From: Jiri Olsa <jolsa@redhat.com>
To: Martin KaFai Lau <kafai@fb.com>
Cc: "Jiri Olsa" <jolsa@kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
"Andrii Nakryiko" <andriin@fb.com>, "Yonghong Song" <yhs@fb.com>,
"Song Liu" <songliubraving@fb.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"David Miller" <davem@redhat.com>,
"Björn Töpel" <bjorn.topel@intel.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Jesper Dangaard Brouer" <hawk@kernel.org>,
"Arnaldo Carvalho de Melo" <acme@redhat.com>
Subject: Re: [PATCH 12/18] bpf: Add trampolines to kallsyms
Date: Thu, 27 Feb 2020 09:08:05 +0100 [thread overview]
Message-ID: <20200227080805.GA34774@krava> (raw)
In-Reply-To: <20200227062640.4srlnkxvtw34jml7@kafai-mbp>
On Wed, Feb 26, 2020 at 10:26:40PM -0800, Martin KaFai Lau wrote:
SNIP
> > + ksym->start = (unsigned long) data;
> > + ksym->end = ksym->start + BPF_IMAGE_SIZE;
> > + bpf_ksym_add(ksym);
> > + perf_event_ksymbol(PERF_RECORD_KSYMBOL_TYPE_BPF, ksym->start,
> > + BPF_IMAGE_SIZE, false, ksym->name);
> > +}
> > +
> > +void bpf_image_ksym_del(struct bpf_ksym *ksym)
> > +{
> > + bpf_ksym_del(ksym);
> > + perf_event_ksymbol(PERF_RECORD_KSYMBOL_TYPE_BPF, ksym->start,
> > + BPF_IMAGE_SIZE, true, ksym->name);
> > +}
> > +
> > struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
> > {
> > struct bpf_trampoline *tr;
> > @@ -131,6 +148,7 @@ struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
> > for (i = 0; i < BPF_TRAMP_MAX; i++)
> > INIT_HLIST_HEAD(&tr->progs_hlist[i]);
> > tr->image = image;
> > + INIT_LIST_HEAD_RCU(&tr->ksym.lnode);
> > out:
> > mutex_unlock(&trampoline_mutex);
> > return tr;
> > @@ -267,6 +285,14 @@ static enum bpf_tramp_prog_type bpf_attach_type_to_tramp(enum bpf_attach_type t)
> > }
> > }
> >
> > +static void bpf_trampoline_ksym_add(struct bpf_trampoline *tr)
> > +{
> > + struct bpf_ksym *ksym = &tr->ksym;
> > +
> > + snprintf(ksym->name, KSYM_NAME_LEN, "bpf_trampoline_%llu", tr->key);
> Do you have plan to support struct_ops which is also using
> trampoline (in bpf_struct_ops_map_update_elem())?
> Any idea on the name? bpf_struct_ops_<map_id>?
right, I was wondering we should also do that,
I'll check on it
jirka
next prev parent reply other threads:[~2020-02-27 8:08 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 13:03 [PATCHv3 00/18] bpf: Add trampoline and dispatcher to /proc/kallsyms Jiri Olsa
2020-02-26 13:03 ` [PATCH 01/18] x86/mm: Rename is_kernel_text to __is_kernel_text Jiri Olsa
2020-02-26 18:44 ` Song Liu
2020-02-26 13:03 ` [PATCH 02/18] bpf: Add bpf_trampoline_ name prefix for DECLARE_BPF_DISPATCHER Jiri Olsa
2020-02-26 18:54 ` Song Liu
2020-02-26 13:03 ` [PATCH 03/18] bpf: Add struct bpf_ksym Jiri Olsa
2020-02-26 19:01 ` Song Liu
2020-02-26 13:03 ` [PATCH 04/18] bpf: Add name to " Jiri Olsa
2020-02-26 21:14 ` Song Liu
2020-02-27 8:50 ` Jiri Olsa
2020-02-27 18:59 ` Song Liu
2020-03-01 18:31 ` Jiri Olsa
2020-02-26 13:03 ` [PATCH 05/18] bpf: Add lnode list node " Jiri Olsa
2020-02-26 22:51 ` Song Liu
2020-02-27 8:15 ` Jiri Olsa
2020-02-26 13:03 ` [PATCH 06/18] bpf: Add bpf_ksym_tree tree Jiri Olsa
2020-02-26 23:10 ` Song Liu
2020-02-26 13:03 ` [PATCH 07/18] bpf: Move bpf_tree add/del from bpf_prog_ksym_node_add/del Jiri Olsa
2020-02-26 23:12 ` Song Liu
2020-02-26 13:03 ` [PATCH 08/18] bpf: Separate kallsyms add/del functions Jiri Olsa
2020-02-26 23:14 ` Song Liu
2020-02-26 13:03 ` [PATCH 09/18] bpf: Add bpf_ksym_add/del functions Jiri Olsa
2020-02-26 23:16 ` Song Liu
2020-02-26 13:03 ` [PATCH 10/18] bpf: Re-initialize lnode in bpf_ksym_del Jiri Olsa
2020-02-26 23:21 ` Song Liu
2020-02-27 19:50 ` Alexei Starovoitov
2020-02-28 12:17 ` Jiri Olsa
2020-02-28 13:18 ` Arnaldo Carvalho de Melo
2020-02-28 13:16 ` Arnaldo Carvalho de Melo
2020-02-26 13:03 ` [PATCH 11/18] bpf: Rename bpf_tree to bpf_progs_tree Jiri Olsa
2020-02-26 23:22 ` Song Liu
2020-02-26 13:03 ` [PATCH 12/18] bpf: Add trampolines to kallsyms Jiri Olsa
2020-02-26 23:36 ` Song Liu
2020-02-27 6:26 ` Martin KaFai Lau
2020-02-27 8:08 ` Jiri Olsa [this message]
2020-02-26 13:03 ` [PATCH 13/18] bpf: Return error value in bpf_dispatcher_update Jiri Olsa
2020-02-26 23:45 ` Song Liu
2020-02-26 13:03 ` [PATCH 14/18] bpf: Add dispatchers to kallsyms Jiri Olsa
2020-02-26 23:48 ` Song Liu
2020-02-26 13:03 ` [PATCH 15/18] bpf: Sort bpf kallsyms symbols Jiri Olsa
2020-02-26 23:57 ` Song Liu
2020-02-26 13:03 ` [PATCH 16/18] perf tools: Synthesize bpf_trampoline/dispatcher ksymbol event Jiri Olsa
2020-02-27 5:50 ` Song Liu
2020-02-28 13:14 ` Arnaldo Carvalho de Melo
2020-02-26 13:03 ` [PATCH 17/18] perf tools: Set ksymbol dso as loaded on arrival Jiri Olsa
2020-02-27 5:52 ` Song Liu
2020-02-28 13:15 ` Arnaldo Carvalho de Melo
2020-02-26 13:03 ` [PATCH 18/18] perf annotate: Add base support for bpf_image Jiri Olsa
2020-02-27 5:54 ` Song Liu
2020-02-28 13:16 ` Arnaldo Carvalho de Melo
-- strict thread matches above, loose matches on Subject: below --
2020-02-16 19:29 [PATCHv2 00/18] bpf: Add trampoline and dispatcher to /proc/kallsyms Jiri Olsa
2020-02-16 19:29 ` [PATCH 12/18] bpf: Add trampolines to kallsyms Jiri Olsa
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