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 5 33 34 struct ocfs2_meta_lvb { 35 __u8 lvb_version; 36 __u8 lvb_reserved0; 37 __be16 lvb_idynfeatures; 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_inode_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 downconvert 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_rw_lock(struct inode *inode, int write); 73 void ocfs2_rw_unlock(struct inode *inode, int write); 74 int ocfs2_open_lock(struct inode *inode); 75 int ocfs2_try_open_lock(struct inode *inode, int write); 76 void ocfs2_open_unlock(struct inode *inode); 77 int ocfs2_inode_lock_atime(struct inode *inode, 78 struct vfsmount *vfsmnt, 79 int *level); 80 int ocfs2_inode_lock_full(struct inode *inode, 81 struct buffer_head **ret_bh, 82 int ex, 83 int arg_flags); 84 int ocfs2_inode_lock_with_page(struct inode *inode, 85 struct buffer_head **ret_bh, 86 int ex, 87 struct page *page); 88 /* 99% of the time we don't want to supply any additional flags -- 89 * those are for very specific cases only. */ 90 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0) 91 void ocfs2_inode_unlock(struct inode *inode, 92 int ex); 93 int ocfs2_super_lock(struct ocfs2_super *osb, 94 int ex); 95 void ocfs2_super_unlock(struct ocfs2_super *osb, 96 int ex); 97 int ocfs2_rename_lock(struct ocfs2_super *osb); 98 void ocfs2_rename_unlock(struct ocfs2_super *osb); 99 int ocfs2_dentry_lock(struct dentry *dentry, int ex); 100 void ocfs2_dentry_unlock(struct dentry *dentry, int ex); 101 102 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); 103 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, 104 struct ocfs2_lock_res *lockres); 105 106 /* for the downconvert thread */ 107 void ocfs2_process_blocked_lock(struct ocfs2_super *osb, 108 struct ocfs2_lock_res *lockres); 109 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); 110 111 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); 112 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); 113 114 #endif /* DLMGLUE_H */ 115