zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/read_bb.c b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/read_bb.c
new file mode 100644
index 0000000..b5a0d7b
--- /dev/null
+++ b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/read_bb.c
@@ -0,0 +1,103 @@
+/*
+ * read_bb --- read the bad blocks inode
+ *
+ * Copyright (C) 1994 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+struct read_bb_record {
+ ext2_badblocks_list bb_list;
+ errcode_t err;
+};
+
+/*
+ * Helper function for ext2fs_read_bb_inode()
+ */
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+static int mark_bad_block(ext2_filsys fs, blk_t *block_nr,
+ e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+ blk_t ref_block EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct read_bb_record *rb = (struct read_bb_record *) priv_data;
+
+ if (blockcnt < 0)
+ return 0;
+
+ if ((*block_nr < fs->super->s_first_data_block) ||
+ (*block_nr >= ext2fs_blocks_count(fs->super)))
+ return 0; /* Ignore illegal blocks */
+
+ rb->err = ext2fs_badblocks_list_add(rb->bb_list, *block_nr);
+ if (rb->err)
+ return BLOCK_ABORT;
+ return 0;
+}
+
+/*
+ * Reads the current bad blocks from the bad blocks inode.
+ */
+errcode_t ext2fs_read_bb_inode(ext2_filsys fs, ext2_badblocks_list *bb_list)
+{
+ errcode_t retval;
+ struct read_bb_record rb;
+ struct ext2_inode inode;
+ blk_t numblocks;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if (!*bb_list) {
+ retval = ext2fs_read_inode(fs, EXT2_BAD_INO, &inode);
+ if (retval)
+ return retval;
+ numblocks = inode.i_blocks;
+ if (!((fs->super->s_feature_ro_compat &
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
+ (inode.i_flags & EXT4_HUGE_FILE_FL)))
+ numblocks = numblocks / (fs->blocksize / 512);
+ numblocks += 20;
+ if (numblocks < 50)
+ numblocks = 50;
+ if (numblocks > 50000)
+ numblocks = 500;
+ retval = ext2fs_badblocks_list_create(bb_list, numblocks);
+ if (retval)
+ return retval;
+ }
+
+ rb.bb_list = *bb_list;
+ rb.err = 0;
+ retval = ext2fs_block_iterate2(fs, EXT2_BAD_INO, BLOCK_FLAG_READ_ONLY,
+ 0, mark_bad_block, &rb);
+ if (retval)
+ return retval;
+
+ return rb.err;
+}
+
+