X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Fprivate.h;h=b60f33a0a2012224d9e3192090cad82dd1d76d64;hp=6b15636e6efa346996ea94e3ec17dad5e3b517c0;hb=a56db4a5cbf4346ec8a74322b5267d47b2590ed7;hpb=ebdd6451e2d7aa185e62a59fa2c72ffe36772d9a diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h index 6b15636e..b60f33a0 100644 --- a/ccan/tdb2/private.h +++ b/ccan/tdb2/private.h @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -35,6 +36,7 @@ #include "config.h" #include #include +#include #ifdef HAVE_BYTESWAP_H #include #endif @@ -60,19 +62,13 @@ typedef uint64_t tdb_len_t; typedef uint64_t tdb_off_t; -#ifndef offsetof -#define offsetof(t,f) ((unsigned int)&((t *)0)->f) -#endif - #define TDB_MAGIC_FOOD "TDB file\n" #define TDB_VERSION ((uint64_t)(0x26011967 + 7)) #define TDB_MAGIC ((uint64_t)0x1999) -#define TDB_FREE_MAGIC (~(uint64_t)TDB_MAGIC) +#define TDB_FREE_MAGIC ((uint64_t)0xFE) #define TDB_HASH_MAGIC (0xA1ABE11A01092008ULL) -#define TDB_RECOVERY_MAGIC (0xf53bc0e7U) -#define TDB_RECOVERY_INVALID_MAGIC (0x0) -#define TDB_EXTRA_HASHBITS (11) /* We steal 11 bits to stash hash info. */ -#define TDB_EXTRA_HASHBITS_NUM (3) +#define TDB_RECOVERY_MAGIC (0xf53bc0e7ad124589ULL) +#define TDB_RECOVERY_INVALID_MAGIC (0x0ULL) #define TDB_OFF_ERR ((tdb_off_t)-1) @@ -80,13 +76,50 @@ typedef uint64_t tdb_off_t; #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 2 - -/* We start wih 256 hash buckets, 10 free buckets. A 4k-sized zone. */ -#define INITIAL_HASH_BITS 8 -#define INITIAL_FREE_BUCKETS 10 -#define INITIAL_ZONE_BITS 12 +#define TDB_HASH_LOCK_START 3 + +/* 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 + +/* 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_FLIST_NONE ((1ULL << TDB_OFF_UPPER_STEAL) - 1) #if !HAVE_BSWAP_64 static inline uint64_t bswap_64(uint64_t x) @@ -106,8 +139,8 @@ struct tdb_used_record { /* For on-disk compatibility, we avoid bitfields: magic: 16, (highest) key_len_bits: 5, - hash:11, - extra_padding: 32 (lowest) + extra_padding: 32 + hash_bits: 11 */ uint64_t magic_and_meta; /* The bottom key_len_bits*2 are key length, rest is data length. */ @@ -131,12 +164,12 @@ static inline uint64_t rec_data_length(const struct tdb_used_record *r) static inline uint64_t rec_extra_padding(const struct tdb_used_record *r) { - return r->magic_and_meta & 0xFFFFFFFF; + return (r->magic_and_meta >> 11) & 0xFFFFFFFF; } -static inline uint64_t rec_hash(const struct tdb_used_record *r) +static inline uint32_t rec_hash(const struct tdb_used_record *r) { - return ((r->magic_and_meta >> 32) & ((1ULL << 11) - 1)) << (64 - 11); + return r->magic_and_meta & ((1 << 11) - 1); } static inline uint16_t rec_magic(const struct tdb_used_record *r) @@ -145,33 +178,100 @@ static inline uint16_t rec_magic(const struct tdb_used_record *r) } struct tdb_free_record { - uint64_t magic; - uint64_t data_len; /* Not counting these two fields. */ - /* This is why the minimum record size is 16 bytes. */ - uint64_t next, prev; + uint64_t magic_and_prev; /* TDB_OFF_UPPER_STEAL bits magic, then prev */ + uint64_t flist_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->flist_and_len & ((1ULL << (64 - TDB_OFF_UPPER_STEAL))-1); +} + +static inline unsigned frec_flist(const struct tdb_free_record *f) +{ + return f->flist_and_len >> (64 - TDB_OFF_UPPER_STEAL); +} + +struct tdb_recovery_record { + uint64_t magic; + /* Length of record. */ + uint64_t max_len; + /* Length used. */ + uint64_t len; + /* Old length of file before transaction. */ + uint64_t eof; }; -/* These parts can change while we have db open. */ -struct tdb_header_volatile { - uint64_t generation; /* Makes sure it changes on every update. */ - uint64_t hash_bits; /* Entries in hash table. */ - uint64_t hash_off; /* Offset of hash table. */ - uint64_t num_zones; /* How many zones in the file. */ - uint64_t zone_bits; /* Size of zones. */ - uint64_t free_buckets; /* How many buckets in each zone. */ - uint64_t free_off; /* Arrays of free entries. */ +/* 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[32]; /* for /etc/magic */ + 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_list; /* (First) free list. */ + tdb_off_t recovery; /* Transaction recovery area. */ - struct tdb_header_volatile v; + tdb_off_t reserved[26]; - tdb_off_t reserved[19]; + /* Top level hash table. */ + tdb_off_t hashtable[1ULL << TDB_TOPLEVEL_HASH_BITS]; +}; + +struct tdb_freelist { + 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 { @@ -180,6 +280,8 @@ enum tdb_lock_flags { 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_type { @@ -195,48 +297,53 @@ struct tdb_context { /* Mmap (if any), or malloc (for TDB_INTERNAL). */ void *map_ptr; + /* Are we accessing directly? (debugging check). */ + int direct_access; + /* Open file descriptor (undefined for TDB_INTERNAL). */ int fd; /* How much space has been mapped (<= current file size) */ tdb_len_t map_size; - /* Opened read-only? */ + /* Operating read-only? (Opened O_RDONLY, or in traverse_read) */ bool read_only; + /* mmap read only? */ + int mmap_flags; + /* Error code for last tdb error. */ enum TDB_ERROR ecode; - /* A cached copy of the header */ - struct tdb_header header; - /* (for debugging). */ - bool header_uptodate; - /* the flags passed to tdb_open, for tdb_reopen. */ uint32_t flags; /* Logging function */ - tdb_logfn_t log; - void *log_priv; + tdb_logfn_t logfn; + void *log_private; /* Hash function. */ tdb_hashfn_t khash; void *hash_priv; + uint64_t hash_seed; - /* What zone of the tdb to use, for spreading load. */ - uint64_t last_zone; + /* Set if we are in a transaction. */ + struct tdb_transaction *transaction; + + /* What freelist are we using? */ + uint64_t flist_off; + unsigned int flist; /* IO methods: changes for transactions. */ const struct tdb_methods *methods; /* Lock information */ struct tdb_lock_type allrecord_lock; - uint64_t num_lockrecs; + size_t num_lockrecs; struct tdb_lock_type *lockrecs; - /* Set if we are in a transaction. */ - struct tdb_transaction *transaction; - + struct tdb_attribute_stats *stats; + /* Single list of all TDBs, to avoid multiple opens. */ struct tdb_context *next; dev_t device; @@ -247,22 +354,48 @@ struct tdb_methods { int (*read)(struct tdb_context *, tdb_off_t, void *, tdb_len_t); int (*write)(struct tdb_context *, tdb_off_t, const void *, tdb_len_t); int (*oob)(struct tdb_context *, tdb_off_t, bool); - int (*expand_file)(struct tdb_context *, tdb_len_t, tdb_len_t); + int (*expand_file)(struct tdb_context *, tdb_len_t); + void *(*direct)(struct tdb_context *, tdb_off_t, size_t, bool); }; /* internal prototypes */ -/* tdb.c: */ -/* Returns true if header changed. */ -bool update_header(struct tdb_context *tdb); +/* hash.c: */ +void tdb_hash_init(struct tdb_context *tdb); /* 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); + +int replace_in_hash(struct tdb_context *tdb, + struct hash_info *h, + tdb_off_t new_off); + +int add_to_hash(struct tdb_context *tdb, struct hash_info *h, + tdb_off_t new_off); + +int delete_from_hash(struct tdb_context *tdb, struct hash_info *h); + +/* For tdb_check */ +bool is_subhash(tdb_off_t val); /* free.c: */ -uint64_t random_free_zone(struct tdb_context *tdb); +int tdb_flist_init(struct tdb_context *tdb); + +/* check.c needs these to iterate through free lists. */ +tdb_off_t first_flist(struct tdb_context *tdb); +tdb_off_t next_flist(struct tdb_context *tdb, tdb_off_t flist); /* If this fails, try tdb_expand. */ tdb_off_t alloc(struct tdb_context *tdb, size_t keylen, size_t datalen, @@ -273,14 +406,17 @@ int add_free_record(struct tdb_context *tdb, tdb_off_t off, tdb_len_t len_with_header); /* Set up header for a used record. */ -int set_header(struct tdb_context *tdb, - struct tdb_used_record *rec, - uint64_t keylen, uint64_t datalen, - uint64_t actuallen, uint64_t hash); +int set_used_header(struct tdb_context *tdb, + struct tdb_used_record *rec, + uint64_t keylen, uint64_t datalen, + uint64_t actuallen, unsigned hashlow); /* Used by tdb_check to verify. */ -unsigned int size_to_bucket(struct tdb_context *tdb, tdb_len_t data_len); -tdb_off_t zone_of(struct tdb_context *tdb, tdb_off_t off); +unsigned int size_to_bucket(tdb_len_t data_len); +tdb_off_t bucket_off(tdb_off_t flist_off, unsigned bucket); + +/* Used by tdb_summary */ +size_t dead_space(struct tdb_context *tdb, tdb_off_t off); /* io.c: */ /* Initialize tdb->methods. */ @@ -293,21 +429,19 @@ void *tdb_convert(const struct tdb_context *tdb, void *buf, tdb_len_t size); void tdb_munmap(struct tdb_context *tdb); void tdb_mmap(struct tdb_context *tdb); -/* Hand data to a function, direct if possible */ -int tdb_parse_data(struct tdb_context *tdb, TDB_DATA key, - tdb_off_t offset, tdb_len_t len, - int (*parser)(TDB_DATA key, TDB_DATA data, - void *private_data), - void *private_data); - -/* Either make a copy into pad and return that, or return ptr into mmap. - * Converts endian (ie. will use pad in that case). */ -void *tdb_get(struct tdb_context *tdb, tdb_off_t off, void *pad, size_t len); - /* 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); + 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); + +/* Is this pointer direct? (Otherwise it's malloced) */ +bool is_direct(const struct tdb_context *tdb, const void *p); + +/* Release result of tdb_access_read/write. */ void tdb_access_release(struct tdb_context *tdb, const void *p); +/* Commit result of tdb_acces_write. */ +int 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); @@ -318,9 +452,11 @@ int tdb_write_off(struct tdb_context *tdb, tdb_off_t off, tdb_off_t val); /* Clear an ondisk area. */ int zero_out(struct tdb_context *tdb, tdb_off_t off, tdb_len_t len); -/* Return a non-zero offset in this array, or num. */ -tdb_off_t tdb_find_nonzero_off(struct tdb_context *tdb, tdb_off_t off, - uint64_t num); +/* 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, @@ -334,95 +470,81 @@ bool tdb_read_all(int fd, void *buf, size_t len); /* Allocate and make a copy of some offset. */ void *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len); -/* Munges record and writes it */ +/* Writes a converted copy of a record. */ int tdb_write_convert(struct tdb_context *tdb, tdb_off_t off, - void *rec, size_t len); + const void *rec, size_t len); /* Reads record and converts it */ int tdb_read_convert(struct tdb_context *tdb, tdb_off_t off, void *rec, size_t len); -/* Hash on disk. */ -uint64_t hash_record(struct tdb_context *tdb, tdb_off_t off); +/* Adds a stat, if it's in range. */ +void add_stat_(struct tdb_context *tdb, uint64_t *stat, size_t val); +#define add_stat(tdb, statname, val) \ + do { \ + if (unlikely((tdb)->stats)) \ + add_stat_((tdb), &(tdb)->stats->statname, (val)); \ + } while (0) /* lock.c: */ -/* Lock/unlock a particular hash list. */ -int tdb_lock_list(struct tdb_context *tdb, tdb_off_t list, - int ltype, enum tdb_lock_flags waitflag); -int tdb_unlock_list(struct tdb_context *tdb, tdb_off_t list, int ltype); - -/* Lock/unlock a particular free list. */ -int tdb_lock_free_list(struct tdb_context *tdb, tdb_off_t flist, - enum tdb_lock_flags waitflag); -void tdb_unlock_free_list(struct tdb_context *tdb, tdb_off_t flist); +void tdb_lock_init(struct tdb_context *tdb); + +/* Lock/unlock a range of hashes. */ +int tdb_lock_hashes(struct tdb_context *tdb, + tdb_off_t hash_lock, tdb_len_t hash_range, + int ltype, enum tdb_lock_flags waitflag); +int tdb_unlock_hashes(struct tdb_context *tdb, + tdb_off_t hash_lock, + tdb_len_t hash_range, int ltype); + +/* Lock/unlock a particular free bucket. */ +int 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. */ +int tdb_transaction_lock(struct tdb_context *tdb, int ltype); +int tdb_transaction_unlock(struct tdb_context *tdb, int ltype); -/* Do we have any locks? */ -bool tdb_has_locks(struct tdb_context *tdb); +/* Do we have any hash locks (ie. via tdb_chainlock) ? */ +bool tdb_has_hash_locks(struct tdb_context *tdb); /* Lock entire database. */ int tdb_allrecord_lock(struct tdb_context *tdb, int ltype, enum tdb_lock_flags flags, bool upgradable); int tdb_allrecord_unlock(struct tdb_context *tdb, int ltype); +int tdb_allrecord_upgrade(struct tdb_context *tdb); /* Serialize db open. */ -int tdb_lock_open(struct tdb_context *tdb); +int tdb_lock_open(struct tdb_context *tdb, enum tdb_lock_flags flags); void tdb_unlock_open(struct tdb_context *tdb); -/* Expand the file. */ -int tdb_expand(struct tdb_context *tdb, tdb_len_t klen, tdb_len_t dlen, - bool growing); - -#if 0 -/* Low-level locking primitives. */ -int tdb_nest_lock(struct tdb_context *tdb, tdb_off_t offset, int ltype, - enum tdb_lock_flags flags); -int tdb_nest_unlock(struct tdb_context *tdb, tdb_off_t offset, int ltype); - -int tdb_munmap(struct tdb_context *tdb); -void tdb_mmap(struct tdb_context *tdb); -int tdb_lock(struct tdb_context *tdb, int list, int ltype); -int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype); -bool tdb_have_locks(struct tdb_context *tdb); -int tdb_unlock(struct tdb_context *tdb, int list, int ltype); -int tdb_brlock(struct tdb_context *tdb, - int rw_type, tdb_off_t offset, size_t len, - enum tdb_lock_flags flags); -int tdb_brunlock(struct tdb_context *tdb, - int rw_type, tdb_off_t offset, size_t len); -bool tdb_have_extra_locks(struct tdb_context *tdb); -void tdb_release_extra_locks(struct tdb_context *tdb); -int tdb_transaction_lock(struct tdb_context *tdb, int ltype); -int tdb_transaction_unlock(struct tdb_context *tdb, int ltype); -int tdb_allrecord_lock(struct tdb_context *tdb, int ltype, - enum tdb_lock_flags flags, bool upgradable); -int tdb_allrecord_unlock(struct tdb_context *tdb, int ltype); -int tdb_allrecord_upgrade(struct tdb_context *tdb); -int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_free(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec); -tdb_off_t tdb_allocate(struct tdb_context *tdb, tdb_len_t length, struct tdb_record *rec); -int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off); +bool tdb_has_open_lock(struct tdb_context *tdb); + +/* Serialize db expand. */ +int 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. */ +int tdb_lock_and_recover(struct tdb_context *tdb); + +/* traverse.c: */ +int first_in_hash(struct tdb_context *tdb, int ltype, + struct traverse_info *tinfo, + TDB_DATA *kbuf, size_t *dlen); +int next_in_hash(struct tdb_context *tdb, int ltype, + struct traverse_info *tinfo, + TDB_DATA *kbuf, size_t *dlen); + +/* transaction.c: */ +int tdb_transaction_recover(struct tdb_context *tdb); bool tdb_needs_recovery(struct tdb_context *tdb); -int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec); -int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec); -int tdb_do_delete(struct tdb_context *tdb, tdb_off_t rec_ptr, struct tdb_record *rec); -unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len); -int tdb_parse_data(struct tdb_context *tdb, TDB_DATA key, - tdb_off_t offset, tdb_len_t len, - int (*parser)(TDB_DATA key, TDB_DATA data, - void *private_data), - void *private_data); -tdb_off_t tdb_find_lock_hash(struct tdb_context *tdb, TDB_DATA key, uint32_t hash, int locktype, - struct tdb_record *rec); -void tdb_io_init(struct tdb_context *tdb); -int tdb_expand(struct tdb_context *tdb, tdb_off_t size); -int tdb_rec_free_read(struct tdb_context *tdb, tdb_off_t off, - struct tdb_record *rec); -#endif + +/* tdb.c: */ +void COLD tdb_logerr(struct tdb_context *tdb, + enum TDB_ERROR ecode, + enum tdb_debug_level level, + const char *fmt, ...); #ifdef TDB_TRACE void tdb_trace(struct tdb_context *tdb, const char *op);