1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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.
17 #ifndef CEPH_MDCACHE_H
18 #define CEPH_MDCACHE_H
20 #include "include/types.h"
21 #include "include/filepath.h"
22 #include "include/elist.h"
24 #include "osdc/Filer.h"
28 #include "include/Context.h"
29 #include "events/EMetaBlob.h"
30 #include "RecoveryQueue.h"
31 #include "StrayManager.h"
32 #include "MDSContext.h"
36 #include "messages/MClientRequest.h"
37 #include "messages/MMDSSlaveRequest.h"
50 class MMDSCacheRejoin
;
59 struct MMDSFindInoReply
;
61 struct MMDSOpenInoReply
;
65 class MMDSSlaveRequest
;
68 class MMDSFragmentNotify
;
74 // How many inodes currently in stray dentries
76 // How many stray dentries are currently delayed for purge due to refs
77 l_mdc_num_strays_delayed
,
78 // How many stray dentries are currently being enqueued for purge
79 l_mdc_num_strays_enqueuing
,
81 // How many dentries have ever been added to stray dir
83 // How many dentries have been passed on to PurgeQueue
84 l_mdc_strays_enqueued
,
85 // How many strays have been reintegrated?
86 l_mdc_strays_reintegrated
,
87 // How many strays have been migrated?
88 l_mdc_strays_migrated
,
90 // How many inode sizes currently being recovered
91 l_mdc_num_recovering_processing
,
92 // How many inodes currently waiting to have size recovered
93 l_mdc_num_recovering_enqueued
,
94 // How many inodes waiting with elevated priority for recovery
95 l_mdc_num_recovering_prioritized
,
96 // How many inodes ever started size recovery
97 l_mdc_recovery_started
,
98 // How many inodes ever completed size recovery
99 l_mdc_recovery_completed
,
101 l_mdss_ireq_enqueue_scrub
,
102 l_mdss_ireq_exportdir
,
104 l_mdss_ireq_fragmentdir
,
105 l_mdss_ireq_fragstats
,
106 l_mdss_ireq_inodestats
,
112 // flags for predirty_journal_parents()
113 static const int PREDIRTY_PRIMARY
= 1; // primary dn, adjust nested accounting
114 static const int PREDIRTY_DIR
= 2; // update parent dir mtime/size
115 static const int PREDIRTY_SHALLOW
= 4; // only go to immediate parent (for easier rollback)
123 LRU lru
; // dentry lru for expiring items from cache
124 LRU bottom_lru
; // dentries that should be trimmed ASAP
126 ceph::unordered_map
<inodeno_t
,CInode
*> inode_map
; // map of head inodes by ino
127 map
<vinodeno_t
, CInode
*> snap_inode_map
; // map of snap inodes by ino
128 CInode
*root
; // root inode
129 CInode
*myin
; // .ceph/mds%d dir
132 void set_readonly() { readonly
= true; }
134 CInode
*strays
[NUM_STRAY
]; // my stray dir
137 CInode
*get_stray() {
138 return strays
[stray_index
];
141 set
<CInode
*> base_inodes
;
143 std::unique_ptr
<PerfCounters
> logger
;
147 bool exceeded_size_limit
;
150 static uint64_t cache_limit_inodes(void) {
151 return g_conf
->get_val
<int64_t>("mds_cache_size");
153 static uint64_t cache_limit_memory(void) {
154 return g_conf
->get_val
<uint64_t>("mds_cache_memory_limit");
156 static double cache_reservation(void) {
157 return g_conf
->get_val
<double>("mds_cache_reservation");
159 static double cache_mid(void) {
160 return g_conf
->get_val
<double>("mds_cache_mid");
162 static double cache_health_threshold(void) {
163 return g_conf
->get_val
<double>("mds_health_cache_threshold");
165 double cache_toofull_ratio(void) const {
166 uint64_t inode_limit
= cache_limit_inodes();
167 double inode_reserve
= inode_limit
*(1.0-cache_reservation());
168 double memory_reserve
= cache_limit_memory()*(1.0-cache_reservation());
169 return fmax(0.0, fmax((cache_size()-memory_reserve
)/memory_reserve
, inode_limit
== 0 ? 0.0 : (CInode::count()-inode_reserve
)/inode_reserve
));
171 bool cache_toofull(void) const {
172 return cache_toofull_ratio() > 0.0;
174 uint64_t cache_size(void) const {
175 return mempool::get_pool(mempool::mds_co::id
).allocated_bytes();
177 bool cache_overfull(void) const {
178 uint64_t inode_limit
= cache_limit_inodes();
179 return (inode_limit
> 0 && CInode::count() > inode_limit
*cache_health_threshold()) || (cache_size() > cache_limit_memory()*cache_health_threshold());
182 void advance_stray() {
183 stray_index
= (stray_index
+1)%NUM_STRAY
;
186 void activate_stray_manager();
189 * Call this when you know that a CDentry is ready to be passed
190 * on to StrayManager (i.e. this is a stray you've just created)
192 void notify_stray(CDentry
*dn
) {
193 assert(dn
->get_dir()->get_inode()->is_stray());
194 stray_manager
.eval_stray(dn
);
197 void maybe_eval_stray(CInode
*in
, bool delay
=false);
198 void clear_dirty_bits_for_stray(CInode
* diri
);
200 bool is_readonly() { return readonly
; }
201 void force_readonly();
205 int num_shadow_inodes
;
207 int num_inodes_with_caps
;
209 unsigned max_dir_commit_size
;
211 static file_layout_t
gen_default_file_layout(const MDSMap
&mdsmap
);
212 static file_layout_t
gen_default_log_layout(const MDSMap
&mdsmap
);
214 file_layout_t default_file_layout
;
215 file_layout_t default_log_layout
;
217 void register_perfcounters();
219 // -- client leases --
221 static const int client_lease_pools
= 3;
222 float client_lease_durations
[client_lease_pools
];
224 xlist
<ClientLease
*> client_leases
[client_lease_pools
];
226 void touch_client_lease(ClientLease
*r
, int pool
, utime_t ttl
) {
227 client_leases
[pool
].push_back(&r
->item_lease
);
231 void notify_stray_removed()
233 stray_manager
.notify_stray_removed();
236 void notify_stray_created()
238 stray_manager
.notify_stray_created();
241 void eval_remote(CDentry
*dn
)
243 stray_manager
.eval_remote(dn
);
247 uint64_t last_cap_id
;
252 struct discover_info_t
{
264 tid(0), mds(-1), snap(CEPH_NOSNAP
), basei(NULL
),
265 want_base_dir(false), want_xlocked(false) {}
268 basei
->put(MDSCacheObject::PIN_DISCOVERBASE
);
270 void pin_base(CInode
*b
) {
272 basei
->get(MDSCacheObject::PIN_DISCOVERBASE
);
276 map
<ceph_tid_t
, discover_info_t
> discovers
;
277 ceph_tid_t discover_last_tid
;
279 void _send_discover(discover_info_t
& dis
);
280 discover_info_t
& _create_discover(mds_rank_t mds
) {
281 ceph_tid_t t
= ++discover_last_tid
;
282 discover_info_t
& d
= discovers
[t
];
289 map
<int, map
<inodeno_t
, list
<MDSInternalContextBase
*> > > waiting_for_base_ino
;
291 void discover_base_ino(inodeno_t want_ino
, MDSInternalContextBase
*onfinish
, mds_rank_t from
=MDS_RANK_NONE
);
292 void discover_dir_frag(CInode
*base
, frag_t approx_fg
, MDSInternalContextBase
*onfinish
,
293 mds_rank_t from
=MDS_RANK_NONE
);
294 void discover_path(CInode
*base
, snapid_t snap
, filepath want_path
, MDSInternalContextBase
*onfinish
,
295 bool want_xlocked
=false, mds_rank_t from
=MDS_RANK_NONE
);
296 void discover_path(CDir
*base
, snapid_t snap
, filepath want_path
, MDSInternalContextBase
*onfinish
,
297 bool want_xlocked
=false);
298 void kick_discovers(mds_rank_t who
); // after a failure.
303 /* subtree keys and each tree's non-recursive nested subtrees (the "bounds") */
304 map
<CDir
*,set
<CDir
*> > subtrees
;
305 map
<CInode
*,list
<pair
<CDir
*,CDir
*> > > projected_subtree_renames
; // renamed ino -> target dir
307 // adjust subtree auth specification
309 // imports/exports/nested_exports
310 // join/split subtrees as appropriate
312 bool is_subtrees() { return !subtrees
.empty(); }
313 void list_subtrees(list
<CDir
*>& ls
);
314 void adjust_subtree_auth(CDir
*root
, mds_authority_t auth
);
315 void adjust_subtree_auth(CDir
*root
, mds_rank_t a
, mds_rank_t b
=CDIR_AUTH_UNKNOWN
) {
316 adjust_subtree_auth(root
, mds_authority_t(a
,b
));
318 void adjust_bounded_subtree_auth(CDir
*dir
, set
<CDir
*>& bounds
, mds_authority_t auth
);
319 void adjust_bounded_subtree_auth(CDir
*dir
, set
<CDir
*>& bounds
, mds_rank_t a
) {
320 adjust_bounded_subtree_auth(dir
, bounds
, mds_authority_t(a
, CDIR_AUTH_UNKNOWN
));
322 void adjust_bounded_subtree_auth(CDir
*dir
, vector
<dirfrag_t
>& bounds
, mds_authority_t auth
);
323 void adjust_bounded_subtree_auth(CDir
*dir
, vector
<dirfrag_t
>& bounds
, mds_rank_t a
) {
324 adjust_bounded_subtree_auth(dir
, bounds
, mds_authority_t(a
, CDIR_AUTH_UNKNOWN
));
326 void map_dirfrag_set(list
<dirfrag_t
>& dfs
, set
<CDir
*>& result
);
327 void try_subtree_merge(CDir
*root
);
328 void try_subtree_merge_at(CDir
*root
, set
<CInode
*> *to_eval
);
329 void subtree_merge_writebehind_finish(CInode
*in
, MutationRef
& mut
);
330 void eval_subtree_root(CInode
*diri
);
331 CDir
*get_subtree_root(CDir
*dir
);
332 CDir
*get_projected_subtree_root(CDir
*dir
);
333 bool is_leaf_subtree(CDir
*dir
) {
334 assert(subtrees
.count(dir
));
335 return subtrees
[dir
].empty();
337 void remove_subtree(CDir
*dir
);
338 bool is_subtree(CDir
*root
) {
339 return subtrees
.count(root
);
341 void get_subtree_bounds(CDir
*root
, set
<CDir
*>& bounds
);
342 void get_wouldbe_subtree_bounds(CDir
*root
, set
<CDir
*>& bounds
);
343 void verify_subtree_bounds(CDir
*root
, const set
<CDir
*>& bounds
);
344 void verify_subtree_bounds(CDir
*root
, const list
<dirfrag_t
>& bounds
);
346 void project_subtree_rename(CInode
*diri
, CDir
*olddir
, CDir
*newdir
);
347 void adjust_subtree_after_rename(CInode
*diri
, CDir
*olddir
, bool pop
);
349 void get_auth_subtrees(set
<CDir
*>& s
);
350 void get_fullauth_subtrees(set
<CDir
*>& s
);
353 int num_subtrees_fullauth();
354 int num_subtrees_fullnonauth();
358 // delayed cache expire
359 map
<CDir
*, map
<mds_rank_t
, MCacheExpire
*> > delayed_expire
; // subtree root -> expire msg
363 ceph::unordered_map
<metareqid_t
, MDRequestRef
> active_requests
;
366 int get_num_client_requests();
368 MDRequestRef
request_start(MClientRequest
*req
);
369 MDRequestRef
request_start_slave(metareqid_t rid
, __u32 attempt
, Message
*m
);
370 MDRequestRef
request_start_internal(int op
);
371 bool have_request(metareqid_t rid
) {
372 return active_requests
.count(rid
);
374 MDRequestRef
request_get(metareqid_t rid
);
375 void request_pin_ref(MDRequestRef
& r
, CInode
*ref
, vector
<CDentry
*>& trace
);
376 void request_finish(MDRequestRef
& mdr
);
377 void request_forward(MDRequestRef
& mdr
, mds_rank_t mds
, int port
=0);
378 void dispatch_request(MDRequestRef
& mdr
);
379 void request_drop_foreign_locks(MDRequestRef
& mdr
);
380 void request_drop_non_rdlocks(MDRequestRef
& r
);
381 void request_drop_locks(MDRequestRef
& r
);
382 void request_cleanup(MDRequestRef
& r
);
384 void request_kill(MDRequestRef
& r
); // called when session closes
386 // journal/snap helpers
387 CInode
*pick_inode_snap(CInode
*in
, snapid_t follows
);
388 CInode
*cow_inode(CInode
*in
, snapid_t last
);
389 void journal_cow_dentry(MutationImpl
*mut
, EMetaBlob
*metablob
, CDentry
*dn
,
390 snapid_t follows
=CEPH_NOSNAP
,
391 CInode
**pcow_inode
=0, CDentry::linkage_t
*dnl
=0);
392 void journal_cow_inode(MutationRef
& mut
, EMetaBlob
*metablob
, CInode
*in
, snapid_t follows
=CEPH_NOSNAP
,
393 CInode
**pcow_inode
=0);
394 void journal_dirty_inode(MutationImpl
*mut
, EMetaBlob
*metablob
, CInode
*in
, snapid_t follows
=CEPH_NOSNAP
);
396 void project_rstat_inode_to_frag(CInode
*cur
, CDir
*parent
, snapid_t first
,
397 int linkunlink
, SnapRealm
*prealm
);
398 void _project_rstat_inode_to_frag(inode_t
& inode
, snapid_t ofirst
, snapid_t last
,
399 CDir
*parent
, int linkunlink
, bool update_inode
);
400 void project_rstat_frag_to_inode(nest_info_t
& rstat
, nest_info_t
& accounted_rstat
,
401 snapid_t ofirst
, snapid_t last
,
402 CInode
*pin
, bool cow_head
);
403 void broadcast_quota_to_client(CInode
*in
);
404 void predirty_journal_parents(MutationRef mut
, EMetaBlob
*blob
,
405 CInode
*in
, CDir
*parent
,
406 int flags
, int linkunlink
=0,
407 snapid_t follows
=CEPH_NOSNAP
);
410 void add_uncommitted_master(metareqid_t reqid
, LogSegment
*ls
, set
<mds_rank_t
> &slaves
, bool safe
=false) {
411 uncommitted_masters
[reqid
].ls
= ls
;
412 uncommitted_masters
[reqid
].slaves
= slaves
;
413 uncommitted_masters
[reqid
].safe
= safe
;
415 void wait_for_uncommitted_master(metareqid_t reqid
, MDSInternalContextBase
*c
) {
416 uncommitted_masters
[reqid
].waiters
.push_back(c
);
418 bool have_uncommitted_master(metareqid_t reqid
, mds_rank_t from
) {
419 auto p
= uncommitted_masters
.find(reqid
);
420 return p
!= uncommitted_masters
.end() && p
->second
.slaves
.count(from
) > 0;
422 void log_master_commit(metareqid_t reqid
);
423 void logged_master_update(metareqid_t reqid
);
424 void _logged_master_commit(metareqid_t reqid
);
425 void committed_master_slave(metareqid_t r
, mds_rank_t from
);
426 void finish_committed_masters();
428 void _logged_slave_commit(mds_rank_t from
, metareqid_t reqid
);
432 set
<mds_rank_t
> recovery_set
;
435 void set_recovery_set(set
<mds_rank_t
>& s
);
436 void handle_mds_failure(mds_rank_t who
);
437 void handle_mds_recovery(mds_rank_t who
);
441 // from EImportStart w/o EImportFinish during journal replay
442 map
<dirfrag_t
, vector
<dirfrag_t
> > my_ambiguous_imports
;
444 map
<mds_rank_t
, map
<dirfrag_t
, vector
<dirfrag_t
> > > other_ambiguous_imports
;
446 map
<mds_rank_t
, map
<metareqid_t
, MDSlaveUpdate
*> > uncommitted_slave_updates
; // slave: for replay.
447 map
<CInode
*, int> uncommitted_slave_rename_olddir
; // slave: preserve the non-auth dir until seeing commit.
448 map
<CInode
*, int> uncommitted_slave_unlink
; // slave: preserve the unlinked inode until seeing commit.
450 // track master requests whose slaves haven't acknowledged commit
452 set
<mds_rank_t
> slaves
;
454 list
<MDSInternalContextBase
*> waiters
;
458 umaster() : ls(NULL
), safe(false), committing(false), recovering(false) {}
460 map
<metareqid_t
, umaster
> uncommitted_masters
; // master: req -> slave set
462 set
<metareqid_t
> pending_masters
;
463 map
<int, set
<metareqid_t
> > ambiguous_slave_updates
;
465 friend class ESlaveUpdate
;
466 friend class ECommitted
;
468 bool resolves_pending
;
469 set
<mds_rank_t
> resolve_gather
; // nodes i need resolves from
470 set
<mds_rank_t
> resolve_ack_gather
; // nodes i need a resolve_ack from
471 map
<metareqid_t
, mds_rank_t
> need_resolve_rollback
; // rollbacks i'm writing to the journal
472 map
<mds_rank_t
, MMDSResolve
*> delayed_resolve
;
474 void handle_resolve(MMDSResolve
*m
);
475 void handle_resolve_ack(MMDSResolveAck
*m
);
476 void process_delayed_resolve();
477 void discard_delayed_resolve(mds_rank_t who
);
478 void maybe_resolve_finish();
479 void disambiguate_my_imports();
480 void disambiguate_other_imports();
481 void trim_unlinked_inodes();
482 void add_uncommitted_slave_update(metareqid_t reqid
, mds_rank_t master
, MDSlaveUpdate
*);
483 void finish_uncommitted_slave_update(metareqid_t reqid
, mds_rank_t master
);
484 MDSlaveUpdate
* get_uncommitted_slave_update(metareqid_t reqid
, mds_rank_t master
);
486 void recalc_auth_bits(bool replay
);
487 void remove_inode_recursive(CInode
*in
);
489 bool is_ambiguous_slave_update(metareqid_t reqid
, mds_rank_t master
) {
490 auto p
= ambiguous_slave_updates
.find(master
);
491 return p
!= ambiguous_slave_updates
.end() && p
->second
.count(reqid
);
493 void add_ambiguous_slave_update(metareqid_t reqid
, mds_rank_t master
) {
494 ambiguous_slave_updates
[master
].insert(reqid
);
496 void remove_ambiguous_slave_update(metareqid_t reqid
, mds_rank_t master
) {
497 auto p
= ambiguous_slave_updates
.find(master
);
498 auto q
= p
->second
.find(reqid
);
499 assert(q
!= p
->second
.end());
501 if (p
->second
.empty())
502 ambiguous_slave_updates
.erase(p
);
505 void add_rollback(metareqid_t reqid
, mds_rank_t master
) {
506 need_resolve_rollback
[reqid
] = master
;
508 void finish_rollback(metareqid_t reqid
);
511 void add_ambiguous_import(dirfrag_t base
, const vector
<dirfrag_t
>& bounds
);
512 void add_ambiguous_import(CDir
*base
, const set
<CDir
*>& bounds
);
513 bool have_ambiguous_import(dirfrag_t base
) {
514 return my_ambiguous_imports
.count(base
);
516 void get_ambiguous_import_bounds(dirfrag_t base
, vector
<dirfrag_t
>& bounds
) {
517 assert(my_ambiguous_imports
.count(base
));
518 bounds
= my_ambiguous_imports
[base
];
520 void cancel_ambiguous_import(CDir
*);
521 void finish_ambiguous_import(dirfrag_t dirino
);
522 void resolve_start(MDSInternalContext
*resolve_done_
);
523 void send_resolves();
524 void send_slave_resolves();
525 void send_subtree_resolves();
526 void maybe_send_pending_resolves() {
527 if (resolves_pending
)
528 send_subtree_resolves();
531 void _move_subtree_map_bound(dirfrag_t df
, dirfrag_t oldparent
, dirfrag_t newparent
,
532 map
<dirfrag_t
,vector
<dirfrag_t
> >& subtrees
);
533 ESubtreeMap
*create_subtree_map();
536 void clean_open_file_lists();
540 bool rejoins_pending
;
541 set
<mds_rank_t
> rejoin_gather
; // nodes from whom i need a rejoin
542 set
<mds_rank_t
> rejoin_sent
; // nodes i sent a rejoin to
543 set
<mds_rank_t
> rejoin_ack_sent
; // nodes i sent a rejoin to
544 set
<mds_rank_t
> rejoin_ack_gather
; // nodes from whom i need a rejoin ack
545 map
<mds_rank_t
,map
<inodeno_t
,map
<client_t
,Capability::Import
> > > rejoin_imported_caps
;
546 map
<inodeno_t
,pair
<mds_rank_t
,map
<client_t
,Capability::Export
> > > rejoin_slave_exports
;
547 map
<client_t
,entity_inst_t
> rejoin_client_map
;
549 map
<inodeno_t
,map
<client_t
,cap_reconnect_t
> > cap_exports
; // ino -> client -> capex
550 map
<inodeno_t
,mds_rank_t
> cap_export_targets
; // ino -> auth mds
552 map
<inodeno_t
,map
<client_t
,map
<mds_rank_t
,cap_reconnect_t
> > > cap_imports
; // ino -> client -> frommds -> capex
553 set
<inodeno_t
> cap_imports_missing
;
554 map
<inodeno_t
, list
<MDSInternalContextBase
*> > cap_reconnect_waiters
;
555 int cap_imports_num_opening
;
557 set
<CInode
*> rejoin_undef_inodes
;
558 set
<CInode
*> rejoin_potential_updated_scatterlocks
;
559 set
<CDir
*> rejoin_undef_dirfrags
;
560 map
<mds_rank_t
, set
<CInode
*> > rejoin_unlinked_inodes
;
562 vector
<CInode
*> rejoin_recover_q
, rejoin_check_q
;
563 list
<SimpleLock
*> rejoin_eval_locks
;
564 list
<MDSInternalContextBase
*> rejoin_waiters
;
566 void rejoin_walk(CDir
*dir
, MMDSCacheRejoin
*rejoin
);
567 void handle_cache_rejoin(MMDSCacheRejoin
*m
);
568 void handle_cache_rejoin_weak(MMDSCacheRejoin
*m
);
569 CInode
* rejoin_invent_inode(inodeno_t ino
, snapid_t last
);
570 CDir
* rejoin_invent_dirfrag(dirfrag_t df
);
571 void handle_cache_rejoin_strong(MMDSCacheRejoin
*m
);
572 void rejoin_scour_survivor_replicas(mds_rank_t from
, MMDSCacheRejoin
*ack
,
573 set
<vinodeno_t
>& acked_inodes
,
574 set
<SimpleLock
*>& gather_locks
);
575 void handle_cache_rejoin_ack(MMDSCacheRejoin
*m
);
576 void rejoin_send_acks();
577 void rejoin_trim_undef_inodes();
578 void maybe_send_pending_rejoins() {
580 rejoin_send_rejoins();
582 std::unique_ptr
<MDSInternalContext
> rejoin_done
;
583 std::unique_ptr
<MDSInternalContext
> resolve_done
;
585 void rejoin_start(MDSInternalContext
*rejoin_done_
);
586 void rejoin_gather_finish();
587 void rejoin_send_rejoins();
588 void rejoin_export_caps(inodeno_t ino
, client_t client
, const cap_reconnect_t
& icr
,
590 cap_exports
[ino
][client
] = icr
;
591 cap_export_targets
[ino
] = target
;
593 void rejoin_recovered_caps(inodeno_t ino
, client_t client
, const cap_reconnect_t
& icr
,
594 mds_rank_t frommds
=MDS_RANK_NONE
) {
595 cap_imports
[ino
][client
][frommds
] = icr
;
597 const cap_reconnect_t
*get_replay_cap_reconnect(inodeno_t ino
, client_t client
) {
598 if (cap_imports
.count(ino
) &&
599 cap_imports
[ino
].count(client
) &&
600 cap_imports
[ino
][client
].count(MDS_RANK_NONE
)) {
601 return &cap_imports
[ino
][client
][MDS_RANK_NONE
];
605 void remove_replay_cap_reconnect(inodeno_t ino
, client_t client
) {
606 assert(cap_imports
[ino
].size() == 1);
607 assert(cap_imports
[ino
][client
].size() == 1);
608 cap_imports
.erase(ino
);
610 void wait_replay_cap_reconnect(inodeno_t ino
, MDSInternalContextBase
*c
) {
611 cap_reconnect_waiters
[ino
].push_back(c
);
614 // [reconnect/rejoin caps]
615 struct reconnected_cap_info_t
{
617 snapid_t snap_follows
;
619 reconnected_cap_info_t() :
620 realm_ino(0), snap_follows(0), dirty_caps(0) {}
622 map
<inodeno_t
,map
<client_t
, reconnected_cap_info_t
> > reconnected_caps
; // inode -> client -> snap_follows,realmino
623 map
<inodeno_t
,map
<client_t
, snapid_t
> > reconnected_snaprealms
; // realmino -> client -> realmseq
625 void add_reconnected_cap(client_t client
, inodeno_t ino
, const cap_reconnect_t
& icr
) {
626 reconnected_cap_info_t
&info
= reconnected_caps
[ino
][client
];
627 info
.realm_ino
= inodeno_t(icr
.capinfo
.snaprealm
);
628 info
.snap_follows
= icr
.snap_follows
;
630 void set_reconnected_dirty_caps(client_t client
, inodeno_t ino
, int dirty
) {
631 reconnected_cap_info_t
&info
= reconnected_caps
[ino
][client
];
632 info
.dirty_caps
|= dirty
;
634 void add_reconnected_snaprealm(client_t client
, inodeno_t ino
, snapid_t seq
) {
635 reconnected_snaprealms
[ino
][client
] = seq
;
638 friend class C_MDC_RejoinOpenInoFinish
;
639 friend class C_MDC_RejoinSessionsOpened
;
640 void rejoin_open_ino_finish(inodeno_t ino
, int ret
);
641 void rejoin_open_sessions_finish(map
<client_t
,entity_inst_t
> client_map
,
642 map
<client_t
,uint64_t>& sseqmap
);
643 bool process_imported_caps();
644 void choose_lock_states_and_reconnect_caps();
645 void prepare_realm_split(SnapRealm
*realm
, client_t client
, inodeno_t ino
,
646 map
<client_t
,MClientSnap
*>& splits
);
647 void do_realm_invalidate_and_update_notify(CInode
*in
, int snapop
, bool nosend
=false);
648 void send_snaps(map
<client_t
,MClientSnap
*>& splits
);
649 Capability
* rejoin_import_cap(CInode
*in
, client_t client
, const cap_reconnect_t
& icr
, mds_rank_t frommds
);
650 void finish_snaprealm_reconnect(client_t client
, SnapRealm
*realm
, snapid_t seq
);
651 void try_reconnect_cap(CInode
*in
, Session
*session
);
652 void export_remaining_imported_caps();
654 // cap imports. delayed snap parent opens.
655 // realm inode -> client -> cap inodes needing to split to this realm
656 map
<CInode
*,set
<CInode
*> > missing_snap_parents
;
657 map
<client_t
,set
<CInode
*> > delayed_imported_caps
;
659 void do_cap_import(Session
*session
, CInode
*in
, Capability
*cap
,
660 uint64_t p_cap_id
, ceph_seq_t p_seq
, ceph_seq_t p_mseq
,
661 int peer
, int p_flags
);
662 void do_delayed_cap_imports();
663 void rebuild_need_snapflush(CInode
*head_in
, SnapRealm
*realm
, client_t client
,
664 snapid_t snap_follows
);
665 void check_realm_past_parents(SnapRealm
*realm
, bool reconnect
);
666 void open_snap_parents();
668 bool open_undef_inodes_dirfrags();
669 void opened_undef_inode(CInode
*in
);
670 void opened_undef_dirfrag(CDir
*dir
) {
671 rejoin_undef_dirfrags
.erase(dir
);
674 void reissue_all_caps();
678 friend class Migrator
;
679 friend class MDBalancer
;
681 // StrayManager needs to be able to remove_inode() from us
682 // when it is done purging
683 friend class StrayManager
;
685 // File size recovery
687 RecoveryQueue recovery_queue
;
688 void identify_files_to_recover();
690 void start_files_to_recover();
691 void do_file_recover();
692 void queue_file_recover(CInode
*in
);
693 void _queued_file_recover_cow(CInode
*in
, MutationRef
& mut
);
696 std::unique_ptr
<Migrator
> migrator
;
699 explicit MDCache(MDSRank
*m
, PurgeQueue
&purge_queue_
);
706 CInode
*get_root() { return root
; }
707 CInode
*get_myin() { return myin
; }
709 size_t get_cache_size() { return lru
.lru_get_size(); }
712 bool trim(uint64_t count
=0);
714 void trim_lru(uint64_t count
, map
<mds_rank_t
, MCacheExpire
*>& expiremap
);
715 bool trim_dentry(CDentry
*dn
, map
<mds_rank_t
, MCacheExpire
*>& expiremap
);
716 void trim_dirfrag(CDir
*dir
, CDir
*con
,
717 map
<mds_rank_t
, MCacheExpire
*>& expiremap
);
718 bool trim_inode(CDentry
*dn
, CInode
*in
, CDir
*con
,
719 map
<mds_rank_t
,class MCacheExpire
*>& expiremap
);
720 void send_expire_messages(map
<mds_rank_t
, MCacheExpire
*>& expiremap
);
721 void trim_non_auth(); // trim out trimmable non-auth items
723 bool trim_non_auth_subtree(CDir
*directory
);
724 void standby_trim_segment(LogSegment
*ls
);
725 void try_trim_non_auth_subtree(CDir
*dir
);
726 bool can_trim_non_auth_dirfrag(CDir
*dir
) {
727 return my_ambiguous_imports
.count((dir
)->dirfrag()) == 0 &&
728 uncommitted_slave_rename_olddir
.count(dir
->inode
) == 0;
732 * For all unreferenced inodes, dirs, dentries below an inode, compose
733 * expiry messages. This is used when giving up all replicas of entities
734 * for an MDS peer in the 'stopping' state, such that the peer can
735 * empty its cache and finish shutting down.
737 * We have to make sure we're only expiring un-referenced items to
738 * avoid interfering with ongoing stray-movement (we can't distinguish
739 * between the "moving my strays" and "waiting for my cache to empty"
740 * phases within 'stopping')
742 * @return false if we completed cleanly, true if caller should stop
743 * expiring because we hit something with refs.
745 bool expire_recursive(
747 std::map
<mds_rank_t
, MCacheExpire
*>& expiremap
);
749 void trim_client_leases();
750 void check_memory_usage();
752 utime_t last_recall_state
;
756 set
<inodeno_t
> shutdown_exported_strays
;
758 void shutdown_start();
759 void shutdown_check();
760 bool shutdown_pass();
761 bool shutdown_export_strays();
762 bool shutdown(); // clear cache (ie at shutodwn)
764 bool did_shutdown_log_cap
;
767 bool have_inode(vinodeno_t vino
) {
768 if (vino
.snapid
== CEPH_NOSNAP
)
769 return inode_map
.count(vino
.ino
) ? true : false;
771 return snap_inode_map
.count(vino
) ? true : false;
773 bool have_inode(inodeno_t ino
, snapid_t snap
=CEPH_NOSNAP
) {
774 return have_inode(vinodeno_t(ino
, snap
));
776 CInode
* get_inode(vinodeno_t vino
) {
777 if (vino
.snapid
== CEPH_NOSNAP
) {
778 auto p
= inode_map
.find(vino
.ino
);
779 if (p
!= inode_map
.end())
782 auto p
= snap_inode_map
.find(vino
);
783 if (p
!= snap_inode_map
.end())
788 CInode
* get_inode(inodeno_t ino
, snapid_t s
=CEPH_NOSNAP
) {
789 return get_inode(vinodeno_t(ino
, s
));
792 CDir
* get_dirfrag(dirfrag_t df
) {
793 CInode
*in
= get_inode(df
.ino
);
796 return in
->get_dirfrag(df
.frag
);
798 CDir
* get_dirfrag(inodeno_t ino
, const string
& dn
) {
799 CInode
*in
= get_inode(ino
);
802 frag_t fg
= in
->pick_dirfrag(dn
);
803 return in
->get_dirfrag(fg
);
805 CDir
* get_force_dirfrag(dirfrag_t df
, bool replay
) {
806 CInode
*diri
= get_inode(df
.ino
);
809 CDir
*dir
= force_dir_fragment(diri
, df
.frag
, replay
);
811 dir
= diri
->get_dirfrag(df
.frag
);
815 MDSCacheObject
*get_object(MDSCacheObjectInfo
&info
);
820 void add_inode(CInode
*in
);
822 void remove_inode(CInode
*in
);
824 void touch_inode(CInode
*in
) {
825 if (in
->get_parent_dn())
826 touch_dentry(in
->get_projected_parent_dn());
829 void touch_dentry(CDentry
*dn
) {
830 if (dn
->state_test(CDentry::STATE_BOTTOMLRU
)) {
831 bottom_lru
.lru_midtouch(dn
);
836 lru
.lru_midtouch(dn
);
839 void touch_dentry_bottom(CDentry
*dn
) {
840 if (dn
->state_test(CDentry::STATE_BOTTOMLRU
))
842 lru
.lru_bottouch(dn
);
846 void inode_remove_replica(CInode
*in
, mds_rank_t rep
, bool rejoin
,
847 set
<SimpleLock
*>& gather_locks
);
848 void dentry_remove_replica(CDentry
*dn
, mds_rank_t rep
, set
<SimpleLock
*>& gather_locks
);
850 void rename_file(CDentry
*srcdn
, CDentry
*destdn
);
854 void truncate_inode(CInode
*in
, LogSegment
*ls
);
855 void _truncate_inode(CInode
*in
, LogSegment
*ls
);
856 void truncate_inode_finish(CInode
*in
, LogSegment
*ls
);
857 void truncate_inode_logged(CInode
*in
, MutationRef
& mut
);
859 void add_recovered_truncate(CInode
*in
, LogSegment
*ls
);
860 void remove_recovered_truncate(CInode
*in
, LogSegment
*ls
);
861 void start_recovered_truncates();
865 CDir
*get_auth_container(CDir
*in
);
866 CDir
*get_export_container(CDir
*dir
);
867 void find_nested_exports(CDir
*dir
, set
<CDir
*>& s
);
868 void find_nested_exports_under(CDir
*import
, CDir
*dir
, set
<CDir
*>& s
);
872 bool opening_root
, open
;
873 list
<MDSInternalContextBase
*> waiting_for_open
;
877 void create_unlinked_system_inode(CInode
*in
, inodeno_t ino
,
879 CInode
*create_system_inode(inodeno_t ino
, int mode
);
880 CInode
*create_root_inode();
882 void create_empty_hierarchy(MDSGather
*gather
);
883 void create_mydir_hierarchy(MDSGather
*gather
);
885 bool is_open() { return open
; }
886 void wait_for_open(MDSInternalContextBase
*c
) {
887 waiting_for_open
.push_back(c
);
890 void open_root_inode(MDSInternalContextBase
*c
);
892 void open_mydir_inode(MDSInternalContextBase
*c
);
893 void populate_mydir();
895 void _create_system_file(CDir
*dir
, const char *name
, CInode
*in
, MDSInternalContextBase
*fin
);
896 void _create_system_file_finish(MutationRef
& mut
, CDentry
*dn
,
897 version_t dpv
, MDSInternalContextBase
*fin
);
899 void open_foreign_mdsdir(inodeno_t ino
, MDSInternalContextBase
*c
);
900 CDir
*get_stray_dir(CInode
*in
);
901 CDentry
*get_or_create_stray_dentry(CInode
*in
);
903 MDSInternalContextBase
*_get_waiter(MDRequestRef
& mdr
, Message
*req
, MDSInternalContextBase
*fin
);
906 * Find the given dentry (and whether it exists or not), its ancestors,
907 * and get them all into memory and usable on this MDS. This function
908 * makes a best-effort attempt to load everything; if it needs to
909 * go away and do something then it will put the request on a waitlist.
910 * It prefers the mdr, then the req, then the fin. (At least one of these
913 * At least one of the params mdr, req, and fin must be non-null.
915 * @param mdr The MDRequest associated with the path. Can be null.
916 * @param req The Message associated with the path. Can be null.
917 * @param fin The Context associated with the path. Can be null.
918 * @param path The path to traverse to.
919 * @param pdnvec Data return parameter -- on success, contains a
920 * vector of dentries. On failure, is either empty or contains the
921 * full trace of traversable dentries.
922 * @param pin Data return parameter -- if successful, points to the inode
923 * associated with filepath. If unsuccessful, is null.
924 * @param onfail Specifies different lookup failure behaviors. If set to
925 * MDS_TRAVERSE_DISCOVERXLOCK, path_traverse will succeed on null
926 * dentries (instead of returning -ENOENT). If set to
927 * MDS_TRAVERSE_FORWARD, it will forward the request to the auth
928 * MDS if that becomes appropriate (ie, if it doesn't know the contents
929 * of a directory). If set to MDS_TRAVERSE_DISCOVER, it
930 * will attempt to look up the path from a different MDS (and bring them
931 * into its cache as replicas).
933 * @returns 0 on success, 1 on "not done yet", 2 on "forwarding", -errno otherwise.
934 * If it returns 1, the requester associated with this call has been placed
935 * on the appropriate waitlist, and it should unwind itself and back out.
936 * If it returns 2 the request has been forwarded, and again the requester
937 * should unwind itself and back out.
939 int path_traverse(MDRequestRef
& mdr
, Message
*req
, MDSInternalContextBase
*fin
, const filepath
& path
,
940 vector
<CDentry
*> *pdnvec
, CInode
**pin
, int onfail
);
942 CInode
*cache_traverse(const filepath
& path
);
944 void open_remote_dirfrag(CInode
*diri
, frag_t fg
, MDSInternalContextBase
*fin
);
945 CInode
*get_dentry_inode(CDentry
*dn
, MDRequestRef
& mdr
, bool projected
=false);
947 bool parallel_fetch(map
<inodeno_t
,filepath
>& pathmap
, set
<inodeno_t
>& missing
);
948 bool parallel_fetch_traverse_dir(inodeno_t ino
, filepath
& path
,
949 set
<CDir
*>& fetch_queue
, set
<inodeno_t
>& missing
,
950 C_GatherBuilder
&gather_bld
);
952 void open_remote_dentry(CDentry
*dn
, bool projected
, MDSInternalContextBase
*fin
,
953 bool want_xlocked
=false);
954 void _open_remote_dentry_finish(CDentry
*dn
, inodeno_t ino
, MDSInternalContextBase
*fin
,
955 bool want_xlocked
, int r
);
957 void make_trace(vector
<CDentry
*>& trace
, CInode
*in
);
960 struct open_ino_info_t
{
961 vector
<inode_backpointer_t
> ancestors
;
962 set
<mds_rank_t
> checked
;
964 mds_rank_t auth_hint
;
966 bool fetch_backtrace
;
973 list
<MDSInternalContextBase
*> waiters
;
974 open_ino_info_t() : checking(MDS_RANK_NONE
), auth_hint(MDS_RANK_NONE
),
975 check_peers(true), fetch_backtrace(true), discover(false),
976 want_replica(false), want_xlocked(false), tid(0), pool(-1),
979 ceph_tid_t open_ino_last_tid
;
980 map
<inodeno_t
,open_ino_info_t
> opening_inodes
;
982 void _open_ino_backtrace_fetched(inodeno_t ino
, bufferlist
& bl
, int err
);
983 void _open_ino_parent_opened(inodeno_t ino
, int ret
);
984 void _open_ino_traverse_dir(inodeno_t ino
, open_ino_info_t
& info
, int err
);
985 void _open_ino_fetch_dir(inodeno_t ino
, MMDSOpenIno
*m
, CDir
*dir
, bool parent
);
986 int open_ino_traverse_dir(inodeno_t ino
, MMDSOpenIno
*m
,
987 vector
<inode_backpointer_t
>& ancestors
,
988 bool discover
, bool want_xlocked
, mds_rank_t
*hint
);
989 void open_ino_finish(inodeno_t ino
, open_ino_info_t
& info
, int err
);
990 void do_open_ino(inodeno_t ino
, open_ino_info_t
& info
, int err
);
991 void do_open_ino_peer(inodeno_t ino
, open_ino_info_t
& info
);
992 void handle_open_ino(MMDSOpenIno
*m
, int err
=0);
993 void handle_open_ino_reply(MMDSOpenInoReply
*m
);
994 friend class C_IO_MDC_OpenInoBacktraceFetched
;
995 friend struct C_MDC_OpenInoTraverseDir
;
996 friend struct C_MDC_OpenInoParentOpened
;
999 void kick_open_ino_peers(mds_rank_t who
);
1000 void open_ino(inodeno_t ino
, int64_t pool
, MDSInternalContextBase
*fin
,
1001 bool want_replica
=true, bool want_xlocked
=false);
1003 // -- find_ino_peer --
1004 struct find_ino_peer_info_t
{
1007 MDSInternalContextBase
*fin
;
1009 mds_rank_t checking
;
1010 set
<mds_rank_t
> checked
;
1012 find_ino_peer_info_t() : tid(0), fin(NULL
), hint(MDS_RANK_NONE
), checking(MDS_RANK_NONE
) {}
1015 map
<ceph_tid_t
, find_ino_peer_info_t
> find_ino_peer
;
1016 ceph_tid_t find_ino_peer_last_tid
;
1018 void find_ino_peers(inodeno_t ino
, MDSInternalContextBase
*c
, mds_rank_t hint
=MDS_RANK_NONE
);
1019 void _do_find_ino_peer(find_ino_peer_info_t
& fip
);
1020 void handle_find_ino(MMDSFindIno
*m
);
1021 void handle_find_ino_reply(MMDSFindInoReply
*m
);
1022 void kick_find_ino_peers(mds_rank_t who
);
1026 void snaprealm_create(MDRequestRef
& mdr
, CInode
*in
);
1027 void _snaprealm_create_finish(MDRequestRef
& mdr
, MutationRef
& mut
, CInode
*in
);
1031 void fetch_backtrace(inodeno_t ino
, int64_t pool
, bufferlist
& bl
, Context
*fin
);
1032 uint64_t get_num_strays() const { return stray_manager
.get_num_strays(); }
1035 void scan_stray_dir(dirfrag_t next
=dirfrag_t());
1036 StrayManager stray_manager
;
1037 friend struct C_MDC_RetryScanStray
;
1038 friend class C_IO_MDC_FetchedBacktrace
;
1042 void dispatch(Message
*m
);
1046 void handle_discover(MDiscover
*dis
);
1047 void handle_discover_reply(MDiscoverReply
*m
);
1048 friend class C_MDC_Join
;
1051 void replicate_dir(CDir
*dir
, mds_rank_t to
, bufferlist
& bl
);
1052 void replicate_dentry(CDentry
*dn
, mds_rank_t to
, bufferlist
& bl
);
1053 void replicate_inode(CInode
*in
, mds_rank_t to
, bufferlist
& bl
,
1056 CDir
* add_replica_dir(bufferlist::iterator
& p
, CInode
*diri
, mds_rank_t from
, list
<MDSInternalContextBase
*>& finished
);
1057 CDentry
*add_replica_dentry(bufferlist::iterator
& p
, CDir
*dir
, list
<MDSInternalContextBase
*>& finished
);
1058 CInode
*add_replica_inode(bufferlist::iterator
& p
, CDentry
*dn
, list
<MDSInternalContextBase
*>& finished
);
1060 void replicate_stray(CDentry
*straydn
, mds_rank_t who
, bufferlist
& bl
);
1061 CDentry
*add_replica_stray(bufferlist
&bl
, mds_rank_t from
);
1065 void send_dentry_link(CDentry
*dn
, MDRequestRef
& mdr
);
1066 void send_dentry_unlink(CDentry
*dn
, CDentry
*straydn
, MDRequestRef
& mdr
);
1068 void handle_dentry_link(MDentryLink
*m
);
1069 void handle_dentry_unlink(MDentryUnlink
*m
);
1072 // -- fragmenting --
1078 list
<MDSInternalContextBase
*> waiters
;
1079 list
<frag_t
> old_frags
;
1080 bufferlist rollback
;
1081 ufragment() : bits(0), committed(false), ls(NULL
) {}
1083 map
<dirfrag_t
, ufragment
> uncommitted_fragments
;
1085 struct fragment_info_t
{
1088 list
<CDir
*> resultfrags
;
1090 // for deadlock detection
1092 utime_t last_cum_auth_pins_change
;
1093 int last_cum_auth_pins
;
1094 int num_remote_waiters
; // number of remote authpin waiters
1095 fragment_info_t() : bits(0), all_frozen(false), last_cum_auth_pins(0), num_remote_waiters(0) {}
1096 bool is_fragmenting() { return !resultfrags
.empty(); }
1098 map
<dirfrag_t
,fragment_info_t
> fragments
;
1100 void adjust_dir_fragments(CInode
*diri
, frag_t basefrag
, int bits
,
1101 list
<CDir
*>& frags
, list
<MDSInternalContextBase
*>& waiters
, bool replay
);
1102 void adjust_dir_fragments(CInode
*diri
,
1103 list
<CDir
*>& srcfrags
,
1104 frag_t basefrag
, int bits
,
1105 list
<CDir
*>& resultfrags
,
1106 list
<MDSInternalContextBase
*>& waiters
,
1108 CDir
*force_dir_fragment(CInode
*diri
, frag_t fg
, bool replay
=true);
1109 void get_force_dirfrag_bound_set(vector
<dirfrag_t
>& dfs
, set
<CDir
*>& bounds
);
1111 bool can_fragment(CInode
*diri
, list
<CDir
*>& dirs
);
1112 void fragment_freeze_dirs(list
<CDir
*>& dirs
);
1113 void fragment_mark_and_complete(MDRequestRef
& mdr
);
1114 void fragment_frozen(MDRequestRef
& mdr
, int r
);
1115 void fragment_unmark_unfreeze_dirs(list
<CDir
*>& dirs
);
1116 void dispatch_fragment_dir(MDRequestRef
& mdr
);
1117 void _fragment_logged(MDRequestRef
& mdr
);
1118 void _fragment_stored(MDRequestRef
& mdr
);
1119 void _fragment_committed(dirfrag_t f
, list
<CDir
*>& resultfrags
);
1120 void _fragment_finish(dirfrag_t f
, list
<CDir
*>& resultfrags
);
1122 friend class EFragment
;
1123 friend class C_MDC_FragmentFrozen
;
1124 friend class C_MDC_FragmentMarking
;
1125 friend class C_MDC_FragmentPrep
;
1126 friend class C_MDC_FragmentStore
;
1127 friend class C_MDC_FragmentCommit
;
1128 friend class C_IO_MDC_FragmentFinish
;
1130 void handle_fragment_notify(MMDSFragmentNotify
*m
);
1132 void add_uncommitted_fragment(dirfrag_t basedirfrag
, int bits
, list
<frag_t
>& old_frag
,
1133 LogSegment
*ls
, bufferlist
*rollback
=NULL
);
1134 void finish_uncommitted_fragment(dirfrag_t basedirfrag
, int op
);
1135 void rollback_uncommitted_fragment(dirfrag_t basedirfrag
, list
<frag_t
>& old_frags
);
1137 void wait_for_uncommitted_fragment(dirfrag_t dirfrag
, MDSInternalContextBase
*c
) {
1138 assert(uncommitted_fragments
.count(dirfrag
));
1139 uncommitted_fragments
[dirfrag
].waiters
.push_back(c
);
1141 void split_dir(CDir
*dir
, int byn
);
1142 void merge_dir(CInode
*diri
, frag_t fg
);
1143 void rollback_uncommitted_fragments();
1145 void find_stale_fragment_freeze();
1146 void fragment_freeze_inc_num_waiters(CDir
*dir
);
1147 bool fragment_are_all_frozen(CDir
*dir
);
1148 int get_num_fragmenting_dirs() { return fragments
.size(); }
1151 //int send_inode_updates(CInode *in);
1152 //void handle_inode_update(MInodeUpdate *m);
1154 int send_dir_updates(CDir
*in
, bool bcast
=false);
1155 void handle_dir_update(MDirUpdate
*m
);
1157 // -- cache expiration --
1158 void handle_cache_expire(MCacheExpire
*m
);
1159 void process_delayed_expire(CDir
*dir
);
1160 void discard_delayed_expire(CDir
*dir
);
1163 int dump_cache(const char *fn
, Formatter
*f
,
1164 const std::string
& dump_root
= "",
1167 int dump_cache() { return dump_cache(NULL
, NULL
); }
1168 int dump_cache(const std::string
&filename
);
1169 int dump_cache(Formatter
*f
);
1170 int dump_cache(const std::string
& dump_root
, int depth
, Formatter
*f
);
1172 int cache_status(Formatter
*f
);
1174 void dump_resolve_status(Formatter
*f
) const;
1175 void dump_rejoin_status(Formatter
*f
) const;
1180 void show_subtrees(int dbl
=10);
1182 CInode
*hack_pick_random_inode() {
1183 assert(!inode_map
.empty());
1184 int n
= rand() % inode_map
.size();
1185 auto p
= inode_map
.begin();
1191 void flush_dentry_work(MDRequestRef
& mdr
);
1193 * Resolve path to a dentry and pass it onto the ScrubStack.
1195 * TODO: return enough information to the original mdr formatter
1196 * and completion that they can subsequeuntly check the progress of
1197 * this scrub (we won't block them on a whole scrub as it can take a very
1200 void enqueue_scrub_work(MDRequestRef
& mdr
);
1201 void repair_inode_stats_work(MDRequestRef
& mdr
);
1202 void repair_dirfrag_stats_work(MDRequestRef
& mdr
);
1203 friend class C_MDC_RepairDirfragStats
;
1205 void flush_dentry(const string
& path
, Context
*fin
);
1207 * Create and start an OP_ENQUEUE_SCRUB
1209 void enqueue_scrub(const string
& path
, const std::string
&tag
,
1210 bool force
, bool recursive
, bool repair
,
1211 Formatter
*f
, Context
*fin
);
1212 void repair_inode_stats(CInode
*diri
);
1213 void repair_dirfrag_stats(CDir
*dir
);
1216 /* Because exports may fail, this set lets us keep track of inodes that need exporting. */
1217 std::set
<CInode
*> export_pin_queue
;
1220 class C_MDS_RetryRequest
: public MDSInternalContext
{
1224 C_MDS_RetryRequest(MDCache
*c
, MDRequestRef
& r
);
1225 void finish(int r
) override
;