--- /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