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Commit 23a95442 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

selftests: net: add PF_PACKET TPACKET v1/v2/v3 selftests 



This patch adds a simple test case that probes the packet socket's
TPACKET_V1, TPACKET_V2 and TPACKET_V3 behavior regarding mmap(2)'ed
I/O for a small burst of 100 packets. The test currently runs for ...

  TPACKET_V1: RX_RING, TX_RING
  TPACKET_V2: RX_RING, TX_RING
  TPACKET_V3: RX_RING

... and will output on success:

  test: TPACKET_V1 with PACKET_RX_RING .................... 100 pkts (9600 bytes)
  test: TPACKET_V1 with PACKET_TX_RING .................... 100 pkts (9600 bytes)
  test: TPACKET_V2 with PACKET_RX_RING .................... 100 pkts (9600 bytes)
  test: TPACKET_V2 with PACKET_TX_RING .................... 100 pkts (9600 bytes)
  test: TPACKET_V3 with PACKET_RX_RING .................... 100 pkts (9600 bytes)
  OK. All tests passed

Reusable parts of psock_fanout.c have been put into a psock_lib.h
file for common usage. Test case successfully tested on x86_64.

Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9dcc71e1

tools/testing/selftests/net/Makefile

+2 −2
Original line number Diff line number Diff line 
# Makefile for net selftests



CC = $(CROSS_COMPILE)gcc

CFLAGS = -Wall

CFLAGS = -Wall -O2 -g



CFLAGS += -I../../../../usr/include/



NET_PROGS = socket psock_fanout

NET_PROGS = socket psock_fanout psock_tpacket



all: $(NET_PROGS)

%: %.c

tools/testing/selftests/net/psock_fanout.c

+3 −85
Original line number Diff line number Diff line
@@ -61,91 +61,9 @@ 
#include <sys/types.h>

#include <unistd.h>



#define DATA_LEN			100

#define DATA_CHAR			'a'

#define RING_NUM_FRAMES			20

#define PORT_BASE			8000



static void pair_udp_open(int fds[], uint16_t port)

{

	struct sockaddr_in saddr, daddr;



	fds[0] = socket(PF_INET, SOCK_DGRAM, 0);

	fds[1] = socket(PF_INET, SOCK_DGRAM, 0);

	if (fds[0] == -1 || fds[1] == -1) {

		fprintf(stderr, "ERROR: socket dgram\n");

		exit(1);

	}



	memset(&saddr, 0, sizeof(saddr));

	saddr.sin_family = AF_INET;

	saddr.sin_port = htons(port);

	saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);



	memset(&daddr, 0, sizeof(daddr));

	daddr.sin_family = AF_INET;

	daddr.sin_port = htons(port + 1);

	daddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

#include "psock_lib.h"



	/* must bind both to get consistent hash result */

	if (bind(fds[1], (void *) &daddr, sizeof(daddr))) {

		perror("bind");

		exit(1);

	}

	if (bind(fds[0], (void *) &saddr, sizeof(saddr))) {

		perror("bind");

		exit(1);

	}

	if (connect(fds[0], (void *) &daddr, sizeof(daddr))) {

		perror("connect");

		exit(1);

	}

}



static void pair_udp_send(int fds[], int num)

{

	char buf[DATA_LEN], rbuf[DATA_LEN];



	memset(buf, DATA_CHAR, sizeof(buf));

	while (num--) {

		/* Should really handle EINTR and EAGAIN */

		if (write(fds[0], buf, sizeof(buf)) != sizeof(buf)) {

			fprintf(stderr, "ERROR: send failed left=%d\n", num);

			exit(1);

		}

		if (read(fds[1], rbuf, sizeof(rbuf)) != sizeof(rbuf)) {

			fprintf(stderr, "ERROR: recv failed left=%d\n", num);

			exit(1);

		}

		if (memcmp(buf, rbuf, sizeof(buf))) {

			fprintf(stderr, "ERROR: data failed left=%d\n", num);

			exit(1);

		}

	}

}



static void sock_fanout_setfilter(int fd)

{

	struct sock_filter bpf_filter[] = {

		{ 0x80, 0, 0, 0x00000000 },  /* LD  pktlen		      */

		{ 0x35, 0, 5, DATA_LEN   },  /* JGE DATA_LEN  [f goto nomatch]*/

		{ 0x30, 0, 0, 0x00000050 },  /* LD  ip[80]		      */

		{ 0x15, 0, 3, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/

		{ 0x30, 0, 0, 0x00000051 },  /* LD  ip[81]		      */

		{ 0x15, 0, 1, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/

		{ 0x6, 0, 0, 0x00000060  },  /* RET match	              */

/* nomatch */	{ 0x6, 0, 0, 0x00000000  },  /* RET no match		      */

	};

	struct sock_fprog bpf_prog;



	bpf_prog.filter = bpf_filter;

	bpf_prog.len = sizeof(bpf_filter) / sizeof(struct sock_filter);

	if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &bpf_prog,

		       sizeof(bpf_prog))) {

		perror("setsockopt SO_ATTACH_FILTER");

		exit(1);

	}

}

#define RING_NUM_FRAMES			20



/* Open a socket in a given fanout mode.

 * @return -1 if mode is bad, a valid socket otherwise */
@@ -169,7 +87,7 @@ static int sock_fanout_open(uint16_t typeflags, int num_packets) 
		return -1;

	}



	sock_fanout_setfilter(fd);

	pair_udp_setfilter(fd);

	return fd;

}

tools/testing/selftests/net/psock_lib.h

0 → 100644
+127 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2013 Google Inc.

 * Author: Willem de Bruijn <willemb@google.com>

 *         Daniel Borkmann <dborkman@redhat.com>

 *

 * License (GPLv2):

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

 */



#ifndef PSOCK_LIB_H

#define PSOCK_LIB_H



#include <sys/types.h>

#include <sys/socket.h>

#include <string.h>

#include <arpa/inet.h>

#include <unistd.h>



#define DATA_LEN			100

#define DATA_CHAR			'a'



#define PORT_BASE			8000



#ifndef __maybe_unused

# define __maybe_unused		__attribute__ ((__unused__))

#endif



static __maybe_unused void pair_udp_setfilter(int fd)

{

	struct sock_filter bpf_filter[] = {

		{ 0x80, 0, 0, 0x00000000 },  /* LD  pktlen		      */

		{ 0x35, 0, 5, DATA_LEN   },  /* JGE DATA_LEN  [f goto nomatch]*/

		{ 0x30, 0, 0, 0x00000050 },  /* LD  ip[80]		      */

		{ 0x15, 0, 3, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/

		{ 0x30, 0, 0, 0x00000051 },  /* LD  ip[81]		      */

		{ 0x15, 0, 1, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/

		{ 0x06, 0, 0, 0x00000060 },  /* RET match	              */

		{ 0x06, 0, 0, 0x00000000 },  /* RET no match		      */

	};

	struct sock_fprog bpf_prog;



	bpf_prog.filter = bpf_filter;

	bpf_prog.len = sizeof(bpf_filter) / sizeof(struct sock_filter);

	if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &bpf_prog,

		       sizeof(bpf_prog))) {

		perror("setsockopt SO_ATTACH_FILTER");

		exit(1);

	}

}



static __maybe_unused void pair_udp_open(int fds[], uint16_t port)

{

	struct sockaddr_in saddr, daddr;



	fds[0] = socket(PF_INET, SOCK_DGRAM, 0);

	fds[1] = socket(PF_INET, SOCK_DGRAM, 0);

	if (fds[0] == -1 || fds[1] == -1) {

		fprintf(stderr, "ERROR: socket dgram\n");

		exit(1);

	}



	memset(&saddr, 0, sizeof(saddr));

	saddr.sin_family = AF_INET;

	saddr.sin_port = htons(port);

	saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);



	memset(&daddr, 0, sizeof(daddr));

	daddr.sin_family = AF_INET;

	daddr.sin_port = htons(port + 1);

	daddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);



	/* must bind both to get consistent hash result */

	if (bind(fds[1], (void *) &daddr, sizeof(daddr))) {

		perror("bind");

		exit(1);

	}

	if (bind(fds[0], (void *) &saddr, sizeof(saddr))) {

		perror("bind");

		exit(1);

	}

	if (connect(fds[0], (void *) &daddr, sizeof(daddr))) {

		perror("connect");

		exit(1);

	}

}



static __maybe_unused void pair_udp_send(int fds[], int num)

{

	char buf[DATA_LEN], rbuf[DATA_LEN];



	memset(buf, DATA_CHAR, sizeof(buf));

	while (num--) {

		/* Should really handle EINTR and EAGAIN */

		if (write(fds[0], buf, sizeof(buf)) != sizeof(buf)) {

			fprintf(stderr, "ERROR: send failed left=%d\n", num);

			exit(1);

		}

		if (read(fds[1], rbuf, sizeof(rbuf)) != sizeof(rbuf)) {

			fprintf(stderr, "ERROR: recv failed left=%d\n", num);

			exit(1);

		}

		if (memcmp(buf, rbuf, sizeof(buf))) {

			fprintf(stderr, "ERROR: data failed left=%d\n", num);

			exit(1);

		}

	}

}



static __maybe_unused void pair_udp_close(int fds[])

{

	close(fds[0]);

	close(fds[1]);

}



#endif /* PSOCK_LIB_H */

tools/testing/selftests/net/psock_tpacket.c

0 → 100644
+824 −0

File added.

Preview size limit exceeded, changes collapsed.

tools/testing/selftests/net/run_afpackettests

+10 −0
Original line number Diff line number Diff line
@@ -14,3 +14,13 @@ if [ $? -ne 0 ]; then 
else

	echo "[PASS]"

fi



echo "--------------------"

echo "running psock_tpacket test"

echo "--------------------"

./psock_tpacket

if [ $? -ne 0 ]; then

	echo "[FAIL]"

else

	echo "[PASS]"

fi