mirror of
https://github.com/ceph/ceph
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269 lines
10 KiB
C++
269 lines
10 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_MDS_LOCKER_H
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#define CEPH_MDS_LOCKER_H
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#include "include/types.h"
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#include "messages/MClientCaps.h"
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#include "messages/MClientCapRelease.h"
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#include "messages/MClientLease.h"
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#include "messages/MLock.h"
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#include "CInode.h"
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#include "SimpleLock.h"
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#include "MDSContext.h"
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#include "Mutation.h"
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#include "messages/MClientReply.h"
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struct SnapRealm;
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class MDSRank;
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class Session;
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class CDentry;
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class Capability;
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class SimpleLock;
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class ScatterLock;
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class LocalLockC;
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class Locker {
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public:
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Locker(MDSRank *m, MDCache *c);
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SimpleLock *get_lock(int lock_type, const MDSCacheObjectInfo &info);
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void dispatch(const cref_t<Message> &m);
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void handle_lock(const cref_t<MLock> &m);
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void tick();
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void nudge_log(SimpleLock *lock);
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bool acquire_locks(MDRequestRef& mdr,
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MutationImpl::LockOpVec& lov,
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CInode *auth_pin_freeze=NULL,
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bool auth_pin_nonblocking=false);
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bool try_rdlock_snap_layout(CInode *in, MDRequestRef& mdr,
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int n=0, bool want_layout=false);
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void notify_freeze_waiter(MDSCacheObject *o);
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void cancel_locking(MutationImpl *mut, std::set<CInode*> *pneed_issue);
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void drop_locks(MutationImpl *mut, std::set<CInode*> *pneed_issue=0);
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void set_xlocks_done(MutationImpl *mut, bool skip_dentry=false);
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void drop_non_rdlocks(MutationImpl *mut, std::set<CInode*> *pneed_issue=0);
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void drop_rdlocks_for_early_reply(MutationImpl *mut);
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void drop_locks_for_fragment_unfreeze(MutationImpl *mut);
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int get_cap_bit_for_lock_cache(int op);
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void create_lock_cache(MDRequestRef& mdr, CInode *diri, file_layout_t *dir_layout=nullptr);
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bool find_and_attach_lock_cache(MDRequestRef& mdr, CInode *diri);
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void invalidate_lock_caches(CDir *dir);
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void invalidate_lock_caches(SimpleLock *lock);
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void invalidate_lock_cache(MDLockCache *lock_cache);
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void eval_lock_caches(Capability *cap);
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void put_lock_cache(MDLockCache* lock_cache);
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void eval_gather(SimpleLock *lock, bool first=false, bool *need_issue=0, MDSContext::vec *pfinishers=0);
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void eval(SimpleLock *lock, bool *need_issue);
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void eval_any(SimpleLock *lock, bool *need_issue, MDSContext::vec *pfinishers=0, bool first=false) {
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if (!lock->is_stable())
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eval_gather(lock, first, need_issue, pfinishers);
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else if (lock->get_parent()->is_auth())
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eval(lock, need_issue);
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}
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void eval_scatter_gathers(CInode *in);
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void eval_cap_gather(CInode *in, std::set<CInode*> *issue_set=0);
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bool eval(CInode *in, int mask, bool caps_imported=false);
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void try_eval(MDSCacheObject *p, int mask);
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void try_eval(SimpleLock *lock, bool *pneed_issue);
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bool _rdlock_kick(SimpleLock *lock, bool as_anon);
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bool rdlock_try(SimpleLock *lock, client_t client);
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bool rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon=false);
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void rdlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);
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bool rdlock_try_set(MutationImpl::LockOpVec& lov, MDRequestRef& mdr);
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bool rdlock_try_set(MutationImpl::LockOpVec& lov, MutationRef& mut);
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void wrlock_force(SimpleLock *lock, MutationRef& mut);
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bool wrlock_try(SimpleLock *lock, const MutationRef& mut, client_t client=-1);
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bool wrlock_start(const MutationImpl::LockOp &op, MDRequestRef& mut);
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void wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);
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void remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut);
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void remote_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
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bool xlock_start(SimpleLock *lock, MDRequestRef& mut);
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void _finish_xlock(SimpleLock *lock, client_t xlocker, bool *pneed_issue);
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void xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut, bool *pneed_issue);
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void xlock_export(const MutationImpl::lock_iterator& it, MutationImpl *mut);
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void xlock_import(SimpleLock *lock);
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void xlock_downgrade(SimpleLock *lock, MutationImpl *mut);
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void try_simple_eval(SimpleLock *lock);
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bool simple_rdlock_try(SimpleLock *lock, MDSContext *con);
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bool simple_sync(SimpleLock *lock, bool *need_issue=0);
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// scatter
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void scatter_eval(ScatterLock *lock, bool *need_issue); // public for MDCache::adjust_subtree_auth()
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void scatter_tick();
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void scatter_nudge(ScatterLock *lock, MDSContext *c, bool forcelockchange=false);
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void mark_updated_scatterlock(ScatterLock *lock);
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void handle_reqrdlock(SimpleLock *lock, const cref_t<MLock> &m);
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// caps
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// when to defer processing client cap release or writeback due to being
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// frozen. the condition must be consistent across handle_client_caps and
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// process_request_cap_release to preserve ordering.
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bool should_defer_client_cap_frozen(CInode *in);
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void process_request_cap_release(MDRequestRef& mdr, client_t client, const ceph_mds_request_release& r,
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std::string_view dname);
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void kick_cap_releases(MDRequestRef& mdr);
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void kick_issue_caps(CInode *in, client_t client, ceph_seq_t seq);
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void remove_client_cap(CInode *in, Capability *cap, bool kill=false);
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std::set<client_t> get_late_revoking_clients(double timeout) const;
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void snapflush_nudge(CInode *in);
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void mark_need_snapflush_inode(CInode *in);
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bool is_revoking_any_caps_from(client_t client);
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// local
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void local_wrlock_grab(LocalLockC *lock, MutationRef& mut);
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// file
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void file_eval(ScatterLock *lock, bool *need_issue);
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void file_recover(ScatterLock *lock);
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void mark_updated_Filelock(ScatterLock *lock);
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// -- file i/o --
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version_t issue_file_data_version(CInode *in);
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Capability* issue_new_caps(CInode *in, int mode, MDRequestRef& mdr, SnapRealm *conrealm);
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int issue_caps(CInode *in, Capability *only_cap=0);
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void issue_caps_set(std::set<CInode*>& inset);
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void issue_truncate(CInode *in);
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void revoke_stale_cap(CInode *in, client_t client);
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bool revoke_stale_caps(Session *session);
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void resume_stale_caps(Session *session);
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void remove_stale_leases(Session *session);
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void request_inode_file_caps(CInode *in);
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bool check_client_ranges(CInode *in, uint64_t size);
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bool calc_new_client_ranges(CInode *in, uint64_t size,
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bool *max_increased=nullptr);
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bool check_inode_max_size(CInode *in, bool force_wrlock=false,
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uint64_t newmax=0, uint64_t newsize=0,
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utime_t mtime=utime_t());
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void share_inode_max_size(CInode *in, Capability *only_cap=0);
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// -- client leases --
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void handle_client_lease(const cref_t<MClientLease> &m);
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void issue_client_lease(CDentry *dn, MDRequestRef &mdr, int mask, utime_t now, bufferlist &bl);
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void revoke_client_leases(SimpleLock *lock);
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static void encode_lease(bufferlist& bl, const session_info_t& info, const LeaseStat& ls);
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protected:
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void send_lock_message(SimpleLock *lock, int msg);
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void send_lock_message(SimpleLock *lock, int msg, const bufferlist &data);
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// -- locks --
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void _drop_locks(MutationImpl *mut, std::set<CInode*> *pneed_issue, bool drop_rdlocks);
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void simple_eval(SimpleLock *lock, bool *need_issue);
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void handle_simple_lock(SimpleLock *lock, const cref_t<MLock> &m);
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void simple_lock(SimpleLock *lock, bool *need_issue=0);
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void simple_excl(SimpleLock *lock, bool *need_issue=0);
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void simple_xlock(SimpleLock *lock);
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void handle_scatter_lock(ScatterLock *lock, const cref_t<MLock> &m);
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bool scatter_scatter_fastpath(ScatterLock *lock);
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void scatter_scatter(ScatterLock *lock, bool nowait=false);
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void scatter_tempsync(ScatterLock *lock, bool *need_issue=0);
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void scatter_writebehind(ScatterLock *lock);
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void scatter_writebehind_finish(ScatterLock *lock, MutationRef& mut);
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bool _need_flush_mdlog(CInode *in, int wanted_caps);
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void adjust_cap_wanted(Capability *cap, int wanted, int issue_seq);
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void handle_client_caps(const cref_t<MClientCaps> &m);
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void _update_cap_fields(CInode *in, int dirty, const cref_t<MClientCaps> &m, CInode::mempool_inode *pi);
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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);
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void _do_null_snapflush(CInode *head_in, client_t client, snapid_t last=CEPH_NOSNAP);
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bool _do_cap_update(CInode *in, Capability *cap, int dirty, snapid_t follows, const cref_t<MClientCaps> &m,
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const ref_t<MClientCaps> &ack, bool *need_flush=NULL);
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void handle_client_cap_release(const cref_t<MClientCapRelease> &m);
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void _do_cap_release(client_t client, inodeno_t ino, uint64_t cap_id, ceph_seq_t mseq, ceph_seq_t seq);
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void caps_tick();
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bool local_wrlock_start(LocalLockC *lock, MDRequestRef& mut);
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void local_wrlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
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bool local_xlock_start(LocalLockC *lock, MDRequestRef& mut);
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void local_xlock_finish(const MutationImpl::lock_iterator& it, MutationImpl *mut);
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void handle_file_lock(ScatterLock *lock, const cref_t<MLock> &m);
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void scatter_mix(ScatterLock *lock, bool *need_issue=0);
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void file_excl(ScatterLock *lock, bool *need_issue=0);
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void file_xsyn(SimpleLock *lock, bool *need_issue=0);
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void handle_inode_file_caps(const cref_t<MInodeFileCaps> &m);
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void file_update_finish(CInode *in, MutationRef& mut, unsigned flags,
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client_t client, const ref_t<MClientCaps> &ack);
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xlist<ScatterLock*> updated_scatterlocks;
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// Maintain a global list to quickly find if any caps are late revoking
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xlist<Capability*> revoking_caps;
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// Maintain a per-client list to find clients responsible for late ones quickly
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std::map<client_t, xlist<Capability*> > revoking_caps_by_client;
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elist<CInode*> need_snapflush_inodes;
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private:
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friend class C_MDL_CheckMaxSize;
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friend class C_MDL_RequestInodeFileCaps;
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friend class C_Locker_FileUpdate_finish;
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friend class C_Locker_RetryCapRelease;
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friend class C_Locker_Eval;
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friend class C_Locker_ScatterWB;
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friend class LockerContext;
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friend class LockerLogContext;
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bool any_late_revoking_caps(xlist<Capability*> const &revoking, double timeout) const;
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uint64_t calc_new_max_size(const CInode::inode_const_ptr& pi, uint64_t size);
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MDSRank *mds;
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MDCache *mdcache;
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xlist<ScatterLock*> updated_filelocks;
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};
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#endif
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