package fs

// A StatFS is a file system with a Stat method.
type StatFS interface {
	FS

	// Stat returns a FileInfo describing the file.
	// If there is an error, it should be of type *PathError.
	Stat(name string) (FileInfo, error)
}

// Stat returns a [FileInfo] describing the named file from the file system.
//
// If fs implements [StatFS], Stat calls fs.Stat.

limitations under the License.
*/

package volume_test

import (
	"golang.org/x/sys/unix"
)

func getExpectedBlockSize(path string) int64 {
	statfs := &unix.Statfs_t{}
	err := unix.Statfs(path, statfs)
	if err != nil {
		return 0
	}

	return int64(statfs.Bsize)

//sys	Lstat(path string, stat *Stat_t) (err error)
//sys	ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) = SYS_ptrace
//sys	Stat(path string, stat *Stat_t) (err error)

//sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
//sys	ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) = SYS_ptrace
//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64

import (
	"errors"
	"fmt"
	"syscall"
)

// GetInfo returns total and free bytes available in a directory, e.g. `/`.
func GetInfo(path string, _ bool) (info Info, err error) {
	s := syscall.Statfs_t{}
	err = syscall.Statfs(path, &s)
	if err != nil {
		return Info{}, err
	}
	reservedBlocks := s.Bfree - uint64(s.Bavail)
	info = Info{
		Total:  uint64(s.Bsize) * (s.Blocks - reservedBlocks),
		Free:   uint64(s.Bsize) * uint64(s.Bavail),

import (
	"errors"
	"fmt"
	"syscall"
)

// GetInfo returns total and free bytes available in a directory, e.g. `/`.
func GetInfo(path string, _ bool) (info Info, err error) {
	s := syscall.Statfs_t{}
	err = syscall.Statfs(path, &s)
	if err != nil {
		return Info{}, err
	}
	reservedBlocks := s.Bfree - s.Bavail
	info = Info{
		Total:  uint64(s.Bsize) * (s.Blocks - reservedBlocks),
		Free:   uint64(s.Bsize) * s.Bavail,

	SYS_QUOTACTL               = 148 // { int quotactl(char *path, int cmd, int uid, caddr_t arg); }
	SYS_STATFS                 = 157 // { int statfs(char *path, struct statfs *buf); }
	SYS_FSTATFS                = 158 // { int fstatfs(int fd, struct statfs *buf); }
	SYS_GETFH                  = 161 // { int getfh(char *fname, struct fhandle *fhp); }
	SYS_SYSARCH                = 165 // { int sysarch(int op, char *parms); }

import (
	"errors"
	"fmt"
	"syscall"
)

// GetInfo returns total and free bytes available in a directory, e.g. `/`.
func GetInfo(path string, _ bool) (info Info, err error) {
	s := syscall.Statfs_t{}
	err = syscall.Statfs(path, &s)
	if err != nil {
		return Info{}, err
	}
	reservedBlocks := uint64(s.F_bfree) - uint64(s.F_bavail)
	info = Info{
		Total:  uint64(s.F_bsize) * (uint64(s.F_blocks) - reservedBlocks),

}

func isFilesystemOfType(mountpoint string, backingDev string, typeMagic int64) bool {
	var buf syscall.Statfs_t
	err := syscall.Statfs(mountpoint, &buf)
	if err != nil {
		klog.Warningf("Warning: Unable to statfs %s: %v", mountpoint, err)
		return false
	}
	if int64(buf.Type) != typeMagic {
		return false
	}
	if answer, _ := SupportsQuotas(mountpoint, FSQuotaAccounting); answer {

	SYS_GETFSSTAT      = 62  // { int sys_getfsstat(struct statfs *buf, size_t bufsize, int flags); }
	SYS_STATFS         = 63  // { int sys_statfs(const char *path, struct statfs *buf); }
	SYS_FSTATFS        = 64  // { int sys_fstatfs(int fd, struct statfs *buf); }
	SYS_FHSTATFS       = 65  // { int sys_fhstatfs(const fhandle_t *fhp, struct statfs *buf); }
	SYS_VFORK          = 66  // { int sys_vfork(void); }