#ifndef TDB_PRIVATE_H
#define TDB_PRIVATE_H
- /*
+ /*
Trivial Database 2: private types and prototypes
Copyright (C) Rusty Russell 2010
#include <ccan/tdb2/tdb2.h>
#include <ccan/likely/likely.h>
#include <ccan/compiler/compiler.h>
-#ifdef HAVE_BYTESWAP_H
+#if HAVE_BYTESWAP_H
#include <byteswap.h>
#endif
#define TDB_MAGIC_FOOD "TDB file\n"
#define TDB_VERSION ((uint64_t)(0x26011967 + 7))
-#define TDB_MAGIC ((uint64_t)0x1999)
+#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)
(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)
+#define TDB_FTABLE_NONE ((1ULL << TDB_OFF_UPPER_STEAL) - 1)
#if !HAVE_BSWAP_64
static inline uint64_t bswap_64(uint64_t x)
struct tdb_free_record {
uint64_t magic_and_prev; /* TDB_OFF_UPPER_STEAL bits magic, then prev */
- uint64_t flist_and_len; /* Len not counting these two fields. */
+ 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_len(const struct tdb_free_record *f)
{
- return f->flist_and_len & ((1ULL << (64 - TDB_OFF_UPPER_STEAL))-1);
+ return f->ftable_and_len & ((1ULL << (64 - TDB_OFF_UPPER_STEAL))-1);
}
-static inline unsigned frec_flist(const struct tdb_free_record *f)
+static inline unsigned frec_ftable(const struct tdb_free_record *f)
{
- return f->flist_and_len >> (64 - TDB_OFF_UPPER_STEAL);
+ return f->ftable_and_len >> (64 - TDB_OFF_UPPER_STEAL);
}
struct tdb_recovery_record {
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 free_table; /* (First) free table. */
tdb_off_t recovery; /* Transaction recovery area. */
tdb_off_t reserved[26];
tdb_off_t hashtable[1ULL << TDB_TOPLEVEL_HASH_BITS];
};
-struct tdb_freelist {
+struct tdb_freetable {
struct tdb_used_record hdr;
tdb_off_t next;
tdb_off_t buckets[TDB_FREE_BUCKETS];
int mmap_flags;
/* Error code for last tdb error. */
- enum TDB_ERROR ecode;
+ enum TDB_ERROR ecode;
/* the flags passed to tdb_open, for tdb_reopen. */
uint32_t flags;
/* Logging function */
- tdb_logfn_t logfn;
+ void (*logfn)(struct tdb_context *tdb,
+ enum tdb_log_level level,
+ void *log_private,
+ const char *message);
void *log_private;
/* Hash function. */
/* Set if we are in a transaction. */
struct tdb_transaction *transaction;
- /* What freelist are we using? */
- uint64_t flist_off;
- unsigned int flist;
+ /* What free table are we using? */
+ tdb_off_t ftable_off;
+ unsigned int ftable;
/* IO methods: changes for transactions. */
const struct tdb_methods *methods;
/* Single list of all TDBs, to avoid multiple opens. */
struct tdb_context *next;
- dev_t device;
+ dev_t device;
ino_t inode;
};
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 (*tread)(struct tdb_context *, tdb_off_t, void *, tdb_len_t);
+ int (*twrite)(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);
void *(*direct)(struct tdb_context *, tdb_off_t, size_t, bool);
bool is_subhash(tdb_off_t val);
/* free.c: */
-int tdb_flist_init(struct tdb_context *tdb);
+int tdb_ftable_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);
+tdb_off_t first_ftable(struct tdb_context *tdb);
+tdb_off_t next_ftable(struct tdb_context *tdb, tdb_off_t ftable);
-/* If this fails, try tdb_expand. */
+/* This returns space or TDB_OFF_ERR. */
tdb_off_t alloc(struct tdb_context *tdb, size_t keylen, size_t datalen,
- uint64_t hash, bool growing);
+ uint64_t hash, unsigned magic, bool growing);
/* Put this record in a free list. */
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_used_header(struct tdb_context *tdb,
- struct tdb_used_record *rec,
- uint64_t keylen, uint64_t datalen,
- uint64_t actuallen, unsigned hashlow);
+/* Set up header for a used/ftable/htable/chain record. */
+int 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 flist_off, unsigned bucket);
+tdb_off_t bucket_off(tdb_off_t ftable_off, unsigned bucket);
/* Used by tdb_summary */
size_t dead_space(struct tdb_context *tdb, tdb_off_t off);
tdb_off_t tdb_find_zero_off(struct tdb_context *tdb, tdb_off_t off,
uint64_t num);
-/* Even on files, we can get partial writes due to signals. */
-bool tdb_pwrite_all(int fd, const void *buf, size_t len, tdb_off_t off);
-bool tdb_pread_all(int fd, void *buf, size_t len, tdb_off_t off);
-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);
/* tdb.c: */
void COLD tdb_logerr(struct tdb_context *tdb,
enum TDB_ERROR ecode,
- enum tdb_debug_level level,
+ enum tdb_log_level level,
const char *fmt, ...);
#ifdef TDB_TRACE
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