diff options
Diffstat (limited to 'vendor/rustix/src/backend/linux_raw/fs/syscalls.rs')
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/fs/syscalls.rs | 485 |
1 files changed, 225 insertions, 260 deletions
diff --git a/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs b/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs index d0d855cc1..78a2088b2 100644 --- a/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs +++ b/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs @@ -4,16 +4,16 @@ //! //! See the `rustix::backend` module documentation for details. #![allow(unsafe_code)] -#![allow(dead_code)] #![allow(clippy::undocumented_unsafe_blocks)] -use super::super::c; -use super::super::conv::{ - by_ref, c_int, c_uint, dev_t, oflags_for_open_how, opt_mut, pass_usize, raw_fd, ret, ret_c_int, - ret_c_uint, ret_infallible, ret_owned_fd, ret_usize, size_of, slice, slice_mut, zero, +use crate::backend::c; +use crate::backend::conv::fs::oflags_for_open_how; +use crate::backend::conv::{ + by_ref, c_int, c_uint, dev_t, opt_mut, pass_usize, raw_fd, ret, ret_c_int, ret_c_uint, + ret_infallible, ret_owned_fd, ret_usize, size_of, slice, slice_mut, zero, }; #[cfg(target_pointer_width = "64")] -use super::super::conv::{loff_t, loff_t_from_u64, ret_u64}; +use crate::backend::conv::{loff_t, loff_t_from_u64, ret_u64}; #[cfg(any( target_arch = "aarch64", target_arch = "riscv64", @@ -23,98 +23,77 @@ use super::super::conv::{loff_t, loff_t_from_u64, ret_u64}; use crate::fd::AsFd; use crate::fd::{BorrowedFd, OwnedFd}; use crate::ffi::CStr; +#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] +use crate::fs::CWD; use crate::fs::{ - inotify, Access, Advice, AtFlags, FallocateFlags, FileType, FlockOperation, MemfdFlags, Mode, - OFlags, RenameFlags, ResolveFlags, SealFlags, Stat, StatFs, StatVfs, StatVfsMountFlags, - StatxFlags, Timestamps, XattrFlags, + inotify, Access, Advice, AtFlags, FallocateFlags, FileType, FlockOperation, Gid, MemfdFlags, + Mode, OFlags, RenameFlags, ResolveFlags, SealFlags, SeekFrom, Stat, StatFs, StatVfs, + StatVfsMountFlags, StatxFlags, Timestamps, Uid, XattrFlags, }; -use crate::io::{self, SeekFrom}; -use crate::process::{Gid, Uid}; -#[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] -use core::convert::TryInto; -use core::mem::MaybeUninit; +use crate::io; +use core::mem::{transmute, zeroed, MaybeUninit}; #[cfg(target_arch = "mips64")] use linux_raw_sys::general::stat as linux_stat64; use linux_raw_sys::general::{ __kernel_fsid_t, __kernel_timespec, open_how, statx, AT_EACCESS, AT_FDCWD, AT_REMOVEDIR, - AT_SYMLINK_NOFOLLOW, F_ADD_SEALS, F_GETFL, F_GETLEASE, F_GETOWN, F_GETPIPE_SZ, F_GETSIG, - F_GET_SEALS, F_SETFL, F_SETPIPE_SZ, SEEK_CUR, SEEK_DATA, SEEK_END, SEEK_HOLE, SEEK_SET, - STATX__RESERVED, + AT_SYMLINK_NOFOLLOW, F_ADD_SEALS, F_GETFL, F_GET_SEALS, F_SETFL, SEEK_CUR, SEEK_DATA, SEEK_END, + SEEK_HOLE, SEEK_SET, STATX__RESERVED, }; +use linux_raw_sys::ioctl::{BLKPBSZGET, BLKSSZGET, EXT4_IOC_RESIZE_FS, FICLONE}; #[cfg(target_pointer_width = "32")] use { - super::super::conv::{hi, lo, slice_just_addr}, + crate::backend::conv::{hi, lo, slice_just_addr}, linux_raw_sys::general::stat64 as linux_stat64, linux_raw_sys::general::timespec as __kernel_old_timespec, }; #[inline] -pub(crate) fn open(filename: &CStr, flags: OFlags, mode: Mode) -> io::Result<OwnedFd> { +pub(crate) fn open(path: &CStr, flags: OFlags, mode: Mode) -> io::Result<OwnedFd> { + // Always enable support for large files. + let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE); + #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] { - openat(crate::fs::cwd().as_fd(), filename, flags, mode) + openat(CWD.as_fd(), path, flags, mode) } - #[cfg(all( - target_pointer_width = "32", - not(any(target_arch = "aarch64", target_arch = "riscv64")), - ))] + #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))] unsafe { - ret_owned_fd(syscall_readonly!(__NR_open, filename, flags, mode)) - } - #[cfg(all( - target_pointer_width = "64", - not(any(target_arch = "aarch64", target_arch = "riscv64")), - ))] - unsafe { - ret_owned_fd(syscall_readonly!(__NR_open, filename, flags, mode)) + ret_owned_fd(syscall_readonly!(__NR_open, path, flags, mode)) } } #[inline] pub(crate) fn openat( dirfd: BorrowedFd<'_>, - filename: &CStr, + path: &CStr, flags: OFlags, mode: Mode, ) -> io::Result<OwnedFd> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_owned_fd(syscall_readonly!(__NR_openat, dirfd, filename, flags, mode)) - } - #[cfg(target_pointer_width = "64")] - unsafe { - ret_owned_fd(syscall_readonly!(__NR_openat, dirfd, filename, flags, mode)) - } + // Always enable support for large files. + let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE); + + unsafe { ret_owned_fd(syscall_readonly!(__NR_openat, dirfd, path, flags, mode)) } } #[inline] pub(crate) fn openat2( dirfd: BorrowedFd<'_>, - pathname: &CStr, - flags: OFlags, + path: &CStr, + mut flags: OFlags, mode: Mode, resolve: ResolveFlags, ) -> io::Result<OwnedFd> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_owned_fd(syscall_readonly!( - __NR_openat2, - dirfd, - pathname, - by_ref(&open_how { - flags: oflags_for_open_how(flags), - mode: u64::from(mode.bits()), - resolve: resolve.bits(), - }), - size_of::<open_how, _>() - )) + // Enable support for large files, but not with `O_PATH` because + // `openat2` doesn't like those flags together. + if !flags.contains(OFlags::PATH) { + flags |= OFlags::from_bits_retain(c::O_LARGEFILE); } - #[cfg(target_pointer_width = "64")] + unsafe { ret_owned_fd(syscall_readonly!( __NR_openat2, dirfd, - pathname, + path, by_ref(&open_how { flags: oflags_for_open_how(flags), mode: u64::from(mode.bits()), @@ -126,12 +105,12 @@ pub(crate) fn openat2( } #[inline] -pub(crate) fn chmod(filename: &CStr, mode: Mode) -> io::Result<()> { +pub(crate) fn chmod(path: &CStr, mode: Mode) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_fchmodat, raw_fd(AT_FDCWD), - filename, + path, mode )) } @@ -140,7 +119,7 @@ pub(crate) fn chmod(filename: &CStr, mode: Mode) -> io::Result<()> { #[inline] pub(crate) fn chmodat( dirfd: BorrowedFd<'_>, - filename: &CStr, + path: &CStr, mode: Mode, flags: AtFlags, ) -> io::Result<()> { @@ -150,7 +129,7 @@ pub(crate) fn chmodat( if !flags.is_empty() { return Err(io::Errno::INVAL); } - unsafe { ret(syscall_readonly!(__NR_fchmodat, dirfd, filename, mode)) } + unsafe { ret(syscall_readonly!(__NR_fchmodat, dirfd, path, mode)) } } #[inline] @@ -161,17 +140,17 @@ pub(crate) fn fchmod(fd: BorrowedFd<'_>, mode: Mode) -> io::Result<()> { #[inline] pub(crate) fn chownat( dirfd: BorrowedFd<'_>, - filename: &CStr, + path: &CStr, owner: Option<Uid>, group: Option<Gid>, flags: AtFlags, ) -> io::Result<()> { unsafe { - let (ow, gr) = crate::process::translate_fchown_args(owner, group); + let (ow, gr) = crate::ugid::translate_fchown_args(owner, group); ret(syscall_readonly!( __NR_fchownat, dirfd, - filename, + path, c_uint(ow), c_uint(gr), flags @@ -182,7 +161,7 @@ pub(crate) fn chownat( #[inline] pub(crate) fn fchown(fd: BorrowedFd<'_>, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> { unsafe { - let (ow, gr) = crate::process::translate_fchown_args(owner, group); + let (ow, gr) = crate::ugid::translate_fchown_args(owner, group); ret(syscall_readonly!(__NR_fchown, fd, c_uint(ow), c_uint(gr))) } } @@ -190,7 +169,7 @@ pub(crate) fn fchown(fd: BorrowedFd<'_>, owner: Option<Uid>, group: Option<Gid>) #[inline] pub(crate) fn mknodat( dirfd: BorrowedFd<'_>, - filename: &CStr, + path: &CStr, file_type: FileType, mode: Mode, dev: u64, @@ -200,7 +179,7 @@ pub(crate) fn mknodat( ret(syscall_readonly!( __NR_mknodat, dirfd, - filename, + path, (mode, file_type), dev_t(dev)? )) @@ -210,7 +189,7 @@ pub(crate) fn mknodat( ret(syscall_readonly!( __NR_mknodat, dirfd, - filename, + path, (mode, file_type), dev_t(dev) )) @@ -442,9 +421,15 @@ pub(crate) fn sync() { #[inline] pub(crate) fn fstat(fd: BorrowedFd<'_>) -> io::Result<Stat> { + // 32-bit and mips64 Linux: `struct stat64` is not y2038 compatible; use + // `statx`. + // + // And, some old platforms don't support `statx`, and some fail with a + // confusing error code, so we call `crate::fs::statx` to handle that. If + // `statx` isn't available, fall back to the buggy system call. #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] { - match statx(fd, cstr!(""), AtFlags::EMPTY_PATH, StatxFlags::BASIC_STATS) { + match crate::fs::statx(fd, cstr!(""), AtFlags::EMPTY_PATH, StatxFlags::BASIC_STATS) { Ok(x) => statx_to_stat(x), Err(io::Errno::NOSYS) => fstat_old(fd), Err(err) => Err(err), @@ -477,17 +462,18 @@ fn fstat_old(fd: BorrowedFd<'_>) -> io::Result<Stat> { } #[inline] -pub(crate) fn stat(filename: &CStr) -> io::Result<Stat> { +pub(crate) fn stat(path: &CStr) -> io::Result<Stat> { + // See the comments in `fstat` about using `crate::fs::statx` here. #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] { - match statx( - crate::fs::cwd().as_fd(), - filename, + match crate::fs::statx( + crate::fs::CWD.as_fd(), + path, AtFlags::empty(), StatxFlags::BASIC_STATS, ) { Ok(x) => statx_to_stat(x), - Err(io::Errno::NOSYS) => stat_old(filename), + Err(io::Errno::NOSYS) => stat_old(path), Err(err) => Err(err), } } @@ -498,7 +484,7 @@ pub(crate) fn stat(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_newfstatat, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(0) ))?; @@ -507,7 +493,7 @@ pub(crate) fn stat(filename: &CStr) -> io::Result<Stat> { } #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] -fn stat_old(filename: &CStr) -> io::Result<Stat> { +fn stat_old(path: &CStr) -> io::Result<Stat> { let mut result = MaybeUninit::<linux_stat64>::uninit(); #[cfg(target_arch = "mips64")] @@ -515,7 +501,7 @@ fn stat_old(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_newfstatat, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(0) ))?; @@ -527,7 +513,7 @@ fn stat_old(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_fstatat64, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(0) ))?; @@ -536,12 +522,13 @@ fn stat_old(filename: &CStr) -> io::Result<Stat> { } #[inline] -pub(crate) fn statat(dirfd: BorrowedFd<'_>, filename: &CStr, flags: AtFlags) -> io::Result<Stat> { +pub(crate) fn statat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> { + // See the comments in `fstat` about using `crate::fs::statx` here. #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] { - match statx(dirfd, filename, flags, StatxFlags::BASIC_STATS) { + match crate::fs::statx(dirfd, path, flags, StatxFlags::BASIC_STATS) { Ok(x) => statx_to_stat(x), - Err(io::Errno::NOSYS) => statat_old(dirfd, filename, flags), + Err(io::Errno::NOSYS) => statat_old(dirfd, path, flags), Err(err) => Err(err), } } @@ -549,58 +536,41 @@ pub(crate) fn statat(dirfd: BorrowedFd<'_>, filename: &CStr, flags: AtFlags) -> #[cfg(all(target_pointer_width = "64", not(target_arch = "mips64")))] unsafe { let mut result = MaybeUninit::<Stat>::uninit(); - ret(syscall!( - __NR_newfstatat, - dirfd, - filename, - &mut result, - flags - ))?; + ret(syscall!(__NR_newfstatat, dirfd, path, &mut result, flags))?; Ok(result.assume_init()) } } #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] -fn statat_old(dirfd: BorrowedFd<'_>, filename: &CStr, flags: AtFlags) -> io::Result<Stat> { +fn statat_old(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> { let mut result = MaybeUninit::<linux_stat64>::uninit(); #[cfg(target_arch = "mips64")] unsafe { - ret(syscall!( - __NR_newfstatat, - dirfd, - filename, - &mut result, - flags - ))?; + ret(syscall!(__NR_newfstatat, dirfd, path, &mut result, flags))?; stat_to_stat(result.assume_init()) } #[cfg(target_pointer_width = "32")] unsafe { - ret(syscall!( - __NR_fstatat64, - dirfd, - filename, - &mut result, - flags - ))?; + ret(syscall!(__NR_fstatat64, dirfd, path, &mut result, flags))?; stat_to_stat(result.assume_init()) } } #[inline] -pub(crate) fn lstat(filename: &CStr) -> io::Result<Stat> { +pub(crate) fn lstat(path: &CStr) -> io::Result<Stat> { + // See the comments in `fstat` about using `crate::fs::statx` here. #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] { - match statx( - crate::fs::cwd().as_fd(), - filename, + match crate::fs::statx( + crate::fs::CWD.as_fd(), + path, AtFlags::SYMLINK_NOFOLLOW, StatxFlags::BASIC_STATS, ) { Ok(x) => statx_to_stat(x), - Err(io::Errno::NOSYS) => lstat_old(filename), + Err(io::Errno::NOSYS) => lstat_old(path), Err(err) => Err(err), } } @@ -611,7 +581,7 @@ pub(crate) fn lstat(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_newfstatat, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(AT_SYMLINK_NOFOLLOW) ))?; @@ -620,7 +590,7 @@ pub(crate) fn lstat(filename: &CStr) -> io::Result<Stat> { } #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))] -fn lstat_old(filename: &CStr) -> io::Result<Stat> { +fn lstat_old(path: &CStr) -> io::Result<Stat> { let mut result = MaybeUninit::<linux_stat64>::uninit(); #[cfg(target_arch = "mips64")] @@ -628,7 +598,7 @@ fn lstat_old(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_newfstatat, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(AT_SYMLINK_NOFOLLOW) ))?; @@ -640,7 +610,7 @@ fn lstat_old(filename: &CStr) -> io::Result<Stat> { ret(syscall!( __NR_fstatat64, raw_fd(AT_FDCWD), - filename, + path, &mut result, c_uint(AT_SYMLINK_NOFOLLOW) ))?; @@ -750,7 +720,7 @@ fn stat_to_stat(s: linux_raw_sys::general::stat) -> io::Result<Stat> { #[inline] pub(crate) fn statx( dirfd: BorrowedFd<'_>, - pathname: &CStr, + path: &CStr, flags: AtFlags, mask: StatxFlags, ) -> io::Result<statx> { @@ -777,7 +747,7 @@ pub(crate) fn statx( ret(syscall!( __NR_statx, dirfd, - pathname, + path, flags, mask, &mut statx_buf @@ -837,13 +807,13 @@ pub(crate) fn fstatvfs(fd: BorrowedFd<'_>) -> io::Result<StatVfs> { } #[inline] -pub(crate) fn statfs(filename: &CStr) -> io::Result<StatFs> { +pub(crate) fn statfs(path: &CStr) -> io::Result<StatFs> { #[cfg(target_pointer_width = "32")] unsafe { let mut result = MaybeUninit::<StatFs>::uninit(); ret(syscall!( __NR_statfs64, - filename, + path, size_of::<StatFs, _>(), &mut result ))?; @@ -852,16 +822,16 @@ pub(crate) fn statfs(filename: &CStr) -> io::Result<StatFs> { #[cfg(target_pointer_width = "64")] unsafe { let mut result = MaybeUninit::<StatFs>::uninit(); - ret(syscall!(__NR_statfs, filename, &mut result))?; + ret(syscall!(__NR_statfs, path, &mut result))?; Ok(result.assume_init()) } } #[inline] -pub(crate) fn statvfs(filename: &CStr) -> io::Result<StatVfs> { +pub(crate) fn statvfs(path: &CStr) -> io::Result<StatVfs> { // Linux doesn't have a `statvfs` syscall; we have to do `statfs` and // translate the fields as best we can. - let statfs = statfs(filename)?; + let statfs = statfs(path)?; Ok(statfs_to_statvfs(statfs)) } @@ -883,8 +853,8 @@ fn statfs_to_statvfs(statfs: StatFs) -> StatVfs { f_files: statfs.f_files as u64, f_ffree: statfs.f_ffree as u64, f_favail: statfs.f_ffree as u64, - f_fsid: f_fsid_val0 as u32 as u64 | ((f_fsid_val1 as u32 as u64) << 32), - f_flag: unsafe { StatVfsMountFlags::from_bits_unchecked(statfs.f_flags as u64) }, + f_fsid: u64::from(f_fsid_val0 as u32) | u64::from(f_fsid_val1 as u32) << 32, + f_flag: StatVfsMountFlags::from_bits_retain(statfs.f_flags as u64), f_namemax: statfs.f_namelen as u64, } } @@ -904,7 +874,11 @@ pub(crate) fn readlink(path: &CStr, buf: &mut [u8]) -> io::Result<usize> { } #[inline] -pub(crate) fn readlinkat(dirfd: BorrowedFd<'_>, path: &CStr, buf: &mut [u8]) -> io::Result<usize> { +pub(crate) fn readlinkat( + dirfd: BorrowedFd<'_>, + path: &CStr, + buf: &mut [MaybeUninit<u8>], +) -> io::Result<usize> { let (buf_addr_mut, buf_len) = slice_mut(buf); unsafe { ret_usize(syscall!( @@ -922,17 +896,19 @@ pub(crate) fn fcntl_getfl(fd: BorrowedFd<'_>) -> io::Result<OFlags> { #[cfg(target_pointer_width = "32")] unsafe { ret_c_uint(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETFL))) - .map(OFlags::from_bits_truncate) + .map(OFlags::from_bits_retain) } #[cfg(target_pointer_width = "64")] unsafe { - ret_c_uint(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETFL))) - .map(OFlags::from_bits_truncate) + ret_c_uint(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETFL))).map(OFlags::from_bits_retain) } } #[inline] pub(crate) fn fcntl_setfl(fd: BorrowedFd<'_>, flags: OFlags) -> io::Result<()> { + // Always enable support for large files. + let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE); + #[cfg(target_pointer_width = "32")] unsafe { ret(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_SETFL), flags)) @@ -944,86 +920,16 @@ pub(crate) fn fcntl_setfl(fd: BorrowedFd<'_>, flags: OFlags) -> io::Result<()> { } #[inline] -pub(crate) fn fcntl_getlease(fd: BorrowedFd<'_>) -> io::Result<c::c_int> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETLEASE))) - } - #[cfg(target_pointer_width = "64")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETLEASE))) - } -} - -#[inline] -pub(crate) fn fcntl_getown(fd: BorrowedFd<'_>) -> io::Result<c::c_int> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETOWN))) - } - #[cfg(target_pointer_width = "64")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETOWN))) - } -} - -#[inline] -pub(crate) fn fcntl_getsig(fd: BorrowedFd<'_>) -> io::Result<c::c_int> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETSIG))) - } - #[cfg(target_pointer_width = "64")] - unsafe { - ret_c_int(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETSIG))) - } -} - -#[inline] -pub(crate) fn fcntl_getpipe_sz(fd: BorrowedFd<'_>) -> io::Result<usize> { - #[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: c::c_int) -> io::Result<usize> { - #[cfg(target_pointer_width = "32")] - unsafe { - ret_usize(syscall_readonly!( - __NR_fcntl64, - fd, - c_uint(F_SETPIPE_SZ), - c_int(size) - )) - } - #[cfg(target_pointer_width = "64")] - unsafe { - ret_usize(syscall_readonly!( - __NR_fcntl, - fd, - c_uint(F_SETPIPE_SZ), - c_int(size) - )) - } -} - -#[inline] pub(crate) fn fcntl_get_seals(fd: BorrowedFd<'_>) -> io::Result<SealFlags> { #[cfg(target_pointer_width = "32")] unsafe { ret_c_int(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GET_SEALS))) - .map(|seals| SealFlags::from_bits_unchecked(seals as u32)) + .map(|seals| SealFlags::from_bits_retain(seals as u32)) } #[cfg(target_pointer_width = "64")] unsafe { ret_c_int(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GET_SEALS))) - .map(|seals| SealFlags::from_bits_unchecked(seals as u32)) + .map(|seals| SealFlags::from_bits_retain(seals as u32)) } } @@ -1077,7 +983,7 @@ pub(crate) fn fcntl_lock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::R l_start: 0, l_len: 0, - ..core::mem::zeroed() + ..zeroed() }; #[cfg(target_pointer_width = "32")] @@ -1102,15 +1008,15 @@ pub(crate) fn fcntl_lock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::R } #[inline] -pub(crate) fn rename(oldname: &CStr, newname: &CStr) -> io::Result<()> { +pub(crate) fn rename(old_path: &CStr, new_path: &CStr) -> io::Result<()> { #[cfg(target_arch = "riscv64")] unsafe { ret(syscall_readonly!( __NR_renameat2, raw_fd(AT_FDCWD), - oldname, + old_path, raw_fd(AT_FDCWD), - newname, + new_path, c_uint(0) )) } @@ -1119,9 +1025,9 @@ pub(crate) fn rename(oldname: &CStr, newname: &CStr) -> io::Result<()> { ret(syscall_readonly!( __NR_renameat, raw_fd(AT_FDCWD), - oldname, + old_path, raw_fd(AT_FDCWD), - newname + new_path )) } } @@ -1129,18 +1035,18 @@ pub(crate) fn rename(oldname: &CStr, newname: &CStr) -> io::Result<()> { #[inline] pub(crate) fn renameat( old_dirfd: BorrowedFd<'_>, - oldname: &CStr, + old_path: &CStr, new_dirfd: BorrowedFd<'_>, - newname: &CStr, + new_path: &CStr, ) -> io::Result<()> { #[cfg(target_arch = "riscv64")] unsafe { ret(syscall_readonly!( __NR_renameat2, old_dirfd, - oldname, + old_path, new_dirfd, - newname, + new_path, c_uint(0) )) } @@ -1149,9 +1055,9 @@ pub(crate) fn renameat( ret(syscall_readonly!( __NR_renameat, old_dirfd, - oldname, + old_path, new_dirfd, - newname + new_path )) } } @@ -1159,61 +1065,61 @@ pub(crate) fn renameat( #[inline] pub(crate) fn renameat2( old_dirfd: BorrowedFd<'_>, - oldname: &CStr, + old_path: &CStr, new_dirfd: BorrowedFd<'_>, - newname: &CStr, + new_path: &CStr, flags: RenameFlags, ) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_renameat2, old_dirfd, - oldname, + old_path, new_dirfd, - newname, + new_path, flags )) } } #[inline] -pub(crate) fn unlink(pathname: &CStr) -> io::Result<()> { +pub(crate) fn unlink(path: &CStr) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_unlinkat, raw_fd(AT_FDCWD), - pathname, + path, c_uint(0) )) } } #[inline] -pub(crate) fn unlinkat(dirfd: BorrowedFd<'_>, pathname: &CStr, flags: AtFlags) -> io::Result<()> { - unsafe { ret(syscall_readonly!(__NR_unlinkat, dirfd, pathname, flags)) } +pub(crate) fn unlinkat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<()> { + unsafe { ret(syscall_readonly!(__NR_unlinkat, dirfd, path, flags)) } } #[inline] -pub(crate) fn rmdir(pathname: &CStr) -> io::Result<()> { +pub(crate) fn rmdir(path: &CStr) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_unlinkat, raw_fd(AT_FDCWD), - pathname, + path, c_uint(AT_REMOVEDIR) )) } } #[inline] -pub(crate) fn link(oldname: &CStr, newname: &CStr) -> io::Result<()> { +pub(crate) fn link(old_path: &CStr, new_path: &CStr) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_linkat, raw_fd(AT_FDCWD), - oldname, + old_path, raw_fd(AT_FDCWD), - newname, + new_path, c_uint(0) )) } @@ -1222,55 +1128,55 @@ pub(crate) fn link(oldname: &CStr, newname: &CStr) -> io::Result<()> { #[inline] pub(crate) fn linkat( old_dirfd: BorrowedFd<'_>, - oldname: &CStr, + old_path: &CStr, new_dirfd: BorrowedFd<'_>, - newname: &CStr, + new_path: &CStr, flags: AtFlags, ) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_linkat, old_dirfd, - oldname, + old_path, new_dirfd, - newname, + new_path, flags )) } } #[inline] -pub(crate) fn symlink(oldname: &CStr, newname: &CStr) -> io::Result<()> { +pub(crate) fn symlink(old_path: &CStr, new_path: &CStr) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_symlinkat, - oldname, + old_path, raw_fd(AT_FDCWD), - newname + new_path )) } } #[inline] -pub(crate) fn symlinkat(oldname: &CStr, dirfd: BorrowedFd<'_>, newname: &CStr) -> io::Result<()> { - unsafe { ret(syscall_readonly!(__NR_symlinkat, oldname, dirfd, newname)) } +pub(crate) fn symlinkat(old_path: &CStr, dirfd: BorrowedFd<'_>, new_path: &CStr) -> io::Result<()> { + unsafe { ret(syscall_readonly!(__NR_symlinkat, old_path, dirfd, new_path)) } } #[inline] -pub(crate) fn mkdir(pathname: &CStr, mode: Mode) -> io::Result<()> { +pub(crate) fn mkdir(path: &CStr, mode: Mode) -> io::Result<()> { unsafe { ret(syscall_readonly!( __NR_mkdirat, raw_fd(AT_FDCWD), - pathname, + path, mode )) } } #[inline] -pub(crate) fn mkdirat(dirfd: BorrowedFd<'_>, pathname: &CStr, mode: Mode) -> io::Result<()> { - unsafe { ret(syscall_readonly!(__NR_mkdirat, dirfd, pathname, mode)) } +pub(crate) fn mkdirat(dirfd: BorrowedFd<'_>, path: &CStr, mode: Mode) -> io::Result<()> { + unsafe { ret(syscall_readonly!(__NR_mkdirat, dirfd, path, mode)) } } #[inline] @@ -1293,33 +1199,35 @@ pub(crate) fn getdents_uninit( #[inline] pub(crate) fn utimensat( dirfd: BorrowedFd<'_>, - pathname: &CStr, + path: &CStr, times: &Timestamps, flags: AtFlags, ) -> io::Result<()> { - _utimensat(dirfd, Some(pathname), times, flags) + _utimensat(dirfd, Some(path), times, flags) } #[inline] fn _utimensat( dirfd: BorrowedFd<'_>, - pathname: Option<&CStr>, + path: Option<&CStr>, times: &Timestamps, flags: AtFlags, ) -> io::Result<()> { // Assert that `Timestamps` has the expected layout. - let _ = unsafe { core::mem::transmute::<Timestamps, [__kernel_timespec; 2]>(times.clone()) }; + let _ = unsafe { transmute::<Timestamps, [__kernel_timespec; 2]>(times.clone()) }; + // `utimensat_time64` was introduced in Linux 5.1. The old `utimensat` + // syscall is not y2038-compatible on 32-bit architectures. #[cfg(target_pointer_width = "32")] unsafe { match ret(syscall_readonly!( __NR_utimensat_time64, dirfd, - pathname, + path, by_ref(times), flags )) { - Err(io::Errno::NOSYS) => _utimensat_old(dirfd, pathname, times, flags), + Err(io::Errno::NOSYS) => _utimensat_old(dirfd, path, times, flags), otherwise => otherwise, } } @@ -1328,7 +1236,7 @@ fn _utimensat( ret(syscall_readonly!( __NR_utimensat, dirfd, - pathname, + path, by_ref(times), flags )) @@ -1338,7 +1246,7 @@ fn _utimensat( #[cfg(target_pointer_width = "32")] unsafe fn _utimensat_old( dirfd: BorrowedFd<'_>, - pathname: Option<&CStr>, + path: Option<&CStr>, times: &Timestamps, flags: AtFlags, ) -> io::Result<()> { @@ -1375,7 +1283,7 @@ unsafe fn _utimensat_old( ret(syscall_readonly!( __NR_utimensat, dirfd, - pathname, + path, old_times_addr, flags )) @@ -1386,6 +1294,19 @@ pub(crate) fn futimens(fd: BorrowedFd<'_>, times: &Timestamps) -> io::Result<()> _utimensat(fd, None, times, AtFlags::empty()) } +#[inline] +pub(crate) fn access(path: &CStr, access: Access) -> io::Result<()> { + #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] + { + accessat_noflags(CWD.as_fd(), path, access) + } + + #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))] + unsafe { + ret(syscall_readonly!(__NR_access, path, access)) + } +} + pub(crate) fn accessat( dirfd: BorrowedFd<'_>, path: &CStr, @@ -1400,36 +1321,47 @@ pub(crate) fn accessat( } // Linux's `faccessat` syscall doesn't have a flags argument, so if we have - // any flags, use the newer `faccessat2` which does. Unless we're on - // Android where using newer system calls can cause seccomp to abort the - // process. + // any flags, use the newer `faccessat2` introduced in Linux 5.8 which + // does. Unless we're on Android where using newer system calls can cause + // seccomp to abort the process. #[cfg(not(target_os = "android"))] if !flags.is_empty() { - return unsafe { - ret(syscall_readonly!( + unsafe { + match ret(syscall_readonly!( __NR_faccessat2, dirfd, path, access, flags - )) - }; + )) { + Ok(()) => return Ok(()), + Err(io::Errno::NOSYS) => {} + Err(other) => return Err(other), + } + } } // Linux's `faccessat` doesn't have a flags parameter. If we have // `AT_EACCESS` and we're not setuid or setgid, we can emulate it. if flags.is_empty() || (flags.bits() == AT_EACCESS - && crate::process::getuid() == crate::process::geteuid() - && crate::process::getgid() == crate::process::getegid()) + && crate::backend::ugid::syscalls::getuid() + == crate::backend::ugid::syscalls::geteuid() + && crate::backend::ugid::syscalls::getgid() + == crate::backend::ugid::syscalls::getegid()) { - return unsafe { ret(syscall_readonly!(__NR_faccessat, dirfd, path, access)) }; + return accessat_noflags(dirfd, path, access); } Err(io::Errno::NOSYS) } #[inline] +fn accessat_noflags(dirfd: BorrowedFd<'_>, path: &CStr, access: Access) -> io::Result<()> { + unsafe { ret(syscall_readonly!(__NR_faccessat, dirfd, path, access)) } +} + +#[inline] pub(crate) fn copy_file_range( fd_in: BorrowedFd<'_>, off_in: Option<&mut u64>, @@ -1485,7 +1417,6 @@ pub(crate) fn sendfile( } #[inline] -#[cfg(any(target_os = "android", target_os = "linux"))] pub(crate) fn mount( source: Option<&CStr>, target: &CStr, @@ -1506,7 +1437,6 @@ pub(crate) fn mount( } #[inline] -#[cfg(any(target_os = "android", target_os = "linux"))] pub(crate) fn unmount(target: &CStr, flags: super::types::UnmountFlags) -> io::Result<()> { unsafe { ret(syscall_readonly!(__NR_umount2, target, flags)) } } @@ -1652,15 +1582,50 @@ pub(crate) fn flistxattr(fd: BorrowedFd<'_>, list: &mut [c::c_char]) -> io::Resu #[inline] pub(crate) fn removexattr(path: &CStr, name: &CStr) -> io::Result<()> { - unsafe { ret(syscall!(__NR_removexattr, path, name)) } + unsafe { ret(syscall_readonly!(__NR_removexattr, path, name)) } } #[inline] pub(crate) fn lremovexattr(path: &CStr, name: &CStr) -> io::Result<()> { - unsafe { ret(syscall!(__NR_lremovexattr, path, name)) } + unsafe { ret(syscall_readonly!(__NR_lremovexattr, path, name)) } } #[inline] pub(crate) fn fremovexattr(fd: BorrowedFd<'_>, name: &CStr) -> io::Result<()> { - unsafe { ret(syscall!(__NR_fremovexattr, fd, name)) } + unsafe { ret(syscall_readonly!(__NR_fremovexattr, fd, name)) } +} + +#[inline] +pub(crate) fn ioctl_blksszget(fd: BorrowedFd) -> io::Result<u32> { + let mut result = MaybeUninit::<c::c_uint>::uninit(); + unsafe { + ret(syscall!(__NR_ioctl, fd, c_uint(BLKSSZGET), &mut result))?; + Ok(result.assume_init() as u32) + } +} + +#[inline] +pub(crate) fn ioctl_blkpbszget(fd: BorrowedFd) -> io::Result<u32> { + let mut result = MaybeUninit::<c::c_uint>::uninit(); + unsafe { + ret(syscall!(__NR_ioctl, fd, c_uint(BLKPBSZGET), &mut result))?; + Ok(result.assume_init() as u32) + } +} + +#[inline] +pub(crate) fn ioctl_ficlone(fd: BorrowedFd<'_>, src_fd: BorrowedFd<'_>) -> io::Result<()> { + unsafe { ret(syscall_readonly!(__NR_ioctl, fd, c_uint(FICLONE), src_fd)) } +} + +#[inline] +pub(crate) fn ext4_ioc_resize_fs(fd: BorrowedFd<'_>, blocks: u64) -> io::Result<()> { + unsafe { + ret(syscall_readonly!( + __NR_ioctl, + fd, + c_uint(EXT4_IOC_RESIZE_FS), + by_ref(&blocks) + )) + } } |