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| 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 | #define OCFS2_ORPHAN_LVB_VERSION 1 |
| 66 | |
| 67 | struct ocfs2_orphan_scan_lvb { |
| 68 | __u8 lvb_version; |
| 69 | __u8 lvb_reserved[3]; |
| 70 | __be32 lvb_os_seqno; |
| 71 | }; |
| 72 | |
| 73 | /* ocfs2_inode_lock_full() 'arg_flags' flags */ |
| 74 | /* don't wait on recovery. */ |
| 75 | #define OCFS2_META_LOCK_RECOVERY (0x01) |
| 76 | /* Instruct the dlm not to queue ourselves on the other node. */ |
| 77 | #define OCFS2_META_LOCK_NOQUEUE (0x02) |
| 78 | /* don't block waiting for the downconvert thread, instead return -EAGAIN */ |
| 79 | #define OCFS2_LOCK_NONBLOCK (0x04) |
| 80 | |
| 81 | /* Locking subclasses of inode cluster lock */ |
| 82 | enum { |
| 83 | OI_LS_NORMAL = 0, |
| 84 | OI_LS_PARENT, |
| 85 | OI_LS_RENAME1, |
| 86 | OI_LS_RENAME2, |
| 87 | OI_LS_REFLINK_TARGET, |
| 88 | }; |
| 89 | |
| 90 | int ocfs2_dlm_init(struct ocfs2_super *osb); |
| 91 | void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); |
| 92 | void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); |
| 93 | void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, |
| 94 | enum ocfs2_lock_type type, |
| 95 | unsigned int generation, |
| 96 | struct inode *inode); |
| 97 | void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, |
| 98 | u64 parent, struct inode *inode); |
| 99 | struct ocfs2_file_private; |
| 100 | void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, |
| 101 | struct ocfs2_file_private *fp); |
| 102 | struct ocfs2_mem_dqinfo; |
| 103 | void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, |
| 104 | struct ocfs2_mem_dqinfo *info); |
| 105 | void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres, |
| 106 | struct ocfs2_super *osb, u64 ref_blkno, |
| 107 | unsigned int generation); |
| 108 | void ocfs2_lock_res_free(struct ocfs2_lock_res *res); |
| 109 | int ocfs2_create_new_inode_locks(struct inode *inode); |
| 110 | int ocfs2_drop_inode_locks(struct inode *inode); |
| 111 | int ocfs2_rw_lock(struct inode *inode, int write); |
| 112 | void ocfs2_rw_unlock(struct inode *inode, int write); |
| 113 | int ocfs2_open_lock(struct inode *inode); |
| 114 | int ocfs2_try_open_lock(struct inode *inode, int write); |
| 115 | void ocfs2_open_unlock(struct inode *inode); |
| 116 | int ocfs2_inode_lock_atime(struct inode *inode, |
| 117 | struct vfsmount *vfsmnt, |
| 118 | int *level); |
| 119 | int ocfs2_inode_lock_full_nested(struct inode *inode, |
| 120 | struct buffer_head **ret_bh, |
| 121 | int ex, |
| 122 | int arg_flags, |
| 123 | int subclass); |
| 124 | int ocfs2_inode_lock_with_page(struct inode *inode, |
| 125 | struct buffer_head **ret_bh, |
| 126 | int ex, |
| 127 | struct page *page); |
| 128 | /* Variants without special locking class or flags */ |
| 129 | #define ocfs2_inode_lock_full(i, r, e, f)\ |
| 130 | ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL) |
| 131 | #define ocfs2_inode_lock_nested(i, b, e, s)\ |
| 132 | ocfs2_inode_lock_full_nested(i, b, e, 0, s) |
| 133 | /* 99% of the time we don't want to supply any additional flags -- |
| 134 | * those are for very specific cases only. */ |
| 135 | #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL) |
| 136 | void ocfs2_inode_unlock(struct inode *inode, |
| 137 | int ex); |
| 138 | int ocfs2_super_lock(struct ocfs2_super *osb, |
| 139 | int ex); |
| 140 | void ocfs2_super_unlock(struct ocfs2_super *osb, |
| 141 | int ex); |
| 142 | int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno); |
| 143 | void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno); |
| 144 | |
| 145 | int ocfs2_rename_lock(struct ocfs2_super *osb); |
| 146 | void ocfs2_rename_unlock(struct ocfs2_super *osb); |
| 147 | int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex); |
| 148 | void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex); |
| 149 | int ocfs2_dentry_lock(struct dentry *dentry, int ex); |
| 150 | void ocfs2_dentry_unlock(struct dentry *dentry, int ex); |
| 151 | int ocfs2_file_lock(struct file *file, int ex, int trylock); |
| 152 | void ocfs2_file_unlock(struct file *file); |
| 153 | int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); |
| 154 | void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); |
| 155 | struct ocfs2_refcount_tree; |
| 156 | int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex); |
| 157 | void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex); |
| 158 | |
| 159 | |
| 160 | void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); |
| 161 | void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, |
| 162 | struct ocfs2_lock_res *lockres); |
| 163 | |
| 164 | /* for the downconvert thread */ |
| 165 | void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); |
| 166 | |
| 167 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); |
| 168 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); |
| 169 | |
| 170 | /* To set the locking protocol on module initialization */ |
| 171 | void ocfs2_set_locking_protocol(void); |
| 172 | #endif /* DLMGLUE_H */ |
| 173 |
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Tags:
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od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
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