include/linux/fs_struct.h

Source file repositories/reference/linux-study-clean/include/linux/fs_struct.h

File Facts

System
Linux kernel
Corpus path
include/linux/fs_struct.h
Extension
.h
Size
1162 bytes
Lines
51
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fs_struct {
	int users;
	seqlock_t seq;
	int umask;
	int in_exec;
	struct path root, pwd;
} __randomize_layout;

extern struct kmem_cache *fs_cachep;

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

static inline void get_fs_root(struct fs_struct *fs, struct path *root)
{
	read_seqlock_excl(&fs->seq);
	*root = fs->root;
	path_get(root);
	read_sequnlock_excl(&fs->seq);
}

static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
{
	read_seqlock_excl(&fs->seq);
	*pwd = fs->pwd;
	path_get(pwd);
	read_sequnlock_excl(&fs->seq);
}

extern bool current_chrooted(void);

static inline int current_umask(void)
{
	return current->fs->umask;
}

#endif /* _LINUX_FS_STRUCT_H */

Annotation

Implementation Notes