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, 2013, 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 #ifdef __KERNEL__
  44 #include <linux/math64.h>
  45 #include <libcfs/libcfs.h>
  46 #else
  47 #include <liblustre.h>
  48 #endif
  49
  50 #include <obd_class.h>
  51 #include <lustre/lustre_idl.h>
  52
  53 #include "lov_internal.h"
  54
  55 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
  56                                  __u16 stripe_count)
  57 {
  58         if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
  59                 CERROR("bad stripe count %d\n", stripe_count);
  60                 lov_dump_lmm_common(D_WARNING, lmm);
  61                 return -EINVAL;
  62         }
  63
  64         if (lmm_oi_id(&lmm->lmm_oi) == 0) {
  65                 CERROR("zero object id\n");
  66                 lov_dump_lmm_common(D_WARNING, lmm);
  67                 return -EINVAL;
  68         }
  69
  70         if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
  71                 CERROR("bad striping pattern\n");
  72                 lov_dump_lmm_common(D_WARNING, lmm);
  73                 return -EINVAL;
  74         }
  75
  76         if (lmm->lmm_stripe_size == 0 ||
  77             (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
  78                 CERROR("bad stripe size %u\n",
  79                        le32_to_cpu(lmm->lmm_stripe_size));
  80                 lov_dump_lmm_common(D_WARNING, lmm);
  81                 return -EINVAL;
  82         }
  83         return 0;
  84 }
  85
  86 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
  87 {
  88         struct lov_stripe_md *lsm;
  89         struct lov_oinfo     *loi;
  90         int                   i, oinfo_ptrs_size;
  91
  92         LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
  93
  94         oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
  95         *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
  96
  97         OBD_ALLOC_LARGE(lsm, *size);
  98         if (!lsm)
  99                 return NULL;
 100
 101         for (i = 0; i < stripe_count; i++) {
 102                 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
 103                 if (loi == NULL)
 104                         goto err;
 105                 lsm->lsm_oinfo[i] = loi;
 106         }
 107         lsm->lsm_stripe_count = stripe_count;
 108         return lsm;
 109
 110 err:
 111         while (--i >= 0)
 112                 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
 113         OBD_FREE_LARGE(lsm, *size);
 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 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
 130                                 struct lov_mds_md *lmm)
 131 {
 132         /*
 133          * This supposes lov_mds_md_v1/v3 first fields are
 134          * are the same
 135          */
 136         lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
 137         lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 138         lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
 139         lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 140         lsm->lsm_pool_name[0] = '\0';
 141 }
 142
 143 static void
 144 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
 145                            obd_off *lov_off, obd_off *swidth)
 146 {
 147         if (swidth)
 148                 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
 149 }
 150
 151 static void
 152 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
 153                            obd_off *lov_off, obd_off *swidth)
 154 {
 155         if (swidth)
 156                 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
 157 }
 158
 159 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
 160                              struct obd_export *md_exp)
 161 {
 162         return 0;
 163 }
 164
 165 /* Find minimum stripe maxbytes value.  For inactive or
 166  * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
 167 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
 168 {
 169         struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
 170
 171         if (imp == NULL || !tgt->ltd_active) {
 172                 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
 173                 return;
 174         }
 175
 176         spin_lock(&imp->imp_lock);
 177         if (imp->imp_state == LUSTRE_IMP_FULL &&
 178             (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
 179             imp->imp_connect_data.ocd_maxbytes > 0) {
 180                 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
 181                         *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
 182         } else {
 183                 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
 184         }
 185         spin_unlock(&imp->imp_lock);
 186 }
 187
 188 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
 189                              __u16 *stripe_count)
 190 {
 191         if (lmm_bytes < sizeof(*lmm)) {
 192                 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
 193                        lmm_bytes, (int)sizeof(*lmm));
 194                 return -EINVAL;
 195         }
 196
 197         *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 198         if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 199                 *stripe_count = 0;
 200
 201         if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
 202                 CERROR("LOV EA V1 too small: %d, need %d\n",
 203                        lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
 204                 lov_dump_lmm_common(D_WARNING, lmm);
 205                 return -EINVAL;
 206         }
 207
 208         return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
 209 }
 210
 211 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
 212                     struct lov_mds_md_v1 *lmm)
 213 {
 214         struct lov_oinfo *loi;
 215         int i;
 216         int stripe_count;
 217         __u64 stripe_maxbytes = OBD_OBJECT_EOF;
 218
 219         lsm_unpackmd_common(lsm, lmm);
 220
 221         stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
 222
 223         for (i = 0; i < stripe_count; i++) {
 224                 /* XXX LOV STACKING call down to osc_unpackmd() */
 225                 loi = lsm->lsm_oinfo[i];
 226                 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
 227                 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
 228                 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
 229                 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
 230                         CERROR("OST index %d more than OST count %d\n",
 231                                loi->loi_ost_idx, lov->desc.ld_tgt_count);
 232                         lov_dump_lmm_v1(D_WARNING, lmm);
 233                         return -EINVAL;
 234                 }
 235                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
 236                         CERROR("OST index %d missing\n", loi->loi_ost_idx);
 237                         lov_dump_lmm_v1(D_WARNING, lmm);
 238                         return -EINVAL;
 239                 }
 240                 /* calculate the minimum stripe max bytes */
 241                 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
 242                                  &stripe_maxbytes);
 243         }
 244
 245         lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
 246         if (lsm->lsm_stripe_count == 0)
 247                 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
 248
 249         return 0;
 250 }
 251
 252 const struct lsm_operations lsm_v1_ops = {
 253         .lsm_free            = lsm_free_plain,
 254         .lsm_destroy         = lsm_destroy_plain,
 255         .lsm_stripe_by_index    = lsm_stripe_by_index_plain,
 256         .lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
 257         .lsm_lmm_verify         = lsm_lmm_verify_v1,
 258         .lsm_unpackmd           = lsm_unpackmd_v1,
 259 };
 260
 261 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
 262                              __u16 *stripe_count)
 263 {
 264         struct lov_mds_md_v3 *lmm;
 265
 266         lmm = (struct lov_mds_md_v3 *)lmmv1;
 267
 268         if (lmm_bytes < sizeof(*lmm)) {
 269                 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
 270                        lmm_bytes, (int)sizeof(*lmm));
 271                 return -EINVAL;
 272         }
 273
 274         *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 275         if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 276                 *stripe_count = 0;
 277
 278         if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
 279                 CERROR("LOV EA V3 too small: %d, need %d\n",
 280                        lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
 281                 lov_dump_lmm_common(D_WARNING, lmm);
 282                 return -EINVAL;
 283         }
 284
 285         return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
 286                                      *stripe_count);
 287 }
 288
 289 int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
 290                     struct lov_mds_md *lmmv1)
 291 {
 292         struct lov_mds_md_v3 *lmm;
 293         struct lov_oinfo *loi;
 294         int i;
 295         int stripe_count;
 296         __u64 stripe_maxbytes = OBD_OBJECT_EOF;
 297         int cplen = 0;
 298
 299         lmm = (struct lov_mds_md_v3 *)lmmv1;
 300
 301         lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
 302
 303         stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
 304
 305         cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name,
 306                         sizeof(lsm->lsm_pool_name));
 307         if (cplen >= sizeof(lsm->lsm_pool_name))
 308                 return -E2BIG;
 309
 310         for (i = 0; i < stripe_count; i++) {
 311                 /* XXX LOV STACKING call down to osc_unpackmd() */
 312                 loi = lsm->lsm_oinfo[i];
 313                 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
 314                 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
 315                 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
 316                 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
 317                         CERROR("OST index %d more than OST count %d\n",
 318                                loi->loi_ost_idx, lov->desc.ld_tgt_count);
 319                         lov_dump_lmm_v3(D_WARNING, lmm);
 320                         return -EINVAL;
 321                 }
 322                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
 323                         CERROR("OST index %d missing\n", loi->loi_ost_idx);
 324                         lov_dump_lmm_v3(D_WARNING, lmm);
 325                         return -EINVAL;
 326                 }
 327                 /* calculate the minimum stripe max bytes */
 328                 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
 329                                  &stripe_maxbytes);
 330         }
 331
 332         lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
 333         if (lsm->lsm_stripe_count == 0)
 334                 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
 335
 336         return 0;
 337 }
 338
 339 const struct lsm_operations lsm_v3_ops = {
 340         .lsm_free            = lsm_free_plain,
 341         .lsm_destroy         = lsm_destroy_plain,
 342         .lsm_stripe_by_index    = lsm_stripe_by_index_plain,
 343         .lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
 344         .lsm_lmm_verify         = lsm_lmm_verify_v3,
 345         .lsm_unpackmd           = lsm_unpackmd_v3,
 346 };
 347
 348 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
 349 {
 350         CDEBUG(level, "lsm %p, objid "DOSTID", maxbytes "LPX64", magic 0x%08X,"
 351                " stripe_size %u, stripe_count %u, refc: %d,"
 352                " layout_gen %u, pool ["LOV_POOLNAMEF"]\n", lsm,
 353                POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
 354                lsm->lsm_stripe_size, lsm->lsm_stripe_count,
 355                atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,
 356                lsm->lsm_pool_name);
 357 }