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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#define MAX_GRO_SKBS 8
static DEFINE_SPINLOCK(offload_lock);
/** * dev_add_offload - register offload handlers * @po: protocol offload declaration * * Add protocol offload handlers to the networking stack. The passed * &proto_offload is linked into kernel lists and may not be freed until * it has been removed from the kernel lists. * * This call does not sleep therefore it can not * guarantee all CPU's that are in middle of receiving packets * will see the new offload handlers (until the next received packet). */void dev_add_offload(struct packet_offload *po){ struct packet_offload *elem;
spin_lock(&offload_lock); list_for_each_entry(elem, &net_hotdata.offload_base, list) { if (po->priority < elem->priority) break; } list_add_rcu(&po->list, elem->list.prev); spin_unlock(&offload_lock);}EXPORT_SYMBOL(dev_add_offload);
/** * __dev_remove_offload - remove offload handler * @po: packet offload declaration * * Remove a protocol offload handler that was previously added to the * kernel offload handlers by dev_add_offload(). The passed &offload_type * is removed from the kernel lists and can be freed or reused once this * function returns. * * The packet type might still be in use by receivers * and must not be freed until after all the CPU's have gone * through a quiescent state. */static void __dev_remove_offload(struct packet_offload *po){ struct list_head *head = &net_hotdata.offload_base; struct packet_offload *po1;
spin_lock(&offload_lock);
list_for_each_entry(po1, head, list) { if (po == po1) { list_del_rcu(&po->list); goto out; } }
pr_warn("dev_remove_offload: %p not found\n", po);out: spin_unlock(&offload_lock);}
/** * dev_remove_offload - remove packet offload handler * @po: packet offload declaration * * Remove a packet offload handler that was previously added to the kernel * offload handlers by dev_add_offload(). The passed &offload_type is * removed from the kernel lists and can be freed or reused once this * function returns. * * This call sleeps to guarantee that no CPU is looking at the packet * type after return. */void dev_remove_offload(struct packet_offload *po){ __dev_remove_offload(po);
synchronize_net();}EXPORT_SYMBOL(dev_remove_offload);
int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb){ struct skb_shared_info *pinfo, *skbinfo = skb_shinfo(skb); unsigned int offset = skb_gro_offset(skb); unsigned int headlen = skb_headlen(skb); unsigned int len = skb_gro_len(skb); unsigned int delta_truesize; unsigned int new_truesize; struct sk_buff *lp; int segs;
/* Do not splice page pool based packets w/ non-page pool * packets. This can result in reference count issues as page * pool pages will not decrement the reference count and will * instead be immediately returned to the pool or have frag * count decremented. */ if (p->pp_recycle != skb->pp_recycle) return -ETOOMANYREFS;
if (skb_zcopy(p) || skb_zcopy(skb)) return -ETOOMANYREFS;
if (unlikely(p->len + len >= netif_get_gro_max_size(p->dev, p) || NAPI_GRO_CB(skb)->flush)) return -E2BIG;
if (unlikely(p->len + len >= GRO_LEGACY_MAX_SIZE)) { if (NAPI_GRO_CB(skb)->proto != IPPROTO_TCP || p->encapsulation) return -E2BIG; }
segs = NAPI_GRO_CB(skb)->count; lp = NAPI_GRO_CB(p)->last; pinfo = skb_shinfo(lp);
if (headlen <= offset) { skb_frag_t *frag; skb_frag_t *frag2; int i = skbinfo->nr_frags; int nr_frags = pinfo->nr_frags + i;
if (nr_frags > MAX_SKB_FRAGS) goto merge;
offset -= headlen; pinfo->nr_frags = nr_frags; skbinfo->nr_frags = 0;
frag = pinfo->frags + nr_frags; frag2 = skbinfo->frags + i; do { *--frag = *--frag2; } while (--i);
skb_frag_off_add(frag, offset); skb_frag_size_sub(frag, offset);
/* all fragments truesize : remove (head size + sk_buff) */ new_truesize = SKB_TRUESIZE(skb_end_offset(skb)); delta_truesize = skb->truesize - new_truesize;
skb->truesize = new_truesize; skb->len -= skb->data_len; skb->data_len = 0;
NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE; goto done; } else if (skb->head_frag) { int nr_frags = pinfo->nr_frags; skb_frag_t *frag = pinfo->frags + nr_frags; struct page *page = virt_to_head_page(skb->head); unsigned int first_size = headlen - offset; unsigned int first_offset;
if (nr_frags + 1 + skbinfo->nr_frags > MAX_SKB_FRAGS) goto merge;
first_offset = skb->data - (unsigned char *)page_address(page) + offset;
pinfo->nr_frags = nr_frags + 1 + skbinfo->nr_frags;
skb_frag_fill_page_desc(frag, page, first_offset, first_size);
memcpy(frag + 1, skbinfo->frags, sizeof(*frag) * skbinfo->nr_frags); /* We dont need to clear skbinfo->nr_frags here */
new_truesize = SKB_DATA_ALIGN(sizeof(struct sk_buff)); delta_truesize = skb->truesize - new_truesize; skb->truesize = new_truesize; NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE_STOLEN_HEAD; goto done; }
merge: /* sk ownership - if any - completely transferred to the aggregated packet */ skb->destructor = NULL; skb->sk = NULL; delta_truesize = skb->truesize; if (offset > headlen) { unsigned int eat = offset - headlen;
skb_frag_off_add(&skbinfo->frags[0], eat); skb_frag_size_sub(&skbinfo->frags[0], eat); skb->data_len -= eat; skb->len -= eat; offset = headlen; }
__skb_pull(skb, offset);
if (NAPI_GRO_CB(p)->last == p) skb_shinfo(p)->frag_list = skb; else NAPI_GRO_CB(p)->last->next = skb; NAPI_GRO_CB(p)->last = skb; __skb_header_release(skb); lp = p;
done: NAPI_GRO_CB(p)->count += segs; p->data_len += len; p->truesize += delta_truesize; p->len += len; skb_shinfo(p)->flags |= skbinfo->flags & SKBFL_SHARED_FRAG; if (lp != p) { lp->data_len += len; lp->truesize += delta_truesize; lp->len += len; skb_shinfo(lp)->flags |= skbinfo->flags & SKBFL_SHARED_FRAG; } NAPI_GRO_CB(skb)->same_flow = 1; return 0;}
int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb){ /* make sure to check flush flag and to not merge */ if (unlikely(p->len + skb->len >= 65536 || NAPI_GRO_CB(skb)->flush)) return -E2BIG;
if (!pskb_may_pull(skb, skb_gro_offset(skb))) { NAPI_GRO_CB(skb)->flush = 1; return -ENOMEM; }
if (NAPI_GRO_CB(p)->last == p) skb_shinfo(p)->frag_list = skb; else NAPI_GRO_CB(p)->last->next = skb;
skb_pull(skb, skb_gro_offset(skb));
NAPI_GRO_CB(p)->last = skb; NAPI_GRO_CB(p)->count++; p->data_len += skb->len;
/* sk ownership - if any - completely transferred to the aggregated packet */ skb->destructor = NULL; skb->sk = NULL; p->truesize += skb->truesize; p->len += skb->len;
skb_shinfo(p)->flags |= skb_shinfo(skb)->flags & SKBFL_SHARED_FRAG;
NAPI_GRO_CB(skb)->same_flow = 1;
return 0;}
static void gro_complete(struct gro_node *gro, struct sk_buff *skb){ struct list_head *head = &net_hotdata.offload_base; struct packet_offload *ptype; __be16 type = skb->protocol; int err = -ENOENT;
BUILD_BUG_ON(sizeof(struct napi_gro_cb) > sizeof(skb->cb));
if (NAPI_GRO_CB(skb)->count == 1) { skb_shinfo(skb)->gso_size = 0; goto out; }
/* NICs can feed encapsulated packets into GRO */ skb->encapsulation = 0; rcu_read_lock(); list_for_each_entry_rcu(ptype, head, list) { if (ptype->type != type || !ptype->callbacks.gro_complete) continue;
err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete, ipv6_gro_complete, inet_gro_complete, skb, 0); break; } rcu_read_unlock();
if (err) { WARN_ON(&ptype->list == head); kfree_skb(skb); return; }
out: gro_normal_one(gro, skb, NAPI_GRO_CB(skb)->count);}
static void __gro_flush_chain(struct gro_node *gro, u32 index, bool flush_old){ struct list_head *head = &gro->hash[index].list; struct sk_buff *skb, *p;
list_for_each_entry_safe_reverse(skb, p, head, list) { if (flush_old && NAPI_GRO_CB(skb)->age == jiffies) return; skb_list_del_init(skb); gro_complete(gro, skb); gro->hash[index].count--; }
if (!gro->hash[index].count) __clear_bit(index, &gro->bitmask);}
/* * gro->hash[].list contains packets ordered by age. * youngest packets at the head of it. * Complete skbs in reverse order to reduce latencies. */void __gro_flush(struct gro_node *gro, bool flush_old){ unsigned long bitmask = gro->bitmask; unsigned int i, base = ~0U;
while ((i = ffs(bitmask)) != 0) { bitmask >>= i; base += i; __gro_flush_chain(gro, base, flush_old); }}EXPORT_SYMBOL(__gro_flush);
static unsigned long gro_list_prepare_tc_ext(const struct sk_buff *skb, const struct sk_buff *p, unsigned long diffs){#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) struct tc_skb_ext *skb_ext; struct tc_skb_ext *p_ext;
skb_ext = skb_ext_find(skb, TC_SKB_EXT); p_ext = skb_ext_find(p, TC_SKB_EXT);
diffs |= (!!p_ext) ^ (!!skb_ext); if (!diffs && unlikely(skb_ext)) diffs |= p_ext->chain ^ skb_ext->chain;#endif return diffs;}
static void gro_list_prepare(const struct list_head *head, const struct sk_buff *skb){ unsigned int maclen = skb->dev->hard_header_len; u32 hash = skb_get_hash_raw(skb); struct sk_buff *p;
list_for_each_entry(p, head, list) { unsigned long diffs;
if (hash != skb_get_hash_raw(p)) { NAPI_GRO_CB(p)->same_flow = 0; continue; }
diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev; diffs |= p->vlan_all ^ skb->vlan_all; diffs |= skb_metadata_differs(p, skb); if (maclen == ETH_HLEN) diffs |= compare_ether_header(skb_mac_header(p), skb_mac_header(skb)); else if (!diffs) diffs = memcmp(skb_mac_header(p), skb_mac_header(skb), maclen);
/* in most common scenarios 'slow_gro' is 0 * otherwise we are already on some slower paths * either skip all the infrequent tests altogether or * avoid trying too hard to skip each of them individually */ if (!diffs && unlikely(skb->slow_gro | p->slow_gro)) { diffs |= p->sk != skb->sk; diffs |= skb_metadata_dst_cmp(p, skb); diffs |= skb_get_nfct(p) ^ skb_get_nfct(skb);
diffs |= gro_list_prepare_tc_ext(skb, p, diffs); diffs |= __psp_skb_coalesce_diff(skb, p, diffs); }
NAPI_GRO_CB(p)->same_flow = !diffs; }}
static inline void skb_gro_reset_offset(struct sk_buff *skb, u32 nhoff){ const struct skb_shared_info *pinfo; const skb_frag_t *frag0; unsigned int headlen;
NAPI_GRO_CB(skb)->network_offset = 0; NAPI_GRO_CB(skb)->data_offset = 0; headlen = skb_headlen(skb); NAPI_GRO_CB(skb)->frag0 = skb->data; NAPI_GRO_CB(skb)->frag0_len = headlen; if (headlen) return;
pinfo = skb_shinfo(skb); frag0 = &pinfo->frags[0];
if (pinfo->nr_frags && skb_frag_page(frag0) && !PageHighMem(skb_frag_page(frag0)) && (!NET_IP_ALIGN || !((skb_frag_off(frag0) + nhoff) & 3))) { NAPI_GRO_CB(skb)->frag0 = skb_frag_address(frag0); NAPI_GRO_CB(skb)->frag0_len = min_t(unsigned int, skb_frag_size(frag0), skb->end - skb->tail); }}
static void gro_pull_from_frag0(struct sk_buff *skb, int grow){ struct skb_shared_info *pinfo = skb_shinfo(skb);
DEBUG_NET_WARN_ON_ONCE(skb->end - skb->tail < grow);
memcpy(skb_tail_pointer(skb), NAPI_GRO_CB(skb)->frag0, grow);
skb->data_len -= grow; skb->tail += grow;
skb_frag_off_add(&pinfo->frags[0], grow); skb_frag_size_sub(&pinfo->frags[0], grow);
if (unlikely(!skb_frag_size(&pinfo->frags[0]))) { skb_frag_unref(skb, 0); memmove(pinfo->frags, pinfo->frags + 1, --pinfo->nr_frags * sizeof(pinfo->frags[0])); }}
static void gro_try_pull_from_frag0(struct sk_buff *skb){ int grow = skb_gro_offset(skb) - skb_headlen(skb);
if (grow > 0) gro_pull_from_frag0(skb, grow);}
static void gro_flush_oldest(struct gro_node *gro, struct list_head *head){ struct sk_buff *oldest;
oldest = list_last_entry(head, struct sk_buff, list);
/* We are called with head length >= MAX_GRO_SKBS, so this is * impossible. */ if (WARN_ON_ONCE(!oldest)) return;
/* Do not adjust napi->gro_hash[].count, caller is adding a new * SKB to the chain. */ skb_list_del_init(oldest); gro_complete(gro, oldest);}
static enum gro_result dev_gro_receive(struct gro_node *gro, struct sk_buff *skb){ u32 bucket = skb_get_hash_raw(skb) & (GRO_HASH_BUCKETS - 1); struct list_head *head = &net_hotdata.offload_base; struct gro_list *gro_list = &gro->hash[bucket]; struct packet_offload *ptype; __be16 type = skb->protocol; struct sk_buff *pp = NULL; enum gro_result ret; int same_flow;
if (netif_elide_gro(skb->dev)) goto normal;
gro_list_prepare(&gro_list->list, skb);
rcu_read_lock(); list_for_each_entry_rcu(ptype, head, list) { if (ptype->type == type && ptype->callbacks.gro_receive) goto found_ptype; } rcu_read_unlock(); goto normal;
found_ptype: skb_set_network_header(skb, skb_gro_offset(skb)); skb_reset_mac_len(skb); BUILD_BUG_ON(sizeof_field(struct napi_gro_cb, zeroed) != sizeof(u32)); BUILD_BUG_ON(!IS_ALIGNED(offsetof(struct napi_gro_cb, zeroed), sizeof(u32))); /* Avoid slow unaligned acc */ *(u32 *)&NAPI_GRO_CB(skb)->zeroed = 0; NAPI_GRO_CB(skb)->flush = skb_has_frag_list(skb); NAPI_GRO_CB(skb)->count = 1; if (unlikely(skb_is_gso(skb))) { NAPI_GRO_CB(skb)->count = skb_shinfo(skb)->gso_segs; /* Only support TCP and non DODGY users. */ if (!skb_is_gso_tcp(skb) || (skb_shinfo(skb)->gso_type & SKB_GSO_DODGY)) NAPI_GRO_CB(skb)->flush = 1; }
/* Setup for GRO checksum validation */ switch (skb->ip_summed) { case CHECKSUM_COMPLETE: NAPI_GRO_CB(skb)->csum = skb->csum; NAPI_GRO_CB(skb)->csum_valid = 1; break; case CHECKSUM_UNNECESSARY: NAPI_GRO_CB(skb)->csum_cnt = skb->csum_level + 1; break; }
pp = INDIRECT_CALL_INET(ptype->callbacks.gro_receive, ipv6_gro_receive, inet_gro_receive, &gro_list->list, skb);
rcu_read_unlock();
if (PTR_ERR(pp) == -EINPROGRESS) { ret = GRO_CONSUMED; goto ok; }
same_flow = NAPI_GRO_CB(skb)->same_flow; ret = NAPI_GRO_CB(skb)->free ? GRO_MERGED_FREE : GRO_MERGED;
if (pp) { skb_list_del_init(pp); gro_complete(gro, pp); gro_list->count--; }
if (same_flow) goto ok;
if (NAPI_GRO_CB(skb)->flush) goto normal;
if (unlikely(gro_list->count >= MAX_GRO_SKBS)) gro_flush_oldest(gro, &gro_list->list); else gro_list->count++;
/* Must be called before setting NAPI_GRO_CB(skb)->{age|last} */ gro_try_pull_from_frag0(skb); NAPI_GRO_CB(skb)->age = jiffies; NAPI_GRO_CB(skb)->last = skb; if (!skb_is_gso(skb)) skb_shinfo(skb)->gso_size = skb_gro_len(skb); list_add(&skb->list, &gro_list->list); ret = GRO_HELD;ok: if (gro_list->count) { if (!test_bit(bucket, &gro->bitmask)) __set_bit(bucket, &gro->bitmask); } else if (test_bit(bucket, &gro->bitmask)) { __clear_bit(bucket, &gro->bitmask); }
return ret;
normal: ret = GRO_NORMAL; gro_try_pull_from_frag0(skb); goto ok;}
struct packet_offload *gro_find_receive_by_type(__be16 type){ struct list_head *offload_head = &net_hotdata.offload_base; struct packet_offload *ptype;
list_for_each_entry_rcu(ptype, offload_head, list) { if (ptype->type != type || !ptype->callbacks.gro_receive) continue; return ptype; } return NULL;}EXPORT_SYMBOL(gro_find_receive_by_type);
struct packet_offload *gro_find_complete_by_type(__be16 type){ struct list_head *offload_head = &net_hotdata.offload_base; struct packet_offload *ptype;
list_for_each_entry_rcu(ptype, offload_head, list) { if (ptype->type != type || !ptype->callbacks.gro_complete) continue; return ptype; } return NULL;}EXPORT_SYMBOL(gro_find_complete_by_type);
static gro_result_t gro_skb_finish(struct gro_node *gro, struct sk_buff *skb, gro_result_t ret){ switch (ret) { case GRO_NORMAL: gro_normal_one(gro, skb, 1); break;
case GRO_MERGED_FREE: if (NAPI_GRO_CB(skb)->free == NAPI_GRO_FREE_STOLEN_HEAD) napi_skb_free_stolen_head(skb); else if (skb->fclone != SKB_FCLONE_UNAVAILABLE) __kfree_skb(skb); else __napi_kfree_skb(skb, SKB_CONSUMED); break;
case GRO_HELD: case GRO_MERGED: case GRO_CONSUMED: break; }
return ret;}
gro_result_t gro_receive_skb(struct gro_node *gro, struct sk_buff *skb){ gro_result_t ret;
__skb_mark_napi_id(skb, gro); trace_napi_gro_receive_entry(skb);
skb_gro_reset_offset(skb, 0);
ret = gro_skb_finish(gro, skb, dev_gro_receive(gro, skb)); trace_napi_gro_receive_exit(ret);
return ret;}EXPORT_SYMBOL(gro_receive_skb);
static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb){ struct skb_shared_info *shinfo;
if (unlikely(skb->pfmemalloc)) { consume_skb(skb); return; } __skb_pull(skb, skb_headlen(skb)); /* restore the reserve we had after netdev_alloc_skb_ip_align() */ skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN - skb_headroom(skb)); __vlan_hwaccel_clear_tag(skb); skb->dev = napi->dev; skb->skb_iif = 0;
/* eth_type_trans() assumes pkt_type is PACKET_HOST */ skb->pkt_type = PACKET_HOST;
skb->encapsulation = 0; skb->ip_summed = CHECKSUM_NONE;
shinfo = skb_shinfo(skb); shinfo->gso_type = 0; shinfo->gso_size = 0; shinfo->hwtstamps.hwtstamp = 0;
if (unlikely(skb->slow_gro)) { skb_orphan(skb); skb_ext_reset(skb); nf_reset_ct(skb); skb->slow_gro = 0; }
napi->skb = skb;}
struct sk_buff *napi_get_frags(struct napi_struct *napi){ struct sk_buff *skb = napi->skb;
if (!skb) { skb = napi_alloc_skb(napi, GRO_MAX_HEAD); if (skb) { napi->skb = skb; skb_mark_napi_id(skb, napi); } } return skb;}EXPORT_SYMBOL(napi_get_frags);
static gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb, gro_result_t ret){ switch (ret) { case GRO_NORMAL: case GRO_HELD: __skb_push(skb, ETH_HLEN); skb->protocol = eth_type_trans(skb, skb->dev); if (ret == GRO_NORMAL) gro_normal_one(&napi->gro, skb, 1); break;
case GRO_MERGED_FREE: if (NAPI_GRO_CB(skb)->free == NAPI_GRO_FREE_STOLEN_HEAD) napi_skb_free_stolen_head(skb); else napi_reuse_skb(napi, skb); break;
case GRO_MERGED: case GRO_CONSUMED: break; }
return ret;}
/* Upper GRO stack assumes network header starts at gro_offset=0 * Drivers could call both napi_gro_frags() and napi_gro_receive() * We copy ethernet header into skb->data to have a common layout. */static struct sk_buff *napi_frags_skb(struct napi_struct *napi){ struct sk_buff *skb = napi->skb; const struct ethhdr *eth; unsigned int hlen = sizeof(*eth);
napi->skb = NULL;
skb_reset_mac_header(skb); skb_gro_reset_offset(skb, hlen);
if (unlikely(!skb_gro_may_pull(skb, hlen))) { eth = skb_gro_header_slow(skb, hlen, 0); if (unlikely(!eth)) { net_warn_ratelimited("%s: dropping impossible skb from %s\n", __func__, napi->dev->name); napi_reuse_skb(napi, skb); return NULL; } } else { eth = (const struct ethhdr *)skb->data;
if (NAPI_GRO_CB(skb)->frag0 != skb->data) gro_pull_from_frag0(skb, hlen);
NAPI_GRO_CB(skb)->frag0 += hlen; NAPI_GRO_CB(skb)->frag0_len -= hlen; } __skb_pull(skb, hlen);
/* * This works because the only protocols we care about don't require * special handling. * We'll fix it up properly in napi_frags_finish() */ skb->protocol = eth->h_proto;
return skb;}
gro_result_t napi_gro_frags(struct napi_struct *napi){ gro_result_t ret; struct sk_buff *skb = napi_frags_skb(napi);
trace_napi_gro_frags_entry(skb);
ret = napi_frags_finish(napi, skb, dev_gro_receive(&napi->gro, skb)); trace_napi_gro_frags_exit(ret);
return ret;}EXPORT_SYMBOL(napi_gro_frags);
/* Compute the checksum from gro_offset and return the folded value * after adding in any pseudo checksum. */__sum16 __skb_gro_checksum_complete(struct sk_buff *skb){ __wsum wsum; __sum16 sum;
wsum = skb_checksum(skb, skb_gro_offset(skb), skb_gro_len(skb), 0);
/* NAPI_GRO_CB(skb)->csum holds pseudo checksum */ sum = csum_fold(csum_add(NAPI_GRO_CB(skb)->csum, wsum)); /* See comments in __skb_checksum_complete(). */ if (likely(!sum)) { if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE) && !skb->csum_complete_sw) netdev_rx_csum_fault(skb->dev, skb); }
NAPI_GRO_CB(skb)->csum = wsum; NAPI_GRO_CB(skb)->csum_valid = 1;
return sum;}EXPORT_SYMBOL(__skb_gro_checksum_complete);
void gro_init(struct gro_node *gro){ for (u32 i = 0; i < GRO_HASH_BUCKETS; i++) { INIT_LIST_HEAD(&gro->hash[i].list); gro->hash[i].count = 0; }
gro->bitmask = 0; gro->cached_napi_id = 0;
INIT_LIST_HEAD(&gro->rx_list); gro->rx_count = 0;}
void gro_cleanup(struct gro_node *gro){ struct sk_buff *skb, *n;
for (u32 i = 0; i < GRO_HASH_BUCKETS; i++) { list_for_each_entry_safe(skb, n, &gro->hash[i].list, list) kfree_skb(skb);
gro->hash[i].count = 0; }
gro->bitmask = 0; gro->cached_napi_id = 0;
list_for_each_entry_safe(skb, n, &gro->rx_list, list) kfree_skb(skb);
gro->rx_count = 0;}