2024 Pskb_expand

Pskb_expand_head

Author: qozz

August undefined, 2024

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 … WebAug 2, 2024 · + pskb_expand_head (skb, SKB_DATA_ALIGN (delta), 0, GFP_ATOMIC)) { + kfree_skb (skb); + skb = NULL; + } + return skb; +} +EXPORT_SYMBOL (skb_expand_head); …

[PATCH 3/3] skbuff: Added new helper function skb_cow_clone_head.

Web*RFC net-next v2 0/3] page_pool: allow caching from safely localized NAPI @ 2024-04-05 23:20 Jakub Kicinski 2024-04-05 23:20 ` [RFC net-next v2 1/3] net: skb: plumb napi state thru skb freeing paths Jakub Kicinski ` (2 more replies) 0 siblings, 3 replies; 9+ messages in thread From: Jakub Kicinski @ 2024-04-05 23:20 UTC (permalink / raw ... WebAug 18, 2024 · bpf_skb_pull_data ends up calling pskb_expand_head in the kernel, which clarifies the impact: Expands (or creates identical copy, if @nhead and @ntail are zero) header of @skb. [...] All the pointers pointing into skb header may change and must be reloaded after call to this function. It is therefore expected that the data and data_end … hairstyles for 60 year old black women

Linux-Kernel Archive: [PATCH 5.15 159/262] net: fix up skbs delta ...

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, WebFrom: Eric Dumazet To: Eric Dumazet , Christoph Paasch , Vasily Averin hairstyles for 6th grade black girls

[SOLVED][Odroid C2] Wifi AR9271 causes kernel crash after upgrade

[PATCH V8 0/4 net-next] macvtap/vhost TX zero-copy support

WebNAME¶. pskb_expand_head - reallocate header of sk_buff. SYNOPSIS¶. int pskb_expand_head(struct sk_buff * skb, int nhead, int ntail, gfp_t gfp_mask); … 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 … hairstyles for 60+ ladies with thin hairWebSep 2, 2024 · From: Vasily Averin To: Eric Dumazet , Christoph Paasch , "David S. Miller" Cc: Hideaki YOSHIFUJI , David Ahern , Jakub Kicinski , netdev … hairstyles for 63 year old woman

"Webint pskb_expand_head (struct sk_buff * skb, int nhead, int ntail, gfp_t gfp_mask); Arguments. skb. buffer to reallocate nhead. room to add at head ntail. room to add at tail gfp_mask. … " - Pskb_expand_head

Pskb_expand_head

How can I safely append data to a sk_buff for IPTables target

WebFeb 8, 2012 · When skb_copy/skb_copy_expand is called followed by dev_kfree_skb causes kernel crash Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). 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 …

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WebApr 11, 2024 · page_pool: allow caching from safely localized NAPI expand [net-next,0/3] page_pool: allow caching from safely localized NAPI [net-next,1/3] net: skb: plumb napi state thru skb freeing paths WebThese 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. …

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 … WebAug 29, 2024 · This 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.

Webpskb_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, … WebMar 1, 2024 · use ksize(len) to calculate truesize while pskb_expand_head uses. skb_segment_list. err = skb_unclone(nskb, GFP_ATOMIC); pskb_expand_head. if (!skb->sk …

WebIt seems I've found the reason: before my change pskb_expand_head() is called for newly cloned skb where sk was not set. after my change skb->sk is set before following pskb_expand_head() call On own turn pskb_expand_head() adjust truesize: net/core/skbuff.c::pskb_expand_head() 1751 /* It is not generally safe to change skb …

WebAug 23, 2024 · >>> it seems to me skb_realloc_headroom used before my patch called pskb_expand_head() too >>> and did not adjusted skb->truesize too. Am I missed something perhaps? >>> >>> The only difference in my patch is that skb_clone can be not called, bullet soul vs infinite burstWebThe change 'mac80211: Fix BUG in pskb_expand_head when transmitting shared skbs' added a check for copying the skb if it's shared, however the tx info variable still points at the cb of the old skb Signed-off-by: Felix Fietkau Acked-by: Helmut Schaa bullet spacer toolWebDefined in 1 files as a prototype: include/linux/skbuff.h, line 1040 (as a prototype) Defined in 1 files as a function: net/core/skbuff.c, line 1441 (as a function) Documented in hairstyles for 60 years of ageWeb--- Christoph Paasch reports [1] about incorrect skb->truesize after skb_expand_head() call in ip6_xmit. This 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. bullet sound wavWebpskb_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 hairstyles for 68 year old womanWebJun 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 … hairstyles for 6 month old baby girlWebApr 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 … bulletspassview 64 bit download