From d24ddb0350ddb402bd9d219e129439cdbd77ecfe Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 20 Jun 2011 18:40:33 +0930
Subject: tdb2: add lib/tdb2 (from CCAN init-1161-g661d41f)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 lib/tdb2/open.c | 661 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 661 insertions(+)
 create mode 100644 lib/tdb2/open.c

(limited to 'lib/tdb2/open.c')

diff --git a/lib/tdb2/open.c b/lib/tdb2/open.c
new file mode 100644
index 0000000000..c35598cdcc
--- /dev/null
+++ b/lib/tdb2/open.c
@@ -0,0 +1,661 @@
+#include "private.h"
+#include <ccan/hash/hash.h>
+#include <assert.h>
+
+/* all lock info, to detect double-opens (fcntl file don't nest!) */
+static struct tdb_file *files = NULL;
+
+static struct tdb_file *find_file(dev_t device, ino_t ino)
+{
+	struct tdb_file *i;
+
+	for (i = files; i; i = i->next) {
+		if (i->device == device && i->inode == ino) {
+			i->refcnt++;
+			break;
+		}
+	}
+	return i;
+}
+
+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->hash_fn(&newdb.hdr.hash_test,
+					   sizeof(newdb.hdr.hash_test),
+					   newdb.hdr.hash_seed,
+					   tdb->hash_data);
+	newdb.hdr.recovery = 0;
+	newdb.hdr.features_used = newdb.hdr.features_offered = TDB_FEATURE_MASK;
+	newdb.hdr.seqnum = 0;
+	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->file->map_size = sizeof(newdb);
+		tdb->file->map_ptr = malloc(tdb->file->map_size);
+		if (!tdb->file->map_ptr) {
+			return tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+					  "tdb_new_database:"
+					  " failed to allocate");
+		}
+		memcpy(tdb->file->map_ptr, &newdb, tdb->file->map_size);
+		return TDB_SUCCESS;
+	}
+	if (lseek(tdb->file->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->file->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->file->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;
+}
+
+static enum TDB_ERROR tdb_new_file(struct tdb_context *tdb)
+{
+	tdb->file = malloc(sizeof(*tdb->file));
+	if (!tdb->file)
+		return tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+				  "tdb_open: cannot alloc tdb_file structure");
+	tdb->file->num_lockrecs = 0;
+	tdb->file->lockrecs = NULL;
+	tdb->file->allrecord_lock.count = 0;
+	tdb->file->refcnt = 1;
+	return TDB_SUCCESS;
+}
+
+enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
+				 const union tdb_attribute *attr)
+{
+	switch (attr->base.attr) {
+	case TDB_ATTRIBUTE_LOG:
+		tdb->log_fn = attr->log.fn;
+		tdb->log_data = attr->log.data;
+		break;
+	case TDB_ATTRIBUTE_HASH:
+	case TDB_ATTRIBUTE_SEED:
+	case TDB_ATTRIBUTE_OPENHOOK:
+		return tdb->last_error
+			= tdb_logerr(tdb, TDB_ERR_EINVAL,
+				     TDB_LOG_USE_ERROR,
+				     "tdb_set_attribute:"
+				     " cannot set %s after opening",
+				     attr->base.attr == TDB_ATTRIBUTE_HASH
+				     ? "TDB_ATTRIBUTE_HASH"
+				     : attr->base.attr == TDB_ATTRIBUTE_SEED
+				     ? "TDB_ATTRIBUTE_SEED"
+				     : "TDB_ATTRIBUTE_OPENHOOK");
+	case TDB_ATTRIBUTE_STATS:
+		return tdb->last_error
+			= tdb_logerr(tdb, TDB_ERR_EINVAL,
+				     TDB_LOG_USE_ERROR,
+				     "tdb_set_attribute:"
+				     " cannot set TDB_ATTRIBUTE_STATS");
+	case TDB_ATTRIBUTE_FLOCK:
+		tdb->lock_fn = attr->flock.lock;
+		tdb->unlock_fn = attr->flock.unlock;
+		tdb->lock_data = attr->flock.data;
+		break;
+	default:
+		return tdb->last_error
+			= tdb_logerr(tdb, TDB_ERR_EINVAL,
+				     TDB_LOG_USE_ERROR,
+				     "tdb_set_attribute:"
+				     " unknown attribute type %u",
+				     attr->base.attr);
+	}
+	return TDB_SUCCESS;
+}
+
+static uint64_t jenkins_hash(const void *key, size_t length, uint64_t seed,
+			     void *unused)
+{
+	uint64_t ret;
+	/* hash64_stable assumes lower bits are more important; they are a
+	 * slightly better hash.  We use the upper bits first, so swap them. */
+	ret = hash64_stable((const unsigned char *)key, length, seed);
+	return (ret >> 32) | (ret << 32);
+}
+
+enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
+				 union tdb_attribute *attr)
+{
+	switch (attr->base.attr) {
+	case TDB_ATTRIBUTE_LOG:
+		if (!tdb->log_fn)
+			return tdb->last_error = TDB_ERR_NOEXIST;
+		attr->log.fn = tdb->log_fn;
+		attr->log.data = tdb->log_data;
+		break;
+	case TDB_ATTRIBUTE_HASH:
+		attr->hash.fn = tdb->hash_fn;
+		attr->hash.data = tdb->hash_data;
+		break;
+	case TDB_ATTRIBUTE_SEED:
+		attr->seed.seed = tdb->hash_seed;
+		break;
+	case TDB_ATTRIBUTE_OPENHOOK:
+		return tdb->last_error
+			= tdb_logerr(tdb, TDB_ERR_EINVAL,
+				     TDB_LOG_USE_ERROR,
+				     "tdb_get_attribute:"
+				     " cannot get TDB_ATTRIBUTE_OPENHOOK");
+	case TDB_ATTRIBUTE_STATS: {
+		size_t size = attr->stats.size;
+		if (size > tdb->stats.size)
+			size = tdb->stats.size;
+		memcpy(&attr->stats, &tdb->stats, size);
+		break;
+	}
+	case TDB_ATTRIBUTE_FLOCK:
+		attr->flock.lock = tdb->lock_fn;
+		attr->flock.unlock = tdb->unlock_fn;
+		attr->flock.data = tdb->lock_data;
+		break;
+	default:
+		return tdb->last_error
+			= tdb_logerr(tdb, TDB_ERR_EINVAL,
+				     TDB_LOG_USE_ERROR,
+				     "tdb_get_attribute:"
+				     " unknown attribute type %u",
+				     attr->base.attr);
+	}
+	attr->base.next = NULL;
+	return TDB_SUCCESS;
+}
+
+void tdb_unset_attribute(struct tdb_context *tdb,
+			 enum tdb_attribute_type type)
+{
+	switch (type) {
+	case TDB_ATTRIBUTE_LOG:
+		tdb->log_fn = NULL;
+		break;
+	case TDB_ATTRIBUTE_HASH:
+	case TDB_ATTRIBUTE_SEED:
+	case TDB_ATTRIBUTE_OPENHOOK:
+		tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+			   "tdb_unset_attribute: cannot unset %s after opening",
+			   type == TDB_ATTRIBUTE_HASH
+			   ? "TDB_ATTRIBUTE_HASH"
+			   : type == TDB_ATTRIBUTE_SEED
+			   ? "TDB_ATTRIBUTE_SEED"
+			   : "TDB_ATTRIBUTE_OPENHOOK");
+		break;
+	case TDB_ATTRIBUTE_STATS:
+		tdb_logerr(tdb, TDB_ERR_EINVAL,
+			   TDB_LOG_USE_ERROR,
+			   "tdb_unset_attribute:"
+			   "cannot unset TDB_ATTRIBUTE_STATS");
+		break;
+	case TDB_ATTRIBUTE_FLOCK:
+		tdb->lock_fn = tdb_fcntl_lock;
+		tdb->unlock_fn = tdb_fcntl_unlock;
+		break;
+	default:
+		tdb_logerr(tdb, TDB_ERR_EINVAL,
+			   TDB_LOG_USE_ERROR,
+			   "tdb_unset_attribute: unknown attribute type %u",
+			   type);
+	}
+}
+
+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;
+	struct tdb_attribute_openhook *openhook = NULL;
+	tdb_bool_err berr;
+	enum TDB_ERROR ecode;
+	int openlock;
+
+	tdb = malloc(sizeof(*tdb) + (name ? strlen(name) + 1 : 0));
+	if (!tdb) {
+		/* Can't log this */
+		errno = ENOMEM;
+		return NULL;
+	}
+	/* Set name immediately for logging functions. */
+	if (name) {
+		tdb->name = strcpy((char *)(tdb + 1), name);
+	} else {
+		tdb->name = NULL;
+	}
+	tdb->direct_access = 0;
+	tdb->flags = tdb_flags;
+	tdb->log_fn = NULL;
+	tdb->transaction = NULL;
+	tdb->access = NULL;
+	tdb->last_error = TDB_SUCCESS;
+	tdb->file = NULL;
+	tdb->lock_fn = tdb_fcntl_lock;
+	tdb->unlock_fn = tdb_fcntl_unlock;
+	tdb->hash_fn = jenkins_hash;
+	memset(&tdb->stats, 0, sizeof(tdb->stats));
+	tdb->stats.base.attr = TDB_ATTRIBUTE_STATS;
+	tdb->stats.size = sizeof(tdb->stats);
+	tdb_io_init(tdb);
+
+	while (attr) {
+		switch (attr->base.attr) {
+		case TDB_ATTRIBUTE_HASH:
+			tdb->hash_fn = attr->hash.fn;
+			tdb->hash_data = attr->hash.data;
+			break;
+		case TDB_ATTRIBUTE_SEED:
+			seed = &attr->seed;
+			break;
+		case TDB_ATTRIBUTE_OPENHOOK:
+			openhook = &attr->openhook;
+			break;
+		default:
+			/* These are set as normal. */
+			ecode = tdb_set_attribute(tdb, attr);
+			if (ecode != TDB_SUCCESS)
+				goto fail;
+		}
+		attr = attr->base.next;
+	}
+
+	if (tdb_flags & ~(TDB_INTERNAL | TDB_NOLOCK | TDB_NOMMAP | TDB_CONVERT
+			  | TDB_NOSYNC | TDB_SEQNUM | TDB_ALLOW_NESTING)) {
+		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;
+		openlock = F_RDLCK;
+	} else {
+		tdb->read_only = false;
+		tdb->mmap_flags = PROT_READ | PROT_WRITE;
+		openlock = F_WRLCK;
+	}
+
+	/* internal databases don't need any of the rest. */
+	if (tdb->flags & TDB_INTERNAL) {
+		tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
+		ecode = tdb_new_file(tdb);
+		if (ecode != TDB_SUCCESS) {
+			goto fail;
+		}
+		tdb->file->fd = -1;
+		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 (stat(name, &st) != -1)
+		tdb->file = find_file(st.st_dev, st.st_ino);
+
+	if (!tdb->file) {
+		int fd;
+
+		if ((fd = open(name, open_flags, mode)) == -1) {
+			/* errno set by open(2) */
+			saved_errno = errno;
+			tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: could not open file %s: %s",
+				   name, strerror(errno));
+			goto fail_errno;
+		}
+
+		/* on exec, don't inherit the fd */
+		v = fcntl(fd, F_GETFD, 0);
+		fcntl(fd, F_SETFD, v | FD_CLOEXEC);
+
+		if (fstat(fd, &st) == -1) {
+			saved_errno = errno;
+			tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+				   "tdb_open: could not stat open %s: %s",
+				   name, strerror(errno));
+			close(fd);
+			goto fail_errno;
+		}
+
+		ecode = tdb_new_file(tdb);
+		if (ecode != TDB_SUCCESS) {
+			close(fd);
+			goto fail;
+		}
+
+		tdb->file->next = files;
+		tdb->file->fd = fd;
+		tdb->file->device = st.st_dev;
+		tdb->file->inode = st.st_ino;
+		tdb->file->map_ptr = NULL;
+		tdb->file->map_size = sizeof(struct tdb_header);
+	}
+
+	/* ensure there is only one process initialising at once */
+	ecode = tdb_lock_open(tdb, openlock, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
+	if (ecode != TDB_SUCCESS) {
+		saved_errno = errno;
+		goto fail_errno;
+	}
+
+	/* call their open hook if they gave us one. */
+	if (openhook) {
+		ecode = openhook->fn(tdb->file->fd, openhook->data);
+		if (ecode != TDB_SUCCESS) {
+			tdb_logerr(tdb, ecode, TDB_LOG_ERROR,
+				   "tdb_open: open hook failed");
+			goto fail;
+		}
+		open_flags |= O_CREAT;
+	}
+
+	/* If they used O_TRUNC, read will return 0. */
+	rlen = pread(tdb->file->fd, &hdr, sizeof(hdr), 0);
+	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;
+	}
+
+	/* 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_unlock_open(tdb, openlock);
+
+	/* This make sure we have current map_size and mmap. */
+	tdb->methods->oob(tdb, tdb->file->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;
+	}
+
+	/* Add to linked list if we're new. */
+	if (tdb->file->refcnt == 1)
+		files = tdb->file;
+	return tdb;
+
+ fail:
+	/* Map ecode to some logical 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;
+	}
+
+fail_errno:
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
+	if (tdb->file) {
+		tdb_lock_cleanup(tdb);
+		if (--tdb->file->refcnt == 0) {
+			assert(tdb->file->num_lockrecs == 0);
+			if (tdb->file->map_ptr) {
+				if (tdb->flags & TDB_INTERNAL) {
+					free(tdb->file->map_ptr);
+				} else
+					tdb_munmap(tdb->file);
+			}
+			if (close(tdb->file->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->file->lockrecs);
+			free(tdb->file);
+		}
+	}
+
+	free(tdb);
+	errno = saved_errno;
+	return NULL;
+}
+
+int tdb_close(struct tdb_context *tdb)
+{
+	int ret = 0;
+
+	tdb_trace(tdb, "tdb_close");
+
+	if (tdb->transaction) {
+		tdb_transaction_cancel(tdb);
+	}
+
+	if (tdb->file->map_ptr) {
+		if (tdb->flags & TDB_INTERNAL)
+			free(tdb->file->map_ptr);
+		else
+			tdb_munmap(tdb->file);
+	}
+	if (tdb->file) {
+		struct tdb_file **i;
+
+		tdb_lock_cleanup(tdb);
+		if (--tdb->file->refcnt == 0) {
+			ret = close(tdb->file->fd);
+
+			/* Remove from files list */
+			for (i = &files; *i; i = &(*i)->next) {
+				if (*i == tdb->file) {
+					*i = tdb->file->next;
+					break;
+				}
+			}
+			free(tdb->file->lockrecs);
+			free(tdb->file);
+		}
+	}
+
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
+	free(tdb);
+
+	return ret;
+}
-- 
cgit