X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb%2Fopen.c;h=677b23d84de3baf0a8f8b812cdc74db40578cf68;hp=b19e4cea293df769a588db89c71df25529d677ec;hb=e23f74c7fbf6a3db16b7f1b0c3e1122a65d7b258;hpb=7104b7bc2e7f9829891477dbb04a9df926a656a7

diff --git a/ccan/tdb/open.c b/ccan/tdb/open.c
index b19e4cea..677b23d8 100644
--- a/ccan/tdb/open.c
+++ b/ccan/tdb/open.c
@@ -55,8 +55,10 @@ static int tdb_new_database(struct tdb_context *tdb, int hash_size)
 
 	/* We make it up in memory, then write it out if not internal */
 	size = sizeof(struct tdb_header) + (hash_size+1)*sizeof(tdb_off_t);
-	if (!(newdb = (struct tdb_header *)calloc(size, 1)))
-		return TDB_ERRCODE(TDB_ERR_OOM, -1);
+	if (!(newdb = (struct tdb_header *)calloc(size, 1))) {
+		tdb->ecode = TDB_ERR_OOM;
+		return -1;
+	}
 
 	/* Fill in the header */
 	newdb->version = TDB_VERSION;
@@ -159,6 +161,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 		errno = ENOMEM;
 		goto fail;
 	}
+
 	tdb_io_init(tdb);
 	tdb->fd = -1;
 	tdb->name = NULL;
@@ -205,6 +208,10 @@ 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;
 	}
 
@@ -240,17 +247,19 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 
 	errno = 0;
 	if (read(tdb->fd, &tdb->header, sizeof(tdb->header)) != sizeof(tdb->header)
-	    || strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0
-	    || (tdb->header.version != TDB_VERSION
-		&& !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION))))) {
-		/* its not a valid database - possibly initialise it */
+	    || strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0) {
 		if (!(open_flags & O_CREAT) || tdb_new_database(tdb, hash_size) == -1) {
 			if (errno == 0) {
-			errno = EIO; /* ie bad format or something */
+				errno = EIO; /* ie bad format or something */
 			}
 			goto fail;
 		}
 		rev = (tdb->flags & TDB_CONVERT);
+	} else if (tdb->header.version != TDB_VERSION
+		   && !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION)))) {
+		/* wrong version */
+		errno = EIO;
+		goto fail;
 	}
 	vp = (unsigned char *)&tdb->header.version;
 	vertest = (((uint32_t)vp[0]) << 24) | (((uint32_t)vp[1]) << 16) |
@@ -313,6 +322,21 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 		goto fail;
 	}
 
+#ifdef TDB_TRACE
+	{
+		char tracefile[strlen(name) + 32];
+
+		sprintf(tracefile, "%s.trace.%u", name, getpid());
+		tdb->tracefd = open(tracefile, O_WRONLY|O_CREAT|O_EXCL, 0600);
+		if (tdb->tracefd >= 0) {
+			tdb_enable_seqnum(tdb);
+			tdb_trace_open(tdb, "tdb_open", hash_size, tdb_flags,
+				       open_flags);
+		} else
+			TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to open trace file %s!\n", tracefile));
+	}
+#endif
+
  internal:
 	/* Internal (memory-only) databases skip all the code above to
 	 * do with disk files, and resume here by releasing their
@@ -328,7 +352,10 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 
 	if (!tdb)
 		return NULL;
-	
+
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
 	if (tdb->map_ptr) {
 		if (tdb->flags & TDB_INTERNAL)
 			SAFE_FREE(tdb->map_ptr);
@@ -364,8 +391,9 @@ 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);
+		tdb_transaction_cancel_internal(tdb);
 	}
 
 	if (tdb->map_ptr) {
@@ -387,6 +415,9 @@ int tdb_close(struct tdb_context *tdb)
 		}
 	}
 
+#ifdef TDB_TRACE
+	close(tdb->tracefd);
+#endif
 	memset(tdb, 0, sizeof(*tdb));
 	SAFE_FREE(tdb);