Gustavo A. R. Silva [Sun, 13 Aug 2017 01:38:55 +0000 (20:38 -0500)]
liquidio: fix duplicated code for different branches
Refactor code in order to avoid identical code for different branches.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rick Farrington [Sat, 12 Aug 2017 01:43:14 +0000 (18:43 -0700)]
liquidio: update debug console logging mechanism
- remove logging dependency upon global func octeon_console_debug_enabled()
- abstract debug console logging using console structure (via function ptr)
to allow for more flexible logging
Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arvind Yadav [Sun, 13 Aug 2017 11:13:18 +0000 (16:43 +0530)]
net: ti: cpsw:: constify platform_device_id
platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arvind Yadav [Sun, 13 Aug 2017 11:12:42 +0000 (16:42 +0530)]
net: sh_eth: constify platform_device_id
platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arvind Yadav [Sun, 13 Aug 2017 11:12:08 +0000 (16:42 +0530)]
net: dpaa_eth: constify platform_device_id
platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arvind Yadav [Sun, 13 Aug 2017 11:11:45 +0000 (16:41 +0530)]
can: constify platform_device_id
platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Sat, 12 Aug 2017 21:52:31 +0000 (22:52 +0100)]
tap: make struct tap_fops static
The structure tap_fops is local to the source and does not need to
be in global scope, so make it static.
Cleans up sparse warning:
symbol 'tap_fops' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Sat, 12 Aug 2017 21:45:53 +0000 (22:45 +0100)]
virtio-net: make array guest_offloads static
The array guest_offloads is local to the source and does not need to
be in global scope, so make it static. Also tweak formatting.
Cleans up sparse warnings:
symbol 'guest_offloads' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sergei Shtylyov [Sat, 12 Aug 2017 21:03:06 +0000 (00:03 +0300)]
of_mdio: merge branch tails in of_phy_register_fixed_link()
Looks like gcc isn't always able to figure out that 3 *if* branches in
of_phy_register_fixed_link() calling fixed_phy_register() at their ends
are similar enough and thus can be merged. The "manual" merge saves 40
bytes of the object code (AArch64 gcc 4.8.5), and still saves 12 bytes
even if gcc was able to merge the branch tails (ARM gcc 4.8.5)...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 14 Aug 2017 03:05:13 +0000 (20:05 -0700)]
Merge branch 'vrf-Support-for-local-traffic-with-sockets-bound-to-enslaved-devices'
David Ahern says:
====================
net: vrf: Support for local traffic with sockets bound to enslaved devices
This set gets local traffic working for sockets bound to enslaved
devices. The local rtable and rt6_info added in June 2016 to get
local traffic in VRFs working is no longer needed and actually
keeps local traffic for sockets bound to an enslaved device from
working. Patch 1 removes them.
Patch 2 adds a fix up for IPv4 IP_PKTINFO to return rt_iif for
packets sent over the VRF device. This is similar to the handling
of loopback.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Sat, 12 Aug 2017 00:11:15 +0000 (17:11 -0700)]
net: ipv4: add check for l3slave for index returned in IP_PKTINFO
Similar to the loopback device, for packets sent through a VRF device
the index returned in ipi_ifindex needs to be the saved index in
rt_iif.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Sat, 12 Aug 2017 00:11:14 +0000 (17:11 -0700)]
net: vrf: Drop local rtable and rt6_info
The VRF cached rtable and rt6_info for local traffic are no longer
needed and actually prevent local traffic through enslaved devices.
Remove them.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Sat, 12 Aug 2017 00:02:02 +0000 (17:02 -0700)]
net: ipv4: remove unnecessary check on orig_oif
rt_iif is going to be set to either 0 or orig_oif. If orig_oif
is 0 it amounts to the same end result so remove the check.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Girish Moodalbail [Fri, 11 Aug 2017 22:20:59 +0000 (15:20 -0700)]
vxlan: change vxlan_[config_]validate() to use netlink_ext_ack for error reporting
The kernel log is not where users expect error messages for netlink
requests; as we have extended acks now, we can replace pr_debug() with
NL_SET_ERR_MSG_ATTR().
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 14 Aug 2017 02:56:07 +0000 (19:56 -0700)]
Merge branch 'tap-XDP-support'
Jason Wang says:
====================
XDP support for tap
This series tries to implement XDP support for tap. Two path were
implemented:
- fast path: small & non-gso packet, For performance reason we do it
at page level and use build_skb() to create skb if necessary.
- slow path: big or gso packet, we don't want to lose the capability
compared to generic XDP, so we export some generic xdp helpers and
do it after skb was created.
xdp1 shows about 41% improvement, xdp_redirect shows about 60%
improvement.
Changes from V1:
- fix the race between xdp set and free
- don't hold extra refcount
- add XDP_REDIRECT support
Please review.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 11 Aug 2017 11:41:18 +0000 (19:41 +0800)]
tap: XDP support
This patch tries to implement XDP for tun. The implementation was
split into two parts:
- fast path: small and no gso packet. We try to do XDP at page level
before build_skb(). For XDP_TX, since creating/destroying queues
were completely under control of userspace, it was implemented
through generic XDP helper after skb has been built. This could be
optimized in the future.
- slow path: big or gso packet. We try to do it after skb was created
through generic XDP helpers.
Test were done through pktgen with small packets.
xdp1 test shows ~41.1% improvement:
Before: ~1.7Mpps
After: ~2.3Mpps
xdp_redirect to ixgbe shows ~60% improvement:
Before: ~0.8Mpps
After: ~1.38Mpps
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 11 Aug 2017 11:41:17 +0000 (19:41 +0800)]
net: export some generic xdp helpers
This patch tries to export some generic xdp helpers to drivers. This
can let driver to do XDP for a specific skb. This is useful for the
case when the packet is hard to be processed at page level directly
(e.g jumbo/GSO frame).
With this patch, there's no need for driver to forbid the XDP set when
configuration is not suitable. Instead, it can defer the XDP for
packets that is hard to be processed directly after skb is created.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 11 Aug 2017 11:41:16 +0000 (19:41 +0800)]
tap: use build_skb() for small packet
We use tun_alloc_skb() which calls sock_alloc_send_pskb() to allocate
skb in the past. This socket based method is not suitable for high
speed userspace like virtualization which usually:
- ignore sk_sndbuf (INT_MAX) and expect to receive the packet as fast as
possible
- don't want to be block at sendmsg()
To eliminate the above overheads, this patch tries to use build_skb()
for small packet. We will do this only when the following conditions
are all met:
- TAP instead of TUN
- sk_sndbuf is INT_MAX
- caller don't want to be blocked
- zerocopy is not used
- packet size is smaller enough to use build_skb()
Pktgen from guest to host shows ~11% improvement for rx pps of tap:
Before: ~1.70Mpps
After : ~1.88Mpps
What's more important, this makes it possible to implement XDP for tap
before creating skbs.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Sitnicki [Wed, 9 Aug 2017 15:39:12 +0000 (17:39 +0200)]
rtnelink: Move link dump consistency check out of the loop
Calls to rtnl_dump_ifinfo() are protected by RTNL lock. So are the
{list,unlist}_netdevice() calls where we bump the net->dev_base_seq
number.
For this reason net->dev_base_seq can't change under out feet while
we're looping over links in rtnl_dump_ifinfo(). So move the check for
net->dev_base_seq change (since the last time we were called) out of the
loop.
This way we avoid giving a wrong impression that there are concurrent
updates to the link list going on while we're iterating over them.
Signed-off-by: Jakub Sitnicki <jkbs@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Intiyaz Basha [Fri, 11 Aug 2017 18:22:09 +0000 (11:22 -0700)]
liquidio: moved ptp_enable to octeon_device structure
ptp_enable was a global static variable. Moved this global variable to
octeon_device structure and removed extra device id check.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
William Tu [Fri, 11 Aug 2017 13:46:39 +0000 (06:46 -0700)]
selftests: bpf: add check for ip XDP redirect
Kernel test robot reports error when running test_xdp_redirect.sh.
Check if ip tool supports xdpgeneric, if not, skip the test.
Signed-off-by: William Tu <u9012063@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bhumika Goyal [Fri, 11 Aug 2017 13:40:42 +0000 (19:10 +0530)]
mlxsw: make mlxsw_config_profile const
Make these structures const as they only stored in the profile field of
a mlxsw_driver structure, which is of type const.
Done using Coccinelle.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joe Perches [Fri, 11 Aug 2017 11:26:26 +0000 (04:26 -0700)]
openvswitch: Remove unnecessary newlines from OVS_NLERR uses
OVS_NLERR already adds a newline so these just add blank
lines to the logging.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Horman [Fri, 11 Aug 2017 08:25:44 +0000 (10:25 +0200)]
nfp: send control message when MAC representors are created
The firmware expects a MAC_REPR control message when a MAC representor
is created. The driver should expect a PORTMOD message to follow which
will provide the link states of the physical port associated with the MAC
representor.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tonghao Zhang [Fri, 11 Aug 2017 03:16:29 +0000 (20:16 -0700)]
net: skb_needs_check() removes CHECKSUM_UNNECESSARY check for tx.
Because we remove the UFO support, we will also remove the
CHECKSUM_UNNECESSARY check in skb_needs_check().
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alexey Khoroshilov [Thu, 10 Aug 2017 22:55:21 +0000 (01:55 +0300)]
wan: dscc4: convert to plain DMA API
Make use the dma_*() interfaces rather than the pci_*() interfaces.
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alexey Khoroshilov [Thu, 10 Aug 2017 22:55:20 +0000 (01:55 +0300)]
wan: dscc4: add checks for dma mapping errors
The driver does not check if mapping dma memory succeed.
The patch adds the checks and failure handling.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Thu, 10 Aug 2017 20:49:10 +0000 (13:49 -0700)]
net: ipv4: set orig_oif based on fib result for local traffic
Attempts to connect to a local address with a socket bound
to a device with the local address hangs if there is no listener:
$ ip addr sh dev eth1
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 02:e0:f9:1c:00:37 brd ff:ff:ff:ff:ff:ff
inet 10.100.1.4/24 scope global eth1
valid_lft forever preferred_lft forever
inet6 2001:db8:1::4/120 scope global
valid_lft forever preferred_lft forever
inet6 fe80::e0:f9ff:fe1c:37/64 scope link
valid_lft forever preferred_lft forever
$ vrf-test -I eth1 -r 10.100.1.4
<hangs when there is no server>
(don't let the command name fool you; vrf-test works without vrfs.)
The problem is that the original intended device, eth1 in this case, is
lost when the tcp reset is sent, so the socket lookup does not find a
match for the reset and the connect attempt hangs. Fix by adjusting
orig_oif for local traffic to the device from the fib lookup result.
With this patch you get the more user friendly:
$ vrf-test -I eth1 -r 10.100.1.4
connect failed: 111: Connection refused
orig_oif is saved to the newly created rtable as rt_iif and when set
it is used as the dif for socket lookups. It is set based on flowi4_oif
passed in to ip_route_output_key_hash_rcu and will be set to either
the loopback device, an l3mdev device, nothing (flowi4_oif = 0 which
is the case in the example above) or a netdev index depending on the
lookup path. In each case, resetting orig_oif to the device in the fib
result for the RTN_LOCAL case allows the actual device to be preserved
as the skb tx and rx is done over the loopback or VRF device.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florinel Iordache [Thu, 10 Aug 2017 13:47:04 +0000 (16:47 +0300)]
fsl/fman: implement several errata workarounds
Implemented workarounds for the following dTSEC Erratum:
A002, A004, A0012, A0014,
A004839 on several operations
that involve MAC CFG register changes: adjust link,
rx pause frames, modify MAC address.
Signed-off-by: Florinel Iordache <florinel.iordache@nxp.com>
Acked-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Thu, 10 Aug 2017 09:56:14 +0000 (12:56 +0300)]
hns3pf: Fix some harmless copy and paste bugs
These were copy and paste bugs, but I believe they are harmless.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Thu, 10 Aug 2017 09:54:59 +0000 (12:54 +0300)]
hns3pf: fix hns3_del_tunnel_port()
This function has a copy and paste bug so it accidentally calls the add
function instead of the delete function.
Fixes:
76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 11 Aug 2017 21:28:59 +0000 (14:28 -0700)]
Merge branch 'rockchip-internal-phy'
David Wu says:
====================
rockchip: Add the integrated PHY support
The rk3228 and rk3328 support integrated PHY inside, let's enable
it to work. And the integrated PHY need to do some special setting,
so register the rockchip integrated PHY driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:02:01 +0000 (22:02 +0800)]
ARM64: dts: rockchip: Enable gmac2phy for rk3328-evb
Enable the gmac2phy, make the gmac2phy work on
the rk3328-evb board.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:01:41 +0000 (22:01 +0800)]
ARM64: dts: rockchip: Add gmac2phy node support for rk3328
The gmac2phy controller of rk3328 is connected to integrated PHY
directly inside, add the node for the integrated PHY support.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:01:08 +0000 (22:01 +0800)]
ARM: dts: rk3228-evb: Enable the integrated PHY for gmac
This patch enables the integrated PHY for rk3228 evb board
by default.
To use the external 1000M PHY on evb board, need to make
some switch of evb board to be on.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:00:52 +0000 (22:00 +0800)]
net: stmmac: dwmac-rk: Add integrated PHY supprot for rk3328
There are two mac controllers in the rk3328, the one connects
to external PHY, and the other one connects to integrated PHY.
Like the mac of external PHY, the integrated PHY's mac also
needs to configure the related mac registers at GRF.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:00:25 +0000 (22:00 +0800)]
net: stmmac: dwmac-rk: Add integrated PHY support for rk3228
There is only one mac controller in rk3228, which could connect to
external PHY or integrated PHY, use the grf_com_mux bit15 to route
external/integrated PHY.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 14:00:02 +0000 (22:00 +0800)]
net: stmmac: dwmac-rk: Add integrated PHY support
To make integrated PHY work, need to configure the PHY clock,
PHY cru reset and related registers.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 13:59:18 +0000 (21:59 +0800)]
Documentation: net: phy: Add phy-is-integrated binding
Add the documentation for integrated PHY. A boolean property indicates
the PHY is integrated into the same physical package as the Ethernet
MAC. If needed, muxers should be configured to ensure the integrated
PHY is used. The absence of this property indicates the muxers should
be configured so that the external PHY is used.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 13:56:43 +0000 (21:56 +0800)]
net: stmmac: dwmac-rk: Remove unwanted code for rk3328_set_to_rmii()
This is wrong setting for rk3328_set_to_rmii(), so remove it.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 13:56:42 +0000 (21:56 +0800)]
arm64: defconfig: Enable CONFIG_ROCKCHIP_PHY
Make the rockchip PHY driver built into the kernel.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 13:56:41 +0000 (21:56 +0800)]
multi_v7_defconfig: Make rockchip PHY built-in
Enable the rockchip PHY driver for multi_v7_defconfig builds.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Wu [Thu, 10 Aug 2017 13:56:40 +0000 (21:56 +0800)]
net: phy: Add rockchip PHY driver support
Support integrated ethernet PHY currently.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Zhu Yanjun [Thu, 10 Aug 2017 08:13:12 +0000 (04:13 -0400)]
forcedeth: replace init_timer_deferrable with setup_deferrable_timer
Replace init_timer_deferrable with setup_deferrable_timer to simplify
the source code.
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Maxim Uvarov [Thu, 10 Aug 2017 07:47:47 +0000 (10:47 +0300)]
drivers: net: davinci_mdio: print bus frequency
Frequency can be adjusted in DT it make sense to
print current used value on driver init.
Signed-off-by: Max Uvarov <muvarov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Maxim Uvarov [Thu, 10 Aug 2017 07:47:46 +0000 (10:47 +0300)]
drivers: net: davinci_mdio: remove busy loop on wait user access
Polling 14 mdio devices on single mdio bus eats 30% of 1Ghz cpu time
due to busy loop in wait(). Add small delay to relax cpu.
Signed-off-by: Max Uvarov <muvarov@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 11 Aug 2017 21:00:14 +0000 (14:00 -0700)]
Merge branch 'netvsc-minor-fixes-and-improvements'
Stephen Hemminger says:
====================
netvsc: minor fixes and improvements
These are non-critical bug fixes, related to functionality now in net-next.
1. delaying the automatic bring up of VF device to allow udev to change name.
2. performance improvement
3. handle MAC address change with VF; mostly propogate the error that VF gives.
4. minor cleanups
5. allow setting send/receive buffer size with ethtool.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:12 +0000 (17:46 -0700)]
netvsc: keep track of some non-fatal overload conditions
Add ethtool statistics for case where send chimmeny buffer is
exhausted and driver has to fall back to doing scatter/gather
send. Also, add statistic for case where ring buffer is full and
receive completions are delayed.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:11 +0000 (17:46 -0700)]
netvsc: allow controlling send/recv buffer size
Control the size of the buffer areas via ethtool ring settings.
They aren't really traditional hardware rings, but host API breaks
receive and send buffer into chunks. The final size of the chunks are
controlled by the host.
The default value of send and receive buffer area for host DMA
is much larger than it needs to be. Experimentation shows that
4M receive and 1M send is sufficient.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:10 +0000 (17:46 -0700)]
netvsc: remove unnecessary check for NULL hdr
The function init_page_array is always called with a valid pointer
to RNDIS header. No check for NULL is needed.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:09 +0000 (17:46 -0700)]
netvsc: remove unnecessary cast of void pointer
Assignment to a typed pointer is sufficient in C.
No cast is needed.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:08 +0000 (17:46 -0700)]
netvsc: whitespace cleanup
Fix some minor indentation issues.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:07 +0000 (17:46 -0700)]
netvsc: no need to allocate send/receive on numa node
The send and receive buffers are both per-device (not per-channel).
The associated NUMA node is a property of the CPU which is per-channel
therefore it makes no sense to force the receive/send buffer to be
allocated on a particular node (since it is a shared resource).
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:06 +0000 (17:46 -0700)]
netvsc: check error return when restoring channels and mtu
If setting new values fails, and the attempt to restore original
settings fails. Then log an error and leave device down.
This should never happen, but if it does don't go down in flames.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:05 +0000 (17:46 -0700)]
netvsc: propagate MAC address change to VF slave
If VF is slaved to synthetic device, then any change to netvsc
MAC address should be propagated to the slave device.
If slave device doesn't support MAC address change then it
should also be an error to attempt to change synthetic NIC MAC
address.
It also fixes the error unwind in the original code.
If give a bad address, the old code would change the device
MAC address anyway.
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:04 +0000 (17:46 -0700)]
netvsc: don't signal host twice if empty
When hv_pkt_iter_next() returns NULL, it has already called
hv_pkt_iter_close(). Calling it twice can lead to extra host signal.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
stephen hemminger [Thu, 10 Aug 2017 00:46:03 +0000 (17:46 -0700)]
netvsc: delay setup of VF device
When VF device is discovered, delay bring it automatically up in
order to allow userspace to some simple changes (like renaming).
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Wed, 9 Aug 2017 21:35:50 +0000 (00:35 +0300)]
phylink: Fix an uninitialized variable bug
"ret" isn't necessarily initialized here.
Fixes:
9525ae83959b ("phylink: add phylink infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Intiyaz Basha [Wed, 9 Aug 2017 20:28:04 +0000 (13:28 -0700)]
liquidio: removed check for queue size alignment
There is no restriction on queue size alignment. Hence removing check for
valid queue size.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Intiyaz Basha [Wed, 9 Aug 2017 19:07:08 +0000 (12:07 -0700)]
liquidio: rx/tx queue cleanup
When deleting a queue, clear its corresponding bit in the qmask, vfree its
memory, clear out the pointer that's pointing to it, and decrement the
queue count.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <fmanlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 11 Aug 2017 20:47:01 +0000 (13:47 -0700)]
Merge branch 'net-sched-let-the-offloader-decide-what-to-offload'
Jiri Pirko says:
====================
net: sched: let the offloader decide what to offload
Currently there is a Qdisc_class_ops->tcf_cl_offload callback
that is called to find out if cls would offload rule or not.
This is only supported by sch_ingress and sch_clsact.
So the Qdisc are to decide. However, the driver knows what is he
able to offload, so move the decision making to drivers completely.
Just pass classid there and provide set of helpers to allow
identification of qdisc.
As a side effect, this actually allows clsact egress rules
offload in mlxsw.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 9 Aug 2017 12:30:35 +0000 (14:30 +0200)]
net: sched: remove cops->tcf_cl_offload
cops->tcf_cl_offload is no longer needed, as the drivers check what they
can and cannot offload using the classid identify helpers. So remove this.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 9 Aug 2017 12:30:34 +0000 (14:30 +0200)]
net: sched: remove handle propagation down to the drivers
There is no longer need to use handle in drivers, so remove it from
tc_cls_common_offload struct.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 9 Aug 2017 12:30:33 +0000 (14:30 +0200)]
net: sched: use newly added classid identity helpers
Instead of checking handle, which does not have the inner class
information and drivers wrongly assume clsact->egress as ingress, use
the newly introduced classid identification helpers.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 9 Aug 2017 12:30:32 +0000 (14:30 +0200)]
net: sched: propagate classid down to offload drivers
Drivers need classid to decide they support this specific qdisc+class
or not. So propagate it down via the tc_cls_common_offload struct.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 9 Aug 2017 12:30:31 +0000 (14:30 +0200)]
net: sched: Add helpers to identify classids
Offloading drivers need to understand what qdisc class a filter is added
to. Currently they only need to identify ingress, clsact->ingress and
clsact->egress. So provide these helpers.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Girish Moodalbail [Wed, 9 Aug 2017 08:09:28 +0000 (01:09 -0700)]
geneve: use netlink_ext_ack for error reporting in rtnl operations
Add extack error messages for failure paths while creating/modifying
geneve devices. Once extack support is added to iproute2, more
meaningful and helpful error messages will be displayed making it easy
for users to discern what went wrong.
Before:
=======
$ ip link add gen1 address 0:1:2:3:4:5:6 type geneve id 200 \
remote 192.168.13.2
RTNETLINK answers: Invalid argument
After:
======
$ ip link add gen1 address 0:1:2:3:4:5:6 type geneve id 200 \
remote 192.168.13.2
Error: Provided link layer address is not Ethernet
Also, netdev_dbg() calls used to log errors associated with Netlink
request have been removed.
Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 11 Aug 2017 17:02:45 +0000 (10:02 -0700)]
Merge branch 'sctp-remove-typedefs-from-structures-part-6'
Xin Long says:
====================
sctp: remove typedefs from structures part 6
As we know, typedef is suggested not to use in kernel, even checkpatch.pl
also gives warnings about it. Now sctp is using it for many structures.
All this kind of typedef's using should be removed. This patchset is the
part 6 to remove all typedefs in include/net/sctp/structs.h, command.h
and sm.h.
Just as the part 1-5, No any code's logic would be changed in these patches,
only cleaning up.
Note that this is the last part for this typedef cleaning up. after this
patchset, no more inappropriate typedefs in sctp. It's also to tidy some
codes when removing them, like fixing many indents, reodering some local
params, especially in the last 2 patches.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:58 +0000 (10:23 +0800)]
sctp: fix some indents in sm_make_chunk.c
There are some bad indents of functions' defination in sm_make_chunk.c.
They have been there since beginning, it was probably caused by that
the typedef sctp_chunk_t was replaced with struct sctp_chunk.
So it's the best time to fix them in this patchset, it's also to fix
some bad indents in other functions' defination in sm_make_chunk.c.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:57 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_disposition_t
This patch is to remove the typedef sctp_disposition_t, and
replace with enum sctp_disposition in the places where it's
using this typedef.
It's also to fix the indent for many functions' defination.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:56 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_sm_table_entry_t
This patch is to remove the typedef sctp_sm_table_entry_t, and
replace with struct sctp_sm_table_entry in the places where it's
using this typedef.
It is also to fix some indents.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:55 +0000 (10:23 +0800)]
sctp: remove the unused typedef sctp_sm_command_t
Remove this typedef including the struct, there is even no places
using it.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:54 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_verb_t
This patch is to remove the typedef sctp_verb_t, and
replace with enum sctp_verb in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:53 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_arg_t
This patch is to remove the typedef sctp_arg_t, and
replace with union sctp_arg in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:52 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_cmd_seq_t
This patch is to remove the typedef sctp_cmd_seq_t, and
replace with struct sctp_cmd_seq in the places where it's
using this typedef.
Note that it doesn't fix many indents although it should,
as sctp_disposition_t's removal would mess them up again.
So better to fix them when removing sctp_disposition_t in
the later patch.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:51 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_cmd_t
This patch is to remove the typedef sctp_cmd_t, and
replace with enum sctp_cmd in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:50 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_socket_type_t
This patch is to remove the typedef sctp_socket_type_t, and
replace with enum sctp_socket_type in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:49 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_dbg_objcnt_entry_t
This patch is to remove the typedef sctp_dbg_objcnt_entry_t, and
replace with struct sctp_dbg_objcnt_entry in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:48 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_cmsgs_t
This patch is to remove the typedef sctp_cmsgs_t, and
replace with struct sctp_cmsgs in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:47 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_endpoint_type_t
This patch is to remove the typedef sctp_endpoint_type_t, and
replace with enum sctp_endpoint_type in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:46 +0000 (10:23 +0800)]
sctp: remove the typedef sctp_sender_hb_info_t
This patch is to remove the typedef sctp_sender_hb_info_t, and
replace with struct sctp_sender_hb_info in the places where it's
using this typedef.
It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 11 Aug 2017 02:23:45 +0000 (10:23 +0800)]
sctp: remove the unused typedef sctp_packet_phandler_t
Remove this function typedef, there is even no places
using it.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 10 Aug 2017 19:11:16 +0000 (12:11 -0700)]
Merge git://git./linux/kernel/git/davem/net
Mainline had UFO fixes, but UFO is removed in net-next so we
take the HEAD hunks.
Minor context conflict in bcmsysport statistics bug fix.
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Thu, 10 Aug 2017 17:30:29 +0000 (10:30 -0700)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) Fix handling of initial STATE message in TIPC, from Jon Paul Maloy.
2) Fix stats handling in bcm_sysport_get_stats(), from Florian
Fainelli.
3) Reject
16777215 VNI value in geneve_validate(), from Girish
Moodalbail.
4) Fix initial IGMP sysctl setting regression, from Nikolay Borisov.
5) Once a UFO fragmented frame is treated as UFO, we should continue
doing so. Likewise once a frame has been segmented, we should
continue doing that and not try to convert it to a UFO frame. From
Willem de Bruijn.
6) Test the AF_PACKET RX/TX ring pg_vec state under the socket lock to
prevent races. From Willem de Bruijn.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
packet: fix tp_reserve race in packet_set_ring
udp: consistently apply ufo or fragmentation
net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
igmp: Fix regression caused by igmp sysctl namespace code.
geneve: maximum value of VNI cannot be used
net: systemport: Fix software statistics for SYSTEMPORT Lite
tipc: remove premature ESTABLISH FSM event at link synchronization
Willem de Bruijn [Thu, 10 Aug 2017 16:41:58 +0000 (12:41 -0400)]
packet: fix tp_reserve race in packet_set_ring
Updates to tp_reserve can race with reads of the field in
packet_set_ring. Avoid this by holding the socket lock during
updates in setsockopt PACKET_RESERVE.
This bug was discovered by syzkaller.
Fixes:
8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Thu, 10 Aug 2017 16:29:19 +0000 (12:29 -0400)]
udp: consistently apply ufo or fragmentation
When iteratively building a UDP datagram with MSG_MORE and that
datagram exceeds MTU, consistently choose UFO or fragmentation.
Once skb_is_gso, always apply ufo. Conversely, once a datagram is
split across multiple skbs, do not consider ufo.
Sendpage already maintains the first invariant, only add the second.
IPv6 does not have a sendpage implementation to modify.
A gso skb must have a partial checksum, do not follow sk_no_check_tx
in udp_send_skb.
Found by syzkaller.
Fixes:
e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 10 Aug 2017 16:50:22 +0000 (09:50 -0700)]
Merge branch 'rtnetlink-fix-initial-rtnl-pushdown-fallout'
Florian Westphal says:
====================
rtnetlink: fix initial rtnl pushdown fallout
This series fixes various bugs and splats reported since the
allow-handler-to-run-with-no-rtnl series went in.
Last patch adds a script that can be used to add further
tests in case more bugs are reported.
In case you prefer reverting the original series instead of
fixing fallout I can resend this patch on its own.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:53:02 +0000 (16:53 +0200)]
selftests: add rtnetlink test script
add a simple script to exercise some rtnetlink call paths, so KASAN,
lockdep etc. can yell at developer before patches are sent upstream.
This can be extended to also cover bond, team, vrf and the like.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:53:01 +0000 (16:53 +0200)]
rtnetlink: fallback to UNSPEC if current family has no doit callback
We need to use PF_UNSPEC in case the requested family has no doit
callback, otherwise this now fails with EOPNOTSUPP instead of running the
unspec doit callback, as before.
Fixes:
6853dd488119 ("rtnetlink: protect handler table with rcu")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:53:00 +0000 (16:53 +0200)]
rtnetlink: init handler refcounts to 1
If using CONFIG_REFCOUNT_FULL=y we get following splat:
refcount_t: increment on 0; use-after-free.
WARNING: CPU: 0 PID: 304 at lib/refcount.c:152 refcount_inc+0x47/0x50
Call Trace:
rtnetlink_rcv_msg+0x191/0x260
...
This warning is harmless (0 is "no callback running", not "memory
was freed").
Use '1' as the new 'no handler is running' base instead of 0 to avoid
this.
Fixes:
019a316992ee ("rtnetlink: add reference counting to prevent module unload while dump is in progress")
Reported-by: Sabrina Dubroca <sdubroca@redhat.com>
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:52:59 +0000 (16:52 +0200)]
rtnetlink: switch rtnl_link_get_slave_info_data_size to rcu
David Ahern reports following splat:
RTNL: assertion failed at net/core/dev.c (5717)
netdev_master_upper_dev_get+0x5f/0x70
if_nlmsg_size+0x158/0x240
rtnl_calcit.isra.26+0xa3/0xf0
rtnl_link_get_slave_info_data_size currently assumes RTNL protection, but
there appears to be no hard requirement for this, so use rcu instead.
At the time of this writing, there are three 'get_slave_size' callbacks
(now invoked under rcu): bond_get_slave_size, vrf_get_slave_size and
br_port_get_slave_size, all return constant only (i.e. they don't sleep).
Fixes:
6853dd488119 ("rtnetlink: protect handler table with rcu")
Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:52:58 +0000 (16:52 +0200)]
rtnetlink: do not use RTM_GETLINK directly
Userspace sends RTM_GETLINK type, but the kernel substracts
RTM_BASE from this, i.e. 'type' doesn't contain RTM_GETLINK
anymore but instead RTM_GETLINK - RTM_BASE.
This caused the calcit callback to not be invoked when it
should have been (and vice versa).
While at it, also fix a off-by one when checking family index. vs
handler array size.
Fixes:
e1fa6d216dd ("rtnetlink: call rtnl_calcit directly")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Westphal [Thu, 10 Aug 2017 14:52:57 +0000 (16:52 +0200)]
rtnetlink: use rcu_dereference_raw to silence rcu splat
Ido reports a rcu splat in __rtnl_register.
The splat is correct; as rtnl_register doesn't grab any logs
and doesn't use rcu locks either. It has always been like this.
handler families are not registered in parallel so there are no
races wrt. the kmalloc ordering.
The only reason to use rcu_dereference in the first place was to
avoid sparse from complaining about this.
Thus this switches to _raw() to not have rcu checks here.
The alternative is to add rtnl locking to register/unregister,
however, I don't see a compelling reason to do so as this has been
lockless for the past twenty years or so.
Fixes:
6853dd4881 ("rtnetlink: protect handler table with rcu")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Thu, 10 Aug 2017 16:36:06 +0000 (09:36 -0700)]
Merge git://git./linux/kernel/git/davem/sparc
Pull sparc updates from David Miller:
1) Recognize M8 cpus, just basic chip ID matching, from Allen Pais.
2) Prevent crashes when bringing up sunvdc virtual block devices in
some environments. From Jim Quigley.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain
sparc64: Increase max_phys_bits to 51 and VA bits to 53 for M8.
sparc64: recognize and support sparc M8 cpu type
sparc64: properly name the cpu constants
John Crispin [Thu, 10 Aug 2017 08:09:03 +0000 (10:09 +0200)]
net: core: fix compile error inside flow_dissector due to new dsa callback
The following error was introduced by
commit
43e665287f93 ("net-next: dsa: fix flow dissection")
due to a missing #if guard
net/core/flow_dissector.c: In function '__skb_flow_dissect':
net/core/flow_dissector.c:448:18: error: 'struct net_device' has no member named 'dsa_ptr'
ops = skb->dev->dsa_ptr->tag_ops;
^
make[3]: *** [net/core/flow_dissector.o] Error 1
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 10 Aug 2017 05:51:47 +0000 (22:51 -0700)]
Merge branch 'dsa-flow-dissection'
John Crispin says:
====================
net-next: dsa: fix flow dissection
RPS and probably other kernel features are currently broken on some if not
all DSA devices. The root cause of this is that skb_hash will call the
flow_dissector. At this point the skb still contains the magic switch
header and the skb->protocol field is not set up to the correct 802.3
value yet. By the time the tag specific code is called, removing the header
and properly setting the protocol an invalid hash is already set. In the
case of the mt7530 this will result in all flows always having the same
hash.
Changes since RFC:
* use a callback instead of static values
* add cover letter
====================
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
John Crispin [Wed, 9 Aug 2017 12:41:19 +0000 (14:41 +0200)]
net-next: dsa: fix flow dissection
RPS and probably other kernel features are currently broken on some if not
all DSA devices. The root cause of this is that skb_hash will call the
flow_dissector. At this point the skb still contains the magic switch
header and the skb->protocol field is not set up to the correct 802.3
value yet. By the time the tag specific code is called, removing the header
and properly setting the protocol an invalid hash is already set. In the
case of the mt7530 this will result in all flows always having the same
hash.
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
John Crispin [Wed, 9 Aug 2017 12:41:18 +0000 (14:41 +0200)]
net-next: tag_mtk: add flow_dissect callback to the ops struct
The MT7530 inserts the 4 magic header in between the 802.3 address and
protocol field. The patch implements the callback that can be called by
the flow dissector to figure out the real protocol and offset of the
network header. With this patch applied we can properly parse the packet
and thus make hashing function properly.
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
John Crispin [Wed, 9 Aug 2017 12:41:17 +0000 (14:41 +0200)]
net-next: dsa: add flow_dissect callback to struct dsa_device_ops
When the flow dissector first sees packets coming in on a DSA devices the
802.3 header wont be located where the code expects it to be as the tag
is still present. Adding this new callback allows a DSA device to provide a
new function that the flow_dissector can use to get the correct protocol
and offset of the network header.
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
John Crispin [Wed, 9 Aug 2017 12:41:16 +0000 (14:41 +0200)]
net-next: dsa: move struct dsa_device_ops to the global header file
We need to access this struct from within the flow_dissector to fix
dissection for packets coming in on DSA devices.
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>