Remove unneeded creation of the UST domain sub-directory

ust_app_start_trace() always attempts to create its domain
sub-directory after the channel directory has been created. This is
redundant and can be safely removed.

To provide an example, a "domain sub-directory" is:
/home/jgalar/lttng-traces/allo-20190227-115205/ust

A "channel sub-directory" is, in per-uid buffering mode:
/home/jgalar/lttng-traces/allo-20190227-115205/ust/uid/1000/64-bit

or, in per-pid buffering mode:
/home/jgalar/lttng-traces/cloe_fafard-20190227-115609/ust/pid/hello-ust-20186-20190227-115700

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

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 4bee504969bae5685782f9198a939816692008cb..6b9afe3abf4ce0180cb3957da00cdd8036ac6cf7 100644 (file)
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -4399,36 +4399,6 @@ int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
                goto skip_setup;
        }
 
-       /* Create directories if consumer is LOCAL and has a path defined. */
-       if (usess->consumer->type == CONSUMER_DST_LOCAL &&
-                       usess->consumer->dst.session_root_path[0] != '\0') {
-               char tmp_path[LTTNG_PATH_MAX];
-
-               ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s%s",
-                               usess->consumer->dst.session_root_path,
-                               usess->consumer->chunk_path,
-                               usess->consumer->domain_subdir);
-               if (ret >= sizeof(tmp_path)) {
-                       ERR("Local destination path exceeds the maximal allowed length of %zu bytes (needs %i bytes) with path = \"%s%s%s\"",
-                                       sizeof(tmp_path), ret,
-                                       usess->consumer->dst.session_root_path,
-                                       usess->consumer->chunk_path,
-                                       usess->consumer->domain_subdir);
-                       goto error_unlock;
-               }
-
-               DBG("Creating directory path for local tracing: \"%s\"",
-                               tmp_path);
-               ret = run_as_mkdir_recursive(tmp_path, S_IRWXU | S_IRWXG,
-                               ua_sess->euid, ua_sess->egid);
-               if (ret < 0) {
-                       if (errno != EEXIST) {
-                               ERR("Trace directory creation error");
-                               goto error_unlock;
-                       }
-               }
-       }
-
        /*
         * Create the metadata for the application. This returns gracefully if a
         * metadata was already set for the session.