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tracing: make the set_event and available_events subsystem aware
This patch makes the event files, set_event and available_events aware of the subsystem. Now you can enable an entire subsystem with: echo 'irq:*' > set_event Note: the '*' is not needed. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
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parent
6ecc2d1ca3
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@ -12,6 +12,8 @@
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#include "trace_events.h"
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#include "trace_events.h"
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#define TRACE_SYSTEM "TRACE_SYSTEM"
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#define events_for_each(event) \
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#define events_for_each(event) \
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for (event = __start_ftrace_events; \
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for (event = __start_ftrace_events; \
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(unsigned long)event < (unsigned long)__stop_ftrace_events; \
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(unsigned long)event < (unsigned long)__stop_ftrace_events; \
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@ -45,14 +47,47 @@ static void ftrace_clear_events(void)
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static int ftrace_set_clr_event(char *buf, int set)
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static int ftrace_set_clr_event(char *buf, int set)
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{
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{
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struct ftrace_event_call *call = __start_ftrace_events;
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struct ftrace_event_call *call = __start_ftrace_events;
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char *event = NULL, *sub = NULL, *match;
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int ret = -EINVAL;
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/*
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* The buf format can be <subsystem>:<event-name>
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* *:<event-name> means any event by that name.
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* :<event-name> is the same.
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*
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* <subsystem>:* means all events in that subsystem
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* <subsystem>: means the same.
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*
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* <name> (no ':') means all events in a subsystem with
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* the name <name> or any event that matches <name>
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*/
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match = strsep(&buf, ":");
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if (buf) {
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sub = match;
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event = buf;
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match = NULL;
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if (!strlen(sub) || strcmp(sub, "*") == 0)
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sub = NULL;
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if (!strlen(event) || strcmp(event, "*") == 0)
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event = NULL;
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}
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events_for_each(call) {
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events_for_each(call) {
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if (!call->name)
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if (!call->name)
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continue;
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continue;
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if (strcmp(buf, call->name) != 0)
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if (match &&
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strcmp(match, call->name) != 0 &&
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strcmp(match, call->system) != 0)
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continue;
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if (sub && strcmp(sub, call->system) != 0)
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continue;
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if (event && strcmp(event, call->name) != 0)
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continue;
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continue;
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if (set) {
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if (set) {
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@ -68,9 +103,9 @@ static int ftrace_set_clr_event(char *buf, int set)
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call->enabled = 0;
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call->enabled = 0;
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call->unregfunc();
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call->unregfunc();
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}
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}
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return 0;
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ret = 0;
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}
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}
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return -EINVAL;
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return ret;
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}
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}
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/* 128 should be much more than enough */
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/* 128 should be much more than enough */
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@ -200,6 +235,8 @@ static int t_show(struct seq_file *m, void *v)
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{
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{
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struct ftrace_event_call *call = v;
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struct ftrace_event_call *call = v;
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if (strcmp(call->system, TRACE_SYSTEM) != 0)
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seq_printf(m, "%s:", call->system);
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seq_printf(m, "%s\n", call->name);
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seq_printf(m, "%s\n", call->name);
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return 0;
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return 0;
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