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.

Pavel Begunkov committed 3 months ago

Commit 3c8a5e21 parent 5a22bfd2 files · +57 −6Browse files

Showing the changes to include/uapi (1 of 2 files). Show all

Unified · Split

include/uapi/linux/io_uring/zcrx.h+7−0

@@ -116,6 +116,7 @@ enum zcrx_ctrl_op { · 115 unmodified lines
116	116	ZCRX_CTRL_FLUSH_RQ,
117	117	ZCRX_CTRL_EXPORT,
118	118	ZCRX_CTRL_ARM_NOTIFICATION,
	119	+ ZCRX_CTRL_ADD_AREA,
119	120
120	121	__ZCRX_CTRL_LAST,
121	122	};
@@ -134,6 +135,11 @@ struct zcrx_ctrl_arm_notif { · 12 unmodified lines
134	135	__u32 __resv[11];
135	136	};
136	137
	138	+struct zcrx_ctrl_add_area {
	139	+ __u64 area_ptr; /* pointer to struct io_uring_zcrx_area_reg */
	140	+ __u64 __resv[5];
	141	+};
	142	+
137	143	struct zcrx_ctrl {
138	144	__u32 zcrx_id;
139	145	__u32 op; /* see enum zcrx_ctrl_op */
@@ -143,6 +149,7 @@ struct zcrx_ctrl { · 3 unmodified lines
143	149	struct zcrx_ctrl_export zc_export;
144	150	struct zcrx_ctrl_flush_rq zc_flush;
145	151	struct zcrx_ctrl_arm_notif zc_arm_notif;
	152	+ struct zcrx_ctrl_add_area zc_area;
146	153	};
147	154	};
148	155