1 files changed, 0 insertions, 589 deletions

diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
deleted file mode 100644
index 9ba03164d73a..000000000000
--- a/tools/testing/selftests/net/toeplitz.c
+++ /dev/null
@@ -1,589 +0,0 @@
-// 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>
-
-#include "../kselftest.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 bool 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 false;
-
-	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;
-
-	return true;
-}
-
-/* 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++)
-		do {} while (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 / 8;
-	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 = 16;
-
-	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 = ARRAY_SIZE(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 = ARRAY_SIZE(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:uv", 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;
-}