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recovery: support for WANT_DELEGATION

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for delegations without an associated open, try the optional WANT_DELEGATION operation with CLAIM_PREVIOUS before falling back to OPEN/CLAIM_PREVIOUS.  the advantage of WANT_DELEGATION is that it doesn't generate an open stateid, so we don't need the corresponding CLOSE as in recover_delegation_open().  if WANT_DELEGATION fails with NFS4ERR_NOTSUPP, don't try it again during that round of state recovery

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-07-22 11:32:04 -04:00 • committed by unknown
parent b9b3b00e76
commit 8e5ab92b2b
4 changed files with 238 additions and 42 deletions
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44
daemon/nfs41_ops.c
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@ -1527,6 +1527,50 @@ out:
return status;
}
enum nfsstat4 nfs41_want_delegation(
IN nfs41_session *session,
IN nfs41_path_fh *file,
IN deleg_claim4 *claim,
IN uint32_t want,
IN bool_t try_recovery,
OUT open_delegation4 *delegation)
{
enum nfsstat4 status;
nfs41_compound compound;
nfs_argop4 argops[3];
nfs_resop4 resops[3];
nfs41_sequence_args sequence_args;
nfs41_sequence_res sequence_res;
nfs41_putfh_args putfh_args;
nfs41_putfh_res putfh_res;
nfs41_want_delegation_args wd_args;
nfs41_want_delegation_res wd_res;
compound_init(&compound, argops, resops, "want_delegation");
compound_add_op(&compound, OP_SEQUENCE, &sequence_args, &sequence_res);
status = nfs41_session_sequence(&sequence_args, session, 0);
if (status)
goto out;
compound_add_op(&compound, OP_PUTFH, &putfh_args, &putfh_res);
putfh_args.file = file;
putfh_args.in_recovery = 0;
compound_add_op(&compound, OP_WANT_DELEGATION, &wd_args, &wd_res);
wd_args.claim = claim;
wd_args.want = want;
wd_res.delegation = delegation;
status = compound_encode_send_decode(session, &compound, try_recovery);
if (status)
goto out;
compound_error(status = compound.res.status);
out:
return status;
}
int nfs41_delegpurge(
IN nfs41_session *session)
{