| 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 | * dlmglue.h |
| 5 | * |
| 6 | * description here |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 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 | |
| 27 | #ifndef DLMGLUE_H |
| 28 | #define DLMGLUE_H |
| 29 | |
| 30 | #define OCFS2_LVB_VERSION 2 |
| 31 | |
| 32 | struct ocfs2_meta_lvb { |
| 33 | __be32 lvb_version; |
| 34 | __be32 lvb_iclusters; |
| 35 | __be32 lvb_iuid; |
| 36 | __be32 lvb_igid; |
| 37 | __be64 lvb_iatime_packed; |
| 38 | __be64 lvb_ictime_packed; |
| 39 | __be64 lvb_imtime_packed; |
| 40 | __be64 lvb_isize; |
| 41 | __be16 lvb_imode; |
| 42 | __be16 lvb_inlink; |
| 43 | __be32 lvb_reserved[3]; |
| 44 | }; |
| 45 | |
| 46 | /* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */ |
| 47 | /* don't wait on recovery. */ |
| 48 | #define OCFS2_META_LOCK_RECOVERY (0x01) |
| 49 | /* Instruct the dlm not to queue ourselves on the other node. */ |
| 50 | #define OCFS2_META_LOCK_NOQUEUE (0x02) |
| 51 | /* don't block waiting for the vote thread, instead return -EAGAIN */ |
| 52 | #define OCFS2_LOCK_NONBLOCK (0x04) |
| 53 | |
| 54 | int ocfs2_dlm_init(struct ocfs2_super *osb); |
| 55 | void ocfs2_dlm_shutdown(struct ocfs2_super *osb); |
| 56 | void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); |
| 57 | void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, |
| 58 | enum ocfs2_lock_type type, |
| 59 | struct inode *inode); |
| 60 | void ocfs2_lock_res_free(struct ocfs2_lock_res *res); |
| 61 | int ocfs2_create_new_inode_locks(struct inode *inode); |
| 62 | int ocfs2_drop_inode_locks(struct inode *inode); |
| 63 | int ocfs2_data_lock_full(struct inode *inode, |
| 64 | int write, |
| 65 | int arg_flags); |
| 66 | #define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0) |
| 67 | int ocfs2_data_lock_with_page(struct inode *inode, |
| 68 | int write, |
| 69 | struct page *page); |
| 70 | void ocfs2_data_unlock(struct inode *inode, |
| 71 | int write); |
| 72 | int ocfs2_rw_lock(struct inode *inode, int write); |
| 73 | void ocfs2_rw_unlock(struct inode *inode, int write); |
| 74 | int ocfs2_meta_lock_full(struct inode *inode, |
| 75 | struct ocfs2_journal_handle *handle, |
| 76 | struct buffer_head **ret_bh, |
| 77 | int ex, |
| 78 | int arg_flags); |
| 79 | int ocfs2_meta_lock_with_page(struct inode *inode, |
| 80 | struct ocfs2_journal_handle *handle, |
| 81 | struct buffer_head **ret_bh, |
| 82 | int ex, |
| 83 | struct page *page); |
| 84 | /* 99% of the time we don't want to supply any additional flags -- |
| 85 | * those are for very specific cases only. */ |
| 86 | #define ocfs2_meta_lock(i, h, b, e) ocfs2_meta_lock_full(i, h, b, e, 0) |
| 87 | void ocfs2_meta_unlock(struct inode *inode, |
| 88 | int ex); |
| 89 | int ocfs2_super_lock(struct ocfs2_super *osb, |
| 90 | int ex); |
| 91 | void ocfs2_super_unlock(struct ocfs2_super *osb, |
| 92 | int ex); |
| 93 | int ocfs2_rename_lock(struct ocfs2_super *osb); |
| 94 | void ocfs2_rename_unlock(struct ocfs2_super *osb); |
| 95 | void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); |
| 96 | |
| 97 | /* for the vote thread */ |
| 98 | void ocfs2_process_blocked_lock(struct ocfs2_super *osb, |
| 99 | struct ocfs2_lock_res *lockres); |
| 100 | |
| 101 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); |
| 102 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); |
| 103 | |
| 104 | /* aids in debugging and tracking lvbs */ |
| 105 | void ocfs2_dump_meta_lvb_info(u64 level, |
| 106 | const char *function, |
| 107 | unsigned int line, |
| 108 | struct ocfs2_lock_res *lockres); |
| 109 | #define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres) |
| 110 | |
| 111 | #endif /* DLMGLUE_H */ |