openwrt/staging/blogic.git
7 years agonet/tcp-fastopen: Add new API support
Wei Wang [Mon, 23 Jan 2017 18:59:22 +0000 (10:59 -0800)]
net/tcp-fastopen: Add new API support

This patch adds a new socket option, TCP_FASTOPEN_CONNECT, as an
alternative way to perform Fast Open on the active side (client). Prior
to this patch, a client needs to replace the connect() call with
sendto(MSG_FASTOPEN). This can be cumbersome for applications who want
to use Fast Open: these socket operations are often done in lower layer
libraries used by many other applications. Changing these libraries
and/or the socket call sequences are not trivial. A more convenient
approach is to perform Fast Open by simply enabling a socket option when
the socket is created w/o changing other socket calls sequence:
  s = socket()
    create a new socket
  setsockopt(s, IPPROTO_TCP, TCP_FASTOPEN_CONNECT …);
    newly introduced sockopt
    If set, new functionality described below will be used.
    Return ENOTSUPP if TFO is not supported or not enabled in the
    kernel.

  connect()
    With cookie present, return 0 immediately.
    With no cookie, initiate 3WHS with TFO cookie-request option and
    return -1 with errno = EINPROGRESS.

  write()/sendmsg()
    With cookie present, send out SYN with data and return the number of
    bytes buffered.
    With no cookie, and 3WHS not yet completed, return -1 with errno =
    EINPROGRESS.
    No MSG_FASTOPEN flag is needed.

  read()
    Return -1 with errno = EWOULDBLOCK/EAGAIN if connect() is called but
    write() is not called yet.
    Return -1 with errno = EWOULDBLOCK/EAGAIN if connection is
    established but no msg is received yet.
    Return number of bytes read if socket is established and there is
    msg received.

The new API simplifies life for applications that always perform a write()
immediately after a successful connect(). Such applications can now take
advantage of Fast Open by merely making one new setsockopt() call at the time
of creating the socket. Nothing else about the application's socket call
sequence needs to change.

Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Remove __sk_dst_reset() in tcp_v6_connect()
Wei Wang [Mon, 23 Jan 2017 18:59:21 +0000 (10:59 -0800)]
net: Remove __sk_dst_reset() in tcp_v6_connect()

Remove __sk_dst_reset() in the failure handling because __sk_dst_reset()
will eventually get called when sk is released. No need to handle it in
the protocol specific connect call.
This is also to make the code path consistent with ipv4.

Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/tcp-fastopen: refactor cookie check logic
Wei Wang [Mon, 23 Jan 2017 18:59:20 +0000 (10:59 -0800)]
net/tcp-fastopen: refactor cookie check logic

Refactor the cookie check logic in tcp_send_syn_data() into a function.
This function will be called else where in later changes.

Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agor8152: fix the wrong spelling
hayeswang [Wed, 25 Jan 2017 05:41:45 +0000 (13:41 +0800)]
r8152: fix the wrong spelling

Replace rumtime with runtime.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoDoc: DT: bindings: net: dsa: marvell.txt: Tabification
Andrew Lunn [Wed, 25 Jan 2017 01:44:48 +0000 (02:44 +0100)]
Doc: DT: bindings: net: dsa: marvell.txt: Tabification

Replace spaces with tabs. Fix indentation to be multiples of tabs, not
a mixture or tabs and spaces.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bpf-tracepoints'
David S. Miller [Wed, 25 Jan 2017 18:17:48 +0000 (13:17 -0500)]
Merge branch 'bpf-tracepoints'

Daniel Borkmann says:

====================
BPF tracepoints

This set adds tracepoints to BPF for better introspection and
debugging. The first two patches are prerequisite for the actual
third patch that adds the tracepoints. I think the first two are
small and straight forward enough that they could ideally go via
net-next, but I'm also open to other suggestions on how to route
them in case that's not applicable (it would reduce potential
merge conflicts on BPF side, though). For details, please see
individual patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: add initial bpf tracepoints
Daniel Borkmann [Wed, 25 Jan 2017 01:28:18 +0000 (02:28 +0100)]
bpf: add initial bpf tracepoints

This work adds a number of tracepoints to paths that are either
considered slow-path or exception-like states, where monitoring or
inspecting them would be desirable.

For bpf(2) syscall, tracepoints have been placed for main commands
when they succeed. In XDP case, tracepoint is for exceptions, that
is, f.e. on abnormal BPF program exit such as unknown or XDP_ABORTED
return code, or when error occurs during XDP_TX action and the packet
could not be forwarded.

Both have been split into separate event headers, and can be further
extended. Worst case, if they unexpectedly should get into our way in
future, they can also removed [1]. Of course, these tracepoints (like
any other) can be analyzed by eBPF itself, etc. Example output:

  # ./perf record -a -e bpf:* sleep 10
  # ./perf script
  sock_example  6197 [005]   283.980322:      bpf:bpf_map_create: map type=ARRAY ufd=4 key=4 val=8 max=256 flags=0
  sock_example  6197 [005]   283.980721:       bpf:bpf_prog_load: prog=a5ea8fa30ea6849c type=SOCKET_FILTER ufd=5
  sock_example  6197 [005]   283.988423:   bpf:bpf_prog_get_type: prog=a5ea8fa30ea6849c type=SOCKET_FILTER
  sock_example  6197 [005]   283.988443: bpf:bpf_map_lookup_elem: map type=ARRAY ufd=4 key=[06 00 00 00] val=[00 00 00 00 00 00 00 00]
  [...]
  sock_example  6197 [005]   288.990868: bpf:bpf_map_lookup_elem: map type=ARRAY ufd=4 key=[01 00 00 00] val=[14 00 00 00 00 00 00 00]
       swapper     0 [005]   289.338243:    bpf:bpf_prog_put_rcu: prog=a5ea8fa30ea6849c type=SOCKET_FILTER

  [1] https://lwn.net/Articles/705270/

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agolib, traceevent: add PRINT_HEX_STR variant
Daniel Borkmann [Wed, 25 Jan 2017 01:28:17 +0000 (02:28 +0100)]
lib, traceevent: add PRINT_HEX_STR variant

Add support for the __print_hex_str() macro that was added for
tracing, so that user space tools such as perf can understand
it as well.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotrace: add variant without spacing in trace_print_hex_seq
Daniel Borkmann [Wed, 25 Jan 2017 01:28:16 +0000 (02:28 +0100)]
trace: add variant without spacing in trace_print_hex_seq

For upcoming tracepoint support for BPF, we want to dump the program's
tag. Format should be similar to __print_hex(), but without spacing.
Add a __print_hex_str() variant for exactly that purpose that reuses
trace_print_hex_seq().

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: reduce skb overhead in selected places
Eric Dumazet [Tue, 24 Jan 2017 22:57:36 +0000 (14:57 -0800)]
tcp: reduce skb overhead in selected places

tcp_add_backlog() can use skb_condense() helper to get better
gains and less SKB_TRUESIZE() magic. This only happens when socket
backlog has to be used.

Some attacks involve specially crafted out of order tiny TCP packets,
clogging the ofo queue of (many) sockets.
Then later, expensive collapse happens, trying to copy all these skbs
into single ones.
This unfortunately does not work if each skb has no neighbor in TCP
sequence order.

By using skb_condense() if the skb could not be coalesced to a prior
one, we defeat these kind of threats, potentially saving 4K per skb
(or more, since this is one page fragment).

A typical NAPI driver allocates gro packets with GRO_MAX_HEAD bytes
in skb->head, meaning the copy done by skb_condense() is limited to
about 200 bytes.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'mlx5-updates-2017-01-24' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Wed, 25 Jan 2017 17:49:58 +0000 (12:49 -0500)]
Merge tag 'mlx5-updates-2017-01-24' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2017-24-01

The first seven patches from Or Gerlitz in this series further enhances
the mlx5 SRIOV switchdev mode to support offloading IPv6 tunnels using the
TC tunnel key set (encap) and unset (decap) actions.

Or Gerlitz says:
========================
As part of doing this change, few cleanups are done in the IPv4 code,
later we move to use the full tunnel key info provided to the driver as
the key for our internal hashing which is used to identify cases where
the same tunnel is used for encapsulating multiple flows. As done in the
IPv4 case, the control path for offloading IPv6 tunnels uses route/neigh
lookups and construction of the IPv6 tunnel headers on the encap path and
matching on the outer hears in the decap path.

The last patch of the series enlarges the HW FDB size for the switchdev mode,
so it has now room to contain offloaded flows as many as min(max number
of HW flow counters supported, max HW table size supported).
========================

Next to Or's series you can find several patches handling several topics.

From Mohamad, add support for SRIOV VF min rate guarantee by using the
TSAR BW share weights mechanism.

From Or, Two patches to enable Eth VFs to query their min-inline value for
user-space.
for that we move a mlx5 low level min inline helper function from mlx5
ethernet driver into the core driver and then use it in mlx5_ib to expose
the inline mode to rdma applications through libmlx5.

From Kamal Heib, Reduce memory consumption on kdump kernel.

From Shaker Daibes, code reuse in CQE compression control logic
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotipc: uninitialized return code in tipc_setsockopt()
Dan Carpenter [Tue, 24 Jan 2017 09:49:35 +0000 (12:49 +0300)]
tipc: uninitialized return code in tipc_setsockopt()

We shuffled some code around and added some new case statements here and
now "res" isn't initialized on all paths.

Fixes: 01fd12bb189a ("tipc: make replicast a user selectable option")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet sched actions: Add support for user cookies
Jamal Hadi Salim [Tue, 24 Jan 2017 12:02:41 +0000 (07:02 -0500)]
net sched actions: Add support for user cookies

Introduce optional 128-bit action cookie.
Like all other cookie schemes in the networking world (eg in protocols
like http or existing kernel fib protocol field, etc) the idea is to save
user state that when retrieved serves as a correlator. The kernel
_should not_ intepret it.  The user can store whatever they wish in the
128 bits.

Sample exercise(showing variable length use of cookie)

.. create an accept action with cookie a1b2c3d4
sudo $TC actions add action ok index 1 cookie a1b2c3d4

.. dump all gact actions..
sudo $TC -s actions ls action gact

    action order 0: gact action pass
     random type none pass val 0
     index 1 ref 1 bind 0 installed 5 sec used 5 sec
    Action statistics:
    Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
    backlog 0b 0p requeues 0
    cookie a1b2c3d4

.. bind the accept action to a filter..
sudo $TC filter add dev lo parent ffff: protocol ip prio 1 \
u32 match ip dst 127.0.0.1/32 flowid 1:1 action gact index 1

... send some traffic..
$ ping 127.0.0.1 -c 3
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.020 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.027 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.038 ms

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'netvsc-enhancements'
David S. Miller [Tue, 24 Jan 2017 21:29:02 +0000 (16:29 -0500)]
Merge branch 'netvsc-enhancements'

Stephen Hemminger says:

====================
netvsc driver enhancements for net-next

Lots of little things in here. Support for minor more ethtool control,
negotiation of offload parameters with host (based on FreeBSD) and
several cleanups.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: call netif_receive_skb
stephen hemminger [Tue, 24 Jan 2017 21:06:15 +0000 (13:06 -0800)]
netvsc: call netif_receive_skb

To improve performance, netvsc can call network stack directly and
avoid the local backlog queue. This is safe since incoming packets are
handled in softirq context already because the receive function
callback is called from a tasklet.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: simplify get next send section
stephen hemminger [Tue, 24 Jan 2017 21:06:14 +0000 (13:06 -0800)]
netvsc: simplify get next send section

Use kernel for_each_clear_bit macro to simplify finding next
available send section.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: report per-channel stats in ethtool statistics
Simon Xiao [Tue, 24 Jan 2017 21:06:13 +0000 (13:06 -0800)]
netvsc: report per-channel stats in ethtool statistics

Report packets and bytes transferred through a vmbus channel via ethtool.
This supersedes need for per-cpu statistics.

Example:
$ ethtool -S eth0
NIC statistics:
...
     tx_queue_0_packets: 3523179
     tx_queue_0_bytes: 505370920
     rx_queue_0_packets: 41430490
     rx_queue_0_bytes: 62714661254
     tx_queue_1_packets: 0
     tx_queue_1_bytes: 0
     rx_queue_1_packets: 0
     rx_queue_1_bytes: 0
...

Reviewed-by: Long Li <longli@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Simon Xiao <sixiao@microsoft.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: account for packets/bytes transmitted after completion
stephen hemminger [Tue, 24 Jan 2017 21:06:12 +0000 (13:06 -0800)]
netvsc: account for packets/bytes transmitted after completion

Most drivers do not increment transmit statistics until after the
transmit is completed. This will also be necessary for BQL support.

Slight additional complexity because the netvsc driver aggregates
multiple packets into one transmit.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: eliminate per-device outstanding send counter
stephen hemminger [Tue, 24 Jan 2017 21:06:11 +0000 (13:06 -0800)]
netvsc: eliminate per-device outstanding send counter

Since now keep track of per-queue outstanding sends, we can avoid
one atomic update by removing no longer needed per-device atomic.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: simplify rndis_filter_remove
stephen hemminger [Tue, 24 Jan 2017 21:06:10 +0000 (13:06 -0800)]
netvsc: simplify rndis_filter_remove

All caller's already have pointer to netvsc_device so pass it.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: don't pass void * to internal device_add
stephen hemminger [Tue, 24 Jan 2017 21:06:09 +0000 (13:06 -0800)]
netvsc: don't pass void * to internal device_add

All the caller's/callee's know that the format of the device_add
parameter is a netvsc_device_info struct.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: optimize receive path
stephen hemminger [Tue, 24 Jan 2017 21:06:08 +0000 (13:06 -0800)]
netvsc: optimize receive path

Do manual optimizations of receive path:
  - remove checks for impossible conditions (but keep checks
    for bad data from host)
  - pass argument down, rather than having callee recompute what
    is already known
  - remove indirection about receive buffer datalength
  - remove dependence on VLAN_TAG_PRESENCE
  - use _hot/_cold and likely/unlikely

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: group all per-channel state together
stephen hemminger [Tue, 24 Jan 2017 21:06:07 +0000 (13:06 -0800)]
netvsc: group all per-channel state together

Put all the per-channel state together in one data struct.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: remove unused variables
stephen hemminger [Tue, 24 Jan 2017 21:06:06 +0000 (13:06 -0800)]
netvsc: remove unused variables

Fixes set but never used warnings

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: enhance transmit select_queue
stephen hemminger [Tue, 24 Jan 2017 21:06:05 +0000 (13:06 -0800)]
netvsc: enhance transmit select_queue

The netvsc select queue function was missing many of the flow caching
features that exist in default tx queue selection. Add the same
logic to remember queue based on socket and implement two level
mapping (like RSS).

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: allow get/set of RSS indirection table
stephen hemminger [Tue, 24 Jan 2017 21:06:04 +0000 (13:06 -0800)]
netvsc: allow get/set of RSS indirection table

Allow setting receive indirection table. Also uses the system standard
for initialization.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: allow more flexible setting of number of channels
stephen hemminger [Tue, 24 Jan 2017 21:06:03 +0000 (13:06 -0800)]
netvsc: allow more flexible setting of number of channels

This allows for number of channels to be managed in a manner similar
to existing hardware drivers. It also removes the restriction of
maximum 8 channels and allows as many as the host will allow.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: add ethtool ops to get/set RSS key
stephen hemminger [Tue, 24 Jan 2017 21:06:02 +0000 (13:06 -0800)]
netvsc: add ethtool ops to get/set RSS key

For some cases it is useful to be able to change RSS key value.
For example, replacing RSS key with a symmetric hash.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: report rss field values
stephen hemminger [Tue, 24 Jan 2017 21:06:01 +0000 (13:06 -0800)]
netvsc: report rss field values

Report current components used in RSS hash.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: report number of rx queues in ethtool
stephen hemminger [Tue, 24 Jan 2017 21:06:00 +0000 (13:06 -0800)]
netvsc: report number of rx queues in ethtool

Report actual number of receive queues to ethtool.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: negotiate checksum and segmentation parameters
stephen hemminger [Tue, 24 Jan 2017 21:05:59 +0000 (13:05 -0800)]
netvsc: negotiate checksum and segmentation parameters

Redo how Hyper-V network driver negotiates offload features. Query the
host to determine offload settings, and use the result.

Also:
  * disable IPv4 header checksum offload (not used by Linux)
  * enable TSO only if host supports
  * enable UDP checksum offload if supported
  * don't advertise support for checksumming of non-IP protocols
  * adjust GSO maximum segment size
  * enable HIGHDMA

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: remove no longer needed receive staging buffers
stephen hemminger [Tue, 24 Jan 2017 21:05:58 +0000 (13:05 -0800)]
netvsc: remove no longer needed receive staging buffers

The ring buffer mapping now handles the wraparound case
inside get_next_pkt_raw. Therefore it is not necessary to have an
additional special receive staging buffer.

See commit 1562edaed8c164ca5199 ("Drivers: hv: ring_buffer: count on
wrap around mappings")

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mv88e6xxx-external-MDIO'
David S. Miller [Tue, 24 Jan 2017 20:33:52 +0000 (15:33 -0500)]
Merge branch 'mv88e6xxx-external-MDIO'

Andrew Lunn says:

====================
External MDIO support for mv88e6xxx

The mv88e6390 family of switches has two MDIO busses, one internal to
the switch and a second one for external usage. Older generations of switches
have a single MDIO bus, which is used both internally and externally.

Refactor the existing MDIO driver code to allow for multiple MDIO
busses, and implement the second MDIO bus on mv88e6390.

This is a rewrite of a patch previously submitted as part of "Batch
3". It has been broken up into 5 smaller patches. A compatible string
is now used in the device tree to indicate the external MDIO bus.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: mv88e6xxx: Implement the 6390 external MDIO bus
Andrew Lunn [Tue, 24 Jan 2017 13:53:51 +0000 (14:53 +0100)]
net: dsa: mv88e6xxx: Implement the 6390 external MDIO bus

With all the infrastructure in place, implement access to the external
MDIO bus on the 6390 family.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: mv88e6xxx: Support multiple MDIO busses
Andrew Lunn [Tue, 24 Jan 2017 13:53:50 +0000 (14:53 +0100)]
net: dsa: mv88e6xxx: Support multiple MDIO busses

The mv88e6390 has multiple MDIO busses. Generalize the parsing of the
device tree to support multiple mdio nodes. The external mdio bus has
a compatible strings to indicate it is external.

Keep a linked list of busses, placing the external mdio bus at the
tail of the list. When within the driver an mdio bus is needed,
e.g. for EEE or SERDES, use the head of the list which should be the
internal bus.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: mv88e6xxx: Add mdio private structure
Andrew Lunn [Tue, 24 Jan 2017 13:53:49 +0000 (14:53 +0100)]
net: dsa: mv88e6xxx: Add mdio private structure

Have the MDIO bus driver code allocate a private structure and make
the chip a member of it. This will allow us to add further members in
the future.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: mv88e6xxx: Pass mii_bus to all PHY operations
Andrew Lunn [Tue, 24 Jan 2017 13:53:48 +0000 (14:53 +0100)]
net: dsa: mv88e6xxx: Pass mii_bus to all PHY operations

In preparation for supporting multiple MDIO busses, pass the mii_bus
structure to all PHY operations. It will in future then be clear on
which MDIO bus the operation should be performed.

For reads/write from phylib, the mii_bus is readily available. However
some internal code also access the PHY, e.g. for EEE and SERDES. Make
this code use the one and only currently available MDIO bus.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: mv88e6xxx: Abstract mv88e6165 PHY operations
Andrew Lunn [Tue, 24 Jan 2017 13:53:47 +0000 (14:53 +0100)]
net: dsa: mv88e6xxx: Abstract mv88e6165 PHY operations

The mv88e6165 family has the internal PHYs mapped directly onto the
SMI register space as the switch. So the registers can be read
directly. Put a wrapper around this, in preparation for changing the
signature in order to support the external MDIO bus of the 6390.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sctp: fix array overrun read on sctp_timer_tbl
Colin Ian King [Tue, 24 Jan 2017 09:25:54 +0000 (09:25 +0000)]
net: sctp: fix array overrun read on sctp_timer_tbl

Table sctp_timer_tbl is missing a TIMEOUT_RECONF string so
add this in. Also compare timeout with the size of the array
sctp_timer_tbl rather than SCTP_EVENT_TIMEOUT_MAX.  Also add
a build time check that SCTP_EVENT_TIMEOUT_MAX is correct
so we don't ever get this kind of mismatch between the table
and SCTP_EVENT_TIMEOUT_MAX in the future.

Kudos to Marcelo Ricardo Leitner for spotting the missing string
and suggesting the build time sanity check.

Fixes CoverityScan CID#1397639 ("Out-of-bounds read")

Fixes: 7b9438de0cd4 ("sctp: add stream reconf timer")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'aquantia'
David S. Miller [Tue, 24 Jan 2017 20:03:42 +0000 (15:03 -0500)]
Merge branch 'aquantia'

David VomLehn says:

====================
net: ethernet: aquantia: Add AQtion 2.5/5 GB NIC driver

This series introduces the AQtion NIC driver for the aQuantia
AQC107/AQC108 network devices.

v1: Initial version
v2: o Make necessary drivers/net/ethernet changes to integrate software
    o Drop intermediate atlantic directory
    o Remove Makefile things only appropriate to out of tree module
      building
v3: o Move changes to drivers/net/ethernet/{Kconfig,Makefile} to the last
      patch to ensure clean bisection.
    o Removed inline attribute aq_hw_write_req() as it was defined in
      only one .c file.
    o #included pci.h in aq_common.h to get struct pci definition.
    o Modified code to unlock based execution flow rather than using a
      flag.
    o Made a number of functions that were only used in a single file
      static.
    o Cleaned up error and return code handling in various places.
    o Remove AQ_CFG_IP_ALIGN definition.
    o Other minor code clean up.
v4: o Using do_div for 64 bit division.
    o Modified NIC statistics code.
    o Using build_skb instead netdev_alloc_skb for single fragment packets.
    o Removed extra aq_nic.o from Makefile
v5: o Removed extra newline at the end of the files.
v6: o Removed unnecessary cast from void*.
    o Reworked strings array for ethtool statistics.
    o Added stringset == ETH_SS_STATS checking.
    o AQ_OBJ_HEADER replaced to aq_obj_header_s struct.
    o AQ_OBJ_SET/TST/CLR macroses replaced to inline functions.
    o Driver sources placed in to atlantic directory.
    o Fixed compilation warnings (Make W=1)
    o Added firmware version checking.
    o Code cleaning.
v7  o Removed unnecessary cast from memory allocation function (aq_ring.c).
v8  o Switched to using kcalloc instead kzalloc.
    o Now provide bus_info for ethtool
    o Used div() to avoid __bad_udelay build error.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Integrate AQtion 2.5/5 GB NIC driver
David VomLehn [Tue, 24 Jan 2017 06:09:20 +0000 (22:09 -0800)]
net: ethernet: aquantia: Integrate AQtion 2.5/5 GB NIC driver

Modify the drivers/net/ethernet/{Makefile,Kconfig} file to make them a
part of the network drivers build.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Receive side scaling
David VomLehn [Tue, 24 Jan 2017 06:09:19 +0000 (22:09 -0800)]
net: ethernet: aquantia: Receive side scaling

Add definitions that support receive side scaling.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Ethtool support
David VomLehn [Tue, 24 Jan 2017 06:09:18 +0000 (22:09 -0800)]
net: ethernet: aquantia: Ethtool support

Add the driver interfaces required for support by the ethtool utility.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Hardware interface and utility functions
David VomLehn [Tue, 24 Jan 2017 06:09:17 +0000 (22:09 -0800)]
net: ethernet: aquantia: Hardware interface and utility functions

Add functions to interface with the hardware and some utility functions.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Atlantic hardware abstraction layer
David VomLehn [Tue, 24 Jan 2017 06:09:16 +0000 (22:09 -0800)]
net: ethernet: aquantia: Atlantic hardware abstraction layer

Add common functions for Atlantic hardware abstraction layer.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: PCI operations
David VomLehn [Tue, 24 Jan 2017 06:09:15 +0000 (22:09 -0800)]
net: ethernet: aquantia: PCI operations

Add functions that handle the PCI bus interface.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Vector operations
David VomLehn [Tue, 24 Jan 2017 06:09:14 +0000 (22:09 -0800)]
net: ethernet: aquantia: Vector operations

Add functions to manululate the vector of receive and transmit rings.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel.Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Atlantic A0 and B0 specific functions.
David VomLehn [Tue, 24 Jan 2017 06:09:13 +0000 (22:09 -0800)]
net: ethernet: aquantia: Atlantic A0 and B0 specific functions.

Add Atlantic A0 and B0 specific functions.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Support for NIC-specific code
David VomLehn [Tue, 24 Jan 2017 06:09:12 +0000 (22:09 -0800)]
net: ethernet: aquantia: Support for NIC-specific code

Add support for code specific to the Atlantic NIC.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Low-level hardware interfaces
David VomLehn [Tue, 24 Jan 2017 06:09:11 +0000 (22:09 -0800)]
net: ethernet: aquantia: Low-level hardware interfaces

Add definitions of functions that interface directly with the hardware.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel.Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Add ring support code
David VomLehn [Tue, 24 Jan 2017 06:09:10 +0000 (22:09 -0800)]
net: ethernet: aquantia: Add ring support code

Add code to support the transmit and receive ring buffers.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Common functions and definitions
David VomLehn [Tue, 24 Jan 2017 06:09:09 +0000 (22:09 -0800)]
net: ethernet: aquantia: Common functions and definitions

Add files containing the functions and definitions used in common in
different functional areas.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ethernet: aquantia: Make and configuration files.
David VomLehn [Tue, 24 Jan 2017 06:09:08 +0000 (22:09 -0800)]
net: ethernet: aquantia: Make and configuration files.

Patches to create the make and configuration files.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: Drop WARN() in tag_brcm.c
Florian Fainelli [Tue, 24 Jan 2017 03:19:07 +0000 (19:19 -0800)]
net: dsa: Drop WARN() in tag_brcm.c

We may be able to see invalid Broadcom tags when the hardware and drivers are
misconfigured, or just while exercising the error path. Instead of flooding
the console with messages, flat out drop the packet.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ks8851: Drop eeprom_size structure member
Stephen Boyd [Tue, 24 Jan 2017 01:49:20 +0000 (17:49 -0800)]
net: ks8851: Drop eeprom_size structure member

After commit 51b7b1c34e19 (KSZ8851-SNL: Add ethtool support for
EEPROM via eeprom_93cx6, 2011-11-21) this structure member is
unused. Delete it.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bpf-misc'
David S. Miller [Tue, 24 Jan 2017 19:46:07 +0000 (14:46 -0500)]
Merge branch 'bpf-misc'

Daniel Borkmann says:

====================
Misc BPF improvements

This series adds various misc improvements to BPF, f.e. allowing
skb_load_bytes() helper to be used with filter/reuseport programs
to facilitate programming, test cases for program tag, etc. For
details, please see individual patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: enable verifier to better track const alu ops
Daniel Borkmann [Tue, 24 Jan 2017 00:06:30 +0000 (01:06 +0100)]
bpf: enable verifier to better track const alu ops

William reported couple of issues in relation to direct packet
access. Typical scheme is to check for data + [off] <= data_end,
where [off] can be either immediate or coming from a tracked
register that contains an immediate, depending on the branch, we
can then access the data. However, in case of calculating [off]
for either the mentioned test itself or for access after the test
in a more "complex" way, then the verifier will stop tracking the
CONST_IMM marked register and will mark it as UNKNOWN_VALUE one.

Adding that UNKNOWN_VALUE typed register to a pkt() marked
register, the verifier then bails out in check_packet_ptr_add()
as it finds the registers imm value below 48. In the first below
example, that is due to evaluate_reg_imm_alu() not handling right
shifts and thus marking the register as UNKNOWN_VALUE via helper
__mark_reg_unknown_value() that resets imm to 0.

In the second case the same happens at the time when r4 is set
to r4 &= r5, where it transitions to UNKNOWN_VALUE from
evaluate_reg_imm_alu(). Later on r4 we shift right by 3 inside
evaluate_reg_alu(), where the register's imm turns into 3. That
is, for registers with type UNKNOWN_VALUE, imm of 0 means that
we don't know what value the register has, and for imm > 0 it
means that the value has [imm] upper zero bits. F.e. when shifting
an UNKNOWN_VALUE register by 3 to the right, no matter what value
it had, we know that the 3 upper most bits must be zero now.
This is to make sure that ALU operations with unknown registers
don't overflow. Meaning, once we know that we have more than 48
upper zero bits, or, in other words cannot go beyond 0xffff offset
with ALU ops, such an addition will track the target register
as a new pkt() register with a new id, but 0 offset and 0 range,
so for that a new data/data_end test will be required. Is the source
register a CONST_IMM one that is to be added to the pkt() register,
or the source instruction is an add instruction with immediate
value, then it will get added if it stays within max 0xffff bounds.
>From there, pkt() type, can be accessed should reg->off + imm be
within the access range of pkt().

  [...]
  from 28 to 30: R0=imm1,min_value=1,max_value=1
    R1=pkt(id=0,off=0,r=22) R2=pkt_end
    R3=imm144,min_value=144,max_value=144
    R4=imm0,min_value=0,max_value=0
    R5=inv48,min_value=2054,max_value=2054 R10=fp
  30: (bf) r5 = r3
  31: (07) r5 += 23
  32: (77) r5 >>= 3
  33: (bf) r6 = r1
  34: (0f) r6 += r5
  cannot add integer value with 0 upper zero bits to ptr_to_packet

  [...]
  from 52 to 80: R0=imm1,min_value=1,max_value=1
    R1=pkt(id=0,off=0,r=34) R2=pkt_end R3=inv
    R4=imm272 R5=inv56,min_value=17,max_value=17
    R6=pkt(id=0,off=26,r=34) R10=fp
  80: (07) r4 += 71
  81: (18) r5 = 0xfffffff8
  83: (5f) r4 &= r5
  84: (77) r4 >>= 3
  85: (0f) r1 += r4
  cannot add integer value with 3 upper zero bits to ptr_to_packet

Thus to get above use-cases working, evaluate_reg_imm_alu() has
been extended for further ALU ops. This is fine, because we only
operate strictly within realm of CONST_IMM types, so here we don't
care about overflows as they will happen in the simulated but also
real execution and interaction with pkt() in check_packet_ptr_add()
will check actual imm value once added to pkt(), but it's irrelevant
before.

With regards to 06c1c049721a ("bpf: allow helpers access to variable
memory") that works on UNKNOWN_VALUE registers, the verifier becomes
now a bit smarter as it can better resolve ALU ops, so we need to
adapt two test cases there, as min/max bound tracking only becomes
necessary when registers were spilled to stack. So while mask was
set before to track upper bound for UNKNOWN_VALUE case, it's now
resolved directly as CONST_IMM, and such contructs are only necessary
when f.e. registers are spilled.

For commit 6b17387307ba ("bpf: recognize 64bit immediate loads as
consts") that initially enabled dw load tracking only for nfp jit/
analyzer, I did couple of tests on large, complex programs and we
don't increase complexity badly (my tests were in ~3% range on avg).
I've added a couple of tests similar to affected code above, and
it works fine with verifier now.

Reported-by: William Tu <u9012063@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Gianluca Borello <g.borello@gmail.com>
Cc: William Tu <u9012063@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: add prog tag test case to bpf selftests
Daniel Borkmann [Tue, 24 Jan 2017 00:06:29 +0000 (01:06 +0100)]
bpf: add prog tag test case to bpf selftests

Add the test case used to compare the results from fdinfo with
af_alg's output on the tag. Tests are from min to max sized
programs, with and without maps included.

  # ./test_tag
  test_tag: OK (40945 tests)

Tested on x86_64 and s390x.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: allow option for setting bpf_l4_csum_replace from scratch
Daniel Borkmann [Tue, 24 Jan 2017 00:06:28 +0000 (01:06 +0100)]
bpf: allow option for setting bpf_l4_csum_replace from scratch

When programs need to calculate the csum from scratch for small UDP
packets and use bpf_l4_csum_replace() to feed the result from helpers
like bpf_csum_diff(), then we need a flag besides BPF_F_MARK_MANGLED_0
that would ignore the case of current csum being 0, and which would
still allow for the helper to set the csum and transform when needed
to CSUM_MANGLED_0.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: enable load bytes helper for filter/reuseport progs
Daniel Borkmann [Tue, 24 Jan 2017 00:06:27 +0000 (01:06 +0100)]
bpf: enable load bytes helper for filter/reuseport progs

BPF_PROG_TYPE_SOCKET_FILTER are used in various facilities such as
for SO_REUSEPORT and packet fanout demuxing, packet filtering, kcm,
etc, and yet the only facility they can use is BPF_LD with {BPF_ABS,
BPF_IND} for single byte/half/word access.

Direct packet access is only restricted to tc programs right now,
but we can still facilitate usage by allowing skb_load_bytes() helper
added back then in 05c74e5e53f6 ("bpf: add bpf_skb_load_bytes helper")
that calls skb_header_pointer() similarly to bpf_load_pointer(), but
for stack buffers with larger access size.

Name the previous sk_filter_func_proto() as bpf_base_func_proto()
since this is used everywhere else as well, similarly for the ctx
converter, that is, bpf_convert_ctx_access().

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: simplify __is_valid_access test on cb
Daniel Borkmann [Tue, 24 Jan 2017 00:06:26 +0000 (01:06 +0100)]
bpf: simplify __is_valid_access test on cb

The __is_valid_access() test for cb[] from 62c7989b24db ("bpf: allow
b/h/w/dw access for bpf's cb in ctx") was done unnecessarily complex,
we can just simplify it the same way as recent fix from 2d071c643f1c
("bpf, trace: make ctx access checks more robust") did. Overflow can
never happen as size is 1/2/4/8 depending on access.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/mlx5e: CQE compression control code reuse
Shaker Daibes [Sat, 10 Dec 2016 16:45:55 +0000 (18:45 +0200)]
net/mlx5e: CQE compression control code reuse

This patch is intended for code reuse of mlx5e_modify_rx_cqe_compression
function.

Signed-off-by: Shaker Daibes <shakerd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Reduce memory consumption on kdump kernel
Kamal Heib [Tue, 22 Nov 2016 09:03:32 +0000 (11:03 +0200)]
net/mlx5e: Reduce memory consumption on kdump kernel

Reduce memory consumption on kdump kernel by decreasing the number of
channels to 1 and the size of RQs and SQs to the minimal values.

Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agoIB/mlx5: Enable Eth VFs to query their min-inline value for user-space
Or Gerlitz [Wed, 30 Nov 2016 18:33:33 +0000 (20:33 +0200)]
IB/mlx5: Enable Eth VFs to query their min-inline value for user-space

For some mlx5 HW models (CX4, CX4Lx), the VF driver needs to put part
of the packet headers on the TX descriptor so the e-switch can do proper
matching and steering. This is called "min-inline", it's advertized to
the VF by the FW and also enforced on them by the HW, such that if they
don't obey, their packets are dropped.

SRIOV VF libmlx5 instances should take into account the min-inline
value of their vports. For that end, we provide this value through
the vendor response part of init_ucontext command.

The min inline value is reported in a way which will let newer libmlx5
instances realize that they are running over an older kernel and act
accordingly (e.g apply some educated guess).

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Push min-inline mode resolution helper into the core
Or Gerlitz [Wed, 30 Nov 2016 18:23:51 +0000 (20:23 +0200)]
net/mlx5: Push min-inline mode resolution helper into the core

So we can use that from the IB driver too in downstream patches.

This patch doesn't change any functionality.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Add support for setting VF min rate
Mohamad Haj Yahia [Thu, 15 Dec 2016 12:02:53 +0000 (14:02 +0200)]
net/mlx5: Add support for setting VF min rate

Add support for SRIOV VF min rate guarantee by using the TSAR BW share
weights mechanism.

The TSAR BW share vport attribute represents the weight of that vport
among the other vports weights which means that the actual vport BW
percentage is the same vport weight percentage among the total vports
weights sum.

Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: E-Switch, Enlarge the FDB size for the switchdev mode
Or Gerlitz [Tue, 20 Dec 2016 10:38:05 +0000 (12:38 +0200)]
net/mlx5: E-Switch, Enlarge the FDB size for the switchdev mode

The E-Switch FDB size was hard coded to 8k. Change it to be

  min(max eswitch table size, max flow counters * num flow groups)

where the max values are read from the firmware and the number of
flow groups is hard-coded as before this change.

We don't know upfront the division of flows to group. This setup allows
each group to be of size up to the where we want to support (we mandate
pairing of flows with counters for offloading). Thus, we don't expect
multiple occurences for a group which in turn adds steering hops.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Tested-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Support SRIOV TC encapsulation offloads for IPv6 tunnels
Or Gerlitz [Sun, 11 Dec 2016 19:28:28 +0000 (21:28 +0200)]
net/mlx5e: Support SRIOV TC encapsulation offloads for IPv6 tunnels

Add the missing parts for offloading IPv6 tunnels. This includes
route and neigh lookups and construnction of the IPv6 tunnel headers.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Maximize ip tunnel key usage on the TC offloading path
Or Gerlitz [Tue, 3 Jan 2017 17:03:00 +0000 (19:03 +0200)]
net/mlx5e: Maximize ip tunnel key usage on the TC offloading path

Use more fields out of the tunnel key (e.g the tunnel source IP address)
provided by upper layers for the route lookup done on the encap offload path.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Use the full tunnel key info for encapsulation offload house-keeping
Or Gerlitz [Thu, 5 Jan 2017 14:43:29 +0000 (16:43 +0200)]
net/mlx5e: Use the full tunnel key info for encapsulation offload house-keeping

Currently we use subset of the input tunnel key fields (id, ip daddr,
dst port) which are provided by upper layers to indentify flows that should
go through the same encapsulation and maintain the HW encapsulation table.

This is redundant and can get us wrong.

Instead, keep a copy of the ip tunnel info provided by the user
through TC and have the tunnel key part as the key to our internal hash.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: TC ipv4 tunnel encap offload cosmetic changes
Or Gerlitz [Wed, 21 Dec 2016 15:31:18 +0000 (17:31 +0200)]
net/mlx5e: TC ipv4 tunnel encap offload cosmetic changes

Move around some settings of variables as pre-step to make things
more robust and clear for the ipv6 case in down-stream patch.
This patch doesn't change any functionality.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Add TC offloads matching on IPv6 encapsulation headers
Or Gerlitz [Sun, 11 Dec 2016 10:20:53 +0000 (12:20 +0200)]
net/mlx5e: Add TC offloads matching on IPv6 encapsulation headers

Enhance the parsing of offloaded TC rules to set HW matching on outer
IPv6 encapsulation headers. This effectively adds support for TC tunnel
key release action (decapsulation) of SRIOV offloads over IPv6 tunnels.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Use exact encap header size for the FW input buffer
Or Gerlitz [Sun, 11 Dec 2016 10:15:08 +0000 (12:15 +0200)]
net/mlx5: Use exact encap header size for the FW input buffer

The current code is allocating the max encap size supported by
the firmware and not the size requested by the caller, fix that.

Also, spare a warning when the size of the encapsulation headers
is bigger from what is supported by the firmware.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agophy: marvell: remove conflicting initializer
Arnd Bergmann [Mon, 23 Jan 2017 12:18:41 +0000 (13:18 +0100)]
phy: marvell: remove conflicting initializer

One line was apparently pasted incorrectly during a new feature patch:

drivers/net/phy/marvell.c:2090:15: error: initialized field overwritten [-Werror=override-init]
   .features = PHY_GBIT_FEATURES,

I'm removing the extraneous line here to avoid the W=1 warning and restore
the previous flags value, and I'm slightly reordering the lines for consistency
to make it less likely to happen again in the future. The ordering in the
array is still not the same as in the structure definition, instead I picked
the order that is most common in this file and that seems to make more sense
here.

Fixes: 0b04680fdae4 ("phy: marvell: Add support for temperature sensor")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dummy: Introduce dummy virtual functions
Phil Sutter [Mon, 23 Jan 2017 11:17:33 +0000 (12:17 +0100)]
net: dummy: Introduce dummy virtual functions

The idea for this was born when testing VF support in iproute2 which was
impeded by hardware requirements. In fact, not every VF-capable hardware
driver implements all netdev ops, so testing the interface is still hard
to do even with a well-sorted hardware shelf.

To overcome this and allow for testing the user-kernel interface, this
patch allows to turn dummy into a PF with a configurable amount of VFs.

Since my patch series 'bus-agnostic-num-vf' has been accepted,
implementing the required interfaces is pretty straightforward: Iff
'num_vfs' module parameter was given a value >0, a dummy bus type is
being registered which implements the 'num_vf()' callback. Additionally,
a dummy parent device common to all dummy devices is registered which
sits on the above dummy bus.

Joint work with Sabrina Dubroca.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: broadcom: bnx2x: use new api ethtool_{get|set}_link_ksettings
Philippe Reynes [Sat, 21 Jan 2017 13:43:16 +0000 (14:43 +0100)]
net: broadcom: bnx2x: use new api ethtool_{get|set}_link_ksettings

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

As I don't have the hardware, I'd be very pleased if
someone may test this patch.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Acked-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'packet-sampling-offload'
David S. Miller [Tue, 24 Jan 2017 18:44:29 +0000 (13:44 -0500)]
Merge branch 'packet-sampling-offload'

Jiri Pirko says:

====================
Add support for offloading packet-sampling

Yotam says:

The first patch introduces the psample module, a netlink channel dedicated
to packet sampling implemented using generic netlink. This module provides
a generic way for kernel modules to sample packets, while not being tied
to any specific subsystem like NFLOG.

The second patch adds the sample tc action, which uses psample to randomly
sample packets that match a classifier. The user can configure the psample
group number, the sampling rate and the packet's truncation (to save
kernel-user traffic).

The last two patches add the support for offloading the matchall-sample
tc command in the mlxsw driver, for ingress qdiscs.

An example for psample usage can be found in the libpsample project at:
https://github.com/Mellanox/libpsample

v1->v2:
- Reword first patch's commit message
- Fix typo in comment in second patch
- Change order of tc_sample uapi enum to match convention
- Rename act_sample action callback tcf_sample -> tcf_sample_act
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: Add packet sample offloading support
Yotam Gigi [Mon, 23 Jan 2017 10:07:11 +0000 (11:07 +0100)]
mlxsw: spectrum: Add packet sample offloading support

Using the MPSC register, add the functions that configure port-based
packet sampling in hardware and the necessary datatypes in the
mlxsw_sp_port struct. In addition, add the necessary trap for sampled
packets and integrate with matchall offloading to allow offloading of the
sample tc action.

The current offload support is for the tc command:

tc filter add dev <DEV> parent ffff: \
  matchall skip_sw \
  action sample rate <RATE> group <GROUP> [trunc <SIZE>]

Where only ingress qdiscs are supported, and only a combination of
matchall classifier and sample action will lead to activating hardware
packet sampling.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: reg: add the Monitoring Packet Sampling Configuration Register
Yotam Gigi [Mon, 23 Jan 2017 10:07:10 +0000 (11:07 +0100)]
mlxsw: reg: add the Monitoring Packet Sampling Configuration Register

The MPSC register allows to configure ingress packet sampling on specific
port of the mlxsw device. The sampled packets are then trapped via
PKT_SAMPLE trap.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/sched: Introduce sample tc action
Yotam Gigi [Mon, 23 Jan 2017 10:07:09 +0000 (11:07 +0100)]
net/sched: Introduce sample tc action

This action allows the user to sample traffic matched by tc classifier.
The sampling consists of choosing packets randomly and sampling them using
the psample module. The user can configure the psample group number, the
sampling rate and the packet's truncation (to save kernel-user traffic).

Example:
To sample ingress traffic from interface eth1, one may use the commands:

tc qdisc add dev eth1 handle ffff: ingress

tc filter add dev eth1 parent ffff: \
   matchall action sample rate 12 group 4

Where the first command adds an ingress qdisc and the second starts
sampling randomly with an average of one sampled packet per 12 packets on
dev eth1 to psample group 4.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Introduce psample, a new genetlink channel for packet sampling
Yotam Gigi [Mon, 23 Jan 2017 10:07:08 +0000 (11:07 +0100)]
net: Introduce psample, a new genetlink channel for packet sampling

Add a general way for kernel modules to sample packets, without being tied
to any specific subsystem. This netlink channel can be used by tc,
iptables, etc. and allow to standardize packet sampling in the kernel.

For every sampled packet, the psample module adds the following metadata
fields:

PSAMPLE_ATTR_IIFINDEX - the packets input ifindex, if applicable

PSAMPLE_ATTR_OIFINDEX - the packet output ifindex, if applicable

PSAMPLE_ATTR_ORIGSIZE - the packet's original size, in case it has been
   truncated during sampling

PSAMPLE_ATTR_SAMPLE_GROUP - the packet's sample group, which is set by the
   user who initiated the sampling. This field allows the user to
   differentiate between several samplers working simultaneously and
   filter packets relevant to him

PSAMPLE_ATTR_GROUP_SEQ - sequence counter of last sent packet. The
   sequence is kept for each group

PSAMPLE_ATTR_SAMPLE_RATE - the sampling rate used for sampling the packets

PSAMPLE_ATTR_DATA - the actual packet bits

The sampled packets are sent to the PSAMPLE_NL_MCGRP_SAMPLE multicast
group. In addition, add the GET_GROUPS netlink command which allows the
user to see the current sample groups, their refcount and sequence number.
This command currently supports only netlink dump mode.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mdio_module_driver-misc'
David S. Miller [Tue, 24 Jan 2017 18:37:51 +0000 (13:37 -0500)]
Merge branch 'mdio_module_driver-misc'

Florian Fainelli says:

====================
net: couple mdio_module_driver changes

Small patch series fixing a comment for mdio_module_driver and
finally utilizing it in b53_mdio.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: b53: Utilize mdio_module_driver
Florian Fainelli [Mon, 23 Jan 2017 05:17:33 +0000 (21:17 -0800)]
net: dsa: b53: Utilize mdio_module_driver

Eliminate a bit of boilerplate code.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: phy: Fix typo for MDIO module boilerplate comment
Florian Fainelli [Mon, 23 Jan 2017 05:17:32 +0000 (21:17 -0800)]
net: phy: Fix typo for MDIO module boilerplate comment

The module boilerplate macro is named mdio_module_driver and not
module_mdio_driver, fix that.

Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'stmmac-dwmac-meson8b-configurable-RGMII-TX-delay'
David S. Miller [Tue, 24 Jan 2017 18:35:41 +0000 (13:35 -0500)]
Merge branch 'stmmac-dwmac-meson8b-configurable-RGMII-TX-delay'

Martin Blumenstingl says:

====================
stmmac: dwmac-meson8b: configurable RGMII TX delay

Currently the dwmac-meson8b stmmac glue driver uses a hardcoded 1/4
cycle (= 2ns) TX clock delay. This seems to work fine for many boards
(for example Odroid-C2 or Amlogic's reference boards) but there are
some others where TX traffic is simply broken.
There are probably multiple reasons why it's working on some boards
while it's broken on others:
- some of Amlogic's reference boards are using a Micrel PHY
- hardware circuit design
- maybe more...

iperf3 results on my Mecool BB2 board (Meson GXM, RTL8211F PHY) with
TX clock delay disabled on the MAC (as it's enabled in the PHY driver).
TX throughput was virtually zero before:
$ iperf3 -c 192.168.1.100 -R
Connecting to host 192.168.1.100, port 5201
Reverse mode, remote host 192.168.1.100 is sending
[  4] local 192.168.1.206 port 52828 connected to 192.168.1.100 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   108 MBytes   901 Mbits/sec
[  4]   1.00-2.00   sec  94.2 MBytes   791 Mbits/sec
[  4]   2.00-3.00   sec  96.5 MBytes   810 Mbits/sec
[  4]   3.00-4.00   sec  96.2 MBytes   808 Mbits/sec
[  4]   4.00-5.00   sec  96.6 MBytes   810 Mbits/sec
[  4]   5.00-6.00   sec  96.5 MBytes   810 Mbits/sec
[  4]   6.00-7.00   sec  96.6 MBytes   810 Mbits/sec
[  4]   7.00-8.00   sec  96.5 MBytes   809 Mbits/sec
[  4]   8.00-9.00   sec   105 MBytes   884 Mbits/sec
[  4]   9.00-10.00  sec   111 MBytes   934 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  1000 MBytes   839 Mbits/sec    0             sender
[  4]   0.00-10.00  sec   998 MBytes   837 Mbits/sec                  receiver

iperf Done.
$ iperf3 -c 192.168.1.100
Connecting to host 192.168.1.100, port 5201
[  4] local 192.168.1.206 port 52832 connected to 192.168.1.100 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.01   sec  99.5 MBytes   829 Mbits/sec  117    139 KBytes
[  4]   1.01-2.00   sec   105 MBytes   884 Mbits/sec  129   70.7 KBytes
[  4]   2.00-3.01   sec   107 MBytes   889 Mbits/sec  106    187 KBytes
[  4]   3.01-4.01   sec   105 MBytes   878 Mbits/sec   92    143 KBytes
[  4]   4.01-5.00   sec   105 MBytes   882 Mbits/sec  140    129 KBytes
[  4]   5.00-6.01   sec   106 MBytes   883 Mbits/sec  115    195 KBytes
[  4]   6.01-7.00   sec   102 MBytes   863 Mbits/sec  133   70.7 KBytes
[  4]   7.00-8.01   sec   106 MBytes   884 Mbits/sec  143   97.6 KBytes
[  4]   8.01-9.01   sec   104 MBytes   875 Mbits/sec  124    107 KBytes
[  4]   9.01-10.01  sec   105 MBytes   876 Mbits/sec   90    139 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.01  sec  1.02 GBytes   874 Mbits/sec  1189             sender
[  4]   0.00-10.01  sec  1.02 GBytes   873 Mbits/sec                  receiver

iperf Done.

I get similar TX throughput on my Meson GXBB "MXQ Pro+" board when I
disable the PHY's TX-delay and configure a 4ms TX-delay on the MAC.
So changes to at least the RTL8211F PHY driver are needed to get it
working properly in all situations.

Changes since v4:
- add a fallback of 2ns (the value which was previously hardcoded) for
  the TX delay so we are backwards-compatible with older .dts'
- update the documentation with the new fallback value and add a small
  note that the "amlogic,tx-delay" property is ignored when the phy-mode
  is "rmii".

Changes since v3:
- rebased to apply against current net-next branch (fixes a conflict
  with d2ed0a7755fe14c7 "net: ethernet: stmmac: fix of-node and
  fixed-link-phydev leaks")

Changes since v2:
- moved all .dts patches (3-7) to a separate series
- removed the default 2ns TX delay when phy-mode RGMII is specified
- (rebased against current net-next)

Changes since v1:
- renamed the devicetree property "amlogic,tx-delay" to
  "amlogic,tx-delay-ns", which makes the .dts easier to read as we can
  simply specify human-readable values instead of having "preprocessor
  defines and calculation in human brain". Thanks to Andrew Lunn for
  the suggestion!
- improved documentation to indicate when the MAC TX-delay should be
  configured and how to use the PHY's TX-delay
- changed the default TX-delay in the dwmac-meson8b driver from 2ns
  to 0ms when any of the rgmii-*id modes are used (the 2ns default
  value still applies for phy-mode "rgmii")
- added patches to properly reset the PHY on Meson GXBB devices and to
  use a similar configuration than the one we use on Meson GXL devices
  (by passing a phy-handle to stmmac and defining the PHY in the mdio0
  bus - patch 3-6)
- add the "amlogic,tx-delay-ns" property to all boards which are using
  the RGMII PHY (patch 7)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: stmmac: dwmac-meson8b: make the RGMII TX delay configurable
Martin Blumenstingl [Sun, 22 Jan 2017 22:02:46 +0000 (23:02 +0100)]
net: stmmac: dwmac-meson8b: make the RGMII TX delay configurable

Prior to this patch we were using a hardcoded RGMII TX clock delay of
2ns (= 1/4 cycle of the 125MHz RGMII TX clock). This value works for
many boards, but unfortunately not for all (due to the way the actual
circuit is designed, sometimes because the TX delay is enabled in the
PHY, etc.). Making the TX delay on the MAC side configurable allows us
to support all possible hardware combinations.

This allows fixing a compatibility issue on some boards, where the
RTL8211F PHY is configured to generate the TX delay. We can now turn
off the TX delay in the MAC, because otherwise we would be applying the
delay twice (which results in non-working TX traffic).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dt-bindings: add RGMII TX delay configuration to meson8b-dwmac
Martin Blumenstingl [Sun, 22 Jan 2017 22:02:45 +0000 (23:02 +0100)]
net: dt-bindings: add RGMII TX delay configuration to meson8b-dwmac

This allows configuring the RGMII TX clock delay. The RGMII clock is
generated by underlying hardware of the the Meson 8b / GXBB DWMAC glue.
The configuration depends on the actual hardware (no delay may be
needed due to the design of the actual circuit, the PHY might add this
delay, etc.).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: Fix inverted test for multiple CPU interface
Andrew Lunn [Sun, 22 Jan 2017 21:16:45 +0000 (22:16 +0100)]
net: dsa: Fix inverted test for multiple CPU interface

Remove the wrong !, otherwise we get false positives about having
multiple CPU interfaces.

Fixes: b22de490869d ("net: dsa: store CPU switch structure in the tree")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobridge: multicast to unicast
Felix Fietkau [Sat, 21 Jan 2017 20:01:32 +0000 (21:01 +0100)]
bridge: multicast to unicast

Implements an optional, per bridge port flag and feature to deliver
multicast packets to any host on the according port via unicast
individually. This is done by copying the packet per host and
changing the multicast destination MAC to a unicast one accordingly.

multicast-to-unicast works on top of the multicast snooping feature of
the bridge. Which means unicast copies are only delivered to hosts which
are interested in it and signalized this via IGMP/MLD reports
previously.

This feature is intended for interface types which have a more reliable
and/or efficient way to deliver unicast packets than broadcast ones
(e.g. wifi).

However, it should only be enabled on interfaces where no IGMPv2/MLDv1
report suppression takes place. This feature is disabled by default.

The initial patch and idea is from Felix Fietkau.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
[linus.luessing@c0d3.blue: various bug + style fixes, commit message]
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoIntroduce a sysctl that modifies the value of PROT_SOCK.
Krister Johansen [Sat, 21 Jan 2017 01:49:11 +0000 (17:49 -0800)]
Introduce a sysctl that modifies the value of PROT_SOCK.

Add net.ipv4.ip_unprivileged_port_start, which is a per namespace sysctl
that denotes the first unprivileged inet port in the namespace.  To
disable all privileged ports set this to zero.  It also checks for
overlap with the local port range.  The privileged and local range may
not overlap.

The use case for this change is to allow containerized processes to bind
to priviliged ports, but prevent them from ever being allowed to modify
their container's network configuration.  The latter is accomplished by
ensuring that the network namespace is not a child of the user
namespace.  This modification was needed to allow the container manager
to disable a namespace's priviliged port restrictions without exposing
control of the network namespace to processes in the user namespace.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, lpm: fix kfree of im_node in trie_update_elem
Daniel Borkmann [Tue, 24 Jan 2017 00:26:46 +0000 (01:26 +0100)]
bpf, lpm: fix kfree of im_node in trie_update_elem

We need to initialize im_node to NULL, otherwise in case of error path
it gets passed to kfree() as uninitialized pointer.

Fixes: b95a5c4db09b ("bpf: add a longest prefix match trie map implementation")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bpf-lpm'
David S. Miller [Mon, 23 Jan 2017 21:10:38 +0000 (16:10 -0500)]
Merge branch 'bpf-lpm'

Daniel Mack says:

====================
bpf: add longest prefix match map

This patch set adds a longest prefix match algorithm that can be used
to match IP addresses to a stored set of ranges. It is exposed as a
bpf map type.

Internally, data is stored in an unbalanced tree of nodes that has a
maximum height of n, where n is the prefixlen the trie was created
with.

Note that this has nothing to do with fib or fib6 and is in no way meant
to replace or share code with it. It's rather a much simpler
implementation that is specifically written with bpf maps in mind.

Patch 1/2 adds the implementation, 2/2 an extensive test suite and 3/3
has benchmarking code for the new trie type.

Feedback is much appreciated.

Changelog:

v3 -> v4:
* David added a 3rd patch that augments map_perf_test for
  LPM trie benchmarks
* Limit allocation of maps of this new type to CAP_SYS_ADMIN
  for now, as requested by Alexei
* Add a stub .map_delete_elem so the core does not stumble
  over a NULL pointer when the syscall is invoked
* Tests for non-power-of-2 prefix lengths were added
* More comment style fixes

v2 -> v3:
* Store both the key match data and the caller provided
  value in the same byte array attached to a node. This
  avoids double allocations
* Bring back node->flags to distinguish between 'real'
  and intermediate nodes
* Fix comment style and some typos

v1 -> v2:
* Turn spin lock into raw spinlock
* Lock with irqsave options during trie_update_elem()
* Return -ENOMEM properly from trie_alloc()
* Force attr->flags == BPF_F_NO_PREALLOC during creation
* Set trie->map.pages after creation to account for map memory
* Allow arbitrary value sizes
* Removed node->flags and denode intermediate nodes through
  node->value == NULL instead

rfc -> v1:
* Add __rcu pointer annotations to make sparse happy
* Fold _lpm_trie_find_target_node() into its only caller
* Fix some minor documentation issues
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosamples/bpf: add lpm-trie benchmark
David Herrmann [Sat, 21 Jan 2017 16:26:13 +0000 (17:26 +0100)]
samples/bpf: add lpm-trie benchmark

Extend the map_perf_test_{user,kern}.c infrastructure to stress test
lpm-trie lookups. We hook into the kprobe on sys_gettid() and measure
the latency depending on trie size and lookup count.

On my Intel Haswell i7-6400U, a single gettid() syscall with an empty
bpf program takes roughly 6.5us on my system. Lookups in empty tries
take ~1.8us on first try, ~0.9us on retries. Lookups in tries with 8192
entries take ~7.1us (on the first _and_ any subsequent try).

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Daniel Mack <daniel@zonque.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: Add tests for the lpm trie map
David Herrmann [Sat, 21 Jan 2017 16:26:12 +0000 (17:26 +0100)]
bpf: Add tests for the lpm trie map

The first part of this program runs randomized tests against the
lpm-bpf-map. It implements a "Trivial Longest Prefix Match" (tlpm)
based on simple, linear, single linked lists. The implementation
should be pretty straightforward.

Based on tlpm, this inserts randomized data into bpf-lpm-maps and
verifies the trie-based bpf-map implementation behaves the same way
as tlpm.

The second part uses 'real world' IPv4 and IPv6 addresses and tests
the trie with those.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Mack <daniel@zonque.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: add a longest prefix match trie map implementation
Daniel Mack [Sat, 21 Jan 2017 16:26:11 +0000 (17:26 +0100)]
bpf: add a longest prefix match trie map implementation

This trie implements a longest prefix match algorithm that can be used
to match IP addresses to a stored set of ranges.

Internally, data is stored in an unbalanced trie of nodes that has a
maximum height of n, where n is the prefixlen the trie was created
with.

Tries may be created with prefix lengths that are multiples of 8, in
the range from 8 to 2048. The key used for lookup and update operations
is a struct bpf_lpm_trie_key, and the value is a uint64_t.

The code carries more information about the internal implementation.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: xilinx: constify net_device_ops structure
Bhumika Goyal [Sat, 21 Jan 2017 06:58:58 +0000 (12:28 +0530)]
net: xilinx: constify net_device_ops structure

Declare net_device_ops structure as const as it is only stored in
the netdev_ops field of a net_device structure. This field is of type
const, so net_device_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct net_device_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct net_device ndev;
@@
ndev.netdev_ops=&i@p

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct net_device_ops i;

File size before:
   text    data     bss     dec     hex filename
   6201     744       0    6945    1b21 ethernet/xilinx/xilinx_emaclite.o

File size after:
   text    data     bss     dec     hex filename
   6745     192       0    6937    1b19 ethernet/xilinx/xilinx_emaclite.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: moxa: constify net_device_ops structures
Bhumika Goyal [Sat, 21 Jan 2017 06:57:26 +0000 (12:27 +0530)]
net: moxa: constify net_device_ops structures

Declare net_device_ops structure as const as it is only stored in
the netdev_ops field of a net_device structure. This field is of type
const, so net_device_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct net_device_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct net_device ndev;
@@
ndev.netdev_ops=&i@p

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct net_device_ops i;

File size before:
   text    data     bss     dec     hex filename
   4821     744       0    5565    15bd ethernet/moxa/moxart_ether.o

File size after:
   text    data     bss     dec     hex filename
   5373     192       0    5565    15bd ethernet/moxa/moxart_ether.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: qcom/emac: claim the irq only when the device is opened
Timur Tabi [Fri, 20 Jan 2017 23:21:04 +0000 (17:21 -0600)]
net: qcom/emac: claim the irq only when the device is opened

During reset, functions emac_mac_down() and emac_mac_up() are called,
so we don't want to free and claim the IRQ unnecessarily.  Move those
operations to open/close.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: qcom/emac: rename emac_phy to emac_sgmii and move it
Timur Tabi [Fri, 20 Jan 2017 23:21:03 +0000 (17:21 -0600)]
net: qcom/emac: rename emac_phy to emac_sgmii and move it

The EMAC has an internal PHY that is often called the "SGMII".  This
SGMII is also connected to an external PHY, which is managed by phylib.
These dual PHYs often cause confusion.  In this case, the data structure
for managing the SGMII was mis-named and located in the wrong header file.

Structure emac_phy is renamed to emac_sgmii to clearly indicate it applies
to the internal PHY only.  It also also moved from emac_phy.h (which
supports the external PHY) to emac_sgmii.h (where it belongs).

To keep the changes minimal, only the structure name is changed, not
the names of any variables of that type.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobnx2x: avoid two atomic ops per page on x86
Eric Dumazet [Fri, 20 Jan 2017 16:25:34 +0000 (08:25 -0800)]
bnx2x: avoid two atomic ops per page on x86

Commit 4cace675d687 ("bnx2x: Alloc 4k fragment for each rx ring buffer
element") added extra put_page() and get_page() calls on arches where
PAGE_SIZE=4K like x86

Reorder things to avoid this overhead.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com>
Cc: Yuval Mintz <Yuval.Mintz@cavium.com>
Cc: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>