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* | | | ipv6: slight optimization in ip6_dst_gcLi RongQing2014-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | entries is always greater than rt_max_size here, since if entries is less than rt_max_size, the fib6_run_gc function will be skipped Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: tunnels - enable module autoloadingTom Gundersen2014-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable the module alias hookup to allow tunnel modules to be autoloaded on demand. This is in line with how most other netdev kinds work, and will allow userspace to create tunnels without having CAP_SYS_MODULE. Signed-off-by: Tom Gundersen <teg@jklm.no> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | vti6: delete unneeded call to netdev_privJulia Lawall2014-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Netdev_priv is an accessor function, and has no purpose if its result is not used. A simplified version of the semantic match that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ local idexpression x; @@ -x = netdev_priv(...); ... when != x // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | snmp: fix some left over of snmp statsWANG Cong2014-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fengguang reported the following sparse warning: >> net/ipv6/proc.c:198:41: sparse: incorrect type in argument 1 (different address spaces) net/ipv6/proc.c:198:41: expected void [noderef] <asn:3>*mib net/ipv6/proc.c:198:41: got void [noderef] <asn:3>**pcpumib Fixes: commit 698365fa1874aa7635d51667a3 (net: clean up snmp stats code) Reported-by: Fengguang Wu <fengguang.wu@intel.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: support marking accepting TCP socketsLorenzo Colitti2014-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using mark-based routing, sockets returned from accept() may need to be marked differently depending on the incoming connection request. This is the case, for example, if different socket marks identify different networks: a listening socket may want to accept connections from all networks, but each connection should be marked with the network that the request came in on, so that subsequent packets are sent on the correct network. This patch adds a sysctl to mark TCP sockets based on the fwmark of the incoming SYN packet. If enabled, and an unmarked socket receives a SYN, then the SYN packet's fwmark is written to the connection's inet_request_sock, and later written back to the accepted socket when the connection is established. If the socket already has a nonzero mark, then the behaviour is the same as it is today, i.e., the listening socket's fwmark is used. Black-box tested using user-mode linux: - IPv4/IPv6 SYN+ACK, FIN, etc. packets are routed based on the mark of the incoming SYN packet. - The socket returned by accept() is marked with the mark of the incoming SYN packet. - Tested with syncookies=1 and syncookies=2. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: Use fwmark reflection in PMTU discovery.Lorenzo Colitti2014-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, routing lookups used for Path PMTU Discovery in absence of a socket or on unmarked sockets use a mark of 0. This causes PMTUD not to work when using routing based on netfilter fwmark mangling and fwmark ip rules, such as: iptables -j MARK --set-mark 17 ip rule add fwmark 17 lookup 100 This patch causes these route lookups to use the fwmark from the received ICMP error when the fwmark_reflect sysctl is enabled. This allows the administrator to make PMTUD work by configuring appropriate fwmark rules to mark the inbound ICMP packets. Black-box tested using user-mode linux by pointing different fwmarks at routing tables egressing on different interfaces, and using iptables mangling to mark packets inbound on each interface with the interface's fwmark. ICMPv4 and ICMPv6 PMTU discovery work as expected when mark reflection is enabled and fail when it is disabled. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: add a sysctl to reflect the fwmark on repliesLorenzo Colitti2014-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kernel-originated IP packets that have no user socket associated with them (e.g., ICMP errors and echo replies, TCP RSTs, etc.) are emitted with a mark of zero. Add a sysctl to make them have the same mark as the packet they are replying to. This allows an administrator that wishes to do so to use mark-based routing, firewalling, etc. for these replies by marking the original packets inbound. Tested using user-mode linux: - ICMP/ICMPv6 echo replies and errors. - TCP RST packets (IPv4 and IPv6). Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | tcp: IPv6 support for fastopen serverDaniel Lee2014-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After all the preparatory works, supporting IPv6 in Fast Open is now easy. We pretty much just mirror v4 code. The only difference is how we generate the Fast Open cookie for IPv6 sockets. Since Fast Open cookie is 128 bits and we use AES 128, we use CBC-MAC to encrypt both the source and destination IPv6 addresses since the cookie is a MAC tag. Signed-off-by: Daniel Lee <longinus00@gmail.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Jerry Chu <hkchu@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | tcp: improve fastopen icmp handlingYuchung Cheng2014-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a fast open socket is already accepted by the user, it should be treated like a connected socket to record the ICMP error in sk_softerr, so the user can fetch it. Do that in both tcp_v4_err and tcp_v6_err. Also refactor the sequence window check to improve readability (e.g., there were two local variables named 'req'). Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Daniel Lee <longinus00@gmail.com> Signed-off-by: Jerry Chu <hkchu@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: rename local_df to ignore_dfWANG Cong2014-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As suggested by several people, rename local_df to ignore_df, since it means "ignore df bit if it is set". Cc: Maciej Żenczykowski <maze@google.com> Cc: Florian Westphal <fw@strlen.de> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2014-05-12
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/ethernet/altera/altera_sgdma.c net/netlink/af_netlink.c net/sched/cls_api.c net/sched/sch_api.c The netlink conflict dealt with moving to netlink_capable() and netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations in non-init namespaces. These were simple transformations from netlink_capable to netlink_ns_capable. The Altera driver conflict was simply code removal overlapping some void pointer cast cleanups in net-next. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller2014-05-09
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following batch contains netfilter fixes for your net tree, they are: 1) Fix use after free in nfnetlink when sending a batch for some unsupported subsystem, from Denys Fedoryshchenko. 2) Skip autoload of the nat module if no binding is specified via ctnetlink, from Florian Westphal. 3) Set local_df after netfilter defragmentation to avoid a bogus ICMP fragmentation needed in the forwarding path, also from Florian. 4) Fix potential user after free in ip6_route_me_harder() when returning the error code to the upper layers, from Sergey Popovich. 5) Skip possible bogus ICMP time exceeded emitted from the router (not valid according to RFC) if conntrack zones are used, from Vasily Averin. 6) Fix fragment handling when nf_defrag_ipv4 is loaded but nf_conntrack is not present, also from Vasily. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | netfilter: Fix potential use after free in ip6_route_me_harder()Sergey Popovich2014-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dst is released one line before we access it again with dst->error. Fixes: 58e35d147128 netfilter: ipv6: propagate routing errors from ip6_route_me_harder() Signed-off-by: Sergey Popovich <popovich_sergei@mail.ru> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | | | net: ipv6: send pkttoobig immediately if orig frag size > mtuFlorian Westphal2014-05-07
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If conntrack defragments incoming ipv6 frags it stores largest original frag size in ip6cb and sets ->local_df. We must thus first test the largest original frag size vs. mtu, and not vice versa. Without this patch PKTTOOBIG is still generated in ip6_fragment() later in the stack, but 1) IPSTATS_MIB_INTOOBIGERRORS won't increment 2) packet did (needlessly) traverse netfilter postrouting hook. Fixes: fe6cc55f3a9 ("net: ip, ipv6: handle gso skbs in forwarding path") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net: ipv6: more places need LOOPBACK_IFINDEX for flowi6_iifJulian Anastasov2014-04-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To properly match iif in ip rules we have to provide LOOPBACK_IFINDEX in flowi6_iif, not 0. Some ip6mr_fib_lookup and fib6_rule_lookup callers need such fix. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | ipv6: fib: fix fib dump restartKumar Sundararajan2014-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the ipv6 fib changes during a table dump, the walk is restarted and the number of nodes dumped are skipped. But the existing code doesn't advance to the next node after a node is skipped. This can cause the dump to loop or produce lots of duplicates when the fib is modified during the dump. This change advances the walk to the next node if the current node is skipped after a restart. Signed-off-by: Kumar Sundararajan <kumar@fb.com> Signed-off-by: Chris Mason <clm@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ipv6: remove parameter rt from fib6_prune_clones()Duan Jiong2014-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the parameter rt will be assigned to c.arg in function fib6_clean_tree(), but function fib6_prune_clone() doesn't use c.arg, so we can remove it safely. Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: Verify UDP checksum before handoff to encapTom Herbert2014-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Moving validation of UDP checksum to be done in UDP not encap layer. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | icmp6: Call skb_checksum_validateTom Herbert2014-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use skb_checksum_validate to verify checksum. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | gre6: Call skb_checksum_simple_validateTom Herbert2014-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use skb_checksum_simple_validate to verify checksum. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: clean up snmp stats codeWANG Cong2014-05-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 8f0ea0fe3a036a47767f9c80e (snmp: reduce percpu needs by 50%) reduced snmp array size to 1, so technically it doesn't have to be an array any more. What's more, after the following commit: commit 933393f58fef9963eac61db8093689544e29a600 Date: Thu Dec 22 11:58:51 2011 -0600 percpu: Remove irqsafe_cpu_xxx variants We simply say that regular this_cpu use must be safe regardless of preemption and interrupt state. That has no material change for x86 and s390 implementations of this_cpu operations. However, arches that do not provide their own implementation for this_cpu operations will now get code generated that disables interrupts instead of preemption. probably no arch wants to have SNMP_ARRAY_SZ == 2. At least after almost 3 years, no one complains. So, just convert the array to a single pointer and remove snmp_mib_init() and snmp_mib_free() as well. Cc: Christoph Lameter <cl@linux.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ipv6: Need to sock_put on csum errorTom Herbert2014-05-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4068579e1e098fa81d48db9ba4432ab664c58561 ("net: Implmement RFC 6936 (zero RX csums for UDP/IPv6)") introduced zero checksums being allowed for IPv6, but in the case that a socket disallows a zero checksum on RX we need to sock_put. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ipv6: remove unused function ipv6_inherit_linklocal()WANG Cong2014-05-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is no longer used after commit e837735ec406a347756e (ip6_tunnel: ensure to always have a link local address). Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: Implmement RFC 6936 (zero RX csums for UDP/IPv6)Tom Herbert2014-05-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RFC 6936 relaxes the requirement of RFC 2460 that UDP/IPv6 packets which are received with a zero UDP checksum value must be dropped. RFC 6936 allows zero checksums to support tunnels over UDP. When sk_no_check is set we allow on a socket we allow a zero IPv6 UDP checksum. This is for both sending zero checksum and accepting a zero checksum on receive. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: Call skb_checksum_init in IPv6Tom Herbert2014-05-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Call skb_checksum_init instead of private functions. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | net: ipv6: Introduce ip6_sk_dst_hoplimit.Lorenzo Colitti2014-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This replaces 6 identical code snippets with a call to a new static inline function. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ip6gre: add x-netns supportNicolas Dichtel2014-04-23
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch allows to switch the netns when packet is encapsulated or decapsulated. In other word, the encapsulated packet is received in a netns, where the lookup is done to find the tunnel. Once the tunnel is found, the packet is decapsulated and injecting into the corresponding interface which stands to another netns. When one of the two netns is removed, the tunnel is destroyed. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | ipv6: support IFA_F_MANAGETEMPADDR for address deletion tooHeiner Kallweit2014-04-22
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Userspace applications can use IFA_F_MANAGETEMPADDR with RTM_NEWADDR already to indicate that the kernel should take care of temporary address management. This patch adds related functionality to RTM_DELADDR. By setting IFA_F_MANAGETEMPADDR a userspace application can indicate that the kernel should delete all related temporary addresses as well. A corresponding patch for the "ip addr del" command has been applied to iproute2 already. Signed-off-by: Heiner Kallweit <heiner.kallweit@web.de> Reviewed-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ip6_tunnel: use the right netns in ioctl handlerNicolas Dichtel2014-04-16
| | | | | | | | | | | | | | | | Because the netdevice may be in another netns than the i/o netns, we should use the i/o netns instead of dev_net(dev). Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sit: use the right netns in ioctl handlerNicolas Dichtel2014-04-16
| | | | | | | | | | | | | | | | | | | | | | Because the netdevice may be in another netns than the i/o netns, we should use the i/o netns instead of dev_net(dev). Note that netdev_priv(dev) cannot bu NULL, hence we can remove these useless checks. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iifCong Wang2014-04-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As suggested by Julian: Simply, flowi4_iif must not contain 0, it does not look logical to ignore all ip rules with specified iif. because in fib_rule_match() we do: if (rule->iifindex && (rule->iifindex != fl->flowi_iif)) goto out; flowi4_iif should be LOOPBACK_IFINDEX by default. We need to move LOOPBACK_IFINDEX to include/net/flow.h: 1) It is mostly used by flowi_iif 2) Fix the following compile error if we use it in flow.h by the patches latter: In file included from include/linux/netfilter.h:277:0, from include/net/netns/netfilter.h:5, from include/net/net_namespace.h:21, from include/linux/netdevice.h:43, from include/linux/icmpv6.h:12, from include/linux/ipv6.h:61, from include/net/ipv6.h:16, from include/linux/sunrpc/clnt.h:27, from include/linux/nfs_fs.h:30, from init/do_mounts.c:32: include/net/flow.h: In function ‘flowi4_init_output’: include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function) Cc: Eric Biederman <ebiederm@xmission.com> Cc: Julian Anastasov <ja@ssi.bg> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ip6_gre: don't allow to remove the fb_tunnel_devNicolas Dichtel2014-04-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's possible to remove the FB tunnel with the command 'ip link del ip6gre0' but this is unsafe, the module always supposes that this device exists. For example, ip6gre_tunnel_lookup() may use it unconditionally. Let's add a rtnl handler for dellink, which will never remove the FB tunnel (we let ip6gre_destroy_tunnels() do the job). Introduced by commit c12b395a4664 ("gre: Support GRE over IPv6"). CC: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: add a sock pointer to dst->output() path.Eric Dumazet2014-04-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the dst->output() path for ipv4, the code assumes the skb it has to transmit is attached to an inet socket, specifically via ip_mc_output() : The sk_mc_loop() test triggers a WARN_ON() when the provider of the packet is an AF_PACKET socket. The dst->output() method gets an additional 'struct sock *sk' parameter. This needs a cascade of changes so that this parameter can be propagated from vxlan to final consumer. Fixes: 8f646c922d55 ("vxlan: keep original skb ownership") Reported-by: lucien xin <lucien.xin@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: add a sock pointer to ip_queue_xmit()Eric Dumazet2014-04-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ip_queue_xmit() assumes the skb it has to transmit is attached to an inet socket. Commit 31c70d5956fc ("l2tp: keep original skb ownership") changed l2tp to not change skb ownership and thus broke this assumption. One fix is to add a new 'struct sock *sk' parameter to ip_queue_xmit(), so that we do not assume skb->sk points to the socket used by l2tp tunnel. Fixes: 31c70d5956fc ("l2tp: keep original skb ownership") Reported-by: Zhan Jianyu <nasa4836@gmail.com> Tested-by: Zhan Jianyu <nasa4836@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: Limit mtu to 65575 bytesEric Dumazet2014-04-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Francois reported that setting big mtu on loopback device could prevent tcp sessions making progress. We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets. We must limit the IPv6 MTU to (65535 + 40) bytes in theory. Tested: ifconfig lo mtu 70000 netperf -H ::1 Before patch : Throughput : 0.05 Mbits After patch : Throughput : 35484 Mbits Reported-by: Francois WELLENREITER <f.wellenreiter@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipv6: Fix oif in TCP SYN+ACK route lookup.Lorenzo Colitti2014-04-11
|/ | | | | | | | | | | | | | | | | | | | | | net-next commit 9c76a11, ipv6: tcp_ipv6 policy route issue, had a boolean logic error that caused incorrect behaviour for TCP SYN+ACK when oif-based rules are in use. Specifically: 1. If a SYN comes in from a global address, and sk_bound_dev_if is not set, the routing lookup has oif set to the interface the SYN came in on. Instead, it should have oif unset, because for global addresses, the incoming interface doesn't necessarily have any bearing on the interface the SYN+ACK is sent out on. 2. If a SYN comes in from a link-local address, and sk_bound_dev_if is set, the routing lookup has oif set to the interface the SYN came in on. Instead, it should have oif set to sk_bound_dev_if, because that's what the application requested. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* netfilter: Can't fail and free after table replacementThomas Graf2014-04-05
| | | | | | | | | | | | | | | | All xtables variants suffer from the defect that the copy_to_user() to copy the counters to user memory may fail after the table has already been exchanged and thus exposed. Return an error at this point will result in freeing the already exposed table. Any subsequent packet processing will result in a kernel panic. We can't copy the counters before exposing the new tables as we want provide the counter state after the old table has been unhooked. Therefore convert this into a silent error. Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* ipv6: some ipv6 statistic counters failed to disable bhHannes Frederic Sowa2014-03-31
| | | | | | | | | | | | | | | | | | | | | | | After commit c15b1ccadb323ea ("ipv6: move DAD and addrconf_verify processing to workqueue") some counters are now updated in process context and thus need to disable bh before doing so, otherwise deadlocks can happen on 32-bit archs. Fabio Estevam noticed this while while mounting a NFS volume on an ARM board. As a compensation for missing this I looked after the other *_STATS_BH and found three other calls which need updating: 1) icmp6_send: ip6_fragment -> icmpv6_send -> icmp6_send (error handling) 2) ip6_push_pending_frames: rawv6_sendmsg -> rawv6_push_pending_frames -> ... (only in case of icmp protocol with raw sockets in error handling) 3) ping6_v6_sendmsg (error handling) Fixes: c15b1ccadb323ea ("ipv6: move DAD and addrconf_verify processing to workqueue") Reported-by: Fabio Estevam <festevam@gmail.com> Tested-by: Fabio Estevam <fabio.estevam@freescale.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: strengthen fallback fragmentation id generationHannes Frederic Sowa2014-03-31
| | | | | | | | | | | | | | | | | | | | | | First off, we don't need to check for non-NULL rt any more, as we are guaranteed to always get a valid rt6_info. Drop the check. In case we couldn't allocate an inet_peer for fragmentation information we currently generate strictly incrementing fragmentation ids for all destination. This is done to maximize the cycle and avoid collisions. Those fragmentation ids are very predictable. At least we should try to mix in the destination address. While it should make no difference to simply use a PRNG at this point, secure_ipv6_id ensures that we don't leak information from prandom, so its internal state could be recoverable. This fallback function should normally not get used thus this should not affect performance at all. It is just meant as a safety net. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: tcp_ipv6 policy route issueWang Yufen2014-03-31
| | | | | | | | | | | | The issue raises when adding policy route, specify a particular NIC as oif, the policy route did not take effect. The reason is that fl6.oif is not set and route map failed. From the tcp_v6_send_response function, if the binding address is linklocal, fl6.oif is set, but not for global address. Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: reuse rt6_need_strictWang Yufen2014-03-31
| | | | | | | | Move the whole rt6_need_strict as static inline into ip6_route.h, so that it can be reused Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: tcp_ipv6 do some cleanupWang Yufen2014-03-31
| | | | | Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2014-03-29
|\ | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/ethernet/marvell/mvneta.c The mvneta.c conflict is a case of overlapping changes, a conversion to devm_ioremap_resource() vs. a conversion to netdev_alloc_pcpu_stats. Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv6: move DAD and addrconf_verify processing to workqueueHannes Frederic Sowa2014-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | addrconf_join_solict and addrconf_join_anycast may cause actions which need rtnl locked, especially on first address creation. A new DAD state is introduced which defers processing of the initial DAD processing into a workqueue. To get rtnl lock we need to push the code paths which depend on those calls up to workqueues, specifically addrconf_verify and the DAD processing. (v2) addrconf_dad_failure needs to be queued up to the workqueue, too. This patch introduces a new DAD state and stop the DAD processing in the workqueue (this is because of the possible ipv6_del_addr processing which removes the solicited multicast address from the device). addrconf_verify_lock is removed, too. After the transition it is not needed any more. As we are not processing in bottom half anymore we need to be a bit more careful about disabling bottom half out when we lock spin_locks which are also used in bh. Relevant backtrace: [ 541.030090] RTNL: assertion failed at net/core/dev.c (4496) [ 541.031143] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G O 3.10.33-1-amd64-vyatta #1 [ 541.031145] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 541.031146] ffffffff8148a9f0 000000000000002f ffffffff813c98c1 ffff88007c4451f8 [ 541.031148] 0000000000000000 0000000000000000 ffffffff813d3540 ffff88007fc03d18 [ 541.031150] 0000880000000006 ffff88007c445000 ffffffffa0194160 0000000000000000 [ 541.031152] Call Trace: [ 541.031153] <IRQ> [<ffffffff8148a9f0>] ? dump_stack+0xd/0x17 [ 541.031180] [<ffffffff813c98c1>] ? __dev_set_promiscuity+0x101/0x180 [ 541.031183] [<ffffffff813d3540>] ? __hw_addr_create_ex+0x60/0xc0 [ 541.031185] [<ffffffff813cfe1a>] ? __dev_set_rx_mode+0xaa/0xc0 [ 541.031189] [<ffffffff813d3a81>] ? __dev_mc_add+0x61/0x90 [ 541.031198] [<ffffffffa01dcf9c>] ? igmp6_group_added+0xfc/0x1a0 [ipv6] [ 541.031208] [<ffffffff8111237b>] ? kmem_cache_alloc+0xcb/0xd0 [ 541.031212] [<ffffffffa01ddcd7>] ? ipv6_dev_mc_inc+0x267/0x300 [ipv6] [ 541.031216] [<ffffffffa01c2fae>] ? addrconf_join_solict+0x2e/0x40 [ipv6] [ 541.031219] [<ffffffffa01ba2e9>] ? ipv6_dev_ac_inc+0x159/0x1f0 [ipv6] [ 541.031223] [<ffffffffa01c0772>] ? addrconf_join_anycast+0x92/0xa0 [ipv6] [ 541.031226] [<ffffffffa01c311e>] ? __ipv6_ifa_notify+0x11e/0x1e0 [ipv6] [ 541.031229] [<ffffffffa01c3213>] ? ipv6_ifa_notify+0x33/0x50 [ipv6] [ 541.031233] [<ffffffffa01c36c8>] ? addrconf_dad_completed+0x28/0x100 [ipv6] [ 541.031241] [<ffffffff81075c1d>] ? task_cputime+0x2d/0x50 [ 541.031244] [<ffffffffa01c38d6>] ? addrconf_dad_timer+0x136/0x150 [ipv6] [ 541.031247] [<ffffffffa01c37a0>] ? addrconf_dad_completed+0x100/0x100 [ipv6] [ 541.031255] [<ffffffff8105313a>] ? call_timer_fn.isra.22+0x2a/0x90 [ 541.031258] [<ffffffffa01c37a0>] ? addrconf_dad_completed+0x100/0x100 [ipv6] Hunks and backtrace stolen from a patch by Stephen Hemminger. Reported-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: fix checkpatch errors of "foo*" and "foo * bar"Wang Yufen2014-03-29
| | | | | | | | | | | | | | | | | | | | ERROR: "(foo*)" should be "(foo *)" ERROR: "foo * bar" should be "foo *bar" Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Wang Yufen <wangyufen@huawei.com> Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: fix checkpatch errors of brace and trailing statementsWang Yufen2014-03-29
| | | | | | | | | | | | | | | | | | ERROR: open brace '{' following enum go on the same line ERROR: open brace '{' following struct go on the same line ERROR: trailing statements should be on next line Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: fix checkpatch errors comments and spaceWang Yufen2014-03-29
| | | | | | | | | | | | | | | | | | | | | | WARNING: please, no space before tabs WARNING: please, no spaces at the start of a line ERROR: spaces required around that ':' (ctx:VxW) ERROR: spaces required around that '>' (ctx:VxV) ERROR: spaces required around that '>=' (ctx:VxV) Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: do not overwrite inetpeer metrics prematurelyMichal Kubeček2014-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an IPv6 host route with metrics exists, an attempt to add a new route for the same target with different metrics fails but rewrites the metrics anyway: 12sp0:~ # ip route add fec0::1 dev eth0 rto_min 1000 12sp0:~ # ip -6 route show fe80::/64 dev eth0 proto kernel metric 256 fec0::1 dev eth0 metric 1024 rto_min lock 1s 12sp0:~ # ip route add fec0::1 dev eth0 rto_min 1500 RTNETLINK answers: File exists 12sp0:~ # ip -6 route show fe80::/64 dev eth0 proto kernel metric 256 fec0::1 dev eth0 metric 1024 rto_min lock 1.5s This is caused by all IPv6 host routes using the metrics in their inetpeer (or the shared default). This also holds for the new route created in ip6_route_add() which shares the metrics with the already existing route and thus ip6_route_add() rewrites the metrics even if the new route ends up not being used at all. Another problem is that old metrics in inetpeer can reappear unexpectedly for a new route, e.g. 12sp0:~ # ip route add fec0::1 dev eth0 rto_min 1000 12sp0:~ # ip route del fec0::1 12sp0:~ # ip route add fec0::1 dev eth0 12sp0:~ # ip route change fec0::1 dev eth0 hoplimit 10 12sp0:~ # ip -6 route show fe80::/64 dev eth0 proto kernel metric 256 fec0::1 dev eth0 metric 1024 hoplimit 10 rto_min lock 1s Resolve the first problem by moving the setting of metrics down into fib6_add_rt2node() to the point we are sure we are inserting the new route into the tree. Second problem is addressed by introducing new flag DST_METRICS_FORCE_OVERWRITE which is set for a new host route in ip6_route_add() and makes ipv6_cow_metrics() always overwrite the metrics in inetpeer (even if they are not "new"); it is reset after that. v5: use a flag in _metrics member rather than one in flags v4: fix a typo making a condition always true (thanks to Hannes Frederic Sowa) v3: rewritten based on David Miller's idea to move setting the metrics (and allocation in non-host case) down to the point we already know the route is to be inserted. Also rebased to net-next as it is quite late in the cycle. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2014-03-25
|\| | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: Documentation/devicetree/bindings/net/micrel-ks8851.txt net/core/netpoll.c The net/core/netpoll.c conflict is a bug fix in 'net' happening to code which is completely removed in 'net-next'. In micrel-ks8851.txt we simply have overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
| * ip6mr: fix mfc notification flagsNicolas Dichtel2014-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 812e44dd1829 ("ip6mr: advertise new mfc entries via rtnl") reuses the function ip6mr_fill_mroute() to notify mfc events. But this function was used only for dump and thus was always setting the flag NLM_F_MULTI, which is wrong in case of a single notification. Libraries like libnl will wait forever for NLMSG_DONE. CC: Thomas Graf <tgraf@suug.ch> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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