xref: /OK3568_Linux_fs/kernel/include/linux/fs_pin.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #include <linux/wait.h>
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun struct fs_pin {
5*4882a593Smuzhiyun 	wait_queue_head_t	wait;
6*4882a593Smuzhiyun 	int			done;
7*4882a593Smuzhiyun 	struct hlist_node	s_list;
8*4882a593Smuzhiyun 	struct hlist_node	m_list;
9*4882a593Smuzhiyun 	void (*kill)(struct fs_pin *);
10*4882a593Smuzhiyun };
11*4882a593Smuzhiyun 
12*4882a593Smuzhiyun struct vfsmount;
13*4882a593Smuzhiyun 
init_fs_pin(struct fs_pin * p,void (* kill)(struct fs_pin *))14*4882a593Smuzhiyun static inline void init_fs_pin(struct fs_pin *p, void (*kill)(struct fs_pin *))
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun 	init_waitqueue_head(&p->wait);
17*4882a593Smuzhiyun 	INIT_HLIST_NODE(&p->s_list);
18*4882a593Smuzhiyun 	INIT_HLIST_NODE(&p->m_list);
19*4882a593Smuzhiyun 	p->kill = kill;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun 
22*4882a593Smuzhiyun void pin_remove(struct fs_pin *);
23*4882a593Smuzhiyun void pin_insert(struct fs_pin *, struct vfsmount *);
24*4882a593Smuzhiyun void pin_kill(struct fs_pin *);
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