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* pktgen: tx_bytes might be slightly wrongEric Dumazet2009-11-051-2/+3
| | | | | | | | | cur_pkt_size can be changed in proc fs while pktgen is running, we better use a private field to get precise tx-bytes counter. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2009-10-271-5/+10
|\ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/sh_eth.c
| * pktgen: Dont leak kernel memoryEric Dumazet2009-10-241-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | While playing with pktgen, I realized IP ID was not filled and a random value was taken, possibly leaking 2 bytes of kernel memory. We can use an increasing ID, this can help diagnostics anyway. Also clear packet payload, instead of leaking kernel memory. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵David S. Miller2009-10-061-2/+2
|\ \ | |/ | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
| * pktgen: restore nanosec delaysEric Dumazet2009-10-041-1/+1
| | | | | | | | | | | | | | | | Commit fd29cf72 (pktgen: convert to use ktime_t) inadvertantly converted "delay" parameter from nanosec to microsec. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * pktgen: Fix multiqueue handlingEric Dumazet2009-10-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is not currently possible to instruct pktgen to use one selected tx queue. When Robert added multiqueue support in commit 45b270f8, he added an interval (queue_map_min, queue_map_max), and his code doesnt take into account the case of min = max, to select one tx queue exactly. I suspect a high performance setup on a eight txqueue device wants to use exactly eight cpus, and assign one tx queue to each sender. This patchs makes pktgen select the right tx queue, not the first one. Also updates Documentation to reflect Robert changes. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pktgen: Avoid dirtying skb->users when txq is fullEric Dumazet2009-10-051-4/+7
|/ | | | | | | | | We can avoid two atomic ops on skb->users if packet is not going to be sent to the device (because hardware txqueue is full) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: Fix delay handlingEric Dumazet2009-10-011-2/+4
| | | | | | | | | | | | After last pktgen changes, delay handling is wrong. pktgen actually sends packets at full line speed. Fix is to update pkt_dev->next_tx even if spin() returns early, so that next spin() calls have a chance to see a positive delay. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: better scheduler friendlinessStephen Hemminger2009-09-241-79/+72
| | | | | | | | | | | | | | Previous update did not resched in inner loop causing watchdogs. Rewrite inner loop to: * account for delays better with less clock calls * more accurate timing of delay: - only delay if packet was successfully sent - if delay is 100ns and it takes 10ns to build packet then account for that * use wait_event_interruptible_timeout rather than open coding it. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: T_TERMINATE flag is unusedStephen Hemminger2009-09-241-5/+4
| | | | | | | Get rid of unused flag bit. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netdev: convert pseudo-devices to netdev_tx_tStephen Hemminger2009-09-011-1/+1
| | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: use proc_create_data()Alexey Dobriyan2009-08-281-2/+4
| | | | | | | | | | It looks like after rename device proc entry is unusable, because of no ->read_proc or ->proc_fops. And create_proc_entry() is deprecated. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: increase versionStephen Hemminger2009-08-281-6/+10
| | | | | | | Increase module version, and cleanup module info. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: cleanup checkpatch warningsStephen Hemminger2009-08-281-139/+159
| | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: use common idle routineStephen Hemminger2009-08-281-10/+4
| | | | | | | | | Simpler to have one place that spins and accounts for delays, this will also make the last packet be detected faster for more repeatable timing. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: spin using hrtimerStephen Hemminger2009-08-281-21/+28
| | | | | | | | | This changes how the pktgen thread spins/waits between packets if delay is configured. It uses a high res timer to wait for time to arrive. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: convert to use ktime_tStephen Hemminger2009-08-281-100/+84
| | | | | | | | The kernel ktime_t is a nice generic infrastructure for mananging high resolution times, as is done in pktgen. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: avoid calling gettimeofdayStephen Hemminger2009-08-281-7/+9
| | | | | | | | | If not using delay then no need to update next_tx after each packet sent. This allows pktgen to send faster especially on systems with slower clock sources. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: reorganize transmit loopStephen Hemminger2009-08-281-12/+14
| | | | | | | Handle standard (and non-standard) return values in a switch. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: use netdev_alloc_skbStephen Hemminger2009-08-281-4/+6
| | | | | | | | | netdev_alloc_skb is NUMA node aware. Also, don't exhaust atomic emergency pool. Don't want pktgen to cause OOM behaviour. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: cleanup clone count testStephen Hemminger2009-08-281-17/+15
| | | | | | | | The if statement to test for "should a new packet be used" can be simplified. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: xmit logic reorganizationStephen Hemminger2009-08-281-31/+24
| | | | | | | | | | | | Do some reorganization of transmit logic path: * move transmit queue full idle to separate routine * add a cpu_relax() * eliminate some of the uneeded goto's * if queue is still stopped, go back to main thread loop. * don't give up transmitting if quantum is exhausted (be greedy) Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: stop_device cleanupStephen Hemminger2009-08-281-9/+3
| | | | | | | | All the callers were freeing skb after stopping device. Remove unneeded forward decl. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: mark read-only/mostly variablesStephen Hemminger2009-08-281-5/+5
| | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: change inliningStephen Hemminger2009-08-281-8/+7
| | | | | | | | Don't force inlining where not needed. Gcc does better job of deciding to inline local functions. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: minor cleanupStephen Hemminger2009-08-281-16/+9
| | | | | | | A couple of minor functions can be written more compactly. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net pkgen.c:fix no need for checkFigo.zhang2009-06-081-4/+2
| | | | | | | | vfree() does its own 'NULL' check, so no need for check before calling it. Signed-off-by: Figo.zhang <figo1802@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: txq_trans_update() helperEric Dumazet2009-05-251-0/+1
| | | | | | | | | | | | | | | | We would like to get rid of netdev->trans_start = jiffies; that about all net drivers have to use in their start_xmit() function, and use txq->trans_start instead. This can be done generically in core network, as suggested by David. Some devices, (particularly loopback) dont need trans_start update, because they dont have transmit watchdog. We could add a new device flag, or rely on fact that txq->tran_start can be updated is txq->xmit_lock_owner is different than -1. Use a helper function to hide our choice. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: do not access flows[] beyond its lengthFlorian Westphal2009-05-211-1/+1
| | | | | | | | | typo -- pkt_dev->nflows is for stats only, the number of concurrent flows is stored in cflows. Reported-By: Vladimir Ivashchenko <hazard@francoudi.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* proc 2/2: remove struct proc_dir_entry::ownerAlexey Dobriyan2009-03-311-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy as correctly noted at bug #12454. Someone can lookup entry with NULL ->owner, thus not pinning enything, and release it later resulting in module refcount underflow. We can keep ->owner and supply it at registration time like ->proc_fops and ->data. But this leaves ->owner as easy-manipulative field (just one C assignment) and somebody will forget to unpin previous/pin current module when switching ->owner. ->proc_fops is declared as "const" which should give some thoughts. ->read_proc/->write_proc were just fixed to not require ->owner for protection. rmmod'ed directories will be empty and return "." and ".." -- no harm. And directories with tricky enough readdir and lookup shouldn't be modular. We definitely don't want such modular code. Removing ->owner will also make PDE smaller. So, let's nuke it. Kudos to Jeff Layton for reminding about this, let's say, oversight. http://bugzilla.kernel.org/show_bug.cgi?id=12454 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
* pktgen: remove some pointless conditionals before kfree_skb()Wei Yongjun2009-02-261-12/+6
| | | | | | | Remove some pointless conditionals before kfree_skb(). Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: finding states in netnsAlexey Dobriyan2008-11-251-1/+2
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netdev: add more functions to netdevice opsStephen Hemminger2008-11-201-4/+4
| | | | | | | | | | | | This patch moves neigh_setup and hard_start_xmit into the network device ops structure. For bisection, fix all the previously converted drivers as well. Bonding driver took the biggest hit on this. Added a prefetch of the hard_start_xmit in the fast path to try and reduce any impact this would have. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2008-11-201-7/+2
|\ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/ixgbe/ixgbe_main.c include/net/mac80211.h net/phonet/af_phonet.c
| * pktgen: fix multiple queue warningRobert Olsson2008-11-191-7/+2
| | | | | | | | | | | | | | | | As number of TX queues in unrelated to number of CPU's we remove this test and just make sure nxtq never gets exceeded. Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pktgen: add full reset functionalityJesse Brandeburg2008-11-101-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While testing pktgen, I found that sometimes my configurations from previous runs would be left over, particularly when going from a test with 8 threads down to a test with 4 threads. This adds new functionality to pktgen where you can call pgset "reset" and it will be just like you just insmod'ed pktgen again. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵David S. Miller2008-10-311-14/+13
|\ \ | |/ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/p54/p54common.c
| * pktgen: fix multiple queue warningJesse Brandeburg2008-10-281-14/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | when testing the new pktgen module with multiple queues and ixgbe with: pgset "flag QUEUE_MAP_CPU" I found that I was getting errors in dmesg like: pktgen: WARNING: QUEUE_MAP_CPU disabled because CPU count (8) exceeds number <4>pktgen: WARNING: of tx queues (8) on eth15 you'll note, 8 really doesn't exceed 8. This patch seemed to fix the logic errors and also the attempts at limiting line length in printk (which didn't work anyway) Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: convert print_mac to %pMJohannes Berg2008-10-271-5/+4
|/ | | | | | | | | | | | This converts pretty much everything to print_mac. There were a few things that had conflicts which I have just dropped for now, no harm done. I've built an allyesconfig with this and looked at the files that weren't built very carefully, but it's a huge patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: fix skb leak in case of failureIlpo Järvinen2008-10-131-3/+5
| | | | | | | | | Seems that skb goes into void unless something magic happened in pskb_expand_head in case of failure. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: prevent pktgen from using bad tx queueAndrew Gallatin2008-08-131-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the new multi-queue transmit code, it is possible to accidentally make pktgen pick a non-existing tx queue simply by using a stale script to drive pktgen. Access to this non-existing tx queue will then trigger a bad memory access and kill the machine. For example, setting "queue_map_max 2" will cause my machine to die when accessing a garbage spinlock in the non-existing tx queue: BUG: spinlock bad magic on CPU#0, kpktgend_0/564 lock: ffff88001ddf6718, .magic: ffffffff, .owner: /-1, .owner_cpu: 0 Pid: 564, comm: kpktgend_0 Not tainted 2.6.27-rc3 #35 Call Trace: [<ffffffff803a1228>] spin_bug+0xa4/0xac [<ffffffff803a1253>] _raw_spin_lock+0x23/0x123 [<ffffffff8055b06f>] _spin_lock_bh+0x17/0x1b [<ffffffff804cb57d>] pktgen_thread_worker+0xa97/0x1002 [<ffffffff8022874d>] ? finish_task_switch+0x38/0x97 [<ffffffff80242077>] ? autoremove_wake_function+0x0/0x36 [<ffffffff80242077>] ? autoremove_wake_function+0x0/0x36 [<ffffffff804caae6>] ? pktgen_thread_worker+0x0/0x1002 [<ffffffff80241a40>] kthread+0x44/0x6d [<ffffffff8020c399>] child_rip+0xa/0x11 [<ffffffff802419fc>] ? kthread+0x0/0x6d [<ffffffff8020c38f>] ? child_rip+0x0/0x11 The attached patch adds some sanity checking to prevent these sorts of configuration errors. Signed-off-by: Andrew Gallatin <gallatin@myri.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: multiqueue etc.Robert Olsson2008-08-071-3/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sofar far pktgen have had a restriction to only use one device per kernel thread. With the new multiqueue architecture this is no longer adequate. The patch below is an effort to remove this by in pktgen configuration adding a tag to the device name a la eth0@0 etc. The tag is used for usual device config just as before. Also a new flag is introduced to mirror queue_map with sending threads smp_processor_id() QUEUE_MAP_CPU. An example: We use 4 CPU's to send to one 10g interface (eth0) and we use the new tagging to send a mix of packet sizes, 64, 576 and 1500 bytes. Also we use TX queues according to smp_processor_id() PGDEV=/proc/net/pktgen/kpktgend_0 pgset "add_device eth0@0" PGDEV=/proc/net/pktgen/kpktgend_1 pgset "add_device eth0@1" PGDEV=/proc/net/pktgen/kpktgend_2 pgset "add_device eth0@2" PGDEV=/proc/net/pktgen/kpktgend_3 pgset "add_device eth0@3" .... PGDEV=/proc/net/pktgen/eth0@0 pgset "pkt_size 64" pgset "flag QUEUE_MAP_CPU" PGDEV=/proc/net/pktgen/eth0@1 pgset "pkt_size 572" pgset "flag QUEUE_MAP_CPU" PGDEV=/proc/net/pktgen/eth0@2 pgset "pkt_size 1496" PGDEV=/proc/net/pktgen/eth0@3 pgset "pkt_size 1496" pgset "flag QUEUE_MAP_CPU" Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: mac countRobert Olsson2008-08-051-2/+2
| | | | | | | | dst_mac_count and src_mac_count patch from Eneas Hunguana We have sent one mac address to much. Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: random flow Robert Olsson2008-08-051-1/+5
| | | | | | | Random flow generation has not worked. This fixes it. Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* netdev: Fix lockdep warnings in multiqueue configurations.David S. Miller2008-07-311-2/+5
| | | | | | | | | | | | | | When support for multiple TX queues were added, the netif_tx_lock() routines we converted to iterate over all TX queues and grab each queue's spinlock. This causes heartburn for lockdep and it's not a healthy thing to do with lots of TX queues anyways. So modify this to use a top-level lock and a "frozen" state for the individual TX queues. Signed-off-by: David S. Miller <davem@davemloft.net>
* netns: Use net_eq() to compare net-namespaces for optimization.YOSHIFUJI Hideaki2008-07-191-1/+1
| | | | | | | | Without CONFIG_NET_NS, namespace is always &init_net. Compiler will be able to omit namespace comparisons with this patch. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Use queue aware tests throughout.David S. Miller2008-07-171-25/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This effectively "flips the switch" by making the core networking and multiqueue-aware drivers use the new TX multiqueue structures. Non-multiqueue drivers need no changes. The interfaces they use such as netif_stop_queue() degenerate into an operation on TX queue zero. So everything "just works" for them. Code that really wants to do "X" to all TX queues now invokes a routine that does so, such as netif_tx_wake_all_queues(), netif_tx_stop_all_queues(), etc. pktgen and netpoll required a little bit more surgery than the others. In particular the pktgen changes, whilst functional, could be largely improved. The initial check in pktgen_xmit() will sometimes check the wrong queue, which is mostly harmless. The thing to do is probably to invoke fill_packet() earlier. The bulk of the netpoll changes is to make the code operate solely on the TX queue indicated by by the SKB queue mapping. Setting of the SKB queue mapping is entirely confined inside of net/core/dev.c:dev_pick_tx(). If we end up needing any kind of special semantics (drops, for example) it will be implemented here. Finally, we now have a "real_num_tx_queues" which is where the driver indicates how many TX queues are actually active. With IGB changes from Jeff Kirsher. Signed-off-by: David S. Miller <davem@davemloft.net>
* pktgen: make sure that pktgen_thread_worker has been executedDenis V. Lunev2008-05-201-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | The following courruption can happen during pktgen stop: list_del corruption. prev->next should be ffff81007e8a5e70, but was 6b6b6b6b6b6b6b6b kernel BUG at lib/list_debug.c:67! :pktgen:pktgen_thread_worker+0x374/0x10b0 ? autoremove_wake_function+0x0/0x40 ? _spin_unlock_irqrestore+0x42/0x80 ? :pktgen:pktgen_thread_worker+0x0/0x10b0 kthread+0x4d/0x80 child_rip+0xa/0x12 ? restore_args+0x0/0x30 ? kthread+0x0/0x80 ? child_rip+0x0/0x12 RIP list_del+0x48/0x70 The problem is that pktgen_thread_worker can not be executed if kthread_stop has been called too early. Insert a completion on the normal initialization path to make sure that pktgen_thread_worker will gain the control for sure. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: assign PDE->data before gluing PDE into /proc treeDenis V. Lunev2008-05-021-8/+4
| | | | | | | | | Simply replace proc_create and further data assigned with proc_create_data. Additionally, there is no need to assign NULL to PDE->data after creation, /proc generic has already done this for us. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki2008-03-261-1/+1
| | | | | | | | Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
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