node_exporter/vendor/github.com/prometheus/procfs/fs.go
Ben Kochie f9e91156d0
Update vendoring (#801)
* Update vendor github.com/godbus/dbus@v4.1.0

* Update vendor github.com/golang/protobuf/proto

* Update vendor github.com/mdlayher/netlink/...

* Update vendor github.com/prometheus/client_golang/prometheus/...

* Update vendor github.com/prometheus/client_model/go

* Update vendor github.com/prometheus/common/...

* Update vendor github.com/prometheus/procfs/...

* Update vendor github.com/sirupsen/logrus@v1.0.4

* Update vendor golang.org/x/...

* Update vendor gopkg.in/alecthomas/kingpin.v2

* Remove obsolete vendor github.com/mdlayher/netlink/genetlink
2018-01-25 18:20:39 +01:00

70 lines
1.6 KiB
Go

package procfs
import (
"fmt"
"os"
"path"
"github.com/prometheus/procfs/nfs"
"github.com/prometheus/procfs/xfs"
)
// FS represents the pseudo-filesystem proc, which provides an interface to
// kernel data structures.
type FS string
// DefaultMountPoint is the common mount point of the proc filesystem.
const DefaultMountPoint = "/proc"
// NewFS returns a new FS mounted under the given mountPoint. It will error
// if the mount point can't be read.
func NewFS(mountPoint string) (FS, error) {
info, err := os.Stat(mountPoint)
if err != nil {
return "", fmt.Errorf("could not read %s: %s", mountPoint, err)
}
if !info.IsDir() {
return "", fmt.Errorf("mount point %s is not a directory", mountPoint)
}
return FS(mountPoint), nil
}
// Path returns the path of the given subsystem relative to the procfs root.
func (fs FS) Path(p ...string) string {
return path.Join(append([]string{string(fs)}, p...)...)
}
// XFSStats retrieves XFS filesystem runtime statistics.
func (fs FS) XFSStats() (*xfs.Stats, error) {
f, err := os.Open(fs.Path("fs/xfs/stat"))
if err != nil {
return nil, err
}
defer f.Close()
return xfs.ParseStats(f)
}
// NFSdClientRPCStats retrieves NFS daemon RPC statistics.
func (fs FS) NFSdClientRPCStats() (*nfs.ClientRPCStats, error) {
f, err := os.Open(fs.Path("net/rpc/nfs"))
if err != nil {
return nil, err
}
defer f.Close()
return nfs.ParseClientRPCStats(f)
}
// NFSdServerRPCStats retrieves NFS daemon RPC statistics.
func (fs FS) NFSdServerRPCStats() (*nfs.ServerRPCStats, error) {
f, err := os.Open(fs.Path("net/rpc/nfsd"))
if err != nil {
return nil, err
}
defer f.Close()
return nfs.ParseServerRPCStats(f)
}