/*-
*
* Copyright (c) 2002 Peter Grehan.
* 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.
*
* 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.
*
* $FreeBSD$
*/
/*
* GEOM module for Apple Partition Maps
* As described in 'Inside Macintosh Vol 3: About the SCSI Manager -
* The Structure of Block Devices"
*/
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sbuf.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#define APPLE_CLASS_NAME "APPLE"
#define NAPMPART 16 /* Max partitions */
struct apm_partition {
char am_sig[2];
u_int32_t am_mapcnt;
u_int32_t am_start;
u_int32_t am_partcnt;
char am_name[32];
char am_type[32];
};
struct g_apple_softc {
u_int16_t dd_bsiz;
u_int32_t dd_blkcnt;
u_int16_t dd_drvrcnt;
u_int32_t am_mapcnt0;
struct apm_partition apmpart[NAPMPART];
};
static void
g_dec_drvrdesc(u_char *ptr, struct g_apple_softc *sc)
{
sc->dd_bsiz = be16dec(ptr + 2);
sc->dd_blkcnt = be32dec(ptr + 4);
sc->dd_drvrcnt = be32dec(ptr + 16);
}
static void
g_dec_apple_partition(u_char *ptr, struct apm_partition *d)
{
d->am_sig[0] = ptr[0];
d->am_sig[1] = ptr[1];
d->am_mapcnt = be32dec(ptr + 4);
d->am_start = be32dec(ptr + 8);
d->am_partcnt = be32dec(ptr + 12);
memcpy(d->am_name, ptr + 16, 32);
memcpy(d->am_type, ptr + 48, 32);
}
static int
g_apple_start(struct bio *bp)
{
struct g_provider *pp;
struct g_geom *gp;
struct g_apm_softc *mp;
struct g_slicer *gsp;
pp = bp->bio_to;
gp = pp->geom;
gsp = gp->softc;
mp = gsp->softc;
if (bp->bio_cmd == BIO_GETATTR) {
if (g_handleattr_off_t(bp, "APM::offset",
gsp->slices[pp->index].offset))
return (1);
}
return (0);
}
static void
g_apple_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp __unused, struct g_provider *pp)
{
struct g_apple_softc *mp;
struct g_slicer *gsp;
gsp = gp->softc;
mp = gsp->softc;
g_slice_dumpconf(sb, indent, gp, cp, pp);
if (pp != NULL) {
if (indent == NULL)
sbuf_printf(sb, " n %s ty %s",
mp->apmpart[pp->index].am_name,
mp->apmpart[pp->index].am_type);
else {
sbuf_printf(sb, "%s<name>%s</name>\n", indent,
mp->apmpart[pp->index].am_name);
sbuf_printf(sb, "%s<type>%s</type>\n", indent,
mp->apmpart[pp->index].am_type);
}
}
}
#if 0
static void
g_apple_print()
{
/* XXX */
}
#endif
static struct g_geom *
g_apple_taste(struct g_class *mp, struct g_provider *pp, int insist)
{
struct g_geom *gp;
struct g_consumer *cp;
int error, i, npart;
struct g_apple_softc *ms;
struct g_slicer *gsp;
struct apm_partition *apm;
u_int sectorsize;
u_char *buf;
g_trace(G_T_TOPOLOGY, "apple_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
gp = g_slice_new(mp, NAPMPART, pp, &cp, &ms, sizeof *ms, g_apple_start);
if (gp == NULL)
return (NULL);
gsp = gp->softc;
g_topology_unlock();
gp->dumpconf = g_apple_dumpconf;
npart = 0;
do {
if (gp->rank != 2 && insist == 0)
break;
sectorsize = cp->provider->sectorsize;
if (sectorsize != 512)
break;
buf = g_read_data(cp, 0, sectorsize, &error);
if (buf == NULL || error != 0)
break;
/*
* Test for the sector 0 driver record signature, and
* validate sector and disk size
*/
if (buf[0] != 'E' && buf[1] != 'R') {
g_free(buf);
break;
}
g_dec_drvrdesc(buf, ms);
g_free(buf);
if (ms->dd_bsiz != 512) {
break;
}
/*
* Read in the first partition map
*/
buf = g_read_data(cp, sectorsize, sectorsize, &error);
if (buf == NULL || error != 0)
break;
/*
* Decode the first partition: it's another indication of
* validity, as well as giving the size of the partition
* map
*/
apm = &ms->apmpart[0];
g_dec_apple_partition(buf, apm);
g_free(buf);
if (apm->am_sig[0] != 'P' || apm->am_sig[1] != 'M')
break;
ms->am_mapcnt0 = apm->am_mapcnt;
buf = g_read_data(cp, 2 * sectorsize,
(NAPMPART - 1) * sectorsize, &error);
if (buf == NULL || error != 0)
break;
for (i = 1; i < NAPMPART; i++) {
g_dec_apple_partition(buf + ((i - 1) * sectorsize),
&ms->apmpart[i]);
}
npart = 0;
for (i = 0; i < NAPMPART; i++) {
apm = &ms->apmpart[i];
/*
* Validate partition sig and global mapcount
*/
if (apm->am_sig[0] != 'P' ||
apm->am_sig[1] != 'M')
continue;
if (apm->am_mapcnt != ms->am_mapcnt0)
continue;
if (bootverbose) {
printf("APM Slice %d (%s/%s) on %s:\n",
i + 1, apm->am_name, apm->am_type,
gp->name);
/* g_apple_print(i, dp + i); */
}
npart++;
g_topology_lock();
g_slice_config(gp, i, G_SLICE_CONFIG_SET,
(off_t)apm->am_start << 9ULL,
(off_t)apm->am_partcnt << 9ULL,
sectorsize,
"%ss%d", gp->name, i + 1);
g_topology_unlock();
}
break;
} while(0);
g_topology_lock();
g_access_rel(cp, -1, 0, 0);
if (LIST_EMPTY(&gp->provider)) {
g_std_spoiled(cp);
return (NULL);
}
return (gp);
}
static struct g_class g_apple_class = {
.name = APPLE_CLASS_NAME,
.taste = g_apple_taste,
G_CLASS_INITIALIZER
};
DECLARE_GEOM_CLASS(g_apple_class, g_apple);
