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| 2 | |
| 3 | *
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| 4 | * This file contains internal data structures used by Rust Binder. Mostly,
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| 5 | * these are type definitions used only by binderfs or things that Rust Binder
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| 6 | * define and export to binderfs.
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| 7 | *
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| 8 | * It does not include things exported by binderfs to Rust Binder since this
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| 9 | * file is not included as input to bindgen.
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| 10 | *
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| 11 | * Copyright (C) 2025 Google LLC.
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| 12 |
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| 13 |
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| 14 | #ifndef _LINUX_RUST_BINDER_INTERNAL_H
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| 15 | #define _LINUX_RUST_BINDER_INTERNAL_H
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| 16 |
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| 17 | #define RUST_BINDERFS_SUPER_MAGIC 0x6c6f6f71
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| 18 |
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| 19 | #include <linux/seq_file.h>
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| 20 | #include <uapi/linux/android/binder.h>
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| 21 | #include <uapi/linux/android/binderfs.h>
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| 22 |
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| 23 | |
| 24 | * The internal data types in the Rust Binder driver are opaque to C, so we use
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| 25 | * void pointer typedefs for these types.
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| 26 |
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| 27 | typedef void *rust_binder_context;
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| 28 |
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| 29 | |
| 30 | * struct binder_device - information about a binder device node
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| 31 | * @minor: the minor number used by this device
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| 32 | * @ctx: the Rust Context used by this device, or null for binder-control
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| 33 | *
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| 34 | * This is used as the private data for files directly in binderfs, but not
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| 35 | * files in the binder_logs subdirectory. This struct owns a refcount on `ctx`
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| 36 | * and the entry for `minor` in `binderfs_minors`. For binder-control `ctx` is
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| 37 | * null.
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| 38 |
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| 39 | struct binder_device {
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| 40 | int minor;
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| 41 | rust_binder_context ctx;
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| 42 | };
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| 43 |
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| 44 | int rust_binder_stats_show(struct seq_file *m, void *unused);
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| 45 | int rust_binder_state_show(struct seq_file *m, void *unused);
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| 46 | int rust_binder_transactions_show(struct seq_file *m, void *unused);
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| 47 | int rust_binder_proc_show(struct seq_file *m, void *pid);
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| 48 |
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| 49 | extern const struct file_operations rust_binder_fops;
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| 50 | rust_binder_context rust_binder_new_context(char *name);
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| 51 | void rust_binder_remove_context(rust_binder_context device);
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| 52 |
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| 53 | |
| 54 | * binderfs_mount_opts - mount options for binderfs
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| 55 | * @max: maximum number of allocatable binderfs binder devices
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| 56 | * @stats_mode: enable binder stats in binderfs.
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| 57 |
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| 58 | struct binderfs_mount_opts {
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| 59 | int max;
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| 60 | int stats_mode;
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| 61 | };
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| 62 |
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| 63 | |
| 64 | * binderfs_info - information about a binderfs mount
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| 65 | * @ipc_ns: The ipc namespace the binderfs mount belongs to.
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| 66 | * @control_dentry: This records the dentry of this binderfs mount
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| 67 | * binder-control device.
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| 68 | * @root_uid: uid that needs to be used when a new binder device is
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| 69 | * created.
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| 70 | * @root_gid: gid that needs to be used when a new binder device is
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| 71 | * created.
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| 72 | * @mount_opts: The mount options in use.
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| 73 | * @device_count: The current number of allocated binder devices.
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| 74 | * @proc_log_dir: Pointer to the directory dentry containing process-specific
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| 75 | * logs.
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| 76 |
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| 77 | struct binderfs_info {
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| 78 | struct ipc_namespace *ipc_ns;
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| 79 | struct dentry *control_dentry;
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| 80 | kuid_t root_uid;
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| 81 | kgid_t root_gid;
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| 82 | struct binderfs_mount_opts mount_opts;
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| 83 | int device_count;
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| 84 | struct dentry *proc_log_dir;
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| 85 | };
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| 86 |
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| 87 | #endif
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