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 v2 bpf-next 0/4] Add support of pointer to struct in global functions
Date: Tue, 9 Feb 2021 10:44:17 +0400 [thread overview]
Message-ID: <20210209064421.15222-1-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.
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 | 56 ++++++++
.../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 | 79 +++++++++++
14 files changed, 572 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
next reply other threads:[~2021-02-09 6:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 6:44 Dmitrii Banshchikov [this message]
2021-02-09 6:44 ` [PATCH v2 bpf-next 1/4] bpf: Rename bpf_reg_state variables Dmitrii Banshchikov
2021-02-10 20:34 ` Andrii Nakryiko
2021-02-09 6:44 ` [PATCH v2 bpf-next 2/4] bpf: Extract nullable reg type conversion into a helper function Dmitrii Banshchikov
2021-02-10 20:39 ` Andrii Nakryiko
2021-02-09 6:44 ` [PATCH v2 bpf-next 3/4] bpf: Support pointers in global func args Dmitrii Banshchikov
2021-02-10 23:32 ` Andrii Nakryiko
2021-02-11 9:23 ` Dmitrii Banshchikov
2021-02-09 6:44 ` [PATCH v2 bpf-next 4/4] selftests/bpf: Add unit tests for pointers in global functions Dmitrii Banshchikov
2021-02-10 23:49 ` Andrii Nakryiko
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