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 want to add a 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. Any comments are welcome. [1]: https://lore.kernel.org/lkml/20190426184951.21812-1-mmullins@xxxxxx Change log: v2: * 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 | 4 +++ .../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 | 36 +++++++++++++++++++ .../selftests/bpf/progs/test_module_attach.c | 14 ++++++++ 7 files changed, 99 insertions(+), 4 deletions(-) -- 2.29.2
