258 lines
7.0 KiB
C
258 lines
7.0 KiB
C
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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 <sys/disklabel.h>
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#include <geom/geom.h>
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#include <geom/geom_slice.h>
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#define BSD_METHOD_NAME "BSD-method"
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struct g_bsd_softc {
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struct disklabel ondisk;
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struct disklabel inram;
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};
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static void
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ondisk2inram(struct g_bsd_softc *sc)
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{
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struct partition *ppp;
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unsigned offset;
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int i;
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sc->inram = sc->ondisk;
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offset = sc->inram.d_partitions[RAW_PART].p_offset;
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for (i = 0; i < 8; i++) {
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ppp = &sc->inram.d_partitions[i];
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if (ppp->p_offset >= offset)
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ppp->p_offset -= offset;
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}
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sc->inram.d_checksum = 0;
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sc->inram.d_checksum = dkcksum(&sc->inram);
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}
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static int
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g_bsd_start(struct bio *bp)
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{
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struct g_geom *gp;
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struct g_bsd_softc *ms;
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struct g_slicer *gsp;
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struct partinfo pi;
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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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if (g_haveattr(bp, "IOCTL::DIOCGDINFO",
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&ms->inram,
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sizeof ms->inram))
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return (1);
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if (!strcmp(bp->bio_attribute, "IOCTL::DIOCGPART")) {
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pi.disklab = &ms->inram;
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pi.part = &ms->inram.d_partitions[bp->bio_to->index];
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if (g_haveattr(bp, "IOCTL::DIOCGPART", &pi, sizeof pi))
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return (1);
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}
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return (0);
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}
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static void
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g_bsd_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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#if 0
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struct g_mbr_softc *ms;
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struct g_slicer *gsp;
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gsp = gp->softc;
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ms = gsp->softc;
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if (pp != NULL) {
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sbuf_printf(sb, "%s<type>%d</type>\n",
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indent, ms->type[pp->index]);
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}
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#endif
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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_bsd_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_bsd_softc *ms;
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struct disklabel *dl;
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u_int secsize;
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u_int fwsectors, fwheads;
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off_t mediasize;
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struct partition *ppp, *ppr;
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g_trace(G_T_TOPOLOGY, "bsd_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_bsd_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_bsd_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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j = sizeof i;
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error = g_io_getattr("MBR::type", cp, &j, &i, tp);
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if (!error && i != 165 && 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_bsd_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, mediasize);
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}
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buf = g_read_data(cp, secsize * LABELSECTOR, secsize, &error);
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if (buf == NULL || error != 0)
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break;
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bcopy(buf, &ms->ondisk, sizeof(ms->ondisk));
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dl = &ms->ondisk;
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g_free(buf);
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if (dl->d_magic != DISKMAGIC)
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break;
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if (dl->d_magic2 != DISKMAGIC)
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break;
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if (dkcksum(dl) != 0)
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break;
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if (bootverbose)
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g_hexdump(dl, sizeof(*dl));
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if (dl->d_secsize < secsize)
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break;
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if (dl->d_secsize > secsize)
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secsize = dl->d_secsize;
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ppr = &dl->d_partitions[2];
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for (i = 0; i < 8; i++) {
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ppp = &dl->d_partitions[i];
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if (ppp->p_size == 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)(ppp->p_offset - ppr->p_offset)) << 9ULL,
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((off_t)ppp->p_size) << 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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ondisk2inram(ms);
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break;
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}
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if (npart == 0 && (
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(flags == G_TF_INSIST && mediasize != 0) ||
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(flags == G_TF_TRANSPARENT))) {
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dl = &ms->ondisk;
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bzero(dl, sizeof *dl);
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dl->d_magic = DISKMAGIC;
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dl->d_magic2 = DISKMAGIC;
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ppp = &dl->d_partitions[RAW_PART];
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ppp->p_offset = 0;
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ppp->p_size = mediasize / secsize;
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dl->d_npartitions = MAXPARTITIONS;
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dl->d_interleave = 1;
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dl->d_secsize = secsize;
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dl->d_rpm = 3600;
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j = sizeof fwsectors;
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error = g_io_getattr("GEOM::fwsectors", cp, &j, &fwsectors, tp);
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if (error)
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dl->d_nsectors = 32;
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else
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dl->d_nsectors = fwsectors;
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error = g_io_getattr("GEOM::fwheads", cp, &j, &fwheads, tp);
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if (error)
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dl->d_ntracks = 64;
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else
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dl->d_ntracks = fwheads;
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dl->d_secpercyl = dl->d_nsectors * dl->d_ntracks;
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dl->d_ncylinders = ppp->p_size / dl->d_secpercyl;
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dl->d_secperunit = ppp->p_size;
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dl->d_checksum = 0;
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dl->d_checksum = dkcksum(dl);
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ms->inram = ms->ondisk;
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pp2 = g_slice_addslice(gp, RAW_PART,
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0, mediasize, "%s%c", pp->name, 'a' + RAW_PART);
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g_error_provider(pp2, 0);
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npart = 1;
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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_bsd_method = {
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BSD_METHOD_NAME,
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g_bsd_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_bsd_method, g_bsd);
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