Eric Lee / smarc-fsl-linux-kernel

19 Jun, 2019

1 commit

  • d2912cb15   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 ... Browse Code »

    Based on 2 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license version 2 as
    published by the free software foundation

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license version 2 as
    published by the free software foundation #

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

    has been chosen to replace the boilerplate/reference in 4122 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Enrico Weigelt
    Reviewed-by: Kate Stewart
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

06 Mar, 2018

1 commit

  • 3427b2ab6   netfilter: make xt_rateest hash table per net ... Browse Code »

    As suggested by Eric, we need to make the xt_rateest
    hash table and its lock per netns to reduce lock
    contentions.

    Cc: Florian Westphal
    Cc: Eric Dumazet
    Cc: Pablo Neira Ayuso
    Signed-off-by: Cong Wang
    Reviewed-by: Eric Dumazet
    Signed-off-by: Pablo Neira Ayuso

    Cong Wang
     

10 Jan, 2017

1 commit

  • ec2318904   xtables: extend matches and targets with .usersize ... Browse Code »

    In matches and targets that define a kernel-only tail to their
    xt_match and xt_target data structs, add a field .usersize that
    specifies up to where data is to be shared with userspace.

    Performed a search for comment "Used internally by the kernel" to find
    relevant matches and targets. Manually inspected the structs to derive
    a valid offsetof.

    Signed-off-by: Willem de Bruijn
    Signed-off-by: Pablo Neira Ayuso

    Willem de Bruijn
     

06 Dec, 2016

1 commit

  • 1c0d32fde   net_sched: gen_estimator: complete rewrite of rate estimators ... Browse Code »

    1) Old code was hard to maintain, due to complex lock chains.
    (We probably will be able to remove some kfree_rcu() in callers)

    2) Using a single timer to update all estimators does not scale.

    3) Code was buggy on 32bit kernel (WRITE_ONCE() on 64bit quantity
    is not supposed to work well)

    In this rewrite :

    - I removed the RB tree that had to be scanned in
    gen_estimator_active(). qdisc dumps should be much faster.

    - Each estimator has its own timer.

    - Estimations are maintained in net_rate_estimator structure,
    instead of dirtying the qdisc. Minor, but part of the simplification.

    - Reading the estimator uses RCU and a seqcount to provide proper
    support for 32bit kernels.

    - We reduce memory need when estimators are not used, since
    we store a pointer, instead of the bytes/packets counters.

    - xt_rateest_mt() no longer has to grab a spinlock.
    (In the future, xt_rateest_tg() could be switched to per cpu counters)

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

11 Jun, 2013

1 commit

  • 45203a3b3   net_sched: add 64bit rate estimators ... Browse Code »

    struct gnet_stats_rate_est contains u32 fields, so the bytes per second
    field can wrap at 34360Mbit.

    Add a new gnet_stats_rate_est64 structure to get 64bit bps/pps fields,
    and switch the kernel to use this structure natively.

    This structure is dumped to user space as a new attribute :

    TCA_STATS_RATE_EST64

    Old tc command will now display the capped bps (to 34360Mbit), instead
    of wrapped values, and updated tc command will display correct
    information.

    Old tc command output, after patch :

    eric:~# tc -s -d qd sh dev lo
    qdisc pfifo 8001: root refcnt 2 limit 1000p
    Sent 80868245400 bytes 1978837 pkt (dropped 0, overlimits 0 requeues 0)
    rate 34360Mbit 189696pps backlog 0b 0p requeues 0

    This patch carefully reorganizes "struct Qdisc" layout to get optimal
    performance on SMP.

    Signed-off-by: Eric Dumazet
    Cc: Ben Hutchings
    Signed-off-by: David S. Miller

    Eric Dumazet
     

29 Jul, 2011

1 commit

12 May, 2010

2 commits

25 Mar, 2010

3 commits

  • 4a5a5c73b   netfilter: xtables: slightly better error reporting ... Browse Code »

    When extended status codes are available, such as ENOMEM on failed
    allocations, or subsequent functions (e.g. nf_ct_get_l3proto), passing
    them up to userspace seems like a good idea compared to just always
    EINVAL.

    Signed-off-by: Jan Engelhardt

    Jan Engelhardt
     
  • bd414ee60   netfilter: xtables: change matches to return error code ... Browse Code »

    The following semantic patch does part of the transformation:
    //
    @ rule1 @
    struct xt_match ops;
    identifier check;
    @@
    ops.checkentry = check;

    @@
    identifier rule1.check;
    @@
    check(...) { }

    @@
    identifier rule1.check;
    @@
    check(...) { }
    //

    Signed-off-by: Jan Engelhardt

    Jan Engelhardt
     
  • b0f38452f   netfilter: xtables: change xt_match.checkentry return type ... Browse Code »

    Restore function signatures from bool to int so that we can report
    memory allocation failures or similar using -ENOMEM rather than
    always having to pass -EINVAL back.

    This semantic patch may not be too precise (checking for functions
    that use xt_mtchk_param rather than functions referenced by
    xt_match.checkentry), but reviewed, it produced the intended result.

    //
    @@
    type bool;
    identifier check, par;
    @@
    -bool check
    +int check
    (struct xt_mtchk_param *par) { ... }
    //

    Signed-off-by: Jan Engelhardt

    Jan Engelhardt
     

22 Jun, 2009

1 commit

  • 4d900f9df   netfilter: xt_rateest: fix comparison with self ... Browse Code »

    As noticed by Török Edwin :

    Compiling the kernel with clang has shown this warning:

    net/netfilter/xt_rateest.c:69:16: warning: self-comparison always results in a
    constant value
    ret &= pps2 == pps2;
    ^
    Looking at the code:
    if (info->flags & XT_RATEEST_MATCH_BPS)
    ret &= bps1 == bps2;
    if (info->flags & XT_RATEEST_MATCH_PPS)
    ret &= pps2 == pps2;

    Judging from the MATCH_BPS case it seems to be a typo, with the intention of
    comparing pps1 with pps2.

    http://bugzilla.kernel.org/show_bug.cgi?id=13535

    Signed-off-by: Patrick McHardy

    Patrick McHardy
     

08 Oct, 2008

5 commits

14 Apr, 2008

1 commit

29 Jan, 2008

1 commit

  • 50c164a81   [NETFILTER]: x_tables: add rateest match ... Browse Code »

    Add rate estimator match. The rate estimator match can match on
    estimated rates by the RATEEST target. It supports matching on
    absolute bps/pps values, comparing two rate estimators and matching
    on the difference between two rate estimators.

    This is what I use to route outgoing data connections from a FTP
    server over two lines based on the available bandwidth:

    # estimate outgoing rates
    iptables -t mangle -A POSTROUTING -o eth0 -j RATEEST --rateest-name eth0 \
    --rateest-interval 250ms \
    --rateest-ewma 0.5s
    iptables -t mangle -A POSTROUTING -o ppp0 -j RATEEST --rateest-name ppp0 \
    --rateest-interval 250ms \
    --rateest-ewma 0.5s

    # mark based on available bandwidth
    iptables -t mangle -A BALANCE -m state --state NEW \
    -m helper --helper ftp \
    -m rateest --rateest-delta \
    --rateest1 eth0 \
    --rateest-bps1 2.5mbit \
    --rateest-gt \
    --rateest2 ppp0 \
    --rateest-bps2 2mbit \
    -j CONNMARK --set-mark 0x1

    iptables -t mangle -A BALANCE -m state --state NEW \
    -m helper --helper ftp \
    -m rateest --rateest-delta \
    --rateest1 ppp0 \
    --rateest-bps1 2mbit \
    --rateest-gt \
    --rateest2 eth0 \
    --rateest-bps2 2.5mbit \
    -j CONNMARK --set-mark 0x2

    iptables -t mangle -A BALANCE -j CONNMARK --restore-mark

    Signed-off-by: Patrick McHardy
    Signed-off-by: David S. Miller

    Patrick McHardy