From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Mon, 8 Jan 2024 01:21:28 +0400 Subject: Initial vendor packages Signed-off-by: Valentin Popov --- vendor/rustix/src/backend/linux_raw/pipe/mod.rs | 2 + .../rustix/src/backend/linux_raw/pipe/syscalls.rs | 135 +++++++++++++++++++++ vendor/rustix/src/backend/linux_raw/pipe/types.rs | 80 ++++++++++++ 3 files changed, 217 insertions(+) create mode 100644 vendor/rustix/src/backend/linux_raw/pipe/mod.rs create mode 100644 vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs create mode 100644 vendor/rustix/src/backend/linux_raw/pipe/types.rs (limited to 'vendor/rustix/src/backend/linux_raw/pipe') diff --git a/vendor/rustix/src/backend/linux_raw/pipe/mod.rs b/vendor/rustix/src/backend/linux_raw/pipe/mod.rs new file mode 100644 index 0000000..1e0181a --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/pipe/mod.rs @@ -0,0 +1,2 @@ +pub(crate) mod syscalls; +pub(crate) mod types; diff --git a/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs b/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs new file mode 100644 index 0000000..ec3e459 --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs @@ -0,0 +1,135 @@ +//! linux_raw syscalls supporting `rustix::pipe`. +//! +//! # Safety +//! +//! See the `rustix::backend` module documentation for details. +#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)] + +use crate::backend::conv::{c_int, c_uint, opt_mut, pass_usize, ret, ret_usize, slice}; +use crate::backend::{c, MAX_IOV}; +use crate::fd::{BorrowedFd, OwnedFd}; +use crate::io; +use crate::pipe::{IoSliceRaw, PipeFlags, SpliceFlags}; +use core::cmp; +use core::mem::MaybeUninit; +use linux_raw_sys::general::{F_GETPIPE_SZ, F_SETPIPE_SZ}; + +#[inline] +pub(crate) fn pipe() -> io::Result<(OwnedFd, OwnedFd)> { + // aarch64 and risc64 omit `__NR_pipe`. On mips, `__NR_pipe` uses a special + // calling convention, but using it is not worth complicating our syscall + // wrapping infrastructure at this time. + #[cfg(any( + target_arch = "aarch64", + target_arch = "mips", + target_arch = "mips32r6", + target_arch = "mips64", + target_arch = "mips64r6", + target_arch = "riscv64", + ))] + { + pipe_with(PipeFlags::empty()) + } + #[cfg(not(any( + target_arch = "aarch64", + target_arch = "mips", + target_arch = "mips32r6", + target_arch = "mips64", + target_arch = "mips64r6", + target_arch = "riscv64", + )))] + unsafe { + let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit(); + ret(syscall!(__NR_pipe, &mut result))?; + let [p0, p1] = result.assume_init(); + Ok((p0, p1)) + } +} + +#[inline] +pub(crate) fn pipe_with(flags: PipeFlags) -> io::Result<(OwnedFd, OwnedFd)> { + unsafe { + let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit(); + ret(syscall!(__NR_pipe2, &mut result, flags))?; + let [p0, p1] = result.assume_init(); + Ok((p0, p1)) + } +} + +#[inline] +pub fn splice( + fd_in: BorrowedFd<'_>, + off_in: Option<&mut u64>, + fd_out: BorrowedFd<'_>, + off_out: Option<&mut u64>, + len: usize, + flags: SpliceFlags, +) -> io::Result { + unsafe { + ret_usize(syscall!( + __NR_splice, + fd_in, + opt_mut(off_in), + fd_out, + opt_mut(off_out), + pass_usize(len), + flags + )) + } +} + +#[inline] +pub unsafe fn vmsplice( + fd: BorrowedFd<'_>, + bufs: &[IoSliceRaw<'_>], + flags: SpliceFlags, +) -> io::Result { + let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]); + ret_usize(syscall!(__NR_vmsplice, fd, bufs_addr, bufs_len, flags)) +} + +#[inline] +pub fn tee( + fd_in: BorrowedFd<'_>, + fd_out: BorrowedFd<'_>, + len: usize, + flags: SpliceFlags, +) -> io::Result { + unsafe { ret_usize(syscall!(__NR_tee, fd_in, fd_out, pass_usize(len), flags)) } +} + +#[inline] +pub(crate) fn fcntl_getpipe_sz(fd: BorrowedFd<'_>) -> io::Result { + #[cfg(target_pointer_width = "32")] + unsafe { + ret_usize(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETPIPE_SZ))) + } + #[cfg(target_pointer_width = "64")] + unsafe { + ret_usize(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETPIPE_SZ))) + } +} + +#[inline] +pub(crate) fn fcntl_setpipe_sz(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> { + let size: c::c_int = size.try_into().map_err(|_| io::Errno::PERM)?; + + #[cfg(target_pointer_width = "32")] + unsafe { + ret(syscall_readonly!( + __NR_fcntl64, + fd, + c_uint(F_SETPIPE_SZ), + c_int(size) + )) + } + #[cfg(target_pointer_width = "64")] + unsafe { + ret(syscall_readonly!( + __NR_fcntl, + fd, + c_uint(F_SETPIPE_SZ), + c_int(size) + )) + } +} diff --git a/vendor/rustix/src/backend/linux_raw/pipe/types.rs b/vendor/rustix/src/backend/linux_raw/pipe/types.rs new file mode 100644 index 0000000..2d1ed9a --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/pipe/types.rs @@ -0,0 +1,80 @@ +use crate::backend::c; +use bitflags::bitflags; +use core::marker::PhantomData; + +bitflags! { + /// `O_*` constants for use with [`pipe_with`]. + /// + /// [`pipe_with`]: crate::pipe::pipe_with + #[repr(transparent)] + #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct PipeFlags: c::c_uint { + /// `O_CLOEXEC` + const CLOEXEC = linux_raw_sys::general::O_CLOEXEC; + /// `O_DIRECT` + const DIRECT = linux_raw_sys::general::O_DIRECT; + /// `O_NONBLOCK` + const NONBLOCK = linux_raw_sys::general::O_NONBLOCK; + + /// + const _ = !0; + } +} + +bitflags! { + /// `SPLICE_F_*` constants for use with [`splice`], [`vmsplice`], and + /// [`tee`]. + #[repr(transparent)] + #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct SpliceFlags: c::c_uint { + /// `SPLICE_F_MOVE` + const MOVE = linux_raw_sys::general::SPLICE_F_MOVE; + /// `SPLICE_F_NONBLOCK` + const NONBLOCK = linux_raw_sys::general::SPLICE_F_NONBLOCK; + /// `SPLICE_F_MORE` + const MORE = linux_raw_sys::general::SPLICE_F_MORE; + /// `SPLICE_F_GIFT` + const GIFT = linux_raw_sys::general::SPLICE_F_GIFT; + + /// + const _ = !0; + } +} + +/// A buffer type for use with [`vmsplice`]. +/// +/// It is guaranteed to be ABI compatible with the iovec type on Unix platforms +/// and `WSABUF` on Windows. Unlike `IoSlice` and `IoSliceMut` it is +/// semantically like a raw pointer, and therefore can be shared or mutated as +/// needed. +/// +/// [`vmsplice`]: crate::pipe::vmsplice +#[repr(transparent)] +pub struct IoSliceRaw<'a> { + _buf: c::iovec, + _lifetime: PhantomData<&'a ()>, +} + +impl<'a> IoSliceRaw<'a> { + /// Creates a new `IoSlice` wrapping a byte slice. + pub fn from_slice(buf: &'a [u8]) -> Self { + IoSliceRaw { + _buf: c::iovec { + iov_base: (buf.as_ptr() as *mut u8).cast::(), + iov_len: buf.len() as _, + }, + _lifetime: PhantomData, + } + } + + /// Creates a new `IoSlice` wrapping a mutable byte slice. + pub fn from_slice_mut(buf: &'a mut [u8]) -> Self { + IoSliceRaw { + _buf: c::iovec { + iov_base: buf.as_mut_ptr().cast::(), + iov_len: buf.len() as _, + }, + _lifetime: PhantomData, + } + } +} -- cgit v1.2.3