lustre/lod/lod_lov.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,
  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  2009 Sun Microsystems, Inc. All rights reserved
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2013, Intel Corporation.
  27  */
  28 /*
  29  * lustre/lod/lod_lov.c
  30  *
  31  * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
  32  */
  33
  34 #define DEBUG_SUBSYSTEM S_MDS
  35
  36 #include <obd_class.h>
  37 #include <obd_lov.h>
  38
  39 #include "lod_internal.h"
  40
  41 /*
  42  * Keep a refcount of lod->ltd_tgts usage to prevent racing with
  43  * addition/deletion. Any function that expects lov_tgts to remain stationary
  44  * must take a ref.
  45  *
  46  * \param lod - is the lod device from which we want to grab a reference
  47  */
  48 void lod_getref(struct lod_tgt_descs *ltd)
  49 {
  50         down_read(&ltd->ltd_rw_sem);
  51         mutex_lock(&ltd->ltd_mutex);
  52         ltd->ltd_refcount++;
  53         mutex_unlock(&ltd->ltd_mutex);
  54 }
  55
  56 /*
  57  * Companion of lod_getref() to release a reference on the lod table.
  58  * If this is the last reference and the ost entry was scheduled for deletion,
  59  * the descriptor is removed from the array.
  60  *
  61  * \param lod - is the lod device from which we release a reference
  62  */
  63 void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd)
  64 {
  65         mutex_lock(&ltd->ltd_mutex);
  66         ltd->ltd_refcount--;
  67         if (ltd->ltd_refcount == 0 && ltd->ltd_death_row) {
  68                 struct lod_tgt_desc *tgt_desc, *tmp;
  69                 int                  idx;
  70                 CFS_LIST_HEAD(kill);
  71
  72                 CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
  73                        ltd->ltd_death_row);
  74
  75                 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
  76                         tgt_desc = LTD_TGT(ltd, idx);
  77                         LASSERT(tgt_desc);
  78
  79                         if (!tgt_desc->ltd_reap)
  80                                 continue;
  81
  82                         cfs_list_add(&tgt_desc->ltd_kill, &kill);
  83                         LTD_TGT(ltd, idx) = NULL;
  84                         /*FIXME: only support ost pool for now */
  85                         if (ltd == &lod->lod_ost_descs) {
  86                                 lod_ost_pool_remove(&lod->lod_pool_info, idx);
  87                                 if (tgt_desc->ltd_active)
  88                                         lod->lod_desc.ld_active_tgt_count--;
  89                         }
  90                         ltd->ltd_tgtnr--;
  91                         cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
  92                         ltd->ltd_death_row--;
  93                 }
  94                 mutex_unlock(&ltd->ltd_mutex);
  95                 up_read(&ltd->ltd_rw_sem);
  96
  97                 cfs_list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
  98                         int rc;
  99                         cfs_list_del(&tgt_desc->ltd_kill);
 100                         if (ltd == &lod->lod_ost_descs) {
 101                                 /* remove from QoS structures */
 102                                 rc = qos_del_tgt(lod, tgt_desc);
 103                                 if (rc)
 104                                         CERROR("%s: qos_del_tgt(%s) failed:"
 105                                                "rc = %d\n",
 106                                                lod2obd(lod)->obd_name,
 107                                               obd_uuid2str(&tgt_desc->ltd_uuid),
 108                                                rc);
 109                         }
 110                         rc = obd_disconnect(tgt_desc->ltd_exp);
 111                         if (rc)
 112                                 CERROR("%s: failed to disconnect %s: rc = %d\n",
 113                                        lod2obd(lod)->obd_name,
 114                                        obd_uuid2str(&tgt_desc->ltd_uuid), rc);
 115                         OBD_FREE_PTR(tgt_desc);
 116                 }
 117         } else {
 118                 mutex_unlock(&ltd->ltd_mutex);
 119                 up_read(&ltd->ltd_rw_sem);
 120         }
 121 }
 122
 123 static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
 124 {
 125         cfs_bitmap_t *new_bitmap, *old_bitmap = NULL;
 126         int           rc = 0;
 127         ENTRY;
 128
 129         /* grab write reference on the lod. Relocating the array requires
 130          * exclusive access */
 131
 132         down_write(&ltd->ltd_rw_sem);
 133         if (newsize <= ltd->ltd_tgts_size)
 134                 /* someone else has already resize the array */
 135                 GOTO(out, rc = 0);
 136
 137         /* allocate new bitmap */
 138         new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
 139         if (!new_bitmap)
 140                 GOTO(out, rc = -ENOMEM);
 141
 142         if (ltd->ltd_tgts_size > 0) {
 143                 /* the bitmap already exists, we need
 144                  * to copy data from old one */
 145                 cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
 146                 old_bitmap = ltd->ltd_tgt_bitmap;
 147         }
 148
 149         ltd->ltd_tgts_size  = newsize;
 150         ltd->ltd_tgt_bitmap = new_bitmap;
 151
 152         if (old_bitmap)
 153                 CFS_FREE_BITMAP(old_bitmap);
 154
 155         CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
 156
 157         EXIT;
 158 out:
 159         up_write(&ltd->ltd_rw_sem);
 160         return rc;
 161 }
 162
 163 /*
 164  * Connect LOD to a new OSP and add it to the device table.
 165  *
 166  * \param env - is the environment passed by the caller
 167  * \param lod - is the LOD device to be connected to the new OSP
 168  * \param osp - is the name of OSP device name about to be added
 169  * \param index - is the OSP index
 170  * \param gen - is the generation number
 171  * \param tgt_index - is the group of the OSP.
 172  * \param type - is the type of device (mdc or osc)
 173  */
 174 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
 175                    char *osp, unsigned index, unsigned gen, int tgt_index,
 176                    char *type, int active)
 177 {
 178         struct obd_connect_data *data = NULL;
 179         struct obd_export       *exp = NULL;
 180         struct obd_device       *obd;
 181         struct lu_device        *ldev;
 182         struct dt_device        *d;
 183         int                      rc;
 184         struct lod_tgt_desc     *tgt_desc;
 185         struct lod_tgt_descs    *ltd;
 186         struct obd_uuid         obd_uuid;
 187         ENTRY;
 188
 189         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
 190
 191         if (gen <= 0) {
 192                 CERROR("request to add OBD %s with invalid generation: %d\n",
 193                        osp, gen);
 194                 RETURN(-EINVAL);
 195         }
 196
 197         obd_str2uuid(&obd_uuid, osp);
 198
 199         obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
 200                                 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 201         if (obd == NULL) {
 202                 CERROR("can't find %s device\n", osp);
 203                 RETURN(-EINVAL);
 204         }
 205
 206         OBD_ALLOC_PTR(data);
 207         if (data == NULL)
 208                 RETURN(-ENOMEM);
 209
 210         data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
 211         data->ocd_version = LUSTRE_VERSION_CODE;
 212         data->ocd_index = index;
 213
 214         if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
 215                 data->ocd_connect_flags |= OBD_CONNECT_AT |
 216                                            OBD_CONNECT_FULL20 |
 217                                            OBD_CONNECT_INDEX |
 218 #ifdef HAVE_LRU_RESIZE_SUPPORT
 219                                            OBD_CONNECT_LRU_RESIZE |
 220 #endif
 221                                            OBD_CONNECT_MDS |
 222                                            OBD_CONNECT_OSS_CAPA |
 223                                            OBD_CONNECT_REQPORTAL |
 224                                            OBD_CONNECT_SKIP_ORPHAN |
 225                                            OBD_CONNECT_FID |
 226                                            OBD_CONNECT_LVB_TYPE |
 227                                            OBD_CONNECT_VERSION |
 228                                            OBD_CONNECT_PINGLESS;
 229
 230                 data->ocd_group = tgt_index;
 231                 ltd = &lod->lod_ost_descs;
 232         } else {
 233                 struct obd_import *imp = obd->u.cli.cl_import;
 234
 235                 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
 236                 data->ocd_connect_flags |= OBD_CONNECT_ACL |
 237                                            OBD_CONNECT_MDS_CAPA |
 238                                            OBD_CONNECT_OSS_CAPA |
 239                                            OBD_CONNECT_IBITS |
 240                                            OBD_CONNECT_MDS_MDS |
 241                                            OBD_CONNECT_FID |
 242                                            OBD_CONNECT_AT |
 243                                            OBD_CONNECT_FULL20;
 244                 /* XXX set MDS-MDS flags, remove this when running this
 245                  * on client*/
 246                 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS;
 247                 spin_lock(&imp->imp_lock);
 248                 imp->imp_server_timeout = 1;
 249                 spin_unlock(&imp->imp_lock);
 250                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
 251                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
 252                       obd->obd_name);
 253                 ltd = &lod->lod_mdt_descs;
 254         }
 255
 256         rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
 257         OBD_FREE_PTR(data);
 258         if (rc) {
 259                 CERROR("%s: cannot connect to next dev %s (%d)\n",
 260                        obd->obd_name, osp, rc);
 261                 GOTO(out_free, rc);
 262         }
 263
 264         LASSERT(obd->obd_lu_dev);
 265         LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
 266
 267         ldev = obd->obd_lu_dev;
 268         d = lu2dt_dev(ldev);
 269
 270         /* Allocate ost descriptor and fill it */
 271         OBD_ALLOC_PTR(tgt_desc);
 272         if (!tgt_desc)
 273                 GOTO(out_conn, rc = -ENOMEM);
 274
 275         tgt_desc->ltd_tgt    = d;
 276         tgt_desc->ltd_exp    = exp;
 277         tgt_desc->ltd_uuid   = obd->u.cli.cl_target_uuid;
 278         tgt_desc->ltd_gen    = gen;
 279         tgt_desc->ltd_index  = index;
 280         tgt_desc->ltd_active = active;
 281
 282         lod_getref(ltd);
 283         if (index >= ltd->ltd_tgts_size) {
 284                 /* we have to increase the size of the lod_osts array */
 285                 __u32  newsize;
 286
 287                 newsize = max(ltd->ltd_tgts_size, (__u32)2);
 288                 while (newsize < index + 1)
 289                         newsize = newsize << 1;
 290
 291                 /* lod_bitmap_resize() needs lod_rw_sem
 292                  * which we hold with th reference */
 293                 lod_putref(lod, ltd);
 294
 295                 rc = ltd_bitmap_resize(ltd, newsize);
 296                 if (rc)
 297                         GOTO(out_desc, rc);
 298
 299                 lod_getref(ltd);
 300         }
 301
 302         mutex_lock(&ltd->ltd_mutex);
 303         if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
 304                 CERROR("%s: device %d is registered already\n", obd->obd_name,
 305                        index);
 306                 GOTO(out_mutex, rc = -EEXIST);
 307         }
 308
 309         if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 310                 OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
 311                 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 312                         CERROR("can't allocate index to add %s\n",
 313                                obd->obd_name);
 314                         GOTO(out_mutex, rc = -ENOMEM);
 315                 }
 316         }
 317
 318         if (!strcmp(LUSTRE_OSC_NAME, type)) {
 319                 /* pool and qos are not supported for MDS stack yet */
 320                 rc = lod_ost_pool_add(&lod->lod_pool_info, index,
 321                                       lod->lod_osts_size);
 322                 if (rc) {
 323                         CERROR("%s: can't set up pool, failed with %d\n",
 324                                obd->obd_name, rc);
 325                         GOTO(out_mutex, rc);
 326                 }
 327
 328                 rc = qos_add_tgt(lod, tgt_desc);
 329                 if (rc) {
 330                         CERROR("%s: qos_add_tgt failed with %d\n",
 331                                 obd->obd_name, rc);
 332                         GOTO(out_pool, rc);
 333                 }
 334
 335                 /* The new OST is now a full citizen */
 336                 if (index >= lod->lod_desc.ld_tgt_count)
 337                         lod->lod_desc.ld_tgt_count = index + 1;
 338                 if (active)
 339                         lod->lod_desc.ld_active_tgt_count++;
 340         }
 341
 342         LTD_TGT(ltd, index) = tgt_desc;
 343         cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
 344         ltd->ltd_tgtnr++;
 345         mutex_unlock(&ltd->ltd_mutex);
 346         lod_putref(lod, ltd);
 347         if (lod->lod_recovery_completed)
 348                 ldev->ld_ops->ldo_recovery_complete(env, ldev);
 349
 350         RETURN(0);
 351
 352 out_pool:
 353         lod_ost_pool_remove(&lod->lod_pool_info, index);
 354 out_mutex:
 355         mutex_unlock(&ltd->ltd_mutex);
 356         lod_putref(lod, ltd);
 357 out_desc:
 358         OBD_FREE_PTR(tgt_desc);
 359 out_conn:
 360         obd_disconnect(exp);
 361 out_free:
 362         return rc;
 363 }
 364
 365 /*
 366  * helper function to schedule OST removal from the device table
 367  */
 368 static void __lod_del_device(struct lod_tgt_descs *ltd,
 369                              unsigned idx)
 370 {
 371         LASSERT(LTD_TGT(ltd, idx));
 372         if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
 373                 LTD_TGT(ltd, idx)->ltd_reap = 1;
 374                 ltd->ltd_death_row++;
 375         }
 376 }
 377
 378 int lod_fini_tgt(struct lod_device *lod, struct lod_tgt_descs *ltd)
 379 {
 380         int idx;
 381
 382         if (ltd->ltd_tgts_size <= 0)
 383                 return 0;
 384         lod_getref(ltd);
 385         mutex_lock(&ltd->ltd_mutex);
 386         cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
 387                 __lod_del_device(ltd, idx);
 388         mutex_unlock(&ltd->ltd_mutex);
 389         lod_putref(lod, ltd);
 390         CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
 391         for (idx = 0; idx < TGT_PTRS; idx++) {
 392                 if (ltd->ltd_tgt_idx[idx])
 393                         OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
 394         }
 395         ltd->ltd_tgts_size = 0;
 396         return 0;
 397 }
 398
 399 /*
 400  * Add support for administratively disabled OST (through the MGS).
 401  * Schedule a target for deletion.  Disconnection and real removal from the
 402  * table takes place in lod_putref() once the last table user release its
 403  * reference.
 404  *
 405  * \param env - is the environment passed by the caller
 406  * \param lod - is the lod device currently connected to the OSP about to be
 407  *              removed
 408  * \param osp - is the name of OSP device about to be removed
 409  * \param idx - is the OSP index
 410  * \param gen - is the generation number, not used currently
 411  */
 412 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
 413                    struct lod_tgt_descs *ltd, char *osp, unsigned idx,
 414                    unsigned gen)
 415 {
 416         struct obd_device *obd;
 417         int                rc = 0;
 418         struct obd_uuid    uuid;
 419         ENTRY;
 420
 421         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
 422
 423         obd_str2uuid(&uuid, osp);
 424
 425         obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
 426                                    &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 427         if (obd == NULL) {
 428                 CERROR("can't find %s device\n", osp);
 429                 RETURN(-EINVAL);
 430         }
 431
 432         if (gen <= 0) {
 433                 CERROR("%s: request to remove OBD %s with invalid generation %d"
 434                        "\n", obd->obd_name, osp, gen);
 435                 RETURN(-EINVAL);
 436         }
 437
 438         obd_str2uuid(&uuid,  osp);
 439
 440         lod_getref(ltd);
 441         mutex_lock(&ltd->ltd_mutex);
 442         /* check that the index is allocated in the bitmap */
 443         if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
 444             !LTD_TGT(ltd, idx)) {
 445                 CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
 446                 GOTO(out, rc = -EINVAL);
 447         }
 448
 449         /* check that the UUID matches */
 450         if (!obd_uuid_equals(&uuid, &LTD_TGT(ltd, idx)->ltd_uuid)) {
 451                 CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
 452                        obd->obd_name, obd_uuid2str(&LTD_TGT(ltd,idx)->ltd_uuid),
 453                        idx, osp);
 454                 GOTO(out, rc = -EINVAL);
 455         }
 456
 457         __lod_del_device(ltd, idx);
 458         EXIT;
 459 out:
 460         mutex_unlock(&ltd->ltd_mutex);
 461         lod_putref(lod, ltd);
 462         return(rc);
 463 }
 464
 465 int lod_ea_store_resize(struct lod_thread_info *info, int size)
 466 {
 467         int round = size_roundup_power2(size);
 468
 469         LASSERT(round <= lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
 470         if (info->lti_ea_store) {
 471                 LASSERT(info->lti_ea_store_size);
 472                 LASSERT(info->lti_ea_store_size < round);
 473                 CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
 474                        info->lti_ea_store_size, round);
 475                 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
 476                 info->lti_ea_store = NULL;
 477                 info->lti_ea_store_size = 0;
 478         }
 479
 480         OBD_ALLOC_LARGE(info->lti_ea_store, round);
 481         if (info->lti_ea_store == NULL)
 482                 RETURN(-ENOMEM);
 483         info->lti_ea_store_size = round;
 484         RETURN(0);
 485 }
 486
 487 /*
 488  * generate and write LOV EA for given striped object
 489  */
 490 int lod_generate_and_set_lovea(const struct lu_env *env,
 491                                struct lod_object *lo, struct thandle *th)
 492 {
 493         struct lod_thread_info  *info = lod_env_info(env);
 494         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 495         const struct lu_fid     *fid  = lu_object_fid(&lo->ldo_obj.do_lu);
 496         struct lov_mds_md_v1    *lmm;
 497         struct lov_ost_data_v1  *objs;
 498         __u32                    magic;
 499         int                      i, rc, lmm_size;
 500         int                      cplen = 0;
 501         ENTRY;
 502
 503         LASSERT(lo);
 504
 505         magic = lo->ldo_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
 506         lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic);
 507         if (info->lti_ea_store_size < lmm_size) {
 508                 rc = lod_ea_store_resize(info, lmm_size);
 509                 if (rc)
 510                         RETURN(rc);
 511         }
 512
 513         if (lo->ldo_pattern == 0) /* default striping */
 514                 lo->ldo_pattern = LOV_PATTERN_RAID0;
 515
 516         lmm = info->lti_ea_store;
 517
 518         lmm->lmm_magic = cpu_to_le32(magic);
 519         lmm->lmm_pattern = cpu_to_le32(lo->ldo_pattern);
 520         fid_to_lmm_oi(fid, &lmm->lmm_oi);
 521         lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
 522         lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size);
 523         lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr);
 524         if (lo->ldo_pattern & LOV_PATTERN_F_RELEASED)
 525                 lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_released_stripenr);
 526         lmm->lmm_layout_gen = 0;
 527         if (magic == LOV_MAGIC_V1) {
 528                 objs = &lmm->lmm_objects[0];
 529         } else {
 530                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 531                 cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 532                                 sizeof(v3->lmm_pool_name));
 533                 if (cplen >= sizeof(v3->lmm_pool_name))
 534                         RETURN(-E2BIG);
 535                 objs = &v3->lmm_objects[0];
 536         }
 537
 538         for (i = 0; i < lo->ldo_stripenr; i++) {
 539                 const struct lu_fid     *fid;
 540                 struct lod_device       *lod;
 541                 __u32                   index;
 542
 543                 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 544                 LASSERT(lo->ldo_stripe[i]);
 545                 fid = lu_object_fid(&lo->ldo_stripe[i]->do_lu);
 546
 547                 rc = fid_to_ostid(fid, &info->lti_ostid);
 548                 LASSERT(rc == 0);
 549
 550                 ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
 551                 objs[i].l_ost_gen    = cpu_to_le32(0);
 552                 rc = lod_fld_lookup(env, lod, fid, &index, LU_SEQ_RANGE_OST);
 553                 if (rc < 0) {
 554                         CERROR("%s: Can not locate "DFID": rc = %d\n",
 555                                lod2obd(lod)->obd_name, PFID(fid), rc);
 556                         RETURN(rc);
 557                 }
 558                 objs[i].l_ost_idx = cpu_to_le32(index);
 559         }
 560
 561         info->lti_buf.lb_buf = lmm;
 562         info->lti_buf.lb_len = lmm_size;
 563         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0,
 564                           th, BYPASS_CAPA);
 565
 566         RETURN(rc);
 567 }
 568
 569 int lod_get_lov_ea(const struct lu_env *env, struct lod_object *lo)
 570 {
 571         struct lod_thread_info *info = lod_env_info(env);
 572         struct dt_object       *next = dt_object_child(&lo->ldo_obj);
 573         int                     rc;
 574         ENTRY;
 575
 576         LASSERT(info);
 577
 578         if (unlikely(info->lti_ea_store_size == 0)) {
 579                 /* just to enter in allocation block below */
 580                 rc = -ERANGE;
 581         } else {
 582 repeat:
 583                 info->lti_buf.lb_buf = info->lti_ea_store;
 584                 info->lti_buf.lb_len = info->lti_ea_store_size;
 585                 rc = dt_xattr_get(env, next, &info->lti_buf, XATTR_NAME_LOV,
 586                                   BYPASS_CAPA);
 587         }
 588         /* if object is not striped or inaccessible */
 589         if (rc == -ENODATA)
 590                 RETURN(0);
 591
 592         if (rc == -ERANGE) {
 593                 /* EA doesn't fit, reallocate new buffer */
 594                 rc = dt_xattr_get(env, next, &LU_BUF_NULL, XATTR_NAME_LOV,
 595                                   BYPASS_CAPA);
 596                 if (rc == -ENODATA)
 597                         RETURN(0);
 598                 else if (rc < 0)
 599                         RETURN(rc);
 600
 601                 LASSERT(rc > 0);
 602                 rc = lod_ea_store_resize(info, rc);
 603                 if (rc)
 604                         RETURN(rc);
 605                 goto repeat;
 606         }
 607
 608         RETURN(rc);
 609 }
 610
 611 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
 612                            struct thandle *th)
 613 {
 614         struct lod_thread_info  *info = lod_env_info(env);
 615         struct lod_object       *lo = lod_dt_obj(dt);
 616         struct dt_object        *next = dt_object_child(dt);
 617         struct lov_user_md_v3   *v3;
 618         int                      rc;
 619         int                      cplen = 0;
 620         ENTRY;
 621
 622         LASSERT(S_ISDIR(dt->do_lu.lo_header->loh_attr));
 623
 624         /*
 625          * store striping defaults into new directory
 626          * used to implement defaults inheritance
 627          */
 628
 629         /* probably nothing to inherite */
 630         if (lo->ldo_striping_cached == 0)
 631                 RETURN(0);
 632
 633         if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, lo->ldo_def_stripenr,
 634                                 lo->ldo_def_stripe_offset))
 635                 RETURN(0);
 636
 637         /* XXX: use thread info */
 638         OBD_ALLOC_PTR(v3);
 639         if (v3 == NULL)
 640                 RETURN(-ENOMEM);
 641
 642         v3->lmm_magic = cpu_to_le32(LOV_MAGIC_V3);
 643         v3->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
 644         v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
 645         v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr);
 646         v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
 647         if (lo->ldo_pool) {
 648                 cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 649                                 sizeof(v3->lmm_pool_name));
 650                 if (cplen >= sizeof(v3->lmm_pool_name)) {
 651                         OBD_FREE_PTR(v3);
 652                         RETURN(-E2BIG);
 653                 }
 654         }
 655
 656         info->lti_buf.lb_buf = v3;
 657         info->lti_buf.lb_len = sizeof(*v3);
 658         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, th,
 659                         BYPASS_CAPA);
 660
 661         OBD_FREE_PTR(v3);
 662
 663         RETURN(rc);
 664 }
 665
 666 /*
 667  * allocate array of objects pointers, find/create objects
 668  * stripenr and other fields should be initialized by this moment
 669  */
 670 int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
 671                            struct lov_ost_data_v1 *objs)
 672 {
 673         struct lod_thread_info  *info = lod_env_info(env);
 674         struct lod_device       *md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 675         struct lu_object        *o, *n;
 676         struct lu_device        *nd;
 677         struct dt_object       **stripe;
 678         int                      stripe_len;
 679         int                      i, idx, rc = 0;
 680         ENTRY;
 681
 682         LASSERT(lo != NULL);
 683         LASSERT(lo->ldo_stripe == NULL);
 684         LASSERT(lo->ldo_stripenr > 0);
 685         LASSERT(lo->ldo_stripe_size > 0);
 686
 687         stripe_len = lo->ldo_stripenr;
 688         OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
 689         if (stripe == NULL)
 690                 RETURN(-ENOMEM);
 691
 692         for (i = 0; i < lo->ldo_stripenr; i++) {
 693                 ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
 694                 idx = le64_to_cpu(objs[i].l_ost_idx);
 695                 rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
 696                 if (rc != 0)
 697                         GOTO(out, rc);
 698                 LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
 699                          PFID(&info->lti_fid));
 700                 /*
 701                  * XXX: assertion is left for testing, to make
 702                  * sure we never process requests till configuration
 703                  * is completed. to be changed to -EINVAL
 704                  */
 705
 706                 lod_getref(&md->lod_ost_descs);
 707                 LASSERT(cfs_bitmap_check(md->lod_ost_bitmap, idx));
 708                 LASSERT(OST_TGT(md,idx));
 709                 LASSERTF(OST_TGT(md,idx)->ltd_ost, "idx %d\n", idx);
 710                 nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
 711                 lod_putref(md, &md->lod_ost_descs);
 712
 713                 /* In the function below, .hs_keycmp resolves to
 714                  * u_obj_hop_keycmp() */
 715                 /* coverity[overrun-buffer-val] */
 716                 o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
 717                 if (IS_ERR(o))
 718                         GOTO(out, rc = PTR_ERR(o));
 719
 720                 n = lu_object_locate(o->lo_header, nd->ld_type);
 721                 LASSERT(n);
 722
 723                 stripe[i] = container_of(n, struct dt_object, do_lu);
 724         }
 725
 726 out:
 727         if (rc != 0) {
 728                 for (i = 0; i < stripe_len; i++)
 729                         if (stripe[i] != NULL)
 730                                 lu_object_put(env, &stripe[i]->do_lu);
 731
 732                 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
 733         } else {
 734                 lo->ldo_stripe = stripe;
 735                 lo->ldo_stripes_allocated = stripe_len;
 736         }
 737
 738         RETURN(rc);
 739 }
 740
 741 /*
 742  * Parse striping information stored in lti_ea_store
 743  */
 744 int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
 745                        const struct lu_buf *buf)
 746 {
 747         struct lov_mds_md_v1    *lmm;
 748         struct lov_ost_data_v1  *objs;
 749         __u32                    magic;
 750         __u32                    pattern;
 751         int                      rc = 0;
 752         ENTRY;
 753
 754         LASSERT(buf);
 755         LASSERT(buf->lb_buf);
 756         LASSERT(buf->lb_len);
 757
 758         lmm = (struct lov_mds_md_v1 *) buf->lb_buf;
 759         magic = le32_to_cpu(lmm->lmm_magic);
 760         pattern = le32_to_cpu(lmm->lmm_pattern);
 761
 762         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 763                 GOTO(out, rc = -EINVAL);
 764         if (lov_pattern(pattern) != LOV_PATTERN_RAID0)
 765                 GOTO(out, rc = -EINVAL);
 766
 767         lo->ldo_pattern = pattern;
 768         lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 769         lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 770         lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count);
 771         /* released file stripenr fixup. */
 772         if (pattern & LOV_PATTERN_F_RELEASED)
 773                 lo->ldo_stripenr = 0;
 774
 775         LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic));
 776
 777         if (magic == LOV_MAGIC_V3) {
 778                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 779                 objs = &v3->lmm_objects[0];
 780                 lod_object_set_pool(lo, v3->lmm_pool_name);
 781         } else {
 782                 objs = &lmm->lmm_objects[0];
 783         }
 784
 785         if (lo->ldo_stripenr > 0)
 786                 rc = lod_initialize_objects(env, lo, objs);
 787
 788 out:
 789         RETURN(rc);
 790 }
 791
 792 /*
 793  * Load and parse striping information, create in-core representation for the
 794  * stripes
 795  */
 796 int lod_load_striping(const struct lu_env *env, struct lod_object *lo)
 797 {
 798         struct lod_thread_info  *info = lod_env_info(env);
 799         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 800         int                      rc;
 801         ENTRY;
 802
 803         /*
 804          * currently this code is supposed to be called from declaration
 805          * phase only, thus the object is not expected to be locked by caller
 806          */
 807         dt_write_lock(env, next, 0);
 808         /* already initialized? */
 809         if (lo->ldo_stripe) {
 810                 int i;
 811                 /* check validity */
 812                 for (i = 0; i < lo->ldo_stripenr; i++)
 813                         LASSERTF(lo->ldo_stripe[i], "stripe %d is NULL\n", i);
 814                 GOTO(out, rc = 0);
 815         }
 816
 817         if (!dt_object_exists(next))
 818                 GOTO(out, rc = 0);
 819
 820         /* only regular files can be striped */
 821         if (!(lu_object_attr(lod2lu_obj(lo)) & S_IFREG))
 822                 GOTO(out, rc = 0);
 823
 824         LASSERT(lo->ldo_stripenr == 0);
 825
 826         rc = lod_get_lov_ea(env, lo);
 827         if (rc <= 0)
 828                 GOTO(out, rc);
 829
 830         /*
 831          * there is LOV EA (striping information) in this object
 832          * let's parse it and create in-core objects for the stripes
 833          */
 834         info->lti_buf.lb_buf = info->lti_ea_store;
 835         info->lti_buf.lb_len = info->lti_ea_store_size;
 836         rc = lod_parse_striping(env, lo, &info->lti_buf);
 837 out:
 838         dt_write_unlock(env, next);
 839         RETURN(rc);
 840 }
 841
 842 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
 843                         int specific)
 844 {
 845         struct lov_user_md_v1   *lum;
 846         struct lov_user_md_v3   *lum3;
 847         struct pool_desc        *pool = NULL;
 848         __u32                    magic;
 849         __u32                    stripe_size;
 850         __u16                    stripe_count;
 851         __u16                    stripe_offset;
 852         size_t                   lum_size;
 853         int                      rc = 0;
 854         ENTRY;
 855
 856         lum = buf->lb_buf;
 857
 858         LASSERT(sizeof(*lum) < sizeof(*lum3));
 859
 860         if (buf->lb_len < sizeof(*lum)) {
 861                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md\n",
 862                        buf->lb_len);
 863                 GOTO(out, rc = -EINVAL);
 864         }
 865
 866         magic = le32_to_cpu(lum->lmm_magic);
 867         if (magic != LOV_USER_MAGIC_V1 &&
 868             magic != LOV_USER_MAGIC_V3 &&
 869             magic != LOV_MAGIC_V1_DEF &&
 870             magic != LOV_MAGIC_V3_DEF) {
 871                 CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
 872                 GOTO(out, rc = -EINVAL);
 873         }
 874
 875         if ((specific && le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) ||
 876             (!specific && lum->lmm_pattern != 0)) {
 877                 CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
 878                        le32_to_cpu(lum->lmm_pattern));
 879                 GOTO(out, rc = -EINVAL);
 880         }
 881
 882         /* 64kB is the largest common page size we see (ia64), and matches the
 883          * check in lfs */
 884         stripe_size = le32_to_cpu(lum->lmm_stripe_size);
 885         if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
 886                 CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
 887                        stripe_size, LOV_MIN_STRIPE_SIZE);
 888                 GOTO(out, rc = -EINVAL);
 889         }
 890
 891         /* an offset of -1 is treated as a "special" valid offset */
 892         stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
 893         if (stripe_offset != (typeof(stripe_offset))-1) {
 894                 /* if offset is not within valid range [0, osts_size) */
 895                 if (stripe_offset >= d->lod_osts_size) {
 896                         CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
 897                                stripe_offset, d->lod_osts_size);
 898                         GOTO(out, rc = -EINVAL);
 899                 }
 900
 901                 /* if lmm_stripe_offset is *not* in bitmap */
 902                 if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
 903                         CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
 904                                stripe_offset);
 905                         GOTO(out, rc = -EINVAL);
 906                 }
 907         }
 908
 909         stripe_count = le16_to_cpu(lum->lmm_stripe_count);
 910         if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
 911                 lum_size = offsetof(struct lov_user_md_v1,
 912                                     lmm_objects[stripe_count]);
 913         else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
 914                 lum_size = offsetof(struct lov_user_md_v3,
 915                                     lmm_objects[stripe_count]);
 916         else
 917                 LBUG();
 918
 919         if (specific && buf->lb_len != lum_size) {
 920                 CDEBUG(D_IOCTL, "invalid buf len %zd for lov_user_md with "
 921                        "magic %#x and stripe_count %u\n",
 922                        buf->lb_len, magic, stripe_count);
 923                 GOTO(out, rc = -EINVAL);
 924         }
 925
 926         if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
 927                 goto out;
 928
 929         lum3 = buf->lb_buf;
 930         if (buf->lb_len < sizeof(*lum3)) {
 931                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md_v3\n",
 932                        buf->lb_len);
 933                 GOTO(out, rc = -EINVAL);
 934         }
 935
 936         /* In the function below, .hs_keycmp resolves to
 937          * pool_hashkey_keycmp() */
 938         /* coverity[overrun-buffer-val] */
 939         pool = lod_find_pool(d, lum3->lmm_pool_name);
 940         if (pool == NULL)
 941                 goto out;
 942
 943         if (stripe_offset != (typeof(stripe_offset))-1) {
 944                 rc = lod_check_index_in_pool(stripe_offset, pool);
 945                 if (rc < 0)
 946                         GOTO(out, rc = -EINVAL);
 947         }
 948
 949         if (specific && stripe_count > pool_tgt_count(pool)) {
 950                 CDEBUG(D_IOCTL,
 951                        "stripe count %u > # OSTs %u in the pool\n",
 952                        stripe_count, pool_tgt_count(pool));
 953                 GOTO(out, rc = -EINVAL);
 954         }
 955
 956 out:
 957         if (pool != NULL)
 958                 lod_pool_putref(pool);
 959
 960         RETURN(rc);
 961 }
 962
 963 void lod_fix_desc_stripe_size(__u64 *val)
 964 {
 965         if (*val < LOV_MIN_STRIPE_SIZE) {
 966                 if (*val != 0)
 967                         LCONSOLE_INFO("Increasing default stripe size to "
 968                                       "minimum value %u\n",
 969                                       LOV_DEFAULT_STRIPE_SIZE);
 970                 *val = LOV_DEFAULT_STRIPE_SIZE;
 971         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 972                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 973                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 974                               "multiple of %u)\n",
 975                               *val, LOV_MIN_STRIPE_SIZE);
 976         }
 977 }
 978
 979 void lod_fix_desc_stripe_count(__u32 *val)
 980 {
 981         if (*val == 0)
 982                 *val = 1;
 983 }
 984
 985 void lod_fix_desc_pattern(__u32 *val)
 986 {
 987         /* from lov_setstripe */
 988         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 989                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 990                 *val = 0;
 991         }
 992 }
 993
 994 void lod_fix_desc_qos_maxage(__u32 *val)
 995 {
 996         /* fix qos_maxage */
 997         if (*val == 0)
 998                 *val = QOS_DEFAULT_MAXAGE;
 999 }
1000
1001 void lod_fix_desc(struct lov_desc *desc)
1002 {
1003         lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
1004         lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
1005         lod_fix_desc_pattern(&desc->ld_pattern);
1006         lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
1007 }
1008
1009 int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
1010 {
1011         struct obd_device          *obd;
1012         struct lov_desc            *desc;
1013         int                         rc;
1014         ENTRY;
1015
1016         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1017         LASSERT(obd != NULL);
1018         obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
1019
1020         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1021                 CERROR("LOD setup requires a descriptor\n");
1022                 RETURN(-EINVAL);
1023         }
1024
1025         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
1026
1027         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1028                 CERROR("descriptor size wrong: %d > %d\n",
1029                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1030                 RETURN(-EINVAL);
1031         }
1032
1033         if (desc->ld_magic != LOV_DESC_MAGIC) {
1034                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
1035                         CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
1036                                obd->obd_name, desc);
1037                         lustre_swab_lov_desc(desc);
1038                 } else {
1039                         CERROR("%s: Bad lov desc magic: %#x\n",
1040                                obd->obd_name, desc->ld_magic);
1041                         RETURN(-EINVAL);
1042                 }
1043         }
1044
1045         lod_fix_desc(desc);
1046
1047         desc->ld_active_tgt_count = 0;
1048         lod->lod_desc = *desc;
1049
1050         lod->lod_sp_me = LUSTRE_SP_CLI;
1051
1052         /* Set up allocation policy (QoS and RR) */
1053         CFS_INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list);
1054         init_rwsem(&lod->lod_qos.lq_rw_sem);
1055         lod->lod_qos.lq_dirty = 1;
1056         lod->lod_qos.lq_rr.lqr_dirty = 1;
1057         lod->lod_qos.lq_reset = 1;
1058         /* Default priority is toward free space balance */
1059         lod->lod_qos.lq_prio_free = 232;
1060         /* Default threshold for rr (roughly 17%) */
1061         lod->lod_qos.lq_threshold_rr = 43;
1062         /* Init statfs fields */
1063         OBD_ALLOC_PTR(lod->lod_qos.lq_statfs_data);
1064         if (NULL == lod->lod_qos.lq_statfs_data)
1065                 RETURN(-ENOMEM);
1066         cfs_waitq_init(&lod->lod_qos.lq_statfs_waitq);
1067
1068         /* Set up OST pool environment */
1069         lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
1070                                                    HASH_POOLS_MAX_BITS,
1071                                                    HASH_POOLS_BKT_BITS, 0,
1072                                                    CFS_HASH_MIN_THETA,
1073                                                    CFS_HASH_MAX_THETA,
1074                                                    &pool_hash_operations,
1075                                                    CFS_HASH_DEFAULT);
1076         if (!lod->lod_pools_hash_body)
1077                 GOTO(out_statfs, rc = -ENOMEM);
1078         CFS_INIT_LIST_HEAD(&lod->lod_pool_list);
1079         lod->lod_pool_count = 0;
1080         rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
1081         if (rc)
1082                 GOTO(out_hash, rc);
1083         rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
1084         if (rc)
1085                 GOTO(out_pool_info, rc);
1086
1087         RETURN(0);
1088
1089 out_pool_info:
1090         lod_ost_pool_free(&lod->lod_pool_info);
1091 out_hash:
1092         cfs_hash_putref(lod->lod_pools_hash_body);
1093 out_statfs:
1094         OBD_FREE_PTR(lod->lod_qos.lq_statfs_data);
1095         return rc;
1096 }
1097
1098 int lod_pools_fini(struct lod_device *lod)
1099 {
1100         struct obd_device   *obd = lod2obd(lod);
1101         cfs_list_t          *pos, *tmp;
1102         struct pool_desc    *pool;
1103         ENTRY;
1104
1105         cfs_list_for_each_safe(pos, tmp, &lod->lod_pool_list) {
1106                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
1107                 /* free pool structs */
1108                 CDEBUG(D_INFO, "delete pool %p\n", pool);
1109                 /* In the function below, .hs_keycmp resolves to
1110                  * pool_hashkey_keycmp() */
1111                 /* coverity[overrun-buffer-val] */
1112                 lod_pool_del(obd, pool->pool_name);
1113         }
1114
1115         cfs_hash_putref(lod->lod_pools_hash_body);
1116         lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
1117         lod_ost_pool_free(&lod->lod_pool_info);
1118         OBD_FREE_PTR(lod->lod_qos.lq_statfs_data);
1119         RETURN(0);
1120 }
1121