[PATCH v3 3/4] nvmet-tcp: support IPv6 traffic class
From: Geliang Tang <geliang@kernel.org>
Date: 2026-08-16 01:01:21
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 | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index e64592b79257..d34249cf3756 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c@@ -1735,6 +1735,20 @@ static void nvmet_tcp_sock_set_tos(struct sock *sk) KERNEL_SOCKPTR(&tos), sizeof(tos)); } +static void nvmet_tcp_sock_set_tclass(struct sock *sk) +{ +#if IS_ENABLED(CONFIG_IPV6) + if (sk->sk_family == AF_INET6) { + u8 tclass = ip6_tclass(inet6_sk(sk)->rcv_flowinfo); + + if (tclass > 0) + do_sock_setsockopt(sk->sk_socket, false, SOL_IPV6, + IPV6_TCLASS, KERNEL_SOCKPTR(&tclass), + sizeof(tclass)); + } +#endif +} + static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) { struct socket *sock = queue->sock;
@@ -1762,6 +1776,7 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) /* Set socket type of service */ nvmet_tcp_sock_set_tos(sock->sk); + nvmet_tcp_sock_set_tclass(sock->sk); ret = 0; write_lock_bh(&sock->sk->sk_callback_lock);
--
2.53.0