Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Anton Protopopov <aspsk@isovalent.com>
To:     Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <martin.lau@linux.dev>,
        Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Stanislav Fomichev <sdf@google.com>,
        Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,
        Brian Vazquez <brianvv@google.com>,
        Hou Tao <houtao1@huawei.com>, Joe Stringer <joe@isovalent.com>,
        bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Anton Protopopov <aspsk@isovalent.com>
Subject: [PATCH bpf-next 0/2] fix setting return values for htab batch ops and docs
Date:   Mon, 17 Jul 2023 11:43:05 +0000
Message-Id: <20230717114307.46124-1-aspsk@isovalent.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This is a small follow up to the conversation with Hou in the following
thread:

  https://lore.kernel.org/bpf/20230705160139.19967-1-aspsk@isovalent.com/T/#u

Namely, the conversation was about that comments in <linux/bpf.h>
describing the return values from the batch operations are not 100%
obvious. I tried to make comments more clear. While doing this I also
found that this is better to patch how __htab_map_lookup_and_delete_batch
sets return values: the output parameter count could be set to non-zero in
case of error, which may confuse some userspace apps (as errno && non-zero
counter is considered a partially successful operation for batch ops).

Anton Protopopov (2):
  bpf: fix setting return values for htab batch ops
  bpf: update uapi/linux/bpf.h docs on the batch map ops

 include/uapi/linux/bpf.h | 22 ++++++++++++----------
 kernel/bpf/hashtab.c     | 14 +++++++-------
 2 files changed, 19 insertions(+), 17 deletions(-)

-- 
2.34.1