Remove unnecessary label chunk_exit and return directly.
Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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>
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>
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>
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>
* a minstrel HT sample check fix
* peer measurement could double-free on races
* certificate file generation at build time could
sometimes hang
* some parameters weren't reset between connections
in mac80211
* some extensible elements were treated as non-
extensible, possibly causuing bad connections
(or failures) if the AP adds data
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Merge tag 'mac80211-for-net-2021-06-18' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
A couple of straggler fixes:
* a minstrel HT sample check fix
* peer measurement could double-free on races
* certificate file generation at build time could
sometimes hang
* some parameters weren't reset between connections
in mac80211
* some extensible elements were treated as non-
extensible, possibly causuing bad connections
(or failures) if the AP adds data
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds a new icmp.sh selftest for testing that the kernel will respond
correctly with an ICMP unreachable message with the dummy (192.0.0.8)
source address when there are no IPv4 addresses configured to use as source
addresses.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
When constructing ICMP response messages, the kernel will try to pick a
suitable source address for the outgoing packet. However, if no IPv4
addresses are configured on the system at all, this will fail and we end up
producing an ICMP message with a source address of 0.0.0.0. This can happen
on a box routing IPv4 traffic via v6 nexthops, for instance.
Since 0.0.0.0 is not generally routable on the internet, there's a good
chance that such ICMP messages will never make it back to the sender of the
original packet that the ICMP message was sent in response to. This, in
turn, can create connectivity and PMTUd problems for senders. Fortunately,
RFC7600 reserves a dummy address to be used as a source for ICMP
messages (192.0.0.8/32), so let's teach the kernel to substitute that
address as a last resort if the regular source address selection procedure
fails.
Below is a quick example reproducing this issue with network namespaces:
ip netns add ns0
ip l add type veth peer netns ns0
ip l set dev veth0 up
ip a add 10.0.0.1/24 dev veth0
ip a add fc00:dead:cafe:42::1/64 dev veth0
ip r add 10.1.0.0/24 via inet6 fc00:dead:cafe:42::2
ip -n ns0 l set dev veth0 up
ip -n ns0 a add fc00:dead:cafe:42::2/64 dev veth0
ip -n ns0 r add 10.0.0.0/24 via inet6 fc00:dead:cafe:42::1
ip netns exec ns0 sysctl -w net.ipv4.icmp_ratelimit=0
ip netns exec ns0 sysctl -w net.ipv4.ip_forward=1
tcpdump -tpni veth0 -c 2 icmp &
ping -w 1 10.1.0.1 > /dev/null
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on veth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
IP 10.0.0.1 > 10.1.0.1: ICMP echo request, id 29, seq 1, length 64
IP 0.0.0.0 > 10.0.0.1: ICMP net 10.1.0.1 unreachable, length 92
2 packets captured
2 packets received by filter
0 packets dropped by kernel
With this patch the above capture changes to:
IP 10.0.0.1 > 10.1.0.1: ICMP echo request, id 31127, seq 1, length 64
IP 192.0.0.8 > 10.0.0.1: ICMP net 10.1.0.1 unreachable, length 92
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: Juliusz Chroboczek <jch@irif.fr>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As documented in Documentation/networking/driver.rst, the ndo_start_xmit
method must not return NETDEV_TX_BUSY under any normal circumstances, and
as recommended, we simply stop the tx queue in advance, when there is a
risk that the next xmit would cause a NETDEV_TX_BUSY return.
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Just as the initial check, we need to ensure num_frag+1 buffers available,
as that is the number of buffers we are going to use.
This fixes a buffer overflow, which might be seen during heavy network
load. Complete lockup of TEMAC was reproducible within about 10 minutes of
a particular load.
Fixes: 84823ff80f ("net: ll_temac: Fix race condition causing TX hang")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a couple of memory-barriers to ensure correct ordering of read/write
access to TX BDs.
In xmit_done, we should ensure that reading the additional BD fields are
only done after STS_CTRL_APP0_CMPLT bit is set.
When xmit_done marks the BD as free by setting APP0=0, we need to ensure
that the other BD fields are reset first, so we avoid racing with the xmit
path, which writes to the same fields.
Finally, making sure to read APP0 of next BD after the current BD, ensures
that we see all available buffers.
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
With the skb pointer piggy-backed on the TX BD, we have a simple and
efficient way to free the skb buffer when the frame has been transmitted.
But in order to avoid freeing the skb while there are still fragments from
the skb in use, we need to piggy-back on the TX BD of the skb, not the
first.
Without this, we are doing use-after-free on the DMA side, when the first
BD of a multi TX BD packet is seen as completed in xmit_done, and the
remaining BDs are still being processed.
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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>
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>
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>
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>
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>
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>
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>
Michael Chan says:
====================
bnxt_en: Bug fixes
This patchset includes 3 small bug fixes to reinitialize PHY capabilities
after firmware reset, setup the chip's internal TQM fastpath ring
backing memory properly for RoCE traffic, and to free ethtool related
memory if driver probe fails.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
bnxt_ethtool_init() may have allocated some memory and we need to
call bnxt_ethtool_free() to properly unwind if bnxt_init_one()
fails.
Fixes: 7c38091814 ("bnxt_en: Refactor bnxt_init_one() and turn on TPA support on 57500 chips.")
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
TQM fastpath ring needs to be sized to store both the requester
and responder side of RoCE QPs in TQM for supporting bi-directional
tests. Fix bnxt_alloc_ctx_mem() to multiply the RoCE QPs by a factor of
2 when computing the number of entries for TQM fastpath ring. This
fixes an RX pipeline stall issue when running bi-directional max
RoCE QP tests.
Fixes: c7dd7ab4b2 ("bnxt_en: Improve TQM ring context memory sizing formulas.")
Signed-off-by: Rukhsana Ansari <rukhsana.ansari@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is a missing bnxt_probe_phy() call in bnxt_fw_init_one() to
rediscover the PHY capabilities after a firmware reset. This can cause
some PHY related functionalities to fail after a firmware reset. For
example, in multi-host, the ability for any host to configure the PHY
settings may be lost after a firmware reset.
Fixes: ec5d31e3c1 ("bnxt_en: Handle firmware reset status during IF_UP.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
wengjianfeng
Vladimir Oltean
Yunsheng Lin
David S. Miller
Toke Høiland-Jørgensen
Esben Haabendal
Colin Ian King
Pavel Machek
dingsenjie
Dongliang Mu
Karsten Graul
Somnath Kotur
Rukhsana Ansari
Michael Chan
Jakub Kicinski
Qing Zhang
Peng Li
Geliang Tang
Paolo Abeni