Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | ||
89d77c8f | 12 | #if IS_ENABLED(CONFIG_NFS_V4) |
1da177e4 LT |
13 | /* |
14 | * NFSv4 delegation | |
15 | */ | |
16 | struct nfs_delegation { | |
17 | struct list_head super_list; | |
a52458b4 | 18 | const struct cred *cred; |
1da177e4 LT |
19 | struct inode *inode; |
20 | nfs4_stateid stateid; | |
bd7bf9d5 | 21 | fmode_t type; |
7d160a6c | 22 | unsigned long pagemod_limit; |
beb2a5ec | 23 | __u64 change_attr; |
15c831bf | 24 | unsigned long flags; |
34310430 | 25 | spinlock_t lock; |
8383e460 | 26 | struct rcu_head rcu; |
1da177e4 LT |
27 | }; |
28 | ||
515d8611 TM |
29 | enum { |
30 | NFS_DELEGATION_NEED_RECLAIM = 0, | |
31 | NFS_DELEGATION_RETURN, | |
b757144f | 32 | NFS_DELEGATION_RETURN_IF_CLOSED, |
b7391f44 | 33 | NFS_DELEGATION_REFERENCED, |
d25be546 | 34 | NFS_DELEGATION_RETURNING, |
869f9dfa | 35 | NFS_DELEGATION_REVOKED, |
45870d69 | 36 | NFS_DELEGATION_TEST_EXPIRED, |
515d8611 TM |
37 | }; |
38 | ||
a52458b4 | 39 | int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred, |
35156bff | 40 | fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); |
a52458b4 | 41 | void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred, |
35156bff | 42 | fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); |
57ec14c5 | 43 | int nfs4_inode_return_delegation(struct inode *inode); |
e047a10c | 44 | int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); |
e6f81075 | 45 | void nfs_inode_return_delegation_noreclaim(struct inode *inode); |
1da177e4 | 46 | |
adfa6f98 | 47 | struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); |
eeebf916 | 48 | void nfs_server_return_all_delegations(struct nfs_server *); |
adfa6f98 | 49 | void nfs_expire_all_delegations(struct nfs_client *clp); |
826e0013 | 50 | void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); |
b7391f44 | 51 | void nfs_expire_unreferenced_delegations(struct nfs_client *clp); |
d18cc1fd | 52 | int nfs_client_return_marked_delegations(struct nfs_client *clp); |
d3978bb3 | 53 | int nfs_delegations_present(struct nfs_client *clp); |
41020b67 | 54 | void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid); |
1da177e4 | 55 | |
adfa6f98 DH |
56 | void nfs_delegation_mark_reclaim(struct nfs_client *clp); |
57 | void nfs_delegation_reap_unclaimed(struct nfs_client *clp); | |
1da177e4 | 58 | |
45870d69 TM |
59 | void nfs_mark_test_expired_all_delegations(struct nfs_client *clp); |
60 | void nfs_reap_expired_delegations(struct nfs_client *clp); | |
61 | ||
1da177e4 | 62 | /* NFSv4 delegation-related procedures */ |
a52458b4 | 63 | int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync); |
24311f88 | 64 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid, fmode_t type); |
db4f2e63 | 65 | int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); |
a52458b4 | 66 | bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, const struct cred **cred); |
12f275cd | 67 | bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode); |
1da177e4 | 68 | |
b7391f44 | 69 | void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); |
011e2a7f | 70 | int nfs4_have_delegation(struct inode *inode, fmode_t flags); |
15bb3afe | 71 | int nfs4_check_delegation(struct inode *inode, fmode_t flags); |
5445b1fb | 72 | bool nfs4_delegation_flush_on_close(const struct inode *inode); |
6c2d8f8d TM |
73 | void nfs_inode_find_delegation_state_and_recover(struct inode *inode, |
74 | const nfs4_stateid *stateid); | |
c01d3645 | 75 | int nfs4_inode_make_writeable(struct inode *inode); |
cae7a073 | 76 | |
1da177e4 LT |
77 | #endif |
78 | ||
b4d2314b TM |
79 | static inline int nfs_have_delegated_attributes(struct inode *inode) |
80 | { | |
011e2a7f | 81 | return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) && |
b4d2314b TM |
82 | !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); |
83 | } | |
84 | ||
1da177e4 | 85 | #endif |