summaryrefslogtreecommitdiffstats
path: root/testsuites/libtests/block08/bdbuf_test2_1.c
blob: 60056570244eb87cdb8bf713a2febe9883935047 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
/*! @file
 * @brief Check how rtems_bdbuf_read() and rtems_bdbuf_release_modified()
 * coexist. rtems_bdbuf_read() is blocked when required buffer is being
 * transferred.
 *
 * Test sequence:
 * -# Call rtems_bdbuf_read() function in thread #1 and block on
 *    waiting for read complete notification.
 * -# Call rtems_bdbuf_read() function in thread #2 for the same block
 *    number. As the result it blocks on this read as well
 *    (but it will block on transfer semaphore).
 * -# Disk device reports success in read complete notification.
 *    As the result rtems_bdbuf_read() function retuens RTEMS_SUCCESSFUL
 *    in thread #1.
 * -# Thread #1 releases buffer with rtems_bdbuf_release_modified() function.
 * -# rtems_bdbuf_read() function in thread #2 unlocks and returns
 *    RTEMS_SUCCESSFUL.
 * -# Wait swapout period and check that the buffer is not requested to
 *    be flushed to a disk.
 * -# Call rtems_bdbuf_release() function in thread #2.
 * -# Check that this block number is requested for a flush in swapout period.
 *
 * Copyright (C) 2010 OKTET Labs, St.-Petersburg, Russia
 * Author: Oleg Kravtsov <Oleg.Kravtsov@oktetlabs.ru>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.com/license/LICENSE.
 *
 * $Id$
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <bdbuf_tests.h>

static rtems_task bdbuf_test2_1_thread1(rtems_task_argument arg);
static rtems_task bdbuf_test2_1_thread2(rtems_task_argument arg);

/* Block number used in the test */
#define TEST_BLK_NUM 60

void
bdbuf_test2_1_main()
{
    bdbuf_test_msg msg;

    TEST_START("Test 2.1");

    /*
     * Create two working threads that will call rtems_bdbuf_read() function.
     */
    START_THREAD(1, bdbuf_test2_1_thread1);
    START_THREAD(2, bdbuf_test2_1_thread2);

    /*
     * Step 1:
     * Thread #1 calls rtems_bdbuf_read() and we block
     * this thread on data transfer operation.
     */
    WAIT_DRV_MSG(&msg);

    /*
     * Step 2:
     * Thread #2 calls rtems_bdbuf_read() for the same 
     * block number, as the result it shall block waiting
     * on buffer state change (waiting on TRANSFER state).
     */
    CONTINUE_THREAD(2);

    /* Make sure thread #2 managed to block on the buffer. */
    CHECK_THREAD_BLOCKED(2);

    /*
     * Step 3:
     * Unblock thread #1 by reporting successful data transfer result.
     */
    SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);

    /*
     * Wait for sync from thread #1.
     */
    WAIT_THREAD_SYNC(1);
    TEST_CHECK_RESULT("3");

    /* Check thread #2 is still blocked */
    CHECK_THREAD_BLOCKED(2);

    /*
     * Step 4:
     * Thread #1 releases buffer with bdbuf_release_modified() call.
     */
    CONTINUE_THREAD(1);

    /*
     * Step 5:
     * On buffer release operation, we should have unblock
     * of thread #2 that is waiting on read buffer operation.
     */
    WAIT_THREAD_SYNC(2);
    TEST_CHECK_RESULT("5");

   /*
    * Step 6:
    * Wait swapout period and check that there is no
    * request to flush buffer onto a disk.
    */
    CHECK_NO_DRV_MSG();

    /*
     * Step 7:
     * Thread #2 releases buffer with bdbuf_release() call.
     */
    CONTINUE_THREAD(2);

    /*
     * Step 8:
     * Check that in swapout interval disk device
     * driver is requested to flush buffer.
     */
    WAIT_DRV_MSG_WR(&msg);
    SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);

    TEST_END();
}

static rtems_task
bdbuf_test2_1_thread1(rtems_task_argument arg)
{
    rtems_status_code   rc;
    rtems_bdbuf_buffer *bd = NULL;

    /*
     * Step 1 - 3:
     * Try to read blk #N on thread #1
     * We will block on this read and meanwhile
     * thread #2 will try to read the same block.
     * After blocking on read in thread #2, device
     * driver will notify successful completion of 
     * date transfer, and as the result this call 
     * will return valid buffer.
     */
    rc = rtems_bdbuf_read(test_dev, TEST_BLK_NUM, &bd);
    if (rc != RTEMS_SUCCESSFUL)
    {
        TEST_FAILED();
    }
    CONTINUE_MAIN(1);

    /*
     * Step 4:
     * Release buffer returned on the previous step.
     */
    rc = rtems_bdbuf_release_modified(bd);
    if (rc != RTEMS_SUCCESSFUL)
    {
        TEST_FAILED();
    }
    THREAD_END();
}

static rtems_task
bdbuf_test2_1_thread2(rtems_task_argument arg)
{
    rtems_status_code   rc;
    rtems_bdbuf_buffer *bd = NULL;

    WAIT_MAIN_SYNC(2);

    /*
     * Step 2:
     * Try to read block #N. Right now thread #1 is waiting
     * on data transfer operation, so we will block here as well.
     *
     * Step 5:
     * On step 4 thread #1 releases buffer and as the result 
     * our read operation should finish with success. 
     */
    rc = rtems_bdbuf_read(test_dev, TEST_BLK_NUM, &bd);
    if (rc != RTEMS_SUCCESSFUL)
    {
        TEST_FAILED();
    }
    CONTINUE_MAIN(2);

    /*
     * Step 7:
     * Release buffer.
     */
    rc = rtems_bdbuf_release(bd);
    if (rc != RTEMS_SUCCESSFUL)
    {
        TEST_FAILED();
    }
    THREAD_END();
}