Re: [LTP] [PATCH V2] Add userns01 testcase to verify user namespace.

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> From: "Yuan Sun" <sunyuan3@huawei.com>
> To: jstancek@redhat.com
> Cc: ltp-list@lists.sourceforge.net
> Sent: Thursday, 21 May, 2015 12:31:58 PM
> Subject: [PATCH V2] Add userns01 testcase to verify user namespace.
> 
> Signed-off-by: Yuan Sun <sunyuan3@huawei.com>
> ---
>  testcases/kernel/containers/userns01/Makefile      | 26 +++++++
>  testcases/kernel/containers/userns01/userns01.c    | 90
>  ++++++++++++++++++++++
>  .../kernel/containers/userns01/userns_helper.h     | 37 +++++++++
>  3 files changed, 153 insertions(+)
>  create mode 100644 testcases/kernel/containers/userns01/Makefile
>  create mode 100644 testcases/kernel/containers/userns01/userns01.c
>  create mode 100644 testcases/kernel/containers/userns01/userns_helper.h

I added it to .gitignore and container runtest file, slightly fixed
commit message, made GPL license look the same in both files and pushed.

Thank you,
Jan

> 
> diff --git a/testcases/kernel/containers/userns01/Makefile
> b/testcases/kernel/containers/userns01/Makefile
> new file mode 100644
> index 0000000..9f67216
> --- /dev/null
> +++ b/testcases/kernel/containers/userns01/Makefile
> @@ -0,0 +1,26 @@
> +###############################################################################
> +#
> ##
> +# Copyright (c) Huawei Technologies Co., Ltd., 2015
> ##
> +#
> ##
> +# This program is free software;  you can redistribute it and#or modify
> ##
> +# it under the terms of the GNU General Public License as published by
> ##
> +# the Free Software Foundation; either version 2 of the License, or
> ##
> +# (at your option) any later version.
> ##
> +#
> ##
> +# This program is distributed in the hope that it will be useful, but
> ##
> +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
> ##
> +# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> ##
> +# for more details.
> ##
> +#
> ##
> +# You should have received a copy of the GNU General Public License
> ##
> +# along with this program.
> ##
> +###############################################################################
> +
> +top_srcdir		?= ../../../..
> +
> +include $(top_srcdir)/include/mk/testcases.mk
> +include $(abs_srcdir)/../Makefile.inc
> +
> +LDLIBS			:= -lclone -lltp
> +
> +include $(top_srcdir)/include/mk/generic_leaf_target.mk
> diff --git a/testcases/kernel/containers/userns01/userns01.c
> b/testcases/kernel/containers/userns01/userns01.c
> new file mode 100644
> index 0000000..c6022b5
> --- /dev/null
> +++ b/testcases/kernel/containers/userns01/userns01.c
> @@ -0,0 +1,90 @@
> +/*
> +* Copyright (c) Huawei Technologies Co., Ltd., 2015
> +* This program is free software; you can redistribute it and/or modify it
> +* under the terms of the GNU General Public License as published by the Free
> +* Software Foundation; either version 2 of the License, or (at your option)
> +* any later version. This program is distributed in the hope that it will be
> +* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
> +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
> +* Public License for more details. You should have received a copy of the
> GNU
> +* General Public License along with this program.
> +*
> +*
> +* Verify that:
> +*  If a user ID has no mapping inside the namespace, user ID and group
> +* ID will be the value defined in the file /proc/sys/kernel/overflowuid,
> 65534.
> +*/
> +
> +#define _GNU_SOURCE
> +#include <sys/wait.h>
> +#include <assert.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +#include <string.h>
> +#include <errno.h>
> +#include "test.h"
> +#include "libclone.h"
> +#include "userns_helper.h"
> +#define OVERFLOWUIDPATH "/proc/sys/kernel/overflowuid"
> +
> +char *TCID = "user_namespace1";
> +int TST_TOTAL = 1;
> +
> +char fullpath[BUFSIZ];
> +long overflowuid;
> +
> +/*
> + * child_fn1() - Inside a new user namespace
> + */
> +static int child_fn1(void *arg)
> +{
> +	int exit_val;
> +	int uid, gid;
> +
> +	uid = geteuid();
> +	gid = getegid();
> +
> +	tst_resm(TINFO, "USERNS test is running in a new user namespace.");
> +	if (uid == overflowuid && gid == overflowuid) {
> +		printf("Got expected uid and gid\n");
> +		exit_val = 0;
> +	} else {
> +		printf("Got unexpected result of uid=%d gid=%d\n", uid, gid);
> +		exit_val = 1;
> +	}
> +
> +	return exit_val;
> +}
> +
> +static void setup(void)
> +{
> +	check_newuser();
> +	SAFE_FILE_SCANF(NULL, OVERFLOWUIDPATH, "%ld", &overflowuid);
> +}
> +
> +int main(int argc, char *argv[])
> +{
> +	int status;
> +
> +	tst_parse_opts(argc, argv, NULL, NULL);
> +	setup();
> +
> +	TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWUSER, child_fn1, NULL));
> +
> +	if (TEST_RETURN == -1)
> +		tst_brkm(TFAIL | TTERRNO, NULL, "clone failed");
> +	else if ((wait(&status)) == -1)
> +		tst_brkm(TWARN | TERRNO, NULL, "wait failed");
> +
> +	if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
> +		tst_resm(TFAIL, "child exited abnormally");
> +	else if (WIFSIGNALED(status)) {
> +		tst_resm(TFAIL, "child was killed with signal = %d",
> +			 WTERMSIG(status));
> +	}
> +
> +	tst_resm(TPASS, "the uid and the gid are right inside the container");
> +	tst_exit();
> +}
> +
> diff --git a/testcases/kernel/containers/userns01/userns_helper.h
> b/testcases/kernel/containers/userns01/userns_helper.h
> new file mode 100644
> index 0000000..3fb7288
> --- /dev/null
> +++ b/testcases/kernel/containers/userns01/userns_helper.h
> @@ -0,0 +1,37 @@
> +/*
> +* Copyright (c) Huawei Technologies Co., Ltd., 2015
> +* This program is free software; you can redistribute it and/or modify
> +* it under the terms of the GNU General Public License as published by
> +* the Free Software Foundation; either version 2 of the License, or
> +* (at your option) any later version.
> +*
> +* This program is distributed in the hope that it will be useful,
> +* but WITHOUT ANY WARRANTY; without even the implied warranty of
> +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
> +* the GNU General Public License for more details.
> +*/
> +
> +#include "../libclone/libclone.h"
> +#include "test.h"
> +#include "safe_macros.h"
> +
> +static int dummy_child(void *v)
> +{
> +	(void) v;
> +	return 0;
> +}
> +
> +static int check_newuser(void)
> +{
> +	int pid, status;
> +
> +	if (tst_kvercmp(3, 8, 0) < 0)
> +		tst_brkm(TCONF, NULL, "CLONE_NEWUSER not supported");
> +
> +	pid = do_clone_unshare_test(T_CLONE, CLONE_NEWUSER, dummy_child, NULL);
> +	if (pid == -1)
> +		tst_brkm(TCONF | TERRNO, NULL, "CLONE_NEWUSER not supported");
> +	SAFE_WAIT(NULL, &status);
> +
> +	return 0;
> +}
> --
> 1.9.1
> 
> 

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