[PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Pavel Begunkov]

Enable IORING_SEND_VECTORIZED with registered buffers for
IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
to differentiate if the vectorised version is expected.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/net.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/io_uring/net.c b/io_uring/net.c
index 3e6112beea88..3e68593e8164 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -375,10 +375,13 @@ static int io_send_setup(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		kmsg->msg.msg_namelen = addr_len;
 	}
 	if (sr->flags & IORING_RECVSEND_FIXED_BUF) {
-		if (sr->flags & IORING_SEND_VECTORIZED)
-			return -EINVAL;
-		req->flags |= REQ_F_IMPORT_BUFFER;
-		return 0;
+		if (!(sr->flags & IORING_SEND_VECTORIZED)) {
+			req->flags |= REQ_F_IMPORT_BUFFER;
+			return 0;
+		}
+
+		kmsg->msg.msg_iter.nr_segs = sr->len;
+		return io_prep_reg_iovec(req, &kmsg->vec, sr->buf, sr->len);
 	}
 	if (req->flags & REQ_F_BUFFER_SELECT)
 		return 0;
@@ -396,6 +399,7 @@ static int io_sendmsg_setup(struct io_kiocb *req, const struct io_uring_sqe *sqe
 	struct user_msghdr msg;
 	int ret;
 
+	sr->flags |= IORING_SEND_VECTORIZED;
 	sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
 	ret = io_msg_copy_hdr(req, kmsg, &msg, ITER_SOURCE, NULL);
 	if (unlikely(ret))
@@ -1453,7 +1457,7 @@ static int io_send_zc_import(struct io_kiocb *req,
 
 	notif->buf_index = req->buf_index;
 
-	if (req->opcode == IORING_OP_SEND_ZC) {
+	if (!(sr->flags & IORING_SEND_VECTORIZED)) {
 		ret = io_import_reg_buf(notif, &kmsg->msg.msg_iter,
 					(u64)(uintptr_t)sr->buf, sr->len,
 					ITER_SOURCE, issue_flags);
-- 
2.53.0

Re: [PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Pavel Begunkov]

On 3/3/26 12:32, Pavel Begunkov wrote:
> Enable IORING_SEND_VECTORIZED with registered buffers for
> IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
> to differentiate if the vectorised version is expected.

Any comments for this patch?

-- 
Pavel Begunkov

Re: [PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Jens Axboe]

On 3/9/26 7:17 AM, Pavel Begunkov wrote:
> On 3/3/26 12:32, Pavel Begunkov wrote:
>> Enable IORING_SEND_VECTORIZED with registered buffers for
>> IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
>> to differentiate if the vectorised version is expected.
> 
> Any comments for this patch?

Looks fine, but it depends on the patch that just landed in -rc3, so
need that first for staging for 7.1.

-- 
Jens Axboe

Re: [PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Jens Axboe]

On Tue, 03 Mar 2026 12:32:19 +0000, Pavel Begunkov wrote:
> Enable IORING_SEND_VECTORIZED with registered buffers for
> IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
> to differentiate if the vectorised version is expected.
> 
> 

Applied, thanks!

[1/1] io_uring/net: allow vectorised regbuf send zc
      commit: dce00c83035b880deebf7b2f0a204f740cb90d64

Best regards,
-- 
Jens Axboe

Re: [PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Pavel Begunkov]

On 3/9/26 13:21, Jens Axboe wrote:
> On 3/9/26 7:17 AM, Pavel Begunkov wrote:
>> On 3/3/26 12:32, Pavel Begunkov wrote:
>>> Enable IORING_SEND_VECTORIZED with registered buffers for
>>> IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
>>> to differentiate if the vectorised version is expected.
>>
>> Any comments for this patch?
> 
> Looks fine, but it depends on the patch that just landed in -rc3, so
> need that first for staging for 7.1.

Ah, forgot about that. Let me know if I need to do anything
here, otherwise I assume you'll be considering it after you
rebase for-next on top of rc3

-- 
Pavel Begunkov

Re: [PATCH 1/1] io_uring/net: allow vectorised regbuf send zc

[Jens Axboe]

On 3/9/26 7:26 AM, Pavel Begunkov wrote:
> On 3/9/26 13:21, Jens Axboe wrote:
>> On 3/9/26 7:17 AM, Pavel Begunkov wrote:
>>> On 3/3/26 12:32, Pavel Begunkov wrote:
>>>> Enable IORING_SEND_VECTORIZED with registered buffers for
>>>> IORING_OP_SEND_ZC. Set IORING_SEND_VECTORIZED for all msg send requests
>>>> to differentiate if the vectorised version is expected.
>>>
>>> Any comments for this patch?
>>
>> Looks fine, but it depends on the patch that just landed in -rc3, so
>> need that first for staging for 7.1.
> 
> Ah, forgot about that. Let me know if I need to do anything
> here, otherwise I assume you'll be considering it after you
> rebase for-next on top of rc3

Yep, I applied it now, did the rebase for -rc3 just now and
pushed them out.

-- 
Jens Axboe