114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
|
/* -*- mode: c; c-basic-offset: 8; -*-
|
||
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
||
|
|
*
|
||
|
|
* userdlm.h
|
||
|
|
*
|
||
|
|
* Userspace dlm defines
|
||
|
|
*
|
||
|
|
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public
|
||
|
|
* License along with this program; if not, write to the
|
||
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
* Boston, MA 021110-1307, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef USERDLM_H
|
||
|
|
#define USERDLM_H
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/workqueue.h>
|
||
|
|
|
||
|
|
/* user_lock_res->l_flags flags. */
|
||
|
|
#define USER_LOCK_ATTACHED (0x00000001) /* we have initialized
|
||
|
|
* the lvb */
|
||
|
|
#define USER_LOCK_BUSY (0x00000002) /* we are currently in
|
||
|
|
* dlm_lock */
|
||
|
|
#define USER_LOCK_BLOCKED (0x00000004) /* blocked waiting to
|
||
|
|
* downconvert*/
|
||
|
|
#define USER_LOCK_IN_TEARDOWN (0x00000008) /* we're currently
|
||
|
|
* destroying this
|
||
|
|
* lock. */
|
||
|
|
#define USER_LOCK_QUEUED (0x00000010) /* lock is on the
|
||
|
|
* workqueue */
|
||
|
|
#define USER_LOCK_IN_CANCEL (0x00000020)
|
||
|
|
|
||
|
|
struct user_lock_res {
|
||
|
|
spinlock_t l_lock;
|
||
|
|
|
||
|
|
int l_flags;
|
||
|
|
|
||
|
|
#define USER_DLM_LOCK_ID_MAX_LEN 32
|
||
|
|
char l_name[USER_DLM_LOCK_ID_MAX_LEN];
|
||
|
|
int l_namelen;
|
||
|
|
int l_level;
|
||
|
|
unsigned int l_ro_holders;
|
||
|
|
unsigned int l_ex_holders;
|
||
|
|
struct dlm_lockstatus l_lksb;
|
||
|
|
|
||
|
|
int l_requested;
|
||
|
|
int l_blocking;
|
||
|
|
|
||
|
|
wait_queue_head_t l_event;
|
||
|
|
|
||
|
|
struct work_struct l_work;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct workqueue_struct *user_dlm_worker;
|
||
|
|
|
||
|
|
void user_dlm_lock_res_init(struct user_lock_res *lockres,
|
||
|
|
struct dentry *dentry);
|
||
|
|
int user_dlm_destroy_lock(struct user_lock_res *lockres);
|
||
|
|
int user_dlm_cluster_lock(struct user_lock_res *lockres,
|
||
|
|
int level,
|
||
|
|
int lkm_flags);
|
||
|
|
void user_dlm_cluster_unlock(struct user_lock_res *lockres,
|
||
|
|
int level);
|
||
|
|
void user_dlm_write_lvb(struct inode *inode,
|
||
|
|
const char *val,
|
||
|
|
unsigned int len);
|
||
|
|
void user_dlm_read_lvb(struct inode *inode,
|
||
|
|
char *val,
|
||
|
|
unsigned int len);
|
||
|
|
struct dlm_ctxt *user_dlm_register_context(struct qstr *name,
|
||
|
|
struct dlm_protocol_version *proto);
|
||
|
|
void user_dlm_unregister_context(struct dlm_ctxt *dlm);
|
||
|
|
|
||
|
|
struct dlmfs_inode_private {
|
||
|
|
struct dlm_ctxt *ip_dlm;
|
||
|
|
|
||
|
|
struct user_lock_res ip_lockres; /* unused for directories. */
|
||
|
|
struct inode *ip_parent;
|
||
|
|
|
||
|
|
struct inode ip_vfs_inode;
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline struct dlmfs_inode_private *
|
||
|
|
DLMFS_I(struct inode *inode)
|
||
|
|
{
|
||
|
|
return container_of(inode,
|
||
|
|
struct dlmfs_inode_private,
|
||
|
|
ip_vfs_inode);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct dlmfs_filp_private {
|
||
|
|
int fp_lock_level;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define DLMFS_MAGIC 0x76a9f425
|
||
|
|
|
||
|
|
#endif /* USERDLM_H */
|