tree 9d1df5bffef545755e61d3cd4db412922d60a815
parent 420efbdf4d2358dc12913298ad44d041c6ac0ed6
author Ilya Dryomov <idryomov@gmail.com> 1521782087 +0100
committer Ilya Dryomov <idryomov@gmail.com> 1523864320 +0200

rbd: notrim map option

Add an option to turn off discard and write zeroes offload support to
avoid deprovisioning a fully provisioned image.  When enabled, discard
requests will fail with -EOPNOTSUPP, write zeroes requests will fall
back to manually zeroing.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Hitoshi Kamei <hitoshi.kamei.xm@hitachi.com>