fs/dlm/lock.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /******************************************************************************
0003 *******************************************************************************
0004 **
0005 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
0006 **
0007 **
0008 *******************************************************************************
0009 ******************************************************************************/
0010
0011 #ifndef __LOCK_DOT_H__
0012 #define __LOCK_DOT_H__
0013
0014 void dlm_dump_rsb(struct dlm_rsb *r);
0015 void dlm_dump_rsb_name(struct dlm_ls *ls, char *name, int len);
0016 void dlm_print_lkb(struct dlm_lkb *lkb);
0017 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms,
0018                    uint32_t saved_seq);
0019 void dlm_receive_buffer(union dlm_packet *p, int nodeid);
0020 int dlm_modes_compat(int mode1, int mode2);
0021 void dlm_put_rsb(struct dlm_rsb *r);
0022 void dlm_hold_rsb(struct dlm_rsb *r);
0023 int dlm_put_lkb(struct dlm_lkb *lkb);
0024 void dlm_scan_rsbs(struct dlm_ls *ls);
0025 int dlm_lock_recovery_try(struct dlm_ls *ls);
0026 void dlm_unlock_recovery(struct dlm_ls *ls);
0027
0028 #ifdef CONFIG_DLM_DEPRECATED_API
0029 void dlm_scan_timeout(struct dlm_ls *ls);
0030 void dlm_adjust_timeouts(struct dlm_ls *ls);
0031 #else
0032 static inline void dlm_scan_timeout(struct dlm_ls *ls) { }
0033 static inline void dlm_adjust_timeouts(struct dlm_ls *ls) { }
0034 #endif
0035
0036 int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
0037               unsigned int flags, int *r_nodeid, int *result);
0038
0039 int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
0040             struct dlm_rsb **r_ret);
0041
0042 void dlm_recover_purge(struct dlm_ls *ls);
0043 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
0044 void dlm_recover_grant(struct dlm_ls *ls);
0045 int dlm_recover_waiters_post(struct dlm_ls *ls);
0046 void dlm_recover_waiters_pre(struct dlm_ls *ls);
0047 int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
0048 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
0049
0050 #ifdef CONFIG_DLM_DEPRECATED_API
0051 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
0052     uint32_t flags, void *name, unsigned int namelen,
0053     unsigned long timeout_cs);
0054 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
0055     int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
0056     unsigned long timeout_cs);
0057 #else
0058 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
0059     uint32_t flags, void *name, unsigned int namelen);
0060 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
0061     int mode, uint32_t flags, uint32_t lkid, char *lvb_in);
0062 #endif
0063 int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
0064     int mode, uint32_t flags, void *name, unsigned int namelen,
0065     uint32_t *lkid);
0066 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
0067     uint32_t flags, uint32_t lkid, char *lvb_in);
0068 int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
0069     uint32_t flags, uint32_t lkid);
0070 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
0071     int nodeid, int pid);
0072 int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
0073 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
0074 int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
0075               int lkb_nodeid, unsigned int lkb_flags, int lkb_status);
0076 int dlm_debug_add_lkb_to_waiters(struct dlm_ls *ls, uint32_t lkb_id,
0077                  int mstype, int to_nodeid);
0078
0079 static inline int is_master(struct dlm_rsb *r)
0080 {
0081     return !r->res_nodeid;
0082 }
0083
0084 static inline void lock_rsb(struct dlm_rsb *r)
0085 {
0086     mutex_lock(&r->res_mutex);
0087 }
0088
0089 static inline void unlock_rsb(struct dlm_rsb *r)
0090 {
0091     mutex_unlock(&r->res_mutex);
0092 }
0093
0094 #endif
0095