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Date:   Fri, 14 Jan 2022 22:52:22 +0300
From:   Eugene Korenevsky <ekorenevsky@astralinux.ru>
To:     linux-cifs@vger.kernel.org
Cc:     Steve French <sfrench@samba.org>
Subject: fix for "CIFS: DFS namespaces with non-ASCII symbols cannot be
 mounted" #215440 bug
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The following patchset fixes the bug.

The test case (verified by me):

1. At Windows, create DFS namespace with name containing non-ASCII
symbols (for example дфс)

2. At Linux SMB client (kernel must be built with
CONFIG_CIFS_DFS_UPCALL) execute command

/sbin/mount.cifs //<smb_server>/дфс  /tmp/dfs -o domain=...,user=...,password=...

3. ls /tmp/dfs/<existing_dfs_ref>
-> (before the patchset applied) error "No such file or directory"
-> (after the patchset applied) result of successful ls

4. ls /tmp/dfs/<non_existing_dfs_ref>
-> (before the patchset applied) error "No such file or directory"
-> (after the patchset applied) error "No such file or directory"

--
Eugene