libblkid: add SUN partitions support
Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
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cdb5fd1805
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@ -11,4 +11,5 @@ libblkid_partitions_la_SOURCES = partitions.c \
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aix.h \
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bsd.c \
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unixware.c \
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solaris_x86.c
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solaris_x86.c \
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sun.c
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@ -103,6 +103,7 @@ static void partitions_free_data(blkid_probe pr, void *data);
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static const struct blkid_idinfo *idinfos[] =
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{
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&aix_pt_idinfo,
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&sun_pt_idinfo,
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&bsd_pt_idinfo,
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&unixware_pt_idinfo,
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&solaris_x86_pt_idinfo
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@ -39,5 +39,6 @@ extern const struct blkid_idinfo aix_pt_idinfo;
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extern const struct blkid_idinfo bsd_pt_idinfo;
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extern const struct blkid_idinfo unixware_pt_idinfo;
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extern const struct blkid_idinfo solaris_x86_pt_idinfo;
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extern const struct blkid_idinfo sun_pt_idinfo;
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#endif /* BLKID_PARTITIONS_H */
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@ -0,0 +1,168 @@
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/*
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* sun (solaris-sparc) partition parsing code
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*
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* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stddef.h>
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#include "partitions.h"
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/* Supported VTOC setting */
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#define SUN_VTOC_SANITY 0x600DDEEE /* magic number */
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#define SUN_VTOC_VERSION 1
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#define SUN_MAXPARTITIONS 8
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/* Partition IDs */
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#define SUN_TAG_WHOLEDISK 0x05
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struct sun_disklabel {
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unsigned char info[128]; /* Informative text string */
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struct sun_vtoc {
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uint32_t version; /* version */
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char volume[8]; /* volume name */
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uint16_t nparts; /* num of partitions */
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struct sun_info { /* partition information */
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uint16_t id;
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uint16_t flags;
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} __attribute__ ((packed)) infos[8];
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uint16_t padding; /* padding */
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uint32_t bootinfo[3]; /* info needed by mboot */
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uint32_t sanity; /* magic number */
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uint32_t reserved[10]; /* padding */
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uint32_t timestamp[8]; /* partition timestamp */
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} __attribute__ ((packed)) vtoc;
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uint32_t write_reinstruct; /* sectors to skip, writes */
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uint32_t read_reinstruct; /* sectors to skip, reads */
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unsigned char spare[148]; /* padding */
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uint16_t rspeed; /* disk rotational speed */
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uint16_t pcylcount; /* physical cylinder count */
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uint16_t sparecyl; /* extra sects per cylinder */
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uint16_t obs1;
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uint16_t obs2;
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uint16_t ilfact; /* interleave factor */
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uint16_t ncyl; /* data cylinder count */
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uint16_t nacyl; /* alt. cylinder count */
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uint16_t ntrks; /* tracks per cylinder <---- */
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uint16_t nsect; /* sectors per track <---- */
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uint16_t obs3;
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uint16_t obs4;
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struct sun_partition { /* partitions */
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uint32_t start_cylinder;
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uint32_t num_sectors;
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} __attribute__ ((packed)) partitions[8];
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uint16_t magic; /* magic number */
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uint16_t csum; /* label xor'd checksum */
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} __attribute__ ((packed));
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uint16_t count_checksum(struct sun_disklabel *label)
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{
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uint16_t *ptr = ((uint16_t *) (label + 1)) - 1;
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uint16_t sum;
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for (sum = 0; ptr >= ((uint16_t *) label);)
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sum ^= *ptr--;
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return sum;
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}
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static int probe_sun_pt(blkid_probe pr, const struct blkid_idmag *mag)
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{
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struct sun_disklabel *l;
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struct sun_partition *p;
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struct sun_info *infos = NULL;
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blkid_parttable tab = NULL;
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blkid_partlist ls;
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uint16_t nparts;
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blkid_loff_t spc;
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int i;
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l = (struct sun_disklabel *) blkid_probe_get_sector(pr, 0);
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if (!l)
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goto nothing;
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if (count_checksum(l)) {
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DBG(DEBUG_LOWPROBE, printf(
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"detected corrupted sun disk label -- ignore\n"));
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goto nothing;
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}
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if (blkid_partitions_need_typeonly(pr))
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/* caller does not ask for details about partitions */
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return 0;
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ls = blkid_probe_get_partlist(pr);
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if (!ls)
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goto err;
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tab = blkid_partlist_new_parttable(ls, "sun", 0);
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if (!tab)
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goto err;
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/* default number of partitions */
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nparts = SUN_MAXPARTITIONS;
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/* sectors per cylinder (partition offset is in cylinders...) */
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spc = be16_to_cpu(l->ntrks) * be16_to_cpu(l->nsect);
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if ((be32_to_cpu(l->vtoc.sanity) == SUN_VTOC_SANITY) &&
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(be32_to_cpu(l->vtoc.version) == SUN_VTOC_VERSION) &&
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(be16_to_cpu(l->vtoc.nparts) <= SUN_MAXPARTITIONS)) {
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nparts = be16_to_cpu(l->vtoc.nparts);
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infos = l->vtoc.infos; /* for partition type */
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}
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for (i = 0, p = l->partitions; i < nparts; i++, p++) {
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blkid_loff_t start;
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blkid_loff_t size;
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uint16_t type = infos ? be16_to_cpu(infos[i].id) : 0;
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start = be32_to_cpu(p->start_cylinder) * spc;
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size = be32_to_cpu(p->num_sectors);
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if (type == SUN_TAG_WHOLEDISK || !size)
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continue;
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if (!blkid_partlist_add_partition(ls, tab, type, start, size))
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goto err;
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}
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return 0;
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nothing:
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return 1;
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err:
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return -1;
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}
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const struct blkid_idinfo sun_pt_idinfo =
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{
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.name = "sun",
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.probefunc = probe_sun_pt,
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.magics =
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{
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{
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.magic = "\xDA\xBE", /* big-endian magic string */
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.len = 2,
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.sboff = offsetof(struct sun_disklabel, magic)
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},
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{ NULL }
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}
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};
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