*/
#include <stdint.h>
+#include <inttypes.h>
#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
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;
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);
buf += sizeof(struct serialized_inode);
- g_print("Deserializing inode %lld...\n", (long long)inode->inum);
-
/* TODO: Bounds checking */
switch (inode->type) {
case BLUESKY_REGULAR:
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 -> %lld\n",
+ g_print(" dirent[%08x]: %s -> %"PRIu64"\n",
dirent->cookie, dirent->name, dirent->inum);
buf = strchr(d->name, '\0') + 1;
}
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;
}