Messages in this thread | | | From | menglong8.dong@gmail ... | Subject | [PATCH v2 net-next 0/3] net: skb: introduce kfree_skb_with_reason() and use it for tcp and udp | Date | Thu, 30 Dec 2021 17:32:37 +0800 |
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From: Menglong Dong <imagedong@tencent.com>
In this series patch, the interface kfree_skb_with_reason() is introduced(), which is used to collect skb drop reason, and pass it to 'kfree_skb' tracepoint. Therefor, 'drop_monitor' or eBPF is able to monitor abnormal skb with detail reason.
In fact, this series patches are out of the intelligence of David and Steve, I'm just a truck man :/
Previous discussion is here:
https://lore.kernel.org/netdev/20211118105752.1d46e990@gandalf.local.home/ https://lore.kernel.org/netdev/67b36bd8-2477-88ac-83a0-35a1eeaf40c9@gmail.com/
In the first patch, kfree_skb_with_reason() is introduced and the 'reason' field is added to 'kfree_skb' tracepoint. In the second patch, 'kfree_skb()' in replaced with 'kfree_skb_with_reason()' in tcp_v4_rcv(). In the third patch, 'kfree_skb_with_reason()' is used in __udp4_lib_rcv().
Changes since v1: - rename some drop reason, as David suggested - add the third patch
Menglong Dong (3): net: skb: introduce kfree_skb_with_reason() net: skb: use kfree_skb_with_reason() in tcp_v4_rcv() net: skb: use kfree_skb_with_reason() in __udp4_lib_rcv()
include/linux/skbuff.h | 18 +++++++++++++++++ include/trace/events/skb.h | 41 +++++++++++++++++++++++++++++++------- net/core/dev.c | 3 ++- net/core/drop_monitor.c | 10 +++++++--- net/core/skbuff.c | 22 +++++++++++++++++++- net/ipv4/tcp_ipv4.c | 14 ++++++++++--- net/ipv4/udp.c | 10 ++++++++-- 7 files changed, 101 insertions(+), 17 deletions(-)
-- 2.27.0
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