Implement capturing payload on event notifiers

[lttng-ust.git] / liblttng-ust-ctl / ustctl.c

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 69bbd21a0959c93bbd870166ca1b56b8cc34533f..b2fa8258163961c799d868c4f02f798c3e262558 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -16,8 +16,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
-#include <byteswap.h>
 #include <stdint.h>
 #include <string.h>
 #include <sys/mman.h>
@@ -27,6 +25,7 @@
 #include <lttng/ust-ctl.h>
 #include <lttng/ust-abi.h>
 #include <lttng/ust-events.h>
+#include <lttng/ust-endian.h>
 #include <usterr-signal-safe.h>
 #include <ust-comm.h>
 #include <helper.h>
@@ -136,6 +135,8 @@ int ustctl_release_object(int sock, struct lttng_ust_object_data *data)
                break;
        case LTTNG_UST_OBJECT_TYPE_EVENT:
        case LTTNG_UST_OBJECT_TYPE_CONTEXT:
+       case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP:
+       case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER:
                break;
        default:
                assert(0);
@@ -332,6 +333,37 @@ int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode,
        return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
 }
 
+int ustctl_set_capture(int sock, struct lttng_ust_capture_bytecode *bytecode,
+               struct lttng_ust_object_data *obj_data)
+{
+       struct ustcomm_ust_msg lum;
+       struct ustcomm_ust_reply lur;
+       int ret;
+
+       if (!obj_data)
+               return -EINVAL;
+
+       memset(&lum, 0, sizeof(lum));
+       lum.handle = obj_data->handle;
+       lum.cmd = LTTNG_UST_CAPTURE;
+       lum.u.capture.data_size = bytecode->len;
+       lum.u.capture.reloc_offset = bytecode->reloc_offset;
+       lum.u.capture.seqnum = bytecode->seqnum;
+
+       ret = ustcomm_send_app_msg(sock, &lum);
+       if (ret)
+               return ret;
+       /* send var len bytecode */
+       ret = ustcomm_send_unix_sock(sock, bytecode->data,
+                               bytecode->len);
+       if (ret < 0) {
+               return ret;
+       }
+       if (ret != bytecode->len)
+               return -EINVAL;
+       return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+}
+
 int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion,
                struct lttng_ust_object_data *obj_data)
 {
@@ -422,6 +454,97 @@ int ustctl_stop_session(int sock, int handle)
        return ustctl_disable(sock, &obj);
 }
 
+int ustctl_create_event_notifier_group(int sock, int pipe_fd,
+               struct lttng_ust_object_data **_event_notifier_group_data)
+{
+       struct lttng_ust_object_data *event_notifier_group_data;
+       struct ustcomm_ust_msg lum;
+       struct ustcomm_ust_reply lur;
+       ssize_t len;
+       int ret;
+
+       if (!_event_notifier_group_data)
+               return -EINVAL;
+
+       event_notifier_group_data = zmalloc(sizeof(*event_notifier_group_data));
+       if (!event_notifier_group_data)
+               return -ENOMEM;
+
+       event_notifier_group_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP;
+
+       memset(&lum, 0, sizeof(lum));
+       lum.handle = LTTNG_UST_ROOT_HANDLE;
+       lum.cmd = LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE;
+
+       ret = ustcomm_send_app_msg(sock, &lum);
+       if (ret)
+               goto error;
+
+       /* Send event_notifier notification pipe. */
+       len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1);
+       if (len <= 0) {
+               ret = len;
+               goto error;
+       }
+
+       ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+       if (ret)
+               goto error;
+
+       event_notifier_group_data->handle = lur.ret_val;
+       DBG("received event_notifier group handle %d", event_notifier_group_data->handle);
+
+       *_event_notifier_group_data = event_notifier_group_data;
+
+       ret = 0;
+       goto end;
+error:
+       free(event_notifier_group_data);
+
+end:
+       return ret;
+}
+
+int ustctl_create_event_notifier(int sock, struct lttng_ust_event_notifier *event_notifier,
+               struct lttng_ust_object_data *event_notifier_group,
+               struct lttng_ust_object_data **_event_notifier_data)
+{
+       struct ustcomm_ust_msg lum;
+       struct ustcomm_ust_reply lur;
+       struct lttng_ust_object_data *event_notifier_data;
+       int ret;
+
+       if (!event_notifier_group || !_event_notifier_data)
+               return -EINVAL;
+
+       event_notifier_data = zmalloc(sizeof(*event_notifier_data));
+       if (!event_notifier_data)
+               return -ENOMEM;
+
+       event_notifier_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER;
+
+       memset(&lum, 0, sizeof(lum));
+       lum.handle = event_notifier_group->handle;
+       lum.cmd = LTTNG_UST_EVENT_NOTIFIER_CREATE;
+
+       strncpy(lum.u.event_notifier.event.name, event_notifier->event.name,
+               LTTNG_UST_SYM_NAME_LEN);
+       lum.u.event_notifier.event.instrumentation = event_notifier->event.instrumentation;
+       lum.u.event_notifier.event.loglevel_type = event_notifier->event.loglevel_type;
+       lum.u.event_notifier.event.loglevel = event_notifier->event.loglevel;
+       lum.u.event_notifier.event.token = event_notifier->event.token;
+       ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+       if (ret) {
+               free(event_notifier_data);
+               return ret;
+       }
+       event_notifier_data->handle = lur.ret_val;
+       DBG("received event_notifier handle %u", event_notifier_data->handle);
+       *_event_notifier_data = event_notifier_data;
+
+       return ret;
+}
+
 int ustctl_tracepoint_list(int sock)
 {
        struct ustcomm_ust_msg lum;
@@ -1457,7 +1580,7 @@ int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
        chan = consumer_chan->chan->chan;
        *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
                consumer_chan->chan->handle);
-       *len = PAGE_ALIGN(*len);
+       *len = LTTNG_UST_PAGE_ALIGN(*len);
        return 0;
 }