X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Fserialize.c;h=5eb7c1d2dd1baeba0eeb208d15ebbf187dfcb8da;hb=1c12fd8fc5ede1bb2e991ba65e2c59831c5718c5;hp=c806d88f64198e84684ae600ed4afed2f7c33180;hpb=92a6fa8cd45e12f70f65f9d9fc6d1cdd6592878a;p=bluesky.git

diff --git a/bluesky/serialize.c b/bluesky/serialize.c
index c806d88..5eb7c1d 100644
--- a/bluesky/serialize.c
+++ b/bluesky/serialize.c
@@ -11,12 +11,21 @@
 #include <glib.h>
 #include <string.h>
 
-#include "bluesky.h"
+#include "bluesky-private.h"
 
 /* Serialization of in-memory filesystem data structures to bytestrings which
  * 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;
@@ -92,27 +124,41 @@ void bluesky_serialize_inode(GString *out, BlueSkyInode *inode)
 
         break;
     }
+
+    case BLUESKY_SYMLINK:
+    {
+        g_string_append(out, inode->symlink_contents);
+        g_string_append_c(out, '\0');
+    }
+
     default:
         g_warning("Serialization for inode type %d not implemented!\n",
                   inode->type);
     }
 }
 
-BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf)
+/* Deserialize an inode into an in-memory representation.  Returns a boolean
+ * indicating whether the deserialization was successful. */
+gboolean bluesky_deserialize_inode(BlueSkyInode *inode, const gchar *buf)
 {
+    g_print("Deserializing inode %lld...\n", (long long)inode->inum);
+
     struct serialized_inode *raw = (struct serialized_inode *)buf;
 
     if (GUINT64_FROM_LE(raw->signature) != INODE_MAGIC)
-        return NULL;
+        return FALSE;
 
-    BlueSkyInode *inode = bluesky_new_inode(GUINT64_FROM_LE(raw->inum),
-                                            fs, GUINT32_FROM_LE(raw->type));
+    if (inode->inum != GUINT64_FROM_LE(raw->inum))
+        return FALSE;
+
+    bluesky_init_inode(inode, GUINT32_FROM_LE(raw->type));
 
     inode->mode = GUINT32_FROM_LE(raw->mode);
     inode->uid = GUINT32_FROM_LE(raw->uid);
     inode->gid = GUINT32_FROM_LE(raw->gid);
     inode->nlink = GUINT32_FROM_LE(raw->nlink);
     inode->change_count = GUINT64_FROM_LE(raw->change_count);
+    inode->change_commit = inode->change_count;
     inode->atime = GINT64_FROM_LE(raw->atime);
     inode->ctime = GINT64_FROM_LE(raw->ctime);
     inode->mtime = GINT64_FROM_LE(raw->mtime);
@@ -120,8 +166,6 @@ BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf)
 
     buf += sizeof(struct serialized_inode);
 
-    g_print("Deserializing inode %lld...\n", (long long)inode->inum);
-
     /* TODO: Bounds checking */
     switch (inode->type) {
     case BLUESKY_REGULAR:
@@ -152,10 +196,13 @@ 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);
@@ -165,10 +212,16 @@ BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf)
         }
         break;
     }
+
+    case BLUESKY_SYMLINK:
+    {
+        inode->symlink_contents = g_strdup(buf);
+    }
+
     default:
         g_warning("Deserialization for inode type %d not implemented!\n",
                   inode->type);
     }
 
-    return inode;
+    return TRUE;
 }