Yunsheng Lin [Fri, 6 Jul 2018 10:28:02 +0000 (11:28 +0100)]
net: hns3: Fix get_vector ops in hclgevf_main module
The hclgevf_free_vector function expects the caller to pass
the vector_id to it, and hclgevf_put_vector pass vector to
it now, which will cause vector allocation problem.
This patch fixes it by converting vector into vector_id before
calling hclgevf_free_vector.
Fixes:
e2cb1dec9779 ("net: hns3: Add HNS3 VF HCL(Hardware Compatibility Layer) Support")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 6 Jul 2018 10:28:01 +0000 (11:28 +0100)]
net: hns3: Fix warning bug when doing lp selftest
The napi_alloc_skb is excepted to be called under the
non-preemptible code path when it is called by hns3_clean_rx_ring
during loopback selftest, otherwise the below warning will be
logged:
[ 92.420780] BUG: using smp_processor_id() in preemptible
[
00000000] code: ethtool/1873
<SNIP>
[ 92.463202] check_preemption_disabled+0xf8/0x100
[ 92.467893] debug_smp_processor_id+0x1c/0x28
[ 92.472239] __napi_alloc_skb+0x30/0x130
[ 92.476158] hns3_clean_rx_ring+0x118/0x5f0 [hns3]
[ 92.480941] hns3_self_test+0x32c/0x4d0 [hns3]
[ 92.485375] ethtool_self_test+0xdc/0x1e8
[ 92.489372] dev_ethtool+0x1020/0x1da8
[ 92.493109] dev_ioctl+0x188/0x3a0
[ 92.496499] sock_do_ioctl+0xf4/0x208
[ 92.500148] sock_ioctl+0x228/0x3e8
[ 92.503626] do_vfs_ioctl+0xc4/0x880
[ 92.507189] SyS_ioctl+0x94/0xa8
[ 92.510404] el0_svc_naked+0x30/0x34
This patch fix it by disabling preemption when calling
hns3_clean_rx_ring during loopback selftest.
Fixes:
c39c4d98dc65 ("net: hns3: Add mac loopback selftest support in hns3 driver")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jian Shen [Fri, 6 Jul 2018 10:28:00 +0000 (11:28 +0100)]
net: hns3: Add configure for mac minimal frame size
When change the mtu, the minimal frame size of mac will be set
to zero, it is incorrect. This patch fixes it by set it to the
default value.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Fri, 6 Jul 2018 10:27:59 +0000 (11:27 +0100)]
net: hns3: Fix for mailbox message truncated problem
The payload of mailbox message is 16 byte and the value of
HCLGE_MBX_MAX_ARQ_MSG_SIZE is 8. A message truncated problem will
happen when mailbox message is converted to ARQ message. This patch
replaces HCLGE_MBX_MAX_ARQ_MSG_SIZE with the size of ARQ message in
hclgevf_mbx_handler to fix this problem.
Fixes:
b11a0bb231f3 ("net: hns3: Add mailbox support to VF driver")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 6 Jul 2018 10:27:58 +0000 (11:27 +0100)]
net: hns3: Fix for l4 checksum offload bug
Hardware only support tcp/udp/sctp l4 checksum offload, but
the driver currently tell hardware to do l4 checksum offlad when
l3 is IPv4 or IPv6, which may cause checksumm error.
This patch fixes it by only enabling the l4 offload when l4 is
tcp/udp/sctp.
Fixes:
76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 6 Jul 2018 10:27:57 +0000 (11:27 +0100)]
net: hns3: Fix for waterline not setting correctly
The HCLGE_RX_PRIV_EN_B is used to tell the firmware whether
to update the specific waterline value, if the is not set,
the firmware will ignore the value.
This patch fixes by setting the HCLGE_RX_PRIV_EN_B even if
the updated value is zero.
Fixes:
46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 6 Jul 2018 10:27:56 +0000 (11:27 +0100)]
net: hns3: Fix for mac pause not disable in pfc mode
When pfc pause mode is enable, the mac pause mode need to be
disabled, otherwise the pfc pause packet will not be sent when
congestion happens.
This patch fixes by disabling the mac pause when pfc pause is
enabled.
Fixes:
848440544b41 ("net: hns3: Add support of TX Scheduler & Shaper to HNS3 driver")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 6 Jul 2018 10:27:55 +0000 (11:27 +0100)]
net: hns3: Fix tc setup when netdev is first up
Currently, tc related configuration is not setup when the
netdev is first up, which cause the stack only using tc 0
problem.
This patch fixes it by setting the tc related configuration
using the info from NCL_CONFIG when netdev is first up.
Fixes:
76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rick Farrington [Fri, 6 Jul 2018 18:27:07 +0000 (11:27 -0700)]
liquidio: fix kernel panic when NIC firmware is older than 1.7.2
Pre-1.7.2 NIC firmware does not support (and does not respond to) the "get
speed" command which is sent by the 1.7.2 driver (for CN23XX-225 cards
only) during modprobe. Due to a bug in older firmware (with respect to
unknown commands), this unsupported command causes a cascade of errors that
ends in a kernel panic.
Fix it by making the sending of the "get speed" command conditional on the
firmware version.
Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 7 Jul 2018 01:58:50 +0000 (10:58 +0900)]
Merge branch 'sock-cookie-initializers'
Willem de Bruijn says:
====================
sock cookie initializers
Recent UDP GSO and SO_TXTIME features added new fields to cookie
structs.
When adding a field, all sites where a struct is initialized have to
be updated, which is a lot of boilerplate. Alternatively, a field can
be initialized selectively, but this is fragile. I introduced a bug
in udp gso where an uninitialized field was read. See also fix commit
("
9887cba19978 ip: limit use of gso_size to udp").
Introduce initializers for structs ipcm(6)_cookie and sockc_cookie.
patch 1..3 do exactly this.
patch 4..5 make ipv4 and ipv6 handle cookies the same way and
remove some boilerplate in doing so.
patch 6 removes the udp gso branch that needed the above fix
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:59 +0000 (10:12 -0400)]
ip: unconditionally set cork gso_size
Now that ipc(6)->gso_size is correctly initialized in all callers of
ip(6)_setup_cork, it is safe to unconditionally pass it to the cork.
Link: http://lkml.kernel.org/r/20180619164752.143249-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:58 +0000 (10:12 -0400)]
ip: remove tx_flags from ipcm_cookie and use same logic for v4 and v6
skb_shinfo(skb)->tx_flags is derived from sk->sk_tsflags, possibly
after modification by __sock_cmsg_send, by calling sock_tx_timestamp.
The IPv4 and IPv6 paths do this conversion differently. In IPv4, the
individual protocols that support tx timestamps call this function
and store the result in ipc.tx_flags. In IPv6, sock_tx_timestamp is
called in __ip6_append_data.
There is no need to store both tx_flags and ts_flags in the cookie
as one is derived from the other. Convert when setting up the cork
and remove the redundant field. This is similar to IPv6, only have
the conversion happen only once per datagram, in ip(6)_setup_cork.
Also change __ip6_append_data to match __ip_append_data. Only update
tskey if timestamping is enabled with OPT_ID. The SOCK_.. test is
redundant: only valid protocols can have non-zero cork->tx_flags.
After this change the IPv4 and IPv6 logic is the same.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:57 +0000 (10:12 -0400)]
ipv6: fold sockcm_cookie into ipcm6_cookie
ipcm_cookie includes sockcm_cookie. Do the same for ipcm6_cookie.
This reduces the number of arguments that need to be passed around,
applies ipcm6_init to all cookie fields at once and reduces code
differentiation between ipv4 and ipv6.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:56 +0000 (10:12 -0400)]
sock: sockc cookie initializer
Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit
9887cba19978 ("ip: limit use of gso_size to udp").
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:55 +0000 (10:12 -0400)]
ipv6: ipcm6_cookie initializer
Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit
9887cba19978 ("ip: limit use of gso_size to udp").
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Willem de Bruijn [Fri, 6 Jul 2018 14:12:54 +0000 (10:12 -0400)]
ipv4: ipcm_cookie initializers
Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit
9887cba19978 ("ip: limit use of gso_size to udp").
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 6 Jul 2018 02:19:08 +0000 (11:19 +0900)]
Merge branch 'IP-listification-follow-ups'
Edward Cree says:
====================
IP listification follow-ups
While working on IPv6 list processing, I found another bug in the IPv4
version. So this patch series has that fix, and the IPv6 version with
both fixes incorporated.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Thu, 5 Jul 2018 14:49:42 +0000 (15:49 +0100)]
net: ipv6: listify ipv6_rcv() and ip6_rcv_finish()
Essentially the same as the ipv4 equivalents.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Thu, 5 Jul 2018 14:47:39 +0000 (15:47 +0100)]
net: ipv4: fix list processing on L3 slave devices
If we have an L3 master device, l3mdev_ip_rcv() will steal the skb, but
we were returning NET_RX_SUCCESS from ip_rcv_finish_core() which meant
that ip_list_rcv_finish() would keep it on the list. Instead let's
move the l3mdev_ip_rcv() call into the caller, so that our response to
a steal can be different in the single packet path (return
NET_RX_SUCCESS) and the list path (forget this packet and continue).
Fixes:
5fa12739a53d ("net: ipv4: listify ip_rcv_finish")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gustavo A. R. Silva [Wed, 4 Jul 2018 22:34:37 +0000 (17:34 -0500)]
net: core: filter: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Warning level 2 was used: -Wimplicit-fallthrough=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gustavo A. R. Silva [Wed, 4 Jul 2018 22:05:00 +0000 (17:05 -0500)]
net: decnet: dn_nsp_in: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gustavo A. R. Silva [Wed, 4 Jul 2018 21:13:59 +0000 (16:13 -0500)]
tipc: mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Warning level 2 was used: -Wimplicit-fallthrough=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ganesh Goudar [Wed, 4 Jul 2018 12:19:33 +0000 (17:49 +0530)]
cxgb4: Fix the condition to check if the card is T5
Use 'chip_ver' rather than 'chip' to check if the card
is T5.
Fixes:
e8d452923ae6 ("cxgb4: clean up init_one")
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 11:05:25 +0000 (12:05 +0100)]
net: ethernet: sun: remove redundant variables adv and lpa and mii_reads
Variables adv and lpa are being assigned but are never used hence they
are redundant and can be removed. Also remove the unncessary mii_reads
too.
Cleans up clang warnings:
warning: variable 'lpa' set but not used [-Wunused-but-set-variable]
warning: variable 'adv' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 5 Jul 2018 11:05:55 +0000 (20:05 +0900)]
Merge branch 'net-ethernet-Miscellaneous-Kconfig-and-Makefile-cleanups'
Geert Uytterhoeven says:
====================
net: ethernet: Miscellaneous Kconfig and Makefile cleanups
This patch series contains a few Kconfig and Makefile cleanups w.r.t.
Ethernet vendors.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Geert Uytterhoeven [Wed, 4 Jul 2018 11:50:13 +0000 (13:50 +0200)]
net: ethernet: sfc: Make subdir logic consistent with other vendors
Both SFC and SFC_FALCON depend on NET_VENDOR_SOLARFLARE, hence use the
latter to decide whether to descend into the sfc subdirectory.
Move the rule to descend into sfc/falcon to the sfc subdirectory.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Martin Habets <mhabets@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Geert Uytterhoeven [Wed, 4 Jul 2018 11:50:12 +0000 (13:50 +0200)]
net: ethernet: Add missing VENDOR to Cadence and Packet Engines symbols
The vendor guard Kconfig symbols for Cadence and Packet Engines use a
"NET_" prefix, while all other vendor guards use a "NET_VENDOR_"
prefix. Hence make them consistent with the rest, and add the missing
trailing "S" for Packet Engines while at it.
As these options don't directly affect the kernel build, and default to
"y", this change has no impact on kernels built with existing
(def)configs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
Geert Uytterhoeven [Wed, 4 Jul 2018 11:50:11 +0000 (13:50 +0200)]
net: ethernet: Make NET_VENDOR_AURORA default to yes
Enabling NET_VENDOR_* Kconfig options does not directly affect the
kernel build. Hence NET_VENDOR_AURORA should default to yes, like other
NET_VENDOR_* options.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 11:45:53 +0000 (12:45 +0100)]
qlogic: netxen: remove various redundant variables
Variables consumer, cmd_desc, end_cnt and no_of_desc are being assigned
but are never used hence they are redundant and can be removed.
Cleans up clang warnings:
warning: variable 'consumer' set but not used [-Wunused-but-set-variable]
warning: variable 'cmd_desc' set but not used [-Wunused-but-set-variable]
warning: variable 'end_cnt' set but not used [-Wunused-but-set-variable]
warning: variable 'no_of_desc' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 5 Jul 2018 10:58:36 +0000 (19:58 +0900)]
Merge branch 'devlink-Add-configuration-parameters-support'
Moshe Shemesh says:
====================
Add configuration parameters support
Add configuration parameters setting through devlink.
Each device registers supported configuration parameters table.
Each parameter can be either generic or driver specific.
The user can retrieve data on these parameters by "devlink param show"
command and can set new value to a parameter by "devlink param set"
command.
The parameters can be set in different configuration modes:
runtime - set while driver is running, no reset required.
driverinit - applied while driver initializes, requires restart
driver by devlink reload command.
permanent - written to device's non-volatile memory, hard reset required.
The patches at the end of the patchset introduce few params that are using
the introduced infrastructure on mlx4 and bnxt.
Command examples and output:
pci/0000:81:00.0:
name internal_error_reset type generic
values:
cmode runtime value true
cmode driverinit value true
name max_macs type generic
values:
cmode driverinit value 128
name enable_64b_cqe_eqe type driver-specific
values:
cmode driverinit value true
name enable_4k_uar type driver-specific
values:
cmode driverinit value false
pci/0000:81:00.0:
name internal_error_reset type generic
values:
cmode runtime value false
cmode driverinit value true
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Vasundhara Volam [Wed, 4 Jul 2018 11:30:37 +0000 (14:30 +0300)]
bnxt_en: Add bnxt_en initial params table and register it.
Create initial devlink parameters table for bnxt_en.
Table consists of a permanent generic parameter.
enable_sriov - Enables Single-Root Input/Output Virtualization(SR-IOV)
characteristic of the device.
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vasundhara Volam [Wed, 4 Jul 2018 11:30:36 +0000 (14:30 +0300)]
devlink: Add enable_sriov boolean generic parameter
enable_sriov - Enables Single-Root Input/Output Virtualization(SR-IOV)
characteristic of the device.
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:35 +0000 (14:30 +0300)]
mlx4: Add support for devlink reload and load driverinit values
Add mlx4_devlink_reload() to support devlink reload operation.
Add mlx4_devlink_param_load_driverinit_values() to load values which
were set using driverinit configuration mode.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:34 +0000 (14:30 +0300)]
mlx4: Add mlx4 initial parameters table and register it
Create initial parameters table for mlx4.
The table consists of two generic parameters and two driver-specific
parameters.
Generic:
internal_err_reset - Enable reset device on internal errors. This
parameter can be configured on mlx4 either on runtime or during driver
initialization.
max_macs - Max number of MACs per ETH port. For mlx4 this parameter
value range is between 1 and 128. This parameter can be configured on
mlx4 only during driver initialization.
Driver specific:
enable_64b_cqe_eqe - Enable 64 byte CQEs/EQEs when the FW supports it.
This parameter can be configured on mlx4 only during driver
initialization.
enable_4k_uar - Enable using 4K UAR. This parameter can be configured on
mlx4 only during driver initialization.
Register the parameters table on mlx4_init_one() and unregister on
mlx4_remove_one().
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:33 +0000 (14:30 +0300)]
devlink: Add generic parameters internal_err_reset and max_macs
Add 2 first generic parameters to devlink configuration parameters set:
internal_err_reset - When set enables reset device on internal errors.
max_macs - max number of MACs per ETH port.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:32 +0000 (14:30 +0300)]
devlink: Add devlink notifications support for params
Add devlink_param_notify() function to support devlink param notifications.
Add notification call to devlink param set, register and unregister
functions.
Add devlink_param_value_changed() function to enable the driver notify
devlink on value change. Driver should use this function after value was
changed on any configuration mode part to driverinit.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:31 +0000 (14:30 +0300)]
devlink: Add support for get/set driverinit value
"driverinit" configuration mode value is held by devlink to enable
the driver query the value after reload. Two additional functions
added to help the driver get/set the value from/to devlink:
devlink_param_driverinit_value_set() and
devlink_param_driverinit_value_get().
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:30 +0000 (14:30 +0300)]
devlink: Add param set command
Add param set command to set value for a parameter.
Value can be set to any of the supported configuration modes.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:29 +0000 (14:30 +0300)]
devlink: Add param get command
Add param get command which gets data per parameter.
Option to dump the parameters data per device.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Wed, 4 Jul 2018 11:30:28 +0000 (14:30 +0300)]
devlink: Add devlink_param register and unregister
Define configuration parameters data structure.
Add functions to register and unregister the driver supported
configuration parameters table.
For each parameter registered, the driver should fill all the parameter's
fields. In case the only supported configuration mode is "driverinit"
the parameter's get()/set() functions are not required and should be set
to NULL, for any other configuration mode, these functions are required
and should be set by the driver.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 10:11:07 +0000 (11:11 +0100)]
net/hamradio/6pack: remove redundant variable channel
Variable channel is being assigned but is never used hence it is
redundant and can be removed.
Cleans up two clang warnings:
warning: variable 'channel' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 10:05:32 +0000 (11:05 +0100)]
fjes: use currently unused variable my_epid and max_epid
Variables my_epid and max_epid are currently assigned and not being
used - however, I suspect they were intended to be used in the for-loops
to reduce the dereferencing of hw. Replace hw->my_epid and hw->max_epid
with these variables.
Cleans up clang warnings:
warning: variable 'my_epid' set but not used [-Wunused-but-set-variable]
variable 'max_epid' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 09:55:49 +0000 (10:55 +0100)]
net: tehuti: remove redundant pointer skb
Pointer skb is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'skb' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 09:26:13 +0000 (10:26 +0100)]
net: socionext: remove redundant pointer ndev
Pointer ndev is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'ndev' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Wei Yongjun [Thu, 5 Jul 2018 09:00:10 +0000 (09:00 +0000)]
net: aquantia: Make some functions static
Fixes the following sparse warnings:
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c:525:5: warning:
symbol 'hw_atl_utils_mpi_set_speed' was not declared. Should it be static?
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c:536:5: warning:
symbol 'hw_atl_utils_mpi_set_state' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Wei Yongjun [Thu, 5 Jul 2018 08:59:09 +0000 (08:59 +0000)]
net: dsa: vsc73xx: Make some functions static
Fixes the following sparse warnings:
drivers/net/dsa/vitesse-vsc73xx.c:1054:6: warning:
symbol 'vsc73xx_get_strings' was not declared. Should it be static?
drivers/net/dsa/vitesse-vsc73xx.c:1113:5: warning:
symbol 'vsc73xx_get_sset_count' was not declared. Should it be static?
drivers/net/dsa/vitesse-vsc73xx.c:1122:6: warning:
symbol 'vsc73xx_get_ethtool_stats' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Thu, 5 Jul 2018 08:30:04 +0000 (09:30 +0100)]
net: dsa: fix spelling mistake "waitting" -> "waiting"
Trivial fix to spelling mistake in dev_err error message.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Li RongQing [Thu, 5 Jul 2018 06:34:32 +0000 (14:34 +0800)]
net: limit each hash list length to MAX_GRO_SKBS
After commit
07d78363dcff ("net: Convert NAPI gro list into a small hash
table.")' there is 8 hash buckets, which allows more flows to be held for
merging. but MAX_GRO_SKBS, the total held skb for merging, is 8 skb still,
limit the hash table performance.
keep MAX_GRO_SKBS as 8 skb, but limit each hash list length to 8 skb, not
the total 8 skb
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Wed, 4 Jul 2018 19:11:29 +0000 (21:11 +0200)]
r8169: fix runtime suspend
When runtime-suspending we configure WoL w/o touching saved_wolopts.
If saved_wolopts == 0 we would power down the PHY in this case what's
wrong. Therefore we have to check the actual chip WoL settings here.
Fixes:
433f9d0ddcc6 ("r8169: improve saved_wolopts handling")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Wed, 4 Jul 2018 18:23:50 +0000 (19:23 +0100)]
net: ipv4: fix drop handling in ip_list_rcv() and ip_list_rcv_finish()
Since callees (ip_rcv_core() and ip_rcv_finish_core()) might free or steal
the skb, we can't use the list_cut_before() method; we can't even do a
list_del(&skb->list) in the drop case, because skb might have already been
freed and reused.
So instead, take each skb off the source list before processing, and add it
to the sublist afterwards if it wasn't freed or stolen.
Fixes:
5fa12739a53d net: ipv4: listify ip_rcv_finish
Fixes:
17266ee93984 net: ipv4: listified version of ip_rcv
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Casey Leedom [Wed, 4 Jul 2018 09:42:56 +0000 (15:12 +0530)]
cxgb4: Add support to read actual provisioned resources
In highly constrained resources environments (like the 124VF
T5 and 248VF T6 configurations), PF4 may not have very many
resources at all and we need to adapt to whatever we've been
allocated, this patch adds support to get the provisioned
resources.
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 12:19:29 +0000 (13:19 +0100)]
epic100: remove redundant variable 'irq'
Variable 'irq' is being assigned but is never used hence it is
and can be removed.
Cleans up clang warning:
warning: variable 'irq' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 12:13:01 +0000 (13:13 +0100)]
sfc: remove redundant variable old_vlan
Variable old_vlan is being assigned but is never used hence it is
and can be removed.
Cleans up clang warning:
warning: variable 'old_vlan' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 12:06:26 +0000 (13:06 +0100)]
qed: remove redundant pointer 'name'
Pointer 'name' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'name' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 11:20:44 +0000 (12:20 +0100)]
ethernet: micrel: remove redundant pointer 'info'
Pointer 'info' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'info' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 08:06:27 +0000 (09:06 +0100)]
net: hinic: remove redundant pointer pfhwdev
Pointer pfhwdev is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'pfhwdev' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:59:25 +0000 (08:59 +0100)]
net: hns3: remove redundant variable 'protocol'
Variable 'protocol' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'protocol' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:54:55 +0000 (08:54 +0100)]
net: ethernet: gianfar_ethtool: remove redundant variable last_rule_idx
Variable last_rule_idx is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'last_rule_idx' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:49:43 +0000 (08:49 +0100)]
net: fec: remove redundant variable 'inc'
Variable 'inc' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'inc' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:39:12 +0000 (08:39 +0100)]
cnic: remove redundant pointer req and variable func
Pointer req and variable func are being assigned but are never used
hence they are redundant and can be removed.
Cleans up clang warnings:
warning: variable 'req' set but not used [-Wunused-but-set-variable]
warning: variable 'func' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:30:43 +0000 (08:30 +0100)]
net: bgmac: remove redundant variable 'freed'
Variable 'freed' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'freed' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:20:20 +0000 (08:20 +0100)]
net: ethernet: nb8800: remove redundant pointer rxd
Pointer rxd is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'rxb' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:15:30 +0000 (08:15 +0100)]
net: alx: remove redundant variable old_duplex
Variable old_duplex is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'old_duplex' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 07:01:35 +0000 (08:01 +0100)]
net: alteon: acenic: remove redundant pointer rxdesc
Pointer rxdesc is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'rxdesc' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Wed, 4 Jul 2018 06:54:36 +0000 (07:54 +0100)]
net: dsa: bcm_sf2: remove redundant variable off
Variable 'off' is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'off' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jul 2018 13:30:28 +0000 (22:30 +0900)]
Merge branch 'Scheduled-packet-Transmission-ETF'
Jesus Sanchez-Palencia says:
====================
Scheduled packet Transmission: ETF
Changes since v1:
- moved struct sock_txtime from socket.h to uapi net_tstamp.h;
- sk_clockid was changed from u16 to u8;
- sk_txtime_flags was changed from u16 to a u8 bit field in struct sock;
- the socket option flags are now validated in sock_setsockopt();
- added SO_EE_ORIGIN_TXTIME;
- sockc.transmit_time is now initialized from all IPv4 Tx paths;
- added support for the IPv6 Tx path;
Overview
========
This work consists of a set of kernel interfaces that can be used by
applications that require (time-based) Scheduled Tx of packets.
It is comprised by 3 new components to the kernel:
- SO_TXTIME: socket option + cmsg programming interfaces.
- etf: the "earliest txtime first" qdisc, that provides per-queue
TxTime-based scheduling. This has been renamed from 'tbs' to
'etf' to better describe its functionality.
- taprio: the "time-aware priority scheduler" qdisc, that provides
per-port Time-Aware scheduling;
This patchset is providing the first 2 components, which have been
developed for longer. The taprio qdisc will be shared as an RFC separately
(shortly).
Note that this series is a follow up of the "Time based packet
transmission" RFCv3 [1].
etf (formerly known as 'tbs')
=============================
For applications/systems that the concept of time slices isn't precise
enough, the etf qdisc allows applications to control the instant when
a packet should leave the network controller. When used in conjunction
with taprio, it can also be used in case the application needs to
control with greater guarantee the offset into each time slice a packet
will be sent. Another use case of etf, is when only a small number of
applications on a system are time sensitive, so it can then be used
with a more traditional root qdisc (like mqprio).
The etf qdisc is designed so it buffers packets until a configurable
time before their deadline (Tx time). The qdisc uses a rbtree internally
so the buffered packets are always 'ordered' by their txtime (deadline)
and will be dequeued following the earliest txtime first.
It relies on the SO_TXTIME API set for receiving the per-packet timestamp
(txtime) as well as the config flags for each socket: the clockid to be
used as a reference, if the expected mode of txtime for that socket is
deadline or strict mode, and if packet drops should be reported on the
socket's error queue or not.
The qdisc will drop any packets with a Tx time in the past, or if a
packet expires while waiting for being dequeued. Drops can be reported
as errors back to userspace through the socket's error queue.
Example configuration:
$ tc qdisc add dev enp2s0 parent 100:1 etf offload delta 200000 \
clockid CLOCK_TAI
Here, the Qdisc will use HW offload for the txtime control.
Packets will be dequeued by the qdisc "delta" (200000) nanoseconds before
their transmission time. Because this will be using HW offload and
since dynamic clocks are not supported by hrtimers, the system clock
and the PHC clock must be synchronized for this mode to behave as expected.
A more complete example can be found here, with instructions of how to
test it:
https://gist.github.com/jeez/
bd3afeff081ba64a695008dd8215866f [2]
Note that we haven't modified the qdisc so it uses a timerqueue because
the modification needed was increasing the number of cachelines of a sk_buff.
This series is also hosted on github and can be found at [3].
The companion iproute2 patches can be found at [4].
[1] https://patchwork.ozlabs.org/cover/882342/
[2] github doesn't make it clear, but the gist can be cloned like this:
$ git clone https://gist.github.com/jeez/
bd3afeff081ba64a695008dd8215866f scheduled-tx-tests
[3] https://github.com/jeez/linux/tree/etf-v2
[4] https://github.com/jeez/iproute2/tree/etf-v2
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:43:00 +0000 (15:43 -0700)]
net/sched: Make etf report drops on error_queue
Use the socket error queue for reporting dropped packets if the
socket has enabled that feature through the SO_TXTIME API.
Packets are dropped either on enqueue() if they aren't accepted by the
qdisc or on dequeue() if the system misses their deadline. Those are
reported as different errors so applications can react accordingly.
Userspace can retrieve the errors through the socket error queue and the
corresponding cmsg interfaces. A struct sock_extended_err* is used for
returning the error data, and the packet's timestamp can be retrieved by
adding both ee_data and ee_info fields as e.g.:
((__u64) serr->ee_data << 32) + serr->ee_info
This feature is disabled by default and must be explicitly enabled by
applications. Enabling it can bring some overhead for the Tx cycles
of the application.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:59 +0000 (15:42 -0700)]
igb: Add support for ETF offload
Implement HW offload support for SO_TXTIME through igb's Launchtime
feature. This is done by extending igb_setup_tc() so it supports
TC_SETUP_QDISC_ETF and configuring i210 so time based transmit
arbitration is enabled.
The FQTSS transmission mode added before is extended so strict
priority (SP) queues wait for stream reservation (SR) ones.
igb_config_tx_modes() is extended so it can support enabling/disabling
Launchtime following the previous approach used for the credit-based
shaper (CBS).
As the previous flow, FQTSS transmission mode is enabled automatically
by the driver once Launchtime (or CBS, as before) is enabled.
Similarly, it's automatically disabled when the feature is disabled
for the last queue that had it setup on.
The driver just consumes the transmit times from the skbuffs directly,
so no special handling is done in case an 'invalid' time is provided.
We assume this has been handled by the ETF qdisc already.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:58 +0000 (15:42 -0700)]
igb: Only call skb_tx_timestamp after descriptors are ready
Currently, skb_tx_timestamp() is being called before the Tx
descriptors are prepared in igb_xmit_frame_ring(), which happens
during either the igb_tso() or igb_tx_csum() calls.
Given that now the skb->tstamp might be used to carry the timestamp
for SO_TXTIME, we must only call skb_tx_timestamp() after the
information has been copied into the Tx descriptors.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:57 +0000 (15:42 -0700)]
igb: Refactor igb_offload_cbs()
Split code into a separate function (igb_offload_apply()) that will be
used by ETF offload implementation.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:56 +0000 (15:42 -0700)]
igb: Only change Tx arbitration when CBS is on
Currently the data transmission arbitration algorithm - DataTranARB
field on TQAVCTRL reg - is always set to CBS when the Tx mode is
changed from legacy to 'Qav' mode.
Make that configuration a bit more granular in preparation for the
upcoming Launchtime enabling patches, since CBS and Launchtime can be
enabled separately. That is achieved by moving the DataTranARB setup
to igb_config_tx_modes() instead.
Similarly, when disabling CBS we must check if it has been disabled
for all queues, and clear the DataTranARB accordingly.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:55 +0000 (15:42 -0700)]
igb: Refactor igb_configure_cbs()
Make this function retrieve what it needs from the Tx ring being
addressed since it already relies on what had been saved on it before.
Also, since this function will be used by the upcoming Launchtime
patches rename it to better reflect its intention. Note that
Launchtime is not part of what 802.1Qav specifies, but the i210
datasheet refers to this set of functionality as "Qav Transmission
Mode".
Here we also perform a tiny refactor at is_any_cbs_enabled(), and add
further documentation to igb_setup_tx_mode().
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:54 +0000 (15:42 -0700)]
net/sched: Add HW offloading capability to ETF
Add infra so etf qdisc supports HW offload of time-based transmission.
For hw offload, the time sorted list is still used, so packets are
dequeued always in order of txtime.
Example:
$ tc qdisc replace dev enp2s0 parent root handle 100 mqprio num_tc 3 \
map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 0
$ tc qdisc add dev enp2s0 parent 100:1 etf offload delta 100000 \
clockid CLOCK_REALTIME
In this example, the Qdisc will use HW offload for the control of the
transmission time through the network adapter. The hrtimer used for
packets scheduling inside the qdisc will use the clockid CLOCK_REALTIME
as reference and packets leave the Qdisc "delta" (100000) nanoseconds
before their transmission time. Because this will be using HW offload and
since dynamic clocks are not supported by the hrtimer, the system clock
and the PHC clock must be synchronized for this mode to behave as
expected.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vinicius Costa Gomes [Tue, 3 Jul 2018 22:42:53 +0000 (15:42 -0700)]
net/sched: Introduce the ETF Qdisc
The ETF (Earliest TxTime First) qdisc uses the information added
earlier in this series (the socket option SO_TXTIME and the new
role of sk_buff->tstamp) to schedule packets transmission based
on absolute time.
For some workloads, just bandwidth enforcement is not enough, and
precise control of the transmission of packets is necessary.
Example:
$ tc qdisc replace dev enp2s0 parent root handle 100 mqprio num_tc 3 \
map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 0
$ tc qdisc add dev enp2s0 parent 100:1 etf delta 100000 \
clockid CLOCK_TAI
In this example, the Qdisc will provide SW best-effort for the control
of the transmission time to the network adapter, the time stamp in the
socket will be in reference to the clockid CLOCK_TAI and packets
will leave the qdisc "delta" (100000) nanoseconds before its transmission
time.
The ETF qdisc will buffer packets sorted by their txtime. It will drop
packets on enqueue() if their skbuff clockid does not match the clock
reference of the Qdisc. Moreover, on dequeue(), a packet will be dropped
if it expires while being enqueued.
The qdisc also supports the SO_TXTIME deadline mode. For this mode, it
will dequeue a packet as soon as possible and change the skb timestamp
to 'now' during etf_dequeue().
Note that both the qdisc's and the SO_TXTIME ABIs allow for a clockid
to be configured, but it's been decided that usage of CLOCK_TAI should
be enforced until we decide to allow for other clockids to be used.
The rationale here is that PTP times are usually in the TAI scale, thus
no other clocks should be necessary. For now, the qdisc will return
EINVAL if any clocks other than CLOCK_TAI are used.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vinicius Costa Gomes [Tue, 3 Jul 2018 22:42:52 +0000 (15:42 -0700)]
net/sched: Allow creating a Qdisc watchdog with other clocks
This adds 'qdisc_watchdog_init_clockid()' that allows a clockid to be
passed, this allows other time references to be used when scheduling
the Qdisc to run.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Richard Cochran [Tue, 3 Jul 2018 22:42:51 +0000 (15:42 -0700)]
net: packet: Hook into time based transmission.
For raw layer-2 packets, copy the desired future transmit time from
the CMSG cookie into the skb.
Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:50 +0000 (15:42 -0700)]
net: ipv6: Hook into time based transmission
Add a struct sockcm_cookie parameter to ip6_setup_cork() so
we can easily re-use the transmit_time field from struct inet_cork
for most paths, by copying the timestamp from the CMSG cookie.
This is later copied into the skb during __ip6_make_skb().
For the raw fast path, also pass the sockcm_cookie as a parameter
so we can just perform the copy at rawv6_send_hdrinc() directly.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:49 +0000 (15:42 -0700)]
net: ipv4: Hook into time based transmission
Add a transmit_time field to struct inet_cork, then copy the
timestamp from the CMSG cookie at ip_setup_cork() so we can
safely copy it into the skb later during __ip_make_skb().
For the raw fast path, just perform the copy at raw_send_hdrinc().
Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Richard Cochran [Tue, 3 Jul 2018 22:42:48 +0000 (15:42 -0700)]
net: Add a new socket option for a future transmit time.
This patch introduces SO_TXTIME. User space enables this option in
order to pass a desired future transmit time in a CMSG when calling
sendmsg(2). The argument to this socket option is a 8-bytes long struct
provided by the uapi header net_tstamp.h defined as:
struct sock_txtime {
clockid_t clockid;
u32 flags;
};
Note that new fields were added to struct sock by filling a 2-bytes
hole found in the struct. For that reason, neither the struct size or
number of cachelines were altered.
Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesus Sanchez-Palencia [Tue, 3 Jul 2018 22:42:47 +0000 (15:42 -0700)]
net: Clear skb->tstamp only on the forwarding path
This is done in preparation for the upcoming time based transmission
patchset. Now that skb->tstamp will be used to hold packet's txtime,
we must ensure that it is being cleared when traversing namespaces.
Also, doing that from skb_scrub_packet() before the early return would
break our feature when tunnels are used.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gustavo A. R. Silva [Tue, 3 Jul 2018 21:17:31 +0000 (16:17 -0500)]
isdn: mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Warning level 2 was used: -Wimplicit-fallthrough=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Marcel Ziswiler [Tue, 3 Jul 2018 15:06:49 +0000 (17:06 +0200)]
net: usb: asix: allow optionally getting mac address from device tree
For Embedded use where e.g. AX88772B chips may be used without external
EEPROMs the boot loader may choose to pass the MAC address to be used
via device tree. Therefore, allow for optionally getting the MAC
address from device tree data e.g. as follows (excerpt from a T30 based
board, local-mac-address to be filled in by boot loader):
/* EHCI instance 1: USB2_DP/N -> AX88772B */
usb@
7d004000 {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
asix@1 {
reg = <1>;
local-mac-address = [00 00 00 00 00 00];
};
};
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Wei Yongjun [Tue, 3 Jul 2018 13:45:12 +0000 (13:45 +0000)]
net: sched: act_pedit: fix possible memory leak in tcf_pedit_init()
'keys_ex' is malloced by tcf_pedit_keys_ex_parse() in tcf_pedit_init()
but not all of the error handle path free it, this may cause memory
leak. This patch fix it.
Fixes:
71d0ed7079df ("net/act_pedit: Support using offset relative to the conventional network headers")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jul 2018 12:40:02 +0000 (21:40 +0900)]
Merge branch 'bridge-iproute2-isolated-port-and-selftests'
Nikolay Aleksandrov says:
====================
bridge: iproute2 isolated port and selftests
Add support to iproute2 for port isolation config and selftests for it.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Nikolay Aleksandrov [Tue, 3 Jul 2018 12:42:44 +0000 (15:42 +0300)]
selftests: forwarding: test for bridge port isolation
This test checks if the bridge port isolation feature works as expected
by performing ping/ping6 tests between hosts that are isolated (should
not work) and between an isolated and non-isolated hosts (should work).
Same test is performed for flooding from and to isolated and
non-isolated ports.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nikolay Aleksandrov [Tue, 3 Jul 2018 12:42:43 +0000 (15:42 +0300)]
selftests: forwarding: lib: extract ping and ping6 so they can be reused
Extract ping and ping6 command execution so the return value can be
checked by the caller, this is needed for port isolation tests that are
intended to fail.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jul 2018 12:30:47 +0000 (21:30 +0900)]
Merge branch 'vhost_net-Avoid-vq-kicks-during-busyloop'
Toshiaki Makita says:
====================
vhost_net: Avoid vq kicks during busyloop
Under heavy load vhost tx busypoll tend not to suppress vq kicks, which
causes poor guest tx performance. The detailed scenario is described in
commitlog of patch 2.
Rx seems not to have that serious problem, but for consistency I made a
similar change on rx to avoid rx wakeups (patch 3).
Additionary patch 4 is to avoid rx kicks under heavy load during
busypoll.
Tx performance is greatly improved by this change. I don't see notable
performance change on rx with this series though.
Performance numbers (tx):
- Bulk transfer from guest to external physical server.
[Guest]->vhost_net->tap--(XDP_REDIRECT)-->i40e --(wire)--> [Server]
- Set 10us busypoll.
- Guest disables checksum and TSO because of host XDP.
- Measured single flow Mbps by netperf, and kicks by perf kvm stat
(EPT_MISCONFIG event).
Before After
Mbps kicks/s Mbps kicks/s
UDP_STREAM 1472byte 247758 27
Send 3645.37 6958.10
Recv 3588.56 6958.10
1byte 9865 37
Send 4.34 5.43
Recv 4.17 5.26
TCP_STREAM 8801.03 45794 9592.77 2884
v2:
- Split patches into 3 parts (renaming variables, tx-kick fix, rx-wakeup
fix).
- Avoid rx-kicks too (patch 4).
- Don't memorize endtime as it is not needed for now.
====================
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Toshiaki Makita [Tue, 3 Jul 2018 07:31:34 +0000 (16:31 +0900)]
vhost_net: Avoid rx vring kicks during busyloop
We may run out of avail rx ring descriptor under heavy load but busypoll
did not detect it so busypoll may have exited prematurely. Avoid this by
checking rx ring full during busypoll.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Toshiaki Makita [Tue, 3 Jul 2018 07:31:33 +0000 (16:31 +0900)]
vhost_net: Avoid rx queue wake-ups during busypoll
We may run handle_rx() while rx work is queued. For example a packet can
push the rx work during the window before handle_rx calls
vhost_net_disable_vq().
In that case busypoll immediately exits due to vhost_has_work()
condition and enables vq again. This can lead to another unnecessary rx
wake-ups, so poll rx work instead of enabling the vq.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Toshiaki Makita [Tue, 3 Jul 2018 07:31:32 +0000 (16:31 +0900)]
vhost_net: Avoid tx vring kicks during busyloop
Under heavy load vhost busypoll may run without suppressing
notification. For example tx zerocopy callback can push tx work while
handle_tx() is running, then busyloop exits due to vhost_has_work()
condition and enables notification but immediately reenters handle_tx()
because the pushed work was tx. In this case handle_tx() tries to
disable notification again, but when using event_idx it by design
cannot. Then busyloop will run without suppressing notification.
Another example is the case where handle_tx() tries to enable
notification but avail idx is advanced so disables it again. This case
also leads to the same situation with event_idx.
The problem is that once we enter this situation busyloop does not work
under heavy load for considerable amount of time, because notification
is likely to happen during busyloop and handle_tx() immediately enables
notification after notification happens. Specifically busyloop detects
notification by vhost_has_work() and then handle_tx() calls
vhost_enable_notify(). Because the detected work was the tx work, it
enters handle_tx(), and enters busyloop without suppression again.
This is likely to be repeated, so with event_idx we are almost not able
to suppress notification in this case.
To fix this, poll the work instead of enabling notification when
busypoll is interrupted by something. IMHO vhost_has_work() is kind of
interruption rather than a signal to completely cancel the busypoll, so
let's run busypoll after the necessary work is done.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Toshiaki Makita [Tue, 3 Jul 2018 07:31:31 +0000 (16:31 +0900)]
vhost_net: Rename local variables in vhost_net_rx_peek_head_len
So we can easily see which variable is for which, tx or rx.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Qiaobin Fu [Sun, 1 Jul 2018 19:16:27 +0000 (15:16 -0400)]
net:sched: add action inheritdsfield to skbedit
The new action inheritdsfield copies the field DS of
IPv4 and IPv6 packets into skb->priority. This enables
later classification of packets based on the DS field.
v5:
*Update the drop counter for TC_ACT_SHOT
v4:
*Not allow setting flags other than the expected ones.
*Allow dumping the pure flags.
v3:
*Use optional flags, so that it won't break old versions of tc.
*Allow users to set both SKBEDIT_F_PRIORITY and SKBEDIT_F_INHERITDSFIELD flags.
v2:
*Fix the style issue
*Move the code from skbmod to skbedit
Original idea by Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Qiaobin Fu <qiaobinf@bu.edu>
Reviewed-by: Michel Machado <michel@digirati.com.br>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jul 2018 05:18:46 +0000 (14:18 +0900)]
Merge branch 'More-mirror-to-gretap-tests-with-bridge-in-UL'
Petr Machata says:
====================
More mirror-to-gretap tests with bridge in UL
This patchset adds two more tests where the mirror-to-gretap has a
bridge in underlay packet path, without a VLAN above or below that
bridge.
In patch #1, a non-VLAN-filtering bridge is tested.
In patch #2, a VLAN-filtering bridge is tested.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Petr Machata [Mon, 2 Jul 2018 17:58:56 +0000 (19:58 +0200)]
selftests: forwarding: Test mirror-to-gretap w/ UL 802.1q
Test for "tc action mirred egress mirror" that mirrors to gretap when
the underlay route points at a VLAN-aware bridge (802.1q).
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Petr Machata [Mon, 2 Jul 2018 17:58:49 +0000 (19:58 +0200)]
selftests: forwarding: Test mirror-to-gretap w/ UL 802.1d
Test for "tc action mirred egress mirror" that mirrors to gretap when
the underlay route points at a VLAN-unaware bridge (802.1d).
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jul 2018 05:06:20 +0000 (14:06 +0900)]
Merge branch 'Handle-multiple-received-packets-at-each-stage'
Edward Cree says:
====================
Handle multiple received packets at each stage
This patch series adds the capability for the network stack to receive a
list of packets and process them as a unit, rather than handling each
packet singly in sequence. This is done by factoring out the existing
datapath code at each layer and wrapping it in list handling code.
The motivation for this change is twofold:
* Instruction cache locality. Currently, running the entire network
stack receive path on a packet involves more code than will fit in the
lowest-level icache, meaning that when the next packet is handled, the
code has to be reloaded from more distant caches. By handling packets
in "row-major order", we ensure that the code at each layer is hot for
most of the list. (There is a corresponding downside in _data_ cache
locality, since we are now touching every packet at every layer, but in
practice there is easily enough room in dcache to hold one cacheline of
each of the 64 packets in a NAPI poll.)
* Reduction of indirect calls. Owing to Spectre mitigations, indirect
function calls are now more expensive than ever; they are also heavily
used in the network stack's architecture (see [1]). By replacing 64
indirect calls to the next-layer per-packet function with a single
indirect call to the next-layer list function, we can save CPU cycles.
Drivers pass an SKB list to the stack at the end of the NAPI poll; this
gives a natural batch size (the NAPI poll weight) and avoids waiting at
the software level for further packets to make a larger batch (which
would add latency). It also means that the batch size is automatically
tuned by the existing interrupt moderation mechanism.
The stack then runs each layer of processing over all the packets in the
list before proceeding to the next layer. Where the 'next layer' (or
the context in which it must run) differs among the packets, the stack
splits the list; this 'late demux' means that packets which differ only
in later headers (e.g. same L2/L3 but different L4) can traverse the
early part of the stack together.
Also, where the next layer is not (yet) list-aware, the stack can revert
to calling the rest of the stack in a loop; this allows gradual/creeping
listification, with no 'flag day' patch needed to listify everything.
Patches 1-2 simply place received packets on a list during the event
processing loop on the sfc EF10 architecture, then call the normal stack
for each packet singly at the end of the NAPI poll. (Analogues of patch
#2 for other NIC drivers should be fairly straightforward.)
Patches 3-9 extend the list processing as far as the IP receive handler.
Patches 1-2 alone give about a 10% improvement in packet rate in the
baseline test; adding patches 3-9 raises this to around 25%.
Performance measurements were made with NetPerf UDP_STREAM, using 1-byte
packets and a single core to handle interrupts on the RX side; this was
in order to measure as simply as possible the packet rate handled by a
single core. Figures are in Mbit/s; divide by 8 to obtain Mpps. The
setup was tuned for maximum reproducibility, rather than raw performance.
Full details and more results (both with and without retpolines) from a
previous version of the patch series are presented in [2].
The baseline test uses four streams, and multiple RXQs all bound to a
single CPU (the netperf binary is bound to a neighbouring CPU). These
tests were run with retpolines.
net-next: 6.91 Mb/s (datum)
after 9: 8.46 Mb/s (+22.5%)
Note however that these results are not robust; changes in the parameters
of the test sometimes shrink the gain to single-digit percentages. For
instance, when using only a single RXQ, only a 4% gain was seen.
One test variation was the use of software filtering/firewall rules.
Adding a single iptables rule (UDP port drop on a port range not matching
the test traffic), thus making the netfilter hook have work to do,
reduced baseline performance but showed a similar gain from the patches:
net-next: 5.02 Mb/s (datum)
after 9: 6.78 Mb/s (+35.1%)
Similarly, testing with a set of TC flower filters (kindly supplied by
Cong Wang) gave the following:
net-next: 6.83 Mb/s (datum)
after 9: 8.86 Mb/s (+29.7%)
These data suggest that the batching approach remains effective in the
presence of software switching rules, and perhaps even improves the
performance of those rules by allowing them and their codepaths to stay
in cache between packets.
Changes from v3:
* Fixed build error when CONFIG_NETFILTER=n (thanks kbuild).
Changes from v2:
* Used standard list handling (and skb->list) instead of the skb-queue
functions (that use skb->next, skb->prev).
- As part of this, changed from a "dequeue, process, enqueue" model to
using list_for_each_safe, list_del, and (new) list_cut_before.
* Altered __netif_receive_skb_core() changes in patch 6 as per Willem de
Bruijn's suggestions (separate **ppt_prev from *pt_prev; renaming).
* Removed patches to Generic XDP, since they were producing no benefit.
I may revisit them later.
* Removed RFC tags.
Changes from v1:
* Rebased across 2 years' net-next movement (surprisingly straightforward).
- Added Generic XDP handling to netif_receive_skb_list_internal()
- Dealt with changes to PFMEMALLOC setting APIs
* General cleanup of code and comments.
* Skipped function calls for empty lists at various points in the stack
(patch #9).
* Added listified Generic XDP handling (patches 10-12), though it doesn't
seem to help (see above).
* Extended testing to cover software firewalls / netfilter etc.
[1] http://vger.kernel.org/netconf2018_files/DavidMiller_netconf2018.pdf
[2] http://vger.kernel.org/netconf2018_files/EdwardCree_netconf2018.pdf
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Mon, 2 Jul 2018 15:14:44 +0000 (16:14 +0100)]
net: don't bother calling list RX functions on empty lists
Generally the check should be very cheap, as the sk_buff_head is in cache.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Mon, 2 Jul 2018 15:14:34 +0000 (16:14 +0100)]
net: ipv4: listify ip_rcv_finish
ip_rcv_finish_core(), if it does not drop, sets skb->dst by either early
demux or route lookup. The last step, calling dst_input(skb), is left to
the caller; in the listified case, we split to form sublists with a common
dst, but then ip_sublist_rcv_finish() just calls dst_input(skb) in a loop.
The next step in listification would thus be to add a list_input() method
to struct dst_entry.
Early demux is an indirect call based on iph->protocol; this is another
opportunity for listification which is not taken here (it would require
slicing up ip_rcv_finish_core() to allow splitting on protocol changes).
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Mon, 2 Jul 2018 15:14:12 +0000 (16:14 +0100)]
net: ipv4: listified version of ip_rcv
Also involved adding a way to run a netfilter hook over a list of packets.
Rather than attempting to make netfilter know about lists (which would be
a major project in itself) we just let it call the regular okfn (in this
case ip_rcv_finish()) for any packets it steals, and have it give us back
a list of packets it's synchronously accepted (which normally NF_HOOK
would automatically call okfn() on, but we want to be able to potentially
pass the list to a listified version of okfn().)
The netfilter hooks themselves are indirect calls that still happen per-
packet (see nf_hook_entry_hookfn()), but again, changing that can be left
for future work.
There is potential for out-of-order receives if the netfilter hook ends up
synchronously stealing packets, as they will be processed before any
accepts earlier in the list. However, it was already possible for an
asynchronous accept to cause out-of-order receives, so presumably this is
considered OK.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Edward Cree [Mon, 2 Jul 2018 15:13:56 +0000 (16:13 +0100)]
net: core: propagate SKB lists through packet_type lookup
__netif_receive_skb_core() does a depressingly large amount of per-packet
work that can't easily be listified, because the another_round looping
makes it nontrivial to slice up into smaller functions.
Fortunately, most of that work disappears in the fast path:
* Hardware devices generally don't have an rx_handler
* Unless you're tcpdumping or something, there is usually only one ptype
* VLAN processing comes before the protocol ptype lookup, so doesn't force
a pt_prev deliver
so normally, __netif_receive_skb_core() will run straight through and pass
back the one ptype found in ptype_base[hash of skb->protocol].
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>