--- /dev/null
+/*
+ * QEMU I/O channel test helpers
+ *
+ * Copyright (c) 2015 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "io-channel-helpers.h"
+#include "qapi/error.h"
+
+struct QIOChannelTest {
+ QIOChannel *src;
+ QIOChannel *dst;
+ bool blocking;
+ size_t len;
+ size_t niov;
+ char *input;
+ struct iovec *inputv;
+ char *output;
+ struct iovec *outputv;
+ Error *writeerr;
+ Error *readerr;
+};
+
+
+static void test_skip_iovec(struct iovec **iov,
+ size_t *niov,
+ size_t skip,
+ struct iovec *old)
+{
+ size_t offset = 0;
+ size_t i;
+
+ for (i = 0; i < *niov; i++) {
+ if (skip < (*iov)[i].iov_len) {
+ old->iov_len = (*iov)[i].iov_len;
+ old->iov_base = (*iov)[i].iov_base;
+
+ (*iov)[i].iov_len -= skip;
+ (*iov)[i].iov_base += skip;
+ break;
+ } else {
+ skip -= (*iov)[i].iov_len;
+
+ if (i == 0 && old->iov_base) {
+ (*iov)[i].iov_len = old->iov_len;
+ (*iov)[i].iov_base = old->iov_base;
+ old->iov_len = 0;
+ old->iov_base = NULL;
+ }
+
+ offset++;
+ }
+ }
+
+ *iov = *iov + offset;
+ *niov -= offset;
+}
+
+
+/* This thread sends all data using iovecs */
+static gpointer test_io_thread_writer(gpointer opaque)
+{
+ QIOChannelTest *data = opaque;
+ struct iovec *iov = data->inputv;
+ size_t niov = data->niov;
+ struct iovec old = { 0 };
+
+ qio_channel_set_blocking(data->src, data->blocking, NULL);
+
+ while (niov) {
+ ssize_t ret;
+ ret = qio_channel_writev(data->src,
+ iov,
+ niov,
+ &data->writeerr);
+ if (ret == QIO_CHANNEL_ERR_BLOCK) {
+ if (data->blocking) {
+ error_setg(&data->writeerr,
+ "Unexpected I/O blocking");
+ break;
+ } else {
+ qio_channel_wait(data->src,
+ G_IO_OUT);
+ continue;
+ }
+ } else if (ret < 0) {
+ break;
+ } else if (ret == 0) {
+ error_setg(&data->writeerr,
+ "Unexpected zero length write");
+ break;
+ }
+
+ test_skip_iovec(&iov, &niov, ret, &old);
+ }
+
+ return NULL;
+}
+
+
+/* This thread receives all data using iovecs */
+static gpointer test_io_thread_reader(gpointer opaque)
+{
+ QIOChannelTest *data = opaque;
+ struct iovec *iov = data->outputv;
+ size_t niov = data->niov;
+ struct iovec old = { 0 };
+
+ qio_channel_set_blocking(data->dst, data->blocking, NULL);
+
+ while (niov) {
+ ssize_t ret;
+
+ ret = qio_channel_readv(data->dst,
+ iov,
+ niov,
+ &data->readerr);
+
+ if (ret == QIO_CHANNEL_ERR_BLOCK) {
+ if (data->blocking) {
+ error_setg(&data->readerr,
+ "Unexpected I/O blocking");
+ break;
+ } else {
+ qio_channel_wait(data->dst,
+ G_IO_IN);
+ continue;
+ }
+ } else if (ret < 0) {
+ break;
+ } else if (ret == 0) {
+ break;
+ }
+
+ test_skip_iovec(&iov, &niov, ret, &old);
+ }
+
+ return NULL;
+}
+
+
+QIOChannelTest *qio_channel_test_new(void)
+{
+ QIOChannelTest *data = g_new0(QIOChannelTest, 1);
+ size_t i;
+ size_t offset;
+
+
+ /* We'll send 1 MB of data */
+#define CHUNK_COUNT 250
+#define CHUNK_LEN 4194
+
+ data->len = CHUNK_COUNT * CHUNK_LEN;
+ data->input = g_new0(char, data->len);
+ data->output = g_new0(gchar, data->len);
+
+ /* Fill input with a pattern */
+ for (i = 0; i < data->len; i += CHUNK_LEN) {
+ memset(data->input + i, (i / CHUNK_LEN), CHUNK_LEN);
+ }
+
+ /* We'll split the data across a bunch of IO vecs */
+ data->niov = CHUNK_COUNT;
+ data->inputv = g_new0(struct iovec, data->niov);
+ data->outputv = g_new0(struct iovec, data->niov);
+
+ for (i = 0, offset = 0; i < data->niov; i++, offset += CHUNK_LEN) {
+ data->inputv[i].iov_base = data->input + offset;
+ data->outputv[i].iov_base = data->output + offset;
+ data->inputv[i].iov_len = CHUNK_LEN;
+ data->outputv[i].iov_len = CHUNK_LEN;
+ }
+
+ return data;
+}
+
+void qio_channel_test_run_threads(QIOChannelTest *test,
+ bool blocking,
+ QIOChannel *src,
+ QIOChannel *dst)
+{
+ GThread *reader, *writer;
+
+ test->src = src;
+ test->dst = dst;
+ test->blocking = blocking;
+
+ reader = g_thread_new("reader",
+ test_io_thread_reader,
+ test);
+ writer = g_thread_new("writer",
+ test_io_thread_writer,
+ test);
+
+ g_thread_join(reader);
+ g_thread_join(writer);
+
+ test->dst = test->src = NULL;
+}
+
+
+void qio_channel_test_run_writer(QIOChannelTest *test,
+ QIOChannel *src)
+{
+ test->src = src;
+ test_io_thread_writer(test);
+ test->src = NULL;
+}
+
+
+void qio_channel_test_run_reader(QIOChannelTest *test,
+ QIOChannel *dst)
+{
+ test->dst = dst;
+ test_io_thread_reader(test);
+ test->dst = NULL;
+}
+
+
+void qio_channel_test_validate(QIOChannelTest *test)
+{
+ g_assert(test->readerr == NULL);
+ g_assert(test->writeerr == NULL);
+ g_assert_cmpint(memcmp(test->input,
+ test->output,
+ test->len), ==, 0);
+
+ g_free(test->inputv);
+ g_free(test->outputv);
+ g_free(test->input);
+ g_free(test->output);
+ g_free(test);
+}
Code Review / kvmfornfv.git / blobdiff