Add vio9p script for NetBSD
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#!/bin/sh
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#############################################################
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# Author: Taryel Hlontsi, 2024
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>
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#############################################################
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doc=$(cat <<'EOF'
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NOTES:
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To be able to mount a directory in NetBSD that runs as KVM/Qemu quest
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the following has to be done:
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1) the kernel must include vio9p driver (not included by default)
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2) dev node has to be created for the character device (file share in this case)
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3) mount_9p utility must be used to mount the file share
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4) (oprional) a service can be created that mounts the fileshare at boot time
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EOF
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)
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#############################################################
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# HELPER FUNCTIONS
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#############################################################
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info() {
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GREEN='\033[1;32m'
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NC='\033[0m'
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echo -e "${GREEN}$1${NC}"
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}
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trace() {
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YELLOW='\033[1;33m'
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NC='\033[0m'
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echo -e "${YELLOW}$1${NC}"
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}
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warn() {
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PURPLE='\033[1;35m'
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NC='\033[0m'
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echo -e "${PURPLE}$1${NC}"
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}
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error() {
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RED='\033[1;31m'
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NC='\033[0m'
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echo -e "${RED}$1${NC}"
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}
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#############################################################
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# 1 - BUILD AND INSTALL KERNEL THAT SUPPORTS VIO9P DRIVER
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#############################################################
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install_kernel_with_vio9p() {
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local step_name='STEP 1: BUILD AND INSTALL KERNEL THAT SUPPORTS VIO9P'
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warn "Press enter to proceed with $step_name"; read confirm
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info "$step_name"
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local expected_kernel_name='MYKERNEL2'
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if uname -v | grep -q "$expected_kernel_name"; then
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warn 'The kernel seems to be already installed. Nothing to do'
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return 0
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fi
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local config_path="/usr/src/sys/arch/$(uname -m)/conf/"
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if [ ! -e "$config_path" ]; then
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warn 'There is no sources to compile the kernel.'
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warn 'Go to https://www.netbsd.org/docs/guide/en/chap-fetch.html'
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warn 'to check how to obtain the sources'
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return 1
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fi
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cd $config_path
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pwd
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cp GENERIC $expected_kernel_name
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sed -i "s~^#vio9p~vio9p~" $expected_kernel_name
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config $expected_kernel_name && \
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cd ../compile/$expected_kernel_name && \
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make depend && \
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make && \
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mv /netbsd /netbsd.backup && \
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mv netbsd /
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if [ $? != 0 ]; then
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warn 'Something went bananas while compiling and installing the kernel'
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return 1
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fi
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info 'Now the machine will be rebooted'
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info 'After that, run the script again to continue this process'
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shutdown -r +1
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}
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#############################################################
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# 2 - MOUNT SHARED DIR
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#############################################################
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mount_virtio9p_share() {
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local step_name='STEP 2: MOUNT VIRTIO 9P SHARED DIR'
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warn "Press enter to proceed with $step_name"; read confirm
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info "$step_name"
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local service_name='share'
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local config_file="/etc/rc.d/${service_name}"
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cd /dev && sh MAKEDEV vio9p0
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if [ $? != 0 ]; then
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warn 'MAKEDEV failed'
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return 1
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fi
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cat <<'EOF' > ${config_file}
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#!/bin/sh
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#
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# PROVIDE: share
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# REQUIRE: DAEMON
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# KEYWORD: shutdown
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. /etc/rc.subr
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name="share"
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rcvar="$name"
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command="mount_9p -cu /dev/vio9p0 /mnt"
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start_cmd="share_start"
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stop_cmd=":"
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share_start() {
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echo "Mounting vio9p0 file share to /mnt"
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${command}
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}
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load_rc_config $name
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run_rc_command "$1"
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EOF
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local system_config='/etc/rc.conf'
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local service_enable="$service_name=YES"
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cat $system_config | grep -q "$service_enable" \
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|| echo "$service_enable" >> $system_config
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info 'STEP 2 is done!'
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info 'Now the machine will be rebooted'
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info 'Once rebooted, run `ls /mnt` to check if the fileshare is mounted'
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shutdown -r +1
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}
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info "$doc"
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install_kernel_with_vio9p \
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&& mount_virtio9p_share
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