Previously, we were waiting to find the target bdev as
registered before proceeding with nbd operations. But
there can be a delay between when the bdev is registered
and when the nbd device becomes ready for block I/O
operations. This delay has recently become longer as
lvol now performs I/O on registered bdevs to check for
an existing logical volume store.
So instead, check for the existence of the nbd device
in /proc/partitions output.
While here, also fix a bug in the nbd.c code - it needs
to wait for the poller to be unregistered before calling
spdk_nbd_stop(). Normally I would fix this in a separate
patch but because these issues are causing a lot of
failures in the test pool, I'm expediting this by putting
both fixes in one patch (so we can avoid a bunch of
re-runs).
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ia297337338f7eeee9b4c56b80e941d373c1a965d
Reviewed-on: https://review.gerrithub.io/385687
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
f176436b69