Respin of the zerocopy patches for the openvswitch upcall.
V5: - Removed padding requirement in user space
- Added OVS_DP_F_UNALIGNED flag let user space signal ability to
receive unaligned Netlink messages, fall back to linear copy
otherwise.
V4: - Daniel Borkmann pointed out that the style in skbuff.h has changed
in net-next, adapted to no longer using extern in headers.
V3: - Removed unneeded alignment of nlmsg_len after padding
V2: - Added skb_zerocopy_headlen() to calculate headroom of destination
buffer. This also takes care of the from->head_frag issue.
- Attribute alignment for frag_list case
- API documentation
- performance data for CHECKSUM_PARTIAL tx case
Thomas Graf (3):
net: Export skb_zerocopy() to zerocopy from one skb to another
openvswitch: Allow user space to announce ability to accept unaligned
Netlink messages
openvswitch: Use skb_zerocopy() for upcall
include/linux/skbuff.h | 3 ++
include/uapi/linux/openvswitch.h | 4 ++
net/core/skbuff.c | 85 ++++++++++++++++++++++++++++++++++++
net/netfilter/nfnetlink_queue_core.c | 59 ++-----------------------
net/openvswitch/datapath.c | 58 ++++++++++++++++--------
net/openvswitch/datapath.h | 2 +
6 files changed, 139 insertions(+), 72 deletions(-)
--
1.8.3.1
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