summaryrefslogtreecommitdiff
path: root/kernel/trace/trace.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/trace/trace.h')
-rw-r--r--kernel/trace/trace.h239
1 files changed, 140 insertions, 99 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 85eabb454bee..b6d42fe06115 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -22,6 +22,7 @@
#include <linux/ctype.h>
#include <linux/once_lite.h>
#include <linux/ftrace_regs.h>
+#include <linux/llist.h>
#include "pid_list.h"
@@ -131,6 +132,8 @@ enum trace_type {
#define HIST_STACKTRACE_SIZE (HIST_STACKTRACE_DEPTH * sizeof(unsigned long))
#define HIST_STACKTRACE_SKIP 5
+#define SYSCALL_FAULT_USER_MAX 165
+
/*
* syscalls are special, and need special handling, this is why
* they are not included in trace_entries.h
@@ -216,7 +219,7 @@ struct array_buffer {
int cpu;
};
-#define TRACE_FLAGS_MAX_SIZE 32
+#define TRACE_FLAGS_MAX_SIZE 64
struct trace_options {
struct tracer *tracer;
@@ -390,7 +393,8 @@ struct trace_array {
int buffer_percent;
unsigned int n_err_log_entries;
struct tracer *current_trace;
- unsigned int trace_flags;
+ struct tracer_flags *current_trace_flags;
+ u64 trace_flags;
unsigned char trace_flags_index[TRACE_FLAGS_MAX_SIZE];
unsigned int flags;
raw_spinlock_t start_lock;
@@ -404,6 +408,7 @@ struct trace_array {
struct list_head systems;
struct list_head events;
struct list_head marker_list;
+ struct list_head tracers;
struct trace_event_file *trace_marker_file;
cpumask_var_t tracing_cpumask; /* only trace on set CPUs */
/* one per_cpu trace_pipe can be opened by only one user */
@@ -430,6 +435,7 @@ struct trace_array {
int function_enabled;
#endif
int no_filter_buffering_ref;
+ unsigned int syscall_buf_sz;
struct list_head hist_vars;
#ifdef CONFIG_TRACER_SNAPSHOT
struct cond_snapshot *cond_snapshot;
@@ -448,6 +454,7 @@ enum {
TRACE_ARRAY_FL_LAST_BOOT = BIT(2),
TRACE_ARRAY_FL_MOD_INIT = BIT(3),
TRACE_ARRAY_FL_MEMMAP = BIT(4),
+ TRACE_ARRAY_FL_VMALLOC = BIT(5),
};
#ifdef CONFIG_MODULES
@@ -631,9 +638,10 @@ struct tracer {
u32 old_flags, u32 bit, int set);
/* Return 0 if OK with change, else return non-zero */
int (*flag_changed)(struct trace_array *tr,
- u32 mask, int set);
+ u64 mask, int set);
struct tracer *next;
struct tracer_flags *flags;
+ struct tracer_flags *default_flags;
int enabled;
bool print_max;
bool allow_instances;
@@ -937,8 +945,6 @@ static __always_inline bool ftrace_hash_empty(struct ftrace_hash *hash)
#define TRACE_GRAPH_PRINT_FILL_SHIFT 28
#define TRACE_GRAPH_PRINT_FILL_MASK (0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT)
-extern void ftrace_graph_sleep_time_control(bool enable);
-
#ifdef CONFIG_FUNCTION_PROFILER
extern void ftrace_graph_graph_time_control(bool enable);
#else
@@ -958,7 +964,8 @@ extern int __trace_graph_entry(struct trace_array *tr,
extern int __trace_graph_retaddr_entry(struct trace_array *tr,
struct ftrace_graph_ent *trace,
unsigned int trace_ctx,
- unsigned long retaddr);
+ unsigned long retaddr,
+ struct ftrace_regs *fregs);
extern void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned int trace_ctx,
@@ -1109,7 +1116,8 @@ static inline void ftrace_graph_addr_finish(struct fgraph_ops *gops, struct ftra
#endif /* CONFIG_DYNAMIC_FTRACE */
extern unsigned int fgraph_max_depth;
-extern bool fgraph_sleep_time;
+extern int fgraph_no_sleep_time;
+extern bool fprofile_no_sleep_time;
static inline bool
ftrace_graph_ignore_func(struct fgraph_ops *gops, struct ftrace_graph_ent *trace)
@@ -1154,11 +1162,6 @@ struct ftrace_func_command {
char *params, int enable);
};
extern bool ftrace_filter_param __initdata;
-static inline int ftrace_trace_task(struct trace_array *tr)
-{
- return this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid) !=
- FTRACE_PID_IGNORE;
-}
extern int ftrace_is_dead(void);
int ftrace_create_function_files(struct trace_array *tr,
struct dentry *parent);
@@ -1176,10 +1179,6 @@ void ftrace_clear_pids(struct trace_array *tr);
int init_function_trace(void);
void ftrace_pid_follow_fork(struct trace_array *tr, bool enable);
#else
-static inline int ftrace_trace_task(struct trace_array *tr)
-{
- return 1;
-}
static inline int ftrace_is_dead(void) { return 0; }
static inline int
ftrace_create_function_files(struct trace_array *tr,
@@ -1345,11 +1344,11 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
# define FUNCTION_FLAGS \
C(FUNCTION, "function-trace"), \
C(FUNC_FORK, "function-fork"),
-# define FUNCTION_DEFAULT_FLAGS TRACE_ITER_FUNCTION
+# define FUNCTION_DEFAULT_FLAGS TRACE_ITER(FUNCTION)
#else
# define FUNCTION_FLAGS
# define FUNCTION_DEFAULT_FLAGS 0UL
-# define TRACE_ITER_FUNC_FORK 0UL
+# define TRACE_ITER_FUNC_FORK_BIT -1
#endif
#ifdef CONFIG_STACKTRACE
@@ -1359,6 +1358,24 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
# define STACK_FLAGS
#endif
+#ifdef CONFIG_FUNCTION_PROFILER
+# define PROFILER_FLAGS \
+ C(PROF_TEXT_OFFSET, "prof-text-offset"),
+# ifdef CONFIG_FUNCTION_GRAPH_TRACER
+# define FPROFILE_FLAGS \
+ C(GRAPH_TIME, "graph-time"),
+# define FPROFILE_DEFAULT_FLAGS TRACE_ITER(GRAPH_TIME)
+# else
+# define FPROFILE_FLAGS
+# define FPROFILE_DEFAULT_FLAGS 0UL
+# endif
+#else
+# define PROFILER_FLAGS
+# define FPROFILE_FLAGS
+# define FPROFILE_DEFAULT_FLAGS 0UL
+# define TRACE_ITER_PROF_TEXT_OFFSET_BIT -1
+#endif
+
/*
* trace_iterator_flags is an enumeration that defines bit
* positions into trace_flags that controls the output.
@@ -1391,13 +1408,15 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
C(MARKERS, "markers"), \
C(EVENT_FORK, "event-fork"), \
C(TRACE_PRINTK, "trace_printk_dest"), \
- C(COPY_MARKER, "copy_trace_marker"),\
+ C(COPY_MARKER, "copy_trace_marker"), \
C(PAUSE_ON_TRACE, "pause-on-trace"), \
C(HASH_PTR, "hash-ptr"), /* Print hashed pointer */ \
FUNCTION_FLAGS \
FGRAPH_FLAGS \
STACK_FLAGS \
- BRANCH_FLAGS
+ BRANCH_FLAGS \
+ PROFILER_FLAGS \
+ FPROFILE_FLAGS
/*
* By defining C, we can make TRACE_FLAGS a list of bit names
@@ -1413,20 +1432,17 @@ enum trace_iterator_bits {
};
/*
- * By redefining C, we can make TRACE_FLAGS a list of masks that
- * use the bits as defined above.
+ * And use TRACE_ITER(flag) to define the bit masks.
*/
-#undef C
-#define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
-
-enum trace_iterator_flags { TRACE_FLAGS };
+#define TRACE_ITER(flag) \
+ (TRACE_ITER_##flag##_BIT < 0 ? 0 : 1ULL << (TRACE_ITER_##flag##_BIT))
/*
* TRACE_ITER_SYM_MASK masks the options in trace_flags that
* control the output of kernel symbols.
*/
#define TRACE_ITER_SYM_MASK \
- (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
+ (TRACE_ITER(PRINT_PARENT)|TRACE_ITER(SYM_OFFSET)|TRACE_ITER(SYM_ADDR))
extern struct tracer nop_trace;
@@ -1435,7 +1451,7 @@ extern int enable_branch_tracing(struct trace_array *tr);
extern void disable_branch_tracing(void);
static inline int trace_branch_enable(struct trace_array *tr)
{
- if (tr->trace_flags & TRACE_ITER_BRANCH)
+ if (tr->trace_flags & TRACE_ITER(BRANCH))
return enable_branch_tracing(tr);
return 0;
}
@@ -1531,6 +1547,23 @@ void trace_buffered_event_enable(void);
void early_enable_events(struct trace_array *tr, char *buf, bool disable_first);
+struct trace_user_buf;
+struct trace_user_buf_info {
+ struct trace_user_buf __percpu *tbuf;
+ size_t size;
+ int ref;
+};
+
+typedef int (*trace_user_buf_copy)(char *dst, const char __user *src,
+ size_t size, void *data);
+int trace_user_fault_init(struct trace_user_buf_info *tinfo, size_t size);
+int trace_user_fault_get(struct trace_user_buf_info *tinfo);
+int trace_user_fault_put(struct trace_user_buf_info *tinfo);
+void trace_user_fault_destroy(struct trace_user_buf_info *tinfo);
+char *trace_user_fault_read(struct trace_user_buf_info *tinfo,
+ const char __user *ptr, size_t size,
+ trace_user_buf_copy copy_func, void *data);
+
static inline void
__trace_event_discard_commit(struct trace_buffer *buffer,
struct ring_buffer_event *event)
@@ -1752,13 +1785,13 @@ extern void clear_event_triggers(struct trace_array *tr);
enum {
EVENT_TRIGGER_FL_PROBE = BIT(0),
+ EVENT_TRIGGER_FL_COUNT = BIT(1),
};
struct event_trigger_data {
unsigned long count;
int ref;
int flags;
- const struct event_trigger_ops *ops;
struct event_command *cmd_ops;
struct event_filter __rcu *filter;
char *filter_str;
@@ -1769,6 +1802,7 @@ struct event_trigger_data {
char *name;
struct list_head named_list;
struct event_trigger_data *named_data;
+ struct llist_node llist;
};
/* Avoid typos */
@@ -1783,6 +1817,10 @@ struct enable_trigger_data {
bool hist;
};
+bool event_trigger_count(struct event_trigger_data *data,
+ struct trace_buffer *buffer, void *rec,
+ struct ring_buffer_event *event);
+
extern int event_enable_trigger_print(struct seq_file *m,
struct event_trigger_data *data);
extern void event_enable_trigger_free(struct event_trigger_data *data);
@@ -1846,64 +1884,6 @@ extern void event_file_get(struct trace_event_file *file);
extern void event_file_put(struct trace_event_file *file);
/**
- * struct event_trigger_ops - callbacks for trace event triggers
- *
- * The methods in this structure provide per-event trigger hooks for
- * various trigger operations.
- *
- * The @init and @free methods are used during trigger setup and
- * teardown, typically called from an event_command's @parse()
- * function implementation.
- *
- * The @print method is used to print the trigger spec.
- *
- * The @trigger method is the function that actually implements the
- * trigger and is called in the context of the triggering event
- * whenever that event occurs.
- *
- * All the methods below, except for @init() and @free(), must be
- * implemented.
- *
- * @trigger: The trigger 'probe' function called when the triggering
- * event occurs. The data passed into this callback is the data
- * that was supplied to the event_command @reg() function that
- * registered the trigger (see struct event_command) along with
- * the trace record, rec.
- *
- * @init: An optional initialization function called for the trigger
- * when the trigger is registered (via the event_command reg()
- * function). This can be used to perform per-trigger
- * initialization such as incrementing a per-trigger reference
- * count, for instance. This is usually implemented by the
- * generic utility function @event_trigger_init() (see
- * trace_event_triggers.c).
- *
- * @free: An optional de-initialization function called for the
- * trigger when the trigger is unregistered (via the
- * event_command @reg() function). This can be used to perform
- * per-trigger de-initialization such as decrementing a
- * per-trigger reference count and freeing corresponding trigger
- * data, for instance. This is usually implemented by the
- * generic utility function @event_trigger_free() (see
- * trace_event_triggers.c).
- *
- * @print: The callback function invoked to have the trigger print
- * itself. This is usually implemented by a wrapper function
- * that calls the generic utility function @event_trigger_print()
- * (see trace_event_triggers.c).
- */
-struct event_trigger_ops {
- void (*trigger)(struct event_trigger_data *data,
- struct trace_buffer *buffer,
- void *rec,
- struct ring_buffer_event *rbe);
- int (*init)(struct event_trigger_data *data);
- void (*free)(struct event_trigger_data *data);
- int (*print)(struct seq_file *m,
- struct event_trigger_data *data);
-};
-
-/**
* struct event_command - callbacks and data members for event commands
*
* Event commands are invoked by users by writing the command name
@@ -1952,7 +1932,7 @@ struct event_trigger_ops {
*
* @reg: Adds the trigger to the list of triggers associated with the
* event, and enables the event trigger itself, after
- * initializing it (via the event_trigger_ops @init() function).
+ * initializing it (via the event_command @init() function).
* This is also where commands can use the @trigger_type value to
* make the decision as to whether or not multiple instances of
* the trigger should be allowed. This is usually implemented by
@@ -1961,7 +1941,7 @@ struct event_trigger_ops {
*
* @unreg: Removes the trigger from the list of triggers associated
* with the event, and disables the event trigger itself, after
- * initializing it (via the event_trigger_ops @free() function).
+ * initializing it (via the event_command @free() function).
* This is usually implemented by the generic utility function
* @unregister_trigger() (see trace_event_triggers.c).
*
@@ -1975,12 +1955,41 @@ struct event_trigger_ops {
* ignored. This is usually implemented by the generic utility
* function @set_trigger_filter() (see trace_event_triggers.c).
*
- * @get_trigger_ops: The callback function invoked to retrieve the
- * event_trigger_ops implementation associated with the command.
- * This callback function allows a single event_command to
- * support multiple trigger implementations via different sets of
- * event_trigger_ops, depending on the value of the @param
- * string.
+ * All the methods below, except for @init() and @free(), must be
+ * implemented.
+ *
+ * @trigger: The trigger 'probe' function called when the triggering
+ * event occurs. The data passed into this callback is the data
+ * that was supplied to the event_command @reg() function that
+ * registered the trigger (see struct event_command) along with
+ * the trace record, rec.
+ *
+ * @count_func: If defined and a numeric parameter is passed to the
+ * trigger, then this function will be called before @trigger
+ * is called. If this function returns false, then @trigger is not
+ * executed.
+ *
+ * @init: An optional initialization function called for the trigger
+ * when the trigger is registered (via the event_command reg()
+ * function). This can be used to perform per-trigger
+ * initialization such as incrementing a per-trigger reference
+ * count, for instance. This is usually implemented by the
+ * generic utility function @event_trigger_init() (see
+ * trace_event_triggers.c).
+ *
+ * @free: An optional de-initialization function called for the
+ * trigger when the trigger is unregistered (via the
+ * event_command @reg() function). This can be used to perform
+ * per-trigger de-initialization such as decrementing a
+ * per-trigger reference count and freeing corresponding trigger
+ * data, for instance. This is usually implemented by the
+ * generic utility function @event_trigger_free() (see
+ * trace_event_triggers.c).
+ *
+ * @print: The callback function invoked to have the trigger print
+ * itself. This is usually implemented by a wrapper function
+ * that calls the generic utility function @event_trigger_print()
+ * (see trace_event_triggers.c).
*/
struct event_command {
struct list_head list;
@@ -2001,7 +2010,18 @@ struct event_command {
int (*set_filter)(char *filter_str,
struct event_trigger_data *data,
struct trace_event_file *file);
- const struct event_trigger_ops *(*get_trigger_ops)(char *cmd, char *param);
+ void (*trigger)(struct event_trigger_data *data,
+ struct trace_buffer *buffer,
+ void *rec,
+ struct ring_buffer_event *rbe);
+ bool (*count_func)(struct event_trigger_data *data,
+ struct trace_buffer *buffer,
+ void *rec,
+ struct ring_buffer_event *rbe);
+ int (*init)(struct event_trigger_data *data);
+ void (*free)(struct event_trigger_data *data);
+ int (*print)(struct seq_file *m,
+ struct event_trigger_data *data);
};
/**
@@ -2022,7 +2042,7 @@ struct event_command {
* either committed or discarded. At that point, if any commands
* have deferred their triggers, those commands are finally
* invoked following the close of the current event. In other
- * words, if the event_trigger_ops @func() probe implementation
+ * words, if the event_command @func() probe implementation
* itself logs to the trace buffer, this flag should be set,
* otherwise it can be left unspecified.
*
@@ -2064,8 +2084,8 @@ extern const char *__stop___tracepoint_str[];
void trace_printk_control(bool enabled);
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);
+int trace_keep_overwrite(struct tracer *tracer, u64 mask, int set);
+int set_tracer_flag(struct trace_array *tr, u64 mask, int enabled);
/* Used from boot time tracer */
extern int trace_set_options(struct trace_array *tr, char *option);
@@ -2248,4 +2268,25 @@ static inline int rv_init_interface(void)
*/
#define FTRACE_TRAMPOLINE_MARKER ((unsigned long) INT_MAX)
+/*
+ * This is used to get the address of the args array based on
+ * the type of the entry.
+ */
+#define FGRAPH_ENTRY_ARGS(e) \
+ ({ \
+ unsigned long *_args; \
+ struct ftrace_graph_ent_entry *_e = e; \
+ \
+ if (IS_ENABLED(CONFIG_FUNCTION_GRAPH_RETADDR) && \
+ e->ent.type == TRACE_GRAPH_RETADDR_ENT) { \
+ struct fgraph_retaddr_ent_entry *_re; \
+ \
+ _re = (typeof(_re))_e; \
+ _args = _re->args; \
+ } else { \
+ _args = _e->args; \
+ } \
+ _args; \
+ })
+
#endif /* _LINUX_KERNEL_TRACE_H */
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-06 04:25:00 +0000