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2022-05-31net/ipv6: Expand and rename accept_unsolicited_na to accept_untracked_naArun Ajith S
RFC 9131 changes default behaviour of handling RX of NA messages when the corresponding entry is absent in the neighbour cache. The current implementation is limited to accept just unsolicited NAs. However, the RFC is more generic where it also accepts solicited NAs. Both types should result in adding a STALE entry for this case. Expand accept_untracked_na behaviour to also accept solicited NAs to be compliant with the RFC and rename the sysctl knob to accept_untracked_na. Fixes: f9a2fb73318e ("net/ipv6: Introduce accept_unsolicited_na knob to implement router-side changes for RFC9131") Signed-off-by: Arun Ajith S <aajith@arista.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20220530101414.65439-1-aajith@arista.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-05-23eth: de4x5: remove support for Generic DECchip & DIGITAL EtherWORKS PCI/EISAJakub Kicinski
Looks like almost all changes to this driver had been tree-wide refactoring since git era begun. There is one commit from Al 15 years ago which could potentially be fixing a real bug. The driver is using virt_to_bus() and is a real magnet for pointless cleanups. It seems unlikely to have real users. Let's try to shed this maintenance burden. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-19docs: change the title of networking docsJakub Kicinski
The current title of our section of the documentation is Linux Networking Documentation. Since we're describing a section of Linux Documentation repeating those two words seems redundant. Link: https://lore.kernel.org/r/20220518234346.2088436-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-16docs: ctucanfd: Use 'kernel-figure' directive instead of 'figure'Akira Yokosawa
Two issues were observed in the ReST doc added by commit c3a0addefbde ("docs: ctucanfd: CTU CAN FD open-source IP core documentation.") with Sphinx versions 2.4.4 and 4.5.0. The plain "figure" directive broke "make pdfdocs" due to a missing PDF figure. For conversion of SVG -> PDF to work, the "kernel-figure" directive, which is an extension for kernel documentation, should be used instead. The directive of "code:: raw" causes a warning from both "make htmldocs" and "make pdfdocs", which reads: [...]/can/ctu/ctucanfd-driver.rst:75: WARNING: Pygments lexer name 'raw' is not known A plain literal-block marker should suffice where no syntax highlighting is intended. Fix the issues by using suitable directive and marker. Fixes: c3a0addefbde ("docs: ctucanfd: CTU CAN FD open-source IP core documentation.") Link: https://lore.kernel.org/all/5986752a-1c2a-5d64-f91d-58b1e6decd17@gmail.com Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Cc: Martin Jerabek <martin.jerabek01@gmail.com> Cc: Ondrej Ille <ondrej.ille@gmail.com> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2022-05-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next This is v2 including deadlock fix in conntrack ecache rework reported by Jakub Kicinski. The following patchset contains Netfilter updates for net-next, mostly updates to conntrack from Florian Westphal. 1) Add a dedicated list for conntrack event redelivery. 2) Include event redelivery list in conntrack dumps of dying type. 3) Remove per-cpu dying list for event redelivery, not used anymore. 4) Add netns .pre_exit to cttimeout to zap timeout objects before synchronize_rcu() call. 5) Remove nf_ct_unconfirmed_destroy. 6) Add generation id for conntrack extensions for conntrack timeout and helpers. 7) Detach timeout policy from conntrack on cttimeout module removal. 8) Remove __nf_ct_unconfirmed_destroy. 9) Remove unconfirmed list. 10) Remove unconditional local_bh_disable in init_conntrack(). 11) Consolidate conntrack iterator nf_ct_iterate_cleanup(). 12) Detect if ctnetlink listeners exist to short-circuit event path early. 13) Un-inline nf_ct_ecache_ext_add(). 14) Add nf_conntrack_events autodetect ctnetlink listener mode and make it default. 15) Add nf_ct_ecache_exist() to check for event cache extension. 16) Extend flowtable reverse route lookup to include source, iif, tos and mark, from Sven Auhagen. 17) Do not verify zero checksum UDP packets in nf_reject, from Kevin Mitchell. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-13netfilter: conntrack: add nf_conntrack_events autodetect modeFlorian Westphal
This adds the new nf_conntrack_events=2 mode and makes it the default. This leverages the earlier flag in struct net to allow to avoid the event extension as long as no event listener is active in the namespace. This avoids, for most cases, allocation of ct->ext area. A followup patch will take further advantage of this by avoiding calls down into the event framework if the extension isn't present. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-05-11net: appletalk: remove Apple/Farallon LocalTalk PC supportJakub Kicinski
Looks like all the changes to this driver had been tree-wide refactoring since git era begun. The driver is using virt_to_bus() we should make it use more modern DMA APIs but since it's unlikely to be getting any use these days delete it instead. We can always revert to bring it back. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-10skbuff: render the checksum comment to documentationJakub Kicinski
Long time ago Tom added a giant comment to skbuff.h explaining checksums. Now that we have a place in Documentation for skbuff docs we should render it. Sprinkle some markup while at it. Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-10skbuff: rewrite the doc for data-only skbsJakub Kicinski
The comment about shinfo->dataref split is really unhelpful, at least to me. Rewrite it and render it to skb documentation. Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-10skbuff: add a basic intro docJakub Kicinski
Add basic skb documentation. It's mostly an intro to the subsequent patches - it would looks strange if we documented advanced topics without covering the basics in any way. Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-09net: wwan: t7xx: Add maintainers and documentationRicardo Martinez
Adds maintainers and documentation for MediaTek t7xx 5G WWAN modem device driver. Signed-off-by: Ricardo Martinez <ricardo.martinez@linux.intel.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-05Revert "Merge branch 'mlxsw-line-card-model'"Jakub Kicinski
This reverts commit 5e927a9f4b9f29d78a7c7d66ea717bb5c8bbad8e, reversing changes made to cfc1d91a7d78cf9de25b043d81efcc16966d55b3. The discussion is still ongoing so let's remove the uAPI until the discussion settles. Link: https://lore.kernel.org/all/20220425090021.32e9a98f@kernel.org/ Reviewed-by: Ido Schimmel <idosch@nvidia.com> Link: https://lore.kernel.org/r/20220504154037.539442-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-02docs: networking: device drivers: can: ctucanfd: update author e-mailPavel Pisa
This patch updates the author's email address. Link: https://lore.kernel.org/all/e4396244da6b008c671def9f50bb983a10389863.1650816929.git.pisa@cmp.felk.cvut.cz Cc: Odrej Ille <ondrej.ille@gmail.com> Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> [mkl: split into separate patches] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2022-05-02docs: networking: device drivers: can: add ctucanfd to indexPavel Pisa
This patch adds the ctucanfd-driver document to the index. Link: https://lore.kernel.org/all/e4396244da6b008c671def9f50bb983a10389863.1650816929.git.pisa@cmp.felk.cvut.cz Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> [mkl: split into separate patches] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2022-04-29mptcp: Add a per-namespace sysctl to set the default path manager typeMat Martineau
The new net.mptcp.pm_type sysctl determines which path manager will be used by each newly-created MPTCP socket. v2: Handle builds without CONFIG_SYSCTL v3: Clarify logic for type-specific PM init (Geliang Tang and Paolo Abeni) Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-27net: wan: remove support for Z85230-based devicesJakub Kicinski
Looks like all the changes to this driver had been automated churn since git era begun. The driver is using virt_to_bus(), it's just a maintenance burden unlikely to have any users. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-25mlxsw: core_linecards: Expose device FW version over device infoJiri Pirko
Extend MDDQ to obtain FW version of line card device and implement device_info_get() op to fill up the info with that. Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-25mlxsw: core_linecards: Expose HW revision and INI versionJiri Pirko
Implement info_get() to expose HW revision of a linecard and loaded INI version. Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-25devlink: introduce line card device info infrastructureJiri Pirko
Extend the line card info message with information (e.g., FW version) about devices found on the line card. Example: $ devlink lc info pci/0000:01:00.0 lc 8 pci/0000:01:00.0: lc 8 versions: fixed: hw.revision 0 running: ini.version 4 devices: device 0 versions: running: fw 19.2010.1310 device 1 versions: running: fw 19.2010.1310 device 2 versions: running: fw 19.2010.1310 device 3 versions: running: fw 19.2010.1310 Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-25devlink: introduce line card info get messageJiri Pirko
Allow the driver to provide per line card info get op to fill-up info, similar to the "devlink dev info". Example: $ devlink lc info pci/0000:01:00.0 lc 8 pci/0000:01:00.0: lc 8 versions: fixed: hw.revision 0 running: ini.version 4 Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netPaolo Abeni
drivers/net/ethernet/microchip/lan966x/lan966x_main.c d08ed852560e ("net: lan966x: Make sure to release ptp interrupt") c8349639324a ("net: lan966x: Add FDMA functionality") Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-04-20doc/ip-sysctl: add bc_forwardingNicolas Dichtel
Let's describe this sysctl. Fixes: 5cbf777cfdf6 ("route: add support for directed broadcast forwarding") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-19docs: ctucanfd: CTU CAN FD open-source IP core documentation.Pavel Pisa
CTU CAN FD IP core documentation based on Martin Jeřábek's diploma theses Open-source and Open-hardware CAN FD Protocol Support https://dspace.cvut.cz/handle/10467/80366 . Link: https://lore.kernel.org/all/692b965999ff6c272239df0fe1c76b68d02b134d.1647932262.git.pisa@cmp.felk.cvut.cz Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Martin Jerabek <martin.jerabek01@gmail.com> Signed-off-by: Ondrej Ille <ondrej.ille@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2022-04-18docs: net: dsa: describe issues with checksum offloadLuiz Angelo Daros de Luca
DSA tags before IP header (categories 1 and 2) or after the payload (3) might introduce offload checksum issues. Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-18devlink: implement line card active stateJiri Pirko
Allow driver to mark a line card as active. Expose this state to the userspace over devlink netlink interface with proper notifications. 'active' state means that line card was plugged in after being provisioned. Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-18devlink: implement line card provisioningJiri Pirko
In order to be able to configure all needed stuff on a port/netdevice of a line card without the line card being present, introduce line card provisioning. Basically by setting a type, provisioning process will start and driver is supposed to create a placeholder for instances (ports/netdevices) for a line card type. Allow the user to query the supported line card types over line card get command. Then implement two netlink command SET to allow user to set/unset the card type. On the driver API side, add provision/unprovision ops and supported types array to be advertised. Upon provision op call, the driver should take care of creating the instances for the particular line card type. Introduce provision_set/clear() functions to be called by the driver once the provisioning/unprovisioning is done on its side. These helpers are not to be called directly due to the async nature of provisioning. Example: $ devlink port # No ports are listed $ devlink lc pci/0000:01:00.0: lc 1 state unprovisioned supported_types: 16x100G lc 2 state unprovisioned supported_types: 16x100G lc 3 state unprovisioned supported_types: 16x100G lc 4 state unprovisioned supported_types: 16x100G lc 5 state unprovisioned supported_types: 16x100G lc 6 state unprovisioned supported_types: 16x100G lc 7 state unprovisioned supported_types: 16x100G lc 8 state unprovisioned supported_types: 16x100G $ devlink lc set pci/0000:01:00.0 lc 8 type 16x100G $ devlink lc show pci/0000:01:00.0 lc 8 pci/0000:01:00.0: lc 8 state active type 16x100G supported_types: 16x100G $ devlink port pci/0000:01:00.0/0: type notset flavour cpu port 0 splittable false pci/0000:01:00.0/53: type eth netdev enp1s0nl8p1 flavour physical lc 8 port 1 splittable true lanes 4 pci/0000:01:00.0/54: type eth netdev enp1s0nl8p2 flavour physical lc 8 port 2 splittable true lanes 4 pci/0000:01:00.0/55: type eth netdev enp1s0nl8p3 flavour physical lc 8 port 3 splittable true lanes 4 pci/0000:01:00.0/56: type eth netdev enp1s0nl8p4 flavour physical lc 8 port 4 splittable true lanes 4 pci/0000:01:00.0/57: type eth netdev enp1s0nl8p5 flavour physical lc 8 port 5 splittable true lanes 4 pci/0000:01:00.0/58: type eth netdev enp1s0nl8p6 flavour physical lc 8 port 6 splittable true lanes 4 pci/0000:01:00.0/59: type eth netdev enp1s0nl8p7 flavour physical lc 8 port 7 splittable true lanes 4 pci/0000:01:00.0/60: type eth netdev enp1s0nl8p8 flavour physical lc 8 port 8 splittable true lanes 4 pci/0000:01:00.0/61: type eth netdev enp1s0nl8p9 flavour physical lc 8 port 9 splittable true lanes 4 pci/0000:01:00.0/62: type eth netdev enp1s0nl8p10 flavour physical lc 8 port 10 splittable true lanes 4 pci/0000:01:00.0/63: type eth netdev enp1s0nl8p11 flavour physical lc 8 port 11 splittable true lanes 4 pci/0000:01:00.0/64: type eth netdev enp1s0nl8p12 flavour physical lc 8 port 12 splittable true lanes 4 pci/0000:01:00.0/125: type eth netdev enp1s0nl8p13 flavour physical lc 8 port 13 splittable true lanes 4 pci/0000:01:00.0/126: type eth netdev enp1s0nl8p14 flavour physical lc 8 port 14 splittable true lanes 4 pci/0000:01:00.0/127: type eth netdev enp1s0nl8p15 flavour physical lc 8 port 15 splittable true lanes 4 pci/0000:01:00.0/128: type eth netdev enp1s0nl8p16 flavour physical lc 8 port 16 splittable true lanes 4 $ devlink lc set pci/0000:01:00.0 lc 8 notype Signed-off-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-17net/ipv6: Introduce accept_unsolicited_na knob to implement router-side ↵Arun Ajith S
changes for RFC9131 Add a new neighbour cache entry in STALE state for routers on receiving an unsolicited (gratuitous) neighbour advertisement with target link-layer-address option specified. This is similar to the arp_accept configuration for IPv4. A new sysctl endpoint is created to turn on this behaviour: /proc/sys/net/ipv6/conf/interface/accept_unsolicited_na. Signed-off-by: Arun Ajith S <aajith@arista.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-15net: ethtool: extend ringparam set/get APIs for tx_pushJie Wang
Currently tx push is a standard driver feature which controls use of a fast path descriptor push. So this patch extends the ringparam APIs and data structures to support set/get tx push by ethtool -G/g. Signed-off-by: Jie Wang <wangjie125@huawei.com> Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netPaolo Abeni
2022-04-13octeon_ep: Add driver framework and device initializationVeerasenareddy Burru
Add driver framework and device setup and initialization for Octeon PCI Endpoint NIC. Add implementation to load module, initilaize, register network device, cleanup and unload module. Signed-off-by: Veerasenareddy Burru <vburru@marvell.com> Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com> Signed-off-by: Satananda Burla <sburla@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-08bonding: Update layer2 and layer2+3 hash formula documentationGal Pressman
When using layer2 or layer2+3 hash, only the 5th byte of the MAC addresses is used. Signed-off-by: Gal Pressman <gal@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-03docs: net: dsa: fix minor grammar and punctuation issuesBjorn Helgaas
Fix a few typos and minor grammatical issues. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-03-31docs: netdev: move the netdev-FAQ to the process pagesJakub Kicinski
The documentation for the tip tree is really in quite a similar spirit to the netdev-FAQ. Move the netdev-FAQ to the process docs as well. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: broaden the new vs old code formatting guidelinesJakub Kicinski
Convert the "should I use new or old comment formatting" to cover all formatting. This makes the question itself shorter. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: call out the merge window in tag checkingJakub Kicinski
Add the most important case to the question about "where are we in the cycle" - the case of net-next being closed. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: add missing back ticksJakub Kicinski
I think double back ticks are more correct. Add where they are missing. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: make the testing requirement more stringentJakub Kicinski
These days we often ask for selftests so let's update our testing requirements. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: add a question about re-posting frequencyJakub Kicinski
We have to tell people to stop reposting to often lately, or not to repost while the discussion is ongoing. Document this. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: rephrase the 'should I update patchwork' questionJakub Kicinski
Make the question shorter and adjust the start of the answer accordingly. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: rephrase the 'Under review' questionJakub Kicinski
The semantics of "Under review" have shifted. Reword the question about it a bit and focus it on the response time. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: shorten the name and mention msgid for patch statusJakub Kicinski
Cut down the length of the question so it renders better in docs. Mention that Message-ID can be used to search patchwork. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: note that RFC postings are allowed any timeJakub Kicinski
Document that RFCs are allowed during the merge window. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: turn the net-next closed into a WarningJakub Kicinski
Use the sphinx Warning box to make the net-next being closed stand out more. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: move the patch marking section upJakub Kicinski
We want people to mark their patches with net and net-next in the subject. Many miss doing that. Move the FAQ section which points that out up, and place it after the section which enumerates the trees, that seems like a pretty logical place for it. Since the two sections are together we can remove a little bit (not too much) of the repetition. v2: also remove the text for non-git setups, we want people to use git. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: minor rewordJakub Kicinski
that -> those Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-31docs: netdev: replace references to old archivesJakub Kicinski
Most people use (or should use) lore at this point. Replace the pointers to older archiving systems. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-16devlink: expose instance locking and add locked port registeringJakub Kicinski
It should be familiar and beneficial to expose devlink instance lock to the drivers. This way drivers can block devlink from calling them during critical sections without breakneck locking. Add port helpers, port splitting callbacks will be the first target. Use 'devl_' prefix for "explicitly locked" API. Initial RFC used '__devlink' but that's too much typing. devl_lock_is_held() is not defined without lockdep, which is the same behavior as lockdep_is_held() itself. Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-03-09tcp: adjust TSO packet sizes based on min_rttEric Dumazet
Back when tcp_tso_autosize() and TCP pacing were introduced, our focus was really to reduce burst sizes for long distance flows. The simple heuristic of using sk_pacing_rate/1024 has worked well, but can lead to too small packets for hosts in the same rack/cluster, when thousands of flows compete for the bottleneck. Neal Cardwell had the idea of making the TSO burst size a function of both sk_pacing_rate and tcp_min_rtt() Indeed, for local flows, sending bigger bursts is better to reduce cpu costs, as occasional losses can be repaired quite fast. This patch is based on Neal Cardwell implementation done more than two years ago. bbr is adjusting max_pacing_rate based on measured bandwidth, while cubic would over estimate max_pacing_rate. /proc/sys/net/ipv4/tcp_tso_rtt_log can be used to tune or disable this new feature, in logarithmic steps. Tested: 100Gbit NIC, two hosts in the same rack, 4K MTU. 600 flows rate-limited to 20000000 bytes per second. Before patch: (TSO sizes would be limited to 20000000/1024/4096 -> 4 segments per TSO) ~# echo 0 >/proc/sys/net/ipv4/tcp_tso_rtt_log ~# nstat -n;perf stat ./super_netperf 600 -H otrv6 -l 20 -- -K dctcp -q 20000000;nstat|egrep "TcpInSegs|TcpOutSegs|TcpRetransSegs|Delivered" 96005 Performance counter stats for './super_netperf 600 -H otrv6 -l 20 -- -K dctcp -q 20000000': 65,945.29 msec task-clock # 2.845 CPUs utilized 1,314,632 context-switches # 19935.279 M/sec 5,292 cpu-migrations # 80.249 M/sec 940,641 page-faults # 14264.023 M/sec 201,117,030,926 cycles # 3049769.216 GHz (83.45%) 17,699,435,405 stalled-cycles-frontend # 8.80% frontend cycles idle (83.48%) 136,584,015,071 stalled-cycles-backend # 67.91% backend cycles idle (83.44%) 53,809,530,436 instructions # 0.27 insn per cycle # 2.54 stalled cycles per insn (83.36%) 9,062,315,523 branches # 137422329.563 M/sec (83.22%) 153,008,621 branch-misses # 1.69% of all branches (83.32%) 23.182970846 seconds time elapsed TcpInSegs 15648792 0.0 TcpOutSegs 58659110 0.0 # Average of 3.7 4K segments per TSO packet TcpExtTCPDelivered 58654791 0.0 TcpExtTCPDeliveredCE 19 0.0 After patch: ~# echo 9 >/proc/sys/net/ipv4/tcp_tso_rtt_log ~# nstat -n;perf stat ./super_netperf 600 -H otrv6 -l 20 -- -K dctcp -q 20000000;nstat|egrep "TcpInSegs|TcpOutSegs|TcpRetransSegs|Delivered" 96046 Performance counter stats for './super_netperf 600 -H otrv6 -l 20 -- -K dctcp -q 20000000': 48,982.58 msec task-clock # 2.104 CPUs utilized 186,014 context-switches # 3797.599 M/sec 3,109 cpu-migrations # 63.472 M/sec 941,180 page-faults # 19214.814 M/sec 153,459,763,868 cycles # 3132982.807 GHz (83.56%) 12,069,861,356 stalled-cycles-frontend # 7.87% frontend cycles idle (83.32%) 120,485,917,953 stalled-cycles-backend # 78.51% backend cycles idle (83.24%) 36,803,672,106 instructions # 0.24 insn per cycle # 3.27 stalled cycles per insn (83.18%) 5,947,266,275 branches # 121417383.427 M/sec (83.64%) 87,984,616 branch-misses # 1.48% of all branches (83.43%) 23.281200256 seconds time elapsed TcpInSegs 1434706 0.0 TcpOutSegs 58883378 0.0 # Average of 41 4K segments per TSO packet TcpExtTCPDelivered 58878971 0.0 TcpExtTCPDeliveredCE 9664 0.0 Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Neal Cardwell <ncardwell@google.com> Link: https://lore.kernel.org/r/20220309015757.2532973-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-03-04docs: networking: Use netif_rx().Sebastian Andrzej Siewior
Since commit baebdf48c3600 ("net: dev: Makes sure netif_rx() can be invoked in any context.") the function netif_rx() can be used in preemptible/thread context as well as in interrupt context. Use netif_rx(). Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-03-03net/smc: fix document build WARNING from smc-sysctl.rstDust Li
Stephen reported the following warning messages from smc-sysctl.rst Documentation/networking/smc-sysctl.rst:3: WARNING: Title overline too short. Documentation/networking/smc-sysctl.rst: WARNING: document isn't included in any toctree Fix the title overline and add smc-sysctl entry into Documentation/networking/index.rst Fixes: 12bbb0d163a9 ("net/smc: add sysctl for autocorking") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Dust Li <dust.li@linux.alibaba.com> Link: https://lore.kernel.org/r/20220303113527.62047-1-dust.li@linux.alibaba.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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