md: add exact bitmap mapping and reshape hooks

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Add bitmap mapping and reshape hooks needed by llbitmap reshape
support without teaching md core to account a single bio against
multiple bitmap ranges.

This also adds the old/new bitmap geometry helpers used by
personalities to describe reshape mapping to llbitmap.

Tested-by: Mykola Marzhan <mykola@meshstor.io>
Link: https://patch.msgid.link/20260802195038.164272-13-yukuai@kernel.org
Signed-off-by: Yu Kuai <yukuai@fygo.io>

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This commit is contained in:

Yu Kuai 2026-08-03 03:50:21 +08:00

parent ffd3e73d6e

commit 1ee6fef6e0

5 changed files with 36 additions and 3 deletions

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8

drivers/md/md-bitmap.c

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8

drivers/md/md-bitmap.h

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8

drivers/md/md-llbitmap.c

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11

drivers/md/md.c

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4

drivers/md/md.h

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