lustre/include/lustre_lmv.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2013, Intel Corporation.
  24  */
  25 /*
  26  * lustre/include/lustre_lmv.h
  27  *
  28  * Lustre LMV structures and functions.
  29  *
  30  * Author: Di Wang <di.wang@intel.com>
  31  */
  32
  33 #ifndef _LUSTRE_LMV_H
  34 #define _LUSTRE_LMV_H
  35 #include <lustre/lustre_idl.h>
  36
  37 struct lmv_oinfo {
  38         struct lu_fid   lmo_fid;
  39         mdsno_t         lmo_mds;
  40         struct inode    *lmo_root;
  41 };
  42
  43 struct lmv_stripe_md {
  44         __u32   lsm_md_magic;
  45         __u32   lsm_md_stripe_count;
  46         __u32   lsm_md_master_mdt_index;
  47         __u32   lsm_md_hash_type;
  48         __u32   lsm_md_layout_version;
  49         __u32   lsm_md_default_count;
  50         __u32   lsm_md_default_index;
  51         char    lsm_md_pool_name[LOV_MAXPOOLNAME];
  52         struct lmv_oinfo lsm_md_oinfo[0];
  53 };
  54
  55 union lmv_mds_md;
  56
  57 int lmv_pack_md(union lmv_mds_md **lmmp, const struct lmv_stripe_md *lsm,
  58                        int stripe_count);
  59 int lmv_alloc_md(union lmv_mds_md **lmmp, int stripe_count);
  60 void lmv_free_md(union lmv_mds_md *lmm);
  61 int lmv_alloc_memmd(struct lmv_stripe_md **lsmp, int stripe_count);
  62 void lmv_free_memmd(struct lmv_stripe_md *lsm);
  63
  64 static inline void lmv1_cpu_to_le(struct lmv_mds_md_v1 *lmv_dst,
  65                                   const struct lmv_mds_md_v1 *lmv_src)
  66 {
  67         int i;
  68
  69         lmv_dst->lmv_magic = cpu_to_le32(lmv_src->lmv_magic);
  70         lmv_dst->lmv_stripe_count = cpu_to_le32(lmv_src->lmv_stripe_count);
  71         lmv_dst->lmv_master_mdt_index =
  72                         cpu_to_le32(lmv_src->lmv_master_mdt_index);
  73         lmv_dst->lmv_hash_type = cpu_to_le32(lmv_src->lmv_hash_type);
  74         lmv_dst->lmv_layout_version = cpu_to_le32(lmv_src->lmv_layout_version);
  75         for (i = 0; i < lmv_src->lmv_stripe_count; i++)
  76                 fid_cpu_to_le(&lmv_dst->lmv_stripe_fids[i],
  77                               &lmv_src->lmv_stripe_fids[i]);
  78 }
  79
  80 static inline void lmv1_le_to_cpu(struct lmv_mds_md_v1 *lmv_dst,
  81                                   const struct lmv_mds_md_v1 *lmv_src)
  82 {
  83         int i;
  84
  85         lmv_dst->lmv_magic = le32_to_cpu(lmv_src->lmv_magic);
  86         lmv_dst->lmv_stripe_count = le32_to_cpu(lmv_src->lmv_stripe_count);
  87         lmv_dst->lmv_master_mdt_index =
  88                                 le32_to_cpu(lmv_src->lmv_master_mdt_index);
  89         lmv_dst->lmv_hash_type = le32_to_cpu(lmv_src->lmv_hash_type);
  90         lmv_dst->lmv_layout_version = le32_to_cpu(lmv_src->lmv_layout_version);
  91         for (i = 0; i < lmv_src->lmv_stripe_count; i++)
  92                 fid_le_to_cpu(&lmv_dst->lmv_stripe_fids[i],
  93                               &lmv_src->lmv_stripe_fids[i]);
  94 }
  95
  96 static inline void lmv_cpu_to_le(union lmv_mds_md *lmv_dst,
  97                                  const union lmv_mds_md *lmv_src)
  98 {
  99         switch (lmv_src->lmv_magic) {
 100         case LMV_MAGIC_V1:
 101         case LMV_MAGIC_MIGRATE: {
 102                 lmv1_cpu_to_le(&lmv_dst->lmv_md_v1, &lmv_src->lmv_md_v1);
 103                 break;
 104         }
 105         default:
 106                 break;
 107         }
 108 }
 109
 110 static inline void lmv_le_to_cpu(union lmv_mds_md *lmv_dst,
 111                                  const union lmv_mds_md *lmv_src)
 112 {
 113         switch (le32_to_cpu(lmv_src->lmv_magic)) {
 114         case LMV_MAGIC_V1:
 115         case LMV_MAGIC_MIGRATE: {
 116                 lmv1_le_to_cpu(&lmv_dst->lmv_md_v1, &lmv_src->lmv_md_v1);
 117                 break;
 118         }
 119         default:
 120                 break;
 121         }
 122 }
 123
 124 #endif