Pskb_expand_head
WebApr 23, 2014 · I use pskb_expand_head API to have more headroom for encapsulation. And, then with ip_route_output_key to find the appropriate rtable. Using rtable, I reassign skb->dst and skb->dev. And, then I just go ahead and accept the packet using NF_ACCEPT. skb_dst_drop (skb); skb_dst_set (skb, &rt->dst); skb->dev = skb_dst (skb)->dev; Incoming … WebApr 14, 2011 · The issue I face is that the skb expansion functions (such as copy/clone/expand/reallocate header) allocate a new sk_buff. We can not return this …
Pskb_expand_head
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WebJun 5, 2015 · if (skb_headroom (skb) < sizeof (struct newheader)) { printk ("I got here!\n"); if (pskb_expand_head (skb, sizeof (struct newheader) - skb_headroom (skb), 0, GPF_ATOMIC) != 0) { printk ("And also here\n"); return NF_DROP; } } But … WebThis may happen because of two reasons: - skb_set_owner_w() for newly cloned skb is called too early, before pskb_expand_head() where truesize is adjusted for (!skb-sk) case. - pskb_expand_head() does not adjust truesize in (skb->sk) case. In this case sk->sk_wmem_alloc should be adjusted too. Eric cautions us against increasing …
WebJul 6, 2011 · pskb_expand_head. 2. It is also used HIGHDMA, SG feature bits to enable ZEROCOPY to remove the dependency of a new feature bit, we can add it later when new feature bit is available. It has integrated V6 review comments from Eric Dumazet. 1. Moving ubuf_info object from skb to caller, just use one pointer in WebSome skb have skb->sk set, but the 'reference on socket' is not through sk_wmem_allocIt seems you need a helper to make sure skb->destructor is one ofthe destructors that use …
WebTrims skb to length len. It can change skb pointers. / * 针对skb中存在非线性数据的情形，将skb的数据长度裁减到len长度，最终skb-> len = len * 多余的数据会被clean掉。 int ___pskb_trim (struct sk_buff * skb, ___pskb_trim (struct sk_buff * skb, WebDec 22, 2010 · Every buffer the bond interface received would be shared between the driver and the tcpdump process, thus, resulting in the aforementioned kernel panic. With this …
WebC++ (Cpp) pskb_expand_head - 30 examples found. These are the top rated real world C++ (Cpp) examples of pskb_expand_head extracted from open source projects. You can rate examples to help us improve the quality of examples. Programming Language: C++ (Cpp) Method/Function: pskb_expand_head Examples at hotexamples.com: 30 Example #1 0 …
WebI think you're wrong here. It is 100% equivalent of old code, skb_set_owner_w () handles sk_fullsock (sk) inside and does not adjust sk->sk_wmem_alloc. Please explain if I'm … list of foods to avoid fatty liverWebSep 2, 2024 · From: Vasily Averin To: Eric Dumazet , Christoph Paasch , "David S. Miller" Cc: Hideaki YOSHIFUJI , David Ahern , Jakub Kicinski , netdev … list of foods to avoid if you are constipatedWebUnable to handle kernel paging request at 0000000200000002 RIP: [] pskb_expand_head+0xa8/0x139 Environment Red Hat Enterprise Linux (RHEL) 5.5 imaginext power rangers headquartersWebpskb_expand_head：pskb_expand_head用来扩展skb head的区域，如果nhead, ntail为0，那么相当于复制一个skb head出来. int pskb_expand_head(struct sk_buff *skb, int nhead, … list of foods to avoid while dietingWeb!skb_clone_writable) before then using pskb_expand_head to copy the skb if that is required. There are already some skb_cow_* functions for other conditions, so added this one and changed the call sites. Signed-off-by: Dave Wiltshire --- imaginext power rangers puttyWebpskb_expand_head -- reallocate header of sk_buff Synopsis int pskb_expand_head (struct sk_buff * skb, int nhead, int ntail, int gfp_mask); Arguments skb buffer to reallocate nhead room to add at head ntail room to add at tail gfp_mask allocation priority Description imaginext purple helmetWebpskb_expand_head if (!skb->sk skb->destructor == sock_edemux) skb->truesize += size - osize; If we uses increased truesize adding as delta_truesize, it will be larger than before and even larger than previous total truesize value if skbs in frag_list are abundant. The main skb truesize will become list of foods to avoid on mediterranean diet