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util-linux/libblkid/src/partitions/solaris_x86.c

154 lines
4.1 KiB

/*
* Solaris x86 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 "partitions.h"
/*
* Solaris-x86 is always within primary dos partition (nested PT table). The
* solaris-x86 vtoc allows to split the entire partition to "slices". The
* offset (start) of the slice is always relatively to the primary dos
* partition.
*
* Note that Solaris-SPARC uses entire disk with a different partitioning
* scheme.
*/
/* some other implementation than Linux kernel assume 8 partitions only */
#define SOLARIS_MAXPARTITIONS 16
/* disklabel (vtoc) location */
#define SOLARIS_SECTOR 1 /* in 512-sectors */
#define SOLARIS_OFFSET (SOLARIS_SECTOR << 9) /* in bytes */
#define SOLARIS_MAGICOFFSET (SOLARIS_OFFSET + 12) /* v_sanity offset in bytes */
/* slice tags */
#define SOLARIS_TAG_WHOLEDISK 5
struct solaris_slice {
uint16_t s_tag; /* ID tag of partition */
uint16_t s_flag; /* permission flags */
uint32_t s_start; /* start sector no of partition */
uint32_t s_size; /* # of blocks in partition */
} __attribute__((packed));
struct solaris_vtoc {
unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */
uint32_t v_sanity; /* to verify vtoc sanity */
uint32_t v_version; /* layout version */
char v_volume[8]; /* volume name */
uint16_t v_sectorsz; /* sector size in bytes */
uint16_t v_nparts; /* number of partitions */
unsigned int v_reserved[10]; /* free space */
struct solaris_slice v_slice[SOLARIS_MAXPARTITIONS]; /* slices */
unsigned int timestamp[SOLARIS_MAXPARTITIONS]; /* timestamp (unsupported) */
char v_asciilabel[128]; /* for compatibility */
} __attribute__((packed));
static int probe_solaris_pt(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
struct solaris_vtoc *l; /* disk label */
struct solaris_slice *p; /* partition */
blkid_parttable tab = NULL;
blkid_partition parent;
blkid_partlist ls;
int i;
uint16_t nparts;
l = (struct solaris_vtoc *) blkid_probe_get_sector(pr, SOLARIS_SECTOR);
if (!l) {
if (errno)
return -errno;
goto nothing;
}
if (le32_to_cpu(l->v_version) != 1) {
DBG(LOWPROBE, ul_debug(
"WARNING: unsupported solaris x86 version %d, ignore",
le32_to_cpu(l->v_version)));
goto nothing;
}
if (blkid_partitions_need_typeonly(pr))
/* caller does not ask for details about partitions */
return BLKID_PROBE_OK;
ls = blkid_probe_get_partlist(pr);
if (!ls)
goto nothing;
parent = blkid_partlist_get_parent(ls);
tab = blkid_partlist_new_parttable(ls, "solaris", SOLARIS_OFFSET);
if (!tab)
goto err;
nparts = le16_to_cpu(l->v_nparts);
if (nparts > SOLARIS_MAXPARTITIONS)
nparts = SOLARIS_MAXPARTITIONS;
for (i = 1, p = &l->v_slice[0]; i < nparts; i++, p++) {
uint32_t start = le32_to_cpu(p->s_start);
uint32_t size = le32_to_cpu(p->s_size);
blkid_partition par;
if (size == 0 || le16_to_cpu(p->s_tag) == SOLARIS_TAG_WHOLEDISK)
continue;
if (parent)
/* Solaris slices are relative to the parent (primary
* DOS partition) */
start += blkid_partition_get_start(parent);
if (parent && !blkid_is_nested_dimension(parent, start, size)) {
DBG(LOWPROBE, ul_debug(
"WARNING: solaris partition (%d) overflow "
"detected, ignore", i));
continue;
}
par = blkid_partlist_add_partition(ls, tab, start, size);
if (!par)
goto err;
blkid_partition_set_type(par, le16_to_cpu(p->s_tag));
blkid_partition_set_flags(par, le16_to_cpu(p->s_flag));
}
return BLKID_PROBE_OK;
nothing:
return BLKID_PROBE_NONE;
err:
return -ENOMEM;
}
const struct blkid_idinfo solaris_x86_pt_idinfo =
{
.name = "solaris",
.probefunc = probe_solaris_pt,
.magics =
{
{
.magic = "\xEE\xDE\x0D\x60", /* little-endian magic string */
.len = 4, /* v_sanity size in bytes */
.sboff = SOLARIS_MAGICOFFSET /* offset of v_sanity */
},
{ NULL }
}
};