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Set unicode flag on cifs echo request to avoid Mac error

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Mac requires the unicode flag to be set for cifs, even for the smb
echo request (which doesn't have strings).

Without this Mac rejects the periodic echo requests (when mounting
with cifs) that we use to check if server is down

Signed-off-by: Steve French <smfrench@gmail.com>
CC: Stable <stable@vger.kernel.org>
This commit is contained in:
Steve French 2017-05-02 13:35:20 -05:00
parent c610c4b619
commit 26c9cb668c
1 changed files with 3 additions and 0 deletions
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3
fs/cifs/cifssmb.c
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@ -718,6 +718,9 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
if (rc)
return rc;
if (server->capabilities & CAP_UNICODE)
smb->hdr.Flags2 |= SMBFLG2_UNICODE;
/* set up echo request */
smb->hdr.Tid = 0xffff;
smb->hdr.WordCount = 1;