Commit 1c5eb448 authored by Steven Rostedt (VMware)'s avatar Steven Rostedt (VMware)
Browse files

tracing: Rename trace_buffer to array_buffer 

As we are working to remove the generic "ring_buffer" name that is used by
both tracing and perf, the ring_buffer name for tracing will be renamed to
trace_buffer, and perf's ring buffer will be renamed to perf_buffer.

As there already exists a trace_buffer that is used by the trace_arrays, it
needs to be first renamed to array_buffer.

Link: https://lore.kernel.org/r/20191213153553.GE20583@krava



Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 56de4e8f

include/linux/trace_events.h

+2 −2
Original line number Diff line number Diff line
@@ -11,7 +11,7 @@ 
#include <linux/tracepoint.h>



struct trace_array;

struct trace_buffer;

struct array_buffer;

struct tracer;

struct dentry;

struct bpf_prog;
@@ -79,7 +79,7 @@ struct trace_entry { 
struct trace_iterator {

	struct trace_array	*tr;

	struct tracer		*trace;

	struct trace_buffer	*trace_buffer;

	struct array_buffer	*array_buffer;

	void			*private;

	int			cpu_file;

	struct mutex		mutex;

kernel/trace/blktrace.c

+2 −2
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ static void trace_note(struct blk_trace *bt, pid_t pid, int action, 
	ssize_t cgid_len = cgid ? sizeof(cgid) : 0;



	if (blk_tracer) {

		buffer = blk_tr->trace_buffer.buffer;

		buffer = blk_tr->array_buffer.buffer;

		pc = preempt_count();

		event = trace_buffer_lock_reserve(buffer, TRACE_BLK,

						  sizeof(*t) + len + cgid_len,
@@ -248,7 +248,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes, 
	if (blk_tracer) {

		tracing_record_cmdline(current);



		buffer = blk_tr->trace_buffer.buffer;

		buffer = blk_tr->array_buffer.buffer;

		pc = preempt_count();

		event = trace_buffer_lock_reserve(buffer, TRACE_BLK,

						  sizeof(*t) + pdu_len + cgid_len,

kernel/trace/ftrace.c

+4 −4
Original line number Diff line number Diff line
@@ -146,7 +146,7 @@ static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip, 
{

	struct trace_array *tr = op->private;



	if (tr && this_cpu_read(tr->trace_buffer.data->ftrace_ignore_pid))

	if (tr && this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid))

		return;



	op->saved_func(ip, parent_ip, op, regs);
@@ -6922,7 +6922,7 @@ ftrace_filter_pid_sched_switch_probe(void *data, bool preempt, 


	pid_list = rcu_dereference_sched(tr->function_pids);



	this_cpu_write(tr->trace_buffer.data->ftrace_ignore_pid,

	this_cpu_write(tr->array_buffer.data->ftrace_ignore_pid,

		       trace_ignore_this_task(pid_list, next));

}
@@ -6976,7 +6976,7 @@ static void clear_ftrace_pids(struct trace_array *tr) 
	unregister_trace_sched_switch(ftrace_filter_pid_sched_switch_probe, tr);



	for_each_possible_cpu(cpu)

		per_cpu_ptr(tr->trace_buffer.data, cpu)->ftrace_ignore_pid = false;

		per_cpu_ptr(tr->array_buffer.data, cpu)->ftrace_ignore_pid = false;



	rcu_assign_pointer(tr->function_pids, NULL);
@@ -7100,7 +7100,7 @@ static void ignore_task_cpu(void *data) 
	pid_list = rcu_dereference_protected(tr->function_pids,

					     mutex_is_locked(&ftrace_lock));



	this_cpu_write(tr->trace_buffer.data->ftrace_ignore_pid,

	this_cpu_write(tr->array_buffer.data->ftrace_ignore_pid,

		       trace_ignore_this_task(pid_list, current));

}

kernel/trace/trace.c

+115 −115

File changed.

Preview size limit exceeded, changes collapsed.

kernel/trace/trace.h

+8 −8
Original line number Diff line number Diff line
@@ -176,7 +176,7 @@ struct trace_array_cpu { 
struct tracer;

struct trace_option_dentry;



struct trace_buffer {

struct array_buffer {

	struct trace_array		*tr;

	struct ring_buffer		*buffer;

	struct trace_array_cpu __percpu	*data;
@@ -249,7 +249,7 @@ struct cond_snapshot { 
struct trace_array {

	struct list_head	list;

	char			*name;

	struct trace_buffer	trace_buffer;

	struct array_buffer	array_buffer;

#ifdef CONFIG_TRACER_MAX_TRACE

	/*

	 * The max_buffer is used to snapshot the trace when a maximum
@@ -257,12 +257,12 @@ struct trace_array { 
	 * 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

	 * The buffers for the max_buffer are set up the same as the array_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.

	 * with the buffer of the array_buffer and the buffers are reset for

	 * the array_buffer so the tracing can continue.

	 */

	struct trace_buffer	max_buffer;

	struct array_buffer	max_buffer;

	bool			allocated_snapshot;

#endif

#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)
@@ -685,7 +685,7 @@ 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_online_cpus(struct trace_buffer *buf);

void tracing_reset_online_cpus(struct array_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);
@@ -1057,7 +1057,7 @@ struct ftrace_func_command { 
extern bool ftrace_filter_param __initdata;

static inline int ftrace_trace_task(struct trace_array *tr)

{

	return !this_cpu_read(tr->trace_buffer.data->ftrace_ignore_pid);

	return !this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid);

}

extern int ftrace_is_dead(void);

int ftrace_create_function_files(struct trace_array *tr,

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