X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lttng-context-hostname.c;h=28881d05b771eae420114334862610b19b22a265;hb=4949b0e607fa16a22b141c9253c89f930f70e03f;hp=7cf7f7c849b6a9d9572257d76b1501c842a48aab;hpb=06254b0fe2a909dabb889fb0d022384906f6f37a;p=lttng-modules.git

diff --git a/lttng-context-hostname.c b/lttng-context-hostname.c
index 7cf7f7c8..28881d05 100644
--- a/lttng-context-hostname.c
+++ b/lttng-context-hostname.c
@@ -65,6 +65,28 @@ void hostname_record(struct lttng_ctx_field *field,
 	}
 }
 
+static
+void hostname_get_value(struct lttng_ctx_field *field,
+		union lttng_ctx_value *value)
+{
+	struct nsproxy *nsproxy;
+	struct uts_namespace *ns;
+	char *hostname;
+
+	/*
+	 * No need to take the RCU read-side lock to read current
+	 * nsproxy. (documented in nsproxy.h)
+	 */
+	nsproxy = current->nsproxy;
+	if (nsproxy) {
+		ns = nsproxy->uts_ns;
+		hostname = ns->name.nodename;
+	} else {
+		hostname = "";
+	}
+	value->str = hostname;
+}
+
 int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx)
 {
 	struct lttng_ctx_field *field;
@@ -89,6 +111,8 @@ int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx)
 
 	field->get_size = hostname_get_size;
 	field->record = hostname_record;
+	field->get_value = hostname_get_value;
+	lttng_context_update(*ctx);
 	wrapper_vmalloc_sync_all();
 	return 0;
 }
@@ -97,3 +121,7 @@ EXPORT_SYMBOL_GPL(lttng_add_hostname_to_ctx);
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");
 MODULE_DESCRIPTION("Linux Trace Toolkit Perf Support");
+MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
+	__stringify(LTTNG_MODULES_MINOR_VERSION) "."
+	__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+	LTTNG_MODULES_EXTRAVERSION);