X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb%2Fopen.c;h=ed32cf327f0dd8a21fe86a39ae380c5d5f0a6c99;hp=8b9776864a6729a5a85bcfe470c73c709db45364;hb=c92d0d635e1dcbb1d7b6f3356d4ac01e6f1d2535;hpb=b2c0ebc6f53b05b222937991f100f8a89701f9b1

diff --git a/ccan/tdb/open.c b/ccan/tdb/open.c
index 8b977686..ed32cf32 100644
--- a/ccan/tdb/open.c
+++ b/ccan/tdb/open.c
@@ -164,6 +164,9 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 
 	tdb_io_init(tdb);
 	tdb->fd = -1;
+#ifdef TDB_TRACE
+	tdb->tracefd = -1;
+#endif
 	tdb->name = NULL;
 	tdb->map_ptr = NULL;
 	tdb->flags = tdb_flags;
@@ -200,6 +203,22 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 		tdb->flags &= ~TDB_CLEAR_IF_FIRST;
 	}
 
+	if ((tdb->flags & TDB_ALLOW_NESTING) &&
+	    (tdb->flags & TDB_DISALLOW_NESTING)) {
+		tdb->ecode = TDB_ERR_NESTING;
+		TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_open_ex: "
+			"allow_nesting and disallow_nesting are not allowed together!"));
+		errno = EINVAL;
+		goto fail;
+	}
+
+	/*
+	 * TDB_DISALLOW_NESTING is the default behavior.
+	 */
+	if (!(tdb->flags & TDB_ALLOW_NESTING)) {
+		tdb->flags |= TDB_DISALLOW_NESTING;
+	}
+
 	/* internal databases don't mmap or lock, and start off cleared */
 	if (tdb->flags & TDB_INTERNAL) {
 		tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
@@ -208,10 +227,6 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 			TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: tdb_new_database failed!"));
 			goto fail;
 		}
-#ifdef TDB_TRACE
-		/* All tracing will fail.  That's ok. */
-		tdb->tracefd = -1;
-#endif
 		goto internal;
 	}
 
@@ -403,8 +418,10 @@ int tdb_close(struct tdb_context *tdb)
 			tdb_munmap(tdb);
 	}
 	SAFE_FREE(tdb->name);
-	if (tdb->fd != -1)
+	if (tdb->fd != -1) {
 		ret = close(tdb->fd);
+		tdb->fd = -1;
+	}
 	SAFE_FREE(tdb->lockrecs);
 
 	/* Remove from contexts list */