tree 8814720781708a95ac0bd23bb5232aa5ed9337bd
parent c96053b767d494d7c30e2be68097ac9defa9403f
author Mike Snitzer <snitzer@redhat.com> 1281582864 +0100
committer Alasdair G Kergon <agk@redhat.com> 1281582864 +0100

dm: split discard requests on target boundaries

Update __clone_and_map_discard to loop across all targets in a DM
device's table when it processes a discard bio.  If a discard crosses a
target boundary it must be split accordingly.

Update __issue_target_requests and __issue_target_request to allow a
cloned discard bio to have a custom start sector and size.

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