user/sven/linux.git/include/linux/netdev_features.h, branch v4.14.181

net: Add header for usage of fls64()

2019-02-23T08:06:43Z

[ Upstream commit 8681ef1f3d295bd3600315325f3b3396d76d02f6 ] Fixes: 3b89ea9c5902 ("net: Fix for_each_netdev_feature on Big endian") Suggested-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

net: Fix for_each_netdev_feature on Big endian

2019-02-23T08:06:43Z

[ Upstream commit 3b89ea9c5902acccdbbdec307c85edd1bf52515e ] The features attribute is of type u64 and stored in the native endianes on the system. The for_each_set_bit() macro takes a pointer to a 32 bit array and goes over the bits in this area. On little Endian systems this also works with an u64 as the most significant bit is on the highest address, but on big endian the words are swapped. When we expect bit 15 here we get bit 47 (15 + 32). This patch converts it more or less to its own for_each_set_bit() implementation which works on 64 bit integers directly. This is then completely in host endianness and should work like expected. Fixes: fd867d51f ("net/core: generic support for disabling netdev features down stack") Signed-off-by: Hauke Mehrtens Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

net: accept UFO datagrams from tuntap and packet

2017-12-17T14:07:58Z

[ Upstream commit 0c19f846d582af919db66a5914a0189f9f92c936 ] Tuntap and similar devices can inject GSO packets. Accept type VIRTIO_NET_HDR_GSO_UDP, even though not generating UFO natively. Processes are expected to use feature negotiation such as TUNSETOFFLOAD to detect supported offload types and refrain from injecting other packets. This process breaks down with live migration: guest kernels do not renegotiate flags, so destination hosts need to expose all features that the source host does. Partially revert the UFO removal from 182e0b6b5846~1..d9d30adf5677. This patch introduces nearly(*) no new code to simplify verification. It brings back verbatim tuntap UFO negotiation, VIRTIO_NET_HDR_GSO_UDP insertion and software UFO segmentation. It does not reinstate protocol stack support, hardware offload (NETIF_F_UFO), SKB_GSO_UDP tunneling in SKB_GSO_SOFTWARE or reception of VIRTIO_NET_HDR_GSO_UDP packets in tuntap. To support SKB_GSO_UDP reappearing in the stack, also reinstate logic in act_csum and openvswitch. Achieve equivalence with v4.13 HEAD by squashing in commit 939912216fa8 ("net: skb_needs_check() removes CHECKSUM_UNNECESSARY check for tx.") and reverting commit 8d63bee643f1 ("net: avoid skb_warn_bad_offload false positives on UFO"). (*) To avoid having to bring back skb_shinfo(skb)->ip6_frag_id, ipv6_proxy_select_ident is changed to return a __be32 and this is assigned directly to the frag_hdr. Also, SKB_GSO_UDP is inserted at the end of the enum to minimize code churn. Tested Booted a v4.13 guest kernel with QEMU. On a host kernel before this patch `ethtool -k eth0` shows UFO disabled. After the patch, it is enabled, same as on a v4.13 host kernel. A UFO packet sent from the guest appears on the tap device: host: nc -l -p -u 8000 & tcpdump -n -i tap0 guest: dd if=/dev/zero of=payload.txt bs=1 count=2000 nc -u 192.16.1.1 8000 < payload.txt Direct tap to tap transmission of VIRTIO_NET_HDR_GSO_UDP succeeds, packets arriving fragmented: ./with_tap_pair.sh ./tap_send_ufo tap0 tap1 (from https://github.com/wdebruij/kerneltools/tree/master/tests) Changes v1 -> v2 - simplified set_offload change (review comment) - documented test procedure Link: http://lkml.kernel.org/r/ Fixes: fb652fdfe837 ("macvlan/macvtap: Remove NETIF_F_UFO advertisement.") Reported-by: Michal Kubecek Signed-off-by: Willem de Bruijn Acked-by: Jason Wang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

net: add new netdevice feature for offload of RX port for UDP tunnels

2017-07-24T20:52:59Z

This adds a new netdevice feature, so that the offloading of RX port for UDP tunnels can be disabled by the administrator on some netdevices, using the "rx-udp_tunnel-port-offload" feature in ethtool. This feature is set for all devices that provide ndo_udp_tunnel_add. Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller

net: Kill NETIF_F_UFO and SKB_GSO_UDP.

2017-07-17T16:52:58Z

No longer used. Signed-off-by: David S. Miller

net: Add ESP offload features

2017-04-14T08:05:36Z

This patch adds netdev features to configure IPsec offloads. Signed-off-by: Steffen Klassert

net: remove support for per driver ndo_busy_poll()

2017-02-03T22:28:29Z

We added generic support for busy polling in NAPI layer in linux-4.5 No network driver uses ndo_busy_poll() anymore, we can get rid of the pointer in struct net_device_ops, and its use in sk_busy_loop() Saves NETIF_F_BUSY_POLL features bit. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller

sctp: Add GSO support

2016-06-03T23:37:21Z

SCTP has this pecualiarity that its packets cannot be just segmented to (P)MTU. Its chunks must be contained in IP segments, padding respected. So we can't just generate a big skb, set gso_size to the fragmentation point and deliver it to IP layer. This patch takes a different approach. SCTP will now build a skb as it would be if it was received using GRO. That is, there will be a cover skb with protocol headers and children ones containing the actual segments, already segmented to a way that respects SCTP RFCs. With that, we can tell skb_segment() to just split based on frag_list, trusting its sizes are already in accordance. This way SCTP can benefit from GSO and instead of passing several packets through the stack, it can pass a single large packet. v2: - Added support for receiving GSO frames, as requested by Dave Miller. - Clear skb->cb if packet is GSO (otherwise it's not used by SCTP) - Added heuristics similar to what we have in TCP for not generating single GSO packets that fills cwnd. v3: - consider sctphdr size in skb_gso_transport_seglen() - rebased due to 5c7cdf339af5 ("gso: Remove arbitrary checks for unsupported GSO") Signed-off-by: Marcelo Ricardo Leitner Tested-by: Xin Long Signed-off-by: David S. Miller

net: define gso types for IPx over IPv4 and IPv6

2016-05-20T22:03:15Z

This patch defines two new GSO definitions SKB_GSO_IPXIP4 and SKB_GSO_IPXIP6 along with corresponding NETIF_F_GSO_IPXIP4 and NETIF_F_GSO_IPXIP6. These are used to described IP in IP tunnel and what the outer protocol is. The inner protocol can be deduced from other GSO types (e.g. SKB_GSO_TCPV4 and SKB_GSO_TCPV6). The GSO types of SKB_GSO_IPIP and SKB_GSO_SIT are removed (these are both instances of SKB_GSO_IPXIP4). SKB_GSO_IPXIP6 will be used when support for GSO with IP encapsulation over IPv6 is added. Signed-off-by: Tom Herbert Acked-by: Jeff Kirsher Signed-off-by: David S. Miller

netdev_features: Fold NETIF_F_ALL_TSO into NETIF_F_GSO_SOFTWARE

2016-04-21T18:14:58Z

This patch folds NETIF_F_ALL_TSO into the bitmask for NETIF_F_GSO_SOFTWARE. The idea is to avoid duplication of defines since the only difference between the two was the GSO_UDP bit. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller