9733a80839
It's not finished yet (I still have to find a way to implement process- dependent nodes without consuming too much memory, and the permission system needs tightening up), but it's becoming hard to work on without a repo (I've accidentally almost nuked it once already), and it works (except for the lack of process-dependent nodes, that is). I was supposed to commit this a week ago, but timed out waiting for jkh to reply to some questions I had. Pass him a spoonful of bad karma :)
173 lines
4.0 KiB
C
173 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <fs/pseudofs/pseudofs.h>
|
|
#include <fs/pseudofs/pseudofs_internal.h>
|
|
|
|
SYSCTL_NODE(_vfs, OID_AUTO, pfs, CTLFLAG_RW, 0,
|
|
"pseudofs");
|
|
|
|
/*
|
|
* Mount a pseudofs instance
|
|
*/
|
|
int
|
|
pfs_mount(struct pfs_info *pi, struct mount *mp, char *path, caddr_t data,
|
|
struct nameidata *ndp, struct proc *p)
|
|
{
|
|
struct statfs *sbp;
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE)
|
|
return (EOPNOTSUPP);
|
|
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
mp->mnt_data = (qaddr_t)pi;
|
|
vfs_getnewfsid(mp);
|
|
|
|
sbp = &mp->mnt_stat;
|
|
bcopy(pi->pi_name, sbp->f_mntfromname, sizeof pi->pi_name);
|
|
sbp->f_bsize = PAGE_SIZE;
|
|
sbp->f_iosize = PAGE_SIZE;
|
|
sbp->f_blocks = 1;
|
|
sbp->f_bfree = 0;
|
|
sbp->f_bavail = 0;
|
|
sbp->f_files = 1;
|
|
sbp->f_ffree = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Unmount a pseudofs instance
|
|
*/
|
|
int
|
|
pfs_unmount(struct mount *mp, int mntflags, struct proc *p)
|
|
{
|
|
struct pfs_info *pi;
|
|
int error;
|
|
|
|
pi = (struct pfs_info *)mp->mnt_data;
|
|
|
|
/* XXX do stuff with pi... */
|
|
|
|
error = vflush(mp, 0, (mntflags & MNT_FORCE) ? FORCECLOSE : 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return a root vnode
|
|
*/
|
|
int
|
|
pfs_root(struct mount *mp, struct vnode **vpp)
|
|
{
|
|
struct pfs_info *pi;
|
|
|
|
pi = (struct pfs_info *)mp->mnt_data;
|
|
return pfs_vncache_alloc(mp, vpp, pi->pi_root);
|
|
}
|
|
|
|
/*
|
|
* Return filesystem stats
|
|
*/
|
|
int
|
|
pfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
|
|
{
|
|
bcopy(&mp->mnt_stat, sbp, sizeof *sbp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initialize a pseudofs instance
|
|
*/
|
|
int
|
|
pfs_init(struct pfs_info *pi, struct vfsconf *vfc)
|
|
{
|
|
mtx_init(&pi->pi_mutex, "pseudofs", MTX_DEF);
|
|
pfs_fileno_init(pi);
|
|
printf("%s registered\n", pi->pi_name);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Destroy a pseudofs instance
|
|
*/
|
|
int
|
|
pfs_uninit(struct pfs_info *pi, struct vfsconf *vfc)
|
|
{
|
|
pfs_fileno_uninit(pi);
|
|
mtx_destroy(&pi->pi_mutex);
|
|
printf("%s unregistered\n", pi->pi_name);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handle load / unload events
|
|
*/
|
|
static int
|
|
pfs_modevent(module_t mod, int evt, void *arg)
|
|
{
|
|
switch (evt) {
|
|
case MOD_LOAD:
|
|
pfs_fileno_load();
|
|
pfs_vncache_load();
|
|
break;
|
|
case MOD_UNLOAD:
|
|
case MOD_SHUTDOWN:
|
|
pfs_vncache_unload();
|
|
pfs_fileno_unload();
|
|
break;
|
|
default:
|
|
printf("pseudofs: unexpected event type %d\n", evt);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Module declaration
|
|
*/
|
|
static moduledata_t pseudofs_data = {
|
|
"pseudofs",
|
|
pfs_modevent,
|
|
NULL
|
|
};
|
|
DECLARE_MODULE(pseudofs, pseudofs_data, SI_SUB_EXEC, SI_ORDER_FIRST);
|
|
MODULE_VERSION(pseudofs, 1);
|