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2015-03-29net: dsa: mv88e6171: Add EEE support to the mv88e6172Andrew Lunn1-0/+24
The mv88e6172 has support for EEE. Check for the product ID and call the common code if applicable. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6171: Add defines for switch product IDsAndrew Lunn1-2/+6
Make the code more readable by using defines for the switch IDs. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: Centralise getting switch idAndrew Lunn2-2/+2
Get the switch id and save it away in the private mv88x6xxx structure in a centralised piece of code, rather than each driver doing it itself. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6352: Add support for ndo_fdb functionsGuenter Roeck1-0/+3
Add support for manipulating switch fdb entries by pointing to the ndo_fdb functions implemented for mv88e6xxxx. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Add support for fdb_add, fdb_del, and fdb_getnextGuenter Roeck2-0/+152
No vlan support at this time. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: Add basic framework to support ndo_fdb functionsGuenter Roeck2-0/+108
Provide callbacks for ndo_fdb_add, ndo_fdb_del, and ndo_fdb_dump. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6352: Add support for hardware bridgingGuenter Roeck1-0/+3
Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Add Hardware bridging supportGuenter Roeck2-7/+292
Bridge support is similar for all chips supported by the mv88e6xxx code, so add the code there. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6171: Use common port configurationGuenter Roeck1-23/+1
Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6123_61_65: Use common port configurationGuenter Roeck1-23/+1
This will simplify adding offloaded bridge support later on. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6352: Use common port initialization codeGuenter Roeck1-23/+1
This prepares the driver for hardware bridging. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Split mv88e6xxx_reg_read and mv88e6xxx_reg_writeGuenter Roeck1-9/+26
Split mv88e6xxx_reg_read and mv88e6xxx_reg_write into two functions each, one to acquire smi_mutex and one to get struct mii_bus *bus from struct dsa_switch *ds and to call the actual read/write function. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Disable Message Port bit for CPU portGuenter Roeck1-4/+3
Datasheet says that the Message Port bit should not be set for the CPU port. Having it set causes DSA tagged packets to be sent to the CPU port roughly every 30 seconds. Those packets are the same as real packets forwarded between switch ports if the switch is configured for switching between multiple ports. The packets are then bridged by the software bridge, resulting in duplicated packets on the network. Reported-by: Andrew Lunn <andrew@lunn.ch> Cc: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Provide function for common port initializationGuenter Roeck2-0/+40
Provide mv88e6xxx_setup_port_common() for common port initialization. Currently only write Port 1 Control and VLAN configuration since this will be needed for hardware bridging. More can be added later if desired/needed. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: dsa: mv88e6xxx: Factor out common initialization codeGuenter Roeck5-12/+22
Code used and needed in mv886xxx.c should be initialized there as well, so factor it out from the individual initialization files. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29hv_netvsc: remove vmbus_are_subchannels_present() in rndis_filter_device_add()Haiyang Zhang1-2/+0
The vmbus_are_subchannels_present() also involves opening the channels, which may be too early at this point. Checking for subchannels is not necessary here. So this patch removes it. Subchannels will be opened when offer messages arrive. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: smc91x: make use of 4th parameter to devm_gpiod_get_indexUwe Kleine-König1-17/+8
Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions) which appeared in v3.17-rc1, the gpiod_get* functions take an additional parameter that allows to specify direction and initial value for output. Simplify accordingly. Moreover use devm_gpiod_get_index_optional for still simpler handling. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29hv_netvsc: Implement batching in send bufferHaiyang Zhang4-47/+162
With this patch, we can send out multiple RNDIS data packets in one send buffer slot and one VMBus message. It reduces the overhead associated with VMBus messages. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29tipc: involve reference counter for node structureYing Xue6-30/+79
TIPC node hash node table is protected with rcu lock on read side. tipc_node_find() is used to look for a node object with node address through iterating the hash node table. As the entire process of what tipc_node_find() traverses the table is guarded with rcu read lock, it's safe for us. However, when callers use the node object returned by tipc_node_find(), there is no rcu read lock applied. Therefore, this is absolutely unsafe for callers of tipc_node_find(). Now we introduce a reference counter for node structure. Before tipc_node_find() returns node object to its caller, it first increases the reference counter. Accordingly, after its caller used it up, it decreases the counter again. This can prevent a node being used by one thread from being freed by another thread. Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericson.com> Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29tipc: fix potential deadlock when all links are resetYing Xue5-32/+8
[ 60.988363] ====================================================== [ 60.988754] [ INFO: possible circular locking dependency detected ] [ 60.989152] 3.19.0+ #194 Not tainted [ 60.989377] ------------------------------------------------------- [ 60.989781] swapper/3/0 is trying to acquire lock: [ 60.990079] (&(&n_ptr->lock)->rlock){+.-...}, at: [<ffffffffa0006dca>] tipc_link_retransmit+0x1aa/0x240 [tipc] [ 60.990743] [ 60.990743] but task is already holding lock: [ 60.991106] (&(&bclink->lock)->rlock){+.-...}, at: [<ffffffffa00004be>] tipc_bclink_lock+0x8e/0xa0 [tipc] [ 60.991738] [ 60.991738] which lock already depends on the new lock. [ 60.991738] [ 60.992174] [ 60.992174] the existing dependency chain (in reverse order) is: [ 60.992174] -> #1 (&(&bclink->lock)->rlock){+.-...}: [ 60.992174] [<ffffffff810a9c0c>] lock_acquire+0x9c/0x140 [ 60.992174] [<ffffffff8179c41f>] _raw_spin_lock_bh+0x3f/0x50 [ 60.992174] [<ffffffffa00004be>] tipc_bclink_lock+0x8e/0xa0 [tipc] [ 60.992174] [<ffffffffa0000f57>] tipc_bclink_add_node+0x97/0xf0 [tipc] [ 60.992174] [<ffffffffa0011815>] tipc_node_link_up+0xf5/0x110 [tipc] [ 60.992174] [<ffffffffa0007783>] link_state_event+0x2b3/0x4f0 [tipc] [ 60.992174] [<ffffffffa00193c0>] tipc_link_proto_rcv+0x24c/0x418 [tipc] [ 60.992174] [<ffffffffa0008857>] tipc_rcv+0x827/0xac0 [tipc] [ 60.992174] [<ffffffffa0002ca3>] tipc_l2_rcv_msg+0x73/0xd0 [tipc] [ 60.992174] [<ffffffff81646e66>] __netif_receive_skb_core+0x746/0x980 [ 60.992174] [<ffffffff816470c1>] __netif_receive_skb+0x21/0x70 [ 60.992174] [<ffffffff81647295>] netif_receive_skb_internal+0x35/0x130 [ 60.992174] [<ffffffff81648218>] napi_gro_receive+0x158/0x1d0 [ 60.992174] [<ffffffff81559e05>] e1000_clean_rx_irq+0x155/0x490 [ 60.992174] [<ffffffff8155c1b7>] e1000_clean+0x267/0x990 [ 60.992174] [<ffffffff81647b60>] net_rx_action+0x150/0x360 [ 60.992174] [<ffffffff8105ec43>] __do_softirq+0x123/0x360 [ 60.992174] [<ffffffff8105f12e>] irq_exit+0x8e/0xb0 [ 60.992174] [<ffffffff8179f9f5>] do_IRQ+0x65/0x110 [ 60.992174] [<ffffffff8179da6f>] ret_from_intr+0x0/0x13 [ 60.992174] [<ffffffff8100de9f>] arch_cpu_idle+0xf/0x20 [ 60.992174] [<ffffffff8109dfa6>] cpu_startup_entry+0x2f6/0x3f0 [ 60.992174] [<ffffffff81033cda>] start_secondary+0x13a/0x150 [ 60.992174] -> #0 (&(&n_ptr->lock)->rlock){+.-...}: [ 60.992174] [<ffffffff810a8f7d>] __lock_acquire+0x163d/0x1ca0 [ 60.992174] [<ffffffff810a9c0c>] lock_acquire+0x9c/0x140 [ 60.992174] [<ffffffff8179c41f>] _raw_spin_lock_bh+0x3f/0x50 [ 60.992174] [<ffffffffa0006dca>] tipc_link_retransmit+0x1aa/0x240 [tipc] [ 60.992174] [<ffffffffa0001e11>] tipc_bclink_rcv+0x611/0x640 [tipc] [ 60.992174] [<ffffffffa0008646>] tipc_rcv+0x616/0xac0 [tipc] [ 60.992174] [<ffffffffa0002ca3>] tipc_l2_rcv_msg+0x73/0xd0 [tipc] [ 60.992174] [<ffffffff81646e66>] __netif_receive_skb_core+0x746/0x980 [ 60.992174] [<ffffffff816470c1>] __netif_receive_skb+0x21/0x70 [ 60.992174] [<ffffffff81647295>] netif_receive_skb_internal+0x35/0x130 [ 60.992174] [<ffffffff81648218>] napi_gro_receive+0x158/0x1d0 [ 60.992174] [<ffffffff81559e05>] e1000_clean_rx_irq+0x155/0x490 [ 60.992174] [<ffffffff8155c1b7>] e1000_clean+0x267/0x990 [ 60.992174] [<ffffffff81647b60>] net_rx_action+0x150/0x360 [ 60.992174] [<ffffffff8105ec43>] __do_softirq+0x123/0x360 [ 60.992174] [<ffffffff8105f12e>] irq_exit+0x8e/0xb0 [ 60.992174] [<ffffffff8179f9f5>] do_IRQ+0x65/0x110 [ 60.992174] [<ffffffff8179da6f>] ret_from_intr+0x0/0x13 [ 60.992174] [<ffffffff8100de9f>] arch_cpu_idle+0xf/0x20 [ 60.992174] [<ffffffff8109dfa6>] cpu_startup_entry+0x2f6/0x3f0 [ 60.992174] [<ffffffff81033cda>] start_secondary+0x13a/0x150 [ 60.992174] [ 60.992174] other info that might help us debug this: [ 60.992174] [ 60.992174] Possible unsafe locking scenario: [ 60.992174] [ 60.992174] CPU0 CPU1 [ 60.992174] ---- ---- [ 60.992174] lock(&(&bclink->lock)->rlock); [ 60.992174] lock(&(&n_ptr->lock)->rlock); [ 60.992174] lock(&(&bclink->lock)->rlock); [ 60.992174] lock(&(&n_ptr->lock)->rlock); [ 60.992174] [ 60.992174] *** DEADLOCK *** [ 60.992174] [ 60.992174] 3 locks held by swapper/3/0: [ 60.992174] #0: (rcu_read_lock){......}, at: [<ffffffff81646791>] __netif_receive_skb_core+0x71/0x980 [ 60.992174] #1: (rcu_read_lock){......}, at: [<ffffffffa0002c35>] tipc_l2_rcv_msg+0x5/0xd0 [tipc] [ 60.992174] #2: (&(&bclink->lock)->rlock){+.-...}, at: [<ffffffffa00004be>] tipc_bclink_lock+0x8e/0xa0 [tipc] [ 60.992174] The correct the sequence of grabbing n_ptr->lock and bclink->lock should be that the former is first held and the latter is then taken, which exactly happened on CPU1. But especially when the retransmission of broadcast link is failed, bclink->lock is first held in tipc_bclink_rcv(), and n_ptr->lock is taken in link_retransmit_failure() called by tipc_link_retransmit() subsequently, which is demonstrated on CPU0. As a result, deadlock occurs. If the order of holding the two locks happening on CPU0 is reversed, the deadlock risk will be relieved. Therefore, the node lock taken in link_retransmit_failure() originally is moved to tipc_bclink_rcv() so that it's obtained before bclink lock. But the precondition of the adjustment of node lock is that responding to bclink reset event must be moved from tipc_bclink_unlock() to tipc_node_unlock(). Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29virtio: simplify the using of received in virtnet_pollLi RongQing1-2/+2
received is 0, no need to minus it and use "+=" to reassign it Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29be2net: bump up the driver version to 10.6.0.1Sathya Perla1-1/+1
Signed-off-by: Sathya Perla <sathya.perla@emulex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29be2net: setup xps queue mappingSathya Perla1-3/+7
This patch sets up xps queue mapping on load, so that TX traffic is steered to the queue whose irqs are being processed by the current cpu. This helps in avoiding TX lock contention. Signed-off-by: Sathya Perla <sathya.perla@emulex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29be2net: assign CPU affinity hints to be2net IRQsPadmanabh Ratnakar2-3/+16
This patch provides hints to irqbalance to map be2net IRQs to specific CPU cores. cpumask_set_cpu_local_first() is used, which first maps IRQs to near NUMA cores; when those cores are exhausted, IRQs are mapped to far NUMA cores. Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com> Signed-off-by: Sathya Perla <sathya.perla@emulex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29tcp: tcp_syn_flood_action() can be staticEric Dumazet3-31/+29
After commit 1fb6f159fd21 ("tcp: add tcp_conn_request"), tcp_syn_flood_action() is no longer used from IPv6. We can make it static, by moving it above tcp_conn_request() Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Octavian Purdila <octavian.purdila@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29cxgb4: fix boolreturn.cocci warningsWu Fengguang1-3/+3
drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c:49:9-10: WARNING: return of 0/1 in function 'cxgb_fcoe_sof_eof_supported' with return type bool Return statements in functions returning bool should use true/false instead of 1/0. Generated by: scripts/coccinelle/misc/boolreturn.cocci CC: Varun Prakash <varun@chelsio.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29fib6: install fib6 ops in the last stepWANG Cong1-6/+3
We should not commit the new ops until we finish all the setup, otherwise we have to NULL it on failure. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: add support for multiple Rx queuesPetri Gynther2-45/+137
Add support for multiple Rx queues: 1. Add NAPI context per Rx queue 2. Modify Rx interrupt and Rx NAPI code to handle multiple Rx queues Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: rework Rx NAPI codePetri Gynther1-23/+45
Introduce new bcmgenet functions to handle the NAPI calls to: netif_napi_add() napi_enable() napi_disable() netif_napi_del() Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: rework Tx NAPI codePetri Gynther1-18/+62
Introduce new bcmgenet functions to handle the NAPI calls to: netif_napi_add() napi_enable() napi_disable() netif_napi_del() Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: tweak init_umac()Petri Gynther1-13/+20
Use more meaningful variable names int0_enable and int1_enable when enabling bcmgenet interrupts. For Rx default queue interrupts, use: UMAC_IRQ_RXDMA_BDONE | UMAC_IRQ_RXDMA_PDONE For Tx default queue interrupts, use: UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: simplify bcmgenet_init_dma()Petri Gynther1-16/+17
Do the two kcalloc() calls first, before proceeding into Rx/Tx DMA init. Makes the error case handling much simpler. Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Jaedon Shin <jaedon.shin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: modify Tx ring int_enable and int_disable vectorsPetri Gynther2-19/+13
Remove unnecessary function parameter priv. Use ring->priv instead. Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27net: bcmgenet: remove priv->int0_mask and priv->int1_maskPetri Gynther2-4/+0
Remove unused priv->int0_mask and priv->int1_mask. Signed-off-by: Petri Gynther <pgynther@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27drivers: net: xgene: Add separate tx completion ringIyappan Subramanian2-20/+127
- Added wrapper functions around napi_add, napi_del, napi_enable and napi_disable - Moved platform_get_irq function call after reading phy_mode - Associating the new irq to tx completion for the supported ethernet interfaces Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Keyur Chudgar <kchudgar@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27dtb: xgene: Add interrupt for Tx completionIyappan Subramanian1-3/+6
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Keyur Chudgar <kchudgar@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27Documentation: dts: xgene: Update interrupt field descriptionIyappan Subramanian1-1/+4
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Keyur Chudgar <kchudgar@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-26netfilter: nf_tables: implement set transaction supportPatrick McHardy4-40/+112
Set elements are the last object type not supporting transaction support. Implement similar to the existing rule transactions: The global transaction counter keeps track of two generations, current and next. Each element contains a bitmask specifying in which generations it is inactive. New elements start out as inactive in the current generation and active in the next. On commit, the previous next generation becomes the current generation and the element becomes active. The bitmask is then cleared to indicate that the element is active in all future generations. If the transaction is aborted, the element is removed from the set before it becomes active. When removing an element, it gets marked as inactive in the next generation. On commit the next generation becomes active and the therefor the element inactive. It is then taken out of then set and released. On abort, the element is marked as active for the next generation again. Lookups ignore elements not active in the current generation. The current set types (hash/rbtree) both use a field in the extension area to store the generation mask. This (currently) does not require any additional memory since we have some free space in there. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-26netfilter: nf_tables: add transaction helper functionsPatrick McHardy3-16/+35
Add some helper functions for building the genmask as preparation for set transactions. Also add a little documentation how this stuff actually works. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-26netfilter: nf_tables: return set extensions from ->lookup()Patrick McHardy4-9/+14
Return the extension area from the ->lookup() function to allow to consolidate common actions. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-26netfilter: nf_tables: consolide set element destructionPatrick McHardy4-41/+27
With the conversion to set extensions, it is now possible to consolidate the different set element destruction functions. The set implementations' ->remove() functions are changed to only take the element out of their internal data structures. Elements will be freed in a batched fashion after the global transaction's completion RCU grace period. This reduces the amount of grace periods required for nft_hash from N to zero additional ones, additionally this guarantees that the set elements' extensions of all implementations can be used under RCU protection. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-25ipv6: hash net ptr into fragmentation bucket selectionHannes Frederic Sowa4-13/+16
As namespaces are sometimes used with overlapping ip address ranges, we should also use the namespace as input to the hash to select the ip fragmentation counter bucket. Cc: Eric Dumazet <edumazet@google.com> Cc: Flavio Leitner <fbl@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25ipv4: hash net ptr into fragmentation bucket selectionHannes Frederic Sowa10-21/+26
As namespaces are sometimes used with overlapping ip address ranges, we should also use the namespace as input to the hash to select the ip fragmentation counter bucket. Cc: Eric Dumazet <edumazet@google.com> Cc: Flavio Leitner <fbl@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25tipc: eliminate race condition at dual link establishmentJon Paul Maloy3-0/+55
Despite recent improvements, the establishment of dual parallel links still has a small glitch where messages can bypass each other. When the second link in a dual-link configuration is established, part of the first link's traffic will be steered over to the new link. Although we do have a mechanism to ensure that packets sent before and after the establishment of the new link arrive in sequence to the destination node, this is not enough. The arriving messages will still be delivered upwards in different threads, something entailing a risk of message disordering during the transition phase. To fix this, we introduce a synchronization mechanism between the two parallel links, so that traffic arriving on the new link cannot be added to its input queue until we are guaranteed that all pre-establishment messages have been delivered on the old, parallel link. This problem seems to always have been around, but its occurrence is so rare that it has not been noticed until recent intensive testing. Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25tipc: clean up handling of link congestionJon Paul Maloy2-72/+60
After the recent changes in message importance handling it becomes possible to simplify handling of messages and sockets when we encounter link congestion. We merge the function tipc_link_cong() into link_schedule_user(), and simplify the code of the latter. The code should now be easier to follow, especially regarding return codes and handling of the message that caused the situation. In case the scheduling function is unable to pre-allocate a wakeup message buffer, it now returns -ENOBUFS, which is a more correct code than the previously used -EHOSTUNREACH. Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25tipc: introduce starvation free send algorithmJon Paul Maloy3-25/+42
Currently, we only use a single counter; the length of the backlog queue, to determine whether a message should be accepted to the queue or not. Each time a message is being sent, the queue length is compared to a threshold value for the message's importance priority. If the queue length is beyond this threshold, the message is rejected. This algorithm implies a risk of starvation of low importance senders during very high load, because it may take a long time before the backlog queue has decreased enough to accept a lower level message. We now eliminate this risk by introducing a counter for each importance priority. When a message is sent, we check only the queue level for that particular message's priority. If that is ok, the message can be added to the backlog, irrespective of the queue level for other priorities. This way, each level is guaranteed a certain portion of the total bandwidth, and any risk of starvation is eliminated. Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25net: dsa: Handle non-bridge master changeGuenter Roeck1-1/+2
Master change notifications may occur other than when joining or leaving a bridge, for example when being added to or removed from a bond or Open vSwitch. In that case, do nothing instead of asking the switch driver to remove a port from a bridge that it didn't join. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25netfilter: nf_tables: convert hash and rbtree to set extensionsPatrick McHardy4-121/+132
The set implementations' private struct will only contain the elements needed to maintain the search structure, all other elements are moved to the set extensions. Element allocation and initialization is performed centrally by nf_tables_api instead of by the different set implementations' ->insert() functions. A new "elemsize" member in the set ops specifies the amount of memory to reserve for internal usage. Destruction will also be moved out of the set implementations by a following patch. Except for element allocation, the patch is a simple conversion to using data from the extension area. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-25netfilter: nf_tables: add set extensionsPatrick McHardy2-0/+121
Add simple set extension infrastructure for maintaining variable sized and optional per element data. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-03-25netfilter: nft_hash: convert to use rhashtable callbacksPatrick McHardy1-5/+49
A following patch will convert sets to use so called set extensions, where the key is not located in a fixed position anymore. This will require rhashtable hashing and comparison callbacks to be used. As preparation, convert nft_hash to use these callbacks without any functional changes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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