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Diffstat (limited to 'e2fsprogs/old_e2fsprogs/ext2fs/expanddir.c')
-rw-r--r--e2fsprogs/old_e2fsprogs/ext2fs/expanddir.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/expanddir.c b/e2fsprogs/old_e2fsprogs/ext2fs/expanddir.c
new file mode 100644
index 0000000..8a29ae5
--- /dev/null
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/expanddir.c
@@ -0,0 +1,127 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * expand.c --- expand an ext2fs directory
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+struct expand_dir_struct {
+ int done;
+ int newblocks;
+ errcode_t err;
+};
+
+static int expand_dir_proc(ext2_filsys fs,
+ blk_t *blocknr,
+ e2_blkcnt_t blockcnt,
+ blk_t ref_block EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data;
+ blk_t new_blk;
+ static blk_t last_blk = 0;
+ char *block;
+ errcode_t retval;
+
+ if (*blocknr) {
+ last_blk = *blocknr;
+ return 0;
+ }
+ retval = ext2fs_new_block(fs, last_blk, 0, &new_blk);
+ if (retval) {
+ es->err = retval;
+ return BLOCK_ABORT;
+ }
+ if (blockcnt > 0) {
+ retval = ext2fs_new_dir_block(fs, 0, 0, &block);
+ if (retval) {
+ es->err = retval;
+ return BLOCK_ABORT;
+ }
+ es->done = 1;
+ retval = ext2fs_write_dir_block(fs, new_blk, block);
+ } else {
+ retval = ext2fs_get_mem(fs->blocksize, &block);
+ if (retval) {
+ es->err = retval;
+ return BLOCK_ABORT;
+ }
+ memset(block, 0, fs->blocksize);
+ retval = io_channel_write_blk(fs->io, new_blk, 1, block);
+ }
+ if (retval) {
+ es->err = retval;
+ return BLOCK_ABORT;
+ }
+ ext2fs_free_mem(&block);
+ *blocknr = new_blk;
+ ext2fs_block_alloc_stats(fs, new_blk, +1);
+ es->newblocks++;
+
+ if (es->done)
+ return (BLOCK_CHANGED | BLOCK_ABORT);
+ else
+ return BLOCK_CHANGED;
+}
+
+errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir)
+{
+ errcode_t retval;
+ struct expand_dir_struct es;
+ struct ext2_inode inode;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if (!(fs->flags & EXT2_FLAG_RW))
+ return EXT2_ET_RO_FILSYS;
+
+ if (!fs->block_map)
+ return EXT2_ET_NO_BLOCK_BITMAP;
+
+ retval = ext2fs_check_directory(fs, dir);
+ if (retval)
+ return retval;
+
+ es.done = 0;
+ es.err = 0;
+ es.newblocks = 0;
+
+ retval = ext2fs_block_iterate2(fs, dir, BLOCK_FLAG_APPEND,
+ 0, expand_dir_proc, &es);
+
+ if (es.err)
+ return es.err;
+ if (!es.done)
+ return EXT2_ET_EXPAND_DIR_ERR;
+
+ /*
+ * Update the size and block count fields in the inode.
+ */
+ retval = ext2fs_read_inode(fs, dir, &inode);
+ if (retval)
+ return retval;
+
+ inode.i_size += fs->blocksize;
+ inode.i_blocks += (fs->blocksize / 512) * es.newblocks;
+
+ retval = ext2fs_write_inode(fs, dir, &inode);
+ if (retval)
+ return retval;
+
+ return 0;
+}