01/02: [VFATLIB] Only check volume if full scan or if allowed to fix it

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=54f383d9965463bf036f9…

commit 54f383d9965463bf036f92affcda6c44b0dc4ffa
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Tue Jun 5 19:30:11 2018 +0200
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Tue Jun 5 19:34:47 2018 +0200

    [VFATLIB] Only check volume if full scan or if allowed to fix it
    
    This allows doing a quick probe about whether a volume needs to be
    fixed by checking its dirty bit.
    
    CORE-14692
---
 sdk/lib/fslib/vfatlib/vfatlib.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sdk/lib/fslib/vfatlib/vfatlib.c b/sdk/lib/fslib/vfatlib/vfatlib.c
index 8db6e8a11a..82c1282fbf 100644
--- a/sdk/lib/fslib/vfatlib/vfatlib.c
+++ b/sdk/lib/fslib/vfatlib/vfatlib.c
@@ -428,6 +428,14 @@ VfatChkdsk(IN PUNICODE_STRING DriveRoot,
         /* No need to check FS */
         return (fs_close(FALSE) == 0 ? STATUS_SUCCESS : STATUS_DISK_CORRUPT_ERROR);
     }
+    else if (CheckOnlyIfDirty && fs_isdirty())
+    {
+        if (!(FsCheckFlags & FSCHECK_READ_WRITE) && !(FsCheckFlags &
FSCHECK_INTERACTIVE))
+        {
+            fs_close(FALSE);
+            return STATUS_DISK_CORRUPT_ERROR;
+        }
+    }
 
     read_boot(&fs);