nsfh, dnsfh; u_quad_t frev; nfsm_srvmtofh(&nsfh); nfsm_srvmtofh(&dnsfh); nfsm_srvnamesiz(len); error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); nfsm_srvpostop_attr(getret, &at); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); return (0); } if (vp->v_type == VDIR) { error = EPERM; goto out1; } nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = CREATE; nd.ni_cnd.cn_flags = LOCKPARENT; error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp && v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); } if (error) goto out1; xp = nd.ni_vp; if (xp != NULL) { error = EEXIST; goto out; } xp = nd.ni_dvp; if (vp->v_mount != xp->v_mount) error = EXDEV; out: if (!error) { nqsrv_getl(vp, ND_WRITE); nqsrv_getl(xp, ND_WRITE); error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); if (nd.ni_dvp != nd.ni_vp) VOP_UNLOCK(nd.ni_dvp); vrele(nd.ni_dvp); } else { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vrele(nd.ni_vp); } out1: if (v3) { vn_lock(vp, LK_SHARED | LK_RETRY); getret = VOP_GETATTR(vp, &at, cred); VOP_UNLOCK(vp); } if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } vrele(dirp); } vrele(vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); if (v3) { nfsm_srvpostop_attr(getret, &at); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); return (0); } nfsm_srvdone; } /* * nfs symbolic link service */ int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vattr va, dirfor, diraft; struct nameidata nd; u_int32_t *tl; int32_t t1; struct nfsv2_sattr *sp; char *bpos, *pathcp = NULL, *cp2; struct uio io; struct iovec iv; int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; uint32_t len, len2; int v3 = (nfsd->nd_flag & ND_NFSV3); struct mbuf *mb, *mreq __unused; struct vnode *dirp = (struct vnode *)0; nfsrvfh_t nsfh; u_quad_t frev; nd.ni_cnd.cn_nameiop = 0; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = CREATE; nd.ni_cnd.cn_flags = LOCKPARENT; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp && v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); } if (error) goto out; abort = 1; vattr_null(&va); va.va_type = VLNK; if (v3) { va.va_mode = 0; nfsm_srvsattr(&va); nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); len2 = fxdr_unsigned(uint32_t, *tl); if (len2 > PATH_MAX) { /* XXX should check _PC_NO_TRUNC */ error = ENAMETOOLONG; goto abortop; } } else { /* NFSv2 */ nfsm_strsiz(len2, NFS_MAXPATHLEN); } pathcp = malloc(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_rw = UIO_READ; UIO_SETUP_SYSSPACE(&io); nfsm_mtouio(&io, len2); if (!v3) { nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); } *(pathcp + len2) = '\0'; if (nd.ni_vp) { error = EEXIST; abortop: VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vrele(nd.ni_vp); goto out; } nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); if (!error) { if (v3) { vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); if (!error) error = VOP_GETATTR(nd.ni_vp, &va, cred); vput(nd.ni_vp); } else { vrele(nd.ni_vp); } } vput(nd.ni_dvp); out: if (pathcp) free(pathcp, M_TEMP); if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } vrele(dirp); dirp = NULL; } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } abort = 0; nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); if (v3) { if (!error) { nfsm_srvpostop_fh(&nsfh); nfsm_srvpostop_attr(0, &va); } nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); } return (0); nfsmout: if (abort) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vrele(nd.ni_vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } } if (dirp) vrele(dirp); if (pathcp) free(pathcp, M_TEMP); return (error); } /* * nfs mkdir service */ int nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vattr va, dirfor, diraft; struct nfs_fattr *fp; struct nameidata nd; char *cp; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; int abort = 0; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp, *dirp = (struct vnode *)0; nfsrvfh_t nsfh; u_quad_t frev; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = CREATE; nd.ni_cnd.cn_flags = LOCKPARENT; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp && v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); } if (error) { if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } nfsm_reply(NFSX_WCCDATA(v3)); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); if (dirp) vrele(dirp); return (0); } abort = 1; vattr_null(&va); if (v3) { va.va_mode = 0; nfsm_srvsattr(&va); } else { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); va.va_mode = nfstov_mode(*tl++); } va.va_type = VDIR; vp = nd.ni_vp; if (vp != NULL) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(vp); error = EEXIST; goto out; } nqsrv_getl(nd.ni_dvp, ND_WRITE); error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); if (!error) { vp = nd.ni_vp; vn_lock(vp, LK_SHARED | LK_RETRY); error = nfsrv_composefh(vp, &nsfh, v3); if (!error) error = VOP_GETATTR(vp, &va, cred); vput(vp); } vput(nd.ni_dvp); out: if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } vrele(dirp); dirp = NULL; } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } abort = 0; nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); if (v3) { if (!error) { nfsm_srvpostop_fh(&nsfh); nfsm_srvpostop_attr(0, &va); } nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); } else { nfsm_srvfhtom(&nsfh, v3); nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); nfsm_srvfillattr(&va, fp); } return (0); nfsmout: if (abort) { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vrele(nd.ni_vp); if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } } if (dirp) vrele(dirp); return (error); } /* * nfs rmdir service */ int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp, *dirp = (struct vnode *)0; struct vattr dirfor, diraft; nfsrvfh_t nsfh; struct nameidata nd; u_quad_t frev; nfsm_srvmtofh(&nsfh); nfsm_srvnamesiz(len); nd.ni_cnd.cn_cred = cred; nd.ni_cnd.cn_nameiop = DELETE; nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); if (dirp && v3) { dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); } if (error) { if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } nfsm_reply(NFSX_WCCDATA(v3)); nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); if (dirp) vrele(dirp); return (0); } vp = nd.ni_vp; if (vp->v_type != VDIR) { error = ENOTDIR; goto out; } /* * No rmdir "." please. */ if (nd.ni_dvp == vp) { error = EINVAL; goto out; } /* * The root of a mounted filesystem cannot be deleted. */ if (vp->v_vflag & VV_ROOT) error = EBUSY; out: if (!error) { nqsrv_getl(nd.ni_dvp, ND_WRITE); nqsrv_getl(vp, ND_WRITE); error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); vput(nd.ni_dvp); } else { VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vput(vp); } if (nd.ni_pathbuf != NULL) { pathbuf_destroy(nd.ni_pathbuf); nd.ni_pathbuf = NULL; } if (dirp) { if (v3) { vn_lock(dirp, LK_SHARED | LK_RETRY); diraft_ret = VOP_GETATTR(dirp, &diraft, cred); VOP_UNLOCK(dirp); } vrele(dirp); } nfsm_reply(NFSX_WCCDATA(v3)); if (v3) { nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); return (0); } nfsm_srvdone; } /* * nfs readdir service * - mallocs what it thinks is enough to read * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= 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'. * - it trims out records with d_type == DT_WHT * these cannot be seen through NFS (unless we extend the protocol) * 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. */ #define NFS_SRVDIRBLKSIZ 1024 struct flrep { nfsuint64 fl_off; u_int32_t fl_postopok; struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ u_int32_t fl_fhok; u_int32_t fl_fhsize; /* handle comes here, filled in dynamically */ }; int nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; char *bp, *be; struct mbuf *mp; struct dirent *dp; char *cp; u_int32_t *tl; int32_t t1; char *bpos; struct mbuf *mb, *mreq __unused, *mp2; char *cpos, *cend, *cp2, *rbuf; struct vnode *vp; struct vattr at; nfsrvfh_t nsfh; struct uio io; struct iovec iv; int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; int v3 = (nfsd->nd_flag & ND_NFSV3); u_quad_t frev, off, toff; #ifdef NFS3_STRICTVERF u_quad_t verf; #endif off_t *cookies = NULL, *cookiep; nfsuint64 jar; nfsm_srvmtofh(&nsfh); if (v3) { nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); toff = fxdr_hyper(tl); tl += 2; #ifdef NFS3_STRICTVERF verf = fxdr_hyper(tl); #endif tl += 2; } else { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); toff = fxdr_unsigned(u_quad_t, *tl++); } off = toff; cnt = fxdr_unsigned(int, *tl); siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); xfer = NFS_SRVMAXDATA(nfsd); if (siz > xfer) siz = xfer; fullsiz = siz; error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (!error && vp->v_type != VDIR) { error = ENOTDIR; vput(vp); } if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); return (0); } nqsrv_getl(vp, ND_READ); if (v3) { error = getret = VOP_GETATTR(vp, &at, cred); #ifdef NFS3_STRICTVERF /* * XXX This check is too strict for Solaris 2.5 clients. */ if (!error && toff && verf != at.va_filerev) error = NFSERR_BAD_COOKIE; #endif } if (!error) error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); if (error) { vput(vp); nfsm_reply(NFSX_POSTOPATTR(v3)); nfsm_srvpostop_attr(getret, &at); return (0); } VOP_UNLOCK(vp); rbuf = malloc(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_rw = UIO_READ; UIO_SETUP_SYSSPACE(&io); eofflag = 0; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); off = (off_t)io.uio_offset; if (!cookies && !error) error = NFSERR_PERM; if (v3) { getret = VOP_GETATTR(vp, &at, cred); if (!error) error = getret; } VOP_UNLOCK(vp); if (error) { vrele(vp); free((void *)rbuf, M_TEMP); if (cookies) free((void *)cookies, M_TEMP); nfsm_reply(NFSX_POSTOPATTR(v3)); nfsm_srvpostop_attr(getret, &at); return (0); } if (io.uio_resid) { siz -= io.uio_resid; /* * If nothing read, return eof * rpc reply */ if (siz == 0) { vrele(vp); nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2 * NFSX_UNSIGNED); if (v3) { nfsm_srvpostop_attr(getret, &at); nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); tl += 2; } else nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); *tl++ = nfs_false; *tl = nfs_true; free((void *)rbuf, M_TEMP); free((void *)cookies, M_TEMP); return (0); } } /* * Check for degenerate cases of nothing useful read. * If so go try again */ cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; cookiep = cookies; while (cpos < cend && ncookies > 0 && (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { cpos += dp->d_reclen; dp = (struct dirent *)cpos; cookiep++; ncookies--; } if (cpos >= cend || ncookies == 0) { toff = off; siz = fullsiz; free(cookies, M_TEMP); cookies = NULL; goto again; } len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); if (v3) { nfsm_srvpostop_attr(getret, &at); nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); } mp = mp2 = mb; bp = bpos; be = bp + M_TRAILINGSPACE(mp); /* Loop through the records and build reply */ while (cpos < cend && ncookies > 0) { if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { nlen = dp->d_namlen; rem = nfsm_rndup(nlen)-nlen; len += (4 * NFSX_UNSIGNED + nlen + rem); if (v3) len += 2 * NFSX_UNSIGNED; if (len > cnt) { eofflag = 0; break; } /* * Build the directory record xdr from * the dirent entry. */ nfsm_clget; *tl = nfs_true; bp += NFSX_UNSIGNED; if (v3) { nfsm_clget; *tl = txdr_unsigned(dp->d_fileno >> 32); bp += NFSX_UNSIGNED; } nfsm_clget; *tl = txdr_unsigned(dp->d_fileno); bp += NFSX_UNSIGNED; nfsm_clget; *tl = txdr_unsigned(nlen); bp += NFSX_UNSIGNED; /* And loop around copying the name */ xfer = nlen; cp = dp->d_name; while (xfer > 0) { nfsm_clget; if ((bp+xfer) > be) tsiz = be-bp; else tsiz = xfer; memcpy(bp, cp, tsiz); bp += tsiz; xfer -= tsiz; if (xfer > 0) cp += tsiz; } /* And null pad to an int32_t boundary */ for (i = 0; i < rem; i++) *bp++ = '\0'; nfsm_clget; /* Finish off the record */ txdr_hyper(*cookiep, &jar); if (v3) { *tl = jar.nfsuquad[0]; bp += NFSX_UNSIGNED; nfsm_clget; } *tl = jar.nfsuquad[1]; bp += NFSX_UNSIGNED; } cpos += dp->d_reclen; dp = (struct dirent *)cpos; cookiep++; ncookies--; } vrele(vp); nfsm_clget; *tl = nfs_false; bp += NFSX_UNSIGNED; nfsm_clget; if (eofflag) *tl = nfs_true; else *tl = nfs_false; bp += NFSX_UNSIGNED; if (mp != mb) { if (bp < be) mp->m_len = bp - mtod(mp, char *); } else mp->m_len += bp - bpos; free((void *)rbuf, M_TEMP); free((void *)cookies, M_TEMP); nfsm_srvdone; } int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; char *bp, *be; struct mbuf *mp; struct dirent *dp; char *cp; u_int32_t *tl; int32_t t1; char *bpos; struct mbuf *mb, *mreq __unused, *mp2; char *cpos, *cend, *cp2, *rbuf; struct vnode *vp, *nvp; struct flrep fl; nfsrvfh_t nsfh; 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, cache = 0, dirlen, ncookies; u_quad_t frev, off, toff; #ifdef NFS3_STRICTVERF u_quad_t verf; #endif off_t *cookies = NULL, *cookiep; nfsm_srvmtofh(&nsfh); nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); toff = fxdr_hyper(tl); tl += 2; #ifdef NFS3_STRICTVERF verf = fxdr_hyper(tl); #endif tl += 2; siz = fxdr_unsigned(int, *tl++); cnt = fxdr_unsigned(int, *tl); off = toff; siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); xfer = NFS_SRVMAXDATA(nfsd); if (siz > xfer) siz = xfer; fullsiz = siz; error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (!error && vp->v_type != VDIR) { error = ENOTDIR; vput(vp); } if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); return (0); } error = getret = VOP_GETATTR(vp, &at, cred); #ifdef NFS3_STRICTVERF /* * XXX This check is too strict for Solaris 2.5 clients. */ if (!error && toff && verf != at.va_filerev) error = NFSERR_BAD_COOKIE; #endif if (!error) { nqsrv_getl(vp, ND_READ); error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); } if (error) { vput(vp); nfsm_reply(NFSX_V3POSTOPATTR); nfsm_srvpostop_attr(getret, &at); return (0); } VOP_UNLOCK(vp); rbuf = malloc(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_rw = UIO_READ; UIO_SETUP_SYSSPACE(&io); eofflag = 0; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); off = (u_quad_t)io.uio_offset; getret = VOP_GETATTR(vp, &at, cred); VOP_UNLOCK(vp); /* * If the VGET operation doesn't work for this filesystem, * we can't support readdirplus. Returning NOTSUPP should * make clients fall back to plain readdir. * There's no need to check for VPTOFH as well, we wouldn't * even be here otherwise. */ if (!getret) { if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) getret = (getret == EOPNOTSUPP) ? NFSERR_NOTSUPP : NFSERR_IO; else vput(nvp); } if (!cookies && !error) error = NFSERR_PERM; if (!error) error = getret; if (error) { vrele(vp); if (cookies) free((void *)cookies, M_TEMP); free((void *)rbuf, M_TEMP); nfsm_reply(NFSX_V3POSTOPATTR); nfsm_srvpostop_attr(getret, &at); return (0); } if (io.uio_resid) { siz -= io.uio_resid; /* * If nothing read, return eof * rpc reply */ if (siz == 0) { vrele(vp); nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); tl += 2; *tl++ = nfs_false; *tl = nfs_true; free((void *)cookies, M_TEMP); free((void *)rbuf, M_TEMP); return (0); } } /* * Check for degenerate cases of nothing useful read. * If so go try again */ cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; cookiep = cookies; while (cpos < cend && ncookies > 0 && (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { cpos += dp->d_reclen; dp = (struct dirent *)cpos; cookiep++; ncookies--; } if (cpos >= cend || ncookies == 0) { toff = off; siz = fullsiz; free(cookies, M_TEMP); cookies = NULL; goto again; } dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; nfsm_reply(cnt); nfsm_srvpostop_attr(getret, &at); nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); txdr_hyper(at.va_filerev, tl); mp = mp2 = mb; bp = bpos; be = bp + M_TRAILINGSPACE(mp); /* Loop through the records and build reply */ while (cpos < cend && ncookies > 0) { if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { nfsrvfh_t nnsfh; 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, dp->d_fileno, &nvp)) goto invalid; if (nfsrv_composefh(nvp, &nnsfh, true)) { vput(nvp); goto invalid; } if (VOP_GETATTR(nvp, vap, cred)) { vput(nvp); goto invalid; } vput(nvp); /* * 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_srvfillattr(vap, fp); fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); fl.fl_fhok = nfs_true; fl.fl_postopok = nfs_true; txdr_hyper(*cookiep, fl.fl_off.nfsuquad); nfsm_clget; *tl = nfs_true; bp += NFSX_UNSIGNED; nfsm_clget; *tl = txdr_unsigned(dp->d_fileno >> 32); bp += NFSX_UNSIGNED; nfsm_clget; *tl = txdr_unsigned(dp->d_fileno); bp += NFSX_UNSIGNED; nfsm_clget; *tl = txdr_unsigned(nlen); bp += NFSX_UNSIGNED; /* And loop around copying the name */ xfer = nlen; cp = dp->d_name; while (xfer > 0) { nfsm_clget; if ((bp + xfer) > be) tsiz = be - bp; else tsiz = xfer; memcpy(bp, cp, tsiz); bp += tsiz; xfer -= tsiz; if (xfer > 0) cp += tsiz; } /* And null pad to an int32_t boundary */ for (i = 0; i < rem; i++) *bp++ = '\0'; /* * Now copy the flrep structure out. */ xfer = sizeof(struct flrep); cp = (void *)&fl; while (xfer > 0) { nfsm_clget; if ((bp + xfer) > be) tsiz = be - bp; else tsiz = xfer; memcpy(bp, cp, tsiz); bp += tsiz; xfer -= tsiz; if (xfer > 0) cp += tsiz; } /* * ... and filehandle. */ xfer = NFSRVFH_SIZE(&nnsfh); cp = NFSRVFH_DATA(&nnsfh); while (xfer > 0) { nfsm_clget; if ((bp + xfer) > be) tsiz = be - bp; else tsiz = xfer; memcpy(bp, cp, tsiz); bp += tsiz; xfer -= tsiz; if (xfer > 0) cp += tsiz; } } invalid: cpos += dp->d_reclen; dp = (struct dirent *)cpos; cookiep++; ncookies--; } vrele(vp); nfsm_clget; *tl = nfs_false; bp += NFSX_UNSIGNED; nfsm_clget; if (eofflag) *tl = nfs_true; else *tl = nfs_false; bp += NFSX_UNSIGNED; if (mp != mb) { if (bp < be) mp->m_len = bp - mtod(mp, char *); } else mp->m_len += bp - bpos; free((void *)cookies, M_TEMP); free((void *)rbuf, M_TEMP); nfsm_srvdone; } /* * nfs commit service */ int nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct vattr bfor, aft; struct vnode *vp; nfsrvfh_t nsfh; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; uint32_t cnt; char *cp2; struct mbuf *mb, *mreq __unused; u_quad_t frev, off, end; nfsm_srvmtofh(&nsfh); nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); off = fxdr_hyper(tl); tl += 2; cnt = fxdr_unsigned(uint32_t, *tl); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(2 * NFSX_UNSIGNED); nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); return (0); } for_ret = VOP_GETATTR(vp, &bfor, cred); end = (cnt > 0) ? off + cnt : vp->v_size; if (end < off || end > vp->v_size) end = vp->v_size; if (off < vp->v_size) error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); /* else error == 0, from nfsrv_fhtovp() */ aft_ret = VOP_GETATTR(vp, &aft, cred); vput(vp); nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); if (!error) { nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); *tl++ = txdr_unsigned(boottime.tv_sec); *tl = txdr_unsigned(boottime.tv_nsec / 1000); } else { return (0); } nfsm_srvdone; } /* * nfs statfs service */ int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; struct statvfs *sf = NULL; struct nfs_statfs *sfp; u_int32_t *tl; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, getret = 1; int v3 = (nfsd->nd_flag & ND_NFSV3); char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp; struct vattr at; nfsrvfh_t nsfh; u_quad_t frev, tval; nfsm_srvmtofh(&nsfh); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); return (0); } sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); error = VFS_STATVFS(vp->v_mount, sf); getret = VOP_GETATTR(vp, &at, cred); vput(vp); nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); if (v3) nfsm_srvpostop_attr(getret, &at); if (error) { free(sf, M_TEMP); return (0); } nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); if (v3) { tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); txdr_hyper(tval, &sfp->sf_tbytes); tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); txdr_hyper(tval, &sfp->sf_fbytes); tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); txdr_hyper(tval, &sfp->sf_abytes); tval = (u_quad_t)sf->f_files; txdr_hyper(tval, &sfp->sf_tfiles); tval = (u_quad_t)sf->f_ffree; txdr_hyper(tval, &sfp->sf_ffiles); txdr_hyper(tval, &sfp->sf_afiles); sfp->sf_invarsec = 0; } else { sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 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: if (sf) free(sf, M_TEMP); return error; } /* * nfs fsinfo service */ int nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; u_int32_t *tl; struct nfsv3_fsinfo *sip; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, getret = 1; uint32_t maxdata; char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp; struct vattr at; nfsrvfh_t nsfh; u_quad_t frev, maxfsize; struct statvfs *sb; nfsm_srvmtofh(&nsfh); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); return (0); } /* XXX Try to make a guess on the max file size. */ sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); VFS_STATVFS(vp->v_mount, sb); maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; free(sb, M_TEMP); getret = VOP_GETATTR(vp, &at, cred); vput(vp); nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); nfsm_srvpostop_attr(getret, &at); nfsm_build(sip, struct nfsv3_fsinfo *, 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) maxdata = NFS_MAXDGRAMDATA; else maxdata = NFS_MAXDATA; sip->fs_rtmax = txdr_unsigned(maxdata); sip->fs_rtpref = txdr_unsigned(maxdata); sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); sip->fs_wtmax = txdr_unsigned(maxdata); sip->fs_wtpref = txdr_unsigned(maxdata); sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); sip->fs_dtpref = txdr_unsigned(maxdata); 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); nfsm_srvdone; } /* * nfs pathconf service */ int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; struct mbuf *nam = nfsd->nd_nam; char *dpos = nfsd->nd_dpos; kauth_cred_t cred = nfsd->nd_cr; u_int32_t *tl; struct nfsv3_pathconf *pc; int32_t t1; char *bpos; int error = 0, rdonly, cache = 0, getret = 1; register_t linkmax, namemax, chownres, notrunc; char *cp2; struct mbuf *mb, *mreq __unused; struct vnode *vp; struct vattr at; nfsrvfh_t nsfh; u_quad_t frev; nfsm_srvmtofh(&nsfh); error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); if (error) { nfsm_reply(NFSX_UNSIGNED); nfsm_srvpostop_attr(getret, &at); return (0); } 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, cred); vput(vp); nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); nfsm_srvpostop_attr(getret, &at); if (error) return (0); nfsm_build(pc, struct nfsv3_pathconf *, 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; nfsm_srvdone; } /* * Null operation, used by clients to ping server */ /* ARGSUSED */ int nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep; char *bpos; int error = NFSERR_RETVOID, cache = 0; struct mbuf *mb, *mreq __unused; u_quad_t frev; nfsm_reply(0); nfsmout: return (0); } /* * No operation, used for obsolete procedures */ /* ARGSUSED */ int nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) { struct mbuf *mrep = nfsd->nd_mrep; char *bpos; int error, cache = 0; struct mbuf *mb, *mreq __unused; u_quad_t frev; if (nfsd->nd_repstat) error = nfsd->nd_repstat; else error = EPROCUNAVAIL; nfsm_reply(0); nfsmout: return (0); } /* * 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 EACCES. EPERM is always an error. */ int nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) { struct vattr vattr; int error; 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 || (vp->v_mount->mnt_flag & MNT_RDONLY)) { switch (vp->v_type) { case VREG: case VDIR: case VLNK: return (EROFS); default: break; } } /* * If the vnode is in use as a process's text, * we can't allow writing. */ if (vp->v_iflag & VI_TEXT) return (ETXTBSY); } error = VOP_GETATTR(vp, &vattr, cred); if (error) return (error); error = VOP_ACCESS(vp, flags, cred); /* * Allow certain operations for the owner (reads and writes * on files that are already open). */ if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) error = 0; return error; }