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[bpf,v2,0/7] sock_map: some bug fixes and improvements

Message ID 20210522191411.21446-1-xiyou.wangcong@gmail.com
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Series sock_map: some bug fixes and improvements | expand

Message

Cong Wang May 22, 2021, 7:14 p.m. UTC 
From: Cong Wang <cong.wang@bytedance.com>

This patchset contains a few bug fixes and improvements for sock_map.

Patch 1 improves recvmsg() accuracy for UDP, patch 2 improves UDP
non-blocking read() by retrying on EAGAIN. With both of them, the
failure rate of the UDP test case goes down from 10% to 0%.

Patch 3 is memory leak fix I posted, no change since v1. The rest
patches address similar memory leaks or improve error handling,
including one increases sk_drops counter in error cases. Please
check each patch description for more details.

---
Cong Wang (7):
  skmsg: improve udp_bpf_recvmsg() accuracy
  selftests/bpf: Retry for EAGAIN in udp_redir_to_connected()
  udp: fix a memory leak in udp_read_sock()
  skmsg: fix a memory leak in sk_psock_verdict_apply()
  skmsg: teach sk_psock_verdict_apply() to return errors
  skmsg: pass source psock to sk_psock_skb_redirect()
  skmsg: increase sk->sk_drops when dropping packets

 include/linux/skmsg.h                         |  2 -
 net/core/skmsg.c                              | 80 +++++++++----------
 net/ipv4/tcp_bpf.c                            | 24 +++++-
 net/ipv4/udp.c                                |  2 +
 net/ipv4/udp_bpf.c                            | 47 +++++++++--
 .../selftests/bpf/prog_tests/sockmap_listen.c |  7 +-
 6 files changed, 109 insertions(+), 53 deletions(-)