TUN-8456: Update quic-go to 0.45 and collect mtu and congestion control metrics

vendor/github.com/prometheus/procfs/proc_fdinfo.go

@@ -26,6 +26,7 @@ var (
 	rPos          = regexp.MustCompile(`^pos:\s+(\d+)$`)
 	rFlags        = regexp.MustCompile(`^flags:\s+(\d+)$`)
 	rMntID        = regexp.MustCompile(`^mnt_id:\s+(\d+)$`)
+	rIno          = regexp.MustCompile(`^ino:\s+(\d+)$`)
 	rInotify      = regexp.MustCompile(`^inotify`)
 	rInotifyParts = regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)(?:\s+mask:([0-9a-f]+))?`)
 )
@@ -40,6 +41,8 @@ type ProcFDInfo struct {
 	Flags string
 	// Mount point ID
 	MntID string
+	// Inode number
+	Ino string
 	// List of inotify lines (structured) in the fdinfo file (kernel 3.8+ only)
 	InotifyInfos []InotifyInfo
 }
@@ -51,7 +54,7 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 		return nil, err
 	}
 
-	var text, pos, flags, mntid string
+	var text, pos, flags, mntid, ino string
 	var inotify []InotifyInfo
 
 	scanner := bufio.NewScanner(bytes.NewReader(data))
@@ -63,6 +66,8 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 			flags = rFlags.FindStringSubmatch(text)[1]
 		} else if rMntID.MatchString(text) {
 			mntid = rMntID.FindStringSubmatch(text)[1]
+		} else if rIno.MatchString(text) {
+			ino = rIno.FindStringSubmatch(text)[1]
 		} else if rInotify.MatchString(text) {
 			newInotify, err := parseInotifyInfo(text)
 			if err != nil {
@@ -77,6 +82,7 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 		Pos:          pos,
 		Flags:        flags,
 		MntID:        mntid,
+		Ino:          ino,
 		InotifyInfos: inotify,
 	}
 
@@ -111,7 +117,7 @@ func parseInotifyInfo(line string) (*InotifyInfo, error) {
 		}
 		return i, nil
 	}
-	return nil, fmt.Errorf("invalid inode entry: %q", line)
+	return nil, fmt.Errorf("%w: invalid inode entry: %q", ErrFileParse, line)
 }
 
 // ProcFDInfos represents a list of ProcFDInfo structs.