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, 180 insertions, 0 deletions

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_internal.h b/drivers/staging/lustre/lustre/mdc/mdc_internal.h
new file mode 100644
index 000000000000..2aeff0ecec34
--- /dev/null
+++ b/drivers/staging/lustre/lustre/mdc/mdc_internal.h
@@ -0,0 +1,180 @@
+/*
+ * 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) 2003, 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.
+ */
+
+#ifndef _MDC_INTERNAL_H
+#define _MDC_INTERNAL_H
+
+#include <lustre_mdc.h>
+#include <lustre_mds.h>
+
+#ifdef LPROCFS
+void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars);
+#else
+static inline void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
+{
+	memset(lvars, 0, sizeof(*lvars));
+}
+#endif
+
+void mdc_pack_body(struct ptlrpc_request *req, const struct lu_fid *fid,
+		   struct obd_capa *oc, __u64 valid, int ea_size,
+		   __u32 suppgid, int flags);
+void mdc_pack_capa(struct ptlrpc_request *req,
+		   const struct req_msg_field *field, struct obd_capa *oc);
+int mdc_pack_req(struct ptlrpc_request *req, int version, int opc);
+void mdc_is_subdir_pack(struct ptlrpc_request *req, const struct lu_fid *pfid,
+			const struct lu_fid *cfid, int flags);
+void mdc_swap_layouts_pack(struct ptlrpc_request *req,
+			   struct md_op_data *op_data);
+void mdc_readdir_pack(struct ptlrpc_request *req, __u64 pgoff, __u32 size,
+		      const struct lu_fid *fid, struct obd_capa *oc);
+void mdc_getattr_pack(struct ptlrpc_request *req, __u64 valid, int flags,
+		      struct md_op_data *data, int ea_size);
+void mdc_setattr_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
+		     void *ea, int ealen, void *ea2, int ea2len);
+void mdc_create_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
+		     const void *data, int datalen, __u32 mode, __u32 uid,
+		     __u32 gid, cfs_cap_t capability, __u64 rdev);
+void mdc_open_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
+		   __u32 mode, __u64 rdev, __u32 flags, const void *data,
+		   int datalen);
+void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data);
+void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data);
+void mdc_rename_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
+		     const char *old, int oldlen, const char *new, int newlen);
+void mdc_close_pack(struct ptlrpc_request *req, struct md_op_data *op_data);
+int mdc_enter_request(struct client_obd *cli);
+void mdc_exit_request(struct client_obd *cli);
+
+/* mdc/mdc_locks.c */
+int mdc_set_lock_data(struct obd_export *exp,
+		      __u64 *lockh, void *data, __u64 *bits);
+
+int mdc_null_inode(struct obd_export *exp, const struct lu_fid *fid);
+
+int mdc_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
+		    ldlm_iterator_t it, void *data);
+
+int mdc_intent_lock(struct obd_export *exp,
+		    struct md_op_data *,
+		    void *lmm, int lmmsize,
+		    struct lookup_intent *, int,
+		    struct ptlrpc_request **reqp,
+		    ldlm_blocking_callback cb_blocking,
+		    __u64 extra_lock_flags);
+int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
+		struct lookup_intent *it, struct md_op_data *op_data,
+		struct lustre_handle *lockh, void *lmm, int lmmsize,
+		struct ptlrpc_request **req, __u64 extra_lock_flags);
+
+int mdc_resource_get_unused(struct obd_export *exp, struct lu_fid *fid,
+			    struct list_head *cancels, ldlm_mode_t mode,
+			    __u64 bits);
+/* mdc/mdc_request.c */
+int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
+		  struct md_op_data *op_data);
+
+int mdc_open(struct obd_export *exp, obd_id ino, int type, int flags,
+	     struct lov_mds_md *lmm, int lmm_size, struct lustre_handle *fh,
+	     struct ptlrpc_request **);
+
+struct obd_client_handle;
+
+int mdc_get_lustre_md(struct obd_export *md_exp, struct ptlrpc_request *req,
+		      struct obd_export *dt_exp, struct obd_export *lmv_exp,
+		      struct lustre_md *md);
+
+int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md);
+
+int mdc_set_open_replay_data(struct obd_export *exp,
+			     struct obd_client_handle *och,
+			     struct ptlrpc_request *open_req);
+
+int mdc_clear_open_replay_data(struct obd_export *exp,
+			       struct obd_client_handle *och);
+void mdc_commit_open(struct ptlrpc_request *req);
+void mdc_replay_open(struct ptlrpc_request *req);
+
+int mdc_create(struct obd_export *exp, struct md_op_data *op_data,
+	       const void *data, int datalen, int mode, __u32 uid, __u32 gid,
+	       cfs_cap_t capability, __u64 rdev,
+	       struct ptlrpc_request **request);
+int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
+	     struct ptlrpc_request **request);
+int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
+	       const char *old, int oldlen, const char *new, int newlen,
+	       struct ptlrpc_request **request);
+int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
+		void *ea, int ealen, void *ea2, int ea2len,
+		struct ptlrpc_request **request, struct md_open_data **mod);
+int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
+	       struct ptlrpc_request **request);
+int mdc_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
+		      ldlm_policy_data_t *policy, ldlm_mode_t mode,
+		      ldlm_cancel_flags_t flags, void *opaque);
+
+static inline void mdc_set_capa_size(struct ptlrpc_request *req,
+				     const struct req_msg_field *field,
+				     struct obd_capa *oc)
+{
+	if (oc == NULL)
+		req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
+	else
+		/* it is already calculated as sizeof struct obd_capa */
+		;
+}
+
+int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
+			struct lu_fid *fid, __u64 *bits);
+
+int mdc_intent_getattr_async(struct obd_export *exp,
+			     struct md_enqueue_info *minfo,
+			     struct ldlm_enqueue_info *einfo);
+
+ldlm_mode_t mdc_lock_match(struct obd_export *exp, __u64 flags,
+			   const struct lu_fid *fid, ldlm_type_t type,
+			   ldlm_policy_data_t *policy, ldlm_mode_t mode,
+			   struct lustre_handle *lockh);
+
+static inline int mdc_prep_elc_req(struct obd_export *exp,
+				   struct ptlrpc_request *req, int opc,
+				   struct list_head *cancels, int count)
+{
+	return ldlm_prep_elc_req(exp, req, LUSTRE_MDS_VERSION, opc, 0, cancels,
+				 count);
+}
+
+#endif