hibernate-resume-generator: wait "infinitely" for the resume device

This makes changes similar to the parent commit, but for hibernate-resume-generator.
If resume= is specified on the kernel command line, we'll set JobRunningTimeoutSec=0
for the device. This matches what we do for the root device.

In practice, other timeouts will take effect. For example dracut tries (and
fails :[ ) to start dracut-emergency.service after some time.

Fixes #7242, https://bugzilla.redhat.com/show_bug.cgi?id=1705522.

1 files changed, 19 insertions, 9 deletions

diff --git a/src/hibernate-resume/hibernate-resume-generator.c b/src/hibernate-resume/hibernate-resume-generator.c
index 3f49f564d6..5e40933fdf 100644
--- a/src/hibernate-resume/hibernate-resume-generator.c
+++ b/src/hibernate-resume/hibernate-resume-generator.c
@@ -5,6 +5,7 @@
 #include <unistd.h>
 
 #include "alloc-util.h"
+#include "dropin.h"
 #include "fstab-util.h"
 #include "generator.h"
 #include "log.h"
@@ -68,18 +69,18 @@ static int parse_proc_cmdline_item(const char *key, const char *value, void *dat
 }
 
 static int process_resume(void) {
-        _cleanup_free_ char *name = NULL, *lnk = NULL;
-        const char *opts;
+        _cleanup_free_ char *service_unit = NULL, *device_unit = NULL, *lnk = NULL;
         int r;
 
         if (!arg_resume_device)
                 return 0;
 
-        r = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_device, ".service", &name);
+        r = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_device, ".service",
+                                         &service_unit);
         if (r < 0)
                 return log_error_errno(r, "Failed to generate unit name: %m");
 
-        lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", name);
+        lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", service_unit);
         if (!lnk)
                 return log_oom();
 
@@ -87,12 +88,21 @@ static int process_resume(void) {
         if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-hibernate-resume@.service", lnk) < 0)
                 return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
 
-        if (arg_resume_options)
-                opts = arg_resume_options;
-        else
-                opts = arg_root_options;
+        r = unit_name_from_path(arg_resume_device, ".device", &device_unit);
+        if (r < 0)
+                return log_error_errno(r, "Failed to generate unit name: %m");
+
+        r = write_drop_in(arg_dest, device_unit, 40, "device-timeout",
+                          "# Automatically generated by systemd-cryptsetup-generator\n\n"
+                          "[Unit]\nJobTimeoutSec=0");
+        if (r < 0)
+                log_warning_errno(r, "Failed to write device timeout drop-in: %m");
 
-        r = generator_write_timeouts(arg_dest, arg_resume_device, arg_resume_device, opts, NULL);
+        r = generator_write_timeouts(arg_dest,
+                                     arg_resume_device,
+                                     arg_resume_device,
+                                     arg_resume_options ?: arg_root_options,
+                                     NULL);
         if (r < 0)
                 return r;