BMC/Intel-BMC/linux.git/include/net/dst_metadata.h, branch master

net: store port/representator id in metadata_dst

2017-06-25T15:42:01+00:00

Switches and modern SR-IOV enabled NICs may multiplex traffic from Port representators and control messages over single set of hardware queues. Control messages and muxed traffic may need ordered delivery. Those requirements make it hard to comfortably use TC infrastructure today unless we have a way of attaching metadata to skbs at the upper device. Because single set of queues is used for many netdevs stopping TC/sched queues of all of them reliably is impossible and lower device has to retreat to returning NETDEV_TX_BUSY and usually has to take extra locks on the fastpath. This patch attempts to enable port/representative devs to attach metadata to skbs which carry port id. This way representatives can be queueless and all queuing can be performed at the lower netdev in the usual way. Traffic arriving on the port/representative interfaces will be have metadata attached and will subsequently be queued to the lower device for transmission. The lower device should recognize the metadata and translate it to HW specific format which is most likely either a special header inserted before the network headers or descriptor/metadata fields. Metadata is associated with the lower device by storing the netdev pointer along with port id so that if TC decides to redirect or mirror the new netdev will not try to interpret it. This is mostly for SR-IOV devices since switches don't have lower netdevs today. Signed-off-by: Jakub Kicinski Signed-off-by: Sridhar Samudrala Signed-off-by: Simon Horman Signed-off-by: David S. Miller

net/dst: Add dst port to dst_metadata utility functions

2016-11-09T18:41:54+00:00

Add dst port parameter to __ip_tun_set_dst and __ipv6_tun_set_dst utility functions. Signed-off-by: Hadar Hen Zion Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller

net/dst: Utility functions to build dst_metadata without supplying an skb

2016-09-11T03:53:55+00:00

Extract __ip_tun_set_dst() and __ipv6_tun_set_dst() out of ip_tun_rx_dst() and ipv6_tun_rx_dst(), to be used without supplying an skb. Signed-off-by: Amir Vadai Signed-off-by: Hadar Hen Zion Acked-by: Jiri Pirko Reviewed-by: Shmulik Ladkani Signed-off-by: David S. Miller

ip_tunnel: add support for setting flow label via collect metadata

2016-03-11T20:14:26+00:00

This patch extends udp_tunnel6_xmit_skb() to pass in the IPv6 flow label from call sites. Currently, there's no such option and it's always set to zero when writing ip6_flow_hdr(). Add a label member to ip_tunnel_key, so that flow-based tunnels via collect metadata frontends can make use of it. vxlan and geneve will be converted to add flow label support separately. Signed-off-by: Daniel Borkmann Signed-off-by: David S. Miller

net: add dst_cache to ovs vxlan lwtunnel

2016-02-17T01:21:48+00:00

In case of UDP traffic with datagram length below MTU this give about 2% performance increase when tunneling over ipv4 and about 60% when tunneling over ipv6 Signed-off-by: Paolo Abeni Suggested-and-acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

gro: Make GRO aware of lightweight tunnels.

2016-01-21T02:48:38+00:00

GRO is currently not aware of tunnel metadata generated by lightweight tunnels and stored in the dst. This leads to two possible problems: * Incorrectly merging two frames that have different metadata. * Leaking of allocated metadata from merged frames. This avoids those problems by comparing the tunnel information before merging, similar to how we handle other metadata (such as vlan tags), and releasing any state when we are done. Reported-by: John Fixes: 2e15ea39 ("ip_gre: Add support to collect tunnel metadata.") Signed-off-by: Jesse Gross Acked-by: Eric Dumazet Acked-by: Thomas Graf Signed-off-by: David S. Miller

tun_dst: Fix potential NULL dereference

2015-11-05T02:59:22+00:00

In tun_dst_unclone() the return value of skb_metadata_dst() is checked for being NULL after it is dereferenced. Fix this by moving the dereference after the NULL check. Found by the Coverity scanner (CID 1338068). Fixes: fc4099f17240 ("openvswitch: Fix egress tunnel info.") Cc: Pravin B Shelar Signed-off-by: Tobias Klauser Signed-off-by: David S. Miller

openvswitch: Fix egress tunnel info.

2015-10-23T02:39:25+00:00

While transitioning to netdev based vport we broke OVS feature which allows user to retrieve tunnel packet egress information for lwtunnel devices. Following patch fixes it by introducing ndo operation to get the tunnel egress info. Same ndo operation can be used for lwtunnel devices and compat ovs-tnl-vport devices. So after adding such device operation we can remove similar operation from ovs-vport. Fixes: 614732eaa12d ("openvswitch: Use regular VXLAN net_device device"). Signed-off-by: Pravin B Shelar Signed-off-by: David S. Miller

tun_dst: Remove opts_size

2015-09-01T04:23:42+00:00

opts_size is only written and never read. Following patch removes this unused variable. Signed-off-by: Pravin B Shelar Signed-off-by: David S. Miller

ip-tunnel: Use API to access tunnel metadata options.

2015-08-31T19:28:56+00:00

Currently tun-info options pointer is used in few cases to pass options around. But tunnel options can be accessed using ip_tunnel_info_opts() API without using the pointer. Following patch removes the redundant pointer and consistently make use of API. Signed-off-by: Pravin B Shelar Acked-by: Thomas Graf Reviewed-by: Jesse Gross Signed-off-by: David S. Miller