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tpm: drop unused fields in BackendCmd struct

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They are never used.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2023-01-25 22:42:44 +00:00 committed by Rob Bradford
parent cffde0ff65
commit 73af65f417
2 changed files with 6 additions and 18 deletions
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2
devices/src/tpm.rs
View File

@ -472,10 +472,8 @@ impl BusDevice for Tpm {
self.regs[CRB_CTRL_START as usize] |= CRB_START_INVOKE;
let mut cmd = BackendCmd {
locality: locality as u8,
buffer: &mut self.data_buff,
input_len: cmp::min(self.data_buff_len, TPM_CRB_BUFFER_MAX),
selftest_done: false,
};
let _ = self.emulator.deliver_request(&mut cmd);

14
tpm/src/emulator.rs
View File

@ -62,12 +62,10 @@ pub enum Error {
type Result<T> = anyhow::Result<T, Error>;
pub struct BackendCmd<'a> {
pub locality: u8,
// This buffer is used for both input and output.
// When used for input, the length of the data is input_len.
pub buffer: &'a mut [u8],
pub input_len: usize,
pub selftest_done: bool,
}
pub struct Emulator {
@ -285,13 +283,10 @@ impl Emulator {
/// Function to write to data socket and read the response from it
pub fn deliver_request(&mut self, cmd: &mut BackendCmd) -> Result<()> {
let isselftest: bool;
// SAFETY: type "sockaddr_storage" is valid with an all-zero byte-pattern value
let mut addr: sockaddr_storage = unsafe { mem::zeroed() };
let mut len = mem::size_of::<sockaddr_storage>() as socklen_t;
cmd.selftest_done = false;
isselftest = is_selftest(&cmd.buffer[0..cmd.input_len]);
let isselftest = is_selftest(&cmd.buffer[0..cmd.input_len]);
debug!(
"Send cmd: {:02X?} of len {:?} on data_ioc ",
@ -347,17 +342,12 @@ impl Emulator {
cmd.buffer, output_len, isselftest
);
if isselftest {
if output_len < 10 {
if isselftest && output_len < 10 {
return Err(Error::SelfTest(anyhow!(
"Self test response should have 10 bytes. Only {:?} returned",
output_len
)));
}
let mut errcode: [u8; 4] = [0; 4];
errcode.copy_from_slice(&cmd.buffer[6..6 + 4]);
cmd.selftest_done = u32::from_ne_bytes(errcode).to_be() == 0;
}
Ok(())
}