| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
| 28 | int nfs_inode_return_delegation(struct inode *inode); |
| 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 | } |
| 50 | #else |
| 51 | static inline int nfs_have_delegation(struct inode *inode, int flags) |
| 52 | { |
| 53 | return 0; |
| 54 | } |
| 55 | #endif |
| 56 | |
| 57 | #endif |