| Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * ocfs2_lockid.h |
| 5 | * |
| 6 | * Defines OCFS2 lockid bits. |
| 7 | * |
| 8 | * Copyright (C) 2002, 2005 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #ifndef OCFS2_LOCKID_H |
| 27 | #define OCFS2_LOCKID_H |
| 28 | |
| 29 | /* lock ids are made up in the following manner: |
| 30 | * name[0] --> type |
| 31 | * name[1-6] --> 6 pad characters, reserved for now |
| 32 | * name[7-22] --> block number, expressed in hex as 16 chars |
| 33 | * name[23-30] --> i_generation, expressed in hex 8 chars |
| 34 | * name[31] --> '\0' */ |
| 35 | #define OCFS2_LOCK_ID_MAX_LEN 32 |
| 36 | #define OCFS2_LOCK_ID_PAD "000000" |
| 37 | |
| 38 | enum ocfs2_lock_type { |
| 39 | OCFS2_LOCK_TYPE_META = 0, |
| 40 | OCFS2_LOCK_TYPE_DATA, |
| 41 | OCFS2_LOCK_TYPE_SUPER, |
| 42 | OCFS2_LOCK_TYPE_RENAME, |
| 43 | OCFS2_LOCK_TYPE_RW, |
| 44 | OCFS2_NUM_LOCK_TYPES |
| 45 | }; |
| 46 | |
| 47 | static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type) |
| 48 | { |
| 49 | char c; |
| 50 | switch (type) { |
| 51 | case OCFS2_LOCK_TYPE_META: |
| 52 | c = 'M'; |
| 53 | break; |
| 54 | case OCFS2_LOCK_TYPE_DATA: |
| 55 | c = 'D'; |
| 56 | break; |
| 57 | case OCFS2_LOCK_TYPE_SUPER: |
| 58 | c = 'S'; |
| 59 | break; |
| 60 | case OCFS2_LOCK_TYPE_RENAME: |
| 61 | c = 'R'; |
| 62 | break; |
| 63 | case OCFS2_LOCK_TYPE_RW: |
| 64 | c = 'W'; |
| 65 | break; |
| 66 | default: |
| 67 | c = '\0'; |
| 68 | } |
| 69 | |
| 70 | return c; |
| 71 | } |
| 72 | |
| 73 | #endif /* OCFS2_LOCKID_H */ |