From: Jonathan Lemon <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Subject: [PATCH v1 11/15] io_uring: Define the zctap iov[] returned to the user.
Date: Mon, 7 Nov 2022 21:05:17 -0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
When performing a ZC receive, instead of returning data directly
to the user, an iov[] structure is returned referencing the data
in user space.
The application locates the base address of the data by performing
address computations on bgid:bid. The off/len applies to the base
address, resulting in the data segment.
The bgid:bid identifying the buffer should later be placed in the
ifq's fill ring, which returns the buffer back to the kernel.
Signed-off-by: Jonathan Lemon <[email protected]>
---
include/uapi/linux/io_uring.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index f65543595d71..88f01bda12be 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -681,6 +681,14 @@ struct io_uring_ifq_req {
__u16 resv[2];
};
+struct io_uring_zctap_iov {
+ __u32 off;
+ __u32 len;
+ __u16 bgid;
+ __u16 bid;
+ __u16 resv[2];
+};
+
#ifdef __cplusplus
}
#endif
--
2.30.2
next prev parent reply other threads:[~2022-11-08 5:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-08 5:05 [PATCH v1 00/15] zero-copy RX for io_uring Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 01/15] io_uring: add zctap ifq definition Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 02/15] netdevice: add SETUP_ZCTAP to the netdev_bpf structure Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 03/15] io_uring: add register ifq opcode Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 04/15] io_uring: create a zctap region for a mapped buffer Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 05/15] io_uring: mark pages in ifq region with zctap information Jonathan Lemon
2022-11-16 8:12 ` Christoph Hellwig
2022-11-17 20:48 ` Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 06/15] io_uring: Provide driver API for zctap packet buffers Jonathan Lemon
2022-11-16 8:17 ` Christoph Hellwig
2022-11-17 21:01 ` Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 07/15] io_uring: Allocate zctap device buffers and dma map them Jonathan Lemon
2022-11-16 8:15 ` Christoph Hellwig
2022-11-17 20:51 ` Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 08/15] io_uring: Add zctap buffer get/put functions and refcounting Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 09/15] skbuff: Introduce SKBFL_FIXED_FRAG and skb_fixed() Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 10/15] io_uring: Allocate a uarg for use by the ifq RX Jonathan Lemon
2022-11-08 5:05 ` Jonathan Lemon [this message]
2022-11-08 5:05 ` [PATCH v1 12/15] io_uring: add OP_RECV_ZC command Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 13/15] io_uring: Make remove_ifq_region a delayed work call Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 14/15] io_uring: Add a buffer caching mechanism for zctap Jonathan Lemon
2022-11-08 5:05 ` [PATCH v1 15/15] io_uring: Notify the application as the fillq is drained Jonathan Lemon
2022-11-09 6:37 ` [PATCH v1 00/15] zero-copy RX for io_uring Dust Li
2022-11-09 15:27 ` Jonathan Lemon
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