Acked-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
On Mon, Nov 24, 2014 at 9:53 AM, Sachin Prabhu <sprabhu@xxxxxxxxxx> wrote:
> We have encountered failures when When testing smb2 mounts on ppc64
> machines when using both Samba as well as Windows 2012.
>
> On poking around, the problem was determined to be caused by the
> high endian MessageID passed in the header for smb2. On checking the
> corresponding MID for smb1 is converted to LE before being sent on the
> wire.
>
> We have tested this using the RHEL 7 kernel where the patch fixes the
> issue.
>
> Signed-off-by: Sachin Prabhu <sprabhu@xxxxxxxxxx>
> ---
> fs/cifs/cifsglob.h | 6 +++---
> fs/cifs/smb2pdu.h | 2 +-
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
> index 02a33e5..41ec69d 100644
> --- a/fs/cifs/cifsglob.h
> +++ b/fs/cifs/cifsglob.h
> @@ -661,16 +661,16 @@ set_credits(struct TCP_Server_Info *server, const int val)
> server->ops->set_credits(server, val);
> }
>
> -static inline __u64
> +static inline __le64
> get_next_mid64(struct TCP_Server_Info *server)
> {
> - return server->ops->get_next_mid(server);
> + return cpu_to_le64(server->ops->get_next_mid(server));
> }
>
> static inline __le16
> get_next_mid(struct TCP_Server_Info *server)
> {
> - __u16 mid = get_next_mid64(server);
> + __u16 mid = server->ops->get_next_mid(server);
> /*
> * The value in the SMB header should be little endian for easy
> * on-the-wire decoding.
> diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
> index e3188ab..2d4914e 100644
> --- a/fs/cifs/smb2pdu.h
> +++ b/fs/cifs/smb2pdu.h
> @@ -110,7 +110,7 @@ struct smb2_hdr {
> __le16 CreditRequest; /* CreditResponse */
> __le32 Flags;
> __le32 NextCommand;
> - __u64 MessageId; /* opaque - so can stay little endian */
> + __le64 MessageId;
> __le32 ProcessId;
> __u32 TreeId; /* opaque - so do not make little endian */
> __u64 SessionId; /* opaque - so do not make little endian */
> --
> 1.9.3
>
> --
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