fs/dlm/lock.h

   1 /******************************************************************************
   2 *******************************************************************************
   3 **
   4 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
   5 **
   6 **  This copyrighted material is made available to anyone wishing to use,
   7 **  modify, copy, or redistribute it subject to the terms and conditions
   8 **  of the GNU General Public License v.2.
   9 **
  10 *******************************************************************************
  11 ******************************************************************************/
  12
  13 #ifndef __LOCK_DOT_H__
  14 #define __LOCK_DOT_H__
  15
  16 void dlm_dump_rsb(struct dlm_rsb *r);
  17 void dlm_print_lkb(struct dlm_lkb *lkb);
  18 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms);
  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
  31 int dlm_purge_locks(struct dlm_ls *ls);
  32 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
  33 void dlm_grant_after_purge(struct dlm_ls *ls);
  34 int dlm_recover_waiters_post(struct dlm_ls *ls);
  35 void dlm_recover_waiters_pre(struct dlm_ls *ls);
  36 int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  37 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  38
  39 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
  40         uint32_t flags, void *name, unsigned int namelen,
  41         unsigned long timeout_cs);
  42 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  43         int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
  44         unsigned long timeout_cs);
  45 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  46         uint32_t flags, uint32_t lkid, char *lvb_in);
  47 int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
  48         uint32_t flags, uint32_t lkid);
  49 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
  50         int nodeid, int pid);
  51 int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
  52 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
  53
  54 static inline int is_master(struct dlm_rsb *r)
  55 {
  56         return !r->res_nodeid;
  57 }
  58
  59 static inline void lock_rsb(struct dlm_rsb *r)
  60 {
  61         mutex_lock(&r->res_mutex);
  62 }
  63
  64 static inline void unlock_rsb(struct dlm_rsb *r)
  65 {
  66         mutex_unlock(&r->res_mutex);
  67 }
  68
  69 #endif
  70