bcachefs: BTREE_ID_subvolume_children

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Add a btree to record a parent -> child subvolume relationships,
according to the filesystem heirarchy.

The subvolume_children btree is a bitset btree: if a bit is set at pos
p, that means p.offset is a child of subvolume p.inode.

This will be used for efficiently listing subvolumes, as well as
recursive deletion.

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

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This commit is contained in:

Kent Overstreet 2024-01-21 06:00:07 -05:00

parent b8628a2529

commit b26d79147f

7 changed files with 114 additions and 3 deletions

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1

fs/bcachefs/bcachefs.h

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7

fs/bcachefs/bcachefs_format.h

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1

fs/bcachefs/btree_types.h

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1

fs/bcachefs/recovery_types.h

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5

fs/bcachefs/sb-downgrade.c

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98

fs/bcachefs/subvolume.c

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4

fs/bcachefs/subvolume.h

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