[disk][linux] Fix for diskusage Ceph mount

disk/disk_unix.go

@@ -27,28 +27,29 @@ func UsageWithContext(ctx context.Context, path string) (*UsageStat, error) {
 		InodesFree:  (uint64(stat.Ffree)),
 	}
 
+	ret.Used = (uint64(stat.Blocks) - uint64(stat.Bfree)) * uint64(bsize)
+
+	if (ret.Used + ret.Free) == 0 {
+		ret.UsedPercent = 0
+	} else {
+		// We don't use ret.Total to calculate percent.
+		// see https://github.com/shirou/gopsutil/issues/562
+		ret.UsedPercent = (float64(ret.Used) / float64(ret.Used+ret.Free)) * 100.0
+	}
+
 	// if could not get InodesTotal, return empty
 	if ret.InodesTotal < ret.InodesFree {
 		return ret, nil
 	}
 
 	ret.InodesUsed = (ret.InodesTotal - ret.InodesFree)
-	ret.Used = (uint64(stat.Blocks) - uint64(stat.Bfree)) * uint64(bsize)
 
 	if ret.InodesTotal == 0 {
 		ret.InodesUsedPercent = 0
 	} else {
 		ret.InodesUsedPercent = (float64(ret.InodesUsed) / float64(ret.InodesTotal)) * 100.0
 	}
 
-	if (ret.Used + ret.Free) == 0 {
-		ret.UsedPercent = 0
-	} else {
-		// We don't use ret.Total to calculate percent.
-		// see https://github.com/shirou/gopsutil/issues/562
-		ret.UsedPercent = (float64(ret.Used) / float64(ret.Used+ret.Free)) * 100.0
-	}
-
 	return ret, nil
 }
 

internal/common/common.go

@@ -114,8 +114,8 @@ func ReadLines(filename string) ([]string, error) {
 // ReadLinesOffsetN reads contents from file and splits them by new line.
 // The offset tells at which line number to start.
 // The count determines the number of lines to read (starting from offset):
-//   n >= 0: at most n lines
-//   n < 0: whole file
+// n >= 0: at most n lines
+// n < 0: whole file
 func ReadLinesOffsetN(filename string, offset uint, n int) ([]string, error) {
 	f, err := os.Open(filename)
 	if err != nil {

net/net_linux.go

@@ -161,7 +161,7 @@ var netProtocols = []string{
 // If protocols is empty then all protocols are returned, otherwise
 // just the protocols in the list are returned.
 // Available protocols:
-//   ip,icmp,icmpmsg,tcp,udp,udplite
+// [ip,icmp,icmpmsg,tcp,udp,udplite]
 func ProtoCounters(protocols []string) ([]ProtoCountersStat, error) {
 	return ProtoCountersWithContext(context.Background(), protocols)
 }