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;
23 #define NFS_DELEGATION_NEED_RECLAIM 0
29 int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
30 void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
31 int nfs_inode_return_delegation(struct inode *inode);
32 int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
33 void nfs_inode_return_delegation_noreclaim(struct inode *inode);
35 struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
36 void nfs_return_all_delegations(struct super_block *sb);
37 void nfs_expire_all_delegations(struct nfs_client *clp);
38 void nfs_handle_cb_pathdown(struct nfs_client *clp);
40 void nfs_delegation_mark_reclaim(struct nfs_client *clp);
41 void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
43 /* NFSv4 delegation-related procedures */
44 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync);
45 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
46 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
47 int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
49 static inline int nfs_have_delegation(struct inode *inode, int flags)
51 struct nfs_delegation *delegation;
54 flags &= FMODE_READ|FMODE_WRITE;
56 delegation = rcu_dereference(NFS_I(inode)->delegation);
57 if (delegation != NULL && (delegation->type & flags) == flags)
64 static inline int nfs_have_delegation(struct inode *inode, int flags)
69 static inline int nfs_inode_return_delegation(struct inode *inode)