vmm: fix migration sender hang on worker failure

.config/nextest.toml

@@ -0,0 +1,3 @@
+[profile.default]
+# Don't let one individual test run for more than 10 minutes
+slow-timeout = { period = "60s", terminate-after = 10 }

.editorconfig

@@ -0,0 +1,25 @@
+# https://editorconfig.org/
+#
+# Hints for editors to assist with correct formatting as you type.
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+indent_size = 4
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+# Recommendation, not enforced.
+max_line_length = 80
+
+[Makefile]
+indent_style = tab
+
+# Inherited as default
+# [*.sh]
+# indent_size = 4
+
+[{Cargo.lock,*.md,*.toml,*.yml,*.yaml}]
+indent_size = 2

.envrc

@@ -0,0 +1 @@
+use flake

.github/dependabot.yml

@@ -1,21 +1,73 @@
 version: 2
 updates:
 - package-ecosystem: cargo
-  directory: "/"
+  directories:
+    - "/"
+    - "/fuzz"
   schedule:
-    interval: daily
-  open-pull-requests-limit: 1
+    interval: weekly
   allow:
-  - dependency-type: direct
-  - dependency-type: indirect
+    - dependency-name: "acpi_tables"
+    - dependency-name: "kvm-bindings"
+    - dependency-name: "kvm-ioctls"
+    - dependency-name: "linux-loader"
+    - dependency-name: "micro_http"
+    - dependency-name: "mshv-bindings"
+    - dependency-name: "mshv-ioctls"
+    - dependency-name: "seccompiler"
+    - dependency-name: "vfio-bindings"
+    - dependency-name: "vfio-ioctls"
+    - dependency-name: "vfio_user"
+    - dependency-name: "vhost"
+    - dependency-name: "vhost-user-backend"
+    - dependency-name: "virtio-bindings"
+    - dependency-name: "virtio-queue"
+    - dependency-name: "vm-fdt"
+    - dependency-name: "vm-memory"
+    - dependency-name: "vmm-sys-util"
+  groups:
+      rust-vmm:
+        patterns:
+          - "*"
 - package-ecosystem: cargo
-  directory: "/fuzz"
+  directories:
+    - "/"
+    - "/fuzz"
   schedule:
-    interval: daily
-  open-pull-requests-limit: 1
+    interval: weekly
   allow:
-  - dependency-type: direct
-  - dependency-type: indirect
+    - dependency-type: all
+  cooldown:
+    default-days: 7
+    semver-major-days: 14
+    semver-minor-days: 7
+    semver-patch-days: 3
+  ignore:
+    - dependency-name: "acpi_tables"
+    - dependency-name: "kvm-bindings"
+    - dependency-name: "kvm-ioctls"
+    - dependency-name: "linux-loader"
+    - dependency-name: "micro_http"
+    - dependency-name: "mshv-bindings"
+    - dependency-name: "mshv-ioctls"
+    - dependency-name: "seccompiler"
+    - dependency-name: "vfio-bindings"
+    - dependency-name: "vfio-ioctls"
+    - dependency-name: "vfio_user"
+    - dependency-name: "vhost"
+    - dependency-name: "vhost-user-backend"
+    - dependency-name: "virtio-bindings"
+    - dependency-name: "virtio-queue"
+    - dependency-name: "vm-fdt"
+    - dependency-name: "vm-memory"
+    - dependency-name: "vmm-sys-util"
+  groups:
+      non-rust-vmm:
+        patterns:
+          - "*"
+  # Makes it possible to have another config for the same directory.
+  # https://github.com/dependabot/dependabot-core/issues/1778#issuecomment-1988140219
+  target-branch: main
 - package-ecosystem: github-actions
   directory: "/"
   schedule:

.github/workflows/build_nix.yaml

@@ -0,0 +1,38 @@
+name: Cloud Hypervisor Build (Nix)
+on: [push, pull_request, merge_group]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Code checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: cachix/install-nix-action@v31
+      # We restore Nix evaluation and Nix tarball cache, speeding up the CI.
+      # This does not cover any Nix artifacts from the Nix store.
+      - name: Restore Nix cache
+        uses: actions/cache@v5
+        with:
+          path: ~/.cache/nix
+          key: nix-cache-${{ github.job }}
+      # Nix binary cache
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      # Dedicated step to separate all the
+      # "copying path '/nix/store/...' from 'https://cache.nixos.org'."
+      # messages from the actual build output.
+      - name: Prepare Nix Store
+        run: nix develop --command bash -c "nix --version"
+      - name: Check Nix format
+        run: nix fmt -- --ci
+      - name: Check Nix Flake
+        run: nix flake check -L
+      - name: Build Cloud Hypervisor
+        run: |
+          nix build -L .#default
+          nix build -L .#cloud-hypervisor