From 2b80d049eb6dd08431f63fc0c5ce78567648a033 Mon Sep 17 00:00:00 2001 From: Steve French Date: Sun, 23 Jun 2013 18:43:37 -0500 Subject: Charge at least one credit, if server says that it supports multicredit In SMB2.1 and later the server will usually set the large MTU flag, and we need to charge at least one credit, if server says that since it supports multicredit. Windows seems to let us get away with putting a zero there, but they confirmed that it is wrong and the spec says to put one there (if the request is under 64K and the CAP_LARGE_MTU was returned during protocol negotiation by the server. CC: Pavel Shilovsky Signed-off-by: Steve French --- fs/cifs/smb2pdu.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 92fd6c59c125..0de6a82e2465 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1,7 +1,7 @@ /* * fs/cifs/smb2pdu.c * - * Copyright (C) International Business Machines Corp., 2009, 2012 + * Copyright (C) International Business Machines Corp., 2009, 2013 * Etersoft, 2012 * Author(s): Steve French (sfrench@us.ibm.com) * Pavel Shilovsky (pshilovsky@samba.org) 2012 @@ -108,6 +108,13 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , if (!tcon) goto out; + /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */ + /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ + /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ + if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU) + hdr->CreditCharge = cpu_to_le16(1); + /* else CreditCharge MBZ */ + hdr->TreeId = tcon->tid; /* Uid is not converted */ if (tcon->ses) -- cgit v1.2.3