mount9p

#!/bin/bash
#
# Version 1.4
# Latest version of this script: https://gist.github.com/ljm42/a49268b325df3a2e78d5bafec10b5be7
#
# This script will automatically mount any 9p mount tags that exist
# Designed to be run on Unraid through the User Scripts plugin
#
# 9p docs:
#   https://wiki.qemu.org/Documentation/9psetup
#   https://www.kernel.org/doc/Documentation/filesystems/9p.txt
#
# Other info:
#   To list 9p mount points:  mount -t 9p
#   To unmount 9p share:      umount <MOUNT_TAG> or umount /mnt/9p/<MOUNT_TAG>
#   To unmount all 9p shares: umount -a -t 9p
#

log() {
  echo "$1"
  logger -t "mount9p" "$1"
}

MSIZE=$((256 * 1024))
for T in /sys/bus/virtio/drivers/9pnet_virtio/virtio*/mount_tag; do
  if [[ ! -f "${T}" ]]; then
    log "No 9p mount points defined"
    continue
  fi
  MOUNT_TAG=$(tr -d '\0' <"${T}")
  MOUNT_POINT="/mnt/9p/${MOUNT_TAG}"
  if [[ $(findmnt -S "${MOUNT_TAG}") ]]; then
    log "[${MOUNT_TAG}] already mounted"
  elif [[ $(findmnt -M "${MOUNT_POINT}") ]]; then
    log "Something already mounted in ${MOUNT_POINT}"
  elif [[ -d "${MOUNT_POINT}" && "$(ls -A "${MOUNT_POINT}")" ]]; then
    log "${MOUNT_POINT} is not empty"
  else
    mkdir -p "${MOUNT_POINT}"
    mount -t 9p -o trans=virtio,version=9p2000.L,msize="${MSIZE}" "${MOUNT_TAG}" "${MOUNT_POINT}"
    retVal=$?
    if [[ $retVal -eq 0 ]]; then
      log "[${MOUNT_TAG}] mounted as ${MOUNT_POINT}"
    else
      log "[${MOUNT_TAG}] not mounted error [${retVal}]"
    fi
  fi
done

umount9p

#!/bin/bash
#
# Version 1.4
# Latest version of this script: https://gist.github.com/ljm42/a49268b325df3a2e78d5bafec10b5be7
#
# This script will automatically umount anything in /mnt/9p/
# Designed to be run on Unraid through the User Scripts plugin
#

log() {
  echo "$1"
  logger -t "umount9p" "$1"
}

ROOT9P=/mnt/9p/
# shellcheck disable=SC2231
for MOUNT_POINT in ${ROOT9P}*; do
  if [[ ! -d "${MOUNT_POINT}" ]]; then
    log "No mount points defined in ${ROOT9P}"
    continue
  fi
  if [[ $(findmnt -M "${MOUNT_POINT}") ]]; then
    umount -t 9p "${MOUNT_POINT}"
    rmdir "${MOUNT_POINT}"
    log "${MOUNT_POINT} unmounted"
  fi
done
[[ -d "${ROOT9P}" ]] && rmdir "${ROOT9P}" &>/dev/null