88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/* 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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