Feat Request: Port RROS kernel onto `Error` of Linux 6.6

[shannmu]

What we have done

We added some code in error.rs to enable RROS kernel
See

RROS/rust/kernel/error.rs

Lines 103 to 184 in a39ff9d

	#[cfg(CONFIG_RROS)]
	pub const EINVAL: Self = Error(-(bindings::EINVAL as i32));
	/// Out of memory.
	#[cfg(CONFIG_RROS)]
	pub const ENOMEM: Self = Error(-(bindings::ENOMEM as i32));
	/// Bad address.
	#[cfg(CONFIG_RROS)]
	pub const EFAULT: Self = Error(-(bindings::EFAULT as i32));
	/// Illegal seek.
	#[cfg(CONFIG_RROS)]
	pub const ESPIPE: Self = Error(-(bindings::ESPIPE as i32));
	/// Try again.
	#[cfg(CONFIG_RROS)]
	pub const EAGAIN: Self = Error(-(bindings::EAGAIN as i32));
	/// Device or resource busy.
	#[cfg(CONFIG_RROS)]
	pub const EBUSY: Self = Error(-(bindings::EBUSY as i32));
	/// Restart the system call.
	#[cfg(CONFIG_RROS)]
	pub const ERESTARTSYS: Self = Error(-(bindings::ERESTARTSYS as i32));
	/// Operation not permitted.
	#[cfg(CONFIG_RROS)]
	pub const EPERM: Self = Error(-(bindings::EPERM as i32));
	/// No such process.
	#[cfg(CONFIG_RROS)]
	pub const ESRCH: Self = Error(-(bindings::ESRCH as i32));
	/// No such file or directory.
	#[cfg(CONFIG_RROS)]
	pub const ENOENT: Self = Error(-(bindings::ENOENT as i32));
	/// Interrupted system call.
	#[cfg(CONFIG_RROS)]
	pub const EINTR: Self = Error(-(bindings::EINTR as i32));
	/// Bad file number.
	#[cfg(CONFIG_RROS)]
	pub const EBADF: Self = Error(-(bindings::EBADF as i32));
	/// Resource deadlock would occur
	#[cfg(CONFIG_RROS)]
	pub const EDEADLK: Self = Error(-(bindings::EDEADLK as i32));
	/// Connection timed out
	#[cfg(CONFIG_RROS)]
	pub const ETIMEDOUT: Self = Error(-(bindings::ETIMEDOUT as i32));
	/// Owner died
	#[cfg(CONFIG_RROS)]
	pub const EOWNERDEAD: Self = Error(-(bindings::EOWNERDEAD as i32));
	/// Identifier removed
	#[cfg(CONFIG_RROS)]
	pub const EIDRM: Self = Error(-(bindings::EIDRM as i32));
	/// Stale file handle
	#[cfg(CONFIG_RROS)]
	pub const ESTALE: Self = Error(-(bindings::ESTALE as i32));
	/// Not a typewriter
	#[cfg(CONFIG_RROS)]
	pub const ENOTTY: Self = Error(-(bindings::ENOTTY as i32));
	/// No such device or address
	#[cfg(CONFIG_RROS)]
	pub const ENXIO: Self = Error(-(bindings::ENXIO as i32));
	/// File exists
	#[cfg(CONFIG_RROS)]
	pub const EEXIST: Self = Error(-(bindings::EEXIST as i32));
	/// Poll cycles
	#[cfg(CONFIG_RROS)]
	pub const ELOOP: Self = Error(-(bindings::ELOOP as i32));

Wat we should do next

Remove the above code I mentioned and use new Error wrapper in RROS kernel
See

RROS/rust/kernel/error.rs

Lines 35 to 87 in a39ff9d

	declare_err!(EPERM, "Operation not permitted.");
	declare_err!(ENOENT, "No such file or directory.");
	declare_err!(ESRCH, "No such process.");
	declare_err!(EINTR, "Interrupted system call.");
	declare_err!(EIO, "I/O error.");
	declare_err!(ENXIO, "No such device or address.");
	declare_err!(E2BIG, "Argument list too long.");
	declare_err!(ENOEXEC, "Exec format error.");
	declare_err!(EBADF, "Bad file number.");
	declare_err!(ECHILD, "No child processes.");
	declare_err!(EAGAIN, "Try again.");
	declare_err!(ENOMEM, "Out of memory.");
	declare_err!(EACCES, "Permission denied.");
	declare_err!(EFAULT, "Bad address.");
	declare_err!(ENOTBLK, "Block device required.");
	declare_err!(EBUSY, "Device or resource busy.");
	declare_err!(EEXIST, "File exists.");
	declare_err!(EXDEV, "Cross-device link.");
	declare_err!(ENODEV, "No such device.");
	declare_err!(ENOTDIR, "Not a directory.");
	declare_err!(EISDIR, "Is a directory.");
	declare_err!(EINVAL, "Invalid argument.");
	declare_err!(ENFILE, "File table overflow.");
	declare_err!(EMFILE, "Too many open files.");
	declare_err!(ENOTTY, "Not a typewriter.");
	declare_err!(ETXTBSY, "Text file busy.");
	declare_err!(EFBIG, "File too large.");
	declare_err!(ENOSPC, "No space left on device.");
	declare_err!(ESPIPE, "Illegal seek.");
	declare_err!(EROFS, "Read-only file system.");
	declare_err!(EMLINK, "Too many links.");
	declare_err!(EPIPE, "Broken pipe.");
	declare_err!(EDOM, "Math argument out of domain of func.");
	declare_err!(ERANGE, "Math result not representable.");
	declare_err!(ERESTARTSYS, "Restart the system call.");
	declare_err!(ERESTARTNOINTR, "System call was interrupted by a signal and will be restarted.");
	declare_err!(ERESTARTNOHAND, "Restart if no handler.");
	declare_err!(ENOIOCTLCMD, "No ioctl command.");
	declare_err!(ERESTART_RESTARTBLOCK, "Restart by calling sys_restart_syscall.");
	declare_err!(EPROBE_DEFER, "Driver requests probe retry.");
	declare_err!(EOPENSTALE, "Open found a stale dentry.");
	declare_err!(ENOPARAM, "Parameter not supported.");
	declare_err!(EBADHANDLE, "Illegal NFS file handle.");
	declare_err!(ENOTSYNC, "Update synchronization mismatch.");
	declare_err!(EBADCOOKIE, "Cookie is stale.");
	declare_err!(ENOTSUPP, "Operation is not supported.");
	declare_err!(ETOOSMALL, "Buffer or request is too small.");
	declare_err!(ESERVERFAULT, "An untranslatable error occurred.");
	declare_err!(EBADTYPE, "Type not supported by server.");
	declare_err!(EJUKEBOX, "Request initiated, but will not complete before timeout.");
	declare_err!(EIOCBQUEUED, "iocb queued, will get completion event.");
	declare_err!(ERECALLCONFLICT, "Conflict with recalled state.");
	declare_err!(ENOGRACE, "NFS file lock reclaim refused.");