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 #define OCFS2_QINFO_LVB_VERSION 1 53 54 struct ocfs2_qinfo_lvb { 55 __u8 lvb_version; 56 __u8 lvb_reserved[3]; 57 __be32 lvb_bgrace; 58 __be32 lvb_igrace; 59 __be32 lvb_syncms; 60 __be32 lvb_blocks; 61 __be32 lvb_free_blk; 62 __be32 lvb_free_entry; 63 }; 64 65 /* ocfs2_inode_lock_full() 'arg_flags' flags */ 66 /* don't wait on recovery. */ 67 #define OCFS2_META_LOCK_RECOVERY (0x01) 68 /* Instruct the dlm not to queue ourselves on the other node. */ 69 #define OCFS2_META_LOCK_NOQUEUE (0x02) 70 /* don't block waiting for the downconvert thread, instead return -EAGAIN */ 71 #define OCFS2_LOCK_NONBLOCK (0x04) 72 73 int ocfs2_dlm_init(struct ocfs2_super *osb); 74 void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); 75 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); 76 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, 77 enum ocfs2_lock_type type, 78 unsigned int generation, 79 struct inode *inode); 80 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, 81 u64 parent, struct inode *inode); 82 struct ocfs2_file_private; 83 void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, 84 struct ocfs2_file_private *fp); 85 struct ocfs2_mem_dqinfo; 86 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, 87 struct ocfs2_mem_dqinfo *info); 88 void ocfs2_lock_res_free(struct ocfs2_lock_res *res); 89 int ocfs2_create_new_inode_locks(struct inode *inode); 90 int ocfs2_drop_inode_locks(struct inode *inode); 91 int ocfs2_rw_lock(struct inode *inode, int write); 92 void ocfs2_rw_unlock(struct inode *inode, int write); 93 int ocfs2_open_lock(struct inode *inode); 94 int ocfs2_try_open_lock(struct inode *inode, int write); 95 void ocfs2_open_unlock(struct inode *inode); 96 int ocfs2_inode_lock_atime(struct inode *inode, 97 struct vfsmount *vfsmnt, 98 int *level); 99 int ocfs2_inode_lock_full(struct inode *inode, 100 struct buffer_head **ret_bh, 101 int ex, 102 int arg_flags); 103 int ocfs2_inode_lock_with_page(struct inode *inode, 104 struct buffer_head **ret_bh, 105 int ex, 106 struct page *page); 107 /* 99% of the time we don't want to supply any additional flags -- 108 * those are for very specific cases only. */ 109 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0) 110 void ocfs2_inode_unlock(struct inode *inode, 111 int ex); 112 int ocfs2_super_lock(struct ocfs2_super *osb, 113 int ex); 114 void ocfs2_super_unlock(struct ocfs2_super *osb, 115 int ex); 116 int ocfs2_rename_lock(struct ocfs2_super *osb); 117 void ocfs2_rename_unlock(struct ocfs2_super *osb); 118 int ocfs2_dentry_lock(struct dentry *dentry, int ex); 119 void ocfs2_dentry_unlock(struct dentry *dentry, int ex); 120 int ocfs2_file_lock(struct file *file, int ex, int trylock); 121 void ocfs2_file_unlock(struct file *file); 122 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); 123 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); 124 125 126 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); 127 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, 128 struct ocfs2_lock_res *lockres); 129 130 /* for the downconvert thread */ 131 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); 132 133 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); 134 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); 135 136 /* To set the locking protocol on module initialization */ 137 void ocfs2_set_locking_protocol(void); 138 #endif /* DLMGLUE_H */ 139