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-rw-r--r--pkg/sentry/fs/inode_operations.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkg/sentry/fs/inode_operations.go b/pkg/sentry/fs/inode_operations.go
index 5cde9d215..d6c35c2dc 100644
--- a/pkg/sentry/fs/inode_operations.go
+++ b/pkg/sentry/fs/inode_operations.go
@@ -221,6 +221,8 @@ type InodeOperations interface {
// sys_ftruncate.
//
// Implementations need not check that length >= 0.
+ //
+ // Truncate must only be called on regular files.
Truncate(ctx context.Context, inode *Inode, size int64) error
// Allocate allows the caller to reserve disk space for the inode.