- 27 Jul, 2018 6 commits
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Jakub Kicinski authored
Control queue is fairly low latency, and requires SKB allocations, which means we can't even reach 0.5Msps with perf events. Allow perf events to be delivered to data queues. This allows us to not only use multiple queues, but also receive and deliver to user space more than 5Msps per queue (Xeon E5-2630 v4 2.20GHz, no retpolines). Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Reviewed-by:
Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net>
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Jakub Kicinski authored
In preparation for SKB-less perf event handling make nfp_bpf_event_output() take buffer address and length, not SKB as parameters. Signed-off-by:
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Jakub Kicinski authored
Port id 0xffffffff is reserved for control messages. Allow reception of messages with this id on data queues. Hand off a raw buffer to the higher layer code, without allocating SKB for max efficiency. The RX handle can't modify or keep the buffer, after it returns buffer is handed back over to the NIC RX free buffer list. Signed-off-by:
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Jakub Kicinski authored
Representor packets are received on PF queues with special metadata tag for demux. There is no reason to resolve the representor ID -> netdev after the skb has been allocated. Move the code, this will allow us to handle special FW messages without SKB allocation overhead. Signed-off-by:
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Taeung Song authored
To smoothly test BTF supported binary on samples/bpf, let samples/bpf/Makefile probe llc, pahole and llvm-objcopy for BPF support and use them like tools/testing/selftests/bpf/Makefile changed from the commit c0fa1b6c ("bpf: btf: Add BTF tests"). Signed-off-by:
Taeung Song <treeze.taeung@gmail.com> Acked-by:
Martin KaFai Lau <kafai@fb.com> Reviewed-by:
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Brian Brooks authored
Define u_smp_rmb() and u_smp_wmb() to respective barrier instructions. This ensures the processor will order accesses to queue indices against accesses to queue ring entries. Signed-off-by:
Brian Brooks <brian.brooks@linaro.org> Acked-by:
Björn Töpel <bjorn.topel@intel.com> Signed-off-by:
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- 26 Jul, 2018 1 commit
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Taeung Song authored
For untracked things of tools/bpf, add this. Reviewed-by:
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- 25 Jul, 2018 2 commits
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Jeremy Cline authored
Adjust tcp_client.py and tcp_server.py to work with Python 3 by using the print function, marking string literals as bytes, and using the newer exception syntax. This should be functionally equivalent and supports Python 3+. Signed-off-by:
Jeremy Cline <jcline@redhat.com> Signed-off-by:
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YueHaibing authored
Fix inconsistent IS_ERR and PTR_ERR in get_btf, the proper pointer to be passed as argument is '*btf' This issue was detected with the help of Coccinelle. Fixes: 2d3feca8 ("bpf: btf: print map dump and lookup with btf info") Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Acked-by:
David S. Miller <davem@davemloft.net> Acked-by:
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- 24 Jul, 2018 31 commits
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Nishanth Devarajan authored
Skbprio (SKB Priority Queue) is a queueing discipline that prioritizes packets according to their skb->priority field. Under congestion, already-enqueued lower priority packets will be dropped to make space available for higher priority packets. Skbprio was conceived as a solution for denial-of-service defenses that need to route packets with different priorities as a means to overcome DoS attacks. v5 *Do not reference qdisc_dev(sch)->tx_queue_len for setting limit. Instead set default sch->limit to 64. v4 *Drop Documentation/networking/sch_skbprio.txt doc file to move it to tc man page for Skbprio, in iproute2. v3 *Drop max_limit parameter in struct skbprio_sched_data and instead use sch->limit. *Reference qdisc_dev(sch)->tx_queue_len only once, during initialisation for qdisc (previously being referenced every time qdisc changes). *Move qdisc's detailed description from in-code to Documentation/networking. *When qdisc is saturated, enqueue incoming packet first before dequeueing lowest priority packet in queue - improves usage of call stack registers. *Introduce and use overlimit stat to keep track of number of dropped packets. v2 *Use skb->priority field rather than DS field. Rename queueing discipline as SKB Priority Queue (previously Gatekeeper Priority Queue). *Queueing discipline is made classful to expose Skbprio's internal priority queues. Signed-off-by:
Nishanth Devarajan <ndev2021@gmail.com> Reviewed-by:
Sachin Paryani <sachin.paryani@gmail.com> Reviewed-by:
Cody Doucette <doucette@bu.edu> Reviewed-by:
Michel Machado <michel@digirati.com.br> Acked-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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Heiner Kallweit authored
Certain PHY's have issues when operating in GBit slave mode and can be forced to master mode. Examples are RTL8211C, also the Micrel PHY driver has a DT setting to force master mode. If two such chips are link partners the autonegotiation will fail. Standard defines a self-clearing on read, latched-high bit to indicate this error. Check this bit to inform the user. Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
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David S. Miller authored
Stephen Hemminger says: ==================== net whitespace cleanups Ran script that I use to check for trailing whitespace and blank lines at end of files across all files in net/ directory. These are errors that checkpatch reports and git flags. These are the resulting fixes broken up mostly by subsystem. ==================== Signed-off-by: -
Stephen Hemminger authored
Several files have extra line at end of file. Signed-off-by:
Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
Remove trailing whitespace and extra lines at EOF Signed-off-by:
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
Remove blank line at EOF and trailing whitespace. Signed-off-by:
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
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Stephen Hemminger authored
Remove trailing whitespace and blank lines at EOF Signed-off-by:
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Tariq Toukan authored
The cited patch added a call to dev_change_tx_queue_len in SIOCSIFTXQLEN case. This obsoletes the new len comparison check done before the function call. Remove it here. For the desicion of keep/remove the negative value check, we examine the range check in dev_change_tx_queue_len. On 64-bit we will fail with -ERANGE. The 32-bit int ifr_qlen will be sign extended to 64-bits when it is passed into dev_change_tx_queue_len(). And then for negative values this test triggers: if (new_len != (unsigned int)new_len) return -ERANGE; because: if (0xffffffffWHATEVER != 0x00000000WHATEVER) On 32-bit the signed value will be accepted, changing behavior. Therefore, the negative value check is kept. Fixes: 3f76df19 ("net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN") Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Reviewed-by:
Eran Ben Elisha <eranbe@mellanox.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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David S. Miller authored
Rahul Lakkireddy says: ==================== cxgb4: collect free Tx/Rx pages and page pointers Patch 1 collects number of free PSTRUCT page pointers in context memory. Patch 2 moves the collection logic for Tx/Rx free pages to common code, since this information needs to be collected in vmcore device dump as well. ==================== Signed-off-by: -
Rahul Lakkireddy authored
This information needs to be collected in vmcore device dump as well. So, move to common code. Fixes: fa145d5d ("cxgb4: display number of rx and tx pages free") Signed-off-by:
Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by:
Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by:
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Rahul Lakkireddy authored
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David S. Miller authored
Ido Schimmel says: ==================== mlxsw: Add extack messages for tc flower Nir says: This patch set adds extack messages support to tc flower part of mlxsw. The messages provide clear reasoning to failures, as some of the available actions and keys are not supported in driver or HW and resources may get exhausted. The first patch deals with propagation of the extack pointer among the functions dealing with key parsing and action sets handling. Following patches 2-4 add appropriate messages across the different layers of mlxsw tc flower implementation. ==================== Signed-off-by: -
Nir Dotan authored
Return extack messages in order to explain failures of unsupported actions, keys and invalid user input. Signed-off-by:
Nir Dotan <nird@mellanox.com> Reviewed-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
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Nir Dotan authored
Return extack messages for failures in action set creation. Messages provide reasons for not being able to implement the action in HW. Signed-off-by:
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Nir Dotan authored
Return extack messages for failures in action set creation. Errors may occur when action is not currently supported or due to lack of resources. Signed-off-by:
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Nir Dotan authored
Propagate extack pointer in order to add extack messages for ACL. In the follow-up patches, appropriate messages will be added in various points. Signed-off-by:
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Florian Westphal authored
->start() is called once when dump is being initialized, there is no need to store it in netlink_cb. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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David S. Miller authored
Merge tag 'mac80211-next-for-davem-2018-07-24' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== Only a few things: * HE (802.11ax) support in HWSIM * bypass TXQ with NDP frames as they're special * convert ahash -> shash in lib80211 TKIP * avoid playing with tailroom counter defer unless needed to avoid issues in some cases ==================== Signed-off-by:
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Manikanta Pubbisetty authored
As explained in ieee80211_delayed_tailroom_dec(), during roam, keys of the old AP will be destroyed and new keys will be installed. Deletion of the old key causes crypto_tx_tailroom_needed_cnt to go from 1 to 0 and the new key installation causes a transition from 0 to 1. Whenever crypto_tx_tailroom_needed_cnt transitions from 0 to 1, we invoke synchronize_net(); the reason for doing this is to avoid a race in the TX path as explained in increment_tailroom_need_count(). This synchronize_net() operation can be slow and can affect the station roam time. To avoid this, decrementing the crypto_tx_tailroom_needed_cnt is delayed for a while so that upon installation of new key the transition would be from 1 to 2 instead of 0 to 1 and thereby improving the roam time. This is all correct for a STA iftype, but deferring the tailroom_needed decrement for other iftypes may be unnecessary. For example, let's consider the case of a 4-addr client connecting to an AP for which AP_VLAN interface is also created, let the initial value for tailroom_needed on the AP be 1. * 4-addr client connects to the AP (AP: tailroom_needed = 1) * AP will clear old keys, delay decrement of tailroom_needed count * AP_VLAN is created, it takes the tailroom count from master (AP_VLAN: tailroom_needed = 1, AP: tailroom_needed = 1) * Install new key for the station, assume key is plumbed in the HW, there won't be any change in tailroom_needed count on AP iface * Delayed decrement of tailroom_needed count on AP (AP: tailroom_needed = 0, AP_VLAN: tailroom_needed = 1) Because of the delayed decrement on AP iface, tailroom_needed count goes out of sync between AP(master iface) and AP_VLAN(slave iface) and there would be unnecessary tailroom created for the packets going through AP_VLAN iface. Also, WARN_ONs were observed while trying to bring down the AP_VLAN interface: (warn_slowpath_common) (warn_slowpath_null+0x18/0x20) (warn_slowpath_null) (ieee80211_free_keys+0x114/0x1e4) (ieee80211_free_keys) (ieee80211_del_virtual_monitor+0x51c/0x850) (ieee80211_del_virtual_monitor) (ieee80211_stop+0x30/0x3c) (ieee80211_stop) (__dev_close_many+0x94/0xb8) (__dev_close_many) (dev_close_many+0x5c/0xc8) Restricting delayed decrement to station interface alone fixes the problem and it makes sense to do so because delayed decrement is done to improve roam time which is applicable only for client devices. Signed-off-by:
Manikanta Pubbisetty <mpubbise@codeaurora.org> Signed-off-by:
Johannes Berg <johannes.berg@intel.com>
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Kees Cook authored
In preparing to remove all stack VLA usage from the kernel[1], this removes the discouraged use of AHASH_REQUEST_ON_STACK in favor of the smaller SHASH_DESC_ON_STACK by converting from ahash-wrapped-shash to direct shash. The stack allocation will be made a fixed size in a later patch to the crypto subsystem. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.comSigned-off-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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