Add the slave-only instance configuration option to statime-linux

docs/man/statime.toml.5.md

@@ -32,6 +32,9 @@ will be indicated by each configuration setting shown.
 `sdo-id` = *u12* (**0**)
 :   The "source domain identity" of this PTP instance. Together with the `domain` it identifies a domain.
 
+`slave-only` = *bool* (**false**)
+:   Forbids this instance to ever become a master on any port.
+
 `priority1` = *priority* (**128**)
 :   A tie breaker for the best master clock algorithm in the range `0..256`. `0` being the highest priority and `255` the lowest.
 

docs/precompiled/man/statime.toml.5

@@ -33,6 +33,9 @@ domain.
 The \[lq]source domain identity\[rq] of this PTP instance.
 Together with the \f[CR]domain\f[R] it identifies a domain.
 .TP
+\f[CR]slave\-only\f[R] = \f[I]bool\f[R] (\f[B]false\f[R])
+Forbids this instance to ever become a master on any port.
+.TP
 \f[CR]priority1\f[R] = \f[I]priority\f[R] (\f[B]128\f[R])
 A tie breaker for the best master clock algorithm in the range
 \f[CR]0..256\f[R].

statime-linux/src/config/mod.rs

@@ -24,6 +24,8 @@ pub struct Config {
     pub sdo_id: u16,
     #[serde(default = "default_domain")]
     pub domain: u8,
+    #[serde(default = "default_slave_only")]
+    pub slave_only: bool,
     #[serde(default, deserialize_with = "deserialize_clock_identity")]
     pub identity: Option<ClockIdentity>,
     #[serde(default = "default_priority1")]
@@ -190,6 +192,10 @@ fn default_sdo_id() -> u16 {
     0x000
 }
 
+fn default_slave_only() -> bool {
+    false
+}
+
 fn default_announce_interval() -> i8 {
     1
 }
@@ -281,6 +287,7 @@ interface = "enp0s31f6"
             loglevel: LogLevel::Info,
             sdo_id: 0x000,
             domain: 0,
+            slave_only: false,
             identity: None,
             priority1: 128,
             priority2: 128,

statime-linux/src/main.rs

@@ -268,7 +268,7 @@ async fn actual_main() {
         priority_1: config.priority1,
         priority_2: config.priority2,
         domain_number: config.domain,
-        slave_only: false,
+        slave_only: config.slave_only,
         sdo_id: SdoId::try_from(config.sdo_id).expect("sdo-id should be between 0 and 4095"),
         path_trace: config.path_trace,
     };