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v6.9.4
 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 */
16struct nfs_delegation {
17	struct list_head super_list;
18	const struct cred *cred;
19	struct inode *inode;
20	nfs4_stateid stateid;
21	fmode_t type;
22	unsigned long pagemod_limit;
23	__u64 change_attr;
24	unsigned long test_gen;
25	unsigned long flags;
26	refcount_t refcount;
27	spinlock_t lock;
28	struct rcu_head rcu;
29};
30
31enum {
32	NFS_DELEGATION_NEED_RECLAIM = 0,
33	NFS_DELEGATION_RETURN,
34	NFS_DELEGATION_RETURN_IF_CLOSED,
35	NFS_DELEGATION_REFERENCED,
36	NFS_DELEGATION_RETURNING,
37	NFS_DELEGATION_REVOKED,
38	NFS_DELEGATION_TEST_EXPIRED,
39	NFS_DELEGATION_INODE_FREEING,
40	NFS_DELEGATION_RETURN_DELAYED,
 
41};
42
43int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred,
44		fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit);
 
45void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred,
46		fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit);
 
47int nfs4_inode_return_delegation(struct inode *inode);
48void nfs4_inode_return_delegation_on_close(struct inode *inode);
 
49int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
50void nfs_inode_evict_delegation(struct inode *inode);
51
52struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
53void nfs_server_return_all_delegations(struct nfs_server *);
54void nfs_expire_all_delegations(struct nfs_client *clp);
55void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags);
56void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
57int nfs_client_return_marked_delegations(struct nfs_client *clp);
58int nfs_delegations_present(struct nfs_client *clp);
59void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid);
60void nfs_delegation_mark_returned(struct inode *inode, const nfs4_stateid *stateid);
61
62void nfs_delegation_mark_reclaim(struct nfs_client *clp);
63void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
64
65void nfs_mark_test_expired_all_delegations(struct nfs_client *clp);
66void nfs_test_expired_all_delegations(struct nfs_client *clp);
67void nfs_reap_expired_delegations(struct nfs_client *clp);
68
69/* NFSv4 delegation-related procedures */
70int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync);
 
 
71int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
72int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid);
73bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, const struct cred **cred);
74bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
75
76struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode);
77void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
78int nfs4_have_delegation(struct inode *inode, fmode_t flags);
79int nfs4_check_delegation(struct inode *inode, fmode_t flags);
80bool nfs4_delegation_flush_on_close(const struct inode *inode);
81void nfs_inode_find_delegation_state_and_recover(struct inode *inode,
82		const nfs4_stateid *stateid);
83int nfs4_inode_make_writeable(struct inode *inode);
84
85#endif
86
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
87static inline int nfs_have_delegated_attributes(struct inode *inode)
88{
89	return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
 
 
 
 
 
 
 
 
 
 
 
 
90}
91
92#endif
v6.13.7
  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 */
 16struct nfs_delegation {
 17	struct list_head super_list;
 18	const struct cred *cred;
 19	struct inode *inode;
 20	nfs4_stateid stateid;
 21	fmode_t type;
 22	unsigned long pagemod_limit;
 23	__u64 change_attr;
 24	unsigned long test_gen;
 25	unsigned long flags;
 26	refcount_t refcount;
 27	spinlock_t lock;
 28	struct rcu_head rcu;
 29};
 30
 31enum {
 32	NFS_DELEGATION_NEED_RECLAIM = 0,
 33	NFS_DELEGATION_RETURN,
 34	NFS_DELEGATION_RETURN_IF_CLOSED,
 35	NFS_DELEGATION_REFERENCED,
 36	NFS_DELEGATION_RETURNING,
 37	NFS_DELEGATION_REVOKED,
 38	NFS_DELEGATION_TEST_EXPIRED,
 39	NFS_DELEGATION_INODE_FREEING,
 40	NFS_DELEGATION_RETURN_DELAYED,
 41	NFS_DELEGATION_DELEGTIME,
 42};
 43
 44int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred,
 45			     fmode_t type, const nfs4_stateid *stateid,
 46			     unsigned long pagemod_limit, u32 deleg_type);
 47void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred,
 48				  fmode_t type, const nfs4_stateid *stateid,
 49				  unsigned long pagemod_limit, u32 deleg_type);
 50int nfs4_inode_return_delegation(struct inode *inode);
 51void nfs4_inode_return_delegation_on_close(struct inode *inode);
 52void nfs4_inode_set_return_delegation_on_close(struct inode *inode);
 53int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
 54void nfs_inode_evict_delegation(struct inode *inode);
 55
 56struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
 57void nfs_server_return_all_delegations(struct nfs_server *);
 58void nfs_expire_all_delegations(struct nfs_client *clp);
 59void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags);
 60void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
 61int nfs_client_return_marked_delegations(struct nfs_client *clp);
 62int nfs_delegations_present(struct nfs_client *clp);
 63void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid);
 64void nfs_delegation_mark_returned(struct inode *inode, const nfs4_stateid *stateid);
 65
 66void nfs_delegation_mark_reclaim(struct nfs_client *clp);
 67void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
 68
 69void nfs_mark_test_expired_all_delegations(struct nfs_client *clp);
 70void nfs_test_expired_all_delegations(struct nfs_client *clp);
 71void nfs_reap_expired_delegations(struct nfs_client *clp);
 72
 73/* NFSv4 delegation-related procedures */
 74int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred,
 75			  const nfs4_stateid *stateid,
 76			  struct nfs_delegation *delegation, int issync);
 77int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
 78int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid);
 79bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, const struct cred **cred);
 80bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
 81
 82struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode);
 83void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
 84int nfs4_have_delegation(struct inode *inode, fmode_t type, int flags);
 85int nfs4_check_delegation(struct inode *inode, fmode_t type);
 86bool nfs4_delegation_flush_on_close(const struct inode *inode);
 87void nfs_inode_find_delegation_state_and_recover(struct inode *inode,
 88		const nfs4_stateid *stateid);
 89int nfs4_inode_make_writeable(struct inode *inode);
 90
 91#endif
 92
 93#define NFS_DELEGATION_FLAG_TIME	BIT(1)
 94
 95void nfs_update_delegated_atime(struct inode *inode);
 96void nfs_update_delegated_mtime(struct inode *inode);
 97void nfs_update_delegated_mtime_locked(struct inode *inode);
 98
 99static inline int nfs_have_read_or_write_delegation(struct inode *inode)
100{
101	return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ, 0);
102}
103
104static inline int nfs_have_write_delegation(struct inode *inode)
105{
106	return NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE, 0);
107}
108
109static inline int nfs_have_delegated_attributes(struct inode *inode)
110{
111	return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ, 0);
112}
113
114static inline int nfs_have_delegated_atime(struct inode *inode)
115{
116	return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ,
117						 NFS_DELEGATION_FLAG_TIME);
118}
119
120static inline int nfs_have_delegated_mtime(struct inode *inode)
121{
122	return NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE,
123						 NFS_DELEGATION_FLAG_TIME);
124}
125
126#endif