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2020-02-19bridge: br_stp: Use built-in RCU list checkingMadhuparna Bhowmik1-1/+2
list_for_each_entry_rcu() has built-in RCU and lock checking. Pass cond argument to list_for_each_entry_rcu() to silence false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled by default. Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-14net: bridge: add STP xstatsVivien Didelot1-0/+15
This adds rx_bpdu, tx_bpdu, rx_tcn, tx_tcn, transition_blk, transition_fwd xstats counters to the bridge ports copied over via netlink, providing useful information for STP. Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-5/+1
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>
2017-11-02net: bridge: add notifications for the bridge dev on vlan changeNikolay Aleksandrov1-3/+3
Currently the bridge device doesn't generate any notifications upon vlan modifications on itself because it doesn't use the generic bridge notifications. With the recent changes we know if anything was modified in the vlan config thus we can generate a notification when necessary for the bridge device so add support to br_ifinfo_notify() similar to how other combined functions are done - if port is present it takes precedence, otherwise notify about the bridge. I've explicitly marked the locations where the notification should be always for the port by setting bridge to NULL. I've also taken the liberty to rearrange each modified function's local variables in reverse xmas tree as well. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06bridge: move to workqueue gcNikolay Aleksandrov1-1/+1
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>
2016-12-10net: bridge: shorten ageing time on topology changeVivien Didelot1-0/+27
802.1D [1] specifies that the bridges must use a short value to age out dynamic entries in the Filtering Database for a period, once a topology change has been communicated by the root bridge. Add a bridge_ageing_time member in the net_bridge structure to store the bridge ageing time value configured by the user (ioctl/netlink/sysfs). If we are using in-kernel STP, shorten the ageing time value to twice the forward delay used by the topology when the topology change flag is set. When the flag is cleared, restore the configured ageing time. [1] "8.3.5 Notifying topology changes ", http://profesores.elo.utfsm.cl/~agv/elo309/doc/802.1D-1998.pdf Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-10net: bridge: add helper to set topology changeVivien Didelot1-2/+8
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>
2016-12-10net: bridge: add helper to offload ageing timeVivien Didelot1-8/+20
The SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME switchdev attr is actually set when initializing a bridge port, and when configuring the bridge ageing time from ioctl/netlink/sysfs. Add a __set_ageing_time helper to offload the ageing time to physical switches, and add the SWITCHDEV_F_DEFER flag since it can be called under bridge lock. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-25net: bridge: br_set_ageing_time takes a clock_tVivien Didelot1-1/+1
Change the ageing_time type in br_set_ageing_time() from u32 to what it is expected to be, i.e. a clock_t. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-30bridge: Allow set bridge ageing time when switchdev disabledHaishuang Yan1-1/+1
When NET_SWITCHDEV=n, switchdev_port_attr_set will return -EOPNOTSUPP, we should ignore this error code and continue to set the ageing time. Fixes: c62987bbd8a1 ("bridge: push bridge setting ageing_time down to switchdev") Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-11bridge: allow zero ageing timeStephen Hemminger1-3/+8
This fixes a regression in the bridge ageing time caused by: commit c62987bbd8a1 ("bridge: push bridge setting ageing_time down to switchdev") There are users of Linux bridge which use the feature that if ageing time is set to 0 it causes entries to never expire. See: https://www.linuxfoundation.org/collaborate/workgroups/networking/bridge For a pure software bridge, it is unnecessary for the code to have arbitrary restrictions on what values are allowable. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-18net: bridge: log port STP state on changeVivien Didelot1-10/+4
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>
2015-12-15switchdev: Pass original device to port netdev driverIdo Schimmel1-0/+2
switchdev drivers need to know the netdev on which the switchdev op was invoked. For example, the STP state of a VLAN interface configured on top of a port can change while being member in a bridge. In this case, the underlying driver should only change the STP state of that particular VLAN and not of all the VLANs configured on the port. However, current switchdev infrastructure only passes the port netdev down to the driver. Solve that by passing the original device down to the driver as part of the required switchdev object / attribute. This doesn't entail any change in current switchdev drivers. It simply enables those supporting stacked devices to know the originating device and act accordingly. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-16switchdev: bridge: Check return code is not EOPNOTSUPPIdo Schimmel1-1/+1
When NET_SWITCHDEV=n, switchdev_port_attr_set simply returns EOPNOTSUPP. In this case we should not emit errors and warnings to the kernel log. Reported-by: Sander Eikelenboom <linux@eikelenboom.it> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Fixes: 0bc05d585d38 ("switchdev: allow caller to explicitly request attr_set as deferred") Fixes: 6ac311ae8bfb ("Adding switchdev ageing notification on port bridged") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-10Revert "bridge: Allow forward delay to be cfgd when STP enabled"Vlad Yasevich1-4/+9
This reverts commit 34c2d9fb0498c066afbe610b15e18995fd8be792. 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>
2015-10-15switchdev: allow caller to explicitly request attr_set as deferredJiri Pirko1-1/+2
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>
2015-10-12bridge: push bridge setting ageing_time down to switchdevScott Feldman1-0/+23
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>
2015-10-03switchdev: rename SWITCHDEV_ATTR_* enum values to SWITCHDEV_ATTR_ID_*Jiri Pirko1-1/+1
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>
2015-09-27bridge: Allow forward delay to be cfgd when STP enabledIan Wilson1-9/+4
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>
2015-07-28bridge: stp: when using userspace stp stop kernel hello and hold timersNikolay Aleksandrov1-2/+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>
2015-06-24bridge: multicast: add a comment to br_port_state_selection about blocking stateNikolay Aleksandrov1-0/+4
Add a comment to explain why we're not disabling port's multicast when it goes in blocking state. Since there's a check in the timer's function which bypasses the timer if the port's in blocking/disabled state, the timer will simply expire and stop without sending more queries. Suggested-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-23bridge: multicast: start querier timer when running user-space stpNikolay Aleksandrov1-1/+2
When STP is running in user-space and querier is configured, the querier timer is not started when a port goes to a non-blocking state. This patch unifies the user- and kernel-space stp multicast port enable path and enables it in all states different from blocking. Note that when a port goes in BR_STATE_DISABLED it's not enabled because that is handled in the beginning of the port list loop. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-13switchdev: don't use anonymous union on switchdev attr/obj structsScott Feldman1-1/+1
Older gcc versions (e.g. gcc version 4.4.6) don't like anonymous unions which was causing build issues on the newly added switchdev attr/obj structs. Fix this by using named union on structs. Signed-off-by: Scott Feldman <sfeldma@gmail.com> Reported-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-12switchdev: convert STP update to switchdev attr setScott Feldman1-1/+5
STP update is just a settable port attribute, so convert switchdev_port_stp_update to an attr set. For DSA, the prepare phase is skipped and STP updates are only done in the commit phase. This is because currently the DSA drivers don't need to allocate any memory for STP updates and the STP update will not fail to HW (unless something horrible goes wrong on the MDIO bus, in which case the prepare phase wouldn't have been able to predict anyway). Signed-off-by: Scott Feldman <sfeldma@gmail.com> Acked-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-12switchdev: s/netdev_switch_/switchdev_/ and s/NETDEV_SWITCH_/SWITCHDEV_/Jiri Pirko1-1/+1
Turned out that "switchdev" sticks. So just unify all related terms to use this prefix. Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Scott Feldman <sfeldma@gmail.com> Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com> Acked-by: Andy Gospodarek <gospo@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-02bridge: call netdev_sw_port_stp_update when bridge port STP status changesScott Feldman1-0/+7
To notify switch driver of change in STP state of bridge port, add new .ndo op and provide switchdev wrapper func to call ndo op. Use it in bridge code then. Signed-off-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com> Acked-by: Thomas Graf <tgraf@suug.ch> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01net: bridge: add a br_set_state helper functionFlorian Fainelli1-5/+10
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>
2013-09-12bridge: Clamp forward_delay when enabling STPHerbert Xu1-6/+15
At some point limits were added to forward_delay. However, the limits are only enforced when STP is enabled. This created a scenario where you could have a value outside the allowed range while STP is disabled, which then stuck around even after STP is enabled. This patch fixes this by clamping the value when we enable STP. I had to move the locking around a bit to ensure that there is no window where someone could insert a value outside the range while we're in the middle of enabling STP. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Cheers, Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-12resubmit bridge: fix message_age_timer calculationChris Healy1-1/+1
This changes the message_age_timer calculation to use the BPDU's max age as opposed to the local bridge's max age. This is in accordance with section 8.6.2.3.2 Step 2 of the 802.1D-1998 sprecification. With the current implementation, when running with very large bridge diameters, convergance will not always occur even if a root bridge is configured to have a longer max age. Tested successfully on bridge diameters of ~200. Signed-off-by: Chris Healy <cphealy@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-30bridge: avoid OOPS if root port not foundstephen hemminger1-1/+8
Bridge can crash while trying to send topology change packet. This happens if root port can't be found. This was reported by user but currently unable to reproduce it easily. The STP conditions that cause this are not known yet, but the problem doesn't have to be fatal. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-14bridge: add root port blockingstephen hemminger1-1/+21
This is Linux bridge implementation of root port guard. If BPDU is received from a leaf (edge) port, it should not be elected as root port. Why would you want to do this? If using STP on a bridge and the downstream bridges are not fully trusted; this prevents a hostile guest for rerouting traffic. Why not just use netfilter? Netfilter does not track of follow spanning tree decisions. It would be difficult and error prone to try and mirror STP resolution in netfilter module. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-15net: cleanup unsigned to unsigned intEric Dumazet1-2/+2
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>
2012-03-08bridge: br_log_state() s/entering/entered/Paulius Zaleckas1-1/+1
When br_log_state() is reporting state it should say "entered" istead of "entering" since state at this point is already changed. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-04bridge: message age needs to increase, not decrease.Joakim Tjernlund1-1/+1
commit bridge: send proper message_age in config BPDU added this gem: bpdu.message_age = (jiffies - root->designated_age) p->designated_age = jiffies + bpdu->message_age; Notice how bpdu->message_age is negated when reassigned to bpdu.message_age. This causes message age to decrease breaking the STP protocol. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-04bridge: Adjust min age inc for HZ > 256Joakim Tjernlund1-2/+2
min age increment needs to round up its min age tick for all HZ values to guarantee message age is increasing. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-01bridge: master device stuck in no-carrier state forever when in user-stp modeVitalii Demianets1-15/+14
When in user-stp mode, bridge master do not follow state of its slaves, so after the following sequence of events it can stuck forever in no-carrier state: 1) turn stp off 2) put all slaves down - master device will follow their state and also go in no-carrier state 3) turn stp on with bridge-stp script returning 0 (go to the user-stp mode) Now bridge master won't follow slaves' state and will never reach running state. This patch solves the problem by making user-stp and kernel-stp behavior similar regarding master following slaves' states. Signed-off-by: Vitalii Demianets <vitas@nppfactor.kiev.ua> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22bridge: minor cleanupsstephen hemminger1-12/+11
Some minor cleanups that won't impact code: 1. Remove inline from non-critical functions; compiler will most likely inline them anyway. 2. Make function args const where possible. 3. Whitespace cleanup Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22bridge: add notification over netlink when STP changes statestephen hemminger1-1/+3
When STP changes state of interface need to send a new link message to reflect that change. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22bridge: send proper message_age in config BPDUstephen hemminger1-2/+2
A bridge topology with three systems: +------+ +------+ | A(2) |--| B(1) | +------+ +------+ \ / +------+ | C(3) | +------+ What is supposed to happen: * bridge with the lowest ID is elected root (for example: B) * C detects that A->C is higher cost path and puts in blocking state What happens. Bridge with lowest id (B) is elected correctly as root and things start out fine initially. But then config BPDU doesn't get transmitted from A -> C. Because of that the link from A-C is transistioned to the forwarding state. The root cause of this is that the configuration messages is generated with bogus message age, and dropped before sending. In the standardmessage_age is supposed to be: the time since the generation of the Configuration BPDU by the Root that instigated the generation of this Configuration BPDU. Reimplement this by recording the timestamp (age + jiffies) when recording config information. The old code incorrectly used the time elapsed on the ageing timer which was incorrect. See also: https://bugzilla.vyatta.com/show_bug.cgi?id=7164 Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-04bridge: range check STP parametersstephen hemminger1-0/+48
Apply restrictions on STP parameters based 802.1D 1998 standard. * Fixes missing locking in set path cost ioctl * Uses common code for both ioctl and sysfs This is based on an earlier patch Sasikanth V but with overhaul. Note: 1. It does NOT enforce the restriction on the relationship max_age and forward delay or hello time because in existing implementation these are set as independant operations. 2. If STP is disabled, there is no restriction on forward delay 3. No restriction on holding time because users use Linux code to act as hub or be sticky. 4. Although standard allow 0-255, Linux only allows 0-63 for port priority because more bits are reserved for port number. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-15Merge branch 'master' of ↵David S. Miller1-2/+2
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2011-03-14bridge: skip forwarding delay if not using STPstephen hemminger1-2/+2
If Spanning Tree Protocol is not enabled, there is no good reason for the bridge code to wait for the forwarding delay period before enabling the link. The purpose of the forwarding delay is to allow STP to learn about other bridges before nominating itself. The only possible impact is that when starting up a new port the bridge may flood a packet now, where previously it might have seen traffic from the other host and preseeded the forwarding table. Includes change for local variable br already available in that func. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-14bridge: control carrier based on ports onlinestephen hemminger1-13/+22
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>
2010-05-15bridge: change console message interfacestephen hemminger1-6/+5
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>
2010-02-28bridge: Add multicast start/stop hooksHerbert Xu1-0/+2
This patch hooks up the bridge start/stop and add/delete/disable port functions to the new multicast module. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-05net: mark read-only arrays as constJan Engelhardt1-1/+1
String literals are constant, and usually, we can also tag the array of pointers const too, moving it to the .rodata section. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-17bridge: fix initial packet flood if !STPStephen Hemminger1-0/+3
If bridge is configured with no STP and forwarding delay of 0 (which is typical for virtualization) then when link starts it will flood all packets for the first 20 seconds. This bug was introduced by a combination of earlier changes: * forwarding database uses hold time of zero to indicate user wants to always flood packets * optimzation of the case of forwarding delay of 0 avoids the initial timer tick The fix is to just skip all the topology change detection code if kernel STP is not being used. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-05bridge: Eliminate unnecessary forward delayStephen Hemminger1-7/+18
From: Stephen Hemminger <shemminger@vyatta.com> Based upon original patch by Herbert Xu, which contained the following problem description: -------------------- When the forward delay is set to zero, we still delay the setting of the forwarding state by one or possibly two timers depending on whether STP is enabled. This could either turn out to be instantaneous, or horribly slow depending on the load of the machine. As there is nothing preventing us from enabling forwarding straight away, this patch eliminates this potential delay by executing the code directly if the forward delay is zero. The effect of this problem is that immediately after the carrier comes on a port, the bridge will drop all packets received from that port until it enters forwarding mode, thus causing unnecessary packet loss. Note that this patch doesn't fully remove the delay due to the link watcher. We should also check the carrier state when we are about to drop an incoming packet because the port is disabled. But that's for another patch. -------------------- This version of the fix takes a different approach, in that it just does the state change directly. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-18Merge branch 'master' of ↵David S. Miller1-0/+1
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
2008-06-11net: 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>
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