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added directory cleanup

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This commit is contained in:
ston1th 2022-03-17 21:10:23 +01:00
commit 74ab10358a
5 changed files with 87 additions and 22 deletions
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26
pkg/fs/dir.go
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@ -8,6 +8,8 @@ import (
"os"
"sync"
"time"
"github.com/go-logr/logr"
)
var NoCacheEntry = errors.New("no cache entry")
@ -42,8 +44,9 @@ func (dc *DirCache) Set(name string, dce *DirCacheEntry) {
}
type Dir struct {
f *os.File
dc *DirCache
log logr.Logger
f *os.File
dc *DirCache
}
func (f *Dir) Read(_ []byte) (int, error) {
@ -54,6 +57,19 @@ func (f *Dir) Seek(_ int64, _ int) (int64, error) {
return 0, io.EOF
}
func readDir(f *os.File) (fi []os.FileInfo, err error) {
ent, err := f.ReadDir(0)
if err != nil {
return
}
fi = make([]os.FileInfo, len(ent))
for j, e := range ent {
i, _ := e.Info()
fi[j] = i
}
return
}
func (f *Dir) Readdir(_ int) (fi []os.FileInfo, err error) {
i, err := f.Stat()
if err != nil {
@ -61,13 +77,17 @@ func (f *Dir) Readdir(_ int) (fi []os.FileInfo, err error) {
}
name := f.f.Name()
dce, err := f.dc.Get(name)
log := f.log
if err == NoCacheEntry || i.ModTime().After(dce.mtime) {
fi, err = f.f.Readdir(0)
log.V(3).Info("cache miss")
fi, err = readDir(f.f)
if err != nil {
return
}
dce = &DirCacheEntry{i.ModTime(), fi}
f.dc.Set(name, dce)
} else {
log.V(3).Info("cache hit")
}
fi = dce.fi
return