Commit graph

676 commits

Author SHA1 Message Date
stephen hemminger
fa2da8cdae bridge: correct IPv6 checksum after pull
Bridge multicast snooping of ICMPv6 would incorrectly report a checksum problem
when used with Ethernet devices like sky2 that use CHECKSUM_COMPLETE.
When bytes are removed from skb, the computed checksum needs to be adjusted.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Tested-by: Martin Volf <martin.volf.42@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-16 17:32:43 -05:00
Andrey Vagin
ef5e0d8237 bridge: Fix potential deadlock on br->multicast_lock
multicast_lock is taken in softirq context, so we should use
spin_lock_bh() in userspace.

call-chain in softirq context:
run_timer_softirq()
	br_multicast_query_expired()

call-chain in userspace:
sysfs_write_file()
	store_multicast_snooping()
		br_multicast_toggle()

Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-14 00:38:53 -05:00
Linus Torvalds
32aaeffbd4 Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
* 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)
  Revert "tracing: Include module.h in define_trace.h"
  irq: don't put module.h into irq.h for tracking irqgen modules.
  bluetooth: macroize two small inlines to avoid module.h
  ip_vs.h: fix implicit use of module_get/module_put from module.h
  nf_conntrack.h: fix up fallout from implicit moduleparam.h presence
  include: replace linux/module.h with "struct module" wherever possible
  include: convert various register fcns to macros to avoid include chaining
  crypto.h: remove unused crypto_tfm_alg_modname() inline
  uwb.h: fix implicit use of asm/page.h for PAGE_SIZE
  pm_runtime.h: explicitly requires notifier.h
  linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h
  miscdevice.h: fix up implicit use of lists and types
  stop_machine.h: fix implicit use of smp.h for smp_processor_id
  of: fix implicit use of errno.h in include/linux/of.h
  of_platform.h: delete needless include <linux/module.h>
  acpi: remove module.h include from platform/aclinux.h
  miscdevice.h: delete unnecessary inclusion of module.h
  device_cgroup.h: delete needless include <linux/module.h>
  net: sch_generic remove redundant use of <linux/module.h>
  net: inet_timewait_sock doesnt need <linux/module.h>
  ...

Fix up trivial conflicts (other header files, and  removal of the ab3550 mfd driver) in
 - drivers/media/dvb/frontends/dibx000_common.c
 - drivers/media/video/{mt9m111.c,ov6650.c}
 - drivers/mfd/ab3550-core.c
 - include/linux/dmaengine.h
2011-11-06 19:44:47 -08:00
Joe Perches
0a9ee81349 netfilter: Remove unnecessary OOM logging messages
Site specific OOM messages are duplications of a generic MM
out of memory message and aren't really useful, so just
delete them.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-11-01 09:19:49 +01:00
Paul Gortmaker
79bb1ee46a net: fix implicit kmod.h usage in bridge/br_stp_if.c
To fix this, once the implicit presence of module.h is removed:

net/bridge/br_stp_if.c: In function ‘br_stp_start’:
net/bridge/br_stp_if.c:131: error: implicit declaration of function ‘call_usermodehelper’
net/bridge/br_stp_if.c:131: error: ‘UMH_WAIT_PROC’ undeclared (first use in this function)

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:30:30 -04:00
Paul Gortmaker
bc3b2d7fb9 net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules
These files are non modular, but need to export symbols using
the macros now living in export.h -- call out the include so
that things won't break when we remove the implicit presence
of module.h from everywhere.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:30:30 -04:00
David S. Miller
1805b2f048 Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2011-10-24 18:18:09 -04:00
stephen hemminger
1ce5cce895 bridge: fix hang on removal of bridge via netlink
Need to cleanup bridge device timers and ports when being bridge
device is being removed via netlink.

This fixes the problem of observed when doing:
 ip link add br0 type bridge
 ip link set dev eth1 master br0
 ip link set br0 up
 ip link del br0

which would cause br0 to hang in unregister_netdev because
of leftover reference count.

Reported-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-18 23:24:16 -04:00
David S. Miller
88c5100c28 Merge branch 'master' of github.com:davem330/net
Conflicts:
	net/batman-adv/soft-interface.c
2011-10-07 13:38:43 -04:00
stephen hemminger
515853ccec bridge: allow forwarding some link local frames
This is based on an earlier patch by Nick Carter with comments
by David Lamparter but with some refinements. Thanks for their patience
this is a confusing area with overlap of standards, user requirements,
and compatibility with earlier releases.

It adds a new sysfs attribute
   /sys/class/net/brX/bridge/group_fwd_mask
that controls forwarding of frames with address of: 01-80-C2-00-00-0X
The default setting has no forwarding to retain compatibility.

One change from earlier releases is that forwarding of group
addresses is not dependent on STP being enabled or disabled. This
choice was made based on interpretation of tie 802.1 standards.
I expect complaints will arise because of this, but better to follow
the standard than continue acting incorrectly by default.

The filtering mask is writeable, but only values that don't forward
known control frames are allowed. It intentionally blocks attempts
to filter control protocols. For example: writing a 8 allows
forwarding 802.1X PAE addresses which is the most common request.

Reported-by: David Lamparter <equinox@diac24.net>
Original-patch-by: Nick Carter <ncarter100@gmail.com>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Tested-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-06 15:27:56 -04:00
stephen hemminger
b64b73d7d0 bridge: leave carrier on for empty bridge
This resolves a regression seen by some users of bridging.
Some users use the bridge like a dummy device.
They expect to be able to put an IPv6 address on the device
with no ports attached. Although there are better ways of doing
this, there is no reason to not allow it.

Note: the bridge still will reflect the state of ports in the
bridge if there are any added.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-06 15:26:50 -04:00
stephen hemminger
64af1bac9b bridge: allow updating existing fdb entries
Need to allow application to update existing fdb entries that already
exist. This makes bridge netlink neighbor API have same flags and
semantics as ip neighbor table.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-03 12:17:33 -04:00
stephen hemminger
77f9859837 bridge: fix ordering of NEWLINK and NEWNEIGH events
When port is added to a bridge, the old code would send the new neighbor
netlink message before the subsequent new link message. This bug makes
it difficult to use the monitoring API in an application.

This code changes the ordering to add the forwarding entry
after the port is setup. One of the error checks (for invalid address)
is moved earlier in the process to avoid having to do unwind.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-03 12:17:33 -04:00
David S. Miller
8decf86879 Merge branch 'master' of github.com:davem330/net
Conflicts:
	MAINTAINERS
	drivers/net/Kconfig
	drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
	drivers/net/ethernet/broadcom/tg3.c
	drivers/net/wireless/iwlwifi/iwl-pci.c
	drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c
	drivers/net/wireless/rt2x00/rt2800usb.c
	drivers/net/wireless/wl12xx/main.c
2011-09-22 03:23:13 -04:00
Jiri Pirko
4bc71cb983 net: consolidate and fix ethtool_ops->get_settings calling
This patch does several things:
- introduces __ethtool_get_settings which is called from ethtool code and
  from drivers as well. Put ASSERT_RTNL there.
- dev_ethtool_get_settings() is replaced by __ethtool_get_settings()
- changes calling in drivers so rtnl locking is respected. In
  iboe_get_rate was previously ->get_settings() called unlocked. This
  fixes it. Also prb_calc_retire_blk_tmo() in af_packet.c had the same
  problem. Also fixed by calling __dev_get_by_index() instead of
  dev_get_by_index() and holding rtnl_lock for both calls.
- introduces rtnl_lock in bnx2fc_vport_create() and fcoe_vport_create()
  so bnx2fc_if_create() and fcoe_if_create() are called locked as they
  are from other places.
- use __ethtool_get_settings() in bonding code

Signed-off-by: Jiri Pirko <jpirko@redhat.com>

v2->v3:
	-removed dev_ethtool_get_settings()
	-added ASSERT_RTNL into __ethtool_get_settings()
	-prb_calc_retire_blk_tmo - use __dev_get_by_index() and lock
	 around it and __ethtool_get_settings() call
v1->v2:
        add missing export_symbol
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com> [except FCoE bits]
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-15 17:32:26 -04:00
Jiri Pirko
fa3df928e0 br: remove redundant check and init
Since these checks and initialization are done in
dev_ethtool_get_settings called later on, remove this redundancy.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-15 15:36:34 -04:00
David S. Miller
7858241655 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6 2011-08-30 17:43:56 -04:00
Eric Dumazet
22df13319d bridge: fix a possible use after free
br_multicast_ipv6_rcv() can call pskb_trim_rcsum() and therefore skb
head can be reallocated.

Cache icmp6_type field instead of dereferencing twice the struct
icmp6hdr pointer.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-24 17:49:24 -07:00
Yan, Zheng
4b275d7efa bridge: Pseudo-header required for the checksum of ICMPv6
Checksum of ICMPv6 is not properly computed because the pseudo header is not used.
Thus, the MLD packet gets dropped by the bridge.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Reported-by: Ang Way Chuang <wcang@sfc.wide.ad.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-24 17:49:00 -07:00
Eric Dumazet
11f3a6bdc2 bridge: fix a possible net_device leak
Jan Beulich reported a possible net_device leak in bridge code after
commit bb900b27a2 (bridge: allow creating bridge devices with netlink)

Reported-by: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-22 16:49:56 -07:00
David S. Miller
823dcd2506 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net 2011-08-20 10:39:12 -07:00
Jiri Pirko
afc4b13df1 net: remove use of ndo_set_multicast_list in drivers
replace it by ndo_set_rx_mode

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-17 20:22:03 -07:00
Julia Lawall
5189054dd7 net/bridge/netfilter/ebtables.c: use available error handling code
Free the locally allocated table and newinfo as done in adjacent error
handling code.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-11 05:52:57 -07:00
Andrei Warkentin
9be6dd6510 Bridge: Always send NETDEV_CHANGEADDR up on br MAC change.
This ensures the neighbor entries associated with the bridge
dev are flushed, also invalidating the associated cached L2 headers.

This means we br_add_if/br_del_if ports to implement hand-over and
not wind up with bridge packets going out with stale MAC.

This means we can also change MAC of port device and also not wind
up with bridge packets going out with stale MAC.

This builds on Stephen Hemminger's patch, also handling the br_del_if
case and the port MAC change case.

Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-09 21:44:44 -07:00
Stephen Hemminger
a9b3cd7f32 rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER
When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-02 04:29:23 -07:00
Bart De Schuymer
9823d9ff48 netfilter: ebtables: fix ebtables build dependency
The configuration of ebtables shouldn't depend on
CONFIG_BRIDGE_NETFILTER, only on CONFIG_NETFILTER.

Reported-by: Sébastien Laveze <slaveze@gmail.com>
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-07-29 16:40:30 +02:00
Arun Sharma
60063497a9 atomic: use <linux/atomic.h>
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Linus Torvalds
d3ec4844d4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
  fs: Merge split strings
  treewide: fix potentially dangerous trailing ';' in #defined values/expressions
  uwb: Fix misspelling of neighbourhood in comment
  net, netfilter: Remove redundant goto in ebt_ulog_packet
  trivial: don't touch files that are removed in the staging tree
  lib/vsprintf: replace link to Draft by final RFC number
  doc: Kconfig: `to be' -> `be'
  doc: Kconfig: Typo: square -> squared
  doc: Konfig: Documentation/power/{pm => apm-acpi}.txt
  drivers/net: static should be at beginning of declaration
  drivers/media: static should be at beginning of declaration
  drivers/i2c: static should be at beginning of declaration
  XTENSA: static should be at beginning of declaration
  SH: static should be at beginning of declaration
  MIPS: static should be at beginning of declaration
  ARM: static should be at beginning of declaration
  rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
  Update my e-mail address
  PCIe ASPM: forcedly -> forcibly
  gma500: push through device driver tree
  ...

Fix up trivial conflicts:
 - arch/arm/mach-ep93xx/dma-m2p.c (deleted)
 - drivers/gpio/gpio-ep93xx.c (renamed and context nearby)
 - drivers/net/r8169.c (just context changes)
2011-07-25 13:56:39 -07:00
stephen hemminger
160d73b845 bridge: minor cleanups
Some minor cleanups that won't impact code:
  1. Remove inline from non-critical functions; compiler will most
     likely inline them anyway.
  2. Make function args const where possible.
  3. Whitespace cleanup

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:13 -07:00
stephen hemminger
4ecb961c8b bridge: add notification over netlink when STP changes state
When STP changes state of interface need to send a new link
message to reflect that change.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:12 -07:00
stephen hemminger
56139fc5bd bridge: notifier called with the wrong device
If a new device is added to a bridge, the ethernet address of the
bridge network device may change. When the address changes, the
appropriate callback is called, but with the wrong device argument.
The address of the bridge device (ie br0) changes not the address
of the device being passed to add_if (ie eth0).

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:12 -07:00
stephen hemminger
0652cac22c bridge: ignore bogus STP config packets
If the message_age is already greater than the max_age, then the
BPDU is bogus. Linux won't generate BPDU, but conformance tester
or buggy implementation might.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:12 -07:00
stephen hemminger
0c03150e7e bridge: send proper message_age in config BPDU
A bridge topology with three systems:

      +------+  +------+
      | A(2) |--| B(1) |
      +------+  +------+
           \    /
          +------+
          | C(3) |
          +------+

What is supposed to happen:
 * bridge with the lowest ID is elected root (for example: B)
 * C detects that A->C is higher cost path and puts in blocking state

What happens. Bridge with lowest id (B) is elected correctly as
root and things start out fine initially. But then config BPDU
doesn't get transmitted from A -> C. Because of that
the link from A-C is transistioned to the forwarding state.

The root cause of this is that the configuration messages
is generated with bogus message age, and dropped before
sending.

In the standardmessage_age is supposed to be:
  the time since the generation of the Configuration BPDU by
  the Root that instigated the generation of this Configuration BPDU.

Reimplement this by recording the timestamp (age + jiffies) when
recording config information. The old code incorrectly used the time
elapsed on the ageing timer which was incorrect.

See also:
  https://bugzilla.vyatta.com/show_bug.cgi?id=7164

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:12 -07:00
Jesper Juhl
f0da7ee410 net, netfilter: Remove redundant goto in ebt_ulog_packet
In net/bridge/netfilter/ebt_ulog.c:ebt_ulog_packet() the 'goto unlock'
before the 'alloc_failure' label is completely redundant. This patch
removes it.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-07-21 14:02:17 +02:00
David S. Miller
d3aaeb38c4 net: Add ->neigh_lookup() operation to dst_ops
In the future dst entries will be neigh-less.  In that environment we
need to have an easy transition point for current users of
dst->neighbour outside of the packet output fast path.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-18 00:40:17 -07:00
David S. Miller
69cce1d140 net: Abstract dst->neighbour accesses behind helpers.
dst_{get,set}_neighbour()

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-17 23:11:35 -07:00
David S. Miller
8f40b161de neigh: Pass neighbour entry to output ops.
This will get us closer to being able to do "neigh stuff"
completely independent of the underlying dst_entry for
protocols (ipv4/ipv6) that wish to do so.

We will also be able to make dst entries neigh-less.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-17 23:11:17 -07:00
David S. Miller
f6b72b6217 net: Embed hh_cache inside of struct neighbour.
Now that there is a one-to-one correspondance between neighbour
and hh_cache entries, we no longer need:

1) dynamic allocation
2) attachment to dst->hh
3) refcounting

Initialization of the hh_cache entry is indicated by hh_len
being non-zero, and such initialization is always done with
the neighbour's lock held as a writer.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-14 07:53:20 -07:00
David S. Miller
e12fe68ce3 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-05 23:23:37 -07:00
Herbert Xu
44661462ee bridge: Always flood broadcast packets
As is_multicast_ether_addr returns true on broadcast packets as
well, we need to explicitly exclude broadcast packets so that
they're always flooded.  This wasn't an issue before as broadcast
packets were considered to be an unregistered multicast group,
which were always flooded.  However, as we now only flood such
packets to router ports, this is no longer acceptable.

Reported-by: Michael Guntsche <mike@it-loops.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-05 18:39:39 -07:00
Herbert Xu
bd4265fe36 bridge: Only flood unregistered groups to routers
The bridge currently floods packets to groups that we have never
seen before to all ports.  This is not required by RFC4541 and
in fact it is not desirable in environment where traffic to
unregistered group is always present.

This patch changes the behaviour so that we only send traffic
to unregistered groups to ports marked as routers.

The user can always force flooding behaviour to any given port
by marking it as a router.

Note that this change does not apply to traffic to 224.0.0.X
as traffic to those groups must always be flooded to all ports.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-24 17:52:51 -07:00
David S. Miller
9f6ec8d697 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
	drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
	drivers/net/wireless/rtlwifi/pci.c
	net/netfilter/ipvs/ip_vs_core.c
2011-06-20 22:29:08 -07:00
WANG Cong
cefa9993f1 netpoll: copy dev name of slaves to struct netpoll
Otherwise we will not see the name of the slave dev in error
message:

[  388.469446] (null):  doesn't support polling, aborting.

Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-19 16:13:01 -07:00
Fernando Luis Vázquez Cao
fc2af6c73f IGMP snooping: set mrouters_only flag for IPv6 traffic properly
Upon reception of a MGM report packet the kernel sets the mrouters_only flag
in a skb that is a clone of the original skb, which means that the bridge
loses track of MGM packets (cb buffers are tied to a specific skb and not
shared) and it ends up forwading join requests to the bridge interface.

This can cause unexpected membership timeouts and intermitent/permanent loss
of connectivity as described in RFC 4541 [2.1.1. IGMP Forwarding Rules]:

    A snooping switch should forward IGMP Membership Reports only to
    those ports where multicast routers are attached.
    [...]
    Sending membership reports to other hosts can result, for IGMPv1
    and IGMPv2, in unintentionally preventing a host from joining a
    specific multicast group.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>
2011-06-16 23:14:13 -04:00
Fernando Luis Vázquez Cao
62b2bcb49c IGMP snooping: set mrouters_only flag for IPv4 traffic properly
Upon reception of a IGMP/IGMPv2 membership report the kernel sets the
mrouters_only flag in a skb that may be a clone of the original skb, which
means that sometimes the bridge loses track of membership report packets (cb
buffers are tied to a specific skb and not shared) and it ends up forwading
join requests to the bridge interface.

This can cause unexpected membership timeouts and intermitent/permanent loss
of connectivity as described in RFC 4541 [2.1.1. IGMP Forwarding Rules]:

    A snooping switch should forward IGMP Membership Reports only to
    those ports where multicast routers are attached.
    [...]
    Sending membership reports to other hosts can result, for IGMPv1
    and IGMPv2, in unintentionally preventing a host from joining a
    specific multicast group.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Tested-by: Hayato Kakuta <kakuta.hayato@oss.ntt.co.jp>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>
2011-06-16 23:14:12 -04:00
Greg Rose
c7ac8679be rtnetlink: Compute and store minimum ifinfo dump size
The message size allocated for rtnl ifinfo dumps was limited to
a single page.  This is not enough for additional interface info
available with devices that support SR-IOV and caused a bug in
which VF info would not be displayed if more than approximately
40 VFs were created per interface.

Implement a new function pointer for the rtnl_register service that will
calculate the amount of data required for the ifinfo dump and allocate
enough data to satisfy the request.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-06-09 20:38:07 -07:00
Alexander Holler
6407d74c51 bridge: provide a cow_metrics method for fake_ops
Like in commit 0972ddb237 (provide cow_metrics() methods to blackhole
dst_ops), we must provide a cow_metrics for bridges fake_dst_ops as
well.

This fixes a regression coming from commits 62fa8a846d (net: Implement
read-only protection and COW'ing of metrics.) and 33eb9873a2 (bridge:
initialize fake_rtable metrics)

ip link set mybridge mtu 1234
-->
[  136.546243] Pid: 8415, comm: ip Tainted: P 
2.6.39.1-00006-g40545b7 #103 ASUSTeK Computer Inc.         V1Sn 
        /V1Sn
[  136.546256] EIP: 0060:[<00000000>] EFLAGS: 00010202 CPU: 0
[  136.546268] EIP is at 0x0
[  136.546273] EAX: f14a389c EBX: 000005d4 ECX: f80d32c0 EDX: f80d1da1
[  136.546279] ESI: f14a3000 EDI: f255bf10 EBP: f15c3b54 ESP: f15c3b48
[  136.546285]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[  136.546293] Process ip (pid: 8415, ti=f15c2000 task=f4741f80 
task.ti=f15c2000)
[  136.546297] Stack:
[  136.546301]  f80c658f f14a3000 ffffffed f15c3b64 c12cb9c8 f80d1b80 
ffffffa1 f15c3bbc
[  136.546315]  c12da347 c12d9c7d 00000000 f7670b00 00000000 f80d1b80 
ffffffa6 f15c3be4
[  136.546329]  00000004 f14a3000 f255bf20 00000008 f15c3bbc c11d6cae 
00000000 00000000
[  136.546343] Call Trace:
[  136.546359]  [<f80c658f>] ? br_change_mtu+0x5f/0x80 [bridge]
[  136.546372]  [<c12cb9c8>] dev_set_mtu+0x38/0x80
[  136.546381]  [<c12da347>] do_setlink+0x1a7/0x860
[  136.546390]  [<c12d9c7d>] ? rtnl_fill_ifinfo+0x9bd/0xc70
[  136.546400]  [<c11d6cae>] ? nla_parse+0x6e/0xb0
[  136.546409]  [<c12db931>] rtnl_newlink+0x361/0x510
[  136.546420]  [<c1023240>] ? vmalloc_sync_all+0x100/0x100
[  136.546429]  [<c1362762>] ? error_code+0x5a/0x60
[  136.546438]  [<c12db5d0>] ? rtnl_configure_link+0x80/0x80
[  136.546446]  [<c12db27a>] rtnetlink_rcv_msg+0xfa/0x210
[  136.546454]  [<c12db180>] ? __rtnl_unlock+0x20/0x20
[  136.546463]  [<c12ee0fe>] netlink_rcv_skb+0x8e/0xb0
[  136.546471]  [<c12daf1c>] rtnetlink_rcv+0x1c/0x30
[  136.546479]  [<c12edafa>] netlink_unicast+0x23a/0x280
[  136.546487]  [<c12ede6b>] netlink_sendmsg+0x26b/0x2f0
[  136.546497]  [<c12bb828>] sock_sendmsg+0xc8/0x100
[  136.546508]  [<c10adf61>] ? __alloc_pages_nodemask+0xe1/0x750
[  136.546517]  [<c11d0602>] ? _copy_from_user+0x42/0x60
[  136.546525]  [<c12c5e4c>] ? verify_iovec+0x4c/0xc0
[  136.546534]  [<c12bd805>] sys_sendmsg+0x1c5/0x200
[  136.546542]  [<c10c2150>] ? __do_fault+0x310/0x410
[  136.546549]  [<c10c2c46>] ? do_wp_page+0x1d6/0x6b0
[  136.546557]  [<c10c47d1>] ? handle_pte_fault+0xe1/0x720
[  136.546565]  [<c12bd1af>] ? sys_getsockname+0x7f/0x90
[  136.546574]  [<c10c4ec1>] ? handle_mm_fault+0xb1/0x180
[  136.546582]  [<c1023240>] ? vmalloc_sync_all+0x100/0x100
[  136.546589]  [<c10233b3>] ? do_page_fault+0x173/0x3d0
[  136.546596]  [<c12bd87b>] ? sys_recvmsg+0x3b/0x60
[  136.546605]  [<c12bdd83>] sys_socketcall+0x293/0x2d0
[  136.546614]  [<c13629d0>] sysenter_do_call+0x12/0x26
[  136.546619] Code:  Bad EIP value.
[  136.546627] EIP: [<00000000>] 0x0 SS:ESP 0068:f15c3b48
[  136.546645] CR2: 0000000000000000
[  136.546652] ---[ end trace 6909b560e78934fa ]---

Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-07 00:51:35 -07:00
David S. Miller
58bf2dbccc Merge branch 'pablo/nf-2.6-updates' of git://1984.lsi.us.es/net-2.6 2011-05-27 13:04:40 -04:00
David Miller
97242c85a2 netfilter: Fix several warnings in compat_mtw_from_user().
Kill set but not used 'entry_offset'.

Add a default case to the switch statement so the compiler
can see that we always initialize off and size_kern before
using them.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-05-26 19:09:07 +02:00
Eric Dumazet
33eb9873a2 bridge: initialize fake_rtable metrics
bridge netfilter code uses a fake_rtable, and we must init its _metric
field or risk NULL dereference later.

Ref: https://bugzilla.kernel.org/show_bug.cgi?id=35672

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-24 13:32:18 -04:00