Merge remote-tracking branch 'staging/staging-next'

[deliverable/linux.git] / drivers / staging / lustre / lustre / include / lustre_lmv.h

diff --git a/drivers/staging/lustre/lustre/include/lustre_lmv.h b/drivers/staging/lustre/lustre/include/lustre_lmv.h
new file mode 100644 (file)
index 0000000..085e596
--- /dev/null
+++ b/drivers/staging/lustre/lustre/include/lustre_lmv.h
@@ -0,0 +1,121 @@
+/*
+ * 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 COPYING 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
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2013, Intel Corporation.
+ */
+/*
+ * lustre/include/lustre_lmv.h
+ *
+ * Lustre LMV structures and functions.
+ *
+ * Author: Di Wang <di.wang@intel.com>
+ */
+
+#ifndef _LUSTRE_LMV_H
+#define _LUSTRE_LMV_H
+#include "lustre/lustre_idl.h"
+
+struct lmv_oinfo {
+       struct lu_fid   lmo_fid;
+       u32             lmo_mds;
+       struct inode    *lmo_root;
+};
+
+struct lmv_stripe_md {
+       __u32   lsm_md_magic;
+       __u32   lsm_md_stripe_count;
+       __u32   lsm_md_master_mdt_index;
+       __u32   lsm_md_hash_type;
+       __u32   lsm_md_layout_version;
+       __u32   lsm_md_default_count;
+       __u32   lsm_md_default_index;
+       char    lsm_md_pool_name[LOV_MAXPOOLNAME];
+       struct lmv_oinfo lsm_md_oinfo[0];
+};
+
+static inline bool
+lsm_md_eq(const struct lmv_stripe_md *lsm1, const struct lmv_stripe_md *lsm2)
+{
+       int idx;
+
+       if (lsm1->lsm_md_magic != lsm2->lsm_md_magic ||
+           lsm1->lsm_md_stripe_count != lsm2->lsm_md_stripe_count ||
+           lsm1->lsm_md_master_mdt_index != lsm2->lsm_md_master_mdt_index ||
+           lsm1->lsm_md_hash_type != lsm2->lsm_md_hash_type ||
+           lsm1->lsm_md_layout_version != lsm2->lsm_md_layout_version ||
+           !strcmp(lsm1->lsm_md_pool_name, lsm2->lsm_md_pool_name))
+               return false;
+
+       for (idx = 0; idx < lsm1->lsm_md_stripe_count; idx++) {
+               if (!lu_fid_eq(&lsm1->lsm_md_oinfo[idx].lmo_fid,
+                              &lsm2->lsm_md_oinfo[idx].lmo_fid))
+                       return false;
+       }
+
+       return true;
+}
+
+union lmv_mds_md;
+
+int lmv_unpack_md(struct obd_export *exp, struct lmv_stripe_md **lsmp,
+                 const union lmv_mds_md *lmm, int stripe_count);
+
+static inline int lmv_alloc_memmd(struct lmv_stripe_md **lsmp, int stripe_count)
+{
+       return lmv_unpack_md(NULL, lsmp, NULL, stripe_count);
+}
+
+static inline void lmv_free_memmd(struct lmv_stripe_md *lsm)
+{
+       lmv_unpack_md(NULL, &lsm, NULL, 0);
+}
+
+static inline void lmv1_le_to_cpu(struct lmv_mds_md_v1 *lmv_dst,
+                                 const struct lmv_mds_md_v1 *lmv_src)
+{
+       int i;
+
+       lmv_dst->lmv_magic = le32_to_cpu(lmv_src->lmv_magic);
+       lmv_dst->lmv_stripe_count = le32_to_cpu(lmv_src->lmv_stripe_count);
+       lmv_dst->lmv_master_mdt_index =
+               le32_to_cpu(lmv_src->lmv_master_mdt_index);
+       lmv_dst->lmv_hash_type = le32_to_cpu(lmv_src->lmv_hash_type);
+       lmv_dst->lmv_layout_version = le32_to_cpu(lmv_src->lmv_layout_version);
+
+       for (i = 0; i < lmv_src->lmv_stripe_count; i++)
+               fid_le_to_cpu(&lmv_dst->lmv_stripe_fids[i],
+                             &lmv_src->lmv_stripe_fids[i]);
+}
+
+static inline void lmv_le_to_cpu(union lmv_mds_md *lmv_dst,
+                                const union lmv_mds_md *lmv_src)
+{
+       switch (le32_to_cpu(lmv_src->lmv_magic)) {
+       case LMV_MAGIC_V1:
+               lmv1_le_to_cpu(&lmv_dst->lmv_md_v1, &lmv_src->lmv_md_v1);
+               break;
+       default:
+               break;
+       }
+}
+
+#endif