Hi Jarno, Thank you very much for your valuable information. ovs-appctl ofproto/trace gave me a good insight into action processing in userspace.
Thanks & Regards, Uday -----Original Message----- From: Jarno Rajahalme [mailto:jrajaha...@nicira.com] Sent: Friday, August 07, 2015 10:06 PM To: Ravulakollu Udaya Kumar (WT01 - Product Engineering Service) Cc: dev@openvswitch.org Subject: Re: [ovs-dev] upcall processing in userspace Uday, ofproto-dpif-upcall.c calls into ofproto-dpif-xlate.c that performs flow lookups and thereby find the actions that should be applied to the packet. For example, action types are discerned in do_xlate_actions(). The “normal” action is actually a special port number (OFPP_NORMAL) and is processed by late_output_action(). To see the flow lookups and action processing in action, you should get familiar with “ovs-appctl ofproto/trace”. You can find numerous examples by: $ cd tests $ git grep “ofproto/trace” Regards, Jarno > On Aug 7, 2015, at 7:57 AM, <ravulakollu.ku...@wipro.com> > <ravulakollu.ku...@wipro.com> wrote: > > Hi Team, > > I am debugging upcall processing in ofproto-dpif-upcall.c file . I am > not able to visualize how opfbuf structure is being filled with actions(Note: > My bridge is configured without OF rules, meaning actions=NORMAL). > I could see packet is being flooded for unknown mac, vlan in the code. > But somehow dpif_netlink_operate is receiving proper netlink action > attributes in sequence to be executed in DP. > Also I could see in gdb xout.odp_actions is only holding some addresses. How > to know what actually resides in this address. > (gdb) p upcall->xout.odp_actions->data > $7 = (void *) 0x7f6275a53398 > > Could someone please , let me know how this buffer is being filled, and what > is the importance of ofpbuf. > > Thanks in Advance, > Uday > The information contained in this electronic message and any > attachments to this message are intended for the exclusive use of the > addressee(s) and may contain proprietary, confidential or privileged > information. If you are not the intended recipient, you should not > disseminate, distribute or copy this e-mail. Please notify the sender > immediately and destroy all copies of this message and any > attachments. WARNING: Computer viruses can be transmitted via email. > The recipient should check this email and any attachments for the > presence of viruses. The company accepts no liability for any damage > caused by any virus transmitted by this email. www.wipro.com > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
