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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/delegation.h | |
3 | * | |
4 | * Copyright (c) Trond Myklebust | |
5 | * | |
6 | * Definitions pertaining to NFS delegated files | |
7 | */ | |
8 | #ifndef FS_NFS_DELEGATION_H | |
9 | #define FS_NFS_DELEGATION_H | |
10 | ||
11 | #if defined(CONFIG_NFS_V4) | |
12 | /* | |
13 | * NFSv4 delegation | |
14 | */ | |
15 | struct nfs_delegation { | |
16 | struct list_head super_list; | |
17 | struct rpc_cred *cred; | |
18 | struct inode *inode; | |
19 | nfs4_stateid stateid; | |
20 | int type; | |
21 | #define NFS_DELEGATION_NEED_RECLAIM 1 | |
22 | long flags; | |
23 | loff_t maxsize; | |
24 | }; | |
25 | ||
26 | int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
27 | void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
28 | int nfs_inode_return_delegation(struct inode *inode); | |
29 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); | |
30 | ||
31 | struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle); | |
32 | void nfs_return_all_delegations(struct super_block *sb); | |
33 | void nfs_handle_cb_pathdown(struct nfs4_client *clp); | |
34 | ||
35 | void nfs_delegation_mark_reclaim(struct nfs4_client *clp); | |
36 | void nfs_delegation_reap_unclaimed(struct nfs4_client *clp); | |
37 | ||
38 | /* NFSv4 delegation-related procedures */ | |
39 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid); | |
40 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state); | |
41 | ||
42 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
43 | { | |
44 | flags &= FMODE_READ|FMODE_WRITE; | |
45 | smp_rmb(); | |
46 | if ((NFS_I(inode)->delegation_state & flags) == flags) | |
47 | return 1; | |
48 | return 0; | |
49 | } | |
50 | #else | |
51 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
52 | { | |
53 | return 0; | |
54 | } | |
55 | #endif | |
56 | ||
57 | #endif |