1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Reference program for verifying XDP metadata on real HW. Functional test
4 * only, doesn't test the performance.
5 *
6 * RX:
7 * - UDP 9091 packets are diverted into AF_XDP
8 * - Metadata verified:
9 * - rx_timestamp
10 * - rx_hash
11 *
12 * TX:
13 * - UDP 9091 packets trigger TX reply
14 * - TX HW timestamp is requested and reported back upon completion
15 * - TX checksum is requested
16 */
17
18 #include <test_progs.h>
19 #include <network_helpers.h>
20 #include "xdp_hw_metadata.skel.h"
21 #include "xsk.h"
22
23 #include <error.h>
24 #include <linux/kernel.h>
25 #include <linux/bits.h>
26 #include <linux/bitfield.h>
27 #include <linux/errqueue.h>
28 #include <linux/if_link.h>
29 #include <linux/net_tstamp.h>
30 #include <linux/udp.h>
31 #include <linux/sockios.h>
32 #include <linux/if_xdp.h>
33 #include <sys/mman.h>
34 #include <net/if.h>
35 #include <ctype.h>
36 #include <poll.h>
37 #include <time.h>
38 #include <unistd.h>
39 #include <libgen.h>
40
41 #include "xdp_metadata.h"
42
43 #define UMEM_NUM 256
44 #define UMEM_FRAME_SIZE XSK_UMEM__DEFAULT_FRAME_SIZE
45 #define UMEM_SIZE (UMEM_FRAME_SIZE * UMEM_NUM)
46 #define XDP_FLAGS (XDP_FLAGS_DRV_MODE | XDP_FLAGS_REPLACE)
47
48 struct xsk {
49 void *umem_area;
50 struct xsk_umem *umem;
51 struct xsk_ring_prod fill;
52 struct xsk_ring_cons comp;
53 struct xsk_ring_prod tx;
54 struct xsk_ring_cons rx;
55 struct xsk_socket *socket;
56 };
57
58 struct xdp_hw_metadata *bpf_obj;
59 __u16 bind_flags = XDP_USE_NEED_WAKEUP | XDP_ZEROCOPY;
60 struct xsk *rx_xsk;
61 const char *ifname;
62 int ifindex;
63 int rxq;
64 bool skip_tx;
65 __u64 last_hw_rx_timestamp;
66 __u64 last_xdp_rx_timestamp;
67
68 void test__fail(void) { /* for network_helpers.c */ }
69
70 static int open_xsk(int ifindex, struct xsk *xsk, __u32 queue_id)
71 {
72 int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
73 const struct xsk_socket_config socket_config = {
74 .rx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
75 .tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
76 .bind_flags = bind_flags,
77 };
78 const struct xsk_umem_config umem_config = {
79 .fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
80 .comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
81 .frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
82 .flags = XSK_UMEM__DEFAULT_FLAGS,
83 .tx_metadata_len = sizeof(struct xsk_tx_metadata),
84 };
85 __u32 idx = 0;
86 u64 addr;
87 int ret;
88 int i;
89
90 xsk->umem_area = mmap(NULL, UMEM_SIZE, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
91 if (xsk->umem_area == MAP_FAILED)
92 return -ENOMEM;
93
94 ret = xsk_umem__create(&xsk->umem,
95 xsk->umem_area, UMEM_SIZE,
96 &xsk->fill,
97 &xsk->comp,
98 &umem_config);
99 if (ret)
100 return ret;
101
102 ret = xsk_socket__create(&xsk->socket, ifindex, queue_id,
103 xsk->umem,
104 &xsk->rx,
105 &xsk->tx,
106 &socket_config);
107 if (ret)
108 return ret;
109
110 /* First half of umem is for TX. This way address matches 1-to-1
111 * to the completion queue index.
112 */
113
114 for (i = 0; i < UMEM_NUM / 2; i++) {
115 addr = i * UMEM_FRAME_SIZE;
116 printf("%p: tx_desc[%d] -> %lx\n", xsk, i, addr);
117 }
118
119 /* Second half of umem is for RX. */
120
121 ret = xsk_ring_prod__reserve(&xsk->fill, UMEM_NUM / 2, &idx);
122 for (i = 0; i < UMEM_NUM / 2; i++) {
123 addr = (UMEM_NUM / 2 + i) * UMEM_FRAME_SIZE;
124 printf("%p: rx_desc[%d] -> %lx\n", xsk, i, addr);
125 *xsk_ring_prod__fill_addr(&xsk->fill, idx + i) = addr;
126 }
127 xsk_ring_prod__submit(&xsk->fill, ret);
128
129 return 0;
130 }
131
132 static void close_xsk(struct xsk *xsk)
133 {
134 if (xsk->umem)
135 xsk_umem__delete(xsk->umem);
136 if (xsk->socket)
137 xsk_socket__delete(xsk->socket);
138 munmap(xsk->umem_area, UMEM_SIZE);
139 }
140
141 static void refill_rx(struct xsk *xsk, __u64 addr)
142 {
143 __u32 idx;
144
145 if (xsk_ring_prod__reserve(&xsk->fill, 1, &idx) == 1) {
146 printf("%p: complete rx idx=%u addr=%llx\n", xsk, idx, addr);
147 *xsk_ring_prod__fill_addr(&xsk->fill, idx) = addr;
148 xsk_ring_prod__submit(&xsk->fill, 1);
149 }
150 }
151
152 static int kick_tx(struct xsk *xsk)
153 {
154 return sendto(xsk_socket__fd(xsk->socket), NULL, 0, MSG_DONTWAIT, NULL, 0);
155 }
156
157 static int kick_rx(struct xsk *xsk)
158 {
159 return recvfrom(xsk_socket__fd(xsk->socket), NULL, 0, MSG_DONTWAIT, NULL, NULL);
160 }
161
162 #define NANOSEC_PER_SEC 1000000000 /* 10^9 */
163 static __u64 gettime(clockid_t clock_id)
164 {
165 struct timespec t;
166 int res;
167
168 /* See man clock_gettime(2) for type of clock_id's */
169 res = clock_gettime(clock_id, &t);
170
171 if (res < 0)
172 error(res, errno, "Error with clock_gettime()");
173
174 return (__u64) t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec;
175 }
176
177 static void print_tstamp_delta(const char *name, const char *refname,
178 __u64 tstamp, __u64 reference)
179 {
180 __s64 delta = (__s64)reference - (__s64)tstamp;
181
182 printf("%s: %llu (sec:%0.4f) delta to %s sec:%0.4f (%0.3f usec)\n",
183 name, tstamp, (double)tstamp / NANOSEC_PER_SEC, refname,
184 (double)delta / NANOSEC_PER_SEC,
185 (double)delta / 1000);
186 }
187
188 #define VLAN_PRIO_MASK GENMASK(15, 13) /* Priority Code Point */
189 #define VLAN_DEI_MASK GENMASK(12, 12) /* Drop Eligible Indicator */
190 #define VLAN_VID_MASK GENMASK(11, 0) /* VLAN Identifier */
191 static void print_vlan_tci(__u16 tag)
192 {
193 __u16 vlan_id = FIELD_GET(VLAN_VID_MASK, tag);
194 __u8 pcp = FIELD_GET(VLAN_PRIO_MASK, tag);
195 bool dei = FIELD_GET(VLAN_DEI_MASK, tag);
196
197 printf("PCP=%u, DEI=%d, VID=0x%X\n", pcp, dei, vlan_id);
198 }
199
200 static void verify_xdp_metadata(void *data, clockid_t clock_id)
201 {
202 struct xdp_meta *meta;
203
204 meta = data - sizeof(*meta);
205
206 if (meta->hint_valid & XDP_META_FIELD_RSS)
207 printf("rx_hash: 0x%X with RSS type:0x%X\n",
208 meta->rx_hash, meta->rx_hash_type);
209 else
210 printf("No rx_hash, err=%d\n", meta->rx_hash_err);
211
212 if (meta->hint_valid & XDP_META_FIELD_TS) {
213 __u64 ref_tstamp = gettime(clock_id);
214
215 /* store received timestamps to calculate a delta at tx */
216 last_hw_rx_timestamp = meta->rx_timestamp;
217 last_xdp_rx_timestamp = meta->xdp_timestamp;
218
219 print_tstamp_delta("HW RX-time", "User RX-time",
220 meta->rx_timestamp, ref_tstamp);
221 print_tstamp_delta("XDP RX-time", "User RX-time",
222 meta->xdp_timestamp, ref_tstamp);
223 } else {
224 printf("No rx_timestamp, err=%d\n", meta->rx_timestamp_err);
225 }
226
227 if (meta->hint_valid & XDP_META_FIELD_VLAN_TAG) {
228 printf("rx_vlan_proto: 0x%X\n", ntohs(meta->rx_vlan_proto));
229 printf("rx_vlan_tci: ");
230 print_vlan_tci(meta->rx_vlan_tci);
231 } else {
232 printf("No rx_vlan_tci or rx_vlan_proto, err=%d\n",
233 meta->rx_vlan_tag_err);
234 }
235 }
236
237 static void verify_skb_metadata(int fd)
238 {
239 char cmsg_buf[1024];
240 char packet_buf[128];
241
242 struct scm_timestamping *ts;
243 struct iovec packet_iov;
244 struct cmsghdr *cmsg;
245 struct msghdr hdr;
246
247 memset(&hdr, 0, sizeof(hdr));
248 hdr.msg_iov = &packet_iov;
249 hdr.msg_iovlen = 1;
250 packet_iov.iov_base = packet_buf;
251 packet_iov.iov_len = sizeof(packet_buf);
252
253 hdr.msg_control = cmsg_buf;
254 hdr.msg_controllen = sizeof(cmsg_buf);
255
256 if (recvmsg(fd, &hdr, 0) < 0)
257 error(1, errno, "recvmsg");
258
259 for (cmsg = CMSG_FIRSTHDR(&hdr); cmsg != NULL;
260 cmsg = CMSG_NXTHDR(&hdr, cmsg)) {
261
262 if (cmsg->cmsg_level != SOL_SOCKET)
263 continue;
264
265 switch (cmsg->cmsg_type) {
266 case SCM_TIMESTAMPING:
267 ts = (struct scm_timestamping *)CMSG_DATA(cmsg);
268 if (ts->ts[2].tv_sec || ts->ts[2].tv_nsec) {
269 printf("found skb hwtstamp = %lu.%lu\n",
270 ts->ts[2].tv_sec, ts->ts[2].tv_nsec);
271 return;
272 }
273 break;
274 default:
275 break;
276 }
277 }
278
279 printf("skb hwtstamp is not found!\n");
280 }
281
282 static bool complete_tx(struct xsk *xsk, clockid_t clock_id)
283 {
284 struct xsk_tx_metadata *meta;
285 __u64 addr;
286 void *data;
287 __u32 idx;
288
289 if (!xsk_ring_cons__peek(&xsk->comp, 1, &idx))
290 return false;
291
292 addr = *xsk_ring_cons__comp_addr(&xsk->comp, idx);
293 data = xsk_umem__get_data(xsk->umem_area, addr);
294 meta = data - sizeof(struct xsk_tx_metadata);
295
296 printf("%p: complete tx idx=%u addr=%llx\n", xsk, idx, addr);
297
298 if (meta->completion.tx_timestamp) {
299 __u64 ref_tstamp = gettime(clock_id);
300
301 print_tstamp_delta("HW TX-complete-time", "User TX-complete-time",
302 meta->completion.tx_timestamp, ref_tstamp);
303 print_tstamp_delta("XDP RX-time", "User TX-complete-time",
304 last_xdp_rx_timestamp, ref_tstamp);
305 print_tstamp_delta("HW RX-time", "HW TX-complete-time",
306 last_hw_rx_timestamp, meta->completion.tx_timestamp);
307 } else {
308 printf("No tx_timestamp\n");
309 }
310
311 xsk_ring_cons__release(&xsk->comp, 1);
312
313 return true;
314 }
315
316 #define swap(a, b, len) do { \
317 for (int i = 0; i < len; i++) { \
318 __u8 tmp = ((__u8 *)a)[i]; \
319 ((__u8 *)a)[i] = ((__u8 *)b)[i]; \
320 ((__u8 *)b)[i] = tmp; \
321 } \
322 } while (0)
323
324 static void ping_pong(struct xsk *xsk, void *rx_packet, clockid_t clock_id)
325 {
326 struct xsk_tx_metadata *meta;
327 struct ipv6hdr *ip6h = NULL;
328 struct iphdr *iph = NULL;
329 struct xdp_desc *tx_desc;
330 struct udphdr *udph;
331 struct ethhdr *eth;
332 __sum16 want_csum;
333 void *data;
334 __u32 idx;
335 int ret;
336 int len;
337
338 ret = xsk_ring_prod__reserve(&xsk->tx, 1, &idx);
339 if (ret != 1) {
340 printf("%p: failed to reserve tx slot\n", xsk);
341 return;
342 }
343
344 tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, idx);
345 tx_desc->addr = idx % (UMEM_NUM / 2) * UMEM_FRAME_SIZE + sizeof(struct xsk_tx_metadata);
346 data = xsk_umem__get_data(xsk->umem_area, tx_desc->addr);
347
348 meta = data - sizeof(struct xsk_tx_metadata);
349 memset(meta, 0, sizeof(*meta));
350 meta->flags = XDP_TXMD_FLAGS_TIMESTAMP;
351
352 eth = rx_packet;
353
354 if (eth->h_proto == htons(ETH_P_IP)) {
355 iph = (void *)(eth + 1);
356 udph = (void *)(iph + 1);
357 } else if (eth->h_proto == htons(ETH_P_IPV6)) {
358 ip6h = (void *)(eth + 1);
359 udph = (void *)(ip6h + 1);
360 } else {
361 printf("%p: failed to detect IP version for ping pong %04x\n", xsk, eth->h_proto);
362 xsk_ring_prod__cancel(&xsk->tx, 1);
363 return;
364 }
365
366 len = ETH_HLEN;
367 if (ip6h)
368 len += sizeof(*ip6h) + ntohs(ip6h->payload_len);
369 if (iph)
370 len += ntohs(iph->tot_len);
371
372 swap(eth->h_dest, eth->h_source, ETH_ALEN);
373 if (iph)
374 swap(&iph->saddr, &iph->daddr, 4);
375 else
376 swap(&ip6h->saddr, &ip6h->daddr, 16);
377 swap(&udph->source, &udph->dest, 2);
378
379 want_csum = udph->check;
380 if (ip6h)
381 udph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
382 ntohs(udph->len), IPPROTO_UDP, 0);
383 else
384 udph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
385 ntohs(udph->len), IPPROTO_UDP, 0);
386
387 meta->flags |= XDP_TXMD_FLAGS_CHECKSUM;
388 if (iph)
389 meta->request.csum_start = sizeof(*eth) + sizeof(*iph);
390 else
391 meta->request.csum_start = sizeof(*eth) + sizeof(*ip6h);
392 meta->request.csum_offset = offsetof(struct udphdr, check);
393
394 printf("%p: ping-pong with csum=%04x (want %04x) csum_start=%d csum_offset=%d\n",
395 xsk, ntohs(udph->check), ntohs(want_csum),
396 meta->request.csum_start, meta->request.csum_offset);
397
398 memcpy(data, rx_packet, len); /* don't share umem chunk for simplicity */
399 tx_desc->options |= XDP_TX_METADATA;
400 tx_desc->len = len;
401
402 xsk_ring_prod__submit(&xsk->tx, 1);
403 }
404
405 static int verify_metadata(struct xsk *rx_xsk, int rxq, int server_fd, clockid_t clock_id)
406 {
407 const struct xdp_desc *rx_desc;
408 struct pollfd fds[rxq + 1];
409 __u64 comp_addr;
410 __u64 addr;
411 __u32 idx = 0;
412 int ret;
413 int i;
414
415 for (i = 0; i < rxq; i++) {
416 fds[i].fd = xsk_socket__fd(rx_xsk[i].socket);
417 fds[i].events = POLLIN;
418 fds[i].revents = 0;
419 }
420
421 fds[rxq].fd = server_fd;
422 fds[rxq].events = POLLIN;
423 fds[rxq].revents = 0;
424
425 while (true) {
426 errno = 0;
427
428 for (i = 0; i < rxq; i++) {
429 ret = kick_rx(&rx_xsk[i]);
430 if (ret)
431 printf("kick_rx ret=%d\n", ret);
432 }
433
434 ret = poll(fds, rxq + 1, 1000);
435 printf("poll: %d (%d) skip=%llu fail=%llu redir=%llu\n",
436 ret, errno, bpf_obj->bss->pkts_skip,
437 bpf_obj->bss->pkts_fail, bpf_obj->bss->pkts_redir);
438 if (ret < 0)
439 break;
440 if (ret == 0)
441 continue;
442
443 if (fds[rxq].revents)
444 verify_skb_metadata(server_fd);
445
446 for (i = 0; i < rxq; i++) {
447 bool first_seg = true;
448 bool is_eop = true;
449
450 if (fds[i].revents == 0)
451 continue;
452
453 struct xsk *xsk = &rx_xsk[i];
454 peek:
455 ret = xsk_ring_cons__peek(&xsk->rx, 1, &idx);
456 printf("xsk_ring_cons__peek: %d\n", ret);
457 if (ret != 1)
458 continue;
459
460 rx_desc = xsk_ring_cons__rx_desc(&xsk->rx, idx);
461 comp_addr = xsk_umem__extract_addr(rx_desc->addr);
462 addr = xsk_umem__add_offset_to_addr(rx_desc->addr);
463 is_eop = !(rx_desc->options & XDP_PKT_CONTD);
464 printf("%p: rx_desc[%u]->addr=%llx addr=%llx comp_addr=%llx%s\n",
465 xsk, idx, rx_desc->addr, addr, comp_addr, is_eop ? " EoP" : "");
466 if (first_seg) {
467 verify_xdp_metadata(xsk_umem__get_data(xsk->umem_area, addr),
468 clock_id);
469 first_seg = false;
470
471 if (!skip_tx) {
472 /* mirror first chunk back */
473 ping_pong(xsk, xsk_umem__get_data(xsk->umem_area, addr),
474 clock_id);
475
476 ret = kick_tx(xsk);
477 if (ret)
478 printf("kick_tx ret=%d\n", ret);
479
480 for (int j = 0; j < 500; j++) {
481 if (complete_tx(xsk, clock_id))
482 break;
483 usleep(10);
484 }
485 }
486 }
487
488 xsk_ring_cons__release(&xsk->rx, 1);
489 refill_rx(xsk, comp_addr);
490 if (!is_eop)
491 goto peek;
492 }
493 }
494
495 return 0;
496 }
497
498 static int rxq_num(const char *ifname)
499 {
500 struct ethtool_channels ch = {
501 .cmd = ETHTOOL_GCHANNELS,
502 };
503
504 struct ifreq ifr = {
505 .ifr_data = (void *)&ch,
506 };
507 strncpy(ifr.ifr_name, ifname, IF_NAMESIZE - 1);
508 int fd, ret;
509
510 fd = socket(AF_UNIX, SOCK_DGRAM, 0);
511 if (fd < 0)
512 error(1, errno, "socket");
513
514 ret = ioctl(fd, SIOCETHTOOL, &ifr);
515 if (ret < 0)
516 error(1, errno, "ioctl(SIOCETHTOOL)");
517
518 close(fd);
519
520 return ch.rx_count + ch.combined_count;
521 }
522
523 static void hwtstamp_ioctl(int op, const char *ifname, struct hwtstamp_config *cfg)
524 {
525 struct ifreq ifr = {
526 .ifr_data = (void *)cfg,
527 };
528 strncpy(ifr.ifr_name, ifname, IF_NAMESIZE - 1);
529 int fd, ret;
530
531 fd = socket(AF_UNIX, SOCK_DGRAM, 0);
532 if (fd < 0)
533 error(1, errno, "socket");
534
535 ret = ioctl(fd, op, &ifr);
536 if (ret < 0)
537 error(1, errno, "ioctl(%d)", op);
538
539 close(fd);
540 }
541
542 static struct hwtstamp_config saved_hwtstamp_cfg;
543 static const char *saved_hwtstamp_ifname;
544
545 static void hwtstamp_restore(void)
546 {
547 hwtstamp_ioctl(SIOCSHWTSTAMP, saved_hwtstamp_ifname, &saved_hwtstamp_cfg);
548 }
549
550 static void hwtstamp_enable(const char *ifname)
551 {
552 struct hwtstamp_config cfg = {
553 .rx_filter = HWTSTAMP_FILTER_ALL,
554 };
555
556 hwtstamp_ioctl(SIOCGHWTSTAMP, ifname, &saved_hwtstamp_cfg);
557 saved_hwtstamp_ifname = strdup(ifname);
558 atexit(hwtstamp_restore);
559
560 hwtstamp_ioctl(SIOCSHWTSTAMP, ifname, &cfg);
561 }
562
563 static void cleanup(void)
564 {
565 LIBBPF_OPTS(bpf_xdp_attach_opts, opts);
566 int ret;
567 int i;
568
569 if (bpf_obj) {
570 opts.old_prog_fd = bpf_program__fd(bpf_obj->progs.rx);
571 if (opts.old_prog_fd >= 0) {
572 printf("detaching bpf program....\n");
573 ret = bpf_xdp_detach(ifindex, XDP_FLAGS, &opts);
574 if (ret)
575 printf("failed to detach XDP program: %d\n", ret);
576 }
577 }
578
579 for (i = 0; i < rxq; i++)
580 close_xsk(&rx_xsk[i]);
581
582 if (bpf_obj)
583 xdp_hw_metadata__destroy(bpf_obj);
584
585 free((void *)saved_hwtstamp_ifname);
586 }
587
588 static void handle_signal(int sig)
589 {
590 /* interrupting poll() is all we need */
591 }
592
593 static void timestamping_enable(int fd, int val)
594 {
595 int ret;
596
597 ret = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, &val, sizeof(val));
598 if (ret < 0)
599 error(1, errno, "setsockopt(SO_TIMESTAMPING)");
600 }
601
602 static void print_usage(void)
603 {
604 const char *usage =
605 "Usage: xdp_hw_metadata [OPTIONS] [IFNAME]\n"
606 " -c Run in copy mode (zerocopy is default)\n"
607 " -h Display this help and exit\n\n"
608 " -m Enable multi-buffer XDP for larger MTU\n"
609 " -r Don't generate AF_XDP reply (rx metadata only)\n"
610 "Generate test packets on the other machine with:\n"
611 " echo -n xdp | nc -u -q1 <dst_ip> 9091\n";
612
613 printf("%s", usage);
614 }
615
616 static void read_args(int argc, char *argv[])
617 {
618 int opt;
619
620 while ((opt = getopt(argc, argv, "chmr")) != -1) {
621 switch (opt) {
622 case 'c':
623 bind_flags &= ~XDP_USE_NEED_WAKEUP;
624 bind_flags &= ~XDP_ZEROCOPY;
625 bind_flags |= XDP_COPY;
626 break;
627 case 'h':
628 print_usage();
629 exit(0);
630 case 'm':
631 bind_flags |= XDP_USE_SG;
632 break;
633 case 'r':
634 skip_tx = true;
635 break;
636 case '?':
637 if (isprint(optopt))
638 fprintf(stderr, "Unknown option: -%c\n", optopt);
639 fallthrough;
640 default:
641 print_usage();
642 error(-1, opterr, "Command line options error");
643 }
644 }
645
646 if (optind >= argc) {
647 fprintf(stderr, "No device name provided\n");
648 print_usage();
649 exit(-1);
650 }
651
652 ifname = argv[optind];
653 ifindex = if_nametoindex(ifname);
654
655 if (!ifname)
656 error(-1, errno, "Invalid interface name");
657 }
658
659 int main(int argc, char *argv[])
660 {
661 clockid_t clock_id = CLOCK_TAI;
662 int server_fd = -1;
663 int ret;
664 int i;
665
666 struct bpf_program *prog;
667
668 read_args(argc, argv);
669
670 rxq = rxq_num(ifname);
671
672 printf("rxq: %d\n", rxq);
673
674 hwtstamp_enable(ifname);
675
676 rx_xsk = malloc(sizeof(struct xsk) * rxq);
677 if (!rx_xsk)
678 error(1, ENOMEM, "malloc");
679
680 for (i = 0; i < rxq; i++) {
681 printf("open_xsk(%s, %p, %d)\n", ifname, &rx_xsk[i], i);
682 ret = open_xsk(ifindex, &rx_xsk[i], i);
683 if (ret)
684 error(1, -ret, "open_xsk");
685
686 printf("xsk_socket__fd() -> %d\n", xsk_socket__fd(rx_xsk[i].socket));
687 }
688
689 printf("open bpf program...\n");
690 bpf_obj = xdp_hw_metadata__open();
691 if (libbpf_get_error(bpf_obj))
692 error(1, libbpf_get_error(bpf_obj), "xdp_hw_metadata__open");
693
694 prog = bpf_object__find_program_by_name(bpf_obj->obj, "rx");
695 bpf_program__set_ifindex(prog, ifindex);
696 bpf_program__set_flags(prog, BPF_F_XDP_DEV_BOUND_ONLY);
697
698 printf("load bpf program...\n");
699 ret = xdp_hw_metadata__load(bpf_obj);
700 if (ret)
701 error(1, -ret, "xdp_hw_metadata__load");
702
703 printf("prepare skb endpoint...\n");
704 server_fd = start_server(AF_INET6, SOCK_DGRAM, NULL, 9092, 1000);
705 if (server_fd < 0)
706 error(1, errno, "start_server");
707 timestamping_enable(server_fd,
708 SOF_TIMESTAMPING_SOFTWARE |
709 SOF_TIMESTAMPING_RAW_HARDWARE);
710
711 printf("prepare xsk map...\n");
712 for (i = 0; i < rxq; i++) {
713 int sock_fd = xsk_socket__fd(rx_xsk[i].socket);
714 __u32 queue_id = i;
715
716 printf("map[%d] = %d\n", queue_id, sock_fd);
717 ret = bpf_map_update_elem(bpf_map__fd(bpf_obj->maps.xsk), &queue_id, &sock_fd, 0);
718 if (ret)
719 error(1, -ret, "bpf_map_update_elem");
720 }
721
722 printf("attach bpf program...\n");
723 ret = bpf_xdp_attach(ifindex,
724 bpf_program__fd(bpf_obj->progs.rx),
725 XDP_FLAGS, NULL);
726 if (ret)
727 error(1, -ret, "bpf_xdp_attach");
728
729 signal(SIGINT, handle_signal);
730 ret = verify_metadata(rx_xsk, rxq, server_fd, clock_id);
731 close(server_fd);
732 cleanup();
733 if (ret)
734 error(1, -ret, "verify_metadata");
735 }
736
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