aboutsummaryrefslogtreecommitdiff
path: root/sys/geom/geom_mbr.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/geom/geom_mbr.c')
-rw-r--r--sys/geom/geom_mbr.c531
1 files changed, 0 insertions, 531 deletions
diff --git a/sys/geom/geom_mbr.c b/sys/geom/geom_mbr.c
deleted file mode 100644
index e40f3b4cb3d5..000000000000
--- a/sys/geom/geom_mbr.c
+++ /dev/null
@@ -1,531 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * 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.
- *
- * 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.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/errno.h>
-#include <sys/endian.h>
-#include <sys/systm.h>
-#include <sys/sysctl.h>
-#include <sys/kernel.h>
-#include <sys/fcntl.h>
-#include <sys/malloc.h>
-#include <sys/bio.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/md5.h>
-#include <sys/proc.h>
-
-#include <sys/diskmbr.h>
-#include <sys/sbuf.h>
-#include <geom/geom.h>
-#include <geom/geom_slice.h>
-
-FEATURE(geom_mbr, "GEOM DOS/MBR partitioning support");
-
-#define MBR_CLASS_NAME "MBR"
-#define MBREXT_CLASS_NAME "MBREXT"
-
-static int g_mbr_once = 0;
-
-static struct dos_partition historical_bogus_partition_table[NDOSPART] = {
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0x80, 0, 1, 0, DOSPTYP_386BSD, 255, 255, 255, 0, 50000, },
-};
-
-static struct dos_partition historical_bogus_partition_table_fixed[NDOSPART] = {
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
- { 0x80, 0, 1, 0, DOSPTYP_386BSD, 254, 255, 255, 0, 50000, },
-};
-
-static void
-g_mbr_print(int i, struct dos_partition *dp)
-{
-
- printf("[%d] f:%02x typ:%d", i, dp->dp_flag, dp->dp_typ);
- printf(" s(CHS):%d/%d/%d", DPCYL(dp->dp_scyl, dp->dp_ssect),
- dp->dp_shd, DPSECT(dp->dp_ssect));
- printf(" e(CHS):%d/%d/%d", DPCYL(dp->dp_ecyl, dp->dp_esect),
- dp->dp_ehd, DPSECT(dp->dp_esect));
- printf(" s:%d l:%d\n", dp->dp_start, dp->dp_size);
-}
-
-struct g_mbr_softc {
- int type [NDOSPART];
- u_int sectorsize;
- u_char sec0[512];
- u_char slicesum[16];
-};
-
-/*
- * XXX: Add gctl_req arg and give good error msgs.
- * XXX: Check that length argument does not bring boot code inside any slice.
- */
-static int
-g_mbr_modify(struct g_geom *gp, struct g_mbr_softc *ms, u_char *sec0, int len __unused)
-{
- int i, error;
- off_t l[NDOSPART];
- struct dos_partition ndp[NDOSPART], *dp;
- MD5_CTX md5sum;
-
- g_topology_assert();
-
- if (sec0[0x1fe] != 0x55 && sec0[0x1ff] != 0xaa)
- return (EBUSY);
-
- dp = ndp;
- for (i = 0; i < NDOSPART; i++) {
- dos_partition_dec(
- sec0 + DOSPARTOFF + i * sizeof(struct dos_partition),
- dp + i);
- }
- if ((!bcmp(dp, historical_bogus_partition_table,
- sizeof historical_bogus_partition_table)) ||
- (!bcmp(dp, historical_bogus_partition_table_fixed,
- sizeof historical_bogus_partition_table_fixed))) {
- /*
- * We will not allow people to write these from "the inside",
- * Since properly selfdestructing takes too much code. If
- * people really want to do this, they cannot have any
- * providers of this geom open, and in that case they can just
- * as easily overwrite the MBR in the parent device.
- */
- return(EBUSY);
- }
- for (i = 0; i < NDOSPART; i++) {
- /*
- * A Protective MBR (PMBR) has a single partition of
- * type 0xEE spanning the whole disk. Such a MBR
- * protects a GPT on the disk from MBR tools that
- * don't know anything about GPT. We're interpreting
- * it a bit more loosely: any partition of type 0xEE
- * is to be skipped as it doesn't contain any data
- * that we should care about. We still allow other
- * partitions to be present in the MBR. A PMBR will
- * be handled correctly anyway.
- */
- if (dp[i].dp_typ == DOSPTYP_PMBR)
- l[i] = 0;
- else if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80)
- l[i] = 0;
- else if (dp[i].dp_typ == 0)
- l[i] = 0;
- else
- l[i] = (off_t)dp[i].dp_size * ms->sectorsize;
- error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
- (off_t)dp[i].dp_start * ms->sectorsize, l[i],
- ms->sectorsize, "%ss%d", gp->name, 1 + i);
- if (error)
- return (error);
- }
- for (i = 0; i < NDOSPART; i++) {
- ms->type[i] = dp[i].dp_typ;
- g_slice_config(gp, i, G_SLICE_CONFIG_SET,
- (off_t)dp[i].dp_start * ms->sectorsize, l[i],
- ms->sectorsize, "%ss%d", gp->name, 1 + i);
- }
- bcopy(sec0, ms->sec0, 512);
-
- /*
- * Calculate MD5 from the first sector and use it for avoiding
- * recursive slices creation.
- */
- MD5Init(&md5sum);
- MD5Update(&md5sum, ms->sec0, sizeof(ms->sec0));
- MD5Final(ms->slicesum, &md5sum);
-
- return (0);
-}
-
-static int
-g_mbr_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
-{
- struct g_geom *gp;
- struct g_mbr_softc *ms;
- struct g_slicer *gsp;
- struct g_consumer *cp;
- int error, opened;
-
- gp = pp->geom;
- gsp = gp->softc;
- ms = gsp->softc;
-
- opened = 0;
- error = 0;
- switch(cmd) {
- case DIOCSMBR: {
- if (!(fflag & FWRITE))
- return (EPERM);
- g_topology_lock();
- cp = LIST_FIRST(&gp->consumer);
- if (cp->acw == 0) {
- error = g_access(cp, 0, 1, 0);
- if (error == 0)
- opened = 1;
- }
- if (!error)
- error = g_mbr_modify(gp, ms, data, 512);
- if (!error)
- error = g_write_data(cp, 0, data, 512);
- if (opened)
- g_access(cp, 0, -1 , 0);
- g_topology_unlock();
- return(error);
- }
- default:
- return (ENOIOCTL);
- }
-}
-
-static int
-g_mbr_start(struct bio *bp)
-{
- struct g_provider *pp;
- struct g_geom *gp;
- struct g_mbr_softc *mp;
- struct g_slicer *gsp;
- int idx;
-
- pp = bp->bio_to;
- idx = pp->index;
- gp = pp->geom;
- gsp = gp->softc;
- mp = gsp->softc;
- if (bp->bio_cmd == BIO_GETATTR) {
- if (g_handleattr_int(bp, "MBR::type", mp->type[idx]))
- return (1);
- if (g_handleattr_off_t(bp, "MBR::offset",
- gsp->slices[idx].offset))
- return (1);
- if (g_handleattr(bp, "MBR::slicesum", mp->slicesum,
- sizeof(mp->slicesum)))
- return (1);
- }
-
- return (0);
-}
-
-static void
-g_mbr_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
-{
- struct g_mbr_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, " ty %d", mp->type[pp->index]);
- else
- sbuf_printf(sb, "%s<type>%d</type>\n", indent,
- mp->type[pp->index]);
- }
-}
-
-static struct g_geom *
-g_mbr_taste(struct g_class *mp, struct g_provider *pp, int insist)
-{
- struct g_geom *gp;
- struct g_consumer *cp;
- int error;
- struct g_mbr_softc *ms;
- u_int fwsectors, sectorsize;
- u_char *buf;
- u_char hash[16];
- MD5_CTX md5sum;
-
- g_trace(G_T_TOPOLOGY, "mbr_taste(%s,%s)", mp->name, pp->name);
- g_topology_assert();
- if (!strcmp(pp->geom->class->name, MBR_CLASS_NAME))
- return (NULL);
- gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_mbr_start);
- if (gp == NULL)
- return (NULL);
- g_topology_unlock();
- do {
- error = g_getattr("GEOM::fwsectors", cp, &fwsectors);
- if (error)
- fwsectors = 17;
- sectorsize = cp->provider->sectorsize;
- if (sectorsize < 512)
- break;
- ms->sectorsize = sectorsize;
- buf = g_read_data(cp, 0, sectorsize, NULL);
- if (buf == NULL)
- break;
-
- /*
- * Calculate MD5 from the first sector and use it for avoiding
- * recursive slices creation.
- */
- bcopy(buf, ms->sec0, 512);
- MD5Init(&md5sum);
- MD5Update(&md5sum, ms->sec0, sizeof(ms->sec0));
- MD5Final(ms->slicesum, &md5sum);
-
- error = g_getattr("MBR::slicesum", cp, &hash);
- if (!error && !bcmp(ms->slicesum, hash, sizeof(hash))) {
- g_free(buf);
- break;
- }
-
- g_topology_lock();
- g_mbr_modify(gp, ms, buf, 512);
- g_topology_unlock();
- g_free(buf);
- break;
- } while (0);
- g_topology_lock();
- g_access(cp, -1, 0, 0);
- if (LIST_EMPTY(&gp->provider)) {
- g_slice_spoiled(cp);
- return (NULL);
- }
- if (!g_mbr_once) {
- g_mbr_once = 1;
- printf(
- "WARNING: geom_mbr (geom %s) is deprecated, "
- "use gpart instead.\n", gp->name);
- }
- return (gp);
-}
-
-static void
-g_mbr_config(struct gctl_req *req, struct g_class *mp, const char *verb)
-{
- struct g_geom *gp;
- struct g_consumer *cp;
- struct g_mbr_softc *ms;
- struct g_slicer *gsp;
- int opened = 0, error = 0;
- void *data;
- int len;
-
- g_topology_assert();
- gp = gctl_get_geom(req, mp, "geom");
- if (gp == NULL)
- return;
- if (strcmp(verb, "write MBR")) {
- gctl_error(req, "Unknown verb");
- return;
- }
- gsp = gp->softc;
- ms = gsp->softc;
- data = gctl_get_param(req, "data", &len);
- if (data == NULL)
- return;
- if (len < 512 || (len % 512)) {
- gctl_error(req, "Wrong request length");
- return;
- }
- cp = LIST_FIRST(&gp->consumer);
- if (cp->acw == 0) {
- error = g_access(cp, 0, 1, 0);
- if (error == 0)
- opened = 1;
- }
- if (!error)
- error = g_mbr_modify(gp, ms, data, len);
- if (error)
- gctl_error(req, "conflict with open slices");
- if (!error)
- error = g_write_data(cp, 0, data, len);
- if (error)
- gctl_error(req, "sector zero write failed");
- if (opened)
- g_access(cp, 0, -1 , 0);
- return;
-}
-
-static struct g_class g_mbr_class = {
- .name = MBR_CLASS_NAME,
- .version = G_VERSION,
- .taste = g_mbr_taste,
- .dumpconf = g_mbr_dumpconf,
- .ctlreq = g_mbr_config,
- .ioctl = g_mbr_ioctl,
-};
-
-DECLARE_GEOM_CLASS(g_mbr_class, g_mbr);
-
-#define NDOSEXTPART 32
-struct g_mbrext_softc {
- int type [NDOSEXTPART];
-};
-
-static int
-g_mbrext_start(struct bio *bp)
-{
- struct g_provider *pp;
- struct g_geom *gp;
- struct g_mbrext_softc *mp;
- struct g_slicer *gsp;
- int idx;
-
- pp = bp->bio_to;
- idx = pp->index;
- gp = pp->geom;
- gsp = gp->softc;
- mp = gsp->softc;
- if (bp->bio_cmd == BIO_GETATTR) {
- if (g_handleattr_int(bp, "MBR::type", mp->type[idx]))
- return (1);
- }
- return (0);
-}
-
-static void
-g_mbrext_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
-{
- struct g_mbrext_softc *mp;
- struct g_slicer *gsp;
-
- g_slice_dumpconf(sb, indent, gp, cp, pp);
- gsp = gp->softc;
- mp = gsp->softc;
- if (pp != NULL) {
- if (indent == NULL)
- sbuf_printf(sb, " ty %d", mp->type[pp->index]);
- else
- sbuf_printf(sb, "%s<type>%d</type>\n", indent,
- mp->type[pp->index]);
- }
-}
-
-static struct g_geom *
-g_mbrext_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
-{
- struct g_geom *gp;
- struct g_consumer *cp;
- int error, i, slice;
- struct g_mbrext_softc *ms;
- off_t off;
- u_char *buf;
- struct dos_partition dp[4];
- u_int fwsectors, sectorsize;
-
- g_trace(G_T_TOPOLOGY, "g_mbrext_taste(%s,%s)", mp->name, pp->name);
- g_topology_assert();
- if (strcmp(pp->geom->class->name, MBR_CLASS_NAME))
- return (NULL);
- gp = g_slice_new(mp, NDOSEXTPART, pp, &cp, &ms, sizeof *ms,
- g_mbrext_start);
- if (gp == NULL)
- return (NULL);
- g_topology_unlock();
- off = 0;
- slice = 0;
- do {
- error = g_getattr("MBR::type", cp, &i);
- if (error || (i != DOSPTYP_EXT && i != DOSPTYP_EXTLBA))
- break;
- error = g_getattr("GEOM::fwsectors", cp, &fwsectors);
- if (error)
- fwsectors = 17;
- sectorsize = cp->provider->sectorsize;
- if (sectorsize != 512)
- break;
- for (;;) {
- buf = g_read_data(cp, off, sectorsize, NULL);
- if (buf == NULL)
- break;
- if (buf[0x1fe] != 0x55 && buf[0x1ff] != 0xaa) {
- g_free(buf);
- break;
- }
- for (i = 0; i < NDOSPART; i++)
- dos_partition_dec(
- buf + DOSPARTOFF +
- i * sizeof(struct dos_partition), dp + i);
- g_free(buf);
- if (0 && bootverbose) {
- printf("MBREXT Slice %d on %s:\n",
- slice + 5, gp->name);
- g_mbr_print(0, dp);
- g_mbr_print(1, dp + 1);
- }
- if ((dp[0].dp_flag & 0x7f) == 0 &&
- dp[0].dp_size != 0 && dp[0].dp_typ != 0) {
- g_topology_lock();
- g_slice_config(gp, slice, G_SLICE_CONFIG_SET,
- (((off_t)dp[0].dp_start) << 9ULL) + off,
- ((off_t)dp[0].dp_size) << 9ULL,
- sectorsize,
- "%*.*s%d",
- (int)strlen(gp->name) - 1,
- (int)strlen(gp->name) - 1,
- gp->name,
- slice + 5);
- g_topology_unlock();
- ms->type[slice] = dp[0].dp_typ;
- slice++;
- }
- if (dp[1].dp_flag != 0)
- break;
- if (dp[1].dp_typ != DOSPTYP_EXT &&
- dp[1].dp_typ != DOSPTYP_EXTLBA)
- break;
- if (dp[1].dp_size == 0)
- break;
- off = ((off_t)dp[1].dp_start) << 9ULL;
- }
- break;
- } while (0);
- g_topology_lock();
- g_access(cp, -1, 0, 0);
- if (LIST_EMPTY(&gp->provider)) {
- g_slice_spoiled(cp);
- return (NULL);
- }
- return (gp);
-}
-
-
-static struct g_class g_mbrext_class = {
- .name = MBREXT_CLASS_NAME,
- .version = G_VERSION,
- .taste = g_mbrext_taste,
- .dumpconf = g_mbrext_dumpconf,
-};
-
-DECLARE_GEOM_CLASS(g_mbrext_class, g_mbrext);
-MODULE_VERSION(geom_mbr, 0);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-14 12:01:19 +0000