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/* SPDX-License-Identifier: GPL-2.0 */
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/* rust_binder_internal.h
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 *
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 * This file contains internal data structures used by Rust Binder. Mostly,
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 * these are type definitions used only by binderfs or things that Rust Binder
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 * define and export to binderfs.
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 *
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 * It does not include things exported by binderfs to Rust Binder since this
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 * file is not included as input to bindgen.
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 *
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 * Copyright (C) 2025 Google LLC.
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 */
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#ifndef _LINUX_RUST_BINDER_INTERNAL_H
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#define _LINUX_RUST_BINDER_INTERNAL_H
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#define RUST_BINDERFS_SUPER_MAGIC	0x6c6f6f71
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#include <linux/seq_file.h>
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#include <uapi/linux/android/binder.h>
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#include <uapi/linux/android/binderfs.h>
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/*
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 * The internal data types in the Rust Binder driver are opaque to C, so we use
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 * void pointer typedefs for these types.
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 */
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typedef void *rust_binder_context;
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/**
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 * struct binder_device - information about a binder device node
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 * @minor:     the minor number used by this device
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 * @ctx:       the Rust Context used by this device, or null for binder-control
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 *
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 * This is used as the private data for files directly in binderfs, but not
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 * files in the binder_logs subdirectory. This struct owns a refcount on `ctx`
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 * and the entry for `minor` in `binderfs_minors`. For binder-control `ctx` is
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 * null.
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 */
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struct binder_device {
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	int minor;
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	rust_binder_context ctx;
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};
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int rust_binder_stats_show(struct seq_file *m, void *unused);
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int rust_binder_state_show(struct seq_file *m, void *unused);
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int rust_binder_transactions_show(struct seq_file *m, void *unused);
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int rust_binder_proc_show(struct seq_file *m, void *pid);
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extern const struct file_operations rust_binder_fops;
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rust_binder_context rust_binder_new_context(char *name);
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void rust_binder_remove_context(rust_binder_context device);
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/**
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 * binderfs_mount_opts - mount options for binderfs
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 * @max: maximum number of allocatable binderfs binder devices
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 * @stats_mode: enable binder stats in binderfs.
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 */
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struct binderfs_mount_opts {
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	int max;
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	int stats_mode;
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};
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/**
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 * binderfs_info - information about a binderfs mount
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 * @ipc_ns:         The ipc namespace the binderfs mount belongs to.
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 * @control_dentry: This records the dentry of this binderfs mount
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 *                  binder-control device.
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 * @root_uid:       uid that needs to be used when a new binder device is
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 *                  created.
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 * @root_gid:       gid that needs to be used when a new binder device is
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 *                  created.
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 * @mount_opts:     The mount options in use.
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 * @device_count:   The current number of allocated binder devices.
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 * @proc_log_dir:   Pointer to the directory dentry containing process-specific
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 *                  logs.
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 */
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struct binderfs_info {
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	struct ipc_namespace *ipc_ns;
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	struct dentry *control_dentry;
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	kuid_t root_uid;
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	kgid_t root_gid;
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	struct binderfs_mount_opts mount_opts;
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	int device_count;
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	struct dentry *proc_log_dir;
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};
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#endif /* _LINUX_RUST_BINDER_INTERNAL_H */
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