X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Ftdb1_transaction.c;h=411caef360d4ff5e1353b60263e7252d87d9ef1f;hp=f0623025f95268f12a89febf9246475946e3fd8a;hb=56023cca5f66a40646a1e807c3d10af6e5913623;hpb=8458811a4126c22635b974718bfbf2876c893c37

diff --git a/ccan/tdb2/tdb1_transaction.c b/ccan/tdb2/tdb1_transaction.c
index f0623025..411caef3 100644
--- a/ccan/tdb2/tdb1_transaction.c
+++ b/ccan/tdb2/tdb1_transaction.c
@@ -138,14 +138,14 @@ struct tdb1_transaction {
   read while in a transaction. We need to check first if the data is in our list
   of transaction elements, then if not do a real read
 */
-static int transaction1_read(struct tdb1_context *tdb, tdb1_off_t off, void *buf,
+static int transaction1_read(struct tdb_context *tdb, tdb1_off_t off, void *buf,
 			     tdb1_len_t len, int cv)
 {
 	uint32_t blk;
 
 	/* break it down into block sized ops */
-	while (len + (off % tdb->transaction->block_size) > tdb->transaction->block_size) {
-		tdb1_len_t len2 = tdb->transaction->block_size - (off % tdb->transaction->block_size);
+	while (len + (off % tdb->tdb1.transaction->block_size) > tdb->tdb1.transaction->block_size) {
+		tdb1_len_t len2 = tdb->tdb1.transaction->block_size - (off % tdb->tdb1.transaction->block_size);
 		if (transaction1_read(tdb, off, buf, len2, cv) != 0) {
 			return -1;
 		}
@@ -158,27 +158,27 @@ static int transaction1_read(struct tdb1_context *tdb, tdb1_off_t off, void *buf
 		return 0;
 	}
 
-	blk = off / tdb->transaction->block_size;
+	blk = off / tdb->tdb1.transaction->block_size;
 
 	/* see if we have it in the block list */
-	if (tdb->transaction->num_blocks <= blk ||
-	    tdb->transaction->blocks[blk] == NULL) {
+	if (tdb->tdb1.transaction->num_blocks <= blk ||
+	    tdb->tdb1.transaction->blocks[blk] == NULL) {
 		/* nope, do a real read */
-		if (tdb->transaction->io_methods->tdb1_read(tdb, off, buf, len, cv) != 0) {
+		if (tdb->tdb1.transaction->io_methods->tdb1_read(tdb, off, buf, len, cv) != 0) {
 			goto fail;
 		}
 		return 0;
 	}
 
 	/* it is in the block list. Now check for the last block */
-	if (blk == tdb->transaction->num_blocks-1) {
-		if (len > tdb->transaction->last_block_size) {
+	if (blk == tdb->tdb1.transaction->num_blocks-1) {
+		if (len > tdb->tdb1.transaction->last_block_size) {
 			goto fail;
 		}
 	}
 
 	/* now copy it out of this block */
-	memcpy(buf, tdb->transaction->blocks[blk] + (off % tdb->transaction->block_size), len);
+	memcpy(buf, tdb->tdb1.transaction->blocks[blk] + (off % tdb->tdb1.transaction->block_size), len);
 	if (cv) {
 		tdb1_convert(buf, len);
 	}
@@ -188,7 +188,7 @@ fail:
 	tdb->last_error = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
 				"transaction_read: failed at off=%d len=%d",
 				off, len);
-	tdb->transaction->transaction_error = 1;
+	tdb->tdb1.transaction->transaction_error = 1;
 	return -1;
 }
 
@@ -196,17 +196,17 @@ fail:
 /*
   write while in a transaction
 */
-static int transaction1_write(struct tdb1_context *tdb, tdb1_off_t off,
+static int transaction1_write(struct tdb_context *tdb, tdb1_off_t off,
 			     const void *buf, tdb1_len_t len)
 {
 	uint32_t blk;
 
 	/* Only a commit is allowed on a prepared transaction */
-	if (tdb->transaction->prepared) {
+	if (tdb->tdb1.transaction->prepared) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
 					"transaction_write: transaction already"
 					" prepared, write not allowed");
-		tdb->transaction->transaction_error = 1;
+		tdb->tdb1.transaction->transaction_error = 1;
 		return -1;
 	}
 
@@ -215,12 +215,12 @@ static int transaction1_write(struct tdb1_context *tdb, tdb1_off_t off,
 	if (len == sizeof(tdb1_off_t) && off >= TDB1_FREELIST_TOP &&
 	    off < TDB1_FREELIST_TOP+TDB1_HASHTABLE_SIZE(tdb)) {
 		uint32_t chain = (off-TDB1_FREELIST_TOP) / sizeof(tdb1_off_t);
-		memcpy(&tdb->transaction->hash_heads[chain], buf, len);
+		memcpy(&tdb->tdb1.transaction->hash_heads[chain], buf, len);
 	}
 
 	/* break it up into block sized chunks */
-	while (len + (off % tdb->transaction->block_size) > tdb->transaction->block_size) {
-		tdb1_len_t len2 = tdb->transaction->block_size - (off % tdb->transaction->block_size);
+	while (len + (off % tdb->tdb1.transaction->block_size) > tdb->tdb1.transaction->block_size) {
+		tdb1_len_t len2 = tdb->tdb1.transaction->block_size - (off % tdb->tdb1.transaction->block_size);
 		if (transaction1_write(tdb, off, buf, len2) != 0) {
 			return -1;
 		}
@@ -235,66 +235,66 @@ static int transaction1_write(struct tdb1_context *tdb, tdb1_off_t off,
 		return 0;
 	}
 
-	blk = off / tdb->transaction->block_size;
-	off = off % tdb->transaction->block_size;
+	blk = off / tdb->tdb1.transaction->block_size;
+	off = off % tdb->tdb1.transaction->block_size;
 
-	if (tdb->transaction->num_blocks <= blk) {
+	if (tdb->tdb1.transaction->num_blocks <= blk) {
 		uint8_t **new_blocks;
 		/* expand the blocks array */
-		if (tdb->transaction->blocks == NULL) {
+		if (tdb->tdb1.transaction->blocks == NULL) {
 			new_blocks = (uint8_t **)malloc(
 				(blk+1)*sizeof(uint8_t *));
 		} else {
 			new_blocks = (uint8_t **)realloc(
-				tdb->transaction->blocks,
+				tdb->tdb1.transaction->blocks,
 				(blk+1)*sizeof(uint8_t *));
 		}
 		if (new_blocks == NULL) {
 			tdb->last_error = TDB_ERR_OOM;
 			goto fail;
 		}
-		memset(&new_blocks[tdb->transaction->num_blocks], 0,
-		       (1+(blk - tdb->transaction->num_blocks))*sizeof(uint8_t *));
-		tdb->transaction->blocks = new_blocks;
-		tdb->transaction->num_blocks = blk+1;
-		tdb->transaction->last_block_size = 0;
+		memset(&new_blocks[tdb->tdb1.transaction->num_blocks], 0,
+		       (1+(blk - tdb->tdb1.transaction->num_blocks))*sizeof(uint8_t *));
+		tdb->tdb1.transaction->blocks = new_blocks;
+		tdb->tdb1.transaction->num_blocks = blk+1;
+		tdb->tdb1.transaction->last_block_size = 0;
 	}
 
 	/* allocate and fill a block? */
-	if (tdb->transaction->blocks[blk] == NULL) {
-		tdb->transaction->blocks[blk] = (uint8_t *)calloc(tdb->transaction->block_size, 1);
-		if (tdb->transaction->blocks[blk] == NULL) {
+	if (tdb->tdb1.transaction->blocks[blk] == NULL) {
+		tdb->tdb1.transaction->blocks[blk] = (uint8_t *)calloc(tdb->tdb1.transaction->block_size, 1);
+		if (tdb->tdb1.transaction->blocks[blk] == NULL) {
 			tdb->last_error = TDB_ERR_OOM;
-			tdb->transaction->transaction_error = 1;
+			tdb->tdb1.transaction->transaction_error = 1;
 			return -1;
 		}
-		if (tdb->transaction->old_map_size > blk * tdb->transaction->block_size) {
-			tdb1_len_t len2 = tdb->transaction->block_size;
-			if (len2 + (blk * tdb->transaction->block_size) > tdb->transaction->old_map_size) {
-				len2 = tdb->transaction->old_map_size - (blk * tdb->transaction->block_size);
+		if (tdb->tdb1.transaction->old_map_size > blk * tdb->tdb1.transaction->block_size) {
+			tdb1_len_t len2 = tdb->tdb1.transaction->block_size;
+			if (len2 + (blk * tdb->tdb1.transaction->block_size) > tdb->tdb1.transaction->old_map_size) {
+				len2 = tdb->tdb1.transaction->old_map_size - (blk * tdb->tdb1.transaction->block_size);
 			}
-			if (tdb->transaction->io_methods->tdb1_read(tdb, blk * tdb->transaction->block_size,
-								   tdb->transaction->blocks[blk],
+			if (tdb->tdb1.transaction->io_methods->tdb1_read(tdb, blk * tdb->tdb1.transaction->block_size,
+								   tdb->tdb1.transaction->blocks[blk],
 								   len2, 0) != 0) {
-				SAFE_FREE(tdb->transaction->blocks[blk]);
+				SAFE_FREE(tdb->tdb1.transaction->blocks[blk]);
 				tdb->last_error = TDB_ERR_IO;
 				goto fail;
 			}
-			if (blk == tdb->transaction->num_blocks-1) {
-				tdb->transaction->last_block_size = len2;
+			if (blk == tdb->tdb1.transaction->num_blocks-1) {
+				tdb->tdb1.transaction->last_block_size = len2;
 			}
 		}
 	}
 
 	/* overwrite part of an existing block */
 	if (buf == NULL) {
-		memset(tdb->transaction->blocks[blk] + off, 0, len);
+		memset(tdb->tdb1.transaction->blocks[blk] + off, 0, len);
 	} else {
-		memcpy(tdb->transaction->blocks[blk] + off, buf, len);
+		memcpy(tdb->tdb1.transaction->blocks[blk] + off, buf, len);
 	}
-	if (blk == tdb->transaction->num_blocks-1) {
-		if (len + off > tdb->transaction->last_block_size) {
-			tdb->transaction->last_block_size = len + off;
+	if (blk == tdb->tdb1.transaction->num_blocks-1) {
+		if (len + off > tdb->tdb1.transaction->last_block_size) {
+			tdb->tdb1.transaction->last_block_size = len + off;
 		}
 	}
 
@@ -303,8 +303,8 @@ static int transaction1_write(struct tdb1_context *tdb, tdb1_off_t off,
 fail:
 	tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 		   "transaction_write: failed at off=%d len=%d",
-		   (blk*tdb->transaction->block_size) + off, len);
-	tdb->transaction->transaction_error = 1;
+		   (blk*tdb->tdb1.transaction->block_size) + off, len);
+	tdb->tdb1.transaction->transaction_error = 1;
 	return -1;
 }
 
@@ -313,14 +313,14 @@ fail:
   write while in a transaction - this varient never expands the transaction blocks, it only
   updates existing blocks. This means it cannot change the recovery size
 */
-static int transaction1_write_existing(struct tdb1_context *tdb, tdb1_off_t off,
+static int transaction1_write_existing(struct tdb_context *tdb, tdb1_off_t off,
 				      const void *buf, tdb1_len_t len)
 {
 	uint32_t blk;
 
 	/* break it up into block sized chunks */
-	while (len + (off % tdb->transaction->block_size) > tdb->transaction->block_size) {
-		tdb1_len_t len2 = tdb->transaction->block_size - (off % tdb->transaction->block_size);
+	while (len + (off % tdb->tdb1.transaction->block_size) > tdb->tdb1.transaction->block_size) {
+		tdb1_len_t len2 = tdb->tdb1.transaction->block_size - (off % tdb->tdb1.transaction->block_size);
 		if (transaction1_write_existing(tdb, off, buf, len2) != 0) {
 			return -1;
 		}
@@ -335,24 +335,24 @@ static int transaction1_write_existing(struct tdb1_context *tdb, tdb1_off_t off,
 		return 0;
 	}
 
-	blk = off / tdb->transaction->block_size;
-	off = off % tdb->transaction->block_size;
+	blk = off / tdb->tdb1.transaction->block_size;
+	off = off % tdb->tdb1.transaction->block_size;
 
-	if (tdb->transaction->num_blocks <= blk ||
-	    tdb->transaction->blocks[blk] == NULL) {
+	if (tdb->tdb1.transaction->num_blocks <= blk ||
+	    tdb->tdb1.transaction->blocks[blk] == NULL) {
 		return 0;
 	}
 
-	if (blk == tdb->transaction->num_blocks-1 &&
-	    off + len > tdb->transaction->last_block_size) {
-		if (off >= tdb->transaction->last_block_size) {
+	if (blk == tdb->tdb1.transaction->num_blocks-1 &&
+	    off + len > tdb->tdb1.transaction->last_block_size) {
+		if (off >= tdb->tdb1.transaction->last_block_size) {
 			return 0;
 		}
-		len = tdb->transaction->last_block_size - off;
+		len = tdb->tdb1.transaction->last_block_size - off;
 	}
 
 	/* overwrite part of an existing block */
-	memcpy(tdb->transaction->blocks[blk] + off, buf, len);
+	memcpy(tdb->tdb1.transaction->blocks[blk] + off, buf, len);
 
 	return 0;
 }
@@ -361,12 +361,12 @@ static int transaction1_write_existing(struct tdb1_context *tdb, tdb1_off_t off,
 /*
   accelerated hash chain head search, using the cached hash heads
 */
-static void transaction1_next_hash_chain(struct tdb1_context *tdb, uint32_t *chain)
+static void transaction1_next_hash_chain(struct tdb_context *tdb, uint32_t *chain)
 {
 	uint32_t h = *chain;
-	for (;h < tdb->header.hash_size;h++) {
+	for (;h < tdb->tdb1.header.hash_size;h++) {
 		/* the +1 takes account of the freelist */
-		if (0 != tdb->transaction->hash_heads[h+1]) {
+		if (0 != tdb->tdb1.transaction->hash_heads[h+1]) {
 			break;
 		}
 	}
@@ -376,7 +376,7 @@ static void transaction1_next_hash_chain(struct tdb1_context *tdb, uint32_t *cha
 /*
   out of bounds check during a transaction
 */
-static int transaction1_oob(struct tdb1_context *tdb, tdb1_off_t len, int probe)
+static int transaction1_oob(struct tdb_context *tdb, tdb1_off_t len, int probe)
 {
 	if (len <= tdb->file->map_size) {
 		return 0;
@@ -388,7 +388,7 @@ static int transaction1_oob(struct tdb1_context *tdb, tdb1_off_t len, int probe)
 /*
   transaction version of tdb1_expand().
 */
-static int transaction1_expand_file(struct tdb1_context *tdb, tdb1_off_t size,
+static int transaction1_expand_file(struct tdb_context *tdb, tdb1_off_t size,
 				    tdb1_off_t addition)
 {
 	/* add a write to the transaction elements, so subsequent
@@ -397,7 +397,7 @@ static int transaction1_expand_file(struct tdb1_context *tdb, tdb1_off_t size,
 		return -1;
 	}
 
-	tdb->transaction->expanded = true;
+	tdb->tdb1.transaction->expanded = true;
 
 	return 0;
 }
@@ -413,26 +413,43 @@ static const struct tdb1_methods transaction1_methods = {
 
 /*
   start a tdb transaction. No token is returned, as only a single
-  transaction is allowed to be pending per tdb1_context
+  transaction is allowed to be pending per tdb_context
 */
-static int _tdb1_transaction_start(struct tdb1_context *tdb)
+static int _tdb1_transaction_start(struct tdb_context *tdb)
 {
 	/* some sanity checks */
-	if (tdb->read_only || (tdb->flags & TDB_INTERNAL) || tdb->traverse_read) {
-		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
-					"tdb1_transaction_start: cannot start a"
-					" transaction on a read-only or"
-					" internal db");
+	if (tdb->flags & TDB_INTERNAL) {
+		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+					     TDB_LOG_USE_ERROR,
+					     "tdb1_transaction_start:"
+					     " cannot start a"
+					     " transaction on an"
+					     " internal tdb");
+		return -1;
+	}
+
+	if ((tdb->flags & TDB_RDONLY) || tdb->tdb1.traverse_read) {
+		tdb->last_error = tdb_logerr(tdb, TDB_ERR_RDONLY,
+					     TDB_LOG_USE_ERROR,
+					     "tdb_transaction_start:"
+					     " cannot start a"
+					     " transaction on a "
+					     " read-only tdb");
 		return -1;
 	}
 
 	/* cope with nested tdb1_transaction_start() calls */
-	if (tdb->transaction != NULL) {
+	if (tdb->tdb1.transaction != NULL) {
 		if (!(tdb->flags & TDB_ALLOW_NESTING)) {
-			tdb->last_error = TDB_ERR_EINVAL;
+			tdb->last_error
+				= tdb_logerr(tdb, TDB_ERR_EINVAL,
+					     TDB_LOG_USE_ERROR,
+					     "tdb_transaction_start:"
+					     " already inside transaction");
 			return -1;
 		}
-		tdb->transaction->nesting++;
+		tdb->stats.transaction_nest++;
+		tdb->tdb1.transaction->nesting++;
 		return 0;
 	}
 
@@ -446,7 +463,7 @@ static int _tdb1_transaction_start(struct tdb1_context *tdb)
 		return -1;
 	}
 
-	if (tdb->travlocks.next != NULL) {
+	if (tdb->tdb1.travlocks.next != NULL) {
 		/* you cannot use transactions inside a traverse (although you can use
 		   traverse inside a transaction) as otherwise you can end up with
 		   deadlock */
@@ -456,22 +473,22 @@ static int _tdb1_transaction_start(struct tdb1_context *tdb)
 		return -1;
 	}
 
-	tdb->transaction = (struct tdb1_transaction *)
+	tdb->tdb1.transaction = (struct tdb1_transaction *)
 		calloc(sizeof(struct tdb1_transaction), 1);
-	if (tdb->transaction == NULL) {
+	if (tdb->tdb1.transaction == NULL) {
 		tdb->last_error = TDB_ERR_OOM;
 		return -1;
 	}
 
 	/* a page at a time seems like a reasonable compromise between compactness and efficiency */
-	tdb->transaction->block_size = tdb->page_size;
+	tdb->tdb1.transaction->block_size = tdb->tdb1.page_size;
 
 	/* get the transaction write lock. This is a blocking lock. As
 	   discussed with Volker, there are a number of ways we could
 	   make this async, which we will probably do in the future */
 	if (tdb1_transaction_lock(tdb, F_WRLCK, TDB_LOCK_WAIT) == -1) {
-		SAFE_FREE(tdb->transaction->blocks);
-		SAFE_FREE(tdb->transaction);
+		SAFE_FREE(tdb->tdb1.transaction->blocks);
+		SAFE_FREE(tdb->tdb1.transaction);
 		return -1;
 	}
 
@@ -488,13 +505,13 @@ static int _tdb1_transaction_start(struct tdb1_context *tdb)
 
 	/* setup a copy of the hash table heads so the hash scan in
 	   traverse can be fast */
-	tdb->transaction->hash_heads = (uint32_t *)
-		calloc(tdb->header.hash_size+1, sizeof(uint32_t));
-	if (tdb->transaction->hash_heads == NULL) {
+	tdb->tdb1.transaction->hash_heads = (uint32_t *)
+		calloc(tdb->tdb1.header.hash_size+1, sizeof(uint32_t));
+	if (tdb->tdb1.transaction->hash_heads == NULL) {
 		tdb->last_error = TDB_ERR_OOM;
 		goto fail;
 	}
-	if (tdb->methods->tdb1_read(tdb, TDB1_FREELIST_TOP, tdb->transaction->hash_heads,
+	if (tdb->tdb1.io->tdb1_read(tdb, TDB1_FREELIST_TOP, tdb->tdb1.transaction->hash_heads,
 				   TDB1_HASHTABLE_SIZE(tdb), 0) != 0) {
 		tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 			   "tdb1_transaction_start: failed to read hash heads");
@@ -503,27 +520,28 @@ static int _tdb1_transaction_start(struct tdb1_context *tdb)
 
 	/* make sure we know about any file expansions already done by
 	   anyone else */
-	tdb->methods->tdb1_oob(tdb, tdb->file->map_size + 1, 1);
-	tdb->transaction->old_map_size = tdb->file->map_size;
+	tdb->tdb1.io->tdb1_oob(tdb, tdb->file->map_size + 1, 1);
+	tdb->tdb1.transaction->old_map_size = tdb->file->map_size;
 
 	/* finally hook the io methods, replacing them with
 	   transaction specific methods */
-	tdb->transaction->io_methods = tdb->methods;
-	tdb->methods = &transaction1_methods;
+	tdb->tdb1.transaction->io_methods = tdb->tdb1.io;
+	tdb->tdb1.io = &transaction1_methods;
 
+	tdb->stats.transactions++;
 	return 0;
 
 fail:
 	tdb1_allrecord_unlock(tdb, F_RDLCK);
 fail_allrecord_lock:
 	tdb1_transaction_unlock(tdb, F_WRLCK);
-	SAFE_FREE(tdb->transaction->blocks);
-	SAFE_FREE(tdb->transaction->hash_heads);
-	SAFE_FREE(tdb->transaction);
+	SAFE_FREE(tdb->tdb1.transaction->blocks);
+	SAFE_FREE(tdb->tdb1.transaction->hash_heads);
+	SAFE_FREE(tdb->tdb1.transaction);
 	return -1;
 }
 
-int tdb1_transaction_start(struct tdb1_context *tdb)
+int tdb1_transaction_start(struct tdb_context *tdb)
 {
 	return _tdb1_transaction_start(tdb);
 }
@@ -531,7 +549,7 @@ int tdb1_transaction_start(struct tdb1_context *tdb)
 /*
   sync to disk
 */
-static int transaction1_sync(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_len_t length)
+static int transaction1_sync(struct tdb_context *tdb, tdb1_off_t offset, tdb1_len_t length)
 {
 	if (tdb->flags & TDB_NOSYNC) {
 		return 0;
@@ -548,7 +566,7 @@ static int transaction1_sync(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_l
 	}
 #if HAVE_MMAP
 	if (tdb->file->map_ptr) {
-		tdb1_off_t moffset = offset & ~(tdb->page_size-1);
+		tdb1_off_t moffset = offset & ~(tdb->tdb1.page_size-1);
 		if (msync(moffset + (char *)tdb->file->map_ptr,
 			  length + (offset - moffset), MS_SYNC) != 0) {
 			tdb->last_error = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
@@ -563,40 +581,40 @@ static int transaction1_sync(struct tdb1_context *tdb, tdb1_off_t offset, tdb1_l
 }
 
 
-static int _tdb1_transaction_cancel(struct tdb1_context *tdb)
+static int _tdb1_transaction_cancel(struct tdb_context *tdb)
 {
 	int i, ret = 0;
 
-	if (tdb->transaction == NULL) {
+	if (tdb->tdb1.transaction == NULL) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
 					"tdb1_transaction_cancel:"
 					" no transaction");
 		return -1;
 	}
 
-	if (tdb->transaction->nesting != 0) {
-		tdb->transaction->transaction_error = 1;
-		tdb->transaction->nesting--;
+	if (tdb->tdb1.transaction->nesting != 0) {
+		tdb->tdb1.transaction->transaction_error = 1;
+		tdb->tdb1.transaction->nesting--;
 		return 0;
 	}
 
-	tdb->file->map_size = tdb->transaction->old_map_size;
+	tdb->file->map_size = tdb->tdb1.transaction->old_map_size;
 
 	/* free all the transaction blocks */
-	for (i=0;i<tdb->transaction->num_blocks;i++) {
-		if (tdb->transaction->blocks[i] != NULL) {
-			free(tdb->transaction->blocks[i]);
+	for (i=0;i<tdb->tdb1.transaction->num_blocks;i++) {
+		if (tdb->tdb1.transaction->blocks[i] != NULL) {
+			free(tdb->tdb1.transaction->blocks[i]);
 		}
 	}
-	SAFE_FREE(tdb->transaction->blocks);
+	SAFE_FREE(tdb->tdb1.transaction->blocks);
 
-	if (tdb->transaction->magic_offset) {
-		const struct tdb1_methods *methods = tdb->transaction->io_methods;
+	if (tdb->tdb1.transaction->magic_offset) {
+		const struct tdb1_methods *methods = tdb->tdb1.transaction->io_methods;
 		const uint32_t invalid = TDB1_RECOVERY_INVALID_MAGIC;
 
 		/* remove the recovery marker */
-		if (methods->tdb1_write(tdb, tdb->transaction->magic_offset, &invalid, 4) == -1 ||
-		transaction1_sync(tdb, tdb->transaction->magic_offset, 4) == -1) {
+		if (methods->tdb1_write(tdb, tdb->tdb1.transaction->magic_offset, &invalid, 4) == -1 ||
+		transaction1_sync(tdb, tdb->tdb1.transaction->magic_offset, 4) == -1) {
 			tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 				   "tdb1_transaction_cancel: failed to"
 				   " remove recovery magic");
@@ -608,10 +626,10 @@ static int _tdb1_transaction_cancel(struct tdb1_context *tdb)
 	tdb1_release_transaction_locks(tdb);
 
 	/* restore the normal io methods */
-	tdb->methods = tdb->transaction->io_methods;
+	tdb->tdb1.io = tdb->tdb1.transaction->io_methods;
 
-	SAFE_FREE(tdb->transaction->hash_heads);
-	SAFE_FREE(tdb->transaction);
+	SAFE_FREE(tdb->tdb1.transaction->hash_heads);
+	SAFE_FREE(tdb->tdb1.transaction);
 
 	return ret;
 }
@@ -619,39 +637,40 @@ static int _tdb1_transaction_cancel(struct tdb1_context *tdb)
 /*
   cancel the current transaction
 */
-int tdb1_transaction_cancel(struct tdb1_context *tdb)
+int tdb1_transaction_cancel(struct tdb_context *tdb)
 {
+	tdb->stats.transaction_cancel++;
 	return _tdb1_transaction_cancel(tdb);
 }
 
 /*
   work out how much space the linearised recovery data will consume
 */
-static tdb1_len_t tdb1_recovery_size(struct tdb1_context *tdb)
+static tdb1_len_t tdb1_recovery_size(struct tdb_context *tdb)
 {
 	tdb1_len_t recovery_size = 0;
 	int i;
 
 	recovery_size = sizeof(uint32_t);
-	for (i=0;i<tdb->transaction->num_blocks;i++) {
-		if (i * tdb->transaction->block_size >= tdb->transaction->old_map_size) {
+	for (i=0;i<tdb->tdb1.transaction->num_blocks;i++) {
+		if (i * tdb->tdb1.transaction->block_size >= tdb->tdb1.transaction->old_map_size) {
 			break;
 		}
-		if (tdb->transaction->blocks[i] == NULL) {
+		if (tdb->tdb1.transaction->blocks[i] == NULL) {
 			continue;
 		}
 		recovery_size += 2*sizeof(tdb1_off_t);
-		if (i == tdb->transaction->num_blocks-1) {
-			recovery_size += tdb->transaction->last_block_size;
+		if (i == tdb->tdb1.transaction->num_blocks-1) {
+			recovery_size += tdb->tdb1.transaction->last_block_size;
 		} else {
-			recovery_size += tdb->transaction->block_size;
+			recovery_size += tdb->tdb1.transaction->block_size;
 		}
 	}
 
 	return recovery_size;
 }
 
-int tdb1_recovery_area(struct tdb1_context *tdb,
+int tdb1_recovery_area(struct tdb_context *tdb,
 		      const struct tdb1_methods *methods,
 		      tdb1_off_t *recovery_offset,
 		      struct tdb1_record *rec)
@@ -683,13 +702,13 @@ int tdb1_recovery_area(struct tdb1_context *tdb,
   allocate the recovery area, or use an existing recovery area if it is
   large enough
 */
-static int tdb1_recovery_allocate(struct tdb1_context *tdb,
+static int tdb1_recovery_allocate(struct tdb_context *tdb,
 				 tdb1_len_t *recovery_size,
 				 tdb1_off_t *recovery_offset,
 				 tdb1_len_t *recovery_max_size)
 {
 	struct tdb1_record rec;
-	const struct tdb1_methods *methods = tdb->transaction->io_methods;
+	const struct tdb1_methods *methods = tdb->tdb1.transaction->io_methods;
 	tdb1_off_t recovery_head;
 
 	if (tdb1_recovery_area(tdb, methods, &recovery_head, &rec) == -1) {
@@ -726,25 +745,27 @@ static int tdb1_recovery_allocate(struct tdb1_context *tdb,
 	*recovery_size = tdb1_recovery_size(tdb);
 
 	/* round up to a multiple of page size */
-	*recovery_max_size = TDB1_ALIGN(sizeof(rec) + *recovery_size, tdb->page_size) - sizeof(rec);
+	*recovery_max_size = TDB1_ALIGN(sizeof(rec) + *recovery_size,
+					tdb->tdb1.page_size) - sizeof(rec);
 	*recovery_offset = tdb->file->map_size;
 	recovery_head = *recovery_offset;
 
-	if (methods->tdb1_expand_file(tdb, tdb->transaction->old_map_size,
-				     (tdb->file->map_size - tdb->transaction->old_map_size) +
+	if (methods->tdb1_expand_file(tdb, tdb->tdb1.transaction->old_map_size,
+				     (tdb->file->map_size - tdb->tdb1.transaction->old_map_size) +
 				     sizeof(rec) + *recovery_max_size) == -1) {
 		tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 			   "tdb1_recovery_allocate:"
 			   " failed to create recovery area");
 		return -1;
 	}
+	tdb->stats.transaction_expand_file++;
 
 	/* remap the file (if using mmap) */
 	methods->tdb1_oob(tdb, tdb->file->map_size + 1, 1);
 
 	/* we have to reset the old map size so that we don't try to expand the file
 	   again in the transaction commit, which would destroy the recovery area */
-	tdb->transaction->old_map_size = tdb->file->map_size;
+	tdb->tdb1.transaction->old_map_size = tdb->file->map_size;
 
 	/* write the recovery header offset and sync - we can sync without a race here
 	   as the magic ptr in the recovery record has not been set */
@@ -770,15 +791,15 @@ static int tdb1_recovery_allocate(struct tdb1_context *tdb,
 /*
   setup the recovery data that will be used on a crash during commit
 */
-static int transaction1_setup_recovery(struct tdb1_context *tdb,
+static int transaction1_setup_recovery(struct tdb_context *tdb,
 				       tdb1_off_t *magic_offset)
 {
 	tdb1_len_t recovery_size;
 	unsigned char *data, *p;
-	const struct tdb1_methods *methods = tdb->transaction->io_methods;
+	const struct tdb1_methods *methods = tdb->tdb1.transaction->io_methods;
 	struct tdb1_record *rec;
 	tdb1_off_t recovery_offset, recovery_max_size;
-	tdb1_off_t old_map_size = tdb->transaction->old_map_size;
+	tdb1_off_t old_map_size = tdb->tdb1.transaction->old_map_size;
 	uint32_t magic, tailer;
 	int i;
 
@@ -808,24 +829,24 @@ static int transaction1_setup_recovery(struct tdb1_context *tdb,
 	/* build the recovery data into a single blob to allow us to do a single
 	   large write, which should be more efficient */
 	p = data + sizeof(*rec);
-	for (i=0;i<tdb->transaction->num_blocks;i++) {
+	for (i=0;i<tdb->tdb1.transaction->num_blocks;i++) {
 		tdb1_off_t offset;
 		tdb1_len_t length;
 
-		if (tdb->transaction->blocks[i] == NULL) {
+		if (tdb->tdb1.transaction->blocks[i] == NULL) {
 			continue;
 		}
 
-		offset = i * tdb->transaction->block_size;
-		length = tdb->transaction->block_size;
-		if (i == tdb->transaction->num_blocks-1) {
-			length = tdb->transaction->last_block_size;
+		offset = i * tdb->tdb1.transaction->block_size;
+		length = tdb->tdb1.transaction->block_size;
+		if (i == tdb->tdb1.transaction->num_blocks-1) {
+			length = tdb->tdb1.transaction->last_block_size;
 		}
 
 		if (offset >= old_map_size) {
 			continue;
 		}
-		if (offset + length > tdb->transaction->old_map_size) {
+		if (offset + length > tdb->tdb1.transaction->old_map_size) {
 			tdb->last_error = tdb_logerr(tdb, TDB_ERR_CORRUPT,
 						TDB_LOG_ERROR,
 						"tdb1_transaction_setup_recovery: transaction data over new region boundary");
@@ -907,18 +928,18 @@ static int transaction1_setup_recovery(struct tdb1_context *tdb,
 	return 0;
 }
 
-static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
+static int _tdb1_transaction_prepare_commit(struct tdb_context *tdb)
 {
 	const struct tdb1_methods *methods;
 
-	if (tdb->transaction == NULL) {
+	if (tdb->tdb1.transaction == NULL) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
 					"tdb1_transaction_prepare_commit:"
 					" no transaction");
 		return -1;
 	}
 
-	if (tdb->transaction->prepared) {
+	if (tdb->tdb1.transaction->prepared) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
 					"tdb1_transaction_prepare_commit:"
 					" transaction already prepared");
@@ -926,7 +947,7 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
 		return -1;
 	}
 
-	if (tdb->transaction->transaction_error) {
+	if (tdb->tdb1.transaction->transaction_error) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
 					"tdb1_transaction_prepare_commit:"
 					" transaction error pending");
@@ -935,16 +956,16 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
 	}
 
 
-	if (tdb->transaction->nesting != 0) {
+	if (tdb->tdb1.transaction->nesting != 0) {
 		return 0;
 	}
 
 	/* check for a null transaction */
-	if (tdb->transaction->blocks == NULL) {
+	if (tdb->tdb1.transaction->blocks == NULL) {
 		return 0;
 	}
 
-	methods = tdb->transaction->io_methods;
+	methods = tdb->tdb1.transaction->io_methods;
 
 	/* if there are any locks pending then the caller has not
 	   nested their locks properly, so fail the transaction */
@@ -979,7 +1000,7 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
 
 	if (!(tdb->flags & TDB_NOSYNC)) {
 		/* write the recovery data to the end of the file */
-		if (transaction1_setup_recovery(tdb, &tdb->transaction->magic_offset) == -1) {
+		if (transaction1_setup_recovery(tdb, &tdb->tdb1.transaction->magic_offset) == -1) {
 			tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 				   "tdb1_transaction_prepare_commit:"
 				   " failed to setup recovery data");
@@ -987,19 +1008,20 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
 		}
 	}
 
-	tdb->transaction->prepared = true;
+	tdb->tdb1.transaction->prepared = true;
 
 	/* expand the file to the new size if needed */
-	if (tdb->file->map_size != tdb->transaction->old_map_size) {
-		if (methods->tdb1_expand_file(tdb, tdb->transaction->old_map_size,
+	if (tdb->file->map_size != tdb->tdb1.transaction->old_map_size) {
+		if (methods->tdb1_expand_file(tdb, tdb->tdb1.transaction->old_map_size,
 					     tdb->file->map_size -
-					     tdb->transaction->old_map_size) == -1) {
+					     tdb->tdb1.transaction->old_map_size) == -1) {
 			tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 				   "tdb1_transaction_prepare_commit:"
 				   " expansion failed");
 			return -1;
 		}
-		tdb->file->map_size = tdb->transaction->old_map_size;
+		tdb->stats.transaction_expand_file++;
+		tdb->file->map_size = tdb->tdb1.transaction->old_map_size;
 		methods->tdb1_oob(tdb, tdb->file->map_size + 1, 1);
 	}
 
@@ -1011,13 +1033,13 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
 /*
    prepare to commit the current transaction
 */
-int tdb1_transaction_prepare_commit(struct tdb1_context *tdb)
+int tdb1_transaction_prepare_commit(struct tdb_context *tdb)
 {
 	return _tdb1_transaction_prepare_commit(tdb);
 }
 
 /* A repack is worthwhile if the largest is less than half total free. */
-static bool repack_worthwhile(struct tdb1_context *tdb)
+static bool repack_worthwhile(struct tdb_context *tdb)
 {
 	tdb1_off_t ptr;
 	struct tdb1_record rec;
@@ -1041,20 +1063,20 @@ static bool repack_worthwhile(struct tdb1_context *tdb)
 /*
   commit the current transaction
 */
-int tdb1_transaction_commit(struct tdb1_context *tdb)
+int tdb1_transaction_commit(struct tdb_context *tdb)
 {
 	const struct tdb1_methods *methods;
 	int i;
 	bool need_repack = false;
 
-	if (tdb->transaction == NULL) {
+	if (tdb->tdb1.transaction == NULL) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
 					"tdb1_transaction_commit:"
 					" no transaction");
 		return -1;
 	}
 
-	if (tdb->transaction->transaction_error) {
+	if (tdb->tdb1.transaction->transaction_error) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
 					"tdb1_transaction_commit:"
 					" transaction error pending");
@@ -1063,18 +1085,18 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
 	}
 
 
-	if (tdb->transaction->nesting != 0) {
-		tdb->transaction->nesting--;
+	if (tdb->tdb1.transaction->nesting != 0) {
+		tdb->tdb1.transaction->nesting--;
 		return 0;
 	}
 
 	/* check for a null transaction */
-	if (tdb->transaction->blocks == NULL) {
+	if (tdb->tdb1.transaction->blocks == NULL) {
 		_tdb1_transaction_cancel(tdb);
 		return 0;
 	}
 
-	if (!tdb->transaction->prepared) {
+	if (!tdb->tdb1.transaction->prepared) {
 		int ret = _tdb1_transaction_prepare_commit(tdb);
 		if (ret) {
 			_tdb1_transaction_cancel(tdb);
@@ -1082,24 +1104,24 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
 		}
 	}
 
-	methods = tdb->transaction->io_methods;
+	methods = tdb->tdb1.transaction->io_methods;
 
 	/* perform all the writes */
-	for (i=0;i<tdb->transaction->num_blocks;i++) {
+	for (i=0;i<tdb->tdb1.transaction->num_blocks;i++) {
 		tdb1_off_t offset;
 		tdb1_len_t length;
 
-		if (tdb->transaction->blocks[i] == NULL) {
+		if (tdb->tdb1.transaction->blocks[i] == NULL) {
 			continue;
 		}
 
-		offset = i * tdb->transaction->block_size;
-		length = tdb->transaction->block_size;
-		if (i == tdb->transaction->num_blocks-1) {
-			length = tdb->transaction->last_block_size;
+		offset = i * tdb->tdb1.transaction->block_size;
+		length = tdb->tdb1.transaction->block_size;
+		if (i == tdb->tdb1.transaction->num_blocks-1) {
+			length = tdb->tdb1.transaction->last_block_size;
 		}
 
-		if (methods->tdb1_write(tdb, offset, tdb->transaction->blocks[i], length) == -1) {
+		if (methods->tdb1_write(tdb, offset, tdb->tdb1.transaction->blocks[i], length) == -1) {
 			tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 				   "tdb1_transaction_commit:"
 				   " write failed during commit");
@@ -1107,7 +1129,7 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
 			/* we've overwritten part of the data and
 			   possibly expanded the file, so we need to
 			   run the crash recovery code */
-			tdb->methods = methods;
+			tdb->tdb1.io = methods;
 			tdb1_transaction_recover(tdb);
 
 			_tdb1_transaction_cancel(tdb);
@@ -1116,16 +1138,16 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
 				   "tdb1_transaction_commit: write failed");
 			return -1;
 		}
-		SAFE_FREE(tdb->transaction->blocks[i]);
+		SAFE_FREE(tdb->tdb1.transaction->blocks[i]);
 	}
 
 	/* Do this before we drop lock or blocks. */
-	if (tdb->transaction->expanded) {
+	if (tdb->tdb1.transaction->expanded) {
 		need_repack = repack_worthwhile(tdb);
 	}
 
-	SAFE_FREE(tdb->transaction->blocks);
-	tdb->transaction->num_blocks = 0;
+	SAFE_FREE(tdb->tdb1.transaction->blocks);
+	tdb->tdb1.transaction->num_blocks = 0;
 
 	/* ensure the new data is on disk */
 	if (transaction1_sync(tdb, 0, tdb->file->map_size) == -1) {
@@ -1152,7 +1174,8 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
 	_tdb1_transaction_cancel(tdb);
 
 	if (need_repack) {
-		return tdb1_repack(tdb);
+		if (tdb_repack(tdb) != 0)
+			return -1;
 	}
 
 	return 0;
@@ -1164,7 +1187,7 @@ int tdb1_transaction_commit(struct tdb1_context *tdb)
   database write access already established (including the open
   lock to prevent new processes attaching)
 */
-int tdb1_transaction_recover(struct tdb1_context *tdb)
+int tdb1_transaction_recover(struct tdb_context *tdb)
 {
 	tdb1_off_t recovery_head, recovery_eof;
 	unsigned char *data, *p;
@@ -1185,7 +1208,7 @@ int tdb1_transaction_recover(struct tdb1_context *tdb)
 	}
 
 	/* read the recovery record */
-	if (tdb->methods->tdb1_read(tdb, recovery_head, &rec,
+	if (tdb->tdb1.io->tdb1_read(tdb, recovery_head, &rec,
 				   sizeof(rec), TDB1_DOCONV()) == -1) {
 		tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 			   "tdb1_transaction_recover:"
@@ -1198,7 +1221,7 @@ int tdb1_transaction_recover(struct tdb1_context *tdb)
 		return 0;
 	}
 
-	if (tdb->read_only) {
+	if (tdb->flags & TDB_RDONLY) {
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
 					"tdb1_transaction_recover:"
 					" attempt to recover read only"
@@ -1217,7 +1240,7 @@ int tdb1_transaction_recover(struct tdb1_context *tdb)
 	}
 
 	/* read the full recovery data */
-	if (tdb->methods->tdb1_read(tdb, recovery_head + sizeof(rec), data,
+	if (tdb->tdb1.io->tdb1_read(tdb, recovery_head + sizeof(rec), data,
 				   rec.data_len, 0) == -1) {
 		tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 			   "tdb1_transaction_recover:"
@@ -1235,7 +1258,7 @@ int tdb1_transaction_recover(struct tdb1_context *tdb)
 		memcpy(&ofs, p, 4);
 		memcpy(&len, p+4, 4);
 
-		if (tdb->methods->tdb1_write(tdb, ofs, p+8, len) == -1) {
+		if (tdb->tdb1.io->tdb1_write(tdb, ofs, p+8, len) == -1) {
 			free(data);
 			tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR,
 				   "tdb1_transaction_recover: failed to recover"
@@ -1288,14 +1311,14 @@ int tdb1_transaction_recover(struct tdb1_context *tdb)
 }
 
 /* Any I/O failures we say "needs recovery". */
-bool tdb1_needs_recovery(struct tdb1_context *tdb)
+tdb_bool_err tdb1_needs_recovery(struct tdb_context *tdb)
 {
 	tdb1_off_t recovery_head;
 	struct tdb1_record rec;
 
 	/* find the recovery area */
 	if (tdb1_ofs_read(tdb, TDB1_RECOVERY_HEAD, &recovery_head) == -1) {
-		return true;
+		return TDB_ERR_TO_OFF(tdb->last_error);
 	}
 
 	if (recovery_head == 0) {
@@ -1304,9 +1327,9 @@ bool tdb1_needs_recovery(struct tdb1_context *tdb)
 	}
 
 	/* read the recovery record */
-	if (tdb->methods->tdb1_read(tdb, recovery_head, &rec,
+	if (tdb->tdb1.io->tdb1_read(tdb, recovery_head, &rec,
 				   sizeof(rec), TDB1_DOCONV()) == -1) {
-		return true;
+		return TDB_ERR_TO_OFF(tdb->last_error);
 	}
 
 	return (rec.magic == TDB1_RECOVERY_MAGIC);