2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/vnet.h>
16 #include <vppinfra/vec.h>
17 #include <vppinfra/format.h>
18 #include <vlib/unix/cj.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/devices/dpdk/dpdk.h>
24 #include "dpdk_priv.h"
25 #include <vppinfra/error.h>
27 #define foreach_dpdk_tx_func_error \
28 _(BAD_RETVAL, "DPDK tx function returned an error") \
29 _(RING_FULL, "Tx packet drops (ring full)") \
30 _(PKT_DROP, "Tx packet drops (dpdk tx failure)") \
31 _(REPL_FAIL, "Tx packet drops (replication failure)")
34 #define _(f,s) DPDK_TX_FUNC_ERROR_##f,
35 foreach_dpdk_tx_func_error
38 } dpdk_tx_func_error_t;
40 static char * dpdk_tx_func_error_strings[] = {
42 foreach_dpdk_tx_func_error
46 static struct rte_mbuf * dpdk_replicate_packet_mb (vlib_buffer_t * b)
48 vlib_main_t * vm = vlib_get_main();
49 vlib_buffer_main_t * bm = vm->buffer_main;
50 struct rte_mbuf * first_mb = 0, * new_mb, * pkt_mb, ** prev_mb_next = 0;
51 u8 nb_segs, nb_segs_left;
53 unsigned socket_id = rte_socket_id();
55 ASSERT (bm->pktmbuf_pools[socket_id]);
56 pkt_mb = ((struct rte_mbuf *)b)-1;
57 nb_segs = pkt_mb->nb_segs;
58 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
60 if (PREDICT_FALSE(pkt_mb == 0))
62 clib_warning ("Missing %d mbuf chain segment(s): "
63 "(nb_segs = %d, nb_segs_left = %d)!",
64 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
66 rte_pktmbuf_free(first_mb);
69 new_mb = rte_pktmbuf_alloc (bm->pktmbuf_pools[socket_id]);
70 if (PREDICT_FALSE(new_mb == 0))
73 rte_pktmbuf_free(first_mb);
78 * Copy packet info into 1st segment.
83 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
84 first_mb->nb_segs = pkt_mb->nb_segs;
85 first_mb->port = pkt_mb->port;
86 #ifdef DAW_FIXME // TX Offload support TBD
87 first_mb->vlan_macip = pkt_mb->vlan_macip;
88 first_mb->hash = pkt_mb->hash;
89 first_mb->ol_flags = pkt_mb->ol_flags
94 ASSERT(prev_mb_next != 0);
95 *prev_mb_next = new_mb;
99 * Copy packet segment data into new mbuf segment.
101 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
102 copy_bytes = pkt_mb->data_len + RTE_PKTMBUF_HEADROOM;
103 ASSERT(copy_bytes <= pkt_mb->buf_len);
104 memcpy(new_mb->buf_addr, pkt_mb->buf_addr, copy_bytes);
106 prev_mb_next = &new_mb->next;
107 pkt_mb = pkt_mb->next;
111 __rte_mbuf_sanity_check(first_mb, 1);
121 /* Copy of VLIB buffer; packet data stored in pre_data. */
122 vlib_buffer_t buffer;
123 } dpdk_tx_dma_trace_t;
126 dpdk_tx_trace_buffer (dpdk_main_t * dm,
127 vlib_node_runtime_t * node,
131 vlib_buffer_t * buffer)
133 vlib_main_t * vm = vlib_get_main();
134 dpdk_tx_dma_trace_t * t0;
135 struct rte_mbuf * mb;
137 mb = ((struct rte_mbuf *)buffer)-1;
139 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
140 t0->queue_index = queue_id;
141 t0->device_index = xd->device_index;
142 t0->buffer_index = buffer_index;
143 memcpy (&t0->mb, mb, sizeof (t0->mb));
144 memcpy (&t0->buffer, buffer, sizeof (buffer[0]) - sizeof (buffer->pre_data));
145 memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
146 sizeof (t0->buffer.pre_data));
150 * This function calls the dpdk's tx_burst function to transmit the packets
151 * on the tx_vector. It manages a lock per-device if the device does not
152 * support multiple queues. It returns the number of packets untransmitted
153 * on the tx_vector. If all packets are transmitted (the normal case), the
154 * function returns 0.
156 * The tx_burst function may not be able to transmit all packets because the
157 * dpdk ring is full. If a flowcontrol callback function has been configured
158 * then the function simply returns. If no callback has been configured, the
159 * function will retry calling tx_burst with the remaining packets. This will
160 * continue until all packets are transmitted or tx_burst indicates no packets
161 * could be transmitted. (The caller can drop the remaining packets.)
163 * The function assumes there is at least one packet on the tx_vector.
166 u32 tx_burst_vector_internal (vlib_main_t * vm,
168 struct rte_mbuf ** tx_vector)
170 dpdk_main_t * dm = &dpdk_main;
179 ring = vec_header(tx_vector, sizeof(*ring));
181 n_packets = ring->tx_head - ring->tx_tail;
183 tx_head = ring->tx_head % DPDK_TX_RING_SIZE;
186 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
187 * unpredictable results.
189 ASSERT(n_packets > 0);
192 * Check for tx_vector overflow. If this fails it is a system configuration
193 * error. The ring should be sized big enough to handle the largest un-flowed
194 * off burst from a traffic manager. A larger size also helps performance
195 * a bit because it decreases the probability of having to issue two tx_burst
196 * calls due to a ring wrap.
198 ASSERT(n_packets < DPDK_TX_RING_SIZE);
201 * If there is no flowcontrol callback, there is only temporary buffering
202 * on the tx_vector and so the tail should always be 0.
204 ASSERT(dm->flowcontrol_callback || ring->tx_tail == 0);
207 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
208 * Apply backpressure instead. If there is no callback, keep retrying until
209 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
212 n_retry = dm->flowcontrol_callback ? 0 : 255;
214 queue_id = vm->cpu_index;
217 /* start the burst at the tail */
218 tx_tail = ring->tx_tail % DPDK_TX_RING_SIZE;
221 * This device only supports one TX queue,
222 * and we're running multi-threaded...
224 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
227 queue_id = queue_id % xd->tx_q_used;
228 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
230 queue_id = (queue_id + 1) % xd->tx_q_used;
233 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
235 if (PREDICT_TRUE(tx_head > tx_tail))
237 /* no wrap, transmit in one burst */
238 rv = rte_eth_tx_burst(xd->device_index,
241 (uint16_t) (tx_head-tx_tail));
246 * This can only happen if there is a flowcontrol callback.
247 * We need to split the transmit into two calls: one for
248 * the packets up to the wrap point, and one to continue
249 * at the start of the ring.
250 * Transmit pkts up to the wrap point.
252 rv = rte_eth_tx_burst(xd->device_index,
255 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
258 * If we transmitted everything we wanted, then allow 1 retry
259 * so we can try to transmit the rest. If we didn't transmit
260 * everything, stop now.
262 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
265 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
268 if (xd->need_txlock) {
270 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1));
272 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
274 dpdk_device_and_queue_t * dq;
275 vec_foreach (dq, dm->devices_by_cpu[vm->cpu_index])
277 if (xd->device_index == dq->device)
281 offset = dq->queue_id * VIRTIO_QNUM;
284 if (PREDICT_TRUE(tx_head > tx_tail))
286 /* no wrap, transmit in one burst */
287 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
289 (uint16_t) (tx_head-tx_tail));
290 if (PREDICT_TRUE(rv > 0))
292 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
293 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
294 vring->n_since_last_int += rv;
296 f64 now = vlib_time_now (vm);
297 if (vring->int_deadline < now ||
298 vring->n_since_last_int > dm->vhost_coalesce_frames)
299 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
304 rte_pktmbuf_free (tx_vector[tx_tail+c]);
310 * If we transmitted everything we wanted, then allow 1 retry
311 * so we can try to transmit the rest. If we didn't transmit
312 * everything, stop now.
314 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
316 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
318 if (PREDICT_TRUE(rv > 0))
320 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
321 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
322 vring->n_since_last_int += rv;
324 f64 now = vlib_time_now (vm);
325 if (vring->int_deadline < now ||
326 vring->n_since_last_int > dm->vhost_coalesce_frames)
327 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
332 rte_pktmbuf_free (tx_vector[tx_tail+c]);
335 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
339 *xd->lockp[queue_id] = 0;
342 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
344 if (PREDICT_TRUE(tx_head > tx_tail))
346 /* no wrap, transmit in one burst */
347 rv = rte_kni_tx_burst(xd->kni,
349 (uint16_t) (tx_head-tx_tail));
354 * This can only happen if there is a flowcontrol callback.
355 * We need to split the transmit into two calls: one for
356 * the packets up to the wrap point, and one to continue
357 * at the start of the ring.
358 * Transmit pkts up to the wrap point.
360 rv = rte_kni_tx_burst(xd->kni,
362 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
365 * If we transmitted everything we wanted, then allow 1 retry
366 * so we can try to transmit the rest. If we didn't transmit
367 * everything, stop now.
369 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
379 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
381 *xd->lockp[queue_id] = 0;
383 if (PREDICT_FALSE(rv < 0))
385 // emit non-fatal message, bump counter
386 vnet_main_t * vnm = dm->vnet_main;
387 vnet_interface_main_t * im = &vnm->interface_main;
390 node_index = vec_elt_at_index(im->hw_interfaces,
391 xd->vlib_hw_if_index)->tx_node_index;
393 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
394 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index, rv);
395 return n_packets; // untransmitted packets
397 ring->tx_tail += (u16)rv;
398 n_packets -= (uint16_t) rv;
399 } while (rv && n_packets && (n_retry>0));
406 * This function transmits any packets on the interface's tx_vector and returns
407 * the number of packets untransmitted on the tx_vector. If the tx_vector is
408 * empty the function simply returns 0.
410 * It is intended to be called by a traffic manager which has flowed-off an
411 * interface to see if the interface can be flowed-on again.
413 u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
415 dpdk_main_t * dm = &dpdk_main;
418 struct rte_mbuf ** tx_vector;
421 /* param is dev_instance and not hw_if_index to save another lookup */
422 xd = vec_elt_at_index (dm->devices, dev_instance);
424 queue_id = vm->cpu_index;
425 tx_vector = xd->tx_vectors[queue_id];
427 /* If no packets on the ring, don't bother calling tx function */
428 ring = vec_header(tx_vector, sizeof(*ring));
429 if (ring->tx_head == ring->tx_tail)
434 return tx_burst_vector_internal (vm, xd, tx_vector);
438 * Transmits the packets on the frame to the interface associated with the
439 * node. It first copies packets on the frame to a tx_vector containing the
440 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
441 * which calls the dpdk tx_burst function.
443 * The tx_vector is treated slightly differently depending on whether or
444 * not a flowcontrol callback function has been configured. If there is no
445 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
446 * Its entries are written and consumed before the function exits.
448 * If there is a callback then the transmit is being invoked in the presence
449 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
450 * pointers. If not all packets can be transmitted, the untransmitted packets
451 * stay on the tx_vector until the next call. The callback allows the traffic
452 * manager to flow-off dequeues to the interface. The companion function
453 * dpdk_interface_tx_vector() allows the traffic manager to detect when
454 * it should flow-on the interface again.
457 dpdk_interface_tx (vlib_main_t * vm,
458 vlib_node_runtime_t * node,
461 dpdk_main_t * dm = &dpdk_main;
462 vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
463 dpdk_device_t * xd = vec_elt_at_index (dm->devices, rd->dev_instance);
464 u32 n_packets = f->n_vectors;
467 struct rte_mbuf ** tx_vector;
475 my_cpu = vm->cpu_index;
479 tx_vector = xd->tx_vectors[queue_id];
480 ring = vec_header(tx_vector, sizeof(*ring));
482 n_on_ring = ring->tx_head - ring->tx_tail;
483 from = vlib_frame_vector_args (f);
485 ASSERT(n_packets <= VLIB_FRAME_SIZE);
487 if (PREDICT_FALSE(n_on_ring + n_packets > DPDK_TX_RING_SIZE))
490 * Overflowing the ring should never happen.
491 * If it does then drop the whole frame.
493 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
498 u32 bi0 = from[n_packets];
499 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
500 struct rte_mbuf *mb0 = ((struct rte_mbuf *)b0) - 1;
501 rte_pktmbuf_free (mb0);
506 if (PREDICT_FALSE(dm->tx_pcap_enable))
512 vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
513 if (dm->pcap_sw_if_index == 0 ||
514 dm->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_TX])
515 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
521 from = vlib_frame_vector_args (f);
523 i = ring->tx_head % DPDK_TX_RING_SIZE;
529 struct rte_mbuf * mb0, * mb1;
530 struct rte_mbuf * prefmb0, * prefmb1;
531 vlib_buffer_t * b0, * b1;
532 vlib_buffer_t * pref0, * pref1;
534 u16 new_data_len0, new_data_len1;
535 u16 new_pkt_len0, new_pkt_len1;
540 pref0 = vlib_get_buffer (vm, pi0);
541 pref1 = vlib_get_buffer (vm, pi1);
543 prefmb0 = ((struct rte_mbuf *)pref0) - 1;
544 prefmb1 = ((struct rte_mbuf *)pref1) - 1;
546 CLIB_PREFETCH(prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
547 CLIB_PREFETCH(pref0, CLIB_CACHE_LINE_BYTES, LOAD);
548 CLIB_PREFETCH(prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
549 CLIB_PREFETCH(pref1, CLIB_CACHE_LINE_BYTES, LOAD);
555 b0 = vlib_get_buffer (vm, bi0);
556 b1 = vlib_get_buffer (vm, bi1);
558 mb0 = ((struct rte_mbuf *)b0) - 1;
559 mb1 = ((struct rte_mbuf *)b1) - 1;
561 any_clone = b0->clone_count | b1->clone_count;
562 if (PREDICT_FALSE(any_clone != 0))
564 if (PREDICT_FALSE(b0->clone_count != 0))
566 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
567 if (PREDICT_FALSE(mb0_new == 0))
569 vlib_error_count (vm, node->node_index,
570 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
571 b0->flags |= VLIB_BUFFER_REPL_FAIL;
575 vec_add1 (dm->recycle[my_cpu], bi0);
577 if (PREDICT_FALSE(b1->clone_count != 0))
579 struct rte_mbuf * mb1_new = dpdk_replicate_packet_mb (b1);
580 if (PREDICT_FALSE(mb1_new == 0))
582 vlib_error_count (vm, node->node_index,
583 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
584 b1->flags |= VLIB_BUFFER_REPL_FAIL;
588 vec_add1 (dm->recycle[my_cpu], bi1);
592 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
593 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
594 delta1 = PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
595 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
597 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
598 new_data_len1 = (u16)((i16) mb1->data_len + delta1);
599 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
600 new_pkt_len1 = (u16)((i16) mb1->pkt_len + delta1);
602 b0->current_length = new_data_len0;
603 b1->current_length = new_data_len1;
604 mb0->data_len = new_data_len0;
605 mb1->data_len = new_data_len1;
606 mb0->pkt_len = new_pkt_len0;
607 mb1->pkt_len = new_pkt_len1;
609 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
610 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
611 mb1->data_off = (PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
612 mb1->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b1->current_data);
614 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
616 if (b0->flags & VLIB_BUFFER_IS_TRACED)
617 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
618 if (b1->flags & VLIB_BUFFER_IS_TRACED)
619 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
622 if (PREDICT_TRUE(any_clone == 0))
624 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
626 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
631 /* cloning was done, need to check for failure */
632 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
634 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
637 if (PREDICT_TRUE((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
639 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
649 struct rte_mbuf * mb0;
658 b0 = vlib_get_buffer (vm, bi0);
660 mb0 = ((struct rte_mbuf *)b0) - 1;
661 if (PREDICT_FALSE(b0->clone_count != 0))
663 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
664 if (PREDICT_FALSE(mb0_new == 0))
666 vlib_error_count (vm, node->node_index,
667 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
668 b0->flags |= VLIB_BUFFER_REPL_FAIL;
672 vec_add1 (dm->recycle[my_cpu], bi0);
675 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
676 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
678 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
679 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
681 b0->current_length = new_data_len0;
682 mb0->data_len = new_data_len0;
683 mb0->pkt_len = new_pkt_len0;
684 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
685 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
687 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
688 if (b0->flags & VLIB_BUFFER_IS_TRACED)
689 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
691 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
693 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
699 /* account for additional packets in the ring */
700 ring->tx_head += n_packets;
701 n_on_ring = ring->tx_head - ring->tx_tail;
703 /* transmit as many packets as possible */
704 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
707 * tx_pkts is the number of packets successfully transmitted
708 * This is the number originally on ring minus the number remaining on ring
710 tx_pkts = n_on_ring - n_packets;
712 if (PREDICT_FALSE(dm->flowcontrol_callback != 0))
714 if (PREDICT_FALSE(n_packets))
716 /* Callback may want to enable flowcontrol */
717 dm->flowcontrol_callback(vm, xd->vlib_hw_if_index, ring->tx_head - ring->tx_tail);
721 /* Reset head/tail to avoid unnecessary wrap */
728 /* If there is no callback then drop any non-transmitted packets */
729 if (PREDICT_FALSE(n_packets))
731 vlib_simple_counter_main_t * cm;
732 vnet_main_t * vnm = vnet_get_main();
734 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
735 VNET_INTERFACE_COUNTER_TX_ERROR);
737 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index, n_packets);
739 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
743 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
746 /* Reset head/tail to avoid unnecessary wrap */
751 /* Recycle replicated buffers */
752 if (PREDICT_FALSE(vec_len(dm->recycle[my_cpu])))
754 vlib_buffer_free (vm, dm->recycle[my_cpu], vec_len(dm->recycle[my_cpu]));
755 _vec_len(dm->recycle[my_cpu]) = 0;
758 ASSERT(ring->tx_head >= ring->tx_tail);
763 static int dpdk_device_renumber (vnet_hw_interface_t * hi,
764 u32 new_dev_instance)
766 dpdk_main_t * dm = &dpdk_main;
767 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
769 if (!xd || xd->dev_type != VNET_DPDK_DEV_VHOST_USER) {
770 clib_warning("cannot renumber non-vhost-user interface (sw_if_index: %d)",
775 xd->vu_if_id = new_dev_instance;
779 static u8 * format_dpdk_device_name (u8 * s, va_list * args)
781 dpdk_main_t * dm = &dpdk_main;
782 char *devname_format;
784 u32 i = va_arg (*args, u32);
785 struct rte_eth_dev_info dev_info;
788 if (dm->interface_name_format_decimal)
789 devname_format = "%s%d/%d/%d";
791 devname_format = "%s%x/%x/%x";
793 #ifdef RTE_LIBRTE_KNI
794 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
795 return format(s, "kni%d", dm->devices[i].kni_port_id);
798 if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
799 return format(s, "VirtualEthernet0/0/%d", dm->devices[i].vu_if_id);
801 switch (dm->devices[i].port_type)
803 case VNET_DPDK_PORT_TYPE_ETH_1G:
804 device_name = "GigabitEthernet";
807 case VNET_DPDK_PORT_TYPE_ETH_10G:
808 device_name = "TenGigabitEthernet";
811 case VNET_DPDK_PORT_TYPE_ETH_40G:
812 device_name = "FortyGigabitEthernet";
815 case VNET_DPDK_PORT_TYPE_ETH_BOND:
816 return format(s, "BondEthernet%d", dm->devices[i].device_index);
818 case VNET_DPDK_PORT_TYPE_ETH_SWITCH:
819 device_name = "EthernetSwitch";
823 case VNET_DPDK_PORT_TYPE_NETMAP:
824 rte_eth_dev_info_get(i, &dev_info);
825 return format(s, "netmap:%s", dev_info.driver_name);
828 case VNET_DPDK_PORT_TYPE_AF_PACKET:
829 rte_eth_dev_info_get(i, &dev_info);
830 return format(s, "af_packet%d", dm->devices[i].af_packet_port_id);
833 case VNET_DPDK_PORT_TYPE_UNKNOWN:
834 device_name = "UnknownEthernet";
838 rte_eth_dev_info_get(i, &dev_info);
839 ret = format (s, devname_format, device_name, dev_info.pci_dev->addr.bus,
840 dev_info.pci_dev->addr.devid,
841 dev_info.pci_dev->addr.function);
843 /* address Chelsio cards which share PCI address */
844 if (dm->devices[i].pmd == VNET_DPDK_PMD_CXGBE) {
845 struct rte_eth_dev_info di;
848 rte_eth_dev_info_get(i+1, &di);
849 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
850 sizeof(struct rte_pci_addr)) == 0)
851 return format(ret, "/0");
854 rte_eth_dev_info_get(i-1, &di);
855 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
856 sizeof(struct rte_pci_addr)) == 0)
857 return format(ret, "/1");
862 static u8 * format_dpdk_device_type (u8 * s, va_list * args)
864 dpdk_main_t * dm = &dpdk_main;
866 u32 i = va_arg (*args, u32);
868 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
869 return format(s, "Kernel NIC Interface");
870 } else if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
871 return format(s, "vhost-user interface");
874 switch (dm->devices[i].pmd)
876 case VNET_DPDK_PMD_E1000EM:
877 dev_type = "Intel 82540EM (e1000)";
880 case VNET_DPDK_PMD_IGB:
881 dev_type = "Intel e1000";
884 case VNET_DPDK_PMD_I40E:
885 dev_type = "Intel X710/XL710 Family";
888 case VNET_DPDK_PMD_I40EVF:
889 dev_type = "Intel X710/XL710 Family VF";
892 case VNET_DPDK_PMD_FM10K:
893 dev_type = "Intel FM10000 Family Ethernet Switch";
896 case VNET_DPDK_PMD_IGBVF:
897 dev_type = "Intel e1000 VF";
900 case VNET_DPDK_PMD_VIRTIO:
901 dev_type = "Red Hat Virtio";
904 case VNET_DPDK_PMD_IXGBEVF:
905 dev_type = "Intel 82599 VF";
908 case VNET_DPDK_PMD_IXGBE:
909 dev_type = "Intel 82599";
912 case VNET_DPDK_PMD_VICE:
913 case VNET_DPDK_PMD_ENIC:
914 dev_type = "Cisco VIC";
917 case VNET_DPDK_PMD_CXGBE:
918 dev_type = "Chelsio T4/T5";
921 case VNET_DPDK_PMD_VMXNET3:
922 dev_type = "VMware VMXNET3";
926 case VNET_DPDK_PMD_NETMAP:
927 dev_type = "Netmap/Vale";
931 case VNET_DPDK_PMD_AF_PACKET:
932 dev_type = "af_packet";
935 case VNET_DPDK_PMD_BOND:
936 dev_type = "Ethernet Bonding";
940 case VNET_DPDK_PMD_UNKNOWN:
941 dev_type = "### UNKNOWN ###";
945 return format (s, dev_type);
948 static u8 * format_dpdk_link_status (u8 * s, va_list * args)
950 dpdk_device_t * xd = va_arg (*args, dpdk_device_t *);
951 struct rte_eth_link * l = &xd->link;
952 vnet_main_t * vnm = vnet_get_main();
953 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
955 s = format (s, "%s ", l->link_status ? "up" : "down");
958 u32 promisc = rte_eth_promiscuous_get (xd->device_index);
960 s = format (s, "%s duplex ", (l->link_duplex == ETH_LINK_FULL_DUPLEX) ?
962 s = format (s, "speed %u mtu %d %s\n", l->link_speed,
963 hi->max_packet_bytes, promisc ? " promisc" : "");
966 s = format (s, "\n");
974 if (format_get_indent (s) > next_split ) { \
975 next_split += _line_len; \
976 s = format(s,"\n%U", format_white_space, indent); \
978 s = format(s, "%s ", str); \
981 static u8 * format_dpdk_rss_hf_name(u8 * s, va_list * args)
983 u64 bitmap = va_arg (*args, u64);
984 int next_split = _line_len;
985 int indent = format_get_indent (s);
988 return format(s, "none");
995 static u8 * format_dpdk_rx_offload_caps(u8 * s, va_list * args)
997 u32 bitmap = va_arg (*args, u32);
998 int next_split = _line_len;
999 int indent = format_get_indent (s);
1002 return format(s, "none");
1004 foreach_dpdk_rx_offload_caps
1009 static u8 * format_dpdk_tx_offload_caps(u8 * s, va_list * args)
1011 u32 bitmap = va_arg (*args, u32);
1012 int next_split = _line_len;
1013 int indent = format_get_indent (s);
1015 return format(s, "none");
1017 foreach_dpdk_tx_offload_caps
1025 static u8 * format_dpdk_device (u8 * s, va_list * args)
1027 u32 dev_instance = va_arg (*args, u32);
1028 int verbose = va_arg (*args, int);
1029 dpdk_main_t * dm = &dpdk_main;
1030 dpdk_device_t * xd = vec_elt_at_index (dm->devices, dev_instance);
1031 uword indent = format_get_indent (s);
1032 f64 now = vlib_time_now (dm->vlib_main);
1034 dpdk_update_counters (xd, now);
1035 dpdk_update_link_state (xd, now);
1037 s = format (s, "%U\n%Ucarrier %U",
1038 format_dpdk_device_type, xd->device_index,
1039 format_white_space, indent + 2,
1040 format_dpdk_link_status, xd);
1042 if (verbose > 1 && xd->dev_type == VNET_DPDK_DEV_ETH)
1044 struct rte_eth_dev_info di;
1045 struct rte_pci_device * pci;
1046 struct rte_eth_rss_conf rss_conf;
1049 rss_conf.rss_key = 0;
1050 rte_eth_dev_info_get(xd->device_index, &di);
1051 rte_eth_dev_rss_hash_conf_get(xd->device_index, &rss_conf);
1055 s = format(s, "%Upci id: device %04x:%04x subsystem %04x:%04x\n"
1056 "%Upci address: %04x:%02x:%02x.%02x\n",
1057 format_white_space, indent + 2,
1058 pci->id.vendor_id, pci->id.device_id,
1059 pci->id.subsystem_vendor_id,
1060 pci->id.subsystem_device_id,
1061 format_white_space, indent + 2,
1062 pci->addr.domain, pci->addr.bus,
1063 pci->addr.devid, pci->addr.function);
1064 s = format(s, "%Umax rx packet len: %d\n",
1065 format_white_space, indent + 2, di.max_rx_pktlen);
1066 s = format(s, "%Upromiscuous: unicast %s all-multicast %s\n",
1067 format_white_space, indent + 2,
1068 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off",
1069 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off");
1070 vlan_off = rte_eth_dev_get_vlan_offload(xd->device_index);
1071 s = format(s, "%Uvlan offload: strip %s filter %s qinq %s\n",
1072 format_white_space, indent + 2,
1073 vlan_off & ETH_VLAN_STRIP_OFFLOAD ? "on" : "off",
1074 vlan_off & ETH_VLAN_FILTER_OFFLOAD ? "on" : "off",
1075 vlan_off & ETH_VLAN_EXTEND_OFFLOAD ? "on" : "off");
1076 s = format(s, "%Uqueue size (max): rx %d (%d) tx %d (%d)\n",
1077 format_white_space, indent + 2,
1078 xd->rx_q_used, di.max_rx_queues,
1079 xd->tx_q_used, di.max_tx_queues);
1080 s = format(s, "%Urx offload caps: %U\n",
1081 format_white_space, indent + 2,
1082 format_dpdk_rx_offload_caps, di.rx_offload_capa);
1083 s = format(s, "%Utx offload caps: %U\n",
1084 format_white_space, indent + 2,
1085 format_dpdk_tx_offload_caps, di.tx_offload_capa);
1086 s = format(s, "%Urss active: %U\n"
1087 "%Urss supported: %U\n",
1088 format_white_space, indent + 2,
1089 format_dpdk_rss_hf_name, rss_conf.rss_hf,
1090 format_white_space, indent + 2,
1091 format_dpdk_rss_hf_name, di.flow_type_rss_offloads);
1094 if (xd->cpu_socket > -1)
1095 s = format (s, "%Ucpu socket %d",
1096 format_white_space, indent + 2,
1099 /* $$$ MIB counters */
1103 if (xd->stats.V != 0) \
1104 s = format (s, "\n%U%-40U%16Ld", \
1105 format_white_space, indent + 2, \
1106 format_c_identifier, #N, xd->stats.V);
1108 foreach_dpdk_counter
1113 struct rte_eth_xstats * xstat;
1115 vec_foreach(xstat, xd->xstats)
1119 /* format_c_identifier don't like c strings inside vector */
1120 u8 * name = format(0,"%s", xstat->name);
1121 xs = format(xs, "\n%U%-38U%16Ld",
1122 format_white_space, indent + 4,
1123 format_c_identifier, name, xstat->value);
1130 s = format(s, "\n%Uextended stats:%v",
1131 format_white_space, indent + 2, xs);
1138 static u8 * format_dpdk_tx_dma_trace (u8 * s, va_list * va)
1140 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
1141 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
1142 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main();
1143 dpdk_tx_dma_trace_t * t = va_arg (*va, dpdk_tx_dma_trace_t *);
1144 dpdk_main_t * dm = &dpdk_main;
1145 dpdk_device_t * xd = vec_elt_at_index (dm->devices, t->device_index);
1146 uword indent = format_get_indent (s);
1147 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, xd->vlib_sw_if_index);
1149 s = format (s, "%U tx queue %d",
1150 format_vnet_sw_interface_name, vnm, sw,
1153 s = format (s, "\n%Ubuffer 0x%x: %U",
1154 format_white_space, indent,
1156 format_vlib_buffer, &t->buffer);
1158 s = format (s, "\n%U%U", format_white_space, indent,
1159 format_ethernet_header_with_length, t->buffer.pre_data,
1160 sizeof (t->buffer.pre_data));
1165 static void dpdk_clear_hw_interface_counters (u32 instance)
1167 dpdk_main_t * dm = &dpdk_main;
1168 dpdk_device_t * xd = vec_elt_at_index (dm->devices, instance);
1171 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1172 * therefore fake the stop in the dpdk driver by
1173 * silently dropping all of the incoming pkts instead of
1174 * stopping the driver / hardware.
1176 if (xd->admin_up != 0xff)
1178 rte_eth_stats_reset (xd->device_index);
1179 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1180 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
1184 rte_eth_stats_reset (xd->device_index);
1185 memset(&xd->stats, 0, sizeof(xd->stats));
1186 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1188 rte_eth_xstats_reset(xd->device_index);
1191 #ifdef RTE_LIBRTE_KNI
1193 kni_config_network_if(u8 port_id, u8 if_up)
1195 vnet_main_t * vnm = vnet_get_main();
1196 dpdk_main_t * dm = &dpdk_main;
1200 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1202 clib_warning("unknown interface");
1205 xd = vec_elt_at_index (dm->devices, p[0]);
1208 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1209 if_up ? VNET_HW_INTERFACE_FLAG_LINK_UP |
1210 ETH_LINK_FULL_DUPLEX : 0);
1215 kni_change_mtu(u8 port_id, unsigned new_mtu)
1217 vnet_main_t * vnm = vnet_get_main();
1218 dpdk_main_t * dm = &dpdk_main;
1221 vnet_hw_interface_t * hif;
1223 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1225 clib_warning("unknown interface");
1228 xd = vec_elt_at_index (dm->devices, p[0]);
1230 hif = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
1232 hif->max_packet_bytes = new_mtu;
1238 static clib_error_t *
1239 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
1241 vnet_hw_interface_t * hif = vnet_get_hw_interface (vnm, hw_if_index);
1242 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1243 dpdk_main_t * dm = &dpdk_main;
1244 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hif->dev_instance);
1247 #ifdef RTE_LIBRTE_KNI
1248 if (xd->dev_type == VNET_DPDK_DEV_KNI)
1252 struct rte_kni_conf conf;
1253 struct rte_kni_ops ops;
1254 vlib_main_t * vm = vlib_get_main();
1255 vlib_buffer_main_t * bm = vm->buffer_main;
1256 memset(&conf, 0, sizeof(conf));
1257 snprintf(conf.name, RTE_KNI_NAMESIZE, "vpp%u", xd->kni_port_id);
1258 conf.mbuf_size = MBUF_SIZE;
1259 memset(&ops, 0, sizeof(ops));
1260 ops.port_id = xd->kni_port_id;
1261 ops.change_mtu = kni_change_mtu;
1262 ops.config_network_if = kni_config_network_if;
1264 xd->kni = rte_kni_alloc(bm->pktmbuf_pools[rte_socket_id()], &conf, &ops);
1267 clib_warning("failed to allocate kni interface");
1271 hif->max_packet_bytes = 1500; /* kni interface default value */
1278 rte_kni_release(xd->kni);
1283 if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
1287 if (xd->vu_is_running)
1288 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1289 VNET_HW_INTERFACE_FLAG_LINK_UP |
1290 ETH_LINK_FULL_DUPLEX );
1295 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1305 f64 now = vlib_time_now (dm->vlib_main);
1308 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1309 * therefore fake the stop in the dpdk driver by
1310 * silently dropping all of the incoming pkts instead of
1311 * stopping the driver / hardware.
1313 if (xd->admin_up == 0)
1314 rv = rte_eth_dev_start (xd->device_index);
1317 rte_eth_promiscuous_enable(xd->device_index);
1319 rte_eth_promiscuous_disable(xd->device_index);
1321 rte_eth_allmulticast_enable (xd->device_index);
1323 dpdk_update_counters (xd, now);
1324 dpdk_update_link_state (xd, now);
1328 rte_eth_allmulticast_disable (xd->device_index);
1329 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1332 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1333 * therefore fake the stop in the dpdk driver by
1334 * silently dropping all of the incoming pkts instead of
1335 * stopping the driver / hardware.
1337 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
1339 rte_eth_dev_stop (xd->device_index);
1347 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop",
1350 return /* no error */ 0;
1354 * Dynamically redirect all pkts from a specific interface
1355 * to the specified node
1357 static void dpdk_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
1360 dpdk_main_t * xm = &dpdk_main;
1361 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1362 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1364 /* Shut off redirection */
1365 if (node_index == ~0)
1367 xd->per_interface_next_index = node_index;
1371 xd->per_interface_next_index =
1372 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
1376 static clib_error_t *
1377 dpdk_subif_add_del_function (vnet_main_t * vnm,
1379 struct vnet_sw_interface_t * st,
1382 dpdk_main_t * xm = &dpdk_main;
1383 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1384 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1385 vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
1386 int r, vlan_offload;
1389 if (xd->dev_type != VNET_DPDK_DEV_ETH)
1391 /* currently we program VLANS only for IXGBE VF */
1392 if (xd->pmd != VNET_DPDK_PMD_IXGBEVF)
1395 if (t->sub.eth.flags.no_tags == 1)
1398 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
1399 return clib_error_return (0, "unsupported VLAN setup");
1402 vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
1403 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
1405 if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
1406 return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
1407 xd->device_index, r);
1410 if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
1411 return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
1412 xd->device_index, r);
1417 VNET_DEVICE_CLASS (dpdk_device_class) = {
1419 .tx_function = dpdk_interface_tx,
1420 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
1421 .tx_function_error_strings = dpdk_tx_func_error_strings,
1422 .format_device_name = format_dpdk_device_name,
1423 .format_device = format_dpdk_device,
1424 .format_tx_trace = format_dpdk_tx_dma_trace,
1425 .clear_counters = dpdk_clear_hw_interface_counters,
1426 .admin_up_down_function = dpdk_interface_admin_up_down,
1427 .subif_add_del_function = dpdk_subif_add_del_function,
1428 .rx_redirect_to_node = dpdk_set_interface_next_node,
1429 .no_flatten_output_chains = 1,
1430 .name_renumber = dpdk_device_renumber,
1433 void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
1434 dpdk_flowcontrol_callback_t callback)
1436 dpdk_main.flowcontrol_callback = callback;
1439 #define UP_DOWN_FLAG_EVENT 1
1442 u32 dpdk_get_admin_up_down_in_progress (void)
1444 return dpdk_main.admin_up_down_in_progress;
1448 admin_up_down_process (vlib_main_t * vm,
1449 vlib_node_runtime_t * rt,
1452 clib_error_t * error = 0;
1454 uword *event_data = 0;
1461 vlib_process_wait_for_event (vm);
1463 event_type = vlib_process_get_events (vm, &event_data);
1465 dpdk_main.admin_up_down_in_progress = 1;
1467 for (index=0; index<vec_len(event_data); index++)
1469 sw_if_index = event_data[index] >> 32;
1470 flags = (u32) event_data[index];
1472 switch (event_type) {
1473 case UP_DOWN_FLAG_EVENT:
1474 error = vnet_sw_interface_set_flags (vnet_get_main(), sw_if_index, flags);
1475 clib_error_report(error);
1480 vec_reset_length (event_data);
1482 dpdk_main.admin_up_down_in_progress = 0;
1485 return 0; /* or not */
1488 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1489 .function = admin_up_down_process,
1490 .type = VLIB_NODE_TYPE_PROCESS,
1491 .name = "admin-up-down-process",
1492 .process_log2_n_stack_bytes = 17, // 256KB
1496 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1497 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1499 * WARNING: when posting this event, no other interface-related calls should
1500 * be made (e.g. vnet_create_sw_interface()) while the event is being
1501 * processed (admin_up_down_in_progress). This is required in order to avoid
1502 * race conditions in manipulating interface data structures.
1504 void post_sw_interface_set_flags (vlib_main_t *vm, u32 sw_if_index, u32 flags)
1506 vlib_process_signal_event
1507 (vm, admin_up_down_process_node.index,
1509 (((uword)sw_if_index << 32) | flags));
1513 * Called by the dpdk driver's rte_delay_us() function.
1514 * Return 0 to have the dpdk do a regular delay loop.
1515 * Return 1 if to skip the delay loop because we are suspending
1516 * the calling vlib process instead.
1518 int rte_delay_us_override (unsigned us) {
1521 /* Don't bother intercepting for short delays */
1522 if (us < 10) return 0;
1525 * Only intercept if we are in a vlib process.
1526 * If we are called from a vlib worker thread or the vlib main
1527 * thread then do not intercept. (Must not be called from an
1528 * independent pthread).
1530 if (os_get_cpu_number() == 0)
1533 * We're in the vlib main thread or a vlib process. Make sure
1534 * the process is running and we're not still initializing.
1536 vm = vlib_get_main();
1537 if (vlib_in_process_context(vm))
1539 /* Only suspend for the admin_down_process */
1540 vlib_process_t * proc = vlib_get_current_process(vm);
1541 if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
1542 (proc->node_runtime.function != admin_up_down_process))
1545 f64 delay = 1e-6 * us;
1546 vlib_process_suspend(vm, delay);
1550 return 0; // no override