TWSD-636 "slb direct fwd" enables TCP failure connecting

Review Request #786 — Created April 11, 2025 and submitted — Latest diff uploaded

Information
tanya
APV10
rel_apv_10_7, rel_apv_10_7_3.
TWSD-636
Reviewers
peteryeh, prajesh, satyendra, timlai, timsu 
Ported the fix for Bj bug BJ Bug139213 TCP Connection Failure Issue with DirectFWD and SYN Packets. However I do not think Bj fix is %100 correct (condition in Bj fix (tuples->th->th_flags & TH_SYN)), it does not check for flags that not supposed to be set (for example syn_ack), so I put different condition that Bj fix.


Original BJ fix from rel_apv_10_4_2. is below

Index: fastslb_tcp.c

===================================================================

--- fastslb_tcp.c   (revision 36634)

+++ fastslb_tcp.c   (revision 36635)

@@ -426,7 +426,7 @@

        /When syn_cache_enable is off,

reverse mode,transparent mode, only SYN packet can build fastpcb.

         */

-       if(tuples->th->th_flags == TH_SYN) {

+       if(tuples->th->th_flags & TH_SYN) {

            return fasttcp_passive_open(tuples, m, vs_p, real_ifp, NULL);

        } else {

            if (cross_numa_enable && numa_dispatcher && ATCP_IS_L4() && numa_enqueue(m)) {




 














 

 










   

    
    

    

    


    


      

        
      

    

    

   

  

 





    


    

    





     
    
    
    
   
    
  
    
  
    
   
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