CIFS: Add SMB2 support for async requests

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

3 files changed, 27 insertions, 1 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 2f9950e43911..8672e49d1c4c 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -209,6 +209,7 @@ smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
 
 struct smb_version_operations smb21_operations = {
         .setup_request = smb2_setup_request,
+        .setup_async_request = smb2_setup_async_request,
         .check_receive = smb2_check_receive,
         .add_credits = smb2_add_credits,
         .set_credits = smb2_set_credits,
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 1517b4c03c90..1a17955c35c9 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -43,6 +43,10 @@ extern int smb2_check_receive(struct mid_q_entry *mid,
                               struct TCP_Server_Info *server, bool log_error);
 extern int smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
                               unsigned int nvec, struct mid_q_entry **ret_mid);
+extern int smb2_setup_async_request(struct TCP_Server_Info *server,
+                                    struct kvec *iov, unsigned int nvec,
+                                    struct mid_q_entry **ret_mid);
+extern void smb2_echo_request(struct work_struct *work);
 
 extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
                                 struct cifs_sb_info *cifs_sb,
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index b4b6b9a6c0fb..31f5d420b3ea 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -148,4 +148,25 @@ smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
         return rc;
 }
 
-/* BB add missing functions here */
+int
+smb2_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
+                         unsigned int nvec, struct mid_q_entry **ret_mid)
+{
+        int rc = 0;
+        struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base;
+        struct mid_q_entry *mid;
+
+        smb2_seq_num_into_buf(server, hdr);
+
+        mid = smb2_mid_entry_alloc(hdr, server);
+        if (mid == NULL)
+                return -ENOMEM;
+
+        /* rc = smb2_sign_smb2(iov, nvec, server);
+        if (rc) {
+                DeleteMidQEntry(mid);
+                return rc;
+        }*/
+        *ret_mid = mid;
+        return rc;
+}