tests/test-write-threshold.c

   1 /*
   2  * Test block device write threshold
   3  *
   4  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
   5  * See the COPYING.LIB file in the top-level directory.
   6  *
   7  */
   8
   9 #include "qemu/osdep.h"
  10 #include "block/block_int.h"
  11 #include "block/write-threshold.h"
  12
  13
  14 static void test_threshold_not_set_on_init(void)
  15 {
  16     uint64_t res;
  17     BlockDriverState bs;
  18     memset(&bs, 0, sizeof(bs));
  19
  20     g_assert(!bdrv_write_threshold_is_set(&bs));
  21
  22     res = bdrv_write_threshold_get(&bs);
  23     g_assert_cmpint(res, ==, 0);
  24 }
  25
  26 static void test_threshold_set_get(void)
  27 {
  28     uint64_t threshold = 4 * 1024 * 1024;
  29     uint64_t res;
  30     BlockDriverState bs;
  31     memset(&bs, 0, sizeof(bs));
  32
  33     bdrv_write_threshold_set(&bs, threshold);
  34
  35     g_assert(bdrv_write_threshold_is_set(&bs));
  36
  37     res = bdrv_write_threshold_get(&bs);
  38     g_assert_cmpint(res, ==, threshold);
  39 }
  40
  41 static void test_threshold_multi_set_get(void)
  42 {
  43     uint64_t threshold1 = 4 * 1024 * 1024;
  44     uint64_t threshold2 = 15 * 1024 * 1024;
  45     uint64_t res;
  46     BlockDriverState bs;
  47     memset(&bs, 0, sizeof(bs));
  48
  49     bdrv_write_threshold_set(&bs, threshold1);
  50     bdrv_write_threshold_set(&bs, threshold2);
  51     res = bdrv_write_threshold_get(&bs);
  52     g_assert_cmpint(res, ==, threshold2);
  53 }
  54
  55 static void test_threshold_not_trigger(void)
  56 {
  57     uint64_t amount = 0;
  58     uint64_t threshold = 4 * 1024 * 1024;
  59     BlockDriverState bs;
  60     BdrvTrackedRequest req;
  61
  62     memset(&bs, 0, sizeof(bs));
  63     memset(&req, 0, sizeof(req));
  64     req.offset = 1024;
  65     req.bytes = 1024;
  66
  67     bdrv_write_threshold_set(&bs, threshold);
  68     amount = bdrv_write_threshold_exceeded(&bs, &req);
  69     g_assert_cmpuint(amount, ==, 0);
  70 }
  71
  72
  73 static void test_threshold_trigger(void)
  74 {
  75     uint64_t amount = 0;
  76     uint64_t threshold = 4 * 1024 * 1024;
  77     BlockDriverState bs;
  78     BdrvTrackedRequest req;
  79
  80     memset(&bs, 0, sizeof(bs));
  81     memset(&req, 0, sizeof(req));
  82     req.offset = (4 * 1024 * 1024) - 1024;
  83     req.bytes = 2 * 1024;
  84
  85     bdrv_write_threshold_set(&bs, threshold);
  86     amount = bdrv_write_threshold_exceeded(&bs, &req);
  87     g_assert_cmpuint(amount, >=, 1024);
  88 }
  89
  90 typedef struct TestStruct {
  91     const char *name;
  92     void (*func)(void);
  93 } TestStruct;
  94
  95
  96 int main(int argc, char **argv)
  97 {
  98     size_t i;
  99     TestStruct tests[] = {
 100         { "/write-threshold/not-set-on-init",
 101           test_threshold_not_set_on_init },
 102         { "/write-threshold/set-get",
 103           test_threshold_set_get },
 104         { "/write-threshold/multi-set-get",
 105           test_threshold_multi_set_get },
 106         { "/write-threshold/not-trigger",
 107           test_threshold_not_trigger },
 108         { "/write-threshold/trigger",
 109           test_threshold_trigger },
 110         { NULL, NULL }
 111     };
 112
 113     g_test_init(&argc, &argv, NULL);
 114     for (i = 0; tests[i].name != NULL; i++) {
 115         g_test_add_func(tests[i].name, tests[i].func);
 116     }
 117     return g_test_run();
 118 }