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* pkt_sched: sch_htb: Replace HTB_ACCNT() macro with inlinesJarek Poplawski2008-12-04
| | | | | | | Replace HTB_ACCNT() macro with inlines to make it more readable. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_htb: Remove L2T()Jarek Poplawski2008-12-04
| | | | | | | | | | L2T() is currently used only in one place (and has one spurious parameter, btw), so let's: 'get rid of L2T completely, and just use "qdisc_l2t(rate, size)" directly.' - quote & feedback from David S. Miller. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_htb: Clean htb_class prio and quantum fieldsJarek Poplawski2008-12-04
| | | | | | | | | | While implementing htb_parent_to_leaf() there where added backup prio and quantum struct htb_class fields to preserve these values for inner classes in case of their return to leaf. This patch cleans this a bit by removing union leaf duplicates. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_htb: Remove htb_sched nwc_hit fieldJarek Poplawski2008-12-04
| | | | | | | Remove practically unused struct htb_sched nwc_hit field. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_htb: Remove htb_class aprio fieldJarek Poplawski2008-12-04
| | | | | | | Remove practically unused struct htb_class aprio field. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: fix sparse warningHannes Eder2008-11-28
| | | | | | | | | | | Impact: make global function static Fix the following sparse warning: net/sched/sch_api.c:192:14: warning: symbol 'qdisc_match_from_root' was not declared. Should it be static? Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: gen_estimator: Optimize gen_estimator_active()Jarek Poplawski2008-11-26
| | | | | | | | | | | | | Since all other gen_estimator functions use bstats and rate_est params together, and searching for them is optimized now, let's use this also in gen_estimator_active(). The return type of gen_estimator_active() is changed to bool, and gen_find_node() parameters to const, btw. In tcf_act_police_locate() a check for ACT_P_CREATED is added before calling gen_estimator_active(). Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tc: policing requires a rate estimatorStephen Hemminger2008-11-26
| | | | | | | | | | | | Found that while trying average rate policing, it was possible to request average rate policing without a rate estimator. This results in no policing which is harmless but incorrect. Since policing could be setup in two steps, need to check in the kernel. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tc: check for errors in gen_rate_estimator creationStephen Hemminger2008-11-26
| | | | | | | | The functions gen_new_estimator and gen_replace_estimator can return errors, but they were being ignored. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tc: propogate errors from tcf_hash_createStephen Hemminger2008-11-26
| | | | | | | Allow tcf_hash_create to return different errors on estimator failure. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: fix warning in net/sched/sch_hfsc.cIngo Molnar2008-11-25
| | | | | | | | | | | | | | | this warning: net/sched/sch_hfsc.c: In function ‘hfsc_enqueue’: net/sched/sch_hfsc.c:1577: warning: ‘err’ may be used uninitialized in this function triggers because GCC does not recognize the (correct) error flow between hfsc_classify(), 'cl' and 'err'. Annotate it. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_api: Remove qdisc_list_lockJarek Poplawski2008-11-25
| | | | | | | | | | After implementing qdisc->ops->peek() there is no more calling qdisc_tree_decrease_qlen() without rtnl_lock(), so qdisc_list_lock added by commit: f6e0b239a2657ea8cb67f0d83d0bfdbfd19a481b "pkt_sched: Fix qdisc list locking" can be removed. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_drr: fix drr_dequeue loop()Patrick McHardy2008-11-24
| | | | | | | | | | | | | | | | Jarek Poplawski points out: If all child qdiscs of sch_drr are non-work-conserving (e.g. sch_tbf) drr_dequeue() will busy-loop waiting for skbs instead of leaving the job for a watchdog. Checking for list_empty() in each loop isn't necessary either, because this can never be true except the first time. Using non-work-conserving qdiscs as children of DRR makes no sense, simply bail out in that case. Reported-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: sch_drr: Fix qlen in drr_drop()Jarek Poplawski2008-11-21
| | | | | | Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2008-11-20
|\ | | | | | | | | | | | | | | | | | | 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
| * pkt_sched: fix missing check for packet overrun in qdisc_dump_stab()Patrick McHardy2008-11-20
| | | | | | | | | | | | | | nla_nest_start() might return NULL, causing a NULL pointer dereference. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * net: Do not fire linkwatch events until the device is registered.David S. Miller2008-11-19
| | | | | | | | | | | | | | | | | | Several device drivers try to do things like netif_carrier_off() before register_netdev() is invoked. This is bogus, but too many drivers do this to fix them all up in one go. Reported-by: Folkert van Heusden <folkert@vanheusden.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: remove unnecessary xchg() in packet classifiersPatrick McHardy2008-11-20
| | | | | | | | | | | | | | | | | | | | | | The use of xchg() hasn't been necessary since 2.2.something when proper locking was added to packet schedulers. In the case of classifiers they mostly weren't even necessary before that since they're mainly used to assign a NULL pointer to the filter root in the ->destroy path; the root is destroyed immediately after that. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: remove unnecessary xchg() in packet schedulersPatrick McHardy2008-11-20
| | | | | | | | | | | | | | | | | | The use of xchg() hasn't been necessary since 2.2.something when proper locking was added to packet schedulers. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: add DRR schedulerPatrick McHardy2008-11-20
| | | | | | | | | | | | | | | | | | | | | | | | Add classful DRR scheduler as a more flexible replacement for SFQ. The main difference to the algorithm described in "Efficient Fair Queueing using Deficit Round Robin" is that this implementation doesn't drop packets from the longest queue on overrun because its classful and limits are handled by each individual child qdisc. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netdev: network device operations infrastructureStephen Hemminger2008-11-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the network device internal API to move adminstrative operations out of the network device structure and into a separate structure. This patch involves some hackery to maintain compatablity between the new and old model, so all 300+ drivers don't have to be changed at once. For drivers that aren't converted yet, the netdevice_ops virt function list still resides in the net_device structure. For old protocols, the new net_device_ops are copied out to the old net_device pointers. After the transistion is completed the nag message can be changed to an WARN_ON, and the compatiablity code can be made configurable. Some function pointers aren't moved: * destructor can't be in net_device_ops because it may need to be referenced after the module is unloaded. * neighbor setup is manipulated in a couple of places that need special consideration * hard_start_xmit is in the fast path for transmit. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ematch: simpler tcf_em_unregister()Alexey Dobriyan2008-11-17
| | | | | | | | | | | | | | Simply delete ops from list and let list debugging do the job. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Remove qdisc->ops->requeue() etc.Jarek Poplawski2008-11-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After implementing qdisc->ops->peek() and changing sch_netem into classless qdisc there are no more qdisc->ops->requeue() users. This patch removes this method with its wrappers (qdisc_requeue()), and also unused qdisc->requeue structure. There are a few minor fixes of warnings (htb_enqueue()) and comments btw. The idea to kill ->requeue() and a similar patch were first developed by David S. Miller. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Control group classifierThomas Graf2008-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The classifier should cover the most common use case and will work without any special configuration. The principle of the classifier is to directly access the task_struct via get_current(). In order for this to work, classification requests from softirqs must be ignored. This is not a problem because the vast majority of packets in softirq context are not assigned to a task anyway. For this to work, a mechanism is needed to trace softirq context. This repost goes back to the method of relying on the number of nested bh disable calls for the sake of not adding too much complexity and the option to come up with something more reliable if actually needed. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netem: eliminate unneeded return valuesStephen Hemminger2008-11-04
| | | | | | | | | | | | | | | | All these individual parsing functions never return an error, so they can be void. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: sch_generic: Kfree gso_skb in qdisc_reset()Jarek Poplawski2008-11-03
| | | | | | | | | | | | | | | | | | | | | | Since gso_skb is re-used for qdisc_peek_dequeued(), and this skb is counted in the qdisc->q.qlen, it has to be kfreed during qdisc_reset() when qlen is zeroed. With help from David S. Miller <davem@davemloft.net> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sch_netem: Replace ->requeue() method with open codeJarek Poplawski2008-11-02
| | | | | | | | | | | | | | | | | | | | | | | | After removing netem classful functionality we are sure its inner qdisc is tfifo, so we can replace qdisc->ops->requeue() method with open code. After this patch there are no more ops->requeue() users. The idea of this patch is by Patrick McHardy. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sch_netem: Remove classful functionalityJarek Poplawski2008-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patrick McHardy noticed that: "a lot of the functionality of netem requires the inner tfifo anyways and rate-limiting is usually done on top of netem. So I would suggest so either hard-wire the tfifo qdisc or at least make the assumption that inner qdiscs are work-conserving.", and later: "- a lot of other qdiscs still don't work as inner qdiscs of netem [...]". So, according to his suggestion, this patch removes classful options of netem. The main reason of this change is to remove ops->requeue() method, which is currently used only by netem. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Add peek emulation for non-work-conserving qdiscs.Jarek Poplawski2008-10-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds qdisc_peek_dequeued() wrapper to emulate peek method with qdisc->dequeue() and storing "peeked" skb in qdisc->gso_skb until dequeuing. This is mainly for compatibility reasons not to break some strange configs because peeking is expected for non-work-conserving parent qdiscs to query work-conserving child qdiscs. This implementation requires using qdisc_dequeue_peeked() wrapper instead of directly calling qdisc->dequeue() for all qdiscs ever querried with qdisc->ops->peek() or qdisc_peek_dequeued(). Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Use qdisc->ops->peek() instead of ->dequeue() & ->requeue()Jarek Poplawski2008-10-31
| | | | | | | | | | | | | | | | | | | | Use qdisc->ops->peek() instead of ->dequeue() & ->requeue() pair. After this patch the only remaining user of qdisc->ops->requeue() is netem_enqueue(). Based on ideas of Herbert Xu, Patrick McHardy and David S. Miller. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Add qdisc->ops->peek() implementation.Jarek Poplawski2008-10-31
| | | | | | | | | | | | | | | | Add qdisc->ops->peek() implementation for work-conserving qdiscs. With feedback from Patrick McHardy. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: sch_generic: Add generic qdisc->ops->peek() implementation.Jarek Poplawski2008-10-31
| | | | | | | | | | | | | | With feedback from Patrick McHardy. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Add ->peek() methods for fifo, prio and SFQ qdiscs.Patrick McHardy2008-10-31
|/ | | | | | | | | | | | | | | From: Patrick McHardy <kaber@trash.net> Just as a demonstration how easy adding a peek operation to the work-conserving qdiscs actually is. It doesn't need to keep or change any internal state in many cases thanks to the guarantee that the packet will either be dequeued or, if another packet arrives, the upper qdisc will immediately ->peek again to reevaluate the state. (This is only slightly modified Patrick's patch.) Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2Thomas Gleixner2008-10-22
|\ | | | | | | | | | | | | | | Conflicts: kernel/time/tick-sched.c Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * Merge commit 'linus/master' into merge-linusArjan van de Ven2008-10-17
| |\ | | | | | | | | | | | | | | | Conflicts: arch/x86/kvm/i8254.c
| * | hrtimer: convert net::sched_cbq to the new hrtimer apisArjan van de Ven2008-09-06
| | | | | | | | | | | | | | | | | | | | | | | | In order to be able to do range hrtimers we need to use accessor functions to the "expire" member of the hrtimer struct. This patch converts sched_cbq to these accessors. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
* | | pkt_sched: sch_generic: Fix oops in sch_teqlJarek Poplawski2008-10-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After these commands: # modprobe sch_teql # tc qdisc add dev eth0 root teql0 # tc qdisc del dev eth0 root we get an oops in teql_destroy() when spin_lock is taken from a null qdisc_sleeping pointer. It's because at the moment teql0 dev haven't been activated yet, and a qdisc_root_sleeping() is pointing to noop qdisc's netdev_queue with qdisc_sleeping uninitialized. This patch fixes this both for noop and noqueue netdev_queues to avoid similar problems in the future. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: Remove CONFIG_KMOD from net/ (towards removing CONFIG_KMOD entirely)Johannes Berg2008-10-16
| |/ |/| | | | | | | | | | | | | | | | | | | Some code here depends on CONFIG_KMOD to not try to load protocol modules or similar, replace by CONFIG_MODULES where more than just request_module depends on CONFIG_KMOD and and also use try_then_request_module in ebtables. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Update qdisc requeue stats in dev_requeue_skb()Jarek Poplawski2008-10-08
| | | | | | | | | | | | | | | | | | | | | | After the last change of requeuing there is no info about such incidents in tc stats. This patch updates the counter, but we should consider this should differ from previous stats because of additional checks preventing to repeat this. On the other hand, previous stats didn't include requeuing of gso_segmented skbs. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netfilter: xtables: provide invoked family value to extensionsJan Engelhardt2008-10-08
| | | | | | | | | | | | | | | | | | By passing in the family through which extensions were invoked, a bit of data space can be reclaimed. The "family" member will be added to the parameter structures and the check functions be adjusted. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
* | netfilter: xtables: move extension arguments into compound structure (6/6)Jan Engelhardt2008-10-08
| | | | | | | | | | | | | | This patch does this for target extensions' destroy functions. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
* | netfilter: xtables: move extension arguments into compound structure (5/6)Jan Engelhardt2008-10-08
| | | | | | | | | | | | | | This patch does this for target extensions' checkentry functions. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
* | netfilter: xtables: move extension arguments into compound structure (4/6)Jan Engelhardt2008-10-08
| | | | | | | | | | | | | | This patch does this for target extensions' target functions. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
* | netfilter: xtables: do centralized checkentry call (1/2)Jan Engelhardt2008-10-08
| | | | | | | | | | | | | | | | It used to be that {ip,ip6,etc}_tables called extension->checkentry themselves, but this can be moved into the xtables core. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
* | pkt_sched: Simplify dev_requeue_skb and dequeue_skbJarek Poplawski2008-10-06
| | | | | | | | | | | | | | | | | | | | | | qdisc->requeue was planned to universally replace all requeuing code, but at the top level we never requeue more than one skb, so qdisc-> gso_skb is enough for this. qdisc->requeue would be used on the lower levels only for one level deep requeuing (like in sch_hfsc) after finishing all the changes. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Fix handling of gso skbs on requeuingJarek Poplawski2008-10-06
| | | | | | | | | | | | | | | | | | | | | | Jay Cliburn noticed and diagnosed a bug triggered in dev_gso_skb_destructor() after last change from qdisc->gso_skb to qdisc->requeue list. Since gso_segmented skbs can't be queued to another list this patch brings back qdisc->gso_skb for them. Reported-by: Jay Cliburn <jcliburn@gmail.com> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Check the state of tx_queue in dequeue_skb()Jarek Poplawski2008-09-23
| | | | | | | | | | | | | | | | | | Check in dequeue_skb() the state of tx_queue for requeued skb to save on locking and re-requeuing, and possibly remove the current check in qdisc_run(). Based on the idea of Alexander Duyck. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Always use q->requeue in dev_requeue_skb().David S. Miller2008-09-23
| | | | | | | | | | | | | | | | | | | | There is no reason to call into the complicated qdiscs just to remember the last SKB where we found the device blocked. The SKB is outside of the qdiscs realm at this point. Signed-off-by: David S. Miller <davem@davemloft.net>
* | pkt_sched: Make qdisc->gso_skb a list.David S. Miller2008-09-23
| | | | | | | | | | | | | | The idea is that we can use this to get rid of ->requeue(). Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: em_cmp.c use unaligned access helpersHarvey Harrison2008-09-22
| | | | | | | | | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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