projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, | |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 1da177e4 | 17 | */ |
| 1da177e4 LT |
18 | #include <xfs.h> |
| 19 | ||
| 794fe2dc CH |
20 | /* IRIX interpretation of an uuid_t */ |
| 21 | typedef struct { | |
| 22 | __be32 uu_timelow; | |
| 23 | __be16 uu_timemid; | |
| 24 | __be16 uu_timehi; | |
| 25 | __be16 uu_clockseq; | |
| 26 | __be16 uu_node[3]; | |
| 27 | } xfs_uu_t; | |
| 28 | ||
| 1da177e4 LT |
29 | /* |
| 30 | * uuid_getnodeuniq - obtain the node unique fields of a UUID. | |
| 31 | * | |
| 32 | * This is not in any way a standard or condoned UUID function; | |
| 33 | * it just something that's needed for user-level file handles. | |
| 34 | */ | |
| 35 | void | |
| 36 | uuid_getnodeuniq(uuid_t *uuid, int fsid [2]) | |
| 37 | { | |
| 794fe2dc | 38 | xfs_uu_t *uup = (xfs_uu_t *)uuid; |
| 1da177e4 | 39 | |
| 794fe2dc CH |
40 | fsid[0] = (be16_to_cpu(uup->uu_clockseq) << 16) | |
| 41 | be16_to_cpu(uup->uu_timemid); | |
| a780143e | 42 | fsid[1] = be32_to_cpu(uup->uu_timelow); |
| 1da177e4 LT |
43 | } |
| 44 | ||
| 1da177e4 LT |
45 | int |
| 46 | uuid_is_nil(uuid_t *uuid) | |
| 47 | { | |
| 48 | int i; | |
| 49 | char *cp = (char *)uuid; | |
| 50 | ||
| 51 | if (uuid == NULL) | |
| 52 | return 0; | |
| 53 | /* implied check of version number here... */ | |
| 54 | for (i = 0; i < sizeof *uuid; i++) | |
| 55 | if (*cp++) return 0; /* not nil */ | |
| 56 | return 1; /* is nil */ | |
| 57 | } | |
| 58 | ||
| 59 | int | |
| 60 | uuid_equal(uuid_t *uuid1, uuid_t *uuid2) | |
| 61 | { | |
| 62 | return memcmp(uuid1, uuid2, sizeof(uuid_t)) ? 0 : 1; | |
| 63 | } |