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Message-ID: <20241018202252.693462-2-jolsa@kernel.org>
Date: Fri, 18 Oct 2024 22:22:51 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: 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>
Cc: 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: [PATCHv8 perf/core 1/2] uprobe: Add data pointer to consumer handlers
Adding data pointer to both entry and exit consumer handlers and all
its users. The functionality itself is coming in following change.
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
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