1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
//! Filesystem-oriented `ioctl` functions.
#![allow(unsafe_code)]
#[cfg(linux_kernel)]
use {
crate::fd::AsFd,
crate::{backend, io, ioctl},
backend::c,
};
#[cfg(all(linux_kernel, not(any(target_arch = "sparc", target_arch = "sparc64"))))]
use crate::fd::{AsRawFd, BorrowedFd};
/// `ioctl(fd, BLKSSZGET)`—Returns the logical block size of a block device.
///
/// This is mentioned in the [Linux `openat` manual page].
///
/// [Linux `openat` manual page]: https://man7.org/linux/man-pages/man2/openat.2.html
#[cfg(linux_kernel)]
#[inline]
#[doc(alias = "BLKSSZGET")]
pub fn ioctl_blksszget<Fd: AsFd>(fd: Fd) -> io::Result<u32> {
// SAFETY: BLZSSZGET is a getter opcode that gets a u32.
unsafe {
let ctl = ioctl::Getter::<ioctl::BadOpcode<{ c::BLKSSZGET }>, c::c_uint>::new();
ioctl::ioctl(fd, ctl)
}
}
/// `ioctl(fd, BLKPBSZGET)`—Returns the physical block size of a block device.
#[cfg(linux_kernel)]
#[inline]
#[doc(alias = "BLKPBSZGET")]
pub fn ioctl_blkpbszget<Fd: AsFd>(fd: Fd) -> io::Result<u32> {
// SAFETY: BLKPBSZGET is a getter opcode that gets a u32.
unsafe {
let ctl = ioctl::Getter::<ioctl::BadOpcode<{ c::BLKPBSZGET }>, c::c_uint>::new();
ioctl::ioctl(fd, ctl)
}
}
/// `ioctl(fd, FICLONE, src_fd)`—Share data between open files.
///
/// This ioctl is not available on Sparc platforms
///
/// # References
/// - [Linux]
///
/// [Linux]: https://man7.org/linux/man-pages/man2/ioctl_ficlone.2.html
#[cfg(all(linux_kernel, not(any(target_arch = "sparc", target_arch = "sparc64"))))]
#[inline]
#[doc(alias = "FICLONE")]
pub fn ioctl_ficlone<Fd: AsFd, SrcFd: AsFd>(fd: Fd, src_fd: SrcFd) -> io::Result<()> {
unsafe { ioctl::ioctl(fd, Ficlone(src_fd.as_fd())) }
}
/// `ioctl(fd, EXT4_IOC_RESIZE_FS, blocks)`—Resize ext4 filesystem on fd.
#[cfg(linux_kernel)]
#[inline]
#[doc(alias = "EXT4_IOC_RESIZE_FS")]
pub fn ext4_ioc_resize_fs<Fd: AsFd>(fd: Fd, blocks: u64) -> io::Result<()> {
// SAFETY: EXT4_IOC_RESIZE_FS is a pointer setter opcode.
unsafe {
let ctl = ioctl::Setter::<ioctl::BadOpcode<{ backend::fs::EXT4_IOC_RESIZE_FS }>, u64>::new(
blocks,
);
ioctl::ioctl(fd, ctl)
}
}
#[cfg(all(linux_kernel, not(any(target_arch = "sparc", target_arch = "sparc64"))))]
struct Ficlone<'a>(BorrowedFd<'a>);
#[cfg(all(linux_kernel, not(any(target_arch = "sparc", target_arch = "sparc64"))))]
unsafe impl ioctl::Ioctl for Ficlone<'_> {
type Output = ();
const IS_MUTATING: bool = false;
const OPCODE: ioctl::Opcode = ioctl::Opcode::old(c::FICLONE as ioctl::RawOpcode);
fn as_ptr(&mut self) -> *mut c::c_void {
self.0.as_raw_fd() as *mut c::c_void
}
unsafe fn output_from_ptr(
_: ioctl::IoctlOutput,
_: *mut c::c_void,
) -> io::Result<Self::Output> {
Ok(())
}
}
|
