From 99a2c80d00e4fbda5efccd28e3115d43cc28cfca Mon Sep 17 00:00:00 2001
From: Sorgelig <pour.garbage@gmail.com>
Date: Fri, 17 Sep 2021 20:12:52 +0800
Subject: [PATCH] exfat: use ATTR_SYSTEM as symlink flag to preserve links
 while copying on Windows or other OS.

---
 fs/exfat/exfat_api.h   | 8 ++++----
 fs/exfat/exfat_super.c | 2 +-
 fs/exfat/exfat_super.h | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/exfat/exfat_api.h b/fs/exfat/exfat_api.h
index ee6ab0f04..d42e732b0 100644
--- a/fs/exfat/exfat_api.h
+++ b/fs/exfat/exfat_api.h
@@ -62,17 +62,17 @@
 #define ATTR_NORMAL             0x0000
 #define ATTR_READONLY           0x0001
 #define ATTR_HIDDEN             0x0002
-#define ATTR_SYSTEM             0x0004
+#define ATTR_SYMLINK            0x0004
 #define ATTR_VOLUME             0x0008
 #define ATTR_SUBDIR             0x0010
 #define ATTR_ARCHIVE            0x0020
-#define ATTR_SYMLINK            0x0040
+#define ATTR_SYMLINK_OLD        0x0040
 #define ATTR_EXTEND             0x000F
 #define ATTR_RWMASK             0x007E
 
 /* file creation modes */
-#define FM_REGULAR              0x00
-#define FM_SYMLINK              0x40
+#define FM_REGULAR              ATTR_NORMAL
+#define FM_SYMLINK              ATTR_SYMLINK
 
 /* return values */
 #define FFS_SUCCESS             0
diff --git a/fs/exfat/exfat_super.c b/fs/exfat/exfat_super.c
index 99d793f65..3147deeb6 100644
--- a/fs/exfat/exfat_super.c
+++ b/fs/exfat/exfat_super.c
@@ -1470,7 +1470,7 @@ static int exfat_fill_inode(struct inode *inode, FILE_ID_T *fid)
 		i_size_write(inode, info.Size);
 		EXFAT_I(inode)->mmu_private = i_size_read(inode);
 		set_nlink(inode, info.NumSubdirs);
-	} else if (info.Attr & ATTR_SYMLINK) { /* symbolic link */
+	} else if (info.Attr & (ATTR_SYMLINK | ATTR_SYMLINK_OLD)) { /* symbolic link */
 		inode->i_generation |= 1;
 		inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO);
 		inode->i_op = &exfat_symlink_inode_operations;
diff --git a/fs/exfat/exfat_super.h b/fs/exfat/exfat_super.h
index c7780e1d3..3ca6b8d30 100644
--- a/fs/exfat/exfat_super.h
+++ b/fs/exfat/exfat_super.h
@@ -135,7 +135,7 @@ static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi,
 
 	if (attr & ATTR_SUBDIR)
 		return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
-	else if (attr & ATTR_SYMLINK)
+	else if (attr & (ATTR_SYMLINK | ATTR_SYMLINK_OLD))
 		return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
 	else
 		return (mode & ~sbi->options.fs_fmask) | S_IFREG;