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

[Avinesh Kumar]

Hi Yang Xu,

Overall test looks fine. But I think we should enable this for all filesystems.

On Thursday, April 25, 2024 7:25:36 AM GMT+2 Yang Xu via ltp wrote:
> Add negative tests for lseek(), when errno is ENXIO
> 
> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
> ---
>  runtest/syscalls                           |  1 +
>  testcases/kernel/syscalls/lseek/.gitignore |  1 +
>  testcases/kernel/syscalls/lseek/lseek12.c  | 80 ++++++++++++++++++++++
>  3 files changed, 82 insertions(+)
>  create mode 100644 testcases/kernel/syscalls/lseek/lseek12.c
> 
> diff --git a/runtest/syscalls b/runtest/syscalls
> index 62eb4c1cd..7575b27b1 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -726,6 +726,7 @@ lseek01 lseek01
>  lseek02 lseek02
>  lseek07 lseek07
>  lseek11 lseek11
> +lseek12 lseek12
>  
>  lstat01A symlink01 -T lstat01
>  lstat01A_64 symlink01 -T lstat01_64
> diff --git a/testcases/kernel/syscalls/lseek/.gitignore b/testcases/kernel/syscalls/lseek/.gitignore
> index 1dc1465ee..c49728607 100644
> --- a/testcases/kernel/syscalls/lseek/.gitignore
> +++ b/testcases/kernel/syscalls/lseek/.gitignore
> @@ -2,3 +2,4 @@
>  /lseek02
>  /lseek07
>  /lseek11
> +/lseek12
> diff --git a/testcases/kernel/syscalls/lseek/lseek12.c b/testcases/kernel/syscalls/lseek/lseek12.c
> new file mode 100644
> index 000000000..9d80e632b
> --- /dev/null
> +++ b/testcases/kernel/syscalls/lseek/lseek12.c
> @@ -0,0 +1,80 @@
> +// 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 lseek(2) fails with
> + *
> + * - ENXIO when whence is SEEK_DATA, file offset is beyond the end of the file
> + * - ENXIO when whence is SEEK_HOLE, file offset is beyond the end of the file
> + */
> +
> +#define _GNU_SOURCE
> +
> +#include <sys/types.h>
> +#include "tst_test.h"
> +#include "lapi/seek.h"
> +
> +#define TEST_ENXIO "test_enxio"
> +
> +static int fd_enxio;
> +
> +static struct test_case_t {
> +	int *fd;
> +	off_t offset;
> +	int whence;
> +	int expected_errno;
> +	char *desc;
> +} tcases[] = {
> +	{&fd_enxio, 10, SEEK_DATA, ENXIO,
> +		"whence is SEEK_DATA, "
> +		"file offset is beyond the end of the file"},
> +	{&fd_enxio, 10, SEEK_HOLE, ENXIO,
> +		"whence is SEEK_HOLE, "
> +		"file offset is beyond the end of the file"},
> +};
> +
> +static void setup(void)
> +{
> +	SAFE_TOUCH(TEST_ENXIO, 0777, NULL);
> +	fd_enxio = SAFE_OPEN(TEST_ENXIO, O_RDWR, 0777);
> +}
> +
> +static void cleanup(void)
> +{
> +	SAFE_CLOSE(fd_enxio);
> +}
> +
> +static void verify_lseek(unsigned int i)
> +{
> +	struct test_case_t *tc = &tcases[i];
> +	off_t offset;
> +
> +	offset = lseek(*(tc->fd), tc->offset, tc->whence);
> +	if (offset == -1) {
> +		if (errno == EINVAL) {
> +			tst_res(TCONF, "SEEK_DATA/SEEK_HOLE are not supported");
> +		} else {
> +			if (errno == tc->expected_errno) {
> +				tst_res(TPASS | TERRNO, tc->desc);
> +			} else {
> +				tst_res(TFAIL | TERRNO,
> +					"lseek() failed unexpectedly");
> +			}
> +		}
> +	} else {
> +		tst_res(TFAIL, "lseek() succeeded unexpectedly");
> +	}

> +}
> +
> +static struct tst_test test = {
> +	.setup = setup,
> +	.cleanup = cleanup,
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = verify_lseek,
> +	.needs_tmpdir = 1,
> +};
> 

Regards,
Avinesh