diff options
| author | Radu Rendec <rrendec@redhat.com> | 2024-12-19 11:36:06 -0500 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-12-23 10:11:04 -0800 |
| commit | 623e43c2f5023853cbf71d6a60898d448a06416a (patch) | |
| tree | 7a92e0a708544d07e15817ec13a03defede116a6 /net/bridge/br_input.c | |
| parent | 46e0ccfb88f02ab2eb20a41d519d6e4c028652f2 (diff) | |
net: bridge: add skb drop reasons to the most common drop points
The bridge input code may drop frames for various reasons and at various
points in the ingress handling logic. Currently kfree_skb() is used
everywhere, and therefore no drop reason is specified. Add drop reasons
to the most common drop points.
Drop reasons are not added exhaustively to the entire bridge code. The
intention is to incrementally add drop reasons to the rest of the bridge
code in follow up patches.
Signed-off-by: Radu Rendec <rrendec@redhat.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20241219163606.717758-3-rrendec@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/bridge/br_input.c')
| -rw-r--r-- | net/bridge/br_input.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index ceaa5a89b947..232133a0fd21 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -75,6 +75,7 @@ static int br_pass_frame_up(struct sk_buff *skb, bool promisc) /* note: already called with rcu_read_lock */ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb) { + enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED; struct net_bridge_port *p = br_port_get_rcu(skb->dev); enum br_pkt_type pkt_type = BR_PKT_UNICAST; struct net_bridge_fdb_entry *dst = NULL; @@ -96,8 +97,10 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb if (br_mst_is_enabled(br)) { state = BR_STATE_FORWARDING; } else { - if (p->state == BR_STATE_DISABLED) + if (p->state == BR_STATE_DISABLED) { + reason = SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE; goto drop; + } state = p->state; } @@ -155,8 +158,10 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb } } - if (state == BR_STATE_LEARNING) + if (state == BR_STATE_LEARNING) { + reason = SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE; goto drop; + } BR_INPUT_SKB_CB(skb)->brdev = br->dev; BR_INPUT_SKB_CB(skb)->src_port_isolated = !!(p->flags & BR_ISOLATED); @@ -223,7 +228,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb out: return 0; drop: - kfree_skb(skb); + kfree_skb_reason(skb, reason); goto out; } EXPORT_SYMBOL_GPL(br_handle_frame_finish); @@ -324,6 +329,7 @@ static int br_process_frame_type(struct net_bridge_port *p, */ static rx_handler_result_t br_handle_frame(struct sk_buff **pskb) { + enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED; struct net_bridge_port *p; struct sk_buff *skb = *pskb; const unsigned char *dest = eth_hdr(skb)->h_dest; @@ -331,8 +337,10 @@ static rx_handler_result_t br_handle_frame(struct sk_buff **pskb) if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) return RX_HANDLER_PASS; - if (!is_valid_ether_addr(eth_hdr(skb)->h_source)) + if (!is_valid_ether_addr(eth_hdr(skb)->h_source)) { + reason = SKB_DROP_REASON_MAC_INVALID_SOURCE; goto drop; + } skb = skb_share_check(skb, GFP_ATOMIC); if (!skb) @@ -374,6 +382,7 @@ static rx_handler_result_t br_handle_frame(struct sk_buff **pskb) return RX_HANDLER_PASS; case 0x01: /* IEEE MAC (Pause) */ + reason = SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL; goto drop; case 0x0E: /* 802.1AB LLDP */ @@ -423,8 +432,9 @@ defer_stp_filtering: return nf_hook_bridge_pre(skb, pskb); default: + reason = SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE; drop: - kfree_skb(skb); + kfree_skb_reason(skb, reason); } return RX_HANDLER_CONSUMED; } |