| 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 | |
| Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 11 | #if IS_ENABLED(CONFIG_NFS_V4) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
| Trond Myklebust | bd7bf9d | 2008-12-23 15:21:53 -0500 | [diff] [blame] | 20 | fmode_t type; |
| Trond Myklebust | 7d160a6 | 2015-09-05 19:06:57 -0400 | [diff] [blame] | 21 | unsigned long pagemod_limit; |
| Trond Myklebust | beb2a5e | 2006-01-03 09:55:37 +0100 | [diff] [blame] | 22 | __u64 change_attr; |
| Trond Myklebust | 15c831b | 2008-12-23 15:21:39 -0500 | [diff] [blame] | 23 | unsigned long flags; |
| Trond Myklebust | 3431043 | 2008-12-23 15:21:38 -0500 | [diff] [blame] | 24 | spinlock_t lock; |
| Trond Myklebust | 8383e46 | 2007-07-06 15:12:04 -0400 | [diff] [blame] | 25 | struct rcu_head rcu; |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | }; |
| 27 | |
| Trond Myklebust | 515d861 | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 28 | enum { |
| 29 | NFS_DELEGATION_NEED_RECLAIM = 0, |
| 30 | NFS_DELEGATION_RETURN, |
| Trond Myklebust | b757144 | 2013-04-03 14:33:49 -0400 | [diff] [blame] | 31 | NFS_DELEGATION_RETURN_IF_CLOSED, |
| Trond Myklebust | b7391f4 | 2008-12-23 15:21:52 -0500 | [diff] [blame] | 32 | NFS_DELEGATION_REFERENCED, |
| Trond Myklebust | d25be54 | 2013-02-05 11:43:28 -0500 | [diff] [blame] | 33 | NFS_DELEGATION_RETURNING, |
| Trond Myklebust | 869f9df | 2014-11-10 18:43:56 -0500 | [diff] [blame] | 34 | NFS_DELEGATION_REVOKED, |
| Trond Myklebust | 515d861 | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 35 | }; |
| 36 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); |
| 38 | void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); |
| Bryan Schumaker | 57ec14c | 2012-06-20 15:53:44 -0400 | [diff] [blame] | 39 | int nfs4_inode_return_delegation(struct inode *inode); |
| Trond Myklebust | e047a10 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 40 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
| Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 41 | void nfs_inode_return_delegation_noreclaim(struct inode *inode); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 43 | struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
| Bryan Schumaker | eeebf91 | 2012-06-20 15:53:41 -0400 | [diff] [blame] | 44 | void nfs_server_return_all_delegations(struct nfs_server *); |
| David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 45 | void nfs_expire_all_delegations(struct nfs_client *clp); |
| Trond Myklebust | 826e001 | 2013-04-03 19:27:52 -0400 | [diff] [blame] | 46 | void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); |
| Trond Myklebust | b7391f4 | 2008-12-23 15:21:52 -0500 | [diff] [blame] | 47 | void nfs_expire_unreferenced_delegations(struct nfs_client *clp); |
| Trond Myklebust | d18cc1f | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 48 | int nfs_client_return_marked_delegations(struct nfs_client *clp); |
| Chuck Lever | d3978bb | 2010-12-24 01:33:04 +0000 | [diff] [blame] | 49 | int nfs_delegations_present(struct nfs_client *clp); |
| Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 50 | void nfs_remove_bad_delegation(struct inode *inode); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 52 | void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
| 53 | void nfs_delegation_reap_unclaimed(struct nfs_client *clp); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | /* NFSv4 delegation-related procedures */ |
| Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 56 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); |
| Trond Myklebust | 24311f8 | 2015-09-20 10:50:17 -0400 | [diff] [blame^] | 57 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid, fmode_t type); |
| Trond Myklebust | db4f2e6 | 2013-04-01 15:56:46 -0400 | [diff] [blame] | 58 | int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); |
| Trond Myklebust | 0032a7a | 2012-03-08 17:16:12 -0500 | [diff] [blame] | 59 | bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| Trond Myklebust | b7391f4 | 2008-12-23 15:21:52 -0500 | [diff] [blame] | 61 | void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); |
| Bryan Schumaker | 011e2a7 | 2012-06-20 15:53:43 -0400 | [diff] [blame] | 62 | int nfs4_have_delegation(struct inode *inode, fmode_t flags); |
| Peng Tao | 15bb3af | 2014-07-03 13:05:00 +0800 | [diff] [blame] | 63 | int nfs4_check_delegation(struct inode *inode, fmode_t flags); |
| Trond Myklebust | 5445b1f | 2015-09-05 19:06:58 -0400 | [diff] [blame] | 64 | bool nfs4_delegation_flush_on_close(const struct inode *inode); |
| Trond Myklebust | cae7a07 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 65 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #endif |
| 67 | |
| Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 68 | static inline int nfs_have_delegated_attributes(struct inode *inode) |
| 69 | { |
| Bryan Schumaker | 011e2a7 | 2012-06-20 15:53:43 -0400 | [diff] [blame] | 70 | return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) && |
| Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 71 | !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); |
| 72 | } |
| 73 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #endif |