- 23 Jul, 2018 8 commits
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Stefan Raspl authored
The functions to read and write cursors are exclusively used to copy cursors. Therefore switch to a respective function instead. Signed-off-by:
Stefan Raspl <raspl@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
Rename field diag_fallback into diag_mode and set the smc mode of a connection explicitly. Signed-off-by:
Karsten Graul <kgraul@linux.ibm.com> Signed-off-by:
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Petr Machata authored
Support for device-only IPv6 multipath next hops was dropped in commit 33bd5ac5 ("net/ipv6: Revert attempt to simplify route replace and append") and as of commit b5d2d75e ("net/ipv6: Do not allow device only routes via the multipath API"), attempts to add a next hop like that yield an explicit diagnostic. Correspondingly, drop the IPv6 parts of GRE multipath test that are supposed to test that code. Signed-off-by:
Petr Machata <petrm@mellanox.com> Reviewed-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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YueHaibing authored
Replace calls to kmalloc followed by a memcpy with a direct call to kmemdup. Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Signed-off-by:
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David S. Miller authored
Nikolay Aleksandrov says: ==================== net: bridge: add support for backup port This set introduces a new bridge port option that allows any port to have any other port (in the same bridge of course) as its backup and traffic will be forwarded to the backup port when the primary goes down. This is mainly used in MLAG and EVPN setups where we have peerlink path which is a backup of many (or even all) ports and is a participating bridge port itself. There's more detailed information in patch 02. Patch 01 just prepares the port sysfs code for options that take raw value. The main issues that this set solves are scalability and fallback latency. We have used similar code for over 6 months now to bring the fallback latency of the backup peerlink down and avoid fdb notification storms. Also due to the nature of master devices such setup is currently not possible, and last but not least having tens of thousands of fdbs require thousands of calls to switch. I've also CCed our MLAG experts that have been using similar option. Roopa also adds: "Two switches acting in a MLAG pair are connected by the peerlink interface which is a bridge port. the config on one of the switches looks like the below. The other switch also has a similar config. eth0 is connected to one port on the server. And the server is connected to both switches. br0 -- team0---eth0 | -- switch-peerlink switch-peerlink becomes the failover/backport port when say team0 to the server goes down. Today, when team0 goes down, control plane has to withdraw all the fdb entries pointing to team0 and re-install the fdb entries pointing to switch-peerlink...and restore the fdb entries when team0 comes back up again. and this is the problem we are trying to solve. This also becomes necessary when multihoming is implemented by a standard like E-VPN https://tools.ietf.org/html/rfc8365#section-8 where the 'switch-peerlink' is an overlay vxlan port (like nikolay mentions in his patch commit). In these implementations, the fdb scale can be much larger. On why bond failover cannot be used here ?: the point that nikolay was alluding to is, switch-peerlink in the above example is a bridge port and is a failover/backport port for more than one or all ports in the bridge br0. And you cannot enslave switch-peerlink into a second level team with other bridge ports. Hence a multi layered team device is not an option (FWIW, switch-peerlink is also a teamed interface to the peer switch)." v3: Added Roopa's explanation and diagram v2: In patch 01 use kstrdup/kfree to avoid casting the const buf. In order to avoid using GFP_ATOMIC or always allocating I kept the spinlock inside each branch. ==================== Signed-off-by: -
Nikolay Aleksandrov authored
This patch adds a new port attribute - IFLA_BRPORT_BACKUP_PORT, which allows to set a backup port to be used for known unicast traffic if the port has gone carrier down. The backup pointer is rcu protected and set only under RTNL, a counter is maintained so when deleting a port we know how many other ports reference it as a backup and we remove it from all. Also the pointer is in the first cache line which is hot at the time of the check and thus in the common case we only add one more test. The backup port will be used only for the non-flooding case since it's a part of the bridge and the flooded packets will be forwarded to it anyway. To remove the forwarding just send a 0/non-existing backup port. This is used to avoid numerous scalability problems when using MLAG most notably if we have thousands of fdbs one would need to change all of them on port carrier going down which takes too long and causes a storm of fdb notifications (and again when the port comes back up). In a Multi-chassis Link Aggregation setup usually hosts are connected to two different switches which act as a single logical switch. Those switches usually have a control and backup link between them called peerlink which might be used for communication in case a host loses connectivity to one of them. We need a fast way to failover in case a host port goes down and currently none of the solutions (like bond) cannot fulfill the requirements because the participating ports are actually the "master" devices and must have the same peerlink as their backup interface and at the same time all of them must participate in the bridge device. As Roopa noted it's normal practice in routing called fast re-route where a precalculated backup path is used when the main one is down. Another use case of this is with EVPN, having a single vxlan device which is backup of every port. Due to the nature of master devices it's not currently possible to use one device as a backup for many and still have all of them participate in the bridge (which is master itself). More detailed information about MLAG is available at the link below. https://docs.cumulusnetworks.com/display/DOCS/Multi-Chassis+Link+Aggregation+-+MLAG Further explanation and a diagram by Roopa: Two switches acting in a MLAG pair are connected by the peerlink interface which is a bridge port. the config on one of the switches looks like the below. The other switch also has a similar config. eth0 is connected to one port on the server. And the server is connected to both switches. br0 -- team0---eth0 | -- switch-peerlink Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Nikolay Aleksandrov authored
This patch adds a new alternative store callback for port sysfs options which takes a raw value (buf) and can use it directly. It is needed for the backup port sysfs support since we have to pass the device by its name. Signed-off-by:
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YueHaibing authored
Use dma_zalloc_coherent instead of dma_alloc_coherent followed by memset 0. Signed-off-by:
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- 22 Jul, 2018 18 commits
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Jakub Kicinski authored
After device is stopped we reset the rings by moving all free buffers to positions [0, cnt - 2], and clear the position cnt - 1 in the ring. We then proceed to clear the read/write pointers. This means that if we try to reset the ring again the code will assume that the next to fill buffer is at position 0 and swap it with cnt - 1. Since we previously cleared position cnt - 1 it will lead to leaking the first buffer and leaving ring in a bad state. This scenario can only happen if FW communication fails, in which case the ring will never be used again, so the fact it's in a bad state will not be noticed. Buffer leak is the only problem. Don't try to move buffers in the ring if the read/write pointers indicate the ring was never used or have already been reset. nfp_net_clear_config_and_disable() is now fully idempotent. Found by code inspection, FW communication failures are very rare, and reconfiguring a live device is not common either, so it's unlikely anyone has ever noticed the leak. Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by:
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Jakub Kicinski authored
Now that we have offload replay infrastructure added by commit 32636742 ("net: sched: call reoffload op on block callback reg") and flows are guaranteed to be removed correctly, we can revert commit 951a8ee6 ("nfp: reject binding to shared blocks"). Signed-off-by:
John Hurley <john.hurley@netronome.com> Signed-off-by:
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Vitaly Kuznetsov authored
Commit f599c64f ("xen-netfront: Fix race between device setup and open") changed the initialization order: xennet_create_queues() now happens before we do register_netdev() so using netdev->name in xennet_init_queue() is incorrect, we end up with the following in /proc/interrupts: 60: 139 0 xen-dyn -event eth%d-q0-tx 61: 265 0 xen-dyn -event eth%d-q0-rx 62: 234 0 xen-dyn -event eth%d-q1-tx 63: 1 0 xen-dyn -event eth%d-q1-rx and this looks ugly. Actually, using early netdev name (even when it's already set) is also not ideal: nowadays we tend to rename eth devices and queue name may end up not corresponding to the netdev name. Use nodename from xenbus device for queue naming: this can't change in VM's lifetime. Now /proc/interrupts looks like 62: 202 0 xen-dyn -event device/vif/0-q0-tx 63: 317 0 xen-dyn -event device/vif/0-q0-rx 64: 262 0 xen-dyn -event device/vif/0-q1-tx 65: 17 0 xen-dyn -event device/vif/0-q1-rx Fixes: f599c64f ("xen-netfront: Fix race between device setup and open") Signed-off-by:
Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by:
Ross Lagerwall <ross.lagerwall@citrix.com> Signed-off-by:
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Randy Dunlap authored
Add MODULE_LICENSE() to net/dsa/realtek.o to fix build warning message. WARNING: modpost: missing MODULE_LICENSE() in drivers/net/dsa/realtek.o Signed-off-by:
Randy Dunlap <rdunlap@infradead.org> Cc: Linus Walleij <linus.walleij@linaro.org> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Nikolay Aleksandrov authored
As was recently discussed [1], let's avoid casting the const buf in bonding_sysfs_store_option and use kstrndup/kfree instead. [1] http://lists.openwall.net/netdev/2018/07/22/25Signed-off-by:
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David S. Miller authored
Jason Wang says: ==================== TX used ring batched updating for vhost This series implement batch updating of used ring for TX. This help to reduce the cache contention on used ring. The idea is first split datacopy path from zerocopy, and do only batching for datacopy. This is because zercopy had already supported its own batching. TX PPS was increased 25.8% and Netperf TCP does not show obvious differences. The split of datapath will also be helpful for future implementation like in order completion. ==================== Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Jason Wang authored
Like commit e2b3b35e ("vhost_net: batch used ring update in rx"), this patches implements batch used ring update for datacopy TX (zerocopy has already done some kind of batching). Testpmd transmission from guest to host (XDP_DROP on tap) shows 25.8% improvement (from ~3.1Mpps to ~3.9Mpps) on Broadwell i7-5600U CPU @ 2.60GHz machine. Netperf TCP tests does not show obvious differences. Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
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Jason Wang authored
A more generic name which could be used for TX as well. Signed-off-by:
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Jason Wang authored
Rename for reusing this for TX. Signed-off-by:
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Jason Wang authored
Instead of mixing zerocopy and datacopy logics, this patch tries to split datacopy logic out. This results for a more compact code and ad-hoc optimization could be done on top more easily. Signed-off-by:
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Jason Wang authored
Introduce tx_can_batch() to determine whether TX could be batched. This will help to reduce the code duplication in the future. Signed-off-by:
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Jason Wang authored
Factor out logic of getting tx buffer and iov iter initialization. This will be used for reducing codes duplication in the future. Signed-off-by:
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Jason Wang authored
Signed-off-by:
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Jason Wang authored
Introduce init_iov_iter() in order to be reused by future patch. Signed-off-by:
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Jason Wang authored
Signed-off-by:
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Hangbin Liu authored
Remove the mode parameter for igmp/igmp6_group_added as we can get it from first parameter. Fixes: 6e2059b5 (ipv4/igmp: init group mode as INCLUDE when join source group) Fixes: c7ea20c9 (ipv6/mcast: init as INCLUDE when join SSM INCLUDE group) Signed-off-by:
Hangbin Liu <liuhangbin@gmail.com> Signed-off-by:
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Mark Railton authored
Moved end of comment to it's own line per guide Signed-off-by:
Mark Railton <mark@markrailton.com> Signed-off-by:
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Guenter Roeck authored
"imply HWMON" was supposed to ensure that the SFP phy code can be built with HWMON enabled or disabled while at the same time ensuring that HWMON is not built as module if SFP is built into the kernel. Unfortunately, that does not work as intended. With "allmodconfig", it results in several unrelated HWMON drivers to be disabled instead of being built as module as expected. Let's use the old "depends on HWMON || HWMON=n" instead. This is slightly different (it enforces SFP to be built as module if HWMON is built as module), but it is better than the alternative of using "IS_REACHABLE()" in the driver since that would disable sensor support if HWMON is built as module and SFP is built into the kernel. Fixes: 1323061a ("net: phy: sfp: Add HWMON support for module sensors") Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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- 21 Jul, 2018 14 commits
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YueHaibing authored
Use vzalloc instead of the vmalloc, memset combo Signed-off-by:
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YueHaibing authored
Use dma_zalloc_coherent instead of dma_alloc_coherent followed by memset 0. Signed-off-by:
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YueHaibing authored
Fixes the following sparse warnings: net/tipc/link.c:376:5: warning: symbol 'link_bc_rcv_gap' was not declared. Should it be static? net/tipc/link.c:823:6: warning: symbol 'link_prepare_wakeup' was not declared. Should it be static? net/tipc/link.c:959:6: warning: symbol 'tipc_link_advance_backlog' was not declared. Should it be static? net/tipc/link.c:1009:5: warning: symbol 'tipc_link_retrans' was not declared. Should it be static? net/tipc/monitor.c:687:5: warning: symbol '__tipc_nl_add_monitor_peer' was not declared. Should it be static? net/tipc/group.c:230:20: warning: symbol 'tipc_group_find_member' was not declared. Should it be static? Signed-off-by:
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Gustavo A. R. Silva authored
This line makes up what macro PTR_ERR_OR_ZERO already does. So, make use of PTR_ERR_OR_ZERO rather than an open-code version. This code was detected with the help of Coccinelle. Signed-off-by:
Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by:
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David S. Miller authored
Jon Maxwell says: ==================== tcp: improve setsockopt() TCP_USER_TIMEOUT accuracy The patch was becoming bigger based on feedback therefore I have implemented a series of 3 commits instead in V4. This series is a continuation based on V3 here and associated feedback: https://patchwork.kernel.org/patch/10516195/ Suggestions by Neal Cardwell: 1) Fix up units mismatch regarding msec/jiffies. 2) Address possiblility of time_remaining being negative. 3) Add a helper routine tcp_clamp_rto_to_user_timeout() to do the rto calculation. 4) Move start_ts logic into helper routine tcp_retrans_stamp() to validate tcp_sk(sk)->retrans_stamp. 5) Some u32 declation and return refactoring. 6) Return 0 instead of false in tcp_retransmit_stamp(), it's not a bool. Suggestions by David Laight: 1) Don't cache rto in tcp_clamp_rto_to_user_timeout(). Suggestions by Eric Dumazet: 1) Make u32 declartions consistent. 2) Use patch series for easier review. 3) Convert icsk->icsk_user_timeout to millisconds to avoid jiffie to msec dance. 4) Use seperate titles for each commit in the series. 5) Fix fuzzy indentation and line wrap issues. 6) Make commit titles descriptive. Changes: 1) Call tcp_clamp_rto_to_user_timeout(sk) as an argument to inet_csk_reset_xmit_timer() to save on rto declaration. Every time the TCP retransmission timer fires. It checks to see if there is a timeout before scheduling the next retransmit timer. The retransmit interval between each retransmission increases exponentially. The issue is that in order for the timeout to occur the retransmit timer needs to fire again. If the user timeout check happens after the 9th retransmit for example. It needs to wait for the 10th retransmit timer to fire in order to evaluate whether a timeout has occurred or not. If the interval is large enough then the timeout will be inaccurate. For example with a TCP_USER_TIMEOUT of 10 seconds without patch: 1st retransmit: 22:25:18.973488 IP host1.49310 > host2.search-agent: Flags [.] Last retransmit: 22:25:26.205499 IP host1.49310 > host2.search-agent: Flags [.] Timeout: send: Connection timed out Sun Jul 1 22:25:34 EDT 2018 We can see that last retransmit took ~7 seconds. Which pushed the total timeout to ~15 seconds instead of the expected 10 seconds. This gets more inaccurate the larger the TCP_USER_TIMEOUT value. As the interval increases. Add tcp_clamp_rto_to_user_timeout() to determine if the user rto has expired. Or whether the rto interval needs to be recalculated. Use the original interval if user rto is not set. Test results with the patch is the expected 10 second timeout: 1st retransmit: 01:37:59.022555 IP host1.49310 > host2.search-agent: Flags [.] Last retransmit: 01:38:06.486558 IP host1.49310 > host2.search-agent: Flags [.] Timeout: send: Connection timed out Mon Jul 2 01:38:09 EDT 2018 ==================== Signed-off-by:
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Jon Maxwell authored
Create the tcp_clamp_rto_to_user_timeout() helper routine. To calculate the correct rto, so that the TCP_USER_TIMEOUT socket option is more accurate. Taking suggestions and feedback into account from Eric Dumazet, Neal Cardwell and David Laight. Due to the 1st commit we can avoid the msecs_to_jiffies() and jiffies_to_msecs() dance. Signed-off-by:
Jon Maxwell <jmaxwell37@gmail.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Jon Maxwell authored
Create a seperate helper routine as per Neal Cardwells suggestion. To be used by the final commit in this series and retransmits_timed_out(). Signed-off-by:
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Jon Maxwell authored
This is a preparatory commit. Part of this series that improves the socket TCP_USER_TIMEOUT option accuracy. Implement Eric Dumazets idea to convert icsk->icsk_user_timeout from jiffies to msecs. To eliminate the msecs_to_jiffies() and jiffies_to_msecs() dance in future. Signed-off-by:
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David S. Miller authored
Julian Wiedmann says: ==================== s390/qeth: updates 2018-07-19 please apply one more round of qeth patches to net-next. This brings additional performance improvements for the transmit code, and some refactoring to pave the way for using netdev_priv. Also, two minor fixes for rare corner cases. ==================== Signed-off-by: -
Julian Wiedmann authored
Modify the L2 OSA xmit path so that it also supports L2 IQD devices (in particular, their HW header requirements). This allows IQD devices to advertise NETIF_F_SG support, and eliminates the allocation overhead for the HW header. Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by:
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Julian Wiedmann authored
Some transmit modes require that the HW header is located in the same page as the initial protocol headers in skb->data. Let callers specify the size of this contiguous header range, and enforce it when building the HW header. While at it, apply some gentle renaming to the relevant L2 code so that it matches the L3 code. Signed-off-by:
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Julian Wiedmann authored
When checking whether an skb needs to be linearized to fit into an IO buffer, it's desirable to consider the skb's final size and layout (ie. after the HW header was added). But a subsequent linearization can then cause the re-positioned HW header to violate its alignment restrictions. Dealing with this situation in two different code paths is quite tricky. This patch integrates a) linearize-check and b) HW header construction into one 3 step-sequence: 1. evaluate how the HW header needs to be added (to identify if it takes up an additional buffer element), then 2. check if the required buffer elements exceed the device's limit. Linearize when necessary and re-evaluate the HW header placement. 3. Add the HW header in the best-possible way: a) push, without taking up an additional buffer element b) push, but consume another buffer element c) allocate a header object from the cache. Signed-off-by:
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Julian Wiedmann authored
Nowadays an skb fragment typically spans over multiple pages. So replace the obsolete, SG-only 'fragments' counter with one that tracks the consumed buffer elements. This is what actually matters for performance. Signed-off-by:
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Julian Wiedmann authored
qeth's ndo_change_mtu() only applies some trivial bounds checking. Set up dev->min_mtu properly, so that dev_set_mtu() can do this for us. Signed-off-by:
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