[VOL-4290] Voltha go library updates for gRPC migration
Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/github.com/prometheus/procfs/swaps.go b/vendor/github.com/prometheus/procfs/swaps.go
new file mode 100644
index 0000000..15edc22
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/swaps.go
@@ -0,0 +1,89 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+ "bufio"
+ "bytes"
+ "fmt"
+ "strconv"
+ "strings"
+
+ "github.com/prometheus/procfs/internal/util"
+)
+
+// Swap represents an entry in /proc/swaps.
+type Swap struct {
+ Filename string
+ Type string
+ Size int
+ Used int
+ Priority int
+}
+
+// Swaps returns a slice of all configured swap devices on the system.
+func (fs FS) Swaps() ([]*Swap, error) {
+ data, err := util.ReadFileNoStat(fs.proc.Path("swaps"))
+ if err != nil {
+ return nil, err
+ }
+ return parseSwaps(data)
+}
+
+func parseSwaps(info []byte) ([]*Swap, error) {
+ swaps := []*Swap{}
+ scanner := bufio.NewScanner(bytes.NewReader(info))
+ scanner.Scan() // ignore header line
+ for scanner.Scan() {
+ swapString := scanner.Text()
+ parsedSwap, err := parseSwapString(swapString)
+ if err != nil {
+ return nil, err
+ }
+ swaps = append(swaps, parsedSwap)
+ }
+
+ err := scanner.Err()
+ return swaps, err
+}
+
+func parseSwapString(swapString string) (*Swap, error) {
+ var err error
+
+ swapFields := strings.Fields(swapString)
+ swapLength := len(swapFields)
+ if swapLength < 5 {
+ return nil, fmt.Errorf("too few fields in swap string: %s", swapString)
+ }
+
+ swap := &Swap{
+ Filename: swapFields[0],
+ Type: swapFields[1],
+ }
+
+ swap.Size, err = strconv.Atoi(swapFields[2])
+ if err != nil {
+ return nil, fmt.Errorf("invalid swap size: %s", swapFields[2])
+ }
+ swap.Used, err = strconv.Atoi(swapFields[3])
+ if err != nil {
+ return nil, fmt.Errorf("invalid swap used: %s", swapFields[3])
+ }
+ swap.Priority, err = strconv.Atoi(swapFields[4])
+ if err != nil {
+ return nil, fmt.Errorf("invalid swap priority: %s", swapFields[4])
+ }
+
+ return swap, nil
+}