netdev - [PATCH bpf-next v2 0/3] skmsg: Add the data length in skmsg to SIOCINQ ioctl and rx

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Date: Tue, 21 Nov 2023 19:22:02 +0800
From: Pengcheng Yang <yangpc@...gsu.com>
To: John Fastabend <john.fastabend@...il.com>,
	Jakub Sitnicki <jakub@...udflare.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	bpf@...r.kernel.org,
	netdev@...r.kernel.org
Cc: Pengcheng Yang <yangpc@...gsu.com>
Subject: [PATCH bpf-next v2 0/3] skmsg: Add the data length in skmsg to SIOCINQ ioctl and rx_queue

When using skmsg redirect, the msg is queued in psock->ingress_msg,
and the application calling SIOCINQ ioctl will return a readable
length of 0, and we cannot track the data length of ingress_msg with
the ss tool.

In this patch set, we added the data length in ingress_msg to the 
SIOCINQ ioctl and the rx_queue of tcp_diag.

v2:
- Add READ_ONCE()/WRITE_ONCE() on accesses to psock->msg_len
- Mask out the increment msg_len where its not needed

Pengcheng Yang (3):
  skmsg: Support to get the data length in ingress_msg
  tcp: Add the data length in skmsg to SIOCINQ ioctl
  tcp_diag: Add the data length in skmsg to rx_queue

 include/linux/skmsg.h | 26 ++++++++++++++++++++++++--
 net/core/skmsg.c      | 10 +++++++++-
 net/ipv4/tcp.c        |  3 ++-
 net/ipv4/tcp_diag.c   |  2 ++
 4 files changed, 37 insertions(+), 4 deletions(-)

-- 
2.38.1