fs/ntfs3: Refactor ni_parse_reparse

Change argument from void* to struct REPARSE_DATA_BUFFER*
We copy data to buffer, so we can read it later in ntfs_read_mft.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 007602badd90..ecb965e4afd0 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -1710,18 +1710,16 @@ out:
 /*
  * ni_parse_reparse
  *
- * Buffer is at least 24 bytes.
+ * buffer - memory for reparse buffer header
  */
 enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
-				   void *buffer)
+				   struct REPARSE_DATA_BUFFER *buffer)
 {
 	const struct REPARSE_DATA_BUFFER *rp = NULL;
 	u8 bits;
 	u16 len;
 	typeof(rp->CompressReparseBuffer) *cmpr;
 
-	static_assert(sizeof(struct REPARSE_DATA_BUFFER) <= 24);
-
 	/* Try to estimate reparse point. */
 	if (!attr->non_res) {
 		rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER));
@@ -1807,6 +1805,9 @@ enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
 		return REPARSE_NONE;
 	}
 
+	if (buffer != rp)
+		memcpy(buffer, rp, sizeof(struct REPARSE_DATA_BUFFER));
+
 	/* Looks like normal symlink. */
 	return REPARSE_LINK;
 }