Expect filter context identifiers starting with $ctx.

[deliverable/lttng-modules.git] / lttng-context-vtid.c

diff --git a/lttng-context-vtid.c b/lttng-context-vtid.c
index c98bdf1f92a91e6ccca16bac45a47ea01b5f2070..a37bb7673736fa1e10fbab451877cba7234c1576 100644 (file)
--- a/lttng-context-vtid.c
+++ b/lttng-context-vtid.c
@@ -56,6 +56,23 @@ void vtid_record(struct lttng_ctx_field *field,
        chan->ops->event_write(ctx, &vtid, sizeof(vtid));
 }
 
+static
+void vtid_get_value(struct lttng_ctx_field *field,
+               struct lttng_probe_ctx *lttng_probe_ctx,
+               union lttng_ctx_value *value)
+{
+       pid_t vtid;
+
+       /*
+        * nsproxy can be NULL when scheduled out of exit.
+        */
+       if (!current->nsproxy)
+               vtid = 0;
+       else
+               vtid = task_pid_vnr(current);
+       value->s64 = vtid;
+}
+
 int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx)
 {
        struct lttng_ctx_field *field;
@@ -77,6 +94,8 @@ int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx)
        field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
        field->get_size = vtid_get_size;
        field->record = vtid_record;
+       field->get_value = vtid_get_value;
+       lttng_context_update(*ctx);
        wrapper_vmalloc_sync_all();
        return 0;
 }
@@ -85,3 +104,7 @@ EXPORT_SYMBOL_GPL(lttng_add_vtid_to_ctx);
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");
 MODULE_DESCRIPTION("Linux Trace Toolkit vTID Context");
+MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
+       __stringify(LTTNG_MODULES_MINOR_VERSION) "."
+       __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+       LTTNG_MODULES_EXTRAVERSION);