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13 #ifndef DLMGLUE_H
14 #define DLMGLUE_H
15
16 #include "dcache.h"
17
18 #define OCFS2_LVB_VERSION 5
19
20 struct ocfs2_meta_lvb {
21 __u8 lvb_version;
22 __u8 lvb_reserved0;
23 __be16 lvb_idynfeatures;
24 __be32 lvb_iclusters;
25 __be32 lvb_iuid;
26 __be32 lvb_igid;
27 __be64 lvb_iatime_packed;
28 __be64 lvb_ictime_packed;
29 __be64 lvb_imtime_packed;
30 __be64 lvb_isize;
31 __be16 lvb_imode;
32 __be16 lvb_inlink;
33 __be32 lvb_iattr;
34 __be32 lvb_igeneration;
35 __be32 lvb_reserved2;
36 };
37
38 #define OCFS2_QINFO_LVB_VERSION 1
39
40 struct ocfs2_qinfo_lvb {
41 __u8 lvb_version;
42 __u8 lvb_reserved[3];
43 __be32 lvb_bgrace;
44 __be32 lvb_igrace;
45 __be32 lvb_syncms;
46 __be32 lvb_blocks;
47 __be32 lvb_free_blk;
48 __be32 lvb_free_entry;
49 };
50
51 #define OCFS2_ORPHAN_LVB_VERSION 1
52
53 struct ocfs2_orphan_scan_lvb {
54 __u8 lvb_version;
55 __u8 lvb_reserved[3];
56 __be32 lvb_os_seqno;
57 };
58
59 #define OCFS2_TRIMFS_LVB_VERSION 1
60
61 struct ocfs2_trim_fs_lvb {
62 __u8 lvb_version;
63 __u8 lvb_success;
64 __u8 lvb_reserved[2];
65 __be32 lvb_nodenum;
66 __be64 lvb_start;
67 __be64 lvb_len;
68 __be64 lvb_minlen;
69 __be64 lvb_trimlen;
70 };
71
72 struct ocfs2_trim_fs_info {
73 u8 tf_valid;
74 u8 tf_success;
75 u32 tf_nodenum;
76 u64 tf_start;
77 u64 tf_len;
78 u64 tf_minlen;
79 u64 tf_trimlen;
80 };
81
82 struct ocfs2_lock_holder {
83 struct list_head oh_list;
84 struct pid *oh_owner_pid;
85 int oh_ex;
86 };
87
88
89
90 #define OCFS2_META_LOCK_RECOVERY (0x01)
91
92 #define OCFS2_META_LOCK_NOQUEUE (0x02)
93
94 #define OCFS2_LOCK_NONBLOCK (0x04)
95
96 #define OCFS2_META_LOCK_GETBH (0x08)
97
98
99 enum {
100 OI_LS_NORMAL = 0,
101 OI_LS_PARENT,
102 OI_LS_RENAME1,
103 OI_LS_RENAME2,
104 OI_LS_REFLINK_TARGET,
105 };
106
107 int ocfs2_dlm_init(struct ocfs2_super *osb);
108 void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
109 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
110 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
111 enum ocfs2_lock_type type,
112 unsigned int generation,
113 struct inode *inode);
114 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
115 u64 parent, struct inode *inode);
116 struct ocfs2_file_private;
117 void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
118 struct ocfs2_file_private *fp);
119 struct ocfs2_mem_dqinfo;
120 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
121 struct ocfs2_mem_dqinfo *info);
122 void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres,
123 struct ocfs2_super *osb, u64 ref_blkno,
124 unsigned int generation);
125 void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
126 int ocfs2_create_new_inode_locks(struct inode *inode);
127 int ocfs2_drop_inode_locks(struct inode *inode);
128 int ocfs2_rw_lock(struct inode *inode, int write);
129 int ocfs2_try_rw_lock(struct inode *inode, int write);
130 void ocfs2_rw_unlock(struct inode *inode, int write);
131 int ocfs2_open_lock(struct inode *inode);
132 int ocfs2_try_open_lock(struct inode *inode, int write);
133 void ocfs2_open_unlock(struct inode *inode);
134 int ocfs2_inode_lock_atime(struct inode *inode,
135 struct vfsmount *vfsmnt,
136 int *level, int wait);
137 int ocfs2_inode_lock_full_nested(struct inode *inode,
138 struct buffer_head **ret_bh,
139 int ex,
140 int arg_flags,
141 int subclass);
142 int ocfs2_inode_lock_with_page(struct inode *inode,
143 struct buffer_head **ret_bh,
144 int ex,
145 struct page *page);
146
147 #define ocfs2_inode_lock_full(i, r, e, f)\
148 ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL)
149 #define ocfs2_inode_lock_nested(i, b, e, s)\
150 ocfs2_inode_lock_full_nested(i, b, e, 0, s)
151
152
153 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL)
154 #define ocfs2_try_inode_lock(i, b, e)\
155 ocfs2_inode_lock_full_nested(i, b, e, OCFS2_META_LOCK_NOQUEUE,\
156 OI_LS_NORMAL)
157 void ocfs2_inode_unlock(struct inode *inode,
158 int ex);
159 int ocfs2_super_lock(struct ocfs2_super *osb,
160 int ex);
161 void ocfs2_super_unlock(struct ocfs2_super *osb,
162 int ex);
163 int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno);
164 void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno);
165
166 int ocfs2_rename_lock(struct ocfs2_super *osb);
167 void ocfs2_rename_unlock(struct ocfs2_super *osb);
168 int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
169 void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
170 void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb);
171 void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb);
172 int ocfs2_trim_fs_lock(struct ocfs2_super *osb,
173 struct ocfs2_trim_fs_info *info, int trylock);
174 void ocfs2_trim_fs_unlock(struct ocfs2_super *osb,
175 struct ocfs2_trim_fs_info *info);
176 int ocfs2_dentry_lock(struct dentry *dentry, int ex);
177 void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
178 int ocfs2_file_lock(struct file *file, int ex, int trylock);
179 void ocfs2_file_unlock(struct file *file);
180 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
181 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
182 struct ocfs2_refcount_tree;
183 int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex);
184 void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex);
185
186
187 void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
188 struct ocfs2_lock_res *lockres);
189 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
190 struct ocfs2_lock_res *lockres);
191
192
193 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
194
195 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
196 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
197
198
199 void ocfs2_set_locking_protocol(void);
200
201
202 int ocfs2_inode_lock_tracker(struct inode *inode,
203 struct buffer_head **ret_bh,
204 int ex,
205 struct ocfs2_lock_holder *oh);
206 void ocfs2_inode_unlock_tracker(struct inode *inode,
207 int ex,
208 struct ocfs2_lock_holder *oh,
209 int had_lock);
210
211 #endif