Imported Upstream version 2.22upstream/2.22upstream

1 files changed, 188 insertions, 0 deletions

diff --git a/libblkid/src/partitions/sun.c b/libblkid/src/partitions/sun.c
new file mode 100644
index 0000000..f151f46
--- /dev/null
+++ b/libblkid/src/partitions/sun.c
@@ -0,0 +1,188 @@
+/*
+ * sun (solaris-sparc) partition parsing code
+ *
+ * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include "partitions.h"
+
+/* Supported VTOC setting */
+#define SUN_VTOC_SANITY		0x600DDEEE	/* magic number */
+#define SUN_VTOC_VERSION	1
+
+#define SUN_MAXPARTITIONS	8
+
+/* Partition IDs */
+#define SUN_TAG_WHOLEDISK          0x05
+
+struct sun_disklabel {
+	unsigned char info[128];   /* Informative text string */
+
+	struct sun_vtoc {
+		uint32_t version;     /* version */
+		char	 volume[8];   /* volume name */
+		uint16_t nparts;      /* num of partitions */
+
+		struct sun_info {     /* partition information */
+			uint16_t id;  /* tag */
+			uint16_t flags;
+		} __attribute__ ((packed)) infos[8];
+
+		uint16_t padding;      /* padding */
+		uint32_t bootinfo[3];  /* info needed by mboot */
+		uint32_t sanity;       /* magic number */
+		uint32_t reserved[10]; /* padding */
+		uint32_t timestamp[8]; /* partition timestamp */
+	} __attribute__ ((packed)) vtoc;
+
+	uint32_t write_reinstruct;     /* sectors to skip, writes */
+	uint32_t read_reinstruct;      /* sectors to skip, reads */
+	unsigned char spare[148];      /* padding */
+	uint16_t rspeed;               /* disk rotational speed */
+	uint16_t pcylcount;            /* physical cylinder count */
+	uint16_t sparecyl;             /* extra sects per cylinder */
+	uint16_t obs1;
+	uint16_t obs2;
+	uint16_t ilfact;               /* interleave factor */
+	uint16_t ncyl;                 /* data cylinder count */
+	uint16_t nacyl;                /* alt. cylinder count */
+	uint16_t ntrks;                /* tracks per cylinder   <---- */
+	uint16_t nsect;                /* sectors per track     <---- */
+	uint16_t obs3;
+	uint16_t obs4;
+
+	struct sun_partition {         /* partitions */
+		uint32_t start_cylinder;
+		uint32_t num_sectors;
+	} __attribute__ ((packed)) partitions[8];
+
+	uint16_t magic;                /* magic number */
+	uint16_t csum;                 /* label xor'd checksum */
+} __attribute__ ((packed));
+
+
+uint16_t count_checksum(struct sun_disklabel *label)
+{
+	uint16_t *ptr = ((uint16_t *) (label + 1)) - 1;
+	uint16_t sum;
+
+	for (sum = 0; ptr >= ((uint16_t *) label);)
+		sum ^= *ptr--;
+
+	return sum;
+}
+
+static int probe_sun_pt(blkid_probe pr,
+		const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+	struct sun_disklabel *l;
+	struct sun_partition *p;
+	blkid_parttable tab = NULL;
+	blkid_partlist ls;
+	uint16_t nparts;
+	blkid_loff_t spc;
+	int i, use_vtoc;
+
+	l = (struct sun_disklabel *) blkid_probe_get_sector(pr, 0);
+	if (!l)
+		goto nothing;
+
+	if (count_checksum(l)) {
+		DBG(DEBUG_LOWPROBE, printf(
+			"detected corrupted sun disk label -- ignore\n"));
+		goto nothing;
+	}
+
+	if (blkid_partitions_need_typeonly(pr))
+		/* caller does not ask for details about partitions */
+		return 0;
+
+	ls = blkid_probe_get_partlist(pr);
+	if (!ls)
+		goto err;
+
+	tab = blkid_partlist_new_parttable(ls, "sun", 0);
+	if (!tab)
+		goto err;
+
+	/* sectors per cylinder (partition offset is in cylinders...) */
+	spc = be16_to_cpu(l->ntrks) * be16_to_cpu(l->nsect);
+
+	DBG(DEBUG_LOWPROBE,
+		printf("Sun VTOC sanity=%u version=%u nparts=%u\n",
+			be32_to_cpu(l->vtoc.sanity),
+			be32_to_cpu(l->vtoc.version),
+			be16_to_cpu(l->vtoc.nparts)));
+
+	/* Check to see if we can use the VTOC table */
+	use_vtoc = ((be32_to_cpu(l->vtoc.sanity) == SUN_VTOC_SANITY) &&
+		    (be32_to_cpu(l->vtoc.version) == SUN_VTOC_VERSION) &&
+		    (be16_to_cpu(l->vtoc.nparts) <= SUN_MAXPARTITIONS));
+
+	/* Use 8 partition entries if not specified in validated VTOC */
+	nparts = use_vtoc ? be16_to_cpu(l->vtoc.nparts) : SUN_MAXPARTITIONS;
+
+	/*
+	 * So that old Linux-Sun partitions continue to work,
+	 * alow the VTOC to be used under the additional condition ...
+	 */
+	use_vtoc = use_vtoc || !(l->vtoc.sanity || l->vtoc.version || l->vtoc.nparts);
+
+	for (i = 0, p = l->partitions; i < nparts; i++, p++) {
+
+		blkid_loff_t start, size;
+		uint16_t type = 0, flags = 0;
+		blkid_partition par;
+
+                start = be32_to_cpu(p->start_cylinder) * spc;
+		size = be32_to_cpu(p->num_sectors);
+		if (use_vtoc) {
+			type = be16_to_cpu(l->vtoc.infos[i].id);
+			flags = be16_to_cpu(l->vtoc.infos[i].flags);
+		}
+
+		if (type == SUN_TAG_WHOLEDISK || !size) {
+			blkid_partlist_increment_partno(ls);
+			continue;
+		}
+		par = blkid_partlist_add_partition(ls, tab, start, size);
+		if (!par)
+			goto err;
+
+		if (type)
+			blkid_partition_set_type(par, type);
+		if (flags)
+			blkid_partition_set_flags(par, flags);
+	}
+	return 0;
+
+nothing:
+	return 1;
+err:
+	return -1;
+}
+
+
+const struct blkid_idinfo sun_pt_idinfo =
+{
+	.name		= "sun",
+	.probefunc	= probe_sun_pt,
+	.magics		=
+	{
+		{
+		  .magic = "\xDA\xBE",		/* big-endian magic string */
+		  .len = 2,
+		  .sboff = offsetof(struct sun_disklabel, magic)
+		},
+		{ NULL }
+	}
+};
+