From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 .../busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c | 156 +++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 release/src/router/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c

(limited to 'release/src/router/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c')

diff --git a/release/src/router/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c
new file mode 100644
index 00000000..635410da
--- /dev/null
+++ b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bmove.c
@@ -0,0 +1,156 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * bmove.c --- Move blocks around to make way for a particular
+ *	filesystem structure.
+ *
+ * Copyright (C) 1997 Theodore Ts'o.  This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fsP.h"
+
+struct process_block_struct {
+	ext2_ino_t		ino;
+	struct ext2_inode *	inode;
+	ext2fs_block_bitmap	reserve;
+	ext2fs_block_bitmap	alloc_map;
+	errcode_t		error;
+	char			*buf;
+	int			add_dir;
+	int			flags;
+};
+
+static int process_block(ext2_filsys fs, blk_t	*block_nr,
+			 e2_blkcnt_t blockcnt, blk_t ref_block,
+			 int ref_offset, void *priv_data)
+{
+	struct process_block_struct *pb;
+	errcode_t	retval;
+	int		ret;
+	blk_t		block, orig;
+
+	pb = (struct process_block_struct *) priv_data;
+	block = orig = *block_nr;
+	ret = 0;
+
+	/*
+	 * Let's see if this is one which we need to relocate
+	 */
+	if (ext2fs_test_block_bitmap(pb->reserve, block)) {
+		do {
+			if (++block >= fs->super->s_blocks_count)
+				block = fs->super->s_first_data_block;
+			if (block == orig) {
+				pb->error = EXT2_ET_BLOCK_ALLOC_FAIL;
+				return BLOCK_ABORT;
+			}
+		} while (ext2fs_test_block_bitmap(pb->reserve, block) ||
+			 ext2fs_test_block_bitmap(pb->alloc_map, block));
+
+		retval = io_channel_read_blk(fs->io, orig, 1, pb->buf);
+		if (retval) {
+			pb->error = retval;
+			return BLOCK_ABORT;
+		}
+		retval = io_channel_write_blk(fs->io, block, 1, pb->buf);
+		if (retval) {
+			pb->error = retval;
+			return BLOCK_ABORT;
+		}
+		*block_nr = block;
+		ext2fs_mark_block_bitmap(pb->alloc_map, block);
+		ret = BLOCK_CHANGED;
+		if (pb->flags & EXT2_BMOVE_DEBUG)
+			printf("ino=%ld, blockcnt=%lld, %d->%d\n", pb->ino,
+			       blockcnt, orig, block);
+	}
+	if (pb->add_dir) {
+		retval = ext2fs_add_dir_block(fs->dblist, pb->ino,
+					      block, (int) blockcnt);
+		if (retval) {
+			pb->error = retval;
+			ret |= BLOCK_ABORT;
+		}
+	}
+	return ret;
+}
+
+errcode_t ext2fs_move_blocks(ext2_filsys fs,
+			     ext2fs_block_bitmap reserve,
+			     ext2fs_block_bitmap alloc_map,
+			     int flags)
+{
+	ext2_ino_t	ino;
+	struct ext2_inode inode;
+	errcode_t	retval;
+	struct process_block_struct pb;
+	ext2_inode_scan	scan;
+	char		*block_buf;
+
+	retval = ext2fs_open_inode_scan(fs, 0, &scan);
+	if (retval)
+		return retval;
+
+	pb.reserve = reserve;
+	pb.error = 0;
+	pb.alloc_map = alloc_map ? alloc_map : fs->block_map;
+	pb.flags = flags;
+
+	retval = ext2fs_get_mem(fs->blocksize * 4, &block_buf);
+	if (retval)
+		return retval;
+	pb.buf = block_buf + fs->blocksize * 3;
+
+	/*
+	 * If GET_DBLIST is set in the flags field, then we should
+	 * gather directory block information while we're doing the
+	 * block move.
+	 */
+	if (flags & EXT2_BMOVE_GET_DBLIST) {
+		ext2fs_free_dblist(fs->dblist);
+		fs->dblist = NULL;
+		retval = ext2fs_init_dblist(fs, 0);
+		if (retval)
+			return retval;
+	}
+
+	retval = ext2fs_get_next_inode(scan, &ino, &inode);
+	if (retval)
+		return retval;
+
+	while (ino) {
+		if ((inode.i_links_count == 0) ||
+		    !ext2fs_inode_has_valid_blocks(&inode))
+			goto next;
+
+		pb.ino = ino;
+		pb.inode = &inode;
+
+		pb.add_dir = (LINUX_S_ISDIR(inode.i_mode) &&
+			      flags & EXT2_BMOVE_GET_DBLIST);
+
+		retval = ext2fs_block_iterate2(fs, ino, 0, block_buf,
+					      process_block, &pb);
+		if (retval)
+			return retval;
+		if (pb.error)
+			return pb.error;
+
+	next:
+		retval = ext2fs_get_next_inode(scan, &ino, &inode);
+		if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
+			goto next;
+	}
+	return 0;
+}
+
-- 
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