Add support for byterange requests in the storage layer.

[bluesky.git] / bluesky / bluesky-private.h

diff --git a/bluesky/bluesky-private.h b/bluesky/bluesky-private.h
index 74b4e06..1574a54 100644 (file)
--- a/bluesky/bluesky-private.h
+++ b/bluesky/bluesky-private.h
@@ -75,6 +75,14 @@ void bluesky_crypt_derive_keys(BlueSkyCryptKeys *keys, const gchar *master);
 BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key);
 BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key);
 
+void bluesky_crypt_block_encrypt(gchar *cloud_block, size_t len,
+                                 BlueSkyCryptKeys *keys);
+gboolean bluesky_crypt_block_decrypt(gchar *cloud_block, size_t len,
+                                     BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_encrypt(GString *segment, BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_decrypt(char *segment, size_t len,
+                              BlueSkyCryptKeys *keys);
+
 /* Storage layer.  Requests can be performed asynchronously, so these objects
  * help keep track of operations in progress. */
 typedef enum {
@@ -93,8 +101,8 @@ typedef enum {
 } BlueSkyAsyncStatus;
 
 struct BlueSkyNotifierList;
-typedef struct _BlueSkyStoreAsync BlueSkyStoreAsync;
-struct _BlueSkyStoreAsync {
+typedef struct BlueSkyStoreAsync BlueSkyStoreAsync;
+struct BlueSkyStoreAsync {
     BlueSkyStore *store;
 
     GMutex *lock;
@@ -108,6 +116,14 @@ struct _BlueSkyStoreAsync {
     gchar *key;                 /* Key to read/write */
     BlueSkyRCStr *data;         /* Data read/to write */
 
+    /* For range requests on reads: starting byte offset and length; len 0
+     * implies reading to the end of the object.  At completion, the backend
+     * should set range_done if a range read was made; if not set the entire
+     * object was read and the storage layer will select out just the
+     * appropriate bytes. */
+    size_t start, len;
+    gboolean range_done;
+
     int result;                 /* Result code; 0 for success. */
     struct BlueSkyNotifierList *notifiers;
     gint notifier_count;
@@ -240,6 +256,7 @@ struct cloudlog_header {
 
 #define JOURNAL_MAGIC "\nLog"
 #define CLOUDLOG_MAGIC "AgI-"
+#define CLOUDLOG_MAGIC_ENCRYPTED "AgI="     // CLOUDLOG_MAGIC[3] ^= 0x10
 
 /* A record which tracks an object which has been written to a local log,
  * cached, locally, and/or written to the cloud. */
@@ -247,7 +264,7 @@ struct cloudlog_header {
 #define CLOUDLOG_CLOUD      0x02
 #define CLOUDLOG_CACHE      0x04
 #define CLOUDLOG_UNCOMMITTED 0x10
-struct _BlueSkyCloudLog {
+struct BlueSkyCloudLog {
     gint refcount;
     GMutex *lock;
     GCond *cond;
@@ -291,7 +308,7 @@ struct _BlueSkyCloudLog {
 };
 
 /* Serialize objects into a log segment to be written to the cloud. */
-struct _BlueSkyCloudLogState {
+struct BlueSkyCloudLogState {
     GString *data;
     BlueSkyCloudPointer location;
     GList *inode_list;
@@ -326,7 +343,7 @@ void bluesky_cloudlog_flush(BlueSkyFS *fs);
 uint32_t crc32c(uint32_t crc, const char *buf, unsigned int length);
 uint32_t crc32c_finalize(uint32_t crc);
 
-struct _BlueSkyLog {
+struct BlueSkyLog {
     BlueSkyFS *fs;
     char *log_directory;
     GAsyncQueue *queue;
@@ -353,7 +370,7 @@ struct _BlueSkyLog {
 /* An object for tracking log files which are stored locally--either the
  * journal for filesystem consistency or log segments which have been fetched
  * back from cloud storage. */
-struct _BlueSkyCacheFile {
+struct BlueSkyCacheFile {
     GMutex *lock;
     GCond *cond;
     gint refcount;