hardware with a corresponding
NETIF_F_TSO_ECN can accept them. The GSO engine can either fully segment
the packet, or segment the first MTU and pass the rest to the hardware for
further segmentation.
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On Tue, Jun 27, 2006 at 01:46:35PM -0700, Michael Chan wrote:
On Tue, 2006-06-27 at 22:07 +1000, Herbert Xu wrote:
[NET]: Added GSO header verification
@@ -2166,10 +2166,14 @@ struct sk_buff *tcp_tso_segment(struct s
if (!pskb_may_pull(skb, thlen))
goto out
of protocols defined by the IETF.
See the RDDP WG (http://www.ietf.org/html.charters/rddp-charter.html)
for the Internet Drafts that define the protocols.
Would it be possible for you to give us a quick summary of the relevant
points?
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-charter.html.
Please give more specific reasons for needing these events because it
is certainly far from obvious from reading those documents.
Without reasons these invasive changes may turn out to be completely
inappropriate.
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On Wed, Jun 28, 2006 at 12:54:10PM +1000, Herbert Xu wrote:
Please give more specific reasons for needing these events because it
is certainly far from obvious from reading those documents.
Never mind, I've found your earlier messages on the list which explains
your reasons more clearly
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on the GSO mechanism to pick up the pieces (or
rather generate the pieces as the case may be :)
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the line.
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I must suggest that you turn this check into something
like
if (skb_shinfo(skb)-gso_type)
or even
if (skb_shinfo(skb)-gso_size)
:)
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correctly in both cases.
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/tcpdump and the rest of our stack
while at the same time it is using the same IP address as us and
deciding what packets we will or won't see.
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= SKB_GSO_TCP;
You need to set SKB_GSO_TCPV6 for IPv6 packets here.
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On Fri, Jun 30, 2006 at 09:32:44AM +1000, Herbert Xu wrote:
diff -upNr netdev.org/include/linux/skbuff.h
netdev.ipv6_tso/include/linux/skbuff.h
--- netdev.org/include/linux/skbuff.h 2006-06-27 07:30:36.0 -0700
+++ netdev.ipv6_tso/include/linux/skbuff.h 2006-06-27
07:38
would. Let's reset it in
the per-protocol gso_segment functions.
I didn't verify gso_size because that can be verified by the source of
the dodgy packets.
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diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
Hi:
[IPV6]: Added GSO support for TCPv6
This patch adds GSO support for IPv6 and TCPv6.
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provide a GSO implementation
for their protocol which I think is a fair deal :) For now UFO continues to
live without a GSO implementation which is OK since it doesn't use the sock
caps field at the moment.
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Hi:
[NET]: Verify gso_type too in gso_segment
We don't want nasty Xen guests to pass a TCPv6 packet in with gso_type set
to TCPv4 or even UDP (or a packet that's both TCP and UDP).
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in with gso_type set
to TCPv4 or even UDP (or a packet that's both TCP and UDP).
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sane solution for jumbo packets.
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TSO/TSO6.
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this!
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a new ethtool
helper function for this.
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gives the inherent
features of a device. That can then be used to derive the actual
features in use. That way we won't need to invent a new ethtool
helper function for this.
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Tom Tucker [EMAIL PROTECTED] wrote:
All that said, the proposed patch helps not only iWARP, but other
transports (iSCSI, IB) as well. It is not large, invasive,
Care to explain on how it helps those other technologies?
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MAC and
IP address, then we have the same concerns with it as we do with iWARP or
TOE.
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0f 0
b 69 03 fe 8c 66 c0 e9 69 ff ff ff 0f 0b 6d 04 e8 ab 6c c0 e9 3a ff ff
ff 0f 0b 6c 04 e8 ab 6c c0
0Kernel panic - not syncing: Fatal exception in interrupt
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internally.
Actually, just having it loaded is enough to break TSO. So for all this
time anyone who had ip_nat loaded were silently corrupting all their TSO
checksums!
I'll send a patch soon once I've tested it.
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More
that ai-txq.
Act 2
Enter the ipcalc program. This program calls an ioctl, which ends up
calling udp_ioctl. udp_ioctl does
spin_lock_bh(sk-sk_receive_queue.lock);
Different queue.
So no deadlock. Better luck next time :)
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a little
nicer and allows us to change the primary key for indicating whether an skb
is GSO (if we ever want to do that).
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converted to update the partial checksum instead of
clearing it, this workaround can be removed.
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Hi Dave:
Just joining on the fun on volatile :)
[IPV4] inetpeer: Get rid of volatile from peer_total
The variable peer_total is protected by a lock. The volatile marker
makes no sense. This shaves off 20 bytes on i386.
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you run tcpdump.
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. The only thing I can think of is that it
somehow managed to put some bogus entry into the conntrack table.
What happens if you do
grep 10.49.59.23 /proc/net/ip_conntrack
before and after the tcpdump?
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of the networking community can add input into how
things are done.
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(test_bit(0, work-pending));
This is broken. If the work just starts running before your test_bit
you'd exit without cancelling it properly.
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?
It depends. A mild packet loss problem can become a big one when it
is exacerbated by fragmentation, e.g., a 20% rate can become 40%.
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on that semaphore, I wonder of the box locks up.
We do GFP_KERNEL inside semaphores/mutexes in lots of places. So if this
can deadlock with the oom-killer we probably should fix that, preferably
by having GFP_KERNEL fail in that case.
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which are trying to exit.
Sorry, missed the context.
If there is a deadlock then it's not just this allocation that you
need worry about. There is also an allocation within genlmsg_uniast
that would be GFP_KERNEL.
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to see if it's hitting them.
We need to know if it's being dropped before, in, or after netfilter.
Please also do ip r g 10.49.59.23 to make sure that it says something
sane.
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diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index
show?
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/ip_conntrack when this happens.
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upon the truesize
value of this skb.
Yes that's certainly possible. However, we'll need to audit the few
spots (e.g., ATM) that use truesize without setting skb-sk.
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from the normal networking stack.
Indeed, at least they do have an sk to charge things to :)
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not contain
ip_nat_fn, please let us know.
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sk_stream_mem_reclaim around.
Besides, this function has only been exported since 2004 so it's highly
unlikely for there to be stuff out there using it.
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Stephen Hemminger [EMAIL PROTECTED] wrote:
Why not just use sscanf?
Better yet, use a better interface like netlink rather than module
parameters.
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handling for fib_insert_node call
The error handling around fib_insert_node was broken because we always
zeroed the error before checking it.
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On Wed, Jul 12, 2006 at 09:44:46PM +1000, Herbert Xu wrote:
[IPV4]: Fix error handling for fib_insert_node call
Doh, fogot the patch.
[IPV4]: Fix error handling for fib_insert_node call
The error handling around fib_insert_node was broken because we always
zeroed the error before checking
Ian McDonald [EMAIL PROTECTED] wrote:
__sk_stream_mem_reclaim is only called by sk_stream_mem_reclaim.
As such the check on sk-sk_forward_alloc is not needed and can be removed.
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Acked-by: Herbert Xu [EMAIL PROTECTED]
What's more, even
. For now though, let's do the conservative fix
and update frag_list.
Many thanks to Marco Berizzi for helping me to track down this bug.
This 4-year old bug took 3 months to track down. Marco was very patient
indeed :)
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that it can have highly
non-obvious symptoms.
What happens is that uninitialised uso_size fields can cause packets to
be incorrectly identified as UFO, which means that it does not get
fragmented even if it's over the MTU.
The fix is simple enough.
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because the NFS sockets are not
exported to user-space and therefore #1 can't happen.
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Berizzi.
The following patch should fix the problem for you.
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[NET]: Update frag_list in pskb_trim
they have a tunnel-mode SA with you).
So you need at least 1 more policy on GW1 and 2 policies on GW2
for this to have a chance of working.
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Chris Friesen [EMAIL PROTECTED] wrote:
Herbert Xu wrote:
Either upgrade your kernel or backport the page-splitting code in the
current tree. That's really the only sane solution for jumbo packets.
Looking at the page-splitting code, it says 82571 and greater support
packet-split
keepalives can sit there for all eternity,
if your machine lasts that long :)
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Prior to this change your TSO packets would've gone out with corrupted
checksums silently. Essentially TSO would only slow your machine down
since every transmission it makes has to be retransmitted as non-TSO.
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. Marco was very patient
indeed :)
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Signed-off-by: David S. Miller [EMAIL PROTECTED]
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On Fri, Jul 14, 2006 at 09:54:59AM -0400, James Morris wrote:
Herbert, any review from you on this would be greatly appreciated.
OK, I'll try to have a look tomorrow (I'm GMT-4 at the moment).
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Email: Herbert Xu ~{PmVHI~} [EMAIL PROTECTED
always zero the IPCB-opts in ip_rcv, it is no longer
necessary to do so before calling netif_rx for tunneled packets.
Signed-off-by: Herbert Xu [EMAIL PROTECTED]
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know :)
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as well to avoid copying
the data area of the skb. For now though, let's do the conservative fix
and update frag_list.
Many thanks to Marco Berizzi for helping me to track down this bug.
This 4-year old bug took 3 months to track down. Marco was very patient
indeed :)
Signed-off-by: Herbert Xu
calculate the
checksum for only the first 8 bytes of the payload.
If it does this incorrectly, then it doesn't support RX checksums at
all.
Which NIC is doing this BTW?
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packets to have patial checksums too.
When this is done loopback can send TX CHECKSUM_HW packets instead
of CHECKSUM_UNNECESSARY (I'm currently calling this CHECKSUM_PARTIAL).
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Email: Herbert Xu ~{PmVHI~} [EMAIL PROTECTED]
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need to know the difference between IPv4/IPv6.
In this case it doesn't really matter because AFAIK they're
trying to get switches to notice that the MAC has moved. So
all you need is some packet that the switches can grok.
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. Patches are welcome :)
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Igor V. Liferenko [EMAIL PROTECTED] wrote:
Would you please say why it's 60, and not 52?
The header length / 4 must fit within a single hexadecimal
digit. Therefore the maximum is 15 * 4 = 60.
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for outgoing IPv6 GSO packets
Signed-off-by: Patrick McHardy [EMAIL PROTECTED]
Acked-by: Herbert Xu [EMAIL PROTECTED]
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it's going to try to use the skb as a netlink skb instead :)
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On Tue, Jul 25, 2006 at 06:19:33PM +1000, Herbert Xu wrote:
new kernel:
1.2.3.4
nexthop realm 1 dev dummy0 weight 1
nexthop realm 2 dev dummy1 weight 1
nexthop realm 3 dev dummy2 weight 1
nexthop realm 4 dev dummy3 weight 1
This really looks like
: Herbert Xu ~{PmVHI~} [EMAIL PROTECTED]
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--
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index ba33f86..0a2af08 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1593,6 +1593,7 @@ int
to be excluded, but the IP address needs to be included for NAT).
I have a patch that adds CHECKSUM_COMPLETE/CHECKSUM_PARTIAL if you want
something to work from. Let me know if you want this and I'll bounce it
to you.
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for rt_cache_flush in net/ipv4/fib_hash.c.
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]: Require CAP_NET_ADMIN to create tuntap devices.
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61a015eb86469404587e910e9b852fc35ce436b8
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Email: Herbert Xu ~{PmVHI~} [EMAIL PROTECTED]
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More
.
It doesn't really. However your router might be proxy arping.
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the daemons?
These are valid concerns. However, if we can have things like ntpd
live in user-space without causing nuisance, then addrconf should be
fine as well.
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extricate ourselves easily, we should attempt to come
up with ways of eventually lifting us out. We should also try to
avoid any actions that'll cause us to sink deeper :)
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Email: Herbert Xu ~{PmVHI~} [EMAIL PROTECTED]
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.
Similarly ip6_dst_store users can be divded into those that need to
take the socket dst lock and those that don't. This patch adds
__ip6_dst_store for those (everyone except UDP/datagram) that don't
need an extra lock.
Signed-off-by: Herbert Xu [EMAIL PROTECTED]
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