From: Menglong Dong <imagedong@xxxxxxxxxxx>
In the commit c504e5c2f964 ("net: skb: introduce kfree_skb_reason()"),
we added the support of reporting the reasons of skb drops to kfree_skb
tracepoint. And in this series patches, reasons for skb drops are added
to the link layer, which means that 'net/core/dev.c' is our target.
Following functions are processed:
sch_handle_egress()
__dev_xmit_skb()
enqueue_to_backlog()
do_xdp_generic()
sch_handle_ingress()
__netif_receive_skb_core()
and following new drop reasons are added (what they mean can be see in
the document of them):
SKB_DROP_REASON_TC_EGRESS
SKB_DROP_REASON_QDISC_DROP
SKB_DROP_REASON_CPU_BACKLOG
SKB_DROP_REASON_XDP
SKB_DROP_REASON_TC_INGRESS
SKB_DROP_REASON_PTYPE_ABSENT
In order to add skb drop reasons to kfree_skb_list(), the function
kfree_skb_list_reason() is introduced in the 2th patch, which will be
used in __dev_xmit_skb() in the 3th patch.
Changes since v1:
- rename SKB_DROP_REASON_QDISC_EGRESS to SKB_DROP_REASON_TC_EGRESS in the
1th patch
- remove the 'else' in the 4th patch
- rename SKB_DROP_REASON_QDISC_INGRESS to SKB_DROP_REASON_TC_INGRESS in
the 6th patch
Menglong Dong (7):
net: dev: use kfree_skb_reason() for sch_handle_egress()
net: skb: introduce the function kfree_skb_list_reason()
net: dev: add skb drop reasons to __dev_xmit_skb()
net: dev: use kfree_skb_reason() for enqueue_to_backlog()
net: dev: use kfree_skb_reason() for do_xdp_generic()
net: dev: use kfree_skb_reason() for sch_handle_ingress()
net: dev: use kfree_skb_reason() for __netif_receive_skb_core()
include/linux/skbuff.h | 26 +++++++++++++++++++++++++-
include/trace/events/skb.h | 6 ++++++
net/core/dev.c | 24 +++++++++++++++---------
net/core/skbuff.c | 7 ++++---
4 files changed, 50 insertions(+), 13 deletions(-)
--
2.35.1
