4 Trivial Database 2: private types and prototypes
5 Copyright (C) Rusty Russell 2010
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 #include <ccan/likely/likely.h>
23 #include <ccan/endian/endian.h>
27 #include "system/filesys.h"
28 #include "system/time.h"
29 #include "system/shmem.h"
30 #include "system/select.h"
31 #include "system/wait.h"
51 /* #define TDB_TRACE 1 */
54 #define __STRING(x) #x
57 #ifndef __STRINGSTRING
58 #define __STRINGSTRING(x) __STRING(x)
62 #define __location__ __FILE__ ":" __STRINGSTRING(__LINE__)
65 typedef uint64_t tdb_len_t
;
66 typedef uint64_t tdb_off_t
;
68 #define TDB_MAGIC_FOOD "TDB file\n"
69 #define TDB_VERSION ((uint64_t)(0x26011967 + 7))
70 #define TDB1_VERSION (0x26011967 + 6)
71 #define TDB_USED_MAGIC ((uint64_t)0x1999)
72 #define TDB_HTABLE_MAGIC ((uint64_t)0x1888)
73 #define TDB_CHAIN_MAGIC ((uint64_t)0x1777)
74 #define TDB_FTABLE_MAGIC ((uint64_t)0x1666)
75 #define TDB_FREE_MAGIC ((uint64_t)0xFE)
76 #define TDB_HASH_MAGIC (0xA1ABE11A01092008ULL)
77 #define TDB_RECOVERY_MAGIC (0xf53bc0e7ad124589ULL)
78 #define TDB_RECOVERY_INVALID_MAGIC (0x0ULL)
80 #define TDB_OFF_IS_ERR(off) unlikely(off >= (tdb_off_t)(long)TDB_ERR_LAST)
81 #define TDB_OFF_TO_ERR(off) ((enum TDB_ERROR)(long)(off))
82 #define TDB_ERR_TO_OFF(ecode) ((tdb_off_t)(long)(ecode))
84 /* Packing errors into pointers and v.v. */
85 #define TDB_PTR_IS_ERR(ptr) \
86 unlikely((unsigned long)(ptr) >= (unsigned long)TDB_ERR_LAST)
87 #define TDB_PTR_ERR(p) ((enum TDB_ERROR)(long)(p))
88 #define TDB_ERR_PTR(err) ((void *)(long)(err))
90 /* Common case of returning true, false or -ve error. */
91 typedef int tdb_bool_err
;
93 /* Prevent others from opening the file. */
94 #define TDB_OPEN_LOCK 0
96 #define TDB_EXPANSION_LOCK 2
97 /* Doing a transaction. */
98 #define TDB_TRANSACTION_LOCK 8
99 /* Hash chain locks. */
100 #define TDB_HASH_LOCK_START 64
102 /* Range for hash locks. */
103 #define TDB_HASH_LOCK_RANGE_BITS 30
104 #define TDB_HASH_LOCK_RANGE (1 << TDB_HASH_LOCK_RANGE_BITS)
106 /* We have 1024 entries in the top level. */
107 #define TDB_TOPLEVEL_HASH_BITS 10
108 /* And 64 entries in each sub-level: thus 64 bits exactly after 9 levels. */
109 #define TDB_SUBLEVEL_HASH_BITS 6
110 /* And 8 entries in each group, ie 8 groups per sublevel. */
111 #define TDB_HASH_GROUP_BITS 3
112 /* This is currently 10: beyond this we chain. */
113 #define TDB_MAX_LEVELS (1+(64-TDB_TOPLEVEL_HASH_BITS) / TDB_SUBLEVEL_HASH_BITS)
115 /* Extend file by least 100 times larger than needed. */
116 #define TDB_EXTENSION_FACTOR 100
118 /* We steal bits from the offsets to store hash info. */
119 #define TDB_OFF_HASH_GROUP_MASK ((1ULL << TDB_HASH_GROUP_BITS) - 1)
120 /* We steal this many upper bits, giving a maximum offset of 64 exabytes. */
121 #define TDB_OFF_UPPER_STEAL 8
122 #define TDB_OFF_UPPER_STEAL_EXTRA 7
123 /* The bit number where we store extra hash bits. */
124 #define TDB_OFF_HASH_EXTRA_BIT 57
125 #define TDB_OFF_UPPER_STEAL_SUBHASH_BIT 56
127 /* Additional features we understand. Currently: none. */
128 #define TDB_FEATURE_MASK ((uint64_t)0)
130 /* The bit number where we store the extra hash bits. */
131 /* Convenience mask to get actual offset. */
132 #define TDB_OFF_MASK \
133 (((1ULL << (64 - TDB_OFF_UPPER_STEAL)) - 1) - TDB_OFF_HASH_GROUP_MASK)
135 /* How many buckets in a free list: see size_to_bucket(). */
136 #define TDB_FREE_BUCKETS (64 - TDB_OFF_UPPER_STEAL)
138 /* We have to be able to fit a free record here. */
139 #define TDB_MIN_DATA_LEN \
140 (sizeof(struct tdb_free_record) - sizeof(struct tdb_used_record))
142 /* Indicates this entry is not on an flist (can happen during coalescing) */
143 #define TDB_FTABLE_NONE ((1ULL << TDB_OFF_UPPER_STEAL) - 1)
145 struct tdb_used_record
{
146 /* For on-disk compatibility, we avoid bitfields:
152 uint64_t magic_and_meta
;
153 /* The bottom key_len_bits*2 are key length, rest is data length. */
154 uint64_t key_and_data_len
;
157 static inline unsigned rec_key_bits(const struct tdb_used_record
*r
)
159 return ((r
->magic_and_meta
>> 43) & ((1 << 5)-1)) * 2;
162 static inline uint64_t rec_key_length(const struct tdb_used_record
*r
)
164 return r
->key_and_data_len
& ((1ULL << rec_key_bits(r
)) - 1);
167 static inline uint64_t rec_data_length(const struct tdb_used_record
*r
)
169 return r
->key_and_data_len
>> rec_key_bits(r
);
172 static inline uint64_t rec_extra_padding(const struct tdb_used_record
*r
)
174 return (r
->magic_and_meta
>> 11) & 0xFFFFFFFF;
177 static inline uint32_t rec_hash(const struct tdb_used_record
*r
)
179 return r
->magic_and_meta
& ((1 << 11) - 1);
182 static inline uint16_t rec_magic(const struct tdb_used_record
*r
)
184 return (r
->magic_and_meta
>> 48);
187 struct tdb_free_record
{
188 uint64_t magic_and_prev
; /* TDB_OFF_UPPER_STEAL bits magic, then prev */
189 uint64_t ftable_and_len
; /* Len not counting these two fields. */
190 /* This is why the minimum record size is 8 bytes. */
194 static inline uint64_t frec_prev(const struct tdb_free_record
*f
)
196 return f
->magic_and_prev
& ((1ULL << (64 - TDB_OFF_UPPER_STEAL
)) - 1);
199 static inline uint64_t frec_magic(const struct tdb_free_record
*f
)
201 return f
->magic_and_prev
>> (64 - TDB_OFF_UPPER_STEAL
);
204 static inline uint64_t frec_len(const struct tdb_free_record
*f
)
206 return f
->ftable_and_len
& ((1ULL << (64 - TDB_OFF_UPPER_STEAL
))-1);
209 static inline unsigned frec_ftable(const struct tdb_free_record
*f
)
211 return f
->ftable_and_len
>> (64 - TDB_OFF_UPPER_STEAL
);
214 struct tdb_recovery_record
{
216 /* Length of record (add this header to get total length). */
220 /* Old length of file before transaction. */
224 /* If we bottom out of the subhashes, we chain. */
226 tdb_off_t rec
[1 << TDB_HASH_GROUP_BITS
];
230 /* this is stored at the front of every database */
232 char magic_food
[64]; /* for /etc/magic */
233 /* FIXME: Make me 32 bit? */
234 uint64_t version
; /* version of the code */
235 uint64_t hash_test
; /* result of hashing HASH_MAGIC. */
236 uint64_t hash_seed
; /* "random" seed written at creation time. */
237 tdb_off_t free_table
; /* (First) free table. */
238 tdb_off_t recovery
; /* Transaction recovery area. */
240 uint64_t features_used
; /* Features all writers understand */
241 uint64_t features_offered
; /* Features offered */
243 uint64_t seqnum
; /* Sequence number for TDB_SEQNUM */
245 tdb_off_t reserved
[23];
247 /* Top level hash table. */
248 tdb_off_t hashtable
[1ULL << TDB_TOPLEVEL_HASH_BITS
];
251 struct tdb_freetable
{
252 struct tdb_used_record hdr
;
254 tdb_off_t buckets
[TDB_FREE_BUCKETS
];
257 /* Information about a particular (locked) hash entry. */
259 /* Full hash value of entry. */
261 /* Start and length of lock acquired. */
262 tdb_off_t hlock_start
;
263 tdb_len_t hlock_range
;
264 /* Start of hash group. */
265 tdb_off_t group_start
;
266 /* Bucket we belong in. */
267 unsigned int home_bucket
;
268 /* Bucket we (or an empty space) were found in. */
269 unsigned int found_bucket
;
270 /* How many bits of the hash are already used. */
271 unsigned int hash_used
;
272 /* Current working group. */
273 tdb_off_t group
[1 << TDB_HASH_GROUP_BITS
];
276 struct traverse_info
{
277 struct traverse_level
{
279 /* We ignore groups here, and treat it as a big array. */
281 unsigned int total_buckets
;
282 } levels
[TDB_MAX_LEVELS
+ 1];
283 unsigned int num_levels
;
284 unsigned int toplevel_group
;
285 /* This makes delete-everything-inside-traverse work as expected. */
289 typedef uint32_t tdb1_len_t
;
290 typedef uint32_t tdb1_off_t
;
292 enum tdb_lock_flags
{
293 /* WAIT == F_SETLKW, NOWAIT == F_SETLK */
296 /* If set, don't log an error on failure. */
298 /* If set, don't check for recovery (used by recovery code). */
299 TDB_LOCK_NOCHECK
= 4,
303 struct tdb_context
*owner
;
309 /* This is only needed for tdb_access_commit, but used everywhere to
311 struct tdb_access_hdr
{
312 struct tdb_access_hdr
*next
;
319 /* How many are sharing us? */
322 /* Mmap (if any), or malloc (for TDB_INTERNAL). */
325 /* How much space has been mapped (<= current file size) */
328 /* The file descriptor (-1 for TDB_INTERNAL). */
331 /* Lock information */
333 struct tdb_lock allrecord_lock
;
335 struct tdb_lock
*lockrecs
;
337 /* Identity of this file. */
343 enum TDB_ERROR (*tread
)(struct tdb_context
*, tdb_off_t
, void *,
345 enum TDB_ERROR (*twrite
)(struct tdb_context
*, tdb_off_t
, const void *,
347 enum TDB_ERROR (*oob
)(struct tdb_context
*, tdb_off_t
, bool);
348 enum TDB_ERROR (*expand_file
)(struct tdb_context
*, tdb_len_t
);
349 void *(*direct
)(struct tdb_context
*, tdb_off_t
, size_t, bool);
356 uint64_t tdb_jenkins_hash(const void *key
, size_t length
, uint64_t seed
,
359 enum TDB_ERROR
first_in_hash(struct tdb_context
*tdb
,
360 struct traverse_info
*tinfo
,
361 TDB_DATA
*kbuf
, size_t *dlen
);
363 enum TDB_ERROR
next_in_hash(struct tdb_context
*tdb
,
364 struct traverse_info
*tinfo
,
365 TDB_DATA
*kbuf
, size_t *dlen
);
367 /* Hash random memory. */
368 uint64_t tdb_hash(struct tdb_context
*tdb
, const void *ptr
, size_t len
);
371 uint64_t hash_record(struct tdb_context
*tdb
, tdb_off_t off
);
373 /* Find and lock a hash entry (or where it would be). */
374 tdb_off_t
find_and_lock(struct tdb_context
*tdb
,
378 struct tdb_used_record
*rec
,
379 struct traverse_info
*tinfo
);
381 enum TDB_ERROR
replace_in_hash(struct tdb_context
*tdb
,
385 enum TDB_ERROR
add_to_hash(struct tdb_context
*tdb
, struct hash_info
*h
,
388 enum TDB_ERROR
delete_from_hash(struct tdb_context
*tdb
, struct hash_info
*h
);
391 bool is_subhash(tdb_off_t val
);
394 enum TDB_ERROR
tdb_ftable_init(struct tdb_context
*tdb
);
396 /* check.c needs these to iterate through free lists. */
397 tdb_off_t
first_ftable(struct tdb_context
*tdb
);
398 tdb_off_t
next_ftable(struct tdb_context
*tdb
, tdb_off_t ftable
);
400 /* This returns space or -ve error number. */
401 tdb_off_t
alloc(struct tdb_context
*tdb
, size_t keylen
, size_t datalen
,
402 uint64_t hash
, unsigned magic
, bool growing
);
404 /* Put this record in a free list. */
405 enum TDB_ERROR
add_free_record(struct tdb_context
*tdb
,
406 tdb_off_t off
, tdb_len_t len_with_header
,
407 enum tdb_lock_flags waitflag
,
410 /* Set up header for a used/ftable/htable/chain record. */
411 enum TDB_ERROR
set_header(struct tdb_context
*tdb
,
412 struct tdb_used_record
*rec
,
413 unsigned magic
, uint64_t keylen
, uint64_t datalen
,
414 uint64_t actuallen
, unsigned hashlow
);
416 /* Used by tdb_check to verify. */
417 unsigned int size_to_bucket(tdb_len_t data_len
);
418 tdb_off_t
bucket_off(tdb_off_t ftable_off
, unsigned bucket
);
420 /* Used by tdb_summary */
421 tdb_off_t
dead_space(struct tdb_context
*tdb
, tdb_off_t off
);
424 /* Initialize tdb->methods. */
425 void tdb_io_init(struct tdb_context
*tdb
);
427 /* Convert endian of the buffer if required. */
428 void *tdb_convert(const struct tdb_context
*tdb
, void *buf
, tdb_len_t size
);
430 /* Unmap and try to map the tdb. */
431 void tdb_munmap(struct tdb_file
*file
);
432 void tdb_mmap(struct tdb_context
*tdb
);
434 /* Either alloc a copy, or give direct access. Release frees or noop. */
435 const void *tdb_access_read(struct tdb_context
*tdb
,
436 tdb_off_t off
, tdb_len_t len
, bool convert
);
437 void *tdb_access_write(struct tdb_context
*tdb
,
438 tdb_off_t off
, tdb_len_t len
, bool convert
);
440 /* Release result of tdb_access_read/write. */
441 void tdb_access_release(struct tdb_context
*tdb
, const void *p
);
442 /* Commit result of tdb_acces_write. */
443 enum TDB_ERROR
tdb_access_commit(struct tdb_context
*tdb
, void *p
);
445 /* Convenience routine to get an offset. */
446 tdb_off_t
tdb_read_off(struct tdb_context
*tdb
, tdb_off_t off
);
448 /* Write an offset at an offset. */
449 enum TDB_ERROR
tdb_write_off(struct tdb_context
*tdb
, tdb_off_t off
,
452 /* Clear an ondisk area. */
453 enum TDB_ERROR
zero_out(struct tdb_context
*tdb
, tdb_off_t off
, tdb_len_t len
);
455 /* Return a non-zero offset between >= start < end in this array (or end). */
456 tdb_off_t
tdb_find_nonzero_off(struct tdb_context
*tdb
,
461 /* Return a zero offset in this array, or num. */
462 tdb_off_t
tdb_find_zero_off(struct tdb_context
*tdb
, tdb_off_t off
,
465 /* Allocate and make a copy of some offset. */
466 void *tdb_alloc_read(struct tdb_context
*tdb
, tdb_off_t offset
, tdb_len_t len
);
468 /* Writes a converted copy of a record. */
469 enum TDB_ERROR
tdb_write_convert(struct tdb_context
*tdb
, tdb_off_t off
,
470 const void *rec
, size_t len
);
472 /* Reads record and converts it */
473 enum TDB_ERROR
tdb_read_convert(struct tdb_context
*tdb
, tdb_off_t off
,
474 void *rec
, size_t len
);
476 /* Bump the seqnum (caller checks for tdb->flags & TDB_SEQNUM) */
477 void tdb_inc_seqnum(struct tdb_context
*tdb
);
480 /* Print message because another tdb owns a lock we want. */
481 enum TDB_ERROR
owner_conflict(struct tdb_context
*tdb
, const char *call
);
483 /* If we fork, we no longer really own locks. */
484 bool check_lock_pid(struct tdb_context
*tdb
, const char *call
, bool log
);
486 /* Lock/unlock a range of hashes. */
487 enum TDB_ERROR
tdb_lock_hashes(struct tdb_context
*tdb
,
488 tdb_off_t hash_lock
, tdb_len_t hash_range
,
489 int ltype
, enum tdb_lock_flags waitflag
);
490 enum TDB_ERROR
tdb_unlock_hashes(struct tdb_context
*tdb
,
492 tdb_len_t hash_range
, int ltype
);
494 /* For closing the file. */
495 void tdb_lock_cleanup(struct tdb_context
*tdb
);
497 /* Lock/unlock a particular free bucket. */
498 enum TDB_ERROR
tdb_lock_free_bucket(struct tdb_context
*tdb
, tdb_off_t b_off
,
499 enum tdb_lock_flags waitflag
);
500 void tdb_unlock_free_bucket(struct tdb_context
*tdb
, tdb_off_t b_off
);
502 /* Serialize transaction start. */
503 enum TDB_ERROR
tdb_transaction_lock(struct tdb_context
*tdb
, int ltype
);
504 void tdb_transaction_unlock(struct tdb_context
*tdb
, int ltype
);
506 /* Do we have any hash locks (ie. via tdb_chainlock) ? */
507 bool tdb_has_hash_locks(struct tdb_context
*tdb
);
509 /* Lock entire database. */
510 enum TDB_ERROR
tdb_allrecord_lock(struct tdb_context
*tdb
, int ltype
,
511 enum tdb_lock_flags flags
, bool upgradable
);
512 void tdb_allrecord_unlock(struct tdb_context
*tdb
, int ltype
);
513 enum TDB_ERROR
tdb_allrecord_upgrade(struct tdb_context
*tdb
, off_t start
);
515 /* Serialize db open. */
516 enum TDB_ERROR
tdb_lock_open(struct tdb_context
*tdb
,
517 int ltype
, enum tdb_lock_flags flags
);
518 void tdb_unlock_open(struct tdb_context
*tdb
, int ltype
);
519 bool tdb_has_open_lock(struct tdb_context
*tdb
);
521 /* Serialize db expand. */
522 enum TDB_ERROR
tdb_lock_expand(struct tdb_context
*tdb
, int ltype
);
523 void tdb_unlock_expand(struct tdb_context
*tdb
, int ltype
);
524 bool tdb_has_expansion_lock(struct tdb_context
*tdb
);
526 /* If it needs recovery, grab all the locks and do it. */
527 enum TDB_ERROR
tdb_lock_and_recover(struct tdb_context
*tdb
);
529 /* Byte-range lock wrappers for TDB1 to access. */
530 enum TDB_ERROR
tdb_brlock(struct tdb_context
*tdb
,
531 int rw_type
, tdb_off_t offset
, tdb_off_t len
,
532 enum tdb_lock_flags flags
);
534 enum TDB_ERROR
tdb_brunlock(struct tdb_context
*tdb
,
535 int rw_type
, tdb_off_t offset
, size_t len
);
537 enum TDB_ERROR
tdb_nest_lock(struct tdb_context
*tdb
,
538 tdb_off_t offset
, int ltype
,
539 enum tdb_lock_flags flags
);
541 enum TDB_ERROR
tdb_nest_unlock(struct tdb_context
*tdb
,
542 tdb_off_t off
, int ltype
);
544 enum TDB_ERROR
tdb_lock_gradual(struct tdb_context
*tdb
,
545 int ltype
, enum tdb_lock_flags flags
,
546 tdb_off_t off
, tdb_off_t len
);
548 /* Default lock and unlock functions. */
549 int tdb_fcntl_lock(int fd
, int rw
, off_t off
, off_t len
, bool waitflag
, void *);
550 int tdb_fcntl_unlock(int fd
, int rw
, off_t off
, off_t len
, void *);
553 enum TDB_ERROR
tdb_transaction_recover(struct tdb_context
*tdb
);
554 tdb_bool_err
tdb_needs_recovery(struct tdb_context
*tdb
);
556 /* this is stored at the front of every database */
558 char magic_food
[32]; /* for /etc/magic */
559 uint32_t version
; /* version of the code */
560 uint32_t hash_size
; /* number of hash entries */
561 tdb1_off_t rwlocks
; /* obsolete - kept to detect old formats */
562 tdb1_off_t recovery_start
; /* offset of transaction recovery region */
563 tdb1_off_t sequence_number
; /* used when TDB1_SEQNUM is set */
564 uint32_t magic1_hash
; /* hash of TDB_MAGIC_FOOD. */
565 uint32_t magic2_hash
; /* hash of TDB1_MAGIC. */
566 tdb1_off_t reserved
[27];
569 struct tdb1_traverse_lock
{
570 struct tdb1_traverse_lock
*next
;
577 /* Single list of all TDBs, to detect multiple opens. */
578 struct tdb_context
*next
;
580 /* Filename of the database. */
583 /* Logging function */
584 void (*log_fn
)(struct tdb_context
*tdb
,
585 enum tdb_log_level level
,
586 enum TDB_ERROR ecode
,
591 /* Open flags passed to tdb_open. */
594 /* low level (fnctl) lock functions. */
595 int (*lock_fn
)(int fd
, int rw
, off_t off
, off_t len
, bool w
, void *);
596 int (*unlock_fn
)(int fd
, int rw
, off_t off
, off_t len
, void *);
599 /* the tdb flags passed to tdb_open. */
602 /* Our statistics. */
603 struct tdb_attribute_stats stats
;
605 /* The actual file information */
606 struct tdb_file
*file
;
609 uint64_t (*hash_fn
)(const void *key
, size_t len
, uint64_t seed
, void *);
613 /* Our open hook, if any. */
614 enum TDB_ERROR (*openhook
)(int fd
, void *data
);
617 /* Last error we returned. */
618 enum TDB_ERROR last_error
;
622 /* Are we accessing directly? (debugging check). */
625 /* Set if we are in a transaction. */
626 struct tdb_transaction
*transaction
;
628 /* What free table are we using? */
629 tdb_off_t ftable_off
;
632 /* IO methods: changes for transactions. */
633 const struct tdb_methods
*io
;
635 /* Direct access information */
636 struct tdb_access_hdr
*access
;
640 int traverse_read
; /* read-only traversal */
641 int traverse_write
; /* read-write traversal */
643 struct tdb1_header header
; /* a cached copy of the header */
644 struct tdb1_traverse_lock travlocks
; /* current traversal locks */
645 const struct tdb1_methods
*io
;
646 struct tdb1_transaction
*transaction
;
648 int max_dead_records
;
652 #define TDB1_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24))
655 int tdb1_check(struct tdb_context
*tdb
,
656 enum TDB_ERROR (*check
)(TDB_DATA key
, TDB_DATA data
, void *),
661 enum TDB_ERROR
tdb1_new_database(struct tdb_context
*tdb
,
662 struct tdb_attribute_tdb1_hashsize
*hashsize
,
663 struct tdb_attribute_tdb1_max_dead
*max_dead
);
664 enum TDB_ERROR
tdb1_open(struct tdb_context
*tdb
,
665 struct tdb_attribute_tdb1_max_dead
*max_dead
);
668 enum TDB_ERROR
tdb1_probe_length(struct tdb_context
*tdb
);
671 int tdb1_allrecord_lock(struct tdb_context
*tdb
, int ltype
,
672 enum tdb_lock_flags flags
, bool upgradable
);
673 int tdb1_allrecord_unlock(struct tdb_context
*tdb
, int ltype
);
675 int tdb1_chainlock(struct tdb_context
*tdb
, TDB_DATA key
);
676 int tdb1_chainunlock(struct tdb_context
*tdb
, TDB_DATA key
);
677 int tdb1_chainlock_read(struct tdb_context
*tdb
, TDB_DATA key
);
678 int tdb1_chainunlock_read(struct tdb_context
*tdb
, TDB_DATA key
);
680 /* tdb1_transaction.c: */
681 int tdb1_transaction_recover(struct tdb_context
*tdb
);
682 int tdb1_transaction_cancel(struct tdb_context
*tdb
);
684 /* tdb1_traverse.c: */
685 int tdb1_traverse(struct tdb_context
*tdb
,
686 int (*)(struct tdb_context
*, TDB_DATA
, TDB_DATA
, void *),
689 /* tdb1_summary.c: */
690 char *tdb1_summary(struct tdb_context
*tdb
);
693 int tdb1_store(struct tdb_context
*tdb
, TDB_DATA key
, TDB_DATA dbuf
, int flag
);
694 enum TDB_ERROR
tdb1_fetch(struct tdb_context
*tdb
, TDB_DATA key
,
696 int tdb1_append(struct tdb_context
*tdb
, TDB_DATA key
, TDB_DATA new_dbuf
);
697 int tdb1_delete(struct tdb_context
*tdb
, TDB_DATA key
);
698 int tdb1_exists(struct tdb_context
*tdb
, TDB_DATA key
);
699 enum TDB_ERROR
tdb1_parse_record(struct tdb_context
*tdb
, TDB_DATA key
,
700 enum TDB_ERROR (*parser
)(TDB_DATA key
,
704 void tdb1_increment_seqnum_nonblock(struct tdb_context
*tdb
);
705 int tdb1_get_seqnum(struct tdb_context
*tdb
);
706 int tdb1_wipe_all(struct tdb_context
*tdb
);
708 /* tdb1_transaction.c: */
709 int tdb1_transaction_start(struct tdb_context
*tdb
);
710 int tdb1_transaction_prepare_commit(struct tdb_context
*tdb
);
711 int tdb1_transaction_commit(struct tdb_context
*tdb
);
713 /* tdb1_traverse.c: */
714 TDB_DATA
tdb1_firstkey(struct tdb_context
*tdb
);
715 TDB_DATA
tdb1_nextkey(struct tdb_context
*tdb
, TDB_DATA key
);
718 enum TDB_ERROR COLD
tdb_logerr(struct tdb_context
*tdb
,
719 enum TDB_ERROR ecode
,
720 enum tdb_log_level level
,
721 const char *fmt
, ...);
724 void tdb_trace(struct tdb_context
*tdb
, const char *op
);
725 void tdb_trace_seqnum(struct tdb_context
*tdb
, uint32_t seqnum
, const char *op
);
726 void tdb_trace_open(struct tdb_context
*tdb
, const char *op
,
727 unsigned hash_size
, unsigned tdb_flags
, unsigned open_flags
);
728 void tdb_trace_ret(struct tdb_context
*tdb
, const char *op
, int ret
);
729 void tdb_trace_retrec(struct tdb_context
*tdb
, const char *op
, TDB_DATA ret
);
730 void tdb_trace_1rec(struct tdb_context
*tdb
, const char *op
,
732 void tdb_trace_1rec_ret(struct tdb_context
*tdb
, const char *op
,
733 TDB_DATA rec
, int ret
);
734 void tdb_trace_1rec_retrec(struct tdb_context
*tdb
, const char *op
,
735 TDB_DATA rec
, TDB_DATA ret
);
736 void tdb_trace_2rec_flag_ret(struct tdb_context
*tdb
, const char *op
,
737 TDB_DATA rec1
, TDB_DATA rec2
, unsigned flag
,
739 void tdb_trace_2rec_retrec(struct tdb_context
*tdb
, const char *op
,
740 TDB_DATA rec1
, TDB_DATA rec2
, TDB_DATA ret
);
742 #define tdb_trace(tdb, op)
743 #define tdb_trace_seqnum(tdb, seqnum, op)
744 #define tdb_trace_open(tdb, op, hash_size, tdb_flags, open_flags)
745 #define tdb_trace_ret(tdb, op, ret)
746 #define tdb_trace_retrec(tdb, op, ret)
747 #define tdb_trace_1rec(tdb, op, rec)
748 #define tdb_trace_1rec_ret(tdb, op, rec, ret)
749 #define tdb_trace_1rec_retrec(tdb, op, rec, ret)
750 #define tdb_trace_2rec_flag_ret(tdb, op, rec1, rec2, flag, ret)
751 #define tdb_trace_2rec_retrec(tdb, op, rec1, rec2, ret)
752 #endif /* !TDB_TRACE */