X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb%2Ftdb_private.h;h=babf01bd836f20dfbe771b6926e911b52d118260;hp=228e8dcf9b09eaedf64fd166b8a683deb50070a0;hb=87d99348a110a52fbc6e225b360e566fc474956a;hpb=6dbbd0b7fd9c79c14d9c8a985373dcccbba218c4

diff --git a/ccan/tdb/tdb_private.h b/ccan/tdb/tdb_private.h
index 228e8dcf..babf01bd 100644
--- a/ccan/tdb/tdb_private.h
+++ b/ccan/tdb/tdb_private.h
@@ -72,7 +72,7 @@ typedef uint32_t tdb_len_t;
 typedef uint32_t tdb_off_t;
 
 #ifndef offsetof
-#define offsetof(t,f) ((unsigned int)&((t *)0)->f)
+#define offsetof(t,f) ((size_t)&((t *)0)->f)
 #endif
 
 #define TDB_MAGIC_FOOD "TDB file\n"
@@ -82,6 +82,7 @@ typedef uint32_t tdb_off_t;
 #define TDB_DEAD_MAGIC (0xFEE1DEAD)
 #define TDB_RECOVERY_MAGIC (0xf53bc0e7U)
 #define TDB_RECOVERY_INVALID_MAGIC (0x0)
+#define TDB_HASH_RWLOCK_MAGIC (0xbad1a51U)
 #define TDB_ALIGNMENT 4
 #define DEFAULT_HASH_SIZE 131
 #define FREELIST_TOP (sizeof(struct tdb_header))
@@ -179,7 +180,9 @@ struct tdb_header {
 	tdb_off_t rwlocks; /* obsolete - kept to detect old formats */
 	tdb_off_t recovery_start; /* offset of transaction recovery region */
 	tdb_off_t sequence_number; /* used when TDB_SEQNUM is set */
-	tdb_off_t reserved[29];
+	uint32_t magic1_hash; /* hash of TDB_MAGIC_FOOD. */
+	uint32_t magic2_hash; /* hash of TDB_MAGIC. */
+	tdb_off_t reserved[27];
 };
 
 struct tdb_lock_type {
@@ -298,6 +301,8 @@ 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);
-
-
+void tdb_header_hash(struct tdb_context *tdb,
+		     uint32_t *magic1_hash, uint32_t *magic2_hash);
+unsigned int tdb_old_hash(TDB_DATA *key);
+size_t tdb_dead_space(struct tdb_context *tdb, tdb_off_t off);
 #endif