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-rw-r--r--sys/nfs/nfs_serv.c1902
1 files changed, 1902 insertions, 0 deletions
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 <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include <sys/namei.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/mbuf.h>
+#include <sys/dirent.h>
+#include <sys/stat.h>
+
+#include <vm/vm.h>
+
+#include <nfs/nfsv2.h>
+#include <nfs/rpcv2.h>
+#include <nfs/nfs.h>
+#include <nfs/xdr_subs.h>
+#include <nfs/nfsm_subs.h>
+#include <nfs/nqnfs.h>
+
+/* 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 11:24:51 +0000