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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/llog_swab.c
  33  *
  34  * Swabbing of llog datatypes (from disk or over the wire).
  35  *
  36  * Author: jacob berkman  <jacob@clusterfs.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LOG
  40
  41
  42 #include <lustre_log.h>
  43 #include <lustre_update.h>
  44
  45 static void print_llogd_body(struct llogd_body *d)
  46 {
  47         CDEBUG(D_OTHER, "llogd body: %p\n", d);
  48         CDEBUG(D_OTHER, "\tlgd_logid.lgl_oi.oi_fid: "DFID"\n",
  49                PFID(&d->lgd_logid.lgl_oi.oi_fid));
  50         CDEBUG(D_OTHER, "\tlgd_logid.lgl_ogen: %#x\n", d->lgd_logid.lgl_ogen);
  51         CDEBUG(D_OTHER, "\tlgd_ctxt_idx: %#x\n", d->lgd_ctxt_idx);
  52         CDEBUG(D_OTHER, "\tlgd_llh_flags: %#x\n", d->lgd_llh_flags);
  53         CDEBUG(D_OTHER, "\tlgd_index: %#x\n", d->lgd_index);
  54         CDEBUG(D_OTHER, "\tlgd_saved_index: %#x\n", d->lgd_saved_index);
  55         CDEBUG(D_OTHER, "\tlgd_len: %#x\n", d->lgd_len);
  56         CDEBUG(D_OTHER, "\tlgd_cur_offset: %#llx\n", d->lgd_cur_offset);
  57 }
  58
  59 void lustre_swab_lu_fid(struct lu_fid *fid)
  60 {
  61         __swab64s (&fid->f_seq);
  62         __swab32s (&fid->f_oid);
  63         __swab32s (&fid->f_ver);
  64 }
  65 EXPORT_SYMBOL(lustre_swab_lu_fid);
  66
  67 void lustre_swab_ost_id(struct ost_id *oid)
  68 {
  69         if (fid_seq_is_mdt0(oid->oi.oi_seq) ||
  70             fid_seq_is_default(oid->oi.oi_seq)) {
  71                 __swab64s(&oid->oi.oi_id);
  72                 __swab64s(&oid->oi.oi_seq);
  73         } else {
  74                 lustre_swab_lu_fid(&oid->oi_fid);
  75         }
  76 }
  77 EXPORT_SYMBOL(lustre_swab_ost_id);
  78
  79 void lustre_swab_llog_id(struct llog_logid *log_id)
  80 {
  81         __swab64s(&log_id->lgl_oi.oi.oi_id);
  82         __swab64s(&log_id->lgl_oi.oi.oi_seq);
  83         __swab32s(&log_id->lgl_ogen);
  84 }
  85
  86 void lustre_swab_llogd_body (struct llogd_body *d)
  87 {
  88         ENTRY;
  89         print_llogd_body(d);
  90         lustre_swab_llog_id(&d->lgd_logid);
  91         __swab32s (&d->lgd_ctxt_idx);
  92         __swab32s (&d->lgd_llh_flags);
  93         __swab32s (&d->lgd_index);
  94         __swab32s (&d->lgd_saved_index);
  95         __swab32s (&d->lgd_len);
  96         __swab64s (&d->lgd_cur_offset);
  97         print_llogd_body(d);
  98         EXIT;
  99 }
 100 EXPORT_SYMBOL(lustre_swab_llogd_body);
 101
 102 void lustre_swab_llogd_conn_body (struct llogd_conn_body *d)
 103 {
 104         __swab64s (&d->lgdc_gen.mnt_cnt);
 105         __swab64s (&d->lgdc_gen.conn_cnt);
 106         lustre_swab_llog_id(&d->lgdc_logid);
 107         __swab32s (&d->lgdc_ctxt_idx);
 108 }
 109 EXPORT_SYMBOL(lustre_swab_llogd_conn_body);
 110
 111 void lustre_swab_ll_fid(struct ll_fid *fid)
 112 {
 113         __swab64s (&fid->id);
 114         __swab32s (&fid->generation);
 115         __swab32s (&fid->f_type);
 116 }
 117
 118 void lustre_swab_lu_seq_range(struct lu_seq_range *range)
 119 {
 120         __swab64s (&range->lsr_start);
 121         __swab64s (&range->lsr_end);
 122         __swab32s (&range->lsr_index);
 123         __swab32s (&range->lsr_flags);
 124 }
 125 EXPORT_SYMBOL(lustre_swab_lu_seq_range);
 126
 127 void lustre_swab_update_ops(struct update_ops *uops, unsigned int op_count)
 128 {
 129         unsigned int i;
 130         unsigned int j;
 131
 132         for (i = 0; i < op_count; i++) {
 133                 lustre_swab_lu_fid(&uops->uops_op[i].uop_fid);
 134                 __swab16s(&uops->uops_op[i].uop_type);
 135                 __swab16s(&uops->uops_op[i].uop_param_count);
 136                 for (j = 0; j < uops->uops_op[i].uop_param_count; j++)
 137                         __swab16s(&uops->uops_op[i].uop_params_off[j]);
 138         }
 139 }
 140 EXPORT_SYMBOL(lustre_swab_update_ops);
 141
 142 void lustre_swab_llog_rec(struct llog_rec_hdr *rec)
 143 {
 144         struct llog_rec_tail *tail = NULL;
 145
 146         __swab32s(&rec->lrh_len);
 147         __swab32s(&rec->lrh_index);
 148         __swab32s(&rec->lrh_type);
 149         __swab32s(&rec->lrh_id);
 150
 151         switch (rec->lrh_type) {
 152         case OST_SZ_REC:
 153         {
 154                 struct llog_size_change_rec *lsc =
 155                         (struct llog_size_change_rec *)rec;
 156
 157                 lustre_swab_ll_fid(&lsc->lsc_fid);
 158                 __swab32s(&lsc->lsc_ioepoch);
 159                 tail = &lsc->lsc_tail;
 160                 break;
 161         }
 162         case MDS_UNLINK_REC:
 163         {
 164                 struct llog_unlink_rec *lur = (struct llog_unlink_rec *)rec;
 165
 166                 __swab64s(&lur->lur_oid);
 167                 __swab32s(&lur->lur_oseq);
 168                 __swab32s(&lur->lur_count);
 169                 tail = &lur->lur_tail;
 170                 break;
 171         }
 172         case MDS_UNLINK64_REC:
 173         {
 174                 struct llog_unlink64_rec *lur =
 175                         (struct llog_unlink64_rec *)rec;
 176
 177                 lustre_swab_lu_fid(&lur->lur_fid);
 178                 __swab32s(&lur->lur_count);
 179                 tail = &lur->lur_tail;
 180                 break;
 181         }
 182         case CHANGELOG_REC:
 183         {
 184                 struct llog_changelog_rec *cr =
 185                         (struct llog_changelog_rec *)rec;
 186
 187                 __swab16s(&cr->cr.cr_namelen);
 188                 __swab16s(&cr->cr.cr_flags);
 189                 __swab32s(&cr->cr.cr_type);
 190                 __swab64s(&cr->cr.cr_index);
 191                 __swab64s(&cr->cr.cr_prev);
 192                 __swab64s(&cr->cr.cr_time);
 193                 lustre_swab_lu_fid(&cr->cr.cr_tfid);
 194                 lustre_swab_lu_fid(&cr->cr.cr_pfid);
 195                 if (cr->cr.cr_flags & CLF_RENAME) {
 196                         struct changelog_ext_rename *rnm =
 197                                 changelog_rec_rename(&cr->cr);
 198
 199                         lustre_swab_lu_fid(&rnm->cr_sfid);
 200                         lustre_swab_lu_fid(&rnm->cr_spfid);
 201                 }
 202                 /* Because the tail follows a variable-length structure we need
 203                  * to compute its location at runtime */
 204                 tail = (struct llog_rec_tail *)((char *)&cr->cr +
 205                                                 changelog_rec_size(&cr->cr) +
 206                                                 cr->cr.cr_namelen);
 207                 break;
 208         }
 209
 210         case CHANGELOG_USER_REC:
 211         {
 212                 struct llog_changelog_user_rec *cur =
 213                         (struct llog_changelog_user_rec*)rec;
 214
 215                 __swab32s(&cur->cur_id);
 216                 __swab64s(&cur->cur_endrec);
 217                 tail = &cur->cur_tail;
 218                 break;
 219         }
 220
 221         case HSM_AGENT_REC: {
 222                 struct llog_agent_req_rec *arr =
 223                         (struct llog_agent_req_rec *)rec;
 224
 225                 __swab32s(&arr->arr_hai.hai_len);
 226                 __swab32s(&arr->arr_hai.hai_action);
 227                 lustre_swab_lu_fid(&arr->arr_hai.hai_fid);
 228                 lustre_swab_lu_fid(&arr->arr_hai.hai_dfid);
 229                 __swab64s(&arr->arr_hai.hai_cookie);
 230                 __swab64s(&arr->arr_hai.hai_extent.offset);
 231                 __swab64s(&arr->arr_hai.hai_extent.length);
 232                 __swab64s(&arr->arr_hai.hai_gid);
 233                 /* no swabing for opaque data */
 234                 /* hai_data[0]; */
 235                 break;
 236         }
 237
 238         case MDS_SETATTR64_REC:
 239         {
 240                 struct llog_setattr64_rec *lsr =
 241                         (struct llog_setattr64_rec *)rec;
 242
 243                 lustre_swab_ost_id(&lsr->lsr_oi);
 244                 __swab32s(&lsr->lsr_uid);
 245                 __swab32s(&lsr->lsr_uid_h);
 246                 __swab32s(&lsr->lsr_gid);
 247                 __swab32s(&lsr->lsr_gid_h);
 248                 __swab64s(&lsr->lsr_valid);
 249
 250                 if (rec->lrh_len > sizeof(struct llog_setattr64_rec)) {
 251                         struct llog_setattr64_rec_v2 *lsr2 =
 252                                 (struct llog_setattr64_rec_v2 *)rec;
 253
 254                         __swab32s(&lsr2->lsr_projid);
 255                         __swab32s(&lsr2->lsr_layout_version);
 256                         tail = &lsr2->lsr_tail;
 257                 } else {
 258                         tail = &lsr->lsr_tail;
 259                 }
 260                 break;
 261         }
 262         case OBD_CFG_REC:
 263                 /* these are swabbed as they are consumed */
 264                 break;
 265         case LLOG_HDR_MAGIC:
 266         {
 267                 struct llog_log_hdr *llh = (struct llog_log_hdr *)rec;
 268
 269                 __swab64s(&llh->llh_timestamp);
 270                 __swab32s(&llh->llh_count);
 271                 __swab32s(&llh->llh_bitmap_offset);
 272                 __swab32s(&llh->llh_flags);
 273                 __swab32s(&llh->llh_size);
 274                 __swab32s(&llh->llh_cat_idx);
 275                 tail = LLOG_HDR_TAIL(llh);
 276                 break;
 277         }
 278         case LLOG_LOGID_MAGIC:
 279         {
 280                 struct llog_logid_rec *lid = (struct llog_logid_rec *)rec;
 281
 282                 lustre_swab_llog_id(&lid->lid_id);
 283                 tail = &lid->lid_tail;
 284                 break;
 285         }
 286         case LLOG_GEN_REC:
 287         {
 288                 struct llog_gen_rec *lgr = (struct llog_gen_rec *)rec;
 289
 290                 __swab64s(&lgr->lgr_gen.mnt_cnt);
 291                 __swab64s(&lgr->lgr_gen.conn_cnt);
 292                 tail = &lgr->lgr_tail;
 293                 break;
 294         }
 295         case LLOG_PAD_MAGIC:
 296                 break;
 297         case UPDATE_REC:
 298         {
 299                 struct llog_update_record *lur =
 300                                 (struct llog_update_record *)rec;
 301                 struct update_records *record = &lur->lur_update_rec;
 302
 303                 __swab32s(&record->ur_flags);
 304                 __swab64s(&record->ur_batchid);
 305                 __swab64s(&record->ur_master_transno);
 306                 __swab32s(&record->ur_param_count);
 307                 __swab32s(&record->ur_update_count);
 308                 lustre_swab_update_ops(&record->ur_ops,
 309                                        record->ur_update_count);
 310
 311                 /* Compute tail location. */
 312                 tail = (struct llog_rec_tail *)((char *)record +
 313                                                 update_records_size(record));
 314                 break;
 315         }
 316         default:
 317                 CERROR("Unknown llog rec type %#x swabbing rec %p\n",
 318                        rec->lrh_type, rec);
 319         }
 320
 321         if (tail) {
 322                 __swab32s(&tail->lrt_len);
 323                 __swab32s(&tail->lrt_index);
 324         }
 325 }
 326
 327 static void print_llog_hdr(struct llog_log_hdr *h)
 328 {
 329         CDEBUG(D_OTHER, "llog header: %p\n", h);
 330         CDEBUG(D_OTHER, "\tllh_hdr.lrh_index: %#x\n", h->llh_hdr.lrh_index);
 331         CDEBUG(D_OTHER, "\tllh_hdr.lrh_len: %#x\n", h->llh_hdr.lrh_len);
 332         CDEBUG(D_OTHER, "\tllh_hdr.lrh_type: %#x\n", h->llh_hdr.lrh_type);
 333         CDEBUG(D_OTHER, "\tllh_timestamp: %#llx\n", h->llh_timestamp);
 334         CDEBUG(D_OTHER, "\tllh_count: %#x\n", h->llh_count);
 335         CDEBUG(D_OTHER, "\tllh_bitmap_offset: %#x\n", h->llh_bitmap_offset);
 336         CDEBUG(D_OTHER, "\tllh_flags: %#x\n", h->llh_flags);
 337         CDEBUG(D_OTHER, "\tllh_size: %#x\n", h->llh_size);
 338         CDEBUG(D_OTHER, "\tllh_cat_idx: %#x\n", h->llh_cat_idx);
 339         CDEBUG(D_OTHER, "\tllh_tail.lrt_index: %#x\n",
 340                LLOG_HDR_TAIL(h)->lrt_index);
 341         CDEBUG(D_OTHER, "\tllh_tail.lrt_len: %#x\n",
 342                LLOG_HDR_TAIL(h)->lrt_len);
 343 }
 344
 345 void lustre_swab_llog_hdr (struct llog_log_hdr *h)
 346 {
 347         ENTRY;
 348         print_llog_hdr(h);
 349
 350         lustre_swab_llog_rec(&h->llh_hdr);
 351
 352         print_llog_hdr(h);
 353         EXIT;
 354 }
 355 EXPORT_SYMBOL(lustre_swab_llog_hdr);
 356
 357 static void print_lustre_cfg(struct lustre_cfg *lcfg)
 358 {
 359         int i;
 360         ENTRY;
 361
 362         if (!(libcfs_debug & D_OTHER)) /* don't loop on nothing */
 363                 return;
 364         CDEBUG(D_OTHER, "lustre_cfg: %p\n", lcfg);
 365         CDEBUG(D_OTHER, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
 366
 367         CDEBUG(D_OTHER, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
 368         CDEBUG(D_OTHER, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
 369         CDEBUG(D_OTHER, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
 370         CDEBUG(D_OTHER, "\tlcfg->lcfg_nid: %s\n", libcfs_nid2str(lcfg->lcfg_nid));
 371
 372         CDEBUG(D_OTHER, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
 373         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
 374                 for (i = 0; i < lcfg->lcfg_bufcount; i++)
 375                         CDEBUG(D_OTHER, "\tlcfg->lcfg_buflens[%d]: %d\n",
 376                                i, lcfg->lcfg_buflens[i]);
 377         EXIT;
 378 }
 379
 380 void lustre_swab_lustre_cfg(struct lustre_cfg *lcfg)
 381 {
 382         int i;
 383         ENTRY;
 384
 385         __swab32s(&lcfg->lcfg_version);
 386
 387         if (lcfg->lcfg_version != LUSTRE_CFG_VERSION) {
 388                 CERROR("not swabbing lustre_cfg version %#x (expecting %#x)\n",
 389                        lcfg->lcfg_version, LUSTRE_CFG_VERSION);
 390                 EXIT;
 391                 return;
 392         }
 393
 394         __swab32s(&lcfg->lcfg_command);
 395         __swab32s(&lcfg->lcfg_num);
 396         __swab32s(&lcfg->lcfg_flags);
 397         __swab64s(&lcfg->lcfg_nid);
 398         __swab32s(&lcfg->lcfg_bufcount);
 399         for (i = 0; i < lcfg->lcfg_bufcount && i < LUSTRE_CFG_MAX_BUFCOUNT; i++)
 400                 __swab32s(&lcfg->lcfg_buflens[i]);
 401
 402         print_lustre_cfg(lcfg);
 403         EXIT;
 404         return;
 405 }
 406
 407 /* used only for compatibility with old on-disk cfg_marker data */
 408 struct cfg_marker32 {
 409         __u32   cm_step;
 410         __u32   cm_flags;
 411         __u32   cm_vers;
 412         __u32   padding;
 413         __u32   cm_createtime;
 414         __u32   cm_canceltime;
 415         char    cm_tgtname[MTI_NAME_MAXLEN];
 416         char    cm_comment[MTI_NAME_MAXLEN];
 417 };
 418
 419 #define MTI_NAMELEN32    (MTI_NAME_MAXLEN - \
 420         (sizeof(struct cfg_marker) - sizeof(struct cfg_marker32)))
 421
 422 void lustre_swab_cfg_marker(struct cfg_marker *marker, int swab, int size)
 423 {
 424         struct cfg_marker32 *cm32 = (struct cfg_marker32*)marker;
 425         ENTRY;
 426
 427         if (swab) {
 428                 __swab32s(&marker->cm_step);
 429                 __swab32s(&marker->cm_flags);
 430                 __swab32s(&marker->cm_vers);
 431         }
 432         if (size == sizeof(*cm32)) {
 433                 __u32 createtime, canceltime;
 434                 /* There was a problem with the original declaration of
 435                  * cfg_marker on 32-bit systems because it used time_t as
 436                  * a wire protocol structure, and didn't verify this in
 437                  * wirecheck.  We now have to convert the offsets of the
 438                  * later fields in order to work on 32- and 64-bit systems.
 439                  *
 440                  * Fortunately, the cm_comment field has no functional use
 441                  * so can be sacrificed when converting the timestamp size.
 442                  *
 443                  * Overwrite fields from the end first, so they are not
 444                  * clobbered, and use memmove() instead of memcpy() because
 445                  * the source and target buffers overlap.  bug 16771 */
 446                 createtime = cm32->cm_createtime;
 447                 canceltime = cm32->cm_canceltime;
 448                 memmove(marker->cm_comment, cm32->cm_comment, MTI_NAMELEN32);
 449                 marker->cm_comment[MTI_NAMELEN32 - 1] = '\0';
 450                 memmove(marker->cm_tgtname, cm32->cm_tgtname,
 451                         sizeof(marker->cm_tgtname));
 452                 if (swab) {
 453                         __swab32s(&createtime);
 454                         __swab32s(&canceltime);
 455                 }
 456                 marker->cm_createtime = createtime;
 457                 marker->cm_canceltime = canceltime;
 458                 CDEBUG(D_CONFIG, "Find old cfg_marker(Srv32b,Clt64b) "
 459                        "for target %s, converting\n",
 460                        marker->cm_tgtname);
 461         } else if (swab) {
 462                 __swab64s(&marker->cm_createtime);
 463                 __swab64s(&marker->cm_canceltime);
 464         }
 465
 466         EXIT;
 467         return;
 468 }