mirrored from git://git.rockbox.org/rockbox.git
-
Notifications
You must be signed in to change notification settings - Fork 159
/
tagcache.c
5182 lines (4319 loc) · 140 KB
/
tagcache.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
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Miika Pekkarinen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* TagCache API
*
* ----------x---------x------------------x-----
* | | | External
* +---------------x-------+ | TagCache | Libraries
* | Modification routines | | Core |
* +-x---------x-----------+ | |
* | (R/W) | | | |
* | +------x-------------x-+ +-------------x-----+ |
* | | x==x Filters & clauses | |
* | | Search routines | +-------------------+ |
* | | x============================x DirCache
* | +-x--------------------+ | (optional)
* | | (R) |
* | | +-------------------------------+ +---------+ |
* | | | DB Commit (sort,unique,index) | | | |
* | | +-x--------------------------x--+ | Control | |
* | | | (R/W) | (R) | Thread | |
* | | | +----------------------+ | | | |
* | | | | TagCache DB Builder | | +---------+ |
* | | | +-x-------------x------+ | |
* | | | | (R) | (W) | |
* | | | | +--x--------x---------+ |
* | | | | | Temporary Commit DB | |
* | | | | +---------------------+ |
* +-x----x-------x--+ |
* | TagCache RAM DB x==\(W) +-----------------+ |
* +-----------------+ \===x | |
* | | | | (R) | Ram DB Loader x============x DirCache
* +-x----x---x---x---+ /==x | | (optional)
* | Tagcache Disk DB x==/ +-----------------+ |
* +------------------+ |
*
*/
/*#define LOGF_ENABLE*/
/*#define LOGF_CLAUSES define to enable logf clause matching (LOGF_ENABLE req'd) */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#ifdef APPLICATION
#include <unistd.h> /* readlink() */
#include <limits.h> /* PATH_MAX */
#endif
#include "config.h"
#include "ata_idle_notify.h"
#include "thread.h"
#include "kernel.h"
#include "system.h"
#include "logf.h"
#include "string-extra.h"
#include "usb.h"
#include "metadata.h"
#include "tagcache.h"
#include "core_alloc.h"
#include "crc32.h"
#include "misc.h"
#include "settings.h"
#include "dir.h"
#include "pathfuncs.h"
#include "structec.h"
#include "debug.h"
#include "dircache.h"
#include "errno.h"
#ifndef __PCTOOL__
#include "lang.h"
#include "eeprom_settings.h"
#endif
/* Maximum length of a single tag. */
#define TAG_MAXLEN (MAX_PATH*2)
/* Allow a little drift to the filename ordering (should not be too high/low). */
#define POS_HISTORY_COUNT 4
/* How much to pre-load entries while committing to prevent seeking. */
#define IDX_BUF_DEPTH 64
/* Tag Cache Header version 'TCHxx'. Increment when changing internal structures. */
#define TAGCACHE_MAGIC 0x54434810
/* Dump store/restore header version 'TCSxx'. */
#define TAGCACHE_STATEFILE_MAGIC 0x54435301
/* How much to allocate extra space for ramcache. */
#define TAGCACHE_RESERVE 32768
/*
* Define how long one entry must be at least (longer -> less memory at commit).
* Must be at least 4 bytes in length for correct alignment.
*/
#define TAGFILE_ENTRY_CHUNK_LENGTH 8
/* Used to guess the necessary buffer size at commit. */
#define TAGFILE_ENTRY_AVG_LENGTH 16
/* Max events in the internal tagcache command queue. */
#define TAGCACHE_COMMAND_QUEUE_LENGTH 32
/* Idle time before committing events in the command queue. */
#define TAGCACHE_COMMAND_QUEUE_COMMIT_DELAY HZ*2
/* Temporary database containing new tags to be committed to the main db. */
#define TAGCACHE_FILE_TEMP "database_tmp.tcd"
/* The main database master index and numeric data. */
#define TAGCACHE_FILE_MASTER "database_idx.tcd"
/* The main database string data. */
#define TAGCACHE_FILE_INDEX "database_%d.tcd"
/* ASCII dumpfile of the DB contents. */
#define TAGCACHE_FILE_CHANGELOG "database_changelog.txt"
/* Serialized DB. */
#define TAGCACHE_STATEFILE "database_state.tcd"
/* Flags */
#define FLAG_DELETED 0x0001 /* Entry has been removed from db */
#define FLAG_DIRCACHE 0x0002 /* Filename is a dircache pointer */
#define FLAG_DIRTYNUM 0x0004 /* Numeric data has been modified */
#define FLAG_TRKNUMGEN 0x0008 /* Track number has been generated */
#define FLAG_RESURRECTED 0x0010 /* Statistics data has been resurrected */
#ifdef __PCTOOL__
#define yield() do { } while(0)
#define sim_sleep(timeout) do { } while(0)
#define do_timed_yield() do { } while(0)
#endif
#ifndef __PCTOOL__
/* Tag Cache thread. */
static struct event_queue tagcache_queue SHAREDBSS_ATTR;
static long tagcache_stack[(DEFAULT_STACK_SIZE + 0x4000)/sizeof(long)];
static const char tagcache_thread_name[] = "tagcache";
#endif
/* buffer size for all the (stack allocated & static) buffers handling tc data */
#define TAGCACHE_BUFSZ (TAG_MAXLEN+32)
/* Previous path when scanning directory tree recursively. */
static char curpath[TAGCACHE_BUFSZ];
/* Used when removing duplicates. */
static char *tempbuf; /* Allocated when needed. */
static long tempbufidx; /* Current location in buffer. */
static size_t tempbuf_size; /* Buffer size (TEMPBUF_SIZE). */
static long tempbuf_left; /* Buffer space left. */
static long tempbuf_pos;
#ifndef __PCTOOL__
static int tempbuf_handle;
#endif
#define SORTED_TAGS_COUNT 9
#define TAGCACHE_IS_UNIQUE(tag) (BIT_N(tag) & TAGCACHE_UNIQUE_TAGS)
#define TAGCACHE_IS_SORTED(tag) (BIT_N(tag) & TAGCACHE_SORTED_TAGS)
#define TAGCACHE_IS_NUMERIC_OR_NONUNIQUE(tag) \
(BIT_N(tag) & (TAGCACHE_NUMERIC_TAGS | ~TAGCACHE_UNIQUE_TAGS))
/* Tags we want to get sorted (loaded to the tempbuf). */
#define TAGCACHE_SORTED_TAGS ((1LU << tag_artist) | (1LU << tag_album) | \
(1LU << tag_genre) | (1LU << tag_composer) | (1LU << tag_comment) | \
(1LU << tag_albumartist) | (1LU << tag_grouping) | (1LU << tag_title) | \
(1LU << tag_virt_canonicalartist))
/* Uniqued tags (we can use these tags with filters and conditional clauses). */
#define TAGCACHE_UNIQUE_TAGS ((1LU << tag_artist) | (1LU << tag_album) | \
(1LU << tag_genre) | (1LU << tag_composer) | (1LU << tag_comment) | \
(1LU << tag_albumartist) | (1LU << tag_grouping) | \
(1LU << tag_virt_canonicalartist))
/* String presentation of the tags defined in tagcache.h. Must be in correct order! */
static const char * const tags_str[] = { "artist", "album", "genre", "title",
"filename", "composer", "comment", "albumartist", "grouping", "year",
"discnumber", "tracknumber", "canonicalartist", "bitrate", "length",
"playcount", "rating", "playtime", "lastplayed", "commitid", "mtime",
"lastelapsed", "lastoffset"
#if !defined(LOGF_ENABLE)
};
#define logf_clauses(...) do { } while(0)
#elif defined(LOGF_CLAUSES) /* strings for logf debugging */
"tag_virt_basename", "tag_virt_length_min", "tag_virt_length_sec",
"tag_virt_playtime_min", "tag_virt_playtime_sec",
"tag_virt_entryage", "tag_virt_autoscore"
};
/* more debug strings */
static const char * const tag_type_str[] = {
[clause_none] = "clause_none", [clause_is] = "clause_is",
[clause_is_not] = "clause_is_not", [clause_gt] = "clause_gt",
[clause_gteq] = "clause_gteq", [clause_lt] = "clause_lt",
[clause_lteq] = "clause_lteq", [clause_contains] = "clause_contains",
[clause_not_contains] = "clause_not_contains",
[clause_begins_with] = "clause_begins_with",
[clause_not_begins_with] = "clause_not_begins_with",
[clause_ends_with] = "clause_ends_with",
[clause_not_ends_with] = "clause_not_ends_with",
[clause_oneof] = "clause_oneof",
[clause_begins_oneof] = "clause_begins_oneof",
[clause_ends_oneof] = "clause_ends_oneof",
[clause_logical_or] = "clause_logical_or"
};
#define logf_clauses logf
#endif /* ndef LOGF_ENABLE */
/* Status information of the tagcache. */
static struct tagcache_stat tc_stat;
/* Queue commands. */
enum tagcache_queue {
Q_STOP_SCAN = 0,
Q_START_SCAN,
Q_IMPORT_CHANGELOG,
Q_UPDATE,
Q_REBUILD,
/* Internal tagcache command queue. */
CMD_UPDATE_MASTER_HEADER,
CMD_UPDATE_NUMERIC,
};
struct tagcache_command_entry {
int32_t command;
int32_t idx_id;
int32_t tag;
int32_t data;
};
#ifndef __PCTOOL__
static struct tagcache_command_entry command_queue[TAGCACHE_COMMAND_QUEUE_LENGTH];
static volatile int command_queue_widx = 0;
static volatile int command_queue_ridx = 0;
static struct mutex command_queue_mutex SHAREDBSS_ATTR;
#endif
/* Tag database structures. */
/* Variable-length tag entry in tag files. */
struct tagfile_entry {
int32_t tag_length; /* Length of the data in bytes including '\0' */
int32_t idx_id; /* Corresponding entry location in index file of not unique tags */
char tag_data[0]; /* Begin of the tag data */
};
/* Fixed-size tag entry in master db index. */
struct index_entry {
int32_t tag_seek[TAG_COUNT]; /* Location of tag data or numeric tag data */
int32_t flag; /* Status flags */
};
/* Header is the same in every file. */
struct tagcache_header {
int32_t magic; /* Header version number */
int32_t datasize; /* Data size in bytes */
int32_t entry_count; /* Number of entries in this file */
};
struct master_header {
struct tagcache_header tch;
int32_t serial; /* Increasing counting number */
int32_t commitid; /* Number of commits so far */
int32_t dirty;
};
/* For the endianess correction */
static const char * const tagfile_entry_ec = "ll";
/**
Note: This should be (1 + TAG_COUNT) amount of l's.
*/
static const char * const index_entry_ec = "llllllllllllllllllllllll";
static const char * const tagcache_header_ec = "lll";
static const char * const master_header_ec = "llllll";
static struct master_header current_tcmh;
#ifdef HAVE_TC_RAMCACHE
#define TC_ALIGN_PTR(p, type, gap_out_p) \
({ typeof (p) __p = (p); \
typeof (p) __palgn = ALIGN_UP(__p, __alignof__(type)); \
*(gap_out_p) = (char *)__palgn - (char *)__p; \
__palgn; })
#define IF_TCRCDC(...) IF_DIRCACHE(__VA_ARGS__)
#ifdef HAVE_DIRCACHE
#define tcrc_dcfrefs \
((struct dircache_fileref *)(tcramcache.hdr->tags[tag_filename] + \
sizeof (struct tagcache_header)))
#endif /* HAVE_DIRCACHE */
/* Header is created when loading database to ram. */
struct ramcache_header {
char *tags[TAG_COUNT]; /* Tag file content (dcfrefs if tag_filename) */
int entry_count[TAG_COUNT]; /* Number of entries in the indices. */
struct index_entry indices[0]; /* Master index file content */
};
#ifdef HAVE_EEPROM_SETTINGS
struct statefile_header {
int32_t magic; /* Statefile version number */
struct master_header mh; /* Header from the master index */
struct ramcache_header *hdr; /* Old load address of hdr for relocation */
struct tagcache_stat tc_stat;
};
#endif /* HAVE_EEPROM_SETTINGS */
/* In-RAM ramcache structure (not persisted) */
static struct tcramcache
{
struct ramcache_header *hdr; /* allocated ramcache_header */
int handle; /* buffer handle */
} tcramcache;
static inline void tcrc_buffer_lock(void)
{
core_pin(tcramcache.handle);
}
static inline void tcrc_buffer_unlock(void)
{
core_unpin(tcramcache.handle);
}
#else /* ndef HAVE_TC_RAMCACHE */
#define IF_TCRCDC(...)
#endif /* HAVE_TC_RAMCACHE */
/**
* Full tag entries stored in a temporary file waiting
* for commit to the cache. */
struct temp_file_entry {
long tag_offset[TAG_COUNT];
short tag_length[TAG_COUNT];
long flag;
long data_length;
};
struct tempbuf_id_list {
long id;
struct tempbuf_id_list *next;
};
struct tempbuf_searchidx {
long idx_id;
char *str;
int seek;
struct tempbuf_id_list idlist;
};
/* Lookup buffer for fixing messed up index while after sorting. */
static long commit_entry_count;
static long lookup_buffer_depth;
static struct tempbuf_searchidx **lookup;
/* Used when building the temporary file. */
static int cachefd = -1, filenametag_fd;
static int total_entry_count = 0;
static int data_size = 0;
static int processed_dir_count;
/* Thread safe locking */
static volatile int write_lock;
static volatile int read_lock;
static bool delete_entry(long idx_id);
static inline void str_setlen(char *buf, size_t len)
{
buf[len] = '\0';
}
static void allocate_tempbuf(void)
{
/* Yeah, malloc would be really nice now :) */
size_t size;
tempbuf_size = 0;
#ifdef __PCTOOL__
size = 32*1024*1024;
tempbuf = malloc(size);
if (tempbuf)
tempbuf_size = size;
#else /* !__PCTOOL__ */
/* Need to pass dummy ops to prevent the buffer being moved
* out from under us, since we yield during the tagcache commit. */
tempbuf_handle = core_alloc_maximum(&size, &buflib_ops_locked);
if (tempbuf_handle > 0)
{
tempbuf = core_get_data(tempbuf_handle);
tempbuf_size = size;
}
#endif /* __PCTOOL__ */
}
static void free_tempbuf(void)
{
if (tempbuf_size == 0)
return ;
#ifdef __PCTOOL__
free(tempbuf);
#else
tempbuf_handle = core_free(tempbuf_handle);
#endif
tempbuf = NULL;
tempbuf_size = 0;
}
const char* tagcache_tag_to_str(int tag)
{
return tags_str[tag];
}
/* Helper functions for the two most read/write data structure: tagfile_entry and index_entry */
static ssize_t ecread_tagfile_entry(int fd, struct tagfile_entry *buf)
{
return ecread(fd, buf, 1, tagfile_entry_ec, tc_stat.econ);
}
enum e_ecread_errors {e_SUCCESS = 0, e_ENTRY_SIZEMISMATCH = 1, e_TAG_TOOLONG, e_TAG_SIZEMISMATCH};
static enum e_ecread_errors ecread_tagfile_entry_and_tag
(int fd, struct tagfile_entry *tfe, char* buf, int bufsz)
{
long tag_length;
str_setlen(buf, 0);
if (ecread_tagfile_entry(fd, tfe)!= sizeof(struct tagfile_entry))
{
return e_ENTRY_SIZEMISMATCH;
}
tag_length = tfe->tag_length;
if (tag_length >= bufsz)
return e_TAG_TOOLONG;
if (read(fd, buf, tag_length) != tag_length)
return e_TAG_SIZEMISMATCH;
str_setlen(buf, tag_length);
return e_SUCCESS;
}
static ssize_t ecread_index_entry(int fd, struct index_entry *buf)
{
return ecread(fd, buf, 1, index_entry_ec, tc_stat.econ);
}
static ssize_t ecwrite_index_entry(int fd, struct index_entry *buf)
{
return ecwrite(fd, buf, 1, index_entry_ec, tc_stat.econ);
}
/*
* open_db_fd and remove_db_file are noinline to minimize stack usage
*/
static int NO_INLINE open_db_fd(const char* filename, int mode)
{
char buf[MAX_PATH];
if(mode & O_CREAT)
{
if (mkdir(tc_stat.db_path) < 0 && errno != EEXIST)
return -1;
}
return open_pathfmt(buf, sizeof(buf), mode, "%s/%s",
tc_stat.db_path, filename);
}
static int NO_INLINE remove_db_file(const char* filename)
{
char buf[MAX_PATH];
snprintf(buf, sizeof(buf), "%s/%s",
tc_stat.db_path, filename);
return remove(buf);
}
static int open_tag_fd(struct tagcache_header *hdr, int tag, bool write)
{
int fd;
int rc;
char fname[MAX_PATH];
if (TAGCACHE_IS_NUMERIC(tag) || tag < 0 || tag >= TAG_COUNT)
return -1;
fd = open_pathfmt(fname, sizeof(fname),
write ? O_RDWR : O_RDONLY, "%s/" TAGCACHE_FILE_INDEX,
tc_stat.db_path, tag);
if (fd < 0)
{
logf("tag file open failed: tag=%d write=%d file= " TAGCACHE_FILE_INDEX,
tag, write, tag);
tc_stat.ready = false;
return fd;
}
/* Check the header. */
rc = ecread(fd, hdr, 1, tagcache_header_ec, tc_stat.econ);
if (hdr->magic != TAGCACHE_MAGIC || rc != sizeof(struct tagcache_header))
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
return fd;
}
static int open_master_fd(struct master_header *hdr, bool write)
{
int fd;
int rc;
fd = open_db_fd(TAGCACHE_FILE_MASTER, write ? O_RDWR : O_RDONLY);
if (fd < 0)
{
logf("master file open failed for R/W");
tc_stat.ready = false;
return fd;
}
tc_stat.econ = false;
/* Check the header. */
rc = read(fd, hdr, sizeof(struct master_header));
if (rc == sizeof(struct master_header) && hdr->tch.magic == TAGCACHE_MAGIC)
{
/* Success. */
return fd;
}
/* Trying to read again, this time with endianess correction enabled. */
lseek(fd, 0, SEEK_SET);
rc = ecread(fd, hdr, 1, master_header_ec, true);
if (rc != sizeof(struct master_header) || hdr->tch.magic != TAGCACHE_MAGIC)
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
tc_stat.econ = true;
return fd;
}
#ifndef __PCTOOL__
static bool do_timed_yield(void)
{
/* Sorting can lock up for quite a while, so yield occasionally */
static long wakeup_tick = 0;
if (TIME_AFTER(current_tick, wakeup_tick))
{
yield();
wakeup_tick = current_tick + (HZ/50);
return true;
}
return false;
}
#endif /* __PCTOOL__ */
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
/* find the ramcache entry corresponding to the file indicated by
* filename and dc (it's corresponding dircache id). */
static long find_entry_ram(const char *filename)
{
static long last_pos = 0;
struct dircache_fileref dcfref;
/* Check if tagcache is loaded into ram. */
if (!tc_stat.ramcache)
return -1;
if (dircache_search(DCS_CACHED_PATH | DCS_UPDATE_FILEREF, &dcfref,
filename) <= 0)
{
logf("tagcache: file not found.");
return -1;
}
/* Search references */
int end_pos = current_tcmh.tch.entry_count;
while (1)
{
for (int i = last_pos; i < end_pos; i++)
{
do_timed_yield();
if (!(tcramcache.hdr->indices[i].flag & FLAG_DIRCACHE))
continue;
int cmp = dircache_fileref_cmp(&tcrc_dcfrefs[i], &dcfref);
if (cmp < 3)
continue;
last_pos = MAX(0, i - 3);
return i;
}
if (last_pos == 0)
{
last_pos = MAX(0, end_pos - 3);
break;
}
end_pos = last_pos;
last_pos = 0;
}
return -1;
}
#endif /* defined (HAVE_TC_RAMCACHE) && defined (HAVE_DIRCACHE) */
static long find_entry_disk(const char *filename_raw, bool localfd)
{
struct tagcache_header tch;
static long last_pos = -1;
long pos_history[POS_HISTORY_COUNT];
long pos_history_idx = 0;
bool found = false;
struct tagfile_entry tfe;
int fd;
char buf[TAGCACHE_BUFSZ];
const long bufsz = sizeof(buf);
int i;
int pos = -1;
const char *filename = filename_raw;
#ifdef APPLICATION
char pathbuf[PATH_MAX]; /* Note: Don't use MAX_PATH here, it's too small */
if (realpath(filename, pathbuf) == pathbuf)
filename = pathbuf;
#endif /* APPLICATION */
if (!tc_stat.ready)
return -2;
fd = filenametag_fd;
if (fd < 0 || localfd)
{
last_pos = -1;
if ( (fd = open_tag_fd(&tch, tag_filename, false)) < 0)
return -1;
}
check_again:
if (last_pos > 0)
lseek(fd, last_pos, SEEK_SET);
else
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
while (true)
{
pos = lseek(fd, 0, SEEK_CUR);
for (i = pos_history_idx-1; i >= 0; i--)
pos_history[i+1] = pos_history[i];
pos_history[0] = pos;
int res = ecread_tagfile_entry_and_tag(fd, &tfe, buf, bufsz);
if (res == e_SUCCESS)
{;;}
else if (res == e_ENTRY_SIZEMISMATCH)
break;
else
{
switch (res)
{
case e_TAG_TOOLONG:
logf("too long tag #1");
close(fd);
if (!localfd)
filenametag_fd = -1;
last_pos = -1;
return -2;
case e_TAG_SIZEMISMATCH:
logf("read error #2");
close(fd);
if (!localfd)
filenametag_fd = -1;
last_pos = -1;
return -3;
default:
break;
}
}
if (!strcmp(filename, buf))
{
last_pos = pos_history[pos_history_idx];
found = true;
break ;
}
if (pos_history_idx < POS_HISTORY_COUNT - 1)
pos_history_idx++;
}
/* Not found? */
if (!found)
{
if (last_pos > 0)
{
last_pos = -1;
logf("seek again");
goto check_again;
}
if (fd != filenametag_fd || localfd)
close(fd);
return -4;
}
if (fd != filenametag_fd || localfd)
close(fd);
return tfe.idx_id;
}
static int find_index(const char *filename)
{
long idx_id = -1;
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
idx_id = find_entry_ram(filename);
#endif
if (idx_id < 0)
idx_id = find_entry_disk(filename, true);
return idx_id;
}
bool tagcache_find_index(struct tagcache_search *tcs, const char *filename)
{
int idx_id;
if (!tc_stat.ready)
return false;
idx_id = find_index(filename);
if (idx_id < 0)
return false;
if (!tagcache_search(tcs, tag_filename))
return false;
tcs->entry_count = 0;
tcs->idx_id = idx_id;
return true;
}
static bool get_index(int masterfd, int idxid,
struct index_entry *idx, bool use_ram)
{
bool localfd = false;
if (idxid < 0)
{
logf("Incorrect idxid: %d", idxid);
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tc_stat.ramcache && use_ram)
{
if (tcramcache.hdr->indices[idxid].flag & FLAG_DELETED)
return false;
*idx = tcramcache.hdr->indices[idxid];
return true;
}
#endif /* HAVE_TC_RAMCACHE */
if (masterfd < 0)
{
struct master_header tcmh;
localfd = true;
masterfd = open_master_fd(&tcmh, false);
if (masterfd < 0)
return false;
}
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (ecread_index_entry(masterfd, idx)
!= sizeof(struct index_entry))
{
logf("read error #3");
if (localfd)
close(masterfd);
return false;
}
if (localfd)
close(masterfd);
if (idx->flag & FLAG_DELETED)
return false;
return true;
(void)use_ram;
}
#ifndef __PCTOOL__
static bool write_index(int masterfd, int idxid, struct index_entry *idx)
{
/* We need to exclude all memory only flags & tags when writing to disk. */
if (idx->flag & FLAG_DIRCACHE)
{
logf("memory only flags!");
return false;
}
#ifdef HAVE_TC_RAMCACHE
/* Only update numeric data. Writing the whole index to RAM by memcpy
* destroys dircache pointers!
*/
if (tc_stat.ramcache)
{
struct index_entry *idx_ram = &tcramcache.hdr->indices[idxid];
for (int tag = 0; tag < TAG_COUNT; tag++)
{
if (TAGCACHE_IS_NUMERIC(tag))
{
idx_ram->tag_seek[tag] = idx->tag_seek[tag];
}
}
/* Don't touch the dircache flag or attributes. */
idx_ram->flag = (idx->flag & 0x0000ffff)
| (idx_ram->flag & (0xffff0000 | FLAG_DIRCACHE));
}
#endif /* HAVE_TC_RAMCACHE */
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (ecwrite_index_entry(masterfd, idx) != sizeof(struct index_entry))
{
logf("write error #3");
logf("idxid: %d", idxid);
return false;
}
return true;
}
#endif /* !__PCTOOL__ */
static bool open_files(struct tagcache_search *tcs, int tag)
{
if (tcs->idxfd[tag] < 0)
{
char fname[MAX_PATH];
tcs->idxfd[tag] = open_pathfmt(fname, sizeof(fname),
O_RDONLY, "%s/" TAGCACHE_FILE_INDEX,
tc_stat.db_path, tag);
}
if (tcs->idxfd[tag] < 0)
{
logf("File not open!");
return false;
}
return true;
}
static bool retrieve(struct tagcache_search *tcs, IF_DIRCACHE(int idx_id,)
struct index_entry *idx, int tag, char *buf, long bufsz)
{
struct tagfile_entry tfe;
long seek;
str_setlen(buf, 0);
if (TAGCACHE_IS_NUMERIC(tag))
return false;
seek = idx->tag_seek[tag];
if (seek < 0)
{
logf("Retrieve failed");
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
#ifdef HAVE_DIRCACHE
if (tag == tag_filename && (idx->flag & FLAG_DIRCACHE))
{
if (dircache_get_fileref_path(&tcrc_dcfrefs[idx_id], buf, bufsz) >= 0)
return true;
}
else
#endif /* HAVE_DIRCACHE */
if (tag != tag_filename)
{
struct tagfile_entry *ep =
(struct tagfile_entry *)&tcramcache.hdr->tags[tag][seek];
strmemccpy(buf, ep->tag_data, bufsz);
return true;
}
}
#endif /* HAVE_TC_RAMCACHE */
if (!open_files(tcs, tag))
return false;
lseek(tcs->idxfd[tag], seek, SEEK_SET);
switch (ecread_tagfile_entry_and_tag(tcs->idxfd[tag], &tfe, buf, bufsz))
{
case e_SUCCESS:
break;
case e_ENTRY_SIZEMISMATCH:
logf("read error #5");
return false;
case e_TAG_TOOLONG:
logf("too long tag #5");
return false;
case e_TAG_SIZEMISMATCH:
logf("read error #6");
return false;
default:
logf("unknown_error");
break;;
}
return true;
}
#define COMMAND_QUEUE_IS_EMPTY (command_queue_ridx == command_queue_widx)
static long find_tag(int tag, int idx_id, const struct index_entry *idx)
{
#ifndef __PCTOOL__
if (! COMMAND_QUEUE_IS_EMPTY && TAGCACHE_IS_NUMERIC(tag))
{
/* Attempt to find tag data through store-to-load forwarding in
command queue */
long result = -1;
mutex_lock(&command_queue_mutex);
int ridx = command_queue_widx;
while (ridx != command_queue_ridx)
{
if (--ridx < 0)
ridx = TAGCACHE_COMMAND_QUEUE_LENGTH - 1;
if (command_queue[ridx].command == CMD_UPDATE_NUMERIC
&& command_queue[ridx].idx_id == idx_id
&& command_queue[ridx].tag == tag)
{
result = command_queue[ridx].data;
break;
}
}
mutex_unlock(&command_queue_mutex);