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