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    SubjectRe: [PATCH 0/3] macvlan: add vepa and bridge mode
    On Tue, 17 Nov 2009 22:39:07 +0000
    Arnd Bergmann <arnd@arndb.de> wrote:

    > This is based on an earlier patch from Eric Biederman adding
    > forwarding between macvlans. I extended his approach to
    > allow the administrator to choose the mode for each macvlan,
    > and to implement a functional VEPA between macvlan.
    >
    > Still missing from this is support for communication between
    > the lower device that the macvlans are based on. This would
    > be extremely useful but as others have found out before me
    > requires significant changes not only to macvlan but also
    > to the common transmit path.

    If this means that the "children" macvlans can't communicate with their
    "parent" interface as though they were all attached to the same virtual
    ethernet segment, I think that is a reasonable limitation. On other
    networking equipment I've used, the moment "sub-interfaces"
    are created, their parent interface can't be used for any
    communications, only for setting link related parameters e.g. for
    ethernet interfaces, speed and duplex etc.

    >
    > I've seen one panic during testing this that I still need
    > to track down, but it generally does what is advertised.
    > I've tested VEPA operation with the hairpin support
    > added to the bridge driver by Anna Fischer.
    >
    > My current plan is to submit this for inclusion in 2.6.33
    > when people are happy with it and I tracked down any
    > remaining bugs, and possibly to do the communication with
    > the lower device one release later.
    >
    > Arnd <><
    >
    > ---
    >
    > Arnd Bergmann (3):
    > macvlan: implement VEPA and private mode
    > macvlan: export macvlan mode through netlink
    > iplink: add macvlan options for bridge mode
    >
    > Eric Biederman (1):
    > macvlan: Reflect macvlan packets meant for other macvlan devices
    >
    > linux/drivers/net/macvlan.c | 170 +++++++++++++++++++++++++++++++++-----
    > linux/include/linux/if_link.h | 15 +++
    > 2 files changed, 161 insertions(+), 24 deletions(-)
    >
    > iproute2/include/linux/if_link.h | 15 +++
    > iproute2/ip/Makefile | 3 +-
    > iproute2/ip/iplink_macvlan.c | 93 ++++++++++++++++++
    > 3 files changed, 110 insertions(+), 1 deletions(-)
    > create mode 100644 ip/iplink_macvlan.c
    > --
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