From 6357b9d1de3bfb09811297406688810b4900df7b Mon Sep 17 00:00:00 2001
From: Michael Vrable <mvrable@cs.ucsd.edu>
Date: Fri, 4 Sep 2009 15:51:02 -0700
Subject: [PATCH] Proof-of-concept flushing of inodes to disk.

---
 bluesky/bluesky.h |  3 +++
 bluesky/dir.c     |  1 +
 bluesky/file.c    |  1 +
 bluesky/inode.c   | 16 ++++++++++++++++
 4 files changed, 21 insertions(+)

diff --git a/bluesky/bluesky.h b/bluesky/bluesky.h
index 8980c98..2cf97f6 100644
--- a/bluesky/bluesky.h
+++ b/bluesky/bluesky.h
@@ -199,6 +199,9 @@ void bluesky_file_write(BlueSkyInode *inode, uint64_t offset,
 void bluesky_file_read(BlueSkyInode *inode, uint64_t offset,
                        char *buf, gint len);
 
+void bluesky_inode_flush(BlueSkyFS *fs, BlueSkyInode *inode);
+void bluesky_serialize_inode(GString *out, BlueSkyInode *inode);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/bluesky/dir.c b/bluesky/dir.c
index 204439e..2690498 100644
--- a/bluesky/dir.c
+++ b/bluesky/dir.c
@@ -95,6 +95,7 @@ gboolean bluesky_directory_insert(BlueSkyInode *dir, gchar *name, uint64_t inum)
     g_hash_table_insert(dir->dirhash, d->name, d);
 
     bluesky_inode_update_ctime(dir, 1);
+    bluesky_inode_flush(dir->fs, dir);
 
     return TRUE;
 }
diff --git a/bluesky/file.c b/bluesky/file.c
index 4badc75..5f7d9cd 100644
--- a/bluesky/file.c
+++ b/bluesky/file.c
@@ -111,6 +111,7 @@ void bluesky_file_write(BlueSkyInode *inode, uint64_t offset,
     }
 
     bluesky_inode_update_ctime(inode, 1);
+    bluesky_inode_flush(inode->fs, inode);
 }
 
 void bluesky_file_read(BlueSkyInode *inode, uint64_t offset,
diff --git a/bluesky/inode.c b/bluesky/inode.c
index 8fdd882..a20b23b 100644
--- a/bluesky/inode.c
+++ b/bluesky/inode.c
@@ -6,6 +6,7 @@
  * TODO: Licensing
  */
 
+#include <stdio.h>
 #include <stdint.h>
 #include <glib.h>
 #include <string.h>
@@ -150,3 +151,18 @@ void bluesky_insert_inode(BlueSkyFS *fs, BlueSkyInode *inode)
     g_hash_table_insert(fs->inodes, &inode->inum, inode);
     g_mutex_unlock(fs->lock);
 }
+
+/* Synchronize an inode to stable storage. */
+void bluesky_inode_flush(BlueSkyFS *fs, BlueSkyInode *inode)
+{
+    GString *buf = g_string_new("");
+    bluesky_serialize_inode(buf, inode);
+
+    gsize len = buf->len;
+    BlueSkyRCStr *data = bluesky_string_new(g_string_free(buf, FALSE), len);
+
+    char key[64];
+    sprintf(key, "inode-%016llx", inode->inum);
+
+    bluesky_store_put(fs->store, key, data);
+}
-- 
2.20.1