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Sat, 18 Jan 2025 06:56:59 -0800 (PST) From: Jakub Sitnicki To: Jiayuan Chen Cc: bpf@vger.kernel.org, john.fastabend@gmail.com, netdev@vger.kernel.org, martin.lau@linux.dev, ast@kernel.org, edumazet@google.com, davem@davemloft.net, dsahern@kernel.org, kuba@kernel.org, pabeni@redhat.com, linux-kernel@vger.kernel.org, song@kernel.org, andrii@kernel.org, mhal@rbox.co, yonghong.song@linux.dev, daniel@iogearbox.net, xiyou.wangcong@gmail.com, horms@kernel.org, corbet@lwn.net, eddyz87@gmail.com, cong.wang@bytedance.com, shuah@kernel.org, mykolal@fb.com, jolsa@kernel.org, haoluo@google.com, sdf@fomichev.me, kpsingh@kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCH bpf v7 1/5] strparser: add read_sock callback In-Reply-To: <20250116140531.108636-2-mrpre@163.com> (Jiayuan Chen's message of "Thu, 16 Jan 2025 22:05:27 +0800") References: <20250116140531.108636-1-mrpre@163.com> <20250116140531.108636-2-mrpre@163.com> Date: Sat, 18 Jan 2025 15:56:57 +0100 Message-ID: <87ed10dvba.fsf@cloudflare.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Thu, Jan 16, 2025 at 10:05 PM +08, Jiayuan Chen wrote: > Added a new read_sock handler, allowing users to customize read operations > instead of relying on the native socket's read_sock. > > Signed-off-by: Jiayuan Chen > --- > Documentation/networking/strparser.rst | 11 ++++++++++- > include/net/strparser.h | 2 ++ > net/strparser/strparser.c | 11 +++++++++-- > 3 files changed, 21 insertions(+), 3 deletions(-) > > diff --git a/Documentation/networking/strparser.rst b/Documentation/networking/strparser.rst > index 6cab1f74ae05..e41c18eee2f4 100644 > --- a/Documentation/networking/strparser.rst > +++ b/Documentation/networking/strparser.rst > @@ -112,7 +112,7 @@ Functions > Callbacks > ========= > > -There are six callbacks: > +There are seven callbacks: > > :: > > @@ -182,6 +182,15 @@ There are six callbacks: > the length of the message. skb->len - offset may be greater > then full_len since strparser does not trim the skb. > > + :: > + > + int (*read_sock)(struct strparser *strp, read_descriptor_t *desc, > + sk_read_actor_t recv_actor); > + > + read_sock is called when the user specify it, allowing for customized > + read operations. If the callback is not set (NULL in strp_init) native > + read_sock operation of the socket is used. > + Could be one sentence: The read_sock callback is used by strparser instead of sock->ops->read_sock, if provided. > :: > > int (*read_sock_done)(struct strparser *strp, int err); [...]