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From: Martin KaFai Lau <[email protected]>
To: Jens Axboe <[email protected]>, Breno Leitao <[email protected]>
Cc: [email protected], [email protected],
	[email protected], [email protected],
	Kuniyuki Iwashima <[email protected]>,
	Alexander Mikhalitsyn <[email protected]>,
	David Howells <[email protected]>,
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	Alexei Starovoitov <[email protected]>,
	Daniel Borkmann <[email protected]>,
	John Fastabend <[email protected]>,
	Andrii Nakryiko <[email protected]>, Song Liu <[email protected]>,
	Yonghong Song <[email protected]>,
	KP Singh <[email protected]>, Hao Luo <[email protected]>,
	Jiri Olsa <[email protected]>,
	"David S. Miller" <[email protected]>,
	Eric Dumazet <[email protected]>
Subject: Re: [PATCH v7 04/11] net/socket: Break down __sys_getsockopt
Date: Thu, 19 Oct 2023 13:37:51 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 10/19/23 1:04 PM, Jens Axboe wrote:
> On 10/19/23 1:12 PM, Martin KaFai Lau wrote:
>> On 10/16/23 6:47?AM, Breno Leitao wrote:
>>> diff --git a/net/socket.c b/net/socket.c
>>> index 0087f8c071e7..f4c156a1987e 100644
>>> --- a/net/socket.c
>>> +++ b/net/socket.c
>>> @@ -2350,6 +2350,42 @@ SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
>>>    INDIRECT_CALLABLE_DECLARE(bool tcp_bpf_bypass_getsockopt(int level,
>>>                                 int optname));
>>>    +int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>>> +               int optname, sockptr_t optval, sockptr_t optlen)
>>> +{
>>> +    int max_optlen __maybe_unused;
>>> +    const struct proto_ops *ops;
>>> +    int err;
>>> +
>>> +    err = security_socket_getsockopt(sock, level, optname);
>>> +    if (err)
>>> +        return err;
>>> +
>>> +    ops = READ_ONCE(sock->ops);
>>> +    if (level == SOL_SOCKET) {
>>> +        err = sk_getsockopt(sock->sk, level, optname, optval, optlen);
>>> +    } else if (unlikely(!ops->getsockopt)) {
>>> +        err = -EOPNOTSUPP;
>>> +    } else {
>>> +        if (WARN_ONCE(optval.is_kernel || optlen.is_kernel,
>>> +                  "Invalid argument type"))
>>> +            return -EOPNOTSUPP;
>>> +
>>> +        err = ops->getsockopt(sock, level, optname, optval.user,
>>> +                      optlen.user);
>>> +    }
>>> +
>>> +    if (!compat) {
>>> +        max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
>>
>> The max_optlen was done before the above sk_getsockopt. The bpf CI cannot catch it because it cannot apply patch 5 cleanly. I ran the following out of the linux-block tree:
>>
>> $> ./test_progs -t sockopt_sk
>> test_sockopt_sk:PASS:join_cgroup /sockopt_sk 0 nsec
>> run_test:PASS:skel_load 0 nsec
>> run_test:PASS:setsockopt_link 0 nsec
>> run_test:PASS:getsockopt_link 0 nsec
>> (/data/users/kafai/fb-kernel/linux/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c:111: errno: Operation not permitted) Failed to call getsockopt, ret=-1
>> run_test:FAIL:getsetsockopt unexpected error: -1 (errno 1)
>> #217     sockopt_sk:FAIL
> 
> Does it work with this incremental? I can fold that in, will rebase
> anyway to collect acks.

Yes, that should work.

Acked-by: Martin KaFai Lau <[email protected]>

> 
> 
> diff --git a/net/socket.c b/net/socket.c
> index bccd257e13fe..eb6960958026 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -2344,6 +2344,9 @@ int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>   	if (err)
>   		return err;
>   
> +	if (!compat)
> +		max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
> +
>   	ops = READ_ONCE(sock->ops);
>   	if (level == SOL_SOCKET) {
>   		err = sk_getsockopt(sock->sk, level, optname, optval, optlen);
> @@ -2358,12 +2361,10 @@ int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>   				      optlen.user);
>   	}
>   
> -	if (!compat) {
> -		max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
> +	if (!compat)
>   		err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname,
>   						     optval, optlen, max_optlen,
>   						     err);
> -	}
>   
>   	return err;
>   }
> 


  reply	other threads:[~2023-10-19 20:38 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-16 13:47 [PATCH v7 00/11] io_uring: Initial support for {s,g}etsockopt commands Breno Leitao
2023-10-16 13:47 ` [PATCH v7 01/11] bpf: Add sockptr support for getsockopt Breno Leitao
2023-10-19 19:24   ` Martin KaFai Lau
2023-10-16 13:47 ` [PATCH v7 02/11] bpf: Add sockptr support for setsockopt Breno Leitao
2023-10-19 19:32   ` Martin KaFai Lau
2023-10-16 13:47 ` [PATCH v7 03/11] net/socket: Break down __sys_setsockopt Breno Leitao
2023-10-19  0:20   ` Jakub Kicinski
2023-10-19 19:38   ` Martin KaFai Lau
2023-10-16 13:47 ` [PATCH v7 04/11] net/socket: Break down __sys_getsockopt Breno Leitao
2023-10-19  0:20   ` Jakub Kicinski
2023-10-19 19:12   ` Martin KaFai Lau
2023-10-19 20:04     ` Jens Axboe
2023-10-19 20:37       ` Martin KaFai Lau [this message]
2023-10-19 22:32         ` Jens Axboe
2023-10-16 13:47 ` [PATCH v7 05/11] io_uring/cmd: Pass compat mode in issue_flags Breno Leitao
2023-10-16 13:47 ` [PATCH v7 06/11] tools headers: Grab copy of io_uring.h Breno Leitao
     [not found]   ` <[email protected]>
2023-10-17 12:34     ` Breno Leitao
2023-10-16 13:47 ` [PATCH v7 07/11] selftests/net: Extract uring helpers to be reusable Breno Leitao
2023-10-16 13:47 ` [PATCH v7 08/11] io_uring/cmd: return -EOPNOTSUPP if net is disabled Breno Leitao
2023-10-16 13:47 ` [PATCH v7 09/11] io_uring/cmd: Introduce SOCKET_URING_OP_GETSOCKOPT Breno Leitao
2023-10-16 13:47 ` [PATCH v7 10/11] io_uring/cmd: Introduce SOCKET_URING_OP_SETSOCKOPT Breno Leitao
2023-10-16 13:47 ` [PATCH v7 11/11] selftests/bpf/sockopt: Add io_uring support Breno Leitao
2023-10-19 19:51   ` Martin KaFai Lau
2023-10-19 14:58 ` [PATCH v7 00/11] io_uring: Initial support for {s,g}etsockopt commands Jens Axboe
2023-10-19 15:33   ` Jakub Kicinski
2023-10-19 15:40     ` Jens Axboe
2023-10-19 15:41 ` Jens Axboe

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