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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /fs/nfs/delegation.h | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/nfs/delegation.h')
-rw-r--r-- | fs/nfs/delegation.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h new file mode 100644 index 000000000..26f57a99d --- /dev/null +++ b/fs/nfs/delegation.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * linux/fs/nfs/delegation.h + * + * Copyright (c) Trond Myklebust + * + * Definitions pertaining to NFS delegated files + */ +#ifndef FS_NFS_DELEGATION_H +#define FS_NFS_DELEGATION_H + +#if IS_ENABLED(CONFIG_NFS_V4) +/* + * NFSv4 delegation + */ +struct nfs_delegation { + struct list_head super_list; + const struct cred *cred; + struct inode *inode; + nfs4_stateid stateid; + fmode_t type; + unsigned long pagemod_limit; + __u64 change_attr; + unsigned long flags; + refcount_t refcount; + spinlock_t lock; + struct rcu_head rcu; +}; + +enum { + NFS_DELEGATION_NEED_RECLAIM = 0, + NFS_DELEGATION_RETURN, + NFS_DELEGATION_RETURN_IF_CLOSED, + NFS_DELEGATION_REFERENCED, + NFS_DELEGATION_RETURNING, + NFS_DELEGATION_REVOKED, + NFS_DELEGATION_TEST_EXPIRED, + NFS_DELEGATION_INODE_FREEING, + NFS_DELEGATION_RETURN_DELAYED, +}; + +int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred, + fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); +void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred, + fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); +int nfs4_inode_return_delegation(struct inode *inode); +void nfs4_inode_return_delegation_on_close(struct inode *inode); +int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); +void nfs_inode_evict_delegation(struct inode *inode); + +struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); +void nfs_server_return_all_delegations(struct nfs_server *); +void nfs_expire_all_delegations(struct nfs_client *clp); +void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); +void nfs_expire_unreferenced_delegations(struct nfs_client *clp); +int nfs_client_return_marked_delegations(struct nfs_client *clp); +int nfs_delegations_present(struct nfs_client *clp); +void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid); +void nfs_delegation_mark_returned(struct inode *inode, const nfs4_stateid *stateid); + +void nfs_delegation_mark_reclaim(struct nfs_client *clp); +void nfs_delegation_reap_unclaimed(struct nfs_client *clp); + +void nfs_mark_test_expired_all_delegations(struct nfs_client *clp); +void nfs_test_expired_all_delegations(struct nfs_client *clp); +void nfs_reap_expired_delegations(struct nfs_client *clp); + +/* NFSv4 delegation-related procedures */ +int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync); +int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); +int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); +bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, const struct cred **cred); +bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode); + +struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode); +void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); +int nfs4_have_delegation(struct inode *inode, fmode_t flags); +int nfs4_check_delegation(struct inode *inode, fmode_t flags); +bool nfs4_delegation_flush_on_close(const struct inode *inode); +void nfs_inode_find_delegation_state_and_recover(struct inode *inode, + const nfs4_stateid *stateid); +int nfs4_inode_make_writeable(struct inode *inode); + +#endif + +static inline int nfs_have_delegated_attributes(struct inode *inode) +{ + return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) && + !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); +} + +#endif |