From: Michal Koutný <mkoutny@suse.com>
Date: Fri, 21 Feb 2025 09:29:26 +0000 (+0100)
Subject: ss: Tone down cgroup path resolution
X-Git-Tag: v6.14.0~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99c119a0de0d76effe6926ce213d041cea54aa7a;p=thirdparty%2Fiproute2.git

ss: Tone down cgroup path resolution

Sockets and cgroups have different lifetimes (e.g. fd passing between
cgroups) so obtaining a cgroup id to a removed cgroup dir is not an
error. Furthermore, the message is printed for each such a socket (which
is redundant each such socket's cgroup is shown as 'unreachable').
Improve user experience by silencing these specific errors.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
---

diff --git a/lib/fs.c b/lib/fs.c
index 622f28b3..6fe1d6db 100644
--- a/lib/fs.c
+++ b/lib/fs.c
@@ -223,7 +223,8 @@ char *get_cgroup2_path(__u64 id, bool full)
 
 	fd = open_by_handle_at(mnt_fd, fhp, 0);
 	if (fd < 0) {
-		fprintf(stderr, "Failed to open cgroup2 by ID\n");
+		if (errno != ESTALE)
+			fprintf(stderr, "Failed to open cgroup2 by ID\n");
 		goto out;
 	}