lustre/lfsck/lfsck_engine.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 (c) 2012, 2013, Intel Corporation.
  24  */
  25 /*
  26  * lustre/lfsck/lfsck_engine.c
  27  *
  28  * Author: Fan, Yong <fan.yong@intel.com>
  29  */
  30
  31 #define DEBUG_SUBSYSTEM S_LFSCK
  32
  33 #include <lu_object.h>
  34 #include <dt_object.h>
  35 #include <lustre_net.h>
  36 #include <lustre_fid.h>
  37 #include <obd_support.h>
  38 #include <lustre_lib.h>
  39
  40 #include "lfsck_internal.h"
  41
  42 static void lfsck_unpack_ent(struct lu_dirent *ent, __u64 *cookie)
  43 {
  44         fid_le_to_cpu(&ent->lde_fid, &ent->lde_fid);
  45         *cookie = le64_to_cpu(ent->lde_hash);
  46         ent->lde_reclen = le16_to_cpu(ent->lde_reclen);
  47         ent->lde_namelen = le16_to_cpu(ent->lde_namelen);
  48         ent->lde_attrs = le32_to_cpu(ent->lde_attrs);
  49
  50         /* Make sure the name is terminated with '0'.
  51          * The data (type) after ent::lde_name maybe
  52          * broken, but we do not care. */
  53         ent->lde_name[ent->lde_namelen] = 0;
  54 }
  55
  56 static void lfsck_di_oit_put(const struct lu_env *env, struct lfsck_instance *lfsck)
  57 {
  58         const struct dt_it_ops  *iops;
  59         struct dt_it            *di;
  60
  61         spin_lock(&lfsck->li_lock);
  62         iops = &lfsck->li_obj_oit->do_index_ops->dio_it;
  63         di = lfsck->li_di_oit;
  64         lfsck->li_di_oit = NULL;
  65         spin_unlock(&lfsck->li_lock);
  66         iops->put(env, di);
  67 }
  68
  69 static void lfsck_di_dir_put(const struct lu_env *env, struct lfsck_instance *lfsck)
  70 {
  71         const struct dt_it_ops  *iops;
  72         struct dt_it            *di;
  73
  74         spin_lock(&lfsck->li_lock);
  75         iops = &lfsck->li_obj_dir->do_index_ops->dio_it;
  76         di = lfsck->li_di_dir;
  77         lfsck->li_di_dir = NULL;
  78         lfsck->li_cookie_dir = 0;
  79         spin_unlock(&lfsck->li_lock);
  80         iops->put(env, di);
  81 }
  82
  83 static void lfsck_close_dir(const struct lu_env *env,
  84                             struct lfsck_instance *lfsck)
  85 {
  86         struct dt_object        *dir_obj  = lfsck->li_obj_dir;
  87         const struct dt_it_ops  *dir_iops = &dir_obj->do_index_ops->dio_it;
  88         struct dt_it            *dir_di   = lfsck->li_di_dir;
  89
  90         lfsck_di_dir_put(env, lfsck);
  91         dir_iops->fini(env, dir_di);
  92         lfsck->li_obj_dir = NULL;
  93         lfsck_object_put(env, dir_obj);
  94 }
  95
  96 static int lfsck_update_lma(const struct lu_env *env,
  97                             struct lfsck_instance *lfsck, struct dt_object *obj)
  98 {
  99         struct lfsck_thread_info        *info   = lfsck_env_info(env);
 100         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
 101         struct dt_device                *dt     = lfsck->li_bottom;
 102         struct lustre_mdt_attrs         *lma    = &info->lti_lma;
 103         struct lu_buf                   *buf;
 104         struct thandle                  *th;
 105         int                              fl;
 106         int                              rc;
 107         ENTRY;
 108
 109         if (bk->lb_param & LPF_DRYRUN)
 110                 RETURN(0);
 111
 112         buf = lfsck_buf_get(env, info->lti_lma_old, LMA_OLD_SIZE);
 113         rc = dt_xattr_get(env, obj, buf, XATTR_NAME_LMA, BYPASS_CAPA);
 114         if (rc < 0) {
 115                 if (rc != -ENODATA)
 116                         RETURN(rc);
 117
 118                 fl = LU_XATTR_CREATE;
 119                 lustre_lma_init(lma, lfsck_dto2fid(obj), LMAC_FID_ON_OST, 0);
 120         } else {
 121                 if (rc != LMA_OLD_SIZE && rc != sizeof(struct lustre_mdt_attrs))
 122                         RETURN(-EINVAL);
 123
 124                 fl = LU_XATTR_REPLACE;
 125                 lustre_lma_swab(lma);
 126                 lustre_lma_init(lma, lfsck_dto2fid(obj),
 127                                 lma->lma_compat | LMAC_FID_ON_OST,
 128                                 lma->lma_incompat);
 129         }
 130         lustre_lma_swab(lma);
 131
 132         th = dt_trans_create(env, dt);
 133         if (IS_ERR(th))
 134                 RETURN(PTR_ERR(th));
 135
 136         buf = lfsck_buf_get(env, lma, sizeof(*lma));
 137         rc = dt_declare_xattr_set(env, obj, buf, XATTR_NAME_LMA, fl, th);
 138         if (rc != 0)
 139                 GOTO(stop, rc);
 140
 141         rc = dt_trans_start(env, dt, th);
 142         if (rc != 0)
 143                 GOTO(stop, rc);
 144
 145         rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LMA, fl, th, BYPASS_CAPA);
 146
 147         GOTO(stop, rc);
 148
 149 stop:
 150         dt_trans_stop(env, dt, th);
 151         return rc;
 152 }
 153
 154 static int lfsck_master_dir_engine(const struct lu_env *env,
 155                                    struct lfsck_instance *lfsck)
 156 {
 157         struct lfsck_thread_info        *info   = lfsck_env_info(env);
 158         const struct dt_it_ops          *iops   =
 159                         &lfsck->li_obj_dir->do_index_ops->dio_it;
 160         struct dt_it                    *di     = lfsck->li_di_dir;
 161         struct lu_dirent                *ent    = &info->lti_ent;
 162         struct lu_fid                   *fid    = &info->lti_fid;
 163         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
 164         struct ptlrpc_thread            *thread = &lfsck->li_thread;
 165         int                              rc;
 166         ENTRY;
 167
 168         do {
 169                 struct dt_object *child;
 170
 171                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY2) &&
 172                     cfs_fail_val > 0) {
 173                         struct l_wait_info lwi;
 174
 175                         lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
 176                                           NULL, NULL);
 177                         l_wait_event(thread->t_ctl_waitq,
 178                                      !thread_is_running(thread),
 179                                      &lwi);
 180                 }
 181
 182                 lfsck->li_new_scanned++;
 183                 rc = iops->rec(env, di, (struct dt_rec *)ent,
 184                                lfsck->li_args_dir);
 185                 lfsck_unpack_ent(ent, &lfsck->li_cookie_dir);
 186                 if (rc != 0) {
 187                         lfsck_fail(env, lfsck, true);
 188                         if (bk->lb_param & LPF_FAILOUT)
 189                                 RETURN(rc);
 190                         else
 191                                 goto checkpoint;
 192                 }
 193
 194                 if (ent->lde_attrs & LUDA_IGNORE)
 195                         goto checkpoint;
 196
 197                 *fid = ent->lde_fid;
 198                 child = lfsck_object_find(env, lfsck, fid);
 199                 if (child == NULL) {
 200                         goto checkpoint;
 201                 } else if (IS_ERR(child)) {
 202                         lfsck_fail(env, lfsck, true);
 203                         if (bk->lb_param & LPF_FAILOUT)
 204                                 RETURN(PTR_ERR(child));
 205                         else
 206                                 goto checkpoint;
 207                 }
 208
 209                 /* XXX: Currently, skip remote object, the consistency for
 210                  *      remote object will be processed in LFSCK phase III. */
 211                 if (dt_object_exists(child) && !dt_object_remote(child))
 212                         rc = lfsck_exec_dir(env, lfsck, child, ent);
 213                 lfsck_object_put(env, child);
 214                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
 215                         RETURN(rc);
 216
 217 checkpoint:
 218                 rc = lfsck_checkpoint(env, lfsck);
 219                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
 220                         RETURN(rc);
 221
 222                 /* Rate control. */
 223                 lfsck_control_speed(lfsck);
 224                 if (unlikely(!thread_is_running(thread)))
 225                         RETURN(0);
 226
 227                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_FATAL2)) {
 228                         spin_lock(&lfsck->li_lock);
 229                         thread_set_flags(thread, SVC_STOPPING);
 230                         spin_unlock(&lfsck->li_lock);
 231                         RETURN(-EINVAL);
 232                 }
 233
 234                 rc = iops->next(env, di);
 235         } while (rc == 0);
 236
 237         if (rc > 0 && !lfsck->li_oit_over)
 238                 lfsck_close_dir(env, lfsck);
 239
 240         RETURN(rc);
 241 }
 242
 243 static int lfsck_master_oit_engine(const struct lu_env *env,
 244                                    struct lfsck_instance *lfsck)
 245 {
 246         struct lfsck_thread_info        *info   = lfsck_env_info(env);
 247         const struct dt_it_ops          *iops   =
 248                                 &lfsck->li_obj_oit->do_index_ops->dio_it;
 249         struct dt_it                    *di     = lfsck->li_di_oit;
 250         struct lu_fid                   *fid    = &info->lti_fid;
 251         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
 252         struct ptlrpc_thread            *thread = &lfsck->li_thread;
 253         __u32                            idx    =
 254                                 lfsck_dev_idx(lfsck->li_bottom);
 255         int                              rc;
 256         ENTRY;
 257
 258         do {
 259                 struct dt_object *target;
 260                 bool              update_lma = false;
 261
 262                 if (lfsck->li_di_dir != NULL) {
 263                         rc = lfsck_master_dir_engine(env, lfsck);
 264                         if (rc <= 0)
 265                                 RETURN(rc);
 266                 }
 267
 268                 if (unlikely(lfsck->li_oit_over))
 269                         RETURN(1);
 270
 271                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY1) &&
 272                     cfs_fail_val > 0) {
 273                         struct l_wait_info lwi;
 274
 275                         lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
 276                                           NULL, NULL);
 277                         l_wait_event(thread->t_ctl_waitq,
 278                                      !thread_is_running(thread),
 279                                      &lwi);
 280                 }
 281
 282                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CRASH))
 283                         RETURN(0);
 284
 285                 lfsck->li_current_oit_processed = 1;
 286                 lfsck->li_new_scanned++;
 287                 rc = iops->rec(env, di, (struct dt_rec *)fid, 0);
 288                 if (rc != 0) {
 289                         lfsck_fail(env, lfsck, true);
 290                         if (rc < 0 && bk->lb_param & LPF_FAILOUT)
 291                                 RETURN(rc);
 292                         else
 293                                 goto checkpoint;
 294                 }
 295
 296                 if (fid_is_idif(fid)) {
 297                         __u32 idx1 = fid_idif_ost_idx(fid);
 298
 299                         LASSERT(!lfsck->li_master);
 300
 301                         /* It is an old format device, update the LMA. */
 302                         if (idx != idx1) {
 303                                 struct ost_id *oi = &info->lti_oi;
 304
 305                                 fid_to_ostid(fid, oi);
 306                                 ostid_to_fid(fid, oi, idx);
 307                                 update_lma = true;
 308                         }
 309                 } else if (!fid_is_norm(fid) && !fid_is_igif(fid) &&
 310                            !fid_is_last_id(fid) && !fid_is_root(fid) &&
 311                            !fid_seq_is_dot(fid_seq(fid))) {
 312                         /* If the FID/object is only used locally and invisible
 313                          * to external nodes, then LFSCK will not handle it. */
 314                         goto checkpoint;
 315                 }
 316
 317                 target = lfsck_object_find(env, lfsck, fid);
 318                 if (target == NULL) {
 319                         goto checkpoint;
 320                 } else if (IS_ERR(target)) {
 321                         lfsck_fail(env, lfsck, true);
 322                         if (bk->lb_param & LPF_FAILOUT)
 323                                 RETURN(PTR_ERR(target));
 324                         else
 325                                 goto checkpoint;
 326                 }
 327
 328                 /* XXX: Currently, skip remote object, the consistency for
 329                  *      remote object will be processed in LFSCK phase III. */
 330                 if (dt_object_exists(target) && !dt_object_remote(target)) {
 331                         if (update_lma)
 332                                 rc = lfsck_update_lma(env, lfsck, target);
 333                         if (rc == 0)
 334                                 rc = lfsck_exec_oit(env, lfsck, target);
 335                 }
 336                 lfsck_object_put(env, target);
 337                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
 338                         RETURN(rc);
 339
 340 checkpoint:
 341                 rc = lfsck_checkpoint(env, lfsck);
 342                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
 343                         RETURN(rc);
 344
 345                 /* Rate control. */
 346                 lfsck_control_speed(lfsck);
 347
 348                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_FATAL1)) {
 349                         spin_lock(&lfsck->li_lock);
 350                         thread_set_flags(thread, SVC_STOPPING);
 351                         spin_unlock(&lfsck->li_lock);
 352                         RETURN(-EINVAL);
 353                 }
 354
 355                 rc = iops->next(env, di);
 356                 if (unlikely(rc > 0))
 357                         lfsck->li_oit_over = 1;
 358                 else if (likely(rc == 0))
 359                         lfsck->li_current_oit_processed = 0;
 360
 361                 if (unlikely(!thread_is_running(thread)))
 362                         RETURN(0);
 363         } while (rc == 0 || lfsck->li_di_dir != NULL);
 364
 365         RETURN(rc);
 366 }
 367
 368 int lfsck_master_engine(void *args)
 369 {
 370         struct lfsck_thread_args *lta      = args;
 371         struct lu_env            *env      = &lta->lta_env;
 372         struct lfsck_instance    *lfsck    = lta->lta_lfsck;
 373         struct ptlrpc_thread     *thread   = &lfsck->li_thread;
 374         struct dt_object         *oit_obj  = lfsck->li_obj_oit;
 375         const struct dt_it_ops   *oit_iops = &oit_obj->do_index_ops->dio_it;
 376         struct dt_it             *oit_di;
 377         int                       rc;
 378         ENTRY;
 379
 380         oit_di = oit_iops->init(env, oit_obj, lfsck->li_args_oit, BYPASS_CAPA);
 381         if (IS_ERR(oit_di)) {
 382                 rc = PTR_ERR(oit_di);
 383                 CERROR("%s: LFSCK, fail to init iteration: rc = %d\n",
 384                        lfsck_lfsck2name(lfsck), rc);
 385
 386                 GOTO(fini_args, rc);
 387         }
 388
 389         spin_lock(&lfsck->li_lock);
 390         lfsck->li_di_oit = oit_di;
 391         spin_unlock(&lfsck->li_lock);
 392         rc = lfsck_prep(env, lfsck, lta->lta_lsp);
 393         if (rc != 0)
 394                 GOTO(fini_oit, rc);
 395
 396         CDEBUG(D_LFSCK, "LFSCK entry: oit_flags = %#x, dir_flags = %#x, "
 397                "oit_cookie = "LPU64", dir_cookie = "LPU64", parent = "DFID
 398                ", pid = %d\n", lfsck->li_args_oit, lfsck->li_args_dir,
 399                lfsck->li_pos_current.lp_oit_cookie,
 400                lfsck->li_pos_current.lp_dir_cookie,
 401                PFID(&lfsck->li_pos_current.lp_dir_parent),
 402                current_pid());
 403
 404         spin_lock(&lfsck->li_lock);
 405         thread_set_flags(thread, SVC_RUNNING);
 406         spin_unlock(&lfsck->li_lock);
 407         wake_up_all(&thread->t_ctl_waitq);
 408
 409         if (!cfs_list_empty(&lfsck->li_list_scan) ||
 410             cfs_list_empty(&lfsck->li_list_double_scan))
 411                 rc = lfsck_master_oit_engine(env, lfsck);
 412         else
 413                 rc = 1;
 414
 415         CDEBUG(D_LFSCK, "LFSCK exit: oit_flags = %#x, dir_flags = %#x, "
 416                "oit_cookie = "LPU64", dir_cookie = "LPU64", parent = "DFID
 417                ", pid = %d, rc = %d\n", lfsck->li_args_oit, lfsck->li_args_dir,
 418                lfsck->li_pos_current.lp_oit_cookie,
 419                lfsck->li_pos_current.lp_dir_cookie,
 420                PFID(&lfsck->li_pos_current.lp_dir_parent),
 421                current_pid(), rc);
 422
 423         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CRASH))
 424                 rc = lfsck_post(env, lfsck, rc);
 425
 426         if (lfsck->li_di_dir != NULL)
 427                 lfsck_close_dir(env, lfsck);
 428
 429 fini_oit:
 430         lfsck_di_oit_put(env, lfsck);
 431         oit_iops->fini(env, oit_di);
 432         if (rc == 1) {
 433                 if (!cfs_list_empty(&lfsck->li_list_double_scan))
 434                         rc = lfsck_double_scan(env, lfsck);
 435                 else
 436                         rc = 0;
 437         } else {
 438                 lfsck_quit(env, lfsck);
 439         }
 440
 441         /* XXX: Purge the pinned objects in the future. */
 442
 443 fini_args:
 444         spin_lock(&lfsck->li_lock);
 445         thread_set_flags(thread, SVC_STOPPED);
 446         spin_unlock(&lfsck->li_lock);
 447         wake_up_all(&thread->t_ctl_waitq);
 448         lfsck_thread_args_fini(lta);
 449         return rc;
 450 }