From: Corey Minyard <cminy...@mvista.com>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Signed-off-by: Corey Minyard <cminy...@mvista.com>
---
include/linux/uuid.h | 7 +++++++
lib/uuid.c | 28 ++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/include/linux/uuid.h b/include/linux/uuid.h
index 33b0bdb..ab8ce39 100644
--- a/include/linux/uuid.h
+++ b/include/linux/uuid.h
@@ -83,6 +83,13 @@ extern const u8 uuid_index[16];
int guid_parse(const char *uuid, guid_t *u);
int uuid_parse(const char *uuid, uuid_t *u);
+/*
+ * Returns the number of bytes put into the string, not including the
+ * terminating null byte.
+ */
+int guid_to_str(char *str, unsigned int len, const guid_t *guid);
+int uuid_to_str(char *str, unsigned int len, const uuid_t *uuid);
+
/* backwards compatibility, don't use in new code */
#define uuid_le_gen(u) guid_gen(u)
#define uuid_le_to_bin(guid, u) guid_parse(guid, u)
diff --git a/lib/uuid.c b/lib/uuid.c
index 680b9fb..0ea6dd9 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -129,3 +129,31 @@ int uuid_parse(const char *uuid, uuid_t *u)
return __uuid_parse(uuid, u->b, uuid_index);
}
EXPORT_SYMBOL(uuid_parse);
+
+static int __uuid_to_str(char *str, unsigned int len, const __u8 b[16],
+ const u8 ei[16])
+{
+ unsigned int rv;
+
+ rv = snprintf(str, len,
+
"%2.2x%2.2x%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x",
+ b[ei[0]], b[ei[1]], b[ei[2]], b[ei[3]],
+ b[ei[4]], b[ei[5]], b[ei[6]], b[ei[7]],
+ b[ei[8]], b[ei[9]], b[ei[10]], b[ei[11]],
+ b[ei[12]], b[ei[13]], b[ei[14]], b[ei[15]]);
+ if (rv >= len)
+ rv = len - 1;
+ return rv;
+}
+
+int guid_to_str(char *str, unsigned int len, const guid_t *guid)
+{
+ return __uuid_to_str(str, len, guid->b, guid_index);
+}
+EXPORT_SYMBOL(guid_to_str);
+
+int uuid_to_str(char *str, unsigned int len, const uuid_t *uuid)
+{
+ return __uuid_to_str(str, len, uuid->b, uuid_index);
+}
+EXPORT_SYMBOL(uuid_to_str);
--
2.7.4
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