diff options
| author | Xin Long <lucien.xin@gmail.com> | 2021-06-22 21:04:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-22 21:28:52 +0300 |
| commit | 7307e4fa4d295f6dc017fe4b19467c486a1275d7 (patch) | |
| tree | a4b22050510689df9fc767ed476c91c0a59bed27 /net/sctp/output.c | |
| parent | 83696408317735d105ad86a5470b39879ad2ec4d (diff) | |
| download | linux-7307e4fa4d295f6dc017fe4b19467c486a1275d7.tar.xz | |
sctp: enable PLPMTUD when the transport is ready
sctp_transport_pl_reset() is called whenever any of these 3 members in
transport is changed:
- probe_interval
- param_flags & SPP_PMTUD_ENABLE
- state == ACTIVE
If all are true, start the PLPMTUD when it's not yet started. If any of
these is false, stop the PLPMTUD when it's already running.
sctp_transport_pl_update() is called when the transport dst has changed.
It will restart the PLPMTUD probe. Again, the pathmtu won't change but
use the dst's mtu until the Search phase is done.
Note that after using PLPMTUD, the pathmtu is only initialized with the
dst mtu when the transport dst changes. At other time it is updated by
pl.pmtu. So sctp_transport_pmtu_check() will be called only when PLPMTUD
is disabled in sctp_packet_config().
After this patch, the PLPMTUD feature from RFC8899 will be activated
and can be used by users.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/output.c')
| -rw-r--r-- | net/sctp/output.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c index ceefb0616d9d..9032ce60d50e 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -103,7 +103,8 @@ void sctp_packet_config(struct sctp_packet *packet, __u32 vtag, sctp_transport_route(tp, NULL, sp); if (asoc->param_flags & SPP_PMTUD_ENABLE) sctp_assoc_sync_pmtu(asoc); - } else if (!sctp_transport_pmtu_check(tp)) { + } else if (!sctp_transport_pl_enabled(tp) && + !sctp_transport_pmtu_check(tp)) { if (asoc->param_flags & SPP_PMTUD_ENABLE) sctp_assoc_sync_pmtu(asoc); } |