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it: map keymap with MAP_PRIVATE

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This commit is contained in:
Julian Orth 2024-11-28 10:55:05 +01:00
parent 723608ce77
commit bfe76e101b
3 changed files with 25 additions and 3 deletions
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24
src/clientmem.rs
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@ -53,6 +53,28 @@ impl ClientMem {
read_only: bool,
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
) -> Result<Self, ClientMemError> {
Self::new2(fd, len, read_only, client, cpu, c::MAP_SHARED)
}
#[cfg_attr(not(feature = "it"), expect(dead_code))]
pub fn new_private(
fd: &Rc<OwnedFd>,
len: usize,
read_only: bool,
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
) -> Result<Self, ClientMemError> {
Self::new2(fd, len, read_only, client, cpu, c::MAP_PRIVATE)
}
fn new2(
fd: &Rc<OwnedFd>,
len: usize,
read_only: bool,
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
flags: c::c_int,
) -> Result<Self, ClientMemError> {
let mut sigbus_impossible = false;
if let Ok(seals) = uapi::fcntl_get_seals(fd.raw()) {
@ -79,7 +101,7 @@ impl ClientMem {
false => c::PROT_READ | c::PROT_WRITE,
};
unsafe {
let data = c::mmap64(ptr::null_mut(), len, prot, c::MAP_SHARED, fd.raw(), 0);
let data = c::mmap64(ptr::null_mut(), len, prot, flags, fd.raw(), 0);
if data == c::MAP_FAILED {
return Err(ClientMemError::MmapFailed(uapi::Errno::default().into()));
}