+++ /dev/null
-// -*- 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 <map>
-#include <list>
-#include <set>
-using std::map;
-using std::list;
-using std::set;
-
-class MDSRank;
-class Session;
-class CInode;
-class CDentry;
-struct SnapRealm;
-
-class Message;
-
-class MLock;
-
-class Capability;
-
-class SimpleLock;
-class ScatterLock;
-class LocalLock;
-
-#include "SimpleLock.h"
-#include "Mutation.h"
-
-class Locker {
-private:
- MDSRank *mds;
- MDCache *mdcache;
-
- public:
- Locker(MDSRank *m, MDCache *c) : mds(m), mdcache(c) {}
-
- SimpleLock *get_lock(int lock_type, MDSCacheObjectInfo &info);
-
- void dispatch(Message *m);
- void handle_lock(MLock *m);
-
- void tick();
-
- void nudge_log(SimpleLock *lock);
-
-protected:
- void send_lock_message(SimpleLock *lock, int msg);
- void send_lock_message(SimpleLock *lock, int msg, const bufferlist &data);
-
- // -- locks --
- void _drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue);
- void _drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue);
-public:
- void include_snap_rdlocks(set<SimpleLock*>& rdlocks, CInode *in);
- void include_snap_rdlocks_wlayout(set<SimpleLock*>& rdlocks, CInode *in,
- file_layout_t **layout);
-
- bool acquire_locks(MDRequestRef& mdr,
- set<SimpleLock*> &rdlocks,
- set<SimpleLock*> &wrlocks,
- set<SimpleLock*> &xlocks,
- map<SimpleLock*,mds_rank_t> *remote_wrlocks=NULL,
- CInode *auth_pin_freeze=NULL,
- bool auth_pin_nonblock=false);
-
- void notify_freeze_waiter(MDSCacheObject *o);
- void cancel_locking(MutationImpl *mut, set<CInode*> *pneed_issue);
- void drop_locks(MutationImpl *mut, set<CInode*> *pneed_issue=0);
- void set_xlocks_done(MutationImpl *mut, bool skip_dentry=false);
- void drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue=0);
- void drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue=0);
-
- void eval_gather(SimpleLock *lock, bool first=false, bool *need_issue=0, list<MDSInternalContextBase*> *pfinishers=0);
- void eval(SimpleLock *lock, bool *need_issue);
- void eval_any(SimpleLock *lock, bool *need_issue, list<MDSInternalContextBase*> *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, 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, MDSInternalContextBase *c);
- bool rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon=false);
- void rdlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue);
- bool can_rdlock_set(set<SimpleLock*>& locks);
- bool rdlock_try_set(set<SimpleLock*>& locks);
- void rdlock_take_set(set<SimpleLock*>& locks, MutationRef& mut);
-
- void wrlock_force(SimpleLock *lock, MutationRef& mut);
- bool wrlock_start(SimpleLock *lock, MDRequestRef& mut, bool nowait=false);
- void wrlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue);
-
- void remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut);
- void remote_wrlock_finish(SimpleLock *lock, mds_rank_t target, MutationImpl *mut);
-
- bool xlock_start(SimpleLock *lock, MDRequestRef& mut);
- void _finish_xlock(SimpleLock *lock, client_t xlocker, bool *pneed_issue);
- void xlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue);
-
- void xlock_export(SimpleLock *lock, MutationImpl *mut);
- void xlock_import(SimpleLock *lock);
-
-
- // simple
-public:
- void try_simple_eval(SimpleLock *lock);
- bool simple_rdlock_try(SimpleLock *lock, MDSInternalContextBase *con);
-protected:
- void simple_eval(SimpleLock *lock, bool *need_issue);
- void handle_simple_lock(SimpleLock *lock, MLock *m);
-
-public:
- bool simple_sync(SimpleLock *lock, bool *need_issue=0);
-protected:
- void simple_lock(SimpleLock *lock, bool *need_issue=0);
- void simple_excl(SimpleLock *lock, bool *need_issue=0);
- void simple_xlock(SimpleLock *lock);
-
-
- // scatter
-public:
- void scatter_eval(ScatterLock *lock, bool *need_issue); // public for MDCache::adjust_subtree_auth()
-
- void scatter_tick();
- void scatter_nudge(ScatterLock *lock, MDSInternalContextBase *c, bool forcelockchange=false);
-
-protected:
- void handle_scatter_lock(ScatterLock *lock, 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);
-
- xlist<ScatterLock*> updated_scatterlocks;
-public:
- void mark_updated_scatterlock(ScatterLock *lock);
-
-
- void handle_reqrdlock(SimpleLock *lock, 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,
- const string &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, client_t client);
-
- void get_late_revoking_clients(std::list<client_t> *result) const;
- bool any_late_revoking_caps(xlist<Capability*> const &revoking) const;
-
- protected:
- bool _need_flush_mdlog(CInode *in, int wanted_caps);
- void adjust_cap_wanted(Capability *cap, int wanted, int issue_seq);
- void handle_client_caps(class MClientCaps *m);
- void _update_cap_fields(CInode *in, int dirty, MClientCaps *m, inode_t *pi);
- void _do_snap_update(CInode *in, snapid_t snap, int dirty, snapid_t follows, client_t client, MClientCaps *m, 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, MClientCaps *m,
- MClientCaps *ack=0, bool *need_flush=NULL);
- void handle_client_cap_release(class 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();
-
- // 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;
-
- // local
-public:
- void local_wrlock_grab(LocalLock *lock, MutationRef& mut);
-protected:
- bool local_wrlock_start(LocalLock *lock, MDRequestRef& mut);
- void local_wrlock_finish(LocalLock *lock, MutationImpl *mut);
- bool local_xlock_start(LocalLock *lock, MDRequestRef& mut);
- void local_xlock_finish(LocalLock *lock, MutationImpl *mut);
-
-
- // file
-public:
- void file_eval(ScatterLock *lock, bool *need_issue);
-protected:
- void handle_file_lock(ScatterLock *lock, 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);
-
-public:
- void file_recover(ScatterLock *lock);
-
-private:
- xlist<ScatterLock*> updated_filelocks;
-public:
- void mark_updated_Filelock(ScatterLock *lock);
-
- // -- file i/o --
-public:
- version_t issue_file_data_version(CInode *in);
- Capability* issue_new_caps(CInode *in, int mode, Session *session, SnapRealm *conrealm, bool is_replay);
- bool issue_caps(CInode *in, Capability *only_cap=0);
- void issue_caps_set(set<CInode*>& inset);
- void issue_truncate(CInode *in);
- void revoke_stale_caps(Session *session);
- void revoke_stale_caps(Capability *cap);
- void resume_stale_caps(Session *session);
- void remove_stale_leases(Session *session);
-
-public:
- void request_inode_file_caps(CInode *in);
-protected:
- void handle_inode_file_caps(class MInodeFileCaps *m);
-
- void file_update_finish(CInode *in, MutationRef& mut, bool share_max, bool issue_client_cap,
- client_t client, MClientCaps *ack);
-private:
- uint64_t calc_new_max_size(inode_t *pi, uint64_t size);
-public:
- void calc_new_client_ranges(CInode *in, uint64_t size,
- map<client_t, client_writeable_range_t>* new_ranges,
- bool *max_increased);
- 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);
-
-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;
-
-
- // -- client leases --
-public:
- void handle_client_lease(struct MClientLease *m);
-
- void issue_client_lease(CDentry *dn, client_t client, bufferlist &bl, utime_t now, Session *session);
- void revoke_client_leases(SimpleLock *lock);
-};
-
-
-#endif
Code Review / stor4nfv.git / blobdiff