2005-04-17 00:20:36 +02:00
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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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#if defined(CONFIG_NFS_V4)
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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 21:21:53 +01:00
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fmode_t type;
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2005-04-17 00:20:36 +02:00
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loff_t maxsize;
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2006-01-03 09:55:37 +01:00
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__u64 change_attr;
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2008-12-23 21:21:39 +01:00
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unsigned long flags;
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2008-12-23 21:21:38 +01:00
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spinlock_t lock;
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2007-07-06 21:12:04 +02:00
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struct rcu_head rcu;
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2005-04-17 00:20:36 +02:00
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};
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2008-12-23 21:21:46 +01:00
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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 21:21:52 +01:00
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NFS_DELEGATION_REFERENCED,
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2008-12-23 21:21:46 +01:00
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};
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2005-04-17 00:20:36 +02:00
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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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2007-07-05 20:55:18 +02:00
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int nfs_inode_return_delegation(struct inode *inode);
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2010-06-16 15:52:27 +02:00
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
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2008-01-25 00:14:34 +01:00
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void nfs_inode_return_delegation_noreclaim(struct inode *inode);
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2005-04-17 00:20:36 +02:00
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2006-08-23 02:06:08 +02:00
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struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
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2008-12-23 21:21:46 +01:00
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void nfs_super_return_all_delegations(struct super_block *sb);
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2006-08-23 02:06:08 +02:00
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void nfs_expire_all_delegations(struct nfs_client *clp);
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2009-12-05 19:27:02 +01:00
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void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags);
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2008-12-23 21:21:52 +01:00
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void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
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2009-12-03 14:10:17 +01:00
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int nfs_client_return_marked_delegations(struct nfs_client *clp);
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2010-12-24 02:33:04 +01:00
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int nfs_delegations_present(struct nfs_client *clp);
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2012-03-06 01:56:44 +01:00
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void nfs_remove_bad_delegation(struct inode *inode);
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2005-04-17 00:20:36 +02:00
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2006-08-23 02:06:08 +02:00
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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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2005-04-17 00:20:36 +02:00
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/* NFSv4 delegation-related procedures */
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2008-01-25 00:14:34 +01:00
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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 21:10:43 +02:00
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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 21:38:11 +01:00
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int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
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2012-03-08 23:16:12 +01:00
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bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags);
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2005-04-17 00:20:36 +02:00
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2008-12-23 21:21:52 +01:00
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void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
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2008-12-23 21:21:53 +01:00
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int nfs_have_delegation(struct inode *inode, fmode_t flags);
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2005-10-18 23:20:19 +02:00
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2005-04-17 00:20:36 +02:00
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#else
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2008-12-23 21:21:53 +01:00
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static inline int nfs_have_delegation(struct inode *inode, fmode_t flags)
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2005-04-17 00:20:36 +02:00
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{
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return 0;
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}
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2005-10-18 23:20:19 +02:00
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static inline int nfs_inode_return_delegation(struct inode *inode)
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{
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return 0;
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}
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2005-04-17 00:20:36 +02:00
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#endif
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2010-03-10 21:21:44 +01:00
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static inline int nfs_have_delegated_attributes(struct inode *inode)
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{
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return nfs_have_delegation(inode, FMODE_READ) &&
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!(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED);
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}
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2005-04-17 00:20:36 +02:00
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#endif
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