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io_uring/zcrx: add support for IORING_SETUP_CQE_MIXED 

zcrx currently requires the ring to be set up with fixed 32b CQEs,
allow it to use IORING_SETUP_CQE_MIXED as well.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2025-08-07 14:25:50 -06:00
parent 1e81bf1414
commit c986f7586b
2 changed files with 8 additions and 4 deletions
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2
Documentation/networking/iou-zcrx.rst
View File

@ -75,7 +75,7 @@ Create an io_uring instance with the following required setup flags::
IORING_SETUP_SINGLE_ISSUER
IORING_SETUP_DEFER_TASKRUN
IORING_SETUP_CQE32
IORING_SETUP_CQE32 or IORING_SETUP_CQE_MIXED
Create memory area
------------------

10
io_uring/zcrx.c
View File

@ -554,8 +554,9 @@ int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
return -EPERM;
/* mandatory io_uring features for zc rx */
if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN &&
ctx->flags & IORING_SETUP_CQE32))
if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN))
return -EINVAL;
if (!(ctx->flags & (IORING_SETUP_CQE32|IORING_SETUP_CQE_MIXED)))
return -EINVAL;
if (copy_from_user(&reg, arg, sizeof(reg)))
return -EFAULT;
@ -920,17 +921,20 @@ static const struct memory_provider_ops io_uring_pp_zc_ops = {
static bool io_zcrx_queue_cqe(struct io_kiocb *req, struct net_iov *niov,
struct io_zcrx_ifq *ifq, int off, int len)
{
struct io_ring_ctx *ctx = req->ctx;
struct io_uring_zcrx_cqe *rcqe;
struct io_zcrx_area *area;
struct io_uring_cqe *cqe;
u64 offset;
if (!io_defer_get_uncommited_cqe(req->ctx, &cqe))
if (!io_defer_get_uncommited_cqe(ctx, &cqe))
return false;
cqe->user_data = req->cqe.user_data;
cqe->res = len;
cqe->flags = IORING_CQE_F_MORE;
if (ctx->flags & IORING_SETUP_CQE_MIXED)
cqe->flags |= IORING_CQE_F_32;
area = io_zcrx_iov_to_area(niov);
offset = off + (net_iov_idx(niov) << PAGE_SHIFT);