Add a set of tests for DRM locking, exposing issues on BSD.
Eric Anholt
parent
8a1ca401b4
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9254e00e4b
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@ -57,6 +57,7 @@ tests/drmstat
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tests/getclient
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tests/getclient
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tests/getstats
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tests/getstats
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tests/getversion
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tests/getversion
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tests/lock
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tests/openclose
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tests/openclose
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tests/setversion
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tests/setversion
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tests/updatedraw
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tests/updatedraw
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@ -20,6 +20,7 @@ TESTS = auth \
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getversion \
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getversion \
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getclient \
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getclient \
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getstats \
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getstats \
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lock \
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setversion \
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setversion \
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updatedraw
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updatedraw
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@ -0,0 +1,262 @@
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/*
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* Copyright © 2007 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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/** @file lock.c
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* Tests various potential failures of the DRM locking mechanisms
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*/
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#include <limits.h>
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#include "drmtest.h"
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enum auth_event {
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SERVER_READY,
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CLIENT_MAGIC,
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SERVER_LOCKED,
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CLIENT_LOCKED,
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};
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int commfd[2];
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unsigned int lock1 = 0x00001111;
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unsigned int lock2 = 0x00002222;
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/* return time in milliseconds */
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static unsigned int
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get_millis()
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000 + tv.tv_usec / 1000;
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}
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static void
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wait_event(int pipe, enum auth_event expected_event)
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{
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int ret;
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enum auth_event event;
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unsigned char in;
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ret = read(commfd[pipe], &in, 1);
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if (ret == -1)
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err(1, "read error");
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event = in;
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if (event != expected_event)
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errx(1, "unexpected event: %d\n", event);
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}
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static void
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send_event(int pipe, enum auth_event send_event)
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{
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int ret;
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unsigned char event;
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event = send_event;
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ret = write(commfd[pipe], &event, 1);
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if (ret == -1)
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err(1, "failed to send event %d", event);
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}
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static void
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client_auth(int drmfd)
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{
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struct drm_auth auth;
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int ret;
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wait_event(0, SERVER_READY);
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/* Get a client magic number and pass it to the master for auth. */
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ret = ioctl(drmfd, DRM_IOCTL_GET_MAGIC, &auth);
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if (ret == -1)
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err(1, "Couldn't get client magic");
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send_event(0, CLIENT_MAGIC);
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ret = write(commfd[0], &auth.magic, sizeof(auth.magic));
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if (ret == -1)
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err(1, "Couldn't write auth data");
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}
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static void
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server_auth(int drmfd)
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{
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struct drm_auth auth;
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int ret;
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send_event(1, SERVER_READY);
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wait_event(1, CLIENT_MAGIC);
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ret = read(commfd[1], &auth.magic, sizeof(auth.magic));
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if (ret == -1)
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err(1, "Failure to read client magic");
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ret = ioctl(drmfd, DRM_IOCTL_AUTH_MAGIC, &auth);
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if (ret == -1)
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err(1, "Failure to authenticate client magic\n");
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}
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/** Tests that locking is successful in normal conditions */
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static void
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test_lock_unlock(int drmfd)
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{
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int ret;
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ret = drmGetLock(drmfd, lock1, 0);
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if (ret != 0)
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err(1, "Locking failed");
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ret = drmUnlock(drmfd, lock1);
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if (ret != 0)
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err(1, "Unlocking failed");
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}
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/** Tests that unlocking the lock while it's not held works correctly */
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static void
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test_unlock_unlocked(int drmfd)
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{
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int ret;
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ret = drmUnlock(drmfd, lock1);
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if (ret == 0)
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err(1, "Unlocking unlocked lock succeeded");
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}
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/** Tests that unlocking a lock held by another context fails appropriately */
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static void
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test_unlock_unowned(int drmfd)
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{
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int ret;
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ret = drmGetLock(drmfd, lock1, 0);
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assert(ret == 0);
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ret = drmUnlock(drmfd, lock2);
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if (ret == 0)
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errx(1, "Unlocking other context's lock succeeded");
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ret = drmUnlock(drmfd, lock1);
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assert(ret == 0);
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}
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/**
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* Tests that an open/close by the same process doesn't result in the lock
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* being dropped.
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*/
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static void test_open_close_locked(drmfd)
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{
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int ret, tempfd;
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ret = drmGetLock(drmfd, lock1, 0);
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assert(ret == 0);
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/* XXX: Need to make sure that this is the same device as drmfd */
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tempfd = drm_open_any();
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close(tempfd);
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ret = drmUnlock(drmfd, lock1);
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if (ret != 0)
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errx(1, "lock lost during open/close by same pid");
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close(drmfd);
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}
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static void client()
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{
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int drmfd, ret;
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unsigned int time;
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/* XXX: Should make sure we open the same DRM as the master */
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drmfd = drm_open_any();
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client_auth(drmfd);
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/* Wait for the server to grab the lock, then grab it ourselves (to
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* contest it). Hopefully we hit it within the window of when the
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* server locks.
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*/
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wait_event(0, SERVER_LOCKED);
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ret = drmGetLock(drmfd, lock2, 0);
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time = get_millis();
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if (ret != 0)
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err(1, "Failed to get lock on client\n");
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drmUnlock(drmfd, lock2);
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/* Tell the server that our locking completed, and when it did */
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send_event(0, CLIENT_LOCKED);
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ret = write(commfd[0], &time, sizeof(time));
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exit(0);
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}
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static void server()
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{
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int drmfd, tempfd, ret;
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unsigned int client_time, unlock_time;
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drmfd = drm_open_any_master();
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test_lock_unlock(drmfd);
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test_unlock_unlocked(drmfd);
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test_unlock_unowned(drmfd);
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test_open_close_locked(drmfd);
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/* Perform the authentication sequence with the client. */
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server_auth(drmfd);
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/* Now, test that the client attempting to lock while the server
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* holds the lock works correctly.
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*/
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ret = drmGetLock(drmfd, lock1, 0);
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assert(ret == 0);
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send_event(1, SERVER_LOCKED);
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/* Wait a while for the client to do its thing */
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sleep(1);
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ret = drmUnlock(drmfd, lock1);
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assert(ret == 0);
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unlock_time = get_millis();
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wait_event(1, CLIENT_LOCKED);
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ret = read(commfd[1], &client_time, sizeof(client_time));
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if (ret == -1)
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err(1, "Failure to read client magic");
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if (client_time < unlock_time)
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errx(1, "Client took lock before server released it");
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}
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int main(int argc, char **argv)
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{
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int ret;
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ret = pipe(commfd);
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if (ret == -1)
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err(1, "Couldn't create pipe");
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ret = fork();
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if (ret == -1)
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err(1, "failure to fork client");
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if (ret == 0)
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client();
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else
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server();
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return 0;
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}
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