LXR linux/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
  16void dlm_dump_rsb(struct dlm_rsb *r);
  17void dlm_dump_rsb_name(struct dlm_ls *ls, char *name, int len);
  18void dlm_print_lkb(struct dlm_lkb *lkb);
  19void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms,
  20                               uint32_t saved_seq);
  21void dlm_receive_buffer(union dlm_packet *p, int nodeid);
  22int dlm_modes_compat(int mode1, int mode2);
  23void dlm_put_rsb(struct dlm_rsb *r);
  24void dlm_hold_rsb(struct dlm_rsb *r);
  25int dlm_put_lkb(struct dlm_lkb *lkb);
  26void dlm_scan_rsbs(struct dlm_ls *ls);
  27int dlm_lock_recovery_try(struct dlm_ls *ls);
  28void dlm_unlock_recovery(struct dlm_ls *ls);
  29void dlm_scan_waiters(struct dlm_ls *ls);
  30void dlm_scan_timeout(struct dlm_ls *ls);
  31void dlm_adjust_timeouts(struct dlm_ls *ls);
  32int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
  33                      unsigned int flags, int *r_nodeid, int *result);
  34
  35int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
  36                        struct dlm_rsb **r_ret);
  37
  38void dlm_recover_purge(struct dlm_ls *ls);
  39void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
  40void dlm_recover_grant(struct dlm_ls *ls);
  41int dlm_recover_waiters_post(struct dlm_ls *ls);
  42void dlm_recover_waiters_pre(struct dlm_ls *ls);
  43int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  44int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
  45
  46int 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);
  49int 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);
  52int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  53        int mode, uint32_t flags, void *name, unsigned int namelen,
  54        unsigned long timeout_cs, uint32_t *lkid);
  55int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  56        uint32_t flags, uint32_t lkid, char *lvb_in);
  57int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
  58        uint32_t flags, uint32_t lkid);
  59int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
  60        int nodeid, int pid);
  61int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
  62void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
  63
  64static inline int is_master(struct dlm_rsb *r)
  65{
  66        return !r->res_nodeid;
  67}
  68
  69static inline void lock_rsb(struct dlm_rsb *r)
  70{
  71        mutex_lock(&r->res_mutex);
  72}
  73
  74static inline void unlock_rsb(struct dlm_rsb *r)
  75{
  76        mutex_unlock(&r->res_mutex);
  77}
  78
  79#endif
  80
  81