vmm: Add 'memory_zones' option to NumaConfig

This new option provides a new way to describe the memory associated
with a NUMA node. This is the first step before we can remove the
'guest_numa_node' option from the --memory-zone parameter.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

option_parser/src/lib.rs

@@ -248,3 +248,19 @@ impl FromStr for TupleTwoIntegers {
         Ok(TupleTwoIntegers(list))
     }
 }
+
+pub struct StringList(pub Vec<String>);
+
+pub enum StringListParseError {
+    InvalidValue(String),
+}
+
+impl FromStr for StringList {
+    type Err = StringListParseError;
+
+    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
+        let string_list: Vec<String> = s.trim().split(':').map(|e| e.to_owned()).collect();
+
+        Ok(StringList(string_list))
+    }
+}

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -754,6 +754,10 @@ components:
           type: array
           items:
             $ref: '#/components/schemas/NumaDistance'
+        memory_zones:
+          type: array
+          items:
+            type: string
 
     VmResize:
       type: object

vmm/src/config.rs

@@ -6,7 +6,7 @@
 use clap::ArgMatches;
 use net_util::MacAddr;
 use option_parser::{
-    ByteSized, IntegerList, OptionParser, OptionParserError, Toggle, TupleTwoIntegers,
+    ByteSized, IntegerList, OptionParser, OptionParserError, StringList, Toggle, TupleTwoIntegers,
 };
 use std::convert::From;
 use std::fmt;
@@ -1235,14 +1235,21 @@ pub struct NumaConfig {
     pub cpus: Option<Vec<u8>>,
     #[serde(default)]
     pub distances: Option<Vec<NumaDistance>>,
+    #[serde(default)]
+    pub memory_zones: Option<Vec<String>>,
 }
 
 impl NumaConfig {
     pub const SYNTAX: &'static str = "Settings related to a given NUMA node \
-        \"id=<node_id>,cpus=<cpus_id>,distances=<list_of_distances_to_destination_nodes>\"";
+        \"id=<node_id>,cpus=<cpus_id>,distances=<list_of_distances_to_destination_nodes>,\
+        memory_zones=<list_of_memory_zones>\"";
     pub fn parse(numa: &str) -> Result<Self> {
         let mut parser = OptionParser::new();
-        parser.add("id").add("cpus").add("distances");
+        parser
+            .add("id")
+            .add("cpus")
+            .add("distances")
+            .add("memory_zones");
         parser.parse(numa).map_err(Error::ParseNuma)?;
 
         let id = parser
@@ -1264,11 +1271,16 @@ impl NumaConfig {
                     })
                     .collect()
             });
+        let memory_zones = parser
+            .convert::<StringList>("memory_zones")
+            .map_err(Error::ParseNuma)?
+            .map(|v| v.0);
 
         Ok(NumaConfig {
             id,
             cpus,
             distances,
+            memory_zones,
         })
     }
 }