259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993, 1995
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software donated to Berkeley by
|
|
* Jan-Simon Pendry.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Portal Filesystem
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/file.h> /* Must come after sys/malloc.h */
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <fs/portalfs/portal.h>
|
|
|
|
static MALLOC_DEFINE(M_PORTALFSMNT, "portal_mount", "PORTAL mount structure");
|
|
|
|
static vfs_unmount_t portal_unmount;
|
|
static vfs_root_t portal_root;
|
|
static vfs_statfs_t portal_statfs;
|
|
|
|
static const char *portal_opts[] = {
|
|
"socket", "config",
|
|
NULL
|
|
};
|
|
|
|
static int
|
|
portal_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
|
|
{
|
|
struct portal_args args;
|
|
int error;
|
|
|
|
if (data == NULL)
|
|
return (EINVAL);
|
|
error = copyin(data, &args, sizeof args);
|
|
if (error)
|
|
return (error);
|
|
|
|
ma = mount_argf(ma, "socket", "%d", args.pa_socket);
|
|
ma = mount_argsu(ma, "config", args.pa_config, MAXPATHLEN);
|
|
error = kernel_mount(ma, flags);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Mount the per-process file descriptors (/dev/fd)
|
|
*/
|
|
static int
|
|
portal_mount(struct mount *mp, struct thread *td)
|
|
{
|
|
struct file *fp;
|
|
struct portalmount *fmp;
|
|
struct socket *so;
|
|
struct vnode *rvp;
|
|
struct portalnode *pn;
|
|
int error, v;
|
|
char *p;
|
|
|
|
if (vfs_filteropt(mp->mnt_optnew, portal_opts))
|
|
return (EINVAL);
|
|
|
|
error = vfs_scanopt(mp->mnt_optnew, "socket", "%d", &v);
|
|
if (error != 1)
|
|
return (EINVAL);
|
|
error = vfs_getopt(mp->mnt_optnew, "config", (void **)&p, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((error = fget(td, v, &fp)) != 0)
|
|
return (error);
|
|
if (fp->f_type != DTYPE_SOCKET) {
|
|
fdrop(fp, td);
|
|
return(ENOTSOCK);
|
|
}
|
|
so = fp->f_data; /* XXX race against userland */
|
|
if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
|
|
fdrop(fp, td);
|
|
return (ESOCKTNOSUPPORT);
|
|
}
|
|
|
|
pn = malloc(sizeof(struct portalnode),
|
|
M_TEMP, M_WAITOK);
|
|
|
|
fmp = malloc(sizeof(struct portalmount),
|
|
M_PORTALFSMNT, M_WAITOK); /* XXX */
|
|
|
|
error = getnewvnode("portal", mp, &portal_vnodeops, &rvp); /* XXX */
|
|
if (error) {
|
|
free(fmp, M_PORTALFSMNT);
|
|
free(pn, M_TEMP);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
error = insmntque(rvp, mp); /* XXX: Too early for mpsafe fs */
|
|
if (error != 0) {
|
|
free(fmp, M_PORTALFSMNT);
|
|
free(pn, M_TEMP);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
rvp->v_data = pn;
|
|
rvp->v_type = VDIR;
|
|
rvp->v_vflag |= VV_ROOT;
|
|
VTOPORTAL(rvp)->pt_arg = 0;
|
|
VTOPORTAL(rvp)->pt_size = 0;
|
|
VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
|
|
fmp->pm_root = rvp;
|
|
fhold(fp);
|
|
fmp->pm_server = fp;
|
|
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
MNT_IUNLOCK(mp);
|
|
mp->mnt_data = fmp;
|
|
vfs_getnewfsid(mp);
|
|
|
|
vfs_mountedfrom(mp, p);
|
|
fdrop(fp, td);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_unmount(mp, mntflags, td)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct thread *td;
|
|
{
|
|
int error, flags = 0;
|
|
|
|
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
|
|
/*
|
|
* Clear out buffer cache. I don't think we
|
|
* ever get anything cached at this level at the
|
|
* moment, but who knows...
|
|
*/
|
|
#ifdef notyet
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp, 1))
|
|
return (EBUSY);
|
|
#endif
|
|
/* There is 1 extra root vnode reference (pm_root). */
|
|
error = vflush(mp, 1, flags, td);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Shutdown the socket. This will cause the select in the
|
|
* daemon to wake up, and then the accept will get ECONNABORTED
|
|
* which it interprets as a request to go and bury itself.
|
|
*/
|
|
soshutdown(VFSTOPORTAL(mp)->pm_server->f_data, 2);
|
|
/*
|
|
* Discard reference to underlying file. Must call closef because
|
|
* this may be the last reference.
|
|
*/
|
|
closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
|
|
/*
|
|
* Finally, throw away the portalmount structure
|
|
*/
|
|
free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
|
|
mp->mnt_data = 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_root(mp, flags, vpp, td)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *vp;
|
|
|
|
/*
|
|
* Return locked reference to root.
|
|
*/
|
|
vp = VFSTOPORTAL(mp)->pm_root;
|
|
VREF(vp);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_statfs(mp, sbp, td)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct thread *td;
|
|
{
|
|
|
|
sbp->f_flags = 0;
|
|
sbp->f_bsize = DEV_BSIZE;
|
|
sbp->f_iosize = DEV_BSIZE;
|
|
sbp->f_blocks = 2; /* 1K to keep df happy */
|
|
sbp->f_bfree = 0;
|
|
sbp->f_bavail = 0;
|
|
sbp->f_files = 1; /* Allow for "." */
|
|
sbp->f_ffree = 0; /* See comments above */
|
|
return (0);
|
|
}
|
|
|
|
static struct vfsops portal_vfsops = {
|
|
.vfs_cmount = portal_cmount,
|
|
.vfs_mount = portal_mount,
|
|
.vfs_root = portal_root,
|
|
.vfs_statfs = portal_statfs,
|
|
.vfs_unmount = portal_unmount,
|
|
};
|
|
|
|
VFS_SET(portal_vfsops, portalfs, VFCF_SYNTHETIC);
|