11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfs/delegation.h 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) Trond Myklebust 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Definitions pertaining to NFS delegated files 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds #ifndef FS_NFS_DELEGATION_H 91da177e4SLinus Torvalds #define FS_NFS_DELEGATION_H 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #if defined(CONFIG_NFS_V4) 121da177e4SLinus Torvalds /* 131da177e4SLinus Torvalds * NFSv4 delegation 141da177e4SLinus Torvalds */ 151da177e4SLinus Torvalds struct nfs_delegation { 161da177e4SLinus Torvalds struct list_head super_list; 171da177e4SLinus Torvalds struct rpc_cred *cred; 181da177e4SLinus Torvalds struct inode *inode; 191da177e4SLinus Torvalds nfs4_stateid stateid; 20bd7bf9d5STrond Myklebust fmode_t type; 211da177e4SLinus Torvalds loff_t maxsize; 22beb2a5ecSTrond Myklebust __u64 change_attr; 2315c831bfSTrond Myklebust unsigned long flags; 2434310430STrond Myklebust spinlock_t lock; 258383e460STrond Myklebust struct rcu_head rcu; 261da177e4SLinus Torvalds }; 271da177e4SLinus Torvalds 28515d8611STrond Myklebust enum { 29515d8611STrond Myklebust NFS_DELEGATION_NEED_RECLAIM = 0, 30515d8611STrond Myklebust NFS_DELEGATION_RETURN, 31b7391f44STrond Myklebust NFS_DELEGATION_REFERENCED, 32515d8611STrond Myklebust }; 33515d8611STrond Myklebust 341da177e4SLinus Torvalds int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); 351da177e4SLinus Torvalds void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); 3690163027STrond Myklebust int nfs_inode_return_delegation(struct inode *inode); 371da177e4SLinus Torvalds int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); 38e6f81075STrond Myklebust void nfs_inode_return_delegation_noreclaim(struct inode *inode); 391da177e4SLinus Torvalds 40adfa6f98SDavid Howells struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); 41515d8611STrond Myklebust void nfs_super_return_all_delegations(struct super_block *sb); 42adfa6f98SDavid Howells void nfs_expire_all_delegations(struct nfs_client *clp); 43b7391f44STrond Myklebust void nfs_expire_unreferenced_delegations(struct nfs_client *clp); 44adfa6f98SDavid Howells void nfs_handle_cb_pathdown(struct nfs_client *clp); 45*d18cc1fdSTrond Myklebust int nfs_client_return_marked_delegations(struct nfs_client *clp); 461da177e4SLinus Torvalds 47adfa6f98SDavid Howells void nfs_delegation_mark_reclaim(struct nfs_client *clp); 48adfa6f98SDavid Howells void nfs_delegation_reap_unclaimed(struct nfs_client *clp); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* NFSv4 delegation-related procedures */ 51e6f81075STrond Myklebust int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); 5213437e12STrond Myklebust int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); 53888e694cSTrond Myklebust int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); 543e4f6290STrond Myklebust int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); 551da177e4SLinus Torvalds 56b7391f44STrond Myklebust void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); 57bd7bf9d5STrond Myklebust int nfs_have_delegation(struct inode *inode, fmode_t flags); 58cae7a073STrond Myklebust 591da177e4SLinus Torvalds #else 60bd7bf9d5STrond Myklebust static inline int nfs_have_delegation(struct inode *inode, fmode_t flags) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds return 0; 631da177e4SLinus Torvalds } 64cae7a073STrond Myklebust 65cae7a073STrond Myklebust static inline int nfs_inode_return_delegation(struct inode *inode) 66cae7a073STrond Myklebust { 67cae7a073STrond Myklebust return 0; 68cae7a073STrond Myklebust } 691da177e4SLinus Torvalds #endif 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds #endif 72