include/linux/proc_fs.h

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

File Facts

System
Linux kernel
Corpus path
include/linux/proc_fs.h
Extension
.h
Size
9616 bytes
Lines
265
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 proc_ops {
	unsigned int proc_flags;
	int	(*proc_open)(struct inode *, struct file *);
	ssize_t	(*proc_read)(struct file *, char __user *, size_t, loff_t *);
	ssize_t (*proc_read_iter)(struct kiocb *, struct iov_iter *);
	ssize_t	(*proc_write)(struct file *, const char __user *, size_t, loff_t *);
	/* mandatory unless nonseekable_open() or equivalent is used */
	loff_t	(*proc_lseek)(struct file *, loff_t, int);
	int	(*proc_release)(struct inode *, struct file *);
	__poll_t (*proc_poll)(struct file *, struct poll_table_struct *);
	long	(*proc_ioctl)(struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
	long	(*proc_compat_ioctl)(struct file *, unsigned int, unsigned long);
#endif
	int	(*proc_mmap)(struct file *, struct vm_area_struct *);
	unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
} __randomize_layout;

/* definitions for hide_pid field */
enum proc_hidepid {
	HIDEPID_OFF	  = 0,
	HIDEPID_NO_ACCESS = 1,
	HIDEPID_INVISIBLE = 2,
	HIDEPID_NOT_PTRACEABLE = 4, /* Limit pids to only ptraceable pids */
};

/* definitions for proc mount option pidonly */
enum proc_pidonly {
	PROC_PIDONLY_OFF = 0,
	PROC_PIDONLY_ON  = 1,
};

struct proc_fs_info {
	struct pid_namespace *pid_ns;
	kgid_t pid_gid;
	const struct cred *mounter_cred;
	enum proc_hidepid hide_pid;
	enum proc_pidonly pidonly;
	struct rcu_head rcu;
};

static inline struct proc_fs_info *proc_sb_info(struct super_block *sb)
{
	return sb->s_fs_info;
}

#ifdef CONFIG_PROC_FS

typedef int (*proc_write_t)(struct file *, char *, size_t);

extern void proc_root_init(void);
extern void proc_flush_pid(struct pid *);

extern struct proc_dir_entry *proc_symlink(const char *,
		struct proc_dir_entry *, const char *);
struct proc_dir_entry *_proc_mkdir(const char *, umode_t, struct proc_dir_entry *, void *, bool);
extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *);
extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t,
					      struct proc_dir_entry *, void *);
extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t,
					      struct proc_dir_entry *);
struct proc_dir_entry *proc_create_mount_point(const char *name);

struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode,
		struct proc_dir_entry *parent, const struct seq_operations *ops,
		unsigned int state_size, void *data);
#define proc_create_seq_data(name, mode, parent, ops, data) \
	proc_create_seq_private(name, mode, parent, ops, 0, data)
#define proc_create_seq(name, mode, parent, ops) \
	proc_create_seq_private(name, mode, parent, ops, 0, NULL)
struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode,
		struct proc_dir_entry *parent,
		int (*show)(struct seq_file *, void *), void *data);
#define proc_create_single(name, mode, parent, show) \
	proc_create_single_data(name, mode, parent, show, NULL)
 
extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
					       struct proc_dir_entry *,
					       const struct proc_ops *,
					       void *);

struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops);
extern void proc_set_size(struct proc_dir_entry *, loff_t);
extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);

/*
 * Obtain the private data passed by user through proc_create_data() or
 * related.
 */
static inline void *pde_data(const struct inode *inode)

Annotation

Implementation Notes