From dcb36fd007ddb32d8c5cfcf5e9ddb3d713d65396 Mon Sep 17 00:00:00 2001
From: Hongxu Jia <hongxu.jia@windriver.com>
Date: Tue, 21 Jul 2020 09:43:03 +0800
Subject: [PATCH] fix up check for hardlinks always false if inode > 0xFFFFFFFF

Since commit [382ed4a1 e2fsck: use proper types for variables][1]
applied, it used ext2_ino_t instead of ino_t for referencing inode
numbers, but the type of is_hardlink's `ino' should not be instead,
The ext2_ino_t is 32bit, if inode > 0xFFFFFFFF, its value will be
truncated.

Add a debug printf to show the value of inode, when it check for hardlink
files, it will always return false if inode > 0xFFFFFFFF
|--- a/misc/create_inode.c
|+++ b/misc/create_inode.c
|@@ -605,6 +605,7 @@ static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ext2_ino_t ino)
| {
|        int i;
|
|+       printf("%s %d, %lX, %lX\n", __FUNCTION__, __LINE__, hdlinks->hdl[i].src_ino, ino);
|        for (i = 0; i < hdlinks->count; i++) {
|                if (hdlinks->hdl[i].src_dev == dev &&
|                    hdlinks->hdl[i].src_ino == ino)

Here is debug message:
is_hardlink 608, 2913DB886, 913DB886

The length of ext2_ino_t is 32bit (typedef __u32 __bitwise ext2_ino_t;),
and ino_t is 64bit on 64bit system (such as x86-64), recover `ino' to ino_t.

[1] https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=382ed4a1c2b60acb9db7631e86dda207bde6076e

Upstream-Status: Submitted [https://github.com/tytso/e2fsprogs/pull/48]

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
 misc/create_inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc/create_inode.c b/misc/create_inode.c
index e8d1df6b..837f3875 100644
--- a/misc/create_inode.c
+++ b/misc/create_inode.c
@@ -601,7 +601,7 @@ out:
 	return err;
 }
 
-static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ext2_ino_t ino)
+static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ino_t ino)
 {
 	int i;
 
-- 
2.18.2