kernel/linux.git/drivers/net/veth.c, branch v5.9.12

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva

bpf, xdp: Remove XDP_QUERY_PROG and XDP_QUERY_PROG_HW XDP commands

2020-07-26T03:37:02+00:00

Now that BPF program/link management is centralized in generic net_device code, kernel code never queries program id from drivers, so XDP_QUERY_PROG/XDP_QUERY_PROG_HW commands are unnecessary. This patch removes all the implementations of those commands in kernel, along the xdp_attachment_query(). This patch was compile-tested on allyesconfig. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200722064603.3350758-10-andriin@fb.com

xdp: Rename convert_to_xdp_frame in xdp_convert_buff_to_frame

2020-06-01T22:02:53+00:00

In order to use standard 'xdp' prefix, rename convert_to_xdp_frame utility routine in xdp_convert_buff_to_frame and replace all the occurrences Signed-off-by: Lorenzo Bianconi Signed-off-by: Alexei Starovoitov Acked-by: Jesper Dangaard Brouer Link: https://lore.kernel.org/bpf/6344f739be0d1a08ab2b9607584c4d5478c8c083.1590698295.git.lorenzo@kernel.org

xdp: Introduce xdp_convert_frame_to_buff utility routine

2020-06-01T22:02:53+00:00

Introduce xdp_convert_frame_to_buff utility routine to initialize xdp_buff fields from xdp_frames ones. Rely on xdp_convert_frame_to_buff in veth xdp code. Suggested-by: Jesper Dangaard Brouer Signed-off-by: Lorenzo Bianconi Signed-off-by: Alexei Starovoitov Acked-by: Jesper Dangaard Brouer Link: https://lore.kernel.org/bpf/87acf133073c4b2d4cbb8097e8c2480c0a0fac32.1590698295.git.lorenzo@kernel.org

veth: Xdp using frame_sz in veth driver

2020-05-15T04:21:54+00:00

The veth driver can run XDP in "native" mode in it's own NAPI handler, and since commit 9fc8d518d9d5 ("veth: Handle xdp_frames in xdp napi ring") packets can come in two forms either xdp_frame or skb, calling respectively veth_xdp_rcv_one() or veth_xdp_rcv_skb(). For packets to arrive in xdp_frame format, they will have been redirected from an XDP native driver. In case of XDP_PASS or no XDP-prog attached, the veth driver will allocate and create an SKB. The current code in veth_xdp_rcv_one() xdp_frame case, had to guess the frame truesize of the incoming xdp_frame, when using veth_build_skb(). With xdp_frame->frame_sz this is not longer necessary. Calculating the frame_sz in veth_xdp_rcv_skb() skb case, is done similar to the XDP-generic handling code in net/core/dev.c. Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Alexei Starovoitov Reviewed-by: Lorenzo Bianconi Acked-by: Toke Høiland-Jørgensen Acked-by: Toshiaki Makita Link: https://lore.kernel.org/bpf/158945338840.97035.935897116345700902.stgit@firesoul

veth: Adjust hard_start offset on redirect XDP frames

2020-05-15T04:21:54+00:00

When native XDP redirect into a veth device, the frame arrives in the xdp_frame structure. It is then processed in veth_xdp_rcv_one(), which can run a new XDP bpf_prog on the packet. Doing so requires converting xdp_frame to xdp_buff, but the tricky part is that xdp_frame memory area is located in the top (data_hard_start) memory area that xdp_buff will point into. The current code tried to protect the xdp_frame area, by assigning xdp_buff.data_hard_start past this memory. This results in 32 bytes less headroom to expand into via BPF-helper bpf_xdp_adjust_head(). This protect step is actually not needed, because BPF-helper bpf_xdp_adjust_head() already reserve this area, and don't allow BPF-prog to expand into it. Thus, it is safe to point data_hard_start directly at xdp_frame memory area. Fixes: 9fc8d518d9d5 ("veth: Handle xdp_frames in xdp napi ring") Reported-by: Mao Wenan Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Alexei Starovoitov Acked-by: Toshiaki Makita Acked-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/bpf/158945338331.97035.5923525383710752178.stgit@firesoul

veth: rely on peer veth_rq for ndo_xdp_xmit accounting

2020-03-27T02:35:13+00:00

Rely on 'remote' veth_rq to account ndo_xdp_xmit ethtool counters. Move XDP_TX accounting to veth_xdp_flush_bq routine. Remove 'rx' prefix in rx xdp ethool counters Signed-off-by: Lorenzo Bianconi Acked-by: Toshiaki Makita Signed-off-by: David S. Miller

veth: rely on veth_rq in veth_xdp_flush_bq signature

2020-03-27T02:35:13+00:00

Substitute net_device point with veth_rq one in veth_xdp_flush_bq, veth_xdp_flush and veth_xdp_tx signature. This is a preliminary patch to account xdp_xmit counter on 'receiving' veth_rq Acked-by: Toshiaki Makita Signed-off-by: Lorenzo Bianconi Signed-off-by: David S. Miller

veth: remove atomic64_add from veth_xdp_xmit hotpath

2020-03-20T04:24:59+00:00

Remove atomic64_add from veth_xdp_xmit hotpath and rely on xdp_xmit_err/xdp_tx_err counters Signed-off-by: Lorenzo Bianconi Signed-off-by: David S. Miller

veth: introduce more xdp counters

2020-03-20T04:24:58+00:00

Introduce xdp_xmit counter in order to distinguish between XDP_TX and ndo_xdp_xmit stats. Introduce the following ethtool counters: - rx_xdp_tx - rx_xdp_tx_errors - tx_xdp_xmit - tx_xdp_xmit_errors - rx_xdp_redirect Signed-off-by: Lorenzo Bianconi Signed-off-by: David S. Miller