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Message-Id: <20241016072426.c6f7b9572b946dd31c0c1fb8@kernel.org>
Date: Wed, 16 Oct 2024 07:24:26 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Jiri Olsa <jolsa@...nel.org>
Cc: Oleg Nesterov <oleg@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann
<daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
bpf@...r.kernel.org, Martin KaFai Lau <kafai@...com>, Song Liu
<songliubraving@...com>, Yonghong Song <yhs@...com>, John Fastabend
<john.fastabend@...il.com>, KP Singh <kpsingh@...omium.org>, Stanislav
Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, Steven Rostedt
<rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>,
linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCHv6 perf/core 01/16] uprobe: Add data pointer to consumer
handlers
On Thu, 10 Oct 2024 22:09:42 +0200
Jiri Olsa <jolsa@...nel.org> wrote:
> Adding data pointer to both entry and exit consumer handlers and all
> its users. The functionality itself is coming in following change.
>
Looks good to me.
Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Alexei, please merge this series via bpf tree, since most of the patches
in this series are for bpf.
Thank you,
> Acked-by: Oleg Nesterov <oleg@...hat.com>
> Acked-by: Andrii Nakryiko <andrii@...nel.org>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
> include/linux/uprobes.h | 4 ++--
> kernel/events/uprobes.c | 4 ++--
> kernel/trace/bpf_trace.c | 6 ++++--
> kernel/trace/trace_uprobe.c | 12 ++++++++----
> .../testing/selftests/bpf/bpf_testmod/bpf_testmod.c | 2 +-
> 5 files changed, 17 insertions(+), 11 deletions(-)
>
> diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
> index 2b294bf1881f..bb265a632b91 100644
> --- a/include/linux/uprobes.h
> +++ b/include/linux/uprobes.h
> @@ -37,10 +37,10 @@ struct uprobe_consumer {
> * for the current process. If filter() is omitted or returns true,
> * UPROBE_HANDLER_REMOVE is effectively ignored.
> */
> - int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
> + int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs, __u64 *data);
> int (*ret_handler)(struct uprobe_consumer *self,
> unsigned long func,
> - struct pt_regs *regs);
> + struct pt_regs *regs, __u64 *data);
> bool (*filter)(struct uprobe_consumer *self, struct mm_struct *mm);
>
> struct list_head cons_node;
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 2a0059464383..6b44c386a5df 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -2090,7 +2090,7 @@ static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs)
> int rc = 0;
>
> if (uc->handler) {
> - rc = uc->handler(uc, regs);
> + rc = uc->handler(uc, regs, NULL);
> WARN(rc & ~UPROBE_HANDLER_MASK,
> "bad rc=0x%x from %ps()\n", rc, uc->handler);
> }
> @@ -2128,7 +2128,7 @@ handle_uretprobe_chain(struct return_instance *ri, struct pt_regs *regs)
> rcu_read_lock_trace();
> list_for_each_entry_rcu(uc, &uprobe->consumers, cons_node, rcu_read_lock_trace_held()) {
> if (uc->ret_handler)
> - uc->ret_handler(uc, ri->func, regs);
> + uc->ret_handler(uc, ri->func, regs, NULL);
> }
> rcu_read_unlock_trace();
> }
> diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
> index a582cd25ca87..fdab7ecd8dfa 100644
> --- a/kernel/trace/bpf_trace.c
> +++ b/kernel/trace/bpf_trace.c
> @@ -3244,7 +3244,8 @@ uprobe_multi_link_filter(struct uprobe_consumer *con, struct mm_struct *mm)
> }
>
> static int
> -uprobe_multi_link_handler(struct uprobe_consumer *con, struct pt_regs *regs)
> +uprobe_multi_link_handler(struct uprobe_consumer *con, struct pt_regs *regs,
> + __u64 *data)
> {
> struct bpf_uprobe *uprobe;
>
> @@ -3253,7 +3254,8 @@ uprobe_multi_link_handler(struct uprobe_consumer *con, struct pt_regs *regs)
> }
>
> static int
> -uprobe_multi_link_ret_handler(struct uprobe_consumer *con, unsigned long func, struct pt_regs *regs)
> +uprobe_multi_link_ret_handler(struct uprobe_consumer *con, unsigned long func, struct pt_regs *regs,
> + __u64 *data)
> {
> struct bpf_uprobe *uprobe;
>
> diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
> index c40531d2cbad..5895eabe3581 100644
> --- a/kernel/trace/trace_uprobe.c
> +++ b/kernel/trace/trace_uprobe.c
> @@ -89,9 +89,11 @@ static struct trace_uprobe *to_trace_uprobe(struct dyn_event *ev)
> static int register_uprobe_event(struct trace_uprobe *tu);
> static int unregister_uprobe_event(struct trace_uprobe *tu);
>
> -static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs);
> +static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs,
> + __u64 *data);
> static int uretprobe_dispatcher(struct uprobe_consumer *con,
> - unsigned long func, struct pt_regs *regs);
> + unsigned long func, struct pt_regs *regs,
> + __u64 *data);
>
> #ifdef CONFIG_STACK_GROWSUP
> static unsigned long adjust_stack_addr(unsigned long addr, unsigned int n)
> @@ -1517,7 +1519,8 @@ trace_uprobe_register(struct trace_event_call *event, enum trace_reg type,
> }
> }
>
> -static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)
> +static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs,
> + __u64 *data)
> {
> struct trace_uprobe *tu;
> struct uprobe_dispatch_data udd;
> @@ -1548,7 +1551,8 @@ static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)
> }
>
> static int uretprobe_dispatcher(struct uprobe_consumer *con,
> - unsigned long func, struct pt_regs *regs)
> + unsigned long func, struct pt_regs *regs,
> + __u64 *data)
> {
> struct trace_uprobe *tu;
> struct uprobe_dispatch_data udd;
> diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> index 8835761d9a12..12005e3dc3e4 100644
> --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> @@ -461,7 +461,7 @@ static struct bin_attribute bin_attr_bpf_testmod_file __ro_after_init = {
>
> static int
> uprobe_ret_handler(struct uprobe_consumer *self, unsigned long func,
> - struct pt_regs *regs)
> + struct pt_regs *regs, __u64 *data)
>
> {
> regs->ax = 0x12345678deadbeef;
> --
> 2.46.2
>
--
Masami Hiramatsu (Google) <mhiramat@...nel.org>
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