projects / mirror_ubuntu-hirsute-kernel.git / blame
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|---|---|---|
| 8df08c89 MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
| 3 | * | |
| 4 | * userdlm.h | |
| 5 | * | |
| 6 | * Userspace dlm defines | |
| 7 | * | |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU General Public | |
| 12 | * License as published by the Free Software Foundation; either | |
| 13 | * version 2 of the License, or (at your option) any later version. | |
| 14 | * | |
| 15 | * This program is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 | * General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU General Public | |
| 21 | * License along with this program; if not, write to the | |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 23 | * Boston, MA 021110-1307, USA. | |
| 24 | */ | |
| 25 | ||
| 26 | ||
| 27 | #ifndef USERDLM_H | |
| 28 | #define USERDLM_H | |
| 29 | ||
| 30 | #include <linux/module.h> | |
| 31 | #include <linux/fs.h> | |
| 32 | #include <linux/types.h> | |
| 33 | #include <linux/workqueue.h> | |
| 34 | ||
| 35 | /* user_lock_res->l_flags flags. */ | |
| 36 | #define USER_LOCK_ATTACHED (0x00000001) /* have we initialized | |
| 37 | * the lvb */ | |
| 38 | #define USER_LOCK_BUSY (0x00000002) /* we are currently in | |
| 39 | * dlm_lock */ | |
| 40 | #define USER_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
| 41 | * downconvert*/ | |
| 42 | #define USER_LOCK_IN_TEARDOWN (0x00000008) /* we're currently | |
| 43 | * destroying this | |
| 44 | * lock. */ | |
| 45 | #define USER_LOCK_QUEUED (0x00000010) /* lock is on the | |
| 46 | * workqueue */ | |
| 47 | #define USER_LOCK_IN_CANCEL (0x00000020) | |
| 48 | ||
| 49 | struct user_lock_res { | |
| 50 | spinlock_t l_lock; | |
| 51 | ||
| 52 | int l_flags; | |
| 53 | ||
| 54 | #define USER_DLM_LOCK_ID_MAX_LEN 32 | |
| 55 | char l_name[USER_DLM_LOCK_ID_MAX_LEN]; | |
| 56 | int l_level; | |
| 57 | unsigned int l_ro_holders; | |
| 58 | unsigned int l_ex_holders; | |
| 59 | struct dlm_lockstatus l_lksb; | |
| 60 | ||
| 61 | int l_requested; | |
| 62 | int l_blocking; | |
| 63 | ||
| 64 | wait_queue_head_t l_event; | |
| 65 | ||
| 66 | struct work_struct l_work; | |
| 67 | }; | |
| 68 | ||
| 69 | extern struct workqueue_struct *user_dlm_worker; | |
| 70 | ||
| 71 | void user_dlm_lock_res_init(struct user_lock_res *lockres, | |
| 72 | struct dentry *dentry); | |
| 73 | int user_dlm_destroy_lock(struct user_lock_res *lockres); | |
| 74 | int user_dlm_cluster_lock(struct user_lock_res *lockres, | |
| 75 | int level, | |
| 76 | int lkm_flags); | |
| 77 | void user_dlm_cluster_unlock(struct user_lock_res *lockres, | |
| 78 | int level); | |
| 79 | void user_dlm_write_lvb(struct inode *inode, | |
| 80 | const char *val, | |
| 81 | unsigned int len); | |
| 82 | void user_dlm_read_lvb(struct inode *inode, | |
| 83 | char *val, | |
| 84 | unsigned int len); | |
| 85 | struct dlm_ctxt *user_dlm_register_context(struct qstr *name); | |
| 86 | void user_dlm_unregister_context(struct dlm_ctxt *dlm); | |
| 87 | ||
| 88 | struct dlmfs_inode_private { | |
| 89 | struct dlm_ctxt *ip_dlm; | |
| 90 | ||
| 91 | struct user_lock_res ip_lockres; /* unused for directories. */ | |
| 92 | struct inode *ip_parent; | |
| 93 | ||
| 94 | struct inode ip_vfs_inode; | |
| 95 | }; | |
| 96 | ||
| 97 | static inline struct dlmfs_inode_private * | |
| 98 | DLMFS_I(struct inode *inode) | |
| 99 | { | |
| 100 | return container_of(inode, | |
| 101 | struct dlmfs_inode_private, | |
| 102 | ip_vfs_inode); | |
| 103 | } | |
| 104 | ||
| 105 | struct dlmfs_filp_private { | |
| 106 | int fp_lock_level; | |
| 107 | }; | |
| 108 | ||
| 109 | #define DLMFS_MAGIC 0x76a9f425 | |
| 110 | ||
| 111 | #endif /* USERDLM_H */ |