- 06 Dec, 2018 36 commits
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David S. Miller authored
Petr Machata says: ==================== Pass extack to NETDEV_PRE_UP Drivers may need to validate configuration of a device that's about to be upped. An example is mlxsw, which needs to check the configuration of a VXLAN device attached to an offloaded bridge. Should the validation fail, there's currently no way to communicate details of the failure to the user, beyond an error number. Therefore this patch set extends the NETDEV_PRE_UP event to include extack, if available. There are three vectors through which NETDEV_PRE_UP invocation can be reached. The two major ones are dev_open() and dev_change_flags(), the last is then __dev_change_flags(). In patch #1, the first access vector, dev_open() is addressed. An extack parameter is added and all users converted to use it. Before addressing the second vector, two preparatory patches propagate extack argument to the proximity of the dev_change_flags() call in VRF and IPVLAN drivers. That happens in patches #2 and #3. Then in patch #4, dev_change_flags() is treated similarly to dev_open(). Likewise in patch #5, __dev_change_flags() is extended. Then in patches #6 and #7, the extack is finally propagated all the way to the point where the notification is emitted. This change allows particularly mlxsw (which already has code to leverage extack if available) to communicate to the user error messages regarding VXLAN configuration. In patch #8, add a test case that exercises this code and checks that an error message is propagated. For example: local 192.0.2.17 remote 192.0.2.18 \ dstport 4789 nolearning noudpcsum tos inherit ttl 100 local 192.0.2.17 remote 192.0.2.18 \ dstport 4789 nolearning noudpcsum tos inherit ttl 100 Error: mlxsw_spectrum: Conflicting NVE tunnels configuration. v2: - Add David Ahern's tags. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Petr Machata authored
Add a testsuite dedicated to testing extack propagation and related functionality. Signed-off-by:
Petr Machata <petrm@mellanox.com> Acked-by:
Jiri Pirko <jiri@mellanox.com> Reviewed-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
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Petr Machata authored
Drivers may need to validate configuration of a device that's about to be upped. Should the validation fail, there's currently no way to communicate details of the failure to the user, beyond an error number. To mend that, change __dev_open() to take an extack argument and pass it from __dev_change_flags() and dev_open(), where it was propagated in the previous patches. Change __dev_open() to call call_netdevice_notifiers_extack() so that the passed-in extack is attached to the NETDEV_PRE_UP notifier. Signed-off-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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Petr Machata authored
In order to propagate extack through NETDEV_PRE_UP, add a new function call_netdevice_notifiers_extack() that primes the extack field of the notifier info. Convert call_netdevice_notifiers() to a simple wrapper around the new function that passes NULL for extack. Signed-off-by:
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Petr Machata authored
In order to pass extack together with NETDEV_PRE_UP notifications, it's necessary to route the extack to __dev_open() from diverse (possibly indirect) callers. The last missing API is __dev_change_flags(). Therefore extend __dev_change_flags() with and extra extack argument and update the two existing users. Since the function declaration line is changed anyway, name the struct net_device argument to placate checkpatch. Signed-off-by:
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Petr Machata authored
In order to pass extack together with NETDEV_PRE_UP notifications, it's necessary to route the extack to __dev_open() from diverse (possibly indirect) callers. One prominent API through which the notification is invoked is dev_change_flags(). Therefore extend dev_change_flags() with and extra extack argument and update all users. Most of the calls end up just encoding NULL, but several sites (VLAN, ipvlan, VRF, rtnetlink) do have extack available. Since the function declaration line is changed anyway, name the other function arguments to placate checkpatch. Signed-off-by:
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Petr Machata authored
A follow-up patch will extend dev_change_flags() with an extack argument. Extend ipvlan_set_port_mode() to have that argument available for the conversion. Signed-off-by:
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Petr Machata authored
A follow-up patch will extend dev_change_flags() with an extack argument. Extend cycle_netdev() to have that argument available for the conversion. Signed-off-by:
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Petr Machata authored
In order to pass extack together with NETDEV_PRE_UP notifications, it's necessary to route the extack to __dev_open() from diverse (possibly indirect) callers. One prominent API through which the notification is invoked is dev_open(). Therefore extend dev_open() with and extra extack argument and update all users. Most of the calls end up just encoding NULL, but bond and team drivers have the extack readily available. Signed-off-by:
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Pedro Tammela authored
2 goto labels are indented with a tab. remove the tabs and keep the code style consistent. Signed-off-by:
Pedro Tammela <pctammela@gmail.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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David S. Miller authored
Andrew Lunn says: ==================== Adjust MTU of DSA master interface DSA makes use of additional headers to direct a frame in/out of a specific port of the switch. When the slave interfaces uses an MTU of 1500, the master interface can be asked to handle frames with an MTU of 1504, or 1508 bytes. Some Ethernet interfaces won't transmit/receive frames which are bigger than their MTU. Automate the increasing of the MTU on the master interface, by adding to each tagging driver how much overhead they need, and then calling dev_set_mtu() of the master interface to increase its MTU as needed. ==================== Signed-off-by: -
Andrew Lunn authored
DSA tagging of frames sent over the master interface to the switch increases the size of the frame. Such frames can then be bigger than the normal MTU of the master interface, and it may drop them. Use the overhead information from the tagger to set the MTU of the master device to include this overhead. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
Each DSA tag protocol needs to add additional headers to the Ethernet frame in order to direct it towards a specific switch egress port. It must also remove the head from a frame received from a switch. Indicate the maximum size of these headers in the tag protocol ops structure, so the core can take these overheads into account. Signed-off-by:
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Li RongQing authored
caller has guaranted that rxhash is not zero Signed-off-by:
Li RongQing <lirongqing@baidu.com> Acked-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
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Li RongQing authored
tun flow entry 'updated' fields are written when receive every packet. Thus if a flow is receiving packets from a particular flow entry, it'll cause false-sharing with all the other who has looked it up, so move it in its own cache line and update 'queue_index' and 'update' field only when they are changed to reduce the cache false-sharing. Signed-off-by:
Zhang Yu <zhangyu31@baidu.com> Signed-off-by:
Wang Li <wangli39@baidu.com> Signed-off-by:
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David Ahern authored
Add extack messages for failures in neigh_add and neigh_delete. Signed-off-by:
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Hoang Le authored
When setting LINK tolerance, node timer interval will be calculated base on the LINK with lowest tolerance. But when calculated, the old node timer interval only updated if current setting value (tolerance/4) less than old ones regardless of number of links as well as links' lowest tolerance value. This caused to two cases missing if tolerance changed as following: Case 1: 1.1/ There is one link (L1) available in the system 1.2/ Set L1's tolerance from 1500ms => lower (i.e 500ms) 1.3/ Then, fallback to default (1500ms) or higher (i.e 2000ms) Expected: node timer interval is 1500/4=375ms after 1.3 Result: node timer interval will not being updated after changing tolerance at 1.3 since its value 1500/4=375ms is not less than 500/4=125ms at 1.2. Case 2: 2.1/ There are two links (L1, L2) available in the system 2.2/ L1 and L2 tolerance value are 2000ms as initial 2.3/ Set L2's tolerance from 2000ms => lower 1500ms 2.4/ Disable link L2 (bring down its bearer) Expected: node timer interval is 2000ms/4=500ms after 2.4 Result: node timer interval will not being updated after disabling L2 since its value 2000ms/4=500ms is still not less than 1500/4=375ms at 2.3 although L2 is already not available in the system. To fix this, we start the node interval calculation by initializing it to a value larger than any conceivable calculated value. This way, the link with the lowest tolerance will always determine the calculated value. Acked-by:Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
Hoang Le <hoang.h.le@dektech.com.au> Signed-off-by:
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Rob Herring authored
Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. For instances using of_node_cmp, this has the side effect of now using case sensitive comparisons. This should not matter for any FDT based system which all of these are. Cc: "David S. Miller" <davem@davemloft.net> Cc: Claudiu Manoil <claudiu.manoil@nxp.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Wingman Kwok <w-kwok2@ti.com> Cc: Murali Karicheri <m-karicheri2@ti.com> Cc: netdev@vger.kernel.org Cc: linux-omap@vger.kernel.org Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Peter Oskolkov authored
When testing high-bandwidth TCP streams with large windows, high latency, and low jitter, netem consumes a lot of CPU cycles doing rbtree rebalancing. This patch uses a linear list/queue in addition to the rbtree: if an incoming packet is past the tail of the linear queue, it is added there, otherwise it is inserted into the rbtree. Without this patch, perf shows netem_enqueue, netem_dequeue, and rb_* functions among the top offenders. With this patch, only netem_enqueue is noticeable if jitter is low/absent. Suggested-by:
Peter Oskolkov <posk@google.com> Reviewed-by:
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David S. Miller authored
Nikolay Aleksandrov says: ==================== net: bridge: convert multicast to generic rhashtable The current bridge multicast code uses a custom rhashtable implementation which predates the generic rhashtable API. Patch 01 converts it to use the generic kernel rhashtable which simplifies the code a lot and removes duplicated functionality. The convert also makes hash_elasticity obsolete as the generic rhashtable already has such checks and has a fixed elasticity of RHT_ELASTICITY (16 currently) so we emit a warning whenever elasticity is set and return RHT_ELASTICITY when read (patch 03). Patch 02 converts the multicast code to use non-bh RCU flavor as it was mixing bh and non-bh. Since now we have the generic rhashtable which autoshrinks we can be more liberal with the default hash maximum so patch 04 increases it to 4096 and moves it to a define in br_private.h. v3: add non-rcu br_mdb_get variant and use it where we have multicast_lock, drop special hash_max handling and just set it where needed and use non-bh RCU consistently (patch 02, new) v2: send the latest version of the set which handles when IGMP snooping is not defined, changes are in patch 01 ==================== Signed-off-by: -
Nikolay Aleksandrov authored
bridge's default hash_max was 512 which is rather conservative, now that we're using the generic rhashtable API which autoshrinks let's increase it to 4096 and move it to a define in br_private.h. Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Nikolay Aleksandrov authored
Now that the bridge multicast uses the generic rhashtable interface we can drop the hash_elasticity option as that is already done for us and it's hardcoded to a maximum of RHT_ELASTICITY (16 currently). Add a warning about the obsolete option when the hash_elasticity is set. Signed-off-by:
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Nikolay Aleksandrov authored
The bridge multicast code has been using a mix of RCU and RCU-bh flavors sometimes in questionable way. Since we've moved to rhashtable just use non-bh RCU everywhere. In addition this simplifies freeing of objects and allows us to remove some unnecessary callback functions. v3: new patch Signed-off-by:
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Nikolay Aleksandrov authored
The bridge multicast code currently uses a custom resizable hashtable which predates the generic rhashtable interface. It has many shortcomings compared and duplicates functionality that is presently available via the generic rhashtable, so this patch removes the custom rhashtable implementation in favor of the kernel's generic rhashtable. The hash maximum is kept and the rhashtable's size is used to do a loose check if it's reached in which case we revert to the old behaviour and disable further bridge multicast processing. Also now we can support any hash maximum, doesn't need to be a power of 2. v3: add non-rcu br_mdb_get variant and use it where multicast_lock is held to avoid RCU splat, drop hash_max function and just set it directly v2: handle when IGMP snooping is undefined, add br_mdb_init/uninit placeholders Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linuxDavid S. Miller authored
Saeed Mahameed says: ==================== mlx5e-updates-2018-12-04 This series includes updates to mlx5e netdevice driver From Saeed, Remove trailing space of tx_pause ethtool stat From Gal, Cleanup unused defines From Aya, ethtool Support for configuring of RX hash fields From Tariq, Improve ethtool private-flags code structure ==================== Signed-off-by: -
David S. Miller authored
Andrew Lunn says: ==================== u32 to linkmode fixes This patchset fixes issues found in the last patchset which converted the phydev advertise etc, from a u32 to a linux bitmap. Most of the issues are the result of clearing bits which should not of been cleared. To make the API clearer, the idea from Heiner Kallweit was used, with _mod_ to indicate the function modifies just the bits it needs to, or _to_ to clear all bits and just set bit that need to be set. ==================== Signed-off-by: -
Andrew Lunn authored
When the MII_ADVERTISE register is modified by the IOCTL handler, phydev->advertising needs recalculating. Use the _mod_ variant of mii_adv_to_linkmode_adv_t so that bits outside of the advertise registers are not cleared. Fixes: c0ec3c27 ("net: phy: Convert u32 phydev->lp_advertising to linkmode") Reported-by:
Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
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Andrew Lunn authored
Replace the if else code structure with a call to the helper linkmode_mod_bit. Signed-off-by:
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Andrew Lunn authored
Add a _mod_ variant of mii_lpa_to_linkmode_lpa_t. Use this to fix the genphy_read_status() where the 1G link partner features are getting lost. Fixes: c0ec3c27 ("net: phy: Convert u32 phydev->lp_advertising to linkmode") Reported-by:
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Andrew Lunn authored
Rename mii_lpa_to_linkmode_lpa_t to mii_lpa_mod_linkmode_lpa_t to indicate it modifies the passed linkmode bitmap, without clearing any other bits. Also, ensure bit are clear which the lpa indicates should not be set. Fixes: c0ec3c27 ("net: phy: Convert u32 phydev->lp_advertising to linkmode") Suggested-by:
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Andrew Lunn authored
Rename mii_stat1000_to_linkmode_lpa_t to mii_stat1000_mod_linkmode_lpa_t to indicate it modifies the passed linkmode bitmap, without clearing any other bits. Add a helper to set/clear bits in a linkmode. Use this helper to ensure bit are clear which the stat1000 indicates should not be set. Fixes: c0ec3c27 ("net: phy: Convert u32 phydev->lp_advertising to linkmode") Suggested-by:
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Andrew Lunn authored
mii_adv_to_linkmode_adv_t() clears all bits before setting it needs to set. This means the freshly set Autoneg gets cleared. Change the order, and add comments about it clearing the old content of the bitmap. Fixes: c0ec3c27 ("net: phy: Convert u32 phydev->lp_advertising to linkmode") Reported-by:
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Tariq Toukan authored
Refactor the code of private-flags setter. Replace consecutive calls to mlx5e_handle_pflag with a loop that uses a preset set of parameters. Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com>
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Aya Levin authored
Enable user configuration of RX hash fields that are used for traffic spreading into RX queues. User can change built-in RSS (Receive Side Scaling) profiles on the following traffic types: UDP4, UDP6, TCP4 and TCP6. This configuration effects both outer and inner headers. Added support for ethtool commands: ETHTOOL_SRXFH and ETHTOOL_GRXFH. Command example respectively: $ethtool -N eth1 rx-flow-hash tcp4 sdfn $ethtool -n eth1 rx-flow-hash tcpp4 IP SA IP DA L4 bytes 0 & 1 [TCP/UDP src port] L4 bytes 2 & 3 [TCP/UDP dst port] Signed-off-by:
Aya Levin <ayal@mellanox.com> Reviewed-by:
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Aya Levin authored
Remove RSS params from params struct under channels, and introduce a new struct with RSS configuration params under priv struct. There is no functional change here. Signed-off-by:
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Aya Levin authored
Refactor mlx5e_build_indir_tir_ctx_hash for better code re-use. TIR stands for Transport Interface Receive, which is responsible for all transport related operations on the receive side. Added a static array with TIR default configuration values. This separates configuration values from command setting, which is needed for downstream patch. Signed-off-by:
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- 05 Dec, 2018 4 commits
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Jakub Kicinski authored
Documentation/networking/ is full of cryptically named files with driver documentation. This makes finding interesting information at a glance really hard. Move all those files into a directory called device_drivers (since not all drivers are for device) and fix up references. RFC v0.1 -> RFC v1: - also add .txt suffix to the files which are missing it (Quentin) Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Quentin Monnet <quentin.monnet@netronome.com> Acked-by:
Henrik Austad <henrik@austad.us> Signed-off-by:
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Eric Dumazet authored
TCP_NOTSENT_LOWAT socket option or sysctl was added in linux-3.12 as a step to enable bigger tcp sndbuf limits. It works reasonably well, but the following happens : Once the limit is reached, TCP stack generates an [E]POLLOUT event for every incoming ACK packet. This causes a high number of context switches. This patch implements the strategy David Miller added in sock_def_write_space() : - If TCP socket has a notsent_lowat constraint of X bytes, allow sendmsg() to fill up to X bytes, but send [E]POLLOUT only if number of notsent bytes is below X/2 This considerably reduces TCP_NOTSENT_LOWAT overhead, while allowing to keep the pipe full. Tested: 100 ms RTT netem testbed between A and B, 100 concurrent TCP_STREAM A:/# cat /proc/sys/net/ipv4/tcp_wmem 4096 262144 64000000 A:/# super_netperf 100 -H B -l 1000 -- -K bbr & A:/# grep TCP /proc/net/sockstat TCP: inuse 203 orphan 0 tw 19 alloc 414 mem 1364904 # This is about 54 MB of memory per flow :/ A:/# vmstat 5 5 procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 256220672 13532 694976 0 0 10 0 28 14 0 1 99 0 0 2 0 0 256320016 13532 698480 0 0 512 0 715901 5927 0 10 90 0 0 0 0 0 256197232 13532 700992 0 0 735 13 771161 5849 0 11 89 0 0 1 0 0 256233824 13532 703320 0 0 512 23 719650 6635 0 11 89 0 0 2 0 0 256226880 13532 705780 0 0 642 4 775650 6009 0 12 88 0 0 A:/# echo 2097152 >/proc/sys/net/ipv4/tcp_notsent_lowat A:/# grep TCP /proc/net/sockstat TCP: inuse 203 orphan 0 tw 19 alloc 414 mem 86411 # 3.5 MB per flow A:/# vmstat 5 5 # check that context switches have not inflated too much. procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 2 0 0 260386512 13592 662148 0 0 10 0 17 14 0 1 99 0 0 0 0 0 260519680 13592 604184 0 0 512 13 726843 12424 0 10 90 0 0 1 1 0 260435424 13592 598360 0 0 512 25 764645 12925 0 10 90 0 0 1 0 0 260855392 13592 578380 0 0 512 7 722943 13624 0 11 88 0 0 1 0 0 260445008 13592 601176 0 0 614 34 772288 14317 0 10 90 0 0 Signed-off-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
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David S. Miller authored
Or Gerlitz says: ==================== net/sched: act_tunnel_key: support key-less tunnels This short series from Adi Nissim allows to support key-less tunnels by the tc tunnel key actions, which is needed for some GRE use-cases. changes from V0: - addresses build warning spotted by kbuild, make sure to always init to zero the tunnel key ==================== Signed-off-by: -
Adi Nissim authored
It's possible to set a tunnel without a destination port. However, on dump(), a zero dst port is returned to user space even if it was not set, fix that. Note that so far it wasn't required, b/c key less tunnels were not supported and the UDP tunnels do require destination port. Signed-off-by:
Adi Nissim <adin@mellanox.com> Reviewed-by:
Oz Shlomo <ozsh@mellanox.com> Acked-by:
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