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selftests/net: toeplitz test

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To verify that this hash implements the Toeplitz hash function.

Additionally, provide a script toeplitz.sh to run the test in loopback mode
on a networking device of choice (see setup_loopback.sh). Since the
script modifies the NIC setup, it will not be run by selftests
automatically.

Tested:
./toeplitz.sh -i eth0 -irq_prefix <eth0_pattern> -t -6
carrier ready
rxq 0: cpu 14
rxq 1: cpu 20
rxq 2: cpu 17
rxq 3: cpu 23
cpu 14: rx_hash 0x69103ebc [saddr fda8::2 daddr fda8::1 sport 58938 dport 8000] OK rxq 0 (cpu 14)
...
cpu 20: rx_hash 0x257118b9 [saddr fda8::2 daddr fda8::1 sport 59258 dport 8000] OK rxq 1 (cpu 20)
count: pass=111 nohash=0 fail=0
Test Succeeded!

Signed-off-by: Coco Li <lixiaoyan@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Coco Li 2021-08-05 07:36:41 +00:00 committed by David S. Miller
parent 7d1575014a
commit 5ebfb4cc30
4 changed files with 813 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/net/Makefile
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@ -41,6 +41,7 @@ TEST_GEN_FILES += ioam6_parser
TEST_GEN_FILES += gro TEST_GEN_FILES += gro
TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls
TEST_GEN_FILES += toeplitz
TEST_FILES := settings TEST_FILES := settings

585
tools/testing/selftests/net/toeplitz.c Normal file
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@ -0,0 +1,585 @@
// SPDX-License-Identifier: GPL-2.0
/* Toeplitz test
*
* 1. Read packets and their rx_hash using PF_PACKET/TPACKET_V3
* 2. Compute the rx_hash in software based on the packet contents
* 3. Compare the two
*
* Optionally, either '-C $rx_irq_cpu_list' or '-r $rps_bitmap' may be given.
*
* If '-C $rx_irq_cpu_list' is given, also
*
* 4. Identify the cpu on which the packet arrived with PACKET_FANOUT_CPU
* 5. Compute the rxqueue that RSS would select based on this rx_hash
* 6. Using the $rx_irq_cpu_list map, identify the arriving cpu based on rxq irq
* 7. Compare the cpus from 4 and 6
*
* Else if '-r $rps_bitmap' is given, also
*
* 4. Identify the cpu on which the packet arrived with PACKET_FANOUT_CPU
* 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
* 6. Compare the cpus from 4 and 5
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <getopt.h>
#include <linux/filter.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <net/if.h>
#include <netdb.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <poll.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysinfo.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#define TOEPLITZ_KEY_MIN_LEN 40
#define TOEPLITZ_KEY_MAX_LEN 60
#define TOEPLITZ_STR_LEN(K) (((K) * 3) - 1) /* hex encoded: AA:BB:CC:...:ZZ */
#define TOEPLITZ_STR_MIN_LEN TOEPLITZ_STR_LEN(TOEPLITZ_KEY_MIN_LEN)
#define TOEPLITZ_STR_MAX_LEN TOEPLITZ_STR_LEN(TOEPLITZ_KEY_MAX_LEN)
#define FOUR_TUPLE_MAX_LEN ((sizeof(struct in6_addr) * 2) + (sizeof(uint16_t) * 2))
#define RSS_MAX_CPUS (1 << 16) /* real constraint is PACKET_FANOUT_MAX */
#define RPS_MAX_CPUS 16UL /* must be a power of 2 */
/* configuration options (cmdline arguments) */
static uint16_t cfg_dport = 8000;
static int cfg_family = AF_INET6;
static char *cfg_ifname = "eth0";
static int cfg_num_queues;
static int cfg_num_rps_cpus;
static bool cfg_sink;
static int cfg_type = SOCK_STREAM;
static int cfg_timeout_msec = 1000;
static bool cfg_verbose;
/* global vars */
static int num_cpus;
static int ring_block_nr;
static int ring_block_sz;
/* stats */
static int frames_received;
static int frames_nohash;
static int frames_error;
#define log_verbose(args...) do { if (cfg_verbose) fprintf(stderr, args); } while (0)
/* tpacket ring */
struct ring_state {
int fd;
char *mmap;
int idx;
int cpu;
};
static unsigned int rx_irq_cpus[RSS_MAX_CPUS]; /* map from rxq to cpu */
static int rps_silo_to_cpu[RPS_MAX_CPUS];
static unsigned char toeplitz_key[TOEPLITZ_KEY_MAX_LEN];
static struct ring_state rings[RSS_MAX_CPUS];
static inline uint32_t toeplitz(const unsigned char *four_tuple,
const unsigned char *key)
{
int i, bit, ret = 0;
uint32_t key32;
key32 = ntohl(*((uint32_t *)key));
key += 4;
for (i = 0; i < FOUR_TUPLE_MAX_LEN; i++) {
for (bit = 7; bit >= 0; bit--) {
if (four_tuple[i] & (1 << bit))
ret ^= key32;
key32 <<= 1;
key32 |= !!(key[0] & (1 << bit));
}
key++;
}
return ret;
}
/* Compare computed cpu with arrival cpu from packet_fanout_cpu */
static void verify_rss(uint32_t rx_hash, int cpu)
{
int queue = rx_hash % cfg_num_queues;
log_verbose(" rxq %d (cpu %d)", queue, rx_irq_cpus[queue]);
if (rx_irq_cpus[queue] != cpu) {
log_verbose(". error: rss cpu mismatch (%d)", cpu);
frames_error++;
}
}
static void verify_rps(uint64_t rx_hash, int cpu)
{
int silo = (rx_hash * cfg_num_rps_cpus) >> 32;
log_verbose(" silo %d (cpu %d)", silo, rps_silo_to_cpu[silo]);
if (rps_silo_to_cpu[silo] != cpu) {
log_verbose(". error: rps cpu mismatch (%d)", cpu);
frames_error++;
}
}
static void log_rxhash(int cpu, uint32_t rx_hash,
const char *addrs, int addr_len)
{
char saddr[INET6_ADDRSTRLEN], daddr[INET6_ADDRSTRLEN];
uint16_t *ports;
if (!inet_ntop(cfg_family, addrs, saddr, sizeof(saddr)) ||
!inet_ntop(cfg_family, addrs + addr_len, daddr, sizeof(daddr)))
error(1, 0, "address parse error");
ports = (void *)addrs + (addr_len * 2);
log_verbose("cpu %d: rx_hash 0x%08x [saddr %s daddr %s sport %02hu dport %02hu]",
cpu, rx_hash, saddr, daddr,
ntohs(ports[0]), ntohs(ports[1]));
}
/* Compare computed rxhash with rxhash received from tpacket_v3 */
static void verify_rxhash(const char *pkt, uint32_t rx_hash, int cpu)
{
unsigned char four_tuple[FOUR_TUPLE_MAX_LEN] = {0};
uint32_t rx_hash_sw;
const char *addrs;
int addr_len;
if (cfg_family == AF_INET) {
addr_len = sizeof(struct in_addr);
addrs = pkt + offsetof(struct iphdr, saddr);
} else {
addr_len = sizeof(struct in6_addr);
addrs = pkt + offsetof(struct ip6_hdr, ip6_src);
}
memcpy(four_tuple, addrs, (addr_len * 2) + (sizeof(uint16_t) * 2));
rx_hash_sw = toeplitz(four_tuple, toeplitz_key);
if (cfg_verbose)
log_rxhash(cpu, rx_hash, addrs, addr_len);
if (rx_hash != rx_hash_sw) {
log_verbose(" != expected 0x%x\n", rx_hash_sw);
frames_error++;
return;
}
log_verbose(" OK");
if (cfg_num_queues)
verify_rss(rx_hash, cpu);
else if (cfg_num_rps_cpus)
verify_rps(rx_hash, cpu);
log_verbose("\n");
}
static char *recv_frame(const struct ring_state *ring, char *frame)
{
struct tpacket3_hdr *hdr = (void *)frame;
if (hdr->hv1.tp_rxhash)
verify_rxhash(frame + hdr->tp_net, hdr->hv1.tp_rxhash,
ring->cpu);
else
frames_nohash++;
return frame + hdr->tp_next_offset;
}
/* A single TPACKET_V3 block can hold multiple frames */
static void recv_block(struct ring_state *ring)
{
struct tpacket_block_desc *block;
char *frame;
int i;
block = (void *)(ring->mmap + ring->idx * ring_block_sz);
if (!(block->hdr.bh1.block_status & TP_STATUS_USER))
return;
frame = (char *)block;
frame += block->hdr.bh1.offset_to_first_pkt;
for (i = 0; i < block->hdr.bh1.num_pkts; i++) {
frame = recv_frame(ring, frame);
frames_received++;
}
block->hdr.bh1.block_status = TP_STATUS_KERNEL;
ring->idx = (ring->idx + 1) % ring_block_nr;
}
/* simple test: sleep once unconditionally and then process all rings */
static void process_rings(void)
{
int i;
usleep(1000 * cfg_timeout_msec);
for (i = 0; i < num_cpus; i++)
recv_block(&rings[i]);
fprintf(stderr, "count: pass=%u nohash=%u fail=%u\n",
frames_received - frames_nohash - frames_error,
frames_nohash, frames_error);
}
static char *setup_ring(int fd)
{
struct tpacket_req3 req3 = {0};
void *ring;
req3.tp_retire_blk_tov = cfg_timeout_msec;
req3.tp_feature_req_word = TP_FT_REQ_FILL_RXHASH;
req3.tp_frame_size = 2048;
req3.tp_frame_nr = 1 << 10;
req3.tp_block_nr = 2;
req3.tp_block_size = req3.tp_frame_size * req3.tp_frame_nr;
req3.tp_block_size /= req3.tp_block_nr;
if (setsockopt(fd, SOL_PACKET, PACKET_RX_RING, &req3, sizeof(req3)))
error(1, errno, "setsockopt PACKET_RX_RING");
ring_block_sz = req3.tp_block_size;
ring_block_nr = req3.tp_block_nr;
ring = mmap(0, req3.tp_block_size * req3.tp_block_nr,
PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_LOCKED | MAP_POPULATE, fd, 0);
if (ring == MAP_FAILED)
error(1, 0, "mmap failed");
return ring;
}
static void __set_filter(int fd, int off_proto, uint8_t proto, int off_dport)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD + BPF_B + BPF_ABS, SKF_AD_OFF + SKF_AD_PKTTYPE),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, PACKET_HOST, 0, 4),
BPF_STMT(BPF_LD + BPF_B + BPF_ABS, off_proto),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, proto, 0, 2),
BPF_STMT(BPF_LD + BPF_H + BPF_ABS, off_dport),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, cfg_dport, 1, 0),
BPF_STMT(BPF_RET + BPF_K, 0),
BPF_STMT(BPF_RET + BPF_K, 0xFFFF),
};
struct sock_fprog prog = {};
prog.filter = filter;
prog.len = sizeof(filter) / sizeof(struct sock_filter);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)))
error(1, errno, "setsockopt filter");
}
/* filter on transport protocol and destination port */
static void set_filter(int fd)
{
const int off_dport = offsetof(struct tcphdr, dest); /* same for udp */
uint8_t proto;
proto = cfg_type == SOCK_STREAM ? IPPROTO_TCP : IPPROTO_UDP;
if (cfg_family == AF_INET)
__set_filter(fd, offsetof(struct iphdr, protocol), proto,
sizeof(struct iphdr) + off_dport);
else
__set_filter(fd, offsetof(struct ip6_hdr, ip6_nxt), proto,
sizeof(struct ip6_hdr) + off_dport);
}
/* drop everything: used temporarily during setup */
static void set_filter_null(int fd)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_RET + BPF_K, 0),
};
struct sock_fprog prog = {};
prog.filter = filter;
prog.len = sizeof(filter) / sizeof(struct sock_filter);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)))
error(1, errno, "setsockopt filter");
}
static int create_ring(char **ring)
{
struct fanout_args args = {
.id = 1,
.type_flags = PACKET_FANOUT_CPU,
.max_num_members = RSS_MAX_CPUS
};
struct sockaddr_ll ll = { 0 };
int fd, val;
fd = socket(PF_PACKET, SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket creation failed");
val = TPACKET_V3;
if (setsockopt(fd, SOL_PACKET, PACKET_VERSION, &val, sizeof(val)))
error(1, errno, "setsockopt PACKET_VERSION");
*ring = setup_ring(fd);
/* block packets until all rings are added to the fanout group:
* else packets can arrive during setup and get misclassified
*/
set_filter_null(fd);
ll.sll_family = AF_PACKET;
ll.sll_ifindex = if_nametoindex(cfg_ifname);
ll.sll_protocol = cfg_family == AF_INET ? htons(ETH_P_IP) :
htons(ETH_P_IPV6);
if (bind(fd, (void *)&ll, sizeof(ll)))
error(1, errno, "bind");
/* must come after bind: verifies all programs in group match */
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &args, sizeof(args))) {
/* on failure, retry using old API if that is sufficient:
* it has a hard limit of 256 sockets, so only try if
* (a) only testing rxhash, not RSS or (b) <= 256 cpus.
* in this API, the third argument is left implicit.
*/
if (cfg_num_queues || num_cpus > 256 ||
setsockopt(fd, SOL_PACKET, PACKET_FANOUT,
&args, sizeof(uint32_t)))
error(1, errno, "setsockopt PACKET_FANOUT cpu");
}
return fd;
}
/* setup inet(6) socket to blackhole the test traffic, if arg '-s' */
static int setup_sink(void)
{
int fd, val;
fd = socket(cfg_family, cfg_type, 0);
if (fd == -1)
error(1, errno, "socket %d.%d", cfg_family, cfg_type);
val = 1 << 20;
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &val, sizeof(val)))
error(1, errno, "setsockopt rcvbuf");
return fd;
}
static void setup_rings(void)
{
int i;
for (i = 0; i < num_cpus; i++) {
rings[i].cpu = i;
rings[i].fd = create_ring(&rings[i].mmap);
}
/* accept packets once all rings in the fanout group are up */
for (i = 0; i < num_cpus; i++)
set_filter(rings[i].fd);
}
static void cleanup_rings(void)
{
int i;
for (i = 0; i < num_cpus; i++) {
if (munmap(rings[i].mmap, ring_block_nr * ring_block_sz))
error(1, errno, "munmap");
if (close(rings[i].fd))
error(1, errno, "close");
}
}
static void parse_cpulist(const char *arg)
{
do {
rx_irq_cpus[cfg_num_queues++] = strtol(arg, NULL, 10);
arg = strchr(arg, ',');
if (!arg)
break;
arg++; // skip ','
} while (1);
}
static void show_cpulist(void)
{
int i;
for (i = 0; i < cfg_num_queues; i++)
fprintf(stderr, "rxq %d: cpu %d\n", i, rx_irq_cpus[i]);
}
static void show_silos(void)
{
int i;
for (i = 0; i < cfg_num_rps_cpus; i++)
fprintf(stderr, "silo %d: cpu %d\n", i, rps_silo_to_cpu[i]);
}
static void parse_toeplitz_key(const char *str, int slen, unsigned char *key)
{
int i, ret, off;
if (slen < TOEPLITZ_STR_MIN_LEN ||
slen > TOEPLITZ_STR_MAX_LEN + 1)
error(1, 0, "invalid toeplitz key");
for (i = 0, off = 0; off < slen; i++, off += 3) {
ret = sscanf(str + off, "%hhx", &key[i]);
if (ret != 1)
error(1, 0, "key parse error at %d off %d len %d",
i, off, slen);
}
}
static void parse_rps_bitmap(const char *arg)
{
unsigned long bitmap;
int i;
bitmap = strtoul(arg, NULL, 0);
if (bitmap & ~(RPS_MAX_CPUS - 1))
error(1, 0, "rps bitmap 0x%lx out of bounds 0..%lu",
bitmap, RPS_MAX_CPUS - 1);
for (i = 0; i < RPS_MAX_CPUS; i++)
if (bitmap & 1UL << i)
rps_silo_to_cpu[cfg_num_rps_cpus++] = i;
}
static void parse_opts(int argc, char **argv)
{
static struct option long_options[] = {
{"dport", required_argument, 0, 'd'},
{"cpus", required_argument, 0, 'C'},
{"key", required_argument, 0, 'k'},
{"iface", required_argument, 0, 'i'},
{"ipv4", no_argument, 0, '4'},
{"ipv6", no_argument, 0, '6'},
{"sink", no_argument, 0, 's'},
{"tcp", no_argument, 0, 't'},
{"timeout", required_argument, 0, 'T'},
{"udp", no_argument, 0, 'u'},
{"verbose", no_argument, 0, 'v'},
{"rps", required_argument, 0, 'r'},
{0, 0, 0, 0}
};
bool have_toeplitz = false;
int index, c;
while ((c = getopt_long(argc, argv, "46C:d:i:k:r:stT:u:v", long_options, &index)) != -1) {
switch (c) {
case '4':
cfg_family = AF_INET;
break;
case '6':
cfg_family = AF_INET6;
break;
case 'C':
parse_cpulist(optarg);
break;
case 'd':
cfg_dport = strtol(optarg, NULL, 0);
break;
case 'i':
cfg_ifname = optarg;
break;
case 'k':
parse_toeplitz_key(optarg, strlen(optarg),
toeplitz_key);
have_toeplitz = true;
break;
case 'r':
parse_rps_bitmap(optarg);
break;
case 's':
cfg_sink = true;
break;
case 't':
cfg_type = SOCK_STREAM;
break;
case 'T':
cfg_timeout_msec = strtol(optarg, NULL, 0);
break;
case 'u':
cfg_type = SOCK_DGRAM;
break;
case 'v':
cfg_verbose = true;
break;
default:
error(1, 0, "unknown option %c", optopt);
break;
}
}
if (!have_toeplitz)
error(1, 0, "Must supply rss key ('-k')");
num_cpus = get_nprocs();
if (num_cpus > RSS_MAX_CPUS)
error(1, 0, "increase RSS_MAX_CPUS");
if (cfg_num_queues && cfg_num_rps_cpus)
error(1, 0,
"Can't supply both RSS cpus ('-C') and RPS map ('-r')");
if (cfg_verbose) {
show_cpulist();
show_silos();
}
}
int main(int argc, char **argv)
{
const int min_tests = 10;
int fd_sink = -1;
parse_opts(argc, argv);
if (cfg_sink)
fd_sink = setup_sink();
setup_rings();
process_rings();
cleanup_rings();
if (cfg_sink && close(fd_sink))
error(1, errno, "close sink");
if (frames_received - frames_nohash < min_tests)
error(1, 0, "too few frames for verification");
return frames_error;
}

199
tools/testing/selftests/net/toeplitz.sh Executable file
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@ -0,0 +1,199 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# extended toeplitz test: test rxhash plus, optionally, either (1) rss mapping
# from rxhash to rx queue ('-rss') or (2) rps mapping from rxhash to cpu
# ('-rps <rps_map>')
#
# irq-pattern-prefix can be derived from /sys/kernel/irq/*/action,
# which is a driver-specific encoding.
#
# invoke as ./toeplitz.sh (-i <iface>) -u|-t -4|-6 \
# [(-rss -irq_prefix <irq-pattern-prefix>)|(-rps <rps_map>)]
source setup_loopback.sh
readonly SERVER_IP4="192.168.1.200/24"
readonly SERVER_IP6="fda8::1/64"
readonly SERVER_MAC="aa:00:00:00:00:02"
readonly CLIENT_IP4="192.168.1.100/24"
readonly CLIENT_IP6="fda8::2/64"
readonly CLIENT_MAC="aa:00:00:00:00:01"
PORT=8000
KEY="$(</proc/sys/net/core/netdev_rss_key)"
TEST_RSS=false
RPS_MAP=""
PROTO_FLAG=""
IP_FLAG=""
DEV="eth0"
# Return the number of rxqs among which RSS is configured to spread packets.
# This is determined by reading the RSS indirection table using ethtool.
get_rss_cfg_num_rxqs() {
echo $(ethtool -x "${DEV}" |
egrep [[:space:]]+[0-9]+:[[:space:]]+ |
cut -d: -f2- |
awk '{$1=$1};1' |
tr ' ' '\n' |
sort -u |
wc -l)
}
# Return a list of the receive irq handler cpus.
# The list is ordered by the irqs, so first rxq-0 cpu, then rxq-1 cpu, etc.
# Reads /sys/kernel/irq/ in order, so algorithm depends on
# irq_{rxq-0} < irq_{rxq-1}, etc.
get_rx_irq_cpus() {
CPUS=""
# sort so that irq 2 is read before irq 10
SORTED_IRQS=$(for i in /sys/kernel/irq/*; do echo $i; done | sort -V)
# Consider only as many queues as RSS actually uses. We assume that
# if RSS_CFG_NUM_RXQS=N, then RSS uses rxqs 0-(N-1).
RSS_CFG_NUM_RXQS=$(get_rss_cfg_num_rxqs)
RXQ_COUNT=0
for i in ${SORTED_IRQS}
do
[[ "${RXQ_COUNT}" -lt "${RSS_CFG_NUM_RXQS}" ]] || break
# lookup relevant IRQs by action name
[[ -e "$i/actions" ]] || continue
cat "$i/actions" | grep -q "${IRQ_PATTERN}" || continue
irqname=$(<"$i/actions")
# does the IRQ get called
irqcount=$(cat "$i/per_cpu_count" | tr -d '0,')
[[ -n "${irqcount}" ]] || continue
# lookup CPU
irq=$(basename "$i")
cpu=$(cat "/proc/irq/$irq/smp_affinity_list")
if [[ -z "${CPUS}" ]]; then
CPUS="${cpu}"
else
CPUS="${CPUS},${cpu}"
fi
RXQ_COUNT=$((RXQ_COUNT+1))
done
echo "${CPUS}"
}
get_disable_rfs_cmd() {
echo "echo 0 > /proc/sys/net/core/rps_sock_flow_entries;"
}
get_set_rps_bitmaps_cmd() {
CMD=""
for i in /sys/class/net/${DEV}/queues/rx-*/rps_cpus
do
CMD="${CMD} echo $1 > ${i};"
done
echo "${CMD}"
}
get_disable_rps_cmd() {
echo "$(get_set_rps_bitmaps_cmd 0)"
}
die() {
echo "$1"
exit 1
}
check_nic_rxhash_enabled() {
local -r pattern="receive-hashing:\ on"
ethtool -k "${DEV}" | grep -q "${pattern}" || die "rxhash must be enabled"
}
parse_opts() {
local prog=$0
shift 1
while [[ "$1" =~ "-" ]]; do
if [[ "$1" = "-irq_prefix" ]]; then
shift
IRQ_PATTERN="^$1-[0-9]*$"
elif [[ "$1" = "-u" || "$1" = "-t" ]]; then
PROTO_FLAG="$1"
elif [[ "$1" = "-4" ]]; then
IP_FLAG="$1"
SERVER_IP="${SERVER_IP4}"
CLIENT_IP="${CLIENT_IP4}"
elif [[ "$1" = "-6" ]]; then
IP_FLAG="$1"
SERVER_IP="${SERVER_IP6}"
CLIENT_IP="${CLIENT_IP6}"
elif [[ "$1" = "-rss" ]]; then
TEST_RSS=true
elif [[ "$1" = "-rps" ]]; then
shift
RPS_MAP="$1"
elif [[ "$1" = "-i" ]]; then
shift
DEV="$1"
else
die "Usage: ${prog} (-i <iface>) -u|-t -4|-6 \
[(-rss -irq_prefix <irq-pattern-prefix>)|(-rps <rps_map>)]"
fi
shift
done
}
setup() {
setup_loopback_environment "${DEV}"
# Set up server_ns namespace and client_ns namespace
setup_macvlan_ns "${DEV}" server_ns server \
"${SERVER_MAC}" "${SERVER_IP}"
setup_macvlan_ns "${DEV}" client_ns client \
"${CLIENT_MAC}" "${CLIENT_IP}"
}
cleanup() {
cleanup_macvlan_ns server_ns server client_ns client
cleanup_loopback "${DEV}"
}
parse_opts $0 $@
setup
trap cleanup EXIT
check_nic_rxhash_enabled
# Actual test starts here
if [[ "${TEST_RSS}" = true ]]; then
# RPS/RFS must be disabled because they move packets between cpus,
# which breaks the PACKET_FANOUT_CPU identification of RSS decisions.
eval "$(get_disable_rfs_cmd) $(get_disable_rps_cmd)" \
ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \
-d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 \
-C "$(get_rx_irq_cpus)" -s -v &
elif [[ ! -z "${RPS_MAP}" ]]; then
eval "$(get_disable_rfs_cmd) $(get_set_rps_bitmaps_cmd ${RPS_MAP})" \
ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \
-d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 \
-r "0x${RPS_MAP}" -s -v &
else
ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \
-d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 -s -v &
fi
server_pid=$!
ip netns exec client_ns ./toeplitz_client.sh "${PROTO_FLAG}" \
"${IP_FLAG}" "${SERVER_IP%%/*}" "${PORT}" &
client_pid=$!
wait "${server_pid}"
exit_code=$?
kill -9 "${client_pid}"
if [[ "${exit_code}" -eq 0 ]]; then
echo "Test Succeeded!"
fi
exit "${exit_code}"

28
tools/testing/selftests/net/toeplitz_client.sh Executable file
View File

@ -0,0 +1,28 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# A simple program for generating traffic for the toeplitz test.
#
# This program sends packets periodically for, conservatively, 20 seconds. The
# intent is for the calling program to kill this program once it is no longer
# needed, rather than waiting for the 20 second expiration.
send_traffic() {
expiration=$((SECONDS+20))
while [[ "${SECONDS}" -lt "${expiration}" ]]
do
if [[ "${PROTO}" == "-u" ]]; then
echo "msg $i" | nc "${IPVER}" -u -w 0 "${ADDR}" "${PORT}"
else
echo "msg $i" | nc "${IPVER}" -w 0 "${ADDR}" "${PORT}"
fi
sleep 0.001
done
}
PROTO=$1
IPVER=$2
ADDR=$3
PORT=$4
send_traffic