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2014-06-30openvswitch: Use exact lookup for flow_get and flow_del.Alex Wang1-12/+11
Due to the race condition in userspace, there is chance that two overlapping megaflows could be installed in datapath. And this causes userspace unable to delete the less inclusive megaflow flow even after it timeout, since the flow_del logic will stop at the first match of masked flow. This commit fixes the bug by making the kernel flow_del and flow_get logic check all masks in that case. Introduced by 03f0d916a (openvswitch: Mega flow implementation). Signed-off-by: Alex Wang <alexw@nicira.com> Acked-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-06-29openvswitch: Fix tracking of flags seen in TCP flows.Ben Pfaff1-2/+2
Flow statistics need to take into account the TCP flags from the packet currently being processed (in 'key'), not the TCP flags matched by the flow found in the kernel flow table (in 'flow'). This bug made the Open vSwitch userspace fin_timeout action have no effect in many cases. This bug is introduced by commit 88d73f6c411ac2f0578 (openvswitch: Use TCP flags in the flow key for stats.) Reported-by: Len Gao <leng@vmware.com> Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Jarno Rajahalme <jrajahalme@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Simplify genetlink code.Pravin B Shelar1-95/+90
Following patch get rid of struct genl_family_and_ops which is redundant due to changes to struct genl_family. Signed-off-by: Kyle Mestery <mestery@noironetworks.com> Acked-by: Kyle Mestery <mestery@noironetworks.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Minimize ovs_flow_cmd_new|set critical sections.Jarno Rajahalme1-76/+116
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Split ovs_flow_cmd_new_or_set().Jarno Rajahalme1-44/+116
Following patch will be easier to reason about with separate ovs_flow_cmd_new() and ovs_flow_cmd_set() functions. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Minimize ovs_flow_cmd_del critical section.Jarno Rajahalme1-25/+28
ovs_flow_cmd_del() now allocates reply (if needed) after the flow has already been removed from the flow table. If the reply allocation fails, a netlink error is signaled with netlink_set_err(), as is already done in ovs_flow_cmd_new_or_set() in the similar situation. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Reduce locking requirements.Jarno Rajahalme1-25/+29
Reduce and clarify locking requirements for ovs_flow_cmd_alloc_info(), ovs_flow_cmd_fill_info() and ovs_flow_cmd_build_info(). A datapath pointer is available only when holding a lock. Change ovs_flow_cmd_fill_info() and ovs_flow_cmd_build_info() to take a dp_ifindex directly, rather than a datapath pointer that is then (only) used to get the dp_ifindex. This is useful, since the dp_ifindex is available even when the datapath pointer is not, both before and after taking a lock, which makes further critical section reduction possible. Make ovs_flow_cmd_alloc_info() take an 'acts' argument instead a 'flow' pointer. This allows some future patches to do the allocation before acquiring the flow pointer. The locking requirements after this patch are: ovs_flow_cmd_alloc_info(): May be called without locking, must not be called while holding the RCU read lock (due to memory allocation). If 'acts' belong to a flow in the flow table, however, then the caller must hold ovs_mutex. ovs_flow_cmd_fill_info(): Either ovs_mutex or RCU read lock must be held. ovs_flow_cmd_build_info(): This calls both of the above, so the caller must hold ovs_mutex. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Minimize dp and vport critical sections.Jarno Rajahalme1-108/+110
Move most memory allocations away from the ovs_mutex critical sections. vport allocations still happen while the lock is taken, as changing that would require major refactoring. Also, vports are created very rarely so it should not matter. Change ovs_dp_cmd_get() now only takes the rcu_read_lock(), rather than ovs_lock(), as nothing need to be changed. This was done by ovs_vport_cmd_get() already. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Build flow cmd netlink reply only if needed.Jarno Rajahalme1-22/+48
Use netlink_has_listeners() and NLM_F_ECHO flag to determine if a reply is needed or not for OVS_FLOW_CMD_NEW, OVS_FLOW_CMD_SET, or OVS_FLOW_CMD_DEL. Currently, OVS userspace does not request a reply for OVS_FLOW_CMD_NEW, but usually does for OVS_FLOW_CMD_DEL, as stats may have changed. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Clarify locking.Jarno Rajahalme1-6/+7
Remove unnecessary locking from functions that are always called with appropriate locking. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Thomas Graf <tgraf@redhat.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-22openvswitch: Avoid assigning a NULL pointer to flow actions.Jarno Rajahalme1-6/+8
Flow SET can accept an empty set of actions, with the intended semantics of leaving existing actions unmodified. This seems to have been brokin after OVS 1.7, as we have assigned the flow's actions pointer to NULL in this case, but we never check for the NULL pointer later on. This patch restores the intended behavior and documents it in the include/linux/openvswitch.h. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-05-16openvswitch: Remove 5-tuple optimization.Jarno Rajahalme1-6/+5
The 5-tuple optimization becomes unnecessary with a later per-NUMA node stats patch. Remove it first to make the changes easier to grasp. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+5
Conflicts: drivers/net/ethernet/marvell/mvneta.c The mvneta.c conflict is a case of overlapping changes, a conversion to devm_ioremap_resource() vs. a conversion to netdev_alloc_pcpu_stats. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-27core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errorsZoltan Kiss1-1/+5
skb_zerocopy can copy elements of the frags array between skbs, but it doesn't orphan them. Also, it doesn't handle errors, so this patch takes care of that as well, and modify the callers accordingly. skb_tx_error() is also added to the callers so they will signal the failed delivery towards the creator of the skb. Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-4/+5
Conflicts: Documentation/devicetree/bindings/net/micrel-ks8851.txt net/core/netpoll.c The net/core/netpoll.c conflict is a bug fix in 'net' happening to code which is completely removed in 'net-next'. In micrel-ks8851.txt we simply have overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irqEric W. Biederman1-2/+2
Replace the bh safe variant with the hard irq safe variant. We need a hard irq safe variant to deal with netpoll transmitting packets from hard irq context, and we need it in most if not all of the places using the bh safe variant. Except on 32bit uni-processor the code is exactly the same so don't bother with a bh variant, just have a hard irq safe variant that everyone can use. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-15openvswitch: Fix race.Jarno Rajahalme1-3/+4
ovs_vport_cmd_dump() did rcu_read_lock() only after getting the datapath, which could have been deleted in between. Resolved by taking rcu_read_lock() before the get_dp() call. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-02-15ovs: fix dp check in ovs_dp_reset_user_featuresJiri Pirko1-1/+1
This fixes crash when userspace does "ovs-dpctl add-dp dev" where dev is existing non-dp netdevice. Introduced by: commit 44da5ae5fbea4686f667dc854e5ea16814e44c59 "openvswitch: Drop user features if old user space attempted to create datapath" Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-02-15openvswitch: rename ->sync to ->syncpWANG Cong1-6/+6
Openvswitch defines u64_stats_sync as ->sync rather than ->syncp, so fails to compile with netdev_alloc_pcpu_stats(). So just rename it to ->syncp. Reported-by: kbuild test robot <fengguang.wu@intel.com> Fixes: 1c213bd24ad04f4430031 (net: introduce netdev_alloc_pcpu_stats() for drivers) Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-14net: introduce netdev_alloc_pcpu_stats() for driversWANG Cong1-7/+1
There are many drivers calling alloc_percpu() to allocate pcpu stats and then initializing ->syncp. So just introduce a helper function for them. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-04openvswitch: Suppress error messages on megaflow updatesAndy Zhou1-4/+1
With subfacets, we'd expect megaflow updates message to carry the original micro flow. If not, EINVAL is returned and kernel logs an error message. Now that the user space subfacet layer is removed, it is expected that flow updates can arrive with a micro flow other than the original. Change the return code to EEXIST and remove the kernel error log message. Reported-by: Ben Pfaff <blp@nicira.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-02-04openvswitch: Fix ovs_dp_cmd_msg_size()Daniele Di Proietto1-0/+1
commit 43d4be9cb55f3bac5253e9289996fd9d735531db (openvswitch: Allow user space to announce ability to accept unaligned Netlink messages) introduced OVS_DP_ATTR_USER_FEATURES netlink attribute in datapath responses, but the attribute size was not taken into account in ovs_dp_cmd_msg_size(). Signed-off-by: Daniele Di Proietto <daniele.di.proietto@gmail.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-02-04openvswitch: Fix kernel panic on ovs_flow_freeAndy Zhou1-3/+6
Both mega flow mask's reference counter and per flow table mask list should only be accessed when holding ovs_mutex() lock. However this is not true with ovs_flow_table_flush(). The patch fixes this bug. Reported-by: Joe Stringer <joestringer@nicira.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-02-04openvswitch: Pad OVS_PACKET_ATTR_PACKET if linear copy was performedThomas Graf1-0/+8
While the zerocopy method is correctly omitted if user space does not support unaligned Netlink messages. The attribute is still not padded correctly as skb_zerocopy() will not ensure padding and the attribute size is no longer pre calculated though nla_reserve() which ensured padding previously. This patch applies appropriate padding if a linear data copy was performed in skb_zerocopy(). Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Zoltan Kiss <zoltan.kiss@citrix.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06ovs: make functions localStephen Hemminger1-2/+2
Several functions and datastructures could be local Found with 'make namespacecheck' Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Compute checksum in skb_gso_segment() if neededThomas Graf1-1/+1
The copy & csum optimization is no longer present with zerocopy enabled. Compute the checksum in skb_gso_segment() directly by dropping the HW CSUM capability from the features passed in. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Use skb_zerocopy() for upcallThomas Graf1-8/+29
Use of skb_zerocopy() can avoid the expensive call to memcpy() when copying the packet data into the Netlink skb. Completes checksum through skb_checksum_help() if not already done in GSO segmentation. Zerocopy is only performed if user space supported unaligned Netlink messages. memory mapped netlink i/o is preferred over zerocopy if it is set up. Cost of upcall is significantly reduced from: + 7.48% vhost-8471 [k] memcpy + 5.57% ovs-vswitchd [k] memcpy + 2.81% vhost-8471 [k] csum_partial_copy_generic to: + 5.72% ovs-vswitchd [k] memcpy + 3.32% vhost-5153 [k] memcpy + 0.68% vhost-5153 [k] skb_zerocopy (megaflows disabled) Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Pass datapath into userspace queue functionsThomas Graf1-20/+14
Allows removing the net and dp_ifindex argument and simplify the code. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Drop user features if old user space attempted to create datapathThomas Graf1-0/+21
Drop user features if an outdated user space instance that does not understand the concept of user_features attempted to create a new datapath. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Allow user space to announce ability to accept unaligned ↵Thomas Graf1-0/+14
Netlink messages Signed-off-by: Thomas Graf <tgraf@suug.ch> Reviewed-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Per cpu flow stats.Pravin B Shelar1-34/+16
With mega flow implementation ovs flow can be shared between multiple CPUs which makes stats updates highly contended operation. This patch uses per-CPU stats in cases where a flow is likely to be shared (if there is a wildcard in the 5-tuple and therefore likely to be spread by RSS). In other situations, it uses the current strategy, saving memory and allocation time. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Enable memory mapped Netlink i/oThomas Graf1-27/+29
Use memory mapped Netlink i/o for all unicast openvswitch communication if a ring has been set up. Benchmark * pktgen -> ovs internal port * 5M pkts, 5M flows * 4 threads, 8 cores Before: Result: OK: 67418743(c67108212+d310530) usec, 5000000 (9000byte,0frags) 74163pps 5339Mb/sec (5339736000bps) errors: 0 + 2.98% ovs-vswitchd [k] copy_user_generic_string + 2.49% ovs-vswitchd [k] memcpy + 1.84% kpktgend_2 [k] memcpy + 1.81% kpktgend_1 [k] memcpy + 1.81% kpktgend_3 [k] memcpy + 1.78% kpktgend_0 [k] memcpy After: Result: OK: 24229690(c24127165+d102524) usec, 5000000 (9000byte,0frags) 206358pps 14857Mb/sec (14857776000bps) errors: 0 + 2.80% ovs-vswitchd [k] memcpy + 1.31% kpktgend_2 [k] memcpy + 1.23% kpktgend_0 [k] memcpy + 1.09% kpktgend_1 [k] memcpy + 1.04% kpktgend_3 [k] memcpy + 0.96% ovs-vswitchd [k] copy_user_generic_string Signed-off-by: Thomas Graf <tgraf@suug.ch> Reviewed-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-01-06openvswitch: Silence RCU lockdep checks from flow lookup.Jesse Gross1-2/+1
Flow lookup can happen either in packet processing context or userspace context but it was annotated as requiring RCU read lock to be held. This also allows OVS mutex to be held without causing warnings. Reported-by: Justin Pettit <jpettit@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com> Reviewed-by: Thomas Graf <tgraf@redhat.com>
2014-01-06openvswitch: Change ovs_flow_tbl_lookup_xx() APIsAndy Zhou1-12/+4
API changes only for code readability. No functional chnages. This patch removes the underscored version. Added a new API ovs_flow_tbl_lookup_stats() that returns the n_mask_hits. Reported by: Ben Pfaff <blp@nicira.com> Reviewed-by: Thomas Graf <tgraf@redhat.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-11-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-31/+28
Pull networking fixes from David Miller: "Mostly these are fixes for fallout due to merge window changes, as well as cures for problems that have been with us for a much longer period of time" 1) Johannes Berg noticed two major deficiencies in our genetlink registration. Some genetlink protocols we passing in constant counts for their ops array rather than something like ARRAY_SIZE(ops) or similar. Also, some genetlink protocols were using fixed IDs for their multicast groups. We have to retain these fixed IDs to keep existing userland tools working, but reserve them so that other multicast groups used by other protocols can not possibly conflict. In dealing with these two problems, we actually now use less state management for genetlink operations and multicast groups. 2) When configuring interface hardware timestamping, fix several drivers that simply do not validate that the hwtstamp_config value is one the driver actually supports. From Ben Hutchings. 3) Invalid memory references in mwifiex driver, from Amitkumar Karwar. 4) In dev_forward_skb(), set the skb->protocol in the right order relative to skb_scrub_packet(). From Alexei Starovoitov. 5) Bridge erroneously fails to use the proper wrapper functions to make calls to netdev_ops->ndo_vlan_rx_{add,kill}_vid. Fix from Toshiaki Makita. 6) When detaching a bridge port, make sure to flush all VLAN IDs to prevent them from leaking, also from Toshiaki Makita. 7) Put in a compromise for TCP Small Queues so that deep queued devices that delay TX reclaim non-trivially don't have such a performance decrease. One particularly problematic area is 802.11 AMPDU in wireless. From Eric Dumazet. 8) Fix crashes in tcp_fastopen_cache_get(), we can see NULL socket dsts here. Fix from Eric Dumzaet, reported by Dave Jones. 9) Fix use after free in ipv6 SIT driver, from Willem de Bruijn. 10) When computing mergeable buffer sizes, virtio-net fails to take the virtio-net header into account. From Michael Dalton. 11) Fix seqlock deadlock in ip4_datagram_connect() wrt. statistic bumping, this one has been with us for a while. From Eric Dumazet. 12) Fix NULL deref in the new TIPC fragmentation handling, from Erik Hugne. 13) 6lowpan bit used for traffic classification was wrong, from Jukka Rissanen. 14) macvlan has the same issue as normal vlans did wrt. propagating LRO disabling down to the real device, fix it the same way. From Michal Kubecek. 15) CPSW driver needs to soft reset all slaves during suspend, from Daniel Mack. 16) Fix small frame pacing in FQ packet scheduler, from Eric Dumazet. 17) The xen-netfront RX buffer refill timer isn't properly scheduled on partial RX allocation success, from Ma JieYue. 18) When ipv6 ping protocol support was added, the AF_INET6 protocol initialization cleanup path on failure was borked a little. Fix from Vlad Yasevich. 19) If a socket disconnects during a read/recvmsg/recvfrom/etc that blocks we can do the wrong thing with the msg_name we write back to userspace. From Hannes Frederic Sowa. There is another fix in the works from Hannes which will prevent future problems of this nature. 20) Fix route leak in VTI tunnel transmit, from Fan Du. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (106 commits) genetlink: make multicast groups const, prevent abuse genetlink: pass family to functions using groups genetlink: add and use genl_set_err() genetlink: remove family pointer from genl_multicast_group genetlink: remove genl_unregister_mc_group() hsr: don't call genl_unregister_mc_group() quota/genetlink: use proper genetlink multicast APIs drop_monitor/genetlink: use proper genetlink multicast APIs genetlink: only pass array to genl_register_family_with_ops() tcp: don't update snd_nxt, when a socket is switched from repair mode atm: idt77252: fix dev refcnt leak xfrm: Release dst if this dst is improper for vti tunnel netlink: fix documentation typo in netlink_set_err() be2net: Delete secondary unicast MAC addresses during be_close be2net: Fix unconditional enabling of Rx interface options net, virtio_net: replace the magic value ping: prevent NULL pointer dereference on write to msg_name bnx2x: Prevent "timeout waiting for state X" bnx2x: prevent CFC attention bnx2x: Prevent panic during DMAE timeout ...
2013-11-19genetlink: make multicast groups const, prevent abuseJohannes Berg1-28/+15
Register generic netlink multicast groups as an array with the family and give them contiguous group IDs. Then instead of passing the global group ID to the various functions that send messages, pass the ID relative to the family - for most families that's just 0 because the only have one group. This avoids the list_head and ID in each group, adding a new field for the mcast group ID offset to the family. At the same time, this allows us to prevent abusing groups again like the quota and dropmon code did, since we can now check that a family only uses a group it owns. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: pass family to functions using groupsJohannes Berg1-13/+22
This doesn't really change anything, but prepares for the next patch that will change the APIs to pass the group ID within the family, rather than the global group ID. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: add and use genl_set_err()Johannes Berg1-4/+4
Add a static inline to generic netlink to wrap netlink_set_err() to make it easier to use here - use it in openvswitch (the only generic netlink user of netlink_set_err()). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: only pass array to genl_register_family_with_ops()Johannes Berg1-2/+3
As suggested by David Miller, make genl_register_family_with_ops() a macro and pass only the array, evaluating ARRAY_SIZE() in the macro, this is a little safer. The openvswitch has some indirection, assing ops/n_ops directly in that code. This might ultimately just assign the pointers in the family initializations, saving the struct genl_family_and_ops and code (once mcast groups are handled differently.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-14genetlink: make all genl_ops users constJohannes Berg1-5/+5
Now that genl_ops are no longer modified in place when registering, they can be made const. This patch was done mostly with spatch: @@ identifier ops; @@ +const struct genl_ops ops[] = { ... }; (except the struct thing in net/openvswitch/datapath.c) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-14Merge branch 'core-locking-for-linus' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core locking changes from Ingo Molnar: "The biggest changes: - add lockdep support for seqcount/seqlocks structures, this unearthed both bugs and required extra annotation. - move the various kernel locking primitives to the new kernel/locking/ directory" * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) block: Use u64_stats_init() to initialize seqcounts locking/lockdep: Mark __lockdep_count_forward_deps() as static lockdep/proc: Fix lock-time avg computation locking/doc: Update references to kernel/mutex.c ipv6: Fix possible ipv6 seqlock deadlock cpuset: Fix potential deadlock w/ set_mems_allowed seqcount: Add lockdep functionality to seqcount/seqlock structures net: Explicitly initialize u64_stats_sync structures for lockdep locking: Move the percpu-rwsem code to kernel/locking/ locking: Move the lglocks code to kernel/locking/ locking: Move the rwsem code to kernel/locking/ locking: Move the rtmutex code to kernel/locking/ locking: Move the semaphore core to kernel/locking/ locking: Move the spinlock code to kernel/locking/ locking: Move the lockdep code to kernel/locking/ locking: Move the mutex code to kernel/locking/ hung_task debugging: Add tracepoint to report the hang x86/locking/kconfig: Update paravirt spinlock Kconfig description lockstat: Report avg wait and hold times lockdep, x86/alternatives: Drop ancient lockdep fixup message ...
2013-11-06net: Explicitly initialize u64_stats_sync structures for lockdepJohn Stultz1-0/+6
In order to enable lockdep on seqcount/seqlock structures, we must explicitly initialize any locks. The u64_stats_sync structure, uses a seqcount, and thus we need to introduce a u64_stats_init() function and use it to initialize the structure. This unfortunately adds a lot of fairly trivial initialization code to a number of drivers. But the benefit of ensuring correctness makes this worth while. Because these changes are required for lockdep to be enabled, and the changes are quite trivial, I've not yet split this patch out into 30-some separate patches, as I figured it would be better to get the various maintainers thoughts on how to best merge this change along with the seqcount lockdep enablement. Feedback would be appreciated! Signed-off-by: John Stultz <john.stultz@linaro.org> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: James Morris <jmorris@namei.org> Cc: Jesse Gross <jesse@nicira.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Mirko Lindner <mlindner@marvell.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Roger Luethi <rl@hellgate.ch> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Simon Horman <horms@verge.net.au> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Wensong Zhang <wensong@linux-vs.org> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/1381186321-4906-2-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-01openvswitch: Widen TCP flags handling.Jarno Rajahalme1-1/+1
Widen TCP flags handling from 7 bits (uint8_t) to 12 bits (uint16_t). The kernel interface remains at 8 bits, which makes no functional difference now, as none of the higher bits is currently of interest to the userspace. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-10-22openvswitch: collect mega flow mask statsAndy Zhou1-7/+31
Collect mega flow mask stats. ovs-dpctl show command can be used to display them for debugging and performance tuning. Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-10-04openvswitch: Simplify mega-flow APIs.Pravin B Shelar1-20/+7
Hides mega-flow implementation in flow_table.c rather than datapath.c. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-10-04openvswitch: Move mega-flow list out of rehashing struct.Pravin B Shelar1-60/+17
ovs-flow rehash does not touch mega flow list. Following patch moves it dp struct datapath. Avoid one extra indirection for accessing mega-flow list head on every packet receive. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-10-03openvswitch: Restructure datapath.c and flow.cPravin B Shelar1-498/+30
Over the time datapath.c and flow.c has became pretty large files. Following patch restructures functionality of component into three different components: flow.c: contains flow extract. flow_netlink.c: netlink flow api. flow_table.c: flow table api. This patch restructures code without changing logic. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-09-17openvswitch: Move flow table rehashing to flow install.Pravin B Shelar1-39/+11
Rehashing in ovs-workqueue can cause ovs-mutex lock contentions in case of heavy flow setups where both needs ovs-mutex. So by moving rehashing to flow-setup we can eliminate contention. This also simplify ovs locking and reduces dependence on workqueue. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-08-26openvswitch: Add SCTP supportJoe Stringer1-0/+6
This patch adds support for rewriting SCTP src,dst ports similar to the functionality already available for TCP/UDP. Rewriting SCTP ports is expensive due to double-recalculation of the SCTP checksums; this is performed to ensure that packets traversing OVS with invalid checksums will continue to the destination with any checksum corruption intact. Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Joe Stringer <joe@wand.net.nz> Signed-off-by: Ben Pfaff <blp@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
2013-08-23openvswitch: Mega flow implementationAndy Zhou1-40/+100
Add wildcarded flow support in kernel datapath. Wildcarded flow can improve OVS flow set up performance by avoid sending matching new flows to the user space program. The exact performance boost will largely dependent on wildcarded flow hit rate. In case all new flows hits wildcard flows, the flow set up rate is within 5% of that of linux bridge module. Pravin has made significant contributions to this patch. Including API clean ups and bug fixes. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>