[DTrace-devel] [PATCH v2 0/4] DTrace TCP provider

[Alan Maguire]

This series is a first draft of TCP provider support, where the
probes are implemented via underlying fbt and sdt probes.

Due to the use of the sock/inet_sock_set_state tracepoint, intended
for ~5.15 kernels and later.  Tried replacing this with

fbt::tcp_set_state:entry

but this misses a few state transitions, so stuck with using
the tracepoint.

All tests under test/unittest/tcp pass unmodified on an upstream
(6.15) kernel and 5.15 UEK7U3 kernel.

It implements all documented TCP provider probes:

accept-established, accept-refused, connnect-request,
connect-established, connect-refused, receive, send,
state-change

Changes since RFC:

- fixed issues with test failures on UEK7 due to missing
  SYN_RCV state change
- moved get_member() to dt_cg.c (patch 1)

Alan Maguire (4):
  dtrace: move get_member() to dt_cg.c
  dt_impl: bump number of TSLOTS to 8
  dtrace: add tcp provider
  dtrace: sync dlibs with tcp.d, ip.d and net.d changes

 dlibs/aarch64/5.14/ip.d  |   1 -
 dlibs/aarch64/5.14/net.d |   6 +-
 dlibs/aarch64/5.14/tcp.d |  52 ++---
 dlibs/aarch64/5.16/ip.d  |   1 -
 dlibs/aarch64/5.16/net.d |   6 +-
 dlibs/aarch64/5.16/tcp.d |  52 ++---
 dlibs/aarch64/6.1/ip.d   |   1 -
 dlibs/aarch64/6.1/net.d  |   6 +-
 dlibs/aarch64/6.1/tcp.d  |  52 ++---
 dlibs/aarch64/6.10/ip.d  |   1 -
 dlibs/aarch64/6.10/net.d |   6 +-
 dlibs/aarch64/6.10/tcp.d |  52 ++---
 dlibs/x86_64/5.14/ip.d   |   1 -
 dlibs/x86_64/5.14/net.d  |   6 +-
 dlibs/x86_64/5.14/tcp.d  |  52 ++---
 dlibs/x86_64/5.16/ip.d   |   1 -
 dlibs/x86_64/5.16/net.d  |   6 +-
 dlibs/x86_64/5.16/tcp.d  |  52 ++---
 dlibs/x86_64/6.1/ip.d    |   1 -
 dlibs/x86_64/6.1/net.d   |   6 +-
 dlibs/x86_64/6.1/tcp.d   |  52 ++---
 dlibs/x86_64/6.10/ip.d   |   1 -
 dlibs/x86_64/6.10/net.d  |   6 +-
 dlibs/x86_64/6.10/tcp.d  |  52 ++---
 libdtrace/Build          |   2 +
 libdtrace/dt_cg.c        |  39 ++++
 libdtrace/dt_cg.h        |   2 +
 libdtrace/dt_impl.h      |   2 +-
 libdtrace/dt_prov_ip.c   |  45 +----
 libdtrace/dt_prov_tcp.c  | 405 +++++++++++++++++++++++++++++++++++++++
 libdtrace/dt_provider.c  |   1 +
 libdtrace/dt_provider.h  |   1 +
 libdtrace/ip.d           |   1 -
 libdtrace/net.d          |   6 +-
 libdtrace/tcp.d          |  52 ++---
 35 files changed, 761 insertions(+), 267 deletions(-)
 create mode 100644 libdtrace/dt_prov_tcp.c

-- 
2.39.3