Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 447bd96..d685c61 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -15,7 +15,6 @@
#include <linux/trace_seq.h>
#include <linux/trace_events.h>
#include <linux/compiler.h>
-#include <linux/trace_seq.h>
#include <linux/glob.h>
#ifdef CONFIG_FTRACE_SYSCALLS
@@ -194,6 +193,51 @@
unsigned long *pids;
};
+typedef bool (*cond_update_fn_t)(struct trace_array *tr, void *cond_data);
+
+/**
+ * struct cond_snapshot - conditional snapshot data and callback
+ *
+ * The cond_snapshot structure encapsulates a callback function and
+ * data associated with the snapshot for a given tracing instance.
+ *
+ * When a snapshot is taken conditionally, by invoking
+ * tracing_snapshot_cond(tr, cond_data), the cond_data passed in is
+ * passed in turn to the cond_snapshot.update() function. That data
+ * can be compared by the update() implementation with the cond_data
+ * contained wihin the struct cond_snapshot instance associated with
+ * the trace_array. Because the tr->max_lock is held throughout the
+ * update() call, the update() function can directly retrieve the
+ * cond_snapshot and cond_data associated with the per-instance
+ * snapshot associated with the trace_array.
+ *
+ * The cond_snapshot.update() implementation can save data to be
+ * associated with the snapshot if it decides to, and returns 'true'
+ * in that case, or it returns 'false' if the conditional snapshot
+ * shouldn't be taken.
+ *
+ * The cond_snapshot instance is created and associated with the
+ * user-defined cond_data by tracing_cond_snapshot_enable().
+ * Likewise, the cond_snapshot instance is destroyed and is no longer
+ * associated with the trace instance by
+ * tracing_cond_snapshot_disable().
+ *
+ * The method below is required.
+ *
+ * @update: When a conditional snapshot is invoked, the update()
+ * callback function is invoked with the tr->max_lock held. The
+ * update() implementation signals whether or not to actually
+ * take the snapshot, by returning 'true' if so, 'false' if no
+ * snapshot should be taken. Because the max_lock is held for
+ * the duration of update(), the implementation is safe to
+ * directly retrieven and save any implementation data it needs
+ * to in association with the snapshot.
+ */
+struct cond_snapshot {
+ void *cond_data;
+ cond_update_fn_t update;
+};
+
/*
* The trace array - an array of per-CPU trace arrays. This is the
* highest level data structure that individual tracers deal with.
@@ -247,11 +291,14 @@
int clock_id;
int nr_topts;
bool clear_trace;
+ int buffer_percent;
+ unsigned int n_err_log_entries;
struct tracer *current_trace;
unsigned int trace_flags;
unsigned char trace_flags_index[TRACE_FLAGS_MAX_SIZE];
unsigned int flags;
raw_spinlock_t start_lock;
+ struct list_head err_log;
struct dentry *dir;
struct dentry *options;
struct dentry *percpu_dir;
@@ -276,6 +323,9 @@
#endif
int time_stamp_abs_ref;
struct list_head hist_vars;
+#ifdef CONFIG_TRACER_SNAPSHOT
+ struct cond_snapshot *cond_snapshot;
+#endif
};
enum {
@@ -288,6 +338,7 @@
extern int trace_array_get(struct trace_array *tr);
extern void trace_array_put(struct trace_array *tr);
+extern int tracing_check_open_get_tr(struct trace_array *tr);
extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs);
extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
@@ -315,11 +366,11 @@
__builtin_types_compatible_p(typeof(var), type *)
#undef IF_ASSIGN
-#define IF_ASSIGN(var, entry, etype, id) \
- if (FTRACE_CMP_TYPE(var, etype)) { \
- var = (typeof(var))(entry); \
- WARN_ON(id && (entry)->type != id); \
- break; \
+#define IF_ASSIGN(var, entry, etype, id) \
+ if (FTRACE_CMP_TYPE(var, etype)) { \
+ var = (typeof(var))(entry); \
+ WARN_ON(id != 0 && (entry)->type != id); \
+ break; \
}
/* Will cause compile errors if type is not found. */
@@ -534,6 +585,13 @@
TRACE_GRAPH_DEPTH_START_BIT,
TRACE_GRAPH_DEPTH_END_BIT,
+
+ /*
+ * To implement set_graph_notrace, if this bit is set, we ignore
+ * function graph tracing of called functions, until the return
+ * function is called to clear it.
+ */
+ TRACE_GRAPH_NOTRACE_BIT,
};
#define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0)
@@ -620,11 +678,11 @@
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
-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_all_online_cpus(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
+int tracing_open_generic_tr(struct inode *inode, struct file *filp);
bool tracing_is_disabled(void);
bool tracer_tracing_is_on(struct trace_array *tr);
void tracer_tracing_on(struct trace_array *tr);
@@ -663,6 +721,9 @@
void tracing_iter_reset(struct trace_iterator *iter, int cpu);
+unsigned long trace_total_entries_cpu(struct trace_array *tr, int cpu);
+unsigned long trace_total_entries(struct trace_array *tr);
+
void trace_function(struct trace_array *tr,
unsigned long ip,
unsigned long parent_ip,
@@ -719,23 +780,16 @@
const char __user *ubuf, size_t cnt);
#ifdef CONFIG_TRACER_MAX_TRACE
-void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
+void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu,
+ void *cond_data);
void update_max_tr_single(struct trace_array *tr,
struct task_struct *tsk, int cpu);
#endif /* CONFIG_TRACER_MAX_TRACE */
#ifdef CONFIG_STACKTRACE
-void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
- int pc);
-
void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
int pc);
#else
-static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
- unsigned long flags, int pc)
-{
-}
-
static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
int skip, int pc)
{
@@ -847,15 +901,21 @@
#define TRACE_GRAPH_PRINT_PROC 0x8
#define TRACE_GRAPH_PRINT_DURATION 0x10
#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
-#define TRACE_GRAPH_PRINT_IRQS 0x40
-#define TRACE_GRAPH_PRINT_TAIL 0x80
-#define TRACE_GRAPH_SLEEP_TIME 0x100
-#define TRACE_GRAPH_GRAPH_TIME 0x200
+#define TRACE_GRAPH_PRINT_REL_TIME 0x40
+#define TRACE_GRAPH_PRINT_IRQS 0x80
+#define TRACE_GRAPH_PRINT_TAIL 0x100
+#define TRACE_GRAPH_SLEEP_TIME 0x200
+#define TRACE_GRAPH_GRAPH_TIME 0x400
#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
+static inline void ftrace_graph_graph_time_control(bool enable) { }
+#endif
extern enum print_line_t
print_graph_function_flags(struct trace_iterator *iter, u32 flags);
@@ -1445,6 +1505,7 @@
MATCH_MIDDLE_ONLY,
MATCH_END_ONLY,
MATCH_GLOB,
+ MATCH_INDEX,
};
struct regex {
@@ -1489,7 +1550,8 @@
extern void print_subsystem_event_filter(struct event_subsystem *system,
struct trace_seq *s);
extern int filter_assign_type(const char *type);
-extern int create_event_filter(struct trace_event_call *call,
+extern int create_event_filter(struct trace_array *tr,
+ struct trace_event_call *call,
char *filter_str, bool set_str,
struct event_filter **filterp);
extern void free_event_filter(struct event_filter *filter);
@@ -1795,6 +1857,11 @@
extern int trace_event_enable_disable(struct trace_event_file *file,
int enable, int soft_disable);
extern int tracing_alloc_snapshot(void);
+extern void tracing_snapshot_cond(struct trace_array *tr, void *cond_data);
+extern int tracing_snapshot_cond_enable(struct trace_array *tr, void *cond_data, cond_update_fn_t update);
+
+extern int tracing_snapshot_cond_disable(struct trace_array *tr);
+extern void *tracing_cond_snapshot_data(struct trace_array *tr);
extern const char *__start___trace_bprintk_fmt[];
extern const char *__stop___trace_bprintk_fmt[];
@@ -1815,6 +1882,11 @@
const char __user *buffer, size_t count, loff_t *ppos,
int (*createfn)(int, char**));
+extern unsigned int err_pos(char *cmd, const char *str);
+extern void tracing_log_err(struct trace_array *tr,
+ const char *loc, const char *cmd,
+ const char **errs, u8 type, u8 pos);
+
/*
* Normal trace_printk() and friends allocates special buffers
* to do the manipulation, as well as saves the print formats
@@ -1895,4 +1967,22 @@
extern struct trace_iterator *tracepoint_print_iter;
+/*
+ * Reset the state of the trace_iterator so that it can read consumed data.
+ * Normally, the trace_iterator is used for reading the data when it is not
+ * consumed, and must retain state.
+ */
+static __always_inline void trace_iterator_reset(struct trace_iterator *iter)
+{
+ const size_t offset = offsetof(struct trace_iterator, seq);
+
+ /*
+ * Keep gcc from complaining about overwriting more than just one
+ * member in the structure.
+ */
+ memset((char *)iter + offset, 0, sizeof(struct trace_iterator) - offset);
+
+ iter->pos = -1;
+}
+
#endif /* _LINUX_KERNEL_TRACE_H */