diff options
| author |   Matthieu Baerts (NGI0) <matttbe@kernel.org> | 2025-03-06 12:29:27 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2025-03-07 19:39:53 -0800 |
| commit | f5afcb9fbb3984137feb12cb2d2fc6986a8347ac (patch) | |
| tree | d769eb569889225c690f729a46a3b29bace2e472 | |
| parent | Merge branch 'eth-fbnic-support-ring-size-configuration' (diff) | |
| download | wireguard-linux-f5afcb9fbb3984137feb12cb2d2fc6986a8347ac.tar.xz wireguard-linux-f5afcb9fbb3984137feb12cb2d2fc6986a8347ac.zip | |
tcp: ulp: diag: always print the name if any
Since its introduction in commit 61723b393292 ("tcp: ulp: add functions
to dump ulp-specific information"), the ULP diag info have been exported
only if the requester had CAP_NET_ADMIN.
At least the ULP name can be exported without CAP_NET_ADMIN. This will
already help identifying which layer is being used, e.g. which TCP
connections are in fact MPTCP subflow.
Acked-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250306-net-next-tcp-ulp-diag-net-admin-v1-1-06afdd860fc9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/ipv4/tcp_diag.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c index f428ecf9120f..d8bba37dbffd 100644 --- a/net/ipv4/tcp_diag.c +++ b/net/ipv4/tcp_diag.c @@ -83,7 +83,7 @@ static int tcp_diag_put_md5sig(struct sk_buff *skb, #endif static int tcp_diag_put_ulp(struct sk_buff *skb, struct sock *sk, - const struct tcp_ulp_ops *ulp_ops) + const struct tcp_ulp_ops *ulp_ops, bool net_admin) { struct nlattr *nest; int err; @@ -96,7 +96,7 @@ static int tcp_diag_put_ulp(struct sk_buff *skb, struct sock *sk, if (err) goto nla_failure; - if (ulp_ops->get_info) + if (net_admin && ulp_ops->get_info) err = ulp_ops->get_info(sk, skb); if (err) goto nla_failure; @@ -113,6 +113,7 @@ static int tcp_diag_get_aux(struct sock *sk, bool net_admin, struct sk_buff *skb) { struct inet_connection_sock *icsk = inet_csk(sk); + const struct tcp_ulp_ops *ulp_ops; int err = 0; #ifdef CONFIG_TCP_MD5SIG @@ -129,15 +130,13 @@ static int tcp_diag_get_aux(struct sock *sk, bool net_admin, } #endif - if (net_admin) { - const struct tcp_ulp_ops *ulp_ops; - - ulp_ops = icsk->icsk_ulp_ops; - if (ulp_ops) - err = tcp_diag_put_ulp(skb, sk, ulp_ops); - if (err) + ulp_ops = icsk->icsk_ulp_ops; + if (ulp_ops) { + err = tcp_diag_put_ulp(skb, sk, ulp_ops, net_admin); + if (err < 0) return err; } + return 0; } @@ -164,14 +163,14 @@ static size_t tcp_diag_get_aux_size(struct sock *sk, bool net_admin) } #endif - if (net_admin && sk_fullsock(sk)) { + if (sk_fullsock(sk)) { const struct tcp_ulp_ops *ulp_ops; ulp_ops = icsk->icsk_ulp_ops; if (ulp_ops) { size += nla_total_size(0) + nla_total_size(TCP_ULP_NAME_MAX); - if (ulp_ops->get_info_size) + if (net_admin && ulp_ops->get_info_size) size += ulp_ops->get_info_size(sk); } } |