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freebsd-skq/sys/nfs/nfs_serv.c
Poul-Henning Kamp b8dce649f1 Staticize.
1995-12-17 21:14:36 +00:00

3434 lines
85 KiB
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/*
* 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 8.3 (Berkeley) 1/12/94
* $Id: nfs_serv.c,v 1.26 1995/12/07 12:47:25 davidg Exp $
*/
/*
* nfs version 2 and 3 server calls to vnode ops
* - these routines generally have 3 phases
* 1 - break down and validate rpc request in mbuf list
* 2 - do the vnode ops for the request
* (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c)
* 3 - build the rpc reply in an mbuf list
* nb:
* - do not mix the phases, since the nfsm_?? macros can return failures
* on a bad rpc or similar and do not do any vrele() or vput()'s
*
* - the nfsm_reply() macro generates an nfs rpc reply with the nfs
* error number iff error != 0 whereas
* returning an error from the server function implies a fatal error
* such as a badly constructed rpc request that should be dropped without
* a reply.
* For Version 3, nfsm_reply() does not return for the error case, since
* most version 3 rpcs return more than the status for error cases.
*/
#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/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dir.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <nfs/nfsproto.h>
#include <nfs/rpcv2.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nqnfs.h>
/* Global vars */
extern u_long nfs_xdrneg1;
extern u_long nfs_false, nfs_true;
extern enum vtype nv3tov_type[8];
extern struct nfsstats nfsstats;
nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON,
NFCHR, NFNON };
nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK,
NFFIFO, NFNON };
int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000;
int nfs_async;
SYSCTL_INT(_fs_nfs, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, "");
static int nfsrv_access __P((struct vnode *,int,struct ucred *,int,
struct proc *));
static void nfsrvw_coalesce __P((struct nfsrv_descript *,
struct nfsrv_descript *));
/*
* nfs v3 access service
*/
int
nfsrv3_access(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret;
char *cp2;
struct mbuf *mb, *mreq, *mb2;
struct vattr vattr, *vap = &vattr;
u_long testmode, nfsmode;
u_quad_t frev;
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
return (0);
}
nfsmode = fxdr_unsigned(u_long, *tl);
if ((nfsmode & NFSV3ACCESS_READ) &&
nfsrv_access(vp, VREAD, cred, rdonly, procp))
nfsmode &= ~NFSV3ACCESS_READ;
if (vp->v_type == VDIR)
testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
NFSV3ACCESS_DELETE);
else
testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
if ((nfsmode & testmode) &&
nfsrv_access(vp, VWRITE, cred, rdonly, procp))
nfsmode &= ~testmode;
if (vp->v_type == VDIR)
testmode = NFSV3ACCESS_LOOKUP;
else
testmode = NFSV3ACCESS_EXECUTE;
if ((nfsmode & testmode) &&
nfsrv_access(vp, VEXEC, cred, rdonly, procp))
nfsmode &= ~testmode;
getret = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, vap);
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = txdr_unsigned(nfsmode);
nfsm_srvdone;
}
/*
* nfs getattr service
*/
int
nfsrv_getattr(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct vattr va;
register struct vattr *vap = &va;
struct vnode *vp;
nfsfh_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, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(0);
return (0);
}
nqsrv_getl(vp, ND_READ);
error = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
if (error)
return (0);
nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
nfsm_srvfillattr(vap, fp);
nfsm_srvdone;
}
/*
* nfs setattr service
*/
int
nfsrv_setattr(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, preat;
register struct vattr *vap = &va;
register struct nfsv2_sattr *sp;
register struct nfs_fattr *fp;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev;
struct timespec guard;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
VATTR_NULL(vap);
if (v3) {
nfsm_srvsattr(vap);
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
gcheck = fxdr_unsigned(int, *tl);
if (gcheck) {
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
fxdr_nfsv3time(tl, &guard);
}
} else {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
/*
* Nah nah nah nah na nah
* There is a bug in the Sun client that puts 0xffff in the mode
* field of sattr when it should put in 0xffffffff. The u_short
* doesn't sign extend.
* --> check the low order 2 bytes for 0xffff
*/
if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
vap->va_mode = nfstov_mode(sp->sa_mode);
if (sp->sa_uid != nfs_xdrneg1)
vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
if (sp->sa_gid != nfs_xdrneg1)
vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
if (sp->sa_size != nfs_xdrneg1)
vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size);
if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) {
#ifdef notyet
fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime);
#else
vap->va_atime.ts_sec =
fxdr_unsigned(long, sp->sa_atime.nfsv2_sec);
vap->va_atime.ts_nsec = 0;
#endif
}
if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1)
fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime);
}
/*
* Now that we have all the fields, lets do it.
*/
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
return (0);
}
nqsrv_getl(vp, ND_WRITE);
if (v3) {
error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp);
if (!error && gcheck &&
(preat.va_ctime.ts_sec != guard.ts_sec ||
preat.va_ctime.ts_nsec != guard.ts_nsec))
error = NFSERR_NOT_SYNC;
if (error) {
nfsrv_vput(vp);
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
return (0);
}
}
/*
* If the size is being changed write acces is required, otherwise
* just check for a read only file system.
*/
if (vap->va_size == ((u_quad_t)((quad_t) -1))) {
if (rdonly || (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,
procp))
goto out;
}
error = VOP_SETATTR(vp, vap, cred, procp);
postat_ret = VOP_GETATTR(vp, vap, cred, procp);
if (!error)
error = postat_ret;
out:
nfsrv_vput(vp);
nfsm_reply(NFSX_WCCORFATTR(v3));
if (v3) {
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
return (0);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
nfsm_srvdone;
}
/*
* nfs lookup rpc
*/
int
nfsrv_lookup(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct nameidata nd;
struct vnode *vp, *dirp;
nfsfh_t nfh;
fhandle_t *fhp;
register caddr_t cp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, dirattr_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vattr va, dirattr, *vap = &va;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred,
procp);
nfsrv_vrele(dirp);
}
if (error) {
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
return (0);
}
nqsrv_getl(nd.ni_startdir, ND_READ);
nfsrv_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;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3));
if (error) {
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
return (0);
}
nfsm_srvfhtom(fhp, v3);
if (v3) {
nfsm_srvpostop_attr(0, vap);
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
nfsm_srvdone;
}
/*
* nfs readlink service
*/
int
nfsrv_readlink(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
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, getret;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mp2, *mp3, *mreq;
struct vnode *vp;
struct vattr attr;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
u_quad_t frev;
#ifndef nolint
mp2 = mp3 = (struct mbuf *)0;
#endif
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, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
m_freem(mp3);
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
return (0);
}
if (vp->v_type != VLNK) {
if (v3)
error = EINVAL;
else
error = ENXIO;
goto out;
}
nqsrv_getl(vp, ND_READ);
error = VOP_READLINK(vp, uiop, cred);
out:
getret = VOP_GETATTR(vp, &attr, cred, procp);
nfsrv_vput(vp);
if (error)
m_freem(mp3);
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED);
if (v3) {
nfsm_srvpostop_attr(getret, &attr);
if (error)
return (0);
}
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
*/
int
nfsrv_read(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct iovec *iv;
struct iovec *iv2;
register struct mbuf *m;
register struct nfs_fattr *fp;
register u_long *tl;
register long t1;
register int i;
caddr_t bpos;
int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret;
int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct mbuf *m2;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
struct vattr va, *vap = &va;
off_t off;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (v3) {
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
fxdr_hyper(tl, &off);
} else {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
off = (off_t)fxdr_unsigned(u_long, *tl);
}
nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd));
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
return (0);
}
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
if (!error) {
nqsrv_getl(vp, ND_READ);
if (error = nfsrv_access(vp, VREAD, cred, rdonly, procp))
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp);
}
getret = VOP_GETATTR(vp, vap, cred, procp);
if (!error)
error = getret;
if (error) {
nfsrv_vput(vp);
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, vap);
return (0);
}
if (off >= vap->va_size)
cnt = 0;
else if ((off + reqlen) > vap->va_size)
cnt = nfsm_rndup(vap->va_size - off);
else
cnt = reqlen;
nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt));
if (v3) {
nfsm_build(tl, u_long *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
*tl++ = nfs_true;
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V3FATTR / sizeof (u_long));
} else {
nfsm_build(tl, u_long *, NFSX_V2FATTR + NFSX_UNSIGNED);
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V2FATTR / sizeof (u_long));
}
len = left = cnt;
if (cnt > 0) {
/*
* Generate the mbuf list with the uio_iov ref. to it.
*/
i = 0;
m = m2 = mb;
while (left > 0) {
siz = min(M_TRAILINGSPACE(m), left);
if (siz > 0) {
left -= siz;
i++;
}
if (left > 0) {
MGET(m, M_WAIT, MT_DATA);
MCLGET(m, M_WAIT);
m->m_len = 0;
m2->m_next = m;
m2 = m;
}
}
MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
M_TEMP, M_WAITOK);
uiop->uio_iov = iv2 = iv;
m = mb;
left = cnt;
i = 0;
while (left > 0) {
if (m == NULL)
panic("nfsrv_read iov");
siz = min(M_TRAILINGSPACE(m), left);
if (siz > 0) {
iv->iov_base = mtod(m, caddr_t) + m->m_len;
iv->iov_len = siz;
m->m_len += siz;
left -= siz;
iv++;
i++;
}
m = m->m_next;
}
uiop->uio_iovcnt = i;
uiop->uio_offset = off;
uiop->uio_resid = 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 || (getret = VOP_GETATTR(vp, vap, cred, procp))) {
if (!error)
error = getret;
m_freem(mreq);
nfsrv_vput(vp);
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, vap);
return (0);
}
} else
uiop->uio_resid = 0;
nfsrv_vput(vp);
nfsm_srvfillattr(vap, fp);
len -= uiop->uio_resid;
tlen = nfsm_rndup(len);
if (cnt != tlen || tlen != len)
nfsm_adj(mb, cnt - tlen, tlen - len);
if (v3) {
*tl++ = txdr_unsigned(len);
if (len < reqlen)
*tl++ = nfs_true;
else
*tl++ = nfs_false;
}
*tl = txdr_unsigned(len);
nfsm_srvdone;
}
/*
* nfs write service
*/
int
nfsrv_write(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct iovec *ivp;
register int i, cnt;
register struct mbuf *mp;
register struct nfs_fattr *fp;
struct iovec *iv;
struct vattr va, forat;
register struct vattr *vap = &va;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, len, forat_ret = 1;
int ioflags, aftat_ret = 1, retlen, zeroing, adjust;
int stable = NFSV3WRITE_FILESYNC;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
off_t off;
u_quad_t frev;
if (mrep == NULL) {
*mrq = NULL;
return (0);
}
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (v3) {
nfsm_dissect(tl, u_long *, 5 * NFSX_UNSIGNED);
fxdr_hyper(tl, &off);
tl += 3;
stable = fxdr_unsigned(int, *tl++);
} else {
nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED);
off = (off_t)fxdr_unsigned(u_long, *++tl);
tl += 2;
if (nfs_async)
stable = NFSV3WRITE_UNSTABLE;
}
retlen = len = fxdr_unsigned(long, *tl);
cnt = i = 0;
/*
* For NFS Version 2, it is not obvious what a write of zero length
* should do, but I might as well be consistent with Version 3,
* which is to return ok so long as there are no permission problems.
*/
if (len > 0) {
zeroing = 1;
mp = mrep;
while (mp) {
if (mp == md) {
zeroing = 0;
adjust = dpos - mtod(mp, caddr_t);
mp->m_len -= adjust;
if (mp->m_len > 0 && adjust > 0)
NFSMADV(mp, adjust);
}
if (zeroing)
mp->m_len = 0;
else if (mp->m_len > 0) {
i += mp->m_len;
if (i > len) {
mp->m_len -= (i - len);
zeroing = 1;
}
if (mp->m_len > 0)
cnt++;
}
mp = mp->m_next;
}
}
if (len > NFS_MAXDATA || len < 0 || i < len) {
error = EIO;
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
return (0);
}
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
return (0);
}
if (v3)
forat_ret = VOP_GETATTR(vp, &forat, cred, procp);
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
if (!error) {
nqsrv_getl(vp, ND_WRITE);
error = nfsrv_access(vp, VWRITE, cred, rdonly, procp);
}
if (error) {
nfsrv_vput(vp);
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
return (0);
}
if (len > 0) {
MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
M_WAITOK);
uiop->uio_iov = iv = ivp;
uiop->uio_iovcnt = cnt;
mp = mrep;
while (mp) {
if (mp->m_len > 0) {
ivp->iov_base = mtod(mp, caddr_t);
ivp->iov_len = mp->m_len;
ivp++;
}
mp = mp->m_next;
}
/*
* XXX
* The IO_METASYNC flag indicates that all metadata (and not just
* enough to ensure data integrity) mus be written to stable storage
* synchronously.
* (IO_METASYNC is not yet implemented in 4.4BSD-Lite.)
*/
if (stable == NFSV3WRITE_UNSTABLE)
ioflags = IO_NODELOCKED;
else if (stable == NFSV3WRITE_DATASYNC)
ioflags = (IO_SYNC | IO_NODELOCKED);
else
ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
uiop->uio_resid = len;
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
uiop->uio_offset = off;
error = VOP_WRITE(vp, uiop, ioflags, cred);
nfsstats.srvvop_writes++;
FREE((caddr_t)iv, M_TEMP);
}
aftat_ret = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
if (!error)
error = aftat_ret;
nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) +
2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3));
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
if (error)
return (0);
nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(retlen);
if (stable == NFSV3WRITE_UNSTABLE)
*tl++ = txdr_unsigned(stable);
else
*tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC);
/*
* Actually, there is no need to txdr these fields,
* but it may make the values more human readable,
* for debugging purposes.
*/
*tl++ = txdr_unsigned(boottime.tv_sec);
*tl = txdr_unsigned(boottime.tv_usec);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
nfsm_srvdone;
}
/*
* NFS write service with write gathering support. Called when
* nfsrvw_procrastinate > 0.
* See: Chet Juszczak, "Improving the Write Performance of an NFS Server",
* in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco,
* Jan. 1994.
*/
int
nfsrv_writegather(ndp, slp, procp, mrq)
struct nfsrv_descript **ndp;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
register struct iovec *ivp;
register struct mbuf *mp;
register struct nfsrv_descript *wp, *nfsd, *owp, *swp;
register struct nfs_fattr *fp;
register int i;
struct iovec *iov;
struct nfsrvw_delayhash *wpp;
struct ucred *cred;
struct vattr va, forat;
register u_long *tl;
register long t1;
caddr_t bpos, dpos;
int error = 0, rdonly, cache, len, forat_ret = 1;
int ioflags, aftat_ret = 1, s, adjust, v3, zeroing;
char *cp2;
struct mbuf *mb, *mb2, *mreq, *mrep, *md;
struct vnode *vp;
struct uio io, *uiop = &io;
u_quad_t frev, cur_usec;
#ifndef nolint
i = 0;
len = 0;
#endif
*mrq = NULL;
if (*ndp) {
nfsd = *ndp;
*ndp = NULL;
mrep = nfsd->nd_mrep;
md = nfsd->nd_md;
dpos = nfsd->nd_dpos;
cred = &nfsd->nd_cr;
v3 = (nfsd->nd_flag & ND_NFSV3);
LIST_INIT(&nfsd->nd_coalesce);
nfsd->nd_mreq = NULL;
nfsd->nd_stable = NFSV3WRITE_FILESYNC;
cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec;
nfsd->nd_time = cur_usec + nfsrvw_procrastinate;
/*
* Now, get the write header..
*/
nfsm_srvmtofh(&nfsd->nd_fh);
if (v3) {
nfsm_dissect(tl, u_long *, 5 * NFSX_UNSIGNED);
fxdr_hyper(tl, &nfsd->nd_off);
tl += 3;
nfsd->nd_stable = fxdr_unsigned(int, *tl++);
} else {
nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED);
nfsd->nd_off = (off_t)fxdr_unsigned(u_long, *++tl);
tl += 2;
if (nfs_async)
nfsd->nd_stable = NFSV3WRITE_UNSTABLE;
}
len = fxdr_unsigned(long, *tl);
nfsd->nd_len = len;
nfsd->nd_eoff = nfsd->nd_off + len;
/*
* Trim the header out of the mbuf list and trim off any trailing
* junk so that the mbuf list has only the write data.
*/
zeroing = 1;
i = 0;
mp = mrep;
while (mp) {
if (mp == md) {
zeroing = 0;
adjust = dpos - mtod(mp, caddr_t);
mp->m_len -= adjust;
if (mp->m_len > 0 && adjust > 0)
NFSMADV(mp, adjust);
}
if (zeroing)
mp->m_len = 0;
else {
i += mp->m_len;
if (i > len) {
mp->m_len -= (i - len);
zeroing = 1;
}
}
mp = mp->m_next;
}
if (len > NFS_MAXDATA || len < 0 || i < len) {
nfsmout:
m_freem(mrep);
error = EIO;
nfsm_writereply(2 * NFSX_UNSIGNED, v3);
if (v3)
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
nfsd->nd_mreq = mreq;
nfsd->nd_mrep = NULL;
nfsd->nd_time = 0;
}
/*
* Add this entry to the hash and time queues.
*/
s = splsoftclock();
owp = NULL;
wp = slp->ns_tq.lh_first;
while (wp && wp->nd_time < nfsd->nd_time) {
owp = wp;
wp = wp->nd_tq.le_next;
}
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_tq);
} else {
LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
}
if (nfsd->nd_mrep) {
wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data);
owp = NULL;
wp = wpp->lh_first;
while (wp &&
bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) {
owp = wp;
wp = wp->nd_hash.le_next;
}
while (wp && wp->nd_off < nfsd->nd_off &&
!bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) {
owp = wp;
wp = wp->nd_hash.le_next;
}
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_hash);
/*
* Search the hash list for overlapping entries and
* coalesce.
*/
for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) {
wp = nfsd->nd_hash.le_next;
if (NFSW_SAMECRED(owp, nfsd))
nfsrvw_coalesce(owp, nfsd);
}
} else {
LIST_INSERT_HEAD(wpp, nfsd, nd_hash);
}
}
splx(s);
}
/*
* Now, do VOP_WRITE()s for any one(s) that need to be done now
* and generate the associated reply mbuf list(s).
*/
loop1:
cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec;
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) {
owp = nfsd->nd_tq.le_next;
if (nfsd->nd_time > cur_usec)
break;
if (nfsd->nd_mreq)
continue;
LIST_REMOVE(nfsd, nd_tq);
LIST_REMOVE(nfsd, nd_hash);
splx(s);
mrep = nfsd->nd_mrep;
nfsd->nd_mrep = NULL;
cred = &nfsd->nd_cr;
v3 = (nfsd->nd_flag & ND_NFSV3);
forat_ret = aftat_ret = 1;
error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp,
nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH));
if (!error) {
if (v3)
forat_ret = VOP_GETATTR(vp, &forat, cred, procp);
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
} else
vp = NULL;
if (!error) {
nqsrv_getl(vp, ND_WRITE);
error = nfsrv_access(vp, VWRITE, cred, rdonly, procp);
}
if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE)
ioflags = IO_NODELOCKED;
else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC)
ioflags = (IO_SYNC | IO_NODELOCKED);
else
ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
uiop->uio_offset = nfsd->nd_off;
uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off;
if (uiop->uio_resid > 0) {
mp = mrep;
i = 0;
while (mp) {
if (mp->m_len > 0)
i++;
mp = mp->m_next;
}
uiop->uio_iovcnt = i;
MALLOC(iov, struct iovec *, i * sizeof (struct iovec),
M_TEMP, M_WAITOK);
uiop->uio_iov = ivp = iov;
mp = mrep;
while (mp) {
if (mp->m_len > 0) {
ivp->iov_base = mtod(mp, caddr_t);
ivp->iov_len = mp->m_len;
ivp++;
}
mp = mp->m_next;
}
if (!error) {
error = VOP_WRITE(vp, uiop, ioflags, cred);
nfsstats.srvvop_writes++;
}
FREE((caddr_t)iov, M_TEMP);
}
m_freem(mrep);
if (vp) {
aftat_ret = VOP_GETATTR(vp, &va, cred, procp);
nfsrv_vput(vp);
}
/*
* Loop around generating replies for all write rpcs that have
* now been completed.
*/
swp = nfsd;
do {
if (error) {
nfsm_writereply(NFSX_WCCDATA(v3), v3);
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
}
} else {
nfsm_writereply(NFSX_PREOPATTR(v3) +
NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED +
NFSX_WRITEVERF(v3), v3);
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(nfsd->nd_len);
*tl++ = txdr_unsigned(swp->nd_stable);
/*
* Actually, there is no need to txdr these fields,
* but it may make the values more human readable,
* for debugging purposes.
*/
*tl++ = txdr_unsigned(boottime.tv_sec);
*tl = txdr_unsigned(boottime.tv_usec);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(&va, fp);
}
}
nfsd->nd_mreq = mreq;
if (nfsd->nd_mrep)
panic("nfsrv_write: nd_mrep not free");
/*
* Done. Put it at the head of the timer queue so that
* the final phase can return the reply.
*/
s = splsoftclock();
if (nfsd != swp) {
nfsd->nd_time = 0;
LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
}
nfsd = swp->nd_coalesce.lh_first;
if (nfsd) {
LIST_REMOVE(nfsd, nd_tq);
}
splx(s);
} while (nfsd);
s = splsoftclock();
swp->nd_time = 0;
LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq);
splx(s);
goto loop1;
}
splx(s);
/*
* Search for a reply to return.
*/
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next)
if (nfsd->nd_mreq) {
LIST_REMOVE(nfsd, nd_tq);
*mrq = nfsd->nd_mreq;
*ndp = nfsd;
break;
}
splx(s);
return (0);
}
/*
* Coalesce the write request nfsd into owp. To do this we must:
* - remove nfsd from the queues
* - merge nfsd->nd_mrep into owp->nd_mrep
* - update the nd_eoff and nd_stable for owp
* - put nfsd on owp's nd_coalesce list
* NB: Must be called at splsoftclock().
*/
static void
nfsrvw_coalesce(owp, nfsd)
register struct nfsrv_descript *owp;
register struct nfsrv_descript *nfsd;
{
register int overlap;
register struct mbuf *mp;
LIST_REMOVE(nfsd, nd_hash);
LIST_REMOVE(nfsd, nd_tq);
if (owp->nd_eoff < nfsd->nd_eoff) {
overlap = owp->nd_eoff - nfsd->nd_off;
if (overlap < 0)
panic("nfsrv_coalesce: bad off");
if (overlap > 0)
m_adj(nfsd->nd_mrep, overlap);
mp = owp->nd_mrep;
while (mp->m_next)
mp = mp->m_next;
mp->m_next = nfsd->nd_mrep;
owp->nd_eoff = nfsd->nd_eoff;
} else
m_freem(nfsd->nd_mrep);
nfsd->nd_mrep = NULL;
if (nfsd->nd_stable == NFSV3WRITE_FILESYNC)
owp->nd_stable = NFSV3WRITE_FILESYNC;
else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC &&
owp->nd_stable == NFSV3WRITE_UNSTABLE)
owp->nd_stable = NFSV3WRITE_DATASYNC;
LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq);
}
/*
* Sort the group list in increasing numerical order.
* (Insertion sort by Chris Torek, who was grossed out by the bubble sort
* that used to be here.)
*/
void
nfsrvw_sort(list, num)
register gid_t *list;
register int num;
{
register int i, j;
gid_t v;
/* Insertion sort. */
for (i = 1; i < num; i++) {
v = list[i];
/* find correct slot for value v, moving others up */
for (j = i; --j >= 0 && v < list[j];)
list[j + 1] = list[j];
list[j + 1] = v;
}
}
/*
* copy credentials making sure that the result can be compared with bcmp().
*/
void
nfsrv_setcred(incred, outcred)
register struct ucred *incred, *outcred;
{
register int i;
bzero((caddr_t)outcred, sizeof (struct ucred));
outcred->cr_ref = 1;
outcred->cr_uid = incred->cr_uid;
outcred->cr_ngroups = incred->cr_ngroups;
for (i = 0; i < incred->cr_ngroups; i++)
outcred->cr_groups[i] = incred->cr_groups[i];
nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
}
/*
* nfs create service
* now does a truncate to 0 length via. setattr if it already exists
*/
int
nfsrv_create(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &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, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev, tempsize;
u_char cverf[NFSX_V3CREATEVERF];
#ifndef nolint
rdev = 0;
#endif
nd.ni_cnd.cn_nameiop = 0;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
nfsrv_vrele(dirp);
dirp = (struct vnode *)0;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
if (dirp)
nfsrv_vrele(dirp);
return (0);
}
VATTR_NULL(vap);
if (v3) {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
how = fxdr_unsigned(int, *tl);
switch (how) {
case NFSV3CREATE_GUARDED:
if (nd.ni_vp) {
error = EEXIST;
break;
}
case NFSV3CREATE_UNCHECKED:
nfsm_srvsattr(vap);
break;
case NFSV3CREATE_EXCLUSIVE:
nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF);
bcopy(cp, cverf, NFSX_V3CREATEVERF);
exclusive_flag = 1;
if (nd.ni_vp == NULL)
vap->va_mode = 0;
break;
};
vap->va_type = VREG;
} else {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
vap->va_type = IFTOVT(fxdr_unsigned(u_long, sp->sa_mode));
if (vap->va_type == VNON)
vap->va_type = VREG;
vap->va_mode = nfstov_mode(sp->sa_mode);
switch (vap->va_type) {
case VREG:
tsize = fxdr_unsigned(long, sp->sa_size);
if (tsize != -1)
vap->va_size = (u_quad_t)tsize;
break;
case VCHR:
case VBLK:
case VFIFO:
rdev = fxdr_unsigned(long, sp->sa_size);
break;
};
}
/*
* Iff doesn't exist, create it
* otherwise just truncate to 0 length
* should I set the mode too ??
*/
if (nd.ni_vp == NULL) {
if (vap->va_type == VREG || vap->va_type == VSOCK) {
nfsrv_vrele(nd.ni_startdir);
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (!error) {
nfsrv_vmio(nd.ni_vp);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
if (exclusive_flag) {
exclusive_flag = 0;
VATTR_NULL(vap);
bcopy(cverf, (caddr_t)&vap->va_atime,
NFSX_V3CREATEVERF);
error = VOP_SETATTR(nd.ni_vp, vap, cred,
procp);
}
}
} 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 (error = suser(cred, (u_short *)0)) {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
nfsm_reply(0);
return (error);
} else
vap->va_rdev = (dev_t)rdev;
nqsrv_getl(nd.ni_dvp, ND_WRITE);
if (error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) {
nfsrv_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 = procp;
nd.ni_cnd.cn_cred = cred;
if (error = lookup(&nd)) {
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
nfsm_reply(0);
}
nfsrv_vmio(nd.ni_vp);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
if (nd.ni_cnd.cn_flags & ISSYMLINK) {
nfsrv_vrele(nd.ni_dvp);
nfsrv_vput(nd.ni_vp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
error = EINVAL;
nfsm_reply(0);
}
} else {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
error = ENXIO;
}
vp = nd.ni_vp;
} else {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
vp = nd.ni_vp;
if (nd.ni_dvp == vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (vap->va_size != -1) {
error = nfsrv_access(vp, VWRITE, cred,
(nd.ni_cnd.cn_flags & RDONLY), procp);
if (!error) {
nqsrv_getl(vp, ND_WRITE);
tempsize = vap->va_size;
VATTR_NULL(vap);
vap->va_size = tempsize;
error = VOP_SETATTR(vp, vap, cred,
procp);
}
if (error)
nfsrv_vput(vp);
}
}
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
}
if (v3) {
if (exclusive_flag && !error &&
bcmp(cverf, (caddr_t)&vap->va_atime, NFSX_V3CREATEVERF))
error = EEXIST;
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
} else {
nfsm_srvfhtom(fhp, v3);
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
return (0);
nfsmout:
if (dirp)
nfsrv_vrele(dirp);
if (nd.ni_cnd.cn_nameiop) {
nfsrv_vrele(nd.ni_startdir);
free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI);
}
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vput(nd.ni_vp);
return (error);
}
/*
* nfs v3 mknod service
*/
int
nfsrv_mknod(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &va;
register u_long *tl;
struct nameidata nd;
register long t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
u_long major, minor;
enum vtype vtyp;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
nd.ni_cnd.cn_nameiop = 0;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
if (error) {
nfsm_reply(NFSX_WCCDATA(1));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
if (dirp)
nfsrv_vrele(dirp);
return (0);
}
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
vtyp = nfsv3tov_type(*tl);
if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
nfsrv_vrele(nd.ni_startdir);
free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI);
error = NFSERR_BADTYPE;
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
goto out;
}
VATTR_NULL(vap);
nfsm_srvsattr(vap);
if (vtyp == VCHR || vtyp == VBLK) {
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
major = fxdr_unsigned(u_long, *tl++);
minor = fxdr_unsigned(u_long, *tl);
vap->va_rdev = makedev(major, minor);
}
/*
* Iff doesn't exist, create it.
*/
if (nd.ni_vp) {
nfsrv_vrele(nd.ni_startdir);
free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI);
error = EEXIST;
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
goto out;
}
vap->va_type = vtyp;
if (vtyp == VSOCK) {
nfsrv_vrele(nd.ni_startdir);
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (!error)
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
} else {
if (error = suser(cred, (u_short *)0)) {
nfsrv_vrele(nd.ni_startdir);
free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
goto out;
}
nqsrv_getl(nd.ni_dvp, ND_WRITE);
if (error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) {
nfsrv_vrele(nd.ni_startdir);
goto out;
}
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART);
nd.ni_cnd.cn_proc = procp;
nd.ni_cnd.cn_cred = procp->p_ucred;
error = lookup(&nd);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
if (error)
goto out;
if (nd.ni_cnd.cn_flags & ISSYMLINK) {
nfsrv_vrele(nd.ni_dvp);
nfsrv_vput(nd.ni_vp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
error = EINVAL;
}
}
out:
vp = nd.ni_vp;
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
}
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1));
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
return (0);
nfsmout:
if (dirp)
nfsrv_vrele(dirp);
if (nd.ni_cnd.cn_nameiop) {
nfsrv_vrele(nd.ni_startdir);
free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI);
}
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vput(nd.ni_vp);
return (error);
}
/*
* nfs remove service
*/
int
nfsrv_remove(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp, *dirp;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
#ifndef nolint
vp = (struct vnode *)0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else
nfsrv_vrele(dirp);
}
if (!error) {
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;
}
vnode_pager_uncache(vp);
out:
if (!error) {
int deallocobj = 0;
nqsrv_getl(nd.ni_dvp, ND_WRITE);
nqsrv_getl(vp, ND_WRITE);
if ((vp->v_flag & VVMIO) && vp->v_object)
deallocobj = 1;
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
if (error == 0 && deallocobj)
vm_object_deallocate(vp->v_object);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_vput(vp);
}
}
if (dirp && v3) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsm_reply(NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
return (0);
}
nfsm_srvdone;
}
/*
* nfs rename service
*/
int
nfsrv_rename(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1;
int tdirfor_ret = 1, tdiraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct nameidata fromnd, tond;
struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0;
struct vnode *tdirp = (struct vnode *)0;
struct vattr fdirfor, fdiraft, tdirfor, tdiraft;
nfsfh_t fnfh, tnfh;
fhandle_t *ffhp, *tfhp;
u_quad_t frev;
uid_t saved_uid;
#ifndef nolint
fvp = (struct vnode *)0;
#endif
ffhp = &fnfh.fh_generic;
tfhp = &tnfh.fh_generic;
fromnd.ni_cnd.cn_nameiop = 0;
tond.ni_cnd.cn_nameiop = 0;
nfsm_srvmtofh(ffhp);
nfsm_srvnamesiz(len);
/*
* Remember our original uid so that we can reset cr_uid before
* the second nfs_namei() call, in case it is remapped.
*/
saved_uid = cred->cr_uid;
fromnd.ni_cnd.cn_cred = cred;
fromnd.ni_cnd.cn_nameiop = DELETE;
fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART;
error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md,
&dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (fdirp) {
if (v3)
fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred,
procp);
else {
nfsrv_vrele(fdirp);
fdirp = (struct vnode *)0;
}
}
if (error) {
nfsm_reply(2 * NFSX_WCCDATA(v3));
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
if (fdirp)
nfsrv_vrele(fdirp);
return (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;
error = nfs_namei(&tond, tfhp, len2, slp, nam, &md,
&dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (tdirp) {
if (v3)
tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred,
procp);
else {
nfsrv_vrele(tdirp);
tdirp = (struct vnode *)0;
}
}
if (error) {
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
if (v3)
error = EEXIST;
else
error = EISDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
if (v3)
error = EEXIST;
else
error = ENOTDIR;
goto out;
}
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
}
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
if (fvp->v_mount != tdvp->v_mount) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
if (fvp == tdvp)
if (v3)
error = EINVAL;
else
error = ENOTEMPTY;
/*
* If source is the same as the destination (that is the
* same vnode with the same name in the same directory),
* then there is nothing to do.
*/
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
fromnd.ni_cnd.cn_namelen))
error = -1;
out:
if (!error) {
int deallocobjfrom = 0, deallocobjto = 0;
nqsrv_getl(fromnd.ni_dvp, ND_WRITE);
nqsrv_getl(tdvp, ND_WRITE);
if (tvp) {
nqsrv_getl(tvp, ND_WRITE);
if ((tvp->v_flag & VVMIO) && tvp->v_object)
deallocobjto = 1;
}
if ((fvp->v_flag & VVMIO) && fvp->v_object)
deallocobjfrom = 1;
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
if (deallocobjfrom)
vm_object_deallocate(fvp->v_object);
if (deallocobjto)
vm_object_deallocate(tvp->v_object);
} else {
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
if (tdvp == tvp)
nfsrv_vrele(tdvp);
else
nfsrv_vput(tdvp);
if (tvp)
nfsrv_vput(tvp);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
if (error == -1)
error = 0;
}
nfsrv_vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
out1:
if (fdirp) {
fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp);
nfsrv_vrele(fdirp);
}
if (tdirp) {
tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp);
nfsrv_vrele(tdirp);
}
nfsrv_vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
nfsm_reply(2 * NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
}
return (0);
nfsmout:
if (fdirp)
nfsrv_vrele(fdirp);
if (tdirp)
nfsrv_vrele(tdirp);
if (tond.ni_cnd.cn_nameiop) {
nfsrv_vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
}
if (fromnd.ni_cnd.cn_nameiop) {
nfsrv_vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
}
return (error);
}
/*
* nfs link service
*/
int
nfsrv_link(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1;
int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp, *xp, *dirp = (struct vnode *)0;
struct vattr dirfor, diraft, at;
nfsfh_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_srvnamesiz(len);
if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
nfsm_srvpostop_attr(getret, &at);
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
return (0);
}
if (vp->v_type == VDIR && (error = 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;
error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
nfsrv_vrele(dirp);
dirp = (struct vnode *)0;
}
}
if (error)
goto out1;
xp = nd.ni_vp;
if (xp != NULL) {
error = EEXIST;
goto out;
}
xp = nd.ni_dvp;
if (vp->v_mount != xp->v_mount)
error = EXDEV;
out:
if (!error) {
nqsrv_getl(vp, ND_WRITE);
nqsrv_getl(xp, ND_WRITE);
#if defined(__NetBSD__) || defined(__FreeBSD__)
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
#else
error = VOP_LINK(vp, nd.ni_dvp, &nd.ni_cnd);
#endif
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
}
out1:
if (v3)
getret = VOP_GETATTR(vp, &at, cred, procp);
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsrv_vrele(vp);
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
return (0);
}
nfsm_srvdone;
}
/*
* nfs symbolic link service
*/
int
nfsrv_symlink(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
struct vnode *ovp;
struct nameidata nd;
register struct vattr *vap = &va;
register u_long *tl;
register long t1;
struct nfsv2_sattr *sp;
char *bpos, *pathcp = (char *)0, *cp2;
struct uio io;
struct iovec iv;
int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
struct mbuf *mb, *mreq, *mb2;
struct vnode *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
int deallocobj = 0;
nd.ni_cnd.cn_nameiop = 0;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
nfsrv_vrele(dirp);
dirp = (struct vnode *)0;
}
}
if (error)
goto out;
VATTR_NULL(vap);
if (v3)
nfsm_srvsattr(vap);
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);
if (!v3) {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode);
}
*(pathcp + len2) = '\0';
if (nd.ni_vp) {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_vrele(nd.ni_vp);
error = EEXIST;
goto out;
}
nqsrv_getl(nd.ni_dvp, ND_WRITE);
if ((ovp = nd.ni_vp) && (ovp->v_flag & VVMIO) && ovp->v_object)
deallocobj = 1;
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp);
if (error == 0 && deallocobj)
vm_object_deallocate(ovp->v_object);
if (error)
nfsrv_vrele(nd.ni_startdir);
else {
if (v3) {
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW);
nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF);
nd.ni_cnd.cn_proc = procp;
nd.ni_cnd.cn_cred = cred;
error = lookup(&nd);
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(nd.ni_vp, vap, cred,
procp);
nfsrv_vput(nd.ni_vp);
}
} else
nfsrv_vrele(nd.ni_startdir);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
}
out:
if (pathcp)
FREE(pathcp, M_TEMP);
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
}
return (0);
nfsmout:
if (nd.ni_cnd.cn_nameiop) {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
}
if (dirp)
nfsrv_vrele(dirp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
if (pathcp)
FREE(pathcp, M_TEMP);
return (error);
}
/*
* nfs mkdir service
*/
int
nfsrv_mkdir(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &va;
register struct nfs_fattr *fp;
struct nameidata nd;
register caddr_t cp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
nfsrv_vrele(dirp);
dirp = (struct vnode *)0;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
if (dirp)
nfsrv_vrele(dirp);
return (0);
}
VATTR_NULL(vap);
if (v3) {
nfsm_srvsattr(vap);
} else {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
vap->va_mode = nfstov_mode(*tl++);
}
vap->va_type = VDIR;
vp = nd.ni_vp;
if (vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_vrele(vp);
error = EEXIST;
goto out;
}
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (!error) {
vp = nd.ni_vp;
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
nfsrv_vput(vp);
}
out:
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
} else {
nfsm_srvfhtom(fhp, v3);
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
return (0);
nfsmout:
if (dirp)
nfsrv_vrele(dirp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
return (error);
}
/*
* nfs rmdir service
*/
int
nfsrv_rmdir(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
struct nameidata nd;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH));
if (dirp) {
if (v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
nfsrv_vrele(dirp);
dirp = (struct vnode *)0;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
if (dirp)
nfsrv_vrele(dirp);
return (0);
}
vp = nd.ni_vp;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
/*
* No rmdir "." please.
*/
if (nd.ni_dvp == vp) {
error = EINVAL;
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT)
error = EBUSY;
out:
if (!error) {
nqsrv_getl(nd.ni_dvp, ND_WRITE);
nqsrv_getl(vp, ND_WRITE);
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_vput(vp);
}
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsrv_vrele(dirp);
}
nfsm_reply(NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
return (0);
}
nfsm_srvdone;
}
/*
* nfs readdir service
* - mallocs what it thinks is enough to read
* count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR
* - calls VOP_READDIR()
* - loops around building the reply
* if the output generated exceeds count break out of loop
* The nfsm_clget macro is used here so that the reply will be packed
* tightly in mbuf clusters.
* - it only knows that it has encountered eof when the VOP_READDIR()
* reads nothing
* - as such one readdir rpc will return eof false although you are there
* and then the next will return eof
* - it trims out records with d_fileno == 0
* this doesn't matter for Unix clients, but they might confuse clients
* for other os'.
* NB: It is tempting to set eof to true if the VOP_READDIR() reads less
* than requested, but this may not apply to all filesystems. For
* example, client NFS does not { although it is never remote mounted
* anyhow }
* The alternate call nfsrv_readdirplus() does lookups as well.
* PS: The NFS protocol spec. does not clarify what the "count" byte
* argument is a count of.. just name strings and file id's or the
* entire reply rpc or ...
* I tried just file name and id sizes and it confused the Sun client,
* so I am using the full rpc size now. The "paranoia.." comment refers
* to including the status longwords that are not a part of the dir.
* "entry" structures, but are in the rpc.
*/
struct flrep {
nfsuint64 fl_off;
u_long fl_postopok;
u_long fl_fattr[NFSX_V3FATTR / sizeof (u_long)];
u_long fl_fhok;
u_long fl_fhsize;
u_long fl_nfh[NFSX_V3FH / sizeof (u_long)];
};
int
nfsrv_readdir(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
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;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io;
struct iovec iv;
int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies;
int v3 = (nfsd->nd_flag & ND_NFSV3);
u_quad_t frev, off, toff, verf;
u_int *cookies = NULL, *cookiep;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (v3) {
nfsm_dissect(tl, u_long *, 5 * NFSX_UNSIGNED);
fxdr_hyper(tl, &toff);
tl += 2;
fxdr_hyper(tl, &verf);
tl += 2;
} else {
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
toff = fxdr_unsigned(u_quad_t, *tl++);
}
off = toff;
cnt = fxdr_unsigned(int, *tl);
siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
xfer = NFS_SRVMAXDATA(nfsd);
if (siz > xfer)
siz = xfer;
fullsiz = siz;
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
nqsrv_getl(vp, ND_READ);
if (v3) {
error = getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error && toff && verf != at.va_filerev)
error = NFSERR_BAD_COOKIE;
}
if (!error)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp);
if (error) {
nfsrv_vput(vp);
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, &at);
return (0);
}
VOP_UNLOCK(vp);
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
#ifdef __NetBSD__
ncookies = siz / (5 * NFSX_UNSIGNED); /*7 for V3, but it's an est. so*/
MALLOC(cookies, u_long *, ncookies * sizeof (u_long *), M_TEMP,
M_WAITOK);
#endif
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;
eofflag = 0;
VOP_LOCK(vp);
#ifndef __NetBSD__
if (cookies) {
free((caddr_t)cookies, M_TEMP);
cookies = NULL;
}
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
#else
error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies);
#endif
off = (off_t)io.uio_offset;
if (!cookies && !error)
error = NFSERR_PERM;
if (v3) {
getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error)
error = getret;
}
VOP_UNLOCK(vp);
if (error) {
nfsrv_vrele(vp);
free((caddr_t)rbuf, M_TEMP);
if (cookies)
free((caddr_t)cookies, M_TEMP);
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, &at);
return (0);
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
nfsrv_vrele(vp);
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) +
2 * NFSX_UNSIGNED);
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED);
txdr_hyper(&at.va_filerev, tl);
tl += 2;
} else
nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
*tl++ = nfs_false;
*tl = nfs_true;
FREE((caddr_t)rbuf, M_TEMP);
FREE((caddr_t)cookies, M_TEMP);
return (0);
}
}
/*
* Check for degenerate cases of nothing useful read.
* If so go try again
*/
cpos = rbuf;
cend = rbuf + siz;
dp = (struct dirent *)cpos;
cookiep = cookies;
#ifdef __FreeBSD__
/*
* For some reason FreeBSD's ufs_readdir() chooses to back the
* directory offset up to a block boundary, so it is necessary to
* skip over the records that preceed the requested offset. This
* requires the assumption that file offset cookies monotonically
* increase.
*/
while (cpos < cend && ncookies > 0 &&
(dp->d_fileno == 0 || ((u_quad_t)(*cookiep)) <= toff)) {
#else
while (dp->d_fileno == 0 && cpos < cend && ncookies > 0) {
#endif
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend || ncookies == 0) {
toff = off;
siz = fullsiz;
goto again;
}
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz);
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
txdr_hyper(&at.va_filerev, tl);
}
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend && ncookies > 0) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
len += (4 * NFSX_UNSIGNED + nlen + rem);
if (v3)
len += 2 * NFSX_UNSIGNED;
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
if (v3) {
nfsm_clget;
*tl = 0;
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 */
if (v3) {
*tl = 0;
bp += NFSX_UNSIGNED;
nfsm_clget;
}
*tl = txdr_unsigned(*cookiep);
bp += NFSX_UNSIGNED;
}
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
nfsrv_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((caddr_t)rbuf, M_TEMP);
FREE((caddr_t)cookies, M_TEMP);
nfsm_srvdone;
}
int
nfsrv_readdirplus(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
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;
nfsfh_t nfh;
fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh;
struct uio io;
struct iovec iv;
struct vattr va, at, *vap = &va;
struct nfs_fattr *fp;
int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies;
u_quad_t frev, off, toff, verf;
u_int *cookies = NULL, *cookiep;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 6 * NFSX_UNSIGNED);
fxdr_hyper(tl, &toff);
tl += 2;
fxdr_hyper(tl, &verf);
tl += 2;
siz = fxdr_unsigned(int, *tl++);
cnt = fxdr_unsigned(int, *tl);
off = toff;
siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
xfer = NFS_SRVMAXDATA(nfsd);
if (siz > xfer)
siz = xfer;
fullsiz = siz;
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
error = getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error && toff && verf != at.va_filerev)
error = NFSERR_BAD_COOKIE;
if (!error) {
nqsrv_getl(vp, ND_READ);
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp);
}
if (error) {
nfsrv_vput(vp);
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
VOP_UNLOCK(vp);
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
#ifdef __NetBSD__
ncookies = siz / (7 * NFSX_UNSIGNED);
MALLOC(cookies, u_long *, ncookies * sizeof (u_long *), M_TEMP,
M_WAITOK);
#endif
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;
eofflag = 0;
VOP_LOCK(vp);
#ifndef __NetBSD__
if (cookies) {
free((caddr_t)cookies, M_TEMP);
cookies = NULL;
}
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
#else
error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies);
#endif
off = (u_quad_t)io.uio_offset;
getret = VOP_GETATTR(vp, &at, cred, procp);
VOP_UNLOCK(vp);
if (!cookies && !error)
error = NFSERR_PERM;
if (!error)
error = getret;
if (error) {
nfsrv_vrele(vp);
if (cookies)
free((caddr_t)cookies, M_TEMP);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
nfsrv_vrele(vp);
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED);
txdr_hyper(&at.va_filerev, tl);
tl += 2;
*tl++ = nfs_false;
*tl = nfs_true;
FREE((caddr_t)cookies, 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;
dp = (struct dirent *)cpos;
cookiep = cookies;
#ifdef __FreeBSD__
/*
* For some reason FreeBSD's ufs_readdir() chooses to back the
* directory offset up to a block boundary, so it is necessary to
* skip over the records that preceed the requested offset. This
* requires the assumption that file offset cookies monotonically
* increase.
*/
while (cpos < cend && ncookies > 0 &&
(dp->d_fileno == 0 || ((u_quad_t)(*cookiep)) <= toff)) {
#else
while (dp->d_fileno == 0 && cpos < cend && ncookies > 0) {
#endif
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend || ncookies == 0) {
toff = off;
siz = fullsiz;
goto again;
}
/*
* Probe one of the directory entries to see if the filesystem
* supports VGET.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp) == EOPNOTSUPP) {
error = NFSERR_NOTSUPP;
nfsrv_vrele(vp);
free((caddr_t)cookies, M_TEMP);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED;
nfsm_reply(cnt);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
txdr_hyper(&at.va_filerev, tl);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend && ncookies > 0) {
if (dp->d_fileno != 0) {
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)nfhp, NFSX_V3FH);
nfhp->fh_fsid =
nvp->v_mount->mnt_stat.f_fsid;
if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) {
vput(nvp);
goto invalid;
}
if (VOP_GETATTR(nvp, vap, cred, procp)) {
vput(nvp);
goto invalid;
}
vput(nvp);
/*
* If either the dircount or maxcount will be
* exceeded, get out now. Both of these lengths
* are calculated conservatively, including all
* XDR overheads.
*/
len += (7 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH +
NFSX_V3POSTOPATTR);
dirlen += (6 * NFSX_UNSIGNED + nlen + rem);
if (len > cnt || dirlen > fullsiz) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
fp = (struct nfs_fattr *)&fl.fl_fattr;
nfsm_srvfillattr(vap, fp);
fl.fl_fhsize = txdr_unsigned(NFSX_V3FH);
fl.fl_fhok = nfs_true;
fl.fl_postopok = nfs_true;
fl.fl_off.nfsuquad[0] = 0;
fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep);
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = 0;
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';
/*
* Now copy the flrep structure 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;
}
}
invalid:
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
nfsrv_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((caddr_t)cookies, M_TEMP);
FREE((caddr_t)rbuf, M_TEMP);
nfsm_srvdone;
}
/*
* nfs commit service
*/
int
nfsrv_commit(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr bfor, aft;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev, off;
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
/*
* XXX At this time VOP_FSYNC() does not accept offset and byte
* count parameters, so these arguments are useless (someday maybe).
*/
fxdr_hyper(tl, &off);
tl += 2;
cnt = fxdr_unsigned(int, *tl);
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
return (0);
}
for_ret = VOP_GETATTR(vp, &bfor, cred, procp);
error = VOP_FSYNC(vp, cred, MNT_WAIT, procp);
aft_ret = VOP_GETATTR(vp, &aft, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF);
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
if (!error) {
nfsm_build(tl, u_long *, NFSX_V3WRITEVERF);
*tl++ = txdr_unsigned(boottime.tv_sec);
*tl = txdr_unsigned(boottime.tv_usec);
} else
return (0);
nfsm_srvdone;
}
/*
* nfs statfs service
*/
int
nfsrv_statfs(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct statfs *sf;
register struct nfs_statfs *sfp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct statfs statfs;
u_quad_t frev, tval;
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
sf = &statfs;
error = VFS_STATFS(vp->v_mount, sf, procp);
getret = VOP_GETATTR(vp, &at, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3));
if (v3)
nfsm_srvpostop_attr(getret, &at);
if (error)
return (0);
nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
if (v3) {
tval = (u_quad_t)sf->f_blocks;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(&tval, &sfp->sf_tbytes);
tval = (u_quad_t)sf->f_bfree;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(&tval, &sfp->sf_fbytes);
tval = (u_quad_t)sf->f_bavail;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(&tval, &sfp->sf_abytes);
sfp->sf_tfiles.nfsuquad[0] = 0;
sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files);
sfp->sf_ffiles.nfsuquad[0] = 0;
sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
sfp->sf_afiles.nfsuquad[0] = 0;
sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
sfp->sf_invarsec = 0;
} else {
sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
sfp->sf_bsize = txdr_unsigned(sf->f_bsize);
sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
}
nfsm_srvdone;
}
/*
* nfs fsinfo service
*/
int
nfsrv_fsinfo(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_long *tl;
register struct nfsv3_fsinfo *sip;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1, pref;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
getret = VOP_GETATTR(vp, &at, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
/*
* XXX
* There should be file system VFS OP(s) to get this information.
* For now, assume ufs.
*/
if (slp->ns_so->so_type == SOCK_DGRAM)
pref = NFS_MAXDGRAMDATA;
else
pref = NFS_MAXDATA;
sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA);
sip->fs_rtpref = txdr_unsigned(pref);
sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE);
sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA);
sip->fs_wtpref = txdr_unsigned(pref);
sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE);
sip->fs_dtpref = txdr_unsigned(pref);
sip->fs_maxfilesize.nfsuquad[0] = 0xffffffff;
sip->fs_maxfilesize.nfsuquad[1] = 0xffffffff;
sip->fs_timedelta.nfsv3_sec = 0;
sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1);
sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK |
NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
NFSV3FSINFO_CANSETTIME);
nfsm_srvdone;
}
/*
* nfs pathconf service
*/
int
nfsrv_pathconf(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct mbuf *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_long *tl;
register struct nfsv3_pathconf *pc;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1, linkmax, namemax;
int chownres, notrunc;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH))) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
return (0);
}
error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax);
if (!error)
error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax);
if (!error)
error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres);
if (!error)
error = VOP_PATHCONF(vp, _PC_NO_TRUNC, &notrunc);
getret = VOP_GETATTR(vp, &at, cred, procp);
nfsrv_vput(vp);
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF);
nfsm_srvpostop_attr(getret, &at);
if (error)
return (0);
nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF);
pc->pc_linkmax = txdr_unsigned(linkmax);
pc->pc_namemax = txdr_unsigned(namemax);
pc->pc_notrunc = txdr_unsigned(notrunc);
pc->pc_chownrestricted = txdr_unsigned(chownres);
/*
* These should probably be supported by VOP_PATHCONF(), but
* until msdosfs is exportable (why would you want to?), the
* Unix defaults should be ok.
*/
pc->pc_caseinsensitive = nfs_false;
pc->pc_casepreserving = nfs_true;
nfsm_srvdone;
}
/*
* Null operation, used by clients to ping server
*/
/* ARGSUSED */
int
nfsrv_null(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep;
caddr_t bpos;
int error = NFSERR_RETVOID, cache;
struct mbuf *mb, *mreq;
u_quad_t frev;
#ifndef nolint
cache = 0;
#endif
nfsm_reply(0);
return (0);
}
/*
* No operation, used for obsolete procedures
*/
/* ARGSUSED */
int
nfsrv_noop(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep;
caddr_t bpos;
int error, cache;
struct mbuf *mb, *mreq;
u_quad_t frev;
#ifndef nolint
cache = 0;
#endif
if (nfsd->nd_repstat)
error = nfsd->nd_repstat;
else
error = EPROCUNAVAIL;
nfsm_reply(0);
return (0);
}
/*
* Perform access checking for vnodes obtained from file handles that would
* refer to files already opened by a Unix client. You cannot just use
* vn_writechk() and VOP_ACCESS() for two reasons.
* 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case
* 2 - The owner is to be given access irrespective of mode bits 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.
*/
static int
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, we can't allow writing.
*/
if (vp->v_flag & VTEXT)
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);
}
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