#include <string.h>
#include <errno.h>
#include <ctype.h>
+#include <byteswap.h>
#include "libvolume_id.h"
#include "util.h"
-static struct mdp_super_block {
+static struct mdp0_super_block {
uint32_t md_magic;
uint32_t major_version;
uint32_t minor_version;
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 0xa92b4efc
+#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;
+ mdp0 = (struct mdp0_super_block *) buf;
+
+ if (le32_to_cpu(mdp0->md_magic) == MD_SB_MAGIC) {
+ uuid.ints[0] = bswap_32(mdp0->set_uuid0);
+ if (le32_to_cpu(mdp0->minor_version >= 90)) {
+ uuid.ints[1] = bswap_32(mdp0->set_uuid1);
+ uuid.ints[2] = bswap_32(mdp0->set_uuid2);
+ uuid.ints[3] = bswap_32(mdp0->set_uuid3);
+ } else {
+ uuid.ints[1] = 0;
+ uuid.ints[2] = 0;
+ uuid.ints[3] = 0;
+ }
+ volume_id_set_uuid(id, uuid.bytes, 0, UUID_MD);
+ 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;
+ if (be32_to_cpu(mdp0->minor_version >= 90)) {
+ uuid.ints[1] = mdp0->set_uuid1;
+ uuid.ints[2] = mdp0->set_uuid2;
+ uuid.ints[3] = mdp0->set_uuid3;
+ } else {
+ uuid.ints[1] = 0;
+ uuid.ints[2] = 0;
+ uuid.ints[3] = 0;
+ }
+ volume_id_set_uuid(id, uuid.bytes, 0, UUID_MD);
+ 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;
+
+ 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;
- mdp = (struct mdp_super_block *) buf;
+ info("probing at offset 0x%llx, size 0x%llx",
+ (unsigned long long) off, (unsigned long long) size);
- if (le32_to_cpu(mdp->md_magic) != MD_MAGIC)
+ buf = volume_id_get_buffer(id, off, 0x800);
+ if (buf == NULL)
return -1;
+ mdp1 = (struct mdp1_super_block *) buf;
- memcpy(uuid, &mdp->set_uuid0, 4);
- memcpy(&uuid[4], &mdp->set_uuid1, 12);
- volume_id_set_uuid(id, uuid, UUID_DCE);
+ if (le32_to_cpu(mdp1->magic) != MD_SB_MAGIC)
+ return -1;
- 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));
+ if (le32_to_cpu(mdp1->major_version) != 1)
+ return -1;
- dbg("found raid signature");
+ volume_id_set_uuid(id, mdp1->set_uuid, 0, UUID_MD);
+ volume_id_set_label_raw(id, mdp1->set_name, 32);
+ volume_id_set_label_string(id, mdp1->set_name, 32);
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;
+
+ /* version 0 at the end of the device */
+ sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES;
+ if (volume_id_probe_linux_raid0(id, off + sboff, size) == 0)
+ return 0;
+
+ /* version 1.0 at the end of the device */
+ sboff = (size & ~(0x1000 - 1)) - 0x2000;
+ if (volume_id_probe_linux_raid1(id, off + sboff, size) == 0) {
+ strcpy(id->type_version, "1.0");
+ return 0;
+ }
+
+ /* version 1.1 at the start of the device */
+ if (volume_id_probe_linux_raid1(id, off, size) == 0) {
+ strcpy(id->type_version, "1.1");
+ return 0;
+ }
+
+ /* version 1.2 at 4k offset from the start */
+ if (volume_id_probe_linux_raid1(id, off + 0x1000, size) == 0) {
+ strcpy(id->type_version, "1.2");
+ return 0;
+ }
+
+ return -1;
+}
~ianmdlvl / elogind.git / blobdiff