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-rw-r--r--e2fslib/freefs.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/e2fslib/freefs.c b/e2fslib/freefs.c
new file mode 100644
index 0000000..5cb3cf8
--- /dev/null
+++ b/e2fslib/freefs.c
@@ -0,0 +1,137 @@
+/*
+ * freefs.c --- free an ext2 filesystem
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fsP.h"
+
+static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
+
+void ext2fs_free(ext2_filsys fs)
+{
+ if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
+ return;
+ if (fs->io) {
+ io_channel_close(fs->io);
+ }
+ if (fs->device_name)
+ ext2fs_free_mem((void **) &fs->device_name);
+ if (fs->super)
+ ext2fs_free_mem((void **) &fs->super);
+ if (fs->orig_super)
+ ext2fs_free_mem((void **) &fs->orig_super);
+ if (fs->group_desc)
+ ext2fs_free_mem((void **) &fs->group_desc);
+ if (fs->block_map)
+ ext2fs_free_block_bitmap(fs->block_map);
+ if (fs->inode_map)
+ ext2fs_free_inode_bitmap(fs->inode_map);
+
+ if (fs->badblocks)
+ ext2fs_badblocks_list_free(fs->badblocks);
+ fs->badblocks = 0;
+
+ if (fs->dblist)
+ ext2fs_free_dblist(fs->dblist);
+
+ if (fs->icache)
+ ext2fs_free_inode_cache(fs->icache);
+
+ fs->magic = 0;
+
+ ext2fs_free_mem((void **) &fs);
+}
+
+void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap)
+{
+ if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP))
+ return;
+
+ bitmap->magic = 0;
+ if (bitmap->description) {
+ ext2fs_free_mem((void **) &bitmap->description);
+ bitmap->description = 0;
+ }
+ if (bitmap->bitmap) {
+ ext2fs_free_mem((void **) &bitmap->bitmap);
+ bitmap->bitmap = 0;
+ }
+ ext2fs_free_mem((void **) &bitmap);
+}
+
+void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
+{
+ if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
+ return;
+
+ bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
+ ext2fs_free_generic_bitmap(bitmap);
+}
+
+void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
+{
+ if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
+ return;
+
+ bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
+ ext2fs_free_generic_bitmap(bitmap);
+}
+
+/*
+ * Free the inode cache structure
+ */
+static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
+{
+ if (--icache->refcount)
+ return;
+ if (icache->buffer)
+ ext2fs_free_mem((void **) &icache->buffer);
+ if (icache->cache)
+ ext2fs_free_mem((void **) &icache->cache);
+ icache->buffer_blk = 0;
+ ext2fs_free_mem((void **) &icache);
+}
+
+/*
+ * This procedure frees a badblocks list.
+ */
+void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
+{
+ if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
+ return;
+
+ if (bb->list)
+ ext2fs_free_mem((void **) &bb->list);
+ bb->list = 0;
+ ext2fs_free_mem((void **) &bb);
+}
+
+/*
+ * Free a directory block list
+ */
+void ext2fs_free_dblist(ext2_dblist dblist)
+{
+ if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
+ return;
+
+ if (dblist->list)
+ ext2fs_free_mem((void **) &dblist->list);
+ dblist->list = 0;
+ if (dblist->fs && dblist->fs->dblist == dblist)
+ dblist->fs->dblist = 0;
+ dblist->magic = 0;
+ ext2fs_free_mem((void **) &dblist);
+}
+