diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2026-03-23 12:43:54 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-04-01 10:21:12 -0600 |
| commit | 825f2764919fca61a88ab2f93dfdfd1d22566264 (patch) | |
| tree | 57b1cc4286753e923f406e9f850d9ba3ae6381f0 /include/uapi/linux/io_uring | |
| parent | 06fc3b6d388dfa9c3df62830e07be828324b99e3 (diff) | |
io_uring/zcrx: implement device-less mode for zcrx
Allow creating a zcrx instance without attaching it to a net device.
All data will be copied through the fallback path. The user is also
expected to use ZCRX_CTRL_FLUSH_RQ to handle overflows as it normally
should even with a netdev, but it becomes even more relevant as there
will likely be no one to automatically pick up buffers.
Apart from that, it follows the zcrx uapi for the I/O path, and is
useful for testing, experimentation, and potentially for the copy
receive path in the future if improved.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/674f8ad679c5a0bc79d538352b3042cf0999596e.1774261953.git.asml.silence@gmail.com
[axboe: fix spelling error in uapi header and commit message]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/io_uring')
| -rw-r--r-- | include/uapi/linux/io_uring/zcrx.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/uapi/linux/io_uring/zcrx.h b/include/uapi/linux/io_uring/zcrx.h index 3163a4b8aeb0..5ce02c7a6096 100644 --- a/include/uapi/linux/io_uring/zcrx.h +++ b/include/uapi/linux/io_uring/zcrx.h @@ -49,7 +49,14 @@ struct io_uring_zcrx_area_reg { }; enum zcrx_reg_flags { - ZCRX_REG_IMPORT = 1, + ZCRX_REG_IMPORT = 1, + + /* + * Register a zcrx instance without a net device. All data will be + * copied. The refill queue entries might not be automatically + * consumed and need to be flushed, see ZCRX_CTRL_FLUSH_RQ. + */ + ZCRX_REG_NODEV = 2, }; enum zcrx_features { |