From: Jens Axboe <axboe@kernel.dk>
Date: Sat, 3 Sep 2022 17:02:10 +0000 (-0600)
Subject: t/io_uring: enable support for registered buffers for passthrough
X-Git-Tag: fio-3.33~45
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=021ce718f5ae4bfd5f4e42290993578adb7c7bd5;p=fio.git

t/io_uring: enable support for registered buffers for passthrough

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/os/linux/io_uring.h b/os/linux/io_uring.h
index 6604e736..c7a24ad8 100644
--- a/os/linux/io_uring.h
+++ b/os/linux/io_uring.h
@@ -46,6 +46,7 @@ struct io_uring_sqe {
 		__u32		rename_flags;
 		__u32		unlink_flags;
 		__u32		hardlink_flags;
+		__u32		uring_cmd_flags;
 	};
 	__u64	user_data;	/* data to be passed back at completion time */
 	/* pack this to avoid bogus arm OABI complaints */
@@ -197,6 +198,13 @@ enum {
 	IORING_OP_LAST,
 };
 
+/*
+ * sqe->uring_cmd_flags
+ * IORING_URING_CMD_FIXED	use registered buffer; pass thig flag
+ *				along with setting sqe->buf_index.
+ */
+#define IORING_URING_CMD_FIXED	(1U << 0)
+
 /*
  * sqe->fsync_flags
  */
diff --git a/t/io_uring.c b/t/io_uring.c
index 3bce9e7e..b9353ac8 100644
--- a/t/io_uring.c
+++ b/t/io_uring.c
@@ -650,6 +650,10 @@ static void init_io_pt(struct submitter *s, unsigned index)
 	cmd->cdw12 = nlb;
 	cmd->addr = (unsigned long) s->iovecs[index].iov_base;
 	cmd->data_len = bs;
+	if (fixedbufs) {
+		sqe->uring_cmd_flags = IORING_URING_CMD_FIXED;
+		sqe->buf_index = index;
+	}
 	cmd->nsid = f->nsid;
 	cmd->opcode = 2;
 }