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freebsd-skq/sys/nfs/nfs_serv.c
Kirk McKusick f2a2857bb3 Add snapshots to the fast filesystem. Most of the changes support 
the gating of system calls that cause modifications to the underlying
filesystem. The gating can be enabled by any filesystem that needs
to consistently suspend operations by adding the vop_stdgetwritemount
to their set of vnops. Once gating is enabled, the function
vfs_write_suspend stops all new write operations to a filesystem,
allows any filesystem modifying system calls already in progress
to complete, then sync's the filesystem to disk and returns. The
function vfs_write_resume allows the suspended write operations to
begin again. Gating is not added by default for all filesystems as
for SMP systems it adds two extra locks to such critical kernel
paths as the write system call. Thus, gating should only be added
as needed.

Details on the use and current status of snapshots in FFS can be
found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness
is not included here. Unless and until you create a snapshot file,
these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00

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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95
* $FreeBSD$
*/
/*
* nfs version 2 and 3 server calls to vnode ops
* - these routines generally have 3 phases
* 1 - break down and validate rpc request in mbuf list
* 2 - do the vnode ops for the request
* (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c)
* 3 - build the rpc reply in an mbuf list
* nb:
* - do not mix the phases, since the nfsm_?? macros can return failures
* on a bad rpc or similar and do not do any vrele() or vput()'s
*
* - the nfsm_reply() macro generates an nfs rpc reply with the nfs
* error number iff error != 0 whereas
* returning an error from the server function implies a fatal error
* such as a badly constructed rpc request that should be dropped without
* a reply.
* For Version 3, nfsm_reply() does not return for the error case, since
* most version 3 rpcs return more than the status for error cases.
*
* Other notes:
* Warning: always pay careful attention to resource cleanup on return
* and note that nfsm_*() macros can terminate a procedure on certain
* errors.
*
* lookup() and namei()
* may return garbage in various structural fields/return elements
* if an error is returned, and may garbage up nd.ni_dvp even if no
* error is returned and you did not request LOCKPARENT or WANTPARENT.
*
* We use the ni_cnd.cn_flags 'HASBUF' flag to track whether the name
* buffer has been freed or not.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/namei.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_object.h>
#include <nfs/nfsproto.h>
#include <nfs/rpcv2.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nqnfs.h>
#ifdef NFSRV_DEBUG
#define nfsdbprintf(info) printf info
#else
#define nfsdbprintf(info)
#endif
#define MAX_COMMIT_COUNT (1024 * 1024)
#define NUM_HEURISTIC 64
#define NHUSE_INIT 64
#define NHUSE_INC 16
#define NHUSE_MAX 2048
static struct nfsheur {
struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
off_t nh_nextr; /* next offset for sequential detection */
int nh_use; /* use count for selection */
int nh_seqcount; /* heuristic */
} nfsheur[NUM_HEURISTIC];
nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK,
NFFIFO, NFNON };
#ifndef NFS_NOSERVER
nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON,
NFCHR, NFNON };
/* Global vars */
extern u_int32_t nfs_xdrneg1;
extern u_int32_t nfs_false, nfs_true;
extern enum vtype nv3tov_type[8];
extern struct nfsstats nfsstats;
int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000;
int nfsrvw_procrastinate_v3 = 0;
static struct timeval nfsver = { 0 };
SYSCTL_DECL(_vfs_nfs);
static int nfs_async;
SYSCTL_INT(_vfs_nfs, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, "");
static int nfs_commit_blks;
static int nfs_commit_miss;
SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 0, "");
SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 0, "");
static int nfsrv_access __P((struct vnode *,int,struct ucred *,int,
struct proc *, int));
static void nfsrvw_coalesce __P((struct nfsrv_descript *,
struct nfsrv_descript *));
/*
* Clear nameidata fields that are tested in nsfmout cleanup code prior
* to using first nfsm macro (that might jump to the cleanup code).
*/
static __inline
void
ndclear(struct nameidata *nd)
{
nd->ni_cnd.cn_flags = 0;
nd->ni_vp = NULL;
nd->ni_dvp = NULL;
nd->ni_startdir = NULL;
}
/*
* nfs v3 access service
*/
int
nfsrv3_access(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret;
char *cp2;
struct mbuf *mb, *mreq, *mb2;
struct vattr vattr, *vap = &vattr;
u_long testmode, nfsmode;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly,
(nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
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, vap, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, vap);
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(nfsmode);
nfsmout:
if (vp)
vput(vp);
return(error);
}
/*
* nfs getattr service
*/
int
nfsrv_getattr(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct vattr va;
register struct vattr *vap = &va;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(0);
error = 0;
goto nfsmout;
}
nqsrv_getl(vp, ND_READ);
error = VOP_GETATTR(vp, vap, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
if (error) {
error = 0;
goto nfsmout;
}
nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
nfsm_srvfillattr(vap, fp);
/* fall through */
nfsmout:
if (vp)
vput(vp);
return(error);
}
/*
* nfs setattr service
*/
int
nfsrv_setattr(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, preat;
register struct vattr *vap = &va;
register struct nfsv2_sattr *sp;
register struct nfs_fattr *fp;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev;
struct timespec guard;
struct mount *mp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
VATTR_NULL(vap);
if (v3) {
nfsm_srvsattr(vap);
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
gcheck = fxdr_unsigned(int, *tl);
if (gcheck) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
fxdr_nfsv3time(tl, &guard);
}
} else {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
/*
* Nah nah nah nah na nah
* There is a bug in the Sun client that puts 0xffff in the mode
* field of sattr when it should put in 0xffffffff. The u_short
* doesn't sign extend.
* --> check the low order 2 bytes for 0xffff
*/
if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
vap->va_mode = nfstov_mode(sp->sa_mode);
if (sp->sa_uid != nfs_xdrneg1)
vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
if (sp->sa_gid != nfs_xdrneg1)
vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
if (sp->sa_size != nfs_xdrneg1)
vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size);
if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) {
#ifdef notyet
fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime);
#else
vap->va_atime.tv_sec =
fxdr_unsigned(int32_t, sp->sa_atime.nfsv2_sec);
vap->va_atime.tv_nsec = 0;
#endif
}
if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1)
fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime);
}
/*
* Now that we have all the fields, lets do it.
*/
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly,
(nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
error = 0;
goto nfsmout;
}
/*
* vp now an active resource, pay careful attention to cleanup
*/
nqsrv_getl(vp, ND_WRITE);
if (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);
vp = NULL;
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
error = 0;
goto nfsmout;
}
}
/*
* If the size is being changed write acces is required, otherwise
* just check for a read only file system.
*/
if (vap->va_size == ((u_quad_t)((quad_t) -1))) {
if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
error = EROFS;
goto out;
}
} else {
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
} else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly,
procp, 0)) != 0)
goto out;
}
error = VOP_SETATTR(vp, vap, cred, procp);
postat_ret = VOP_GETATTR(vp, vap, cred, procp);
if (!error)
error = postat_ret;
out:
vput(vp);
vp = NULL;
nfsm_reply(NFSX_WCCORFATTR(v3));
if (v3) {
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
error = 0;
goto nfsmout;
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
/* fall through */
nfsmout:
if (vp)
vput(vp);
vn_finished_write(mp);
return(error);
}
/*
* nfs lookup rpc
*/
int
nfsrv_lookup(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct nameidata nd, ind, *ndp = &nd;
struct vnode *vp, *dirp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, dirattr_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vattr va, dirattr, *vap = &va;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_srvnamesiz(len);
pubflag = nfs_ispublicfh(fhp);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag);
/*
* namei failure, only dirp to cleanup. Clear out garbarge from
* structure in case macros jump to nfsmout.
*/
if (error) {
if (dirp) {
if (v3)
dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred,
procp);
vrele(dirp);
dirp = NULL;
}
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
error = 0;
goto nfsmout;
}
/*
* Locate index file for public filehandle
*
* error is 0 on entry and 0 on exit from this block.
*/
if (pubflag) {
if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) {
/*
* Setup call to lookup() to see if we can find
* the index file. Arguably, this doesn't belong
* in a kernel.. Ugh. If an error occurs, do not
* try to install an index file and then clear the
* error.
*
* When we replace nd with ind and redirect ndp,
* maintenance of ni_startdir and ni_vp shift to
* ind and we have to clean them up in the old nd.
* However, the cnd resource continues to be maintained
* via the original nd. Confused? You aren't alone!
*/
ind = nd;
VOP_UNLOCK(nd.ni_vp, 0, procp);
ind.ni_pathlen = strlen(nfs_pub.np_index);
ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf =
nfs_pub.np_index;
ind.ni_startdir = nd.ni_vp;
VREF(ind.ni_startdir);
error = lookup(&ind);
ind.ni_dvp = NULL;
if (error == 0) {
/*
* Found an index file. Get rid of
* the old references. transfer nd.ni_vp'
*/
if (dirp)
vrele(dirp);
dirp = nd.ni_vp;
nd.ni_vp = NULL;
vrele(nd.ni_startdir);
nd.ni_startdir = NULL;
ndp = &ind;
}
error = 0;
}
/*
* If the public filehandle was used, check that this lookup
* didn't result in a filehandle outside the publicly exported
* filesystem. We clear the poor vp here to avoid lockups due
* to NFS I/O.
*/
if (ndp->ni_vp->v_mount != nfs_pub.np_mount) {
vput(nd.ni_vp);
nd.ni_vp = NULL;
error = EPERM;
}
}
if (dirp) {
if (v3)
dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred,
procp);
vrele(dirp);
dirp = NULL;
}
/*
* Resources at this point:
* ndp->ni_vp may not be NULL
*
*/
if (error) {
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
error = 0;
goto nfsmout;
}
nqsrv_getl(ndp->ni_startdir, ND_READ);
/*
* Clear out some resources prior to potentially blocking. This
* is not as critical as ni_dvp resources in other routines, but
* it helps.
*/
vrele(ndp->ni_startdir);
ndp->ni_startdir = NULL;
NDFREE(&nd, NDF_ONLY_PNBUF);
/*
* Get underlying attribute, then release remaining resources ( for
* the same potential blocking reason ) and reply.
*/
vp = ndp->ni_vp;
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
vput(vp);
ndp->ni_vp = NULL;
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3));
if (error) {
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
error = 0;
goto nfsmout;
}
nfsm_srvfhtom(fhp, v3);
if (v3) {
nfsm_srvpostop_attr(0, vap);
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
nfsmout:
if (dirp)
vrele(dirp);
NDFREE(&nd, NDF_ONLY_PNBUF);
if (ndp->ni_startdir)
vrele(ndp->ni_startdir);
if (ndp->ni_vp)
vput(ndp->ni_vp);
return (error);
}
/*
* nfs readlink service
*/
int
nfsrv_readlink(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
register struct iovec *ivp = iv;
register struct mbuf *mp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, i, tlen, len, getret;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mp2, *mp3, *mreq;
struct vnode *vp = NULL;
struct vattr attr;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
mp2 = (struct mbuf *)0;
#endif
mp3 = NULL;
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, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
error = 0;
goto nfsmout;
}
if (vp->v_type != VLNK) {
if (v3)
error = EINVAL;
else
error = ENXIO;
goto out;
}
nqsrv_getl(vp, ND_READ);
error = VOP_READLINK(vp, uiop, cred);
out:
getret = VOP_GETATTR(vp, &attr, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED);
if (v3) {
nfsm_srvpostop_attr(getret, &attr);
if (error) {
error = 0;
goto nfsmout;
}
}
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_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(len);
mb->m_next = mp3;
mp3 = NULL;
nfsmout:
if (mp3)
m_freem(mp3);
if (vp)
vput(vp);
return(error);
}
/*
* nfs read service
*/
int
nfsrv_read(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct iovec *iv;
struct iovec *iv2;
register struct mbuf *m;
register struct nfs_fattr *fp;
register u_int32_t *tl;
register int32_t t1;
register int i;
caddr_t bpos;
int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret;
int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct mbuf *m2;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
struct vattr va, *vap = &va;
struct nfsheur *nh;
off_t off;
int ioflag = 0;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (v3) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
off = fxdr_hyper(tl);
} else {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
off = (off_t)fxdr_unsigned(u_int32_t, *tl);
}
nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd));
/*
* Reference vp. If an error occurs, vp will be invalid, but we
* have to NULL it just in case. The macros might goto nfsmout
* as well.
*/
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
vp = NULL;
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(1, (struct vattr *)0);
error = 0;
goto nfsmout;
}
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
if (!error) {
nqsrv_getl(vp, ND_READ);
if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1);
}
getret = VOP_GETATTR(vp, vap, cred, procp);
if (!error)
error = getret;
if (error) {
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, vap);
error = 0;
goto nfsmout;
}
/*
* Calculate byte count to read
*/
if (off >= vap->va_size)
cnt = 0;
else if ((off + reqlen) > vap->va_size)
cnt = vap->va_size - off;
else
cnt = reqlen;
/*
* Calculate seqcount for heuristic
*/
{
int hi;
int try = 4;
/*
* Locate best candidate
*/
hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) & (NUM_HEURISTIC - 1);
nh = &nfsheur[hi];
while (try--) {
if (nfsheur[hi].nh_vp == vp) {
nh = &nfsheur[hi];
break;
}
if (nfsheur[hi].nh_use > 0)
--nfsheur[hi].nh_use;
hi = (hi + 1) & (NUM_HEURISTIC - 1);
if (nfsheur[hi].nh_use < nh->nh_use)
nh = &nfsheur[hi];
}
if (nh->nh_vp != vp) {
nh->nh_vp = vp;
nh->nh_nextr = off;
nh->nh_use = NHUSE_INIT;
if (off == 0)
nh->nh_seqcount = 4;
else
nh->nh_seqcount = 1;
}
/*
* Calculate heuristic
*/
if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) {
if (++nh->nh_seqcount > 127)
nh->nh_seqcount = 127;
} else if (nh->nh_seqcount > 1) {
nh->nh_seqcount = 1;
} else {
nh->nh_seqcount = 0;
}
nh->nh_use += NHUSE_INC;
if (nh->nh_use > NHUSE_MAX)
nh->nh_use = NHUSE_MAX;
ioflag |= nh->nh_seqcount << 16;
}
nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt));
if (v3) {
nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
*tl++ = nfs_true;
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V3FATTR / sizeof (u_int32_t));
} else {
nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED);
fp = (struct nfs_fattr *)tl;
tl += (NFSX_V2FATTR / sizeof (u_int32_t));
}
len = left = nfsm_rndup(cnt);
if (cnt > 0) {
/*
* Generate the mbuf list with the uio_iov ref. to it.
*/
i = 0;
m = m2 = mb;
while (left > 0) {
siz = min(M_TRAILINGSPACE(m), left);
if (siz > 0) {
left -= siz;
i++;
}
if (left > 0) {
MGET(m, M_WAIT, MT_DATA);
MCLGET(m, M_WAIT);
m->m_len = 0;
m2->m_next = m;
m2 = m;
}
}
MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
M_TEMP, M_WAITOK);
uiop->uio_iov = iv2 = iv;
m = mb;
left = 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 | ioflag, cred);
off = uiop->uio_offset;
nh->nh_nextr = off;
FREE((caddr_t)iv2, M_TEMP);
if (error || (getret = VOP_GETATTR(vp, vap, cred, procp))) {
if (!error)
error = getret;
m_freem(mreq);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, vap);
error = 0;
goto nfsmout;
}
} else {
uiop->uio_resid = 0;
}
vput(vp);
vp = NULL;
nfsm_srvfillattr(vap, fp);
tlen = len - uiop->uio_resid;
cnt = cnt < tlen ? cnt : tlen;
tlen = nfsm_rndup(cnt);
if (len != tlen || tlen != cnt)
nfsm_adj(mb, len - tlen, tlen - cnt);
if (v3) {
*tl++ = txdr_unsigned(cnt);
if (len < reqlen)
*tl++ = nfs_true;
else
*tl++ = nfs_false;
}
*tl = txdr_unsigned(cnt);
nfsmout:
if (vp)
vput(vp);
return(error);
}
/*
* nfs write service
*/
int
nfsrv_write(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct iovec *ivp;
register int i, cnt;
register struct mbuf *mp;
register struct nfs_fattr *fp;
struct iovec *iv;
struct vattr va, forat;
register struct vattr *vap = &va;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, len, forat_ret = 1;
int ioflags, aftat_ret = 1, retlen, zeroing, adjust;
int stable = NFSV3WRITE_FILESYNC;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io, *uiop = &io;
off_t off;
u_quad_t frev;
struct mount *mntp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
if (mrep == NULL) {
*mrq = NULL;
error = 0;
goto nfsmout;
}
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mntp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mntp, V_WAIT);
vput(vp);
vp = NULL;
if (v3) {
nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
off = fxdr_hyper(tl);
tl += 3;
stable = fxdr_unsigned(int, *tl++);
} else {
nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
tl += 2;
if (nfs_async)
stable = NFSV3WRITE_UNSTABLE;
}
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 = mrep;
while (mp) {
if (mp == md) {
zeroing = 0;
adjust = dpos - mtod(mp, caddr_t);
mp->m_len -= adjust;
if (mp->m_len > 0 && adjust > 0)
NFSMADV(mp, adjust);
}
if (zeroing)
mp->m_len = 0;
else if (mp->m_len > 0) {
i += mp->m_len;
if (i > len) {
mp->m_len -= (i - len);
zeroing = 1;
}
if (mp->m_len > 0)
cnt++;
}
mp = mp->m_next;
}
}
if (len > NFS_MAXDATA || len < 0 || i < len) {
error = EIO;
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
error = 0;
goto nfsmout;
}
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
vp = NULL;
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
error = 0;
goto nfsmout;
}
if (v3)
forat_ret = VOP_GETATTR(vp, &forat, cred, procp);
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
if (!error) {
nqsrv_getl(vp, ND_WRITE);
error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1);
}
if (error) {
vput(vp);
vp = NULL;
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
error = 0;
goto nfsmout;
}
if (len > 0) {
MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
M_WAITOK);
uiop->uio_iov = iv = ivp;
uiop->uio_iovcnt = cnt;
mp = mrep;
while (mp) {
if (mp->m_len > 0) {
ivp->iov_base = mtod(mp, caddr_t);
ivp->iov_len = mp->m_len;
ivp++;
}
mp = mp->m_next;
}
/*
* XXX
* The IO_METASYNC flag indicates that all metadata (and not just
* enough to ensure data integrity) mus be written to stable storage
* synchronously.
* (IO_METASYNC is not yet implemented in 4.4BSD-Lite.)
*/
if (stable == NFSV3WRITE_UNSTABLE)
ioflags = IO_NODELOCKED;
else if (stable == NFSV3WRITE_DATASYNC)
ioflags = (IO_SYNC | IO_NODELOCKED);
else
ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
uiop->uio_resid = len;
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
uiop->uio_offset = off;
error = VOP_WRITE(vp, uiop, ioflags, cred);
nfsstats.srvvop_writes++;
FREE((caddr_t)iv, M_TEMP);
}
aftat_ret = VOP_GETATTR(vp, vap, cred, procp);
vput(vp);
vp = NULL;
if (!error)
error = aftat_ret;
nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) +
2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3));
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
if (error) {
error = 0;
goto nfsmout;
}
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(retlen);
/*
* If nfs_async is set, then pretend the write was FILESYNC.
*/
if (stable == NFSV3WRITE_UNSTABLE && !nfs_async)
*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.
*/
if (nfsver.tv_sec == 0)
nfsver = boottime;
*tl++ = txdr_unsigned(nfsver.tv_sec);
*tl = txdr_unsigned(nfsver.tv_usec);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
nfsmout:
if (vp)
vput(vp);
vn_finished_write(mntp);
return(error);
}
/*
* NFS write service with write gathering support. Called when
* nfsrvw_procrastinate > 0.
* See: Chet Juszczak, "Improving the Write Performance of an NFS Server",
* in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco,
* Jan. 1994.
*/
int
nfsrv_writegather(ndp, slp, procp, mrq)
struct nfsrv_descript **ndp;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
register struct iovec *ivp;
register struct mbuf *mp;
register struct nfsrv_descript *wp, *nfsd, *owp, *swp;
register struct nfs_fattr *fp;
register int i;
struct iovec *iov;
struct nfsrvw_delayhash *wpp;
struct ucred *cred;
struct vattr va, forat;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos, dpos;
int error = 0, rdonly, cache, len, forat_ret = 1;
int ioflags, aftat_ret = 1, s, adjust, v3, zeroing;
char *cp2;
struct mbuf *mb, *mb2, *mreq, *mrep, *md;
struct vnode *vp = NULL;
struct uio io, *uiop = &io;
u_quad_t frev, cur_usec;
struct mount *mntp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
i = 0;
len = 0;
#endif
*mrq = NULL;
if (*ndp) {
nfsd = *ndp;
*ndp = NULL;
mrep = nfsd->nd_mrep;
md = nfsd->nd_md;
dpos = nfsd->nd_dpos;
cred = &nfsd->nd_cr;
v3 = (nfsd->nd_flag & ND_NFSV3);
LIST_INIT(&nfsd->nd_coalesce);
nfsd->nd_mreq = NULL;
nfsd->nd_stable = NFSV3WRITE_FILESYNC;
cur_usec = nfs_curusec();
nfsd->nd_time = cur_usec +
(v3 ? nfsrvw_procrastinate_v3 : nfsrvw_procrastinate);
/*
* Now, get the write header..
*/
nfsm_srvmtofh(&nfsd->nd_fh);
if (v3) {
nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
nfsd->nd_off = fxdr_hyper(tl);
tl += 3;
nfsd->nd_stable = fxdr_unsigned(int, *tl++);
} else {
nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
tl += 2;
if (nfs_async)
nfsd->nd_stable = NFSV3WRITE_UNSTABLE;
}
len = fxdr_unsigned(int32_t, *tl);
nfsd->nd_len = len;
nfsd->nd_eoff = nfsd->nd_off + len;
/*
* Trim the header out of the mbuf list and trim off any trailing
* junk so that the mbuf list has only the write data.
*/
zeroing = 1;
i = 0;
mp = mrep;
while (mp) {
if (mp == md) {
zeroing = 0;
adjust = dpos - mtod(mp, caddr_t);
mp->m_len -= adjust;
if (mp->m_len > 0 && adjust > 0)
NFSMADV(mp, adjust);
}
if (zeroing)
mp->m_len = 0;
else {
i += mp->m_len;
if (i > len) {
mp->m_len -= (i - len);
zeroing = 1;
}
}
mp = mp->m_next;
}
if (len > NFS_MAXDATA || len < 0 || i < len) {
nfsmout:
m_freem(mrep);
error = EIO;
nfsm_writereply(2 * NFSX_UNSIGNED, v3);
if (v3)
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
nfsd->nd_mreq = mreq;
nfsd->nd_mrep = NULL;
nfsd->nd_time = 0;
}
/*
* Add this entry to the hash and time queues.
*/
s = splsoftclock();
owp = NULL;
wp = slp->ns_tq.lh_first;
while (wp && wp->nd_time < nfsd->nd_time) {
owp = wp;
wp = wp->nd_tq.le_next;
}
NFS_DPF(WG, ("Q%03x", nfsd->nd_retxid & 0xfff));
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_tq);
} else {
LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
}
if (nfsd->nd_mrep) {
wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data);
owp = NULL;
wp = wpp->lh_first;
while (wp &&
bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) {
owp = wp;
wp = wp->nd_hash.le_next;
}
while (wp && wp->nd_off < nfsd->nd_off &&
!bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) {
owp = wp;
wp = wp->nd_hash.le_next;
}
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_hash);
/*
* Search the hash list for overlapping entries and
* coalesce.
*/
for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) {
wp = nfsd->nd_hash.le_next;
if (NFSW_SAMECRED(owp, nfsd))
nfsrvw_coalesce(owp, nfsd);
}
} else {
LIST_INSERT_HEAD(wpp, nfsd, nd_hash);
}
}
splx(s);
}
/*
* Now, do VOP_WRITE()s for any one(s) that need to be done now
* and generate the associated reply mbuf list(s).
*/
loop1:
cur_usec = nfs_curusec();
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) {
owp = nfsd->nd_tq.le_next;
if (nfsd->nd_time > cur_usec)
break;
if (nfsd->nd_mreq)
continue;
NFS_DPF(WG, ("P%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
LIST_REMOVE(nfsd, nd_hash);
splx(s);
mrep = nfsd->nd_mrep;
nfsd->nd_mrep = NULL;
cred = &nfsd->nd_cr;
v3 = (nfsd->nd_flag & ND_NFSV3);
forat_ret = aftat_ret = 1;
error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp,
nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (!error) {
if (v3)
forat_ret = VOP_GETATTR(vp, &forat, cred, procp);
if (vp->v_type != VREG) {
if (v3)
error = EINVAL;
else
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
}
} else {
vp = NULL;
}
if (!error) {
nqsrv_getl(vp, ND_WRITE);
error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1);
}
if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE)
ioflags = IO_NODELOCKED;
else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC)
ioflags = (IO_SYNC | IO_NODELOCKED);
else
ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
uiop->uio_rw = UIO_WRITE;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = (struct proc *)0;
uiop->uio_offset = nfsd->nd_off;
uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off;
if (uiop->uio_resid > 0) {
mp = mrep;
i = 0;
while (mp) {
if (mp->m_len > 0)
i++;
mp = mp->m_next;
}
uiop->uio_iovcnt = i;
MALLOC(iov, struct iovec *, i * sizeof (struct iovec),
M_TEMP, M_WAITOK);
uiop->uio_iov = ivp = iov;
mp = mrep;
while (mp) {
if (mp->m_len > 0) {
ivp->iov_base = mtod(mp, caddr_t);
ivp->iov_len = mp->m_len;
ivp++;
}
mp = mp->m_next;
}
if (!error) {
if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) {
VOP_UNLOCK(vp, 0, procp);
error = vn_start_write(NULL, &mntp, V_WAIT);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, procp);
}
}
if (!error) {
error = VOP_WRITE(vp, uiop, ioflags, cred);
nfsstats.srvvop_writes++;
vn_finished_write(mntp);
}
FREE((caddr_t)iov, M_TEMP);
}
m_freem(mrep);
if (vp) {
aftat_ret = VOP_GETATTR(vp, &va, cred, procp);
vput(vp);
vp = NULL;
}
/*
* Loop around generating replies for all write rpcs that have
* now been completed.
*/
swp = nfsd;
do {
NFS_DPF(WG, ("R%03x", nfsd->nd_retxid & 0xfff));
if (error) {
nfsm_writereply(NFSX_WCCDATA(v3), v3);
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
}
} else {
nfsm_writereply(NFSX_PREOPATTR(v3) +
NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED +
NFSX_WRITEVERF(v3), v3);
if (v3) {
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
*tl++ = txdr_unsigned(nfsd->nd_len);
*tl++ = txdr_unsigned(swp->nd_stable);
/*
* Actually, there is no need to txdr these fields,
* but it may make the values more human readable,
* for debugging purposes.
*/
if (nfsver.tv_sec == 0)
nfsver = boottime;
*tl++ = txdr_unsigned(nfsver.tv_sec);
*tl = txdr_unsigned(nfsver.tv_usec);
} else {
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(&va, fp);
}
}
nfsd->nd_mreq = mreq;
if (nfsd->nd_mrep)
panic("nfsrv_write: nd_mrep not free");
/*
* Done. Put it at the head of the timer queue so that
* the final phase can return the reply.
*/
s = splsoftclock();
if (nfsd != swp) {
nfsd->nd_time = 0;
LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
}
nfsd = swp->nd_coalesce.lh_first;
if (nfsd) {
LIST_REMOVE(nfsd, nd_tq);
}
splx(s);
} while (nfsd);
s = splsoftclock();
swp->nd_time = 0;
LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq);
splx(s);
goto loop1;
}
splx(s);
/*
* Search for a reply to return.
*/
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next)
if (nfsd->nd_mreq) {
NFS_DPF(WG, ("X%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
*mrq = nfsd->nd_mreq;
*ndp = nfsd;
break;
}
splx(s);
return (0);
}
/*
* Coalesce the write request nfsd into owp. To do this we must:
* - remove nfsd from the queues
* - merge nfsd->nd_mrep into owp->nd_mrep
* - update the nd_eoff and nd_stable for owp
* - put nfsd on owp's nd_coalesce list
* NB: Must be called at splsoftclock().
*/
static void
nfsrvw_coalesce(owp, nfsd)
register struct nfsrv_descript *owp;
register struct nfsrv_descript *nfsd;
{
register int overlap;
register struct mbuf *mp;
struct nfsrv_descript *p;
NFS_DPF(WG, ("C%03x-%03x",
nfsd->nd_retxid & 0xfff, owp->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_hash);
LIST_REMOVE(nfsd, nd_tq);
if (owp->nd_eoff < nfsd->nd_eoff) {
overlap = owp->nd_eoff - nfsd->nd_off;
if (overlap < 0)
panic("nfsrv_coalesce: bad off");
if (overlap > 0)
m_adj(nfsd->nd_mrep, overlap);
mp = owp->nd_mrep;
while (mp->m_next)
mp = mp->m_next;
mp->m_next = nfsd->nd_mrep;
owp->nd_eoff = nfsd->nd_eoff;
} else
m_freem(nfsd->nd_mrep);
nfsd->nd_mrep = NULL;
if (nfsd->nd_stable == NFSV3WRITE_FILESYNC)
owp->nd_stable = NFSV3WRITE_FILESYNC;
else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC &&
owp->nd_stable == NFSV3WRITE_UNSTABLE)
owp->nd_stable = NFSV3WRITE_DATASYNC;
LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq);
/*
* If nfsd had anything else coalesced into it, transfer them
* to owp, otherwise their replies will never get sent.
*/
for (p = nfsd->nd_coalesce.lh_first; p;
p = nfsd->nd_coalesce.lh_first) {
LIST_REMOVE(p, nd_tq);
LIST_INSERT_HEAD(&owp->nd_coalesce, p, nd_tq);
}
}
/*
* nfs create service
* now does a truncate to 0 length via. setattr if it already exists
*/
int
nfsrv_create(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct nfs_fattr *fp;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &va;
register struct nfsv2_sattr *sp;
register u_int32_t *tl;
struct nameidata nd;
register int32_t t1;
caddr_t bpos;
int error = 0, rdev, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0;
caddr_t cp;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev, tempsize;
u_char cverf[NFSX_V3CREATEVERF];
struct mount *mp = NULL;
struct vnode *vp;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
rdev = 0;
#endif
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART;
/*
* Call namei and do initial cleanup to get a few things
* out of the way. If we get an initial error we cleanup
* and return here to avoid special-casing the invalid nd
* structure through the rest of the case. dirp may be
* set even if an error occurs, but the nd structure will not
* be valid at all if an error occurs so we have to invalidate it
* prior to calling nfsm_reply ( which might goto nfsmout ).
*/
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (v3) {
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
} else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
goto nfsmout;
}
/*
* No error. Continue. State:
*
* startdir is valid ( we release this immediately )
* dirp may be valid
* nd.ni_vp may be valid
* nd.ni_dvp is valid
*
* The error state is set through the code and we may also do some
* opportunistic releasing of vnodes to avoid holding locks through
* NFS I/O. The cleanup at the end is a catch-all
*/
VATTR_NULL(vap);
if (v3) {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
how = fxdr_unsigned(int, *tl);
switch (how) {
case NFSV3CREATE_GUARDED:
if (nd.ni_vp) {
error = EEXIST;
break;
}
/* fall through */
case NFSV3CREATE_UNCHECKED:
nfsm_srvsattr(vap);
break;
case NFSV3CREATE_EXCLUSIVE:
nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF);
bcopy(cp, cverf, NFSX_V3CREATEVERF);
exclusive_flag = 1;
if (nd.ni_vp == NULL)
vap->va_mode = 0;
break;
};
vap->va_type = VREG;
} else {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
vap->va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode));
if (vap->va_type == VNON)
vap->va_type = VREG;
vap->va_mode = nfstov_mode(sp->sa_mode);
switch (vap->va_type) {
case VREG:
tsize = fxdr_unsigned(int32_t, sp->sa_size);
if (tsize != -1)
vap->va_size = (u_quad_t)tsize;
break;
case VCHR:
case VBLK:
case VFIFO:
rdev = fxdr_unsigned(long, sp->sa_size);
break;
default:
break;
};
}
/*
* Iff doesn't exist, create it
* otherwise just truncate to 0 length
* should I set the mode too ?
*
* The only possible error we can have at this point is EEXIST.
* nd.ni_vp will also be non-NULL in that case.
*/
if (nd.ni_vp == NULL) {
if (vap->va_type == VREG || vap->va_type == VSOCK) {
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error)
NDFREE(&nd, NDF_ONLY_PNBUF);
else {
nfsrv_object_create(nd.ni_vp);
if (exclusive_flag) {
exclusive_flag = 0;
VATTR_NULL(vap);
bcopy(cverf, (caddr_t)&vap->va_atime,
NFSX_V3CREATEVERF);
error = VOP_SETATTR(nd.ni_vp, vap, cred,
procp);
}
}
} else if (
vap->va_type == VCHR ||
vap->va_type == VBLK ||
vap->va_type == VFIFO
) {
/*
* Handle SysV FIFO node special cases. All other
* devices require super user to access.
*/
if (vap->va_type == VCHR && rdev == 0xffffffff)
vap->va_type = VFIFO;
if (vap->va_type != VFIFO &&
(error = suser_xxx(cred, 0, 0))) {
goto nfsmreply0;
}
vap->va_rdev = rdev;
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error) {
NDFREE(&nd, NDF_ONLY_PNBUF);
goto nfsmreply0;
}
vput(nd.ni_vp);
nd.ni_vp = NULL;
/*
* release dvp prior to lookup
*/
vput(nd.ni_dvp);
nd.ni_dvp = NULL;
/*
* Setup for lookup.
*
* Even though LOCKPARENT was cleared, ni_dvp may
* be garbage.
*/
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT);
nd.ni_cnd.cn_proc = procp;
nd.ni_cnd.cn_cred = cred;
error = lookup(&nd);
nd.ni_dvp = NULL;
if (error != 0) {
nfsm_reply(0);
/* fall through on certain errors */
}
nfsrv_object_create(nd.ni_vp);
if (nd.ni_cnd.cn_flags & ISSYMLINK) {
error = EINVAL;
goto nfsmreply0;
}
} else {
error = ENXIO;
}
} else {
if (vap->va_size != -1) {
error = nfsrv_access(nd.ni_vp, VWRITE, cred,
(nd.ni_cnd.cn_flags & RDONLY), procp, 0);
if (!error) {
nqsrv_getl(nd.ni_vp, ND_WRITE);
tempsize = vap->va_size;
VATTR_NULL(vap);
vap->va_size = tempsize;
error = VOP_SETATTR(nd.ni_vp, vap, cred,
procp);
}
}
}
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(nd.ni_vp, vap, cred, procp);
}
if (v3) {
if (exclusive_flag && !error &&
bcmp(cverf, (caddr_t)&vap->va_atime, NFSX_V3CREATEVERF))
error = EEXIST;
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
dirp = NULL;
}
nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
} else {
nfsm_srvfhtom(fhp, v3);
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
goto nfsmout;
nfsmreply0:
nfsm_reply(0);
error = 0;
/* fall through */
nfsmout:
if (nd.ni_startdir) {
vrele(nd.ni_startdir);
nd.ni_startdir = NULL;
}
if (dirp)
vrele(dirp);
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp)
vput(nd.ni_vp);
vn_finished_write(mp);
return (error);
}
/*
* nfs v3 mknod service
*/
int
nfsrv_mknod(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &va;
register u_int32_t *tl;
struct nameidata nd;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
u_int32_t major, minor;
enum vtype vtyp;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
struct mount *mp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART;
/*
* Handle nfs_namei() call. If an error occurs, the nd structure
* is not valid. However, nfsm_*() routines may still jump to
* nfsmout.
*/
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp)
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp);
if (error) {
nfsm_reply(NFSX_WCCDATA(1));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
goto nfsmout;
}
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
vtyp = nfsv3tov_type(*tl);
if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
error = NFSERR_BADTYPE;
goto out;
}
VATTR_NULL(vap);
nfsm_srvsattr(vap);
if (vtyp == VCHR || vtyp == VBLK) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
major = fxdr_unsigned(u_int32_t, *tl++);
minor = fxdr_unsigned(u_int32_t, *tl);
vap->va_rdev = makeudev(major, minor);
}
/*
* Iff doesn't exist, create it.
*/
if (nd.ni_vp) {
error = EEXIST;
goto out;
}
vap->va_type = vtyp;
if (vtyp == VSOCK) {
vrele(nd.ni_startdir);
nd.ni_startdir = NULL;
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error)
NDFREE(&nd, NDF_ONLY_PNBUF);
} else {
if (vtyp != VFIFO && (error = suser_xxx(cred, 0, 0)))
goto out;
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
if (error) {
NDFREE(&nd, NDF_ONLY_PNBUF);
goto out;
}
vput(nd.ni_vp);
nd.ni_vp = NULL;
/*
* Release dvp prior to lookup
*/
vput(nd.ni_dvp);
nd.ni_dvp = NULL;
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT);
nd.ni_cnd.cn_proc = procp;
nd.ni_cnd.cn_cred = procp->p_ucred;
error = lookup(&nd);
nd.ni_dvp = NULL;
if (error)
goto out;
if (nd.ni_cnd.cn_flags & ISSYMLINK)
error = EINVAL;
}
/*
* send response, cleanup, return.
*/
out:
if (nd.ni_startdir) {
vrele(nd.ni_startdir);
nd.ni_startdir = NULL;
}
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
nd.ni_dvp = NULL;
}
vp = nd.ni_vp;
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(vp, vap, cred, procp);
vput(vp);
vp = NULL;
nd.ni_vp = NULL;
}
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
if (dirp) {
vrele(dirp);
dirp = NULL;
}
nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1));
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
vn_finished_write(mp);
return (0);
nfsmout:
if (dirp)
vrele(dirp);
if (nd.ni_startdir)
vrele(nd.ni_startdir);
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp)
vput(nd.ni_vp);
vn_finished_write(mp);
return (error);
}
/*
* nfs remove service
*/
int
nfsrv_remove(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *dirp;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
struct mount *mp = NULL;
struct vnode *vp;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (v3) {
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
} else {
vrele(dirp);
dirp = NULL;
}
}
if (error == 0) {
if (nd.ni_vp->v_type == VDIR) {
error = EPERM; /* POSIX */
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (nd.ni_vp->v_flag & VROOT) {
error = EBUSY;
goto out;
}
out:
if (!error) {
nqsrv_getl(nd.ni_dvp, ND_WRITE);
nqsrv_getl(nd.ni_vp, ND_WRITE);
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
NDFREE(&nd, NDF_ONLY_PNBUF);
}
}
if (dirp && v3) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
dirp = NULL;
}
nfsm_reply(NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
}
nfsmout:
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp)
vput(nd.ni_vp);
vn_finished_write(mp);
return(error);
}
/*
* nfs rename service
*/
int
nfsrv_rename(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1;
int tdirfor_ret = 1, tdiraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct nameidata fromnd, tond;
struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0;
struct vnode *tdirp = (struct vnode *)0;
struct vattr fdirfor, fdiraft, tdirfor, tdiraft;
nfsfh_t fnfh, tnfh;
fhandle_t *ffhp, *tfhp;
u_quad_t frev;
uid_t saved_uid;
struct mount *mp = NULL;
struct vnode *vp;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
fvp = (struct vnode *)0;
#endif
ffhp = &fnfh.fh_generic;
tfhp = &tnfh.fh_generic;
/*
* Clear fields incase goto nfsmout occurs from macro.
*/
ndclear(&fromnd);
ndclear(&tond);
nfsm_srvmtofh(ffhp);
if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &ffhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
/*
* Remember our original uid so that we can reset cr_uid before
* the second nfs_namei() call, in case it is remapped.
*/
saved_uid = cred->cr_uid;
fromnd.ni_cnd.cn_cred = cred;
fromnd.ni_cnd.cn_nameiop = DELETE;
fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART;
error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md,
&dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (fdirp) {
if (v3) {
fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred,
procp);
} else {
vrele(fdirp);
fdirp = NULL;
}
}
if (error) {
nfsm_reply(2 * NFSX_WCCDATA(v3));
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
error = 0;
goto nfsmout;
}
fvp = fromnd.ni_vp;
nfsm_srvmtofh(tfhp);
nfsm_strsiz(len2, NFS_MAXNAMLEN);
cred->cr_uid = saved_uid;
tond.ni_cnd.cn_cred = cred;
tond.ni_cnd.cn_nameiop = RENAME;
tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART;
error = nfs_namei(&tond, tfhp, len2, slp, nam, &md,
&dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (tdirp) {
if (v3) {
tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred,
procp);
} else {
vrele(tdirp);
tdirp = NULL;
}
}
if (error)
goto out1;
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
if (v3)
error = EEXIST;
else
error = EISDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
if (v3)
error = EEXIST;
else
error = ENOTDIR;
goto out;
}
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
}
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
if (fvp->v_mount != tdvp->v_mount) {
if (v3)
error = EXDEV;
else
error = ENOTEMPTY;
goto out;
}
if (fvp == tdvp) {
if (v3)
error = EINVAL;
else
error = ENOTEMPTY;
}
/*
* If source is the same as the destination (that is the
* same vnode with the same name in the same directory),
* then there is nothing to do.
*/
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
fromnd.ni_cnd.cn_namelen))
error = -1;
out:
if (!error) {
/*
* The VOP_RENAME function releases all vnode references &
* locks prior to returning so we need to clear the pointers
* to bypass cleanup code later on.
*/
nqsrv_getl(fromnd.ni_dvp, ND_WRITE);
nqsrv_getl(tdvp, ND_WRITE);
if (tvp) {
nqsrv_getl(tvp, ND_WRITE);
}
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
fromnd.ni_dvp = NULL;
fromnd.ni_vp = NULL;
tond.ni_dvp = NULL;
tond.ni_vp = NULL;
if (error) {
fromnd.ni_cnd.cn_flags &= ~HASBUF;
tond.ni_cnd.cn_flags &= ~HASBUF;
}
} else {
if (error == -1)
error = 0;
}
/* fall through */
out1:
if (fdirp)
fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp);
if (tdirp)
tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp);
nfsm_reply(2 * NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
}
error = 0;
/* fall through */
nfsmout:
/*
* Clear out tond related fields
*/
if (tdirp)
vrele(tdirp);
if (tond.ni_startdir)
vrele(tond.ni_startdir);
NDFREE(&tond, NDF_ONLY_PNBUF);
if (tond.ni_dvp) {
if (tond.ni_dvp == tond.ni_vp)
vrele(tond.ni_dvp);
else
vput(tond.ni_dvp);
}
if (tond.ni_vp)
vput(tond.ni_vp);
/*
* Clear out fromnd related fields
*/
if (fdirp)
vrele(fdirp);
if (fromnd.ni_startdir)
vrele(fromnd.ni_startdir);
NDFREE(&fromnd, NDF_ONLY_PNBUF);
if (fromnd.ni_dvp)
vrele(fromnd.ni_dvp);
if (fromnd.ni_vp)
vrele(fromnd.ni_vp);
vn_finished_write(mp);
return (error);
}
/*
* nfs link service
*/
int
nfsrv_link(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct nameidata nd;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1;
int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp = NULL, *xp, *dirp = (struct vnode *)0;
struct vattr dirfor, diraft, at;
nfsfh_t nfh, dnfh;
fhandle_t *fhp, *dfhp;
u_quad_t frev;
struct mount *mp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
dfhp = &dnfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvmtofh(dfhp);
nfsm_srvnamesiz(len);
error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
nfsm_srvpostop_attr(getret, &at);
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
vp = NULL;
error = 0;
goto nfsmout;
}
if (vp->v_type == VDIR) {
error = EPERM; /* POSIX */
goto out1;
}
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (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) {
nqsrv_getl(vp, ND_WRITE);
nqsrv_getl(xp, ND_WRITE);
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
NDFREE(&nd, NDF_ONLY_PNBUF);
}
/* fall through */
out1:
if (v3)
getret = VOP_GETATTR(vp, &at, cred, procp);
if (dirp)
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
}
/* fall through */
nfsmout:
NDFREE(&nd, NDF_ONLY_PNBUF);
if (dirp)
vrele(dirp);
if (vp)
vrele(vp);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp)
vrele(nd.ni_vp);
vn_finished_write(mp);
return(error);
}
/*
* nfs symbolic link service
*/
int
nfsrv_symlink(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
struct nameidata nd;
register struct vattr *vap = &va;
register u_int32_t *tl;
register int32_t t1;
struct nfsv2_sattr *sp;
char *bpos, *pathcp = (char *)0, *cp2;
struct uio io;
struct iovec iv;
int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
struct mbuf *mb, *mreq, *mb2;
struct vnode *dirp = (struct vnode *)0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
struct mount *mp = NULL;
struct vnode *vp;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (v3) {
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
} else {
vrele(dirp);
dirp = NULL;
}
}
if (error)
goto out;
VATTR_NULL(vap);
if (v3)
nfsm_srvsattr(vap);
nfsm_strsiz(len2, NFS_MAXPATHLEN);
MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK);
iv.iov_base = pathcp;
iv.iov_len = len2;
io.uio_resid = len2;
io.uio_offset = 0;
io.uio_iov = &iv;
io.uio_iovcnt = 1;
io.uio_segflg = UIO_SYSSPACE;
io.uio_rw = UIO_READ;
io.uio_procp = (struct proc *)0;
nfsm_mtouio(&io, len2);
if (!v3) {
nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
vap->va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
}
*(pathcp + len2) = '\0';
if (nd.ni_vp) {
error = EEXIST;
goto out;
}
/*
* issue symlink op. SAVESTART is set so the underlying path component
* is only freed by the VOP if an error occurs.
*/
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp);
if (error)
NDFREE(&nd, NDF_ONLY_PNBUF);
else {
vput(nd.ni_vp);
nd.ni_vp = NULL;
}
/*
* releases directory prior to potential lookup op.
*/
vput(nd.ni_dvp);
nd.ni_dvp = NULL;
if (error == 0) {
if (v3) {
/*
* Issue lookup. Leave SAVESTART set so we can easily free
* the name buffer later on.
*
* since LOCKPARENT is not set, ni_dvp will be garbage on
* return whether an error occurs or not.
*/
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | FOLLOW);
nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF);
nd.ni_cnd.cn_proc = procp;
nd.ni_cnd.cn_cred = cred;
error = lookup(&nd);
nd.ni_dvp = NULL;
if (error == 0) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(nd.ni_vp, vap, cred,
procp);
vput(nd.ni_vp);
nd.ni_vp = NULL;
}
}
}
out:
/*
* These releases aren't strictly required, does even doing them
* make any sense? XXX can nfsm_reply() block?
*/
if (pathcp) {
FREE(pathcp, M_TEMP);
pathcp = NULL;
}
if (dirp) {
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
vrele(dirp);
dirp = NULL;
}
if (nd.ni_startdir) {
vrele(nd.ni_startdir);
nd.ni_startdir = NULL;
}
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
}
error = 0;
/* fall through */
nfsmout:
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp) {
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 (nd.ni_startdir)
vrele(nd.ni_startdir);
if (dirp)
vrele(dirp);
if (pathcp)
FREE(pathcp, M_TEMP);
vn_finished_write(mp);
return (error);
}
/*
* nfs mkdir service
*/
int
nfsrv_mkdir(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr va, dirfor, diraft;
register struct vattr *vap = &va;
register struct nfs_fattr *fp;
struct nameidata nd;
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *dirp = NULL;
int vpexcl = 0;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
struct mount *mp = NULL;
struct vnode *vp;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (v3) {
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
} else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
goto nfsmout;
}
VATTR_NULL(vap);
if (v3) {
nfsm_srvsattr(vap);
} else {
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
vap->va_mode = nfstov_mode(*tl++);
}
/*
* At this point nd.ni_dvp is referenced and exclusively locked and
* nd.ni_vp, if it exists, is referenced but not locked.
*/
vap->va_type = VDIR;
if (nd.ni_vp != NULL) {
NDFREE(&nd, NDF_ONLY_PNBUF);
error = EEXIST;
goto out;
}
/*
* Issue mkdir op. Since SAVESTART is not set, the pathname
* component is freed by the VOP call. This will fill-in
* nd.ni_vp, reference, and exclusively lock it.
*/
nqsrv_getl(nd.ni_dvp, ND_WRITE);
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
NDFREE(&nd, NDF_ONLY_PNBUF);
vpexcl = 1;
vput(nd.ni_dvp);
nd.ni_dvp = NULL;
if (!error) {
bzero((caddr_t)fhp, sizeof(nfh));
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid);
if (!error)
error = VOP_GETATTR(nd.ni_vp, vap, cred, procp);
}
out:
if (dirp)
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
if (v3) {
if (!error) {
nfsm_srvpostop_fh(fhp);
nfsm_srvpostop_attr(0, vap);
}
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
} else {
nfsm_srvfhtom(fhp, v3);
nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
nfsm_srvfillattr(vap, fp);
}
error = 0;
/* fall through */
nfsmout:
if (dirp)
vrele(dirp);
if (nd.ni_dvp) {
NDFREE(&nd, NDF_ONLY_PNBUF);
if (nd.ni_dvp == nd.ni_vp && vpexcl)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp) {
if (vpexcl)
vput(nd.ni_vp);
else
vrele(nd.ni_vp);
}
vn_finished_write(mp);
return (error);
}
/*
* nfs rmdir service
*/
int
nfsrv_rmdir(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mreq;
struct vnode *vp, *dirp = (struct vnode *)0;
struct vattr dirfor, diraft;
nfsfh_t nfh;
fhandle_t *fhp;
struct nameidata nd;
u_quad_t frev;
struct mount *mp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
ndclear(&nd);
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_srvnamesiz(len);
nd.ni_cnd.cn_cred = cred;
nd.ni_cnd.cn_nameiop = DELETE;
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos,
&dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE);
if (dirp) {
if (v3) {
dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred,
procp);
} else {
vrele(dirp);
dirp = NULL;
}
}
if (error) {
nfsm_reply(NFSX_WCCDATA(v3));
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
goto nfsmout;
}
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:
/*
* Issue or abort op. Since SAVESTART is not set, path name
* component is freed by the VOP after either.
*/
if (!error) {
nqsrv_getl(nd.ni_dvp, ND_WRITE);
nqsrv_getl(vp, ND_WRITE);
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
}
NDFREE(&nd, NDF_ONLY_PNBUF);
if (dirp)
diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp);
nfsm_reply(NFSX_WCCDATA(v3));
if (v3) {
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
error = 0;
}
/* fall through */
nfsmout:
NDFREE(&nd, NDF_ONLY_PNBUF);
if (dirp)
vrele(dirp);
if (nd.ni_dvp) {
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
}
if (nd.ni_vp)
vput(nd.ni_vp);
vn_finished_write(mp);
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
* The nfsm_clget macro is used here so that the reply will be packed
* tightly in mbuf clusters.
* - it only knows that it has encountered eof when the VOP_READDIR()
* reads nothing
* - as such one readdir rpc will return eof false although you are there
* and then the next will return eof
* - it trims out records with d_fileno == 0
* this doesn't matter for Unix clients, but they might confuse clients
* for other os'.
* NB: It is tempting to set eof to true if the VOP_READDIR() reads less
* than requested, but this may not apply to all filesystems. For
* example, client NFS does not { although it is never remote mounted
* anyhow }
* The alternate call nfsrv_readdirplus() does lookups as well.
* PS: The NFS protocol spec. does not clarify what the "count" byte
* argument is a count of.. just name strings and file id's or the
* entire reply rpc or ...
* I tried just file name and id sizes and it confused the Sun client,
* so I am using the full rpc size now. The "paranoia.." comment refers
* to including the status longwords that are not a part of the dir.
* "entry" structures, but are in the rpc.
*/
struct flrep {
nfsuint64 fl_off;
u_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(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register char *bp, *be;
register struct mbuf *mp;
register struct dirent *dp;
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
struct mbuf *mb, *mb2, *mreq, *mp2;
char *cpos, *cend, *cp2, *rbuf;
struct vnode *vp = NULL;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct uio io;
struct iovec iv;
int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies;
int v3 = (nfsd->nd_flag & ND_NFSV3);
u_quad_t frev, off, toff, verf;
u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if (v3) {
nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
toff = fxdr_hyper(tl);
tl += 2;
verf = fxdr_hyper(tl);
tl += 2;
} else {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
toff = fxdr_unsigned(u_quad_t, *tl++);
verf = 0; /* shut up gcc */
}
off = toff;
cnt = fxdr_unsigned(int, *tl);
siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
xfer = NFS_SRVMAXDATA(nfsd);
if (siz > xfer)
siz = xfer;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (!error && vp->v_type != VDIR) {
error = ENOTDIR;
vput(vp);
vp = NULL;
}
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
/*
* Obtain lock on vnode for this section of the code
*/
nqsrv_getl(vp, ND_READ);
if (v3) {
error = getret = VOP_GETATTR(vp, &at, cred, procp);
#if 0
/*
* XXX This check may be too strict for Solaris 2.5 clients.
*/
if (!error && toff && verf && verf != at.va_filerev)
error = NFSERR_BAD_COOKIE;
#endif
}
if (!error)
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0);
if (error) {
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
VOP_UNLOCK(vp, 0, procp);
/*
* end section. Allocate rbuf and continue
*/
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;
eofflag = 0;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, procp);
if (cookies) {
free((caddr_t)cookies, M_TEMP);
cookies = NULL;
}
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
off = (off_t)io.uio_offset;
if (!cookies && !error)
error = NFSERR_PERM;
if (v3) {
getret = VOP_GETATTR(vp, &at, cred, procp);
if (!error)
error = getret;
}
VOP_UNLOCK(vp, 0, procp);
if (error) {
vrele(vp);
vp = NULL;
free((caddr_t)rbuf, M_TEMP);
if (cookies)
free((caddr_t)cookies, M_TEMP);
nfsm_reply(NFSX_POSTOPATTR(v3));
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
vrele(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) +
2 * NFSX_UNSIGNED);
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
tl += 2;
} else
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = nfs_false;
*tl = nfs_true;
FREE((caddr_t)rbuf, M_TEMP);
FREE((caddr_t)cookies, M_TEMP);
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;
cookiep = cookies;
/*
* For some reason FreeBSD's ufs_readdir() chooses to back the
* directory offset up to a block boundary, so it is necessary to
* skip over the records that preceed the requested offset. This
* requires the assumption that file offset cookies monotonically
* increase.
*/
while (cpos < cend && ncookies > 0 &&
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
((u_quad_t)(*cookiep)) <= toff)) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend || ncookies == 0) {
toff = off;
siz = fullsiz;
goto again;
}
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz);
if (v3) {
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
}
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend && ncookies > 0) {
if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen) - nlen;
len += (4 * NFSX_UNSIGNED + nlen + rem);
if (v3)
len += 2 * NFSX_UNSIGNED;
if (len > cnt) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
if (v3) {
nfsm_clget;
*tl = 0;
bp += NFSX_UNSIGNED;
}
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp+xfer) > be)
tsiz = be-bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a int32_t boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
nfsm_clget;
/* Finish off the record */
if (v3) {
*tl = 0;
bp += NFSX_UNSIGNED;
nfsm_clget;
}
*tl = txdr_unsigned(*cookiep);
bp += NFSX_UNSIGNED;
}
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
vrele(vp);
vp = NULL;
nfsm_clget;
*tl = nfs_false;
bp += NFSX_UNSIGNED;
nfsm_clget;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
bp += NFSX_UNSIGNED;
if (mp != mb) {
if (bp < be)
mp->m_len = bp - mtod(mp, caddr_t);
} else
mp->m_len += bp - bpos;
FREE((caddr_t)rbuf, M_TEMP);
FREE((caddr_t)cookies, M_TEMP);
nfsmout:
if (vp)
vrele(vp);
return(error);
}
int
nfsrv_readdirplus(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register char *bp, *be;
register struct mbuf *mp;
register struct dirent *dp;
register caddr_t cp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
struct mbuf *mb, *mb2, *mreq, *mp2;
char *cpos, *cend, *cp2, *rbuf;
struct vnode *vp = NULL, *nvp;
struct flrep fl;
nfsfh_t nfh;
fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh;
struct uio io;
struct iovec iv;
struct vattr va, at, *vap = &va;
struct nfs_fattr *fp;
int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies;
u_quad_t frev, off, toff, verf;
u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
toff = fxdr_hyper(tl);
tl += 2;
verf = fxdr_hyper(tl);
tl += 2;
siz = fxdr_unsigned(int, *tl++);
cnt = fxdr_unsigned(int, *tl);
off = toff;
siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
xfer = NFS_SRVMAXDATA(nfsd);
if (siz > xfer)
siz = xfer;
fullsiz = siz;
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (!error && vp->v_type != VDIR) {
error = ENOTDIR;
vput(vp);
vp = NULL;
}
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
error = getret = VOP_GETATTR(vp, &at, cred, procp);
#if 0
/*
* XXX This check may be too strict for Solaris 2.5 clients.
*/
if (!error && toff && verf && verf != at.va_filerev)
error = NFSERR_BAD_COOKIE;
#endif
if (!error) {
nqsrv_getl(vp, ND_READ);
error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0);
}
if (error) {
vput(vp);
vp = NULL;
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
VOP_UNLOCK(vp, 0, procp);
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;
eofflag = 0;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, procp);
if (cookies) {
free((caddr_t)cookies, M_TEMP);
cookies = NULL;
}
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
off = (u_quad_t)io.uio_offset;
getret = VOP_GETATTR(vp, &at, cred, procp);
VOP_UNLOCK(vp, 0, procp);
if (!cookies && !error)
error = NFSERR_PERM;
if (!error)
error = getret;
if (error) {
vrele(vp);
vp = NULL;
if (cookies)
free((caddr_t)cookies, M_TEMP);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
if (io.uio_resid) {
siz -= io.uio_resid;
/*
* If nothing read, return eof
* rpc reply
*/
if (siz == 0) {
vrele(vp);
vp = NULL;
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
2 * NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
tl += 2;
*tl++ = nfs_false;
*tl = nfs_true;
FREE((caddr_t)cookies, M_TEMP);
FREE((caddr_t)rbuf, M_TEMP);
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;
cookiep = cookies;
/*
* For some reason FreeBSD's ufs_readdir() chooses to back the
* directory offset up to a block boundary, so it is necessary to
* skip over the records that preceed the requested offset. This
* requires the assumption that file offset cookies monotonically
* increase.
*/
while (cpos < cend && ncookies > 0 &&
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
((u_quad_t)(*cookiep)) <= toff)) {
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
if (cpos >= cend || ncookies == 0) {
toff = off;
siz = fullsiz;
goto again;
}
/*
* Probe one of the directory entries to see if the filesystem
* supports VGET.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp) == EOPNOTSUPP) {
error = NFSERR_NOTSUPP;
vrele(vp);
vp = NULL;
free((caddr_t)cookies, M_TEMP);
free((caddr_t)rbuf, M_TEMP);
nfsm_reply(NFSX_V3POSTOPATTR);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
vput(nvp);
nvp = NULL;
dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED;
nfsm_reply(cnt);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
txdr_hyper(at.va_filerev, tl);
mp = mp2 = mb;
bp = bpos;
be = bp + M_TRAILINGSPACE(mp);
/* Loop through the records and build reply */
while (cpos < cend && ncookies > 0) {
if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
nlen = dp->d_namlen;
rem = nfsm_rndup(nlen)-nlen;
/*
* For readdir_and_lookup get the vnode using
* the file number.
*/
if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp))
goto invalid;
bzero((caddr_t)nfhp, NFSX_V3FH);
nfhp->fh_fsid =
nvp->v_mount->mnt_stat.f_fsid;
if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) {
vput(nvp);
nvp = NULL;
goto invalid;
}
if (VOP_GETATTR(nvp, vap, cred, procp)) {
vput(nvp);
nvp = NULL;
goto invalid;
}
vput(nvp);
nvp = NULL;
/*
* If either the dircount or maxcount will be
* exceeded, get out now. Both of these lengths
* are calculated conservatively, including all
* XDR overheads.
*/
len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH +
NFSX_V3POSTOPATTR);
dirlen += (6 * NFSX_UNSIGNED + nlen + rem);
if (len > cnt || dirlen > fullsiz) {
eofflag = 0;
break;
}
/*
* Build the directory record xdr from
* the dirent entry.
*/
fp = (struct nfs_fattr *)&fl.fl_fattr;
nfsm_srvfillattr(vap, fp);
fl.fl_fhsize = txdr_unsigned(NFSX_V3FH);
fl.fl_fhok = nfs_true;
fl.fl_postopok = nfs_true;
fl.fl_off.nfsuquad[0] = 0;
fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep);
nfsm_clget;
*tl = nfs_true;
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = 0;
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(dp->d_fileno);
bp += NFSX_UNSIGNED;
nfsm_clget;
*tl = txdr_unsigned(nlen);
bp += NFSX_UNSIGNED;
/* And loop around copying the name */
xfer = nlen;
cp = dp->d_name;
while (xfer > 0) {
nfsm_clget;
if ((bp + xfer) > be)
tsiz = be - bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
/* And null pad to a int32_t boundary */
for (i = 0; i < rem; i++)
*bp++ = '\0';
/*
* Now copy the flrep structure out.
*/
xfer = sizeof (struct flrep);
cp = (caddr_t)&fl;
while (xfer > 0) {
nfsm_clget;
if ((bp + xfer) > be)
tsiz = be - bp;
else
tsiz = xfer;
bcopy(cp, bp, tsiz);
bp += tsiz;
xfer -= tsiz;
if (xfer > 0)
cp += tsiz;
}
}
invalid:
cpos += dp->d_reclen;
dp = (struct dirent *)cpos;
cookiep++;
ncookies--;
}
vrele(vp);
vp = NULL;
nfsm_clget;
*tl = nfs_false;
bp += NFSX_UNSIGNED;
nfsm_clget;
if (eofflag)
*tl = nfs_true;
else
*tl = nfs_false;
bp += NFSX_UNSIGNED;
if (mp != mb) {
if (bp < be)
mp->m_len = bp - mtod(mp, caddr_t);
} else
mp->m_len += bp - bpos;
FREE((caddr_t)cookies, M_TEMP);
FREE((caddr_t)rbuf, M_TEMP);
nfsmout:
if (vp)
vrele(vp);
return(error);
}
/*
* nfs commit service
*/
int
nfsrv_commit(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
struct vattr bfor, aft;
struct vnode *vp = NULL;
nfsfh_t nfh;
fhandle_t *fhp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
u_quad_t frev, off;
struct mount *mp = NULL;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL)
return (ESTALE);
if ((error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp)) != NULL)
return (error);
(void) vn_start_write(vp, &mp, V_WAIT);
vput(vp);
vp = NULL;
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
/*
* 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);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(2 * NFSX_UNSIGNED);
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
error = 0;
goto nfsmout;
}
for_ret = VOP_GETATTR(vp, &bfor, cred, procp);
if (cnt > MAX_COMMIT_COUNT) {
/*
* Give up and do the whole thing
*/
if (vp->v_object &&
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
}
error = VOP_FSYNC(vp, cred, MNT_WAIT, procp);
} else {
/*
* Locate and synchronously write any buffers that fall
* into the requested range. Note: we are assuming that
* f_iosize is a power of 2.
*/
int iosize = vp->v_mount->mnt_stat.f_iosize;
int iomask = iosize - 1;
int s;
daddr_t lblkno;
/*
* Align to iosize boundry, super-align to page boundry.
*/
if (off & iomask) {
cnt += off & iomask;
off &= ~(u_quad_t)iomask;
}
if (off & PAGE_MASK) {
cnt += off & PAGE_MASK;
off &= ~(u_quad_t)PAGE_MASK;
}
lblkno = off / iosize;
if (vp->v_object &&
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
vm_object_page_clean(vp->v_object, off / PAGE_SIZE, (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC);
}
s = splbio();
while (cnt > 0) {
struct buf *bp;
/*
* If we have a buffer and it is marked B_DELWRI we
* have to lock and write it. Otherwise the prior
* write is assumed to have already been committed.
*/
if ((bp = gbincore(vp, lblkno)) != NULL && (bp->b_flags & B_DELWRI)) {
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL);
continue; /* retry */
}
bremfree(bp);
bp->b_flags &= ~B_ASYNC;
BUF_WRITE(bp);
++nfs_commit_miss;
}
++nfs_commit_blks;
if (cnt < iosize)
break;
cnt -= iosize;
++lblkno;
}
splx(s);
}
aft_ret = VOP_GETATTR(vp, &aft, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF);
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
if (!error) {
nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF);
if (nfsver.tv_sec == 0)
nfsver = boottime;
*tl++ = txdr_unsigned(nfsver.tv_sec);
*tl = txdr_unsigned(nfsver.tv_usec);
} else {
error = 0;
}
nfsmout:
if (vp)
vput(vp);
vn_finished_write(mp);
return(error);
}
/*
* nfs statfs service
*/
int
nfsrv_statfs(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register struct statfs *sf;
register struct nfs_statfs *sfp;
register u_int32_t *tl;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1;
int v3 = (nfsd->nd_flag & ND_NFSV3);
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp = NULL;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
struct statfs statfs;
u_quad_t frev, tval;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
sf = &statfs;
error = VFS_STATFS(vp->v_mount, sf, procp);
getret = VOP_GETATTR(vp, &at, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3));
if (v3)
nfsm_srvpostop_attr(getret, &at);
if (error) {
error = 0;
goto nfsmout;
}
nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
if (v3) {
tval = (u_quad_t)sf->f_blocks;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(tval, &sfp->sf_tbytes);
tval = (u_quad_t)sf->f_bfree;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(tval, &sfp->sf_fbytes);
tval = (u_quad_t)sf->f_bavail;
tval *= (u_quad_t)sf->f_bsize;
txdr_hyper(tval, &sfp->sf_abytes);
sfp->sf_tfiles.nfsuquad[0] = 0;
sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files);
sfp->sf_ffiles.nfsuquad[0] = 0;
sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
sfp->sf_afiles.nfsuquad[0] = 0;
sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
sfp->sf_invarsec = 0;
} else {
sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
sfp->sf_bsize = txdr_unsigned(sf->f_bsize);
sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
}
nfsmout:
if (vp)
vput(vp);
return(error);
}
/*
* nfs fsinfo service
*/
int
nfsrv_fsinfo(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_int32_t *tl;
register struct nfsv3_fsinfo *sip;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1, pref;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp = NULL;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev, maxfsize;
struct statfs sb;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
error = 0;
goto nfsmout;
}
/* XXX Try to make a guess on the max file size. */
VFS_STATFS(vp->v_mount, &sb, procp);
maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1;
getret = VOP_GETATTR(vp, &at, cred, procp);
vput(vp);
vp = NULL;
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO);
nfsm_srvpostop_attr(getret, &at);
nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
/*
* XXX
* There should be file system VFS OP(s) to get this information.
* For now, assume ufs.
*/
if (slp->ns_so->so_type == SOCK_DGRAM)
pref = NFS_MAXDGRAMDATA;
else
pref = NFS_MAXDATA;
sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA);
sip->fs_rtpref = txdr_unsigned(pref);
sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE);
sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA);
sip->fs_wtpref = txdr_unsigned(pref);
sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE);
sip->fs_dtpref = txdr_unsigned(pref);
txdr_hyper(maxfsize, &sip->fs_maxfilesize);
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:
if (vp)
vput(vp);
return(error);
}
/*
* nfs pathconf service
*/
int
nfsrv_pathconf(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
struct sockaddr *nam = nfsd->nd_nam;
caddr_t dpos = nfsd->nd_dpos;
struct ucred *cred = &nfsd->nd_cr;
register u_int32_t *tl;
register struct nfsv3_pathconf *pc;
register int32_t t1;
caddr_t bpos;
int error = 0, rdonly, cache, getret = 1;
register_t linkmax, namemax, chownres, notrunc;
char *cp2;
struct mbuf *mb, *mb2, *mreq;
struct vnode *vp = NULL;
struct vattr at;
nfsfh_t nfh;
fhandle_t *fhp;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
fhp = &nfh.fh_generic;
nfsm_srvmtofh(fhp);
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam,
&rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE);
if (error) {
nfsm_reply(NFSX_UNSIGNED);
nfsm_srvpostop_attr(getret, &at);
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);
vp = NULL;
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF);
nfsm_srvpostop_attr(getret, &at);
if (error) {
error = 0;
goto nfsmout;
}
nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF);
pc->pc_linkmax = txdr_unsigned(linkmax);
pc->pc_namemax = txdr_unsigned(namemax);
pc->pc_notrunc = txdr_unsigned(notrunc);
pc->pc_chownrestricted = txdr_unsigned(chownres);
/*
* These should probably be supported by VOP_PATHCONF(), but
* until msdosfs is exportable (why would you want to?), the
* Unix defaults should be ok.
*/
pc->pc_caseinsensitive = nfs_false;
pc->pc_casepreserving = nfs_true;
nfsmout:
if (vp)
vput(vp);
return(error);
}
/*
* Null operation, used by clients to ping server
*/
/* ARGSUSED */
int
nfsrv_null(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep;
caddr_t bpos;
int error = NFSERR_RETVOID, cache;
struct mbuf *mb, *mreq;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
nfsm_reply(0);
nfsm_srvdone;
}
/*
* No operation, used for obsolete procedures
*/
/* ARGSUSED */
int
nfsrv_noop(nfsd, slp, procp, mrq)
struct nfsrv_descript *nfsd;
struct nfssvc_sock *slp;
struct proc *procp;
struct mbuf **mrq;
{
struct mbuf *mrep = nfsd->nd_mrep;
caddr_t bpos;
int error, cache;
struct mbuf *mb, *mreq;
u_quad_t frev;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
#ifndef nolint
cache = 0;
#endif
if (nfsd->nd_repstat)
error = nfsd->nd_repstat;
else
error = EPROCUNAVAIL;
nfsm_reply(0);
nfsm_srvdone;
}
/*
* 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.
*
* The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS()
* will return EPERM instead of EACCESS. EPERM is always an error.
*/
static int
nfsrv_access(vp, flags, cred, rdonly, p, override)
register struct vnode *vp;
int flags;
register struct ucred *cred;
int rdonly;
struct proc *p;
int override;
{
struct vattr vattr;
int error;
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
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, we can't allow writing.
*/
if (vp->v_flag & VTEXT)
return (ETXTBSY);
}
error = VOP_GETATTR(vp, &vattr, cred, p);
if (error)
return (error);
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 && cred->cr_uid == vattr.va_uid)
error = 0;
return error;
}
#endif /* NFS_NOSERVER */
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