platform/kernel/linux-starfive.git
8 years agoskb_array: resize support
Michael S. Tsirkin [Mon, 13 Jun 2016 20:54:50 +0000 (23:54 +0300)]
skb_array: resize support

Update skb_array after ptr_ring API changes.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoptr_ring: resize support
Michael S. Tsirkin [Mon, 13 Jun 2016 20:54:45 +0000 (23:54 +0300)]
ptr_ring: resize support

This adds ring resize support. Seems to be necessary as
users such as tun allow userspace control over queue size.

If resize is used, this costs us ability to peek at queue without
consumer lock - should not be a big deal as peek and consumer are
usually run on the same CPU.

If ring is made bigger, ring contents is preserved.  If ring is made
smaller, extra pointers are passed to an optional destructor callback.

Cleanup function also gains destructor callback such that
all pointers in queue can be cleaned up.

This changes some APIs but we don't have any users yet,
so it won't break bisect.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoskb_array: array based FIFO for skbs
Michael S. Tsirkin [Mon, 13 Jun 2016 20:54:41 +0000 (23:54 +0300)]
skb_array: array based FIFO for skbs

A simple array based FIFO of pointers.  Intended for net stack so uses
skbs for type safety. Implemented as a set of wrappers around ptr_ring.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoptr_ring: ring test
Michael S. Tsirkin [Mon, 13 Jun 2016 20:54:36 +0000 (23:54 +0300)]
ptr_ring: ring test

Add ringtest based unit test for ptr ring.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoptr_ring: array based FIFO for pointers
Michael S. Tsirkin [Mon, 13 Jun 2016 20:54:31 +0000 (23:54 +0300)]
ptr_ring: array based FIFO for pointers

A simple array based FIFO of pointers.  Intended for net stack which
commonly has a single consumer/producer.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: make tcf_hash_check() boolean
WANG Cong [Mon, 13 Jun 2016 20:46:28 +0000 (13:46 -0700)]
net_sched: make tcf_hash_check() boolean

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'vrf-ipv6-mcast-link-local'
David S. Miller [Wed, 15 Jun 2016 19:34:34 +0000 (12:34 -0700)]
Merge branch 'vrf-ipv6-mcast-link-local'

David Ahern says:

====================
net: vrf: Handle ipv6 multicast and link-local addresses

IPv6 multicast and link-local addresses require special handling by the
VRF driver. Rather than using the VRF device index and full FIB lookups,
packets to/from these addresses should use direct FIB lookups based on
the VRF device table.

Multicast routes do not make sense for the L3 master device directly.
Accordingly, do not add mcast routes for the device, and the VRF driver
should fail attempts to send packets to ipv6 mcast addresses on the
device (e.g, ping6 ff02::1%<vrf> should fail)

With this change connections into and out of a VRF enslaved device work
for multicast and link-local addresses (icmp, tcp, and udp).  e.g.,

1. packets into VM with VRF config:
    ping6 -c3 fe80::e0:f9ff:fe1c:b974%br1
    ping6 -c3 ff02::1%br1
    ssh -6 fe80::e0:f9ff:fe1c:b974%br1

2. packets going out a VRF enslaved device:
    ping6 -c3 fe80::18f8:83ff:fe4b:7a2e%eth1
    ping6 -c3 ff02::1%eth1
    ssh -6 root@fe80::18f8:83ff:fe4b:7a2e%eth1
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: vrf: Handle ipv6 multicast and link-local addresses
David Ahern [Mon, 13 Jun 2016 20:44:19 +0000 (13:44 -0700)]
net: vrf: Handle ipv6 multicast and link-local addresses

IPv6 multicast and link-local addresses require special handling by the
VRF driver:
1. Rather than using the VRF device index and full FIB lookups,
   packets to/from these addresses should use direct FIB lookups based on
   the VRF device table.

2. fail sends/receives on a VRF device to/from a multicast address
   (e.g, make ping6 ff02::1%<vrf> fail)

3. move the setting of the flow oif to the first dst lookup and revert
   the change in icmpv6_echo_reply made in ca254490c8dfd ("net: Add VRF
   support to IPv6 stack"). Linklocal/mcast addresses require use of the
   skb->dev.

With this change connections into and out of a VRF enslaved device work
for multicast and link-local addresses work (icmp, tcp, and udp)
e.g.,

1. packets into VM with VRF config:
    ping6 -c3 fe80::e0:f9ff:fe1c:b974%br1
    ping6 -c3 ff02::1%br1

    ssh -6 fe80::e0:f9ff:fe1c:b974%br1

2. packets going out a VRF enslaved device:
    ping6 -c3 fe80::18f8:83ff:fe4b:7a2e%eth1
    ping6 -c3 ff02::1%eth1
    ssh -6 root@fe80::18f8:83ff:fe4b:7a2e%eth1

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ipv6: Do not add multicast route for l3 master devices
David Ahern [Mon, 13 Jun 2016 20:44:18 +0000 (13:44 -0700)]
net: ipv6: Do not add multicast route for l3 master devices

L3 master devices are virtual devices similar to the loopback
device. Link local and multicast routes for these devices do
not make sense. The ipv6 addrconf code already skips adding a
linklocal address; do the same for the mcast route.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: l3mdev: Remove const from flowi6 arg to get_rt6_dst
David Ahern [Mon, 13 Jun 2016 20:44:17 +0000 (13:44 -0700)]
net: l3mdev: Remove const from flowi6 arg to get_rt6_dst

Allow drivers to pass flow arg to functions where the arg is not const
and allow the driver to make updates as needed (eg., setting oif).

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'af_iucv-big-bufs'
David S. Miller [Wed, 15 Jun 2016 19:21:05 +0000 (12:21 -0700)]
Merge branch 'af_iucv-big-bufs'

Ursula Braun says:

====================
s390: af_iucv patches

here are improvements for af_iucv relaxing the pressure to allocate
big contiguous kernel buffers.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoaf_iucv: use paged SKBs for big inbound messages
Eugene Crosser [Mon, 13 Jun 2016 16:46:16 +0000 (18:46 +0200)]
af_iucv: use paged SKBs for big inbound messages

When an inbound message is bigger than a page, allocate a paged SKB,
and subsequently use IUCV receive primitive with IPBUFLST flag.
This relaxes the pressure to allocate big contiguous kernel buffers.

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoaf_iucv: remove fragment_skb() to use paged SKBs
Eugene Crosser [Mon, 13 Jun 2016 16:46:15 +0000 (18:46 +0200)]
af_iucv: remove fragment_skb() to use paged SKBs

Before introducing paged skbs in the receive path, get rid of the
function `iucv_fragment_skb()` that replaces one large linear skb
with several smaller linear skbs.

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoaf_iucv: use paged SKBs for big outbound messages
Eugene Crosser [Mon, 13 Jun 2016 16:46:14 +0000 (18:46 +0200)]
af_iucv: use paged SKBs for big outbound messages

When an outbound message is bigger than a page, allocate and fill
a paged SKB, and subsequently use IUCV send primitive with IPBUFLST
flag. This relaxes the pressure to allocate big contiguous kernel
buffers.

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodt: bindings: Add bindings for Cirrus Logic CS89x0 ethernet chip
Alexander Shiyan [Mon, 13 Jun 2016 15:52:17 +0000 (18:52 +0300)]
dt: bindings: Add bindings for Cirrus Logic CS89x0 ethernet chip

Add device tree binding documentation details for Cirrus Logic
CS8900/CS8920 ethernet chip.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: cx89x0: Add DT support
Alexander Shiyan [Mon, 13 Jun 2016 15:51:05 +0000 (18:51 +0300)]
net: cx89x0: Add DT support

Add DT support to the Cirrus Logic CS89x0 driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoact_police: rename tcf_act_police_locate() to tcf_act_police_init()
WANG Cong [Mon, 13 Jun 2016 17:47:44 +0000 (10:47 -0700)]
act_police: rename tcf_act_police_locate() to tcf_act_police_init()

This function is just ->init(), rename it to make it obvious.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: remove internal use of TC_POLICE_*
WANG Cong [Mon, 13 Jun 2016 17:47:43 +0000 (10:47 -0700)]
net_sched: remove internal use of TC_POLICE_*

These should be gone when we removed CONFIG_NET_CLS_POLICE.
We can not totally remove them since they are exposed
to userspace.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'rds-mprds-foundations'
David S. Miller [Wed, 15 Jun 2016 06:50:44 +0000 (23:50 -0700)]
Merge branch 'rds-mprds-foundations'

Sowmini Varadhan says:

====================
RDS: multiple connection paths for scaling

Today RDS-over-TCP is implemented by demux-ing multiple PF_RDS sockets
between any 2 endpoints (where endpoint == [IP address, port]) over a
single TCP socket between the 2 IP addresses involved. This has the
limitation that it ends up funneling multiple RDS flows over a single
TCP flow, thus the rds/tcp connection is
   (a) upper-bounded to the single-flow bandwidth,
   (b) suffers from head-of-line blocking for the RDS sockets.

Better throughput (for a fixed small packet size, MTU) can be achieved
by having multiple TCP/IP flows per rds/tcp connection, i.e., multipathed
RDS (mprds).  Each such TCP/IP flow constitutes a path for the rds/tcp
connection. RDS sockets will be attached to a path based on some hash
(e.g., of local address and RDS port number) and packets for that RDS
socket will be sent over the attached path using TCP to segment/reassemble
RDS datagrams on that path.

The table below, generated using a prototype that implements mprds,
shows that this is significant for scaling to 40G.  Packet sizes
used were: 8K byte req, 256 byte resp. MTU: 1500.  The parameters for
RDS-concurrency used below are described in the rds-stress(1) man page-
the number listed is proportional to the number of threads at which max
throughput was attained.

  -------------------------------------------------------------------
     RDS-concurrency   Num of       tx+rx K/s (iops)       throughput
     (-t N -d N)       TCP paths
  -------------------------------------------------------------------
        16             1             600K -  700K            4 Gbps
        28             8            5000K - 6000K           32 Gbps
  -------------------------------------------------------------------

FAQ: what is the relation between mprds and mptcp?
  mprds is orthogonal to mptcp. Whereas mptcp creates
  sub-flows for a single TCP connection, mprds parallelizes tx/rx
  at the RDS layer. MPRDS with N paths will allow N datagrams to
  be sent in parallel; each path will continue to send one
  datagram at a time, with sender and receiver keeping track of
  the retransmit and dgram-assembly state based on the RDS header.
  If desired, mptcp can additionally be used to speed up each TCP
  path. That acceleration is orthogonal to the parallelization benefits
  of mprds.

This patch series lays down the foundational data-structures to support
mprds in the kernel. It implements the changes to split up the
rds_connection structure into a common (to all paths) part,
and a per-path rds_conn_path. All I/O workqs are driven from
the rds_conn_path.

Note that this patchset does not (yet) actually enable multipathing
for any of the transports; all transports will continue to use a
single path with the refactored data-structures. A subsequent patchset
will  add the changes to the rds-tcp module to actually use mprds
in rds-tcp.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Update rds_conn_destroy to be MP capable
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:42 +0000 (09:44 -0700)]
RDS: Update rds_conn_destroy to be MP capable

Refactor rds_conn_destroy() so that the per-path dismantling
is done in rds_conn_path_destroy, and then iterate as needed
over rds_conn_path_destroy().

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Update rds_conn_shutdown to work with rds_conn_path
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:41 +0000 (09:44 -0700)]
RDS: Update rds_conn_shutdown to work with rds_conn_path

This commit changes rds_conn_shutdown to take a rds_conn_path *
argument, allowing it to shutdown paths other than c_path[0] for
MP-capable transports.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Initialize all RDS_MPATH_WORKERS in __rds_conn_create
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:40 +0000 (09:44 -0700)]
RDS: Initialize all RDS_MPATH_WORKERS in __rds_conn_create

Add a for() loop in __rds_conn_create to initialize all the
conn_paths, in preparate for MP capable transports.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Add rds_conn_path_error()
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:39 +0000 (09:44 -0700)]
RDS: Add rds_conn_path_error()

rds_conn_path_error() is the MP-aware analog of rds_conn_error,
to be used by multipath-capable callers.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: update rds-info related functions to traverse multiple conn_paths
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:38 +0000 (09:44 -0700)]
RDS: update rds-info related functions to traverse multiple conn_paths

This commit updates the callbacks related to the rds-info command
so that they walk through all the rds_conn_path structures and
report the requested info.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Add rds_conn_path_connect_if_down() for MP-aware callers
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:37 +0000 (09:44 -0700)]
RDS: Add rds_conn_path_connect_if_down() for MP-aware callers

rds_conn_path_connect_if_down() works on the rds_conn_path
that it is passed. Callers who are not t_m_capable may continue
calling rds_conn_connect_if_down, which will invoke
rds_conn_path_connect_if_down() with the default c_path[0].

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Make rds_send_pong() take a rds_conn_path argument
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:36 +0000 (09:44 -0700)]
RDS: Make rds_send_pong() take a rds_conn_path argument

This commit allows rds_send_pong() callers to send back
the rds pong message on some path other than c_path[0] by
passing in a struct rds_conn_path * argument.  It also
removes the last dependency on the #defines in rds_single.h
from send.c

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Extract rds_conn_path from i_conn_path in rds_send_drop_to() for MP-capable...
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:35 +0000 (09:44 -0700)]
RDS: Extract rds_conn_path from i_conn_path in rds_send_drop_to() for MP-capable transports

Explicitly set up rds_conn_path, either from i_conn_path (for
MP capable transpots) or as c_path[0], and use this in
rds_send_drop_to()

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Pass rds_conn_path to rds_send_xmit()
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:34 +0000 (09:44 -0700)]
RDS: Pass rds_conn_path to rds_send_xmit()

Pass a struct rds_conn_path to rds_send_xmit so that MP capable
transports can transmit packets on something other than c_path[0].
The eventual goal for MP capable transports is to hash the rds
socket to a path based on the bound local address/port, and use
this path as the argument to rds_send_xmit()

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Make rds_send_queue_rm() rds_conn_path aware
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:33 +0000 (09:44 -0700)]
RDS: Make rds_send_queue_rm() rds_conn_path aware

Pass the rds_conn_path to rds_send_queue_rm, and use it to initialize
the i_conn_path field in struct rds_incoming. This commit also makes
rds_send_queue_rm() MP capable, because it now takes locks
specific to the rds_conn_path passed in, instead of defaulting to
the c_path[0] based defines from rds_single_path.h

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Remove stale function rds_send_get_message()
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:32 +0000 (09:44 -0700)]
RDS: Remove stale function rds_send_get_message()

The only caller of rds_send_get_message() was
rds_iw_send_cq_comp_handler() which was removed as part of
commit dcdede0406d3 ("RDS: Drop stale iWARP RDMA transport"),
so remove rds_send_get_message() for the same reason.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Add rds_send_path_drop_acked()
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:31 +0000 (09:44 -0700)]
RDS: Add rds_send_path_drop_acked()

rds_send_path_drop_acked() is the path-specific version of
rds_send_drop_acked() to be invoked by MP capable callers.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Add rds_send_path_reset()
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:30 +0000 (09:44 -0700)]
RDS: Add rds_send_path_reset()

rds_send_path_reset() is the path specific version of rds_send_reset()
intended for MP capable callers.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: rds_inc_path_init() helper function for MP capable transports
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:29 +0000 (09:44 -0700)]
RDS: rds_inc_path_init() helper function for MP capable transports

t_mp_capable transports can use rds_inc_path_init to initialize
all fields in struct rds_incoming, including the i_conn_path.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: recv path gets the conn_path from rds_incoming for MP capable transports
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:28 +0000 (09:44 -0700)]
RDS: recv path gets the conn_path from rds_incoming for MP capable transports

Transports that are t_mp_capable should set the rds_conn_path
on which the datagram was recived in the ->i_conn_path field
of struct rds_incoming.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: add t_mp_capable bit to be set by MP capable transports
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:27 +0000 (09:44 -0700)]
RDS: add t_mp_capable bit to be set by MP capable transports

The t_mp_capable bit will be used in the core rds module
to support multipathing logic when the transport supports it.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: split out connection specific state from rds_connection to rds_conn_path
Sowmini Varadhan [Mon, 13 Jun 2016 16:44:26 +0000 (09:44 -0700)]
RDS: split out connection specific state from rds_connection to rds_conn_path

In preparation for multipath RDS, split the rds_connection
structure into a base structure, and a per-path struct rds_conn_path.
The base structure tracks information and locks common to all
paths. The workqs for send/recv/shutdown etc are tracked per
rds_conn_path. Thus the workq callbacks now work with rds_conn_path.

This commit allows for one rds_conn_path per rds_connection, and will
be extended into multiple conn_paths in  subsequent commits.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: return sizeof tcp_dctcp_info in dctcp_get_info()
Neal Cardwell [Mon, 13 Jun 2016 15:20:35 +0000 (11:20 -0400)]
tcp: return sizeof tcp_dctcp_info in dctcp_get_info()

Make sure that dctcp_get_info() returns only the size of the
info->dctcp struct that it zeroes out and fills in. Previously it had
been returning the size of the enclosing tcp_cc_info union,
sizeof(*info).  There is no problem yet, but that union that may one
day be larger than struct tcp_dctcp_info, in which case the
TCP_CC_INFO code might accidentally copy uninitialized bytes from the
stack.

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: fix error return code in sctp_init()
Wei Yongjun [Mon, 13 Jun 2016 15:08:26 +0000 (23:08 +0800)]
sctp: fix error return code in sctp_init()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'rxrpc-rewrite-20160613' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Wed, 15 Jun 2016 06:30:32 +0000 (23:30 -0700)]
Merge tag 'rxrpc-rewrite-20160613' of git://git./linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Rename rxrpc source files

Here's the next part of the AF_RXRPC rewrite.  In this set I rename some of
the files in the net/rxrpc/ directory and adjust the Makefile and
ar-internal.h to reflect the changes.

The aim is twofold:

 (1) Remove the "ar-" prefix on those files that have it as it's not really
     useful, especially now that I'm building rxkad in.

 (2) To aid splitting the local, peer, connection and call handling code
     into separate files for object and event handling in future patches by
     making it easier to come up with new filenames.

There are two commits:

 (1) The first commit does a bunch of renames of .c files and alters the
     Makefile.  ar-internal.h isn't renamed at this time to avoid having to
     change the contents of the files being renamed.

 (2) The second commit changes the section label comments in ar-internal.h
     to reflect the changed filenames and reorders the file so that the
     sections are back in filename order.

The patches can be found here also:

http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=rxrpc-rewrite

Tagged thusly:

git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
rxrpc-rewrite-20160613
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: update the dependency
Kejian Yan [Mon, 13 Jun 2016 08:56:20 +0000 (16:56 +0800)]
net: hns: update the dependency

After the patchset about adding support of ACPI (commit id is 6343488)
being applied, HNS does not depend on OF. It depends on OF or ACPI, so
the Kconfig file needs to be updated.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'r8152-phy-adjustments'
David S. Miller [Wed, 15 Jun 2016 05:38:02 +0000 (22:38 -0700)]
Merge branch 'r8152-phy-adjustments'

Hayes Wang says:

====================
r8152: code adjustment for PHY

These patches are for adjusting the code about PHY and setting speed.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agor8152: save the speed
hayeswang [Mon, 13 Jun 2016 09:49:38 +0000 (17:49 +0800)]
r8152: save the speed

The user may change the speed. Use it to replace the default one.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agor8152: move the setting for the default speed
hayeswang [Mon, 13 Jun 2016 09:49:37 +0000 (17:49 +0800)]
r8152: move the setting for the default speed

Move calling set_speed() from open() to rtl_hw_phy_work_func_t().
Then, we would set the default speed only for first initialization
or after resuming.

Besides, the set_speed() could handle the flag of PHY_RESET which
would be set in rtl_ops.hw_phy_cfg().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agor8152: move the settings of PHY to a work queue
hayeswang [Mon, 13 Jun 2016 09:49:36 +0000 (17:49 +0800)]
r8152: move the settings of PHY to a work queue

Move the settings of PHY to a work queue and schedule it after
rtl_ops.init().

There are some reasons for this. First, the settings are only
needed for the first time initialization or after the power
down occurs.

Second, the settings are independent with the others.

Last, the settings may take more time than the others. Leave
they in probe() or open() may delay the following flows.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/sched: flower: Return error when hw can't offload and skip_sw is set
Amir Vadai [Mon, 13 Jun 2016 09:06:39 +0000 (12:06 +0300)]
net/sched: flower: Return error when hw can't offload and skip_sw is set

When skip_sw is set and hardware fails to apply filter, return error to
user. This will make error propagation logic similar to the one
currently used in u32 classifier.
Also, changed code to use tc_skip_sw() utility function.

Signed-off-by: Amir Vadai <amirva@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'bnxt_en-updates'
David S. Miller [Tue, 14 Jun 2016 23:16:18 +0000 (19:16 -0400)]
Merge branch 'bnxt_en-updates'

Michael Chan says:

====================
bnxt_en: Updates for net-next.

-Add default VLAN support for VFs.
-Add NPAR (NIC partioning) support.
-Add support for new device 5731x and 5741x. GRO logic is different.
-Support new ETHTOOL_{G|S}LINKSETTINGS.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Support new ETHTOOL_{G|S}LINKSETTINGS API.
Michael Chan [Mon, 13 Jun 2016 06:25:38 +0000 (02:25 -0400)]
bnxt_en: Support new ETHTOOL_{G|S}LINKSETTINGS API.

To fully support 25G and 50G link settings.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Don't allow autoneg on cards that don't support it.
Michael Chan [Mon, 13 Jun 2016 06:25:37 +0000 (02:25 -0400)]
bnxt_en: Don't allow autoneg on cards that don't support it.

Some cards do not support autoneg.  The current code does not prevent the
user from enabling autoneg with ethtool on such cards, causing confusion.
Firmware provides the autoneg capability information and we just need to
store it in the support_auto_speeds field in bnxt_link_info struct.
The ethtool set_settings() call will check this field before proceeding
with autoneg.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Add BCM5731X and BCM5741X device IDs.
Michael Chan [Mon, 13 Jun 2016 06:25:36 +0000 (02:25 -0400)]
bnxt_en: Add BCM5731X and BCM5741X device IDs.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Add GRO logic for BCM5731X chips.
Michael Chan [Mon, 13 Jun 2016 06:25:35 +0000 (02:25 -0400)]
bnxt_en: Add GRO logic for BCM5731X chips.

Add bnxt_gro_func_5731x() to handle GRO packets for this chip.  The
completion structures used in the new chip have new data to help determine
the header offsets.  The offsets can be off by 4 if the packet is an
internal loopback packet (e.g. from one VF to another VF).  Some additional
logic is added to adjust the offsets if it is a loopback packet.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Refactor bnxt_gro_skb().
Michael Chan [Mon, 13 Jun 2016 06:25:34 +0000 (02:25 -0400)]
bnxt_en: Refactor bnxt_gro_skb().

Newer chips require different logic to handle GRO packets.  So refactor
the code so that we can call different functions depending on the chip.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Define the supported chip numbers.
Michael Chan [Mon, 13 Jun 2016 06:25:33 +0000 (02:25 -0400)]
bnxt_en: Define the supported chip numbers.

Define all the supported chip numbers and chip categories.  Store the
chip_num returned by firmware.  If the call to get the version and chip
number fails, we should abort.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Add PCI device ID for 57404 NPAR devices.
Michael Chan [Mon, 13 Jun 2016 06:25:32 +0000 (02:25 -0400)]
bnxt_en: Add PCI device ID for 57404 NPAR devices.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Enable NPAR (NIC Partitioning) Support.
Satish Baddipadige [Mon, 13 Jun 2016 06:25:31 +0000 (02:25 -0400)]
bnxt_en: Enable NPAR (NIC Partitioning) Support.

NPAR type is read from bnxt_hwrm_func_qcfg.  Do not allow changing link
parameters if in NPAR mode sinc ethe port is shared among multiple
partitions.  The link parameters are set up by firmware.

Signed-off-by: Satish Baddipadige <sbaddipa@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Handle VF_CFG_CHANGE event from firmware.
Michael Chan [Mon, 13 Jun 2016 06:25:30 +0000 (02:25 -0400)]
bnxt_en: Handle VF_CFG_CHANGE event from firmware.

When the VF driver gets this event, the VF configuration has changed (such
as default VLAN).  The VF driver will initiate a silent reset to pick up
the new configuration.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Add new function bnxt_reset().
Michael Chan [Mon, 13 Jun 2016 06:25:29 +0000 (02:25 -0400)]
bnxt_en: Add new function bnxt_reset().

When a default VLAN is added to the VF, the VF driver needs to reset to
pick up the default VLAN ID.  We can use the same tx timeout reset logic
to do that, without the debug output.  This new function, with the
silent parameter to suppress debug output will now serve both purposes.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnxt_en: Add function for VF driver to query default VLAN.
Michael Chan [Mon, 13 Jun 2016 06:25:28 +0000 (02:25 -0400)]
bnxt_en: Add function for VF driver to query default VLAN.

The PF can setup a default VLAN for a VF.  The default VLAN tag is
automatically inserted and stripped without the knowledge of the
stack running on the VF.  The VF driver needs to know that default
VLAN is enabled as VLAN acceleration on the RX side is no longer
supported.  Call netdev_update_features() to fix up the VLAN features
as necessary.  Also, VLAN strip mode must be enabled to strip out
the default VLAN tag.

Only allow VF default VLAN to be set if the firmware spec is >= 1.2.1.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: enic: move to new ethtool api {get|set}_link_ksettings
Philippe Reynes [Sun, 12 Jun 2016 21:30:54 +0000 (23:30 +0200)]
net: ethernet: enic: move to new ethtool api {get|set}_link_ksettings

The ethtool api {get|set}_settings is deprecated.
We move the enic driver to new api {get|set}_link_ksettings.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio_net: fix csum generation for virtio-net devices
Mike Rapoport [Tue, 14 Jun 2016 05:29:38 +0000 (08:29 +0300)]
virtio_net: fix csum generation for virtio-net devices

The commit e858fae2b0b8 ("virtio_net: use common code for virtio_net_hdr
and skb GSO conversion") replaced the tun code for header manipulation
with the generic helpers. While doing so, it implictly moved the
skb_partial_csum_set() invocation after eth_type_trans(), which
invalidate the current gso start/offset values.
Fix it by moving the helper invocation before the mac pulling.

Fixes: e858fae2b0b8 ("virtio_net: use common code for virtio_net_hdr and
skb GSO conversion")

Reported-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: Update the comments in ar-internal.h to reflect renames
David Howells [Mon, 13 Jun 2016 12:30:30 +0000 (13:30 +0100)]
rxrpc: Update the comments in ar-internal.h to reflect renames

Update the section comments in ar-internal.h that indicate the locations of
the referenced items to reflect the renames done to the .c files in
net/rxrpc/.

This also involves some rearrangement to reflect keep the sections in order
of filename.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: Rename files matching ar-*.c to git rid of the "ar-" prefix
David Howells [Mon, 13 Jun 2016 11:16:05 +0000 (12:16 +0100)]
rxrpc: Rename files matching ar-*.c to git rid of the "ar-" prefix

Rename files matching net/rxrpc/ar-*.c to get rid of the "ar-" prefix.
This will aid splitting those files by making easier to come up with new
names.

Note that the not all files are simply renamed from ar-X.c to X.c.  The
following exceptions are made:

 (*) ar-call.c -> call_object.c
     ar-ack.c -> call_event.c

     call_object.c is going to contain the core of the call object
     handling.  Call event handling is all going to be in call_event.c.

 (*) ar-accept.c -> call_accept.c

     Incoming call handling is going to be here.

 (*) ar-connection.c -> conn_object.c
     ar-connevent.c -> conn_event.c

     The former file is going to have the basic connection object handling,
     but there will likely be some differentiation between client
     connections and service connections in additional files later.  The
     latter file will have all the connection-level event handling.

 (*) ar-local.c -> local_object.c

     This will have the local endpoint object handling code.  The local
     endpoint event handling code will later be split out into
     local_event.c.

 (*) ar-peer.c -> peer_object.c

     This will have the peer endpoint object handling code.  Peer event
     handling code will be placed in peer_event.c (for the moment, there is
     none).

 (*) ar-error.c -> peer_event.c

     This will become the peer event handling code, though for the moment
     it's actually driven from the local endpoint's perspective.

Note that I haven't renamed ar-transport.c to transport_object.c as the
intention is to delete it when the rxrpc_transport struct is excised.

The only file that actually has its contents changed is net/rxrpc/Makefile.

net/rxrpc/ar-internal.h will need its section marker comments updating, but
I'll do that in a separate patch to make it easier for git to follow the
history across the rename.  I may also want to rename ar-internal.h at some
point - but that would mean updating all the #includes and I'd rather do
that in a separate step.

Signed-off-by: David Howells <dhowells@redhat.com.
8 years agosched: remove NET_XMIT_POLICED
Florian Westphal [Sat, 11 Jun 2016 10:46:04 +0000 (12:46 +0200)]
sched: remove NET_XMIT_POLICED

sch_atm returns this when TC_ACT_SHOT classification occurs.

But all other schedulers that use tc_classify
(htb, hfsc, drr, fq_codel ...) return NET_XMIT_SUCCESS | __BYPASS
in this case so just do that in atm.

BATMAN uses it as an intermediate return value to signal
forwarding vs. buffering, but it did not return POLICED to
callers outside of BATMAN.

Reviewed-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: fec: handle small PHY reset durations more precisely
Stefan Wahren [Wed, 8 Jun 2016 20:42:46 +0000 (20:42 +0000)]
net: fec: handle small PHY reset durations more precisely

Since msleep is based on jiffies the PHY reset could take longer
than expected. So use msleep for values greater than 20 msec otherwise
usleep_range.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv6: use TOS marks from sockets for routing decision
Hannes Frederic Sowa [Sat, 11 Jun 2016 18:08:19 +0000 (20:08 +0200)]
ipv6: use TOS marks from sockets for routing decision

In IPv6 the ToS values are part of the flowlabel in flowi6 and get
extracted during fib rule lookup, but we forgot to correctly initialize
the flowlabel before the routing lookup.

Reported-by: <liam.mcbirnie@boeing.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'remove-qdisc-throttle'
David S. Miller [Sat, 11 Jun 2016 06:58:29 +0000 (23:58 -0700)]
Merge branch 'remove-qdisc-throttle'

Eric Dumazet says:

====================
net_sched: remove qdisc_is_throttled()

HTB, CBQ and HFSC pay a very high cost updating the qdisc 'throttled'
status that nothing but CBQ seems to use.

CBQ usage is flaky anyway, since no qdisc ->enqueue() updates the
'throttled' qdisc status.

This looks like some 'optimization' that actually cost more than code
without the optimization, and might cause latency issues with CBQ.

In my tests, I could achieve a 8 % performance increase in TCP_RR
workload through HTB qdisc, in presence of throttled classes,
and 5 % without throttled classes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: remove generic throttled management
Eric Dumazet [Fri, 10 Jun 2016 23:41:39 +0000 (16:41 -0700)]
net_sched: remove generic throttled management

__QDISC_STATE_THROTTLED bit manipulation is rather expensive
for HTB and few others.

I already removed it for sch_fq in commit f2600cf02b5b
("net: sched: avoid costly atomic operation in fq_dequeue()")
and so far nobody complained.

When one ore more packets are stuck in one or more throttled
HTB class, a htb dequeue() performs two atomic operations
to clear/set __QDISC_STATE_THROTTLED bit, while root qdisc
lock is held.

Removing this pair of atomic operations bring me a 8 % performance
increase on 200 TCP_RR tests, in presence of throttled classes.

This patch has no side effect, since nothing actually uses
disc_is_throttled() anymore.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: netem: remove qdisc_is_throttled() use
Eric Dumazet [Fri, 10 Jun 2016 23:41:38 +0000 (16:41 -0700)]
net_sched: netem: remove qdisc_is_throttled() use

Looks like it is only there as some optimization attempt.

Since __QDISC_STATE_THROTTLED set/unset is way too expensive,
and netem is the last user, just remove this check.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: cbq: remove a flaky use of qdisc_is_throttled()
Eric Dumazet [Fri, 10 Jun 2016 23:41:37 +0000 (16:41 -0700)]
net_sched: cbq: remove a flaky use of qdisc_is_throttled()

So far no qdisc ever unset the throttled bit at enqueue() time,
so CBQ usage of qdisc_is_throttled() was flaky.

Since __QDISC_STATE_THROTTLED set/unset is way too expensive
considering that only CBQ was eventually caring for this status,
it would make sense to implement a Qdisc ops ->is_throttled()
if we find that this is needed.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: sch_plug: use a private throttled status
Eric Dumazet [Fri, 10 Jun 2016 23:41:36 +0000 (16:41 -0700)]
net_sched: sch_plug: use a private throttled status

We want to get rid of generic qdisc throttled management,
so this qdisc has to use a private flag.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mdio-iProc-SOC'
David S. Miller [Sat, 11 Jun 2016 06:24:55 +0000 (23:24 -0700)]
Merge branch 'mdio-iProc-SOC'

Pramod Kumar says:

====================
Add MDIO bus multiplexer support for iProc SoCs

Broadcom iProc based SoCs use a MDIO bus multiplexer where child buses
could be internal as well external to SoCs. These buses could supports
MDIO transaction compatible to C-22/C-45.

Broadcom MDIO bus multiplexer is an integrated multiplexer where child bus
selection and mdio transaction logic lies inside multiplexer itself.
To accommodate this multiplexer in existing mux framework below changes
were required-

1. Passed MDIO parent bus via mdio_mux_init to MDIO mux framework.

This patch set includes MDIO bus multiplexer driver along with above
framework change. It includes one external bus node having Ethernet PHY
attached and two internal bus node holding PCIe PHYs.

This patch series is based on v4.7-rc1 and is available from github-
repo: https://github.com/Broadcom/arm64-linux.git
branch:mdio-mux-v5

-Changes from v4:
- disabled PCIe PHYs from dtsi and enabled in dts file.

-Changes from v3:
- Unregister and free the parent MDIO bus.
- rebased on net-next/master branch.

Reason for resend:
-Rebased on v4.7-rc1

Changes from v2:
-Addressed Rob's comments in this patch regarding typo/grammers.
-Addressed David's comments regarding local variables order.
-Removed property "mdio-integrated-mux" and used mdiobus_register()
in place of of_mdiobus_regsiter().
-removed usage of IS_ERR_OR_NULL to IS_ERR in PCIe PHY driver.

Changes from v1:
- stop using "brcm,is_c45" from bus node as suggested by Andrew. MDIO
PHY driver will logically OR MII_ADDR_C45 into the address when issues
any C45 MDIO read/write transaction.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agophy: Add Northstar2 PCI Phy support
Pramod Kumar [Fri, 10 Jun 2016 05:33:51 +0000 (11:03 +0530)]
phy: Add Northstar2 PCI Phy support

Add PCI Phy support for Broadcom Northstar2 SoCs.  This driver uses the
interface from the iproc mdio mux driver to enable the devices
respective phys.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobinding: PHY: Binding doc for NS2 PCIe PHYs.
Pramod Kumar [Fri, 10 Jun 2016 05:33:50 +0000 (11:03 +0530)]
binding: PHY: Binding doc for NS2 PCIe PHYs.

Binding doc for NS2 PCIe PHYs.

Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Signed-off-by: Jon Mason <jonmason@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: mdio-mux: Add MDIO mux driver for iProc SoCs
Pramod Kumar [Fri, 10 Jun 2016 05:33:49 +0000 (11:03 +0530)]
net: mdio-mux: Add MDIO mux driver for iProc SoCs

iProc based SoCs supports the integrated mdio multiplexer which
has the bus selection as well as mdio transaction generation logic
inside.

This multiplexer has child buses for PCIe, SATA, USB and ETH. These
buses could be internal or external to SOC where PHYs are attached.
These buses could use C-45 or C-22 mdio transaction.

Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodt: mdio-mux: Add mdio multiplexer driver node
Pramod Kumar [Fri, 10 Jun 2016 05:33:48 +0000 (11:03 +0530)]
dt: mdio-mux: Add mdio multiplexer driver node

Add integrated MDIO multiplexer driver node which contains
two mux PCIe bus and one ethernet bus along with phys
lying on these bus.

Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobinding: mdio-mux: Add DT binding doc for Broadcom MDIO bus multiplexer
Pramod Kumar [Fri, 10 Jun 2016 05:33:47 +0000 (11:03 +0530)]
binding: mdio-mux: Add DT binding doc for Broadcom MDIO bus multiplexer

Add DT binding doc for Broadcom MDIO bus multiplexer driver.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobinding: Make "mdio-parent-bus" property from mandatory to optional
Pramod Kumar [Fri, 10 Jun 2016 05:33:46 +0000 (11:03 +0530)]
binding: Make "mdio-parent-bus" property from mandatory to optional

Change "mdio-parent-bus" from mandatory section to optional
as it won't be required by integrated MDIO multiplexer
which has bus selection and mdio transaction generation logic,
integrated inside.

Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomdio: mux: Enhanced MDIO mux framework for integrated multiplexers
Pramod Kumar [Fri, 10 Jun 2016 05:33:45 +0000 (11:03 +0530)]
mdio: mux: Enhanced MDIO mux framework for integrated multiplexers

An integrated multiplexer uses same address space for
"muxed bus selection" and "generation of mdio transaction"
hence its good to register parent bus from mux driver.

Hence added a mechanism where mux driver could register a
parent bus and pass it down to framework via mdio_mux_init api.

Signed-off-by: Pramod Kumar <pramod.kumar@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: sctp should change socket state when shutdown is received
Xin Long [Thu, 9 Jun 2016 14:48:18 +0000 (22:48 +0800)]
sctp: sctp should change socket state when shutdown is received

Now sctp doesn't change socket state upon shutdown reception. It changes
just the assoc state, even though it's a TCP-style socket.

For some cases, if we really need to check sk->sk_state, it's necessary to
fix this issue, at least when we use ss or netstat to dump, we can get a
more exact information.

As an improvement, we will change sk->sk_state when we change asoc->state
to SHUTDOWN_RECEIVED, and also do it in sctp_shutdown to keep consistent
with sctp_close.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo R. Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'mac80211-next-for-davem-2016-06-09' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Sat, 11 Jun 2016 06:13:32 +0000 (23:13 -0700)]
Merge tag 'mac80211-next-for-davem-2016-06-09' of git://git./linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
For the next cycle, we have the following:
 * the biggest change is MichaƂ's work on integrating FQ/codel
   with the mac80211 internal software queues
 * cfg80211 connect result gets clarified for the
   "no connection at all" case
 * advertisement of per-interface type capabilities, in case
   they differ (which makes a lot of sense for some capabilities)
 * most of the nl80211 & hwsim unprivileged namespace operation
   changes
 * human-readable VHT capabilities in debugfs
 * some other cleanups, like spelling
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'arm64-bpf'
David S. Miller [Sat, 11 Jun 2016 06:11:50 +0000 (23:11 -0700)]
Merge branch 'arm64-bpf'

Zi Shen Lim says:

====================
arm64 BPF JIT updates

Updates for arm64 eBPF JIT.
The main addition here is implementation of bpf_tail_call.

Changes since v2:
 - None. Resubmit per David Miller.

Changes since v1:
 - Added patch #1 to address build error due to missing header inclusion
   in linux/bpf.h. (Thanks to suggestion and ack by Daniel Borkmann)
   Ordered it ahead of bpf_tail_call patch #2 so build error is not
   triggered.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoarm64: bpf: optimize LD_ABS, LD_IND
Zi Shen Lim [Thu, 9 Jun 2016 04:18:50 +0000 (21:18 -0700)]
arm64: bpf: optimize LD_ABS, LD_IND

Remove superfluous stack frame, saving us 3 instructions for every
LD_ABS or LD_IND.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoarm64: bpf: optimize JMP_CALL
Zi Shen Lim [Thu, 9 Jun 2016 04:18:49 +0000 (21:18 -0700)]
arm64: bpf: optimize JMP_CALL

Remove superfluous stack frame, saving us 3 instructions for
every JMP_CALL.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoarm64: bpf: implement bpf_tail_call() helper
Zi Shen Lim [Thu, 9 Jun 2016 04:18:48 +0000 (21:18 -0700)]
arm64: bpf: implement bpf_tail_call() helper

Add support for JMP_CALL_X (tail call) introduced by commit 04fd61ab36ec
("bpf: allow bpf programs to tail-call other bpf programs").

bpf_tail_call() arguments:
  ctx   - context pointer passed to next program
  array - pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
  index - index inside array that selects specific program to run

In this implementation arm64 JIT jumps into callee program after prologue,
so callee program reuses the same stack. For tail_call_cnt, we use the
callee-saved R26 (which was already saved/restored but previously unused
by JIT).

With this patch a tail call generates the following code on arm64:

  if (index >= array->map.max_entries)
      goto out;

  34:   mov     x10, #0x10                      // #16
  38:   ldr     w10, [x1,x10]
  3c:   cmp     w2, w10
  40:   b.ge    0x0000000000000074

  if (tail_call_cnt > MAX_TAIL_CALL_CNT)
      goto out;
  tail_call_cnt++;

  44:   mov     x10, #0x20                      // #32
  48:   cmp     x26, x10
  4c:   b.gt    0x0000000000000074
  50:   add     x26, x26, #0x1

  prog = array->ptrs[index];
  if (prog == NULL)
      goto out;

  54:   mov     x10, #0x68                      // #104
  58:   ldr     x10, [x1,x10]
  5c:   ldr     x11, [x10,x2]
  60:   cbz     x11, 0x0000000000000074

  goto *(prog->bpf_func + prologue_size);

  64:   mov     x10, #0x20                      // #32
  68:   ldr     x10, [x11,x10]
  6c:   add     x10, x10, #0x20
  70:   br      x10
  74:

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobpf: fix missing header inclusion
Zi Shen Lim [Thu, 9 Jun 2016 04:18:47 +0000 (21:18 -0700)]
bpf: fix missing header inclusion

Commit 0fc174dea545 ("ebpf: make internal bpf API independent of
CONFIG_BPF_SYSCALL ifdefs") introduced usage of ERR_PTR() in
bpf_prog_get(), however did not include linux/err.h.

Without this patch, when compiling arm64 BPF without CONFIG_BPF_SYSCALL:
...
In file included from arch/arm64/net/bpf_jit_comp.c:21:0:
include/linux/bpf.h: In function 'bpf_prog_get':
include/linux/bpf.h:235:9: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration]
  return ERR_PTR(-EOPNOTSUPP);
         ^
include/linux/bpf.h:235:9: warning: return makes pointer from integer without a cast [-Wint-conversion]
In file included from include/linux/rwsem.h:17:0,
                 from include/linux/mm_types.h:10,
                 from include/linux/sched.h:27,
                 from arch/arm64/include/asm/compat.h:25,
                 from arch/arm64/include/asm/stat.h:23,
                 from include/linux/stat.h:5,
                 from include/linux/compat.h:12,
                 from include/linux/filter.h:10,
                 from arch/arm64/net/bpf_jit_comp.c:22:
include/linux/err.h: At top level:
include/linux/err.h:23:35: error: conflicting types for 'ERR_PTR'
 static inline void * __must_check ERR_PTR(long error)
                                   ^
In file included from arch/arm64/net/bpf_jit_comp.c:21:0:
include/linux/bpf.h:235:9: note: previous implicit declaration of 'ERR_PTR' was here
  return ERR_PTR(-EOPNOTSUPP);
         ^
...

Fixes: 0fc174dea545 ("ebpf: make internal bpf API independent of CONFIG_BPF_SYSCALL ifdefs")
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'tcp_nv'
David S. Miller [Sat, 11 Jun 2016 06:07:50 +0000 (23:07 -0700)]
Merge branch 'tcp_nv'

Lawrence Brakmo says:

====================
tcp: add NV congestion control

Removed most of the module parameters

Tested in a rack using between 1 and 380 active TCP-NV flows.

Consists of the following patches:
[PATCH net-next v2 1/2] tcp: add in_flight to tcp_skb_cb
[PATCH net-next v2 2/2] tcp: add NV congestion control
====================

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
8 years agotcp: add NV congestion control
Lawrence Brakmo [Thu, 9 Jun 2016 04:16:45 +0000 (21:16 -0700)]
tcp: add NV congestion control

TCP-NV (New Vegas) is a major update to TCP-Vegas.
An earlier version of NV was presented at 2010's LPC.
It is a delayed based congestion avoidance for the
data center. This version has been tested within a
10G rack where the HW RTTs are 20-50us and with
1 to 400 flows.

A description of TCP-NV, including implementation
details as well as experimental results, can be found at:
http://www.brakmo.org/networking/tcp-nv/TCPNV.html

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: add in_flight to tcp_skb_cb
Lawrence Brakmo [Thu, 9 Jun 2016 04:16:44 +0000 (21:16 -0700)]
tcp: add in_flight to tcp_skb_cb

Add in_flight (bytes in flight when packet was sent) field
to tx component of tcp_skb_cb and make it available to
congestion modules' pkts_acked() function through the
ack_sample function argument.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'virtio_net-GSO-helpers'
David S. Miller [Sat, 11 Jun 2016 06:03:56 +0000 (23:03 -0700)]
Merge branch 'virtio_net-GSO-helpers'

Mike Rapoport says:

====================
virtio_net: use common code for virtio_net_hdr and skb GSO conversion

This patches introduce virtio_net_hdr_{from,to}_skb functions for
conversion of GSO information between skb and virtio_net_hdr.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agopacket: use common code for virtio_net_hdr and skb GSO conversion
Mike Rapoport [Wed, 8 Jun 2016 13:09:22 +0000 (16:09 +0300)]
packet: use common code for virtio_net_hdr and skb GSO conversion

Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_from_skb

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio_net: use common code for virtio_net_hdr and skb GSO conversion
Mike Rapoport [Wed, 8 Jun 2016 13:09:21 +0000 (16:09 +0300)]
virtio_net: use common code for virtio_net_hdr and skb GSO conversion

Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_{from,to}_skb

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotuntap: use common code for virtio_net_hdr and skb GSO conversion
Mike Rapoport [Wed, 8 Jun 2016 13:09:20 +0000 (16:09 +0300)]
tuntap: use common code for virtio_net_hdr and skb GSO conversion

Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_{from,to}_skb

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomacvtap: use common code for virtio_net_hdr and skb GSO conversion
Mike Rapoport [Wed, 8 Jun 2016 13:09:19 +0000 (16:09 +0300)]
macvtap: use common code for virtio_net_hdr and skb GSO conversion

Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_{from,to}_skb

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio_net: introduce virtio_net_hdr_{from,to}_skb
Mike Rapoport [Wed, 8 Jun 2016 13:09:18 +0000 (16:09 +0300)]
virtio_net: introduce virtio_net_hdr_{from,to}_skb

The code for conversion between virtio_net_hdr and skb GSO info is
duplicated at several places. Let's put it to a common place to allow
reuse.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio_net: add _UAPI prefix to virtio_net header guards
Mike Rapoport [Wed, 8 Jun 2016 13:09:17 +0000 (16:09 +0300)]
virtio_net: add _UAPI prefix to virtio_net header guards

This gives better namespacing and prevents conflicts with no-uapi version
of virtio_net header that will be introduced in the following patch.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: IB: Remove deprecated create_workqueue
Bhaktipriya Shridhar [Tue, 7 Jun 2016 19:33:45 +0000 (01:03 +0530)]
RDS: IB: Remove deprecated create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

Since the driver is infiniband which can be used as block device and the
workqueue seems involved in regular operation of the device, so a
dedicated workqueue has been used  with WQ_MEM_RECLAIM set to guarantee
forward progress under memory pressure.
Since there are only a fixed number of work items, explicit concurrency
limit is unnecessary here.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoNET: PHY: adds driver for Intel XWAY PHY
Hauke Mehrtens [Sun, 5 Jun 2016 21:41:11 +0000 (23:41 +0200)]
NET: PHY: adds driver for Intel XWAY PHY

This adds support for the Intel (former Lantiq) XWAY 11G and 22E PHYs.
These PHYs are also named PEF 7061, PEF 7071, PEF 7072.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: Limit the listening backlog
David Howells [Fri, 10 Jun 2016 21:30:37 +0000 (22:30 +0100)]
rxrpc: Limit the listening backlog

Limit the socket incoming call backlog queue size so that a remote client
can't pump in sufficient new calls that the server runs out of memory.  Note
that this is partially theoretical at the moment since whilst the number of
calls is limited, the number of packets trying to set up new calls is not.
This will be addressed in a later patch.

If the caller of listen() specifies a backlog INT_MAX, then they get the
current maximum; anything else greater than max_backlog or anything
negative incurs EINVAL.

The limit on the maximum queue size can be set by:

echo N >/proc/sys/net/rxrpc/max_backlog

where 4<=N<=32.

Further, set the default backlog to 0, requiring listen() to be called
before we start actually queueing new calls.  Whilst this kind of is a
change in the UAPI, the caller can't actually *accept* new calls anyway
unless they've first called listen() to put the socket into the LISTENING
state - thus the aforementioned new calls would otherwise just sit there,
eating up kernel memory.  (Note that sockets that don't have a non-zero
service ID bound don't get incoming calls anyway.)

Given that the default backlog is now 0, make the AFS filesystem call
kernel_listen() to set the maximum backlog for itself.

Possible improvements include:

 (1) Trimming a too-large backlog to max_backlog when listen is called.

 (2) Trimming the backlog value whenever the value is used so that changes
     to max_backlog are applied to an open socket automatically.  Note that
     the AFS filesystem opens one socket and keeps it open for extended
     periods, so would miss out on changes to max_backlog.

 (3) Having a separate setting for the AFS filesystem.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: Trim line-terminal whitespace
David Howells [Fri, 10 Jun 2016 21:30:27 +0000 (22:30 +0100)]
rxrpc: Trim line-terminal whitespace

Trim line-terminal whitespace in net/rxrpc/

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet, cls: allow for deleting all filters for given parent
Daniel Borkmann [Fri, 10 Jun 2016 21:10:22 +0000 (23:10 +0200)]
net, cls: allow for deleting all filters for given parent

Add a possibility where the user can just specify the parent and
all filters under that parent are then being purged. Currently,
for example for scripting, one needs to specify pref/prio to have
a well-defined number for 'tc filter del' command for addressing
the previously created instance or additionally filter handle in
case of priorities being the same. Improve usage by allowing the
option for tc to specify the parent and removing the whole chain
for that given parent.

Example usage after patch, no tc changes required:

  # tc qdisc replace dev foo clsact
  # tc filter add dev foo egress bpf da obj ./bpf.o
  # tc filter add dev foo egress bpf da obj ./bpf.o
  # tc filter show dev foo egress
  filter protocol all pref 49151 bpf
  filter protocol all pref 49151 bpf handle 0x1 bpf.o:[classifier] direct-action
  filter protocol all pref 49152 bpf
  filter protocol all pref 49152 bpf handle 0x1 bpf.o:[classifier] direct-action
  # tc filter del dev foo egress
  # tc filter show dev foo egress
  #

Previously, RTM_DELTFILTER requests with invalid prio of 0 were
rejected, so only netlink requests with RTM_NEWTFILTER and NLM_F_CREATE
flag were allowed where the kernel would auto-generate a pref/prio.
We can piggyback on that and use prio of 0 as a wildcard for
requests of RTM_DELTFILTER.

For notifying tc netlink monitoring users (e.g. libnl uses this
for caching), there are two options, that is, sending individual
tfilter_notify() notifications for each tcf_proto, or sending a
single one indicating wildcard removal. I tried both and there
are pros and cons for each, eventually I decided for sending
individual tfilter_notify(), so that user space can support this
seamlessly and there won't be a mess of changing each and every
application to make sure expectations from the kernel won't break
when they don't understand single notification. Since linear chains
don't really scale, I expect only a handful of classifiers to be
attached at max for a given parent anyway.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'bpf-fixes'
David S. Miller [Sat, 11 Jun 2016 01:00:57 +0000 (18:00 -0700)]
Merge branch 'bpf-fixes'

Daniel Borkmann says:

====================
bpf: couple of fixes

These are two fixes for BPF, one to introduce xmit recursion limiter for
tc bpf programs and the other one to reject filters a bit earlier. For
more details please see individual patches. I have no strong opinion
to which tree they should go, they apply to both, but I think net-next
seems okay to me.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>