Oops, I mistakenly send out the zero-patch again. Sorry for that. On 9/30/2021 5:13 PM, Hou Tao wrote: > Hi, > > The patchset series supports writable context for bare tracepoint. > > The main idea comes from patchset "writable contexts for bpf raw > tracepoints" [1], but it only supports normal tracepoint with > associated trace event under tracefs. Now we have one use case > in which we will add bare tracepoint in VFS layer, and update > file::f_mode for specific files. The reason using bare tracepoint > is that it doesn't form a ABI and we can change it freely. So > add support for it in BPF. > > Comments are always welcome. > > [1]: https://lore.kernel.org/lkml/20190426184951.21812-1-mmullins@xxxxxx > > Change log: > v4: > * rebased on bpf-next > * patch 2 is updated to add support for writable raw tracepoint > attachment in attach_raw_tp(). > > v3: https://www.spinics.net/lists/bpf/msg46824.html > * use raw_tp.w instead of raw_tp_writable as section > name of writable tp > * use ASSERT_XXX() instead of CHECK() > * define a common macro for "/sys/kernel/bpf_testmod" > > v2: https://www.spinics.net/lists/bpf/msg46356.html > * rebase on bpf-next tree > * address comments from Yonghong Song > * rename bpf_testmode_test_writable_ctx::ret as early_ret to reflect > its purpose better. > > v1: https://www.spinics.net/lists/bpf/msg46221.html > > Hou Tao (3): > bpf: support writable context for bare tracepoint > libbpf: support detecting and attaching of writable tracepoint program > bpf/selftests: add test for writable bare tracepoint > > include/trace/bpf_probe.h | 19 +++++++--- > tools/lib/bpf/libbpf.c | 21 ++++++++--- > .../bpf/bpf_testmod/bpf_testmod-events.h | 15 ++++++++ > .../selftests/bpf/bpf_testmod/bpf_testmod.c | 10 ++++++ > .../selftests/bpf/bpf_testmod/bpf_testmod.h | 5 +++ > .../selftests/bpf/prog_tests/module_attach.c | 35 +++++++++++++++++++ > .../selftests/bpf/progs/test_module_attach.c | 14 ++++++++ > tools/testing/selftests/bpf/test_progs.c | 4 +-- > tools/testing/selftests/bpf/test_progs.h | 2 ++ > 9 files changed, 114 insertions(+), 11 deletions(-) >
