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src/sys/nfs/nfs_serv.c

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/* $OpenBSD: nfs_serv.c,v 1.126 2024/05/01 13:15:59 jsg Exp $ */
/* $NetBSD: nfs_serv.c,v 1.34 1997/05/12 23:37:12 fvdl Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. 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 8.7 (Berkeley) 5/14/95
*/
/*
* 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 use of the nfsm_?? functions can cause
* us to return failures on a bad rpc or similar without doing any
* vrele() or vput()'s
* - the nfsm_reply() function 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, we do not return after nfsm_reply() 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/namei.h>
#include <sys/vnode.h>
#include <sys/lock.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/pool.h>
#include <sys/unistd.h>
#include <ufs/ufs/dir.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfs_var.h>
#include <nfs/nfsm_subs.h>
/* Global vars */
extern u_int32_t nfs_xdrneg1;
extern u_int32_t nfs_false, nfs_true;
extern const enum vtype nv3tov_type[8];
extern struct nfsstats nfsstats;
int nfsrv_access(struct vnode *, int, struct ucred *, int, struct proc *, int);
static inline int
nfsm_reply(struct nfsm_info *infop, struct nfsrv_descript *nfsd,
struct nfssvc_sock *slp, struct mbuf **mrq, int error, int statuslen)
{
nfsd->nd_repstat = error;
if (error && !infop->nmi_v3)
statuslen = 0;
(void)nfs_rephead(statuslen, nfsd, slp, error,
&infop->nmi_mreq, &infop->nmi_mb);
if (infop->nmi_mrep != NULL) {
m_freem(infop->nmi_mrep);
infop->nmi_mrep = NULL;
}
*mrq = infop->nmi_mreq;
if (error && (!infop->nmi_v3 || error == EBADRPC))
return error;
return 0;
}
static inline int
nfsm_srvmtofh1(struct nfsm_info *infop, struct nfsrv_descript *nfsd,
struct nfssvc_sock *slp, struct mbuf **mrq)
{
if (infop->nmi_v3) {
uint32_t *tl = (uint32_t *)nfsm_dissect(infop, NFSX_UNSIGNED);
if (tl == NULL)
return 0; /* *infop->nmi_errorp set */
if (fxdr_unsigned(int, *tl) != NFSX_V3FH) {
*infop->nmi_errorp = EBADRPC;
return nfsm_reply(infop, nfsd, slp, mrq,
*infop->nmi_errorp, 0);
}
}
return 0;
}
static inline int
nfsm_srvmtofh2(struct nfsm_info *infop, fhandle_t *fhp)
{
uint32_t *tl = (uint32_t *)nfsm_dissect(infop, NFSX_V3FH);
if (tl == NULL)
return 1;
bcopy(tl, fhp, NFSX_V3FH);
if (infop->nmi_v3 == 0) {
if (nfsm_adv(infop, NFSX_V2FH - NFSX_V3FH) != 0)
return 1;
}
return 0;
}
/*
* nfs v3 access service
*/
int
nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct nfsm_info info;
struct ucred *cred = &nfsd->nd_cr;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
u_int32_t *tl;
int error = 0, rdonly, getret;
struct vattr va;
u_long testmode, nfsmode;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, 1, NULL, &info);
error = 0;
goto nfsmout;
}
nfsmode = fxdr_unsigned(u_int32_t, *tl);
if ((nfsmode & NFSV3ACCESS_READ) &&
nfsrv_access(vp, VREAD, cred, rdonly, procp, 0))
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, 0))
nfsmode &= ~testmode;
if (vp->v_type == VDIR)
testmode = NFSV3ACCESS_LOOKUP;
else
testmode = NFSV3ACCESS_EXECUTE;
if ((nfsmode & testmode) &&
nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0))
nfsmode &= ~testmode;
getret = VOP_GETATTR(vp, &va, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(1) + NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &va, &info);
tl = nfsm_build(&info.nmi_mb, NFSX_UNSIGNED);
*tl = txdr_unsigned(nfsmode);
nfsmout:
return(error);
}
/*
* nfs getattr service
*/
int
nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct nfsm_info info;
struct ucred *cred = &nfsd->nd_cr;
struct nfs_fattr *fp;
struct vattr va;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
int error = 0, rdonly;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
error = 0;
goto nfsmout;
}
error = VOP_GETATTR(vp, &va, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)) != 0)
return 0;
if (error) {
error = 0;
goto nfsmout;
}
fp = nfsm_build(&info.nmi_mb, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
nfsm_srvfattr(nfsd, &va, fp);
nfsmout:
return(error);
}
/*
* nfs setattr service
*/
int
nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct nfsm_info info;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, preat;
struct nfsv2_sattr *sp;
struct nfs_fattr *fp;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
u_int32_t *tl;
int error = 0, rdonly, preat_ret = 1, postat_ret = 1;
int gcheck = 0;
struct timespec guard;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
VATTR_NULL(&va);
if (info.nmi_v3) {
va.va_vaflags |= VA_UTIMES_NULL;
error = nfsm_srvsattr(&info.nmi_md, &va, info.nmi_mrep, &info.nmi_dpos);
if (error)
goto nfsmout;
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
gcheck = fxdr_unsigned(int, *tl);
if (gcheck) {
tl = (uint32_t *)nfsm_dissect(&info, 2 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
fxdr_nfsv3time(tl, &guard);
}
} else {
sp = (struct nfsv2_sattr *)nfsm_dissect(&info, NFSX_V2SATTR);
if (sp == NULL)
goto nfsmout;
/*
* Nah nah nah nah na nah
* There is a bug in the Sun client that puts 0xffff in the mode
* field of sattr when it should put in 0xffffffff. The u_short
* doesn't sign extend.
* --> check the low order 2 bytes for 0xffff
*/
if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
va.va_mode = nfstov_mode(sp->sa_mode);
if (sp->sa_uid != nfs_xdrneg1)
va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
if (sp->sa_gid != nfs_xdrneg1)
va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
if (sp->sa_size != nfs_xdrneg1)
va.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, &va.va_atime);
#else
va.va_atime.tv_sec =
fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
va.va_atime.tv_nsec = 0;
#endif
}
if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1)
fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime);
}
/*
* Now that we have all the fields, lets do it.
*/
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
2 * NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvwcc(nfsd, preat_ret, &preat, postat_ret, &va, &info);
error = 0;
goto nfsmout;
}
if (info.nmi_v3) {
error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp);
if (!error && gcheck &&
(preat.va_ctime.tv_sec != guard.tv_sec ||
preat.va_ctime.tv_nsec != guard.tv_nsec))
error = NFSERR_NOT_SYNC;
if (error) {
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvwcc(nfsd, preat_ret, &preat, postat_ret, &va,
&info);
error = 0;
goto nfsmout;
}
}
/*
* If the size is being changed write access is required, otherwise
* just check for a read only file system.
*/
if (va.va_size == ((u_quad_t)((quad_t) -1))) {
if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
error = EROFS;
goto out;
}
} else {
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
} else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly,
procp, 1)) != 0)
goto out;
}
error = VOP_SETATTR(vp, &va, cred, procp);
postat_ret = VOP_GETATTR(vp, &va, cred, procp);
if (!error)
error = postat_ret;
out:
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCORFATTR(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvwcc(nfsd, preat_ret, &preat, postat_ret, &va,
&info);
error = 0;
goto nfsmout;
} else {
fp = nfsm_build(&info.nmi_mb, NFSX_V2FATTR);
nfsm_srvfattr(nfsd, &va, fp);
}
nfsmout:
return(error);
}
static inline int
nfsm_srvnamesiz(struct nfsm_info *infop, int *lenp)
{
int len;
uint32_t *tl = (uint32_t *)nfsm_dissect(infop, NFSX_UNSIGNED);
if (tl == NULL)
return 1;
len = fxdr_unsigned(int32_t, *tl);
if (len > NFS_MAXNAMLEN)
*infop->nmi_errorp = NFSERR_NAMETOL;
else if (len <= 0)
*infop->nmi_errorp = EBADRPC;
else {
*infop->nmi_errorp = 0;
*lenp = len;
}
return 0;
}
/*
* nfs lookup rpc
*/
int
nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfs_fattr *fp;
struct nameidata nd;
struct vnode *vp, *dirp;
struct nfsm_info info;
nfsfh_t nfh;
fhandle_t *fhp;
int error = 0, len, dirattr_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
struct vattr va, dirattr;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_mreq = NULL;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, LOOKUP, LOCKLEAF | SAVESTART, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md, &info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred,
procp);
vrele(dirp);
}
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3)) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, dirattr_ret, &dirattr, &info);
return (0);
}
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
vp = nd.ni_vp;
memset(fhp, 0, 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, &va, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_SRVFH(info.nmi_v3) + NFSX_POSTOPORFATTR(info.nmi_v3) +
NFSX_POSTOPATTR(info.nmi_v3)) != 0)
return 0;
if (error) {
nfsm_srvpostop_attr(nfsd, dirattr_ret, &dirattr, &info);
error = 0;
goto nfsmout;
}
nfsm_srvfhtom(&info.nmi_mb, fhp, info.nmi_v3);
if (v3) {
nfsm_srvpostop_attr(nfsd, 0, &va, &info);
nfsm_srvpostop_attr(nfsd, dirattr_ret, &dirattr, &info);
} else {
fp = nfsm_build(&info.nmi_mb, NFSX_V2FATTR);
nfsm_srvfattr(nfsd, &va, fp);
}
nfsmout:
return(error);
}
/*
* nfs readlink service
*/
int
nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct iovec iov;
struct mbuf *mp = NULL;
struct nfsm_info info;
u_int32_t *tl;
int error = 0, rdonly, tlen, len = 0, getret;
struct vnode *vp;
struct vattr attr;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio uio;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
memset(&uio, 0, sizeof(uio));
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
2 * NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, 1, NULL, &info);
error = 0;
goto nfsmout;
}
if (vp->v_type != VLNK) {
if (info.nmi_v3)
error = EINVAL;
else
error = ENXIO;
goto out;
}
MGET(mp, M_WAIT, MT_DATA);
MCLGET(mp, M_WAIT); /* MLEN < NFS_MAXPATHLEN < MCLBYTES */
mp->m_len = NFS_MAXPATHLEN;
len = NFS_MAXPATHLEN;
iov.iov_base = mtod(mp, caddr_t);
iov.iov_len = mp->m_len;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = 0;
uio.uio_resid = NFS_MAXPATHLEN;
uio.uio_rw = UIO_READ;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_procp = NULL;
error = VOP_READLINK(vp, &uio, cred);
out:
getret = VOP_GETATTR(vp, &attr, cred, procp);
vput(vp);
if (error)
m_freem(mp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) + NFSX_UNSIGNED) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvpostop_attr(nfsd, getret, &attr, &info);
if (error) {
error = 0;
goto nfsmout;
}
}
if (uio.uio_resid > 0) {
len -= uio.uio_resid;
tlen = nfsm_rndup(len);
nfsm_adj(mp, NFS_MAXPATHLEN-tlen, tlen-len);
}
tl = nfsm_build(&info.nmi_mb, NFSX_UNSIGNED);
*tl = txdr_unsigned(len);
info.nmi_mb->m_next = mp;
nfsmout:
return (error);
}
/*
* nfs read service
*/
int
nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct mbuf *m;
struct nfs_fattr *fp;
struct nfsm_info info;
u_int32_t *tl;
int i, reqlen;
int error = 0, rdonly, cnt, len, left, siz, tlen, getret = 1;
struct mbuf *m2;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
struct vattr va;
off_t off;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (info.nmi_v3) {
tl = (uint32_t *)nfsm_dissect(&info, 2 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
off = fxdr_hyper(tl);
} else {
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
off = (off_t)fxdr_unsigned(u_int32_t, *tl);
}
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
reqlen = fxdr_unsigned(int32_t, *tl);
if (reqlen > (NFS_SRVMAXDATA(nfsd)) || reqlen <= 0) {
error = EBADRPC;
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error)
goto bad;
if (vp->v_type != VREG) {
if (info.nmi_v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
if (!error) {
if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1);
}
getret = VOP_GETATTR(vp, &va, cred, procp);
if (!error)
error = getret;
if (error)
goto vbad;
if (off >= va.va_size)
cnt = 0;
else if ((off + reqlen) > va.va_size)
cnt = va.va_size - off;
else
cnt = reqlen;
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPORFATTR(info.nmi_v3) +
3 * NFSX_UNSIGNED+nfsm_rndup(cnt)) != 0)
return 0;
if (info.nmi_v3) {
tl = nfsm_build(&info.nmi_mb, NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
*tl++ = nfs_true;
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V3FATTR / sizeof (u_int32_t));
} else {
tl = nfsm_build(&info.nmi_mb, NFSX_V2FATTR + NFSX_UNSIGNED);
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V2FATTR / sizeof (u_int32_t));
}
len = left = nfsm_rndup (cnt);
if (cnt > 0) {
struct iovec *iv, *iv2;
size_t ivlen;
/*
* Generate the mbuf list with the uio_iov ref. to it.
*/
i = 0;
m = m2 = info.nmi_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);
if (left >= MINCLSIZE)
MCLGET(m, M_WAIT);
m->m_len = 0;
m2->m_next = m;
m2 = m;
}
}
iv = mallocarray(i, sizeof(*iv), M_TEMP, M_WAITOK);
ivlen = i * sizeof(*iv);
uiop->uio_iov = iv2 = iv;
m = info.nmi_mb;
left = len;
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 = len;
uiop->uio_rw = UIO_READ;
uiop->uio_segflg = UIO_SYSSPACE;
error = VOP_READ(vp, uiop, IO_NODELOCKED, cred);
off = uiop->uio_offset;
free(iv2, M_TEMP, ivlen);
if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){
if (!error)
error = getret;
m_freem(info.nmi_mreq);
goto vbad;
}
} else
uiop->uio_resid = 0;
vput(vp);
nfsm_srvfattr(nfsd, &va, fp);
tlen = len - uiop->uio_resid;
cnt = cnt < tlen ? cnt : tlen;
tlen = nfsm_rndup (cnt);
if (len != tlen || tlen != cnt)
nfsm_adj(info.nmi_mb, len - tlen, tlen - cnt);
if (info.nmi_v3) {
*tl++ = txdr_unsigned(cnt);
if (len < reqlen)
*tl++ = nfs_true;
else
*tl++ = nfs_false;
}
*tl = txdr_unsigned(cnt);
nfsmout:
return(error);
vbad:
vput(vp);
bad:
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &va, &info);
return (0);
}
/*
* nfs write service
*/
int
nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfsm_info info;
int i, cnt;
struct mbuf *mp;
struct nfs_fattr *fp;
struct timeval boottime;
struct vattr va, forat;
u_int32_t *tl;
int error = 0, rdonly, len, forat_ret = 1;
int ioflags, aftat_ret = 1, retlen, zeroing, adjust;
int stable = NFSV3WRITE_FILESYNC;
struct vnode *vp;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
off_t off;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (info.nmi_mrep == NULL) {
*mrq = NULL;
return (0);
}
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (info.nmi_v3) {
tl = (uint32_t *)nfsm_dissect(&info, 5 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
off = fxdr_hyper(tl);
tl += 3;
stable = fxdr_unsigned(int, *tl++);
} else {
tl = (uint32_t *)nfsm_dissect(&info, 4 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
tl += 2;
}
retlen = len = fxdr_unsigned(int32_t, *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 = info.nmi_mrep;
while (mp) {
if (mp == info.nmi_md) {
zeroing = 0;
adjust = info.nmi_dpos - mtod(mp, caddr_t);
mp->m_len -= adjust;
if (mp->m_len > 0 && adjust > 0)
mp->m_data += 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;
goto bad;
}
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error)
goto bad;
if (info.nmi_v3)
forat_ret = VOP_GETATTR(vp, &forat, cred, procp);
if (vp->v_type != VREG) {
if (info.nmi_v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
goto vbad;
}
error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1);
if (error)
goto vbad;
if (len > 0) {
struct iovec *iv, *ivp;
size_t ivlen;
ivp = mallocarray(cnt, sizeof(*ivp), M_TEMP, M_WAITOK);
ivlen = cnt * sizeof(*ivp);
uiop->uio_iov = iv = ivp;
uiop->uio_iovcnt = cnt;
mp = info.nmi_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 (stable == NFSV3WRITE_UNSTABLE)
ioflags = IO_NODELOCKED;
else if (stable == NFSV3WRITE_DATASYNC)
ioflags = (IO_SYNC | IO_NODELOCKED);
else
ioflags = (IO_SYNC | IO_NODELOCKED);
uiop->uio_resid = len;
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = NULL;
uiop->uio_offset = off;
error = VOP_WRITE(vp, uiop, ioflags, cred);
nfsstats.srvvop_writes++;
free(iv, M_TEMP, ivlen);
}
aftat_ret = VOP_GETATTR(vp, &va, cred, procp);
vput(vp);
if (!error)
error = aftat_ret;
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_PREOPATTR(info.nmi_v3) + NFSX_POSTOPORFATTR(info.nmi_v3) +
2 * NFSX_UNSIGNED + NFSX_WRITEVERF(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvwcc(nfsd, forat_ret, &forat, aftat_ret, &va, &info);
if (error) {
error = 0;
goto nfsmout;
}
tl = nfsm_build(&info.nmi_mb, 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.
*/
microboottime(&boottime);
*tl++ = txdr_unsigned(boottime.tv_sec);
*tl = txdr_unsigned(boottime.tv_usec);
} else {
fp = nfsm_build(&info.nmi_mb, NFSX_V2FATTR);
nfsm_srvfattr(nfsd, &va, fp);
}
nfsmout:
return(error);
vbad:
vput(vp);
bad:
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
nfsm_srvwcc(nfsd, forat_ret, &forat, aftat_ret, &va, &info);
return (0);
}
static inline void
nfsm_srvpostop_fh(struct nfsm_info *infop, fhandle_t *fhp)
{
uint32_t *tl;
tl = nfsm_build(&infop->nmi_mb, 2 * NFSX_UNSIGNED + NFSX_V3FH);
*tl++ = nfs_true;
*tl++ = txdr_unsigned(NFSX_V3FH);
bcopy(fhp, tl, NFSX_V3FH);
}
/*
* nfs create service
* now does a truncate to 0 length via. setattr if it already exists
*/
int
nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfs_fattr *fp;
struct vattr va, dirfor, diraft;
struct nfsv2_sattr *sp;
struct nfsm_info info;
u_int32_t *tl;
struct nameidata nd;
caddr_t cp;
int error = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1;
dev_t rdev = 0;
int how, exclusive_flag = 0;
struct vnode *vp = NULL, *dirp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t tempsize;
u_char cverf[NFSX_V3CREATEVERF];
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, CREATE, LOCKPARENT | LOCKLEAF | SAVESTART, UIO_SYSSPACE,
NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
if (dirp)
vrele(dirp);
return (0);
}
VATTR_NULL(&va);
if (info.nmi_v3) {
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
how = fxdr_unsigned(int, *tl);
switch (how) {
case NFSV3CREATE_GUARDED:
if (nd.ni_vp) {
error = EEXIST;
break;
}
case NFSV3CREATE_UNCHECKED:
error = nfsm_srvsattr(&info.nmi_md, &va, info.nmi_mrep,
&info.nmi_dpos);
if (error)
goto nfsmout;
break;
case NFSV3CREATE_EXCLUSIVE:
cp = (caddr_t)nfsm_dissect(&info, NFSX_V3CREATEVERF);
if (cp == NULL)
goto nfsmout;
bcopy(cp, cverf, NFSX_V3CREATEVERF);
exclusive_flag = 1;
if (nd.ni_vp == NULL)
va.va_mode = 0;
break;
};
va.va_type = VREG;
} else {
sp = (struct nfsv2_sattr *)nfsm_dissect(&info, NFSX_V2SATTR);
if (sp == NULL)
goto nfsmout;
va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode));
if (va.va_type == VNON)
va.va_type = VREG;
va.va_mode = nfstov_mode(sp->sa_mode);
switch (va.va_type) {
case VREG:
tsize = fxdr_unsigned(int32_t, sp->sa_size);
if (tsize != -1)
va.va_size = (u_quad_t)tsize;
break;
case VCHR:
case VBLK:
case VFIFO:
rdev = (dev_t)fxdr_unsigned(int32_t, sp->sa_size);
break;
default:
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 (va.va_type == VREG || va.va_type == VSOCK) {
vrele(nd.ni_startdir);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd,
&va);
vput(nd.ni_dvp);
if (!error) {
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
if (exclusive_flag) {
exclusive_flag = 0;
VATTR_NULL(&va);
bcopy(cverf, (caddr_t)&va.va_atime,
NFSX_V3CREATEVERF);
error = VOP_SETATTR(nd.ni_vp, &va, cred,
procp);
}
}
} else if (va.va_type == VCHR || va.va_type == VBLK ||
va.va_type == VFIFO) {
if (va.va_type == VCHR && rdev == 0xffffffff)
va.va_type = VFIFO;
if (va.va_type != VFIFO &&
(error = suser_ucred(cred))) {
vrele(nd.ni_startdir);
if (nd.ni_cnd.cn_flags & HASBUF) {
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
}
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
0) != 0)
return 0;
error = 0;
goto nfsmout;
} else
va.va_rdev = (dev_t)rdev;
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd,
&va);
vput(nd.ni_dvp);
if (error) {
vrele(nd.ni_startdir);
if (nd.ni_cnd.cn_flags & HASBUF) {
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
}
if (nfsm_reply(&info, nfsd, slp, mrq, error,
0) != 0)
return 0;
error = 0;
goto nfsmout;
}
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 = vfs_lookup(&nd)) != 0) {
if (nd.ni_cnd.cn_flags & HASBUF) {
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
}
if (nfsm_reply(&info, nfsd, slp, mrq, error,
0) != 0)
return 0;
error = 0;
goto nfsmout;
}
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
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;
if (nfsm_reply(&info, nfsd, slp, mrq, error,
0) != 0)
return 0;
error = 0;
goto nfsmout;
}
} else {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
error = ENXIO;
}
vp = nd.ni_vp;
} else {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
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 (va.va_size != -1) {
error = nfsrv_access(vp, VWRITE, cred,
(nd.ni_cnd.cn_flags & RDONLY), procp, 0);
if (!error) {
tempsize = va.va_size;
VATTR_NULL(&va);
va.va_size = tempsize;
error = VOP_SETATTR(vp, &va, cred,
procp);
}
if (error)
vput(vp);
}
}
if (!error) {
memset(fhp, 0, 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, &va, cred, procp);
vput(vp);
}
if (info.nmi_v3) {
if (exclusive_flag && !error &&
bcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF))
error = EEXIST;
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
if (nfsm_reply(&info, nfsd, slp, mrq, error, NFSX_SRVFH(info.nmi_v3) +
NFSX_FATTR(info.nmi_v3) + NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
if (!error) {
nfsm_srvpostop_fh(&info, fhp);
nfsm_srvpostop_attr(nfsd, 0, &va, &info);
}
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
} else {
nfsm_srvfhtom(&info.nmi_mb, fhp, info.nmi_v3);
fp = nfsm_build(&info.nmi_mb, NFSX_V2FATTR);
nfsm_srvfattr(nfsd, &va, fp);
}
return (0);
nfsmout:
if (dirp)
vrele(dirp);
if (nd.ni_cnd.cn_nameiop != LOOKUP) {
vrele(nd.ni_startdir);
if (nd.ni_cnd.cn_flags & HASBUF) {
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
nd.ni_cnd.cn_flags &= ~HASBUF;
}
}
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);
}
/*
* nfs v3 mknod service
*/
int
nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
struct nfsm_info info;
u_int32_t *tl;
struct nameidata nd;
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
u_int32_t major, minor;
enum vtype vtyp;
struct vnode *vp, *dirp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, CREATE, LOCKPARENT | LOCKLEAF | SAVESTART, UIO_SYSSPACE,
NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md, &info.nmi_dpos, &dirp, procp);
if (dirp)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(1)) != 0)
return 0;
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
if (dirp)
vrele(dirp);
return (0);
}
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
vtyp = nfsv3tov_type(*tl);
if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
error = NFSERR_BADTYPE;
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);
goto out;
}
VATTR_NULL(&va);
error = nfsm_srvsattr(&info.nmi_md, &va, info.nmi_mrep, &info.nmi_dpos);
if (error)
goto nfsmout;
if (vtyp == VCHR || vtyp == VBLK) {
tl = (uint32_t *)nfsm_dissect(&info, 2 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
major = fxdr_unsigned(u_int32_t, *tl++);
minor = fxdr_unsigned(u_int32_t, *tl);
va.va_rdev = makedev(major, minor);
}
/*
* Iff doesn't exist, create it.
*/
if (nd.ni_vp) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
error = EEXIST;
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(nd.ni_vp);
goto out;
}
va.va_type = vtyp;
if (vtyp == VSOCK) {
vrele(nd.ni_startdir);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
vput(nd.ni_dvp);
if (!error)
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
} else {
if (va.va_type != VFIFO &&
(error = suser_ucred(cred))) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
goto out;
}
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
vput(nd.ni_dvp);
if (error) {
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 = vfs_lookup(&nd);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
if (error)
goto out;
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;
}
}
out:
vp = nd.ni_vp;
if (!error) {
memset(fhp, 0, 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, &va, cred, procp);
vput(vp);
}
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)) != 0)
return 0;
if (!error) {
nfsm_srvpostop_fh(&info, fhp);
nfsm_srvpostop_attr(nfsd, 0, &va, &info);
}
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft, &info);
return (0);
nfsmout:
if (dirp)
vrele(dirp);
if (nd.ni_cnd.cn_nameiop) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
}
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);
}
/*
* nfs remove service
*/
int
nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
struct nfsm_info info;
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
struct vnode *vp, *dirp;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
vp = NULL;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md, &info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
else {
vrele(dirp);
dirp = NULL;
}
}
if (!error) {
vp = nd.ni_vp;
if (vp->v_type == VDIR &&
(error = suser_ucred(cred)) != 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)
uvm_vnp_uncache(vp);
out:
if (!error) {
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);
}
}
if (dirp && info.nmi_v3) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
return (0);
}
nfsmout:
return(error);
}
/*
* nfs rename service
*/
int
nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfsm_info info;
int error = 0, len, len2, fdirfor_ret = 1, fdiraft_ret = 1;
int tdirfor_ret = 1, tdiraft_ret = 1;
struct nameidata fromnd, tond;
struct vnode *fvp = NULL, *tvp, *tdvp, *fdirp = NULL;
struct vnode *tdirp = NULL;
struct vattr fdirfor, fdiraft, tdirfor, tdiraft;
nfsfh_t fnfh, tnfh;
fhandle_t *ffhp, *tfhp;
uid_t saved_uid;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
ffhp = &fnfh.fh_generic;
if (nfsm_srvmtofh2(&info, ffhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
/*
* 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;
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_SYSSPACE, NULL,
procp);
fromnd.ni_cnd.cn_cred = cred;
error = nfs_namei(&fromnd, ffhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &fdirp, procp);
if (fdirp) {
if (info.nmi_v3)
fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred,
procp);
else {
vrele(fdirp);
fdirp = NULL;
}
}
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
2 * NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvwcc(nfsd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft,
&info);
nfsm_srvwcc(nfsd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft,
&info);
if (fdirp)
vrele(fdirp);
return (0);
}
fvp = fromnd.ni_vp;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
tfhp = &tnfh.fh_generic;
if (nfsm_srvmtofh2(&info, tfhp) != 0)
goto nfsmout;
if (nfsm_strsiz(&info, &len2, NFS_MAXNAMLEN) != 0)
goto nfsmout;
cred->cr_uid = saved_uid;
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF| NOCACHE | SAVESTART,
UIO_SYSSPACE, NULL, procp);
tond.ni_cnd.cn_cred = cred;
error = nfs_namei(&tond, tfhp, len2, slp, nam, &info.nmi_md,
&info.nmi_dpos, &tdirp, procp);
if (tdirp) {
if (info.nmi_v3)
tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred,
procp);
else {
vrele(tdirp);
tdirp = NULL;
}
}
if (error) {
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 = info.nmi_v3 ? EEXIST : EISDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
error = info.nmi_v3 ? EEXIST : ENOTDIR;
goto out;
}
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
error = info.nmi_v3 ? EXDEV : ENOTEMPTY;
goto out;
}
}
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
error = info.nmi_v3 ? EXDEV : ENOTEMPTY;
goto out;
}
if (fvp->v_mount != tdvp->v_mount) {
error = info.nmi_v3 ? EXDEV : ENOTEMPTY;
goto out;
}
if (fvp == tdvp)
error = info.nmi_v3 ? EINVAL : 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) {
if (tvp) {
(void)uvm_vnp_uncache(tvp);
}
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);
if (error == -1)
error = 0;
}
vrele(tond.ni_startdir);
pool_put(&namei_pool, tond.ni_cnd.cn_pnbuf);
out1:
if (fdirp) {
fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp);
vrele(fdirp);
}
if (tdirp) {
tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp);
vrele(tdirp);
}
vrele(fromnd.ni_startdir);
pool_put(&namei_pool, fromnd.ni_cnd.cn_pnbuf);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
2 * NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvwcc(nfsd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft,
&info);
nfsm_srvwcc(nfsd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft,
&info);
}
return (0);
nfsmout:
if (fdirp)
vrele(fdirp);
if (tdirp)
vrele(tdirp);
if (tond.ni_cnd.cn_nameiop) {
vrele(tond.ni_startdir);
pool_put(&namei_pool, tond.ni_cnd.cn_pnbuf);
}
if (fromnd.ni_cnd.cn_nameiop) {
if (fromnd.ni_startdir)
vrele(fromnd.ni_startdir);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
/*
* XXX: Workaround the fact that fromnd.ni_dvp can point
* to the same vnode as fdirp.
*/
if (fromnd.ni_dvp != NULL && fromnd.ni_dvp != fdirp)
vrele(fromnd.ni_dvp);
if (fvp)
vrele(fvp);
}
return (error);
}
/*
* nfs link service
*/
int
nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct nfsm_info info;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
int error = 0, rdonly, len, dirfor_ret = 1, diraft_ret = 1;
int getret = 1;
struct vnode *vp, *xp, *dirp = NULL;
struct vattr dirfor, diraft, at;
nfsfh_t nfh, dnfh;
fhandle_t *fhp, *dfhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
dfhp = &dnfh.fh_generic;
if (nfsm_srvmtofh2(&info, dfhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
error = nfsrv_fhtovp(fhp, 0, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) +
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
error = 0;
goto nfsmout;
}
if (vp->v_type == VDIR)
goto out1;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, dfhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
vrele(dirp);
dirp = NULL;
}
}
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) {
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:
if (info.nmi_v3)
getret = VOP_GETATTR(vp, &at, cred, procp);
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
vrele(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) + NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
error = 0;
}
nfsmout:
return(error);
}
/*
* nfs symbolic link service
*/
int
nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
struct nameidata nd;
struct nfsm_info info;
struct nfsv2_sattr *sp;
char *pathcp = NULL;
struct uio io;
struct iovec iv;
int error = 0, len, pathlen, len2, dirfor_ret = 1, diraft_ret = 1;
struct vnode *dirp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, CREATE, LOCKPARENT | SAVESTART, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
vrele(dirp);
dirp = NULL;
}
}
if (error)
goto out;
VATTR_NULL(&va);
if (info.nmi_v3) {
error = nfsm_srvsattr(&info.nmi_md, &va, info.nmi_mrep,
&info.nmi_dpos);
if (error)
goto nfsmout;
}
if (nfsm_strsiz(&info, &len2, NFS_MAXPATHLEN) != 0)
goto nfsmout;
pathlen = len2 + 1;
pathcp = malloc(pathlen, 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 = NULL;
if (nfsm_mtouio(&info, &io, len2) != 0)
goto nfsmout;
if (!info.nmi_v3) {
sp = (struct nfsv2_sattr *)nfsm_dissect(&info, NFSX_V2SATTR);
if (sp == NULL)
goto nfsmout;
va.va_mode = nfstov_mode(sp->sa_mode);
}
*(pathcp + len2) = '\0';
if (nd.ni_vp) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
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;
}
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp);
if (error)
vrele(nd.ni_startdir);
else {
if (info.nmi_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 = vfs_lookup(&nd);
if (!error) {
memset(fhp, 0, 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, &va, cred,
procp);
vput(nd.ni_vp);
}
} else
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
}
out:
if (pathcp)
free(pathcp, M_TEMP, pathlen);
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
if (nfsm_reply(&info, nfsd, slp, mrq, error, NFSX_SRVFH(info.nmi_v3) +
NFSX_POSTOPATTR(info.nmi_v3) + NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
if (!error) {
nfsm_srvpostop_fh(&info, fhp);
nfsm_srvpostop_attr(nfsd, 0, &va, &info);
}
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
}
return (0);
nfsmout:
if (nd.ni_cnd.cn_nameiop) {
vrele(nd.ni_startdir);
pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf);
}
if (dirp)
vrele(dirp);
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, pathlen);
return (error);
}
/*
* nfs mkdir service
*/
int
nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
struct nfs_fattr *fp;
struct nameidata nd;
struct nfsm_info info;
u_int32_t *tl;
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
struct vnode *vp, *dirp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
if (dirp)
vrele(dirp);
return (0);
}
VATTR_NULL(&va);
if (info.nmi_v3) {
error = nfsm_srvsattr(&info.nmi_md, &va, info.nmi_mrep,
&info.nmi_dpos);
if (error)
goto nfsmout;
} else {
tl = (uint32_t *)nfsm_dissect(&info, NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
va.va_mode = nfstov_mode(*tl++);
}
va.va_type = VDIR;
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;
goto out;
}
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
if (!error) {
vp = nd.ni_vp;
memset(fhp, 0, 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, &va, cred, procp);
vput(vp);
}
out:
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
if (nfsm_reply(&info, nfsd, slp, mrq, error, NFSX_SRVFH(info.nmi_v3) +
NFSX_POSTOPATTR(info.nmi_v3) + NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
if (!error) {
nfsm_srvpostop_fh(&info, fhp);
nfsm_srvpostop_attr(nfsd, 0, &va, &info);
}
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
} else {
nfsm_srvfhtom(&info.nmi_mb, fhp, info.nmi_v3);
fp = nfsm_build(&info.nmi_mb, NFSX_V2FATTR);
nfsm_srvfattr(nfsd, &va, fp);
}
return (0);
nfsmout:
if (dirp)
vrele(dirp);
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(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfsm_info info;
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
struct vnode *vp, *dirp = NULL;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
struct nameidata nd;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (nfsm_srvnamesiz(&info, &len) != 0)
goto nfsmout;
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
}
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_SYSSPACE, NULL, procp);
nd.ni_cnd.cn_cred = cred;
error = nfs_namei(&nd, fhp, len, slp, nam, &info.nmi_md,
&info.nmi_dpos, &dirp, procp);
if (dirp) {
if (info.nmi_v3)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
if (dirp)
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;
}
/*
* A mounted on directory cannot be deleted.
*/
if (vp->v_mountedhere != NULL) {
error = EBUSY;
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT)
error = EBUSY;
out:
if (!error) {
error = VOP_RMDIR(nd.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);
}
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
}
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_WCCDATA(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvwcc(nfsd, dirfor_ret, &dirfor, diraft_ret, &diraft,
&info);
error = 0;
}
nfsmout:
return(error);
}
/*
* 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
* - 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_int32_t fl_postopok;
u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)];
u_int32_t fl_fhok;
u_int32_t fl_fhsize;
u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)];
};
int
nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct dirent *dp;
struct nfsm_info info;
u_int32_t *tl;
char *cpos, *cend, *rbuf;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io;
struct iovec iv;
int len, nlen, pad, xfer, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly;
u_quad_t off, toff, verf;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
if (info.nmi_v3) {
tl = (uint32_t *)nfsm_dissect(&info, 5 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
toff = fxdr_hyper(tl);
tl += 2;
verf = fxdr_hyper(tl);
tl += 2;
} else {
tl = (uint32_t *)nfsm_dissect(&info, 2 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
toff = fxdr_unsigned(u_quad_t, *tl++);
}
off = toff;
cnt = fxdr_unsigned(int, *tl);
xfer = NFS_SRVMAXDATA(nfsd);
if (cnt > xfer || cnt < 0)
cnt = xfer;
siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
if (siz > xfer)
siz = xfer;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
if (info.nmi_v3)
error = getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0);
if (error) {
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3)) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
VOP_UNLOCK(vp);
rbuf = malloc(fullsiz, 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 = NULL;
eofflag = 0;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_READDIR(vp, &io, cred, &eofflag);
off = (off_t)io.uio_offset;
if (info.nmi_v3) {
getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error)
error = getret;
}
VOP_UNLOCK(vp);
if (error) {
vrele(vp);
free(rbuf, M_TEMP, fullsiz);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3)) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
vrele(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) +
NFSX_COOKIEVERF(info.nmi_v3) +
2 * NFSX_UNSIGNED) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
tl = nfsm_build(&info.nmi_mb, 4 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
tl += 2;
} else
tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED);
*tl++ = nfs_false;
*tl = nfs_true;
free(rbuf, M_TEMP, fullsiz);
error = 0;
goto nfsmout;
}
}
/*
* Check for degenerate cases of nothing useful read.
* If so go try again
*/
cpos = rbuf;
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;
goto again;
}
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) +
NFSX_COOKIEVERF(info.nmi_v3) + siz) != 0)
return 0;
if (info.nmi_v3) {
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
}
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
pad = nfsm_padlen(nlen);
len += (4 * NFSX_UNSIGNED + nlen + pad);
if (info.nmi_v3)
len += 2 * NFSX_UNSIGNED;
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
tl = nfsm_build(&info.nmi_mb,
(info.nmi_v3 ? 3 : 2) * NFSX_UNSIGNED);
*tl++ = nfs_true;
if (info.nmi_v3)
txdr_hyper(dp->d_fileno, tl);
else
*tl = txdr_unsigned((u_int32_t)dp->d_fileno);
/* And copy the name */
nfsm_strtombuf(&info.nmi_mb, dp->d_name, nlen);
/* Finish off the record */
if (info.nmi_v3) {
tl = nfsm_build(&info.nmi_mb, 2*NFSX_UNSIGNED);
txdr_hyper(dp->d_off, tl);
} else {
tl = nfsm_build(&info.nmi_mb, NFSX_UNSIGNED);
*tl = txdr_unsigned((u_int32_t)dp->d_off);
}
}
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
vrele(vp);
tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED);
*tl++ = nfs_false;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
free(rbuf, M_TEMP, fullsiz);
nfsmout:
return(error);
}
int
nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct dirent *dp;
struct nfsm_info info;
u_int32_t *tl;
char *cpos, *cend, *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, pad, xfer, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly, dirlen;
u_quad_t off, toff, verf;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
tl = (uint32_t *)nfsm_dissect(&info, 6 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
off = toff = fxdr_hyper(tl);
tl += 2;
verf = fxdr_hyper(tl);
tl += 2;
siz = fxdr_unsigned(int, *tl++);
cnt = fxdr_unsigned(int, *tl);
xfer = NFS_SRVMAXDATA(nfsd);
if (cnt > xfer || cnt < 0)
cnt = xfer;
siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
if (siz > xfer)
siz = xfer;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
error = getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0);
if (error) {
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3POSTOPATTR) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
VOP_UNLOCK(vp);
rbuf = malloc(fullsiz, 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 = NULL;
eofflag = 0;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_READDIR(vp, &io, cred, &eofflag);
off = (u_quad_t)io.uio_offset;
getret = VOP_GETATTR(vp, &at, cred, procp);
VOP_UNLOCK(vp);
if (!error)
error = getret;
if (error) {
vrele(vp);
free(rbuf, M_TEMP, fullsiz);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3POSTOPATTR) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
vrele(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
2 * NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
tl = nfsm_build(&info.nmi_mb, 4 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
tl += 2;
*tl++ = nfs_false;
*tl = nfs_true;
free(rbuf, M_TEMP, fullsiz);
error = 0;
goto nfsmout;
}
}
/*
* Check for degenerate cases of nothing useful read.
* If so go try again
*/
cpos = rbuf;
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;
goto again;
}
/*
* struct READDIRPLUS3resok {
* postop_attr dir_attributes;
* cookieverf3 cookieverf;
* dirlistplus3 reply;
* }
*
* struct dirlistplus3 {
* entryplus3 *entries;
* bool eof;
* }
*/
dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED;
if (nfsm_reply(&info, nfsd, slp, mrq, error, cnt) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
pad = nfsm_padlen(nlen);
/*
* For readdir_and_lookup get the vnode using
* the file number.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp))
goto invalid;
memset(nfhp, 0, 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.
*
* Each entry:
* 2 * NFSX_UNSIGNED for fileid3
* 1 * NFSX_UNSIGNED for length of name
* nlen + pad == space the name takes up
* 2 * NFSX_UNSIGNED for the cookie
* 1 * NFSX_UNSIGNED to indicate if file handle present
* 1 * NFSX_UNSIGNED for the file handle length
* NFSX_V3FH == space our file handle takes up
* NFSX_V3POSTOPATTR == space the attributes take up
* 1 * NFSX_UNSIGNED for next pointer
*/
len += (8 * NFSX_UNSIGNED + nlen + pad + NFSX_V3FH +
NFSX_V3POSTOPATTR);
dirlen += (6 * NFSX_UNSIGNED + nlen + pad);
if (len > cnt || dirlen > fullsiz) {
eofflag = 0;
break;
}
tl = nfsm_build(&info.nmi_mb, 3 * NFSX_UNSIGNED);
*tl++ = nfs_true;
txdr_hyper(dp->d_fileno, tl);
/* And copy the name */
nfsm_strtombuf(&info.nmi_mb, dp->d_name, nlen);
/*
* Build the directory record xdr from
* the dirent entry.
*/
fp = (struct nfs_fattr *)&fl.fl_fattr;
nfsm_srvfattr(nfsd, vap, fp);
fl.fl_fhsize = txdr_unsigned(NFSX_V3FH);
fl.fl_fhok = nfs_true;
fl.fl_postopok = nfs_true;
txdr_hyper(dp->d_off, fl.fl_off.nfsuquad);
/* Now copy the flrep structure out. */
nfsm_buftombuf(&info.nmi_mb, &fl, sizeof(struct flrep));
}
invalid:
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
}
vrele(vp);
tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED);
*tl++ = nfs_false;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
free(rbuf, M_TEMP, fullsiz);
nfsmout:
return(error);
}
/*
* nfs commit service
*/
int
nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct vattr bfor, aft;
struct vnode *vp;
struct nfsm_info info;
struct timeval boottime;
nfsfh_t nfh;
fhandle_t *fhp;
u_int32_t *tl;
int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt;
u_quad_t off;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
tl = (uint32_t *)nfsm_dissect(&info, 3 * NFSX_UNSIGNED);
if (tl == NULL)
goto nfsmout;
/*
* XXX At this time VOP_FSYNC() does not accept offset and byte
* count parameters, so these arguments are useless (someday maybe).
*/
off = fxdr_hyper(tl);
tl += 2;
cnt = fxdr_unsigned(int, *tl);
if (cnt < 0)
cnt = 0;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
2 * NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvwcc(nfsd, for_ret, &bfor, aft_ret, &aft, &info);
error = 0;
goto nfsmout;
}
for_ret = VOP_GETATTR(vp, &bfor, cred, procp);
error = VOP_FSYNC(vp, cred, MNT_WAIT, procp);
aft_ret = VOP_GETATTR(vp, &aft, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3WCCDATA + NFSX_V3WRITEVERF) != 0)
return 0;
nfsm_srvwcc(nfsd, for_ret, &bfor, aft_ret, &aft, &info);
if (!error) {
tl = nfsm_build(&info.nmi_mb, NFSX_V3WRITEVERF);
microboottime(&boottime);
*tl++ = txdr_unsigned(boottime.tv_sec);
*tl = txdr_unsigned(boottime.tv_usec);
} else
error = 0;
nfsmout:
return(error);
}
/*
* nfs statfs service
*/
int
nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct statfs *sf;
struct nfs_statfs *sfp;
struct nfsm_info info;
int error = 0, rdonly, getret = 1;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct statfs statfs;
u_quad_t tval;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
sf = &statfs;
error = VFS_STATFS(vp->v_mount, sf, procp);
getret = VOP_GETATTR(vp, &at, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_POSTOPATTR(info.nmi_v3) + NFSX_STATFS(info.nmi_v3)) != 0)
return 0;
if (info.nmi_v3)
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
if (error) {
error = 0;
goto nfsmout;
}
sfp = nfsm_build(&info.nmi_mb, NFSX_STATFS(info.nmi_v3));
if (info.nmi_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);
tval = (u_quad_t)sf->f_files;
txdr_hyper(tval, &sfp->sf_tfiles);
tval = (u_quad_t)sf->f_ffree;
txdr_hyper(tval, &sfp->sf_ffiles);
txdr_hyper(tval, &sfp->sf_afiles);
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);
}
nfsmout:
return(error);
}
/*
* nfs fsinfo service
*/
int
nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfsm_info info;
struct nfsv3_fsinfo *sip;
int error = 0, rdonly, getret = 1, pref;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
getret = VOP_GETATTR(vp, &at, cred, procp);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3POSTOPATTR + NFSX_V3FSINFO) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
sip = nfsm_build(&info.nmi_mb, 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);
nfsmout:
return(error);
}
/*
* nfs pathconf service
*/
int
nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct mbuf *nam = nfsd->nd_nam;
struct ucred *cred = &nfsd->nd_cr;
struct nfsm_info info;
struct nfsv3_pathconf *pc;
int error = 0, rdonly, getret = 1;
register_t linkmax, namemax, chownres, notrunc;
struct vnode *vp;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
return 0;
else if (error != 0)
goto nfsmout;
fhp = &nfh.fh_generic;
if (nfsm_srvmtofh2(&info, fhp) != 0)
goto nfsmout;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly);
if (error) {
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_UNSIGNED) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
error = 0;
goto nfsmout;
}
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);
vput(vp);
if (nfsm_reply(&info, nfsd, slp, mrq, error,
NFSX_V3POSTOPATTR + NFSX_V3PATHCONF) != 0)
return 0;
nfsm_srvpostop_attr(nfsd, getret, &at, &info);
if (error) {
error = 0;
goto nfsmout;
}
pc = nfsm_build(&info.nmi_mb, 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;
nfsmout:
return(error);
}
/*
* Null operation, used by clients to ping server
*/
int
nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct nfsm_info info;
int error = NFSERR_RETVOID;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 0;
return (0);
}
/*
* No operation, used for obsolete procedures
*/
int
nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct proc *procp, struct mbuf **mrq)
{
struct nfsm_info info;
int error;
info.nmi_mreq = NULL;
info.nmi_mrep = nfsd->nd_mrep;
info.nmi_md = nfsd->nd_md;
info.nmi_dpos = nfsd->nd_dpos;
info.nmi_v3 = (nfsd->nd_flag & ND_NFSV3);
info.nmi_errorp = &error;
if (nfsd->nd_repstat)
error = nfsd->nd_repstat;
else
error = EPROCUNAVAIL;
if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
return 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 for some
* operations, 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. A notable exception to this rule is when VOP_ACCESS()
* returns EPERM (e.g. when a file is immutable) which is always an
* error.
*/
int
nfsrv_access(struct vnode *vp, int flags, struct ucred *cred, int rdonly,
struct proc *p, int override)
{
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);
default:
break;
}
}
/*
* 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) && !uvm_vnp_uncache(vp))
return (ETXTBSY);
}
error = VOP_ACCESS(vp, flags, cred, p);
/*
* Allow certain operations for the owner (reads and writes
* on files that are already open).
*/
if (override && error == EACCES &&
VOP_GETATTR(vp, &vattr, cred, p) == 0 &&
cred->cr_uid == vattr.va_uid)
error = 0;
return error;
}
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