Re: [RFC PATCH v8 17/19] vsock_test: add SOCK_SEQPACKET tests

[Arseny Krasnov <arseny.krasnov@kaspersky.com>]

On 21.04.2021 12:35, Stefano Garzarella wrote:
> On Tue, Apr 13, 2021 at 03:46:58PM +0300, Arseny Krasnov wrote:
>> This adds test of SOCK_SEQPACKET socket: it transfer data and
>> then tests MSG_TRUNC flag. Cases for connect(), bind(), etc. are
>> not tested, because it is same as for stream socket.
>>
>> Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
>> ---
>> v7 -> v8:
>> - Test for MSG_EOR flags now removed.
> Why did we remove it?
Because MSG_EOR flag support was removed.
>
> Thanks,
> Stefano
>
>> tools/testing/vsock/util.c       | 32 +++++++++++++---
>> tools/testing/vsock/util.h       |  3 ++
>> tools/testing/vsock/vsock_test.c | 63 ++++++++++++++++++++++++++++++++
>> 3 files changed, 93 insertions(+), 5 deletions(-)
>>
>> diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c
>> index 93cbd6f603f9..2acbb7703c6a 100644
>> --- a/tools/testing/vsock/util.c
>> +++ b/tools/testing/vsock/util.c
>> @@ -84,7 +84,7 @@ void vsock_wait_remote_close(int fd)
>> }
>>
>> /* Connect to <cid, port> and return the file descriptor. */
>> -int vsock_stream_connect(unsigned int cid, unsigned int port)
>> +static int vsock_connect(unsigned int cid, unsigned int port, int type)
>> {
>> 	union {
>> 		struct sockaddr sa;
>> @@ -101,7 +101,7 @@ int vsock_stream_connect(unsigned int cid, unsigned int port)
>>
>> 	control_expectln("LISTENING");
>>
>> -	fd = socket(AF_VSOCK, SOCK_STREAM, 0);
>> +	fd = socket(AF_VSOCK, type, 0);
>>
>> 	timeout_begin(TIMEOUT);
>> 	do {
>> @@ -120,11 +120,21 @@ int vsock_stream_connect(unsigned int cid, unsigned int port)
>> 	return fd;
>> }
>>
>> +int vsock_stream_connect(unsigned int cid, unsigned int port)
>> +{
>> +	return vsock_connect(cid, port, SOCK_STREAM);
>> +}
>> +
>> +int vsock_seqpacket_connect(unsigned int cid, unsigned int port)
>> +{
>> +	return vsock_connect(cid, port, SOCK_SEQPACKET);
>> +}
>> +
>> /* Listen on <cid, port> and return the first incoming connection.  The remote
>>  * address is stored to clientaddrp.  clientaddrp may be NULL.
>>  */
>> -int vsock_stream_accept(unsigned int cid, unsigned int port,
>> -			struct sockaddr_vm *clientaddrp)
>> +static int vsock_accept(unsigned int cid, unsigned int port,
>> +			struct sockaddr_vm *clientaddrp, int type)
>> {
>> 	union {
>> 		struct sockaddr sa;
>> @@ -145,7 +155,7 @@ int vsock_stream_accept(unsigned int cid, unsigned int port,
>> 	int client_fd;
>> 	int old_errno;
>>
>> -	fd = socket(AF_VSOCK, SOCK_STREAM, 0);
>> +	fd = socket(AF_VSOCK, type, 0);
>>
>> 	if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
>> 		perror("bind");
>> @@ -189,6 +199,18 @@ int vsock_stream_accept(unsigned int cid, unsigned int port,
>> 	return client_fd;
>> }
>>
>> +int vsock_stream_accept(unsigned int cid, unsigned int port,
>> +			struct sockaddr_vm *clientaddrp)
>> +{
>> +	return vsock_accept(cid, port, clientaddrp, SOCK_STREAM);
>> +}
>> +
>> +int vsock_seqpacket_accept(unsigned int cid, unsigned int port,
>> +			   struct sockaddr_vm *clientaddrp)
>> +{
>> +	return vsock_accept(cid, port, clientaddrp, SOCK_SEQPACKET);
>> +}
>> +
>> /* Transmit one byte and check the return value.
>>  *
>>  * expected_ret:
>> diff --git a/tools/testing/vsock/util.h b/tools/testing/vsock/util.h
>> index e53dd09d26d9..a3375ad2fb7f 100644
>> --- a/tools/testing/vsock/util.h
>> +++ b/tools/testing/vsock/util.h
>> @@ -36,8 +36,11 @@ struct test_case {
>> void init_signals(void);
>> unsigned int parse_cid(const char *str);
>> int vsock_stream_connect(unsigned int cid, unsigned int port);
>> +int vsock_seqpacket_connect(unsigned int cid, unsigned int port);
>> int vsock_stream_accept(unsigned int cid, unsigned int port,
>> 			struct sockaddr_vm *clientaddrp);
>> +int vsock_seqpacket_accept(unsigned int cid, unsigned int port,
>> +			   struct sockaddr_vm *clientaddrp);
>> void vsock_wait_remote_close(int fd);
>> void send_byte(int fd, int expected_ret, int flags);
>> void recv_byte(int fd, int expected_ret, int flags);
>> diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
>> index 5a4fb80fa832..ffec985fd36f 100644
>> --- a/tools/testing/vsock/vsock_test.c
>> +++ b/tools/testing/vsock/vsock_test.c
>> @@ -14,6 +14,8 @@
>> #include <errno.h>
>> #include <unistd.h>
>> #include <linux/kernel.h>
>> +#include <sys/types.h>
>> +#include <sys/socket.h>
>>
>> #include "timeout.h"
>> #include "control.h"
>> @@ -279,6 +281,62 @@ static void test_stream_msg_peek_server(const struct test_opts *opts)
>> 	close(fd);
>> }
>>
>> +#define MESSAGE_TRUNC_SZ 32
>> +static void test_seqpacket_msg_trunc_client(const struct test_opts *opts)
>> +{
>> +	int fd;
>> +	char buf[MESSAGE_TRUNC_SZ];
>> +
>> +	fd = vsock_seqpacket_connect(opts->peer_cid, 1234);
>> +	if (fd < 0) {
>> +		perror("connect");
>> +		exit(EXIT_FAILURE);
>> +	}
>> +
>> +	if (send(fd, buf, sizeof(buf), 0) != sizeof(buf)) {
>> +		perror("send failed");
>> +		exit(EXIT_FAILURE);
>> +	}
>> +
>> +	control_writeln("SENDDONE");
>> +	close(fd);
>> +}
>> +
>> +static void test_seqpacket_msg_trunc_server(const struct test_opts *opts)
>> +{
>> +	int fd;
>> +	char buf[MESSAGE_TRUNC_SZ / 2];
>> +	struct msghdr msg = {0};
>> +	struct iovec iov = {0};
>> +
>> +	fd = vsock_seqpacket_accept(VMADDR_CID_ANY, 1234, NULL);
>> +	if (fd < 0) {
>> +		perror("accept");
>> +		exit(EXIT_FAILURE);
>> +	}
>> +
>> +	control_expectln("SENDDONE");
>> +	iov.iov_base = buf;
>> +	iov.iov_len = sizeof(buf);
>> +	msg.msg_iov = &iov;
>> +	msg.msg_iovlen = 1;
>> +
>> +	ssize_t ret = recvmsg(fd, &msg, MSG_TRUNC);
>> +
>> +	if (ret != MESSAGE_TRUNC_SZ) {
>> +		printf("%zi\n", ret);
>> +		perror("MSG_TRUNC doesn't work");
>> +		exit(EXIT_FAILURE);
>> +	}
>> +
>> +	if (!(msg.msg_flags & MSG_TRUNC)) {
>> +		fprintf(stderr, "MSG_TRUNC expected\n");
>> +		exit(EXIT_FAILURE);
>> +	}
>> +
>> +	close(fd);
>> +}
>> +
>> static struct test_case test_cases[] = {
>> 	{
>> 		.name = "SOCK_STREAM connection reset",
>> @@ -309,6 +367,11 @@ static struct test_case test_cases[] = {
>> 		.run_client = test_stream_msg_peek_client,
>> 		.run_server = test_stream_msg_peek_server,
>> 	},
>> +	{
>> +		.name = "SOCK_SEQPACKET send data MSG_TRUNC",
>> +		.run_client = test_seqpacket_msg_trunc_client,
>> +		.run_server = test_seqpacket_msg_trunc_server,
>> +	},
>> 	{},
>> };
>>
>> -- 
>> 2.25.1
>>
>