[PATCH v4 3/4] nvmet-tcp: support IPv6 traffic class
From: Geliang Tang <geliang@kernel.org>
Date: 2026-08-18 06:03:56
Also in:
linux-nvme, mptcp
Subsystem:
nvm express target driver, the rest · Maintainers:
Christoph Hellwig, Sagi Grimberg, Chaitanya Kulkarni, Linus Torvalds
From: Geliang Tang <redacted> Currently, nvmet-tcp only applies the received IPv4 TOS value when setting up a queue socket, but does not handle the IPv6 traffic class. Extend the queue socket setup to handle AF_INET6 sockets. Obtain the traffic class from the IPv6 socket's rcv_flowinfo and apply it through IPV6_TCLASS using do_sock_setsockopt(). Signed-off-by: Geliang Tang <redacted> --- drivers/nvme/target/tcp.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 38b0c446ae89..ed413aa5601c 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c@@ -1737,6 +1737,22 @@ static int nvmet_tcp_sock_set_tos(struct sock *sk) return 0; } +static int nvmet_tcp_sock_set_tclass(struct sock *sk) +{ +#if IS_ENABLED(CONFIG_IPV6) + if (sk->sk_family == AF_INET6) { + int tclass = ip6_tclass(inet6_sk(sk)->rcv_flowinfo); + + if (tclass > 0) + return do_sock_setsockopt(sk->sk_socket, false, + SOL_IPV6, IPV6_TCLASS, + KERNEL_SOCKPTR(&tclass), + sizeof(tclass)); + } +#endif + return 0; +} + static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) { struct socket *sock = queue->sock;
@@ -1772,6 +1788,10 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) if (ret) return ret; + ret = nvmet_tcp_sock_set_tclass(sock->sk); + if (ret) + return ret; + ret = 0; write_lock_bh(&sock->sk->sk_callback_lock); if (sock->sk->sk_state != TCP_ESTABLISHED) {
--
2.53.0