diff options
| author | Geliang Tang <geliang.tang@suse.com> | 2023-11-28 15:18:45 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-11-29 20:06:17 -0800 |
| commit | 6ebf6f90ab4ac09a76172a6d387e8819d3259595 (patch) | |
| tree | 417b99fb849f32bf2bc6f5149ee5898af6a617ec /net/mptcp | |
| parent | 3d6d7549042cbadf252fa32ee1561b5bd2f402ea (diff) | |
mptcp: add mptcpi_subflows_total counter
If the initial subflow has been removed, we cannot know without checking
other counters, e.g. ss -ti <filter> | grep -c tcp-ulp-mptcp or
getsockopt(SOL_MPTCP, MPTCP_FULL_INFO, ...) (or others except MPTCP_INFO
of course) and then check mptcp_subflow_data->num_subflows to get the
total amount of subflows.
This patch adds a new counter mptcpi_subflows_total in mptcpi_flags to
store the total amount of subflows, including the initial one. A new
helper __mptcp_has_initial_subflow() is added to check whether the
initial subflow has been removed or not. With this helper, we can then
compute the total amount of subflows from mptcp_info by doing something
like:
mptcpi_subflows_total = mptcpi_subflows +
__mptcp_has_initial_subflow(msk).
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/428
Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231128-send-net-next-2023107-v4-1-8d6b94150f6b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/protocol.h | 9 | ||||
| -rw-r--r-- | net/mptcp/sockopt.c | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index fe6f2d399ee8..458a2d7bb0dd 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -1072,6 +1072,15 @@ static inline void __mptcp_do_fallback(struct mptcp_sock *msk) set_bit(MPTCP_FALLBACK_DONE, &msk->flags); } +static inline bool __mptcp_has_initial_subflow(const struct mptcp_sock *msk) +{ + struct sock *ssk = READ_ONCE(msk->first); + + return ssk && ((1 << inet_sk_state_load(ssk)) & + (TCPF_ESTABLISHED | TCPF_SYN_SENT | + TCPF_SYN_RECV | TCPF_LISTEN)); +} + static inline void mptcp_do_fallback(struct sock *ssk) { struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index 353680733700..cabe856b2a45 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -938,6 +938,8 @@ void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info) info->mptcpi_bytes_sent = msk->bytes_sent; info->mptcpi_bytes_received = msk->bytes_received; info->mptcpi_bytes_retrans = msk->bytes_retrans; + info->mptcpi_subflows_total = info->mptcpi_subflows + + __mptcp_has_initial_subflow(msk); unlock_sock_fast(sk, slow); } EXPORT_SYMBOL_GPL(mptcp_diag_fill_info); |