mirror of https://github.com/k3d-io/k3d
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
2.8 KiB
120 lines
2.8 KiB
// +build !windows
|
|
|
|
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package fs
|
|
|
|
import (
|
|
"context"
|
|
"os"
|
|
"path/filepath"
|
|
"syscall"
|
|
)
|
|
|
|
// blocksUnitSize is the unit used by `st_blocks` in `stat` in bytes.
|
|
// See https://man7.org/linux/man-pages/man2/stat.2.html
|
|
// st_blocks
|
|
// This field indicates the number of blocks allocated to the
|
|
// file, in 512-byte units. (This may be smaller than
|
|
// st_size/512 when the file has holes.)
|
|
const blocksUnitSize = 512
|
|
|
|
type inode struct {
|
|
// TODO(stevvooe): Can probably reduce memory usage by not tracking
|
|
// device, but we can leave this right for now.
|
|
dev, ino uint64
|
|
}
|
|
|
|
func newInode(stat *syscall.Stat_t) inode {
|
|
return inode{
|
|
// Dev is uint32 on darwin/bsd, uint64 on linux/solaris/freebsd
|
|
dev: uint64(stat.Dev), // nolint: unconvert
|
|
// Ino is uint32 on bsd, uint64 on darwin/linux/solaris/freebsd
|
|
ino: uint64(stat.Ino), // nolint: unconvert
|
|
}
|
|
}
|
|
|
|
func diskUsage(ctx context.Context, roots ...string) (Usage, error) {
|
|
|
|
var (
|
|
size int64
|
|
inodes = map[inode]struct{}{} // expensive!
|
|
)
|
|
|
|
for _, root := range roots {
|
|
if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
}
|
|
|
|
stat := fi.Sys().(*syscall.Stat_t)
|
|
inoKey := newInode(stat)
|
|
if _, ok := inodes[inoKey]; !ok {
|
|
inodes[inoKey] = struct{}{}
|
|
size += stat.Blocks * blocksUnitSize
|
|
}
|
|
|
|
return nil
|
|
}); err != nil {
|
|
return Usage{}, err
|
|
}
|
|
}
|
|
|
|
return Usage{
|
|
Inodes: int64(len(inodes)),
|
|
Size: size,
|
|
}, nil
|
|
}
|
|
|
|
func diffUsage(ctx context.Context, a, b string) (Usage, error) {
|
|
var (
|
|
size int64
|
|
inodes = map[inode]struct{}{} // expensive!
|
|
)
|
|
|
|
if err := Changes(ctx, a, b, func(kind ChangeKind, _ string, fi os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if kind == ChangeKindAdd || kind == ChangeKindModify {
|
|
stat := fi.Sys().(*syscall.Stat_t)
|
|
inoKey := newInode(stat)
|
|
if _, ok := inodes[inoKey]; !ok {
|
|
inodes[inoKey] = struct{}{}
|
|
size += stat.Blocks * blocksUnitSize
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
return Usage{}, err
|
|
}
|
|
|
|
return Usage{
|
|
Inodes: int64(len(inodes)),
|
|
Size: size,
|
|
}, nil
|
|
}
|
|
|