netdev - [PATCH net-next v2 08/11] bnxt_en: Remove jumbo

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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260113212655.116122-9-alice.kernel@fastmail.im>
Date: Tue, 13 Jan 2026 23:26:52 +0200
From: Alice Mikityanska <alice.kernel@...tmail.im>
To: Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Xin Long <lucien.xin@...il.com>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	David Ahern <dsahern@...nel.org>,
	Nikolay Aleksandrov <razor@...ckwall.org>
Cc: Shuah Khan <shuah@...nel.org>,
	Stanislav Fomichev <stfomichev@...il.com>,
	netdev@...r.kernel.org,
	Alice Mikityanska <alice@...valent.com>
Subject: [PATCH net-next v2 08/11] bnxt_en: Remove jumbo_remove step from TX path

From: Alice Mikityanska <alice@...valent.com>

Now that the kernel doesn't insert HBH for BIG TCP IPv6 packets, remove
unnecessary steps from the bnxt_en TX path, that used to check and
remove HBH.

Signed-off-by: Alice Mikityanska <alice@...valent.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 21 ---------------------
 1 file changed, 21 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index cb78614d4108..6a143dc6cb09 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -517,9 +517,6 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			return NETDEV_TX_BUSY;
 	}
 
-	if (unlikely(ipv6_hopopt_jumbo_remove(skb)))
-		goto tx_free;
-
 	length = skb->len;
 	len = skb_headlen(skb);
 	last_frag = skb_shinfo(skb)->nr_frags;
@@ -13852,7 +13849,6 @@ static bool bnxt_exthdr_check(struct bnxt *bp, struct sk_buff *skb, int nw_off,
 			      u8 **nextp)
 {
 	struct ipv6hdr *ip6h = (struct ipv6hdr *)(skb->data + nw_off);
-	struct hop_jumbo_hdr *jhdr;
 	int hdr_count = 0;
 	u8 *nexthdr;
 	int start;
@@ -13881,24 +13877,7 @@ static bool bnxt_exthdr_check(struct bnxt *bp, struct sk_buff *skb, int nw_off,
 		if (hdrlen > 64)
 			return false;
 
-		/* The ext header may be a hop-by-hop header inserted for
-		 * big TCP purposes. This will be removed before sending
-		 * from NIC, so do not count it.
-		 */
-		if (*nexthdr == NEXTHDR_HOP) {
-			if (likely(skb->len <= GRO_LEGACY_MAX_SIZE))
-				goto increment_hdr;
-
-			jhdr = (struct hop_jumbo_hdr *)hp;
-			if (jhdr->tlv_type != IPV6_TLV_JUMBO || jhdr->hdrlen != 0 ||
-			    jhdr->nexthdr != IPPROTO_TCP)
-				goto increment_hdr;
-
-			goto next_hdr;
-		}
-increment_hdr:
 		hdr_count++;
-next_hdr:
 		nexthdr = &hp->nexthdr;
 		start += hdrlen;
 	}
-- 
2.52.0