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Commit e6373ce7 authored by John Fastabend's avatar John Fastabend Committed by Daniel Borkmann
Browse files

bpf: sockmap add SK_DROP tests 



Add tests for SK_DROP.

Signed-off-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 468b3fde

samples/sockmap/sockmap_kern.c

+15 −0
Original line number Diff line number Diff line
@@ -236,4 +236,19 @@ int bpf_prog9(struct sk_msg_md *msg) 
	return SK_PASS;

}



SEC("sk_msg7")

int bpf_prog10(struct sk_msg_md *msg)

{

	int *bytes, zero = 0;



	bytes = bpf_map_lookup_elem(&sock_apply_bytes, &zero);

	if (bytes)

		bpf_msg_apply_bytes(msg, *bytes);

	bytes = bpf_map_lookup_elem(&sock_cork_bytes, &zero);

	if (bytes)

		bpf_msg_cork_bytes(msg, *bytes);

	return SK_DROP;

}





char _license[] SEC("license") = "GPL";

samples/sockmap/sockmap_user.c

+46 −16
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ int txmsg_pass; 
int txmsg_noisy;

int txmsg_redir;

int txmsg_redir_noisy;

int txmsg_drop;

int txmsg_apply;

int txmsg_cork;
@@ -75,6 +76,7 @@ static const struct option long_options[] = { 
	{"txmsg_noisy",		no_argument,	&txmsg_noisy, 1  },

	{"txmsg_redir",		no_argument,	&txmsg_redir, 1  },

	{"txmsg_redir_noisy",	no_argument,	&txmsg_redir_noisy, 1},

	{"txmsg_drop",		no_argument,	&txmsg_drop, 1 },

	{"txmsg_apply",	required_argument,	NULL, 'a'},

	{"txmsg_cork",	required_argument,	NULL, 'k'},

	{0, 0, NULL, 0 }
@@ -210,9 +212,19 @@ struct msg_stats { 
	struct timespec end;

};



struct sockmap_options {

	int verbose;

	bool base;

	bool sendpage;

	bool data_test;

	bool drop_expected;

};



static int msg_loop_sendpage(int fd, int iov_length, int cnt,

			     struct msg_stats *s)

			     struct msg_stats *s,

			     struct sockmap_options *opt)

{

	bool drop = opt->drop_expected;

	unsigned char k = 0;

	FILE *file;

	int i, fp;
@@ -229,11 +241,17 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, 
	for (i = 0; i < cnt; i++) {

		int sent = sendfile(fd, fp, NULL, iov_length);



		if (sent < 0) {

		if (!drop && sent < 0) {

			perror("send loop error:");

			close(fp);

			return sent;

		} else if (drop && sent >= 0) {

			printf("sendpage loop error expected: %i\n", sent);

			close(fp);

			return -EIO;

		}



		if (sent > 0)

			s->bytes_sent += sent;

	}

	clock_gettime(CLOCK_MONOTONIC, &s->end);
@@ -242,12 +260,15 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt, 
}



static int msg_loop(int fd, int iov_count, int iov_length, int cnt,

		    struct msg_stats *s, bool tx, bool data_test)

		    struct msg_stats *s, bool tx,

		    struct sockmap_options *opt)

{

	struct msghdr msg = {0};

	int err, i, flags = MSG_NOSIGNAL;

	struct iovec *iov;

	unsigned char k;

	bool data_test = opt->data_test;

	bool drop = opt->drop_expected;



	iov = calloc(iov_count, sizeof(struct iovec));

	if (!iov)
@@ -281,10 +302,15 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, 
		for (i = 0; i < cnt; i++) {

			int sent = sendmsg(fd, &msg, flags);



			if (sent < 0) {

			if (!drop && sent < 0) {

				perror("send loop error:");

				goto out_errno;

			} else if (drop && sent >= 0) {

				printf("send loop error expected: %i\n", sent);

				errno = -EIO;

				goto out_errno;

			}

			if (sent > 0)

				s->bytes_sent += sent;

		}

		clock_gettime(CLOCK_MONOTONIC, &s->end);
@@ -375,13 +401,6 @@ static inline float recvdBps(struct msg_stats s) 
	return s.bytes_recvd / (s.end.tv_sec - s.start.tv_sec);

}



struct sockmap_options {

	int verbose;

	bool base;

	bool sendpage;

	bool data_test;

};



static int sendmsg_test(int iov_count, int iov_buf, int cnt,

			struct sockmap_options *opt)

{
@@ -399,10 +418,13 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt, 


	rxpid = fork();

	if (rxpid == 0) {

		if (opt->drop_expected)

			exit(1);



		if (opt->sendpage)

			iov_count = 1;

		err = msg_loop(rx_fd, iov_count, iov_buf,

			       cnt, &s, false, opt->data_test);

			       cnt, &s, false, opt);

		if (err)

			fprintf(stderr,

				"msg_loop_rx: iov_count %i iov_buf %i cnt %i err %i\n",
@@ -426,10 +448,10 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt, 
	txpid = fork();

	if (txpid == 0) {

		if (opt->sendpage)

			err = msg_loop_sendpage(c1, iov_buf, cnt, &s);

			err = msg_loop_sendpage(c1, iov_buf, cnt, &s, opt);

		else

			err = msg_loop(c1, iov_count, iov_buf,

				       cnt, &s, true, opt->data_test);

				       cnt, &s, true, opt);



		if (err)

			fprintf(stderr,
@@ -674,6 +696,9 @@ int main(int argc, char **argv) 
		tx_prog_fd = prog_fd[5];

	else if (txmsg_redir_noisy)

		tx_prog_fd = prog_fd[6];

	else if (txmsg_drop)

		tx_prog_fd = prog_fd[9];

	/* apply and cork must be last */

	else if (txmsg_apply)

		tx_prog_fd = prog_fd[7];

	else if (txmsg_cork)
@@ -700,6 +725,7 @@ int main(int argc, char **argv) 
				err, strerror(errno));

			return err;

		}



		if (txmsg_redir || txmsg_redir_noisy)

			redir_fd = c2;

		else
@@ -736,6 +762,10 @@ int main(int argc, char **argv) 
		}



	}



	if (txmsg_drop)

		options.drop_expected = true;



	if (test == PING_PONG)

		err = forever_ping_pong(rate, &options);

	else if (test == SENDMSG) {