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Date: Sat, 5 Feb 2022 15:47:32 +0800 From: menglong8.dong@...il.com To: dsahern@...nel.org, kuba@...nel.org Cc: rostedt@...dmis.org, mingo@...hat.com, davem@...emloft.net, yoshfuji@...ux-ipv6.org, pablo@...filter.org, kadlec@...filter.org, fw@...len.de, edumazet@...gle.com, alobakin@...me, ast@...nel.org, imagedong@...cent.com, pabeni@...hat.com, keescook@...omium.org, talalahmad@...gle.com, haokexin@...il.com, ilias.apalodimas@...aro.org, memxor@...il.com, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, netfilter-devel@...r.kernel.org, coreteam@...filter.org, paulb@...dia.com, cong.wang@...edance.com, mengensun@...cent.com Subject: [PATCH v4 net-next 0/7] net: use kfree_skb_reason() for ip/udp packet receive From: Menglong Dong <imagedong@...cent.com> In this series patches, kfree_skb() is replaced with kfree_skb_reason() during ipv4 and udp4 packet receiving path, and following drop reasons are introduced: SKB_DROP_REASON_SOCKET_FILTER SKB_DROP_REASON_NETFILTER_DROP SKB_DROP_REASON_OTHERHOST SKB_DROP_REASON_IP_CSUM SKB_DROP_REASON_IP_INHDR SKB_DROP_REASON_IP_RPFILTER SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST SKB_DROP_REASON_XFRM_POLICY SKB_DROP_REASON_IP_NOPROTO SKB_DROP_REASON_SOCKET_RCVBUFF SKB_DROP_REASON_PROTO_MEM TCP is more complex, so I left it in the next series. I just figure out how __print_symbolic() works. It doesn't base on the array index, but searching for symbols by loop. So I'm a little afraid it's performance. Changes since v3: - fix some small problems in the third patch (net: ipv4: use kfree_skb_reason() in ip_rcv_core()), as David Ahern said Changes since v2: - use SKB_DROP_REASON_PKT_TOO_SMALL for a path in ip_rcv_core() Changes since v1: - add document for all drop reasons, as David advised - remove unreleated cleanup - remove EARLY_DEMUX and IP_ROUTE_INPUT drop reason - replace {UDP, TCP}_FILTER with SOCKET_FILTER Alex Elder (6): net: ipa: allocate transaction in replenish loop net: ipa: don't use replenish_backlog net: ipa: introduce gsi_channel_trans_idle() net: ipa: kill replenish_backlog net: ipa: replenish after delivering payload net: ipa: determine replenish doorbell differently Menglong Dong (1): net: drop_monitor: support drop reason -- 2.27.0
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