lustre/ptlrpc/pack_generic.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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/ptlrpc/pack_generic.c
  32  *
  33  * (Un)packing of OST requests
  34  *
  35  * Author: Peter J. Braam <braam@clusterfs.com>
  36  * Author: Phil Schwan <phil@clusterfs.com>
  37  * Author: Eric Barton <eeb@clusterfs.com>
  38  */
  39
  40 #define DEBUG_SUBSYSTEM S_RPC
  41
  42 #include <linux/crc32.h>
  43
  44 #include <libcfs/libcfs.h>
  45
  46 #include <llog_swab.h>
  47 #include <lustre_disk.h>
  48 #include <lustre_net.h>
  49 #include <lustre_swab.h>
  50 #include <obd_cksum.h>
  51 #include <obd_class.h>
  52 #include <obd_support.h>
  53 #include "ptlrpc_internal.h"
  54
  55 static inline __u32 lustre_msg_hdr_size_v2(__u32 count)
  56 {
  57         return round_up(offsetof(struct lustre_msg_v2, lm_buflens[count]), 8);
  58 }
  59
  60 __u32 lustre_msg_hdr_size(__u32 magic, __u32 count)
  61 {
  62         LASSERT(count > 0);
  63
  64         switch (magic) {
  65         case LUSTRE_MSG_MAGIC_V2:
  66                 return lustre_msg_hdr_size_v2(count);
  67         default:
  68                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
  69                 return 0;
  70         }
  71 }
  72
  73 static inline int lustre_msg_check_version_v2(struct lustre_msg_v2 *msg,
  74                                               enum lustre_msg_version version)
  75 {
  76         enum lustre_msg_version ver = lustre_msg_get_version(msg);
  77
  78         return (ver & LUSTRE_VERSION_MASK) != version;
  79 }
  80
  81 int lustre_msg_check_version(struct lustre_msg *msg,
  82                              enum lustre_msg_version version)
  83 {
  84 #define LUSTRE_MSG_MAGIC_V1 0x0BD00BD0
  85         switch (msg->lm_magic) {
  86         case LUSTRE_MSG_MAGIC_V1:
  87                 CERROR("msg v1 not supported - please upgrade you system\n");
  88                 return -EINVAL;
  89         case LUSTRE_MSG_MAGIC_V2:
  90                 return lustre_msg_check_version_v2(msg, version);
  91         default:
  92                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
  93                 return -EPROTO;
  94         }
  95 #undef LUSTRE_MSG_MAGIC_V1
  96 }
  97
  98 __u32 lustre_msg_early_size;
  99 EXPORT_SYMBOL(lustre_msg_early_size);
 100
 101 /* early reply size */
 102 void lustre_msg_early_size_init(void)
 103 {
 104         __u32 pblen = sizeof(struct ptlrpc_body);
 105
 106         lustre_msg_early_size = lustre_msg_size(LUSTRE_MSG_MAGIC_V2, 1, &pblen);
 107 }
 108
 109 __u32 lustre_msg_size_v2(int count, __u32 *lengths)
 110 {
 111         __u32 size;
 112         int i;
 113
 114         LASSERT(count > 0);
 115         size = lustre_msg_hdr_size_v2(count);
 116         for (i = 0; i < count; i++)
 117                 size += round_up(lengths[i], 8);
 118
 119         return size;
 120 }
 121 EXPORT_SYMBOL(lustre_msg_size_v2);
 122
 123 /*
 124  * This returns the size of the buffer that is required to hold a lustre_msg
 125  * with the given sub-buffer lengths.
 126  * NOTE: this should only be used for NEW requests, and should always be
 127  *       in the form of a v2 request.  If this is a connection to a v1
 128  *       target then the first buffer will be stripped because the ptlrpc
 129  *       data is part of the lustre_msg_v1 header. b=14043
 130  */
 131 __u32 lustre_msg_size(__u32 magic, int count, __u32 *lens)
 132 {
 133         __u32 size[] = { sizeof(struct ptlrpc_body) };
 134
 135         if (!lens) {
 136                 LASSERT(count == 1);
 137                 lens = size;
 138         }
 139
 140         LASSERT(count > 0);
 141         LASSERT(lens[MSG_PTLRPC_BODY_OFF] >= sizeof(struct ptlrpc_body_v2));
 142
 143         switch (magic) {
 144         case LUSTRE_MSG_MAGIC_V2:
 145                 return lustre_msg_size_v2(count, lens);
 146         default:
 147                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
 148                 return 0;
 149         }
 150 }
 151
 152 /*
 153  * This is used to determine the size of a buffer that was already packed
 154  * and will correctly handle the different message formats.
 155  */
 156 __u32 lustre_packed_msg_size(struct lustre_msg *msg)
 157 {
 158         switch (msg->lm_magic) {
 159         case LUSTRE_MSG_MAGIC_V2:
 160                 return lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
 161         default:
 162                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 163                 return 0;
 164         }
 165 }
 166 EXPORT_SYMBOL(lustre_packed_msg_size);
 167
 168 void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
 169                         char **bufs)
 170 {
 171         char *ptr;
 172         int i;
 173
 174         LASSERT(count > 0);
 175
 176         msg->lm_bufcount = count;
 177         /* XXX: lm_secflvr uninitialized here */
 178         msg->lm_magic = LUSTRE_MSG_MAGIC_V2;
 179
 180         for (i = 0; i < count; i++)
 181                 msg->lm_buflens[i] = lens[i];
 182
 183         if (bufs == NULL)
 184                 return;
 185
 186         ptr = (char *)msg + lustre_msg_hdr_size_v2(count);
 187         for (i = 0; i < count; i++) {
 188                 char *tmp = bufs[i];
 189
 190                 if (tmp)
 191                         memcpy(ptr, tmp, lens[i]);
 192                 ptr += round_up(lens[i], 8);
 193         }
 194 }
 195 EXPORT_SYMBOL(lustre_init_msg_v2);
 196
 197 static int lustre_pack_request_v2(struct ptlrpc_request *req,
 198                                   int count, __u32 *lens, char **bufs)
 199 {
 200         int reqlen, rc;
 201
 202         reqlen = lustre_msg_size_v2(count, lens);
 203
 204         rc = sptlrpc_cli_alloc_reqbuf(req, reqlen);
 205         if (rc)
 206                 return rc;
 207
 208         req->rq_reqlen = reqlen;
 209
 210         lustre_init_msg_v2(req->rq_reqmsg, count, lens, bufs);
 211         lustre_msg_add_version(req->rq_reqmsg, PTLRPC_MSG_VERSION);
 212         return 0;
 213 }
 214
 215 int lustre_pack_request(struct ptlrpc_request *req, __u32 magic, int count,
 216                         __u32 *lens, char **bufs)
 217 {
 218         __u32 size[] = { sizeof(struct ptlrpc_body) };
 219
 220         if (!lens) {
 221                 LASSERT(count == 1);
 222                 lens = size;
 223         }
 224
 225         LASSERT(count > 0);
 226         LASSERT(lens[MSG_PTLRPC_BODY_OFF] == sizeof(struct ptlrpc_body));
 227
 228         /* only use new format, we don't need to be compatible with 1.4 */
 229         magic = LUSTRE_MSG_MAGIC_V2;
 230
 231         switch (magic) {
 232         case LUSTRE_MSG_MAGIC_V2:
 233                 return lustre_pack_request_v2(req, count, lens, bufs);
 234         default:
 235                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
 236                 return -EINVAL;
 237         }
 238 }
 239
 240 #if RS_DEBUG
 241 struct list_head ptlrpc_rs_debug_lru =
 242         LIST_HEAD_INIT(ptlrpc_rs_debug_lru);
 243 spinlock_t ptlrpc_rs_debug_lock;
 244
 245 #define PTLRPC_RS_DEBUG_LRU_ADD(rs)                                     \
 246 do {                                                                    \
 247         spin_lock(&ptlrpc_rs_debug_lock);                               \
 248         list_add_tail(&(rs)->rs_debug_list, &ptlrpc_rs_debug_lru);      \
 249         spin_unlock(&ptlrpc_rs_debug_lock);                             \
 250 } while (0)
 251
 252 #define PTLRPC_RS_DEBUG_LRU_DEL(rs)                                     \
 253 do {                                                                    \
 254         spin_lock(&ptlrpc_rs_debug_lock);                               \
 255         list_del(&(rs)->rs_debug_list);                         \
 256         spin_unlock(&ptlrpc_rs_debug_lock);                             \
 257 } while (0)
 258 #else
 259 # define PTLRPC_RS_DEBUG_LRU_ADD(rs) do {} while(0)
 260 # define PTLRPC_RS_DEBUG_LRU_DEL(rs) do {} while(0)
 261 #endif
 262
 263 struct ptlrpc_reply_state *
 264 lustre_get_emerg_rs(struct ptlrpc_service_part *svcpt)
 265 {
 266         struct ptlrpc_reply_state *rs = NULL;
 267
 268         spin_lock(&svcpt->scp_rep_lock);
 269
 270         /* See if we have anything in a pool, and wait if nothing */
 271         while (list_empty(&svcpt->scp_rep_idle)) {
 272                 int                     rc;
 273
 274                 spin_unlock(&svcpt->scp_rep_lock);
 275                 /* If we cannot get anything for some long time, we better
 276                  * bail out instead of waiting infinitely */
 277                 rc = wait_event_idle_timeout(svcpt->scp_rep_waitq,
 278                                              !list_empty(&svcpt->scp_rep_idle),
 279                                              cfs_time_seconds(10));
 280                 if (rc <= 0)
 281                         goto out;
 282                 spin_lock(&svcpt->scp_rep_lock);
 283         }
 284
 285         rs = list_first_entry(&svcpt->scp_rep_idle,
 286                               struct ptlrpc_reply_state, rs_list);
 287         list_del(&rs->rs_list);
 288
 289         spin_unlock(&svcpt->scp_rep_lock);
 290
 291         memset(rs, 0, svcpt->scp_service->srv_max_reply_size);
 292         rs->rs_size = svcpt->scp_service->srv_max_reply_size;
 293         rs->rs_svcpt = svcpt;
 294         rs->rs_prealloc = 1;
 295 out:
 296         return rs;
 297 }
 298
 299 void lustre_put_emerg_rs(struct ptlrpc_reply_state *rs)
 300 {
 301         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 302
 303         spin_lock(&svcpt->scp_rep_lock);
 304         list_add(&rs->rs_list, &svcpt->scp_rep_idle);
 305         spin_unlock(&svcpt->scp_rep_lock);
 306         wake_up(&svcpt->scp_rep_waitq);
 307 }
 308
 309 int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
 310                          __u32 *lens, char **bufs, int flags)
 311 {
 312         struct ptlrpc_reply_state *rs;
 313         int msg_len, rc;
 314         ENTRY;
 315
 316         LASSERT(req->rq_reply_state == NULL);
 317         LASSERT(count > 0);
 318
 319         if ((flags & LPRFL_EARLY_REPLY) == 0) {
 320                 spin_lock(&req->rq_lock);
 321                 req->rq_packed_final = 1;
 322                 spin_unlock(&req->rq_lock);
 323         }
 324
 325         msg_len = lustre_msg_size_v2(count, lens);
 326         rc = sptlrpc_svc_alloc_rs(req, msg_len);
 327         if (rc)
 328                 RETURN(rc);
 329
 330         rs = req->rq_reply_state;
 331         atomic_set(&rs->rs_refcount, 1); /* 1 ref for rq_reply_state */
 332         rs->rs_cb_id.cbid_fn = reply_out_callback;
 333         rs->rs_cb_id.cbid_arg = rs;
 334         rs->rs_svcpt = req->rq_rqbd->rqbd_svcpt;
 335         INIT_LIST_HEAD(&rs->rs_exp_list);
 336         INIT_LIST_HEAD(&rs->rs_obd_list);
 337         INIT_LIST_HEAD(&rs->rs_list);
 338         spin_lock_init(&rs->rs_lock);
 339
 340         req->rq_replen = msg_len;
 341         req->rq_reply_state = rs;
 342         req->rq_repmsg = rs->rs_msg;
 343
 344         lustre_init_msg_v2(rs->rs_msg, count, lens, bufs);
 345         lustre_msg_add_version(rs->rs_msg, PTLRPC_MSG_VERSION);
 346
 347         PTLRPC_RS_DEBUG_LRU_ADD(rs);
 348
 349         RETURN(0);
 350 }
 351 EXPORT_SYMBOL(lustre_pack_reply_v2);
 352
 353 int lustre_pack_reply_flags(struct ptlrpc_request *req, int count, __u32 *lens,
 354                             char **bufs, int flags)
 355 {
 356         int rc = 0;
 357         __u32 size[] = { sizeof(struct ptlrpc_body) };
 358
 359         if (!lens) {
 360                 LASSERT(count == 1);
 361                 lens = size;
 362         }
 363
 364         LASSERT(count > 0);
 365         LASSERT(lens[MSG_PTLRPC_BODY_OFF] == sizeof(struct ptlrpc_body));
 366
 367         switch (req->rq_reqmsg->lm_magic) {
 368         case LUSTRE_MSG_MAGIC_V2:
 369                 rc = lustre_pack_reply_v2(req, count, lens, bufs, flags);
 370                 break;
 371         default:
 372                 LASSERTF(0, "incorrect message magic: %08x\n",
 373                          req->rq_reqmsg->lm_magic);
 374                 rc = -EINVAL;
 375         }
 376         if (rc != 0)
 377                 CERROR("lustre_pack_reply failed: rc=%d size=%d\n", rc,
 378                        lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens));
 379         return rc;
 380 }
 381
 382 int lustre_pack_reply(struct ptlrpc_request *req, int count, __u32 *lens,
 383                       char **bufs)
 384 {
 385         return lustre_pack_reply_flags(req, count, lens, bufs, 0);
 386 }
 387 EXPORT_SYMBOL(lustre_pack_reply);
 388
 389 void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, __u32 n, __u32 min_size)
 390 {
 391         __u32 i, offset, buflen, bufcount;
 392
 393         LASSERT(m != NULL);
 394         LASSERT(m->lm_bufcount > 0);
 395
 396         bufcount = m->lm_bufcount;
 397         if (unlikely(n >= bufcount)) {
 398                 CDEBUG(D_INFO, "msg %p buffer[%d] not present (count %d)\n",
 399                        m, n, bufcount);
 400                 return NULL;
 401         }
 402
 403         buflen = m->lm_buflens[n];
 404         if (unlikely(buflen < min_size)) {
 405                 CERROR("msg %p buffer[%d] size %d too small "
 406                        "(required %d, opc=%d)\n", m, n, buflen, min_size,
 407                        n == MSG_PTLRPC_BODY_OFF ? -1 : lustre_msg_get_opc(m));
 408                 return NULL;
 409         }
 410
 411         offset = lustre_msg_hdr_size_v2(bufcount);
 412         for (i = 0; i < n; i++)
 413                 offset += round_up(m->lm_buflens[i], 8);
 414
 415         return (char *)m + offset;
 416 }
 417
 418 void *lustre_msg_buf(struct lustre_msg *m, __u32 n, __u32 min_size)
 419 {
 420         switch (m->lm_magic) {
 421         case LUSTRE_MSG_MAGIC_V2:
 422                 return lustre_msg_buf_v2(m, n, min_size);
 423         default:
 424                 LASSERTF(0, "incorrect message magic: %08x (msg:%p)\n",
 425                          m->lm_magic, m);
 426                 return NULL;
 427         }
 428 }
 429 EXPORT_SYMBOL(lustre_msg_buf);
 430
 431 static int lustre_shrink_msg_v2(struct lustre_msg_v2 *msg, __u32 segment,
 432                                 unsigned int newlen, int move_data)
 433 {
 434         char *tail = NULL, *newpos;
 435         int tail_len = 0, n;
 436
 437         LASSERT(msg);
 438         LASSERT(msg->lm_bufcount > segment);
 439         LASSERT(msg->lm_buflens[segment] >= newlen);
 440
 441         if (msg->lm_buflens[segment] == newlen)
 442                 goto out;
 443
 444         if (move_data && msg->lm_bufcount > segment + 1) {
 445                 tail = lustre_msg_buf_v2(msg, segment + 1, 0);
 446                 for (n = segment + 1; n < msg->lm_bufcount; n++)
 447                         tail_len += round_up(msg->lm_buflens[n], 8);
 448         }
 449
 450         msg->lm_buflens[segment] = newlen;
 451
 452         if (tail && tail_len) {
 453                 newpos = lustre_msg_buf_v2(msg, segment + 1, 0);
 454                 LASSERT(newpos <= tail);
 455                 if (newpos != tail)
 456                         memmove(newpos, tail, tail_len);
 457         }
 458 out:
 459         return lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
 460 }
 461
 462 /*
 463  * for @msg, shrink @segment to size @newlen. if @move_data is non-zero,
 464  * we also move data forward from @segment + 1.
 465  *
 466  * if @newlen == 0, we remove the segment completely, but we still keep the
 467  * totally bufcount the same to save possible data moving. this will leave a
 468  * unused segment with size 0 at the tail, but that's ok.
 469  *
 470  * return new msg size after shrinking.
 471  *
 472  * CAUTION:
 473  * + if any buffers higher than @segment has been filled in, must call shrink
 474  *   with non-zero @move_data.
 475  * + caller should NOT keep pointers to msg buffers which higher than @segment
 476  *   after call shrink.
 477  */
 478 int lustre_shrink_msg(struct lustre_msg *msg, int segment,
 479                       unsigned int newlen, int move_data)
 480 {
 481         switch (msg->lm_magic) {
 482         case LUSTRE_MSG_MAGIC_V2:
 483                 return lustre_shrink_msg_v2(msg, segment, newlen, move_data);
 484         default:
 485                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 486         }
 487 }
 488 EXPORT_SYMBOL(lustre_shrink_msg);
 489
 490 static int lustre_grow_msg_v2(struct lustre_msg_v2 *msg, __u32 segment,
 491                               unsigned int newlen)
 492 {
 493         char *tail = NULL, *newpos;
 494         int tail_len = 0, n;
 495
 496         LASSERT(msg);
 497         LASSERT(msg->lm_bufcount > segment);
 498         LASSERT(msg->lm_buflens[segment] <= newlen);
 499
 500         if (msg->lm_buflens[segment] == newlen)
 501                 goto out;
 502
 503         if (msg->lm_bufcount > segment + 1) {
 504                 tail = lustre_msg_buf_v2(msg, segment + 1, 0);
 505                 for (n = segment + 1; n < msg->lm_bufcount; n++)
 506                         tail_len += round_up(msg->lm_buflens[n], 8);
 507         }
 508
 509         msg->lm_buflens[segment] = newlen;
 510
 511         if (tail && tail_len) {
 512                 newpos = lustre_msg_buf_v2(msg, segment + 1, 0);
 513                 memmove(newpos, tail, tail_len);
 514         }
 515 out:
 516         return lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
 517 }
 518
 519 /*
 520  * for @msg, grow @segment to size @newlen.
 521  * Always move higher buffer forward.
 522  *
 523  * return new msg size after growing.
 524  *
 525  * CAUTION:
 526  * - caller must make sure there is enough space in allocated message buffer
 527  * - caller should NOT keep pointers to msg buffers which higher than @segment
 528  *   after call shrink.
 529  */
 530 int lustre_grow_msg(struct lustre_msg *msg, int segment, unsigned int newlen)
 531 {
 532         switch (msg->lm_magic) {
 533         case LUSTRE_MSG_MAGIC_V2:
 534                 return lustre_grow_msg_v2(msg, segment, newlen);
 535         default:
 536                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 537         }
 538 }
 539 EXPORT_SYMBOL(lustre_grow_msg);
 540
 541 void lustre_free_reply_state(struct ptlrpc_reply_state *rs)
 542 {
 543         PTLRPC_RS_DEBUG_LRU_DEL(rs);
 544
 545         LASSERT(atomic_read(&rs->rs_refcount) == 0);
 546         LASSERT(!rs->rs_difficult || rs->rs_handled);
 547         LASSERT(!rs->rs_difficult || rs->rs_unlinked);
 548         LASSERT(!rs->rs_scheduled);
 549         LASSERT(rs->rs_export == NULL);
 550         LASSERT(rs->rs_nlocks == 0);
 551         LASSERT(list_empty(&rs->rs_exp_list));
 552         LASSERT(list_empty(&rs->rs_obd_list));
 553
 554         sptlrpc_svc_free_rs(rs);
 555 }
 556
 557 static int lustre_unpack_msg_v2(struct lustre_msg_v2 *m, int len)
 558 {
 559         int swabbed, required_len, i, buflen;
 560
 561         /* Now we know the sender speaks my language. */
 562         required_len = lustre_msg_hdr_size_v2(0);
 563         if (len < required_len) {
 564                 /* can't even look inside the message */
 565                 CERROR("message length %d too small for lustre_msg\n", len);
 566                 return -EINVAL;
 567         }
 568
 569         swabbed = (m->lm_magic == LUSTRE_MSG_MAGIC_V2_SWABBED);
 570
 571         if (swabbed) {
 572                 __swab32s(&m->lm_magic);
 573                 __swab32s(&m->lm_bufcount);
 574                 __swab32s(&m->lm_secflvr);
 575                 __swab32s(&m->lm_repsize);
 576                 __swab32s(&m->lm_cksum);
 577                 __swab32s(&m->lm_flags);
 578                 __swab32s(&m->lm_opc);
 579                 BUILD_BUG_ON(offsetof(typeof(*m), lm_padding_3) == 0);
 580         }
 581
 582         if (m->lm_bufcount == 0 || m->lm_bufcount > PTLRPC_MAX_BUFCOUNT) {
 583                 CERROR("message bufcount %d is not valid\n", m->lm_bufcount);
 584                 return -EINVAL;
 585         }
 586         required_len = lustre_msg_hdr_size_v2(m->lm_bufcount);
 587         if (len < required_len) {
 588                 /* didn't receive all the buffer lengths */
 589                 CERROR("message length %d too small for %d buflens\n",
 590                        len, m->lm_bufcount);
 591                 return -EINVAL;
 592         }
 593
 594         for (i = 0; i < m->lm_bufcount; i++) {
 595                 if (swabbed)
 596                         __swab32s(&m->lm_buflens[i]);
 597                 buflen = round_up(m->lm_buflens[i], 8);
 598                 if (buflen < 0 || buflen > PTLRPC_MAX_BUFLEN) {
 599                         CERROR("buffer %d length %d is not valid\n", i, buflen);
 600                         return -EINVAL;
 601                 }
 602                 required_len += buflen;
 603         }
 604         if (len < required_len || required_len > PTLRPC_MAX_BUFLEN) {
 605                 CERROR("len: %d, required_len %d, bufcount: %d\n",
 606                        len, required_len, m->lm_bufcount);
 607                 for (i = 0; i < m->lm_bufcount; i++)
 608                         CERROR("buffer %d length %d\n", i, m->lm_buflens[i]);
 609                 return -EINVAL;
 610         }
 611
 612         return swabbed;
 613 }
 614
 615 int __lustre_unpack_msg(struct lustre_msg *m, int len)
 616 {
 617         int required_len, rc;
 618
 619         ENTRY;
 620         /*
 621          * We can provide a slightly better error log, if we check the
 622          * message magic and version first.  In the future, struct
 623          * lustre_msg may grow, and we'd like to log a version mismatch,
 624          * rather than a short message.
 625          */
 626         required_len = offsetof(struct lustre_msg, lm_magic) +
 627                                 sizeof(m->lm_magic);
 628         if (len < required_len) {
 629                 /* can't even look inside the message */
 630                 CERROR("message length %d too small for magic/version check\n",
 631                        len);
 632                 RETURN(-EINVAL);
 633         }
 634
 635         rc = lustre_unpack_msg_v2(m, len);
 636
 637         RETURN(rc);
 638 }
 639 EXPORT_SYMBOL(__lustre_unpack_msg);
 640
 641 int ptlrpc_unpack_req_msg(struct ptlrpc_request *req, int len)
 642 {
 643         int rc;
 644
 645         rc = __lustre_unpack_msg(req->rq_reqmsg, len);
 646         if (rc == 1) {
 647                 req_capsule_set_req_swabbed(&req->rq_pill,
 648                                             MSG_PTLRPC_HEADER_OFF);
 649                 rc = 0;
 650         }
 651         return rc;
 652 }
 653
 654 int ptlrpc_unpack_rep_msg(struct ptlrpc_request *req, int len)
 655 {
 656         int rc;
 657
 658         rc = __lustre_unpack_msg(req->rq_repmsg, len);
 659         if (rc == 1) {
 660                 req_capsule_set_rep_swabbed(&req->rq_pill,
 661                                             MSG_PTLRPC_HEADER_OFF);
 662                 rc = 0;
 663         }
 664         return rc;
 665 }
 666
 667 static inline int
 668 lustre_unpack_ptlrpc_body_v2(struct ptlrpc_request *req,
 669                              enum req_location loc, int offset)
 670 {
 671         struct ptlrpc_body *pb;
 672         struct lustre_msg_v2 *m;
 673
 674         m = loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
 675
 676         pb = lustre_msg_buf_v2(m, offset, sizeof(struct ptlrpc_body_v2));
 677         if (!pb) {
 678                 CERROR("error unpacking ptlrpc body\n");
 679                 return -EFAULT;
 680         }
 681         if (req_capsule_need_swab(&req->rq_pill, loc, offset)) {
 682                 lustre_swab_ptlrpc_body(pb);
 683                 req_capsule_set_swabbed(&req->rq_pill, loc, offset);
 684         }
 685
 686         if ((pb->pb_version & ~LUSTRE_VERSION_MASK) != PTLRPC_MSG_VERSION) {
 687                 CERROR("wrong lustre_msg version %08x\n", pb->pb_version);
 688                 return -EINVAL;
 689         }
 690
 691         if (loc == RCL_SERVER)
 692                 pb->pb_status = ptlrpc_status_ntoh(pb->pb_status);
 693
 694         return 0;
 695 }
 696
 697 int lustre_unpack_req_ptlrpc_body(struct ptlrpc_request *req, int offset)
 698 {
 699         switch (req->rq_reqmsg->lm_magic) {
 700         case LUSTRE_MSG_MAGIC_V2:
 701                 return lustre_unpack_ptlrpc_body_v2(req, RCL_CLIENT, offset);
 702         default:
 703                 CERROR("bad lustre msg magic: %08x\n",
 704                        req->rq_reqmsg->lm_magic);
 705                 return -EINVAL;
 706         }
 707 }
 708
 709 int lustre_unpack_rep_ptlrpc_body(struct ptlrpc_request *req, int offset)
 710 {
 711         switch (req->rq_repmsg->lm_magic) {
 712         case LUSTRE_MSG_MAGIC_V2:
 713                 return lustre_unpack_ptlrpc_body_v2(req, RCL_SERVER, offset);
 714         default:
 715                 CERROR("bad lustre msg magic: %08x\n",
 716                        req->rq_repmsg->lm_magic);
 717                 return -EINVAL;
 718         }
 719 }
 720
 721 static inline __u32 lustre_msg_buflen_v2(struct lustre_msg_v2 *m, __u32 n)
 722 {
 723         if (n >= m->lm_bufcount)
 724                 return 0;
 725
 726         return m->lm_buflens[n];
 727 }
 728
 729 /**
 730  * lustre_msg_buflen - return the length of buffer \a n in message \a m
 731  * \param m lustre_msg (request or reply) to look at
 732  * \param n message index (base 0)
 733  *
 734  * returns zero for non-existent message indices
 735  */
 736 __u32 lustre_msg_buflen(struct lustre_msg *m, __u32 n)
 737 {
 738         switch (m->lm_magic) {
 739         case LUSTRE_MSG_MAGIC_V2:
 740                 return lustre_msg_buflen_v2(m, n);
 741         default:
 742                 CERROR("incorrect message magic: %08x\n", m->lm_magic);
 743                 return 0;
 744         }
 745 }
 746 EXPORT_SYMBOL(lustre_msg_buflen);
 747
 748 static inline void
 749 lustre_msg_set_buflen_v2(struct lustre_msg_v2 *m, __u32 n, __u32 len)
 750 {
 751         if (n >= m->lm_bufcount)
 752                 LBUG();
 753
 754         m->lm_buflens[n] = len;
 755 }
 756
 757 void lustre_msg_set_buflen(struct lustre_msg *m, __u32 n, __u32 len)
 758 {
 759         switch (m->lm_magic) {
 760         case LUSTRE_MSG_MAGIC_V2:
 761                 lustre_msg_set_buflen_v2(m, n, len);
 762                 return;
 763         default:
 764                 LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 765         }
 766 }
 767
 768 /*
 769  * NB return the bufcount for lustre_msg_v2 format, so if message is packed
 770  * in V1 format, the result is one bigger. (add struct ptlrpc_body).
 771  */
 772 __u32 lustre_msg_bufcount(struct lustre_msg *m)
 773 {
 774         switch (m->lm_magic) {
 775         case LUSTRE_MSG_MAGIC_V2:
 776                 return m->lm_bufcount;
 777         default:
 778                 CERROR("incorrect message magic: %08x\n", m->lm_magic);
 779                 return 0;
 780         }
 781 }
 782
 783 char *lustre_msg_string(struct lustre_msg *m, __u32 index, __u32 max_len)
 784 {
 785         /* max_len == 0 means the string should fill the buffer */
 786         char *str;
 787         __u32 slen, blen;
 788
 789         switch (m->lm_magic) {
 790         case LUSTRE_MSG_MAGIC_V2:
 791                 str = lustre_msg_buf_v2(m, index, 0);
 792                 blen = lustre_msg_buflen_v2(m, index);
 793                 break;
 794         default:
 795                 LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 796         }
 797
 798         if (str == NULL) {
 799                 CERROR("can't unpack string in msg %p buffer[%d]\n", m, index);
 800                 return NULL;
 801         }
 802
 803         slen = strnlen(str, blen);
 804
 805         if (slen == blen) { /* not NULL terminated */
 806                 CERROR("can't unpack non-NULL terminated string in msg %p buffer[%d] len %d\n",
 807                        m, index, blen);
 808                 return NULL;
 809         }
 810         if (blen > PTLRPC_MAX_BUFLEN) {
 811                 CERROR("buffer length of msg %p buffer[%d] is invalid(%d)\n",
 812                        m, index, blen);
 813                 return NULL;
 814         }
 815
 816         if (max_len == 0) {
 817                 if (slen != blen - 1) {
 818                         CERROR("can't unpack short string in msg %p buffer[%d] len %d: strlen %d\n",
 819                                m, index, blen, slen);
 820                         return NULL;
 821                 }
 822         } else if (slen > max_len) {
 823                 CERROR("can't unpack oversized string in msg %p buffer[%d] len %d strlen %d: max %d expected\n",
 824                        m, index, blen, slen, max_len);
 825                 return NULL;
 826         }
 827
 828         return str;
 829 }
 830
 831 /* Wrap up the normal fixed length cases */
 832 static inline void *__lustre_swab_buf(struct lustre_msg *msg, __u32 index,
 833                                       __u32 min_size, void *swabber)
 834 {
 835         void *ptr = NULL;
 836
 837         LASSERT(msg != NULL);
 838         switch (msg->lm_magic) {
 839         case LUSTRE_MSG_MAGIC_V2:
 840                 ptr = lustre_msg_buf_v2(msg, index, min_size);
 841                 break;
 842         default:
 843                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 844         }
 845
 846         if (ptr != NULL && swabber != NULL)
 847                 ((void (*)(void *))swabber)(ptr);
 848
 849         return ptr;
 850 }
 851
 852 static inline struct ptlrpc_body *lustre_msg_ptlrpc_body(struct lustre_msg *msg)
 853 {
 854         return lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
 855                                  sizeof(struct ptlrpc_body_v2));
 856 }
 857
 858 enum lustre_msghdr lustre_msghdr_get_flags(struct lustre_msg *msg)
 859 {
 860         switch (msg->lm_magic) {
 861         case LUSTRE_MSG_MAGIC_V2:
 862                 /* already in host endian */
 863                 return msg->lm_flags;
 864         default:
 865                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 866                 return 0;
 867         }
 868 }
 869 EXPORT_SYMBOL(lustre_msghdr_get_flags);
 870
 871 void lustre_msghdr_set_flags(struct lustre_msg *msg, __u32 flags)
 872 {
 873         switch (msg->lm_magic) {
 874         case LUSTRE_MSG_MAGIC_V2:
 875                 msg->lm_flags = flags;
 876                 return;
 877         default:
 878                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 879         }
 880 }
 881
 882 __u32 lustre_msg_get_flags(struct lustre_msg *msg)
 883 {
 884         switch (msg->lm_magic) {
 885         case LUSTRE_MSG_MAGIC_V2: {
 886                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 887                 if (pb != NULL)
 888                         return pb->pb_flags;
 889
 890                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 891         }
 892         fallthrough;
 893         default:
 894                 /*
 895                  * flags might be printed in debug code while message
 896                  * uninitialized
 897                  */
 898                 return 0;
 899         }
 900 }
 901 EXPORT_SYMBOL(lustre_msg_get_flags);
 902
 903 void lustre_msg_add_flags(struct lustre_msg *msg, __u32 flags)
 904 {
 905         switch (msg->lm_magic) {
 906         case LUSTRE_MSG_MAGIC_V2: {
 907                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 908                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 909                 pb->pb_flags |= flags;
 910                 return;
 911         }
 912         default:
 913                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 914         }
 915 }
 916 EXPORT_SYMBOL(lustre_msg_add_flags);
 917
 918 void lustre_msg_set_flags(struct lustre_msg *msg, __u32 flags)
 919 {
 920         switch (msg->lm_magic) {
 921         case LUSTRE_MSG_MAGIC_V2: {
 922                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 923                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 924                 pb->pb_flags = flags;
 925                 return;
 926         }
 927         default:
 928                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 929         }
 930 }
 931
 932 void lustre_msg_clear_flags(struct lustre_msg *msg, __u32 flags)
 933 {
 934         switch (msg->lm_magic) {
 935         case LUSTRE_MSG_MAGIC_V2: {
 936                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 937                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 938                 pb->pb_flags &= ~flags;
 939
 940                 return;
 941         }
 942         default:
 943                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 944         }
 945 }
 946 EXPORT_SYMBOL(lustre_msg_clear_flags);
 947
 948 __u32 lustre_msg_get_op_flags(struct lustre_msg *msg)
 949 {
 950         switch (msg->lm_magic) {
 951         case LUSTRE_MSG_MAGIC_V2: {
 952                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 953                 if (pb != NULL)
 954                         return pb->pb_op_flags;
 955
 956                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 957         }
 958         fallthrough;
 959         default:
 960                 return 0;
 961         }
 962 }
 963
 964 void lustre_msg_add_op_flags(struct lustre_msg *msg, __u32 flags)
 965 {
 966         switch (msg->lm_magic) {
 967         case LUSTRE_MSG_MAGIC_V2: {
 968                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 969                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 970                 pb->pb_op_flags |= flags;
 971                 return;
 972         }
 973         default:
 974                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 975         }
 976 }
 977 EXPORT_SYMBOL(lustre_msg_add_op_flags);
 978
 979 struct lustre_handle *lustre_msg_get_handle(struct lustre_msg *msg)
 980 {
 981         switch (msg->lm_magic) {
 982         case LUSTRE_MSG_MAGIC_V2: {
 983                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 984                 if (pb == NULL) {
 985                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 986                         return NULL;
 987                 }
 988                 return &pb->pb_handle;
 989         }
 990         default:
 991                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 992                 return NULL;
 993         }
 994 }
 995
 996 __u32 lustre_msg_get_type(struct lustre_msg *msg)
 997 {
 998         switch (msg->lm_magic) {
 999         case LUSTRE_MSG_MAGIC_V2: {
1000                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1001                 if (pb == NULL) {
1002                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1003                         return PTL_RPC_MSG_ERR;
1004                 }
1005                 return pb->pb_type;
1006         }
1007         default:
1008                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1009                 return PTL_RPC_MSG_ERR;
1010         }
1011 }
1012 EXPORT_SYMBOL(lustre_msg_get_type);
1013
1014 enum lustre_msg_version lustre_msg_get_version(struct lustre_msg *msg)
1015 {
1016         switch (msg->lm_magic) {
1017         case LUSTRE_MSG_MAGIC_V2: {
1018                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1019                 if (pb == NULL) {
1020                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1021                         return 0;
1022                 }
1023                 return pb->pb_version;
1024         }
1025         default:
1026                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1027                 return 0;
1028         }
1029 }
1030
1031 void lustre_msg_add_version(struct lustre_msg *msg, __u32 version)
1032 {
1033         switch (msg->lm_magic) {
1034         case LUSTRE_MSG_MAGIC_V2: {
1035                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1036                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1037                 pb->pb_version |= version;
1038                 return;
1039         }
1040         default:
1041                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1042         }
1043 }
1044
1045 __u32 lustre_msg_get_opc(struct lustre_msg *msg)
1046 {
1047         switch (msg->lm_magic) {
1048         case LUSTRE_MSG_MAGIC_V2: {
1049                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1050                 if (pb == NULL) {
1051                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1052                         return 0;
1053                 }
1054                 return pb->pb_opc;
1055         }
1056         default:
1057                 CERROR("incorrect message magic: %08x (msg:%p)\n",
1058                        msg->lm_magic, msg);
1059                 return 0;
1060         }
1061 }
1062 EXPORT_SYMBOL(lustre_msg_get_opc);
1063
1064 __u64 lustre_msg_get_last_xid(struct lustre_msg *msg)
1065 {
1066         switch (msg->lm_magic) {
1067         case LUSTRE_MSG_MAGIC_V2: {
1068                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1069                 if (pb == NULL) {
1070                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1071                         return 0;
1072                 }
1073                 return pb->pb_last_xid;
1074         }
1075         default:
1076                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1077                 return 0;
1078         }
1079 }
1080 EXPORT_SYMBOL(lustre_msg_get_last_xid);
1081
1082 __u16 lustre_msg_get_tag(struct lustre_msg *msg)
1083 {
1084         switch (msg->lm_magic) {
1085         case LUSTRE_MSG_MAGIC_V2: {
1086                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1087                 if (!pb) {
1088                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1089                         return 0;
1090                 }
1091                 return pb->pb_tag;
1092         }
1093         default:
1094                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1095                 return 0;
1096         }
1097 }
1098 EXPORT_SYMBOL(lustre_msg_get_tag);
1099
1100 __u64 lustre_msg_get_last_committed(struct lustre_msg *msg)
1101 {
1102         switch (msg->lm_magic) {
1103         case LUSTRE_MSG_MAGIC_V2: {
1104                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1105                 if (pb == NULL) {
1106                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1107                         return 0;
1108                 }
1109                 return pb->pb_last_committed;
1110         }
1111         default:
1112                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1113                 return 0;
1114         }
1115 }
1116 EXPORT_SYMBOL(lustre_msg_get_last_committed);
1117
1118 __u64 *lustre_msg_get_versions(struct lustre_msg *msg)
1119 {
1120         switch (msg->lm_magic) {
1121         case LUSTRE_MSG_MAGIC_V2: {
1122                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1123                 if (pb == NULL) {
1124                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1125                         return NULL;
1126                 }
1127                 return pb->pb_pre_versions;
1128         }
1129         default:
1130                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1131                 return NULL;
1132         }
1133 }
1134 EXPORT_SYMBOL(lustre_msg_get_versions);
1135
1136 __u64 lustre_msg_get_transno(struct lustre_msg *msg)
1137 {
1138         switch (msg->lm_magic) {
1139         case LUSTRE_MSG_MAGIC_V2: {
1140                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1141                 if (pb == NULL) {
1142                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1143                         return 0;
1144                 }
1145                 return pb->pb_transno;
1146         }
1147         default:
1148                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1149                 return 0;
1150         }
1151 }
1152 EXPORT_SYMBOL(lustre_msg_get_transno);
1153
1154 int lustre_msg_get_status(struct lustre_msg *msg)
1155 {
1156         switch (msg->lm_magic) {
1157         case LUSTRE_MSG_MAGIC_V2: {
1158                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1159                 if (pb != NULL)
1160                         return pb->pb_status;
1161                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1162         }
1163         fallthrough;
1164         default:
1165                 /*
1166                  * status might be printed in debug code while message
1167                  * uninitialized
1168                  */
1169                 return -EINVAL;
1170         }
1171 }
1172 EXPORT_SYMBOL(lustre_msg_get_status);
1173
1174 __u64 lustre_msg_get_slv(struct lustre_msg *msg)
1175 {
1176         switch (msg->lm_magic) {
1177         case LUSTRE_MSG_MAGIC_V2: {
1178                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1179                 if (pb == NULL) {
1180                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1181                         return -EINVAL;
1182                 }
1183                 return pb->pb_slv;
1184         }
1185         default:
1186                 CERROR("invalid msg magic %08x\n", msg->lm_magic);
1187                 return -EINVAL;
1188         }
1189 }
1190
1191
1192 void lustre_msg_set_slv(struct lustre_msg *msg, __u64 slv)
1193 {
1194         switch (msg->lm_magic) {
1195         case LUSTRE_MSG_MAGIC_V2: {
1196                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1197                 if (pb == NULL) {
1198                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1199                         return;
1200                 }
1201                 pb->pb_slv = slv;
1202                 return;
1203         }
1204         default:
1205                 CERROR("invalid msg magic %x\n", msg->lm_magic);
1206                 return;
1207         }
1208 }
1209
1210 __u32 lustre_msg_get_limit(struct lustre_msg *msg)
1211 {
1212         switch (msg->lm_magic) {
1213         case LUSTRE_MSG_MAGIC_V2: {
1214                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1215                 if (pb == NULL) {
1216                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1217                         return -EINVAL;
1218                 }
1219                 return pb->pb_limit;
1220         }
1221         default:
1222                 CERROR("invalid msg magic %x\n", msg->lm_magic);
1223                 return -EINVAL;
1224         }
1225 }
1226
1227
1228 void lustre_msg_set_limit(struct lustre_msg *msg, __u64 limit)
1229 {
1230         switch (msg->lm_magic) {
1231         case LUSTRE_MSG_MAGIC_V2: {
1232                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1233                 if (pb == NULL) {
1234                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1235                         return;
1236                 }
1237                 pb->pb_limit = limit;
1238                 return;
1239         }
1240         default:
1241                 CERROR("invalid msg magic %08x\n", msg->lm_magic);
1242                 return;
1243         }
1244 }
1245
1246 __u32 lustre_msg_get_conn_cnt(struct lustre_msg *msg)
1247 {
1248         switch (msg->lm_magic) {
1249         case LUSTRE_MSG_MAGIC_V2: {
1250                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1251                 if (pb == NULL) {
1252                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1253                         return 0;
1254                 }
1255                 return pb->pb_conn_cnt;
1256         }
1257         default:
1258                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1259                 return 0;
1260         }
1261 }
1262 EXPORT_SYMBOL(lustre_msg_get_conn_cnt);
1263
1264 __u32 lustre_msg_get_magic(struct lustre_msg *msg)
1265 {
1266         switch (msg->lm_magic) {
1267         case LUSTRE_MSG_MAGIC_V2:
1268                 return msg->lm_magic;
1269         default:
1270                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1271                 return 0;
1272         }
1273 }
1274
1275 timeout_t lustre_msg_get_timeout(struct lustre_msg *msg)
1276 {
1277         switch (msg->lm_magic) {
1278         case LUSTRE_MSG_MAGIC_V2: {
1279                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1280
1281                 if (pb == NULL) {
1282                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1283                         return 0;
1284                 }
1285                 return pb->pb_timeout;
1286         }
1287         default:
1288                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1289                 return 0;
1290         }
1291 }
1292
1293 timeout_t lustre_msg_get_service_timeout(struct lustre_msg *msg)
1294 {
1295         switch (msg->lm_magic) {
1296         case LUSTRE_MSG_MAGIC_V2: {
1297                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1298
1299                 if (pb == NULL) {
1300                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1301                         return 0;
1302                 }
1303                 return pb->pb_service_time;
1304         }
1305         default:
1306                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1307                 return 0;
1308         }
1309 }
1310
1311 int lustre_msg_get_uid_gid(struct lustre_msg *msg, __u32 *uid, __u32 *gid)
1312 {
1313         switch (msg->lm_magic) {
1314         case LUSTRE_MSG_MAGIC_V2: {
1315                 struct ptlrpc_body *pb;
1316
1317                 /* the old pltrpc_body_v2 is smaller; doesn't include uid/gid */
1318                 if (msg->lm_buflens[MSG_PTLRPC_BODY_OFF] <
1319                     sizeof(struct ptlrpc_body))
1320                         return -EOPNOTSUPP;
1321
1322                 pb = lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1323                                           sizeof(struct ptlrpc_body));
1324
1325                 if (!pb || !(pb->pb_flags & MSG_PACK_UID_GID))
1326                         return -EOPNOTSUPP;
1327
1328                 if (uid)
1329                         *uid = pb->pb_uid;
1330                 if (gid)
1331                         *gid = pb->pb_gid;
1332
1333                 return 0;
1334         }
1335         default:
1336                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1337                 return -EOPNOTSUPP;
1338         }
1339 }
1340 EXPORT_SYMBOL(lustre_msg_get_uid_gid);
1341
1342 char *lustre_msg_get_jobid(struct lustre_msg *msg)
1343 {
1344         switch (msg->lm_magic) {
1345         case LUSTRE_MSG_MAGIC_V2: {
1346                 struct ptlrpc_body *pb;
1347
1348                 /* the old pltrpc_body_v2 is smaller; doesn't include jobid */
1349                 if (msg->lm_buflens[MSG_PTLRPC_BODY_OFF] <
1350                     sizeof(struct ptlrpc_body))
1351                         return NULL;
1352
1353                 pb = lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1354                                           sizeof(struct ptlrpc_body));
1355                 if (!pb)
1356                         return NULL;
1357
1358                 /* If clients send unterminated jobids, terminate them here
1359                  * so that there is no chance of string overflow later.
1360                  */
1361                 if (unlikely(pb->pb_jobid[LUSTRE_JOBID_SIZE - 1] != '\0'))
1362                         pb->pb_jobid[LUSTRE_JOBID_SIZE - 1] = '\0';
1363
1364                 return pb->pb_jobid;
1365         }
1366         default:
1367                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1368                 return NULL;
1369         }
1370 }
1371 EXPORT_SYMBOL(lustre_msg_get_jobid);
1372
1373 __u32 lustre_msg_get_cksum(struct lustre_msg *msg)
1374 {
1375         switch (msg->lm_magic) {
1376         case LUSTRE_MSG_MAGIC_V2:
1377                 return msg->lm_cksum;
1378         default:
1379                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1380                 return 0;
1381         }
1382 }
1383
1384 __u64 lustre_msg_get_mbits(struct lustre_msg *msg)
1385 {
1386         switch (msg->lm_magic) {
1387         case LUSTRE_MSG_MAGIC_V2: {
1388                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1389                 if (pb == NULL) {
1390                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1391                         return 0;
1392                 }
1393                 return pb->pb_mbits;
1394         }
1395         default:
1396                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1397                 return 0;
1398         }
1399 }
1400
1401 __u32 lustre_msg_calc_cksum(struct lustre_msg *msg, __u32 buf)
1402 {
1403         switch (msg->lm_magic) {
1404         case LUSTRE_MSG_MAGIC_V2: {
1405                 struct ptlrpc_body *pb = lustre_msg_buf_v2(msg, buf, 0);
1406                 __u32 len = lustre_msg_buflen(msg, buf);
1407                 __u32 crc;
1408
1409 #if IS_ENABLED(CONFIG_CRC32)
1410                 /* about 10x faster than crypto_hash for small buffers */
1411                 crc = crc32_le(~(__u32)0, (unsigned char *)pb, len);
1412 #elif IS_ENABLED(CONFIG_CRYPTO_CRC32)
1413                 unsigned int hsize = 4;
1414
1415                 cfs_crypto_hash_digest(CFS_HASH_ALG_CRC32, (unsigned char *)pb,
1416                                        len, NULL, 0, (unsigned char *)&crc,
1417                                        &hsize);
1418 #else
1419 #error "need either CONFIG_CRC32 or CONFIG_CRYPTO_CRC32 enabled in the kernel"
1420 #endif
1421                 return crc;
1422         }
1423         default:
1424                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1425                 return 0;
1426         }
1427 }
1428
1429 void lustre_msg_set_handle(struct lustre_msg *msg, struct lustre_handle *handle)
1430 {
1431         switch (msg->lm_magic) {
1432         case LUSTRE_MSG_MAGIC_V2: {
1433                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1434                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1435                 pb->pb_handle = *handle;
1436                 return;
1437         }
1438         default:
1439                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1440         }
1441 }
1442
1443 void lustre_msg_set_type(struct lustre_msg *msg, __u32 type)
1444 {
1445         switch (msg->lm_magic) {
1446         case LUSTRE_MSG_MAGIC_V2: {
1447                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1448                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1449                 pb->pb_type = type;
1450                 return;
1451                 }
1452         default:
1453                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1454         }
1455 }
1456
1457 void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc)
1458 {
1459         switch (msg->lm_magic) {
1460         case LUSTRE_MSG_MAGIC_V2: {
1461                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1462                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1463                 pb->pb_opc = opc;
1464                 return;
1465         }
1466         default:
1467                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1468         }
1469 }
1470
1471 void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid)
1472 {
1473         switch (msg->lm_magic) {
1474         case LUSTRE_MSG_MAGIC_V2: {
1475                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1476                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1477                 pb->pb_last_xid = last_xid;
1478                 return;
1479         }
1480         default:
1481                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1482         }
1483 }
1484 EXPORT_SYMBOL(lustre_msg_set_last_xid);
1485
1486 void lustre_msg_set_tag(struct lustre_msg *msg, __u16 tag)
1487 {
1488         switch (msg->lm_magic) {
1489         case LUSTRE_MSG_MAGIC_V2: {
1490                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1491                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1492                 pb->pb_tag = tag;
1493                 return;
1494         }
1495         default:
1496                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1497         }
1498 }
1499 EXPORT_SYMBOL(lustre_msg_set_tag);
1500
1501 void lustre_msg_set_last_committed(struct lustre_msg *msg, __u64 last_committed)
1502 {
1503         switch (msg->lm_magic) {
1504         case LUSTRE_MSG_MAGIC_V2: {
1505                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1506                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1507                 pb->pb_last_committed = last_committed;
1508                 return;
1509         }
1510         default:
1511                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1512         }
1513 }
1514
1515 void lustre_msg_set_versions(struct lustre_msg *msg, __u64 *versions)
1516 {
1517         switch (msg->lm_magic) {
1518         case LUSTRE_MSG_MAGIC_V2: {
1519                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1520                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1521                 pb->pb_pre_versions[0] = versions[0];
1522                 pb->pb_pre_versions[1] = versions[1];
1523                 pb->pb_pre_versions[2] = versions[2];
1524                 pb->pb_pre_versions[3] = versions[3];
1525                 return;
1526         }
1527         default:
1528                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1529         }
1530 }
1531 EXPORT_SYMBOL(lustre_msg_set_versions);
1532
1533 void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno)
1534 {
1535         switch (msg->lm_magic) {
1536         case LUSTRE_MSG_MAGIC_V2: {
1537                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1538                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1539                 pb->pb_transno = transno;
1540                 return;
1541         }
1542         default:
1543                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1544         }
1545 }
1546 EXPORT_SYMBOL(lustre_msg_set_transno);
1547
1548 void lustre_msg_set_status(struct lustre_msg *msg, __u32 status)
1549 {
1550         switch (msg->lm_magic) {
1551         case LUSTRE_MSG_MAGIC_V2: {
1552                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1553                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1554                 pb->pb_status = status;
1555                 return;
1556         }
1557         default:
1558                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1559         }
1560 }
1561 EXPORT_SYMBOL(lustre_msg_set_status);
1562
1563 void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt)
1564 {
1565         switch (msg->lm_magic) {
1566         case LUSTRE_MSG_MAGIC_V2: {
1567                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1568                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1569                 pb->pb_conn_cnt = conn_cnt;
1570                 return;
1571         }
1572         default:
1573                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1574         }
1575 }
1576
1577 void lustre_msg_set_timeout(struct lustre_msg *msg, timeout_t timeout)
1578 {
1579         switch (msg->lm_magic) {
1580         case LUSTRE_MSG_MAGIC_V2: {
1581                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1582
1583                 LASSERT(timeout >= 0);
1584                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1585                 pb->pb_timeout = timeout;
1586                 return;
1587         }
1588         default:
1589                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1590         }
1591 }
1592
1593 void lustre_msg_set_service_timeout(struct lustre_msg *msg,
1594                                     timeout_t service_timeout)
1595 {
1596         switch (msg->lm_magic) {
1597         case LUSTRE_MSG_MAGIC_V2: {
1598                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1599
1600                 LASSERT(service_timeout >= 0);
1601                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1602                 pb->pb_service_time = service_timeout;
1603                 return;
1604         }
1605         default:
1606                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1607         }
1608 }
1609
1610 void lustre_msg_set_uid_gid(struct lustre_msg *msg, __u32 *uid, __u32 *gid)
1611 {
1612         switch (msg->lm_magic) {
1613         case LUSTRE_MSG_MAGIC_V2: {
1614                 __u32 opc = lustre_msg_get_opc(msg);
1615                 struct ptlrpc_body *pb;
1616
1617                 /* Don't set uid/gid for ldlm ast RPCs */
1618                 if (!opc || opc == LDLM_BL_CALLBACK ||
1619                     opc == LDLM_CP_CALLBACK || opc == LDLM_GL_CALLBACK)
1620                         return;
1621
1622                 pb = lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1623                                        sizeof(struct ptlrpc_body));
1624                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1625
1626                 if (uid && gid) {
1627                         pb->pb_uid = *uid;
1628                         pb->pb_gid = *gid;
1629                         pb->pb_flags |= MSG_PACK_UID_GID;
1630                 } else if (!(pb->pb_flags & MSG_PACK_UID_GID)) {
1631                         pb->pb_uid = from_kuid(&init_user_ns, current_uid());
1632                         pb->pb_gid = from_kgid(&init_user_ns, current_gid());
1633                         pb->pb_flags |= MSG_PACK_UID_GID;
1634                 }
1635
1636                 return;
1637         }
1638         default:
1639                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1640         }
1641 }
1642 EXPORT_SYMBOL(lustre_msg_set_uid_gid);
1643
1644 void lustre_msg_set_jobid(struct lustre_msg *msg, char *jobid)
1645 {
1646         switch (msg->lm_magic) {
1647         case LUSTRE_MSG_MAGIC_V2: {
1648                 __u32 opc = lustre_msg_get_opc(msg);
1649                 struct ptlrpc_body *pb;
1650
1651                 /* Don't set jobid for ldlm ast RPCs, they've been shrinked.
1652                  * See the comment in ptlrpc_request_pack(). */
1653                 if (!opc || opc == LDLM_BL_CALLBACK ||
1654                     opc == LDLM_CP_CALLBACK || opc == LDLM_GL_CALLBACK)
1655                         return;
1656
1657                 pb = lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1658                                        sizeof(struct ptlrpc_body));
1659                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1660
1661                 if (jobid != NULL)
1662                         memcpy(pb->pb_jobid, jobid, sizeof(pb->pb_jobid));
1663                 else if (pb->pb_jobid[0] == '\0')
1664                         lustre_get_jobid(pb->pb_jobid, sizeof(pb->pb_jobid));
1665                 return;
1666         }
1667         default:
1668                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1669         }
1670 }
1671 EXPORT_SYMBOL(lustre_msg_set_jobid);
1672
1673 void lustre_msg_set_cksum(struct lustre_msg *msg, __u32 cksum)
1674 {
1675         switch (msg->lm_magic) {
1676         case LUSTRE_MSG_MAGIC_V2:
1677                 msg->lm_cksum = cksum;
1678                 return;
1679         default:
1680                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1681         }
1682 }
1683
1684 void lustre_msg_set_mbits(struct lustre_msg *msg, __u64 mbits)
1685 {
1686         switch (msg->lm_magic) {
1687         case LUSTRE_MSG_MAGIC_V2: {
1688                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1689
1690                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1691                 pb->pb_mbits = mbits;
1692                 return;
1693         }
1694         default:
1695                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1696         }
1697 }
1698
1699 void ptlrpc_request_set_replen(struct ptlrpc_request *req)
1700 {
1701         int count = req_capsule_filled_sizes(&req->rq_pill, RCL_SERVER);
1702
1703         req->rq_replen = lustre_msg_size(req->rq_reqmsg->lm_magic, count,
1704                                          req->rq_pill.rc_area[RCL_SERVER]);
1705         if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
1706                 req->rq_reqmsg->lm_repsize = req->rq_replen;
1707 }
1708 EXPORT_SYMBOL(ptlrpc_request_set_replen);
1709
1710 void ptlrpc_req_set_repsize(struct ptlrpc_request *req, int count, __u32 *lens)
1711 {
1712         req->rq_replen = lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens);
1713         if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
1714                 req->rq_reqmsg->lm_repsize = req->rq_replen;
1715 }
1716
1717 /**
1718  * Send a remote set_info_async.
1719  *
1720  * This may go from client to server or server to client.
1721  */
1722 int do_set_info_async(struct obd_import *imp,
1723                       int opcode, int version,
1724                       size_t keylen, void *key,
1725                       size_t vallen, void *val,
1726                       struct ptlrpc_request_set *set)
1727 {
1728         struct ptlrpc_request *req;
1729         char *tmp;
1730         int rc;
1731
1732         ENTRY;
1733
1734         req = ptlrpc_request_alloc(imp, KEY_IS(KEY_CHANGELOG_CLEAR) ?
1735                                                 &RQF_MDT_SET_INFO :
1736                                                 &RQF_OBD_SET_INFO);
1737         if (req == NULL)
1738                 RETURN(-ENOMEM);
1739
1740         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1741                              RCL_CLIENT, keylen);
1742         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1743                              RCL_CLIENT, vallen);
1744         rc = ptlrpc_request_pack(req, version, opcode);
1745         if (rc) {
1746                 ptlrpc_request_free(req);
1747                 RETURN(rc);
1748         }
1749
1750         if (KEY_IS(KEY_CHANGELOG_CLEAR))
1751                 do_pack_body(req);
1752
1753         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1754         memcpy(tmp, key, keylen);
1755         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1756         memcpy(tmp, val, vallen);
1757
1758         ptlrpc_request_set_replen(req);
1759
1760         if (set) {
1761                 ptlrpc_set_add_req(set, req);
1762                 ptlrpc_check_set(NULL, set);
1763         } else {
1764                 rc = ptlrpc_queue_wait(req);
1765                 ptlrpc_req_finished(req);
1766         }
1767
1768         RETURN(rc);
1769 }
1770 EXPORT_SYMBOL(do_set_info_async);
1771
1772 /* byte flipping routines for all wire types declared in
1773  * lustre_idl.h implemented here.
1774  */
1775 void lustre_swab_ptlrpc_body(struct ptlrpc_body *body)
1776 {
1777         __swab32s(&body->pb_type);
1778         __swab32s(&body->pb_version);
1779         __swab32s(&body->pb_opc);
1780         __swab32s(&body->pb_status);
1781         __swab64s(&body->pb_last_xid);
1782         __swab16s(&body->pb_tag);
1783         BUILD_BUG_ON(offsetof(typeof(*body), pb_padding0) == 0);
1784         BUILD_BUG_ON(offsetof(typeof(*body), pb_padding1) == 0);
1785         __swab64s(&body->pb_last_committed);
1786         __swab64s(&body->pb_transno);
1787         __swab32s(&body->pb_flags);
1788         __swab32s(&body->pb_op_flags);
1789         __swab32s(&body->pb_conn_cnt);
1790         __swab32s(&body->pb_timeout);
1791         __swab32s(&body->pb_service_time);
1792         __swab32s(&body->pb_limit);
1793         __swab64s(&body->pb_slv);
1794         __swab64s(&body->pb_pre_versions[0]);
1795         __swab64s(&body->pb_pre_versions[1]);
1796         __swab64s(&body->pb_pre_versions[2]);
1797         __swab64s(&body->pb_pre_versions[3]);
1798         __swab64s(&body->pb_mbits);
1799         BUILD_BUG_ON(offsetof(typeof(*body), pb_padding64_0) == 0);
1800         BUILD_BUG_ON(offsetof(typeof(*body), pb_padding64_1) == 0);
1801         __swab32s(&body->pb_uid);
1802         __swab32s(&body->pb_gid);
1803         /*
1804          * While we need to maintain compatibility between
1805          * clients and servers without ptlrpc_body_v2 (< 2.3)
1806          * do not swab any fields beyond pb_jobid, as we are
1807          * using this swab function for both ptlrpc_body
1808          * and ptlrpc_body_v2.
1809          */
1810         /* pb_jobid is an ASCII string and should not be swabbed */
1811         BUILD_BUG_ON(offsetof(typeof(*body), pb_jobid) == 0);
1812 }
1813
1814 void lustre_swab_connect(struct obd_connect_data *ocd)
1815 {
1816         __swab64s(&ocd->ocd_connect_flags);
1817         __swab32s(&ocd->ocd_version);
1818         __swab32s(&ocd->ocd_grant);
1819         __swab64s(&ocd->ocd_ibits_known);
1820         __swab32s(&ocd->ocd_index);
1821         __swab32s(&ocd->ocd_brw_size);
1822         /*
1823          * ocd_blocksize and ocd_inodespace don't need to be swabbed because
1824          * they are 8-byte values
1825          */
1826         __swab16s(&ocd->ocd_grant_tax_kb);
1827         __swab32s(&ocd->ocd_grant_max_blks);
1828         __swab64s(&ocd->ocd_transno);
1829         __swab32s(&ocd->ocd_group);
1830         __swab32s(&ocd->ocd_cksum_types);
1831         __swab32s(&ocd->ocd_instance);
1832         /*
1833          * Fields after ocd_cksum_types are only accessible by the receiver
1834          * if the corresponding flag in ocd_connect_flags is set. Accessing
1835          * any field after ocd_maxbytes on the receiver without a valid flag
1836          * may result in out-of-bound memory access and kernel oops.
1837          */
1838         if (ocd->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)
1839                 __swab32s(&ocd->ocd_max_easize);
1840         if (ocd->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
1841                 __swab64s(&ocd->ocd_maxbytes);
1842         if (ocd->ocd_connect_flags & OBD_CONNECT_MULTIMODRPCS)
1843                 __swab16s(&ocd->ocd_maxmodrpcs);
1844         BUILD_BUG_ON(offsetof(typeof(*ocd), padding0) == 0);
1845         BUILD_BUG_ON(offsetof(typeof(*ocd), padding1) == 0);
1846         if (ocd->ocd_connect_flags & OBD_CONNECT_FLAGS2) {
1847                 __swab64s(&ocd->ocd_connect_flags2);
1848                 if (ocd->ocd_connect_flags2 & OBD_CONNECT2_COMPRESS)
1849                         __swab64s(&ocd->ocd_compr_type);
1850         }
1851         BUILD_BUG_ON(offsetof(typeof(*ocd), padding4) == 0);
1852         BUILD_BUG_ON(offsetof(typeof(*ocd), padding5) == 0);
1853         BUILD_BUG_ON(offsetof(typeof(*ocd), padding6) == 0);
1854         BUILD_BUG_ON(offsetof(typeof(*ocd), padding7) == 0);
1855         BUILD_BUG_ON(offsetof(typeof(*ocd), padding8) == 0);
1856         BUILD_BUG_ON(offsetof(typeof(*ocd), padding9) == 0);
1857         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingA) == 0);
1858         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingB) == 0);
1859         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingC) == 0);
1860         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingD) == 0);
1861         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingE) == 0);
1862         BUILD_BUG_ON(offsetof(typeof(*ocd), paddingF) == 0);
1863 }
1864
1865 static void lustre_swab_ost_layout(struct ost_layout *ol)
1866 {
1867         __swab32s(&ol->ol_stripe_size);
1868         __swab32s(&ol->ol_stripe_count);
1869         __swab64s(&ol->ol_comp_start);
1870         __swab64s(&ol->ol_comp_end);
1871         __swab32s(&ol->ol_comp_id);
1872 }
1873
1874 void lustre_swab_obdo(struct obdo *o)
1875 {
1876         __swab64s(&o->o_valid);
1877         lustre_swab_ost_id(&o->o_oi);
1878         __swab64s(&o->o_parent_seq);
1879         __swab64s(&o->o_size);
1880         __swab64s(&o->o_mtime);
1881         __swab64s(&o->o_atime);
1882         __swab64s(&o->o_ctime);
1883         __swab64s(&o->o_blocks);
1884         __swab64s(&o->o_grant);
1885         __swab32s(&o->o_blksize);
1886         __swab32s(&o->o_mode);
1887         __swab32s(&o->o_uid);
1888         __swab32s(&o->o_gid);
1889         __swab32s(&o->o_flags);
1890         __swab32s(&o->o_nlink);
1891         __swab32s(&o->o_parent_oid);
1892         __swab32s(&o->o_misc);
1893         __swab64s(&o->o_ioepoch);
1894         __swab32s(&o->o_stripe_idx);
1895         __swab32s(&o->o_parent_ver);
1896         lustre_swab_ost_layout(&o->o_layout);
1897         __swab32s(&o->o_layout_version);
1898         __swab32s(&o->o_uid_h);
1899         __swab32s(&o->o_gid_h);
1900         __swab64s(&o->o_data_version);
1901         __swab32s(&o->o_projid);
1902         BUILD_BUG_ON(offsetof(typeof(*o), o_padding_4) == 0);
1903         BUILD_BUG_ON(offsetof(typeof(*o), o_padding_5) == 0);
1904         BUILD_BUG_ON(offsetof(typeof(*o), o_padding_6) == 0);
1905
1906 }
1907 EXPORT_SYMBOL(lustre_swab_obdo);
1908
1909 void lustre_swab_obd_statfs(struct obd_statfs *os)
1910 {
1911         __swab64s(&os->os_type);
1912         __swab64s(&os->os_blocks);
1913         __swab64s(&os->os_bfree);
1914         __swab64s(&os->os_bavail);
1915         __swab64s(&os->os_files);
1916         __swab64s(&os->os_ffree);
1917         /* no need to swab os_fsid */
1918         __swab32s(&os->os_bsize);
1919         __swab32s(&os->os_namelen);
1920         __swab64s(&os->os_maxbytes);
1921         __swab32s(&os->os_state);
1922         __swab32s(&os->os_fprecreated);
1923         __swab32s(&os->os_granted);
1924         BUILD_BUG_ON(offsetof(typeof(*os), os_spare3) == 0);
1925         BUILD_BUG_ON(offsetof(typeof(*os), os_spare4) == 0);
1926         BUILD_BUG_ON(offsetof(typeof(*os), os_spare5) == 0);
1927         BUILD_BUG_ON(offsetof(typeof(*os), os_spare6) == 0);
1928         BUILD_BUG_ON(offsetof(typeof(*os), os_spare7) == 0);
1929         BUILD_BUG_ON(offsetof(typeof(*os), os_spare8) == 0);
1930         BUILD_BUG_ON(offsetof(typeof(*os), os_spare9) == 0);
1931 }
1932
1933 void lustre_swab_obd_ioobj(struct obd_ioobj *ioo)
1934 {
1935         lustre_swab_ost_id(&ioo->ioo_oid);
1936         __swab32s(&ioo->ioo_max_brw);
1937         __swab32s(&ioo->ioo_bufcnt);
1938 }
1939
1940 void lustre_swab_niobuf_remote(struct niobuf_remote *nbr)
1941 {
1942         __swab64s(&nbr->rnb_offset);
1943         __swab32s(&nbr->rnb_len);
1944         __swab32s(&nbr->rnb_flags);
1945 }
1946
1947 void lustre_swab_ost_body(struct ost_body *b)
1948 {
1949         lustre_swab_obdo(&b->oa);
1950 }
1951
1952 void lustre_swab_ost_last_id(u64 *id)
1953 {
1954         __swab64s(id);
1955 }
1956
1957 void lustre_swab_generic_32s(__u32 *val)
1958 {
1959         __swab32s(val);
1960 }
1961
1962 void lustre_swab_gl_lquota_desc(struct ldlm_gl_lquota_desc *desc)
1963 {
1964         lustre_swab_lu_fid(&desc->gl_id.qid_fid);
1965         __swab64s(&desc->gl_flags);
1966         __swab64s(&desc->gl_ver);
1967         __swab64s(&desc->gl_hardlimit);
1968         __swab64s(&desc->gl_softlimit);
1969         __swab64s(&desc->gl_time);
1970         BUILD_BUG_ON(offsetof(typeof(*desc), gl_pad2) == 0);
1971 }
1972 EXPORT_SYMBOL(lustre_swab_gl_lquota_desc);
1973
1974 void lustre_swab_gl_barrier_desc(struct ldlm_gl_barrier_desc *desc)
1975 {
1976         __swab32s(&desc->lgbd_status);
1977         __swab32s(&desc->lgbd_timeout);
1978         BUILD_BUG_ON(offsetof(typeof(*desc), lgbd_padding) == 0);
1979 }
1980 EXPORT_SYMBOL(lustre_swab_gl_barrier_desc);
1981
1982 void lustre_swab_ost_lvb_v1(struct ost_lvb_v1 *lvb)
1983 {
1984         __swab64s(&lvb->lvb_size);
1985         __swab64s(&lvb->lvb_mtime);
1986         __swab64s(&lvb->lvb_atime);
1987         __swab64s(&lvb->lvb_ctime);
1988         __swab64s(&lvb->lvb_blocks);
1989 }
1990 EXPORT_SYMBOL(lustre_swab_ost_lvb_v1);
1991
1992 void lustre_swab_ost_lvb(struct ost_lvb *lvb)
1993 {
1994         __swab64s(&lvb->lvb_size);
1995         __swab64s(&lvb->lvb_mtime);
1996         __swab64s(&lvb->lvb_atime);
1997         __swab64s(&lvb->lvb_ctime);
1998         __swab64s(&lvb->lvb_blocks);
1999         __swab32s(&lvb->lvb_mtime_ns);
2000         __swab32s(&lvb->lvb_atime_ns);
2001         __swab32s(&lvb->lvb_ctime_ns);
2002         __swab32s(&lvb->lvb_padding);
2003 }
2004 EXPORT_SYMBOL(lustre_swab_ost_lvb);
2005
2006 void lustre_swab_lquota_lvb(struct lquota_lvb *lvb)
2007 {
2008         __swab64s(&lvb->lvb_flags);
2009         __swab64s(&lvb->lvb_id_may_rel);
2010         __swab64s(&lvb->lvb_id_rel);
2011         __swab64s(&lvb->lvb_id_qunit);
2012         __swab64s(&lvb->lvb_pad1);
2013 }
2014 EXPORT_SYMBOL(lustre_swab_lquota_lvb);
2015
2016 void lustre_swab_barrier_lvb(struct barrier_lvb *lvb)
2017 {
2018         __swab32s(&lvb->lvb_status);
2019         __swab32s(&lvb->lvb_index);
2020         BUILD_BUG_ON(offsetof(typeof(*lvb), lvb_padding) == 0);
2021 }
2022 EXPORT_SYMBOL(lustre_swab_barrier_lvb);
2023
2024 void lustre_swab_mdt_body(struct mdt_body *b)
2025 {
2026         lustre_swab_lu_fid(&b->mbo_fid1);
2027         lustre_swab_lu_fid(&b->mbo_fid2);
2028         /* handle is opaque */
2029         __swab64s(&b->mbo_valid);
2030         __swab64s(&b->mbo_size);
2031         __swab64s(&b->mbo_mtime);
2032         __swab64s(&b->mbo_atime);
2033         __swab64s(&b->mbo_ctime);
2034         __swab64s(&b->mbo_blocks);
2035         __swab64s(&b->mbo_version);
2036         __swab64s(&b->mbo_t_state);
2037         __swab32s(&b->mbo_fsuid);
2038         __swab32s(&b->mbo_fsgid);
2039         __swab32s(&b->mbo_capability);
2040         __swab32s(&b->mbo_mode);
2041         __swab32s(&b->mbo_uid);
2042         __swab32s(&b->mbo_gid);
2043         __swab32s(&b->mbo_flags);
2044         __swab32s(&b->mbo_rdev);
2045         __swab32s(&b->mbo_nlink);
2046         __swab32s(&b->mbo_layout_gen);
2047         __swab32s(&b->mbo_suppgid);
2048         __swab32s(&b->mbo_eadatasize);
2049         __swab32s(&b->mbo_aclsize);
2050         __swab32s(&b->mbo_max_mdsize);
2051         BUILD_BUG_ON(offsetof(typeof(*b), mbo_unused3) == 0);
2052         __swab32s(&b->mbo_uid_h);
2053         __swab32s(&b->mbo_gid_h);
2054         __swab32s(&b->mbo_projid);
2055         __swab64s(&b->mbo_dom_size);
2056         __swab64s(&b->mbo_dom_blocks);
2057         __swab64s(&b->mbo_btime);
2058         BUILD_BUG_ON(offsetof(typeof(*b), mbo_padding_9) == 0);
2059         BUILD_BUG_ON(offsetof(typeof(*b), mbo_padding_10) == 0);
2060 }
2061
2062 void lustre_swab_mdt_ioepoch(struct mdt_ioepoch *b)
2063 {
2064         /* mio_open_handle is opaque */
2065         BUILD_BUG_ON(offsetof(typeof(*b), mio_unused1) == 0);
2066         BUILD_BUG_ON(offsetof(typeof(*b), mio_unused2) == 0);
2067         BUILD_BUG_ON(offsetof(typeof(*b), mio_padding) == 0);
2068 }
2069
2070 void lustre_swab_mgs_target_info(struct mgs_target_info *mti)
2071 {
2072         int i;
2073
2074         __swab32s(&mti->mti_lustre_ver);
2075         __swab32s(&mti->mti_stripe_index);
2076         __swab32s(&mti->mti_config_ver);
2077         __swab32s(&mti->mti_flags);
2078         __swab32s(&mti->mti_instance);
2079         __swab32s(&mti->mti_nid_count);
2080         BUILD_BUG_ON(sizeof(lnet_nid_t) != sizeof(u64));
2081
2082         /* For NID string we never need to swab */
2083         if (target_supports_large_nid(mti))
2084                 return;
2085
2086         for (i = 0; i < MTI_NIDS_MAX; i++)
2087                 __swab64s(&mti->mti_nids[i]);
2088 }
2089
2090 void lustre_swab_mgs_nidtbl_entry_header(struct mgs_nidtbl_entry *entry)
2091 {
2092         __swab64s(&entry->mne_version);
2093         __swab32s(&entry->mne_instance);
2094         __swab32s(&entry->mne_index);
2095         __swab32s(&entry->mne_length);
2096
2097         /* mne_nid_(count|type) must be one byte size because we're going to
2098          * access it w/o swapping.
2099          */
2100         BUILD_BUG_ON(sizeof(entry->mne_nid_count) != sizeof(u8));
2101         BUILD_BUG_ON(sizeof(entry->mne_nid_type) != sizeof(u8));
2102
2103 }
2104 EXPORT_SYMBOL(lustre_swab_mgs_nidtbl_entry_header);
2105
2106 void lustre_swab_mgs_nidtbl_entry_content(struct mgs_nidtbl_entry *entry)
2107 {
2108         int i;
2109
2110         /* Large NIDs are always big endian so we don't need swapping */
2111         if (entry->mne_nid_type)
2112                 return;
2113
2114         for (i = 0; i < entry->mne_nid_count; i++)
2115                 __swab64s(&entry->u.nids[i]);
2116 }
2117 EXPORT_SYMBOL(lustre_swab_mgs_nidtbl_entry_content);
2118
2119 void lustre_swab_mgs_config_body(struct mgs_config_body *body)
2120 {
2121         __swab64s(&body->mcb_offset);
2122         __swab32s(&body->mcb_units);
2123         __swab16s(&body->mcb_type);
2124 }
2125
2126 void lustre_swab_mgs_config_res(struct mgs_config_res *body)
2127 {
2128         __swab64s(&body->mcr_offset);
2129         __swab64s(&body->mcr_size);
2130 }
2131
2132 static void lustre_swab_obd_dqinfo(struct obd_dqinfo *i)
2133 {
2134         __swab64s(&i->dqi_bgrace);
2135         __swab64s(&i->dqi_igrace);
2136         __swab32s(&i->dqi_flags);
2137         __swab32s(&i->dqi_valid);
2138 }
2139
2140 static void lustre_swab_obd_dqblk(struct obd_dqblk *b)
2141 {
2142         __swab64s(&b->dqb_ihardlimit);
2143         __swab64s(&b->dqb_isoftlimit);
2144         __swab64s(&b->dqb_curinodes);
2145         __swab64s(&b->dqb_bhardlimit);
2146         __swab64s(&b->dqb_bsoftlimit);
2147         __swab64s(&b->dqb_curspace);
2148         __swab64s(&b->dqb_btime);
2149         __swab64s(&b->dqb_itime);
2150         __swab32s(&b->dqb_valid);
2151         BUILD_BUG_ON(offsetof(typeof(*b), dqb_padding) == 0);
2152 }
2153
2154 int lustre_swab_obd_quotactl(struct obd_quotactl *q, __u32 len)
2155 {
2156         if (unlikely(len <= sizeof(struct obd_quotactl)))
2157                 return -EOVERFLOW;
2158
2159         __swab32s(&q->qc_cmd);
2160         __swab32s(&q->qc_type);
2161         __swab32s(&q->qc_id);
2162         __swab32s(&q->qc_stat);
2163         lustre_swab_obd_dqinfo(&q->qc_dqinfo);
2164         lustre_swab_obd_dqblk(&q->qc_dqblk);
2165
2166         return len;
2167 }
2168
2169 void lustre_swab_fid2path(struct getinfo_fid2path *gf)
2170 {
2171         lustre_swab_lu_fid(&gf->gf_fid);
2172         __swab64s(&gf->gf_recno);
2173         __swab32s(&gf->gf_linkno);
2174         __swab32s(&gf->gf_pathlen);
2175 }
2176 EXPORT_SYMBOL(lustre_swab_fid2path);
2177
2178 static void lustre_swab_fiemap_extent(struct fiemap_extent *fm_extent)
2179 {
2180         __swab64s(&fm_extent->fe_logical);
2181         __swab64s(&fm_extent->fe_physical);
2182         __swab64s(&fm_extent->fe_length);
2183         __swab32s(&fm_extent->fe_flags);
2184         __swab32s(&fm_extent->fe_device);
2185 }
2186
2187 static void lustre_swab_fiemap_hdr(struct fiemap *fiemap)
2188 {
2189         __swab64s(&fiemap->fm_start);
2190         __swab64s(&fiemap->fm_length);
2191         __swab32s(&fiemap->fm_flags);
2192         __swab32s(&fiemap->fm_mapped_extents);
2193         __swab32s(&fiemap->fm_extent_count);
2194         __swab32s(&fiemap->fm_reserved);
2195 }
2196
2197 int lustre_swab_fiemap(struct fiemap *fiemap, __u32 len)
2198 {
2199         __u32 i, size, count;
2200
2201         lustre_swab_fiemap_hdr(fiemap);
2202
2203         size = fiemap_count_to_size(fiemap->fm_mapped_extents);
2204         count = fiemap->fm_mapped_extents;
2205         if (unlikely(size > len)) {
2206                 count = (len - sizeof(struct fiemap)) /
2207                         sizeof(struct fiemap_extent);
2208                 fiemap->fm_mapped_extents = count;
2209                 size = -EOVERFLOW;
2210         }
2211         /* still swab extents as we cannot yet pass rc to callers */
2212         for (i = 0; i < count; i++)
2213                 lustre_swab_fiemap_extent(&fiemap->fm_extents[i]);
2214
2215         return size;
2216 }
2217
2218 void lustre_swab_fiemap_info_key(struct ll_fiemap_info_key *fiemap_info)
2219 {
2220         lustre_swab_obdo(&fiemap_info->lfik_oa);
2221         lustre_swab_fiemap_hdr(&fiemap_info->lfik_fiemap);
2222 }
2223
2224 void lustre_swab_idx_info(struct idx_info *ii)
2225 {
2226         __swab32s(&ii->ii_magic);
2227         __swab32s(&ii->ii_flags);
2228         __swab16s(&ii->ii_count);
2229         __swab32s(&ii->ii_attrs);
2230         lustre_swab_lu_fid(&ii->ii_fid);
2231         __swab64s(&ii->ii_version);
2232         __swab64s(&ii->ii_hash_start);
2233         __swab64s(&ii->ii_hash_end);
2234         __swab16s(&ii->ii_keysize);
2235         __swab16s(&ii->ii_recsize);
2236 }
2237
2238 void lustre_swab_lip_header(struct lu_idxpage *lip)
2239 {
2240         /* swab header */
2241         __swab32s(&lip->lip_magic);
2242         __swab16s(&lip->lip_flags);
2243         __swab16s(&lip->lip_nr);
2244 }
2245 EXPORT_SYMBOL(lustre_swab_lip_header);
2246
2247 void lustre_swab_mdt_rec_reint (struct mdt_rec_reint *rr)
2248 {
2249         __swab32s(&rr->rr_opcode);
2250         __swab32s(&rr->rr_cap);
2251         __swab32s(&rr->rr_fsuid);
2252         /* rr_fsuid_h is unused */
2253         __swab32s(&rr->rr_fsgid);
2254         /* rr_fsgid_h is unused */
2255         __swab32s(&rr->rr_suppgid1);
2256         /* rr_suppgid1_h is unused */
2257         __swab32s(&rr->rr_suppgid2);
2258         /* rr_suppgid2_h is unused */
2259         lustre_swab_lu_fid(&rr->rr_fid1);
2260         lustre_swab_lu_fid(&rr->rr_fid2);
2261         __swab64s(&rr->rr_mtime);
2262         __swab64s(&rr->rr_atime);
2263         __swab64s(&rr->rr_ctime);
2264         __swab64s(&rr->rr_size);
2265         __swab64s(&rr->rr_blocks);
2266         __swab32s(&rr->rr_bias);
2267         __swab32s(&rr->rr_mode);
2268         __swab32s(&rr->rr_flags);
2269         __swab32s(&rr->rr_flags_h);
2270         __swab32s(&rr->rr_umask);
2271         __swab16s(&rr->rr_mirror_id);
2272
2273         BUILD_BUG_ON(offsetof(typeof(*rr), rr_padding_4) == 0);
2274 };
2275
2276 void lustre_swab_lov_desc(struct lov_desc *ld)
2277 {
2278         __swab32s(&ld->ld_tgt_count);
2279         __swab32s(&ld->ld_active_tgt_count);
2280         __swab32s(&ld->ld_default_stripe_count);
2281         __swab32s(&ld->ld_pattern);
2282         __swab64s(&ld->ld_default_stripe_size);
2283         __swab64s(&ld->ld_default_stripe_offset);
2284         __swab32s(&ld->ld_qos_maxage);
2285         /* uuid endian insensitive */
2286 }
2287 EXPORT_SYMBOL(lustre_swab_lov_desc);
2288
2289 void lustre_swab_lmv_desc(struct lmv_desc *ld)
2290 {
2291         __swab32s(&ld->ld_tgt_count);
2292         __swab32s(&ld->ld_active_tgt_count);
2293         __swab32s(&ld->ld_default_stripe_count);
2294         __swab32s(&ld->ld_pattern);
2295         __swab64s(&ld->ld_default_hash_size);
2296         __swab32s(&ld->ld_qos_maxage);
2297         /* uuid endian insensitive */
2298 }
2299
2300 /* This structure is always in little-endian */
2301 static void lustre_swab_lmv_mds_md_v1(struct lmv_mds_md_v1 *lmm1)
2302 {
2303         int i;
2304
2305         __swab32s(&lmm1->lmv_magic);
2306         __swab32s(&lmm1->lmv_stripe_count);
2307         __swab32s(&lmm1->lmv_master_mdt_index);
2308         __swab32s(&lmm1->lmv_hash_type);
2309         __swab32s(&lmm1->lmv_layout_version);
2310         for (i = 0; i < lmm1->lmv_stripe_count; i++)
2311                 lustre_swab_lu_fid(&lmm1->lmv_stripe_fids[i]);
2312 }
2313
2314 void lustre_swab_lmv_mds_md(union lmv_mds_md *lmm)
2315 {
2316         switch (lmm->lmv_magic) {
2317         case LMV_MAGIC_V1:
2318                 lustre_swab_lmv_mds_md_v1(&lmm->lmv_md_v1);
2319                 break;
2320         default:
2321                 break;
2322         }
2323 }
2324 EXPORT_SYMBOL(lustre_swab_lmv_mds_md);
2325
2326 void lustre_swab_lmv_user_md_objects(struct lmv_user_mds_data *lmd,
2327                                      int stripe_count)
2328 {
2329         int i;
2330
2331         for (i = 0; i < stripe_count; i++)
2332                 __swab32s(&(lmd[i].lum_mds));
2333 }
2334 EXPORT_SYMBOL(lustre_swab_lmv_user_md_objects);
2335
2336
2337 void lustre_swab_lmv_user_md(struct lmv_user_md *lum)
2338 {
2339         __u32 count;
2340
2341         if (lum->lum_magic == LMV_MAGIC_FOREIGN) {
2342                 __swab32s(&lum->lum_magic);
2343                 __swab32s(&((struct lmv_foreign_md *)lum)->lfm_length);
2344                 __swab32s(&((struct lmv_foreign_md *)lum)->lfm_type);
2345                 __swab32s(&((struct lmv_foreign_md *)lum)->lfm_flags);
2346                 return;
2347         }
2348
2349         count = lum->lum_stripe_count;
2350         __swab32s(&lum->lum_magic);
2351         __swab32s(&lum->lum_stripe_count);
2352         __swab32s(&lum->lum_stripe_offset);
2353         __swab32s(&lum->lum_hash_type);
2354         __swab32s(&lum->lum_type);
2355         /* lum_max_inherit and lum_max_inherit_rr do not need to be swabbed */
2356         BUILD_BUG_ON(offsetof(typeof(*lum), lum_padding1) == 0);
2357         BUILD_BUG_ON(offsetof(typeof(*lum), lum_padding2) == 0);
2358         BUILD_BUG_ON(offsetof(typeof(*lum), lum_padding3) == 0);
2359         switch (lum->lum_magic) {
2360         case LMV_USER_MAGIC_SPECIFIC:
2361                 count = lum->lum_stripe_count;
2362                 fallthrough;
2363         case __swab32(LMV_USER_MAGIC_SPECIFIC):
2364                 lustre_swab_lmv_user_md_objects(lum->lum_objects, count);
2365                 break;
2366         default:
2367                 break;
2368         }
2369 }
2370 EXPORT_SYMBOL(lustre_swab_lmv_user_md);
2371
2372 static void lustre_print_v1v3(unsigned int lvl, struct lov_user_md *lum,
2373                               const char *msg)
2374 {
2375         CDEBUG(lvl, "%s lov_user_md %p:\n", msg, lum);
2376         CDEBUG(lvl, "\tlmm_magic: %#x\n", lum->lmm_magic);
2377         CDEBUG(lvl, "\tlmm_pattern: %#x\n", lum->lmm_pattern);
2378         CDEBUG(lvl, "\tlmm_object_id: %llu\n", lmm_oi_id(&lum->lmm_oi));
2379         CDEBUG(lvl, "\tlmm_object_gr: %llu\n", lmm_oi_seq(&lum->lmm_oi));
2380         CDEBUG(lvl, "\tlmm_stripe_size: %#x\n", lum->lmm_stripe_size);
2381         CDEBUG(lvl, "\tlmm_stripe_count: %#x\n", lum->lmm_stripe_count);
2382         CDEBUG(lvl, "\tlmm_stripe_offset/lmm_layout_gen: %#x\n",
2383                lum->lmm_stripe_offset);
2384         if (lum->lmm_magic == LOV_USER_MAGIC_V3) {
2385                 struct lov_user_md_v3 *v3 = (void *)lum;
2386                 CDEBUG(lvl, "\tlmm_pool_name: %s\n", v3->lmm_pool_name);
2387         }
2388         if (lum->lmm_magic == LOV_USER_MAGIC_SPECIFIC) {
2389                 struct lov_user_md_v3 *v3 = (void *)lum;
2390                 int i;
2391
2392                 if (v3->lmm_pool_name[0] != '\0')
2393                         CDEBUG(lvl, "\tlmm_pool_name: %s\n", v3->lmm_pool_name);
2394
2395                 CDEBUG(lvl, "\ttarget list:\n");
2396                 for (i = 0; i < v3->lmm_stripe_count; i++)
2397                         CDEBUG(lvl, "\t\t%u\n", v3->lmm_objects[i].l_ost_idx);
2398         }
2399 }
2400
2401 static void lustre_print_foreign(unsigned int lvl, struct lov_foreign_md *lfm,
2402                                  const char *msg)
2403 {
2404         CDEBUG(lvl, "%s lov_foreign_md %p:\n", msg, lfm);
2405         CDEBUG(lvl, "\tlfm_magic: %#X\n", lfm->lfm_magic);
2406         CDEBUG(lvl, "\tlfm_length: %u\n", lfm->lfm_length);
2407         CDEBUG(lvl, "\tlfm_type: %#X\n", lfm->lfm_type);
2408         CDEBUG(lvl, "\tlfm_flags: %#X\n", lfm->lfm_flags);
2409 }
2410
2411 void lustre_print_user_md(unsigned int lvl, struct lov_user_md *lum,
2412                           const char *msg)
2413 {
2414         struct lov_comp_md_v1   *comp_v1;
2415         int                      i;
2416
2417         if (likely(!cfs_cdebug_show(lvl, DEBUG_SUBSYSTEM)))
2418                 return;
2419
2420         if (lum->lmm_magic == LOV_USER_MAGIC_V1 ||
2421             lum->lmm_magic == LOV_USER_MAGIC_V3) {
2422                 lustre_print_v1v3(lvl, lum, msg);
2423                 return;
2424         }
2425
2426         if (lum->lmm_magic != LOV_USER_MAGIC_COMP_V1) {
2427                 CDEBUG(lvl, "%s: bad magic: %x\n", msg, lum->lmm_magic);
2428                 return;
2429         }
2430
2431         comp_v1 = (struct lov_comp_md_v1 *)lum;
2432         CDEBUG(lvl, "%s: lov_comp_md_v1 %p:\n", msg, lum);
2433         CDEBUG(lvl, "\tlcm_magic: %#x\n", comp_v1->lcm_magic);
2434         CDEBUG(lvl, "\tlcm_size: %#x\n", comp_v1->lcm_size);
2435         CDEBUG(lvl, "\tlcm_layout_gen: %#x\n", comp_v1->lcm_layout_gen);
2436         CDEBUG(lvl, "\tlcm_flags: %#x\n", comp_v1->lcm_flags);
2437         CDEBUG(lvl, "\tlcm_entry_count: %#x\n\n", comp_v1->lcm_entry_count);
2438         CDEBUG(lvl, "\tlcm_mirror_count: %#x\n\n", comp_v1->lcm_mirror_count);
2439
2440         for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2441                 struct lov_comp_md_entry_v1 *ent = &comp_v1->lcm_entries[i];
2442                 struct lov_user_md *v1;
2443
2444                 CDEBUG(lvl, "\tentry %d:\n", i);
2445                 CDEBUG(lvl, "\tlcme_id: %#x\n", ent->lcme_id);
2446                 CDEBUG(lvl, "\tlcme_flags: %#x\n", ent->lcme_flags);
2447                 if (ent->lcme_flags & LCME_FL_NOSYNC)
2448                         CDEBUG(lvl, "\tlcme_timestamp: %llu\n",
2449                                         ent->lcme_timestamp);
2450                 CDEBUG(lvl, "\tlcme_extent.e_start: %llu\n",
2451                        ent->lcme_extent.e_start);
2452                 CDEBUG(lvl, "\tlcme_extent.e_end: %llu\n",
2453                        ent->lcme_extent.e_end);
2454                 CDEBUG(lvl, "\tlcme_offset: %#x\n", ent->lcme_offset);
2455                 CDEBUG(lvl, "\tlcme_size: %#x\n\n", ent->lcme_size);
2456
2457                 v1 = (struct lov_user_md *)((char *)comp_v1 +
2458                                 comp_v1->lcm_entries[i].lcme_offset);
2459                 if (v1->lmm_magic == LOV_MAGIC_FOREIGN)
2460                         lustre_print_foreign(lvl, (struct lov_foreign_md *)v1,
2461                                              msg);
2462                 else
2463                         lustre_print_v1v3(lvl, v1, msg);
2464         }
2465 }
2466 EXPORT_SYMBOL(lustre_print_user_md);
2467
2468 static void lustre_swab_lmm_oi(struct ost_id *oi)
2469 {
2470         __swab64s(&oi->oi.oi_id);
2471         __swab64s(&oi->oi.oi_seq);
2472 }
2473
2474 static void lustre_swab_lov_user_md_common(struct lov_user_md_v1 *lum)
2475 {
2476         ENTRY;
2477         __swab32s(&lum->lmm_magic);
2478         __swab32s(&lum->lmm_pattern);
2479         lustre_swab_lmm_oi(&lum->lmm_oi);
2480         __swab32s(&lum->lmm_stripe_size);
2481         __swab16s(&lum->lmm_stripe_count);
2482         __swab16s(&lum->lmm_stripe_offset);
2483         EXIT;
2484 }
2485
2486 void lustre_swab_lov_user_md_v1(struct lov_user_md_v1 *lum)
2487 {
2488         ENTRY;
2489         CDEBUG(D_IOCTL, "swabbing lov_user_md v1\n");
2490         lustre_swab_lov_user_md_common(lum);
2491         EXIT;
2492 }
2493 EXPORT_SYMBOL(lustre_swab_lov_user_md_v1);
2494
2495 void lustre_swab_lov_user_md_v3(struct lov_user_md_v3 *lum)
2496 {
2497         ENTRY;
2498         CDEBUG(D_IOCTL, "swabbing lov_user_md v3\n");
2499         lustre_swab_lov_user_md_common((struct lov_user_md_v1 *)lum);
2500         /* lmm_pool_name nothing to do with char */
2501         EXIT;
2502 }
2503 EXPORT_SYMBOL(lustre_swab_lov_user_md_v3);
2504
2505 static void lustre_swab_lov_hsm_md(struct lov_hsm_md *lhm)
2506 {
2507         ENTRY;
2508         CDEBUG(D_IOCTL, "swabbing lov_hsm_md\n");
2509         __swab32s(&lhm->lhm_magic);
2510         __swab32s(&lhm->lhm_length);
2511         __swab32s(&lhm->lhm_type);
2512         __swab32s(&lhm->lhm_flags);
2513
2514         if (lov_hsm_type_supported(lhm->lhm_type)) {
2515                 __swab64s(&lhm->lhm_archive_id);
2516                 __swab64s(&lhm->lhm_archive_ver);
2517         }
2518         EXIT;
2519 }
2520
2521 void lustre_swab_lov_comp_md_v1(struct lov_comp_md_v1 *lum)
2522 {
2523         struct lov_comp_md_entry_v1     *ent;
2524         struct lov_user_md_v1   *v1;
2525         struct lov_user_md_v3   *v3;
2526         int     i;
2527         bool    cpu_endian;
2528         __u32   off, size;
2529         __u16   ent_count, stripe_count;
2530         ENTRY;
2531
2532         cpu_endian = lum->lcm_magic == LOV_USER_MAGIC_COMP_V1;
2533         ent_count = lum->lcm_entry_count;
2534         if (!cpu_endian)
2535                 __swab16s(&ent_count);
2536
2537         CDEBUG(D_IOCTL, "swabbing lov_user_comp_md v1\n");
2538         __swab32s(&lum->lcm_magic);
2539         __swab32s(&lum->lcm_size);
2540         __swab32s(&lum->lcm_layout_gen);
2541         __swab16s(&lum->lcm_flags);
2542         __swab16s(&lum->lcm_entry_count);
2543         __swab16s(&lum->lcm_mirror_count);
2544         /* no need to swab lcm_ec_count */
2545         BUILD_BUG_ON(offsetof(typeof(*lum), lcm_padding1) == 0);
2546         BUILD_BUG_ON(offsetof(typeof(*lum), lcm_padding2) == 0);
2547         BUILD_BUG_ON(offsetof(typeof(*lum), lcm_padding3) == 0);
2548
2549         for (i = 0; i < ent_count; i++) {
2550                 ent = &lum->lcm_entries[i];
2551                 off = ent->lcme_offset;
2552                 size = ent->lcme_size;
2553
2554                 if (!cpu_endian) {
2555                         __swab32s(&off);
2556                         __swab32s(&size);
2557                 }
2558                 __swab32s(&ent->lcme_id);
2559                 __swab32s(&ent->lcme_flags);
2560                 __swab64s(&ent->lcme_timestamp);
2561                 __swab64s(&ent->lcme_extent.e_start);
2562                 __swab64s(&ent->lcme_extent.e_end);
2563                 __swab32s(&ent->lcme_offset);
2564                 __swab32s(&ent->lcme_size);
2565                 __swab32s(&ent->lcme_layout_gen);
2566                 /* no need to swab lcme_dstripe_count */
2567                 /* no need to swab lcme_cstripe_count */
2568
2569                 v1 = (struct lov_user_md_v1 *)((char *)lum + off);
2570                 if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_FOREIGN) ||
2571                     v1->lmm_magic == LOV_USER_MAGIC_FOREIGN) {
2572                         lustre_swab_lov_hsm_md((struct lov_hsm_md *)v1);
2573                         return;
2574                 }
2575
2576                 stripe_count = v1->lmm_stripe_count;
2577                 if (!cpu_endian)
2578                         __swab16s(&stripe_count);
2579
2580                 if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1) ||
2581                     v1->lmm_magic == LOV_USER_MAGIC_V1) {
2582                         lustre_swab_lov_user_md_v1(v1);
2583                         if (size > sizeof(*v1))
2584                                 lustre_swab_lov_user_md_objects(v1->lmm_objects,
2585                                                                 stripe_count);
2586                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3) ||
2587                            v1->lmm_magic == LOV_USER_MAGIC_V3 ||
2588                            v1->lmm_magic == __swab32(LOV_USER_MAGIC_SPECIFIC) ||
2589                            v1->lmm_magic == LOV_USER_MAGIC_SPECIFIC) {
2590                         v3 = (struct lov_user_md_v3 *)v1;
2591                         lustre_swab_lov_user_md_v3(v3);
2592                         if (size > sizeof(*v3))
2593                                 lustre_swab_lov_user_md_objects(v3->lmm_objects,
2594                                                                 stripe_count);
2595                 } else {
2596                         CERROR("Invalid magic %#x\n", v1->lmm_magic);
2597                 }
2598         }
2599 }
2600 EXPORT_SYMBOL(lustre_swab_lov_comp_md_v1);
2601
2602 void lustre_swab_lov_user_md_objects(struct lov_user_ost_data *lod,
2603                                      int stripe_count)
2604 {
2605         int i;
2606
2607         ENTRY;
2608         for (i = 0; i < stripe_count; i++) {
2609                 lustre_swab_ost_id(&(lod[i].l_ost_oi));
2610                 __swab32s(&(lod[i].l_ost_gen));
2611                 __swab32s(&(lod[i].l_ost_idx));
2612         }
2613         EXIT;
2614 }
2615 EXPORT_SYMBOL(lustre_swab_lov_user_md_objects);
2616
2617 void lustre_swab_lov_user_md(struct lov_user_md *lum, size_t size)
2618 {
2619         struct lov_user_md_v1 *v1;
2620         struct lov_user_md_v3 *v3;
2621         struct lov_foreign_md *lfm;
2622         __u16 stripe_count;
2623         ENTRY;
2624
2625         CDEBUG(D_IOCTL, "swabbing lov_user_md\n");
2626         switch (lum->lmm_magic) {
2627         case __swab32(LOV_MAGIC_V1):
2628         case LOV_USER_MAGIC_V1:
2629         {
2630                 v1 = (struct lov_user_md_v1 *)lum;
2631                 stripe_count = v1->lmm_stripe_count;
2632
2633                 if (lum->lmm_magic != LOV_USER_MAGIC_V1)
2634                         __swab16s(&stripe_count);
2635
2636                 lustre_swab_lov_user_md_v1(v1);
2637                 if (size > sizeof(*v1))
2638                         lustre_swab_lov_user_md_objects(v1->lmm_objects,
2639                                                         stripe_count);
2640
2641                 break;
2642         }
2643         case __swab32(LOV_MAGIC_V3):
2644         case LOV_USER_MAGIC_V3:
2645         {
2646                 v3 = (struct lov_user_md_v3 *)lum;
2647                 stripe_count = v3->lmm_stripe_count;
2648
2649                 if (lum->lmm_magic != LOV_USER_MAGIC_V3)
2650                         __swab16s(&stripe_count);
2651
2652                 lustre_swab_lov_user_md_v3(v3);
2653                 if (size > sizeof(*v3))
2654                         lustre_swab_lov_user_md_objects(v3->lmm_objects,
2655                                                         stripe_count);
2656                 break;
2657         }
2658         case __swab32(LOV_USER_MAGIC_SPECIFIC):
2659         case LOV_USER_MAGIC_SPECIFIC:
2660         {
2661                 v3 = (struct lov_user_md_v3 *)lum;
2662                 stripe_count = v3->lmm_stripe_count;
2663
2664                 if (lum->lmm_magic != LOV_USER_MAGIC_SPECIFIC)
2665                         __swab16s(&stripe_count);
2666
2667                 lustre_swab_lov_user_md_v3(v3);
2668                 lustre_swab_lov_user_md_objects(v3->lmm_objects, stripe_count);
2669                 break;
2670         }
2671         case __swab32(LOV_MAGIC_COMP_V1):
2672         case LOV_USER_MAGIC_COMP_V1:
2673                 lustre_swab_lov_comp_md_v1((struct lov_comp_md_v1 *)lum);
2674                 break;
2675         case __swab32(LOV_MAGIC_FOREIGN):
2676         case LOV_USER_MAGIC_FOREIGN:
2677         {
2678                 lfm = (struct lov_foreign_md *)lum;
2679                 __swab32s(&lfm->lfm_magic);
2680                 __swab32s(&lfm->lfm_length);
2681                 __swab32s(&lfm->lfm_type);
2682                 __swab32s(&lfm->lfm_flags);
2683                 break;
2684         }
2685         default:
2686                 CDEBUG(D_IOCTL, "Invalid LOV magic %08x\n", lum->lmm_magic);
2687         }
2688 }
2689 EXPORT_SYMBOL(lustre_swab_lov_user_md);
2690
2691 void lustre_swab_lov_mds_md(struct lov_mds_md *lmm)
2692 {
2693         ENTRY;
2694         CDEBUG(D_IOCTL, "swabbing lov_mds_md\n");
2695         __swab32s(&lmm->lmm_magic);
2696         __swab32s(&lmm->lmm_pattern);
2697         lustre_swab_lmm_oi(&lmm->lmm_oi);
2698         __swab32s(&lmm->lmm_stripe_size);
2699         __swab16s(&lmm->lmm_stripe_count);
2700         __swab16s(&lmm->lmm_layout_gen);
2701         EXIT;
2702 }
2703 EXPORT_SYMBOL(lustre_swab_lov_mds_md);
2704
2705 void lustre_swab_ldlm_res_id(struct ldlm_res_id *id)
2706 {
2707         int i;
2708
2709         for (i = 0; i < RES_NAME_SIZE; i++)
2710                 __swab64s(&id->name[i]);
2711 }
2712
2713 void lustre_swab_ldlm_policy_data(union ldlm_wire_policy_data *d)
2714 {
2715         /* the lock data is a union and the first two fields are always an
2716          * extent so it's ok to process an LDLM_EXTENT and LDLM_FLOCK lock
2717          * data the same way.
2718          */
2719         __swab64s(&d->l_extent.start);
2720         __swab64s(&d->l_extent.end);
2721         __swab64s(&d->l_extent.gid);
2722         __swab32s(&d->l_flock.lfw_padding);
2723         __swab32s(&d->l_flock.lfw_pid);
2724 }
2725
2726 void lustre_swab_ldlm_intent(struct ldlm_intent *i)
2727 {
2728         __swab64s(&i->opc);
2729 }
2730
2731 void lustre_swab_ldlm_resource_desc(struct ldlm_resource_desc *r)
2732 {
2733         __swab32s(&r->lr_type);
2734         BUILD_BUG_ON(offsetof(typeof(*r), lr_pad) == 0);
2735         lustre_swab_ldlm_res_id(&r->lr_name);
2736 }
2737
2738 void lustre_swab_ldlm_lock_desc(struct ldlm_lock_desc *l)
2739 {
2740         lustre_swab_ldlm_resource_desc(&l->l_resource);
2741         __swab32s(&l->l_req_mode);
2742         __swab32s(&l->l_granted_mode);
2743         lustre_swab_ldlm_policy_data(&l->l_policy_data);
2744 }
2745
2746 void lustre_swab_ldlm_request(struct ldlm_request *rq)
2747 {
2748         __swab32s(&rq->lock_flags);
2749         lustre_swab_ldlm_lock_desc(&rq->lock_desc);
2750         __swab32s(&rq->lock_count);
2751         /* lock_handle[] opaque */
2752 }
2753
2754 void lustre_swab_ldlm_reply(struct ldlm_reply *r)
2755 {
2756         __swab32s(&r->lock_flags);
2757         BUILD_BUG_ON(offsetof(typeof(*r), lock_padding) == 0);
2758         lustre_swab_ldlm_lock_desc(&r->lock_desc);
2759         /* lock_handle opaque */
2760         __swab64s(&r->lock_policy_res1);
2761         __swab64s(&r->lock_policy_res2);
2762 }
2763
2764 void lustre_swab_quota_body(struct quota_body *b)
2765 {
2766         lustre_swab_lu_fid(&b->qb_fid);
2767         lustre_swab_lu_fid((struct lu_fid *)&b->qb_id);
2768         __swab32s(&b->qb_flags);
2769         __swab64s(&b->qb_count);
2770         __swab64s(&b->qb_usage);
2771         __swab64s(&b->qb_slv_ver);
2772 }
2773
2774 /* Dump functions */
2775 void dump_ioo(struct obd_ioobj *ioo)
2776 {
2777         CDEBUG(D_RPCTRACE,
2778                "obd_ioobj: ioo_oid="DOSTID", ioo_max_brw=%#x, "
2779                "ioo_bufct=%d\n", POSTID(&ioo->ioo_oid), ioo->ioo_max_brw,
2780                ioo->ioo_bufcnt);
2781 }
2782
2783 void dump_rniobuf(struct niobuf_remote *nb)
2784 {
2785         CDEBUG(D_RPCTRACE, "niobuf_remote: offset=%llu, len=%d, flags=%x\n",
2786                nb->rnb_offset, nb->rnb_len, nb->rnb_flags);
2787 }
2788
2789 static void dump_obdo(struct obdo *oa)
2790 {
2791         u64 valid = oa->o_valid;
2792
2793         CDEBUG(D_RPCTRACE, "obdo: o_valid = %#llx\n", valid);
2794         if (valid & OBD_MD_FLID)
2795                 CDEBUG(D_RPCTRACE, "obdo: id = "DOSTID"\n", POSTID(&oa->o_oi));
2796         if (valid & OBD_MD_FLFID)
2797                 CDEBUG(D_RPCTRACE, "obdo: o_parent_seq = %#llx\n",
2798                        oa->o_parent_seq);
2799         if (valid & OBD_MD_FLSIZE)
2800                 CDEBUG(D_RPCTRACE, "obdo: o_size = %lld\n", oa->o_size);
2801         if (valid & OBD_MD_FLMTIME)
2802                 CDEBUG(D_RPCTRACE, "obdo: o_mtime = %lld\n", oa->o_mtime);
2803         if (valid & OBD_MD_FLATIME)
2804                 CDEBUG(D_RPCTRACE, "obdo: o_atime = %lld\n", oa->o_atime);
2805         if (valid & OBD_MD_FLCTIME)
2806                 CDEBUG(D_RPCTRACE, "obdo: o_ctime = %lld\n", oa->o_ctime);
2807         if (valid & OBD_MD_FLBLOCKS)   /* allocation of space */
2808                 CDEBUG(D_RPCTRACE, "obdo: o_blocks = %lld\n", oa->o_blocks);
2809         if (valid & OBD_MD_FLGRANT)
2810                 CDEBUG(D_RPCTRACE, "obdo: o_grant = %lld\n", oa->o_grant);
2811         if (valid & OBD_MD_FLBLKSZ)
2812                 CDEBUG(D_RPCTRACE, "obdo: o_blksize = %d\n", oa->o_blksize);
2813         if (valid & (OBD_MD_FLTYPE | OBD_MD_FLMODE))
2814                 CDEBUG(D_RPCTRACE, "obdo: o_mode = %o\n",
2815                        oa->o_mode & ((valid & OBD_MD_FLTYPE ?  S_IFMT : 0) |
2816                                      (valid & OBD_MD_FLMODE ? ~S_IFMT : 0)));
2817         if (valid & OBD_MD_FLUID)
2818                 CDEBUG(D_RPCTRACE, "obdo: o_uid = %u\n", oa->o_uid);
2819         if (valid & OBD_MD_FLUID)
2820                 CDEBUG(D_RPCTRACE, "obdo: o_uid_h = %u\n", oa->o_uid_h);
2821         if (valid & OBD_MD_FLGID)
2822                 CDEBUG(D_RPCTRACE, "obdo: o_gid = %u\n", oa->o_gid);
2823         if (valid & OBD_MD_FLGID)
2824                 CDEBUG(D_RPCTRACE, "obdo: o_gid_h = %u\n", oa->o_gid_h);
2825         if (valid & OBD_MD_FLFLAGS)
2826                 CDEBUG(D_RPCTRACE, "obdo: o_flags = %x\n", oa->o_flags);
2827         if (valid & OBD_MD_FLNLINK)
2828                 CDEBUG(D_RPCTRACE, "obdo: o_nlink = %u\n", oa->o_nlink);
2829         else if (valid & OBD_MD_FLCKSUM)
2830                 CDEBUG(D_RPCTRACE, "obdo: o_checksum (o_nlink) = %u\n",
2831                        oa->o_nlink);
2832         if (valid & OBD_MD_FLPARENT)
2833                 CDEBUG(D_RPCTRACE, "obdo: o_parent_oid = %x\n",
2834                        oa->o_parent_oid);
2835         if (valid & OBD_MD_FLFID) {
2836                 CDEBUG(D_RPCTRACE, "obdo: o_stripe_idx = %u\n",
2837                        oa->o_stripe_idx);
2838                 CDEBUG(D_RPCTRACE, "obdo: o_parent_ver = %x\n",
2839                        oa->o_parent_ver);
2840         }
2841         if (valid & OBD_MD_FLHANDLE)
2842                 CDEBUG(D_RPCTRACE, "obdo: o_handle = %lld\n",
2843                        oa->o_handle.cookie);
2844 }
2845
2846 void dump_ost_body(struct ost_body *ob)
2847 {
2848         dump_obdo(&ob->oa);
2849 }
2850
2851 void dump_rcs(__u32 *rc)
2852 {
2853         CDEBUG(D_RPCTRACE, "rmf_rcs: %d\n", *rc);
2854 }
2855
2856 static inline int req_ptlrpc_body_swabbed(struct ptlrpc_request *req)
2857 {
2858         LASSERT(req->rq_reqmsg);
2859
2860         switch (req->rq_reqmsg->lm_magic) {
2861         case LUSTRE_MSG_MAGIC_V2:
2862                 return req_capsule_req_swabbed(&req->rq_pill,
2863                                                MSG_PTLRPC_BODY_OFF);
2864         default:
2865                 CERROR("bad lustre msg magic: %#08X\n",
2866                        req->rq_reqmsg->lm_magic);
2867         }
2868         return 0;
2869 }
2870
2871 static inline int rep_ptlrpc_body_swabbed(struct ptlrpc_request *req)
2872 {
2873         if (unlikely(!req->rq_repmsg))
2874                 return 0;
2875
2876         switch (req->rq_repmsg->lm_magic) {
2877         case LUSTRE_MSG_MAGIC_V2:
2878                 return req_capsule_rep_swabbed(&req->rq_pill,
2879                                                MSG_PTLRPC_BODY_OFF);
2880         default:
2881                 /* uninitialized yet */
2882                 return 0;
2883         }
2884 }
2885
2886 void _debug_req(struct ptlrpc_request *req,
2887                 struct libcfs_debug_msg_data *msgdata, const char *fmt, ...)
2888 {
2889         bool req_ok = req->rq_reqmsg != NULL;
2890         bool rep_ok = false;
2891         struct lnet_nid *nid = NULL;
2892         struct va_format vaf;
2893         va_list args;
2894         int rep_flags = -1;
2895         int rep_status = -1;
2896         __u64 req_transno = 0;
2897         int req_opc = -1;
2898         __u32 req_flags =  (__u32) -1;
2899         __u32 req_uid = (__u32) -1;
2900         __u32 req_gid = (__u32) -1;
2901         char *req_jobid = NULL;
2902
2903         spin_lock(&req->rq_early_free_lock);
2904         if (req->rq_repmsg)
2905                 rep_ok = true;
2906
2907         if (req_capsule_req_need_swab(&req->rq_pill)) {
2908                 req_ok = req_ok && req_ptlrpc_body_swabbed(req);
2909                 rep_ok = rep_ok && rep_ptlrpc_body_swabbed(req);
2910         }
2911
2912         if (rep_ok) {
2913                 rep_flags = lustre_msg_get_flags(req->rq_repmsg);
2914                 rep_status = lustre_msg_get_status(req->rq_repmsg);
2915         }
2916         spin_unlock(&req->rq_early_free_lock);
2917
2918         if (req->rq_import && req->rq_import->imp_connection)
2919                 nid = &req->rq_import->imp_connection->c_peer.nid;
2920         else if (req->rq_export && req->rq_export->exp_connection)
2921                 nid = &req->rq_export->exp_connection->c_peer.nid;
2922
2923         if (req_ok) {
2924                 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
2925                 req_opc = lustre_msg_get_opc(req->rq_reqmsg);
2926                 req_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
2927                 lustre_msg_get_uid_gid(req->rq_reqmsg, &req_uid, &req_gid);
2928                 req_flags = lustre_msg_get_flags(req->rq_reqmsg);
2929         }
2930
2931         va_start(args, fmt);
2932         vaf.fmt = fmt;
2933         vaf.va = &args;
2934         libcfs_debug_msg(msgdata,
2935                          "%pV req@%p x%llu/t%lld(%llu) o%d->%s@%s:%d/%d lens %d/%d e %d to %lld dl %lld ref %d fl " REQ_FLAGS_FMT "/%x/%x rc %d/%d job:'%s' uid:%u gid:%u\n",
2936                          &vaf,
2937                          req, req->rq_xid, req->rq_transno, req_transno,
2938                          req_opc,
2939                          req->rq_import ?
2940                          req->rq_import->imp_obd->obd_name :
2941                          req->rq_export ?
2942                          req->rq_export->exp_client_uuid.uuid :
2943                          "<?>",
2944                          nid ? libcfs_nidstr(nid) : "<unknown>",
2945                          req->rq_request_portal, req->rq_reply_portal,
2946                          req->rq_reqlen, req->rq_replen,
2947                          req->rq_early_count, (s64)req->rq_timedout,
2948                          (s64)req->rq_deadline,
2949                          atomic_read(&req->rq_refcount),
2950                          DEBUG_REQ_FLAGS(req), req_flags, rep_flags,
2951                          req->rq_status, rep_status,
2952                          req_jobid ?: "", req_uid, req_gid);
2953         va_end(args);
2954 }
2955 EXPORT_SYMBOL(_debug_req);
2956
2957 void lustre_swab_hsm_user_state(struct hsm_user_state *state)
2958 {
2959         __swab32s(&state->hus_states);
2960         __swab32s(&state->hus_archive_id);
2961 }
2962
2963 void lustre_swab_hsm_state_set(struct hsm_state_set *hss)
2964 {
2965         __swab32s(&hss->hss_valid);
2966         __swab64s(&hss->hss_setmask);
2967         __swab64s(&hss->hss_clearmask);
2968         __swab32s(&hss->hss_archive_id);
2969 }
2970
2971 static void lustre_swab_hsm_extent(struct hsm_extent *extent)
2972 {
2973         __swab64s(&extent->offset);
2974         __swab64s(&extent->length);
2975 }
2976
2977 void lustre_swab_hsm_current_action(struct hsm_current_action *action)
2978 {
2979         __swab32s(&action->hca_state);
2980         __swab32s(&action->hca_action);
2981         lustre_swab_hsm_extent(&action->hca_location);
2982 }
2983
2984 void lustre_swab_hsm_user_item(struct hsm_user_item *hui)
2985 {
2986         lustre_swab_lu_fid(&hui->hui_fid);
2987         lustre_swab_hsm_extent(&hui->hui_extent);
2988 }
2989
2990 static void lustre_swab_lu_extent(struct lu_extent *le)
2991 {
2992         __swab64s(&le->e_start);
2993         __swab64s(&le->e_end);
2994 }
2995
2996 void lustre_swab_layout_intent(struct layout_intent *li)
2997 {
2998         __swab32s(&li->li_opc);
2999         __swab32s(&li->li_flags);
3000         lustre_swab_lu_extent(&li->li_extent);
3001 }
3002
3003 void lustre_swab_hsm_progress_kernel(struct hsm_progress_kernel *hpk)
3004 {
3005         lustre_swab_lu_fid(&hpk->hpk_fid);
3006         __swab64s(&hpk->hpk_cookie);
3007         __swab64s(&hpk->hpk_extent.offset);
3008         __swab64s(&hpk->hpk_extent.length);
3009         __swab16s(&hpk->hpk_flags);
3010         __swab16s(&hpk->hpk_errval);
3011 }
3012
3013 void lustre_swab_hsm_request(struct hsm_request *hr)
3014 {
3015         __swab32s(&hr->hr_action);
3016         __swab32s(&hr->hr_archive_id);
3017         __swab64s(&hr->hr_flags);
3018         __swab32s(&hr->hr_itemcount);
3019         __swab32s(&hr->hr_data_len);
3020 }
3021
3022 /* TODO: swab each sub request message */
3023 void lustre_swab_batch_update_request(struct batch_update_request *bur)
3024 {
3025         __swab32s(&bur->burq_magic);
3026         __swab16s(&bur->burq_count);
3027         __swab16s(&bur->burq_padding);
3028 }
3029
3030 /* TODO: swab each sub reply message. */
3031 void lustre_swab_batch_update_reply(struct batch_update_reply *bur)
3032 {
3033         __swab32s(&bur->burp_magic);
3034         __swab16s(&bur->burp_count);
3035         __swab16s(&bur->burp_padding);
3036 }
3037
3038 void lustre_swab_but_update_header(struct but_update_header *buh)
3039 {
3040         __swab32s(&buh->buh_magic);
3041         __swab32s(&buh->buh_count);
3042         __swab32s(&buh->buh_inline_length);
3043         __swab32s(&buh->buh_reply_size);
3044         __swab32s(&buh->buh_update_count);
3045 }
3046 EXPORT_SYMBOL(lustre_swab_but_update_header);
3047
3048 void lustre_swab_but_update_buffer(struct but_update_buffer *bub)
3049 {
3050         __swab32s(&bub->bub_size);
3051         __swab32s(&bub->bub_padding);
3052 }
3053 EXPORT_SYMBOL(lustre_swab_but_update_buffer);
3054
3055 void lustre_swab_swap_layouts(struct mdc_swap_layouts *msl)
3056 {
3057         __swab64s(&msl->msl_flags);
3058 }
3059
3060 void lustre_swab_close_data(struct close_data *cd)
3061 {
3062         lustre_swab_lu_fid(&cd->cd_fid);
3063         __swab64s(&cd->cd_data_version);
3064 }
3065
3066 void lustre_swab_close_data_resync_done(struct close_data_resync_done *resync)
3067 {
3068         int i;
3069
3070         __swab32s(&resync->resync_count);
3071         /* after swab, resync_count must in CPU endian */
3072         if (resync->resync_count <= INLINE_RESYNC_ARRAY_SIZE) {
3073                 for (i = 0; i < resync->resync_count; i++)
3074                         __swab32s(&resync->resync_ids_inline[i]);
3075         }
3076 }
3077 EXPORT_SYMBOL(lustre_swab_close_data_resync_done);
3078
3079 void lustre_swab_lfsck_request(struct lfsck_request *lr)
3080 {
3081         __swab32s(&lr->lr_event);
3082         __swab32s(&lr->lr_index);
3083         __swab32s(&lr->lr_flags);
3084         __swab32s(&lr->lr_valid);
3085         __swab32s(&lr->lr_speed);
3086         __swab16s(&lr->lr_version);
3087         __swab16s(&lr->lr_active);
3088         __swab16s(&lr->lr_param);
3089         __swab16s(&lr->lr_async_windows);
3090         __swab32s(&lr->lr_flags);
3091         lustre_swab_lu_fid(&lr->lr_fid);
3092         lustre_swab_lu_fid(&lr->lr_fid2);
3093         __swab32s(&lr->lr_comp_id);
3094         BUILD_BUG_ON(offsetof(typeof(*lr), lr_padding_0) == 0);
3095         BUILD_BUG_ON(offsetof(typeof(*lr), lr_padding_1) == 0);
3096         BUILD_BUG_ON(offsetof(typeof(*lr), lr_padding_2) == 0);
3097         BUILD_BUG_ON(offsetof(typeof(*lr), lr_padding_3) == 0);
3098 }
3099
3100 void lustre_swab_lfsck_reply(struct lfsck_reply *lr)
3101 {
3102         __swab32s(&lr->lr_status);
3103         BUILD_BUG_ON(offsetof(typeof(*lr), lr_padding_1) == 0);
3104         __swab64s(&lr->lr_repaired);
3105 }
3106
3107 static void lustre_swab_orphan_rec(struct lu_orphan_rec *rec)
3108 {
3109         lustre_swab_lu_fid(&rec->lor_fid);
3110         __swab32s(&rec->lor_uid);
3111         __swab32s(&rec->lor_gid);
3112 }
3113
3114 void lustre_swab_orphan_ent(struct lu_orphan_ent *ent)
3115 {
3116         lustre_swab_lu_fid(&ent->loe_key);
3117         lustre_swab_orphan_rec(&ent->loe_rec);
3118 }
3119 EXPORT_SYMBOL(lustre_swab_orphan_ent);
3120
3121 void lustre_swab_orphan_ent_v2(struct lu_orphan_ent_v2 *ent)
3122 {
3123         lustre_swab_lu_fid(&ent->loe_key);
3124         lustre_swab_orphan_rec(&ent->loe_rec.lor_rec);
3125         lustre_swab_ost_layout(&ent->loe_rec.lor_layout);
3126         BUILD_BUG_ON(offsetof(typeof(ent->loe_rec), lor_padding) == 0);
3127 }
3128 EXPORT_SYMBOL(lustre_swab_orphan_ent_v2);
3129
3130 void lustre_swab_orphan_ent_v3(struct lu_orphan_ent_v3 *ent)
3131 {
3132         lustre_swab_lu_fid(&ent->loe_key);
3133         lustre_swab_orphan_rec(&ent->loe_rec.lor_rec);
3134         lustre_swab_ost_layout(&ent->loe_rec.lor_layout);
3135         __swab32s(&ent->loe_rec.lor_layout_version);
3136         __swab32s(&ent->loe_rec.lor_range);
3137         BUILD_BUG_ON(offsetof(typeof(ent->loe_rec), lor_padding_1) == 0);
3138         BUILD_BUG_ON(offsetof(typeof(ent->loe_rec), lor_padding_2) == 0);
3139 }
3140 EXPORT_SYMBOL(lustre_swab_orphan_ent_v3);
3141
3142 void lustre_swab_ladvise(struct lu_ladvise *ladvise)
3143 {
3144         __swab16s(&ladvise->lla_advice);
3145         __swab16s(&ladvise->lla_value1);
3146         __swab32s(&ladvise->lla_value2);
3147         __swab64s(&ladvise->lla_start);
3148         __swab64s(&ladvise->lla_end);
3149         __swab32s(&ladvise->lla_value3);
3150         __swab32s(&ladvise->lla_value4);
3151 }
3152 EXPORT_SYMBOL(lustre_swab_ladvise);
3153
3154 void lustre_swab_ladvise_hdr(struct ladvise_hdr *ladvise_hdr)
3155 {
3156         __swab32s(&ladvise_hdr->lah_magic);
3157         __swab32s(&ladvise_hdr->lah_count);
3158         __swab64s(&ladvise_hdr->lah_flags);
3159         __swab32s(&ladvise_hdr->lah_value1);
3160         __swab32s(&ladvise_hdr->lah_value2);
3161         __swab64s(&ladvise_hdr->lah_value3);
3162 }
3163 EXPORT_SYMBOL(lustre_swab_ladvise_hdr);