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