f257b7a54b
This is to allow filesystems to decide based on the passed thread which vnode to return. Several filesystems used curthread, they now use the passed thread.
408 lines
11 KiB
C
408 lines
11 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*
|
|
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <net/radix.h>
|
|
|
|
static MALLOC_DEFINE(M_NETADDR, "Export Host", "Export host address structure");
|
|
|
|
static void vfs_free_addrlist(struct netexport *nep);
|
|
static int vfs_free_netcred(struct radix_node *rn, void *w);
|
|
static int vfs_hang_addrlist(struct mount *mp, struct netexport *nep,
|
|
struct export_args *argp);
|
|
|
|
/*
|
|
* Network address lookup element
|
|
*/
|
|
struct netcred {
|
|
struct radix_node netc_rnodes[2];
|
|
int netc_exflags;
|
|
struct ucred netc_anon;
|
|
};
|
|
|
|
/*
|
|
* Network export information
|
|
*/
|
|
struct netexport {
|
|
struct netcred ne_defexported; /* Default export */
|
|
struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
|
|
};
|
|
|
|
/*
|
|
* Build hash lists of net addresses and hang them off the mount point.
|
|
* Called by ufs_mount() to set up the lists of export addresses.
|
|
*/
|
|
static int
|
|
vfs_hang_addrlist(mp, nep, argp)
|
|
struct mount *mp;
|
|
struct netexport *nep;
|
|
struct export_args *argp;
|
|
{
|
|
register struct netcred *np;
|
|
register struct radix_node_head *rnh;
|
|
register int i;
|
|
struct radix_node *rn;
|
|
struct sockaddr *saddr, *smask = 0;
|
|
struct domain *dom;
|
|
int error;
|
|
|
|
/*
|
|
* XXX: This routine converts from a `struct xucred'
|
|
* (argp->ex_anon) to a `struct ucred' (np->netc_anon). This
|
|
* operation is questionable; for example, what should be done
|
|
* with fields like cr_uidinfo and cr_prison? Currently, this
|
|
* routine does not touch them (leaves them as NULL).
|
|
*/
|
|
if (argp->ex_anon.cr_version != XUCRED_VERSION)
|
|
return (EINVAL);
|
|
|
|
if (argp->ex_addrlen == 0) {
|
|
if (mp->mnt_flag & MNT_DEFEXPORTED)
|
|
return (EPERM);
|
|
np = &nep->ne_defexported;
|
|
np->netc_exflags = argp->ex_flags;
|
|
bzero(&np->netc_anon, sizeof(np->netc_anon));
|
|
np->netc_anon.cr_uid = argp->ex_anon.cr_uid;
|
|
np->netc_anon.cr_ngroups = argp->ex_anon.cr_ngroups;
|
|
bcopy(argp->ex_anon.cr_groups, np->netc_anon.cr_groups,
|
|
sizeof(np->netc_anon.cr_groups));
|
|
np->netc_anon.cr_ref = 1;
|
|
mp->mnt_flag |= MNT_DEFEXPORTED;
|
|
return (0);
|
|
}
|
|
|
|
#if MSIZE <= 256
|
|
if (argp->ex_addrlen > MLEN)
|
|
return (EINVAL);
|
|
#endif
|
|
|
|
i = sizeof(struct netcred) + argp->ex_addrlen + argp->ex_masklen;
|
|
np = (struct netcred *) malloc(i, M_NETADDR, M_WAITOK | M_ZERO);
|
|
saddr = (struct sockaddr *) (np + 1);
|
|
if ((error = copyin(argp->ex_addr, saddr, argp->ex_addrlen)))
|
|
goto out;
|
|
if (saddr->sa_len > argp->ex_addrlen)
|
|
saddr->sa_len = argp->ex_addrlen;
|
|
if (argp->ex_masklen) {
|
|
smask = (struct sockaddr *)((caddr_t)saddr + argp->ex_addrlen);
|
|
error = copyin(argp->ex_mask, smask, argp->ex_masklen);
|
|
if (error)
|
|
goto out;
|
|
if (smask->sa_len > argp->ex_masklen)
|
|
smask->sa_len = argp->ex_masklen;
|
|
}
|
|
i = saddr->sa_family;
|
|
if ((rnh = nep->ne_rtable[i]) == NULL) {
|
|
/*
|
|
* Seems silly to initialize every AF when most are not used,
|
|
* do so on demand here
|
|
*/
|
|
for (dom = domains; dom; dom = dom->dom_next)
|
|
if (dom->dom_family == i && dom->dom_rtattach) {
|
|
dom->dom_rtattach((void **) &nep->ne_rtable[i],
|
|
dom->dom_rtoffset);
|
|
break;
|
|
}
|
|
if ((rnh = nep->ne_rtable[i]) == NULL) {
|
|
error = ENOBUFS;
|
|
goto out;
|
|
}
|
|
}
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
rn = (*rnh->rnh_addaddr)(saddr, smask, rnh, np->netc_rnodes);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
if (rn == NULL || np != (struct netcred *)rn) { /* already exists */
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
np->netc_exflags = argp->ex_flags;
|
|
bzero(&np->netc_anon, sizeof(np->netc_anon));
|
|
np->netc_anon.cr_uid = argp->ex_anon.cr_uid;
|
|
np->netc_anon.cr_ngroups = argp->ex_anon.cr_ngroups;
|
|
bcopy(argp->ex_anon.cr_groups, np->netc_anon.cr_groups,
|
|
sizeof(np->netc_anon.cr_groups));
|
|
np->netc_anon.cr_ref = 1;
|
|
return (0);
|
|
out:
|
|
free(np, M_NETADDR);
|
|
return (error);
|
|
}
|
|
|
|
/* Helper for vfs_free_addrlist. */
|
|
/* ARGSUSED */
|
|
static int
|
|
vfs_free_netcred(rn, w)
|
|
struct radix_node *rn;
|
|
void *w;
|
|
{
|
|
register struct radix_node_head *rnh = (struct radix_node_head *) w;
|
|
|
|
(*rnh->rnh_deladdr) (rn->rn_key, rn->rn_mask, rnh);
|
|
free(rn, M_NETADDR);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free the net address hash lists that are hanging off the mount points.
|
|
*/
|
|
static void
|
|
vfs_free_addrlist(nep)
|
|
struct netexport *nep;
|
|
{
|
|
register int i;
|
|
register struct radix_node_head *rnh;
|
|
|
|
for (i = 0; i <= AF_MAX; i++)
|
|
if ((rnh = nep->ne_rtable[i])) {
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
(*rnh->rnh_walktree) (rnh, vfs_free_netcred, rnh);
|
|
RADIX_NODE_HEAD_DESTROY(rnh);
|
|
free(rnh, M_RTABLE);
|
|
nep->ne_rtable[i] = NULL; /* not SMP safe XXX */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* High level function to manipulate export options on a mount point
|
|
* and the passed in netexport.
|
|
* Struct export_args *argp is the variable used to twiddle options,
|
|
* the structure is described in sys/mount.h
|
|
*/
|
|
int
|
|
vfs_export(mp, argp)
|
|
struct mount *mp;
|
|
struct export_args *argp;
|
|
{
|
|
struct netexport *nep;
|
|
int error;
|
|
|
|
nep = mp->mnt_export;
|
|
if (argp->ex_flags & MNT_DELEXPORT) {
|
|
if (nep == NULL)
|
|
return (ENOENT);
|
|
if (mp->mnt_flag & MNT_EXPUBLIC) {
|
|
vfs_setpublicfs(NULL, NULL, NULL);
|
|
mp->mnt_flag &= ~MNT_EXPUBLIC;
|
|
}
|
|
vfs_free_addrlist(nep);
|
|
mp->mnt_export = NULL;
|
|
free(nep, M_MOUNT);
|
|
mp->mnt_flag &= ~(MNT_EXPORTED | MNT_DEFEXPORTED);
|
|
}
|
|
if (argp->ex_flags & MNT_EXPORTED) {
|
|
if (nep == NULL) {
|
|
nep = malloc(sizeof(struct netexport), M_MOUNT, M_WAITOK | M_ZERO);
|
|
mp->mnt_export = nep;
|
|
}
|
|
if (argp->ex_flags & MNT_EXPUBLIC) {
|
|
if ((error = vfs_setpublicfs(mp, nep, argp)) != 0)
|
|
return (error);
|
|
mp->mnt_flag |= MNT_EXPUBLIC;
|
|
}
|
|
if ((error = vfs_hang_addrlist(mp, nep, argp)))
|
|
return (error);
|
|
mp->mnt_flag |= MNT_EXPORTED;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Set the publicly exported filesystem (WebNFS). Currently, only
|
|
* one public filesystem is possible in the spec (RFC 2054 and 2055)
|
|
*/
|
|
int
|
|
vfs_setpublicfs(mp, nep, argp)
|
|
struct mount *mp;
|
|
struct netexport *nep;
|
|
struct export_args *argp;
|
|
{
|
|
int error;
|
|
struct vnode *rvp;
|
|
char *cp;
|
|
|
|
/*
|
|
* mp == NULL -> invalidate the current info, the FS is
|
|
* no longer exported. May be called from either vfs_export
|
|
* or unmount, so check if it hasn't already been done.
|
|
*/
|
|
if (mp == NULL) {
|
|
if (nfs_pub.np_valid) {
|
|
nfs_pub.np_valid = 0;
|
|
if (nfs_pub.np_index != NULL) {
|
|
FREE(nfs_pub.np_index, M_TEMP);
|
|
nfs_pub.np_index = NULL;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Only one allowed at a time.
|
|
*/
|
|
if (nfs_pub.np_valid != 0 && mp != nfs_pub.np_mount)
|
|
return (EBUSY);
|
|
|
|
/*
|
|
* Get real filehandle for root of exported FS.
|
|
*/
|
|
bzero(&nfs_pub.np_handle, sizeof(nfs_pub.np_handle));
|
|
nfs_pub.np_handle.fh_fsid = mp->mnt_stat.f_fsid;
|
|
|
|
if ((error = VFS_ROOT(mp, &rvp, curthread /* XXX */)))
|
|
return (error);
|
|
|
|
if ((error = VFS_VPTOFH(rvp, &nfs_pub.np_handle.fh_fid)))
|
|
return (error);
|
|
|
|
vput(rvp);
|
|
|
|
/*
|
|
* If an indexfile was specified, pull it in.
|
|
*/
|
|
if (argp->ex_indexfile != NULL) {
|
|
MALLOC(nfs_pub.np_index, char *, MAXNAMLEN + 1, M_TEMP,
|
|
M_WAITOK);
|
|
error = copyinstr(argp->ex_indexfile, nfs_pub.np_index,
|
|
MAXNAMLEN, (size_t *)0);
|
|
if (!error) {
|
|
/*
|
|
* Check for illegal filenames.
|
|
*/
|
|
for (cp = nfs_pub.np_index; *cp; cp++) {
|
|
if (*cp == '/') {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (error) {
|
|
FREE(nfs_pub.np_index, M_TEMP);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
nfs_pub.np_mount = mp;
|
|
nfs_pub.np_valid = 1;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Used by the filesystems to determine if a given network address
|
|
* (passed in 'nam') is present in thier exports list, returns a pointer
|
|
* to struct netcred so that the filesystem can examine it for
|
|
* access rights (read/write/etc).
|
|
*/
|
|
struct netcred *
|
|
vfs_export_lookup(mp, nam)
|
|
register struct mount *mp;
|
|
struct sockaddr *nam;
|
|
{
|
|
struct netexport *nep;
|
|
register struct netcred *np;
|
|
register struct radix_node_head *rnh;
|
|
struct sockaddr *saddr;
|
|
|
|
nep = mp->mnt_export;
|
|
if (nep == NULL)
|
|
return (NULL);
|
|
np = NULL;
|
|
if (mp->mnt_flag & MNT_EXPORTED) {
|
|
/*
|
|
* Lookup in the export list first.
|
|
*/
|
|
if (nam != NULL) {
|
|
saddr = nam;
|
|
rnh = nep->ne_rtable[saddr->sa_family];
|
|
if (rnh != NULL) {
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
np = (struct netcred *)
|
|
(*rnh->rnh_matchaddr)(saddr, rnh);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
if (np && np->netc_rnodes->rn_flags & RNF_ROOT)
|
|
np = NULL;
|
|
}
|
|
}
|
|
/*
|
|
* If no address match, use the default if it exists.
|
|
*/
|
|
if (np == NULL && mp->mnt_flag & MNT_DEFEXPORTED)
|
|
np = &nep->ne_defexported;
|
|
}
|
|
return (np);
|
|
}
|
|
|
|
/*
|
|
* XXX: This comment comes from the deprecated ufs_check_export()
|
|
* XXX: and may not entirely apply, but lacking something better:
|
|
* This is the generic part of fhtovp called after the underlying
|
|
* filesystem has validated the file handle.
|
|
*
|
|
* Verify that a host should have access to a filesystem.
|
|
*/
|
|
|
|
int
|
|
vfs_stdcheckexp(mp, nam, extflagsp, credanonp)
|
|
struct mount *mp;
|
|
struct sockaddr *nam;
|
|
int *extflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
struct netcred *np;
|
|
|
|
np = vfs_export_lookup(mp, nam);
|
|
if (np == NULL)
|
|
return (EACCES);
|
|
*extflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
return (0);
|
|
}
|
|
|