[PATCH v4 09/10] perf record: implement control commands handling

[Alexey Budankov]

Implement handling of 'enable' and 'disable' control commands
coming from control file descriptor.

Signed-off-by: Alexey Budankov <alexey.budan...@linux.intel.com>
---
 tools/perf/builtin-record.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 8c3ec29e7e80..1ff3b7a77283 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1526,6 +1526,7 @@ static int __cmd_record(struct record *rec, int argc, 
const char **argv)
        bool disabled = false, draining = false;
        int fd;
        float ratio = 0;
+       enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
 
        atexit(record__sig_exit);
        signal(SIGCHLD, sig_handler);
@@ -1842,6 +1843,21 @@ static int __cmd_record(struct record *rec, int argc, 
const char **argv)
                                alarm(rec->switch_output.time);
                }
 
+               if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) {
+                       switch (cmd) {
+                       case EVLIST_CTL_CMD_ENABLE:
+                               pr_info(EVLIST_ENABLED_MSG);
+                               break;
+                       case EVLIST_CTL_CMD_DISABLE:
+                               pr_info(EVLIST_DISABLED_MSG);
+                               break;
+                       case EVLIST_CTL_CMD_ACK:
+                       case EVLIST_CTL_CMD_UNSUPPORTED:
+                       default:
+                               break;
+                       }
+               }
+
                if (hits == rec->samples) {
                        if (done || draining)
                                break;
-- 
2.24.1