io_uring_cmd *cmd, unsigned int index,
 			 unsigned int issue_flags);
 #else
@@ -199,6 +202,15 @@ static inline int io_buffer_register_request(struct io_uring_cmd *cmd,
 {
 	return -EOPNOTSUPP;
 }
+static inline int io_buffer_register_bvec(struct io_uring_cmd *cmd,
+					  struct bio_vec *bvs,
+					  unsigned int nr_bvecs,
+					  unsigned int total_bytes, u8 dir,
+					  unsigned int index,
+					  unsigned int issue_flags)
+{
+	return -EOPNOTSUPP;
+}
 static inline int io_buffer_unregister(struct io_uring_cmd *cmd,
 				       unsigned int index,
 				       unsigned int issue_flags)
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 5a708cecba4a..32126c06f4c9 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -1020,6 +1020,33 @@ int io_buffer_register_request(struct io_uring_cmd *cmd, struct request *rq,
 }
 EXPORT_SYMBOL_GPL(io_buffer_register_request);
 
+int io_buffer_register_bvec(struct io_uring_cmd *cmd, struct bio_vec *bvs,
+			    unsigned int nr_bvecs, unsigned int total_bytes,
+			    u8 dir, unsigned int index,
+			    unsigned int issue_flags)
+{
+	struct io_ring_ctx *ctx = cmd_to_io_kiocb(cmd)->ctx;
+	struct io_mapped_ubuf *imu;
+	struct bio_vec *bvec;
+	int i;
+
+	io_ring_submit_lock(ctx, issue_flags);
+	imu = io_kernel_buffer_init(ctx, nr_bvecs, total_bytes, dir, NULL,
+				    NULL, index);
+	if (IS_ERR(imu)) {
+		io_ring_submit_unlock(ctx, issue_flags);
+		return PTR_ERR(imu);
+	}
+
+	bvec = imu->bvec;
+	for (i = 0; i < nr_bvecs; i++)
+		bvec[i] = bvs[i];
+
+	io_ring_submit_unlock(ctx, issue_flags);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(io_buffer_register_bvec);
+
 int io_buffer_unregister(struct io_uring_cmd *cmd, unsigned int index,
 			 unsigned int issue_flags)
 {
-- 
2.47.3[PATCH v3 23/25] io_uring/rsrc: add io_buffer_register_bvec()Joanne Koong <joannelkoong@gmail.com> undefinedmiklos@szeredi.hu, axboe@kernel.dk undefined undefined undefined undefined undefined undefined undefined undefinedžl„Ř@