---

yaml
---
r: 269970
b: refs/heads/master
c: 44d22d8
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e9097ab48978c89b9c0926e2ae5d49bf6ea91b18
+refs/heads/master: 44d22d846fdc7c3e688fc1ff5ae6d06d08bb5656

trunk/fs/cifs/cifsglob.h

@@ -656,8 +656,24 @@ static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
 struct mid_q_entry;
 
 /*
- * This is the prototype for the mid callback function. When creating one,
- * take special care to avoid deadlocks. Things to bear in mind:
+ * This is the prototype for the mid receive function. This function is for
+ * receiving the rest of the SMB frame, starting with the WordCount (which is
+ * just after the MID in struct smb_hdr). Note:
+ *
+ * - This will be called by cifsd, with no locks held.
+ * - The mid will still be on the pending_mid_q.
+ * - mid->resp_buf will point to the current buffer.
+ *
+ * Returns zero on a successful receive, or an error. The receive state in
+ * the TCP_Server_Info will also be updated.
+ */
+typedef int (mid_receive_t)(struct TCP_Server_Info *server,
+			    struct mid_q_entry *mid);
+
+/*
+ * This is the prototype for the mid callback function. This is called once the
+ * mid has been received off of the socket. When creating one, take special
+ * care to avoid deadlocks. Things to bear in mind:
  *
  * - it will be called by cifsd, with no locks held
  * - the mid will be removed from any lists
@@ -675,9 +691,10 @@ struct mid_q_entry {
 	unsigned long when_sent; /* time when smb send finished */
 	unsigned long when_received; /* when demux complete (taken off wire) */
 #endif
+	mid_receive_t *receive; /* call receive callback */
 	mid_callback_t *callback; /* call completion callback */
 	void *callback_data;	  /* general purpose pointer for callback */
-	struct smb_hdr *resp_buf;	/* response buffer */
+	struct smb_hdr *resp_buf;	/* pointer to received SMB header */
 	int midState;	/* wish this were enum but can not pass to wait_event */
 	__u8 command;	/* smb command code */
 	bool largeBuf:1;	/* if valid response, is pointer to large buf */

trunk/fs/cifs/cifsproto.h

@@ -69,8 +69,9 @@ 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 kvec *iov,
-			   unsigned int nvec, mid_callback_t *callback,
-			   void *cbdata, bool ignore_pend);
+			   unsigned int nvec, mid_receive_t *receive,
+			   mid_callback_t *callback, void *cbdata,
+			   bool ignore_pend);
 extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
 			struct smb_hdr * /* input */ ,
 			struct smb_hdr * /* out */ ,

trunk/fs/cifs/cifssmb.c

@@ -737,7 +737,8 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 	iov.iov_base = smb;
 	iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
 
-	rc = cifs_call_async(server, &iov, 1, cifs_echo_callback, server, true);
+	rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback,
+			     server, true);
 	if (rc)
 		cFYI(1, "Echo request failed: %d", rc);
 
@@ -1834,7 +1835,7 @@ cifs_async_writev(struct cifs_writedata *wdata)
 
 	kref_get(&wdata->refcount);
 	rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1,
-			     cifs_writev_callback, wdata, false);
+			     NULL, cifs_writev_callback, wdata, false);
 
 	if (rc == 0)
 		cifs_stats_inc(&tcon->num_writes);

trunk/fs/cifs/connect.c

@@ -824,7 +824,11 @@ cifs_demultiplex_thread(void *p)
 
 		mid_entry = find_mid(server, smb_buffer);
 
-		length = standard_receive3(server, mid_entry);
+		if (!mid_entry || !mid_entry->receive)
+			length = standard_receive3(server, mid_entry);
+		else
+			length = mid_entry->receive(server, mid_entry);
+
 		if (length < 0)
 			continue;
 

trunk/fs/cifs/transport.c

@@ -339,8 +339,8 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
  */
 int
 cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
-		unsigned int nvec, mid_callback_t *callback, void *cbdata,
-		bool ignore_pend)
+		unsigned int nvec, mid_receive_t *receive,
+		mid_callback_t *callback, void *cbdata, bool ignore_pend)
 {
 	int rc;
 	struct mid_q_entry *mid;
@@ -374,6 +374,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
 		goto out_err;
 	}
 
+	mid->receive = receive;
 	mid->callback = callback;
 	mid->callback_data = cbdata;
 	mid->midState = MID_REQUEST_SUBMITTED;