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vmm: config: Port CPU parsing to OptionParser

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-03-27 11:51:09 +00:00
parent 9e6a2825ba
commit 68203ea414
1 changed files with 13 additions and 25 deletions
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38
vmm/src/config.rs
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@ -27,10 +27,6 @@ pub const DEFAULT_QUEUE_SIZE_VUBLK: u16 = 128;
/// Errors associated with VM configuration parameters.
#[derive(Debug)]
pub enum Error {
/// Failed parsing cpus parameters.
ParseCpusParams(std::num::ParseIntError),
/// Unexpected vCPU parameter
ParseCpusUnknownParam,
/// Max is less than boot
ParseCpusMaxLowerThanBoot,
/// Failed parsing memory hotplug_method parameter.
@ -111,6 +107,8 @@ pub enum Error {
ValidateMissingKernelConfig,
/// Failed parsing generic on|off parameter.
ParseOnOff,
/// Error parsing CPU options
ParseCpus(OptionParserError),
}
pub type Result<T> = result::Result<T, Error>;
@ -288,28 +286,18 @@ pub struct CpusConfig {
impl CpusConfig {
pub fn parse(cpus: &str) -> Result<Self> {
// Split the parameters based on the comma delimiter
let params_list: Vec<&str> = cpus.split(',').collect();
let mut parser = OptionParser::new();
parser.add("boot").add("max");
parser.parse(cpus).map_err(Error::ParseCpus)?;
let mut boot_str: &str = "";
let mut max_str: &str = "";
for param in params_list.iter() {
if param.starts_with("boot=") {
boot_str = &param["boot=".len()..];
} else if param.starts_with("max=") {
max_str = &param["max=".len()..];
} else {
return Err(Error::ParseCpusUnknownParam);
}
}
let boot_vcpus: u8 = boot_str.parse().map_err(Error::ParseCpusParams)?;
let max_vcpus = if max_str != "" {
max_str.parse().map_err(Error::ParseCpusParams)?
} else {
boot_vcpus
};
let boot_vcpus: u8 = parser
.convert("boot")
.map_err(Error::ParseCpus)?
.unwrap_or(DEFAULT_VCPUS);
let max_vcpus: u8 = parser
.convert("max")
.map_err(Error::ParseCpus)?
.unwrap_or(boot_vcpus);
if max_vcpus < boot_vcpus {
return Err(Error::ParseCpusMaxLowerThanBoot);