Btrfs: changes to live filesystem are also written to replacement disk

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During a running dev replace operation, all write requests to
the live filesystem are duplicated to also write to the target
drive. Therefore btrfs_map_block() is changed to duplicate
stripes that are written to the source disk of a device replace
procedure to be written to the target disk as well.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

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Stefan Behrens 2012-11-06 14:43:46 +01:00 • committed by Josef Bacik

parent 29a8d9a0bc

commit 472262f35a

1 changed files with 49 additions and 1 deletions

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fs/btrfs/volumes.c

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