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Diffstat (limited to 'kernel/trace/trace.h')
-rw-r--r--kernel/trace/trace.h110
1 files changed, 69 insertions, 41 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index fd24b1f9ac43..ae1cce91fead 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -15,6 +15,7 @@
#include <linux/trace_events.h>
#include <linux/compiler.h>
#include <linux/trace_seq.h>
+#include <linux/glob.h>
#ifdef CONFIG_FTRACE_SYSCALLS
#include <asm/unistd.h> /* For NR_SYSCALLS */
@@ -39,6 +40,7 @@ enum trace_type {
TRACE_BLK,
TRACE_BPUTS,
TRACE_HWLAT,
+ TRACE_RAW_DATA,
__TRACE_LAST_TYPE,
};
@@ -157,7 +159,7 @@ struct trace_array_cpu {
unsigned long policy;
unsigned long rt_priority;
unsigned long skipped_entries;
- cycle_t preempt_timestamp;
+ u64 preempt_timestamp;
pid_t pid;
kuid_t uid;
char comm[TASK_COMM_LEN];
@@ -175,7 +177,7 @@ struct trace_buffer {
struct trace_array *tr;
struct ring_buffer *buffer;
struct trace_array_cpu __percpu *data;
- cycle_t time_start;
+ u64 time_start;
int cpu;
};
@@ -330,6 +332,7 @@ extern void __ftrace_bad_type(void);
IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
IF_ASSIGN(var, ent, struct bputs_entry, TRACE_BPUTS); \
IF_ASSIGN(var, ent, struct hwlat_entry, TRACE_HWLAT); \
+ IF_ASSIGN(var, ent, struct raw_data_entry, TRACE_RAW_DATA);\
IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
TRACE_MMIO_RW); \
IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
@@ -599,8 +602,8 @@ struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
int *ent_cpu, u64 *ent_ts);
-void __buffer_unlock_commit(struct ring_buffer *buffer,
- struct ring_buffer_event *event);
+void trace_buffer_unlock_commit_nostack(struct ring_buffer *buffer,
+ struct ring_buffer_event *event);
int trace_empty(struct trace_iterator *iter);
@@ -686,7 +689,7 @@ static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
}
#endif /* CONFIG_STACKTRACE */
-extern cycle_t ftrace_now(int cpu);
+extern u64 ftrace_now(int cpu);
extern void trace_find_cmdline(int pid, char comm[]);
extern void trace_event_follow_fork(struct trace_array *tr, bool enable);
@@ -733,7 +736,7 @@ extern int trace_selftest_startup_branch(struct tracer *trace,
#endif /* CONFIG_FTRACE_STARTUP_TEST */
extern void *head_page(struct trace_array_cpu *data);
-extern unsigned long long ns2usecs(cycle_t nsec);
+extern unsigned long long ns2usecs(u64 nsec);
extern int
trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
extern int
@@ -750,6 +753,21 @@ enum print_line_t print_trace_line(struct trace_iterator *iter);
extern char trace_find_mark(unsigned long long duration);
+struct ftrace_hash {
+ unsigned long size_bits;
+ struct hlist_head *buckets;
+ unsigned long count;
+ struct rcu_head rcu;
+};
+
+struct ftrace_func_entry *
+ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
+
+static __always_inline bool ftrace_hash_empty(struct ftrace_hash *hash)
+{
+ return !hash || !hash->count;
+}
+
/* Standard output formatting function used for function return traces */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
@@ -784,53 +802,50 @@ extern void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned long flags, int pc);
-
#ifdef CONFIG_DYNAMIC_FTRACE
-/* TODO: make this variable */
-#define FTRACE_GRAPH_MAX_FUNCS 32
-extern int ftrace_graph_count;
-extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
-extern int ftrace_graph_notrace_count;
-extern unsigned long ftrace_graph_notrace_funcs[FTRACE_GRAPH_MAX_FUNCS];
+extern struct ftrace_hash *ftrace_graph_hash;
+extern struct ftrace_hash *ftrace_graph_notrace_hash;
static inline int ftrace_graph_addr(unsigned long addr)
{
- int i;
-
- if (!ftrace_graph_count)
- return 1;
-
- for (i = 0; i < ftrace_graph_count; i++) {
- if (addr == ftrace_graph_funcs[i]) {
- /*
- * If no irqs are to be traced, but a set_graph_function
- * is set, and called by an interrupt handler, we still
- * want to trace it.
- */
- if (in_irq())
- trace_recursion_set(TRACE_IRQ_BIT);
- else
- trace_recursion_clear(TRACE_IRQ_BIT);
- return 1;
- }
+ int ret = 0;
+
+ preempt_disable_notrace();
+
+ if (ftrace_hash_empty(ftrace_graph_hash)) {
+ ret = 1;
+ goto out;
}
- return 0;
+ if (ftrace_lookup_ip(ftrace_graph_hash, addr)) {
+ /*
+ * If no irqs are to be traced, but a set_graph_function
+ * is set, and called by an interrupt handler, we still
+ * want to trace it.
+ */
+ if (in_irq())
+ trace_recursion_set(TRACE_IRQ_BIT);
+ else
+ trace_recursion_clear(TRACE_IRQ_BIT);
+ ret = 1;
+ }
+
+out:
+ preempt_enable_notrace();
+ return ret;
}
static inline int ftrace_graph_notrace_addr(unsigned long addr)
{
- int i;
+ int ret = 0;
- if (!ftrace_graph_notrace_count)
- return 0;
+ preempt_disable_notrace();
- for (i = 0; i < ftrace_graph_notrace_count; i++) {
- if (addr == ftrace_graph_notrace_funcs[i])
- return 1;
- }
+ if (ftrace_lookup_ip(ftrace_graph_notrace_hash, addr))
+ ret = 1;
- return 0;
+ preempt_enable_notrace();
+ return ret;
}
#else
static inline int ftrace_graph_addr(unsigned long addr)
@@ -843,6 +858,17 @@ static inline int ftrace_graph_notrace_addr(unsigned long addr)
return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
+
+extern unsigned int fgraph_max_depth;
+
+static inline bool ftrace_graph_ignore_func(struct ftrace_graph_ent *trace)
+{
+ /* trace it when it is-nested-in or is a function enabled. */
+ return !(trace->depth || ftrace_graph_addr(trace->func)) ||
+ (trace->depth < 0) ||
+ (fgraph_max_depth && trace->depth >= fgraph_max_depth);
+}
+
#else /* CONFIG_FUNCTION_GRAPH_TRACER */
static inline enum print_line_t
print_graph_function_flags(struct trace_iterator *iter, u32 flags)
@@ -1257,6 +1283,7 @@ enum regex_type {
MATCH_FRONT_ONLY,
MATCH_MIDDLE_ONLY,
MATCH_END_ONLY,
+ MATCH_GLOB,
};
struct regex {
@@ -1285,7 +1312,8 @@ static inline bool is_string_field(struct ftrace_event_field *field)
{
return field->filter_type == FILTER_DYN_STRING ||
field->filter_type == FILTER_STATIC_STRING ||
- field->filter_type == FILTER_PTR_STRING;
+ field->filter_type == FILTER_PTR_STRING ||
+ field->filter_type == FILTER_COMM;
}
static inline bool is_function_field(struct ftrace_event_field *field)
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