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2015-10-05net: use sk_fullsock() in __netdev_pick_tx()Eric Dumazet2-0/+2
SYN_RECV & TIMEWAIT sockets are not full blown, they do not have a sk_dst_cache pointer. Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-05ipv6: inet6_sk() should use sk_fullsock()Eric Dumazet1-2/+2
SYN_RECV & TIMEWAIT sockets are not full blown, they do not have a pinet6 pointer. Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-05inet: ip_skb_dst_mtu() should use sk_fullsock()Eric Dumazet1-3/+6
SYN_RECV & TIMEWAIT sockets are not full blown, do not even try to call ip_sk_use_pmtu() on them. Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-05tcp: fix fastopen races vs lockless listenerEric Dumazet2-20/+12
There are multiple races that need fixes : 1) skb_get() + queue skb + kfree_skb() is racy An accept() can be done on another cpu, data consumed immediately. tcp_recvmsg() uses __kfree_skb() as it is assumed all skb found in socket receive queue are private. Then the kfree_skb() in tcp_rcv_state_process() uses an already freed skb 2) tcp_reqsk_record_syn() needs to be done before tcp_try_fastopen() for the same reasons. 3) We want to send the SYNACK before queueing child into accept queue, otherwise we might reintroduce the ooo issue fixed in commit 7c85af881044 ("tcp: avoid reorders for TFO passive connections") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for default_pvidNikolay Aleksandrov4-8/+21
Add IFLA_BR_VLAN_DEFAULT_PVID to allow setting/getting bridge's default_pvid via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for netfilter tables configNikolay Aleksandrov2-1/+39
Add support to allow getting/setting netfilter tables settings. Currently these are IFLA_BR_NF_CALL_IPTABLES, IFLA_BR_NF_CALL_IP6TABLES and IFLA_BR_NF_CALL_ARPTABLES. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for igmp's intervalsNikolay Aleksandrov2-1/+75
Add support to set/get all of the igmp's configurable intervals via netlink. These currently are: IFLA_BR_MCAST_LAST_MEMBER_INTVL IFLA_BR_MCAST_MEMBERSHIP_INTVL IFLA_BR_MCAST_QUERIER_INTVL IFLA_BR_MCAST_QUERY_INTVL IFLA_BR_MCAST_QUERY_RESPONSE_INTVL IFLA_BR_MCAST_STARTUP_QUERY_INTVL Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_startup_query_countNikolay Aleksandrov2-6/+17
Add IFLA_BR_MCAST_STARTUP_QUERY_CNT to allow setting/getting br->multicast_startup_query_count via netlink. Also align the ifla comments. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_last_member_countNikolay Aleksandrov2-1/+12
Add IFLA_BR_MCAST_LAST_MEMBER_CNT to allow setting/getting br->multicast_last_member_count via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for igmp's hash_maxNikolay Aleksandrov2-1/+13
Add IFLA_BR_MCAST_HASH_MAX to allow setting/getting br->hash_max via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for igmp's hash_elasticityNikolay Aleksandrov2-1/+12
Add IFLA_BR_MCAST_HASH_ELASTICITY to allow setting/getting br->hash_elasticity via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_querierNikolay Aleksandrov2-1/+13
Add IFLA_BR_MCAST_QUERIER to allow setting/getting br->multicast_querier via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_query_use_ifaddrNikolay Aleksandrov2-1/+13
Add IFLA_BR_MCAST_QUERY_USE_IFADDR to allow setting/getting br->multicast_query_use_ifaddr via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_snoopingNikolay Aleksandrov2-1/+13
Add IFLA_BR_MCAST_SNOOPING to allow enabling/disabling multicast snooping via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add support for multicast_routerNikolay Aleksandrov2-0/+20
Add IFLA_BR_MCAST_ROUTER to allow setting and retrieving br->multicast_router when igmp snooping is enabled. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add fdb flushNikolay Aleksandrov2-0/+4
Simple attribute that flushes the bridge's fdb. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add group_addr supportNikolay Aleksandrov2-1/+25
Add IFLA_BR_GROUP_ADDR attribute to allow setting and retrieving the group_addr via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export all timersNikolay Aleksandrov2-1/+19
Export the following bridge timers (also exported via sysfs): IFLA_BR_HELLO_TIMER, IFLA_BR_TCN_TIMER, IFLA_BR_TOPOLOGY_CHANGE_TIMER, IFLA_BR_GC_TIMER via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export topology_change and topology_change_detectedNikolay Aleksandrov2-1/+8
Add IFLA_BR_TOPOLOGY_CHANGE and IFLA_BR_TOPOLOGY_CHANGE_DETECTED and export them via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export root path costNikolay Aleksandrov2-1/+4
Add IFLA_BR_ROOT_PATH_COST and export it via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export root portNikolay Aleksandrov2-1/+4
Add IFLA_BR_ROOT_PORT and export it via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export bridge idNikolay Aleksandrov2-2/+8
Add IFLA_BR_BRIDGE_ID and export br->bridge_id via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export root idNikolay Aleksandrov2-1/+14
Add IFLA_BR_ROOT_ID and export br->designated_root via netlink. For this purpose add struct ifla_bridge_id that would represent struct bridge_id. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add group_fwd_mask supportNikolay Aleksandrov2-1/+14
Add IFLA_BR_GROUP_FWD_MASK attribute to allow setting and retrieving the group_fwd_mask via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use br_vlan_should_use to simplify __vlan_add/delNikolay Aleksandrov2-23/+15
The checks that lead to num_vlans change are always what br_vlan_should_use checks for, namely if the vlan is only a context or not and depending on that it's either not counted or counted as a real/used vlan respectively. Also give better explanation in br_vlan_should_use's comment. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: drop master_flags from __vlan_addNikolay Aleksandrov1-4/+2
There's only one user now and we can include the flag directly. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use br_vlan_(get|put)_master to deal with refcountsNikolay Aleksandrov1-17/+39
Introduce br_vlan_(get|put)_master which take a reference (or create the master vlan first if it didn't exist) and drop a reference respectively. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use rcu list for the ordered vlan listNikolay Aleksandrov2-4/+10
When I did the conversion to rhashtable I missed the required locking of one important user of the vlan list - br_get_link_af_size_filtered() which is called: br_ifinfo_notify() -> br_nlmsg_size() -> br_get_link_af_size_filtered() and the notifications can be sent without holding rtnl. Before this conversion the function relied on using rcu and since we already use rcu to destroy the vlans, we can simply migrate the list to use the rcu helpers. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: add SLAB_DESTROY_BY_RCU flag for request socketsEric Dumazet2-2/+4
Before letting request sockets being put in TCP/DCCP regular ehash table, we need to add either : - SLAB_DESTROY_BY_RCU flag to their kmem_cache - add RCU grace period before freeing them. Since we carefully respected the SLAB_DESTROY_BY_RCU protocol like ESTABLISH and TIMEWAIT sockets, use it here. req_prot_init() being only used by TCP and DCCP, I did not add a new slab_flags into their rsk_prot, but reuse prot->slab_flags Since all reqsk_alloc() users are correctly dealing with a failure, add the __GFP_NOWARN flag to avoid traces under pressure. Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ravb: Add support for r8a7795 SoCKazuya Mizuguchi2-8/+62
This patch supports the r8a7795 SoC by: - Using two interrupts + One for E-MAC + One for everything else + Both can be handled by the existing common interrupt handler, which affords a simpler update to support the new SoC. In future some consideration may be given to implementing multiple interrupt handlers - Limiting the phy speed to 100Mbit/s for the new SoC; at this time it is not clear how this restriction may be lifted but I hope it will be possible as more information comes to light Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com> [horms: reworked] Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ravb: Document binding for r8a7795 SoCKazuya Mizuguchi1-7/+62
This patch updates the ravb binding to support the r8a7795 SoC by: - Adding a compat string for the new hardware - Adding 25 named interrupts to binding for the new SoC; older SoCs continue to use a single multiplexed interrupt The example is also updated to reflect the r8a7795 as this is the more complex case. Based on work by Kazuya Mizuguchi and others. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ravb: Provide dev parameter to DMA APIKazuya Mizuguchi1-19/+19
This patch is in preparation for using this driver on arm64 where the implementation of __dma_alloc_coherent fails if a device parameter is not provided. Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Masaru Nagai <masaru.nagai.vx@renesas.com> [horms: squashed into a single patch] Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03phylib: Add phy_set_max_speed helperSimon Horman2-19/+41
Add a helper to allow ethernet drivers to limit the speed of a phy (that they are attached to). This mainly involves factoring out the business-end of of_set_phy_supported() and exporting a new symbol. This code seems to be open coded in several places, in several different variants. It is is envisaged that this will be used in situations where setting the "max-speed" property in DT is not appropriate, e.g. because the maximum speed is not a property of the phy hardware. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03sched, bpf: make skb->priority writableDaniel Borkmann1-2/+7
{cls,act}_bpf can now set the skb->priority from an eBPF program based on various critera, so that for example classful qdiscs like multiq can update the skb's priority during enqueue time and further push it down into subsequent qdiscs. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03sched, bpf: add helper for retrieving routing realmsDaniel Borkmann5-3/+39
Using routing realms as part of the classifier is quite useful, it can be viewed as a tag for one or multiple routing entries (think of an analogy to net_cls cgroup for processes), set by user space routing daemons or via iproute2 as an indicator for traffic classifiers and later on processed in the eBPF program. Unlike actions, the classifier can inspect device flags and enable netif_keep_dst() if necessary. tc actions don't have that possibility, but in case people know what they are doing, it can be used from there as well (e.g. via devs that must keep dsts by design anyway). If a realm is set, the handler returns the non-zero realm. User space can set the full 32bit realm for the dst. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ebpf: migrate bpf_prog's flags to bitfieldDaniel Borkmann11-12/+18
As we need to add further flags to the bpf_prog structure, lets migrate both bools to a bitfield representation. The size of the base structure (excluding insns) remains unchanged at 40 bytes. Add also tags for the kmemchecker, so that it doesn't throw false positives. Even in case gcc would generate suboptimal code, it's not being accessed in performance critical paths. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: push object ID back to object structureJiri Pirko6-56/+45
Suggested-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: bring back switchdev_obj and use it as a generic object paramJiri Pirko6-62/+109
Replace "void *obj" with a generic structure. Introduce couple of helpers along that. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename switchdev_obj_fdb to switchdev_obj_port_fdbJiri Pirko5-12/+12
Make the struct name in sync with object id name. Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename switchdev_obj_vlan to switchdev_obj_port_vlanJiri Pirko5-12/+12
Make the struct name in sync with object id name. Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename SWITCHDEV_ATTR_* enum values to SWITCHDEV_ATTR_ID_*Jiri Pirko9-25/+26
To be aligned with obj. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename SWITCHDEV_OBJ_* enum values to SWITCHDEV_OBJ_ID_*Jiri Pirko7-35/+37
Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: do not lock listener to process SYN packetsEric Dumazet2-4/+18
Everything should now be ready to finally allow SYN packets processing without holding listener lock. Tested: 3.5 Mpps SYNFLOOD. Plenty of cpu cycles available. Next bottleneck is the refcount taken on listener, that could be avoided if we remove SLAB_DESTROY_BY_RCU strict semantic for listeners, and use regular RCU. 13.18% [kernel] [k] __inet_lookup_listener 9.61% [kernel] [k] tcp_conn_request 8.16% [kernel] [k] sha_transform 5.30% [kernel] [k] inet_reqsk_alloc 4.22% [kernel] [k] sock_put 3.74% [kernel] [k] tcp_make_synack 2.88% [kernel] [k] ipt_do_table 2.56% [kernel] [k] memcpy_erms 2.53% [kernel] [k] sock_wfree 2.40% [kernel] [k] tcp_v4_rcv 2.08% [kernel] [k] fib_table_lookup 1.84% [kernel] [k] tcp_openreq_init_rwin Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: add a reschedule point in inet_csk_listen_stop()Eric Dumazet1-0/+1
If a listener with thousands of children in accept queue is dismantled, it can take a while to close all of them. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: remove max_qlen_logEric Dumazet4-18/+6
This control variable was set at first listen(fd, backlog) call, but not updated if application tried to increase or decrease backlog. It made sense at the time listener had a non resizeable hash table. Also rounding to powers of two was not very friendly. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: remove struct listen_sockEric Dumazet3-76/+11
It is enough to check listener sk_state, no need for an extra condition. max_qlen_log can be moved into struct request_sock_queue We can remove syn_wait_lock and the alignment it enforced. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: attach SYNACK messages to request sockets instead of listenerEric Dumazet8-32/+47
If a listen backlog is very big (to avoid syncookies), then the listener sk->sk_wmem_alloc is the main source of false sharing, as we need to touch it twice per SYNACK re-transmit and TX completion. (One SYN packet takes listener lock once, but up to 6 SYNACK are generated) By attaching the skb to the request socket, we remove this source of contention. Tested: listen(fd, 10485760); // single listener (no SO_REUSEPORT) 16 RX/TX queue NIC Sustain a SYNFLOOD attack of ~320,000 SYN per second, Sending ~1,400,000 SYNACK per second. Perf profiles now show listener spinlock being next bottleneck. 20.29% [kernel] [k] queued_spin_lock_slowpath 10.06% [kernel] [k] __inet_lookup_established 5.12% [kernel] [k] reqsk_timer_handler 3.22% [kernel] [k] get_next_timer_interrupt 3.00% [kernel] [k] tcp_make_synack 2.77% [kernel] [k] ipt_do_table 2.70% [kernel] [k] run_timer_softirq 2.50% [kernel] [k] ip_finish_output 2.04% [kernel] [k] cascade Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ipv6: remove obsolete inet6 functionsEric Dumazet1-9/+0
inet6_csk_search_req() and inet6_csk_reqsk_queue_hash_add() no longer exist. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: shrink struct listen_sockEric Dumazet2-14/+3
We no longer use hash_rnd, nr_table_entries and syn_table[] For a listener with a backlog of 10 millions sockets, this saves 80 MBytes of vmalloced memory. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: install syn_recv requests into ehash tableEric Dumazet15-501/+160
In this patch, we insert request sockets into TCP/DCCP regular ehash table (where ESTABLISHED and TIMEWAIT sockets are) instead of using the per listener hash table. ACK packets find SYN_RECV pseudo sockets without having to find and lock the listener. In nominal conditions, this halves pressure on listener lock. Note that this will allow for SO_REUSEPORT refinements, so that we can select a listener using cpu/numa affinities instead of the prior 'consistent hash', since only SYN packets will apply this selection logic. We will shrink listen_sock in the following patch to ease code review. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ying Cai <ycai@google.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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