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2013-12-20tcp: autocork should not hold first packet in write queueEric Dumazet
Willem noticed a TCP_RR regression caused by TCP autocorking on a Mellanox test bed. MLX4_EN_TX_COAL_TIME is 16 us, which can be right above RTT between hosts. We can receive a ACK for a packet still in NIC TX ring buffer or in a softnet completion queue. Fix this by always pushing the skb if it is at the head of write queue. Also, as TX completion is lockless, it's safer to perform sk_wmem_alloc test after setting TSQ_THROTTLED. erd:~# MIB="MIN_LATENCY,MEAN_LATENCY,MAX_LATENCY,P99_LATENCY,STDDEV_LATENCY" erd:~# ./netperf -H remote -t TCP_RR -- -o $MIB | tail -n 1 (repeat 3 times) Before patch : 18,1049.87,41004,39631,6295.47 17,239.52,40804,48,2912.79 18,348.40,40877,54,3573.39 After patch : 18,22.84,4606,38,16.39 17,21.56,2871,36,13.51 17,22.46,2705,37,11.83 Reported-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes: f54b311142a9 ("tcp: auto corking") Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-20net_sched: fix regression in tc_action_opsEric Dumazet
list_for_each_entry(a, &act_base, head) doesn't exit with a = NULL if we reached the end of the list. tcf_unregister_action(), tc_lookup_action_n() and tc_lookup_action() need fixes. Remove tc_lookup_action_id() as its unused and not worth 'fixing' Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes: 1f747c26c48b ("net_sched: convert tc_action_ops to use struct list_head") Cc: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-20net_sched: fix a regression in tcf_proto_lookup_ops()Eric Dumazet
list_for_each_entry(t, &tcf_proto_base, head) doesn't exit with t = NULL if we reached the end of the list. Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes: 3627287463b4 ("net_sched: convert tcf_proto_ops to use struct list_head") Cc: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-20net_sched: fix a regression in tc actionsWANG Cong
This patch fixes: 1) pass mask rather than size to tcf_hashinfo_init() 2) the cleanup should be in reversed order in mirred_cleanup_module() Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Fixes: 369ba56787d7469c0afd ("net_sched: init struct tcf_hashinfo at register time") Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-20Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
2013-12-20netfilter: nf_ct_timestamp: Fix BUG_ON after netns deletionHelmut Schaa
When having nf_conntrack_timestamp enabled deleting a netns can lead to the following BUG being triggered: [63836.660000] Kernel bug detected[#1]: [63836.660000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.18 #14 [63836.660000] task: 802d9420 ti: 802d2000 task.ti: 802d2000 [63836.660000] $ 0 : 00000000 00000000 00000000 00000000 [63836.660000] $ 4 : 00000001 00000004 00000020 00000020 [63836.660000] $ 8 : 00000000 80064910 00000000 00000000 [63836.660000] $12 : 0bff0002 00000001 00000000 0a0a0abe [63836.660000] $16 : 802e70a0 85f29d80 00000000 00000004 [63836.660000] $20 : 85fb62a0 00000002 802d3bc0 85fb62a0 [63836.660000] $24 : 00000000 87138110 [63836.660000] $28 : 802d2000 802d3b40 00000014 871327cc [63836.660000] Hi : 000005ff [63836.660000] Lo : f2edd000 [63836.660000] epc : 87138794 __nf_ct_ext_add_length+0xe8/0x1ec [nf_conntrack] [63836.660000] Not tainted [63836.660000] ra : 871327cc nf_conntrack_in+0x31c/0x7b8 [nf_conntrack] [63836.660000] Status: 1100d403 KERNEL EXL IE [63836.660000] Cause : 00800034 [63836.660000] PrId : 0001974c (MIPS 74Kc) [63836.660000] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_quota xt_policy xt_pkttype xt_owner xt_nat xt_multiport xt_mark xh [63836.660000] Process swapper (pid: 0, threadinfo=802d2000, task=802d9420, tls=00000000) [63836.660000] Stack : 802e70a0 871323d4 00000005 87080234 802e70a0 86d2a840 00000000 00000000 [63836.660000] Call Trace: [63836.660000] [<87138794>] __nf_ct_ext_add_length+0xe8/0x1ec [nf_conntrack] [63836.660000] [<871327cc>] nf_conntrack_in+0x31c/0x7b8 [nf_conntrack] [63836.660000] [<801ff63c>] nf_iterate+0x90/0xec [63836.660000] [<801ff730>] nf_hook_slow+0x98/0x164 [63836.660000] [<80205968>] ip_rcv+0x3e8/0x40c [63836.660000] [<801d9754>] __netif_receive_skb_core+0x624/0x6a4 [63836.660000] [<801da124>] process_backlog+0xa4/0x16c [63836.660000] [<801d9bb4>] net_rx_action+0x10c/0x1e0 [63836.660000] [<8007c5a4>] __do_softirq+0xd0/0x1bc [63836.660000] [<8007c730>] do_softirq+0x48/0x68 [63836.660000] [<8007c964>] irq_exit+0x54/0x70 [63836.660000] [<80060830>] ret_from_irq+0x0/0x4 [63836.660000] [<8006a9f8>] r4k_wait_irqoff+0x18/0x1c [63836.660000] [<8009cfb8>] cpu_startup_entry+0xa4/0x104 [63836.660000] [<802eb918>] start_kernel+0x394/0x3ac [63836.660000] [63836.660000] Code: 00821021 8c420000 2c440001 <00040336> 90440011 92350010 90560010 2485ffff 02a5a821 [63837.040000] ---[ end trace ebf660c3ce3b55e7 ]--- [63837.050000] Kernel panic - not syncing: Fatal exception in interrupt [63837.050000] Rebooting in 3 seconds.. Fix this by not unregistering the conntrack extension in the per-netns cleanup code. This bug was introduced in (73f4001 netfilter: nf_ct_tstamp: move initialization out of pernet_operations). Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-12-20netfilter: nft_exthdr: call ipv6_find_hdr() with explicitly initialized offsetDaniel Borkmann
In nft's nft_exthdr_eval() routine we process IPv6 extension header through invoking ipv6_find_hdr(), but we call it with an uninitialized offset variable that contains some stack value. In ipv6_find_hdr() we then test if the value of offset != 0 and call skb_header_pointer() on that offset in order to map struct ipv6hdr into it. Fix it up by initializing offset to 0 as it was probably intended to be. Fixes: 96518518cc41 ("netfilter: add nftables") Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-12-20netfilter: ctnetlink: honor CTA_MARK_MASK when setting ctmarkFlorian Westphal
Useful to only set a particular range of the conntrack mark while leaving exisiting parts of the value alone, e.g. when setting conntrack marks via NFQUEUE. Follows same scheme as MARK/CONNMARK targets, i.e. the mask defines those bits that should be altered. No mask is equal to '~0', ie. the old value is replaced by new one. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-12-20netfilter: avoid get_random_bytes callsFlorian Westphal
All these users need an initial seed value for jhash, prandom is perfectly fine. This avoids draining the entropy pool where its not strictly required. nfnetlink_log did not use the random value at all. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-12-19bridge: change the position of '{' to the pre linetanxiaojun
That open brace { should be on the previous line. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19bridge: change "foo* bar" to "foo *bar"tanxiaojun
"foo * bar" should be "foo *bar". Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19bridge: add space before '(/{', after ',', etc.tanxiaojun
Spaces required before the open parenthesis '(', before the open brace '{', after that ',' and around that '?/:'. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19bridge: remove unnecessary parenthesestanxiaojun
Return is not a function, parentheses are not required. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19bridge: remove unnecessary condition judgmenttanxiaojun
Because err is always negative, remove unnecessary condition judgment. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19dccp: catch failed request_module call in dccp_probe initWang Weidong
Check the return value of request_module during dccp_probe initialisation, bail out if that call fails. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Wang Weidong <wangweidong1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates This series contains updates to net, ixgbe and e1000e. David provides compiler fixes for e1000e. Don provides a fix for ixgbe to resolve a compile warning. John provides a fix to net where it is useful to be able to walk all upper devices when bringing a device online where the RTNL lock is held. In this case, it is safe to walk the all_adj_list because the RTNL lock is used to protect the write side as well. This patch adds a check to see if the RTNL lock is held before throwing a warning in netdev_all_upper_get_next_dev_rcu(). ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19rps: NUMA flow limit allocationsEric Dumazet
Given we allocate memory for each cpu, we can do this using NUMA affinities, instead of using NUMA policies of the process changing flow_limit_cpu_bitmap value. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2013-12-19 1) Use the user supplied policy index instead of a generated one if present. From Fan Du. 2) Make xfrm migration namespace aware. From Fan Du. 3) Make the xfrm state and policy locks namespace aware. From Fan Du. 4) Remove ancient sleeping when the SA is in acquire state, we now queue packets to the policy instead. This replaces the sleeping code. 5) Remove FLOWI_FLAG_CAN_SLEEP. This was used to notify xfrm about the posibility to sleep. The sleeping code is gone, so remove it. 6) Check user specified spi for IPComp. Thr spi for IPcomp is only 16 bit wide, so check for a valid value. From Fan Du. 7) Export verify_userspi_info to check for valid user supplied spi ranges with pfkey and netlink. From Fan Du. 8) RFC3173 states that if the total size of a compressed payload and the IPComp header is not smaller than the size of the original payload, the IP datagram must be sent in the original non-compressed form. These packets are dropped by the inbound policy check because they are not transformed. Document the need to set 'level use' for IPcomp to receive such packets anyway. From Fan Du. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19ipv6: always set the new created dst's from in ip6_rt_copyLi RongQing
ip6_rt_copy only sets dst.from if ort has flag RTF_ADDRCONF and RTF_DEFAULT. but the prefix routes which did get installed by hand locally can have an expiration, and no any flag combination which can ensure a potential from does never expire, so we should always set the new created dst's from. This also fixes the new created dst is always expired since the ort, which is created by RA, maybe has RTF_EXPIRES and RTF_ADDRCONF, but no RTF_DEFAULT. Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org> CC: Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19sch_cbq: remove unnecessary null pointer checkYang Yingliang
It already has a NULL pointer check of rtab in qdisc_put_rtab(). Remove the check outside of qdisc_put_rtab(). Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19act_police: remove unnecessary null pointer checkYang Yingliang
It already has a NULL pointer check of rtab in qdisc_put_rtab(). Remove the check outside of qdisc_put_rtab(). Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19net: inet_diag: zero out uninitialized idiag_{src,dst} fieldsDaniel Borkmann
Jakub reported while working with nlmon netlink sniffer that parts of the inet_diag_sockid are not initialized when r->idiag_family != AF_INET6. That is, fields of r->id.idiag_src[1 ... 3], r->id.idiag_dst[1 ... 3]. In fact, it seems that we can leak 6 * sizeof(u32) byte of kernel [slab] memory through this. At least, in udp_dump_one(), we allocate a skb in ... rep = nlmsg_new(sizeof(struct inet_diag_msg) + ..., GFP_KERNEL); ... and then pass that to inet_sk_diag_fill() that puts the whole struct inet_diag_msg into the skb, where we only fill out r->id.idiag_src[0], r->id.idiag_dst[0] and leave the rest untouched: r->id.idiag_src[0] = inet->inet_rcv_saddr; r->id.idiag_dst[0] = inet->inet_daddr; struct inet_diag_msg embeds struct inet_diag_sockid that is correctly / fully filled out in IPv6 case, but for IPv4 not. So just zero them out by using plain memset (for this little amount of bytes it's probably not worth the extra check for idiag_family == AF_INET). Similarly, fix also other places where we fill that out. Reported-by: Jakub Zawadzki <darkjames-ws@darkjames.pl> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19net-qdisc-hhf: Heavy-Hitter Filter (HHF) qdiscTerry Lam
This patch implements the first size-based qdisc that attempts to differentiate between small flows and heavy-hitters. The goal is to catch the heavy-hitters and move them to a separate queue with less priority so that bulk traffic does not affect the latency of critical traffic. Currently "less priority" means less weight (2:1 in particular) in a Weighted Deficit Round Robin (WDRR) scheduler. In essence, this patch addresses the "delay-bloat" problem due to bloated buffers. In some systems, large queues may be necessary for obtaining CPU efficiency, or due to the presence of unresponsive traffic like UDP, or just a large number of connections with each having a small amount of outstanding traffic. In these circumstances, HHF aims to reduce the HoL blocking for latency sensitive traffic, while not impacting the queues built up by bulk traffic. HHF can also be used in conjunction with other AQM mechanisms such as CoDel. To capture heavy-hitters, we implement the "multi-stage filter" design in the following paper: C. Estan and G. Varghese, "New Directions in Traffic Measurement and Accounting", in ACM SIGCOMM, 2002. Some configurable qdisc settings through 'tc': - hhf_reset_timeout: period to reset counter values in the multi-stage filter (default 40ms) - hhf_admit_bytes: threshold to classify heavy-hitters (default 128KB) - hhf_evict_timeout: threshold to evict idle heavy-hitters (default 1s) - hhf_non_hh_weight: Weighted Deficit Round Robin (WDRR) weight for non-heavy-hitters (default 2) - hh_flows_limit: max number of heavy-hitter flow entries (default 2048) Note that the ratio between hhf_admit_bytes and hhf_reset_timeout reflects the bandwidth of heavy-hitters that we attempt to capture (25Mbps with the above default settings). The false negative rate (heavy-hitter flows getting away unclassified) is zero by the design of the multi-stage filter algorithm. With 100 heavy-hitter flows, using four hashes and 4000 counters yields a false positive rate (non-heavy-hitters mistakenly classified as heavy-hitters) of less than 1e-4. Signed-off-by: Terry Lam <vtlam@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-19mac80211: Add support for QoS mappingKyeyoon Park
Implement set_qos_map() handler for mac80211 to enable QoS mapping functionality. Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com> Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19cfg80211: Add support for QoS mappingKyeyoon Park
This allows QoS mapping from external networks to be implemented as defined in IEEE Std 802.11-2012, 10.24.9. APs can use this to advertise DSCP ranges and exceptions for mapping frames to a specific UP over Wi-Fi. The payload of the QoS Map Set element (IEEE Std 802.11-2012, 8.4.2.97) is sent to the driver through the new NL80211_ATTR_QOS_MAP attribute to configure the local behavior either on the AP (based on local configuration) or on a station (based on information received from the AP). Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com> Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19treewide: Fix typos in printkMasanari Iida
Correct spelling typo in various part of kernel Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-12-19Merge branch 'master' into for-nextJiri Kosina
Sync with Linus' tree to be able to apply fixes on top of newer things in tree (efi-stub). Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-12-19nl80211: support vendor-specific eventsJohannes Berg
In addition to vendor-specific commands, also support vendor-specific events. These must be registered with cfg80211 before they can be used. They're also advertised in nl80211 in the wiphy information so that userspace knows can be expected. The events themselves are sent on a new multicast group called "vendor". Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19mac80211: add helper functions for tracking P2P NoA stateFelix Fietkau
Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19mac80211: fix iflist_mtx/mtx locking in radar detectionJohannes Berg
The scan code creates an iflist_mtx -> mtx locking dependency, and a few other places, notably radar detection, were creating the opposite dependency, causing lockdep to complain. As scan and radar detection are mutually exclusive, the deadlock can't really happen in practice, but it's still bad form. A similar issue exists in the monitor mode code, but this is only used by channel-context drivers right now and those have to have hardware scan, so that also can't happen. Still, fix these issues by making some of the channel context code require the mtx to be held rather than acquiring it, thus allowing the monitor/radar callers to keep the iflist_mtx->mtx lock ordering. While at it, also fix access to the local->scanning variable in the radar code, and document that radar_detect_enabled is now properly protected by the mtx. All this would now introduce an ABBA deadlock between the DFS work cancelling and local->mtx, so change the locking there a bit to not need to use cancel_delayed_work_sync() but be able to just use cancel_delayed_work(). The work is also safely stopped/removed when the interface is stopped, so no extra changes are needed. Reported-by: Kalle Valo <kvalo@qca.qualcomm.com> Tested-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19mac80211: remove unnecessary iflist_mtx lockingJohannes Berg
The radar detection code changed a few times, and due to the changes some iflist_mtx locking stayed in that isn't actually necessary - remove it. One version of the code needed it because an AP interface's VLAN list was changed to use this, but then we moved the list handling outside of the chanctx handling and thus the locking was no longer needed. Tested-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19mac80211: align struct ps_data.tim to unsigned longJoe Perches
Its address is used as an unsigned long *, so make sure that the tim u8 array is properly aligned. Signed-off-by: Joe Perches <joe@perches.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-18ipv6: sit: update mtu check to take care of gso packetsEric Dumazet
While testing my changes for TSO support in SIT devices, I was using sit0 tunnel which appears to include nopmtudisc flag. But using : ip tun add sittun mode sit remote $REMOTE_IPV4 local $LOCAL_IPV4 \ dev $IFACE We get a tunnel which rejects too long packets because of the mtu check which is not yet GSO aware. erd:~# ip tunnel sittun: ipv6/ip remote 10.246.17.84 local 10.246.17.83 ttl inherit 6rd-prefix 2002::/16 sit0: ipv6/ip remote any local any ttl 64 nopmtudisc 6rd-prefix 2002::/16 This patch is based on an excellent report from Michal Shmidt. In the future, we probably want to extend the MTU check to do the right thing for GSO packets... Fixes: ("61c1db7fae21 ipv6: sit: add GSO/TSO support") Reported-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Tested-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18bridge: spelling fixestanxiaojun
Fix spelling errors in bridge driver. Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18ipv6: pmtudisc setting not respected with UFO/CORKHannes Frederic Sowa
Sockets marked with IPV6_PMTUDISC_PROBE (or later IPV6_PMTUDISC_INTERFACE) don't respect this setting when the outgoing interface supports UFO. We had the same problem in IPv4, which was fixed in commit daba287b299ec7a2c61ae3a714920e90e8396ad5 ("ipv4: fix DO and PROBE pmtu mode regarding local fragmentation with UFO/CORK"). Also IPV6_DONTFRAG mode did not care about already corked data, thus it may generate a fragmented frame even if this socket option was specified. It also did not care about the length of the ipv6 header and possible options. In the error path allow the user to receive the pmtu notifications via both, rxpmtu method or error queue. The user may opted in for both, so deliver the notification to both error handlers (the handlers check if the error needs to be enqueued). Also report back consistent pmtu values when sending on an already cork-appended socket. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18ip_gre: fix msg_name parsing for recvfrom/recvmsgTimo Teräs
ipgre_header_parse() needs to parse the tunnel's ip header and it uses mac_header to locate the iphdr. This got broken when gre tunneling was refactored as mac_header is no longer updated to point to iphdr. Introduce skb_pop_mac_header() helper to do the mac_header assignment and use it in ipgre_rcv() to fix msg_name parsing. Bug introduced in commit c54419321455 (GRE: Refactor GRE tunneling code.) Cc: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Timo Teräs <timo.teras@iki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18ipv6: support IPV6_PMTU_INTERFACE on socketsHannes Frederic Sowa
IPV6_PMTU_INTERFACE is the same as IPV6_PMTU_PROBE for ipv6. Add it nontheless for symmetry with IPv4 sockets. Also drop incoming MTU information if this mode is enabled. The additional bit in ipv6_pinfo just eats in the padding behind the bitfield. There are no changes to the layout of the struct at all. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18ipv4: new ip_no_pmtu_disc mode to always discard incoming frag needed msgsHannes Frederic Sowa
This new mode discards all incoming fragmentation-needed notifications as I guess was originally intended with this knob. To not break backward compatibility too much, I only added a special case for mode 2 in the receiving path. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18inet: make no_pmtu_disc per namespace and kill ipv4_configHannes Frederic Sowa
The other field in ipv4_config, log_martians, was converted to a per-interface setting, so we can just remove the whole structure. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/ethernet/intel/i40e/i40e_main.c drivers/net/macvtap.c Both minor merge hassles, simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18Merge branch 'for-upstream' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
2013-12-18net_sched: convert tcf_proto_ops to use struct list_headWANG Cong
We don't need to maintain our own singly linked list code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: convert tc_action_ops to use struct list_headWANG Cong
We don't need to maintain our own singly linked list code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: convert tcf_hashinfo to hlist and use spinlockWANG Cong
So that we don't need to play with singly linked list, and since the code is not on hot path, we can use spinlock instead of rwlock. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: init struct tcf_hashinfo at register timeWANG Cong
It looks weird to store the lock out of the struct but still points to a static variable. Just move them into the struct. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: cls: refactor out struct tcf_ext_mapWANG Cong
These information can be saved in tcf_exts, and this will simplify the code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: act: use standard struct list_headWANG Cong
Currently actions are chained by a singly linked list, therefore it is a bit hard to add and remove a specific entry. Convert it to struct list_head so that in the latter patch we can remove an action without finding its head. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18net_sched: remove get_stats from tc_action_opsWANG Cong
It is not used. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18mac80211: make ieee80211_recalc_radar_chanctx staticJohannes Berg
The function is only used in one file, so move it up a bit to avoid forward declarations and make it static. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-18mac80211: fix checkpatch errorsWeilong Chen
Fix a number of different checkpatch errors. Signed-off-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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