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- /*
- * Copyright (c) 1989 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 7.40 (Berkeley) 5/15/91
- */
-
- /*
- * 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 "param.h"
- #include "proc.h"
- #include "file.h"
- #include "namei.h"
- #include "vnode.h"
- #include "mount.h"
- #include "mbuf.h"
-
- #include "../ufs/quota.h"
- #include "../ufs/inode.h"
- #include "../ufs/dir.h"
-
- #include "nfsv2.h"
- #include "nfs.h"
- #include "xdr_subs.h"
- #include "nfsm_subs.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 };
-
- /*
- * nfs getattr service
- */
- nfsrv_getattr(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register struct nfsv2_fattr *fp;
- struct vattr va;
- register struct vattr *vap = &va;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred))
- nfsm_reply(0);
- error = VOP_GETATTR(vp, vap, cred, p);
- vput(vp);
- nfsm_reply(NFSX_FATTR);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- nfsm_srvdone;
- }
-
- /*
- * nfs setattr service
- */
- nfsrv_setattr(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- struct vattr va;
- register struct vattr *vap = &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;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_disect(sp, struct nfsv2_sattr *, NFSX_SATTR);
- if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred))
- nfsm_reply(0);
- if (error = nfsrv_access(vp, VWRITE, cred, p))
- goto out;
- VATTR_NULL(vap);
- /*
- * Nah nah nah nah na nah
- * There is a bug in the Sun client that puts 0xffff in the mode
- * field of sattr when it should put in 0xffffffff. The u_short
- * doesn't sign extend.
- * --> check the low order 2 bytes for 0xffff
- */
- if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
- vap->va_mode = nfstov_mode(sp->sa_mode);
- if (sp->sa_uid != nfs_xdrneg1)
- vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
- if (sp->sa_gid != nfs_xdrneg1)
- vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
- if (sp->sa_size != nfs_xdrneg1)
- vap->va_size = fxdr_unsigned(u_long, sp->sa_size);
- /*
- * The usec field of sa_atime is overloaded with the va_flags field
- * for 4.4BSD clients. Hopefully other clients always set both the
- * sec and usec fields to -1 when not setting the atime.
- */
- if (sp->sa_atime.tv_sec != nfs_xdrneg1) {
- vap->va_atime.tv_sec = fxdr_unsigned(long, sp->sa_atime.tv_sec);
- vap->va_atime.tv_usec = 0;
- }
- if (sp->sa_atime.tv_usec != nfs_xdrneg1)
- vap->va_flags = fxdr_unsigned(u_long, sp->sa_atime.tv_usec);
- if (sp->sa_mtime.tv_sec != nfs_xdrneg1)
- fxdr_time(&sp->sa_mtime, &vap->va_mtime);
- if (error = VOP_SETATTR(vp, vap, cred, p)) {
- vput(vp);
- nfsm_reply(0);
- }
- error = VOP_GETATTR(vp, vap, cred, p);
- out:
- vput(vp);
- nfsm_reply(NFSX_FATTR);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- nfsm_srvdone;
- }
-
- /*
- * nfs lookup rpc
- */
- nfsrv_lookup(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- 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;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- long len;
- struct vattr va, *vap = &va;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = LOOKUP | LOCKLEAF;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- 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, vap, cred, p);
- vput(vp);
- nfsm_reply(NFSX_FH+NFSX_FATTR);
- nfsm_srvfhtom(fhp);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- nfsm_srvdone;
- }
-
- /*
- * nfs readlink service
- */
- nfsrv_readlink(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- 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;
- char *cp2;
- struct mbuf *mb, *mb2, *mp2, *mp3, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- struct uio io, *uiop = &io;
- int i, tlen, len;
-
- 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)) {
- m_freem(mp3);
- nfsm_reply(0);
- }
- if (vp->v_type != VLNK) {
- error = EINVAL;
- goto out;
- }
- 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(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- 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;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- struct mbuf *m2, *m3;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- struct uio io, *uiop = &io;
- struct vattr va, *vap = &va;
- int i, cnt, len, left, siz, tlen;
- off_t off;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_disect(tl, u_long *, NFSX_UNSIGNED);
- off = fxdr_unsigned(off_t, *tl);
- nfsm_srvstrsiz(cnt, NFS_MAXDATA);
- if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred))
- nfsm_reply(0);
- if (error = nfsrv_access(vp, VREAD | VEXEC, cred, p)) {
- vput(vp);
- nfsm_reply(0);
- }
- len = left = cnt;
- /*
- * Generate the mbuf list with the uio_iov ref. to it.
- */
- i = 0;
- m3 = (struct mbuf *)0;
- #ifdef lint
- m2 = (struct mbuf *)0;
- #endif /* lint */
- MALLOC(iv, struct iovec *,
- ((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec), M_TEMP,
- M_WAITOK);
- iv2 = iv;
- while (left > 0) {
- MGET(m, M_WAIT, MT_DATA);
- if (left > MINCLSIZE)
- MCLGET(m, M_WAIT);
- m->m_len = 0;
- siz = min(M_TRAILINGSPACE(m), left);
- m->m_len = siz;
- iv->iov_base = mtod(m, caddr_t);
- iv->iov_len = siz;
- iv++;
- i++;
- left -= siz;
- if (m3) {
- m2->m_next = m;
- m2 = m;
- } else
- m3 = m2 = m;
- }
- 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;
- uiop->uio_procp = (struct proc *)0;
- error = VOP_READ(vp, uiop, IO_NODELOCKED, cred);
- off = uiop->uio_offset;
- FREE((caddr_t)iv2, M_TEMP);
- if (error) {
- m_freem(m3);
- vput(vp);
- nfsm_reply(0);
- }
- if (error = VOP_GETATTR(vp, vap, cred, p))
- m_freem(m3);
- vput(vp);
- nfsm_reply(NFSX_FATTR+NFSX_UNSIGNED);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- len -= uiop->uio_resid;
- if (len > 0) {
- tlen = nfsm_rndup(len);
- if (cnt != tlen || tlen != len)
- nfsm_adj(m3, cnt-tlen, tlen-len);
- } else {
- m_freem(m3);
- m3 = (struct mbuf *)0;
- }
- nfsm_build(tl, u_long *, NFSX_UNSIGNED);
- *tl = txdr_unsigned(len);
- mb->m_next = m3;
- nfsm_srvdone;
- }
-
- /*
- * nfs write service
- */
- nfsrv_write(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register struct iovec *ivp;
- register struct mbuf *mp;
- register struct nfsv2_fattr *fp;
- struct iovec iv[NFS_MAXIOVEC];
- struct vattr va;
- register struct vattr *vap = &va;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- struct uio io, *uiop = &io;
- off_t off;
- long siz, len, xfer;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_disect(tl, u_long *, 4*NFSX_UNSIGNED);
- off = fxdr_unsigned(off_t, *++tl);
- tl += 2;
- 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))
- nfsm_reply(0);
- if (error = nfsrv_access(vp, VWRITE, cred, p)) {
- 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, IO_SYNC | IO_NODELOCKED,
- cred)) {
- vput(vp);
- nfsm_reply(0);
- }
- off = uiop->uio_offset;
- }
- error = VOP_GETATTR(vp, vap, cred, p);
- vput(vp);
- nfsm_reply(NFSX_FATTR);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- nfsm_srvdone;
- }
-
- /*
- * nfs create service
- * now does a truncate to 0 length via. setattr if it already exists
- */
- nfsrv_create(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register struct nfsv2_fattr *fp;
- struct vattr va;
- register struct vattr *vap = &va;
- struct nameidata nd;
- register caddr_t cp;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- long rdev;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- long len;
-
- nd.ni_nameiop = 0;
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = CREATE | LOCKPARENT | LOCKLEAF | SAVESTART;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- nfsm_reply(0);
- VATTR_NULL(vap);
- nfsm_disect(tl, u_long *, NFSX_SATTR);
- /*
- * Iff doesn't exist, create it
- * otherwise just truncate to 0 length
- * should I set the mode too ??
- */
- if (nd.ni_vp == NULL) {
- vap->va_type = IFTOVT(fxdr_unsigned(u_long, *tl));
- if (vap->va_type == VNON)
- vap->va_type = VREG;
- vap->va_mode = nfstov_mode(*tl);
- rdev = fxdr_unsigned(long, *(tl+3));
- if (vap->va_type == VREG || vap->va_type == VSOCK) {
- vrele(nd.ni_startdir);
- if (error = VOP_CREATE(&nd, vap, p))
- nfsm_reply(0);
- FREE(nd.ni_pnbuf, M_NAMEI);
- } else if (vap->va_type == VCHR || vap->va_type == VBLK ||
- vap->va_type == VFIFO) {
- if (vap->va_type == VCHR && rdev == 0xffffffff)
- vap->va_type = VFIFO;
- if (vap->va_type == VFIFO) {
- #ifndef FIFO
- VOP_ABORTOP(&nd);
- vput(nd.ni_dvp);
- error = ENXIO;
- goto out;
- #endif /* FIFO */
- } else if (error = suser(cred, (short *)0)) {
- VOP_ABORTOP(&nd);
- vput(nd.ni_dvp);
- goto out;
- } else
- vap->va_rdev = (dev_t)rdev;
- if (error = VOP_MKNOD(&nd, vap, cred, p)) {
- vrele(nd.ni_startdir);
- nfsm_reply(0);
- }
- nd.ni_nameiop &= ~(OPMASK | LOCKPARENT | SAVESTART);
- nd.ni_nameiop |= LOOKUP;
- if (error = lookup(&nd, p)) {
- free(nd.ni_pnbuf, M_NAMEI);
- nfsm_reply(0);
- }
- FREE(nd.ni_pnbuf, M_NAMEI);
- if (nd.ni_more) {
- vrele(nd.ni_dvp);
- vput(nd.ni_vp);
- VOP_ABORTOP(&nd);
- error = EINVAL;
- nfsm_reply(0);
- }
- } else {
- VOP_ABORTOP(&nd);
- vput(nd.ni_dvp);
- error = ENXIO;
- goto out;
- }
- vp = nd.ni_vp;
- } else {
- vrele(nd.ni_startdir);
- free(nd.ni_pnbuf, M_NAMEI);
- vp = nd.ni_vp;
- if (nd.ni_dvp == vp)
- vrele(nd.ni_dvp);
- else
- vput(nd.ni_dvp);
- VOP_ABORTOP(&nd);
- vap->va_size = 0;
- if (error = VOP_SETATTR(vp, vap, cred, p)) {
- 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, vap, cred, p);
- vput(vp);
- nfsm_reply(NFSX_FH+NFSX_FATTR);
- nfsm_srvfhtom(fhp);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- return (error);
- nfsmout:
- if (nd.ni_nameiop)
- vrele(nd.ni_startdir);
- VOP_ABORTOP(&nd);
- 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_pnbuf, M_NAMEI);
- nfsm_reply(0);
- }
-
- /*
- * nfs remove service
- */
- nfsrv_remove(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- struct nameidata nd;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- long len;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- nfsm_reply(0);
- vp = nd.ni_vp;
- if (vp->v_type == VDIR &&
- (error = suser(cred, (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) {
- error = VOP_REMOVE(&nd, p);
- } else {
- VOP_ABORTOP(&nd);
- 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(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mreq;
- struct nameidata fromnd, tond;
- struct vnode *fvp, *tvp, *tdvp;
- nfsv2fh_t fnfh, tnfh;
- fhandle_t *ffhp, *tfhp;
- long len, len2;
- int rootflg = 0;
-
- ffhp = &fnfh.fh_generic;
- tfhp = &tnfh.fh_generic;
- fromnd.ni_nameiop = 0;
- tond.ni_nameiop = 0;
- nfsm_srvmtofh(ffhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- /*
- * Remember if we are root so that we can reset cr_uid before
- * the second nfs_namei() call
- */
- if (cred->cr_uid == 0)
- rootflg++;
- fromnd.ni_cred = cred;
- fromnd.ni_nameiop = DELETE | WANTPARENT | SAVESTART;
- if (error = nfs_namei(&fromnd, ffhp, len, &md, &dpos, p))
- nfsm_reply(0);
- fvp = fromnd.ni_vp;
- nfsm_srvmtofh(tfhp);
- nfsm_strsiz(len2, NFS_MAXNAMLEN);
- if (rootflg)
- cred->cr_uid = 0;
- tond.ni_cred = cred;
- tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE
- | SAVESTART;
- if (error = nfs_namei(&tond, tfhp, len2, &md, &dpos, p)) {
- VOP_ABORTOP(&fromnd);
- 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 (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_namelen == tond.ni_namelen &&
- !bcmp(fromnd.ni_ptr, tond.ni_ptr, fromnd.ni_namelen))
- error = -1;
- out:
- if (!error) {
- error = VOP_RENAME(&fromnd, &tond, p);
- } else {
- VOP_ABORTOP(&tond);
- if (tdvp == tvp)
- vrele(tdvp);
- else
- vput(tdvp);
- if (tvp)
- vput(tvp);
- VOP_ABORTOP(&fromnd);
- vrele(fromnd.ni_dvp);
- vrele(fvp);
- }
- vrele(tond.ni_startdir);
- FREE(tond.ni_pnbuf, M_NAMEI);
- out1:
- vrele(fromnd.ni_startdir);
- FREE(fromnd.ni_pnbuf, M_NAMEI);
- nfsm_reply(0);
- return (error);
-
- nfsmout:
- if (tond.ni_nameiop) {
- vrele(tond.ni_startdir);
- FREE(tond.ni_pnbuf, M_NAMEI);
- }
- if (fromnd.ni_nameiop) {
- vrele(fromnd.ni_startdir);
- FREE(fromnd.ni_pnbuf, M_NAMEI);
- VOP_ABORTOP(&fromnd);
- vrele(fromnd.ni_dvp);
- vrele(fvp);
- }
- return (error);
- }
-
- /*
- * nfs link service
- */
- nfsrv_link(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- struct nameidata nd;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mreq;
- struct vnode *vp, *xp;
- nfsv2fh_t nfh, dnfh;
- fhandle_t *fhp, *dfhp;
- long len;
-
- 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))
- nfsm_reply(0);
- if (vp->v_type == VDIR && (error = suser(cred, NULL)))
- goto out1;
- nd.ni_cred = cred;
- nd.ni_nameiop = CREATE | LOCKPARENT;
- if (error = nfs_namei(&nd, dfhp, len, &md, &dpos, p))
- 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) {
- error = VOP_LINK(vp, &nd, p);
- } else {
- VOP_ABORTOP(&nd);
- 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(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- struct vattr va;
- struct nameidata nd;
- register struct vattr *vap = &va;
- register u_long *tl;
- register long t1;
- struct nfsv2_sattr *sp;
- caddr_t bpos;
- struct uio io;
- struct iovec iv;
- int error = 0;
- char *pathcp, *cp2;
- struct mbuf *mb, *mreq;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- long len, len2;
-
- pathcp = (char *)0;
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = CREATE | LOCKPARENT;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- 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_disect(sp, struct nfsv2_sattr *, NFSX_SATTR);
- *(pathcp + len2) = '\0';
- if (nd.ni_vp) {
- VOP_ABORTOP(&nd);
- 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(vap);
- vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode);
- error = VOP_SYMLINK(&nd, vap, pathcp, p);
- out:
- if (pathcp)
- FREE(pathcp, M_TEMP);
- nfsm_reply(0);
- return (error);
- nfsmout:
- VOP_ABORTOP(&nd);
- 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(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- struct vattr va;
- register struct vattr *vap = &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;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- long len;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = CREATE | LOCKPARENT;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- nfsm_reply(0);
- nfsm_disect(tl, u_long *, NFSX_UNSIGNED);
- VATTR_NULL(vap);
- vap->va_type = VDIR;
- vap->va_mode = nfstov_mode(*tl++);
- vp = nd.ni_vp;
- if (vp != NULL) {
- VOP_ABORTOP(&nd);
- if (nd.ni_dvp == vp)
- vrele(nd.ni_dvp);
- else
- vput(nd.ni_dvp);
- vrele(vp);
- error = EEXIST;
- nfsm_reply(0);
- }
- if (error = VOP_MKDIR(&nd, vap, p))
- 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, vap, cred, p);
- vput(vp);
- nfsm_reply(NFSX_FH+NFSX_FATTR);
- nfsm_srvfhtom(fhp);
- nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR);
- nfsm_srvfillattr;
- return (error);
- nfsmout:
- VOP_ABORTOP(&nd);
- 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(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf *mrep, *md, **mrq;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- long len;
- struct nameidata nd;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
- nd.ni_cred = cred;
- nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF;
- if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p))
- 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) {
- error = VOP_RMDIR(&nd, p);
- } else {
- VOP_ABORTOP(&nd);
- 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_ino == 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 }
- * 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.
- */
- nfsrv_readdir(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register char *bp, *be;
- register struct mbuf *mp;
- register struct direct *dp;
- register caddr_t cp;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- char *cpos, *cend;
- int len, nlen, rem, xfer, tsiz, i;
- struct vnode *vp;
- struct mbuf *mp2, *mp3;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- struct uio io;
- struct iovec iv;
- int siz, cnt, fullsiz, eofflag;
- u_long on;
- char *rbuf;
- off_t off, toff;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- nfsm_disect(tl, u_long *, 2*NFSX_UNSIGNED);
- toff = fxdr_unsigned(off_t, *tl++);
- off = (toff & ~(NFS_DIRBLKSIZ-1));
- on = (toff & (NFS_DIRBLKSIZ-1));
- cnt = fxdr_unsigned(int, *tl);
- siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1));
- if (cnt > NFS_MAXREADDIR)
- siz = NFS_MAXREADDIR;
- fullsiz = siz;
- if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred))
- nfsm_reply(0);
- if (error = nfsrv_access(vp, VEXEC, cred, p)) {
- vput(vp);
- nfsm_reply(0);
- }
- VOP_UNLOCK(vp);
- MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
- again:
- iv.iov_base = rbuf;
- iv.iov_len = fullsiz;
- io.uio_iov = &iv;
- io.uio_iovcnt = 1;
- io.uio_offset = off;
- 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);
- off = io.uio_offset;
- if (error) {
- vrele(vp);
- 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)rbuf, M_TEMP);
- return (0);
- }
- }
-
- /*
- * Check for degenerate cases of nothing useful read.
- * If so go try again
- */
- cpos = rbuf + on;
- cend = rbuf + siz;
- dp = (struct direct *)cpos;
- while (cpos < cend && dp->d_ino == 0) {
- cpos += dp->d_reclen;
- dp = (struct direct *)cpos;
- }
- if (cpos >= cend) {
- toff = off;
- siz = fullsiz;
- on = 0;
- goto again;
- }
-
- cpos = rbuf + on;
- cend = rbuf + siz;
- dp = (struct direct *)cpos;
- vrele(vp);
- len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */
- bp = be = (caddr_t)0;
- mp3 = (struct mbuf *)0;
- nfsm_reply(siz);
-
- /* Loop through the records and build reply */
- while (cpos < cend) {
- if (dp->d_ino != 0) {
- nlen = dp->d_namlen;
- rem = nfsm_rndup(nlen)-nlen;
-
- /*
- * As noted above, the NFS spec. is not clear about what
- * should be included in "count" as totalled up here in
- * "len".
- */
- len += (4*NFSX_UNSIGNED+nlen+rem);
- if (len > cnt) {
- eofflag = 0;
- break;
- }
-
- /* Build the directory record xdr from the direct entry */
- nfsm_clget;
- *tl = nfs_true;
- bp += NFSX_UNSIGNED;
- nfsm_clget;
- *tl = txdr_unsigned(dp->d_ino);
- bp += NFSX_UNSIGNED;
- nfsm_clget;
- *tl = txdr_unsigned(nlen);
- bp += NFSX_UNSIGNED;
-
- /* And loop arround 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 */
- toff += dp->d_reclen;
- *tl = txdr_unsigned(toff);
- bp += NFSX_UNSIGNED;
- } else
- toff += dp->d_reclen;
- cpos += dp->d_reclen;
- dp = (struct direct *)cpos;
- }
- nfsm_clget;
- *tl = nfs_false;
- bp += NFSX_UNSIGNED;
- nfsm_clget;
- if (eofflag)
- *tl = nfs_true;
- else
- *tl = nfs_false;
- bp += NFSX_UNSIGNED;
- if (bp < be)
- mp->m_len = bp-mtod(mp, caddr_t);
- mb->m_next = mp3;
- FREE(rbuf, M_TEMP);
- nfsm_srvdone;
- }
-
- /*
- * nfs statfs service
- */
- nfsrv_statfs(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- register struct statfs *sf;
- register struct nfsv2_statfs *sfp;
- register u_long *tl;
- register long t1;
- caddr_t bpos;
- int error = 0;
- char *cp2;
- struct mbuf *mb, *mb2, *mreq;
- struct vnode *vp;
- nfsv2fh_t nfh;
- fhandle_t *fhp;
- struct statfs statfs;
-
- fhp = &nfh.fh_generic;
- nfsm_srvmtofh(fhp);
- if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred))
- nfsm_reply(0);
- sf = &statfs;
- error = VFS_STATFS(vp->v_mount, sf, p);
- vput(vp);
- nfsm_reply(NFSX_STATFS);
- nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS);
- sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
- sfp->sf_bsize = txdr_unsigned(sf->f_fsize);
- sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
- sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
- sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
- nfsm_srvdone;
- }
-
- /*
- * Null operation, used by clients to ping server
- */
- /* ARGSUSED */
- nfsrv_null(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- caddr_t bpos;
- int error = 0;
- struct mbuf *mb, *mreq;
-
- error = VNOVAL;
- nfsm_reply(0);
- return (error);
- }
-
- /*
- * No operation, used for obsolete procedures
- */
- /* ARGSUSED */
- nfsrv_noop(mrep, md, dpos, cred, xid, mrq, repstat, p)
- struct mbuf **mrq;
- struct mbuf *mrep, *md;
- caddr_t dpos;
- struct ucred *cred;
- u_long xid;
- int *repstat;
- struct proc *p;
- {
- caddr_t bpos;
- int error = 0;
- struct mbuf *mb, *mreq;
-
- 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 MNT_EXRDONLY 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, p)
- register struct vnode *vp;
- int flags;
- register struct ucred *cred;
- struct proc *p;
- {
- struct vattr vattr;
- int error;
- if (flags & VWRITE) {
- /* Just vn_writechk() changed to check MNT_EXRDONLY */
- /*
- * 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 (vp->v_mount->mnt_flag & (MNT_RDONLY | MNT_EXRDONLY)) {
- 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);
- }
-