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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: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Daniel Borkmann
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David S. Miller
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Apr 7, 2013
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| #ifndef PSOCK_LIB_H | ||
| #define PSOCK_LIB_H | ||
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| #include <sys/types.h> | ||
| #include <sys/socket.h> | ||
| #include <string.h> | ||
| #include <arpa/inet.h> | ||
| #include <unistd.h> | ||
|
|
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| #define DATA_LEN 100 | ||
| #define DATA_CHAR 'a' | ||
|
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| #define PORT_BASE 8000 | ||
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| #ifndef __maybe_unused | ||
| # define __maybe_unused __attribute__ ((__unused__)) | ||
| #endif | ||
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| 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; | ||
|
|
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| 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); | ||
| } | ||
| } | ||
|
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| static __maybe_unused void pair_udp_open(int fds[], uint16_t port) | ||
| { | ||
| struct sockaddr_in saddr, daddr; | ||
|
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| 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); | ||
| } | ||
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| memset(&saddr, 0, sizeof(saddr)); | ||
| saddr.sin_family = AF_INET; | ||
| saddr.sin_port = htons(port); | ||
| saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | ||
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| memset(&daddr, 0, sizeof(daddr)); | ||
| daddr.sin_family = AF_INET; | ||
| daddr.sin_port = htons(port + 1); | ||
| daddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | ||
|
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| /* 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); | ||
| } | ||
| } | ||
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| static __maybe_unused void pair_udp_send(int fds[], int num) | ||
| { | ||
| char buf[DATA_LEN], rbuf[DATA_LEN]; | ||
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| 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); | ||
| } | ||
| } | ||
| } | ||
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| static __maybe_unused void pair_udp_close(int fds[]) | ||
| { | ||
| close(fds[0]); | ||
| close(fds[1]); | ||
| } | ||
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| #endif /* PSOCK_LIB_H */ |
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