Merge tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The main items are:

   - support for asynchronous create and unlink (Jeff Layton).

     Creates and unlinks are satisfied locally, without waiting for a
     reply from the MDS, provided the client has been granted
     appropriate caps (new in v15.y.z ("Octopus") release). This can be
     a big help for metadata heavy workloads such as tar and rsync.
     Opt-in with the new nowsync mount option.

   - multiple blk-mq queues for rbd (Hannes Reinecke and myself).

     When the driver was converted to blk-mq, we settled on a single
     blk-mq queue because of a global lock in libceph and some other
     technical debt. These have since been addressed, so allocate a
     queue per CPU to enhance parallelism.

   - don't hold onto caps that aren't actually needed (Zheng Yan).

     This has been our long-standing behavior, but it causes issues with
     some active/standby applications (synchronous I/O, stalls if the
     standby goes down, etc).

   - .snap directory timestamps consistent with ceph-fuse (Luis
     Henriques)"

* tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-client: (49 commits)
  ceph: fix snapshot directory timestamps
  ceph: wait for async creating inode before requesting new max size
  ceph: don't skip updating wanted caps when cap is stale
  ceph: request new max size only when there is auth cap
  ceph: cleanup return error of try_get_cap_refs()
  ceph: return ceph_mdsc_do_request() errors from __get_parent()
  ceph: check all mds' caps after page writeback
  ceph: update i_requested_max_size only when sending cap msg to auth mds
  ceph: simplify calling of ceph_get_fmode()
  ceph: remove delay check logic from ceph_check_caps()
  ceph: consider inode's last read/write when calculating wanted caps
  ceph: always renew caps if mds_wanted is insufficient
  ceph: update dentry lease for async create
  ceph: attempt to do async create when possible
  ceph: cache layout in parent dir on first sync create
  ceph: add new MDS req field to hold delegated inode number
  ceph: decode interval_sets for delegated inos
  ceph: make ceph_fill_inode non-static
  ceph: perform asynchronous unlink if we have sufficient caps
  ceph: don't take refs to want mask unless we have all bits
  ...

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