bcachefs: Don't do upgrades in nochanges mode

nochanges mode is often used for getting data off of otherwise
nonrecoverable filesystems, which is often because of errors hit during
fsck.

Don't force version upgrade & fsck in nochanges mode, so that it's more
likely to mount.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-10-27 17:53:20 -04:00 • committed by Kent Overstreet
commit 8325cd1ed4