Eric Lee / smarc-fsl-linux-kernel

25 Aug, 2020

1 commit

  • 3677d0a13   samples: bpf: Refactor kprobe tracing programs with libbpf ... Browse Code »

    For the problem of increasing fragmentation of the bpf loader programs,
    instead of using bpf_loader.o, which is used in samples/bpf, this
    commit refactors the existing kprobe tracing programs with libbbpf
    bpf loader.

    - For kprobe events pointing to system calls, the SYSCALL() macro in
    trace_common.h was used.
    - Adding a kprobe event and attaching a bpf program to it was done
    through bpf_program_attach().
    - Instead of using the existing BPF MAP definition, MAP definition
    has been refactored with the new BTF-defined MAP format.

    Signed-off-by: Daniel T. Lee
    Signed-off-by: Alexei Starovoitov
    Link: https://lore.kernel.org/bpf/20200823085334.9413-3-danieltimlee@gmail.com

    Daniel T. Lee
     

21 Jan, 2020

1 commit

  • 7cf245a37   samples/bpf: Use consistent include paths for libbpf ... Browse Code »

    Fix all files in samples/bpf to include libbpf header files with the bpf/
    prefix, to be consistent with external users of the library. Also ensure
    that all includes of exported libbpf header files (those that are exported
    on 'make install' of the library) use bracketed includes instead of quoted.

    To make sure no new files are introduced that doesn't include the bpf/
    prefix in its include, remove tools/lib/bpf from the include path entirely,
    and use tools/lib instead.

    Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
    Signed-off-by: Toke Høiland-Jørgensen
    Signed-off-by: Alexei Starovoitov
    Acked-by: Jesper Dangaard Brouer
    Acked-by: Andrii Nakryiko
    Link: https://lore.kernel.org/bpf/157952560911.1683545.8795966751309534150.stgit@toke.dk

    Toke Høiland-Jørgensen
     

09 Oct, 2019

1 commit

07 Apr, 2016

1 commit

  • 138d6153a   samples/bpf: Enable powerpc support ... Browse Code »

    Add the necessary definitions for building bpf samples on ppc.

    Since ppc doesn't store function return address on the stack, modify how
    PT_REGS_RET() and PT_REGS_FP() work.

    Also, introduce PT_REGS_IP() to access the instruction pointer.

    Cc: Alexei Starovoitov
    Cc: Daniel Borkmann
    Cc: David S. Miller
    Cc: Ananth N Mavinakayanahalli
    Cc: Michael Ellerman
    Signed-off-by: Naveen N. Rao
    Acked-by: Alexei Starovoitov
    Signed-off-by: David S. Miller

    Naveen N. Rao
     

09 Mar, 2016

2 commits

  • 7dcc42b68   samples/bpf: stress test bpf_get_stackid ... Browse Code »

    increase stress by also calling bpf_get_stackid() from
    various *spin* functions

    Signed-off-by: Alexei Starovoitov
    Signed-off-by: David S. Miller

    Alexei Starovoitov
     
  • 9d8b612d8   samples/bpf: add bpf map stress test ... Browse Code »

    this test calls bpf programs from different contexts:
    from inside of slub, from rcu, from pretty much everywhere,
    since it kprobes all spin_lock functions.
    It stresses the bpf hash and percpu map pre-allocation,
    deallocation logic and call_rcu mechanisms.
    User space part adding more stress by walking and deleting map elements.

    Note that due to nature bpf_load.c the earlier kprobe+bpf programs are
    already active while loader loads new programs, creates new kprobes and
    attaches them.

    Signed-off-by: Alexei Starovoitov
    Signed-off-by: David S. Miller

    Alexei Starovoitov