1995-10-02 09:24:44 +00:00
|
|
|
/*-
|
2002-09-20 22:26:27 +00:00
|
|
|
* Copyright (c) 1999-2002 Poul-Henning Kamp
|
1995-10-02 09:24:44 +00:00
|
|
|
* 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.
|
|
|
|
* 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.
|
|
|
|
*
|
2002-09-20 22:26:27 +00:00
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
1995-10-02 09:24:44 +00:00
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
2002-09-20 22:26:27 +00:00
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
1995-10-02 09:24:44 +00:00
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2003-06-11 00:56:59 +00:00
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
|
1995-10-02 09:24:44 +00:00
|
|
|
#include <sys/param.h>
|
1999-07-20 09:47:55 +00:00
|
|
|
#include <sys/kernel.h>
|
1995-10-02 10:15:40 +00:00
|
|
|
#include <sys/systm.h>
|
2003-02-20 15:35:54 +00:00
|
|
|
#include <sys/bio.h>
|
2002-02-16 17:44:43 +00:00
|
|
|
#include <sys/lock.h>
|
|
|
|
#include <sys/mutex.h>
|
2001-09-12 08:38:13 +00:00
|
|
|
#include <sys/sysctl.h>
|
1998-06-07 17:13:14 +00:00
|
|
|
#include <sys/module.h>
|
1999-07-20 09:47:55 +00:00
|
|
|
#include <sys/malloc.h>
|
1995-10-02 09:24:44 +00:00
|
|
|
#include <sys/conf.h>
|
1995-12-21 20:09:46 +00:00
|
|
|
#include <sys/vnode.h>
|
1999-07-20 09:47:55 +00:00
|
|
|
#include <sys/queue.h>
|
2003-09-27 12:53:33 +00:00
|
|
|
#include <sys/poll.h>
|
2000-09-02 19:17:34 +00:00
|
|
|
#include <sys/ctype.h>
|
2004-02-21 20:41:11 +00:00
|
|
|
#include <sys/tty.h>
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
#include <sys/ucred.h>
|
1999-08-08 18:43:05 +00:00
|
|
|
#include <machine/stdarg.h>
|
1995-12-21 20:09:46 +00:00
|
|
|
|
2005-08-16 19:08:01 +00:00
|
|
|
#include <fs/devfs/devfs_int.h>
|
|
|
|
|
2004-07-11 19:26:43 +00:00
|
|
|
static MALLOC_DEFINE(M_DEVT, "cdev", "cdev storage");
|
1999-07-20 09:47:55 +00:00
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
static struct mtx devmtx;
|
2004-06-16 09:47:26 +00:00
|
|
|
static void freedev(struct cdev *dev);
|
2005-02-22 15:51:07 +00:00
|
|
|
static void destroy_devl(struct cdev *dev);
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
static struct cdev *make_dev_credv(struct cdevsw *devsw, int minornr,
|
|
|
|
struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt,
|
|
|
|
va_list ap);
|
2004-06-17 17:16:53 +00:00
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
void
|
|
|
|
dev_lock(void)
|
2004-02-21 21:57:26 +00:00
|
|
|
{
|
|
|
|
if (!mtx_initialized(&devmtx))
|
2004-07-11 19:26:43 +00:00
|
|
|
mtx_init(&devmtx, "cdev", NULL, MTX_DEF);
|
2004-02-21 21:57:26 +00:00
|
|
|
mtx_lock(&devmtx);
|
|
|
|
}
|
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
void
|
|
|
|
dev_unlock(void)
|
2004-02-21 21:57:26 +00:00
|
|
|
{
|
2004-09-24 05:54:32 +00:00
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
mtx_unlock(&devmtx);
|
|
|
|
}
|
|
|
|
|
2005-03-31 10:29:57 +00:00
|
|
|
void
|
|
|
|
dev_ref(struct cdev *dev)
|
|
|
|
{
|
|
|
|
|
|
|
|
mtx_assert(&devmtx, MA_NOTOWNED);
|
|
|
|
mtx_lock(&devmtx);
|
|
|
|
dev->si_refcount++;
|
|
|
|
mtx_unlock(&devmtx);
|
|
|
|
}
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
void
|
2005-03-31 06:51:54 +00:00
|
|
|
dev_refl(struct cdev *dev)
|
2004-02-21 21:57:26 +00:00
|
|
|
{
|
2004-09-24 05:54:32 +00:00
|
|
|
|
2005-02-22 14:41:04 +00:00
|
|
|
mtx_assert(&devmtx, MA_OWNED);
|
2004-02-21 21:57:26 +00:00
|
|
|
dev->si_refcount++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2005-02-22 15:51:07 +00:00
|
|
|
dev_rel(struct cdev *dev)
|
2004-02-21 21:57:26 +00:00
|
|
|
{
|
2005-02-22 15:51:07 +00:00
|
|
|
int flag = 0;
|
2004-09-23 07:17:41 +00:00
|
|
|
|
2004-10-01 06:33:39 +00:00
|
|
|
mtx_assert(&devmtx, MA_NOTOWNED);
|
|
|
|
dev_lock();
|
2004-02-21 21:57:26 +00:00
|
|
|
dev->si_refcount--;
|
|
|
|
KASSERT(dev->si_refcount >= 0,
|
|
|
|
("dev_rel(%s) gave negative count", devtoname(dev)));
|
2005-02-22 15:51:07 +00:00
|
|
|
if (dev->si_usecount == 0 &&
|
|
|
|
(dev->si_flags & SI_CHEAPCLONE) && (dev->si_flags & SI_NAMED))
|
2004-02-21 21:57:26 +00:00
|
|
|
if (dev->si_devsw == NULL && dev->si_refcount == 0) {
|
|
|
|
LIST_REMOVE(dev, si_list);
|
2004-10-01 06:33:39 +00:00
|
|
|
flag = 1;
|
2004-02-21 21:57:26 +00:00
|
|
|
}
|
2004-10-01 06:33:39 +00:00
|
|
|
dev_unlock();
|
|
|
|
if (flag)
|
|
|
|
freedev(dev);
|
2004-02-21 21:57:26 +00:00
|
|
|
}
|
2004-10-01 06:33:39 +00:00
|
|
|
|
2004-09-24 05:54:32 +00:00
|
|
|
struct cdevsw *
|
|
|
|
dev_refthread(struct cdev *dev)
|
|
|
|
{
|
|
|
|
struct cdevsw *csw;
|
|
|
|
|
|
|
|
mtx_assert(&devmtx, MA_NOTOWNED);
|
|
|
|
dev_lock();
|
|
|
|
csw = dev->si_devsw;
|
|
|
|
if (csw != NULL)
|
|
|
|
dev->si_threadcount++;
|
|
|
|
dev_unlock();
|
|
|
|
return (csw);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
dev_relthread(struct cdev *dev)
|
|
|
|
{
|
|
|
|
|
|
|
|
mtx_assert(&devmtx, MA_NOTOWNED);
|
|
|
|
dev_lock();
|
|
|
|
dev->si_threadcount--;
|
|
|
|
dev_unlock();
|
|
|
|
}
|
2004-02-21 21:57:26 +00:00
|
|
|
|
2003-09-27 12:53:33 +00:00
|
|
|
int
|
|
|
|
nullop(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
eopnotsupp(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
return (EOPNOTSUPP);
|
|
|
|
}
|
2003-02-20 15:35:54 +00:00
|
|
|
|
|
|
|
static int
|
|
|
|
enxio(void)
|
|
|
|
{
|
|
|
|
return (ENXIO);
|
|
|
|
}
|
|
|
|
|
2003-09-27 12:53:33 +00:00
|
|
|
static int
|
|
|
|
enodev(void)
|
|
|
|
{
|
|
|
|
return (ENODEV);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Define a dead_cdevsw for use when devices leave unexpectedly. */
|
|
|
|
|
2003-02-20 15:35:54 +00:00
|
|
|
#define dead_open (d_open_t *)enxio
|
|
|
|
#define dead_close (d_close_t *)enxio
|
|
|
|
#define dead_read (d_read_t *)enxio
|
|
|
|
#define dead_write (d_write_t *)enxio
|
|
|
|
#define dead_ioctl (d_ioctl_t *)enxio
|
2003-09-27 12:53:33 +00:00
|
|
|
#define dead_poll (d_poll_t *)enodev
|
|
|
|
#define dead_mmap (d_mmap_t *)enodev
|
2003-02-20 15:35:54 +00:00
|
|
|
|
|
|
|
static void
|
|
|
|
dead_strategy(struct bio *bp)
|
|
|
|
{
|
|
|
|
|
|
|
|
biofinish(bp, NULL, ENXIO);
|
|
|
|
}
|
|
|
|
|
2003-02-21 19:00:48 +00:00
|
|
|
#define dead_dump (dumper_t *)enxio
|
2003-02-20 15:35:54 +00:00
|
|
|
#define dead_kqfilter (d_kqfilter_t *)enxio
|
|
|
|
|
|
|
|
static struct cdevsw dead_cdevsw = {
|
2004-02-21 21:10:55 +00:00
|
|
|
.d_version = D_VERSION,
|
|
|
|
.d_flags = D_NEEDGIANT, /* XXX: does dead_strategy need this ? */
|
2003-03-03 12:15:54 +00:00
|
|
|
.d_open = dead_open,
|
|
|
|
.d_close = dead_close,
|
|
|
|
.d_read = dead_read,
|
|
|
|
.d_write = dead_write,
|
|
|
|
.d_ioctl = dead_ioctl,
|
|
|
|
.d_poll = dead_poll,
|
|
|
|
.d_mmap = dead_mmap,
|
|
|
|
.d_strategy = dead_strategy,
|
|
|
|
.d_name = "dead",
|
|
|
|
.d_dump = dead_dump,
|
|
|
|
.d_kqfilter = dead_kqfilter
|
2003-02-20 15:35:54 +00:00
|
|
|
};
|
|
|
|
|
2003-09-27 12:53:33 +00:00
|
|
|
/* Default methods if driver does not specify method */
|
|
|
|
|
|
|
|
#define null_open (d_open_t *)nullop
|
|
|
|
#define null_close (d_close_t *)nullop
|
|
|
|
#define no_read (d_read_t *)enodev
|
|
|
|
#define no_write (d_write_t *)enodev
|
|
|
|
#define no_ioctl (d_ioctl_t *)enodev
|
|
|
|
#define no_mmap (d_mmap_t *)enodev
|
2004-08-15 06:24:42 +00:00
|
|
|
#define no_kqfilter (d_kqfilter_t *)enodev
|
2003-09-27 12:53:33 +00:00
|
|
|
|
|
|
|
static void
|
|
|
|
no_strategy(struct bio *bp)
|
|
|
|
{
|
|
|
|
|
|
|
|
biofinish(bp, NULL, ENODEV);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2004-06-16 09:47:26 +00:00
|
|
|
no_poll(struct cdev *dev __unused, int events, struct thread *td __unused)
|
2003-09-27 12:53:33 +00:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Return true for read/write. If the user asked for something
|
|
|
|
* special, return POLLNVAL, so that clients have a way of
|
|
|
|
* determining reliably whether or not the extended
|
|
|
|
* functionality is present without hard-coding knowledge
|
|
|
|
* of specific filesystem implementations.
|
|
|
|
* Stay in sync with vop_nopoll().
|
|
|
|
*/
|
|
|
|
if (events & ~POLLSTANDARD)
|
|
|
|
return (POLLNVAL);
|
|
|
|
|
|
|
|
return (events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
|
|
|
|
}
|
|
|
|
|
|
|
|
#define no_dump (dumper_t *)enodev
|
2001-10-27 17:44:21 +00:00
|
|
|
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
/*
|
2004-06-22 20:22:24 +00:00
|
|
|
* struct cdev * and u_dev_t primitives
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
int
|
2004-06-16 09:47:26 +00:00
|
|
|
minor(struct cdev *x)
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
{
|
2004-06-17 17:16:53 +00:00
|
|
|
if (x == NULL)
|
|
|
|
return NODEV;
|
2005-03-15 11:33:28 +00:00
|
|
|
return(x->si_drv0 & MAXMINOR);
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
}
|
|
|
|
|
1999-08-15 09:32:47 +00:00
|
|
|
int
|
2004-06-16 09:47:26 +00:00
|
|
|
dev2unit(struct cdev *x)
|
1999-08-15 09:32:47 +00:00
|
|
|
{
|
|
|
|
|
2004-06-17 17:16:53 +00:00
|
|
|
if (x == NULL)
|
|
|
|
return NODEV;
|
2005-01-29 15:10:30 +00:00
|
|
|
return (minor2unit(minor(x)));
|
2005-01-29 15:07:13 +00:00
|
|
|
}
|
|
|
|
|
2005-03-08 10:40:03 +00:00
|
|
|
u_int
|
|
|
|
minor2unit(u_int _minor)
|
2005-01-29 15:07:13 +00:00
|
|
|
{
|
|
|
|
|
2005-01-29 16:50:04 +00:00
|
|
|
KASSERT((_minor & ~MAXMINOR) == 0, ("Illegal minor %x", _minor));
|
2005-03-08 10:40:03 +00:00
|
|
|
return ((_minor & 0xff) | ((_minor >> 8) & 0xffff00));
|
1999-08-15 09:32:47 +00:00
|
|
|
}
|
|
|
|
|
2000-09-19 10:28:44 +00:00
|
|
|
int
|
|
|
|
unit2minor(int unit)
|
|
|
|
{
|
|
|
|
|
2001-03-20 13:24:24 +00:00
|
|
|
KASSERT(unit <= 0xffffff, ("Invalid unit (%d) in unit2minor", unit));
|
2000-09-19 10:28:44 +00:00
|
|
|
return ((unit & 0xff) | ((unit << 8) & ~0xffff));
|
|
|
|
}
|
|
|
|
|
2004-06-16 09:47:26 +00:00
|
|
|
static struct cdev *
|
2000-08-20 21:34:39 +00:00
|
|
|
allocdev(void)
|
|
|
|
{
|
2002-09-27 18:27:10 +00:00
|
|
|
struct cdev *si;
|
2000-08-20 21:34:39 +00:00
|
|
|
|
2004-10-25 13:12:06 +00:00
|
|
|
si = malloc(sizeof *si, M_DEVT, M_USE_RESERVE | M_ZERO | M_WAITOK);
|
2003-02-04 10:32:40 +00:00
|
|
|
si->si_name = si->__si_namebuf;
|
2001-05-26 08:27:58 +00:00
|
|
|
LIST_INIT(&si->si_children);
|
2005-02-22 15:51:07 +00:00
|
|
|
LIST_INIT(&si->si_alist);
|
2000-08-20 21:34:39 +00:00
|
|
|
return (si);
|
|
|
|
}
|
|
|
|
|
2004-06-16 09:47:26 +00:00
|
|
|
static struct cdev *
|
2005-03-29 09:56:21 +00:00
|
|
|
newdev(struct cdevsw *csw, int y, struct cdev *si)
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
{
|
2005-01-24 12:44:56 +00:00
|
|
|
struct cdev *si2;
|
2004-06-17 17:16:53 +00:00
|
|
|
dev_t udev;
|
1999-07-20 09:47:55 +00:00
|
|
|
|
2005-01-24 12:44:56 +00:00
|
|
|
mtx_assert(&devmtx, MA_OWNED);
|
2005-03-29 11:15:54 +00:00
|
|
|
udev = y;
|
2005-03-29 09:56:21 +00:00
|
|
|
LIST_FOREACH(si2, &csw->d_devs, si_list) {
|
2005-03-15 11:33:28 +00:00
|
|
|
if (si2->si_drv0 == udev) {
|
2005-01-24 12:44:56 +00:00
|
|
|
freedev(si);
|
|
|
|
return (si2);
|
|
|
|
}
|
1999-07-20 09:47:55 +00:00
|
|
|
}
|
2005-03-15 11:33:28 +00:00
|
|
|
si->si_drv0 = udev;
|
2005-03-29 09:56:21 +00:00
|
|
|
LIST_INSERT_HEAD(&csw->d_devs, si, si_list);
|
2004-02-15 20:14:47 +00:00
|
|
|
return (si);
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
}
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
static void
|
2004-06-16 09:47:26 +00:00
|
|
|
freedev(struct cdev *dev)
|
1999-08-29 09:09:12 +00:00
|
|
|
{
|
|
|
|
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
if (dev->si_cred != NULL)
|
|
|
|
crfree(dev->si_cred);
|
2004-10-25 13:12:06 +00:00
|
|
|
free(dev, M_DEVT);
|
1999-08-29 09:09:12 +00:00
|
|
|
}
|
|
|
|
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
int
|
2004-06-17 17:16:53 +00:00
|
|
|
uminor(dev_t dev)
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
{
|
2005-01-29 16:50:04 +00:00
|
|
|
return (dev & MAXMINOR);
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2004-06-17 17:16:53 +00:00
|
|
|
umajor(dev_t dev)
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
{
|
2005-01-29 16:50:04 +00:00
|
|
|
return ((dev & ~MAXMINOR) >> 8);
|
Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.
Provide functions to manipulate both types:
major() umajor()
minor() uminor()
makedev() umakedev()
dev2udev() udev2dev()
For now they're functions, they will become in-line functions
after one of the next two steps in this process.
Return major/minor/makedev to macro-hood for userland.
Register a name in cdevsw[] for the "filedescriptor" driver.
In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.
In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits. This will essentially
replace the current "alias" check code (same buck, bigger bang).
A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference. If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.
Without DEVT_FASCIST I belive this patch is a no-op.
Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.
Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
|
|
|
}
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
static void
|
|
|
|
fini_cdevsw(struct cdevsw *devsw)
|
|
|
|
{
|
2005-03-29 11:15:54 +00:00
|
|
|
|
2004-02-23 08:42:55 +00:00
|
|
|
devsw->d_flags &= ~D_INIT;
|
2004-02-21 20:29:52 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
prep_cdevsw(struct cdevsw *devsw)
|
|
|
|
{
|
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_lock();
|
2004-02-21 21:57:26 +00:00
|
|
|
|
2005-03-17 12:07:00 +00:00
|
|
|
if (devsw->d_version != D_VERSION_01) {
|
2004-02-21 21:57:26 +00:00
|
|
|
printf(
|
|
|
|
"WARNING: Device driver \"%s\" has wrong version %s\n",
|
|
|
|
devsw->d_name, "and is disabled. Recompile KLD module.");
|
|
|
|
devsw->d_open = dead_open;
|
|
|
|
devsw->d_close = dead_close;
|
|
|
|
devsw->d_read = dead_read;
|
|
|
|
devsw->d_write = dead_write;
|
|
|
|
devsw->d_ioctl = dead_ioctl;
|
|
|
|
devsw->d_poll = dead_poll;
|
|
|
|
devsw->d_mmap = dead_mmap;
|
|
|
|
devsw->d_strategy = dead_strategy;
|
|
|
|
devsw->d_dump = dead_dump;
|
|
|
|
devsw->d_kqfilter = dead_kqfilter;
|
|
|
|
}
|
|
|
|
|
2004-02-21 20:41:11 +00:00
|
|
|
if (devsw->d_flags & D_TTY) {
|
2004-06-01 13:39:02 +00:00
|
|
|
if (devsw->d_ioctl == NULL) devsw->d_ioctl = ttyioctl;
|
2004-02-21 20:41:11 +00:00
|
|
|
if (devsw->d_read == NULL) devsw->d_read = ttyread;
|
|
|
|
if (devsw->d_write == NULL) devsw->d_write = ttywrite;
|
|
|
|
if (devsw->d_kqfilter == NULL) devsw->d_kqfilter = ttykqfilter;
|
|
|
|
if (devsw->d_poll == NULL) devsw->d_poll = ttypoll;
|
|
|
|
}
|
|
|
|
|
2003-09-27 12:53:33 +00:00
|
|
|
if (devsw->d_open == NULL) devsw->d_open = null_open;
|
|
|
|
if (devsw->d_close == NULL) devsw->d_close = null_close;
|
|
|
|
if (devsw->d_read == NULL) devsw->d_read = no_read;
|
|
|
|
if (devsw->d_write == NULL) devsw->d_write = no_write;
|
|
|
|
if (devsw->d_ioctl == NULL) devsw->d_ioctl = no_ioctl;
|
|
|
|
if (devsw->d_poll == NULL) devsw->d_poll = no_poll;
|
|
|
|
if (devsw->d_mmap == NULL) devsw->d_mmap = no_mmap;
|
|
|
|
if (devsw->d_strategy == NULL) devsw->d_strategy = no_strategy;
|
|
|
|
if (devsw->d_dump == NULL) devsw->d_dump = no_dump;
|
|
|
|
if (devsw->d_kqfilter == NULL) devsw->d_kqfilter = no_kqfilter;
|
2004-02-21 21:57:26 +00:00
|
|
|
|
|
|
|
LIST_INIT(&devsw->d_devs);
|
|
|
|
|
|
|
|
devsw->d_flags |= D_INIT;
|
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_unlock();
|
2004-02-15 10:35:33 +00:00
|
|
|
}
|
|
|
|
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
static struct cdev *
|
|
|
|
make_dev_credv(struct cdevsw *devsw, int minornr, struct ucred *cr, uid_t uid,
|
|
|
|
gid_t gid, int mode, const char *fmt, va_list ap)
|
2004-02-15 10:35:33 +00:00
|
|
|
{
|
2004-06-16 09:47:26 +00:00
|
|
|
struct cdev *dev;
|
2004-02-15 10:35:33 +00:00
|
|
|
int i;
|
|
|
|
|
2005-01-29 16:50:04 +00:00
|
|
|
KASSERT((minornr & ~MAXMINOR) == 0,
|
2004-02-21 21:57:26 +00:00
|
|
|
("Invalid minor (0x%x) in make_dev", minornr));
|
|
|
|
|
2005-03-31 10:29:57 +00:00
|
|
|
if (!(devsw->d_flags & D_INIT))
|
2004-02-21 21:57:26 +00:00
|
|
|
prep_cdevsw(devsw);
|
2005-01-24 12:44:56 +00:00
|
|
|
dev = allocdev();
|
|
|
|
dev_lock();
|
2005-03-29 09:56:21 +00:00
|
|
|
dev = newdev(devsw, minornr, dev);
|
2003-09-27 21:50:00 +00:00
|
|
|
if (dev->si_flags & SI_CHEAPCLONE &&
|
|
|
|
dev->si_flags & SI_NAMED &&
|
|
|
|
dev->si_devsw == devsw) {
|
|
|
|
/*
|
|
|
|
* This is allowed as it removes races and generally
|
|
|
|
* simplifies cloning devices.
|
2004-02-21 21:57:26 +00:00
|
|
|
* XXX: still ??
|
2003-09-27 21:50:00 +00:00
|
|
|
*/
|
2005-01-24 12:44:56 +00:00
|
|
|
dev_unlock();
|
2003-09-27 21:50:00 +00:00
|
|
|
return (dev);
|
|
|
|
}
|
2004-02-21 21:57:26 +00:00
|
|
|
KASSERT(!(dev->si_flags & SI_NAMED),
|
2005-03-29 09:56:21 +00:00
|
|
|
("make_dev() by driver %s on pre-existing device (min=%x, name=%s)",
|
|
|
|
devsw->d_name, minor(dev), devtoname(dev)));
|
2004-02-21 21:57:26 +00:00
|
|
|
|
2003-02-04 11:04:26 +00:00
|
|
|
i = vsnrprintf(dev->__si_namebuf, sizeof dev->__si_namebuf, 32, fmt, ap);
|
|
|
|
if (i > (sizeof dev->__si_namebuf - 1)) {
|
2004-08-30 01:10:20 +00:00
|
|
|
printf("WARNING: Device name truncated! (%s)\n",
|
2003-02-04 11:04:26 +00:00
|
|
|
dev->__si_namebuf);
|
|
|
|
}
|
2004-10-25 13:12:06 +00:00
|
|
|
|
1999-08-08 18:43:05 +00:00
|
|
|
dev->si_devsw = devsw;
|
2000-09-11 17:15:33 +00:00
|
|
|
dev->si_flags |= SI_NAMED;
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
if (cr != NULL)
|
|
|
|
dev->si_cred = crhold(cr);
|
|
|
|
else
|
|
|
|
dev->si_cred = NULL;
|
2005-03-31 10:29:57 +00:00
|
|
|
dev->si_uid = uid;
|
|
|
|
dev->si_gid = gid;
|
|
|
|
dev->si_mode = mode;
|
2000-08-20 21:34:39 +00:00
|
|
|
|
2003-03-02 13:35:30 +00:00
|
|
|
devfs_create(dev);
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_unlock();
|
2000-08-20 21:34:39 +00:00
|
|
|
return (dev);
|
|
|
|
}
|
|
|
|
|
When devfs cloning takes place, provide access to the credential of the
process that caused the clone event to take place for the device driver
creating the device. This allows cloned device drivers to adapt the
device node based on security aspects of the process, such as the uid,
gid, and MAC label.
- Add a cred reference to struct cdev, so that when a device node is
instantiated as a vnode, the cloning credential can be exposed to
MAC.
- Add make_dev_cred(), a version of make_dev() that additionally
accepts the credential to stick in the struct cdev. Implement it and
make_dev() in terms of a back-end make_dev_credv().
- Add a new event handler, dev_clone_cred, which can be registered to
receive the credential instead of dev_clone, if desired.
- Modify the MAC entry point mac_create_devfs_device() to accept an
optional credential pointer (may be NULL), so that MAC policies can
inspect and act on the label or other elements of the credential
when initializing the skeleton device protections.
- Modify tty_pty.c to register clone_dev_cred and invoke make_dev_cred(),
so that the pty clone credential is exposed to the MAC Framework.
While currently primarily focussed on MAC policies, this change is also
a prerequisite for changes to allow ptys to be instantiated with the UID
of the process looking up the pty. This requires further changes to the
pty driver -- in particular, to immediately recycle pty nodes on last
close so that the credential-related state can be recreated on next
lookup.
Submitted by: Andrew Reisse <andrew.reisse@sparta.com>
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
MFC after: 1 week
MFC note: Merge to 6.x, but not 5.x for ABI reasons
2005-07-14 10:22:09 +00:00
|
|
|
struct cdev *
|
|
|
|
make_dev(struct cdevsw *devsw, int minornr, uid_t uid, gid_t gid, int mode,
|
|
|
|
const char *fmt, ...)
|
|
|
|
{
|
|
|
|
struct cdev *dev;
|
|
|
|
va_list ap;
|
|
|
|
|
|
|
|
va_start(ap, fmt);
|
|
|
|
dev = make_dev_credv(devsw, minornr, NULL, uid, gid, mode, fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
return (dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct cdev *
|
|
|
|
make_dev_cred(struct cdevsw *devsw, int minornr, struct ucred *cr, uid_t uid,
|
|
|
|
gid_t gid, int mode, const char *fmt, ...)
|
|
|
|
{
|
|
|
|
struct cdev *dev;
|
|
|
|
va_list ap;
|
|
|
|
|
|
|
|
va_start(ap, fmt);
|
|
|
|
dev = make_dev_credv(devsw, minornr, cr, uid, gid, mode, fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
|
|
|
|
return (dev);
|
|
|
|
}
|
|
|
|
|
2001-10-17 18:47:12 +00:00
|
|
|
int
|
2004-06-16 09:47:26 +00:00
|
|
|
dev_named(struct cdev *pdev, const char *name)
|
2001-10-17 18:47:12 +00:00
|
|
|
{
|
2004-06-16 09:47:26 +00:00
|
|
|
struct cdev *cdev;
|
2001-10-17 18:47:12 +00:00
|
|
|
|
|
|
|
if (strcmp(devtoname(pdev), name) == 0)
|
|
|
|
return (1);
|
|
|
|
LIST_FOREACH(cdev, &pdev->si_children, si_siblings)
|
|
|
|
if (strcmp(devtoname(cdev), name) == 0)
|
|
|
|
return (1);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2001-05-26 08:27:58 +00:00
|
|
|
void
|
2004-06-16 09:47:26 +00:00
|
|
|
dev_depends(struct cdev *pdev, struct cdev *cdev)
|
2001-05-26 08:27:58 +00:00
|
|
|
{
|
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_lock();
|
2001-05-26 08:27:58 +00:00
|
|
|
cdev->si_parent = pdev;
|
|
|
|
cdev->si_flags |= SI_CHILD;
|
|
|
|
LIST_INSERT_HEAD(&pdev->si_children, cdev, si_siblings);
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_unlock();
|
2001-05-26 08:27:58 +00:00
|
|
|
}
|
|
|
|
|
2004-06-16 09:47:26 +00:00
|
|
|
struct cdev *
|
|
|
|
make_dev_alias(struct cdev *pdev, const char *fmt, ...)
|
2000-08-20 21:34:39 +00:00
|
|
|
{
|
2004-06-16 09:47:26 +00:00
|
|
|
struct cdev *dev;
|
2000-08-20 21:34:39 +00:00
|
|
|
va_list ap;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
dev = allocdev();
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_lock();
|
2000-08-20 21:34:39 +00:00
|
|
|
dev->si_flags |= SI_ALIAS;
|
2000-09-11 17:15:33 +00:00
|
|
|
dev->si_flags |= SI_NAMED;
|
2000-08-20 21:34:39 +00:00
|
|
|
va_start(ap, fmt);
|
2003-02-04 11:04:26 +00:00
|
|
|
i = vsnrprintf(dev->__si_namebuf, sizeof dev->__si_namebuf, 32, fmt, ap);
|
|
|
|
if (i > (sizeof dev->__si_namebuf - 1)) {
|
2004-08-30 01:10:20 +00:00
|
|
|
printf("WARNING: Device name truncated! (%s)\n",
|
2003-02-04 11:04:26 +00:00
|
|
|
dev->__si_namebuf);
|
|
|
|
}
|
2000-08-20 21:34:39 +00:00
|
|
|
va_end(ap);
|
1999-08-20 20:25:00 +00:00
|
|
|
|
2003-03-02 13:35:30 +00:00
|
|
|
devfs_create(dev);
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_unlock();
|
2004-02-21 21:57:26 +00:00
|
|
|
dev_depends(pdev, dev);
|
1999-08-08 18:43:05 +00:00
|
|
|
return (dev);
|
|
|
|
}
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
static void
|
2005-02-22 15:51:07 +00:00
|
|
|
destroy_devl(struct cdev *dev)
|
1999-08-29 09:09:12 +00:00
|
|
|
{
|
2004-09-27 06:18:25 +00:00
|
|
|
struct cdevsw *csw;
|
|
|
|
|
2005-02-22 15:51:07 +00:00
|
|
|
mtx_assert(&devmtx, MA_OWNED);
|
2004-09-27 06:18:25 +00:00
|
|
|
KASSERT(dev->si_flags & SI_NAMED,
|
2005-03-29 09:56:21 +00:00
|
|
|
("WARNING: Driver mistake: destroy_dev on %d\n", minor(dev)));
|
2000-09-11 17:15:33 +00:00
|
|
|
|
2003-03-02 13:35:30 +00:00
|
|
|
devfs_destroy(dev);
|
2004-02-21 21:57:26 +00:00
|
|
|
|
|
|
|
/* Remove name marking */
|
2004-02-21 20:29:52 +00:00
|
|
|
dev->si_flags &= ~SI_NAMED;
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
/* If we are a child, remove us from the parents list */
|
2001-05-26 08:27:58 +00:00
|
|
|
if (dev->si_flags & SI_CHILD) {
|
|
|
|
LIST_REMOVE(dev, si_siblings);
|
|
|
|
dev->si_flags &= ~SI_CHILD;
|
|
|
|
}
|
2004-02-21 21:57:26 +00:00
|
|
|
|
|
|
|
/* Kill our children */
|
2001-05-26 08:27:58 +00:00
|
|
|
while (!LIST_EMPTY(&dev->si_children))
|
2005-02-22 15:51:07 +00:00
|
|
|
destroy_devl(LIST_FIRST(&dev->si_children));
|
2004-02-21 21:57:26 +00:00
|
|
|
|
|
|
|
/* Remove from clone list */
|
2004-02-21 20:29:52 +00:00
|
|
|
if (dev->si_flags & SI_CLONELIST) {
|
|
|
|
LIST_REMOVE(dev, si_clone);
|
|
|
|
dev->si_flags &= ~SI_CLONELIST;
|
|
|
|
}
|
2004-02-21 21:57:26 +00:00
|
|
|
|
2004-09-27 06:18:25 +00:00
|
|
|
csw = dev->si_devsw;
|
2004-09-29 16:38:38 +00:00
|
|
|
dev->si_devsw = NULL; /* already NULL for SI_ALIAS */
|
|
|
|
while (csw != NULL && csw->d_purge != NULL && dev->si_threadcount) {
|
2004-09-27 06:18:25 +00:00
|
|
|
printf("Purging %lu threads from %s\n",
|
|
|
|
dev->si_threadcount, devtoname(dev));
|
|
|
|
csw->d_purge(dev);
|
|
|
|
msleep(csw, &devmtx, PRIBIO, "devprg", hz/10);
|
|
|
|
}
|
2004-09-29 16:38:38 +00:00
|
|
|
if (csw != NULL && csw->d_purge != NULL)
|
2004-09-27 06:34:30 +00:00
|
|
|
printf("All threads purged from %s\n", devtoname(dev));
|
2004-09-27 06:18:25 +00:00
|
|
|
|
|
|
|
dev->si_drv1 = 0;
|
|
|
|
dev->si_drv2 = 0;
|
|
|
|
bzero(&dev->__si_u, sizeof(dev->__si_u));
|
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
if (!(dev->si_flags & SI_ALIAS)) {
|
|
|
|
/* Remove from cdevsw list */
|
|
|
|
LIST_REMOVE(dev, si_list);
|
|
|
|
|
2004-06-16 09:47:26 +00:00
|
|
|
/* If cdevsw has no struct cdev *'s, clean it */
|
2004-09-27 06:34:30 +00:00
|
|
|
if (LIST_EMPTY(&csw->d_devs))
|
|
|
|
fini_cdevsw(csw);
|
2004-02-21 21:57:26 +00:00
|
|
|
}
|
2000-09-11 17:15:33 +00:00
|
|
|
dev->si_flags &= ~SI_ALIAS;
|
2004-09-27 06:18:25 +00:00
|
|
|
|
2004-02-21 21:57:26 +00:00
|
|
|
if (dev->si_refcount > 0) {
|
|
|
|
LIST_INSERT_HEAD(&dead_cdevsw.d_devs, dev, si_list);
|
|
|
|
} else {
|
|
|
|
freedev(dev);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2004-06-16 09:47:26 +00:00
|
|
|
destroy_dev(struct cdev *dev)
|
2004-02-21 21:57:26 +00:00
|
|
|
{
|
|
|
|
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_lock();
|
2005-02-22 15:51:07 +00:00
|
|
|
destroy_devl(dev);
|
2004-09-23 07:17:41 +00:00
|
|
|
dev_unlock();
|
1999-08-29 09:09:12 +00:00
|
|
|
}
|
|
|
|
|
1999-09-13 12:29:32 +00:00
|
|
|
const char *
|
2004-06-16 09:47:26 +00:00
|
|
|
devtoname(struct cdev *dev)
|
1999-08-17 20:25:50 +00:00
|
|
|
{
|
1999-08-29 09:09:12 +00:00
|
|
|
char *p;
|
2004-09-24 06:29:23 +00:00
|
|
|
struct cdevsw *csw;
|
1999-09-13 12:29:32 +00:00
|
|
|
int mynor;
|
1999-08-29 09:09:12 +00:00
|
|
|
|
|
|
|
if (dev->si_name[0] == '#' || dev->si_name[0] == '\0') {
|
|
|
|
p = dev->si_name;
|
2004-09-24 06:29:23 +00:00
|
|
|
csw = dev_refthread(dev);
|
|
|
|
if (csw != NULL) {
|
|
|
|
sprintf(p, "(%s)", csw->d_name);
|
|
|
|
dev_relthread(dev);
|
|
|
|
}
|
1999-08-29 09:09:12 +00:00
|
|
|
p += strlen(p);
|
1999-09-13 12:29:32 +00:00
|
|
|
mynor = minor(dev);
|
|
|
|
if (mynor < 0 || mynor > 255)
|
2004-09-24 06:29:23 +00:00
|
|
|
sprintf(p, "/%#x", (u_int)mynor);
|
1999-09-13 12:29:32 +00:00
|
|
|
else
|
2004-09-24 06:29:23 +00:00
|
|
|
sprintf(p, "/%d", mynor);
|
1999-08-29 09:09:12 +00:00
|
|
|
}
|
1999-08-17 20:25:50 +00:00
|
|
|
return (dev->si_name);
|
|
|
|
}
|
2000-09-02 19:17:34 +00:00
|
|
|
|
|
|
|
int
|
2002-03-10 10:50:05 +00:00
|
|
|
dev_stdclone(char *name, char **namep, const char *stem, int *unit)
|
2000-09-02 19:17:34 +00:00
|
|
|
{
|
|
|
|
int u, i;
|
|
|
|
|
|
|
|
i = strlen(stem);
|
2001-04-14 21:33:58 +00:00
|
|
|
if (bcmp(stem, name, i) != 0)
|
|
|
|
return (0);
|
2000-09-02 19:17:34 +00:00
|
|
|
if (!isdigit(name[i]))
|
|
|
|
return (0);
|
|
|
|
u = 0;
|
2001-11-16 17:05:07 +00:00
|
|
|
if (name[i] == '0' && isdigit(name[i+1]))
|
|
|
|
return (0);
|
2000-09-02 19:17:34 +00:00
|
|
|
while (isdigit(name[i])) {
|
|
|
|
u *= 10;
|
|
|
|
u += name[i++] - '0';
|
|
|
|
}
|
2002-10-05 17:10:28 +00:00
|
|
|
if (u > 0xffffff)
|
|
|
|
return (0);
|
2000-09-02 19:17:34 +00:00
|
|
|
*unit = u;
|
|
|
|
if (namep)
|
|
|
|
*namep = &name[i];
|
|
|
|
if (name[i])
|
|
|
|
return (2);
|
|
|
|
return (1);
|
|
|
|
}
|
2000-09-09 11:39:59 +00:00
|
|
|
|
2004-02-21 20:29:52 +00:00
|
|
|
/*
|
|
|
|
* Helper functions for cloning device drivers.
|
|
|
|
*
|
|
|
|
* The objective here is to make it unnecessary for the device drivers to
|
|
|
|
* use rman or similar to manage their unit number space. Due to the way
|
|
|
|
* we do "on-demand" devices, using rman or other "private" methods
|
|
|
|
* will be very tricky to lock down properly once we lock down this file.
|
|
|
|
*
|
2004-06-22 20:22:24 +00:00
|
|
|
* Instead we give the drivers these routines which puts the struct cdev *'s
|
|
|
|
* that are to be managed on their own list, and gives the driver the ability
|
2004-02-21 20:29:52 +00:00
|
|
|
* to ask for the first free unit number or a given specified unit number.
|
|
|
|
*
|
|
|
|
* In addition these routines support paired devices (pty, nmdm and similar)
|
|
|
|
* by respecting a number of "flag" bits in the minor number.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct clonedevs {
|
|
|
|
LIST_HEAD(,cdev) head;
|
|
|
|
};
|
|
|
|
|
2004-03-11 12:58:55 +00:00
|
|
|
void
|
|
|
|
clone_setup(struct clonedevs **cdp)
|
|
|
|
{
|
|
|
|
|
|
|
|
*cdp = malloc(sizeof **cdp, M_DEVBUF, M_WAITOK | M_ZERO);
|
|
|
|
LIST_INIT(&(*cdp)->head);
|
|
|
|
}
|
|
|
|
|
2004-02-21 20:29:52 +00:00
|
|
|
int
|
2004-06-16 09:47:26 +00:00
|
|
|
clone_create(struct clonedevs **cdp, struct cdevsw *csw, int *up, struct cdev **dp, u_int extra)
|
2004-02-21 20:29:52 +00:00
|
|
|
{
|
|
|
|
struct clonedevs *cd;
|
2005-01-24 12:44:56 +00:00
|
|
|
struct cdev *dev, *ndev, *dl, *de;
|
2004-02-21 20:29:52 +00:00
|
|
|
int unit, low, u;
|
|
|
|
|
2004-03-11 12:58:55 +00:00
|
|
|
KASSERT(*cdp != NULL,
|
|
|
|
("clone_setup() not called in driver \"%s\"", csw->d_name));
|
2004-02-21 20:29:52 +00:00
|
|
|
KASSERT(!(extra & CLONE_UNITMASK),
|
2004-03-11 12:58:55 +00:00
|
|
|
("Illegal extra bits (0x%x) in clone_create", extra));
|
2004-02-21 20:29:52 +00:00
|
|
|
KASSERT(*up <= CLONE_UNITMASK,
|
2004-03-11 12:58:55 +00:00
|
|
|
("Too high unit (0x%x) in clone_create", *up));
|
2004-02-21 20:29:52 +00:00
|
|
|
|
2005-02-27 22:57:32 +00:00
|
|
|
if (!(csw->d_flags & D_INIT))
|
|
|
|
prep_cdevsw(csw);
|
2004-02-21 20:29:52 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Search the list for a lot of things in one go:
|
|
|
|
* A preexisting match is returned immediately.
|
|
|
|
* The lowest free unit number if we are passed -1, and the place
|
|
|
|
* in the list where we should insert that new element.
|
|
|
|
* The place to insert a specified unit number, if applicable
|
|
|
|
* the end of the list.
|
|
|
|
*/
|
|
|
|
unit = *up;
|
2005-01-24 12:44:56 +00:00
|
|
|
ndev = allocdev();
|
|
|
|
dev_lock();
|
2004-03-11 14:11:02 +00:00
|
|
|
low = extra;
|
2004-02-21 20:29:52 +00:00
|
|
|
de = dl = NULL;
|
2004-03-11 12:58:55 +00:00
|
|
|
cd = *cdp;
|
2004-02-21 20:29:52 +00:00
|
|
|
LIST_FOREACH(dev, &cd->head, si_clone) {
|
2005-01-24 12:44:56 +00:00
|
|
|
KASSERT(dev->si_flags & SI_CLONELIST,
|
|
|
|
("Dev %p(%s) should be on clonelist", dev, dev->si_name));
|
2004-02-21 20:29:52 +00:00
|
|
|
u = dev2unit(dev);
|
|
|
|
if (u == (unit | extra)) {
|
|
|
|
*dp = dev;
|
2005-01-24 12:44:56 +00:00
|
|
|
freedev(ndev);
|
|
|
|
dev_unlock();
|
2004-02-21 20:29:52 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
if (unit == -1 && u == low) {
|
|
|
|
low++;
|
|
|
|
de = dev;
|
|
|
|
continue;
|
|
|
|
}
|
2004-03-11 14:11:02 +00:00
|
|
|
if (u > (unit | extra)) {
|
2004-02-21 20:29:52 +00:00
|
|
|
dl = dev;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (unit == -1)
|
2004-03-11 14:11:02 +00:00
|
|
|
unit = low & CLONE_UNITMASK;
|
2005-03-29 09:56:21 +00:00
|
|
|
dev = newdev(csw, unit2minor(unit | extra), ndev);
|
2005-01-24 12:44:56 +00:00
|
|
|
if (dev->si_flags & SI_CLONELIST) {
|
|
|
|
printf("dev %p (%s) is on clonelist\n", dev, dev->si_name);
|
|
|
|
printf("unit=%d\n", unit);
|
|
|
|
LIST_FOREACH(dev, &cd->head, si_clone) {
|
|
|
|
printf("\t%p %s\n", dev, dev->si_name);
|
|
|
|
}
|
|
|
|
panic("foo");
|
|
|
|
}
|
2004-02-21 20:29:52 +00:00
|
|
|
KASSERT(!(dev->si_flags & SI_CLONELIST),
|
2005-01-24 12:44:56 +00:00
|
|
|
("Dev %p(%s) should not be on clonelist", dev, dev->si_name));
|
2004-02-21 20:29:52 +00:00
|
|
|
if (dl != NULL)
|
|
|
|
LIST_INSERT_BEFORE(dl, dev, si_clone);
|
|
|
|
else if (de != NULL)
|
|
|
|
LIST_INSERT_AFTER(de, dev, si_clone);
|
|
|
|
else
|
|
|
|
LIST_INSERT_HEAD(&cd->head, dev, si_clone);
|
|
|
|
dev->si_flags |= SI_CLONELIST;
|
|
|
|
*up = unit;
|
2005-01-24 12:44:56 +00:00
|
|
|
dev_unlock();
|
2004-02-21 20:29:52 +00:00
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Kill everything still on the list. The driver should already have
|
2004-06-16 09:47:26 +00:00
|
|
|
* disposed of any softc hung of the struct cdev *'s at this time.
|
2004-02-21 20:29:52 +00:00
|
|
|
*/
|
|
|
|
void
|
|
|
|
clone_cleanup(struct clonedevs **cdp)
|
|
|
|
{
|
2004-06-16 09:47:26 +00:00
|
|
|
struct cdev *dev, *tdev;
|
2004-02-21 20:29:52 +00:00
|
|
|
struct clonedevs *cd;
|
|
|
|
|
|
|
|
cd = *cdp;
|
|
|
|
if (cd == NULL)
|
|
|
|
return;
|
2005-01-24 12:44:56 +00:00
|
|
|
dev_lock();
|
2004-02-21 20:29:52 +00:00
|
|
|
LIST_FOREACH_SAFE(dev, &cd->head, si_clone, tdev) {
|
2005-01-24 12:44:56 +00:00
|
|
|
KASSERT(dev->si_flags & SI_CLONELIST,
|
|
|
|
("Dev %p(%s) should be on clonelist", dev, dev->si_name));
|
2004-02-21 20:29:52 +00:00
|
|
|
KASSERT(dev->si_flags & SI_NAMED,
|
2005-03-15 11:33:28 +00:00
|
|
|
("Driver has goofed in cloning underways udev %x", dev->si_drv0));
|
2005-02-22 15:51:07 +00:00
|
|
|
destroy_devl(dev);
|
2004-02-21 20:29:52 +00:00
|
|
|
}
|
2005-01-24 12:44:56 +00:00
|
|
|
dev_unlock();
|
2004-02-21 20:29:52 +00:00
|
|
|
free(cd, M_DEVBUF);
|
|
|
|
*cdp = NULL;
|
|
|
|
}
|