From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Wed, 27 Feb 2019 17:16:29 +0000 (-0500)
Subject: Remove unneeded creation of the UST domain sub-directory
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=910f2c4845003968bb83824d2e4475ed7e247b59

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 4bee50496..6b9afe3ab 100644
--- 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.