[PATCH net-next v13 0/3] xen networking: add XDP support to xen-netfront

[Denis Kirjanov <kda@linux-powerpc.org>]

The first patch adds a new extra type to enable proper synchronization
between an RX request/response pair.
The second patch implements BFP interface for xen-netfront.
The third patch enables extra space for XDP processing.

v13:
- fixed compilation due to previous rename

v12:
- xen-netback: rename netfront_xdp_headroom to xdp_headroom

v11:
- add the new headroom constant to netif.h
- xenbus_scanf check
- lock a bulk of puckets in xennet_xdp_xmit()

v10:
- add a new xen_netif_extra_info type to enable proper synchronization
 between an RX request/response pair.
- order local variable declarations

v9:
- assign an xdp program before switching to Reconfiguring
- minor cleanups
- address checkpatch issues

v8:
- add PAGE_POOL config dependency
- keep the state of XDP processing in netfront_xdp_enabled
- fixed allocator type in xdp_rxq_info_reg_mem_model()
- minor cleanups in xen-netback

v7:
- use page_pool_dev_alloc_pages() on page allocation
- remove the leftover break statement from netback_changed

v6:
- added the missing SOB line
- fixed subject

v5:
- split netfront/netback changes
- added a sync point between backend/frontend on switching to XDP
- added pagepool API

v4:
- added verbose patch descriprion
- don't expose the XDP headroom offset to the domU guest
- add a modparam to netback to toggle XDP offset
- don't process jumbo frames for now

v3:
- added XDP_TX support (tested with xdping echoserver)
- added XDP_REDIRECT support (tested with modified xdp_redirect_kern)
- moved xdp negotiation to xen-netback

v2:
- avoid data copying while passing to XDP
- tell xen-netback that we need the headroom space

Denis Kirjanov (3):
  xen: netif.h: add a new extra type for XDP
  xen networking: add basic XDP support for xen-netfront
  xen networking: add XDP offset adjustment to xen-netback

 drivers/net/Kconfig                 |   1 +
 drivers/net/xen-netback/common.h    |   4 +
 drivers/net/xen-netback/interface.c |   2 +
 drivers/net/xen-netback/netback.c   |   7 +
 drivers/net/xen-netback/rx.c        |  15 +-
 drivers/net/xen-netback/xenbus.c    |  34 ++++
 drivers/net/xen-netfront.c          | 337 ++++++++++++++++++++++++++++++++++--
 include/xen/interface/io/netif.h    |  20 ++-
 8 files changed, 408 insertions(+), 12 deletions(-)

-- 
1.8.3.1