- 17 Feb, 2020 40 commits
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Karsten Graul authored
The soft parameter of smc_lgr_terminate() is not used and obsolete. Remove it. Signed-off-by:
Karsten Graul <kgraul@linux.ibm.com> Signed-off-by:
Ursula Braun <ubraun@linux.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Karsten Graul authored
When 2 callers call smc_lgr_terminate() at the same time for the same lgr, one gets the lgr_lock and deletes the lgr from the list and releases the lock. Then the second caller gets the lock and tries to delete it again. In smc_lgr_terminate() add a check if the link group lgr is already deleted from the link group list and prevent to try to delete it a second time. And add a check if the lgr is marked as freeing, which means that a termination is already pending. Signed-off-by:
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Karsten Graul authored
smc_tx_rdma_write() is called under the send_lock and should not call smc_lgr_terminate() directly. Call smc_lgr_terminate_sched() instead which schedules a worker. Signed-off-by:
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Karsten Graul authored
smc_lgr_cleanup() is called during termination processing, there is no need to send a DELETE_LINK at that time. A DELETE_LINK should have been sent before the termination is initiated, if needed. And remove the extra call to wake_up(&lnk->wr_reg_wait) because smc_llc_link_inactive() already calls the related helper function smc_wr_wakeup_reg_wait(). Signed-off-by:
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David S. Miller authored
Ido Schimmel says: ==================== mlxsw: Reduce dependency between bridge and router code This patch set reduces the dependency between the bridge and the router code in preparation for RTNL removal from the route insertion path in mlxsw. The motivation and solution are explained in detail in patch #3. The main idea is that we need to stop special-casing the VXLAN devices with regards to the reference counting of the FIDs. Otherwise, we can bump into the situation described in patch #3, where the routing code calls into the bridge code which calls back into the routing code. After adding a mutex to protect router data structures to remove RTNL dependency, this can result in an AA deadlock. Patches #1 and #2 are preparations. They convert the FIDs to use 'refcount_t' for reference counting in order to catch over/under flows and add extack to the bridge creation function. Patches #3-#5 reduce the dependency between the bridge and the router code. First, by having the VXLAN device take a reference on the FID in patch #3 and then by removing unnecessary code following the change in patch #3. Patches #6-#10 adjust existing selftests and add new ones to exercise the new code paths. ==================== Signed-off-by: -
Ido Schimmel authored
Test that when two VXLAN tunnels with conflicting configurations (i.e., different TTL) are enslaved to the same VLAN-aware bridge, then the enslavement of a port to the bridge is denied. Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Acked-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Ido Schimmel authored
After recent changes, the VXLAN tunnel will be offloaded regardless if any local ports are member in the FID or not. Adjust the test to make sure the tunnel is offloaded in this case. Signed-off-by:
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Ido Schimmel authored
The driver supports a single VLAN-aware bridge. Test that the enslavement of a port to the second VLAN-aware bridge fails with an extack. Signed-off-by:
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Ido Schimmel authored
Test that creation of a bridge (both VLAN-aware and VLAN-unaware) fails with an extack when a VXLAN device with an unsupported configuration is already enslaved to it. Signed-off-by:
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Ido Schimmel authored
The addition of a VLAN on a bridge slave prompts the driver to have the local port in question join the FID corresponding to this VLAN. Before recent changes, the operation of joining the FID would also mean that the driver would enable VXLAN tunneling if a VXLAN device was also member in the VLAN. In case the configuration of the VXLAN tunnel was not supported, an extack error would be returned. Since the operation of joining the FID no longer means that VXLAN tunneling is potentially enabled, the test is no longer relevant. Remove it. Signed-off-by:
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Ido Schimmel authored
Commit f40be47a ("mlxsw: spectrum_router: Do not force specific configuration order") added a call from the routing code to the bridge code in order to handle the case where VNI should be set on a FID following the joining of the router port to the FID. This is no longer required, as previous patches made VXLAN devices explicitly take a reference on the FID and set VNI on it. Therefore, remove the unnecessary call and simply have the RIF take a reference on the FID without checking if VNI should also be set on it. Signed-off-by:
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Ido Schimmel authored
As explained in previous patch, VXLAN devices now take a reference on the FID and not only local ports. Therefore, there is no need for local ports to check if they need to set a VNI on the FID when they join the FID. Remove these unnecessary checks. Signed-off-by:
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Ido Schimmel authored
Up until now only local ports and the router port (which is also a local port) took a reference on the corresponding FID (Filtering Identifier) when joining a bridge. For example: 192.0.2.1/24 br0 | +------+------+ | | swp1 vxlan0 In this case the reference count of the FID will be '2'. Since the VXLAN device does not take a reference on the FID, whenever a local port joins the bridge it needs to check if a VXLAN device is already enslaved. If the VXLAN device should be mapped to the FID in question, then the VXLAN device's VNI is set on the FID. Beside the fact that this scheme special-cases the VXLAN device, it also creates an unnecessary dependency between the routing and bridge code: 1. [R] IP address is added on 'br0', which prompts the creation of a RIF and a backing FID 2. [B] VNI is enabled on backing FID 3. [R] Host route corresponding to VXLAN device's source address is promoted to perform NVE decapsulation [R] - Routing code [B] - Bridge code This back and forth dependency will become problematic when a lock is added in the routing code instead of relying on RTNL, as it will result in an AA deadlock. Instead, have the VXLAN device take a reference on the FID just like all the other netdev members of the bridge. In order to correctly handle the case where VXLAN devices are already enslaved to the bridge when it is offloaded, walk the bridge's slaves and replay the configuration. Signed-off-by:Petr Machata <petrm@mellanox.com> Signed-off-by:
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Ido Schimmel authored
Propagate extack to bridge creation function so that error messages could be passed to user space via netlink instead of printing them to kernel log. A subsequent patch will pass the new extack argument to more functions. Signed-off-by:
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Ido Schimmel authored
'refcount_t' is very useful for catching over/under flows. Convert the FID (Filtering Identifier) objects to use it instead of 'unsigned int' for their reference count. A subsequent patch in the series will change the way VXLAN devices hold / release the FID reference, which is why the conversion is made now. Signed-off-by:
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Julian Wiedmann authored
This enables ndo_dflt_bridge_getlink() to report a bridge port's offload settings for multicast and broadcast flooding. CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by:
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David S. Miller authored
Edward Cree says: ==================== couple more ARFS tidy-ups Tie up some loose ends from the recent ARFS work. ==================== Signed-off-by: -
Edward Cree authored
efx_filter_rfs_expire() is a work-function, so it being inline makes no sense. It's only ever used in efx_channels.c, so move it there. While we're at it, clean out some related unused cruft. Signed-off-by:
Edward Cree <ecree@solarflare.com> Signed-off-by:
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Edward Cree authored
Prevent excessive CPU time spent running a workitem with nothing to do. We avoid any races by keeping the same check in efx_filter_rfs_expire(). Suggested-by:
Martin Habets <mhabets@solarflare.com> Signed-off-by:
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Julian Wiedmann authored
When a real dev unregisters, vlan_device_event() also unregisters all of its vlan interfaces. For each VID this ends up in __vlan_vid_del(), which attempts to remove the VID from the real dev's VLAN filter. But the unregistering real dev might no longer be able to issue the required IOs, and return an error. Subsequently we raise a noisy warning msg that is not appropriate for this situation: the real dev is being torn down anyway, there shouldn't be any worry about cleanly releasing all of its HW-internal resources. So to avoid scaring innocent users, suppress this warning when the failed deletion happens on an unregistering device. While at it also convert the raw pr_warn() to a more fitting netdev_warn(). Signed-off-by:
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Andy Shevchenko authored
Since PCI core provides a generic PCI_DEVICE_DATA() macro, replace STMMAC_DEVICE() with former one. No functional change intended. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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David S. Miller authored
Vlad Buslov says: ==================== Remove rtnl lock dependency from flow_action infra Currently, TC flow_action infrastructure code obtain rtnl lock before accessing action state in tc_setup_flow_action() function and releases it afterwards. This behavior is not supposed to impact TC filter insertion rate because filling flow_action representation is only a small part of creating new filter and expensive operations (hardware offload callbacks, classifiers, cls API code that creates chains and classifiers instances) already support unlocked execution. However, typical vswitch implementation might need to also dump TC filters concurrently, for example to age out unused flows or update flow counters. TC dump is fully serialized and holds rtnl lock during its whole execution in kernel space. As such, it can significantly impact concurrent tasks that try to intermittently obtain rtnl lock when filling intermediate representation for new filter offload (performance evaluation at the end of this mail). Refactor flow_action cls API infrastructure and its dependencies to not rely on rtnl lock for synchronization. Patch set overview: - Refactor tc_setup_flow_action() to obtain action tcf_lock when accessing action state. Fix its dependencies to not obtain tcf_lock themselves and assume that caller already holds it (needs to be done in same patch to prevent deadlock) and not to call sleeping functions (needs to be done in same patch to prevent "sleeping while atomic" dmesg warnings). - Refactor action helper functions to require tcf_lock instead of rtnl. Internally, all of the actions already use tcf_lock for synchronization to accommodate unlocked classifier API, so this change relies on already existing functionality. - Remove rtnl lock and "rtnl_held" argument from tc_setup_flow_action() function. To test the change, multiple concurrent TC instances are invoked with following command: time ls add* | xargs -n 1 -P 100 sudo tc -b Ten batch files with following typical rules (100k each) are used: filter add dev ens1f0_0 protocol ip ingress prio 1 handle 1 flower src_mac e4:11:0:0:0:0 dst_mac e4:12:0:0:0:0 src_ip 192.168.111.1 dst_ip 192.168.111.2 ip_proto udp dst_port 1 src_port 1 action tunnel_key set id 1 src_ip 2.2.2.2 dst_ip 2.2.2.3 dst_port 4789 no_percpu action mirred egress redirect dev vxlan1 no_percpu TC dump of same device is called in infinite loop from five concurrent instances: while true do tc -s filter show dev $NIC ingress >/dev/null done Results obtained on current net-next commit 9f68e365 ("Merge tag 'drm-next-2020-01-30' of git://anongit.freedesktop.org/drm/drm"): | net-next | this change ---------------+----------+------------- TC add | 6.3s | 6.3s TC add + dump | 29.3s | 6.8s Test results confirm significant impact of concurrent TC dump. The impact is almost fully mitigated by proposed change (differences can be attributed to contention for chain and tp locks between add and dump TC instances). ==================== Signed-off-by:
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Vlad Buslov authored
Refactor tc_setup_flow_action() function not to use rtnl lock and remove 'rtnl_held' argument that is no longer needed. Signed-off-by:
Vlad Buslov <vladbu@mellanox.com> Acked-by:
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Vlad Buslov authored
In order to remove rtnl lock dependency from flow_action representation translator, change rtnl_dereference() to rcu_dereference_protected() in ct action helpers that provide external access to zone and action values. This is safe to do because the functions are not called from anywhere else outside flow_action infrastructure which was modified to obtain tcf_lock when accessing action data in one of previous patches in the series. Signed-off-by:
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Vlad Buslov authored
In order to remove rtnl lock dependency from flow_action representation translator, change rcu_dereference_bh_rtnl() to rcu_dereference_protected() in police action helpers that provide external access to rate and burst values. This is safe to do because the functions are not called from anywhere else outside flow_action infrastructure which was modified to obtain tcf_lock when accessing action data in one of previous patches in the series. Signed-off-by:
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Vlad Buslov authored
In order to remove dependency on rtnl lock, take action's tcfa_lock when constructing its representation as flow_action_entry structure. Refactor tcf_sample_get_group() to assume that caller holds tcf_lock and don't take it manually. This callback is only called from flow_action infra representation translator which now calls it with tcf_lock held, so this refactoring is necessary to prevent deadlock. Allocate memory with GFP_ATOMIC flag for ip_tunnel_info copy because tcf_tunnel_info_copy() is only called from flow_action representation infra code with tcf_lock spinlock taken. Signed-off-by:
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David S. Miller authored
Lorenzo Bianconi says: ==================== add xdp ethtool stats to mvneta driver Rework mvneta stats accounting in order to introduce xdp ethtool statistics in the mvneta driver. Introduce xdp_redirect, xdp_pass, xdp_drop and xdp_tx counters to ethtool statistics. Fix skb_alloc_error and refill_error ethtool accounting ==================== Signed-off-by: -
Lorenzo Bianconi authored
Get rid of xdp_ret in mvneta_swbm_rx_frame routine since now we can rely on xdp_stats to flush in case of xdp_redirect Signed-off-by:
Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by:
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Lorenzo Bianconi authored
Add xdp_redirect, xdp_pass, xdp_drop and xdp_tx counters to ethtool statistics Signed-off-by:
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Lorenzo Bianconi authored
Introduce mvneta_stats structure in mvneta_update_stats routine signature in order to collect all the rx stats and update them at the end at the napi loop. mvneta_stats will be reused adding xdp statistics support to ethtool. Signed-off-by:
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Lorenzo Bianconi authored
In oreder to avoid unnecessary instructions rely on open-coding updating per-cpu stats in mvneta_tx/mvneta_xdp_submit_frame and mvneta_rx_hwbm routines. This patch will be used to add xdp support to ethtool for the mvneta driver Signed-off-by:
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Lorenzo Bianconi authored
mvneta_ethtool_update_stats routine is currently reporting skb_alloc_error and refill_error only for the first rx queue. Fix the issue moving skb_alloc_err and refill_err in mvneta_pcpu_stats structure. Moreover this patch will be used to introduce xdp statistics to ethtool for the mvneta driver Fixes: 17a96da6 ("net: mvneta: discriminate error cause for missed packet") Signed-off-by:
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David S. Miller authored
Andrew Lunn says: ==================== mv88e6xxx: Add SERDES/PCS registers to ethtool -d ethtool -d will dump the registers of an interface. For mv88e6xxx switch ports, this dump covers the port specific registers. Extend this with the SERDES/PCS registers, if a port has a SERDES. ==================== Signed-off-by: -
Andrew Lunn authored
The mv88e6390 has upto 8 sets of PCS registers, depending on how ports 9 and 10 are configured. The can be spread over 8 ports. If a port has a PCS register set, return it along with the port registers. The register space is sparse, so hard code a list of registers which will be returned. It can later be extended, if needed, by append to the end of the list. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
The mv88e6352 has one PCS which can be used for 1000BaseX or SGMII. Add the registers to the dump for the port which the PCS is associated to. Signed-off-by:
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Andrew Lunn authored
ethtool provides a generic mechanism for a driver to return the registers of an ethernet device. DSA uses this to give the port registers associated with an interfaces. Extend this to allow PCS registers to also be returned, if the port has a PCS associated to it. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Jeff Kirsher says: ==================== 100GbE Intel Wired LAN Driver Updates 2020-02-15 This series contains updates to ice driver only. Brett adds support for "Queue in Queue" (QinQ) support, by supporting S-tag & C-tag VLAN traffic by disabling pruning when there are no 0x8100 VLAN interfaces currently on top of the PF. Also refactored the port VLAN configuration to re-use the common code for enabling and disabling a port VLAN in single function. Added a helper function to determine if the VF link is up. Fixed how the port VLAN configures the priority bits for a VF interface. Fixed the port VLAN to only see its own broadcast and multicast traffic. Added support to enable and disable all receive queues, by refactoring adding a new function to do the necessary steps to enable/disable a queue with the necessary read flush. Fixed how we set the mapping mode for transmit and receive queues. Added support for VF queues to handle LAN overflow events. Fixed and refactored how receive queues get disabled for VFs, which was being handled one queue at at time, so improve it to handle when the VF is requesting more than one queue to be disabled. Fixed how the virtchnl_queue_select bitmap is validated. Finally a patch not authored by Brett, Bruce cleans up "fallthrough" comments which are unnecessary. Also replaces the "fallthough" comments with the GCC reserved word fallthrough, along with other GCC compiler fixes. Add missing function header comment regarding a function argument that was missing. ==================== Signed-off-by: -
David S. Miller authored
Finn Thain says: ==================== Improvements for SONIC ethernet drivers Now that the necessary sonic driver fixes have been merged, and the merge window has closed again, I'm sending the remainder of my sonic driver patch queue. A couple of these patches will have to be applied in sequence to avoid 'git am' rejects. The others are independent and could have been submitted individually. Please let me know if I should do that. The complete sonic driver patch queue was tested on National Semiconductor hardware (macsonic), qemu-system-m68k (macsonic) and qemu-system-mips64el (jazzsonic). ==================== Signed-off-by: -
Finn Thain authored
On m68k, local irqs remain enabled while interrupt handlers execute. Therefore the macsonic driver has had to disable interrupts to avoid re-entering sonic_interrupt(). As of commit 865ad2f2 ("net/sonic: Add mutual exclusion for accessing shared state"), sonic_interrupt() became re-entrant, and its wrapper became redundant. Tested-by:
Stan Johnson <userm57@yahoo.com> Signed-off-by:
Finn Thain <fthain@telegraphics.com.au> Signed-off-by:
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Finn Thain authored
Give the transmit command as soon as the transmit descriptor is ready. Tested-by:
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