[mirror_ubuntu-jammy-kernel.git] / drivers / android / binder_internal.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _LINUX_BINDER_INTERNAL_H
#define _LINUX_BINDER_INTERNAL_H

#include <linux/export.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/refcount.h>
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/uidgid.h>

struct binder_context {
	struct binder_node *binder_context_mgr_node;
	struct mutex context_mgr_node_lock;
	kuid_t binder_context_mgr_uid;
	const char *name;
};

/**
 * struct binder_device - information about a binder device node
 * @hlist:          list of binder devices (only used for devices requested via
 *                  CONFIG_ANDROID_BINDER_DEVICES)
 * @miscdev:        information about a binder character device node
 * @context:        binder context information
 * @binderfs_inode: This is the inode of the root dentry of the super block
 *                  belonging to a binderfs mount.
 */
struct binder_device {
	struct hlist_node hlist;
	struct miscdevice miscdev;
	struct binder_context context;
	struct inode *binderfs_inode;
	refcount_t ref;
};

/**
 * binderfs_mount_opts - mount options for binderfs
 * @max: maximum number of allocatable binderfs binder devices
 * @stats_mode: enable binder stats in binderfs.
 */
struct binderfs_mount_opts {
	int max;
	int stats_mode;
};

/**
 * binderfs_info - information about a binderfs mount
 * @ipc_ns:         The ipc namespace the binderfs mount belongs to.
 * @control_dentry: This records the dentry of this binderfs mount
 *                  binder-control device.
 * @root_uid:       uid that needs to be used when a new binder device is
 *                  created.
 * @root_gid:       gid that needs to be used when a new binder device is
 *                  created.
 * @mount_opts:     The mount options in use.
 * @device_count:   The current number of allocated binder devices.
 * @proc_log_dir:   Pointer to the directory dentry containing process-specific
 *                  logs.
 */
struct binderfs_info {
	struct ipc_namespace *ipc_ns;
	struct dentry *control_dentry;
	kuid_t root_uid;
	kgid_t root_gid;
	struct binderfs_mount_opts mount_opts;
	int device_count;
	struct dentry *proc_log_dir;
};

extern const struct file_operations binder_fops;

extern char *binder_devices_param;

#ifdef CONFIG_ANDROID_BINDERFS
extern bool is_binderfs_device(const struct inode *inode);
extern struct dentry *binderfs_create_file(struct dentry *dir, const char *name,
					   const struct file_operations *fops,
					   void *data);
extern void binderfs_remove_file(struct dentry *dentry);
#else
static inline bool is_binderfs_device(const struct inode *inode)
{
	return false;
}
static inline struct dentry *binderfs_create_file(struct dentry *dir,
					   const char *name,
					   const struct file_operations *fops,
					   void *data)
{
	return NULL;
}
static inline void binderfs_remove_file(struct dentry *dentry) {}
#endif

#ifdef CONFIG_ANDROID_BINDERFS
extern int __init init_binderfs(void);
#else
static inline int __init init_binderfs(void)
{
	return 0;
}
#endif

int binder_stats_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_stats);

int binder_state_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_state);

int binder_transactions_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_transactions);

int binder_transaction_log_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_transaction_log);

struct binder_transaction_log_entry {
	int debug_id;
	int debug_id_done;
	int call_type;
	int from_proc;
	int from_thread;
	int target_handle;
	int to_proc;
	int to_thread;
	int to_node;
	int data_size;
	int offsets_size;
	int return_error_line;
	uint32_t return_error;
	uint32_t return_error_param;
	char context_name[BINDERFS_MAX_NAME + 1];
};

struct binder_transaction_log {
	atomic_t cur;
	bool full;
	struct binder_transaction_log_entry entry[32];
};

extern struct binder_transaction_log binder_transaction_log;
extern struct binder_transaction_log binder_transaction_log_failed;
#endif /* _LINUX_BINDER_INTERNAL_H */
Commit	Line	Data
3ad20fe3 CB	1	/* SPDX-License-Identifier: GPL-2.0 */
	2
	3	#ifndef _LINUX_BINDER_INTERNAL_H
	4	#define _LINUX_BINDER_INTERNAL_H
	5
	6	#include <linux/export.h>
	7	#include <linux/fs.h>
	8	#include <linux/list.h>
	9	#include <linux/miscdevice.h>
	10	#include <linux/mutex.h>
f0fe2c0f	11	#include <linux/refcount.h>
3ad20fe3 CB	12	#include <linux/stddef.h>
	13	#include <linux/types.h>
	14	#include <linux/uidgid.h>
	15
	16	struct binder_context {
	17	struct binder_node *binder_context_mgr_node;
	18	struct mutex context_mgr_node_lock;
	19	kuid_t binder_context_mgr_uid;
	20	const char *name;
	21	};
	22
	23	/**
	24	* struct binder_device - information about a binder device node
	25	* @hlist: list of binder devices (only used for devices requested via
	26	* CONFIG_ANDROID_BINDER_DEVICES)
	27	* @miscdev: information about a binder character device node
	28	* @context: binder context information
	29	* @binderfs_inode: This is the inode of the root dentry of the super block
	30	* belonging to a binderfs mount.
	31	*/
	32	struct binder_device {
	33	struct hlist_node hlist;
	34	struct miscdevice miscdev;
	35	struct binder_context context;
	36	struct inode *binderfs_inode;
f0fe2c0f	37	refcount_t ref;
3ad20fe3 CB	38	};
3ad20fe3 CB	39
4feb80fa HV	40	/**
	41	* binderfs_mount_opts - mount options for binderfs
	42	* @max: maximum number of allocatable binderfs binder devices
	43	* @stats_mode: enable binder stats in binderfs.
	44	*/
	45	struct binderfs_mount_opts {
	46	int max;
	47	int stats_mode;
	48	};
	49
	50	/**
	51	* binderfs_info - information about a binderfs mount
	52	* @ipc_ns: The ipc namespace the binderfs mount belongs to.
	53	* @control_dentry: This records the dentry of this binderfs mount
	54	* binder-control device.
	55	* @root_uid: uid that needs to be used when a new binder device is
	56	* created.
	57	* @root_gid: gid that needs to be used when a new binder device is
	58	* created.
	59	* @mount_opts: The mount options in use.
	60	* @device_count: The current number of allocated binder devices.
	61	* @proc_log_dir: Pointer to the directory dentry containing process-specific
	62	* logs.
	63	*/
	64	struct binderfs_info {
	65	struct ipc_namespace *ipc_ns;
	66	struct dentry *control_dentry;
	67	kuid_t root_uid;
	68	kgid_t root_gid;
	69	struct binderfs_mount_opts mount_opts;
	70	int device_count;
	71	struct dentry *proc_log_dir;
	72	};
	73
3ad20fe3 CB	74	extern const struct file_operations binder_fops;
3ad20fe3 CB	75
ca2864c6 HV	76	extern char *binder_devices_param;
ca2864c6 HV	77
3ad20fe3 CB	78	#ifdef CONFIG_ANDROID_BINDERFS
3ad20fe3 CB	79	extern bool is_binderfs_device(const struct inode *inode);
4feb80fa HV	80	extern struct dentry binderfs_create_file(struct dentry dir, const char *name,
	81	const struct file_operations *fops,
	82	void *data);
	83	extern void binderfs_remove_file(struct dentry *dentry);
3ad20fe3 CB	84	#else
	85	static inline bool is_binderfs_device(const struct inode *inode)
	86	{
	87	return false;
	88	}
4feb80fa HV	89	static inline struct dentry binderfs_create_file(struct dentry dir,
	90	const char *name,
	91	const struct file_operations *fops,
	92	void *data)
	93	{
	94	return NULL;
	95	}
	96	static inline void binderfs_remove_file(struct dentry *dentry) {}
3ad20fe3 CB	97	#endif
3ad20fe3 CB	98
5b9633af CB	99	#ifdef CONFIG_ANDROID_BINDERFS
	100	extern int __init init_binderfs(void);
	101	#else
	102	static inline int __init init_binderfs(void)
	103	{
	104	return 0;
	105	}
	106	#endif
	107
0e13e452 HV	108	int binder_stats_show(struct seq_file m, void unused);
	109	DEFINE_SHOW_ATTRIBUTE(binder_stats);
	110
	111	int binder_state_show(struct seq_file m, void unused);
	112	DEFINE_SHOW_ATTRIBUTE(binder_state);
	113
	114	int binder_transactions_show(struct seq_file m, void unused);
	115	DEFINE_SHOW_ATTRIBUTE(binder_transactions);
03e2e07e HV	116
	117	int binder_transaction_log_show(struct seq_file m, void unused);
	118	DEFINE_SHOW_ATTRIBUTE(binder_transaction_log);
	119
	120	struct binder_transaction_log_entry {
	121	int debug_id;
	122	int debug_id_done;
	123	int call_type;
	124	int from_proc;
	125	int from_thread;
	126	int target_handle;
	127	int to_proc;
	128	int to_thread;
	129	int to_node;
	130	int data_size;
	131	int offsets_size;
	132	int return_error_line;
	133	uint32_t return_error;
	134	uint32_t return_error_param;
51d8a7ec	135	char context_name[BINDERFS_MAX_NAME + 1];
03e2e07e HV	136	};
	137
	138	struct binder_transaction_log {
	139	atomic_t cur;
	140	bool full;
	141	struct binder_transaction_log_entry entry[32];
	142	};
	143
	144	extern struct binder_transaction_log binder_transaction_log;
	145	extern struct binder_transaction_log binder_transaction_log_failed;
3ad20fe3	146	#endif /* _LINUX_BINDER_INTERNAL_H */