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Message-Id: <20190715163956.204061-1-sdf@google.com>
Date: Mon, 15 Jul 2019 09:39:51 -0700
From: Stanislav Fomichev <sdf@...gle.com>
To: netdev@...r.kernel.org, bpf@...r.kernel.org
Cc: davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
Stanislav Fomichev <sdf@...gle.com>, Yonghong Song <yhs@...com>
Subject: [PATCH bpf 0/5] bpf: allow wide (u64) aligned loads for some fields
of bpf_sock_addr
When fixing selftests by adding support for wide stores, Yonghong
reported that he had seen some examples where clang generates
single u64 loads for two adjacent u32s as well:
http://lore.kernel.org/netdev/a66c937f-94c0-eaf8-5b37-8587d66c0c62@fb.com
Let's support aligned u64 reads for some bpf_sock_addr fields
as well.
(This can probably wait for bpf-next, I'll defer to Younhong and the
maintainers.)
Cc: Yonghong Song <yhs@...com>
Stanislav Fomichev (5):
bpf: rename bpf_ctx_wide_store_ok to bpf_ctx_wide_access_ok
bpf: allow wide aligned loads for bpf_sock_addr user_ip6 and
msg_src_ip6
selftests/bpf: rename verifier/wide_store.c to verifier/wide_access.c
selftests/bpf: add selftests for wide loads
bpf: sync bpf.h to tools/
include/linux/filter.h | 2 +-
include/uapi/linux/bpf.h | 4 +-
net/core/filter.c | 24 ++++--
tools/include/uapi/linux/bpf.h | 4 +-
.../selftests/bpf/verifier/wide_access.c | 73 +++++++++++++++++++
.../selftests/bpf/verifier/wide_store.c | 36 ---------
6 files changed, 95 insertions(+), 48 deletions(-)
create mode 100644 tools/testing/selftests/bpf/verifier/wide_access.c
delete mode 100644 tools/testing/selftests/bpf/verifier/wide_store.c
--
2.22.0.510.g264f2c817a-goog
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