Support capture for kernel tracer

[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.c

diff --git a/src/common/kernel-ctl/kernel-ctl.c b/src/common/kernel-ctl/kernel-ctl.c
index bb6602e2bffb57f676514313b462b5e8b62645e6..94e22ff0691170ad5db2f856b4bd512cd9f7e9d7 100644 (file)
--- a/src/common/kernel-ctl/kernel-ctl.c
+++ b/src/common/kernel-ctl/kernel-ctl.c
@@ -437,6 +437,28 @@ int kernctl_create_event_notifier(int group_fd,
                        LTTNG_KERNEL_EVENT_NOTIFIER_CREATE, event_notifier);
 }
 
+int kernctl_capture(int fd, const struct lttng_bytecode *capture)
+{
+       int ret;
+       struct lttng_kernel_capture_bytecode *kb;
+
+       /* Translate bytecode to kernel bytecode. */
+       kb = zmalloc(sizeof(*kb) + capture->len);
+       if (!kb) {
+               ret = -ENOMEM;
+               goto end;
+       }
+
+       kb->len = capture->len;
+       kb->reloc_offset = capture->reloc_table_offset;
+       kb->seqnum = capture->seqnum;
+       memcpy(kb->data, capture->data, capture->len);
+       ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CAPTURE, kb);
+       free(kb);
+end:
+       return ret;
+}
+
 int kernctl_filter(int fd, const struct lttng_bytecode *filter)
 {
        struct lttng_kernel_filter_bytecode *kb;