diff options
| author | Geliang Tang <geliangtang@gmail.com> | 2021-01-08 16:47:58 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-09 18:18:43 -0800 |
| commit | 40453a5c61f4dc43bbbdbf7cefed4eb1bc8d69b7 (patch) | |
| tree | 94b080da8490b181b03760f94462ff4c3517a525 /net/mptcp/options.c | |
| parent | 067065422fcd625492efb7ba130adb8ac1bd8078 (diff) | |
mptcp: add the incoming MP_PRIO support
This patch added the incoming MP_PRIO logic:
Added a flag named mp_prio in struct mptcp_options_received, to mark the
MP_PRIO is received, and save the priority value to struct
mptcp_options_received's backup member. Then invoke
mptcp_pm_mp_prio_received with the receiving subsocket and the backup
value.
In mptcp_pm_mp_prio_received, get the subflow context according the input
subsocket, and change the subflow's backup as the incoming priority value.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index ef50a8628d77..adfa96dd991c 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -282,6 +282,15 @@ static void mptcp_parse_option(const struct sk_buff *skb, pr_debug("RM_ADDR: id=%d", mp_opt->rm_id); break; + case MPTCPOPT_MP_PRIO: + if (opsize != TCPOLEN_MPTCP_PRIO) + break; + + mp_opt->mp_prio = 1; + mp_opt->backup = *ptr++ & MPTCP_PRIO_BKUP; + pr_debug("MP_PRIO: prio=%d", mp_opt->backup); + break; + case MPTCPOPT_MP_FASTCLOSE: if (opsize != TCPOLEN_MPTCP_FASTCLOSE) break; @@ -313,6 +322,7 @@ void mptcp_get_options(const struct sk_buff *skb, mp_opt->port = 0; mp_opt->rm_addr = 0; mp_opt->dss = 0; + mp_opt->mp_prio = 0; length = (th->doff * 4) - sizeof(struct tcphdr); ptr = (const unsigned char *)(th + 1); @@ -1022,6 +1032,11 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) mp_opt.rm_addr = 0; } + if (mp_opt.mp_prio) { + mptcp_pm_mp_prio_received(sk, mp_opt.backup); + mp_opt.mp_prio = 0; + } + if (!mp_opt.dss) return; |