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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
20struct 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
40struct 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
53struct 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
61struct 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
72struct 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
82struct 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
99enum {
100 OI_LS_NORMAL = 0,
101 OI_LS_PARENT,
102 OI_LS_RENAME1,
103 OI_LS_RENAME2,
104 OI_LS_REFLINK_TARGET,
105};
106
107int ocfs2_dlm_init(struct ocfs2_super *osb);
108void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
109void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
110void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
111 enum ocfs2_lock_type type,
112 unsigned int generation,
113 struct inode *inode);
114void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
115 u64 parent, struct inode *inode);
116struct ocfs2_file_private;
117void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
118 struct ocfs2_file_private *fp);
119struct ocfs2_mem_dqinfo;
120void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
121 struct ocfs2_mem_dqinfo *info);
122void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres,
123 struct ocfs2_super *osb, u64 ref_blkno,
124 unsigned int generation);
125void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
126int ocfs2_create_new_inode_locks(struct inode *inode);
127int ocfs2_drop_inode_locks(struct inode *inode);
128int ocfs2_rw_lock(struct inode *inode, int write);
129int ocfs2_try_rw_lock(struct inode *inode, int write);
130void ocfs2_rw_unlock(struct inode *inode, int write);
131int ocfs2_open_lock(struct inode *inode);
132int ocfs2_try_open_lock(struct inode *inode, int write);
133void ocfs2_open_unlock(struct inode *inode);
134int ocfs2_inode_lock_atime(struct inode *inode,
135 struct vfsmount *vfsmnt,
136 int *level, int wait);
137int ocfs2_inode_lock_full_nested(struct inode *inode,
138 struct buffer_head **ret_bh,
139 int ex,
140 int arg_flags,
141 int subclass);
142int 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)
157void ocfs2_inode_unlock(struct inode *inode,
158 int ex);
159int ocfs2_super_lock(struct ocfs2_super *osb,
160 int ex);
161void ocfs2_super_unlock(struct ocfs2_super *osb,
162 int ex);
163int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno);
164void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno);
165
166int ocfs2_rename_lock(struct ocfs2_super *osb);
167void ocfs2_rename_unlock(struct ocfs2_super *osb);
168int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
169void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
170void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb);
171void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb);
172int ocfs2_trim_fs_lock(struct ocfs2_super *osb,
173 struct ocfs2_trim_fs_info *info, int trylock);
174void ocfs2_trim_fs_unlock(struct ocfs2_super *osb,
175 struct ocfs2_trim_fs_info *info);
176int ocfs2_dentry_lock(struct dentry *dentry, int ex);
177void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
178int ocfs2_file_lock(struct file *file, int ex, int trylock);
179void ocfs2_file_unlock(struct file *file);
180int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
181void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
182struct ocfs2_refcount_tree;
183int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex);
184void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex);
185
186
187void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
188 struct ocfs2_lock_res *lockres);
189void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
190 struct ocfs2_lock_res *lockres);
191
192
193void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
194
195struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
196void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
197
198
199void ocfs2_set_locking_protocol(void);
200
201
202int ocfs2_inode_lock_tracker(struct inode *inode,
203 struct buffer_head **ret_bh,
204 int ex,
205 struct ocfs2_lock_holder *oh);
206void ocfs2_inode_unlock_tracker(struct inode *inode,
207 int ex,
208 struct ocfs2_lock_holder *oh,
209 int had_lock);
210
211#endif
212
