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); 37*e047a10cSTrond Myklebust 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); 4331f09607SAlexandros Batsakis void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags); 44b7391f44STrond Myklebust void nfs_expire_unreferenced_delegations(struct nfs_client *clp); 45adfa6f98SDavid Howells void nfs_handle_cb_pathdown(struct nfs_client *clp); 46d18cc1fdSTrond Myklebust int nfs_client_return_marked_delegations(struct nfs_client *clp); 471da177e4SLinus Torvalds 48adfa6f98SDavid Howells void nfs_delegation_mark_reclaim(struct nfs_client *clp); 49adfa6f98SDavid Howells void nfs_delegation_reap_unclaimed(struct nfs_client *clp); 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds /* NFSv4 delegation-related procedures */ 52e6f81075STrond Myklebust int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); 5313437e12STrond Myklebust int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); 54888e694cSTrond Myklebust int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); 553e4f6290STrond Myklebust int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); 561da177e4SLinus Torvalds 57b7391f44STrond Myklebust void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); 58bd7bf9d5STrond Myklebust int nfs_have_delegation(struct inode *inode, fmode_t flags); 59cae7a073STrond Myklebust 601da177e4SLinus Torvalds #else 61bd7bf9d5STrond Myklebust static inline int nfs_have_delegation(struct inode *inode, fmode_t flags) 621da177e4SLinus Torvalds { 631da177e4SLinus Torvalds return 0; 641da177e4SLinus Torvalds } 65cae7a073STrond Myklebust 66cae7a073STrond Myklebust static inline int nfs_inode_return_delegation(struct inode *inode) 67cae7a073STrond Myklebust { 68cae7a073STrond Myklebust return 0; 69cae7a073STrond Myklebust } 701da177e4SLinus Torvalds #endif 711da177e4SLinus Torvalds 72b4d2314bSTrond Myklebust static inline int nfs_have_delegated_attributes(struct inode *inode) 73b4d2314bSTrond Myklebust { 74b4d2314bSTrond Myklebust return nfs_have_delegation(inode, FMODE_READ) && 75b4d2314bSTrond Myklebust !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); 76b4d2314bSTrond Myklebust } 77b4d2314bSTrond Myklebust 781da177e4SLinus Torvalds #endif 79