Add env hostname information

[lttng-modules.git] / lttng-events.c

diff --git a/lttng-events.c b/lttng-events.c
index 9d933935dbf87a6fa6707ee88b9d415df79dfbdd..7a1be7295a7ef33d1e61f692d9a2926c0ed03d77 100644 (file)
--- a/lttng-events.c
+++ b/lttng-events.c
@@ -292,7 +292,7 @@ struct lttng_event *lttng_event_create(struct lttng_channel *chan,
        int ret;
 
        mutex_lock(&sessions_mutex);
-       if (chan->free_event_id == -1UL)
+       if (chan->free_event_id == -1U)
                goto full;
        /*
         * This is O(n^2) (for each event, the loop is called at event
@@ -903,6 +903,7 @@ int _lttng_session_metadata_statedump(struct lttng_session *session)
        unsigned char uuid_s[37], clock_uuid_s[BOOT_ID_LEN];
        struct lttng_channel *chan;
        struct lttng_event *event;
+       char hostname[__NEW_UTS_LEN + 1];
        int ret = 0;
 
        if (!ACCESS_ONCE(session->active))
@@ -959,8 +960,14 @@ int _lttng_session_metadata_statedump(struct lttng_session *session)
        if (ret)
                goto end;
 
+       rcu_read_lock();
+       memcpy(hostname, task_nsproxy(current)->uts_ns->name.nodename,
+               sizeof(hostname));
+       rcu_read_unlock();
+
        ret = lttng_metadata_printf(session,
                "env {\n"
+               "       hostname = \"%s\";\n"
                "       domain = \"kernel\";\n"
                "       sysname = \"%s\";\n"
                "       kernel_release = \"%s\";\n"
@@ -970,6 +977,7 @@ int _lttng_session_metadata_statedump(struct lttng_session *session)
                "       tracer_minor = %d;\n"
                "       tracer_patchlevel = %d;\n"
                "};\n\n",
+               hostname,
                utsname()->sysname,
                utsname()->release,
                utsname()->version,