Hayes Wang [Tue, 13 Aug 2019 03:42:08 +0000 (11:42 +0800)]
r8152: support skb_add_rx_frag
Use skb_add_rx_frag() to reduce the memory copy for rx data.
Use a new list of rx_used to store the rx buffer which couldn't be
reused yet.
Besides, the total number of rx buffer may be increased or decreased
dynamically. And it is limited by RTL8152_MAX_RX_AGG.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Hayes Wang [Tue, 13 Aug 2019 03:42:07 +0000 (11:42 +0800)]
r8152: use alloc_pages for rx buffer
Replace kmalloc_node() with alloc_pages() for rx buffer.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Hayes Wang [Tue, 13 Aug 2019 03:42:06 +0000 (11:42 +0800)]
r8152: replace array with linking list for rx information
The original method uses an array to store the rx information. The
new one uses a list to link each rx structure. Then, it is possible
to increase/decrease the number of rx structure dynamically.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Hayes Wang [Tue, 13 Aug 2019 03:42:05 +0000 (11:42 +0800)]
r8152: separate the rx buffer size
The different chips may accept different rx buffer sizes. The RTL8152
supports 16K bytes, and RTL8153 support 32K bytes.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Jakub Kicinski [Wed, 14 Aug 2019 00:16:11 +0000 (17:16 -0700)]
Merge branch 'net-phy-let-phy_speed_down-up-support-speeds-1Gbps'
Heiner says:
====================
So far phy_speed_down/up can be used up to 1Gbps only. Remove this
restriction and add needed helpers to phy-core.c
v2:
- remove unused parameter in patch 1
- rename __phy_speed_down to phy_speed_down_core in patch 2
====================
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Heiner Kallweit [Mon, 12 Aug 2019 21:52:19 +0000 (23:52 +0200)]
net: phy: let phy_speed_down/up support speeds >1Gbps
So far phy_speed_down/up can be used up to 1Gbps only. Remove this
restriction by using new helper __phy_speed_down. New member adv_old
in struct phy_device is used by phy_speed_up to restore the advertised
modes before calling phy_speed_down. Don't simply advertise what is
supported because a user may have intentionally removed modes from
advertisement.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Heiner Kallweit [Mon, 12 Aug 2019 21:51:27 +0000 (23:51 +0200)]
net: phy: add phy_speed_down_core and phy_resolve_min_speed
phy_speed_down_core provides most of the functionality for
phy_speed_down. It makes use of new helper phy_resolve_min_speed that is
based on the sorting of the settings[] array. In certain cases it may be
helpful to be able to exclude legacy half duplex modes, therefore
prepare phy_resolve_min_speed() for it.
v2:
- rename __phy_speed_down to phy_speed_down_core
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Heiner Kallweit [Mon, 12 Aug 2019 21:50:30 +0000 (23:50 +0200)]
net: phy: add __set_linkmode_max_speed
We will need the functionality of __set_linkmode_max_speed also for
linkmode bitmaps other than phydev->supported. Therefore split it.
v2:
- remove unused parameter from __set_linkmode_max_speed
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Vlad Buslov [Mon, 12 Aug 2019 17:02:02 +0000 (20:02 +0300)]
net: devlink: remove redundant rtnl lock assert
It is enough for caller of devlink_compat_switch_id_get() to hold the net
device to guarantee that devlink port is not destroyed concurrently. Remove
rtnl lock assertion and modify comment to warn user that they must hold
either rtnl lock or reference to net device. This is necessary to
accommodate future implementation of rtnl-unlocked TC offloads driver
callbacks.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Jakub Kicinski [Tue, 13 Aug 2019 23:24:57 +0000 (16:24 -0700)]
Merge git://git./linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
The following pull-request contains BPF updates for your *net-next* tree.
There is a small merge conflict in libbpf (Cc Andrii so he's in the loop
as well):
for (i = 1; i <= btf__get_nr_types(btf); i++) {
t = (struct btf_type *)btf__type_by_id(btf, i);
if (!has_datasec && btf_is_var(t)) {
/* replace VAR with INT */
t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0);
<<<<<<< HEAD
/*
* using size = 1 is the safest choice, 4 will be too
* big and cause kernel BTF validation failure if
* original variable took less than 4 bytes
*/
t->size = 1;
*(int *)(t+1) = BTF_INT_ENC(0, 0, 8);
} else if (!has_datasec && kind == BTF_KIND_DATASEC) {
=======
t->size = sizeof(int);
*(int *)(t + 1) = BTF_INT_ENC(0, 0, 32);
} else if (!has_datasec && btf_is_datasec(t)) {
>>>>>>>
72ef80b5ee131e96172f19e74b4f98fa3404efe8
/* replace DATASEC with STRUCT */
Conflict is between the two commits
1d4126c4e119 ("libbpf: sanitize VAR to
conservative 1-byte INT") and
b03bc6853c0e ("libbpf: convert libbpf code to
use new btf helpers"), so we need to pick the sanitation fixup as well as
use the new btf_is_datasec() helper and the whitespace cleanup. Looks like
the following:
[...]
if (!has_datasec && btf_is_var(t)) {
/* replace VAR with INT */
t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0);
/*
* using size = 1 is the safest choice, 4 will be too
* big and cause kernel BTF validation failure if
* original variable took less than 4 bytes
*/
t->size = 1;
*(int *)(t + 1) = BTF_INT_ENC(0, 0, 8);
} else if (!has_datasec && btf_is_datasec(t)) {
/* replace DATASEC with STRUCT */
[...]
The main changes are:
1) Addition of core parts of compile once - run everywhere (co-re) effort,
that is, relocation of fields offsets in libbpf as well as exposure of
kernel's own BTF via sysfs and loading through libbpf, from Andrii.
More info on co-re: http://vger.kernel.org/bpfconf2019.html#session-2
and http://vger.kernel.org/lpc-bpf2018.html#session-2
2) Enable passing input flags to the BPF flow dissector to customize parsing
and allowing it to stop early similar to the C based one, from Stanislav.
3) Add a BPF helper function that allows generating SYN cookies from XDP and
tc BPF, from Petar.
4) Add devmap hash-based map type for more flexibility in device lookup for
redirects, from Toke.
5) Improvements to XDP forwarding sample code now utilizing recently enabled
devmap lookups, from Jesper.
6) Add support for reporting the effective cgroup progs in bpftool, from Jakub
and Takshak.
7) Fix reading kernel config from bpftool via /proc/config.gz, from Peter.
8) Fix AF_XDP umem pages mapping for 32 bit architectures, from Ivan.
9) Follow-up to add two more BPF loop tests for the selftest suite, from Alexei.
10) Add perf event output helper also for other skb-based program types, from Allan.
11) Fix a co-re related compilation error in selftests, from Yonghong.
====================
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
YueHaibing [Mon, 12 Aug 2019 14:41:56 +0000 (22:41 +0800)]
net: hns3: Make hclge_func_reset_sync_vf static
Fix sparse warning:
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c:3190:5:
warning: symbol 'hclge_func_reset_sync_vf' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Jiri Pirko [Mon, 12 Aug 2019 12:28:31 +0000 (14:28 +0200)]
devlink: send notifications for deleted snapshots on region destroy
Currently the notifications for deleted snapshots are sent only in case
user deletes a snapshot manually. Send the notifications in case region
is destroyed too.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Daniel Borkmann [Tue, 13 Aug 2019 21:19:42 +0000 (23:19 +0200)]
Merge branch 'bpf-libbpf-read-sysfs-btf'
Andrii Nakryiko says:
====================
Now that kernel's BTF is exposed through sysfs at well-known location, attempt
to load it first as a target BTF for the purpose of BPF CO-RE relocations.
Patch #1 is a follow-up patch to rename /sys/kernel/btf/kernel into
/sys/kernel/btf/vmlinux.
Patch #2 adds ability to load raw BTF contents from sysfs and expands the list
of locations libbpf attempts to load vmlinux BTF from.
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Andrii Nakryiko [Tue, 13 Aug 2019 18:54:43 +0000 (11:54 -0700)]
libbpf: attempt to load kernel BTF from sysfs first
Add support for loading kernel BTF from sysfs (/sys/kernel/btf/vmlinux)
as a target BTF. Also extend the list of on disk search paths for
vmlinux ELF image with entries that perf is searching for.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Andrii Nakryiko [Tue, 13 Aug 2019 18:54:42 +0000 (11:54 -0700)]
btf: rename /sys/kernel/btf/kernel into /sys/kernel/btf/vmlinux
Expose kernel's BTF under the name vmlinux to be more uniform with using
kernel module names as file names in the future.
Fixes: 341dfcf8d78e ("btf: expose BTF info through sysfs")
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Petar Penkov [Mon, 12 Aug 2019 23:30:39 +0000 (16:30 -0700)]
selftests/bpf: fix race in flow dissector tests
Since the "last_dissection" map holds only the flow keys for the most
recent packet, there is a small race in the skb-less flow dissector
tests if a new packet comes between transmitting the test packet, and
reading its keys from the map. If this happens, the test packet keys
will be overwritten and the test will fail.
Changing the "last_dissection" map to a hash map, keyed on the
source/dest port pair resolves this issue. Additionally, let's clear the
last test results from the map between tests to prevent previous test
cases from interfering with the following test cases.
Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode")
Signed-off-by: Petar Penkov <ppenkov@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Peter Wu [Tue, 13 Aug 2019 00:38:33 +0000 (01:38 +0100)]
tools: bpftool: add feature check for zlib
bpftool requires libelf, and zlib for decompressing /proc/config.gz.
zlib is a transitive dependency via libelf, and became mandatory since
elfutils 0.165 (Jan 2016). The feature check of libelf is already done
in the elfdep target of tools/lib/bpf/Makefile, pulled in by bpftool via
a dependency on libbpf.a. Add a similar feature check for zlib.
Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Andrii Nakryiko [Mon, 12 Aug 2019 18:39:47 +0000 (11:39 -0700)]
btf: expose BTF info through sysfs
Make .BTF section allocated and expose its contents through sysfs.
/sys/kernel/btf directory is created to contain all the BTFs present
inside kernel. Currently there is only kernel's main BTF, represented as
/sys/kernel/btf/kernel file. Once kernel modules' BTFs are supported,
each module will expose its BTF as /sys/kernel/btf/<module-name> file.
Current approach relies on a few pieces coming together:
1. pahole is used to take almost final vmlinux image (modulo .BTF and
kallsyms) and generate .BTF section by converting DWARF info into
BTF. This section is not allocated and not mapped to any segment,
though, so is not yet accessible from inside kernel at runtime.
2. objcopy dumps .BTF contents into binary file and subsequently
convert binary file into linkable object file with automatically
generated symbols _binary__btf_kernel_bin_start and
_binary__btf_kernel_bin_end, pointing to start and end, respectively,
of BTF raw data.
3. final vmlinux image is generated by linking this object file (and
kallsyms, if necessary). sysfs_btf.c then creates
/sys/kernel/btf/kernel file and exposes embedded BTF contents through
it. This allows, e.g., libbpf and bpftool access BTF info at
well-known location, without resorting to searching for vmlinux image
on disk (location of which is not standardized and vmlinux image
might not be even available in some scenarios, e.g., inside qemu
during testing).
Alternative approach using .incbin assembler directive to embed BTF
contents directly was attempted but didn't work, because sysfs_proc.o is
not re-compiled during link-vmlinux.sh stage. This is required, though,
to update embedded BTF data (initially empty data is embedded, then
pahole generates BTF info and we need to regenerate sysfs_btf.o with
updated contents, but it's too late at that point).
If BTF couldn't be generated due to missing or too old pahole,
sysfs_btf.c handles that gracefully by detecting that
_binary__btf_kernel_bin_start (weak symbol) is 0 and not creating
/sys/kernel/btf at all.
v2->v3:
- added Documentation/ABI/testing/sysfs-kernel-btf (Greg K-H);
- created proper kobject (btf_kobj) for btf directory (Greg K-H);
- undo v2 change of reusing vmlinux, as it causes extra kallsyms pass
due to initially missing __binary__btf_kernel_bin_{start/end} symbols;
v1->v2:
- allow kallsyms stage to re-use vmlinux generated by gen_btf();
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Peter Wu [Fri, 9 Aug 2019 00:39:11 +0000 (01:39 +0100)]
tools: bpftool: fix reading from /proc/config.gz
/proc/config has never existed as far as I can see, but /proc/config.gz
is present on Arch Linux. Add support for decompressing config.gz using
zlib which is a mandatory dependency of libelf anyway. Replace existing
stdio functions with gzFile operations since the latter transparently
handles uncompressed and gzip-compressed files.
Cc: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:42:43 +0000 (12:42 +0200)]
caif: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Richard Fontana <rfontana@redhat.com>
Cc: Steve Winslow <swinslow@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:31:08 +0000 (12:31 +0200)]
xen-netback: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Paul Durrant <paul.durrant@citrix.com>
Cc: xen-devel@lists.xenproject.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 12 Aug 2019 04:27:15 +0000 (21:27 -0700)]
Merge branch 'net-dsa-mv88e6xxx-prepare-Wait-Bit-operation'
Vivien Didelot says:
====================
net: dsa: mv88e6xxx: prepare Wait Bit operation
The Remote Management Interface has its own implementation of a Wait
Bit operation, which requires a bit number and a value to wait for.
In order to prepare the introduction of this implementation, rework the
code waiting for bits and masks in mv88e6xxx to match this signature.
This has the benefit to unify the implementation of wait routines while
removing obsolete wait and update functions and also reducing the code.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:59 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: add delay in direct SMI wait
The mv88e6xxx_smi_direct_wait routine is used to wait on indirect
registers access. It is of no exception and must delay between read
attempts, like other wait routines.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:58 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: fix SMI bit checking
The current mv88e6xxx_smi_direct_wait function is only used to check
the 16th bit of the (16-bit) SMI Command register. But the bit shift
operation is not enough if we eventually use this function to check
other bits, thus replace it with a mask.
Fixes: e7ba0fad9c53 ("net: dsa: mv88e6xxx: refine SMI support")
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:57 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: remove wait and update routines
Now that we have proper Wait Bit and Wait Mask routines, remove the
unused mv88e6xxx_wait routine and its Global 1 and Global 2 variants.
The indirect tables such as the Device Mapping Table or Priority
Override Table make use of an Update bit to distinguish reading (0)
from writing (1) operations. After a write operation occurs, the bit
self clears right away so there's no need to wait on it. Thus keep
things simple and remove the mv88e6xxx_update helper as well.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:56 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: wait for AVB Busy bit
The AVB is not an indirect table using an Update bit, but a unit using
a Busy bit. This means that we must ensure that this bit is cleared
before setting it and wait until it gets cleared again after writing
an operation. Reflect that.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:55 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: introduce wait bit routine
Many portions of the driver need to wait until a given bit is set
or cleared. Some busses even have a specific implementation for this
operation. In preparation for such variant, implement a generic Wait
Bit routine that can be used by the driver core functions.
This allows us to get rid of the custom implementations we may find
in the driver. Note that for the EEPROM bits, BUSY and RUNNING bits
are independent, thus it is more efficient to wait independently for
each bit instead of waiting for their mask.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:54 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: introduce wait mask routine
The current mv88e6xxx_wait routine is used to wait for a given mask
to be cleared to zero. However in some cases, the driver may have
to wait for a given mask to be of a certain non-zero value.
Thus provide a generic wait mask routine that will be used to implement
the current mv88e6xxx_wait function, and use it to wait for
88E6185
PPU states.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Fri, 9 Aug 2019 22:47:53 +0000 (18:47 -0400)]
net: dsa: mv88e6xxx: wait for
88E6185 PPU disabled
The PPU state of
88E6185 can be either "Disabled at Reset" or
"Disabled after Initialization". Because we intentionally clear the
PPU Enabled bit before checking its state, it is safe to wait for the
MV88E6185_G1_STS_PPU_STATE_DISABLED state explicitly instead of waiting
for any state different than MV88E6185_G1_STS_PPU_STATE_POLLING.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 9 Aug 2019 20:59:07 +0000 (22:59 +0200)]
r8169: inline rtl8169_free_rx_databuff
rtl8169_free_rx_databuff is used in only one place, so let's inline it.
We can improve the loop because rtl8169_init_ring zero's RX_databuff
before calling rtl8169_rx_fill, and rtl8169_rx_fill fills
Rx_databuff starting from index 0.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 12 Aug 2019 04:24:32 +0000 (21:24 -0700)]
Merge branch 'realtek-phy-next'
Heiner Kallweit says:
====================
net: phy: realtek: add support for integrated 2.5Gbps PHY in RTL8125
This series adds support for the integrated 2.5Gbps PHY in RTL8125.
First three patches add necessary functionality to phylib.
Changes in v2:
- added patch 1
- changed patch 4 to use a fake PHY ID that is injected by the
network driver. This allows to use a dedicated PHY driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 9 Aug 2019 18:45:14 +0000 (20:45 +0200)]
net: phy: realtek: add support for the 2.5Gbps PHY in RTL8125
This adds support for the integrated 2.5Gbps PHY in Realtek RTL8125.
Advertisement of 2.5Gbps mode is done via a vendor-specific register.
Same applies to reading NBase-T link partner advertisement.
Unfortunately this 2.5Gbps PHY shares the PHY ID with the integrated
1Gbps PHY's in other Realtek network chips and so far no method is
known to differentiate them. As a workaround use a dedicated fake PHY ID
that is set by the network driver by intercepting the MDIO PHY ID read.
v2:
- Create dedicated PHY driver and use a fake PHY ID that is injected by
the network driver. Suggested by Andrew Lunn.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 9 Aug 2019 18:44:22 +0000 (20:44 +0200)]
net: phy: add phy_modify_paged_changed
Add helper function phy_modify_paged_changed, behavios is the same
as for phy_modify_changed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 9 Aug 2019 18:43:50 +0000 (20:43 +0200)]
net: phy: prepare phylib to deal with PHY's extending Clause 22
The integrated PHY in 2.5Gbps chip RTL8125 is the first (known to me)
PHY that uses standard Clause 22 for all modes up to 1Gbps and adds
2.5Gbps control using vendor-specific registers. To use phylib for
the standard part little extensions are needed:
- Move most of genphy_config_aneg to a new function
__genphy_config_aneg that takes a parameter whether restarting
auto-negotiation is needed (depending on whether content of
vendor-specific advertisement register changed).
- Don't clear phydev->lp_advertising in genphy_read_status so that
we can set non-C22 mode flags before.
Basically both changes mimic the behavior of the equivalent Clause 45
functions.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 9 Aug 2019 18:43:04 +0000 (20:43 +0200)]
net: phy: simplify genphy_config_advert by using the linkmode_adv_to_xxx_t functions
Using linkmode_adv_to_mii_adv_t and linkmode_adv_to_mii_ctrl1000_t
allows to simplify the code. In addition avoiding the conversion to
the legacy u32 advertisement format allows to remove the warning.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Fri, 9 Aug 2019 11:05:12 +0000 (13:05 +0200)]
netdevsim: register couple of devlink params
Register couple of devlink params, one generic, one driver-specific.
Make the values available over debugfs.
Example:
$ echo "111" > /sys/bus/netdevsim/new_device
$ devlink dev param
netdevsim/netdevsim111:
name max_macs type generic
values:
cmode driverinit value 32
name test1 type driver-specific
values:
cmode driverinit value true
$ cat /sys/kernel/debug/netdevsim/netdevsim111/max_macs
32
$ cat /sys/kernel/debug/netdevsim/netdevsim111/test1
Y
$ devlink dev param set netdevsim/netdevsim111 name max_macs cmode driverinit value 16
$ devlink dev param set netdevsim/netdevsim111 name test1 cmode driverinit value false
$ devlink dev reload netdevsim/netdevsim111
$ cat /sys/kernel/debug/netdevsim/netdevsim111/max_macs
16
$ cat /sys/kernel/debug/netdevsim/netdevsim111/test1
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 11 Aug 2019 17:53:31 +0000 (10:53 -0700)]
Merge branch 'drop_monitor-Capture-dropped-packets-and-metadata'
Ido Schimmel says:
====================
drop_monitor: Capture dropped packets and metadata
So far drop monitor supported only one mode of operation in which a
summary of recent packet drops is periodically sent to user space as a
netlink event. The event only includes the drop location (program
counter) and number of drops in the last interval.
While this mode of operation allows one to understand if the system is
dropping packets, it is not sufficient if a more detailed analysis is
required. Both the packet itself and related metadata are missing.
This patchset extends drop monitor with another mode of operation where
the packet - potentially truncated - and metadata (e.g., drop location,
timestamp, netdev) are sent to user space as a netlink event. Thanks to
the extensible nature of netlink, more metadata can be added in the
future.
To avoid performing expensive operations in the context in which
kfree_skb() is called, the dropped skbs are cloned and queued on per-CPU
skb drop list. The list is then processed in process context (using a
workqueue), where the netlink messages are allocated, prepared and
finally sent to user space.
A follow-up patchset will integrate drop monitor with devlink and allow
the latter to call into drop monitor to report hardware drops. In the
future, XDP drops can be added as well, thereby making drop monitor the
go-to netlink channel for diagnosing all packet drops.
Example usage with patched dropwatch [1] can be found here [2]. Example
dissection of drop monitor netlink events with patched wireshark [3] can
be found here [4]. I will submit both changes upstream after the kernel
changes are accepted. Another change worth making is adding a dropmon
pseudo interface to libpcap, similar to the nflog interface [5]. This
will allow users to specifically listen on dropmon traffic instead of
capturing all netlink packets via the nlmon netdev.
Patches #1-#5 prepare the code towards the actual changes in later
patches.
Patch #6 adds another mode of operation to drop monitor in which the
dropped packet itself is notified to user space along with metadata.
Patch #7 allows users to truncate reported packets to a specific length,
in case only the headers are of interest. The original length of the
packet is added as metadata to the netlink notification.
Patch #8 allows user to query the current configuration of drop monitor
(e.g., alert mode, truncation length).
Patches #9-#10 allow users to tune the length of the per-CPU skb drop
list according to their needs.
Changes since v1 [6]:
* Add skb protocol as metadata. This allows user space to correctly
dissect the packet instead of blindly assuming it is an Ethernet
packet
Changes since RFC [7]:
* Limit the length of the per-CPU skb drop list and make it configurable
* Do not use the hysteresis timer in packet alert mode
* Introduce alert mode operations in a separate patch and only then
introduce the new alert mode
* Use 'skb->skb_iif' instead of 'skb->dev' because the latter is inside
a union with 'dev_scratch' and therefore not guaranteed to point to a
valid netdev
* Return '-EBUSY' instead of '-EOPNOTSUPP' when trying to configure drop
monitor while it is monitoring
* Did not change schedule_work() in favor of schedule_work_on() as I did
not observe a change in number of tail drops
[1] https://github.com/idosch/dropwatch/tree/packet-mode
[2] https://gist.github.com/idosch/
3d524b887e16bc11b4b19e25c23dcc23#file-gistfile1-txt
[3] https://github.com/idosch/wireshark/tree/drop-monitor-v2
[4] https://gist.github.com/idosch/
3d524b887e16bc11b4b19e25c23dcc23#file-gistfile2-txt
[5] https://github.com/the-tcpdump-group/libpcap/blob/master/pcap-netfilter-linux.c
[6] https://patchwork.ozlabs.org/cover/
1143443/
[7] https://patchwork.ozlabs.org/cover/
1135226/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:55 +0000 (10:35 +0300)]
drop_monitor: Expose tail drop counter
Previous patch made the length of the per-CPU skb drop list
configurable. Expose a counter that shows how many packets could not be
enqueued to this list.
This allows users determine the desired queue length.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:54 +0000 (10:35 +0300)]
drop_monitor: Make drop queue length configurable
In packet alert mode, each CPU holds a list of dropped skbs that need to
be processed in process context and sent to user space. To avoid
exhausting the system's memory the maximum length of this queue is
currently set to 1000.
Allow users to tune the length of this queue according to their needs.
The configured length is reported to user space when drop monitor
configuration is queried.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:53 +0000 (10:35 +0300)]
drop_monitor: Add a command to query current configuration
Users should be able to query the current configuration of drop monitor
before they start using it. Add a command to query the existing
configuration which currently consists of alert mode and packet
truncation length.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:52 +0000 (10:35 +0300)]
drop_monitor: Allow truncation of dropped packets
When sending dropped packets to user space it is not always necessary to
copy the entire packet as usually only the headers are of interest.
Allow user to specify the truncation length and add the original length
of the packet as additional metadata to the netlink message.
By default no truncation is performed.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:51 +0000 (10:35 +0300)]
drop_monitor: Add packet alert mode
So far drop monitor supported only one alert mode in which a summary of
locations in which packets were recently dropped was sent to user space.
This alert mode is sufficient in order to understand that packets were
dropped, but lacks information to perform a more detailed analysis.
Add a new alert mode in which the dropped packet itself is passed to
user space along with metadata: The drop location (as program counter
and resolved symbol), ingress netdevice and drop timestamp. More
metadata can be added in the future.
To avoid performing expensive operations in the context in which
kfree_skb() is invoked (can be hard IRQ), the dropped skb is cloned and
queued on per-CPU skb drop list. Then, in process context the netlink
message is allocated, prepared and finally sent to user space.
The per-CPU skb drop list is limited to 1000 skbs to prevent exhausting
the system's memory. Subsequent patches will make this limit
configurable and also add a counter that indicates how many skbs were
tail dropped.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:50 +0000 (10:35 +0300)]
drop_monitor: Add alert mode operations
The next patch is going to add another alert mode in which the dropped
packet is notified to user space, instead of only a summary of recent
drops.
Abstract the differences between the modes by adding alert mode
operations. The operations are selected based on the currently
configured mode and associated with the probes and the work item just
before tracing starts.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:49 +0000 (10:35 +0300)]
drop_monitor: Require CAP_NET_ADMIN for drop monitor configuration
Currently, the configure command does not do anything but return an
error. Subsequent patches will enable the command to change various
configuration options such as alert mode and packet truncation.
Similar to other netlink-based configuration channels, make sure only
users with the CAP_NET_ADMIN capability set can execute this command.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:48 +0000 (10:35 +0300)]
drop_monitor: Reset per-CPU data before starting to trace
The function reset_per_cpu_data() allocates and prepares a new skb for
the summary netlink alert message ('NET_DM_CMD_ALERT'). The new skb is
stored in the per-CPU 'data' variable and the old is returned.
The function is invoked during module initialization and from the
workqueue, before an alert is sent. This means that it is possible to
receive an alert with stale data, if we stopped tracing when the
hysteresis timer ('data->send_timer') was pending.
Instead of invoking the function during module initialization, invoke it
just before we start tracing and ensure we get a fresh skb.
This also allows us to remove the calls to initialize the timer and the
work item from the module initialization path, since both could have
been triggered by the error paths of reset_per_cpu_data().
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:47 +0000 (10:35 +0300)]
drop_monitor: Initialize timer and work item upon tracing enable
The timer and work item are currently initialized once during module
init, but subsequent patches will need to associate different functions
with the work item, based on the configured alert mode.
Allow subsequent patches to make that change by initializing and
de-initializing these objects during tracing enable and disable.
This also guarantees that once the request to disable tracing returns,
no more netlink notifications will be generated.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Sun, 11 Aug 2019 07:35:46 +0000 (10:35 +0300)]
drop_monitor: Split tracing enable / disable to different functions
Subsequent patches will need to enable / disable tracing based on the
configured alerting mode.
Reduce the nesting level and prepare for the introduction of this
functionality by splitting the tracing enable / disable operations into
two different functions.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 10 Aug 2019 22:25:49 +0000 (15:25 -0700)]
Merge branch 'Networking-driver-debugfs-cleanups'
Greg Kroah-Hartman says:
====================
Networking driver debugfs cleanups
There is no need to test the result of any debugfs call anymore. The
debugfs core warns the user if something fails, and the return value of
a debugfs call can always be fed back into another debugfs call with no
problems.
Also, debugfs is for debugging, so if there are problems with debugfs
(i.e. the system is out of memory) the rest of the kernel should not
change behavior, so testing for debugfs calls is pointless and not the
goal of debugfs at all.
This series cleans up a lot of networking drivers and some wimax code
that was calling debugfs and trying to do something with the return
value that it didn't need to. Removing this logic makes the code
smaller, easier to understand, and use less run-time memory in some
cases, all good things.
The series is against net-next, and have no dependancies between any of
them if they want to go through any random tree/order. Or, if wanted,
I can take them through my driver-core tree where other debugfs cleanups
are being slowly fed during major merge windows.
v3: fix build warning in i2400m, I thought I had caught them all :(
add acks from some reviewers
v2: fix up build warnings, it's as if I never even built these. Ugh, so
sorry for wasting people's time with the v1 series. I need to stop
relying on 0-day as it isn't working well anymore :(
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:32 +0000 (12:17 +0200)]
ieee802154: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Alexander Aring <alex.aring@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Harry Morris <h.morris@cascoda.com>
Cc: linux-wpan@vger.kernel.org
Cc: netdev@vger.kernel.org
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:31 +0000 (12:17 +0200)]
ixgbe: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:30 +0000 (12:17 +0200)]
i40e: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:29 +0000 (12:17 +0200)]
fm10k: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:28 +0000 (12:17 +0200)]
mvpp2: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Chevallier <maxime.chevallier@bootlin.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Huckleberry <nhuck@google.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:27 +0000 (12:17 +0200)]
skge: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Mirko Lindner <mlindner@marvell.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:26 +0000 (12:17 +0200)]
qca: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Michael Heimpold <michael.heimpold@i2se.com>
Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:25 +0000 (12:17 +0200)]
dpaa2: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Because we don't care about the individual files, we can remove the
stored dentry for the files, as they are not needed to be kept track of
at all.
Cc: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:24 +0000 (12:17 +0200)]
stmmac: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Because we don't care about the individual files, we can remove the
stored dentry for the files, as they are not needed to be kept track of
at all.
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:23 +0000 (12:17 +0200)]
nfp: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Edwin Peer <edwin.peer@netronome.com>
Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: Simon Horman <simon.horman@netronome.com>
Cc: oss-drivers@netronome.com
Cc: netdev@vger.kernel.org
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:22 +0000 (12:17 +0200)]
hns3: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:21 +0000 (12:17 +0200)]
cxgb4: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
If a debugfs call fails, it will properly warn in the syslog, there's no
need for all individual drivers to also print a message, so that is one
more reason to not care about checking the return values.
Cc: Vishal Kulkarni <vishal@chelsio.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Casey Leedom <leedom@chelsio.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:20 +0000 (12:17 +0200)]
bnxt: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
This cleans up a lot of unneeded code and logic around the debugfs
files, making all of this much simpler and easier to understand.
Cc: Michael Chan <michael.chan@broadcom.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:19 +0000 (12:17 +0200)]
xgbe: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
This cleans up a lot of unneeded code and logic around the debugfs
files, making all of this much simpler and easier to understand.
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:18 +0000 (12:17 +0200)]
mlx5: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
This cleans up a lot of unneeded code and logic around the debugfs
files, making all of this much simpler and easier to understand as we
don't need to keep the dentries saved anymore.
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:17 +0000 (12:17 +0200)]
bonding: no need to print a message if debugfs_create_dir() fails
The debugfs core now will print a message if this function fails, so
don't duplicate that logic. Also, no need to change the code logic if
the call fails either, as no debugfs calls should interrupt normal
kernel code for any reason.
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Sat, 10 Aug 2019 10:17:16 +0000 (12:17 +0200)]
wimax: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
This cleans up a lot of unneeded code and logic around the debugfs wimax
files, making all of this much simpler and easier to understand.
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: linux-wimax@intel.com
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 10 Aug 2019 03:11:19 +0000 (20:11 -0700)]
Merge tag 'mlx5-updates-2019-08-09' of git://git./linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2019-08-09
This series includes update to mlx5 ethernet and core driver:
In first #11 patches, Vlad submits part 2 of 3 part series to allow
TC flow handling for concurrent execution.
1) TC flow handling for concurrent execution (part 2)
Vald Says:
==========
Refactor data structures that are shared between flows in tc.
Currently, all cls API hardware offloads driver callbacks require caller
to hold rtnl lock when calling them. Cls API has already been updated to
update software filters in parallel (on classifiers that support
unlocked execution), however hardware offloads code still obtains rtnl
lock before calling driver tc callbacks. This set implements support for
unlocked execution of tc hairpin, mod_hdr and encap subsystem. The
changed implemented in these subsystems are very similar in general.
The main difference is that hairpin is accessed through mlx5e_tc_table
(legacy mode), mod_hdr is accessed through both mlx5e_tc_table and
mlx5_esw_offload (legacy and switchdev modes) and encap is only accessed
through mlx5_esw_offload (switchdev mode).
1.1) Hairpin handling and structure mlx5e_hairpin_entry refactored in
following way:
- Hairpin structure is extended with atomic reference counter. This
approach allows to lookup of hairpin entry and obtain reference to it
with hairpin_tbl_lock protection and then continue using the entry
unlocked (including provisioning to hardware).
- To support unlocked provisioning of hairpin entry to hardware, the entry
is extended with 'res_ready' completion and is inserted to hairpin_tbl
before calling the firmware. With this approach any concurrent users that
attempt to use the same hairpin entry wait for completion first to
prevent access to entries that are not fully initialized.
- Hairpin entry is extended with new flows_lock spinlock to protect the
list when multiple concurrent tc instances update flows attached to
the same hairpin entry.
1.2) Modify header handling code and structure mlx5e_mod_hdr_entry
are refactored in the following way:
- Mod_hdr structure is extended with atomic reference counter. This
approach allows to lookup of mod_hdr entry and obtain reference to it
with mod_hdr_tbl_lock protection and then continue using the entry
unlocked (including provisioning to hardware).
- To support unlocked provisioning of mod_hdr entry to hardware, the entry
is extended with 'res_ready' completion and is inserted to mod_hdr_tbl
before calling the firmware. With this approach any concurrent users that
attempt to use the same mod_hdr entry wait for completion first to
prevent access to entries that are not fully initialized.
- Mod_Hdr entry is extended with new flows_lock spinlock to protect the
list when multiple concurrent tc instances update flows attached to
the same mod_hdr entry.
1.3) Encapsulation handling code and Structure mlx5e_encap_entry
are refactored in the following way:
- encap structure is extended with atomic reference counter. This
approach allows to lookup of encap entry and obtain reference to it
with encap_tbl_lock protection and then continue using the entry
unlocked (including provisioning to hardware).
- To support unlocked provisioning of encap entry to hardware, the entry is
extended with 'res_ready' completion and is inserted to encap_tbl before
calling the firmware. With this approach any concurrent users that
attempt to use the same encap entry wait for completion first to prevent
access to entries that are not fully initialized.
- As a difference from approach used to refactor hairpin and mod_hdr,
encap entry is not extended with any per-entry fine-grained lock.
Instead, encap_table_lock is used to synchronize all operations on
encap table and instances of mlx5e_encap_entry. This is necessary
because single flow can be attached to multiple encap entries
simultaneously. During new flow creation or neigh update event all of
encaps that flow is attached to must be accessed together as in atomic
manner, which makes usage of per-entry lock infeasible.
- Encap entry is extended with new flows_lock spinlock to protect the
list when multiple concurrent tc instances update flows attached to
the same encap entry.
==========
3) Parav improves the way port representors report their parent ID and
port index.
4) Use refcount_t for refcount in vxlan data base from Chuhong Yuan
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Roman Mashak [Fri, 9 Aug 2019 22:46:40 +0000 (18:46 -0400)]
tc-testing: added tdc tests for matchall filter
Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Fri, 9 Aug 2019 23:13:38 +0000 (16:13 -0700)]
selftests: Fix detection of nettest command in fcnal-test
Most of the tests run by fcnal-test.sh relies on the nettest command.
Rather than trying to cover all of the individual tests, check for the
binary only at the beginning.
Also removes the need for log_error which is undefined.
Fixes: 6f9d5cacfe07 ("selftests: Setup for functional tests for fib and socket lookups")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Chuhong Yuan [Fri, 2 Aug 2019 16:48:28 +0000 (00:48 +0800)]
net/mlx5e: Use refcount_t for refcount
refcount_t is better for reference counters since its
implementation can prevent overflows.
So convert atomic_t ref counters to refcount_t.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Parav Pandit [Sun, 21 Jul 2019 03:20:58 +0000 (22:20 -0500)]
net/mlx5e: Use vhca_id in generating representor port_index
It is desired to use unique port indices when multiple pci devices'
devlink instance have the same switch-id.
Make use of vhca-id to generate such unique devlink port indices.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Parav Pandit [Fri, 26 Jul 2019 18:42:04 +0000 (13:42 -0500)]
net/mlx5e: Simplify querying port representor parent id
System image GUID doesn't depend on eswitch switchdev mode.
Hence, remove the check which simplifies the code.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Parav Pandit [Fri, 26 Jul 2019 13:26:52 +0000 (08:26 -0500)]
net/mlx5: E-switch, Removed unused hwid
Currently mlx5_eswitch_rep stores same hw ID for all representors.
However it is never used from this structure.
It is always used from mlx5_vport.
Hence, remove unused field.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Thu, 8 Aug 2019 14:01:33 +0000 (17:01 +0300)]
net/mlx5e: Allow concurrent creation of encap entries
Encap entries creation is fully synchronized by encap_tbl_lock. In order to
allow concurrent allocation of hardware resources used to offload
encapsulation, extend mlx5e_encap_entry with 'res_ready' completion. Move
call to mlx5e_tc_tun_create_header_ipv{4|6}() out of encap_tbl_lock
critical section. Modify code that attaches new flows to existing encap to
wait for 'res_ready' completion before using the entry. Insert encap entry
to table before provisioning it to hardware and modify all users of the
encap table to verify that encap was fully initialized by checking
completion result for non-zero value (and to wait for 'res_ready'
completion, if necessary).
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Fri, 2 Aug 2019 19:21:56 +0000 (22:21 +0300)]
net/mlx5e: Protect encap hash table with mutex
To remove dependency on rtnl lock, protect encap hash table from concurrent
modifications with new "encap_tbl_lock" mutex. Use the mutex to protect
internal encap entry state from concurrent modification. This is necessary
because a flow can be attached to multiple encap entries simultaneously,
which significantly complicates using finer grained per-entry lock.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Sun, 3 Jun 2018 17:31:47 +0000 (20:31 +0300)]
net/mlx5e: Extend encap entry with reference counter
List of flows attached to encap entry is used as implicit reference
counter (encap entry is deallocated when list becomes free) and as a
mechanism to obtain encap entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to encap entry is possible. Proper atomic reference counter is
required to support concurrent access.
As a preparation for extending encap with reference counting, extract code
that lookups and deletes encap entry into standalone put/get helpers. In
order to remove this dependency on external locking, extend encap entry
with reference counter to manage its lifetime and extend flow structure
with direct pointer to encap entry that flow is attached to.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Thu, 8 Aug 2019 13:53:15 +0000 (16:53 +0300)]
net/mlx5e: Allow concurrent creation of mod_hdr entries
Mod_hdr entries creation is fully synchronized by mod_hdr_tbl->lock. In
order to allow concurrent allocation of hardware resources used to offload
header rewrite, extend mlx5e_mod_hdr_entry with 'res_ready' completion.
Move call to mlx5_modify_header_alloc() out of mod_hdr_tbl->lock critical
section. Modify code that attaches new flows to existing mh to wait for
'res_ready' completion before using the entry. Insert mh to mod_hdr table
before provisioning it to hardware and modify all users of mod_hdr table to
verify that mh was fully initialized by checking completion result for
negative value (and to wait for 'res_ready' completion, if necessary).
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Fri, 9 Aug 2019 10:20:48 +0000 (13:20 +0300)]
net/mlx5e: Protect mod_hdr hash table with mutex
To remove dependency on rtnl lock, protect mod_hdr hash table from
concurrent modifications with new mutex.
Implement helper function to get flow namespace to prevent code
duplication.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Fri, 8 Jun 2018 19:10:09 +0000 (22:10 +0300)]
net/mlx5e: Protect mod header entry flows list with spinlock
To remove dependency on rtnl lock, extend mod header entry with spinlock
and use it to protect list of flows attached to mod header entry from
concurrent modifications.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Fri, 1 Jun 2018 18:47:43 +0000 (21:47 +0300)]
net/mlx5e: Extend mod header entry with reference counter
List of flows attached to mod header entry is used as implicit reference
counter (mod header entry is deallocated when list becomes free) and as a
mechanism to obtain mod header entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to mod header entry is possible. Proper atomic reference counter
is required to support concurrent access.
As a preparation for extending mod header with reference counting, extract
code that lookups and deletes mod header entry into standalone put/get
helpers. In order to remove this dependency on external locking, extend mod
header entry with reference counter to manage its lifetime and extend flow
structure with direct pointer to mod header entry that flow is attached to.
To remove code duplication between legacy and switchdev mode
implementations that both support mod_hdr functionality, store mod_hdr
table in dedicated structure used by both fdb and kernel namespaces. New
table structure is extended with table lock by one of the following patches
in this series. Implement helper function to get correct mod_hdr table
depending on flow namespace.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Thu, 1 Aug 2019 13:54:54 +0000 (16:54 +0300)]
net/mlx5e: Allow concurrent creation of hairpin entries
Hairpin entries creation is fully synchronized by hairpin_tbl_lock. In
order to allow concurrent initialization of mlx5e_hairpin structure
instances and provisioning of hairpin entries to hardware, extend
mlx5e_hairpin_entry with 'res_ready' completion. Move call to
mlx5e_hairpin_create() out of hairpin_tbl_lock critical section. Modify
code that attaches new flows to existing hpe to wait for 'res_ready'
completion before using the hpe. Insert hpe to hairpin table before
provisioning it to hardware and modify all users of hairpin table to verify
that hpe was fully initialized by checking hpe->hp pointer (and to wait for
'res_ready' completion, if necessary).
Modify dead peer update event handling function to save hpe's to temporary
list with their reference counter incremented. Wait for completion of hpe's
in temporary list and update their 'peer_gone' flag outside of
hairpin_tbl_lock critical section.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Wed, 31 Jul 2019 15:19:06 +0000 (18:19 +0300)]
net/mlx5e: Protect hairpin hash table with mutex
To remove dependency on rtnl lock, protect hairpin hash table from
concurrent modifications with new "hairpin_tbl_lock" mutex.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Thu, 7 Jun 2018 20:01:40 +0000 (23:01 +0300)]
net/mlx5e: Protect hairpin entry flows list with spinlock
To remove dependency on rtnl lock, extend hairpin entry with spinlock and
use it to protect list of flows attached to hairpin entry from concurrent
modifications.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Vlad Buslov [Fri, 8 Jun 2018 16:26:50 +0000 (19:26 +0300)]
net/mlx5e: Extend hairpin entry with reference counter
List of flows attached to hairpin entry is used as implicit reference
counter (hairpin entry is deallocated when list becomes free) and as a
mechanism to obtain hairpin entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to hairpin entry is possible. Proper atomic reference counter is
required to support concurrent access.
As a preparation for extending hairpin with reference counting, extract
code that deletes hairpin entry into standalone function. In order to
remove this dependency on external locking, extend hairpin entry with
reference counter to manage its lifetime and extend flow structure with
direct pointer to hairpin entry that flow is attached to.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
David S. Miller [Fri, 9 Aug 2019 20:44:33 +0000 (13:44 -0700)]
Merge branch 'hns3-next'
Huazhong Tan says:
====================
net: hns3: add some bugfixes & optimizations & cleanups for HNS3 driver
This patch-set includes code optimizations, bugfixes and cleanups for
the HNS3 ethernet controller driver.
[patch 01/12] fixes a GFP flag error.
[patch 02/12] fixes a VF interrupt error.
[patch 03/12] adds a cleanup for VLAN handling.
[patch 04/12] fixes a bug in debugfs.
[patch 05/12] modifies pause displaying format.
[patch 06/12] adds more DFX information for ethtool -d.
[patch 07/12] adds more TX statistics information.
[patch 08/12] adds a check for TX BD number.
[patch 09/12] adds a cleanup for dumping NCL_CONFIG.
[patch 10/12] refines function for querying MAC pause statistics.
[patch 11/12] adds a handshake with VF when doing PF reset.
[patch 12/12] refines some macro definitions.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Guojia Liao [Fri, 9 Aug 2019 02:31:18 +0000 (10:31 +0800)]
net: hns3: refine some macro definitions
Macro arguments should be enclosed in parentheses, in case of
expression argument, but parentheses of pure number in macro
definition should be removed for simplicity.
Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Huazhong Tan [Fri, 9 Aug 2019 02:31:17 +0000 (10:31 +0800)]
net: hns3: add handshake with VF for PF reset
Before PF asserting function reset, it should make sure
that all its VFs have been ready, otherwise, it will cause
some hardware errors.
So this patch adds function hclge_func_reset_sync_vf() to
synchronize VF before asserting PF function reset. For new
firmware which supports command HCLGE_OPC_QUERY_VF_RST_RDY,
we will try to query VFs' ready status within 30 seconds.
And keep the old implementation for compatible with firmware
which does not support this command.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yufeng Mo [Fri, 9 Aug 2019 02:31:16 +0000 (10:31 +0800)]
net: hns3: refine MAC pause statistics querying function
This patch refines the interface for querying MAC pause
statistics, and adds structure hns3_mac_stats to keep the
count of TX & RX.
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yufeng Mo [Fri, 9 Aug 2019 02:31:15 +0000 (10:31 +0800)]
net: hns3: add function display NCL_CONFIG info
This adds a new function hclge_ncl_config_data_print()
to print the data of NCL_CONFIG, to make the code more
readable. Also, using macro replaces some magic number.
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 9 Aug 2019 02:31:14 +0000 (10:31 +0800)]
net: hns3: add check for max TX BD num for tso and non-tso case
Hardware supports up to 8 TX BD for non-TSO skb and 63 TX
BD for TSO skb. Currently hns3 driver does not check the max
BD num that required by a skb before filling desc, which may
cause the hardware to issue a RAS error throug PCIe AER.
This patch adds the max BD num check before filling desc,
if the bd num is not within the hardware limit, it will
record the error by ring->stats.sw_err_cnt counter and
free the skb.
This patch also cleans up the hns3_nic_bd_num function by
changing the return type and removing an unnecessary check.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 9 Aug 2019 02:31:13 +0000 (10:31 +0800)]
net: hns3: add some statitics info to tx process
This patch adds tx_vlan_err, tx_l4_proto_err, tx_l2l3l4_err
and tx_tso_err counter to tx process, in order to better
debug the desc filling error.
This patch also adds a missing u64_stats_update_* around
ring->stats.sw_err_cnt and adds hns3_rl_err to limit the
error printing in the IO patch.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Guangbin Huang [Fri, 9 Aug 2019 02:31:12 +0000 (10:31 +0800)]
net: hns3: add DFX registers information for ethtool -d
Now we can use ethtool -d command to dump some registers. However,
these registers information is not enough to find out where the problem is.
This patch adds DFX registers information after original registers
when use ethtool -d commmand to dump registers. Also, using macro
replaces some related magic number.
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yonglong Liu [Fri, 9 Aug 2019 02:31:11 +0000 (10:31 +0800)]
net: hns3: modify how pause options is displayed
Currently, the pause options of HNS3 shown like this:
"RX/TX" is always the same with "RX negotiated/TX negotiated".
Because of the driver covered the value of "RX/TX" with the value
of "RX negotiated/TX negotiated" after adjust link.
This patch records the pause configurations of the user, and never
covered them in adjust link.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yufeng Mo [Fri, 9 Aug 2019 02:31:10 +0000 (10:31 +0800)]
net: hns3: add input length check for debugfs write function
If the input length reaches the maximum value of size_t, the reverse is
triggered when 1 is added. In addition, there is no need to have such a
large length. Therefore, the input length should be checked and the value
should be less than or equal to 1024.
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Fri, 9 Aug 2019 02:31:09 +0000 (10:31 +0800)]
net: hns3: clean up for vlan handling in hns3_fill_desc_vtags
This patch refactors the hns3_fill_desc_vtags function
by avoiding passing too many parameters, reducing indent
level and some other clean up.
This patch also adds the hns3_fill_skb_desc function to
fill the first desc of a skb.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Huazhong Tan [Fri, 9 Aug 2019 02:31:08 +0000 (10:31 +0800)]
net: hns3: fix interrupt clearing error for VF
Currently, VF driver has two kinds of interrupts, reset & CMDQ RX.
For revision 0x21, according to the UM, each interrupt should be
cleared by write 0 to the corresponding bit, but the implementation
writes 0 to the whole register in fact, it will clear other
interrupt at the same time, then the VF will loss the interrupt.
But for revision 0x20, this interrupt clear register is a read &
write register, for compatible, we just keep the old implementation
for 0x20.
This patch fixes it, also, adds a new register for reading the interrupt
status according to hardware user manual.
Fixes: e2cb1dec9779 ("net: hns3: Add HNS3 VF HCL(Hardware Compatibility Layer) Support")
Fixes: b90fcc5bd904 ("net: hns3: add reset handling for VF when doing Core/Global/IMP reset")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Zhongzhu Liu [Fri, 9 Aug 2019 02:31:07 +0000 (10:31 +0800)]
net: hns3: fix GFP flag error in hclge_mac_update_stats()
When CONFIG_DEBUG_ATOMIC_SLEEP on, calling kzalloc with
GFP_KERNEL in hclge_mac_update_stats() will get below warning:
[ 52.514677] BUG: sleeping function called from invalid context at mm/slab.h:501
[ 52.522051] in_atomic(): 0, irqs_disabled(): 0, pid: 1015, name: ifconfig
[ 52.528827] 2 locks held by ifconfig/1015:
[ 52.532921] #0: (____ptrval____) (&p->lock){....}, at: seq_read+0x54/0x748
[ 52.539878] #1: (____ptrval____) (rcu_read_lock){....}, at: dev_seq_start+0x0/0x140
[ 52.547610] CPU: 16 PID: 1015 Comm: ifconfig Not tainted
5.3.0-rc3-00697-g20b80be #98
[ 52.555408] Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V3.B050.01 08/08/2019
[ 52.564242] Call trace:
[ 52.566687] dump_backtrace+0x0/0x1f8
[ 52.570338] show_stack+0x14/0x20
[ 52.573646] dump_stack+0xb4/0xec
[ 52.576950] ___might_sleep+0x178/0x198
[ 52.580773] __might_sleep+0x74/0xe0
[ 52.584338] __kmalloc+0x244/0x2d8
[ 52.587744] hclge_mac_update_stats+0xc8/0x1f8 [hclge]
[ 52.592870] hclge_update_stats+0xe0/0x170 [hclge]
[ 52.597651] hns3_nic_get_stats64+0xa0/0x458 [hns3]
[ 52.602514] dev_get_stats+0x58/0x138
[ 52.606165] dev_seq_printf_stats+0x8c/0x280
[ 52.610420] dev_seq_show+0x14/0x40
[ 52.613898] seq_read+0x574/0x748
[ 52.617205] proc_reg_read+0xb4/0x108
[ 52.620857] __vfs_read+0x54/0xa8
[ 52.624162] vfs_read+0xa0/0x190
[ 52.627380] ksys_read+0xc8/0x178
[ 52.630685] __arm64_sys_read+0x40/0x50
[ 52.634509] el0_svc_common.constprop.0+0x120/0x1e0
[ 52.639369] el0_svc_handler+0x50/0x90
[ 52.643106] el0_svc+0x8/0xc
So this patch uses GFP_ATOMIC instead of GFP_KERNEL to fix it.
Fixes: d174ea75c96a ("net: hns3: add statistics for PFC frames and MAC control frames")
Signed-off-by: Zhongzhu Liu <liuzhongzhu@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
YueHaibing [Fri, 9 Aug 2019 01:49:23 +0000 (09:49 +0800)]
taprio: remove unused variable 'entry_list_policy'
net/sched/sch_taprio.c:680:32: warning:
entry_list_policy defined but not used [-Wunused-const-variable=]
One of the points of commit
a3d43c0d56f1 ("taprio: Add support adding
an admin schedule") is that it removes support (it now returns "not
supported") for schedules using the TCA_TAPRIO_ATTR_SCHED_SINGLE_ENTRY
attribute (which were never used), the parsing of those types of schedules
was the only user of this policy. So removing this policy should be fine.
Reported-by: Hulk Robot <hulkci@huawei.com>
Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Holger Hoffstätte [Thu, 8 Aug 2019 22:02:40 +0000 (00:02 +0200)]
r8169: fix performance issue on RTL8168evl
Disabling TSO but leaving SG active results is a significant
performance drop. Therefore disable also SG on RTL8168evl.
This restores the original performance.
Fixes: 93681cd7d94f ("r8169: enable HW csum and TSO")
Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Josh Hunt [Wed, 7 Aug 2019 23:52:30 +0000 (19:52 -0400)]
tcp: Update TCP_BASE_MSS comment
TCP_BASE_MSS is used as the default initial MSS value when MTU probing is
enabled. Update the comment to reflect this.
Suggested-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Josh Hunt [Wed, 7 Aug 2019 23:52:29 +0000 (19:52 -0400)]
tcp: add new tcp_mtu_probe_floor sysctl
The current implementation of TCP MTU probing can considerably
underestimate the MTU on lossy connections allowing the MSS to get down to
48. We have found that in almost all of these cases on our networks these
paths can handle much larger MTUs meaning the connections are being
artificially limited. Even though TCP MTU probing can raise the MSS back up
we have seen this not to be the case causing connections to be "stuck" with
an MSS of 48 when heavy loss is present.
Prior to pushing out this change we could not keep TCP MTU probing enabled
b/c of the above reasons. Now with a reasonble floor set we've had it
enabled for the past 6 months.
The new sysctl will still default to TCP_MIN_SND_MSS (48), but gives
administrators the ability to control the floor of MSS probing.
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>