acpi:PNP0700:
     €ЗМѓtµЖГЙ ¶    /* SPDX-License-Identifier: GPL-2.0-only */
/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
**
**
*******************************************************************************
******************************************************************************/
#ifndef __DLM_DOT_H__
#define __DLM_DOT_H__

#include <uapi/linux/dlm.h>


struct dlm_slot {
	int nodeid; /* 1 to MAX_INT */
	int slot;   /* 1 to MAX_INT */
};

/*
 * recover_prep: called before the dlm begins lock recovery.
 *   Notfies lockspace user that locks from failed members will be granted.
 * recover_slot: called after recover_prep and before recover_done.
 *   Identifies a failed lockspace member.
 * recover_done: called after the dlm completes lock recovery.
 *   Identifies lockspace members and lockspace generation number.
 */

struct dlm_lockspace_ops {
	void (*recover_prep) (void *ops_arg);
	void (*recover_slot) (void *ops_arg, struct dlm_slot *slot);
	void (*recover_done) (void *ops_arg, struct dlm_slot *slots,
			      int num_slots, int our_slot, uint32_t generation);
};

/*
 * dlm_new_lockspace
 *
 * Create/join a lockspace.
 *
 * name: lockspace name, null terminated, up to DLM_LOCKSPACE_LEN (not
 *   including terminating null).
 *
 * cluster: cluster name, null terminated, up to DLM_LOCKSPACE_LEN (not
 *   including terminating null).  Optional.  When cluster is null, it
 *   is not used.  When set, dlm_new_lockspace() returns -EBADR if cluster
 *   is not equal to the dlm cluster name.
 *
 * flags:
 * DLM_LSFL_NODIR
 *   The dlm should not use a resource directory, but statically assign
 *   resource mastery to nodes based on the name hash that is otherwise
 *   used to select the directory node.  Must be the same on all nodes.
 * DLM_LSFL_TIMEWARN
 *   The dlm should emit netlink messages if locks have been waiting
 *   for a configurable amount of time.  (Unused.)
 * DLM_LSFL_FS
 *   The lockspace user is in the kernel (i.e. filesystem).  Enables
 *   direct bast/cast callbacks.
 * DLM_LSFL_NEWEXCL
 *   dlm_new_lockspace() should return -EEXIST if the lockspace exists.
 *
 * lvblen: length of lvb in bytes.  Must be multiple of 8.
 *   dlm_new_lockspace() returns an error if this does not match
 *   what other nodes are using.
 *
 * ops: callbacks that indicate lockspace recovery points so the
 *   caller can coordinate its recovery and know lockspace members.
 *   This is only used by the initial dlm_new_lockspace() call.
 *   Optional.
 *
 * ops_arg: arg for ops callbacks.
 *
 * ops_result: tells caller if the ops callbacks (if provided) will
 *   be used or not.  0: will be used, -EXXX will not be used.
 *   -EOPNOTSUPP: the dlm does not have recovery_callbacks enabled.
 *
 * lockspace: handle for dlm functions
 */

int dlm_new_lockspace(const char *name, const char *cluster,
		      uint32_t flags, int lvblen,
		      const struct dlm_lockspace_ops *ops, void *ops_arg,
		      int *ops_result, dlm_lockspace_t **lockspace);

/*
 * dlm_release_lockspace() release_option values:
 *
 * DLM_RELEASE_NO_LOCKS returns -EBUSY if any locks (lkb's)
 *   exist in the local lockspace.
 *
 * DLM_RELEASE_UNUSED previous value that is no longer used.
 *
 * DLM_RELEASE_NORMAL releases the lockspace regardless of any
 *   locks managed in the local lockspace.
 *
 * DLM_RELEASE_NO_EVENT release the lockspace regardless of any
 *   locks managed in the local lockspace, and does not submit
 *   a leave event to the cluster manager, so other nodes will
 *   not be notified that the node should be removed from the
 *   list of lockspace members.
 *
 * DLM_RELEASE_RECOVER like DLM_RELEASE_NORMAL, but the remaining
 *   nodes will handle the removal of the node as if the node
 *   had failed, e.g. the recover_slot() callback would be used.
 */
#define DLM_RELEASE_NO_LOCKS