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The dwmac-socfpga.c conflict was a case of a bug fix overlapping
changes in net-next to handle an error pointer differently.
Signed-off-by: David S. Miller <davem@davemloft.net>
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When the kernel deleted a vti6 interface, this interface was not removed from
the tunnels list. Thus, when the ip6_vti module was removed, this old interface
was found and the kernel tried to delete it again. This was leading to a kernel
panic.
Fixes: 61220ab34948 ("vti6: Enable namespace changing")
Signed-off-by: Yao Xiwei <xiwei.yao@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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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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Those are counterparts to nla_put_in_addr and nla_put_in6_addr.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IP addresses are often stored in netlink attributes. Add generic functions
to do that.
For nla_put_in_addr, it would be nicer to pass struct in_addr but this is
not used universally throughout the kernel, in way too many places __be32 is
used to store IPv4 address.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ipv6 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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The ipv6 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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Implement rtnl_link_ops->get_link_net() callback so that IFLA_LINK_NETNSID is
added to rtnetlink messages.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2014-12-03
1) Fix a set but not used warning. From Fabian Frederick.
2) Currently we make sequence number values available to userspace
only if we use ESN. Make the sequence number values also available
for non ESN states. From Zhi Ding.
3) Remove socket policy hashing. We don't need it because socket
policies are always looked up via a linked list. From Herbert Xu.
4) After removing socket policy hashing, we can use __xfrm_policy_link
in xfrm_policy_insert. From Herbert Xu.
5) Add a lookup method for vti6 tunnels with wildcard endpoints.
I forgot this when I initially implemented vti6.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now the vti_link_ops do not point the .dellink, for fb tunnel device
(ip_vti0), the net_device will be removed as the default .dellink is
unregister_netdevice_queue,but the tunnel still in the tunnel list,
then if we add a new vti tunnel, in ip_tunnel_find():
hlist_for_each_entry_rcu(t, head, hash_node) {
if (local == t->parms.iph.saddr &&
remote == t->parms.iph.daddr &&
link == t->parms.link &&
==> type == t->dev->type &&
ip_tunnel_key_match(&t->parms, flags, key))
break;
}
the panic will happen, cause dev of ip_tunnel *t is null:
[ 3835.072977] IP: [<ffffffffa04103fd>] ip_tunnel_find+0x9d/0xc0 [ip_tunnel]
[ 3835.073008] PGD b2c21067 PUD b7277067 PMD 0
[ 3835.073008] Oops: 0000 [#1] SMP
.....
[ 3835.073008] Stack:
[ 3835.073008] ffff8800b72d77f0 ffffffffa0411924 ffff8800bb956000 ffff8800b72d78e0
[ 3835.073008] ffff8800b72d78a0 0000000000000000 ffffffffa040d100 ffff8800b72d7858
[ 3835.073008] ffffffffa040b2e3 0000000000000000 0000000000000000 0000000000000000
[ 3835.073008] Call Trace:
[ 3835.073008] [<ffffffffa0411924>] ip_tunnel_newlink+0x64/0x160 [ip_tunnel]
[ 3835.073008] [<ffffffffa040b2e3>] vti_newlink+0x43/0x70 [ip_vti]
[ 3835.073008] [<ffffffff8150d4da>] rtnl_newlink+0x4fa/0x5f0
[ 3835.073008] [<ffffffff812f68bb>] ? nla_strlcpy+0x5b/0x70
[ 3835.073008] [<ffffffff81508fb0>] ? rtnl_link_ops_get+0x40/0x60
[ 3835.073008] [<ffffffff8150d11f>] ? rtnl_newlink+0x13f/0x5f0
[ 3835.073008] [<ffffffff81509cf4>] rtnetlink_rcv_msg+0xa4/0x270
[ 3835.073008] [<ffffffff8126adf5>] ? sock_has_perm+0x75/0x90
[ 3835.073008] [<ffffffff81509c50>] ? rtnetlink_rcv+0x30/0x30
[ 3835.073008] [<ffffffff81529e39>] netlink_rcv_skb+0xa9/0xc0
[ 3835.073008] [<ffffffff81509c48>] rtnetlink_rcv+0x28/0x30
....
modprobe ip_vti
ip link del ip_vti0 type vti
ip link add ip_vti0 type vti
rmmod ip_vti
do that one or more times, kernel will panic.
fix it by assigning ip_tunnel_dellink to vti_link_ops' dellink, in
which we skip the unregister of fb tunnel device. do the same on ip6_vti.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This change has no functional impact and simply addresses some coding
style issues detected by checkpatch. Specifically this change
adjusts "if" statements which also include the assignment of a
variable.
No changes to the resultant object files result as determined by objdiff.
Signed-off-by: Ian Morris <ipm@chirality.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently we can't lookup tunnels with wildcard endpoints.
This patch adds a method to lookup these tunnels in the
receive path.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Currently we need the IP6_TNL_F_CAP_XMIT capabiltiy to transmit
packets through an ipv6 tunnel. This capability is set when the
tunnel gets configured, based on the tunnel endpoint addresses.
On tunnels with wildcard tunnel endpoints, we need to do the
capabiltiy checking on a per packet basis like it is done in
the receive path.
This patch extends ip6_tnl_xmit_ctl() to take local and remote
addresses as parameters to allow for per packet capabiltiy
checking.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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vti6_dev_init() sets the dev->iflink via a call to
vti6_link_config(). After that, register_netdevice()
sets dev->iflink = -1. So we loose the iflink configuration
for vti6 tunnels. Fix this by using vti6_dev_init() as the
ndo_init function. Then vti6_dev_init() is called after
dev->iflink is set to -1 from register_netdevice().
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Testing xmit_more support with netperf and connected UDP sockets,
I found strange dst refcount false sharing.
Current handling of IFF_XMIT_DST_RELEASE is not optimal.
Dropping dst in validate_xmit_skb() is certainly too late in case
packet was queued by cpu X but dequeued by cpu Y
The logical point to take care of drop/force is in __dev_queue_xmit()
before even taking qdisc lock.
As Julian Anastasov pointed out, need for skb_dst() might come from some
packet schedulers or classifiers.
This patch adds new helper to cleanly express needs of various drivers
or qdiscs/classifiers.
Drivers that need skb_dst() in their ndo_start_xmit() should call
following helper in their setup instead of the prior :
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
->
netif_keep_dst(dev);
Instead of using a single bit, we use two bits, one being
eventually rebuilt in bonding/team drivers.
The other one, is permanent and blocks IFF_XMIT_DST_RELEASE being
rebuilt in bonding/team. Eventually, we could add something
smarter later.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
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vti6_locate() should not return an existing tunnel if
create is true. Otherwise it is possible to add the same
tunnel multiple times without getting an error.
So return NULL if the tunnel that should be created already
exists.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2014-07-30
This is the last pull request for ipsec-next before I'll be
off for two weeks starting on friday. David, can you please
take urgent ipsec patches directly into net/net-next during
this time?
1) Error handling simplifications for vti and vti6.
From Mathias Krause.
2) Remove a duplicate semicolon after a return statement.
From Christoph Paasch.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert
all users to pass NET_NAME_UNKNOWN.
Coccinelle patch:
@@
expression sizeof_priv, name, setup, txqs, rxqs, count;
@@
(
-alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs)
+alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs)
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-alloc_netdev_mq(sizeof_priv, name, setup, count)
+alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count)
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-alloc_netdev(sizeof_priv, name, setup)
+alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup)
)
v9: move comments here from the wrong commit
Signed-off-by: Tom Gundersen <teg@jklm.no>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The error handling in the module init and exit functions can be
shortened to safe us some code.
1/ Remove the code duplications in the init function, jump straight to
the existing cleanup code by adding some labels. Also give the error
message some more value by telling the reason why loading the module has
failed.
2/ Remove the error handling in the exit function as the only legitimate
reason xfrm6_protocol_deregister() might fail is inet6_del_protocol()
returning -1. That, in turn, means some other protocol handler had been
registered for this very protocol in the meantime. But that essentially
means we haven't been handling that protocol any more, anyway. What it
definitely means not is that we "can't deregister protocol". Therefore
just get rid of that bogus warning. It's plain wrong.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Conflicts:
drivers/net/bonding/bond_alb.c
drivers/net/ethernet/altera/altera_msgdma.c
drivers/net/ethernet/altera/altera_sgdma.c
net/ipv6/xfrm6_output.c
Several cases of overlapping changes.
The xfrm6_output.c has a bug fix which overlaps the renaming
of skb->local_df to skb->ignore_df.
In the Altera TSE driver cases, the register access cleanups
in net-next overlapped with bug fixes done in net.
Similarly a bug fix to send ALB packets in the bonding driver using
the right source address overlaps with cleanups in net-next.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Netdev_priv is an accessor function, and has no purpose if its result is
not used.
A simplified version of the semantic match that fixes this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@ local idexpression x; @@
-x = netdev_priv(...);
... when != x
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We need to use the mark we get from the tunnels o_key to
lookup the right vti state in the error handlers. This patch
ensures that.
Fixes: df3893c1 ("vti: Update the ipv4 side to use it's own receive hook.")
Fixes: fa9ad96d ("vti6: Update the ipv6 side to use its own receive hook.")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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If we fail to register one of the xfrm protocol handlers we will
unregister the pernet ops twice on the error exit path. This will
probably lead to a kernel panic as the double deregistration
leads to a double kfree().
Fix this by removing one of the calls to do it only once.
Fixes: fa9ad96d49 ("vti6: Update the ipv6 side to use its own...")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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vti6 is now fully namespace aware, so allow namespace changing
for vti devices.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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The tunnel endpoints of the xfrm_state we got from the xfrm_lookup
must match the tunnel endpoints of the vti interface. This patch
ensures this matching.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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With this patch we can tunnel ipv4 traffic via a vti6
interface. A vti6 interface can now have an ipv4 address
and ipv4 traffic can be routed via a vti6 interface.
The resulting traffic is xfrm transformed and tunneled
through ipv6 if matching IPsec policies and states are
present.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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With this patch, vti6 uses the IPsec protocol multiplexer to
register its own receive side hooks for ESP, AH and IPCOMP.
Vti6 now does the following on receive side:
1. Do an input policy check for the IPsec packet we received.
This is required because this packet could be already
prosecces by IPsec, so an inbuond policy check is needed.
2. Mark the packet with the i_key. The policy and the state
must match this key now. Policy and state belong to the vti
namespace and policy enforcement is done at the further layers.
3. Call the generic xfrm layer to do decryption and decapsulation.
4. Wait for a callback from the xfrm layer to properly clean the
skb to not leak informations on namespace transitions and
update the device statistics.
On transmit side:
1. Mark the packet with the o_key. The policy and the state
must match this key now.
2. Do a xfrm_lookup on the original packet with the mark applied.
3. Check if we got an IPsec route.
4. Clean the skb to not leak informations on namespace
transitions.
5. Attach the dst_enty we got from the xfrm_lookup to the skb.
6. Call dst_output to do the IPsec processing.
7. Do the device statistics.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Unlike ip6_tunnel, vti6 does not use the the tunnel
endpoint addresses to do route and xfrm lookups.
So no need to cache the flow informations. It also
does not make sense to calculate the mtu based on
such flow informations, so remove this too.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Unlike ip6_tunnel, vti6 can lookup multiple different dst entries,
dependent of the configured xfrm states. Therefore it does not make
sense to cache a dst_entry.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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There are many drivers calling alloc_percpu() to allocate pcpu stats
and then initializing ->syncp. So just introduce a helper function for them.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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initialise pcpu_tstats.syncp to kill the calltrace
[ 11.973950] Call Trace:
[ 11.973950] [<819bbaff>] dump_stack+0x48/0x60
[ 11.973950] [<819bbaff>] dump_stack+0x48/0x60
[ 11.973950] [<81078dcf>] __lock_acquire.isra.22+0x1bf/0xc10
[ 11.973950] [<81078dcf>] __lock_acquire.isra.22+0x1bf/0xc10
[ 11.973950] [<81079fa7>] lock_acquire+0x77/0xa0
[ 11.973950] [<81079fa7>] lock_acquire+0x77/0xa0
[ 11.973950] [<817ca7ab>] ? dev_get_stats+0xcb/0x130
[ 11.973950] [<817ca7ab>] ? dev_get_stats+0xcb/0x130
[ 11.973950] [<8183862d>] ip_tunnel_get_stats64+0x6d/0x230
[ 11.973950] [<8183862d>] ip_tunnel_get_stats64+0x6d/0x230
[ 11.973950] [<817ca7ab>] ? dev_get_stats+0xcb/0x130
[ 11.973950] [<817ca7ab>] ? dev_get_stats+0xcb/0x130
[ 11.973950] [<811cf8c1>] ? __nla_reserve+0x21/0xd0
[ 11.973950] [<811cf8c1>] ? __nla_reserve+0x21/0xd0
[ 11.973950] [<817ca7ab>] dev_get_stats+0xcb/0x130
[ 11.973950] [<817ca7ab>] dev_get_stats+0xcb/0x130
[ 11.973950] [<817d5409>] rtnl_fill_ifinfo+0x569/0xe20
[ 11.973950] [<817d5409>] rtnl_fill_ifinfo+0x569/0xe20
[ 11.973950] [<810352e0>] ? kvm_clock_read+0x20/0x30
[ 11.973950] [<810352e0>] ? kvm_clock_read+0x20/0x30
[ 11.973950] [<81008e38>] ? sched_clock+0x8/0x10
[ 11.973950] [<81008e38>] ? sched_clock+0x8/0x10
[ 11.973950] [<8106ba45>] ? sched_clock_local+0x25/0x170
[ 11.973950] [<8106ba45>] ? sched_clock_local+0x25/0x170
[ 11.973950] [<810da6bd>] ? __kmalloc+0x3d/0x90
[ 11.973950] [<810da6bd>] ? __kmalloc+0x3d/0x90
[ 11.973950] [<817b8c10>] ? __kmalloc_reserve.isra.41+0x20/0x70
[ 11.973950] [<817b8c10>] ? __kmalloc_reserve.isra.41+0x20/0x70
[ 11.973950] [<810da81a>] ? slob_alloc_node+0x2a/0x60
[ 11.973950] [<810da81a>] ? slob_alloc_node+0x2a/0x60
[ 11.973950] [<817b919a>] ? __alloc_skb+0x6a/0x2b0
[ 11.973950] [<817b919a>] ? __alloc_skb+0x6a/0x2b0
[ 11.973950] [<817d8795>] rtmsg_ifinfo+0x65/0xe0
[ 11.973950] [<817d8795>] rtmsg_ifinfo+0x65/0xe0
[ 11.973950] [<817cbd31>] register_netdevice+0x531/0x5a0
[ 11.973950] [<817cbd31>] register_netdevice+0x531/0x5a0
[ 11.973950] [<81892b87>] ? ip6_tnl_get_cap+0x27/0x90
[ 11.973950] [<81892b87>] ? ip6_tnl_get_cap+0x27/0x90
[ 11.973950] [<817cbdb6>] register_netdev+0x16/0x30
[ 11.973950] [<817cbdb6>] register_netdev+0x16/0x30
[ 11.973950] [<81f574a6>] vti6_init_net+0x1c4/0x1d4
[ 11.973950] [<81f574a6>] vti6_init_net+0x1c4/0x1d4
[ 11.973950] [<81f573af>] ? vti6_init_net+0xcd/0x1d4
[ 11.973950] [<81f573af>] ? vti6_init_net+0xcd/0x1d4
[ 11.973950] [<817c16df>] ops_init.constprop.11+0x17f/0x1c0
[ 11.973950] [<817c16df>] ops_init.constprop.11+0x17f/0x1c0
[ 11.973950] [<817c1779>] register_pernet_operations.isra.9+0x59/0x90
[ 11.973950] [<817c1779>] register_pernet_operations.isra.9+0x59/0x90
[ 11.973950] [<817c18d1>] register_pernet_device+0x21/0x60
[ 11.973950] [<817c18d1>] register_pernet_device+0x21/0x60
[ 11.973950] [<81f574b6>] ? vti6_init_net+0x1d4/0x1d4
[ 11.973950] [<81f574b6>] ? vti6_init_net+0x1d4/0x1d4
[ 11.973950] [<81f574c7>] vti6_tunnel_init+0x11/0x68
[ 11.973950] [<81f574c7>] vti6_tunnel_init+0x11/0x68
[ 11.973950] [<81f572a1>] ? mip6_init+0x73/0xb4
[ 11.973950] [<81f572a1>] ? mip6_init+0x73/0xb4
[ 11.973950] [<81f0cba4>] do_one_initcall+0xbb/0x15b
[ 11.973950] [<81f0cba4>] do_one_initcall+0xbb/0x15b
[ 11.973950] [<811a00d8>] ? sha_transform+0x528/0x1150
[ 11.973950] [<811a00d8>] ? sha_transform+0x528/0x1150
[ 11.973950] [<81f0c544>] ? repair_env_string+0x12/0x51
[ 11.973950] [<81f0c544>] ? repair_env_string+0x12/0x51
[ 11.973950] [<8105c30d>] ? parse_args+0x2ad/0x440
[ 11.973950] [<8105c30d>] ? parse_args+0x2ad/0x440
[ 11.973950] [<810546be>] ? __usermodehelper_set_disable_depth+0x3e/0x50
[ 11.973950] [<810546be>] ? __usermodehelper_set_disable_depth+0x3e/0x50
[ 11.973950] [<81f0cd27>] kernel_init_freeable+0xe3/0x182
[ 11.973950] [<81f0cd27>] kernel_init_freeable+0xe3/0x182
[ 11.973950] [<81f0c532>] ? do_early_param+0x7a/0x7a
[ 11.973950] [<81f0c532>] ? do_early_param+0x7a/0x7a
[ 11.973950] [<819b5b1b>] kernel_init+0xb/0x100
[ 11.973950] [<819b5b1b>] kernel_init+0xb/0x100
[ 11.973950] [<819cebf7>] ret_from_kernel_thread+0x1b/0x28
[ 11.973950] [<819cebf7>] ret_from_kernel_thread+0x1b/0x28
[ 11.973950] [<819b5b10>] ? rest_init+0xc0/0xc0
[ 11.973950] [<819b5b10>] ? rest_init+0xc0/0xc0
Before 469bdcefdc ("ipv6: fix the use of pcpu_tstats in ip6_vti.c"),
the pcpu_tstats.syncp is not used to pretect the 64bit elements of
pcpu_tstats, so not appear this calltrace.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
net/ipv6/ip6_tunnel.c
net/ipv6/ip6_vti.c
ipv6 tunnel statistic bug fixes conflicting with consolidation into
generic sw per-cpu net stats.
qlogic conflict between queue counting bug fix and the addition
of multiple MAC address support.
Signed-off-by: David S. Miller <davem@davemloft.net>
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They are same, so unify them as one, pcpu_sw_netstats.
Define pcpu_sw_netstat in netdevice.h, remove pcpu_tstats
from if_tunnel and remove br_cpu_netstats from br_private.h
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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when read/write the 64bit data, the correct lock should be hold.
and we can use the generic vti6_get_stats to return stats, and
not define a new one in ip6_vti.c
Fixes: 87b6d218f3adb ("tunnel: implement 64 bits statistics")
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds IPv6 support for IPsec virtual tunnel interfaces
(vti). IPsec virtual tunnel interfaces provide a routable interface
for IPsec tunnel endpoints.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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