From 3c8a5e271594f6ba6d2af40f229cbcd0bcb08c06 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 7 Aug 2026 14:19:34 +0100 Subject: io_uring/zcrx: add dynamic area provisioning It's not always possible for the user to predict during registration how much memory zcrx will need to sustain the traffic. Allow to dynamically add more areas with a new ctrl code ZCRX_CTRL_ADD_AREA. Signed-off-by: Pavel Begunkov Link: https://patch.msgid.link/43495ca686713b3f0014c9f47c4c0276d704da4d.1786108672.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- include/uapi/linux/io_uring/zcrx.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/io_uring/zcrx.h b/include/uapi/linux/io_uring/zcrx.h index 15c05c45ce36..08cdb173b04b 100644 --- a/include/uapi/linux/io_uring/zcrx.h +++ b/include/uapi/linux/io_uring/zcrx.h @@ -116,6 +116,7 @@ enum zcrx_ctrl_op { ZCRX_CTRL_FLUSH_RQ, ZCRX_CTRL_EXPORT, ZCRX_CTRL_ARM_NOTIFICATION, + ZCRX_CTRL_ADD_AREA, __ZCRX_CTRL_LAST, }; @@ -134,6 +135,11 @@ struct zcrx_ctrl_arm_notif { __u32 __resv[11]; }; +struct zcrx_ctrl_add_area { + __u64 area_ptr; /* pointer to struct io_uring_zcrx_area_reg */ + __u64 __resv[5]; +}; + struct zcrx_ctrl { __u32 zcrx_id; __u32 op; /* see enum zcrx_ctrl_op */ @@ -143,6 +149,7 @@ struct zcrx_ctrl { struct zcrx_ctrl_export zc_export; struct zcrx_ctrl_flush_rq zc_flush; struct zcrx_ctrl_arm_notif zc_arm_notif; + struct zcrx_ctrl_add_area zc_area; }; }; -- cgit v1.2.3