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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2025 Google LLC.
use core::panic::Location;use kernel::fmt;use kernel::prelude::*;
use crate::defs::*;
pub(crate) type BinderResult<T = ()> = core::result::Result<T, BinderError>;
/// Wraps a `&'static Location` to format it as `filename.rs:line` without the directory prefix.#[derive(Copy, Clone)]#[repr(transparent)]pub(crate) struct ErrorLocation(&'static Location<'static>);
// SAFETY: `ErrorLocation` is `repr(transparent)` over a shared reference, which is part of the// option layout optimization guarantee, so all zeroes is a valid representation for `None`.unsafe impl pin_init::ZeroableOption for ErrorLocation {}
impl ErrorLocation { #[track_caller] pub(crate) const fn caller() -> Self { Self(Location::caller()) }}
impl fmt::Display for ErrorLocation { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { let file = match self.0.file().rsplit_once('/') { Some((_, file)) => file, None => self.0.file(), }; write!(f, "{}:{}", file, self.0.line()) }}
/// An error that will be returned to userspace via the `BINDER_WRITE_READ` ioctl rather than via/// errno.pub(crate) struct BinderError { pub(crate) reply: u32, pub(crate) source: Option<Error>, pub(crate) line: ErrorLocation,}
impl BinderError { #[track_caller] pub(crate) fn new_dead() -> Self { Self { reply: BR_DEAD_REPLY, source: None, line: ErrorLocation::caller(), } }
#[track_caller] pub(crate) fn new_frozen() -> Self { Self { reply: BR_FROZEN_REPLY, source: None, line: ErrorLocation::caller(), } }
#[track_caller] pub(crate) fn new_frozen_oneway() -> Self { Self { reply: BR_TRANSACTION_PENDING_FROZEN, source: None, line: ErrorLocation::caller(), } }}
/// Convert an errno into a `BinderError` and store the errno used to construct it. The errno/// should be stored as the thread's extended error when given to userspace.impl From<Error> for BinderError { #[track_caller] fn from(source: Error) -> Self { Self { reply: BR_FAILED_REPLY, source: Some(source), line: ErrorLocation::caller(), } }}
impl From<kernel::fs::file::BadFdError> for BinderError { #[track_caller] fn from(source: kernel::fs::file::BadFdError) -> Self { BinderError::from(Error::from(source)) }}
impl From<kernel::alloc::AllocError> for BinderError { #[track_caller] fn from(_: kernel::alloc::AllocError) -> Self { Self { reply: BR_FAILED_REPLY, source: Some(ENOMEM), line: ErrorLocation::caller(), } }}
impl fmt::Debug for BinderError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { match self.reply { BR_FAILED_REPLY => match self.source.as_ref() { Some(source) => source.fmt(f), None => f.pad("BR_FAILED_REPLY"), }, BR_DEAD_REPLY => f.pad("BR_DEAD_REPLY"), BR_FROZEN_REPLY => f.pad("BR_FROZEN_REPLY"), BR_TRANSACTION_PENDING_FROZEN => f.pad("BR_TRANSACTION_PENDING_FROZEN"), BR_TRANSACTION_COMPLETE => f.pad("BR_TRANSACTION_COMPLETE"), _ => match self.source.as_ref() { Some(source) => source.fmt(f), None => self.reply.fmt(f), }, } }}