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From: Dmitrii Banshchikov <me@ubique.spb.ru>
To: bpf@vger.kernel.org
Cc: Dmitrii Banshchikov <me@ubique.spb.ru>,
	ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
	john.fastabend@gmail.com, kpsingh@chromium.org, rdna@fb.com
Subject: [PATCH v3 bpf-next 0/4] Add support of pointer to struct in global functions
Date: Sat, 13 Feb 2021 00:56:38 +0400
Message-ID: <20210212205642.620788-1-me@ubique.spb.ru> (raw)

This patchset adds support of pointers to type with known size among
global function arguments.

The motivation is to overcome the limit on the maximum number of allowed
arguments and avoid tricky and unoptimal ways of passing arguments.

A referenced type may contain pointers but access via such pointers
cannot be veirified currently.

v2 -> v3
 - Fix reg ID generation
 - Fix commit description
 - Fix typo
 - Fix tests

v1 -> v2:
 - Allow pointer to any type with known size rather than struct only
 - Allow pointer in global functions only
 - Add more tests
 - Fix wrapping and v1 comments

Dmitrii Banshchikov (4):
  bpf: Rename bpf_reg_state variables
  bpf: Extract nullable reg type conversion into a helper function
  bpf: Support pointers in global func args
  selftests/bpf: Add unit tests for pointers in global functions

 include/linux/bpf_verifier.h                  |   2 +
 kernel/bpf/btf.c                              |  71 +++++++---
 kernel/bpf/verifier.c                         | 113 +++++++++++----
 .../bpf/prog_tests/global_func_args.c         |  60 ++++++++
 .../bpf/prog_tests/test_global_funcs.c        |   8 ++
 .../selftests/bpf/progs/test_global_func10.c  |  29 ++++
 .../selftests/bpf/progs/test_global_func11.c  |  19 +++
 .../selftests/bpf/progs/test_global_func12.c  |  21 +++
 .../selftests/bpf/progs/test_global_func13.c  |  24 ++++
 .../selftests/bpf/progs/test_global_func14.c  |  21 +++
 .../selftests/bpf/progs/test_global_func15.c  |  22 +++
 .../selftests/bpf/progs/test_global_func16.c  |  22 +++
 .../selftests/bpf/progs/test_global_func9.c   | 132 ++++++++++++++++++
 .../bpf/progs/test_global_func_args.c         |  91 ++++++++++++
 14 files changed, 588 insertions(+), 47 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/global_func_args.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func10.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func11.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func12.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func13.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func14.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func15.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func16.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func9.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_global_func_args.c

-- 
2.25.1


             reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-12 20:56 Dmitrii Banshchikov [this message]
2021-02-12 20:56 ` [PATCH v3 bpf-next 1/4] bpf: Rename bpf_reg_state variables Dmitrii Banshchikov
2021-02-12 21:11   ` Andrii Nakryiko
2021-02-12 20:56 ` [PATCH v3 bpf-next 2/4] bpf: Extract nullable reg type conversion into a helper function Dmitrii Banshchikov
2021-02-12 21:12   ` Andrii Nakryiko
2021-02-12 20:56 ` [PATCH v3 bpf-next 3/4] bpf: Support pointers in global func args Dmitrii Banshchikov
2021-02-12 21:14   ` Andrii Nakryiko
2021-02-13  2:09   ` Alexei Starovoitov
2021-02-15  6:25     ` Dmitrii Banshchikov
2021-02-12 20:56 ` [PATCH v3 bpf-next 4/4] selftests/bpf: Add unit tests for pointers in global functions Dmitrii Banshchikov
2021-02-12 21:15   ` Andrii Nakryiko
2021-02-23  6:43   ` Andrii Nakryiko
2021-02-23  8:22     ` [PATCH] selftests/bpf: Fix a compiler warning in global func test Dmitrii Banshchikov
2021-02-24 15:50       ` patchwork-bot+netdevbpf

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