From: Ira Weiny <ira.weiny@xxxxxxxxx>
Major issue of the umad buffer usage has been fixed. Easiest way to do this
was to just add a "send" vs "recv" trace point for the read case. I also
placed these traces where they would only fire if there were no errors as the
mad gets requeued in the case of error.
Changing the umad trace points required updating the BPF sample code.
Changes for V7:
Added reviewed by lines
Used rdma_ah_get_dlid() helper (bit cleaner code)
Fix use of user buffer in umad traces
Update BPF sample for new umad traces
Changes for V6:
Changes from V5:
Merge using the trace structe in create_mad_addr_info()
Fixed version for TRACEPOINTS off
Changes for V5:
checkpatch cleanup
Remove if statements and use calls in TP_fast_assign for
cleaner trace code
Changes for V4:
Change dev_name to dev_index
Changes for V3:
Rebased on current RDMA for next
Change license text to SPDX tag
Change dev_name to string from array
Reorder fields for more compact ring buffer utilization
Use a defined roce address type for safer memcpy/memset
Adjust BPF to new umad format
Changes for v2:
Update MAINTAINERS as indicated from Doug
Now CC'ing the Tracing maintainers so they are aware of the additions
[1] https://www.spinics.net/lists/linux-rdma/msg29109.html
Ira Weiny (6):
IB/MAD: Add send path trace points
IB/MAD: Add recv path trace point
IB/MAD: Add agent trace points
IB/UMAD: Add umad trace points
IB/MAD: Add SMP details to MAD tracing
BPF: Add sample code for new ib_umad tracepoint
MAINTAINERS | 4 +
drivers/infiniband/core/mad.c | 48 +++-
drivers/infiniband/core/user_mad.c | 12 +
include/trace/events/ib_mad.h | 390 +++++++++++++++++++++++++++++
include/trace/events/ib_umad.h | 126 ++++++++++
samples/bpf/Makefile | 3 +
samples/bpf/ibumad_kern.c | 144 +++++++++++
samples/bpf/ibumad_user.c | 122 +++++++++
8 files changed, 848 insertions(+), 1 deletion(-)
create mode 100644 include/trace/events/ib_mad.h
create mode 100644 include/trace/events/ib_umad.h
create mode 100644 samples/bpf/ibumad_kern.c
create mode 100644 samples/bpf/ibumad_user.c
--
2.20.1
