tools: smart: only throw error for smartctl fatal errors

only bit 0-2 are fatal errors, bit 3-7 are used to indicate
some drive conditions. for details see the manpage of smartctl(8)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
 [ Thomas: resolved merge-conflict due to moved run_command ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/tools/disks/smart.rs

@@ -91,7 +91,9 @@ pub fn get_smart_data(
     };
     command.arg(disk_path);
 
-    let output = pbs_tools::run_command(command, None)?;
+    let output = pbs_tools::run_command(command, Some(|exitcode|
+        (exitcode & 0b0111) == 0 // only bits 0-2 are fatal errors
+    ))?;
 
     let output: serde_json::Value = output.parse()?;