diff options
Diffstat (limited to 'include/linux/uuid.h')
| -rw-r--r-- | include/linux/uuid.h | 99 |
1 files changed, 66 insertions, 33 deletions
diff --git a/include/linux/uuid.h b/include/linux/uuid.h index 4dff73a89758..d1defe4ab167 100644 --- a/include/linux/uuid.h +++ b/include/linux/uuid.h @@ -18,29 +18,16 @@ #include <uapi/linux/uuid.h> -/* - * V1 (time-based) UUID definition [RFC 4122]. - * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns - * increments since midnight 15th October 1582 - * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID - * time - * - the clock sequence is a 14-bit counter to avoid duplicate times - */ -struct uuid_v1 { - __be32 time_low; /* low part of timestamp */ - __be16 time_mid; /* mid part of timestamp */ - __be16 time_hi_and_version; /* high part of timestamp and version */ -#define UUID_TO_UNIX_TIME 0x01b21dd213814000ULL -#define UUID_TIMEHI_MASK 0x0fff -#define UUID_VERSION_TIME 0x1000 /* time-based UUID */ -#define UUID_VERSION_NAME 0x3000 /* name-based UUID */ -#define UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ - u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ -#define UUID_CLOCKHI_MASK 0x3f -#define UUID_VARIANT_STD 0x80 - u8 clock_seq_low; /* clock seq low */ - u8 node[6]; /* spatially unique node ID (MAC addr) */ -}; +typedef struct { + __u8 b[16]; +} uuid_t; + +#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) }}) /* * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee") @@ -48,27 +35,73 @@ struct uuid_v1 { */ #define UUID_STRING_LEN 36 -static inline int uuid_le_cmp(const uuid_le u1, const uuid_le u2) +extern const guid_t guid_null; +extern const uuid_t uuid_null; + +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 guid_is_null(const guid_t *guid) +{ + return guid_equal(guid, &guid_null); +} + +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) { - return memcmp(&u1, &u2, sizeof(uuid_le)); + memcpy(dst, src, sizeof(uuid_t)); } -static inline int uuid_be_cmp(const uuid_be u1, const uuid_be u2) +static inline bool uuid_is_null(const uuid_t *uuid) { - return memcmp(&u1, &u2, sizeof(uuid_be)); + return uuid_equal(uuid, &uuid_null); } 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 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) -int uuid_le_to_bin(const char *uuid, uuid_le *u); -int uuid_be_to_bin(const char *uuid, uuid_be *u); +#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 |