From: Karel Zak <kzak@redhat.com>
Date: Wed, 16 May 2018 11:20:01 +0000 (+0200)
Subject: lib/sysfs: add sysfs_blkdev_get_parent()
X-Git-Tag: v2.33-rc1~196
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8c3d9cad1ecb3c4ba78604ea4416620f6a6566ab;p=thirdparty%2Futil-linux.git

lib/sysfs: add sysfs_blkdev_get_parent()

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/include/sysfs.h b/include/sysfs.h
index ea87d6a125..a7e66f74b8 100644
--- a/include/sysfs.h
+++ b/include/sysfs.h
@@ -68,7 +68,9 @@ void ul_sysfs_init_debug(void);
 
 struct path_cxt *ul_new_sysfs_path(dev_t devno, struct path_cxt *parent, const char *prefix);
 int sysfs_blkdev_init_path(struct path_cxt *pc, dev_t devno, struct path_cxt *parent);
+
 int sysfs_blkdev_set_parent(struct path_cxt *pc, struct path_cxt *parent);
+struct path_cxt *sysfs_blkdev_get_parent(struct path_cxt *pc);
 
 char *sysfs_blkdev_get_name(struct path_cxt *pc, char *buf, size_t bufsiz);
 int sysfs_blkdev_is_partition_dirent(DIR *dir, struct dirent *d, const char *parent_name);
diff --git a/lib/sysfs.c b/lib/sysfs.c
index 5b4031e00b..953627715d 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -148,6 +148,12 @@ int sysfs_blkdev_set_parent(struct path_cxt *pc, struct path_cxt *parent)
 	return 0;
 }
 
+struct path_cxt *sysfs_blkdev_get_parent(struct path_cxt *pc)
+{
+	struct sysfs_blkdev *blk = ul_path_get_dialect(pc);
+	return blk ? blk->parent : NULL;
+}
+
 /*
  * Redirects ENOENT errors to the parent, if the path is to the queue/
  * sysfs directory. For example