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Subject[PATCH 12/24] perf daemon: Add stop command
Date
Add 'perf daemon stop' command to stop daemon process
and all running sessions.

Example:

# cat ~/.perfconfig
[daemon]
base=/opt/perfdata

[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a

[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a

Starting the daemon:

# perf daemon start

Stopping the daemon

# perf daemon stop

Daemon is not running, nothing to connect to:

# perf daemon
connect error: Connection refused

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/builtin-daemon.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index 7581c5f296ad..468ed2af8b3f 100644
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -491,6 +491,7 @@ static int setup_server_socket(struct daemon *daemon)
enum {
CMD_LIST = 0,
CMD_SIGNAL = 1,
+ CMD_STOP = 2,
CMD_MAX,
};

@@ -624,6 +625,10 @@ static int handle_server_socket(struct daemon *daemon, int sock_fd)
case CMD_SIGNAL:
ret = cmd_session_kill(daemon, &cmd, out);
break;
+ case CMD_STOP:
+ done = 1;
+ pr_debug("perf daemon is exciting\n");
+ break;
default:
break;
}
@@ -1093,6 +1098,27 @@ static int __cmd_signal(struct daemon *daemon, struct option parent_options[],
return send_cmd(daemon, &cmd);
}

+static int __cmd_stop(struct daemon *daemon, struct option parent_options[],
+ int argc, const char **argv)
+{
+ struct option start_options[] = {
+ OPT_PARENT(parent_options),
+ OPT_END()
+ };
+ union cmd cmd = { .cmd = CMD_STOP, };
+
+ argc = parse_options(argc, argv, start_options, daemon_usage, 0);
+ if (argc)
+ usage_with_options(daemon_usage, start_options);
+
+ if (setup_config(daemon)) {
+ pr_err("failed: config not found\n");
+ return -1;
+ }
+
+ return send_cmd(daemon, &cmd);
+}
+
int cmd_daemon(int argc, const char **argv)
{
struct option daemon_options[] = {
@@ -1117,6 +1143,8 @@ int cmd_daemon(int argc, const char **argv)
return __cmd_start(&__daemon, daemon_options, argc, argv);
if (!strcmp(argv[0], "signal"))
return __cmd_signal(&__daemon, daemon_options, argc, argv);
+ else if (!strcmp(argv[0], "stop"))
+ return __cmd_stop(&__daemon, daemon_options, argc, argv);

pr_err("failed: unknown command '%s'\n", argv[0]);
return -1;
--
2.29.2
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