---
# Tasks to validate bind mounts (i.e. mount of a directory to another one).
# Linux and FreeBSD only.

- name: Create the mount point (the target of the mount)
  file:
    state: directory
    path: '{{ output_dir }}/mount_dest'

- name: Create a directory to bind mount (the source of the mount)
  file:
    state: directory
    path: '{{ output_dir }}/mount_source'

- name: Put something in the directory so we see that it worked
  copy:
    content: 'Testing

      '
    dest: '{{ output_dir }}/mount_source/test_file'
  register: orig_info

- name: Bind mount a directory
  mount:
    src: '{{ output_dir }}/mount_source'
    name: '{{ output_dir }}/mount_dest'
    state: mounted
    fstype: "{{ 'none' if ansible_system == 'Linux' else 'nullfs' }}"
    opts:   "{{ 'bind' if ansible_system == 'Linux' else omit }}"
  register: bind_result

- name: get checksum for bind mounted file
  stat:
    path: '{{ output_dir }}/mount_dest/test_file'
  when: ansible_system in ('FreeBSD', 'Linux')
  register: dest_stat

- name: assert the bind mount was successful
  assert:
    that:
      - bind_result is changed
      - dest_stat.stat.exists
      - orig_info.checksum == dest_stat.stat.checksum

- name: Bind mount a directory again
  mount:
    src: '{{ output_dir }}/mount_source'
    name: '{{ output_dir }}/mount_dest'
    state: mounted
    fstype: "{{ 'none' if ansible_system == 'Linux' else 'nullfs' }}"
    opts:   "{{ 'bind' if ansible_system == 'Linux' else omit }}"
  register: bind_result

- name: Make sure we didn't mount a second time
  assert:
    that:
      - bind_result is not changed

- name: Remount directory with different options
  mount:
    src: '{{ output_dir }}/mount_source'
    name: '{{ output_dir }}/mount_dest'
    state: mounted
    fstype: "{{ 'none' if ansible_system == 'Linux' else 'nullfs' }}"
    opts:  "{{ 'bind,' if ansible_system == 'Linux' else '' }}ro"
  register: bind_result

- name: Get mount options
  shell:
    cmd: "mount | grep mount_dest | grep -E -w '(ro|read-only)' | wc -l"
  register: remount_options

- name: Make sure the filesystem now has the new opts
  assert:
    that:
      - bind_result is changed
      - '''1'' in remount_options.stdout'
      - 1 == remount_options.stdout_lines | length

- name: Unmount the bind mount
  mount:
    name: '{{ output_dir }}/mount_dest'
    state: absent
  register: unmount_result

- name: Check if the file still exists in dest
  stat:
    path: '{{ output_dir }}/mount_dest/test_file'
  register: dest_stat

- name: Assert that we unmounted
  assert:
    that:
      - unmount_result is changed
      - not dest_stat.stat.exists