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
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_OBJECTCACHER_H
#define CEPH_OBJECTCACHER_H
#include "include/types.h"
#include "include/lru.h"
#include "include/Context.h"
#include "include/xlist.h"
#include "include/common_fwd.h"
#include "common/Cond.h"
#include "common/Finisher.h"
#include "common/Thread.h"
#include "common/zipkin_trace.h"
#include "Objecter.h"
#include "Striper.h"
class WritebackHandler;
enum {
l_objectcacher_first = 25000,
l_objectcacher_cache_ops_hit, // ops we satisfy completely from cache
l_objectcacher_cache_ops_miss, // ops we don't satisfy completely from cache
l_objectcacher_cache_bytes_hit, // bytes read directly from cache
l_objectcacher_cache_bytes_miss, // bytes we couldn't read directly
// from cache
l_objectcacher_data_read, // total bytes read out
l_objectcacher_data_written, // bytes written to cache
l_objectcacher_data_flushed, // bytes flushed to WritebackHandler
l_objectcacher_overwritten_in_flush, // bytes overwritten while
// flushing is in progress
l_objectcacher_write_ops_blocked, // total write ops we delayed due
// to dirty limits
l_objectcacher_write_bytes_blocked, // total number of write bytes
// we delayed due to dirty
// limits
l_objectcacher_write_time_blocked, // total time in seconds spent
// blocking a write due to dirty
// limits
l_objectcacher_last,
};
class ObjectCacher {
PerfCounters *perfcounter;
public:
CephContext *cct;
class Object;
struct ObjectSet;
class C_ReadFinish;
typedef void (*flush_set_callback_t) (void *p, ObjectSet *oset);
// read scatter/gather
struct OSDRead {
std::vector<ObjectExtent> extents;
snapid_t snap;
ceph::buffer::list *bl;
int fadvise_flags;
OSDRead(snapid_t s, ceph::buffer::list *b, int f)
: snap(s), bl(b), fadvise_flags(f) {}
};
OSDRead *prepare_read(snapid_t snap, ceph::buffer::list *b, int f) const {
return new OSDRead(snap, b, f);
}
// write scatter/gather
struct OSDWrite {
std::vector<ObjectExtent> extents;
SnapContext snapc;
ceph::buffer::list bl;
ceph::real_time mtime;
int fadvise_flags;
ceph_tid_t journal_tid;
OSDWrite(const SnapContext& sc, const ceph::buffer::list& b, ceph::real_time mt,
int f, ceph_tid_t _journal_tid)
: snapc(sc), bl(b), mtime(mt), fadvise_flags(f),
journal_tid(_journal_tid) {}
};
OSDWrite *prepare_write(const SnapContext& sc,
const ceph::buffer::list &b,
ceph::real_time mt,
int f,
ceph_tid_t journal_tid) const {
return new OSDWrite(sc, b, mt, f, journal_tid);
}
// ******* BufferHead *********
class BufferHead : public LRUObject {
public:
// states
static const int STATE_MISSING = 0;
static const int STATE_CLEAN = 1;
static const int STATE_ZERO = 2; // NOTE: these are *clean* zeros
static const int STATE_DIRTY = 3;
static const int STATE_RX = 4;
static const int STATE_TX = 5;
static const int STATE_ERROR = 6; // a read error occurred
private:
// my fields
int state;
int ref;
struct {
loff_t start, length; // bh extent in object
} ex;
bool dontneed; //indicate bh don't need by anyone
bool nocache; //indicate bh don't need by this caller
public:
Object *ob;
ceph::buffer::list bl;
ceph_tid_t last_write_tid; // version of bh (if non-zero)
ceph_tid_t last_read_tid; // tid of last read op (if any)
ceph::real_time last_write;
SnapContext snapc;
ceph_tid_t journal_tid;
int error; // holds return value for failed reads
std::map<loff_t, std::list<Context*> > waitfor_read;
// cons
explicit BufferHead(Object *o) :
state(STATE_MISSING),
ref(0),
dontneed(false),
nocache(false),
ob(o),
last_write_tid(0),
last_read_tid(0),
journal_tid(0),
error(0) {
ex.start = ex.length = 0;
}
// extent
loff_t start() const { return ex.start; }
void set_start(loff_t s) { ex.start = s; }
loff_t length() const { return ex.length; }
void set_length(loff_t l) { ex.length = l; }
loff_t end() const { return ex.start + ex.length; }
loff_t last() const { return end() - 1; }
// states
void set_state(int s) {
if (s == STATE_RX || s == STATE_TX) get();
if (state == STATE_RX || state == STATE_TX) put();
state = s;
}
int get_state() const { return state; }
inline int get_error() const {
return error;
}
inline void set_error(int _error) {
error = _error;
}
inline ceph_tid_t get_journal_tid() const {
return journal_tid;
}
inline void set_journal_tid(ceph_tid_t _journal_tid) {
journal_tid = _journal_tid;
}
bool is_missing() const { return state == STATE_MISSING; }
bool is_dirty() const { return state == STATE_DIRTY; }
bool is_clean() const { return state == STATE_CLEAN; }
bool is_zero() const { return state == STATE_ZERO; }
bool is_tx() const { return state == STATE_TX; }
bool is_rx() const { return state == STATE_RX; }
bool is_error() const { return state == STATE_ERROR; }
// reference counting
int get() {
ceph_assert(ref >= 0);
if (ref == 0) lru_pin();
return ++ref;
}
int put() {
ceph_assert(ref > 0);
if (ref == 1) lru_unpin();
--ref;
return ref;
}
void set_dontneed(bool v) {
dontneed = v;
}
bool get_dontneed() const {
return dontneed;
}
void set_nocache(bool v) {
nocache = v;
}
bool get_nocache() const {
return nocache;
}
inline bool can_merge_journal(BufferHead *bh) const {
return (get_journal_tid() == bh->get_journal_tid());
}
struct ptr_lt {
bool operator()(const BufferHead* l, const BufferHead* r) const {
const Object *lob = l->ob;
const Object *rob = r->ob;
const ObjectSet *loset = lob->oset;
const ObjectSet *roset = rob->oset;
if (loset != roset)
return loset < roset;
if (lob != rob)
return lob < rob;
if (l->start() != r->start())
return l->start() < r->start();
return l < r;
}
};
};
// ******* Object *********
class Object : public LRUObject {
private:
// ObjectCacher::Object fields
int ref;
ObjectCacher *oc;
sobject_t oid;
friend struct ObjectSet;
public:
uint64_t object_no;
ObjectSet *oset;
xlist<Object*>::item set_item;
object_locator_t oloc;
uint64_t truncate_size, truncate_seq;
bool complete;
bool exists;
std::map<loff_t, BufferHead*> data;
ceph_tid_t last_write_tid; // version of bh (if non-zero)
ceph_tid_t last_commit_tid; // last update committed.
int dirty_or_tx;
std::map< ceph_tid_t, std::list<Context*> > waitfor_commit;
xlist<C_ReadFinish*> reads;
Object(const Object&) = delete;
Object& operator=(const Object&) = delete;
Object(ObjectCacher *_oc, sobject_t o, uint64_t ono, ObjectSet *os,
object_locator_t& l, uint64_t ts, uint64_t tq) :
ref(0),
oc(_oc),
oid(o), object_no(ono), oset(os), set_item(this), oloc(l),
truncate_size(ts), truncate_seq(tq),
complete(false), exists(true),
last_write_tid(0), last_commit_tid(0),
dirty_or_tx(0) {
// add to set
os->objects.push_back(&set_item);
}
~Object() {
reads.clear();
ceph_assert(ref == 0);
ceph_assert(data.empty());
ceph_assert(dirty_or_tx == 0);
set_item.remove_myself();
}
sobject_t get_soid() const { return oid; }
object_t get_oid() { return oid.oid; }
snapid_t get_snap() { return oid.snap; }
ObjectSet *get_object_set() const { return oset; }
std::string get_namespace() { return oloc.nspace; }
uint64_t get_object_number() const { return object_no; }
const object_locator_t& get_oloc() const { return oloc; }
void set_object_locator(object_locator_t& l) { oloc = l; }
bool can_close() const {
if (lru_is_expireable()) {
ceph_assert(data.empty());
ceph_assert(waitfor_commit.empty());
return true;
}
return false;
}
/**
* Check buffers and waiters for consistency
* - no overlapping buffers
* - index in map matches BH
* - waiters fall within BH
*/
void audit_buffers();
/**
* find first buffer that includes or follows an offset
*
* @param offset object byte offset
* @return iterator pointing to buffer, or data.end()
*/
std::map<loff_t,BufferHead*>::const_iterator data_lower_bound(loff_t offset) const {
auto p = data.lower_bound(offset);
if (p != data.begin() &&
(p == data.end() || p->first > offset)) {
--p; // might overlap!
if (p->first + p->second->length() <= offset)
++p; // doesn't overlap.
}
return p;
}
// bh
// add to my map
void add_bh(BufferHead *bh) {
if (data.empty())
get();
ceph_assert(data.count(bh->start()) == 0);
data[bh->start()] = bh;
}
void remove_bh(BufferHead *bh) {
ceph_assert(data.count(bh->start()));
data.erase(bh->start());
if (data.empty())
put();
}
bool is_empty() const { return data.empty(); }
// mid-level
BufferHead *split(BufferHead *bh, loff_t off);
void merge_left(BufferHead *left, BufferHead *right);
bool can_merge_bh(BufferHead *left, BufferHead *right);
void try_merge_bh(BufferHead *bh);
void maybe_rebuild_buffer(BufferHead *bh);
bool is_cached(loff_t off, loff_t len) const;
bool include_all_cached_data(loff_t off, loff_t len);
int map_read(ObjectExtent &ex,
std::map<loff_t, BufferHead*>& hits,
std::map<loff_t, BufferHead*>& missing,
std::map<loff_t, BufferHead*>& rx,
std::map<loff_t, BufferHead*>& errors);
BufferHead *map_write(ObjectExtent &ex, ceph_tid_t tid);
void replace_journal_tid(BufferHead *bh, ceph_tid_t tid);
void truncate(loff_t s);
void discard(loff_t off, loff_t len, C_GatherBuilder* commit_gather);
// reference counting
int get() {
ceph_assert(ref >= 0);
if (ref == 0) lru_pin();
return ++ref;
}
int put() {
ceph_assert(ref > 0);
if (ref == 1) lru_unpin();
--ref;
return ref;
}
};
struct ObjectSet {
void *parent;
inodeno_t ino;
uint64_t truncate_seq, truncate_size;
int64_t poolid;
xlist<Object*> objects;
int dirty_or_tx;
bool return_enoent;
ObjectSet(void *p, int64_t _poolid, inodeno_t i)
: parent(p), ino(i), truncate_seq(0),
truncate_size(0), poolid(_poolid), dirty_or_tx(0),
return_enoent(false) {}
};
// ******* ObjectCacher *********
// ObjectCacher fields
private:
WritebackHandler& writeback_handler;
bool scattered_write;
std::string name;
ceph::mutex& lock;
uint64_t max_dirty, target_dirty, max_size, max_objects;
ceph::timespan max_dirty_age;
bool block_writes_upfront;
ZTracer::Endpoint trace_endpoint;
flush_set_callback_t flush_set_callback;
void *flush_set_callback_arg;
// indexed by pool_id
std::vector<ceph::unordered_map<sobject_t, Object*> > objects;
std::list<Context*> waitfor_read;
ceph_tid_t last_read_tid;
std::set<BufferHead*, BufferHead::ptr_lt> dirty_or_tx_bh;
LRU bh_lru_dirty, bh_lru_rest;
LRU ob_lru;
ceph::condition_variable flusher_cond;
bool flusher_stop;
void flusher_entry();
class FlusherThread : public Thread {
ObjectCacher *oc;
public:
explicit FlusherThread(ObjectCacher *o) : oc(o) {}
void *entry() override {
oc->flusher_entry();
return 0;
}
} flusher_thread;
Finisher finisher;
// objects
Object *get_object_maybe(sobject_t oid, object_locator_t &l) {
// have it?
if (((uint32_t)l.pool < objects.size()) &&
(objects[l.pool].count(oid)))
return objects[l.pool][oid];
return NULL;
}
Object *get_object(sobject_t oid, uint64_t object_no, ObjectSet *oset,
object_locator_t &l, uint64_t truncate_size,
uint64_t truncate_seq);
void close_object(Object *ob);
// bh stats
ceph::condition_variable stat_cond;
loff_t stat_clean;
loff_t stat_zero;
loff_t stat_dirty;
loff_t stat_rx;
loff_t stat_tx;
loff_t stat_missing;
loff_t stat_error;
loff_t stat_dirty_waiting; // bytes that writers are waiting on to write
size_t stat_nr_dirty_waiters;
void verify_stats() const;
void bh_stat_add(BufferHead *bh);
void bh_stat_sub(BufferHead *bh);
loff_t get_stat_tx() const { return stat_tx; }
loff_t get_stat_rx() const { return stat_rx; }
loff_t get_stat_dirty() const { return stat_dirty; }
loff_t get_stat_clean() const { return stat_clean; }
loff_t get_stat_zero() const { return stat_zero; }
loff_t get_stat_dirty_waiting() const { return stat_dirty_waiting; }
size_t get_stat_nr_dirty_waiters() const { return stat_nr_dirty_waiters; }
void touch_bh(BufferHead *bh) {
if (bh->is_dirty())
bh_lru_dirty.lru_touch(bh);
else
bh_lru_rest.lru_touch(bh);
bh->set_dontneed(false);
bh->set_nocache(false);
touch_ob(bh->ob);
}
void touch_ob(Object *ob) {
ob_lru.lru_touch(ob);
}
void bottouch_ob(Object *ob) {
ob_lru.lru_bottouch(ob);
}
// bh states
void bh_set_state(BufferHead *bh, int s);
void copy_bh_state(BufferHead *bh1, BufferHead *bh2) {
bh_set_state(bh2, bh1->get_state());
}
void mark_missing(BufferHead *bh) {
bh_set_state(bh,BufferHead::STATE_MISSING);
}
void mark_clean(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_CLEAN);
}
void mark_zero(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_ZERO);
}
void mark_rx(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_RX);
}
void mark_tx(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_TX); }
void mark_error(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_ERROR);
}
void mark_dirty(BufferHead *bh) {
bh_set_state(bh, BufferHead::STATE_DIRTY);
bh_lru_dirty.lru_touch(bh);
//bh->set_dirty_stamp(ceph_clock_now());
}
void bh_add(Object *ob, BufferHead *bh);
void bh_remove(Object *ob, BufferHead *bh);
// io
void bh_read(BufferHead *bh, int op_flags,
const ZTracer::Trace &parent_trace);
void bh_write(BufferHead *bh, const ZTracer::Trace &parent_trace);
void bh_write_scattered(std::list<BufferHead*>& blist);
void bh_write_adjacencies(BufferHead *bh, ceph::real_time cutoff,
int64_t *amount, int *max_count);
void trim();
void flush(ZTracer::Trace *trace, loff_t amount=0);
/**
* flush a range of buffers
*
* Flush any buffers that intersect the specified extent. If len==0,
* flush *all* buffers for the object.
*
* @param o object
* @param off start offset
* @param len extent length, or 0 for entire object
* @return true if object was already clean/flushed.
*/
bool flush(Object *o, loff_t off, loff_t len,
ZTracer::Trace *trace);
loff_t release(Object *o);
void purge(Object *o);
int64_t reads_outstanding;
ceph::condition_variable read_cond;
int _readx(OSDRead *rd, ObjectSet *oset, Context *onfinish,
bool external_call, ZTracer::Trace *trace);
void retry_waiting_reads();
public:
void bh_read_finish(int64_t poolid, sobject_t oid, ceph_tid_t tid,
loff_t offset, uint64_t length,
ceph::buffer::list &bl, int r,
bool trust_enoent);
void bh_write_commit(int64_t poolid, sobject_t oid,
std::vector<std::pair<loff_t, uint64_t> >& ranges,
ceph_tid_t t, int r);
class C_WriteCommit;
class C_WaitForWrite;
void perf_start();
void perf_stop();
ObjectCacher(CephContext *cct_, std::string name, WritebackHandler& wb, ceph::mutex& l,
flush_set_callback_t flush_callback,
void *flush_callback_arg,
uint64_t max_bytes, uint64_t max_objects,
uint64_t max_dirty, uint64_t target_dirty, double max_age,
bool block_writes_upfront);
~ObjectCacher();
void start() {
flusher_thread.create("flusher");
}
void stop() {
ceph_assert(flusher_thread.is_started());
lock.lock(); // hmm.. watch out for deadlock!
flusher_stop = true;
flusher_cond.notify_all();
lock.unlock();
flusher_thread.join();
}
class C_RetryRead;
// non-blocking. async.
/**
* @note total read size must be <= INT_MAX, since
* the return value is total bytes read
*/
int readx(OSDRead *rd, ObjectSet *oset, Context *onfinish,
ZTracer::Trace *parent_trace = nullptr);
int writex(OSDWrite *wr, ObjectSet *oset, Context *onfreespace,
ZTracer::Trace *parent_trace = nullptr);
bool is_cached(ObjectSet *oset, std::vector<ObjectExtent>& extents,
snapid_t snapid);
private:
// write blocking
int _wait_for_write(OSDWrite *wr, uint64_t len, ObjectSet *oset,
ZTracer::Trace *trace, Context *onfreespace);
void _maybe_wait_for_writeback(uint64_t len, ZTracer::Trace *trace);
bool _flush_set_finish(C_GatherBuilder *gather, Context *onfinish);
void _discard(ObjectSet *oset, const std::vector<ObjectExtent>& exls,
C_GatherBuilder* gather);
void _discard_finish(ObjectSet *oset, bool was_dirty, Context* on_finish);
public:
bool set_is_empty(ObjectSet *oset);
bool set_is_cached(ObjectSet *oset);
bool set_is_dirty_or_committing(ObjectSet *oset);
bool flush_set(ObjectSet *oset, Context *onfinish=0);
bool flush_set(ObjectSet *oset, std::vector<ObjectExtent>& ex,
ZTracer::Trace *trace, Context *onfinish = 0);
bool flush_all(Context *onfinish = 0);
void purge_set(ObjectSet *oset);
// returns # of bytes not released (ie non-clean)
loff_t release_set(ObjectSet *oset);
uint64_t release_all();
void discard_set(ObjectSet *oset, const std::vector<ObjectExtent>& ex);
void discard_writeback(ObjectSet *oset, const std::vector<ObjectExtent>& ex,
Context* on_finish);
/**
* Retry any in-flight reads that get -ENOENT instead of marking
* them zero, and get rid of any cached -ENOENTs.
* After this is called and the cache's lock is unlocked,
* any new requests will treat -ENOENT normally.
*/
void clear_nonexistence(ObjectSet *oset);
// cache sizes
void set_max_dirty(uint64_t v) {
max_dirty = v;
}
void set_target_dirty(int64_t v) {
target_dirty = v;
}
void set_max_size(int64_t v) {
max_size = v;
}
void set_max_dirty_age(double a) {
max_dirty_age = ceph::make_timespan(a);
}
void set_max_objects(int64_t v) {
max_objects = v;
}
// file functions
/*** async+caching (non-blocking) file interface ***/
int file_is_cached(ObjectSet *oset, file_layout_t *layout,
snapid_t snapid, loff_t offset, uint64_t len) {
std::vector<ObjectExtent> extents;
Striper::file_to_extents(cct, oset->ino, layout, offset, len,
oset->truncate_size, extents);
return is_cached(oset, extents, snapid);
}
int file_read(ObjectSet *oset, file_layout_t *layout, snapid_t snapid,
loff_t offset, uint64_t len, ceph::buffer::list *bl, int flags,
Context *onfinish) {
OSDRead *rd = prepare_read(snapid, bl, flags);
Striper::file_to_extents(cct, oset->ino, layout, offset, len,
oset->truncate_size, rd->extents);
return readx(rd, oset, onfinish);
}
int file_write(ObjectSet *oset, file_layout_t *layout,
const SnapContext& snapc, loff_t offset, uint64_t len,
ceph::buffer::list& bl, ceph::real_time mtime, int flags) {
OSDWrite *wr = prepare_write(snapc, bl, mtime, flags, 0);
Striper::file_to_extents(cct, oset->ino, layout, offset, len,
oset->truncate_size, wr->extents);
return writex(wr, oset, nullptr);
}
bool file_flush(ObjectSet *oset, file_layout_t *layout,
const SnapContext& snapc, loff_t offset, uint64_t len,
Context *onfinish) {
std::vector<ObjectExtent> extents;
Striper::file_to_extents(cct, oset->ino, layout, offset, len,
oset->truncate_size, extents);
ZTracer::Trace trace;
return flush_set(oset, extents, &trace, onfinish);
}
};
inline std::ostream& operator<<(std::ostream &out,
const ObjectCacher::BufferHead &bh)
{
out << "bh[ " << &bh << " "
<< bh.start() << "~" << bh.length()
<< " " << bh.ob
<< " (" << bh.bl.length() << ")"
<< " v " << bh.last_write_tid;
if (bh.get_journal_tid() != 0) {
out << " j " << bh.get_journal_tid();
}
if (bh.is_tx()) out << " tx";
if (bh.is_rx()) out << " rx";
if (bh.is_dirty()) out << " dirty";
if (bh.is_clean()) out << " clean";
if (bh.is_zero()) out << " zero";
if (bh.is_missing()) out << " missing";
if (bh.bl.length() > 0) out << " firstbyte=" << (int)bh.bl[0];
if (bh.error) out << " error=" << bh.error;
out << "]";
out << " waiters = {";
for (auto it = bh.waitfor_read.begin(); it != bh.waitfor_read.end(); ++it) {
out << " " << it->first << "->[";
for (auto lit = it->second.begin();
lit != it->second.end(); ++lit) {
out << *lit << ", ";
}
out << "]";
}
out << "}";
return out;
}
inline std::ostream& operator<<(std::ostream &out,
const ObjectCacher::ObjectSet &os)
{
return out << "objectset[" << os.ino
<< " ts " << os.truncate_seq << "/" << os.truncate_size
<< " objects " << os.objects.size()
<< " dirty_or_tx " << os.dirty_or_tx
<< "]";
}
inline std::ostream& operator<<(std::ostream &out,
const ObjectCacher::Object &ob)
{
out << "object["
<< ob.get_soid() << " oset " << ob.oset << std::dec
<< " wr " << ob.last_write_tid << "/" << ob.last_commit_tid;
if (ob.complete)
out << " COMPLETE";
if (!ob.exists)
out << " !EXISTS";
out << "]";
return out;
}
#endif
|