Update swagger to 0.20.1 (#8010)

* update swagger to 0.20.1

* fiw swagger version for validate

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

@@ -54,7 +54,7 @@ func NewProc(pid int) (Proc, error) {
 	if err != nil {
 		return Proc{}, err
 	}
-	return fs.NewProc(pid)
+	return fs.Proc(pid)
 }
 
 // AllProcs returns a list of all currently available processes under /proc.
@@ -76,11 +76,18 @@ func (fs FS) Self() (Proc, error) {
 	if err != nil {
 		return Proc{}, err
 	}
-	return fs.NewProc(pid)
+	return fs.Proc(pid)
 }
 
 // NewProc returns a process for the given pid.
+//
+// Deprecated: use fs.Proc() instead
 func (fs FS) NewProc(pid int) (Proc, error) {
+	return fs.Proc(pid)
+}
+
+// Proc returns a process for the given pid.
+func (fs FS) Proc(pid int) (Proc, error) {
 	if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil {
 		return Proc{}, err
 	}
@@ -240,6 +247,20 @@ func (p Proc) MountStats() ([]*Mount, error) {
 	return parseMountStats(f)
 }
 
+// MountInfo retrieves mount information for mount points in a
+// process's namespace.
+// It supplies information missing in `/proc/self/mounts` and
+// fixes various other problems with that file too.
+func (p Proc) MountInfo() ([]*MountInfo, error) {
+	f, err := os.Open(p.path("mountinfo"))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return parseMountInfo(f)
+}
+
 func (p Proc) fileDescriptors() ([]string, error) {
 	d, err := os.Open(p.path("fd"))
 	if err != nil {
@@ -258,3 +279,33 @@ func (p Proc) fileDescriptors() ([]string, error) {
 func (p Proc) path(pa ...string) string {
 	return p.fs.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
 }
+
+// FileDescriptorsInfo retrieves information about all file descriptors of
+// the process.
+func (p Proc) FileDescriptorsInfo() (ProcFDInfos, error) {
+	names, err := p.fileDescriptors()
+	if err != nil {
+		return nil, err
+	}
+
+	var fdinfos ProcFDInfos
+
+	for _, n := range names {
+		fdinfo, err := p.FDInfo(n)
+		if err != nil {
+			continue
+		}
+		fdinfos = append(fdinfos, *fdinfo)
+	}
+
+	return fdinfos, nil
+}
+
+// Schedstat returns task scheduling information for the process.
+func (p Proc) Schedstat() (ProcSchedstat, error) {
+	contents, err := ioutil.ReadFile(p.path("schedstat"))
+	if err != nil {
+		return ProcSchedstat{}, err
+	}
+	return parseProcSchedstat(string(contents))
+}