staging: add Lustre file system client support

Lustre is the most deployed distributed file system
in the HPC (High Performance Computing) world. The patch
adds its client side support.

The code is not very clean and needs to live in drivers/staging
for some time for continuing cleanup work. See
drivers/staging/lustre/TODO for details.

The code is based on Lustre master commit faefbfc04

commit faefbfc0460bc00f2ee4c1c1c86aa1e39b9eea49
Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Date:   Tue Apr 30 23:05:21 2013 +0400

    LU-3244 utils: tunefs.lustre should preserve virgin label

Plus a few under-review patches on Whamcloud gerrit:
3.8 kernel support:
http://review.whamcloud.com/#change,5973
http://review.whamcloud.com/#change,5974
http://review.whamcloud.com/#change,5768
http://review.whamcloud.com/#change,5781
http://review.whamcloud.com/#change,5763
http://review.whamcloud.com/#change,5613
http://review.whamcloud.com/#change,5655

3.9 kernel support:
http://review.whamcloud.com/#change,5898
http://review.whamcloud.com/#change,5899

Kconfig/Kbuild:
http://review.whamcloud.com/#change,4646
http://review.whamcloud.com/#change,4644

libcfs cleanup:
http://review.whamcloud.com/#change,2831
http://review.whamcloud.com/#change,4775
http://review.whamcloud.com/#change,4776
http://review.whamcloud.com/#change,4777
http://review.whamcloud.com/#change,4778
http://review.whamcloud.com/#change,4779
http://review.whamcloud.com/#change,4780

All starting/trailing whitespaces are removed, to match kernel
coding style. Also ran scripts/cleanfile on all lustre source files.

[maked the Kconfig depend on BROKEN as the recent procfs changes causes
this to fail - gregkh]

Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 146 insertions, 0 deletions

diff --git a/drivers/staging/lustre/lnet/selftest/conrpc.h b/drivers/staging/lustre/lnet/selftest/conrpc.h
new file mode 100644
index 000000000000..9aba24a2eab9
--- /dev/null
+++ b/drivers/staging/lustre/lnet/selftest/conrpc.h
@@ -0,0 +1,146 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * /lnet/selftest/conrpc.h
+ *
+ * Console rpc
+ *
+ * Author: Liang Zhen <liang@whamcloud.com>
+ */
+
+#ifndef __LST_CONRPC_H__
+#define __LST_CONRPC_H__
+
+#include <linux/libcfs/libcfs.h>
+#include <linux/lnet/lnet.h>
+#include <linux/lnet/lib-types.h>
+#include <linux/lnet/lnetst.h>
+#include "rpc.h"
+#include "selftest.h"
+
+/* Console rpc and rpc transaction */
+#define LST_TRANS_TIMEOUT       30
+#define LST_TRANS_MIN_TIMEOUT   3
+
+#define LST_VALIDATE_TIMEOUT(t) MIN(MAX(t, LST_TRANS_MIN_TIMEOUT), LST_TRANS_TIMEOUT)
+
+#define LST_PING_INTERVAL       8
+
+struct lstcon_rpc_trans;
+struct lstcon_tsb_hdr;
+struct lstcon_test;
+struct lstcon_node;
+
+typedef struct lstcon_rpc {
+	struct list_head	       crp_link;       /* chain on rpc transaction */
+	srpc_client_rpc_t       *crp_rpc;	/* client rpc */
+	struct lstcon_node      *crp_node;       /* destination node */
+	struct lstcon_rpc_trans *crp_trans;     /* conrpc transaction */
+
+	unsigned int		 crp_posted:1;   /* rpc is posted */
+	unsigned int		 crp_finished:1; /* rpc is finished */
+	unsigned int		 crp_unpacked:1; /* reply is unpacked */
+	/** RPC is embedded in other structure and can't free it */
+	unsigned int		 crp_embedded:1;
+	int		      crp_status;     /* console rpc errors */
+	cfs_time_t	       crp_stamp;      /* replied time stamp */
+} lstcon_rpc_t;
+
+typedef struct lstcon_rpc_trans {
+	struct list_head	    tas_olink;     /* link chain on owner list */
+	struct list_head	    tas_link;      /* link chain on global list */
+	int		   tas_opc;       /* operation code of transaction */
+	/* features mask is uptodate */
+	unsigned	      tas_feats_updated;
+	/* test features mask */
+	unsigned	      tas_features;
+	wait_queue_head_t	   tas_waitq;     /* wait queue head */
+	atomic_t	  tas_remaining; /* # of un-scheduled rpcs */
+	struct list_head	    tas_rpcs_list; /* queued requests */
+} lstcon_rpc_trans_t;
+
+#define LST_TRANS_PRIVATE       0x1000
+
+#define LST_TRANS_SESNEW	(LST_TRANS_PRIVATE | 0x01)
+#define LST_TRANS_SESEND	(LST_TRANS_PRIVATE | 0x02)
+#define LST_TRANS_SESQRY	0x03
+#define LST_TRANS_SESPING       0x04
+
+#define LST_TRANS_TSBCLIADD     (LST_TRANS_PRIVATE | 0x11)
+#define LST_TRANS_TSBSRVADD     (LST_TRANS_PRIVATE | 0x12)
+#define LST_TRANS_TSBRUN	(LST_TRANS_PRIVATE | 0x13)
+#define LST_TRANS_TSBSTOP       (LST_TRANS_PRIVATE | 0x14)
+#define LST_TRANS_TSBCLIQRY     0x15
+#define LST_TRANS_TSBSRVQRY     0x16
+
+#define LST_TRANS_STATQRY       0x21
+
+typedef int (* lstcon_rpc_cond_func_t)(int, struct lstcon_node *, void *);
+typedef int (* lstcon_rpc_readent_func_t)(int, srpc_msg_t *, lstcon_rpc_ent_t *);
+
+int  lstcon_sesrpc_prep(struct lstcon_node *nd, int transop,
+			unsigned version, lstcon_rpc_t **crpc);
+int  lstcon_dbgrpc_prep(struct lstcon_node *nd,
+			unsigned version, lstcon_rpc_t **crpc);
+int  lstcon_batrpc_prep(struct lstcon_node *nd, int transop, unsigned version,
+			struct lstcon_tsb_hdr *tsb, lstcon_rpc_t **crpc);
+int  lstcon_testrpc_prep(struct lstcon_node *nd, int transop, unsigned version,
+			 struct lstcon_test *test, lstcon_rpc_t **crpc);
+int  lstcon_statrpc_prep(struct lstcon_node *nd, unsigned version,
+			 lstcon_rpc_t **crpc);
+void lstcon_rpc_put(lstcon_rpc_t *crpc);
+int  lstcon_rpc_trans_prep(struct list_head *translist,
+			   int transop, lstcon_rpc_trans_t **transpp);
+int  lstcon_rpc_trans_ndlist(struct list_head *ndlist,
+			     struct list_head *translist, int transop,
+			     void *arg, lstcon_rpc_cond_func_t condition,
+			     lstcon_rpc_trans_t **transpp);
+void lstcon_rpc_trans_stat(lstcon_rpc_trans_t *trans,
+			   lstcon_trans_stat_t *stat);
+int  lstcon_rpc_trans_interpreter(lstcon_rpc_trans_t *trans,
+				  struct list_head *head_up,
+				  lstcon_rpc_readent_func_t readent);
+void lstcon_rpc_trans_abort(lstcon_rpc_trans_t *trans, int error);
+void lstcon_rpc_trans_destroy(lstcon_rpc_trans_t *trans);
+void lstcon_rpc_trans_addreq(lstcon_rpc_trans_t *trans, lstcon_rpc_t *req);
+int  lstcon_rpc_trans_postwait(lstcon_rpc_trans_t *trans, int timeout);
+int  lstcon_rpc_pinger_start(void);
+void lstcon_rpc_pinger_stop(void);
+void lstcon_rpc_cleanup_wait(void);
+int  lstcon_rpc_module_init(void);
+void lstcon_rpc_module_fini(void);
+
+
+#endif