/* 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 */