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2009-03-24ipv6: Fix conflict resolutions during ipv6 bindingVlad Yasevich
The ipv6 version of bind_conflict code calls ipv6_rcv_saddr_equal() which at times wrongly identified intersections between addresses. It particularly broke down under a few instances and caused erroneous bind conflicts. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ipv6: Make v4-mapped bindings consistent with IPv4Vlad Yasevich
Binding to a v4-mapped address on an AF_INET6 socket should produce the same result as binding to an IPv4 address on AF_INET socket. The two are interchangable as v4-mapped address is really a portability aid. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ipv6: Allow ipv4 wildcard binds after ipv6 address bindsVlad Yasevich
The IPv4 wildcard (0.0.0.0) address does not intersect in any way with explicit IPv6 addresses. These two should be permitted, but the IPv4 conflict code checks the ipv6only bit as part of the test. Since binding to an explicit IPv6 address restricts the socket to only that IPv6 address, the side-effect is that the socket behaves as v6-only. By explicitely setting ipv6only in this case, allows the 2 binds to succeed. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ipv6: Disallow binding to v4-mapped address on v6-only socket.Vlad Yasevich
A socket marked v6-only, can not receive or send traffic to v4-mapped addresses. Thus allowing binding to v4-mapped address on such a socket makes no sense. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24netlink: add NETLINK_NO_ENOBUFS socket flagPablo Neira Ayuso
This patch adds the NETLINK_NO_ENOBUFS socket flag. This flag can be used by unicast and broadcast listeners to avoid receiving ENOBUFS errors. Generally speaking, ENOBUFS errors are useful to notify two things to the listener: a) You may increase the receiver buffer size via setsockopt(). b) You have lost messages, you may be out of sync. In some cases, ignoring ENOBUFS errors can be useful. For example: a) nfnetlink_queue: this subsystem does not have any sort of resync method and you can decide to ignore ENOBUFS once you have set a given buffer size. b) ctnetlink: you can use this together with the socket flag NETLINK_BROADCAST_SEND_ERROR to stop getting ENOBUFS errors as you do not need to resync (packets whose event are not delivered are drop to provide reliable logging and state-synchronization). Moreover, the use of NETLINK_NO_ENOBUFS also reduces a "go up, go down" effect in terms of performance which is due to the netlink congestion control when the listener cannot back off. The effect is the following: 1) throughput rate goes up and netlink messages are inserted in the receiver buffer. 2) Then, netlink buffer fills and overruns (set on nlk->state bit 0). 3) While the listener empties the receiver buffer, netlink keeps dropping messages. Thus, throughput goes dramatically down. 4) Then, once the listener has emptied the buffer (nlk->state bit 0 is set off), goto step 1. This effect is easy to trigger with netlink broadcast under heavy load, and it is more noticeable when using a big receiver buffer. You can find some results in [1] that show this problem. [1] http://1984.lsi.us.es/linux/netlink/ This patch also includes the use of sk_drop to account the number of netlink messages drop due to overrun. This value is shown in /proc/net/netlink. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24arp_tables: ifname_compare() can assume 16bit alignmentEric Dumazet
Arches without efficient unaligned access can still perform a loop assuming 16bit alignment in ifname_compare() Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24netfilter: trivial Kconfig spelling fixesJan Engelhardt
Supplements commit 67c0d57930ff9a24c6c34abee1b01f7716a9b0e2. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
2009-03-24netfilter: nf_conntrack: Reduce conntrack count in nf_conntrack_free()Eric Dumazet
We use RCU to defer freeing of conntrack structures. In DOS situation, RCU might accumulate about 10.000 elements per CPU in its internal queues. To get accurate conntrack counts (at the expense of slightly more RAM used), we might consider conntrack counter not taking into account "about to be freed elements, waiting in RCU queues". We thus decrement it in nf_conntrack_free(), not in the RCU callback. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Tested-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-23Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/ucc_geth.c
2009-03-23nefilter: nfnetlink: add nfnetlink_set_err and use it in ctnetlinkPablo Neira Ayuso
This patch adds nfnetlink_set_err() to propagate the error to netlink broadcast listener in case of memory allocation errors in the message building. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-23netfilter: sysctl support of logger choiceEric Leblond
This patchs adds support of modification of the used logger via sysctl. It can be used to change the logger to module that can not use the bind operation (ipt_LOG and ipt_ULOG). For this purpose, it creates a directory /proc/sys/net/netfilter/nf_log which contains a file per-protocol. The content of the file is the name current logger (NONE if not set) and a logger can be setup by simply echoing its name to the file. By echoing "NONE" to a /proc/sys/net/netfilter/nf_log/PROTO file, the logger corresponding to this PROTO is set to NULL. Signed-off-by: Eric Leblond <eric@inl.fr> Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-22tcp: Discard segments that ack data not yet sentJohn Dykstra
Discard incoming packets whose ack field iincludes data not yet sent. This is consistent with RFC 793 Section 3.9. Change tcp_ack() to distinguish between too-small and too-large ack field values. Keep segments with too-large ack fields out of the fast path, and change slow path to discard them. Reported-by: Oliver Zheng <mailinglists+netdev@oliverzheng.com> Signed-off-by: John Dykstra <john.dykstra1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21netdev: expose net_device_ops compat as config optionStephen Hemminger
Now that most network device drivers in (all but one in x86_64 allmodconfig) support net_device_ops. Expose it as a configuration parameter. Still need to address even older 32 bit drivers, and other arch before compatiablity can be scheduled for removal in some future release. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21irlan: convert to net_device_opsStephen Hemminger
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21irda: net_device_ops ioctl fixStephen Hemminger
Need to reference net_device_ops not old pointer. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21atm: convert clip driver to net_device_opsStephen Hemminger
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21atm: convert mpc device to using netdev_opsStephen Hemminger
This converts the mpc device to using new netdevice_ops. Compile tested only, needs more than usual review since device was swaping pointers around etc. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Chas Williams <chas@cmf.nrl.navy.mil> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21dsa: add switch chip cascading supportLennert Buytenhek
The initial version of the DSA driver only supported a single switch chip per network interface, while DSA-capable switch chips can be interconnected to form a tree of switch chips. This patch adds support for multiple switch chips on a network interface. An example topology for a 16-port device with an embedded CPU is as follows: +-----+ +--------+ +--------+ | |eth0 10| switch |9 10| switch | | CPU +----------+ +-------+ | | | | chip 0 | | chip 1 | +-----+ +---++---+ +---++---+ || || || || ||1000baseT ||1000baseT ||ports 1-8 ||ports 9-16 This requires a couple of interdependent changes in the DSA layer: - The dsa platform driver data needs to be extended: there is still only one netdevice per DSA driver instance (eth0 in the example above), but each of the switch chips in the tree needs its own mii_bus device pointer, MII management bus address, and port name array. (include/net/dsa.h) The existing in-tree dsa users need some small changes to deal with this. (arch/arm) - The DSA and Ethertype DSA tagging modules need to be extended to use the DSA device ID field on receive and demultiplex the packet accordingly, and fill in the DSA device ID field on transmit according to which switch chip the packet is heading to. (net/dsa/tag_{dsa,edsa}.c) - The concept of "CPU port", which is the switch chip port that the CPU is connected to (port 10 on switch chip 0 in the example), needs to be extended with the concept of "upstream port", which is the port on the switch chip that will bring us one hop closer to the CPU (port 10 for both switch chips in the example above). - The dsa platform data needs to specify which ports on which switch chips are links to other switch chips, so that we can enable DSA tagging mode on them. (For inter-switch links, we always use non-EtherType DSA tagging, since it has lower overhead. The CPU link uses dsa or edsa tagging depending on what the 'root' switch chip supports.) This is done by specifying "dsa" for the given port in the port array. - The dsa platform data needs to be extended with information on via which port to reach any given switch chip from any given switch chip. This info is specified via the per-switch chip data struct ->rtable[] array, which gives the nexthop ports for each of the other switches in the tree. For the example topology above, the dsa platform data would look something like this: static struct dsa_chip_data sw[2] = { { .mii_bus = &foo, .sw_addr = 1, .port_names[0] = "p1", .port_names[1] = "p2", .port_names[2] = "p3", .port_names[3] = "p4", .port_names[4] = "p5", .port_names[5] = "p6", .port_names[6] = "p7", .port_names[7] = "p8", .port_names[9] = "dsa", .port_names[10] = "cpu", .rtable = (s8 []){ -1, 9, }, }, { .mii_bus = &foo, .sw_addr = 2, .port_names[0] = "p9", .port_names[1] = "p10", .port_names[2] = "p11", .port_names[3] = "p12", .port_names[4] = "p13", .port_names[5] = "p14", .port_names[6] = "p15", .port_names[7] = "p16", .port_names[10] = "dsa", .rtable = (s8 []){ 10, -1, }, }, }, static struct dsa_platform_data pd = { .netdev = &foo, .nr_switches = 2, .sw = sw, }; Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Gary Thomas <gary@mlbassoc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21dsa: add support for the Marvell 88E6095/6095F switch chipsLennert Buytenhek
Add support for the Marvell 88E6095/6095F switch chips. These chips are similar to the 88e6131, so we can add the support to mv88e6131.c easily. Thanks to Gary Thomas <gary@mlbassoc.com> and Jesper Dangaard Brouer <hawk@diku.dk> for testing various patches. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Gary Thomas <gary@mlbassoc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21dsa: set ->iflink on slave interfaces to the ifindex of the parentLennert Buytenhek
..so that we can parse the DSA topology from 'ip link' output: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 4: lan1@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue 5: lan2@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue 6: lan3@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue 7: lan4@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21ipx: use constant for strings and desciptorStephen Hemminger
Fix compiler warning about non-const format string. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21snap: use const for descriptorStephen Hemminger
Protocols should be able to use constant value for the descriptor. Minor whitespace cleanup as well Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21net: remove useless prefetch() callEric Dumazet
There is no gain using prefetch() in dev_hard_start_xmit(), since we already had to read ops->ndo_select_queue pointer in dev_pick_tx(), and both pointers are probably located in the same cache line. This prefetch call slows down fast path because of a stall in address computation. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21sctp: Clean up TEST_FRAME hacks.Vlad Yasevich
Remove 2 TEST_FRAME hacks that are no longer needed. These allowed sctp regression tests to compile before, but are no longer needed. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21skb: expose and constify hash primitivesStephen Hemminger
Some minor changes to queue hashing: 1. Use const on accessor functions 2. Export skb_tx_hash for use in drivers (see ixgbe) Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21atm: lec use dev_change_mtuStephen Hemminger
Rather than calling device pointer directly (which is incorrect with net_device_ops), use the standard dev_change_mtu. Compile tested only. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21net/*: use linux/kernel.h swap()Ilpo Järvinen
tcp_sack_swap seems unnecessary so I pushed swap to the caller. Also removed comment that seemed then pointless, and added include when not already there. Compile tested. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21netrom: zero length frame filtering in NetRomBernard Pidoux
A zero length frame filter was recently introduced in ROSE protocole. Previous commit makes the same at AX25 protocole level. This patch has the same purpose for NetRom protocole. The reason is that empty frames have no meaning in NetRom protocole. Signed-off-by: Bernard Pidoux <f6bvp@amsat.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21ax25: zero length frame filtering in AX25Bernard Pidoux
In previous commit 244f46ae6e9e18f6fc0be7d1f49febde4762c34b was introduced a zero length frame filter for ROSE protocole. This patch has the same purpose at AX25 frame level for the same reason. Empty frames have no meaning in AX25 protocole. Signed-off-by: Bernard Pidoux <f6bvp@amsat.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-21ax25: SOCK_DEBUG message simplificationBernard Pidoux
This patch condenses two debug messages in one. Signed-off-by: Bernard Pidoux <f6bvp@amsat.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-20nl80211: Check that function pointer != NULL before using itJouni Malinen
NL80211_CMD_GET_MESH_PARAMS and NL80211_CMD_SET_MESH_PARAMS handlers did not verify whether a function pointer is NULL (not supported by the driver) before trying to call the function. The former nl80211 command is available for unprivileged users, too, so this can potentially allow normal users to kill networking (or worse..) if mac80211 is built without CONFIG_MAC80211_MESH=y. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-03-20Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/virtio_net.c
2009-03-18netns: oops in ip[6]_frag_reasm incrementing statsJorge Boncompte [DTI2]
dev can be NULL in ip[6]_frag_reasm for skb's coming from RAW sockets. Quagga's OSPFD sends fragmented packets on a RAW socket, when netfilter conntrack reassembles them on the OUTPUT path you hit this code path. You can test it with something like "hping2 -0 -d 2000 -f AA.BB.CC.DD" With help from Jarek Poplawski. Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18net: kfree(napi->skb) => kfree_skbRoel Kluin
struct sk_buff pointers should be freed with kfree_skb. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18net: fix sctp breakageAl Viro
broken by commit 5e739d1752aca4e8f3e794d431503bfca3162df4; AFAICS should be -stable fodder as well... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Aced-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18tipc: fix non-const printf format argumentsStephen Hemminger
Fix warnings from current gcc about using non-const strings as printf args in TIPC. Compile tested only (not a TIPC user). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18ipv6: fix display of local and remote sit endpointsBjørn Mork
This fixes the regressions cause by commit 1326c3d5a4b792a2b15877feb7fb691f8945d203 (v2.6.28-rc6-461-g23a12b1) broke the display of local and remote addresses of an SIT tunnel in iproute2. nt->parms is used by ipip6_tunnel_init() and therefore need to be initialized first. Tracked as http://bugzilla.kernel.org/show_bug.cgi?id=12868 Reported-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18tcp: remove parameter from tcp_recv_urg().Rami Rosen
This patch removes an unused parameter (addr_len) from tcp_recv_urg() method in net/ipv4/tcp.c. Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18ipv6: Fix incorrect disable_ipv6 behaviorBrian Haley
Fix the behavior of allowing both sysctl and addrconf_dad_failure() to set the disable_ipv6 parameter without any bad side-effects. If DAD fails and accept_dad > 1, we will still set disable_ipv6=1, but then instead of allowing an RA to add an address then immediately fail DAD, we simply don't allow the address to be added in the first place. This also lets the user set this flag and disable all IPv6 addresses on the interface, or on the entire system. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-18netfilter: ctnetlink: fix rcu context imbalancePatrick McHardy
Introduced by 7ec47496 (netfilter: ctnetlink: cleanup master conntrack assignation): net/netfilter/nf_conntrack_netlink.c:1275:2: warning: context imbalance in 'ctnetlink_create_conntrack' - different lock contexts for basic block Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-18netfilter: remove nf_ct_l4proto_find_get/nf_ct_l4proto_putFlorian Westphal
users have been moved to __nf_ct_l4proto_find. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-18netfilter: ctnetlink: remove remaining module refcountingFlorian Westphal
Convert the remaining refcount users. As pointed out by Patrick McHardy, the protocols can be accessed safely using RCU. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-03-17Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
2009-03-17Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/igb/igb_main.c drivers/net/qlge/qlge_main.c drivers/net/wireless/ath9k/ath9k.h drivers/net/wireless/ath9k/core.h drivers/net/wireless/ath9k/hw.c
2009-03-17Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2009-03-17Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6
2009-03-17gro: Fix legacy path napi_complete crashHerbert Xu
On the legacy netif_rx path, I incorrectly tried to optimise the napi_complete call by using __napi_complete before we reenable IRQs. This simply doesn't work since we need to flush the held GRO packets first. This patch fixes it by doing the obvious thing of reenabling IRQs first and then calling napi_complete. Reported-by: Frank Blaschka <blaschka@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-17gro: Fix vlan/netpoll check againHerbert Xu
Jarek Poplawski pointed out that my previous fix is broken for VLAN+netpoll as if netpoll is enabled we'd end up in the normal receive path instead of the VLAN receive path. This patch fixes it by calling the VLAN receive hook. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-16cfg80211: add regulatory netlink multicast groupLuis R. Rodriguez
This allows us to send to userspace "regulatory" events. For now we just send an event when we change regulatory domains. We also notify userspace when devices are using their own custom world roaming regulatory domains. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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