Re: [PATCH i-g-t] tests: add core_setmaster_vs_auth

[Thomas Hellstrom <thellstrom@vmware.com>]

Daniel,

LGTM, except one comment below:

On 12/01/2015 08:45 AM, Daniel Vetter wrote:
> Tests that master state isn't leaked to new masters by checking
> that auth magics for the old master don't work any more.
>
> Based upon a simple test program provided by Thomas.
>
> v2: Use correct test stanza ... and I need coffee.
>
> Cc: Thomas Hellstrom <thellstrom@vmware.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  tests/.gitignore               |  1 +
>  tests/Makefile.sources         |  1 +
>  tests/core_setmaster_vs_auth.c | 73 ++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 75 insertions(+)
>  create mode 100644 tests/core_setmaster_vs_auth.c
>
> diff --git a/tests/.gitignore b/tests/.gitignore
> index 85936ea45c9f..43d63d3abac9 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -4,6 +4,7 @@ core_getclient
>  core_getstats
>  core_getversion
>  core_prop_blob
> +core_setmaster_vs_auth
>  drm_auth
>  drm_import_export
>  drm_read
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index ff178f7a2df4..b70bca060253 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -102,6 +102,7 @@ TESTS_progs = \
>  	core_getstats \
>  	core_getversion \
>  	core_prop_blob \
> +	core_setmaster_vs_auth \
>  	drm_auth \
>  	drm_import_export \
>  	drm_read \
> diff --git a/tests/core_setmaster_vs_auth.c b/tests/core_setmaster_vs_auth.c
> new file mode 100644
> index 000000000000..1d66044f7fe1
> --- /dev/null
> +++ b/tests/core_setmaster_vs_auth.c
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright © 2015 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + *
> + * Authors:
> + *    Daniel Vetter <daniel.vetter@ffwll.ch>
> + *
> + * Based upon a test program provided by Thomas Hellstrom <thellstrom@vmware.com>
> + */
> +
> +/*
> + * Testcase: Check that drop/setMaster correctly transfer master state
> + *
> + * Test approach is only checking auth state (which is part of master state) by
> + * trying to authenticate a client against the wrong master.
> + */
> +
> +#define _GNU_SOURCE
> +#include "igt.h"
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <string.h>
> +#ifdef __linux__
> +# include <sys/syscall.h>
> +#else
> +# include <pthread.h>
> +#endif
> +
> +igt_simple_main
> +{
> +	int master1, master2, client;
> +	drm_magic_t magic;
> +
> +	master1 = drm_open_driver(DRIVER_ANY);
> +	do_or_die(drmSetMaster(master1));
> +
> +	/* Get an authentication magic from the first master */
> +	client = drm_open_driver(DRIVER_ANY);
> +	do_or_die(drmGetMagic(client, &magic));
> +
> +	/* Open an fd an make it master */
> +	master2 = drm_open_driver(DRIVER_ANY);
> +	do_or_die(drmDropMaster(master1));
> +	do_or_die(drmSetMaster(master2));
> +
> +	/* auth shouldn't work any more since the master we have the magic from
> +	 * isn't the current master any more. */

Auth shouldn't work since we're authenticating with a different master than
the one we got the magic from.

> +	igt_assert_neq(drmAuthMagic(master2, magic), 0);
> +	igt_assert_eq(errno, EINVAL);
> +
> +	close(client);
> +	close(master2);
> +	close(master1);
> +}

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