Teach GEOM about Sun disklabel formats.
The detection code in this method is written so that it should work on all architectures which means that you can plug a Sun disk into a i386 now and access the partitions. We still need an endian-agnostic ufs/ffs before this is really interresting, but the main focus was to get sparc64 onto the GEOM trail.
This commit is contained in:
Poul-Henning Kamp
parent
19f1d16d37
commit
132f08d017
@ -694,6 +694,7 @@ geom/geom_mbr.c optional geom
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geom/geom_mbrext.c optional geom
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geom/geom_slice.c optional geom
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geom/geom_subr.c optional geom
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geom/geom_sunlabel.c optional geom
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gnu/ext2fs/ext2_alloc.c optional ext2fs \
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warning "kernel contains GPL contaminated ext2fs file system"
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gnu/ext2fs/ext2_balloc.c optional ext2fs
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209
sys/geom/geom_sunlabel.c
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209
sys/geom/geom_sunlabel.c
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@ -0,0 +1,209 @@
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/*-
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#ifndef _KERNEL
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <err.h>
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#else
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#endif
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#include <sys/errno.h>
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#include <geom/geom.h>
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#include <geom/geom_slice.h>
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#include <machine/endian.h>
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#define BSD_METHOD_NAME "SUNLABEL-method"
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static u_int
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g_u16be(u_char *p)
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{
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return ((p[0] << 8) | p[1]);
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}
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static u_int
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g_u32be(u_char *p)
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{
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return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
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}
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struct g_sunlabel_softc {
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int foo;
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};
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static int
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g_sunlabel_start(struct bio *bp)
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{
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struct g_geom *gp;
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struct g_sunlabel_softc *ms;
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struct g_slicer *gsp;
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gp = bp->bio_to->geom;
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gsp = gp->softc;
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ms = gsp->softc;
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return (0);
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}
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static void
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g_sunlabel_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
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{
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g_slice_dumpconf(sb, indent, gp, cp, pp);
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}
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static struct g_geom *
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g_sunlabel_taste(struct g_method *mp, struct g_provider *pp, struct thread *tp, int flags)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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struct g_provider *pp2;
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int error, i, j, npart;
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u_char *buf;
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struct g_sunlabel_softc *ms;
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u_int secsize, u, v, csize;
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off_t mediasize;
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g_trace(G_T_TOPOLOGY, "g_sunlabel_taste(%s,%s)", mp->name, pp->name);
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g_topology_assert();
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if (flags == G_TF_NORMAL &&
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!strcmp(pp->geom->method->name, BSD_METHOD_NAME))
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return (NULL);
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gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_sunlabel_start);
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if (gp == NULL)
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return (NULL);
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g_topology_unlock();
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gp->dumpconf = g_sunlabel_dumpconf;
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npart = 0;
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while (1) { /* a trick to allow us to use break */
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if (gp->rank != 2 && flags == G_TF_NORMAL)
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break;
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j = sizeof secsize;
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error = g_io_getattr("GEOM::sectorsize", cp, &j, &secsize, tp);
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if (error) {
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secsize = 512;
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printf("g_sunlabel_taste: error %d Sectors are %d bytes\n",
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error, secsize);
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}
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j = sizeof mediasize;
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error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize, tp);
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if (error) {
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mediasize = 0;
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printf("g_error %d Mediasize is %lld bytes\n",
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error, (long long)mediasize);
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}
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buf = g_read_data(cp, 0, secsize, &error);
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if (buf == NULL || error != 0)
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break;
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/* The second last short is a magic number */
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if (g_u16be(buf + 508) != 0xdabe)
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break;
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/* The shortword parity of the entire thing must be even */
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u = 0;
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for (i = 0; i < 512; i += 2)
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u ^= g_u16be(buf + i);
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if (u != 0)
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break;
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if (bootverbose) {
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g_hexdump(buf, 128);
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for (i = 0; i < 8; i++) {
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printf("part %d %u %u\n", i,
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g_u32be(buf + 444 + i * 8),
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g_u32be(buf + 448 + i * 8));
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}
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printf("v_version = %d\n", g_u32be(buf + 128));
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printf("v_nparts = %d\n", g_u16be(buf + 140));
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for (i = 0; i < 8; i++) {
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printf("v_part[%d] = %d %d\n",
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i, g_u16be(buf + 142 + i * 4),
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g_u16be(buf + 144 + i * 4));
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}
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printf("v_sanity %x\n", g_u32be(buf + 186));
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printf("v_version = %d\n", g_u32be(buf + 128));
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printf("v_rpm %d\n", g_u16be(buf + 420));
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printf("v_totalcyl %d\n", g_u16be(buf + 422));
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printf("v_cyl %d\n", g_u16be(buf + 432));
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printf("v_alt %d\n", g_u16be(buf + 434));
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printf("v_head %d\n", g_u16be(buf + 436));
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printf("v_sec %d\n", g_u16be(buf + 438));
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}
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csize = g_u16be(buf + 436) * g_u16be(buf + 438);
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for (i = 0; i < 8; i++) {
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v = g_u32be(buf + 444 + i * 8);
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u = g_u32be(buf + 448 + i * 8);
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if (u == 0)
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continue;
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npart++;
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pp2 = g_slice_addslice(gp, i,
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((off_t)v * csize) << 9ULL,
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((off_t)u) << 9ULL,
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"%s%c", pp->name, 'a' + i);
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g_error_provider(pp2, 0);
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}
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break;
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}
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g_topology_lock();
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error = g_access_rel(cp, -1, 0, 0);
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if (npart > 0)
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return (gp);
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g_std_spoiled(cp);
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return (NULL);
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}
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static struct g_method g_sunlabel_method = {
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BSD_METHOD_NAME,
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g_sunlabel_taste,
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g_slice_access,
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g_slice_orphan,
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NULL,
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G_METHOD_INITSTUFF
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};
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DECLARE_GEOM_METHOD(g_sunlabel_method, g_sunlabel);
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