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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/fs/dlm/lock.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/******************************************************************************

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*******************************************************************************

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**

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**  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.

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**

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**

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*******************************************************************************

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******************************************************************************/

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#ifndef __LOCK_DOT_H__

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#define __LOCK_DOT_H__

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void dlm_dump_rsb(struct dlm_rsb *r);

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void dlm_dump_rsb_name(struct dlm_ls *ls, const char *name, int len);

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void dlm_print_lkb(struct dlm_lkb *lkb);

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void dlm_receive_message_saved(struct dlm_ls *ls, const struct dlm_message *ms,

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			       uint32_t saved_seq);

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void dlm_receive_buffer(const union dlm_packet *p, int nodeid);

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int dlm_modes_compat(int mode1, int mode2);

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void free_inactive_rsb(struct dlm_rsb *r);

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void dlm_put_rsb(struct dlm_rsb *r);

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void dlm_hold_rsb(struct dlm_rsb *r);

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int dlm_put_lkb(struct dlm_lkb *lkb);

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int dlm_lock_recovery_try(struct dlm_ls *ls);

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void dlm_lock_recovery(struct dlm_ls *ls);

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void dlm_unlock_recovery(struct dlm_ls *ls);

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void dlm_rsb_scan(struct timer_list *timer);

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void resume_scan_timer(struct dlm_ls *ls);

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int dlm_master_lookup(struct dlm_ls *ls, int from_nodeid, const char *name,

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		      int len, unsigned int flags, int *r_nodeid, int *result);

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int dlm_search_rsb_tree(struct rhashtable *rhash, const void *name, int len,

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			struct dlm_rsb **r_ret);

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void dlm_recover_purge(struct dlm_ls *ls, const struct list_head *root_list);

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void dlm_purge_mstcpy_locks(struct dlm_rsb *r);

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void dlm_recover_grant(struct dlm_ls *ls);

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int dlm_recover_waiters_post(struct dlm_ls *ls);

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void dlm_recover_waiters_pre(struct dlm_ls *ls);

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int dlm_recover_master_copy(struct dlm_ls *ls, const struct dlm_rcom *rc,

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			    __le32 *rl_remid, __le32 *rl_result);

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int dlm_recover_process_copy(struct dlm_ls *ls, const struct dlm_rcom *rc,

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			     uint64_t seq);

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int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,

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	uint32_t flags, void *name, unsigned int namelen);

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int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,

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	int mode, uint32_t flags, uint32_t lkid, char *lvb_in);

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int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,

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	int mode, uint32_t flags, void *name, unsigned int namelen,

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	uint32_t *lkid);

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int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,

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	uint32_t flags, uint32_t lkid, char *lvb_in);

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int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,

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	uint32_t flags, uint32_t lkid);

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int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,

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	int nodeid, int pid);

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int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);

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void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);

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int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,

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		      int lkb_nodeid, unsigned int lkb_flags, int lkb_status);

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int dlm_debug_add_lkb_to_waiters(struct dlm_ls *ls, uint32_t lkb_id,

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				 int mstype, int to_nodeid);

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static inline int is_master(struct dlm_rsb *r)

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{

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	WARN_ON_ONCE(r->res_nodeid == -1);

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	return !r->res_nodeid;

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}

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static inline void lock_rsb(struct dlm_rsb *r)

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{

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	spin_lock_bh(&r->res_lock);

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}

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static inline void unlock_rsb(struct dlm_rsb *r)

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{

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	spin_unlock_bh(&r->res_lock);

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}

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#endif

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