WIP

Signed-off-by: Babis Chalios <[email protected]>

Author: bchalios

resources/seccomp/aarch64-unknown-linux-musl.json

@@ -32,6 +32,10 @@
                 "syscall": "writev",
                 "comment": "Used by the VirtIO net device to write to tap"
             },
+            {
+                "syscall": "readv",
+                "comment": "Used by the VirtIO net device to write from tap"
+            },
             {
                 "syscall": "fsync"
             },

resources/seccomp/x86_64-unknown-linux-musl.json

@@ -32,6 +32,10 @@
                 "syscall": "writev",
                 "comment": "Used by the VirtIO net device to write to tap"
             },
+            {
+                "syscall": "readv",
+                "comment": "Used by the VirtIO net device to read from tap"
+            },
             {
                 "syscall": "fsync"
             },

src/vmm/src/devices/virtio/iovec.rs

@@ -517,6 +517,23 @@ mod tests {
         }
     }
 
+    impl<'a> From<Vec<&'a mut [u8]>> for IoVecBufferMut<'a> {
+        fn from(mut buffer: Vec<&'a mut [u8]>) -> Self {
+            let mut len = 0usize;
+            let mut vecs = IovDeque::new().unwrap();
+            buffer.drain(..).for_each(|slice| {
+                len += slice.len();
+
+                vecs.push_back(iovec {
+                    iov_base: slice.as_ptr() as *mut c_void,
+                    iov_len: slice.len(),
+                });
+            });
+
+            Self { vecs, len }
+        }
+    }
+
     fn default_mem() -> GuestMemoryMmap {
         multi_region_mem(&[
             (GuestAddress(0), 0x10000),