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 1189d77c8fSBryan Schumaker #if IS_ENABLED(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, 31b757144fSTrond Myklebust NFS_DELEGATION_RETURN_IF_CLOSED, 32b7391f44STrond Myklebust NFS_DELEGATION_REFERENCED, 33d25be546STrond Myklebust NFS_DELEGATION_RETURNING, 34515d8611STrond Myklebust }; 35515d8611STrond Myklebust 361da177e4SLinus Torvalds int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); 371da177e4SLinus Torvalds void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); 3857ec14c5SBryan Schumaker int nfs4_inode_return_delegation(struct inode *inode); 39e047a10cSTrond Myklebust int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); 40e6f81075STrond Myklebust void nfs_inode_return_delegation_noreclaim(struct inode *inode); 411da177e4SLinus Torvalds 42adfa6f98SDavid Howells struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); 43eeebf916SBryan Schumaker void nfs_server_return_all_delegations(struct nfs_server *); 44adfa6f98SDavid Howells void nfs_expire_all_delegations(struct nfs_client *clp); 45*826e0013STrond Myklebust void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); 46b7391f44STrond Myklebust void nfs_expire_unreferenced_delegations(struct nfs_client *clp); 47d18cc1fdSTrond Myklebust int nfs_client_return_marked_delegations(struct nfs_client *clp); 48d3978bb3SChuck Lever int nfs_delegations_present(struct nfs_client *clp); 49a1d0b5eeSTrond Myklebust void nfs_remove_bad_delegation(struct inode *inode); 501da177e4SLinus Torvalds 51adfa6f98SDavid Howells void nfs_delegation_mark_reclaim(struct nfs_client *clp); 52adfa6f98SDavid Howells void nfs_delegation_reap_unclaimed(struct nfs_client *clp); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* NFSv4 delegation-related procedures */ 55e6f81075STrond Myklebust int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); 5613437e12STrond Myklebust int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); 57db4f2e63STrond Myklebust int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); 580032a7a7STrond Myklebust bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags); 591da177e4SLinus Torvalds 60b7391f44STrond Myklebust void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); 61011e2a7fSBryan Schumaker int nfs4_have_delegation(struct inode *inode, fmode_t flags); 62cae7a073STrond Myklebust 631da177e4SLinus Torvalds #endif 641da177e4SLinus Torvalds 65b4d2314bSTrond Myklebust static inline int nfs_have_delegated_attributes(struct inode *inode) 66b4d2314bSTrond Myklebust { 67011e2a7fSBryan Schumaker return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) && 68b4d2314bSTrond Myklebust !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); 69b4d2314bSTrond Myklebust } 70b4d2314bSTrond Myklebust 711da177e4SLinus Torvalds #endif 72