crosvm/tools/examples/example_fs
yuanyaogoog 6a8c9dc22c docs: Add virtio-fs document in crosvm book
Crosvm book don't have a documentation for how to run and use the virtio-fs.

Add a fs chapter under device, and upload a runnable example.

BUG=b:235067443
TEST=mdbook build docs/book

Change-Id: I8ef1ceb9d4cfc5f9a2e8afa2416d1f3ba69691b4
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4535500
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Reviewed-by: Takaya Saeki <takayas@chromium.org>
Commit-Queue: Yuan Yao <yuanyaogoog@chromium.org>
2023-05-19 01:45:15 +00:00

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#!/bin/bash
# Copyright 2023 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Example VM with a shared directory
set -e
SRC=$(realpath "$(dirname "${BASH_SOURCE[0]}")")
#If "example_simple" is executed, reuse its image. Otherwise, create one.
mkdir -p "$SRC/images/simple" && cd "$_"
mkdir -p "host_shared_dir"
HOST_SHARED_DIR="$SRC/images/simple/host_shared_dir"
if ! [ -f rootfs ]; then
# Build a simple ubuntu image and create a user with no password.
virt-builder ubuntu-20.04 \
--run-command "useradd -m -g sudo -p '' $USER ; chage -d 0 $USER" \
-o ./rootfs
virt-builder --get-kernel ./rootfs -o .
fi
# Use crosvm/tools/examples/images/simple/host_shared_dir as mount point
cargo run -- run \
--shared-dir "$HOST_SHARED_DIR:my_shared_tag:type=fs" \
--rwdisk ./rootfs \
--initrd ./initrd.img-* \
-p "root=/dev/vda5 " \
./vmlinuz-*
## In guest OS, run following instructions to set up the shared directory
## sudo su
## mkdir /tmp/guest_shared_dir
## mount -t virtiofs my_shared_tag /tmp/guest_shared_dir