From: "Toke Høiland-Jørgensen" <toke@kernel•org>
To: shaozhengchao <shaozhengchao@huawei•com>,
"bpf@vger•kernel.org" <bpf@vger•kernel.org>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>,
"linux-kernel@vger•kernel.org" <linux-kernel@vger•kernel.org>,
"ast@kernel•org" <ast@kernel•org>,
"daniel@iogearbox•net" <daniel@iogearbox•net>,
"davem@davemloft•net" <davem@davemloft•net>,
"kuba@kernel•org" <kuba@kernel•org>,
"hawk@kernel•org" <hawk@kernel•org>,
"john.fastabend@gmail•com" <john.fastabend@gmail•com>,
"andrii@kernel•org" <andrii@kernel•org>,
"kafai@fb•com" <kafai@fb•com>,
"songliubraving@fb•com" <songliubraving@fb•com>,
"yhs@fb•com" <yhs@fb•com>,
"kpsingh@kernel•org" <kpsingh@kernel•org>
Cc: "weiyongjun (A)" <weiyongjun1@huawei•com>,
yuehaibing <yuehaibing@huawei•com>
Subject: Re: 答复: 答复: [PATCH bpf-next] samples/bpf: check detach prog exist or not in xdp_fwd
Date: Tue, 17 May 2022 11:42:59 +0200 [thread overview]
Message-ID: <877d6kcx5o.fsf@toke.dk> (raw)
In-Reply-To: <942eaafecf074ae8a5bb336c18658453@huawei.com>
> Could I add helper function to implement this function which can check
> the program name and see if it attach to the device.
You just need to call bpf_prog_get_fd_by_id() followed by
bpf_obj_get_info_by_fd(), and the program name will be in info.name.
Here's an example in libxdp where we pull out the prog name:
https://github.com/xdp-project/xdp-tools/blob/master/lib/libxdp/libxdp.c#L1165
-Toke
prev parent reply other threads:[~2022-05-17 9:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-09 0:51 [PATCH bpf-next] samples/bpf: check detach prog exist or not in xdp_fwd Zhengchao Shao
2022-05-09 9:46 ` Toke Høiland-Jørgensen
2022-05-09 10:27 ` 答复: " shaozhengchao
2022-05-09 10:55 ` Toke Høiland-Jørgensen
2022-05-17 2:00 ` 答复: " shaozhengchao
2022-05-17 9:42 ` Toke Høiland-Jørgensen [this message]
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