user/sven/linux.git/include/linux/if_tun.h, branch v4.19.281

tun: convert to use generic xdp_frame and xdp_return_frame API

2018-04-17T14:50:28Z

The tuntap driver invented it's own driver specific way of queuing XDP packets, by storing the xdp_buff information in the top of the XDP frame data. Convert it over to use the more generic xdp_frame structure. The main problem with the in-driver method is that the xdp_rxq_info pointer cannot be trused/used when dequeueing the frame. V3: Remove check based on feedback from Jason Signed-off-by: Jesper Dangaard Brouer Signed-off-by: David S. Miller

vhost_net: examine pointer types during un-producing

2018-03-09T17:02:59Z

After commit fc72d1d54dd9 ("tuntap: XDP transmission"), we can actually queueing XDP pointers in the pointer ring, so we should examine the pointer type before freeing the pointer. Fixes: fc72d1d54dd9 ("tuntap: XDP transmission") Reported-by: Michael S. Tsirkin Acked-by: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: David S. Miller

tuntap: fix for "tuntap: XDP transmission"

2018-01-10T20:52:49Z

Fixes: fc72d1d54dd9 ("tuntap: XDP transmission") Signed-off-by: Stephen Rothwell Acked-by: Jason Wang Signed-off-by: David S. Miller

tuntap: XDP transmission

2018-01-09T15:57:08Z

This patch implements XDP transmission for TAP. Since we can't create new queues for TAP during XDP set, exist ptr_ring was reused for queuing XDP buffers. To differ xdp_buff from sk_buff, TUN_XDP_FLAG (0x1UL) was encoded into lowest bit of xpd_buff pointer during ptr_ring_produce, and was decoded during consuming. XDP metadata was stored in the headroom of the packet which should work in most of cases since driver usually reserve enough headroom. Very minor changes were done for vhost_net: it just need to peek the length depends on the type of pointer. Tests were done on two Intel E5-2630 2.40GHz machines connected back to back through two 82599ES. Traffic were generated/received through MoonGen/testpmd(rxonly). It reports ~20% improvements when xdp_redirect_map is doing redirection from ixgbe to TAP (from 2.50Mpps to 3.05Mpps) Cc: Jesper Dangaard Brouer Signed-off-by: Jason Wang Signed-off-by: David S. Miller

tun/tap: use ptr_ring instead of skb_array

2018-01-09T15:56:10Z

This patch switches to use ptr_ring instead of skb_array. This will be used to enqueue different types of pointers by encoding type into lower bits. Signed-off-by: Jason Wang Signed-off-by: David S. Miller

tun: export skb_array

2017-05-18T14:07:40Z

This patch exports skb_array through tun_get_skb_array(). Caller can then manipulate skb array directly. Signed-off-by: Jason Wang Signed-off-by: David S. Miller

UAPI: (Scripted) Disintegrate include/linux

2012-10-13T09:46:48Z

Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Michael Kerrisk Acked-by: Paul E. McKenney Acked-by: Dave Jones

tun: add ioctl to modify vnet header size

2010-05-03T09:33:13Z

virtio added mergeable buffers mode where 2 bytes of extra info is put after vnet header but before actual data (tun does not need this data). In hindsight, it would have been better to add the new info *before* the packet: as it is, users need a lot of tricky code to skip the extra 2 bytes in the middle of the iovec, and in fact applications seem to get it wrong, and only work with specific iovec layout. The fact we might need to split iovec also means we might in theory overflow iovec max size. This patch adds a simpler way for applications to handle this, and future proofs the interface against further extensions, by making the size of the virtio net header configurable from userspace. As a result, tun driver will simply skip the extra 2 bytes on both input and output. Signed-off-by: Michael S. Tsirkin Acked-by: David S. Miller

tun: socket filter support

2010-02-18T00:35:17Z

This patch adds Linux Socket Filter support to tun driver. Signed-off-by: Michael S. Tsirkin Signed-off-by: David S. Miller

tun: export underlying socket

2010-01-15T09:43:28Z

Tun device looks similar to a packet socket in that both pass complete frames from/to userspace. This patch fills in enough fields in the socket underlying tun driver to support sendmsg/recvmsg operations, and message flags MSG_TRUNC and MSG_DONTWAIT, and exports access to this socket to modules. Regular read/write behaviour is unchanged. This way, code using raw sockets to inject packets into a physical device, can support injecting packets into host network stack almost without modification. First user of this interface will be vhost virtualization accelerator. Signed-off-by: Michael S. Tsirkin Acked-by: Herbert Xu Acked-by: David S. Miller Signed-off-by: David S. Miller