diff options
| author |   Hiroaki SHIMODA <shimoda.hiroaki@gmail.com> | 2011-03-09 20:09:58 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-03-13 18:37:49 -0700 |
| commit | 46af31800b6916c92fffa529dc3c357008da957d (patch) | |
| tree | 2c66ee7b78527da504a294f1bd8a2a899623fead /Kbuild | |
| parent | decnet: Convert to use flowidn where applicable. (diff) | |
| download | linux-dev-46af31800b6916c92fffa529dc3c357008da957d.tar.xz linux-dev-46af31800b6916c92fffa529dc3c357008da957d.zip | |
ipv4: Fix PMTU update.
On current net-next-2.6, when Linux receives ICMP Type: 3, Code: 4
(Destination unreachable (Fragmentation needed)),
icmp_unreach
-> ip_rt_frag_needed
(peer->pmtu_expires is set here)
-> tcp_v4_err
-> do_pmtu_discovery
-> ip_rt_update_pmtu
(peer->pmtu_expires is already set,
so check_peer_pmtu is skipped.)
-> check_peer_pmtu
check_peer_pmtu is skipped and MTU is not updated.
To fix this, let check_peer_pmtu execute unconditionally.
And some minor fixes
1) Avoid potential peer->pmtu_expires set to be zero.
2) In check_peer_pmtu, argument of time_before is reversed.
3) check_peer_pmtu expects peer->pmtu_orig is initialized as zero,
but not initialized.
Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions