X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=ltt-sessiond%2Fcontext.c;fp=ltt-sessiond%2Fcontext.c;h=c7765c0e851056a329a97594164e8815ca5409ec;hp=35cb50b7b0c8cde13b8ee1c56bdec2341033e41e;hb=2bdd86d4c47902237c691d3c5409f32f205df81e;hpb=f2fc6720dff91c4076318acff69aa3bb5e70060a

diff --git a/ltt-sessiond/context.c b/ltt-sessiond/context.c
index 35cb50b7b..c7765c0e8 100644
--- a/ltt-sessiond/context.c
+++ b/ltt-sessiond/context.c
@@ -25,6 +25,14 @@
 #include <lttng-sessiond-comm.h>
 #include <lttngerr.h>
 
+#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
+#include <ust/lttng-ust-ctl.h>
+#include <ust/lttng-ust-abi.h>
+#else
+#include "lttng-ust-ctl.h"
+#include "lttng-ust-abi.h"
+#endif
+
 #include "context.h"
 #include "kernel-ctl.h"
 
@@ -191,3 +199,174 @@ int context_kernel_add(struct ltt_kernel_session *ksession,
 error:
 	return ret;
 }
+
+/*
+ * UST support.
+ */
+
+/*
+ * Add UST context to an event of a specific channel.
+ */
+static int add_ustctx_to_event(struct ltt_ust_session *ustsession,
+		struct lttng_ust_context *ustctx,
+		struct ltt_ust_channel *ustchan, char *event_name)
+{
+	int ret, found = 0;
+	struct ltt_ust_event *ustevent;
+	struct object_data *context_data;	/* FIXME: currently a memleak */
+
+	DBG("Add UST context to event %s", event_name);
+
+	ustevent = trace_ust_get_event_by_name(event_name, ustchan);
+	if (ustevent != NULL) {
+		ret = ustctl_add_context(ustsession->sock, ustctx,
+			ustevent->obj, &context_data);
+		if (ret < 0) {
+			goto error;
+		}
+		found = 1;
+	}
+
+	ret = found;
+
+error:
+	return ret;
+}
+
+/*
+ * Add UST context to all channel.
+ *
+ * If event_name is specified, add context to event instead.
+ */
+static int add_ustctx_all_channels(struct ltt_ust_session *ustsession,
+		struct lttng_ust_context *ustctx, char *event_name)
+{
+	int ret, no_event = 0, found = 0;
+	struct ltt_ust_channel *ustchan;
+	struct object_data *context_data;	/* FIXME: currently a memleak */
+
+	if (strlen(event_name) == 0) {
+		no_event = 1;
+	}
+
+	DBG("Adding ust context to all channels (event: %s)", event_name);
+
+	/* Go over all channels */
+	cds_list_for_each_entry(ustchan, &ustsession->channels.head, list) {
+		if (no_event) {
+			ret = ustctl_add_context(ustsession->sock,
+				ustctx, ustchan->obj, &context_data);
+			if (ret < 0) {
+				ret = LTTCOMM_UST_CONTEXT_FAIL;
+				goto error;
+			}
+		} else {
+			ret = add_ustctx_to_event(ustsession, ustctx, ustchan, event_name);
+			if (ret < 0) {
+				ret = LTTCOMM_UST_CONTEXT_FAIL;
+				goto error;
+			} else if (ret == 1) {
+				/* Event found and context added */
+				found = 1;
+				break;
+			}
+		}
+	}
+
+	if (!found && !no_event) {
+		ret = LTTCOMM_NO_EVENT;
+		goto error;
+	}
+
+	ret = LTTCOMM_OK;
+
+error:
+	return ret;
+}
+
+/*
+ * Add UST context to a specific channel.
+ *
+ * If event_name is specified, add context to that event.
+ */
+static int add_ustctx_to_channel(struct ltt_ust_session *ustsession,
+		struct lttng_ust_context *ustctx,
+		struct ltt_ust_channel *ustchan, char *event_name)
+{
+	int ret, no_event = 0, found = 0;
+	struct object_data *context_data;	/* FIXME: currently a memleak */
+
+	if (strlen(event_name) == 0) {
+		no_event = 1;
+	}
+
+	DBG("Add UST context to channel '%s', event '%s'",
+			ustchan->name, event_name);
+
+	if (no_event) {
+		ret = ustctl_add_context(ustsession->sock, ustctx,
+			ustchan->obj, &context_data);
+		if (ret < 0) {
+			ret = LTTCOMM_UST_CONTEXT_FAIL;
+			goto error;
+		}
+	} else {
+		ret = add_ustctx_to_event(ustsession, ustctx, ustchan, event_name);
+		if (ret < 0) {
+			ret = LTTCOMM_UST_CONTEXT_FAIL;
+			goto error;
+		} else if (ret == 1) {
+			/* Event found and context added */
+			found = 1;
+		}
+	}
+
+	if (!found && !no_event) {
+		ret = LTTCOMM_NO_EVENT;
+		goto error;
+	}
+
+	ret = LTTCOMM_OK;
+
+error:
+	return ret;
+}
+
+/*
+ * Add UST context to tracer.
+ */
+int context_ust_add(struct ltt_ust_session *ustsession,
+		struct lttng_event_context *ctx, char *event_name,
+		char *channel_name)
+{
+	int ret;
+	struct ltt_ust_channel *ustchan;
+	struct lttng_ust_context ustctx;
+
+	/* Setup UST context structure */
+	ustctx.ctx = ctx->ctx;
+
+	if (strlen(channel_name) == 0) {
+		ret = add_ustctx_all_channels(ustsession, &ustctx, event_name);
+		if (ret != LTTCOMM_OK) {
+			goto error;
+		}
+	} else {
+		/* Get UST channel */
+		ustchan = trace_ust_get_channel_by_name(channel_name, ustsession);
+		if (ustchan == NULL) {
+			ret = LTTCOMM_UST_CHAN_NOT_FOUND;
+			goto error;
+		}
+
+		ret = add_ustctx_to_channel(ustsession, &ustctx, ustchan, event_name);
+		if (ret != LTTCOMM_OK) {
+			goto error;
+		}
+	}
+
+	ret = LTTCOMM_OK;
+
+error:
+	return ret;
+}