Commit | Line | Data |
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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; | |
bd7bf9d5 | 20 | fmode_t type; |
1da177e4 | 21 | loff_t maxsize; |
beb2a5ec | 22 | __u64 change_attr; |
15c831bf | 23 | unsigned long flags; |
34310430 | 24 | spinlock_t lock; |
8383e460 | 25 | struct rcu_head rcu; |
1da177e4 LT |
26 | }; |
27 | ||
515d8611 TM |
28 | enum { |
29 | NFS_DELEGATION_NEED_RECLAIM = 0, | |
30 | NFS_DELEGATION_RETURN, | |
b7391f44 | 31 | NFS_DELEGATION_REFERENCED, |
515d8611 TM |
32 | }; |
33 | ||
1da177e4 LT |
34 | int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); |
35 | void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
90163027 | 36 | int nfs_inode_return_delegation(struct inode *inode); |
e047a10c | 37 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
e6f81075 | 38 | void nfs_inode_return_delegation_noreclaim(struct inode *inode); |
1da177e4 | 39 | |
adfa6f98 | 40 | struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
515d8611 | 41 | void nfs_super_return_all_delegations(struct super_block *sb); |
adfa6f98 | 42 | void nfs_expire_all_delegations(struct nfs_client *clp); |
31f09607 | 43 | void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags); |
b7391f44 | 44 | void nfs_expire_unreferenced_delegations(struct nfs_client *clp); |
d18cc1fd | 45 | int nfs_client_return_marked_delegations(struct nfs_client *clp); |
d3978bb3 | 46 | int nfs_delegations_present(struct nfs_client *clp); |
a1d0b5ee | 47 | void nfs_remove_bad_delegation(struct inode *inode); |
1da177e4 | 48 | |
adfa6f98 DH |
49 | void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
50 | void nfs_delegation_reap_unclaimed(struct nfs_client *clp); | |
1da177e4 LT |
51 | |
52 | /* NFSv4 delegation-related procedures */ | |
e6f81075 | 53 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); |
13437e12 | 54 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); |
888e694c | 55 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); |
0032a7a7 | 56 | bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags); |
1da177e4 | 57 | |
b7391f44 | 58 | void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); |
bd7bf9d5 | 59 | int nfs_have_delegation(struct inode *inode, fmode_t flags); |
cae7a073 | 60 | |
1da177e4 | 61 | #else |
bd7bf9d5 | 62 | static inline int nfs_have_delegation(struct inode *inode, fmode_t flags) |
1da177e4 LT |
63 | { |
64 | return 0; | |
65 | } | |
cae7a073 TM |
66 | |
67 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
68 | { | |
69 | return 0; | |
70 | } | |
1da177e4 LT |
71 | #endif |
72 | ||
b4d2314b TM |
73 | static 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 | ||
1da177e4 | 79 | #endif |