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|
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2020 Intel Corporation. */
/*
* Some functions in this program are taken from
* Linux kernel samples/bpf/xdpsock* and modified
* for use.
*
* See test_xsk.sh for detailed information on test topology
* and prerequisite network setup.
*
* This test program contains two threads, each thread is single socket with
* a unique UMEM. It validates in-order packet delivery and packet content
* by sending packets to each other.
*
* Tests Information:
* ------------------
* These selftests test AF_XDP SKB and Native/DRV modes using veth
* Virtual Ethernet interfaces.
*
* For each mode, the following tests are run:
* a. nopoll - soft-irq processing
* b. poll - using poll() syscall
* c. Socket Teardown
* Create a Tx and a Rx socket, Tx from one socket, Rx on another. Destroy
* both sockets, then repeat multiple times. Only nopoll mode is used
* d. Bi-directional sockets
* Configure sockets as bi-directional tx/rx sockets, sets up fill and
* completion rings on each socket, tx/rx in both directions. Only nopoll
* mode is used
* e. Statistics
* Trigger some error conditions and ensure that the appropriate statistics
* are incremented. Within this test, the following statistics are tested:
* i. rx dropped
* Increase the UMEM frame headroom to a value which results in
* insufficient space in the rx buffer for both the packet and the headroom.
* ii. tx invalid
* Set the 'len' field of tx descriptors to an invalid value (umem frame
* size + 1).
* iii. rx ring full
* Reduce the size of the RX ring to a fraction of the fill ring size.
* iv. fill queue empty
* Do not populate the fill queue and then try to receive pkts.
* f. bpf_link resource persistence
* Configure sockets at indexes 0 and 1, run a traffic on queue ids 0,
* then remove xsk sockets from queue 0 on both veth interfaces and
* finally run a traffic on queues ids 1
*
* Total tests: 12
*
* Flow:
* -----
* - Single process spawns two threads: Tx and Rx
* - Each of these two threads attach to a veth interface within their assigned
* namespaces
* - Each thread Creates one AF_XDP socket connected to a unique umem for each
* veth interface
* - Tx thread Transmits 10k packets from veth<xxxx> to veth<yyyy>
* - Rx thread verifies if all 10k packets were received and delivered in-order,
* and have the right content
*
* Enable/disable packet dump mode:
* --------------------------
* To enable L2 - L4 headers and payload dump of each packet on STDOUT, add
* parameter -D to params array in test_xsk.sh, i.e. params=("-S" "-D")
*/
#define _GNU_SOURCE
#include <fcntl.h>
#include <errno.h>
#include <getopt.h>
#include <asm/barrier.h>
#include <linux/if_link.h>
#include <linux/if_ether.h>
#include <linux/ip.h>
#include <linux/udp.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <locale.h>
#include <poll.h>
#include <pthread.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <time.h>
#include <unistd.h>
#include <stdatomic.h>
#include <bpf/xsk.h>
#include "xdpxceiver.h"
#include "../kselftest.h"
static const char *MAC1 = "\x00\x0A\x56\x9E\xEE\x62";
static const char *MAC2 = "\x00\x0A\x56\x9E\xEE\x61";
static const char *IP1 = "192.168.100.162";
static const char *IP2 = "192.168.100.161";
static const u16 UDP_PORT1 = 2020;
static const u16 UDP_PORT2 = 2121;
static void __exit_with_error(int error, const char *file, const char *func, int line)
{
if (configured_mode == TEST_MODE_UNCONFIGURED) {
ksft_exit_fail_msg
("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, strerror(error));
} else {
ksft_test_result_fail
("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, strerror(error));
ksft_exit_xfail();
}
}
#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
#define print_ksft_result(void)\
(ksft_test_result_pass("PASS: %s %s %s%s%s%s\n", configured_mode ? "DRV" : "SKB",\
test_type == TEST_TYPE_POLL ? "POLL" : "NOPOLL",\
test_type == TEST_TYPE_TEARDOWN ? "Socket Teardown" : "",\
test_type == TEST_TYPE_BIDI ? "Bi-directional Sockets" : "",\
test_type == TEST_TYPE_STATS ? "Stats" : "",\
test_type == TEST_TYPE_BPF_RES ? "BPF RES" : ""))
static void memset32_htonl(void *dest, u32 val, u32 size)
{
u32 *ptr = (u32 *)dest;
int i;
val = htonl(val);
for (i = 0; i < (size & (~0x3)); i += 4)
ptr[i >> 2] = val;
}
/*
* Fold a partial checksum
* This function code has been taken from
* Linux kernel include/asm-generic/checksum.h
*/
static __u16 csum_fold(__u32 csum)
{
u32 sum = (__force u32)csum;
sum = (sum & 0xffff) + (sum >> 16);
sum = (sum & 0xffff) + (sum >> 16);
return (__force __u16)~sum;
}
/*
* This function code has been taken from
* Linux kernel lib/checksum.c
*/
static u32 from64to32(u64 x)
{
/* add up 32-bit and 32-bit for 32+c bit */
x = (x & 0xffffffff) + (x >> 32);
/* add up carry.. */
x = (x & 0xffffffff) + (x >> 32);
return (u32)x;
}
/*
* This function code has been taken from
* Linux kernel lib/checksum.c
*/
static __u32 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __u32 sum)
{
unsigned long long s = (__force u32)sum;
s += (__force u32)saddr;
s += (__force u32)daddr;
#ifdef __BIG_ENDIAN__
s += proto + len;
#else
s += (proto + len) << 8;
#endif
return (__force __u32)from64to32(s);
}
/*
* This function has been taken from
* Linux kernel include/asm-generic/checksum.h
*/
static __u16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __u32 sum)
{
return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
}
static u16 udp_csum(u32 saddr, u32 daddr, u32 len, u8 proto, u16 *udp_pkt)
{
u32 csum = 0;
u32 cnt = 0;
/* udp hdr and data */
for (; cnt < len; cnt += 2)
csum += udp_pkt[cnt >> 1];
return csum_tcpudp_magic(saddr, daddr, len, proto, csum);
}
static void gen_eth_hdr(struct ifobject *ifobject, struct ethhdr *eth_hdr)
{
memcpy(eth_hdr->h_dest, ifobject->dst_mac, ETH_ALEN);
memcpy(eth_hdr->h_source, ifobject->src_mac, ETH_ALEN);
eth_hdr->h_proto = htons(ETH_P_IP);
}
static void gen_ip_hdr(struct ifobject *ifobject, struct iphdr *ip_hdr)
{
ip_hdr->version = IP_PKT_VER;
ip_hdr->ihl = 0x5;
ip_hdr->tos = IP_PKT_TOS;
ip_hdr->tot_len = htons(IP_PKT_SIZE);
ip_hdr->id = 0;
ip_hdr->frag_off = 0;
ip_hdr->ttl = IPDEFTTL;
ip_hdr->protocol = IPPROTO_UDP;
ip_hdr->saddr = ifobject->src_ip;
ip_hdr->daddr = ifobject->dst_ip;
ip_hdr->check = 0;
}
static void gen_udp_hdr(u32 payload, void *pkt, struct ifobject *ifobject,
struct udphdr *udp_hdr)
{
udp_hdr->source = htons(ifobject->src_port);
udp_hdr->dest = htons(ifobject->dst_port);
udp_hdr->len = htons(UDP_PKT_SIZE);
memset32_htonl(pkt + PKT_HDR_SIZE, payload, UDP_PKT_DATA_SIZE);
}
static void gen_udp_csum(struct udphdr *udp_hdr, struct iphdr *ip_hdr)
{
udp_hdr->check = 0;
udp_hdr->check =
udp_csum(ip_hdr->saddr, ip_hdr->daddr, UDP_PKT_SIZE, IPPROTO_UDP, (u16 *)udp_hdr);
}
static void xsk_configure_umem(struct ifobject *data, void *buffer, u64 size, int idx)
{
struct xsk_umem_config cfg = {
.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
.frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
.frame_headroom = frame_headroom,
.flags = XSK_UMEM__DEFAULT_FLAGS
};
struct xsk_umem_info *umem;
int ret;
umem = calloc(1, sizeof(struct xsk_umem_info));
if (!umem)
exit_with_error(errno);
ret = xsk_umem__create(&umem->umem, buffer, size,
&umem->fq, &umem->cq, &cfg);
if (ret)
exit_with_error(-ret);
umem->buffer = buffer;
data->umem_arr[idx] = umem;
}
static void xsk_populate_fill_ring(struct xsk_umem_info *umem)
{
int ret, i;
u32 idx = 0;
ret = xsk_ring_prod__reserve(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS, &idx);
if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS)
exit_with_error(-ret);
for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS; i++)
*xsk_ring_prod__fill_addr(&umem->fq, idx++) = i * XSK_UMEM__DEFAULT_FRAME_SIZE;
xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS);
}
static int xsk_configure_socket(struct ifobject *ifobject, int idx)
{
struct xsk_socket_config cfg;
struct xsk_socket_info *xsk;
struct xsk_ring_cons *rxr;
struct xsk_ring_prod *txr;
int ret;
xsk = calloc(1, sizeof(struct xsk_socket_info));
if (!xsk)
exit_with_error(errno);
xsk->umem = ifobject->umem;
cfg.rx_size = rxqsize;
cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
cfg.libbpf_flags = 0;
cfg.xdp_flags = xdp_flags;
cfg.bind_flags = xdp_bind_flags;
if (test_type != TEST_TYPE_BIDI) {
rxr = (ifobject->fv.vector == rx) ? &xsk->rx : NULL;
txr = (ifobject->fv.vector == tx) ? &xsk->tx : NULL;
} else {
rxr = &xsk->rx;
txr = &xsk->tx;
}
ret = xsk_socket__create(&xsk->xsk, ifobject->ifname, idx,
ifobject->umem->umem, rxr, txr, &cfg);
if (ret)
return 1;
ifobject->xsk_arr[idx] = xsk;
return 0;
}
static struct option long_options[] = {
{"interface", required_argument, 0, 'i'},
{"queue", optional_argument, 0, 'q'},
{"dump-pkts", optional_argument, 0, 'D'},
{"verbose", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
static void usage(const char *prog)
{
const char *str =
" Usage: %s [OPTIONS]\n"
" Options:\n"
" -i, --interface Use interface\n"
" -q, --queue=n Use queue n (default 0)\n"
" -D, --dump-pkts Dump packets L2 - L5\n"
" -v, --verbose Verbose output\n";
ksft_print_msg(str, prog);
}
static int switch_namespace(const char *nsname)
{
char fqns[26] = "/var/run/netns/";
int nsfd;
if (!nsname || strlen(nsname) == 0)
return -1;
strncat(fqns, nsname, sizeof(fqns) - strlen(fqns) - 1);
nsfd = open(fqns, O_RDONLY);
if (nsfd == -1)
exit_with_error(errno);
if (setns(nsfd, 0) == -1)
exit_with_error(errno);
print_verbose("NS switched: %s\n", nsname);
return nsfd;
}
static int validate_interfaces(void)
{
bool ret = true;
for (int i = 0; i < MAX_INTERFACES; i++) {
if (!strcmp(ifdict[i]->ifname, "")) {
ret = false;
ksft_test_result_fail("ERROR: interfaces: -i <int>,<ns> -i <int>,<ns>.");
}
}
return ret;
}
static void parse_command_line(int argc, char **argv)
{
int option_index, interface_index = 0, c;
opterr = 0;
for (;;) {
c = getopt_long(argc, argv, "i:Dv", long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'i':
if (interface_index == MAX_INTERFACES)
break;
char *sptr, *token;
sptr = strndupa(optarg, strlen(optarg));
memcpy(ifdict[interface_index]->ifname,
strsep(&sptr, ","), MAX_INTERFACE_NAME_CHARS);
token = strsep(&sptr, ",");
if (token)
memcpy(ifdict[interface_index]->nsname, token,
MAX_INTERFACES_NAMESPACE_CHARS);
interface_index++;
break;
case 'D':
debug_pkt_dump = 1;
break;
case 'v':
opt_verbose = 1;
break;
default:
usage(basename(argv[0]));
ksft_exit_xfail();
}
}
if (!validate_interfaces()) {
usage(basename(argv[0]));
ksft_exit_xfail();
}
}
static struct pkt *pkt_stream_get_pkt(struct pkt_stream *pkt_stream, u32 pkt_nb)
{
if (pkt_nb >= pkt_stream->nb_pkts)
return NULL;
return &pkt_stream->pkts[pkt_nb];
}
static struct pkt_stream *pkt_stream_generate(u32 nb_pkts, u32 pkt_len)
{
struct pkt_stream *pkt_stream;
u32 i;
pkt_stream = malloc(sizeof(*pkt_stream));
if (!pkt_stream)
exit_with_error(ENOMEM);
pkt_stream->pkts = calloc(nb_pkts, sizeof(*pkt_stream->pkts));
if (!pkt_stream->pkts)
exit_with_error(ENOMEM);
pkt_stream->nb_pkts = nb_pkts;
for (i = 0; i < nb_pkts; i++) {
pkt_stream->pkts[i].addr = (i % num_frames) * XSK_UMEM__DEFAULT_FRAME_SIZE;
pkt_stream->pkts[i].len = pkt_len;
pkt_stream->pkts[i].payload = i;
}
return pkt_stream;
}
static struct pkt *pkt_generate(struct ifobject *ifobject, u32 pkt_nb)
{
struct pkt *pkt = pkt_stream_get_pkt(ifobject->pkt_stream, pkt_nb);
struct udphdr *udp_hdr;
struct ethhdr *eth_hdr;
struct iphdr *ip_hdr;
void *data;
if (!pkt)
return NULL;
data = xsk_umem__get_data(ifobject->umem->buffer, pkt->addr);
udp_hdr = (struct udphdr *)(data + sizeof(struct ethhdr) + sizeof(struct iphdr));
ip_hdr = (struct iphdr *)(data + sizeof(struct ethhdr));
eth_hdr = (struct ethhdr *)data;
gen_udp_hdr(pkt_nb, data, ifobject, udp_hdr);
gen_ip_hdr(ifobject, ip_hdr);
gen_udp_csum(udp_hdr, ip_hdr);
gen_eth_hdr(ifobject, eth_hdr);
return pkt;
}
static void pkt_dump(void *pkt, u32 len)
{
char s[INET_ADDRSTRLEN];
struct ethhdr *ethhdr;
struct udphdr *udphdr;
struct iphdr *iphdr;
int payload, i;
ethhdr = pkt;
iphdr = pkt + sizeof(*ethhdr);
udphdr = pkt + sizeof(*ethhdr) + sizeof(*iphdr);
/*extract L2 frame */
fprintf(stdout, "DEBUG>> L2: dst mac: ");
for (i = 0; i < ETH_ALEN; i++)
fprintf(stdout, "%02X", ethhdr->h_dest[i]);
fprintf(stdout, "\nDEBUG>> L2: src mac: ");
for (i = 0; i < ETH_ALEN; i++)
fprintf(stdout, "%02X", ethhdr->h_source[i]);
/*extract L3 frame */
fprintf(stdout, "\nDEBUG>> L3: ip_hdr->ihl: %02X\n", iphdr->ihl);
fprintf(stdout, "DEBUG>> L3: ip_hdr->saddr: %s\n",
inet_ntop(AF_INET, &iphdr->saddr, s, sizeof(s)));
fprintf(stdout, "DEBUG>> L3: ip_hdr->daddr: %s\n",
inet_ntop(AF_INET, &iphdr->daddr, s, sizeof(s)));
/*extract L4 frame */
fprintf(stdout, "DEBUG>> L4: udp_hdr->src: %d\n", ntohs(udphdr->source));
fprintf(stdout, "DEBUG>> L4: udp_hdr->dst: %d\n", ntohs(udphdr->dest));
/*extract L5 frame */
payload = *((uint32_t *)(pkt + PKT_HDR_SIZE));
fprintf(stdout, "DEBUG>> L5: payload: %d\n", payload);
fprintf(stdout, "---------------------------------------\n");
}
static bool is_pkt_valid(struct pkt *pkt, void *buffer, const struct xdp_desc *desc)
{
void *data = xsk_umem__get_data(buffer, desc->addr);
struct iphdr *iphdr = (struct iphdr *)(data + sizeof(struct ethhdr));
if (!pkt) {
ksft_test_result_fail("ERROR: [%s] too many packets received\n", __func__);
return false;
}
if (iphdr->version == IP_PKT_VER && iphdr->tos == IP_PKT_TOS) {
u32 seqnum = ntohl(*((u32 *)(data + PKT_HDR_SIZE)));
if (debug_pkt_dump && test_type != TEST_TYPE_STATS)
pkt_dump(data, PKT_SIZE);
if (pkt->len != desc->len) {
ksft_test_result_fail
("ERROR: [%s] expected length [%d], got length [%d]\n",
__func__, pkt->len, desc->len);
return false;
}
if (pkt->payload != seqnum) {
ksft_test_result_fail
("ERROR: [%s] expected seqnum [%d], got seqnum [%d]\n",
__func__, pkt->payload, seqnum);
return false;
}
} else {
ksft_print_msg("Invalid frame received: ");
ksft_print_msg("[IP_PKT_VER: %02X], [IP_PKT_TOS: %02X]\n", iphdr->version,
iphdr->tos);
return false;
}
return true;
}
static void kick_tx(struct xsk_socket_info *xsk)
{
int ret;
ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY || errno == ENETDOWN)
return;
exit_with_error(errno);
}
static void complete_pkts(struct xsk_socket_info *xsk, int batch_size)
{
unsigned int rcvd;
u32 idx;
if (!xsk->outstanding_tx)
return;
if (xsk_ring_prod__needs_wakeup(&xsk->tx))
kick_tx(xsk);
rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
if (rcvd) {
xsk_ring_cons__release(&xsk->umem->cq, rcvd);
xsk->outstanding_tx -= rcvd;
}
}
static void receive_pkts(struct pkt_stream *pkt_stream, struct xsk_socket_info *xsk,
struct pollfd *fds)
{
u32 idx_rx = 0, idx_fq = 0, rcvd, i, pkt_count = 0;
struct pkt *pkt;
int ret;
pkt = pkt_stream_get_pkt(pkt_stream, pkt_count++);
while (pkt) {
rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
if (!rcvd) {
if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
ret = poll(fds, 1, POLL_TMOUT);
if (ret < 0)
exit_with_error(-ret);
}
continue;
}
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
while (ret != rcvd) {
if (ret < 0)
exit_with_error(-ret);
if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
ret = poll(fds, 1, POLL_TMOUT);
if (ret < 0)
exit_with_error(-ret);
}
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
}
for (i = 0; i < rcvd; i++) {
const struct xdp_desc *desc = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++);
u64 addr = desc->addr, orig;
orig = xsk_umem__extract_addr(addr);
addr = xsk_umem__add_offset_to_addr(addr);
if (!is_pkt_valid(pkt, xsk->umem->buffer, desc))
return;
*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = orig;
pkt = pkt_stream_get_pkt(pkt_stream, pkt_count++);
}
xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
xsk_ring_cons__release(&xsk->rx, rcvd);
}
}
static u32 __send_pkts(struct ifobject *ifobject, u32 pkt_nb)
{
struct xsk_socket_info *xsk = ifobject->xsk;
u32 i, idx;
while (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) < BATCH_SIZE)
complete_pkts(xsk, BATCH_SIZE);
for (i = 0; i < BATCH_SIZE; i++) {
struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, idx + i);
struct pkt *pkt = pkt_generate(ifobject, pkt_nb);
if (!pkt)
break;
tx_desc->addr = pkt->addr;
tx_desc->len = pkt->len;
pkt_nb++;
}
xsk_ring_prod__submit(&xsk->tx, i);
if (stat_test_type != STAT_TEST_TX_INVALID)
xsk->outstanding_tx += i;
else if (xsk_ring_prod__needs_wakeup(&xsk->tx))
kick_tx(xsk);
complete_pkts(xsk, i);
return i;
}
static void wait_for_tx_completion(struct xsk_socket_info *xsk)
{
while (xsk->outstanding_tx)
complete_pkts(xsk, BATCH_SIZE);
}
static void send_pkts(struct ifobject *ifobject)
{
struct pollfd fds[MAX_SOCKS] = { };
u32 pkt_cnt = 0;
fds[0].fd = xsk_socket__fd(ifobject->xsk->xsk);
fds[0].events = POLLOUT;
while (pkt_cnt < ifobject->pkt_stream->nb_pkts) {
u32 sent;
if (test_type == TEST_TYPE_POLL) {
int ret;
ret = poll(fds, 1, POLL_TMOUT);
if (ret <= 0)
continue;
if (!(fds[0].revents & POLLOUT))
continue;
}
sent = __send_pkts(ifobject, pkt_cnt);
pkt_cnt += sent;
usleep(10);
}
wait_for_tx_completion(ifobject->xsk);
}
static bool rx_stats_are_valid(struct ifobject *ifobject)
{
u32 xsk_stat = 0, expected_stat = ifobject->pkt_stream->nb_pkts;
struct xsk_socket *xsk = ifobject->xsk->xsk;
int fd = xsk_socket__fd(xsk);
struct xdp_statistics stats;
socklen_t optlen;
int err;
optlen = sizeof(stats);
err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
if (err) {
ksft_test_result_fail("ERROR: [%s] getsockopt(XDP_STATISTICS) error %u %s\n",
__func__, -err, strerror(-err));
return true;
}
if (optlen == sizeof(struct xdp_statistics)) {
switch (stat_test_type) {
case STAT_TEST_RX_DROPPED:
xsk_stat = stats.rx_dropped;
break;
case STAT_TEST_TX_INVALID:
return true;
case STAT_TEST_RX_FULL:
xsk_stat = stats.rx_ring_full;
expected_stat -= RX_FULL_RXQSIZE;
break;
case STAT_TEST_RX_FILL_EMPTY:
xsk_stat = stats.rx_fill_ring_empty_descs;
break;
default:
break;
}
if (xsk_stat == expected_stat)
return true;
}
return false;
}
static void tx_stats_validate(struct ifobject *ifobject)
{
struct xsk_socket *xsk = ifobject->xsk->xsk;
int fd = xsk_socket__fd(xsk);
struct xdp_statistics stats;
socklen_t optlen;
int err;
optlen = sizeof(stats);
err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
if (err) {
ksft_test_result_fail("ERROR: [%s] getsockopt(XDP_STATISTICS) error %u %s\n",
__func__, -err, strerror(-err));
return;
}
if (stats.tx_invalid_descs == ifobject->pkt_stream->nb_pkts)
return;
ksft_test_result_fail("ERROR: [%s] tx_invalid_descs incorrect. Got [%u] expected [%u]\n",
__func__, stats.tx_invalid_descs, ifobject->pkt_stream->nb_pkts);
}
static void thread_common_ops(struct ifobject *ifobject, void *bufs)
{
u64 umem_sz = num_frames * XSK_UMEM__DEFAULT_FRAME_SIZE;
int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
size_t mmap_sz = umem_sz;
int ctr = 0;
int ret;
ifobject->ns_fd = switch_namespace(ifobject->nsname);
if (test_type == TEST_TYPE_BPF_RES)
mmap_sz *= 2;
bufs = mmap(NULL, mmap_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
if (bufs == MAP_FAILED)
exit_with_error(errno);
while (ctr++ < SOCK_RECONF_CTR) {
xsk_configure_umem(ifobject, bufs, umem_sz, 0);
ifobject->umem = ifobject->umem_arr[0];
ret = xsk_configure_socket(ifobject, 0);
if (!ret)
break;
/* Retry Create Socket if it fails as xsk_socket__create() is asynchronous */
usleep(USLEEP_MAX);
if (ctr >= SOCK_RECONF_CTR)
exit_with_error(-ret);
}
ifobject->umem = ifobject->umem_arr[0];
ifobject->xsk = ifobject->xsk_arr[0];
if (test_type == TEST_TYPE_BPF_RES) {
xsk_configure_umem(ifobject, (u8 *)bufs + umem_sz, umem_sz, 1);
ifobject->umem = ifobject->umem_arr[1];
ret = xsk_configure_socket(ifobject, 1);
}
ifobject->umem = ifobject->umem_arr[0];
ifobject->xsk = ifobject->xsk_arr[0];
print_verbose("Interface [%s] vector [%s]\n",
ifobject->ifname, ifobject->fv.vector == tx ? "Tx" : "Rx");
}
static bool testapp_is_test_two_stepped(void)
{
return (test_type != TEST_TYPE_BIDI && test_type != TEST_TYPE_BPF_RES) || second_step;
}
static void testapp_cleanup_xsk_res(struct ifobject *ifobj)
{
if (testapp_is_test_two_stepped()) {
xsk_socket__delete(ifobj->xsk->xsk);
(void)xsk_umem__delete(ifobj->umem->umem);
}
}
static void *worker_testapp_validate_tx(void *arg)
{
struct ifobject *ifobject = (struct ifobject *)arg;
void *bufs = NULL;
if (!second_step)
thread_common_ops(ifobject, bufs);
print_verbose("Sending %d packets on interface %s\n", ifobject->pkt_stream->nb_pkts,
ifobject->ifname);
send_pkts(ifobject);
if (stat_test_type == STAT_TEST_TX_INVALID)
tx_stats_validate(ifobject);
testapp_cleanup_xsk_res(ifobject);
pthread_exit(NULL);
}
static void *worker_testapp_validate_rx(void *arg)
{
struct ifobject *ifobject = (struct ifobject *)arg;
struct pollfd fds[MAX_SOCKS] = { };
void *bufs = NULL;
if (!second_step)
thread_common_ops(ifobject, bufs);
if (stat_test_type != STAT_TEST_RX_FILL_EMPTY)
xsk_populate_fill_ring(ifobject->umem);
fds[0].fd = xsk_socket__fd(ifobject->xsk->xsk);
fds[0].events = POLLIN;
pthread_barrier_wait(&barr);
if (test_type == TEST_TYPE_STATS)
while (!rx_stats_are_valid(ifobject))
continue;
else
receive_pkts(ifobject->pkt_stream, ifobject->xsk, fds);
if (test_type == TEST_TYPE_TEARDOWN)
print_verbose("Destroying socket\n");
testapp_cleanup_xsk_res(ifobject);
pthread_exit(NULL);
}
static void testapp_validate(void)
{
bool bidi = test_type == TEST_TYPE_BIDI;
bool bpf = test_type == TEST_TYPE_BPF_RES;
struct pkt_stream *pkt_stream;
if (pthread_barrier_init(&barr, NULL, 2))
exit_with_error(errno);
if (stat_test_type == STAT_TEST_TX_INVALID)
pkt_stream = pkt_stream_generate(DEFAULT_PKT_CNT, XSK_UMEM__INVALID_FRAME_SIZE);
else
pkt_stream = pkt_stream_generate(DEFAULT_PKT_CNT, PKT_SIZE);
ifdict_tx->pkt_stream = pkt_stream;
ifdict_rx->pkt_stream = pkt_stream;
/*Spawn RX thread */
pthread_create(&t0, NULL, ifdict_rx->func_ptr, ifdict_rx);
pthread_barrier_wait(&barr);
if (pthread_barrier_destroy(&barr))
exit_with_error(errno);
/*Spawn TX thread */
pthread_create(&t1, NULL, ifdict_tx->func_ptr, ifdict_tx);
pthread_join(t1, NULL);
pthread_join(t0, NULL);
if (!(test_type == TEST_TYPE_TEARDOWN) && !bidi && !bpf && !(test_type == TEST_TYPE_STATS))
print_ksft_result();
}
static void testapp_teardown(void)
{
int i;
for (i = 0; i < MAX_TEARDOWN_ITER; i++) {
print_verbose("Creating socket\n");
testapp_validate();
}
print_ksft_result();
}
static void swap_vectors(struct ifobject *ifobj1, struct ifobject *ifobj2)
{
void *(*tmp_func_ptr)(void *) = ifobj1->func_ptr;
enum fvector tmp_vector = ifobj1->fv.vector;
ifobj1->func_ptr = ifobj2->func_ptr;
ifobj1->fv.vector = ifobj2->fv.vector;
ifobj2->func_ptr = tmp_func_ptr;
ifobj2->fv.vector = tmp_vector;
ifdict_tx = ifobj1;
ifdict_rx = ifobj2;
}
static void testapp_bidi(void)
{
for (int i = 0; i < MAX_BIDI_ITER; i++) {
print_verbose("Creating socket\n");
testapp_validate();
if (!second_step) {
print_verbose("Switching Tx/Rx vectors\n");
swap_vectors(ifdict[1], ifdict[0]);
}
second_step = true;
}
swap_vectors(ifdict[0], ifdict[1]);
print_ksft_result();
}
static void swap_xsk_res(void)
{
xsk_socket__delete(ifdict_tx->xsk->xsk);
xsk_umem__delete(ifdict_tx->umem->umem);
xsk_socket__delete(ifdict_rx->xsk->xsk);
xsk_umem__delete(ifdict_rx->umem->umem);
ifdict_tx->umem = ifdict_tx->umem_arr[1];
ifdict_tx->xsk = ifdict_tx->xsk_arr[1];
ifdict_rx->umem = ifdict_rx->umem_arr[1];
ifdict_rx->xsk = ifdict_rx->xsk_arr[1];
}
static void testapp_bpf_res(void)
{
int i;
for (i = 0; i < MAX_BPF_ITER; i++) {
print_verbose("Creating socket\n");
testapp_validate();
if (!second_step)
swap_xsk_res();
second_step = true;
}
print_ksft_result();
}
static void testapp_stats(void)
{
for (int i = 0; i < STAT_TEST_TYPE_MAX; i++) {
stat_test_type = i;
/* reset defaults */
rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM;
switch (stat_test_type) {
case STAT_TEST_RX_DROPPED:
frame_headroom = XSK_UMEM__DEFAULT_FRAME_SIZE -
XDP_PACKET_HEADROOM - 1;
break;
case STAT_TEST_RX_FULL:
rxqsize = RX_FULL_RXQSIZE;
break;
case STAT_TEST_TX_INVALID:
continue;
default:
break;
}
testapp_validate();
}
print_ksft_result();
}
static void init_iface(struct ifobject *ifobj, const char *dst_mac,
const char *src_mac, const char *dst_ip,
const char *src_ip, const u16 dst_port,
const u16 src_port, enum fvector vector)
{
struct in_addr ip;
memcpy(ifobj->dst_mac, dst_mac, ETH_ALEN);
memcpy(ifobj->src_mac, src_mac, ETH_ALEN);
inet_aton(dst_ip, &ip);
ifobj->dst_ip = ip.s_addr;
inet_aton(src_ip, &ip);
ifobj->src_ip = ip.s_addr;
ifobj->dst_port = dst_port;
ifobj->src_port = src_port;
if (vector == tx) {
ifobj->fv.vector = tx;
ifobj->func_ptr = worker_testapp_validate_tx;
ifdict_tx = ifobj;
} else {
ifobj->fv.vector = rx;
ifobj->func_ptr = worker_testapp_validate_rx;
ifdict_rx = ifobj;
}
}
static void run_pkt_test(int mode, int type)
{
test_type = type;
/* reset defaults after potential previous test */
xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
second_step = 0;
stat_test_type = -1;
rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM;
configured_mode = mode;
switch (mode) {
case (TEST_MODE_SKB):
xdp_flags |= XDP_FLAGS_SKB_MODE;
break;
case (TEST_MODE_DRV):
xdp_flags |= XDP_FLAGS_DRV_MODE;
break;
default:
break;
}
switch (test_type) {
case TEST_TYPE_STATS:
testapp_stats();
break;
case TEST_TYPE_TEARDOWN:
testapp_teardown();
break;
case TEST_TYPE_BIDI:
testapp_bidi();
break;
case TEST_TYPE_BPF_RES:
testapp_bpf_res();
break;
default:
testapp_validate();
break;
}
}
static struct ifobject *ifobject_create(void)
{
struct ifobject *ifobj;
ifobj = calloc(1, sizeof(struct ifobject));
if (!ifobj)
return NULL;
ifobj->xsk_arr = calloc(2, sizeof(struct xsk_socket_info *));
if (!ifobj->xsk_arr)
goto out_xsk_arr;
ifobj->umem_arr = calloc(2, sizeof(struct xsk_umem_info *));
if (!ifobj->umem_arr)
goto out_umem_arr;
return ifobj;
out_umem_arr:
free(ifobj->xsk_arr);
out_xsk_arr:
free(ifobj);
return NULL;
}
static void ifobject_delete(struct ifobject *ifobj)
{
free(ifobj->umem_arr);
free(ifobj->xsk_arr);
free(ifobj);
}
int main(int argc, char **argv)
{
struct rlimit _rlim = { RLIM_INFINITY, RLIM_INFINITY };
int i, j;
if (setrlimit(RLIMIT_MEMLOCK, &_rlim))
exit_with_error(errno);
for (i = 0; i < MAX_INTERFACES; i++) {
ifdict[i] = ifobject_create();
if (!ifdict[i])
exit_with_error(ENOMEM);
}
setlocale(LC_ALL, "");
parse_command_line(argc, argv);
init_iface(ifdict[tx], MAC1, MAC2, IP1, IP2, UDP_PORT1, UDP_PORT2, tx);
init_iface(ifdict[rx], MAC2, MAC1, IP2, IP1, UDP_PORT2, UDP_PORT1, rx);
ksft_set_plan(TEST_MODE_MAX * TEST_TYPE_MAX);
for (i = 0; i < TEST_MODE_MAX; i++)
for (j = 0; j < TEST_TYPE_MAX; j++) {
run_pkt_test(i, j);
usleep(USLEEP_MAX);
}
for (i = 0; i < MAX_INTERFACES; i++)
ifobject_delete(ifdict[i]);
ksft_exit_pass();
return 0;
}
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