lustre/obdclass/llog_swab.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/llog_swab.c
  37  *
  38  * Swabbing of llog datatypes (from disk or over the wire).
  39  *
  40  * Author: jacob berkman  <jacob@clusterfs.com>
  41  */
  42
  43 #define DEBUG_SUBSYSTEM S_LOG
  44
  45
  46 #include <lustre_log.h>
  47 #include <lustre_update.h>
  48
  49 static void print_llogd_body(struct llogd_body *d)
  50 {
  51         CDEBUG(D_OTHER, "llogd body: %p\n", d);
  52         CDEBUG(D_OTHER, "\tlgd_logid.lgl_oi: "DOSTID"\n",
  53                POSTID(&d->lgd_logid.lgl_oi));
  54         CDEBUG(D_OTHER, "\tlgd_logid.lgl_ogen: %#x\n", d->lgd_logid.lgl_ogen);
  55         CDEBUG(D_OTHER, "\tlgd_ctxt_idx: %#x\n", d->lgd_ctxt_idx);
  56         CDEBUG(D_OTHER, "\tlgd_llh_flags: %#x\n", d->lgd_llh_flags);
  57         CDEBUG(D_OTHER, "\tlgd_index: %#x\n", d->lgd_index);
  58         CDEBUG(D_OTHER, "\tlgd_saved_index: %#x\n", d->lgd_saved_index);
  59         CDEBUG(D_OTHER, "\tlgd_len: %#x\n", d->lgd_len);
  60         CDEBUG(D_OTHER, "\tlgd_cur_offset: "LPX64"\n", d->lgd_cur_offset);
  61 }
  62
  63 void lustre_swab_lu_fid(struct lu_fid *fid)
  64 {
  65         __swab64s (&fid->f_seq);
  66         __swab32s (&fid->f_oid);
  67         __swab32s (&fid->f_ver);
  68 }
  69 EXPORT_SYMBOL(lustre_swab_lu_fid);
  70
  71 void lustre_swab_ost_id(struct ost_id *oid)
  72 {
  73         if (fid_seq_is_mdt0(oid->oi.oi_seq) ||
  74             fid_seq_is_default(oid->oi.oi_seq)) {
  75                 __swab64s(&oid->oi.oi_id);
  76                 __swab64s(&oid->oi.oi_seq);
  77         } else {
  78                 lustre_swab_lu_fid(&oid->oi_fid);
  79         }
  80 }
  81 EXPORT_SYMBOL(lustre_swab_ost_id);
  82
  83 void lustre_swab_llog_id(struct llog_logid *log_id)
  84 {
  85         __swab64s(&log_id->lgl_oi.oi.oi_id);
  86         __swab64s(&log_id->lgl_oi.oi.oi_seq);
  87         __swab32s(&log_id->lgl_ogen);
  88 }
  89
  90 void lustre_swab_llogd_body (struct llogd_body *d)
  91 {
  92         ENTRY;
  93         print_llogd_body(d);
  94         lustre_swab_llog_id(&d->lgd_logid);
  95         __swab32s (&d->lgd_ctxt_idx);
  96         __swab32s (&d->lgd_llh_flags);
  97         __swab32s (&d->lgd_index);
  98         __swab32s (&d->lgd_saved_index);
  99         __swab32s (&d->lgd_len);
 100         __swab64s (&d->lgd_cur_offset);
 101         print_llogd_body(d);
 102         EXIT;
 103 }
 104 EXPORT_SYMBOL(lustre_swab_llogd_body);
 105
 106 void lustre_swab_llogd_conn_body (struct llogd_conn_body *d)
 107 {
 108         __swab64s (&d->lgdc_gen.mnt_cnt);
 109         __swab64s (&d->lgdc_gen.conn_cnt);
 110         lustre_swab_llog_id(&d->lgdc_logid);
 111         __swab32s (&d->lgdc_ctxt_idx);
 112 }
 113 EXPORT_SYMBOL(lustre_swab_llogd_conn_body);
 114
 115 void lustre_swab_ll_fid(struct ll_fid *fid)
 116 {
 117         __swab64s (&fid->id);
 118         __swab32s (&fid->generation);
 119         __swab32s (&fid->f_type);
 120 }
 121
 122 void lustre_swab_lu_seq_range(struct lu_seq_range *range)
 123 {
 124         __swab64s (&range->lsr_start);
 125         __swab64s (&range->lsr_end);
 126         __swab32s (&range->lsr_index);
 127         __swab32s (&range->lsr_flags);
 128 }
 129 EXPORT_SYMBOL(lustre_swab_lu_seq_range);
 130
 131 void lustre_swab_update_ops(struct update_ops *uops, unsigned int op_count)
 132 {
 133         unsigned int i;
 134         unsigned int j;
 135
 136         for (i = 0; i < op_count; i++) {
 137                 lustre_swab_lu_fid(&uops->uops_op[i].uop_fid);
 138                 __swab16s(&uops->uops_op[i].uop_type);
 139                 __swab16s(&uops->uops_op[i].uop_param_count);
 140                 for (j = 0; j < uops->uops_op[i].uop_param_count; j++)
 141                         __swab16s(&uops->uops_op[i].uop_params_off[j]);
 142         }
 143 }
 144 EXPORT_SYMBOL(lustre_swab_update_ops);
 145
 146 void lustre_swab_llog_rec(struct llog_rec_hdr *rec)
 147 {
 148         struct llog_rec_tail *tail = NULL;
 149
 150         __swab32s(&rec->lrh_len);
 151         __swab32s(&rec->lrh_index);
 152         __swab32s(&rec->lrh_type);
 153         __swab32s(&rec->lrh_id);
 154
 155         switch (rec->lrh_type) {
 156         case OST_SZ_REC:
 157         {
 158                 struct llog_size_change_rec *lsc =
 159                         (struct llog_size_change_rec *)rec;
 160
 161                 lustre_swab_ll_fid(&lsc->lsc_fid);
 162                 __swab32s(&lsc->lsc_ioepoch);
 163                 tail = &lsc->lsc_tail;
 164                 break;
 165         }
 166         case MDS_UNLINK_REC:
 167         {
 168                 struct llog_unlink_rec *lur = (struct llog_unlink_rec *)rec;
 169
 170                 __swab64s(&lur->lur_oid);
 171                 __swab32s(&lur->lur_oseq);
 172                 __swab32s(&lur->lur_count);
 173                 tail = &lur->lur_tail;
 174                 break;
 175         }
 176         case MDS_UNLINK64_REC:
 177         {
 178                 struct llog_unlink64_rec *lur =
 179                         (struct llog_unlink64_rec *)rec;
 180
 181                 lustre_swab_lu_fid(&lur->lur_fid);
 182                 __swab32s(&lur->lur_count);
 183                 tail = &lur->lur_tail;
 184                 break;
 185         }
 186         case CHANGELOG_REC:
 187         {
 188                 struct llog_changelog_rec *cr =
 189                         (struct llog_changelog_rec *)rec;
 190
 191                 __swab16s(&cr->cr.cr_namelen);
 192                 __swab16s(&cr->cr.cr_flags);
 193                 __swab32s(&cr->cr.cr_type);
 194                 __swab64s(&cr->cr.cr_index);
 195                 __swab64s(&cr->cr.cr_prev);
 196                 __swab64s(&cr->cr.cr_time);
 197                 lustre_swab_lu_fid(&cr->cr.cr_tfid);
 198                 lustre_swab_lu_fid(&cr->cr.cr_pfid);
 199                 if (cr->cr.cr_flags & CLF_RENAME) {
 200                         struct changelog_ext_rename *rnm =
 201                                 changelog_rec_rename(&cr->cr);
 202
 203                         lustre_swab_lu_fid(&rnm->cr_sfid);
 204                         lustre_swab_lu_fid(&rnm->cr_spfid);
 205                 }
 206                 /* Because the tail follows a variable-length structure we need
 207                  * to compute its location at runtime */
 208                 tail = (struct llog_rec_tail *)((char *)&cr->cr +
 209                                                 changelog_rec_size(&cr->cr) +
 210                                                 cr->cr.cr_namelen);
 211                 break;
 212         }
 213
 214         case CHANGELOG_USER_REC:
 215         {
 216                 struct llog_changelog_user_rec *cur =
 217                         (struct llog_changelog_user_rec*)rec;
 218
 219                 __swab32s(&cur->cur_id);
 220                 __swab64s(&cur->cur_endrec);
 221                 tail = &cur->cur_tail;
 222                 break;
 223         }
 224
 225         case HSM_AGENT_REC: {
 226                 struct llog_agent_req_rec *arr =
 227                         (struct llog_agent_req_rec *)rec;
 228
 229                 __swab32s(&arr->arr_hai.hai_len);
 230                 __swab32s(&arr->arr_hai.hai_action);
 231                 lustre_swab_lu_fid(&arr->arr_hai.hai_fid);
 232                 lustre_swab_lu_fid(&arr->arr_hai.hai_dfid);
 233                 __swab64s(&arr->arr_hai.hai_cookie);
 234                 __swab64s(&arr->arr_hai.hai_extent.offset);
 235                 __swab64s(&arr->arr_hai.hai_extent.length);
 236                 __swab64s(&arr->arr_hai.hai_gid);
 237                 /* no swabing for opaque data */
 238                 /* hai_data[0]; */
 239                 break;
 240         }
 241
 242         case MDS_SETATTR64_REC:
 243         {
 244                 struct llog_setattr64_rec *lsr =
 245                         (struct llog_setattr64_rec *)rec;
 246
 247                 lustre_swab_ost_id(&lsr->lsr_oi);
 248                 __swab32s(&lsr->lsr_uid);
 249                 __swab32s(&lsr->lsr_uid_h);
 250                 __swab32s(&lsr->lsr_gid);
 251                 __swab32s(&lsr->lsr_gid_h);
 252                 __swab64s(&lsr->lsr_valid);
 253                 tail = &lsr->lsr_tail;
 254                 break;
 255         }
 256         case OBD_CFG_REC:
 257                 /* these are swabbed as they are consumed */
 258                 break;
 259         case LLOG_HDR_MAGIC:
 260         {
 261                 struct llog_log_hdr *llh = (struct llog_log_hdr *)rec;
 262
 263                 __swab64s(&llh->llh_timestamp);
 264                 __swab32s(&llh->llh_count);
 265                 __swab32s(&llh->llh_bitmap_offset);
 266                 __swab32s(&llh->llh_flags);
 267                 __swab32s(&llh->llh_size);
 268                 __swab32s(&llh->llh_cat_idx);
 269                 tail = &llh->llh_tail;
 270                 break;
 271         }
 272         case LLOG_LOGID_MAGIC:
 273         {
 274                 struct llog_logid_rec *lid = (struct llog_logid_rec *)rec;
 275
 276                 lustre_swab_llog_id(&lid->lid_id);
 277                 tail = &lid->lid_tail;
 278                 break;
 279         }
 280         case LLOG_GEN_REC:
 281         {
 282                 struct llog_gen_rec *lgr = (struct llog_gen_rec *)rec;
 283
 284                 __swab64s(&lgr->lgr_gen.mnt_cnt);
 285                 __swab64s(&lgr->lgr_gen.conn_cnt);
 286                 tail = &lgr->lgr_tail;
 287                 break;
 288         }
 289         case LLOG_PAD_MAGIC:
 290                 break;
 291         case UPDATE_REC:
 292         {
 293                 struct llog_update_record *lur =
 294                                 (struct llog_update_record *)rec;
 295                 struct update_records *record = &lur->lur_update_rec;
 296
 297                 __swab32s(&record->ur_flags);
 298                 __swab64s(&record->ur_batchid);
 299                 __swab64s(&record->ur_master_transno);
 300                 __swab32s(&record->ur_param_count);
 301                 __swab32s(&record->ur_update_count);
 302                 lustre_swab_update_ops(&record->ur_ops,
 303                                        record->ur_update_count);
 304
 305                 /* Compute tail location. */
 306                 tail = (struct llog_rec_tail *)((char *)record +
 307                                                 update_records_size(record));
 308                 break;
 309         }
 310         default:
 311                 CERROR("Unknown llog rec type %#x swabbing rec %p\n",
 312                        rec->lrh_type, rec);
 313         }
 314
 315         if (tail) {
 316                 __swab32s(&tail->lrt_len);
 317                 __swab32s(&tail->lrt_index);
 318         }
 319 }
 320
 321 static void print_llog_hdr(struct llog_log_hdr *h)
 322 {
 323         CDEBUG(D_OTHER, "llog header: %p\n", h);
 324         CDEBUG(D_OTHER, "\tllh_hdr.lrh_index: %#x\n", h->llh_hdr.lrh_index);
 325         CDEBUG(D_OTHER, "\tllh_hdr.lrh_len: %#x\n", h->llh_hdr.lrh_len);
 326         CDEBUG(D_OTHER, "\tllh_hdr.lrh_type: %#x\n", h->llh_hdr.lrh_type);
 327         CDEBUG(D_OTHER, "\tllh_timestamp: "LPX64"\n", h->llh_timestamp);
 328         CDEBUG(D_OTHER, "\tllh_count: %#x\n", h->llh_count);
 329         CDEBUG(D_OTHER, "\tllh_bitmap_offset: %#x\n", h->llh_bitmap_offset);
 330         CDEBUG(D_OTHER, "\tllh_flags: %#x\n", h->llh_flags);
 331         CDEBUG(D_OTHER, "\tllh_size: %#x\n", h->llh_size);
 332         CDEBUG(D_OTHER, "\tllh_cat_idx: %#x\n", h->llh_cat_idx);
 333         CDEBUG(D_OTHER, "\tllh_tail.lrt_index: %#x\n", h->llh_tail.lrt_index);
 334         CDEBUG(D_OTHER, "\tllh_tail.lrt_len: %#x\n", h->llh_tail.lrt_len);
 335 }
 336
 337 void lustre_swab_llog_hdr (struct llog_log_hdr *h)
 338 {
 339         ENTRY;
 340         print_llog_hdr(h);
 341
 342         lustre_swab_llog_rec(&h->llh_hdr);
 343
 344         print_llog_hdr(h);
 345         EXIT;
 346 }
 347 EXPORT_SYMBOL(lustre_swab_llog_hdr);
 348
 349 static void print_lustre_cfg(struct lustre_cfg *lcfg)
 350 {
 351         int i;
 352         ENTRY;
 353
 354         if (!(libcfs_debug & D_OTHER)) /* don't loop on nothing */
 355                 return;
 356         CDEBUG(D_OTHER, "lustre_cfg: %p\n", lcfg);
 357         CDEBUG(D_OTHER, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
 358
 359         CDEBUG(D_OTHER, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
 360         CDEBUG(D_OTHER, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
 361         CDEBUG(D_OTHER, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
 362         CDEBUG(D_OTHER, "\tlcfg->lcfg_nid: %s\n", libcfs_nid2str(lcfg->lcfg_nid));
 363
 364         CDEBUG(D_OTHER, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
 365         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
 366                 for (i = 0; i < lcfg->lcfg_bufcount; i++)
 367                         CDEBUG(D_OTHER, "\tlcfg->lcfg_buflens[%d]: %d\n",
 368                                i, lcfg->lcfg_buflens[i]);
 369         EXIT;
 370 }
 371
 372 void lustre_swab_lustre_cfg(struct lustre_cfg *lcfg)
 373 {
 374         int i;
 375         ENTRY;
 376
 377         __swab32s(&lcfg->lcfg_version);
 378
 379         if (lcfg->lcfg_version != LUSTRE_CFG_VERSION) {
 380                 CERROR("not swabbing lustre_cfg version %#x (expecting %#x)\n",
 381                        lcfg->lcfg_version, LUSTRE_CFG_VERSION);
 382                 EXIT;
 383                 return;
 384         }
 385
 386         __swab32s(&lcfg->lcfg_command);
 387         __swab32s(&lcfg->lcfg_num);
 388         __swab32s(&lcfg->lcfg_flags);
 389         __swab64s(&lcfg->lcfg_nid);
 390         __swab32s(&lcfg->lcfg_bufcount);
 391         for (i = 0; i < lcfg->lcfg_bufcount && i < LUSTRE_CFG_MAX_BUFCOUNT; i++)
 392                 __swab32s(&lcfg->lcfg_buflens[i]);
 393
 394         print_lustre_cfg(lcfg);
 395         EXIT;
 396         return;
 397 }
 398
 399 /* used only for compatibility with old on-disk cfg_marker data */
 400 struct cfg_marker32 {
 401         __u32   cm_step;
 402         __u32   cm_flags;
 403         __u32   cm_vers;
 404         __u32   padding;
 405         __u32   cm_createtime;
 406         __u32   cm_canceltime;
 407         char    cm_tgtname[MTI_NAME_MAXLEN];
 408         char    cm_comment[MTI_NAME_MAXLEN];
 409 };
 410
 411 #define MTI_NAMELEN32    (MTI_NAME_MAXLEN - \
 412         (sizeof(struct cfg_marker) - sizeof(struct cfg_marker32)))
 413
 414 void lustre_swab_cfg_marker(struct cfg_marker *marker, int swab, int size)
 415 {
 416         struct cfg_marker32 *cm32 = (struct cfg_marker32*)marker;
 417         ENTRY;
 418
 419         if (swab) {
 420                 __swab32s(&marker->cm_step);
 421                 __swab32s(&marker->cm_flags);
 422                 __swab32s(&marker->cm_vers);
 423         }
 424         if (size == sizeof(*cm32)) {
 425                 __u32 createtime, canceltime;
 426                 /* There was a problem with the original declaration of
 427                  * cfg_marker on 32-bit systems because it used time_t as
 428                  * a wire protocol structure, and didn't verify this in
 429                  * wirecheck.  We now have to convert the offsets of the
 430                  * later fields in order to work on 32- and 64-bit systems.
 431                  *
 432                  * Fortunately, the cm_comment field has no functional use
 433                  * so can be sacrificed when converting the timestamp size.
 434                  *
 435                  * Overwrite fields from the end first, so they are not
 436                  * clobbered, and use memmove() instead of memcpy() because
 437                  * the source and target buffers overlap.  bug 16771 */
 438                 createtime = cm32->cm_createtime;
 439                 canceltime = cm32->cm_canceltime;
 440                 memmove(marker->cm_comment, cm32->cm_comment, MTI_NAMELEN32);
 441                 marker->cm_comment[MTI_NAMELEN32 - 1] = '\0';
 442                 memmove(marker->cm_tgtname, cm32->cm_tgtname,
 443                         sizeof(marker->cm_tgtname));
 444                 if (swab) {
 445                         __swab32s(&createtime);
 446                         __swab32s(&canceltime);
 447                 }
 448                 marker->cm_createtime = createtime;
 449                 marker->cm_canceltime = canceltime;
 450                 CDEBUG(D_CONFIG, "Find old cfg_marker(Srv32b,Clt64b) "
 451                        "for target %s, converting\n",
 452                        marker->cm_tgtname);
 453         } else if (swab) {
 454                 __swab64s(&marker->cm_createtime);
 455                 __swab64s(&marker->cm_canceltime);
 456         }
 457
 458         EXIT;
 459         return;
 460 }