Commit Graph

1016010 Commits

Author SHA1 Message Date
Stefano Garzarella 0de5b2e672 vsock: rename vsock_wait_data()
vsock_wait_data() is used only by STREAM and SEQPACKET sockets,
so let's rename it to vsock_connectible_wait_data(), using the same
nomenclature (connectible) used in other functions after the
introduction of SEQPACKET.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:59:53 -07:00
Stefano Garzarella cc97141afd vsock: rename vsock_has_data()
vsock_has_data() is used only by STREAM and SEQPACKET sockets,
so let's rename it to vsock_connectible_has_data(), using the same
nomenclature (connectible) used in other functions after the
introduction of SEQPACKET.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:59:53 -07:00
wengjianfeng 7437a2230e NFC: nxp-nci: remove unnecessary label
Remove unnecessary label chunk_exit and return directly.

Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:57:30 -07:00
Vladimir Oltean 61c77533b8 net: dsa: sja1105: completely error out in sja1105_static_config_reload if something fails
If reloading the static config fails for whatever reason, for example if
sja1105_static_config_check_valid() fails, then we "goto out_unlock_ptp"
but we print anyway that "Reset switch and programmed static config.",
which is confusing because we didn't. We also do a bunch of other stuff
like reprogram the XPCS and reload the credit-based shapers, as if a
switch reset took place, which didn't.

So just unlock the PTP lock and goto out, skipping all of that.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:26:17 -07:00
Vladimir Oltean 1303e7f9b6 net: dsa: sja1105: allow the TTEthernet configuration in the static config for SJA1110
Currently sja1105_static_config_check_valid() is coded up to detect
whether TTEthernet is supported based on device ID, and this check was
not updated to cover SJA1110.

However, it is desirable to have as few checks for the device ID as
possible, so the driver core is more generic. So what we can do is look
at the static config table operations implemented by that specific
switch family (populated by sja1105_static_config_init) whether the
schedule table has a non-zero maximum entry count (meaning that it is
supported) or not.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:26:17 -07:00
Yunsheng Lin 961045004b net: hns3: fix reuse conflict of the rx page
In the current rx page reuse handling process, the rx page buffer may
have conflict between driver and stack in high-pressure scenario.

To fix this problem, we need to check whether the page is only owned
by driver at the begin and at the end of a page to make sure there is
no reuse conflict between driver and stack when desc_cb->page_offset
is rollbacked to zero or increased.

Fixes: fa7711b888 ("net: hns3: optimize the rx page reuse handling process")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:26:17 -07:00
Vladimir Oltean cb5a82d2b9 net: dsa: sja1105: properly power down the microcontroller clock for SJA1110
It turns out that powering down the BASE_TIMER_CLK does not turn off the
microcontroller, just its timers, including the one for the watchdog.
So the embedded microcontroller is still running, and potentially still
doing things.

To prevent unwanted interference, we should power down the BASE_MCSS_CLK
as well (MCSS = microcontroller subsystem).

The trouble is that currently we turn off the BASE_TIMER_CLK for SJA1110
from the .clocking_setup() method, mostly because this is a Clock
Generation Unit (CGU) setting which was traditionally configured in that
method for SJA1105. But in SJA1105, the CGU was used for bringing up the
port clocks at the proper speeds, and in SJA1110 it's not (but rather
for initial configuration), so it's best that we rebrand the
sja1110_clocking_setup() method into what it really is - an implementation
of the .disable_microcontroller() method.

Since disabling the microcontroller only needs to be done once, at probe
time, we can choose the best place to do that as being in sja1105_setup(),
before we upload the static config to the device. This guarantees that
the static config being used by the switch afterwards is really ours.

Note that the procedure to upload a static config necessarily resets the
switch. This already did not reset the microcontroller, only the switch
core, so since the .disable_microcontroller() method is guaranteed to be
called by that point, if it's disabled, it remains disabled. Add a
comment to make that clear.

With the code movement for SJA1110 from .clocking_setup() to
.disable_microcontroller(), both methods are optional and are guarded by
"if" conditions.

Tested by enabling in the device tree the rev-mii switch port 0 that
goes towards the microcontroller, and flashing a firmware that would
have networking. Without this patch, the microcontroller can be pinged,
with this patch it cannot.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:26:17 -07:00
Colin Ian King 60ae9f8831 qlcnic: remove redundant continue statement
The continue statement at the end of a for-loop has no effect,
it is redundant and can be removed.

Addresses-Coverity: ("Continue has no effect")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:08:40 -07:00
Colin Ian King 040c12570e net: bridge: remove redundant continue statement
The continue statement at the end of a for-loop has no effect,
invert the if expression and remove the continue.

Addresses-Coverity: ("Continue has no effect")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:08:40 -07:00
Colin Ian King c44924c532 net: stmmac: remove redundant continue statement
The continue statement in the for-loop has no effect, remove it.

Addresses-Coverity: ("Continue has no effect")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:08:39 -07:00
Pavel Machek bd70957438 net: pxa168_eth: Fix a potential data race in pxa168_eth_remove
Commit 0571a753cb cancelled delayed work too late, keeping small
race. Cancel work sooner to close it completely.

Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Fixes: 0571a753cb ("net: pxa168_eth: Fix a potential data race in pxa168_eth_remove")
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:08:39 -07:00
wengjianfeng 96a1931992 NFC: nxp-nci: remove unnecessary labels
Simplify the code by removing unnecessary labels and returning directly.

Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:08:39 -07:00
dingsenjie e44dc72482 ethernet: marvell/octeontx2: Simplify the return expression of npc_is_same
Simplify the return expression in the rvu_npc_fs.c

Signed-off-by: dingsenjie <dingsenjie@yulong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:07:48 -07:00
Dongliang Mu 9fd2bc3206 net: caif: modify the label out_err to out
Modify the label out_err to out to avoid the meanless kfree.

Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 12:07:09 -07:00
Jakub Kicinski 9d72b8da9f net: vlan: pass thru all GSO_SOFTWARE in hw_enc_features
Currently UDP tunnel devices on top of VLANs lose the ability
to offload UDP GSO. Widen the pass thru features from TSO
to all GSO_SOFTWARE.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:58:03 -07:00
Qing Zhang 68277749a0 dt-bindings: dwmac: Add bindings for new Loongson SoC and bridge chip
Add the dwmac bindings for the Loongson-2K SoC and the LS7A
bridge chip.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:51:16 -07:00
Qing Zhang 47a311c31a MIPS: Loongson64: DTS: Add GMAC support for LS7A PCH
The GMAC module is now supported, enable it.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:48:34 -07:00
Qing Zhang f8a1142507 MIPS: Loongson64: Add GMAC support for Loongson-2K1000
The GMAC module is now supported, enable it.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:48:34 -07:00
Qing Zhang 30bba69d7d stmmac: pci: Add dwmac support for Loongson
This GMAC module is integrated into the Loongson-2K SoC and the LS7A
bridge chip.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:48:34 -07:00
David S. Miller 909cca8cab Merge branch 'hostess_sv11-cleanups'
Peng Li says:

====================
net: hostess_sv11: clean up some code style issues

This patchset clean up some code style issues.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:40 -07:00
Peng Li 7d40bfc193 net: hostess_sv11: fix the alignment issue
Alignment should match open parenthesis.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:40 -07:00
Peng Li 67c1876897 net: hostess_sv11: fix the comments style issue
Networking block comments don't use an empty /* line,
use /* Comment...

Block comments use * on subsequent lines.
Block comments use a trailing */ on a separate line.

This patch fixes the comments style issues.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:40 -07:00
Peng Li d25a944693 net: hostess_sv11: remove dead code
This patch removes the dead code.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:40 -07:00
Peng Li 9562aef3c0 net: hostess_sv11: fix the code style issue about switch and case
According to the chackpatch.pl,
switch and case should be at the same indent.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:40 -07:00
Peng Li 534f76d462 net: hostess_sv11: remove trailing whitespace
This patch removes trailing whitespace.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:39 -07:00
Peng Li fe9be8daef net: hostess_sv11: move out assignment in if condition
Should not use assignment in if condition.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:39 -07:00
Peng Li fefed8af5e net: hostess_sv11: fix the code style issue about "foo* bar"
Fix the checkpatch error as "foo* bar" should be "foo *bar".

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:42:39 -07:00
David S. Miller a778e93de6 Merge branch 'mptcp-dss-checksums'
Mat Martineau says:

====================
mptcp: DSS checksum support

RFC 8684 defines a DSS checksum feature that allows MPTCP to detect
middlebox interference with the MPTCP DSS header and the portion of the
data stream associated with that header. So far, the MPTCP
implementation in the Linux kernel has not supported this feature.

This patch series adds DSS checksum support. By default, the kernel will
not request checksums when sending SYN or SYN/ACK packets for MPTCP
connections. Outgoing checksum requests can be enabled with a
per-namespace net.mptcp.checksum_enabled sysctl. MPTCP connections will
now proceed with DSS checksums when the peer requests them, whether the
sysctl is enabled or not.

Patches 1-5 add checksum bits to the outgoing SYN, SYN/ACK, and data
packet headers. This includes calculating the checksum using a range of
data and the MPTCP DSS mapping for that data.

Patches 6-10 handle the checksum request in the SYN or SYN/ACK, and
receiving and verifying the DSS checksum on data packets.

Patch 11 adjusts the MPTCP-level retransmission process for checksum
compatibility.

Patches 12-14 add checksum-related MIBs, the net.mptcp.checksum_enabled
sysctl, and a checksum field to debug trace output.

Patches 15 & 16 add selftests.

The series is slightly longer than the preferred 15-patch limit that
patchwork warns about. I do try to stay below that whenever possible -
this series does implement one feature and is, I think, cohesive enough
to justify keeping it together. If it's at all problematic please let me
know!

A trivial merge conflict with net/master is introduced in patch 15: a
commit in net/master removes a couple of nearby lines of code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:12 -07:00
Geliang Tang af66d3e1c3 selftests: mptcp: enable checksum in mptcp_join.sh
This patch added a new argument "-C" for the mptcp_join.sh script to set
the sysctl checksum_enabled to 1 in ns1 and ns2 to enable the data
checksum.

In chk_join_nr, check the counter of the mib for the data checksum.

Also added a new argument "-S" for the mptcp_join.sh script to start the
test cases that verify the checksum handshake:

  * Sender and listener both have checksums off
  * Sender and listener both have checksums on
  * Sender checksums off, listener checksums on
  * Sender checksums on, listener checksums off

The output looks like this:

 01 checksum test 0 0                  sum[ ok ] - csum  [ ok ]
 02 checksum test 1 1                  sum[ ok ] - csum  [ ok ]
 03 checksum test 0 1                  sum[ ok ] - csum  [ ok ]
 04 checksum test 1 0                  sum[ ok ] - csum  [ ok ]
 05 no JOIN                            syn[ ok ] - synack[ ok ] - ack[ ok ]
                                       sum[ ok ] - csum  [ ok ]
 06 single subflow, limited by client  syn[ ok ] - synack[ ok ] - ack[ ok ]
                                       sum[ ok ] - csum  [ ok ]

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 94d66ba1d8 selftests: mptcp: enable checksum in mptcp_connect.sh
This patch added a new argument "-C" for the mptcp_connect.sh script to
set the sysctl checksum_enabled to 1 in ns1, ns2, ns3 and ns4 to enable
the data checksum.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 401e3030e6 mptcp: dump csum fields in mptcp_dump_mpext
In mptcp_dump_mpext, dump the csum fields, csum and csum_reqd in struct
mptcp_dump_mpext too.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang fc3c82eebf mptcp: add a new sysctl checksum_enabled
This patch added a new sysctl, named checksum_enabled, to control
whether DSS checksum can be enabled.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang fe3ab1cbd3 mptcp: add the mib for data checksum
This patch added the mib for the data checksum, MPTCP_MIB_DATACSUMERR.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Paolo Abeni 4e14867d5e mptcp: tune re-injections for csum enabled mode
If the MPTCP-level checksum is enabled, on re-injections we
must spool a complete DSS, or the receive side will not be
able to compute the csum and process any data.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Paolo Abeni dd8bcd1768 mptcp: validate the data checksum
This patch added three new members named data_csum, csum_len and
map_csum in struct mptcp_subflow_context, implemented a new function
named mptcp_validate_data_checksum().

If the current mapping is valid and csum is enabled traverse the later
pending skbs and compute csum incrementally till the whole mapping has
been covered. If not enough data is available in the rx queue, return
MAPPING_EMPTY - that is, no data.

Next subflow_data_ready invocation will trigger again csum computation.

When the full DSS is available, validate the csum and return to the
caller an appropriate error code, to trigger subflow reset of fallback
as required by the RFC.

Additionally:
- if the csum prevence in the DSS don't match the negotiated value e.g.
  csum present, but not requested, return invalid mapping to trigger
  subflow reset.
- keep some csum state, to avoid re-compute the csum on the same data
  when multiple rx queue traversal are required.
- clean-up the uncompleted mapping from the receive queue on close, to
  allow proper subflow disposal

Co-developed-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 390b95a5fb mptcp: receive checksum for DSS
In mptcp_parse_option, adjust the expected_opsize, and always parse the
data checksum value from the receiving DSS regardless of csum presence.
Then save it in mp_opt->csum.

Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 208e8f6692 mptcp: receive checksum for MP_CAPABLE with data
This patch added a new member named csum in struct mptcp_options_received.

When parsing the MP_CAPABLE with data, if the checksum is enabled,
adjust the expected_opsize. If the receiving option length matches the
length with the data checksum, get the checksum value and save it in
mp_opt->csum. And in mptcp_incoming_options, pass it to mpext->csum.

We always parse any csum/nocsum combination and delay the presence check
to later code, to allow reset if missing.

Additionally, in the TX path, use the newly introduce ext field to avoid
MPTCP csum recomputation on TCP retransmission and unneeded csum update
on when setting the data fin_flag.

Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 0625118115 mptcp: add csum_reqd in mptcp_options_received
This patch added a new flag csum_reqd in struct mptcp_options_received, if
the flag MPTCP_CAP_CHECKSUM_REQD is set in the receiving MP_CAPABLE
suboption, set this flag.

In mptcp_sk_clone and subflow_finish_connect, if the csum_reqd flag is set,
enable the msk->csum_enabled flag.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang c863225b79 mptcp: add sk parameter for mptcp_get_options
This patch added a new parameter name sk in mptcp_get_options().

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang c5b39e26d0 mptcp: send out checksum for DSS
In mptcp_write_options, if the checksum is enabled, adjust the option
length and send out the data checksum with DSS suboption.

Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang c94b1f96dc mptcp: send out checksum for MP_CAPABLE with data
If the checksum is enabled, send out the data checksum with the
MP_CAPABLE suboption with data.

In mptcp_established_options_mp, save the data checksum in
opts->ext_copy.csum. In mptcp_write_options, adjust the option length and
send it out with the MP_CAPABLE suboption.

Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 06fe1719aa mptcp: add csum_reqd in mptcp_out_options
This patch added a new member csum_reqd in struct mptcp_out_options and
struct mptcp_subflow_request_sock. Initialized it with the helper
function mptcp_is_checksum_enabled().

In mptcp_write_options, if this field is enabled, send out the MP_CAPABLE
suboption with the MPTCP_CAP_CHECKSUM_REQD flag.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang d0cc298745 mptcp: generate the data checksum
This patch added a new member named csum in struct mptcp_ext, implemented
a new function named mptcp_generate_data_checksum().

Generate the data checksum in mptcp_sendmsg_frag, save it in mpext->csum.

Note that we must generate the csum for zero window probe, too.

Do the csum update incrementally, to avoid multiple csum computation
when the data is appended to existing skb.

Note that in a later patch we will skip unneeded csum related operation.
Changes not included here to keep the delta small.

Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
Geliang Tang 752e906732 mptcp: add csum_enabled in mptcp_sock
This patch added a new member named csum_enabled in struct mptcp_sock,
used a dummy mptcp_is_checksum_enabled() helper to initialize it.

Also added a new member named mptcpi_csum_enabled in struct mptcp_info
to expose the csum_enabled flag.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:40:11 -07:00
David S. Miller e7f3863c6d Merge branch 'seg6.end.dt6'
Andrea Mayer says:

====================
seg6: add support for SRv6 End.DT46 Behavior

SRv6 End.DT46 Behavior is defined in the IETF RFC 8986 [1] along with SRv6
End.DT4 and End.DT6 Behaviors.

The proposed End.DT46 implementation is meant to support the decapsulation
of both IPv4 and IPv6 traffic coming from a *single* SRv6 tunnel.
The SRv6 End.DT46 Behavior greatly simplifies the setup and operations of
SRv6 VPNs in the Linux kernel.

 - patch 1/2 is the core patch that adds support for the SRv6 End.DT46
   Behavior;

 - patch 2/2 adds the selftest for SRv6 End.DT46 Behavior.

The patch introducing the new SRv6 End.DT46 Behavior in iproute2 will
follow shortly.

Comments, suggestions and improvements are very welcome as always!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:35:47 -07:00
Andrea Mayer 03a0b567a0 selftests: seg6: add selftest for SRv6 End.DT46 Behavior
this selftest is designed for evaluating the new SRv6 End.DT46 Behavior
used, in this example, for implementing IPv4/IPv6 L3 VPN use cases.

Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Signed-off-by: Paolo Lungaroni <paolo.lungaroni@uniroma2.it>
Acked-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:35:47 -07:00
Andrea Mayer 8b532109bf seg6: add support for SRv6 End.DT46 Behavior
IETF RFC 8986 [1] includes the definition of SRv6 End.DT4, End.DT6, and
End.DT46 Behaviors.

The current SRv6 code in the Linux kernel only implements End.DT4 and
End.DT6 which can be used respectively to support IPv4-in-IPv6 and
IPv6-in-IPv6 VPNs. With End.DT4 and End.DT6 it is not possible to create a
single SRv6 VPN tunnel to carry both IPv4 and IPv6 traffic.

The proposed End.DT46 implementation is meant to support the decapsulation
of IPv4 and IPv6 traffic coming from a single SRv6 tunnel.
The implementation of the SRv6 End.DT46 Behavior in the Linux kernel
greatly simplifies the setup and operations of SRv6 VPNs.

The SRv6 End.DT46 Behavior leverages the infrastructure of SRv6 End.DT{4,6}
Behaviors implemented so far, because it makes use of a VRF device in
order to force the routing lookup into the associated routing table.

To make the End.DT46 work properly, it must be guaranteed that the routing
table used for routing lookup operations is bound to one and only one VRF
during the tunnel creation. Such constraint has to be enforced by enabling
the VRF strict_mode sysctl parameter, i.e.:

 $ sysctl -wq net.vrf.strict_mode=1

Note that the same approach is used for the SRv6 End.DT4 Behavior and for
the End.DT6 Behavior in VRF mode.

The command used to instantiate an SRv6 End.DT46 Behavior is
straightforward, i.e.:

 $ ip -6 route add 2001:db8::1 encap seg6local action End.DT46 vrftable 100 dev vrf100.

[1] https://www.rfc-editor.org/rfc/rfc8986.html#name-enddt46-decapsulation-and-s

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Performance and impact of SRv6 End.DT46 Behavior on the SRv6 Networking
=======================================================================

This patch aims to add the SRv6 End.DT46 Behavior with minimal impact on
the performance of SRv6 End.DT4 and End.DT6 Behaviors.
In order to verify this, we tested the performance of the newly introduced
SRv6 End.DT46 Behavior and compared it with the performance of SRv6
End.DT{4,6} Behaviors, considering both the patched kernel and the kernel
before applying the End.DT46 patch (referred to as vanilla kernel).

In details, the following decapsulation scenarios were considered:

 1.a) IPv6 traffic in SRv6 End.DT46 Behavior on patched kernel;
 1.b) IPv4 traffic in SRv6 End.DT46 Behavior on patched kernel;
 2.a) SRv6 End.DT6 Behavior (VRF mode) on patched kernel;
 2.b) SRv6 End.DT4 Behavior on patched kernel;
 3.a) SRv6 End.DT6 Behavior (VRF mode) on vanilla kernel (without the
      End.DT46 patch);
 3.b) SRv6 End.DT4 Behavior on vanilla kernel (without the End.DT46 patch).

All tests were performed on a testbed deployed on the CloudLab [2]
facilities. We considered IPv{4,6} traffic handled by a single core (at 2.4
GHz on a Xeon(R) CPU E5-2630 v3) on kernel 5.13-rc1 using packets of size
~ 100 bytes.

Scenario (1.a): average 684.70 kpps; std. dev. 0.7 kpps;
Scenario (1.b): average 711.69 kpps; std. dev. 1.2 kpps;
Scenario (2.a): average 690.70 kpps; std. dev. 1.2 kpps;
Scenario (2.b): average 722.22 kpps; std. dev. 1.7 kpps;
Scenario (3.a): average 690.02 kpps; std. dev. 2.6 kpps;
Scenario (3.b): average 721.91 kpps; std. dev. 1.2 kpps;

Considering the results for the patched kernel (1.a, 1.b, 2.a, 2.b) we
observe that the performance degradation incurred in using End.DT46 rather
than End.DT6 and End.DT4 respectively for IPv6 and IPv4 traffic is minimal,
around 0.9% and 1.5%. Such very minimal performance degradation is the
price to be paid if one prefers to use a single tunnel capable of handling
both types of traffic (IPv4 and IPv6).

Comparing the results for End.DT4 and End.DT6 under the patched and the
vanilla kernel (2.a, 2.b, 3.a, 3.b) we observe that the introduction of the
End.DT46 patch has no impact on the performance of End.DT4 and End.DT6.

[2] https://www.cloudlab.us

Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:35:47 -07:00
Ioana Ciornei 5a336f97f1 Documentation: ACPI: DSD: fix block code comments
Use the '.. code-block:: none' to properly highlight the documented DSDT
entries. This also fixes warnings in the documentation build process.

Fixes: e71305acd8 ("Documentation: ACPI: DSD: Document MDIO PHY")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:32:02 -07:00
Ioana Ciornei 79ab2b3703 Documentation: ACPI: DSD: include phy.rst in the toctree
Include the new phy.rst into the index of the ACPI support
documentation.

Fixes: e71305acd8 ("Documentation: ACPI: DSD: Document MDIO PHY")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:32:02 -07:00
Colin Ian King d1434cf513 net: neterion: vxge: remove redundant continue statement
The continue statement at the end of a for-loop has no effect,
invert the if expression and remove the continue.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-18 11:29:40 -07:00