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From: Pavel Begunkov <[email protected]>
To: [email protected], [email protected],
	[email protected]
Cc: "David S . Miller" <[email protected]>,
	Jakub Kicinski <[email protected]>,
	Jonathan Lemon <[email protected]>,
	Willem de Bruijn <[email protected]>,
	Jens Axboe <[email protected]>,
	[email protected], Pavel Begunkov <[email protected]>
Subject: [RFC net-next v3 23/29] io_uring: allow to pass addr into sendzc
Date: Tue, 28 Jun 2022 19:56:45 +0100	[thread overview]
Message-ID: <228d4841af5eeb9a4b73955136559f18cb7e43a0.1653992701.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

Allow to specify an address to zerocopy sends making it more like
sendto(2).

Signed-off-by: Pavel Begunkov <[email protected]>
---
 fs/io_uring.c                 | 16 +++++++++++++++-
 include/uapi/linux/io_uring.h |  2 +-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 838030477456..a1e9405a3f1b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -722,6 +722,8 @@ struct io_sendzc {
 	size_t				len;
 	u16				slot_idx;
 	int				msg_flags;
+	int				addr_len;
+	void __user			*addr;
 };
 
 struct io_open {
@@ -6572,7 +6574,7 @@ static int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
 	struct io_sendzc *zc = &req->msgzc;
 
-	if (READ_ONCE(sqe->ioprio) || READ_ONCE(sqe->addr2) || READ_ONCE(sqe->__pad2[0]))
+	if (READ_ONCE(sqe->ioprio) || READ_ONCE(sqe->__pad2[0]))
 		return -EINVAL;
 
 	zc->buf = u64_to_user_ptr(READ_ONCE(sqe->addr));
@@ -6581,6 +6583,9 @@ static int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	zc->slot_idx = READ_ONCE(sqe->notification_idx);
 	if (zc->msg_flags & MSG_DONTWAIT)
 		req->flags |= REQ_F_NOWAIT;
+	zc->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2));
+	zc->addr_len = READ_ONCE(sqe->addr_len);
+
 #ifdef CONFIG_COMPAT
 	if (req->ctx->compat)
 		zc->msg_flags |= MSG_CMSG_COMPAT;
@@ -6590,6 +6595,7 @@ static int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 
 static int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
 {
+	struct sockaddr_storage address;
 	struct io_ring_ctx *ctx = req->ctx;
 	struct io_sendzc *zc = &req->msgzc;
 	struct io_notif_slot *notif_slot;
@@ -6624,6 +6630,14 @@ static int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
 		return ret;
 	mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
 
+	if (zc->addr) {
+		ret = move_addr_to_kernel(zc->addr, zc->addr_len, &address);
+		if (unlikely(ret < 0))
+			return ret;
+		msg.msg_name = (struct sockaddr *)&address;
+		msg.msg_namelen = zc->addr_len;
+	}
+
 	msg_flags = zc->msg_flags | MSG_ZEROCOPY;
 	if (issue_flags & IO_URING_F_NONBLOCK)
 		msg_flags |= MSG_DONTWAIT;
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 6c6f20ae5a95..689aa1444cd4 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -63,7 +63,7 @@ struct io_uring_sqe {
 		__u32	file_index;
 		struct {
 			__u16	notification_idx;
-			__u16	__pad;
+			__u16	addr_len;
 		} __attribute__((packed));
 	};
 	union {
-- 
2.36.1


  parent reply	other threads:[~2022-06-28 19:01 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-28 18:56 [RFC net-next v3 00/29] io_uring zerocopy send Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 01/29] ipv4: avoid partial copy for zc Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 02/29] ipv6: " Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 03/29] skbuff: add SKBFL_DONT_ORPHAN flag Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 04/29] skbuff: carry external ubuf_info in msghdr Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 05/29] net: bvec specific path in zerocopy_sg_from_iter Pavel Begunkov
2022-06-28 20:06   ` Al Viro
2022-06-28 21:33     ` Pavel Begunkov
2022-06-28 22:52   ` David Ahern
2022-07-04 13:31     ` Pavel Begunkov
2022-07-05  2:28       ` David Ahern
2022-07-05 14:03         ` Pavel Begunkov
2022-07-05 22:09           ` Pavel Begunkov
2022-07-06 15:11             ` David Ahern
2022-06-28 18:56 ` [RFC net-next v3 06/29] net: optimise bvec-based zc page referencing Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 07/29] net: don't track pfmemalloc for managed frags Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 08/29] skbuff: don't mix ubuf_info of different types Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 09/29] ipv4/udp: support zc with managed data Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 10/29] ipv6/udp: " Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 11/29] tcp: " Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 12/29] tcp: kill extra io_uring's uarg refcounting Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 13/29] net: let callers provide extra ubuf_info refs Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 14/29] io_uring: opcode independent fixed buf import Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 15/29] io_uring: add zc notification infrastructure Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 16/29] io_uring: cache struct io_notif Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 17/29] io_uring: complete notifiers in tw Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 18/29] io_uring: add notification slot registration Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 19/29] io_uring: rename IORING_OP_FILES_UPDATE Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 20/29] io_uring: add zc notification flush requests Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 21/29] io_uring: wire send zc request type Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 22/29] io_uring: account locked pages for non-fixed zc Pavel Begunkov
2022-06-28 18:56 ` Pavel Begunkov [this message]
2022-06-29  7:42   ` [RFC net-next v3 23/29] io_uring: allow to pass addr into sendzc Stefan Metzmacher
2022-06-29  9:53     ` Pavel Begunkov
2022-08-13  8:45       ` Stefan Metzmacher
2022-08-15  9:46         ` Pavel Begunkov
2022-08-15 11:40           ` Stefan Metzmacher
2022-08-15 12:19             ` Pavel Begunkov
2022-08-15 13:30               ` Stefan Metzmacher
2022-08-15 14:09                 ` Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 24/29] io_uring: add rsrc referencing for notifiers Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 25/29] io_uring: sendzc with fixed buffers Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 26/29] io_uring: flush notifiers after sendzc Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 27/29] io_uring: allow to override zc tag on flush Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 28/29] io_uring: batch submission notif referencing Pavel Begunkov
2022-06-28 18:56 ` [RFC net-next v3 29/29] selftests/io_uring: test zerocopy send Pavel Begunkov
2022-06-28 19:03 ` [RFC net-next v3 00/29] io_uring " Pavel Begunkov

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