From 754ba6bd338a15a698a3152e8fbecbc20d09afec Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>

Date: Wed, 6 May 2015 01:09:53 -0400

Subject: [PATCH] Generate systemd-fsck-root.service in the initramfs

In the initrafms, generate a systemd-fsck-root.service to replace

systemd-fsck@<sysroot-device>.service. This way, after we transition

to the real root, systemd-fsck-root.service is marked as already done.

This introduces an unnecessary synchronization point, because

systemd-fsck@* is ordered after systemd-fsck-root also in the

initramfs. In practice this shouldn't be a problem.

https://bugzilla.redhat.com/show_bug.cgi?id=1201979

C.f. 956eaf2b8d6c9999024705ddadc7393bc707de02.

(cherry picked from commit 4dda4e637e4c17a14db6cd265f36f5e8a5050367)

---

 src/shared/generator.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++----

 1 file changed, 59 insertions(+), 4 deletions(-)

diff --git a/src/shared/generator.c b/src/shared/generator.c

index cd37812f86..148a0b077b 100644

--- a/src/shared/generator.c

+++ b/src/shared/generator.c

@@ -29,8 +29,51 @@

 #include "generator.h"

 #include "path-util.h"

 #include "fstab-util.h"

+#include "fileio.h"

 #include "dropin.h"

+static int write_fsck_sysroot_service(const char *dir, const char *what) {

+        const char *unit;

+        _cleanup_free_ char *device = NULL;

+        _cleanup_fclose_ FILE *f = NULL;

+

+        unit = strjoina(dir, "/systemd-fsck-root.service");

+        log_debug("Creating %s", unit);

+

+        device = unit_name_from_path(what, ".device");

+        if (!device)

+                return log_oom();

+

+        f = fopen(unit, "wxe");

+        if (!f)

+                return log_error_errno(errno, "Failed to create unit file %s: %m", unit);

+

+        fprintf(f,

+                "# Automatically generated by %1$s\n\n"

+                "[Unit]\n"

+                "Documentation=man:systemd-fsck-root.service(8)\n"

+                "Description=File System Check on %2$s\n"

+                "DefaultDependencies=no\n"

+                "BindsTo=%3$s\n"

+                "After=%3$s\n"

+                "Before=shutdown.target\n"

+                "\n"

+                "[Service]\n"

+                "Type=oneshot\n"

+                "RemainAfterExit=yes\n"

+                "ExecStart=/usr/lib/systemd/systemd-fsck %2$s\n"

+                "TimeoutSec=0\n",

+                program_invocation_short_name,

+                what,

+                device);

+

+        fflush(f);

+        if (ferror(f))

+                return log_error_errno(errno, "Failed to write unit file %s: %m", unit);

+

+        return 0;

+}

+

 int generator_write_fsck_deps(

                 FILE *f,

                 const char *dir,

@@ -69,11 +112,23 @@ int generator_write_fsck_deps(

                         return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);

         } else {

-                _cleanup_free_ char *fsck = NULL;

+                _cleanup_free_ char *_fsck = NULL;

+                const char *fsck;

+                int r;

+

+                if (in_initrd() && path_equal(where, "/sysroot")) {

+                        r = write_fsck_sysroot_service(dir, what);

+                        if (r < 0)

+                                return r;

+

+                        fsck = "systemd-fsck-root.service";

+                } else {

+                        _fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");

+                        if (!_fsck)

+                                return log_oom();

-                fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");

-                if (!fsck)

-                        return log_oom();

+                        fsck = _fsck;

+                }

                 fprintf(f,

                         "RequiresOverridable=%1$s\n"