package/e2fsprogs: set xattrs for the root dir as well

The mke2fs binary copies the xattrs of the source directory when
creating an image, but this logic did not include the root directory of
the resulting image. A patch was sent upstream to fix this. Include the
patch in Buildroot to allow creating SELinux ready images at build time.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/e2fsprogs/0001-create_inode-set-xattrs-to-the-root-directory-as-wel.patch

@@ -0,0 +1,46 @@
+From 1826d8965057bd84517156a4b75c81bdfdae9ebc Mon Sep 17 00:00:00 2001
+From: Antoine Tenart <antoine.tenart@bootlin.com>
+Date: Wed, 1 Jul 2020 10:06:03 +0200
+Subject: [PATCH] create_inode: set xattrs to the root directory as well
+
+populate_fs do copy the xattrs for all files and directories, but the
+root directory is skipped and as a result its extended attributes aren't
+set. This is an issue when using mkfs to build a full system image that
+can be used with SElinux in enforcing mode without making any runtime
+fix at first boot.
+
+This patch adds logic to set the root directory's extended attributes.
+
+[Uspstream status: sent to the mailing list and has a Reviewed-by tag,
+https://lore.kernel.org/linux-ext4/20200717100846.497546-1-antoine.tenart@bootlin.com/]
+
+Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
+---
+ misc/create_inode.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/misc/create_inode.c b/misc/create_inode.c
+index e8d1df6b55a5..fe66faf1b53d 100644
+--- a/misc/create_inode.c
++++ b/misc/create_inode.c
+@@ -1050,9 +1050,17 @@ errcode_t populate_fs2(ext2_filsys fs, ext2_ino_t parent_ino,
+ 	file_info.path_max_len = 255;
+ 	file_info.path = calloc(file_info.path_max_len, 1);
+ 
++	retval = set_inode_xattr(fs, root, source_dir);
++	if (retval) {
++		com_err(__func__, retval,
++			_("while copying xattrs on root directory"));
++		goto out;
++	}
++
+ 	retval = __populate_fs(fs, parent_ino, source_dir, root, &hdlinks,
+ 			       &file_info, fs_callbacks);
+ 
++out:
+ 	free(file_info.path);
+ 	free(hdlinks.hdl);
+ 	return retval;
+-- 
+2.26.2
+