Граф коммитов

85 Коммитов

Автор SHA1 Сообщение Дата
Nikolay Aleksandrov 1f78ee14ee net: bridge: fdb: add support for fine-grained flushing
Add the ability to specify exactly which fdbs to be flushed. They are
described by a new structure - net_bridge_fdb_flush_desc. Currently it
can match on port/bridge ifindex, vlan id and fdb flags. It is used to
describe the existing dynamic fdb flush operation. Note that this flush
operation doesn't treat permanent entries in a special way (fdb_delete vs
fdb_delete_local), it will delete them regardless if any port is using
them, so currently it can't directly replace deletes which need to handle
that case, although we can extend it later for that too.

Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-13 12:46:26 +01:00
Jakub Kicinski aec53e60e0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
  commit 077cdda764 ("net/mlx5e: TC, Fix memory leak with rules with internal port")
  commit 31108d142f ("net/mlx5: Fix some error handling paths in 'mlx5e_tc_add_fdb_flow()'")
  commit 4390c6edc0 ("net/mlx5: Fix some error handling paths in 'mlx5e_tc_add_fdb_flow()'")
  https://lore.kernel.org/all/20211229065352.30178-1-saeed@kernel.org/

net/smc/smc_wr.c
  commit 49dc9013e3 ("net/smc: Use the bitmap API when applicable")
  commit 349d43127d ("net/smc: fix kernel panic caused by race of smc_sock")
  bitmap_zero()/memset() is removed by the fix

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-30 12:12:12 -08:00
Nikolay Aleksandrov f83a112bd9 net: bridge: mcast: add and enforce startup query interval minimum
As reported[1] if startup query interval is set too low in combination with
large number of startup queries and we have multiple bridges or even a
single bridge with multiple querier vlans configured we can crash the
machine. Add a 1 second minimum which must be enforced by overwriting the
value if set lower (i.e. without returning an error) to avoid breaking
user-space. If that happens a log message is emitted to let the admin know
that the startup interval has been set to the minimum. It doesn't make
sense to make the startup interval lower than the normal query interval
so use the same value of 1 second. The issue has been present since these
intervals could be user-controlled.

[1] https://lore.kernel.org/netdev/e8b9ce41-57b9-b6e2-a46a-ff9c791cf0ba@gmail.com/

Fixes: d902eee43f ("bridge: Add multicast count/interval sysfs entries")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-29 12:59:38 -08:00
Nikolay Aleksandrov 99b4061095 net: bridge: mcast: add and enforce query interval minimum
As reported[1] if query interval is set too low and we have multiple
bridges or even a single bridge with multiple querier vlans configured
we can crash the machine. Add a 1 second minimum which must be enforced
by overwriting the value if set lower (i.e. without returning an error) to
avoid breaking user-space. If that happens a log message is emitted to let
the administrator know that the interval has been set to the minimum.
The issue has been present since these intervals could be user-controlled.

[1] https://lore.kernel.org/netdev/e8b9ce41-57b9-b6e2-a46a-ff9c791cf0ba@gmail.com/

Fixes: d902eee43f ("bridge: Add multicast count/interval sysfs entries")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-29 12:59:37 -08:00
Ido Schimmel 5a45ab3f24 net: bridge: Allow base 16 inputs in sysfs
Cited commit converted simple_strtoul() to kstrtoul() as suggested by
the former's documentation. However, it also forced all the inputs to be
decimal resulting in user space breakage.

Fix by setting the base to '0' so that the base is automatically
detected.

Before:

 # ip link add name br0 type bridge vlan_filtering 1
 # echo "0x88a8" > /sys/class/net/br0/bridge/vlan_protocol
 bash: echo: write error: Invalid argument

After:

 # ip link add name br0 type bridge vlan_filtering 1
 # echo "0x88a8" > /sys/class/net/br0/bridge/vlan_protocol
 # echo $?
 0

Fixes: 520fbdf7fb ("net/bridge: replace simple_strtoul to kstrtol")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20211124101122.3321496-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-11-24 17:23:52 -08:00
Bernard Zhao 520fbdf7fb net/bridge: replace simple_strtoul to kstrtol
simple_strtoull is obsolete, use kstrtol instead.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-11-19 14:16:42 +00:00
Nikolay Aleksandrov a97df080b6 net: bridge: vlan: add support for mcast router global option
Add support to change and retrieve global vlan multicast router state
which is used for the bridge itself. We just need to pass multicast context
to br_multicast_set_router instead of bridge device and the rest of the
logic remains the same.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-11 13:34:41 +01:00
Nikolay Aleksandrov 62938182c3 net: bridge: vlan: add support for mcast querier global option
Add support to change and retrieve global vlan multicast querier state.
We just need to pass multicast context to br_multicast_set_querier
instead of bridge device and the rest of the logic remains the same.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-11 13:34:41 +01:00
Nikolay Aleksandrov 4d5b4e84c7 net: bridge: mcast: move querier state to the multicast context
We need to have the querier state per multicast context in order to have
per-vlan control, so remove the internal option bit and move it to the
multicast context. Also annotate the lockless reads of the new variable.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-11 13:34:41 +01:00
Nikolay Aleksandrov df271cd641 net: bridge: vlan: add support for mcast igmp/mld version global options
Add support to change and retrieve global vlan IGMP/MLD versions.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-11 13:34:41 +01:00
Nikolay Aleksandrov d3d065c003 net: bridge: multicast: factor out bridge multicast context
Factor out the bridge's global multicast context into a separate
structure which will later be used for per-vlan global context.
No functional changes intended.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-20 05:41:19 -07:00
Florian Fainelli ae1ea84b33 net: bridge: propagate error code and extack from br_mc_disabled_update
Some Ethernet switches might only be able to support disabling multicast
snooping globally, which is an issue for example when several bridges
span the same physical device and request contradictory settings.

Propagate the return value of br_mc_disabled_update() such that this
limitation is transmitted correctly to user-space.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-14 14:32:05 -07:00
Vladimir Oltean 9e781401cb net: bridge: propagate extack through store_bridge_parm
The bridge sysfs interface stores parameters for the STP, VLAN,
multicast etc subsystems using a predefined function prototype.
Sometimes the underlying function being called supports a netlink
extended ack message, and we ignore it.

Let's expand the store_bridge_parm function prototype to include the
extack, and just print it to console, but at least propagate it where
applicable. Where not applicable, create a shim function in the
br_sysfs_br.c file that discards the extra function argument.

This patch allows us to propagate the extack argument to
br_vlan_set_default_pvid, br_vlan_set_proto and br_vlan_filter_toggle,
and from there, further up in br_changelink from br_netlink.c.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-14 17:38:11 -08:00
Nikolay Aleksandrov 1e16f382ae net: bridge: add warning comments to avoid extending sysfs
We're moving to netlink-only options, so add comments in the bridge's
sysfs files to warn against adding any new sysfs entries.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-29 21:33:02 -08:00
Horatiu Vultur 419dba8a49 net: bridge: Add checks for enabling the STP.
It is not possible to have the MRP and STP running at the same time on the
bridge, therefore add check when enabling the STP to check if MRP is already
enabled. In that case return error.

Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27 11:40:25 -07:00
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00
Nikolay Aleksandrov cf332bca56 net: bridge: mark hash_elasticity as obsolete
Now that the bridge multicast uses the generic rhashtable interface we
can drop the hash_elasticity option as that is already done for us and
it's hardcoded to a maximum of RHT_ELASTICITY (16 currently). Add a
warning about the obsolete option when the hash_elasticity is set.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-05 17:01:51 -08:00
Nikolay Aleksandrov 19e3a9c90c net: bridge: convert multicast to generic rhashtable
The bridge multicast code currently uses a custom resizable hashtable
which predates the generic rhashtable interface. It has many
shortcomings compared and duplicates functionality that is presently
available via the generic rhashtable, so this patch removes the custom
rhashtable implementation in favor of the kernel's generic rhashtable.
The hash maximum is kept and the rhashtable's size is used to do a loose
check if it's reached in which case we revert to the old behaviour and
disable further bridge multicast processing. Also now we can support any
hash maximum, doesn't need to be a power of 2.

v3: add non-rcu br_mdb_get variant and use it where multicast_lock is
    held to avoid RCU splat, drop hash_max function and just set it
    directly

v2: handle when IGMP snooping is undefined, add br_mdb_init/uninit
    placeholders

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-05 17:01:51 -08:00
Nikolay Aleksandrov 70e4272b4c net: bridge: add no_linklocal_learn bool option
Use the new boolopt API to add an option which disables learning from
link-local packets. The default is kept as before and learning is
enabled. This is a simple map from a boolopt bit to a bridge private
flag that is tested before learning.

v2: pass NULL for extack via sysfs

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-27 15:04:15 -08:00
Nikolay Aleksandrov 9163a0fc1f net: bridge: add support for per-port vlan stats
This patch adds an option to have per-port vlan stats instead of the
default global stats. The option can be set only when there are no port
vlans in the bridge since we need to allocate the stats if it is set
when vlans are being added to ports (and respectively free them
when being deleted). Also bump RTNL_MAX_TYPE as the bridge is the
largest user of options. The current stats design allows us to add
these without any changes to the fast-path, it all comes down to
the per-vlan stats pointer which, if this option is enabled, will
be allocated for each port vlan instead of using the global bridge-wide
one.

CC: bridge@lists.linux-foundation.org
CC: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-12 10:18:58 -07:00
Nikolay Aleksandrov 675779adbf net: bridge: convert mcast options to bits
This patch converts the rest of the mcast options to bits. It also packs
the mcast options a little better by moving multicast_mld_version to an
existing hole, reducing the net_bridge size by 8 bytes.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-26 10:04:23 -07:00
Nikolay Aleksandrov 13cefad2f2 net: bridge: convert and rename mcast disabled
Convert mcast disabled to an option bit and while doing so convert the
logic to check if multicast is enabled instead. That is make the logic
follow the option value - if it's set then mcast is enabled and vice versa.
This avoids a few confusing places where we inverted the value that's being
set to follow the mcast_disabled logic.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-26 10:04:23 -07:00
Nikolay Aleksandrov be3664a038 net: bridge: convert group_addr_set option to a bit
Convert group_addr_set internal bridge opt to a bit.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-26 10:04:23 -07:00
Nikolay Aleksandrov 8df3510f28 net: bridge: convert nf call options to bits
No functional change, convert of nf_call_[ip|ip6|arp]tables to bits.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-26 10:04:23 -07:00
Nikolay Aleksandrov ae75767ec2 net: bridge: add bitfield for options and convert vlan opts
Bridge options have usually been added as separate fields all over the
net_bridge struct taking up space and ending up in different cache lines.
Let's move them to a single bitfield to save up space and speedup lookups.
This patch adds a simple API for option modifying and retrieving using
bitops and converts the first user of the API - the bridge vlan options
(vlan_enabled and vlan_stats_enabled).

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-26 10:04:22 -07:00
Joe Perches d6444062f8 net: Use octal not symbolic permissions
Prefer the direct use of octal for permissions.

Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace
and some typing.

Miscellanea:

o Whitespace neatening around these conversions.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-26 12:07:48 -04:00
Andy Shevchenko 223b229b63 bridge: Use helpers to handle MAC address
Use
	%pM to print MAC
	mac_pton() to convert it from ASCII to binary format, and
	ether_addr_copy() to copy.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-20 12:46:11 -05:00
Arvind Yadav cddbb79f7a net: bridge: constify attribute_group structures.
attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   2645	    896	      0	   3541	    dd5	net/bridge/br_sysfs_br.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   2701	    832	      0	   3533	    dcd	net/bridge/br_sysfs_br.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-29 15:48:52 -04:00
Ingo Molnar 174cd4b1e5 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:32 +01:00
Nikolay Aleksandrov f7cdee8a79 bridge: move to workqueue gc
Move the fdb garbage collector to a workqueue which fires at least 10
milliseconds apart and cleans chain by chain allowing for other tasks
to run in the meantime. When having thousands of fdbs the system is much
more responsive. Most importantly remove the need to check if the
matched entry has expired in __br_fdb_get that causes false-sharing and
is completely unnecessary if we cleanup entries, at worst we'll get 10ms
of traffic for that entry before it gets deleted.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06 22:53:13 -05:00
David S. Miller c63d352f05 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-12-06 21:33:19 -05:00
Pan Bian b59589635f net: bridge: set error code on failure
Function br_sysfs_addbr() does not set error code when the call
kobject_create_and_add() returns a NULL pointer. It may be better to
return "-ENOMEM" when kobject_create_and_add() fails.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188781

Signed-off-by: Pan Bian <bianpan2016@163.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-05 13:26:22 -05:00
Nikolay Aleksandrov aa2ae3e71c bridge: mcast: add MLDv2 querier support
This patch adds basic support for MLDv2 queries, the default is MLDv1
as before. A new multicast option - multicast_mld_version, adds the
ability to change it between 1 and 2 via netlink and sysfs.
The MLD option is disabled if CONFIG_IPV6 is disabled.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-21 13:16:58 -05:00
Nikolay Aleksandrov 5e9235853d bridge: mcast: add IGMPv3 query support
This patch adds basic support for IGMPv3 queries, the default is IGMPv2
as before. A new multicast option - multicast_igmp_version, adds the
ability to change it between 2 and 3 via netlink and sysfs. The option
struct member is in a 4 byte hole in net_bridge.

There also a few minor style adjustments in br_multicast_new_group and
br_multicast_add_group.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-21 13:16:58 -05:00
Nikolay Aleksandrov 1080ab95e3 net: bridge: add support for IGMP/MLD stats and export them via netlink
This patch adds stats support for the currently used IGMP/MLD types by the
bridge. The stats are per-port (plus one stat per-bridge) and per-direction
(RX/TX). The stats are exported via netlink via the new linkxstats API
(RTM_GETSTATS). In order to minimize the performance impact, a new option
is used to enable/disable the stats - multicast_stats_enabled, similar to
the recent vlan stats. Also in order to avoid multiple IGMP/MLD type
lookups and checks, we make use of the current "igmp" member of the bridge
private skb->cb region to record the type on Rx (both host-generated and
external packets pass by multicast_rcv()). We can do that since the igmp
member was used as a boolean and all the valid IGMP/MLD types are positive
values. The normal bridge fast-path is not affected at all, the only
affected paths are the flooding ones and since we make use of the IGMP/MLD
type, we can quickly determine if the packet should be counted using
cache-hot data (cb's igmp member). We add counters for:
* IGMP Queries
* IGMP Leaves
* IGMP v1/v2/v3 reports

* MLD Queries
* MLD Leaves
* MLD v1/v2 reports

These are invaluable when monitoring or debugging complex multicast setups
with bridges.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-30 06:18:24 -04:00
Nikolay Aleksandrov 6dada9b10a bridge: vlan: learn to count
Add support for per-VLAN Tx/Rx statistics. Every global vlan context gets
allocated a per-cpu stats which is then set in each per-port vlan context
for quick access. The br_allowed_ingress() common function is used to
account for Rx packets and the br_handle_vlan() common function is used
to account for Tx packets. Stats accounting is performed only if the
bridge-wide vlan_stats_enabled option is set either via sysfs or netlink.
A struct hole between vlan_enabled and vlan_proto is used for the new
option so it is in the same cache line. Currently it is binary (on/off)
but it is intentionally restricted to exactly 0 and 1 since other values
will be used in the future for different purposes (e.g. per-port stats).

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-02 22:27:06 -04:00
Xin Long 047831a9b9 bridge: a netlink notification should be sent when those attributes are changed by br_sysfs_br
Now when we change the attributes of bridge or br_port by netlink,
a relevant netlink notification will be sent, but if we change them
by ioctl or sysfs, no notification will be sent.

We should ensure that whenever those attributes change internally or from
sysfs/ioctl, that a netlink notification is sent out to listeners.

Also, NetworkManager will use this in the future to listen for out-of-band
bridge master attribute updates and incorporate them into the runtime
configuration.

This patch is used for br_sysfs_br. and we also need to remove some
rtnl_trylock in old functions so that we can call it in a common one.

For group_addr_store, we cannot make it use store_bridge_parm, because
it's not a string-to-long convert, we will add notification on it
individually.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-13 22:42:33 -04:00
Xin Long 4436156b6f bridge: simplify the stp_state_store by calling store_bridge_parm
There are some repetitive codes in stp_state_store, we can remove
them by calling store_bridge_parm.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-13 22:42:32 -04:00
Xin Long 347db6b49e bridge: simplify the forward_delay_store by calling store_bridge_parm
There are some repetitive codes in forward_delay_store, we can remove
them by calling store_bridge_parm.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-13 22:42:32 -04:00
Xin Long 14f31bb39f bridge: simplify the flush_store by calling store_bridge_parm
There are some repetitive codes in flush_store, we can remove
them by calling store_bridge_parm, also, it would send rtnl notification
after we add it in store_bridge_parm in the following patches.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-13 22:42:32 -04:00
Geliang Tang aeb7ed14fe bridge: use kobj_to_dev instead of to_dev
kobj_to_dev has been defined in linux/device.h, so I replace to_dev
with it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-23 22:26:48 -05:00
Nikolay Aleksandrov af3793921d bridge: fix gc_timer mod/del race condition
commit c62987bbd8 ("bridge: push bridge setting ageing_time down to
switchdev") introduced a timer race condition because the gc_timer can
get rearmed after it's supposedly stopped and flushed in br_dev_delete()
leading to a use of freed memory. So take rtnl to sync with bridge
destruction when setting ageing_timer.
Here's the trace reproduced with these two commands running in parallel:
while :; do echo 10000 > /sys/class/net/br0/bridge/ageing_timer; done;
while :; do brctl addbr br0; ip l set br0 up; ip l set br0 down;
brctl delbr br0; done;

[  300.000029] BUG: unable to handle kernel paging request at
ffffffff811c59d3
[  300.000263] IP: [<ffffffff810f168e>] __internal_add_timer+0x2e/0xd0
[  300.000422] PGD 1a0f067 PUD 1a10063 PMD 10001e1
[  300.000639] Oops: 0003 [#1] SMP
[  300.000793] Modules linked in: bridge stp llc nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd grace fscache sunrpc crct10dif_pclmul
crc32_pclmul crc32c_intel ghash_clmulni_intel ppdev aesni_intel
aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd
snd_hda_codec_generic qxl drm_kms_helper psmouse pcspkr ttm
snd_hda_intel 9pnet_virtio evdev serio_raw joydev snd_hda_codec 9pnet
virtio_balloon drm snd_hwdep virtio_console snd_hda_core pvpanic snd_pcm
i2c_piix4 snd_timer acpi_cpufreq parport_pc snd parport soundcore button
processor i2c_core ipv6 autofs4 hid_generic usbhid hid ext4 crc16
mbcache jbd2 sg sr_mod cdrom ata_generic virtio_blk virtio_net e1000
ehci_pci uhci_hcd ehci_hcd usbcore usb_common floppy ata_piix libata
virtio_pci virtio_ring virtio scsi_mod
[  300.004008] CPU: 1 PID: 1169 Comm: bash Not tainted 4.3.0-rc3+ #46
[  300.004008] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  300.004008] task: ffff880035be2200 ti: ffff88003795c000 task.ti:
ffff88003795c000
[  300.004008] RIP: 0010:[<ffffffff810f168e>]  [<ffffffff810f168e>]
__internal_add_timer+0x2e/0xd0
[  300.004008] RSP: 0018:ffff88003fd03e78  EFLAGS: 00010046
[  300.004008] RAX: ffff88003fd0ef60 RBX: 840fc78949c08548 RCX:
00000001ffffffff
[  300.004008] RDX: 0000000000000000 RSI: ffffffff811c59d3 RDI:
ffff88003fd0df00
[  300.004008] RBP: ffff88003fd03e78 R08: 00000000ffffffff R09:
0000000000000000
[  300.004008] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff88003fd0df00
[  300.004008] R13: 0000000000000000 R14: 0000000000000001 R15:
ffffffff816032e0
[  300.004008] FS:  00007fcbdd609700(0000) GS:ffff88003fd00000(0000)
knlGS:0000000000000000
[  300.004008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  300.004008] CR2: ffffffff811c59d3 CR3: 0000000037879000 CR4:
00000000000406e0
[  300.004008] Stack:
[  300.004008]  ffff88003fd03ea8 ffffffff810f1775 ffff88003c8cb958
ffff88003fd0df00
[  300.004008]  0000000000000000 0000000000000001 ffff88003fd03f18
ffffffff810f28c4
[  300.004008]  ffff88003fd0eb68 ffff88003fd0e968 ffff88003fd0e768
ffff88003fd0df68
[  300.004008] Call Trace:
[  300.004008]  <IRQ>
[  300.004008]  [<ffffffff810f1775>] cascade+0x45/0x70
[  300.004008]  [<ffffffff810f28c4>] run_timer_softirq+0x2f4/0x340
[  300.004008]  [<ffffffff8107e380>] __do_softirq+0xd0/0x440
[  300.004008]  [<ffffffff8107e8a3>] irq_exit+0xb3/0xc0
[  300.004008]  [<ffffffff815c2032>] smp_apic_timer_interrupt+0x42/0x50
[  300.004008]  [<ffffffff815bfe37>] apic_timer_interrupt+0x87/0x90
[  300.004008]  <EOI>
[  300.004008]  [<ffffffff811fb80c>] ? create_object+0x13c/0x2e0
[  300.004008]  [<ffffffff8109b23e>] ? __kernel_text_address+0x4e/0x70
[  300.004008]  [<ffffffff8109b23e>] ? __kernel_text_address+0x4e/0x70
[  300.004008]  [<ffffffff8101e17f>] print_context_stack+0x7f/0xf0
[  300.004008]  [<ffffffff8101d55b>] dump_trace+0x11b/0x300
[  300.004008]  [<ffffffff8102970b>] save_stack_trace+0x2b/0x50
[  300.004008]  [<ffffffff811fb80c>] create_object+0x13c/0x2e0
[  300.004008]  [<ffffffff815b2e8e>] kmemleak_alloc+0x4e/0xb0
[  300.004008]  [<ffffffff811e475d>] kmem_cache_alloc_trace+0x18d/0x2f0
[  300.004008]  [<ffffffff8128b139>] kernfs_fop_open+0xc9/0x380
[  300.004008]  [<ffffffff8120214f>] do_dentry_open+0x1ff/0x2f0
[  300.004008]  [<ffffffff8128b070>] ? kernfs_fop_release+0x70/0x70
[  300.004008]  [<ffffffff812034f9>] vfs_open+0x59/0x60
[  300.004008]  [<ffffffff812130de>] path_openat+0x1ce/0x1260
[  300.004008]  [<ffffffff812154ae>] do_filp_open+0x7e/0xe0
[  300.004008]  [<ffffffff812251ff>] ? __alloc_fd+0xaf/0x180
[  300.004008]  [<ffffffff8120387b>] do_sys_open+0x12b/0x210
[  300.004008]  [<ffffffff8120397e>] SyS_open+0x1e/0x20
[  300.004008]  [<ffffffff815bf0b6>] entry_SYSCALL_64_fastpath+0x16/0x7a
[  300.004008] Code: 66 90 48 8b 46 10 48 8b 4f 40 55 48 89 c2 48 89 e5
48 29 ca 48 81 fa ff 00 00 00 77 20 0f b6 c0 48 8d 44 c7 68 48 8b 10 48
85 d2 <48> 89 16 74 04 48 89 72 08 48 89 30 48 89 46 08 5d c3 48 81 fa
[  300.004008] RIP  [<ffffffff810f168e>] __internal_add_timer+0x2e/0xd0
[  300.004008]  RSP <ffff88003fd03e78>
[  300.004008] CR2: ffffffff811c59d3

Fixes: c62987bbd8 ("bridge: push bridge setting ageing_time down to switchdev")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-13 04:50:17 -07:00
Scott Feldman c62987bbd8 bridge: push bridge setting ageing_time down to switchdev
Use SWITCHDEV_F_SKIP_EOPNOTSUPP to skip over ports in bridge that don't
support setting ageing_time (or setting bridge attrs in general).

If push fails, don't update ageing_time in bridge and return err to user.

If push succeeds, update ageing_time in bridge and run gc_timer now to
recalabrate when to run gc_timer next, based on new ageing_time.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-12 05:20:20 -07:00
Vlad Yasevich 96a20d9d7f bridge: Add a default_pvid sysfs attribute
This patch allows the user to set and retrieve default_pvid
value.  A new value can only be stored when vlan filtering
is disabled.

Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-05 21:21:36 -04:00
Pablo Neira Ayuso 34666d467c netfilter: bridge: move br_netfilter out of the core
Jesper reported that br_netfilter always registers the hooks since
this is part of the bridge core. This harms performance for people that
don't need this.

This patch modularizes br_netfilter so it can be rmmod'ed, thus,
the hooks can be unregistered. I think the bridge netfilter should have
been a separated module since the beginning, Patrick agreed on that.

Note that this is breaking compatibility for users that expect that
bridge netfilter is going to be available after explicitly 'modprobe
bridge' or via automatic load through brctl.

However, the damage can be easily undone by modprobing br_netfilter.
The bridge core also spots a message to provide a clue to people that
didn't notice that this has been deprecated.

On top of that, the plan is that nftables will not rely on this software
layer, but integrate the connection tracking into the bridge layer to
enable stateful filtering and NAT, which is was bridge netfilter users
seem to require.

This patch still keeps the fake_dst_ops in the bridge core, since this
is required by when the bridge port is initialized. So we can safely
modprobe/rmmod br_netfilter anytime.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
2014-09-26 18:42:31 +02:00
Toshiaki Makita 204177f3f3 bridge: Support 802.1ad vlan filtering
This enables us to change the vlan protocol for vlan filtering.
We come to be able to filter frames on the basis of 802.1ad vlan tags
through a bridge.

This also changes br->group_addr if it has not been set by user.
This is needed for an 802.1ad bridge.
(See IEEE 802.1Q-2011 8.13.5.)

Furthermore, this sets br->group_fwd_mask_required so that an 802.1ad
bridge can forward the Nearest Customer Bridge group addresses except
for br->group_addr, which should be passed to higher layer.

To change the vlan protocol, write a protocol in sysfs:
# echo 0x88a8 > /sys/class/net/br0/bridge/vlan_protocol

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11 15:22:53 -07:00
sfeldma@cumulusnetworks.com fbf2671bb8 bridge: use DEVICE_ATTR_xx macros
Use DEVICE_ATTR_RO/RW macros to simplify bridge sysfs attribute definitions.

Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-06 16:40:46 -05:00
Wang Sheng-Hui 15401946f9 bridge: correct the comment for file br_sysfs_br.c
br_sysfs_if.c is for sysfs attributes of bridge ports, while br_sysfs_br.c
is for sysfs attributes of bridge itself. Correct the comment here.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-08-07 10:35:06 -07:00
Cong Wang 1c8ad5bfa2 bridge: use the bridge IP addr as source addr for querier
Quote from Adam:
"If it is believed that the use of 0.0.0.0
as the IP address is what is causing strange behaviour on other devices
then is there a good reason that a bridge rather than a router shouldn't
be the active querier? If not then using the bridge IP address and
having the querier enabled by default may be a reasonable solution
(provided that our querier obeys the election rules and shuts up if it
sees a query from a lower IP address that isn't 0.0.0.0). Just because a
device is the elected querier for IGMP doesn't appear to mean it is
required to perform any other routing functions."

And introduce a new troggle for it, as suggested by Herbert.

Suggested-by: Adam Baker <linux@baker-net.org.uk>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adam Baker <linux@baker-net.org.uk>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-22 14:54:37 -07:00
Vlad Yasevich 243a2e63f5 bridge: Add vlan filtering infrastructure
Adds an optional infrustructure component to bridge that would allow
native vlan filtering in the bridge.  Each bridge port (as well
as the bridge device) now get a VLAN bitmap.  Each bit in the bitmap
is associated with a vlan id.  This way if the bit corresponding to
the vid is set in the bitmap that the packet with vid is allowed to
enter and exit the port.

Write access the bitmap is protected by RTNL and read access
protected by RCU.

Vlan functionality is disabled by default.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-13 19:41:46 -05:00