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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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16
virtio-devices/src/vhost_user/blk.rs
View File

@@ -9,8 +9,6 @@ use super::{Error, Result};
use crate::VirtioInterrupt;
use block_util::VirtioBlockConfig;
use libc::EFD_NONBLOCK;
use std::cmp;
use std::io::Write;
use std::mem;
use std::os::unix::io::AsRawFd;
use std::result;
@@ -188,18 +186,8 @@ impl VirtioDevice for Blk {
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 write_config(&mut self, offset: u64, data: &[u8]) {

16
virtio-devices/src/vhost_user/fs.rs
View File

@@ -10,9 +10,7 @@ use crate::{
VirtioInterrupt, VirtioSharedMemoryList, VIRTIO_F_VERSION_1,
};
use libc::{self, c_void, off64_t, pread64, pwrite64, EFD_NONBLOCK};
use std::cmp;
use std::io;
use std::io::Write;
use std::os::unix::io::{AsRawFd, RawFd};
use std::result;
use std::sync::atomic::{AtomicBool, Ordering};
@@ -407,18 +405,8 @@ impl VirtioDevice for Fs {
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(

16
virtio-devices/src/vhost_user/net.rs
View File

@@ -13,8 +13,6 @@ use super::{Error, Result};
use crate::VirtioInterrupt;
use libc::EFD_NONBLOCK;
use net_util::MacAddr;
use std::cmp;
use std::io::Write;
use std::os::unix::io::AsRawFd;
use std::result;
use std::sync::atomic::{AtomicBool, Ordering};
@@ -194,18 +192,8 @@ 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(