Two important arguments in RTT estimation, mrtt and srtt, are passed to
tcp_bpf_rtt(), so that bpf programs get more information about RTT
computation in BPF_SOCK_OPS_RTT_CB.

The difference between bpf_sock_ops->srtt_us and the srtt here is: the
former is an old rtt before update, while srtt passed by tcp_bpf_rtt()
is that after update.

Signed-off-by: Philo Lu <lulie@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240425161724.73707-2-lulie@linux.alibaba.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

Adding support to attach bpf program for entry and return probe
of the same function. This is common use case which at the moment
requires to create two kprobe multi links.

Adding new BPF_TRACE_KPROBE_SESSION attach type that instructs
kernel to attach single link program to both entry and exit probe.

It's possible to control execution of the bpf program on return
probe simply by returning zero or non zero from the entry bpf
program execution to execute or not the bpf program on return
probe respectively.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240430112830.1184228-2-jolsa@kernel.org

When building either tools/bpf/bpftool, or tools/testing/selftests/hid,
(the same Makefile is used for these), clang generates many instances of
the following:

    "clang: warning: -lLLVM-17: 'linker' input unused"

Quentin points out that the LLVM version is only required in $(LIBS),
not in $(CFLAGS), so the fix is to remove it from CFLAGS.

Suggested-by: Quentin Monnet <qmo@kernel.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/bpf/20240505230054.13813-1-jhubbard@nvidia.com

Pull latest libbpf from mirror.
Libbpf version: 1.5.0
Libbpf commit:  02724cfd0702c4102138e62c3ae7d2721c7b190e

Signed-off-by: Quentin Monnet <qmo@kernel.org>

Syncing latest bpftool commits from kernel repository.
Baseline bpf-next commit:   82e38a505c9868e784ec31e743fd8a9fa5ca1084
Checkpoint bpf-next commit: 009367099eb61a4fc2af44d4eb06b6b4de7de6db
Baseline bpf commit:        5bcf0dcbf9066348058b88a510c57f70f384c92c
Checkpoint bpf commit:      3e9bc0472b910d4115e16e9c2d684c7757cb6c60

Jiri Olsa (1):
  bpf: Add support for kprobe session attach

John Hubbard (1):
  bpftool, selftests/hid/bpf: Fix 29 clang warnings

Philo Lu (1):
  bpf: add mrtt and srtt as BPF_SOCK_OPS_RTT_CB args

 include/uapi/linux/bpf.h | 3 +++
 src/Makefile             | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

Signed-off-by: Quentin Monnet <qmo@kernel.org>