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/*-
* 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 "opt_geom.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/bio.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <machine/md_var.h>
#include <sys/ctype.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <geom/geom.h>
static g_access_t g_disk_access;
struct g_class g_disk_class = {
"DISK-class",
NULL,
NULL,
G_CLASS_INITSTUFF
};
static int
g_disk_access(struct g_provider *pp, int r, int w, int e)
{
struct disk *dp;
dev_t dev;
int error;
g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
pp->name, r, w, e);
g_topology_assert();
r += pp->acr;
w += pp->acw;
e += pp->ace;
dp = pp->geom->softc;
dev = dp->d_dev;
if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
mtx_lock(&Giant);
error = devsw(dev)->d_open(dev, 3, 0, NULL);
if (error != 0)
printf("Opened disk %s -> %d\n", pp->name, error);
mtx_unlock(&Giant);
} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
mtx_lock(&Giant);
error = devsw(dev)->d_close(dev, 3, 0, NULL);
if (error != 0)
printf("Closed disk %s -> %d\n", pp->name, error);
mtx_unlock(&Giant);
} else {
error = 0;
}
pp->mediasize =
dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit;
return (error);
}
static void
g_disk_kerneldump(struct bio *bp, struct disk *dp)
{
int error;
struct g_kerneldump *gkd;
struct dumperinfo di;
gkd = (struct g_kerneldump*)bp->bio_data;
printf("Kerneldump off=%lld len=%lld\n", gkd->offset, gkd->length);
di.dumper = (dumper_t *)dp->d_devsw->d_dump;
di.priv = dp->d_dev;
di.blocksize = dp->d_label.d_secsize;
di.mediaoffset = gkd->offset;
di.mediasize = gkd->length;
error = set_dumper(&di);
g_io_fail(bp, error);
}
static void
g_disk_done(struct bio *bp)
{
mtx_unlock(&Giant);
bp->bio_completed = bp->bio_length - bp->bio_resid;
g_std_done(bp);
mtx_lock(&Giant);
}
static void
g_disk_start(struct bio *bp)
{
struct bio *bp2;
dev_t dev;
struct disk *dp;
struct g_ioctl *gio;
int error;
dp = bp->bio_to->geom->softc;
dev = dp->d_dev;
error = 0;
switch(bp->bio_cmd) {
case BIO_READ:
case BIO_WRITE:
bp2 = g_clone_bio(bp);
bp2->bio_done = g_disk_done;
bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
bp2->bio_pblkno = bp2->bio_blkno;
bp2->bio_bcount = bp2->bio_length;
bp2->bio_dev = dev;
mtx_lock(&Giant);
devsw(dev)->d_strategy(bp2);
mtx_unlock(&Giant);
break;
case BIO_GETATTR:
if (g_haveattr_int(bp, "GEOM::sectorsize",
dp->d_label.d_secsize))
break;
else if (g_haveattr_int(bp, "GEOM::fwsectors",
dp->d_label.d_nsectors))
break;
else if (g_haveattr_int(bp, "GEOM::fwheads",
dp->d_label.d_ntracks))
break;
else if (g_haveattr_off_t(bp, "GEOM::mediasize",
dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit))
break;
else if (g_haveattr_off_t(bp, "GEOM::frontstuff", 0))
break;
else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
g_disk_kerneldump(bp, dp);
else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
bp->bio_length == sizeof *gio) {
gio = (struct g_ioctl *)bp->bio_data;
mtx_lock(&Giant);
error = devsw(dev)->d_ioctl(dev, gio->cmd,
gio->data, gio->fflag, gio->td);
mtx_unlock(&Giant);
} else
error = ENOIOCTL;
break;
default:
error = EOPNOTSUPP;
break;
}
if (error) {
bp->bio_error = error;
g_io_deliver(bp);
}
return;
}
dev_t
disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
{
static int once;
struct g_geom *gp;
struct g_provider *pp;
dev_t dev;
mtx_unlock(&Giant);
if (!once) {
g_add_class(&g_disk_class);
once++;
}
dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
dp->d_dev = dev;
dp->d_devsw = cdevsw;
dev->si_devsw = cdevsw;
dev->si_disk = dp;
dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
g_topology_lock();
gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit);
gp->start = g_disk_start;
gp->access = g_disk_access;
gp->softc = dp;
dp->d_softc = gp;
pp = g_new_providerf(gp, "%s", gp->name);
g_error_provider(pp, 0);
g_topology_unlock();
mtx_lock(&Giant);
return (dev);
}
void disk_dev_synth(dev_t dev);
void
disk_dev_synth(dev_t dev)
{
return;
}
void
disk_destroy(dev_t dev)
{
struct disk *dp;
struct g_geom *gp;
dp = dev->si_disk;
gp = dp->d_softc;
g_free(dev);
gp->flags |= G_GEOM_WITHER;
g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
}
void
disk_invalidate (struct disk *disk)
{
}
SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD,
0, sizeof(struct disklabel), "sizeof(struct disklabel)");
SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD,
0, sizeof(struct diskslices), "sizeof(struct diskslices)");
SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD,
0, sizeof(struct disk), "sizeof(struct disk)");
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