Commit Graph

1099 Commits

Author SHA1 Message Date
Florian Westphal 71e168b151 net: bridge: add compile-time assert for cb struct size
make build fail if structure no longer fits into ->cb storage.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-03 14:07:04 -05:00
Geert Uytterhoeven 9672723973 bridge: netfilter: Move sysctl-specific error code inside #ifdef
If CONFIG_SYSCTL=n:

    net/bridge/br_netfilter.c: In function ‘br_netfilter_init’:
    net/bridge/br_netfilter.c:996: warning: label ‘err1’ defined but not used

Move the label and the code after it inside the existing #ifdef to get
rid of the warning.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-12 08:44:46 -08:00
David S. Miller 2573beec56 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-09 14:35:57 -08:00
Toshiaki Makita 25d3b493a5 bridge: Fix inability to add non-vlan fdb entry
Bridge's default_pvid adds a vid by default, by which we cannot add a
non-vlan fdb entry by default, because br_fdb_add() adds fdb entries for
all vlans instead of a non-vlan one when any vlan is configured.

 # ip link add br0 type bridge
 # ip link set eth0 master br0
 # bridge fdb add 12:34:56:78:90:ab dev eth0 master temp
 # bridge fdb show brport eth0 | grep 12:34:56:78:90:ab
 12:34:56:78:90:ab dev eth0 vlan 1 static

We expect a non-vlan fdb entry as well as vlan 1:
 12:34:56:78:90:ab dev eth0 static

To fix this, we need to insert a non-vlan fdb entry if vlan is not
specified, even when any vlan is configured.

Fixes: 5be5a2df40 ("bridge: Add filtering support for default_pvid")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-09 14:19:04 -08:00
Roopa Prabhu 1fd0bddb61 bridge: add missing bridge port check for offloads
This patch fixes a missing bridge port check caught by smatch.

setlink/dellink of attributes like vlans can come for a bridge device
and there is no need to offload those today. So, this patch adds a bridge
port check. (In these cases however, the BRIDGE_SELF flags will always be set
and we may not hit a problem with the current code).

smatch complaint:

The patch 68e331c785b8: "bridge: offload bridge port attributes to
switch asic if feature flag set" from Jan 29, 2015, leads to the
following Smatch complaint:

net/bridge/br_netlink.c:552 br_setlink()
	 error: we previously assumed 'p' could be null (see line 518)

net/bridge/br_netlink.c
   517
   518		if (p && protinfo) {
                    ^
Check for NULL.

Reported-By: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-07 22:49:47 -08:00
David S. Miller 6e03f896b5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/vxlan.c
	drivers/vhost/net.c
	include/linux/if_vlan.h
	net/core/dev.c

The net/core/dev.c conflict was the overlap of one commit marking an
existing function static whilst another was adding a new function.

In the include/linux/if_vlan.h case, the type used for a local
variable was changed in 'net', whereas the function got rewritten
to fix a stacked vlan bug in 'net-next'.

In drivers/vhost/net.c, Al Viro's iov_iter conversions in 'net-next'
overlapped with an endainness fix for VHOST 1.0 in 'net'.

In drivers/net/vxlan.c, vxlan_find_vni() added a 'flags' parameter
in 'net-next' whereas in 'net' there was a bug fix to pass in the
correct network namespace pointer in calls to this function.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-05 14:33:28 -08:00
David S. Miller 3fcf901118 Revert "bridge: Let bridge not age 'externally' learnt FDB entries, they are removed when 'external' entity notifies the aging"
This reverts commit 9a05dde59a.

Requested by Scott Feldman.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-04 23:52:44 -08:00
Siva Mannem 9a05dde59a bridge: Let bridge not age 'externally' learnt FDB entries, they are removed when 'external' entity notifies the aging
When 'learned_sync' flag is turned on, the offloaded switch
 port syncs learned MAC addresses to bridge's FDB via switchdev notifier
 (NETDEV_SWITCH_FDB_ADD). Currently, FDB entries learnt via this mechanism are
 wrongly being deleted by bridge aging logic. This patch ensures that FDB
 entries synced from offloaded switch ports are not deleted by bridging logic.
 Such entries can only be deleted via switchdev notifier
 (NETDEV_SWITCH_FDB_DEL).

Signed-off-by: Siva Mannem <siva.mannem.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-04 13:51:10 -08:00
Roopa Prabhu 68e331c785 bridge: offload bridge port attributes to switch asic if feature flag set
This patch adds support to set/del bridge port attributes in hardware from
the bridge driver.

With this, when the user sends a bridge setlink message with no flags or
master flags set,
   - the bridge driver ndo_bridge_setlink handler sets settings in the kernel
   - calls the swicthdev api to propagate the attrs to the switchdev
	hardware

   You can still use the self flag to go to the switch hw or switch port
   driver directly.

With this, it also makes sure a notification goes out only after the
attributes are set both in the kernel and hw.

The patch calls switchdev api only if BRIDGE_FLAGS_SELF is not set.
This is because the offload cases with BRIDGE_FLAGS_SELF are handled in
the caller (in rtnetlink.c).

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-01 23:16:34 -08:00
Roopa Prabhu add511b382 bridge: add flags argument to ndo_bridge_setlink and ndo_bridge_dellink
bridge flags are needed inside ndo_bridge_setlink/dellink handlers to
avoid another call to parse IFLA_AF_SPEC inside these handlers

This is used later in this series

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-01 23:16:33 -08:00
Daniel Borkmann 207895fd38 net: mark some potential candidates __read_mostly
They are all either written once or extremly rarely (e.g. from init
code), so we can move them to the .data..read_mostly section.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-30 17:58:39 -08:00
Dan Carpenter 1b846f9282 bridge: simplify br_getlink() a bit
Static checkers complain that we should maybe set "ret" before we do the
"goto out;".  They interpret the NULL return from br_port_get_rtnl() as
a failure and forgetting to set the error code is a common bug in this
situation.

The code is confusing but it's actually correct.  We are returning zero
deliberately.  Let's re-write it a bit to be more clear.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-25 23:32:49 -08:00
Florian Fainelli 8db0a2ee2c net: bridge: reject DSA-enabled master netdevices as bridge members
DSA-enabled master network devices with a switch tagging protocol should
strip the protocol specific format before handing the frame over to
higher layer.

When adding such a DSA master network device as a bridge member, we go
through the following code path when receiving a frame:

__netif_receive_skb_core
	-> first ptype check against ptype_all is not returning any
	   handler for this skb

	-> check and invoke rx_handler:
		-> deliver frame to the bridge layer: br_handle_frame

DSA registers a ptype handler with the fake ETH_XDSA ethertype, which is
called *after* the bridge-layer rx_handler has run. br_handle_frame()
tries to parse the frame it received from the DSA master network device,
and will not be able to match any of its conditions and jumps straight
at the end of the end of br_handle_frame() and returns
RX_HANDLER_CONSUMED there.

Since we returned RX_HANDLER_CONSUMED, __netif_receive_skb_core() stops
RX processing for this frame and returns NET_RX_SUCCESS, so we never get
a chance to call our switch tag packet processing logic and deliver
frames to the DSA slave network devices, and so we do not get any
functional bridge members at all.

Instead of cluttering the bridge receive path with DSA-specific checks,
and rely on assumptions about how __netif_receive_skb_core() is
processing frames, we simply deny adding the DSA master network device
(conduit interface) as a bridge member, leaving only the slave DSA
network devices to be bridge members, since those will work correctly in
all circumstances.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-19 15:45:10 -05:00
Pablo Neira Ayuso 75e8d06d43 netfilter: nf_tables: validate hooks in NAT expressions
The user can crash the kernel if it uses any of the existing NAT
expressions from the wrong hook, so add some code to validate this
when loading the rule.

This patch introduces nft_chain_validate_hooks() which is based on
an existing function in the bridge version of the reject expression.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-01-19 14:52:39 +01:00
Johannes Berg 053c095a82 netlink: make nlmsg_end() and genlmsg_end() void
Contrary to common expectations for an "int" return, these functions
return only a positive value -- if used correctly they cannot even
return 0 because the message header will necessarily be in the skb.

This makes the very common pattern of

  if (genlmsg_end(...) < 0) { ... }

be a whole bunch of dead code. Many places also simply do

  return nlmsg_end(...);

and the caller is expected to deal with it.

This also commonly (at least for me) causes errors, because it is very
common to write

  if (my_function(...))
    /* error condition */

and if my_function() does "return nlmsg_end()" this is of course wrong.

Additionally, there's not a single place in the kernel that actually
needs the message length returned, and if anyone needs it later then
it'll be very easy to just use skb->len there.

Remove this, and make the functions void. This removes a bunch of dead
code as described above. The patch adds lines because I did

-	return nlmsg_end(...);
+	nlmsg_end(...);
+	return 0;

I could have preserved all the function's return values by returning
skb->len, but instead I've audited all the places calling the affected
functions and found that none cared. A few places actually compared
the return value with <= 0 in dump functionality, but that could just
be changed to < 0 with no change in behaviour, so I opted for the more
efficient version.

One instance of the error I've made numerous times now is also present
in net/phonet/pn_netlink.c in the route_dumpit() function - it didn't
check for <0 or <=0 and thus broke out of the loop every single time.
I've preserved this since it will (I think) have caused the messages to
userspace to be formatted differently with just a single message for
every SKB returned to userspace. It's possible that this isn't needed
for the tools that actually use this, but I don't even know what they
are so couldn't test that changing this behaviour would be acceptable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-18 01:03:45 -05:00
Jiri Pirko 3aeb66176f net: replace br_fdb_external_learn_* calls with switchdev notifier events
This patch benefits from newly introduced switchdev notifier and uses it
to propagate fdb learn events from rocker driver to bridge. That avoids
direct function calls and possible use by other listeners (ovs).

Suggested-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-18 00:23:57 -05:00
Roopa Prabhu 02dba4388d bridge: fix setlink/dellink notifications
problems with bridge getlink/setlink notifications today:
        - bridge setlink generates two notifications to userspace
                - one from the bridge driver
                - one from rtnetlink.c (rtnl_bridge_notify)
        - dellink generates one notification from rtnetlink.c. Which
	means bridge setlink and dellink notifications are not
	consistent

        - Looking at the code it appears,
	If both BRIDGE_FLAGS_MASTER and BRIDGE_FLAGS_SELF were set,
        the size calculation in rtnl_bridge_notify can be wrong.
        Example: if you set both BRIDGE_FLAGS_MASTER and BRIDGE_FLAGS_SELF
        in a setlink request to rocker dev, rtnl_bridge_notify will
	allocate skb for one set of bridge attributes, but,
	both the bridge driver and rocker dev will try to add
	attributes resulting in twice the number of attributes
	being added to the skb.  (rocker dev calls ndo_dflt_bridge_getlink)

There are multiple options:
1) Generate one notification including all attributes from master and self:
   But, I don't think it will work, because both master and self may use
   the same attributes/policy. Cannot pack the same set of attributes in a
   single notification from both master and slave (duplicate attributes).

2) Generate one notification from master and the other notification from
   self (This seems to be ideal):
     For master: the master driver will send notification (bridge in this
	example)
     For self: the self driver will send notification (rocker in the above
	example. It can use helpers from rtnetlink.c to do so. Like the
	ndo_dflt_bridge_getlink api).

This patch implements 2) (leaving the 'rtnl_bridge_notify' around to be used
with 'self').

v1->v2 :
	- rtnl_bridge_notify is now called only for self,
	so, remove 'BRIDGE_FLAGS_SELF' check and cleanup a few things
	- rtnl_bridge_dellink used to always send a RTM_NEWLINK msg
	earlier. So, I have changed the notification from br_dellink to
	go as RTM_NEWLINK

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-17 23:49:51 -05:00
Nicolas Dichtel 12d872511c bridge: use MDBA_SET_ENTRY_MAX for maxtype in nlmsg_parse()
This is just a cleanup, because in the current code MDBA_SET_ENTRY_MAX ==
MDBA_SET_ENTRY.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-15 19:37:20 -05:00
David S. Miller 3f3558bb51 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/xen-netfront.c

Minor overlapping changes in xen-netfront.c, mostly to do
with some buffer management changes alongside the split
of stats into TX and RX.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-15 00:53:17 -05:00
Arnd Bergmann d92cfdbbea bridge: only provide proxy ARP when CONFIG_INET is enabled
When IPV4 support is disabled, we cannot call arp_send from
the bridge code, which would result in a kernel link error:

net/built-in.o: In function `br_handle_frame_finish':
:(.text+0x59914): undefined reference to `arp_send'
:(.text+0x59a50): undefined reference to `arp_tbl'

This makes the newly added proxy ARP support in the bridge
code depend on the CONFIG_INET symbol and lets the compiler
optimize the code out to avoid the link error.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 958501163d ("bridge: Add support for IEEE 802.11 Proxy ARP")
Cc: Kyeyoon Park <kyeyoonp@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14 15:08:02 -05:00
Jiri Pirko df8a39defa net: rename vlan_tx_* helpers since "tx" is misleading there
The same macros are used for rx as well. So rename it.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13 17:51:08 -05:00
Roopa Prabhu 0fe6de4903 bridge: fix uninitialized variable warning
net/bridge/br_netlink.c: In function ‘br_fill_ifinfo’:
net/bridge/br_netlink.c:146:32: warning: ‘vid_range_flags’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  err = br_fill_ifvlaninfo_range(skb, vid_range_start,
                                ^
net/bridge/br_netlink.c:108:6: note: ‘vid_range_flags’ was declared here
  u16 vid_range_flags;

Reported-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13 16:39:36 -05:00
Roopa Prabhu 36cd0ffbab bridge: new function to pack vlans into ranges during gets
This patch adds new function to pack vlans into ranges
whereever applicable using the flags BRIDGE_VLAN_INFO_RANGE_BEGIN
and BRIDGE VLAN_INFO_RANGE_END

Old vlan packing code is moved to a new function and continues to be
called when filter_mask is RTEXT_FILTER_BRVLAN.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-12 16:47:05 -05:00
Roopa Prabhu bdced7ef78 bridge: support for multiple vlans and vlan ranges in setlink and dellink requests
This patch changes bridge IFLA_AF_SPEC netlink attribute parser to
look for more than one IFLA_BRIDGE_VLAN_INFO attribute. This allows
userspace to pack more than one vlan in the setlink msg.

The dumps were already sending more than one vlan info in the getlink msg.

This patch also adds bridge_vlan_info flags BRIDGE_VLAN_INFO_RANGE_BEGIN and
BRIDGE_VLAN_INFO_RANGE_END to indicate start and end of vlan range

This patch also deletes unused ifla_br_policy.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-12 16:47:04 -05:00
Toshiaki Makita f902e8812e bridge: Add ability to enable TSO
Currently a bridge device turns off TSO feature if no bridge ports
support it. We can always enable it, since packets can be segmented on
ports by software as well as on the bridge device.
This will reduce the number of packets processed in the bridge.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-12 16:18:09 -05:00
Hubert Sokolowski 6cb69742da net: Do not call ndo_dflt_fdb_dump if ndo_fdb_dump is defined
Add checking whether the call to ndo_dflt_fdb_dump is needed.
It is not expected to call ndo_dflt_fdb_dump unconditionally
by some drivers (i.e. qlcnic or macvlan) that defines
own ndo_fdb_dump. Other drivers define own ndo_fdb_dump
and don't want ndo_dflt_fdb_dump to be called at all.
At the same time it is desirable to call the default dump
function on a bridge device.
Fix attributes that are passed to dev->netdev_ops->ndo_fdb_dump.
Add extra checking in br_fdb_dump to avoid duplicate entries
as now filter_dev can be NULL.

Following tests for filtering have been performed before
the change and after the patch was applied to make sure
they are the same and it doesn't break the filtering algorithm.

[root@localhost ~]# cd /root/iproute2-3.18.0/bridge
[root@localhost bridge]# modprobe dummy
[root@localhost bridge]# ./bridge fdb add f1:f2:f3:f4:f5:f6 dev dummy0
[root@localhost bridge]# brctl addbr br0
[root@localhost bridge]# brctl addif  br0 dummy0
[root@localhost bridge]# ip link set dev br0 address 02:00:00:12:01:04
[root@localhost bridge]# # show all
[root@localhost bridge]# ./bridge fdb show
33:33:00:00:00:01 dev p2p1 self permanent
01:00:5e:00:00:01 dev p2p1 self permanent
33:33:ff:ac:ce:32 dev p2p1 self permanent
33:33:00:00:02:02 dev p2p1 self permanent
01:00:5e:00:00:fb dev p2p1 self permanent
33:33:00:00:00:01 dev p7p1 self permanent
01:00:5e:00:00:01 dev p7p1 self permanent
33:33:ff:79:50:53 dev p7p1 self permanent
33:33:00:00:02:02 dev p7p1 self permanent
01:00:5e:00:00:fb dev p7p1 self permanent
f2:46:50:85:6d:d9 dev dummy0 master br0 permanent
f2:46:50:85:6d:d9 dev dummy0 vlan 1 master br0 permanent
33:33:00:00:00:01 dev dummy0 self permanent
f1:f2:f3:f4:f5:f6 dev dummy0 self permanent
33:33:00:00:00:01 dev br0 self permanent
02:00:00:12:01:04 dev br0 vlan 1 master br0 permanent
02:00:00:12:01:04 dev br0 master br0 permanent
[root@localhost bridge]# # filter by bridge
[root@localhost bridge]# ./bridge fdb show br br0
f2:46:50:85:6d:d9 dev dummy0 master br0 permanent
f2:46:50:85:6d:d9 dev dummy0 vlan 1 master br0 permanent
33:33:00:00:00:01 dev dummy0 self permanent
f1:f2:f3:f4:f5:f6 dev dummy0 self permanent
33:33:00:00:00:01 dev br0 self permanent
02:00:00:12:01:04 dev br0 vlan 1 master br0 permanent
02:00:00:12:01:04 dev br0 master br0 permanent
[root@localhost bridge]# # filter by port
[root@localhost bridge]# ./bridge fdb show brport dummy0
f2:46:50:85:6d:d9 master br0 permanent
f2:46:50:85:6d:d9 vlan 1 master br0 permanent
33:33:00:00:00:01 self permanent
f1:f2:f3:f4:f5:f6 self permanent
[root@localhost bridge]# # filter by port + bridge
[root@localhost bridge]# ./bridge fdb show br br0 brport dummy0
f2:46:50:85:6d:d9 master br0 permanent
f2:46:50:85:6d:d9 vlan 1 master br0 permanent
33:33:00:00:00:01 self permanent
f1:f2:f3:f4:f5:f6 self permanent
[root@localhost bridge]#

Signed-off-by: Hubert Sokolowski <hubert.sokolowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-05 22:52:06 -05:00
David S. Miller 244ebd9f8f Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following batch contains netfilter updates for net-next. Basically,
enhancements for xt_recent, skip zeroing of timer in conntrack, fix
linking problem with recent redirect support for nf_tables, ipset
updates and a couple of cleanups. More specifically, they are:

1) Rise maximum number per IP address to be remembered in xt_recent
   while retaining backward compatibility, from Florian Westphal.

2) Skip zeroing timer area in nf_conn objects, also from Florian.

3) Inspect IPv4 and IPv6 traffic from the bridge to allow filtering using
   using meta l4proto and transport layer header, from Alvaro Neira.

4) Fix linking problems in the new redirect support when CONFIG_IPV6=n
   and IP6_NF_IPTABLES=n.

And ipset updates from Jozsef Kadlecsik:

5) Support updating element extensions when the set is full (fixes
   netfilter bugzilla id 880).

6) Fix set match with 32-bits userspace / 64-bits kernel.

7) Indicate explicitly when /0 networks are supported in ipset.

8) Simplify cidr handling for hash:*net* types.

9) Allocate the proper size of memory when /0 networks are supported.

10) Explicitly add padding elements to hash:net,net and hash:net,port,
    because the elements must be u32 sized for the used hash function.

Jozsef is also cooking ipset RCU conversion which should land soon if
they reach the merge window in time.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-05 20:56:46 -08:00
Scott Feldman 065c212a9e bridge: move private brport flags to if_bridge.h so port drivers can use flags
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:22 -08:00
Scott Feldman cf6b8e1eed bridge: add API to notify bridge driver of learned FBD on offloaded device
When the swdev device learns a new mac/vlan on a port, it sends some async
notification to the driver and the driver installs an FDB in the device.
To give a holistic system view, the learned mac/vlan should be reflected
in the bridge's FBD table, so the user, using normal iproute2 cmds, can view
what is currently learned by the device.  This API on the bridge driver gives
a way for the swdev driver to install an FBD entry in the bridge FBD table.
(And remove one).

This is equivalent to the device running these cmds:

  bridge fdb [add|del] <mac> dev <dev> vid <vlan id> master

This patch needs some extra eyeballs for review, in paricular around the
locking and contexts.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:22 -08:00
Scott Feldman 38dcf357ae bridge: call netdev_sw_port_stp_update when bridge port STP status changes
To notify switch driver of change in STP state of bridge port, add new
.ndo op and provide switchdev wrapper func to call ndo op. Use it in bridge
code then.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:22 -08:00
Jiri Pirko f6f6424ba7 net: make vid as a parameter for ndo_fdb_add/ndo_fdb_del
Do the work of parsing NDA_VLAN directly in rtnetlink code, pass simple
u16 vid to drivers from there.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:18 -08:00
Jiri Pirko 93859b13fa bridge: convert flags in fbd entry into bitfields
Suggested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:17 -08:00
Jiri Pirko 020ec6ba2a bridge: rename fdb_*_hw to fdb_*_hw_addr to avoid confusion
The current name might seem that this actually offloads the fdb entry to
hw. So rename it to clearly present that this for hardware address
addition/removal.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02 20:01:16 -08:00
David S. Miller 60b7379dc5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-11-29 20:47:48 -08:00
Alvaro Neira 1b63d4b9b5 netfilter: nf_tables_bridge: set the pktinfo for IPv4/IPv6 traffic
This patch adds the missing bits to allow to match per meta l4proto from
the bridge. Example:

  nft add rule bridge filter input ether type {ip, ip6} meta l4proto udp counter

Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-27 13:08:29 +01:00
Alvaro Neira 68b0faa87d netfilter: nf_tables_bridge: export nft_reject_ip*hdr_validate functions
This patch exports the functions nft_reject_iphdr_validate and
nft_reject_ip6hdr_validate to use it in follow up patches.
These functions check if the IPv4/IPv6 header is correct.

Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-27 12:58:05 +01:00
Thomas Graf 6f705d8cfc bridge: Add missing policy entry for IFLA_BRPORT_FAST_LEAVE
Fixes: c2d3babf ("bridge: implement multicast fast leave")
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-26 15:29:01 -05:00
David S. Miller 958d03b016 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
netfilter/ipvs updates for net-next

The following patchset contains Netfilter updates for your net-next
tree, this includes the NAT redirection support for nf_tables, the
cgroup support for nft meta and conntrack zone support for the connlimit
match. Coming after those, a bunch of sparse warning fixes, missing
netns bits and cleanups. More specifically, they are:

1) Prepare IPv4 and IPv6 NAT redirect code to use it from nf_tables,
   patches from Arturo Borrero.

2) Introduce the nf_tables redir expression, from Arturo Borrero.

3) Remove an unnecessary assignment in ip_vs_xmit/__ip_vs_get_out_rt().
   Patch from Alex Gartrell.

4) Add nft_log_dereference() macro to the nf_log infrastructure, patch
   from Marcelo Leitner.

5) Add some extra validation when registering logger families, also
   from Marcelo.

6) Some spelling cleanups from stephen hemminger.

7) Fix sparse warning in nf_logger_find_get().

8) Add cgroup support to nf_tables meta, patch from Ana Rey.

9) A Kconfig fix for the new redir expression and fix sparse warnings in
   the new redir expression.

10) Fix several sparse warnings in the netfilter tree, from
    Florian Westphal.

11) Reduce verbosity when OOM in nfnetlink_log. User can basically do
    nothing when this situation occurs.

12) Add conntrack zone support to xt_connlimit, again from Florian.

13) Add netnamespace support to the h323 conntrack helper, contributed
    by Vasily Averin.

14) Remove unnecessary nul-pointer checks before free_percpu() and
    module_put(), from Markus Elfring.

15) Use pr_fmt in nfnetlink_log, again patch from Marcelo Leitner.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-24 16:00:58 -05:00
David S. Miller 1459143386 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ieee802154/fakehard.c

A bug fix went into 'net' for ieee802154/fakehard.c, which is removed
in 'net-next'.

Add build fix into the merge from Stephen Rothwell in openvswitch, the
logging macros take a new initial 'log' argument, a new call was added
in 'net' so when we merge that in here we have to explicitly add the
new 'log' arg to it else the build fails.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-21 22:28:24 -05:00
Jiri Pirko 62749e2cb3 vlan: rename __vlan_put_tag to vlan_insert_tag_set_proto
Name fits better. Plus there's going to be introduced
__vlan_insert_tag later on.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-21 14:20:17 -05:00
Linus Lüssing f0b4eeced5 bridge: fix netfilter/NF_BR_LOCAL_OUT for own, locally generated queries
Ebtables on the OUTPUT chain (NF_BR_LOCAL_OUT) would not work as expected
for both locally generated IGMP and MLD queries. The IP header specific
filter options are off by 14 Bytes for netfilter (actual output on
interfaces is fine).

NF_HOOK() expects the skb->data to point to the IP header, not the
ethernet one (while dev_queue_xmit() does not). Luckily there is an
br_dev_queue_push_xmit() helper function already - let's just use that.

Introduced by eb1d164143
("bridge: Add core IGMP snooping support")

Ebtables example:

$ ebtables -I OUTPUT -p IPv6 -o eth1 --logical-out br0 \
	--log --log-level 6 --log-ip6 --log-prefix="~EBT: " -j DROP

before (broken):

~EBT:  IN= OUT=eth1 MAC source = 02:04:64:a4:39:c2 \
	MAC dest = 33:33:00:00:00:01 proto = 0x86dd IPv6 \
	SRC=64a4:39c2:86dd:6000:0000:0020:0001:fe80 IPv6 \
	DST=0000:0000:0000:0004:64ff:fea4:39c2:ff02, \
	IPv6 priority=0x3, Next Header=2

after (working):

~EBT:  IN= OUT=eth1 MAC source = 02:04:64:a4:39:c2 \
	MAC dest = 33:33:00:00:00:01 proto = 0x86dd IPv6 \
	SRC=fe80:0000:0000:0000:0004:64ff:fea4:39c2 IPv6 \
	DST=ff02:0000:0000:0000:0000:0000:0000:0001, \
	IPv6 priority=0x0, Next Header=0

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-17 12:38:02 +01:00
Florian Westphal 5676864431 netfilter: fix various sparse warnings
net/bridge/br_netfilter.c:870:6: symbol 'br_netfilter_enable' was not declared. Should it be static?
  no; add include
net/ipv4/netfilter/nft_reject_ipv4.c:22:6: symbol 'nft_reject_ipv4_eval' was not declared. Should it be static?
  yes
net/ipv6/netfilter/nf_reject_ipv6.c:16:6: symbol 'nf_send_reset6' was not declared. Should it be static?
  no; add include
net/ipv6/netfilter/nft_reject_ipv6.c:22:6: symbol 'nft_reject_ipv6_eval' was not declared. Should it be static?
  yes
net/netfilter/core.c:33:32: symbol 'nf_ipv6_ops' was not declared. Should it be static?
  no; add include
net/netfilter/xt_DSCP.c:40:57: cast truncates bits from constant value (ffffff03 becomes 3)
net/netfilter/xt_DSCP.c:57:59: cast truncates bits from constant value (ffffff03 becomes 3)
  add __force, 3 is what we want.
net/ipv4/netfilter/nf_log_arp.c:77:6: symbol 'nf_log_arp_packet' was not declared. Should it be static?
  yes
net/ipv4/netfilter/nf_reject_ipv4.c:17:6: symbol 'nf_send_reset' was not declared. Should it be static?
  no; add include

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-13 12:14:42 +01:00
David S. Miller 4e84b496fd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-11-06 22:01:18 -05:00
Guenter Roeck c1207c049b netfilter: nft_reject_bridge: Fix powerpc build error
Fix:
net/bridge/netfilter/nft_reject_bridge.c:
In function 'nft_reject_br_send_v6_unreach':
net/bridge/netfilter/nft_reject_bridge.c:240:3:
	error: implicit declaration of function 'csum_ipv6_magic'
   csum_ipv6_magic(&nip6h->saddr, &nip6h->daddr,
   ^
make[3]: *** [net/bridge/netfilter/nft_reject_bridge.o] Error 1

Seen with powerpc:allmodconfig.

Fixes: 523b929d54 ("netfilter: nft_reject_bridge: don't use IP stack to reject traffic")
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03 12:12:34 -05:00
David S. Miller 55b42b5ca2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/phy/marvell.c

Simple overlapping changes in drivers/net/phy/marvell.c

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-01 14:53:27 -04:00
Pablo Neira Ayuso 127917c29a netfilter: nft_reject_bridge: restrict reject to prerouting and input
Restrict the reject expression to the prerouting and input bridge
hooks. If we allow this to be used from forward or any other later
bridge hook, if the frame is flooded to several ports, we'll end up
sending several reject packets, one per cloned packet.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-31 12:50:09 +01:00
Pablo Neira Ayuso 523b929d54 netfilter: nft_reject_bridge: don't use IP stack to reject traffic
If the packet is received via the bridge stack, this cannot reject
packets from the IP stack.

This adds functions to build the reject packet and send it from the
bridge stack. Comments and assumptions on this patch:

1) Validate the IPv4 and IPv6 headers before further processing,
   given that the packet comes from the bridge stack, we cannot assume
   they are clean. Truncated packets are dropped, we follow similar
   approach in the existing iptables match/target extensions that need
   to inspect layer 4 headers that is not available. This also includes
   packets that are directed to multicast and broadcast ethernet
   addresses.

2) br_deliver() is exported to inject the reject packet via
   bridge localout -> postrouting. So the approach is similar to what
   we already do in the iptables reject target. The reject packet is
   sent to the bridge port from which we have received the original
   packet.

3) The reject packet is forged based on the original packet. The TTL
   is set based on sysctl_ip_default_ttl for IPv4 and per-net
   ipv6.devconf_all hoplimit for IPv6.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-31 12:50:08 +01:00
Pablo Neira Ayuso 4d87716cd0 netfilter: nf_tables_bridge: update hook_mask to allow {pre,post}routing
Fixes: 36d2af5 ("netfilter: nf_tables: allow to filter from prerouting and postrouting")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-31 12:44:56 +01:00
Kyeyoon Park 958501163d bridge: Add support for IEEE 802.11 Proxy ARP
This feature is defined in IEEE Std 802.11-2012, 10.23.13. It allows
the AP devices to keep track of the hardware-address-to-IP-address
mapping of the mobile devices within the WLAN network.

The AP will learn this mapping via observing DHCP, ARP, and NS/NA
frames. When a request for such information is made (i.e. ARP request,
Neighbor Solicitation), the AP will respond on behalf of the
associated mobile device. In the process of doing so, the AP will drop
the multicast request frame that was intended to go out to the wireless
medium.

It was recommended at the LKS workshop to do this implementation in
the bridge layer. vxlan.c is already doing something very similar.
The DHCP snooping code will be added to the userspace application
(hostapd) per the recommendation.

This RFC commit is only for IPv4. A similar approach in the bridge
layer will be taken for IPv6 as well.

Signed-off-by: Kyeyoon Park <kyeyoonp@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-27 19:02:04 -04:00
Herbert Xu 7677e86843 bridge: Do not compile options in br_parse_ip_options
Commit 462fb2af97

	bridge : Sanitize skb before it enters the IP stack

broke when IP options are actually used because it mangles the
skb as if it entered the IP stack which is wrong because the
bridge is supposed to operate below the IP stack.

Since nobody has actually requested for parsing of IP options
this patch fixes it by simply reverting to the previous approach
of ignoring all IP options, i.e., zeroing the IPCB.

If and when somebody who uses IP options and actually needs them
to be parsed by the bridge complains then we can revisit this.

Reported-by: David Newall <davidn@davidnewall.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-24 14:24:03 +02:00