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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/lov/lov_ea.c
  33  *
  34  * Author: Wang Di <wangdi@clusterfs.com>
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LOV
  38
  39 #include <linux/math64.h>
  40 #include <linux/sort.h>
  41 #include <libcfs/libcfs.h>
  42
  43 #include <obd_class.h>
  44 #include "lov_internal.h"
  45
  46 static inline void
  47 lu_extent_le_to_cpu(struct lu_extent *dst, const struct lu_extent *src)
  48 {
  49         dst->e_start = le64_to_cpu(src->e_start);
  50         dst->e_end = le64_to_cpu(src->e_end);
  51 }
  52
  53 /*
  54  * Find minimum stripe maxbytes value.  For inactive or
  55  * reconnecting targets use LUSTRE_EXT3_STRIPE_MAXBYTES.
  56  */
  57 static loff_t lov_tgt_maxbytes(struct lov_tgt_desc *tgt)
  58 {
  59         struct obd_import *imp;
  60         loff_t maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
  61
  62         if (!tgt->ltd_active)
  63                 return maxbytes;
  64
  65         imp = tgt->ltd_obd->u.cli.cl_import;
  66         if (!imp)
  67                 return maxbytes;
  68
  69         spin_lock(&imp->imp_lock);
  70         if ((imp->imp_state == LUSTRE_IMP_FULL ||
  71             imp->imp_state == LUSTRE_IMP_IDLE) &&
  72             (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
  73             imp->imp_connect_data.ocd_maxbytes > 0)
  74                 maxbytes = imp->imp_connect_data.ocd_maxbytes;
  75
  76         spin_unlock(&imp->imp_lock);
  77
  78         return maxbytes;
  79 }
  80
  81 static int lsm_lmm_verify_v1v3(struct lov_mds_md *lmm, size_t lmm_size,
  82                                u16 stripe_count)
  83 {
  84         u32 pattern = le32_to_cpu(lmm->lmm_pattern);
  85         int rc = 0;
  86
  87         if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
  88                 rc = -EINVAL;
  89                 CERROR("lov: bad stripe count %d: rc = %d\n",
  90                        stripe_count, rc);
  91                 lov_dump_lmm_common(D_WARNING, lmm);
  92                 goto out;
  93         }
  94
  95         if (lmm_oi_id(&lmm->lmm_oi) == 0) {
  96                 rc = -EINVAL;
  97                 CERROR("lov: zero object id: rc = %d\n", rc);
  98                 lov_dump_lmm_common(D_WARNING, lmm);
  99                 goto out;
 100         }
 101
 102         if (!lov_pattern_supported(lov_pattern(pattern))) {
 103                 rc = -EINVAL;
 104                 CERROR("lov: unrecognized striping pattern: rc = %d\n", rc);
 105                 lov_dump_lmm_common(D_WARNING, lmm);
 106                 goto out;
 107         }
 108
 109         if (lmm->lmm_stripe_size == 0 ||
 110             (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
 111                 rc = -EINVAL;
 112                 CERROR("lov: bad stripe size %u: rc = %d\n",
 113                        le32_to_cpu(lmm->lmm_stripe_size), rc);
 114                 lov_dump_lmm_common(D_WARNING, lmm);
 115                 goto out;
 116         }
 117
 118 out:
 119         return rc;
 120 }
 121
 122 static void lsme_free(struct lov_stripe_md_entry *lsme)
 123 {
 124         unsigned int stripe_count = lsme->lsme_stripe_count;
 125         unsigned int i;
 126         size_t lsme_size;
 127
 128         if (!lsme_inited(lsme) ||
 129             lsme->lsme_pattern & LOV_PATTERN_F_RELEASED)
 130                 stripe_count = 0;
 131         for (i = 0; i < stripe_count; i++)
 132                 OBD_SLAB_FREE_PTR(lsme->lsme_oinfo[i], lov_oinfo_slab);
 133
 134         lsme_size = offsetof(typeof(*lsme), lsme_oinfo[stripe_count]);
 135         OBD_FREE_LARGE(lsme, lsme_size);
 136 }
 137
 138 void lsm_free(struct lov_stripe_md *lsm)
 139 {
 140         unsigned int entry_count = lsm->lsm_entry_count;
 141         unsigned int i;
 142         size_t lsm_size;
 143
 144         if (lsm->lsm_magic == LOV_MAGIC_FOREIGN) {
 145                 OBD_FREE_LARGE(lsm_foreign(lsm), lsm->lsm_foreign_size);
 146         } else {
 147                 for (i = 0; i < entry_count; i++)
 148                         lsme_free(lsm->lsm_entries[i]);
 149         }
 150
 151         lsm_size = lsm->lsm_magic == LOV_MAGIC_FOREIGN ?
 152                    offsetof(typeof(*lsm), lsm_entries[1]) :
 153                    offsetof(typeof(*lsm), lsm_entries[entry_count]);
 154         OBD_FREE(lsm, lsm_size);
 155 }
 156
 157 /**
 158  * Unpack a struct lov_mds_md into a struct lov_stripe_md_entry.
 159  *
 160  * The caller should set id and extent.
 161  */
 162 static struct lov_stripe_md_entry *
 163 lsme_unpack(struct lov_obd *lov, struct lov_mds_md *lmm, size_t buf_size,
 164             const char *pool_name, bool inited, struct lov_ost_data_v1 *objects,
 165             loff_t *maxbytes)
 166 {
 167         struct lov_stripe_md_entry *lsme;
 168         size_t lsme_size;
 169         loff_t min_stripe_maxbytes = 0;
 170         loff_t lov_bytes;
 171         u32 magic;
 172         u32 pattern;
 173         unsigned int stripe_count;
 174         unsigned int i;
 175         int rc;
 176
 177         magic = le32_to_cpu(lmm->lmm_magic);
 178         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 179                 RETURN(ERR_PTR(-EINVAL));
 180
 181         pattern = le32_to_cpu(lmm->lmm_pattern);
 182         if (pattern & LOV_PATTERN_F_RELEASED || !inited)
 183                 stripe_count = 0;
 184         else
 185                 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 186
 187         if (buf_size < (magic == LOV_MAGIC_V1 ? sizeof(struct lov_mds_md_v1) :
 188                                                 sizeof(struct lov_mds_md_v3))) {
 189                 CERROR("LOV EA %s too small: %zu, need %u\n",
 190                        magic == LOV_MAGIC_V1 ? "V1" : "V3", buf_size,
 191                        lov_mds_md_size(stripe_count, magic == LOV_MAGIC_V1 ?
 192                                        LOV_MAGIC_V1 : LOV_MAGIC_V3));
 193                 lov_dump_lmm_common(D_WARNING, lmm);
 194                 return ERR_PTR(-EINVAL);
 195         }
 196
 197         rc = lsm_lmm_verify_v1v3(lmm, buf_size, stripe_count);
 198         if (rc < 0)
 199                 return ERR_PTR(rc);
 200
 201         lsme_size = offsetof(typeof(*lsme), lsme_oinfo[stripe_count]);
 202         OBD_ALLOC_LARGE(lsme, lsme_size);
 203         if (!lsme)
 204                 RETURN(ERR_PTR(-ENOMEM));
 205
 206         lsme->lsme_magic = magic;
 207         lsme->lsme_pattern = pattern;
 208         lsme->lsme_flags = 0;
 209         lsme->lsme_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 210         /* preserve the possible -1 stripe count for uninstantiated component */
 211         lsme->lsme_stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 212         lsme->lsme_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 213
 214         if (pool_name) {
 215                 size_t pool_name_len;
 216
 217                 pool_name_len = strlcpy(lsme->lsme_pool_name, pool_name,
 218                                         sizeof(lsme->lsme_pool_name));
 219                 if (pool_name_len >= sizeof(lsme->lsme_pool_name))
 220                         GOTO(out_lsme, rc = -E2BIG);
 221         }
 222
 223         /* with Data-on-MDT set maxbytes to stripe size */
 224         if (lsme_is_dom(lsme)) {
 225                 if (maxbytes) {
 226                         lov_bytes = lsme->lsme_stripe_size;
 227                         goto out_dom1;
 228                 } else {
 229                         goto out_dom2;
 230                 }
 231         }
 232
 233         for (i = 0; i < stripe_count; i++) {
 234                 struct lov_oinfo *loi;
 235                 struct lov_tgt_desc *ltd;
 236
 237                 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
 238                 if (!loi)
 239                         GOTO(out_lsme, rc = -ENOMEM);
 240
 241                 lsme->lsme_oinfo[i] = loi;
 242
 243                 ostid_le_to_cpu(&objects[i].l_ost_oi, &loi->loi_oi);
 244                 loi->loi_ost_idx = le32_to_cpu(objects[i].l_ost_idx);
 245                 loi->loi_ost_gen = le32_to_cpu(objects[i].l_ost_gen);
 246                 if (lov_oinfo_is_dummy(loi))
 247                         continue;
 248
 249                 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count &&
 250                     !lov2obd(lov)->obd_process_conf) {
 251                         CERROR("%s: OST index %d more than OST count %d\n",
 252                                (char*)lov->desc.ld_uuid.uuid,
 253                                loi->loi_ost_idx, lov->desc.ld_tgt_count);
 254                         lov_dump_lmm_v1(D_WARNING, lmm);
 255                         GOTO(out_lsme, rc = -EINVAL);
 256                 }
 257
 258                 ltd = lov->lov_tgts[loi->loi_ost_idx];
 259                 if (!ltd) {
 260                         CERROR("%s: OST index %d missing\n",
 261                                (char*)lov->desc.ld_uuid.uuid, loi->loi_ost_idx);
 262                         lov_dump_lmm_v1(D_WARNING, lmm);
 263                         continue;
 264                 }
 265
 266                 lov_bytes = lov_tgt_maxbytes(ltd);
 267                 if (min_stripe_maxbytes == 0 || lov_bytes < min_stripe_maxbytes)
 268                         min_stripe_maxbytes = lov_bytes;
 269         }
 270
 271         if (maxbytes) {
 272                 if (min_stripe_maxbytes == 0)
 273                         min_stripe_maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
 274
 275                 if (stripe_count == 0)
 276                         stripe_count = lov->desc.ld_tgt_count;
 277
 278                 if (min_stripe_maxbytes <= LLONG_MAX / stripe_count)
 279                         lov_bytes = min_stripe_maxbytes * stripe_count;
 280                 else
 281                         lov_bytes = MAX_LFS_FILESIZE;
 282 out_dom1:
 283                 *maxbytes = min_t(loff_t, lov_bytes, MAX_LFS_FILESIZE);
 284         }
 285 out_dom2:
 286
 287         return lsme;
 288
 289 out_lsme:
 290         for (i = 0; i < stripe_count; i++) {
 291                 struct lov_oinfo *loi = lsme->lsme_oinfo[i];
 292
 293                 if (loi)
 294                         OBD_SLAB_FREE_PTR(lsme->lsme_oinfo[i], lov_oinfo_slab);
 295         }
 296         OBD_FREE_LARGE(lsme, lsme_size);
 297
 298         return ERR_PTR(rc);
 299 }
 300
 301 static struct
 302 lov_stripe_md *lsm_unpackmd_v1v3(struct lov_obd *lov, struct lov_mds_md *lmm,
 303                                  size_t buf_size, const char *pool_name,
 304                                  struct lov_ost_data_v1 *objects)
 305 {
 306         struct lov_stripe_md *lsm;
 307         struct lov_stripe_md_entry *lsme;
 308         size_t lsm_size;
 309         loff_t maxbytes;
 310         u32 pattern;
 311         int rc;
 312
 313         pattern = le32_to_cpu(lmm->lmm_pattern);
 314
 315         lsme = lsme_unpack(lov, lmm, buf_size, pool_name, true, objects,
 316                            &maxbytes);
 317         if (IS_ERR(lsme))
 318                 RETURN(ERR_CAST(lsme));
 319
 320         lsme->lsme_flags = LCME_FL_INIT;
 321         lsme->lsme_extent.e_start = 0;
 322         lsme->lsme_extent.e_end = LUSTRE_EOF;
 323
 324         lsm_size = offsetof(typeof(*lsm), lsm_entries[1]);
 325         OBD_ALLOC(lsm, lsm_size);
 326         if (!lsm)
 327                 GOTO(out_lsme, rc = -ENOMEM);
 328
 329         atomic_set(&lsm->lsm_refc, 1);
 330         spin_lock_init(&lsm->lsm_lock);
 331         lsm->lsm_maxbytes = maxbytes;
 332         lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
 333         lsm->lsm_magic = le32_to_cpu(lmm->lmm_magic);
 334         lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 335         lsm->lsm_entry_count = 1;
 336         lsm->lsm_is_released = pattern & LOV_PATTERN_F_RELEASED;
 337         lsm->lsm_entries[0] = lsme;
 338
 339         return lsm;
 340
 341 out_lsme:
 342         lsme_free(lsme);
 343
 344         return ERR_PTR(rc);
 345 }
 346
 347 static inline struct lov_stripe_md *
 348 lsm_unpackmd_v1(struct lov_obd *lov, void *buf, size_t buf_size)
 349 {
 350         struct lov_mds_md_v1 *lmm = buf;
 351
 352         return lsm_unpackmd_v1v3(lov, buf, buf_size, NULL, lmm->lmm_objects);
 353 }
 354
 355 const struct lsm_operations lsm_v1_ops = {
 356         .lsm_unpackmd           = lsm_unpackmd_v1,
 357 };
 358
 359 static inline
 360 struct lov_stripe_md *lsm_unpackmd_v3(struct lov_obd *lov, void *buf,
 361                                       size_t buf_size)
 362 {
 363         struct lov_mds_md_v3 *lmm = buf;
 364
 365         return lsm_unpackmd_v1v3(lov, buf, buf_size, lmm->lmm_pool_name,
 366                                  lmm->lmm_objects);
 367 }
 368
 369 const struct lsm_operations lsm_v3_ops = {
 370         .lsm_unpackmd           = lsm_unpackmd_v3,
 371 };
 372
 373 static int lsm_verify_comp_md_v1(struct lov_comp_md_v1 *lcm,
 374                                  size_t lcm_buf_size)
 375 {
 376         unsigned int entry_count;
 377         unsigned int i;
 378         size_t lcm_size;
 379
 380         lcm_size = le32_to_cpu(lcm->lcm_size);
 381         if (lcm_buf_size < lcm_size) {
 382                 CERROR("bad LCM buffer size %zu, expected %zu\n",
 383                        lcm_buf_size, lcm_size);
 384                 RETURN(-EINVAL);
 385         }
 386
 387         entry_count = le16_to_cpu(lcm->lcm_entry_count);
 388         for (i = 0; i < entry_count; i++) {
 389                 struct lov_comp_md_entry_v1 *lcme = &lcm->lcm_entries[i];
 390                 size_t blob_offset;
 391                 size_t blob_size;
 392
 393                 blob_offset = le32_to_cpu(lcme->lcme_offset);
 394                 blob_size = le32_to_cpu(lcme->lcme_size);
 395
 396                 if (lcm_size < blob_offset || lcm_size < blob_size ||
 397                     lcm_size < blob_offset + blob_size) {
 398                         CERROR("LCM entry %u has invalid blob: "
 399                                "LCM size = %zu, offset = %zu, size = %zu\n",
 400                                le32_to_cpu(lcme->lcme_id),
 401                                lcm_size, blob_offset, blob_size);
 402                         RETURN(-EINVAL);
 403                 }
 404         }
 405
 406         return 0;
 407 }
 408
 409 static struct lov_stripe_md_entry *
 410 lsme_unpack_comp(struct lov_obd *lov, struct lov_mds_md *lmm,
 411                  size_t lmm_buf_size, bool inited, loff_t *maxbytes)
 412 {
 413         unsigned int magic;
 414         unsigned int stripe_count;
 415
 416         stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 417         if (stripe_count == 0 &&
 418             lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_MDT)
 419                 RETURN(ERR_PTR(-EINVAL));
 420         /* un-instantiated lmm contains no ost id info, i.e. lov_ost_data_v1 */
 421         if (!inited)
 422                 stripe_count = 0;
 423
 424         magic = le32_to_cpu(lmm->lmm_magic);
 425         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 426                 RETURN(ERR_PTR(-EINVAL));
 427
 428         if (lmm_buf_size < lov_mds_md_size(stripe_count, magic))
 429                 RETURN(ERR_PTR(-EINVAL));
 430
 431         if (magic == LOV_MAGIC_V1) {
 432                 return lsme_unpack(lov, lmm, lmm_buf_size, NULL,
 433                                    inited, lmm->lmm_objects, maxbytes);
 434         } else {
 435                 struct lov_mds_md_v3 *lmm3 = (struct lov_mds_md_v3 *)lmm;
 436
 437                 return lsme_unpack(lov, lmm, lmm_buf_size, lmm3->lmm_pool_name,
 438                                    inited, lmm3->lmm_objects, maxbytes);
 439         }
 440 }
 441
 442 static struct lov_stripe_md *
 443 lsm_unpackmd_comp_md_v1(struct lov_obd *lov, void *buf, size_t buf_size)
 444 {
 445         struct lov_comp_md_v1 *lcm = buf;
 446         struct lov_stripe_md *lsm;
 447         size_t lsm_size;
 448         unsigned int entry_count = 0;
 449         unsigned int i;
 450         loff_t maxbytes;
 451         int rc;
 452
 453         rc = lsm_verify_comp_md_v1(buf, buf_size);
 454         if (rc < 0)
 455                 return ERR_PTR(rc);
 456
 457         entry_count = le16_to_cpu(lcm->lcm_entry_count);
 458
 459         lsm_size = offsetof(typeof(*lsm), lsm_entries[entry_count]);
 460         OBD_ALLOC(lsm, lsm_size);
 461         if (!lsm)
 462                 return ERR_PTR(-ENOMEM);
 463
 464         atomic_set(&lsm->lsm_refc, 1);
 465         spin_lock_init(&lsm->lsm_lock);
 466         lsm->lsm_magic = le32_to_cpu(lcm->lcm_magic);
 467         lsm->lsm_layout_gen = le32_to_cpu(lcm->lcm_layout_gen);
 468         lsm->lsm_entry_count = entry_count;
 469         lsm->lsm_mirror_count = le16_to_cpu(lcm->lcm_mirror_count);
 470         lsm->lsm_flags = le16_to_cpu(lcm->lcm_flags);
 471         lsm->lsm_is_released = true;
 472         lsm->lsm_maxbytes = LLONG_MIN;
 473
 474         for (i = 0; i < entry_count; i++) {
 475                 struct lov_comp_md_entry_v1 *lcme = &lcm->lcm_entries[i];
 476                 struct lov_stripe_md_entry *lsme;
 477                 size_t blob_offset;
 478                 size_t blob_size;
 479                 void *blob;
 480
 481                 blob_offset = le32_to_cpu(lcme->lcme_offset);
 482                 blob_size = le32_to_cpu(lcme->lcme_size);
 483                 blob = (char *)lcm + blob_offset;
 484
 485                 lsme = lsme_unpack_comp(lov, blob, blob_size,
 486                                         le32_to_cpu(lcme->lcme_flags) &
 487                                         LCME_FL_INIT,
 488                                         (i == entry_count - 1) ? &maxbytes :
 489                                                                  NULL);
 490                 if (IS_ERR(lsme))
 491                         GOTO(out_lsm, rc = PTR_ERR(lsme));
 492
 493                 if (!(lsme->lsme_pattern & LOV_PATTERN_F_RELEASED))
 494                         lsm->lsm_is_released = false;
 495
 496                 lsm->lsm_entries[i] = lsme;
 497                 lsme->lsme_id = le32_to_cpu(lcme->lcme_id);
 498                 lsme->lsme_flags = le32_to_cpu(lcme->lcme_flags);
 499                 if (lsme->lsme_flags & LCME_FL_NOSYNC)
 500                         lsme->lsme_timestamp =
 501                                 le64_to_cpu(lcme->lcme_timestamp);
 502                 lu_extent_le_to_cpu(&lsme->lsme_extent, &lcme->lcme_extent);
 503
 504                 if (i == entry_count - 1) {
 505                         lsm->lsm_maxbytes = (loff_t)lsme->lsme_extent.e_start +
 506                                             maxbytes;
 507                         /*
 508                          * the last component hasn't been defined, or
 509                          * lsm_maxbytes overflowed.
 510                          */
 511                         if (!lsme_is_dom(lsme) &&
 512                             (lsme->lsme_extent.e_end != LUSTRE_EOF ||
 513                              lsm->lsm_maxbytes <
 514                              (loff_t)lsme->lsme_extent.e_start))
 515                                 lsm->lsm_maxbytes = MAX_LFS_FILESIZE;
 516                 }
 517         }
 518
 519         RETURN(lsm);
 520
 521 out_lsm:
 522         for (i = 0; i < entry_count; i++)
 523                 if (lsm->lsm_entries[i])
 524                         lsme_free(lsm->lsm_entries[i]);
 525
 526         OBD_FREE(lsm, lsm_size);
 527
 528         RETURN(ERR_PTR(rc));
 529 }
 530
 531 const struct lsm_operations lsm_comp_md_v1_ops = {
 532         .lsm_unpackmd         = lsm_unpackmd_comp_md_v1,
 533 };
 534
 535 static struct
 536 lov_stripe_md *lsm_unpackmd_foreign(struct lov_obd *lov, void *buf,
 537                                     size_t buf_size)
 538 {
 539         struct lov_foreign_md *lfm = buf;
 540         struct lov_stripe_md *lsm;
 541         size_t lsm_size;
 542         struct lov_stripe_md_entry *lsme;
 543
 544         lsm_size = offsetof(typeof(*lsm), lsm_entries[1]);
 545         OBD_ALLOC(lsm, lsm_size);
 546         if (lsm == NULL)
 547                 RETURN(ERR_PTR(-ENOMEM));
 548
 549         atomic_set(&lsm->lsm_refc, 1);
 550         spin_lock_init(&lsm->lsm_lock);
 551         lsm->lsm_magic = le32_to_cpu(lfm->lfm_magic);
 552         lsm->lsm_foreign_size = foreign_size_le(lfm);
 553
 554         /* alloc for full foreign EA including format fields */
 555         OBD_ALLOC_LARGE(lsme, lsm->lsm_foreign_size);
 556         if (lsme == NULL) {
 557                 OBD_FREE(lsm, lsm_size);
 558                 RETURN(ERR_PTR(-ENOMEM));
 559         }
 560
 561         /* copy full foreign EA including format fields */
 562         memcpy(lsme, buf, lsm->lsm_foreign_size);
 563
 564         lsm_foreign(lsm) = lsme;
 565
 566         return lsm;
 567 }
 568
 569 const struct lsm_operations lsm_foreign_ops = {
 570         .lsm_unpackmd         = lsm_unpackmd_foreign,
 571 };
 572
 573 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
 574 {
 575         int i, j;
 576
 577         CDEBUG_LIMIT(level,
 578                      "lsm %p, objid "DOSTID", maxbytes %#llx, magic 0x%08X, refc: %d, entry: %u, layout_gen %u\n",
 579                lsm, POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
 580                atomic_read(&lsm->lsm_refc), lsm->lsm_entry_count,
 581                lsm->lsm_layout_gen);
 582
 583         if (lsm->lsm_magic == LOV_MAGIC_FOREIGN) {
 584                 struct lov_foreign_md *lfm = (void *)lsm_foreign(lsm);
 585
 586                 CDEBUG_LIMIT(level,
 587                              "foreign LOV EA, magic %x, length %u, type %x, flags %x, value '%.*s'\n",
 588                        lfm->lfm_magic, lfm->lfm_length, lfm->lfm_type,
 589                        lfm->lfm_flags, lfm->lfm_length, lfm->lfm_value);
 590                 return;
 591         }
 592
 593         for (i = 0; i < lsm->lsm_entry_count; i++) {
 594                 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
 595
 596                 CDEBUG(level, DEXT ": id: %u, flags: %x, "
 597                        "magic 0x%08X, layout_gen %u, "
 598                        "stripe count %u, sstripe size %u, "
 599                        "pool: ["LOV_POOLNAMEF"]\n",
 600                        PEXT(&lse->lsme_extent), lse->lsme_id, lse->lsme_flags,
 601                        lse->lsme_magic, lse->lsme_layout_gen,
 602                        lse->lsme_stripe_count, lse->lsme_stripe_size,
 603                        lse->lsme_pool_name);
 604                 if (!lsme_inited(lse) ||
 605                     lse->lsme_pattern & LOV_PATTERN_F_RELEASED)
 606                         continue;
 607                 for (j = 0; j < lse->lsme_stripe_count; j++) {
 608                         CDEBUG(level, "   oinfo:%p: ostid: "DOSTID
 609                                " ost idx: %d gen: %d\n",
 610                                lse->lsme_oinfo[j],
 611                                POSTID(&lse->lsme_oinfo[j]->loi_oi),
 612                                lse->lsme_oinfo[j]->loi_ost_idx,
 613                                lse->lsme_oinfo[j]->loi_ost_gen);
 614                 }
 615         }
 616 }
 617
 618 int lov_lsm_entry(const struct lov_stripe_md *lsm, __u64 offset)
 619 {
 620         int i;
 621
 622         for (i = 0; i < lsm->lsm_entry_count; i++) {
 623                 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
 624
 625                 if ((offset >= lse->lsme_extent.e_start &&
 626                      offset < lse->lsme_extent.e_end) ||
 627                     (offset == OBD_OBJECT_EOF &&
 628                      lse->lsme_extent.e_end == OBD_OBJECT_EOF))
 629                         return i;
 630         }
 631
 632         return -1;
 633 }