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recovery: reboot recovery of delegation stateids

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recover_client_state() flags all delegations as revoked before starting open state recovery.  if recover_open() finds that its delegation is revoked, it attempts to recover it using CLAIM_PREVIOUS.  if its delegation has already been reclaimed by another open, it can skip reclaiming the open stateid (provided it has no byte-range locks to reclaim).  after all opens have been reclaimed, any delegations still marked 'revoked' are passed to recover_delegation().  recover_delegation() also uses CLAIM_PREVIOUS (or CLAIM_NULL outside of the grace period) to reclaim the delegation, but has to throw away the open stateid with CLOSE

added a try_recovery argument to nfs41_delegreturn() and nfs41_delegation_granted(), so it can be called by recover_open() if OPEN grants an unexpected open

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-07-19 11:04:53 -04:00 • committed by unknown
parent 3734527757
commit 4f47ae9a37
7 changed files with 228 additions and 32 deletions
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4
daemon/open.c
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@ -209,8 +209,8 @@ static int do_open(
goto out;
/* allocate delegation state and register it with the client */
nfs41_delegation_granted(state->session,
&state->file, &delegation, &deleg_state);
nfs41_delegation_granted(state->session, &state->parent,
&state->file, &delegation, TRUE, &deleg_state);
AcquireSRWLockExclusive(&state->lock);
/* update the stateid */