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Message-ID: <0056e870-a1ea-9cfc-d1c8-2ac9381b7af2@salutedevices.com>
Date: Mon, 9 Oct 2023 22:22:11 +0300
From: Arseniy Krasnov <avkrasnov@...utedevices.com>
To: Stefano Garzarella <sgarzare@...hat.com>
CC: Stefan Hajnoczi <stefanha@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Bobby Eshleman <bobby.eshleman@...edance.com>,
<kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<kernel@...rdevices.ru>, <oxffffaa@...il.com>
Subject: Re: [PATCH net-next v3 12/12] test/vsock: io_uring rx/tx tests
On 09.10.2023 18:16, Stefano Garzarella wrote:
> On Sat, Oct 07, 2023 at 08:21:39PM +0300, Arseniy Krasnov wrote:
>> This adds set of tests which use io_uring for rx/tx. This test suite is
>> implemented as separated util like 'vsock_test' and has the same set of
>> input arguments as 'vsock_test'. These tests only cover cases of data
>> transmission (no connect/bind/accept etc).
>>
>> Signed-off-by: Arseniy Krasnov <avkrasnov@...utedevices.com>
>> ---
>> Changelog:
>> v1 -> v2:
>> * Add 'LDLIBS = -luring' to the target 'vsock_uring_test'.
>> * Add 'vsock_uring_test' to the target 'test'.
>> v2 -> v3:
>> * Make 'struct vsock_test_data' private by placing it to the .c file.
>> Rename it and add comments to this struct to clarify sense of its
>> fields.
>> * Add 'vsock_uring_test' to the '.gitignore'.
>> * Add receive loop to the server side - this is needed to read entire
>> data sent by client.
>>
>> tools/testing/vsock/.gitignore | 1 +
>> tools/testing/vsock/Makefile | 7 +-
>> tools/testing/vsock/vsock_uring_test.c | 350 +++++++++++++++++++++++++
>> 3 files changed, 356 insertions(+), 2 deletions(-)
>> create mode 100644 tools/testing/vsock/vsock_uring_test.c
>>
>> diff --git a/tools/testing/vsock/.gitignore b/tools/testing/vsock/.gitignore
>> index a8adcfdc292b..d9f798713cd7 100644
>> --- a/tools/testing/vsock/.gitignore
>> +++ b/tools/testing/vsock/.gitignore
>> @@ -3,3 +3,4 @@
>> vsock_test
>> vsock_diag_test
>> vsock_perf
>> +vsock_uring_test
>> diff --git a/tools/testing/vsock/Makefile b/tools/testing/vsock/Makefile
>> index 1a26f60a596c..b80e7c7def1e 100644
>> --- a/tools/testing/vsock/Makefile
>> +++ b/tools/testing/vsock/Makefile
>> @@ -1,12 +1,15 @@
>> # SPDX-License-Identifier: GPL-2.0-only
>> all: test vsock_perf
>> -test: vsock_test vsock_diag_test
>> +test: vsock_test vsock_diag_test vsock_uring_test
>> vsock_test: vsock_test.o vsock_test_zerocopy.o timeout.o control.o util.o
>> vsock_diag_test: vsock_diag_test.o timeout.o control.o util.o
>> vsock_perf: vsock_perf.o
>>
>> +vsock_uring_test: LDLIBS = -luring
>> +vsock_uring_test: control.o util.o vsock_uring_test.o timeout.o
>> +
>> CFLAGS += -g -O2 -Werror -Wall -I. -I../../include -I../../../usr/include -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE -D_GNU_SOURCE
>> .PHONY: all test clean
>> clean:
>> - ${RM} *.o *.d vsock_test vsock_diag_test vsock_perf
>> + ${RM} *.o *.d vsock_test vsock_diag_test vsock_perf vsock_uring_test
>> -include *.d
>> diff --git a/tools/testing/vsock/vsock_uring_test.c b/tools/testing/vsock/vsock_uring_test.c
>> new file mode 100644
>> index 000000000000..889887cf3989
>> --- /dev/null
>> +++ b/tools/testing/vsock/vsock_uring_test.c
>> @@ -0,0 +1,350 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/* io_uring tests for vsock
>> + *
>> + * Copyright (C) 2023 SberDevices.
>> + *
>> + * Author: Arseniy Krasnov <avkrasnov@...utedevices.com>
>> + */
>> +
>> +#include <getopt.h>
>> +#include <stdio.h>
>> +#include <stdlib.h>
>> +#include <string.h>
>> +#include <liburing.h>
>> +#include <unistd.h>
>> +#include <sys/mman.h>
>> +#include <linux/kernel.h>
>> +#include <error.h>
>> +
>> +#include "util.h"
>> +#include "control.h"
>> +#include "msg_zerocopy_common.h"
>> +
>> +#define PAGE_SIZE 4096
>
> Ditto.
>
>> +#define RING_ENTRIES_NUM 4
>> +
>> +#define VSOCK_TEST_DATA_MAX_IOV 3
>> +
>> +struct vsock_io_uring_test {
>> + /* Number of valid elements in 'vecs'. */
>> + int vecs_cnt;
>> + /* Array how to allocate buffers for test.
>> + * 'iov_base' == NULL -> valid buf: mmap('iov_len').
>> + *
>> + * 'iov_base' == MAP_FAILED -> invalid buf:
>> + * mmap('iov_len'), then munmap('iov_len').
>> + * 'iov_base' still contains result of
>> + * mmap().
>> + *
>> + * 'iov_base' == number -> unaligned valid buf:
>> + * mmap('iov_len') + number.
>> + */
>> + struct iovec vecs[VSOCK_TEST_DATA_MAX_IOV];
>> +};
>> +
>> +static struct vsock_io_uring_test test_data_array[] = {
>> + /* All elements have page aligned base and size. */
>> + {
>> + .vecs_cnt = 3,
>> + {
>> + { NULL, PAGE_SIZE },
>> + { NULL, 2 * PAGE_SIZE },
>> + { NULL, 3 * PAGE_SIZE },
>> + }
>> + },
>> + /* Middle element has both non-page aligned base and size. */
>> + {
>> + .vecs_cnt = 3,
>> + {
>> + { NULL, PAGE_SIZE },
>> + { (void *)1, 200 },
>> + { NULL, 3 * PAGE_SIZE },
>> + }
>> + }
>> +};
>> +
>> +static void vsock_io_uring_client(const struct test_opts *opts,
>> + const struct vsock_io_uring_test *test_data,
>> + bool msg_zerocopy)
>> +{
>> + struct io_uring_sqe *sqe;
>> + struct io_uring_cqe *cqe;
>> + struct io_uring ring;
>> + struct iovec *iovec;
>> + struct msghdr msg;
>> + int fd;
>> +
>> + fd = vsock_stream_connect(opts->peer_cid, 1234);
>> + if (fd < 0) {
>> + perror("connect");
>> + exit(EXIT_FAILURE);
>> + }
>> +
>> + if (msg_zerocopy)
>> + enable_so_zerocopy(fd);
>> +
>> + iovec = iovec_from_test_data(test_data->vecs, test_data->vecs_cnt);
>
> Ah, I see this is used also here, so now I get why in util.h
>
> Okay, it is fine, but please change the name in something like
> `alloc_test_iovec`/`free_test_iovec` and add a bit of documentation
> in util.c about the input and output of that function.
>
> The rest LGMT.
Hello!
Thanks for review, seems comments are clear and easy to fix!
Thanks, Arseniy
>
> Stefano
>
>> +
>> + if (io_uring_queue_init(RING_ENTRIES_NUM, &ring, 0))
>> + error(1, errno, "io_uring_queue_init");
>> +
>> + if (io_uring_register_buffers(&ring, iovec, test_data->vecs_cnt))
>> + error(1, errno, "io_uring_register_buffers");
>> +
>> + memset(&msg, 0, sizeof(msg));
>> + msg.msg_iov = iovec;
>> + msg.msg_iovlen = test_data->vecs_cnt;
>> + sqe = io_uring_get_sqe(&ring);
>> +
>> + if (msg_zerocopy)
>> + io_uring_prep_sendmsg_zc(sqe, fd, &msg, 0);
>> + else
>> + io_uring_prep_sendmsg(sqe, fd, &msg, 0);
>> +
>> + if (io_uring_submit(&ring) != 1)
>> + error(1, errno, "io_uring_submit");
>> +
>> + if (io_uring_wait_cqe(&ring, &cqe))
>> + error(1, errno, "io_uring_wait_cqe");
>> +
>> + io_uring_cqe_seen(&ring, cqe);
>> +
>> + control_writeulong(iovec_hash_djb2(iovec, test_data->vecs_cnt));
>> +
>> + control_writeln("DONE");
>> + io_uring_queue_exit(&ring);
>> + free_iovec_test_data(test_data->vecs, iovec, test_data->vecs_cnt);
>> + close(fd);
>> +}
>> +
>> +static void vsock_io_uring_server(const struct test_opts *opts,
>> + const struct vsock_io_uring_test *test_data)
>> +{
>> + unsigned long remote_hash;
>> + unsigned long local_hash;
>> + struct io_uring ring;
>> + size_t data_len;
>> + size_t recv_len;
>> + void *data;
>> + int fd;
>> +
>> + fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
>> + if (fd < 0) {
>> + perror("accept");
>> + exit(EXIT_FAILURE);
>> + }
>> +
>> + data_len = iovec_bytes(test_data->vecs, test_data->vecs_cnt);
>> +
>> + data = malloc(data_len);
>> + if (!data) {
>> + perror("malloc");
>> + exit(EXIT_FAILURE);
>> + }
>> +
>> + if (io_uring_queue_init(RING_ENTRIES_NUM, &ring, 0))
>> + error(1, errno, "io_uring_queue_init");
>> +
>> + recv_len = 0;
>> +
>> + while (recv_len < data_len) {
>> + struct io_uring_sqe *sqe;
>> + struct io_uring_cqe *cqe;
>> + struct iovec iovec;
>> +
>> + sqe = io_uring_get_sqe(&ring);
>> + iovec.iov_base = data + recv_len;
>> + iovec.iov_len = data_len;
>> +
>> + io_uring_prep_readv(sqe, fd, &iovec, 1, 0);
>> +
>> + if (io_uring_submit(&ring) != 1)
>> + error(1, errno, "io_uring_submit");
>> +
>> + if (io_uring_wait_cqe(&ring, &cqe))
>> + error(1, errno, "io_uring_wait_cqe");
>> +
>> + recv_len += cqe->res;
>> + io_uring_cqe_seen(&ring, cqe);
>> + }
>> +
>> + if (recv_len != data_len) {
>> + fprintf(stderr, "expected %zu, got %zu\n", data_len,
>> + recv_len);
>> + exit(EXIT_FAILURE);
>> + }
>> +
>> + local_hash = hash_djb2(data, data_len);
>> +
>> + remote_hash = control_readulong();
>> + if (remote_hash != local_hash) {
>> + fprintf(stderr, "hash mismatch\n");
>> + exit(EXIT_FAILURE);
>> + }
>> +
>> + control_expectln("DONE");
>> + io_uring_queue_exit(&ring);
>> + free(data);
>> +}
>> +
>> +void test_stream_uring_server(const struct test_opts *opts)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(test_data_array); i++)
>> + vsock_io_uring_server(opts, &test_data_array[i]);
>> +}
>> +
>> +void test_stream_uring_client(const struct test_opts *opts)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(test_data_array); i++)
>> + vsock_io_uring_client(opts, &test_data_array[i], false);
>> +}
>> +
>> +void test_stream_uring_msg_zc_server(const struct test_opts *opts)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(test_data_array); i++)
>> + vsock_io_uring_server(opts, &test_data_array[i]);
>> +}
>> +
>> +void test_stream_uring_msg_zc_client(const struct test_opts *opts)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(test_data_array); i++)
>> + vsock_io_uring_client(opts, &test_data_array[i], true);
>> +}
>> +
>> +static struct test_case test_cases[] = {
>> + {
>> + .name = "SOCK_STREAM io_uring test",
>> + .run_server = test_stream_uring_server,
>> + .run_client = test_stream_uring_client,
>> + },
>> + {
>> + .name = "SOCK_STREAM io_uring MSG_ZEROCOPY test",
>> + .run_server = test_stream_uring_msg_zc_server,
>> + .run_client = test_stream_uring_msg_zc_client,
>> + },
>> + {},
>> +};
>> +
>> +static const char optstring[] = "";
>> +static const struct option longopts[] = {
>> + {
>> + .name = "control-host",
>> + .has_arg = required_argument,
>> + .val = 'H',
>> + },
>> + {
>> + .name = "control-port",
>> + .has_arg = required_argument,
>> + .val = 'P',
>> + },
>> + {
>> + .name = "mode",
>> + .has_arg = required_argument,
>> + .val = 'm',
>> + },
>> + {
>> + .name = "peer-cid",
>> + .has_arg = required_argument,
>> + .val = 'p',
>> + },
>> + {
>> + .name = "help",
>> + .has_arg = no_argument,
>> + .val = '?',
>> + },
>> + {},
>> +};
>> +
>> +static void usage(void)
>> +{
>> + fprintf(stderr, "Usage: vsock_uring_test [--help] [--control-host=<host>] --control-port=<port> --mode=client|server --peer-cid=<cid>\n"
>> + "\n"
>> + " Server: vsock_uring_test --control-port=1234 --mode=server --peer-cid=3\n"
>> + " Client: vsock_uring_test --control-host=192.168.0.1 --control-port=1234 --mode=client --peer-cid=2\n"
>> + "\n"
>> + "Run transmission tests using io_uring. Usage is the same as\n"
>> + "in ./vsock_test\n"
>> + "\n"
>> + "Options:\n"
>> + " --help This help message\n"
>> + " --control-host <host> Server IP address to connect to\n"
>> + " --control-port <port> Server port to listen on/connect to\n"
>> + " --mode client|server Server or client mode\n"
>> + " --peer-cid <cid> CID of the other side\n"
>> + );
>> + exit(EXIT_FAILURE);
>> +}
>> +
>> +int main(int argc, char **argv)
>> +{
>> + const char *control_host = NULL;
>> + const char *control_port = NULL;
>> + struct test_opts opts = {
>> + .mode = TEST_MODE_UNSET,
>> + .peer_cid = VMADDR_CID_ANY,
>> + };
>> +
>> + init_signals();
>> +
>> + for (;;) {
>> + int opt = getopt_long(argc, argv, optstring, longopts, NULL);
>> +
>> + if (opt == -1)
>> + break;
>> +
>> + switch (opt) {
>> + case 'H':
>> + control_host = optarg;
>> + break;
>> + case 'm':
>> + if (strcmp(optarg, "client") == 0) {
>> + opts.mode = TEST_MODE_CLIENT;
>> + } else if (strcmp(optarg, "server") == 0) {
>> + opts.mode = TEST_MODE_SERVER;
>> + } else {
>> + fprintf(stderr, "--mode must be \"client\" or \"server\"\n");
>> + return EXIT_FAILURE;
>> + }
>> + break;
>> + case 'p':
>> + opts.peer_cid = parse_cid(optarg);
>> + break;
>> + case 'P':
>> + control_port = optarg;
>> + break;
>> + case '?':
>> + default:
>> + usage();
>> + }
>> + }
>> +
>> + if (!control_port)
>> + usage();
>> + if (opts.mode == TEST_MODE_UNSET)
>> + usage();
>> + if (opts.peer_cid == VMADDR_CID_ANY)
>> + usage();
>> +
>> + if (!control_host) {
>> + if (opts.mode != TEST_MODE_SERVER)
>> + usage();
>> + control_host = "0.0.0.0";
>> + }
>> +
>> + control_init(control_host, control_port,
>> + opts.mode == TEST_MODE_SERVER);
>> +
>> + run_tests(test_cases, &opts);
>> +
>> + control_cleanup();
>> +
>> + return 0;
>> +}
>> --
>> 2.25.1
>>
>
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