On Mon, 2022-08-01 at 16:26 -0700, Kui-Feng Lee wrote: > Allow creating an iterator that loops through resources of one > task/thread. > > People could only create iterators to loop through all resources of > files, vma, and tasks in the system, even though they were interested > in only the > resources of a specific task or process. Passing the addintional > parameters, people can now create an iterator to go through all > resources or only the resources of a task. > > Major Changes: > > - Add new parameters in bpf_iter_link_info to indicate to go through > all tasks or to go through a specific task. > > - Change the implementations of BPF iterators of vma, files, and > tasks to allow going through only the resources of a specific > task. > > - Provide the arguments of parameterized task iterators in > bpf_link_info. The major changes since v1: - Fix the issue of task_seq_get_next() returning NULL for being called twice or more. - Use pidfd instead of pid/tid while keep the 'type'. > > Kui-Feng Lee (3): > bpf: Parameterize task iterators. > bpf: Handle bpf_link_info for the parameterized task BPF iterators. > selftests/bpf: Test parameterized task BPF iterators. > > include/linux/bpf.h | 4 + > include/uapi/linux/bpf.h | 27 ++++ > kernel/bpf/task_iter.c | 103 ++++++++++--- > tools/include/uapi/linux/bpf.h | 27 ++++ > .../selftests/bpf/prog_tests/bpf_iter.c | 143 +++++++++++++++- > -- > .../selftests/bpf/prog_tests/btf_dump.c | 2 +- > .../selftests/bpf/progs/bpf_iter_task.c | 9 ++ > .../selftests/bpf/progs/bpf_iter_task_file.c | 7 + > .../selftests/bpf/progs/bpf_iter_task_vma.c | 6 +- > 9 files changed, 282 insertions(+), 46 deletions(-) >
