bcachefs: bcachefs_metadata_version_major_minor

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This introduces major/minor versioning to the superblock version number.
Major version number changes indicate incompatible releases; we can move
forward to a new major version number, but not backwards. Minor version
numbers indicate compatible changes - these add features, but can still
be mounted and used by old versions.

With the recent patches that make it possible to roll out new btrees and
key types without breaking compatibility, we should be able to roll out
most new features without incompatible changes.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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This commit is contained in:

Kent Overstreet 2023-06-27 22:09:35 -04:00

parent 30a8278a1e

commit ba8eeae8ee

7 changed files with 129 additions and 61 deletions

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1

fs/bcachefs/bcachefs.h

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46

fs/bcachefs/bcachefs_format.h

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7

fs/bcachefs/btree_io.c

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12

fs/bcachefs/journal_io.c

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63

fs/bcachefs/recovery.c

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58

fs/bcachefs/super-io.c

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3

fs/bcachefs/super-io.h

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