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