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tracing: Change trace_boot to use synth_event interface

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Have trace_boot_add_synth_event() use the synth_event interface.

Also, rename synth_event_run_cmd() to synth_event_run_command() now
that trace_boot's version is gone.

Link: http://lkml.kernel.org/r/94f1fa0e31846d0bddca916b8663404b20559e34.1580323897.git.zanussi@kernel.org

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2020-01-29 12:59:26 -06:00 committed by Steven Rostedt (VMware)
parent 1e837945a8
commit fdeb1aca28
2 changed files with 14 additions and 26 deletions
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31
kernel/trace/trace_boot.c
View File

@ -125,38 +125,31 @@ trace_boot_add_kprobe_event(struct xbc_node *node, const char *event)
#endif
#ifdef CONFIG_HIST_TRIGGERS
extern int synth_event_run_command(const char *command);
static int __init
trace_boot_add_synth_event(struct xbc_node *node, const char *event)
{
struct dynevent_cmd cmd;
struct xbc_node *anode;
char buf[MAX_BUF_LEN], *q;
char buf[MAX_BUF_LEN];
const char *p;
int len, delta, ret;
int ret;
len = ARRAY_SIZE(buf);
delta = snprintf(buf, len, "%s", event);
if (delta >= len) {
pr_err("Event name is too long: %s\n", event);
return -E2BIG;
}
len -= delta; q = buf + delta;
synth_event_cmd_init(&cmd, buf, MAX_BUF_LEN);
ret = synth_event_gen_cmd_start(&cmd, event, NULL);
if (ret)
return ret;
xbc_node_for_each_array_value(node, "fields", anode, p) {
delta = snprintf(q, len, " %s;", p);
if (delta >= len) {
pr_err("fields string is too long: %s\n", p);
return -E2BIG;
}
len -= delta; q += delta;
ret = synth_event_add_field_str(&cmd, p);
if (ret)
return ret;
}
ret = synth_event_run_command(buf);
ret = synth_event_gen_cmd_end(&cmd);
if (ret < 0)
pr_err("Failed to add synthetic event: %s\n", buf);
return ret;
}
#else

9
kernel/trace/trace_events_hist.c
View File

@ -1755,12 +1755,7 @@ static int create_or_delete_synth_event(int argc, char **argv)
return ret == -ECANCELED ? -EINVAL : ret;
}
int synth_event_run_command(const char *command)
{
return trace_run_command(command, create_or_delete_synth_event);
}
static int synth_event_run_cmd(struct dynevent_cmd *cmd)
static int synth_event_run_command(struct dynevent_cmd *cmd)
{
struct synth_event *se;
int ret;
@ -1790,7 +1785,7 @@ static int synth_event_run_cmd(struct dynevent_cmd *cmd)
void synth_event_cmd_init(struct dynevent_cmd *cmd, char *buf, int maxlen)
{
dynevent_cmd_init(cmd, buf, maxlen, DYNEVENT_TYPE_SYNTH,
synth_event_run_cmd);
synth_event_run_command);
}
EXPORT_SYMBOL_GPL(synth_event_cmd_init);