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91 lines
3.5 KiB
91 lines
3.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/fs/nfs/delegation.h |
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* |
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* Copyright (c) Trond Myklebust |
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* |
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* Definitions pertaining to NFS delegated files |
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*/ |
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#ifndef FS_NFS_DELEGATION_H |
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#define FS_NFS_DELEGATION_H |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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/* |
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* NFSv4 delegation |
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*/ |
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struct nfs_delegation { |
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struct list_head super_list; |
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const struct cred *cred; |
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struct inode *inode; |
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nfs4_stateid stateid; |
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fmode_t type; |
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unsigned long pagemod_limit; |
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__u64 change_attr; |
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unsigned long flags; |
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refcount_t refcount; |
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spinlock_t lock; |
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struct rcu_head rcu; |
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}; |
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enum { |
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NFS_DELEGATION_NEED_RECLAIM = 0, |
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NFS_DELEGATION_RETURN, |
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NFS_DELEGATION_RETURN_IF_CLOSED, |
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NFS_DELEGATION_REFERENCED, |
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NFS_DELEGATION_RETURNING, |
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NFS_DELEGATION_REVOKED, |
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NFS_DELEGATION_TEST_EXPIRED, |
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NFS_DELEGATION_INODE_FREEING, |
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NFS_DELEGATION_RETURN_DELAYED, |
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}; |
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int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred, |
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fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); |
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void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred, |
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fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); |
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int nfs4_inode_return_delegation(struct inode *inode); |
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void nfs4_inode_return_delegation_on_close(struct inode *inode); |
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
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void nfs_inode_evict_delegation(struct inode *inode); |
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struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
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void nfs_server_return_all_delegations(struct nfs_server *); |
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void nfs_expire_all_delegations(struct nfs_client *clp); |
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void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); |
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void nfs_expire_unreferenced_delegations(struct nfs_client *clp); |
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int nfs_client_return_marked_delegations(struct nfs_client *clp); |
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int nfs_delegations_present(struct nfs_client *clp); |
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void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid); |
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void nfs_delegation_mark_returned(struct inode *inode, const nfs4_stateid *stateid); |
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void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
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void nfs_delegation_reap_unclaimed(struct nfs_client *clp); |
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void nfs_mark_test_expired_all_delegations(struct nfs_client *clp); |
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void nfs_test_expired_all_delegations(struct nfs_client *clp); |
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void nfs_reap_expired_delegations(struct nfs_client *clp); |
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/* NFSv4 delegation-related procedures */ |
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int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync); |
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int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); |
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int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); |
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bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, const struct cred **cred); |
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bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode); |
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struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode); |
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void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); |
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int nfs4_have_delegation(struct inode *inode, fmode_t flags); |
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int nfs4_check_delegation(struct inode *inode, fmode_t flags); |
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bool nfs4_delegation_flush_on_close(const struct inode *inode); |
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void nfs_inode_find_delegation_state_and_recover(struct inode *inode, |
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const nfs4_stateid *stateid); |
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int nfs4_inode_make_writeable(struct inode *inode); |
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#endif |
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static inline int nfs_have_delegated_attributes(struct inode *inode) |
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{ |
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return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ); |
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} |
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#endif
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