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lib/uuid.c: introduce a few more generic helpers

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There are new helpers in this patch:

  uuid_is_valid		checks if a UUID is valid
  uuid_be_to_bin	converts from string to binary (big endian)
  uuid_le_to_bin	converts from string to binary (little endian)

They will be used in future, i.e. in the following patches in the series.

This also moves the indices arrays to lib/uuid.c to be shared accross
modules.

[andriy.shevchenko@linux.intel.com: fix typo]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andy Shevchenko 2016-05-20 17:01:04 -07:00 • committed by Linus Torvalds
parent 8da4b8c48e
commit 2b1b0d6670
3 changed files with 82 additions and 5 deletions
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13
include/linux/uuid.h
View file

@ -22,6 +22,11 @@
#include <uapi/linux/uuid.h>
/*
* The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")
* not including trailing NUL.
*/
#define UUID_STRING_LEN 36
static inline int uuid_le_cmp(const uuid_le u1, const uuid_le u2)
{
@ -38,4 +43,12 @@ void generate_random_uuid(unsigned char uuid[16]);
extern void uuid_le_gen(uuid_le *u);
extern void uuid_be_gen(uuid_be *u);
bool __must_check uuid_is_valid(const char *uuid);
extern const u8 uuid_le_index[16];
extern const u8 uuid_be_index[16];
int uuid_le_to_bin(const char *uuid, uuid_le *u);
int uuid_be_to_bin(const char *uuid, uuid_be *u);
#endif