mirror of
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Import fs/dlm/* from linux-3.10.0-327.36.1.el7
Also wire it into the build system. We have to figure out how to get scoutfs pulling in the right headers but that can wait until we have something more usable. Signed-off-by: Mark Fasheh <mfasheh@versity.com>
This commit is contained in:
Mark Fasheh
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/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#ifndef _UAPI__DLM_DOT_H__
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#define _UAPI__DLM_DOT_H__
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/*
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* Interface to Distributed Lock Manager (DLM)
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* routines and structures to use DLM lockspaces
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*/
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/* Lock levels and flags are here */
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#include <linux/dlmconstants.h>
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#include <linux/types.h>
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typedef void dlm_lockspace_t;
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/*
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* Lock status block
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*
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* Use this structure to specify the contents of the lock value block. For a
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* conversion request, this structure is used to specify the lock ID of the
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* lock. DLM writes the status of the lock request and the lock ID assigned
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* to the request in the lock status block.
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*
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* sb_lkid: the returned lock ID. It is set on new (non-conversion) requests.
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* It is available when dlm_lock returns.
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*
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* sb_lvbptr: saves or returns the contents of the lock's LVB according to rules
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* shown for the DLM_LKF_VALBLK flag.
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*
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* sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock,
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* it was first demoted to NL to avoid conversion deadlock.
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* DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid.
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*
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* sb_status: the returned status of the lock request set prior to AST
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* execution. Possible return values:
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*
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* 0 if lock request was successful
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* -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE
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* -DLM_EUNLOCK if unlock request was successful
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* -DLM_ECANCEL if a cancel completed successfully
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* -EDEADLK if a deadlock was detected
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* -ETIMEDOUT if the lock request was canceled due to a timeout
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*/
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#define DLM_SBF_DEMOTED 0x01
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#define DLM_SBF_VALNOTVALID 0x02
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#define DLM_SBF_ALTMODE 0x04
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struct dlm_lksb {
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int sb_status;
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__u32 sb_lkid;
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char sb_flags;
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char * sb_lvbptr;
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};
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/* dlm_new_lockspace() flags */
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#define DLM_LSFL_TIMEWARN 0x00000002
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#define DLM_LSFL_FS 0x00000004
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#define DLM_LSFL_NEWEXCL 0x00000008
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#endif /* _UAPI__DLM_DOT_H__ */
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@@ -0,0 +1,108 @@
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/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#ifndef _LINUX_DLM_DEVICE_H
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#define _LINUX_DLM_DEVICE_H
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/* This is the device interface for dlm, most users will use a library
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* interface.
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*/
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#include <linux/dlm.h>
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#include <linux/types.h>
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#define DLM_USER_LVB_LEN 32
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/* Version of the device interface */
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#define DLM_DEVICE_VERSION_MAJOR 6
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#define DLM_DEVICE_VERSION_MINOR 0
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#define DLM_DEVICE_VERSION_PATCH 1
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/* struct passed to the lock write */
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struct dlm_lock_params {
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__u8 mode;
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__u8 namelen;
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__u16 unused;
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__u32 flags;
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__u32 lkid;
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__u32 parent;
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__u64 xid;
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__u64 timeout;
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void __user *castparam;
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void __user *castaddr;
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void __user *bastparam;
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void __user *bastaddr;
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struct dlm_lksb __user *lksb;
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char lvb[DLM_USER_LVB_LEN];
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char name[0];
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};
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struct dlm_lspace_params {
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__u32 flags;
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__u32 minor;
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char name[0];
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};
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struct dlm_purge_params {
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__u32 nodeid;
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__u32 pid;
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};
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struct dlm_write_request {
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__u32 version[3];
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__u8 cmd;
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__u8 is64bit;
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__u8 unused[2];
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union {
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struct dlm_lock_params lock;
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struct dlm_lspace_params lspace;
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struct dlm_purge_params purge;
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} i;
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};
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struct dlm_device_version {
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__u32 version[3];
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};
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/* struct read from the "device" fd,
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consists mainly of userspace pointers for the library to use */
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struct dlm_lock_result {
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__u32 version[3];
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__u32 length;
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void __user * user_astaddr;
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void __user * user_astparam;
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struct dlm_lksb __user * user_lksb;
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struct dlm_lksb lksb;
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__u8 bast_mode;
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__u8 unused[3];
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/* Offsets may be zero if no data is present */
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__u32 lvb_offset;
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};
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/* Commands passed to the device */
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#define DLM_USER_LOCK 1
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#define DLM_USER_UNLOCK 2
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#define DLM_USER_QUERY 3
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#define DLM_USER_CREATE_LOCKSPACE 4
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#define DLM_USER_REMOVE_LOCKSPACE 5
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#define DLM_USER_PURGE 6
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#define DLM_USER_DEADLOCK 7
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/* Lockspace flags */
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#define DLM_USER_LSFLG_AUTOFREE 1
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#define DLM_USER_LSFLG_FORCEFREE 2
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#endif
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@@ -0,0 +1,58 @@
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/*
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* Copyright (C) 2007 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#ifndef _DLM_NETLINK_H
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#define _DLM_NETLINK_H
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#include <linux/types.h>
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enum {
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DLM_STATUS_WAITING = 1,
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DLM_STATUS_GRANTED = 2,
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DLM_STATUS_CONVERT = 3,
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};
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#define DLM_LOCK_DATA_VERSION 1
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struct dlm_lock_data {
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__u16 version;
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__u32 lockspace_id;
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int nodeid;
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int ownpid;
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__u32 id;
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__u32 remid;
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__u64 xid;
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__s8 status;
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__s8 grmode;
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__s8 rqmode;
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unsigned long timestamp;
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int resource_namelen;
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char resource_name[DLM_RESNAME_MAXLEN];
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};
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enum {
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DLM_CMD_UNSPEC = 0,
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DLM_CMD_HELLO, /* user->kernel */
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DLM_CMD_TIMEOUT, /* kernel->user */
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__DLM_CMD_MAX,
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};
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#define DLM_CMD_MAX (__DLM_CMD_MAX - 1)
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enum {
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DLM_TYPE_UNSPEC = 0,
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DLM_TYPE_LOCK,
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__DLM_TYPE_MAX,
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};
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#define DLM_TYPE_MAX (__DLM_TYPE_MAX - 1)
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#define DLM_GENL_VERSION 0x1
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#define DLM_GENL_NAME "DLM"
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#endif /* _DLM_NETLINK_H */
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@@ -0,0 +1,45 @@
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/*
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* Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#ifndef _UAPI__DLM_PLOCK_DOT_H__
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#define _UAPI__DLM_PLOCK_DOT_H__
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#include <linux/types.h>
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#define DLM_PLOCK_MISC_NAME "dlm_plock"
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#define DLM_PLOCK_VERSION_MAJOR 1
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#define DLM_PLOCK_VERSION_MINOR 2
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#define DLM_PLOCK_VERSION_PATCH 0
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enum {
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DLM_PLOCK_OP_LOCK = 1,
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DLM_PLOCK_OP_UNLOCK,
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DLM_PLOCK_OP_GET,
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};
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#define DLM_PLOCK_FL_CLOSE 1
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struct dlm_plock_info {
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__u32 version[3];
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__u8 optype;
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__u8 ex;
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__u8 wait;
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__u8 flags;
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__u32 pid;
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__s32 nodeid;
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__s32 rv;
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__u32 fsid;
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__u64 number;
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__u64 start;
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__u64 end;
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__u64 owner;
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};
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#endif /* _UAPI__DLM_PLOCK_DOT_H__ */
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@@ -0,0 +1,163 @@
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/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#ifndef __DLMCONSTANTS_DOT_H__
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#define __DLMCONSTANTS_DOT_H__
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/*
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* Constants used by DLM interface.
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*/
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#define DLM_LOCKSPACE_LEN 64
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#define DLM_RESNAME_MAXLEN 64
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/*
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* Lock Modes
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*/
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#define DLM_LOCK_IV (-1) /* invalid */
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#define DLM_LOCK_NL 0 /* null */
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#define DLM_LOCK_CR 1 /* concurrent read */
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#define DLM_LOCK_CW 2 /* concurrent write */
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#define DLM_LOCK_PR 3 /* protected read */
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#define DLM_LOCK_PW 4 /* protected write */
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#define DLM_LOCK_EX 5 /* exclusive */
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/*
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* Flags to dlm_lock
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*
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* DLM_LKF_NOQUEUE
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*
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* Do not queue the lock request on the wait queue if it cannot be granted
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* immediately. If the lock cannot be granted because of this flag, DLM will
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* either return -EAGAIN from the dlm_lock call or will return 0 from
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* dlm_lock and -EAGAIN in the lock status block when the AST is executed.
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*
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* DLM_LKF_CANCEL
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*
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* Used to cancel a pending lock request or conversion. A converting lock is
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* returned to its previously granted mode.
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*
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* DLM_LKF_CONVERT
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*
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* Indicates a lock conversion request. For conversions the name and namelen
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* are ignored and the lock ID in the LKSB is used to identify the lock.
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*
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* DLM_LKF_VALBLK
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*
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* Requests DLM to return the current contents of the lock value block in the
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* lock status block. When this flag is set in a lock conversion from PW or EX
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* modes, DLM assigns the value specified in the lock status block to the lock
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* value block of the lock resource. The LVB is a DLM_LVB_LEN size array
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* containing application-specific information.
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*
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* DLM_LKF_QUECVT
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*
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* Force a conversion request to be queued, even if it is compatible with
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* the granted modes of other locks on the same resource.
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*
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* DLM_LKF_IVVALBLK
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*
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* Invalidate the lock value block.
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*
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* DLM_LKF_CONVDEADLK
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*
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* Allows the dlm to resolve conversion deadlocks internally by demoting the
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* granted mode of a converting lock to NL. The DLM_SBF_DEMOTED flag is
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* returned for a conversion that's been effected by this.
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*
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* DLM_LKF_PERSISTENT
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*
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* Only relevant to locks originating in userspace. A persistent lock will not
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* be removed if the process holding the lock exits.
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*
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* DLM_LKF_NODLCKWT
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*
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* Do not cancel the lock if it gets into conversion deadlock.
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* Exclude this lock from being monitored due to DLM_LSFL_TIMEWARN.
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*
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* DLM_LKF_NODLCKBLK
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*
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* net yet implemented
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*
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* DLM_LKF_EXPEDITE
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*
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* Used only with new requests for NL mode locks. Tells the lock manager
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* to grant the lock, ignoring other locks in convert and wait queues.
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*
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* DLM_LKF_NOQUEUEBAST
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*
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* Send blocking AST's before returning -EAGAIN to the caller. It is only
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* used along with the NOQUEUE flag. Blocking AST's are not sent for failed
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* NOQUEUE requests otherwise.
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*
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* DLM_LKF_HEADQUE
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*
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* Add a lock to the head of the convert or wait queue rather than the tail.
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*
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* DLM_LKF_NOORDER
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*
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* Disregard the standard grant order rules and grant a lock as soon as it
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* is compatible with other granted locks.
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*
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* DLM_LKF_ORPHAN
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*
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* Acquire an orphan lock.
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*
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* DLM_LKF_ALTPR
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*
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* If the requested mode cannot be granted immediately, try to grant the lock
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* in PR mode instead. If this alternate mode is granted instead of the
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* requested mode, DLM_SBF_ALTMODE is returned in the lksb.
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*
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* DLM_LKF_ALTCW
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*
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* The same as ALTPR, but the alternate mode is CW.
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*
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* DLM_LKF_FORCEUNLOCK
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*
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* Unlock the lock even if it is converting or waiting or has sublocks.
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* Only really for use by the userland device.c code.
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*
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*/
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#define DLM_LKF_NOQUEUE 0x00000001
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#define DLM_LKF_CANCEL 0x00000002
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#define DLM_LKF_CONVERT 0x00000004
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#define DLM_LKF_VALBLK 0x00000008
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#define DLM_LKF_QUECVT 0x00000010
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#define DLM_LKF_IVVALBLK 0x00000020
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#define DLM_LKF_CONVDEADLK 0x00000040
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#define DLM_LKF_PERSISTENT 0x00000080
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#define DLM_LKF_NODLCKWT 0x00000100
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#define DLM_LKF_NODLCKBLK 0x00000200
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#define DLM_LKF_EXPEDITE 0x00000400
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#define DLM_LKF_NOQUEUEBAST 0x00000800
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#define DLM_LKF_HEADQUE 0x00001000
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#define DLM_LKF_NOORDER 0x00002000
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#define DLM_LKF_ORPHAN 0x00004000
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#define DLM_LKF_ALTPR 0x00008000
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#define DLM_LKF_ALTCW 0x00010000
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#define DLM_LKF_FORCEUNLOCK 0x00020000
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#define DLM_LKF_TIMEOUT 0x00040000
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/*
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* Some return codes that are not in errno.h
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*/
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#define DLM_ECANCEL 0x10001
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#define DLM_EUNLOCK 0x10002
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#endif /* __DLMCONSTANTS_DOT_H__ */
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