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