linux-kernel - [PATCH] trace: instrument security and console initcall

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Date:   Thu, 22 Mar 2018 20:33:28 -0400
From:   Abderrahmane Benbachir <abderrahmane.benbachir@...ymtl.ca>
To:     rostedt@...dmis.org
Cc:     mingo@...hat.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] trace: instrument security and console initcall

Hi Steve, 
This is the patch for security & console initcall's instrumentation


Signed-off-by: Abderrahmane Benbachir <abderrahmane.benbachir@...ymtl.ca>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: linux-kernel@...r.kernel.org
---
 kernel/printk/printk.c | 7 ++++++-
 security/security.c    | 8 +++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index f274fbef821d..0f10cfd1588e 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -52,6 +52,7 @@
 #include <linux/uaccess.h>
 #include <asm/sections.h>
 
+#include <trace/events/boot.h>
 #define CREATE_TRACE_POINTS
 #include <trace/events/printk.h>
 
@@ -2781,6 +2782,7 @@ EXPORT_SYMBOL(unregister_console);
  */
 void __init console_init(void)
 {
+	int ret;
 	initcall_t *call;
 
 	/* Setup the default TTY line discipline. */
@@ -2791,8 +2793,11 @@ void __init console_init(void)
 	 * inform about problems etc..
 	 */
 	call = __con_initcall_start;
+	trace_initcall_level("console");
 	while (call < __con_initcall_end) {
-		(*call)();
+		trace_initcall_start((*call));
+		ret = (*call)();
+		trace_initcall_finish((*call), ret);
 		call++;
 	}
 }
diff --git a/security/security.c b/security/security.c
index 1cd8526cb0b7..9de51d599bb4 100644
--- a/security/security.c
+++ b/security/security.c
@@ -30,6 +30,8 @@
 #include <linux/string.h>
 #include <net/flow.h>
 
+#include <trace/events/boot.h>
+
 #define MAX_LSM_EVM_XATTR	2
 
 /* Maximum number of letters for an LSM name string */
@@ -45,10 +47,14 @@ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
 
 static void __init do_security_initcalls(void)
 {
+	int ret;
 	initcall_t *call;
 	call = __security_initcall_start;
+	trace_initcall_level("security");
 	while (call < __security_initcall_end) {
-		(*call) ();
+		trace_initcall_start((*call));
+		ret = (*call) ();
+		trace_initcall_finish((*call), ret);
 		call++;
 	}
 }
-- 
2.11.0