Commit | Line | Data |
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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * dlmglue.h |
4 | * | |
5 | * description here | |
6 | * | |
7 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
8 | */ |
9 | ||
10 | ||
11 | #ifndef DLMGLUE_H | |
12 | #define DLMGLUE_H | |
13 | ||
d680efe9 MF |
14 | #include "dcache.h" |
15 | ||
15b1e36b | 16 | #define OCFS2_LVB_VERSION 5 |
ccd979bd MF |
17 | |
18 | struct ocfs2_meta_lvb { | |
4d3b83f7 | 19 | __u8 lvb_version; |
24c19ef4 | 20 | __u8 lvb_reserved0; |
15b1e36b | 21 | __be16 lvb_idynfeatures; |
ccd979bd MF |
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; | |
ca4d147e | 31 | __be32 lvb_iattr; |
f9e2d82e MF |
32 | __be32 lvb_igeneration; |
33 | __be32 lvb_reserved2; | |
ccd979bd MF |
34 | }; |
35 | ||
9e33d69f JK |
36 | #define OCFS2_QINFO_LVB_VERSION 1 |
37 | ||
38 | struct 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 | ||
83273932 SE |
49 | #define OCFS2_ORPHAN_LVB_VERSION 1 |
50 | ||
51 | struct ocfs2_orphan_scan_lvb { | |
52 | __u8 lvb_version; | |
53 | __u8 lvb_reserved[3]; | |
54 | __be32 lvb_os_seqno; | |
55 | }; | |
56 | ||
4882abeb GH |
57 | #define OCFS2_TRIMFS_LVB_VERSION 1 |
58 | ||
59 | struct 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 | ||
70 | struct ocfs2_trim_fs_info { | |
71 | u8 tf_valid; /* lvb is valid, or not */ | |
72 | u8 tf_success; /* trim is successful, or not */ | |
73 | u32 tf_nodenum; /* osb node number */ | |
74 | u64 tf_start; /* trim start offset in clusters */ | |
75 | u64 tf_len; /* trim end offset in clusters */ | |
76 | u64 tf_minlen; /* trim minimum contiguous free clusters */ | |
77 | u64 tf_trimlen; /* trimmed length in bytes */ | |
78 | }; | |
79 | ||
439a36b8 ER |
80 | struct ocfs2_lock_holder { |
81 | struct list_head oh_list; | |
82 | struct pid *oh_owner_pid; | |
133b81f2 | 83 | int oh_ex; |
439a36b8 ER |
84 | }; |
85 | ||
e63aecb6 | 86 | /* ocfs2_inode_lock_full() 'arg_flags' flags */ |
ccd979bd MF |
87 | /* don't wait on recovery. */ |
88 | #define OCFS2_META_LOCK_RECOVERY (0x01) | |
89 | /* Instruct the dlm not to queue ourselves on the other node. */ | |
90 | #define OCFS2_META_LOCK_NOQUEUE (0x02) | |
34d024f8 | 91 | /* don't block waiting for the downconvert thread, instead return -EAGAIN */ |
ccd979bd | 92 | #define OCFS2_LOCK_NONBLOCK (0x04) |
439a36b8 ER |
93 | /* just get back disk inode bh if we've got cluster lock. */ |
94 | #define OCFS2_META_LOCK_GETBH (0x08) | |
ccd979bd | 95 | |
cb25797d JK |
96 | /* Locking subclasses of inode cluster lock */ |
97 | enum { | |
98 | OI_LS_NORMAL = 0, | |
99 | OI_LS_PARENT, | |
100 | OI_LS_RENAME1, | |
101 | OI_LS_RENAME2, | |
07eaac94 | 102 | OI_LS_REFLINK_TARGET, |
cb25797d JK |
103 | }; |
104 | ||
ccd979bd | 105 | int ocfs2_dlm_init(struct ocfs2_super *osb); |
286eaa95 | 106 | void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); |
ccd979bd MF |
107 | void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); |
108 | void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, | |
109 | enum ocfs2_lock_type type, | |
24c19ef4 | 110 | unsigned int generation, |
ccd979bd | 111 | struct inode *inode); |
d680efe9 MF |
112 | void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, |
113 | u64 parent, struct inode *inode); | |
cf8e06f1 MF |
114 | struct ocfs2_file_private; |
115 | void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, | |
116 | struct ocfs2_file_private *fp); | |
9e33d69f JK |
117 | struct ocfs2_mem_dqinfo; |
118 | void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, | |
119 | struct ocfs2_mem_dqinfo *info); | |
8dec98ed TM |
120 | void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres, |
121 | struct ocfs2_super *osb, u64 ref_blkno, | |
122 | unsigned int generation); | |
ccd979bd MF |
123 | void ocfs2_lock_res_free(struct ocfs2_lock_res *res); |
124 | int ocfs2_create_new_inode_locks(struct inode *inode); | |
125 | int ocfs2_drop_inode_locks(struct inode *inode); | |
ccd979bd | 126 | int ocfs2_rw_lock(struct inode *inode, int write); |
06e7f13d | 127 | int ocfs2_try_rw_lock(struct inode *inode, int write); |
ccd979bd | 128 | void ocfs2_rw_unlock(struct inode *inode, int write); |
50008630 TY |
129 | int ocfs2_open_lock(struct inode *inode); |
130 | int ocfs2_try_open_lock(struct inode *inode, int write); | |
131 | void ocfs2_open_unlock(struct inode *inode); | |
e63aecb6 | 132 | int ocfs2_inode_lock_atime(struct inode *inode, |
7f1a37e3 | 133 | struct vfsmount *vfsmnt, |
c4c2416a | 134 | int *level, int wait); |
cb25797d | 135 | int ocfs2_inode_lock_full_nested(struct inode *inode, |
ccd979bd MF |
136 | struct buffer_head **ret_bh, |
137 | int ex, | |
cb25797d JK |
138 | int arg_flags, |
139 | int subclass); | |
e63aecb6 | 140 | int ocfs2_inode_lock_with_page(struct inode *inode, |
ccd979bd MF |
141 | struct buffer_head **ret_bh, |
142 | int ex, | |
143 | struct page *page); | |
cb25797d JK |
144 | /* Variants without special locking class or flags */ |
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) | |
ccd979bd MF |
149 | /* 99% of the time we don't want to supply any additional flags -- |
150 | * those are for very specific cases only. */ | |
cb25797d | 151 | #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL) |
06e7f13d GH |
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) | |
e63aecb6 | 155 | void ocfs2_inode_unlock(struct inode *inode, |
ccd979bd MF |
156 | int ex); |
157 | int ocfs2_super_lock(struct ocfs2_super *osb, | |
158 | int ex); | |
159 | void ocfs2_super_unlock(struct ocfs2_super *osb, | |
160 | int ex); | |
df152c24 SM |
161 | int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno); |
162 | void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno); | |
83273932 | 163 | |
ccd979bd MF |
164 | int ocfs2_rename_lock(struct ocfs2_super *osb); |
165 | void ocfs2_rename_unlock(struct ocfs2_super *osb); | |
6ca497a8 | 166 | int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex); |
167 | void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex); | |
4882abeb GH |
168 | void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb); |
169 | void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb); | |
170 | int ocfs2_trim_fs_lock(struct ocfs2_super *osb, | |
171 | struct ocfs2_trim_fs_info *info, int trylock); | |
172 | void ocfs2_trim_fs_unlock(struct ocfs2_super *osb, | |
173 | struct ocfs2_trim_fs_info *info); | |
d680efe9 MF |
174 | int ocfs2_dentry_lock(struct dentry *dentry, int ex); |
175 | void ocfs2_dentry_unlock(struct dentry *dentry, int ex); | |
cf8e06f1 MF |
176 | int ocfs2_file_lock(struct file *file, int ex, int trylock); |
177 | void ocfs2_file_unlock(struct file *file); | |
9e33d69f JK |
178 | int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); |
179 | void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); | |
8dec98ed TM |
180 | struct ocfs2_refcount_tree; |
181 | int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex); | |
182 | void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex); | |
9e33d69f | 183 | |
d680efe9 | 184 | |
84d86f83 JK |
185 | void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb, |
186 | struct ocfs2_lock_res *lockres); | |
d680efe9 MF |
187 | void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, |
188 | struct ocfs2_lock_res *lockres); | |
ccd979bd | 189 | |
34d024f8 | 190 | /* for the downconvert thread */ |
34d024f8 | 191 | void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); |
ccd979bd MF |
192 | |
193 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); | |
194 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); | |
195 | ||
63e0c48a JB |
196 | /* To set the locking protocol on module initialization */ |
197 | void ocfs2_set_locking_protocol(void); | |
439a36b8 ER |
198 | |
199 | /* The _tracker pair is used to avoid cluster recursive locking */ | |
200 | int ocfs2_inode_lock_tracker(struct inode *inode, | |
201 | struct buffer_head **ret_bh, | |
202 | int ex, | |
203 | struct ocfs2_lock_holder *oh); | |
204 | void ocfs2_inode_unlock_tracker(struct inode *inode, | |
205 | int ex, | |
206 | struct ocfs2_lock_holder *oh, | |
207 | int had_lock); | |
208 | ||
ccd979bd | 209 | #endif /* DLMGLUE_H */ |