lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 30 Oct 2020 03:49:08 +0200 From: Vladimir Oltean <vladimir.oltean@....com> To: netdev@...r.kernel.org Cc: andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com, kuba@...nel.org, Christian Eggers <ceggers@...i.de>, Kurt Kanzenbach <kurt@...utronix.de> Subject: [PATCH v2 net-next 10/12] net: dsa: tag_dsa: let DSA core deal with TX reallocation Now that we have a central TX reallocation procedure that accounts for the tagger's needed headroom in a generic way, we can remove the skb_cow_head call. Similar to the EtherType DSA tagger, the old Marvell tagger can transform an 802.1Q header if present into a DSA tag, so there is no headroom required in that case. But we are ensuring that it exists, regardless (practically speaking, the headroom must be 4 bytes larger than it needs to be). Signed-off-by: Vladimir Oltean <vladimir.oltean@....com> --- Changes in v2: None. net/dsa/tag_dsa.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index 0b756fae68a5..63d690a0fca6 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -23,9 +23,6 @@ static struct sk_buff *dsa_xmit(struct sk_buff *skb, struct net_device *dev) * the ethertype field for untagged packets. */ if (skb->protocol == htons(ETH_P_8021Q)) { - if (skb_cow_head(skb, 0) < 0) - return NULL; - /* * Construct tagged FROM_CPU DSA tag from 802.1q tag. */ @@ -41,8 +38,6 @@ static struct sk_buff *dsa_xmit(struct sk_buff *skb, struct net_device *dev) dsa_header[2] &= ~0x10; } } else { - if (skb_cow_head(skb, DSA_HLEN) < 0) - return NULL; skb_push(skb, DSA_HLEN); memmove(skb->data, skb->data + DSA_HLEN, 2 * ETH_ALEN); -- 2.25.1
Powered by blists - more mailing lists