Files
rockchip-kernel/include/linux
Toshiaki Makita 2539650fad xdp: Helpers for disabling napi_direct of xdp_return_frame
We need some mechanism to disable napi_direct on calling
xdp_return_frame_rx_napi() from some context.
When veth gets support of XDP_REDIRECT, it will redirects packets which
are redirected from other devices. On redirection veth will reuse
xdp_mem_info of the redirection source device to make return_frame work.
But in this case .ndo_xdp_xmit() called from veth redirection uses
xdp_mem_info which is not guarded by NAPI, because the .ndo_xdp_xmit()
is not called directly from the rxq which owns the xdp_mem_info.

This approach introduces a flag in bpf_redirect_info to indicate that
napi_direct should be disabled even when _rx_napi variant is used as
well as helper functions to use it.

A NAPI handler who wants to use this flag needs to call
xdp_set_return_frame_no_direct() before processing packets, and call
xdp_clear_return_frame_no_direct() after xdp_do_flush_map() before
exiting NAPI.

v4:
- Use bpf_redirect_info for storing the flag instead of xdp_mem_info to
  avoid per-frame copy cost.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-08-10 16:12:21 +02:00
..
2018-05-25 18:23:56 +02:00
2018-05-23 14:01:03 +02:00
2018-06-07 14:23:08 +01:00
2018-07-22 11:51:30 -07:00
2018-05-26 09:16:44 +02:00
2018-06-15 18:10:01 -03:00
2018-04-20 17:18:35 -07:00
2018-04-30 13:25:14 +01:00
2018-06-27 18:58:49 +03:00
2018-03-16 10:56:13 +01:00
2018-08-03 00:47:32 +02:00
2018-05-09 17:25:13 +02:00
2018-06-15 18:10:01 -03:00
2018-03-16 15:45:51 -07:00
2018-03-16 10:55:47 +01:00
2018-03-26 15:09:38 +02:00
2018-06-01 07:38:16 -06:00
2018-03-26 15:56:44 +02:00
2018-07-03 18:33:19 -04:00
2018-04-26 09:02:01 -06:00
2018-06-07 17:34:37 -07:00
2018-05-22 13:42:16 +02:00
2018-03-26 08:53:43 -06:00
2018-06-22 13:43:27 +09:00
2018-06-22 13:43:27 +09:00
2018-05-09 12:21:46 -05:00
2018-06-21 17:39:18 +02:00
2018-04-11 10:28:38 -07:00
2018-04-12 09:41:19 -07:00
2018-06-05 08:50:16 -04:00
2018-06-15 07:55:25 +09:00
2018-06-07 17:34:35 -07:00
2018-04-11 10:28:32 -07:00
2018-06-07 17:34:37 -07:00
2018-06-07 17:34:39 -07:00
2018-03-26 13:14:43 -04:00
2018-03-26 13:14:43 -04:00
2018-06-01 14:37:35 +02:00
2018-06-07 17:34:36 -07:00
2018-04-11 10:28:39 -07:00
2018-06-06 16:10:45 -05:00
2018-05-15 15:51:38 +01:00
2018-06-07 17:34:35 -07:00
2018-07-25 13:41:22 -07:00
2018-05-31 00:13:56 +08:00
2018-05-11 17:28:45 -07:00
2018-05-11 17:28:45 -07:00
2018-03-01 08:33:05 -07:00
2018-06-29 08:48:06 -06:00
2018-05-04 12:48:54 -07:00
2018-04-30 05:14:55 -07:00
2018-06-07 17:34:35 -07:00
2018-08-10 16:12:20 +02:00
2018-05-03 15:55:23 -07:00
2018-04-16 14:25:08 -06:00
2018-05-19 13:57:31 +02:00
2018-05-19 13:57:31 +02:00
2018-05-14 09:51:34 -04:00