containerd/fs/hardlink_unix.go

34 lines
513 B
Go

// +build !windows
package fs
import (
"errors"
"os"
"syscall"
)
func getHardLink(name string, fi os.FileInfo, inodes map[uint64]string) (string, error) {
if fi.IsDir() {
return "", nil
}
s, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return "", errors.New("unsupported stat type")
}
// If inode is not hardlinked, no reason to lookup or save inode
if s.Nlink == 1 {
return "", nil
}
inode := uint64(s.Ino)
path, ok := inodes[inode]
if !ok {
inodes[inode] = name
}
return path, nil
}