dragonball: Group dbs_* crates under crates/

At src/dragonball/, the dragonball crate's own module tree (src/) sat as a
sibling of whole separate crates (dbs_acpi/, dbs_pci/, ...). That level
mixed one crate's guts with other crates -- neither cleanly one crate nor
a clean set of crates. Move the dbs_* under src/dragonball/crates/ so the
top level is the dragonball crate plus a crates/ folder of its libraries,
matching the layout src/runtime-rs already uses.

The dbs_* were imported ~2 years ago from the standalone dragonball-sandbox
repo and kept that repo's flat layout verbatim. They are now private to
kata (unpublished, versions frozen) -- plain internal workspace members --
so no external consumers are affected and the "independently published
building blocks" rationale for the flat layout no longer holds. Pure
layout change; no code or build behavior changes.

Signed-off-by: Xuewei Niu <niuxuewei.nxw@antgroup.com>

Cargo.toml

@@ -26,18 +26,18 @@ members = [
 
   # Dragonball
   "src/dragonball",
-  "src/dragonball/dbs_acpi",
-  "src/dragonball/dbs_address_space",
-  "src/dragonball/dbs_allocator",
-  "src/dragonball/dbs_arch",
-  "src/dragonball/dbs_boot",
-  "src/dragonball/dbs_device",
-  "src/dragonball/dbs_interrupt",
-  "src/dragonball/dbs_legacy_devices",
-  "src/dragonball/dbs_pci",
-  "src/dragonball/dbs_upcall",
-  "src/dragonball/dbs_utils",
-  "src/dragonball/dbs_virtio_devices",
+  "src/dragonball/crates/dbs_acpi",
+  "src/dragonball/crates/dbs_address_space",
+  "src/dragonball/crates/dbs_allocator",
+  "src/dragonball/crates/dbs_arch",
+  "src/dragonball/crates/dbs_boot",
+  "src/dragonball/crates/dbs_device",
+  "src/dragonball/crates/dbs_interrupt",
+  "src/dragonball/crates/dbs_legacy_devices",
+  "src/dragonball/crates/dbs_pci",
+  "src/dragonball/crates/dbs_upcall",
+  "src/dragonball/crates/dbs_utils",
+  "src/dragonball/crates/dbs_virtio_devices",
 
   # tools
   "src/tools/agent-ctl",
@@ -103,18 +103,18 @@ vmm-sys-util = "0.15.0"
 
 # Local dependencies from Dragonball Sandbox crates
 dragonball = { path = "src/dragonball" }
-dbs-acpi = { path = "src/dragonball/dbs_acpi" }
-dbs-address-space = { path = "src/dragonball/dbs_address_space" }
-dbs-allocator = { path = "src/dragonball/dbs_allocator" }
-dbs-arch = { path = "src/dragonball/dbs_arch" }
-dbs-boot = { path = "src/dragonball/dbs_boot" }
-dbs-device = { path = "src/dragonball/dbs_device" }
-dbs-interrupt = { path = "src/dragonball/dbs_interrupt" }
-dbs-legacy-devices = { path = "src/dragonball/dbs_legacy_devices" }
-dbs-pci = { path = "src/dragonball/dbs_pci" }
-dbs-upcall = { path = "src/dragonball/dbs_upcall" }
-dbs-utils = { path = "src/dragonball/dbs_utils" }
-dbs-virtio-devices = { path = "src/dragonball/dbs_virtio_devices" }
+dbs-acpi = { path = "src/dragonball/crates/dbs_acpi" }
+dbs-address-space = { path = "src/dragonball/crates/dbs_address_space" }
+dbs-allocator = { path = "src/dragonball/crates/dbs_allocator" }
+dbs-arch = { path = "src/dragonball/crates/dbs_arch" }
+dbs-boot = { path = "src/dragonball/crates/dbs_boot" }
+dbs-device = { path = "src/dragonball/crates/dbs_device" }
+dbs-interrupt = { path = "src/dragonball/crates/dbs_interrupt" }
+dbs-legacy-devices = { path = "src/dragonball/crates/dbs_legacy_devices" }
+dbs-pci = { path = "src/dragonball/crates/dbs_pci" }
+dbs-upcall = { path = "src/dragonball/crates/dbs_upcall" }
+dbs-utils = { path = "src/dragonball/crates/dbs_utils" }
+dbs-virtio-devices = { path = "src/dragonball/crates/dbs_virtio_devices" }
 
 # Local dependencies from runtime-rs
 agent = { path = "src/runtime-rs/crates/agent" }

src/dragonball/Makefile

@@ -32,7 +32,7 @@ clippy:
 format:
 	@echo "INFO: rust fmt..."
 	# This is kinda dirty step here simply because cargo fmt --all will apply fmt to all dependencies of dragonball which will include /src/libs/protocols with some file generated during compilation time and could not be formatted when you use cargo fmt --all before building the whole project. In order to avoid this problem, we do fmt check in this following way.
-	rustfmt --edition 2018 ./dbs_address_space/src/lib.rs ./dbs_allocator/src/lib.rs ./dbs_arch/src/lib.rs ./dbs_boot/src/lib.rs ./dbs_device/src/lib.rs ./dbs_interrupt/src/lib.rs ./dbs_legacy_devices/src/lib.rs ./dbs_pci/src/lib.rs ./dbs_upcall/src/lib.rs ./dbs_utils/src/lib.rs ./dbs_virtio_devices/src/lib.rs ./src/lib.rs --check
+	rustfmt --edition 2018 ./crates/dbs_address_space/src/lib.rs ./crates/dbs_allocator/src/lib.rs ./crates/dbs_arch/src/lib.rs ./crates/dbs_boot/src/lib.rs ./crates/dbs_device/src/lib.rs ./crates/dbs_interrupt/src/lib.rs ./crates/dbs_legacy_devices/src/lib.rs ./crates/dbs_pci/src/lib.rs ./crates/dbs_upcall/src/lib.rs ./crates/dbs_utils/src/lib.rs ./crates/dbs_virtio_devices/src/lib.rs ./src/lib.rs --check
 
 clean:
 	cargo clean