369 lines
9.7 KiB
C
369 lines
9.7 KiB
C
/*-
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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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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/endian.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/bio.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/diskpc98.h>
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#include <geom/geom.h>
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#include <geom/geom_slice.h>
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#define PC98_CLASS_NAME "PC98"
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struct g_pc98_softc {
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u_int fwsectors, fwheads, sectorsize;
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int type[NDOSPART];
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u_char sec[8192];
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};
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static void
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g_pc98_print(int i, struct pc98_partition *dp)
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{
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char sname[17];
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strncpy(sname, dp->dp_name, 16);
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sname[16] = '\0';
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hexdump(dp, sizeof(dp[0]), NULL, 0);
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printf("[%d] mid:%d(0x%x) sid:%d(0x%x)",
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i, dp->dp_mid, dp->dp_mid, dp->dp_sid, dp->dp_sid);
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printf(" s:%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect);
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printf(" e:%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect);
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printf(" sname:%s\n", sname);
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}
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/*
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* XXX: Add gctl_req arg and give good error msgs.
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* XXX: Check that length argument does not bring boot code inside any slice.
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*/
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static int
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g_pc98_modify(struct g_geom *gp, struct g_pc98_softc *ms, u_char *sec, int len __unused)
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{
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int i, error;
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off_t s[NDOSPART], l[NDOSPART];
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struct pc98_partition dp[NDOSPART];
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g_topology_assert();
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if (sec[0x1fe] != 0x55 || sec[0x1ff] != 0xaa)
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return (EBUSY);
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#if 0
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/*
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* By convetion, it seems that the ipl program has a jump at location
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* 0 to the real start of the boot loader. By convetion, it appears
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* that after this jump, there's a string, terminated by at last one,
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* if not more, zeros, followed by the target of the jump. FreeBSD's
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* pc98 boot0 uses 'IPL1' followed by 3 zeros here, likely for
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* compatibility with some older boot loader. Linux98's boot loader
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* appears to use 'Linux 98' followed by only two. GRUB/98 appears to
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* use 'GRUB/98 ' followed by none. These last two appear to be
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* ported from the ia32 versions, but appear to show similar
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* convention. Grub/98 has an additional NOP after the jmp, which
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* isn't present in others.
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*
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* The following test was inspired by looking only at partitions
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* with FreeBSD's boot0 (or one that it is compatible with). As
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* such, if failed when other IPL programs were used.
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*/
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if (sec[4] != 'I' || sec[5] != 'P' || sec[6] != 'L' || sec[7] != '1')
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return (EBUSY);
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#endif
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for (i = 0; i < NDOSPART; i++)
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pc98_partition_dec(
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sec + 512 + i * sizeof(struct pc98_partition), &dp[i]);
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for (i = 0; i < NDOSPART; i++) {
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/* If start and end are identical it's bogus */
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if (dp[i].dp_ssect == dp[i].dp_esect &&
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dp[i].dp_shd == dp[i].dp_ehd &&
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dp[i].dp_scyl == dp[i].dp_ecyl)
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s[i] = l[i] = 0;
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else if (dp[i].dp_ecyl == 0)
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s[i] = l[i] = 0;
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else {
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s[i] = (off_t)dp[i].dp_scyl *
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ms->fwsectors * ms->fwheads * ms->sectorsize;
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l[i] = (off_t)(dp[i].dp_ecyl - dp[i].dp_scyl + 1) *
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ms->fwsectors * ms->fwheads * ms->sectorsize;
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}
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if (bootverbose) {
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printf("PC98 Slice %d on %s:\n", i + 1, gp->name);
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g_pc98_print(i, dp + i);
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}
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if (s[i] < 0 || l[i] < 0)
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error = EBUSY;
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else
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error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
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s[i], l[i], ms->sectorsize,
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"%ss%d", gp->name, i + 1);
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if (error)
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return (error);
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}
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for (i = 0; i < NDOSPART; i++) {
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ms->type[i] = (dp[i].dp_sid << 8) | dp[i].dp_mid;
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g_slice_config(gp, i, G_SLICE_CONFIG_SET, s[i], l[i],
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ms->sectorsize, "%ss%d", gp->name, i + 1);
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}
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bcopy(sec, ms->sec, sizeof (ms->sec));
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return (0);
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}
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static int
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g_pc98_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
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{
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struct g_geom *gp;
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struct g_pc98_softc *ms;
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struct g_slicer *gsp;
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struct g_consumer *cp;
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int error, opened;
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gp = pp->geom;
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gsp = gp->softc;
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ms = gsp->softc;
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opened = 0;
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error = 0;
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switch(cmd) {
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case DIOCSPC98: {
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if (!(fflag & FWRITE))
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return (EPERM);
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DROP_GIANT();
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g_topology_lock();
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cp = LIST_FIRST(&gp->consumer);
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if (cp->acw == 0) {
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error = g_access(cp, 0, 1, 0);
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if (error == 0)
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opened = 1;
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}
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if (!error)
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error = g_pc98_modify(gp, ms, data, 8192);
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if (!error)
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error = g_write_data(cp, 0, data, 8192);
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if (opened)
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g_access(cp, 0, -1 , 0);
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g_topology_unlock();
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PICKUP_GIANT();
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return(error);
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}
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default:
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return (ENOIOCTL);
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}
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}
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static int
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g_pc98_start(struct bio *bp)
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{
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struct g_provider *pp;
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struct g_geom *gp;
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struct g_pc98_softc *mp;
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struct g_slicer *gsp;
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int idx;
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pp = bp->bio_to;
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idx = pp->index;
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gp = pp->geom;
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gsp = gp->softc;
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mp = gsp->softc;
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if (bp->bio_cmd == BIO_GETATTR) {
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if (g_handleattr_int(bp, "PC98::type", mp->type[idx]))
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return (1);
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if (g_handleattr_off_t(bp, "PC98::offset",
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gsp->slices[idx].offset))
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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_pc98_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
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struct g_consumer *cp __unused, struct g_provider *pp)
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{
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struct g_pc98_softc *mp;
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struct g_slicer *gsp;
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struct pc98_partition dp;
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char sname[17];
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gsp = gp->softc;
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mp = gsp->softc;
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g_slice_dumpconf(sb, indent, gp, cp, pp);
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if (pp != NULL) {
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pc98_partition_dec(
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mp->sec + 512 +
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pp->index * sizeof(struct pc98_partition), &dp);
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strncpy(sname, dp.dp_name, 16);
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sname[16] = '\0';
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if (indent == NULL) {
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sbuf_printf(sb, " ty %d", mp->type[pp->index]);
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sbuf_printf(sb, " sn %s", sname);
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} else {
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sbuf_printf(sb, "%s<type>%d</type>\n", indent,
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mp->type[pp->index]);
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sbuf_printf(sb, "%s<sname>%s</sname>\n", indent,
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sname);
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}
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}
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}
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static struct g_geom *
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g_pc98_taste(struct g_class *mp, struct g_provider *pp, 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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int error;
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struct g_pc98_softc *ms;
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u_int fwsectors, fwheads, sectorsize;
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u_char *buf;
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g_trace(G_T_TOPOLOGY, "g_pc98_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->class->name, PC98_CLASS_NAME))
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return (NULL);
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gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_pc98_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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do {
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if (gp->rank != 2 && flags == G_TF_NORMAL)
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break;
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error = g_getattr("GEOM::fwsectors", cp, &fwsectors);
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if (error || fwsectors == 0) {
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fwsectors = 17;
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if (bootverbose)
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printf("g_pc98_taste: guessing %d sectors\n",
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fwsectors);
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}
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error = g_getattr("GEOM::fwheads", cp, &fwheads);
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if (error || fwheads == 0) {
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fwheads = 8;
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if (bootverbose)
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printf("g_pc98_taste: guessing %d heads\n",
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fwheads);
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}
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sectorsize = cp->provider->sectorsize;
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if (sectorsize % 512 != 0)
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break;
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buf = g_read_data(cp, 0, 8192, NULL);
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if (buf == NULL)
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break;
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ms->fwsectors = fwsectors;
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ms->fwheads = fwheads;
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ms->sectorsize = sectorsize;
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g_topology_lock();
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g_pc98_modify(gp, ms, buf, 8192);
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g_topology_unlock();
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g_free(buf);
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break;
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} while (0);
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g_topology_lock();
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g_access(cp, -1, 0, 0);
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if (LIST_EMPTY(&gp->provider)) {
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g_slice_spoiled(cp);
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return (NULL);
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}
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return (gp);
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}
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static void
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g_pc98_config(struct gctl_req *req, struct g_class *mp, const char *verb)
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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_pc98_softc *ms;
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struct g_slicer *gsp;
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int opened = 0, error = 0;
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void *data;
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int len;
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g_topology_assert();
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gp = gctl_get_geom(req, mp, "geom");
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if (gp == NULL)
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return;
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if (strcmp(verb, "write PC98")) {
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gctl_error(req, "Unknown verb");
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return;
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}
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gsp = gp->softc;
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ms = gsp->softc;
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data = gctl_get_param(req, "data", &len);
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if (data == NULL)
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return;
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if (len < 8192 || (len % 512)) {
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gctl_error(req, "Wrong request length");
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return;
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}
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cp = LIST_FIRST(&gp->consumer);
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if (cp->acw == 0) {
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error = g_access(cp, 0, 1, 0);
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if (error == 0)
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opened = 1;
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}
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if (!error)
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error = g_pc98_modify(gp, ms, data, len);
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if (error)
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gctl_error(req, "conflict with open slices");
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if (!error)
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error = g_write_data(cp, 0, data, len);
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if (error)
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gctl_error(req, "sector zero write failed");
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if (opened)
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g_access(cp, 0, -1 , 0);
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return;
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}
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static struct g_class g_pc98_class = {
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.name = PC98_CLASS_NAME,
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.version = G_VERSION,
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.taste = g_pc98_taste,
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.dumpconf = g_pc98_dumpconf,
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.ctlreq = g_pc98_config,
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.ioctl = g_pc98_ioctl,
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};
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DECLARE_GEOM_CLASS(g_pc98_class, g_pc98);
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