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uuid: rename uuid types

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Our "little endian" UUID really is a Wintel GUID, so rename it and its
helpers such (guid_t).  The big endian UUID is the only true one, so
give it the name uuid_t.  The uuid_le and uuid_be names are retained for
now, but will hopefully go away soon.  The exception to that are the _cmp
helpers that will be replaced by better primitives ASAP and thus don't
get the new names.

Also the _to_bin helpers are named to match the better named uuid_parse
routine in userspace.

Also remove the existing typedef in XFS that's now been superceeded by
the generic type name.

Signed-off-by: Christoph Hellwig <hch@lst.de>
[andy: also update the UUID_LE/UUID_BE macros including fallout]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2017-05-17 10:02:48 +02:00
parent 60927bc314
commit f9727a17db
6 changed files with 73 additions and 62 deletions
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55
include/linux/uuid.h
View file

@ -20,46 +20,55 @@
typedef struct {
__u8 b[16];
} uuid_be;
} uuid_t;
#define UUID_BE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
((uuid_be) \
#define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
((uuid_t) \
{{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \
((b) >> 8) & 0xff, (b) & 0xff, \
((c) >> 8) & 0xff, (c) & 0xff, \
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
#define NULL_UUID_BE \
UUID_BE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00)
/*
* 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)
{
return memcmp(&u1, &u2, sizeof(uuid_le));
}
static inline int uuid_be_cmp(const uuid_be u1, const uuid_be u2)
{
return memcmp(&u1, &u2, sizeof(uuid_be));
}
void generate_random_uuid(unsigned char uuid[16]);
extern void uuid_le_gen(uuid_le *u);
extern void uuid_be_gen(uuid_be *u);
extern void guid_gen(guid_t *u);
extern void uuid_gen(uuid_t *u);
bool __must_check uuid_is_valid(const char *uuid);
extern const u8 uuid_le_index[16];
extern const u8 uuid_be_index[16];
extern const u8 guid_index[16];
extern const u8 uuid_index[16];
int uuid_le_to_bin(const char *uuid, uuid_le *u);
int uuid_be_to_bin(const char *uuid, uuid_be *u);
int guid_parse(const char *uuid, guid_t *u);
int uuid_parse(const char *uuid, uuid_t *u);
/* backwards compatibility, don't use in new code */
typedef uuid_t uuid_be;
#define UUID_BE(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
UUID_INIT(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7)
#define NULL_UUID_BE \
UUID_BE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00)
#define uuid_le_gen(u) guid_gen(u)
#define uuid_be_gen(u) uuid_gen(u)
#define uuid_le_to_bin(guid, u) guid_parse(guid, u)
#define uuid_be_to_bin(uuid, u) uuid_parse(uuid, u)
static inline int uuid_le_cmp(const guid_t u1, const guid_t u2)
{
return memcmp(&u1, &u2, sizeof(guid_t));
}
static inline int uuid_be_cmp(const uuid_t u1, const uuid_t u2)
{
return memcmp(&u1, &u2, sizeof(uuid_t));
}
#endif