forked from tricky/php-memcache
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathmemcache.c
2709 lines (2267 loc) · 71.9 KB
/
memcache.c
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
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2007 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_0.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Antony Dovgal <tony@daylessday.org> |
| Mikael Johansson <mikael AT synd DOT info> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include <stdio.h>
#include <fcntl.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <zlib.h>
#include <time.h>
#include "ext/standard/crc32.h"
#include "ext/standard/info.h"
#include "ext/standard/php_string.h"
#include "ext/standard/php_var.h"
#include "ext/standard/php_smart_str.h"
#include "php_network.h"
#include "php_memcache.h"
#include "memcache_queue.h"
#if HAVE_MEMCACHE_SESSION
#include "ext/session/php_session.h"
#endif
#ifndef ZEND_ENGINE_2
#define OnUpdateLong OnUpdateInt
#endif
/* True global resources - no need for thread safety here */
static int le_memcache_pool, le_pmemcache;
static zend_class_entry *memcache_class_entry_ptr;
ZEND_DECLARE_MODULE_GLOBALS(memcache)
/* {{{ memcache_functions[]
*/
zend_function_entry memcache_functions[] = {
PHP_FE(memcache_connect, NULL)
PHP_FE(memcache_pconnect, NULL)
PHP_FE(memcache_add_server, NULL)
PHP_FE(memcache_set_server_params, NULL)
PHP_FE(memcache_get_server_status, NULL)
PHP_FE(memcache_get_version, NULL)
PHP_FE(memcache_add, NULL)
PHP_FE(memcache_set, NULL)
PHP_FE(memcache_replace, NULL)
PHP_FE(memcache_get, NULL)
PHP_FE(memcache_delete, NULL)
PHP_FE(memcache_debug, NULL)
PHP_FE(memcache_get_stats, NULL)
PHP_FE(memcache_get_extended_stats, NULL)
PHP_FE(memcache_set_compress_threshold, NULL)
PHP_FE(memcache_increment, NULL)
PHP_FE(memcache_decrement, NULL)
PHP_FE(memcache_close, NULL)
PHP_FE(memcache_flush, NULL)
PHP_FE(memcache_setoptimeout, NULL)
{NULL, NULL, NULL}
};
static zend_function_entry php_memcache_class_functions[] = {
PHP_FALIAS(connect, memcache_connect, NULL)
PHP_FALIAS(pconnect, memcache_pconnect, NULL)
PHP_FALIAS(addserver, memcache_add_server, NULL)
PHP_FALIAS(setserverparams, memcache_set_server_params, NULL)
PHP_FALIAS(getserverstatus, memcache_get_server_status, NULL)
PHP_FALIAS(getversion, memcache_get_version, NULL)
PHP_FALIAS(add, memcache_add, NULL)
PHP_FALIAS(set, memcache_set, NULL)
PHP_FALIAS(replace, memcache_replace, NULL)
PHP_FALIAS(get, memcache_get, NULL)
PHP_FALIAS(delete, memcache_delete, NULL)
PHP_FALIAS(getstats, memcache_get_stats, NULL)
PHP_FALIAS(getextendedstats, memcache_get_extended_stats, NULL)
PHP_FALIAS(setcompressthreshold, memcache_set_compress_threshold, NULL)
PHP_FALIAS(increment, memcache_increment, NULL)
PHP_FALIAS(decrement, memcache_decrement, NULL)
PHP_FALIAS(close, memcache_close, NULL)
PHP_FALIAS(flush, memcache_flush, NULL)
PHP_FALIAS(setoptimeout, memcache_setoptimeout, NULL)
{NULL, NULL, NULL}
};
/* }}} */
/* {{{ memcache_module_entry
*/
zend_module_entry memcache_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"memcache",
memcache_functions,
PHP_MINIT(memcache),
PHP_MSHUTDOWN(memcache),
PHP_RINIT(memcache),
NULL,
PHP_MINFO(memcache),
#if ZEND_MODULE_API_NO >= 20010901
PHP_MEMCACHE_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_MEMCACHE
ZEND_GET_MODULE(memcache)
#endif
static PHP_INI_MH(OnUpdateChunkSize) /* {{{ */
{
long int lval;
lval = strtol(new_value, NULL, 10);
if (lval <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "memcache.chunk_size must be a positive integer ('%s' given)", new_value);
return FAILURE;
}
return OnUpdateLong(entry, new_value, new_value_length, mh_arg1, mh_arg2, mh_arg3, stage TSRMLS_CC);
}
/* }}} */
static PHP_INI_MH(OnUpdateFailoverAttempts) /* {{{ */
{
long int lval;
lval = strtol(new_value, NULL, 10);
if (lval <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "memcache.max_failover_attempts must be a positive integer ('%s' given)", new_value);
return FAILURE;
}
return OnUpdateLong(entry, new_value, new_value_length, mh_arg1, mh_arg2, mh_arg3, stage TSRMLS_CC);
}
/* }}} */
static PHP_INI_MH(OnUpdateHashStrategy) /* {{{ */
{
if (!strcasecmp(new_value, "standard")) {
MEMCACHE_G(hash_strategy) = MMC_STANDARD_HASH;
}
else if (!strcasecmp(new_value, "consistent")) {
MEMCACHE_G(hash_strategy) = MMC_CONSISTENT_HASH;
}
else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "memcache.hash_strategy must be in set {standard, consistent} ('%s' given)", new_value);
return FAILURE;
}
return SUCCESS;
}
/* }}} */
static PHP_INI_MH(OnUpdateHashFunction) /* {{{ */
{
if (!strcasecmp(new_value, "crc32")) {
MEMCACHE_G(hash_function) = MMC_HASH_CRC32;
}
else if (!strcasecmp(new_value, "fnv")) {
MEMCACHE_G(hash_function) = MMC_HASH_FNV1A;
}
else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "memcache.hash_function must be in set {crc32, fnv} ('%s' given)", new_value);
return FAILURE;
}
return SUCCESS;
}
/* }}} */
static PHP_INI_MH(OnUpdateDefaultTimeout) /* {{{ */
{
long int lval;
lval = strtol(new_value, NULL, 10);
if (lval <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "memcache.default_timeout must be a positive number greater than or equal to 1 ('%s' given)", new_value);
return FAILURE;
}
MEMCACHE_G(default_timeout_ms) = lval;
return SUCCESS;
}
/* }}} */
/* {{{ PHP_INI */
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("memcache.allow_failover", "1", PHP_INI_ALL, OnUpdateLong, allow_failover, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.max_failover_attempts", "20", PHP_INI_ALL, OnUpdateFailoverAttempts, max_failover_attempts, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.default_port", "11211", PHP_INI_ALL, OnUpdateLong, default_port, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.chunk_size", "8192", PHP_INI_ALL, OnUpdateChunkSize, chunk_size, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.hash_strategy", "standard", PHP_INI_ALL, OnUpdateHashStrategy, hash_strategy, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.hash_function", "crc32", PHP_INI_ALL, OnUpdateHashFunction, hash_function, zend_memcache_globals, memcache_globals)
STD_PHP_INI_ENTRY("memcache.default_timeout_ms", "1000", PHP_INI_ALL, OnUpdateDefaultTimeout, default_timeout_ms, zend_memcache_globals, memcache_globals)
PHP_INI_END()
/* }}} */
/* {{{ internal function protos */
static void _mmc_pool_list_dtor(zend_rsrc_list_entry * TSRMLS_DC);
static void _mmc_pserver_list_dtor(zend_rsrc_list_entry * TSRMLS_DC);
static void mmc_server_free(mmc_t * TSRMLS_DC);
static void mmc_server_disconnect(mmc_t * TSRMLS_DC);
static int mmc_server_store(mmc_t *, const char *, int TSRMLS_DC);
static int mmc_compress(char **, unsigned long *, const char *, int TSRMLS_DC);
static int mmc_uncompress(char **, unsigned long *, const char *, int);
static int mmc_get_pool(zval *, mmc_pool_t ** TSRMLS_DC);
static int mmc_readline(mmc_t * TSRMLS_DC);
static char * mmc_get_version(mmc_t * TSRMLS_DC);
static int mmc_str_left(char *, char *, int, int);
static int mmc_sendcmd(mmc_t *, const char *, int TSRMLS_DC);
static int mmc_parse_response(mmc_t *mmc, char *, int, char **, int *, int *, int *);
static int mmc_exec_retrieval_cmd_multi(mmc_pool_t *, zval *, zval **, zval * TSRMLS_DC);
static int mmc_read_value(mmc_t *, char **, int *, char **, int *, int * TSRMLS_DC);
static int mmc_flush(mmc_t *, int TSRMLS_DC);
static void php_mmc_store(INTERNAL_FUNCTION_PARAMETERS, char *, int);
static int mmc_get_stats(mmc_t *, char *, int, int, zval * TSRMLS_DC);
static int mmc_incr_decr(mmc_t *, int, char *, int, int, long * TSRMLS_DC);
static void php_mmc_incr_decr(INTERNAL_FUNCTION_PARAMETERS, int);
static void php_mmc_connect(INTERNAL_FUNCTION_PARAMETERS, int);
/* }}} */
/* {{{ hash strategies */
extern mmc_hash_t mmc_standard_hash;
extern mmc_hash_t mmc_consistent_hash;
/* }}} */
/* {{{ php_memcache_init_globals()
*/
static void php_memcache_init_globals(zend_memcache_globals *memcache_globals_p TSRMLS_DC)
{
MEMCACHE_G(debug_mode) = 0;
MEMCACHE_G(num_persistent) = 0;
MEMCACHE_G(compression_level) = Z_DEFAULT_COMPRESSION;
MEMCACHE_G(hash_strategy) = MMC_STANDARD_HASH;
MEMCACHE_G(hash_function) = MMC_HASH_CRC32;
MEMCACHE_G(default_timeout_ms)= (MMC_DEFAULT_TIMEOUT) * 1000;
}
/* }}} */
/* {{{ PHP_MINIT_FUNCTION
*/
PHP_MINIT_FUNCTION(memcache)
{
zend_class_entry memcache_class_entry;
INIT_CLASS_ENTRY(memcache_class_entry, "Memcache", php_memcache_class_functions);
memcache_class_entry_ptr = zend_register_internal_class(&memcache_class_entry TSRMLS_CC);
le_memcache_pool = zend_register_list_destructors_ex(_mmc_pool_list_dtor, NULL, "memcache connection", module_number);
le_pmemcache = zend_register_list_destructors_ex(NULL, _mmc_pserver_list_dtor, "persistent memcache connection", module_number);
#ifdef ZTS
ts_allocate_id(&memcache_globals_id, sizeof(zend_memcache_globals), (ts_allocate_ctor) php_memcache_init_globals, NULL);
#else
php_memcache_init_globals(&memcache_globals TSRMLS_CC);
#endif
REGISTER_LONG_CONSTANT("MEMCACHE_COMPRESSED", MMC_COMPRESSED, CONST_CS | CONST_PERSISTENT);
REGISTER_INI_ENTRIES();
#if HAVE_MEMCACHE_SESSION
REGISTER_LONG_CONSTANT("MEMCACHE_HAVE_SESSION", 1, CONST_CS | CONST_PERSISTENT);
php_session_register_module(ps_memcache_ptr);
#else
REGISTER_LONG_CONSTANT("MEMCACHE_HAVE_SESSION", 0, CONST_CS | CONST_PERSISTENT);
#endif
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION
*/
PHP_MSHUTDOWN_FUNCTION(memcache)
{
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_RINIT_FUNCTION
*/
PHP_RINIT_FUNCTION(memcache)
{
MEMCACHE_G(debug_mode) = 0;
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(memcache)
{
char buf[MAX_LENGTH_OF_LONG + 1];
sprintf(buf, "%ld", MEMCACHE_G(num_persistent));
php_info_print_table_start();
php_info_print_table_header(2, "memcache support", "enabled");
php_info_print_table_row(2, "Active persistent connections", buf);
php_info_print_table_row(2, "Version", PHP_MEMCACHE_VERSION);
php_info_print_table_row(2, "Revision", "$Revision$");
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
/* ------------------
internal functions
------------------ */
#if ZEND_DEBUG
void mmc_debug(const char *format, ...) /* {{{ */
{
TSRMLS_FETCH();
if (MEMCACHE_G(debug_mode)) {
char buffer[1024];
va_list args;
va_start(args, format);
vsnprintf(buffer, sizeof(buffer)-1, format, args);
va_end(args);
buffer[sizeof(buffer)-1] = '\0';
php_printf("%s<br />\n", buffer);
}
}
/* }}} */
#endif
static struct timeval _convert_timeoutms_to_ts(long msecs) /* {{{ */
{
struct timeval tv;
int secs = 0;
secs = msecs / 1000;
tv.tv_sec = secs;
tv.tv_usec = ((msecs - (secs * 1000)) * 1000) % 1000000;
return tv;
}
/* }}} */
static void _mmc_pool_list_dtor(zend_rsrc_list_entry *rsrc TSRMLS_DC) /* {{{ */
{
mmc_pool_free((mmc_pool_t *)rsrc->ptr TSRMLS_CC);
}
/* }}} */
static void _mmc_pserver_list_dtor(zend_rsrc_list_entry *rsrc TSRMLS_DC) /* {{{ */
{
mmc_server_free((mmc_t *)rsrc->ptr TSRMLS_CC);
}
/* }}} */
mmc_t *mmc_server_new(char *host, int host_len, unsigned short port, int persistent, int timeout, int retry_interval TSRMLS_DC) /* {{{ */
{
mmc_t *mmc = pemalloc(sizeof(mmc_t), persistent);
memset(mmc, 0, sizeof(*mmc));
mmc->host = pemalloc(host_len + 1, persistent);
memcpy(mmc->host, host, host_len);
mmc->host[host_len] = '\0';
mmc->port = port;
mmc->status = MMC_STATUS_DISCONNECTED;
mmc->persistent = persistent;
if (persistent) {
MEMCACHE_G(num_persistent)++;
}
mmc->timeout = timeout;
mmc->retry_interval = retry_interval;
return mmc;
}
/* }}} */
static void mmc_server_callback_dtor(zval **callback TSRMLS_DC) /* {{{ */
{
zval **this_obj;
if (!callback || !*callback) return;
if (Z_TYPE_PP(callback) == IS_ARRAY &&
zend_hash_index_find(Z_ARRVAL_PP(callback), 0, (void **)&this_obj) == SUCCESS &&
Z_TYPE_PP(this_obj) == IS_OBJECT) {
zval_ptr_dtor(this_obj);
}
zval_ptr_dtor(callback);
}
/* }}} */
static void mmc_server_callback_ctor(zval **callback TSRMLS_DC) /* {{{ */
{
zval **this_obj;
if (!callback || !*callback) return;
if (Z_TYPE_PP(callback) == IS_ARRAY &&
zend_hash_index_find(Z_ARRVAL_PP(callback), 0, (void **)&this_obj) == SUCCESS &&
Z_TYPE_PP(this_obj) == IS_OBJECT) {
zval_add_ref(this_obj);
}
zval_add_ref(callback);
}
/* }}} */
static void mmc_server_sleep(mmc_t *mmc TSRMLS_DC) /*
prepare server struct for persistent sleep {{{ */
{
mmc_server_callback_dtor(&mmc->failure_callback TSRMLS_CC);
mmc->failure_callback = NULL;
if (mmc->error != NULL) {
pefree(mmc->error, mmc->persistent);
mmc->error = NULL;
}
}
/* }}} */
static void mmc_server_free(mmc_t *mmc TSRMLS_DC) /* {{{ */
{
if (mmc->in_free) {
php_error_docref(NULL TSRMLS_CC, E_ERROR, "Recursive reference detected, bailing out");
return;
}
mmc->in_free = 1;
mmc_server_sleep(mmc TSRMLS_CC);
if (mmc->persistent) {
free(mmc->host);
free(mmc);
MEMCACHE_G(num_persistent)--;
}
else {
if (mmc->stream != NULL) {
php_stream_close(mmc->stream);
}
efree(mmc->host);
efree(mmc);
}
}
/* }}} */
static void mmc_server_seterror(mmc_t *mmc, const char *error, int errnum) /* {{{ */
{
if (error != NULL) {
if (mmc->error != NULL) {
pefree(mmc->error, mmc->persistent);
}
mmc->error = pestrdup(error, mmc->persistent);
mmc->errnum = errnum;
}
}
/* }}} */
static void mmc_server_received_error(mmc_t *mmc, int response_len) /* {{{ */
{
if (mmc_str_left(mmc->inbuf, "ERROR", response_len, sizeof("ERROR") - 1) ||
mmc_str_left(mmc->inbuf, "CLIENT_ERROR", response_len, sizeof("CLIENT_ERROR") - 1) ||
mmc_str_left(mmc->inbuf, "SERVER_ERROR", response_len, sizeof("SERVER_ERROR") - 1))
{
mmc->inbuf[response_len < MMC_BUF_SIZE - 1 ? response_len : MMC_BUF_SIZE - 1] = '\0';
mmc_server_seterror(mmc, mmc->inbuf, 0);
}
else {
mmc_server_seterror(mmc, "Received malformed response", 0);
}
}
/* }}} */
int mmc_server_failure(mmc_t *mmc TSRMLS_DC) /*determines if a request should be retried or is a hard network failure {{{ */
{
switch (mmc->status) {
case MMC_STATUS_DISCONNECTED:
return 0;
/* attempt reconnect of sockets in unknown state */
case MMC_STATUS_UNKNOWN:
mmc->status = MMC_STATUS_DISCONNECTED;
return 0;
}
mmc_server_deactivate(mmc TSRMLS_CC);
return 1;
}
/* }}} */
static int mmc_server_store(mmc_t *mmc, const char *request, int request_len TSRMLS_DC) /* {{{ */
{
int response_len;
php_netstream_data_t *sock = (php_netstream_data_t*)mmc->stream->abstract;
if (mmc->timeoutms > 1) {
sock->timeout = _convert_timeoutms_to_ts(mmc->timeoutms);
}
if (php_stream_write(mmc->stream, request, request_len) != request_len) {
mmc_server_seterror(mmc, "Failed sending command and value to stream", 0);
return -1;
}
if ((response_len = mmc_readline(mmc TSRMLS_CC)) < 0) {
return -1;
}
if(mmc_str_left(mmc->inbuf, "STORED", response_len, sizeof("STORED") - 1)) {
return 1;
}
/* return FALSE */
if(mmc_str_left(mmc->inbuf, "NOT_STORED", response_len, sizeof("NOT_STORED") - 1)) {
return 0;
}
/* return FALSE without failover */
if (mmc_str_left(mmc->inbuf, "SERVER_ERROR out of memory", response_len, sizeof("SERVER_ERROR out of memory") - 1) ||
mmc_str_left(mmc->inbuf, "SERVER_ERROR object too large", response_len, sizeof("SERVER_ERROR object too large")-1)) {
return 0;
}
mmc_server_received_error(mmc, response_len);
return -1;
}
/* }}} */
int mmc_prepare_key_ex(const char *key, unsigned int key_len, char *result, unsigned int *result_len TSRMLS_DC) /* {{{ */
{
unsigned int i;
if (key_len == 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Key cannot be empty");
return MMC_REQUEST_FAILURE;
}
*result_len = key_len < MMC_KEY_MAX_SIZE ? key_len : MMC_KEY_MAX_SIZE;
result[*result_len] = '\0';
for (i=0; i<*result_len; i++) {
result[i] = ((unsigned char)key[i]) > ' ' ? key[i] : '_';
}
return MMC_OK;
}
/* }}} */
int mmc_prepare_key(zval *key, char *result, unsigned int *result_len TSRMLS_DC) /* {{{ */
{
if (Z_TYPE_P(key) == IS_STRING) {
return mmc_prepare_key_ex(Z_STRVAL_P(key), Z_STRLEN_P(key), result, result_len TSRMLS_CC);
} else {
int res;
zval *keytmp;
ALLOC_ZVAL(keytmp);
*keytmp = *key;
zval_copy_ctor(keytmp);
convert_to_string(keytmp);
res = mmc_prepare_key_ex(Z_STRVAL_P(keytmp), Z_STRLEN_P(keytmp), result, result_len TSRMLS_CC);
zval_dtor(keytmp);
FREE_ZVAL(keytmp);
return res;
}
}
/* }}} */
static unsigned int mmc_hash_crc32(const char *key, int key_len) /* CRC32 hash {{{ */
{
unsigned int crc = ~0;
int i;
for (i=0; i<key_len; i++) {
CRC32(crc, key[i]);
}
return ~crc;
}
/* }}} */
static unsigned int mmc_hash_fnv1a(const char *key, int key_len) /* FNV-1a hash {{{ */
{
unsigned int hval = FNV_32_INIT;
int i;
for (i=0; i<key_len; i++) {
hval ^= (unsigned int)key[i];
hval *= FNV_32_PRIME;
}
return hval;
}
/* }}} */
static void mmc_pool_init_hash(mmc_pool_t *pool TSRMLS_DC) /* {{{ */
{
mmc_hash_function hash;
switch (MEMCACHE_G(hash_strategy)) {
case MMC_CONSISTENT_HASH:
pool->hash = &mmc_consistent_hash;
break;
default:
pool->hash = &mmc_standard_hash;
}
switch (MEMCACHE_G(hash_function)) {
case MMC_HASH_FNV1A:
hash = &mmc_hash_fnv1a;
break;
default:
hash = &mmc_hash_crc32;
}
pool->hash_state = pool->hash->create_state(hash);
}
/* }}} */
mmc_pool_t *mmc_pool_new(TSRMLS_D) /* {{{ */
{
mmc_pool_t *pool = emalloc(sizeof(mmc_pool_t));
pool->num_servers = 0;
pool->compress_threshold = 0;
pool->in_free = 0;
pool->min_compress_savings = MMC_DEFAULT_SAVINGS;
mmc_pool_init_hash(pool TSRMLS_CC);
return pool;
}
/* }}} */
void mmc_pool_free(mmc_pool_t *pool TSRMLS_DC) /* {{{ */
{
int i;
if (pool->in_free) {
php_error_docref(NULL TSRMLS_CC, E_ERROR, "Recursive reference detected, bailing out");
return;
}
pool->in_free = 1;
for (i=0; i<pool->num_servers; i++) {
if (!pool->servers[i]) {
continue;
}
if (pool->servers[i]->persistent == 0 && pool->servers[i]->host != NULL) {
mmc_server_free(pool->servers[i] TSRMLS_CC);
} else {
mmc_server_sleep(pool->servers[i] TSRMLS_CC);
}
pool->servers[i] = NULL;
}
if (pool->num_servers) {
efree(pool->servers);
efree(pool->requests);
}
pool->hash->free_state(pool->hash_state);
efree(pool);
}
/* }}} */
void mmc_pool_add(mmc_pool_t *pool, mmc_t *mmc, unsigned int weight) /* {{{ */
{
/* add server and a preallocated request pointer */
if (pool->num_servers) {
pool->servers = erealloc(pool->servers, sizeof(mmc_t *) * (pool->num_servers + 1));
pool->requests = erealloc(pool->requests, sizeof(mmc_t *) * (pool->num_servers + 1));
}
else {
pool->servers = emalloc(sizeof(mmc_t *));
pool->requests = emalloc(sizeof(mmc_t *));
}
pool->servers[pool->num_servers] = mmc;
pool->num_servers++;
pool->hash->add_server(pool->hash_state, mmc, weight);
}
/* }}} */
static int mmc_pool_close(mmc_pool_t *pool TSRMLS_DC) /* disconnects and removes all servers in the pool {{{ */
{
if (pool->num_servers) {
int i;
for (i=0; i<pool->num_servers; i++) {
if (pool->servers[i]->persistent == 0 && pool->servers[i]->host != NULL) {
mmc_server_free(pool->servers[i] TSRMLS_CC);
} else {
mmc_server_sleep(pool->servers[i] TSRMLS_CC);
}
}
efree(pool->servers);
pool->servers = NULL;
pool->num_servers = 0;
efree(pool->requests);
pool->requests = NULL;
/* reallocate the hash strategy state */
pool->hash->free_state(pool->hash_state);
mmc_pool_init_hash(pool TSRMLS_CC);
}
return 1;
}
/* }}} */
int mmc_pool_store(mmc_pool_t *pool, const char *command, int command_len, const char *key, int key_len, int flags, int expire, const char *value, int value_len TSRMLS_DC) /* {{{ */
{
mmc_t *mmc;
char *request;
int request_len, result = -1;
char *key_copy = NULL, *data = NULL;
if (key_len > MMC_KEY_MAX_SIZE) {
key = key_copy = estrndup(key, MMC_KEY_MAX_SIZE);
key_len = MMC_KEY_MAX_SIZE;
}
/* autocompress large values */
if (pool->compress_threshold && value_len >= pool->compress_threshold) {
flags |= MMC_COMPRESSED;
}
if (flags & MMC_COMPRESSED) {
unsigned long data_len;
if (!mmc_compress(&data, &data_len, value, value_len TSRMLS_CC)) {
/* mmc_server_seterror(mmc, "Failed to compress data", 0); */
return -1;
}
/* was enough space saved to motivate uncompress processing on get */
if (data_len < value_len * (1 - pool->min_compress_savings)) {
value = data;
value_len = data_len;
}
else {
flags &= ~MMC_COMPRESSED;
efree(data);
data = NULL;
}
}
request = emalloc(
command_len
+ 1 /* space */
+ key_len
+ 1 /* space */
+ MAX_LENGTH_OF_LONG
+ 1 /* space */
+ MAX_LENGTH_OF_LONG
+ 1 /* space */
+ MAX_LENGTH_OF_LONG
+ sizeof("\r\n") - 1
+ value_len
+ sizeof("\r\n") - 1
+ 1
);
request_len = sprintf(request, "%s %s %d %d %d\r\n", command, key, flags, expire, value_len);
memcpy(request + request_len, value, value_len);
request_len += value_len;
memcpy(request + request_len, "\r\n", sizeof("\r\n") - 1);
request_len += sizeof("\r\n") - 1;
request[request_len] = '\0';
while (result < 0 && (mmc = mmc_pool_find(pool, key, key_len TSRMLS_CC)) != NULL) {
if ((result = mmc_server_store(mmc, request, request_len TSRMLS_CC)) < 0) {
mmc_server_failure(mmc TSRMLS_CC);
}
}
if (key_copy != NULL) {
efree(key_copy);
}
if (data != NULL) {
efree(data);
}
efree(request);
return result;
}
/* }}} */
static int mmc_compress(char **result, unsigned long *result_len, const char *data, int data_len TSRMLS_DC) /* {{{ */
{
int status, level = MEMCACHE_G(compression_level);
*result_len = data_len + (data_len / 1000) + 25 + 1; /* some magic from zlib.c */
*result = (char *) emalloc(*result_len);
if (!*result) {
return 0;
}
if (level >= 0) {
status = compress2((unsigned char *) *result, result_len, (unsigned const char *) data, data_len, level);
} else {
status = compress((unsigned char *) *result, result_len, (unsigned const char *) data, data_len);
}
if (status == Z_OK) {
*result = erealloc(*result, *result_len + 1);
(*result)[*result_len] = '\0';
return 1;
}
switch (status) {
case Z_MEM_ERROR:
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Not enough memory to perform compression");
break;
case Z_BUF_ERROR:
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Not enough room in the output buffer to perform compression");
break;
case Z_STREAM_ERROR:
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid compression level");
break;
default:
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unknown error during compression");
break;
}
efree(*result);
return 0;
}
/* }}}*/
static int mmc_uncompress(char **result, unsigned long *result_len, const char *data, int data_len) /* {{{ */
{
int status;
unsigned int factor = 1, maxfactor = 16;
char *tmp1 = NULL;
do {
*result_len = (unsigned long)data_len * (1 << factor++);
*result = (char *) erealloc(tmp1, *result_len);
status = uncompress((unsigned char *) *result, result_len, (unsigned const char *) data, data_len);
tmp1 = *result;
} while (status == Z_BUF_ERROR && factor < maxfactor);
if (status == Z_OK) {
*result = erealloc(*result, *result_len + 1);
(*result)[*result_len] = '\0';
return 1;
}
efree(*result);
return 0;
}
/* }}}*/
static int mmc_get_pool(zval *id, mmc_pool_t **pool TSRMLS_DC) /* {{{ */
{
zval **connection;
int resource_type;
if (Z_TYPE_P(id) != IS_OBJECT || zend_hash_find(Z_OBJPROP_P(id), "connection", sizeof("connection"), (void **) &connection) == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "No servers added to memcache connection");
return 0;
}
*pool = (mmc_pool_t *) zend_list_find(Z_LVAL_PP(connection), &resource_type);
if (!*pool || resource_type != le_memcache_pool) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid Memcache->connection member variable");
return 0;
}
return Z_LVAL_PP(connection);
}
/* }}} */
static int _mmc_open(mmc_t *mmc, char **error_string, int *errnum TSRMLS_DC) /* {{{ */
{
struct timeval tv;
char *hostname = NULL, *hash_key = NULL, *errstr = NULL;
int hostname_len, err = 0;
/* close open stream */
if (mmc->stream != NULL) {
mmc_server_disconnect(mmc TSRMLS_CC);
}
if (mmc->connect_timeoutms > 0) {
tv = _convert_timeoutms_to_ts(mmc->connect_timeoutms);
} else {
tv.tv_sec = mmc->timeout;
tv.tv_usec = 0;
}
if (mmc->port) {
hostname_len = spprintf(&hostname, 0, "%s:%d", mmc->host, mmc->port);
}
else {
hostname_len = spprintf(&hostname, 0, "%s", mmc->host);
}
if (mmc->persistent) {
spprintf(&hash_key, 0, "memcache:%s", hostname);
}
#if PHP_API_VERSION > 20020918
mmc->stream = php_stream_xport_create( hostname, hostname_len,
ENFORCE_SAFE_MODE | REPORT_ERRORS,
STREAM_XPORT_CLIENT | STREAM_XPORT_CONNECT,
hash_key, &tv, NULL, &errstr, &err);
#else
if (mmc->persistent) {
switch(php_stream_from_persistent_id(hash_key, &(mmc->stream) TSRMLS_CC)) {
case PHP_STREAM_PERSISTENT_SUCCESS:
if (php_stream_eof(mmc->stream)) {
php_stream_pclose(mmc->stream);
mmc->stream = NULL;
break;
}
case PHP_STREAM_PERSISTENT_FAILURE:
break;
}
}
if (!mmc->stream) {
int socktype = SOCK_STREAM;
mmc->stream = php_stream_sock_open_host(mmc->host, mmc->port, socktype, &tv, hash_key);
}
#endif
efree(hostname);
if (mmc->persistent) {
efree(hash_key);
}
if (!mmc->stream) {
MMC_DEBUG(("_mmc_open: can't open socket to host"));
mmc_server_seterror(mmc, errstr != NULL ? errstr : "Connection failed", err);
mmc_server_deactivate(mmc TSRMLS_CC);
if (errstr) {
if (error_string) {
*error_string = errstr;
}
else {
efree(errstr);
}
}
if (errnum) {
*errnum = err;
}
return 0;
}
php_stream_auto_cleanup(mmc->stream);
php_stream_set_option(mmc->stream, PHP_STREAM_OPTION_READ_TIMEOUT, 0, &tv);
php_stream_set_option(mmc->stream, PHP_STREAM_OPTION_WRITE_BUFFER, PHP_STREAM_BUFFER_NONE, NULL);
php_stream_set_chunk_size(mmc->stream, MEMCACHE_G(chunk_size));
mmc->status = MMC_STATUS_CONNECTED;