tree b6b5aa340ac11b63d07c5022c69a1d1be4a0edea
parent 1643dfa4c2c827d6e2aa419df8c17b0f24090278
author Ilya Dryomov <idryomov@gmail.com> 1471011101 +0200
committer Ilya Dryomov <idryomov@gmail.com> 1472075356 +0200

rbd: retry watch re-registration periodically

Revamp watch code to support retrying watch re-registration:

- add rbd_dev->watch_state for more robust errcb handling
- store watch cookie separately to avoid dereferencing watch_handle
  which is set to NULL on unwatch
- move re-register code into a delayed work and retry re-registration
  every second, unless the client is blacklisted

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Tested-by: Mike Christie <mchristi@redhat.com>