Add filesystem superblock serialization.

[bluesky.git] / bluesky / serialize.c

diff --git a/bluesky/serialize.c b/bluesky/serialize.c
index c806d88..7f7f041 100644 (file)
--- a/bluesky/serialize.c
+++ b/bluesky/serialize.c
@@ -17,6 +17,15 @@
  * can be written to persistent storage.  All data is stored in little-endian
  * format. */
 
+/* Magic signature and structure of serialized superblocks. */
+
+#define SUPERBLOCK_MAGIC 0x65ca91e91b124234ULL
+
+struct serialized_superblock {
+    uint64_t signature;         /* SUPERBLOCK_MAGIC */
+    uint64_t next_inum;
+} __attribute__((packed));
+
 /* Magic signature for serialized inodes. */
 
 #define INODE_MAGIC 0xa6832100943d71e6ULL
@@ -35,6 +44,29 @@ struct serialized_inode {
     int64_t ntime;
 } __attribute__((packed));
 
+void bluesky_serialize_superblock(GString *out, BlueSkyFS *fs)
+{
+    struct serialized_superblock buf;
+
+    buf.signature = GUINT64_TO_LE(SUPERBLOCK_MAGIC);
+    buf.next_inum = GUINT64_TO_LE(fs->next_inum);
+
+    g_string_append_len(out, (gchar *)&buf, sizeof(buf));
+}
+
+BlueSkyFS *bluesky_deserialize_superblock(const gchar *buf)
+{
+    struct serialized_superblock *raw = (struct serialized_superblock *)buf;
+
+    if (GUINT64_FROM_LE(raw->signature) != SUPERBLOCK_MAGIC)
+        return NULL;
+
+    BlueSkyFS *fs = bluesky_new_fs("deserialized");
+    fs->next_inum = GUINT64_FROM_LE(raw->next_inum);
+
+    return fs;
+}
+
 void bluesky_serialize_inode(GString *out, BlueSkyInode *inode)
 {
     struct serialized_inode buf;
@@ -152,10 +184,13 @@ BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf)
             dirent->cookie = GUINT64_FROM_LE(d->seq);
             dirent->inum = GUINT64_FROM_LE(d->inum);
             dirent->name = g_strdup(d->name);
+            dirent->name_folded = bluesky_lowercase(d->name);
 
             g_sequence_insert_sorted(inode->dirents, dirent,
                                      bluesky_dirent_compare, NULL);
             g_hash_table_insert(inode->dirhash, dirent->name, dirent);
+            g_hash_table_insert(inode->dirhash_folded, dirent->name_folded,
+                                dirent);
 
             g_print("  dirent[%08x]: %s -> %"PRIu64"\n",
                     dirent->cookie, dirent->name, dirent->inum);