From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 7 Apr 2021 09:21:50 +0000 (+0200)
Subject: generator: explain why systemd-root-fsck.service exists in a comment
X-Git-Tag: v249-rc1~370^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F19381%2Fhead;p=thirdparty%2Fsystemd.git

generator: explain why systemd-root-fsck.service exists in a comment
---

diff --git a/src/shared/generator.c b/src/shared/generator.c
index 7d00c9ef0df..1daa9e7de80 100644
--- a/src/shared/generator.c
+++ b/src/shared/generator.c
@@ -164,6 +164,11 @@ int generator_write_fsck_deps(
         if (path_equal(where, "/")) {
                 const char *lnk;
 
+                /* We support running the fsck instance for the root fs while it is already mounted, for
+                 * compatibility with non-initrd boots. It's ugly, but it is how it is. Since – unlike for
+                 * regular file systems – this means the ordering is reversed (i.e. mount *before* fsck) we
+                 * have a separate fsck unit for this, independent of systemd-fsck@.service. */
+
                 lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/" SPECIAL_FSCK_ROOT_SERVICE);
 
                 (void) mkdir_parents(lnk, 0755);