X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Finode.c;h=44ef63cd1304580b1d31a68f40a6025d6e78b008;hb=b7e08dcf6552eb8977ccef56f00e775da8133cf8;hp=b62870df674259229fbdaf4c060cd475835a1d80;hpb=1c01b8eab9e65d1e8856b9589413915e4cca8cac;p=bluesky.git

diff --git a/bluesky/inode.c b/bluesky/inode.c
index b62870d..44ef63c 100644
--- a/bluesky/inode.c
+++ b/bluesky/inode.c
@@ -12,7 +12,7 @@
 #include <glib.h>
 #include <string.h>
 
-#include "bluesky.h"
+#include "bluesky-private.h"
 
 /* Core filesystem.  Different proxies, such as the NFSv3 one, interface to
  * this, but the core actually tracks the data which is stored.  So far we just
@@ -73,6 +73,36 @@ BlueSkyFS *bluesky_new_fs(gchar *name)
     return fs;
 }
 
+BlueSkyFS *bluesky_init_fs(gchar *name, BlueSkyStore *store)
+{
+    BlueSkyRCStr *data = bluesky_store_get(store, "superblock");
+    if (data != NULL) {
+        BlueSkyFS *fs = bluesky_deserialize_superblock(data->data);
+        if (fs != NULL) {
+            fs->store = store;
+            g_print("Loaded filesystem superblock\n");
+            g_free(fs->name);
+            fs->name = g_strdup(name);
+            return fs;
+        }
+    }
+
+    g_print("Initializing fresh filesystem\n");
+    BlueSkyFS *fs = bluesky_new_fs(name);
+    fs->store = store;
+
+    BlueSkyInode *root = bluesky_new_inode(BLUESKY_ROOT_INUM, fs,
+                                           BLUESKY_DIRECTORY);
+    root->nlink = 1;
+    root->mode = 0755;
+    bluesky_insert_inode(fs, root);
+
+    bluesky_inode_flush(fs, root);
+    bluesky_superblock_flush(fs);
+
+    return fs;
+}
+
 /* Inode reference counting. */
 void bluesky_inode_ref(BlueSkyInode *inode)
 {
@@ -96,6 +126,8 @@ uint64_t bluesky_fs_alloc_inode(BlueSkyFS *fs)
     inum = fs->next_inum;
     fs->next_inum++;
 
+    bluesky_superblock_flush(fs);
+
     return inum;
 }
 
@@ -138,6 +170,10 @@ BlueSkyInode *bluesky_get_inode(BlueSkyFS *fs, uint64_t inum)
 {
     BlueSkyInode *inode = NULL;
 
+    if (inum == 0) {
+        return NULL;
+    }
+
     g_mutex_lock(fs->lock);
     inode = (BlueSkyInode *)g_hash_table_lookup(fs->inodes, &inum);
 
@@ -166,9 +202,7 @@ 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);
+    BlueSkyRCStr *data = bluesky_string_new_from_gstring(buf);
 
     char key[64];
     sprintf(key, "inode-%016"PRIx64, inode->inum);
@@ -188,6 +222,17 @@ void bluesky_inode_fetch(BlueSkyFS *fs, uint64_t inum)
     BlueSkyInode *inode = bluesky_deserialize_inode(fs, data->data);
     if (inode != NULL) {
         bluesky_insert_inode(fs, inode);
-        g_print("Loaded inode %"PRIu64"\n", inum);
     }
 }
+
+/* Synchronize filesystem superblock to stable storage. */
+void bluesky_superblock_flush(BlueSkyFS *fs)
+{
+    GString *buf = g_string_new("");
+    bluesky_serialize_superblock(buf, fs);
+    BlueSkyRCStr *data = bluesky_string_new_from_gstring(buf);
+
+    g_print("Syncing superblock...\n");
+
+    bluesky_store_put(fs->store, "superblock", data);
+}