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* bridge: Convert compare_ether_addr to ether_addr_equalJoe Perches2012-05-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modulesPaul Gortmaker2011-10-311-0/+1
| | | | | | | | | These files are non modular, but need to export symbols using the macros now living in export.h -- call out the include so that things won't break when we remove the implicit presence of module.h from everywhere. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* bridge: allow forwarding some link local framesstephen hemminger2011-10-061-5/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is based on an earlier patch by Nick Carter with comments by David Lamparter but with some refinements. Thanks for their patience this is a confusing area with overlap of standards, user requirements, and compatibility with earlier releases. It adds a new sysfs attribute /sys/class/net/brX/bridge/group_fwd_mask that controls forwarding of frames with address of: 01-80-C2-00-00-0X The default setting has no forwarding to retain compatibility. One change from earlier releases is that forwarding of group addresses is not dependent on STP being enabled or disabled. This choice was made based on interpretation of tie 802.1 standards. I expect complaints will arise because of this, but better to follow the standard than continue acting incorrectly by default. The filtering mask is writeable, but only values that don't forward known control frames are allowed. It intentionally blocks attempts to filter control protocols. For example: writing a 8 allows forwarding 802.1X PAE addresses which is the most common request. Reported-by: David Lamparter <equinox@diac24.net> Original-patch-by: Nick Carter <ncarter100@gmail.com> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Tested-by: Benjamin Poirier <benjamin.poirier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Always flood broadcast packetsHerbert Xu2011-07-051-2/+4
| | | | | | | | | | | | | As is_multicast_ether_addr returns true on broadcast packets as well, we need to explicitly exclude broadcast packets so that they're always flooded. This wasn't an issue before as broadcast packets were considered to be an unregistered multicast group, which were always flooded. However, as we now only flood such packets to router ports, this is no longer acceptable. Reported-by: Michael Guntsche <mike@it-loops.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2011-04-261-1/+1
|\ | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Resolved logic conflicts causing a build failure due to drivers/net/r8169.c changes using a patch from Stephen Rothwell. Signed-off-by: David S. Miller <davem@davemloft.net>
| * Revert "bridge: Forward reserved group addresses if !STP"David S. Miller2011-04-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 1e253c3b8a1aeed51eef6fc366812f219b97de65. It breaks 802.3ad bonding inside of a bridge. The commit was meant to support transport bridging, and specifically virtual machines bridged to an ethernet interface connected to a switch port wiht 802.1x enabled. But this isn't the way to do it, it breaks too many other things. Signed-off-by: David S. Miller <davem@davemloft.net>
* | bridge: track last used time in forwarding tablestephen hemminger2011-04-041-2/+3
|/ | | | | | | | Adds tracking the last used time in forwarding table. Rename ageing_timer to updated to better describe it. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: introduce rx_handler results and logic around thatJiri Pirko2011-03-161-10/+15
| | | | | | | | | | | This patch allows rx_handlers to better signalize what to do next to it's caller. That makes skb->deliver_no_wcard no longer needed. kernel-doc for rx_handler_result is taken from Nicolas' patch. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Replace mp->mglist hlist with a boolHerbert Xu2011-02-121-1/+1
| | | | | | | | | | | | | | As it turns out we never need to walk through the list of multicast groups subscribed by the bridge interface itself (the only time we'd want to do that is when we shut down the bridge, in which case we simply walk through all multicast groups), we don't really need to keep an hlist for mp->mglist. This means that we can replace it with just a single bit to indicate whether the bridge interface is subscribed to a group. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: add proper RCU annotation to should_route_hookEric Dumazet2010-11-151-3/+7
| | | | | | | | | | | Add br_should_route_hook_t typedef, this is the only way we can get a clean RCU implementation for function pointer. Move route_hook to location where it is used. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Forward reserved group addresses if !STPBenjamin Poirier2010-10-211-1/+1
| | | | | | | | | | Make all frames sent to reserved group MAC addresses (01:80:c2:00:00:00 to 01:80:c2:00:00:0f) be forwarded if STP is disabled. This enables forwarding EAPOL frames, among other things. Signed-off-by: Benjamin Poirier <benjamin.poirier@polymtl.ca> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: is PACKET_LOOPBACK unlikely()?Simon Horman2010-08-221-1/+1
| | | | | | | | | | While looking at using netdev_rx_handler_register for openvswitch Jesse Gross suggested that an unlikely() might be worthwhile in that code. I'm interested to see if its appropriate for the bridge code. Cc: Jesse Gross <jesse@nicira.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2010-08-021-4/+3
|\ | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/e1000e/hw.h net/bridge/br_device.c net/bridge/br_input.c
| * bridge: add rcu_read_lock on transmitstephen hemminger2010-07-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | Long ago, when bridge was converted to RCU, rcu lock was equivalent to having preempt disabled. RCU has changed a lot since then and bridge code was still assuming the since transmit was called with bottom half disabled, it was RCU safe. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Tested-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bridge: 64bit rx/tx countersEric Dumazet2010-06-231-0/+2
| | | | | | | | | | | | | | | | | | | | | | Use u64_stats_sync infrastructure to provide 64bit rx/tx counters even on 32bit hosts. It is safe to use a single u64_stats_sync for rx and tx, because BH is disabled on both, and we use per_cpu data. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bridge: use rx_handler_data pointer to store net_bridge_port pointerJiri Pirko2010-06-151-5/+4
| | | | | | | | | | | | | | | | | | | | Register net_bridge_port pointer as rx_handler data pointer. As br_port is removed from struct net_device, another netdev priv_flag is added to indicate the device serves as a bridge port. Also rcuized pointers are now correctly dereferenced in br_fdb.c and in netfilter parts. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: replace hooks in __netif_receive_skb V5Jiri Pirko2010-06-021-3/+9
|/ | | | | | | | | | | | | | What this patch does is it removes two receive frame hooks (for bridge and for macvlan) from __netif_receive_skb. These are replaced them with a single hook for both. It only supports one hook per device because it makes no sense to do bridging and macvlan on the same device. Then a network driver (of virtual netdev like macvlan or bridge) can register an rx_handler for needed net device. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of /repos/git/net-next-2.6Patrick McHardy2010-04-201-0/+1
|\ | | | | | | | | | | | | | | | | Conflicts: Documentation/feature-removal-schedule.txt net/ipv6/netfilter/ip6t_REJECT.c net/netfilter/xt_limit.c Signed-off-by: Patrick McHardy <kaber@trash.net>
| * Merge branch 'master' of ↵David S. Miller2010-04-111-0/+1
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/stmmac/stmmac_main.c drivers/net/wireless/wl12xx/wl1271_cmd.c drivers/net/wireless/wl12xx/wl1271_main.c drivers/net/wireless/wl12xx/wl1271_spi.c net/core/ethtool.c net/mac80211/scan.c
| | * include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* | | netfilter: bridge: use NFPROTO values for NF_HOOK invocationJan Engelhardt2010-03-251-3/+3
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The first argument to NF_HOOK* is an nfproto since quite some time. Commit v2.6.27-2457-gfdc9314 was the first to practically start using the new names. Do that now for the remaining NF_HOOK calls. The semantic patch used was: // <smpl> @@ @@ (NF_HOOK |NF_HOOK_THRESH )( -PF_BRIDGE, +NFPROTO_BRIDGE, ...) @@ @@ NF_HOOK( -PF_INET6, +NFPROTO_IPV6, ...) @@ @@ NF_HOOK( -PF_INET, +NFPROTO_IPV4, ...) // </smpl> Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
* | bridge: per-cpu packet statistics (v3)stephen hemminger2010-03-161-2/+4
|/ | | | | | | | | | The shared packet statistics are a potential source of slow down on bridged traffic. Convert to per-cpu array, but only keep those statistics which change per-packet. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge br_multicast: Don't refer to BR_INPUT_SKB_CB(skb)->mrouters_only ↵YOSHIFUJI Hideaki / 吉藤英明2010-03-161-1/+1
| | | | | | | | | | | | | | | | | without IGMP snooping. Without CONFIG_BRIDGE_IGMP_SNOOPING, BR_INPUT_SKB_CB(skb)->mrouters_only is not appropriately initialized, so we can see garbage. A clear option to fix this is to set it even without that config, but we cannot optimize out the branch. Let's introduce a macro that returns value of mrouters_only and let it return 0 without CONFIG_BRIDGE_IGMP_SNOOPING. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Fix br_forward crash in promiscuous modeMichael Braun2010-03-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | From: Michael Braun <michael-dev@fami-braun.de> bridge: Fix br_forward crash in promiscuous mode It's a linux-next kernel from 2010-03-12 on an x86 system and it OOPs in the bridge module in br_pass_frame_up (called by br_handle_frame_finish) because brdev cannot be dereferenced (its set to a non-null value). Adding some BUG_ON statements revealed that BR_INPUT_SKB_CB(skb)->brdev == br-dev (as set in br_handle_frame_finish first) only holds until br_forward is called. The next call to br_pass_frame_up then fails. Digging deeper it seems that br_forward either frees the skb or passes it to NF_HOOK which will in turn take care of freeing the skb. The same is holds for br_pass_frame_ip. So it seems as if two independent skb allocations are required. As far as I can see, commit b33084be192ee1e347d98bb5c9e38a53d98d35e2 ("bridge: Avoid unnecessary clone on forward path") removed skb duplication and so likely causes this crash. This crash does not happen on 2.6.33. I've therefore modified br_forward the same way br_flood has been modified so that the skb is not freed if skb0 is going to be used and I can confirm that the attached patch resolves the issue for me. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Add multicast data-path hooksHerbert Xu2010-02-281-1/+17
| | | | | | | | | This patch finally hooks up the multicast snooping module to the data path. In particular, all multicast packets passing through the bridge are fed into the module and switched by it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Avoid unnecessary clone on forward pathHerbert Xu2010-02-281-4/+1
| | | | | | | | | | | When the packet is delivered to the local bridge device we may end up cloning it unnecessarily if no bridge port can receive the packet in br_flood. This patch avoids this by moving the skb_clone into br_flood. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Allow tail-call on br_pass_frame_upHerbert Xu2010-02-281-5/+7
| | | | | | | | | This patch allows tail-call on the call to br_pass_frame_up in br_handle_frame_finish. This is now possible because of the previous patch to call br_pass_frame_up last. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: Do br_pass_frame_up after other portsHerbert Xu2010-02-281-3/+3
| | | | | | | | | | | | | | At the moment we deliver to the local bridge port via the function br_pass_frame_up before all other ports. There is no requirement for this. For the purpose of IGMP snooping, it would be more convenient if we did the local port last. Therefore this patch rearranges the bridge input processing so that the local bridge port gets to see the packet last (if at all). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: relay bridge multicast pkgs if !STPStephen Hemminger2009-05-171-0/+5
| | | | | | | | | | | | | | | | Currently the bridge catches all STP packets; even if STP is turned off. This prevents other systems (which do have STP turned on) from being able to detect loops in the network. With this patch, if STP is off, then any packet sent to the STP multicast group address is forwarded to all ports. Based on earlier patch by Joakim Tjernlund with changes to go through forwarding (not local chain), and optimization that only last octet needs to be checked. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: handle process all link-local framesStephen Hemminger2008-06-171-8/+5
| | | | | | | | | | Any frame addressed to link-local addresses should be processed by local receive path. The earlier code would process them only if STP was enabled. Since there are other frames like LACP for bonding, we should always process them. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: remove CVS keywordsAdrian Bunk2008-06-111-2/+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>
* bridge: Use on-device stats instead of private ones.Pavel Emelyanov2008-05-211-5/+5
| | | | | | | | | | Even though bridges require 6 fields from struct net_device_stats, the on-device stats are always there, so we may just use them. The br_dev_get_stats is no longer required after this. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Use cpu_to_be16() where appropriate.YOSHIFUJI Hideaki2008-01-281-1/+1
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Properly dereference the br_should_route_hookPavel Emelyanov2007-11-291-3/+4
| | | | | | | | | | | | | | | | This hook is protected with the RCU, so simple if (br_should_route_hook) br_should_route_hook(...) is not enough on some architectures. Use the rcu_dereference/rcu_assign_pointer in this case. Fixed Stephen's comment concerning using the typeof(). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [NETFILTER]: Replace sk_buff ** with sk_buff *Herbert Xu2007-10-151-1/+1
| | | | | | | | | With all the users of the double pointers removed, this patch mops up by finally replacing all occurances of sk_buff ** in the netfilter API by sk_buff *. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Unshare skb upon entryHerbert Xu2007-10-151-0/+4
| | | | | | | | | | Due to the special location of the bridging hook, it should never see a shared packet anyway (certainly not with any in-kernel code). So it makes sense to unshare the skb there if necessary as that will greatly simplify the code below it (in particular, netfilter). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Kill clone argument to br_flood_*Herbert Xu2007-09-161-26/+22
| | | | | | | | | The clone argument is only used by one caller and that caller can clone the packet itself. This patch moves the clone call into the caller and kills the clone argument. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Packets leaking out of disabled/blocked ports.Stephen Hemminger2007-08-301-2/+1
| | | | | | | | | | | | | | This patch fixes some packet leakage in bridge. The bridging code was allowing forward table entries to be generated even if a device was being blocked. The fix is to not add forwarding database entries unless the port is active. The bug arose as part of the conversion to processing STP frames through normal receive path (in 2.6.17). Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Acked-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/* misc endianness annotationsAl Viro2007-07-261-3/+3
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [BRIDGE]: if no STP then forward all BPDUsStephen Hemminger2007-04-251-2/+8
| | | | | | | | | | | | If a bridge is not running STP, then it has no way to detect a cycle in the network. But if it is not running STP and some other machine or device is running STP, then if STP BPDU's get forwarded to it can detect the cycle. This is how the old 2.4 and early 2.6 code worked. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: drop PAUSE framesStephen Hemminger2007-04-251-1/+6
| | | | | | | | | Pause frames should never make it out of the network device into the stack. But if a device was misconfigured, it might happen. So drop pause frames in bridge. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: don't change packet typeStephen Hemminger2007-04-251-4/+1
| | | | | | | | | | The change to forward STP bpdu's (for usermode STP) through normal path, changed the packet type in the process. Since link local stuff is multicast, it should stay pkt_type = PACKET_MULTICAST. The code was probably copy/pasted incorrectly from the bridge pseudo-device receive path. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: don't route packets while learningStephen Hemminger2007-04-251-7/+10
| | | | | | | | | While in the STP learning state, don't route packets; wait until forwarding delay has expired. The purpose of the forwarding delay is to detect loops in the network, and if a brouter started up and started forwarding, it could cause a flood. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
* bridge: eliminate call by referenceStephen Hemminger2007-04-251-11/+9
| | | | | | | | Change the bridging hook to be simple function with return value rather than modifying the skb argument. This could generate better code and is cleaner. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
* [BRIDGE]: faster compare for link local addressesStephen Hemminger2007-04-251-1/+5
| | | | | | | | Use logic operations rather than memcmp() to compare destination address with link local multicast addresses. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] BRIDGE: Fix whitespace errors.YOSHIFUJI Hideaki2007-02-101-2/+2
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: keep track of received multicast packetsStephen Hemminger2006-05-051-0/+1
| | | | | | | | It makes sense to add this simple statistic to keep track of received multicast packets. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: receive link-local on disabled ports.Stephen Hemminger2006-04-111-3/+0
| | | | | | | | | | This change allows link local packets (like 802.3ad and Spanning Tree Protocol) to be processed even when the bridge is not using the port. It fixes the chicken-egg problem for bridging a bonded device, and may also fix problems with spanning tree failover. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: Remove duplicate const from is_link_local() argument type.Andrew Morton2006-03-201-1/+1
| | | | | Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BRIDGE]: allow show/store of group multicast addressStephen Hemminger2006-03-201-3/+4
| | | | | | | | | | | | | | Bridge's communicate with each other using Spanning Tree Protocol over a standard multicast address. There are times when testing or layering bridges over existing topologies or tunnels, when it is useful to use alternative multicast addresses for STP packets. The 802.1d standard has some unused addresses, that can be used for this. This patch is restrictive in that it only allows one of the possible addresses in the standard. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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