File _service:tar_scm:backport-udev-node-drop-redund... of Package systemd

File _service:tar_scm:backport-udev-node-drop-redundant-trial-of-devlink-creation.patch of Package systemd

From 1df2313e201c39907653a99335b7d21db092fcbc Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 1 Sep 2021 09:29:42 +0900
Subject: [PATCH] udev-node: drop redundant trial of devlink creation

Previously, the devlink was created based on the priority saved in udev
database. So, we needed to reevaluate devlinks after database is saved.

But now the priority is stored in the symlink under /run/udev/links, and
the loop of devlink creation is controlled with the timestamp of the
directory. So, the double evaluation is not necessary anymore.

(cherry picked from commit 7920d0a135fb6a08aa0bfc31e9d0a3f589fe7a1f)

Conflict:NA
Reference:https://github.com/systemd/systemd-stable/commit/1df2313e201c39907653a99335b7d21db092fcbc
---
 src/udev/udev-event.c |  5 +----
 src/udev/udev-node.c  | 12 ++++--------
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
index 8320e96fe2..56fe0a43a7 100644
--- a/src/udev/udev-event.c
+++ b/src/udev/udev-event.c
@@ -1071,10 +1071,7 @@ int udev_event_execute_rules(
 
         device_set_is_initialized(dev);
 
-        /* Yes, we run update_devnode() twice, because in the first invocation, that is before update of udev database,
-         * it could happen that two contenders are replacing each other's symlink. Hence we run it again to make sure
-         * symlinks point to devices that claim them with the highest priority. */
-        return update_devnode(event);
+        return 0;
 }
 
 void udev_event_execute_run(UdevEvent *event, usec_t timeout_usec, int timeout_signal) {
diff --git a/src/udev/udev-node.c b/src/udev/udev-node.c
index d8edf39aec..52816c72fd 100644
--- a/src/udev/udev-node.c
+++ b/src/udev/udev-node.c
@@ -416,7 +416,7 @@ static int link_update(sd_device *dev, const char *slink_in, bool add) {
         _cleanup_free_ char *slink = NULL, *dirname = NULL;
         const char *slink_name;
         char name_enc[NAME_MAX+1];
-        int i, r, retries;
+        int r;
 
         assert(dev);
         assert(slink_in);
@@ -443,11 +443,7 @@ static int link_update(sd_device *dev, const char *slink_in, bool add) {
         if (r < 0)
                 return r;
 
-        /* If the database entry is not written yet we will just do one iteration and possibly wrong symlink
-         * will be fixed in the second invocation. */
-        retries = sd_device_get_is_initialized(dev) > 0 ? LINK_UPDATE_MAX_RETRIES : 1;
-
-        for (i = 0; i < retries; i++) {
+        for (unsigned i = 0; i < LINK_UPDATE_MAX_RETRIES; i++) {
                 _cleanup_free_ char *target = NULL;
                 struct stat st1 = {}, st2 = {};
 
@@ -473,7 +469,7 @@ static int link_update(sd_device *dev, const char *slink_in, bool add) {
                                 log_device_debug_errno(dev, errno, "Failed to remove '%s', ignoring: %m", slink);
 
                         (void) rmdir_parents(slink, "/dev");
-                        break;
+                        return 0;
                 }
 
                 r = node_symlink(dev, target, slink);
@@ -488,7 +484,7 @@ static int link_update(sd_device *dev, const char *slink_in, bool add) {
                         return 0;
         }
 
-        return i < LINK_UPDATE_MAX_RETRIES ? 0 : -ELOOP;
+        return -ELOOP;
 }
 
 static int device_get_devpath_by_devnum(sd_device *dev, char **ret) {
-- 
2.33.0