import ceph 16.2.7

[ceph.git] / ceph / src / pmdk / src / common / uuid.c

diff --git a/ceph/src/pmdk/src/common/uuid.c b/ceph/src/pmdk/src/common/uuid.c
new file mode 100644 (file)
index 0000000..94fdd73
--- /dev/null
+++ b/ceph/src/pmdk/src/common/uuid.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/* Copyright 2014-2018, Intel Corporation */
+
+/*
+ * uuid.c -- uuid utilities
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "uuid.h"
+#include "out.h"
+
+/*
+ * util_uuid_to_string -- generate a string form of the uuid
+ */
+int
+util_uuid_to_string(const uuid_t u, char *buf)
+{
+       int len; /* size that is returned from sprintf call */
+
+       if (buf == NULL) {
+               LOG(2, "invalid buffer for uuid string");
+               return -1;
+       }
+
+       if (u == NULL) {
+               LOG(2, "invalid uuid structure");
+               return -1;
+       }
+
+       struct uuid *uuid = (struct uuid *)u;
+       len = snprintf(buf, POOL_HDR_UUID_STR_LEN,
+               "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+               uuid->time_low, uuid->time_mid, uuid->time_hi_and_ver,
+               uuid->clock_seq_hi, uuid->clock_seq_low, uuid->node[0],
+               uuid->node[1], uuid->node[2], uuid->node[3], uuid->node[4],
+               uuid->node[5]);
+
+       if (len != POOL_HDR_UUID_STR_LEN - 1) {
+               LOG(2, "snprintf(uuid): %d", len);
+               return -1;
+       }
+
+       return 0;
+}
+
+/*
+ * util_uuid_from_string -- generate a binary form of the uuid
+ *
+ * uuid string read from /proc/sys/kernel/random/uuid. UUID string
+ * format example:
+ * f81d4fae-7dec-11d0-a765-00a0c91e6bf6
+ */
+int
+util_uuid_from_string(const char *uuid, struct uuid *ud)
+{
+       if (strlen(uuid) != 36) {
+               LOG(2, "invalid uuid string");
+               return -1;
+       }
+
+       if (uuid[8] != '-' || uuid[13] != '-' || uuid[18] != '-' ||
+                       uuid[23] != '-') {
+               LOG(2, "invalid uuid string");
+               return -1;
+       }
+
+       int n = sscanf(uuid,
+               "%08x-%04hx-%04hx-%02hhx%02hhx-"
+               "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx",
+               &ud->time_low, &ud->time_mid, &ud->time_hi_and_ver,
+               &ud->clock_seq_hi, &ud->clock_seq_low, &ud->node[0],
+               &ud->node[1], &ud->node[2], &ud->node[3], &ud->node[4],
+               &ud->node[5]);
+
+       if (n != 11) {
+               LOG(2, "sscanf(uuid)");
+               return -1;
+       }
+
+       return 0;
+}