Add checksumming to filesystem journal.

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

diff --git a/bluesky/bluesky-private.h b/bluesky/bluesky-private.h
index 8d2e3fc..83a383e 100644 (file)
--- a/bluesky/bluesky-private.h
+++ b/bluesky/bluesky-private.h
@@ -19,11 +19,17 @@
 extern "C" {
 #endif
 
+extern int bluesky_verbose;
+
 /* Target cache size levels. */
 extern int bluesky_watermark_low_dirty;
 extern int bluesky_watermark_medium_dirty;
 extern int bluesky_watermark_high_dirty;
 
+extern int bluesky_watermark_low_total;
+extern int bluesky_watermark_medium_total;
+extern int bluesky_watermark_high_total;
+
 /* TODO: Make this go away entirely. */
 BlueSkyFS *bluesky_new_fs(gchar *name);
 
@@ -139,10 +145,37 @@ void bluesky_block_touch(BlueSkyInode *inode, uint64_t i);
 void bluesky_block_fetch(BlueSkyFS *fs, BlueSkyBlock *block,
                          BlueSkyStoreAsync *barrier);
 void bluesky_block_flush(BlueSkyFS *fs, BlueSkyBlock *block,
-                         BlueSkyStoreAsync *barrier);
-void bluesky_file_flush(BlueSkyInode *inode, BlueSkyStoreAsync *barrier);
+                         BlueSkyStoreAsync *barrier, GList **log_items);
+void bluesky_file_flush(BlueSkyInode *inode, BlueSkyStoreAsync *barrier,
+                        GList **log_items);
 void bluesky_file_drop_cached(BlueSkyInode *inode);
 
+/* Logging infrastructure for ensuring operations are persistently recorded to
+ * disk. */
+#define BLUESKY_CRC32C_SEED (~(uint32_t)0)
+uint32_t crc32c(uint32_t crc, const char *buf, unsigned int length);
+uint32_t crc32c_finalize(uint32_t crc);
+
+struct _BlueSkyLog {
+    char *log_directory;
+    GAsyncQueue *queue;
+    int fd;
+    int seq_num;
+};
+
+typedef struct {
+    gboolean committed;
+    GMutex *lock;
+    GCond *cond;
+    char *key;
+    BlueSkyRCStr *data;
+} BlueSkyLogItem;
+
+BlueSkyLog *bluesky_log_new(const char *log_directory);
+BlueSkyLogItem *bluesky_log_item_new();
+void bluesky_log_item_submit(BlueSkyLogItem *item, BlueSkyLog *log);
+void bluesky_log_item_finish(BlueSkyLogItem *item);
+
 #ifdef __cplusplus
 }
 #endif