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Revert "vmm: config: Replace use of memfd_create with fd pointing to /dev/null"

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This reverts commit 46066d6ae1.

Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen 2023-04-14 15:41:22 -07:00 committed by Bo Chen
parent 2d98a16d05
commit bb0d82c365
1 changed files with 15 additions and 6 deletions
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21
vmm/src/config.rs
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@ -2138,8 +2138,6 @@ impl VmConfig {
#[cfg(test)]
mod tests {
use std::{fs::File, os::fd::AsRawFd};
use super::*;
use net_util::MacAddr;
@ -2353,6 +2351,17 @@ mod tests {
Ok(())
}
fn memfd_create(name: &std::ffi::CStr, flags: u32) -> std::result::Result<i32, std::io::Error> {
// SAFETY: FFI call with correct arguments
let res = unsafe { libc::syscall(libc::SYS_memfd_create, name.as_ptr(), flags) };
if res < 0 {
Err(std::io::Error::last_os_error())
} else {
Ok(res as i32)
}
}
#[test]
fn test_net_parsing() -> Result<()> {
// mac address is random
@ -2431,10 +2440,10 @@ mod tests {
}
);
// SAFETY: Safe as the file was just opened
let fd1 = unsafe { libc::dup(File::open("/dev/null").unwrap().as_raw_fd()) };
// SAFETY: Safe as the file was just opened
let fd2 = unsafe { libc::dup(File::open("/dev/null").unwrap().as_raw_fd()) };
let fd1 =
memfd_create(&std::ffi::CString::new("test_net_parsing_fd1").unwrap(), 0).unwrap();
let fd2 =
memfd_create(&std::ffi::CString::new("test_net_parsing_fd2").unwrap(), 0).unwrap();
assert_eq!(
&format!(