diff options
Diffstat (limited to 'sys/geom/geom_bsd.c')
| -rw-r--r-- | sys/geom/geom_bsd.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/sys/geom/geom_bsd.c b/sys/geom/geom_bsd.c new file mode 100644 index 0000000..47e601d --- /dev/null +++ b/sys/geom/geom_bsd.c @@ -0,0 +1,257 @@ +/*- + * 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> +#ifndef _KERNEL +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <signal.h> +#include <err.h> +#else +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/conf.h> +#include <sys/bio.h> +#include <sys/malloc.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#endif +#include <sys/errno.h> +#include <sys/disklabel.h> +#include <geom/geom.h> +#include <geom/geom_slice.h> + +#define BSD_METHOD_NAME "BSD-method" + +struct g_bsd_softc { + struct disklabel ondisk; + struct disklabel inram; +}; + +static void +ondisk2inram(struct g_bsd_softc *sc) +{ + struct partition *ppp; + unsigned offset; + int i; + + sc->inram = sc->ondisk; + offset = sc->inram.d_partitions[RAW_PART].p_offset; + for (i = 0; i < 8; i++) { + ppp = &sc->inram.d_partitions[i]; + if (ppp->p_offset >= offset) + ppp->p_offset -= offset; + } + sc->inram.d_checksum = 0; + sc->inram.d_checksum = dkcksum(&sc->inram); +} + +static int +g_bsd_start(struct bio *bp) +{ + struct g_geom *gp; + struct g_bsd_softc *ms; + struct g_slicer *gsp; + struct partinfo pi; + + gp = bp->bio_to->geom; + gsp = gp->softc; + ms = gsp->softc; + if (g_haveattr(bp, "IOCTL::DIOCGDINFO", + &ms->inram, + sizeof ms->inram)) + return (1); + if (!strcmp(bp->bio_attribute, "IOCTL::DIOCGPART")) { + pi.disklab = &ms->inram; + pi.part = &ms->inram.d_partitions[bp->bio_to->index]; + if (g_haveattr(bp, "IOCTL::DIOCGPART", &pi, sizeof pi)) + return (1); + } + return (0); +} + +static void +g_bsd_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp) +{ +#if 0 + struct g_mbr_softc *ms; + struct g_slicer *gsp; + + gsp = gp->softc; + ms = gsp->softc; + if (pp != NULL) { + sbuf_printf(sb, "%s<type>%d</type>\n", + indent, ms->type[pp->index]); + } +#endif + g_slice_dumpconf(sb, indent, gp, cp, pp); +} + +static struct g_geom * +g_bsd_taste(struct g_method *mp, struct g_provider *pp, struct thread *tp, int flags) +{ + struct g_geom *gp; + struct g_consumer *cp; + struct g_provider *pp2; + int error, i, j, npart; + u_char *buf; + struct g_bsd_softc *ms; + struct disklabel *dl; + u_int secsize; + u_int fwsectors, fwheads; + off_t mediasize; + struct partition *ppp, *ppr; + + g_trace(G_T_TOPOLOGY, "bsd_taste(%s,%s)", mp->name, pp->name); + g_topology_assert(); + if (flags == G_TF_NORMAL && + !strcmp(pp->geom->method->name, BSD_METHOD_NAME)) + return (NULL); + gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_bsd_start); + if (gp == NULL) + return (NULL); + g_topology_unlock(); + gp->dumpconf = g_bsd_dumpconf; + npart = 0; + while (1) { /* a trick to allow us to use break */ + j = sizeof i; + error = g_io_getattr("MBR::type", cp, &j, &i, tp); + if (!error && i != 165 && flags == G_TF_NORMAL) + break; + j = sizeof secsize; + error = g_io_getattr("GEOM::sectorsize", cp, &j, &secsize, tp); + if (error) { + secsize = 512; + printf("g_bsd_taste: error %d Sectors are %d bytes\n", + error, secsize); + } + j = sizeof mediasize; + error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize, tp); + if (error) { + mediasize = 0; + printf("g_error %d Mediasize is %lld bytes\n", + error, mediasize); + } + buf = g_read_data(cp, secsize * LABELSECTOR, secsize, &error); + if (buf == NULL || error != 0) + break; + bcopy(buf, &ms->ondisk, sizeof(ms->ondisk)); + dl = &ms->ondisk; + g_free(buf); + if (dl->d_magic != DISKMAGIC) + break; + if (dl->d_magic2 != DISKMAGIC) + break; + if (dkcksum(dl) != 0) + break; + if (bootverbose) + g_hexdump(dl, sizeof(*dl)); + if (dl->d_secsize < secsize) + break; + if (dl->d_secsize > secsize) + secsize = dl->d_secsize; + ppr = &dl->d_partitions[2]; + for (i = 0; i < 8; i++) { + ppp = &dl->d_partitions[i]; + if (ppp->p_size == 0) + continue; + npart++; + pp2 = g_slice_addslice(gp, i, + ((off_t)(ppp->p_offset - ppr->p_offset)) << 9ULL, + ((off_t)ppp->p_size) << 9ULL, + "%s%c", pp->name, 'a' + i); + g_error_provider(pp2, 0); + } + ondisk2inram(ms); + break; + } + if (npart == 0 && ( + (flags == G_TF_INSIST && mediasize != 0) || + (flags == G_TF_TRANSPARENT))) { + dl = &ms->ondisk; + bzero(dl, sizeof *dl); + dl->d_magic = DISKMAGIC; + dl->d_magic2 = DISKMAGIC; + ppp = &dl->d_partitions[RAW_PART]; + ppp->p_offset = 0; + ppp->p_size = mediasize / secsize; + dl->d_npartitions = MAXPARTITIONS; + dl->d_interleave = 1; + dl->d_secsize = secsize; + dl->d_rpm = 3600; + j = sizeof fwsectors; + error = g_io_getattr("GEOM::fwsectors", cp, &j, &fwsectors, tp); + if (error) + dl->d_nsectors = 32; + else + dl->d_nsectors = fwsectors; + error = g_io_getattr("GEOM::fwheads", cp, &j, &fwheads, tp); + if (error) + dl->d_ntracks = 64; + else + dl->d_ntracks = fwheads; + dl->d_secpercyl = dl->d_nsectors * dl->d_ntracks; + dl->d_ncylinders = ppp->p_size / dl->d_secpercyl; + dl->d_secperunit = ppp->p_size; + dl->d_checksum = 0; + dl->d_checksum = dkcksum(dl); + ms->inram = ms->ondisk; + pp2 = g_slice_addslice(gp, RAW_PART, + 0, mediasize, "%s%c", pp->name, 'a' + RAW_PART); + g_error_provider(pp2, 0); + npart = 1; + } + g_topology_lock(); + error = g_access_rel(cp, -1, 0, 0); + if (npart > 0) + return (gp); + g_std_spoiled(cp); + return (NULL); +} + +static struct g_method g_bsd_method = { + BSD_METHOD_NAME, + g_bsd_taste, + g_slice_access, + g_slice_orphan, + NULL, + G_METHOD_INITSTUFF +}; + +DECLARE_GEOM_METHOD(g_bsd_method, g_bsd); |
