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samba-mirror/lib/ntdb/private.h
Rusty Russell 0a34f342c3 ntdb: enhancement to allow direct access to the ntdb map during expansion.
This means keeping the old mmap around when we expand the database.
We could revert to read/write, except for platforms with incoherent
mmap (ie. OpenBSD), where we need to use mmap for all accesses.

Thus we keep a linked list of old maps, and unmap them when the last access
finally goes away.

This is required if we want ntdb_parse_record() callbacks to be able
to expand the database.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-06-22 07:35:17 +02:00

673 lines
20 KiB
C

#ifndef NTDB_PRIVATE_H
#define NTDB_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"
#ifndef HAVE_CCAN
#error You need ccan to build ntdb!
#endif
#include "ntdb.h"
#include <ccan/compiler/compiler.h>
#include <ccan/likely/likely.h>
#include <ccan/endian/endian.h>
#ifdef HAVE_LIBREPLACE
#include "replace.h"
#include "system/filesys.h"
#include "system/time.h"
#include "system/shmem.h"
#include "system/select.h"
#include "system/wait.h"
#else
#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 <errno.h>
#include <stdio.h>
#include <utime.h>
#include <unistd.h>
#endif
#include <assert.h>
#ifndef TEST_IT
#define TEST_IT(cond)
#endif
/* #define NTDB_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 ntdb_len_t;
typedef uint64_t ntdb_off_t;
#define NTDB_MAGIC_FOOD "NTDB file\n"
#define NTDB_VERSION ((uint64_t)(0x26011967 + 7))
#define NTDB_USED_MAGIC ((uint64_t)0x1999)
#define NTDB_HTABLE_MAGIC ((uint64_t)0x1888)
#define NTDB_CHAIN_MAGIC ((uint64_t)0x1777)
#define NTDB_FTABLE_MAGIC ((uint64_t)0x1666)
#define NTDB_CAP_MAGIC ((uint64_t)0x1555)
#define NTDB_FREE_MAGIC ((uint64_t)0xFE)
#define NTDB_HASH_MAGIC (0xA1ABE11A01092008ULL)
#define NTDB_RECOVERY_MAGIC (0xf53bc0e7ad124589ULL)
#define NTDB_RECOVERY_INVALID_MAGIC (0x0ULL)
/* Capability bits. */
#define NTDB_CAP_TYPE_MASK 0x1FFFFFFFFFFFFFFFULL
#define NTDB_CAP_NOCHECK 0x8000000000000000ULL
#define NTDB_CAP_NOWRITE 0x4000000000000000ULL
#define NTDB_CAP_NOOPEN 0x2000000000000000ULL
#define NTDB_OFF_IS_ERR(off) unlikely(off >= (ntdb_off_t)(long)NTDB_ERR_LAST)
#define NTDB_OFF_TO_ERR(off) ((enum NTDB_ERROR)(long)(off))
#define NTDB_ERR_TO_OFF(ecode) ((ntdb_off_t)(long)(ecode))
/* Packing errors into pointers and v.v. */
#define NTDB_PTR_IS_ERR(ptr) \
unlikely((unsigned long)(ptr) >= (unsigned long)NTDB_ERR_LAST)
#define NTDB_PTR_ERR(p) ((enum NTDB_ERROR)(long)(p))
#define NTDB_ERR_PTR(err) ((void *)(long)(err))
/* This doesn't really need to be pagesize, but we use it for similar
* reasons. */
#define NTDB_PGSIZE 16384
/* Common case of returning true, false or -ve error. */
typedef int ntdb_bool_err;
/* Prevent others from opening the file. */
#define NTDB_OPEN_LOCK 0
/* Expanding file. */
#define NTDB_EXPANSION_LOCK 2
/* Doing a transaction. */
#define NTDB_TRANSACTION_LOCK 8
/* Hash chain locks. */
#define NTDB_HASH_LOCK_START 64
/* Extend file by least 100 times larger than needed. */
#define NTDB_EXTENSION_FACTOR 100
/* We steal this many upper bits, giving a maximum offset of 64 exabytes. */
#define NTDB_OFF_UPPER_STEAL 8
/* And we use the lower bit, too. */
#define NTDB_OFF_CHAIN_BIT 0
/* Hash table sits just after the header. */
#define NTDB_HASH_OFFSET (sizeof(struct ntdb_header))
/* Additional features we understand. Currently: none. */
#define NTDB_FEATURE_MASK ((uint64_t)0)
/* The bit number where we store the extra hash bits. */
/* Convenience mask to get actual offset. */
#define NTDB_OFF_MASK \
(((1ULL << (64 - NTDB_OFF_UPPER_STEAL)) - 1) - (1<<NTDB_OFF_CHAIN_BIT))
/* How many buckets in a free list: see size_to_bucket(). */
#define NTDB_FREE_BUCKETS (64 - NTDB_OFF_UPPER_STEAL)
/* We have to be able to fit a free record here. */
#define NTDB_MIN_DATA_LEN \
(sizeof(struct ntdb_free_record) - sizeof(struct ntdb_used_record))
/* Indicates this entry is not on an flist (can happen during coalescing) */
#define NTDB_FTABLE_NONE ((1ULL << NTDB_OFF_UPPER_STEAL) - 1)
/* By default, hash is 64k bytes */
#define NTDB_DEFAULT_HBITS 13
struct ntdb_used_record {
/* For on-disk compatibility, we avoid bitfields:
magic: 16, (highest)
key_len_bits: 5,
extra_padding: 32
*/
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 ntdb_used_record *r)
{
return ((r->magic_and_meta >> 43) & ((1 << 5)-1)) * 2;
}
static inline uint64_t rec_key_length(const struct ntdb_used_record *r)
{
return r->key_and_data_len & ((1ULL << rec_key_bits(r)) - 1);
}
static inline uint64_t rec_data_length(const struct ntdb_used_record *r)
{
return r->key_and_data_len >> rec_key_bits(r);
}
static inline uint64_t rec_extra_padding(const struct ntdb_used_record *r)
{
return (r->magic_and_meta >> 11) & 0xFFFFFFFF;
}
static inline uint16_t rec_magic(const struct ntdb_used_record *r)
{
return (r->magic_and_meta >> 48);
}
struct ntdb_free_record {
uint64_t magic_and_prev; /* NTDB_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 ntdb_free_record *f)
{
return f->magic_and_prev & ((1ULL << (64 - NTDB_OFF_UPPER_STEAL)) - 1);
}
static inline uint64_t frec_magic(const struct ntdb_free_record *f)
{
return f->magic_and_prev >> (64 - NTDB_OFF_UPPER_STEAL);
}
static inline uint64_t frec_len(const struct ntdb_free_record *f)
{
return f->ftable_and_len & ((1ULL << (64 - NTDB_OFF_UPPER_STEAL))-1);
}
static inline unsigned frec_ftable(const struct ntdb_free_record *f)
{
return f->ftable_and_len >> (64 - NTDB_OFF_UPPER_STEAL);
}
struct ntdb_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;
};
/* this is stored at the front of every database */
struct ntdb_header {
char magic_food[64]; /* for /etc/magic */
/* FIXME: Make me 32 bit? */
uint64_t version; /* version of the code */
uint64_t hash_bits; /* bits for toplevel hash table. */
uint64_t hash_test; /* result of hashing HASH_MAGIC. */
uint64_t hash_seed; /* "random" seed written at creation time. */
ntdb_off_t free_table; /* (First) free table. */
ntdb_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 NTDB_SEQNUM */
ntdb_off_t capabilities; /* Optional linked list of capabilities. */
ntdb_off_t reserved[22];
/*
* Hash table is next:
*
* struct ntdb_used_record htable_hdr;
* ntdb_off_t htable[1 << hash_bits];
*/
};
struct ntdb_freetable {
struct ntdb_used_record hdr;
ntdb_off_t next;
ntdb_off_t buckets[NTDB_FREE_BUCKETS];
};
struct ntdb_capability {
struct ntdb_used_record hdr;
ntdb_off_t type;
ntdb_off_t next;
/* ... */
};
/* Information about a particular (locked) hash entry. */
struct hash_info {
/* Full hash value of entry. */
uint32_t h;
/* Start of hash table / chain. */
ntdb_off_t table;
/* Number of entries in this table/chain. */
ntdb_off_t table_size;
/* Bucket we (or an empty space) were found in. */
ntdb_off_t bucket;
/* Old value that was in that entry (if not found) */
ntdb_off_t old_val;
};
enum ntdb_lock_flags {
/* WAIT == F_SETLKW, NOWAIT == F_SETLK */
NTDB_LOCK_NOWAIT = 0,
NTDB_LOCK_WAIT = 1,
/* If set, don't log an error on failure. */
NTDB_LOCK_PROBE = 2,
/* If set, don't check for recovery (used by recovery code). */
NTDB_LOCK_NOCHECK = 4,
};
struct ntdb_lock {
struct ntdb_context *owner;
off_t off;
uint32_t count;
uint32_t ltype;
};
/* This is only needed for ntdb_access_commit, but used everywhere to
* simplify. */
struct ntdb_access_hdr {
struct ntdb_access_hdr *next;
ntdb_off_t off;
ntdb_len_t len;
bool convert;
};
/* mmaps we are keeping around because they are still direct accessed */
struct ntdb_old_mmap {
struct ntdb_old_mmap *next;
void *map_ptr;
ntdb_len_t map_size;
};
struct ntdb_file {
/* How many are sharing us? */
unsigned int refcnt;
/* Mmap (if any), or malloc (for NTDB_INTERNAL). */
void *map_ptr;
/* How much space has been mapped (<= current file size) */
ntdb_len_t map_size;
/* The file descriptor (-1 for NTDB_INTERNAL). */
int fd;
/* How many are accessing directly? */
unsigned int direct_count;
/* Old maps, still direct accessed. */
struct ntdb_old_mmap *old_mmaps;
/* Lock information */
pid_t locker;
struct ntdb_lock allrecord_lock;
size_t num_lockrecs;
struct ntdb_lock *lockrecs;
/* Identity of this file. */
dev_t device;
ino_t inode;
};
struct ntdb_methods {
enum NTDB_ERROR (*tread)(struct ntdb_context *, ntdb_off_t, void *,
ntdb_len_t);
enum NTDB_ERROR (*twrite)(struct ntdb_context *, ntdb_off_t, const void *,
ntdb_len_t);
enum NTDB_ERROR (*oob)(struct ntdb_context *, ntdb_off_t, ntdb_len_t, bool);
enum NTDB_ERROR (*expand_file)(struct ntdb_context *, ntdb_len_t);
void *(*direct)(struct ntdb_context *, ntdb_off_t, size_t, bool);
ntdb_off_t (*read_off)(struct ntdb_context *ntdb, ntdb_off_t off);
enum NTDB_ERROR (*write_off)(struct ntdb_context *ntdb, ntdb_off_t off,
ntdb_off_t val);
};
/*
internal prototypes
*/
/* Get bits from a value. */
static inline uint32_t bits_from(uint64_t val, unsigned start, unsigned num)
{
assert(num <= 32);
return (val >> start) & ((1U << num) - 1);
}
/* hash.c: */
uint32_t ntdb_jenkins_hash(const void *key, size_t length, uint32_t seed,
void *unused);
enum NTDB_ERROR first_in_hash(struct ntdb_context *ntdb,
struct hash_info *h,
NTDB_DATA *kbuf, size_t *dlen);
enum NTDB_ERROR next_in_hash(struct ntdb_context *ntdb,
struct hash_info *h,
NTDB_DATA *kbuf, size_t *dlen);
/* Hash random memory. */
uint32_t ntdb_hash(struct ntdb_context *ntdb, const void *ptr, size_t len);
/* Find and lock a hash entry (or where it would be). */
ntdb_off_t find_and_lock(struct ntdb_context *ntdb,
NTDB_DATA key,
int ltype,
struct hash_info *h,
struct ntdb_used_record *rec,
const char **rkey);
enum NTDB_ERROR replace_in_hash(struct ntdb_context *ntdb,
const struct hash_info *h,
ntdb_off_t new_off);
enum NTDB_ERROR add_to_hash(struct ntdb_context *ntdb,
const struct hash_info *h,
ntdb_off_t new_off);
enum NTDB_ERROR delete_from_hash(struct ntdb_context *ntdb,
const struct hash_info *h);
/* For ntdb_check */
bool is_subhash(ntdb_off_t val);
enum NTDB_ERROR unknown_capability(struct ntdb_context *ntdb, const char *caller,
ntdb_off_t type);
/* free.c: */
enum NTDB_ERROR ntdb_ftable_init(struct ntdb_context *ntdb);
/* check.c needs these to iterate through free lists. */
ntdb_off_t first_ftable(struct ntdb_context *ntdb);
ntdb_off_t next_ftable(struct ntdb_context *ntdb, ntdb_off_t ftable);
/* This returns space or -ve error number. */
ntdb_off_t alloc(struct ntdb_context *ntdb, size_t keylen, size_t datalen,
unsigned magic, bool growing);
/* Put this record in a free list. */
enum NTDB_ERROR add_free_record(struct ntdb_context *ntdb,
ntdb_off_t off, ntdb_len_t len_with_header,
enum ntdb_lock_flags waitflag,
bool coalesce_ok);
/* Set up header for a used/ftable/htable/chain/capability record. */
enum NTDB_ERROR set_header(struct ntdb_context *ntdb,
struct ntdb_used_record *rec,
unsigned magic, uint64_t keylen, uint64_t datalen,
uint64_t actuallen);
/* Used by ntdb_check to verify. */
unsigned int size_to_bucket(ntdb_len_t data_len);
ntdb_off_t bucket_off(ntdb_off_t ftable_off, unsigned bucket);
/* Used by ntdb_summary */
ntdb_off_t dead_space(struct ntdb_context *ntdb, ntdb_off_t off);
/* Adjust expansion, used by create_recovery_area */
ntdb_off_t ntdb_expand_adjust(ntdb_off_t map_size, ntdb_off_t size);
/* io.c: */
/* Initialize ntdb->methods. */
void ntdb_io_init(struct ntdb_context *ntdb);
/* Convert endian of the buffer if required. */
void *ntdb_convert(const struct ntdb_context *ntdb, void *buf, ntdb_len_t size);
/* Unmap and try to map the ntdb. */
enum NTDB_ERROR ntdb_munmap(struct ntdb_context *ntdb);
enum NTDB_ERROR ntdb_mmap(struct ntdb_context *ntdb);
/* Either alloc a copy, or give direct access. Release frees or noop. */
const void *ntdb_access_read(struct ntdb_context *ntdb,
ntdb_off_t off, ntdb_len_t len, bool convert);
void *ntdb_access_write(struct ntdb_context *ntdb,
ntdb_off_t off, ntdb_len_t len, bool convert);
/* Release result of ntdb_access_read/write. */
void ntdb_access_release(struct ntdb_context *ntdb, const void *p);
/* Commit result of ntdb_acces_write. */
enum NTDB_ERROR ntdb_access_commit(struct ntdb_context *ntdb, void *p);
/* Clear an ondisk area. */
enum NTDB_ERROR zero_out(struct ntdb_context *ntdb, ntdb_off_t off, ntdb_len_t len);
/* Return a non-zero offset between >= start < end in this array (or end). */
ntdb_off_t ntdb_find_nonzero_off(struct ntdb_context *ntdb,
ntdb_off_t base,
uint64_t start,
uint64_t end);
/* Return a zero offset in this array, or num. */
ntdb_off_t ntdb_find_zero_off(struct ntdb_context *ntdb, ntdb_off_t off,
uint64_t num);
/* Allocate and make a copy of some offset. */
void *ntdb_alloc_read(struct ntdb_context *ntdb, ntdb_off_t offset, ntdb_len_t len);
/* Writes a converted copy of a record. */
enum NTDB_ERROR ntdb_write_convert(struct ntdb_context *ntdb, ntdb_off_t off,
const void *rec, size_t len);
/* Reads record and converts it */
enum NTDB_ERROR ntdb_read_convert(struct ntdb_context *ntdb, ntdb_off_t off,
void *rec, size_t len);
/* Bump the seqnum (caller checks for ntdb->flags & NTDB_SEQNUM) */
void ntdb_inc_seqnum(struct ntdb_context *ntdb);
/* lock.c: */
/* Print message because another ntdb owns a lock we want. */
enum NTDB_ERROR owner_conflict(struct ntdb_context *ntdb, const char *call);
/* If we fork, we no longer really own locks. */
bool check_lock_pid(struct ntdb_context *ntdb, const char *call, bool log);
/* Lock/unlock a hash bucket. */
enum NTDB_ERROR ntdb_lock_hash(struct ntdb_context *ntdb,
unsigned int hbucket,
int ltype);
enum NTDB_ERROR ntdb_unlock_hash(struct ntdb_context *ntdb,
unsigned int hash, int ltype);
/* For closing the file. */
void ntdb_lock_cleanup(struct ntdb_context *ntdb);
/* Lock/unlock a particular free bucket. */
enum NTDB_ERROR ntdb_lock_free_bucket(struct ntdb_context *ntdb, ntdb_off_t b_off,
enum ntdb_lock_flags waitflag);
void ntdb_unlock_free_bucket(struct ntdb_context *ntdb, ntdb_off_t b_off);
/* Serialize transaction start. */
enum NTDB_ERROR ntdb_transaction_lock(struct ntdb_context *ntdb, int ltype);
void ntdb_transaction_unlock(struct ntdb_context *ntdb, int ltype);
/* Do we have any hash locks (ie. via ntdb_chainlock) ? */
bool ntdb_has_hash_locks(struct ntdb_context *ntdb);
/* Lock entire database. */
enum NTDB_ERROR ntdb_allrecord_lock(struct ntdb_context *ntdb, int ltype,
enum ntdb_lock_flags flags, bool upgradable);
void ntdb_allrecord_unlock(struct ntdb_context *ntdb, int ltype);
enum NTDB_ERROR ntdb_allrecord_upgrade(struct ntdb_context *ntdb, off_t start);
/* Serialize db open. */
enum NTDB_ERROR ntdb_lock_open(struct ntdb_context *ntdb,
int ltype, enum ntdb_lock_flags flags);
void ntdb_unlock_open(struct ntdb_context *ntdb, int ltype);
bool ntdb_has_open_lock(struct ntdb_context *ntdb);
/* Serialize db expand. */
enum NTDB_ERROR ntdb_lock_expand(struct ntdb_context *ntdb, int ltype);
void ntdb_unlock_expand(struct ntdb_context *ntdb, int ltype);
bool ntdb_has_expansion_lock(struct ntdb_context *ntdb);
/* If it needs recovery, grab all the locks and do it. */
enum NTDB_ERROR ntdb_lock_and_recover(struct ntdb_context *ntdb);
/* Default lock and unlock functions. */
int ntdb_fcntl_lock(int fd, int rw, off_t off, off_t len, bool waitflag, void *);
int ntdb_fcntl_unlock(int fd, int rw, off_t off, off_t len, void *);
/* transaction.c: */
enum NTDB_ERROR ntdb_transaction_recover(struct ntdb_context *ntdb);
ntdb_bool_err ntdb_needs_recovery(struct ntdb_context *ntdb);
struct ntdb_context {
/* Single list of all TDBs, to detect multiple opens. */
struct ntdb_context *next;
/* Filename of the database. */
const char *name;
/* Logging function */
void (*log_fn)(struct ntdb_context *ntdb,
enum ntdb_log_level level,
enum NTDB_ERROR ecode,
const char *message,
void *data);
void *log_data;
/* Open flags passed to ntdb_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 ntdb flags passed to ntdb_open. */
uint32_t flags;
/* Our statistics. */
struct ntdb_attribute_stats stats;
/* The actual file information */
struct ntdb_file *file;
/* Hash function. */
uint32_t (*hash_fn)(const void *key, size_t len, uint32_t seed, void *);
void *hash_data;
uint32_t hash_seed;
/* Bits in toplevel hash table. */
unsigned int hash_bits;
/* Allocate and free functions. */
void *(*alloc_fn)(const void *owner, size_t len, void *priv_data);
void *(*expand_fn)(void *old, size_t newlen, void *priv_data);
void (*free_fn)(void *old, void *priv_data);
void *alloc_data;
/* Our open hook, if any. */
enum NTDB_ERROR (*openhook)(int fd, void *data);
void *openhook_data;
/* Set if we are in a transaction. */
struct ntdb_transaction *transaction;
/* What free table are we using? */
ntdb_off_t ftable_off;
unsigned int ftable;
/* IO methods: changes for transactions. */
const struct ntdb_methods *io;
/* Direct access information */
struct ntdb_access_hdr *access;
};
/* ntdb.c: */
enum NTDB_ERROR COLD PRINTF_FMT(4, 5)
ntdb_logerr(struct ntdb_context *ntdb,
enum NTDB_ERROR ecode,
enum ntdb_log_level level,
const char *fmt, ...);
static inline enum NTDB_ERROR ntdb_oob(struct ntdb_context *ntdb,
ntdb_off_t off, ntdb_len_t len,
bool probe)
{
if (likely(off + len >= off)
&& likely(off + len <= ntdb->file->map_size)
&& likely(!probe)) {
return NTDB_SUCCESS;
}
return ntdb->io->oob(ntdb, off, len, probe);
}
/* Convenience routine to get an offset. */
static inline ntdb_off_t ntdb_read_off(struct ntdb_context *ntdb,
ntdb_off_t off)
{
return ntdb->io->read_off(ntdb, off);
}
/* Write an offset at an offset. */
static inline enum NTDB_ERROR ntdb_write_off(struct ntdb_context *ntdb,
ntdb_off_t off,
ntdb_off_t val)
{
return ntdb->io->write_off(ntdb, off, val);
}
#ifdef NTDB_TRACE
void ntdb_trace(struct ntdb_context *ntdb, const char *op);
void ntdb_trace_seqnum(struct ntdb_context *ntdb, uint32_t seqnum, const char *op);
void ntdb_trace_open(struct ntdb_context *ntdb, const char *op,
unsigned hash_size, unsigned ntdb_flags, unsigned open_flags);
void ntdb_trace_ret(struct ntdb_context *ntdb, const char *op, int ret);
void ntdb_trace_retrec(struct ntdb_context *ntdb, const char *op, NTDB_DATA ret);
void ntdb_trace_1rec(struct ntdb_context *ntdb, const char *op,
NTDB_DATA rec);
void ntdb_trace_1rec_ret(struct ntdb_context *ntdb, const char *op,
NTDB_DATA rec, int ret);
void ntdb_trace_1rec_retrec(struct ntdb_context *ntdb, const char *op,
NTDB_DATA rec, NTDB_DATA ret);
void ntdb_trace_2rec_flag_ret(struct ntdb_context *ntdb, const char *op,
NTDB_DATA rec1, NTDB_DATA rec2, unsigned flag,
int ret);
void ntdb_trace_2rec_retrec(struct ntdb_context *ntdb, const char *op,
NTDB_DATA rec1, NTDB_DATA rec2, NTDB_DATA ret);
#else
#define ntdb_trace(ntdb, op)
#define ntdb_trace_seqnum(ntdb, seqnum, op)
#define ntdb_trace_open(ntdb, op, hash_size, ntdb_flags, open_flags)
#define ntdb_trace_ret(ntdb, op, ret)
#define ntdb_trace_retrec(ntdb, op, ret)
#define ntdb_trace_1rec(ntdb, op, rec)
#define ntdb_trace_1rec_ret(ntdb, op, rec, ret)
#define ntdb_trace_1rec_retrec(ntdb, op, rec, ret)
#define ntdb_trace_2rec_flag_ret(ntdb, op, rec1, rec2, flag, ret)
#define ntdb_trace_2rec_retrec(ntdb, op, rec1, rec2, ret)
#endif /* !NTDB_TRACE */
#endif