2024 Pskb_expand

Pskb_expand_head

Author: mzey

August undefined, 2024

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 ... 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

[RFC] skb: avoid unnecessary reallocations in __skb_cow - narkive

WebThe 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 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 … download adobe flash projector

Using Netfilter to encapsulate and decapsulate IPv4 Packets

WebFeb 22, 2024 · Hello, I am using up to date Armbian Buster. TP-Link TL-WN722N V1 USB WiFi dongle causes system crashes after kernel upgrade to 5.4.12-meson64 #19.11.8 SMP PREEMPT Thu Jan 16 20:12:23 CET 2024 aarch64 GNU/Linux. Before updating the kernel, I had no such problem. Feb 12 20:17:15 xxx systemd[1]: Fo... Web--- 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. http://testing.blog.chinaunix.net/uid-70012647-id-5859027.html download adobe flash software

Re: [PATCH NET-NEXT] ipv6: skb_expand_head() adjust skb …

Pskb_expand_head

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

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). 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.

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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. … Webreturn pskb_expand_head (skb, ALIGN (delta, NET_SKB_PAD), 0, -- 1.7.3.2 Eric Dumazet 11 years ago ... Nice catch. Scratching my head on this one. Why not the obvious fix ? diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0e50171..b534a1b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h

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 … 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,

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. … Web!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 ---

WebDec 29, 2024 · One weird thing I noticed is that RX queue count is 256, while TX queue count is 8192. It looks like device gets added as eth0 and recognized by udev, but after this crash the machine's entire networking stack becomes broken (there's also motherboard's enp6s0, docker and VirtualBox).

WebFrom: Eric Dumazet To: Eric Dumazet , Christoph Paasch , Vasily Averin clariant media hubWebJan 15, 2015 · At L2, I capture outgoing packets and try to insert a new header after ethernet header. Actually this is the SecTAG. But at the receiver side I cannot see my new header (SecTAG header), what I only see is the original packet. clare woodford brightonWebNAME¶. 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); … download adobe flash terbaruWebApr 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 … download adobe flash reader for androidWebpskb_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 clarex s.aWebAug 2, 2024 · int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, gfp_t gfp_mask); struct sk_buff *skb_realloc_headroom(struct sk_buff *skb, unsigned int headroom); … download adobe flash windows 10This 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. download adobe for all versions