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; | |
| 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); | |
| cae7a073 | 28 | int __nfs_inode_return_delegation(struct inode *inode); |
| 1da177e4 LT |
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 | } | |
| cae7a073 TM |
50 | |
| 51 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
| 52 | { | |
| 53 | int err = 0; | |
| 54 | ||
| 55 | if (NFS_I(inode)->delegation != NULL) | |
| 56 | err = __nfs_inode_return_delegation(inode); | |
| 57 | return err; | |
| 58 | } | |
| 1da177e4 LT |
59 | #else |
| 60 | static inline int nfs_have_delegation(struct inode *inode, int flags) | |
| 61 | { | |
| 62 | return 0; | |
| 63 | } | |
| cae7a073 TM |
64 | |
| 65 | static inline int nfs_inode_return_delegation(struct inode *inode) | |
| 66 | { | |
| 67 | return 0; | |
| 68 | } | |
| 1da177e4 LT |
69 | #endif |
| 70 | ||
| 71 | #endif |