+++ /dev/null
-#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 <stdarg.h>
-#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>
-#include <ctype.h>
-#include <string.h>
-#include <sys/wait.h>
-#include <time.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
projects / ccan / blobdiff