skb_release_data(skb); //将skb指向新的data skb->head = data; skb->end = data + size; //重新初始化新skb的各个报头指针 skb->h.raw += offset; skb->nh.raw += offset; skb->mac.raw += offset; skb->tail += offset; skb->data += offset; skb->cloned = 0; skb->tail += sk...
offset= data - skb->head;//释放之前skb的dataskb_release_data(skb);//将skb指向新的dataskb->head =data; skb->end = data +size;//重新初始化新skb的各个报头指针skb->h.raw +=offset; skb->nh.raw +=offset; skb->mac.raw +=offset; skb->tail +=offset; skb->data +=offset; skb->c...
上面提到的在TC egress中skb->data_end-skb->data实际是IP+TCP+eth的大小,但是ingress中skb->data_end-skb->data实际是IP+TCP+eth+payload的大小的原因就是非线性区的存在导致的。 也就是data_end - data其实是线性区的大小,而skb->len是线性区加非线性区的大小,前者其实是skb->data_len,但是BPF程序中无...
上面提到的在TC egress中skb->data_end-skb->data实际是IP+TCP+eth的大小,但是ingress中skb->data_end-skb->data实际是IP+TCP+eth+payload的大小的原因就是非线性区的存在导致的。 也就是data_end - data其实是线性区的大小,而skb->len是线性区加非线性区的大小,前者其实是skb->data_len,但是BPF程序中无...
void*data = (void*)(long)skb->data; void*data_end = (void*)(long)skb->data_end; char*payload = data +sizeof(*eth) +sizeof(*ip) +sizeof(*tcp) 这样的方法在ingress中是成功的,但是在egress宏实际获取数据是失败的,我尝试使用如下代码打印在改变payload大小: ...
KELUN-BIOTECH(6990.HK):DATA RELEASE AT ASCO FURTHER CONFIRMED SKB264’S POTENTIAL Promising efficacy of SKB264+A167 in 1L NSCLC. SKB264 (Q3W)+A167 (PD-L1)’s 15.4 months of mPFS in 1L NSCLC was much better than the SoC - 9.0 months mPFS of Keytruda+chemo in KEYNOTE189 and 9.7 ...
skb_release_all(skb);/*释放skb附带的所有数据*/kfree_skbmem(skb);/*释放skb*/} staticvoidskb_free_head(structsk_buff *skb) { unsignedchar*head = skb->head;if(skb->head_frag)//表示线性区 数据在page 区 len=size&&&date_len=sieze 通过alloc_page_frag拿到skb->head=data=pageskb_free_fr...
but can be extended once we have users for that. The idea is to be able to intercept the packet on skb_release_data(). If it's a buffer coming from our page_pool API recycle it back to the pool for further usage or just release the packet entirely. To achieve that we introduce a...
在eth_type_trans函数中,会将skb->data指针下移14字节skb_pull_inline(skb, ETH_HLEN),如果此时报文带vlan,vlan信息(4个字节)前两个字节为标签协议标识TPID (Tag Protocol ldentifer),值为0x8100,后两个字节为标签控制信息TCI (Tag Control lnformation),那么skb->data指针下移14字节就指向的是TCI控制信息。
[ffff8a727f343d80] skb_release_data at ffffffffba6233ef #11 [ffff8a727f343da8] skb_release_all at ffffffffba6234c4 #12 [ffff8a727f343dc0] napi_consume_skb at ffffffffba623a7f #13 [ffff8a727f343de0] ixgbe_poll at ffffffffc03dd0e0 [ixgbe] #14 [ffff8a727f343e78] net_rx_...