tdb2: move open routines into a separate file (open.c)

Simply tidying up.

ccan/tdb2/open.c

+#include "private.h"
+
+/* all contexts, to ensure no double-opens (fcntl locks don't nest!) */
+static struct tdb_context *tdbs = NULL;
+
+static bool tdb_already_open(dev_t device, ino_t ino)
+{
+	struct tdb_context *i;
+
+	for (i = tdbs; i; i = i->next) {
+		if (i->device == device && i->inode == ino) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static bool read_all(int fd, void *buf, size_t len)
+{
+	while (len) {
+		ssize_t ret;
+		ret = read(fd, buf, len);
+		if (ret < 0)
+			return false;
+		if (ret == 0) {
+			/* ETOOSHORT? */
+			errno = EWOULDBLOCK;
+			return false;
+		}
+		buf = (char *)buf + ret;
+		len -= ret;
+	}
+	return true;
+}
+
+static uint64_t random_number(struct tdb_context *tdb)
+{
+	int fd;
+	uint64_t ret = 0;
+	struct timeval now;
+
+	fd = open("/dev/urandom", O_RDONLY);
+	if (fd >= 0) {
+		if (read_all(fd, &ret, sizeof(ret))) {
+			close(fd);
+			return ret;
+		}
+		close(fd);
+	}
+	/* FIXME: Untested!  Based on Wikipedia protocol description! */
+	fd = open("/dev/egd-pool", O_RDWR);
+	if (fd >= 0) {
+		/* Command is 1, next byte is size we want to read. */
+		char cmd[2] = { 1, sizeof(uint64_t) };
+		if (write(fd, cmd, sizeof(cmd)) == sizeof(cmd)) {
+			char reply[1 + sizeof(uint64_t)];
+			int r = read(fd, reply, sizeof(reply));
+			if (r > 1) {
+				/* Copy at least some bytes. */
+				memcpy(&ret, reply+1, r - 1);
+				if (reply[0] == sizeof(uint64_t)
+				    && r == sizeof(reply)) {
+					close(fd);
+					return ret;
+				}
+			}
+		}
+		close(fd);
+	}
+
+	/* Fallback: pid and time. */
+	gettimeofday(&now, NULL);
+	ret = getpid() * 100132289ULL + now.tv_sec * 1000000ULL + now.tv_usec;
+	tdb_logerr(tdb, TDB_SUCCESS, TDB_LOG_WARNING,
+		   "tdb_open: random from getpid and time");
+	return ret;
+}
+
+struct new_database {
+	struct tdb_header hdr;
+	struct tdb_freetable ftable;
+};
+
+/* initialise a new database */
+static enum TDB_ERROR tdb_new_database(struct tdb_context *tdb,
+				       struct tdb_attribute_seed *seed,
+				       struct tdb_header *hdr)
+{
+	/* We make it up in memory, then write it out if not internal */
+	struct new_database newdb;
+	unsigned int magic_len;
+	ssize_t rlen;
+	enum TDB_ERROR ecode;
+
+	/* Fill in the header */
+	newdb.hdr.version = TDB_VERSION;
+	if (seed)
+		newdb.hdr.hash_seed = seed->seed;
+	else
+		newdb.hdr.hash_seed = random_number(tdb);
+	newdb.hdr.hash_test = TDB_HASH_MAGIC;
+	newdb.hdr.hash_test = tdb->khash(&newdb.hdr.hash_test,
+					 sizeof(newdb.hdr.hash_test),
+					 newdb.hdr.hash_seed,
+					 tdb->hash_priv);
+	newdb.hdr.recovery = 0;
+	newdb.hdr.features_used = newdb.hdr.features_offered = TDB_FEATURE_MASK;
+	memset(newdb.hdr.reserved, 0, sizeof(newdb.hdr.reserved));
+	/* Initial hashes are empty. */
+	memset(newdb.hdr.hashtable, 0, sizeof(newdb.hdr.hashtable));
+
+	/* Free is empty. */
+	newdb.hdr.free_table = offsetof(struct new_database, ftable);
+	memset(&newdb.ftable, 0, sizeof(newdb.ftable));
+	ecode = set_header(NULL, &newdb.ftable.hdr, TDB_FTABLE_MAGIC, 0,
+			   sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
+			   sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
+			   0);
+	if (ecode != TDB_SUCCESS) {
+		return ecode;
+	}
+
+	/* Magic food */
+	memset(newdb.hdr.magic_food, 0, sizeof(newdb.hdr.magic_food));
+	strcpy(newdb.hdr.magic_food, TDB_MAGIC_FOOD);
+
+	/* This creates an endian-converted database, as if read from disk */
+	magic_len = sizeof(newdb.hdr.magic_food);
+	tdb_convert(tdb,
+		    (char *)&newdb.hdr + magic_len, sizeof(newdb) - magic_len);
+
+	*hdr = newdb.hdr;
+
+	if (tdb->flags & TDB_INTERNAL) {
+		tdb->map_size = sizeof(newdb);
+		tdb->map_ptr = malloc(tdb->map_size);
+		if (!tdb->map_ptr) {
+			return tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+					  "tdb_new_database:"
+					  " failed to allocate");
+		}
+		memcpy(tdb->map_ptr, &newdb, tdb->map_size);
+		return TDB_SUCCESS;
+	}
+	if (lseek(tdb->fd, 0, SEEK_SET) == -1) {
+		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				  "tdb_new_database:"
+				  " failed to seek: %s", strerror(errno));
+	}
+
+	if (ftruncate(tdb->fd, 0) == -1) {
+		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				  "tdb_new_database:"
+				  " failed to truncate: %s", strerror(errno));
+	}
+
+	rlen = write(tdb->fd, &newdb, sizeof(newdb));
+	if (rlen != sizeof(newdb)) {
+		if (rlen >= 0)
+			errno = ENOSPC;
+		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				  "tdb_new_database: %zi writing header: %s",
+				  rlen, strerror(errno));
+	}
+	return TDB_SUCCESS;
+}
+
+struct tdb_context *tdb_open(const char *name, int tdb_flags,
+			     int open_flags, mode_t mode,
+			     union tdb_attribute *attr)
+{
+	struct tdb_context *tdb;
+	struct stat st;
+	int saved_errno = 0;
+	uint64_t hash_test;
+	unsigned v;
+	ssize_t rlen;
+	struct tdb_header hdr;
+	struct tdb_attribute_seed *seed = NULL;
+	tdb_bool_err berr;
+	enum TDB_ERROR ecode;
+
+	tdb = malloc(sizeof(*tdb));
+	if (!tdb) {
+		/* Can't log this */
+		errno = ENOMEM;
+		return NULL;
+	}
+	tdb->name = NULL;
+	tdb->map_ptr = NULL;
+	tdb->direct_access = 0;
+	tdb->fd = -1;
+	tdb->map_size = sizeof(struct tdb_header);
+	tdb->flags = tdb_flags;
+	tdb->logfn = NULL;
+	tdb->transaction = NULL;
+	tdb->stats = NULL;
+	tdb->access = NULL;
+	tdb_hash_init(tdb);
+	tdb_io_init(tdb);
+	tdb_lock_init(tdb);
+
+	while (attr) {
+		switch (attr->base.attr) {
+		case TDB_ATTRIBUTE_LOG:
+			tdb->logfn = attr->log.log_fn;
+			tdb->log_private = attr->log.log_private;
+			break;
+		case TDB_ATTRIBUTE_HASH:
+			tdb->khash = attr->hash.hash_fn;
+			tdb->hash_priv = attr->hash.hash_private;
+			break;
+		case TDB_ATTRIBUTE_SEED:
+			seed = &attr->seed;
+			break;
+		case TDB_ATTRIBUTE_STATS:
+			tdb->stats = &attr->stats;
+			/* They have stats we don't know about?  Tell them. */
+			if (tdb->stats->size > sizeof(attr->stats))
+				tdb->stats->size = sizeof(attr->stats);
+			break;
+		default:
+			ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
+					   TDB_LOG_USE_ERROR,
+					   "tdb_open:"
+					   " unknown attribute type %u",
+					   attr->base.attr);
+			goto fail;
+		}
+		attr = attr->base.next;
+	}
+
+	if (tdb_flags & ~(TDB_INTERNAL | TDB_NOLOCK | TDB_NOMMAP | TDB_CONVERT
+			  | TDB_NOSYNC)) {
+		ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+				   "tdb_open: unknown flags %u", tdb_flags);
+		goto fail;
+	}
+
+	if ((open_flags & O_ACCMODE) == O_WRONLY) {
+		ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+				   "tdb_open: can't open tdb %s write-only",
+				   name);
+		goto fail;
+	}
+
+	if ((open_flags & O_ACCMODE) == O_RDONLY) {
+		tdb->read_only = true;
+		tdb->mmap_flags = PROT_READ;
+	} else {
+		tdb->read_only = false;
+		tdb->mmap_flags = PROT_READ | PROT_WRITE;
+	}
+
+	/* internal databases don't need any of the rest. */
+	if (tdb->flags & TDB_INTERNAL) {
+		tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
+		ecode = tdb_new_database(tdb, seed, &hdr);
+		if (ecode != TDB_SUCCESS) {
+			goto fail;
+		}
+		tdb_convert(tdb, &hdr.hash_seed, sizeof(hdr.hash_seed));
+		tdb->hash_seed = hdr.hash_seed;
+		tdb_ftable_init(tdb);
+		return tdb;
+	}
+
+	if ((tdb->fd = open(name, open_flags, mode)) == -1) {
+		/* errno set by open(2) */
+		saved_errno = errno;
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: could not open file %s: %s",
+				   name, strerror(errno));
+		goto fail;
+	}
+
+	/* on exec, don't inherit the fd */
+	v = fcntl(tdb->fd, F_GETFD, 0);
+        fcntl(tdb->fd, F_SETFD, v | FD_CLOEXEC);
+
+	/* ensure there is only one process initialising at once */
+	ecode = tdb_lock_open(tdb, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
+	if (ecode != TDB_SUCCESS) {
+		goto fail;
+	}
+
+	/* If they used O_TRUNC, read will return 0. */
+	rlen = read(tdb->fd, &hdr, sizeof(hdr));
+	if (rlen == 0 && (open_flags & O_CREAT)) {
+		ecode = tdb_new_database(tdb, seed, &hdr);
+		if (ecode != TDB_SUCCESS) {
+			goto fail;
+		}
+	} else if (rlen < 0) {
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: error %s reading %s",
+				   strerror(errno), name);
+		goto fail;
+	} else if (rlen < sizeof(hdr)
+		   || strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: %s is not a tdb file", name);
+		goto fail;
+	}
+
+	if (hdr.version != TDB_VERSION) {
+		if (hdr.version == bswap_64(TDB_VERSION))
+			tdb->flags |= TDB_CONVERT;
+		else {
+			/* wrong version */
+			ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+					   "tdb_open:"
+					   " %s is unknown version 0x%llx",
+					   name, (long long)hdr.version);
+			goto fail;
+		}
+	}
+
+	tdb_convert(tdb, &hdr, sizeof(hdr));
+	tdb->hash_seed = hdr.hash_seed;
+	hash_test = TDB_HASH_MAGIC;
+	hash_test = tdb_hash(tdb, &hash_test, sizeof(hash_test));
+	if (hdr.hash_test != hash_test) {
+		/* wrong hash variant */
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open:"
+				   " %s uses a different hash function",
+				   name);
+		goto fail;
+	}
+
+	if (fstat(tdb->fd, &st) == -1) {
+		saved_errno = errno;
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: could not stat open %s: %s",
+				   name, strerror(errno));
+		goto fail;
+	}
+
+	/* Is it already in the open list?  If so, fail. */
+	if (tdb_already_open(st.st_dev, st.st_ino)) {
+		/* FIXME */
+		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_USE_ERROR,
+				   "tdb_open: %s (%d,%d) is already open"
+				   " in this process",
+				   name, (int)st.st_dev, (int)st.st_ino);
+		goto fail;
+	}
+
+	tdb->name = strdup(name);
+	if (!tdb->name) {
+		ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+				   "tdb_open: failed to allocate name");
+		goto fail;
+	}
+
+	/* Clear any features we don't understand. */
+ 	if ((open_flags & O_ACCMODE) != O_RDONLY) {
+		hdr.features_used &= TDB_FEATURE_MASK;
+		if (tdb_write_convert(tdb, offsetof(struct tdb_header,
+						    features_used),
+				      &hdr.features_used,
+				      sizeof(hdr.features_used)) == -1)
+			goto fail;
+	}
+
+	tdb->device = st.st_dev;
+	tdb->inode = st.st_ino;
+	tdb_unlock_open(tdb);
+
+	/* This make sure we have current map_size and mmap. */
+	tdb->methods->oob(tdb, tdb->map_size + 1, true);
+
+	/* Now it's fully formed, recover if necessary. */
+	berr = tdb_needs_recovery(tdb);
+	if (unlikely(berr != false)) {
+		if (berr < 0) {
+			ecode = berr;
+			goto fail;
+		}
+		ecode = tdb_lock_and_recover(tdb);
+		if (ecode != TDB_SUCCESS) {
+			goto fail;
+		}
+	}
+
+	ecode = tdb_ftable_init(tdb);
+	if (ecode != TDB_SUCCESS) {
+		goto fail;
+	}
+
+	tdb->next = tdbs;
+	tdbs = tdb;
+	return tdb;
+
+ fail:
+	/* Map ecode to some logical errno. */
+	if (!saved_errno) {
+		switch (ecode) {
+		case TDB_ERR_CORRUPT:
+		case TDB_ERR_IO:
+			saved_errno = EIO;
+			break;
+		case TDB_ERR_LOCK:
+			saved_errno = EWOULDBLOCK;
+			break;
+		case TDB_ERR_OOM:
+			saved_errno = ENOMEM;
+			break;
+		case TDB_ERR_EINVAL:
+			saved_errno = EINVAL;
+			break;
+		default:
+			saved_errno = EINVAL;
+			break;
+		}
+	}
+
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
+	if (tdb->map_ptr) {
+		if (tdb->flags & TDB_INTERNAL) {
+			free(tdb->map_ptr);
+		} else
+			tdb_munmap(tdb);
+	}
+	free(tdb->lockrecs);
+	free((char *)tdb->name);
+	if (tdb->fd != -1)
+		if (close(tdb->fd) != 0)
+			tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: failed to close tdb->fd"
+				   " on error: %s", strerror(errno));
+	free(tdb);
+	errno = saved_errno;
+	return NULL;
+}
+
+int tdb_close(struct tdb_context *tdb)
+{
+	struct tdb_context **i;
+	int ret = 0;
+
+	tdb_trace(tdb, "tdb_close");
+
+	if (tdb->transaction) {
+		tdb_transaction_cancel(tdb);
+	}
+
+	if (tdb->map_ptr) {
+		if (tdb->flags & TDB_INTERNAL)
+			free(tdb->map_ptr);
+		else
+			tdb_munmap(tdb);
+	}
+	free((char *)tdb->name);
+	if (tdb->fd != -1) {
+		ret = close(tdb->fd);
+		tdb->fd = -1;
+	}
+	free(tdb->lockrecs);
+
+	/* Remove from contexts list */
+	for (i = &tdbs; *i; i = &(*i)->next) {
+		if (*i == tdb) {
+			*i = tdb->next;
+			break;
+		}
+	}
+
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
+	free(tdb);
+
+	return ret;
+}

ccan/tdb2/tdb.c

 #include "private.h"
 #include <ccan/asprintf/asprintf.h>
-#include <ccan/tdb2/tdb2.h>
-#include <assert.h>
 #include <stdarg.h>
 
 /* The null return. */
 struct tdb_data tdb_null = { .dptr = NULL, .dsize = 0 };
 
-/* all contexts, to ensure no double-opens (fcntl locks don't nest!) */
-static struct tdb_context *tdbs = NULL;
-
-static bool tdb_already_open(dev_t device, ino_t ino)
-{
-	struct tdb_context *i;
-	
-	for (i = tdbs; i; i = i->next) {
-		if (i->device == device && i->inode == ino) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
-static bool read_all(int fd, void *buf, size_t len)
-{
-	while (len) {
-		ssize_t ret;
-		ret = read(fd, buf, len);
-		if (ret < 0)
-			return false;
-		if (ret == 0) {
-			/* ETOOSHORT? */
-			errno = EWOULDBLOCK;
-			return false;
-		}
-		buf = (char *)buf + ret;
-		len -= ret;
-	}
-	return true;
-}
-
-static uint64_t random_number(struct tdb_context *tdb)
-{
-	int fd;
-	uint64_t ret = 0;
-	struct timeval now;
-
-	fd = open("/dev/urandom", O_RDONLY);
-	if (fd >= 0) {
-		if (read_all(fd, &ret, sizeof(ret))) {
-			close(fd);
-			return ret;
-		}
-		close(fd);
-	}
-	/* FIXME: Untested!  Based on Wikipedia protocol description! */
-	fd = open("/dev/egd-pool", O_RDWR);
-	if (fd >= 0) {
-		/* Command is 1, next byte is size we want to read. */
-		char cmd[2] = { 1, sizeof(uint64_t) };
-		if (write(fd, cmd, sizeof(cmd)) == sizeof(cmd)) {
-			char reply[1 + sizeof(uint64_t)];
-			int r = read(fd, reply, sizeof(reply));
-			if (r > 1) {
-				/* Copy at least some bytes. */
-				memcpy(&ret, reply+1, r - 1);
-				if (reply[0] == sizeof(uint64_t)
-				    && r == sizeof(reply)) {
-					close(fd);
-					return ret;
-				}
-			}
-		}
-		close(fd);
-	}
-
-	/* Fallback: pid and time. */
-	gettimeofday(&now, NULL);
-	ret = getpid() * 100132289ULL + now.tv_sec * 1000000ULL + now.tv_usec;
-	tdb_logerr(tdb, TDB_SUCCESS, TDB_LOG_WARNING,
-		   "tdb_open: random from getpid and time");
-	return ret;
-}
-
-struct new_database {
-	struct tdb_header hdr;
-	struct tdb_freetable ftable;
-};
-
-/* initialise a new database */
-static enum TDB_ERROR tdb_new_database(struct tdb_context *tdb,
-				       struct tdb_attribute_seed *seed,
-				       struct tdb_header *hdr)
-{
-	/* We make it up in memory, then write it out if not internal */
-	struct new_database newdb;
-	unsigned int magic_len;
-	ssize_t rlen;
-	enum TDB_ERROR ecode;
-
-	/* Fill in the header */
-	newdb.hdr.version = TDB_VERSION;
-	if (seed)
-		newdb.hdr.hash_seed = seed->seed;
-	else
-		newdb.hdr.hash_seed = random_number(tdb);
-	newdb.hdr.hash_test = TDB_HASH_MAGIC;
-	newdb.hdr.hash_test = tdb->khash(&newdb.hdr.hash_test,
-					 sizeof(newdb.hdr.hash_test),
-					 newdb.hdr.hash_seed,
-					 tdb->hash_priv);
-	newdb.hdr.recovery = 0;
-	newdb.hdr.features_used = newdb.hdr.features_offered = TDB_FEATURE_MASK;
-	memset(newdb.hdr.reserved, 0, sizeof(newdb.hdr.reserved));
-	/* Initial hashes are empty. */
-	memset(newdb.hdr.hashtable, 0, sizeof(newdb.hdr.hashtable));
-
-	/* Free is empty. */
-	newdb.hdr.free_table = offsetof(struct new_database, ftable);
-	memset(&newdb.ftable, 0, sizeof(newdb.ftable));
-	ecode = set_header(NULL, &newdb.ftable.hdr, TDB_FTABLE_MAGIC, 0,
-			   sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
-			   sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
-			   0);
-	if (ecode != TDB_SUCCESS) {
-		return ecode;
-	}
-
-	/* Magic food */
-	memset(newdb.hdr.magic_food, 0, sizeof(newdb.hdr.magic_food));
-	strcpy(newdb.hdr.magic_food, TDB_MAGIC_FOOD);
-
-	/* This creates an endian-converted database, as if read from disk */
-	magic_len = sizeof(newdb.hdr.magic_food);
-	tdb_convert(tdb,
-		    (char *)&newdb.hdr + magic_len, sizeof(newdb) - magic_len);
-
-	*hdr = newdb.hdr;
-
-	if (tdb->flags & TDB_INTERNAL) {
-		tdb->map_size = sizeof(newdb);
-		tdb->map_ptr = malloc(tdb->map_size);
-		if (!tdb->map_ptr) {
-			return tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
-					  "tdb_new_database:"
-					  " failed to allocate");
-		}
-		memcpy(tdb->map_ptr, &newdb, tdb->map_size);
-		return TDB_SUCCESS;
-	}
-	if (lseek(tdb->fd, 0, SEEK_SET) == -1) {
-		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				  "tdb_new_database:"
-				  " failed to seek: %s", strerror(errno));
-	}
-
-	if (ftruncate(tdb->fd, 0) == -1) {
-		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				  "tdb_new_database:"
-				  " failed to truncate: %s", strerror(errno));
-	}
-
-	rlen = write(tdb->fd, &newdb, sizeof(newdb));
-	if (rlen != sizeof(newdb)) {
-		if (rlen >= 0)
-			errno = ENOSPC;
-		return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				  "tdb_new_database: %zi writing header: %s",
-				  rlen, strerror(errno));
-	}
-	return TDB_SUCCESS;
-}
-
-struct tdb_context *tdb_open(const char *name, int tdb_flags,
-			     int open_flags, mode_t mode,
-			     union tdb_attribute *attr)
-{
-	struct tdb_context *tdb;
-	struct stat st;
-	int saved_errno = 0;
-	uint64_t hash_test;
-	unsigned v;
-	ssize_t rlen;
-	struct tdb_header hdr;
-	struct tdb_attribute_seed *seed = NULL;
-	tdb_bool_err berr;
-	enum TDB_ERROR ecode;
-
-	tdb = malloc(sizeof(*tdb));
-	if (!tdb) {
-		/* Can't log this */
-		errno = ENOMEM;
-		return NULL;
-	}
-	tdb->name = NULL;
-	tdb->map_ptr = NULL;
-	tdb->direct_access = 0;
-	tdb->fd = -1;
-	tdb->map_size = sizeof(struct tdb_header);
-	tdb->flags = tdb_flags;
-	tdb->logfn = NULL;
-	tdb->transaction = NULL;
-	tdb->stats = NULL;
-	tdb->access = NULL;
-	tdb_hash_init(tdb);
-	tdb_io_init(tdb);
-	tdb_lock_init(tdb);
-
-	while (attr) {
-		switch (attr->base.attr) {
-		case TDB_ATTRIBUTE_LOG:
-			tdb->logfn = attr->log.log_fn;
-			tdb->log_private = attr->log.log_private;
-			break;
-		case TDB_ATTRIBUTE_HASH:
-			tdb->khash = attr->hash.hash_fn;
-			tdb->hash_priv = attr->hash.hash_private;
-			break;
-		case TDB_ATTRIBUTE_SEED:
-			seed = &attr->seed;
-			break;
-		case TDB_ATTRIBUTE_STATS:
-			tdb->stats = &attr->stats;
-			/* They have stats we don't know about?  Tell them. */
-			if (tdb->stats->size > sizeof(attr->stats))
-				tdb->stats->size = sizeof(attr->stats);
-			break;
-		default:
-			ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
-					   TDB_LOG_USE_ERROR,
-					   "tdb_open:"
-					   " unknown attribute type %u",
-					   attr->base.attr);
-			goto fail;
-		}
-		attr = attr->base.next;
-	}
-
-	if (tdb_flags & ~(TDB_INTERNAL | TDB_NOLOCK | TDB_NOMMAP | TDB_CONVERT
-			  | TDB_NOSYNC)) {
-		ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
-				   "tdb_open: unknown flags %u", tdb_flags);
-		goto fail;
-	}
-
-	if ((open_flags & O_ACCMODE) == O_WRONLY) {
-		ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
-				   "tdb_open: can't open tdb %s write-only",
-				   name);
-		goto fail;
-	}
-
-	if ((open_flags & O_ACCMODE) == O_RDONLY) {
-		tdb->read_only = true;
-		tdb->mmap_flags = PROT_READ;
-	} else {
-		tdb->read_only = false;
-		tdb->mmap_flags = PROT_READ | PROT_WRITE;
-	}
-
-	/* internal databases don't need any of the rest. */
-	if (tdb->flags & TDB_INTERNAL) {
-		tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
-		ecode = tdb_new_database(tdb, seed, &hdr);
-		if (ecode != TDB_SUCCESS) {
-			goto fail;
-		}
-		tdb_convert(tdb, &hdr.hash_seed, sizeof(hdr.hash_seed));
-		tdb->hash_seed = hdr.hash_seed;
-		tdb_ftable_init(tdb);
-		return tdb;
-	}
-
-	if ((tdb->fd = open(name, open_flags, mode)) == -1) {
-		/* errno set by open(2) */
-		saved_errno = errno;
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open: could not open file %s: %s",
-				   name, strerror(errno));
-		goto fail;
-	}
-
-	/* on exec, don't inherit the fd */
-	v = fcntl(tdb->fd, F_GETFD, 0);
-        fcntl(tdb->fd, F_SETFD, v | FD_CLOEXEC);
-
-	/* ensure there is only one process initialising at once */
-	ecode = tdb_lock_open(tdb, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
-	if (ecode != TDB_SUCCESS) {
-		goto fail;
-	}
-
-	/* If they used O_TRUNC, read will return 0. */
-	rlen = read(tdb->fd, &hdr, sizeof(hdr));
-	if (rlen == 0 && (open_flags & O_CREAT)) {
-		ecode = tdb_new_database(tdb, seed, &hdr);
-		if (ecode != TDB_SUCCESS) {
-			goto fail;
-		}
-	} else if (rlen < 0) {
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open: error %s reading %s",
-				   strerror(errno), name);
-		goto fail;
-	} else if (rlen < sizeof(hdr)
-		   || strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open: %s is not a tdb file", name);
-		goto fail;
-	}
-
-	if (hdr.version != TDB_VERSION) {
-		if (hdr.version == bswap_64(TDB_VERSION))
-			tdb->flags |= TDB_CONVERT;
-		else {
-			/* wrong version */
-			ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-					   "tdb_open:"
-					   " %s is unknown version 0x%llx",
-					   name, (long long)hdr.version);
-			goto fail;
-		}
-	}
-
-	tdb_convert(tdb, &hdr, sizeof(hdr));
-	tdb->hash_seed = hdr.hash_seed;
-	hash_test = TDB_HASH_MAGIC;
-	hash_test = tdb_hash(tdb, &hash_test, sizeof(hash_test));
-	if (hdr.hash_test != hash_test) {
-		/* wrong hash variant */
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open:"
-				   " %s uses a different hash function",
-				   name);
-		goto fail;
-	}
-
-	if (fstat(tdb->fd, &st) == -1) {
-		saved_errno = errno;
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open: could not stat open %s: %s",
-				   name, strerror(errno));
-		goto fail;
-	}
-
-	/* Is it already in the open list?  If so, fail. */
-	if (tdb_already_open(st.st_dev, st.st_ino)) {
-		/* FIXME */
-		ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_USE_ERROR,
-				   "tdb_open: %s (%d,%d) is already open"
-				   " in this process",
-				   name, (int)st.st_dev, (int)st.st_ino);
-		goto fail;
-	}
-
-	tdb->name = strdup(name);
-	if (!tdb->name) {
-		ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
-				   "tdb_open: failed to allocate name");
-		goto fail;
-	}
-
-	/* Clear any features we don't understand. */
- 	if ((open_flags & O_ACCMODE) != O_RDONLY) {
-		hdr.features_used &= TDB_FEATURE_MASK;
-		if (tdb_write_convert(tdb, offsetof(struct tdb_header,
-						    features_used),
-				      &hdr.features_used,
-				      sizeof(hdr.features_used)) == -1)
-			goto fail;
-	}
-
-	tdb->device = st.st_dev;
-	tdb->inode = st.st_ino;
-	tdb_unlock_open(tdb);
-
-	/* This make sure we have current map_size and mmap. */
-	tdb->methods->oob(tdb, tdb->map_size + 1, true);
-
-	/* Now it's fully formed, recover if necessary. */
-	berr = tdb_needs_recovery(tdb);
-	if (unlikely(berr != false)) {
-		if (berr < 0) {
-			ecode = berr;
-			goto fail;
-		}
-		ecode = tdb_lock_and_recover(tdb);
-		if (ecode != TDB_SUCCESS) {
-			goto fail;
-		}
-	}
-
-	ecode = tdb_ftable_init(tdb);
-	if (ecode != TDB_SUCCESS) {
-		goto fail;
-	}
-
-	tdb->next = tdbs;
-	tdbs = tdb;
-	return tdb;
-
- fail:
-	/* Map ecode to some logical errno. */
-	if (!saved_errno) {
-		switch (ecode) {
-		case TDB_ERR_CORRUPT:
-		case TDB_ERR_IO:
-			saved_errno = EIO;
-			break;
-		case TDB_ERR_LOCK:
-			saved_errno = EWOULDBLOCK;
-			break;
-		case TDB_ERR_OOM:
-			saved_errno = ENOMEM;
-			break;
-		case TDB_ERR_EINVAL:
-			saved_errno = EINVAL;
-			break;
-		default:
-			saved_errno = EINVAL;
-			break;
-		}
-	}
-
-#ifdef TDB_TRACE
-	close(tdb->tracefd);
-#endif
-	if (tdb->map_ptr) {
-		if (tdb->flags & TDB_INTERNAL) {
-			free(tdb->map_ptr);
-		} else
-			tdb_munmap(tdb);
-	}
-	free(tdb->lockrecs);
-	free((char *)tdb->name);
-	if (tdb->fd != -1)
-		if (close(tdb->fd) != 0)
-			tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
-				   "tdb_open: failed to close tdb->fd"
-				   " on error: %s", strerror(errno));
-	free(tdb);
-	errno = saved_errno;
-	return NULL;
-}
-
 static enum TDB_ERROR update_rec_hdr(struct tdb_context *tdb,
 				     tdb_off_t off,
 				     tdb_len_t keylen,
@@ -718,46 +278,6 @@ unlock:
 	return ecode;
 }
 
-int tdb_close(struct tdb_context *tdb)
-{
-	struct tdb_context **i;
-	int ret = 0;
-
-	tdb_trace(tdb, "tdb_close");
-
-	if (tdb->transaction) {
-		tdb_transaction_cancel(tdb);
-	}
-
-	if (tdb->map_ptr) {
-		if (tdb->flags & TDB_INTERNAL)
-			free(tdb->map_ptr);
-		else
-			tdb_munmap(tdb);
-	}
-	free((char *)tdb->name);
-	if (tdb->fd != -1) {
-		ret = close(tdb->fd);
-		tdb->fd = -1;
-	}
-	free(tdb->lockrecs);
-
-	/* Remove from contexts list */
-	for (i = &tdbs; *i; i = &(*i)->next) {
-		if (*i == tdb) {
-			*i = tdb->next;
-			break;
-		}
-	}
-
-#ifdef TDB_TRACE
-	close(tdb->tracefd);
-#endif
-	free(tdb);
-
-	return ret;
-}
-
 unsigned int tdb_get_flags(struct tdb_context *tdb)
 {
 	return tdb->flags;

ccan/tdb2/test/failtest_helper.h

@@ -4,9 +4,9 @@
 #include <stdbool.h>
 
 /* FIXME: Check these! */
-#define INITIAL_TDB_MALLOC	"tdb.c", 191, FAILTEST_MALLOC
-#define URANDOM_OPEN		"tdb.c", 49, FAILTEST_OPEN
-#define URANDOM_READ		"tdb.c", 29, FAILTEST_READ
+#define INITIAL_TDB_MALLOC	"open.c", 184, FAILTEST_MALLOC
+#define URANDOM_OPEN		"open.c", 43, FAILTEST_OPEN
+#define URANDOM_READ		"open.c", 23, FAILTEST_READ
 
 bool exit_check_log(struct failtest_call *history, unsigned num);
 bool failmatch(const struct failtest_call *call,

ccan/tdb2/test/run-001-encode.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/hash.c>

ccan/tdb2/test/run-001-fls.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-01-new_database.c

 #include <ccan/failtest/failtest_override.h>
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-02-expand.c

 #include <ccan/failtest/failtest_override.h>
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-03-coalesce.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-04-basichash.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-10-simple-store.c

 #include <ccan/failtest/failtest_override.h>
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-11-simple-fetch.c

 #include <ccan/failtest/failtest_override.h>
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-12-store.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-13-delete.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-15-append.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-20-growhash.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-25-hashoverload.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-30-exhaust-before-expand.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-50-multiple-freelists.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-55-transaction.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-56-open-during-transaction.c

@@ -12,6 +12,7 @@ static int ftruncate_check(int fd, off_t length);
 #define ftruncate ftruncate_check
 
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-57-die-during-transaction.c

@@ -59,6 +59,7 @@ static void free_all(void)
 #define free free_noleak
 
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-add-remove-flags.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-features.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-firstkey-nextkey.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-missing-entries.c

 /* Another test revealed that we lost an entry.  This reproduces it. */
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-record-expand.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-remap-in-read_traverse.c

 /* We had a bug where we marked the tdb read-only for a tdb_traverse_read.
  * If we then expanded the tdb, we would remap read-only, and later SEGV. */
 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-seed.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-simple-delete.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-summary.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-tdb_errorstr.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>

ccan/tdb2/test/run-traverse.c

 #include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
 #include <ccan/tdb2/io.c>