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 */ 112