Commit Graph

1388 Commits

Author SHA1 Message Date
Vlad Yasevich
8a921265e2 Revert "bridge: Allow forward delay to be cfgd when STP enabled"
This reverts commit 34c2d9fb04.

There are 2 reasons for this revert:
 1)  The commit in question doesn't do what it says it does.  The
     description reads: "Allow bridge forward delay to be configured
     when Spanning Tree is enabled."  This was already the case before
     the commit was made.  What the commit actually do was disallow
     invalid values or 'forward_delay' when STP was turned off.

 2)  The above change was actually a change in the user observed
     behavior and broke things like libvirt and other network configs
     that set 'forward_delay' to 0 without enabling STP.  The value
     of 0 is actually used when STP is turned off to immediately mark
     the bridge as forwarding.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-10 15:41:36 -05:00
Ido Schimmel
eca1e006cf bridge: vlan: Use rcu_dereference instead of rtnl_dereference
br_should_learn() is protected by RCU and not by RTNL, so use correct
flavor of nbp_vlan_group().

Fixes: 907b1e6e83 ("bridge: vlan: use proper rcu for the vlgrp
member")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-02 16:27:39 -05:00
Ido Schimmel
ddd611d3ff bridge: vlan: Use correct flag name in comment
The flag used to indicate if a VLAN should be used for filtering - as
opposed to context only - on the bridge itself (e.g. br0) is called
'brentry' and not 'brvlan'.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-02 15:40:11 -05:00
Ido Schimmel
07bc588fc1 bridge: vlan: Prevent possible use-after-free
When adding a port to a bridge we initialize VLAN filtering on it. We do
not bail out in case an error occurred in nbp_vlan_init, as it can be
used as a non VLAN filtering bridge.

However, if VLAN filtering is required and an error occurred in
nbp_vlan_init, we should set vlgrp to NULL, so that VLAN filtering
functions (e.g. br_vlan_find, br_get_pvid) will know the struct is
invalid and will not try to access it.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-02 15:40:10 -05:00
Roopa Prabhu
b7af1472af bridge: set is_local and is_static before fdb entry is added to the fdb hashtable
Problem Description:
We can add fdbs pointing to the bridge with NULL ->dst but that has a
few race conditions because br_fdb_insert() is used which first creates
the fdb and then, after the fdb has been published/linked, sets
"is_local" to 1 and in that time frame if a packet arrives for that fdb
it may see it as non-local and either do a NULL ptr dereference in
br_forward() or attach the fdb to the port where it arrived, and later
br_fdb_insert() will make it local thus getting a wrong fdb entry.
Call chain br_handle_frame_finish() -> br_forward():
But in br_handle_frame_finish() in order to call br_forward() the dst
should not be local i.e. skb != NULL, whenever the dst is
found to be local skb is set to NULL so we can't forward it,
and here comes the problem since it's running only
with RCU when forwarding packets it can see the entry before "is_local"
is set to 1 and actually try to dereference NULL.
The main issue is that if someone sends a packet to the switch while
it's adding the entry which points to the bridge device, it may
dereference NULL ptr. This is needed now after we can add fdbs
pointing to the bridge.  This poses a problem for
br_fdb_update() as well, while someone's adding a bridge fdb, but
before it has is_local == 1, it might get moved to a port if it comes
as a source mac and then it may get its "is_local" set to 1

This patch changes fdb_create to take is_local and is_static as
arguments to set these values in the fdb entry before it is added to the
hash. Also adds null check for port in br_forward.

Fixes: 3741873b4f ("bridge: allow adding of fdb entries pointing to the bridge device")
Reported-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-30 12:13:05 +09:00
Arad, Ronen
b1974ed05e netlink: Rightsize IFLA_AF_SPEC size calculation
if_nlmsg_size() overestimates the minimum allocation size of netlink
dump request (when called from rtnl_calcit()) or the size of the
message (when called from rtnl_getlink()). This is because
ext_filter_mask is not supported by rtnl_link_get_af_size() and
rtnl_link_get_size().

The over-estimation is significant when at least one netdev has many
VLANs configured (8 bytes for each configured VLAN).

This patch-set "rightsizes" the protocol specific attribute size
calculation by propagating ext_filter_mask to rtnl_link_get_af_size()
and adding this a argument to get_link_af_size op in rtnl_af_ops.

Bridge module already used filtering aware sizing for notifications.
br_get_link_af_size_filtered() is consistent with the modified
get_link_af_size op so it replaces br_get_link_af_size() in br_af_ops.
br_get_link_af_size() becomes unused and thus removed.

Signed-off-by: Ronen Arad <ronen.arad@intel.com>
Acked-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-21 19:15:20 -07:00
Elad Raz
6ac311ae8b Adding switchdev ageing notification on port bridged
Configure ageing time to the HW for newly bridged device

CC: Scott Feldman <sfeldma@gmail.com>
CC: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Elad Raz <eladr@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-21 07:50:57 -07:00
Pablo Neira Ayuso
f0a0a978b6 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
This merge resolves conflicts with 75aec9df3a ("bridge: Remove
br_nf_push_frag_xmit_sk") as part of Eric Biederman's effort to improve
netns support in the network stack that reached upstream via David's
net-next tree.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Conflicts:
	net/bridge/br_netfilter_hooks.c
2015-10-17 14:28:03 +02:00
Florian Westphal
2ffbceb2b0 netfilter: remove hook owner refcounting
since commit 8405a8fff3 ("netfilter: nf_qeueue: Drop queue entries on
nf_unregister_hook") all pending queued entries are discarded.

So we can simply remove all of the owner handling -- when module is
removed it also needs to unregister all its hooks.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-10-16 18:21:39 +02:00
Jiri Pirko
56607386e8 bridge: defer switchdev fdb del call in fdb_del_external_learn
Since spinlock is held here, defer the switchdev operation. Also, ensure
that defered switchdev ops are processed before port master device
is unlinked.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-15 06:09:50 -07:00
Jiri Pirko
850d0cbc91 switchdev: remove pointers from switchdev objects
When object is used in deferred work, we cannot use pointers in
switchdev object structures because the memory they point at may be already
used by someone else. So rather do local copy of the value.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-15 06:09:49 -07:00
Jiri Pirko
0bc05d585d switchdev: allow caller to explicitly request attr_set as deferred
Caller should know if he can call attr_set directly (when holding RTNL)
or if he has to defer the att_set processing for later.

This also allows drivers to sleep inside attr_set and report operation
status back to switchdev core. Switchdev core then warns if status is
not ok, instead of silent errors happening in drivers.

Benefit from newly introduced switchdev deferred ops infrastructure.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-15 06:09:48 -07:00
Nikolay Aleksandrov
f409d0ed87 bridge: vlan: move back vlan_flush
Ido Schimmel reported a problem with switchdev devices because of the
order change of del_nbp operations, more specifically the move of
nbp_vlan_flush() which deletes all vlans and frees vlgrp after the
rx_handler has been unregistered. So in order to fix this move
vlan_flush back where it was and make it destroy the rhtable after
NULLing vlgrp and waiting a grace period to make sure noone can see it.

Reported-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-13 04:57:58 -07:00
Nikolay Aleksandrov
b8d02c3cac bridge: vlan: drop unnecessary flush code
As Ido Schimmel pointed out the vlan_vid_del() code in nbp_vlan_flush is
unnecessary (and is actually a remnant of the old vlan code) so we can
remove it.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-13 04:57:56 -07:00
Nikolay Aleksandrov
e9c953eff7 bridge: vlan: use rcu for vlan_list traversal in br_fill_ifinfo
br_fill_ifinfo is called by br_ifinfo_notify which can be called from
many contexts with different locks held, sometimes it relies upon
bridge's spinlock only which is a problem for the vlan code, so use
explicitly rcu for that to avoid problems.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-13 04:57:54 -07:00
Nikolay Aleksandrov
907b1e6e83 bridge: vlan: use proper rcu for the vlgrp member
The bridge and port's vlgrp member is already used in RCU way, currently
we rely on the fact that it cannot disappear while the port exists but
that is error-prone and we might miss places with improper locking
(either RCU or RTNL must be held to walk the vlan_list). So make it
official and use RCU for vlgrp to catch offenders. Introduce proper vlgrp
accessors and use them consistently throughout the code.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-13 04:57:52 -07:00
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
Nikolay Aleksandrov
6623c60dc2 bridge: vlan: enforce no pvid flag in vlan ranges
Currently it's possible for someone to send a vlan range to the kernel
with the pvid flag set which will result in the pvid bouncing from a
vlan to vlan and isn't correct, it also introduces problems for hardware
where it doesn't make sense having more than 1 pvid. iproute2 already
enforces this, so let's enforce it on kernel-side as well.

Reported-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-12 19:59:15 -07:00
Jiri Pirko
0944d6b5a2 bridge: try switchdev op first in __vlan_vid_add/del
Some drivers need to implement both switchdev vlan ops and
vid_add/kill ndos. For that to work in bridge code, we need to try
switchdev op first when adding/deleting vlan id.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-12 19:35:20 -07:00
Arnd Bergmann
c932245811 netfilter: bridge: avoid unused label warning
With the ARM mini2440_defconfig, the bridge netfilter code gets
built with both CONFIG_NF_DEFRAG_IPV4 and CONFIG_NF_DEFRAG_IPV6
disabled, which leads to a harmless gcc warning:

net/bridge/br_netfilter_hooks.c: In function 'br_nf_dev_queue_xmit':
net/bridge/br_netfilter_hooks.c:792:2: warning: label 'drop' defined but not used [-Wunused-label]

This gets rid of the warning by cleaning up the code to avoid
the respective #ifdefs causing this problem, and replacing them
with if(IS_ENABLED()) checks. I have verified that the resulting
object code is unchanged, and an additional advantage is that
we now get compile coverage of the unused functions in more
configurations.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: dd302b59bd ("netfilter: bridge: don't leak skb in error paths")
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-10-12 17:48:36 +02:00
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
Roopa Prabhu
3741873b4f bridge: allow adding of fdb entries pointing to the bridge device
This patch enables adding of fdb entries pointing to the bridge device.
This can be used to propagate mac address of vlan interfaces
configured on top of the vlan filtering bridge.

Before:
$bridge fdb add 44:38:39:00:27:9f dev bridge
RTNETLINK answers: Invalid argument

After:
$bridge fdb add 44:38:39:00:27:9f dev bridge

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-12 05:11:58 -07:00
Nikolay Aleksandrov
5d6ae479ab bridge: netlink: add support for port's multicast_router attribute
Add IFLA_BRPORT_MULTICAST_ROUTER to allow setting/getting port's
multicast_router via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:34 -07:00
Nikolay Aleksandrov
9b0c6e4deb bridge: netlink: allow to flush port's fdb
Add IFLA_BRPORT_FLUSH to allow flushing port's fdb similar to sysfs's
flush.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:32 -07:00
Nikolay Aleksandrov
61c0a9a83e bridge: netlink: export port's timer values
Add the following attributes in order to export port's timer values:
IFLA_BRPORT_MESSAGE_AGE_TIMER, IFLA_BRPORT_FORWARD_DELAY_TIMER and
IFLA_BRPORT_HOLD_TIMER.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:31 -07:00
Nikolay Aleksandrov
e08e838ac5 bridge: netlink: export port's topology_change_ack and config_pending
Add IFLA_BRPORT_TOPOLOGY_CHANGE_ACK and IFLA_BRPORT_CONFIG_PENDING to
allow getting port's topology_change_ack and config_pending respectively
via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:30 -07:00
Nikolay Aleksandrov
42d452c4b5 bridge: netlink: export port's id and number
Add IFLA_BRPORT_(ID|NO) to allow getting port's port_id and port_no
respectively via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:29 -07:00
Nikolay Aleksandrov
96f94e7f4a bridge: netlink: export port's designated cost and port
Add IFLA_BRPORT_DESIGNATED_(COST|PORT) to allow getting the port's
designated cost and port respectively via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:29 -07:00
Nikolay Aleksandrov
80df9a2692 bridge: netlink: export port's bridge id
Add IFLA_BRPORT_BRIDGE_ID to allow getting the designated bridge id via
netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:28 -07:00
Nikolay Aleksandrov
4ebc7660ab bridge: netlink: export port's root id
Add IFLA_BRPORT_ROOT_ID to allow getting the designated root id via
netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:49:27 -07:00
Nikolay Aleksandrov
4917a1548f bridge: netlink: make br_fill_info's frame size smaller
When KASAN is enabled the frame size grows > 2048 bytes and we get a
warning, so make it smaller.
net/bridge/br_netlink.c: In function 'br_fill_info':
>> net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes
>> is larger than 2048 bytes [-Wframe-larger-than=]

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-07 04:15:57 -07:00
David S. Miller
40e106801e Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/net-next
Eric W. Biederman says:

====================
net: Pass net through ip fragmention

This is the next installment of my work to pass struct net through the
output path so the code does not need to guess how to figure out which
network namespace it is in, and ultimately routes can have output
devices in another network namespace.

This round focuses on passing net through ip fragmentation which we seem
to call from about everywhere.  That is the main ip output paths, the
bridge netfilter code, and openvswitch.  This has to happend at once
accross the tree as function pointers are involved.

First some prep work is done, then ipv4 and ipv6 are converted and then
temporary helper functions are removed.
====================

Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-05 03:39:31 -07:00
Nikolay Aleksandrov
0f963b7592 bridge: netlink: add support for default_pvid
Add IFLA_BR_VLAN_DEFAULT_PVID to allow setting/getting bridge's
default_pvid via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:07 -07:00
Nikolay Aleksandrov
93870cc02a bridge: netlink: add support for netfilter tables config
Add support to allow getting/setting netfilter tables settings.
Currently these are IFLA_BR_NF_CALL_IPTABLES, IFLA_BR_NF_CALL_IP6TABLES
and IFLA_BR_NF_CALL_ARPTABLES.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:07 -07:00
Nikolay Aleksandrov
7e4df51eb3 bridge: netlink: add support for igmp's intervals
Add support to set/get all of the igmp's configurable intervals via
netlink. These currently are:
IFLA_BR_MCAST_LAST_MEMBER_INTVL
IFLA_BR_MCAST_MEMBERSHIP_INTVL
IFLA_BR_MCAST_QUERIER_INTVL
IFLA_BR_MCAST_QUERY_INTVL
IFLA_BR_MCAST_QUERY_RESPONSE_INTVL
IFLA_BR_MCAST_STARTUP_QUERY_INTVL

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:06 -07:00
Nikolay Aleksandrov
b89e6babad bridge: netlink: add support for multicast_startup_query_count
Add IFLA_BR_MCAST_STARTUP_QUERY_CNT to allow setting/getting
br->multicast_startup_query_count via netlink. Also align the ifla
comments.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:06 -07:00
Nikolay Aleksandrov
79b859f573 bridge: netlink: add support for multicast_last_member_count
Add IFLA_BR_MCAST_LAST_MEMBER_CNT to allow setting/getting
br->multicast_last_member_count via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:06 -07:00
Nikolay Aleksandrov
858079fdae bridge: netlink: add support for igmp's hash_max
Add IFLA_BR_MCAST_HASH_MAX to allow setting/getting br->hash_max via
netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:06 -07:00
Nikolay Aleksandrov
431db3c050 bridge: netlink: add support for igmp's hash_elasticity
Add IFLA_BR_MCAST_HASH_ELASTICITY to allow setting/getting
br->hash_elasticity via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:05 -07:00
Nikolay Aleksandrov
ba062d7cc6 bridge: netlink: add support for multicast_querier
Add IFLA_BR_MCAST_QUERIER to allow setting/getting br->multicast_querier
via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:04 -07:00
Nikolay Aleksandrov
295141d904 bridge: netlink: add support for multicast_query_use_ifaddr
Add IFLA_BR_MCAST_QUERY_USE_IFADDR to allow setting/getting
br->multicast_query_use_ifaddr via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:03 -07:00
Nikolay Aleksandrov
89126327f9 bridge: netlink: add support for multicast_snooping
Add IFLA_BR_MCAST_SNOOPING to allow enabling/disabling multicast
snooping via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:02 -07:00
Nikolay Aleksandrov
a9a6bc70f5 bridge: netlink: add support for multicast_router
Add IFLA_BR_MCAST_ROUTER to allow setting and retrieving
br->multicast_router when igmp snooping is enabled.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:01 -07:00
Nikolay Aleksandrov
150217c688 bridge: netlink: add fdb flush
Simple attribute that flushes the bridge's fdb.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:46:01 -07:00
Nikolay Aleksandrov
111189abc5 bridge: netlink: add group_addr support
Add IFLA_BR_GROUP_ADDR attribute to allow setting and retrieving the
group_addr via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:59 -07:00
Nikolay Aleksandrov
d76bd14e0f bridge: netlink: export all timers
Export the following bridge timers (also exported via sysfs):
IFLA_BR_HELLO_TIMER, IFLA_BR_TCN_TIMER, IFLA_BR_TOPOLOGY_CHANGE_TIMER,
IFLA_BR_GC_TIMER via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:59 -07:00
Nikolay Aleksandrov
ed4163098e bridge: netlink: export topology_change and topology_change_detected
Add IFLA_BR_TOPOLOGY_CHANGE and IFLA_BR_TOPOLOGY_CHANGE_DETECTED and
export them via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:58 -07:00
Nikolay Aleksandrov
684dd248be bridge: netlink: export root path cost
Add IFLA_BR_ROOT_PATH_COST and export it via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:57 -07:00
Nikolay Aleksandrov
8762ba680f bridge: netlink: export root port
Add IFLA_BR_ROOT_PORT and export it via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:56 -07:00
Nikolay Aleksandrov
7599a2201f bridge: netlink: export bridge id
Add IFLA_BR_BRIDGE_ID and export br->bridge_id via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:55 -07:00
Nikolay Aleksandrov
5127c81f84 bridge: netlink: export root id
Add IFLA_BR_ROOT_ID and export br->designated_root via netlink. For this
purpose add struct ifla_bridge_id that would represent struct bridge_id.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:54 -07:00
Nikolay Aleksandrov
7910228b6b bridge: netlink: add group_fwd_mask support
Add IFLA_BR_GROUP_FWD_MASK attribute to allow setting and retrieving the
group_fwd_mask via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:45:53 -07:00
Nikolay Aleksandrov
6be144f62f bridge: vlan: use br_vlan_should_use to simplify __vlan_add/del
The checks that lead to num_vlans change are always what
br_vlan_should_use checks for, namely if the vlan is only a context or
not and depending on that it's either not counted or counted
as a real/used vlan respectively.
Also give better explanation in br_vlan_should_use's comment.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:43:50 -07:00
Nikolay Aleksandrov
2ffdf508d2 bridge: vlan: drop master_flags from __vlan_add
There's only one user now and we can include the flag directly.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:43:49 -07:00
Nikolay Aleksandrov
f8ed289fab bridge: vlan: use br_vlan_(get|put)_master to deal with refcounts
Introduce br_vlan_(get|put)_master which take a reference (or create the
master vlan first if it didn't exist) and drop a reference respectively.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:43:48 -07:00
Nikolay Aleksandrov
586c2b573e bridge: vlan: use rcu list for the ordered vlan list
When I did the conversion to rhashtable I missed the required locking of
one important user of the vlan list - br_get_link_af_size_filtered()
which is called:
br_ifinfo_notify() -> br_nlmsg_size() -> br_get_link_af_size_filtered()
and the notifications can be sent without holding rtnl. Before this
conversion the function relied on using rcu and since we already use rcu to
destroy the vlans, we can simply migrate the list to use the rcu helpers.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04 16:43:47 -07:00
Jiri Pirko
9e8f4a548a switchdev: push object ID back to object structure
Suggested-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:40 -07:00
Jiri Pirko
648b4a995a switchdev: bring back switchdev_obj and use it as a generic object param
Replace "void *obj" with a generic structure. Introduce couple of
helpers along that.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:39 -07:00
Jiri Pirko
52ba57cfdc switchdev: rename switchdev_obj_fdb to switchdev_obj_port_fdb
Make the struct name in sync with object id name.

Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:39 -07:00
Jiri Pirko
8f24f3095d switchdev: rename switchdev_obj_vlan to switchdev_obj_port_vlan
Make the struct name in sync with object id name.

Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:38 -07:00
Jiri Pirko
1f86839874 switchdev: rename SWITCHDEV_ATTR_* enum values to SWITCHDEV_ATTR_ID_*
To be aligned with obj.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:37 -07:00
Jiri Pirko
57d80838da switchdev: rename SWITCHDEV_OBJ_* enum values to SWITCHDEV_OBJ_ID_*
Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03 04:49:36 -07:00
Nikolay Aleksandrov
248234ca02 bridge: vlan: don't pass flags when creating context only
We should not pass the original flags when creating a context vlan only
because they may contain some flags that change behaviour in the bridge.
The new global context should be with minimal set of flags, so pass 0
and let br_vlan_add() set the master flag only.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01 18:24:05 -07:00
Nikolay Aleksandrov
263344e64c bridge: vlan: fix possible null ptr derefs on port init and deinit
When a new port is being added we need to make vlgrp available after
rhashtable has been initialized and when removing a port we need to
flush the vlans and free the resources after we're sure noone can use
the port, i.e. after it's removed from the port list and synchronize_rcu
is executed.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01 18:24:05 -07:00
Nikolay Aleksandrov
77751ee8ae bridge: vlan: move pvid inside net_bridge_vlan_group
One obvious way to converge more code (which was also used by the
previous vlan code) is to move pvid inside net_bridge_vlan_group. This
allows us to simplify some and remove other port-specific functions.
Also gives us the ability to simply pass the vlan group and use all of the
contained information.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01 18:24:04 -07:00
Nikolay Aleksandrov
468e794458 bridge: vlan: fix possible null vlgrp deref while registering new port
While a new port is being initialized the rx_handler gets set, but the
vlans get initialized later in br_add_if() and in that window if we
receive a frame with a link-local address we can try to dereference
p->vlgrp in:
br_handle_frame() -> br_handle_local_finish() -> br_should_learn()

Fix this by checking vlgrp before using it.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01 18:24:04 -07:00
Nikolay Aleksandrov
8af78b6487 bridge: vlan: adjust rhashtable initial size and hash locks size
As Stephen pointed out the default initial size is more than we need, so
let's start small (4 elements, thus nelem_hint = 3). Also limit the hash
locks to the number of CPUs as we don't need any write-side scaling and
this looks like the minimum.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01 18:24:03 -07:00
Eric W. Biederman
75aec9df3a bridge: Remove br_nf_push_frag_xmit_sk
Now that this compatability function no longer has any callers remove it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2015-09-30 01:45:04 -05:00
Eric W. Biederman
7d8c6e3915 ipv6: Pass struct net through ip6_fragment
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2015-09-30 01:45:03 -05:00
Eric W. Biederman
694869b3c5 ipv4: Pass struct net through ip_fragment
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2015-09-30 01:45:03 -05:00
David S. Miller
4bf1b54f9d 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 pull request contains Netfilter/IPVS updates for net-next
containing 90 patches from Eric Biederman.

The main goal of this batch is to avoid recurrent lookups for the netns
pointer, that happens over and over again in our Netfilter/IPVS code. The idea
consists of passing netns pointer from the hook state to the relevant functions
and objects where this may be needed.

You can find more information on the IPVS updates from Simon Horman's commit
merge message:

c3456026ad ("Merge tag 'ipvs2-for-v4.4' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs-next").

Exceptionally, this time, I'm not posting the patches again on netdev, Eric
already Cc'ed this mailing list in the original submission. If you need me to
make, just let me know.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-29 21:46:21 -07:00
Vivien Didelot
ab06900230 net: switchdev: abstract object in add/del ops
Similar to the notifier_call callback of a notifier_block, change the
function signature of switchdev add and del operations to:

    int switchdev_port_obj_add/del(struct net_device *dev,
                                   enum switchdev_obj_id id, void *obj);

This allows the caller to pass a specific switchdev_obj_* structure
instead of the generic switchdev_obj one.

Drivers implementation of these operations and switchdev have been
changed accordingly.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-29 21:31:59 -07:00
Nikolay Aleksandrov
2594e9064a bridge: vlan: add per-vlan struct and move to rhashtables
This patch changes the bridge vlan implementation to use rhashtables
instead of bitmaps. The main motivation behind this change is that we
need extensible per-vlan structures (both per-port and global) so more
advanced features can be introduced and the vlan support can be
extended. I've tried to break this up but the moment net_port_vlans is
changed and the whole API goes away, thus this is a larger patch.
A few short goals of this patch are:
- Extensible per-vlan structs stored in rhashtables and a sorted list
- Keep user-visible behaviour (compressed vlans etc)
- Keep fastpath ingress/egress logic the same (optimizations to come
  later)

Here's a brief list of some of the new features we'd like to introduce:
- per-vlan counters
- vlan ingress/egress mapping
- per-vlan igmp configuration
- vlan priorities
- avoid fdb entries replication (e.g. local fdb scaling issues)

The structure is kept single for both global and per-port entries so to
avoid code duplication where possible and also because we'll soon introduce
"port0 / aka bridge as port" which should simplify things further
(thanks to Vlad for the suggestion!).

Now we have per-vlan global rhashtable (bridge-wide) and per-vlan port
rhashtable, if an entry is added to a port it'll get a pointer to its
global context so it can be quickly accessed later. There's also a
sorted vlan list which is used for stable walks and some user-visible
behaviour such as the vlan ranges, also for error paths.
VLANs are stored in a "vlan group" which currently contains the
rhashtable, sorted vlan list and the number of "real" vlan entries.
A good side-effect of this change is that it resembles how hw keeps
per-vlan data.
One important note after this change is that if a VLAN is being looked up
in the bridge's rhashtable for filtering purposes (or to check if it's an
existing usable entry, not just a global context) then the new helper
br_vlan_should_use() needs to be used if the vlan is found. In case the
lookup is done only with a port's vlan group, then this check can be
skipped.

Things tested so far:
- basic vlan ingress/egress
- pvids
- untagged vlans
- undef CONFIG_BRIDGE_VLAN_FILTERING
- adding/deleting vlans in different scenarios (with/without global ctx,
  while transmitting traffic, in ranges etc)
- loading/removing the module while having/adding/deleting vlans
- extracting bridge vlan information (user ABI), compressed requests
- adding/deleting fdbs on vlans
- bridge mac change, promisc mode
- default pvid change
- kmemleak ON during the whole time

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-29 13:36:06 -07:00
Eric W. Biederman
c1444c6357 bridge: Pass net into br_validate_ipv4 and br_validate_ipv6
The network namespace is easiliy available in state->net so use it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-29 20:21:32 +02:00
Ian Wilson
34c2d9fb04 bridge: Allow forward delay to be cfgd when STP enabled
Allow bridge forward delay to be configured when Spanning Tree is enabled.

Signed-off-by: Ian Wilson <iwilson@brocade.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-27 19:09:38 -07:00
David S. Miller
4963ed48f2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	net/ipv4/arp.c

The net/ipv4/arp.c conflict was one commit adding a new
local variable while another commit was deleting one.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-26 16:08:27 -07:00
Siva Mannem
dcd45e0649 bridge: don't age externally added FDB entries
Signed-off-by: Siva Mannem <siva.mannem.lnx@gmail.com>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Premkumar Jonnala <pjonnala@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-23 14:35:58 -07:00
Scott Feldman
a79e88d9fb bridge: define some min/max/default ageing time constants
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-23 14:35:58 -07:00
Eric W. Biederman
06198b34a3 netfilter: Pass priv instead of nf_hook_ops to netfilter hooks
Only pass the void *priv parameter out of the nf_hook_ops.  That is
all any of the functions are interested now, and by limiting what is
passed it becomes simpler to change implementation details.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 22:00:16 +02:00
Eric W. Biederman
88182a0e0c netfilter: nf_tables: Use pkt->net instead of computing net from the passed net_devices
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 21:58:49 +02:00
Eric W. Biederman
686c9b5080 netfilter: x_tables: Use par->net instead of computing from the passed net devices
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 21:58:25 +02:00
Eric W. Biederman
156c196f60 netfilter: x_tables: Pass struct net in xt_action_param
As xt_action_param lives on the stack this does not bloat any
persistent data structures.

This is a first step in making netfilter code that needs to know
which network namespace it is executing in simpler.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 21:58:14 +02:00
Eric W. Biederman
6aa187f21c netfilter: nf_tables: kill nft_pktinfo.ops
- Add nft_pktinfo.pf to replace ops->pf
- Add nft_pktinfo.hook to replace ops->hooknum

This simplifies the code, makes it more readable, and likely reduces
cache line misses.  Maintainability is enhanced as the details of
nft_hook_ops are of no concern to the recpients of nft_pktinfo.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 21:58:01 +02:00
Eric W. Biederman
97b59c3a91 netfilter: ebtables: Simplify the arguments to ebt_do_table
Nearly everything thing of interest to ebt_do_table is already present
in nf_hook_state.  Simplify ebt_do_table by just passing in the skb,
nf_hook_state, and the table.  This make the code easier to read and
maintenance easier.

To support this create an nf_hook_state on the stack in ebt_broute
(the only caller without a nf_hook_state already available).  This new
nf_hook_state adds no new computations to ebt_broute, but does use a
few more bytes of stack.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-18 21:57:35 +02:00
Eric W. Biederman
0c4b51f005 netfilter: Pass net into okfn
This is immediately motivated by the bridge code that chains functions that
call into netfilter.  Without passing net into the okfns the bridge code would
need to guess about the best expression for the network namespace to process
packets in.

As net is frequently one of the first things computed in continuation functions
after netfilter has done it's job passing in the desired network namespace is in
many cases a code simplification.

To support this change the function dst_output_okfn is introduced to
simplify passing dst_output as an okfn.  For the moment dst_output_okfn
just silently drops the struct net.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:37 -07:00
Eric W. Biederman
9dff2c966a netfilter: Use nf_hook_state.net
Instead of saying "net = dev_net(state->in?state->in:state->out)"
just say "state->net".  As that information is now availabe,
much less confusing and much less error prone.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:37 -07:00
Eric W. Biederman
29a26a5680 netfilter: Pass struct net into the netfilter hooks
Pass a network namespace parameter into the netfilter hooks.  At the
call site of the netfilter hooks the path a packet is taking through
the network stack is well known which allows the network namespace to
be easily and reliabily.

This allows the replacement of magic code like
"dev_net(state->in?:state->out)" that appears at the start of most
netfilter hooks with "state->net".

In almost all cases the network namespace passed in is derived
from the first network device passed in, guaranteeing those
paths will not see any changes in practice.

The exceptions are:
xfrm/xfrm_output.c:xfrm_output_resume()         xs_net(skb_dst(skb)->xfrm)
ipvs/ip_vs_xmit.c:ip_vs_nat_send_or_cont()      ip_vs_conn_net(cp)
ipvs/ip_vs_xmit.c:ip_vs_send_or_cont()          ip_vs_conn_net(cp)
ipv4/raw.c:raw_send_hdrinc()                    sock_net(sk)
ipv6/ip6_output.c:ip6_xmit()			sock_net(sk)
ipv6/ndisc.c:ndisc_send_skb()                   dev_net(skb->dev) not dev_net(dst->dev)
ipv6/raw.c:raw6_send_hdrinc()                   sock_net(sk)
br_netfilter_hooks.c:br_nf_pre_routing_finish() dev_net(skb->dev) before skb->dev is set to nf_bridge->physindev

In all cases these exceptions seem to be a better expression for the
network namespace the packet is being processed in then the historic
"dev_net(in?in:out)".  I am documenting them in case something odd
pops up and someone starts trying to track down what happened.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:37 -07:00
Eric W. Biederman
04eb44890e bridge: Add br_netif_receive_skb remove netif_receive_skb_sk
netif_receive_skb_sk is only called once in the bridge code, replace
it with a bridge specific function that calls netif_receive_skb.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:37 -07:00
Eric W. Biederman
f2d74cf88c bridge: Cache net in br_nf_pre_routing_finish
This is prep work for passing net to the netfilter hooks.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:36 -07:00
Eric W. Biederman
6532948b2e bridge: Pass net into br_nf_push_frag_xmit
When struct net starts being passed through the ipv4 and ipv6 fragment
routines br_nf_push_frag_xmit will need to take a net parameter.
Prepare br_nf_push_frag_xmit before that is needed and introduce
br_nf_push_frag_xmit_sk for the call sites that still need the old
calling conventions.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:36 -07:00
Eric W. Biederman
8d4df0b930 bridge: Pass net into br_nf_ip_fragment
This is a prep work for passing struct net through ip_do_fragment and
later the netfilter okfn.   Doing this independently makes the later
code changes clearer.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:36 -07:00
Eric W. Biederman
1f19c578df bridge: Introduce br_send_bpdu_finish
The function dev_queue_xmit_skb_sk is unncessary and very confusing.
Introduce br_send_bpdu_finish to remove the need for dev_queue_xmit_skb_sk,
and have br_send_bpdu_finish call dev_queue_xmit.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-17 17:18:35 -07:00
Linus Lüssing
c2d4fbd216 bridge: fix igmpv3 / mldv2 report parsing
With the newly introduced helper functions the skb pulling is hidden in
the checksumming function - and undone before returning to the caller.

The IGMPv3 and MLDv2 report parsing functions in the bridge still
assumed that the skb is pointing to the beginning of the IGMP/MLD
message while it is now kept at the beginning of the IPv4/6 header,
breaking the message parsing and creating packet loss.

Fixing this by taking the offset between IP and IGMP/MLD header into
account, too.

Fixes: 9afd85c9e4 ("net: Export IGMP/MLD message validation code")
Reported-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Tested-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-11 15:08:20 -07:00
Vivien Didelot
7a577f013d net: bridge: remove unnecessary switchdev include
Remove the unnecessary switchdev.h include from br_netlink.c.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-08 22:33:14 -07:00
Vivien Didelot
bf361ad381 net: bridge: check __vlan_vid_del for error
Since __vlan_del can return an error code, change its inner function
__vlan_vid_del to return an eventual error from switchdev_port_obj_del.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-08 22:28:45 -07:00
David S. Miller
581a5f2a61 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

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

The following patchset contains Netfilter/IPVS updates for your net-next tree.
In sum, patches to address fallout from the previous round plus updates from
the IPVS folks via Simon Horman, they are:

1) Add a new scheduler to IPVS: The weighted overflow scheduling algorithm
   directs network connections to the server with the highest weight that is
   currently available and overflows to the next when active connections exceed
   the node's weight. From Raducu Deaconu.

2) Fix locking ordering in IPVS, always take rtnl_lock in first place. Patch
   from Julian Anastasov.

3) Allow to indicate the MTU to the IPVS in-kernel state sync daemon. From
   Julian Anastasov.

4) Enhance multicast configuration for the IPVS state sync daemon. Also from
   Julian.

5) Resolve sparse warnings in the nf_dup modules.

6) Fix a linking problem when CONFIG_NF_DUP_IPV6 is not set.

7) Add ICMP codes 5 and 6 to IPv6 REJECT target, they are more informative
   subsets of code 1. From Andreas Herz.

8) Revert the jumpstack size calculation from mark_source_chains due to chain
   depth miscalculations, from Florian Westphal.

9) Calm down more sparse warning around the Netfilter tree, again from Florian
   Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-28 16:29:59 -07:00
Florian Westphal
851345c5bb netfilter: reduce sparse warnings
bridge/netfilter/ebtables.c:290:26: warning: incorrect type in assignment (different modifiers)
-> remove __pure annotation.

ipv6/netfilter/ip6t_SYNPROXY.c:240:27: warning: cast from restricted __be16
-> switch ntohs to htons and vice versa.

netfilter/core.c:391:30: warning: symbol 'nfq_ct_nat_hook' was not declared. Should it be static?
-> delete it, got removed

net/netfilter/nf_synproxy_core.c:221:48: warning: cast to restricted __be32
-> Use __be32 instead of u32.

Tested with objdiff that these changes do not affect generated code.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-08-28 21:04:12 +02:00
Nikolay Aleksandrov
b22fbf22f8 bridge: fdb: rearrange net_bridge_fdb_entry
While looking into fixing the local entries scalability issue I noticed
that the structure is badly arranged because vlan_id would fall in a
second cache line while keeping rcu which is used only when deleting
in the first, so re-arrange the structure and push rcu to the end so we
can get 16 bytes which can be used for other fields (by pushing rcu
fully in the second 64 byte chunk). With this change all the core
necessary information when doing fdb lookups will be available in a
single cache line.

pahole before (note vlan_id):
struct net_bridge_fdb_entry {
	struct hlist_node          hlist;                /*     0    16 */
	struct net_bridge_port *   dst;                  /*    16     8 */
	struct callback_head       rcu;                  /*    24    16 */
	long unsigned int          updated;              /*    40     8 */
	long unsigned int          used;                 /*    48     8 */
	mac_addr                   addr;                 /*    56     6 */
	unsigned char              is_local:1;           /*    62: 7  1 */
	unsigned char              is_static:1;          /*    62: 6  1 */
	unsigned char              added_by_user:1;      /*    62: 5  1 */
	unsigned char              added_by_external_learn:1; /*    62: 4  1 */

	/* XXX 4 bits hole, try to pack */
	/* XXX 1 byte hole, try to pack */

	/* --- cacheline 1 boundary (64 bytes) --- */
	__u16                      vlan_id;              /*    64     2 */

	/* size: 72, cachelines: 2, members: 11 */
	/* sum members: 65, holes: 1, sum holes: 1 */
	/* bit holes: 1, sum bit holes: 4 bits */
	/* padding: 6 */
	/* last cacheline: 8 bytes */
}

pahole after (note vlan_id):
struct net_bridge_fdb_entry {
	struct hlist_node          hlist;                /*     0    16 */
	struct net_bridge_port *   dst;                  /*    16     8 */
	long unsigned int          updated;              /*    24     8 */
	long unsigned int          used;                 /*    32     8 */
	mac_addr                   addr;                 /*    40     6 */
	__u16                      vlan_id;              /*    46     2 */
	unsigned char              is_local:1;           /*    48: 7  1 */
	unsigned char              is_static:1;          /*    48: 6  1 */
	unsigned char              added_by_user:1;      /*    48: 5  1 */
	unsigned char              added_by_external_learn:1; /*    48: 4  1 */

	/* XXX 4 bits hole, try to pack */
	/* XXX 7 bytes hole, try to pack */

	struct callback_head       rcu;                  /*    56    16 */
	/* --- cacheline 1 boundary (64 bytes) was 8 bytes ago --- */

	/* size: 72, cachelines: 2, members: 11 */
	/* sum members: 65, holes: 1, sum holes: 7 */
	/* bit holes: 1, sum bit holes: 4 bits */
	/* last cacheline: 8 bytes */
}

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-27 16:38:52 -07:00
Toshiaki Makita
d2d427b392 bridge: Add netlink support for vlan_protocol attribute
This enables bridge vlan_protocol to be configured through netlink.

When CONFIG_BRIDGE_VLAN_FILTERING is disabled, kernel behaves the
same way as this feature is not implemented.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-27 15:35:33 -07:00
David S. Miller
dc25b25897 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/usb/qmi_wwan.c

Overlapping additions of new device IDs to qmi_wwan.c

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-21 11:44:04 -07:00