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-rw-r--r--lib/libdisk/open_disk.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/lib/libdisk/open_disk.c b/lib/libdisk/open_disk.c
new file mode 100644
index 000000000000..6ffe88d61a4e
--- /dev/null
+++ b/lib/libdisk/open_disk.c
@@ -0,0 +1,308 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <inttypes.h>
+#include <err.h>
+#include <sys/sysctl.h>
+#include <sys/stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/disklabel.h>
+#include <sys/gpt.h>
+#include <paths.h>
+#include "libdisk.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <assert.h>
+
+#ifdef DEBUG
+#define DPRINT(x) warn x
+#define DPRINTX(x) warnx x
+#else
+#define DPRINT(x)
+#define DPRINTX(x)
+#endif
+
+struct disk *
+Int_Open_Disk(const char *name, char *conftxt)
+{
+ struct disk *d;
+ int i, line = 1;
+ char *p, *q, *r, *a, *b, *n, *t, *sn;
+ daddr_t o, len, off;
+ u_int l, s, ty, sc, hd, alt;
+ daddr_t lo[10];
+
+ /*
+ * Locate the disk (by name) in our sysctl output
+ */
+ for (p = conftxt; p != NULL && *p; p = strchr(p, '\n'), line++) {
+ if (*p == '\n')
+ p++;
+ a = strsep(&p, " ");
+ /* Skip anything not with index 0 */
+ if (strcmp(a, "0"))
+ continue;
+
+ /* Skip anything not a disk */
+ a = strsep(&p, " ");
+ if (strcmp(a, "DISK"))
+ continue;
+
+ a = strsep(&p, " ");
+ if (strcmp(a, name))
+ continue;
+ break;
+ }
+
+ q = strchr(p, '\n');
+ if (q != NULL)
+ *q++ = '\0';
+
+ d = (struct disk *)calloc(sizeof *d, 1);
+ if(d == NULL)
+ return NULL;
+
+ d->name = strdup(name);
+
+ a = strsep(&p, " "); /* length in bytes */
+ len = strtoimax(a, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse length in line %d (r='%s')\n",
+ name, line, r);
+ return NULL;
+ }
+
+ a = strsep(&p, " "); /* sectorsize */
+ s = strtoul(a, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse sector size in line %d (r='%s')\n",
+ name, line, r);
+ return NULL;
+ }
+
+ if (s == 0)
+ return (NULL);
+ d->sector_size = s;
+ len /= s; /* media size in number of sectors. */
+
+ if (Add_Chunk(d, 0, len, name, whole, 0, 0, "-")) {
+ DPRINT(("Failed to add 'whole' chunk"));
+ }
+
+ /* Try to parse any fields after the sector size in the DISK entry line */
+ for (;;) {
+ a = strsep(&p, " ");
+ if (a == NULL)
+ break;
+ b = strsep(&p, " ");
+ o = strtoimax(b, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse parameter '%s' in line %d (r='%s')\n",
+ name, a, line, r);
+ return NULL;
+ }
+ if (!strcmp(a, "hd"))
+ d->bios_hd = o;
+ else if (!strcmp(a, "sc"))
+ d->bios_sect = o;
+ else
+ printf("libdisk: Int_Open_Disk(%s): unknown parameter '%s' with value '%s' in line %d, ignored\n",
+ name, a, b, line);
+ }
+
+ /*
+ * Calculate the number of cylinders this disk must have. If we have
+ * an obvious insanity, we set the number of cylinders to zero.
+ */
+ o = d->bios_hd * d->bios_sect;
+ d->bios_cyl = (o != 0) ? len / o : 0;
+
+ p = q; line++; /* p is now the start of the line _after_ the DISK entry */
+ lo[0] = 0;
+
+ for (; p != NULL && *p; p = q, line++) {
+ sn = NULL;
+ q = strchr(p, '\n');
+ if (q != NULL)
+ *q++ = '\0';
+ a = strsep(&p, " "); /* Index */
+ /*
+ * If we find index 0 again, this means we've encountered another disk, so it's safe to assume this disk
+ * has been processed.
+ */
+ if (!strcmp(a, "0"))
+ break;
+ l = strtoimax(a, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse depth '%s' in line %d (r='%s')\n",
+ name, a, line, r);
+ return NULL;
+
+ }
+ t = strsep(&p, " "); /* Type {SUN, BSD, MBR, PC98, GPT} */
+ n = strsep(&p, " "); /* name */
+ a = strsep(&p, " "); /* len */
+ len = strtoimax(a, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse length '%s' in line %d (r='%s')\n",
+ name, a, line, r);
+ continue;
+ }
+ a = strsep(&p, " "); /* secsize */
+ s = strtoimax(a, &r, 0);
+ if (*r) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse sector size '%s' in line %d (r='%s')\n",
+ name, a, line, r);
+ continue;
+ }
+ for (;;) {
+ a = strsep(&p, " ");
+ if (a == NULL)
+ break;
+ /* XXX: Slice name may include a space. */
+ if (!strcmp(a, "sn")) {
+ sn = p;
+ break;
+ }
+ b = strsep(&p, " ");
+ o = strtoimax(b, &r, 0);
+ /* APPLE have ty as a string */
+ if ((*r) && strcmp(t, "APPLE") &&
+ strcmp(t, "GPT") && strcmp(t, "PART")) {
+ printf("libdisk: Int_Open_Disk(%s): can't parse parameter '%s' in line %d (r='%s')\n",
+ name, a, line, r);
+ break;
+ }
+ if (!strcmp(a, "o"))
+ off = o;
+ else if (!strcmp(a, "i"))
+ i = (!strcmp(t, "PART")) ? o - 1 : o;
+ else if (!strcmp(a, "ty"))
+ ty = o;
+ else if (!strcmp(a, "sc"))
+ sc = o;
+ else if (!strcmp(a, "hd"))
+ hd = o;
+ else if (!strcmp(a, "alt"))
+ alt = o;
+ else if (!strcmp(a, "xs"))
+ t = b;
+ else if (!strcmp(a, "xt")) {
+ if (*r)
+ sn = b;
+ else
+ ty = o;
+ }
+ }
+
+ /* PLATFORM POLICY BEGIN ----------------------------------- */
+ if (platform == p_sparc64 && !strcmp(t, "SUN") && i == 2)
+ continue;
+ if (platform == p_sparc64 && !strcmp(t, "SUN") &&
+ d->chunks->part->part == NULL) {
+ d->bios_hd = hd;
+ d->bios_sect = sc;
+ o = d->chunks->size / (hd * sc);
+ o *= (hd * sc);
+ o -= alt * hd * sc;
+ if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) {
+ DPRINT(("Failed to add 'freebsd' chunk"));
+ }
+ }
+ if (platform == p_alpha && !strcmp(t, "BSD") &&
+ d->chunks->part->part == NULL) {
+ if (Add_Chunk(d, 0, d->chunks->size, name, freebsd,
+ 0, 0, "-")) {
+ DPRINT(("Failed to add 'freebsd' chunk"));
+ }
+ }
+ if (!strcmp(t, "BSD") && i == RAW_PART)
+ continue;
+ /* PLATFORM POLICY END ------------------------------------- */
+
+ off /= s;
+ len /= s;
+ off += lo[l - 1];
+ lo[l] = off;
+ if (!strcmp(t, "SUN"))
+ i = Add_Chunk(d, off, len, n, part, 0, 0, 0);
+ else if (!strncmp(t, "MBR", 3)) {
+ switch (ty) {
+ case 0xa5:
+ i = Add_Chunk(d, off, len, n, freebsd, ty, 0, 0);
+ break;
+ case 0x01:
+ case 0x04:
+ case 0x06:
+ case 0x0b:
+ case 0x0c:
+ case 0x0e:
+ i = Add_Chunk(d, off, len, n, fat, ty, 0, 0);
+ break;
+ case 0xef: /* EFI */
+ i = Add_Chunk(d, off, len, n, efi, ty, 0, 0);
+ break;
+ default:
+ i = Add_Chunk(d, off, len, n, mbr, ty, 0, 0);
+ break;
+ }
+ } else if (!strcmp(t, "BSD"))
+ i = Add_Chunk(d, off, len, n, part, ty, 0, 0);
+ else if (!strcmp(t, "PC98")) {
+ switch (ty & 0x7f) {
+ case 0x14:
+ i = Add_Chunk(d, off, len, n, freebsd, ty, 0,
+ sn);
+ break;
+ case 0x20:
+ case 0x21:
+ case 0x22:
+ case 0x23:
+ case 0x24:
+ i = Add_Chunk(d, off, len, n, fat, ty, 0, sn);
+ break;
+ default:
+ i = Add_Chunk(d, off, len, n, pc98, ty, 0, sn);
+ break;
+ }
+ } else if (!strcmp(t, "GPT"))
+ i = Add_Chunk(d, off, len, n, gpt, 0, 0, b);
+ else if (!strcmp(t, "APPLE"))
+ i = Add_Chunk(d, off, len, n, apple, 0, 0, sn);
+ else
+ ; /* Ignore unknown classes. */
+ }
+ /* PLATFORM POLICY BEGIN ------------------------------------- */
+ /* We have a chance to do things on a blank disk here */
+ if (platform == p_sparc64 && d->chunks->part->part == NULL) {
+ hd = d->bios_hd;
+ sc = d->bios_sect;
+ o = d->chunks->size / (hd * sc);
+ o *= (hd * sc);
+ o -= 2 * hd * sc;
+ if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) {
+ DPRINT(("Failed to add 'freebsd' chunk"));
+ }
+ }
+ /* PLATFORM POLICY END --------------------------------------- */
+
+ return (d);
+ i = 0;
+}
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