Unverified Commit 4810ce7c authored by Christian Brauner's avatar Christian Brauner
Browse files

selftests: add F_DUPDFD_QUERY selftests 



Add simple selftests for the new F_DUPFD_QUERY fcntl().

Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent c62b758b

tools/testing/selftests/core/close_range_test.c

+54 −1
Original line number Diff line number Diff line
@@ -17,6 +17,15 @@ 
#include "../kselftest_harness.h"

#include "../clone3/clone3_selftests.h"





#ifndef F_LINUX_SPECIFIC_BASE

#define F_LINUX_SPECIFIC_BASE 1024

#endif



#ifndef F_DUPFD_QUERY

#define F_DUPFD_QUERY (F_LINUX_SPECIFIC_BASE + 3)

#endif



static inline int sys_close_range(unsigned int fd, unsigned int max_fd,

				  unsigned int flags)

{
@@ -45,6 +54,15 @@ TEST(core_close_range) 
			SKIP(return, "close_range() syscall not supported");

	}



	for (i = 0; i < 100; i++) {

		ret = fcntl(open_fds[i], F_DUPFD_QUERY, open_fds[i + 1]);

		if (ret < 0) {

			EXPECT_EQ(errno, EINVAL);

		} else {

			EXPECT_EQ(ret, 0);

		}

	}



	EXPECT_EQ(0, sys_close_range(open_fds[0], open_fds[50], 0));



	for (i = 0; i <= 50; i++)
@@ -358,7 +376,7 @@ TEST(close_range_cloexec_unshare) 
 */

TEST(close_range_cloexec_syzbot)

{

	int fd1, fd2, fd3, flags, ret, status;

	int fd1, fd2, fd3, fd4, flags, ret, status;

	pid_t pid;

	struct __clone_args args = {

		.flags = CLONE_FILES,
@@ -372,6 +390,13 @@ TEST(close_range_cloexec_syzbot) 
	fd2 = dup2(fd1, 1000);

	EXPECT_GT(fd2, 0);



	flags = fcntl(fd1, F_DUPFD_QUERY, fd2);

	if (flags < 0) {

		EXPECT_EQ(errno, EINVAL);

	} else {

		EXPECT_EQ(flags, 1);

	}



	pid = sys_clone3(&args, sizeof(args));

	ASSERT_GE(pid, 0);
@@ -396,6 +421,15 @@ TEST(close_range_cloexec_syzbot) 
		fd3 = dup2(fd1, 42);

		EXPECT_GT(fd3, 0);



		flags = fcntl(fd1, F_DUPFD_QUERY, fd3);

		if (flags < 0) {

			EXPECT_EQ(errno, EINVAL);

		} else {

			EXPECT_EQ(flags, 1);

		}







		/*

			 * Duplicating the file descriptor must remove the

			 * FD_CLOEXEC flag.
@@ -426,6 +460,24 @@ TEST(close_range_cloexec_syzbot) 
	fd3 = dup2(fd1, 42);

	EXPECT_GT(fd3, 0);



	flags = fcntl(fd1, F_DUPFD_QUERY, fd3);

	if (flags < 0) {

		EXPECT_EQ(errno, EINVAL);

	} else {

		EXPECT_EQ(flags, 1);

	}



	fd4 = open("/dev/null", O_RDWR);

	EXPECT_GT(fd4, 0);



	/* Same inode, different file pointers. */

	flags = fcntl(fd1, F_DUPFD_QUERY, fd4);

	if (flags < 0) {

		EXPECT_EQ(errno, EINVAL);

	} else {

		EXPECT_EQ(flags, 0);

	}



	flags = fcntl(fd3, F_GETFD);

	EXPECT_GT(flags, -1);

	EXPECT_EQ(flags & FD_CLOEXEC, 0);
@@ -433,6 +485,7 @@ TEST(close_range_cloexec_syzbot) 
	EXPECT_EQ(close(fd1), 0);

	EXPECT_EQ(close(fd2), 0);

	EXPECT_EQ(close(fd3), 0);

	EXPECT_EQ(close(fd4), 0);

}



/*