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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/tools/testing/selftests/bpf/xskxceiver.c

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54 KiB
C
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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 in run-to-completion mode
* 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
* g. unaligned mode
* h. tests for invalid and corner case Tx descriptors so that the correct ones
* are discarded and let through, respectively.
* i. 2K frame size tests
*
* Total tests: 12
*
* Flow:
* -----
* - Single process spawns two threads: Tx and Rx
* - Each of these two threads attach to a veth interface
* - Each thread creates one AF_XDP socket connected to a unique umem for each
* veth interface
* - Tx thread Transmits a number of packets from veth<xxxx> to veth<yyyy>
* - Rx thread verifies if all 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 <assert.h>
#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/mman.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/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <time.h>
#include <unistd.h>
#include <stdatomic.h>
#include "xsk_xdp_progs.skel.h"
#include "xsk.h"
#include "xskxceiver.h"
#include <bpf/bpf.h>
#include <linux/filter.h>
#include "../kselftest.h"
#include "xsk_xdp_metadata.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)
{
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 busy_poll_string(test) (test)->ifobj_tx->busy_poll ? "BUSY-POLL " : ""
static char *mode_string(struct test_spec *test)
{
switch (test->mode) {
case TEST_MODE_SKB:
return "SKB";
case TEST_MODE_DRV:
return "DRV";
case TEST_MODE_ZC:
return "ZC";
default:
return "BOGUS";
}
}
static void report_failure(struct test_spec *test)
{
if (test->fail)
return;
ksft_test_result_fail("FAIL: %s %s%s\n", mode_string(test), busy_poll_string(test),
test->name);
test->fail = true;
}
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 bool is_umem_valid(struct ifobject *ifobj)
{
return !!ifobj->umem->umem;
}
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 u32 mode_to_xdp_flags(enum test_mode mode)
{
return (mode == TEST_MODE_SKB) ? XDP_FLAGS_SKB_MODE : XDP_FLAGS_DRV_MODE;
}
static int xsk_configure_umem(struct xsk_umem_info *umem, void *buffer, u64 size)
{
struct xsk_umem_config cfg = {
.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
.frame_size = umem->frame_size,
.frame_headroom = umem->frame_headroom,
.flags = XSK_UMEM__DEFAULT_FLAGS
};
int ret;
if (umem->unaligned_mode)
cfg.flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;
ret = xsk_umem__create(&umem->umem, buffer, size,
&umem->fq, &umem->cq, &cfg);
if (ret)
return ret;
umem->buffer = buffer;
return 0;
}
static void enable_busy_poll(struct xsk_socket_info *xsk)
{
int sock_opt;
sock_opt = 1;
if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_PREFER_BUSY_POLL,
(void *)&sock_opt, sizeof(sock_opt)) < 0)
exit_with_error(errno);
sock_opt = 20;
if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL,
(void *)&sock_opt, sizeof(sock_opt)) < 0)
exit_with_error(errno);
sock_opt = BATCH_SIZE;
if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL_BUDGET,
(void *)&sock_opt, sizeof(sock_opt)) < 0)
exit_with_error(errno);
}
static int __xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_info *umem,
struct ifobject *ifobject, bool shared)
{
struct xsk_socket_config cfg = {};
struct xsk_ring_cons *rxr;
struct xsk_ring_prod *txr;
xsk->umem = umem;
cfg.rx_size = xsk->rxqsize;
cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
cfg.bind_flags = ifobject->bind_flags;
if (shared)
cfg.bind_flags |= XDP_SHARED_UMEM;
txr = ifobject->tx_on ? &xsk->tx : NULL;
rxr = ifobject->rx_on ? &xsk->rx : NULL;
return xsk_socket__create(&xsk->xsk, ifobject->ifindex, 0, umem->umem, rxr, txr, &cfg);
}
static bool ifobj_zc_avail(struct ifobject *ifobject)
{
size_t umem_sz = DEFAULT_UMEM_BUFFERS * XSK_UMEM__DEFAULT_FRAME_SIZE;
int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
struct xsk_socket_info *xsk;
struct xsk_umem_info *umem;
bool zc_avail = false;
void *bufs;
int ret;
bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
if (bufs == MAP_FAILED)
exit_with_error(errno);
umem = calloc(1, sizeof(struct xsk_umem_info));
if (!umem) {
munmap(bufs, umem_sz);
exit_with_error(ENOMEM);
}
umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
ret = xsk_configure_umem(umem, bufs, umem_sz);
if (ret)
exit_with_error(-ret);
xsk = calloc(1, sizeof(struct xsk_socket_info));
if (!xsk)
goto out;
ifobject->bind_flags = XDP_USE_NEED_WAKEUP | XDP_ZEROCOPY;
ifobject->rx_on = true;
xsk->rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
ret = __xsk_configure_socket(xsk, umem, ifobject, false);
if (!ret)
zc_avail = true;
xsk_socket__delete(xsk->xsk);
free(xsk);
out:
munmap(umem->buffer, umem_sz);
xsk_umem__delete(umem->umem);
free(umem);
return zc_avail;
}
static struct option long_options[] = {
{"interface", required_argument, 0, 'i'},
{"busy-poll", no_argument, 0, 'b'},
{"dump-pkts", no_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"
" -D, --dump-pkts Dump packets L2 - L5\n"
" -v, --verbose Verbose output\n"
" -b, --busy-poll Enable busy poll\n";
ksft_print_msg(str, prog);
}
static bool validate_interface(struct ifobject *ifobj)
{
if (!strcmp(ifobj->ifname, ""))
return false;
return true;
}
static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx, int argc,
char **argv)
{
struct ifobject *ifobj;
u32 interface_nb = 0;
int option_index, c;
opterr = 0;
for (;;) {
c = getopt_long(argc, argv, "i:Dvb", long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'i':
if (interface_nb == 0)
ifobj = ifobj_tx;
else if (interface_nb == 1)
ifobj = ifobj_rx;
else
break;
memcpy(ifobj->ifname, optarg,
min_t(size_t, MAX_INTERFACE_NAME_CHARS, strlen(optarg)));
ifobj->ifindex = if_nametoindex(ifobj->ifname);
if (!ifobj->ifindex)
exit_with_error(errno);
interface_nb++;
break;
case 'D':
opt_pkt_dump = true;
break;
case 'v':
opt_verbose = true;
break;
case 'b':
ifobj_tx->busy_poll = true;
ifobj_rx->busy_poll = true;
break;
default:
usage(basename(argv[0]));
ksft_exit_xfail();
}
}
}
static void __test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx,
struct ifobject *ifobj_rx)
{
u32 i, j;
for (i = 0; i < MAX_INTERFACES; i++) {
struct ifobject *ifobj = i ? ifobj_rx : ifobj_tx;
ifobj->xsk = &ifobj->xsk_arr[0];
ifobj->use_poll = false;
ifobj->use_fill_ring = true;
ifobj->release_rx = true;
ifobj->validation_func = NULL;
ifobj->use_metadata = false;
if (i == 0) {
ifobj->rx_on = false;
ifobj->tx_on = true;
ifobj->pkt_stream = test->tx_pkt_stream_default;
} else {
ifobj->rx_on = true;
ifobj->tx_on = false;
ifobj->pkt_stream = test->rx_pkt_stream_default;
}
memset(ifobj->umem, 0, sizeof(*ifobj->umem));
ifobj->umem->num_frames = DEFAULT_UMEM_BUFFERS;
ifobj->umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
if (ifobj->shared_umem && ifobj->rx_on)
ifobj->umem->base_addr = DEFAULT_UMEM_BUFFERS *
XSK_UMEM__DEFAULT_FRAME_SIZE;
for (j = 0; j < MAX_SOCKETS; j++) {
memset(&ifobj->xsk_arr[j], 0, sizeof(ifobj->xsk_arr[j]));
ifobj->xsk_arr[j].rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
}
}
test->ifobj_tx = ifobj_tx;
test->ifobj_rx = ifobj_rx;
test->current_step = 0;
test->total_steps = 1;
test->nb_sockets = 1;
test->fail = false;
test->xdp_prog_rx = ifobj_rx->xdp_progs->progs.xsk_def_prog;
test->xskmap_rx = ifobj_rx->xdp_progs->maps.xsk;
test->xdp_prog_tx = ifobj_tx->xdp_progs->progs.xsk_def_prog;
test->xskmap_tx = ifobj_tx->xdp_progs->maps.xsk;
}
static void test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx,
struct ifobject *ifobj_rx, enum test_mode mode)
{
struct pkt_stream *tx_pkt_stream;
struct pkt_stream *rx_pkt_stream;
u32 i;
tx_pkt_stream = test->tx_pkt_stream_default;
rx_pkt_stream = test->rx_pkt_stream_default;
memset(test, 0, sizeof(*test));
test->tx_pkt_stream_default = tx_pkt_stream;
test->rx_pkt_stream_default = rx_pkt_stream;
for (i = 0; i < MAX_INTERFACES; i++) {
struct ifobject *ifobj = i ? ifobj_rx : ifobj_tx;
ifobj->bind_flags = XDP_USE_NEED_WAKEUP;
if (mode == TEST_MODE_ZC)
ifobj->bind_flags |= XDP_ZEROCOPY;
else
ifobj->bind_flags |= XDP_COPY;
}
test->mode = mode;
__test_spec_init(test, ifobj_tx, ifobj_rx);
}
static void test_spec_reset(struct test_spec *test)
{
__test_spec_init(test, test->ifobj_tx, test->ifobj_rx);
}
static void test_spec_set_name(struct test_spec *test, const char *name)
{
strncpy(test->name, name, MAX_TEST_NAME_SIZE);
}
static void test_spec_set_xdp_prog(struct test_spec *test, struct bpf_program *xdp_prog_rx,
struct bpf_program *xdp_prog_tx, struct bpf_map *xskmap_rx,
struct bpf_map *xskmap_tx)
{
test->xdp_prog_rx = xdp_prog_rx;
test->xdp_prog_tx = xdp_prog_tx;
test->xskmap_rx = xskmap_rx;
test->xskmap_tx = xskmap_tx;
}
static void pkt_stream_reset(struct pkt_stream *pkt_stream)
{
if (pkt_stream)
pkt_stream->rx_pkt_nb = 0;
}
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 *pkt_stream_get_next_rx_pkt(struct pkt_stream *pkt_stream, u32 *pkts_sent)
{
while (pkt_stream->rx_pkt_nb < pkt_stream->nb_pkts) {
(*pkts_sent)++;
if (pkt_stream->pkts[pkt_stream->rx_pkt_nb].valid)
return &pkt_stream->pkts[pkt_stream->rx_pkt_nb++];
pkt_stream->rx_pkt_nb++;
}
return NULL;
}
static void pkt_stream_delete(struct pkt_stream *pkt_stream)
{
free(pkt_stream->pkts);
free(pkt_stream);
}
static void pkt_stream_restore_default(struct test_spec *test)
{
struct pkt_stream *tx_pkt_stream = test->ifobj_tx->pkt_stream;
struct pkt_stream *rx_pkt_stream = test->ifobj_rx->pkt_stream;
if (tx_pkt_stream != test->tx_pkt_stream_default) {
pkt_stream_delete(test->ifobj_tx->pkt_stream);
test->ifobj_tx->pkt_stream = test->tx_pkt_stream_default;
}
if (rx_pkt_stream != test->rx_pkt_stream_default) {
pkt_stream_delete(test->ifobj_rx->pkt_stream);
test->ifobj_rx->pkt_stream = test->rx_pkt_stream_default;
}
}
static struct pkt_stream *__pkt_stream_alloc(u32 nb_pkts)
{
struct pkt_stream *pkt_stream;
pkt_stream = calloc(1, sizeof(*pkt_stream));
if (!pkt_stream)
return NULL;
pkt_stream->pkts = calloc(nb_pkts, sizeof(*pkt_stream->pkts));
if (!pkt_stream->pkts) {
free(pkt_stream);
return NULL;
}
pkt_stream->nb_pkts = nb_pkts;
return pkt_stream;
}
static void pkt_set(struct xsk_umem_info *umem, struct pkt *pkt, u64 addr, u32 len)
{
pkt->addr = addr + umem->base_addr;
pkt->len = len;
if (len > umem->frame_size - XDP_PACKET_HEADROOM - MIN_PKT_SIZE * 2 - umem->frame_headroom)
pkt->valid = false;
else
pkt->valid = true;
}
static struct pkt_stream *pkt_stream_generate(struct xsk_umem_info *umem, u32 nb_pkts, u32 pkt_len)
{
struct pkt_stream *pkt_stream;
u32 i;
pkt_stream = __pkt_stream_alloc(nb_pkts);
if (!pkt_stream)
exit_with_error(ENOMEM);
for (i = 0; i < nb_pkts; i++) {
pkt_set(umem, &pkt_stream->pkts[i], (i % umem->num_frames) * umem->frame_size,
pkt_len);
pkt_stream->pkts[i].payload = i;
}
return pkt_stream;
}
static struct pkt_stream *pkt_stream_clone(struct xsk_umem_info *umem,
struct pkt_stream *pkt_stream)
{
return pkt_stream_generate(umem, pkt_stream->nb_pkts, pkt_stream->pkts[0].len);
}
static void pkt_stream_replace(struct test_spec *test, u32 nb_pkts, u32 pkt_len)
{
struct pkt_stream *pkt_stream;
pkt_stream = pkt_stream_generate(test->ifobj_tx->umem, nb_pkts, pkt_len);
test->ifobj_tx->pkt_stream = pkt_stream;
pkt_stream = pkt_stream_generate(test->ifobj_rx->umem, nb_pkts, pkt_len);
test->ifobj_rx->pkt_stream = pkt_stream;
}
static void __pkt_stream_replace_half(struct ifobject *ifobj, u32 pkt_len,
int offset)
{
struct xsk_umem_info *umem = ifobj->umem;
struct pkt_stream *pkt_stream;
u32 i;
pkt_stream = pkt_stream_clone(umem, ifobj->pkt_stream);
for (i = 1; i < ifobj->pkt_stream->nb_pkts; i += 2)
pkt_set(umem, &pkt_stream->pkts[i],
(i % umem->num_frames) * umem->frame_size + offset, pkt_len);
ifobj->pkt_stream = pkt_stream;
}
static void pkt_stream_replace_half(struct test_spec *test, u32 pkt_len, int offset)
{
__pkt_stream_replace_half(test->ifobj_tx, pkt_len, offset);
__pkt_stream_replace_half(test->ifobj_rx, pkt_len, offset);
}
static void pkt_stream_receive_half(struct test_spec *test)
{
struct xsk_umem_info *umem = test->ifobj_rx->umem;
struct pkt_stream *pkt_stream = test->ifobj_tx->pkt_stream;
u32 i;
test->ifobj_rx->pkt_stream = pkt_stream_generate(umem, pkt_stream->nb_pkts,
pkt_stream->pkts[0].len);
pkt_stream = test->ifobj_rx->pkt_stream;
for (i = 1; i < pkt_stream->nb_pkts; i += 2)
pkt_stream->pkts[i].valid = false;
}
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;
if (!pkt->valid || pkt->len < MIN_PKT_SIZE)
return pkt;
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_stream_generate_custom(struct ifobject *ifobj,
struct pkt *pkts, u32 nb_pkts)
{
struct pkt_stream *pkt_stream;
u32 i;
pkt_stream = __pkt_stream_alloc(nb_pkts);
if (!pkt_stream)
exit_with_error(ENOMEM);
for (i = 0; i < nb_pkts; i++) {
pkt_stream->pkts[i].addr = pkts[i].addr + ifobj->umem->base_addr;
pkt_stream->pkts[i].len = pkts[i].len;
pkt_stream->pkts[i].payload = i;
pkt_stream->pkts[i].valid = pkts[i].valid;
}
ifobj->pkt_stream = pkt_stream;
}
static void pkt_stream_generate_custom(struct test_spec *test, struct pkt *pkts, u32 nb_pkts)
{
__pkt_stream_generate_custom(test->ifobj_tx, pkts, nb_pkts);
__pkt_stream_generate_custom(test->ifobj_rx, pkts, nb_pkts);
}
static void pkt_dump(void *pkt, u32 len)
{
char s[INET_ADDRSTRLEN];
struct ethhdr *ethhdr;
struct udphdr *udphdr;
struct iphdr *iphdr;
u32 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 = ntohl(*((u32 *)(pkt + PKT_HDR_SIZE)));
fprintf(stdout, "DEBUG>> L5: payload: %d\n", payload);
fprintf(stdout, "---------------------------------------\n");
}
static bool is_offset_correct(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream, u64 addr,
u64 pkt_stream_addr)
{
u32 headroom = umem->unaligned_mode ? 0 : umem->frame_headroom;
u32 offset = addr % umem->frame_size, expected_offset = 0;
if (!pkt_stream->use_addr_for_fill)
pkt_stream_addr = 0;
expected_offset += (pkt_stream_addr + headroom + XDP_PACKET_HEADROOM) % umem->frame_size;
if (offset == expected_offset)
return true;
ksft_print_msg("[%s] expected [%u], got [%u]\n", __func__, expected_offset, offset);
return false;
}
static bool is_metadata_correct(struct pkt *pkt, void *buffer, u64 addr)
{
void *data = xsk_umem__get_data(buffer, addr);
struct xdp_info *meta = data - sizeof(struct xdp_info);
if (meta->count != pkt->payload) {
ksft_print_msg("[%s] expected meta_count [%d], got meta_count [%d]\n",
__func__, pkt->payload, meta->count);
return false;
}
return true;
}
static bool is_pkt_valid(struct pkt *pkt, void *buffer, u64 addr, u32 len)
{
void *data = xsk_umem__get_data(buffer, addr);
struct iphdr *iphdr = (struct iphdr *)(data + sizeof(struct ethhdr));
if (!pkt) {
ksft_print_msg("[%s] too many packets received\n", __func__);
return false;
}
if (len < MIN_PKT_SIZE || pkt->len < MIN_PKT_SIZE) {
/* Do not try to verify packets that are smaller than minimum size. */
return true;
}
if (pkt->len != len) {
ksft_print_msg("[%s] expected length [%d], got length [%d]\n",
__func__, pkt->len, len);
return false;
}
if (iphdr->version == IP_PKT_VER && iphdr->tos == IP_PKT_TOS) {
u32 seqnum = ntohl(*((u32 *)(data + PKT_HDR_SIZE)));
if (opt_pkt_dump)
pkt_dump(data, PKT_SIZE);
if (pkt->payload != seqnum) {
ksft_print_msg("[%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)
return;
if (errno == ENOBUFS || errno == EAGAIN || errno == EBUSY || errno == ENETDOWN) {
usleep(100);
return;
}
exit_with_error(errno);
}
static void kick_rx(struct xsk_socket_info *xsk)
{
int ret;
ret = recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL);
if (ret < 0)
exit_with_error(errno);
}
static int complete_pkts(struct xsk_socket_info *xsk, int batch_size)
{
unsigned int rcvd;
u32 idx;
if (xsk_ring_prod__needs_wakeup(&xsk->tx))
kick_tx(xsk);
rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
if (rcvd) {
if (rcvd > xsk->outstanding_tx) {
u64 addr = *xsk_ring_cons__comp_addr(&xsk->umem->cq, idx + rcvd - 1);
ksft_print_msg("[%s] Too many packets completed\n", __func__);
ksft_print_msg("Last completion address: %llx\n", addr);
return TEST_FAILURE;
}
xsk_ring_cons__release(&xsk->umem->cq, rcvd);
xsk->outstanding_tx -= rcvd;
}
return TEST_PASS;
}
static int receive_pkts(struct test_spec *test, struct pollfd *fds)
{
struct timeval tv_end, tv_now, tv_timeout = {THREAD_TMOUT, 0};
struct pkt_stream *pkt_stream = test->ifobj_rx->pkt_stream;
u32 idx_rx = 0, idx_fq = 0, rcvd, i, pkts_sent = 0;
struct xsk_socket_info *xsk = test->ifobj_rx->xsk;
struct ifobject *ifobj = test->ifobj_rx;
struct xsk_umem_info *umem = xsk->umem;
struct pkt *pkt;
int ret;
ret = gettimeofday(&tv_now, NULL);
if (ret)
exit_with_error(errno);
timeradd(&tv_now, &tv_timeout, &tv_end);
pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent);
while (pkt) {
ret = gettimeofday(&tv_now, NULL);
if (ret)
exit_with_error(errno);
if (timercmp(&tv_now, &tv_end, >)) {
ksft_print_msg("ERROR: [%s] Receive loop timed out\n", __func__);
return TEST_FAILURE;
}
kick_rx(xsk);
if (ifobj->use_poll) {
ret = poll(fds, 1, POLL_TMOUT);
if (ret < 0)
exit_with_error(errno);
if (!ret) {
if (!is_umem_valid(test->ifobj_tx))
return TEST_PASS;
ksft_print_msg("ERROR: [%s] Poll timed out\n", __func__);
return TEST_FAILURE;
}
if (!(fds->revents & POLLIN))
continue;
}
rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
if (!rcvd)
continue;
if (ifobj->use_fill_ring) {
ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
while (ret != rcvd) {
if (ret < 0)
exit_with_error(-ret);
if (xsk_ring_prod__needs_wakeup(&umem->fq)) {
ret = poll(fds, 1, POLL_TMOUT);
if (ret < 0)
exit_with_error(errno);
}
ret = xsk_ring_prod__reserve(&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, umem->buffer, addr, desc->len) ||
!is_offset_correct(umem, pkt_stream, addr, pkt->addr) ||
(ifobj->use_metadata && !is_metadata_correct(pkt, umem->buffer, addr)))
return TEST_FAILURE;
if (ifobj->use_fill_ring)
*xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) = orig;
pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent);
}
if (ifobj->use_fill_ring)
xsk_ring_prod__submit(&umem->fq, rcvd);
if (ifobj->release_rx)
xsk_ring_cons__release(&xsk->rx, rcvd);
pthread_mutex_lock(&pacing_mutex);
pkts_in_flight -= pkts_sent;
if (pkts_in_flight < umem->num_frames)
pthread_cond_signal(&pacing_cond);
pthread_mutex_unlock(&pacing_mutex);
pkts_sent = 0;
}
return TEST_PASS;
}
static int __send_pkts(struct ifobject *ifobject, u32 *pkt_nb, struct pollfd *fds,
bool timeout)
{
struct xsk_socket_info *xsk = ifobject->xsk;
bool use_poll = ifobject->use_poll;
u32 i, idx = 0, valid_pkts = 0;
int ret;
while (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) < BATCH_SIZE) {
if (use_poll) {
ret = poll(fds, 1, POLL_TMOUT);
if (timeout) {
if (ret < 0) {
ksft_print_msg("ERROR: [%s] Poll error %d\n",
__func__, errno);
return TEST_FAILURE;
}
if (ret == 0)
return TEST_PASS;
break;
}
if (ret <= 0) {
ksft_print_msg("ERROR: [%s] Poll error %d\n",
__func__, errno);
return TEST_FAILURE;
}
}
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)++;
if (pkt->valid)
valid_pkts++;
}
pthread_mutex_lock(&pacing_mutex);
pkts_in_flight += valid_pkts;
/* pkts_in_flight might be negative if many invalid packets are sent */
if (pkts_in_flight >= (int)(ifobject->umem->num_frames - BATCH_SIZE)) {
kick_tx(xsk);
pthread_cond_wait(&pacing_cond, &pacing_mutex);
}
pthread_mutex_unlock(&pacing_mutex);
xsk_ring_prod__submit(&xsk->tx, i);
xsk->outstanding_tx += valid_pkts;
if (use_poll) {
ret = poll(fds, 1, POLL_TMOUT);
if (ret <= 0) {
if (ret == 0 && timeout)
return TEST_PASS;
ksft_print_msg("ERROR: [%s] Poll error %d\n", __func__, ret);
return TEST_FAILURE;
}
}
if (!timeout) {
if (complete_pkts(xsk, i))
return TEST_FAILURE;
usleep(10);
return TEST_PASS;
}
return TEST_CONTINUE;
}
static void wait_for_tx_completion(struct xsk_socket_info *xsk)
{
while (xsk->outstanding_tx)
complete_pkts(xsk, BATCH_SIZE);
}
static int send_pkts(struct test_spec *test, struct ifobject *ifobject)
{
bool timeout = !is_umem_valid(test->ifobj_rx);
struct pollfd fds = { };
u32 pkt_cnt = 0, ret;
fds.fd = xsk_socket__fd(ifobject->xsk->xsk);
fds.events = POLLOUT;
while (pkt_cnt < ifobject->pkt_stream->nb_pkts) {
ret = __send_pkts(ifobject, &pkt_cnt, &fds, timeout);
if ((ret || test->fail) && !timeout)
return TEST_FAILURE;
else if (ret == TEST_PASS && timeout)
return ret;
}
wait_for_tx_completion(ifobject->xsk);
return TEST_PASS;
}
static int get_xsk_stats(struct xsk_socket *xsk, struct xdp_statistics *stats)
{
int fd = xsk_socket__fd(xsk), err;
socklen_t optlen, expected_len;
optlen = sizeof(*stats);
err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, stats, &optlen);
if (err) {
ksft_print_msg("[%s] getsockopt(XDP_STATISTICS) error %u %s\n",
__func__, -err, strerror(-err));
return TEST_FAILURE;
}
expected_len = sizeof(struct xdp_statistics);
if (optlen != expected_len) {
ksft_print_msg("[%s] getsockopt optlen error. Expected: %u got: %u\n",
__func__, expected_len, optlen);
return TEST_FAILURE;
}
return TEST_PASS;
}
static int validate_rx_dropped(struct ifobject *ifobject)
{
struct xsk_socket *xsk = ifobject->xsk->xsk;
struct xdp_statistics stats;
int err;
kick_rx(ifobject->xsk);
err = get_xsk_stats(xsk, &stats);
if (err)
return TEST_FAILURE;
/* The receiver calls getsockopt after receiving the last (valid)
* packet which is not the final packet sent in this test (valid and
* invalid packets are sent in alternating fashion with the final
* packet being invalid). Since the last packet may or may not have
* been dropped already, both outcomes must be allowed.
*/
if (stats.rx_dropped == ifobject->pkt_stream->nb_pkts / 2 ||
stats.rx_dropped == ifobject->pkt_stream->nb_pkts / 2 - 1)
return TEST_PASS;
return TEST_FAILURE;
}
static int validate_rx_full(struct ifobject *ifobject)
{
struct xsk_socket *xsk = ifobject->xsk->xsk;
struct xdp_statistics stats;
int err;
usleep(1000);
kick_rx(ifobject->xsk);
err = get_xsk_stats(xsk, &stats);
if (err)
return TEST_FAILURE;
if (stats.rx_ring_full)
return TEST_PASS;
return TEST_FAILURE;
}
static int validate_fill_empty(struct ifobject *ifobject)
{
struct xsk_socket *xsk = ifobject->xsk->xsk;
struct xdp_statistics stats;
int err;
usleep(1000);
kick_rx(ifobject->xsk);
err = get_xsk_stats(xsk, &stats);
if (err)
return TEST_FAILURE;
if (stats.rx_fill_ring_empty_descs)
return TEST_PASS;
return TEST_FAILURE;
}
static int validate_tx_invalid_descs(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_print_msg("[%s] getsockopt(XDP_STATISTICS) error %u %s\n",
__func__, -err, strerror(-err));
return TEST_FAILURE;
}
if (stats.tx_invalid_descs != ifobject->pkt_stream->nb_pkts / 2) {
ksft_print_msg("[%s] tx_invalid_descs incorrect. Got [%u] expected [%u]\n",
__func__, stats.tx_invalid_descs, ifobject->pkt_stream->nb_pkts);
return TEST_FAILURE;
}
return TEST_PASS;
}
static void xsk_configure_socket(struct test_spec *test, struct ifobject *ifobject,
struct xsk_umem_info *umem, bool tx)
{
int i, ret;
for (i = 0; i < test->nb_sockets; i++) {
bool shared = (ifobject->shared_umem && tx) ? true : !!i;
u32 ctr = 0;
while (ctr++ < SOCK_RECONF_CTR) {
ret = __xsk_configure_socket(&ifobject->xsk_arr[i], umem,
ifobject, shared);
if (!ret)
break;
/* Retry if it fails as xsk_socket__create() is asynchronous */
if (ctr >= SOCK_RECONF_CTR)
exit_with_error(-ret);
usleep(USLEEP_MAX);
}
if (ifobject->busy_poll)
enable_busy_poll(&ifobject->xsk_arr[i]);
}
}
static void thread_common_ops_tx(struct test_spec *test, struct ifobject *ifobject)
{
xsk_configure_socket(test, ifobject, test->ifobj_rx->umem, true);
ifobject->xsk = &ifobject->xsk_arr[0];
ifobject->xskmap = test->ifobj_rx->xskmap;
memcpy(ifobject->umem, test->ifobj_rx->umem, sizeof(struct xsk_umem_info));
}
static void xsk_populate_fill_ring(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream)
{
u32 idx = 0, i, buffers_to_fill;
int ret;
if (umem->num_frames < XSK_RING_PROD__DEFAULT_NUM_DESCS)
buffers_to_fill = umem->num_frames;
else
buffers_to_fill = XSK_RING_PROD__DEFAULT_NUM_DESCS;
ret = xsk_ring_prod__reserve(&umem->fq, buffers_to_fill, &idx);
if (ret != buffers_to_fill)
exit_with_error(ENOSPC);
for (i = 0; i < buffers_to_fill; i++) {
u64 addr;
if (pkt_stream->use_addr_for_fill) {
struct pkt *pkt = pkt_stream_get_pkt(pkt_stream, i);
if (!pkt)
break;
addr = pkt->addr;
} else {
addr = i * umem->frame_size;
}
*xsk_ring_prod__fill_addr(&umem->fq, idx++) = addr;
}
xsk_ring_prod__submit(&umem->fq, i);
}
static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject)
{
u64 umem_sz = ifobject->umem->num_frames * ifobject->umem->frame_size;
int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
LIBBPF_OPTS(bpf_xdp_query_opts, opts);
void *bufs;
int ret;
if (ifobject->umem->unaligned_mode)
mmap_flags |= MAP_HUGETLB | MAP_HUGE_2MB;
if (ifobject->shared_umem)
umem_sz *= 2;
bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
if (bufs == MAP_FAILED)
exit_with_error(errno);
ret = xsk_configure_umem(ifobject->umem, bufs, umem_sz);
if (ret)
exit_with_error(-ret);
xsk_populate_fill_ring(ifobject->umem, ifobject->pkt_stream);
xsk_configure_socket(test, ifobject, ifobject->umem, false);
ifobject->xsk = &ifobject->xsk_arr[0];
if (!ifobject->rx_on)
return;
ret = xsk_update_xskmap(ifobject->xskmap, ifobject->xsk->xsk);
if (ret)
exit_with_error(errno);
}
static void *worker_testapp_validate_tx(void *arg)
{
struct test_spec *test = (struct test_spec *)arg;
struct ifobject *ifobject = test->ifobj_tx;
int err;
if (test->current_step == 1) {
if (!ifobject->shared_umem)
thread_common_ops(test, ifobject);
else
thread_common_ops_tx(test, ifobject);
}
print_verbose("Sending %d packets on interface %s\n", ifobject->pkt_stream->nb_pkts,
ifobject->ifname);
err = send_pkts(test, ifobject);
if (!err && ifobject->validation_func)
err = ifobject->validation_func(ifobject);
if (err)
report_failure(test);
pthread_exit(NULL);
}
static void *worker_testapp_validate_rx(void *arg)
{
struct test_spec *test = (struct test_spec *)arg;
struct ifobject *ifobject = test->ifobj_rx;
struct pollfd fds = { };
int err;
if (test->current_step == 1) {
thread_common_ops(test, ifobject);
} else {
xsk_clear_xskmap(ifobject->xskmap);
err = xsk_update_xskmap(ifobject->xskmap, ifobject->xsk->xsk);
if (err) {
printf("Error: Failed to update xskmap, error %s\n", strerror(-err));
exit_with_error(-err);
}
}
fds.fd = xsk_socket__fd(ifobject->xsk->xsk);
fds.events = POLLIN;
pthread_barrier_wait(&barr);
err = receive_pkts(test, &fds);
if (!err && ifobject->validation_func)
err = ifobject->validation_func(ifobject);
if (err) {
report_failure(test);
pthread_mutex_lock(&pacing_mutex);
pthread_cond_signal(&pacing_cond);
pthread_mutex_unlock(&pacing_mutex);
}
pthread_exit(NULL);
}
static u64 ceil_u64(u64 a, u64 b)
{
return (a + b - 1) / b;
}
static void testapp_clean_xsk_umem(struct ifobject *ifobj)
{
u64 umem_sz = ifobj->umem->num_frames * ifobj->umem->frame_size;
if (ifobj->shared_umem)
umem_sz *= 2;
umem_sz = ceil_u64(umem_sz, HUGEPAGE_SIZE) * HUGEPAGE_SIZE;
xsk_umem__delete(ifobj->umem->umem);
munmap(ifobj->umem->buffer, umem_sz);
}
static void handler(int signum)
{
pthread_exit(NULL);
}
static bool xdp_prog_changed(struct test_spec *test, struct ifobject *ifobj)
{
return ifobj->xdp_prog != test->xdp_prog_rx || ifobj->mode != test->mode;
}
static void xsk_reattach_xdp(struct ifobject *ifobj, struct bpf_program *xdp_prog,
struct bpf_map *xskmap, enum test_mode mode)
{
int err;
xsk_detach_xdp_program(ifobj->ifindex, mode_to_xdp_flags(ifobj->mode));
err = xsk_attach_xdp_program(xdp_prog, ifobj->ifindex, mode_to_xdp_flags(mode));
if (err) {
printf("Error attaching XDP program\n");
exit_with_error(-err);
}
if (ifobj->mode != mode && (mode == TEST_MODE_DRV || mode == TEST_MODE_ZC))
if (!xsk_is_in_mode(ifobj->ifindex, XDP_FLAGS_DRV_MODE)) {
ksft_print_msg("ERROR: XDP prog not in DRV mode\n");
exit_with_error(EINVAL);
}
ifobj->xdp_prog = xdp_prog;
ifobj->xskmap = xskmap;
ifobj->mode = mode;
}
static void xsk_attach_xdp_progs(struct test_spec *test, struct ifobject *ifobj_rx,
struct ifobject *ifobj_tx)
{
if (xdp_prog_changed(test, ifobj_rx))
xsk_reattach_xdp(ifobj_rx, test->xdp_prog_rx, test->xskmap_rx, test->mode);
if (!ifobj_tx || ifobj_tx->shared_umem)
return;
if (xdp_prog_changed(test, ifobj_tx))
xsk_reattach_xdp(ifobj_tx, test->xdp_prog_tx, test->xskmap_tx, test->mode);
}
static int __testapp_validate_traffic(struct test_spec *test, struct ifobject *ifobj1,
struct ifobject *ifobj2)
{
pthread_t t0, t1;
if (ifobj2)
if (pthread_barrier_init(&barr, NULL, 2))
exit_with_error(errno);
test->current_step++;
pkt_stream_reset(ifobj1->pkt_stream);
pkts_in_flight = 0;
signal(SIGUSR1, handler);
/*Spawn RX thread */
pthread_create(&t0, NULL, ifobj1->func_ptr, test);
if (ifobj2) {
pthread_barrier_wait(&barr);
if (pthread_barrier_destroy(&barr))
exit_with_error(errno);
/*Spawn TX thread */
pthread_create(&t1, NULL, ifobj2->func_ptr, test);
pthread_join(t1, NULL);
}
if (!ifobj2)
pthread_kill(t0, SIGUSR1);
else
pthread_join(t0, NULL);
if (test->total_steps == test->current_step || test->fail) {
if (ifobj2)
xsk_socket__delete(ifobj2->xsk->xsk);
xsk_socket__delete(ifobj1->xsk->xsk);
testapp_clean_xsk_umem(ifobj1);
if (ifobj2 && !ifobj2->shared_umem)
testapp_clean_xsk_umem(ifobj2);
}
return !!test->fail;
}
static int testapp_validate_traffic(struct test_spec *test)
{
struct ifobject *ifobj_rx = test->ifobj_rx;
struct ifobject *ifobj_tx = test->ifobj_tx;
xsk_attach_xdp_progs(test, ifobj_rx, ifobj_tx);
return __testapp_validate_traffic(test, ifobj_rx, ifobj_tx);
}
static int testapp_validate_traffic_single_thread(struct test_spec *test, struct ifobject *ifobj)
{
return __testapp_validate_traffic(test, ifobj, NULL);
}
static void testapp_teardown(struct test_spec *test)
{
int i;
test_spec_set_name(test, "TEARDOWN");
for (i = 0; i < MAX_TEARDOWN_ITER; i++) {
if (testapp_validate_traffic(test))
return;
test_spec_reset(test);
}
}
static void swap_directions(struct ifobject **ifobj1, struct ifobject **ifobj2)
{
thread_func_t tmp_func_ptr = (*ifobj1)->func_ptr;
struct ifobject *tmp_ifobj = (*ifobj1);
(*ifobj1)->func_ptr = (*ifobj2)->func_ptr;
(*ifobj2)->func_ptr = tmp_func_ptr;
*ifobj1 = *ifobj2;
*ifobj2 = tmp_ifobj;
}
static void testapp_bidi(struct test_spec *test)
{
test_spec_set_name(test, "BIDIRECTIONAL");
test->ifobj_tx->rx_on = true;
test->ifobj_rx->tx_on = true;
test->total_steps = 2;
if (testapp_validate_traffic(test))
return;
print_verbose("Switching Tx/Rx vectors\n");
swap_directions(&test->ifobj_rx, &test->ifobj_tx);
__testapp_validate_traffic(test, test->ifobj_rx, test->ifobj_tx);
swap_directions(&test->ifobj_rx, &test->ifobj_tx);
}
static void swap_xsk_resources(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx)
{
int ret;
xsk_socket__delete(ifobj_tx->xsk->xsk);
xsk_socket__delete(ifobj_rx->xsk->xsk);
ifobj_tx->xsk = &ifobj_tx->xsk_arr[1];
ifobj_rx->xsk = &ifobj_rx->xsk_arr[1];
ret = xsk_update_xskmap(ifobj_rx->xskmap, ifobj_rx->xsk->xsk);
if (ret)
exit_with_error(errno);
}
static void testapp_bpf_res(struct test_spec *test)
{
test_spec_set_name(test, "BPF_RES");
test->total_steps = 2;
test->nb_sockets = 2;
if (testapp_validate_traffic(test))
return;
swap_xsk_resources(test->ifobj_tx, test->ifobj_rx);
testapp_validate_traffic(test);
}
static void testapp_headroom(struct test_spec *test)
{
test_spec_set_name(test, "UMEM_HEADROOM");
test->ifobj_rx->umem->frame_headroom = UMEM_HEADROOM_TEST_SIZE;
testapp_validate_traffic(test);
}
static void testapp_stats_rx_dropped(struct test_spec *test)
{
test_spec_set_name(test, "STAT_RX_DROPPED");
pkt_stream_replace_half(test, MIN_PKT_SIZE * 4, 0);
test->ifobj_rx->umem->frame_headroom = test->ifobj_rx->umem->frame_size -
XDP_PACKET_HEADROOM - MIN_PKT_SIZE * 3;
pkt_stream_receive_half(test);
test->ifobj_rx->validation_func = validate_rx_dropped;
testapp_validate_traffic(test);
}
static void testapp_stats_tx_invalid_descs(struct test_spec *test)
{
test_spec_set_name(test, "STAT_TX_INVALID");
pkt_stream_replace_half(test, XSK_UMEM__INVALID_FRAME_SIZE, 0);
test->ifobj_tx->validation_func = validate_tx_invalid_descs;
testapp_validate_traffic(test);
}
static void testapp_stats_rx_full(struct test_spec *test)
{
test_spec_set_name(test, "STAT_RX_FULL");
pkt_stream_replace(test, DEFAULT_UMEM_BUFFERS + DEFAULT_UMEM_BUFFERS / 2, PKT_SIZE);
test->ifobj_rx->pkt_stream = pkt_stream_generate(test->ifobj_rx->umem,
DEFAULT_UMEM_BUFFERS, PKT_SIZE);
if (!test->ifobj_rx->pkt_stream)
exit_with_error(ENOMEM);
test->ifobj_rx->xsk->rxqsize = DEFAULT_UMEM_BUFFERS;
test->ifobj_rx->release_rx = false;
test->ifobj_rx->validation_func = validate_rx_full;
testapp_validate_traffic(test);
}
static void testapp_stats_fill_empty(struct test_spec *test)
{
test_spec_set_name(test, "STAT_RX_FILL_EMPTY");
pkt_stream_replace(test, DEFAULT_UMEM_BUFFERS + DEFAULT_UMEM_BUFFERS / 2, PKT_SIZE);
test->ifobj_rx->pkt_stream = pkt_stream_generate(test->ifobj_rx->umem,
DEFAULT_UMEM_BUFFERS, PKT_SIZE);
if (!test->ifobj_rx->pkt_stream)
exit_with_error(ENOMEM);
test->ifobj_rx->use_fill_ring = false;
test->ifobj_rx->validation_func = validate_fill_empty;
testapp_validate_traffic(test);
}
/* Simple test */
static bool hugepages_present(struct ifobject *ifobject)
{
size_t mmap_sz = 2 * ifobject->umem->num_frames * ifobject->umem->frame_size;
void *bufs;
bufs = mmap(NULL, mmap_sz, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_HUGE_2MB, -1, 0);
if (bufs == MAP_FAILED)
return false;
mmap_sz = ceil_u64(mmap_sz, HUGEPAGE_SIZE) * HUGEPAGE_SIZE;
munmap(bufs, mmap_sz);
return true;
}
static bool testapp_unaligned(struct test_spec *test)
{
if (!hugepages_present(test->ifobj_tx)) {
ksft_test_result_skip("No 2M huge pages present.\n");
return false;
}
test_spec_set_name(test, "UNALIGNED_MODE");
test->ifobj_tx->umem->unaligned_mode = true;
test->ifobj_rx->umem->unaligned_mode = true;
/* Let half of the packets straddle a buffer boundrary */
pkt_stream_replace_half(test, PKT_SIZE, -PKT_SIZE / 2);
test->ifobj_rx->pkt_stream->use_addr_for_fill = true;
testapp_validate_traffic(test);
return true;
}
static void testapp_single_pkt(struct test_spec *test)
{
struct pkt pkts[] = {{0x1000, PKT_SIZE, 0, true}};
pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts));
testapp_validate_traffic(test);
}
static void testapp_invalid_desc(struct test_spec *test)
{
u64 umem_size = test->ifobj_tx->umem->num_frames * test->ifobj_tx->umem->frame_size;
struct pkt pkts[] = {
/* Zero packet address allowed */
{0, PKT_SIZE, 0, true},
/* Allowed packet */
{0x1000, PKT_SIZE, 0, true},
/* Straddling the start of umem */
{-2, PKT_SIZE, 0, false},
/* Packet too large */
{0x2000, XSK_UMEM__INVALID_FRAME_SIZE, 0, false},
/* Up to end of umem allowed */
{umem_size - PKT_SIZE, PKT_SIZE, 0, true},
/* After umem ends */
{umem_size, PKT_SIZE, 0, false},
/* Straddle the end of umem */
{umem_size - PKT_SIZE / 2, PKT_SIZE, 0, false},
/* Straddle a page boundrary */
{0x3000 - PKT_SIZE / 2, PKT_SIZE, 0, false},
/* Straddle a 2K boundrary */
{0x3800 - PKT_SIZE / 2, PKT_SIZE, 0, true},
/* Valid packet for synch so that something is received */
{0x4000, PKT_SIZE, 0, true}};
if (test->ifobj_tx->umem->unaligned_mode) {
/* Crossing a page boundrary allowed */
pkts[7].valid = true;
}
if (test->ifobj_tx->umem->frame_size == XSK_UMEM__DEFAULT_FRAME_SIZE / 2) {
/* Crossing a 2K frame size boundrary not allowed */
pkts[8].valid = false;
}
if (test->ifobj_tx->shared_umem) {
pkts[4].addr += umem_size;
pkts[5].addr += umem_size;
pkts[6].addr += umem_size;
}
pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts));
testapp_validate_traffic(test);
}
static void testapp_xdp_drop(struct test_spec *test)
{
struct xsk_xdp_progs *skel_rx = test->ifobj_rx->xdp_progs;
struct xsk_xdp_progs *skel_tx = test->ifobj_tx->xdp_progs;
test_spec_set_name(test, "XDP_DROP_HALF");
test_spec_set_xdp_prog(test, skel_rx->progs.xsk_xdp_drop, skel_tx->progs.xsk_xdp_drop,
skel_rx->maps.xsk, skel_tx->maps.xsk);
pkt_stream_receive_half(test);
testapp_validate_traffic(test);
}
static void testapp_xdp_metadata_count(struct test_spec *test)
{
struct xsk_xdp_progs *skel_rx = test->ifobj_rx->xdp_progs;
struct xsk_xdp_progs *skel_tx = test->ifobj_tx->xdp_progs;
struct bpf_map *data_map;
int count = 0;
int key = 0;
test_spec_set_name(test, "XDP_METADATA_COUNT");
test_spec_set_xdp_prog(test, skel_rx->progs.xsk_xdp_populate_metadata,
skel_tx->progs.xsk_xdp_populate_metadata,
skel_rx->maps.xsk, skel_tx->maps.xsk);
test->ifobj_rx->use_metadata = true;
data_map = bpf_object__find_map_by_name(skel_rx->obj, "xsk_xdp_.bss");
if (!data_map || !bpf_map__is_internal(data_map))
exit_with_error(ENOMEM);
if (bpf_map_update_elem(bpf_map__fd(data_map), &key, &count, BPF_ANY))
exit_with_error(errno);
testapp_validate_traffic(test);
}
static void testapp_poll_txq_tmout(struct test_spec *test)
{
test_spec_set_name(test, "POLL_TXQ_FULL");
test->ifobj_tx->use_poll = true;
/* create invalid frame by set umem frame_size and pkt length equal to 2048 */
test->ifobj_tx->umem->frame_size = 2048;
pkt_stream_replace(test, 2 * DEFAULT_PKT_CNT, 2048);
testapp_validate_traffic_single_thread(test, test->ifobj_tx);
}
static void testapp_poll_rxq_tmout(struct test_spec *test)
{
test_spec_set_name(test, "POLL_RXQ_EMPTY");
test->ifobj_rx->use_poll = true;
testapp_validate_traffic_single_thread(test, test->ifobj_rx);
}
static int xsk_load_xdp_programs(struct ifobject *ifobj)
{
ifobj->xdp_progs = xsk_xdp_progs__open_and_load();
if (libbpf_get_error(ifobj->xdp_progs))
return libbpf_get_error(ifobj->xdp_progs);
return 0;
}
static void xsk_unload_xdp_programs(struct ifobject *ifobj)
{
xsk_xdp_progs__destroy(ifobj->xdp_progs);
}
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, thread_func_t func_ptr)
{
struct in_addr ip;
int err;
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;
ifobj->func_ptr = func_ptr;
err = xsk_load_xdp_programs(ifobj);
if (err) {
printf("Error loading XDP program\n");
exit_with_error(err);
}
}
static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_type type)
{
switch (type) {
case TEST_TYPE_STATS_RX_DROPPED:
if (mode == TEST_MODE_ZC) {
ksft_test_result_skip("Can not run RX_DROPPED test for ZC mode\n");
return;
}
testapp_stats_rx_dropped(test);
break;
case TEST_TYPE_STATS_TX_INVALID_DESCS:
testapp_stats_tx_invalid_descs(test);
break;
case TEST_TYPE_STATS_RX_FULL:
testapp_stats_rx_full(test);
break;
case TEST_TYPE_STATS_FILL_EMPTY:
testapp_stats_fill_empty(test);
break;
case TEST_TYPE_TEARDOWN:
testapp_teardown(test);
break;
case TEST_TYPE_BIDI:
testapp_bidi(test);
break;
case TEST_TYPE_BPF_RES:
testapp_bpf_res(test);
break;
case TEST_TYPE_RUN_TO_COMPLETION:
test_spec_set_name(test, "RUN_TO_COMPLETION");
testapp_validate_traffic(test);
break;
case TEST_TYPE_RUN_TO_COMPLETION_SINGLE_PKT:
test_spec_set_name(test, "RUN_TO_COMPLETION_SINGLE_PKT");
testapp_single_pkt(test);
break;
case TEST_TYPE_RUN_TO_COMPLETION_2K_FRAME:
test_spec_set_name(test, "RUN_TO_COMPLETION_2K_FRAME_SIZE");
test->ifobj_tx->umem->frame_size = 2048;
test->ifobj_rx->umem->frame_size = 2048;
pkt_stream_replace(test, DEFAULT_PKT_CNT, PKT_SIZE);
testapp_validate_traffic(test);
break;
case TEST_TYPE_RX_POLL:
test->ifobj_rx->use_poll = true;
test_spec_set_name(test, "POLL_RX");
testapp_validate_traffic(test);
break;
case TEST_TYPE_TX_POLL:
test->ifobj_tx->use_poll = true;
test_spec_set_name(test, "POLL_TX");
testapp_validate_traffic(test);
break;
case TEST_TYPE_POLL_TXQ_TMOUT:
testapp_poll_txq_tmout(test);
break;
case TEST_TYPE_POLL_RXQ_TMOUT:
testapp_poll_rxq_tmout(test);
break;
case TEST_TYPE_ALIGNED_INV_DESC:
test_spec_set_name(test, "ALIGNED_INV_DESC");
testapp_invalid_desc(test);
break;
case TEST_TYPE_ALIGNED_INV_DESC_2K_FRAME:
test_spec_set_name(test, "ALIGNED_INV_DESC_2K_FRAME_SIZE");
test->ifobj_tx->umem->frame_size = 2048;
test->ifobj_rx->umem->frame_size = 2048;
testapp_invalid_desc(test);
break;
case TEST_TYPE_UNALIGNED_INV_DESC:
if (!hugepages_present(test->ifobj_tx)) {
ksft_test_result_skip("No 2M huge pages present.\n");
return;
}
test_spec_set_name(test, "UNALIGNED_INV_DESC");
test->ifobj_tx->umem->unaligned_mode = true;
test->ifobj_rx->umem->unaligned_mode = true;
testapp_invalid_desc(test);
break;
case TEST_TYPE_UNALIGNED_INV_DESC_4K1_FRAME: {
u64 page_size, umem_size;
if (!hugepages_present(test->ifobj_tx)) {
ksft_test_result_skip("No 2M huge pages present.\n");
return;
}
test_spec_set_name(test, "UNALIGNED_INV_DESC_4K1_FRAME_SIZE");
/* Odd frame size so the UMEM doesn't end near a page boundary. */
test->ifobj_tx->umem->frame_size = 4001;
test->ifobj_rx->umem->frame_size = 4001;
test->ifobj_tx->umem->unaligned_mode = true;
test->ifobj_rx->umem->unaligned_mode = true;
/* This test exists to test descriptors that staddle the end of
* the UMEM but not a page.
*/
page_size = sysconf(_SC_PAGESIZE);
umem_size = test->ifobj_tx->umem->num_frames * test->ifobj_tx->umem->frame_size;
assert(umem_size % page_size > PKT_SIZE);
assert(umem_size % page_size < page_size - PKT_SIZE);
testapp_invalid_desc(test);
break;
}
case TEST_TYPE_UNALIGNED:
if (!testapp_unaligned(test))
return;
break;
case TEST_TYPE_HEADROOM:
testapp_headroom(test);
break;
case TEST_TYPE_XDP_DROP_HALF:
testapp_xdp_drop(test);
break;
case TEST_TYPE_XDP_METADATA_COUNT:
testapp_xdp_metadata_count(test);
break;
default:
break;
}
if (!test->fail)
ksft_test_result_pass("PASS: %s %s%s\n", mode_string(test), busy_poll_string(test),
test->name);
pkt_stream_restore_default(test);
}
static struct ifobject *ifobject_create(void)
{
struct ifobject *ifobj;
ifobj = calloc(1, sizeof(struct ifobject));
if (!ifobj)
return NULL;
ifobj->xsk_arr = calloc(MAX_SOCKETS, sizeof(*ifobj->xsk_arr));
if (!ifobj->xsk_arr)
goto out_xsk_arr;
ifobj->umem = calloc(1, sizeof(*ifobj->umem));
if (!ifobj->umem)
goto out_umem;
return ifobj;
out_umem:
free(ifobj->xsk_arr);
out_xsk_arr:
free(ifobj);
return NULL;
}
static void ifobject_delete(struct ifobject *ifobj)
{
free(ifobj->umem);
free(ifobj->xsk_arr);
free(ifobj);
}
static bool is_xdp_supported(int ifindex)
{
int flags = XDP_FLAGS_DRV_MODE;
LIBBPF_OPTS(bpf_link_create_opts, opts, .flags = flags);
struct bpf_insn insns[2] = {
BPF_MOV64_IMM(BPF_REG_0, XDP_PASS),
BPF_EXIT_INSN()
};
int prog_fd, insn_cnt = ARRAY_SIZE(insns);
int err;
prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "GPL", insns, insn_cnt, NULL);
if (prog_fd < 0)
return false;
err = bpf_xdp_attach(ifindex, prog_fd, flags, NULL);
if (err) {
close(prog_fd);
return false;
}
bpf_xdp_detach(ifindex, flags, NULL);
close(prog_fd);
return true;
}
int main(int argc, char **argv)
{
struct pkt_stream *rx_pkt_stream_default;
struct pkt_stream *tx_pkt_stream_default;
struct ifobject *ifobj_tx, *ifobj_rx;
int modes = TEST_MODE_SKB + 1;
u32 i, j, failed_tests = 0;
struct test_spec test;
bool shared_netdev;
/* Use libbpf 1.0 API mode */
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
ifobj_tx = ifobject_create();
if (!ifobj_tx)
exit_with_error(ENOMEM);
ifobj_rx = ifobject_create();
if (!ifobj_rx)
exit_with_error(ENOMEM);
setlocale(LC_ALL, "");
parse_command_line(ifobj_tx, ifobj_rx, argc, argv);
shared_netdev = (ifobj_tx->ifindex == ifobj_rx->ifindex);
ifobj_tx->shared_umem = shared_netdev;
ifobj_rx->shared_umem = shared_netdev;
if (!validate_interface(ifobj_tx) || !validate_interface(ifobj_rx)) {
usage(basename(argv[0]));
ksft_exit_xfail();
}
if (is_xdp_supported(ifobj_tx->ifindex)) {
modes++;
if (ifobj_zc_avail(ifobj_tx))
modes++;
}
init_iface(ifobj_rx, MAC1, MAC2, IP1, IP2, UDP_PORT1, UDP_PORT2,
worker_testapp_validate_rx);
init_iface(ifobj_tx, MAC2, MAC1, IP2, IP1, UDP_PORT2, UDP_PORT1,
worker_testapp_validate_tx);
test_spec_init(&test, ifobj_tx, ifobj_rx, 0);
tx_pkt_stream_default = pkt_stream_generate(ifobj_tx->umem, DEFAULT_PKT_CNT, PKT_SIZE);
rx_pkt_stream_default = pkt_stream_generate(ifobj_rx->umem, DEFAULT_PKT_CNT, PKT_SIZE);
if (!tx_pkt_stream_default || !rx_pkt_stream_default)
exit_with_error(ENOMEM);
test.tx_pkt_stream_default = tx_pkt_stream_default;
test.rx_pkt_stream_default = rx_pkt_stream_default;
ksft_set_plan(modes * TEST_TYPE_MAX);
for (i = 0; i < modes; i++) {
for (j = 0; j < TEST_TYPE_MAX; j++) {
test_spec_init(&test, ifobj_tx, ifobj_rx, i);
run_pkt_test(&test, i, j);
usleep(USLEEP_MAX);
if (test.fail)
failed_tests++;
}
}
pkt_stream_delete(tx_pkt_stream_default);
pkt_stream_delete(rx_pkt_stream_default);
xsk_unload_xdp_programs(ifobj_tx);
xsk_unload_xdp_programs(ifobj_rx);
ifobject_delete(ifobj_tx);
ifobject_delete(ifobj_rx);
if (failed_tests)
ksft_exit_fail();
else
ksft_exit_pass();
}
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