This patch adds a helper function to set up the netlink and nfnetlink headers.
Update existing codebase to use it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch adds a helper function to calculate the base sequence number
field that is stored in the nfnetlink header. Use the helper function
whenever possible.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
The spinlock nf_tables_destroy_list_lock is initialized statically.
It is unnecessary to initialize by spin_lock_init().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Move dst_check() to the garbage collector path. Stale routes trigger the
flow entry teardown state which makes affected flows go back to the
classic forwarding path to re-evaluate flow offloading.
IPv6 requires the dst cookie to work, store it in the flow_tuple,
otherwise dst_check() always fails.
Fixes: e5075c0bad ("netfilter: flowtable: call dst_check() to fall back to classic forwarding")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
struct ip_set is declared twice. One is declared at 79th line,
so remove the duplicate.
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Acked-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
modprobe calls from the nf_logger_find_get() API causes deadlock in very
special cases because they occur with the nf_tables transaction mutex held.
In the specific case of nf_log, deadlock is via:
A nf_tables -> transaction mutex -> nft_log -> modprobe -> nf_log_syslog \
-> pernet_ops rwsem -> wait for C
B netlink event -> rtnl_mutex -> nf_tables transaction mutex -> wait for A
C close() -> ip6mr_sk_done -> rtnl_mutex -> wait for B
Earlier patch added NFLOG/xt_LOG module softdeps to avoid the need to load
the backend module during a transaction.
For nft_log we would have to add a softdep for both nfnetlink_log or
nf_log_syslog, since we do not know in advance which of the two backends
are going to be configured.
This defers the modprobe op until after the transaction mutex is released.
Tested-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
xt_LOG has no direct dependency on the syslog-based logger, it relies
on the nf_log core to probe the requested backend.
Now that all syslog-based loggers reside in the same module, we can
just add a soft dependency on nf_log_syslog and let modprobe take
care of it.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Remove nf_log_common. Now that all per-af modules have been merged
there is no longer a need to provide a helper module.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Provide bridge log support from nf_log_syslog.
After the merge there is no need to load the "real packet loggers",
all of them now reside in the same module.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Provide netdev family support from the nf_log_syslog module.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This removes the nf_log_ipv6 module, the functionality is now
provided by nf_log_syslog.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
similar to previous change: nf_log_syslog now covers ARP logging
as well, the old nf_log_arp module is removed.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Netfilter has multiple log modules:
nf_log_arp
nf_log_bridge
nf_log_ipv4
nf_log_ipv6
nf_log_netdev
nfnetlink_log
nf_log_common
With the exception of nfnetlink_log (packet is sent to userspace for
dissection/logging), all of them log to the kernel ringbuffer.
This is the first part of a series to merge all modules except
nfnetlink_log into a single module: nf_log_syslog.
This allows to reduce code. After the series, only two log modules remain:
nfnetlink_log and nf_log_syslog. The latter provides the same
functionality as the old per-af log modules.
This renames nf_log_ipv4 to nf_log_syslog.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
It already has null pointer check in kfree_skb(),
remove pointless pointer check before kfree_skb().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cross time-stamping mechanism used in certain instance of Intel mGbE
may run at different clock frequency in comparison to the clock
frequency used by processor, so we introduce cross T/S frequency
adjustment to ensure TSC calculation is correct when processor got the
cross time-stamps.
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There's no need to declare a list and then init it manually,
just use the LIST_HEAD() macro.
Signed-off-by: Shixin Liu <liushixin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
spinlock can be initialized automatically with DEFINE_SPINLOCK()
rather than explicitly calling spin_lock_init().
Changelog:
From v1:
1. fix the mistake reported by kernel test robot.
Signed-off-by: Shixin Liu <liushixin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Andreas Roeseler says:
====================
add support for RFC 8335 PROBE
The popular utility ping has several severe limitations, such as the
inability to query specific interfaces on a node and requiring
bidirectional connectivity between the probing and probed interfaces.
RFC 8335 attempts to solve these limitations by creating the new utility
PROBE which is a specialized ICMP message that makes use of the ICMP
Extension Structure outlined in RFC 4884.
This patchset adds definitions for the ICMP Extended Echo Request and
Reply (PROBE) types for both IPV4 and IPV6, adds a sysctl to enable
responses to PROBE messages, expands the list of supported ICMP messages
to accommodate PROBE types, adds ipv6_dev_find into ipv6_stubs, and adds
functionality to respond to PROBE requests.
Changes:
v1 -> v2:
- Add AFI definitions
- Switch to functions such as dev_get_by_name and ip_dev_find to lookup
net devices
v2 -> v3:
Suggested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>
- Add verification of incoming messages before looking up netdev
- Add prefix for PROBE specific defined variables
- Use proc_dointvec_minmax with zero and one for sysctl
- Create struct icmp_ext_echo_iio for parsing incoming packets
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
- Include net/addrconf.h library for ipv6_dev_find
v3 -> v4:
- Use in_addr instead of __be32 for storing IPV4 addresses
- Use IFNAMSIZ to statically allocate space for name in
icmp_ext_echo_iio
Suggested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>
- Use skb_header_pointer to verify fields in incoming message
- Add check to ensure that extobj_hdr.length is valid
- Check to ensure object payload is padded with ASCII NULL characters
when probing by name, as specified by RFC 8335
- Statically allocate buff using IFNAMSIZ
- Add rcu blocking around ipv6_dev_find
- Use __in_dev_get_rcu to access IPV4 addresses of identified
net_device
- Remove check for ICMPV6 PROBE types
v4 -> v5:
- Statically allocate buff to size IFNAMSIZ on declaration
- Remove goto probe in favor of single branch
- Remove strict check for incoming PROBE request padding to nearest
32-bit boundary
Reported-by: kernel test robot <lkp@intel.com>
v5 -> v6:
- Add documentation for icmp_echo_enable_probe sysctl
- Remove RCU locking around ipv6_dev_find()
- Assign iio based on ctype
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Modify the icmp_rcv function to check PROBE messages and call icmp_echo
if a PROBE request is detected.
Modify the existing icmp_echo function to respond ot both ping and PROBE
requests.
This was tested using a custom modification to the iputils package and
wireshark. It supports IPV4 probing by name, ifindex, and probing by
both IPV4 and IPV6 addresses. It currently does not support responding
to probes off the proxy node (see RFC 8335 Section 2).
The modification to the iputils package is still in development and can
be found here: https://github.com/Juniper-Clinic-2020/iputils.git. It
supports full sending functionality of PROBE requests, but currently
does not parse the response messages, which is why Wireshark is required
to verify the sent and recieved PROBE messages. The modification adds
the ``-e'' flag to the command which allows the user to specify the
interface identifier to query the probed host. An example usage would be
<./ping -4 -e 1 [destination]> to send a PROBE request of ifindex 1 to the
destination node.
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add ipv6_dev_find to ipv6_stub to allow lookup of net_devices by IPV6
address in net/ipv4/icmp.c.
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Modify the ping_supported function to support PROBE message types. This
allows tools such as the ping command in the iputils package to be
modified to send PROBE requests through the existing framework for
sending ping requests.
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Section 8 of RFC 8335 specifies potential security concerns of
responding to PROBE requests, and states that nodes that support PROBE
functionality MUST be able to enable/disable responses and that
responses MUST be disabled by default
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add definitions for the ICMPV6 type of Extended Echo Request and
Extended Echo Reply, as defined by sections 2 and 3 of RFC 8335.
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add definitions for PROBE ICMP types and codes.
Add AFI definitions for IP and IPV6 as specified by IANA
Add a struct to represent the additional header when probing by IP
address (ctype == 3) for use in parsing incoming PROBE messages
Add a struct to represent the entire Interface Identification Object
(IIO) section of an incoming PROBE packet
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function lan87xx_config_aneg_ext was introduced to configure
LAN95xxA but as well writes to undocumented register of LAN87xx.
This fix prevents that access.
The function lan87xx_config_aneg_ext gets more suitable for the new
behavior name.
Reported-by: Måns Rullgård <mans@mansr.com>
Fixes: 05b35e7eb9 ("smsc95xx: add phylib support")
Signed-off-by: Andre Edich <andre.edich@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'linux-can-next-for-5.13-20210330' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2021-03-30
this is a pull request of 39 patches for net-next/master.
The first two patches update the MAINTAINERS file. One is by me and
removes Dan Murphy from the from m_can and tcan4x5x. The other one is
by Pankaj Sharma and updates the maintainership of the m-can mmio
driver.
The next three patches are by me and update the CAN echo skb handling.
Vincent Mailhol provides 5 patches where Transmitter Delay
Compensation is added CAN bittiming calculation is cleaned up.
The next patch is by me and adds a missing HAS_IOMEM to the grcan
driver.
Michal Simek's patch for the xilinx driver add dev_err_probe()
support.
Arnd Bergmann's patch for the ucan driver fixes a compiler warning.
Stephane Grosjean provides 3 patches for the peak USB drivers, which
add ethtool set_phys_id and CAN one-shot mode.
Xulin Sun's patch removes a not needed return check in the m-can
driver. Torin Cooper-Bennun provides 3 patches for the m-can driver
that add rx-offload support to ensure that skbs are sent from softirq
context. Wan Jiabing's patch for the tcan4x5x driver removes a
duplicate include.
The next 6 patches are by me and target the mcp251xfd driver. They add
devcoredump support, simplify the UINC handling, and add HW timestamp
support.
The remaining 12 patches target the c_can driver. The first 6 are by
me and do generic checkpatch related cleanup work. Dario Binacchi's
patches bring some cleanups and increase the number of usable message
objects from 16 to 64.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Coexistence of CQE compression and HW PTP time-stamp:
From Aya this series improves mlx5 netdev driver to allow
both mlx5 CQE compression (RX descriptor compression, that saves on PCI
transaction) and HW time-stamp PTP to co-exists.
Prior to this series both features were mutually exclusive due to the
nature of CQE compression which reduces the size of RX descriptor for
the price of trimming some data, such as the time-stamp.
In order to allow CQE compression when PTP time stamping is enabled,
We enable it on the regular performance critical RX queues which will
service all the data path traffic that is not PTP.
PTP traffic will be re-directed to dedicated RX queues on which we will
not enable CQE compression and thus keep the time-stamp intact.
Having both features is critical for systems with low PCI BW, e.g.
Multi-Host.
The series will be adding:
1) Infrastructure to create a dedicated RX queue to service the PTP traffic
2) Flow steering plumbing to capture PTP traffic both UDP packets with
destination port 319 and L2 packets with ethertype 0x88F7
3) Steer PTP traffic to the dedicated RX queue.
4) The feature will be enabled when PTP is being configured via the
already existing PTP IOCTL when CQE compression is active, otherwise
no change to the driver flow.
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Merge tag 'mlx5-updates-2021-03-29' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2021-03-29
Coexistence of CQE compression and HW PTP time-stamp:
From Aya this series improves mlx5 netdev driver to allow
both mlx5 CQE compression (RX descriptor compression, that saves on PCI
transaction) and HW time-stamp PTP to co-exists.
Prior to this series both features were mutually exclusive due to the
nature of CQE compression which reduces the size of RX descriptor for
the price of trimming some data, such as the time-stamp.
In order to allow CQE compression when PTP time stamping is enabled,
We enable it on the regular performance critical RX queues which will
service all the data path traffic that is not PTP.
PTP traffic will be re-directed to dedicated RX queues on which we will
not enable CQE compression and thus keep the time-stamp intact.
Having both features is critical for systems with low PCI BW, e.g.
Multi-Host.
The series will be adding:
1) Infrastructure to create a dedicated RX queue to service the PTP traffic
2) Flow steering plumbing to capture PTP traffic both UDP packets with
destination port 319 and L2 packets with ethertype 0x88F7
3) Steer PTP traffic to the dedicated RX queue.
4) The feature will be enabled when PTP is being configured via the
already existing PTP IOCTL when CQE compression is active, otherwise
no change to the driver flow.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
D_CAN controller supports 16, 32, 64 or 128 message objects, comparing
to 32 on C_CAN. AM335x/AM437x Sitara processors and DRA7 SOC all
instantiate a D_CAN controller with 64 message objects, as described
in the "DCAN features" subsection of the CAN chapter of their
technical reference manuals.
The driver policy has been kept unchanged, and as in the previous
version, the first half of the message objects is used for reception
and the second for transmission.
The I/O load is increased only in the case of 64 message objects,
keeping it unchanged in the case of 32. Two 32-bit read accesses are
in fact required, which however remained at 16-bit for configurations
with 32 message objects.
Link: https://lore.kernel.org/r/20210302215435.18286-7-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
As pointed by commit c0a9f4d396 ("can: c_can: Reduce register
access") the "driver casts the 16 message objects in stone, which is
completely braindead as contemporary hardware has up to 128 message
objects".
The patch prepares the module to extend the number of message objects
beyond the 32 currently managed. This was achieved by transforming the
constants used to manage RX/TX messages into variables without
changing the driver policy.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20210302215435.18286-6-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The arbitration register is already set up with 32-bit writes in the
other parts of the code except for this point.
Link: https://lore.kernel.org/r/20210302215435.18286-5-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
After reading the commit 640916db2b ("can: c_can: Make it SMP safe")
it may sound strange to see the IF_RX interface used by the
can_inval_tx_object function. A comment was added to avoid any
misunderstanding.
Link: https://lore.kernel.org/r/20210302215435.18286-4-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Commit 9d23a9818c ("can: c_can: Remove unused inline function") left
behind C_CAN_MSG_OBJ_TX_LAST constant.
Commit fa39b54ccf ("can: c_can: Get rid of pointless interrupts") left
behind C_CAN_MSG_RX_LOW_LAST and C_CAN_MSG_OBJ_RX_SPLIT constants.
The removed code also made a comment useless and misleading.
Link: https://lore.kernel.org/r/20210302215435.18286-2-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch uses the previously added mcp251xfd_skb_set_timestamp()
function to convert the timestamp done by the CAN controller into a
proper skb hw timestamp.
Link: https://lore.kernel.org/r/20210304161209.2754463-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch add the HW timestamping infrastructure. The mcp251xfd has a
free running timer of 32 bit width, running at max 40MHz, which wraps
around every 107 seconds. The current timestamp is latched into RX and
TEF objects automatically be the CAN controller.
This patch sets up a cyclecounter, timecounter and delayed worker
infrastructure (which runs every 45 seconds) to convert the timer into
a proper 64 bit based ns timestamp.
Link: https://lore.kernel.org/r/20210304160328.2752293-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
In the patches:
| 1f652bb6ba can: mcp25xxfd: rx-path: reduce number of SPI core requests to set UINC bit
| 68c0c1c7f9 can: mcp251xfd: tef-path: reduce number of SPI core requests to set UINC bit
the setting of the UINC bit in the TEF and RX FIFO was batched into a
single SPI message consisting of several transfers. All transfers but
the last need to have the cs_change set to 1.
In the original patches the array of prepared transfers is send from
the beginning with the length depending on the number of read TEF/RX
objects. The cs_change of the last transfer is temporarily set to
0 during send.
This patch removes the modification of cs_change by preparing the last
transfer with cs_change to 0 and all other to 1. When sending the SPI
message the driver now starts with an offset into the array, so that
it always ends on the last entry in the array, which has the cs_change
set to 0.
Link: https://lore.kernel.org/r/20210304160328.2752293-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
For easier debugging this patch adds dev coredump support to the
driver. A dev coredump is generated in case the chip fails to start or
an error in the interrupt handler is detected.
The dev coredump consists of all chip registers and chip memory, as
well as the driver's internal state of the TEF-, RX- and TX-FIFOs, it
can be analyzed with the mcp251xfd-dump tool of the can-utils:
https://github.com/linux-can/can-utils/tree/master/mcp251xfd
Link: https://lore.kernel.org/r/20210304160328.2752293-2-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
linux/regmap.h has been included at line 13, so remove the duplicate
one at line 14.
Fixes: 67def4ef8b ("can: tcan4x5x: move regmap code into seperate file")
Link: https://lore.kernel.org/r/20210323021026.140460-1-wanjiabing@vivo.com
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
For peripheral devices, m_can sent skbs directly from a threaded irq
instead of from a softirq context, breaking the tcan4x5x peripheral
driver completely. This patch transitions the driver to use the
rx-offload helper for peripherals, ensuring the skbs are sent from the
correct context, with h/w timestamping to ensure correct ordering.
Link: https://lore.kernel.org/r/20210308102427.63916-4-torin@maxiluxsystems.com
Signed-off-by: Torin Cooper-Bennun <torin@maxiluxsystems.com>
[mkl: m_can_class_register(): update error handling]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This is a prerequisite for transitioning the m_can driver to rx-offload,
which works best with TX and RX timestamps.
The timestamps provided by M_CAN are 16-bit, timed according to the
nominal bit timing, and may be prescaled by a multiplier up to 16. We
choose the highest prescalar so that the timestamp wraps every 2^20 bit
times, or 209 ms at a bus speed of 5 Mbit/s. Timestamps will have a
precision of 16 bit times.
Link: https://lore.kernel.org/r/20210308102427.63916-3-torin@maxiluxsystems.com
Signed-off-by: Torin Cooper-Bennun <torin@maxiluxsystems.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Pablo Neira Ayuso
Yang Yingliang
Wan Jiabing
Richard Guy Briggs
Florian Westphal
Wong Vee Khee
Shixin Liu
David S. Miller
Andreas Roeseler
Andre Edich
Dario Binacchi
Marc Kleine-Budde
Torin Cooper-Bennun