8e310c5711
while the server is required to grant us delegations we reclaim through CLAIM_PREVIOUS, it may set the flag recalled=TRUE if it's not ready to grant the delegation. the client is then responsible for flushing modified state to the server and returning the delegation new function nfs41_client_delegation_recovery() cleans up after delegation recovery by a) returning any delegations flagged as recalled, and b) 'forgetting' any delegations that we failed to reclaim. this function is called under the client's state recovery lock, directly after open and delegation state is recovered added 'try_recovery' argument to delegation_return(), allowing it to be called during client state recovery. split out the code that removes the delegation from the client and its opens into delegation_remove(), which is what nfs41_client_delegation_recovery() uses to 'forget' a delegation Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
101 lines
3 KiB
C
101 lines
3 KiB
C
/* Copyright (c) 2010
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Permission is granted to use, copy and redistribute this software
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* for noncommercial education and research purposes, so long as no
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* fee is charged, and so long as the name of the University of Michigan
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* is not used in any advertising or publicity pertaining to the use
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* or distribution of this software without specific, written prior
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* authorization. Permission to modify or otherwise create derivative
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* works of this software is not granted.
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*
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* This software is provided as is, without representation or warranty
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* of any kind either express or implied, including without limitation
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* the implied warranties of merchantability, fitness for a particular
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* purpose, or noninfringement. The Regents of the University of
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* Michigan shall not be liable for any damages, including special,
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* indirect, incidental, or consequential damages, with respect to any
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* claim arising out of or in connection with the use of the software,
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* even if it has been or is hereafter advised of the possibility of
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* such damages.
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*/
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#ifndef DELEGATION_H
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#define DELEGATION_H
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#include "nfs41.h"
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/* option to avoid conflicts by returning the delegation */
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#define DELEGATION_RETURN_ON_CONFLICT
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/* reference counting and cleanup */
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void nfs41_delegation_ref(
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IN nfs41_delegation_state *state);
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void nfs41_delegation_deref(
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IN nfs41_delegation_state *state);
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void nfs41_client_delegation_free(
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IN nfs41_client *client);
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/* open delegation */
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int nfs41_delegation_granted(
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IN nfs41_session *session,
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IN nfs41_path_fh *parent,
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IN nfs41_path_fh *file,
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IN open_delegation4 *delegation,
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IN bool_t try_recovery,
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OUT nfs41_delegation_state **deleg_out);
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int nfs41_delegate_open(
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IN nfs41_client *client,
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IN nfs41_path_fh *file,
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IN uint32_t create,
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IN uint32_t mode,
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IN uint32_t access,
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IN uint32_t deny,
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OUT nfs41_delegation_state **deleg_out,
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OUT nfs41_file_info *info);
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int nfs41_delegation_to_open(
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IN nfs41_open_state *open,
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IN bool_t try_recovery);
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/* synchronous delegation return */
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#ifdef DELEGATION_RETURN_ON_CONFLICT
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int nfs41_delegation_return(
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IN nfs41_session *session,
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IN nfs41_path_fh *file,
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IN enum open_delegation_type4 access,
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IN bool_t truncate);
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#else
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static int nfs41_delegation_return(
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IN nfs41_session *session,
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IN nfs41_path_fh *file,
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IN enum open_delegation_type4 access,
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IN bool_t truncate)
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{
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return NFS4_OK;
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}
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#endif
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/* asynchronous delegation recall */
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int nfs41_delegation_recall(
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IN nfs41_client *client,
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IN nfs41_fh *fh,
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IN const stateid4 *stateid,
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IN bool_t truncate);
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/* after client state recovery, return any 'recalled' delegations;
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* must be called under the client's state lock */
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int nfs41_client_delegation_recovery(
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IN nfs41_client *client);
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#endif /* DELEGATION_H */
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