Hi Damjan, The snort plugin could be simple. But I am not familiar with VPP memory/buffer management as such and I am finding it not so easy to navigate. And looking at the physmem.c/h code, it appears the VPP uses heap memory (mmap) and has its own heap/buffer management system. Could you clarify? And in the snort plugin exposes/shares the mmap memory region to the external program (snort). Is there any documentation that provides an overview of VPP buffer management and how VPP memory/buffers can be shared with external trusted applications?
Thank you - PK Das On Tue, May 24, 2022 at 7:51 AM Damjan Marion <dmar...@me.com> wrote: > > VPP is not DPDK application, VPP features doesnt maintain DPDK metadata, > in many cases we use native drivers so DPDK is not even loaded so you > cannot use rte_ring unless you want to write complete translation layer > which will likely be significantly slower that using native way which snort > plugin uses. > > Why do you think zero copy interface in snort plugin is not simple? > > — > Damjan > > On 24.05.2022., at 13:34, PRANAB DAS <pkdas.bos...@gmail.com> wrote: > > > Thank you very much for your response Benoit! > I am wondering if there is another option e.g. rte-ring of DPDK or if that > option is not feasible in VPP? > Could you comment? We are looking for a service-chaining application > similar to snort but would like to have a much simpler zero-copy interface. > > Thank you, > > - P K DAS > > On Tue, May 24, 2022 at 4:22 AM Benoit Ganne (bganne) <bga...@cisco.com> > wrote: > >> It all depends on what you want to do. Usually, we try to avoid sharing >> buffers read/write between multiple process, it makes debugging much harder >> - especially buffer leaks or use-after-free... >> Here is an example to share VPP buffers read-only with snort so that >> snort can inspect traffic and gives a verdict back without any copy: >> https://git.fd.io/vpp/tree/src/plugins/snort >> >> Best >> ben >> >> > -----Original Message----- >> > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of PRANAB DAS >> > Sent: Monday, May 23, 2022 20:11 >> > To: vpp-dev@lists.fd.io >> > Subject: Re: [vpp-dev] zero memcpy interface (alternative to memif) to >> > pass packets from VPP to another trusted DPDK application >> > >> > Hi >> > >> > Could some one comment on zero-copy alternative to memif interface? Any >> > ideas, comments are welcome. >> > >> > Thank you >> > >> > - Pranab K Das >> > > > >
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