[LTP] [PATCH v2 2/3] Add minimum kernel requirement for FS setup

[Cyril Hrubis]

Hi!
> In some cases, a filesystem that is going to be created and mounted
> by LTP can't be supported by certain kernel versions. This is the case
> of the CoW support: mkfs creates a CoW filesystem, while underlying
> kernel can't mount it.
> 
> To cover this scenario, a new flag called .min_kver has been
> introduced in the tst_fs structure, giving the user a possibility to
> filter out certain kernels not supporting certain FS features.
> 
> Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
> ---
>  include/tst_test.h            |  5 +++++
>  lib/tst_test.c                | 20 ++++++++++++++------
>  testcases/lib/tst_run_shell.c |  5 +++++
>  3 files changed, 24 insertions(+), 6 deletions(-)
> 
> diff --git a/include/tst_test.h b/include/tst_test.h
> index 38d24f48c..ac3ee66af 100644
> --- a/include/tst_test.h
> +++ b/include/tst_test.h
> @@ -270,6 +270,9 @@ struct tst_ulimit_val {
>   *
>   * @mnt_data: The data passed to mount(2) when the test library mounts a device
>   *            in the case of 'tst_test.mount_device'.
> + *
> + * @min_kver: minimum kernel version supporting the filesystem which has been
                 ^
		 Uppercase here.

> + *		created with mkfs.
       ^
       Should spaces or tabs be used here? The rest of the comments uses
       spaces.

>   */
>  struct tst_fs {
>  	const char *type;
> @@ -280,6 +283,8 @@ struct tst_fs {
>  
>  	unsigned int mnt_flags;
>  	const void *mnt_data;
> +
> +	const char *min_kver;
>  };
>  
>  /**
> diff --git a/lib/tst_test.c b/lib/tst_test.c
> index 7dfab4677..49a46fc7b 100644
> --- a/lib/tst_test.c
> +++ b/lib/tst_test.c
> @@ -946,19 +946,24 @@ static void do_exit(int ret)
>  	exit(ret);
>  }
>  
> -void check_kver(void)
> +void check_kver(const char *min_kver, const int skip)
                                          ^
					  Maybe this should be called
					  brk_on_skip in both of the
					  cases.
>  {
> +	char *msg;
>  	int v1, v2, v3;
>  
> -	if (tst_parse_kver(tst_test->min_kver, &v1, &v2, &v3)) {
> +	if (tst_parse_kver(min_kver, &v1, &v2, &v3)) {
>  		tst_res(TWARN,
>  			"Invalid kernel version %s, expected %%d.%%d.%%d",
> -			tst_test->min_kver);
> +			min_kver);
>  	}
>  
>  	if (tst_kvercmp(v1, v2, v3) < 0) {
> -		tst_brk(TCONF, "The test requires kernel %s or newer",
> -			tst_test->min_kver);
> +		msg = "The test requires kernel %s or newer";
> +
> +		if (skip)
> +			tst_res(TCONF, msg, min_kver);
> +		else
> +			tst_brk(TCONF, msg, min_kver);
>  	}
>  }
>  
> @@ -1150,6 +1155,9 @@ static void prepare_device(struct tst_fs *fs)
>  	char buf[1024];
>  	struct tst_fs dummy = {};
>  
> +	if (fs->min_kver)
> +		check_kver(fs->min_kver, 1);

And here as we, we print the message but continue with the action. I
suppose that we have to hook it up the same way as the mkfs check.

>  	fs = fs ?: &dummy;
>  
>  	const char *const extra[] = {fs->mkfs_size_opt, NULL};
> @@ -1287,7 +1295,7 @@ static void do_setup(int argc, char *argv[])
>  		tst_brk(TCONF, "Test needs to be run as root");
>  
>  	if (tst_test->min_kver)
> -		check_kver();
> +		check_kver(tst_test->min_kver, 0);
>  
>  	if (tst_test->supported_archs && !tst_is_on_arch(tst_test->supported_archs))
>  		tst_brk(TCONF, "This arch '%s' is not supported for test!", tst_arch.name);
> diff --git a/testcases/lib/tst_run_shell.c b/testcases/lib/tst_run_shell.c
> index fbfbe16a7..dc840782a 100644
> --- a/testcases/lib/tst_run_shell.c
> +++ b/testcases/lib/tst_run_shell.c
> @@ -155,6 +155,7 @@ enum fs_ids {
>  	MKFS_SIZE_OPT,
>  	MKFS_VER,
>  	MNT_FLAGS,
> +	FS_MIN_KVER,
>  	TYPE,
>  };
>  
> @@ -163,6 +164,7 @@ static ujson_obj_attr fs_attrs[] = {
>  	UJSON_OBJ_ATTR_IDX(MKFS_VER, "mkfs_ver", UJSON_STR),
>  	UJSON_OBJ_ATTR_IDX(MKFS_SIZE_OPT, "mkfs_size_opt", UJSON_STR),
>  	UJSON_OBJ_ATTR_IDX(MNT_FLAGS, "mnt_flags", UJSON_ARR),
> +	UJSON_OBJ_ATTR_IDX(FS_MIN_KVER, "min_kver", UJSON_STR),

Again has to be sorted.

>  	UJSON_OBJ_ATTR_IDX(TYPE, "type", UJSON_STR),
>  };
>  
> @@ -229,6 +231,9 @@ static struct tst_fs *parse_filesystems(ujson_reader *reader, ujson_val *val)
>  			case MKFS_VER:
>  				ret[i].mkfs_ver = strdup(val->val_str);
>  			break;
> +			case FS_MIN_KVER:
> +				ret[i].min_kver = strdup(val->val_str);
> +			break;
>  			case MNT_FLAGS:
>  				ret[i].mnt_flags = parse_mnt_flags(reader, val);
>  			break;
> 
> -- 
> 2.43.0
> 
> 
> -- 
> Mailing list info: https://lists.linux.it/listinfo/ltp

-- 
Cyril Hrubis
chrubis@suse.cz