Implement kernel filter support

[lttng-tools.git] / src / bin / lttng-sessiond / cmd.c

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index 7eea28121e3e55394c67fc96ad484d4574b5f4da..95e371d7b66fe527da607a7c60d0c49b871a2e63 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -1485,18 +1485,48 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain,
                switch (event->type) {
                case LTTNG_EVENT_ALL:
                {
+                       char *filter_expression_a = NULL;
+                       struct lttng_filter_bytecode *filter_a = NULL;
+
+                       /*
+                        * We need to duplicate filter_expression and filter,
+                        * because ownership is passed to first enable
+                        * event.
+                        */
+                       if (filter_expression) {
+                               filter_expression_a = strdup(filter_expression);
+                               if (!filter_expression_a) {
+                                       ret = LTTNG_ERR_FATAL;
+                                       goto error;
+                               }
+                       }
+                       if (filter) {
+                               filter_a = zmalloc(sizeof(*filter_a) + filter->len);
+                               if (!filter_a) {
+                                       free(filter_expression_a);
+                                       ret = LTTNG_ERR_FATAL;
+                                       goto error;
+                               }
+                               memcpy(filter_a, filter, sizeof(*filter_a) + filter->len);
+                       }
                        event->type = LTTNG_EVENT_TRACEPOINT;   /* Hack */
-                       ret = event_kernel_enable_event(kchan, event);
+                       ret = event_kernel_enable_event(kchan, event,
+                               filter_expression, filter);
                        if (ret != LTTNG_OK) {
                                if (channel_created) {
                                        /* Let's not leak a useless channel. */
                                        kernel_destroy_channel(kchan);
                                }
+                               free(filter_expression_a);
+                               free(filter_a);
                                goto error;
                        }
                        event->type = LTTNG_EVENT_SYSCALL;      /* Hack */
-                       ret = event_kernel_enable_event(kchan, event);
+                       ret = event_kernel_enable_event(kchan, event,
+                               filter_expression_a, filter_a);
                        if (ret != LTTNG_OK) {
+                               free(filter_expression_a);
+                               free(filter_a);
                                goto error;
                        }
                        break;
@@ -1505,7 +1535,8 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain,
                case LTTNG_EVENT_FUNCTION:
                case LTTNG_EVENT_FUNCTION_ENTRY:
                case LTTNG_EVENT_TRACEPOINT:
-                       ret = event_kernel_enable_event(kchan, event);
+                       ret = event_kernel_enable_event(kchan, event,
+                               filter_expression, filter);
                        if (ret != LTTNG_OK) {
                                if (channel_created) {
                                        /* Let's not leak a useless channel. */
@@ -1515,7 +1546,8 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain,
                        }
                        break;
                case LTTNG_EVENT_SYSCALL:
-                       ret = event_kernel_enable_event(kchan, event);
+                       ret = event_kernel_enable_event(kchan, event,
+                               filter_expression, filter);
                        if (ret != LTTNG_OK) {
                                goto error;
                        }