1
2
3
4#include <asm/barrier.h>
5#include <errno.h>
6#include <getopt.h>
7#include <libgen.h>
8#include <linux/bpf.h>
9#include <linux/compiler.h>
10#include <linux/if_link.h>
11#include <linux/if_xdp.h>
12#include <linux/if_ether.h>
13#include <linux/ip.h>
14#include <linux/limits.h>
15#include <linux/udp.h>
16#include <arpa/inet.h>
17#include <locale.h>
18#include <net/ethernet.h>
19#include <net/if.h>
20#include <poll.h>
21#include <pthread.h>
22#include <signal.h>
23#include <stdbool.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <sys/mman.h>
28#include <sys/resource.h>
29#include <sys/socket.h>
30#include <sys/types.h>
31#include <time.h>
32#include <unistd.h>
33
34#include <bpf/libbpf.h>
35#include <bpf/xsk.h>
36#include <bpf/bpf.h>
37#include "xdpsock.h"
38
39#ifndef SOL_XDP
40#define SOL_XDP 283
41#endif
42
43#ifndef AF_XDP
44#define AF_XDP 44
45#endif
46
47#ifndef PF_XDP
48#define PF_XDP AF_XDP
49#endif
50
51#define NUM_FRAMES (4 * 1024)
52#define MIN_PKT_SIZE 64
53
54#define DEBUG_HEXDUMP 0
55
56typedef __u64 u64;
57typedef __u32 u32;
58typedef __u16 u16;
59typedef __u8 u8;
60
61static unsigned long prev_time;
62
63enum benchmark_type {
64 BENCH_RXDROP = 0,
65 BENCH_TXONLY = 1,
66 BENCH_L2FWD = 2,
67};
68
69static enum benchmark_type opt_bench = BENCH_RXDROP;
70static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
71static const char *opt_if = "";
72static int opt_ifindex;
73static int opt_queue;
74static unsigned long opt_duration;
75static unsigned long start_time;
76static bool benchmark_done;
77static u32 opt_batch_size = 64;
78static int opt_pkt_count;
79static u16 opt_pkt_size = MIN_PKT_SIZE;
80static u32 opt_pkt_fill_pattern = 0x12345678;
81static bool opt_extra_stats;
82static bool opt_quiet;
83static bool opt_app_stats;
84static const char *opt_irq_str = "";
85static u32 irq_no;
86static int irqs_at_init = -1;
87static int opt_poll;
88static int opt_interval = 1;
89static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
90static u32 opt_umem_flags;
91static int opt_unaligned_chunks;
92static int opt_mmap_flags;
93static int opt_xsk_frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
94static int opt_timeout = 1000;
95static bool opt_need_wakeup = true;
96static u32 opt_num_xsks = 1;
97static u32 prog_id;
98
99struct xsk_ring_stats {
100 unsigned long rx_npkts;
101 unsigned long tx_npkts;
102 unsigned long rx_dropped_npkts;
103 unsigned long rx_invalid_npkts;
104 unsigned long tx_invalid_npkts;
105 unsigned long rx_full_npkts;
106 unsigned long rx_fill_empty_npkts;
107 unsigned long tx_empty_npkts;
108 unsigned long prev_rx_npkts;
109 unsigned long prev_tx_npkts;
110 unsigned long prev_rx_dropped_npkts;
111 unsigned long prev_rx_invalid_npkts;
112 unsigned long prev_tx_invalid_npkts;
113 unsigned long prev_rx_full_npkts;
114 unsigned long prev_rx_fill_empty_npkts;
115 unsigned long prev_tx_empty_npkts;
116};
117
118struct xsk_driver_stats {
119 unsigned long intrs;
120 unsigned long prev_intrs;
121};
122
123struct xsk_app_stats {
124 unsigned long rx_empty_polls;
125 unsigned long fill_fail_polls;
126 unsigned long copy_tx_sendtos;
127 unsigned long tx_wakeup_sendtos;
128 unsigned long opt_polls;
129 unsigned long prev_rx_empty_polls;
130 unsigned long prev_fill_fail_polls;
131 unsigned long prev_copy_tx_sendtos;
132 unsigned long prev_tx_wakeup_sendtos;
133 unsigned long prev_opt_polls;
134};
135
136struct xsk_umem_info {
137 struct xsk_ring_prod fq;
138 struct xsk_ring_cons cq;
139 struct xsk_umem *umem;
140 void *buffer;
141};
142
143struct xsk_socket_info {
144 struct xsk_ring_cons rx;
145 struct xsk_ring_prod tx;
146 struct xsk_umem_info *umem;
147 struct xsk_socket *xsk;
148 struct xsk_ring_stats ring_stats;
149 struct xsk_app_stats app_stats;
150 struct xsk_driver_stats drv_stats;
151 u32 outstanding_tx;
152};
153
154static int num_socks;
155struct xsk_socket_info *xsks[MAX_SOCKS];
156
157static unsigned long get_nsecs(void)
158{
159 struct timespec ts;
160
161 clock_gettime(CLOCK_MONOTONIC, &ts);
162 return ts.tv_sec * 1000000000UL + ts.tv_nsec;
163}
164
165static void print_benchmark(bool running)
166{
167 const char *bench_str = "INVALID";
168
169 if (opt_bench == BENCH_RXDROP)
170 bench_str = "rxdrop";
171 else if (opt_bench == BENCH_TXONLY)
172 bench_str = "txonly";
173 else if (opt_bench == BENCH_L2FWD)
174 bench_str = "l2fwd";
175
176 printf("%s:%d %s ", opt_if, opt_queue, bench_str);
177 if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
178 printf("xdp-skb ");
179 else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
180 printf("xdp-drv ");
181 else
182 printf(" ");
183
184 if (opt_poll)
185 printf("poll() ");
186
187 if (running) {
188 printf("running...");
189 fflush(stdout);
190 }
191}
192
193static int xsk_get_xdp_stats(int fd, struct xsk_socket_info *xsk)
194{
195 struct xdp_statistics stats;
196 socklen_t optlen;
197 int err;
198
199 optlen = sizeof(stats);
200 err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
201 if (err)
202 return err;
203
204 if (optlen == sizeof(struct xdp_statistics)) {
205 xsk->ring_stats.rx_dropped_npkts = stats.rx_dropped;
206 xsk->ring_stats.rx_invalid_npkts = stats.rx_invalid_descs;
207 xsk->ring_stats.tx_invalid_npkts = stats.tx_invalid_descs;
208 xsk->ring_stats.rx_full_npkts = stats.rx_ring_full;
209 xsk->ring_stats.rx_fill_empty_npkts = stats.rx_fill_ring_empty_descs;
210 xsk->ring_stats.tx_empty_npkts = stats.tx_ring_empty_descs;
211 return 0;
212 }
213
214 return -EINVAL;
215}
216
217static void dump_app_stats(long dt)
218{
219 int i;
220
221 for (i = 0; i < num_socks && xsks[i]; i++) {
222 char *fmt = "%-18s %'-14.0f %'-14lu\n";
223 double rx_empty_polls_ps, fill_fail_polls_ps, copy_tx_sendtos_ps,
224 tx_wakeup_sendtos_ps, opt_polls_ps;
225
226 rx_empty_polls_ps = (xsks[i]->app_stats.rx_empty_polls -
227 xsks[i]->app_stats.prev_rx_empty_polls) * 1000000000. / dt;
228 fill_fail_polls_ps = (xsks[i]->app_stats.fill_fail_polls -
229 xsks[i]->app_stats.prev_fill_fail_polls) * 1000000000. / dt;
230 copy_tx_sendtos_ps = (xsks[i]->app_stats.copy_tx_sendtos -
231 xsks[i]->app_stats.prev_copy_tx_sendtos) * 1000000000. / dt;
232 tx_wakeup_sendtos_ps = (xsks[i]->app_stats.tx_wakeup_sendtos -
233 xsks[i]->app_stats.prev_tx_wakeup_sendtos)
234 * 1000000000. / dt;
235 opt_polls_ps = (xsks[i]->app_stats.opt_polls -
236 xsks[i]->app_stats.prev_opt_polls) * 1000000000. / dt;
237
238 printf("\n%-18s %-14s %-14s\n", "", "calls/s", "count");
239 printf(fmt, "rx empty polls", rx_empty_polls_ps, xsks[i]->app_stats.rx_empty_polls);
240 printf(fmt, "fill fail polls", fill_fail_polls_ps,
241 xsks[i]->app_stats.fill_fail_polls);
242 printf(fmt, "copy tx sendtos", copy_tx_sendtos_ps,
243 xsks[i]->app_stats.copy_tx_sendtos);
244 printf(fmt, "tx wakeup sendtos", tx_wakeup_sendtos_ps,
245 xsks[i]->app_stats.tx_wakeup_sendtos);
246 printf(fmt, "opt polls", opt_polls_ps, xsks[i]->app_stats.opt_polls);
247
248 xsks[i]->app_stats.prev_rx_empty_polls = xsks[i]->app_stats.rx_empty_polls;
249 xsks[i]->app_stats.prev_fill_fail_polls = xsks[i]->app_stats.fill_fail_polls;
250 xsks[i]->app_stats.prev_copy_tx_sendtos = xsks[i]->app_stats.copy_tx_sendtos;
251 xsks[i]->app_stats.prev_tx_wakeup_sendtos = xsks[i]->app_stats.tx_wakeup_sendtos;
252 xsks[i]->app_stats.prev_opt_polls = xsks[i]->app_stats.opt_polls;
253 }
254}
255
256static bool get_interrupt_number(void)
257{
258 FILE *f_int_proc;
259 char line[4096];
260 bool found = false;
261
262 f_int_proc = fopen("/proc/interrupts", "r");
263 if (f_int_proc == NULL) {
264 printf("Failed to open /proc/interrupts.\n");
265 return found;
266 }
267
268 while (!feof(f_int_proc) && !found) {
269
270 if (fgets(line, sizeof(line), f_int_proc) == NULL ||
271 line[strlen(line) - 1] != '\n') {
272 printf("Error reading from interrupts file\n");
273 break;
274 }
275
276
277 if (strstr(line, opt_irq_str) != NULL) {
278 irq_no = atoi(line);
279 found = true;
280 break;
281 }
282 }
283
284 fclose(f_int_proc);
285
286 return found;
287}
288
289static int get_irqs(void)
290{
291 char count_path[PATH_MAX];
292 int total_intrs = -1;
293 FILE *f_count_proc;
294 char line[4096];
295
296 snprintf(count_path, sizeof(count_path),
297 "/sys/kernel/irq/%i/per_cpu_count", irq_no);
298 f_count_proc = fopen(count_path, "r");
299 if (f_count_proc == NULL) {
300 printf("Failed to open %s\n", count_path);
301 return total_intrs;
302 }
303
304 if (fgets(line, sizeof(line), f_count_proc) == NULL ||
305 line[strlen(line) - 1] != '\n') {
306 printf("Error reading from %s\n", count_path);
307 } else {
308 static const char com[2] = ",";
309 char *token;
310
311 total_intrs = 0;
312 token = strtok(line, com);
313 while (token != NULL) {
314
315 total_intrs += atoi(token);
316 token = strtok(NULL, com);
317 }
318 }
319
320 fclose(f_count_proc);
321
322 return total_intrs;
323}
324
325static void dump_driver_stats(long dt)
326{
327 int i;
328
329 for (i = 0; i < num_socks && xsks[i]; i++) {
330 char *fmt = "%-18s %'-14.0f %'-14lu\n";
331 double intrs_ps;
332 int n_ints = get_irqs();
333
334 if (n_ints < 0) {
335 printf("error getting intr info for intr %i\n", irq_no);
336 return;
337 }
338 xsks[i]->drv_stats.intrs = n_ints - irqs_at_init;
339
340 intrs_ps = (xsks[i]->drv_stats.intrs - xsks[i]->drv_stats.prev_intrs) *
341 1000000000. / dt;
342
343 printf("\n%-18s %-14s %-14s\n", "", "intrs/s", "count");
344 printf(fmt, "irqs", intrs_ps, xsks[i]->drv_stats.intrs);
345
346 xsks[i]->drv_stats.prev_intrs = xsks[i]->drv_stats.intrs;
347 }
348}
349
350static void dump_stats(void)
351{
352 unsigned long now = get_nsecs();
353 long dt = now - prev_time;
354 int i;
355
356 prev_time = now;
357
358 for (i = 0; i < num_socks && xsks[i]; i++) {
359 char *fmt = "%-18s %'-14.0f %'-14lu\n";
360 double rx_pps, tx_pps, dropped_pps, rx_invalid_pps, full_pps, fill_empty_pps,
361 tx_invalid_pps, tx_empty_pps;
362
363 rx_pps = (xsks[i]->ring_stats.rx_npkts - xsks[i]->ring_stats.prev_rx_npkts) *
364 1000000000. / dt;
365 tx_pps = (xsks[i]->ring_stats.tx_npkts - xsks[i]->ring_stats.prev_tx_npkts) *
366 1000000000. / dt;
367
368 printf("\n sock%d@", i);
369 print_benchmark(false);
370 printf("\n");
371
372 printf("%-18s %-14s %-14s %-14.2f\n", "", "pps", "pkts",
373 dt / 1000000000.);
374 printf(fmt, "rx", rx_pps, xsks[i]->ring_stats.rx_npkts);
375 printf(fmt, "tx", tx_pps, xsks[i]->ring_stats.tx_npkts);
376
377 xsks[i]->ring_stats.prev_rx_npkts = xsks[i]->ring_stats.rx_npkts;
378 xsks[i]->ring_stats.prev_tx_npkts = xsks[i]->ring_stats.tx_npkts;
379
380 if (opt_extra_stats) {
381 if (!xsk_get_xdp_stats(xsk_socket__fd(xsks[i]->xsk), xsks[i])) {
382 dropped_pps = (xsks[i]->ring_stats.rx_dropped_npkts -
383 xsks[i]->ring_stats.prev_rx_dropped_npkts) *
384 1000000000. / dt;
385 rx_invalid_pps = (xsks[i]->ring_stats.rx_invalid_npkts -
386 xsks[i]->ring_stats.prev_rx_invalid_npkts) *
387 1000000000. / dt;
388 tx_invalid_pps = (xsks[i]->ring_stats.tx_invalid_npkts -
389 xsks[i]->ring_stats.prev_tx_invalid_npkts) *
390 1000000000. / dt;
391 full_pps = (xsks[i]->ring_stats.rx_full_npkts -
392 xsks[i]->ring_stats.prev_rx_full_npkts) *
393 1000000000. / dt;
394 fill_empty_pps = (xsks[i]->ring_stats.rx_fill_empty_npkts -
395 xsks[i]->ring_stats.prev_rx_fill_empty_npkts) *
396 1000000000. / dt;
397 tx_empty_pps = (xsks[i]->ring_stats.tx_empty_npkts -
398 xsks[i]->ring_stats.prev_tx_empty_npkts) *
399 1000000000. / dt;
400
401 printf(fmt, "rx dropped", dropped_pps,
402 xsks[i]->ring_stats.rx_dropped_npkts);
403 printf(fmt, "rx invalid", rx_invalid_pps,
404 xsks[i]->ring_stats.rx_invalid_npkts);
405 printf(fmt, "tx invalid", tx_invalid_pps,
406 xsks[i]->ring_stats.tx_invalid_npkts);
407 printf(fmt, "rx queue full", full_pps,
408 xsks[i]->ring_stats.rx_full_npkts);
409 printf(fmt, "fill ring empty", fill_empty_pps,
410 xsks[i]->ring_stats.rx_fill_empty_npkts);
411 printf(fmt, "tx ring empty", tx_empty_pps,
412 xsks[i]->ring_stats.tx_empty_npkts);
413
414 xsks[i]->ring_stats.prev_rx_dropped_npkts =
415 xsks[i]->ring_stats.rx_dropped_npkts;
416 xsks[i]->ring_stats.prev_rx_invalid_npkts =
417 xsks[i]->ring_stats.rx_invalid_npkts;
418 xsks[i]->ring_stats.prev_tx_invalid_npkts =
419 xsks[i]->ring_stats.tx_invalid_npkts;
420 xsks[i]->ring_stats.prev_rx_full_npkts =
421 xsks[i]->ring_stats.rx_full_npkts;
422 xsks[i]->ring_stats.prev_rx_fill_empty_npkts =
423 xsks[i]->ring_stats.rx_fill_empty_npkts;
424 xsks[i]->ring_stats.prev_tx_empty_npkts =
425 xsks[i]->ring_stats.tx_empty_npkts;
426 } else {
427 printf("%-15s\n", "Error retrieving extra stats");
428 }
429 }
430 }
431
432 if (opt_app_stats)
433 dump_app_stats(dt);
434 if (irq_no)
435 dump_driver_stats(dt);
436}
437
438static bool is_benchmark_done(void)
439{
440 if (opt_duration > 0) {
441 unsigned long dt = (get_nsecs() - start_time);
442
443 if (dt >= opt_duration)
444 benchmark_done = true;
445 }
446 return benchmark_done;
447}
448
449static void *poller(void *arg)
450{
451 (void)arg;
452 while (!is_benchmark_done()) {
453 sleep(opt_interval);
454 dump_stats();
455 }
456
457 return NULL;
458}
459
460static void remove_xdp_program(void)
461{
462 u32 curr_prog_id = 0;
463
464 if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) {
465 printf("bpf_get_link_xdp_id failed\n");
466 exit(EXIT_FAILURE);
467 }
468 if (prog_id == curr_prog_id)
469 bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
470 else if (!curr_prog_id)
471 printf("couldn't find a prog id on a given interface\n");
472 else
473 printf("program on interface changed, not removing\n");
474}
475
476static void int_exit(int sig)
477{
478 benchmark_done = true;
479}
480
481static void xdpsock_cleanup(void)
482{
483 struct xsk_umem *umem = xsks[0]->umem->umem;
484 int i;
485
486 dump_stats();
487 for (i = 0; i < num_socks; i++)
488 xsk_socket__delete(xsks[i]->xsk);
489 (void)xsk_umem__delete(umem);
490 remove_xdp_program();
491}
492
493static void __exit_with_error(int error, const char *file, const char *func,
494 int line)
495{
496 fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
497 line, error, strerror(error));
498 dump_stats();
499 remove_xdp_program();
500 exit(EXIT_FAILURE);
501}
502
503#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \
504 __LINE__)
505static void swap_mac_addresses(void *data)
506{
507 struct ether_header *eth = (struct ether_header *)data;
508 struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
509 struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
510 struct ether_addr tmp;
511
512 tmp = *src_addr;
513 *src_addr = *dst_addr;
514 *dst_addr = tmp;
515}
516
517static void hex_dump(void *pkt, size_t length, u64 addr)
518{
519 const unsigned char *address = (unsigned char *)pkt;
520 const unsigned char *line = address;
521 size_t line_size = 32;
522 unsigned char c;
523 char buf[32];
524 int i = 0;
525
526 if (!DEBUG_HEXDUMP)
527 return;
528
529 sprintf(buf, "addr=%llu", addr);
530 printf("length = %zu\n", length);
531 printf("%s | ", buf);
532 while (length-- > 0) {
533 printf("%02X ", *address++);
534 if (!(++i % line_size) || (length == 0 && i % line_size)) {
535 if (length == 0) {
536 while (i++ % line_size)
537 printf("__ ");
538 }
539 printf(" | ");
540 while (line < address) {
541 c = *line++;
542 printf("%c", (c < 33 || c == 255) ? 0x2E : c);
543 }
544 printf("\n");
545 if (length > 0)
546 printf("%s | ", buf);
547 }
548 }
549 printf("\n");
550}
551
552static void *memset32_htonl(void *dest, u32 val, u32 size)
553{
554 u32 *ptr = (u32 *)dest;
555 int i;
556
557 val = htonl(val);
558
559 for (i = 0; i < (size & (~0x3)); i += 4)
560 ptr[i >> 2] = val;
561
562 for (; i < size; i++)
563 ((char *)dest)[i] = ((char *)&val)[i & 3];
564
565 return dest;
566}
567
568
569
570
571
572static inline unsigned short from32to16(unsigned int x)
573{
574
575 x = (x & 0xffff) + (x >> 16);
576
577 x = (x & 0xffff) + (x >> 16);
578 return x;
579}
580
581
582
583
584
585static unsigned int do_csum(const unsigned char *buff, int len)
586{
587 unsigned int result = 0;
588 int odd;
589
590 if (len <= 0)
591 goto out;
592 odd = 1 & (unsigned long)buff;
593 if (odd) {
594#ifdef __LITTLE_ENDIAN
595 result += (*buff << 8);
596#else
597 result = *buff;
598#endif
599 len--;
600 buff++;
601 }
602 if (len >= 2) {
603 if (2 & (unsigned long)buff) {
604 result += *(unsigned short *)buff;
605 len -= 2;
606 buff += 2;
607 }
608 if (len >= 4) {
609 const unsigned char *end = buff +
610 ((unsigned int)len & ~3);
611 unsigned int carry = 0;
612
613 do {
614 unsigned int w = *(unsigned int *)buff;
615
616 buff += 4;
617 result += carry;
618 result += w;
619 carry = (w > result);
620 } while (buff < end);
621 result += carry;
622 result = (result & 0xffff) + (result >> 16);
623 }
624 if (len & 2) {
625 result += *(unsigned short *)buff;
626 buff += 2;
627 }
628 }
629 if (len & 1)
630#ifdef __LITTLE_ENDIAN
631 result += *buff;
632#else
633 result += (*buff << 8);
634#endif
635 result = from32to16(result);
636 if (odd)
637 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
638out:
639 return result;
640}
641
642__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
643
644
645
646
647
648
649
650__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
651{
652 return (__force __sum16)~do_csum(iph, ihl * 4);
653}
654
655
656
657
658
659
660static inline __sum16 csum_fold(__wsum csum)
661{
662 u32 sum = (__force u32)csum;
663
664 sum = (sum & 0xffff) + (sum >> 16);
665 sum = (sum & 0xffff) + (sum >> 16);
666 return (__force __sum16)~sum;
667}
668
669
670
671
672
673static inline u32 from64to32(u64 x)
674{
675
676 x = (x & 0xffffffff) + (x >> 32);
677
678 x = (x & 0xffffffff) + (x >> 32);
679 return (u32)x;
680}
681
682__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
683 __u32 len, __u8 proto, __wsum sum);
684
685
686
687
688
689__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
690 __u32 len, __u8 proto, __wsum sum)
691{
692 unsigned long long s = (__force u32)sum;
693
694 s += (__force u32)saddr;
695 s += (__force u32)daddr;
696#ifdef __BIG_ENDIAN__
697 s += proto + len;
698#else
699 s += (proto + len) << 8;
700#endif
701 return (__force __wsum)from64to32(s);
702}
703
704
705
706
707
708static inline __sum16
709csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len,
710 __u8 proto, __wsum sum)
711{
712 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
713}
714
715static inline u16 udp_csum(u32 saddr, u32 daddr, u32 len,
716 u8 proto, u16 *udp_pkt)
717{
718 u32 csum = 0;
719 u32 cnt = 0;
720
721
722 for (; cnt < len; cnt += 2)
723 csum += udp_pkt[cnt >> 1];
724
725 return csum_tcpudp_magic(saddr, daddr, len, proto, csum);
726}
727
728#define ETH_FCS_SIZE 4
729
730#define PKT_HDR_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
731 sizeof(struct udphdr))
732
733#define PKT_SIZE (opt_pkt_size - ETH_FCS_SIZE)
734#define IP_PKT_SIZE (PKT_SIZE - sizeof(struct ethhdr))
735#define UDP_PKT_SIZE (IP_PKT_SIZE - sizeof(struct iphdr))
736#define UDP_PKT_DATA_SIZE (UDP_PKT_SIZE - sizeof(struct udphdr))
737
738static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
739
740static void gen_eth_hdr_data(void)
741{
742 struct udphdr *udp_hdr = (struct udphdr *)(pkt_data +
743 sizeof(struct ethhdr) +
744 sizeof(struct iphdr));
745 struct iphdr *ip_hdr = (struct iphdr *)(pkt_data +
746 sizeof(struct ethhdr));
747 struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
748
749
750 memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
751 memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
752 eth_hdr->h_proto = htons(ETH_P_IP);
753
754
755 ip_hdr->version = IPVERSION;
756 ip_hdr->ihl = 0x5;
757 ip_hdr->tos = 0x0;
758 ip_hdr->tot_len = htons(IP_PKT_SIZE);
759 ip_hdr->id = 0;
760 ip_hdr->frag_off = 0;
761 ip_hdr->ttl = IPDEFTTL;
762 ip_hdr->protocol = IPPROTO_UDP;
763 ip_hdr->saddr = htonl(0x0a0a0a10);
764 ip_hdr->daddr = htonl(0x0a0a0a20);
765
766
767 ip_hdr->check = 0;
768 ip_hdr->check = ip_fast_csum((const void *)ip_hdr, ip_hdr->ihl);
769
770
771 udp_hdr->source = htons(0x1000);
772 udp_hdr->dest = htons(0x1000);
773 udp_hdr->len = htons(UDP_PKT_SIZE);
774
775
776 memset32_htonl(pkt_data + PKT_HDR_SIZE, opt_pkt_fill_pattern,
777 UDP_PKT_DATA_SIZE);
778
779
780 udp_hdr->check = 0;
781 udp_hdr->check = udp_csum(ip_hdr->saddr, ip_hdr->daddr, UDP_PKT_SIZE,
782 IPPROTO_UDP, (u16 *)udp_hdr);
783}
784
785static void gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
786{
787 memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data,
788 PKT_SIZE);
789}
790
791static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
792{
793 struct xsk_umem_info *umem;
794 struct xsk_umem_config cfg = {
795
796
797
798
799
800
801
802
803
804 .fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS * 2,
805 .comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
806 .frame_size = opt_xsk_frame_size,
807 .frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
808 .flags = opt_umem_flags
809 };
810 int ret;
811
812 umem = calloc(1, sizeof(*umem));
813 if (!umem)
814 exit_with_error(errno);
815
816 ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
817 &cfg);
818 if (ret)
819 exit_with_error(-ret);
820
821 umem->buffer = buffer;
822 return umem;
823}
824
825static void xsk_populate_fill_ring(struct xsk_umem_info *umem)
826{
827 int ret, i;
828 u32 idx;
829
830 ret = xsk_ring_prod__reserve(&umem->fq,
831 XSK_RING_PROD__DEFAULT_NUM_DESCS * 2, &idx);
832 if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS * 2)
833 exit_with_error(-ret);
834 for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS * 2; i++)
835 *xsk_ring_prod__fill_addr(&umem->fq, idx++) =
836 i * opt_xsk_frame_size;
837 xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS * 2);
838}
839
840static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem,
841 bool rx, bool tx)
842{
843 struct xsk_socket_config cfg;
844 struct xsk_socket_info *xsk;
845 struct xsk_ring_cons *rxr;
846 struct xsk_ring_prod *txr;
847 int ret;
848
849 xsk = calloc(1, sizeof(*xsk));
850 if (!xsk)
851 exit_with_error(errno);
852
853 xsk->umem = umem;
854 cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
855 cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
856 if (opt_num_xsks > 1)
857 cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
858 else
859 cfg.libbpf_flags = 0;
860 cfg.xdp_flags = opt_xdp_flags;
861 cfg.bind_flags = opt_xdp_bind_flags;
862
863 rxr = rx ? &xsk->rx : NULL;
864 txr = tx ? &xsk->tx : NULL;
865 ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
866 rxr, txr, &cfg);
867 if (ret)
868 exit_with_error(-ret);
869
870 ret = bpf_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags);
871 if (ret)
872 exit_with_error(-ret);
873
874 xsk->app_stats.rx_empty_polls = 0;
875 xsk->app_stats.fill_fail_polls = 0;
876 xsk->app_stats.copy_tx_sendtos = 0;
877 xsk->app_stats.tx_wakeup_sendtos = 0;
878 xsk->app_stats.opt_polls = 0;
879 xsk->app_stats.prev_rx_empty_polls = 0;
880 xsk->app_stats.prev_fill_fail_polls = 0;
881 xsk->app_stats.prev_copy_tx_sendtos = 0;
882 xsk->app_stats.prev_tx_wakeup_sendtos = 0;
883 xsk->app_stats.prev_opt_polls = 0;
884
885 return xsk;
886}
887
888static struct option long_options[] = {
889 {"rxdrop", no_argument, 0, 'r'},
890 {"txonly", no_argument, 0, 't'},
891 {"l2fwd", no_argument, 0, 'l'},
892 {"interface", required_argument, 0, 'i'},
893 {"queue", required_argument, 0, 'q'},
894 {"poll", no_argument, 0, 'p'},
895 {"xdp-skb", no_argument, 0, 'S'},
896 {"xdp-native", no_argument, 0, 'N'},
897 {"interval", required_argument, 0, 'n'},
898 {"zero-copy", no_argument, 0, 'z'},
899 {"copy", no_argument, 0, 'c'},
900 {"frame-size", required_argument, 0, 'f'},
901 {"no-need-wakeup", no_argument, 0, 'm'},
902 {"unaligned", no_argument, 0, 'u'},
903 {"shared-umem", no_argument, 0, 'M'},
904 {"force", no_argument, 0, 'F'},
905 {"duration", required_argument, 0, 'd'},
906 {"batch-size", required_argument, 0, 'b'},
907 {"tx-pkt-count", required_argument, 0, 'C'},
908 {"tx-pkt-size", required_argument, 0, 's'},
909 {"tx-pkt-pattern", required_argument, 0, 'P'},
910 {"extra-stats", no_argument, 0, 'x'},
911 {"quiet", no_argument, 0, 'Q'},
912 {"app-stats", no_argument, 0, 'a'},
913 {"irq-string", no_argument, 0, 'I'},
914 {0, 0, 0, 0}
915};
916
917static void usage(const char *prog)
918{
919 const char *str =
920 " Usage: %s [OPTIONS]\n"
921 " Options:\n"
922 " -r, --rxdrop Discard all incoming packets (default)\n"
923 " -t, --txonly Only send packets\n"
924 " -l, --l2fwd MAC swap L2 forwarding\n"
925 " -i, --interface=n Run on interface n\n"
926 " -q, --queue=n Use queue n (default 0)\n"
927 " -p, --poll Use poll syscall\n"
928 " -S, --xdp-skb=n Use XDP skb-mod\n"
929 " -N, --xdp-native=n Enforce XDP native mode\n"
930 " -n, --interval=n Specify statistics update interval (default 1 sec).\n"
931 " -z, --zero-copy Force zero-copy mode.\n"
932 " -c, --copy Force copy mode.\n"
933 " -m, --no-need-wakeup Turn off use of driver need wakeup flag.\n"
934 " -f, --frame-size=n Set the frame size (must be a power of two in aligned mode, default is %d).\n"
935 " -u, --unaligned Enable unaligned chunk placement\n"
936 " -M, --shared-umem Enable XDP_SHARED_UMEM\n"
937 " -F, --force Force loading the XDP prog\n"
938 " -d, --duration=n Duration in secs to run command.\n"
939 " Default: forever.\n"
940 " -b, --batch-size=n Batch size for sending or receiving\n"
941 " packets. Default: %d\n"
942 " -C, --tx-pkt-count=n Number of packets to send.\n"
943 " Default: Continuous packets.\n"
944 " -s, --tx-pkt-size=n Transmit packet size.\n"
945 " (Default: %d bytes)\n"
946 " Min size: %d, Max size %d.\n"
947 " -P, --tx-pkt-pattern=nPacket fill pattern. Default: 0x%x\n"
948 " -x, --extra-stats Display extra statistics.\n"
949 " -Q, --quiet Do not display any stats.\n"
950 " -a, --app-stats Display application (syscall) statistics.\n"
951 " -I, --irq-string Display driver interrupt statistics for interface associated with irq-string.\n"
952 "\n";
953 fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE,
954 opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE,
955 XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern);
956
957 exit(EXIT_FAILURE);
958}
959
960static void parse_command_line(int argc, char **argv)
961{
962 int option_index, c;
963
964 opterr = 0;
965
966 for (;;) {
967 c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:xQaI:",
968 long_options, &option_index);
969 if (c == -1)
970 break;
971
972 switch (c) {
973 case 'r':
974 opt_bench = BENCH_RXDROP;
975 break;
976 case 't':
977 opt_bench = BENCH_TXONLY;
978 break;
979 case 'l':
980 opt_bench = BENCH_L2FWD;
981 break;
982 case 'i':
983 opt_if = optarg;
984 break;
985 case 'q':
986 opt_queue = atoi(optarg);
987 break;
988 case 'p':
989 opt_poll = 1;
990 break;
991 case 'S':
992 opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
993 opt_xdp_bind_flags |= XDP_COPY;
994 break;
995 case 'N':
996
997 break;
998 case 'n':
999 opt_interval = atoi(optarg);
1000 break;
1001 case 'z':
1002 opt_xdp_bind_flags |= XDP_ZEROCOPY;
1003 break;
1004 case 'c':
1005 opt_xdp_bind_flags |= XDP_COPY;
1006 break;
1007 case 'u':
1008 opt_umem_flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;
1009 opt_unaligned_chunks = 1;
1010 opt_mmap_flags = MAP_HUGETLB;
1011 break;
1012 case 'F':
1013 opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
1014 break;
1015 case 'f':
1016 opt_xsk_frame_size = atoi(optarg);
1017 break;
1018 case 'm':
1019 opt_need_wakeup = false;
1020 opt_xdp_bind_flags &= ~XDP_USE_NEED_WAKEUP;
1021 break;
1022 case 'M':
1023 opt_num_xsks = MAX_SOCKS;
1024 break;
1025 case 'd':
1026 opt_duration = atoi(optarg);
1027 opt_duration *= 1000000000;
1028 break;
1029 case 'b':
1030 opt_batch_size = atoi(optarg);
1031 break;
1032 case 'C':
1033 opt_pkt_count = atoi(optarg);
1034 break;
1035 case 's':
1036 opt_pkt_size = atoi(optarg);
1037 if (opt_pkt_size > (XSK_UMEM__DEFAULT_FRAME_SIZE) ||
1038 opt_pkt_size < MIN_PKT_SIZE) {
1039 fprintf(stderr,
1040 "ERROR: Invalid frame size %d\n",
1041 opt_pkt_size);
1042 usage(basename(argv[0]));
1043 }
1044 break;
1045 case 'P':
1046 opt_pkt_fill_pattern = strtol(optarg, NULL, 16);
1047 break;
1048 case 'x':
1049 opt_extra_stats = 1;
1050 break;
1051 case 'Q':
1052 opt_quiet = 1;
1053 break;
1054 case 'a':
1055 opt_app_stats = 1;
1056 break;
1057 case 'I':
1058 opt_irq_str = optarg;
1059 if (get_interrupt_number())
1060 irqs_at_init = get_irqs();
1061 if (irqs_at_init < 0) {
1062 fprintf(stderr, "ERROR: Failed to get irqs for %s\n", opt_irq_str);
1063 usage(basename(argv[0]));
1064 }
1065
1066 break;
1067 default:
1068 usage(basename(argv[0]));
1069 }
1070 }
1071
1072 if (!(opt_xdp_flags & XDP_FLAGS_SKB_MODE))
1073 opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
1074
1075 opt_ifindex = if_nametoindex(opt_if);
1076 if (!opt_ifindex) {
1077 fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
1078 opt_if);
1079 usage(basename(argv[0]));
1080 }
1081
1082 if ((opt_xsk_frame_size & (opt_xsk_frame_size - 1)) &&
1083 !opt_unaligned_chunks) {
1084 fprintf(stderr, "--frame-size=%d is not a power of two\n",
1085 opt_xsk_frame_size);
1086 usage(basename(argv[0]));
1087 }
1088}
1089
1090static void kick_tx(struct xsk_socket_info *xsk)
1091{
1092 int ret;
1093
1094 ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
1095 if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN ||
1096 errno == EBUSY || errno == ENETDOWN)
1097 return;
1098 exit_with_error(errno);
1099}
1100
1101static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk,
1102 struct pollfd *fds)
1103{
1104 struct xsk_umem_info *umem = xsk->umem;
1105 u32 idx_cq = 0, idx_fq = 0;
1106 unsigned int rcvd;
1107 size_t ndescs;
1108
1109 if (!xsk->outstanding_tx)
1110 return;
1111
1112
1113
1114
1115
1116
1117 if (opt_xdp_bind_flags & XDP_COPY) {
1118 xsk->app_stats.copy_tx_sendtos++;
1119 kick_tx(xsk);
1120 }
1121
1122 ndescs = (xsk->outstanding_tx > opt_batch_size) ? opt_batch_size :
1123 xsk->outstanding_tx;
1124
1125
1126 rcvd = xsk_ring_cons__peek(&umem->cq, ndescs, &idx_cq);
1127 if (rcvd > 0) {
1128 unsigned int i;
1129 int ret;
1130
1131 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
1132 while (ret != rcvd) {
1133 if (ret < 0)
1134 exit_with_error(-ret);
1135 if (xsk_ring_prod__needs_wakeup(&umem->fq)) {
1136 xsk->app_stats.fill_fail_polls++;
1137 ret = poll(fds, num_socks, opt_timeout);
1138 }
1139 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
1140 }
1141
1142 for (i = 0; i < rcvd; i++)
1143 *xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) =
1144 *xsk_ring_cons__comp_addr(&umem->cq, idx_cq++);
1145
1146 xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
1147 xsk_ring_cons__release(&xsk->umem->cq, rcvd);
1148 xsk->outstanding_tx -= rcvd;
1149 xsk->ring_stats.tx_npkts += rcvd;
1150 }
1151}
1152
1153static inline void complete_tx_only(struct xsk_socket_info *xsk,
1154 int batch_size)
1155{
1156 unsigned int rcvd;
1157 u32 idx;
1158
1159 if (!xsk->outstanding_tx)
1160 return;
1161
1162 if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx)) {
1163 xsk->app_stats.tx_wakeup_sendtos++;
1164 kick_tx(xsk);
1165 }
1166
1167 rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
1168 if (rcvd > 0) {
1169 xsk_ring_cons__release(&xsk->umem->cq, rcvd);
1170 xsk->outstanding_tx -= rcvd;
1171 xsk->ring_stats.tx_npkts += rcvd;
1172 }
1173}
1174
1175static void rx_drop(struct xsk_socket_info *xsk, struct pollfd *fds)
1176{
1177 unsigned int rcvd, i;
1178 u32 idx_rx = 0, idx_fq = 0;
1179 int ret;
1180
1181 rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
1182 if (!rcvd) {
1183 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
1184 xsk->app_stats.rx_empty_polls++;
1185 ret = poll(fds, num_socks, opt_timeout);
1186 }
1187 return;
1188 }
1189
1190 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
1191 while (ret != rcvd) {
1192 if (ret < 0)
1193 exit_with_error(-ret);
1194 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
1195 xsk->app_stats.fill_fail_polls++;
1196 ret = poll(fds, num_socks, opt_timeout);
1197 }
1198 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
1199 }
1200
1201 for (i = 0; i < rcvd; i++) {
1202 u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
1203 u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
1204 u64 orig = xsk_umem__extract_addr(addr);
1205
1206 addr = xsk_umem__add_offset_to_addr(addr);
1207 char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
1208
1209 hex_dump(pkt, len, addr);
1210 *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = orig;
1211 }
1212
1213 xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
1214 xsk_ring_cons__release(&xsk->rx, rcvd);
1215 xsk->ring_stats.rx_npkts += rcvd;
1216}
1217
1218static void rx_drop_all(void)
1219{
1220 struct pollfd fds[MAX_SOCKS] = {};
1221 int i, ret;
1222
1223 for (i = 0; i < num_socks; i++) {
1224 fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
1225 fds[i].events = POLLIN;
1226 }
1227
1228 for (;;) {
1229 if (opt_poll) {
1230 for (i = 0; i < num_socks; i++)
1231 xsks[i]->app_stats.opt_polls++;
1232 ret = poll(fds, num_socks, opt_timeout);
1233 if (ret <= 0)
1234 continue;
1235 }
1236
1237 for (i = 0; i < num_socks; i++)
1238 rx_drop(xsks[i], fds);
1239
1240 if (benchmark_done)
1241 break;
1242 }
1243}
1244
1245static void tx_only(struct xsk_socket_info *xsk, u32 *frame_nb, int batch_size)
1246{
1247 u32 idx;
1248 unsigned int i;
1249
1250 while (xsk_ring_prod__reserve(&xsk->tx, batch_size, &idx) <
1251 batch_size) {
1252 complete_tx_only(xsk, batch_size);
1253 }
1254
1255 for (i = 0; i < batch_size; i++) {
1256 struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx,
1257 idx + i);
1258 tx_desc->addr = (*frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
1259 tx_desc->len = PKT_SIZE;
1260 }
1261
1262 xsk_ring_prod__submit(&xsk->tx, batch_size);
1263 xsk->outstanding_tx += batch_size;
1264 *frame_nb += batch_size;
1265 *frame_nb %= NUM_FRAMES;
1266 complete_tx_only(xsk, batch_size);
1267}
1268
1269static inline int get_batch_size(int pkt_cnt)
1270{
1271 if (!opt_pkt_count)
1272 return opt_batch_size;
1273
1274 if (pkt_cnt + opt_batch_size <= opt_pkt_count)
1275 return opt_batch_size;
1276
1277 return opt_pkt_count - pkt_cnt;
1278}
1279
1280static void complete_tx_only_all(void)
1281{
1282 bool pending;
1283 int i;
1284
1285 do {
1286 pending = false;
1287 for (i = 0; i < num_socks; i++) {
1288 if (xsks[i]->outstanding_tx) {
1289 complete_tx_only(xsks[i], opt_batch_size);
1290 pending = !!xsks[i]->outstanding_tx;
1291 }
1292 }
1293 } while (pending);
1294}
1295
1296static void tx_only_all(void)
1297{
1298 struct pollfd fds[MAX_SOCKS] = {};
1299 u32 frame_nb[MAX_SOCKS] = {};
1300 int pkt_cnt = 0;
1301 int i, ret;
1302
1303 for (i = 0; i < num_socks; i++) {
1304 fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
1305 fds[0].events = POLLOUT;
1306 }
1307
1308 while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
1309 int batch_size = get_batch_size(pkt_cnt);
1310
1311 if (opt_poll) {
1312 for (i = 0; i < num_socks; i++)
1313 xsks[i]->app_stats.opt_polls++;
1314 ret = poll(fds, num_socks, opt_timeout);
1315 if (ret <= 0)
1316 continue;
1317
1318 if (!(fds[0].revents & POLLOUT))
1319 continue;
1320 }
1321
1322 for (i = 0; i < num_socks; i++)
1323 tx_only(xsks[i], &frame_nb[i], batch_size);
1324
1325 pkt_cnt += batch_size;
1326
1327 if (benchmark_done)
1328 break;
1329 }
1330
1331 if (opt_pkt_count)
1332 complete_tx_only_all();
1333}
1334
1335static void l2fwd(struct xsk_socket_info *xsk, struct pollfd *fds)
1336{
1337 unsigned int rcvd, i;
1338 u32 idx_rx = 0, idx_tx = 0;
1339 int ret;
1340
1341 complete_tx_l2fwd(xsk, fds);
1342
1343 rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
1344 if (!rcvd) {
1345 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
1346 xsk->app_stats.rx_empty_polls++;
1347 ret = poll(fds, num_socks, opt_timeout);
1348 }
1349 return;
1350 }
1351
1352 ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
1353 while (ret != rcvd) {
1354 if (ret < 0)
1355 exit_with_error(-ret);
1356 complete_tx_l2fwd(xsk, fds);
1357 if (xsk_ring_prod__needs_wakeup(&xsk->tx)) {
1358 xsk->app_stats.tx_wakeup_sendtos++;
1359 kick_tx(xsk);
1360 }
1361 ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
1362 }
1363
1364 for (i = 0; i < rcvd; i++) {
1365 u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
1366 u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
1367 u64 orig = addr;
1368
1369 addr = xsk_umem__add_offset_to_addr(addr);
1370 char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
1371
1372 swap_mac_addresses(pkt);
1373
1374 hex_dump(pkt, len, addr);
1375 xsk_ring_prod__tx_desc(&xsk->tx, idx_tx)->addr = orig;
1376 xsk_ring_prod__tx_desc(&xsk->tx, idx_tx++)->len = len;
1377 }
1378
1379 xsk_ring_prod__submit(&xsk->tx, rcvd);
1380 xsk_ring_cons__release(&xsk->rx, rcvd);
1381
1382 xsk->ring_stats.rx_npkts += rcvd;
1383 xsk->outstanding_tx += rcvd;
1384}
1385
1386static void l2fwd_all(void)
1387{
1388 struct pollfd fds[MAX_SOCKS] = {};
1389 int i, ret;
1390
1391 for (i = 0; i < num_socks; i++) {
1392 fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
1393 fds[i].events = POLLOUT | POLLIN;
1394 }
1395
1396 for (;;) {
1397 if (opt_poll) {
1398 for (i = 0; i < num_socks; i++)
1399 xsks[i]->app_stats.opt_polls++;
1400 ret = poll(fds, num_socks, opt_timeout);
1401 if (ret <= 0)
1402 continue;
1403 }
1404
1405 for (i = 0; i < num_socks; i++)
1406 l2fwd(xsks[i], fds);
1407
1408 if (benchmark_done)
1409 break;
1410 }
1411}
1412
1413static void load_xdp_program(char **argv, struct bpf_object **obj)
1414{
1415 struct bpf_prog_load_attr prog_load_attr = {
1416 .prog_type = BPF_PROG_TYPE_XDP,
1417 };
1418 char xdp_filename[256];
1419 int prog_fd;
1420
1421 snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
1422 prog_load_attr.file = xdp_filename;
1423
1424 if (bpf_prog_load_xattr(&prog_load_attr, obj, &prog_fd))
1425 exit(EXIT_FAILURE);
1426 if (prog_fd < 0) {
1427 fprintf(stderr, "ERROR: no program found: %s\n",
1428 strerror(prog_fd));
1429 exit(EXIT_FAILURE);
1430 }
1431
1432 if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 0) {
1433 fprintf(stderr, "ERROR: link set xdp fd failed\n");
1434 exit(EXIT_FAILURE);
1435 }
1436}
1437
1438static void enter_xsks_into_map(struct bpf_object *obj)
1439{
1440 struct bpf_map *map;
1441 int i, xsks_map;
1442
1443 map = bpf_object__find_map_by_name(obj, "xsks_map");
1444 xsks_map = bpf_map__fd(map);
1445 if (xsks_map < 0) {
1446 fprintf(stderr, "ERROR: no xsks map found: %s\n",
1447 strerror(xsks_map));
1448 exit(EXIT_FAILURE);
1449 }
1450
1451 for (i = 0; i < num_socks; i++) {
1452 int fd = xsk_socket__fd(xsks[i]->xsk);
1453 int key, ret;
1454
1455 key = i;
1456 ret = bpf_map_update_elem(xsks_map, &key, &fd, 0);
1457 if (ret) {
1458 fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
1459 exit(EXIT_FAILURE);
1460 }
1461 }
1462}
1463
1464int main(int argc, char **argv)
1465{
1466 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
1467 bool rx = false, tx = false;
1468 struct xsk_umem_info *umem;
1469 struct bpf_object *obj;
1470 pthread_t pt;
1471 int i, ret;
1472 void *bufs;
1473
1474 parse_command_line(argc, argv);
1475
1476 if (setrlimit(RLIMIT_MEMLOCK, &r)) {
1477 fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
1478 strerror(errno));
1479 exit(EXIT_FAILURE);
1480 }
1481
1482 if (opt_num_xsks > 1)
1483 load_xdp_program(argv, &obj);
1484
1485
1486 bufs = mmap(NULL, NUM_FRAMES * opt_xsk_frame_size,
1487 PROT_READ | PROT_WRITE,
1488 MAP_PRIVATE | MAP_ANONYMOUS | opt_mmap_flags, -1, 0);
1489 if (bufs == MAP_FAILED) {
1490 printf("ERROR: mmap failed\n");
1491 exit(EXIT_FAILURE);
1492 }
1493
1494
1495 umem = xsk_configure_umem(bufs, NUM_FRAMES * opt_xsk_frame_size);
1496 if (opt_bench == BENCH_RXDROP || opt_bench == BENCH_L2FWD) {
1497 rx = true;
1498 xsk_populate_fill_ring(umem);
1499 }
1500 if (opt_bench == BENCH_L2FWD || opt_bench == BENCH_TXONLY)
1501 tx = true;
1502 for (i = 0; i < opt_num_xsks; i++)
1503 xsks[num_socks++] = xsk_configure_socket(umem, rx, tx);
1504
1505 if (opt_bench == BENCH_TXONLY) {
1506 gen_eth_hdr_data();
1507
1508 for (i = 0; i < NUM_FRAMES; i++)
1509 gen_eth_frame(umem, i * opt_xsk_frame_size);
1510 }
1511
1512 if (opt_num_xsks > 1 && opt_bench != BENCH_TXONLY)
1513 enter_xsks_into_map(obj);
1514
1515 signal(SIGINT, int_exit);
1516 signal(SIGTERM, int_exit);
1517 signal(SIGABRT, int_exit);
1518
1519 setlocale(LC_ALL, "");
1520
1521 if (!opt_quiet) {
1522 ret = pthread_create(&pt, NULL, poller, NULL);
1523 if (ret)
1524 exit_with_error(ret);
1525 }
1526
1527 prev_time = get_nsecs();
1528 start_time = prev_time;
1529
1530 if (opt_bench == BENCH_RXDROP)
1531 rx_drop_all();
1532 else if (opt_bench == BENCH_TXONLY)
1533 tx_only_all();
1534 else
1535 l2fwd_all();
1536
1537 benchmark_done = true;
1538
1539 if (!opt_quiet)
1540 pthread_join(pt, NULL);
1541
1542 xdpsock_cleanup();
1543
1544 return 0;
1545}
1546
