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8#ifndef FS_NFS_DELEGATION_H
9#define FS_NFS_DELEGATION_H
10
11#if defined(CONFIG_NFS_V4)
12
13
14
15struct nfs_delegation {
16 struct list_head super_list;
17 struct rpc_cred *cred;
18 struct inode *inode;
19 nfs4_stateid stateid;
20 fmode_t type;
21 loff_t maxsize;
22 __u64 change_attr;
23 unsigned long flags;
24 spinlock_t lock;
25 struct rcu_head rcu;
26};
27
28enum {
29 NFS_DELEGATION_NEED_RECLAIM = 0,
30 NFS_DELEGATION_RETURN,
31 NFS_DELEGATION_REFERENCED,
32};
33
34int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
35void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
36int nfs_inode_return_delegation(struct inode *inode);
37int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
38void nfs_inode_return_delegation_noreclaim(struct inode *inode);
39
40struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
41void nfs_super_return_all_delegations(struct super_block *sb);
42void nfs_expire_all_delegations(struct nfs_client *clp);
43void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags);
44void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
45void nfs_handle_cb_pathdown(struct nfs_client *clp);
46int nfs_client_return_marked_delegations(struct nfs_client *clp);
47int nfs_delegations_present(struct nfs_client *clp);
48
49void nfs_delegation_mark_reclaim(struct nfs_client *clp);
50void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
51
52
53int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync);
54int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
55int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
56int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
57
58void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
59int nfs_have_delegation(struct inode *inode, fmode_t flags);
60
61#else
62static inline int nfs_have_delegation(struct inode *inode, fmode_t flags)
63{
64 return 0;
65}
66
67static inline int nfs_inode_return_delegation(struct inode *inode)
68{
69 return 0;
70}
71#endif
72
73static inline int nfs_have_delegated_attributes(struct inode *inode)
74{
75 return nfs_have_delegation(inode, FMODE_READ) &&
76 !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED);
77}
78
79#endif
80
