Adding upstream version 1.4.8.upstream/1.4.8upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/test/run-allrecord-traverse-deadlock.c b/test/run-allrecord-traverse-deadlock.c
new file mode 100644
index 0000000..2c58206
--- /dev/null
+++ b/test/run-allrecord-traverse-deadlock.c
@@ -0,0 +1,203 @@
+#include "../common/tdb_private.h"
+#include "../common/io.c"
+#include "../common/tdb.c"
+#include "../common/lock.c"
+#include "../common/freelist.c"
+#include "../common/traverse.c"
+#include "../common/transaction.c"
+#include "../common/error.c"
+#include "../common/open.c"
+#include "../common/check.c"
+#include "../common/hash.c"
+#include "../common/mutex.c"
+#include "tap-interface.h"
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+#include "logging.h"
+
+static void do_allrecord_lock(const char *name, int tdb_flags, int up,
+			      int down)
+{
+	struct tdb_context *tdb;
+	int ret;
+	ssize_t nread, nwritten;
+	char c = 0;
+
+	tdb = tdb_open_ex(name, 3, tdb_flags,
+			  O_RDWR|O_CREAT, 0755, &taplogctx, NULL);
+	ok(tdb, "tdb_open_ex should succeed");
+
+	ret = tdb_lockall(tdb);
+	ok(ret == 0, "tdb_lockall should succeed");
+
+	nwritten = write(up, &c, sizeof(c));
+	ok(nwritten == sizeof(c), "write should succeed");
+
+	nread = read(down, &c, sizeof(c));
+	ok(nread == sizeof(c), "read should succeed");
+
+	ret = tdb_traverse(tdb, NULL, NULL);
+	ok(ret == -1, "do_allrecord_lock: traverse should fail");
+
+	nwritten = write(up, &c, sizeof(c));
+	ok(nwritten == sizeof(c), "write should succeed");
+
+	exit(0);
+}
+
+static void do_traverse(const char *name, int tdb_flags, int up, int down)
+{
+	struct tdb_context *tdb;
+	int ret;
+	ssize_t nread, nwritten;
+	char c = 0;
+
+	tdb = tdb_open_ex(name, 3, tdb_flags,
+			  O_RDWR|O_CREAT, 0755, &taplogctx, NULL);
+	ok(tdb, "tdb_open_ex should succeed");
+
+	ret = tdb_traverse(tdb, NULL, NULL);
+	ok(ret == 1, "do_traverse: tdb_traverse should return 1 record");
+
+	nwritten = write(up, &c, sizeof(c));
+	ok(nwritten == sizeof(c), "write should succeed");
+
+	nread = read(down, &c, sizeof(c));
+	ok(nread == sizeof(c), "read should succeed");
+
+	exit(0);
+}
+
+/*
+ * Process 1: get the allrecord_lock on a tdb.
+ * Process 2: start a traverse, this will stall waiting for the
+ *            first chainlock: That is taken by the allrecord_lock
+ * Process 1: start a traverse: This will get EDEADLK in trying to
+ *            get the TRANSACTION_LOCK. It will deadlock for mutexes,
+ *            which don't have built-in deadlock detection.
+ */
+
+static int do_tests(const char *name, int tdb_flags)
+{
+	struct tdb_context *tdb;
+	int ret;
+	pid_t traverse_child, allrecord_child;
+	int traverse_down[2];
+	int traverse_up[2];
+	int allrecord_down[2];
+	int allrecord_up[2];
+	char c;
+	ssize_t nread, nwritten;
+	TDB_DATA key, data;
+
+	key.dsize = strlen("hi");
+	key.dptr = discard_const_p(uint8_t, "hi");
+	data.dsize = strlen("world");
+	data.dptr = discard_const_p(uint8_t, "world");
+
+	tdb = tdb_open_ex(name, 3, tdb_flags,
+			  O_RDWR|O_CREAT, 0755, &taplogctx, NULL);
+	ok(tdb, "tdb_open_ex should succeed");
+
+	ret = tdb_store(tdb, key, data, TDB_INSERT);
+	ok(ret == 0, "tdb_store should succeed");
+
+	ret = pipe(traverse_down);
+	ok(ret == 0, "pipe should succeed");
+
+	ret = pipe(traverse_up);
+	ok(ret == 0, "pipe should succeed");
+
+	ret = pipe(allrecord_down);
+	ok(ret == 0, "pipe should succeed");
+
+	ret = pipe(allrecord_up);
+	ok(ret == 0, "pipe should succeed");
+
+	allrecord_child = fork();
+	ok(allrecord_child != -1, "fork should succeed");
+
+	if (allrecord_child == 0) {
+		tdb_close(tdb);
+		close(traverse_up[0]);
+		close(traverse_up[1]);
+		close(traverse_down[0]);
+		close(traverse_down[1]);
+		close(allrecord_up[0]);
+		close(allrecord_down[1]);
+		do_allrecord_lock(name, tdb_flags,
+				  allrecord_up[1], allrecord_down[0]);
+		exit(0);
+	}
+	close(allrecord_up[1]);
+	close(allrecord_down[0]);
+
+	nread = read(allrecord_up[0], &c, sizeof(c));
+	ok(nread == sizeof(c), "read should succeed");
+
+	traverse_child = fork();
+	ok(traverse_child != -1, "fork should succeed");
+
+	if (traverse_child == 0) {
+		tdb_close(tdb);
+		close(traverse_up[0]);
+		close(traverse_down[1]);
+		close(allrecord_up[0]);
+		close(allrecord_down[1]);
+		do_traverse(name, tdb_flags,
+			    traverse_up[1], traverse_down[0]);
+		exit(0);
+	}
+	close(traverse_up[1]);
+	close(traverse_down[0]);
+
+	poll(NULL, 0, 1000);
+
+	nwritten = write(allrecord_down[1], &c, sizeof(c));
+	ok(nwritten == sizeof(c), "write should succeed");
+
+	nread = read(traverse_up[0], &c, sizeof(c));
+	ok(nread == sizeof(c), "read should succeed");
+
+	nwritten = write(traverse_down[1], &c, sizeof(c));
+	ok(nwritten == sizeof(c), "write should succeed");
+
+	nread = read(allrecord_up[0], &c, sizeof(c));
+	ok(nread == sizeof(c), "ret should succeed");
+
+	close(traverse_up[0]);
+	close(traverse_down[1]);
+	close(allrecord_up[0]);
+	close(allrecord_down[1]);
+	diag("%s tests done", name);
+	return exit_status();
+}
+
+int main(int argc, char *argv[])
+{
+	int ret;
+	bool mutex_support;
+
+	mutex_support = tdb_runtime_check_for_robust_mutexes();
+
+	ret = do_tests("marklock-deadlock-fcntl.tdb",
+		       TDB_CLEAR_IF_FIRST |
+		       TDB_INCOMPATIBLE_HASH);
+	ok(ret == 0, "marklock-deadlock-fcntl.tdb tests should succeed");
+
+	if (!mutex_support) {
+		skip(1, "No robust mutex support, "
+			"skipping marklock-deadlock-mutex.tdb tests");
+		return exit_status();
+	}
+
+	ret = do_tests("marklock-deadlock-mutex.tdb",
+		       TDB_CLEAR_IF_FIRST |
+		       TDB_MUTEX_LOCKING |
+		       TDB_INCOMPATIBLE_HASH);
+	ok(ret == 0, "marklock-deadlock-mutex.tdb tests should succeed");
+
+	return exit_status();
+}