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  *
  31  * lustre/lov/lov_ea.c
  32  *
  33  * Author: Wang Di <wangdi@clusterfs.com>
  34  */
  35
  36 #define DEBUG_SUBSYSTEM S_LOV
  37
  38 #include <linux/math64.h>
  39 #include <linux/sort.h>
  40 #include <libcfs/libcfs.h>
  41
  42 #include <obd_class.h>
  43 #include "lov_internal.h"
  44
  45 static inline void
  46 lu_extent_le_to_cpu(struct lu_extent *dst, const struct lu_extent *src)
  47 {
  48         dst->e_start = le64_to_cpu(src->e_start);
  49         dst->e_end = le64_to_cpu(src->e_end);
  50 }
  51
  52 /*
  53  * Find minimum stripe maxbytes value.  For inactive or
  54  * reconnecting targets use LUSTRE_EXT3_STRIPE_MAXBYTES.
  55  */
  56 static loff_t lov_tgt_maxbytes(struct lov_tgt_desc *tgt)
  57 {
  58         struct obd_import *imp;
  59         loff_t maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
  60
  61         if (!tgt->ltd_active)
  62                 return maxbytes;
  63
  64         imp = tgt->ltd_obd->u.cli.cl_import;
  65         if (!imp)
  66                 return maxbytes;
  67
  68         spin_lock(&imp->imp_lock);
  69         if ((imp->imp_state == LUSTRE_IMP_FULL ||
  70             imp->imp_state == LUSTRE_IMP_IDLE) &&
  71             (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
  72             imp->imp_connect_data.ocd_maxbytes > 0)
  73                 maxbytes = imp->imp_connect_data.ocd_maxbytes;
  74
  75         spin_unlock(&imp->imp_lock);
  76
  77         return maxbytes;
  78 }
  79
  80 static int lsm_lmm_verify_v1v3(struct lov_mds_md *lmm, size_t lmm_size,
  81                                u16 stripe_count)
  82 {
  83         u32 pattern = le32_to_cpu(lmm->lmm_pattern);
  84         int rc = 0;
  85
  86         if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
  87                 rc = -EINVAL;
  88                 CERROR("lov: bad stripe count %d: rc = %d\n",
  89                        stripe_count, rc);
  90                 lov_dump_lmm_common(D_WARNING, lmm);
  91                 goto out;
  92         }
  93
  94         if (lmm_oi_id(&lmm->lmm_oi) == 0) {
  95                 rc = -EINVAL;
  96                 CERROR("lov: zero object id: rc = %d\n", rc);
  97                 lov_dump_lmm_common(D_WARNING, lmm);
  98                 goto out;
  99         }
 100
 101         if (!lov_pattern_supported(lov_pattern(pattern))) {
 102                 rc = -EINVAL;
 103                 CERROR("lov: unrecognized striping pattern: rc = %d\n", rc);
 104                 lov_dump_lmm_common(D_WARNING, lmm);
 105                 goto out;
 106         }
 107
 108         if (lmm->lmm_stripe_size == 0 ||
 109             (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
 110                 rc = -EINVAL;
 111                 CERROR("lov: bad stripe size %u: rc = %d\n",
 112                        le32_to_cpu(lmm->lmm_stripe_size), rc);
 113                 lov_dump_lmm_common(D_WARNING, lmm);
 114                 goto out;
 115         }
 116
 117 out:
 118         return rc;
 119 }
 120
 121 static void lsme_free(struct lov_stripe_md_entry *lsme)
 122 {
 123         unsigned int stripe_count;
 124         unsigned int i;
 125         size_t lsme_size;
 126
 127         if (lsme->lsme_magic == LOV_MAGIC_FOREIGN) {
 128                 /*
 129                  * TODO: In addition to HSM foreign layout, It needs to add
 130                  * support for other kinds of foreign layout types such as
 131                  * DAOS, S3. When add these supports, it will use non-inline
 132                  * @lov_hsm_base to store layout information, and need to
 133                  * free extra allocated buffer.
 134                  */
 135                 OBD_FREE_LARGE(lsme, sizeof(*lsme));
 136                 return;
 137         }
 138
 139         stripe_count = lsme->lsme_stripe_count;
 140         if (!lsme_inited(lsme) ||
 141             lsme->lsme_pattern & LOV_PATTERN_F_RELEASED)
 142                 stripe_count = 0;
 143         for (i = 0; i < stripe_count; i++)
 144                 OBD_SLAB_FREE_PTR(lsme->lsme_oinfo[i], lov_oinfo_slab);
 145
 146         lsme_size = offsetof(typeof(*lsme), lsme_oinfo[stripe_count]);
 147         OBD_FREE_LARGE(lsme, lsme_size);
 148 }
 149
 150 void lsm_free(struct lov_stripe_md *lsm)
 151 {
 152         unsigned int entry_count = lsm->lsm_entry_count;
 153         unsigned int i;
 154         size_t lsm_size;
 155
 156         if (lsm->lsm_magic == LOV_MAGIC_FOREIGN) {
 157                 OBD_FREE_LARGE(lsm_foreign(lsm), lsm->lsm_foreign_size);
 158         } else {
 159                 for (i = 0; i < entry_count; i++)
 160                         lsme_free(lsm->lsm_entries[i]);
 161         }
 162
 163         lsm_size = lsm->lsm_magic == LOV_MAGIC_FOREIGN ?
 164                    offsetof(typeof(*lsm), lsm_entries[1]) :
 165                    offsetof(typeof(*lsm), lsm_entries[entry_count]);
 166         OBD_FREE(lsm, lsm_size);
 167 }
 168
 169 /**
 170  * Unpack a struct lov_mds_md into a struct lov_stripe_md_entry.
 171  *
 172  * The caller should set id and extent.
 173  */
 174 static struct lov_stripe_md_entry *
 175 lsme_unpack(struct lov_obd *lov, struct lov_mds_md *lmm, size_t buf_size,
 176             const char *pool_name, bool inited, struct lov_ost_data_v1 *objects,
 177             loff_t *maxbytes)
 178 {
 179         struct lov_stripe_md_entry *lsme;
 180         size_t lsme_size;
 181         loff_t min_stripe_maxbytes = 0;
 182         loff_t lov_bytes;
 183         u32 magic;
 184         u32 pattern;
 185         unsigned int stripe_count;
 186         unsigned int i;
 187         int rc;
 188
 189         magic = le32_to_cpu(lmm->lmm_magic);
 190         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 191                 RETURN(ERR_PTR(-EINVAL));
 192
 193         pattern = le32_to_cpu(lmm->lmm_pattern);
 194         if (pattern & LOV_PATTERN_F_RELEASED || !inited)
 195                 stripe_count = 0;
 196         else
 197                 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 198
 199         if (buf_size < lov_mds_md_size(stripe_count, magic)) {
 200                 CERROR("LOV EA %s too small: %zu, need %u\n",
 201                        magic == LOV_MAGIC_V1 ? "V1" : "V3", buf_size,
 202                        lov_mds_md_size(stripe_count, magic == LOV_MAGIC_V1 ?
 203                                        LOV_MAGIC_V1 : LOV_MAGIC_V3));
 204                 lov_dump_lmm_common(D_WARNING, lmm);
 205                 return ERR_PTR(-EINVAL);
 206         }
 207
 208         rc = lsm_lmm_verify_v1v3(lmm, buf_size, stripe_count);
 209         if (rc < 0)
 210                 return ERR_PTR(rc);
 211
 212         lsme_size = offsetof(typeof(*lsme), lsme_oinfo[stripe_count]);
 213         OBD_ALLOC_LARGE(lsme, lsme_size);
 214         if (!lsme)
 215                 RETURN(ERR_PTR(-ENOMEM));
 216
 217         lsme->lsme_magic = magic;
 218         lsme->lsme_pattern = pattern;
 219         lsme->lsme_flags = 0;
 220         lsme->lsme_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 221         /* preserve the possible -1 stripe count for uninstantiated component */
 222         lsme->lsme_stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
 223         lsme->lsme_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 224
 225         if (pool_name) {
 226                 size_t pool_name_len;
 227
 228                 pool_name_len = strlcpy(lsme->lsme_pool_name, pool_name,
 229                                         sizeof(lsme->lsme_pool_name));
 230                 if (pool_name_len >= sizeof(lsme->lsme_pool_name))
 231                         GOTO(out_lsme, rc = -E2BIG);
 232         }
 233
 234         /* with Data-on-MDT set maxbytes to stripe size */
 235         if (lsme_is_dom(lsme)) {
 236                 if (maxbytes) {
 237                         lov_bytes = lsme->lsme_stripe_size;
 238                         goto out_dom1;
 239                 } else {
 240                         goto out_dom2;
 241                 }
 242         }
 243
 244         for (i = 0; i < stripe_count; i++) {
 245                 struct lov_oinfo *loi;
 246                 struct lov_tgt_desc *ltd;
 247
 248                 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
 249                 if (!loi)
 250                         GOTO(out_lsme, rc = -ENOMEM);
 251
 252                 lsme->lsme_oinfo[i] = loi;
 253
 254                 ostid_le_to_cpu(&objects[i].l_ost_oi, &loi->loi_oi);
 255                 loi->loi_ost_idx = le32_to_cpu(objects[i].l_ost_idx);
 256                 loi->loi_ost_gen = le32_to_cpu(objects[i].l_ost_gen);
 257                 if (lov_oinfo_is_dummy(loi))
 258                         continue;
 259
 260                 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count &&
 261                     !lov2obd(lov)->obd_process_conf) {
 262                         CERROR("%s: OST index %d more than OST count %d\n",
 263                                (char*)lov->desc.ld_uuid.uuid,
 264                                loi->loi_ost_idx, lov->desc.ld_tgt_count);
 265                         lov_dump_lmm_v1(D_WARNING, lmm);
 266                         GOTO(out_lsme, rc = -EINVAL);
 267                 }
 268
 269                 ltd = lov->lov_tgts[loi->loi_ost_idx];
 270                 if (!ltd) {
 271                         CERROR("%s: OST index %d missing\n",
 272                                (char*)lov->desc.ld_uuid.uuid, loi->loi_ost_idx);
 273                         lov_dump_lmm_v1(D_WARNING, lmm);
 274                         continue;
 275                 }
 276
 277                 lov_bytes = lov_tgt_maxbytes(ltd);
 278                 if (min_stripe_maxbytes == 0 || lov_bytes < min_stripe_maxbytes)
 279                         min_stripe_maxbytes = lov_bytes;
 280         }
 281
 282         if (maxbytes) {
 283                 if (min_stripe_maxbytes == 0)
 284                         min_stripe_maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
 285
 286                 if (stripe_count == 0)
 287                         stripe_count = lov->desc.ld_tgt_count;
 288
 289                 if (min_stripe_maxbytes <= LLONG_MAX / stripe_count)
 290                         lov_bytes = min_stripe_maxbytes * stripe_count;
 291                 else
 292                         lov_bytes = MAX_LFS_FILESIZE;
 293 out_dom1:
 294                 *maxbytes = min_t(loff_t, lov_bytes, MAX_LFS_FILESIZE);
 295         }
 296 out_dom2:
 297
 298         return lsme;
 299
 300 out_lsme:
 301         for (i = 0; i < stripe_count; i++) {
 302                 struct lov_oinfo *loi = lsme->lsme_oinfo[i];
 303
 304                 if (loi)
 305                         OBD_SLAB_FREE_PTR(lsme->lsme_oinfo[i], lov_oinfo_slab);
 306         }
 307         OBD_FREE_LARGE(lsme, lsme_size);
 308
 309         return ERR_PTR(rc);
 310 }
 311
 312 static struct
 313 lov_stripe_md *lsm_unpackmd_v1v3(struct lov_obd *lov, struct lov_mds_md *lmm,
 314                                  size_t buf_size, const char *pool_name,
 315                                  struct lov_ost_data_v1 *objects)
 316 {
 317         struct lov_stripe_md *lsm;
 318         struct lov_stripe_md_entry *lsme;
 319         size_t lsm_size;
 320         loff_t maxbytes;
 321         u32 pattern;
 322         int rc;
 323
 324         pattern = le32_to_cpu(lmm->lmm_pattern);
 325
 326         lsme = lsme_unpack(lov, lmm, buf_size, pool_name, true, objects,
 327                            &maxbytes);
 328         if (IS_ERR(lsme))
 329                 RETURN(ERR_CAST(lsme));
 330
 331         lsme->lsme_flags = LCME_FL_INIT;
 332         lsme->lsme_extent.e_start = 0;
 333         lsme->lsme_extent.e_end = LUSTRE_EOF;
 334
 335         lsm_size = offsetof(typeof(*lsm), lsm_entries[1]);
 336         OBD_ALLOC(lsm, lsm_size);
 337         if (!lsm)
 338                 GOTO(out_lsme, rc = -ENOMEM);
 339
 340         atomic_set(&lsm->lsm_refc, 1);
 341         spin_lock_init(&lsm->lsm_lock);
 342         lsm->lsm_maxbytes = maxbytes;
 343         lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
 344         lsm->lsm_magic = le32_to_cpu(lmm->lmm_magic);
 345         lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 346         lsm->lsm_entry_count = 1;
 347         lsm->lsm_is_released = pattern & LOV_PATTERN_F_RELEASED;
 348         lsm->lsm_entries[0] = lsme;
 349
 350         return lsm;
 351
 352 out_lsme:
 353         lsme_free(lsme);
 354
 355         return ERR_PTR(rc);
 356 }
 357
 358 static struct lov_stripe_md *
 359 lsm_unpackmd_v1(struct lov_obd *lov, void *buf, size_t buf_size)
 360 {
 361         struct lov_mds_md_v1 *lmm = buf;
 362
 363         return lsm_unpackmd_v1v3(lov, buf, buf_size, NULL, lmm->lmm_objects);
 364 }
 365
 366 static const struct lsm_operations lsm_v1_ops = {
 367         .lsm_unpackmd           = lsm_unpackmd_v1,
 368 };
 369
 370 static struct lov_stripe_md *
 371 lsm_unpackmd_v3(struct lov_obd *lov, void *buf, size_t buf_size)
 372 {
 373         struct lov_mds_md_v3 *lmm = buf;
 374
 375         return lsm_unpackmd_v1v3(lov, buf, buf_size, lmm->lmm_pool_name,
 376                                  lmm->lmm_objects);
 377 }
 378
 379 static const struct lsm_operations lsm_v3_ops = {
 380         .lsm_unpackmd           = lsm_unpackmd_v3,
 381 };
 382
 383 static int lsm_verify_comp_md_v1(struct lov_comp_md_v1 *lcm,
 384                                  size_t lcm_buf_size)
 385 {
 386         unsigned int entry_count;
 387         unsigned int i;
 388         size_t lcm_size;
 389
 390         lcm_size = le32_to_cpu(lcm->lcm_size);
 391         if (lcm_buf_size < lcm_size) {
 392                 CERROR("bad LCM buffer size %zu, expected %zu\n",
 393                        lcm_buf_size, lcm_size);
 394                 RETURN(-EINVAL);
 395         }
 396
 397         entry_count = le16_to_cpu(lcm->lcm_entry_count);
 398         for (i = 0; i < entry_count; i++) {
 399                 struct lov_comp_md_entry_v1 *lcme = &lcm->lcm_entries[i];
 400                 size_t blob_offset;
 401                 size_t blob_size;
 402
 403                 blob_offset = le32_to_cpu(lcme->lcme_offset);
 404                 blob_size = le32_to_cpu(lcme->lcme_size);
 405
 406                 if (lcm_size < blob_offset || lcm_size < blob_size ||
 407                     lcm_size < blob_offset + blob_size) {
 408                         CERROR("LCM entry %u has invalid blob: "
 409                                "LCM size = %zu, offset = %zu, size = %zu\n",
 410                                le32_to_cpu(lcme->lcme_id),
 411                                lcm_size, blob_offset, blob_size);
 412                         RETURN(-EINVAL);
 413                 }
 414         }
 415
 416         return 0;
 417 }
 418
 419 static struct lov_stripe_md_entry *
 420 lsme_unpack_foreign(struct lov_obd *lov, void *buf, size_t buf_size,
 421                     bool inited, loff_t *maxbytes)
 422 {
 423         struct lov_stripe_md_entry *lsme;
 424         struct lov_foreign_md *lfm = buf;
 425         __u32 magic;
 426
 427         ENTRY;
 428
 429         magic = le32_to_cpu(lfm->lfm_magic);
 430         if (magic != LOV_MAGIC_FOREIGN)
 431                 RETURN(ERR_PTR(-EINVAL));
 432
 433         OBD_ALLOC_LARGE(lsme, sizeof(*lsme));
 434         if (!lsme)
 435                 RETURN(ERR_PTR(-ENOMEM));
 436
 437         lsme->lsme_magic = magic;
 438         lsme->lsme_pattern = LOV_PATTERN_FOREIGN;
 439         lsme->lsme_flags = 0;
 440
 441         if (maxbytes)
 442                 *maxbytes = MAX_LFS_FILESIZE;
 443
 444         RETURN(lsme);
 445 }
 446
 447 static struct lov_stripe_md_entry *
 448 lsme_unpack_comp(struct lov_obd *lov, struct lov_mds_md *lmm,
 449                  size_t lmm_buf_size, bool inited, loff_t *maxbytes)
 450 {
 451         unsigned int magic;
 452
 453         magic = le32_to_cpu(lmm->lmm_magic);
 454         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3 &&
 455             magic != LOV_MAGIC_FOREIGN)
 456                 RETURN(ERR_PTR(-EINVAL));
 457
 458         if (magic != LOV_MAGIC_FOREIGN &&
 459             le16_to_cpu(lmm->lmm_stripe_count) == 0 &&
 460             lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_MDT)
 461                 RETURN(ERR_PTR(-EINVAL));
 462
 463         if (magic == LOV_MAGIC_V1) {
 464                 return lsme_unpack(lov, lmm, lmm_buf_size, NULL,
 465                                    inited, lmm->lmm_objects, maxbytes);
 466         } else if (magic == LOV_MAGIC_V3) {
 467                 struct lov_mds_md_v3 *lmm3 = (struct lov_mds_md_v3 *)lmm;
 468
 469                 return lsme_unpack(lov, lmm, lmm_buf_size, lmm3->lmm_pool_name,
 470                                    inited, lmm3->lmm_objects, maxbytes);
 471         } else { /* LOV_MAGIC_FOREIGN */
 472                 return lsme_unpack_foreign(lov, lmm, lmm_buf_size,
 473                                            inited, maxbytes);
 474         }
 475 }
 476
 477 static struct lov_stripe_md *
 478 lsm_unpackmd_comp_md_v1(struct lov_obd *lov, void *buf, size_t buf_size)
 479 {
 480         struct lov_comp_md_v1 *lcm = buf;
 481         struct lov_stripe_md *lsm;
 482         size_t lsm_size;
 483         unsigned int entry_count = 0;
 484         unsigned int i;
 485         loff_t maxbytes;
 486         int rc;
 487
 488         rc = lsm_verify_comp_md_v1(buf, buf_size);
 489         if (rc < 0)
 490                 return ERR_PTR(rc);
 491
 492         entry_count = le16_to_cpu(lcm->lcm_entry_count);
 493
 494         lsm_size = offsetof(typeof(*lsm), lsm_entries[entry_count]);
 495         OBD_ALLOC(lsm, lsm_size);
 496         if (!lsm)
 497                 return ERR_PTR(-ENOMEM);
 498
 499         atomic_set(&lsm->lsm_refc, 1);
 500         spin_lock_init(&lsm->lsm_lock);
 501         lsm->lsm_magic = le32_to_cpu(lcm->lcm_magic);
 502         lsm->lsm_layout_gen = le32_to_cpu(lcm->lcm_layout_gen);
 503         lsm->lsm_entry_count = entry_count;
 504         lsm->lsm_mirror_count = le16_to_cpu(lcm->lcm_mirror_count);
 505         lsm->lsm_flags = le16_to_cpu(lcm->lcm_flags);
 506         lsm->lsm_is_released = true;
 507         lsm->lsm_maxbytes = LLONG_MIN;
 508
 509         for (i = 0; i < entry_count; i++) {
 510                 struct lov_comp_md_entry_v1 *lcme = &lcm->lcm_entries[i];
 511                 struct lov_stripe_md_entry *lsme;
 512                 size_t blob_offset;
 513                 size_t blob_size;
 514                 void *blob;
 515
 516                 blob_offset = le32_to_cpu(lcme->lcme_offset);
 517                 blob_size = le32_to_cpu(lcme->lcme_size);
 518                 blob = (char *)lcm + blob_offset;
 519
 520                 lsme = lsme_unpack_comp(lov, blob, blob_size,
 521                                         le32_to_cpu(lcme->lcme_flags) &
 522                                         LCME_FL_INIT,
 523                                         (i == entry_count - 1) ? &maxbytes :
 524                                                                  NULL);
 525                 if (IS_ERR(lsme))
 526                         GOTO(out_lsm, rc = PTR_ERR(lsme));
 527
 528                 if (!(lsme->lsme_pattern & LOV_PATTERN_F_RELEASED))
 529                         lsm->lsm_is_released = false;
 530
 531                 lsm->lsm_entries[i] = lsme;
 532                 lsme->lsme_id = le32_to_cpu(lcme->lcme_id);
 533                 lsme->lsme_flags = le32_to_cpu(lcme->lcme_flags);
 534                 if (lsme->lsme_flags & LCME_FL_NOSYNC)
 535                         lsme->lsme_timestamp =
 536                                 le64_to_cpu(lcme->lcme_timestamp);
 537                 lu_extent_le_to_cpu(&lsme->lsme_extent, &lcme->lcme_extent);
 538
 539                 if (i == entry_count - 1) {
 540                         lsm->lsm_maxbytes = (loff_t)lsme->lsme_extent.e_start +
 541                                             maxbytes;
 542                         /*
 543                          * the last component hasn't been defined, or
 544                          * lsm_maxbytes overflowed.
 545                          */
 546                         if (!lsme_is_dom(lsme) &&
 547                             (lsme->lsme_extent.e_end != LUSTRE_EOF ||
 548                              lsm->lsm_maxbytes <
 549                              (loff_t)lsme->lsme_extent.e_start))
 550                                 lsm->lsm_maxbytes = MAX_LFS_FILESIZE;
 551                 }
 552         }
 553
 554         RETURN(lsm);
 555
 556 out_lsm:
 557         for (i = 0; i < entry_count; i++)
 558                 if (lsm->lsm_entries[i])
 559                         lsme_free(lsm->lsm_entries[i]);
 560
 561         OBD_FREE(lsm, lsm_size);
 562
 563         RETURN(ERR_PTR(rc));
 564 }
 565
 566 static const struct lsm_operations lsm_comp_md_v1_ops = {
 567         .lsm_unpackmd           = lsm_unpackmd_comp_md_v1,
 568 };
 569
 570 static struct
 571 lov_stripe_md *lsm_unpackmd_foreign(struct lov_obd *lov, void *buf,
 572                                     size_t buf_size)
 573 {
 574         struct lov_foreign_md *lfm = buf;
 575         struct lov_stripe_md *lsm;
 576         size_t lsm_size;
 577         struct lov_stripe_md_entry *lsme;
 578
 579         lsm_size = offsetof(typeof(*lsm), lsm_entries[1]);
 580         OBD_ALLOC(lsm, lsm_size);
 581         if (lsm == NULL)
 582                 RETURN(ERR_PTR(-ENOMEM));
 583
 584         atomic_set(&lsm->lsm_refc, 1);
 585         spin_lock_init(&lsm->lsm_lock);
 586         lsm->lsm_magic = le32_to_cpu(lfm->lfm_magic);
 587         lsm->lsm_foreign_size = foreign_size_le(lfm);
 588
 589         /* alloc for full foreign EA including format fields */
 590         OBD_ALLOC_LARGE(lsme, lsm->lsm_foreign_size);
 591         if (lsme == NULL) {
 592                 OBD_FREE(lsm, lsm_size);
 593                 RETURN(ERR_PTR(-ENOMEM));
 594         }
 595
 596         /* copy full foreign EA including format fields */
 597         memcpy(lsme, buf, lsm->lsm_foreign_size);
 598
 599         lsm_foreign(lsm) = lsme;
 600
 601         return lsm;
 602 }
 603
 604 static const struct lsm_operations lsm_foreign_ops = {
 605         .lsm_unpackmd           = lsm_unpackmd_foreign,
 606 };
 607
 608 const struct lsm_operations *lsm_op_find(int magic)
 609 {
 610         switch (magic) {
 611         case LOV_MAGIC_V1:
 612                 return &lsm_v1_ops;
 613         case LOV_MAGIC_V3:
 614                 return &lsm_v3_ops;
 615         case LOV_MAGIC_COMP_V1:
 616                 return &lsm_comp_md_v1_ops;
 617         case LOV_MAGIC_FOREIGN:
 618                 return &lsm_foreign_ops;
 619         default:
 620                 CERROR("unrecognized lsm_magic %08x\n", magic);
 621                 return NULL;
 622         }
 623 }
 624
 625 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
 626 {
 627         int i, j;
 628
 629         CDEBUG_LIMIT(level,
 630                      "lsm %p, objid "DOSTID", maxbytes %#llx, magic 0x%08X, refc: %d, entry: %u, mirror: %u, flags: %u,layout_gen %u\n",
 631                lsm, POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
 632                atomic_read(&lsm->lsm_refc), lsm->lsm_entry_count,
 633                lsm->lsm_mirror_count, lsm->lsm_flags, lsm->lsm_layout_gen);
 634
 635         if (lsm->lsm_magic == LOV_MAGIC_FOREIGN) {
 636                 struct lov_foreign_md *lfm = (void *)lsm_foreign(lsm);
 637
 638                 CDEBUG_LIMIT(level,
 639                              "foreign LOV EA, magic %x, length %u, type %x, flags %x, value '%.*s'\n",
 640                        lfm->lfm_magic, lfm->lfm_length, lfm->lfm_type,
 641                        lfm->lfm_flags, lfm->lfm_length, lfm->lfm_value);
 642                 return;
 643         }
 644
 645         for (i = 0; i < lsm->lsm_entry_count; i++) {
 646                 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
 647
 648                 CDEBUG(level, DEXT ": id: %u, flags: %x, "
 649                        "magic 0x%08X, layout_gen %u, "
 650                        "stripe count %u, sstripe size %u, "
 651                        "pool: ["LOV_POOLNAMEF"]\n",
 652                        PEXT(&lse->lsme_extent), lse->lsme_id, lse->lsme_flags,
 653                        lse->lsme_magic, lse->lsme_layout_gen,
 654                        lse->lsme_stripe_count, lse->lsme_stripe_size,
 655                        lse->lsme_pool_name);
 656                 if (!lsme_inited(lse) ||
 657                     lse->lsme_pattern & LOV_PATTERN_F_RELEASED)
 658                         continue;
 659                 for (j = 0; j < lse->lsme_stripe_count; j++) {
 660                         CDEBUG(level, "   oinfo:%p: ostid: "DOSTID
 661                                " ost idx: %d gen: %d\n",
 662                                lse->lsme_oinfo[j],
 663                                POSTID(&lse->lsme_oinfo[j]->loi_oi),
 664                                lse->lsme_oinfo[j]->loi_ost_idx,
 665                                lse->lsme_oinfo[j]->loi_ost_gen);
 666                 }
 667         }
 668 }
 669
 670 int lov_lsm_entry(const struct lov_stripe_md *lsm, __u64 offset)
 671 {
 672         int i;
 673
 674         for (i = 0; i < lsm->lsm_entry_count; i++) {
 675                 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
 676
 677                 if ((offset >= lse->lsme_extent.e_start &&
 678                      offset < lse->lsme_extent.e_end) ||
 679                     (offset == OBD_OBJECT_EOF &&
 680                      lse->lsme_extent.e_end == OBD_OBJECT_EOF))
 681                         return i;
 682         }
 683
 684         return -1;
 685 }
 686
 687 /**
 688  * lmm_layout_gen overlaps stripe_offset field, it needs to be reset back when
 689  * sending to MDT for passing striping checks
 690  */
 691 void lov_fix_ea_for_replay(void *lovea)
 692 {
 693         struct lov_user_md *lmm = lovea;
 694         struct lov_comp_md_v1 *c1;
 695         int i;
 696
 697         switch (le32_to_cpu(lmm->lmm_magic)) {
 698         case LOV_USER_MAGIC_V1:
 699         case LOV_USER_MAGIC_V3:
 700                 lmm->lmm_stripe_offset = LOV_OFFSET_DEFAULT;
 701                 break;
 702
 703         case LOV_USER_MAGIC_COMP_V1:
 704                 c1 = (void *)lmm;
 705                 for (i = 0; i < le16_to_cpu(c1->lcm_entry_count); i++) {
 706                         struct lov_comp_md_entry_v1 *ent = &c1->lcm_entries[i];
 707
 708                         if (le32_to_cpu(ent->lcme_flags) & LCME_FL_INIT) {
 709                                 lmm = (void *)((char *)c1 +
 710                                       le32_to_cpu(ent->lcme_offset));
 711                                 lmm->lmm_stripe_offset = LOV_OFFSET_DEFAULT;
 712                         }
 713                 }
 714         }
 715 }
 716 EXPORT_SYMBOL(lov_fix_ea_for_replay);