CIFS: Implement follow_link for SMB2

that allows to access files through symlink created on a server.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 36b0d37ea69b..40baeae60b08 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -150,6 +150,20 @@ struct smb2_err_rsp {
         __u8   ErrorData[1];  /* variable length */
 } __packed;
 
+struct smb2_symlink_err_rsp {
+        __le32 SymLinkLength;
+        __le32 SymLinkErrorTag;
+        __le32 ReparseTag;
+        __le16 ReparseDataLength;
+        __le16 UnparsedPathLength;
+        __le16 SubstituteNameOffset;
+        __le16 SubstituteNameLength;
+        __le16 PrintNameOffset;
+        __le16 PrintNameLength;
+        __le32 Flags;
+        __u8  PathBuffer[0];
+} __packed;
+
 #define SMB2_CLIENT_GUID_SIZE 16
 
 extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];