Re: [dpdk-dev] [PATCH v2 1/3] lib/librte_ip_frag: Remove PKT_TX_IP_CKSUM offload flags

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas@monjalon.net]
> Sent: Thursday, July 4, 2019 5:53 PM
> To: Sunil Kumar Kori <skori@marvell.com>
> Cc: dev@dpdk.org; Ananyev, Konstantin <konstantin.ananyev@intel.com>; jerinj@marvell.com
> Subject: Re: [dpdk-dev] [PATCH v2 1/3] lib/librte_ip_frag: Remove PKT_TX_IP_CKSUM offload flags
> 
> 26/06/2019 23:10, Thomas Monjalon:
> > 18/05/2019 17:18, Ananyev, Konstantin:
> > >
> > > Hi,
> > >
> > > > Currently PKT_TX_IP_CKSUM is being set into mbuf->ol_flags
> > > > during fragmentation and reassemble operation implicitly.
> > > > Because of this, application is forced to use checksum offload
> > > > whether it is supported by platform or not.
> > > >
> > > > Also documentation does not provide any expected value of ol_flags
> > > > in returned mbuf (reassembled or fragmented) so application will never
> > > > come to know that which offloads are enabled. So transmission may be failed
> > > > for the platforms which does not support checksum offload.
> > > >
> > > > Also, IPv6 does not contain any checksum field in header so setting
> > > > mbuf->ol_flags with PKT_TX_IP_CKSUM is itself invalid.
> > > >
> > > > So removing mentioned flag from the library.
> > >
> > > As there is a change in public API behavior, I think it deserves update in release notes.
> > > Apart from that:
> > > Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> >
> > Is it safe to do this behaviour change?
> > You did not reply about updating the release notes.
> > Why did you drop this patch in v3?
> 
> No reply?
> May I consider this series won't go in 19.08 release?


I think we better push it into 19.08.
It is a real problem, I hit it myself while working on adding reassemble/fragmentation
support into ipsec-secgw.
Sunil, can you prepare new version as asked by Thomas?
Konstantin