netdev - Re: [PATCH v2 1/8] net: expose sock_use_custom_sol

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Date: Tue, 08 Aug 2023 16:12:51 -0400
From: Jeff Moyer <jmoyer@...hat.com>
To: Breno Leitao <leitao@...ian.org>
Cc: Hugo Villeneuve <hugo@...ovil.com>,  sdf@...gle.com,  axboe@...nel.dk,  asml.silence@...il.com,  willemdebruijn.kernel@...il.com,  "David S. Miller" <davem@...emloft.net>,  Eric Dumazet <edumazet@...gle.com>,  Jakub Kicinski <kuba@...nel.org>,  Paolo Abeni <pabeni@...hat.com>,  bpf@...r.kernel.org,  linux-kernel@...r.kernel.org,  netdev@...r.kernel.org,  io-uring@...r.kernel.org
Subject: Re: [PATCH v2 1/8] net: expose sock_use_custom_sol_socket

Breno Leitao <leitao@...ian.org> writes:

> Hello  Hugo,
>
> On Tue, Aug 08, 2023 at 12:13:23PM -0400, Hugo Villeneuve wrote:
>> On Tue,  8 Aug 2023 06:40:41 -0700
>> Breno Leitao <leitao@...ian.org> wrote:
>> 
>> > Exposing function sock_use_custom_sol_socket(), so it could be used by
>> > io_uring subsystem.
>> > 
>> > This function will be used in the function io_uring_cmd_setsockopt() in
>> > the coming patch, so, let's move it to the socket.h header file.
>> 
>> Hi,
>> this description doesn't seem to match the code change below...
>
> I re-read the patch comment and it seems to match what the code does,
> so, probably this description only makes sense to me (?).
>
> That said, hat have you understood from reading the description above?

The comment states the function prototype is moving to socket.h, but the
patch puts it in net.h.

Cheers,
Jeff

>
> Thanks for the review,
>
>> > ---
>> >  include/linux/net.h | 5 +++++
>> >  net/socket.c        | 5 -----
>> >  2 files changed, 5 insertions(+), 5 deletions(-)
>> > 
>> > diff --git a/include/linux/net.h b/include/linux/net.h
>> > index 41c608c1b02c..14a956e4530e 100644
>> > --- a/include/linux/net.h
>> > +++ b/include/linux/net.h
>> > @@ -355,4 +355,9 @@ u32 kernel_sock_ip_overhead(struct sock *sk);
>> >  #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
>> >  	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
>> >  		     name)
>> > +
>> > +static inline bool sock_use_custom_sol_socket(const struct socket *sock)
>> > +{
>> > +	return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags);
>> > +}
>> >  #endif	/* _LINUX_NET_H */
>> > diff --git a/net/socket.c b/net/socket.c
>> > index 1dc23f5298ba..8df54352af83 100644
>> > --- a/net/socket.c
>> > +++ b/net/socket.c
>> > @@ -2216,11 +2216,6 @@ SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
>> >  	return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
>> >  }
>> >  
>> > -static bool sock_use_custom_sol_socket(const struct socket *sock)
>> > -{
>> > -	return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags);
>> > -}
>> > -
>> >  /*
>> >   *	Set a socket option. Because we don't know the option lengths we have
>> >   *	to pass the user mode parameter for the protocols to sort out.
>> > -- 
>> > 2.34.1
>> >