tracing: Pass trace_array to set_flag callback

As options (flags) may affect instances instead of being global
the set_flag() callbacks need to receive the trace_array descriptor
of the instance they will be modifying.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

8 files changed, 27 insertions, 17 deletions

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index b418cb0d7242..0d758ca61933 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1427,7 +1427,8 @@ static enum print_line_t blk_tracer_print_line(struct trace_iterator *iter)
         return print_one_line(iter, true);
 }
 
-static int blk_tracer_set_flag(u32 old_flags, u32 bit, int set)
+static int
+blk_tracer_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         /* don't output context-info for blk_classic output */
         if (bit == TRACE_BLK_OPT_CLASSIC) {
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 815c878f409b..d7dfc7efc4bf 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -73,7 +73,8 @@ static struct tracer_flags dummy_tracer_flags = {
         .opts = dummy_tracer_opt
 };
 
-static int dummy_set_flag(u32 old_flags, u32 bit, int set)
+static int
+dummy_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         return 0;
 }
@@ -3339,13 +3340,14 @@ static int tracing_trace_options_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static int __set_tracer_option(struct tracer *trace,
+static int __set_tracer_option(struct trace_array *tr,
                                struct tracer_flags *tracer_flags,
                                struct tracer_opt *opts, int neg)
 {
+        struct tracer *trace = tr->current_trace;
         int ret;
 
-        ret = trace->set_flag(tracer_flags->val, opts->bit, !neg);
+        ret = trace->set_flag(tr, tracer_flags->val, opts->bit, !neg);
         if (ret)
                 return ret;
 
@@ -3357,8 +3359,9 @@ static int __set_tracer_option(struct tracer *trace,
 }
 
 /* Try to assign a tracer specific option */
-static int set_tracer_option(struct tracer *trace, char *cmp, int neg)
+static int set_tracer_option(struct trace_array *tr, char *cmp, int neg)
 {
+        struct tracer *trace = tr->current_trace;
         struct tracer_flags *tracer_flags = trace->flags;
         struct tracer_opt *opts = NULL;
         int i;
@@ -3367,8 +3370,7 @@ static int set_tracer_option(struct tracer *trace, char *cmp, int neg)
                 opts = &tracer_flags->opts[i];
 
                 if (strcmp(cmp, opts->name) == 0)
-                        return __set_tracer_option(trace, trace->flags,
-                                                   opts, neg);
+                        return __set_tracer_option(tr, trace->flags, opts, neg);
         }
 
         return -EINVAL;
@@ -3440,7 +3442,7 @@ static int trace_set_options(struct trace_array *tr, char *option)
 
         /* If no option could be set, test the specific tracer options */
         if (!trace_options[i])
-                ret = set_tracer_option(tr->current_trace, cmp, neg);
+                ret = set_tracer_option(tr, cmp, neg);
 
         mutex_unlock(&trace_types_lock);
 
@@ -5689,7 +5691,7 @@ trace_options_write(struct file *filp, const char __user *ubuf, size_t cnt,
 
         if (!!(topt->flags->val & topt->opt->bit) != val) {
                 mutex_lock(&trace_types_lock);
-                ret = __set_tracer_option(topt->tr->current_trace, topt->flags,
+                ret = __set_tracer_option(topt->tr, topt->flags,
                                           topt->opt, !val);
                 mutex_unlock(&trace_types_lock);
                 if (ret)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 02b592f2d4b7..649a23d421c1 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -355,7 +355,8 @@ struct tracer {
         void                    (*print_header)(struct seq_file *m);
         enum print_line_t       (*print_line)(struct trace_iterator *iter);
         /* If you handled the flag setting, return 0 */
-        int                     (*set_flag)(u32 old_flags, u32 bit, int set);
+        int                     (*set_flag)(struct trace_array *tr,
+                                            u32 old_flags, u32 bit, int set);
         /* Return 0 if OK with change, else return non-zero */
         int                     (*flag_changed)(struct tracer *tracer,
                                                 u32 mask, int set);
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 38fe1483c508..85e517e84f50 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -175,7 +175,8 @@ static void tracing_stop_function_trace(void)
                 unregister_ftrace_function(&trace_ops);
 }
 
-static int func_set_flag(u32 old_flags, u32 bit, int set)
+static int
+func_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         switch (bit) {
         case TRACE_FUNC_OPT_STACK:
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 0b99120d395c..deff11200261 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -1476,7 +1476,8 @@ void graph_trace_close(struct trace_iterator *iter)
         }
 }
 
-static int func_graph_set_flag(u32 old_flags, u32 bit, int set)
+static int
+func_graph_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         if (bit == TRACE_GRAPH_PRINT_IRQS)
                 ftrace_graph_skip_irqs = !set;
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 2aefbee93a6d..fd99b0c183ac 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -160,7 +160,8 @@ static struct ftrace_ops trace_ops __read_mostly =
 #endif /* CONFIG_FUNCTION_TRACER */
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
+static int
+irqsoff_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         int cpu;
 
@@ -266,7 +267,8 @@ __trace_function(struct trace_array *tr,
 #else
 #define __trace_function trace_function
 
-static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
+static int
+irqsoff_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         return -EINVAL;
 }
diff --git a/kernel/trace/trace_nop.c b/kernel/trace/trace_nop.c
index 394f94417e2f..f3984098c0d7 100644
--- a/kernel/trace/trace_nop.c
+++ b/kernel/trace/trace_nop.c
@@ -62,7 +62,7 @@ static void nop_trace_reset(struct trace_array *tr)
  * If you don't implement it, then the flag setting will be
  * automatically accepted.
  */
-static int nop_set_flag(u32 old_flags, u32 bit, int set)
+static int nop_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         /*
          * Note that you don't need to update nop_flags.val yourself.
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 6e32635e5e57..f0bbdc261028 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -209,7 +209,8 @@ static void stop_func_tracer(int graph)
 }
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-static int wakeup_set_flag(u32 old_flags, u32 bit, int set)
+static int
+wakeup_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
 
         if (!(bit & TRACE_DISPLAY_GRAPH))
@@ -311,7 +312,8 @@ __trace_function(struct trace_array *tr,
 #else
 #define __trace_function trace_function
 
-static int wakeup_set_flag(u32 old_flags, u32 bit, int set)
+static int
+wakeup_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 {
         return -EINVAL;
 }