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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/ocfs2/dlmfs/userdlm.h
Initial import
Diffstat (limited to 'fs/ocfs2/dlmfs/userdlm.h')
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diff --git a/fs/ocfs2/dlmfs/userdlm.h b/fs/ocfs2/dlmfs/userdlm.h
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+++ b/fs/ocfs2/dlmfs/userdlm.h
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+/* -*- 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 ocfs2_dlm_lksb 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);
+ssize_t user_dlm_read_lvb(struct inode *inode,
+ char *val,
+ unsigned int len);
+struct ocfs2_cluster_connection *user_dlm_register(struct qstr *name);
+void user_dlm_unregister(struct ocfs2_cluster_connection *conn);
+void user_dlm_set_locking_protocol(void);
+
+struct dlmfs_inode_private {
+ struct ocfs2_cluster_connection *ip_conn;
+
+ 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 */