Add calibrate command

[lttng-tools.git] / ltt-sessiond / kernel-ctl.c

diff --git a/ltt-sessiond/kernel-ctl.c b/ltt-sessiond/kernel-ctl.c
index 09a3763eb835c30aaaa25fca4081f27d34aeb881..3dd146dd4b9792fe6754ef1136a49aef6b111c53 100644 (file)
--- a/ltt-sessiond/kernel-ctl.c
+++ b/ltt-sessiond/kernel-ctl.c
@@ -41,7 +41,12 @@ int kernel_add_channel_context(struct ltt_kernel_channel *chan,
        DBG("Adding context to channel %s", chan->channel->name);
        ret = kernctl_add_context(chan->fd, ctx);
        if (ret < 0) {
-               perror("add context ioctl");
+               if (errno != EEXIST) {
+                       perror("add context ioctl");
+               } else {
+                       /* If EEXIST, we just ignore the error */
+                       ret = 0;
+               }
                goto error;
        }
 
@@ -403,6 +408,23 @@ void kernel_wait_quiescent(int fd)
        }
 }
 
+/*
+ *  kernel_calibrate
+ */
+int kernel_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
+{
+       int ret;
+
+       ret = kernctl_calibrate(fd, calibrate);
+       if (ret < 0) {
+               perror("calibrate ioctl");
+               return -1;
+       }
+
+       return 0;
+}
+
+
 /*
  *  kernel_metadata_flush_buffer
  *