projects / deliverable / 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; |
| 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); | |
| cae7a073 | 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 | ||
| 32 | struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle); | |
| 33 | void nfs_return_all_delegations(struct super_block *sb); | |
| 58d9714a | 34 | void nfs_expire_all_delegations(struct nfs4_client *clp); |
| 1da177e4 LT |
35 | void nfs_handle_cb_pathdown(struct nfs4_client *clp); |
| 36 | ||
| 37 | void nfs_delegation_mark_reclaim(struct nfs4_client *clp); | |
| 38 | void nfs_delegation_reap_unclaimed(struct nfs4_client *clp); | |
| 39 | ||
| 40 | /* NFSv4 delegation-related procedures */ | |
| 41 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid); | |
| 42 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state); | |
| 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 TM |
54 | |
| 55 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
| 56 | { | |
| 57 | int err = 0; | |
| 58 | ||
| 59 | if (NFS_I(inode)->delegation != NULL) | |
| 60 | err = __nfs_inode_return_delegation(inode); | |
| 61 | return err; | |
| 62 | } | |
| 1da177e4 LT |
63 | #else |
| 64 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
| 65 | { | |
| 66 | return 0; | |
| 67 | } | |
| cae7a073 TM |
68 | |
| 69 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
| 70 | { | |
| 71 | return 0; | |
| 72 | } | |
| 1da177e4 LT |
73 | #endif |
| 74 | ||
| 75 | #endif |