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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; | |
beb2a5ec | 24 | __u64 change_attr; |
1da177e4 LT |
25 | }; |
26 | ||
27 | int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
28 | void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
90163027 | 29 | int nfs_inode_return_delegation(struct inode *inode); |
1da177e4 LT |
30 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
31 | ||
adfa6f98 | 32 | struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
1da177e4 | 33 | void nfs_return_all_delegations(struct super_block *sb); |
adfa6f98 DH |
34 | void nfs_expire_all_delegations(struct nfs_client *clp); |
35 | void nfs_handle_cb_pathdown(struct nfs_client *clp); | |
1da177e4 | 36 | |
adfa6f98 DH |
37 | void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
38 | void nfs_delegation_reap_unclaimed(struct nfs_client *clp); | |
1da177e4 LT |
39 | |
40 | /* NFSv4 delegation-related procedures */ | |
41 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid); | |
13437e12 | 42 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); |
888e694c | 43 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); |
3e4f6290 | 44 | int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); |
1da177e4 LT |
45 | |
46 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
47 | { | |
48 | flags &= FMODE_READ|FMODE_WRITE; | |
49 | smp_rmb(); | |
50 | if ((NFS_I(inode)->delegation_state & flags) == flags) | |
51 | return 1; | |
52 | return 0; | |
53 | } | |
cae7a073 | 54 | |
1da177e4 LT |
55 | #else |
56 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
57 | { | |
58 | return 0; | |
59 | } | |
cae7a073 TM |
60 | |
61 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
62 | { | |
63 | return 0; | |
64 | } | |
1da177e4 LT |
65 | #endif |
66 | ||
67 | #endif |