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The ipv4 code uses a mixture of coding styles. In some instances check
for NULL pointer is done as x == NULL and sometimes as !x. !x is
preferred according to checkpatch and this patch makes the code
consistent by adopting the latter form.
No changes detected by objdiff.
Signed-off-by: Ian Morris <ipm@chirality.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a link is being established, the two endpoints advertise their
respective interface MTU in the transmitted RESET and ACTIVATE messages.
If there is any difference, the lower of the two MTUs will be selected
for use by both endpoints.
However, as a remnant of earlier attempts to introduce TIPC level
routing. there also exists an MTU discovery mechanism. If an intermediate
node has a lower MTU than the two endpoints, they will discover this
through a bisectional approach, and finally adopt this MTU for common use.
Since there is no TIPC level routing, and probably never will be,
this mechanism doesn't make any sense, and only serves to make the
link level protocol unecessarily complex.
In this commit, we eliminate the MTU discovery algorithm,and fall back
to the simple MTU advertising approach. This change is fully backwards
compatible.
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a bearer is disabled manually, all its links have to be reset
and deleted. However, if there is a remaining, parallel link ready
to take over a deleted link's traffic, we currently delay the delete
of the removed link until the failover procedure is finished. This
is because the remaining link needs to access state from the reset
link, such as the last received packet number, and any partially
reassembled buffer, in order to perform a successful failover.
In this commit, we do instead move the state data over to the new
link, so that it can fulfill the procedure autonomously, without
accessing any data on the old link. This means that we can now
proceed and delete all pertaining links immediately when a bearer
is disabled. This saves us from some unnecessary complexity in such
situations.
We also choose to change the confusing definitions CHANGEOVER_PROTOCOL,
ORIGINAL_MSG and DUPLICATE_MSG to the more descriptive TUNNEL_PROTOCOL,
FAILOVER_MSG and SYNCH_MSG respectively.
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In commit 8b4ed8634f8b3f9aacfc42b4a872d30c36b9e255
("tipc: eliminate race condition at dual link establishment")
we introduced a parallel link synchronization mechanism that
guarentees sequential delivery even for users switching from
an old to a newly established link. The new mechanism makes it
unnecessary to deliver the tunneled duplicate packets back to
the old link, as we are currently doing. It is now sufficient
to use the last tunneled packet's inner sequence number as
synchronization point between the two parallel links, whereafter
it can be dropped.
In this commit, we drop the duplicate packets arriving on the new
link, after updating the synchronization point at each new arrival.
Although it would now have been sufficient for the other endpoint
to only tunnel the last packet in its send queue, and not the
entire queue, we must still do this to maintain compatibility
with older nodes.
This commit makes it possible to get rid if some complex
interaction between the two parallel links.
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
drivers/net/usb/asix_common.c
drivers/net/usb/sr9800.c
drivers/net/usb/usbnet.c
include/linux/usb/usbnet.h
net/ipv4/tcp_ipv4.c
net/ipv6/tcp_ipv6.c
The TCP conflicts were overlapping changes. In 'net' we added a
READ_ONCE() to the socket cached RX route read, whilst in 'net-next'
Eric Dumazet touched the surrounding code dealing with how mini
sockets are handled.
With USB, it's a case of the same bug fix first going into net-next
and then I cherry picked it back into net.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Fix use-after-free with mac80211 RX A-MPDU reorder timer, from
Johannes Berg.
2) iwlwifi leaks memory every module load/unload cycles, fix from Larry
Finger.
3) Need to use for_each_netdev_safe() in rtnl_group_changelink()
otherwise we can crash, from WANG Cong.
4) mlx4 driver does register_netdev() too early in the probe sequence,
from Ido Shamay.
5) Don't allow router discovery hop limit to decrease the interface's
hop limit, from D.S. Ljungmark.
6) tx_packets and tx_bytes improperly accounted for certain classes of
USB network devices, fix from Ben Hutchings.
7) ip{6}mr_rules_init() mistakenly use plain kfree to release the ipmr
tables in the error path, they must instead use ip{6}mr_free_table().
Fix from WANG Cong.
8) cxgb4 doesn't properly quiesce all RX activity before unregistering
the netdevice. Fix from Hariprasad Shenai.
9) Fix hash corruptions in ipvlan driver, from Jiri Benc.
10) nla_memcpy(), like a real memcpy, should fully initialize the
destination buffer, even if the source attribute is smaller. Fix
from Jiri Benc.
11) Fix wrong error code returned from iucv_sock_sendmsg(). We should
use whatever sock_alloc_send_skb() put into 'err'. From Eugene
Crosser.
12) Fix slab object leak on module unload in TIPC, from Ying Xue.
13) Need a READ_ONCE() when reading the cached RX socket route in
tcp_v{4,6}_early_demux(). From Michal Kubecek.
14) Still too many problems with TPC support in the ath9k driver, so
disable it for now. From Felix Fietkau.
15) When in AP mode the rtlwifi driver can leak DMA mappings, fix from
Larry Finger.
16) Missing kzalloc() failure check in gs_usb CAN driver, from Colin Ian
King.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
cxgb4: Fix to dump devlog, even if FW is crashed
cxgb4: Firmware macro changes for fw verison 1.13.32.0
bnx2x: Fix kdump when iommu=on
bnx2x: Fix kdump on 4-port device
mac80211: fix RX A-MPDU session reorder timer deletion
MAINTAINERS: Update Intel Wired Ethernet Driver info
tipc: fix a slab object leak
net/usb/r8152: add device id for Lenovo TP USB 3.0 Ethernet
af_iucv: fix AF_IUCV sendmsg() errno
openvswitch: Return vport module ref before destruction
netlink: pad nla_memcpy dest buffer with zeroes
bonding: Bonding Overriding Configuration logic restored.
ipvlan: fix check for IP addresses in control path
ipvlan: do not use rcu operations for address list
ipvlan: protect against concurrent link removal
ipvlan: fix addr hash list corruption
net: fec: setup right value for mdio hold time
net: tcp6: fix double call of tcp_v6_fill_cb()
cxgb4vf: Fix sparse warnings
netns: don't clear nsid too early on removal
...
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
This contains just a single fix for a crash I happened to randomly
run into today during testing. It's clearly been around for a while,
but is pretty hard to trigger, even when I tried explicitly (and
modified the code to make it more likely) it rarely did.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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There's an issue with the way the RX A-MPDU reorder timer is
deleted that can cause a kernel crash like this:
* tid_rx is removed - call_rcu(ieee80211_free_tid_rx)
* station is destroyed
* reorder timer fires before ieee80211_free_tid_rx() runs,
accessing the station, thus potentially crashing due to
the use-after-free
The station deletion is protected by synchronize_net(), but
that isn't enough -- ieee80211_free_tid_rx() need not have
run when that returns (it deletes the timer.) We could use
rcu_barrier() instead of synchronize_net(), but that's much
more expensive.
Instead, to fix this, add a field tracking that the session
is being deleted. In this case, the only re-arming of the
timer happens with the reorder spinlock held, so make that
code not rearm it if the session is being deleted and also
delete the timer after setting that field. This ensures the
timer cannot fire after ___ieee80211_stop_rx_ba_session()
returns, which fixes the problem.
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When remove TIPC module, there is a warning to remind us that a slab
object is leaked like:
root@localhost:~# rmmod tipc
[ 19.056226] =============================================================================
[ 19.057549] BUG TIPC (Not tainted): Objects remaining in TIPC on kmem_cache_close()
[ 19.058736] -----------------------------------------------------------------------------
[ 19.058736]
[ 19.060287] INFO: Slab 0xffffea0000519a00 objects=23 used=1 fp=0xffff880014668b00 flags=0x100000000004080
[ 19.061915] INFO: Object 0xffff880014668000 @offset=0
[ 19.062717] kmem_cache_destroy TIPC: Slab cache still has objects
This is because the listening socket of TIPC topology server is not
closed before TIPC proto handler is unregistered with proto_unregister().
However, as the socket is closed in tipc_exit_net() which is called by
unregister_pernet_subsys() during unregistering TIPC namespace operation,
the warning can be eliminated if calling unregister_pernet_subsys() is
moved before calling proto_unregister().
Fixes: e05b31f4bf89 ("tipc: make tipc socket support net namespace")
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When sending over AF_IUCV socket, errno was incorrectly set to
ENOMEM even when other values where appropriate, notably EAGAIN.
With this patch, error indicator returned by sock_alloc_send_skb()
is passed to the caller, rather than being overwritten with ENOMEM.
Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Return module reference before invoking the respective vport
->destroy() function. This is needed as ovs_vport_del() is not
invoked inside an RCU read side critical section so the kfree
can occur immediately before returning to ovs_vport_del().
Returning the module reference before ->destroy() is safe because
the module unregistration is blocked on ovs_lock which we hold
while destroying the datapath.
Fixes: 62b9c8d0372d ("ovs: Turn vports with dependencies into separate modules")
Reported-by: Pravin Shelar <pshelar@nicira.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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tcp_v6_fill_cb() will be called twice if socket's state changes from
TCP_TIME_WAIT to TCP_LISTEN. That can result in control buffer data
corruption because in the second tcp_v6_fill_cb() call it's not copying
IP6CB(skb) anymore, but 'seq', 'end_seq', etc., so we can get weird and
unpredictable results. Performance loss of up to 1200% has been observed
in LTP/vxlan03 test.
This can be fixed by copying inet6_skb_parm to the beginning of 'cb'
only if xfrm6_policy_check() and tcp_v6_fill_cb() are going to be
called again.
Fixes: 2dc49d1680b53 ("tcp6: don't move IP6CB before xfrm6_policy_check()")
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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With the current code, ids are removed too early.
Suppose you have an ipip interface that stands in the netns foo and its link
part in the netns bar (so the netns bar has an nsid into the netns foo).
Now, you remove the netns bar:
- the bar nsid into the netns foo is removed
- the netns exit method of ipip is called, thus our ipip iface is removed:
=> a netlink message is sent in the netns foo to advertise this deletion
=> this netlink message requests an nsid for bar, thus a new nsid is
allocated for bar and never removed.
We must remove nsids when we are sure that nobody will refer to netns currently
cleaned.
Fixes: 0c7aecd4bde4 ("netns: add rtnl cmd to add and get peer netns ids")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A local route may have a lower hop_limit set than global routes do.
RFC 3756, Section 4.2.7, "Parameter Spoofing"
> 1. The attacker includes a Current Hop Limit of one or another small
> number which the attacker knows will cause legitimate packets to
> be dropped before they reach their destination.
> As an example, one possible approach to mitigate this threat is to
> ignore very small hop limits. The nodes could implement a
> configurable minimum hop limit, and ignore attempts to set it below
> said limit.
Signed-off-by: D.S. Ljungmark <ljungmark@modio.se>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case we move the whole dev group to another netns,
we should call for_each_netdev_safe(), otherwise we get
a soft lockup:
NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ip:798]
irq event stamp: 255424
hardirqs last enabled at (255423): [<ffffffff81a2aa95>] restore_args+0x0/0x30
hardirqs last disabled at (255424): [<ffffffff81a2ad5a>] apic_timer_interrupt+0x6a/0x80
softirqs last enabled at (255422): [<ffffffff81079ebc>] __do_softirq+0x2c1/0x3a9
softirqs last disabled at (255417): [<ffffffff8107a190>] irq_exit+0x41/0x95
CPU: 0 PID: 798 Comm: ip Not tainted 4.0.0-rc4+ #881
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task: ffff8800d1b88000 ti: ffff880119530000 task.ti: ffff880119530000
RIP: 0010:[<ffffffff810cad11>] [<ffffffff810cad11>] debug_lockdep_rcu_enabled+0x28/0x30
RSP: 0018:ffff880119533778 EFLAGS: 00000246
RAX: ffff8800d1b88000 RBX: 0000000000000002 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffff8800d1b888c8 RDI: ffff8800d1b888c8
RBP: ffff880119533778 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000b5c2 R12: 0000000000000246
R13: ffff880119533708 R14: 00000000001d5a40 R15: ffff88011a7d5a40
FS: 00007fc01315f740(0000) GS:ffff88011a600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007f367a120988 CR3: 000000011849c000 CR4: 00000000000007f0
Stack:
ffff880119533798 ffffffff811ac868 ffffffff811ac831 ffffffff811ac828
ffff8801195337c8 ffffffff811ac8c9 ffff8801195339b0 ffff8801197633e0
0000000000000000 ffff8801195339b0 ffff8801195337d8 ffffffff811ad2d7
Call Trace:
[<ffffffff811ac868>] rcu_read_lock+0x37/0x6e
[<ffffffff811ac831>] ? rcu_read_unlock+0x5f/0x5f
[<ffffffff811ac828>] ? rcu_read_unlock+0x56/0x5f
[<ffffffff811ac8c9>] __fget+0x2a/0x7a
[<ffffffff811ad2d7>] fget+0x13/0x15
[<ffffffff811be732>] proc_ns_fget+0xe/0x38
[<ffffffff817c7714>] get_net_ns_by_fd+0x11/0x59
[<ffffffff817df359>] rtnl_link_get_net+0x33/0x3e
[<ffffffff817df3d7>] do_setlink+0x73/0x87b
[<ffffffff810b28ce>] ? trace_hardirqs_off+0xd/0xf
[<ffffffff81a2aa95>] ? retint_restore_args+0xe/0xe
[<ffffffff817e0301>] rtnl_newlink+0x40c/0x699
[<ffffffff817dffe0>] ? rtnl_newlink+0xeb/0x699
[<ffffffff81a29246>] ? _raw_spin_unlock+0x28/0x33
[<ffffffff8143ed1e>] ? security_capable+0x18/0x1a
[<ffffffff8107da51>] ? ns_capable+0x4d/0x65
[<ffffffff817de5ce>] rtnetlink_rcv_msg+0x181/0x194
[<ffffffff817de407>] ? rtnl_lock+0x17/0x19
[<ffffffff817de407>] ? rtnl_lock+0x17/0x19
[<ffffffff817de44d>] ? __rtnl_unlock+0x17/0x17
[<ffffffff818327c6>] netlink_rcv_skb+0x4d/0x93
[<ffffffff817de42f>] rtnetlink_rcv+0x26/0x2d
[<ffffffff81830f18>] netlink_unicast+0xcb/0x150
[<ffffffff8183198e>] netlink_sendmsg+0x501/0x523
[<ffffffff8115cba9>] ? might_fault+0x59/0xa9
[<ffffffff817b5398>] ? copy_from_user+0x2a/0x2c
[<ffffffff817b7b74>] sock_sendmsg+0x34/0x3c
[<ffffffff817b7f6d>] ___sys_sendmsg+0x1b8/0x255
[<ffffffff8115c5eb>] ? handle_pte_fault+0xbd5/0xd4a
[<ffffffff8100a2b0>] ? native_sched_clock+0x35/0x37
[<ffffffff8109e94b>] ? sched_clock_local+0x12/0x72
[<ffffffff8109eb9c>] ? sched_clock_cpu+0x9e/0xb7
[<ffffffff810cadbf>] ? rcu_read_lock_held+0x3b/0x3d
[<ffffffff811ac1d8>] ? __fcheck_files+0x4c/0x58
[<ffffffff811ac946>] ? __fget_light+0x2d/0x52
[<ffffffff817b8adc>] __sys_sendmsg+0x42/0x60
[<ffffffff817b8b0c>] SyS_sendmsg+0x12/0x1c
[<ffffffff81a29e32>] system_call_fastpath+0x12/0x17
Fixes: e7ed828f10bd8 ("netlink: support setting devgroup parameters")
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On s390x, gcc 4.8 compiles this part of tcp_v6_early_demux()
struct dst_entry *dst = sk->sk_rx_dst;
if (dst)
dst = dst_check(dst, inet6_sk(sk)->rx_dst_cookie);
to code reading sk->sk_rx_dst twice, once for the test and once for
the argument of ip6_dst_check() (dst_check() is inline). This allows
ip6_dst_check() to be called with null first argument, causing a crash.
Protect sk->sk_rx_dst access by READ_ONCE() both in IPv4 and IPv6
TCP early demux code.
Fixes: 41063e9dd119 ("ipv4: Early TCP socket demux.")
Fixes: c7109986db3c ("ipv6: Early TCP socket demux")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull nfsd fixes from Bruce Fields:
"Two main issues:
- We found that turning on pNFS by default (when it's configured at
build time) was too aggressive, so we want to switch the default
before the 4.0 release.
- Recent client changes to increase open parallelism uncovered a
serious bug lurking in the server's open code.
Also fix a krb5/selinux regression.
The rest is mainly smaller pNFS fixes"
* 'for-4.0' of git://linux-nfs.org/~bfields/linux:
sunrpc: make debugfs file creation failure non-fatal
nfsd: require an explicit option to enable pNFS
NFSD: Fix bad update of layout in nfsd4_return_file_layout
NFSD: Take care the return value from nfsd4_encode_stateid
NFSD: Printk blocklayout length and offset as format 0x%llx
nfsd: return correct lockowner when there is a race on hash insert
nfsd: return correct openowner when there is a race to put one in the hash
NFSD: Put exports after nfsd4_layout_verify fail
NFSD: Error out when register_shrinker() fail
NFSD: Take care the return value from nfsd4_decode_stateid
NFSD: Check layout type when returning client layouts
NFSD: restore trace event lost in mismerge
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We currently have a problem that SELinux policy is being enforced when
creating debugfs files. If a debugfs file is created as a side effect of
doing some syscall, then that creation can fail if the SELinux policy
for that process prevents it.
This seems wrong. We don't do that for files under /proc, for instance,
so Bruce has proposed a patch to fix that.
While discussing that patch however, Greg K.H. stated:
"No kernel code should care / fail if a debugfs function fails, so
please fix up the sunrpc code first."
This patch converts all of the sunrpc debugfs setup code to be void
return functins, and the callers to not look for errors from those
functions.
This should allow rpc_clnt and rpc_xprt creation to work, even if the
kernel fails to create debugfs files for some reason.
Symptoms were failing krb5 mounts on systems using gss-proxy and
selinux.
Fixes: 388f0c776781 "sunrpc: add a debugfs rpc_xprt directory..."
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Virtual interfaces are supposed to set an iflink value != of their ifindex.
It was not the case for some of them, like vxlan, bond or bridge.
Let's set iflink to 0 when dev->rtnl_link_ops is set.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that all users of iflink have the ndo_get_iflink handler available, it's
possible to remove this field.
By default, dev_get_iflink() returns the ifindex of the interface.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't use dev->iflink anymore.
CC: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't use dev->iflink anymore.
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't use dev->iflink anymore.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't use dev->iflink anymore.
CC: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't use dev->iflink anymore.
CC: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The goal of this patch is to prepare the removal of the iflink field. It
introduces a new ndo function, which will be implemented by virtual interfaces.
There is no functional change into this patch. All readers of iflink field
now call dev_get_iflink().
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Correct spelling of locally.
Also remove extra space before tab character in struct fq_flow.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The CAN_RAW socket can set multiple CAN identifier specific filters that lead
to multiple filters in the af_can.c filter processing. These filters are
indenpendent from each other which leads to logical OR'ed filters when applied.
This socket option joines the given CAN filters in the way that only CAN frames
are passed to user space that matched *all* given CAN filters. The semantic for
the applied filters is therefore changed to a logical AND.
This is useful especially when the filterset is a combination of filters where
the CAN_INV_FILTER flag is set in order to notch single CAN IDs or CAN ID
ranges from the incoming traffic.
As the raw_rcv() function is executed from NET_RX softirq the introduced
variables are implemented as per-CPU variables to avoid extensive locking at
CAN frame reception time.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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The CAN_RAW socket can set multiple CAN identifier specific filters that lead
to multiple filters in the af_can.c filter processing. These filters are
indenpendent from each other which leads to logical OR'ed filters when applied.
This patch makes sure that every CAN frame which is filtered for a specific
socket is only delivered once to the user space. This is independent from the
number of matching CAN filters of this socket.
As the raw_rcv() function is executed from NET_RX softirq the introduced
variables are implemented as per-CPU variables to avoid extensive locking at
CAN frame reception time.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
Lots of updates for net-next; along with the usual flurry
of small fixes, cleanups and internal features we have:
* VHT support for TDLS and IBSS (conditional on drivers though)
* first TX performance improvements (the biggest will come later)
* many suspend/resume (race) fixes
* name_assign_type support from Tom Gundersen
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the upcoming fast-xmit patch, changing station state will
build a header cache based on the station's capabilities, and
as the QoS capability (sta.wme) impacts the header, it needs
to be set before.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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These are mandated by IEEE802.11-2012 section 8.5.8.6 and IEEE802.11ac-2013
section 8.5.8.16.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Add VHT support for IBSS. Drivers could activate
this feature by setting NL80211_EXT_FEATURE_VHT_IBSS
flag.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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In case of wide bandwidth (wider than 20MHz) used by IBSS,
scan all channels in chandef to be able to find neighboring
IBSS netwqworks that use the same overall channels but a different
control channel.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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In order to look up the RA station earlier to implement a TX
fastpath, factor out the lookup from ieee80211_build_hdr().
To always have a valid station pointer, also move some of the
checks into the new function.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Indicating just the peer's capability is fairly pointless
if the local device doesn't support it. Make the variable
track both combined, and remove the 'local support' check
in the TX path.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Louis reported that a static checker was complaining that
the 'dst' variable was set (multiple times) but not used.
This is due to a previous commit having removed the usage
(apparently erroneously), so add it back.
Fixes: a344d6778a98 ("mac80211: allow drivers to support NL80211_SCAN_FLAG_RANDOM_ADDR")
Reported-by: Louis Langholtz <lou_langholtz@me.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This code is written using an anti-pattern called "success handling"
which makes it hard to read, especially if you are used to normal kernel
style. It should instead be written as a list of directives in a row
with branches for error handling.
(Basically copied from Dan's previous patch for CCM)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This code is written using an anti-pattern called "success handling"
which makes it hard to read, especially if you are used to normal kernel
style. It should instead be written as a list of directives in a row
with branches for error handling.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Commit 8ade538bf39b ("mac80111: Add BIP-GMAC-128 and BIP-GMAC-256
ciphers") had the success return in incorrect place before the
crypto_aead_setauthsize() call which practically ended up skipping that
call unconditionally.
The missing call did not actually change any functionality since
GMAC_MIC_LEN (16) is identical to the maxauthsize in gcm(aes) and as
such, the default value used for the authsize parameter.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This will expose in /sys whether the ifname of a device is set by
userspace or generated by the kernel. The latter kind (wlanX, etc)
is not deterministic, so userspace needs to rename these devices
to names that are guaranteed to stay the same between reboots. The
former, however should never be renamed, so userspace needs to be
able to reliably tell the difference.
Similar functionality was introduced for the rtnetlink core in
commit 5517750f058e ("net: rtnetlink - make create_link take name_assign_type")
Signed-off-by: Tom Gundersen <teg@jklm.no>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Brett Rudley <brudley@broadcom.com>
Cc: Arend van Spriel <arend@broadcom.com>
Cc: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Cc: Hante Meuleman <meuleman@broadcom.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
[reformat changelog to fit 72 cols]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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If a peer or some local agent (rate control, ...) decides to start
an aggregation session but doesn't support HT (which also implies
QoS), reject it.
This is mostly a corner case as such peers normally won't try to
use block-ack sessions and rate control wouldn't start them, but
technically QoS stations could request it according to the spec.
However, since drivers don't really support such non-HT sessions
it's better to reject them.
Also, while at it, move the tracing for TX sessions earlier so it
captures the error cases as well.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Seems Broadcom TDLS peers (Nexus 5, Xperia Z3) refuse to allow TDLS
connection when channel-switching is supported but the regulatory
classes IE is missing from the setup request.
Add a chandef to reg-class translation function to cfg80211 and use it
to add the required IE during setup. For now add only the current
regulatory class as supported - it is enough to resolve the
compatibility issue.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Stop scan before authentication or association to make sure
that nothing interferes with connection flow.
Currently mac80211 defers RX auth and assoc packets (among other ones)
until after the scan is complete, so auth during scan is likely to fail
if scan took too much time.
Signed-off-by: David Spinadel <david.spinadel@intel.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Pass the initial net-detect delay (NL80211_ATTR_SCHED_SCAN_DELAY)
attribute in the WoWLAN info response.
Additionally, remove a bogus TODO comment.
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This can allow the driver to take action based on the reason
of the deauth.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This can allow the driver to take action based on the
success / failure of the association.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This can allow the driver to take action based on the
success / failure of the authentication.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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