2005-04-16 16:20:36 -06:00
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/*
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* linux/fs/nfs/delegation.h
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*
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* Copyright (c) Trond Myklebust
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*
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* Definitions pertaining to NFS delegated files
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*/
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#ifndef FS_NFS_DELEGATION_H
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#define FS_NFS_DELEGATION_H
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2012-07-30 14:05:25 -06:00
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#if IS_ENABLED(CONFIG_NFS_V4)
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2005-04-16 16:20:36 -06:00
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/*
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* NFSv4 delegation
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*/
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struct nfs_delegation {
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struct list_head super_list;
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struct rpc_cred *cred;
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struct inode *inode;
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nfs4_stateid stateid;
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2008-12-23 13:21:53 -07:00
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fmode_t type;
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2005-04-16 16:20:36 -06:00
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loff_t maxsize;
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2006-01-03 01:55:37 -07:00
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__u64 change_attr;
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2008-12-23 13:21:39 -07:00
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unsigned long flags;
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2008-12-23 13:21:38 -07:00
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spinlock_t lock;
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2007-07-06 13:12:04 -06:00
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struct rcu_head rcu;
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2005-04-16 16:20:36 -06:00
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};
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2008-12-23 13:21:46 -07:00
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enum {
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NFS_DELEGATION_NEED_RECLAIM = 0,
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NFS_DELEGATION_RETURN,
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2008-12-23 13:21:52 -07:00
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NFS_DELEGATION_REFERENCED,
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2008-12-23 13:21:46 -07:00
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};
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2005-04-16 16:20:36 -06:00
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int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
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void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
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2012-06-20 13:53:44 -06:00
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int nfs4_inode_return_delegation(struct inode *inode);
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2010-06-16 07:52:27 -06:00
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
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2008-01-24 16:14:34 -07:00
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void nfs_inode_return_delegation_noreclaim(struct inode *inode);
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2005-04-16 16:20:36 -06:00
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2006-08-22 18:06:08 -06:00
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struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
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2012-06-20 13:53:41 -06:00
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void nfs_server_return_all_delegations(struct nfs_server *);
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2006-08-22 18:06:08 -06:00
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void nfs_expire_all_delegations(struct nfs_client *clp);
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2009-12-05 11:27:02 -07:00
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void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags);
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2008-12-23 13:21:52 -07:00
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void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
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2009-12-03 06:10:17 -07:00
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int nfs_client_return_marked_delegations(struct nfs_client *clp);
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2010-12-23 18:33:04 -07:00
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int nfs_delegations_present(struct nfs_client *clp);
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2012-03-05 17:56:44 -07:00
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void nfs_remove_bad_delegation(struct inode *inode);
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2005-04-16 16:20:36 -06:00
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2006-08-22 18:06:08 -06:00
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void nfs_delegation_mark_reclaim(struct nfs_client *clp);
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void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
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2005-04-16 16:20:36 -06:00
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/* NFSv4 delegation-related procedures */
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2008-01-24 16:14:34 -07:00
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int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync);
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2007-07-06 13:10:43 -06:00
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int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
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2005-11-04 13:38:11 -07:00
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int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
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2012-03-08 15:16:12 -07:00
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bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags);
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2005-04-16 16:20:36 -06:00
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2008-12-23 13:21:52 -07:00
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void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
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2012-06-20 13:53:43 -06:00
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int nfs4_have_delegation(struct inode *inode, fmode_t flags);
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2005-10-18 15:20:19 -06:00
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2005-04-16 16:20:36 -06:00
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#endif
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2010-03-10 13:21:44 -07:00
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static inline int nfs_have_delegated_attributes(struct inode *inode)
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{
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2012-06-20 13:53:43 -06:00
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return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) &&
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2010-03-10 13:21:44 -07:00
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!(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED);
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}
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2005-04-16 16:20:36 -06:00
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#endif
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