libext2fs-handle-inline_data-in-block-iterator-function

libext2fs: handle inline_data in block iterator function

From: Zheng Liu <wenqing.lz@taobao.com>

We needn't traverse blocks for an inode which has inline data because no block
belongs to it.  After appling this patch, the following commands in debugfs can
handle inline_data feature:
	- icheck
	- blocks
	- filefrag

In some places, block iterator functions are used to traverse blocks of
directory.  In this case, we need to check whether inode has inline_data flag or
not, and handle it manually.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 lib/ext2fs/block.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/ext2fs/block.c b/lib/ext2fs/block.c
index 68dcb03..4abcedf 100644
--- a/lib/ext2fs/block.c
+++ b/lib/ext2fs/block.c
@@ -345,6 +345,13 @@ errcode_t ext2fs_block_iterate3(ext2_filsys fs,
 		return ctx.errcode;
 
 	/*
+	 * If an inode has inline data, we needn't traverse its blocks
+	 * because no block belong to this inode.
+	 */
+	if (inode.i_flags & EXT4_INLINE_DATA_FL)
+		return ctx.errcode;
+
+	/*
 	 * Check to see if we need to limit large files
 	 */
 	if (flags & BLOCK_FLAG_NO_LARGE) {
-- 
1.7.12.rc0.22.gcdd159b