Blame - fs/nfs/delegation.h - hafnium/third_party/linux

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Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	1	/* SPDX-License-Identifier: GPL-2.0 */
				2	/*
				3	* linux/fs/nfs/delegation.h
				4	*
				5	* Copyright (c) Trond Myklebust
				6	*
				7	* Definitions pertaining to NFS delegated files
				8	*/
				9	#ifndef FS_NFS_DELEGATION_H
				10	#define FS_NFS_DELEGATION_H
				11
				12	#if IS_ENABLED(CONFIG_NFS_V4)
				13	/*
				14	* NFSv4 delegation
				15	*/
				16	struct nfs_delegation {
				17	struct list_head super_list;
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	18	const struct cred *cred;
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	19	struct inode *inode;
				20	nfs4_stateid stateid;
				21	fmode_t type;
				22	unsigned long pagemod_limit;
				23	__u64 change_attr;
				24	unsigned long flags;
				25	spinlock_t lock;
				26	struct rcu_head rcu;
				27	};
				28
				29	enum {
				30	NFS_DELEGATION_NEED_RECLAIM = 0,
				31	NFS_DELEGATION_RETURN,
				32	NFS_DELEGATION_RETURN_IF_CLOSED,
				33	NFS_DELEGATION_REFERENCED,
				34	NFS_DELEGATION_RETURNING,
				35	NFS_DELEGATION_REVOKED,
				36	NFS_DELEGATION_TEST_EXPIRED,
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	37	NFS_DELEGATION_INODE_FREEING,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	38	};
				39
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	40	int nfs_inode_set_delegation(struct inode inode, const struct cred cred,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	41	fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	42	void nfs_inode_reclaim_delegation(struct inode inode, const struct cred cred,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	43	fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit);
				44	int nfs4_inode_return_delegation(struct inode *inode);
				45	int nfs_async_inode_return_delegation(struct inode inode, const nfs4_stateid stateid);
				46	void nfs_inode_return_delegation_noreclaim(struct inode *inode);
				47
				48	struct inode nfs_delegation_find_inode(struct nfs_client clp, const struct nfs_fh *fhandle);
				49	void nfs_server_return_all_delegations(struct nfs_server *);
				50	void nfs_expire_all_delegations(struct nfs_client *clp);
				51	void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags);
				52	void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
				53	int nfs_client_return_marked_delegations(struct nfs_client *clp);
				54	int nfs_delegations_present(struct nfs_client *clp);
				55	void nfs_remove_bad_delegation(struct inode inode, const nfs4_stateid stateid);
				56
				57	void nfs_delegation_mark_reclaim(struct nfs_client *clp);
				58	void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
				59
				60	void nfs_mark_test_expired_all_delegations(struct nfs_client *clp);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	61	void nfs_test_expired_all_delegations(struct nfs_client *clp);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	62	void nfs_reap_expired_delegations(struct nfs_client *clp);
				63
				64	/* NFSv4 delegation-related procedures */
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	65	int nfs4_proc_delegreturn(struct inode inode, const struct cred cred, const nfs4_stateid *stateid, int issync);
				66	int nfs4_open_delegation_recall(struct nfs_open_context ctx, struct nfs4_state state, const nfs4_stateid *stateid);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	67	int nfs4_lock_delegation_recall(struct file_lock fl, struct nfs4_state state, const nfs4_stateid *stateid);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	68	bool nfs4_copy_delegation_stateid(struct inode inode, fmode_t flags, nfs4_stateid dst, const struct cred **cred);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	69	bool nfs4_refresh_delegation_stateid(nfs4_stateid dst, struct inode inode);
				70
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame]	71	struct nfs_delegation nfs4_get_valid_delegation(const struct inode inode);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	72	void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
				73	int nfs4_have_delegation(struct inode *inode, fmode_t flags);
				74	int nfs4_check_delegation(struct inode *inode, fmode_t flags);
				75	bool nfs4_delegation_flush_on_close(const struct inode *inode);
				76	void nfs_inode_find_delegation_state_and_recover(struct inode *inode,
				77	const nfs4_stateid *stateid);
				78	int nfs4_inode_make_writeable(struct inode *inode);
				79
				80	#endif
				81
				82	static inline int nfs_have_delegated_attributes(struct inode *inode)
				83	{
				84	return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) &&
				85	!(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED);
				86	}
				87
				88	#endif