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author | Xin Long <lucien.xin@gmail.com> | 2018-10-15 19:58:29 +0800 |
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committer | David S. Miller <davem@davemloft.net> | 2018-10-15 22:54:20 -0700 |
commit | d805397c3822d57ca3884d4bea37b2291fc40992 (patch) | |
tree | 26a590ccde4580779a2428d6071b87bdc967bfae /fs/btrfs/extent_map.h | |
parent | ec20a63aa8b8ec3223fb25cdb2a49f9f9dfda88c (diff) | |
download | linux-d805397c3822d57ca3884d4bea37b2291fc40992.tar.gz |
sctp: use the pmtu from the icmp packet to update transport pathmtu
Other than asoc pmtu sync from all transports, sctp_assoc_sync_pmtu is also processing transport pmtu_pending by icmp packets. But it's meaningless to use sctp_dst_mtu(t->dst) as new pmtu for a transport. The right pmtu value should come from the icmp packet, and it would be saved into transport->mtu_info in this patch and used later when the pmtu sync happens in sctp_sendmsg_to_asoc or sctp_packet_config. Besides, without this patch, as pmtu can only be updated correctly when receiving a icmp packet and no place is holding sock lock, it will take long time if the sock is busy with sending packets. Note that it doesn't process transport->mtu_info in .release_cb(), as there is no enough information for pmtu update, like for which asoc or transport. It is not worth traversing all asocs to check pmtu_pending. So unlike tcp, sctp does this in tx path, for which mtu_info needs to be atomic_t. 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 'fs/btrfs/extent_map.h')
0 files changed, 0 insertions, 0 deletions