tdb2: add lib/tdb2 (from CCAN init-1161-g661d41f)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 614 insertions, 0 deletions

diff --git a/lib/tdb2/private.h b/lib/tdb2/private.h
new file mode 100644
index 0000000000..135e3df936
--- /dev/null
+++ b/lib/tdb2/private.h
@@ -0,0 +1,614 @@
+#ifndef TDB_PRIVATE_H
+#define TDB_PRIVATE_H
+ /*
+   Trivial Database 2: private types and prototypes
+   Copyright (C) Rusty Russell 2010
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+#if HAVE_FILE_OFFSET_BITS
+#define _FILE_OFFSET_BITS 64
+#endif
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <utime.h>
+#include <unistd.h>
+#include <ccan/tdb2/tdb2.h>
+#include <ccan/likely/likely.h>
+#include <ccan/compiler/compiler.h>
+#include <ccan/endian/endian.h>
+
+#ifndef TEST_IT
+#define TEST_IT(cond)
+#endif
+
+/* #define TDB_TRACE 1 */
+
+#ifndef __STRING
+#define __STRING(x)    #x
+#endif
+
+#ifndef __STRINGSTRING
+#define __STRINGSTRING(x) __STRING(x)
+#endif
+
+#ifndef __location__
+#define __location__ __FILE__ ":" __STRINGSTRING(__LINE__)
+#endif
+
+typedef uint64_t tdb_len_t;
+typedef uint64_t tdb_off_t;
+
+#define TDB_MAGIC_FOOD "TDB file\n"
+#define TDB_VERSION ((uint64_t)(0x26011967 + 7))
+#define TDB_USED_MAGIC ((uint64_t)0x1999)
+#define TDB_HTABLE_MAGIC ((uint64_t)0x1888)
+#define TDB_CHAIN_MAGIC ((uint64_t)0x1777)
+#define TDB_FTABLE_MAGIC ((uint64_t)0x1666)
+#define TDB_FREE_MAGIC ((uint64_t)0xFE)
+#define TDB_HASH_MAGIC (0xA1ABE11A01092008ULL)
+#define TDB_RECOVERY_MAGIC (0xf53bc0e7ad124589ULL)
+#define TDB_RECOVERY_INVALID_MAGIC (0x0ULL)
+
+#define TDB_OFF_IS_ERR(off) unlikely(off >= (tdb_off_t)TDB_ERR_LAST)
+
+/* Packing errors into pointers and v.v. */
+#define TDB_PTR_IS_ERR(ptr) \
+	unlikely((unsigned long)(ptr) >= (unsigned long)TDB_ERR_LAST)
+#define TDB_PTR_ERR(p) ((enum TDB_ERROR)(long)(p))
+#define TDB_ERR_PTR(err) ((void *)(long)(err))
+
+/* Common case of returning true, false or -ve error. */
+typedef int tdb_bool_err;
+
+/* Prevent others from opening the file. */
+#define TDB_OPEN_LOCK 0
+/* Doing a transaction. */
+#define TDB_TRANSACTION_LOCK 1
+/* Expanding file. */
+#define TDB_EXPANSION_LOCK 2
+/* Hash chain locks. */
+#define TDB_HASH_LOCK_START 64
+
+/* Range for hash locks. */
+#define TDB_HASH_LOCK_RANGE_BITS 30
+#define TDB_HASH_LOCK_RANGE (1 << TDB_HASH_LOCK_RANGE_BITS)
+
+/* We have 1024 entries in the top level. */
+#define TDB_TOPLEVEL_HASH_BITS 10
+/* And 64 entries in each sub-level: thus 64 bits exactly after 9 levels. */
+#define TDB_SUBLEVEL_HASH_BITS 6
+/* And 8 entries in each group, ie 8 groups per sublevel. */
+#define TDB_HASH_GROUP_BITS 3
+/* This is currently 10: beyond this we chain. */
+#define TDB_MAX_LEVELS (1+(64-TDB_TOPLEVEL_HASH_BITS) / TDB_SUBLEVEL_HASH_BITS)
+
+/* Extend file by least 100 times larger than needed. */
+#define TDB_EXTENSION_FACTOR 100
+
+/* We steal bits from the offsets to store hash info. */
+#define TDB_OFF_HASH_GROUP_MASK ((1ULL << TDB_HASH_GROUP_BITS) - 1)
+/* We steal this many upper bits, giving a maximum offset of 64 exabytes. */
+#define TDB_OFF_UPPER_STEAL 8
+#define   TDB_OFF_UPPER_STEAL_EXTRA 7
+/* The bit number where we store extra hash bits. */
+#define TDB_OFF_HASH_EXTRA_BIT 57
+#define TDB_OFF_UPPER_STEAL_SUBHASH_BIT 56
+
+/* Additional features we understand.  Currently: none. */
+#define TDB_FEATURE_MASK ((uint64_t)0)
+
+/* The bit number where we store the extra hash bits. */
+/* Convenience mask to get actual offset. */
+#define TDB_OFF_MASK \
+	(((1ULL << (64 - TDB_OFF_UPPER_STEAL)) - 1) - TDB_OFF_HASH_GROUP_MASK)
+
+/* How many buckets in a free list: see size_to_bucket(). */
+#define TDB_FREE_BUCKETS (64 - TDB_OFF_UPPER_STEAL)
+
+/* We have to be able to fit a free record here. */
+#define TDB_MIN_DATA_LEN	\
+	(sizeof(struct tdb_free_record) - sizeof(struct tdb_used_record))
+
+/* Indicates this entry is not on an flist (can happen during coalescing) */
+#define TDB_FTABLE_NONE ((1ULL << TDB_OFF_UPPER_STEAL) - 1)
+
+struct tdb_used_record {
+	/* For on-disk compatibility, we avoid bitfields:
+	   magic: 16,        (highest)
+	   key_len_bits: 5,
+	   extra_padding: 32
+	   hash_bits: 11
+	*/
+        uint64_t magic_and_meta;
+	/* The bottom key_len_bits*2 are key length, rest is data length. */
+        uint64_t key_and_data_len;
+};
+
+static inline unsigned rec_key_bits(const struct tdb_used_record *r)
+{
+	return ((r->magic_and_meta >> 43) & ((1 << 5)-1)) * 2;
+}
+
+static inline uint64_t rec_key_length(const struct tdb_used_record *r)
+{
+	return r->key_and_data_len & ((1ULL << rec_key_bits(r)) - 1);
+}
+
+static inline uint64_t rec_data_length(const struct tdb_used_record *r)
+{
+	return r->key_and_data_len >> rec_key_bits(r);
+}
+
+static inline uint64_t rec_extra_padding(const struct tdb_used_record *r)
+{
+	return (r->magic_and_meta >> 11) & 0xFFFFFFFF;
+}
+
+static inline uint32_t rec_hash(const struct tdb_used_record *r)
+{
+	return r->magic_and_meta & ((1 << 11) - 1);
+}
+
+static inline uint16_t rec_magic(const struct tdb_used_record *r)
+{
+	return (r->magic_and_meta >> 48);
+}
+
+struct tdb_free_record {
+        uint64_t magic_and_prev; /* TDB_OFF_UPPER_STEAL bits magic, then prev */
+        uint64_t ftable_and_len; /* Len not counting these two fields. */
+	/* This is why the minimum record size is 8 bytes.  */
+	uint64_t next;
+};
+
+static inline uint64_t frec_prev(const struct tdb_free_record *f)
+{
+	return f->magic_and_prev & ((1ULL << (64 - TDB_OFF_UPPER_STEAL)) - 1);
+}
+
+static inline uint64_t frec_magic(const struct tdb_free_record *f)
+{
+	return f->magic_and_prev >> (64 - TDB_OFF_UPPER_STEAL);
+}
+
+static inline uint64_t frec_len(const struct tdb_free_record *f)
+{
+	return f->ftable_and_len & ((1ULL << (64 - TDB_OFF_UPPER_STEAL))-1);
+}
+
+static inline unsigned frec_ftable(const struct tdb_free_record *f)
+{
+	return f->ftable_and_len >> (64 - TDB_OFF_UPPER_STEAL);
+}
+
+struct tdb_recovery_record {
+	uint64_t magic;
+	/* Length of record (add this header to get total length). */
+	uint64_t max_len;
+	/* Length used. */
+	uint64_t len;
+	/* Old length of file before transaction. */
+	uint64_t eof;
+};
+
+/* If we bottom out of the subhashes, we chain. */
+struct tdb_chain {
+	tdb_off_t rec[1 << TDB_HASH_GROUP_BITS];
+	tdb_off_t next;
+};
+
+/* this is stored at the front of every database */
+struct tdb_header {
+	char magic_food[64]; /* for /etc/magic */
+	/* FIXME: Make me 32 bit? */
+	uint64_t version; /* version of the code */
+	uint64_t hash_test; /* result of hashing HASH_MAGIC. */
+	uint64_t hash_seed; /* "random" seed written at creation time. */
+	tdb_off_t free_table; /* (First) free table. */
+	tdb_off_t recovery; /* Transaction recovery area. */
+
+	uint64_t features_used; /* Features all writers understand */
+	uint64_t features_offered; /* Features offered */
+
+	uint64_t seqnum; /* Sequence number for TDB_SEQNUM */
+
+	tdb_off_t reserved[23];
+
+	/* Top level hash table. */
+	tdb_off_t hashtable[1ULL << TDB_TOPLEVEL_HASH_BITS];
+};
+
+struct tdb_freetable {
+	struct tdb_used_record hdr;
+	tdb_off_t next;
+	tdb_off_t buckets[TDB_FREE_BUCKETS];
+};
+
+/* Information about a particular (locked) hash entry. */
+struct hash_info {
+	/* Full hash value of entry. */
+	uint64_t h;
+	/* Start and length of lock acquired. */
+	tdb_off_t hlock_start;
+	tdb_len_t hlock_range;
+	/* Start of hash group. */
+	tdb_off_t group_start;
+	/* Bucket we belong in. */
+	unsigned int home_bucket;
+	/* Bucket we (or an empty space) were found in. */
+	unsigned int found_bucket;
+	/* How many bits of the hash are already used. */
+	unsigned int hash_used;
+	/* Current working group. */
+	tdb_off_t group[1 << TDB_HASH_GROUP_BITS];
+};
+
+struct traverse_info {
+	struct traverse_level {
+		tdb_off_t hashtable;
+		/* We ignore groups here, and treat it as a big array. */
+		unsigned entry;
+		unsigned int total_buckets;
+	} levels[TDB_MAX_LEVELS + 1];
+	unsigned int num_levels;
+	unsigned int toplevel_group;
+	/* This makes delete-everything-inside-traverse work as expected. */
+	tdb_off_t prev;
+};
+
+enum tdb_lock_flags {
+	/* WAIT == F_SETLKW, NOWAIT == F_SETLK */
+	TDB_LOCK_NOWAIT = 0,
+	TDB_LOCK_WAIT = 1,
+	/* If set, don't log an error on failure. */
+	TDB_LOCK_PROBE = 2,
+	/* If set, don't check for recovery (used by recovery code). */
+	TDB_LOCK_NOCHECK = 4,
+};
+
+struct tdb_lock {
+	struct tdb_context *owner;
+	uint32_t off;
+	uint32_t count;
+	uint32_t ltype;
+};
+
+/* This is only needed for tdb_access_commit, but used everywhere to
+ * simplify. */
+struct tdb_access_hdr {
+	struct tdb_access_hdr *next;
+	tdb_off_t off;
+	tdb_len_t len;
+	bool convert;
+};
+
+struct tdb_file {
+	/* Single list of all TDBs, to detect multiple opens. */
+	struct tdb_file *next;
+
+	/* How many are sharing us? */
+	unsigned int refcnt;
+
+	/* Mmap (if any), or malloc (for TDB_INTERNAL). */
+	void *map_ptr;
+
+	/* How much space has been mapped (<= current file size) */
+	tdb_len_t map_size;
+
+	/* The file descriptor (-1 for TDB_INTERNAL). */
+	int fd;
+
+	/* Lock information */
+	pid_t locker;
+	struct tdb_lock allrecord_lock;
+	size_t num_lockrecs;
+	struct tdb_lock *lockrecs;
+
+	/* Identity of this file. */
+	dev_t device;
+	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;
+
+	/* mmap read only? */
+	int mmap_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,
+		       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);
+	enum TDB_ERROR (*twrite)(struct tdb_context *, tdb_off_t, const void *,
+				 tdb_len_t);
+	enum TDB_ERROR (*oob)(struct tdb_context *, tdb_off_t, bool);
+	enum TDB_ERROR (*expand_file)(struct tdb_context *, tdb_len_t);
+	void *(*direct)(struct tdb_context *, tdb_off_t, size_t, bool);
+};
+
+/*
+  internal prototypes
+*/
+/* hash.c: */
+tdb_bool_err first_in_hash(struct tdb_context *tdb,
+			   struct traverse_info *tinfo,
+			   TDB_DATA *kbuf, size_t *dlen);
+
+tdb_bool_err next_in_hash(struct tdb_context *tdb,
+			  struct traverse_info *tinfo,
+			  TDB_DATA *kbuf, size_t *dlen);
+
+/* Hash random memory. */
+uint64_t tdb_hash(struct tdb_context *tdb, const void *ptr, size_t len);
+
+/* Hash on disk. */
+uint64_t hash_record(struct tdb_context *tdb, tdb_off_t off);
+
+/* Find and lock a hash entry (or where it would be). */
+tdb_off_t find_and_lock(struct tdb_context *tdb,
+			struct tdb_data key,
+			int ltype,
+			struct hash_info *h,
+			struct tdb_used_record *rec,
+			struct traverse_info *tinfo);
+
+enum TDB_ERROR replace_in_hash(struct tdb_context *tdb,
+			       struct hash_info *h,
+			       tdb_off_t new_off);
+
+enum TDB_ERROR add_to_hash(struct tdb_context *tdb, struct hash_info *h,
+			   tdb_off_t new_off);
+
+enum TDB_ERROR delete_from_hash(struct tdb_context *tdb, struct hash_info *h);
+
+/* For tdb_check */
+bool is_subhash(tdb_off_t val);
+
+/* free.c: */
+enum TDB_ERROR tdb_ftable_init(struct tdb_context *tdb);
+
+/* check.c needs these to iterate through free lists. */
+tdb_off_t first_ftable(struct tdb_context *tdb);
+tdb_off_t next_ftable(struct tdb_context *tdb, tdb_off_t ftable);
+
+/* This returns space or -ve error number. */
+tdb_off_t alloc(struct tdb_context *tdb, size_t keylen, size_t datalen,
+		uint64_t hash, unsigned magic, bool growing);
+
+/* Put this record in a free list. */
+enum TDB_ERROR add_free_record(struct tdb_context *tdb,
+			       tdb_off_t off, tdb_len_t len_with_header,
+			       enum tdb_lock_flags waitflag,
+			       bool coalesce_ok);
+
+/* Set up header for a used/ftable/htable/chain record. */
+enum TDB_ERROR set_header(struct tdb_context *tdb,
+			  struct tdb_used_record *rec,
+			  unsigned magic, uint64_t keylen, uint64_t datalen,
+			  uint64_t actuallen, unsigned hashlow);
+
+/* Used by tdb_check to verify. */
+unsigned int size_to_bucket(tdb_len_t data_len);
+tdb_off_t bucket_off(tdb_off_t ftable_off, unsigned bucket);
+
+/* Used by tdb_summary */
+tdb_off_t dead_space(struct tdb_context *tdb, tdb_off_t off);
+
+/* io.c: */
+/* Initialize tdb->methods. */
+void tdb_io_init(struct tdb_context *tdb);
+
+/* Convert endian of the buffer if required. */
+void *tdb_convert(const struct tdb_context *tdb, void *buf, tdb_len_t size);
+
+/* Unmap and try to map the tdb. */
+void tdb_munmap(struct tdb_file *file);
+void tdb_mmap(struct tdb_context *tdb);
+
+/* Either alloc a copy, or give direct access.  Release frees or noop. */
+const void *tdb_access_read(struct tdb_context *tdb,
+			    tdb_off_t off, tdb_len_t len, bool convert);
+void *tdb_access_write(struct tdb_context *tdb,
+		       tdb_off_t off, tdb_len_t len, bool convert);
+
+/* Release result of tdb_access_read/write. */
+void tdb_access_release(struct tdb_context *tdb, const void *p);
+/* Commit result of tdb_acces_write. */
+enum TDB_ERROR tdb_access_commit(struct tdb_context *tdb, void *p);
+
+/* Convenience routine to get an offset. */
+tdb_off_t tdb_read_off(struct tdb_context *tdb, tdb_off_t off);
+
+/* Write an offset at an offset. */
+enum TDB_ERROR tdb_write_off(struct tdb_context *tdb, tdb_off_t off,
+			     tdb_off_t val);
+
+/* Clear an ondisk area. */
+enum TDB_ERROR zero_out(struct tdb_context *tdb, tdb_off_t off, tdb_len_t len);
+
+/* Return a non-zero offset between >= start < end in this array (or end). */
+tdb_off_t tdb_find_nonzero_off(struct tdb_context *tdb,
+			       tdb_off_t base,
+			       uint64_t start,
+			       uint64_t end);
+
+/* Return a zero offset in this array, or num. */
+tdb_off_t tdb_find_zero_off(struct tdb_context *tdb, tdb_off_t off,
+			    uint64_t num);
+
+/* Allocate and make a copy of some offset. */
+void *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len);
+
+/* Writes a converted copy of a record. */
+enum TDB_ERROR tdb_write_convert(struct tdb_context *tdb, tdb_off_t off,
+				 const void *rec, size_t len);
+
+/* Reads record and converts it */
+enum TDB_ERROR tdb_read_convert(struct tdb_context *tdb, tdb_off_t off,
+				void *rec, size_t len);
+
+/* Bump the seqnum (caller checks for tdb->flags & TDB_SEQNUM) */
+void tdb_inc_seqnum(struct tdb_context *tdb);
+
+/* lock.c: */
+/* Lock/unlock a range of hashes. */
+enum TDB_ERROR tdb_lock_hashes(struct tdb_context *tdb,
+			       tdb_off_t hash_lock, tdb_len_t hash_range,
+			       int ltype, enum tdb_lock_flags waitflag);
+enum TDB_ERROR tdb_unlock_hashes(struct tdb_context *tdb,
+				 tdb_off_t hash_lock,
+				 tdb_len_t hash_range, int ltype);
+
+/* For closing the file. */
+void tdb_lock_cleanup(struct tdb_context *tdb);
+
+/* Lock/unlock a particular free bucket. */
+enum TDB_ERROR tdb_lock_free_bucket(struct tdb_context *tdb, tdb_off_t b_off,
+				    enum tdb_lock_flags waitflag);
+void tdb_unlock_free_bucket(struct tdb_context *tdb, tdb_off_t b_off);
+
+/* Serialize transaction start. */
+enum TDB_ERROR tdb_transaction_lock(struct tdb_context *tdb, int ltype);
+void tdb_transaction_unlock(struct tdb_context *tdb, int ltype);
+
+/* Do we have any hash locks (ie. via tdb_chainlock) ? */
+bool tdb_has_hash_locks(struct tdb_context *tdb);
+
+/* Lock entire database. */
+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);
+
+/* Serialize db open. */
+enum TDB_ERROR tdb_lock_open(struct tdb_context *tdb,
+			     int ltype, enum tdb_lock_flags flags);
+void tdb_unlock_open(struct tdb_context *tdb, int ltype);
+bool tdb_has_open_lock(struct tdb_context *tdb);
+
+/* Serialize db expand. */
+enum TDB_ERROR tdb_lock_expand(struct tdb_context *tdb, int ltype);
+void tdb_unlock_expand(struct tdb_context *tdb, int ltype);
+bool tdb_has_expansion_lock(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);
+
+/* 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 *);
+
+/* transaction.c: */
+enum TDB_ERROR tdb_transaction_recover(struct tdb_context *tdb);
+tdb_bool_err tdb_needs_recovery(struct tdb_context *tdb);
+
+/* tdb.c: */
+enum TDB_ERROR COLD tdb_logerr(struct tdb_context *tdb,
+			       enum TDB_ERROR ecode,
+			       enum tdb_log_level level,
+			       const char *fmt, ...);
+
+#ifdef TDB_TRACE
+void tdb_trace(struct tdb_context *tdb, const char *op);
+void tdb_trace_seqnum(struct tdb_context *tdb, uint32_t seqnum, const char *op);
+void tdb_trace_open(struct tdb_context *tdb, const char *op,
+		    unsigned hash_size, unsigned tdb_flags, unsigned open_flags);
+void tdb_trace_ret(struct tdb_context *tdb, const char *op, int ret);
+void tdb_trace_retrec(struct tdb_context *tdb, const char *op, TDB_DATA ret);
+void tdb_trace_1rec(struct tdb_context *tdb, const char *op,
+		    TDB_DATA rec);
+void tdb_trace_1rec_ret(struct tdb_context *tdb, const char *op,
+			TDB_DATA rec, int ret);
+void tdb_trace_1rec_retrec(struct tdb_context *tdb, const char *op,
+			   TDB_DATA rec, TDB_DATA ret);
+void tdb_trace_2rec_flag_ret(struct tdb_context *tdb, const char *op,
+			     TDB_DATA rec1, TDB_DATA rec2, unsigned flag,
+			     int ret);
+void tdb_trace_2rec_retrec(struct tdb_context *tdb, const char *op,
+			   TDB_DATA rec1, TDB_DATA rec2, TDB_DATA ret);
+#else
+#define tdb_trace(tdb, op)
+#define tdb_trace_seqnum(tdb, seqnum, op)
+#define tdb_trace_open(tdb, op, hash_size, tdb_flags, open_flags)
+#define tdb_trace_ret(tdb, op, ret)
+#define tdb_trace_retrec(tdb, op, ret)
+#define tdb_trace_1rec(tdb, op, rec)
+#define tdb_trace_1rec_ret(tdb, op, rec, ret)
+#define tdb_trace_1rec_retrec(tdb, op, rec, ret)
+#define tdb_trace_2rec_flag_ret(tdb, op, rec1, rec2, flag, ret)
+#define tdb_trace_2rec_retrec(tdb, op, rec1, rec2, ret)
+#endif /* !TDB_TRACE */
+
+#endif