MFMBR: Add ioctls for writing an IPL and a boot menu.
This commit is contained in:
Yoshihiro Takahashi
parent
f61e88f901
commit
05f0a5a323
@ -77,60 +77,11 @@ g_dec_dos_partition(u_char *ptr, struct dos_partition *d)
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}
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struct g_pc98_softc {
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int type [NDOSPART];
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struct dos_partition dp[NDOSPART];
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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 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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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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strncpy(sname, mp->dp[pp->index].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 void
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g_pc98_print(int i, struct dos_partition *dp)
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{
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@ -147,17 +98,197 @@ g_pc98_print(int i, struct dos_partition *dp)
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printf(" sname:%s\n", sname);
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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)
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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 dos_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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* XXX: Some sources indicate this is a magic sequence, but appearantly
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* XXX: it is not universal. Documentation would be wonderfule to have.
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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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g_dec_dos_partition(
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sec + 512 + i * sizeof(struct dos_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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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 void
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g_pc98_ioctl(void *arg)
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{
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struct bio *bp;
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struct g_geom *gp;
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struct g_slicer *gsp;
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struct g_pc98_softc *ms;
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struct g_ioctl *gio;
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struct g_consumer *cp;
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u_char *sec;
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int error;
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/* Get hold of the interesting bits from the bio. */
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bp = arg;
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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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gio = (struct g_ioctl *)bp->bio_data;
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/* The disklabel to set is the ioctl argument. */
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sec = gio->data;
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error = g_pc98_modify(gp, ms, sec);
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if (error) {
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g_io_deliver(bp, error);
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return;
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}
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cp = LIST_FIRST(&gp->consumer);
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error = g_write_data(cp, 0, sec, 8192);
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g_io_deliver(bp, error);
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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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struct g_ioctl *gio;
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int idx, error;
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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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/* We only handle ioctl(2) requests of the right format. */
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if (strcmp(bp->bio_attribute, "GEOM::ioctl"))
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return (0);
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else if (bp->bio_length != sizeof(*gio))
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return (0);
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/* Get hold of the ioctl parameters. */
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gio = (struct g_ioctl *)bp->bio_data;
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switch (gio->cmd) {
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case DIOCGPC98:
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/* Return a copy of the disklabel to userland. */
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bcopy(mp->sec, gio->data, 8192);
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g_io_deliver(bp, 0);
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return (1);
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case DIOCSPC98:
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/*
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* These we cannot do without the topology lock and some
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* some I/O requests. Ask the event-handler to schedule
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* us in a less restricted environment.
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*/
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error = g_call_me(g_pc98_ioctl, bp);
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if (error)
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g_io_deliver(bp, error);
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/*
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* We must return non-zero to indicate that we will deal
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* with this bio, even though we have not done so yet.
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*/
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return (1);
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default:
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return (0);
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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 dos_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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g_dec_dos_partition(
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mp->sec + 512 +
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pp->index * sizeof(struct dos_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, i, npart;
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int error;
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struct g_pc98_softc *ms;
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struct g_slicer *gsp;
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u_int fwsectors, fwheads, sectorsize;
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u_char *buf;
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off_t spercyl;
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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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@ -170,7 +301,6 @@ g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
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gsp = gp->softc;
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g_topology_unlock();
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gp->dumpconf = g_pc98_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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@ -190,56 +320,16 @@ g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
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if (sectorsize < 512)
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break;
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gsp->frontstuff = sectorsize * fwsectors;
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spercyl = (off_t)fwsectors * fwheads * sectorsize;
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buf = g_read_data(cp, 0,
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sectorsize < 1024 ? 1024 : sectorsize, &error);
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buf = g_read_data(cp, 0, 8192, &error);
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if (buf == NULL || error != 0)
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break;
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if (buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa) {
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g_free(buf);
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break;
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}
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#if 0
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/*
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* XXX: Some sources indicate this is a magic sequence, but appearantly
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* XXX: it is not universal. Documentation would be wonderfule to have.
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*/
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if (buf[4] != 'I' || buf[5] != 'P' ||
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buf[6] != 'L' || buf[7] != '1') {
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g_free(buf);
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break;
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}
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#endif
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for (i = 0; i < NDOSPART; i++)
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g_dec_dos_partition(
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buf + 512 + i * sizeof(struct dos_partition),
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ms->dp + i);
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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);
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g_topology_unlock();
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g_free(buf);
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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 (ms->dp[i].dp_ssect == ms->dp[i].dp_esect &&
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ms->dp[i].dp_shd == ms->dp[i].dp_ehd &&
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ms->dp[i].dp_scyl == ms->dp[i].dp_ecyl)
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continue;
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if (ms->dp[i].dp_ecyl == 0)
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continue;
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if (bootverbose) {
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printf("PC98 Slice %d on %s:\n",
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i + 1, gp->name);
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g_pc98_print(i, ms->dp + i);
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}
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npart++;
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ms->type[i] = (ms->dp[i].dp_sid << 8) |
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ms->dp[i].dp_mid;
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g_topology_lock();
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g_slice_config(gp, i, G_SLICE_CONFIG_SET,
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ms->dp[i].dp_scyl * spercyl,
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(ms->dp[i].dp_ecyl - ms->dp[i].dp_scyl + 1) *
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spercyl,
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sectorsize,
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"%ss%d", gp->name, i + 1);
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g_topology_unlock();
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}
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break;
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}
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g_topology_lock();
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@ -37,6 +37,8 @@
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#ifndef _SYS_DISKPC98_H_
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#define _SYS_DISKPC98_H_
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#include <sys/ioccom.h>
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#define DOSBBSECTOR 0 /* DOS boot block relative sector number */
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#define DOSPARTOFF 0
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#define NDOSPART 16
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@ -64,4 +66,7 @@ struct dos_partition {
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CTASSERT(sizeof (struct dos_partition) == 32);
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#endif
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#define DIOCGPC98 _IOR('M', 128, u_char[8192])
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#define DIOCSPC98 _IOW('M', 129, u_char[8192])
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#endif /* !_SYS_DISKPC98_H_ */
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