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-rw-r--r--usr/src/uts/common/io/vio9p/vio9p_impl.h16
1 files changed, 13 insertions, 3 deletions
diff --git a/usr/src/uts/common/io/vio9p/vio9p_impl.h b/usr/src/uts/common/io/vio9p/vio9p_impl.h
index f8718c1ed2..74cb5bef15 100644
--- a/usr/src/uts/common/io/vio9p/vio9p_impl.h
+++ b/usr/src/uts/common/io/vio9p/vio9p_impl.h
@@ -62,8 +62,18 @@ extern "C" {
/*
* DRIVER PARAMETERS
*/
-#define VIRTIO_9P_MAX_REQS 16
-#define VIRTIO_9P_REQ_SIZE 8192
+
+/*
+ * A limit on the number of requests that can be allocated for a vio9p device.
+ */
+#define VIRTIO_9P_MAX_REQS 8
+
+/*
+ * This parameter defines an upper bound on 9P protocol message size (msize). 9P
+ * servers may negotiate an msize up to this value. An attempt to transfer a
+ * message larger than this will result in a EMSGISZE error.
+ */
+#define VIRTIO_9P_REQ_SIZE 65536
/*
* It is not clear that there is a well-defined number of cookies for this
@@ -72,7 +82,7 @@ extern "C" {
* number that's large enough to ensure we'll be able to allocate without
* requiring contiguous pages.
*/
-#define VIRTIO_9P_MAX_SGL 8
+#define VIRTIO_9P_MAX_SGL 64
/*
* TYPE DEFINITIONS