mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 09:41:44 +00:00
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
|
|
* 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 defined(CONFIG_NFS_V4)
|
|
/*
|
|
* NFSv4 delegation
|
|
*/
|
|
struct nfs_delegation {
|
|
struct list_head super_list;
|
|
struct rpc_cred *cred;
|
|
struct inode *inode;
|
|
nfs4_stateid stateid;
|
|
int type;
|
|
#define NFS_DELEGATION_NEED_RECLAIM 1
|
|
long flags;
|
|
loff_t maxsize;
|
|
__u64 change_attr;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
|
|
void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
|
|
int nfs_inode_return_delegation(struct inode *inode);
|
|
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
|
|
|
|
struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
|
|
void nfs_return_all_delegations(struct super_block *sb);
|
|
void nfs_expire_all_delegations(struct nfs_client *clp);
|
|
void nfs_handle_cb_pathdown(struct nfs_client *clp);
|
|
|
|
void nfs_delegation_mark_reclaim(struct nfs_client *clp);
|
|
void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
|
|
|
|
/* NFSv4 delegation-related procedures */
|
|
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid);
|
|
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
|
|
int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
|
|
int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
|
|
|
|
static inline int nfs_have_delegation(struct inode *inode, int flags)
|
|
{
|
|
struct nfs_delegation *delegation;
|
|
int ret = 0;
|
|
|
|
flags &= FMODE_READ|FMODE_WRITE;
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(inode)->delegation);
|
|
if (delegation != NULL && (delegation->type & flags) == flags)
|
|
ret = 1;
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
|
|
#else
|
|
static inline int nfs_have_delegation(struct inode *inode, int flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int nfs_inode_return_delegation(struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif
|