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f9727a17db
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>
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/*
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* UUID/GUID definition
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*
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* Copyright (C) 2010, 2016 Intel Corp.
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* Huang Ying <ying.huang@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _LINUX_UUID_H_
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#define _LINUX_UUID_H_
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#include <uapi/linux/uuid.h>
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typedef struct {
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__u8 b[16];
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} uuid_t;
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#define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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((uuid_t) \
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{{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \
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((b) >> 8) & 0xff, (b) & 0xff, \
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((c) >> 8) & 0xff, (c) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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/*
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* The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")
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* not including trailing NUL.
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*/
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#define UUID_STRING_LEN 36
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void generate_random_uuid(unsigned char uuid[16]);
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extern void guid_gen(guid_t *u);
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extern void uuid_gen(uuid_t *u);
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bool __must_check uuid_is_valid(const char *uuid);
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extern const u8 guid_index[16];
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extern const u8 uuid_index[16];
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int guid_parse(const char *uuid, guid_t *u);
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int uuid_parse(const char *uuid, uuid_t *u);
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/* backwards compatibility, don't use in new code */
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typedef uuid_t uuid_be;
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#define UUID_BE(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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UUID_INIT(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7)
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#define NULL_UUID_BE \
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UUID_BE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00)
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#define uuid_le_gen(u) guid_gen(u)
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#define uuid_be_gen(u) uuid_gen(u)
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#define uuid_le_to_bin(guid, u) guid_parse(guid, u)
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#define uuid_be_to_bin(uuid, u) uuid_parse(uuid, u)
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static inline int uuid_le_cmp(const guid_t u1, const guid_t u2)
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{
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return memcmp(&u1, &u2, sizeof(guid_t));
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}
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static inline int uuid_be_cmp(const uuid_t u1, const uuid_t u2)
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{
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return memcmp(&u1, &u2, sizeof(uuid_t));
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}
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#endif
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