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tracing: Remove TRACE_EVENT_FL_FILTERED logic

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After commit dcb0b5575d ("tracing: Remove TRACE_EVENT_FL_USE_CALL_FILTER
 logic"), no one's going to set the TRACE_EVENT_FL_FILTERED or change the
call->filter, so remove related logic.

Link: https://lore.kernel.org/20240911010026.2302849-1-zhengyejian@huaweicloud.com
Signed-off-by: Zheng Yejian <zhengyejian@huaweicloud.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Zheng Yejian 2024-09-11 09:00:26 +08:00 committed by Steven Rostedt (Google)
parent 2aa746ec02
commit 49e4154f4b
10 changed files with 20 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/trace_events.h
View File

@ -326,7 +326,6 @@ void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
enum {
TRACE_EVENT_FL_FILTERED_BIT,
TRACE_EVENT_FL_CAP_ANY_BIT,
TRACE_EVENT_FL_NO_SET_FILTER_BIT,
TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
@ -341,7 +340,6 @@ enum {
/*
* Event flags:
* FILTERED - The event has a filter attached
* CAP_ANY - Any user can enable for perf
* NO_SET_FILTER - Set when filter has error and is to be ignored
* IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
@ -356,7 +354,6 @@ enum {
* to a tracepoint yet, then it is cleared when it is.
*/
enum {
TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
@ -381,7 +378,6 @@ struct trace_event_call {
};
struct trace_event event;
char *print_fmt;
struct event_filter *filter;
/*
* Static events can disappear with modules,
* where as dynamic ones need their own ref count.

44
kernel/trace/trace.c
View File

@ -593,19 +593,6 @@ int tracing_check_open_get_tr(struct trace_array *tr)
return 0;
}
int call_filter_check_discard(struct trace_event_call *call, void *rec,
struct trace_buffer *buffer,
struct ring_buffer_event *event)
{
if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
!filter_match_preds(call->filter, rec)) {
__trace_event_discard_commit(buffer, event);
return 1;
}
return 0;
}
/**
* trace_find_filtered_pid - check if a pid exists in a filtered_pid list
* @filtered_pids: The list of pids to check
@ -2889,7 +2876,6 @@ void
trace_function(struct trace_array *tr, unsigned long ip, unsigned long
parent_ip, unsigned int trace_ctx)
{
struct trace_event_call *call = &event_function;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ring_buffer_event *event;
struct ftrace_entry *entry;
@ -2902,11 +2888,9 @@ trace_function(struct trace_array *tr, unsigned long ip, unsigned long
entry->ip = ip;
entry->parent_ip = parent_ip;
if (!call_filter_check_discard(call, entry, buffer, event)) {
if (static_branch_unlikely(&trace_function_exports_enabled))
ftrace_exports(event, TRACE_EXPORT_FUNCTION);
__buffer_unlock_commit(buffer, event);
}
if (static_branch_unlikely(&trace_function_exports_enabled))
ftrace_exports(event, TRACE_EXPORT_FUNCTION);
__buffer_unlock_commit(buffer, event);
}
#ifdef CONFIG_STACKTRACE
@ -2932,7 +2916,6 @@ static void __ftrace_trace_stack(struct trace_buffer *buffer,
unsigned int trace_ctx,
int skip, struct pt_regs *regs)
{
struct trace_event_call *call = &event_kernel_stack;
struct ring_buffer_event *event;
unsigned int size, nr_entries;
struct ftrace_stack *fstack;
@ -2986,8 +2969,7 @@ static void __ftrace_trace_stack(struct trace_buffer *buffer,
memcpy(&entry->caller, fstack->calls,
flex_array_size(entry, caller, nr_entries));
if (!call_filter_check_discard(call, entry, buffer, event))
__buffer_unlock_commit(buffer, event);
__buffer_unlock_commit(buffer, event);
out:
/* Again, don't let gcc optimize things here */
@ -3060,7 +3042,6 @@ static void
ftrace_trace_userstack(struct trace_array *tr,
struct trace_buffer *buffer, unsigned int trace_ctx)
{
struct trace_event_call *call = &event_user_stack;
struct ring_buffer_event *event;
struct userstack_entry *entry;
@ -3094,8 +3075,7 @@ ftrace_trace_userstack(struct trace_array *tr,
memset(&entry->caller, 0, sizeof(entry->caller));
stack_trace_save_user(entry->caller, FTRACE_STACK_ENTRIES);
if (!call_filter_check_discard(call, entry, buffer, event))
__buffer_unlock_commit(buffer, event);
__buffer_unlock_commit(buffer, event);
out_drop_count:
__this_cpu_dec(user_stack_count);
@ -3264,7 +3244,6 @@ static void trace_printk_start_stop_comm(int enabled)
*/
int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
{
struct trace_event_call *call = &event_bprint;
struct ring_buffer_event *event;
struct trace_buffer *buffer;
struct trace_array *tr = READ_ONCE(printk_trace);
@ -3308,10 +3287,8 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
entry->fmt = fmt;
memcpy(entry->buf, tbuffer, sizeof(u32) * len);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
ftrace_trace_stack(tr, buffer, trace_ctx, 6, NULL);
}
__buffer_unlock_commit(buffer, event);
ftrace_trace_stack(tr, buffer, trace_ctx, 6, NULL);
out:
ring_buffer_nest_end(buffer);
@ -3331,7 +3308,6 @@ static int
__trace_array_vprintk(struct trace_buffer *buffer,
unsigned long ip, const char *fmt, va_list args)
{
struct trace_event_call *call = &event_print;
struct ring_buffer_event *event;
int len = 0, size;
struct print_entry *entry;
@ -3366,10 +3342,8 @@ __trace_array_vprintk(struct trace_buffer *buffer,
entry->ip = ip;
memcpy(&entry->buf, tbuffer, len + 1);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
ftrace_trace_stack(printk_trace, buffer, trace_ctx, 6, NULL);
}
__buffer_unlock_commit(buffer, event);
ftrace_trace_stack(printk_trace, buffer, trace_ctx, 6, NULL);
out:
ring_buffer_nest_end(buffer);

4
kernel/trace/trace.h
View File

@ -1429,10 +1429,6 @@ struct trace_subsystem_dir {
int nr_events;
};
extern int call_filter_check_discard(struct trace_event_call *call, void *rec,
struct trace_buffer *buffer,
struct ring_buffer_event *event);
void trace_buffer_unlock_commit_regs(struct trace_array *tr,
struct trace_buffer *buffer,
struct ring_buffer_event *event,

4
kernel/trace/trace_branch.c
View File

@ -30,7 +30,6 @@ static struct trace_array *branch_tracer;
static void
probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
{
struct trace_event_call *call = &event_branch;
struct trace_array *tr = branch_tracer;
struct trace_buffer *buffer;
struct trace_array_cpu *data;
@ -80,8 +79,7 @@ probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
entry->line = f->data.line;
entry->correct = val == expect;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
out:
current->trace_recursion &= ~TRACE_BRANCH_BIT;

2
kernel/trace/trace_events.c
View File

@ -3149,8 +3149,6 @@ static void __trace_remove_event_call(struct trace_event_call *call)
{
event_remove(call);
trace_destroy_fields(call);
free_event_filter(call->filter);
call->filter = NULL;
}
static int probe_remove_event_call(struct trace_event_call *call)

8
kernel/trace/trace_functions_graph.c
View File

@ -102,7 +102,6 @@ int __trace_graph_entry(struct trace_array *tr,
struct ftrace_graph_ent *trace,
unsigned int trace_ctx)
{
struct trace_event_call *call = &event_funcgraph_entry;
struct ring_buffer_event *event;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ftrace_graph_ent_entry *entry;
@ -113,8 +112,7 @@ int __trace_graph_entry(struct trace_array *tr,
return 0;
entry = ring_buffer_event_data(event);
entry->graph_ent = *trace;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
return 1;
}
@ -223,7 +221,6 @@ void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned int trace_ctx)
{
struct trace_event_call *call = &event_funcgraph_exit;
struct ring_buffer_event *event;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ftrace_graph_ret_entry *entry;
@ -234,8 +231,7 @@ void __trace_graph_return(struct trace_array *tr,
return;
entry = ring_buffer_event_data(event);
entry->ret = *trace;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
}
void trace_graph_return(struct ftrace_graph_ret *trace,

4
kernel/trace/trace_hwlat.c
View File

@ -130,7 +130,6 @@ static bool hwlat_busy;
static void trace_hwlat_sample(struct hwlat_sample *sample)
{
struct trace_array *tr = hwlat_trace;
struct trace_event_call *call = &event_hwlat;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ring_buffer_event *event;
struct hwlat_entry *entry;
@ -148,8 +147,7 @@ static void trace_hwlat_sample(struct hwlat_sample *sample)
entry->nmi_count = sample->nmi_count;
entry->count = sample->count;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
}
/* Macros to encapsulate the time capturing infrastructure */

8
kernel/trace/trace_mmiotrace.c
View File

@ -294,7 +294,6 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
struct trace_array_cpu *data,
struct mmiotrace_rw *rw)
{
struct trace_event_call *call = &event_mmiotrace_rw;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ring_buffer_event *event;
struct trace_mmiotrace_rw *entry;
@ -310,8 +309,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
entry = ring_buffer_event_data(event);
entry->rw = *rw;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
}
void mmio_trace_rw(struct mmiotrace_rw *rw)
@ -325,7 +323,6 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
struct trace_array_cpu *data,
struct mmiotrace_map *map)
{
struct trace_event_call *call = &event_mmiotrace_map;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ring_buffer_event *event;
struct trace_mmiotrace_map *entry;
@ -341,8 +338,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
entry = ring_buffer_event_data(event);
entry->map = *map;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
}
void mmio_trace_mapping(struct mmiotrace_map *map)

12
kernel/trace/trace_osnoise.c
View File

@ -499,7 +499,6 @@ static void print_osnoise_headers(struct seq_file *s)
static void
__trace_osnoise_sample(struct osnoise_sample *sample, struct trace_buffer *buffer)
{
struct trace_event_call *call = &event_osnoise;
struct ring_buffer_event *event;
struct osnoise_entry *entry;
@ -517,8 +516,7 @@ __trace_osnoise_sample(struct osnoise_sample *sample, struct trace_buffer *buffe
entry->softirq_count = sample->softirq_count;
entry->thread_count = sample->thread_count;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
}
/*
@ -578,7 +576,6 @@ static void print_timerlat_headers(struct seq_file *s)
static void
__trace_timerlat_sample(struct timerlat_sample *sample, struct trace_buffer *buffer)
{
struct trace_event_call *call = &event_osnoise;
struct ring_buffer_event *event;
struct timerlat_entry *entry;
@ -591,8 +588,7 @@ __trace_timerlat_sample(struct timerlat_sample *sample, struct trace_buffer *buf
entry->context = sample->context;
entry->timer_latency = sample->timer_latency;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
}
/*
@ -654,7 +650,6 @@ static void timerlat_save_stack(int skip)
static void
__timerlat_dump_stack(struct trace_buffer *buffer, struct trace_stack *fstack, unsigned int size)
{
struct trace_event_call *call = &event_osnoise;
struct ring_buffer_event *event;
struct stack_entry *entry;
@ -668,8 +663,7 @@ __timerlat_dump_stack(struct trace_buffer *buffer, struct trace_stack *fstack, u
memcpy(&entry->caller, fstack->calls, size);
entry->size = fstack->nr_entries;
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit_nostack(buffer, event);
trace_buffer_unlock_commit_nostack(buffer, event);
}
/*

8
kernel/trace/trace_sched_wakeup.c
View File

@ -378,7 +378,6 @@ tracing_sched_switch_trace(struct trace_array *tr,
struct task_struct *next,
unsigned int trace_ctx)
{
struct trace_event_call *call = &event_context_switch;
struct trace_buffer *buffer = tr->array_buffer.buffer;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
@ -396,8 +395,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->next_state = task_state_index(next);
entry->next_cpu = task_cpu(next);
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
}
static void
@ -406,7 +404,6 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
struct task_struct *curr,
unsigned int trace_ctx)
{
struct trace_event_call *call = &event_wakeup;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
struct trace_buffer *buffer = tr->array_buffer.buffer;
@ -424,8 +421,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry->next_state = task_state_index(wakee);
entry->next_cpu = task_cpu(wakee);
if (!call_filter_check_discard(call, entry, buffer, event))
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
trace_buffer_unlock_commit(tr, buffer, event, trace_ctx);
}
static void notrace