[mirror_ubuntu-zesty-kernel.git] / include / linux / fs_struct.h

#ifndef _LINUX_FS_STRUCT_H
#define _LINUX_FS_STRUCT_H

#include <linux/path.h>
#include <linux/spinlock.h>
#include <linux/seqlock.h>

struct fs_struct {
	int users;
	spinlock_t lock;
	seqcount_t seq;
	int umask;
	int in_exec;
	struct path root, pwd;
};

extern struct kmem_cache *fs_cachep;

extern void exit_fs(struct task_struct *);
extern void set_fs_root(struct fs_struct *, struct path *);
extern void set_fs_pwd(struct fs_struct *, struct path *);
extern struct fs_struct *copy_fs_struct(struct fs_struct *);
extern void free_fs_struct(struct fs_struct *);
extern void daemonize_fs_struct(void);
extern int unshare_fs_struct(void);

static inline void get_fs_root(struct fs_struct *fs, struct path *root)
{
	spin_lock(&fs->lock);
	*root = fs->root;
	path_get(root);
	spin_unlock(&fs->lock);
}

static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
{
	spin_lock(&fs->lock);
	*pwd = fs->pwd;
	path_get(pwd);
	spin_unlock(&fs->lock);
}

static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root,
				       struct path *pwd)
{
	spin_lock(&fs->lock);
	*root = fs->root;
	path_get(root);
	*pwd = fs->pwd;
	path_get(pwd);
	spin_unlock(&fs->lock);
}

#endif /* _LINUX_FS_STRUCT_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_FS_STRUCT_H
	2	#define _LINUX_FS_STRUCT_H
	3
6ac08c39	4	#include <linux/path.h>
c28cc364 NP	5	#include <linux/spinlock.h>
c28cc364 NP	6	#include <linux/seqlock.h>
1da177e4 LT	7
1da177e4 LT	8	struct fs_struct {
498052bb	9	int users;
2a4419b5	10	spinlock_t lock;
c28cc364	11	seqcount_t seq;
1da177e4	12	int umask;
498052bb	13	int in_exec;
7f2da1e7	14	struct path root, pwd;
1da177e4 LT	15	};
1da177e4 LT	16
aa362a83 CL	17	extern struct kmem_cache *fs_cachep;
aa362a83 CL	18
1da177e4	19	extern void exit_fs(struct task_struct *);
ac748a09 JB	20	extern void set_fs_root(struct fs_struct , struct path );
ac748a09 JB	21	extern void set_fs_pwd(struct fs_struct , struct path );
1da177e4	22	extern struct fs_struct copy_fs_struct(struct fs_struct );
498052bb	23	extern void free_fs_struct(struct fs_struct *);
3e93cd67 AV	24	extern void daemonize_fs_struct(void);
3e93cd67 AV	25	extern int unshare_fs_struct(void);
1da177e4	26
f7ad3c6b MS	27	static inline void get_fs_root(struct fs_struct fs, struct path root)
f7ad3c6b MS	28	{
2a4419b5	29	spin_lock(&fs->lock);
f7ad3c6b MS	30	*root = fs->root;
f7ad3c6b MS	31	path_get(root);
2a4419b5	32	spin_unlock(&fs->lock);
f7ad3c6b MS	33	}
	34
	35	static inline void get_fs_pwd(struct fs_struct fs, struct path pwd)
	36	{
2a4419b5	37	spin_lock(&fs->lock);
f7ad3c6b MS	38	*pwd = fs->pwd;
f7ad3c6b MS	39	path_get(pwd);
2a4419b5	40	spin_unlock(&fs->lock);
f7ad3c6b MS	41	}
	42
	43	static inline void get_fs_root_and_pwd(struct fs_struct fs, struct path root,
	44	struct path *pwd)
	45	{
2a4419b5	46	spin_lock(&fs->lock);
f7ad3c6b MS	47	*root = fs->root;
	48	path_get(root);
	49	*pwd = fs->pwd;
	50	path_get(pwd);
2a4419b5	51	spin_unlock(&fs->lock);
f7ad3c6b MS	52	}
f7ad3c6b MS	53
1da177e4	54	#endif /* _LINUX_FS_STRUCT_H */