Commit graph

86 commits

Author SHA1 Message Date
Jayachandran C
7ad4d2f690 [BRIDGE] ebtables: fix allocation in net/bridge/netfilter/ebtables.c
Allocate an array of 'struct ebt_chainstack *', the current code allocates
array of 'struct ebt_chainstack'.

akpm: converted to use the

	foo = alloc(sizeof(*foo))

form.  Which would have prevented this from happening in the first place.

akpm: also removed unneeded typecast.

akpm: what on earth is this code doing anyway?  cpu_possible_map can be
sparse..

Signed-off-by: Jayachandran C. <c.jayachandran@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-11 17:25:38 -07:00
Stephen Hemminger
b7595b4955 [BRIDGE]: receive link-local on disabled ports.
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>
2006-04-11 17:21:05 -07:00
KAMEZAWA Hiroyuki
6f91204225 [PATCH] for_each_possible_cpu: network codes
for_each_cpu() actually iterates across all possible CPUs.  We've had mistakes
in the past where people were using for_each_cpu() where they should have been
iterating across only online or present CPUs.  This is inefficient and
possibly buggy.

We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the
future.

This patch replaces for_each_cpu with for_each_possible_cpu under /net

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11 06:18:31 -07:00
Patrick McHardy
2e2f7aefa8 [NETFILTER]: Fix fragmentation issues with bridge netfilter
The conntrack code doesn't do re-fragmentation of defragmented packets
anymore but relies on fragmentation in the IP layer. Purely bridged
packets don't pass through the IP layer, so the bridge netfilter code
needs to take care of fragmentation itself.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-09 22:25:23 -07:00
Andrew Morton
65b4b4e81a [NETFILTER]: Rename init functions.
Every netfilter module uses `init' for its module_init() function and
`fini' or `cleanup' for its module_exit() function.

Problem is, this creates uninformative initcall_debug output and makes
ctags rather useless.

So go through and rename them all to $(filename)_init and
$(filename)_fini.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-28 17:02:48 -08:00
Peter Chubb
4dc6d9cc38 [BRIDGE]: Unaligned accesses in the ethernet bridge
I see lots of
	kernel unaligned access to 0xa0000001009dbb6f, ip=0xa000000100811591
	kernel unaligned access to 0xa0000001009dbb6b, ip=0xa0000001008115c1
	kernel unaligned access to 0xa0000001009dbb6d, ip=0xa0000001008115f1
messages in my logs on IA64 when using the ethernet bridge with 2.6.16.

Appended is a patch to fix them.

Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-24 15:44:57 -08:00
Andrew Morton
b3e83d6d18 [BRIDGE]: Remove duplicate const from is_link_local() argument type.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 23:00:56 -08:00
Stephen Hemminger
12ac84c4a9 [BRIDGE]: use LLC to send STP
The bridge code can use existing LLC output code when building
spanning tree protocol packets.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:59:49 -08:00
Stephen Hemminger
fda93d92d7 [BRIDGE]: allow show/store of group multicast address
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>
2006-03-20 22:59:21 -08:00
Stephen Hemminger
cf0f02d04a [BRIDGE]: use llc for receiving STP packets
Use LLC for the receive path of Spanning Tree Protocol packets.
This allows link local multicast packets to be received by
other protocols (if they care), and uses the existing LLC
code to get STP packets back into bridge code.

The bridge multicast address is also checked, so bridges using
other link local multicast addresses are ignored. This allows
for use of different multicast addresses to define separate STP
domains.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:59:06 -08:00
Stephen Hemminger
18fdb2b25b [BRIDGE]: stp timer to jiffies cleanup
Cleanup the get/set of bridge timer value in the packets.
It is clearer not to bury the conversion in macro.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:58:49 -08:00
Stephen Hemminger
f8ae737dee [BRIDGE]: forwarding remove unneeded preempt and bh diasables
Optimize the forwarding and transmit paths. Both places are
called with bottom half/no preempt so there is no need to use
spin_lock_bh or rcu_read_lock.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:58:36 -08:00
Stephen Hemminger
fdeabdefb2 [BRIDGE]: netfilter inline cleanup
Move nf_bridge_alloc from header file to the one place it is
used and optimize it.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:58:21 -08:00
Stephen Hemminger
8b42ec3926 [BRIDGE]: netfilter VLAN macro cleanup
Fix the VLAN macros in bridge netfilter code. Macros should
not depend on magic variables.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:58:05 -08:00
Stephen Hemminger
f8a2602861 [BRIDGE]: netfilter dont use __constant_htons
Only use__constant_htons() for initializers and switch cases.
For other uses, it is just as efficient and clearer to use htons

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:57:46 -08:00
Stephen Hemminger
789bc3e5b6 [BRIDGE]: netfilter whitespace
Run br_netfilter through Lindent to fix whitespace.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:57:32 -08:00
Stephen Hemminger
d5513a7d32 [BRIDGE]: optimize frame pass up
The netfilter hook that is used to receive frames doesn't need to be a
stub.  It is only called in two ways, both of which ignore the return
value.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:57:18 -08:00
Stephen Hemminger
cee4854122 [BRIDGE]: use kzalloc
Use kzalloc versus kmalloc+memset. Also don't need to do
memset() of bridge address since it is in netdev private data
that is already zero'd in alloc_netdev.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:57:03 -08:00
Stephen Hemminger
3b781fa10b [BRIDGE]: use kcalloc
Use kcalloc rather than kmalloc + memset.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:56:50 -08:00
Stephen Hemminger
a95fcacdc3 [BRIDGE]: use setup_timer
Use the now standard setup_timer function.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:56:38 -08:00
Stephen Hemminger
e3efe08e9a [BRIDGE]: remove unneeded bh disables
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>
2006-03-20 22:56:25 -08:00
Andrew Morton
9ebddc1aa3 [BRIDGE] br_netfilter: Warning fixes.
net/bridge/br_netfilter.c: In function `br_nf_pre_routing':
net/bridge/br_netfilter.c:427: warning: unused variable `vhdr'
net/bridge/br_netfilter.c:445: warning: unused variable `vhdr'

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:55:24 -08:00
Andrew Morton
74ca4e5acd [BRIDGE] ebtables: Build fix.
net/bridge/netfilter/ebtables.c:1481: warning: initialization makes pointer from integer without a cast

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:55:02 -08:00
Herbert Xu
cbb042f9e1 [NET]: Replace skb_pull/skb_postpull_rcsum with skb_pull_rcsum
We're now starting to have quite a number of places that do skb_pull
followed immediately by an skb_postpull_rcsum.  We can merge these two
operations into one function with skb_pull_rcsum.  This makes sense
since most pull operations on receive skb's need to update the
checksum.

I've decided to make this out-of-line since it is fairly big and the
fast path where hardware checksums are enabled need to call
csum_partial anyway.

Since this is a brand new function we get to add an extra check on the
len argument.  As it is most callers of skb_pull ignore its return
value which essentially means that there is no check on the len
argument.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:43:56 -08:00
Ingo Molnar
57b47a53ec [NET]: sem2mutex part 2
Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:35:41 -08:00
Gregor Maier
c127437641 [NETFILTER]: Fix wrong option spelling in Makefile for CONFIG_BRIDGE_EBT_ULOG
Signed-off-by: Gregor Maier <gregor@net.in.tum.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-11 18:51:25 -08:00
Stephen Hemminger
125a12ccf3 [BRIDGE]: generate kobject remove event
The earlier round of kobject/sysfs changes to bridge caused
it not to generate a uevent on removal. Don't think any application
cares (not sure about Xen) but since it generates add uevent
it should generate remove as well.

Signed-off-by: Stephen Hemminger <shemmigner@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-04 21:06:23 -08:00
Stephen Hemminger
d32439c0d4 [BRIDGE]: port timer initialization
Initialize the STP timers for a port when it is created,
rather than when it is enabled. This will prevent future race conditions
where timer gets started before port is enabled.

Signed-off-by: Stephen Hemminger <shemmigner@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-04 21:06:21 -08:00
Stephen Hemminger
6e86b89084 [BRIDGE]: fix crash in STP
Bridge would crash because of uninitailized timer if STP is used and
device was inserted into a bridge before bridge was up. This got
introduced when the delayed port checking was added.  Fix is to not
enable STP on port unless bridge is up.

Bugzilla: http://bugzilla.kernel.org/show_bug.cgi?id=6140
Dup:      http://bugzilla.kernel.org/show_bug.cgi?id=6156

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-04 21:06:19 -08:00
Patrick McHardy
bafac2a512 [NETFILTER]: Restore {ipt,ip6t,ebt}_LOG compatibility
The nfnetlink_log infrastructure changes broke compatiblity of the LOG
targets. They currently use whatever log backend was registered first,
which means that if ipt_ULOG was loaded first, no messages will be printed
to the ring buffer anymore.

Restore compatiblity by using the old log functions by default and only use
the nf_log backend if the user explicitly said so.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-27 13:04:17 -08:00
Patrick McHardy
42cf93cd46 [NETFILTER]: Fix bridge netfilter related in xfrm_lookup
The bridge-netfilter code attaches a fake dst_entry with dst->ops == NULL
to purely bridged packets. When these packets are SNATed and a policy
lookup is done, xfrm_lookup crashes because it tries to dereference
dst->ops.

Change xfrm_lookup not to dereference dst->ops before checking for the
DST_NOXFRM flag and set this flag in the fake dst_entry.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-23 16:10:51 -08:00
Adrian Drzewiecki
78872ccb68 [BRIDGE]: Fix deadlock in br_stp_disable_bridge
Looks like somebody forgot to use the _bh spin_lock variant. We ran into a 
deadlock where br->hello_timer expired while br_stp_disable_br() walked 
br->port_list. 

Signed-off-by: Adrian Drzewiecki <z@drze.net>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-15 01:47:48 -08:00
Stephen Hemminger
178a3259f2 [BRIDGE]: Better fix for netfilter missing symbol has_bridge_parent
Horms patch was the best of the three fixes. Dave, already applied
Harald's version, so this patch converts that to the better one.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-13 15:43:58 -08:00
Jesper Juhl
3c791925da [PATCH] netfilter: fix build error due to missing has_bridge_parent macro
net/bridge/br_netfilter.c: In function `br_nf_post_routing':
net/bridge/br_netfilter.c:808: warning: implicit declaration of function `has_bridge_parent'

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: Harald Welte <laforge@netfilter.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-12 16:10:47 -08:00
Stephen Hemminger
bab1deea30 [BRIDGE]: fix error handling for add interface to bridge
Refactor how the bridge code interacts with kobject system.
It should still use kobjects even if not using sysfs.
Fix the error unwind handling in br_add_if.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-09 17:10:12 -08:00
Stephen Hemminger
5dce971acf [BRIDGE]: netfilter handle RCU during removal
Bridge netfilter code needs to handle the case where device is
removed from bridge while packet in process. In these cases the
bridge_parent can become null while processing.

This should fix: http://bugzilla.kernel.org/show_bug.cgi?id=5803

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-09 17:09:38 -08:00
Stephen Hemminger
b3f1be4b54 [BRIDGE]: fix for RCU and deadlock on device removal
Change Bridge receive path to correctly handle RCU removal of device
from bridge.  Also fixes deadlock between carrier_check and del_nbp.
This replaces the previous deleted flag fix.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-09 17:08:52 -08:00
Kirill Korotaev
ee4bb818ae [NETFILTER]: Fix possible overflow in netfilters do_replace()
netfilter's do_replace() can overflow on addition within SMP_ALIGN()
and/or on multiplication by NR_CPUS, resulting in a buffer overflow on
the copy_from_user().  In practice, the overflow on addition is
triggerable on all systems, whereas the multiplication one might require
much physical memory to be present due to the check above.  Either is
sufficient to overwrite arbitrary amounts of kernel memory.

I really hate adding the same check to all 4 versions of do_replace(),
but the code is duplicate...

Found by Solar Designer during security audit of OpenVZ.org

Signed-Off-By: Kirill Korotaev <dev@openvz.org>
Signed-Off-By: Solar Designer <solar@openwall.com>
Signed-off-by: Patrck McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-04 23:51:25 -08:00
Patrick McHardy
ad2ad0f965 [NETFILTER]: Fix undersized skb allocation in ipt_ULOG/ebt_ulog/nfnetlink_log
The skb allocated is always of size nlbufsize, even if that is smaller than
the size needed for the current packet.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-04 23:51:19 -08:00
Holger Eitzenberger
c2db292438 [NETFILTER]: ULOG/nfnetlink_log: Use better default value for 'nlbufsiz'
Performance tests showed that ULOG may fail on heavy loaded systems
because of failed order-N allocations (N >= 1).

The default value of 4096 is not optimal in the sense that it actually
allocates _two_ contigous physical pages.  Reasoning: ULOG uses
alloc_skb(), which adds another ~300 bytes for skb_shared_info.

This patch sets the default value to NLMSG_GOODSIZE and adds some
documentation at the top.

Signed-off-by: Holger Eitzenberger <heitzenberger@astaro.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-04 23:51:18 -08:00
Stephen Hemminger
3f4cfc2d11 [BRIDGE]: Fix device delete race.
This is a simpler fix for the two races in bridge device removal.
The Xen race of delif and notify is managed now by a new deleted flag.
No need for barriers or other locking because of rtnl mutex.

The del_timer_sync()'s are unnecessary, because br_stp_disable_port
delete's the timers, and they will finish running before RCU callback.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-31 17:44:07 -08:00
Patrick McHardy
ab67a4d511 [EBTABLES]: Handle SCTP/DCCP in ebt_{ip,log}
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-17 13:01:31 -08:00
Harald Welte
2e4e6a17af [NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables.  In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.

o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
  wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
  are now implemented as xt_FOOBAR.c files and provide module aliases
  to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
  include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
  around the xt_FOOBAR.h headers

Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 14:06:43 -08:00
Randy Dunlap
4fc268d24c [PATCH] capable/capability.h (net/)
net: Use <linux/capability.h> where capable() is used.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11 18:42:14 -08:00
Kris Katterjohn
8b3a70058b [NET]: Remove more unneeded typecasts on *malloc()
This removes more unneeded casts on the return value for kmalloc(),
sock_kmalloc(), and vmalloc().

Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-11 16:32:14 -08:00
David S. Miller
82bf7e97ac [NET]: Some more missing include/etherdevice.h includes
For compare_ether_addr()

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-11 16:32:11 -08:00
Bart De Schuymer
8a4c8a96a4 [EBTABLES] Don't match tcp/udp source/destination port for IP fragments
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-10 13:12:22 -08:00
Kris Katterjohn
d3f4a687f6 [NET]: Change memcmp(,,ETH_ALEN) to compare_ether_addr()
This changes some memcmp(one,two,ETH_ALEN) to compare_ether_addr(one,two).

Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-10 12:54:28 -08:00
Stephen Hemminger
ee02b3a613 [BRIDGE] netfilter: vlan + hw checksum = bug?
It looks like the bridge netfilter code does not correctly update
the hardware checksum after popping off the VLAN header.

This is by inspection, I have *not* tested this.
To test you would need to set up a filtering bridge with vlans
and a device the does hardware receive checksum (skge, or sungem)

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-06 13:13:29 -08:00
Kris Katterjohn
dbbc098828 [NET]: Use newer is_multicast_ether_addr() in some files
This uses is_multicast_ether_addr() because it has recently been
changed to do the same thing these seperate tests are doing.

Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-06 13:05:58 -08:00