1 #ifndef CCAN_TDB2_TDB1_PRIVATE_H
2 #define CCAN_TDB2_TDB1_PRIVATE_H
4 Unix SMB/CIFS implementation.
6 trivial database library - private includes
8 Copyright (C) Andrew Tridgell 2005
10 ** NOTE! The following LGPL license applies to the tdb
11 ** library. This does NOT imply that all of Samba is released
14 This library is free software; you can redistribute it and/or
15 modify it under the terms of the GNU Lesser General Public
16 License as published by the Free Software Foundation; either
17 version 3 of the License, or (at your option) any later version.
19 This library is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 Lesser General Public License for more details.
24 You should have received a copy of the GNU Lesser General Public
25 License along with this library; if not, see <http://www.gnu.org/licenses/>.
31 /**** FIXME: Type overrides for tdb2, for transition! */
32 #define tdb_logerr(tdb, ecode, level, ...) \
33 tdb_logerr((struct tdb_context *)(tdb), (ecode), (level), __VA_ARGS__)
35 #define tdb_error(tdb) \
36 tdb_error((struct tdb_context *)(tdb))
38 #define tdb_brlock(tdb1, rw_type, offset, len, flags) \
39 tdb_brlock((struct tdb_context *)(tdb1), \
40 (rw_type), (offset), (len), (flags))
42 #define tdb_brunlock(tdb1, rw_type, offset, len) \
43 tdb_brunlock((struct tdb_context *)(tdb1), (rw_type), (offset), (len))
45 #define tdb_nest_lock(tdb1, offset, ltype, flags) \
46 tdb_nest_lock((struct tdb_context *)(tdb1), (offset), (ltype), (flags))
48 #define tdb_nest_unlock(tdb1, offset, ltype) \
49 tdb_nest_unlock((struct tdb_context *)(tdb1), (offset), (ltype))
51 #define tdb_allrecord_lock(tdb1, offset, flags, upgradable) \
52 tdb_allrecord_lock((struct tdb_context *)(tdb1), \
53 (offset), (flags), (upgradable))
55 #define tdb_allrecord_unlock(tdb1, ltype) \
56 tdb_allrecord_unlock((struct tdb_context *)(tdb1), (ltype))
58 #define tdb_allrecord_upgrade(tdb1, start) \
59 tdb_allrecord_upgrade((struct tdb_context *)(tdb1), (start))
61 #define tdb_hash(tdb1, ptr, len) \
62 tdb_hash((struct tdb_context *)(tdb1), (ptr), (len))
64 #define tdb_lock_gradual(tdb1, ltype, flags, off, len) \
65 tdb_lock_gradual((struct tdb_context *)(tdb1), \
66 (ltype), (flags), (off), (len))
71 /* #define TDB_TRACE 1 */
72 #ifndef HAVE_GETPAGESIZE
73 #define getpagesize() 0x2000
77 #define __STRING(x) #x
80 #ifndef __STRINGSTRING
81 #define __STRINGSTRING(x) __STRING(x)
85 #define __location__ __FILE__ ":" __STRINGSTRING(__LINE__)
88 typedef uint32_t tdb1_len_t;
89 typedef uint32_t tdb1_off_t;
92 #define offsetof(t,f) ((unsigned int)&((t *)0)->f)
95 #define TDB1_VERSION (0x26011967 + 6)
96 #define TDB1_MAGIC (0x26011999U)
97 #define TDB1_FREE_MAGIC (~TDB1_MAGIC)
98 #define TDB1_DEAD_MAGIC (0xFEE1DEAD)
99 #define TDB1_RECOVERY_MAGIC (0xf53bc0e7U)
100 #define TDB1_RECOVERY_INVALID_MAGIC (0x0)
101 #define TDB1_HASH_RWLOCK_MAGIC (0xbad1a51U)
102 #define TDB1_ALIGNMENT 4
103 #define TDB1_DEFAULT_HASH_SIZE 131
104 #define TDB1_FREELIST_TOP (sizeof(struct tdb1_header))
105 #define TDB1_ALIGN(x,a) (((x) + (a)-1) & ~((a)-1))
106 #define TDB1_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24))
107 #define TDB1_DEAD(r) ((r)->magic == TDB1_DEAD_MAGIC)
108 #define TDB1_BAD_MAGIC(r) ((r)->magic != TDB1_MAGIC && !TDB1_DEAD(r))
109 #define TDB1_HASH_TOP(hash) (TDB1_FREELIST_TOP + (TDB1_BUCKET(hash)+1)*sizeof(tdb1_off_t))
110 #define TDB1_HASHTABLE_SIZE(tdb) ((tdb->header.hash_size+1)*sizeof(tdb1_off_t))
111 #define TDB1_DATA_START(hash_size) (TDB1_HASH_TOP(hash_size-1) + sizeof(tdb1_off_t))
112 #define TDB1_RECOVERY_HEAD offsetof(struct tdb1_header, recovery_start)
113 #define TDB1_SEQNUM_OFS offsetof(struct tdb1_header, sequence_number)
114 #define TDB1_PAD_BYTE 0x42
115 #define TDB1_PAD_U32 0x42424242
118 #define TDB1_OPEN_LOCK 0
119 #define TDB1_ACTIVE_LOCK 4
120 #define TDB1_TRANSACTION_LOCK 8
122 /* free memory if the pointer is valid and zero the pointer */
124 #define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
127 #define TDB1_BUCKET(hash) ((hash) % tdb->header.hash_size)
129 #define TDB1_DOCONV() (tdb->flags & TDB_CONVERT)
130 #define TDB1_CONV(x) (TDB1_DOCONV() ? tdb1_convert(&x, sizeof(x)) : &x)
132 /* the body of the database is made of one tdb1_record for the free space
133 plus a separate data list for each hash value */
135 tdb1_off_t next; /* offset of the next record in the list */
136 tdb1_len_t rec_len; /* total byte length of record */
137 tdb1_len_t key_len; /* byte length of key */
138 tdb1_len_t data_len; /* byte length of data */
139 uint32_t full_hash; /* the full 32 bit hash of the key */
140 uint32_t magic; /* try to catch errors */
141 /* the following union is implied:
143 char record[rec_len];
148 uint32_t totalsize; (tailer)
154 /* this is stored at the front of every database */
156 char magic_food[32]; /* for /etc/magic */
157 uint32_t version; /* version of the code */
158 uint32_t hash_size; /* number of hash entries */
159 tdb1_off_t rwlocks; /* obsolete - kept to detect old formats */
160 tdb1_off_t recovery_start; /* offset of transaction recovery region */
161 tdb1_off_t sequence_number; /* used when TDB1_SEQNUM is set */
162 uint32_t magic1_hash; /* hash of TDB_MAGIC_FOOD. */
163 uint32_t magic2_hash; /* hash of TDB1_MAGIC. */
164 tdb1_off_t reserved[27];
167 struct tdb1_traverse_lock {
168 struct tdb1_traverse_lock *next;
176 struct tdb1_methods {
177 int (*tdb1_read)(struct tdb1_context *, tdb1_off_t , void *, tdb1_len_t , int );
178 int (*tdb1_write)(struct tdb1_context *, tdb1_off_t, const void *, tdb1_len_t);
179 void (*next_hash_chain)(struct tdb1_context *, uint32_t *);
180 int (*tdb1_oob)(struct tdb1_context *, tdb1_off_t , int );
181 int (*tdb1_expand_file)(struct tdb1_context *, tdb1_off_t , tdb1_off_t );
184 struct tdb1_context {
185 struct tdb1_context *next;
187 char *name; /* the name of the database */
189 /* Logging function */
190 void (*log_fn)(struct tdb1_context *tdb,
191 enum tdb_log_level level,
192 enum TDB_ERROR ecode,
197 /* Last error we returned. */
198 enum TDB_ERROR last_error; /* error code for last tdb error */
200 /* The actual file information */
201 struct tdb_file *file;
203 int open_flags; /* flags used in the open - needed by reopen */
205 /* low level (fnctl) lock functions. */
206 int (*lock_fn)(int fd, int rw, off_t off, off_t len, bool w, void *);
207 int (*unlock_fn)(int fd, int rw, off_t off, off_t len, void *);
210 uint32_t flags; /* the flags passed to tdb1_open */
212 /* Our statistics. */
213 struct tdb_attribute_stats stats;
216 uint64_t (*hash_fn)(const void *key, size_t len, uint64_t seed, void *);
220 int traverse_read; /* read-only traversal */
221 int traverse_write; /* read-write traversal */
222 struct tdb1_header header; /* a cached copy of the header */
223 struct tdb1_traverse_lock travlocks; /* current traversal locks */
224 const struct tdb1_methods *methods;
225 struct tdb1_transaction *transaction;
227 int max_dead_records;
233 int tdb1_munmap(struct tdb1_context *tdb);
234 void tdb1_mmap(struct tdb1_context *tdb);
235 int tdb1_lock(struct tdb1_context *tdb, int list, int ltype);
236 int tdb1_nest_lock(struct tdb1_context *tdb, uint32_t offset, int ltype,
237 enum tdb_lock_flags flags);
238 int tdb1_nest_unlock(struct tdb1_context *tdb, uint32_t offset, int ltype);
239 int tdb1_unlock(struct tdb1_context *tdb, int list, int ltype);
240 int tdb1_brlock(struct tdb1_context *tdb,
241 int rw_type, tdb1_off_t offset, size_t len,
242 enum tdb_lock_flags flags);
243 int tdb1_brunlock(struct tdb1_context *tdb,
244 int rw_type, tdb1_off_t offset, size_t len);
245 bool tdb1_have_extra_locks(struct tdb1_context *tdb);
246 void tdb1_release_transaction_locks(struct tdb1_context *tdb);
247 int tdb1_transaction_lock(struct tdb1_context *tdb, int ltype,
248 enum tdb_lock_flags lockflags);
249 int tdb1_transaction_unlock(struct tdb1_context *tdb, int ltype);
250 int tdb1_recovery_area(struct tdb1_context *tdb,
251 const struct tdb1_methods *methods,
252 tdb1_off_t *recovery_offset,
253 struct tdb1_record *rec);
254 int tdb1_allrecord_lock(struct tdb1_context *tdb, int ltype,
255 enum tdb_lock_flags flags, bool upgradable);
256 int tdb1_allrecord_unlock(struct tdb1_context *tdb, int ltype);
257 int tdb1_allrecord_upgrade(struct tdb1_context *tdb);
258 int tdb1_write_lock_record(struct tdb1_context *tdb, tdb1_off_t off);
259 int tdb1_write_unlock_record(struct tdb1_context *tdb, tdb1_off_t off);
260 int tdb1_ofs_read(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_off_t *d);
261 int tdb1_ofs_write(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_off_t *d);
262 void *tdb1_convert(void *buf, uint32_t size);
263 int tdb1_free(struct tdb1_context *tdb, tdb1_off_t offset, struct tdb1_record *rec);
264 tdb1_off_t tdb1_allocate(struct tdb1_context *tdb, tdb1_len_t length, struct tdb1_record *rec);
265 int tdb1_ofs_read(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_off_t *d);
266 int tdb1_ofs_write(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_off_t *d);
267 int tdb1_lock_record(struct tdb1_context *tdb, tdb1_off_t off);
268 int tdb1_unlock_record(struct tdb1_context *tdb, tdb1_off_t off);
269 bool tdb1_needs_recovery(struct tdb1_context *tdb);
270 int tdb1_rec_read(struct tdb1_context *tdb, tdb1_off_t offset, struct tdb1_record *rec);
271 int tdb1_rec_write(struct tdb1_context *tdb, tdb1_off_t offset, struct tdb1_record *rec);
272 int tdb1_do_delete(struct tdb1_context *tdb, tdb1_off_t rec_ptr, struct tdb1_record *rec);
273 unsigned char *tdb1_alloc_read(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_len_t len);
274 int tdb1_parse_data(struct tdb1_context *tdb, TDB_DATA key,
275 tdb1_off_t offset, tdb1_len_t len,
276 int (*parser)(TDB_DATA key, TDB_DATA data,
279 tdb1_off_t tdb1_find_lock_hash(struct tdb1_context *tdb, TDB_DATA key, uint32_t hash, int locktype,
280 struct tdb1_record *rec);
281 void tdb1_io_init(struct tdb1_context *tdb);
282 int tdb1_expand(struct tdb1_context *tdb, tdb1_off_t size);
283 int tdb1_rec_free_read(struct tdb1_context *tdb, tdb1_off_t off,
284 struct tdb1_record *rec);
285 bool tdb1_write_all(int fd, const void *buf, size_t count);
286 int tdb1_transaction_recover(struct tdb1_context *tdb);
287 void tdb1_header_hash(struct tdb1_context *tdb,
288 uint32_t *magic1_hash, uint32_t *magic2_hash);
289 uint64_t tdb1_old_hash(const void *key, size_t len, uint64_t seed, void *);
290 size_t tdb1_dead_space(struct tdb1_context *tdb, tdb1_off_t off);
291 #endif /* CCAN_TDB2_TDB1_PRIVATE_H */