This set implements a kfunc called bpf_send_signal_task() that is similar to sigqueue() as it can send a signal along with a cookie to a thread or thread group. The send_signal selftest has been updated to also test this new kfunc under all contexts. Changes in v5: v4: https://lore.kernel.org/all/20241008114940.44305-1-puranjay@xxxxxxxxxx/ - Call copy_siginfo() only if work->has_siginfo is true in bpf_send_signal_common() - Add Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx> Changes in v4: v3: https://lore.kernel.org/all/20241007103426.128923-1-puranjay@xxxxxxxxxx/ - Fix the selftest to make it work for big-endian archs. - Fix a build warning on 32-bit archs. - Some style changes and code refactors suggested by Andrii Changes in v3: v2: https://lore.kernel.org/all/20240926115328.105634-1-puranjay@xxxxxxxxxx/ - make the cookie u64 instead of int. - re use code from bpf_send_signal_common Changes in v2: v1: https://lore.kernel.org/bpf/20240724113944.75977-1-puranjay@xxxxxxxxxx/ - Convert to a kfunc - Add mechanism to send a cookie with the signal. Puranjay Mohan (2): bpf: implement bpf_send_signal_task() kfunc selftests/bpf: Augment send_signal test with remote signaling kernel/bpf/helpers.c | 1 + kernel/trace/bpf_trace.c | 53 +++++-- .../selftests/bpf/prog_tests/send_signal.c | 133 +++++++++++++----- .../bpf/progs/test_send_signal_kern.c | 35 ++++- 4 files changed, 176 insertions(+), 46 deletions(-) -- 2.40.1
