bcachefs: Data update support for unwritten extents

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The data update path requires special support for unwritten extents - we
still need to be able to move them, but there's no need to read or write
anything.

This patch adds a new error code to tell bch2_move_extent() that we're
short circuiting the read, and adds bch2_update_unwritten_extent() to
create a reservation then call __bch2_data_update_index_update().

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

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This commit is contained in:

Kent Overstreet 2022-11-14 01:31:10 -05:00

parent 792031116b

commit 4dcd1cae72

4 changed files with 118 additions and 13 deletions

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118

fs/bcachefs/data_update.c

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1

fs/bcachefs/data_update.h

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1

fs/bcachefs/errcode.h

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11

fs/bcachefs/move.c

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