Move all crates to workspace root

Having all the workspace crates under the crates/ directory is
unnecessary. Rust documentation itself recommends all crates to be in
the root directory:

https://doc.rust-lang.org/book/ch14-03-cargo-workspaces.html#creating-the-second-package-in-the-workspace

I paste the text content here, in case the online page ever changes or
becomes unavailable:

    ## Creating the Second Package in the Workspace

    Next, let’s create another member package in the workspace and call it add_one. Change the top-level Cargo.toml to specify the add_one path in the members list:

    Filename: Cargo.toml

    [workspace]

    members = [
        "adder",
        "add_one",
    ]

    Then generate a new library crate named add_one:

    $ cargo new add_one --lib
         Created library `add_one` package

    Your add directory should now have these directories and files:

    ├── Cargo.lock
    ├── Cargo.toml
    ├── add_one
    │   ├── Cargo.toml
    │   └── src
    │       └── lib.rs
    ├── adder
    │   ├── Cargo.toml
    │   └── src
    │       └── main.rs
    └── target

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>

Author: epilys

Cargo.toml

@@ -1,10 +1,12 @@
 [workspace]
 members = [
-    "crates/devices/*",
-    "crates/virtio-bindings",
-    "crates/virtio-device",
-    "crates/virtio-queue",
-    "crates/virtio-queue-ser",
+    "virtio-bindings",
+    "virtio-blk",
+    "virtio-console",
+    "virtio-device",
+    "virtio-queue",
+    "virtio-queue-ser",
+    "virtio-vsock",
 ]
 
 [profile.bench]

README.md

@@ -1,5 +1,5 @@
 {
   "coverage_score": 86.98,
-  "exclude_path": "crates/virtio-bindings|crates/virtio-queue/src/mock\\.rs",
+  "exclude_path": "virtio-bindings|virtio-queue/src/mock\\.rs",
   "crate_features": "virtio-blk/backend-stdio"
 }

coverage_config_x86_64.json

@@ -17,12 +17,12 @@ bincode = "1.3.3"
 libfuzzer-sys = "0.4"
 serde = "1.0.63"
 memfd = "0.6.3"
-virtio-queue = { path = "../crates/virtio-queue", features = ["test-utils"] }
-virtio-vsock = { path = "../crates/devices/virtio-vsock" }
-virtio-queue-ser = { path = "../crates/virtio-queue-ser" }
+virtio-queue = { path = "../virtio-queue", features = ["test-utils"] }
+virtio-vsock = { path = "../virtio-vsock" }
+virtio-queue-ser = { path = "../virtio-queue-ser" }
 vm-memory = { version = "0.13.1", features = ["backend-mmap", "backend-atomic"] }
 common = { path = "common" }
-virtio-blk = { path = "../crates/devices/virtio-blk", features = ["backend-stdio"] }
+virtio-blk = { path = "../virtio-blk", features = ["backend-stdio"] }
 
 [[bin]]
 name = "virtio_queue"

fuzz/Cargo.toml

@@ -8,9 +8,9 @@ edition = "2021"
 [dependencies]
 bincode = "1.3.3"
 serde = "1.0.63"
-virtio-bindings = { path = "../../crates/virtio-bindings" }
-virtio-queue = { path = "../../crates/virtio-queue", features = ["test-utils"] }
-virtio-vsock = { path = "../../crates/devices/virtio-vsock" }
-virtio-queue-ser = { path = "../../crates/virtio-queue-ser" }
-virtio-blk = { path = "../../crates/devices/virtio-blk" }
+virtio-bindings = { path = "../../virtio-bindings" }
+virtio-queue = { path = "../../virtio-queue", features = ["test-utils"] }
+virtio-vsock = { path = "../../virtio-vsock" }
+virtio-queue-ser = { path = "../../virtio-queue-ser" }
+virtio-blk = { path = "../../virtio-blk" }
 vm-memory = { version = "0.13.1", features = ["backend-mmap", "backend-atomic"] }