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Diffstat (limited to 'libblkid/src/superblocks/drbdmanage.c')
-rw-r--r--libblkid/src/superblocks/drbdmanage.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/libblkid/src/superblocks/drbdmanage.c b/libblkid/src/superblocks/drbdmanage.c
new file mode 100644
index 0000000..b45f89b
--- /dev/null
+++ b/libblkid/src/superblocks/drbdmanage.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2015 by Philipp Marek <philipp.marek@linbit.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ *
+ * DRBD is a blocklevel replication solution in the Linux kernel,
+ * upstream since 2.6.33. (See http://drbd.linbit.com/)
+ * DRBDmanage is a configuration frontend that assists in
+ * creating/deleting/modifying DRBD resources across multiple machines
+ * (a DRBDmanage "cluster"); this file detects its control volume,
+ * which is replicated (via DRBD 9) on some of the nodes.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <inttypes.h>
+#include <stddef.h>
+
+#include "bitops.h"
+#include "superblocks.h"
+
+struct drbdmanage_hdr {
+ unsigned char magic[11];
+ unsigned char uuid[32];
+ unsigned char lf;
+} __attribute__ ((packed));
+
+struct drbdmanage_pers {
+ char magic[4];
+ uint32_t version_le;
+} __attribute__ ((packed));
+
+
+static const char persistence_magic[4] = { '\x1a', '\xdb', '\x98', '\xa2' };
+
+
+static int probe_drbdmanage(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ struct drbdmanage_hdr *hdr;
+ unsigned char *cp;
+ struct drbdmanage_pers *prs;
+
+ hdr = (struct drbdmanage_hdr*)
+ blkid_probe_get_buffer(pr, 0, sizeof(*hdr));
+ if (!hdr)
+ return errno ? -errno : 1;
+
+ for(cp=hdr->uuid; cp<&hdr->lf; cp++)
+ if (!isxdigit(*cp))
+ return 1;
+ if (hdr->lf != '\n')
+ return 1;
+
+ if (blkid_probe_set_id_label(pr, "UUID",
+ hdr->uuid, sizeof(hdr->uuid)))
+ return errno ? -errno : 1;
+
+ prs = (struct drbdmanage_pers*)
+ blkid_probe_get_buffer(pr, 0x1000, sizeof(*prs));
+ if (!prs)
+ return errno ? -errno : 1;
+
+ if (memcmp(prs->magic, persistence_magic, sizeof(prs->magic)) == 0 &&
+ blkid_probe_sprintf_version(pr, "%d", be32_to_cpu(prs->version_le)) != 0)
+ return errno ? -errno : 1;
+
+ return 0;
+}
+
+
+const struct blkid_idinfo drbdmanage_idinfo =
+{
+ .name = "drbdmanage_control_volume",
+ .usage = BLKID_USAGE_OTHER,
+ .probefunc = probe_drbdmanage,
+ .minsz = 64 * 1024,
+ .magics = {
+ { .magic = "$DRBDmgr=q", .len = 10, .sboff = 0 },
+ { NULL }
+ },
+};
+