#include <linux/perf_event.h>
struct trace_array;
+struct trace_buffer;
struct tracer;
struct dentry;
const char *ftrace_print_hex_seq(struct trace_seq *p,
const unsigned char *buf, int len);
+struct trace_iterator;
+struct trace_event;
+
+int ftrace_raw_output_prep(struct trace_iterator *iter,
+ struct trace_event *event);
+
/*
* The trace entry - the most basic unit of tracing. This is what
* is printed in the end as a single line in the trace output, such as:
unsigned char flags;
unsigned char preempt_count;
int pid;
- int padding;
};
#define FTRACE_MAX_EVENT \
struct trace_iterator {
struct trace_array *tr;
struct tracer *trace;
+ struct trace_buffer *trace_buffer;
void *private;
int cpu_file;
struct mutex mutex;
long idx;
cpumask_var_t started;
+
+ /* it's true when current open file is snapshot */
+ bool snapshot;
};
enum trace_iter_flags {
};
-struct trace_event;
-
typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
int flags, struct trace_event *event);
void tracing_generic_entry_update(struct trace_entry *entry,
unsigned long flags,
int pc);
+struct ftrace_event_file;
+
+struct ring_buffer_event *
+trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
+ struct ftrace_event_file *ftrace_file,
+ int type, unsigned long len,
+ unsigned long flags, int pc);
struct ring_buffer_event *
trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
int type, unsigned long len,
enum trace_reg type, void *data);
enum {
- TRACE_EVENT_FL_ENABLED_BIT,
TRACE_EVENT_FL_FILTERED_BIT,
- TRACE_EVENT_FL_RECORDED_CMD_BIT,
TRACE_EVENT_FL_CAP_ANY_BIT,
TRACE_EVENT_FL_NO_SET_FILTER_BIT,
TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
+ TRACE_EVENT_FL_WAS_ENABLED_BIT,
};
+/*
+ * Event flags:
+ * FILTERED - The event has a filter attached
+ * CAP_ANY - Any user can enable for perf
+ * NO_SET_FILTER - Set when filter has error and is to be ignored
+ * IGNORE_ENABLE - For ftrace internal events, do not enable with debugfs file
+ * WAS_ENABLED - Set and stays set when an event was ever enabled
+ * (used for module unloading, if a module event is enabled,
+ * it is best to clear the buffers that used it).
+ */
enum {
- TRACE_EVENT_FL_ENABLED = (1 << TRACE_EVENT_FL_ENABLED_BIT),
TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
- TRACE_EVENT_FL_RECORDED_CMD = (1 << TRACE_EVENT_FL_RECORDED_CMD_BIT),
TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
+ TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT),
};
struct ftrace_event_call {
struct list_head list;
struct ftrace_event_class *class;
char *name;
- struct dentry *dir;
struct trace_event event;
const char *print_fmt;
struct event_filter *filter;
+ struct list_head *files;
void *mod;
void *data;
-
/*
- * 32 bit flags:
- * bit 1: enabled
- * bit 2: filter_active
- * bit 3: enabled cmd record
- * bit 4: allow trace by non root (cap any)
- * bit 5: failed to apply filter
- * bit 6: ftrace internal event (do not enable)
- *
- * Changes to flags must hold the event_mutex.
- *
- * Note: Reads of flags do not hold the event_mutex since
- * they occur in critical sections. But the way flags
- * is currently used, these changes do no affect the code
- * except that when a change is made, it may have a slight
- * delay in propagating the changes to other CPUs due to
- * caching and such.
+ * bit 0: filter_active
+ * bit 1: allow trace by non root (cap any)
+ * bit 2: failed to apply filter
+ * bit 3: ftrace internal event (do not enable)
+ * bit 4: Event was enabled by module
*/
- unsigned int flags;
+ int flags; /* static flags of different events */
#ifdef CONFIG_PERF_EVENTS
int perf_refcount;
#endif
};
+struct trace_array;
+struct ftrace_subsystem_dir;
+
+enum {
+ FTRACE_EVENT_FL_ENABLED_BIT,
+ FTRACE_EVENT_FL_RECORDED_CMD_BIT,
+ FTRACE_EVENT_FL_SOFT_MODE_BIT,
+ FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
+};
+
+/*
+ * Ftrace event file flags:
+ * ENABLED - The event is enabled
+ * RECORDED_CMD - The comms should be recorded at sched_switch
+ * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED
+ * SOFT_DISABLED - When set, do not trace the event (even though its
+ * tracepoint may be enabled)
+ */
+enum {
+ FTRACE_EVENT_FL_ENABLED = (1 << FTRACE_EVENT_FL_ENABLED_BIT),
+ FTRACE_EVENT_FL_RECORDED_CMD = (1 << FTRACE_EVENT_FL_RECORDED_CMD_BIT),
+ FTRACE_EVENT_FL_SOFT_MODE = (1 << FTRACE_EVENT_FL_SOFT_MODE_BIT),
+ FTRACE_EVENT_FL_SOFT_DISABLED = (1 << FTRACE_EVENT_FL_SOFT_DISABLED_BIT),
+};
+
+struct ftrace_event_file {
+ struct list_head list;
+ struct ftrace_event_call *event_call;
+ struct dentry *dir;
+ struct trace_array *tr;
+ struct ftrace_subsystem_dir *system;
+
+ /*
+ * 32 bit flags:
+ * bit 0: enabled
+ * bit 1: enabled cmd record
+ * bit 2: enable/disable with the soft disable bit
+ * bit 3: soft disabled
+ *
+ * Note: The bits must be set atomically to prevent races
+ * from other writers. Reads of flags do not need to be in
+ * sync as they occur in critical sections. But the way flags
+ * is currently used, these changes do not affect the code
+ * except that when a change is made, it may have a slight
+ * delay in propagating the changes to other CPUs due to
+ * caching and such. Which is mostly OK ;-)
+ */
+ unsigned long flags;
+};
+
#define __TRACE_EVENT_FLAGS(name, value) \
static int __init trace_init_flags_##name(void) \
{ \
extern int trace_add_event_call(struct ftrace_event_call *call);
extern void trace_remove_event_call(struct ftrace_event_call *call);
-#define is_signed_type(type) (((type)(-1)) < 0)
+#define is_signed_type(type) (((type)(-1)) < (type)1)
int trace_set_clr_event(const char *system, const char *event, int set);
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