Merge tag '6.6-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fixes from Steve French:
"Six smb3 client fixes, including three for stable, from the SMB
plugfest (testing event) this week:

- Reparse point handling fix (found when investigating dir
enumeration when fifo in dir)

- Fix excessive thread creation for dir lease cleanup

- UAF fix in negotiate path

- remove duplicate error message mapping and fix confusing warning
message

- add dynamic trace point to improve debugging RDMA connection
attempts"

* tag '6.6-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb3: fix confusing debug message
smb: client: handle STATUS_IO_REPARSE_TAG_NOT_HANDLED
smb3: remove duplicate error mapping
cifs: Fix UAF in cifs_demultiplex_thread()
smb3: do not start laundromat thread when dir leases disabled
smb3: Add dynamic trace points for RDMA (smbdirect) reconnect

fs/smb/client/cached_dir.c

···
 	struct cached_fid *cfid, *q;
 	LIST_HEAD(entry);
 
+	if (cfids == NULL)
+		return;
+
 	spin_lock(&cfids->cfid_list_lock);
 	list_for_each_entry_safe(cfid, q, &cfids->entries, entry) {
 		list_move(&cfid->entry, &entry);
···
 {
 	struct cached_fid *cfid, *q;
 	LIST_HEAD(entry);
+
+	if (cfids == NULL)
+		return;
 
 	if (cfids->laundromat) {
 		kthread_stop(cfids->laundromat);

fs/smb/client/cifsglob.h

···
 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 #define   MID_RESPONSE_MALFORMED 0x10
 #define   MID_SHUTDOWN		 0x20
+#define   MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */
 
 /* Flags */
 #define   MID_WAIT_CANCELLED	 1 /* Cancelled while waiting for response */
···
  * cifsInodeInfo->lock_sem	cifsInodeInfo->llist		cifs_init_once
  *				->can_cache_brlcks
  * cifsInodeInfo->deferred_lock	cifsInodeInfo->deferred_closes	cifsInodeInfo_alloc
- * cached_fid->fid_mutex		cifs_tcon->crfid		tconInfoAlloc
+ * cached_fid->fid_mutex		cifs_tcon->crfid		tcon_info_alloc
  * cifsFileInfo->fh_mutex		cifsFileInfo			cifs_new_fileinfo
  * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
  *				->invalidHandle			initiate_cifs_search

fs/smb/client/cifsproto.h

···
 
 extern struct cifs_ses *sesInfoAlloc(void);
 extern void sesInfoFree(struct cifs_ses *);
-extern struct cifs_tcon *tconInfoAlloc(void);
+extern struct cifs_tcon *tcon_info_alloc(bool dir_leases_enabled);
 extern void tconInfoFree(struct cifs_tcon *);
 
 extern int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,

fs/smb/client/connect.c

···
 		}
 	}
 
-	tcon = tconInfoAlloc();
+	/* no need to setup directory caching on IPC share, so pass in false */
+	tcon = tcon_info_alloc(false);
 	if (tcon == NULL)
 		return -ENOMEM;
 
···
 		goto out_fail;
 	}
 
-	tcon = tconInfoAlloc();
+	if (ses->server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING)
+		tcon = tcon_info_alloc(true);
+	else
+		tcon = tcon_info_alloc(false);
 	if (tcon == NULL) {
 		rc = -ENOMEM;
 		goto out_fail;

fs/smb/client/misc.c

···
 }
 
 struct cifs_tcon *
-tconInfoAlloc(void)
+tcon_info_alloc(bool dir_leases_enabled)
 {
 	struct cifs_tcon *ret_buf;
 
 	ret_buf = kzalloc(sizeof(*ret_buf), GFP_KERNEL);
 	if (!ret_buf)
 		return NULL;
-	ret_buf->cfids = init_cached_dirs();
-	if (!ret_buf->cfids) {
-		kfree(ret_buf);
-		return NULL;
+
+	if (dir_leases_enabled == true) {
+		ret_buf->cfids = init_cached_dirs();
+		if (!ret_buf->cfids) {
+			kfree(ret_buf);
+			return NULL;
+		}
 	}
+	/* else ret_buf->cfids is already set to NULL above */
 
 	atomic_inc(&tconInfoAllocCount);
 	ret_buf->status = TID_NEW;

fs/smb/client/smb2inode.c

···
 	int rc = 0;
 
 	switch (rsp->hdr.Status) {
+	case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
+		reparse_point = true;
+		break;
 	case STATUS_STOPPED_ON_SYMLINK:
 		rc = smb2_parse_symlink_response(cifs_sb, iov,
 						 &data->symlink_target);

fs/smb/client/smb2maperror.c

···
 	"STATUS_IO_REPARSE_TAG_MISMATCH"},
 	{STATUS_IO_REPARSE_DATA_INVALID, -EIO,
 	"STATUS_IO_REPARSE_DATA_INVALID"},
-	{STATUS_IO_REPARSE_TAG_NOT_HANDLED, -EIO,
-	"STATUS_IO_REPARSE_TAG_NOT_HANDLED"},
 	{STATUS_REPARSE_POINT_NOT_RESOLVED, -EIO,
 	"STATUS_REPARSE_POINT_NOT_RESOLVED"},
 	{STATUS_DIRECTORY_IS_A_REPARSE_POINT, -EIO,

fs/smb/client/smb2pdu.c

···
 
 	iov[num].iov_base = create_posix_buf(mode);
 	if (mode == ACL_NO_MODE)
-		cifs_dbg(FYI, "Invalid mode\n");
+		cifs_dbg(FYI, "%s: no mode\n", __func__);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_posix);
···
 		goto done;
 
 	/* allocate a dummy tcon struct used for reconnect */
-	tcon = tconInfoAlloc();
+	tcon = tcon_info_alloc(false);
 	if (!tcon) {
 		resched = true;
 		list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {

fs/smb/client/smbdirect.c

···
 	server->smbd_conn = smbd_get_connection(
 		server, (struct sockaddr *) &server->dstaddr);
 
-	if (server->smbd_conn)
+	if (server->smbd_conn) {
 		cifs_dbg(VFS, "RDMA transport re-established\n");
-
-	return server->smbd_conn ? 0 : -ENOENT;
+		trace_smb3_smbd_connect_done(server->hostname, server->conn_id, &server->dstaddr);
+		return 0;
+	}
+	trace_smb3_smbd_connect_err(server->hostname, server->conn_id, &server->dstaddr);
+	return -ENOENT;
 }
 
 static void destroy_caches_and_workqueue(struct smbd_connection *info)

fs/smb/client/trace.h

···
 	TP_ARGS(hostname, conn_id, addr))
 
 DEFINE_SMB3_CONNECT_EVENT(connect_done);
+DEFINE_SMB3_CONNECT_EVENT(smbd_connect_done);
+DEFINE_SMB3_CONNECT_EVENT(smbd_connect_err);
 
 DECLARE_EVENT_CLASS(smb3_connect_err_class,
 	TP_PROTO(char *hostname, __u64 conn_id,

fs/smb/client/transport.c

···
 void
 cifs_wake_up_task(struct mid_q_entry *mid)
 {
+	if (mid->mid_state == MID_RESPONSE_RECEIVED)
+		mid->mid_state = MID_RESPONSE_READY;
 	wake_up_process(mid->callback_data);
 }
 
···
 	struct TCP_Server_Info *server = midEntry->server;
 
 	if (midEntry->resp_buf && (midEntry->mid_flags & MID_WAIT_CANCELLED) &&
-	    midEntry->mid_state == MID_RESPONSE_RECEIVED &&
+	    (midEntry->mid_state == MID_RESPONSE_RECEIVED ||
+	     midEntry->mid_state == MID_RESPONSE_READY) &&
 	    server->ops->handle_cancelled_mid)
 		server->ops->handle_cancelled_mid(midEntry, server);
 
···
 	int error;
 
 	error = wait_event_state(server->response_q,
-				 midQ->mid_state != MID_REQUEST_SUBMITTED,
+				 midQ->mid_state != MID_REQUEST_SUBMITTED &&
+				 midQ->mid_state != MID_RESPONSE_RECEIVED,
 				 (TASK_KILLABLE|TASK_FREEZABLE_UNSAFE));
 	if (error < 0)
 		return -ERESTARTSYS;
···
 
 	spin_lock(&server->mid_lock);
 	switch (mid->mid_state) {
-	case MID_RESPONSE_RECEIVED:
+	case MID_RESPONSE_READY:
 		spin_unlock(&server->mid_lock);
 		return rc;
 	case MID_RETRY_NEEDED:
···
 	credits.instance = server->reconnect_instance;
 
 	add_credits(server, &credits, mid->optype);
+
+	if (mid->mid_state == MID_RESPONSE_RECEIVED)
+		mid->mid_state = MID_RESPONSE_READY;
 }
 
 static void
···
 			send_cancel(server, &rqst[i], midQ[i]);
 			spin_lock(&server->mid_lock);
 			midQ[i]->mid_flags |= MID_WAIT_CANCELLED;
-			if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED) {
+			if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED ||
+			    midQ[i]->mid_state == MID_RESPONSE_RECEIVED) {
 				midQ[i]->callback = cifs_cancelled_callback;
 				cancelled_mid[i] = true;
 				credits[i].value = 0;
···
 		}
 
 		if (!midQ[i]->resp_buf ||
-		    midQ[i]->mid_state != MID_RESPONSE_RECEIVED) {
+		    midQ[i]->mid_state != MID_RESPONSE_READY) {
 			rc = -EIO;
 			cifs_dbg(FYI, "Bad MID state?\n");
 			goto out;
···
 	if (rc != 0) {
 		send_cancel(server, &rqst, midQ);
 		spin_lock(&server->mid_lock);
-		if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
+		if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		    midQ->mid_state == MID_RESPONSE_RECEIVED) {
 			/* no longer considered to be "in-flight" */
 			midQ->callback = release_mid;
 			spin_unlock(&server->mid_lock);
···
 	}
 
 	if (!midQ->resp_buf || !out_buf ||
-	    midQ->mid_state != MID_RESPONSE_RECEIVED) {
+	    midQ->mid_state != MID_RESPONSE_READY) {
 		rc = -EIO;
 		cifs_server_dbg(VFS, "Bad MID state?\n");
 		goto out;
···
 
 	/* Wait for a reply - allow signals to interrupt. */
 	rc = wait_event_interruptible(server->response_q,
-		(!(midQ->mid_state == MID_REQUEST_SUBMITTED)) ||
+		(!(midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		   midQ->mid_state == MID_RESPONSE_RECEIVED)) ||
 		((server->tcpStatus != CifsGood) &&
 		 (server->tcpStatus != CifsNew)));
 
 	/* Were we interrupted by a signal ? */
 	spin_lock(&server->srv_lock);
 	if ((rc == -ERESTARTSYS) &&
-		(midQ->mid_state == MID_REQUEST_SUBMITTED) &&
+		(midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		 midQ->mid_state == MID_RESPONSE_RECEIVED) &&
 		((server->tcpStatus == CifsGood) ||
 		 (server->tcpStatus == CifsNew))) {
 		spin_unlock(&server->srv_lock);
···
 		if (rc) {
 			send_cancel(server, &rqst, midQ);
 			spin_lock(&server->mid_lock);
-			if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
+			if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
+			    midQ->mid_state == MID_RESPONSE_RECEIVED) {
 				/* no longer considered to be "in-flight" */
 				midQ->callback = release_mid;
 				spin_unlock(&server->mid_lock);
···
 		return rc;
 
 	/* rcvd frame is ok */
-	if (out_buf == NULL || midQ->mid_state != MID_RESPONSE_RECEIVED) {
+	if (out_buf == NULL || midQ->mid_state != MID_RESPONSE_READY) {
 		rc = -EIO;
 		cifs_tcon_dbg(VFS, "Bad MID state?\n");
 		goto out;