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) } // NFSClientRPCStats retrieves NFS client RPC statistics. func (fs FS) NFSClientRPCStats() (*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) }