problem about smbd_smb2_flush_send_queue

[Jeremy Allison]

On Tue, Mar 31, 2020 at 11:42:44AM +0800, dongleilei wrote:
> Hi all:
>           I encountered a problem recently. 
>           when i copy files from samba share to windows client,  the copy process suddenly hung up waiting for response from samba ser
>           when i debug smbd process, i found the program enter here.
> 
> 
> in source3/smbd/smb2_server  smbd_smb2_flush_send_queue
> 
> 
>  ok = iov_advance(&e->vector, &e->count, ret);
> if (!ok) {
> return NT_STATUS_INTERNAL_ERROR;
> }
> 
> 
> if (e->count > 0) {
> /* we have more to write */                                enter here
> TEVENT_FD_WRITEABLE(xconn->transport.fde);
> return NT_STATUS_OK;
> }
> 
> 
> -----
> my question is : is there any way for smbd to resend the remaining data?
>                            why my client hung up for a long time?
> 

TEVENT_FD_WRITEABLE should be setting the outgoing fd as
ready to write out more data, and so the next trip through
the main event loop it should send more data.

What platform are you running on ?