tracing: Have graph flags passed in to ouput functions

Let the function graph tracer have custom flags passed to its
output functions.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <1270227683-14631-3-git-send-email-jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2 files changed, 73 insertions, 56 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2825ef2c0b15..970004c5fa79 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -491,7 +491,9 @@ extern int trace_clock_id;
 
 /* Standard output formatting function used for function return traces */
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-extern enum print_line_t print_graph_function(struct trace_iterator *iter);
+extern enum print_line_t
+print_graph_function_flags(struct trace_iterator *iter, u32 flags);
+extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
 extern enum print_line_t
 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
 
@@ -524,7 +526,7 @@ static inline int ftrace_graph_addr(unsigned long addr)
 #endif /* CONFIG_DYNAMIC_FTRACE */
 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
 static inline enum print_line_t
-print_graph_function(struct trace_iterator *iter)
+print_graph_function_flags(struct trace_iterator *iter, u32 flags)
 {
         return TRACE_TYPE_UNHANDLED;
 }
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index db9e06bb766e..de5f6518aba0 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -527,17 +527,18 @@ get_return_for_leaf(struct trace_iterator *iter,
 
 /* Signal a overhead of time execution to the output */
 static int
-print_graph_overhead(unsigned long long duration, struct trace_seq *s)
+print_graph_overhead(unsigned long long duration, struct trace_seq *s,
+                     u32 flags)
 {
         /* If duration disappear, we don't need anything */
-        if (!(tracer_flags.val & TRACE_GRAPH_PRINT_DURATION))
+        if (!(flags & TRACE_GRAPH_PRINT_DURATION))
                 return 1;
 
         /* Non nested entry or return */
         if (duration == -1)
                 return trace_seq_printf(s, "  ");
 
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERHEAD) {
+        if (flags & TRACE_GRAPH_PRINT_OVERHEAD) {
                 /* Duration exceeded 100 msecs */
                 if (duration > 100000ULL)
                         return trace_seq_printf(s, "! ");
@@ -563,7 +564,7 @@ static int print_graph_abs_time(u64 t, struct trace_seq *s)
 
 static enum print_line_t
 print_graph_irq(struct trace_iterator *iter, unsigned long addr,
-                enum trace_type type, int cpu, pid_t pid)
+                enum trace_type type, int cpu, pid_t pid, u32 flags)
 {
         int ret;
         struct trace_seq *s = &iter->seq;
@@ -573,21 +574,21 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
                 return TRACE_TYPE_UNHANDLED;
 
         /* Absolute time */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) {
+        if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
                 ret = print_graph_abs_time(iter->ts, s);
                 if (!ret)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
         /* Cpu */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) {
+        if (flags & TRACE_GRAPH_PRINT_CPU) {
                 ret = print_graph_cpu(s, cpu);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
         /* Proc */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) {
+        if (flags & TRACE_GRAPH_PRINT_PROC) {
                 ret = print_graph_proc(s, pid);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -597,7 +598,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
         }
 
         /* No overhead */
-        ret = print_graph_overhead(-1, s);
+        ret = print_graph_overhead(-1, s, flags);
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
@@ -610,7 +611,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* Don't close the duration column if haven't one */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
+        if (flags & TRACE_GRAPH_PRINT_DURATION)
                 trace_seq_printf(s, " |");
         ret = trace_seq_printf(s, "\n");
 
@@ -680,7 +681,8 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s)
 static enum print_line_t
 print_graph_entry_leaf(struct trace_iterator *iter,
                 struct ftrace_graph_ent_entry *entry,
-                struct ftrace_graph_ret_entry *ret_entry, struct trace_seq *s)
+                struct ftrace_graph_ret_entry *ret_entry,
+                struct trace_seq *s, u32 flags)
 {
         struct fgraph_data *data = iter->private;
         struct ftrace_graph_ret *graph_ret;
@@ -712,12 +714,12 @@ print_graph_entry_leaf(struct trace_iterator *iter,
         }
 
         /* Overhead */
-        ret = print_graph_overhead(duration, s);
+        ret = print_graph_overhead(duration, s, flags);
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* Duration */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) {
+        if (flags & TRACE_GRAPH_PRINT_DURATION) {
                 ret = print_graph_duration(duration, s);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -740,7 +742,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
 static enum print_line_t
 print_graph_entry_nested(struct trace_iterator *iter,
                          struct ftrace_graph_ent_entry *entry,
-                         struct trace_seq *s, int cpu)
+                         struct trace_seq *s, int cpu, u32 flags)
 {
         struct ftrace_graph_ent *call = &entry->graph_ent;
         struct fgraph_data *data = iter->private;
@@ -760,12 +762,12 @@ print_graph_entry_nested(struct trace_iterator *iter,
         }
 
         /* No overhead */
-        ret = print_graph_overhead(-1, s);
+        ret = print_graph_overhead(-1, s, flags);
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* No time */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) {
+        if (flags & TRACE_GRAPH_PRINT_DURATION) {
                 ret = trace_seq_printf(s, "            |  ");
                 if (!ret)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -791,7 +793,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
 
 static enum print_line_t
 print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
-                     int type, unsigned long addr)
+                     int type, unsigned long addr, u32 flags)
 {
         struct fgraph_data *data = iter->private;
         struct trace_entry *ent = iter->ent;
@@ -804,27 +806,27 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
 
         if (type) {
                 /* Interrupt */
-                ret = print_graph_irq(iter, addr, type, cpu, ent->pid);
+                ret = print_graph_irq(iter, addr, type, cpu, ent->pid, flags);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
         /* Absolute time */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) {
+        if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
                 ret = print_graph_abs_time(iter->ts, s);
                 if (!ret)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
         /* Cpu */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) {
+        if (flags & TRACE_GRAPH_PRINT_CPU) {
                 ret = print_graph_cpu(s, cpu);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
         /* Proc */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) {
+        if (flags & TRACE_GRAPH_PRINT_PROC) {
                 ret = print_graph_proc(s, ent->pid);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -846,7 +848,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
 
 static enum print_line_t
 print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
-                        struct trace_iterator *iter)
+                        struct trace_iterator *iter, u32 flags)
 {
         struct fgraph_data *data = iter->private;
         struct ftrace_graph_ent *call = &field->graph_ent;
@@ -854,14 +856,14 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
         static enum print_line_t ret;
         int cpu = iter->cpu;
 
-        if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func))
+        if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags))
                 return TRACE_TYPE_PARTIAL_LINE;
 
         leaf_ret = get_return_for_leaf(iter, field);
         if (leaf_ret)
-                ret = print_graph_entry_leaf(iter, field, leaf_ret, s);
+                ret = print_graph_entry_leaf(iter, field, leaf_ret, s, flags);
         else
-                ret = print_graph_entry_nested(iter, field, s, cpu);
+                ret = print_graph_entry_nested(iter, field, s, cpu, flags);
 
         if (data) {
                 /*
@@ -880,7 +882,8 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
 
 static enum print_line_t
 print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
-                   struct trace_entry *ent, struct trace_iterator *iter)
+                   struct trace_entry *ent, struct trace_iterator *iter,
+                   u32 flags)
 {
         unsigned long long duration = trace->rettime - trace->calltime;
         struct fgraph_data *data = iter->private;
@@ -910,16 +913,16 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
                 }
         }
 
-        if (print_graph_prologue(iter, s, 0, 0))
+        if (print_graph_prologue(iter, s, 0, 0, flags))
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* Overhead */
-        ret = print_graph_overhead(duration, s);
+        ret = print_graph_overhead(duration, s, flags);
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* Duration */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) {
+        if (flags & TRACE_GRAPH_PRINT_DURATION) {
                 ret = print_graph_duration(duration, s);
                 if (ret == TRACE_TYPE_PARTIAL_LINE)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -949,14 +952,15 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
         }
 
         /* Overrun */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERRUN) {
+        if (flags & TRACE_GRAPH_PRINT_OVERRUN) {
                 ret = trace_seq_printf(s, " (Overruns: %lu)\n",
                                         trace->overrun);
                 if (!ret)
                         return TRACE_TYPE_PARTIAL_LINE;
         }
 
-        ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET, cpu, pid);
+        ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET,
+                              cpu, pid, flags);
         if (ret == TRACE_TYPE_PARTIAL_LINE)
                 return TRACE_TYPE_PARTIAL_LINE;
 
@@ -964,8 +968,8 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
 }
 
 static enum print_line_t
-print_graph_comment(struct trace_seq *s,  struct trace_entry *ent,
-                    struct trace_iterator *iter)
+print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
+                    struct trace_iterator *iter, u32 flags)
 {
         unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
         struct fgraph_data *data = iter->private;
@@ -977,16 +981,16 @@ print_graph_comment(struct trace_seq *s,  struct trace_entry *ent,
         if (data)
                 depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth;
 
-        if (print_graph_prologue(iter, s, 0, 0))
+        if (print_graph_prologue(iter, s, 0, 0, flags))
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* No overhead */
-        ret = print_graph_overhead(-1, s);
+        ret = print_graph_overhead(-1, s, flags);
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
         /* No time */
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) {
+        if (flags & TRACE_GRAPH_PRINT_DURATION) {
                 ret = trace_seq_printf(s, "            |  ");
                 if (!ret)
                         return TRACE_TYPE_PARTIAL_LINE;
@@ -1041,7 +1045,7 @@ print_graph_comment(struct trace_seq *s,  struct trace_entry *ent,
 
 
 enum print_line_t
-print_graph_function(struct trace_iterator *iter)
+print_graph_function_flags(struct trace_iterator *iter, u32 flags)
 {
         struct ftrace_graph_ent_entry *field;
         struct fgraph_data *data = iter->private;
@@ -1062,7 +1066,7 @@ print_graph_function(struct trace_iterator *iter)
         if (data && data->failed) {
                 field = &data->ent;
                 iter->cpu = data->cpu;
-                ret = print_graph_entry(field, s, iter);
+                ret = print_graph_entry(field, s, iter, flags);
                 if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) {
                         per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1;
                         ret = TRACE_TYPE_NO_CONSUME;
@@ -1082,38 +1086,44 @@ print_graph_function(struct trace_iterator *iter)
                 struct ftrace_graph_ent_entry saved;
                 trace_assign_type(field, entry);
                 saved = *field;
-                return print_graph_entry(&saved, s, iter);
+                return print_graph_entry(&saved, s, iter, flags);
         }
         case TRACE_GRAPH_RET: {
                 struct ftrace_graph_ret_entry *field;
                 trace_assign_type(field, entry);
-                return print_graph_return(&field->ret, s, entry, iter);
+                return print_graph_return(&field->ret, s, entry, iter, flags);
         }
         default:
-                return print_graph_comment(s, entry, iter);
+                return print_graph_comment(s, entry, iter, flags);
         }
 
         return TRACE_TYPE_HANDLED;
 }
 
 static enum print_line_t
+print_graph_function(struct trace_iterator *iter)
+{
+        return print_graph_function_flags(iter, tracer_flags.val);
+}
+
+static enum print_line_t
 print_graph_function_event(struct trace_iterator *iter, int flags)
 {
         return print_graph_function(iter);
 }
 
-static void print_lat_header(struct seq_file *s)
+static void print_lat_header(struct seq_file *s, u32 flags)
 {
         static const char spaces[] = "                " /* 16 spaces */
                 "    "                                  /* 4 spaces */
                 "                 ";                    /* 17 spaces */
         int size = 0;
 
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME)
+        if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
                 size += 16;
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU)
+        if (flags & TRACE_GRAPH_PRINT_CPU)
                 size += 4;
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC)
+        if (flags & TRACE_GRAPH_PRINT_PROC)
                 size += 17;
 
         seq_printf(s, "#%.*s  _-----=> irqs-off        \n", size, spaces);
@@ -1124,42 +1134,47 @@ static void print_lat_header(struct seq_file *s)
         seq_printf(s, "#%.*s|||| /                     \n", size, spaces);
 }
 
-static void print_graph_headers(struct seq_file *s)
+void print_graph_headers_flags(struct seq_file *s, u32 flags)
 {
         int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
 
         if (lat)
-                print_lat_header(s);
+                print_lat_header(s, flags);
 
         /* 1st line */
         seq_printf(s, "#");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME)
+        if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
                 seq_printf(s, "     TIME       ");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU)
+        if (flags & TRACE_GRAPH_PRINT_CPU)
                 seq_printf(s, " CPU");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC)
+        if (flags & TRACE_GRAPH_PRINT_PROC)
                 seq_printf(s, "  TASK/PID       ");
         if (lat)
                 seq_printf(s, "|||||");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
+        if (flags & TRACE_GRAPH_PRINT_DURATION)
                 seq_printf(s, "  DURATION   ");
         seq_printf(s, "               FUNCTION CALLS\n");
 
         /* 2nd line */
         seq_printf(s, "#");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME)
+        if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
                 seq_printf(s, "      |         ");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU)
+        if (flags & TRACE_GRAPH_PRINT_CPU)
                 seq_printf(s, " |  ");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC)
+        if (flags & TRACE_GRAPH_PRINT_PROC)
                 seq_printf(s, "   |    |        ");
         if (lat)
                 seq_printf(s, "|||||");
-        if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
+        if (flags & TRACE_GRAPH_PRINT_DURATION)
                 seq_printf(s, "   |   |      ");
         seq_printf(s, "               |   |   |   |\n");
 }
 
+static void print_graph_headers(struct seq_file *s)
+{
+        print_graph_headers_flags(s, tracer_flags.val);
+}
+
 static void graph_trace_open(struct trace_iterator *iter)
 {
         /* pid and depth on the last trace processed */