[PATCH v5 00/10] nfsd: more delegation fixes to prepare for client_mutex removal

[Jeff Layton <jlayton@primarydata.com>]

v5:
- fix spinlocking in block_delegations. Lock should be held around all
  of the set_bit calls so we don't race with the swap of the two
  fields.

- eliminate destroy_revoked_delegation (just use nfs4_put_delegation)

- eliminate unneeded NULL pointer check in nfs4_setlease

v4:
- close more potential races in setlease code, and fix some bugs in
  error handling in that code.

- clean up delegation setting functions, eliminating unused arguments
  and avoiding allocations when there has already been a delegation
  break

- add separate spinlock for block_delegations/delegation_blocked code

v3:
- use alternate method for checking for delegation break races after
  getting a lease (just check fi_had_conflict instead)

- drop file_has_lease patch -- no longer needed

- move cl_revoked handling patch into this set. It means altering a
  few of the later patches, but it keeps the set more topically
  coherent

v2:
- move remove_stid call from nfs4_free_stid and into callers

Ok, I'm hoping we're now on the final respin here. This just cleans
up some nits that Christoph noticed in the last set. It also fixes
a potential bug that Neil noticed around the block_delegations
spinlocking.

Bruce, I noticed that you had merged the last set into your nfsd-next
branch, so let me know if you'd prefer me to do incremental changes
on top of that instead.

Jeff Layton (7):
  nfsd: Protect the nfs4_file delegation fields using the fi_lock
  nfsd: Fix delegation revocation
  nfsd: ensure that clp->cl_revoked list is protected by clp->cl_lock
  nfsd: drop unused stp arg to alloc_init_deleg
  nfsd: clean up arguments to nfs4_open_delegation
  nfsd: clean up nfs4_set_delegation
  nfsd: give block_delegation and delegation_blocked its own spinlock

Trond Myklebust (3):
  nfsd: Move the delegation reference counter into the struct nfs4_stid
  nfsd: simplify stateid allocation and file handling
  nfsd: Convert delegation counter to an atomic_long_t type

 fs/nfsd/nfs4state.c | 253 ++++++++++++++++++++++++++++++++--------------------
 fs/nfsd/state.h     |   2 +-
 2 files changed, 159 insertions(+), 96 deletions(-)

-- 
1.9.3