Re: [PATCH v2 1/1] smb: client: Fix hang in smb2_reconnect

[Rickard x Andersson <rickaran@xxxxxxxx>]

On 4/13/24 11:02, Steve French wrote:
> Shyam and I tried some experiments and there are two cases where the
> patch breaks:
> 1) ChangeNotify will time out
> 2) Certainly byte range lock calls (they can be allowed to block) will timeout
>
> An obvious alternative would be to not make this change for the
> commands like ChangeNotify and blocking locks but allow it for the
> others.

Would it make sense to make the patch less intrusive by doing something 
like the following?:

@@ -1209,7 +1216,12 @@ compound_send_recv(const unsigned int xid, struct 
cifs_ses *ses,
        spin_unlock(&ses->ses_lock);

        for (i = 0; i < num_rqst; i++) {
-               rc = wait_for_response(server, midQ[i]);
+               if (flags == CIFS_NEG_OP) {

+                       rc = wait_for_response(server, midQ[i], 50*1000);
+               }
+               else
+                       rc = wait_for_response(server, midQ[i], -1);
                if (rc != 0)
                        break;



So, we are just waiting with timeout in the case it is a "CIFS_NEG_OP".

Note that I am not familiar at all with this code base.

Best regards,
Rickard