projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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; |
| 8383e460 | 25 | struct rcu_head rcu; |
| 1da177e4 LT |
26 | }; |
| 27 | ||
| 28 | int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
| 29 | void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); | |
| 90163027 | 30 | int nfs_inode_return_delegation(struct inode *inode); |
| 1da177e4 | 31 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
| e6f81075 | 32 | void nfs_inode_return_delegation_noreclaim(struct inode *inode); |
| 1da177e4 | 33 | |
| adfa6f98 | 34 | struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
| 1da177e4 | 35 | void nfs_return_all_delegations(struct super_block *sb); |
| adfa6f98 DH |
36 | void nfs_expire_all_delegations(struct nfs_client *clp); |
| 37 | void nfs_handle_cb_pathdown(struct nfs_client *clp); | |
| 1da177e4 | 38 | |
| adfa6f98 DH |
39 | void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
| 40 | void nfs_delegation_reap_unclaimed(struct nfs_client *clp); | |
| 1da177e4 LT |
41 | |
| 42 | /* NFSv4 delegation-related procedures */ | |
| e6f81075 | 43 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); |
| 13437e12 | 44 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); |
| 888e694c | 45 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); |
| 3e4f6290 | 46 | int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); |
| 1da177e4 LT |
47 | |
| 48 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
| 49 | { | |
| 8383e460 TM |
50 | struct nfs_delegation *delegation; |
| 51 | int ret = 0; | |
| 52 | ||
| 1da177e4 | 53 | flags &= FMODE_READ|FMODE_WRITE; |
| 8383e460 TM |
54 | rcu_read_lock(); |
| 55 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
| 56 | if (delegation != NULL && (delegation->type & flags) == flags) | |
| 57 | ret = 1; | |
| 58 | rcu_read_unlock(); | |
| 59 | return ret; | |
| 1da177e4 | 60 | } |
| cae7a073 | 61 | |
| 1da177e4 LT |
62 | #else |
| 63 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
| 64 | { | |
| 65 | return 0; | |
| 66 | } | |
| cae7a073 TM |
67 | |
| 68 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
| 69 | { | |
| 70 | return 0; | |
| 71 | } | |
| 1da177e4 LT |
72 | #endif |
| 73 | ||
| 74 | #endif |