| From: |
| Paolo Abeni <pabeni-AT-redhat.com> |
| To: |
| netdev-AT-vger.kernel.org |
| Subject: |
| [PATCH net-next 0/5] net: introduce noref sk |
| Date: |
| Wed, 20 Sep 2017 18:54:00 +0200 |
| Message-ID: |
| <cover.1505926196.git.pabeni@redhat.com> |
| Cc: |
| "David S. Miller" <davem-AT-davemloft.net>, Pablo Neira Ayuso <pablo-AT-netfilter.org>, Florian Westphal <fw-AT-strlen.de>, Eric Dumazet <edumazet-AT-google.com>, Hannes Frederic Sowa <hannes-AT-stressinduktion.org> |
This series introduce the infrastructure to store inside the skb a socket
pointer without carrying a refcount to the socket.
Such infrastructure is then used in the network receive path - and
specifically the early demux operation.
This allows the UDP early demux to perform a full lookup for UDP sockets,
with many benefits:
- the UDP early demux code is now much simpler
- the early demux does not hit any performance penalties in case of UDP hash
table collision - previously the early demux performed a partial, unsuccesful,
lookup
- early demux is now operational also for unconnected sockets.
This infrastrcture will be used in follow-up series to allow dst caching for
unconnected UDP sockets, and than to extend the same features to TCP listening
sockets.
Paolo Abeni (5):
net: add support for noref skb->sk
net: allow early demux to fetch noref socket
udp: do not touch socket refcount in early demux
net: add simple socket-like dst cache helpers
udp: perform full socket lookup in early demux
include/linux/skbuff.h | 30 +++++++++++++++
include/linux/udp.h | 2 +
include/net/dst.h | 12 ++++++
net/core/dst.c | 16 ++++++++
net/core/sock.c | 6 +++
net/ipv4/ip_input.c | 12 ++++++
net/ipv4/ipmr.c | 18 +++++++--
net/ipv4/netfilter/nf_dup_ipv4.c | 3 ++
net/ipv4/udp.c | 80 ++++++++++++++++------------------------
net/ipv6/ip6_input.c | 7 +++-
net/ipv6/netfilter/nf_dup_ipv6.c | 3 ++
net/ipv6/udp.c | 67 ++++++++++-----------------------
net/netfilter/nf_queue.c | 3 ++
13 files changed, 159 insertions(+), 100 deletions(-)
--
2.13.5
