On Mon, Aug 08, 2022 at 11:34:58PM -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. > > Differences from v2: > > - Supports tid, tgid, and pidfd. > > - Change 'type' from __u8 to enum bpf_task_iter_type. hi, I'm getting test fail: test_task_:PASS:bpf_iter_task__open_and_load 0 nsec test_task_:PASS:pthread_mutex_init 0 nsec test_task_:PASS:pthread_mutex_lock 0 nsec test_task_:PASS:pthread_create 0 nsec do_dummy_read:PASS:attach_iter 0 nsec do_dummy_read:PASS:create_iter 0 nsec do_dummy_read:PASS:read 0 nsec test_task_:PASS:pthread_mutex_unlock 0 nsec test_task_:FAIL:check_num_unknown_tid unexpected check_num_unknown_tid: actual 0 != expected 1 test_task_:PASS:check_num_known_tid 0 nsec test_task_:PASS:pthread_join 0 nsec test_task_:PASS:bpf_iter_task__open_and_load 0 nsec test_task_:PASS:pthread_mutex_init 0 nsec test_task_:PASS:pthread_mutex_lock 0 nsec test_task_:PASS:pthread_create 0 nsec do_dummy_read:PASS:attach_iter 0 nsec do_dummy_read:PASS:create_iter 0 nsec do_dummy_read:PASS:read 0 nsec test_task_:PASS:pthread_mutex_unlock 0 nsec test_task_:FAIL:check_num_unknown_tid unexpected check_num_unknown_tid: actual 134 != expected 1 test_task_:PASS:check_num_known_tid 0 nsec test_task_:PASS:pthread_join 0 nsec #10/5 bpf_iter/task:FAIL jirka > > v2: https://lore.kernel.org/bpf/20220801232649.2306614-1-kuifeng@xxxxxx/ > v1: https://lore.kernel.org/bpf/20220726051713.840431-1-kuifeng@xxxxxx/ > > 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 | 8 + > include/uapi/linux/bpf.h | 43 +++ > kernel/bpf/task_iter.c | 153 +++++++++-- > tools/include/uapi/linux/bpf.h | 43 +++ > .../selftests/bpf/prog_tests/bpf_iter.c | 251 ++++++++++++++++-- > .../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, 474 insertions(+), 48 deletions(-) > > -- > 2.30.2 >
