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