dm snapshot: make bio optional in __origin_write

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To support the merging of snapshots back into their origin we need
to trigger exceptions in other snapshots not being merged without
any incoming bio on the origin device.  The bio parameter to
__origin_write() becomes optional and the sector needs supplying
separately.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

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Mikulas Patocka 2009-12-10 23:52:28 +00:00 • committed by Alasdair G Kergon

parent c2f3d24b78

commit 9eaae8ffbc

1 changed files with 18 additions and 5 deletions

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23

drivers/md/dm-snap.c

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