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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
ccd979bd MF |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * dlmglue.h | |
6 | * | |
7 | * description here | |
8 | * | |
9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
12 | ||
13 | #ifndef DLMGLUE_H | |
14 | #define DLMGLUE_H | |
15 | ||
d680efe9 MF |
16 | #include "dcache.h" |
17 | ||
15b1e36b | 18 | #define OCFS2_LVB_VERSION 5 |
ccd979bd MF |
19 | |
20 | struct ocfs2_meta_lvb { | |
4d3b83f7 | 21 | __u8 lvb_version; |
24c19ef4 | 22 | __u8 lvb_reserved0; |
15b1e36b | 23 | __be16 lvb_idynfeatures; |
ccd979bd MF |
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; | |
ca4d147e | 33 | __be32 lvb_iattr; |
f9e2d82e MF |
34 | __be32 lvb_igeneration; |
35 | __be32 lvb_reserved2; | |
ccd979bd MF |
36 | }; |
37 | ||
9e33d69f JK |
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 | ||
83273932 SE |
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 | ||
4882abeb GH |
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; /* lvb is valid, or not */ | |
74 | u8 tf_success; /* trim is successful, or not */ | |
75 | u32 tf_nodenum; /* osb node number */ | |
76 | u64 tf_start; /* trim start offset in clusters */ | |
77 | u64 tf_len; /* trim end offset in clusters */ | |
78 | u64 tf_minlen; /* trim minimum contiguous free clusters */ | |
79 | u64 tf_trimlen; /* trimmed length in bytes */ | |
80 | }; | |
81 | ||
439a36b8 ER |
82 | struct ocfs2_lock_holder { |
83 | struct list_head oh_list; | |
84 | struct pid *oh_owner_pid; | |
133b81f2 | 85 | int oh_ex; |
439a36b8 ER |
86 | }; |
87 | ||
e63aecb6 | 88 | /* ocfs2_inode_lock_full() 'arg_flags' flags */ |
ccd979bd MF |
89 | /* don't wait on recovery. */ |
90 | #define OCFS2_META_LOCK_RECOVERY (0x01) | |
91 | /* Instruct the dlm not to queue ourselves on the other node. */ | |
92 | #define OCFS2_META_LOCK_NOQUEUE (0x02) | |
34d024f8 | 93 | /* don't block waiting for the downconvert thread, instead return -EAGAIN */ |
ccd979bd | 94 | #define OCFS2_LOCK_NONBLOCK (0x04) |
439a36b8 ER |
95 | /* just get back disk inode bh if we've got cluster lock. */ |
96 | #define OCFS2_META_LOCK_GETBH (0x08) | |
ccd979bd | 97 | |
cb25797d JK |
98 | /* Locking subclasses of inode cluster lock */ |
99 | enum { | |
100 | OI_LS_NORMAL = 0, | |
101 | OI_LS_PARENT, | |
102 | OI_LS_RENAME1, | |
103 | OI_LS_RENAME2, | |
07eaac94 | 104 | OI_LS_REFLINK_TARGET, |
cb25797d JK |
105 | }; |
106 | ||
ccd979bd | 107 | int ocfs2_dlm_init(struct ocfs2_super *osb); |
286eaa95 | 108 | void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); |
ccd979bd MF |
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, | |
24c19ef4 | 112 | unsigned int generation, |
ccd979bd | 113 | struct inode *inode); |
d680efe9 MF |
114 | void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, |
115 | u64 parent, struct inode *inode); | |
cf8e06f1 MF |
116 | struct ocfs2_file_private; |
117 | void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, | |
118 | struct ocfs2_file_private *fp); | |
9e33d69f JK |
119 | struct ocfs2_mem_dqinfo; |
120 | void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, | |
121 | struct ocfs2_mem_dqinfo *info); | |
8dec98ed TM |
122 | void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres, |
123 | struct ocfs2_super *osb, u64 ref_blkno, | |
124 | unsigned int generation); | |
ccd979bd MF |
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); | |
ccd979bd | 128 | int ocfs2_rw_lock(struct inode *inode, int write); |
06e7f13d | 129 | int ocfs2_try_rw_lock(struct inode *inode, int write); |
ccd979bd | 130 | void ocfs2_rw_unlock(struct inode *inode, int write); |
50008630 TY |
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); | |
e63aecb6 | 134 | int ocfs2_inode_lock_atime(struct inode *inode, |
7f1a37e3 | 135 | struct vfsmount *vfsmnt, |
c4c2416a | 136 | int *level, int wait); |
cb25797d | 137 | int ocfs2_inode_lock_full_nested(struct inode *inode, |
ccd979bd MF |
138 | struct buffer_head **ret_bh, |
139 | int ex, | |
cb25797d JK |
140 | int arg_flags, |
141 | int subclass); | |
e63aecb6 | 142 | int ocfs2_inode_lock_with_page(struct inode *inode, |
ccd979bd MF |
143 | struct buffer_head **ret_bh, |
144 | int ex, | |
145 | struct page *page); | |
cb25797d JK |
146 | /* Variants without special locking class or flags */ |
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) | |
ccd979bd MF |
151 | /* 99% of the time we don't want to supply any additional flags -- |
152 | * those are for very specific cases only. */ | |
cb25797d | 153 | #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL) |
06e7f13d GH |
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) | |
e63aecb6 | 157 | void ocfs2_inode_unlock(struct inode *inode, |
ccd979bd MF |
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); | |
df152c24 SM |
163 | int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno); |
164 | void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno); | |
83273932 | 165 | |
ccd979bd MF |
166 | int ocfs2_rename_lock(struct ocfs2_super *osb); |
167 | void ocfs2_rename_unlock(struct ocfs2_super *osb); | |
6ca497a8 | 168 | int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex); |
169 | void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex); | |
4882abeb GH |
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); | |
d680efe9 MF |
176 | int ocfs2_dentry_lock(struct dentry *dentry, int ex); |
177 | void ocfs2_dentry_unlock(struct dentry *dentry, int ex); | |
cf8e06f1 MF |
178 | int ocfs2_file_lock(struct file *file, int ex, int trylock); |
179 | void ocfs2_file_unlock(struct file *file); | |
9e33d69f JK |
180 | int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); |
181 | void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); | |
8dec98ed TM |
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); | |
9e33d69f | 185 | |
d680efe9 | 186 | |
84d86f83 JK |
187 | void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb, |
188 | struct ocfs2_lock_res *lockres); | |
d680efe9 MF |
189 | void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, |
190 | struct ocfs2_lock_res *lockres); | |
ccd979bd | 191 | |
34d024f8 | 192 | /* for the downconvert thread */ |
34d024f8 | 193 | void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); |
ccd979bd MF |
194 | |
195 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); | |
196 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); | |
197 | ||
63e0c48a JB |
198 | /* To set the locking protocol on module initialization */ |
199 | void ocfs2_set_locking_protocol(void); | |
439a36b8 ER |
200 | |
201 | /* The _tracker pair is used to avoid cluster recursive locking */ | |
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 | ||
ccd979bd | 211 | #endif /* DLMGLUE_H */ |