fs/dlm/lock.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /******************************************************************************
   3 *******************************************************************************
   4 **
   5 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
   6 **
   7 **
   8 *******************************************************************************
   9 ******************************************************************************/
  10
  11 #ifndef __LOCK_DOT_H__
  12 #define __LOCK_DOT_H__
  13
  14 void dlm_dump_rsb(struct dlm_rsb *r);
  15 void dlm_dump_rsb_name(struct dlm_ls *ls, const char *name, int len);
  16 void dlm_print_lkb(struct dlm_lkb *lkb);
  17 void dlm_receive_message_saved(struct dlm_ls *ls, const struct dlm_message *ms,
  18                                uint32_t saved_seq);
  19 void dlm_receive_buffer(const union dlm_packet *p, int nodeid);
  20 int dlm_modes_compat(int mode1, int mode2);
  21 void free_inactive_rsb(struct dlm_rsb *r);
  22 void dlm_put_rsb(struct dlm_rsb *r);
  23 void dlm_hold_rsb(struct dlm_rsb *r);
  24 int dlm_put_lkb(struct dlm_lkb *lkb);
  25 int dlm_lock_recovery_try(struct dlm_ls *ls);
  26 void dlm_lock_recovery(struct dlm_ls *ls);
  27 void dlm_unlock_recovery(struct dlm_ls *ls);
  28 void dlm_rsb_scan(struct timer_list *timer);
  29 void resume_scan_timer(struct dlm_ls *ls);
  30
  31 int dlm_master_lookup(struct dlm_ls *ls, int from_nodeid, const char *name,
  32                       int len, unsigned int flags, int *r_nodeid, int *result);
  33
  34 int dlm_search_rsb_tree(struct rhashtable *rhash, const void *name, int len,
  35                         struct dlm_rsb **r_ret);
  36
  37 void dlm_recover_purge(struct dlm_ls *ls, const struct list_head *root_list);
  38 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
  39 void dlm_recover_grant(struct dlm_ls *ls);
  40 int dlm_recover_waiters_post(struct dlm_ls *ls);
  41 void dlm_recover_waiters_pre(struct dlm_ls *ls);
  42 int dlm_recover_master_copy(struct dlm_ls *ls, const struct dlm_rcom *rc,
  43                             __le32 *rl_remid, __le32 *rl_result);
  44 int dlm_recover_process_copy(struct dlm_ls *ls, const struct dlm_rcom *rc,
  45                              uint64_t seq);
  46
  47 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
  48         uint32_t flags, void *name, unsigned int namelen);
  49 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  50         int mode, uint32_t flags, uint32_t lkid, char *lvb_in);
  51 int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  52         int mode, uint32_t flags, void *name, unsigned int namelen,
  53         uint32_t *lkid);
  54 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  55         uint32_t flags, uint32_t lkid, char *lvb_in);
  56 int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
  57         uint32_t flags, uint32_t lkid);
  58 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
  59         int nodeid, int pid);
  60 int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
  61 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
  62 int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
  63                       int lkb_nodeid, unsigned int lkb_flags, int lkb_status);
  64 int dlm_debug_add_lkb_to_waiters(struct dlm_ls *ls, uint32_t lkb_id,
  65                                  int mstype, int to_nodeid);
  66
  67 static inline int is_master(struct dlm_rsb *r)
  68 {
  69         WARN_ON_ONCE(r->res_nodeid == -1);
  70
  71         return !r->res_nodeid;
  72 }
  73
  74 static inline void lock_rsb(struct dlm_rsb *r)
  75 {
  76         spin_lock_bh(&r->res_lock);
  77 }
  78
  79 static inline void unlock_rsb(struct dlm_rsb *r)
  80 {
  81         spin_unlock_bh(&r->res_lock);
  82 }
  83
  84 #endif
  85