Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / include / lustre_fld.h

diff --git a/kernel/drivers/staging/lustre/lustre/include/lustre_fld.h b/kernel/drivers/staging/lustre/lustre/include/lustre_fld.h
new file mode 100644 (file)
index 0000000..5ee4b1e
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/include/lustre_fld.h
@@ -0,0 +1,160 @@
+/*
+ * 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, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#ifndef __LINUX_FLD_H
+#define __LINUX_FLD_H
+
+/** \defgroup fld fld
+ *
+ * @{
+ */
+
+#include "lustre/lustre_idl.h"
+#include "../../include/linux/libcfs/libcfs.h"
+
+struct lu_client_fld;
+struct lu_server_fld;
+struct lu_fld_hash;
+struct fld_cache;
+
+extern const struct dt_index_features fld_index_features;
+extern const char fld_index_name[];
+
+/*
+ * FLD (Fid Location Database) interface.
+ */
+enum {
+       LUSTRE_CLI_FLD_HASH_DHT = 0,
+       LUSTRE_CLI_FLD_HASH_RRB
+};
+
+
+struct lu_fld_target {
+       struct list_head               ft_chain;
+       struct obd_export       *ft_exp;
+       struct lu_server_fld    *ft_srv;
+       __u64               ft_idx;
+};
+
+struct lu_server_fld {
+       /**
+        * Fld dir proc entry. */
+       struct proc_dir_entry    *lsf_proc_dir;
+
+       /**
+        * /fld file object device */
+       struct dt_object        *lsf_obj;
+
+       /**
+        * super sequence controller export, needed to forward fld
+        * lookup  request. */
+       struct obd_export       *lsf_control_exp;
+
+       /**
+        * Client FLD cache. */
+       struct fld_cache        *lsf_cache;
+
+       /**
+        * Protect index modifications */
+       struct mutex            lsf_lock;
+
+       /**
+        * Fld service name in form "fld-srv-lustre-MDTXXX" */
+       char                 lsf_name[LUSTRE_MDT_MAXNAMELEN];
+
+};
+
+struct lu_client_fld {
+       /**
+        * Client side proc entry. */
+       struct proc_dir_entry    *lcf_proc_dir;
+
+       /**
+        * List of exports client FLD knows about. */
+       struct list_head               lcf_targets;
+
+       /**
+        * Current hash to be used to chose an export. */
+       struct lu_fld_hash      *lcf_hash;
+
+       /**
+        * Exports count. */
+       int                   lcf_count;
+
+       /**
+        * Lock protecting exports list and fld_hash. */
+       spinlock_t               lcf_lock;
+
+       /**
+        * Client FLD cache. */
+       struct fld_cache        *lcf_cache;
+
+       /**
+        * Client fld proc entry name. */
+       char                 lcf_name[LUSTRE_MDT_MAXNAMELEN];
+
+       int                   lcf_flags;
+};
+
+/* Client methods */
+int fld_client_init(struct lu_client_fld *fld,
+                   const char *prefix, int hash);
+
+void fld_client_fini(struct lu_client_fld *fld);
+
+void fld_client_flush(struct lu_client_fld *fld);
+
+int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
+                     __u32 flags, const struct lu_env *env);
+
+int fld_client_create(struct lu_client_fld *fld,
+                     struct lu_seq_range *range,
+                     const struct lu_env *env);
+
+int fld_client_delete(struct lu_client_fld *fld, u64 seq,
+                     const struct lu_env *env);
+
+int fld_client_add_target(struct lu_client_fld *fld,
+                         struct lu_fld_target *tar);
+
+int fld_client_del_target(struct lu_client_fld *fld,
+                         __u64 idx);
+
+void fld_client_proc_fini(struct lu_client_fld *fld);
+
+/** @} fld */
+
+#endif