summaryrefslogtreecommitdiffstats
path: root/libblkid/src/superblocks/via_raid.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--libblkid/src/superblocks/via_raid.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/libblkid/src/superblocks/via_raid.c b/libblkid/src/superblocks/via_raid.c
new file mode 100644
index 0000000..ee3ab65
--- /dev/null
+++ b/libblkid/src/superblocks/via_raid.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * Inspired by libvolume_id by
+ * Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+struct via_metadata {
+ uint16_t signature;
+ uint8_t version_number;
+ struct via_array {
+ uint16_t disk_bit_mask;
+ uint8_t disk_array_ex;
+ uint32_t capacity_low;
+ uint32_t capacity_high;
+ uint32_t serial_checksum;
+ } __attribute__((packed)) array;
+ uint32_t serial_checksum[8];
+ uint8_t checksum;
+} __attribute__((packed));
+
+#define VIA_SIGNATURE 0xAA55
+
+/* 8 bit checksum on first 50 bytes of metadata. */
+static uint8_t via_checksum(struct via_metadata *v)
+{
+ uint8_t i = 50, cs = 0;
+
+ while (i--)
+ cs += ((uint8_t*) v)[i];
+
+ return cs;
+}
+
+static int probe_viaraid(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ uint64_t off;
+ struct via_metadata *v;
+
+ if (pr->size < 0x10000)
+ return 1;
+ if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
+ return 1;
+
+ off = ((pr->size / 0x200)-1) * 0x200;
+
+ v = (struct via_metadata *)
+ blkid_probe_get_buffer(pr,
+ off,
+ sizeof(struct via_metadata));
+ if (!v)
+ return errno ? -errno : 1;
+
+ if (le16_to_cpu(v->signature) != VIA_SIGNATURE)
+ return 1;
+ if (v->version_number > 2)
+ return 1;
+ if (!blkid_probe_verify_csum(pr, via_checksum(v), v->checksum))
+ return 1;
+
+ if (blkid_probe_sprintf_version(pr, "%u", v->version_number) != 0)
+ return 1;
+ if (blkid_probe_set_magic(pr, off,
+ sizeof(v->signature),
+ (unsigned char *) &v->signature))
+ return 1;
+ return 0;
+}
+
+const struct blkid_idinfo viaraid_idinfo = {
+ .name = "via_raid_member",
+ .usage = BLKID_USAGE_RAID,
+ .probefunc = probe_viaraid,
+ .magics = BLKID_NONE_MAGIC
+};
+
+