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dlm_device.h
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/****************************************************************************** ******************************************************************************* ** ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. ** Copyright (C) 2004-2007 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. ** ******************************************************************************* ******************************************************************************/ #ifndef _LINUX_DLM_DEVICE_H #define _LINUX_DLM_DEVICE_H /* This is the device interface for dlm, most users will use a library * interface. */ #include <linux/dlm.h> #include <linux/types.h> #define DLM_USER_LVB_LEN 32 /* Version of the device interface */ #define DLM_DEVICE_VERSION_MAJOR 6 #define DLM_DEVICE_VERSION_MINOR 0 #define DLM_DEVICE_VERSION_PATCH 2 /* struct passed to the lock write */ struct dlm_lock_params { __u8 mode; __u8 namelen; __u16 unused; __u32 flags; __u32 lkid; __u32 parent; __u64 xid; __u64 timeout; void *castparam; void *castaddr; void *bastparam; void *bastaddr; struct dlm_lksb *lksb; char lvb[DLM_USER_LVB_LEN]; char name[0]; }; struct dlm_lspace_params { __u32 flags; __u32 minor; char name[0]; }; struct dlm_purge_params { __u32 nodeid; __u32 pid; }; 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; struct dlm_purge_params purge; } i; }; struct dlm_device_version { __u32 version[3]; }; /* struct read from the "device" fd, consists mainly of userspace pointers for the library to use */ struct dlm_lock_result { __u32 version[3]; __u32 length; void * user_astaddr; void * user_astparam; struct dlm_lksb * 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 #define DLM_USER_PURGE 6 #define DLM_USER_DEADLOCK 7 /* Lockspace flags */ #define DLM_USER_LSFLG_AUTOFREE 1 #define DLM_USER_LSFLG_FORCEFREE 2 #endif