diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/744-v5.15-net-dsa-don-t-set-skb-offload_fwd_mark-when-not-offl.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/744-v5.15-net-dsa-don-t-set-skb-offload_fwd_mark-when-not-offl.patch | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/target/linux/generic/backport-5.10/744-v5.15-net-dsa-don-t-set-skb-offload_fwd_mark-when-not-offl.patch b/target/linux/generic/backport-5.10/744-v5.15-net-dsa-don-t-set-skb-offload_fwd_mark-when-not-offl.patch deleted file mode 100644 index 51f87904ef..0000000000 --- a/target/linux/generic/backport-5.10/744-v5.15-net-dsa-don-t-set-skb-offload_fwd_mark-when-not-offl.patch +++ /dev/null @@ -1,138 +0,0 @@ -From bea7907837c57a0aaac009931eb14efb056dafab Mon Sep 17 00:00:00 2001 -From: Vladimir Oltean <vladimir.oltean@nxp.com> -Date: Thu, 29 Jul 2021 17:56:00 +0300 -Subject: [PATCH] net: dsa: don't set skb->offload_fwd_mark when not offloading - the bridge - -DSA has gained the recent ability to deal gracefully with upper -interfaces it cannot offload, such as the bridge, bonding or team -drivers. When such uppers exist, the ports are still in standalone mode -as far as the hardware is concerned. - -But when we deliver packets to the software bridge in order for that to -do the forwarding, there is an unpleasant surprise in that the bridge -will refuse to forward them. This is because we unconditionally set -skb->offload_fwd_mark = true, meaning that the bridge thinks the frames -were already forwarded in hardware by us. - -Since dp->bridge_dev is populated only when there is hardware offload -for it, but not in the software fallback case, let's introduce a new -helper that can be called from the tagger data path which sets the -skb->offload_fwd_mark accordingly to zero when there is no hardware -offload for bridging. This lets the bridge forward packets back to other -interfaces of our switch, if needed. - -Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> -Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - net/dsa/dsa_priv.h | 14 ++++++++++++++ - net/dsa/tag_brcm.c | 4 ++-- - net/dsa/tag_dsa.c | 15 +++++++++++---- - net/dsa/tag_ksz.c | 2 +- - net/dsa/tag_lan9303.c | 3 ++- - net/dsa/tag_mtk.c | 2 +- - net/dsa/tag_ocelot.c | 2 +- - net/dsa/tag_rtl4_a.c | 2 +- - net/dsa/tag_sja1105.c | 20 ++++++++++++++------ - 9 files changed, 47 insertions(+), 17 deletions(-) - ---- a/net/dsa/dsa_priv.h -+++ b/net/dsa/dsa_priv.h -@@ -266,6 +266,20 @@ static inline struct sk_buff *dsa_untag_ - return skb; - } - -+/* If the ingress port offloads the bridge, we mark the frame as autonomously -+ * forwarded by hardware, so the software bridge doesn't forward in twice, back -+ * to us, because we already did. However, if we're in fallback mode and we do -+ * software bridging, we are not offloading it, therefore the dp->bridge_dev -+ * pointer is not populated, and flooding needs to be done by software (we are -+ * effectively operating in standalone ports mode). -+ */ -+static inline void dsa_default_offload_fwd_mark(struct sk_buff *skb) -+{ -+ struct dsa_port *dp = dsa_slave_to_port(skb->dev); -+ -+ skb->offload_fwd_mark = !!(dp->bridge_dev); -+} -+ - /* switch.c */ - int dsa_switch_register_notifier(struct dsa_switch *ds); - void dsa_switch_unregister_notifier(struct dsa_switch *ds); ---- a/net/dsa/tag_brcm.c -+++ b/net/dsa/tag_brcm.c -@@ -166,7 +166,7 @@ static struct sk_buff *brcm_tag_rcv_ll(s - /* Remove Broadcom tag and update checksum */ - skb_pull_rcsum(skb, BRCM_TAG_LEN); - -- skb->offload_fwd_mark = 1; -+ dsa_default_offload_fwd_mark(skb); - - return skb; - } -@@ -270,7 +270,7 @@ static struct sk_buff *brcm_leg_tag_rcv( - /* Remove Broadcom tag and update checksum */ - skb_pull_rcsum(skb, BRCM_LEG_TAG_LEN); - -- skb->offload_fwd_mark = 1; -+ dsa_default_offload_fwd_mark(skb); - - /* Move the Ethernet DA and SA */ - memmove(skb->data - ETH_HLEN, ---- a/net/dsa/tag_ksz.c -+++ b/net/dsa/tag_ksz.c -@@ -25,7 +25,7 @@ static struct sk_buff *ksz_common_rcv(st - if (pskb_trim_rcsum(skb, skb->len - len)) - return NULL; - -- skb->offload_fwd_mark = true; -+ dsa_default_offload_fwd_mark(skb); - - return skb; - } ---- a/net/dsa/tag_lan9303.c -+++ b/net/dsa/tag_lan9303.c -@@ -115,7 +115,8 @@ static struct sk_buff *lan9303_rcv(struc - skb_pull_rcsum(skb, 2 + 2); - memmove(skb->data - ETH_HLEN, skb->data - (ETH_HLEN + LAN9303_TAG_LEN), - 2 * ETH_ALEN); -- skb->offload_fwd_mark = !(lan9303_tag1 & LAN9303_TAG_RX_TRAPPED_TO_CPU); -+ if (!(lan9303_tag1 & LAN9303_TAG_RX_TRAPPED_TO_CPU)) -+ dsa_default_offload_fwd_mark(skb); - - return skb; - } ---- a/net/dsa/tag_mtk.c -+++ b/net/dsa/tag_mtk.c -@@ -104,7 +104,7 @@ static struct sk_buff *mtk_tag_rcv(struc - - /* Only unicast or broadcast frames are offloaded */ - if (likely(!is_multicast_skb)) -- skb->offload_fwd_mark = 1; -+ dsa_default_offload_fwd_mark(skb); - - return skb; - } ---- a/net/dsa/tag_ocelot.c -+++ b/net/dsa/tag_ocelot.c -@@ -225,7 +225,7 @@ static struct sk_buff *ocelot_rcv(struct - */ - return NULL; - -- skb->offload_fwd_mark = 1; -+ dsa_default_offload_fwd_mark(skb); - skb->priority = qos_class; - - /* Ocelot switches copy frames unmodified to the CPU. However, it is ---- a/net/dsa/tag_rtl4_a.c -+++ b/net/dsa/tag_rtl4_a.c -@@ -115,7 +115,7 @@ static struct sk_buff *rtl4a_tag_rcv(str - skb->data - ETH_HLEN - RTL4_A_HDR_LEN, - 2 * ETH_ALEN); - -- skb->offload_fwd_mark = 1; -+ dsa_default_offload_fwd_mark(skb); - - return skb; - } |