Pablo Neira Ayuso says:
====================
The following patchset contains Netfilter/IPVS fixes for 3.8-rc7, they are:
* Fix oops in IPVS state-sync due to releasing a random memory area due
to unitialized pointer, from Dan Carpenter.
* Fix SCTP flow establishment due to bad checksumming mangling in IPVS,
from Daniel Borkmann.
* Three fixes for the recently added IPv6 NPT, all from YOSHIFUJI Hideaki,
with an amendment collapsed into those patches from Ulrich Weber. They
fiix adjustment calculation, fix prefix mangling and ensure LSB of
prefixes are zeroes (as required by RFC).
Specifically, it took me a while to validate the 1's complement arithmetics/
checksumming approach in the IPv6 NPT code.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
RFC 6296 points that address bits that are not part of the prefix
has to be zeroed.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Make sure only the bits that are part of the prefix are mangled.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Cast __wsum from/to __sum16 is wrong. Instead, apply appropriate
conversion function: csum_unfold() or csum_fold().
[ The original patch has been modified to undo the final ~ that
csum_fold returns. We only need to fold the 32-bit word that
results from the checksum calculation into a 16-bit to ensure
that the original subnet is restored appropriately. Spotted by
Ulrich Weber. ]
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
ip6gre_tunnel_xmit() is leaking the skb when we hit this error branch,
and the -1 return value from this function is bogus. Use the error
handling we already have in place in ip6gre_tunnel_xmit() for this error
case to fix this.
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch updates LINUX_MIB_LISTENDROPS and LINUX_MIB_LISTENOVERFLOWS in
tcp_v6_conn_request() and tcp_v6_err(). tcp_v6_conn_request() in particular can
drop SYNs for various reasons which are not currently tracked.
Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ip6_datagram_recv_ctl and ip6_datagram_send_ctl are used for handling IPv6
ancillary data. Since ip6_datagram_send_ctl is already publicly exported for
use in modules, ip6_datagram_recv_ctl should also be available to support
ancillary data in the receive path.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The datagram_*_ctl functions in net/ipv6/datagram.c are IPv6-specific. Since
datagram_send_ctl is publicly exported it should be appropriately named to
reflect the fact that it's for IPv6 only.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
They will be created at output, if ever needed. This avoids creating
empty neighbor entries when TPROXYing/Forwarding packets for addresses
that are not even directly reachable.
Note that IPv4 already handles it this way. No neighbor entries are
created for local input.
Tested by myself and customer.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The "Universal/Local" (U/L) bit must be complmented according to RFC4944
and RFC2464.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
We did this for IPv4 in b49d3c1e1c "net: ipmr: limit MRT_TABLE
identifiers" but we need to do it for IPv6 as well. On IPv6 the name
is "pim6reg" instead of "pimreg" so there is one less digit allowed.
The strcpy() is in ip6mr_reg_vif().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steffen Klassert says:
====================
1) The transport header did not point to the right place after
esp/ah processing on tunnel mode in the receive path. As a
result, the ECN field of the inner header was not set correctly,
fixes from Li RongQing.
2) We did a null check too late in one of the xfrm_replay advance
functions. This can lead to a division by zero, fix from
Nickolai Zeldovich.
3) The size calculation of the hash table missed the muiltplication
with the actual struct size when the hash table is freed.
We might call the wrong free function, fix from Michal Kubecek.
4) On IPsec pmtu events we can't access the transport headers of
the original packet, so force a relookup for all routes
to notify about the pmtu event.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
pmtu and redirect events are now handled in the protocols error handler,
so add an error handler for icmp6 to do this. It is needed in the case
when we have no socket context. Based on a patch by Duan Jiong.
Reported-by: Duan Jiong <djduanjiong@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 299b0767 (ipv6: Fix IPsec slowpath fragmentation problem)
has introduced a error in the header length calculation that
provokes corrupted packets when non-fragmentable extensions
headers (Destination Option or Routing Header Type 2) are used.
rt->rt6i_nfheader_len is the length of the non-fragmentable
extension header, and it should be substracted to
rt->dst.header_len, and not to exthdrlen, as it was done before
commit 299b0767.
This patch reverts to the original and correct behavior. It has
been successfully tested with and without IPsec on packets
that include non-fragmentable extensions headers.
Signed-off-by: Romain Kuntz <r.kuntz@ipflavors.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Replace ip6_route_lookup() with addrconf_get_prefix_route() when
looking up for a prefix route. This ensures that the connected prefix
is looked up in the main table, and avoids the selection of other
matching routes located in different tables as well as blackhole
or prohibited entries.
In addition, this fixes an Opps introduced by commit 64c6d08e (ipv6:
del unreachable route when an addr is deleted on lo), that would occur
when a blackhole or prohibited entry is selected by ip6_route_lookup().
Such entries have a NULL rt6i_table argument, which is accessed by
__ip6_del_rt() when trying to lock rt6i_table->tb6_lock.
The function addrconf_is_prefix_route() is not used anymore and is
removed.
[v2] Minor indentation cleanup and log updates.
Signed-off-by: Romain Kuntz <r.kuntz@ipflavors.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The tests on the flags in addrconf_get_prefix_route() does no make
much sense: the 'noflags' parameter contains the set of flags that
must not match with the route flags, so the test must be done
against 'noflags', and not against 'flags'.
Signed-off-by: Romain Kuntz <r.kuntz@ipflavors.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
IPsec tunnel does not set ECN field to CE in inner header when
the ECN field in the outer header is CE, and the ECN field in
the inner header is ECT(0) or ECT(1).
The cause is ipip6_hdr() does not return the correct address of
inner header since skb->transport-header is not the inner header
after esp6_input_done2(), or ah6_input().
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
csum16_add() has a broken carry detection, should be:
sum += sum < (__force u16)b;
Instead of fixing csum16_add, remove the custom checksum
functions and use the generic csum_add/csum_sub ones.
Signed-off-by: Ulrich Weber <ulrich.weber@sophos.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Pablo Neira Ayuso says:
====================
The following batch contains Netfilter fixes for 3.8-rc1. They are
a mixture of old bugs that have passed unnoticed (I'll pass these to
stable) and more fresh ones from the previous merge window, they are:
* Fix for MAC address in 6in4 tunnels via NFLOG that results in ulogd
showing up wrong address, from Bob Hockney.
* Fix a comment in nf_conntrack_ipv6, from Florent Fourcot.
* Fix a leak an error path in ctnetlink while creating an expectation,
from Jesper Juhl.
* Fix missing ICMP time exceeded in the IPv6 defragmentation code, from
Haibo Xi.
* Fix inconsistent handling of routing changes in MASQUERADE for the
new connections case, from Andrew Collins.
* Fix a missing skb_reset_transport in ip[6]t_REJECT that leads to
crashes in the ixgbe driver (since it seems to access the transport
header with TSO enabled), from Mukund Jampala.
* Recover obsoleted NOTRACK target by including it into the CT and spot
a warning via printk about being obsoleted. Many people don't check the
scheduled to be removal file under Documentation, so we follow some
less agressive approach to kill this in a year or so. Spotted by Florian
Westphal, patch from myself.
* Fix race condition in xt_hashlimit that allows to create two or more
entries, from myself.
* Fix crash if the CT is used due to the recently added facilities to
consult the dying and unconfirmed conntrack lists, from myself.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
ip6gre_xmit2() incorrectly sets transport header to inner payload
instead of GRE header. It seems copy-and-pasted from ipip.c.
Set transport header to gre header.
(In ipip case the transport header is the inner ip header, so that's
correct.)
Found by inspection. In practice the incorrect transport header
doesn't matter because the skb usually is sent to another net_device
or socket, so the transport header isn't referenced.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
the value of err is always negative if it goes to errout, so we don't need to
check the value of err.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit b836c99fd6 (ipv6: unify conntrack reassembly expire
code with standard one) use the standard IPv6 reassembly
code(ip6_expire_frag_queue) to handle conntrack reassembly expire.
In ip6_expire_frag_queue, it invoke dev_get_by_index_rcu to get
which device received this expired packet.so we must save ifindex
when NF_conntrack get this packet.
With this patch applied, I can see ICMP Time Exceeded sent
from the receiver when the sender sent out 1/2 fragmented
IPv6 packet.
Signed-off-by: Haibo Xi <haibbo@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Remove ambiguity of double negation.
Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr>
Acked-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Since (a0ecb85 netfilter: nf_nat: Handle routing changes in MASQUERADE
target), the MASQUERADE target handles routing changes which affect
the output interface of a connection, but only for ESTABLISHED
connections. It is also possible for NEW connections which
already have a conntrack entry to be affected by routing changes.
This adds a check to drop entries in the NEW+conntrack state
when the oif has changed.
Signed-off-by: Andrew Collins <bsderandrew@gmail.com>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
The following commit breaks IPv6 TCP transmission for me:
Commit 75fe83c322
Author: Vlad Yasevich <vyasevic@redhat.com>
Date: Fri Nov 16 09:41:21 2012 +0000
ipv6: Preserve ipv6 functionality needed by NET
This patch fixes the typo "ipv6_offload" which should be
"ipv6-offload".
I don't know why not including the offload modules should
break TCP. Disabling all offload options on the NIC didn't
help. Outgoing pulseaudio traffic kept stalling.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
If in either of the above functions inet_csk_route_child_sock() or
__inet_inherit_port() fails, the newsk will not be freed:
unreferenced object 0xffff88022e8a92c0 (size 1592):
comm "softirq", pid 0, jiffies 4294946244 (age 726.160s)
hex dump (first 32 bytes):
0a 01 01 01 0a 01 01 02 00 00 00 00 a7 cc 16 00 ................
02 00 03 01 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8153d190>] kmemleak_alloc+0x21/0x3e
[<ffffffff810ab3e7>] kmem_cache_alloc+0xb5/0xc5
[<ffffffff8149b65b>] sk_prot_alloc.isra.53+0x2b/0xcd
[<ffffffff8149b784>] sk_clone_lock+0x16/0x21e
[<ffffffff814d711a>] inet_csk_clone_lock+0x10/0x7b
[<ffffffff814ebbc3>] tcp_create_openreq_child+0x21/0x481
[<ffffffff814e8fa5>] tcp_v4_syn_recv_sock+0x3a/0x23b
[<ffffffff814ec5ba>] tcp_check_req+0x29f/0x416
[<ffffffff814e8e10>] tcp_v4_do_rcv+0x161/0x2bc
[<ffffffff814eb917>] tcp_v4_rcv+0x6c9/0x701
[<ffffffff814cea9f>] ip_local_deliver_finish+0x70/0xc4
[<ffffffff814cec20>] ip_local_deliver+0x4e/0x7f
[<ffffffff814ce9f8>] ip_rcv_finish+0x1fc/0x233
[<ffffffff814cee68>] ip_rcv+0x217/0x267
[<ffffffff814a7bbe>] __netif_receive_skb+0x49e/0x553
[<ffffffff814a7cc3>] netif_receive_skb+0x50/0x82
This happens, because sk_clone_lock initializes sk_refcnt to 2, and thus
a single sock_put() is not enough to free the memory. Additionally, things
like xfrm, memcg, cookie_values,... may have been initialized.
We have to free them properly.
This is fixed by forcing a call to tcp_done(), ending up in
inet_csk_destroy_sock, doing the final sock_put(). tcp_done() is necessary,
because it ends up doing all the cleanup on xfrm, memcg, cookie_values,
xfrm,...
Before calling tcp_done, we have to set the socket to SOCK_DEAD, to
force it entering inet_csk_destroy_sock. To avoid the warning in
inet_csk_destroy_sock, inet_num has to be set to 0.
As inet_csk_destroy_sock does a dec on orphan_count, we first have to
increase it.
Calling tcp_done() allows us to remove the calls to
tcp_clear_xmit_timer() and tcp_cleanup_congestion_control().
A similar approach is taken for dccp by calling dccp_done().
This is in the kernel since 093d282321 (tproxy: fix hash locking issue
when using port redirection in __inet_inherit_port()), thus since
version >= 2.6.37.
Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
In function ndisc_redirect_rcv(), the skb->data points to the transport
header, but function icmpv6_notify() need the skb->data points to the
inner IP packet. So before using icmpv6_notify() to propagate redirect,
change skb->data to point the inner IP packet that triggered the sending
of the Redirect, and introduce struct rd_msg to make it easy.
Signed-off-by: Duan Jiong <djduanjiong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a natural number n exists where 2 + data_len <= 8n < 2 + data_len + pad,
post padding is not initialized correctly.
(Un)fortunately, the only type that requires pad is Infiniband,
whose pad is 2 and data_len is 20, and this logical error has not
become obvious, but it is better to fix.
Note that ndisc_opt_addr_space() handles the situation described
above correctly.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
These symbols were exported for bonding device by commit 305d552a
("bonding: send IPv6 neighbor advertisement on failover").
It bacame obsolete by commit 7c899432 ("bonding, ipv4, ipv6, vlan: Handle
NETDEV_BONDING_FAILOVER like NETDEV_NOTIFY_PEERS") and removed by
commit 4f5762ec ("bonding: Remove obsolete source file 'bond_ipv6.c'").
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv6_sock_mc_close() is called for ipv6 sockets at close time, and most
of them don't use multicast.
Add a test to avoid contention on a shared spinlock.
Same heuristic applies for ipv6_sock_ac_close(), to avoid contention
on a shared rwlock.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We talk about IPv6, hence the family is RTNL_FAMILY_IP6MR!
rtnl_register() is already called with RTNL_FAMILY_IP6MR.
The bug is here since the beginning of this function (commit 5b285cac35).
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch allows to monitor mf6c activities via rtnetlink.
To avoid parsing two times the mf6c oifs, we use maxvif to allocate the rtnl
msg, thus we may allocate some superfluous space.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
/proc/net/ip[6]_mr_cache allows to get all mfc entries, even if they are put in
the unresolved list (mfc[6]_unres_queue). But only the table RT_TABLE_DEFAULT is
displayed.
This patch adds the parsing of the unresolved list when the dump is made via
rtnetlink, hence each table can be checked.
In IPv6, we set rtm_type in ip6mr_fill_mroute(), because in case of unresolved
mfc __ip6mr_fill_mroute() will not set it. In IPv4, it is already done.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A mfc entry can be static or not (added via the mroute_sk socket). The patch
reports MFC_STATIC flag into rtm_protocol by setting rtm_protocol to
RTPROT_STATIC or RTPROT_MROUTED.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
These statistics can be checked only via /proc/net/ip_mr_cache or
SIOCGETSGCNT[_IN6] and thus only for the table RT_TABLE_DEFAULT.
Advertising them via rtnetlink allows to get statistics for all cache entries,
whatever the table is.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch removes the skb manipulations when nested attributes are added by
using standard helpers.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch advertise the MC_FORWARDING status for IPv4 and IPv6.
This field is readonly, only multicast engine in the kernel updates it.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
* Remove limitation in the maximum number of supported sets in ipset.
Now ipset automagically increments the number of slots in the array
of sets by 64 new spare slots, from Jozsef Kadlecsik.
* Partially remove the generic queue infrastructure now that ip_queue
is gone. Its only client is nfnetlink_queue now, from Florian
Westphal.
* Add missing attribute policy checkings in ctnetlink, from Florian
Westphal.
* Automagically kill conntrack entries that use the wrong output
interface for the masquerading case in case of routing changes,
from Jozsef Kadlecsik.
* Two patches two improve ct object traceability. Now ct objects are
always placed in any of the existing lists. This allows us to dump
the content of unconfirmed and dying conntracks via ctnetlink as
a way to provide more instrumentation in case you suspect leaks,
from myself.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
I believe this commit from 2008 was incorrect:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=398bcbebb6f721ac308df1e3d658c0029bb74503
When CONFIG_IPV6_ROUTER_PREF is disabled, the kernel should follow
RFC4861 section 6.3.6: if no route is NUD_VALID, then traffic should be
sprayed across all routers (indirectly triggering NUD) until one of them
becomes NUD_VALID.
However, the following experiment demonstrates that this does not work:
1) Connect to an IPv6 network.
2) Change the router's MAC (and link-local) address.
The kernel will lock onto the first router and never try the new one, even
if the first becomes unreachable. This patch fixes the problem by
allowing rt6_check_neigh() to return 0; if all routers return 0, then
rt6_select() will fall back to round-robin behavior.
This patch should have no effect when CONFIG_IPV6_ROUTER_PREF=y.
Note that rt6_check_neigh() is only used in a boolean context, so I've
changed its return type accordingly.
Signed-off-by: Paul Marks <pmarks@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As of 026359b [ipv6: Send ICMPv6 RSes only when RAs are accepted],
Router Solicitations are sent whenever kernel accepts Router
Advertisements on the interface.
However, this logic isn't reflected in 'addrconf_rs_timer'.
The timer fails to issue subsequent RS messages (and fails to re-arm
itself) if forwarding is enabled and the special hybrid mode is
enabled (accept_ra=2).
Fix the condition determining whether next RS should be sent, by using
'ipv6_accept_ra()'.
Reported-by: Ami Koren <amikoren@yahoo.com>
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the route changes (backup default route, VPNs) which affect a
masqueraded target, the packets were sent out with the outdated source
address. The patch addresses the issue by comparing the outgoing interface
directly with the masqueraded interface in the nat table.
Events are inefficient in this case, because it'd require adding route
events to the network core and then scanning the whole conntrack table
and re-checking the route for all entry.
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
As of 026359b [ipv6: Send ICMPv6 RSes only when RAs are accepted], the
logic determining whether to send Router Solicitations is identical
to the logic determining whether kernel accepts Router Advertisements.
However the condition itself is repeated in several code locations.
Unify it by introducing 'ipv6_accept_ra()' accessor.
Also, simplify the condition expression, making it more readable.
No semantic change.
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
commit 68835aba4d (net: optimize INET input path further)
moved some fields used for tcp/udp sockets lookup in the first cache
line of struct sock_common.
This patch moves inet_dport/inet_num as well, filling a 32bit hole
on 64 bit arches and reducing number of cache line misses in lookups.
Also change INET_MATCH()/INET_TW_MATCH() to perform the ports match
before addresses match, as this check is more discriminant.
Remove the hash check from MATCH() macros because we dont need to
re validate the hash value after taking a refcount on socket, and
use likely/unlikely compiler hints, as the sk_hash/hash check
makes the following conditional tests 100% predicted by cpu.
Introduce skc_addrpair/skc_portpair pair values to better
document the alignment requirements of the port/addr pairs
used in the various MATCH() macros, and remove some casts.
The namespace check can also be done at last.
This slightly improves TCP/UDP lookup times.
IP/TCP early demux needs inet->rx_dst_ifindex and
TCP needs inet->min_ttl, lets group them together in same cache line.
With help from Ben Hutchings & Joe Perches.
Idea of this patch came after Ling Ma proposal to move skc_hash
to the beginning of struct sock_common, and should allow him
to submit a final version of his patch. My tests show an improvement
doing so.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Joe Perches <joe@perches.com>
Cc: Ling Ma <ling.ma.program@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts:
net/ipv6/exthdrs_core.c
Jesse Gross says:
====================
This series of improvements for 3.8/net-next contains four components:
* Support for modifying IPv6 headers
* Support for matching and setting skb->mark for better integration with
things like iptables
* Ability to recognize the EtherType for RARP packets
* Two small performance enhancements
The movement of ipv6_find_hdr() into exthdrs_core.c causes two small merge
conflicts. I left it as is but can do the merge if you want. The conflicts
are:
* ipv6_find_hdr() and ipv6_find_tlv() were both moved to the bottom of
exthdrs_core.c. Both should stay.
* A new use of ipv6_find_hdr() was added to net/netfilter/ipvs/ip_vs_core.c
after this patch. The IPVS user has two instances of the old constant
name IP6T_FH_F_FRAG which has been renamed to IP6_FH_F_FRAG.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch reports the change made by Stephen Hemminger in ipip and gre[6] in
commit eccc1bb8d4 (tunnel: drop packet if ECN present with not-ECT).
Goal is to handle RFC6040, Section 4.2:
Default Tunnel Egress Behaviour.
o If the inner ECN field is Not-ECT, the decapsulator MUST NOT
propagate any other ECN codepoint onwards. This is because the
inner Not-ECT marking is set by transports that rely on dropped
packets as an indication of congestion and would not understand or
respond to any other ECN codepoint [RFC4774]. Specifically:
* If the inner ECN field is Not-ECT and the outer ECN field is
CE, the decapsulator MUST drop the packet.
* If the inner ECN field is Not-ECT and the outer ECN field is
Not-ECT, ECT(0), or ECT(1), the decapsulator MUST forward the
outgoing packet with the ECN field cleared to Not-ECT.
The patch takes benefits from common function added in net/inet_ecn.h.
Like it was done for Xin4 tunnels, it adds logging to allow detecting broken
systems that set ECN bits incorrectly when tunneling (or an intermediate
router might be changing the header). Errors are also tracked via
rx_frame_error.
CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Save a few bytes per table by convert mroute_do_assert and
mroute_do_pim from int to bool.
Remove !! as the compiler does that when assigning int to bool.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts:
drivers/net/wireless/iwlwifi/pcie/tx.c
Minor iwlwifi conflict in TX queue disabling between 'net', which
removed a bogus warning, and 'net-next' which added some status
register poking code.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller