GitHub/moto-9609/android_kernel_motorola_exynos9610.git
9 years agonet: fib6: fib6_commit_metrics: fix potential NULL pointer dereference
Daniel Borkmann [Mon, 5 Jan 2015 22:57:43 +0000 (23:57 +0100)]
net: fib6: fib6_commit_metrics: fix potential NULL pointer dereference

When IPv6 host routes with metrics attached are being added, we fetch
the metrics store from the dst via COW through dst_metrics_write_ptr(),
added through commit e5fd387ad5b3.

One remaining problem here is that we actually call into inet_getpeer()
and may end up allocating/creating a new peer from the kmemcache, which
may fail.

Example trace from perf probe (inet_getpeer:41) where create is 1:

ip 6877 [002] 4221.391591: probe:inet_getpeer: (ffffffff8165e293)
  85e294 inet_getpeer.part.7 (<- kmem_cache_alloc())
  85e578 inet_getpeer
  8eb333 ipv6_cow_metrics
  8f10ff fib6_commit_metrics

Therefore, a check for NULL on the return of dst_metrics_write_ptr()
is necessary here.

Joint work with Florian Westphal.

Fixes: e5fd387ad5b3 ("ipv6: do not overwrite inetpeer metrics prematurely")
Cc: Michal Kubeček <mkubecek@suse.cz>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: Do not call ndo_dflt_fdb_dump if ndo_fdb_dump is defined
Hubert Sokolowski [Mon, 5 Jan 2015 17:29:21 +0000 (17:29 +0000)]
net: Do not call ndo_dflt_fdb_dump if ndo_fdb_dump is defined

Add checking whether the call to ndo_dflt_fdb_dump is needed.
It is not expected to call ndo_dflt_fdb_dump unconditionally
by some drivers (i.e. qlcnic or macvlan) that defines
own ndo_fdb_dump. Other drivers define own ndo_fdb_dump
and don't want ndo_dflt_fdb_dump to be called at all.
At the same time it is desirable to call the default dump
function on a bridge device.
Fix attributes that are passed to dev->netdev_ops->ndo_fdb_dump.
Add extra checking in br_fdb_dump to avoid duplicate entries
as now filter_dev can be NULL.

Following tests for filtering have been performed before
the change and after the patch was applied to make sure
they are the same and it doesn't break the filtering algorithm.

[root@localhost ~]# cd /root/iproute2-3.18.0/bridge
[root@localhost bridge]# modprobe dummy
[root@localhost bridge]# ./bridge fdb add f1:f2:f3:f4:f5:f6 dev dummy0
[root@localhost bridge]# brctl addbr br0
[root@localhost bridge]# brctl addif  br0 dummy0
[root@localhost bridge]# ip link set dev br0 address 02:00:00:12:01:04
[root@localhost bridge]# # show all
[root@localhost bridge]# ./bridge fdb show
33:33:00:00:00:01 dev p2p1 self permanent
01:00:5e:00:00:01 dev p2p1 self permanent
33:33:ff:ac:ce:32 dev p2p1 self permanent
33:33:00:00:02:02 dev p2p1 self permanent
01:00:5e:00:00:fb dev p2p1 self permanent
33:33:00:00:00:01 dev p7p1 self permanent
01:00:5e:00:00:01 dev p7p1 self permanent
33:33:ff:79:50:53 dev p7p1 self permanent
33:33:00:00:02:02 dev p7p1 self permanent
01:00:5e:00:00:fb dev p7p1 self permanent
f2:46:50:85:6d:d9 dev dummy0 master br0 permanent
f2:46:50:85:6d:d9 dev dummy0 vlan 1 master br0 permanent
33:33:00:00:00:01 dev dummy0 self permanent
f1:f2:f3:f4:f5:f6 dev dummy0 self permanent
33:33:00:00:00:01 dev br0 self permanent
02:00:00:12:01:04 dev br0 vlan 1 master br0 permanent
02:00:00:12:01:04 dev br0 master br0 permanent
[root@localhost bridge]# # filter by bridge
[root@localhost bridge]# ./bridge fdb show br br0
f2:46:50:85:6d:d9 dev dummy0 master br0 permanent
f2:46:50:85:6d:d9 dev dummy0 vlan 1 master br0 permanent
33:33:00:00:00:01 dev dummy0 self permanent
f1:f2:f3:f4:f5:f6 dev dummy0 self permanent
33:33:00:00:00:01 dev br0 self permanent
02:00:00:12:01:04 dev br0 vlan 1 master br0 permanent
02:00:00:12:01:04 dev br0 master br0 permanent
[root@localhost bridge]# # filter by port
[root@localhost bridge]# ./bridge fdb show brport dummy0
f2:46:50:85:6d:d9 master br0 permanent
f2:46:50:85:6d:d9 vlan 1 master br0 permanent
33:33:00:00:00:01 self permanent
f1:f2:f3:f4:f5:f6 self permanent
[root@localhost bridge]# # filter by port + bridge
[root@localhost bridge]# ./bridge fdb show br br0 brport dummy0
f2:46:50:85:6d:d9 master br0 permanent
f2:46:50:85:6d:d9 vlan 1 master br0 permanent
33:33:00:00:00:01 self permanent
f1:f2:f3:f4:f5:f6 self permanent
[root@localhost bridge]#

Signed-off-by: Hubert Sokolowski <hubert.sokolowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'ip_cmsg_csum'
David S. Miller [Tue, 6 Jan 2015 03:44:56 +0000 (22:44 -0500)]
Merge branch 'ip_cmsg_csum'

Tom Herbert says:

====================
ip: Support checksum returned in csmg

This patch set allows the packet checksum for a datagram socket
to be returned in csum data in recvmsg. This allows userspace
to implement its own checksum over the data, for instance if an
IP tunnel was be implemented in user space, the inner checksum
could be validated.

Changes in this patch set:
  - Move checksum conversion to inet_sock from udp_sock. This
    generalizes checksum conversion for use with other protocols.
  - Move IP cmsg constants to a header file and make processing
    of the flags more efficient in ip_cmsg_recv
  - Return checksum value in cmsg. This is specifically the unfolded
    32 bit checksum of the full packet starting from the first byte
    returned in recvmsg

Tested: Wrote a little server to get checksums in cmsg for UDP and
        verfied correct checksum is returned.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoip: Add offset parameter to ip_cmsg_recv
Tom Herbert [Mon, 5 Jan 2015 21:56:17 +0000 (13:56 -0800)]
ip: Add offset parameter to ip_cmsg_recv

Add ip_cmsg_recv_offset function which takes an offset argument
that indicates the starting offset in skb where data is being received
from. This will be useful in the case of UDP and provided checksum
to user space.

ip_cmsg_recv is an inline call to ip_cmsg_recv_offset with offset of
zero.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoip: Add offset parameter to ip_cmsg_recv
Tom Herbert [Mon, 5 Jan 2015 21:56:16 +0000 (13:56 -0800)]
ip: Add offset parameter to ip_cmsg_recv

Add ip_cmsg_recv_offset function which takes an offset argument
that indicates the starting offset in skb where data is being received
from. This will be useful in the case of UDP and provided checksum
to user space.

ip_cmsg_recv is an inline call to ip_cmsg_recv_offset with offset of
zero.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoip: IP cmsg cleanup
Tom Herbert [Mon, 5 Jan 2015 21:56:15 +0000 (13:56 -0800)]
ip: IP cmsg cleanup

Move the IP_CMSG_* constants from ip_sockglue.c to inet_sock.h so that
they can be referenced in other source files.

Restructure ip_cmsg_recv to not go through flags using shift, check
for flags by 'and'. This eliminates both the shift and a conditional
per flag check.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoip: Move checksum convert defines to inet
Tom Herbert [Mon, 5 Jan 2015 21:56:14 +0000 (13:56 -0800)]
ip: Move checksum convert defines to inet

Move convert_csum from udp_sock to inet_sock. This allows the
possibility that we can use convert checksum for different types
of sockets and also allows convert checksum to be enabled from
inet layer (what we'll want to do when enabling IP_CHECKSUM cmsg).

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonetlink: Warn on unordered or illegal nla_nest_cancel() or nlmsg_cancel()
Thomas Graf [Tue, 6 Jan 2015 00:04:21 +0000 (01:04 +0100)]
netlink: Warn on unordered or illegal nla_nest_cancel() or nlmsg_cancel()

Calling nla_nest_cancel() in a different order as the nesting was
built up can lead to negative offsets being calculated which
results in skb_trim() being called with an underflowed unsigned
int. Warn if mark < skb->data as it's definitely a bug.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'cxgb4-next'
David S. Miller [Mon, 5 Jan 2015 21:34:53 +0000 (16:34 -0500)]
Merge branch 'cxgb4-next'

Hariprasad Shenai says:

====================
RDMA/cxgb4/cxgb4vf/csiostor: Cleanup register defines

This series continues to cleanup all the macros/register defines related to
SGE, PCIE, MC, MA, TCAM, MAC, etc that are defined in t4_regs.h and the
affected files.

Will post another 1 or 2 series so that we can cover all the macros so that
they all follow the same style to be consistent.

The patches series is created against 'net-next' tree.
And includes patches on cxgb4, cxgb4vf, iw_cxgb4 and csiostor driver.

We have included all the maintainers of respective drivers. Kindly review the
change and let us know in case of any review comments.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agocxgb4/cxgb4vf/csiostor: Cleanup PL, XGMAC, SF and MC related register defines
Hariprasad Shenai [Mon, 5 Jan 2015 11:00:47 +0000 (16:30 +0530)]
cxgb4/cxgb4vf/csiostor: Cleanup PL, XGMAC, SF and MC related register defines

This patch cleanups all PL, XGMAC and SF related macros/register defines
that are defined in t4_regs.h and the affected files

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agocxgb4/csiostor: Cleanup TP, MPS and TCAM related register defines
Hariprasad Shenai [Mon, 5 Jan 2015 11:00:46 +0000 (16:30 +0530)]
cxgb4/csiostor: Cleanup TP, MPS and TCAM related register defines

This patch cleanups all TP, MPS and TCAM related macros/register defines
that are defined in t4_regs.h and the affected files

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agocxgb4/cxg4vf/csiostor: Cleanup MC, MA and CIM related register defines
Hariprasad Shenai [Mon, 5 Jan 2015 11:00:45 +0000 (16:30 +0530)]
cxgb4/cxg4vf/csiostor: Cleanup MC, MA and CIM related register defines

This patch cleanups all MC, MA and CIM related macros/register defines that are
defined in t4_regs.h and the affected files.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agocxgb4/cxgb4vf/csiostor: Cleanup SGE and PCI related register defines
Hariprasad Shenai [Mon, 5 Jan 2015 11:00:44 +0000 (16:30 +0530)]
cxgb4/cxgb4vf/csiostor: Cleanup SGE and PCI related register defines

This patch cleansup remaining SGE related macros/register defines and all PCI
related ones that are defined in t4_regs.h and the affected files.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoRDMA/cxgb4/cxgb4vf/csiostor: Cleanup SGE register defines
Hariprasad Shenai [Mon, 5 Jan 2015 11:00:43 +0000 (16:30 +0530)]
RDMA/cxgb4/cxgb4vf/csiostor: Cleanup SGE register defines

This patch cleanups all SGE related macros/register defines that are
defined in t4_regs.h and the affected files.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agobe2net: support TX batching using skb->xmit_more flag
Sathya Perla [Mon, 5 Jan 2015 10:48:34 +0000 (05:48 -0500)]
be2net: support TX batching using skb->xmit_more flag

This patch uses skb->xmit_more flag to batch TX requests.
TX is flushed either when xmit_more is false or there is
no more space in the TXQ.

Skyhawk-R and BEx chips require an even number of wrbs to be posted.
So, when a batch of TX requests is accumulated, the last header wrb
may need to be fixed with an extra dummy wrb.

This patch refactors be_xmit() routine as a sequence of be_xmit_enqueue()
and be_xmit_flush() calls. The Tx completion code is also
updated to be able to unmap/free a batch of skbs rather than a single
skb.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoat86rf230: Constify struct regmap_config
Krzysztof Kozlowski [Mon, 5 Jan 2015 09:02:31 +0000 (10:02 +0100)]
at86rf230: Constify struct regmap_config

The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agolist_nulls: fix missing header
Ying Xue [Sun, 4 Jan 2015 07:24:35 +0000 (15:24 +0800)]
list_nulls: fix missing header

Fixup below build error:

include/linux/list_nulls.h: In function ‘hlist_nulls_del’:
include/linux/list_nulls.h:84:13: error: ‘LIST_POISON2’ undeclared (first use in this function)

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: fix missing header
Ying Xue [Sun, 4 Jan 2015 07:25:09 +0000 (15:25 +0800)]
rhashtable: fix missing header

Fixup below build error:

include/linux/rhashtable.h: At top level:
include/linux/rhashtable.h:118:34: error: field ‘mutex’ has incomplete type

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoqlcnic: Fix dump_skb output
Joe Perches [Sun, 4 Jan 2015 01:50:16 +0000 (17:50 -0800)]
qlcnic: Fix dump_skb output

Use normal facilities to avoid printing each byte
on a separate line.

Now emits at KERN_DEBUG instead of KERN_INFO.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoenic: reconfigure resources for kdump crash kernel
Govindarajulu Varadarajan [Sat, 3 Jan 2015 14:05:44 +0000 (19:35 +0530)]
enic: reconfigure resources for kdump crash kernel

When running in kdump kernel, reduce number of resources used by the driver.
This will enable NIC to operate in low memory kdump kernel environment.

Also change the driver version to .83

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'geneve-next'
David S. Miller [Mon, 5 Jan 2015 03:21:39 +0000 (22:21 -0500)]
Merge branch 'geneve-next'

Jesse Gross says:

====================
Geneve Cleanups

Much of the basis for the Geneve code comes from VXLAN. However,
Geneve is quite a bit simpler than VXLAN and so this cleans up a
lot of the infrastruction - particularly around locking - where the
extra complexity is not necessary.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogeneve: Check family when reusing sockets.
Jesse Gross [Sat, 3 Jan 2015 02:26:05 +0000 (18:26 -0800)]
geneve: Check family when reusing sockets.

When searching for an existing socket to reuse, the address family
is not taken into account - only port number. This means that an
IPv4 socket could be used for IPv6 traffic and vice versa, which
is sure to cause problems when passing packets.

It is not possible to trigger this problem currently because the
only user of Geneve creates just IPv4 sockets. However, that is
likely to change in the near future.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogeneve: Remove socket hash table.
Jesse Gross [Sat, 3 Jan 2015 02:26:04 +0000 (18:26 -0800)]
geneve: Remove socket hash table.

The hash table for open Geneve ports is used only on creation and
deletion time. It is not performance critical and is not likely to
grow to a large number of items. Therefore, this can be changed
to use a simple linked list.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogeneve: Simplify locking.
Jesse Gross [Sat, 3 Jan 2015 02:26:03 +0000 (18:26 -0800)]
geneve: Simplify locking.

The existing Geneve locking scheme was pulled over directly from
VXLAN. However, VXLAN has a number of built in mechanisms which make
the locking more complex and are unlikely to be necessary with Geneve.
This simplifies the locking to use a basic scheme of a mutex
when doing updates plus RCU on receive.

In addition to making the code easier to read, this also avoids the
possibility of a race when creating or destroying sockets since
UDP sockets and the list of Geneve sockets are protected by different
locks. After this change, the entire operation is atomic.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogeneve: Remove workqueue.
Jesse Gross [Sat, 3 Jan 2015 02:26:02 +0000 (18:26 -0800)]
geneve: Remove workqueue.

The work queue is used only to free the UDP socket upon destruction.
This is not necessary with Geneve and generally makes the code more
difficult to reason about. It also introduces nondeterministic
behavior such as when a socket is rapidly deleted and recreated, which
could fail as the the deletion happens asynchronously.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'rhashtable-next'
David S. Miller [Sat, 3 Jan 2015 19:33:03 +0000 (14:33 -0500)]
Merge branch 'rhashtable-next'

Thomas Graf says:

====================
rhashtable: Per bucket locks & deferred table resizing

Prepares for and introduces per bucket spinlocks and deferred table
resizing. This allows for parallel table mutations in different hash
buckets from atomic context. The resizing occurs in the background
in a separate worker thread while lookups, inserts, and removals can
continue.

Also modified the chain linked list to be terminated with a special
nulls marker to allow entries to move between multiple lists.

Last but not least, reintroduces lockless netlink_lookup() with
deferred Netlink socket destruction to avoid the side effect of
increased netlink_release() runtime.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonetlink: Lockless lookup with RCU grace period in socket release
Thomas Graf [Fri, 2 Jan 2015 22:00:22 +0000 (23:00 +0100)]
netlink: Lockless lookup with RCU grace period in socket release

Defers the release of the socket reference using call_rcu() to
allow using an RCU read-side protected call to rhashtable_lookup()

This restores behaviour and performance gains as previously
introduced by e341694 ("netlink: Convert netlink_lookup() to use
RCU protected hash table") without the side effect of severely
delayed socket destruction.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Supports for nulls marker
Thomas Graf [Fri, 2 Jan 2015 22:00:21 +0000 (23:00 +0100)]
rhashtable: Supports for nulls marker

In order to allow for wider usage of rhashtable, use a special nulls
marker to terminate each chain. The reason for not using the existing
nulls_list is that the prev pointer usage would not be valid as entries
can be linked in two different buckets at the same time.

The 4 nulls base bits can be set through the rhashtable_params structure
like this:

struct rhashtable_params params = {
        [...]
        .nulls_base = (1U << RHT_BASE_SHIFT),
};

This reduces the hash length from 32 bits to 27 bits.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Per bucket locks & deferred expansion/shrinking
Thomas Graf [Fri, 2 Jan 2015 22:00:20 +0000 (23:00 +0100)]
rhashtable: Per bucket locks & deferred expansion/shrinking

Introduces an array of spinlocks to protect bucket mutations. The number
of spinlocks per CPU is configurable and selected based on the hash of
the bucket. This allows for parallel insertions and removals of entries
which do not share a lock.

The patch also defers expansion and shrinking to a worker queue which
allows insertion and removal from atomic context. Insertions and
deletions may occur in parallel to it and are only held up briefly
while the particular bucket is linked or unzipped.

Mutations of the bucket table pointer is protected by a new mutex, read
access is RCU protected.

In the event of an expansion or shrinking, the new bucket table allocated
is exposed as a so called future table as soon as the resize process
starts.  Lookups, deletions, and insertions will briefly use both tables.
The future table becomes the main table after an RCU grace period and
initial linking of the old to the new table was performed. Optimization
of the chains to make use of the new number of buckets follows only the
new table is in use.

The side effect of this is that during that RCU grace period, a bucket
traversal using any rht_for_each() variant on the main table will not see
any insertions performed during the RCU grace period which would at that
point land in the future table. The lookup will see them as it searches
both tables if needed.

Having multiple insertions and removals occur in parallel requires nelems
to become an atomic counter.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agospinlock: Add spin_lock_bh_nested()
Thomas Graf [Fri, 2 Jan 2015 22:00:19 +0000 (23:00 +0100)]
spinlock: Add spin_lock_bh_nested()

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonft_hash: Remove rhashtable_remove_pprev()
Thomas Graf [Fri, 2 Jan 2015 22:00:18 +0000 (23:00 +0100)]
nft_hash: Remove rhashtable_remove_pprev()

The removal function of nft_hash currently stores a reference to the
previous element during lookup which is used to optimize removal later
on. This was possible because a lock is held throughout calling
rhashtable_lookup() and rhashtable_remove().

With the introdution of deferred table resizing in parallel to lookups
and insertions, the nftables lock will no longer synchronize all
table mutations and the stored pprev may become invalid.

Removing this optimization makes removal slightly more expensive on
average but allows taking the resize cost out of the insert and
remove path.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Cc: netfilter-devel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Factor out bucket_tail() function
Thomas Graf [Fri, 2 Jan 2015 22:00:17 +0000 (23:00 +0100)]
rhashtable: Factor out bucket_tail() function

Subsequent patches will require access to the bucket tail. Access
to the tail is relatively cheap as the automatic resizing of the
table should keep the number of entries per bucket to no more
than 0.75 on average.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Convert bucket iterators to take table and index
Thomas Graf [Fri, 2 Jan 2015 22:00:16 +0000 (23:00 +0100)]
rhashtable: Convert bucket iterators to take table and index

This patch is in preparation to introduce per bucket spinlocks. It
extends all iterator macros to take the bucket table and bucket
index. It also introduces a new rht_dereference_bucket() to
handle protected accesses to buckets.

It introduces a barrier() to the RCU iterators to the prevent
the compiler from caching the first element.

The lockdep verifier is introduced as stub which always succeeds
and properly implement in the next patch when the locks are
introduced.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Use rht_obj() instead of manual offset calculation
Thomas Graf [Fri, 2 Jan 2015 22:00:15 +0000 (23:00 +0100)]
rhashtable: Use rht_obj() instead of manual offset calculation

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Do hashing inside of rhashtable_lookup_compare()
Thomas Graf [Fri, 2 Jan 2015 22:00:14 +0000 (23:00 +0100)]
rhashtable: Do hashing inside of rhashtable_lookup_compare()

Hash the key inside of rhashtable_lookup_compare() like
rhashtable_lookup() does. This allows to simplify the hashing
functions and keep them private.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Cc: netfilter-devel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'timecounter-next'
David S. Miller [Fri, 2 Jan 2015 21:47:51 +0000 (16:47 -0500)]
Merge branch 'timecounter-next'

Richard Cochran says:

====================
Fixing the "Time Counter fixes and improvements"

For this series I had only tested the build with ARCH=x86 and arm, but
others like sparc64, microblaze, powerpc, and s390 will fail because
they somehow don't indirectly include clocksource.h for the drivers in
question.

This series fixes the build issues reported by:
 kbuild test robot <fengguang.wu@intel.com>
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agomicroblaze: include the new timecounter header.
Richard Cochran [Fri, 2 Jan 2015 19:22:09 +0000 (20:22 +0100)]
microblaze: include the new timecounter header.

The timecounter/cyclecounter code has moved, so users need the new include.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agomlx4: include clocksource.h again
Richard Cochran [Fri, 2 Jan 2015 19:22:08 +0000 (20:22 +0100)]
mlx4: include clocksource.h again

This driver uses the function, clocksource_khz2mult, and so it really must
include clocksource.h.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoixgbe: convert to CYCLECOUNTER_MASK macro.
Richard Cochran [Fri, 2 Jan 2015 19:22:07 +0000 (20:22 +0100)]
ixgbe: convert to CYCLECOUNTER_MASK macro.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoigb: convert to CYCLECOUNTER_MASK macro.
Richard Cochran [Fri, 2 Jan 2015 19:22:06 +0000 (20:22 +0100)]
igb: convert to CYCLECOUNTER_MASK macro.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoe1000e: convert to CYCLECOUNTER_MASK macro.
Richard Cochran [Fri, 2 Jan 2015 19:22:05 +0000 (20:22 +0100)]
e1000e: convert to CYCLECOUNTER_MASK macro.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agobnx2x: convert to CYCLECOUNTER_MASK macro.
Richard Cochran [Fri, 2 Jan 2015 19:22:04 +0000 (20:22 +0100)]
bnx2x: convert to CYCLECOUNTER_MASK macro.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotimecounter: provide a macro to initialize the cyclecounter mask field.
Richard Cochran [Fri, 2 Jan 2015 19:22:03 +0000 (20:22 +0100)]
timecounter: provide a macro to initialize the cyclecounter mask field.

There is no need for users of the timecounter/cyclecounter code to include
clocksource.h just for a single macro.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMAINTAINERS: Update Open vSwitch entry.
Pravin B Shelar [Fri, 2 Jan 2015 19:18:21 +0000 (11:18 -0800)]
MAINTAINERS: Update Open vSwitch entry.

OVS development is moved to netdev mailing list. Update tree and
list in MAINTAINERS file.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge tag 'wireless-drivers-next-for-davem-2015-01-02' of git://git.kernel.org/pub...
David S. Miller [Fri, 2 Jan 2015 21:40:44 +0000 (16:40 -0500)]
Merge tag 'wireless-drivers-next-for-davem-2015-01-02' of git://git./linux/kernel/git/kvalo/wireless-drivers-next

Changes:

* ath9k: enable Transmit Power Control (TPC) for ar9003 chips

* rtlwifi: cleanup and updates from the vendor driver

* rsi: fix memory leak related to firmware image

* ath: parameter fix for FCC DFS pattern

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: ethernet: cisco: enic: enic_dev: Remove some unused functions
Rickard Strandqvist [Fri, 2 Jan 2015 20:29:24 +0000 (21:29 +0100)]
net: ethernet: cisco: enic: enic_dev: Remove some unused functions

Removes some functions that are not used anywhere:
enic_dev_enable2_done() enic_dev_enable2() enic_dev_deinit_done()
enic_dev_init_prov2() enic_vnic_dev_deinit()

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoisdn: hisax: hfc4s8s_l1: Remove some unused functions
Rickard Strandqvist [Thu, 1 Jan 2015 19:17:22 +0000 (20:17 +0100)]
isdn: hisax: hfc4s8s_l1: Remove some unused functions

Removes some functions that are not used anywhere:
Read_hfc32() Write_hfc32() Write_hfc16()

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: fddi: skfp: smt.c: Remove unused function
Rickard Strandqvist [Thu, 1 Jan 2015 17:01:26 +0000 (18:01 +0100)]
net: fddi: skfp: smt.c: Remove unused function

Remove the function smt_ifconfig() that is not used anywhere.

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: ethernet: chelsio: cxgb3: mc5.c: Remove some unused functions
Rickard Strandqvist [Thu, 1 Jan 2015 16:49:55 +0000 (17:49 +0100)]
net: ethernet: chelsio: cxgb3: mc5.c: Remove some unused functions

Removes some functions that are not used anywhere:
dbgi_rd_rsp3() dbgi_wr_addr3()

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: skbuff: don't zero tc members when freeing skb
Florian Westphal [Wed, 31 Dec 2014 12:33:41 +0000 (13:33 +0100)]
net: skbuff: don't zero tc members when freeing skb

Not needed, only four cases:
 - kfree_skb (or one of its aliases).
   Don't need to zero, memory will be freed.
 - kfree_skb_partial and head was stolen:  memory will be freed.
 - skb_morph:  The skb header fields (including tc ones) will be
   copied over from the 'to-be-morphed' skb right after
   skb_release_head_state returns.
 - skb_segment:  Same as before, all the skb header
   fields are copied over from the original skb right away.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Fri, 2 Jan 2015 20:58:21 +0000 (15:58 -0500)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg say:

====================
pull request: bluetooth-next 2014-12-31

Here's the first batch of bluetooth patches for 3.20.

 - Cleanups & fixes to ieee802154  drivers
 - Fix synchronization of mgmt commands with respective HCI commands
 - Add self-tests for LE pairing crypto functionality
 - Remove 'BlueFritz!' specific handling from core using a new quirk flag
 - Public address configuration support for ath3012
 - Refactor debugfs support into a dedicated file
 - Initial support for LE Data Length Extension feature from Bluetooth 4.2

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogeneve: Add Geneve GRO support
Joe Stringer [Wed, 31 Dec 2014 03:10:16 +0000 (19:10 -0800)]
geneve: Add Geneve GRO support

This results in an approximately 30% increase in throughput
when handling encapsulated bulk traffic.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: Add Transparent Ethernet Bridging GRO support.
Jesse Gross [Wed, 31 Dec 2014 03:10:15 +0000 (19:10 -0800)]
net: Add Transparent Ethernet Bridging GRO support.

Currently the only tunnel protocol that supports GRO with encapsulated
Ethernet is VXLAN. This pulls out the Ethernet code into a proper layer
so that it can be used by other tunnel protocols such as GRE and Geneve.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet/fsl: remove hardcoded clock setting from xgmac_mdio
Shaohui Xie [Tue, 30 Dec 2014 08:28:21 +0000 (16:28 +0800)]
net/fsl: remove hardcoded clock setting from xgmac_mdio

There is no need to set the clock speed in read/write which will be performed
unnecessarily for each mdio access. Init it during probe is enough.

Also, the hardcoded clock value is not a proper way for all SoCs.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet/fsl: remove irq assignment from xgmac_mdio
Shaohui Xie [Tue, 30 Dec 2014 08:28:00 +0000 (16:28 +0800)]
net/fsl: remove irq assignment from xgmac_mdio

Which is wrong and not used, so no extra space needed by
mdiobus_alloc_size(), use mdiobus_alloc() instead.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet/fsl: remove reset from xgmac_mdio
Shaohui Xie [Tue, 30 Dec 2014 08:27:33 +0000 (16:27 +0800)]
net/fsl: remove reset from xgmac_mdio

Since the reset is just clock setting, individual mdio reset is
not available.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'gmac-next'
David S. Miller [Thu, 1 Jan 2015 00:14:52 +0000 (19:14 -0500)]
Merge branch 'gmac-next'

Roger Chen says:

====================
support GMAC driver for RK3288

Roger Chen (6):
  patch1: add driver for Rockchip RK3288 SoCs integrated GMAC
  patch2: define clock ID used for GMAC
  patch3: modify CRU config for Rockchip RK3288 SoCs integrated GMAC
  patch4: dts: rockchip: add gmac info for rk3288
  patch5: dts: rockchip: enable gmac on RK3288 evb board
  patch6: add document for Rockchip RK3288 GMAC

Tested on rk3288 evb board:
Execute the following command to enable ethernet,
set local IP and ping a remote host.

busybox ifconfig eth0 up
busybox ifconfig eth0 192.168.1.111
ping 192.168.1.1
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoGMAC: add document for Rockchip RK3288 GMAC
Roger Chen [Mon, 29 Dec 2014 09:44:34 +0000 (17:44 +0800)]
GMAC: add document for Rockchip RK3288 GMAC

The document descripts how to add properties for GMAC in device tree.

change since v2:

1. remove power-gpio, reset-gpio, phyirq-gpio, pmu_regulator setting
2. add "snps,reset-gpio", "snps,reset-active-low;" "snps,reset-delays-us"

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoARM: dts: rockchip: enable gmac on RK3288 evb board
Roger Chen [Mon, 29 Dec 2014 09:44:25 +0000 (17:44 +0800)]
ARM: dts: rockchip: enable gmac on RK3288 evb board

enable gmac in rk3288-evb-rk808.dts

changes since v2:
1. add fixed regulator for PHY
2. remove power-gpio, reset-gpio, phyirq-gpio, pmu_regulator setting
3. add "snps,reset-gpio", "snps,reset-active-low;" "snps,reset-delays-us"

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoARM: dts: rockchip: add gmac info for rk3288
Roger Chen [Mon, 29 Dec 2014 09:44:16 +0000 (17:44 +0800)]
ARM: dts: rockchip: add gmac info for rk3288

add gmac info in rk3288.dtsi for GMAC driver

changes since v2:
1. add drive-strength in the pinctrl settings

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoGMAC: modify CRU config for Rockchip RK3288 SoCs integrated GMAC
Roger Chen [Mon, 29 Dec 2014 09:44:07 +0000 (17:44 +0800)]
GMAC: modify CRU config for Rockchip RK3288 SoCs integrated GMAC

modify CRU config for GMAC driver

changes since v2:
1. remove SCLK_MAC_PLL

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoGMAC: define clock ID used for GMAC
Roger Chen [Mon, 29 Dec 2014 09:43:55 +0000 (17:43 +0800)]
GMAC: define clock ID used for GMAC

changes since v2:
1. remove SCLK_MAC_PLL

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoGMAC: add driver for Rockchip RK3288 SoCs integrated GMAC
Roger Chen [Mon, 29 Dec 2014 09:43:36 +0000 (17:43 +0800)]
GMAC: add driver for Rockchip RK3288 SoCs integrated GMAC

This driver is based on stmmac driver.

changes since v2:
- use tab instead of space for macros
- use HIWORD_UPDATE macro for GMAC_CLK_RX_DL_CFG and GMAC_CLK_TX_DL_CFG
- remove drive-strength setting in the driver and set it in the pinctrl settings
- use dev_err instead of pr_err
- remove clock names's macros, just use the real name of the clock
- use devm_clk_get() instead of clk_get()
- remove clk_set_parent(bsp_priv->clk_mac, bsp_priv->clk_mac_pll)
- remove gpio setting for LDO, just use regulator API
- remove phy reset using gpio in the glue layer, it has been handled in the stmmac driver
- remove handling phy interrupt (mii interrupt)

changes since v1:
- use BIT() to set register
- combine two remap_write() operations into one for the same register
- use macros for register value setting
- remove grf fail check in rk_gmac_setup() and save all the check in set_rgmii_speed()
- remove .tx_coe=1 in rk_gmac_data

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoigb_ptp: Include clocksource.h to get CLOCKSOURCE_MASK.
David S. Miller [Wed, 31 Dec 2014 23:32:40 +0000 (18:32 -0500)]
igb_ptp: Include clocksource.h to get CLOCKSOURCE_MASK.

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoe1000e: Include clocksource.h to get CLOCKSOURCE_MASK.
David S. Miller [Wed, 31 Dec 2014 23:32:25 +0000 (18:32 -0500)]
e1000e: Include clocksource.h to get CLOCKSOURCE_MASK.

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'fib_trie-next'
David S. Miller [Wed, 31 Dec 2014 23:26:02 +0000 (18:26 -0500)]
Merge branch 'fib_trie-next'

Alexander Duyck says:

====================
fib_trie: Reduce time spent in fib_table_lookup by 35 to 75%

These patches are meant to address several performance issues I have seen
in the fib_trie implementation, and fib_table_lookup specifically.  With
these changes in place I have seen a reduction of up to 35 to 75% for the
total time spent in fib_table_lookup depending on the type of search being
performed.

On a VM running in my Corei7-4930K system with a trie of maximum depth of 7
this resulted in a reduction of over 370ns per packet in the total time to
process packets received from an ixgbe interface and route them to a dummy
interface.  This represents a failed lookup in the local trie followed by
a successful search in the main trie.

Baseline Refactor
  ixgbe->dummy routing 1.20Mpps 2.21Mpps
  ------------------------------------------------------------
  processing time per packet 835ns 453ns
  fib_table_lookup 50.1% 418ns 25.0% 113ns
  check_leaf.isra.9  7.9%  66ns    --  --
  ixgbe_clean_rx_irq  5.3%  44ns  9.8%  44ns
  ip_route_input_noref  2.9%  25ns  4.6%  21ns
  pvclock_clocksource_read  2.6%  21ns  4.6%  21ns
  ip_rcv  2.6%  22ns  4.0%  18ns

In the simple case of receiving a frame and dropping it before it can reach
the socket layer I saw a reduction of 40ns per packet.  This represents a
trip through the local trie with the correct leaf found with no need for
any backtracing.

Baseline Refactor
  ixgbe->local receive 2.65Mpps 2.96Mpps
  ------------------------------------------------------------
  processing time per packet 377ns 337ns
  fib_table_lookup 25.1%  95ns 25.8%  87ns
  ixgbe_clean_rx_irq  8.7%  33ns  9.0%  30ns
  check_leaf.isra.9  7.2%  27ns    --  --
  ip_rcv  5.7%  21ns  6.5%  22ns

These changes have resulted in several functions being inlined such as
check_leaf and fib_find_node, but due to the code simplification the
overall size of the code has been reduced.

   text    data     bss     dec     hex filename
  16932     376      16   17324    43ac net/ipv4/fib_trie.o - before
  15259     376       8   15643    3d1b net/ipv4/fib_trie.o - after

Changes since RFC:
  Replaced this_cpu_ptr with correct call to this_cpu_inc in patch 1
  Changed test for leaf_info mismatch to (key ^ n->key) & li->mask_plen in patch 10
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Add tracking value for suffix length
Alexander Duyck [Wed, 31 Dec 2014 18:57:08 +0000 (10:57 -0800)]
fib_trie: Add tracking value for suffix length

This change adds a tracking value for the maximum suffix length of all
prefixes stored in any given tnode.  With this value we can determine if we
need to backtrace or not based on if the suffix is greater than the pos
value.

By doing this we can reduce the CPU overhead for lookups in the local table
as many of the prefixes there are 32b long and have a suffix length of 0
meaning we can immediately backtrace to the root node without needing to
test any of the nodes between it and where we ended up.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Remove checks for index >= tnode_child_length from tnode_get_child
Alexander Duyck [Wed, 31 Dec 2014 18:57:02 +0000 (10:57 -0800)]
fib_trie: Remove checks for index >= tnode_child_length from tnode_get_child

For some reason the compiler doesn't seem to understand that when we are in
a loop that runs from tnode_child_length - 1 to 0 we don't expect the value
of tn->bits to change.  As such every call to tnode_get_child was rerunning
tnode_chile_length which ended up consuming quite a bit of space in the
resultant assembly code.

I have gone though and verified that in all cases where tnode_get_child
is used we are either winding though a fixed loop from tnode_child_length -
1 to 0, or are in a fastpath case where we are verifying the value by
either checking for any remaining bits after shifting index by bits and
testing for leaf, or by using tnode_child_length.

size net/ipv4/fib_trie.o
Before:
   text    data     bss     dec     hex filename
  15506     376       8   15890    3e12 net/ipv4/fib_trie.o

After:
   text    data     bss     dec     hex filename
  14827     376       8   15211    3b6b net/ipv4/fib_trie.o

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: inflate/halve nodes in a more RCU friendly way
Alexander Duyck [Wed, 31 Dec 2014 18:56:55 +0000 (10:56 -0800)]
fib_trie: inflate/halve nodes in a more RCU friendly way

This change pulls the node_set_parent functionality out of put_child_reorg
and instead leaves that to the function to take care of as well.  By doing
this we can fully construct the new cluster of tnodes and all of the
pointers out of it before we start routing pointers into it.

I am suspecting this will likely fix some concurency issues though I don't
have a good test to show as such.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Push tnode flushing down to inflate/halve
Alexander Duyck [Wed, 31 Dec 2014 18:56:49 +0000 (10:56 -0800)]
fib_trie: Push tnode flushing down to inflate/halve

This change pushes the tnode freeing down into the inflate and halve
functions.  It makes more sense here as we have a better grasp of what is
going on and when a given cluster of nodes is ready to be freed.

I believe this may address a bug in the freeing logic as well.  For some
reason if the freelist got to a certain size we would call
synchronize_rcu().  I'm assuming that what they meant to do is call
synchronize_rcu() after they had handed off that much memory via
call_rcu().  As such that is what I have updated the behavior to be.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Push assignment of child to parent down into inflate/halve
Alexander Duyck [Wed, 31 Dec 2014 18:56:43 +0000 (10:56 -0800)]
fib_trie: Push assignment of child to parent down into inflate/halve

This change makes it so that the assignment of the tnode to the parent is
handled directly within whatever function is currently handling the node be
it inflate, halve, or resize.  By doing this we can avoid some of the need
to set NULL pointers in the tree while we are resizing the subnodes.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Add functions should_inflate and should_halve
Alexander Duyck [Wed, 31 Dec 2014 18:56:37 +0000 (10:56 -0800)]
fib_trie: Add functions should_inflate and should_halve

This change pulls the logic for if we should inflate/halve the nodes out
into separate functions.  It also addresses what I believe is a bug where 1
full node is all that is needed to keep a node from ever being halved.

Simple script to reproduce the issue:
modprobe dummy; ifconfig dummy0 up
for i in `seq 0 255`; do ifconfig dummy0:$i 10.0.${i}.1/24 up; done
ifconfig dummy0:256 10.0.255.33/16 up
for i in `seq 0 254`; do ifconfig dummy0:$i down; done

Results from /proc/net/fib_triestat
Before:
Local:
Aver depth:     3.00
Max depth:      4
Leaves:         17
Prefixes:       18
Internal nodes: 11
  1: 8  2: 2  10: 1
Pointers: 1048
Null ptrs: 1021
Total size: 11  kB
After:
Local:
Aver depth:     3.41
Max depth:      5
Leaves:         17
Prefixes:       18
Internal nodes: 12
  1: 8  2: 3  3: 1
Pointers: 36
Null ptrs: 8
Total size: 3  kB

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Move resize to after inflate/halve
Alexander Duyck [Wed, 31 Dec 2014 18:56:31 +0000 (10:56 -0800)]
fib_trie: Move resize to after inflate/halve

This change consists of a cut/paste of resize to behind inflate and halve
so that I could remove the two function prototypes.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Push rcu_read_lock/unlock to callers
Alexander Duyck [Wed, 31 Dec 2014 18:56:24 +0000 (10:56 -0800)]
fib_trie: Push rcu_read_lock/unlock to callers

This change is to start cleaning up some of the rcu_read_lock/unlock
handling.  I realized while reviewing the code there are several spots that
I don't believe are being handled correctly or are masking warnings by
locally calling rcu_read_lock/unlock instead of calling them at the correct
level.

A common example is a call to fib_get_table followed by fib_table_lookup.
The rcu_read_lock/unlock ought to wrap both but there are several spots where
they were not wrapped.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Use unsigned long for anything dealing with a shift by bits
Alexander Duyck [Wed, 31 Dec 2014 18:56:18 +0000 (10:56 -0800)]
fib_trie: Use unsigned long for anything dealing with a shift by bits

This change makes it so that anything that can be shifted by, or compared
to a value shifted by bits is updated to be an unsigned long.  This is
mostly a precaution against an insanely huge address space that somehow
starts coming close to the 2^32 root node size which would require
something like 1.5 billion addresses.

I chose unsigned long instead of unsigned long long since I do not believe
it is possible to allocate a 32 bit tnode on a 32 bit system as the memory
consumed would be 16GB + 28B which exceeds the addressible space for any
one process.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Update meaning of pos to represent unchecked bits
Alexander Duyck [Wed, 31 Dec 2014 18:56:12 +0000 (10:56 -0800)]
fib_trie: Update meaning of pos to represent unchecked bits

This change moves the pos value to the other side of the "bits" field.  By
doing this it actually simplifies a significant amount of code in the trie.

For example when halving a tree we know that the bit lost exists at
oldnode->pos, and if we inflate the tree the new bit being add is at
tn->pos.  Previously to find those bits you would have to subtract pos and
bits from the keylength or start with a value of (1 << 31) and then shift
that.

There are a number of spots throughout the code that benefit from this.  In
the case of the hot-path searches the main advantage is that we can drop 2
or more operations from the search path as we no longer need to compute the
value for the index to be shifted by and can instead just use the raw pos
value.

In addition the tkey_extract_bits is now defunct and can be replaced by
get_index since the two operations were doing the same thing, but now
get_index does it much more quickly as it is only an xor and shift versus a
pair of shifts and a subtraction.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Optimize fib_table_insert
Alexander Duyck [Wed, 31 Dec 2014 18:56:06 +0000 (10:56 -0800)]
fib_trie: Optimize fib_table_insert

This patch updates the fib_table_insert function to take advantage of the
changes made to improve the performance of fib_table_lookup.  As a result
the code should be smaller and run faster then the original.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Optimize fib_find_node
Alexander Duyck [Wed, 31 Dec 2014 18:56:00 +0000 (10:56 -0800)]
fib_trie: Optimize fib_find_node

This patch makes use of the same features I made use of for
fib_table_lookup to streamline fib_find_node.  The resultant code should be
smaller and run faster than the original.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Optimize fib_table_lookup to avoid wasting time on loops/variables
Alexander Duyck [Wed, 31 Dec 2014 18:55:54 +0000 (10:55 -0800)]
fib_trie: Optimize fib_table_lookup to avoid wasting time on loops/variables

This patch is meant to reduce the complexity of fib_table_lookup by reducing
the number of variables to the bare minimum while still keeping the same if
not improved functionality versus the original.

Most of this change was started off by the desire to rid the function of
chopped_off and current_prefix_length as they actually added very little to
the function since they only applied when computing the cindex.  I was able
to replace them mostly with just a check for the prefix match.  As long as
the prefix between the key and the node being tested was the same we know
we can search the tnode fully versus just testing cindex 0.

The second portion of the change ended up being a massive reordering.
Originally the calls to check_leaf were up near the start of the loop, and
the backtracing and descending into lower levels of tnodes was later.  This
didn't make much sense as the structure of the tree means the leaves are
always the last thing to be tested.  As such I reordered things so that we
instead have a loop that will delve into the tree and only exit when we
have either found a leaf or we have exhausted the tree.  The advantage of
rearranging things like this is that we can fully inline check_leaf since
there is now only one reference to it in the function.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Merge leaf into tnode
Alexander Duyck [Wed, 31 Dec 2014 18:55:47 +0000 (10:55 -0800)]
fib_trie: Merge leaf into tnode

This change makes it so that leaf and tnode are the same struct.  As a
result there is no need for rt_trie_node anymore since everyting can be
merged into tnode.

On 32b systems this results in the leaf being 4 bytes larger, however I
don't know if that is really an issue as this and an eariler patch that
added bits & pos have increased the size from 20 to 28.  If I am not
mistaken slub/slab allocate on power of 2 sizes so 20 was likely being
rounded up to 32 anyway.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Merge tnode_free and leaf_free into node_free
Alexander Duyck [Wed, 31 Dec 2014 18:55:41 +0000 (10:55 -0800)]
fib_trie: Merge tnode_free and leaf_free into node_free

Both the leaf and the tnode had an rcu_head in them, but they had them in
slightly different places.  Since we now have them in the same spot and
know that any node with bits == 0 is a leaf and the rest are either vmalloc
or kmalloc tnodes depending on the value of bits it makes it easy to combine
the functions and reduce overhead.

In addition I have taken advantage of the rcu_head pointer to go ahead and
put together a simple linked list instead of using the tnode pointer as
this way we can merge either type of structure for freeing.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Make leaf and tnode more uniform
Alexander Duyck [Wed, 31 Dec 2014 18:55:35 +0000 (10:55 -0800)]
fib_trie: Make leaf and tnode more uniform

This change makes some fundamental changes to the way leaves and tnodes are
constructed.  The big differences are:
1.  Leaves now populate pos and bits indicating their full key size.
2.  Trie nodes now mask out their lower bits to be consistent with the leaf
3.  Both structures have been reordered so that rt_trie_node now consisists
    of a much larger region including the pos, bits, and rcu portions of
    the tnode structure.

On 32b systems this will result in the leaf being 4B larger as the pos and
bits values were added to a hole created by the key as it was only 4B in
length.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Update usage stats to be percpu instead of global variables
Alexander Duyck [Wed, 31 Dec 2014 18:55:29 +0000 (10:55 -0800)]
fib_trie: Update usage stats to be percpu instead of global variables

The trie usage stats were currently being shared by all threads that were
calling fib_table_lookup.  As a result when multiple threads were
performing lookups simultaneously the trie would begin to cache bounce
between those threads.

In order to prevent this I have updated the usage stats to use a set of
percpu variables.  By doing this we should be able to avoid the cache
bouncing and still make use of these stats.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogre: allow live address change
stephen hemminger [Sat, 27 Dec 2014 18:01:42 +0000 (10:01 -0800)]
gre: allow live address change

The GRE tap device supports Ethernet over GRE, but doesn't
care about the source address of the tunnel, therefore it
can be changed without bring device down.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agol2tp : multicast notification to the registered listeners
Bill Hong [Sat, 27 Dec 2014 18:12:39 +0000 (10:12 -0800)]
l2tp : multicast notification to the registered listeners

Previously l2tp module did not provide any means for the user space to
get notified when tunnels/sessions are added/modified/deleted.
This change contains the following
- create a multicast group for the listeners to register.
- notify the registered listeners when the tunnels/sessions are
  created/modified/deleted.

Signed-off-by: Bill Hong <bhong@brocade.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Sven-Thorsten Dietrich <sven@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotun: return proper error code from tun_do_read
Alex Gartrell [Fri, 26 Dec 2014 07:22:49 +0000 (23:22 -0800)]
tun: return proper error code from tun_do_read

Instead of -1 with EAGAIN, read on a O_NONBLOCK tun fd will return 0.  This
fixes this by properly returning the error code from __skb_recv_datagram.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotun: Fixed unsigned/signed comparison
Alex Gartrell [Fri, 26 Dec 2014 07:05:03 +0000 (23:05 -0800)]
tun: Fixed unsigned/signed comparison

Validated that this was actually using the unsigned comparison with gdb.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: replace 0 by NULL for pointers
Fabian Frederick [Thu, 25 Dec 2014 11:05:50 +0000 (12:05 +0100)]
tipc: replace 0 by NULL for pointers

Fix sparse warning:
net/tipc/link.c:1924:40: warning: Using plain integer as NULL pointer

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'enic-next'
David S. Miller [Wed, 31 Dec 2014 18:08:54 +0000 (13:08 -0500)]
Merge branch 'enic-next'

Govindarajulu Varadarajan says:

====================
enic: Check for DMA mapping error

After dma mapping the buffers, enic does not call dma_mapping_error() to check
if mapping is successful.

This series fixes the issue by checking return value of pci_dma_mapping_error()
after pci_map_single().

This is reported by redhat here
https://bugzilla.redhat.com/show_bug.cgi?id=1145016
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoenic: add stats for dma mapping error
Govindarajulu Varadarajan [Wed, 24 Dec 2014 10:29:38 +0000 (15:59 +0530)]
enic: add stats for dma mapping error

This patch adds generic statistics for enic. As of now dma_map_error is the only
member. dma_map_erro is incremented every time dma maping error happens.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoenic: check dma_mapping_error
Govindarajulu Varadarajan [Wed, 24 Dec 2014 10:29:37 +0000 (15:59 +0530)]
enic: check dma_mapping_error

This patch checks for pci_dma_mapping_error() after dma mapping the data.
If the dma mapping fails we remove the previously queued frags and return
NETDEV_TX_OK.

Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoenic: make vnic_wq_buf doubly linked
Govindarajulu Varadarajan [Wed, 24 Dec 2014 10:29:36 +0000 (15:59 +0530)]
enic: make vnic_wq_buf doubly linked

This patch makes vnic_wq_buf doubly liked list. This is needed for dma_mapping
error check, in case some frag's dma map fails, we need to move back and remove
previously queued buffers.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'fec-next'
David S. Miller [Wed, 31 Dec 2014 18:06:57 +0000 (13:06 -0500)]
Merge branch 'fec-next'

Fugang Duan says:

====================
net: fec: add Wake-on-LAN support

The patch series enable FEC Wake-on-LAN feature for i.MX6q/dl and i.MX6SX SOCs.
FEC HW support sleep mode, when system in suspend status with FEC all clock gate
off, magic packet can wake up system. For different SOCs, there have special SOC
GPR register to let FEC enter sleep mode or exit sleep mode, add these to platform
callback for driver' call.

Patch#1: add WOL interface supports.
Patch#2: add SOC special sleep of/off operations for driver's sleep callback.
Patch#3: add magic pattern support for devicetree.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoARM: dts: imx6qdl: enable FEC magic-packet feature
Nimrod Andy [Wed, 24 Dec 2014 09:30:41 +0000 (17:30 +0800)]
ARM: dts: imx6qdl: enable FEC magic-packet feature

Add FEC magic-packet feature support.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoARM: imx: add FEC sleep mode callback function
Nimrod Andy [Wed, 24 Dec 2014 09:30:40 +0000 (17:30 +0800)]
ARM: imx: add FEC sleep mode callback function

i.MX6q/dl, i.MX6SX SOCs enet support sleep mode that magic packet can
wake up system in suspend status. For different SOCs, there have some
SOC specifical GPR register to set sleep on/off mode. So add these to
callback function for driver.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: fec: add Wake-on-LAN support
Nimrod Andy [Wed, 24 Dec 2014 09:30:39 +0000 (17:30 +0800)]
net: fec: add Wake-on-LAN support

Support for Wake-on-LAN using Magic Packet. ENET IP supports sleep mode
in low power status, when system enter suspend status, Magic packet can
wake up system even if all SOC clocks are gate. The patch doing below things:
- flagging the device as a wakeup source for the system, as well as
  its Wake-on-LAN interrupt
- prepare the hardware for entering WoL mode
- add standard ethtool WOL interface
- enable the ENET interrupt to wake us

Tested on i.MX6q/dl sabresd, sabreauto boards, i.MX6SX arm2 boards.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: gianfar: add missing __iomem annotation
Kevin Hao [Wed, 24 Dec 2014 06:05:45 +0000 (14:05 +0800)]
net: gianfar: add missing __iomem annotation

Fix the following spare warning:
drivers/net/ethernet/freescale/gianfar.c:3521:60: warning: incorrect type in argument 1 (different address spaces)
drivers/net/ethernet/freescale/gianfar.c:3521:60:    expected unsigned int [noderef] <asn:2>*addr
drivers/net/ethernet/freescale/gianfar.c:3521:60:    got unsigned int [usertype] *rfbptr
drivers/net/ethernet/freescale/gianfar.c:205:16: warning: incorrect type in assignment (different address spaces)
drivers/net/ethernet/freescale/gianfar.c:205:16:    expected unsigned int [usertype] *rfbptr
drivers/net/ethernet/freescale/gianfar.c:205:16:    got unsigned int [noderef] <asn:2>*<noident>
drivers/net/ethernet/freescale/gianfar.c:2918:44: warning: incorrect type in argument 1 (different address spaces)
drivers/net/ethernet/freescale/gianfar.c:2918:44:    expected unsigned int [noderef] <asn:2>*addr
drivers/net/ethernet/freescale/gianfar.c:2918:44:    got unsigned int [usertype] *rfbptr

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: gianfar: mark the local functions static
Kevin Hao [Wed, 24 Dec 2014 06:05:44 +0000 (14:05 +0800)]
net: gianfar: mark the local functions static

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agovirtio-net: don't do header check for dodgy gso packets
Jason Wang [Wed, 24 Dec 2014 03:03:52 +0000 (11:03 +0800)]
virtio-net: don't do header check for dodgy gso packets

There's no need to do header check for virtio-net since:

- Host sets dodgy for all gso packets from guest and check the header.
- Host should be prepared for all kinds of evil packets from guest, since
  malicious guest can send any kinds of packet.

So this patch sets NETIF_F_GSO_ROBUST for virtio-net to skip the check.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoarm: sa1100: move irda header to linux/platform_data
Dmitry Eremin-Solenikov [Tue, 23 Dec 2014 22:14:14 +0000 (01:14 +0300)]
arm: sa1100: move irda header to linux/platform_data

In the end asm/mach/irda.h header is not used by anybody except sa1100.
Move the header to the platform data includes dir and rename it to
irda-sa11x0.h.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>