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>
 11#include <linux/refcount.h>
 12#include <linux/stddef.h>
 13#include <linux/types.h>
 14#include <linux/uidgid.h>
 15
 16struct 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 */
 32struct binder_device {
 33	struct hlist_node hlist;
 34	struct miscdevice miscdev;
 35	struct binder_context context;
 36	struct inode *binderfs_inode;
 37	refcount_t ref;
 38};
 39
 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 */
 45struct 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 */
 64struct 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
 74extern const struct file_operations binder_fops;
 75
 76extern char *binder_devices_param;
 77
 78#ifdef CONFIG_ANDROID_BINDERFS
 79extern bool is_binderfs_device(const struct inode *inode);
 80extern struct dentry *binderfs_create_file(struct dentry *dir, const char *name,
 81					   const struct file_operations *fops,
 82					   void *data);
 83extern void binderfs_remove_file(struct dentry *dentry);
 84#else
 85static inline bool is_binderfs_device(const struct inode *inode)
 86{
 87	return false;
 88}
 89static 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}
 96static inline void binderfs_remove_file(struct dentry *dentry) {}
 97#endif
 98
 99#ifdef CONFIG_ANDROID_BINDERFS
100extern int __init init_binderfs(void);
101#else
102static inline int __init init_binderfs(void)
103{
104	return 0;
105}
106#endif
107
108int binder_stats_show(struct seq_file *m, void *unused);
109DEFINE_SHOW_ATTRIBUTE(binder_stats);
110
111int binder_state_show(struct seq_file *m, void *unused);
112DEFINE_SHOW_ATTRIBUTE(binder_state);
113
114int binder_transactions_show(struct seq_file *m, void *unused);
115DEFINE_SHOW_ATTRIBUTE(binder_transactions);
116
117int binder_transaction_log_show(struct seq_file *m, void *unused);
118DEFINE_SHOW_ATTRIBUTE(binder_transaction_log);
119
120struct 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;
135	char context_name[BINDERFS_MAX_NAME + 1];
136};
137
138struct binder_transaction_log {
139	atomic_t cur;
140	bool full;
141	struct binder_transaction_log_entry entry[32];
142};
143
144extern struct binder_transaction_log binder_transaction_log;
145extern struct binder_transaction_log binder_transaction_log_failed;
146#endif /* _LINUX_BINDER_INTERNAL_H */