lustre/lov/lov_ea.c

   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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/lov/lov_ea.c
  37  *
  38  * Author: Wang Di <wangdi@clusterfs.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LOV
  42
  43 #include <linux/math64.h>
  44 #include <libcfs/libcfs.h>
  45
  46 #include <obd_class.h>
  47 #include <lustre/lustre_idl.h>
  48
  49 #include "lov_internal.h"
  50
  51 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
  52                                  __u16 stripe_count)
  53 {
  54         if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
  55                 CERROR("bad stripe count %d\n", stripe_count);
  56                 lov_dump_lmm_common(D_WARNING, lmm);
  57                 return -EINVAL;
  58         }
  59
  60         if (lmm_oi_id(&lmm->lmm_oi) == 0) {
  61                 CERROR("zero object id\n");
  62                 lov_dump_lmm_common(D_WARNING, lmm);
  63                 return -EINVAL;
  64         }
  65
  66         if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
  67                 CERROR("bad striping pattern\n");
  68                 lov_dump_lmm_common(D_WARNING, lmm);
  69                 return -EINVAL;
  70         }
  71
  72         if (lmm->lmm_stripe_size == 0 ||
  73             (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
  74                 CERROR("bad stripe size %u\n",
  75                        le32_to_cpu(lmm->lmm_stripe_size));
  76                 lov_dump_lmm_common(D_WARNING, lmm);
  77                 return -EINVAL;
  78         }
  79         return 0;
  80 }
  81
  82 struct lov_stripe_md *lsm_alloc_plain(u16 stripe_count)
  83 {
  84         struct lov_stripe_md *lsm;
  85         struct lov_oinfo     *loi;
  86         size_t lsm_size;
  87         size_t oinfo_ptrs_size;
  88         unsigned int i;
  89
  90         LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
  91
  92         oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
  93         lsm_size = sizeof(*lsm) + oinfo_ptrs_size;
  94
  95         OBD_ALLOC_LARGE(lsm, lsm_size);
  96         if (!lsm)
  97                 return NULL;
  98
  99         for (i = 0; i < stripe_count; i++) {
 100                 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
 101                 if (loi == NULL)
 102                         goto err;
 103                 lsm->lsm_oinfo[i] = loi;
 104         }
 105         lsm->lsm_stripe_count = stripe_count;
 106         return lsm;
 107
 108 err:
 109         while (--i >= 0)
 110                 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
 111
 112         OBD_FREE_LARGE(lsm, lsm_size);
 113
 114         return NULL;
 115 }
 116
 117 void lsm_free_plain(struct lov_stripe_md *lsm)
 118 {
 119         __u16 stripe_count = lsm->lsm_stripe_count;
 120         int i;
 121
 122         for (i = 0; i < stripe_count; i++)
 123                 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
 124                               sizeof(struct lov_oinfo));
 125         OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
 126                        stripe_count * sizeof(struct lov_oinfo *));
 127 }
 128
 129 /* Find minimum stripe maxbytes value.  For inactive or
 130  * reconnecting targets use LUSTRE_EXT3_STRIPE_MAXBYTES. */
 131 static loff_t lov_tgt_maxbytes(struct lov_tgt_desc *tgt)
 132 {
 133         struct obd_import *imp;
 134         loff_t maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
 135
 136         if (!tgt->ltd_active)
 137                 return maxbytes;
 138
 139         imp = tgt->ltd_obd->u.cli.cl_import;
 140         if (imp == NULL)
 141                 return maxbytes;
 142
 143         spin_lock(&imp->imp_lock);
 144         if (imp->imp_state == LUSTRE_IMP_FULL &&
 145             (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
 146             imp->imp_connect_data.ocd_maxbytes > 0)
 147                 maxbytes = imp->imp_connect_data.ocd_maxbytes;
 148
 149         spin_unlock(&imp->imp_lock);
 150
 151         return maxbytes;
 152 }
 153
 154 static int lsm_unpackmd_common(struct lov_obd *lov,
 155                                struct lov_stripe_md *lsm,
 156                                struct lov_mds_md *lmm,
 157                                struct lov_ost_data_v1 *objects)
 158 {
 159         struct lov_oinfo *loi;
 160         loff_t stripe_maxbytes = LLONG_MAX;
 161         unsigned int stripe_count;
 162         unsigned int i;
 163
 164         /*
 165          * This supposes lov_mds_md_v1/v3 first fields are
 166          * are the same
 167          */
 168         lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
 169         lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 170         lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
 171         lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 172         lsm->lsm_pool_name[0] = '\0';
 173
 174         stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
 175
 176         for (i = 0; i < stripe_count; i++) {
 177                 loi = lsm->lsm_oinfo[i];
 178                 ostid_le_to_cpu(&objects[i].l_ost_oi, &loi->loi_oi);
 179                 loi->loi_ost_idx = le32_to_cpu(objects[i].l_ost_idx);
 180                 loi->loi_ost_gen = le32_to_cpu(objects[i].l_ost_gen);
 181                 if (lov_oinfo_is_dummy(loi))
 182                         continue;
 183
 184                 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
 185                         CERROR("OST index %d more than OST count %d\n",
 186                                loi->loi_ost_idx, lov->desc.ld_tgt_count);
 187                         lov_dump_lmm_v1(D_WARNING, lmm);
 188                         return -EINVAL;
 189                 }
 190
 191                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
 192                         CERROR("OST index %d missing\n", loi->loi_ost_idx);
 193                         lov_dump_lmm_v1(D_WARNING, lmm);
 194                         return -EINVAL;
 195                 }
 196
 197                 stripe_maxbytes = min_t(loff_t, stripe_maxbytes,
 198                                         lov_tgt_maxbytes(
 199                                         lov->lov_tgts[loi->loi_ost_idx]));
 200         }
 201
 202         if (stripe_maxbytes == LLONG_MAX)
 203                 stripe_maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
 204
 205         if (lsm->lsm_stripe_count == 0)
 206                 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
 207         else
 208                 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
 209
 210         return 0;
 211 }
 212
 213 static void
 214 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
 215                           loff_t *lov_off, loff_t *swidth)
 216 {
 217         if (swidth != NULL)
 218                 *swidth = (loff_t)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
 219 }
 220
 221 static void
 222 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
 223                            loff_t *lov_off, loff_t *swidth)
 224 {
 225         if (swidth != NULL)
 226                 *swidth = (loff_t)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
 227 }
 228
 229 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
 230                              __u16 *stripe_count)
 231 {
 232         if (lmm_bytes < sizeof(*lmm)) {
 233                 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
 234                        lmm_bytes, (int)sizeof(*lmm));
 235                 return -EINVAL;
 236         }
 237
 238         *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 239         if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 240                 *stripe_count = 0;
 241
 242         if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
 243                 CERROR("LOV EA V1 too small: %d, need %d\n",
 244                        lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
 245                 lov_dump_lmm_common(D_WARNING, lmm);
 246                 return -EINVAL;
 247         }
 248
 249         return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
 250 }
 251
 252 static int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
 253                            struct lov_mds_md_v1 *lmm)
 254 {
 255         return lsm_unpackmd_common(lov, lsm, lmm, lmm->lmm_objects);
 256 }
 257
 258 const struct lsm_operations lsm_v1_ops = {
 259         .lsm_free            = lsm_free_plain,
 260         .lsm_stripe_by_index    = lsm_stripe_by_index_plain,
 261         .lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
 262         .lsm_lmm_verify         = lsm_lmm_verify_v1,
 263         .lsm_unpackmd           = lsm_unpackmd_v1,
 264 };
 265
 266 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
 267                              __u16 *stripe_count)
 268 {
 269         struct lov_mds_md_v3 *lmm;
 270
 271         lmm = (struct lov_mds_md_v3 *)lmmv1;
 272
 273         if (lmm_bytes < sizeof(*lmm)) {
 274                 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
 275                        lmm_bytes, (int)sizeof(*lmm));
 276                 return -EINVAL;
 277         }
 278
 279         *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 280         if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 281                 *stripe_count = 0;
 282
 283         if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
 284                 CERROR("LOV EA V3 too small: %d, need %d\n",
 285                        lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
 286                 lov_dump_lmm_common(D_WARNING, lmm);
 287                 return -EINVAL;
 288         }
 289
 290         return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
 291                                      *stripe_count);
 292 }
 293
 294 static int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
 295                            struct lov_mds_md *lmm)
 296 {
 297         struct lov_mds_md_v3 *lmm_v3 = (struct lov_mds_md_v3 *)lmm;
 298         size_t cplen;
 299         int rc;
 300
 301         rc = lsm_unpackmd_common(lov, lsm, lmm, lmm_v3->lmm_objects);
 302         if (rc != 0)
 303                 return rc;
 304
 305         cplen = strlcpy(lsm->lsm_pool_name, lmm_v3->lmm_pool_name,
 306                         sizeof(lsm->lsm_pool_name));
 307         if (cplen >= sizeof(lsm->lsm_pool_name))
 308                 return -E2BIG;
 309
 310         return 0;
 311 }
 312
 313 const struct lsm_operations lsm_v3_ops = {
 314         .lsm_free            = lsm_free_plain,
 315         .lsm_stripe_by_index    = lsm_stripe_by_index_plain,
 316         .lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
 317         .lsm_lmm_verify         = lsm_lmm_verify_v3,
 318         .lsm_unpackmd           = lsm_unpackmd_v3,
 319 };
 320
 321 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
 322 {
 323         CDEBUG(level, "lsm %p, objid "DOSTID", maxbytes "LPX64", magic 0x%08X,"
 324                " stripe_size %u, stripe_count %u, refc: %d,"
 325                " layout_gen %u, pool ["LOV_POOLNAMEF"]\n", lsm,
 326                POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
 327                lsm->lsm_stripe_size, lsm->lsm_stripe_count,
 328                atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,
 329                lsm->lsm_pool_name);
 330 }