From d37fa4e6cc6ffb2834cefeb435e37fcf80b81156 Mon Sep 17 00:00:00 2001
From: zharkovstas <zharkovstas@skbkontur.ru>
Date: Tue, 19 Mar 2024 11:24:31 +0500
Subject: [PATCH] fix: do not log warnings about disabled net ifaces

---
 CHANGELOG.md                                              | 4 ++++
 .../Host/NetworkUtilizationCollector_Linux.cs             | 8 +++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7f634a..7b8e275 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.3.21 (08-04-2024):
+
+Do not log warnings about disabled network interfaces on newer Linux kernels.
+
 ## 0.3.20 (22-09-2023):
 
 Return back changes from 0.3.18 using RuntimeDetector to fix "Overlapped I/O operation is in progress" exception for framework 4.7.2/4.8.
diff --git a/Vostok.Metrics.System/Host/NetworkUtilizationCollector_Linux.cs b/Vostok.Metrics.System/Host/NetworkUtilizationCollector_Linux.cs
index d0a2ef5..9112752 100644
--- a/Vostok.Metrics.System/Host/NetworkUtilizationCollector_Linux.cs
+++ b/Vostok.Metrics.System/Host/NetworkUtilizationCollector_Linux.cs
@@ -145,7 +145,7 @@ NetworkUsage CreateNetworkUsage(string interfaceName, long receivedBytes, long s
                 }
 
                 // NOTE: See https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-net for details.
-                // NOTE: This value equals -1 if interface is disabled, so we will filter this values out later.
+                // NOTE: This value equals -1 if interface is disabled on older kernels, so we will filter this values out later.
                 foreach (var networkUsage in networkInterfacesUsage.Values)
                 {
                     if (TryReadSpeed(networkUsage.InterfaceName, out var result) && int.TryParse(result, out var speed))
@@ -235,6 +235,12 @@ private static bool TryReadSpeed(string interfaceName, out string result)
                 result = File.ReadAllText(path);
                 return true;
             }
+            // NOTE: Disabled interfaces give this error on newer kernels.
+            catch (IOException ioError) when (ioError.Message.StartsWith("Invalid argument"))
+            {
+                result = null;
+                return false;
+            }
             catch (Exception error)
             {
                 // NOTE: We expect teaming interface to not be able to read speed directly.