Create agent on channel creation

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/bin/lttng-sessiond/channel.c b/src/bin/lttng-sessiond/channel.c
index 7c95a0d2194d4e6de2e43e726b98ee05fcb2d2cd..8ceb4e8930321ed947ea1216c782558811f0b753 100644 (file)
--- a/src/bin/lttng-sessiond/channel.c
+++ b/src/bin/lttng-sessiond/channel.c
@@ -31,6 +31,7 @@
 #include "ust-ctl.h"
 #include "utils.h"
 #include "ust-app.h"
+#include "agent.h"
 
 /*
  * Return allocated channel attributes.
@@ -272,6 +273,7 @@ int channel_ust_create(struct ltt_ust_session *usess,
        int ret = LTTNG_OK;
        struct ltt_ust_channel *uchan = NULL;
        struct lttng_channel *defattr = NULL;
+       enum lttng_domain_type domain = LTTNG_DOMAIN_UST;
 
        assert(usess);
 
@@ -283,6 +285,18 @@ int channel_ust_create(struct ltt_ust_session *usess,
                        goto error;
                }
                attr = defattr;
+       } else {
+               /*
+                * HACK: Set the channel's subdomain (JUL, Log4j, Python, etc.)
+                * based on the default name.
+                */
+               if (!strcmp(attr->name, DEFAULT_JUL_CHANNEL_NAME)) {
+                       domain = LTTNG_DOMAIN_JUL;
+               } else if (!strcmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME)) {
+                       domain = LTTNG_DOMAIN_LOG4J;
+               } else if (!strcmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME)) {
+                       domain = LTTNG_DOMAIN_PYTHON;
+               }
        }
 
        if (usess->snapshot_mode) {
@@ -343,24 +357,12 @@ int channel_ust_create(struct ltt_ust_session *usess,
        }
 
        /* Create UST channel */
-       uchan = trace_ust_create_channel(attr, LTTNG_DOMAIN_UST);
+       uchan = trace_ust_create_channel(attr, domain);
        if (uchan == NULL) {
                ret = LTTNG_ERR_FATAL;
                goto error;
        }
 
-       /*
-        * HACK: Set the channel's subdomain (JUL, Log4j, Python, etc.)
-        * based on the default name.
-        */
-       if (!strcmp(uchan->name, DEFAULT_JUL_CHANNEL_NAME)) {
-               uchan->domain = LTTNG_DOMAIN_JUL;
-       } else if (!strcmp(uchan->name, DEFAULT_LOG4J_CHANNEL_NAME)) {
-               uchan->domain = LTTNG_DOMAIN_LOG4J;
-       } else if (!strcmp(uchan->name, DEFAULT_PYTHON_CHANNEL_NAME)) {
-               uchan->domain = LTTNG_DOMAIN_PYTHON;
-       }
-
        uchan->enabled = 1;
        if (trace_ust_is_max_id(usess->used_channel_id)) {
                ret = LTTNG_ERR_UST_CHAN_FAIL;
@@ -405,6 +407,18 @@ int channel_ust_create(struct ltt_ust_session *usess,
        rcu_read_unlock();
 
        DBG2("Channel %s created successfully", uchan->name);
+       if (domain != LTTNG_DOMAIN_UST) {
+               struct agent *agt = trace_ust_find_agent(usess, domain);
+
+               if (!agt) {
+                       agt = agent_create(domain);
+                       if (!agt) {
+                               ret = LTTNG_ERR_NOMEM;
+                               goto error_free_chan;
+                       }
+                       agent_add(agt, usess->agents);
+               }
+       }
 
        free(defattr);
        return LTTNG_OK;