linux-kernel - [PATCH] io_uring: add missing IORING_MAP_OFF_ZCRX_REGION in io_uring

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Message-ID: <20250221085933.26034-1-minhquangbui99@gmail.com>
Date: Fri, 21 Feb 2025 15:59:33 +0700
From: Bui Quang Minh <minhquangbui99@...il.com>
To: io-uring@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>,
	Pavel Begunkov <asml.silence@...il.com>,
	David Wei <dw@...idwei.uk>,
	linux-kernel@...r.kernel.org,
	Bui Quang Minh <minhquangbui99@...il.com>
Subject: [PATCH] io_uring: add missing IORING_MAP_OFF_ZCRX_REGION in io_uring_mmap

Allow user to mmap the kernel allocated zerocopy-rx refill queue.

Signed-off-by: Bui Quang Minh <minhquangbui99@...il.com>
---
 io_uring/memmap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/io_uring/memmap.c b/io_uring/memmap.c
index 361134544427..76fcc79656b0 100644
--- a/io_uring/memmap.c
+++ b/io_uring/memmap.c
@@ -271,6 +271,8 @@ static struct io_mapped_region *io_mmap_get_region(struct io_ring_ctx *ctx,
 		return io_pbuf_get_region(ctx, bgid);
 	case IORING_MAP_OFF_PARAM_REGION:
 		return &ctx->param_region;
+	case IORING_MAP_OFF_ZCRX_REGION:
+		return &ctx->zcrx_region;
 	}
 	return NULL;
 }
-- 
2.43.0