cifs: make cifs_send_async take a kvec array

We'll need this for async writes, so convert the call to take a kvec
array. CIFSSMBEcho is changed to put a kvec on the stack and pass
in the SMB buffer using that.

Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

3 files changed, 13 insertions, 10 deletions

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 7aa131112884..f00aa74c2607 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -67,8 +67,8 @@ extern char *cifs_compose_mount_options(const char *sb_mountdata,
 extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
                                         struct TCP_Server_Info *server);
 extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
-extern int cifs_call_async(struct TCP_Server_Info *server,
-                           struct smb_hdr *in_buf, mid_callback_t *callback,
+extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
+                           unsigned int nvec, mid_callback_t *callback,
                            void *cbdata);
 extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
                         struct smb_hdr * /* input */ ,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 83df937b814e..8791c74575d9 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -725,6 +725,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 {
         ECHO_REQ *smb;
         int rc = 0;
+        struct kvec iov;
 
         cFYI(1, "In echo request");
 
@@ -739,9 +740,10 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
         put_bcc(1, &smb->hdr);
         smb->Data[0] = 'a';
         inc_rfc1001_len(smb, 3);
+        iov.iov_base = smb;
+        iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
 
-        rc = cifs_call_async(server, (struct smb_hdr *)smb,
-                                cifs_echo_callback, server);
+        rc = cifs_call_async(server, &iov, 1, cifs_echo_callback, server);
         if (rc)
                 cFYI(1, "Echo request failed: %d", rc);
 
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 43633a79942a..67f59c7b5d79 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -342,11 +342,12 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
  * the result. Caller is responsible for dealing with timeouts.
  */
 int
-cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
-                mid_callback_t *callback, void *cbdata)
+cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
+                unsigned int nvec, mid_callback_t *callback, void *cbdata)
 {
         int rc;
         struct mid_q_entry *mid;
+        struct smb_hdr *hdr = (struct smb_hdr *)iov[0].iov_base;
 
         rc = wait_for_free_request(server, CIFS_ASYNC_OP);
         if (rc)
@@ -354,10 +355,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
 
         /* enable signing if server requires it */
         if (server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
-                in_buf->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+                hdr->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
 
         mutex_lock(&server->srv_mutex);
-        mid = AllocMidQEntry(in_buf, server);
+        mid = AllocMidQEntry(hdr, server);
         if (mid == NULL) {
                 mutex_unlock(&server->srv_mutex);
                 return -ENOMEM;
@@ -368,7 +369,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
         list_add_tail(&mid->qhead, &server->pending_mid_q);
         spin_unlock(&GlobalMid_Lock);
 
-        rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+        rc = cifs_sign_smb2(iov, nvec, server, &mid->sequence_number);
         if (rc) {
                 mutex_unlock(&server->srv_mutex);
                 goto out_err;
@@ -380,7 +381,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
 #ifdef CONFIG_CIFS_STATS2
         atomic_inc(&server->inSend);
 #endif
-        rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
+        rc = smb_sendv(server, iov, nvec);
 #ifdef CONFIG_CIFS_STATS2
         atomic_dec(&server->inSend);
         mid->when_sent = jiffies;