[CacheStorage] Pad and bin opaque resource sizes.

content/browser/cache_storage/cache_storage_cache.h

Index: content/browser/cache_storage/cache_storage_cache.h
diff --git a/content/browser/cache_storage/cache_storage_cache.h b/content/browser/cache_storage/cache_storage_cache.h
index 46ea4f07fbe08ddf1be537a63624c6601e7b3619..2feda21a7daf3ed6792dbff95e7bdba0329cdad3 100644
--- a/content/browser/cache_storage/cache_storage_cache.h
+++ b/content/browser/cache_storage/cache_storage_cache.h
@@ -22,6 +22,10 @@
 #include "net/disk_cache/disk_cache.h"
 #include "storage/common/quota/quota_status_code.h"
 
+namespace crypto {
+class SymmetricKey;
+}
+
 namespace net {
 class URLRequestContextGetter;
 }
@@ -42,6 +46,7 @@ class TestCacheStorageCache;
 
 namespace proto {
 class CacheMetadata;
+class CacheResponse;
 }
 
 // Represents a ServiceWorker Cache as seen in
@@ -65,6 +70,7 @@ class CONTENT_EXPORT CacheStorageCache {
   using RequestsCallback =
       base::OnceCallback<void(CacheStorageError, std::unique_ptr<Requests>)>;
   using SizeCallback = base::OnceCallback<void(int64_t)>;
+  using SizePaddingCallback = base::OnceCallback<void(int64_t, int64_t)>;
 
   enum EntryIndex { INDEX_HEADERS = 0, INDEX_RESPONSE_BODY, INDEX_SIDE_DATA };
 
@@ -74,7 +80,8 @@ class CONTENT_EXPORT CacheStorageCache {
       CacheStorage* cache_storage,
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
       scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy,
-      base::WeakPtr<storage::BlobStorageContext> blob_context);
+      base::WeakPtr<storage::BlobStorageContext> blob_context,
+      std::unique_ptr<crypto::SymmetricKey> cache_padding_key);
   static std::unique_ptr<CacheStorageCache> CreatePersistentCache(
       const GURL& origin,
       const std::string& cache_name,
@@ -83,7 +90,14 @@ class CONTENT_EXPORT CacheStorageCache {
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
       scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy,
       base::WeakPtr<storage::BlobStorageContext> blob_context,
-      int64_t cache_size);
+      int64_t cache_size,
+      int64_t cache_padding,
+      std::unique_ptr<crypto::SymmetricKey> cache_padding_key);
+  static int64_t CalculateResponsePadding(
+      const ServiceWorkerResponse& response,
+      const crypto::SymmetricKey* padding_key,
+      int side_data_size);
+  static int32_t GetResponsePaddingVersion();
 
   // Returns ERROR_TYPE_NOT_FOUND if not found.
   void Match(std::unique_ptr<ServiceWorkerFetchRequest> request,
@@ -165,6 +179,16 @@ class CONTENT_EXPORT CacheStorageCache {
 
   int64_t cache_size() const { return cache_size_; }
 
+  int64_t cache_padding() const { return cache_padding_; }
+
+  const crypto::SymmetricKey* cache_padding_key() const {
+    return cache_padding_key_.get();
+  }
+
+  // Return the total cache size (actual size + padding). If either is unknown
+  // then CacheStorage::kSizeUnknown is returned.
+  int64_t PaddedCacheSize() const;
+
   // Set the one observer that will be notified of changes to this cache.
   // Note: Either the observer must have a lifetime longer than this instance
   // or call SetObserver(nullptr) to stop receiving notification of changes.
@@ -173,7 +197,13 @@ class CONTENT_EXPORT CacheStorageCache {
   base::WeakPtr<CacheStorageCache> AsWeakPtr();
 
  private:
-  enum class QueryCacheType { REQUESTS, REQUESTS_AND_RESPONSES, CACHE_ENTRIES };
+  // QueryCache types:
+  enum QueryCacheFlags {
+    QUERY_CACHE_REQUESTS = 0x1,
+    QUERY_CACHE_RESPONSES_WITH_BODIES = 0x2,
+    QUERY_CACHE_RESPONSES_NO_BODIES = 0x4,
+    QUERY_CACHE_ENTRIES = 0x8,
+  };
 
   // The backend progresses from uninitialized, to open, to closed, and cannot
   // reverse direction.  The open step may be skipped.
@@ -191,6 +221,7 @@ class CONTENT_EXPORT CacheStorageCache {
   struct QueryCacheContext;
   struct QueryCacheResult;
 
+  using QueryTypes = int32_t;
   using QueryCacheResults = std::vector<QueryCacheResult>;
   using QueryCacheCallback =
       base::OnceCallback<void(CacheStorageError,
@@ -208,7 +239,9 @@ class CONTENT_EXPORT CacheStorageCache {
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
       scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy,
       base::WeakPtr<storage::BlobStorageContext> blob_context,
-      int64_t cache_size);
+      int64_t cache_size,
+      int64_t cache_padding,
+      std::unique_ptr<crypto::SymmetricKey> cache_padding_key);
 
   // Runs |callback| with matching requests/response data. The data provided
   // in the QueryCacheResults depends on the |query_type|. If |query_type| is
@@ -218,7 +251,7 @@ class CONTENT_EXPORT CacheStorageCache {
   // out_blob_data_handles are valid.
   void QueryCache(std::unique_ptr<ServiceWorkerFetchRequest> request,
                   const CacheStorageCacheQueryParams& options,
-                  QueryCacheType query_type,
+                  QueryTypes query_types,
                   QueryCacheCallback callback);
   void QueryCacheDidOpenFastPath(
       std::unique_ptr<QueryCacheContext> query_cache_context,
@@ -289,17 +322,21 @@ class CONTENT_EXPORT CacheStorageCache {
       int buf_len,
       disk_cache::ScopedEntryPtr entry,
       std::unique_ptr<proto::CacheMetadata> headers);
-  void WriteSideDataDidWrite(ErrorCallback callback,
-                             disk_cache::ScopedEntryPtr entry,
-                             int expected_bytes,
-                             int rv);
+  void WriteSideDataDidWrite(
+      ErrorCallback callback,
+      disk_cache::ScopedEntryPtr entry,
+      int expected_bytes,
+      std::unique_ptr<content::proto::CacheResponse> response,
+      int side_data_size_before_write,
+      int rv);
 
   // Puts the request and response object in the cache. The response body (if
   // present) is stored in the cache, but not the request body. Returns OK on
   // success.
   void Put(const CacheStorageBatchOperation& operation, ErrorCallback callback);
   void PutImpl(std::unique_ptr<PutContext> put_context);
-  void PutDidDoomEntry(std::unique_ptr<PutContext> put_context, int rv);
+  void PutDidDeleteEntry(std::unique_ptr<PutContext> put_context,
+                         CacheStorageError error);
   void PutDidGetUsageAndQuota(std::unique_ptr<PutContext> put_context,
                               storage::QuotaStatusCode status_code,
                               int64_t usage,
@@ -356,12 +393,29 @@ class CONTENT_EXPORT CacheStorageCache {
                               std::unique_ptr<ScopedBackendPtr> backend_ptr,
                               int rv);
 
+  // Calculate the size and padding of the cache.
+  void CalculateCacheSizePadding(SizePaddingCallback callback);
+  void CalculateCacheSizePaddingGotSize(SizePaddingCallback callback,
+                                        int cache_size);
+  void PaddingDidQueryCache(
+      SizePaddingCallback callback,
+      int cache_size,
+      CacheStorageError error,
+      std::unique_ptr<QueryCacheResults> query_cache_results);
+
+  // Calculate the size (but not padding) of the cache.
+  void CalculateCacheSize(const net::CompletionCallback& callback);
+
   void InitBackend();
   void InitDidCreateBackend(base::OnceClosure callback,
                             CacheStorageError cache_create_error);
   void InitGotCacheSize(base::OnceClosure callback,
                         CacheStorageError cache_create_error,
                         int cache_size);
+  void InitGotCacheSizeAndPadding(base::OnceClosure callback,
+                                  CacheStorageError cache_create_error,
+                                  int64_t cache_size,
+                                  int64_t cache_padding);
   void DeleteBackendCompletedIO();
 
   std::unique_ptr<storage::BlobDataHandle> PopulateResponseBody(
@@ -387,7 +441,11 @@ class CONTENT_EXPORT CacheStorageCache {
   BackendState backend_state_ = BACKEND_UNINITIALIZED;
   std::unique_ptr<CacheStorageScheduler> scheduler_;
   bool initializing_ = false;
+  // The actual cache size (not including padding).
   int64_t cache_size_;
+  int64_t cache_padding_ = 0;
+  std::unique_ptr<crypto::SymmetricKey> cache_padding_key_;
+  int64_t last_reported_size_ = 0;
   size_t max_query_size_bytes_;
   CacheStorageCacheObserver* cache_observer_;