2 * linux/fs/nfs/delegation.h
4 * Copyright (c) Trond Myklebust
6 * Definitions pertaining to NFS delegated files
8 #ifndef FS_NFS_DELEGATION_H
9 #define FS_NFS_DELEGATION_H
11 #if defined(CONFIG_NFS_V4)
15 struct nfs_delegation
{
16 struct list_head super_list
;
17 struct rpc_cred
*cred
;
29 NFS_DELEGATION_NEED_RECLAIM
= 0,
30 NFS_DELEGATION_RETURN
,
33 int nfs_inode_set_delegation(struct inode
*inode
, struct rpc_cred
*cred
, struct nfs_openres
*res
);
34 void nfs_inode_reclaim_delegation(struct inode
*inode
, struct rpc_cred
*cred
, struct nfs_openres
*res
);
35 int nfs_inode_return_delegation(struct inode
*inode
);
36 int nfs_async_inode_return_delegation(struct inode
*inode
, const nfs4_stateid
*stateid
);
37 void nfs_inode_return_delegation_noreclaim(struct inode
*inode
);
39 struct inode
*nfs_delegation_find_inode(struct nfs_client
*clp
, const struct nfs_fh
*fhandle
);
40 void nfs_super_return_all_delegations(struct super_block
*sb
);
41 void nfs_expire_all_delegations(struct nfs_client
*clp
);
42 void nfs_handle_cb_pathdown(struct nfs_client
*clp
);
43 void nfs_client_return_marked_delegations(struct nfs_client
*clp
);
45 void nfs_delegation_mark_reclaim(struct nfs_client
*clp
);
46 void nfs_delegation_reap_unclaimed(struct nfs_client
*clp
);
48 /* NFSv4 delegation-related procedures */
49 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
);
50 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
);
51 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
);
52 int nfs4_copy_delegation_stateid(nfs4_stateid
*dst
, struct inode
*inode
);
54 static inline int nfs_have_delegation(struct inode
*inode
, int flags
)
56 struct nfs_delegation
*delegation
;
59 flags
&= FMODE_READ
|FMODE_WRITE
;
61 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
62 if (delegation
!= NULL
&& (delegation
->type
& flags
) == flags
)
69 static inline int nfs_have_delegation(struct inode
*inode
, int flags
)
74 static inline int nfs_inode_return_delegation(struct inode
*inode
)