linux-kernel - [PATCH 08/22] uuid: hoist helpers uuid_equal() and uuid

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Date:   Sun, 28 May 2017 13:19:54 +0300
From:   Christoph Hellwig <hch@....de>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Amir Goldstein <amir73il@...il.com>,
        linux-fsdevel@...r.kernel.org
Cc:     Shaohua Li <shli@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        David Howells <dhowells@...hat.com>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        linux-xfs@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: [PATCH 08/22] uuid: hoist helpers uuid_equal() and uuid_copy() from xfs

These helper are used to compare and copy two uuid_t type objects.

Signed-off-by: Amir Goldstein <amir73il@...il.com>
[hch: also provide the respective guid_ versions]
Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 fs/xfs/uuid.c        |  6 ------
 fs/xfs/uuid.h        |  7 -------
 include/linux/uuid.h | 20 ++++++++++++++++++++
 lib/test_uuid.c      |  4 ++--
 4 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/fs/xfs/uuid.c b/fs/xfs/uuid.c
index b83f76b6d410..29ed78c8637b 100644
--- a/fs/xfs/uuid.c
+++ b/fs/xfs/uuid.c
@@ -55,9 +55,3 @@ uuid_is_nil(uuid_t *uuid)
 		if (*cp++) return 0;	/* not nil */
 	return 1;	/* is nil */
 }
-
-int
-uuid_equal(uuid_t *uuid1, uuid_t *uuid2)
-{
-	return memcmp(uuid1, uuid2, sizeof(uuid_t)) ? 0 : 1;
-}
diff --git a/fs/xfs/uuid.h b/fs/xfs/uuid.h
index 4f1441ba4fa5..86bbed071e79 100644
--- a/fs/xfs/uuid.h
+++ b/fs/xfs/uuid.h
@@ -19,13 +19,6 @@
 #define __XFS_SUPPORT_UUID_H__
 
 extern int uuid_is_nil(uuid_t *uuid);
-extern int uuid_equal(uuid_t *uuid1, uuid_t *uuid2);
 extern void uuid_getnodeuniq(uuid_t *uuid, int fsid [2]);
 
-static inline void
-uuid_copy(uuid_t *dst, uuid_t *src)
-{
-	memcpy(dst, src, sizeof(uuid_t));
-}
-
 #endif	/* __XFS_SUPPORT_UUID_H__ */
diff --git a/include/linux/uuid.h b/include/linux/uuid.h
index a9d0fdba5404..b4b147f52d6c 100644
--- a/include/linux/uuid.h
+++ b/include/linux/uuid.h
@@ -35,6 +35,26 @@ typedef struct {
  */
 #define	UUID_STRING_LEN		36
 
+static inline bool guid_equal(const guid_t *u1, const guid_t *u2)
+{
+	return memcmp(u1, u2, sizeof(guid_t)) == 0;
+}
+
+static inline void guid_copy(guid_t *dst, const guid_t *src)
+{
+	memcpy(dst, src, sizeof(guid_t));
+}
+
+static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2)
+{
+	return memcmp(u1, u2, sizeof(uuid_t)) == 0;
+}
+
+static inline void uuid_copy(uuid_t *dst, const uuid_t *src)
+{
+	memcpy(dst, src, sizeof(uuid_t));
+}
+
 void generate_random_uuid(unsigned char uuid[16]);
 
 extern void guid_gen(guid_t *u);
diff --git a/lib/test_uuid.c b/lib/test_uuid.c
index 9cad846fd805..4d05189e5f87 100644
--- a/lib/test_uuid.c
+++ b/lib/test_uuid.c
@@ -71,7 +71,7 @@ static void __init test_uuid_test(const struct test_uuid_data *data)
 		test_uuid_failed("conversion", false, false, data->uuid, NULL);
 
 	total_tests++;
-	if (uuid_le_cmp(data->le, le)) {
+	if (!guid_equal(&data->le, &le)) {
 		sprintf(buf, "%pUl", &le);
 		test_uuid_failed("cmp", false, false, data->uuid, buf);
 	}
@@ -82,7 +82,7 @@ static void __init test_uuid_test(const struct test_uuid_data *data)
 		test_uuid_failed("conversion", false, true, data->uuid, NULL);
 
 	total_tests++;
-	if (uuid_be_cmp(data->be, be)) {
+	if (uuid_equal(&data->be, &be)) {
 		sprintf(buf, "%pUb", &be);
 		test_uuid_failed("cmp", false, true, data->uuid, buf);
 	}
-- 
2.11.0