diff --git a/lib/bdev/bdev.c b/lib/bdev/bdev.c
index 65554c632..d2b1d5f5e 100644
--- a/lib/bdev/bdev.c
+++ b/lib/bdev/bdev.c
@@ -2921,6 +2921,55 @@ bdev_io_submit(struct spdk_bdev_io *bdev_io)
 	}
 }
 
+static inline void
+_bdev_io_copy_ext_opts(struct spdk_bdev_io *bdev_io, struct spdk_bdev_ext_io_opts *opts)
+{
+	struct spdk_bdev_ext_io_opts *opts_copy = &bdev_io->internal.ext_opts_copy;
+
+	memcpy(opts_copy, opts, opts->size);
+	bdev_io->internal.ext_opts_copy.metadata = bdev_io->u.bdev.md_buf;
+	/* Save pointer to the copied ext_opts which will be used by bdev modules */
+	bdev_io->u.bdev.ext_opts = opts_copy;
+}
+
+static inline void
+_bdev_io_ext_use_bounce_buffer(struct spdk_bdev_io *bdev_io)
+{
+	/* bdev doesn't support memory domains, thereby buffers in this IO request can't
+	 * be accessed directly. It is needed to allocate buffers before issuing IO operation.
+	 * For write operation we need to pull buffers from memory domain before submitting IO.
+	 * Once read operation completes, we need to use memory_domain push functionality to
+	 * update data in original memory domain IO buffer
+	 * This IO request will go through a regular IO flow, so clear memory domains pointers in
+	 * the copied ext_opts */
+	bdev_io->internal.ext_opts_copy.memory_domain = NULL;
+	bdev_io->internal.ext_opts_copy.memory_domain_ctx = NULL;
+	_bdev_memory_domain_io_get_buf(bdev_io, _bdev_memory_domain_get_io_cb,
+				       bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
+}
+
+static inline void
+_bdev_io_submit_ext(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io,
+		    struct spdk_bdev_ext_io_opts *opts, bool copy_opts)
+{
+	if (opts) {
+		bool use_pull_push = opts->memory_domain && !desc->memory_domains_supported;
+		assert(opts->size <= sizeof(*opts));
+		/*
+		 * copy if size is smaller than opts struct to avoid having to check size
+		 * on every access to bdev_io->u.bdev.ext_opts
+		 */
+		if (copy_opts || use_pull_push) {
+			_bdev_io_copy_ext_opts(bdev_io, opts);
+			if (use_pull_push) {
+				_bdev_io_ext_use_bounce_buffer(bdev_io);
+				return;
+			}
+		}
+	}
+	bdev_io_submit(bdev_io);
+}
+
 static void
 bdev_io_submit_reset(struct spdk_bdev_io *bdev_io)
 {
@@ -4091,33 +4140,6 @@ _bdev_io_check_md_buf(const struct iovec *iovs, const void *md_buf)
 	return _is_buf_allocated(iovs) == (md_buf != NULL);
 }
 
-static inline void
-_bdev_io_copy_ext_opts(struct spdk_bdev_io *bdev_io, struct spdk_bdev_ext_io_opts *opts)
-{
-	struct spdk_bdev_ext_io_opts *opts_copy = &bdev_io->internal.ext_opts_copy;
-
-	memcpy(opts_copy, opts, opts->size);
-	bdev_io->internal.ext_opts_copy.metadata = bdev_io->u.bdev.md_buf;
-	/* Save pointer to the copied ext_opts which will be used by bdev modules */
-	bdev_io->u.bdev.ext_opts = opts_copy;
-}
-
-static inline void
-_bdev_io_ext_use_bounce_buffer(struct spdk_bdev_io *bdev_io)
-{
-	/* bdev doesn't support memory domains, thereby buffers in this IO request can't
-	 * be accessed directly. It is needed to allocate buffers before issuing IO operation.
-	 * For write operation we need to pull buffers from memory domain before submitting IO.
-	 * Once read operation completes, we need to use memory_domain push functionality to
-	 * update data in original memory domain IO buffer
-	 * This IO request will go through a regular IO flow, so clear memory domains pointers in
-	 * the copied ext_opts */
-	bdev_io->internal.ext_opts_copy.memory_domain = NULL;
-	bdev_io->internal.ext_opts_copy.memory_domain_ctx = NULL;
-	_bdev_memory_domain_io_get_buf(bdev_io, _bdev_memory_domain_get_io_cb,
-				       bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
-}
-
 static int
 bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch, void *buf,
 			 void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
@@ -4244,20 +4266,7 @@ bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *c
 	bdev_io->internal.ext_opts = opts;
 	bdev_io->u.bdev.ext_opts = opts;
 
-	if (opts) {
-		bool use_pull_push = opts->memory_domain && !desc->memory_domains_supported;
-
-		assert(opts->size <= sizeof(*opts));
-		if (copy_opts || use_pull_push) {
-			_bdev_io_copy_ext_opts(bdev_io, opts);
-			if (use_pull_push) {
-				_bdev_io_ext_use_bounce_buffer(bdev_io);
-				return 0;
-			}
-		}
-	}
-
-	bdev_io_submit(bdev_io);
+	_bdev_io_submit_ext(desc, bdev_io, opts, copy_opts);
 
 	return 0;
 }
@@ -4289,6 +4298,15 @@ spdk_bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_chann
 					 num_blocks, cb, cb_arg, NULL, false);
 }
 
+static inline bool
+_bdev_io_check_opts(struct spdk_bdev_ext_io_opts *opts, struct iovec *iov)
+{
+	return opts->size > 0 &&
+	       opts->size <= sizeof(*opts) &&
+	       /* When memory domain is used, the user must provide data buffers */
+	       (!opts->memory_domain || (iov && iov[0].iov_base));
+}
+
 int
 spdk_bdev_readv_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
 			   struct iovec *iov, int iovcnt,
@@ -4299,11 +4317,7 @@ spdk_bdev_readv_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *
 	void *md = NULL;
 
 	if (opts) {
-		if (spdk_unlikely(!opts->size || opts->size > sizeof(struct spdk_bdev_ext_io_opts))) {
-			return -EINVAL;
-		}
-		if (spdk_unlikely(opts->memory_domain && !(iov && iov[0].iov_base))) {
-			/* When memory domain is used, the user must provide data buffers */
+		if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
 			return -EINVAL;
 		}
 		md = opts->metadata;
@@ -4441,20 +4455,7 @@ bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *
 	bdev_io->internal.ext_opts = opts;
 	bdev_io->u.bdev.ext_opts = opts;
 
-	if (opts) {
-		bool use_pull_push = opts->memory_domain && !desc->memory_domains_supported;
-
-		assert(opts->size <= sizeof(*opts));
-		if (copy_opts || use_pull_push) {
-			_bdev_io_copy_ext_opts(bdev_io, opts);
-			if (use_pull_push) {
-				_bdev_io_ext_use_bounce_buffer(bdev_io);
-				return 0;
-			}
-		}
-	}
-
-	bdev_io_submit(bdev_io);
+	_bdev_io_submit_ext(desc, bdev_io, opts, copy_opts);
 
 	return 0;
 }
@@ -4513,11 +4514,7 @@ spdk_bdev_writev_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel
 	void *md = NULL;
 
 	if (opts) {
-		if (spdk_unlikely(!opts->size || opts->size > sizeof(struct spdk_bdev_ext_io_opts))) {
-			return -EINVAL;
-		}
-		if (spdk_unlikely(opts->memory_domain && !(iov && iov[0].iov_base))) {
-			/* When memory domain is used, the user must provide data buffers */
+		if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
 			return -EINVAL;
 		}
 		md = opts->metadata;