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@@ -0,0 +1,151 @@
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+/*
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+ * fs/cifs/smb2transport.c
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+ *
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+ * Copyright (C) International Business Machines Corp., 2002, 2011
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+ * Etersoft, 2012
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+ * Author(s): Steve French (sfrench@us.ibm.com)
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+ * Jeremy Allison (jra@samba.org) 2006
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+ * Pavel Shilovsky (pshilovsky@samba.org) 2012
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+ *
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+ * This library is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU Lesser General Public License as published
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+ * by the Free Software Foundation; either version 2.1 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This library is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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+ * the GNU Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public License
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+ * along with this library; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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+
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+#include <linux/fs.h>
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+#include <linux/list.h>
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+#include <linux/wait.h>
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+#include <linux/net.h>
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+#include <linux/delay.h>
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+#include <linux/uaccess.h>
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+#include <asm/processor.h>
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+#include <linux/mempool.h>
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+#include "smb2pdu.h"
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+#include "cifsglob.h"
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+#include "cifsproto.h"
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+#include "smb2proto.h"
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+#include "cifs_debug.h"
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+#include "smb2status.h"
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+
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+/*
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+ * Set message id for the request. Should be called after wait_for_free_request
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+ * and when srv_mutex is held.
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+ */
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+static inline void
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+smb2_seq_num_into_buf(struct TCP_Server_Info *server, struct smb2_hdr *hdr)
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+{
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+ hdr->MessageId = get_next_mid(server);
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+}
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+
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+static struct mid_q_entry *
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+smb2_mid_entry_alloc(const struct smb2_hdr *smb_buffer,
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+ struct TCP_Server_Info *server)
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+{
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+ struct mid_q_entry *temp;
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+
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+ if (server == NULL) {
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+ cERROR(1, "Null TCP session in smb2_mid_entry_alloc");
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+ return NULL;
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+ }
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+
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+ temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
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+ if (temp == NULL)
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+ return temp;
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+ else {
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+ memset(temp, 0, sizeof(struct mid_q_entry));
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+ temp->mid = smb_buffer->MessageId; /* always LE */
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+ temp->pid = current->pid;
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+ temp->command = smb_buffer->Command; /* Always LE */
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+ temp->when_alloc = jiffies;
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+ temp->server = server;
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+
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+ /*
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+ * The default is for the mid to be synchronous, so the
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+ * default callback just wakes up the current task.
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+ */
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+ temp->callback = cifs_wake_up_task;
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+ temp->callback_data = current;
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+ }
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+
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+ atomic_inc(&midCount);
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+ temp->mid_state = MID_REQUEST_ALLOCATED;
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+ return temp;
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+}
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+
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+static int
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+smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_hdr *buf,
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+ struct mid_q_entry **mid)
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+{
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+ if (ses->server->tcpStatus == CifsExiting)
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+ return -ENOENT;
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+
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+ if (ses->server->tcpStatus == CifsNeedReconnect) {
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+ cFYI(1, "tcp session dead - return to caller to retry");
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+ return -EAGAIN;
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+ }
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+
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+ if (ses->status != CifsGood) {
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+ /* check if SMB2 session is bad because we are setting it up */
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+ if ((buf->Command != SMB2_SESSION_SETUP) &&
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+ (buf->Command != SMB2_NEGOTIATE))
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+ return -EAGAIN;
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+ /* else ok - we are setting up session */
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+ }
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+ *mid = smb2_mid_entry_alloc(buf, ses->server);
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+ if (*mid == NULL)
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+ return -ENOMEM;
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+ spin_lock(&GlobalMid_Lock);
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+ list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q);
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+ spin_unlock(&GlobalMid_Lock);
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+ return 0;
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+}
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+
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+int
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+smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
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+ bool log_error)
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+{
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+ unsigned int len = get_rfc1002_length(mid->resp_buf);
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+
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+ dump_smb(mid->resp_buf, min_t(u32, 80, len));
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+ /* convert the length into a more usable form */
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+ /* BB - uncomment with SMB2 signing implementation */
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+ /* if ((len > 24) &&
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+ (server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) {
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+ if (smb2_verify_signature(mid->resp_buf, server))
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+ cERROR(1, "Unexpected SMB signature");
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+ } */
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+
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+ return map_smb2_to_linux_error(mid->resp_buf, log_error);
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+}
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+
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+int
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+smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
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+ unsigned int nvec, struct mid_q_entry **ret_mid)
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+{
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+ int rc;
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+ struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base;
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+ struct mid_q_entry *mid;
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+
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+ smb2_seq_num_into_buf(ses->server, hdr);
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+
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+ rc = smb2_get_mid_entry(ses, hdr, &mid);
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+ if (rc)
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+ return rc;
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+ /* rc = smb2_sign_smb2(iov, nvec, ses->server);
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+ if (rc)
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+ delete_mid(mid); */
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+ *ret_mid = mid;
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+ return rc;
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+}
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+
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+/* BB add missing functions here */
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Pavel Shilovsky