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Open Source and information security mailing list archives
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Date: Wed, 28 Aug 2013 14:00:33 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Tom Zanussi <tom.zanussi@...ux.intel.com>
Cc: masami.hiramatsu.pt@...achi.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 08/10] tracing: update event filters for multibuffer
On Tue, 27 Aug 2013 14:40:20 -0500
Tom Zanussi <tom.zanussi@...ux.intel.com> wrote:
> extern int filter_current_check_discard(struct ring_buffer *buffer,
> @@ -336,6 +350,20 @@ extern enum event_trigger_type event_triggers_call(struct ftrace_event_file *fil
> extern void event_triggers_post_call(struct ftrace_event_file *file,
> enum event_trigger_type tt);
>
> +static inline int
> +filter_check_discard(struct ftrace_event_file *file, void *rec,
> + struct ring_buffer *buffer,
> + struct ring_buffer_event *event)
> +{
> + if (unlikely(file->flags & FTRACE_EVENT_FL_FILTERED) &&
> + !filter_match_preds(file->filter, rec)) {
> + ring_buffer_discard_commit(buffer, event);
> + return 1;
> + }
> +
> + return 0;
> +}
> +
Keep this as a function, don't make it inlined. Note, anything
added to ftrace_raw_event_##call increases the kernel by quite a bit.
We have almost a 1000 tracepoints, which means we have 1000 versions of
this function. If anything, we need to remove code from it, not add to
it.
> enum {
> FILTER_OTHER = 0,
> FILTER_STATIC_STRING,
> diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
> index 6c701c3..0de03fd 100644
> --- a/include/trace/ftrace.h
> +++ b/include/trace/ftrace.h
> @@ -446,8 +446,7 @@ static inline notrace int ftrace_get_offsets_##call( \
> * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
> * &ftrace_file->flags))
> * ring_buffer_discard_commit(buffer, event);
> - * else if (!filter_current_check_discard(buffer, event_call,
> - * entry, event))
> + * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
> * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
> *
> * if (__tt)
> @@ -568,8 +567,7 @@ ftrace_raw_event_##call(void *__data, proto) \
> if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, \
> &ftrace_file->flags)) \
> ring_buffer_discard_commit(buffer, event); \
> - else if (!filter_current_check_discard(buffer, event_call, \
> - entry, event)) \
> + else if (!filter_check_discard(ftrace_file, entry, buffer, event)) \
> trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \
> \
> if (__tt) \
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 5a61dbe..2aabd34 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -235,14 +235,6 @@ void trace_array_put(struct trace_array *this_tr)
> mutex_unlock(&trace_types_lock);
> }
>
> -int filter_current_check_discard(struct ring_buffer *buffer,
> - struct ftrace_event_call *call, void *rec,
> - struct ring_buffer_event *event)
> -{
> - return filter_check_discard(call, rec, buffer, event);
> -}
> -EXPORT_SYMBOL_GPL(filter_current_check_discard);
> -
> cycle_t buffer_ftrace_now(struct trace_buffer *buf, int cpu)
> {
> u64 ts;
> @@ -1630,7 +1622,7 @@ trace_function(struct trace_array *tr,
> entry->ip = ip;
> entry->parent_ip = parent_ip;
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
> }
>
> @@ -1714,7 +1706,7 @@ static void __ftrace_trace_stack(struct ring_buffer *buffer,
>
> entry->size = trace.nr_entries;
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
>
> out:
> @@ -1816,7 +1808,7 @@ ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
> trace.entries = entry->caller;
>
> save_stack_trace_user(&trace);
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
>
> out_drop_count:
> @@ -2008,7 +2000,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
> entry->fmt = fmt;
>
> memcpy(entry->buf, tbuffer, sizeof(u32) * len);
> - if (!filter_check_discard(call, entry, buffer, event)) {
> + if (!call_filter_check_discard(call, entry, buffer, event)) {
> __buffer_unlock_commit(buffer, event);
> ftrace_trace_stack(buffer, flags, 6, pc);
> }
> @@ -2063,7 +2055,7 @@ __trace_array_vprintk(struct ring_buffer *buffer,
>
> memcpy(&entry->buf, tbuffer, len);
> entry->buf[len] = '\0';
> - if (!filter_check_discard(call, entry, buffer, event)) {
> + if (!call_filter_check_discard(call, entry, buffer, event)) {
> __buffer_unlock_commit(buffer, event);
> ftrace_trace_stack(buffer, flags, 6, pc);
> }
> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
> index af5f3b6..a588ca8 100644
> --- a/kernel/trace/trace.h
> +++ b/kernel/trace/trace.h
> @@ -985,9 +985,9 @@ struct filter_pred {
>
> extern enum regex_type
> filter_parse_regex(char *buff, int len, char **search, int *not);
> -extern void print_event_filter(struct ftrace_event_call *call,
> +extern void print_event_filter(struct ftrace_event_file *file,
> struct trace_seq *s);
> -extern int apply_event_filter(struct ftrace_event_call *call,
> +extern int apply_event_filter(struct ftrace_event_file *file,
> char *filter_string);
> extern int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir,
> char *filter_string);
> @@ -1003,9 +1003,9 @@ struct ftrace_event_field *
> trace_find_event_field(struct ftrace_event_call *call, char *name);
>
> static inline int
> -filter_check_discard(struct ftrace_event_call *call, void *rec,
> - struct ring_buffer *buffer,
> - struct ring_buffer_event *event)
> +call_filter_check_discard(struct ftrace_event_call *call, void *rec,
> + struct ring_buffer *buffer,
> + struct ring_buffer_event *event)
> {
> if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
> !filter_match_preds(call->filter, rec)) {
> diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
> index d594da0..697fb9b 100644
> --- a/kernel/trace/trace_branch.c
> +++ b/kernel/trace/trace_branch.c
> @@ -78,7 +78,7 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect)
> entry->line = f->line;
> entry->correct = val == expect;
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
>
> out:
> diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
> index 25b2c86..7dacbd1 100644
> --- a/kernel/trace/trace_events.c
> +++ b/kernel/trace/trace_events.c
> @@ -990,7 +990,7 @@ static ssize_t
> event_filter_read(struct file *filp, char __user *ubuf, size_t cnt,
> loff_t *ppos)
> {
> - struct ftrace_event_call *call;
> + struct ftrace_event_file *file;
> struct trace_seq *s;
> int r = -ENODEV;
>
> @@ -1005,12 +1005,12 @@ event_filter_read(struct file *filp, char __user *ubuf, size_t cnt,
> trace_seq_init(s);
>
> mutex_lock(&event_mutex);
> - call = event_file_data(filp);
> - if (call)
> - print_event_filter(call, s);
> + file = event_file_data(filp);
> + if (file)
> + print_event_filter(file, s);
> mutex_unlock(&event_mutex);
>
> - if (call)
> + if (file)
> r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
>
> kfree(s);
> @@ -1022,7 +1022,7 @@ static ssize_t
> event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
> loff_t *ppos)
> {
> - struct ftrace_event_call *call;
> + struct ftrace_event_file *file;
> char *buf;
> int err = -ENODEV;
>
> @@ -1040,9 +1040,9 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
> buf[cnt] = '\0';
>
> mutex_lock(&event_mutex);
> - call = event_file_data(filp);
> - if (call)
> - err = apply_event_filter(call, buf);
> + file = event_file_data(filp);
> + if (file)
> + err = apply_event_filter(file, buf);
> mutex_unlock(&event_mutex);
>
> free_page((unsigned long) buf);
> @@ -1540,7 +1540,7 @@ event_create_dir(struct dentry *parent, struct ftrace_event_file *file)
> return -1;
> }
> }
> - trace_create_file("filter", 0644, file->dir, call,
> + trace_create_file("filter", 0644, file->dir, file,
> &ftrace_event_filter_fops);
>
> trace_create_file("trigger", 0644, file->dir, file,
> @@ -1581,6 +1581,10 @@ static void event_remove(struct ftrace_event_call *call)
> if (file->event_call != call)
> continue;
> ftrace_event_enable_disable(file, 0);
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER)
> + destroy_call_preds(call);
> + else
> + destroy_preds(file);
Why not just use destroy_preds(file), and then do the check inside that
call. Instead of open coding that check all over the place.
Have both a destroy_file_preds() and destroy_call_preds() and have:
destroy_preds()
{
call = file->call;
if (call & TRACE_EVENT_FL_USE_CALL_FILTER)
destroy_call_preds(call);
else
destroy_file_preds(file);
}
?
}
> /*
> * The do_for_each_event_file() is
> * a double loop. After finding the call for this
> @@ -1706,7 +1710,7 @@ static void __trace_remove_event_call(struct ftrace_event_call *call)
> {
> event_remove(call);
> trace_destroy_fields(call);
> - destroy_preds(call);
> + destroy_call_preds(call);
> }
>
> static int probe_remove_event_call(struct ftrace_event_call *call)
> diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
> index 0c45aa1..af55a84 100644
> --- a/kernel/trace/trace_events_filter.c
> +++ b/kernel/trace/trace_events_filter.c
> @@ -638,9 +638,14 @@ static void append_filter_err(struct filter_parse_state *ps,
> }
>
> /* caller must hold event_mutex */
> -void print_event_filter(struct ftrace_event_call *call, struct trace_seq *s)
> +void print_event_filter(struct ftrace_event_file *file, struct trace_seq *s)
> {
> - struct event_filter *filter = call->filter;
> + struct event_filter *filter;
> +
> + if (file->event_call->flags & TRACE_EVENT_FL_USE_CALL_FILTER)
> + filter = file->event_call->filter;
> + else
> + filter = file->filter;
>
> if (filter && filter->filter_string)
> trace_seq_printf(s, "%s\n", filter->filter_string);
> @@ -766,7 +771,12 @@ static void __free_preds(struct event_filter *filter)
> filter->n_preds = 0;
> }
>
> -static void filter_disable(struct ftrace_event_call *call)
> +static void filter_disable(struct ftrace_event_file *file)
> +{
> + file->flags &= ~FTRACE_EVENT_FL_FILTERED;
> +}
> +
> +static void call_filter_disable(struct ftrace_event_call *call)
> {
> call->flags &= ~TRACE_EVENT_FL_FILTERED;
> }
> @@ -787,12 +797,24 @@ void free_event_filter(struct event_filter *filter)
> }
>
> /*
> + * Called when destroying the ftrace_event_file.
> + * The file is being freed, so we do not need to worry about
> + * the file being currently used. This is for module code removing
> + * the tracepoints from within it.
> + */
> +void destroy_preds(struct ftrace_event_file *file)
> +{
> + __free_filter(file->filter);
> + file->filter = NULL;
> +}
> +
> +/*
> * Called when destroying the ftrace_event_call.
> * The call is being freed, so we do not need to worry about
> * the call being currently used. This is for module code removing
> * the tracepoints from within it.
> */
> -void destroy_preds(struct ftrace_event_call *call)
> +void destroy_call_preds(struct ftrace_event_call *call)
> {
> __free_filter(call->filter);
> call->filter = NULL;
> @@ -830,28 +852,44 @@ static int __alloc_preds(struct event_filter *filter, int n_preds)
> return 0;
> }
>
> -static void filter_free_subsystem_preds(struct event_subsystem *system)
> +static void filter_free_subsystem_preds(struct event_subsystem *system,
> + struct trace_array *tr)
> {
> + struct ftrace_event_file *file;
> struct ftrace_event_call *call;
>
> - list_for_each_entry(call, &ftrace_events, list) {
> + list_for_each_entry(file, &tr->events, list) {
> + call = file->event_call;
> if (strcmp(call->class->system, system->name) != 0)
> continue;
>
> - filter_disable(call);
> - remove_filter_string(call->filter);
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER) {
> + call_filter_disable(call);
> + remove_filter_string(call->filter);
> + } else {
> + filter_disable(file);
> + remove_filter_string(file->filter);
> + }
> }
> }
>
> -static void filter_free_subsystem_filters(struct event_subsystem *system)
> +static void filter_free_subsystem_filters(struct event_subsystem *system,
> + struct trace_array *tr)
> {
> + struct ftrace_event_file *file;
> struct ftrace_event_call *call;
>
> - list_for_each_entry(call, &ftrace_events, list) {
> + list_for_each_entry(file, &tr->events, list) {
> + call = file->event_call;
> if (strcmp(call->class->system, system->name) != 0)
> continue;
> - __free_filter(call->filter);
> - call->filter = NULL;
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER) {
> + __free_filter(call->filter);
> + call->filter = NULL;
> + } else {
> + __free_filter(file->filter);
> + file->filter = NULL;
> + }
I'm thinking it will be cleaner to encapsulate all of these into
functions like:
static inline void __event_free_filter(file)
{
call = file->event_call;
if (call->flags ...) {
__free_filter(call->filter);
call->filter = NULL;
} else {
__free_filter(file->filter);
file->filter = NULL;
}
}
That way, we get the ugly flag check contained, and not spread out in
open coded functions.
> }
> }
>
> @@ -1628,9 +1666,11 @@ struct filter_list {
> };
>
> static int replace_system_preds(struct event_subsystem *system,
> + struct trace_array *tr,
> struct filter_parse_state *ps,
> char *filter_string)
> {
> + struct ftrace_event_file *file;
> struct ftrace_event_call *call;
> struct filter_list *filter_item;
> struct filter_list *tmp;
> @@ -1638,8 +1678,8 @@ static int replace_system_preds(struct event_subsystem *system,
> bool fail = true;
> int err;
>
> - list_for_each_entry(call, &ftrace_events, list) {
> -
> + list_for_each_entry(file, &tr->events, list) {
> + call = file->event_call;
> if (strcmp(call->class->system, system->name) != 0)
> continue;
>
> @@ -1648,21 +1688,34 @@ static int replace_system_preds(struct event_subsystem *system,
> * (filter arg is ignored on dry_run)
> */
> err = replace_preds(call, NULL, ps, filter_string, true);
> - if (err)
> - call->flags |= TRACE_EVENT_FL_NO_SET_FILTER;
> - else
> - call->flags &= ~TRACE_EVENT_FL_NO_SET_FILTER;
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER) {
> + if (err)
> + call->flags |= TRACE_EVENT_FL_NO_SET_FILTER;
> + else
> + call->flags &= ~TRACE_EVENT_FL_NO_SET_FILTER;
> + } else {
> + if (err)
> + file->flags |= FTRACE_EVENT_FL_NO_SET_FILTER;
> + else
> + file->flags &= ~FTRACE_EVENT_FL_NO_SET_FILTER;
> + }
ditto
> }
>
> - list_for_each_entry(call, &ftrace_events, list) {
> + list_for_each_entry(file, &tr->events, list) {
> struct event_filter *filter;
>
> + call = file->event_call;
> +
> if (strcmp(call->class->system, system->name) != 0)
> continue;
>
> - if (call->flags & TRACE_EVENT_FL_NO_SET_FILTER)
> + if (file->flags & FTRACE_EVENT_FL_NO_SET_FILTER)
> continue;
>
> + if ((call->flags & TRACE_EVENT_FL_USE_CALL_FILTER) &&
> + (call->flags & TRACE_EVENT_FL_NO_SET_FILTER))
> + continue;
> +
> filter_item = kzalloc(sizeof(*filter_item), GFP_KERNEL);
> if (!filter_item)
> goto fail_mem;
> @@ -1681,17 +1734,29 @@ static int replace_system_preds(struct event_subsystem *system,
>
> err = replace_preds(call, filter, ps, filter_string, false);
> if (err) {
> - filter_disable(call);
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER)
> + call_filter_disable(call);
> + else
> + filter_disable(file);
> parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0);
> append_filter_err(ps, filter);
> - } else
> - call->flags |= TRACE_EVENT_FL_FILTERED;
> + } else {
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER)
> + call->flags |= TRACE_EVENT_FL_FILTERED;
> + else
> + file->flags |= FTRACE_EVENT_FL_FILTERED;
We can have a event_set_filter_flag(file) that does this check?
> + }
> /*
> * Regardless of if this returned an error, we still
> * replace the filter for the call.
> */
> - filter = call->filter;
> - rcu_assign_pointer(call->filter, filter_item->filter);
> + if (call->flags & TRACE_EVENT_FL_USE_CALL_FILTER) {
> + filter = call->filter;
> + rcu_assign_pointer(call->filter, filter_item->filter);
> + } else {
> + filter = file->filter;
> + rcu_assign_pointer(file->filter, filter_item->filter);
> + }
Again, encapsulate.
> filter_item->filter = filter;
>
> fail = false;
> @@ -1829,6 +1894,7 @@ int create_event_filter(struct ftrace_event_call *call,
> * and always remembers @filter_str.
> */
> static int create_system_filter(struct event_subsystem *system,
> + struct trace_array *tr,
> char *filter_str, struct event_filter **filterp)
> {
> struct event_filter *filter = NULL;
> @@ -1837,7 +1903,7 @@ static int create_system_filter(struct event_subsystem *system,
>
> err = create_filter_start(filter_str, true, &ps, &filter);
> if (!err) {
> - err = replace_system_preds(system, ps, filter_str);
> + err = replace_system_preds(system, tr, ps, filter_str);
> if (!err) {
> /* System filters just show a default message */
> kfree(filter->filter_string);
> @@ -1853,17 +1919,29 @@ static int create_system_filter(struct event_subsystem *system,
> }
>
> /* caller must hold event_mutex */
> -int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
> +int apply_event_filter(struct ftrace_event_file *file, char *filter_string)
> {
> + struct ftrace_event_call *call = file->event_call;
> struct event_filter *filter;
> + bool use_call_filter;
> int err;
>
> + use_call_filter = call->flags & TRACE_EVENT_FL_USE_CALL_FILTER;
> +
> if (!strcmp(strstrip(filter_string), "0")) {
> - filter_disable(call);
> - filter = call->filter;
> + if (use_call_filter) {
> + call_filter_disable(call);
> + filter = call->filter;
> + } else {
> + filter_disable(file);
> + filter = file->filter;
> + }
> if (!filter)
> return 0;
> - RCU_INIT_POINTER(call->filter, NULL);
> + if (use_call_filter)
> + RCU_INIT_POINTER(call->filter, NULL);
> + else
> + RCU_INIT_POINTER(file->filter, NULL);
Again encapsulate. Hopefully gcc will store the result.
Try to keep that check out as much as possible, including places that I
may have missed in this email.
-- Steve
> /* Make sure the filter is not being used */
> synchronize_sched();
> __free_filter(filter);
> @@ -1879,14 +1957,25 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
> * string
> */
> if (filter) {
> - struct event_filter *tmp = call->filter;
> + struct event_filter *tmp;
>
> - if (!err)
> - call->flags |= TRACE_EVENT_FL_FILTERED;
> - else
> - filter_disable(call);
> + if (use_call_filter) {
> + tmp = call->filter;
> + if (!err)
> + call->flags |= TRACE_EVENT_FL_FILTERED;
> + else
> + call_filter_disable(call);
> +
> + rcu_assign_pointer(call->filter, filter);
> + } else {
> + tmp = file->filter;
> + if (!err)
> + file->flags |= FTRACE_EVENT_FL_FILTERED;
> + else
> + filter_disable(file);
>
> - rcu_assign_pointer(call->filter, filter);
> + rcu_assign_pointer(file->filter, filter);
> + }
>
> if (tmp) {
> /* Make sure the call is done with the filter */
> @@ -1902,6 +1991,7 @@ int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir,
> char *filter_string)
> {
> struct event_subsystem *system = dir->subsystem;
> + struct trace_array *tr = dir->tr;
> struct event_filter *filter;
> int err = 0;
>
> @@ -1914,18 +2004,18 @@ int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir,
> }
>
> if (!strcmp(strstrip(filter_string), "0")) {
> - filter_free_subsystem_preds(system);
> + filter_free_subsystem_preds(system, tr);
> remove_filter_string(system->filter);
> filter = system->filter;
> system->filter = NULL;
> /* Ensure all filters are no longer used */
> synchronize_sched();
> - filter_free_subsystem_filters(system);
> + filter_free_subsystem_filters(system, tr);
> __free_filter(filter);
> goto out_unlock;
> }
>
> - err = create_system_filter(system, filter_string, &filter);
> + err = create_system_filter(system, tr, filter_string, &filter);
> if (filter) {
> /*
> * No event actually uses the system filter
> diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
> index d21a746..7c3e3e7 100644
> --- a/kernel/trace/trace_export.c
> +++ b/kernel/trace/trace_export.c
> @@ -180,7 +180,7 @@ struct ftrace_event_call __used event_##call = { \
> .event.type = etype, \
> .class = &event_class_ftrace_##call, \
> .print_fmt = print, \
> - .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
> + .flags = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \
> }; \
> struct ftrace_event_call __used \
> __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
> diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
> index b5c0924..7d2fcd7 100644
> --- a/kernel/trace/trace_functions_graph.c
> +++ b/kernel/trace/trace_functions_graph.c
> @@ -230,7 +230,7 @@ int __trace_graph_entry(struct trace_array *tr,
> return 0;
> entry = ring_buffer_event_data(event);
> entry->graph_ent = *trace;
> - if (!filter_current_check_discard(buffer, call, entry, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
>
> return 1;
> @@ -335,7 +335,7 @@ void __trace_graph_return(struct trace_array *tr,
> return;
> entry = ring_buffer_event_data(event);
> entry->ret = *trace;
> - if (!filter_current_check_discard(buffer, call, entry, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> __buffer_unlock_commit(buffer, event);
> }
>
> diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
> index 243f683..dae9541 100644
> --- a/kernel/trace/trace_kprobe.c
> +++ b/kernel/trace/trace_kprobe.c
> @@ -835,7 +835,7 @@ __kprobe_trace_func(struct trace_probe *tp, struct pt_regs *regs,
> entry->ip = (unsigned long)tp->rp.kp.addr;
> store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
>
> - if (!filter_current_check_discard(buffer, call, entry, event))
> + if (!filter_check_discard(ftrace_file, entry, buffer, event))
> trace_buffer_unlock_commit_regs(buffer, event,
> irq_flags, pc, regs);
> }
> @@ -884,7 +884,7 @@ __kretprobe_trace_func(struct trace_probe *tp, struct kretprobe_instance *ri,
> entry->ret_ip = (unsigned long)ri->ret_addr;
> store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
>
> - if (!filter_current_check_discard(buffer, call, entry, event))
> + if (!filter_check_discard(ftrace_file, entry, buffer, event))
> trace_buffer_unlock_commit_regs(buffer, event,
> irq_flags, pc, regs);
> }
> diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
> index b3dcfb2..0abd9b8 100644
> --- a/kernel/trace/trace_mmiotrace.c
> +++ b/kernel/trace/trace_mmiotrace.c
> @@ -323,7 +323,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
> entry = ring_buffer_event_data(event);
> entry->rw = *rw;
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> trace_buffer_unlock_commit(buffer, event, 0, pc);
> }
>
> @@ -353,7 +353,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
> entry = ring_buffer_event_data(event);
> entry->map = *map;
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> trace_buffer_unlock_commit(buffer, event, 0, pc);
> }
>
> diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
> index 4e98e3b..3f34dc9 100644
> --- a/kernel/trace/trace_sched_switch.c
> +++ b/kernel/trace/trace_sched_switch.c
> @@ -45,7 +45,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
> entry->next_state = next->state;
> entry->next_cpu = task_cpu(next);
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> trace_buffer_unlock_commit(buffer, event, flags, pc);
> }
>
> @@ -101,7 +101,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
> entry->next_state = wakee->state;
> entry->next_cpu = task_cpu(wakee);
>
> - if (!filter_check_discard(call, entry, buffer, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> trace_buffer_unlock_commit(buffer, event, flags, pc);
> }
>
> diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
> index 84cdbce..655bcf8 100644
> --- a/kernel/trace/trace_syscalls.c
> +++ b/kernel/trace/trace_syscalls.c
> @@ -326,11 +326,9 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id)
> (FTRACE_EVENT_FL_SOFT_DISABLED | FTRACE_EVENT_FL_TRIGGER_MODE)) ==
> FTRACE_EVENT_FL_SOFT_DISABLED)
> return;
> -
> sys_data = syscall_nr_to_meta(syscall_nr);
> if (!sys_data)
> return;
> -
> size = sizeof(*entry) + sizeof(unsigned long) * sys_data->nb_args;
>
> local_save_flags(irq_flags);
> @@ -351,8 +349,7 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id)
>
> if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
> ring_buffer_discard_commit(buffer, event);
> - else if (!filter_current_check_discard(buffer, sys_data->enter_event,
> - entry, event))
> + else if (!filter_check_discard(ftrace_file, entry, buffer, event))
> trace_current_buffer_unlock_commit(buffer, event,
> irq_flags, pc);
> if (__tt)
> @@ -409,8 +406,7 @@ static void ftrace_syscall_exit(void *data, struct pt_regs *regs, long ret)
>
> if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
> ring_buffer_discard_commit(buffer, event);
> - else if (!filter_current_check_discard(buffer, sys_data->exit_event,
> - entry, event))
> + else if (!filter_check_discard(ftrace_file, entry, buffer, event))
> trace_current_buffer_unlock_commit(buffer, event,
> irq_flags, pc);
> if (__tt)
> diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
> index 272261b..b6dcc42 100644
> --- a/kernel/trace/trace_uprobe.c
> +++ b/kernel/trace/trace_uprobe.c
> @@ -128,6 +128,7 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret)
> if (is_ret)
> tu->consumer.ret_handler = uretprobe_dispatcher;
> init_trace_uprobe_filter(&tu->filter);
> + tu->call.flags |= TRACE_EVENT_FL_USE_CALL_FILTER;
> return tu;
>
> error:
> @@ -561,7 +562,7 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
> for (i = 0; i < tu->nr_args; i++)
> call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset);
>
> - if (!filter_current_check_discard(buffer, call, entry, event))
> + if (!call_filter_check_discard(call, entry, buffer, event))
> trace_buffer_unlock_commit(buffer, event, 0, 0);
> }
>
--
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