diff options
Diffstat (limited to 'pkg/sentry/fs/mount_overlay.go')
| -rw-r--r-- | pkg/sentry/fs/mount_overlay.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/pkg/sentry/fs/mount_overlay.go b/pkg/sentry/fs/mount_overlay.go index bc0ce7adc..4fcdd6c01 100644 --- a/pkg/sentry/fs/mount_overlay.go +++ b/pkg/sentry/fs/mount_overlay.go @@ -81,6 +81,17 @@ func (o *overlayMountSourceOperations) Keep(dirent *Dirent) bool { return o.upper.Keep(dirent) } +// CacheReaddir implements MountSourceOperations.CacheReaddir for an overlay by +// performing the logical AND of the upper and lower filesystems' CacheReaddir +// methods. +// +// N.B. This is fs-global instead of inode-specific because it must always +// return the same value. If it was inode-specific, we couldn't guarantee that +// property across copy up. +func (o *overlayMountSourceOperations) CacheReaddir() bool { + return o.lower.CacheReaddir() && o.upper.CacheReaddir() +} + // ResetInodeMappings propagates the call to both upper and lower MountSource. func (o *overlayMountSourceOperations) ResetInodeMappings() { o.upper.ResetInodeMappings() |