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path: root/net/bridge/br_stp_timer.c
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2016-12-11net: bridge: add helper to set topology changeVivien Didelot1-1/+1
Add a __br_set_topology_change helper to set the topology change value. This can be later extended to add actions when the topology change flag is set or cleared. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-18net: bridge: log port STP state on changeVivien Didelot1-1/+0
Remove the shared br_log_state function and print the info directly in br_set_state, where the net_bridge_port state is actually changed. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Acked-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-29bridge: stp: when using userspace stp stop kernel hello and hold timersNikolay Aleksandrov1-1/+3
These should be handled only by the respective STP which is in control. They become problematic for devices with limited resources with many ports because the hold_timer is per port and fires each second and the hello timer fires each 2 seconds even though it's global. While in user-space STP mode these timers are completely unnecessary so it's better to keep them off. Also ensure that when the bridge is up these timers are started only when running with kernel STP. Signed-off-by: Satish Ashok <sashok@cumulusnetworks.com> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-22bridge: fix lockdep splatEric Dumazet1-0/+2
Following lockdep splat was reported : [ 29.382286] =============================== [ 29.382315] [ INFO: suspicious RCU usage. ] [ 29.382344] 4.1.0-0.rc0.git11.1.fc23.x86_64 #1 Not tainted [ 29.382380] ------------------------------- [ 29.382409] net/bridge/br_private.h:626 suspicious rcu_dereference_check() usage! [ 29.382455] other info that might help us debug this: [ 29.382507] rcu_scheduler_active = 1, debug_locks = 0 [ 29.382549] 2 locks held by swapper/0/0: [ 29.382576] #0: (((&p->forward_delay_timer))){+.-...}, at: [<ffffffff81139f75>] call_timer_fn+0x5/0x4f0 [ 29.382660] #1: (&(&br->lock)->rlock){+.-...}, at: [<ffffffffa0450dc1>] br_forward_delay_timer_expired+0x31/0x140 [bridge] [ 29.382754] stack backtrace: [ 29.382787] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.1.0-0.rc0.git11.1.fc23.x86_64 #1 [ 29.382838] Hardware name: LENOVO 422916G/LENOVO, BIOS A1KT53AUS 04/07/2015 [ 29.382882] 0000000000000000 3ebfc20364115825 ffff880666603c48 ffffffff81892d4b [ 29.382943] 0000000000000000 ffffffff81e124e0 ffff880666603c78 ffffffff8110bcd7 [ 29.383004] ffff8800785c9d00 ffff88065485ac58 ffff880c62002800 ffff880c5fc88ac0 [ 29.383065] Call Trace: [ 29.383084] <IRQ> [<ffffffff81892d4b>] dump_stack+0x4c/0x65 [ 29.383130] [<ffffffff8110bcd7>] lockdep_rcu_suspicious+0xe7/0x120 [ 29.383178] [<ffffffffa04520f9>] br_fill_ifinfo+0x4a9/0x6a0 [bridge] [ 29.383225] [<ffffffffa045266b>] br_ifinfo_notify+0x11b/0x4b0 [bridge] [ 29.383271] [<ffffffffa0450d90>] ? br_hold_timer_expired+0x70/0x70 [bridge] [ 29.383320] [<ffffffffa0450de8>] br_forward_delay_timer_expired+0x58/0x140 [bridge] [ 29.383371] [<ffffffffa0450d90>] ? br_hold_timer_expired+0x70/0x70 [bridge] [ 29.383416] [<ffffffff8113a033>] call_timer_fn+0xc3/0x4f0 [ 29.383454] [<ffffffff81139f75>] ? call_timer_fn+0x5/0x4f0 [ 29.383493] [<ffffffff8110a90f>] ? lock_release_holdtime.part.29+0xf/0x200 [ 29.383541] [<ffffffffa0450d90>] ? br_hold_timer_expired+0x70/0x70 [bridge] [ 29.383587] [<ffffffff8113a6a4>] run_timer_softirq+0x244/0x490 [ 29.383629] [<ffffffff810b68cc>] __do_softirq+0xec/0x670 [ 29.383666] [<ffffffff810b70d5>] irq_exit+0x145/0x150 [ 29.383703] [<ffffffff8189f506>] smp_apic_timer_interrupt+0x46/0x60 [ 29.383744] [<ffffffff8189d523>] apic_timer_interrupt+0x73/0x80 [ 29.383782] <EOI> [<ffffffff816f131f>] ? cpuidle_enter_state+0x5f/0x2f0 [ 29.383832] [<ffffffff816f131b>] ? cpuidle_enter_state+0x5b/0x2f0 Problem here is that br_forward_delay_timer_expired() is a timer handler, calling br_ifinfo_notify() which assumes either rcu_read_lock() or RTNL are held. Simplest fix seems to add rcu read lock section. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Josh Boyer <jwboyer@fedoraproject.org> Reported-by: Dominick Grift <dac.override@gmail.com> Cc: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-02net: bridge: add a br_set_state helper functionFlorian Fainelli1-2/+2
In preparation for being able to propagate port states to e.g: notifiers or other kernel parts, do not manipulate the port state directly, but instead use a helper function which will allow us to do a bit more than just setting the state. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-20bridge: add space before '(/{', after ',', etc.tanxiaojun1-1/+1
Spaces required before the open parenthesis '(', before the open brace '{', after that ',' and around that '?/:'. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-04bridge: fix race with topology change timerstephen hemminger1-1/+1
A bridge should only send topology change notice if it is not the root bridge. It is possible for message age timer to elect itself as a new root bridge, and still have a topology change timer running but waiting for bridge lock on other CPU. Solve the race by checking if we are root bridge before continuing. This was the root cause of the cases where br_send_tcn_bpdu would OOPS. Reported-by: JerryKang <jerry.kang@samsung.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-10time: jiffies_delta_to_clock_t() helper to the rescueEric Dumazet1-1/+1
Various /proc/net files sometimes report crazy timer values, expressed in clock_t units. This happens when an expired timer delta (expires - jiffies) is passed to jiffies_to_clock_t(). This function has an overflow in : return div_u64((u64)x * TICK_NSEC, NSEC_PER_SEC / USER_HZ); commit cbbc719fccdb8cb (time: Change jiffies_to_clock_t() argument type to unsigned long) only got around the problem. As we cant output negative values in /proc/net/tcp without breaking various tools, I suggest adding a jiffies_delta_to_clock_t() wrapper that caps the negative delta to a 0 value. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Maciej Żenczykowski <maze@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: hank <pyu@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-15net: cleanup unsigned to unsigned intEric Dumazet1-3/+3
Use of "unsigned int" is preferred to bare "unsigned" in net tree. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-23bridge: add notification over netlink when STP changes statestephen hemminger1-0/+1
When STP changes state of interface need to send a new link message to reflect that change. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-15bridge: control carrier based on ports onlinestephen hemminger1-0/+1
This makes the bridge device behave like a physical device. In earlier releases the bridge always asserted carrier. This changes the behavior so that bridge device carrier is on only if one or more ports are in the forwarding state. This should help IPv6 autoconfiguration, DHCP, and routing daemons. I did brief testing with Network and Virt manager and they seem fine, but since this changes behavior of bridge, it should wait until net-next (2.6.39). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr> Tested-By: Adam Majer <adamm@zombino.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-16bridge: change console message interfacestephen hemminger1-14/+10
Use one set of macro's for all bridge messages. Note: can't use netdev_XXX macro's because bridge is purely virtual and has no device parent. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-12net: remove CVS keywordsAdrian Bunk1-2/+0
This patch removes CVS keywords that weren't updated for a long time from comments. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-05-31[BRIDGE]: Round off STP perodic timers.Stephen Hemminger1-1/+1
Peroidic STP timers don't have to be exact. The hold timer runs at 1HZ, and the hello timer normally runs at 2HZ; save power by aligning it them to next second. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-05-08header cleaning: don't include smp_lock.h when not usedRandy Dunlap1-1/+0
Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11[NET] BRIDGE: Fix whitespace errors.YOSHIFUJI Hideaki1-10/+10
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21[BRIDGE]: use setup_timerStephen Hemminger1-16/+7
Use the now standard setup_timer function. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21[BRIDGE]: remove unneeded bh disablesStephen Hemminger1-12/+12
The STP timers run off softirq (kernel timers), so there is no need to disable bottom half in the spin locks. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-04-17Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+188
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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