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2469c867a1
freebsd-skq/sys/nfsserver/nfs_serv.c
rgrimes 2469c867a1 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. 
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
1994-05-25 09:21:21 +00:00

1930 lines
46 KiB
C
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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
*/
/*
* nfs version 2 server calls to vnode ops
* - these routines generally have 3 phases
* 1 - break down and validate rpc request in mbuf list
* 2 - do the vnode ops for the request
* (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c)
* 3 - build the rpc reply in an mbuf list
* nb:
* - do not mix the phases, since the nfsm_?? macros can return failures
* on a bad rpc or similar and do not do any vrele() or vput()'s
*
* - the nfsm_reply() macro generates an nfs rpc reply with the nfs
* error number iff error != 0 whereas
* returning an error from the server function implies a fatal error
* such as a badly constructed rpc request that should be dropped without
* a reply.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/mbuf.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <vm/vm.h>
#include <nfs/nfsv2.h>
#include <nfs/rpcv2.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nqnfs.h>
/* Defs */
#define TRUE 1
#define FALSE 0
/* Global vars */
extern u_long nfs_procids[NFS_NPROCS];
extern u_long nfs_xdrneg1;
extern u_long nfs_false, nfs_true;
nfstype nfs_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON,
NFCHR, NFNON };
/*
* nqnfs access service
*/
int
nqnfsrv_access(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache = 0, mode = 0;
char *cp2;
struct mbuf *mb, *mreq;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
if (*tl++ == nfs_true)
mode |= VREAD;
if (*tl++ == nfs_true)
mode |= VWRITE;
if (*tl == nfs_true)
mode |= VEXEC;
error = nfsrv_access(vp, mode, cred, rdonly, nfsd->nd_procp);
vput(vp);
nfsm_reply(0);
nfsm_srvdone;
}
/*
* nfs getattr service
*/
int
nfsrv_getattr(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct nfsv2_fattr *fp;
struct vattr va;
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, rdonly, cache;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
nfsm_srvdone;
}
/*
* nfs setattr service
*/
int
nfsrv_setattr(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct vattr va;
register struct 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, rdonly, cache;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev, frev2;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL));
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
nqsrv_getl(vp, NQL_WRITE);
VATTR_NULL(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 (nfsd->nd_nqlflag == NQL_NOVAL) {
if (sp->sa_nfssize != nfs_xdrneg1)
vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_nfssize);
if (sp->sa_nfsatime.nfs_sec != nfs_xdrneg1) {
#ifdef notyet
fxdr_nfstime(&sp->sa_nfsatime, &vap->va_atime);
#else
vap->va_atime.ts_sec =
fxdr_unsigned(long, sp->sa_nfsatime.nfs_sec);
vap->va_atime.ts_nsec = 0;
#endif
}
if (sp->sa_nfsmtime.nfs_sec != nfs_xdrneg1)
fxdr_nfstime(&sp->sa_nfsmtime, &vap->va_mtime);
} else {
fxdr_hyper(&sp->sa_nqsize, &vap->va_size);
fxdr_nqtime(&sp->sa_nqatime, &vap->va_atime);
fxdr_nqtime(&sp->sa_nqmtime, &vap->va_mtime);
vap->va_flags = fxdr_unsigned(u_long, sp->sa_nqflags);
}
/*
* If the size is being changed write acces is required, otherwise
* just check for a read only file system.
*/
if (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,
nfsd->nd_procp))
goto out;
}
if (error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
out:
vput(vp);
nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 2*NFSX_UNSIGNED);
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
if (nfsd->nd_nqlflag != NQL_NOVAL) {
nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
txdr_hyper(&frev2, tl);
}
nfsm_srvdone;
}
/*
* nfs lookup rpc
*/
int
nfsrv_lookup(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct nfsv2_fattr *fp;
struct nameidata nd;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
register caddr_t cp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, duration2, cache2, len;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vattr va, *vap = &va;
u_quad_t frev, frev2;
fhp = &nfh.fh_generic;
duration2 = 0;
if (nfsd->nd_nqlflag != NQL_NOVAL) {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
duration2 = fxdr_unsigned(int, *tl);
}
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
nfsm_reply(0);
nqsrv_getl(nd.ni_startdir, NQL_READ);
vrele(nd.ni_startdir);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
vp = nd.ni_vp;
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) {
vput(vp);
nfsm_reply(0);
}
if (duration2)
(void) nqsrv_getlease(vp, &duration2, NQL_READ, nfsd,
nam, &cache2, &frev2, cred);
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_FH + NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 5*NFSX_UNSIGNED);
if (nfsd->nd_nqlflag != NQL_NOVAL) {
if (duration2) {
nfsm_build(tl, u_long *, 5*NFSX_UNSIGNED);
*tl++ = txdr_unsigned(NQL_READ);
*tl++ = txdr_unsigned(cache2);
*tl++ = txdr_unsigned(duration2);
txdr_hyper(&frev2, tl);
} else {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = 0;
}
}
nfsm_srvfhtom(fhp);
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
nfsm_srvdone;
}
/*
* nfs readlink service
*/
int
nfsrv_readlink(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
register struct iovec *ivp = iv;
register struct mbuf *mp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, i, tlen, len;
char *cp2;
struct mbuf *mb, *mb2, *mp2 = 0, *mp3 = 0, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
len = 0;
i = 0;
while (len < NFS_MAXPATHLEN) {
MGET(mp, M_WAIT, MT_DATA);
MCLGET(mp, M_WAIT);
mp->m_len = NFSMSIZ(mp);
if (len == 0)
mp3 = mp2 = mp;
else {
mp2->m_next = mp;
mp2 = mp;
}
if ((len+mp->m_len) > NFS_MAXPATHLEN) {
mp->m_len = NFS_MAXPATHLEN-len;
len = NFS_MAXPATHLEN;
} else
len += mp->m_len;
ivp->iov_base = mtod(mp, caddr_t);
ivp->iov_len = mp->m_len;
i++;
ivp++;
}
uiop->uio_iov = iv;
uiop->uio_iovcnt = i;
uiop->uio_offset = 0;
uiop->uio_resid = len;
uiop->uio_rw = UIO_READ;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) {
m_freem(mp3);
nfsm_reply(0);
}
if (vp->v_type != VLNK) {
error = EINVAL;
goto out;
}
nqsrv_getl(vp, NQL_READ);
error = VOP_READLINK(vp, uiop, cred);
out:
vput(vp);
if (error)
m_freem(mp3);
nfsm_reply(NFSX_UNSIGNED);
if (uiop->uio_resid > 0) {
len -= uiop->uio_resid;
tlen = nfsm_rndup(len);
nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len);
}
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = txdr_unsigned(len);
mb->m_next = mp3;
nfsm_srvdone;
}
/*
* nfs read service
*/
int
nfsrv_read(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct iovec *iv;
struct iovec *iv2;
register struct mbuf *m;
register struct nfsv2_fattr *fp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, i, cnt, len, left, siz, tlen;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct mbuf *m2;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
struct vattr va, *vap = &va;
off_t off;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (nfsd->nd_nqlflag == NQL_NOVAL) {
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
off = (off_t)fxdr_unsigned(u_long, *tl);
} else {
nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
fxdr_hyper(tl, &off);
}
nfsm_srvstrsiz(cnt, NFS_MAXDATA);
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
if (vp->v_type != VREG) {
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
vput(vp);
nfsm_reply(0);
}
nqsrv_getl(vp, NQL_READ);
if ((error = nfsrv_access(vp, VREAD, cred, rdonly, nfsd->nd_procp)) &&
(error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp))) {
vput(vp);
nfsm_reply(0);
}
if (error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
if (off >= vap->va_size)
cnt = 0;
else if ((off + cnt) > vap->va_size)
cnt = nfsm_rndup(vap->va_size - off);
nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)+NFSX_UNSIGNED+nfsm_rndup(cnt));
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
len = left = cnt;
if (cnt > 0) {
/*
* Generate the mbuf list with the uio_iov ref. to it.
*/
i = 0;
m = m2 = mb;
MALLOC(iv, struct iovec *,
((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec),
M_TEMP, M_WAITOK);
iv2 = iv;
while (left > 0) {
siz = min(M_TRAILINGSPACE(m), left);
if (siz > 0) {
m->m_len += siz;
iv->iov_base = bpos;
iv->iov_len = siz;
iv++;
i++;
left -= siz;
}
if (left > 0) {
MGET(m, M_WAIT, MT_DATA);
MCLGET(m, M_WAIT);
m->m_len = 0;
m2->m_next = m;
m2 = m;
bpos = mtod(m, caddr_t);
}
}
uiop->uio_iov = iv2;
uiop->uio_iovcnt = i;
uiop->uio_offset = off;
uiop->uio_resid = cnt;
uiop->uio_rw = UIO_READ;
uiop->uio_segflg = UIO_SYSSPACE;
error = VOP_READ(vp, uiop, IO_NODELOCKED, cred);
off = uiop->uio_offset;
FREE((caddr_t)iv2, M_TEMP);
if (error || (error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp))) {
m_freem(mreq);
vput(vp);
nfsm_reply(0);
}
} else
uiop->uio_resid = 0;
vput(vp);
nfsm_srvfillattr;
len -= uiop->uio_resid;
tlen = nfsm_rndup(len);
if (cnt != tlen || tlen != len)
nfsm_adj(mb, cnt-tlen, tlen-len);
*tl = txdr_unsigned(len);
nfsm_srvdone;
}
/*
* nfs write service
*/
int
nfsrv_write(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct iovec *ivp;
register struct mbuf *mp;
register struct nfsv2_fattr *fp;
struct iovec iv[NFS_MAXIOVEC];
struct vattr va;
register struct vattr *vap = &va;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, siz, len, xfer;
int ioflags = IO_SYNC | IO_NODELOCKED;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
off_t off;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED);
if (nfsd->nd_nqlflag == NQL_NOVAL) {
off = (off_t)fxdr_unsigned(u_long, *++tl);
tl += 2;
} else {
fxdr_hyper(tl, &off);
tl += 2;
if (fxdr_unsigned(u_long, *tl++))
ioflags |= IO_APPEND;
}
len = fxdr_unsigned(long, *tl);
if (len > NFS_MAXDATA || len <= 0) {
error = EBADRPC;
nfsm_reply(0);
}
if (dpos == (mtod(md, caddr_t)+md->m_len)) {
mp = md->m_next;
if (mp == NULL) {
error = EBADRPC;
nfsm_reply(0);
}
} else {
mp = md;
siz = dpos-mtod(mp, caddr_t);
mp->m_len -= siz;
NFSMADV(mp, siz);
}
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
if (vp->v_type != VREG) {
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
vput(vp);
nfsm_reply(0);
}
nqsrv_getl(vp, NQL_WRITE);
if (error = nfsrv_access(vp, VWRITE, cred, rdonly, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
uiop->uio_resid = 0;
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
/*
* Do up to NFS_MAXIOVEC mbufs of write each iteration of the
* loop until done.
*/
while (len > 0 && uiop->uio_resid == 0) {
ivp = iv;
siz = 0;
uiop->uio_iov = ivp;
uiop->uio_iovcnt = 0;
uiop->uio_offset = off;
while (len > 0 && uiop->uio_iovcnt < NFS_MAXIOVEC && mp != NULL) {
ivp->iov_base = mtod(mp, caddr_t);
if (len < mp->m_len)
ivp->iov_len = xfer = len;
else
ivp->iov_len = xfer = mp->m_len;
#ifdef notdef
/* Not Yet .. */
if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0)
ivp->iov_op = NULL; /* what should it be ?? */
else
ivp->iov_op = NULL;
#endif
uiop->uio_iovcnt++;
ivp++;
len -= xfer;
siz += xfer;
mp = mp->m_next;
}
if (len > 0 && mp == NULL) {
error = EBADRPC;
vput(vp);
nfsm_reply(0);
}
uiop->uio_resid = siz;
if (error = VOP_WRITE(vp, uiop, ioflags, cred)) {
vput(vp);
nfsm_reply(0);
}
off = uiop->uio_offset;
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
if (nfsd->nd_nqlflag != NQL_NOVAL) {
nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
txdr_hyper(&vap->va_filerev, tl);
}
nfsm_srvdone;
}
/*
* nfs create service
* now does a truncate to 0 length via. setattr if it already exists
*/
int
nfsrv_create(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct nfsv2_fattr *fp;
struct vattr va;
register struct 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;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
nd.ni_cnd.cn_nameiop = 0;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
nfsm_reply(0);
VATTR_NULL(vap);
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL));
/*
* Iff doesn't exist, create it
* otherwise just truncate to 0 length
* should I set the mode too ??
*/
if (nd.ni_vp == NULL) {
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);
if (nfsd->nd_nqlflag == NQL_NOVAL)
rdev = fxdr_unsigned(long, sp->sa_nfssize);
else
rdev = fxdr_unsigned(long, sp->sa_nqrdev);
if (vap->va_type == VREG || vap->va_type == VSOCK) {
vrele(nd.ni_startdir);
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
if (error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap))
nfsm_reply(0);
FREE(nd.ni_cnd.cn_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.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
error = ENXIO;
goto out;
#endif /* FIFO */
} else if (error = suser(cred, (u_short *)0)) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
goto out;
} else
vap->va_rdev = (dev_t)rdev;
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
if (error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) {
vrele(nd.ni_startdir);
nfsm_reply(0);
}
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART);
nd.ni_cnd.cn_proc = nfsd->nd_procp;
nd.ni_cnd.cn_cred = nfsd->nd_procp->p_ucred;
if (error = lookup(&nd)) {
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
nfsm_reply(0);
}
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
if (nd.ni_cnd.cn_flags & ISSYMLINK) {
vrele(nd.ni_dvp);
vput(nd.ni_vp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
error = EINVAL;
nfsm_reply(0);
}
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
error = ENXIO;
goto out;
}
vp = nd.ni_vp;
} else {
vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
vp = nd.ni_vp;
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nfsd->nd_nqlflag == NQL_NOVAL) {
tsize = fxdr_unsigned(long, sp->sa_nfssize);
if (tsize != -1)
vap->va_size = (u_quad_t)tsize;
else
vap->va_size = -1;
} else
fxdr_hyper(&sp->sa_nqsize, &vap->va_size);
if (vap->va_size != -1) {
if (error = nfsrv_access(vp, VWRITE, cred,
(nd.ni_cnd.cn_flags & RDONLY), nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
nqsrv_getl(vp, NQL_WRITE);
if (error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
}
}
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) {
vput(vp);
nfsm_reply(0);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfhtom(fhp);
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
return (error);
nfsmout:
if (nd.ni_cnd.cn_nameiop || nd.ni_cnd.cn_flags)
vrele(nd.ni_startdir);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (nd.ni_vp)
vput(nd.ni_vp);
return (error);
out:
vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
nfsm_reply(0);
return (0);
}
/*
* nfs remove service
*/
int
nfsrv_remove(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct nameidata nd;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len;
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
nfsm_reply(0);
vp = nd.ni_vp;
if (vp->v_type == VDIR &&
(error = suser(cred, (u_short *)0)))
goto out;
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT) {
error = EBUSY;
goto out;
}
if (vp->v_flag & VTEXT)
(void) vnode_pager_uncache(vp);
out:
if (!error) {
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
nqsrv_getl(vp, NQL_WRITE);
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vput(vp);
}
nfsm_reply(0);
nfsm_srvdone;
}
/*
* nfs rename service
*/
int
nfsrv_rename(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len, len2;
char *cp2;
struct mbuf *mb, *mreq;
struct nameidata fromnd, tond;
struct vnode *fvp = 0, *tvp, *tdvp;
nfsv2fh_t fnfh, tnfh;
fhandle_t *ffhp, *tfhp;
u_quad_t frev;
uid_t saved_uid;
ffhp = &fnfh.fh_generic;
tfhp = &tnfh.fh_generic;
fromnd.ni_cnd.cn_nameiop = 0;
tond.ni_cnd.cn_nameiop = 0;
nfsm_srvmtofh(ffhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
/*
* Remember our original uid so that we can reset cr_uid before
* the second nfs_namei() call, in case it is remapped.
*/
saved_uid = cred->cr_uid;
fromnd.ni_cnd.cn_cred = cred;
fromnd.ni_cnd.cn_nameiop = DELETE;
fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART;
if (error = nfs_namei(&fromnd, ffhp, len, nfsd->nd_slp, nam, &md,
&dpos, nfsd->nd_procp))
nfsm_reply(0);
fvp = fromnd.ni_vp;
nfsm_srvmtofh(tfhp);
nfsm_strsiz(len2, NFS_MAXNAMLEN);
cred->cr_uid = saved_uid;
tond.ni_cnd.cn_cred = cred;
tond.ni_cnd.cn_nameiop = RENAME;
tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART;
if (error = nfs_namei(&tond, tfhp, len2, nfsd->nd_slp, nam, &md,
&dpos, nfsd->nd_procp)) {
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
vrele(fromnd.ni_dvp);
vrele(fvp);
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
error = EISDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
error = ENOTDIR;
goto out;
}
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
error = EXDEV;
goto out;
}
}
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
error = EBUSY;
goto out;
}
if (fvp->v_mount != tdvp->v_mount) {
error = EXDEV;
goto out;
}
if (fvp == tdvp)
error = EINVAL;
/*
* If source is the same as the destination (that is the
* same vnode with the same name in the same directory),
* then there is nothing to do.
*/
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
fromnd.ni_cnd.cn_namelen))
error = -1;
out:
if (!error) {
nqsrv_getl(fromnd.ni_dvp, NQL_WRITE);
nqsrv_getl(tdvp, NQL_WRITE);
if (tvp)
nqsrv_getl(tvp, NQL_WRITE);
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
} else {
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
vrele(fromnd.ni_dvp);
vrele(fvp);
}
vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
out1:
vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
nfsm_reply(0);
return (error);
nfsmout:
if (tond.ni_cnd.cn_nameiop || tond.ni_cnd.cn_flags) {
vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
}
if (fromnd.ni_cnd.cn_nameiop || fromnd.ni_cnd.cn_flags) {
vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
vrele(fromnd.ni_dvp);
vrele(fvp);
}
return (error);
}
/*
* nfs link service
*/
int
nfsrv_link(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct nameidata nd;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache, len;
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp, *xp;
nfsv2fh_t nfh, dnfh;
fhandle_t *fhp, *dfhp;
u_quad_t frev;
fhp = &nfh.fh_generic;
dfhp = &dnfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvmtofh(dfhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)))
goto out1;
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
if (error = nfs_namei(&nd, dfhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
goto out1;
xp = nd.ni_vp;
if (xp != NULL) {
error = EEXIST;
goto out;
}
xp = nd.ni_dvp;
if (vp->v_mount != xp->v_mount)
error = EXDEV;
out:
if (!error) {
nqsrv_getl(vp, NQL_WRITE);
nqsrv_getl(xp, NQL_WRITE);
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (nd.ni_vp)
vrele(nd.ni_vp);
}
out1:
vrele(vp);
nfsm_reply(0);
nfsm_srvdone;
}
/*
* nfs symbolic link service
*/
int
nfsrv_symlink(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct vattr va;
struct nameidata nd;
register 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, cache, len, len2;
char *pathcp, *cp2;
struct mbuf *mb, *mreq;
nfsv2fh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
pathcp = (char *)0;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
goto out;
nfsm_strsiz(len2, NFS_MAXPATHLEN);
MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK);
iv.iov_base = pathcp;
iv.iov_len = len2;
io.uio_resid = len2;
io.uio_offset = 0;
io.uio_iov = &iv;
io.uio_iovcnt = 1;
io.uio_segflg = UIO_SYSSPACE;
io.uio_rw = UIO_READ;
io.uio_procp = (struct proc *)0;
nfsm_mtouio(&io, len2);
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL));
*(pathcp + len2) = '\0';
if (nd.ni_vp) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(nd.ni_vp);
error = EEXIST;
goto out;
}
VATTR_NULL(vap);
vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode);
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp);
out:
if (pathcp)
FREE(pathcp, M_TEMP);
nfsm_reply(0);
return (error);
nfsmout:
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (nd.ni_vp)
vrele(nd.ni_vp);
if (pathcp)
FREE(pathcp, M_TEMP);
return (error);
}
/*
* nfs mkdir service
*/
int
nfsrv_mkdir(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
struct vattr va;
register struct 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, cache, len;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
nfsm_reply(0);
nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
VATTR_NULL(vap);
vap->va_type = VDIR;
vap->va_mode = nfstov_mode(*tl++);
vp = nd.ni_vp;
if (vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(vp);
error = EEXIST;
nfsm_reply(0);
}
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
if (error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap))
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, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfhtom(fhp);
nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL));
nfsm_srvfillattr;
return (error);
nfsmout:
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (nd.ni_vp)
vrele(nd.ni_vp);
return (error);
}
/*
* nfs rmdir service
*/
int
nfsrv_rmdir(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, cache, len;
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct nameidata nd;
u_quad_t frev;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvstrsiz(len, NFS_MAXNAMLEN);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp))
nfsm_reply(0);
vp = nd.ni_vp;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
/*
* No rmdir "." please.
*/
if (nd.ni_dvp == vp) {
error = EINVAL;
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT)
error = EBUSY;
out:
if (!error) {
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
nqsrv_getl(vp, NQL_WRITE);
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vput(vp);
}
nfsm_reply(0);
nfsm_srvdone;
}
/*
* nfs readdir service
* - mallocs what it thinks is enough to read
* count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR
* - calls VOP_READDIR()
* - loops around building the reply
* if the output generated exceeds count break out of loop
* The nfsm_clget macro is used here so that the reply will be packed
* tightly in mbuf clusters.
* - it only knows that it has encountered eof when the VOP_READDIR()
* reads nothing
* - as such one readdir rpc will return eof false although you are there
* and then the next will return eof
* - it trims out records with d_fileno == 0
* this doesn't matter for Unix clients, but they might confuse clients
* for other os'.
* NB: It is tempting to set eof to true if the VOP_READDIR() reads less
* than requested, but this may not apply to all filesystems. For
* example, client NFS does not { although it is never remote mounted
* anyhow }
* The alternate call nqnfsrv_readdirlook() does lookups as well.
* PS: The NFS protocol spec. does not clarify what the "count" byte
* argument is a count of.. just name strings and file id's or the
* entire reply rpc or ...
* I tried just file name and id sizes and it confused the Sun client,
* so I am using the full rpc size now. The "paranoia.." comment refers
* to including the status longwords that are not a part of the dir.
* "entry" structures, but are in the rpc.
*/
struct flrep {
u_long fl_cachable;
u_long fl_duration;
u_long fl_frev[2];
nfsv2fh_t fl_nfh;
u_long fl_fattr[NFSX_NQFATTR / sizeof (u_long)];
};
int
nfsrv_readdir(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register char *bp, *be;
register struct mbuf *mp;
register struct dirent *dp;
register caddr_t cp;
register u_long *tl;
register long t1;
caddr_t bpos;
struct mbuf *mb, *mb2, *mreq, *mp2;
char *cpos, *cend, *cp2, *rbuf;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct uio io;
struct iovec iv;
int len, nlen, rem, xfer, tsiz, i, error = 0;
int siz, cnt, fullsiz, eofflag, rdonly, cache;
u_quad_t frev;
u_long on, off, toff;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED);
toff = fxdr_unsigned(u_long, *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, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
VOP_UNLOCK(vp);
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
again:
iv.iov_base = rbuf;
iv.iov_len = fullsiz;
io.uio_iov = &iv;
io.uio_iovcnt = 1;
io.uio_offset = (off_t)off;
io.uio_resid = fullsiz;
io.uio_segflg = UIO_SYSSPACE;
io.uio_rw = UIO_READ;
io.uio_procp = (struct proc *)0;
error = VOP_READDIR(vp, &io, cred);
off = (off_t)io.uio_offset;
if (error) {
vrele(vp);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(0);
}
if (io.uio_resid < fullsiz)
eofflag = 0;
else
eofflag = 1;
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 dirent *)cpos;
while (cpos < cend && dp->d_fileno == 0) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
if (cpos >= cend) {
toff = off;
siz = fullsiz;
on = 0;
goto again;
}
cpos = rbuf + on;
cend = rbuf + siz;
dp = (struct dirent *)cpos;
len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(siz);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
len += (4*NFSX_UNSIGNED + nlen + rem);
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a long boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
nfsm_clget;
/* Finish off the record */
toff += dp->d_reclen;
*tl = txdr_unsigned(toff);
bp += NFSX_UNSIGNED;
} else
toff += dp->d_reclen;
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
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(rbuf, M_TEMP);
nfsm_srvdone;
}
int
nqnfsrv_readdirlook(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register char *bp, *be;
register struct mbuf *mp;
register struct dirent *dp;
register caddr_t cp;
register u_long *tl;
register long t1;
caddr_t bpos;
struct mbuf *mb, *mb2, *mreq, *mp2;
char *cpos, *cend, *cp2, *rbuf;
struct vnode *vp, *nvp;
struct flrep fl;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct uio io;
struct iovec iv;
struct vattr va, *vap = &va;
struct nfsv2_fattr *fp;
int len, nlen, rem, xfer, tsiz, i, error = 0, duration2, cache2;
int siz, cnt, fullsiz, eofflag, rdonly, cache;
u_quad_t frev, frev2;
u_long on, off, toff;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED);
toff = fxdr_unsigned(u_long, *tl++);
off = (toff & ~(NFS_DIRBLKSIZ-1));
on = (toff & (NFS_DIRBLKSIZ-1));
cnt = fxdr_unsigned(int, *tl++);
duration2 = fxdr_unsigned(int, *tl);
siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1));
if (cnt > NFS_MAXREADDIR)
siz = NFS_MAXREADDIR;
fullsiz = siz;
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) {
vput(vp);
nfsm_reply(0);
}
VOP_UNLOCK(vp);
MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
again:
iv.iov_base = rbuf;
iv.iov_len = fullsiz;
io.uio_iov = &iv;
io.uio_iovcnt = 1;
io.uio_offset = (off_t)off;
io.uio_resid = fullsiz;
io.uio_segflg = UIO_SYSSPACE;
io.uio_rw = UIO_READ;
io.uio_procp = (struct proc *)0;
error = VOP_READDIR(vp, &io, cred);
off = (u_long)io.uio_offset;
if (error) {
vrele(vp);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(0);
}
if (io.uio_resid < fullsiz)
eofflag = 0;
else
eofflag = 1;
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 dirent *)cpos;
while (cpos < cend && dp->d_fileno == 0) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
if (cpos >= cend) {
toff = off;
siz = fullsiz;
on = 0;
goto again;
}
cpos = rbuf + on;
cend = rbuf + siz;
dp = (struct dirent *)cpos;
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(siz);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
/*
* For readdir_and_lookup get the vnode using
* the file number.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp))
goto invalid;
bzero((caddr_t)&fl.fl_nfh, sizeof (nfsv2fh_t));
fl.fl_nfh.fh_generic.fh_fsid =
nvp->v_mount->mnt_stat.f_fsid;
if (VFS_VPTOFH(nvp, &fl.fl_nfh.fh_generic.fh_fid)) {
vput(nvp);
goto invalid;
}
if (duration2) {
(void) nqsrv_getlease(nvp, &duration2, NQL_READ,
nfsd, nam, &cache2, &frev2, cred);
fl.fl_duration = txdr_unsigned(duration2);
fl.fl_cachable = txdr_unsigned(cache2);
txdr_hyper(&frev2, fl.fl_frev);
} else
fl.fl_duration = 0;
if (VOP_GETATTR(nvp, vap, cred, nfsd->nd_procp)) {
vput(nvp);
goto invalid;
}
vput(nvp);
fp = (struct nfsv2_fattr *)&fl.fl_fattr;
nfsm_srvfillattr;
len += (4*NFSX_UNSIGNED + nlen + rem + NFSX_FH
+ NFSX_NQFATTR);
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
/*
* For readdir_and_lookup copy the stuff out.
*/
xfer = sizeof (struct flrep);
cp = (caddr_t)&fl;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a long boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
nfsm_clget;
/* Finish off the record */
toff += dp->d_reclen;
*tl = txdr_unsigned(toff);
bp += NFSX_UNSIGNED;
} else
invalid:
toff += dp->d_reclen;
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
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(rbuf, M_TEMP);
nfsm_srvdone;
}
/*
* nfs statfs service
*/
int
nfsrv_statfs(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
register struct statfs *sf;
register struct nfsv2_statfs *sfp;
register u_long *tl;
register long t1;
caddr_t bpos;
int error = 0, rdonly, cache = 0, isnq;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp;
nfsv2fh_t nfh;
fhandle_t *fhp;
struct statfs statfs;
u_quad_t frev;
fhp = &nfh.fh_generic;
isnq = (nfsd->nd_nqlflag != NQL_NOVAL);
nfsm_srvmtofh(fhp);
if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly))
nfsm_reply(0);
sf = &statfs;
error = VFS_STATFS(vp->v_mount, sf, nfsd->nd_procp);
vput(vp);
nfsm_reply(NFSX_STATFS(isnq));
nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS(isnq));
sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
sfp->sf_bsize = txdr_unsigned(sf->f_bsize);
sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
if (isnq) {
sfp->sf_files = txdr_unsigned(sf->f_files);
sfp->sf_ffree = txdr_unsigned(sf->f_ffree);
}
nfsm_srvdone;
}
/*
* Null operation, used by clients to ping server
*/
/* ARGSUSED */
int
nfsrv_null(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
caddr_t bpos;
int error = VNOVAL, cache = 0;
struct mbuf *mb, *mreq;
u_quad_t frev;
nfsm_reply(0);
return (error);
}
/*
* No operation, used for obsolete procedures
*/
/* ARGSUSED */
int
nfsrv_noop(nfsd, mrep, md, dpos, cred, nam, mrq)
struct nfsd *nfsd;
struct mbuf *mrep, *md;
caddr_t dpos;
struct ucred *cred;
struct mbuf *nam, **mrq;
{
caddr_t bpos;
int error, cache = 0;
struct mbuf *mb, *mreq;
u_quad_t frev;
if (nfsd->nd_repstat)
error = nfsd->nd_repstat;
else
error = EPROCUNAVAIL;
nfsm_reply(0);
return (error);
}
/*
* Perform access checking for vnodes obtained from file handles that would
* refer to files already opened by a Unix client. You cannot just use
* vn_writechk() and VOP_ACCESS() for two reasons.
* 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case
* 2 - The owner is to be given access irrespective of mode bits so that
* processes that chmod after opening a file don't break. I don't like
* this because it opens a security hole, but since the nfs server opens
* a security hole the size of a barn door anyhow, what the heck.
*/
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, 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);
}
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