--- /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_MDCACHE_H
+#define CEPH_MDCACHE_H
+
+#include "include/types.h"
+#include "include/filepath.h"
+#include "include/elist.h"
+
+#include "osdc/Filer.h"
+#include "CInode.h"
+#include "CDentry.h"
+#include "CDir.h"
+#include "include/Context.h"
+#include "events/EMetaBlob.h"
+#include "RecoveryQueue.h"
+#include "StrayManager.h"
+#include "MDSContext.h"
+#include "MDSMap.h"
+#include "Mutation.h"
+
+#include "messages/MClientRequest.h"
+#include "messages/MMDSSlaveRequest.h"
+
+class PerfCounters;
+
+class MDSRank;
+class Session;
+class Migrator;
+
+class Message;
+class Session;
+
+class MMDSResolve;
+class MMDSResolveAck;
+class MMDSCacheRejoin;
+class MDiscover;
+class MDiscoverReply;
+class MCacheExpire;
+class MDirUpdate;
+class MDentryLink;
+class MDentryUnlink;
+class MLock;
+struct MMDSFindIno;
+struct MMDSFindInoReply;
+struct MMDSOpenIno;
+struct MMDSOpenInoReply;
+
+class Message;
+class MClientRequest;
+class MMDSSlaveRequest;
+struct MClientSnap;
+
+class MMDSFragmentNotify;
+
+class ESubtreeMap;
+
+enum {
+ l_mdc_first = 3000,
+ // How many inodes currently in stray dentries
+ l_mdc_num_strays,
+ // How many stray dentries are currently delayed for purge due to refs
+ l_mdc_num_strays_delayed,
+ // How many stray dentries are currently being enqueued for purge
+ l_mdc_num_strays_enqueuing,
+
+ // How many dentries have ever been added to stray dir
+ l_mdc_strays_created,
+ // How many dentries have been passed on to PurgeQueue
+ l_mdc_strays_enqueued,
+ // How many strays have been reintegrated?
+ l_mdc_strays_reintegrated,
+ // How many strays have been migrated?
+ l_mdc_strays_migrated,
+
+ // How many inode sizes currently being recovered
+ l_mdc_num_recovering_processing,
+ // How many inodes currently waiting to have size recovered
+ l_mdc_num_recovering_enqueued,
+ // How many inodes waiting with elevated priority for recovery
+ l_mdc_num_recovering_prioritized,
+ // How many inodes ever started size recovery
+ l_mdc_recovery_started,
+ // How many inodes ever completed size recovery
+ l_mdc_recovery_completed,
+
+ l_mdss_ireq_enqueue_scrub,
+ l_mdss_ireq_exportdir,
+ l_mdss_ireq_flush,
+ l_mdss_ireq_fragmentdir,
+ l_mdss_ireq_fragstats,
+ l_mdss_ireq_inodestats,
+
+ l_mdc_last,
+};
+
+
+// flags for predirty_journal_parents()
+static const int PREDIRTY_PRIMARY = 1; // primary dn, adjust nested accounting
+static const int PREDIRTY_DIR = 2; // update parent dir mtime/size
+static const int PREDIRTY_SHALLOW = 4; // only go to immediate parent (for easier rollback)
+
+class MDCache {
+ public:
+ // my master
+ MDSRank *mds;
+
+ // -- my cache --
+ LRU lru; // dentry lru for expiring items from cache
+ LRU bottom_lru; // dentries that should be trimmed ASAP
+ protected:
+ ceph::unordered_map<vinodeno_t,CInode*> inode_map; // map of inodes by ino
+ CInode *root; // root inode
+ CInode *myin; // .ceph/mds%d dir
+
+ bool readonly;
+ void set_readonly() { readonly = true; }
+
+ CInode *strays[NUM_STRAY]; // my stray dir
+ int stray_index;
+
+ CInode *get_stray() {
+ return strays[stray_index];
+ }
+
+ set<CInode*> base_inodes;
+
+ std::unique_ptr<PerfCounters> logger;
+
+ Filer filer;
+
+ bool exceeded_size_limit;
+
+public:
+ static uint64_t cache_limit_inodes(void) {
+ return g_conf->get_val<int64_t>("mds_cache_size");
+ }
+ static uint64_t cache_limit_memory(void) {
+ return g_conf->get_val<uint64_t>("mds_cache_memory_limit");
+ }
+ static double cache_reservation(void) {
+ return g_conf->get_val<double>("mds_cache_reservation");
+ }
+ static double cache_mid(void) {
+ return g_conf->get_val<double>("mds_cache_mid");
+ }
+ static double cache_health_threshold(void) {
+ return g_conf->get_val<double>("mds_health_cache_threshold");
+ }
+ double cache_toofull_ratio(void) const {
+ uint64_t inode_limit = cache_limit_inodes();
+ double inode_reserve = inode_limit*(1.0-cache_reservation());
+ double memory_reserve = cache_limit_memory()*(1.0-cache_reservation());
+ return fmax(0.0, fmax((cache_size()-memory_reserve)/memory_reserve, inode_limit == 0 ? 0.0 : (CInode::count()-inode_reserve)/inode_reserve));
+ }
+ bool cache_toofull(void) const {
+ return cache_toofull_ratio() > 0.0;
+ }
+ uint64_t cache_size(void) const {
+ return mempool::get_pool(mempool::mds_co::id).allocated_bytes();
+ }
+ bool cache_overfull(void) const {
+ uint64_t inode_limit = cache_limit_inodes();
+ return (inode_limit > 0 && CInode::count() > inode_limit*cache_health_threshold()) || (cache_size() > cache_limit_memory()*cache_health_threshold());
+ }
+
+ void advance_stray() {
+ stray_index = (stray_index+1)%NUM_STRAY;
+ }
+
+ void activate_stray_manager();
+
+ /**
+ * Call this when you know that a CDentry is ready to be passed
+ * on to StrayManager (i.e. this is a stray you've just created)
+ */
+ void notify_stray(CDentry *dn) {
+ assert(dn->get_dir()->get_inode()->is_stray());
+ stray_manager.eval_stray(dn);
+ }
+
+ void maybe_eval_stray(CInode *in, bool delay=false);
+ void clear_dirty_bits_for_stray(CInode* diri);
+
+ bool is_readonly() { return readonly; }
+ void force_readonly();
+
+ DecayRate decayrate;
+
+ int num_inodes_with_caps;
+
+ unsigned max_dir_commit_size;
+
+ static file_layout_t gen_default_file_layout(const MDSMap &mdsmap);
+ static file_layout_t gen_default_log_layout(const MDSMap &mdsmap);
+
+ file_layout_t default_file_layout;
+ file_layout_t default_log_layout;
+
+ void register_perfcounters();
+
+ // -- client leases --
+public:
+ static const int client_lease_pools = 3;
+ float client_lease_durations[client_lease_pools];
+protected:
+ xlist<ClientLease*> client_leases[client_lease_pools];
+public:
+ void touch_client_lease(ClientLease *r, int pool, utime_t ttl) {
+ client_leases[pool].push_back(&r->item_lease);
+ r->ttl = ttl;
+ }
+
+ void notify_stray_removed()
+ {
+ stray_manager.notify_stray_removed();
+ }
+
+ void notify_stray_created()
+ {
+ stray_manager.notify_stray_created();
+ }
+
+ void eval_remote(CDentry *dn)
+ {
+ stray_manager.eval_remote(dn);
+ }
+
+ // -- client caps --
+ uint64_t last_cap_id;
+
+
+
+ // -- discover --
+ struct discover_info_t {
+ ceph_tid_t tid;
+ mds_rank_t mds;
+ inodeno_t ino;
+ frag_t frag;
+ snapid_t snap;
+ filepath want_path;
+ CInode *basei;
+ bool want_base_dir;
+ bool want_xlocked;
+
+ discover_info_t() :
+ tid(0), mds(-1), snap(CEPH_NOSNAP), basei(NULL),
+ want_base_dir(false), want_xlocked(false) {}
+ ~discover_info_t() {
+ if (basei)
+ basei->put(MDSCacheObject::PIN_DISCOVERBASE);
+ }
+ void pin_base(CInode *b) {
+ basei = b;
+ basei->get(MDSCacheObject::PIN_DISCOVERBASE);
+ }
+ };
+
+ map<ceph_tid_t, discover_info_t> discovers;
+ ceph_tid_t discover_last_tid;
+
+ void _send_discover(discover_info_t& dis);
+ discover_info_t& _create_discover(mds_rank_t mds) {
+ ceph_tid_t t = ++discover_last_tid;
+ discover_info_t& d = discovers[t];
+ d.tid = t;
+ d.mds = mds;
+ return d;
+ }
+
+ // waiters
+ map<int, map<inodeno_t, list<MDSInternalContextBase*> > > waiting_for_base_ino;
+
+ void discover_base_ino(inodeno_t want_ino, MDSInternalContextBase *onfinish, mds_rank_t from=MDS_RANK_NONE);
+ void discover_dir_frag(CInode *base, frag_t approx_fg, MDSInternalContextBase *onfinish,
+ mds_rank_t from=MDS_RANK_NONE);
+ void discover_path(CInode *base, snapid_t snap, filepath want_path, MDSInternalContextBase *onfinish,
+ bool want_xlocked=false, mds_rank_t from=MDS_RANK_NONE);
+ void discover_path(CDir *base, snapid_t snap, filepath want_path, MDSInternalContextBase *onfinish,
+ bool want_xlocked=false);
+ void kick_discovers(mds_rank_t who); // after a failure.
+
+
+ // -- subtrees --
+protected:
+ /* subtree keys and each tree's non-recursive nested subtrees (the "bounds") */
+ map<CDir*,set<CDir*> > subtrees;
+ map<CInode*,list<pair<CDir*,CDir*> > > projected_subtree_renames; // renamed ino -> target dir
+
+ // adjust subtree auth specification
+ // dir->dir_auth
+ // imports/exports/nested_exports
+ // join/split subtrees as appropriate
+public:
+ bool is_subtrees() { return !subtrees.empty(); }
+ void list_subtrees(list<CDir*>& ls);
+ void adjust_subtree_auth(CDir *root, mds_authority_t auth);
+ void adjust_subtree_auth(CDir *root, mds_rank_t a, mds_rank_t b=CDIR_AUTH_UNKNOWN) {
+ adjust_subtree_auth(root, mds_authority_t(a,b));
+ }
+ void adjust_bounded_subtree_auth(CDir *dir, set<CDir*>& bounds, mds_authority_t auth);
+ void adjust_bounded_subtree_auth(CDir *dir, set<CDir*>& bounds, mds_rank_t a) {
+ adjust_bounded_subtree_auth(dir, bounds, mds_authority_t(a, CDIR_AUTH_UNKNOWN));
+ }
+ void adjust_bounded_subtree_auth(CDir *dir, vector<dirfrag_t>& bounds, mds_authority_t auth);
+ void adjust_bounded_subtree_auth(CDir *dir, vector<dirfrag_t>& bounds, mds_rank_t a) {
+ adjust_bounded_subtree_auth(dir, bounds, mds_authority_t(a, CDIR_AUTH_UNKNOWN));
+ }
+ void map_dirfrag_set(list<dirfrag_t>& dfs, set<CDir*>& result);
+ void try_subtree_merge(CDir *root);
+ void try_subtree_merge_at(CDir *root, set<CInode*> *to_eval);
+ void subtree_merge_writebehind_finish(CInode *in, MutationRef& mut);
+ void eval_subtree_root(CInode *diri);
+ CDir *get_subtree_root(CDir *dir);
+ CDir *get_projected_subtree_root(CDir *dir);
+ bool is_leaf_subtree(CDir *dir) {
+ assert(subtrees.count(dir));
+ return subtrees[dir].empty();
+ }
+ void remove_subtree(CDir *dir);
+ bool is_subtree(CDir *root) {
+ return subtrees.count(root);
+ }
+ void get_subtree_bounds(CDir *root, set<CDir*>& bounds);
+ void get_wouldbe_subtree_bounds(CDir *root, set<CDir*>& bounds);
+ void verify_subtree_bounds(CDir *root, const set<CDir*>& bounds);
+ void verify_subtree_bounds(CDir *root, const list<dirfrag_t>& bounds);
+
+ void project_subtree_rename(CInode *diri, CDir *olddir, CDir *newdir);
+ void adjust_subtree_after_rename(CInode *diri, CDir *olddir, bool pop);
+
+ void get_auth_subtrees(set<CDir*>& s);
+ void get_fullauth_subtrees(set<CDir*>& s);
+
+ int num_subtrees();
+ int num_subtrees_fullauth();
+ int num_subtrees_fullnonauth();
+
+
+protected:
+ // delayed cache expire
+ map<CDir*, map<mds_rank_t, MCacheExpire*> > delayed_expire; // subtree root -> expire msg
+
+
+ // -- requests --
+ ceph::unordered_map<metareqid_t, MDRequestRef> active_requests;
+
+public:
+ int get_num_client_requests();
+
+ MDRequestRef request_start(MClientRequest *req);
+ MDRequestRef request_start_slave(metareqid_t rid, __u32 attempt, Message *m);
+ MDRequestRef request_start_internal(int op);
+ bool have_request(metareqid_t rid) {
+ return active_requests.count(rid);
+ }
+ MDRequestRef request_get(metareqid_t rid);
+ void request_pin_ref(MDRequestRef& r, CInode *ref, vector<CDentry*>& trace);
+ void request_finish(MDRequestRef& mdr);
+ void request_forward(MDRequestRef& mdr, mds_rank_t mds, int port=0);
+ void dispatch_request(MDRequestRef& mdr);
+ void request_drop_foreign_locks(MDRequestRef& mdr);
+ void request_drop_non_rdlocks(MDRequestRef& r);
+ void request_drop_locks(MDRequestRef& r);
+ void request_cleanup(MDRequestRef& r);
+
+ void request_kill(MDRequestRef& r); // called when session closes
+
+ // journal/snap helpers
+ CInode *pick_inode_snap(CInode *in, snapid_t follows);
+ CInode *cow_inode(CInode *in, snapid_t last);
+ void journal_cow_dentry(MutationImpl *mut, EMetaBlob *metablob, CDentry *dn,
+ snapid_t follows=CEPH_NOSNAP,
+ CInode **pcow_inode=0, CDentry::linkage_t *dnl=0);
+ void journal_cow_inode(MutationRef& mut, EMetaBlob *metablob, CInode *in, snapid_t follows=CEPH_NOSNAP,
+ CInode **pcow_inode=0);
+ void journal_dirty_inode(MutationImpl *mut, EMetaBlob *metablob, CInode *in, snapid_t follows=CEPH_NOSNAP);
+
+ void project_rstat_inode_to_frag(CInode *cur, CDir *parent, snapid_t first,
+ int linkunlink, SnapRealm *prealm);
+ void _project_rstat_inode_to_frag(inode_t& inode, snapid_t ofirst, snapid_t last,
+ CDir *parent, int linkunlink, bool update_inode);
+ void project_rstat_frag_to_inode(nest_info_t& rstat, nest_info_t& accounted_rstat,
+ snapid_t ofirst, snapid_t last,
+ CInode *pin, bool cow_head);
+ void broadcast_quota_to_client(CInode *in);
+ void predirty_journal_parents(MutationRef mut, EMetaBlob *blob,
+ CInode *in, CDir *parent,
+ int flags, int linkunlink=0,
+ snapid_t follows=CEPH_NOSNAP);
+
+ // slaves
+ void add_uncommitted_master(metareqid_t reqid, LogSegment *ls, set<mds_rank_t> &slaves, bool safe=false) {
+ uncommitted_masters[reqid].ls = ls;
+ uncommitted_masters[reqid].slaves = slaves;
+ uncommitted_masters[reqid].safe = safe;
+ }
+ void wait_for_uncommitted_master(metareqid_t reqid, MDSInternalContextBase *c) {
+ uncommitted_masters[reqid].waiters.push_back(c);
+ }
+ bool have_uncommitted_master(metareqid_t reqid, mds_rank_t from) {
+ auto p = uncommitted_masters.find(reqid);
+ return p != uncommitted_masters.end() && p->second.slaves.count(from) > 0;
+ }
+ void log_master_commit(metareqid_t reqid);
+ void logged_master_update(metareqid_t reqid);
+ void _logged_master_commit(metareqid_t reqid);
+ void committed_master_slave(metareqid_t r, mds_rank_t from);
+ void finish_committed_masters();
+
+ void _logged_slave_commit(mds_rank_t from, metareqid_t reqid);
+
+ // -- recovery --
+protected:
+ set<mds_rank_t> recovery_set;
+
+public:
+ void set_recovery_set(set<mds_rank_t>& s);
+ void handle_mds_failure(mds_rank_t who);
+ void handle_mds_recovery(mds_rank_t who);
+
+protected:
+ // [resolve]
+ // from EImportStart w/o EImportFinish during journal replay
+ map<dirfrag_t, vector<dirfrag_t> > my_ambiguous_imports;
+ // from MMDSResolves
+ map<mds_rank_t, map<dirfrag_t, vector<dirfrag_t> > > other_ambiguous_imports;
+
+ map<mds_rank_t, map<metareqid_t, MDSlaveUpdate*> > uncommitted_slave_updates; // slave: for replay.
+ map<CInode*, int> uncommitted_slave_rename_olddir; // slave: preserve the non-auth dir until seeing commit.
+ map<CInode*, int> uncommitted_slave_unlink; // slave: preserve the unlinked inode until seeing commit.
+
+ // track master requests whose slaves haven't acknowledged commit
+ struct umaster {
+ set<mds_rank_t> slaves;
+ LogSegment *ls;
+ list<MDSInternalContextBase*> waiters;
+ bool safe;
+ bool committing;
+ bool recovering;
+ umaster() : ls(NULL), safe(false), committing(false), recovering(false) {}
+ };
+ map<metareqid_t, umaster> uncommitted_masters; // master: req -> slave set
+
+ set<metareqid_t> pending_masters;
+ map<int, set<metareqid_t> > ambiguous_slave_updates;
+
+ friend class ESlaveUpdate;
+ friend class ECommitted;
+
+ bool resolves_pending;
+ set<mds_rank_t> resolve_gather; // nodes i need resolves from
+ set<mds_rank_t> resolve_ack_gather; // nodes i need a resolve_ack from
+ map<metareqid_t, mds_rank_t> need_resolve_rollback; // rollbacks i'm writing to the journal
+ map<mds_rank_t, MMDSResolve*> delayed_resolve;
+
+ void handle_resolve(MMDSResolve *m);
+ void handle_resolve_ack(MMDSResolveAck *m);
+ void process_delayed_resolve();
+ void discard_delayed_resolve(mds_rank_t who);
+ void maybe_resolve_finish();
+ void disambiguate_my_imports();
+ void disambiguate_other_imports();
+ void trim_unlinked_inodes();
+ void add_uncommitted_slave_update(metareqid_t reqid, mds_rank_t master, MDSlaveUpdate*);
+ void finish_uncommitted_slave_update(metareqid_t reqid, mds_rank_t master);
+ MDSlaveUpdate* get_uncommitted_slave_update(metareqid_t reqid, mds_rank_t master);
+public:
+ void recalc_auth_bits(bool replay);
+ void remove_inode_recursive(CInode *in);
+
+ bool is_ambiguous_slave_update(metareqid_t reqid, mds_rank_t master) {
+ auto p = ambiguous_slave_updates.find(master);
+ return p != ambiguous_slave_updates.end() && p->second.count(reqid);
+ }
+ void add_ambiguous_slave_update(metareqid_t reqid, mds_rank_t master) {
+ ambiguous_slave_updates[master].insert(reqid);
+ }
+ void remove_ambiguous_slave_update(metareqid_t reqid, mds_rank_t master) {
+ auto p = ambiguous_slave_updates.find(master);
+ auto q = p->second.find(reqid);
+ assert(q != p->second.end());
+ p->second.erase(q);
+ if (p->second.empty())
+ ambiguous_slave_updates.erase(p);
+ }
+
+ void add_rollback(metareqid_t reqid, mds_rank_t master) {
+ need_resolve_rollback[reqid] = master;
+ }
+ void finish_rollback(metareqid_t reqid);
+
+ // ambiguous imports
+ void add_ambiguous_import(dirfrag_t base, const vector<dirfrag_t>& bounds);
+ void add_ambiguous_import(CDir *base, const set<CDir*>& bounds);
+ bool have_ambiguous_import(dirfrag_t base) {
+ return my_ambiguous_imports.count(base);
+ }
+ void get_ambiguous_import_bounds(dirfrag_t base, vector<dirfrag_t>& bounds) {
+ assert(my_ambiguous_imports.count(base));
+ bounds = my_ambiguous_imports[base];
+ }
+ void cancel_ambiguous_import(CDir *);
+ void finish_ambiguous_import(dirfrag_t dirino);
+ void resolve_start(MDSInternalContext *resolve_done_);
+ void send_resolves();
+ void send_slave_resolves();
+ void send_subtree_resolves();
+ void maybe_send_pending_resolves() {
+ if (resolves_pending)
+ send_subtree_resolves();
+ }
+
+ void _move_subtree_map_bound(dirfrag_t df, dirfrag_t oldparent, dirfrag_t newparent,
+ map<dirfrag_t,vector<dirfrag_t> >& subtrees);
+ ESubtreeMap *create_subtree_map();
+
+
+ void clean_open_file_lists();
+
+protected:
+ // [rejoin]
+ bool rejoins_pending;
+ set<mds_rank_t> rejoin_gather; // nodes from whom i need a rejoin
+ set<mds_rank_t> rejoin_sent; // nodes i sent a rejoin to
+ set<mds_rank_t> rejoin_ack_sent; // nodes i sent a rejoin to
+ set<mds_rank_t> rejoin_ack_gather; // nodes from whom i need a rejoin ack
+ map<mds_rank_t,map<inodeno_t,map<client_t,Capability::Import> > > rejoin_imported_caps;
+ map<inodeno_t,pair<mds_rank_t,map<client_t,Capability::Export> > > rejoin_slave_exports;
+ map<client_t,entity_inst_t> rejoin_client_map;
+
+ map<inodeno_t,map<client_t,cap_reconnect_t> > cap_exports; // ino -> client -> capex
+ map<inodeno_t,mds_rank_t> cap_export_targets; // ino -> auth mds
+
+ map<inodeno_t,map<client_t,map<mds_rank_t,cap_reconnect_t> > > cap_imports; // ino -> client -> frommds -> capex
+ set<inodeno_t> cap_imports_missing;
+ map<inodeno_t, list<MDSInternalContextBase*> > cap_reconnect_waiters;
+ int cap_imports_num_opening;
+
+ set<CInode*> rejoin_undef_inodes;
+ set<CInode*> rejoin_potential_updated_scatterlocks;
+ set<CDir*> rejoin_undef_dirfrags;
+ map<mds_rank_t, set<CInode*> > rejoin_unlinked_inodes;
+
+ vector<CInode*> rejoin_recover_q, rejoin_check_q;
+ list<SimpleLock*> rejoin_eval_locks;
+ list<MDSInternalContextBase*> rejoin_waiters;
+
+ void rejoin_walk(CDir *dir, MMDSCacheRejoin *rejoin);
+ void handle_cache_rejoin(MMDSCacheRejoin *m);
+ void handle_cache_rejoin_weak(MMDSCacheRejoin *m);
+ CInode* rejoin_invent_inode(inodeno_t ino, snapid_t last);
+ CDir* rejoin_invent_dirfrag(dirfrag_t df);
+ void handle_cache_rejoin_strong(MMDSCacheRejoin *m);
+ void rejoin_scour_survivor_replicas(mds_rank_t from, MMDSCacheRejoin *ack,
+ set<vinodeno_t>& acked_inodes,
+ set<SimpleLock *>& gather_locks);
+ void handle_cache_rejoin_ack(MMDSCacheRejoin *m);
+ void rejoin_send_acks();
+ void rejoin_trim_undef_inodes();
+ void maybe_send_pending_rejoins() {
+ if (rejoins_pending)
+ rejoin_send_rejoins();
+ }
+ std::unique_ptr<MDSInternalContext> rejoin_done;
+ std::unique_ptr<MDSInternalContext> resolve_done;
+public:
+ void rejoin_start(MDSInternalContext *rejoin_done_);
+ void rejoin_gather_finish();
+ void rejoin_send_rejoins();
+ void rejoin_export_caps(inodeno_t ino, client_t client, const cap_reconnect_t& icr,
+ int target=-1) {
+ cap_exports[ino][client] = icr;
+ cap_export_targets[ino] = target;
+ }
+ void rejoin_recovered_caps(inodeno_t ino, client_t client, const cap_reconnect_t& icr,
+ mds_rank_t frommds=MDS_RANK_NONE) {
+ cap_imports[ino][client][frommds] = icr;
+ }
+ const cap_reconnect_t *get_replay_cap_reconnect(inodeno_t ino, client_t client) {
+ if (cap_imports.count(ino) &&
+ cap_imports[ino].count(client) &&
+ cap_imports[ino][client].count(MDS_RANK_NONE)) {
+ return &cap_imports[ino][client][MDS_RANK_NONE];
+ }
+ return NULL;
+ }
+ void remove_replay_cap_reconnect(inodeno_t ino, client_t client) {
+ assert(cap_imports[ino].size() == 1);
+ assert(cap_imports[ino][client].size() == 1);
+ cap_imports.erase(ino);
+ }
+ void wait_replay_cap_reconnect(inodeno_t ino, MDSInternalContextBase *c) {
+ cap_reconnect_waiters[ino].push_back(c);
+ }
+
+ // [reconnect/rejoin caps]
+ struct reconnected_cap_info_t {
+ inodeno_t realm_ino;
+ snapid_t snap_follows;
+ int dirty_caps;
+ reconnected_cap_info_t() :
+ realm_ino(0), snap_follows(0), dirty_caps(0) {}
+ };
+ map<inodeno_t,map<client_t, reconnected_cap_info_t> > reconnected_caps; // inode -> client -> snap_follows,realmino
+ map<inodeno_t,map<client_t, snapid_t> > reconnected_snaprealms; // realmino -> client -> realmseq
+
+ void add_reconnected_cap(client_t client, inodeno_t ino, const cap_reconnect_t& icr) {
+ reconnected_cap_info_t &info = reconnected_caps[ino][client];
+ info.realm_ino = inodeno_t(icr.capinfo.snaprealm);
+ info.snap_follows = icr.snap_follows;
+ }
+ void set_reconnected_dirty_caps(client_t client, inodeno_t ino, int dirty) {
+ reconnected_cap_info_t &info = reconnected_caps[ino][client];
+ info.dirty_caps |= dirty;
+ }
+ void add_reconnected_snaprealm(client_t client, inodeno_t ino, snapid_t seq) {
+ reconnected_snaprealms[ino][client] = seq;
+ }
+
+ friend class C_MDC_RejoinOpenInoFinish;
+ friend class C_MDC_RejoinSessionsOpened;
+ void rejoin_open_ino_finish(inodeno_t ino, int ret);
+ void rejoin_open_sessions_finish(map<client_t,entity_inst_t> client_map,
+ map<client_t,uint64_t>& sseqmap);
+ bool process_imported_caps();
+ void choose_lock_states_and_reconnect_caps();
+ void prepare_realm_split(SnapRealm *realm, client_t client, inodeno_t ino,
+ map<client_t,MClientSnap*>& splits);
+ void do_realm_invalidate_and_update_notify(CInode *in, int snapop, bool nosend=false);
+ void send_snaps(map<client_t,MClientSnap*>& splits);
+ Capability* rejoin_import_cap(CInode *in, client_t client, const cap_reconnect_t& icr, mds_rank_t frommds);
+ void finish_snaprealm_reconnect(client_t client, SnapRealm *realm, snapid_t seq);
+ void try_reconnect_cap(CInode *in, Session *session);
+ void export_remaining_imported_caps();
+
+ // cap imports. delayed snap parent opens.
+ // realm inode -> client -> cap inodes needing to split to this realm
+ map<CInode*,set<CInode*> > missing_snap_parents;
+ map<client_t,set<CInode*> > delayed_imported_caps;
+
+ void do_cap_import(Session *session, CInode *in, Capability *cap,
+ uint64_t p_cap_id, ceph_seq_t p_seq, ceph_seq_t p_mseq,
+ int peer, int p_flags);
+ void do_delayed_cap_imports();
+ void rebuild_need_snapflush(CInode *head_in, SnapRealm *realm, client_t client,
+ snapid_t snap_follows);
+ void check_realm_past_parents(SnapRealm *realm, bool reconnect);
+ void open_snap_parents();
+
+ bool open_undef_inodes_dirfrags();
+ void opened_undef_inode(CInode *in);
+ void opened_undef_dirfrag(CDir *dir) {
+ rejoin_undef_dirfrags.erase(dir);
+ }
+
+ void reissue_all_caps();
+
+
+ friend class Locker;
+ friend class Migrator;
+ friend class MDBalancer;
+
+ // StrayManager needs to be able to remove_inode() from us
+ // when it is done purging
+ friend class StrayManager;
+
+ // File size recovery
+private:
+ RecoveryQueue recovery_queue;
+ void identify_files_to_recover();
+public:
+ void start_files_to_recover();
+ void do_file_recover();
+ void queue_file_recover(CInode *in);
+ void _queued_file_recover_cow(CInode *in, MutationRef& mut);
+
+ // subsystems
+ std::unique_ptr<Migrator> migrator;
+
+ public:
+ explicit MDCache(MDSRank *m, PurgeQueue &purge_queue_);
+ ~MDCache();
+
+ // debug
+ void log_stat();
+
+ // root inode
+ CInode *get_root() { return root; }
+ CInode *get_myin() { return myin; }
+
+ size_t get_cache_size() { return lru.lru_get_size(); }
+
+ // trimming
+ bool trim(uint64_t count=0);
+private:
+ void trim_lru(uint64_t count, map<mds_rank_t, MCacheExpire*>& expiremap);
+ bool trim_dentry(CDentry *dn, map<mds_rank_t, MCacheExpire*>& expiremap);
+ void trim_dirfrag(CDir *dir, CDir *con,
+ map<mds_rank_t, MCacheExpire*>& expiremap);
+ bool trim_inode(CDentry *dn, CInode *in, CDir *con,
+ map<mds_rank_t,class MCacheExpire*>& expiremap);
+ void send_expire_messages(map<mds_rank_t, MCacheExpire*>& expiremap);
+ void trim_non_auth(); // trim out trimmable non-auth items
+public:
+ bool trim_non_auth_subtree(CDir *directory);
+ void standby_trim_segment(LogSegment *ls);
+ void try_trim_non_auth_subtree(CDir *dir);
+ bool can_trim_non_auth_dirfrag(CDir *dir) {
+ return my_ambiguous_imports.count((dir)->dirfrag()) == 0 &&
+ uncommitted_slave_rename_olddir.count(dir->inode) == 0;
+ }
+
+ /**
+ * For all unreferenced inodes, dirs, dentries below an inode, compose
+ * expiry messages. This is used when giving up all replicas of entities
+ * for an MDS peer in the 'stopping' state, such that the peer can
+ * empty its cache and finish shutting down.
+ *
+ * We have to make sure we're only expiring un-referenced items to
+ * avoid interfering with ongoing stray-movement (we can't distinguish
+ * between the "moving my strays" and "waiting for my cache to empty"
+ * phases within 'stopping')
+ *
+ * @return false if we completed cleanly, true if caller should stop
+ * expiring because we hit something with refs.
+ */
+ bool expire_recursive(
+ CInode *in,
+ std::map<mds_rank_t, MCacheExpire*>& expiremap);
+
+ void trim_client_leases();
+ void check_memory_usage();
+
+ utime_t last_recall_state;
+
+ // shutdown
+private:
+ set<inodeno_t> shutdown_exported_strays;
+public:
+ void shutdown_start();
+ void shutdown_check();
+ bool shutdown_pass();
+ bool shutdown_export_strays();
+ bool shutdown(); // clear cache (ie at shutodwn)
+
+ bool did_shutdown_log_cap;
+
+ // inode_map
+ bool have_inode(vinodeno_t vino) {
+ return inode_map.count(vino) ? true:false;
+ }
+ bool have_inode(inodeno_t ino, snapid_t snap=CEPH_NOSNAP) {
+ return have_inode(vinodeno_t(ino, snap));
+ }
+ CInode* get_inode(vinodeno_t vino) {
+ if (have_inode(vino))
+ return inode_map[vino];
+ return NULL;
+ }
+ CInode* get_inode(inodeno_t ino, snapid_t s=CEPH_NOSNAP) {
+ return get_inode(vinodeno_t(ino, s));
+ }
+
+ CDir* get_dirfrag(dirfrag_t df) {
+ CInode *in = get_inode(df.ino);
+ if (!in)
+ return NULL;
+ return in->get_dirfrag(df.frag);
+ }
+ CDir* get_dirfrag(inodeno_t ino, const string& dn) {
+ CInode *in = get_inode(ino);
+ if (!in)
+ return NULL;
+ frag_t fg = in->pick_dirfrag(dn);
+ return in->get_dirfrag(fg);
+ }
+ CDir* get_force_dirfrag(dirfrag_t df, bool replay) {
+ CInode *diri = get_inode(df.ino);
+ if (!diri)
+ return NULL;
+ CDir *dir = force_dir_fragment(diri, df.frag, replay);
+ if (!dir)
+ dir = diri->get_dirfrag(df.frag);
+ return dir;
+ }
+
+ MDSCacheObject *get_object(MDSCacheObjectInfo &info);
+
+
+
+ public:
+ void add_inode(CInode *in);
+
+ void remove_inode(CInode *in);
+ protected:
+ void touch_inode(CInode *in) {
+ if (in->get_parent_dn())
+ touch_dentry(in->get_projected_parent_dn());
+ }
+public:
+ void touch_dentry(CDentry *dn) {
+ if (dn->state_test(CDentry::STATE_BOTTOMLRU)) {
+ bottom_lru.lru_midtouch(dn);
+ } else {
+ if (dn->is_auth())
+ lru.lru_touch(dn);
+ else
+ lru.lru_midtouch(dn);
+ }
+ }
+ void touch_dentry_bottom(CDentry *dn) {
+ if (dn->state_test(CDentry::STATE_BOTTOMLRU))
+ return;
+ lru.lru_bottouch(dn);
+ }
+protected:
+
+ void inode_remove_replica(CInode *in, mds_rank_t rep, bool rejoin,
+ set<SimpleLock *>& gather_locks);
+ void dentry_remove_replica(CDentry *dn, mds_rank_t rep, set<SimpleLock *>& gather_locks);
+
+ void rename_file(CDentry *srcdn, CDentry *destdn);
+
+ public:
+ // truncate
+ void truncate_inode(CInode *in, LogSegment *ls);
+ void _truncate_inode(CInode *in, LogSegment *ls);
+ void truncate_inode_finish(CInode *in, LogSegment *ls);
+ void truncate_inode_logged(CInode *in, MutationRef& mut);
+
+ void add_recovered_truncate(CInode *in, LogSegment *ls);
+ void remove_recovered_truncate(CInode *in, LogSegment *ls);
+ void start_recovered_truncates();
+
+
+ public:
+ CDir *get_auth_container(CDir *in);
+ CDir *get_export_container(CDir *dir);
+ void find_nested_exports(CDir *dir, set<CDir*>& s);
+ void find_nested_exports_under(CDir *import, CDir *dir, set<CDir*>& s);
+
+
+private:
+ bool opening_root, open;
+ list<MDSInternalContextBase*> waiting_for_open;
+
+public:
+ void init_layouts();
+ void create_unlinked_system_inode(CInode *in, inodeno_t ino,
+ int mode) const;
+ CInode *create_system_inode(inodeno_t ino, int mode);
+ CInode *create_root_inode();
+
+ void create_empty_hierarchy(MDSGather *gather);
+ void create_mydir_hierarchy(MDSGather *gather);
+
+ bool is_open() { return open; }
+ void wait_for_open(MDSInternalContextBase *c) {
+ waiting_for_open.push_back(c);
+ }
+
+ void open_root_inode(MDSInternalContextBase *c);
+ void open_root();
+ void open_mydir_inode(MDSInternalContextBase *c);
+ void populate_mydir();
+
+ void _create_system_file(CDir *dir, const char *name, CInode *in, MDSInternalContextBase *fin);
+ void _create_system_file_finish(MutationRef& mut, CDentry *dn,
+ version_t dpv, MDSInternalContextBase *fin);
+
+ void open_foreign_mdsdir(inodeno_t ino, MDSInternalContextBase *c);
+ CDir *get_stray_dir(CInode *in);
+ CDentry *get_or_create_stray_dentry(CInode *in);
+
+ MDSInternalContextBase *_get_waiter(MDRequestRef& mdr, Message *req, MDSInternalContextBase *fin);
+
+ /**
+ * Find the given dentry (and whether it exists or not), its ancestors,
+ * and get them all into memory and usable on this MDS. This function
+ * makes a best-effort attempt to load everything; if it needs to
+ * go away and do something then it will put the request on a waitlist.
+ * It prefers the mdr, then the req, then the fin. (At least one of these
+ * must be non-null.)
+ *
+ * At least one of the params mdr, req, and fin must be non-null.
+ *
+ * @param mdr The MDRequest associated with the path. Can be null.
+ * @param req The Message associated with the path. Can be null.
+ * @param fin The Context associated with the path. Can be null.
+ * @param path The path to traverse to.
+ * @param pdnvec Data return parameter -- on success, contains a
+ * vector of dentries. On failure, is either empty or contains the
+ * full trace of traversable dentries.
+ * @param pin Data return parameter -- if successful, points to the inode
+ * associated with filepath. If unsuccessful, is null.
+ * @param onfail Specifies different lookup failure behaviors. If set to
+ * MDS_TRAVERSE_DISCOVERXLOCK, path_traverse will succeed on null
+ * dentries (instead of returning -ENOENT). If set to
+ * MDS_TRAVERSE_FORWARD, it will forward the request to the auth
+ * MDS if that becomes appropriate (ie, if it doesn't know the contents
+ * of a directory). If set to MDS_TRAVERSE_DISCOVER, it
+ * will attempt to look up the path from a different MDS (and bring them
+ * into its cache as replicas).
+ *
+ * @returns 0 on success, 1 on "not done yet", 2 on "forwarding", -errno otherwise.
+ * If it returns 1, the requester associated with this call has been placed
+ * on the appropriate waitlist, and it should unwind itself and back out.
+ * If it returns 2 the request has been forwarded, and again the requester
+ * should unwind itself and back out.
+ */
+ int path_traverse(MDRequestRef& mdr, Message *req, MDSInternalContextBase *fin, const filepath& path,
+ vector<CDentry*> *pdnvec, CInode **pin, int onfail);
+
+ CInode *cache_traverse(const filepath& path);
+
+ void open_remote_dirfrag(CInode *diri, frag_t fg, MDSInternalContextBase *fin);
+ CInode *get_dentry_inode(CDentry *dn, MDRequestRef& mdr, bool projected=false);
+
+ bool parallel_fetch(map<inodeno_t,filepath>& pathmap, set<inodeno_t>& missing);
+ bool parallel_fetch_traverse_dir(inodeno_t ino, filepath& path,
+ set<CDir*>& fetch_queue, set<inodeno_t>& missing,
+ C_GatherBuilder &gather_bld);
+
+ void open_remote_dentry(CDentry *dn, bool projected, MDSInternalContextBase *fin,
+ bool want_xlocked=false);
+ void _open_remote_dentry_finish(CDentry *dn, inodeno_t ino, MDSInternalContextBase *fin,
+ bool want_xlocked, int r);
+
+ void make_trace(vector<CDentry*>& trace, CInode *in);
+
+protected:
+ struct open_ino_info_t {
+ vector<inode_backpointer_t> ancestors;
+ set<mds_rank_t> checked;
+ mds_rank_t checking;
+ mds_rank_t auth_hint;
+ bool check_peers;
+ bool fetch_backtrace;
+ bool discover;
+ bool want_replica;
+ bool want_xlocked;
+ version_t tid;
+ int64_t pool;
+ int last_err;
+ list<MDSInternalContextBase*> waiters;
+ open_ino_info_t() : checking(MDS_RANK_NONE), auth_hint(MDS_RANK_NONE),
+ check_peers(true), fetch_backtrace(true), discover(false),
+ want_replica(false), want_xlocked(false), tid(0), pool(-1),
+ last_err(0) {}
+ };
+ ceph_tid_t open_ino_last_tid;
+ map<inodeno_t,open_ino_info_t> opening_inodes;
+
+ void _open_ino_backtrace_fetched(inodeno_t ino, bufferlist& bl, int err);
+ void _open_ino_parent_opened(inodeno_t ino, int ret);
+ void _open_ino_traverse_dir(inodeno_t ino, open_ino_info_t& info, int err);
+ void _open_ino_fetch_dir(inodeno_t ino, MMDSOpenIno *m, CDir *dir, bool parent);
+ int open_ino_traverse_dir(inodeno_t ino, MMDSOpenIno *m,
+ vector<inode_backpointer_t>& ancestors,
+ bool discover, bool want_xlocked, mds_rank_t *hint);
+ void open_ino_finish(inodeno_t ino, open_ino_info_t& info, int err);
+ void do_open_ino(inodeno_t ino, open_ino_info_t& info, int err);
+ void do_open_ino_peer(inodeno_t ino, open_ino_info_t& info);
+ void handle_open_ino(MMDSOpenIno *m, int err=0);
+ void handle_open_ino_reply(MMDSOpenInoReply *m);
+ friend class C_IO_MDC_OpenInoBacktraceFetched;
+ friend struct C_MDC_OpenInoTraverseDir;
+ friend struct C_MDC_OpenInoParentOpened;
+
+public:
+ void kick_open_ino_peers(mds_rank_t who);
+ void open_ino(inodeno_t ino, int64_t pool, MDSInternalContextBase *fin,
+ bool want_replica=true, bool want_xlocked=false);
+
+ // -- find_ino_peer --
+ struct find_ino_peer_info_t {
+ inodeno_t ino;
+ ceph_tid_t tid;
+ MDSInternalContextBase *fin;
+ mds_rank_t hint;
+ mds_rank_t checking;
+ set<mds_rank_t> checked;
+
+ find_ino_peer_info_t() : tid(0), fin(NULL), hint(MDS_RANK_NONE), checking(MDS_RANK_NONE) {}
+ };
+
+ map<ceph_tid_t, find_ino_peer_info_t> find_ino_peer;
+ ceph_tid_t find_ino_peer_last_tid;
+
+ void find_ino_peers(inodeno_t ino, MDSInternalContextBase *c, mds_rank_t hint=MDS_RANK_NONE);
+ void _do_find_ino_peer(find_ino_peer_info_t& fip);
+ void handle_find_ino(MMDSFindIno *m);
+ void handle_find_ino_reply(MMDSFindInoReply *m);
+ void kick_find_ino_peers(mds_rank_t who);
+
+ // -- snaprealms --
+public:
+ void snaprealm_create(MDRequestRef& mdr, CInode *in);
+ void _snaprealm_create_finish(MDRequestRef& mdr, MutationRef& mut, CInode *in);
+
+ // -- stray --
+public:
+ void fetch_backtrace(inodeno_t ino, int64_t pool, bufferlist& bl, Context *fin);
+ uint64_t get_num_strays() const { return stray_manager.get_num_strays(); }
+
+protected:
+ void scan_stray_dir(dirfrag_t next=dirfrag_t());
+ StrayManager stray_manager;
+ friend struct C_MDC_RetryScanStray;
+ friend class C_IO_MDC_FetchedBacktrace;
+
+ // == messages ==
+ public:
+ void dispatch(Message *m);
+
+ protected:
+ // -- replicas --
+ void handle_discover(MDiscover *dis);
+ void handle_discover_reply(MDiscoverReply *m);
+ friend class C_MDC_Join;
+
+public:
+ void replicate_dir(CDir *dir, mds_rank_t to, bufferlist& bl) {
+ dirfrag_t df = dir->dirfrag();
+ ::encode(df, bl);
+ dir->encode_replica(to, bl);
+ }
+ void replicate_dentry(CDentry *dn, mds_rank_t to, bufferlist& bl) {
+ ::encode(dn->name, bl);
+ ::encode(dn->last, bl);
+ dn->encode_replica(to, bl);
+ }
+ void replicate_inode(CInode *in, mds_rank_t to, bufferlist& bl,
+ uint64_t features) {
+ ::encode(in->inode.ino, bl); // bleh, minor assymetry here
+ ::encode(in->last, bl);
+ in->encode_replica(to, bl, features);
+ }
+
+ CDir* add_replica_dir(bufferlist::iterator& p, CInode *diri, mds_rank_t from, list<MDSInternalContextBase*>& finished);
+ CDentry *add_replica_dentry(bufferlist::iterator& p, CDir *dir, list<MDSInternalContextBase*>& finished);
+ CInode *add_replica_inode(bufferlist::iterator& p, CDentry *dn, list<MDSInternalContextBase*>& finished);
+
+ void replicate_stray(CDentry *straydn, mds_rank_t who, bufferlist& bl);
+ CDentry *add_replica_stray(bufferlist &bl, mds_rank_t from);
+
+ // -- namespace --
+public:
+ void send_dentry_link(CDentry *dn, MDRequestRef& mdr);
+ void send_dentry_unlink(CDentry *dn, CDentry *straydn, MDRequestRef& mdr);
+protected:
+ void handle_dentry_link(MDentryLink *m);
+ void handle_dentry_unlink(MDentryUnlink *m);
+
+
+ // -- fragmenting --
+private:
+ struct ufragment {
+ int bits;
+ bool committed;
+ LogSegment *ls;
+ list<MDSInternalContextBase*> waiters;
+ list<frag_t> old_frags;
+ bufferlist rollback;
+ ufragment() : bits(0), committed(false), ls(NULL) {}
+ };
+ map<dirfrag_t, ufragment> uncommitted_fragments;
+
+ struct fragment_info_t {
+ int bits;
+ list<CDir*> dirs;
+ list<CDir*> resultfrags;
+ MDRequestRef mdr;
+ // for deadlock detection
+ bool all_frozen;
+ utime_t last_cum_auth_pins_change;
+ int last_cum_auth_pins;
+ int num_remote_waiters; // number of remote authpin waiters
+ fragment_info_t() : bits(0), all_frozen(false), last_cum_auth_pins(0), num_remote_waiters(0) {}
+ bool is_fragmenting() { return !resultfrags.empty(); }
+ };
+ map<dirfrag_t,fragment_info_t> fragments;
+
+ void adjust_dir_fragments(CInode *diri, frag_t basefrag, int bits,
+ list<CDir*>& frags, list<MDSInternalContextBase*>& waiters, bool replay);
+ void adjust_dir_fragments(CInode *diri,
+ list<CDir*>& srcfrags,
+ frag_t basefrag, int bits,
+ list<CDir*>& resultfrags,
+ list<MDSInternalContextBase*>& waiters,
+ bool replay);
+ CDir *force_dir_fragment(CInode *diri, frag_t fg, bool replay=true);
+ void get_force_dirfrag_bound_set(vector<dirfrag_t>& dfs, set<CDir*>& bounds);
+
+ bool can_fragment(CInode *diri, list<CDir*>& dirs);
+ void fragment_freeze_dirs(list<CDir*>& dirs);
+ void fragment_mark_and_complete(MDRequestRef& mdr);
+ void fragment_frozen(MDRequestRef& mdr, int r);
+ void fragment_unmark_unfreeze_dirs(list<CDir*>& dirs);
+ void dispatch_fragment_dir(MDRequestRef& mdr);
+ void _fragment_logged(MDRequestRef& mdr);
+ void _fragment_stored(MDRequestRef& mdr);
+ void _fragment_committed(dirfrag_t f, list<CDir*>& resultfrags);
+ void _fragment_finish(dirfrag_t f, list<CDir*>& resultfrags);
+
+ friend class EFragment;
+ friend class C_MDC_FragmentFrozen;
+ friend class C_MDC_FragmentMarking;
+ friend class C_MDC_FragmentPrep;
+ friend class C_MDC_FragmentStore;
+ friend class C_MDC_FragmentCommit;
+ friend class C_IO_MDC_FragmentFinish;
+
+ void handle_fragment_notify(MMDSFragmentNotify *m);
+
+ void add_uncommitted_fragment(dirfrag_t basedirfrag, int bits, list<frag_t>& old_frag,
+ LogSegment *ls, bufferlist *rollback=NULL);
+ void finish_uncommitted_fragment(dirfrag_t basedirfrag, int op);
+ void rollback_uncommitted_fragment(dirfrag_t basedirfrag, list<frag_t>& old_frags);
+public:
+ void wait_for_uncommitted_fragment(dirfrag_t dirfrag, MDSInternalContextBase *c) {
+ assert(uncommitted_fragments.count(dirfrag));
+ uncommitted_fragments[dirfrag].waiters.push_back(c);
+ }
+ void split_dir(CDir *dir, int byn);
+ void merge_dir(CInode *diri, frag_t fg);
+ void rollback_uncommitted_fragments();
+
+ void find_stale_fragment_freeze();
+ void fragment_freeze_inc_num_waiters(CDir *dir);
+ bool fragment_are_all_frozen(CDir *dir);
+ int get_num_fragmenting_dirs() { return fragments.size(); }
+
+ // -- updates --
+ //int send_inode_updates(CInode *in);
+ //void handle_inode_update(MInodeUpdate *m);
+
+ int send_dir_updates(CDir *in, bool bcast=false);
+ void handle_dir_update(MDirUpdate *m);
+
+ // -- cache expiration --
+ void handle_cache_expire(MCacheExpire *m);
+ void process_delayed_expire(CDir *dir);
+ void discard_delayed_expire(CDir *dir);
+
+protected:
+ int dump_cache(const char *fn, Formatter *f,
+ const std::string& dump_root = "",
+ int depth = -1);
+public:
+ int dump_cache() { return dump_cache(NULL, NULL); }
+ int dump_cache(const std::string &filename);
+ int dump_cache(Formatter *f);
+ int dump_cache(const std::string& dump_root, int depth, Formatter *f);
+
+ int cache_status(Formatter *f);
+
+ void dump_resolve_status(Formatter *f) const;
+ void dump_rejoin_status(Formatter *f) const;
+
+ // == crap fns ==
+ public:
+ void show_cache();
+ void show_subtrees(int dbl=10);
+
+ CInode *hack_pick_random_inode() {
+ assert(!inode_map.empty());
+ int n = rand() % inode_map.size();
+ ceph::unordered_map<vinodeno_t,CInode*>::iterator p = inode_map.begin();
+ while (n--) ++p;
+ return p->second;
+ }
+
+protected:
+ void flush_dentry_work(MDRequestRef& mdr);
+ /**
+ * Resolve path to a dentry and pass it onto the ScrubStack.
+ *
+ * TODO: return enough information to the original mdr formatter
+ * and completion that they can subsequeuntly check the progress of
+ * this scrub (we won't block them on a whole scrub as it can take a very
+ * long time)
+ */
+ void enqueue_scrub_work(MDRequestRef& mdr);
+ void repair_inode_stats_work(MDRequestRef& mdr);
+ void repair_dirfrag_stats_work(MDRequestRef& mdr);
+ friend class C_MDC_RepairDirfragStats;
+public:
+ void flush_dentry(const string& path, Context *fin);
+ /**
+ * Create and start an OP_ENQUEUE_SCRUB
+ */
+ void enqueue_scrub(const string& path, const std::string &tag,
+ bool force, bool recursive, bool repair,
+ Formatter *f, Context *fin);
+ void repair_inode_stats(CInode *diri);
+ void repair_dirfrag_stats(CDir *dir);
+
+public:
+ /* Because exports may fail, this set lets us keep track of inodes that need exporting. */
+ std::set<CInode *> export_pin_queue;
+};
+
+class C_MDS_RetryRequest : public MDSInternalContext {
+ MDCache *cache;
+ MDRequestRef mdr;
+ public:
+ C_MDS_RetryRequest(MDCache *c, MDRequestRef& r);
+ void finish(int r) override;
+};
+
+#endif
Code Review / stor4nfv.git / blobdiff