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virtio-devices: Port devices over to new read_config_from_slice() helper

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Using this helper removes lots of duplicated code across the devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2020-07-16 10:34:51 +01:00
committed by Sebastien Boeuf
parent d262540857
commit 751a302050
10 changed files with 26 additions and 142 deletions
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17
virtio-devices/src/net.rs
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@@ -20,10 +20,9 @@ use net_util::{
open_tap, MacAddr, NetCounters, NetQueuePair, OpenTapError, RxVirtio, Tap, TxVirtio,
RX_QUEUE_EVENT, RX_TAP_EVENT, TX_QUEUE_EVENT,
};
use std::cmp;
use std::collections::HashMap;
use std::fs::File;
use std::io::{self, Write};
use std::io;
use std::net::Ipv4Addr;
use std::num::Wrapping;
use std::os::unix::io::{AsRawFd, FromRawFd};
@@ -413,18 +412,8 @@ impl VirtioDevice for Net {
self.acked_features |= v;
}
fn read_config(&self, offset: u64, mut data: &mut [u8]) {
let config_slice = self.config.as_slice();
let config_len = config_slice.len() as u64;
if offset >= config_len {
error!("Failed to read config space");
return;
}
if let Some(end) = offset.checked_add(data.len() as u64) {
// This write can't fail, offset and end are checked against config_len.
data.write_all(&config_slice[offset as usize..cmp::min(end, config_len) as usize])
.unwrap();
}
fn read_config(&self, offset: u64, data: &mut [u8]) {
self.read_config_from_slice(self.config.as_slice(), offset, data);
}
fn activate(