mount: Support unmounting src

[mks-h]

SUMMARY

Currently the module can only unmount path (aka target or mountpoint). However, at least on Linux, the umount command can also unmount src from all locations it was mounted to. Therefore I would like for this module to be able to work with src=/dev/sdXY state=unmounted (and preferably absent, too).

ISSUE TYPE

• Feature Idea

COMPONENT NAME

mount

ADDITIONAL INFORMATION

The invocation of umount for the source is the same as for the target — umount /path/to/either. You can also specify --target or --source before the path to make it unambiguous.

- name: Unmount a partition
  ansible.posix.mount:
    src: /dev/sda1
    state: unmounted

The reason that path=/dev/sda1 state=unmounted doesn't currently work is because it checks first if the path is mounted. And the source isn't necessarily a target — unless it also is, so the --target and --source should be used to make this all work correctly.