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 #include "dcache.h" 31 32 #define OCFS2_LVB_VERSION 4 33 34 struct ocfs2_meta_lvb { 35 __u8 lvb_version; 36 __u8 lvb_reserved0; 37 __be16 lvb_reserved1; 38 __be32 lvb_iclusters; 39 __be32 lvb_iuid; 40 __be32 lvb_igid; 41 __be64 lvb_iatime_packed; 42 __be64 lvb_ictime_packed; 43 __be64 lvb_imtime_packed; 44 __be64 lvb_isize; 45 __be16 lvb_imode; 46 __be16 lvb_inlink; 47 __be32 lvb_iattr; 48 __be32 lvb_igeneration; 49 __be32 lvb_reserved2; 50 }; 51 52 /* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */ 53 /* don't wait on recovery. */ 54 #define OCFS2_META_LOCK_RECOVERY (0x01) 55 /* Instruct the dlm not to queue ourselves on the other node. */ 56 #define OCFS2_META_LOCK_NOQUEUE (0x02) 57 /* don't block waiting for the vote thread, instead return -EAGAIN */ 58 #define OCFS2_LOCK_NONBLOCK (0x04) 59 60 int ocfs2_dlm_init(struct ocfs2_super *osb); 61 void ocfs2_dlm_shutdown(struct ocfs2_super *osb); 62 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); 63 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, 64 enum ocfs2_lock_type type, 65 unsigned int generation, 66 struct inode *inode); 67 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, 68 u64 parent, struct inode *inode); 69 void ocfs2_lock_res_free(struct ocfs2_lock_res *res); 70 int ocfs2_create_new_inode_locks(struct inode *inode); 71 int ocfs2_drop_inode_locks(struct inode *inode); 72 int ocfs2_data_lock_full(struct inode *inode, 73 int write, 74 int arg_flags); 75 #define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0) 76 int ocfs2_data_lock_with_page(struct inode *inode, 77 int write, 78 struct page *page); 79 void ocfs2_data_unlock(struct inode *inode, 80 int write); 81 int ocfs2_rw_lock(struct inode *inode, int write); 82 void ocfs2_rw_unlock(struct inode *inode, int write); 83 int ocfs2_open_lock(struct inode *inode); 84 int ocfs2_try_open_lock(struct inode *inode, int write); 85 void ocfs2_open_unlock(struct inode *inode); 86 int ocfs2_meta_lock_atime(struct inode *inode, 87 struct vfsmount *vfsmnt, 88 int *level); 89 int ocfs2_meta_lock_full(struct inode *inode, 90 struct buffer_head **ret_bh, 91 int ex, 92 int arg_flags); 93 int ocfs2_meta_lock_with_page(struct inode *inode, 94 struct buffer_head **ret_bh, 95 int ex, 96 struct page *page); 97 /* 99% of the time we don't want to supply any additional flags -- 98 * those are for very specific cases only. */ 99 #define ocfs2_meta_lock(i, b, e) ocfs2_meta_lock_full(i, b, e, 0) 100 void ocfs2_meta_unlock(struct inode *inode, 101 int ex); 102 int ocfs2_super_lock(struct ocfs2_super *osb, 103 int ex); 104 void ocfs2_super_unlock(struct ocfs2_super *osb, 105 int ex); 106 int ocfs2_rename_lock(struct ocfs2_super *osb); 107 void ocfs2_rename_unlock(struct ocfs2_super *osb); 108 int ocfs2_dentry_lock(struct dentry *dentry, int ex); 109 void ocfs2_dentry_unlock(struct dentry *dentry, int ex); 110 111 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); 112 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, 113 struct ocfs2_lock_res *lockres); 114 115 /* for the vote thread */ 116 void ocfs2_process_blocked_lock(struct ocfs2_super *osb, 117 struct ocfs2_lock_res *lockres); 118 119 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); 120 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); 121 122 /* aids in debugging and tracking lvbs */ 123 void ocfs2_dump_meta_lvb_info(u64 level, 124 const char *function, 125 unsigned int line, 126 struct ocfs2_lock_res *lockres); 127 #define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres) 128 129 #endif /* DLMGLUE_H */ 130