shaba/systemd-stable
1
1
Fork 0
mirror of https://github.com/systemd/systemd-stable.git synced 2024-12-23 17:34:00 +03:00
Code

volume_id: add md metadata 1.0, 1.1, 1.2 support

Browse Source
This commit is contained in:
Kay Sievers 2007-04-24 18:35:24 +02:00
parent c77f75cad5
commit 07bc6002ca
2 changed files with 90 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
extras/volume_id/lib/Makefile
View File

@ -13,7 +13,7 @@ INSTALL_DATA = ${INSTALL} -m 644
INSTALL_LIB = ${INSTALL} -m 755
SHLIB_CUR = 0
SHLIB_REV = 75
SHLIB_REV = 76
SHLIB_AGE = 0
SHLIB = libvolume_id.so.$(SHLIB_CUR).$(SHLIB_REV).$(SHLIB_AGE)

110
extras/volume_id/lib/linux_raid.c
View File

@ -22,12 +22,13 @@
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <byteswap.h>
#include "libvolume_id.h"
#include "util.h"
static struct mdp_super_block {
uint8_t md_magic[4];
static struct mdp0_super_block {
uint32_t md_magic;
uint32_t major_version;
uint32_t minor_version;
uint32_t patch_version;
@ -43,42 +44,109 @@ static struct mdp_super_block {
uint32_t set_uuid1;
uint32_t set_uuid2;
uint32_t set_uuid3;
} PACKED *mdp;
} PACKED *mdp0;
struct mdp1_super_block {
uint32_t magic;
uint32_t major_version;
uint32_t feature_map;
uint32_t pad0;
uint8_t set_uuid[16];
uint8_t set_name[32];
} PACKED *mdp1;
#define MD_RESERVED_BYTES 0x10000
#define MD_MAGIC "\xfc\x4e\x2b\xa9"
#define MD_MAGIC_SWAP "\xa9\x2b\x4e\xfc"
#define MD_SB_MAGIC 0xa92b4efc
int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size)
static int volume_id_probe_linux_raid0(struct volume_id *id, uint64_t off, uint64_t size)
{
const uint8_t *buf;
uint64_t sboff;
uint8_t uuid[16];
union {
uint32_t ints[4];
uint8_t bytes[16];
} uuid;
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
if (size < 0x10000)
return -1;
sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES;
buf = volume_id_get_buffer(id, off + sboff, 0x800);
buf = volume_id_get_buffer(id, off, 0x800);
if (buf == NULL)
return -1;
mdp = (struct mdp_super_block *) buf;
mdp0 = (struct mdp0_super_block *) buf;
if ((memcmp(mdp->md_magic, MD_MAGIC, 4) != 0) &&
(memcmp(mdp->md_magic, MD_MAGIC_SWAP, 4) != 0))
if (le32_to_cpu(mdp0->md_magic) == MD_SB_MAGIC) {
uuid.ints[0] = bswap_32(mdp0->set_uuid0);
uuid.ints[1] = bswap_32(mdp0->set_uuid1);
uuid.ints[2] = bswap_32(mdp0->set_uuid2);
uuid.ints[3] = bswap_32(mdp0->set_uuid3);
volume_id_set_uuid(id, uuid.bytes, UUID_DCE);
snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
le32_to_cpu(mdp0->major_version),
le32_to_cpu(mdp0->minor_version),
le32_to_cpu(mdp0->patch_version));
} else if (be32_to_cpu(mdp0->md_magic) == MD_SB_MAGIC) {
uuid.ints[0] = mdp0->set_uuid0;
uuid.ints[1] = mdp0->set_uuid1;
uuid.ints[2] = mdp0->set_uuid2;
uuid.ints[3] = mdp0->set_uuid3;
volume_id_set_uuid(id, uuid.bytes, UUID_DCE);
snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
be32_to_cpu(mdp0->major_version),
be32_to_cpu(mdp0->minor_version),
be32_to_cpu(mdp0->patch_version));
} else
return -1;
memcpy(uuid, &mdp->set_uuid0, 4);
memcpy(&uuid[4], &mdp->set_uuid1, 12);
volume_id_set_uuid(id, uuid, UUID_DCE);
snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
le32_to_cpu(mdp->major_version),
le32_to_cpu(mdp->minor_version),
le32_to_cpu(mdp->patch_version));
dbg("found raid signature");
volume_id_set_usage(id, VOLUME_ID_RAID);
id->type = "linux_raid_member";
return 0;
}
static int volume_id_probe_linux_raid1(struct volume_id *id, uint64_t off, uint64_t size)
{
const uint8_t *buf;
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
buf = volume_id_get_buffer(id, off, 0x800);
if (buf == NULL)
return -1;
mdp1 = (struct mdp1_super_block *) buf;
if (le32_to_cpu(mdp1->magic) != MD_SB_MAGIC)
return -1;
volume_id_set_uuid(id, mdp1->set_uuid, UUID_DCE);
volume_id_set_label_raw(id, mdp1->set_name, 32);
volume_id_set_label_string(id, mdp1->set_name, 32);
snprintf(id->type_version, sizeof(id->type_version)-1, "%u", le32_to_cpu(mdp1->major_version));
volume_id_set_usage(id, VOLUME_ID_RAID);
id->type = "linux_raid_member";
return 0;
}
int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
uint64_t sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES;
/* version 0 at the end of the device */
if (volume_id_probe_linux_raid0(id, off + sboff, size) == 0)
return 0;
/* version 1.0 at the end of the device */
if (volume_id_probe_linux_raid1(id, off + sboff, size) == 0)
return 0;
/* version 1.1 at the start of the device */
if (volume_id_probe_linux_raid1(id, off, size) == 0)
return 0;
/* version 1.2 at 4k offset from the start */
if (volume_id_probe_linux_raid1(id, off + 0x1000, size) == 0)
return 0;
return -1;
}