1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /* -*- mode: c; c-basic-offset: 8; -*-
3*4882a593Smuzhiyun * vim: noexpandtab sw=8 ts=8 sts=0:
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * userdlm.h
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Userspace dlm defines
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #ifndef USERDLM_H
14*4882a593Smuzhiyun #define USERDLM_H
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/fs.h>
18*4882a593Smuzhiyun #include <linux/types.h>
19*4882a593Smuzhiyun #include <linux/workqueue.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /* user_lock_res->l_flags flags. */
22*4882a593Smuzhiyun #define USER_LOCK_ATTACHED (0x00000001) /* we have initialized
23*4882a593Smuzhiyun * the lvb */
24*4882a593Smuzhiyun #define USER_LOCK_BUSY (0x00000002) /* we are currently in
25*4882a593Smuzhiyun * dlm_lock */
26*4882a593Smuzhiyun #define USER_LOCK_BLOCKED (0x00000004) /* blocked waiting to
27*4882a593Smuzhiyun * downconvert*/
28*4882a593Smuzhiyun #define USER_LOCK_IN_TEARDOWN (0x00000008) /* we're currently
29*4882a593Smuzhiyun * destroying this
30*4882a593Smuzhiyun * lock. */
31*4882a593Smuzhiyun #define USER_LOCK_QUEUED (0x00000010) /* lock is on the
32*4882a593Smuzhiyun * workqueue */
33*4882a593Smuzhiyun #define USER_LOCK_IN_CANCEL (0x00000020)
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun struct user_lock_res {
36*4882a593Smuzhiyun spinlock_t l_lock;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun int l_flags;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun #define USER_DLM_LOCK_ID_MAX_LEN 32
41*4882a593Smuzhiyun char l_name[USER_DLM_LOCK_ID_MAX_LEN];
42*4882a593Smuzhiyun int l_namelen;
43*4882a593Smuzhiyun int l_level;
44*4882a593Smuzhiyun unsigned int l_ro_holders;
45*4882a593Smuzhiyun unsigned int l_ex_holders;
46*4882a593Smuzhiyun struct ocfs2_dlm_lksb l_lksb;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun int l_requested;
49*4882a593Smuzhiyun int l_blocking;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun wait_queue_head_t l_event;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun struct work_struct l_work;
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun extern struct workqueue_struct *user_dlm_worker;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun void user_dlm_lock_res_init(struct user_lock_res *lockres,
59*4882a593Smuzhiyun struct dentry *dentry);
60*4882a593Smuzhiyun int user_dlm_destroy_lock(struct user_lock_res *lockres);
61*4882a593Smuzhiyun int user_dlm_cluster_lock(struct user_lock_res *lockres,
62*4882a593Smuzhiyun int level,
63*4882a593Smuzhiyun int lkm_flags);
64*4882a593Smuzhiyun void user_dlm_cluster_unlock(struct user_lock_res *lockres,
65*4882a593Smuzhiyun int level);
66*4882a593Smuzhiyun void user_dlm_write_lvb(struct inode *inode,
67*4882a593Smuzhiyun const char *val,
68*4882a593Smuzhiyun unsigned int len);
69*4882a593Smuzhiyun bool user_dlm_read_lvb(struct inode *inode, char *val);
70*4882a593Smuzhiyun struct ocfs2_cluster_connection *user_dlm_register(const struct qstr *name);
71*4882a593Smuzhiyun void user_dlm_unregister(struct ocfs2_cluster_connection *conn);
72*4882a593Smuzhiyun void user_dlm_set_locking_protocol(void);
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun struct dlmfs_inode_private {
75*4882a593Smuzhiyun struct ocfs2_cluster_connection *ip_conn;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun struct user_lock_res ip_lockres; /* unused for directories. */
78*4882a593Smuzhiyun struct inode *ip_parent;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun struct inode ip_vfs_inode;
81*4882a593Smuzhiyun };
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun static inline struct dlmfs_inode_private *
DLMFS_I(struct inode * inode)84*4882a593Smuzhiyun DLMFS_I(struct inode *inode)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun return container_of(inode,
87*4882a593Smuzhiyun struct dlmfs_inode_private,
88*4882a593Smuzhiyun ip_vfs_inode);
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun struct dlmfs_filp_private {
92*4882a593Smuzhiyun int fp_lock_level;
93*4882a593Smuzhiyun };
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun #define DLMFS_MAGIC 0x76a9f425
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun #endif /* USERDLM_H */
98