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, char *name, int len);
  16 void dlm_print_lkb(struct dlm_lkb *lkb);
  17 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms,
  18                                uint32_t saved_seq);
  19 void dlm_receive_buffer(union dlm_packet *p, int nodeid);
  20 int dlm_modes_compat(int mode1, int mode2);
  21 void dlm_put_rsb(struct dlm_rsb *r);
  22 void dlm_hold_rsb(struct dlm_rsb *r);
  23 int dlm_put_lkb(struct dlm_lkb *lkb);
  24 void dlm_scan_rsbs(struct dlm_ls *ls);
  25 int dlm_lock_recovery_try(struct dlm_ls *ls);
  26 void dlm_unlock_recovery(struct dlm_ls *ls);
  27 void dlm_scan_waiters(struct dlm_ls *ls);
  28 void dlm_scan_timeout(struct dlm_ls *ls);
  29 void dlm_adjust_timeouts(struct dlm_ls *ls);
  30 int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
  31                       unsigned int flags, int *r_nodeid, int *result);
  32
  33 int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
  34                         struct dlm_rsb **r_ret);
  35
  36 void dlm_recover_purge(struct dlm_ls *ls);
  37 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
  38 void dlm_recover_grant(struct dlm_ls *ls);
  39 int dlm_recover_waiters_post(struct dlm_ls *ls);
  40 void dlm_recover_waiters_pre(struct dlm_ls *ls);
  41 int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  42 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  43
  44 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
  45         uint32_t flags, void *name, unsigned int namelen,
  46         unsigned long timeout_cs);
  47 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  48         int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
  49         unsigned long timeout_cs);
  50 int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  51         int mode, uint32_t flags, void *name, unsigned int namelen,
  52         unsigned long timeout_cs, uint32_t *lkid);
  53 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  54         uint32_t flags, uint32_t lkid, char *lvb_in);
  55 int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
  56         uint32_t flags, uint32_t lkid);
  57 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
  58         int nodeid, int pid);
  59 int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
  60 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
  61
  62 static inline int is_master(struct dlm_rsb *r)
  63 {
  64         return !r->res_nodeid;
  65 }
  66
  67 static inline void lock_rsb(struct dlm_rsb *r)
  68 {
  69         mutex_lock(&r->res_mutex);
  70 }
  71
  72 static inline void unlock_rsb(struct dlm_rsb *r)
  73 {
  74         mutex_unlock(&r->res_mutex);
  75 }
  76
  77 #endif
  78