X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Fprivate.h;h=9ae5bed2e6bc6cb8c397d32d1f7f6f6ef8574930;hp=236aa3696d6b4c30efe7e974b53500b51c2f7832;hb=1ad66fedf81fdaf0f07a2b00d6787614c58a23ef;hpb=3835bb95d716cb6448913792b0d8d539877d93e9
diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h
index 236aa369..9ae5bed2 100644
--- a/ccan/tdb2/private.h
+++ b/ccan/tdb2/private.h
@@ -18,8 +18,7 @@
License along with this library; if not, see .
*/
-#define _XOPEN_SOURCE 500
-#define _FILE_OFFSET_BITS 64
+#include "config.h"
#include
#include
#include
@@ -33,7 +32,6 @@
#include
#include
#include
-#include "config.h"
#include
#include
#include
@@ -118,6 +116,9 @@ typedef int tdb_bool_err;
#define TDB_OFF_HASH_EXTRA_BIT 57
#define TDB_OFF_UPPER_STEAL_SUBHASH_BIT 56
+/* Additional features we understand. Currently: none. */
+#define TDB_FEATURE_MASK ((uint64_t)0)
+
/* The bit number where we store the extra hash bits. */
/* Convenience mask to get actual offset. */
#define TDB_OFF_MASK \
@@ -242,7 +243,10 @@ struct tdb_header {
tdb_off_t free_table; /* (First) free table. */
tdb_off_t recovery; /* Transaction recovery area. */
- tdb_off_t reserved[26];
+ uint64_t features_used; /* Features all writers understand */
+ uint64_t features_offered; /* Features offered */
+
+ tdb_off_t reserved[24];
/* Top level hash table. */
tdb_off_t hashtable[1ULL << TDB_TOPLEVEL_HASH_BITS];
@@ -311,6 +315,23 @@ struct tdb_access_hdr {
bool convert;
};
+struct tdb_file {
+ /* Single list of all TDBs, to detect multiple opens. */
+ struct tdb_file *next;
+
+ /* The file descriptor. */
+ int fd;
+
+ /* Lock information */
+ struct tdb_lock_type allrecord_lock;
+ size_t num_lockrecs;
+ struct tdb_lock_type *lockrecs;
+
+ /* Identity of this file. */
+ dev_t device;
+ ino_t inode;
+};
+
struct tdb_context {
/* Filename of the database. */
const char *name;
@@ -321,9 +342,6 @@ struct tdb_context {
/* 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;
@@ -361,20 +379,13 @@ struct tdb_context {
/* IO methods: changes for transactions. */
const struct tdb_methods *methods;
- /* Lock information */
- struct tdb_lock_type allrecord_lock;
- size_t num_lockrecs;
- struct tdb_lock_type *lockrecs;
-
struct tdb_attribute_stats *stats;
/* Direct access information */
struct tdb_access_hdr *access;
- /* Single list of all TDBs, to avoid multiple opens. */
- struct tdb_context *next;
- dev_t device;
- ino_t inode;
+ /* The actual file information */
+ struct tdb_file *file;
};
struct tdb_methods {
@@ -453,7 +464,7 @@ unsigned int size_to_bucket(tdb_len_t data_len);
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 dead_space(struct tdb_context *tdb, tdb_off_t off);
/* io.c: */
/* Initialize tdb->methods. */
@@ -517,8 +528,6 @@ void add_stat_(struct tdb_context *tdb, uint64_t *stat, size_t val);
} while (0)
/* lock.c: */
-void tdb_lock_init(struct tdb_context *tdb);
-
/* Lock/unlock a range of hashes. */
enum TDB_ERROR tdb_lock_hashes(struct tdb_context *tdb,
tdb_off_t hash_lock, tdb_len_t hash_range,
@@ -560,8 +569,8 @@ bool tdb_has_expansion_lock(struct tdb_context *tdb);
enum TDB_ERROR tdb_lock_and_recover(struct tdb_context *tdb);
/* transaction.c: */
-int tdb_transaction_recover(struct tdb_context *tdb);
-bool tdb_needs_recovery(struct tdb_context *tdb);
+enum TDB_ERROR tdb_transaction_recover(struct tdb_context *tdb);
+tdb_bool_err tdb_needs_recovery(struct tdb_context *tdb);
/* tdb.c: */
enum TDB_ERROR COLD tdb_logerr(struct tdb_context *tdb,