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Commit 3f12817f authored by Willem de Bruijn's avatar Willem de Bruijn Committed by David S. Miller
Browse files

selftests: udp gso with corking 



Corked sockets take a different path to construct a udp datagram than
the lockless fast path. Test this alternate path.

Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e5b2d91c

tools/testing/selftests/net/udpgso.c

+32 −10
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ static bool cfg_do_ipv4; 
static bool		cfg_do_ipv6;

static bool		cfg_do_connected;

static bool		cfg_do_connectionless;

static bool		cfg_do_msgmore;

static bool		cfg_do_setsockopt;

static int		cfg_specific_test_id = -1;
@@ -369,6 +370,23 @@ static void set_route_mtu(int mtu, bool is_ipv4) 
	fprintf(stderr, "route mtu (test): %u\n", mtu);

}



static bool __send_one(int fd, struct msghdr *msg, int flags)

{

	int ret;



	ret = sendmsg(fd, msg, flags);

	if (ret == -1 && (errno == EMSGSIZE || errno == ENOMEM))

		return false;

	if (ret == -1)

		error(1, errno, "sendmsg");

	if (ret != msg->msg_iov->iov_len)

		error(1, 0, "sendto: %d != %lu", ret, msg->msg_iov->iov_len);

	if (msg->msg_flags)

		error(1, 0, "sendmsg: return flags 0x%x\n", msg->msg_flags);



	return true;

}



static bool send_one(int fd, int len, int gso_len,

		     struct sockaddr *addr, socklen_t alen)

{
@@ -376,7 +394,6 @@ static bool send_one(int fd, int len, int gso_len, 
	struct msghdr msg = {0};

	struct iovec iov = {0};

	struct cmsghdr *cm;

	int ret;



	iov.iov_base = buf;

	iov.iov_len = len;
@@ -398,15 +415,17 @@ static bool send_one(int fd, int len, int gso_len, 
		*((uint16_t *) CMSG_DATA(cm)) = gso_len;

	}



	ret = sendmsg(fd, &msg, 0);

	if (ret == -1 && (errno == EMSGSIZE || errno == ENOMEM))

		return false;

	if (ret == -1)

		error(1, errno, "sendmsg");

	if (ret != len)

		error(1, 0, "sendto: %d != %u", ret, len);

	/* If MSG_MORE, send 1 byte followed by remainder */

	if (cfg_do_msgmore && len > 1) {

		iov.iov_len = 1;

		if (!__send_one(fd, &msg, MSG_MORE))

			error(1, 0, "send 1B failed");



	return true;

		iov.iov_base++;

		iov.iov_len = len - 1;

	}



	return __send_one(fd, &msg, 0);

}



static int recv_one(int fd, int flags)
@@ -558,7 +577,7 @@ static void parse_opts(int argc, char **argv) 
{

	int c;



	while ((c = getopt(argc, argv, "46cCst:")) != -1) {

	while ((c = getopt(argc, argv, "46cCmst:")) != -1) {

		switch (c) {

		case '4':

			cfg_do_ipv4 = true;
@@ -572,6 +591,9 @@ static void parse_opts(int argc, char **argv) 
		case 'C':

			cfg_do_connectionless = true;

			break;

		case 'm':

			cfg_do_msgmore = true;

			break;

		case 's':

			cfg_do_setsockopt = true;

			break;

tools/testing/selftests/net/udpgso.sh

+6 −0
Original line number Diff line number Diff line
@@ -21,3 +21,9 @@ echo "ipv4 connected" 
# blocked on 2nd loopback address

# echo "ipv6 connected"

# ./in_netns.sh ./udpgso -6 -c



echo "ipv4 msg_more"

./in_netns.sh ./udpgso -4 -C -m



echo "ipv6 msg_more"

./in_netns.sh ./udpgso -6 -C -m