vcontainer: add sanity checks and auto-enable virtfs for QEMU

Fix virtio-9p (virtfs) support for container-cross-install batch
imports which provides ~50x speedup over base64-over-serial.

The issue was that native recipes don't see target DISTRO_FEATURES,
so qemu-system-native wasn't getting virtfs enabled.

Fix by:
- layer.conf: Propagate virtualization to DISTRO_FEATURES_NATIVE when
  vcontainer or virtualization is in target DISTRO_FEATURES
- qemu-system-native: Check DISTRO_FEATURES_NATIVE for virtfs enable
- container-cross-install: Prepend native sysroot to PATH so vrunner
  finds the QEMU with virtfs support

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/classes/container-cross-install.bbclass b/classes/container-cross-install.bbclass
index d365d7a1..d18c6436 100644
--- a/classes/container-cross-install.bbclass
+++ b/classes/container-cross-install.bbclass
@@ -830,7 +830,8 @@ Or remove it from BUNDLED_CONTAINERS if not needed.
         VRUNNER_CMD="${VRUNNER_CMD} -- ${DOCKER_CONTAINERS}"
 
         bbnote "Running batch import for Docker containers..."
-        TMPDIR="${WORKDIR}" eval ${VRUNNER_CMD}
+        # Prepend native sysroot to PATH so vrunner finds the correct QEMU (with virtfs support)
+        PATH="${STAGING_BINDIR_NATIVE}:${PATH}" TMPDIR="${WORKDIR}" eval ${VRUNNER_CMD}
 
         if [ $? -ne 0 ]; then
             bbfatal "Docker batch import failed"
@@ -894,7 +895,8 @@ Or remove it from BUNDLED_CONTAINERS if not needed.
         VRUNNER_CMD="${VRUNNER_CMD} -- ${PODMAN_CONTAINERS}"
 
         bbnote "Running batch import for Podman containers..."
-        TMPDIR="${WORKDIR}" eval ${VRUNNER_CMD}
+        # Prepend native sysroot to PATH so vrunner finds the correct QEMU (with virtfs support)
+        PATH="${STAGING_BINDIR_NATIVE}:${PATH}" TMPDIR="${WORKDIR}" eval ${VRUNNER_CMD}
 
         if [ $? -ne 0 ]; then
             bbfatal "Podman batch import failed"