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/* SPDX-License-Identifier: GPL-2.0 */
/* rust_binder_internal.h
*
* This file contains internal data structures used by Rust Binder. Mostly,
* these are type definitions used only by binderfs or things that Rust Binder
* define and export to binderfs.
*
* It does not include things exported by binderfs to Rust Binder since this
* file is not included as input to bindgen.
*
* Copyright (C) 2025 Google LLC.
*/
#ifndef _LINUX_RUST_BINDER_INTERNAL_H
#define _LINUX_RUST_BINDER_INTERNAL_H
#define RUST_BINDERFS_SUPER_MAGIC 0x6c6f6f71
#include <linux/seq_file.h>
#include <uapi/linux/android/binder.h>
#include <uapi/linux/android/binderfs.h>
/*
* The internal data types in the Rust Binder driver are opaque to C, so we use
* void pointer typedefs for these types.
*/
typedef void *rust_binder_context;
/**
* struct binder_device - information about a binder device node
* @minor: the minor number used by this device
* @ctx: the Rust Context used by this device, or null for binder-control
*
* This is used as the private data for files directly in binderfs, but not
* files in the binder_logs subdirectory. This struct owns a refcount on `ctx`
* and the entry for `minor` in `binderfs_minors`. For binder-control `ctx` is
* null.
*/
struct binder_device {
int minor;
rust_binder_context ctx;
};
int rust_binder_stats_show(struct seq_file *m, void *unused);
int rust_binder_state_show(struct seq_file *m, void *unused);
int rust_binder_transactions_show(struct seq_file *m, void *unused);
int rust_binder_proc_show(struct seq_file *m, void *pid);
extern const struct file_operations rust_binder_fops;
rust_binder_context rust_binder_new_context(char *name);
void rust_binder_remove_context(rust_binder_context device);
/**
* 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;
};
#endif /* _LINUX_RUST_BINDER_INTERNAL_H */
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