Merge branch 'next' into for-linus

1 files changed, 105 insertions, 149 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index e685ac2b2ba1..8b9f4f6e9559 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -9,9 +9,12 @@
 #include <linux/mmiotrace.h>
 #include <linux/ftrace.h>
 #include <trace/boot.h>
-#include <trace/kmemtrace.h>
+#include <linux/kmemtrace.h>
 #include <trace/power.h>
 
+#include <linux/trace_seq.h>
+#include <linux/ftrace_event.h>
+
 enum trace_type {
         __TRACE_FIRST_TYPE = 0,
 
@@ -42,20 +45,6 @@ enum trace_type {
 };
 
 /*
- * 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:
- *
- *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
- */
-struct trace_entry {
-        unsigned char           type;
-        unsigned char           flags;
-        unsigned char           preempt_count;
-        int                     pid;
-        int                     tgid;
-};
-
-/*
  * Function trace entry - function address and parent function addres:
  */
 struct ftrace_entry {
@@ -263,8 +252,6 @@ struct trace_array_cpu {
         char                    comm[TASK_COMM_LEN];
 };
 
-struct trace_iterator;
-
 /*
  * The trace array - an array of per-CPU trace arrays. This is the
  * highest level data structure that individual tracers deal with.
@@ -339,15 +326,6 @@ extern void __ftrace_bad_type(void);
                 __ftrace_bad_type();                                    \
         } while (0)
 
-/* Return values for print_line callback */
-enum print_line_t {
-        TRACE_TYPE_PARTIAL_LINE = 0,    /* Retry after flushing the seq */
-        TRACE_TYPE_HANDLED      = 1,
-        TRACE_TYPE_UNHANDLED    = 2,    /* Relay to other output functions */
-        TRACE_TYPE_NO_CONSUME   = 3     /* Handled but ask to not consume */
-};
-
-
 /*
  * An option specific to a tracer. This is a boolean value.
  * The bit is the bit index that sets its value on the
@@ -423,60 +401,30 @@ struct tracer {
         struct tracer_stat      *stats;
 };
 
-struct trace_seq {
-        unsigned char           buffer[PAGE_SIZE];
-        unsigned int            len;
-        unsigned int            readpos;
-};
-
-static inline void
-trace_seq_init(struct trace_seq *s)
-{
-        s->len = 0;
-        s->readpos = 0;
-}
-
 
 #define TRACE_PIPE_ALL_CPU      -1
 
-/*
- * Trace iterator - used by printout routines who present trace
- * results to users and which routines might sleep, etc:
- */
-struct trace_iterator {
-        struct trace_array      *tr;
-        struct tracer           *trace;
-        void                    *private;
-        int                     cpu_file;
-        struct mutex            mutex;
-        struct ring_buffer_iter *buffer_iter[NR_CPUS];
-
-        /* The below is zeroed out in pipe_read */
-        struct trace_seq        seq;
-        struct trace_entry      *ent;
-        int                     cpu;
-        u64                     ts;
-
-        unsigned long           iter_flags;
-        loff_t                  pos;
-        long                    idx;
-
-        cpumask_var_t           started;
-};
-
 int tracer_init(struct tracer *t, struct trace_array *tr);
 int tracing_is_enabled(void);
 void trace_wake_up(void);
 void tracing_reset(struct trace_array *tr, int cpu);
 void tracing_reset_online_cpus(struct trace_array *tr);
+void tracing_reset_current(int cpu);
+void tracing_reset_current_online_cpus(void);
 int tracing_open_generic(struct inode *inode, struct file *filp);
+struct dentry *trace_create_file(const char *name,
+                                 mode_t mode,
+                                 struct dentry *parent,
+                                 void *data,
+                                 const struct file_operations *fops);
+
 struct dentry *tracing_init_dentry(void);
 void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
 
 struct ring_buffer_event;
 
 struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
-                                                    unsigned char type,
+                                                    int type,
                                                     unsigned long len,
                                                     unsigned long flags,
                                                     int pc);
@@ -484,24 +432,12 @@ void trace_buffer_unlock_commit(struct trace_array *tr,
                                 struct ring_buffer_event *event,
                                 unsigned long flags, int pc);
 
-struct ring_buffer_event *
-trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
-                                  unsigned long flags, int pc);
-void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
-                                        unsigned long flags, int pc);
-void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
-                                        unsigned long flags, int pc);
-
 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
                                                 struct trace_array_cpu *data);
 
 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
                                           int *ent_cpu, u64 *ent_ts);
 
-void tracing_generic_entry_update(struct trace_entry *entry,
-                                  unsigned long flags,
-                                  int pc);
-
 void default_wait_pipe(struct trace_iterator *iter);
 void poll_wait_pipe(struct trace_iterator *iter);
 
@@ -514,7 +450,6 @@ void tracing_sched_switch_trace(struct trace_array *tr,
                                 struct task_struct *prev,
                                 struct task_struct *next,
                                 unsigned long flags, int pc);
-void tracing_record_cmdline(struct task_struct *tsk);
 
 void tracing_sched_wakeup_trace(struct trace_array *tr,
                                 struct task_struct *wakee,
@@ -599,6 +534,8 @@ extern int trace_selftest_startup_sysprof(struct tracer *trace,
                                                struct trace_array *tr);
 extern int trace_selftest_startup_branch(struct tracer *trace,
                                          struct trace_array *tr);
+extern int trace_selftest_startup_hw_branches(struct tracer *trace,
+                                              struct trace_array *tr);
 #endif /* CONFIG_FTRACE_STARTUP_TEST */
 
 extern void *head_page(struct trace_array_cpu *data);
@@ -613,6 +550,8 @@ extern unsigned long trace_flags;
 /* 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
+trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 /* TODO: make this variable */
@@ -644,7 +583,6 @@ static inline int ftrace_graph_addr(unsigned long addr)
         return 1;
 }
 #endif /* CONFIG_DYNAMIC_FTRACE */
-
 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
 static inline enum print_line_t
 print_graph_function(struct trace_iterator *iter)
@@ -655,6 +593,7 @@ print_graph_function(struct trace_iterator *iter)
 
 extern struct pid *ftrace_pid_trace;
 
+#ifdef CONFIG_FUNCTION_TRACER
 static inline int ftrace_trace_task(struct task_struct *task)
 {
         if (!ftrace_pid_trace)
@@ -662,6 +601,12 @@ static inline int ftrace_trace_task(struct task_struct *task)
 
         return test_tsk_trace_trace(task);
 }
+#else
+static inline int ftrace_trace_task(struct task_struct *task)
+{
+        return 1;
+}
+#endif
 
 /*
  * trace_iterator_flags is an enumeration that defines bit
@@ -692,6 +637,7 @@ enum trace_iterator_flags {
         TRACE_ITER_LATENCY_FMT          = 0x40000,
         TRACE_ITER_GLOBAL_CLK           = 0x80000,
         TRACE_ITER_SLEEP_TIME           = 0x100000,
+        TRACE_ITER_GRAPH_TIME           = 0x200000,
 };
 
 /*
@@ -790,103 +736,113 @@ struct ftrace_event_field {
         char                    *type;
         int                     offset;
         int                     size;
+        int                     is_signed;
 };
 
-struct ftrace_event_call {
-        char                    *name;
-        char                    *system;
-        struct dentry           *dir;
-        int                     enabled;
-        int                     (*regfunc)(void);
-        void                    (*unregfunc)(void);
-        int                     id;
-        int                     (*raw_init)(void);
-        int                     (*show_format)(struct trace_seq *s);
-        int                     (*define_fields)(void);
-        struct list_head        fields;
+struct event_filter {
+        int                     n_preds;
         struct filter_pred      **preds;
-
-#ifdef CONFIG_EVENT_PROFILE
-        atomic_t        profile_count;
-        int             (*profile_enable)(struct ftrace_event_call *);
-        void            (*profile_disable)(struct ftrace_event_call *);
-#endif
+        char                    *filter_string;
 };
 
 struct event_subsystem {
         struct list_head        list;
         const char              *name;
         struct dentry           *entry;
-        struct filter_pred      **preds;
+        void                    *filter;
 };
 
-#define events_for_each(event)                                          \
-        for (event = __start_ftrace_events;                             \
-             (unsigned long)event < (unsigned long)__stop_ftrace_events; \
-             event++)
-
-#define MAX_FILTER_PRED 8
-
 struct filter_pred;
 
-typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
+typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
+                                 int val1, int val2);
 
 struct filter_pred {
         filter_pred_fn_t fn;
         u64 val;
-        char *str_val;
+        char str_val[MAX_FILTER_STR_VAL];
         int str_len;
         char *field_name;
         int offset;
         int not;
-        int or;
-        int compound;
-        int clear;
+        int op;
+        int pop_n;
 };
 
-int trace_define_field(struct ftrace_event_call *call, char *type,
-                       char *name, int offset, int size);
-extern void filter_free_pred(struct filter_pred *pred);
-extern void filter_print_preds(struct filter_pred **preds,
+extern void print_event_filter(struct ftrace_event_call *call,
                                struct trace_seq *s);
-extern int filter_parse(char **pbuf, struct filter_pred *pred);
-extern int filter_add_pred(struct ftrace_event_call *call,
-                           struct filter_pred *pred);
-extern void filter_free_preds(struct ftrace_event_call *call);
-extern int filter_match_preds(struct ftrace_event_call *call, void *rec);
-extern void filter_free_subsystem_preds(struct event_subsystem *system);
-extern int filter_add_subsystem_pred(struct event_subsystem *system,
-                                     struct filter_pred *pred);
-
-void event_trace_printk(unsigned long ip, const char *fmt, ...);
-extern struct ftrace_event_call __start_ftrace_events[];
-extern struct ftrace_event_call __stop_ftrace_events[];
-
-#define for_each_event(event)                                           \
-        for (event = __start_ftrace_events;                             \
-             (unsigned long)event < (unsigned long)__stop_ftrace_events; \
-             event++)
+extern int apply_event_filter(struct ftrace_event_call *call,
+                              char *filter_string);
+extern int apply_subsystem_event_filter(struct event_subsystem *system,
+                                        char *filter_string);
+extern void print_subsystem_event_filter(struct event_subsystem *system,
+                                         struct trace_seq *s);
+
+static inline int
+filter_check_discard(struct ftrace_event_call *call, void *rec,
+                     struct ring_buffer *buffer,
+                     struct ring_buffer_event *event)
+{
+        if (unlikely(call->filter_active) && !filter_match_preds(call, rec)) {
+                ring_buffer_discard_commit(buffer, event);
+                return 1;
+        }
+
+        return 0;
+}
+
+#define DEFINE_COMPARISON_PRED(type)                                    \
+static int filter_pred_##type(struct filter_pred *pred, void *event,    \
+                              int val1, int val2)                       \
+{                                                                       \
+        type *addr = (type *)(event + pred->offset);                    \
+        type val = (type)pred->val;                                     \
+        int match = 0;                                                  \
+                                                                        \
+        switch (pred->op) {                                             \
+        case OP_LT:                                                     \
+                match = (*addr < val);                                  \
+                break;                                                  \
+        case OP_LE:                                                     \
+                match = (*addr <= val);                                 \
+                break;                                                  \
+        case OP_GT:                                                     \
+                match = (*addr > val);                                  \
+                break;                                                  \
+        case OP_GE:                                                     \
+                match = (*addr >= val);                                 \
+                break;                                                  \
+        default:                                                        \
+                break;                                                  \
+        }                                                               \
+                                                                        \
+        return match;                                                   \
+}
+
+#define DEFINE_EQUALITY_PRED(size)                                      \
+static int filter_pred_##size(struct filter_pred *pred, void *event,    \
+                              int val1, int val2)                       \
+{                                                                       \
+        u##size *addr = (u##size *)(event + pred->offset);              \
+        u##size val = (u##size)pred->val;                               \
+        int match;                                                      \
+                                                                        \
+        match = (val == *addr) ^ pred->not;                             \
+                                                                        \
+        return match;                                                   \
+}
+
+extern struct mutex event_mutex;
+extern struct list_head ftrace_events;
 
 extern const char *__start___trace_bprintk_fmt[];
 extern const char *__stop___trace_bprintk_fmt[];
 
-/*
- * The double __builtin_constant_p is because gcc will give us an error
- * if we try to allocate the static variable to fmt if it is not a
- * constant. Even with the outer if statement optimizing out.
- */
-#define event_trace_printk(ip, fmt, args...)                            \
-do {                                                                    \
-        __trace_printk_check_format(fmt, ##args);                       \
-        tracing_record_cmdline(current);                                \
-        if (__builtin_constant_p(fmt)) {                                \
-                static const char *trace_printk_fmt                     \
-                  __attribute__((section("__trace_printk_fmt"))) =      \
-                        __builtin_constant_p(fmt) ? fmt : NULL;         \
-                                                                        \
-                __trace_bprintk(ip, trace_printk_fmt, ##args);          \
-        } else                                                          \
-                __trace_printk(ip, fmt, ##args);                        \
-} while (0)
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
+        extern struct ftrace_event_call event_##call;
+#undef TRACE_EVENT_FORMAT_NOFILTER
+#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, tpfmt)
+#include "trace_event_types.h"
 
 #endif /* _LINUX_KERNEL_TRACE_H */