From d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c Mon Sep 17 00:00:00 2001 From: Theo de Raadt Date: Wed, 18 Oct 1995 08:53:40 +0000 Subject: initial import of NetBSD tree --- sys/nfs/nfs_serv.c | 1902 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1902 insertions(+) create mode 100644 sys/nfs/nfs_serv.c (limited to 'sys/nfs/nfs_serv.c') diff --git a/sys/nfs/nfs_serv.c b/sys/nfs/nfs_serv.c new file mode 100644 index 00000000000..44daa8a30b7 --- /dev/null +++ b/sys/nfs/nfs_serv.c @@ -0,0 +1,1902 @@ +/* $NetBSD: nfs_serv.c,v 1.18 1995/05/23 06:22:47 mycroft 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)nfs_serv.c 8.4 (Berkeley) 6/4/94 + */ + +/* + * nfs version 2 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include +#include + +/* Defs */ +#define TRUE 1 +#define FALSE 0 + +/* Global vars */ +extern u_long nfs_procids[NFS_NPROCS]; +extern u_long nfs_xdrneg1; +extern u_long nfs_false, nfs_true; +nfstype nfs_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, + NFCHR, NFNON }; + +/* + * nqnfs access service + */ +nqnfsrv_access(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, mode = 0; + char *cp2; + struct mbuf *mb, *mreq; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + if (*tl++ == nfs_true) + mode |= VREAD; + if (*tl++ == nfs_true) + mode |= VWRITE; + if (*tl == nfs_true) + mode |= VEXEC; + error = nfsrv_access(vp, mode, cred, rdonly, nfsd->nd_procp); + vput(vp); + nfsm_reply(0); + nfsm_srvdone; +} + +/* + * nfs getattr service + */ +nfsrv_getattr(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct nfsv2_fattr *fp; + struct vattr va; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + nqsrv_getl(vp, NQL_READ); + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + nfsm_srvdone; +} + +/* + * nfs setattr service + */ +nfsrv_setattr(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct vattr va; + register struct nfsv2_sattr *sp; + register struct nfsv2_fattr *fp; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + u_quad_t frev, frev2; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + nqsrv_getl(vp, NQL_WRITE); + VATTR_NULL(&va); + /* + * 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 (nfsd->nd_nqlflag == NQL_NOVAL) { + if (sp->sa_nfssize != nfs_xdrneg1) + va.va_size = fxdr_unsigned(u_quad_t, sp->sa_nfssize); + if (sp->sa_nfsatime.nfs_sec != nfs_xdrneg1) { +#ifdef notyet + fxdr_nfstime(&sp->sa_nfsatime, &va.va_atime); +#else + va.va_atime.ts_sec = + fxdr_unsigned(long, sp->sa_nfsatime.nfs_sec); + va.va_atime.ts_nsec = 0; +#endif + } + if (sp->sa_nfsmtime.nfs_sec != nfs_xdrneg1) + fxdr_nfstime(&sp->sa_nfsmtime, &va.va_mtime); + } else { + fxdr_hyper(&sp->sa_nqsize, &va.va_size); + fxdr_nqtime(&sp->sa_nqatime, &va.va_atime); + fxdr_nqtime(&sp->sa_nqmtime, &va.va_mtime); + va.va_flags = fxdr_unsigned(u_long, sp->sa_nqflags); + } + + /* + * 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, + nfsd->nd_procp)) + goto out; + } + if (error = VOP_SETATTR(vp, &va, cred, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); +out: + vput(vp); + nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 2*NFSX_UNSIGNED); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + if (nfsd->nd_nqlflag != NQL_NOVAL) { + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + txdr_hyper(&frev2, tl); + } + nfsm_srvdone; +} + +/* + * nfs lookup rpc + */ +nfsrv_lookup(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct nfsv2_fattr *fp; + struct nameidata nd; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + register caddr_t cp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, cache, duration2, cache2, len; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct vattr va; + u_quad_t frev, frev2; + + fhp = &nfh.fh_generic; + duration2 = 0; + if (nfsd->nd_nqlflag != NQL_NOVAL) { + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + duration2 = fxdr_unsigned(int, *tl); + } + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = LOOKUP; + nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + nfsm_reply(0); + nqsrv_getl(nd.ni_startdir, NQL_READ); + vrele(nd.ni_startdir); + FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); + vp = nd.ni_vp; + bzero((caddr_t)fhp, sizeof(nfh)); + fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; + if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { + vput(vp); + nfsm_reply(0); + } + if (duration2) + (void) nqsrv_getlease(vp, &duration2, NQL_READ, nfsd, + nam, &cache2, &frev2, cred); + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_FH + NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 5*NFSX_UNSIGNED); + if (nfsd->nd_nqlflag != NQL_NOVAL) { + if (duration2) { + nfsm_build(tl, u_long *, 5*NFSX_UNSIGNED); + *tl++ = txdr_unsigned(NQL_READ); + *tl++ = txdr_unsigned(cache2); + *tl++ = txdr_unsigned(duration2); + txdr_hyper(&frev2, tl); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = 0; + } + } + nfsm_srvfhtom(fhp); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + nfsm_srvdone; +} + +/* + * nfs readlink service + */ +nfsrv_readlink(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; + register struct iovec *ivp = iv; + register struct mbuf *mp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, i, tlen, len; + char *cp2; + struct mbuf *mb, *mb2, *mp2, *mp3, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct uio io, *uiop = &io; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + len = 0; + i = 0; + while (len < NFS_MAXPATHLEN) { + MGET(mp, M_WAIT, MT_DATA); + MCLGET(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, caddr_t); + 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; + uiop->uio_segflg = UIO_SYSSPACE; + uiop->uio_procp = (struct proc *)0; + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) { + m_freem(mp3); + nfsm_reply(0); + } + if (vp->v_type != VLNK) { + error = EINVAL; + goto out; + } + nqsrv_getl(vp, NQL_READ); + error = VOP_READLINK(vp, uiop, cred); +out: + vput(vp); + if (error) + m_freem(mp3); + nfsm_reply(NFSX_UNSIGNED); + if (uiop->uio_resid > 0) { + len -= uiop->uio_resid; + tlen = nfsm_rndup(len); + nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); + } + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = txdr_unsigned(len); + mb->m_next = mp3; + nfsm_srvdone; +} + +/* + * nfs read service + */ +nfsrv_read(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct iovec *iv; + struct iovec *iv2; + register struct mbuf *m; + register struct nfsv2_fattr *fp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, i, cnt, len, left, siz, tlen; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct mbuf *m2; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct uio io, *uiop = &io; + struct vattr va; + off_t off; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + if (nfsd->nd_nqlflag == NQL_NOVAL) { + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + off = (off_t)fxdr_unsigned(u_long, *tl); + } else { + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); + fxdr_hyper(tl, &off); + } + nfsm_srvstrsiz(cnt, NFS_MAXDATA); + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + if (vp->v_type != VREG) { + error = (vp->v_type == VDIR) ? EISDIR : EACCES; + vput(vp); + nfsm_reply(0); + } + nqsrv_getl(vp, NQL_READ); + if ((error = nfsrv_access(vp, VREAD, cred, rdonly, nfsd->nd_procp)) && + (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp))) { + vput(vp); + nfsm_reply(0); + } + if (error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + if (off >= va.va_size) + cnt = 0; + else if ((off + cnt) > va.va_size) + cnt = nfsm_rndup(va.va_size - off); + nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)+NFSX_UNSIGNED+nfsm_rndup(cnt)); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + len = left = cnt; + if (cnt > 0) { + /* + * Generate the mbuf list with the uio_iov ref. to it. + */ + i = 0; + m = m2 = mb; + MALLOC(iv, struct iovec *, + ((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec), + M_TEMP, M_WAITOK); + iv2 = iv; + while (left > 0) { + siz = min(M_TRAILINGSPACE(m), left); + if (siz > 0) { + m->m_len += siz; + iv->iov_base = bpos; + iv->iov_len = siz; + iv++; + i++; + left -= siz; + } + if (left > 0) { + MGET(m, M_WAIT, MT_DATA); + MCLGET(m, M_WAIT); + m->m_len = 0; + m2->m_next = m; + m2 = m; + bpos = mtod(m, caddr_t); + } + } + uiop->uio_iov = iv2; + uiop->uio_iovcnt = i; + uiop->uio_offset = off; + uiop->uio_resid = cnt; + uiop->uio_rw = UIO_READ; + uiop->uio_segflg = UIO_SYSSPACE; + error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); + off = uiop->uio_offset; + FREE((caddr_t)iv2, M_TEMP); + if (error || (error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp))) { + m_freem(mreq); + vput(vp); + nfsm_reply(0); + } + } else + uiop->uio_resid = 0; + vput(vp); + nfsm_srvfillattr; + len -= uiop->uio_resid; + tlen = nfsm_rndup(len); + if (cnt != tlen || tlen != len) + nfsm_adj(mb, cnt-tlen, tlen-len); + *tl = txdr_unsigned(len); + nfsm_srvdone; +} + +/* + * nfs write service + */ +nfsrv_write(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct iovec *ivp; + register struct mbuf *mp; + register struct nfsv2_fattr *fp; + struct iovec iv[NFS_MAXIOVEC]; + struct vattr va; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, siz, len, xfer; + int ioflags = IO_SYNC | IO_NODELOCKED; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct uio io, *uiop = &io; + off_t off; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED); + if (nfsd->nd_nqlflag == NQL_NOVAL) { + off = (off_t)fxdr_unsigned(u_long, *++tl); + tl += 2; + } else { + fxdr_hyper(tl, &off); + tl += 2; + if (fxdr_unsigned(u_long, *tl++)) + ioflags |= IO_APPEND; + } + len = fxdr_unsigned(long, *tl); + if (len > NFS_MAXDATA || len <= 0) { + error = EBADRPC; + nfsm_reply(0); + } + if (dpos == (mtod(md, caddr_t)+md->m_len)) { + mp = md->m_next; + if (mp == NULL) { + error = EBADRPC; + nfsm_reply(0); + } + } else { + mp = md; + siz = dpos-mtod(mp, caddr_t); + mp->m_len -= siz; + NFSMADV(mp, siz); + } + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + if (vp->v_type != VREG) { + error = (vp->v_type == VDIR) ? EISDIR : EACCES; + vput(vp); + nfsm_reply(0); + } + nqsrv_getl(vp, NQL_WRITE); + if (error = nfsrv_access(vp, VWRITE, cred, rdonly, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + uiop->uio_resid = 0; + uiop->uio_rw = UIO_WRITE; + uiop->uio_segflg = UIO_SYSSPACE; + uiop->uio_procp = (struct proc *)0; + /* + * Do up to NFS_MAXIOVEC mbufs of write each iteration of the + * loop until done. + */ + while (len > 0 && uiop->uio_resid == 0) { + ivp = iv; + siz = 0; + uiop->uio_iov = ivp; + uiop->uio_iovcnt = 0; + uiop->uio_offset = off; + while (len > 0 && uiop->uio_iovcnt < NFS_MAXIOVEC && mp != NULL) { + ivp->iov_base = mtod(mp, caddr_t); + if (len < mp->m_len) + ivp->iov_len = xfer = len; + else + ivp->iov_len = xfer = mp->m_len; +#ifdef notdef + /* Not Yet .. */ + if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0) + ivp->iov_op = NULL; /* what should it be ?? */ + else + ivp->iov_op = NULL; +#endif + uiop->uio_iovcnt++; + ivp++; + len -= xfer; + siz += xfer; + mp = mp->m_next; + } + if (len > 0 && mp == NULL) { + error = EBADRPC; + vput(vp); + nfsm_reply(0); + } + uiop->uio_resid = siz; + if (error = VOP_WRITE(vp, uiop, ioflags, cred)) { + vput(vp); + nfsm_reply(0); + } + off = uiop->uio_offset; + } + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + if (nfsd->nd_nqlflag != NQL_NOVAL) { + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + txdr_hyper(&va.va_filerev, tl); + } + nfsm_srvdone; +} + +/* + * nfs create service + * now does a truncate to 0 length via. setattr if it already exists + */ +nfsrv_create(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct nfsv2_fattr *fp; + struct vattr va; + register struct nfsv2_sattr *sp; + register u_long *tl; + struct nameidata nd; + register caddr_t cp; + register long t1; + caddr_t bpos; + int error = 0, rdev, cache, len, tsize; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + u_quad_t frev; + + nd.ni_cnd.cn_nameiop = 0; + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = CREATE; + nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + nfsm_reply(0); + VATTR_NULL(&va); + nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + /* + * Iff doesn't exist, create it + * otherwise just truncate to 0 length + * should I set the mode too ?? + */ + if (nd.ni_vp == NULL) { + va.va_type = IFTOVT(fxdr_unsigned(u_long, sp->sa_mode)); + if (va.va_type == VNON) + va.va_type = VREG; + va.va_mode = nfstov_mode(sp->sa_mode); + if (nfsd->nd_nqlflag == NQL_NOVAL) + rdev = fxdr_unsigned(long, sp->sa_nfssize); + else + rdev = fxdr_unsigned(long, sp->sa_nqrdev); + if (va.va_type == VREG || va.va_type == VSOCK) { + vrele(nd.ni_startdir); + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + if (error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va)) + nfsm_reply(0); + FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); + } 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) { +#ifndef FIFO + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + vput(nd.ni_dvp); + error = ENXIO; + goto out; +#endif /* FIFO */ + } else if (error = suser(cred, (u_short *)0)) { + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + vput(nd.ni_dvp); + goto out; + } else + va.va_rdev = (dev_t)rdev; + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + if (error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va)) { + vrele(nd.ni_startdir); + nfsm_reply(0); + } + nd.ni_cnd.cn_nameiop = LOOKUP; + nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); + nd.ni_cnd.cn_proc = nfsd->nd_procp; + nd.ni_cnd.cn_cred = nfsd->nd_procp->p_ucred; + if (error = lookup(&nd)) { + free(nd.ni_cnd.cn_pnbuf, M_NAMEI); + nfsm_reply(0); + } + FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); + if (nd.ni_cnd.cn_flags & ISSYMLINK) { + vrele(nd.ni_dvp); + vput(nd.ni_vp); + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + error = EINVAL; + nfsm_reply(0); + } + } else { + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + vput(nd.ni_dvp); + error = ENXIO; + goto out; + } + vp = nd.ni_vp; + } else { + vrele(nd.ni_startdir); + free(nd.ni_cnd.cn_pnbuf, M_NAMEI); + vp = nd.ni_vp; + if (nd.ni_dvp == vp) + vrele(nd.ni_dvp); + else + vput(nd.ni_dvp); + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + if (nfsd->nd_nqlflag == NQL_NOVAL) { + tsize = fxdr_unsigned(long, sp->sa_nfssize); + if (tsize != -1) + va.va_size = (u_quad_t)tsize; + else + va.va_size = -1; + } else + fxdr_hyper(&sp->sa_nqsize, &va.va_size); + if (va.va_size != -1) { + if (error = nfsrv_access(vp, VWRITE, cred, + (nd.ni_cnd.cn_flags & RDONLY), nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + nqsrv_getl(vp, NQL_WRITE); + if (error = VOP_SETATTR(vp, &va, cred, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + } + } + bzero((caddr_t)fhp, sizeof(nfh)); + fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; + if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { + vput(vp); + nfsm_reply(0); + } + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfhtom(fhp); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + return (error); +nfsmout: + if (nd.ni_cnd.cn_nameiop || nd.ni_cnd.cn_flags) + vrele(nd.ni_startdir); + 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); + return (error); + +out: + vrele(nd.ni_startdir); + free(nd.ni_cnd.cn_pnbuf, M_NAMEI); + nfsm_reply(0); +} + +/* + * nfs remove service + */ +nfsrv_remove(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct nameidata nd; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, cache, len; + char *cp2; + struct mbuf *mb, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = DELETE; + nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + nfsm_reply(0); + vp = nd.ni_vp; + if (vp->v_type == VDIR && + (error = suser(cred, (u_short *)0))) + goto out; + /* + * The root of a mounted filesystem cannot be deleted. + */ + if (vp->v_flag & VROOT) { + error = EBUSY; + goto out; + } + if (vp->v_flag & VTEXT) + (void) vnode_pager_uncache(vp); +out: + if (!error) { + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + nqsrv_getl(vp, NQL_WRITE); + error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); + } 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); + } + nfsm_reply(0); + nfsm_srvdone; +} + +/* + * nfs rename service + */ +nfsrv_rename(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, cache, len, len2; + char *cp2; + struct mbuf *mb, *mreq; + struct nameidata fromnd, tond; + struct vnode *fvp, *tvp, *tdvp; + nfsv2fh_t fnfh, tnfh; + fhandle_t *ffhp, *tfhp; + u_quad_t frev; + uid_t saved_uid; + + ffhp = &fnfh.fh_generic; + tfhp = &tnfh.fh_generic; + fromnd.ni_cnd.cn_nameiop = 0; + tond.ni_cnd.cn_nameiop = 0; + nfsm_srvmtofh(ffhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + /* + * Remember our original uid so that we can reset cr_uid before + * the second nfs_namei() call, in case it is remapped. + */ + saved_uid = cred->cr_uid; + fromnd.ni_cnd.cn_cred = cred; + fromnd.ni_cnd.cn_nameiop = DELETE; + fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; + if (error = nfs_namei(&fromnd, ffhp, len, nfsd->nd_slp, nam, &md, + &dpos, nfsd->nd_procp)) + nfsm_reply(0); + fvp = fromnd.ni_vp; + nfsm_srvmtofh(tfhp); + nfsm_strsiz(len2, NFS_MAXNAMLEN); + cred->cr_uid = saved_uid; + tond.ni_cnd.cn_cred = cred; + tond.ni_cnd.cn_nameiop = RENAME; + tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; + if (error = nfs_namei(&tond, tfhp, len2, nfsd->nd_slp, nam, &md, + &dpos, nfsd->nd_procp)) { + 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) { + error = EISDIR; + goto out; + } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { + error = ENOTDIR; + goto out; + } + if (tvp->v_type == VDIR && tvp->v_mountedhere) { + error = EXDEV; + goto out; + } + } + if (fvp->v_type == VDIR && fvp->v_mountedhere) { + error = EBUSY; + goto out; + } + if (fvp->v_mount != tdvp->v_mount) { + error = EXDEV; + goto out; + } + if (fvp == tdvp) + error = EINVAL; + /* + * 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 && + !bcmp(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, NQL_WRITE); + nqsrv_getl(tdvp, NQL_WRITE); + if (tvp) + nqsrv_getl(tvp, NQL_WRITE); + error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, + tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); + } else { + VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); + if (tdvp == tvp) + vrele(tdvp); + else + vput(tdvp); + if (tvp) + vput(tvp); + VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); + vrele(fromnd.ni_dvp); + vrele(fvp); + } + vrele(tond.ni_startdir); + FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); +out1: + vrele(fromnd.ni_startdir); + FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); + nfsm_reply(0); + return (error); + +nfsmout: + if (tond.ni_cnd.cn_nameiop || tond.ni_cnd.cn_flags) { + vrele(tond.ni_startdir); + FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); + } + if (fromnd.ni_cnd.cn_nameiop || fromnd.ni_cnd.cn_flags) { + vrele(fromnd.ni_startdir); + FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); + VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); + vrele(fromnd.ni_dvp); + vrele(fvp); + } + return (error); +} + +/* + * nfs link service + */ +nfsrv_link(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct nameidata nd; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, len; + char *cp2; + struct mbuf *mb, *mreq; + struct vnode *vp, *xp; + nfsv2fh_t nfh, dnfh; + fhandle_t *fhp, *dfhp; + u_quad_t frev; + + fhp = &nfh.fh_generic; + dfhp = &dnfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvmtofh(dfhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0))) + goto out1; + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = CREATE; + nd.ni_cnd.cn_flags = LOCKPARENT; + if (error = nfs_namei(&nd, dfhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + 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, NQL_WRITE); + nqsrv_getl(xp, NQL_WRITE); + error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); + } 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: + vrele(vp); + nfsm_reply(0); + nfsm_srvdone; +} + +/* + * nfs symbolic link service + */ +nfsrv_symlink(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct vattr va; + struct nameidata nd; + register u_long *tl; + register long t1; + struct nfsv2_sattr *sp; + caddr_t bpos; + struct uio io; + struct iovec iv; + int error = 0, cache, len, len2; + char *pathcp, *cp2; + struct mbuf *mb, *mreq; + nfsv2fh_t nfh; + fhandle_t *fhp; + u_quad_t frev; + + pathcp = (char *)0; + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = CREATE; + nd.ni_cnd.cn_flags = LOCKPARENT; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + goto out; + nfsm_strsiz(len2, NFS_MAXPATHLEN); + MALLOC(pathcp, caddr_t, 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_procp = (struct proc *)0; + nfsm_mtouio(&io, len2); + nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + *(pathcp + len2) = '\0'; + if (nd.ni_vp) { + VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); + if (nd.ni_dvp == nd.ni_vp) + vrele(nd.ni_dvp); + else + vput(nd.ni_dvp); + vrele(nd.ni_vp); + error = EEXIST; + goto out; + } + VATTR_NULL(&va); + va.va_mode = fxdr_unsigned(u_short, sp->sa_mode); + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); +out: + if (pathcp) + FREE(pathcp, M_TEMP); + nfsm_reply(0); + return (error); +nfsmout: + 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 (pathcp) + FREE(pathcp, M_TEMP); + return (error); +} + +/* + * nfs mkdir service + */ +nfsrv_mkdir(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + struct vattr va; + register struct nfsv2_fattr *fp; + struct nameidata nd; + register caddr_t cp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, cache, len; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = CREATE; + nd.ni_cnd.cn_flags = LOCKPARENT; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + nfsm_reply(0); + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + VATTR_NULL(&va); + va.va_type = VDIR; + va.va_mode = nfstov_mode(*tl++); + 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; + nfsm_reply(0); + } + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + if (error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va)) + nfsm_reply(0); + vp = nd.ni_vp; + bzero((caddr_t)fhp, sizeof(nfh)); + fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; + if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { + vput(vp); + nfsm_reply(0); + } + error = VOP_GETATTR(vp, &va, cred, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfhtom(fhp); + nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); + nfsm_srvfillattr; + return (error); +nfsmout: + 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); + return (error); +} + +/* + * nfs rmdir service + */ +nfsrv_rmdir(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, cache, len; + char *cp2; + struct mbuf *mb, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct nameidata nd; + u_quad_t frev; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_srvstrsiz(len, NFS_MAXNAMLEN); + nd.ni_cnd.cn_cred = cred; + nd.ni_cnd.cn_nameiop = DELETE; + nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; + if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, + nfsd->nd_procp)) + nfsm_reply(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_flag & VROOT) + error = EBUSY; +out: + if (!error) { + nqsrv_getl(nd.ni_dvp, NQL_WRITE); + nqsrv_getl(vp, NQL_WRITE); + error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); + } 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); + } + nfsm_reply(0); + nfsm_srvdone; +} + +/* + * 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 nqnfsrv_readdirlook() 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 { + u_long fl_cachable; + u_long fl_duration; + u_long fl_frev[2]; + nfsv2fh_t fl_nfh; + u_long fl_fattr[NFSX_NQFATTR / sizeof (u_long)]; +}; + +nfsrv_readdir(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register char *bp, *be; + register struct mbuf *mp; + register struct dirent *dp; + register caddr_t cp; + register u_long *tl; + register long t1; + caddr_t bpos; + struct mbuf *mb, *mb2, *mreq, *mp2; + char *cpos, *cend, *cp2, *rbuf; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct uio io; + struct iovec iv; + int len, nlen, rem, xfer, tsiz, i, error = 0; + int siz, cnt, fullsiz, eofflag, rdonly, cache; + u_quad_t frev; + u_long off, *cookiebuf, *cookie; + int ncookies; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); + off = fxdr_unsigned(u_long, *tl++); + cnt = fxdr_unsigned(int, *tl); + siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); + if (cnt > NFS_MAXREADDIR) + siz = NFS_MAXREADDIR; + fullsiz = siz; + ncookies = siz / 16; /* Guess at the number of cookies needed. */ + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + nqsrv_getl(vp, NQL_READ); + if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + VOP_UNLOCK(vp); + MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); + MALLOC(cookiebuf, u_long *, ncookies * sizeof(*cookiebuf), 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_procp = (struct proc *)0; + error = VOP_READDIR(vp, &io, cred, &eofflag, cookiebuf, ncookies); + cookie = cookiebuf; + off = (off_t)io.uio_offset; + if (error) { + vrele(vp); + free((caddr_t)cookiebuf, M_TEMP); + free((caddr_t)rbuf, M_TEMP); + nfsm_reply(0); + } + if (io.uio_resid) { + siz -= io.uio_resid; + + /* + * If nothing read, return eof + * rpc reply + */ + if (siz == 0) { + vrele(vp); + nfsm_reply(2*NFSX_UNSIGNED); + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + *tl++ = nfs_false; + *tl = nfs_true; + FREE((caddr_t)cookiebuf, M_TEMP); + FREE((caddr_t)rbuf, M_TEMP); + return (0); + } + } + + /* + * Check for degenerate cases of nothing useful read. + * If so go try again + */ + cpos = rbuf; + cend = rbuf + siz; + while (cpos < cend) { + dp = (struct dirent *)cpos; + if (dp->d_fileno == 0) { + cpos += dp->d_reclen; + cookie++; + } else + break; + } + if (cpos >= cend) { + siz = fullsiz; + goto again; + } + + len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ + nfsm_reply(siz); + mp = mp2 = mb; + bp = bpos; + be = bp + M_TRAILINGSPACE(mp); + + /* Loop through the records and build reply */ + while (cpos < cend) { + if (dp->d_fileno != 0) { + nlen = dp->d_namlen; + rem = nfsm_rndup(nlen)-nlen; + len += (4*NFSX_UNSIGNED + nlen + rem); + if (len > cnt) { + eofflag = 0; + break; + } + /* + * Build the directory record xdr from + * the dirent entry. + */ + nfsm_clget; + *tl = nfs_true; + 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; + bcopy(cp, bp, tsiz); + bp += tsiz; + xfer -= tsiz; + if (xfer > 0) + cp += tsiz; + } + /* And null pad to a long boundary */ + for (i = 0; i < rem; i++) + *bp++ = '\0'; + nfsm_clget; + + /* Finish off the record */ + *tl = txdr_unsigned(*cookie); + bp += NFSX_UNSIGNED; + } + cpos += dp->d_reclen; + dp = (struct dirent *)cpos; + cookie++; + } + 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, caddr_t); + } else + mp->m_len += bp - bpos; + FREE(cookiebuf, M_TEMP); + FREE(rbuf, M_TEMP); + nfsm_srvdone; +} + +nqnfsrv_readdirlook(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register char *bp, *be; + register struct mbuf *mp; + register struct dirent *dp; + register caddr_t cp; + register u_long *tl; + register long t1; + caddr_t bpos; + struct mbuf *mb, *mb2, *mreq, *mp2; + char *cpos, *cend, *cp2, *rbuf; + struct vnode *vp, *nvp; + struct flrep fl; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct uio io; + struct iovec iv; + struct vattr va; + struct nfsv2_fattr *fp; + int len, nlen, rem, xfer, tsiz, i, error = 0, duration2, cache2; + int siz, cnt, fullsiz, eofflag, rdonly, cache; + u_quad_t frev, frev2; + u_long off, *cookiebuf, *cookie; + int ncookies; + + fhp = &nfh.fh_generic; + nfsm_srvmtofh(fhp); + nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); + off = fxdr_unsigned(u_long, *tl++); + cnt = fxdr_unsigned(int, *tl++); + duration2 = fxdr_unsigned(int, *tl); + siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); + if (cnt > NFS_MAXREADDIR) + siz = NFS_MAXREADDIR; + fullsiz = siz; + ncookies = siz / 16; /* Guess at the number of cookies needed. */ + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + nqsrv_getl(vp, NQL_READ); + if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) { + vput(vp); + nfsm_reply(0); + } + VOP_UNLOCK(vp); + MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); + MALLOC(cookiebuf, u_long *, ncookies * sizeof(*cookiebuf), 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_procp = (struct proc *)0; + error = VOP_READDIR(vp, &io, cred, &eofflag, cookiebuf, ncookies); + cookie = cookiebuf; + off = (u_long)io.uio_offset; + if (error) { + vrele(vp); + free((caddr_t)cookiebuf, M_TEMP); + free((caddr_t)rbuf, M_TEMP); + nfsm_reply(0); + } + if (io.uio_resid) { + siz -= io.uio_resid; + + /* + * If nothing read, return eof + * rpc reply + */ + if (siz == 0) { + vrele(vp); + nfsm_reply(2 * NFSX_UNSIGNED); + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = nfs_false; + *tl = nfs_true; + FREE((caddr_t)cookiebuf, M_TEMP); + FREE((caddr_t)rbuf, M_TEMP); + return (0); + } + } + + /* + * Check for degenerate cases of nothing useful read. + * If so go try again + */ + cpos = rbuf; + cend = rbuf + siz; + while (cpos < cend) { + dp = (struct dirent *)cpos; + if (dp->d_fileno == 0) { + cpos += dp->d_reclen; + cookie++; + } else + break; + } + if (cpos >= cend) { + siz = fullsiz; + goto again; + } + + len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ + nfsm_reply(siz); + mp = mp2 = mb; + bp = bpos; + be = bp + M_TRAILINGSPACE(mp); + + /* Loop through the records and build reply */ + while (cpos < cend) { + if (dp->d_fileno != 0) { + 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; + bzero((caddr_t)&fl.fl_nfh, sizeof (nfsv2fh_t)); + fl.fl_nfh.fh_generic.fh_fsid = + nvp->v_mount->mnt_stat.f_fsid; + if (VFS_VPTOFH(nvp, &fl.fl_nfh.fh_generic.fh_fid)) { + vput(nvp); + goto invalid; + } + if (duration2) { + (void) nqsrv_getlease(nvp, &duration2, NQL_READ, + nfsd, nam, &cache2, &frev2, cred); + fl.fl_duration = txdr_unsigned(duration2); + fl.fl_cachable = txdr_unsigned(cache2); + txdr_hyper(&frev2, fl.fl_frev); + } else + fl.fl_duration = 0; + if (VOP_GETATTR(nvp, &va, cred, nfsd->nd_procp)) { + vput(nvp); + goto invalid; + } + vput(nvp); + fp = (struct nfsv2_fattr *)&fl.fl_fattr; + nfsm_srvfillattr; + len += (4*NFSX_UNSIGNED + nlen + rem + NFSX_FH + + NFSX_NQFATTR); + if (len > cnt) { + eofflag = 0; + break; + } + /* + * Build the directory record xdr from + * the dirent entry. + */ + nfsm_clget; + *tl = nfs_true; + bp += NFSX_UNSIGNED; + + /* + * For readdir_and_lookup copy the stuff out. + */ + xfer = sizeof (struct flrep); + cp = (caddr_t)&fl; + while (xfer > 0) { + nfsm_clget; + if ((bp+xfer) > be) + tsiz = be-bp; + else + tsiz = xfer; + bcopy(cp, bp, tsiz); + bp += tsiz; + xfer -= tsiz; + if (xfer > 0) + cp += tsiz; + } + 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; + bcopy(cp, bp, tsiz); + bp += tsiz; + xfer -= tsiz; + if (xfer > 0) + cp += tsiz; + } + /* And null pad to a long boundary */ + for (i = 0; i < rem; i++) + *bp++ = '\0'; + nfsm_clget; + + /* Finish off the record */ + *tl = txdr_unsigned(*cookie); + bp += NFSX_UNSIGNED; + } +invalid: + cpos += dp->d_reclen; + dp = (struct dirent *)cpos; + cookie++; + } + 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, caddr_t); + } else + mp->m_len += bp - bpos; + FREE(cookiebuf, M_TEMP); + FREE(rbuf, M_TEMP); + nfsm_srvdone; +} + +/* + * nfs statfs service + */ +nfsrv_statfs(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + register struct statfs *sf; + register struct nfsv2_statfs *sfp; + register u_long *tl; + register long t1; + caddr_t bpos; + int error = 0, rdonly, cache, isnq; + char *cp2; + struct mbuf *mb, *mb2, *mreq; + struct vnode *vp; + nfsv2fh_t nfh; + fhandle_t *fhp; + struct statfs statfs; + u_quad_t frev; + + fhp = &nfh.fh_generic; + isnq = (nfsd->nd_nqlflag != NQL_NOVAL); + nfsm_srvmtofh(fhp); + if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) + nfsm_reply(0); + sf = &statfs; + error = VFS_STATFS(vp->v_mount, sf, nfsd->nd_procp); + vput(vp); + nfsm_reply(NFSX_STATFS(isnq)); + nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS(isnq)); + 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); + if (isnq) { + sfp->sf_files = txdr_unsigned(sf->f_files); + sfp->sf_ffree = txdr_unsigned(sf->f_ffree); + } + nfsm_srvdone; +} + +/* + * Null operation, used by clients to ping server + */ +/* ARGSUSED */ +nfsrv_null(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + caddr_t bpos; + int error = VNOVAL, cache; + struct mbuf *mb, *mreq; + u_quad_t frev; + + nfsm_reply(0); + return (error); +} + +/* + * No operation, used for obsolete procedures + */ +/* ARGSUSED */ +nfsrv_noop(nfsd, mrep, md, dpos, cred, nam, mrq) + struct nfsd *nfsd; + struct mbuf *mrep, *md; + caddr_t dpos; + struct ucred *cred; + struct mbuf *nam, **mrq; +{ + caddr_t bpos; + int error, cache; + struct mbuf *mb, *mreq; + u_quad_t frev; + + if (nfsd->nd_repstat) + error = nfsd->nd_repstat; + else + error = EPROCUNAVAIL; + nfsm_reply(0); + 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 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. + */ +nfsrv_access(vp, flags, cred, rdonly, p) + register struct vnode *vp; + int flags; + register struct ucred *cred; + int rdonly; + struct proc *p; +{ + 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); + } + } + /* + * If there's shared text associated with + * the inode, try to free it up once. If + * we fail, we can't allow writing. + */ + if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) + return (ETXTBSY); + } + if (error = VOP_GETATTR(vp, &vattr, cred, p)) + return (error); + if ((error = VOP_ACCESS(vp, flags, cred, p)) && + cred->cr_uid != vattr.va_uid) + return (error); + return (0); +} -- cgit v1.2.3