SMB2: Fix share type handling

In fs/cifs/smb2pdu.h, we have:
#define SMB2_SHARE_TYPE_DISK    0x01
#define SMB2_SHARE_TYPE_PIPE    0x02
#define SMB2_SHARE_TYPE_PRINT   0x03

Knowing that, with the current code, the SMB2_SHARE_TYPE_PRINT case can
never trigger and printer share would be interpreted as disk share.

So, test the ShareType value for equality instead.

Fixes: faaf946a7d5b ("CIFS: Add tree connect/disconnect capability for SMB2")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index e0517f499c38..e4afdaae743f 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1240,15 +1240,19 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
                 goto tcon_exit;
         }
 
-        if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
+        switch (rsp->ShareType) {
+        case SMB2_SHARE_TYPE_DISK:
                 cifs_dbg(FYI, "connection to disk share\n");
-        else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
+                break;
+        case SMB2_SHARE_TYPE_PIPE:
                 tcon->ipc = true;
                 cifs_dbg(FYI, "connection to pipe share\n");
-        } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
-                tcon->print = true;
+                break;
+        case SMB2_SHARE_TYPE_PRINT:
+                tcon->ipc = true;
                 cifs_dbg(FYI, "connection to printer\n");
-        } else {
+                break;
+        default:
                 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
                 rc = -EOPNOTSUPP;
                 goto tcon_error_exit;