#include <linux/trace_seq.h>
#include <linux/ftrace_event.h>
+#ifdef CONFIG_FTRACE_SYSCALLS
+#include <asm/unistd.h> /* For NR_SYSCALLS */
+#include <asm/syscall.h> /* some archs define it here */
+#endif
+
enum trace_type {
__TRACE_FIRST_TYPE = 0,
#define TRACE_BUF_SIZE 1024
+struct trace_array;
+
+struct trace_cpu {
+ struct trace_array *tr;
+ struct dentry *dir;
+ int cpu;
+};
+
/*
* The CPU trace array - it consists of thousands of trace entries
* plus some other descriptor data: (for example which task started
* the trace, etc.)
*/
struct trace_array_cpu {
+ struct trace_cpu trace_cpu;
atomic_t disabled;
void *buffer_page; /* ring buffer spare */
char comm[TASK_COMM_LEN];
};
+struct tracer;
+
+struct trace_buffer {
+ struct trace_array *tr;
+ struct ring_buffer *buffer;
+ struct trace_array_cpu __percpu *data;
+ cycle_t time_start;
+ int cpu;
+};
+
/*
* The trace array - an array of per-CPU trace arrays. This is the
* highest level data structure that individual tracers deal with.
* They have on/off state as well:
*/
struct trace_array {
- struct ring_buffer *buffer;
- int cpu;
+ struct list_head list;
+ char *name;
+ struct trace_buffer trace_buffer;
+#ifdef CONFIG_TRACER_MAX_TRACE
+ /*
+ * The max_buffer is used to snapshot the trace when a maximum
+ * latency is reached, or when the user initiates a snapshot.
+ * Some tracers will use this to store a maximum trace while
+ * it continues examining live traces.
+ *
+ * The buffers for the max_buffer are set up the same as the trace_buffer
+ * When a snapshot is taken, the buffer of the max_buffer is swapped
+ * with the buffer of the trace_buffer and the buffers are reset for
+ * the trace_buffer so the tracing can continue.
+ */
+ struct trace_buffer max_buffer;
+ bool allocated_snapshot;
+#endif
int buffer_disabled;
- cycle_t time_start;
+ struct trace_cpu trace_cpu; /* place holder */
+#ifdef CONFIG_FTRACE_SYSCALLS
+ int sys_refcount_enter;
+ int sys_refcount_exit;
+ DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
+ DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
+#endif
+ int stop_count;
+ int clock_id;
+ struct tracer *current_trace;
+ unsigned int flags;
+ raw_spinlock_t start_lock;
+ struct dentry *dir;
+ struct dentry *options;
+ struct dentry *percpu_dir;
+ struct dentry *event_dir;
+ struct list_head systems;
+ struct list_head events;
struct task_struct *waiter;
- struct trace_array_cpu *data[NR_CPUS];
};
+enum {
+ TRACE_ARRAY_FL_GLOBAL = (1 << 0)
+};
+
+extern struct list_head ftrace_trace_arrays;
+
+/*
+ * The global tracer (top) should be the first trace array added,
+ * but we check the flag anyway.
+ */
+static inline struct trace_array *top_trace_array(void)
+{
+ struct trace_array *tr;
+
+ tr = list_entry(ftrace_trace_arrays.prev,
+ typeof(*tr), list);
+ WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL));
+ return tr;
+}
+
#define FTRACE_CMP_TYPE(var, type) \
__builtin_types_compatible_p(typeof(var), type *)
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);
+ /* Return 0 if OK with change, else return non-zero */
+ int (*flag_changed)(struct tracer *tracer,
+ u32 mask, int set);
struct tracer *next;
struct tracer_flags *flags;
bool print_max;
+ bool enabled;
+#ifdef CONFIG_TRACER_MAX_TRACE
bool use_max_tr;
- bool allocated_snapshot;
+#endif
};
current->trace_recursion = val;
}
-#define TRACE_PIPE_ALL_CPU -1
-
static inline struct ring_buffer_iter *
trace_buffer_iter(struct trace_iterator *iter, int cpu)
{
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
-void tracing_reset(struct trace_array *tr, int cpu);
-void tracing_reset_online_cpus(struct trace_array *tr);
+void tracing_reset(struct trace_buffer *buf, int cpu);
+void tracing_reset_online_cpus(struct trace_buffer *buf);
void tracing_reset_current(int cpu);
-void tracing_reset_current_online_cpus(void);
+void tracing_reset_all_online_cpus(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
struct dentry *trace_create_file(const char *name,
umode_t mode,
void *data,
const struct file_operations *fops);
+struct dentry *tracing_init_dentry_tr(struct trace_array *tr);
struct dentry *tracing_init_dentry(void);
struct ring_buffer_event;
unsigned long ip, const char *fmt, va_list args);
int trace_array_printk(struct trace_array *tr,
unsigned long ip, const char *fmt, ...);
+int trace_array_printk_buf(struct ring_buffer *buffer,
+ unsigned long ip, const char *fmt, ...);
void trace_printk_seq(struct trace_seq *s);
enum print_line_t print_trace_line(struct trace_iterator *iter);
struct ftrace_event_field {
struct list_head link;
- char *name;
- char *type;
+ const char *name;
+ const char *type;
int filter_type;
int offset;
int size;
struct event_subsystem {
struct list_head list;
const char *name;
- struct dentry *entry;
struct event_filter *filter;
- int nr_events;
int ref_count;
};
+struct ftrace_subsystem_dir {
+ struct list_head list;
+ struct event_subsystem *subsystem;
+ struct trace_array *tr;
+ struct dentry *entry;
+ int ref_count;
+ int nr_events;
+};
+
#define FILTER_PRED_INVALID ((unsigned short)-1)
#define FILTER_PRED_IS_RIGHT (1 << 15)
#define FILTER_PRED_FOLD (1 << 15)
struct trace_seq *s);
extern int apply_event_filter(struct ftrace_event_call *call,
char *filter_string);
-extern int apply_subsystem_event_filter(struct event_subsystem *system,
+extern int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir,
char *filter_string);
extern void print_subsystem_event_filter(struct event_subsystem *system,
struct trace_seq *s);
}
extern void trace_event_enable_cmd_record(bool enable);
+extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr);
+extern int event_trace_del_tracer(struct trace_array *tr);
extern struct mutex event_mutex;
extern struct list_head ftrace_events;
void trace_printk_init_buffers(void);
void trace_printk_start_comm(void);
+int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
+int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled);
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
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