[PATCH net-next 0/6] net/tls: add ctrl path tracing and statistics

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Hi!

This set adds trace events related to TLS offload and basic MIB stats
for TLS.

First patch contains the TLS offload related trace points. Those are
helpful in troubleshooting offload issues, especially around the
resync paths.

Second patch adds a tracepoint to the fastpath of device offload,
it's separated out in case there will be objections to adding
fast path tracepoints. Again, it's quite useful for debugging
offload issues.

Next four patches add MIB statistics. The statistics are implemented
as per-cpu per-netns counters. Since there are currently no fast path
statistics we could move to atomic variables. Per-CPU seem more common.

Most basic statistics are number of created and live sessions, broken
out to offloaded and non-offloaded. Users seem to like those a lot.

Next there is a statistic for decryption errors. These are primarily
useful for device offload debug, in normal deployments decryption
errors should not be common.

Last but not least a counter for device RX resync.

Jakub Kicinski (6):
  net/tls: add tracing for device/offload events
  net/tls: add device decrypted trace point
  net/tls: add skeleton of MIB statistics
  net/tls: add statistics for installed sessions
  net/tls: add TlsDecryptError stat
  net/tls: add TlsDeviceRxResync statistic

 Documentation/networking/tls.rst              |  30 +++
 .../ethernet/netronome/nfp/nfp_net_common.c   |   3 +-
 include/net/netns/mib.h                       |   3 +
 include/net/snmp.h                            |   6 +
 include/net/tls.h                             |  21 +-
 include/uapi/linux/snmp.h                     |  17 ++
 net/tls/Makefile                              |   4 +-
 net/tls/tls_device.c                          |  36 +++-
 net/tls/tls_main.c                            |  60 +++++-
 net/tls/tls_proc.c                            |  47 ++++
 net/tls/tls_sw.c                              |   5 +
 net/tls/trace.c                               |  10 +
 net/tls/trace.h                               | 202 ++++++++++++++++++
 13 files changed, 429 insertions(+), 15 deletions(-)
 create mode 100644 net/tls/tls_proc.c
 create mode 100644 net/tls/trace.c
 create mode 100644 net/tls/trace.h

-- 
2.21.0