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freebsd/sys/nfs/nfs_serv.c
David Greenman 0d94caffca These changes embody the support of the fully coherent merged VM buffer cache, 
much higher filesystem I/O performance, and much better paging performance. It
represents the culmination of over 6 months of R&D.

The majority of the merged VM/cache work is by John Dyson.

The following highlights the most significant changes. Additionally, there are
(mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to
support the new VM/buffer scheme.

vfs_bio.c:
Significant rewrite of most of vfs_bio to support the merged VM buffer cache
scheme.  The scheme is almost fully compatible with the old filesystem
interface.  Significant improvement in the number of opportunities for write
clustering.

vfs_cluster.c, vfs_subr.c
Upgrade and performance enhancements in vfs layer code to support merged
VM/buffer cache.  Fixup of vfs_cluster to eliminate the bogus pagemove stuff.

vm_object.c:
Yet more improvements in the collapse code.  Elimination of some windows that
can cause list corruption.

vm_pageout.c:
Fixed it, it really works better now.  Somehow in 2.0, some "enhancements"
broke the code.  This code has been reworked from the ground-up.

vm_fault.c, vm_page.c, pmap.c, vm_object.c
Support for small-block filesystems with merged VM/buffer cache scheme.

pmap.c vm_map.c
Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of
kernel PTs.

vm_glue.c
Much simpler and more effective swapping code.  No more gratuitous swapping.

proc.h
Fixed the problem that the p_lock flag was not being cleared on a fork.

swap_pager.c, vnode_pager.c
Removal of old vfs_bio cruft to support the past pseudo-coherency.  Now the
code doesn't need it anymore.

machdep.c
Changes to better support the parameter values for the merged VM/buffer cache
scheme.

machdep.c, kern_exec.c, vm_glue.c
Implemented a seperate submap for temporary exec string space and another one
to contain process upages. This eliminates all map fragmentation problems
that previously existed.

ffs_inode.c, ufs_inode.c, ufs_readwrite.c
Changes for merged VM/buffer cache.  Add "bypass" support for sneaking in on
busy buffers.

Submitted by:	John Dyson and David Greenman
1995-01-09 16:06:02 +00:00

1995 lines
48 KiB
C
Raw Blame History

/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs_serv.c 8.3 (Berkeley) 1/12/94
* $Id: nfs_serv.c,v 1.7 1994/10/02 17:26:58 phk Exp $
*/
/*
* 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);
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
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);
nfsrv_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);
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
nfsrv_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));
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
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 {
error = nfsrv_access(vp, VWRITE, cred, rdonly,
nfsd->nd_procp);
if (error)
goto out;
}
}
error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
out:
nfsrv_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, cache2, len;
u_long duration2;
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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
nfsm_reply(0);
nqsrv_getl(nd.ni_startdir, NQL_READ);
nfsrv_vrele(nd.ni_startdir);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
vp = nd.ni_vp;
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (error) {
nfsrv_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);
nfsrv_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;
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error) {
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:
nfsrv_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);
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
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);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
if (error) {
nfsrv_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);
nfsrv_vput(vp);
nfsm_reply(0);
}
} else
uiop->uio_resid = 0;
nfsrv_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);
}
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
nfsm_reply(0);
if (vp->v_type != VREG) {
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
nfsrv_vput(vp);
nfsm_reply(0);
}
nqsrv_getl(vp, NQL_WRITE);
error = nfsrv_access(vp, VWRITE, cred, rdonly, nfsd->nd_procp);
if (error) {
nfsrv_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;
nfsrv_vput(vp);
nfsm_reply(0);
}
uiop->uio_resid = siz;
error = VOP_WRITE(vp, uiop, ioflags, cred);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
off = uiop->uio_offset;
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
nfsrv_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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
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) {
nfsrv_vrele(nd.ni_startdir);
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
error=VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error)
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) {
} else {
error = suser(cred, (u_short *)0);
if (error) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
nfsrv_vput(nd.ni_dvp);
goto out;
} else
vap->va_rdev = (dev_t)rdev;
}
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
error=VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error) {
nfsrv_vrele(nd.ni_startdir);
nfsm_reply(0);
}
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART);
nd.ni_cnd.cn_proc = nfsd->nd_procp;
nd.ni_cnd.cn_cred = nfsd->nd_procp->p_ucred;
error = lookup(&nd);
if (error) {
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) {
nfsrv_vrele(nd.ni_dvp);
nfsrv_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);
nfsrv_vput(nd.ni_dvp);
error = ENXIO;
goto out;
}
vp = nd.ni_vp;
} else {
nfsrv_vrele(nd.ni_startdir);
free(nd.ni_cnd.cn_pnbuf, M_NAMEI);
vp = nd.ni_vp;
if (nd.ni_dvp == vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (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) {
error = nfsrv_access(vp, VWRITE, cred,
(nd.ni_cnd.cn_flags & RDONLY), nfsd->nd_procp);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
nqsrv_getl(vp, NQL_WRITE);
error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
}
}
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
nfsrv_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)
nfsrv_vrele(nd.ni_startdir);
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vput(nd.ni_vp);
return (error);
out:
nfsrv_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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
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;
}
(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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_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;
error = nfs_namei(&fromnd, ffhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if(error)
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;
error = nfs_namei(&tond, tfhp, len2, nfsd->nd_slp, nam, &md,
&dpos, nfsd->nd_procp);
if (error) {
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
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)
nfsrv_vrele(tdvp);
else
nfsrv_vput(tdvp);
if (tvp)
nfsrv_vput(tvp);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
}
nfsrv_vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
out1:
nfsrv_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) {
nfsrv_vrele(tond.ni_startdir);
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
}
if (fromnd.ni_cnd.cn_nameiop || fromnd.ni_cnd.cn_flags) {
nfsrv_vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
nfsrv_vrele(fromnd.ni_dvp);
nfsrv_vrele(fvp);
}
return (error);
}
/*
* nfs link service
*/
int
nfsrv_link(nfsd, 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);
error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
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;
error = nfs_namei(&nd, dfhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
goto out1;
xp = nd.ni_vp;
if (xp != NULL) {
error = EEXIST;
goto out;
}
xp = nd.ni_dvp;
if (vp->v_mount != xp->v_mount)
error = EXDEV;
out:
if (!error) {
nqsrv_getl(vp, 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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
}
out1:
nfsrv_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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
if (pathcp)
FREE(pathcp, M_TEMP);
return (error);
}
/*
* nfs mkdir service
*/
int
nfsrv_mkdir(nfsd, 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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_vrele(vp);
error = EEXIST;
nfsm_reply(0);
}
nqsrv_getl(nd.ni_dvp, NQL_WRITE);
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error)
nfsm_reply(0);
vp = nd.ni_vp;
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (error) {
nfsrv_vput(vp);
nfsm_reply(0);
}
error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp);
nfsrv_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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
if (nd.ni_vp)
nfsrv_vrele(nd.ni_vp);
return (error);
}
/*
* nfs rmdir service
*/
int
nfsrv_rmdir(nfsd, 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;
error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos,
nfsd->nd_procp);
if (error)
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)
nfsrv_vrele(nd.ni_dvp);
else
nfsrv_vput(nd.ni_dvp);
nfsrv_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 off, toff;
int ncookies;
u_int *cookies;
u_int *cookiep;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED);
off = toff = fxdr_unsigned(u_long, *tl++);
cnt = fxdr_unsigned(int, *tl);
siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1));
if (cnt > NFS_MAXREADDIR)
siz = NFS_MAXREADDIR;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp);
if (error) {
nfsrv_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;
cookies = NULL;
eofflag = 0;
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
off = (off_t)io.uio_offset;
if (error) {
nfsrv_vrele(vp);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(0);
}
if (cookies == NULL) {
/*
* If the filesystem doen't support cookies, return eof.
*/
nfsrv_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);
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
nfsrv_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);
FREE(cookies, M_TEMP);
return (0);
}
}
/*
* Check for degenerate cases of nothing useful read.
* If so go try again
*/
cpos = rbuf;
cend = rbuf + siz;
dp = (struct dirent *)cpos;
cookiep = cookies;
while (cpos < cend && ncookies > 0
&& (*cookiep <= toff || dp->d_fileno == 0)) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend) {
toff = off;
siz = fullsiz;
FREE(cookies, M_TEMP);
goto again;
}
len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(siz);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
len += (4*NFSX_UNSIGNED + nlen + rem);
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a long boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
nfsm_clget;
/* Finish off the record */
*tl = txdr_unsigned(*cookiep);
bp += NFSX_UNSIGNED;
}
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
}
nfsrv_vrele(vp);
nfsm_clget;
*tl = nfs_false;
bp += NFSX_UNSIGNED;
nfsm_clget;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
bp += NFSX_UNSIGNED;
if (mp != mb) {
if (bp < be)
mp->m_len = bp - mtod(mp, caddr_t);
} else
mp->m_len += bp - bpos;
FREE(rbuf, M_TEMP);
FREE(cookies, 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, cache2;
int siz, cnt, fullsiz, eofflag, rdonly, cache;
u_long duration2;
u_quad_t frev, frev2;
u_long off, toff;
int ncookies;
u_int *cookies;
u_int *cookiep;
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED);
toff = off = fxdr_unsigned(u_long, *tl++);
cnt = fxdr_unsigned(int, *tl++);
duration2 = fxdr_unsigned(int, *tl);
siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1));
if (cnt > NFS_MAXREADDIR)
siz = NFS_MAXREADDIR;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
nfsm_reply(0);
nqsrv_getl(vp, NQL_READ);
error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp);
if (error) {
nfsrv_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;
cookies = NULL;
eofflag = 0;
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
off = (u_long)io.uio_offset;
if (error) {
nfsrv_vrele(vp);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(0);
}
if (cookies == NULL) {
/*
* If the filesystem doen't support cookies, return eof.
*/
nfsrv_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);
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
nfsrv_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);
FREE(cookies, M_TEMP);
return (0);
}
}
/*
* Check for degenerate cases of nothing useful read.
* If so go try again
*/
cpos = rbuf;
cend = rbuf + siz;
dp = (struct dirent *)cpos;
cookiep = cookies;
while (cpos < cend && ncookies > 0
&& (*cookiep <= toff || dp->d_fileno == 0)) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend) {
toff = off;
siz = fullsiz;
FREE(cookies, M_TEMP);
goto again;
}
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(siz);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend) {
if (dp->d_fileno != 0) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
/*
* For readdir_and_lookup get the vnode using
* the file number.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp))
goto invalid;
bzero((caddr_t)&fl.fl_nfh, sizeof (nfsv2fh_t));
fl.fl_nfh.fh_generic.fh_fsid =
nvp->v_mount->mnt_stat.f_fsid;
if (VFS_VPTOFH(nvp, &fl.fl_nfh.fh_generic.fh_fid)) {
nfsrv_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)) {
nfsrv_vput(nvp);
goto invalid;
}
nfsrv_vput(nvp);
fp = (struct nfsv2_fattr *)&fl.fl_fattr;
nfsm_srvfillattr;
len += (4*NFSX_UNSIGNED + nlen + rem + NFSX_FH
+ NFSX_NQFATTR);
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
/*
* For readdir_and_lookup copy the stuff out.
*/
xfer = sizeof (struct flrep);
cp = (caddr_t)&fl;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a long boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
nfsm_clget;
/* Finish off the record */
*tl = txdr_unsigned(*cookiep);
bp += NFSX_UNSIGNED;
}
invalid:
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
}
nfsrv_vrele(vp);
nfsm_clget;
*tl = nfs_false;
bp += NFSX_UNSIGNED;
nfsm_clget;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
bp += NFSX_UNSIGNED;
if (mp != mb) {
if (bp < be)
mp->m_len = bp - mtod(mp, caddr_t);
} else
mp->m_len += bp - bpos;
FREE(rbuf, M_TEMP);
FREE(cookies, 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);
error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly);
if (error)
nfsm_reply(0);
sf = &statfs;
error = VFS_STATFS(vp->v_mount, sf, nfsd->nd_procp);
nfsrv_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);
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) && !vnode_pager_uncache(vp))
return (ETXTBSY);
}
error = VOP_GETATTR(vp, &vattr, cred, p);
if (error)
return (error);
if ((error = VOP_ACCESS(vp, flags, cred, p)) &&
cred->cr_uid != vattr.va_uid)
return (error);
return (0);
}
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