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vfs: fix directory renaming by renaming dirs cached in memory 

Before this change, if a directory was renamed and it or any children
had virtual entries in it they weren't flushed.

The consequence of this was that the directory path got out sync with
the actual position of the directory in the tree, leading to listings
of the old directory rather than the new one.

The fix renames any directories remaining after the ForgetAll to have
the correct path which fixes the problem.

See: https://forum.rclone.org/t/after-a-directory-renmane-using-mv-files-are-not-visible-any-longer/22797
This commit is contained in:
Nick Craig-Wood 2021-03-17 15:01:35 +00:00
parent a4c4ddf052
commit b47d6001a9
1 changed files with 28 additions and 0 deletions
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28
vfs/dir.go
View File

@ -312,12 +312,35 @@ func (d *Dir) _age(when time.Time) (age time.Duration, stale bool) {
return
}
// renameTree renames the directories under this directory
//
// path should be the desired path
func (d *Dir) renameTree(dirPath string) {
d.mu.Lock()
defer d.mu.Unlock()
// Make sure the path is correct for each node
if d.path != dirPath {
fs.Debugf(d.path, "Renaming to %q", dirPath)
d.path = dirPath
d.entry = fs.NewDirCopy(context.TODO(), d.entry).SetRemote(dirPath)
}
// Do the same to any child directories
for leaf, node := range d.items {
if dir, ok := node.(*Dir); ok {
dir.renameTree(path.Join(dirPath, leaf))
}
}
}
// rename should be called after the directory is renamed
//
// Reset the directory to new state, discarding all the objects and
// reading everything again
func (d *Dir) rename(newParent *Dir, fsDir fs.Directory) {
d.ForgetAll()
d.modTimeMu.Lock()
d.modTime = fsDir.ModTime(context.TODO())
d.modTimeMu.Unlock()
@ -330,6 +353,9 @@ func (d *Dir) rename(newParent *Dir, fsDir fs.Directory) {
d.read = time.Time{}
d.mu.Unlock()
// Rename any remaining items in the tree that we couldn't forget
d.renameTree(d.path)
// Rename in the cache
if d.vfs.cache != nil && d.vfs.cache.DirExists(oldPath) {
if err := d.vfs.cache.DirRename(oldPath, newPath); err != nil {
@ -930,6 +956,7 @@ func (d *Dir) RemoveName(name string) error {
// Rename the file
func (d *Dir) Rename(oldName, newName string, destDir *Dir) error {
// fs.Debugf(d, "BEFORE\n%s", d.dump())
if d.vfs.Opt.ReadOnly {
return EROFS
}
@ -996,6 +1023,7 @@ func (d *Dir) Rename(oldName, newName string, destDir *Dir) error {
destDir.addObject(oldNode)
// fs.Debugf(newPath, "Dir.Rename renamed from %q", oldPath)
// fs.Debugf(d, "AFTER\n%s", d.dump())
return nil
}