Re: [PATCH net-next v2 06/12] net: vxlan: make vxlan_set_mac() return drop reasons

[Menglong Dong]

On Fri, Aug 30, 2024 at 11:31 PM Simon Horman <horms@xxxxxxxxxx> wrote:
>
> On Fri, Aug 30, 2024 at 09:59:55AM +0800, Menglong Dong wrote:
> > Change the return type of vxlan_set_mac() from bool to enum
> > skb_drop_reason. In this commit, two drop reasons are introduced:
> >
> >   VXLAN_DROP_INVALID_SMAC
> >   VXLAN_DROP_ENTRY_EXISTS
> >
> > To make it easier to document the reasons in drivers/net/vxlan/drop.h,
> > we don't define the enum vxlan_drop_reason with the macro
> > VXLAN_DROP_REASONS(), but hand by hand.
> >
> > Signed-off-by: Menglong Dong <dongml2@xxxxxxxxxxxxxxx>
> > ---
> >  drivers/net/vxlan/drop.h       |  9 +++++++++
> >  drivers/net/vxlan/vxlan_core.c | 12 ++++++------
> >  2 files changed, 15 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/net/vxlan/drop.h b/drivers/net/vxlan/drop.h
> > index 6bcc6894fbbd..876b4a9de92f 100644
> > --- a/drivers/net/vxlan/drop.h
> > +++ b/drivers/net/vxlan/drop.h
> > @@ -9,11 +9,20 @@
> >  #include <net/dropreason.h>
> >
> >  #define VXLAN_DROP_REASONS(R)                        \
> > +     R(VXLAN_DROP_INVALID_SMAC)              \
> > +     R(VXLAN_DROP_ENTRY_EXISTS)              \
> >       /* deliberate comment for trailing \ */
> >
> >  enum vxlan_drop_reason {
> >       __VXLAN_DROP_REASON = SKB_DROP_REASON_SUBSYS_VXLAN <<
> >                               SKB_DROP_REASON_SUBSYS_SHIFT,
> > +     /** @VXLAN_DROP_INVALID_SMAC: source mac is invalid */
> > +     VXLAN_DROP_INVALID_SMAC,
> > +     /**
> > +      * @VXLAN_DROP_ENTRY_EXISTS: trying to migrate a static entry or
> > +      * one pointing to a nexthop
>
> Maybe it is clearer to write: one -> an entry
>

Okay!

> > +      */
> > +     VXLAN_DROP_ENTRY_EXISTS,
> >  };
> >
> >  static inline void
>
> ...