[dpdk-dev] [PATCH v3 19/25] ether: Fix vlan strip/insert issue

[Ouyang, Changchun]

Hi huawei,

> -----Original Message-----
> From: Xie, Huawei
> Sent: Wednesday, February 4, 2015 6:54 PM
> To: Ouyang, Changchun; dev at dpdk.org
> Cc: stephen at networkplumber.org; Cao, Waterman; Xu, Qian Q
> Subject: Re: [PATCH v3 19/25] ether: Fix vlan strip/insert issue
> 
> On 1/29/2015 3:24 PM, Ouyang Changchun wrote:
> > Need swap the data from cpu to BE(big endian) for vlan-type.
> >
> > Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
> > ---
> > lib/librte_ether/rte_ether.h | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/lib/librte_ether/rte_ether.h
> > b/lib/librte_ether/rte_ether.h index 74f71c2..0797908 100644
> > --- a/lib/librte_ether/rte_ether.h
> > +++ b/lib/librte_ether/rte_ether.h
> > @@ -351,7 +351,7 @@ static inline int rte_vlan_strip(struct rte_mbuf *m)
> >     struct ether_hdr *eh
> >          = rte_pktmbuf_mtod(m, struct ether_hdr *);
> >
> > -    if (eh->ether_type != ETHER_TYPE_VLAN)
> > +    if (eh->ether_type != rte_cpu_to_be_16(ETHER_TYPE_VLAN))
> rte_be_to_cpu_16?

Eh->ether_type is in network byte order(big endian),
While  ETHER_TYPE_VLAN is host byte order(little endian on x86), so it need change into big endian.

> >         return -1;
> >
> >     struct vlan_hdr *vh = (struct vlan_hdr *)(eh + 1); @@ -401,7
> > +401,7 @@ static inline int rte_vlan_insert(struct rte_mbuf
> > **m)
> >         return -ENOSPC;
> >
> >     memmove(nh, oh, 2 * ETHER_ADDR_LEN);
> > -    nh->ether_type = ETHER_TYPE_VLAN;
> > +    nh->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
> rte_be_to_cpu_16?

Similar reason as above.

Thanks
Changchun