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-rw-r--r--include/linux/dlm_device.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/include/linux/dlm_device.h b/include/linux/dlm_device.h
new file mode 100644
index 000000000000..2a2dd189b9fd
--- /dev/null
+++ b/include/linux/dlm_device.h
@@ -0,0 +1,86 @@
+/******************************************************************************
+*******************************************************************************
+**
+** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+**
+** This copyrighted material is made available to anyone wishing to use,
+** modify, copy, or redistribute it subject to the terms and conditions
+** of the GNU General Public License v.2.
+**
+*******************************************************************************
+******************************************************************************/
+
+/* This is the device interface for dlm, most users will use a library
+ * interface.
+ */
+
+#define DLM_USER_LVB_LEN 32
+
+/* Version of the device interface */
+#define DLM_DEVICE_VERSION_MAJOR 5
+#define DLM_DEVICE_VERSION_MINOR 0
+#define DLM_DEVICE_VERSION_PATCH 0
+
+/* struct passed to the lock write */
+struct dlm_lock_params {
+ __u8 mode;
+ __u8 namelen;
+ __u16 flags;
+ __u32 lkid;
+ __u32 parent;
+ void __user *castparam;
+ void __user *castaddr;
+ void __user *bastparam;
+ void __user *bastaddr;
+ struct dlm_lksb __user *lksb;
+ char lvb[DLM_USER_LVB_LEN];
+ char name[0];
+};
+
+struct dlm_lspace_params {
+ __u32 flags;
+ __u32 minor;
+ char name[0];
+};
+
+struct dlm_write_request {
+ __u32 version[3];
+ __u8 cmd;
+ __u8 is64bit;
+ __u8 unused[2];
+
+ union {
+ struct dlm_lock_params lock;
+ struct dlm_lspace_params lspace;
+ } i;
+};
+
+/* struct read from the "device" fd,
+ consists mainly of userspace pointers for the library to use */
+struct dlm_lock_result {
+ __u32 length;
+ void __user * user_astaddr;
+ void __user * user_astparam;
+ struct dlm_lksb __user * user_lksb;
+ struct dlm_lksb lksb;
+ __u8 bast_mode;
+ __u8 unused[3];
+ /* Offsets may be zero if no data is present */
+ __u32 lvb_offset;
+};
+
+/* Commands passed to the device */
+#define DLM_USER_LOCK 1
+#define DLM_USER_UNLOCK 2
+#define DLM_USER_QUERY 3
+#define DLM_USER_CREATE_LOCKSPACE 4
+#define DLM_USER_REMOVE_LOCKSPACE 5
+
+/* Arbitrary length restriction */
+#define MAX_LS_NAME_LEN 64
+
+/* Lockspace flags */
+#define DLM_USER_LSFLG_AUTOFREE 1
+#define DLM_USER_LSFLG_FORCEFREE 2
+