#define TDB_MAGIC_FOOD "TDB file\n"
#define TDB_VERSION ((uint64_t)(0x26011967 + 7))
+#define TDB1_VERSION (0x26011967 + 6)
#define TDB_USED_MAGIC ((uint64_t)0x1999)
#define TDB_HTABLE_MAGIC ((uint64_t)0x1888)
#define TDB_CHAIN_MAGIC ((uint64_t)0x1777)
tdb_off_t prev;
};
+typedef uint32_t tdb1_len_t;
+typedef uint32_t tdb1_off_t;
+
enum tdb_lock_flags {
/* WAIT == F_SETLKW, NOWAIT == F_SETLK */
TDB_LOCK_NOWAIT = 0,
};
struct tdb_file {
- /* Single list of all TDBs, to detect multiple opens. */
- struct tdb_file *next;
-
/* How many are sharing us? */
unsigned int refcnt;
ino_t inode;
};
-struct tdb_context {
- /* Filename of the database. */
- const char *name;
-
- /* Are we accessing directly? (debugging check). */
- int direct_access;
-
- /* Operating read-only? (Opened O_RDONLY, or in traverse_read) */
- bool read_only;
-
- /* Open flags passed to tdb_open. */
- int open_flags;
-
- /* the flags passed to tdb_open, for tdb_reopen. */
- uint32_t flags;
-
- /* Logging function */
- void (*log_fn)(struct tdb_context *tdb,
- enum tdb_log_level level,
- enum TDB_ERROR ecode,
- const char *message,
- void *data);
- void *log_data;
-
- /* Hash function. */
- uint64_t (*hash_fn)(const void *key, size_t len, uint64_t seed, void *);
- void *hash_data;
- uint64_t hash_seed;
-
- /* low level (fnctl) lock functions. */
- int (*lock_fn)(int fd, int rw, off_t off, off_t len, bool w, void *);
- int (*unlock_fn)(int fd, int rw, off_t off, off_t len, void *);
- void *lock_data;
-
- /* Set if we are in a transaction. */
- struct tdb_transaction *transaction;
-
- /* What free table are we using? */
- tdb_off_t ftable_off;
- unsigned int ftable;
-
- /* IO methods: changes for transactions. */
- const struct tdb_methods *methods;
-
- /* Our statistics. */
- struct tdb_attribute_stats stats;
-
- /* Direct access information */
- struct tdb_access_hdr *access;
-
- /* Last error we returned. */
- enum TDB_ERROR last_error;
-
- /* The actual file information */
- struct tdb_file *file;
-};
-
struct tdb_methods {
enum TDB_ERROR (*tread)(struct tdb_context *, tdb_off_t, void *,
tdb_len_t);
internal prototypes
*/
/* hash.c: */
+uint64_t tdb_jenkins_hash(const void *key, size_t length, uint64_t seed,
+ void *unused);
+
tdb_bool_err first_in_hash(struct tdb_context *tdb,
struct traverse_info *tinfo,
TDB_DATA *kbuf, size_t *dlen);
enum TDB_ERROR tdb_allrecord_lock(struct tdb_context *tdb, int ltype,
enum tdb_lock_flags flags, bool upgradable);
void tdb_allrecord_unlock(struct tdb_context *tdb, int ltype);
-enum TDB_ERROR tdb_allrecord_upgrade(struct tdb_context *tdb);
+enum TDB_ERROR tdb_allrecord_upgrade(struct tdb_context *tdb, off_t start);
/* Serialize db open. */
enum TDB_ERROR tdb_lock_open(struct tdb_context *tdb,
/* If it needs recovery, grab all the locks and do it. */
enum TDB_ERROR tdb_lock_and_recover(struct tdb_context *tdb);
+/* Byte-range lock wrappers for TDB1 to access. */
+enum TDB_ERROR tdb_brlock(struct tdb_context *tdb,
+ int rw_type, tdb_off_t offset, tdb_off_t len,
+ enum tdb_lock_flags flags);
+
+enum TDB_ERROR tdb_brunlock(struct tdb_context *tdb,
+ int rw_type, tdb_off_t offset, size_t len);
+
+enum TDB_ERROR tdb_nest_lock(struct tdb_context *tdb,
+ tdb_off_t offset, int ltype,
+ enum tdb_lock_flags flags);
+
+enum TDB_ERROR tdb_nest_unlock(struct tdb_context *tdb,
+ tdb_off_t off, int ltype);
+
+enum TDB_ERROR tdb_lock_gradual(struct tdb_context *tdb,
+ int ltype, enum tdb_lock_flags flags,
+ tdb_off_t off, tdb_off_t len);
+
/* Default lock and unlock functions. */
int tdb_fcntl_lock(int fd, int rw, off_t off, off_t len, bool waitflag, void *);
int tdb_fcntl_unlock(int fd, int rw, off_t off, off_t len, void *);
enum TDB_ERROR tdb_transaction_recover(struct tdb_context *tdb);
tdb_bool_err tdb_needs_recovery(struct tdb_context *tdb);
+/* this is stored at the front of every database */
+struct tdb1_header {
+ char magic_food[32]; /* for /etc/magic */
+ uint32_t version; /* version of the code */
+ uint32_t hash_size; /* number of hash entries */
+ tdb1_off_t rwlocks; /* obsolete - kept to detect old formats */
+ tdb1_off_t recovery_start; /* offset of transaction recovery region */
+ tdb1_off_t sequence_number; /* used when TDB1_SEQNUM is set */
+ uint32_t magic1_hash; /* hash of TDB_MAGIC_FOOD. */
+ uint32_t magic2_hash; /* hash of TDB1_MAGIC. */
+ tdb1_off_t reserved[27];
+};
+
+struct tdb1_traverse_lock {
+ struct tdb1_traverse_lock *next;
+ uint32_t off;
+ uint32_t hash;
+ int lock_rw;
+};
+
+struct tdb_context {
+ /* Single list of all TDBs, to detect multiple opens. */
+ struct tdb_context *next;
+
+ /* Filename of the database. */
+ const char *name;
+
+ /* Logging function */
+ void (*log_fn)(struct tdb_context *tdb,
+ enum tdb_log_level level,
+ enum TDB_ERROR ecode,
+ const char *message,
+ void *data);
+ void *log_data;
+
+ /* Open flags passed to tdb_open. */
+ int open_flags;
+
+ /* low level (fnctl) lock functions. */
+ int (*lock_fn)(int fd, int rw, off_t off, off_t len, bool w, void *);
+ int (*unlock_fn)(int fd, int rw, off_t off, off_t len, void *);
+ void *lock_data;
+
+ /* the tdb flags passed to tdb_open. */
+ uint32_t flags;
+
+ /* Our statistics. */
+ struct tdb_attribute_stats stats;
+
+ /* The actual file information */
+ struct tdb_file *file;
+
+ /* Hash function. */
+ uint64_t (*hash_fn)(const void *key, size_t len, uint64_t seed, void *);
+ void *hash_data;
+ uint64_t hash_seed;
+
+ /* Our open hook, if any. */
+ enum TDB_ERROR (*openhook)(int fd, void *data);
+ void *openhook_data;
+
+ /* Last error we returned. */
+ enum TDB_ERROR last_error;
+
+ struct {
+
+ /* Are we accessing directly? (debugging check). */
+ int direct_access;
+
+ /* Set if we are in a transaction. */
+ struct tdb_transaction *transaction;
+
+ /* What free table are we using? */
+ tdb_off_t ftable_off;
+ unsigned int ftable;
+
+ /* IO methods: changes for transactions. */
+ const struct tdb_methods *io;
+
+ /* Direct access information */
+ struct tdb_access_hdr *access;
+ } tdb2;
+
+ struct {
+ int traverse_read; /* read-only traversal */
+ int traverse_write; /* read-write traversal */
+
+ struct tdb1_header header; /* a cached copy of the header */
+ struct tdb1_traverse_lock travlocks; /* current traversal locks */
+ const struct tdb1_methods *io;
+ struct tdb1_transaction *transaction;
+ int page_size;
+ int max_dead_records;
+ } tdb1;
+};
+
+#define TDB1_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24))
+
+/* tdb1_open.c: */
+int tdb1_new_database(struct tdb_context *tdb,
+ struct tdb_attribute_tdb1_hashsize *hashsize);
+enum TDB_ERROR tdb1_open(struct tdb_context *tdb);
+
+/* tdb1_io.c: */
+enum TDB_ERROR tdb1_probe_length(struct tdb_context *tdb);
+
+/* tdb1_lock.c: */
+int tdb1_allrecord_unlock(struct tdb_context *tdb, int ltype);
+
+/* tdb1_transaction.c: */
+int tdb1_transaction_recover(struct tdb_context *tdb);
+int tdb1_transaction_cancel(struct tdb_context *tdb);
+
+/* tdb1_tdb.c: */
+int tdb1_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
+enum TDB_ERROR tdb1_fetch(struct tdb_context *tdb, TDB_DATA key,
+ TDB_DATA *data);
+int tdb1_append(struct tdb_context *tdb, TDB_DATA key, TDB_DATA new_dbuf);
+
/* tdb.c: */
enum TDB_ERROR COLD tdb_logerr(struct tdb_context *tdb,
enum TDB_ERROR ecode,
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