]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
net: skb: introduce kfree_skb_reason()
authorMenglong Dong <imagedong@tencent.com>
Sun, 9 Jan 2022 06:36:26 +0000 (14:36 +0800)
committerJakub Kicinski <kuba@kernel.org>
Mon, 10 Jan 2022 00:30:34 +0000 (16:30 -0800)
commitc504e5c2f9648a1e5c2be01e8c3f59d394192bd3
tree7b0bfa659d35796ab251cccfc8ad6e9ed264df89
parent342402c426902c59491b43d3056a1039e5ca02db
net: skb: introduce kfree_skb_reason()

Introduce the interface kfree_skb_reason(), which is able to pass
the reason why the skb is dropped to 'kfree_skb' tracepoint.

Add the 'reason' field to 'trace_kfree_skb', therefor user can get
more detail information about abnormal skb with 'drop_monitor' or
eBPF.

All drop reasons are defined in the enum 'skb_drop_reason', and
they will be print as string in 'kfree_skb' tracepoint in format
of 'reason: XXX'.

( Maybe the reasons should be defined in a uapi header file, so that
user space can use them? )

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
include/linux/skbuff.h
include/trace/events/skb.h
net/core/dev.c
net/core/drop_monitor.c
net/core/skbuff.c