Re: [regression] 2.6.37+ commit 0363466866d9.... breaks tcp ipv6

Hans de Bruin
2011-01-18T21:42:03Z

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On 01/18/2011 09:06 PM, Jesse Gross wrote:
> On Tue, Jan 18, 2011 at 11:52 AM, Hans de Bruin<jmdebruin@xmsnet.nl> wrote:
>> On 01/16/2011 09:24 PM, Hans de Bruin wrote:
>>>
>>> After last nights compile i lost the possibility to connect to ssh and
>>> http over ipv6. The connection stops at syn_sent. connections to my
>>> machine end in syn_recv. ping6 still works.
>>>
>>
>> The bisect ended in:
>>
>> 0363466866d901fbc658f4e63dd61e7cc93dd0af is the first bad commit
>> commit 0363466866d901fbc658f4e63dd61e7cc93dd0af
>> Author: Jesse Gross<jesse@nicira.com>
>> Date: Sun Jan 9 06:23:35 2011 +0000
>>
>> net offloading: Convert checksums to use centrally computed features.
>>
>> In order to compute the features for other offloads (primarily
>> scatter/gather), we need to first check the ability of the NIC to
>> offload the checksum for the packet. Since we have already computed
>> this, we can directly use the result instead of figuring it out
>> again.
>>
>> Signed-off-by: Jesse Gross<jesse@nicira.com>
>> Signed-off-by: David S. Miller<davem@davemloft.net>
>>
>>
>> ssh ::1 still works. And since dns still works I guess udp is not affected.
>> My nic is a:
>>
>> 09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit
>> Ethernet PCI Express (rev 02)
>
> Are you using vlans? If so, can you please test this patch?
> http://patchwork.ozlabs.org/patch/79264/
>

No I am not using vlans. The option is even not set in the config file.
Except for the disk less bit is a straightforward setup:

bash-4.1# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
qlen 1000
link/ether 00:1c:23:2d:73:87 brd ff:ff:ff:ff:ff:ff
inet 10.10.0.6/16 brd 10.10.255.255 scope global eth0
inet6 2001:610:76e:0:21c:23ff:fe2d:7387/64 scope global dynamic
valid_lft 86399sec preferred_lft 14399sec
inet6 fe80::21c:23ff:fe2d:7387/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop state DOWN
link/sit 0.0.0.0 brd 0.0.0.0
bash-4.1# ip route show
10.10.0.0/16 dev eth0 proto kernel scope link src 10.10.0.6
default via 10.10.0.1 dev eth0
bash-4.1# ip -6 route show
2001:610:76e::/64 dev eth0 proto kernel metric 256 expires 86404sec
fe80::/64 dev eth0 proto kernel metric 256
ff00::/8 dev eth0 metric 256
default via fe80::230:18ff:feae:75d8 dev eth0 proto kernel metric 1024
expires 29sec hoplimit 64
bash-4.1# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
bash-4.1# ip6tables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
bash-4.1# brctl show
bridge name bridge id STP enabled interfaces
bash-4.1# cat /proc/cmdline
root=/dev/nfs nfsroot=10.10.0.2:/nfs/root/psion/,v3,tcp ro ip=::: ::dhcp
BOOT_IMAGE=nightlybuild-psion

--
Hans

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