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vmm: config: Port pmem option to OptionParser

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-04-02 16:00:52 +01:00
parent 233ad78b3a
commit 5ab58e743a
1 changed files with 40 additions and 32 deletions
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72
vmm/src/config.rs
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@ -39,8 +39,10 @@ pub enum Error {
ParseFsSockMissing,
/// Cannot have dax=off along with cache_size parameter.
InvalidCacheSizeWithDaxOff,
/// Failed parsing persitent memory file parameter.
ParsePmemFileParam,
/// Missing persistant memory file parameter.
ParsePmemFileMissing,
/// Missing persistant memory size parameter.
ParsePmemSizeMissing,
/// Failed parsing size parameter.
ParseSizeParam(std::num::ParseIntError),
/// Failed parsing console parameter.
@ -67,6 +69,8 @@ pub enum Error {
ParseRNG(OptionParserError),
/// Error parsing filesystem parameters
ParseFileSystem(OptionParserError),
/// Error parsing persistent memorry parameters
ParsePersistentMemory(OptionParserError),
}
pub type Result<T> = result::Result<T, Error>;
@ -849,39 +853,43 @@ impl PmemConfig {
\"file=<backing_file_path>,size=<persistent_memory_size>,iommu=on|off,\
mergeable=on|off,discard_writes=on|off,\"";
pub fn parse(pmem: &str) -> Result<Self> {
// Split the parameters based on the comma delimiter
let params_list: Vec<&str> = pmem.split(',').collect();
let mut parser = OptionParser::new();
parser
.add("size")
.add("file")
.add("mergeable")
.add("iommu")
.add("discard_writes");
parser.parse(pmem).map_err(Error::ParsePersistentMemory)?;
let mut file_str: &str = "";
let mut size_str: &str = "";
let mut iommu_str: &str = "";
let mut mergeable_str: &str = "";
let mut discard_writes_str: &str = "";
for param in params_list.iter() {
if param.starts_with("file=") {
file_str = &param[5..];
} else if param.starts_with("size=") {
size_str = &param[5..];
} else if param.starts_with("iommu=") {
iommu_str = &param[6..];
} else if param.starts_with("mergeable=") {
mergeable_str = &param[10..];
} else if param.starts_with("discard_writes=") {
discard_writes_str = &param[15..];
}
}
if file_str.is_empty() {
return Err(Error::ParsePmemFileParam);
}
let file = PathBuf::from(parser.get("file").ok_or(Error::ParsePmemFileMissing)?);
let size = parser
.convert::<ByteSized>("size")
.map_err(Error::ParseMemory)?
.ok_or(Error::ParsePmemSizeMissing)?
.0;
let mergeable = parser
.convert::<Toggle>("mergeable")
.map_err(Error::ParsePersistentMemory)?
.unwrap_or(Toggle(false))
.0;
let iommu = parser
.convert::<Toggle>("iommu")
.map_err(Error::ParsePersistentMemory)?
.unwrap_or(Toggle(false))
.0;
let discard_writes = parser
.convert::<Toggle>("discard_writes")
.map_err(Error::ParsePersistentMemory)?
.unwrap_or(Toggle(false))
.0;
Ok(PmemConfig {
file: PathBuf::from(file_str),
size: parse_size(size_str)?,
iommu: parse_on_off(iommu_str)?,
mergeable: parse_on_off(mergeable_str)?,
discard_writes: parse_on_off(discard_writes_str)?,
file,
size,
iommu,
mergeable,
discard_writes,
})
}
}