[ceph.git] / ceph / src / mds / Locker.h

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
// vim: ts=8 sw=2 smarttab
/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software 
 * Foundation.  See file COPYING.
 * 
 */

#ifndef CEPH_MDS_LOCKER_H
#define CEPH_MDS_LOCKER_H

#include "include/types.h"

#include "messages/MClientCaps.h"
#include "messages/MClientCapRelease.h"
#include "messages/MClientLease.h"
#include "messages/MLock.h"

#include "CInode.h"
#include "SimpleLock.h"
#include "MDSContext.h"
#include "Mutation.h"
#include "messages/MClientReply.h"

struct SnapRealm;

class MDSRank;
class Session;
class CDentry;
class Capability;
class SimpleLock;
class ScatterLock;
class LocalLockC;

class Locker {
public:
  Locker(MDSRank *m, MDCache *c);

  SimpleLock *get_lock(int lock_type, const MDSCacheObjectInfo &info);
  
  void dispatch(const cref_t<Message> &m);
  void handle_lock(const cref_t<MLock> &m);

  void tick();

  void nudge_log(SimpleLock *lock);

  bool acquire_locks(MDRequestRef& mdr,
		     MutationImpl::LockOpVec& lov,
		     CInode *auth_pin_freeze=NULL,
		     bool auth_pin_nonblocking=false);

  bool try_rdlock_snap_layout(CInode *in, MDRequestRef& mdr,
			      int n=0, bool want_layout=false);

  void notify_freeze_waiter(MDSCacheObject *o);
  void cancel_locking(MutationImpl *mut, std::set<CInode*> *pneed_issue);
  void drop_locks(MutationImpl *mut, std::set<CInode*> *pneed_issue=0);
  void set_xlocks_done(MutationImpl *mut, bool skip_dentry=false);
  void drop_non_rdlocks(MutationImpl *mut, std::set<CInode*> *pneed_issue=0);
  void drop_rdlocks_for_early_reply(MutationImpl *mut);
  void drop_locks_for_fragment_unfreeze(MutationImpl *mut);

  int get_cap_bit_for_lock_cache(int op);
  void create_lock_cache(MDRequestRef& mdr, CInode *diri, file_layout_t *dir_layout=nullptr);
  bool find_and_attach_lock_cache(MDRequestRef& mdr, CInode *diri);
  void invalidate_lock_caches(CDir *dir);
  void invalidate_lock_caches(SimpleLock *lock);
  void invalidate_lock_cache(MDLockCache *lock_cache);
  void eval_lock_caches(Capability *cap);
  void put_lock_cache(MDLockCache* lock_cache);

  void eval_gather(SimpleLock *lock, bool first=false, bool *need_issue=0, MDSContext::vec *pfinishers=0);
  void eval(SimpleLock *lock, bool *need_issue);
  void eval_any(SimpleLock *lock, bool *need_issue, MDSContext::vec *pfinishers=0, bool first=false) {
    if (!lock->is_stable())
      eval_gather(lock, first, need_issue, pfinishers);
    else if (lock->get_parent()->is_auth())
      eval(lock, need_issue);
  }

  void eval_scatter_gathers(CInode *in);

  void eval_cap_gather(CInode *in, std::set<CInode*> *issue_set=0);

  bool eval(CInode *in, int mask, bool caps_imported=false);
  void try_eval(MDSCacheObject *p, int mask);
  void try_eval(SimpleLock *lock, bool *pneed_issue);

  bool _rdlock_kick(SimpleLock *lock, bool as_anon);
  bool rdlock_try(SimpleLock *lock, client_t client);
  bool rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon=false);
  void rdlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);
  bool rdlock_try_set(MutationImpl::LockOpVec& lov, MDRequestRef& mdr);
  bool rdlock_try_set(MutationImpl::LockOpVec& lov, MutationRef& mut);

  void wrlock_force(SimpleLock *lock, MutationRef& mut);
  bool wrlock_try(SimpleLock *lock, const MutationRef& mut, client_t client=-1);
  bool wrlock_start(const MutationImpl::LockOp &op, MDRequestRef& mut);
  void wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);

  void remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut);
  void remote_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);

  bool xlock_start(SimpleLock *lock, MDRequestRef& mut);
  void _finish_xlock(SimpleLock *lock, client_t xlocker, bool *pneed_issue);
  void xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);

  void xlock_export(const MutationImpl::lock_iterator& it, MutationImpl *mut);
  void xlock_import(SimpleLock *lock);
  void xlock_downgrade(SimpleLock *lock, MutationImpl *mut);

  void try_simple_eval(SimpleLock *lock);
  bool simple_rdlock_try(SimpleLock *lock, MDSContext *con);

  bool simple_sync(SimpleLock *lock, bool *need_issue=0);

   // scatter
  void scatter_eval(ScatterLock *lock, bool *need_issue);        // public for MDCache::adjust_subtree_auth()

  void scatter_tick();
  void scatter_nudge(ScatterLock *lock, MDSContext *c, bool forcelockchange=false);

  void mark_updated_scatterlock(ScatterLock *lock);

  void handle_reqrdlock(SimpleLock *lock, const cref_t<MLock> &m);

  // caps

  // when to defer processing client cap release or writeback due to being
  // frozen.  the condition must be consistent across handle_client_caps and
  // process_request_cap_release to preserve ordering.
  bool should_defer_client_cap_frozen(CInode *in);

  void process_request_cap_release(MDRequestRef& mdr, client_t client, const ceph_mds_request_release& r,
				   std::string_view dname);

  void kick_cap_releases(MDRequestRef& mdr);
  void kick_issue_caps(CInode *in, client_t client, ceph_seq_t seq);

  void remove_client_cap(CInode *in, Capability *cap, bool kill=false);

  std::set<client_t> get_late_revoking_clients(double timeout) const;

  void snapflush_nudge(CInode *in);
  void mark_need_snapflush_inode(CInode *in);
  bool is_revoking_any_caps_from(client_t client);

  // local
  void local_wrlock_grab(LocalLockC *lock, MutationRef& mut);

  // file
  void file_eval(ScatterLock *lock, bool *need_issue);
  void file_recover(ScatterLock *lock);

  void mark_updated_Filelock(ScatterLock *lock);

  // -- file i/o --
  version_t issue_file_data_version(CInode *in);
  Capability* issue_new_caps(CInode *in, int mode, MDRequestRef& mdr, SnapRealm *conrealm);
  int issue_caps(CInode *in, Capability *only_cap=0);
  void issue_caps_set(std::set<CInode*>& inset);
  void issue_truncate(CInode *in);
  void revoke_stale_cap(CInode *in, client_t client);
  bool revoke_stale_caps(Session *session);
  void resume_stale_caps(Session *session);
  void remove_stale_leases(Session *session);

  void request_inode_file_caps(CInode *in);

  bool check_client_ranges(CInode *in, uint64_t size);
  bool calc_new_client_ranges(CInode *in, uint64_t size,
			      bool *max_increased=nullptr);
  bool check_inode_max_size(CInode *in, bool force_wrlock=false,
                            uint64_t newmax=0, uint64_t newsize=0,
			    utime_t mtime=utime_t());
  void share_inode_max_size(CInode *in, Capability *only_cap=0);

  // -- client leases --
  void handle_client_lease(const cref_t<MClientLease> &m);

  void issue_client_lease(CDentry *dn, MDRequestRef &mdr, int mask, utime_t now, bufferlist &bl);
  void revoke_client_leases(SimpleLock *lock);
  static void encode_lease(bufferlist& bl, const session_info_t& info, const LeaseStat& ls);

protected:
  void send_lock_message(SimpleLock *lock, int msg);
  void send_lock_message(SimpleLock *lock, int msg, const bufferlist &data);

  // -- locks --
  void _drop_locks(MutationImpl *mut, std::set<CInode*> *pneed_issue, bool drop_rdlocks);

  void simple_eval(SimpleLock *lock, bool *need_issue);
  void handle_simple_lock(SimpleLock *lock, const cref_t<MLock> &m);

  void simple_lock(SimpleLock *lock, bool *need_issue=0);
  void simple_excl(SimpleLock *lock, bool *need_issue=0);
  void simple_xlock(SimpleLock *lock);

  void handle_scatter_lock(ScatterLock *lock, const cref_t<MLock> &m);
  bool scatter_scatter_fastpath(ScatterLock *lock);
  void scatter_scatter(ScatterLock *lock, bool nowait=false);
  void scatter_tempsync(ScatterLock *lock, bool *need_issue=0);

  void scatter_writebehind(ScatterLock *lock);

  void scatter_writebehind_finish(ScatterLock *lock, MutationRef& mut);

  bool _need_flush_mdlog(CInode *in, int wanted_caps);
  void adjust_cap_wanted(Capability *cap, int wanted, int issue_seq);
  void handle_client_caps(const cref_t<MClientCaps> &m);
  void _update_cap_fields(CInode *in, int dirty, const cref_t<MClientCaps> &m, CInode::mempool_inode *pi);
  void _do_snap_update(CInode *in, snapid_t snap, int dirty, snapid_t follows, client_t client, const cref_t<MClientCaps> &m, const ref_t<MClientCaps> &ack);
  void _do_null_snapflush(CInode *head_in, client_t client, snapid_t last=CEPH_NOSNAP);
  bool _do_cap_update(CInode *in, Capability *cap, int dirty, snapid_t follows, const cref_t<MClientCaps> &m,
		      const ref_t<MClientCaps> &ack, bool *need_flush=NULL);
  void handle_client_cap_release(const cref_t<MClientCapRelease> &m);
  void _do_cap_release(client_t client, inodeno_t ino, uint64_t cap_id, ceph_seq_t mseq, ceph_seq_t seq);
  void caps_tick();

  bool local_wrlock_start(LocalLockC *lock, MDRequestRef& mut);
  void local_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
  bool local_xlock_start(LocalLockC *lock, MDRequestRef& mut);
  void local_xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);

  void handle_file_lock(ScatterLock *lock, const cref_t<MLock> &m);
  void scatter_mix(ScatterLock *lock, bool *need_issue=0);
  void file_excl(ScatterLock *lock, bool *need_issue=0);
  void file_xsyn(SimpleLock *lock, bool *need_issue=0);

  void handle_inode_file_caps(const cref_t<MInodeFileCaps> &m);

  void file_update_finish(CInode *in, MutationRef& mut, unsigned flags,
			  client_t client, const ref_t<MClientCaps> &ack);

  xlist<ScatterLock*> updated_scatterlocks;

  // Maintain a global list to quickly find if any caps are late revoking
  xlist<Capability*> revoking_caps;
  // Maintain a per-client list to find clients responsible for late ones quickly
  std::map<client_t, xlist<Capability*> > revoking_caps_by_client;

  elist<CInode*> need_snapflush_inodes;

private:
  friend class C_MDL_CheckMaxSize;
  friend class C_MDL_RequestInodeFileCaps;
  friend class C_Locker_FileUpdate_finish;
  friend class C_Locker_RetryCapRelease;
  friend class C_Locker_Eval;
  friend class C_Locker_ScatterWB;
  friend class LockerContext;
  friend class LockerLogContext;

  bool any_late_revoking_caps(xlist<Capability*> const &revoking, double timeout) const;
  uint64_t calc_new_max_size(const CInode::inode_const_ptr& pi, uint64_t size);

  MDSRank *mds;
  MDCache *mdcache;
  xlist<ScatterLock*> updated_filelocks;
};
#endif
Commit	Line	Data
7c673cae FG	1	// -- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t --
	2	// vim: ts=8 sw=2 smarttab
	3	/*
	4	* Ceph - scalable distributed file system
	5	*
	6	* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
	7	*
	8	* This is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License version 2.1, as published by the Free Software
	11	* Foundation. See file COPYING.
	12	*
	13	*/
	14
	15	#ifndef CEPH_MDS_LOCKER_H
	16	#define CEPH_MDS_LOCKER_H
	17
	18	#include "include/types.h"
	19
11fdf7f2 TL	20	#include "messages/MClientCaps.h"
	21	#include "messages/MClientCapRelease.h"
	22	#include "messages/MClientLease.h"
	23	#include "messages/MLock.h"
	24
9f95a23c TL	25	#include "CInode.h"
	26	#include "SimpleLock.h"
	27	#include "MDSContext.h"
	28	#include "Mutation.h"
	29	#include "messages/MClientReply.h"
	30
	31	struct SnapRealm;
7c673cae FG	32
	33	class MDSRank;
	34	class Session;
7c673cae	35	class CDentry;
7c673cae	36	class Capability;
7c673cae FG	37	class SimpleLock;
7c673cae FG	38	class ScatterLock;
f67539c2	39	class LocalLockC;
7c673cae	40
7c673cae	41	class Locker {
9f95a23c	42	public:
11fdf7f2	43	Locker(MDSRank m, MDCache c);
7c673cae	44
11fdf7f2	45	SimpleLock *get_lock(int lock_type, const MDSCacheObjectInfo &info);
7c673cae	46
9f95a23c TL	47	void dispatch(const cref_t<Message> &m);
9f95a23c TL	48	void handle_lock(const cref_t<MLock> &m);
7c673cae FG	49
	50	void tick();
	51
	52	void nudge_log(SimpleLock *lock);
	53
7c673cae	54	bool acquire_locks(MDRequestRef& mdr,
11fdf7f2	55	MutationImpl::LockOpVec& lov,
7c673cae	56	CInode *auth_pin_freeze=NULL,
9f95a23c TL	57	bool auth_pin_nonblocking=false);
	58
	59	bool try_rdlock_snap_layout(CInode *in, MDRequestRef& mdr,
	60	int n=0, bool want_layout=false);
7c673cae	61
224ce89b	62	void notify_freeze_waiter(MDSCacheObject *o);
11fdf7f2 TL	63	void cancel_locking(MutationImpl mut, std::set<CInode> *pneed_issue);
11fdf7f2 TL	64	void drop_locks(MutationImpl mut, std::set<CInode> *pneed_issue=0);
7c673cae	65	void set_xlocks_done(MutationImpl *mut, bool skip_dentry=false);
11fdf7f2	66	void drop_non_rdlocks(MutationImpl mut, std::set<CInode> *pneed_issue=0);
b32b8144	67	void drop_rdlocks_for_early_reply(MutationImpl *mut);
a8e16298	68	void drop_locks_for_fragment_unfreeze(MutationImpl *mut);
7c673cae	69
9f95a23c TL	70	int get_cap_bit_for_lock_cache(int op);
	71	void create_lock_cache(MDRequestRef& mdr, CInode diri, file_layout_t dir_layout=nullptr);
	72	bool find_and_attach_lock_cache(MDRequestRef& mdr, CInode *diri);
	73	void invalidate_lock_caches(CDir *dir);
	74	void invalidate_lock_caches(SimpleLock *lock);
	75	void invalidate_lock_cache(MDLockCache *lock_cache);
	76	void eval_lock_caches(Capability *cap);
	77	void put_lock_cache(MDLockCache* lock_cache);
	78
11fdf7f2	79	void eval_gather(SimpleLock lock, bool first=false, bool need_issue=0, MDSContext::vec *pfinishers=0);
7c673cae	80	void eval(SimpleLock lock, bool need_issue);
11fdf7f2	81	void eval_any(SimpleLock lock, bool need_issue, MDSContext::vec *pfinishers=0, bool first=false) {
7c673cae FG	82	if (!lock->is_stable())
	83	eval_gather(lock, first, need_issue, pfinishers);
	84	else if (lock->get_parent()->is_auth())
	85	eval(lock, need_issue);
	86	}
	87
	88	void eval_scatter_gathers(CInode *in);
	89
11fdf7f2	90	void eval_cap_gather(CInode in, std::set<CInode> *issue_set=0);
7c673cae FG	91
	92	bool eval(CInode *in, int mask, bool caps_imported=false);
	93	void try_eval(MDSCacheObject *p, int mask);
	94	void try_eval(SimpleLock lock, bool pneed_issue);
	95
	96	bool _rdlock_kick(SimpleLock *lock, bool as_anon);
9f95a23c	97	bool rdlock_try(SimpleLock *lock, client_t client);
7c673cae	98	bool rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon=false);
11fdf7f2	99	void rdlock_finish(const MutationImpl::lock_iterator& it, MutationImpl mut, bool pneed_issue);
9f95a23c TL	100	bool rdlock_try_set(MutationImpl::LockOpVec& lov, MDRequestRef& mdr);
9f95a23c TL	101	bool rdlock_try_set(MutationImpl::LockOpVec& lov, MutationRef& mut);
7c673cae FG	102
7c673cae FG	103	void wrlock_force(SimpleLock *lock, MutationRef& mut);
9f95a23c TL	104	bool wrlock_try(SimpleLock *lock, const MutationRef& mut, client_t client=-1);
9f95a23c TL	105	bool wrlock_start(const MutationImpl::LockOp &op, MDRequestRef& mut);
11fdf7f2	106	void wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl mut, bool pneed_issue);
7c673cae FG	107
7c673cae FG	108	void remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut);
11fdf7f2	109	void remote_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
7c673cae FG	110
	111	bool xlock_start(SimpleLock *lock, MDRequestRef& mut);
	112	void _finish_xlock(SimpleLock lock, client_t xlocker, bool pneed_issue);
11fdf7f2	113	void xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl mut, bool pneed_issue);
7c673cae	114
11fdf7f2	115	void xlock_export(const MutationImpl::lock_iterator& it, MutationImpl *mut);
7c673cae	116	void xlock_import(SimpleLock *lock);
9f95a23c	117	void xlock_downgrade(SimpleLock lock, MutationImpl mut);
7c673cae	118
7c673cae	119	void try_simple_eval(SimpleLock *lock);
11fdf7f2	120	bool simple_rdlock_try(SimpleLock lock, MDSContext con);
7c673cae	121
7c673cae	122	bool simple_sync(SimpleLock lock, bool need_issue=0);
7c673cae	123
9f95a23c	124	// scatter
7c673cae FG	125	void scatter_eval(ScatterLock lock, bool need_issue); // public for MDCache::adjust_subtree_auth()
	126
	127	void scatter_tick();
11fdf7f2	128	void scatter_nudge(ScatterLock lock, MDSContext c, bool forcelockchange=false);
7c673cae	129
7c673cae FG	130	void mark_updated_scatterlock(ScatterLock *lock);
7c673cae FG	131
9f95a23c	132	void handle_reqrdlock(SimpleLock *lock, const cref_t<MLock> &m);
7c673cae FG	133
	134	// caps
	135
	136	// when to defer processing client cap release or writeback due to being
	137	// frozen. the condition must be consistent across handle_client_caps and
	138	// process_request_cap_release to preserve ordering.
	139	bool should_defer_client_cap_frozen(CInode *in);
	140
	141	void process_request_cap_release(MDRequestRef& mdr, client_t client, const ceph_mds_request_release& r,
11fdf7f2	142	std::string_view dname);
7c673cae FG	143
	144	void kick_cap_releases(MDRequestRef& mdr);
	145	void kick_issue_caps(CInode *in, client_t client, ceph_seq_t seq);
	146
494da23a	147	void remove_client_cap(CInode in, Capability cap, bool kill=false);
7c673cae	148
9f95a23c	149	std::set<client_t> get_late_revoking_clients(double timeout) const;
7c673cae	150
11fdf7f2 TL	151	void snapflush_nudge(CInode *in);
11fdf7f2 TL	152	void mark_need_snapflush_inode(CInode *in);
494da23a	153	bool is_revoking_any_caps_from(client_t client);
11fdf7f2	154
7c673cae	155	// local
f67539c2	156	void local_wrlock_grab(LocalLockC *lock, MutationRef& mut);
7c673cae FG	157
7c673cae FG	158	// file
7c673cae	159	void file_eval(ScatterLock lock, bool need_issue);
7c673cae FG	160	void file_recover(ScatterLock *lock);
7c673cae FG	161
7c673cae FG	162	void mark_updated_Filelock(ScatterLock *lock);
	163
	164	// -- file i/o --
7c673cae	165	version_t issue_file_data_version(CInode *in);
9f95a23c	166	Capability* issue_new_caps(CInode in, int mode, MDRequestRef& mdr, SnapRealm conrealm);
81eedcae	167	int issue_caps(CInode in, Capability only_cap=0);
11fdf7f2	168	void issue_caps_set(std::set<CInode*>& inset);
7c673cae	169	void issue_truncate(CInode *in);
494da23a TL	170	void revoke_stale_cap(CInode *in, client_t client);
494da23a TL	171	bool revoke_stale_caps(Session *session);
7c673cae FG	172	void resume_stale_caps(Session *session);
	173	void remove_stale_leases(Session *session);
	174
7c673cae	175	void request_inode_file_caps(CInode *in);
7c673cae	176
f91f0fd5 TL	177	bool check_client_ranges(CInode *in, uint64_t size);
	178	bool calc_new_client_ranges(CInode *in, uint64_t size,
	179	bool *max_increased=nullptr);
7c673cae FG	180	bool check_inode_max_size(CInode *in, bool force_wrlock=false,
	181	uint64_t newmax=0, uint64_t newsize=0,
	182	utime_t mtime=utime_t());
	183	void share_inode_max_size(CInode in, Capability only_cap=0);
	184
9f95a23c TL	185	// -- client leases --
	186	void handle_client_lease(const cref_t<MClientLease> &m);
	187
	188	void issue_client_lease(CDentry *dn, MDRequestRef &mdr, int mask, utime_t now, bufferlist &bl);
	189	void revoke_client_leases(SimpleLock *lock);
	190	static void encode_lease(bufferlist& bl, const session_info_t& info, const LeaseStat& ls);
	191
	192	protected:
	193	void send_lock_message(SimpleLock *lock, int msg);
	194	void send_lock_message(SimpleLock *lock, int msg, const bufferlist &data);
	195
	196	// -- locks --
	197	void _drop_locks(MutationImpl mut, std::set<CInode> *pneed_issue, bool drop_rdlocks);
	198
	199	void simple_eval(SimpleLock lock, bool need_issue);
	200	void handle_simple_lock(SimpleLock *lock, const cref_t<MLock> &m);
	201
	202	void simple_lock(SimpleLock lock, bool need_issue=0);
	203	void simple_excl(SimpleLock lock, bool need_issue=0);
	204	void simple_xlock(SimpleLock *lock);
	205
	206	void handle_scatter_lock(ScatterLock *lock, const cref_t<MLock> &m);
	207	bool scatter_scatter_fastpath(ScatterLock *lock);
	208	void scatter_scatter(ScatterLock *lock, bool nowait=false);
	209	void scatter_tempsync(ScatterLock lock, bool need_issue=0);
	210
	211	void scatter_writebehind(ScatterLock *lock);
	212
	213	void scatter_writebehind_finish(ScatterLock *lock, MutationRef& mut);
	214
	215	bool _need_flush_mdlog(CInode *in, int wanted_caps);
	216	void adjust_cap_wanted(Capability *cap, int wanted, int issue_seq);
	217	void handle_client_caps(const cref_t<MClientCaps> &m);
	218	void _update_cap_fields(CInode in, int dirty, const cref_t<MClientCaps> &m, CInode::mempool_inode pi);
	219	void _do_snap_update(CInode *in, snapid_t snap, int dirty, snapid_t follows, client_t client, const cref_t<MClientCaps> &m, const ref_t<MClientCaps> &ack);
	220	void _do_null_snapflush(CInode *head_in, client_t client, snapid_t last=CEPH_NOSNAP);
	221	bool _do_cap_update(CInode in, Capability cap, int dirty, snapid_t follows, const cref_t<MClientCaps> &m,
	222	const ref_t<MClientCaps> &ack, bool *need_flush=NULL);
	223	void handle_client_cap_release(const cref_t<MClientCapRelease> &m);
	224	void _do_cap_release(client_t client, inodeno_t ino, uint64_t cap_id, ceph_seq_t mseq, ceph_seq_t seq);
	225	void caps_tick();
	226
f67539c2	227	bool local_wrlock_start(LocalLockC *lock, MDRequestRef& mut);
9f95a23c	228	void local_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
f67539c2	229	bool local_xlock_start(LocalLockC *lock, MDRequestRef& mut);
9f95a23c TL	230	void local_xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
	231
	232	void handle_file_lock(ScatterLock *lock, const cref_t<MLock> &m);
	233	void scatter_mix(ScatterLock lock, bool need_issue=0);
	234	void file_excl(ScatterLock lock, bool need_issue=0);
	235	void file_xsyn(SimpleLock lock, bool need_issue=0);
	236
	237	void handle_inode_file_caps(const cref_t<MInodeFileCaps> &m);
	238
	239	void file_update_finish(CInode *in, MutationRef& mut, unsigned flags,
	240	client_t client, const ref_t<MClientCaps> &ack);
	241
	242	xlist<ScatterLock*> updated_scatterlocks;
	243
	244	// Maintain a global list to quickly find if any caps are late revoking
	245	xlist<Capability*> revoking_caps;
	246	// Maintain a per-client list to find clients responsible for late ones quickly
	247	std::map<client_t, xlist<Capability*> > revoking_caps_by_client;
	248
	249	elist<CInode*> need_snapflush_inodes;
	250
7c673cae FG	251	private:
	252	friend class C_MDL_CheckMaxSize;
	253	friend class C_MDL_RequestInodeFileCaps;
	254	friend class C_Locker_FileUpdate_finish;
	255	friend class C_Locker_RetryCapRelease;
	256	friend class C_Locker_Eval;
	257	friend class C_Locker_ScatterWB;
	258	friend class LockerContext;
	259	friend class LockerLogContext;
	260
9f95a23c	261	bool any_late_revoking_caps(xlist<Capability*> const &revoking, double timeout) const;
f67539c2	262	uint64_t calc_new_max_size(const CInode::inode_const_ptr& pi, uint64_t size);
7c673cae	263
9f95a23c TL	264	MDSRank *mds;
	265	MDCache *mdcache;
	266	xlist<ScatterLock*> updated_filelocks;
7c673cae	267	};
7c673cae	268	#endif