391 lines
9.6 KiB
C
391 lines
9.6 KiB
C
/*-
|
|
* Copyright (c) 2002 Poul-Henning Kamp
|
|
* Copyright (c) 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
|
|
* and NAI Labs, the Security Research Division of Network Associates, Inc.
|
|
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
|
* DARPA CHATS research program.
|
|
*
|
|
* 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. The names of the authors 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 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/time.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/fcntl.h>
|
|
#include <geom/geom.h>
|
|
|
|
#define CDEV_MAJOR 4
|
|
|
|
static d_open_t g_dev_open;
|
|
static d_close_t g_dev_close;
|
|
static d_strategy_t g_dev_strategy;
|
|
static d_ioctl_t g_dev_ioctl;
|
|
static d_psize_t g_dev_psize;
|
|
|
|
static struct cdevsw g_dev_cdevsw = {
|
|
/* open */ g_dev_open,
|
|
/* close */ g_dev_close,
|
|
/* read */ physread,
|
|
/* write */ physwrite,
|
|
/* ioctl */ g_dev_ioctl,
|
|
/* poll */ nopoll,
|
|
/* mmap */ nommap,
|
|
/* strategy */ g_dev_strategy,
|
|
/* name */ "g_dev",
|
|
/* maj */ CDEV_MAJOR,
|
|
/* dump */ nodump,
|
|
/* psize */ g_dev_psize,
|
|
/* flags */ D_DISK | D_CANFREE | D_TRACKCLOSE,
|
|
};
|
|
|
|
static g_taste_t g_dev_taste;
|
|
static g_orphan_t g_dev_orphan;
|
|
|
|
static struct g_class g_dev_class = {
|
|
"DEV-class",
|
|
g_dev_taste,
|
|
NULL,
|
|
G_CLASS_INITSTUFF
|
|
};
|
|
|
|
static void
|
|
g_dev_clone(void *arg, char *name, int namelen, dev_t *dev)
|
|
{
|
|
struct g_geom *gp;
|
|
|
|
if (*dev != NODEV)
|
|
return;
|
|
|
|
g_trace(G_T_TOPOLOGY, "g_dev_clone(%s)", name);
|
|
g_rattle();
|
|
|
|
/* XXX: can I drop Giant here ??? */
|
|
/* g_topology_lock(); */
|
|
LIST_FOREACH(gp, &g_dev_class.geom, geom) {
|
|
if (strcmp(gp->name, name))
|
|
continue;
|
|
*dev = gp->softc;
|
|
g_trace(G_T_TOPOLOGY, "g_dev_clone(%s) = %p", name, *dev);
|
|
return;
|
|
}
|
|
/* g_topology_unlock(); */
|
|
return;
|
|
}
|
|
|
|
static void
|
|
g_dev_register_cloner(void *foo __unused)
|
|
{
|
|
static int once;
|
|
|
|
if (!once) {
|
|
if (!once)
|
|
EVENTHANDLER_REGISTER(dev_clone, g_dev_clone, 0, 1000);
|
|
once++;
|
|
}
|
|
}
|
|
|
|
SYSINIT(geomdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE,g_dev_register_cloner,NULL);
|
|
|
|
static struct g_geom *
|
|
g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
static int unit;
|
|
u_int secsize;
|
|
off_t mediasize;
|
|
int error, j;
|
|
dev_t dev;
|
|
|
|
g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name);
|
|
g_topology_assert();
|
|
LIST_FOREACH(cp, &pp->consumers, consumers)
|
|
if (cp->geom->class == mp)
|
|
return (NULL);
|
|
gp = g_new_geomf(mp, pp->name);
|
|
gp->orphan = g_dev_orphan;
|
|
cp = g_new_consumer(gp);
|
|
g_attach(cp, pp);
|
|
error = g_access_rel(cp, 1, 0, 0);
|
|
g_topology_unlock();
|
|
if (!error) {
|
|
j = sizeof secsize;
|
|
error = g_io_getattr("GEOM::sectorsize", cp, &j, &secsize);
|
|
if (error) {
|
|
secsize = 512;
|
|
printf("g_dev_taste: error %d Sectors are %d bytes\n",
|
|
error, secsize);
|
|
}
|
|
j = sizeof mediasize;
|
|
error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize);
|
|
if (error) {
|
|
mediasize = 0;
|
|
printf("g_dev_taste: error %d Mediasize is %lld bytes\n",
|
|
error, (long long)mediasize);
|
|
}
|
|
g_topology_lock();
|
|
g_access_rel(cp, -1, 0, 0);
|
|
g_topology_unlock();
|
|
} else {
|
|
secsize = 512;
|
|
mediasize = 0;
|
|
}
|
|
mtx_lock(&Giant);
|
|
if (mediasize != 0)
|
|
printf("GEOM: \"%s\" %lld bytes in %lld sectors of %u bytes\n",
|
|
pp->name, (long long)mediasize,
|
|
(long long)mediasize / secsize, secsize);
|
|
else
|
|
printf("GEOM: \"%s\" (size unavailable)\n", pp->name);
|
|
dev = make_dev(&g_dev_cdevsw, unit++,
|
|
UID_ROOT, GID_WHEEL, 0600, gp->name);
|
|
gp->softc = dev;
|
|
dev->si_drv1 = gp;
|
|
dev->si_drv2 = cp;
|
|
mtx_unlock(&Giant);
|
|
g_topology_lock();
|
|
return (gp);
|
|
}
|
|
|
|
static int
|
|
g_dev_open(dev_t dev, int flags, int fmt, struct thread *td)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
int error, r, w, e;
|
|
|
|
gp = dev->si_drv1;
|
|
cp = dev->si_drv2;
|
|
if (gp == NULL || cp == NULL)
|
|
return(ENXIO);
|
|
g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)",
|
|
gp->name, flags, fmt, td);
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
g_silence();
|
|
r = flags & FREAD ? 1 : 0;
|
|
w = flags & FWRITE ? 1 : 0;
|
|
e = flags & O_EXCL ? 1 : 0;
|
|
error = g_access_rel(cp, r, w, e);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
g_rattle();
|
|
return(error);
|
|
}
|
|
|
|
static int
|
|
g_dev_close(dev_t dev, int flags, int fmt, struct thread *td)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
int error, r, w, e;
|
|
|
|
gp = dev->si_drv1;
|
|
cp = dev->si_drv2;
|
|
if (gp == NULL || cp == NULL)
|
|
return(ENXIO);
|
|
g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)",
|
|
gp->name, flags, fmt, td);
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
g_silence();
|
|
r = flags & FREAD ? -1 : 0;
|
|
w = flags & FWRITE ? -1 : 0;
|
|
e = flags & O_EXCL ? -1 : 0;
|
|
error = g_access_rel(cp, r, w, e);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
g_rattle();
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
g_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
int i, error;
|
|
struct g_ioctl *gio;
|
|
|
|
gp = dev->si_drv1;
|
|
cp = dev->si_drv2;
|
|
|
|
error = 0;
|
|
DROP_GIANT();
|
|
|
|
i = IOCPARM_LEN(cmd);
|
|
switch (cmd) {
|
|
case DIOCGSECTORSIZE:
|
|
error = g_io_getattr("GEOM::sectorsize", cp, &i, data);
|
|
break;
|
|
case DIOCGMEDIASIZE:
|
|
error = g_io_getattr("GEOM::mediasize", cp, &i, data);
|
|
break;
|
|
case DIOCGFWSECTORS:
|
|
error = g_io_getattr("GEOM::fwsectors", cp, &i, data);
|
|
break;
|
|
case DIOCGFWHEADS:
|
|
error = g_io_getattr("GEOM::fwheads", cp, &i, data);
|
|
break;
|
|
case DIOCGFRONTSTUFF:
|
|
error = g_io_getattr("GEOM::frontstuff", cp, &i, data);
|
|
break;
|
|
default:
|
|
gio = g_malloc(sizeof *gio, M_WAITOK);
|
|
gio->cmd = cmd;
|
|
gio->data = data;
|
|
gio->fflag = fflag;
|
|
gio->td = td;
|
|
i = sizeof *gio;
|
|
if (cmd & IOC_IN)
|
|
error = g_io_setattr("GEOM::ioctl", cp, i, gio);
|
|
else
|
|
error = g_io_getattr("GEOM::ioctl", cp, &i, gio);
|
|
g_free(gio);
|
|
break;
|
|
}
|
|
|
|
if (error != 0 && cmd == DIOCGDVIRGIN) {
|
|
g_topology_lock();
|
|
gp = g_create_geomf("BSD-class", cp->provider, NULL);
|
|
g_topology_unlock();
|
|
}
|
|
PICKUP_GIANT();
|
|
g_rattle();
|
|
if (error == ENOIOCTL) {
|
|
i = IOCGROUP(cmd);
|
|
printf("IOCTL(0x%lx) \"%s\"", cmd, gp->name);
|
|
if (i > ' ' && i <= '~')
|
|
printf(" '%c'", (int)IOCGROUP(cmd));
|
|
else
|
|
printf(" 0x%lx", IOCGROUP(cmd));
|
|
printf("/%ld ", cmd & 0xff);
|
|
if (cmd & IOC_IN)
|
|
printf("I");
|
|
if (cmd & IOC_OUT)
|
|
printf("O");
|
|
printf("(%ld) = ENOIOCTL\n", IOCPARM_LEN(cmd));
|
|
error = ENOTTY;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
g_dev_psize(dev_t dev)
|
|
{
|
|
struct g_consumer *cp;
|
|
int i, error;
|
|
off_t mediasize;
|
|
|
|
cp = dev->si_drv2;
|
|
|
|
i = sizeof mediasize;
|
|
error = g_io_getattr("GEOM::mediasize", cp, &i, &mediasize);
|
|
if (error)
|
|
return (-1);
|
|
return (mediasize >> DEV_BSHIFT);
|
|
}
|
|
|
|
static void
|
|
g_dev_done(struct bio *bp2)
|
|
{
|
|
struct bio *bp;
|
|
|
|
bp = bp2->bio_linkage;
|
|
bp->bio_error = bp2->bio_error;
|
|
if (bp->bio_error != 0) {
|
|
g_trace(G_T_BIO, "g_dev_done(%p) had error %d",
|
|
bp2, bp->bio_error);
|
|
bp->bio_flags |= BIO_ERROR;
|
|
} else {
|
|
g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %lld",
|
|
bp2, bp, bp->bio_resid, bp2->bio_completed);
|
|
}
|
|
bp->bio_resid = bp->bio_bcount - bp2->bio_completed;
|
|
g_destroy_bio(bp2);
|
|
mtx_lock(&Giant);
|
|
biodone(bp);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
static void
|
|
g_dev_strategy(struct bio *bp)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
struct bio *bp2;
|
|
dev_t dev;
|
|
|
|
dev = bp->bio_dev;
|
|
gp = dev->si_drv1;
|
|
cp = dev->si_drv2;
|
|
bp2 = g_clone_bio(bp);
|
|
bp2->bio_offset = (off_t)bp->bio_blkno << DEV_BSHIFT;
|
|
bp2->bio_length = (off_t)bp->bio_bcount;
|
|
bp2->bio_done = g_dev_done;
|
|
g_trace(G_T_BIO,
|
|
"g_dev_strategy(%p/%p) offset %lld length %lld data %p cmd %d",
|
|
bp, bp2, bp->bio_offset, bp2->bio_length, bp2->bio_data,
|
|
bp2->bio_cmd);
|
|
g_io_request(bp2, cp);
|
|
}
|
|
|
|
|
|
static void
|
|
g_dev_orphan(struct g_consumer *cp)
|
|
{
|
|
struct g_geom *gp;
|
|
dev_t dev;
|
|
|
|
gp = cp->geom;
|
|
g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, gp->name);
|
|
g_topology_assert();
|
|
if (cp->biocount > 0)
|
|
return;
|
|
dev = gp->softc;
|
|
destroy_dev(dev);
|
|
if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
|
|
g_access_rel(cp, -cp->acr, -cp->acw, -cp->ace);
|
|
g_dettach(cp);
|
|
g_destroy_consumer(cp);
|
|
g_destroy_geom(gp);
|
|
}
|
|
|
|
DECLARE_GEOM_CLASS(g_dev_class, g_dev)
|
|
|