SERVER-15953: add wiredtiger to third_party

1 files changed, 58 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/src/session/session_salvage.c b/src/third_party/wiredtiger/src/session/session_salvage.c
new file mode 100644
index 00000000000..1512c6515ec
--- /dev/null
+++ b/src/third_party/wiredtiger/src/session/session_salvage.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+#include "wt_internal.h"
+
+/*
+ * __wt_salvage --
+ *	Salvage a single file.
+ */
+int
+__wt_salvage(WT_SESSION_IMPL *session, const char *cfg[])
+{
+	WT_CKPT *ckptbase;
+	WT_DATA_HANDLE *dhandle;
+	WT_DECL_RET;
+
+	dhandle = session->dhandle;
+
+	/*
+	 * XXX
+	 * The salvage process reads and discards previous checkpoints, so the
+	 * underlying block manager has to ignore any previous checkpoint
+	 * entries when creating a new checkpoint, in other words, we can't use
+	 * the metadata checkpoint list, it has all of those checkpoint listed
+	 * and we don't care about them.  Build a clean checkpoint list and use
+	 * it instead.
+	 *
+	 * Don't first clear the metadata checkpoint list and call the function
+	 * to get a list of checkpoints: a crash between clearing the metadata
+	 * checkpoint list and creating a new checkpoint list would look like a
+	 * create or open of a file without a checkpoint to roll-forward from,
+	 * and the contents of the file would be discarded.
+	 */
+	WT_RET(__wt_calloc_def(session, 2, &ckptbase));
+	WT_ERR(__wt_strdup(session, WT_CHECKPOINT, &ckptbase[0].name));
+	F_SET(&ckptbase[0], WT_CKPT_ADD);
+
+	WT_ERR(__wt_bt_salvage(session, ckptbase, cfg));
+
+	/*
+	 * If no checkpoint was created, well, it's probably bad news, but there
+	 * is nothing to do but clear any recorded checkpoints for the file.  If
+	 * a checkpoint was created, life is good, replace any existing list of
+	 * checkpoints with the single new one.
+	 */
+	if (ckptbase[0].raw.data == NULL)
+		WT_ERR(__wt_meta_checkpoint_clear(session, dhandle->name));
+	else
+		WT_ERR(__wt_meta_ckptlist_set(
+		    session, dhandle->name, ckptbase, NULL));
+
+err:	__wt_meta_ckptlist_free(session, ckptbase);
+	return (ret);
+}