[LTP] [PATCH] bind: Add negative tests for bind

[Yang Xu]

Add negative cases for bind(), when errno is EBADF or ENOTDIR

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 runtest/syscalls                          |  1 +
 testcases/kernel/syscalls/bind/.gitignore |  1 +
 testcases/kernel/syscalls/bind/bind07.c   | 81 +++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 testcases/kernel/syscalls/bind/bind07.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 3521047f4..71579cde4 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -37,6 +37,7 @@ bind03 bind03
 bind04 bind04
 bind05 bind05
 bind06 bind06
+bind07 bind07
 
 bpf_map01 bpf_map01
 bpf_prog01 bpf_prog01
diff --git a/testcases/kernel/syscalls/bind/.gitignore b/testcases/kernel/syscalls/bind/.gitignore
index c85774441..8aff2456f 100644
--- a/testcases/kernel/syscalls/bind/.gitignore
+++ b/testcases/kernel/syscalls/bind/.gitignore
@@ -4,3 +4,4 @@
 /bind04
 /bind05
 /bind06
+/bind07
diff --git a/testcases/kernel/syscalls/bind/bind07.c b/testcases/kernel/syscalls/bind/bind07.c
new file mode 100644
index 000000000..dda6e8ad4
--- /dev/null
+++ b/testcases/kernel/syscalls/bind/bind07.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2024 FUJITSU LIMITED. All Rights Reserved.
+ * Author: Yang Xu <xuyang2018.jy@fujitsu.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Verify that bind(2) fails with
+ *
+ * - EBADF when sockfd is not a valid file descriptor
+ * - ENOTDIR when a component of addr prefix is not a directory
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include "tst_test.h"
+#include "libbind.h"
+
+#define TEST_EBADF "test_ebadf"
+#define DIR_ENOTDIR "dir_enotdir"
+#define TEST_ENOTDIR "test_enotdir"
+
+static struct sockaddr_in sock_ebadf;
+static struct sockaddr_un sock_enotdir;
+
+static struct test_case_t {
+	int sockfd;
+	struct sockaddr *addr;
+	socklen_t addrlen;
+	char *sockfile;
+	int type;
+	int protocol;
+	int expected_errno;
+	char *desc;
+} tcases[] = {
+	{-1, (struct sockaddr *)&sock_ebadf, sizeof(sock_ebadf), TEST_EBADF,
+		SOCK_STREAM, IPPROTO_TCP, EBADF,
+		"bind() sockfd is not a valid file descriptor"},
+	{0, (struct sockaddr *)&sock_enotdir, sizeof(sock_enotdir),
+		DIR_ENOTDIR "/" TEST_ENOTDIR, SOCK_STREAM, 0, ENOTDIR,
+		"bind() a component of addr prefix is not a directory"},
+};
+
+static void setup(void)
+{
+	tst_init_sockaddr_inet(&sock_ebadf, IPV4_ADDRESS, 0);
+
+	SAFE_TOUCH(DIR_ENOTDIR, 0777, NULL);
+	sock_enotdir.sun_family = AF_UNIX;
+	strncpy(sock_enotdir.sun_path, DIR_ENOTDIR "/" TEST_ENOTDIR,
+		sizeof(sock_enotdir.sun_path));
+}
+
+static void verify_bind(unsigned int i)
+{
+	struct test_case_t *tc = &tcases[i];
+
+	int sockfd = tc->sockfd;
+
+	if (!sockfd)
+		sockfd = SAFE_SOCKET(tc->addr->sa_family, tc->type,
+			tc->protocol);
+
+	TST_EXP_FAIL(bind(sockfd, tc->addr, tc->addrlen), tc->expected_errno,
+		"%s", tc->desc);
+
+	if (sockfd > 0)
+		SAFE_CLOSE(sockfd);
+	if (!TST_RET)
+		SAFE_UNLINK(tc->sockfile);
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.tcnt = ARRAY_SIZE(tcases),
+	.test = verify_bind,
+	.needs_tmpdir = 1,
+	.needs_root = 1,
+};
-- 
2.39.3