-
Notifications
You must be signed in to change notification settings - Fork 5.9k
/
Client.cc
15174 lines (12943 loc) · 414 KB
/
Client.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// -*- 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.
*
*/
// unix-ey fs stuff
#include <unistd.h>
#include <sys/types.h>
#include <time.h>
#include <utime.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/utsname.h>
#include <sys/uio.h>
#include <boost/lexical_cast.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include "common/async/waiter.h"
#if defined(__FreeBSD__)
#define XATTR_CREATE 0x1
#define XATTR_REPLACE 0x2
#else
#include <sys/xattr.h>
#endif
#if defined(__linux__)
#include <linux/falloc.h>
#endif
#include <sys/statvfs.h>
#include "common/config.h"
#include "common/version.h"
#include "common/async/blocked_completion.h"
#include "mon/MonClient.h"
#include "messages/MClientCaps.h"
#include "messages/MClientLease.h"
#include "messages/MClientQuota.h"
#include "messages/MClientReclaim.h"
#include "messages/MClientReclaimReply.h"
#include "messages/MClientReconnect.h"
#include "messages/MClientReply.h"
#include "messages/MClientRequest.h"
#include "messages/MClientRequestForward.h"
#include "messages/MClientSession.h"
#include "messages/MClientSnap.h"
#include "messages/MClientMetrics.h"
#include "messages/MCommandReply.h"
#include "messages/MFSMap.h"
#include "messages/MFSMapUser.h"
#include "messages/MMDSMap.h"
#include "messages/MOSDMap.h"
#include "mds/flock.h"
#include "mds/cephfs_features.h"
#include "osd/OSDMap.h"
#include "osdc/Filer.h"
#include "common/Cond.h"
#include "common/perf_counters.h"
#include "common/admin_socket.h"
#include "common/errno.h"
#include "include/str_list.h"
#define dout_subsys ceph_subsys_client
#include "include/lru.h"
#include "include/compat.h"
#include "include/stringify.h"
#include "include/random.h"
#include "Client.h"
#include "Inode.h"
#include "Dentry.h"
#include "Delegation.h"
#include "Dir.h"
#include "ClientSnapRealm.h"
#include "Fh.h"
#include "MetaSession.h"
#include "MetaRequest.h"
#include "ObjecterWriteback.h"
#include "posix_acl.h"
#include "include/ceph_assert.h"
#include "include/stat.h"
#include "include/cephfs/ceph_ll_client.h"
#if HAVE_GETGROUPLIST
#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#endif
#undef dout_prefix
#define dout_prefix *_dout << "client." << whoami << " "
#define tout(cct) if (!cct->_conf->client_trace.empty()) traceout
// FreeBSD fails to define this
#ifndef O_DSYNC
#define O_DSYNC 0x0
#endif
// Darwin fails to define this
#ifndef O_RSYNC
#define O_RSYNC 0x0
#endif
#ifndef O_DIRECT
#define O_DIRECT 0x0
#endif
#define DEBUG_GETATTR_CAPS (CEPH_CAP_XATTR_SHARED)
using namespace TOPNSPC::common;
namespace bs = boost::system;
namespace ca = ceph::async;
void client_flush_set_callback(void *p, ObjectCacher::ObjectSet *oset)
{
Client *client = static_cast<Client*>(p);
client->flush_set_callback(oset);
}
// -------------
Client::CommandHook::CommandHook(Client *client) :
m_client(client)
{
}
int Client::CommandHook::call(
std::string_view command,
const cmdmap_t& cmdmap,
Formatter *f,
std::ostream& errss,
bufferlist& out)
{
f->open_object_section("result");
{
std::scoped_lock l{m_client->client_lock};
if (command == "mds_requests")
m_client->dump_mds_requests(f);
else if (command == "mds_sessions") {
bool cap_dump = false;
cmd_getval(cmdmap, "cap_dump", cap_dump);
m_client->dump_mds_sessions(f, cap_dump);
} else if (command == "dump_cache")
m_client->dump_cache(f);
else if (command == "kick_stale_sessions")
m_client->_kick_stale_sessions();
else if (command == "status")
m_client->dump_status(f);
else
ceph_abort_msg("bad command registered");
}
f->close_section();
return 0;
}
// -------------
dir_result_t::dir_result_t(Inode *in, const UserPerm& perms)
: inode(in), offset(0), next_offset(2),
release_count(0), ordered_count(0), cache_index(0), start_shared_gen(0),
perms(perms)
{ }
void Client::_reset_faked_inos()
{
ino_t start = 1024;
free_faked_inos.clear();
free_faked_inos.insert(start, (uint32_t)-1 - start + 1);
last_used_faked_ino = 0;
last_used_faked_root = 0;
_use_faked_inos = sizeof(ino_t) < 8 || cct->_conf->client_use_faked_inos;
}
void Client::_assign_faked_ino(Inode *in)
{
if (0 == last_used_faked_ino)
last_used_faked_ino = last_used_faked_ino + 2048; // start(1024)~2048 reserved for _assign_faked_root
interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_ino + 1);
if (it == free_faked_inos.end() && last_used_faked_ino > 0) {
last_used_faked_ino = 2048;
it = free_faked_inos.lower_bound(last_used_faked_ino + 1);
}
ceph_assert(it != free_faked_inos.end());
if (last_used_faked_ino < it.get_start()) {
ceph_assert(it.get_len() > 0);
last_used_faked_ino = it.get_start();
} else {
++last_used_faked_ino;
ceph_assert(it.get_start() + it.get_len() > last_used_faked_ino);
}
in->faked_ino = last_used_faked_ino;
free_faked_inos.erase(in->faked_ino);
faked_ino_map[in->faked_ino] = in->vino();
}
/*
* In the faked mode, if you export multiple subdirectories,
* you will see that the inode numbers of the exported subdirectories
* are the same. so we distinguish the mount point by reserving
* the "fake ids" between "1024~2048" and combining the last
* 10bits(0x3ff) of the "root inodes".
*/
void Client::_assign_faked_root(Inode *in)
{
interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_root + 1);
if (it == free_faked_inos.end() && last_used_faked_root > 0) {
last_used_faked_root = 0;
it = free_faked_inos.lower_bound(last_used_faked_root + 1);
}
assert(it != free_faked_inos.end());
vinodeno_t inode_info = in->vino();
uint64_t inode_num = (uint64_t)inode_info.ino;
ldout(cct, 10) << "inode_num " << inode_num << "inode_num & 0x3ff=" << (inode_num & 0x3ff)<< dendl;
last_used_faked_root = it.get_start() + (inode_num & 0x3ff); // 0x3ff mask and get_start will not exceed 2048
assert(it.get_start() + it.get_len() > last_used_faked_root);
in->faked_ino = last_used_faked_root;
free_faked_inos.erase(in->faked_ino);
faked_ino_map[in->faked_ino] = in->vino();
}
void Client::_release_faked_ino(Inode *in)
{
free_faked_inos.insert(in->faked_ino);
faked_ino_map.erase(in->faked_ino);
}
vinodeno_t Client::_map_faked_ino(ino_t ino)
{
vinodeno_t vino;
if (ino == 1)
vino = root->vino();
else if (faked_ino_map.count(ino))
vino = faked_ino_map[ino];
else
vino = vinodeno_t(0, CEPH_NOSNAP);
ldout(cct, 10) << __func__ << " " << ino << " -> " << vino << dendl;
return vino;
}
vinodeno_t Client::map_faked_ino(ino_t ino)
{
std::scoped_lock lock(client_lock);
return _map_faked_ino(ino);
}
// cons/des
Client::Client(Messenger *m, MonClient *mc, Objecter *objecter_)
: Dispatcher(m->cct),
timer(m->cct, timer_lock, false),
messenger(m),
monclient(mc),
objecter(objecter_),
whoami(mc->get_global_id()),
mount_state(CLIENT_UNMOUNTED, "Client::mountstate_lock"),
initialize_state(CLIENT_NEW, "Client::initstate_lock"),
async_ino_invalidator(m->cct),
async_dentry_invalidator(m->cct),
interrupt_finisher(m->cct),
remount_finisher(m->cct),
async_ino_releasor(m->cct),
objecter_finisher(m->cct),
m_command_hook(this),
fscid(0)
{
_reset_faked_inos();
user_id = cct->_conf->client_mount_uid;
group_id = cct->_conf->client_mount_gid;
fuse_default_permissions = cct->_conf.get_val<bool>(
"fuse_default_permissions");
if (cct->_conf->client_acl_type == "posix_acl")
acl_type = POSIX_ACL;
lru.lru_set_midpoint(cct->_conf->client_cache_mid);
// file handles
free_fd_set.insert(10, 1<<30);
mdsmap.reset(new MDSMap);
// osd interfaces
writeback_handler.reset(new ObjecterWriteback(objecter, &objecter_finisher,
&client_lock));
objectcacher.reset(new ObjectCacher(cct, "libcephfs", *writeback_handler, client_lock,
client_flush_set_callback, // all commit callback
(void*)this,
cct->_conf->client_oc_size,
cct->_conf->client_oc_max_objects,
cct->_conf->client_oc_max_dirty,
cct->_conf->client_oc_target_dirty,
cct->_conf->client_oc_max_dirty_age,
true));
}
Client::~Client()
{
ceph_assert(ceph_mutex_is_not_locked(client_lock));
// It is necessary to hold client_lock, because any inode destruction
// may call into ObjectCacher, which asserts that it's lock (which is
// client_lock) is held.
std::scoped_lock l{client_lock};
tear_down_cache();
}
void Client::tear_down_cache()
{
// fd's
for (auto &[fd, fh] : fd_map) {
ldout(cct, 1) << __func__ << " forcing close of fh " << fd << " ino " << fh->inode->ino << dendl;
_release_fh(fh);
}
fd_map.clear();
while (!opened_dirs.empty()) {
dir_result_t *dirp = *opened_dirs.begin();
ldout(cct, 1) << __func__ << " forcing close of dir " << dirp << " ino " << dirp->inode->ino << dendl;
_closedir(dirp);
}
// caps!
// *** FIXME ***
// empty lru
trim_cache();
ceph_assert(lru.lru_get_size() == 0);
// close root ino
ceph_assert(inode_map.size() <= 1 + root_parents.size());
if (root && inode_map.size() == 1 + root_parents.size()) {
delete root;
root = 0;
root_ancestor = 0;
while (!root_parents.empty())
root_parents.erase(root_parents.begin());
inode_map.clear();
_reset_faked_inos();
}
ceph_assert(inode_map.empty());
}
inodeno_t Client::get_root_ino()
{
std::scoped_lock l(client_lock);
if (use_faked_inos())
return root->faked_ino;
else
return root->ino;
}
Inode *Client::get_root()
{
std::scoped_lock l(client_lock);
root->ll_get();
return root;
}
// debug crapola
void Client::dump_inode(Formatter *f, Inode *in, set<Inode*>& did, bool disconnected)
{
filepath path;
in->make_long_path(path);
ldout(cct, 1) << "dump_inode: "
<< (disconnected ? "DISCONNECTED ":"")
<< "inode " << in->ino
<< " " << path
<< " ref " << in->get_num_ref()
<< " " << *in << dendl;
if (f) {
f->open_object_section("inode");
f->dump_stream("path") << path;
if (disconnected)
f->dump_int("disconnected", 1);
in->dump(f);
f->close_section();
}
did.insert(in);
if (in->dir) {
ldout(cct, 1) << " dir " << in->dir << " size " << in->dir->dentries.size() << dendl;
for (ceph::unordered_map<string, Dentry*>::iterator it = in->dir->dentries.begin();
it != in->dir->dentries.end();
++it) {
ldout(cct, 1) << " " << in->ino << " dn " << it->first << " " << it->second << " ref " << it->second->ref << dendl;
if (f) {
f->open_object_section("dentry");
it->second->dump(f);
f->close_section();
}
if (it->second->inode)
dump_inode(f, it->second->inode.get(), did, false);
}
}
}
void Client::dump_cache(Formatter *f)
{
set<Inode*> did;
ldout(cct, 1) << __func__ << dendl;
if (f)
f->open_array_section("cache");
if (root)
dump_inode(f, root, did, true);
// make a second pass to catch anything disconnected
for (ceph::unordered_map<vinodeno_t, Inode*>::iterator it = inode_map.begin();
it != inode_map.end();
++it) {
if (did.count(it->second))
continue;
dump_inode(f, it->second, did, true);
}
if (f)
f->close_section();
}
void Client::dump_status(Formatter *f)
{
ceph_assert(ceph_mutex_is_locked_by_me(client_lock));
ldout(cct, 1) << __func__ << dendl;
const epoch_t osd_epoch
= objecter->with_osdmap(std::mem_fn(&OSDMap::get_epoch));
if (f) {
f->open_object_section("metadata");
for (const auto& kv : metadata)
f->dump_string(kv.first.c_str(), kv.second);
f->close_section();
f->dump_int("dentry_count", lru.lru_get_size());
f->dump_int("dentry_pinned_count", lru.lru_get_num_pinned());
f->dump_int("id", get_nodeid().v);
entity_inst_t inst(messenger->get_myname(), messenger->get_myaddr_legacy());
f->dump_object("inst", inst);
f->dump_object("addr", inst.addr);
f->dump_stream("inst_str") << inst.name << " " << inst.addr.get_legacy_str();
f->dump_string("addr_str", inst.addr.get_legacy_str());
f->dump_int("inode_count", inode_map.size());
f->dump_int("mds_epoch", mdsmap->get_epoch());
f->dump_int("osd_epoch", osd_epoch);
f->dump_int("osd_epoch_barrier", cap_epoch_barrier);
f->dump_bool("blocklisted", blocklisted);
}
}
void Client::_pre_init()
{
timer.init();
objecter_finisher.start();
filer.reset(new Filer(objecter, &objecter_finisher));
objecter->enable_blocklist_events();
objectcacher->start();
}
int Client::init()
{
RWRef_t iref_writer(initialize_state, CLIENT_INITIALIZING, false);
ceph_assert(iref_writer.is_first_writer());
_pre_init();
{
std::scoped_lock l{client_lock};
messenger->add_dispatcher_tail(this);
}
_finish_init();
iref_writer.update_state(CLIENT_INITIALIZED);
return 0;
}
void Client::_finish_init()
{
{
std::scoped_lock l{client_lock};
// logger
PerfCountersBuilder plb(cct, "client", l_c_first, l_c_last);
plb.add_time_avg(l_c_reply, "reply", "Latency of receiving a reply on metadata request");
plb.add_time_avg(l_c_lat, "lat", "Latency of processing a metadata request");
plb.add_time_avg(l_c_wrlat, "wrlat", "Latency of a file data write operation");
plb.add_time_avg(l_c_read, "rdlat", "Latency of a file data read operation");
plb.add_time_avg(l_c_fsync, "fsync", "Latency of a file sync operation");
logger.reset(plb.create_perf_counters());
cct->get_perfcounters_collection()->add(logger.get());
}
cct->_conf.add_observer(this);
AdminSocket* admin_socket = cct->get_admin_socket();
int ret = admin_socket->register_command("mds_requests",
&m_command_hook,
"show in-progress mds requests");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("mds_sessions "
"name=cap_dump,type=CephBool,req=false",
&m_command_hook,
"show mds session state");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("dump_cache",
&m_command_hook,
"show in-memory metadata cache contents");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("kick_stale_sessions",
&m_command_hook,
"kick sessions that were remote reset");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("status",
&m_command_hook,
"show overall client status");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
}
void Client::shutdown()
{
ldout(cct, 1) << __func__ << dendl;
// If we were not mounted, but were being used for sending
// MDS commands, we may have sessions that need closing.
{
std::scoped_lock l{client_lock};
_close_sessions();
}
cct->_conf.remove_observer(this);
cct->get_admin_socket()->unregister_commands(&m_command_hook);
if (ino_invalidate_cb) {
ldout(cct, 10) << "shutdown stopping cache invalidator finisher" << dendl;
async_ino_invalidator.wait_for_empty();
async_ino_invalidator.stop();
}
if (dentry_invalidate_cb) {
ldout(cct, 10) << "shutdown stopping dentry invalidator finisher" << dendl;
async_dentry_invalidator.wait_for_empty();
async_dentry_invalidator.stop();
}
if (switch_interrupt_cb) {
ldout(cct, 10) << "shutdown stopping interrupt finisher" << dendl;
interrupt_finisher.wait_for_empty();
interrupt_finisher.stop();
}
if (remount_cb) {
ldout(cct, 10) << "shutdown stopping remount finisher" << dendl;
remount_finisher.wait_for_empty();
remount_finisher.stop();
}
if (ino_release_cb) {
ldout(cct, 10) << "shutdown stopping inode release finisher" << dendl;
async_ino_releasor.wait_for_empty();
async_ino_releasor.stop();
}
objectcacher->stop(); // outside of client_lock! this does a join.
/*
* We are shuting down the client.
*
* Just declare the state to CLIENT_NEW to block and fail any
* new comming "reader" and then try to wait all the in-flight
* "readers" to finish.
*/
RWRef_t iref_writer(initialize_state, CLIENT_NEW, false);
if (!iref_writer.is_first_writer())
return;
iref_writer.wait_readers_done();
{
std::scoped_lock l(timer_lock);
timer.shutdown();
}
objecter_finisher.wait_for_empty();
objecter_finisher.stop();
if (logger) {
cct->get_perfcounters_collection()->remove(logger.get());
logger.reset();
}
}
// ===================
// metadata cache stuff
void Client::trim_cache(bool trim_kernel_dcache)
{
uint64_t max = cct->_conf->client_cache_size;
ldout(cct, 20) << "trim_cache size " << lru.lru_get_size() << " max " << max << dendl;
unsigned last = 0;
while (lru.lru_get_size() != last) {
last = lru.lru_get_size();
if (!is_unmounting() && lru.lru_get_size() <= max) break;
// trim!
Dentry *dn = static_cast<Dentry*>(lru.lru_get_next_expire());
if (!dn)
break; // done
trim_dentry(dn);
}
if (trim_kernel_dcache && lru.lru_get_size() > max)
_invalidate_kernel_dcache();
// hose root?
if (lru.lru_get_size() == 0 && root && root->get_num_ref() == 0 && inode_map.size() == 1 + root_parents.size()) {
ldout(cct, 15) << "trim_cache trimmed root " << root << dendl;
delete root;
root = 0;
root_ancestor = 0;
while (!root_parents.empty())
root_parents.erase(root_parents.begin());
inode_map.clear();
_reset_faked_inos();
}
}
void Client::trim_cache_for_reconnect(MetaSession *s)
{
mds_rank_t mds = s->mds_num;
ldout(cct, 20) << __func__ << " mds." << mds << dendl;
int trimmed = 0;
list<Dentry*> skipped;
while (lru.lru_get_size() > 0) {
Dentry *dn = static_cast<Dentry*>(lru.lru_expire());
if (!dn)
break;
if ((dn->inode && dn->inode->caps.count(mds)) ||
dn->dir->parent_inode->caps.count(mds)) {
trim_dentry(dn);
trimmed++;
} else
skipped.push_back(dn);
}
for(list<Dentry*>::iterator p = skipped.begin(); p != skipped.end(); ++p)
lru.lru_insert_mid(*p);
ldout(cct, 20) << __func__ << " mds." << mds
<< " trimmed " << trimmed << " dentries" << dendl;
if (s->caps.size() > 0)
_invalidate_kernel_dcache();
}
void Client::trim_dentry(Dentry *dn)
{
ldout(cct, 15) << "trim_dentry unlinking dn " << dn->name
<< " in dir "
<< std::hex << dn->dir->parent_inode->ino << std::dec
<< dendl;
if (dn->inode) {
Inode *diri = dn->dir->parent_inode;
clear_dir_complete_and_ordered(diri, true);
}
unlink(dn, false, false); // drop dir, drop dentry
}
void Client::update_inode_file_size(Inode *in, int issued, uint64_t size,
uint64_t truncate_seq, uint64_t truncate_size)
{
uint64_t prior_size = in->size;
if (truncate_seq > in->truncate_seq ||
(truncate_seq == in->truncate_seq && size > in->size)) {
ldout(cct, 10) << "size " << in->size << " -> " << size << dendl;
in->size = size;
in->reported_size = size;
if (truncate_seq != in->truncate_seq) {
ldout(cct, 10) << "truncate_seq " << in->truncate_seq << " -> "
<< truncate_seq << dendl;
in->truncate_seq = truncate_seq;
in->oset.truncate_seq = truncate_seq;
// truncate cached file data
if (prior_size > size) {
_invalidate_inode_cache(in, truncate_size, prior_size - truncate_size);
}
}
// truncate inline data
if (in->inline_version < CEPH_INLINE_NONE) {
uint32_t len = in->inline_data.length();
if (size < len)
in->inline_data.splice(size, len - size);
}
}
if (truncate_seq >= in->truncate_seq &&
in->truncate_size != truncate_size) {
if (in->is_file()) {
ldout(cct, 10) << "truncate_size " << in->truncate_size << " -> "
<< truncate_size << dendl;
in->truncate_size = truncate_size;
in->oset.truncate_size = truncate_size;
} else {
ldout(cct, 0) << "Hmmm, truncate_seq && truncate_size changed on non-file inode!" << dendl;
}
}
}
void Client::update_inode_file_time(Inode *in, int issued, uint64_t time_warp_seq,
utime_t ctime, utime_t mtime, utime_t atime)
{
ldout(cct, 10) << __func__ << " " << *in << " " << ccap_string(issued)
<< " ctime " << ctime << " mtime " << mtime << dendl;
if (time_warp_seq > in->time_warp_seq)
ldout(cct, 10) << " mds time_warp_seq " << time_warp_seq
<< " is higher than local time_warp_seq "
<< in->time_warp_seq << dendl;
int warn = false;
// be careful with size, mtime, atime
if (issued & (CEPH_CAP_FILE_EXCL|
CEPH_CAP_FILE_WR|
CEPH_CAP_FILE_BUFFER|
CEPH_CAP_AUTH_EXCL|
CEPH_CAP_XATTR_EXCL)) {
ldout(cct, 30) << "Yay have enough caps to look at our times" << dendl;
if (ctime > in->ctime)
in->ctime = ctime;
if (time_warp_seq > in->time_warp_seq) {
//the mds updated times, so take those!
in->mtime = mtime;
in->atime = atime;
in->time_warp_seq = time_warp_seq;
} else if (time_warp_seq == in->time_warp_seq) {
//take max times
if (mtime > in->mtime)
in->mtime = mtime;
if (atime > in->atime)
in->atime = atime;
} else if (issued & CEPH_CAP_FILE_EXCL) {
//ignore mds values as we have a higher seq
} else warn = true;
} else {
ldout(cct, 30) << "Don't have enough caps, just taking mds' time values" << dendl;
if (time_warp_seq >= in->time_warp_seq) {
in->ctime = ctime;
in->mtime = mtime;
in->atime = atime;
in->time_warp_seq = time_warp_seq;
} else warn = true;
}
if (warn) {
ldout(cct, 0) << "WARNING: " << *in << " mds time_warp_seq "
<< time_warp_seq << " is lower than local time_warp_seq "
<< in->time_warp_seq
<< dendl;
}
}
void Client::_fragmap_remove_non_leaves(Inode *in)
{
for (map<frag_t,int>::iterator p = in->fragmap.begin(); p != in->fragmap.end(); )
if (!in->dirfragtree.is_leaf(p->first))
in->fragmap.erase(p++);
else
++p;
}
void Client::_fragmap_remove_stopped_mds(Inode *in, mds_rank_t mds)
{
for (auto p = in->fragmap.begin(); p != in->fragmap.end(); )
if (p->second == mds)
in->fragmap.erase(p++);
else
++p;
}
Inode * Client::add_update_inode(InodeStat *st, utime_t from,
MetaSession *session,
const UserPerm& request_perms)
{
Inode *in;
bool was_new = false;
if (inode_map.count(st->vino)) {
in = inode_map[st->vino];
ldout(cct, 12) << __func__ << " had " << *in << " caps " << ccap_string(st->cap.caps) << dendl;
} else {
in = new Inode(this, st->vino, &st->layout);
inode_map[st->vino] = in;
if (use_faked_inos())
_assign_faked_ino(in);
if (!root) {
root = in;
if (use_faked_inos())
_assign_faked_root(root);
root_ancestor = in;
cwd = root;
} else if (is_mounting()) {
root_parents[root_ancestor] = in;
root_ancestor = in;
}
// immutable bits
in->ino = st->vino.ino;
in->snapid = st->vino.snapid;
in->mode = st->mode & S_IFMT;
was_new = true;
}
in->rdev = st->rdev;
if (in->is_symlink())
in->symlink = st->symlink;
// only update inode if mds info is strictly newer, or it is the same and projected (odd).
bool new_version = false;
if (in->version == 0 ||
((st->cap.flags & CEPH_CAP_FLAG_AUTH) &&
(in->version & ~1) < st->version))
new_version = true;
int issued;
in->caps_issued(&issued);
issued |= in->caps_dirty();
int new_issued = ~issued & (int)st->cap.caps;
if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
!(issued & CEPH_CAP_AUTH_EXCL)) {
in->mode = st->mode;
in->uid = st->uid;
in->gid = st->gid;
in->btime = st->btime;
in->snap_btime = st->snap_btime;
}
if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
!(issued & CEPH_CAP_LINK_EXCL)) {
in->nlink = st->nlink;
}
if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
update_inode_file_time(in, issued, st->time_warp_seq,
st->ctime, st->mtime, st->atime);
}
if (new_version ||
(new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
in->layout = st->layout;
update_inode_file_size(in, issued, st->size, st->truncate_seq, st->truncate_size);
}
if (in->is_dir()) {
if (new_version || (new_issued & CEPH_CAP_FILE_SHARED)) {
in->dirstat = st->dirstat;
}
// dir_layout/rstat/quota are not tracked by capability, update them only if
// the inode stat is from auth mds
if (new_version || (st->cap.flags & CEPH_CAP_FLAG_AUTH)) {
in->dir_layout = st->dir_layout;
ldout(cct, 20) << " dir hash is " << (int)in->dir_layout.dl_dir_hash << dendl;
in->rstat = st->rstat;
in->quota = st->quota;
in->dir_pin = st->dir_pin;
}
// move me if/when version reflects fragtree changes.
if (in->dirfragtree != st->dirfragtree) {
in->dirfragtree = st->dirfragtree;
_fragmap_remove_non_leaves(in);
}
}
if ((in->xattr_version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
st->xattrbl.length() &&
st->xattr_version > in->xattr_version) {
auto p = st->xattrbl.cbegin();
decode(in->xattrs, p);
in->xattr_version = st->xattr_version;
}
if (st->inline_version > in->inline_version) {
in->inline_data = st->inline_data;
in->inline_version = st->inline_version;
}
/* always take a newer change attr */
if (st->change_attr > in->change_attr)
in->change_attr = st->change_attr;
if (st->version > in->version)
in->version = st->version;
if (was_new)
ldout(cct, 12) << __func__ << " adding " << *in << " caps " << ccap_string(st->cap.caps) << dendl;
if (!st->cap.caps)
return in; // as with readdir returning indoes in different snaprealms (no caps!)
if (in->snapid == CEPH_NOSNAP) {
add_update_cap(in, session, st->cap.cap_id, st->cap.caps, st->cap.wanted,
st->cap.seq, st->cap.mseq, inodeno_t(st->cap.realm),
st->cap.flags, request_perms);
if (in->auth_cap && in->auth_cap->session == session) {
in->max_size = st->max_size;
in->rstat = st->rstat;
}
// setting I_COMPLETE needs to happen after adding the cap
if (in->is_dir() &&
(st->cap.caps & CEPH_CAP_FILE_SHARED) &&
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
in->dirstat.nfiles == 0 &&
in->dirstat.nsubdirs == 0) {
ldout(cct, 10) << " marking (I_COMPLETE|I_DIR_ORDERED) on empty dir " << *in << dendl;
in->flags |= I_COMPLETE | I_DIR_ORDERED;
if (in->dir) {
ldout(cct, 10) << " dir is open on empty dir " << in->ino << " with "
<< in->dir->dentries.size() << " entries, marking all dentries null" << dendl;
in->dir->readdir_cache.clear();
for (const auto& p : in->dir->dentries) {
unlink(p.second, true, true); // keep dir, keep dentry
}
if (in->dir->dentries.empty())
close_dir(in->dir);
}
}
} else {
in->snap_caps |= st->cap.caps;
}
return in;
}
/*
* insert_dentry_inode - insert + link a single dentry + inode into the metadata cache.
*/
Dentry *Client::insert_dentry_inode(Dir *dir, const string& dname, LeaseStat *dlease,
Inode *in, utime_t from, MetaSession *session,
Dentry *old_dentry)
{
Dentry *dn = NULL;
if (dir->dentries.count(dname))
dn = dir->dentries[dname];