It supports XDP_PASS, XDP_DROP and multi buffer. The new function aq_nic_xmit_xdpf() is used to send packet with xdp_frame and internally it calls aq_nic_map_xdp(). AQC chip supports 32 multi-queues and 8 vectors(irq). there are two option 1. under 8 cores and 4 tx queues per core. 2. under 4 cores and 8 tx queues per core. Like ixgbe, these tx queues can be used only for XDP_TX, XDP_REDIRECT queue. If so, no tx_lock is needed. But this patchset doesn't use this strategy because getting hardware tx queue index cost is too high. So, tx_lock is used in the aq_nic_xmit_xdpf(). single-core, single queue, 80% cpu utilization. 30.75% bpf_prog_xxx_xdp_prog_tx [k] bpf_prog_xxx_xdp_prog_tx 10.35% [kernel] [k] aq_hw_read_reg <---------- here 4.38% [kernel] [k] get_page_from_freelist single-core, 8 queues, 100% cpu utilization, half PPS. 45.56% [kernel] [k] aq_hw_read_reg <---------- here 17.58% bpf_prog_xxx_xdp_prog_tx [k] bpf_prog_xxx_xdp_prog_tx 4.72% [kernel] [k] hw_atl_b0_hw_ring_rx_receive The new function __aq_ring_xdp_clean() is a xdp rx handler and this is called only when XDP is attached. Signed-off-by: Taehee Yoo <ap420073@xxxxxxxxx> --- v4: - Fix compile warning v3: - Change wrong PPS performance result 40% -> 80% in single core(Intel i3-12100) - Separate aq_nic_map_xdp() from aq_nic_map_skb() - Drop multi buffer packets if single buffer XDP is attached - Use xdp_get_{frame/buff}_len() v2: - Do not use inline in C file .../ethernet/aquantia/atlantic/aq_ethtool.c | 8 + .../net/ethernet/aquantia/atlantic/aq_nic.c | 137 +++++++ .../net/ethernet/aquantia/atlantic/aq_nic.h | 2 + .../net/ethernet/aquantia/atlantic/aq_ring.c | 335 +++++++++++++++++- .../net/ethernet/aquantia/atlantic/aq_ring.h | 6 + 5 files changed, 480 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c index a418238f6309..b33979bdfde0 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c @@ -97,6 +97,14 @@ static const char * const aq_ethtool_queue_rx_stat_names[] = { "%sQueue[%d] AllocFails", "%sQueue[%d] SkbAllocFails", "%sQueue[%d] Polls", + "%sQueue[%d] PageFlips", + "%sQueue[%d] PageReuses", + "%sQueue[%d] XdpAbort", + "%sQueue[%d] XdpDrop", + "%sQueue[%d] XdpPass", + "%sQueue[%d] XdpTx", + "%sQueue[%d] XdpInvalid", + "%sQueue[%d] XdpRedirect", }; static const char * const aq_ethtool_queue_tx_stat_names[] = { diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index 33f1a1377588..37110d51e7e3 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -569,6 +569,104 @@ int aq_nic_start(struct aq_nic_s *self) return err; } +static unsigned int aq_nic_map_xdp(struct aq_nic_s *self, + struct xdp_frame *xdpf, + struct aq_ring_s *ring) +{ + struct device *dev = aq_nic_get_dev(self); + struct aq_ring_buff_s *first = NULL; + unsigned int dx = ring->sw_tail; + struct aq_ring_buff_s *dx_buff; + struct skb_shared_info *sinfo; + unsigned int frag_count = 0U; + unsigned int nr_frags = 0U; + unsigned int ret = 0U; + u16 total_len; + + dx_buff = &ring->buff_ring[dx]; + dx_buff->flags = 0U; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + total_len = xdpf->len; + dx_buff->len = total_len; + if (xdp_frame_has_frags(xdpf)) { + nr_frags = sinfo->nr_frags; + total_len += sinfo->xdp_frags_size; + } + dx_buff->pa = dma_map_single(dev, xdpf->data, dx_buff->len, + DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(dev, dx_buff->pa))) + goto exit; + + first = dx_buff; + dx_buff->len_pkt = total_len; + dx_buff->is_sop = 1U; + dx_buff->is_mapped = 1U; + ++ret; + + for (; nr_frags--; ++frag_count) { + skb_frag_t *frag = &sinfo->frags[frag_count]; + unsigned int frag_len = skb_frag_size(frag); + unsigned int buff_offset = 0U; + unsigned int buff_size = 0U; + dma_addr_t frag_pa; + + while (frag_len) { + if (frag_len > AQ_CFG_TX_FRAME_MAX) + buff_size = AQ_CFG_TX_FRAME_MAX; + else + buff_size = frag_len; + + frag_pa = skb_frag_dma_map(dev, frag, buff_offset, + buff_size, DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(dev, frag_pa))) + goto mapping_error; + + dx = aq_ring_next_dx(ring, dx); + dx_buff = &ring->buff_ring[dx]; + + dx_buff->flags = 0U; + dx_buff->len = buff_size; + dx_buff->pa = frag_pa; + dx_buff->is_mapped = 1U; + dx_buff->eop_index = 0xffffU; + + frag_len -= buff_size; + buff_offset += buff_size; + + ++ret; + } + } + + first->eop_index = dx; + dx_buff->is_eop = 1U; + dx_buff->skb = NULL; + dx_buff->xdpf = xdpf; + goto exit; + +mapping_error: + for (dx = ring->sw_tail; + ret > 0; + --ret, dx = aq_ring_next_dx(ring, dx)) { + dx_buff = &ring->buff_ring[dx]; + + if (!(dx_buff->is_gso_tcp || dx_buff->is_gso_udp) && + !dx_buff->is_vlan && dx_buff->pa) { + if (unlikely(dx_buff->is_sop)) + dma_unmap_single(dev, dx_buff->pa, dx_buff->len, + DMA_TO_DEVICE); + else + dma_unmap_page(dev, dx_buff->pa, dx_buff->len, + DMA_TO_DEVICE); + } + } + +exit: + return ret; +} + unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, struct aq_ring_s *ring) { @@ -697,6 +795,7 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, first->eop_index = dx; dx_buff->is_eop = 1U; dx_buff->skb = skb; + dx_buff->xdpf = NULL; goto exit; mapping_error: @@ -725,6 +824,44 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, return ret; } +int aq_nic_xmit_xdpf(struct aq_nic_s *aq_nic, struct aq_ring_s *tx_ring, + struct xdp_frame *xdpf) +{ + u16 queue_index = AQ_NIC_RING2QMAP(aq_nic, tx_ring->idx); + struct net_device *ndev = aq_nic_get_ndev(aq_nic); + struct skb_shared_info *sinfo; + int cpu = smp_processor_id(); + int err = NETDEV_TX_BUSY; + struct netdev_queue *nq; + unsigned int frags = 1; + + if (xdp_frame_has_frags(xdpf)) { + sinfo = xdp_get_shared_info_from_frame(xdpf); + frags += sinfo->nr_frags; + } + + if (frags > AQ_CFG_SKB_FRAGS_MAX) + return err; + + nq = netdev_get_tx_queue(ndev, tx_ring->idx); + __netif_tx_lock(nq, cpu); + + aq_ring_update_queue_state(tx_ring); + + /* Above status update may stop the queue. Check this. */ + if (__netif_subqueue_stopped(aq_nic_get_ndev(aq_nic), queue_index)) + goto out; + + frags = aq_nic_map_xdp(aq_nic, xdpf, tx_ring); + if (likely(frags)) + err = aq_nic->aq_hw_ops->hw_ring_tx_xmit(aq_nic->aq_hw, tx_ring, + frags); +out: + __netif_tx_unlock(nq); + + return err; +} + int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb) { struct aq_nic_cfg_s *cfg = aq_nic_get_cfg(self); diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h index 47123baabd5e..935ba889bd9a 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h @@ -180,6 +180,8 @@ void aq_nic_ndev_free(struct aq_nic_s *self); int aq_nic_start(struct aq_nic_s *self); unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, struct aq_ring_s *ring); +int aq_nic_xmit_xdpf(struct aq_nic_s *aq_nic, struct aq_ring_s *tx_ring, + struct xdp_frame *xdpf); int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb); int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p); int aq_nic_get_regs_count(struct aq_nic_s *self); diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c index b261283641a7..d2953a84073e 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c @@ -31,6 +31,39 @@ static inline void aq_free_rxpage(struct aq_rxpage *rxpage, struct device *dev) rxpage->page = NULL; } +static void aq_unset_rxpage_xdp(struct aq_ring_s *rx_ring, + struct aq_ring_buff_s *buff, + struct device *dev, + struct xdp_buff *xdp) +{ + struct aq_ring_buff_s *nbuff = buff; + struct skb_shared_info *sinfo; + unsigned int next = 0; + int i; + + if (xdp_buff_has_frags(xdp)) { + sinfo = xdp_get_shared_info_from_buff(xdp); + + for (i = 0; i < sinfo->nr_frags; i++) { + skb_frag_t *frag = &sinfo->frags[i]; + struct page *page; + + page = skb_frag_page(frag); + + dma_unmap_page(dev, page->dma_addr, skb_frag_size(frag), + DMA_FROM_DEVICE); + } + + do { + next = nbuff->next; + nbuff = &rx_ring->buff_ring[next]; + nbuff->rxdata.page = NULL; + } while (!nbuff->is_eop); + } + dma_unmap_page(dev, buff->rxdata.daddr, PAGE_SIZE, DMA_FROM_DEVICE); + buff->rxdata.page = NULL; +} + static int aq_get_rxpage(struct aq_rxpage *rxpage, struct aq_ring_s *rx_ring) { struct device *dev = aq_nic_get_dev(rx_ring->aq_nic); @@ -316,15 +349,26 @@ bool aq_ring_tx_clean(struct aq_ring_s *self) } } - if (unlikely(buff->is_eop && buff->skb)) { + if (likely(!buff->is_eop)) + goto out; + + if (buff->skb) { u64_stats_update_begin(&self->stats.tx.syncp); ++self->stats.tx.packets; self->stats.tx.bytes += buff->skb->len; u64_stats_update_end(&self->stats.tx.syncp); - dev_kfree_skb_any(buff->skb); - buff->skb = NULL; + } else if (buff->xdpf) { + u64_stats_update_begin(&self->stats.tx.syncp); + ++self->stats.tx.packets; + self->stats.tx.bytes += xdp_get_frame_len(buff->xdpf); + u64_stats_update_end(&self->stats.tx.syncp); + xdp_return_frame_rx_napi(buff->xdpf); } + +out: + buff->skb = NULL; + buff->xdpf = NULL; buff->pa = 0U; buff->eop_index = 0xffffU; self->sw_head = aq_ring_next_dx(self, self->sw_head); @@ -357,11 +401,136 @@ static void aq_rx_checksum(struct aq_ring_s *self, __skb_incr_checksum_unnecessary(skb); } -#define AQ_SKB_ALIGN SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) -int aq_ring_rx_clean(struct aq_ring_s *self, - struct napi_struct *napi, - int *work_done, - int budget) +static struct sk_buff *aq_xdp_run_prog(struct aq_nic_s *aq_nic, + struct xdp_buff *xdp, + struct aq_ring_s *rx_ring, + struct aq_ring_buff_s *buff) +{ + int result = NETDEV_TX_BUSY; + struct aq_ring_s *tx_ring; + struct xdp_frame *xdpf; + struct bpf_prog *prog; + u32 act = XDP_ABORTED; + struct sk_buff *skb; + + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.packets; + rx_ring->stats.rx.bytes += xdp_get_buff_len(xdp); + u64_stats_update_end(&rx_ring->stats.rx.syncp); + + prog = READ_ONCE(rx_ring->xdp_prog); + if (!prog) + goto pass; + + prefetchw(xdp->data_hard_start); /* xdp_frame write */ + + /* single buffer XDP program, but packet is multi buffer, aborted */ + if (xdp_buff_has_frags(xdp) && !prog->aux->xdp_has_frags) + goto out_aborted; + + act = bpf_prog_run_xdp(prog, xdp); + switch (act) { + case XDP_PASS: +pass: + xdpf = xdp_convert_buff_to_frame(xdp); + if (unlikely(!xdpf)) + goto out_aborted; + skb = xdp_build_skb_from_frame(xdpf, aq_nic->ndev); + if (!skb) + goto out_aborted; + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_pass; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + aq_unset_rxpage_xdp(rx_ring, buff, &aq_nic->ndev->dev, xdp); + return skb; + case XDP_TX: + xdpf = xdp_convert_buff_to_frame(xdp); + if (unlikely(!xdpf)) + goto out_aborted; + tx_ring = aq_nic->aq_ring_tx[rx_ring->idx]; + result = aq_nic_xmit_xdpf(aq_nic, tx_ring, xdpf); + if (result == NETDEV_TX_BUSY) + goto out_aborted; + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_tx; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + aq_unset_rxpage_xdp(rx_ring, buff, &aq_nic->ndev->dev, xdp); + break; + case XDP_REDIRECT: + if (xdp_do_redirect(aq_nic->ndev, xdp, prog) < 0) + goto out_aborted; + xdp_do_flush(); + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_redirect; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + aq_unset_rxpage_xdp(rx_ring, buff, &aq_nic->ndev->dev, xdp); + break; + default: + fallthrough; + case XDP_ABORTED: +out_aborted: + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_aborted; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + trace_xdp_exception(aq_nic->ndev, prog, act); + bpf_warn_invalid_xdp_action(aq_nic->ndev, prog, act); + break; + case XDP_DROP: + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_drop; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + break; + } + + return ERR_PTR(-result); +} + +static bool aq_add_rx_fragment(struct device *dev, + struct aq_ring_s *ring, + struct aq_ring_buff_s *buff, + struct xdp_buff *xdp) +{ + struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); + struct aq_ring_buff_s *buff_ = buff; + + memset(sinfo, 0, sizeof(*sinfo)); + do { + skb_frag_t *frag; + + if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS)) + return true; + + frag = &sinfo->frags[sinfo->nr_frags++]; + buff_ = &ring->buff_ring[buff_->next]; + dma_sync_single_range_for_cpu(dev, + buff_->rxdata.daddr, + buff_->rxdata.pg_off, + buff_->len, + DMA_FROM_DEVICE); + skb_frag_off_set(frag, buff_->rxdata.pg_off); + skb_frag_size_set(frag, buff_->len); + sinfo->xdp_frags_size += buff_->len; + __skb_frag_set_page(frag, buff_->rxdata.page); + + buff_->is_cleaned = 1; + + buff->is_ip_cso &= buff_->is_ip_cso; + buff->is_udp_cso &= buff_->is_udp_cso; + buff->is_tcp_cso &= buff_->is_tcp_cso; + buff->is_cso_err |= buff_->is_cso_err; + + if (page_is_pfmemalloc(buff_->rxdata.page)) + xdp_buff_set_frag_pfmemalloc(xdp); + + } while (!buff_->is_eop); + + xdp_buff_set_frags_flag(xdp); + + return false; +} + +static int __aq_ring_rx_clean(struct aq_ring_s *self, struct napi_struct *napi, + int *work_done, int budget) { struct net_device *ndev = aq_nic_get_ndev(self->aq_nic); bool is_rsc_completed = true; @@ -528,6 +697,148 @@ int aq_ring_rx_clean(struct aq_ring_s *self, return err; } +static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring, + struct napi_struct *napi, int *work_done, + int budget) +{ + struct aq_nic_s *aq_nic = rx_ring->aq_nic; + bool is_rsc_completed = true; + struct device *dev; + int err = 0; + + dev = aq_nic_get_dev(aq_nic); + + for (; (rx_ring->sw_head != rx_ring->hw_head) && budget; + rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head), + --budget, ++(*work_done)) { + struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head]; + bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring); + struct aq_ring_buff_s *buff_ = NULL; + struct sk_buff *skb = NULL; + unsigned int next_ = 0U; + struct xdp_buff xdp; + void *hard_start; + + if (buff->is_cleaned) + continue; + + if (!buff->is_eop) { + buff_ = buff; + do { + if (buff_->next >= rx_ring->size) { + err = -EIO; + goto err_exit; + } + next_ = buff_->next; + buff_ = &rx_ring->buff_ring[next_]; + is_rsc_completed = + aq_ring_dx_in_range(rx_ring->sw_head, + next_, + rx_ring->hw_head); + + if (unlikely(!is_rsc_completed)) + break; + + buff->is_error |= buff_->is_error; + buff->is_cso_err |= buff_->is_cso_err; + } while (!buff_->is_eop); + + if (!is_rsc_completed) { + err = 0; + goto err_exit; + } + if (buff->is_error || + (buff->is_lro && buff->is_cso_err)) { + buff_ = buff; + do { + if (buff_->next >= rx_ring->size) { + err = -EIO; + goto err_exit; + } + next_ = buff_->next; + buff_ = &rx_ring->buff_ring[next_]; + + buff_->is_cleaned = true; + } while (!buff_->is_eop); + + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.errors; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + } + + if (buff->is_error) { + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.errors; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + + dma_sync_single_range_for_cpu(dev, + buff->rxdata.daddr, + buff->rxdata.pg_off, + buff->len, DMA_FROM_DEVICE); + hard_start = page_address(buff->rxdata.page); + + if (is_ptp_ring) + buff->len -= + aq_ptp_extract_ts(rx_ring->aq_nic, skb, + aq_buf_vaddr(&buff->rxdata), + buff->len); + + /* page_order is always 0 if xdp is enabled */ + xdp_init_buff(&xdp, PAGE_SIZE, &rx_ring->xdp_rxq); + xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset, + buff->len, true); + if (!buff->is_eop) { + if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) { + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.packets; + rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp); + ++rx_ring->stats.rx.xdp_aborted; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + } + + skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff); + if (IS_ERR(skb) || !skb) + continue; + + if (buff->is_vlan) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + buff->vlan_rx_tag); + + aq_rx_checksum(rx_ring, buff, skb); + + skb_set_hash(skb, buff->rss_hash, + buff->is_hash_l4 ? PKT_HASH_TYPE_L4 : + PKT_HASH_TYPE_NONE); + /* Send all PTP traffic to 0 queue */ + skb_record_rx_queue(skb, + is_ptp_ring ? 0 + : AQ_NIC_RING2QMAP(rx_ring->aq_nic, + rx_ring->idx)); + + napi_gro_receive(napi, skb); + } + +err_exit: + return err; +} + +int aq_ring_rx_clean(struct aq_ring_s *self, + struct napi_struct *napi, + int *work_done, + int budget) +{ + if (static_branch_unlikely(&aq_xdp_locking_key)) + return __aq_ring_xdp_clean(self, napi, work_done, budget); + else + return __aq_ring_rx_clean(self, napi, work_done, budget); +} + void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic) { #if IS_REACHABLE(CONFIG_PTP_1588_CLOCK) @@ -617,6 +928,14 @@ unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data) data[++count] = self->stats.rx.alloc_fails; data[++count] = self->stats.rx.skb_alloc_fails; data[++count] = self->stats.rx.polls; + data[++count] = self->stats.rx.pg_flips; + data[++count] = self->stats.rx.pg_reuses; + data[++count] = self->stats.rx.xdp_aborted; + data[++count] = self->stats.rx.xdp_drop; + data[++count] = self->stats.rx.xdp_pass; + data[++count] = self->stats.rx.xdp_tx; + data[++count] = self->stats.rx.xdp_invalid; + data[++count] = self->stats.rx.xdp_redirect; } while (u64_stats_fetch_retry_irq(&self->stats.rx.syncp, start)); } else { /* This data should mimic aq_ethtool_queue_tx_stat_names structure */ diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h index 168002657629..6a86d9cfac35 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h @@ -105,6 +105,12 @@ struct aq_ring_stats_rx_s { u64 pg_losts; u64 pg_flips; u64 pg_reuses; + u64 xdp_aborted; + u64 xdp_drop; + u64 xdp_pass; + u64 xdp_tx; + u64 xdp_invalid; + u64 xdp_redirect; }; struct aq_ring_stats_tx_s { -- 2.17.1