[PATCH bpf-next v3 0/2] Implement mechanism to signal other threads

From: Puranjay Mohan
Date: Mon Oct 07 2024 - 06:34:56 EST


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 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 | 54 +++++--
.../selftests/bpf/prog_tests/send_signal.c | 133 +++++++++++++-----
.../bpf/progs/test_send_signal_kern.c | 35 ++++-
4 files changed, 177 insertions(+), 46 deletions(-)

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2.40.1