From: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Florent Revest <revest@chromium.org>
Cc: linux-trace-kernel@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
bpf <bpf@vger.kernel.org>, Sven Schnelle <svens@linux.ibm.com>,
Alexei Starovoitov <ast@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Alan Maguire <alan.maguire@oracle.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>, Guo Ren <guoren@kernel.org>
Subject: [PATCH v4 08/33] ftrace/function_graph: Pass fgraph_ops to function graph callbacks
Date: Fri, 8 Dec 2023 19:25:53 +0900 [thread overview]
Message-ID: <170203115321.579004.17389638059690297680.stgit@devnote2> (raw)
In-Reply-To: <170203105427.579004.8033550792660734570.stgit@devnote2>
From: Steven Rostedt (VMware) <rostedt@goodmis.org>
Pass the fgraph_ops structure to the function graph callbacks. This will
allow callbacks to add a descriptor to a fgraph_ops private field that wil
be added in the future and use it for the callbacks. This will be useful
when more than one callback can be registered to the function graph tracer.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
Changes in v2:
- cleanup to set argument name on function prototype.
---
include/linux/ftrace.h | 10 +++++++---
kernel/trace/fgraph.c | 16 +++++++++-------
kernel/trace/ftrace.c | 6 ++++--
kernel/trace/trace.h | 4 ++--
kernel/trace/trace_functions_graph.c | 11 +++++++----
kernel/trace/trace_irqsoff.c | 6 ++++--
kernel/trace/trace_sched_wakeup.c | 6 ++++--
kernel/trace/trace_selftest.c | 5 +++--
8 files changed, 40 insertions(+), 24 deletions(-)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 8b48fc621ea0..bc216cdc742d 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -1055,11 +1055,15 @@ struct ftrace_graph_ret {
unsigned long long rettime;
} __packed;
+struct fgraph_ops;
+
/* Type of the callback handlers for tracing function graph*/
-typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */
-typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */
+typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *,
+ struct fgraph_ops *); /* return */
+typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *,
+ struct fgraph_ops *); /* entry */
-extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace);
+extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace, struct fgraph_ops *gops);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index 97a9ffb8bb4c..62c35d6d95f9 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -129,13 +129,13 @@ static inline int get_fgraph_array(struct task_struct *t, int offset)
}
/* ftrace_graph_entry set to this to tell some archs to run function graph */
-static int entry_run(struct ftrace_graph_ent *trace)
+static int entry_run(struct ftrace_graph_ent *trace, struct fgraph_ops *ops)
{
return 0;
}
/* ftrace_graph_return set to this to tell some archs to run function graph */
-static void return_run(struct ftrace_graph_ret *trace)
+static void return_run(struct ftrace_graph_ret *trace, struct fgraph_ops *ops)
{
}
@@ -199,12 +199,14 @@ int __weak ftrace_disable_ftrace_graph_caller(void)
}
#endif
-int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
+int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
return 0;
}
-static void ftrace_graph_ret_stub(struct ftrace_graph_ret *trace)
+static void ftrace_graph_ret_stub(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
}
@@ -358,7 +360,7 @@ int function_graph_enter(unsigned long ret, unsigned long func,
atomic_inc(¤t->trace_overrun);
break;
}
- if (fgraph_array[i]->entryfunc(&trace)) {
+ if (fgraph_array[i]->entryfunc(&trace, fgraph_array[i])) {
offset = current->curr_ret_stack;
/* Check the top level stored word */
type = get_fgraph_type(current, offset - 1);
@@ -532,7 +534,7 @@ static unsigned long __ftrace_return_to_handler(struct fgraph_ret_regs *ret_regs
i = 0;
do {
idx = get_fgraph_array(current, offset - i);
- fgraph_array[idx]->retfunc(&trace);
+ fgraph_array[idx]->retfunc(&trace, fgraph_array[idx]);
i++;
} while (i < index);
@@ -674,7 +676,7 @@ void ftrace_graph_sleep_time_control(bool enable)
* Simply points to ftrace_stub, but with the proper protocol.
* Defined by the linker script in linux/vmlinux.lds.h
*/
-extern void ftrace_stub_graph(struct ftrace_graph_ret *);
+void ftrace_stub_graph(struct ftrace_graph_ret *trace, struct fgraph_ops *gops);
/* The callbacks that hook a function */
trace_func_graph_ret_t ftrace_graph_return = ftrace_stub_graph;
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index fd64021ec52f..7ff5c454622a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -815,7 +815,8 @@ void ftrace_graph_graph_time_control(bool enable)
fgraph_graph_time = enable;
}
-static int profile_graph_entry(struct ftrace_graph_ent *trace)
+static int profile_graph_entry(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
struct ftrace_ret_stack *ret_stack;
@@ -832,7 +833,8 @@ static int profile_graph_entry(struct ftrace_graph_ent *trace)
return 1;
}
-static void profile_graph_return(struct ftrace_graph_ret *trace)
+static void profile_graph_return(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
struct ftrace_ret_stack *ret_stack;
struct ftrace_profile_stat *stat;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b7f4ea25a194..d72d5e81f48a 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -675,8 +675,8 @@ void trace_latency_header(struct seq_file *m);
void trace_default_header(struct seq_file *m);
void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
-void trace_graph_return(struct ftrace_graph_ret *trace);
-int trace_graph_entry(struct ftrace_graph_ent *trace);
+void trace_graph_return(struct ftrace_graph_ret *trace, struct fgraph_ops *gops);
+int trace_graph_entry(struct ftrace_graph_ent *trace, struct fgraph_ops *gops);
void set_graph_array(struct trace_array *tr);
void tracing_start_cmdline_record(void);
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index c35fbaab2a47..b7b142b65299 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -129,7 +129,8 @@ static inline int ftrace_graph_ignore_irqs(void)
return in_hardirq();
}
-int trace_graph_entry(struct ftrace_graph_ent *trace)
+int trace_graph_entry(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = graph_array;
struct trace_array_cpu *data;
@@ -238,7 +239,8 @@ void __trace_graph_return(struct trace_array *tr,
trace_buffer_unlock_commit_nostack(buffer, event);
}
-void trace_graph_return(struct ftrace_graph_ret *trace)
+void trace_graph_return(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = graph_array;
struct trace_array_cpu *data;
@@ -275,7 +277,8 @@ void set_graph_array(struct trace_array *tr)
smp_mb();
}
-static void trace_graph_thresh_return(struct ftrace_graph_ret *trace)
+static void trace_graph_thresh_return(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
ftrace_graph_addr_finish(trace);
@@ -288,7 +291,7 @@ static void trace_graph_thresh_return(struct ftrace_graph_ret *trace)
(trace->rettime - trace->calltime < tracing_thresh))
return;
else
- trace_graph_return(trace);
+ trace_graph_return(trace, gops);
}
static struct fgraph_ops funcgraph_thresh_ops = {
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index ba37f768e2f2..5478f4c4f708 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -175,7 +175,8 @@ static int irqsoff_display_graph(struct trace_array *tr, int set)
return start_irqsoff_tracer(irqsoff_trace, set);
}
-static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
+static int irqsoff_graph_entry(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = irqsoff_trace;
struct trace_array_cpu *data;
@@ -205,7 +206,8 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
return ret;
}
-static void irqsoff_graph_return(struct ftrace_graph_ret *trace)
+static void irqsoff_graph_return(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = irqsoff_trace;
struct trace_array_cpu *data;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0469a04a355f..49bcc812652c 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -112,7 +112,8 @@ static int wakeup_display_graph(struct trace_array *tr, int set)
return start_func_tracer(tr, set);
}
-static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
+static int wakeup_graph_entry(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = wakeup_trace;
struct trace_array_cpu *data;
@@ -141,7 +142,8 @@ static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
return ret;
}
-static void wakeup_graph_return(struct ftrace_graph_ret *trace)
+static void wakeup_graph_return(struct ftrace_graph_ret *trace,
+ struct fgraph_ops *gops)
{
struct trace_array *tr = wakeup_trace;
struct trace_array_cpu *data;
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 529590499b1f..914331d8242c 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -762,7 +762,8 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
static unsigned int graph_hang_thresh;
/* Wrap the real function entry probe to avoid possible hanging */
-static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace)
+static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace,
+ struct fgraph_ops *gops)
{
/* This is harmlessly racy, we want to approximately detect a hang */
if (unlikely(++graph_hang_thresh > GRAPH_MAX_FUNC_TEST)) {
@@ -776,7 +777,7 @@ static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace)
return 0;
}
- return trace_graph_entry(trace);
+ return trace_graph_entry(trace, gops);
}
static struct fgraph_ops fgraph_ops __initdata = {
next prev parent reply other threads:[~2023-12-08 10:26 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-08 10:24 [PATCH v4 00/33] tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph Masami Hiramatsu (Google)
2023-12-08 10:24 ` [PATCH v4 01/33] tracing: Add a comment about ftrace_regs definition Masami Hiramatsu (Google)
2023-12-08 10:24 ` [PATCH v4 02/33] x86: tracing: Add ftrace_regs definition in the header Masami Hiramatsu (Google)
2023-12-08 10:24 ` [PATCH v4 03/33] function_graph: Convert ret_stack to a series of longs Masami Hiramatsu (Google)
2023-12-08 10:25 ` [PATCH v4 04/33] fgraph: Use BUILD_BUG_ON() to make sure we have structures divisible by long Masami Hiramatsu (Google)
2023-12-08 10:25 ` [PATCH v4 05/33] function_graph: Add an array structure that will allow multiple callbacks Masami Hiramatsu (Google)
2023-12-08 10:25 ` [PATCH v4 06/33] function_graph: Allow multiple users to attach to function graph Masami Hiramatsu (Google)
2023-12-08 10:25 ` [PATCH v4 07/33] function_graph: Remove logic around ftrace_graph_entry and return Masami Hiramatsu (Google)
2023-12-08 10:25 ` Masami Hiramatsu (Google) [this message]
2023-12-08 10:26 ` [PATCH v4 09/33] ftrace: Allow function_graph tracer to be enabled in instances Masami Hiramatsu (Google)
2023-12-08 10:26 ` [PATCH v4 10/33] ftrace: Allow ftrace startup flags exist without dynamic ftrace Masami Hiramatsu (Google)
2023-12-08 10:26 ` [PATCH v4 11/33] function_graph: Have the instances use their own ftrace_ops for filtering Masami Hiramatsu (Google)
2023-12-08 10:26 ` [PATCH v4 12/33] function_graph: Use a simple LRU for fgraph_array index number Masami Hiramatsu (Google)
2023-12-08 10:26 ` [PATCH v4 13/33] function_graph: Add "task variables" per task for fgraph_ops Masami Hiramatsu (Google)
2023-12-08 10:27 ` [PATCH v4 14/33] function_graph: Move set_graph_function tests to shadow stack global var Masami Hiramatsu (Google)
2023-12-08 10:27 ` [PATCH v4 15/33] function_graph: Move graph depth stored data " Masami Hiramatsu (Google)
2023-12-08 10:27 ` [PATCH v4 16/33] function_graph: Move graph notrace bit " Masami Hiramatsu (Google)
2023-12-08 10:27 ` [PATCH v4 17/33] function_graph: Implement fgraph_reserve_data() and fgraph_retrieve_data() Masami Hiramatsu (Google)
2023-12-08 10:27 ` [PATCH v4 18/33] function_graph: Add selftest for passing local variables Masami Hiramatsu (Google)
2023-12-08 10:28 ` [PATCH v4 19/33] function_graph: Add a new entry handler with parent_ip and ftrace_regs Masami Hiramatsu (Google)
2023-12-08 10:28 ` [PATCH v4 20/33] function_graph: Add a new exit " Masami Hiramatsu (Google)
2023-12-08 10:28 ` [PATCH v4 21/33] x86/ftrace: Enable HAVE_FUNCTION_GRAPH_FREGS Masami Hiramatsu (Google)
2023-12-08 10:28 ` [PATCH v4 22/33] tracing: Rename ftrace_regs_return_value to ftrace_regs_get_return_value Masami Hiramatsu (Google)
2023-12-08 10:28 ` [PATCH v4 23/33] arm64: ftrace: Enable HAVE_FUNCTION_GRAPH_FREGS Masami Hiramatsu (Google)
2023-12-08 10:29 ` [PATCH v4 24/33] fprobe: Use ftrace_regs in fprobe entry handler Masami Hiramatsu (Google)
2023-12-08 10:29 ` [PATCH v4 25/33] fprobe: Use ftrace_regs in fprobe exit handler Masami Hiramatsu (Google)
2023-12-08 10:29 ` [PATCH v4 26/33] tracing: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs Masami Hiramatsu (Google)
2023-12-08 10:29 ` [PATCH v4 27/33] tracing: Add ftrace_fill_perf_regs() for perf event Masami Hiramatsu (Google)
2023-12-08 10:29 ` [PATCH v4 28/33] fprobe: Rewrite fprobe on function-graph tracer Masami Hiramatsu (Google)
2023-12-08 10:30 ` [PATCH v4 29/33] tracing/fprobe: Remove nr_maxactive from fprobe Masami Hiramatsu (Google)
2023-12-08 10:30 ` [PATCH v4 30/33] tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS Masami Hiramatsu (Google)
2023-12-08 10:30 ` [PATCH v4 31/33] bpf: Enable kprobe_multi feature if CONFIG_FPROBE is enabled Masami Hiramatsu (Google)
2023-12-08 10:30 ` [PATCH v4 32/33] selftests: ftrace: Remove obsolate maxactive syntax check Masami Hiramatsu (Google)
2023-12-08 10:30 ` [PATCH v4 33/33] Documentation: probes: Update fprobe on function-graph tracer Masami Hiramatsu (Google)
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