mount: Handle multi-device with 1 device node

Instead of requiring the user to supply all the device nodes for a
multi-device FS, allow them to specifiy 1 of them.  We then fetch
the UUID for the FS and then find all the disks on the system that
match this UUID.

This allows me to bring up a bcachefs FS in /etc/fstab by using a
UUID.  This works because it appears the mount command looks up
the UUID, finds an entry in /dev/disk/by-uuid and then passes that
found device node to mount.bcachefs which fails with
`insufficient_devices_to_start` as bcachefs is expecting a list of
devices with a ":" between them.  This behavior is preserved if a
user specifies a list of all the needed device nodes to bring up
the FS.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

0 files changed, 0 insertions, 0 deletions