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authorRyujiro Shibuya <ryujiro.shibuya@owmobility.com>2020-03-17 02:04:28 +0000
committerFlorin Coras <florin.coras@gmail.com>2020-03-17 17:06:56 +0000
commit64e96613d27816ed7d24b9ca2ed760d855d76c81 (patch)
tree2e0b9af252546e5e781a3480edc930d700b03d27 /src
parent3ec09e9243dceb78e7548725281b0da8eddf72b1 (diff)
svm: fifo test
Type: feature Adding a very simple test case just to confirm that setting fifo size same as the current in-use size would result no space to enqueue, which is zero-window in the TCP. Signed-off-by: Ryujiro Shibuya <ryujiro.shibuya@owmobility.com> Change-Id: I6d60449386eaa270f801d2046cc7e546f843bf34
Diffstat (limited to 'src')
-rw-r--r--src/plugins/unittest/svm_fifo_test.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/plugins/unittest/svm_fifo_test.c b/src/plugins/unittest/svm_fifo_test.c
index ba3cf4f0707..242709cc608 100644
--- a/src/plugins/unittest/svm_fifo_test.c
+++ b/src/plugins/unittest/svm_fifo_test.c
@@ -2009,6 +2009,67 @@ sfifo_test_fifo_replay (vlib_main_t * vm, unformat_input_t * input)
return 0;
}
+static int
+sfifo_test_fifo_make_rcv_wnd_zero (vlib_main_t * vm, unformat_input_t * input)
+{
+ int __clib_unused verbose = 0, fifo_size = 4096, deq_chunk;
+ fifo_segment_main_t _fsm = { 0 }, *fsm = &_fsm;
+ u8 *test_data = 0, *data_buf = 0;
+ fifo_segment_t *fs;
+ svm_fifo_t *f;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "verbose"))
+ verbose = 1;
+ else
+ {
+ vlib_cli_output (vm, "parse error: '%U'", format_unformat_error,
+ input);
+ return -1;
+ }
+ }
+
+ /*
+ * Init fifo and enqueue data such that multiple 4096 chunks are allocated
+ */
+ fs = fifo_segment_prepare (fsm, "fifo-rcv-wnd-zero", 0);
+ f = fifo_prepare (fs, fifo_size);
+
+ /* Enqueue 3000 into 4KB chunk, so there'll be 1096 free space */
+ svm_fifo_set_size (f, 4096);
+ validate_test_and_buf_vecs (&test_data, &data_buf, fifo_size);
+ rv = svm_fifo_enqueue (f, 3000, test_data);
+ SFIFO_TEST (rv == 3000, "enqueued %u", rv);
+ rv = svm_fifo_max_enqueue (f);
+ SFIFO_TEST (rv == 1096, "svm_fifo_max_enqueue %u", rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ /* Shrink fifo size to the in-use size */
+ svm_fifo_set_size (f, 3000);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ /* In TCP, this should result in rcv-wnd = 0 */
+ rv = svm_fifo_max_enqueue (f);
+ SFIFO_TEST (rv == 0, "svm_fifo_max_enqueue %u", rv);
+ rv = svm_fifo_max_enqueue_prod (f);
+ SFIFO_TEST (rv == 0, "svm_fifo_max_enqueue_prod %u", rv);
+
+ /* Dequeue and ... */
+ rv = svm_fifo_dequeue (f, 3000, data_buf);
+ SFIFO_TEST (rv == 3000, "dequeued %u", rv);
+
+ /* Clean up */
+ ft_fifo_free (fs, f);
+ ft_fifo_segment_free (fsm, fs);
+ vec_free (test_data);
+ vec_free (data_buf);
+
+ return 0;
+}
+
+
static fifo_segment_main_t segment_main;
static int
@@ -2660,6 +2721,8 @@ svm_fifo_test (vlib_main_t * vm, unformat_input_t * input,
res = sfifo_test_fifo_shrink (vm, input);
else if (unformat (input, "indirect"))
res = sfifo_test_fifo_indirect (vm, input);
+ else if (unformat (input, "zero"))
+ res = sfifo_test_fifo_make_rcv_wnd_zero (vm, input);
else if (unformat (input, "segment"))
res = sfifo_test_fifo_segment (vm, input);
else if (unformat (input, "all"))
@@ -2724,6 +2787,9 @@ svm_fifo_test (vlib_main_t * vm, unformat_input_t * input,
if ((res = sfifo_test_fifo_indirect (vm, input)))
goto done;
+ if ((res = sfifo_test_fifo_make_rcv_wnd_zero (vm, input)))
+ goto done;
+
str = "all";
unformat_init_cstring (input, str);
if ((res = sfifo_test_fifo_segment (vm, input)))