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, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/ptlrpc/pack_generic.c
  33  *
  34  * (Un)packing of OST requests
  35  *
  36  * Author: Peter J. Braam <braam@clusterfs.com>
  37  * Author: Phil Schwan <phil@clusterfs.com>
  38  * Author: Eric Barton <eeb@clusterfs.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_RPC
  42
  43 #include <libcfs/libcfs.h>
  44
  45 #include <llog_swab.h>
  46 #include <lustre_net.h>
  47 #include <lustre_swab.h>
  48 #include <obd_cksum.h>
  49 #include <obd_class.h>
  50 #include <obd_support.h>
  51 #include <obj_update.h>
  52
  53 #include "ptlrpc_internal.h"
  54
  55 static inline __u32 lustre_msg_hdr_size_v2(__u32 count)
  56 {
  57         return cfs_size_round(offsetof(struct lustre_msg_v2,
  58                                        lm_buflens[count]));
  59 }
  60
  61 __u32 lustre_msg_hdr_size(__u32 magic, __u32 count)
  62 {
  63         switch (magic) {
  64         case LUSTRE_MSG_MAGIC_V2:
  65                 return lustre_msg_hdr_size_v2(count);
  66         default:
  67                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
  68                 return 0;
  69         }
  70 }
  71
  72 void ptlrpc_buf_set_swabbed(struct ptlrpc_request *req, const int inout,
  73                             __u32 index)
  74 {
  75         if (inout)
  76                 lustre_set_req_swabbed(req, index);
  77         else
  78                 lustre_set_rep_swabbed(req, index);
  79 }
  80
  81 int ptlrpc_buf_need_swab(struct ptlrpc_request *req, const int inout,
  82                          __u32 index)
  83 {
  84         if (inout)
  85                 return (ptlrpc_req_need_swab(req) &&
  86                         !lustre_req_swabbed(req, index));
  87         else
  88                 return (ptlrpc_rep_need_swab(req) &&
  89                         !lustre_rep_swabbed(req, index));
  90 }
  91
  92 static inline int lustre_msg_check_version_v2(struct lustre_msg_v2 *msg,
  93                                                 __u32 version)
  94 {
  95         __u32 ver = lustre_msg_get_version(msg);
  96         return (ver & LUSTRE_VERSION_MASK) != version;
  97 }
  98
  99 int lustre_msg_check_version(struct lustre_msg *msg, __u32 version)
 100 {
 101 #define LUSTRE_MSG_MAGIC_V1 0x0BD00BD0
 102         switch (msg->lm_magic) {
 103         case LUSTRE_MSG_MAGIC_V1:
 104                 CERROR("msg v1 not supported - please upgrade you system\n");
 105                 return -EINVAL;
 106         case LUSTRE_MSG_MAGIC_V2:
 107                 return lustre_msg_check_version_v2(msg, version);
 108         default:
 109                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 110                 return -EPROTO;
 111         }
 112 #undef LUSTRE_MSG_MAGIC_V1
 113 }
 114
 115 /* early reply size */
 116 __u32 lustre_msg_early_size()
 117 {
 118         static __u32 size;
 119         if (!size) {
 120                 /* Always reply old ptlrpc_body_v2 to keep interoprability
 121                  * with the old client (< 2.3) which doesn't have pb_jobid
 122                  * in the ptlrpc_body.
 123                  *
 124                  * XXX Remove this whenever we dorp interoprability with such
 125                  *     client.
 126                  */
 127                 __u32 pblen = sizeof(struct ptlrpc_body_v2);
 128                 size = lustre_msg_size(LUSTRE_MSG_MAGIC_V2, 1, &pblen);
 129         }
 130         return size;
 131 }
 132 EXPORT_SYMBOL(lustre_msg_early_size);
 133
 134 __u32 lustre_msg_size_v2(int count, __u32 *lengths)
 135 {
 136         __u32 size;
 137         int i;
 138
 139         size = lustre_msg_hdr_size_v2(count);
 140         for (i = 0; i < count; i++)
 141                 size += cfs_size_round(lengths[i]);
 142
 143         return size;
 144 }
 145 EXPORT_SYMBOL(lustre_msg_size_v2);
 146
 147 /* This returns the size of the buffer that is required to hold a lustre_msg
 148  * with the given sub-buffer lengths.
 149  * NOTE: this should only be used for NEW requests, and should always be
 150  *       in the form of a v2 request.  If this is a connection to a v1
 151  *       target then the first buffer will be stripped because the ptlrpc
 152  *       data is part of the lustre_msg_v1 header. b=14043 */
 153 __u32 lustre_msg_size(__u32 magic, int count, __u32 *lens)
 154 {
 155         __u32 size[] = { sizeof(struct ptlrpc_body) };
 156
 157         if (!lens) {
 158                 LASSERT(count == 1);
 159                 lens = size;
 160         }
 161
 162         LASSERT(count > 0);
 163         LASSERT(lens[MSG_PTLRPC_BODY_OFF] >= sizeof(struct ptlrpc_body_v2));
 164
 165         switch (magic) {
 166         case LUSTRE_MSG_MAGIC_V2:
 167                 return lustre_msg_size_v2(count, lens);
 168         default:
 169                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
 170                 return 0;
 171         }
 172 }
 173
 174 /* This is used to determine the size of a buffer that was already packed
 175  * and will correctly handle the different message formats. */
 176 __u32 lustre_packed_msg_size(struct lustre_msg *msg)
 177 {
 178         switch (msg->lm_magic) {
 179         case LUSTRE_MSG_MAGIC_V2:
 180                 return lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
 181         default:
 182                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 183                 return 0;
 184         }
 185 }
 186
 187 void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
 188                         char **bufs)
 189 {
 190         char *ptr;
 191         int i;
 192
 193         msg->lm_bufcount = count;
 194         /* XXX: lm_secflvr uninitialized here */
 195         msg->lm_magic = LUSTRE_MSG_MAGIC_V2;
 196
 197         for (i = 0; i < count; i++)
 198                 msg->lm_buflens[i] = lens[i];
 199
 200         if (bufs == NULL)
 201                 return;
 202
 203         ptr = (char *)msg + lustre_msg_hdr_size_v2(count);
 204         for (i = 0; i < count; i++) {
 205                 char *tmp = bufs[i];
 206
 207                 if (tmp)
 208                         memcpy(ptr, tmp, lens[i]);
 209                 ptr += cfs_size_round(lens[i]);
 210         }
 211 }
 212 EXPORT_SYMBOL(lustre_init_msg_v2);
 213
 214 static int lustre_pack_request_v2(struct ptlrpc_request *req,
 215                                   int count, __u32 *lens, char **bufs)
 216 {
 217         int reqlen, rc;
 218
 219         reqlen = lustre_msg_size_v2(count, lens);
 220
 221         rc = sptlrpc_cli_alloc_reqbuf(req, reqlen);
 222         if (rc)
 223                 return rc;
 224
 225         req->rq_reqlen = reqlen;
 226
 227         lustre_init_msg_v2(req->rq_reqmsg, count, lens, bufs);
 228         lustre_msg_add_version(req->rq_reqmsg, PTLRPC_MSG_VERSION);
 229         return 0;
 230 }
 231
 232 int lustre_pack_request(struct ptlrpc_request *req, __u32 magic, int count,
 233                         __u32 *lens, char **bufs)
 234 {
 235         __u32 size[] = { sizeof(struct ptlrpc_body) };
 236
 237         if (!lens) {
 238                 LASSERT(count == 1);
 239                 lens = size;
 240         }
 241
 242         LASSERT(count > 0);
 243         LASSERT(lens[MSG_PTLRPC_BODY_OFF] == sizeof(struct ptlrpc_body));
 244
 245         /* only use new format, we don't need to be compatible with 1.4 */
 246         magic = LUSTRE_MSG_MAGIC_V2;
 247
 248         switch (magic) {
 249         case LUSTRE_MSG_MAGIC_V2:
 250                 return lustre_pack_request_v2(req, count, lens, bufs);
 251         default:
 252                 LASSERTF(0, "incorrect message magic: %08x\n", magic);
 253                 return -EINVAL;
 254         }
 255 }
 256
 257 #if RS_DEBUG
 258 struct list_head ptlrpc_rs_debug_lru =
 259         LIST_HEAD_INIT(ptlrpc_rs_debug_lru);
 260 spinlock_t ptlrpc_rs_debug_lock;
 261
 262 #define PTLRPC_RS_DEBUG_LRU_ADD(rs)                                     \
 263 do {                                                                    \
 264         spin_lock(&ptlrpc_rs_debug_lock);                               \
 265         list_add_tail(&(rs)->rs_debug_list, &ptlrpc_rs_debug_lru);      \
 266         spin_unlock(&ptlrpc_rs_debug_lock);                             \
 267 } while (0)
 268
 269 #define PTLRPC_RS_DEBUG_LRU_DEL(rs)                                     \
 270 do {                                                                    \
 271         spin_lock(&ptlrpc_rs_debug_lock);                               \
 272         list_del(&(rs)->rs_debug_list);                         \
 273         spin_unlock(&ptlrpc_rs_debug_lock);                             \
 274 } while (0)
 275 #else
 276 # define PTLRPC_RS_DEBUG_LRU_ADD(rs) do {} while(0)
 277 # define PTLRPC_RS_DEBUG_LRU_DEL(rs) do {} while(0)
 278 #endif
 279
 280 struct ptlrpc_reply_state *
 281 lustre_get_emerg_rs(struct ptlrpc_service_part *svcpt)
 282 {
 283         struct ptlrpc_reply_state *rs = NULL;
 284
 285         spin_lock(&svcpt->scp_rep_lock);
 286
 287         /* See if we have anything in a pool, and wait if nothing */
 288         while (list_empty(&svcpt->scp_rep_idle)) {
 289                 struct l_wait_info      lwi;
 290                 int                     rc;
 291
 292                 spin_unlock(&svcpt->scp_rep_lock);
 293                 /* If we cannot get anything for some long time, we better
 294                  * bail out instead of waiting infinitely */
 295                 lwi = LWI_TIMEOUT(cfs_time_seconds(10), NULL, NULL);
 296                 rc = l_wait_event(svcpt->scp_rep_waitq,
 297                                   !list_empty(&svcpt->scp_rep_idle), &lwi);
 298                 if (rc != 0)
 299                         goto out;
 300                 spin_lock(&svcpt->scp_rep_lock);
 301         }
 302
 303         rs = list_entry(svcpt->scp_rep_idle.next,
 304                             struct ptlrpc_reply_state, rs_list);
 305         list_del(&rs->rs_list);
 306
 307         spin_unlock(&svcpt->scp_rep_lock);
 308
 309         memset(rs, 0, svcpt->scp_service->srv_max_reply_size);
 310         rs->rs_size = svcpt->scp_service->srv_max_reply_size;
 311         rs->rs_svcpt = svcpt;
 312         rs->rs_prealloc = 1;
 313 out:
 314         return rs;
 315 }
 316
 317 void lustre_put_emerg_rs(struct ptlrpc_reply_state *rs)
 318 {
 319         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 320
 321         spin_lock(&svcpt->scp_rep_lock);
 322         list_add(&rs->rs_list, &svcpt->scp_rep_idle);
 323         spin_unlock(&svcpt->scp_rep_lock);
 324         wake_up(&svcpt->scp_rep_waitq);
 325 }
 326
 327 int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
 328                          __u32 *lens, char **bufs, int flags)
 329 {
 330         struct ptlrpc_reply_state *rs;
 331         int                        msg_len, rc;
 332         ENTRY;
 333
 334         LASSERT(req->rq_reply_state == NULL);
 335
 336         if ((flags & LPRFL_EARLY_REPLY) == 0) {
 337                 spin_lock(&req->rq_lock);
 338                 req->rq_packed_final = 1;
 339                 spin_unlock(&req->rq_lock);
 340         }
 341
 342         msg_len = lustre_msg_size_v2(count, lens);
 343         rc = sptlrpc_svc_alloc_rs(req, msg_len);
 344         if (rc)
 345                 RETURN(rc);
 346
 347         rs = req->rq_reply_state;
 348         atomic_set(&rs->rs_refcount, 1);        /* 1 ref for rq_reply_state */
 349         rs->rs_cb_id.cbid_fn = reply_out_callback;
 350         rs->rs_cb_id.cbid_arg = rs;
 351         rs->rs_svcpt = req->rq_rqbd->rqbd_svcpt;
 352         INIT_LIST_HEAD(&rs->rs_exp_list);
 353         INIT_LIST_HEAD(&rs->rs_obd_list);
 354         INIT_LIST_HEAD(&rs->rs_list);
 355         spin_lock_init(&rs->rs_lock);
 356
 357         req->rq_replen = msg_len;
 358         req->rq_reply_state = rs;
 359         req->rq_repmsg = rs->rs_msg;
 360
 361         lustre_init_msg_v2(rs->rs_msg, count, lens, bufs);
 362         lustre_msg_add_version(rs->rs_msg, PTLRPC_MSG_VERSION);
 363
 364         PTLRPC_RS_DEBUG_LRU_ADD(rs);
 365
 366         RETURN(0);
 367 }
 368 EXPORT_SYMBOL(lustre_pack_reply_v2);
 369
 370 int lustre_pack_reply_flags(struct ptlrpc_request *req, int count, __u32 *lens,
 371                             char **bufs, int flags)
 372 {
 373         int rc = 0;
 374         __u32 size[] = { sizeof(struct ptlrpc_body) };
 375
 376         if (!lens) {
 377                 LASSERT(count == 1);
 378                 lens = size;
 379         }
 380
 381         LASSERT(count > 0);
 382         LASSERT(lens[MSG_PTLRPC_BODY_OFF] == sizeof(struct ptlrpc_body));
 383
 384         switch (req->rq_reqmsg->lm_magic) {
 385         case LUSTRE_MSG_MAGIC_V2:
 386                 rc = lustre_pack_reply_v2(req, count, lens, bufs, flags);
 387                 break;
 388         default:
 389                 LASSERTF(0, "incorrect message magic: %08x\n",
 390                          req->rq_reqmsg->lm_magic);
 391                 rc = -EINVAL;
 392         }
 393         if (rc != 0)
 394                 CERROR("lustre_pack_reply failed: rc=%d size=%d\n", rc,
 395                        lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens));
 396         return rc;
 397 }
 398
 399 int lustre_pack_reply(struct ptlrpc_request *req, int count, __u32 *lens,
 400                       char **bufs)
 401 {
 402         return lustre_pack_reply_flags(req, count, lens, bufs, 0);
 403 }
 404 EXPORT_SYMBOL(lustre_pack_reply);
 405
 406 void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, __u32 n, __u32 min_size)
 407 {
 408         __u32 i, offset, buflen, bufcount;
 409
 410         LASSERT(m != NULL);
 411
 412         bufcount = m->lm_bufcount;
 413         if (unlikely(n >= bufcount)) {
 414                 CDEBUG(D_INFO, "msg %p buffer[%d] not present (count %d)\n",
 415                        m, n, bufcount);
 416                 return NULL;
 417         }
 418
 419         buflen = m->lm_buflens[n];
 420         if (unlikely(buflen < min_size)) {
 421                 CERROR("msg %p buffer[%d] size %d too small "
 422                        "(required %d, opc=%d)\n", m, n, buflen, min_size,
 423                        n == MSG_PTLRPC_BODY_OFF ? -1 : lustre_msg_get_opc(m));
 424                 return NULL;
 425         }
 426
 427         offset = lustre_msg_hdr_size_v2(bufcount);
 428         for (i = 0; i < n; i++)
 429                 offset += cfs_size_round(m->lm_buflens[i]);
 430
 431         return (char *)m + offset;
 432 }
 433
 434 void *lustre_msg_buf(struct lustre_msg *m, __u32 n, __u32 min_size)
 435 {
 436         switch (m->lm_magic) {
 437         case LUSTRE_MSG_MAGIC_V2:
 438                 return lustre_msg_buf_v2(m, n, min_size);
 439         default:
 440                 LASSERTF(0, "incorrect message magic: %08x (msg:%p)\n",
 441                          m->lm_magic, m);
 442                 return NULL;
 443         }
 444 }
 445 EXPORT_SYMBOL(lustre_msg_buf);
 446
 447 static int lustre_shrink_msg_v2(struct lustre_msg_v2 *msg, __u32 segment,
 448                                 unsigned int newlen, int move_data)
 449 {
 450         char   *tail = NULL, *newpos;
 451         int     tail_len = 0, n;
 452
 453         LASSERT(msg);
 454         LASSERT(msg->lm_bufcount > segment);
 455         LASSERT(msg->lm_buflens[segment] >= newlen);
 456
 457         if (msg->lm_buflens[segment] == newlen)
 458                 goto out;
 459
 460         if (move_data && msg->lm_bufcount > segment + 1) {
 461                 tail = lustre_msg_buf_v2(msg, segment + 1, 0);
 462                 for (n = segment + 1; n < msg->lm_bufcount; n++)
 463                         tail_len += cfs_size_round(msg->lm_buflens[n]);
 464         }
 465
 466         msg->lm_buflens[segment] = newlen;
 467
 468         if (tail && tail_len) {
 469                 newpos = lustre_msg_buf_v2(msg, segment + 1, 0);
 470                 LASSERT(newpos <= tail);
 471                 if (newpos != tail)
 472                         memmove(newpos, tail, tail_len);
 473         }
 474 out:
 475         return lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
 476 }
 477
 478 /*
 479  * for @msg, shrink @segment to size @newlen. if @move_data is non-zero,
 480  * we also move data forward from @segment + 1.
 481  *
 482  * if @newlen == 0, we remove the segment completely, but we still keep the
 483  * totally bufcount the same to save possible data moving. this will leave a
 484  * unused segment with size 0 at the tail, but that's ok.
 485  *
 486  * return new msg size after shrinking.
 487  *
 488  * CAUTION:
 489  * + if any buffers higher than @segment has been filled in, must call shrink
 490  *   with non-zero @move_data.
 491  * + caller should NOT keep pointers to msg buffers which higher than @segment
 492  *   after call shrink.
 493  */
 494 int lustre_shrink_msg(struct lustre_msg *msg, int segment,
 495                       unsigned int newlen, int move_data)
 496 {
 497         switch (msg->lm_magic) {
 498         case LUSTRE_MSG_MAGIC_V2:
 499                 return lustre_shrink_msg_v2(msg, segment, newlen, move_data);
 500         default:
 501                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 502         }
 503 }
 504 EXPORT_SYMBOL(lustre_shrink_msg);
 505
 506 void lustre_free_reply_state(struct ptlrpc_reply_state *rs)
 507 {
 508         PTLRPC_RS_DEBUG_LRU_DEL(rs);
 509
 510         LASSERT(atomic_read(&rs->rs_refcount) == 0);
 511         LASSERT(!rs->rs_difficult || rs->rs_handled);
 512         LASSERT(!rs->rs_on_net);
 513         LASSERT(!rs->rs_scheduled);
 514         LASSERT(rs->rs_export == NULL);
 515         LASSERT(rs->rs_nlocks == 0);
 516         LASSERT(list_empty(&rs->rs_exp_list));
 517         LASSERT(list_empty(&rs->rs_obd_list));
 518
 519         sptlrpc_svc_free_rs(rs);
 520 }
 521
 522 static int lustre_unpack_msg_v2(struct lustre_msg_v2 *m, int len)
 523 {
 524         int swabbed, required_len, i;
 525
 526         /* Now we know the sender speaks my language. */
 527         required_len = lustre_msg_hdr_size_v2(0);
 528         if (len < required_len) {
 529                 /* can't even look inside the message */
 530                 CERROR("message length %d too small for lustre_msg\n", len);
 531                 return -EINVAL;
 532         }
 533
 534         swabbed = (m->lm_magic == LUSTRE_MSG_MAGIC_V2_SWABBED);
 535
 536         if (swabbed) {
 537                 __swab32s(&m->lm_magic);
 538                 __swab32s(&m->lm_bufcount);
 539                 __swab32s(&m->lm_secflvr);
 540                 __swab32s(&m->lm_repsize);
 541                 __swab32s(&m->lm_cksum);
 542                 __swab32s(&m->lm_flags);
 543                 CLASSERT(offsetof(typeof(*m), lm_padding_2) != 0);
 544                 CLASSERT(offsetof(typeof(*m), lm_padding_3) != 0);
 545         }
 546
 547         required_len = lustre_msg_hdr_size_v2(m->lm_bufcount);
 548         if (len < required_len) {
 549                 /* didn't receive all the buffer lengths */
 550                 CERROR ("message length %d too small for %d buflens\n",
 551                         len, m->lm_bufcount);
 552                 return -EINVAL;
 553         }
 554
 555         for (i = 0; i < m->lm_bufcount; i++) {
 556                 if (swabbed)
 557                         __swab32s(&m->lm_buflens[i]);
 558                 required_len += cfs_size_round(m->lm_buflens[i]);
 559         }
 560
 561         if (len < required_len) {
 562                 CERROR("len: %d, required_len %d\n", len, required_len);
 563                 CERROR("bufcount: %d\n", m->lm_bufcount);
 564                 for (i = 0; i < m->lm_bufcount; i++)
 565                         CERROR("buffer %d length %d\n", i, m->lm_buflens[i]);
 566                 return -EINVAL;
 567         }
 568
 569         return swabbed;
 570 }
 571
 572 int __lustre_unpack_msg(struct lustre_msg *m, int len)
 573 {
 574         int required_len, rc;
 575         ENTRY;
 576
 577         /* We can provide a slightly better error log, if we check the
 578          * message magic and version first.  In the future, struct
 579          * lustre_msg may grow, and we'd like to log a version mismatch,
 580          * rather than a short message.
 581          *
 582          */
 583         required_len = offsetof(struct lustre_msg, lm_magic) +
 584                        sizeof(m->lm_magic);
 585         if (len < required_len) {
 586                 /* can't even look inside the message */
 587                 CERROR("message length %d too small for magic/version check\n",
 588                        len);
 589                 RETURN(-EINVAL);
 590         }
 591
 592         rc = lustre_unpack_msg_v2(m, len);
 593
 594         RETURN(rc);
 595 }
 596 EXPORT_SYMBOL(__lustre_unpack_msg);
 597
 598 int ptlrpc_unpack_req_msg(struct ptlrpc_request *req, int len)
 599 {
 600         int rc;
 601         rc = __lustre_unpack_msg(req->rq_reqmsg, len);
 602         if (rc == 1) {
 603                 lustre_set_req_swabbed(req, MSG_PTLRPC_HEADER_OFF);
 604                 rc = 0;
 605         }
 606         return rc;
 607 }
 608
 609 int ptlrpc_unpack_rep_msg(struct ptlrpc_request *req, int len)
 610 {
 611         int rc;
 612         rc = __lustre_unpack_msg(req->rq_repmsg, len);
 613         if (rc == 1) {
 614                 lustre_set_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF);
 615                 rc = 0;
 616         }
 617         return rc;
 618 }
 619
 620 static inline int lustre_unpack_ptlrpc_body_v2(struct ptlrpc_request *req,
 621                                                const int inout, int offset)
 622 {
 623         struct ptlrpc_body *pb;
 624         struct lustre_msg_v2 *m = inout ? req->rq_reqmsg : req->rq_repmsg;
 625
 626         pb = lustre_msg_buf_v2(m, offset, sizeof(struct ptlrpc_body_v2));
 627         if (!pb) {
 628                 CERROR("error unpacking ptlrpc body\n");
 629                 return -EFAULT;
 630         }
 631         if (ptlrpc_buf_need_swab(req, inout, offset)) {
 632                 lustre_swab_ptlrpc_body(pb);
 633                 ptlrpc_buf_set_swabbed(req, inout, offset);
 634         }
 635
 636         if ((pb->pb_version & ~LUSTRE_VERSION_MASK) != PTLRPC_MSG_VERSION) {
 637                  CERROR("wrong lustre_msg version %08x\n", pb->pb_version);
 638                  return -EINVAL;
 639         }
 640
 641         if (!inout)
 642                 pb->pb_status = ptlrpc_status_ntoh(pb->pb_status);
 643
 644         return 0;
 645 }
 646
 647 int lustre_unpack_req_ptlrpc_body(struct ptlrpc_request *req, int offset)
 648 {
 649         switch (req->rq_reqmsg->lm_magic) {
 650         case LUSTRE_MSG_MAGIC_V2:
 651                 return lustre_unpack_ptlrpc_body_v2(req, 1, offset);
 652         default:
 653                 CERROR("bad lustre msg magic: %08x\n",
 654                        req->rq_reqmsg->lm_magic);
 655                 return -EINVAL;
 656         }
 657 }
 658
 659 int lustre_unpack_rep_ptlrpc_body(struct ptlrpc_request *req, int offset)
 660 {
 661         switch (req->rq_repmsg->lm_magic) {
 662         case LUSTRE_MSG_MAGIC_V2:
 663                 return lustre_unpack_ptlrpc_body_v2(req, 0, offset);
 664         default:
 665                 CERROR("bad lustre msg magic: %08x\n",
 666                        req->rq_repmsg->lm_magic);
 667                 return -EINVAL;
 668         }
 669 }
 670
 671 static inline __u32 lustre_msg_buflen_v2(struct lustre_msg_v2 *m, __u32 n)
 672 {
 673         if (n >= m->lm_bufcount)
 674                 return 0;
 675
 676         return m->lm_buflens[n];
 677 }
 678
 679 /**
 680  * lustre_msg_buflen - return the length of buffer \a n in message \a m
 681  * \param m lustre_msg (request or reply) to look at
 682  * \param n message index (base 0)
 683  *
 684  * returns zero for non-existent message indices
 685  */
 686 __u32 lustre_msg_buflen(struct lustre_msg *m, __u32 n)
 687 {
 688         switch (m->lm_magic) {
 689         case LUSTRE_MSG_MAGIC_V2:
 690                 return lustre_msg_buflen_v2(m, n);
 691         default:
 692                 CERROR("incorrect message magic: %08x\n", m->lm_magic);
 693                 return 0;
 694         }
 695 }
 696 EXPORT_SYMBOL(lustre_msg_buflen);
 697
 698 static inline void
 699 lustre_msg_set_buflen_v2(struct lustre_msg_v2 *m, __u32 n, __u32 len)
 700 {
 701         if (n >= m->lm_bufcount)
 702                 LBUG();
 703
 704         m->lm_buflens[n] = len;
 705 }
 706
 707 void lustre_msg_set_buflen(struct lustre_msg *m, __u32 n, __u32 len)
 708 {
 709         switch (m->lm_magic) {
 710         case LUSTRE_MSG_MAGIC_V2:
 711                 lustre_msg_set_buflen_v2(m, n, len);
 712                 return;
 713         default:
 714                 LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 715         }
 716 }
 717
 718 /* NB return the bufcount for lustre_msg_v2 format, so if message is packed
 719  * in V1 format, the result is one bigger. (add struct ptlrpc_body). */
 720 __u32 lustre_msg_bufcount(struct lustre_msg *m)
 721 {
 722         switch (m->lm_magic) {
 723         case LUSTRE_MSG_MAGIC_V2:
 724                 return m->lm_bufcount;
 725         default:
 726                 CERROR("incorrect message magic: %08x\n", m->lm_magic);
 727                 return 0;
 728         }
 729 }
 730
 731 char *lustre_msg_string(struct lustre_msg *m, __u32 index, __u32 max_len)
 732 {
 733         /* max_len == 0 means the string should fill the buffer */
 734         char *str;
 735         __u32 slen, blen;
 736
 737         switch (m->lm_magic) {
 738         case LUSTRE_MSG_MAGIC_V2:
 739                 str = lustre_msg_buf_v2(m, index, 0);
 740                 blen = lustre_msg_buflen_v2(m, index);
 741                 break;
 742         default:
 743                 LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 744         }
 745
 746         if (str == NULL) {
 747                 CERROR ("can't unpack string in msg %p buffer[%d]\n", m, index);
 748                 return NULL;
 749         }
 750
 751         slen = strnlen(str, blen);
 752
 753         if (slen == blen) {                     /* not NULL terminated */
 754                 CERROR("can't unpack non-NULL terminated string in "
 755                         "msg %p buffer[%d] len %d\n", m, index, blen);
 756                 return NULL;
 757         }
 758
 759         if (max_len == 0) {
 760                 if (slen != blen - 1) {
 761                         CERROR("can't unpack short string in msg %p "
 762                                "buffer[%d] len %d: strlen %d\n",
 763                                m, index, blen, slen);
 764                         return NULL;
 765                 }
 766         } else if (slen > max_len) {
 767                 CERROR("can't unpack oversized string in msg %p "
 768                        "buffer[%d] len %d strlen %d: max %d expected\n",
 769                        m, index, blen, slen, max_len);
 770                 return NULL;
 771         }
 772
 773         return str;
 774 }
 775
 776 /* Wrap up the normal fixed length cases */
 777 static inline void *__lustre_swab_buf(struct lustre_msg *msg, __u32 index,
 778                                       __u32 min_size, void *swabber)
 779 {
 780         void *ptr = NULL;
 781
 782         LASSERT(msg != NULL);
 783         switch (msg->lm_magic) {
 784         case LUSTRE_MSG_MAGIC_V2:
 785                 ptr = lustre_msg_buf_v2(msg, index, min_size);
 786                 break;
 787         default:
 788                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 789         }
 790
 791         if (ptr != NULL && swabber != NULL)
 792                 ((void (*)(void *))swabber)(ptr);
 793
 794         return ptr;
 795 }
 796
 797 static inline struct ptlrpc_body *lustre_msg_ptlrpc_body(struct lustre_msg *msg)
 798 {
 799         return lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
 800                                  sizeof(struct ptlrpc_body_v2));
 801 }
 802
 803 __u32 lustre_msghdr_get_flags(struct lustre_msg *msg)
 804 {
 805         switch (msg->lm_magic) {
 806         case LUSTRE_MSG_MAGIC_V2:
 807                 /* already in host endian */
 808                 return msg->lm_flags;
 809         default:
 810                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 811                 return 0;
 812         }
 813 }
 814 EXPORT_SYMBOL(lustre_msghdr_get_flags);
 815
 816 void lustre_msghdr_set_flags(struct lustre_msg *msg, __u32 flags)
 817 {
 818         switch (msg->lm_magic) {
 819         case LUSTRE_MSG_MAGIC_V2:
 820                 msg->lm_flags = flags;
 821                 return;
 822         default:
 823                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 824         }
 825 }
 826
 827 __u32 lustre_msg_get_flags(struct lustre_msg *msg)
 828 {
 829         switch (msg->lm_magic) {
 830         case LUSTRE_MSG_MAGIC_V2: {
 831                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 832                 if (pb != NULL)
 833                         return pb->pb_flags;
 834
 835                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 836         }
 837         /* no break */
 838         default:
 839                 /* flags might be printed in debug code while message
 840                  * uninitialized */
 841                 return 0;
 842         }
 843 }
 844 EXPORT_SYMBOL(lustre_msg_get_flags);
 845
 846 void lustre_msg_add_flags(struct lustre_msg *msg, __u32 flags)
 847 {
 848         switch (msg->lm_magic) {
 849         case LUSTRE_MSG_MAGIC_V2: {
 850                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 851                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 852                 pb->pb_flags |= flags;
 853                 return;
 854         }
 855         default:
 856                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 857         }
 858 }
 859 EXPORT_SYMBOL(lustre_msg_add_flags);
 860
 861 void lustre_msg_set_flags(struct lustre_msg *msg, __u32 flags)
 862 {
 863         switch (msg->lm_magic) {
 864         case LUSTRE_MSG_MAGIC_V2: {
 865                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 866                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 867                 pb->pb_flags = flags;
 868                 return;
 869         }
 870         default:
 871                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 872         }
 873 }
 874
 875 void lustre_msg_clear_flags(struct lustre_msg *msg, __u32 flags)
 876 {
 877         switch (msg->lm_magic) {
 878         case LUSTRE_MSG_MAGIC_V2: {
 879                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 880                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 881                 pb->pb_flags &= ~(MSG_GEN_FLAG_MASK & flags);
 882                 return;
 883         }
 884         default:
 885                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 886         }
 887 }
 888 EXPORT_SYMBOL(lustre_msg_clear_flags);
 889
 890 __u32 lustre_msg_get_op_flags(struct lustre_msg *msg)
 891 {
 892         switch (msg->lm_magic) {
 893         case LUSTRE_MSG_MAGIC_V2: {
 894                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 895                 if (pb != NULL)
 896                         return pb->pb_op_flags;
 897
 898                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 899         }
 900         /* no break */
 901         default:
 902                 return 0;
 903         }
 904 }
 905
 906 void lustre_msg_add_op_flags(struct lustre_msg *msg, __u32 flags)
 907 {
 908         switch (msg->lm_magic) {
 909         case LUSTRE_MSG_MAGIC_V2: {
 910                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 911                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 912                 pb->pb_op_flags |= flags;
 913                 return;
 914         }
 915         default:
 916                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 917         }
 918 }
 919 EXPORT_SYMBOL(lustre_msg_add_op_flags);
 920
 921 struct lustre_handle *lustre_msg_get_handle(struct lustre_msg *msg)
 922 {
 923         switch (msg->lm_magic) {
 924         case LUSTRE_MSG_MAGIC_V2: {
 925                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 926                 if (pb == NULL) {
 927                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 928                         return NULL;
 929                 }
 930                 return &pb->pb_handle;
 931         }
 932         default:
 933                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 934                 return NULL;
 935         }
 936 }
 937
 938 __u32 lustre_msg_get_type(struct lustre_msg *msg)
 939 {
 940         switch (msg->lm_magic) {
 941         case LUSTRE_MSG_MAGIC_V2: {
 942                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 943                 if (pb == NULL) {
 944                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 945                         return PTL_RPC_MSG_ERR;
 946                 }
 947                 return pb->pb_type;
 948         }
 949         default:
 950                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 951                 return PTL_RPC_MSG_ERR;
 952         }
 953 }
 954 EXPORT_SYMBOL(lustre_msg_get_type);
 955
 956 __u32 lustre_msg_get_version(struct lustre_msg *msg)
 957 {
 958         switch (msg->lm_magic) {
 959         case LUSTRE_MSG_MAGIC_V2: {
 960                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 961                 if (pb == NULL) {
 962                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 963                         return 0;
 964                 }
 965                 return pb->pb_version;
 966         }
 967         default:
 968                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
 969                 return 0;
 970         }
 971 }
 972
 973 void lustre_msg_add_version(struct lustre_msg *msg, __u32 version)
 974 {
 975         switch (msg->lm_magic) {
 976         case LUSTRE_MSG_MAGIC_V2: {
 977                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 978                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
 979                 pb->pb_version |= version;
 980                 return;
 981         }
 982         default:
 983                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
 984         }
 985 }
 986
 987 __u32 lustre_msg_get_opc(struct lustre_msg *msg)
 988 {
 989         switch (msg->lm_magic) {
 990         case LUSTRE_MSG_MAGIC_V2: {
 991                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
 992                 if (pb == NULL) {
 993                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
 994                         return 0;
 995                 }
 996                 return pb->pb_opc;
 997         }
 998         default:
 999                 CERROR("incorrect message magic: %08x (msg:%p)\n",
1000                        msg->lm_magic, msg);
1001                 return 0;
1002         }
1003 }
1004 EXPORT_SYMBOL(lustre_msg_get_opc);
1005
1006 __u64 lustre_msg_get_last_xid(struct lustre_msg *msg)
1007 {
1008         switch (msg->lm_magic) {
1009         case LUSTRE_MSG_MAGIC_V2: {
1010                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1011                 if (pb == NULL) {
1012                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1013                         return 0;
1014                 }
1015                 return pb->pb_last_xid;
1016         }
1017         default:
1018                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1019                 return 0;
1020         }
1021 }
1022 EXPORT_SYMBOL(lustre_msg_get_last_xid);
1023
1024 __u16 lustre_msg_get_tag(struct lustre_msg *msg)
1025 {
1026         switch (msg->lm_magic) {
1027         case LUSTRE_MSG_MAGIC_V2: {
1028                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1029                 if (!pb) {
1030                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1031                         return 0;
1032                 }
1033                 return pb->pb_tag;
1034         }
1035         default:
1036                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1037                 return 0;
1038         }
1039 }
1040 EXPORT_SYMBOL(lustre_msg_get_tag);
1041
1042 __u64 lustre_msg_get_last_committed(struct lustre_msg *msg)
1043 {
1044         switch (msg->lm_magic) {
1045         case LUSTRE_MSG_MAGIC_V2: {
1046                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1047                 if (pb == NULL) {
1048                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1049                         return 0;
1050                 }
1051                 return pb->pb_last_committed;
1052         }
1053         default:
1054                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1055                 return 0;
1056         }
1057 }
1058 EXPORT_SYMBOL(lustre_msg_get_last_committed);
1059
1060 __u64 *lustre_msg_get_versions(struct lustre_msg *msg)
1061 {
1062         switch (msg->lm_magic) {
1063         case LUSTRE_MSG_MAGIC_V2: {
1064                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1065                 if (pb == NULL) {
1066                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1067                         return NULL;
1068                 }
1069                 return pb->pb_pre_versions;
1070         }
1071         default:
1072                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1073                 return NULL;
1074         }
1075 }
1076 EXPORT_SYMBOL(lustre_msg_get_versions);
1077
1078 __u64 lustre_msg_get_transno(struct lustre_msg *msg)
1079 {
1080         switch (msg->lm_magic) {
1081         case LUSTRE_MSG_MAGIC_V2: {
1082                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1083                 if (pb == NULL) {
1084                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1085                         return 0;
1086                 }
1087                 return pb->pb_transno;
1088         }
1089         default:
1090                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1091                 return 0;
1092         }
1093 }
1094 EXPORT_SYMBOL(lustre_msg_get_transno);
1095
1096 int lustre_msg_get_status(struct lustre_msg *msg)
1097 {
1098         switch (msg->lm_magic) {
1099         case LUSTRE_MSG_MAGIC_V2: {
1100                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1101                 if (pb != NULL)
1102                         return pb->pb_status;
1103                 CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1104         }
1105         /* no break */
1106         default:
1107                 /* status might be printed in debug code while message
1108                 * uninitialized */
1109                 return -EINVAL;
1110         }
1111 }
1112 EXPORT_SYMBOL(lustre_msg_get_status);
1113
1114 __u64 lustre_msg_get_slv(struct lustre_msg *msg)
1115 {
1116         switch (msg->lm_magic) {
1117         case LUSTRE_MSG_MAGIC_V2: {
1118                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1119                 if (pb == NULL) {
1120                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1121                         return -EINVAL;
1122                 }
1123                 return pb->pb_slv;
1124         }
1125         default:
1126                 CERROR("invalid msg magic %08x\n", msg->lm_magic);
1127                 return -EINVAL;
1128         }
1129 }
1130
1131
1132 void lustre_msg_set_slv(struct lustre_msg *msg, __u64 slv)
1133 {
1134         switch (msg->lm_magic) {
1135         case LUSTRE_MSG_MAGIC_V2: {
1136                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1137                 if (pb == NULL) {
1138                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1139                         return;
1140                 }
1141                 pb->pb_slv = slv;
1142                 return;
1143         }
1144         default:
1145                 CERROR("invalid msg magic %x\n", msg->lm_magic);
1146                 return;
1147         }
1148 }
1149
1150 __u32 lustre_msg_get_limit(struct lustre_msg *msg)
1151 {
1152         switch (msg->lm_magic) {
1153         case LUSTRE_MSG_MAGIC_V2: {
1154                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1155                 if (pb == NULL) {
1156                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1157                         return -EINVAL;
1158                 }
1159                 return pb->pb_limit;
1160         }
1161         default:
1162                 CERROR("invalid msg magic %x\n", msg->lm_magic);
1163                 return -EINVAL;
1164         }
1165 }
1166
1167
1168 void lustre_msg_set_limit(struct lustre_msg *msg, __u64 limit)
1169 {
1170         switch (msg->lm_magic) {
1171         case LUSTRE_MSG_MAGIC_V2: {
1172                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1173                 if (pb == NULL) {
1174                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1175                         return;
1176                 }
1177                 pb->pb_limit = limit;
1178                 return;
1179         }
1180         default:
1181                 CERROR("invalid msg magic %08x\n", msg->lm_magic);
1182                 return;
1183         }
1184 }
1185
1186 __u32 lustre_msg_get_conn_cnt(struct lustre_msg *msg)
1187 {
1188         switch (msg->lm_magic) {
1189         case LUSTRE_MSG_MAGIC_V2: {
1190                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1191                 if (pb == NULL) {
1192                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1193                         return 0;
1194                 }
1195                 return pb->pb_conn_cnt;
1196         }
1197         default:
1198                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1199                 return 0;
1200         }
1201 }
1202 EXPORT_SYMBOL(lustre_msg_get_conn_cnt);
1203
1204 __u32 lustre_msg_get_magic(struct lustre_msg *msg)
1205 {
1206         switch (msg->lm_magic) {
1207         case LUSTRE_MSG_MAGIC_V2:
1208                 return msg->lm_magic;
1209         default:
1210                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1211                 return 0;
1212         }
1213 }
1214
1215 __u32 lustre_msg_get_timeout(struct lustre_msg *msg)
1216 {
1217         switch (msg->lm_magic) {
1218         case LUSTRE_MSG_MAGIC_V2: {
1219                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1220                 if (pb == NULL) {
1221                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1222                         return 0;
1223                 }
1224                 return pb->pb_timeout;
1225         }
1226         default:
1227                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1228                 return 0;
1229         }
1230 }
1231
1232 __u32 lustre_msg_get_service_time(struct lustre_msg *msg)
1233 {
1234         switch (msg->lm_magic) {
1235         case LUSTRE_MSG_MAGIC_V2: {
1236                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1237                 if (pb == NULL) {
1238                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1239                         return 0;
1240                 }
1241                 return pb->pb_service_time;
1242         }
1243         default:
1244                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1245                 return 0;
1246         }
1247 }
1248
1249 char *lustre_msg_get_jobid(struct lustre_msg *msg)
1250 {
1251         switch (msg->lm_magic) {
1252         case LUSTRE_MSG_MAGIC_V2: {
1253                 struct ptlrpc_body *pb =
1254                         lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1255                                           sizeof(struct ptlrpc_body));
1256                 if (!pb)
1257                         return NULL;
1258
1259                 return pb->pb_jobid;
1260         }
1261         default:
1262                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1263                 return NULL;
1264         }
1265 }
1266 EXPORT_SYMBOL(lustre_msg_get_jobid);
1267
1268 __u32 lustre_msg_get_cksum(struct lustre_msg *msg)
1269 {
1270         switch (msg->lm_magic) {
1271         case LUSTRE_MSG_MAGIC_V2:
1272                 return msg->lm_cksum;
1273         default:
1274                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1275                 return 0;
1276         }
1277 }
1278
1279 __u64 lustre_msg_get_mbits(struct lustre_msg *msg)
1280 {
1281         switch (msg->lm_magic) {
1282         case LUSTRE_MSG_MAGIC_V2: {
1283                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1284                 if (pb == NULL) {
1285                         CERROR("invalid msg %p: no ptlrpc body!\n", msg);
1286                         return 0;
1287                 }
1288                 return pb->pb_mbits;
1289         }
1290         default:
1291                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1292                 return 0;
1293         }
1294 }
1295
1296 __u32 lustre_msg_calc_cksum(struct lustre_msg *msg)
1297 {
1298         switch (msg->lm_magic) {
1299         case LUSTRE_MSG_MAGIC_V2: {
1300                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1301                 __u32 len = lustre_msg_buflen(msg, MSG_PTLRPC_BODY_OFF);
1302
1303                 unsigned int hsize = 4;
1304                 __u32 crc;
1305
1306                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1307                 cfs_crypto_hash_digest(CFS_HASH_ALG_CRC32, (unsigned char *)pb,
1308                                        len, NULL, 0, (unsigned char *)&crc,
1309                                        &hsize);
1310                 return crc;
1311         }
1312         default:
1313                 CERROR("incorrect message magic: %08x\n", msg->lm_magic);
1314                 return 0;
1315         }
1316 }
1317
1318 void lustre_msg_set_handle(struct lustre_msg *msg, struct lustre_handle *handle)
1319 {
1320         switch (msg->lm_magic) {
1321         case LUSTRE_MSG_MAGIC_V2: {
1322                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1323                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1324                 pb->pb_handle = *handle;
1325                 return;
1326         }
1327         default:
1328                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1329         }
1330 }
1331
1332 void lustre_msg_set_type(struct lustre_msg *msg, __u32 type)
1333 {
1334         switch (msg->lm_magic) {
1335         case LUSTRE_MSG_MAGIC_V2: {
1336                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1337                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1338                 pb->pb_type = type;
1339                 return;
1340                 }
1341         default:
1342                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1343         }
1344 }
1345
1346 void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc)
1347 {
1348         switch (msg->lm_magic) {
1349         case LUSTRE_MSG_MAGIC_V2: {
1350                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1351                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1352                 pb->pb_opc = opc;
1353                 return;
1354         }
1355         default:
1356                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1357         }
1358 }
1359
1360 void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid)
1361 {
1362         switch (msg->lm_magic) {
1363         case LUSTRE_MSG_MAGIC_V2: {
1364                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1365                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1366                 pb->pb_last_xid = last_xid;
1367                 return;
1368         }
1369         default:
1370                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1371         }
1372 }
1373 EXPORT_SYMBOL(lustre_msg_set_last_xid);
1374
1375 void lustre_msg_set_tag(struct lustre_msg *msg, __u16 tag)
1376 {
1377         switch (msg->lm_magic) {
1378         case LUSTRE_MSG_MAGIC_V2: {
1379                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1380                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1381                 pb->pb_tag = tag;
1382                 return;
1383         }
1384         default:
1385                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1386         }
1387 }
1388 EXPORT_SYMBOL(lustre_msg_set_tag);
1389
1390 void lustre_msg_set_last_committed(struct lustre_msg *msg, __u64 last_committed)
1391 {
1392         switch (msg->lm_magic) {
1393         case LUSTRE_MSG_MAGIC_V2: {
1394                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1395                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1396                 pb->pb_last_committed = last_committed;
1397                 return;
1398         }
1399         default:
1400                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1401         }
1402 }
1403
1404 void lustre_msg_set_versions(struct lustre_msg *msg, __u64 *versions)
1405 {
1406         switch (msg->lm_magic) {
1407         case LUSTRE_MSG_MAGIC_V2: {
1408                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1409                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1410                 pb->pb_pre_versions[0] = versions[0];
1411                 pb->pb_pre_versions[1] = versions[1];
1412                 pb->pb_pre_versions[2] = versions[2];
1413                 pb->pb_pre_versions[3] = versions[3];
1414                 return;
1415         }
1416         default:
1417                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1418         }
1419 }
1420 EXPORT_SYMBOL(lustre_msg_set_versions);
1421
1422 void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno)
1423 {
1424         switch (msg->lm_magic) {
1425         case LUSTRE_MSG_MAGIC_V2: {
1426                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1427                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1428                 pb->pb_transno = transno;
1429                 return;
1430         }
1431         default:
1432                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1433         }
1434 }
1435 EXPORT_SYMBOL(lustre_msg_set_transno);
1436
1437 void lustre_msg_set_status(struct lustre_msg *msg, __u32 status)
1438 {
1439         switch (msg->lm_magic) {
1440         case LUSTRE_MSG_MAGIC_V2: {
1441                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1442                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1443                 pb->pb_status = status;
1444                 return;
1445         }
1446         default:
1447                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1448         }
1449 }
1450 EXPORT_SYMBOL(lustre_msg_set_status);
1451
1452 void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt)
1453 {
1454         switch (msg->lm_magic) {
1455         case LUSTRE_MSG_MAGIC_V2: {
1456                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1457                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1458                 pb->pb_conn_cnt = conn_cnt;
1459                 return;
1460         }
1461         default:
1462                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1463         }
1464 }
1465
1466 void lustre_msg_set_timeout(struct lustre_msg *msg, __u32 timeout)
1467 {
1468         switch (msg->lm_magic) {
1469         case LUSTRE_MSG_MAGIC_V2: {
1470                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1471                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1472                 pb->pb_timeout = timeout;
1473                 return;
1474         }
1475         default:
1476                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1477         }
1478 }
1479
1480 void lustre_msg_set_service_time(struct lustre_msg *msg, __u32 service_time)
1481 {
1482         switch (msg->lm_magic) {
1483         case LUSTRE_MSG_MAGIC_V2: {
1484                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1485                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1486                 pb->pb_service_time = service_time;
1487                 return;
1488         }
1489         default:
1490                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1491         }
1492 }
1493
1494 void lustre_msg_set_jobid(struct lustre_msg *msg, char *jobid)
1495 {
1496         switch (msg->lm_magic) {
1497         case LUSTRE_MSG_MAGIC_V2: {
1498                 __u32 opc = lustre_msg_get_opc(msg);
1499                 struct ptlrpc_body *pb;
1500
1501                 /* Don't set jobid for ldlm ast RPCs, they've been shrinked.
1502                  * See the comment in ptlrpc_request_pack(). */
1503                 if (!opc || opc == LDLM_BL_CALLBACK ||
1504                     opc == LDLM_CP_CALLBACK || opc == LDLM_GL_CALLBACK)
1505                         return;
1506
1507                 pb = lustre_msg_buf_v2(msg, MSG_PTLRPC_BODY_OFF,
1508                                        sizeof(struct ptlrpc_body));
1509                 LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
1510
1511                 if (jobid != NULL)
1512                         memcpy(pb->pb_jobid, jobid, LUSTRE_JOBID_SIZE);
1513                 else if (pb->pb_jobid[0] == '\0')
1514                         lustre_get_jobid(pb->pb_jobid);
1515                 return;
1516         }
1517         default:
1518                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1519         }
1520 }
1521 EXPORT_SYMBOL(lustre_msg_set_jobid);
1522
1523 void lustre_msg_set_cksum(struct lustre_msg *msg, __u32 cksum)
1524 {
1525         switch (msg->lm_magic) {
1526         case LUSTRE_MSG_MAGIC_V2:
1527                 msg->lm_cksum = cksum;
1528                 return;
1529         default:
1530                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1531         }
1532 }
1533
1534 void lustre_msg_set_mbits(struct lustre_msg *msg, __u64 mbits)
1535 {
1536         switch (msg->lm_magic) {
1537         case LUSTRE_MSG_MAGIC_V2: {
1538                 struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
1539
1540                 LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
1541                 pb->pb_mbits = mbits;
1542                 return;
1543         }
1544         default:
1545                 LASSERTF(0, "incorrect message magic: %08x\n", msg->lm_magic);
1546         }
1547 }
1548
1549 void ptlrpc_request_set_replen(struct ptlrpc_request *req)
1550 {
1551         int count = req_capsule_filled_sizes(&req->rq_pill, RCL_SERVER);
1552
1553         req->rq_replen = lustre_msg_size(req->rq_reqmsg->lm_magic, count,
1554                                          req->rq_pill.rc_area[RCL_SERVER]);
1555         if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
1556                 req->rq_reqmsg->lm_repsize = req->rq_replen;
1557 }
1558 EXPORT_SYMBOL(ptlrpc_request_set_replen);
1559
1560 void ptlrpc_req_set_repsize(struct ptlrpc_request *req, int count, __u32 *lens)
1561 {
1562         req->rq_replen = lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens);
1563         if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
1564                 req->rq_reqmsg->lm_repsize = req->rq_replen;
1565 }
1566
1567 /**
1568  * Send a remote set_info_async.
1569  *
1570  * This may go from client to server or server to client.
1571  */
1572 int do_set_info_async(struct obd_import *imp,
1573                       int opcode, int version,
1574                       size_t keylen, void *key,
1575                       size_t vallen, void *val,
1576                       struct ptlrpc_request_set *set)
1577 {
1578         struct ptlrpc_request *req;
1579         char                  *tmp;
1580         int                    rc;
1581         ENTRY;
1582
1583         req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
1584         if (req == NULL)
1585                 RETURN(-ENOMEM);
1586
1587         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1588                              RCL_CLIENT, keylen);
1589         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1590                              RCL_CLIENT, vallen);
1591         rc = ptlrpc_request_pack(req, version, opcode);
1592         if (rc) {
1593                 ptlrpc_request_free(req);
1594                 RETURN(rc);
1595         }
1596
1597         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1598         memcpy(tmp, key, keylen);
1599         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1600         memcpy(tmp, val, vallen);
1601
1602         ptlrpc_request_set_replen(req);
1603
1604         if (set) {
1605                 ptlrpc_set_add_req(set, req);
1606                 ptlrpc_check_set(NULL, set);
1607         } else {
1608                 rc = ptlrpc_queue_wait(req);
1609                 ptlrpc_req_finished(req);
1610         }
1611
1612         RETURN(rc);
1613 }
1614 EXPORT_SYMBOL(do_set_info_async);
1615
1616 /* byte flipping routines for all wire types declared in
1617  * lustre_idl.h implemented here.
1618  */
1619 void lustre_swab_ptlrpc_body(struct ptlrpc_body *b)
1620 {
1621         __swab32s (&b->pb_type);
1622         __swab32s (&b->pb_version);
1623         __swab32s (&b->pb_opc);
1624         __swab32s (&b->pb_status);
1625         __swab64s (&b->pb_last_xid);
1626         __swab16s (&b->pb_tag);
1627         __swab64s (&b->pb_last_committed);
1628         __swab64s (&b->pb_transno);
1629         __swab32s (&b->pb_flags);
1630         __swab32s (&b->pb_op_flags);
1631         __swab32s (&b->pb_conn_cnt);
1632         __swab32s (&b->pb_timeout);
1633         __swab32s (&b->pb_service_time);
1634         __swab32s (&b->pb_limit);
1635         __swab64s (&b->pb_slv);
1636         __swab64s (&b->pb_pre_versions[0]);
1637         __swab64s (&b->pb_pre_versions[1]);
1638         __swab64s (&b->pb_pre_versions[2]);
1639         __swab64s (&b->pb_pre_versions[3]);
1640         __swab64s(&b->pb_mbits);
1641         CLASSERT(offsetof(typeof(*b), pb_padding0) != 0);
1642         CLASSERT(offsetof(typeof(*b), pb_padding1) != 0);
1643         CLASSERT(offsetof(typeof(*b), pb_padding64_0) != 0);
1644         CLASSERT(offsetof(typeof(*b), pb_padding64_1) != 0);
1645         CLASSERT(offsetof(typeof(*b), pb_padding64_2) != 0);
1646         /* While we need to maintain compatibility between
1647          * clients and servers without ptlrpc_body_v2 (< 2.3)
1648          * do not swab any fields beyond pb_jobid, as we are
1649          * using this swab function for both ptlrpc_body
1650          * and ptlrpc_body_v2. */
1651         CLASSERT(offsetof(typeof(*b), pb_jobid) != 0);
1652 }
1653
1654 void lustre_swab_connect(struct obd_connect_data *ocd)
1655 {
1656         __swab64s(&ocd->ocd_connect_flags);
1657         __swab32s(&ocd->ocd_version);
1658         __swab32s(&ocd->ocd_grant);
1659         __swab64s(&ocd->ocd_ibits_known);
1660         __swab32s(&ocd->ocd_index);
1661         __swab32s(&ocd->ocd_brw_size);
1662         /* ocd_blocksize and ocd_inodespace don't need to be swabbed because
1663          * they are 8-byte values */
1664         __swab16s(&ocd->ocd_grant_tax_kb);
1665         __swab32s(&ocd->ocd_grant_max_blks);
1666         __swab64s(&ocd->ocd_transno);
1667         __swab32s(&ocd->ocd_group);
1668         __swab32s(&ocd->ocd_cksum_types);
1669         __swab32s(&ocd->ocd_instance);
1670         /* Fields after ocd_cksum_types are only accessible by the receiver
1671          * if the corresponding flag in ocd_connect_flags is set. Accessing
1672          * any field after ocd_maxbytes on the receiver without a valid flag
1673          * may result in out-of-bound memory access and kernel oops. */
1674         if (ocd->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)
1675                 __swab32s(&ocd->ocd_max_easize);
1676         if (ocd->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
1677                 __swab64s(&ocd->ocd_maxbytes);
1678         if (ocd->ocd_connect_flags & OBD_CONNECT_MULTIMODRPCS)
1679                 __swab16s(&ocd->ocd_maxmodrpcs);
1680         CLASSERT(offsetof(typeof(*ocd), padding0) != 0);
1681         CLASSERT(offsetof(typeof(*ocd), padding1) != 0);
1682         if (ocd->ocd_connect_flags & OBD_CONNECT_FLAGS2)
1683                 __swab64s(&ocd->ocd_connect_flags2);
1684         CLASSERT(offsetof(typeof(*ocd), padding3) != 0);
1685         CLASSERT(offsetof(typeof(*ocd), padding4) != 0);
1686         CLASSERT(offsetof(typeof(*ocd), padding5) != 0);
1687         CLASSERT(offsetof(typeof(*ocd), padding6) != 0);
1688         CLASSERT(offsetof(typeof(*ocd), padding7) != 0);
1689         CLASSERT(offsetof(typeof(*ocd), padding8) != 0);
1690         CLASSERT(offsetof(typeof(*ocd), padding9) != 0);
1691         CLASSERT(offsetof(typeof(*ocd), paddingA) != 0);
1692         CLASSERT(offsetof(typeof(*ocd), paddingB) != 0);
1693         CLASSERT(offsetof(typeof(*ocd), paddingC) != 0);
1694         CLASSERT(offsetof(typeof(*ocd), paddingD) != 0);
1695         CLASSERT(offsetof(typeof(*ocd), paddingE) != 0);
1696         CLASSERT(offsetof(typeof(*ocd), paddingF) != 0);
1697 }
1698
1699 static void lustre_swab_ost_layout(struct ost_layout *ol)
1700 {
1701         __swab32s(&ol->ol_stripe_size);
1702         __swab32s(&ol->ol_stripe_count);
1703         __swab64s(&ol->ol_comp_start);
1704         __swab64s(&ol->ol_comp_end);
1705         __swab32s(&ol->ol_comp_id);
1706 }
1707
1708 void lustre_swab_obdo (struct obdo  *o)
1709 {
1710         __swab64s(&o->o_valid);
1711         lustre_swab_ost_id(&o->o_oi);
1712         __swab64s(&o->o_parent_seq);
1713         __swab64s(&o->o_size);
1714         __swab64s(&o->o_mtime);
1715         __swab64s(&o->o_atime);
1716         __swab64s(&o->o_ctime);
1717         __swab64s(&o->o_blocks);
1718         __swab64s(&o->o_grant);
1719         __swab32s(&o->o_blksize);
1720         __swab32s(&o->o_mode);
1721         __swab32s(&o->o_uid);
1722         __swab32s(&o->o_gid);
1723         __swab32s(&o->o_flags);
1724         __swab32s(&o->o_nlink);
1725         __swab32s(&o->o_parent_oid);
1726         __swab32s(&o->o_misc);
1727         __swab64s(&o->o_ioepoch);
1728         __swab32s(&o->o_stripe_idx);
1729         __swab32s(&o->o_parent_ver);
1730         lustre_swab_ost_layout(&o->o_layout);
1731         __swab32s(&o->o_layout_version);
1732         __swab32s(&o->o_uid_h);
1733         __swab32s(&o->o_gid_h);
1734         __swab64s(&o->o_data_version);
1735         __swab32s(&o->o_projid);
1736         CLASSERT(offsetof(typeof(*o), o_padding_4) != 0);
1737         CLASSERT(offsetof(typeof(*o), o_padding_5) != 0);
1738         CLASSERT(offsetof(typeof(*o), o_padding_6) != 0);
1739
1740 }
1741 EXPORT_SYMBOL(lustre_swab_obdo);
1742
1743 void lustre_swab_obd_statfs (struct obd_statfs *os)
1744 {
1745         __swab64s (&os->os_type);
1746         __swab64s (&os->os_blocks);
1747         __swab64s (&os->os_bfree);
1748         __swab64s (&os->os_bavail);
1749         __swab64s (&os->os_files);
1750         __swab64s (&os->os_ffree);
1751         /* no need to swab os_fsid */
1752         __swab32s (&os->os_bsize);
1753         __swab32s (&os->os_namelen);
1754         __swab64s (&os->os_maxbytes);
1755         __swab32s (&os->os_state);
1756         CLASSERT(offsetof(typeof(*os), os_fprecreated) != 0);
1757         CLASSERT(offsetof(typeof(*os), os_spare2) != 0);
1758         CLASSERT(offsetof(typeof(*os), os_spare3) != 0);
1759         CLASSERT(offsetof(typeof(*os), os_spare4) != 0);
1760         CLASSERT(offsetof(typeof(*os), os_spare5) != 0);
1761         CLASSERT(offsetof(typeof(*os), os_spare6) != 0);
1762         CLASSERT(offsetof(typeof(*os), os_spare7) != 0);
1763         CLASSERT(offsetof(typeof(*os), os_spare8) != 0);
1764         CLASSERT(offsetof(typeof(*os), os_spare9) != 0);
1765 }
1766
1767 void lustre_swab_obd_ioobj(struct obd_ioobj *ioo)
1768 {
1769         lustre_swab_ost_id(&ioo->ioo_oid);
1770         __swab32s(&ioo->ioo_max_brw);
1771         __swab32s(&ioo->ioo_bufcnt);
1772 }
1773
1774 void lustre_swab_niobuf_remote(struct niobuf_remote *nbr)
1775 {
1776         __swab64s(&nbr->rnb_offset);
1777         __swab32s(&nbr->rnb_len);
1778         __swab32s(&nbr->rnb_flags);
1779 }
1780
1781 void lustre_swab_ost_body (struct ost_body *b)
1782 {
1783         lustre_swab_obdo (&b->oa);
1784 }
1785
1786 void lustre_swab_ost_last_id(u64 *id)
1787 {
1788         __swab64s(id);
1789 }
1790
1791 void lustre_swab_generic_32s(__u32 *val)
1792 {
1793         __swab32s(val);
1794 }
1795
1796 void lustre_swab_gl_lquota_desc(struct ldlm_gl_lquota_desc *desc)
1797 {
1798         lustre_swab_lu_fid(&desc->gl_id.qid_fid);
1799         __swab64s(&desc->gl_flags);
1800         __swab64s(&desc->gl_ver);
1801         __swab64s(&desc->gl_hardlimit);
1802         __swab64s(&desc->gl_softlimit);
1803         __swab64s(&desc->gl_time);
1804         CLASSERT(offsetof(typeof(*desc), gl_pad2) != 0);
1805 }
1806 EXPORT_SYMBOL(lustre_swab_gl_lquota_desc);
1807
1808 void lustre_swab_gl_barrier_desc(struct ldlm_gl_barrier_desc *desc)
1809 {
1810         __swab32s(&desc->lgbd_status);
1811         __swab32s(&desc->lgbd_timeout);
1812         CLASSERT(offsetof(typeof(*desc), lgbd_padding) != 0);
1813 }
1814 EXPORT_SYMBOL(lustre_swab_gl_barrier_desc);
1815
1816 void lustre_swab_ost_lvb_v1(struct ost_lvb_v1 *lvb)
1817 {
1818         __swab64s(&lvb->lvb_size);
1819         __swab64s(&lvb->lvb_mtime);
1820         __swab64s(&lvb->lvb_atime);
1821         __swab64s(&lvb->lvb_ctime);
1822         __swab64s(&lvb->lvb_blocks);
1823 }
1824 EXPORT_SYMBOL(lustre_swab_ost_lvb_v1);
1825
1826 void lustre_swab_ost_lvb(struct ost_lvb *lvb)
1827 {
1828         __swab64s(&lvb->lvb_size);
1829         __swab64s(&lvb->lvb_mtime);
1830         __swab64s(&lvb->lvb_atime);
1831         __swab64s(&lvb->lvb_ctime);
1832         __swab64s(&lvb->lvb_blocks);
1833         __swab32s(&lvb->lvb_mtime_ns);
1834         __swab32s(&lvb->lvb_atime_ns);
1835         __swab32s(&lvb->lvb_ctime_ns);
1836         __swab32s(&lvb->lvb_padding);
1837 }
1838 EXPORT_SYMBOL(lustre_swab_ost_lvb);
1839
1840 void lustre_swab_lquota_lvb(struct lquota_lvb *lvb)
1841 {
1842         __swab64s(&lvb->lvb_flags);
1843         __swab64s(&lvb->lvb_id_may_rel);
1844         __swab64s(&lvb->lvb_id_rel);
1845         __swab64s(&lvb->lvb_id_qunit);
1846         __swab64s(&lvb->lvb_pad1);
1847 }
1848 EXPORT_SYMBOL(lustre_swab_lquota_lvb);
1849
1850 void lustre_swab_barrier_lvb(struct barrier_lvb *lvb)
1851 {
1852         __swab32s(&lvb->lvb_status);
1853         __swab32s(&lvb->lvb_index);
1854         CLASSERT(offsetof(typeof(*lvb), lvb_padding) != 0);
1855 }
1856 EXPORT_SYMBOL(lustre_swab_barrier_lvb);
1857
1858 void lustre_swab_mdt_body (struct mdt_body *b)
1859 {
1860         lustre_swab_lu_fid(&b->mbo_fid1);
1861         lustre_swab_lu_fid(&b->mbo_fid2);
1862         /* handle is opaque */
1863         __swab64s(&b->mbo_valid);
1864         __swab64s(&b->mbo_size);
1865         __swab64s(&b->mbo_mtime);
1866         __swab64s(&b->mbo_atime);
1867         __swab64s(&b->mbo_ctime);
1868         __swab64s(&b->mbo_blocks);
1869         __swab64s(&b->mbo_ioepoch);
1870         __swab64s(&b->mbo_t_state);
1871         __swab32s(&b->mbo_fsuid);
1872         __swab32s(&b->mbo_fsgid);
1873         __swab32s(&b->mbo_capability);
1874         __swab32s(&b->mbo_mode);
1875         __swab32s(&b->mbo_uid);
1876         __swab32s(&b->mbo_gid);
1877         __swab32s(&b->mbo_flags);
1878         __swab32s(&b->mbo_rdev);
1879         __swab32s(&b->mbo_nlink);
1880         CLASSERT(offsetof(typeof(*b), mbo_unused2) != 0);
1881         __swab32s(&b->mbo_suppgid);
1882         __swab32s(&b->mbo_eadatasize);
1883         __swab32s(&b->mbo_aclsize);
1884         __swab32s(&b->mbo_max_mdsize);
1885         CLASSERT(offsetof(typeof(*b), mbo_unused3) != 0);
1886         __swab32s(&b->mbo_uid_h);
1887         __swab32s(&b->mbo_gid_h);
1888         __swab32s(&b->mbo_projid);
1889         __swab64s(&b->mbo_dom_size);
1890         __swab64s(&b->mbo_dom_blocks);
1891         CLASSERT(offsetof(typeof(*b), mbo_padding_8) != 0);
1892         CLASSERT(offsetof(typeof(*b), mbo_padding_9) != 0);
1893         CLASSERT(offsetof(typeof(*b), mbo_padding_10) != 0);
1894 }
1895
1896 void lustre_swab_mdt_ioepoch(struct mdt_ioepoch *b)
1897 {
1898         /* mio_handle is opaque */
1899         CLASSERT(offsetof(typeof(*b), mio_unused1) != 0);
1900         CLASSERT(offsetof(typeof(*b), mio_unused2) != 0);
1901         CLASSERT(offsetof(typeof(*b), mio_padding) != 0);
1902 }
1903
1904 void lustre_swab_mgs_target_info(struct mgs_target_info *mti)
1905 {
1906         int i;
1907
1908         __swab32s(&mti->mti_lustre_ver);
1909         __swab32s(&mti->mti_stripe_index);
1910         __swab32s(&mti->mti_config_ver);
1911         __swab32s(&mti->mti_flags);
1912         __swab32s(&mti->mti_instance);
1913         __swab32s(&mti->mti_nid_count);
1914         CLASSERT(sizeof(lnet_nid_t) == sizeof(__u64));
1915         for (i = 0; i < MTI_NIDS_MAX; i++)
1916                 __swab64s(&mti->mti_nids[i]);
1917 }
1918
1919 void lustre_swab_mgs_nidtbl_entry(struct mgs_nidtbl_entry *entry)
1920 {
1921         __u8 i;
1922
1923         __swab64s(&entry->mne_version);
1924         __swab32s(&entry->mne_instance);
1925         __swab32s(&entry->mne_index);
1926         __swab32s(&entry->mne_length);
1927
1928         /* mne_nid_(count|type) must be one byte size because we're gonna
1929          * access it w/o swapping. */
1930         CLASSERT(sizeof(entry->mne_nid_count) == sizeof(__u8));
1931         CLASSERT(sizeof(entry->mne_nid_type) == sizeof(__u8));
1932
1933         /* remove this assertion if ipv6 is supported. */
1934         LASSERT(entry->mne_nid_type == 0);
1935         for (i = 0; i < entry->mne_nid_count; i++) {
1936                 CLASSERT(sizeof(lnet_nid_t) == sizeof(__u64));
1937                 __swab64s(&entry->u.nids[i]);
1938         }
1939 }
1940 EXPORT_SYMBOL(lustre_swab_mgs_nidtbl_entry);
1941
1942 void lustre_swab_mgs_config_body(struct mgs_config_body *body)
1943 {
1944         __swab64s(&body->mcb_offset);
1945         __swab32s(&body->mcb_units);
1946         __swab16s(&body->mcb_type);
1947 }
1948
1949 void lustre_swab_mgs_config_res(struct mgs_config_res *body)
1950 {
1951         __swab64s(&body->mcr_offset);
1952         __swab64s(&body->mcr_size);
1953 }
1954
1955 static void lustre_swab_obd_dqinfo (struct obd_dqinfo *i)
1956 {
1957         __swab64s (&i->dqi_bgrace);
1958         __swab64s (&i->dqi_igrace);
1959         __swab32s (&i->dqi_flags);
1960         __swab32s (&i->dqi_valid);
1961 }
1962
1963 static void lustre_swab_obd_dqblk (struct obd_dqblk *b)
1964 {
1965         __swab64s (&b->dqb_ihardlimit);
1966         __swab64s (&b->dqb_isoftlimit);
1967         __swab64s (&b->dqb_curinodes);
1968         __swab64s (&b->dqb_bhardlimit);
1969         __swab64s (&b->dqb_bsoftlimit);
1970         __swab64s (&b->dqb_curspace);
1971         __swab64s (&b->dqb_btime);
1972         __swab64s (&b->dqb_itime);
1973         __swab32s (&b->dqb_valid);
1974         CLASSERT(offsetof(typeof(*b), dqb_padding) != 0);
1975 }
1976
1977 void lustre_swab_obd_quotactl (struct obd_quotactl *q)
1978 {
1979         __swab32s (&q->qc_cmd);
1980         __swab32s (&q->qc_type);
1981         __swab32s (&q->qc_id);
1982         __swab32s (&q->qc_stat);
1983         lustre_swab_obd_dqinfo (&q->qc_dqinfo);
1984         lustre_swab_obd_dqblk (&q->qc_dqblk);
1985 }
1986
1987 void lustre_swab_fid2path(struct getinfo_fid2path *gf)
1988 {
1989         lustre_swab_lu_fid(&gf->gf_fid);
1990         __swab64s(&gf->gf_recno);
1991         __swab32s(&gf->gf_linkno);
1992         __swab32s(&gf->gf_pathlen);
1993 }
1994 EXPORT_SYMBOL(lustre_swab_fid2path);
1995
1996 static void lustre_swab_fiemap_extent(struct fiemap_extent *fm_extent)
1997 {
1998         __swab64s(&fm_extent->fe_logical);
1999         __swab64s(&fm_extent->fe_physical);
2000         __swab64s(&fm_extent->fe_length);
2001         __swab32s(&fm_extent->fe_flags);
2002         __swab32s(&fm_extent->fe_device);
2003 }
2004
2005 void lustre_swab_fiemap(struct fiemap *fiemap)
2006 {
2007         __u32 i;
2008
2009         __swab64s(&fiemap->fm_start);
2010         __swab64s(&fiemap->fm_length);
2011         __swab32s(&fiemap->fm_flags);
2012         __swab32s(&fiemap->fm_mapped_extents);
2013         __swab32s(&fiemap->fm_extent_count);
2014         __swab32s(&fiemap->fm_reserved);
2015
2016         for (i = 0; i < fiemap->fm_mapped_extents; i++)
2017                 lustre_swab_fiemap_extent(&fiemap->fm_extents[i]);
2018 }
2019
2020 void lustre_swab_idx_info(struct idx_info *ii)
2021 {
2022         __swab32s(&ii->ii_magic);
2023         __swab32s(&ii->ii_flags);
2024         __swab16s(&ii->ii_count);
2025         __swab32s(&ii->ii_attrs);
2026         lustre_swab_lu_fid(&ii->ii_fid);
2027         __swab64s(&ii->ii_version);
2028         __swab64s(&ii->ii_hash_start);
2029         __swab64s(&ii->ii_hash_end);
2030         __swab16s(&ii->ii_keysize);
2031         __swab16s(&ii->ii_recsize);
2032 }
2033
2034 void lustre_swab_lip_header(struct lu_idxpage *lip)
2035 {
2036         /* swab header */
2037         __swab32s(&lip->lip_magic);
2038         __swab16s(&lip->lip_flags);
2039         __swab16s(&lip->lip_nr);
2040 }
2041 EXPORT_SYMBOL(lustre_swab_lip_header);
2042
2043 void lustre_swab_mdt_rec_reint (struct mdt_rec_reint *rr)
2044 {
2045         __swab32s(&rr->rr_opcode);
2046         __swab32s(&rr->rr_cap);
2047         __swab32s(&rr->rr_fsuid);
2048         /* rr_fsuid_h is unused */
2049         __swab32s(&rr->rr_fsgid);
2050         /* rr_fsgid_h is unused */
2051         __swab32s(&rr->rr_suppgid1);
2052         /* rr_suppgid1_h is unused */
2053         __swab32s(&rr->rr_suppgid2);
2054         /* rr_suppgid2_h is unused */
2055         lustre_swab_lu_fid(&rr->rr_fid1);
2056         lustre_swab_lu_fid(&rr->rr_fid2);
2057         __swab64s(&rr->rr_mtime);
2058         __swab64s(&rr->rr_atime);
2059         __swab64s(&rr->rr_ctime);
2060         __swab64s(&rr->rr_size);
2061         __swab64s(&rr->rr_blocks);
2062         __swab32s(&rr->rr_bias);
2063         __swab32s(&rr->rr_mode);
2064         __swab32s(&rr->rr_flags);
2065         __swab32s(&rr->rr_flags_h);
2066         __swab32s(&rr->rr_umask);
2067
2068         CLASSERT(offsetof(typeof(*rr), rr_padding_4) != 0);
2069 };
2070
2071 void lustre_swab_lov_desc (struct lov_desc *ld)
2072 {
2073         __swab32s (&ld->ld_tgt_count);
2074         __swab32s (&ld->ld_active_tgt_count);
2075         __swab32s (&ld->ld_default_stripe_count);
2076         __swab32s (&ld->ld_pattern);
2077         __swab64s (&ld->ld_default_stripe_size);
2078         __swab64s (&ld->ld_default_stripe_offset);
2079         __swab32s (&ld->ld_qos_maxage);
2080         /* uuid endian insensitive */
2081 }
2082 EXPORT_SYMBOL(lustre_swab_lov_desc);
2083
2084 void lustre_swab_lmv_desc (struct lmv_desc *ld)
2085 {
2086         __swab32s (&ld->ld_tgt_count);
2087         __swab32s (&ld->ld_active_tgt_count);
2088         __swab32s (&ld->ld_default_stripe_count);
2089         __swab32s (&ld->ld_pattern);
2090         __swab64s (&ld->ld_default_hash_size);
2091         __swab32s (&ld->ld_qos_maxage);
2092         /* uuid endian insensitive */
2093 }
2094
2095 /* This structure is always in little-endian */
2096 static void lustre_swab_lmv_mds_md_v1(struct lmv_mds_md_v1 *lmm1)
2097 {
2098         int i;
2099
2100         __swab32s(&lmm1->lmv_magic);
2101         __swab32s(&lmm1->lmv_stripe_count);
2102         __swab32s(&lmm1->lmv_master_mdt_index);
2103         __swab32s(&lmm1->lmv_hash_type);
2104         __swab32s(&lmm1->lmv_layout_version);
2105         for (i = 0; i < lmm1->lmv_stripe_count; i++)
2106                 lustre_swab_lu_fid(&lmm1->lmv_stripe_fids[i]);
2107 }
2108
2109 void lustre_swab_lmv_mds_md(union lmv_mds_md *lmm)
2110 {
2111         switch (lmm->lmv_magic) {
2112         case LMV_MAGIC_V1:
2113                 lustre_swab_lmv_mds_md_v1(&lmm->lmv_md_v1);
2114                 break;
2115         default:
2116                 break;
2117         }
2118 }
2119 EXPORT_SYMBOL(lustre_swab_lmv_mds_md);
2120
2121 void lustre_swab_lmv_user_md(struct lmv_user_md *lum)
2122 {
2123         __swab32s(&lum->lum_magic);
2124         __swab32s(&lum->lum_stripe_count);
2125         __swab32s(&lum->lum_stripe_offset);
2126         __swab32s(&lum->lum_hash_type);
2127         __swab32s(&lum->lum_type);
2128         CLASSERT(offsetof(typeof(*lum), lum_padding1) != 0);
2129 }
2130 EXPORT_SYMBOL(lustre_swab_lmv_user_md);
2131
2132 static void lustre_print_v1v3(unsigned int lvl, struct lov_user_md *lum,
2133                               const char *msg)
2134 {
2135         CDEBUG(lvl, "%s lov_user_md %p:\n", msg, lum);
2136         CDEBUG(lvl, "\tlmm_magic: %#x\n", lum->lmm_magic);
2137         CDEBUG(lvl, "\tlmm_pattern: %#x\n", lum->lmm_pattern);
2138         CDEBUG(lvl, "\tlmm_object_id: %llu\n", lmm_oi_id(&lum->lmm_oi));
2139         CDEBUG(lvl, "\tlmm_object_gr: %llu\n", lmm_oi_seq(&lum->lmm_oi));
2140         CDEBUG(lvl, "\tlmm_stripe_size: %#x\n", lum->lmm_stripe_size);
2141         CDEBUG(lvl, "\tlmm_stripe_count: %#x\n", lum->lmm_stripe_count);
2142         CDEBUG(lvl, "\tlmm_stripe_offset/lmm_layout_gen: %#x\n",
2143                lum->lmm_stripe_offset);
2144         if (lum->lmm_magic == LOV_USER_MAGIC_V3) {
2145                 struct lov_user_md_v3 *v3 = (void *)lum;
2146                 CDEBUG(lvl, "\tlmm_pool_name: %s\n", v3->lmm_pool_name);
2147         }
2148         if (lum->lmm_magic == LOV_USER_MAGIC_SPECIFIC) {
2149                 struct lov_user_md_v3 *v3 = (void *)lum;
2150                 int i;
2151
2152                 if (v3->lmm_pool_name[0] != '\0')
2153                         CDEBUG(lvl, "\tlmm_pool_name: %s\n", v3->lmm_pool_name);
2154
2155                 CDEBUG(lvl, "\ttarget list:\n");
2156                 for (i = 0; i < v3->lmm_stripe_count; i++)
2157                         CDEBUG(lvl, "\t\t%u\n", v3->lmm_objects[i].l_ost_idx);
2158         }
2159 }
2160
2161 void lustre_print_user_md(unsigned int lvl, struct lov_user_md *lum,
2162                           const char *msg)
2163 {
2164         struct lov_comp_md_v1   *comp_v1;
2165         int                      i;
2166
2167         if (likely(!cfs_cdebug_show(lvl, DEBUG_SUBSYSTEM)))
2168                 return;
2169
2170         if (lum->lmm_magic == LOV_USER_MAGIC_V1 ||
2171             lum->lmm_magic == LOV_USER_MAGIC_V3) {
2172                 lustre_print_v1v3(lvl, lum, msg);
2173                 return;
2174         }
2175
2176         if (lum->lmm_magic != LOV_USER_MAGIC_COMP_V1) {
2177                 CDEBUG(lvl, "%s: bad magic: %x\n", msg, lum->lmm_magic);
2178                 return;
2179         }
2180
2181         comp_v1 = (struct lov_comp_md_v1 *)lum;
2182         CDEBUG(lvl, "%s: lov_comp_md_v1 %p:\n", msg, lum);
2183         CDEBUG(lvl, "\tlcm_magic: %#x\n", comp_v1->lcm_magic);
2184         CDEBUG(lvl, "\tlcm_size: %#x\n", comp_v1->lcm_size);
2185         CDEBUG(lvl, "\tlcm_layout_gen: %#x\n", comp_v1->lcm_layout_gen);
2186         CDEBUG(lvl, "\tlcm_flags: %#x\n", comp_v1->lcm_flags);
2187         CDEBUG(lvl, "\tlcm_entry_count: %#x\n\n", comp_v1->lcm_entry_count);
2188         CDEBUG(lvl, "\tlcm_mirror_count: %#x\n\n", comp_v1->lcm_mirror_count);
2189
2190         for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2191                 struct lov_comp_md_entry_v1 *ent = &comp_v1->lcm_entries[i];
2192                 struct lov_user_md *v1;
2193
2194                 CDEBUG(lvl, "\tentry %d:\n", i);
2195                 CDEBUG(lvl, "\tlcme_id: %#x\n", ent->lcme_id);
2196                 CDEBUG(lvl, "\tlcme_flags: %#x\n", ent->lcme_flags);
2197                 CDEBUG(lvl, "\tlcme_extent.e_start: %llu\n",
2198                        ent->lcme_extent.e_start);
2199                 CDEBUG(lvl, "\tlcme_extent.e_end: %llu\n",
2200                        ent->lcme_extent.e_end);
2201                 CDEBUG(lvl, "\tlcme_offset: %#x\n", ent->lcme_offset);
2202                 CDEBUG(lvl, "\tlcme_size: %#x\n\n", ent->lcme_size);
2203
2204                 v1 = (struct lov_user_md *)((char *)comp_v1 +
2205                                 comp_v1->lcm_entries[i].lcme_offset);
2206                 lustre_print_v1v3(lvl, v1, msg);
2207         }
2208 }
2209 EXPORT_SYMBOL(lustre_print_user_md);
2210
2211 static void lustre_swab_lmm_oi(struct ost_id *oi)
2212 {
2213         __swab64s(&oi->oi.oi_id);
2214         __swab64s(&oi->oi.oi_seq);
2215 }
2216
2217 static void lustre_swab_lov_user_md_common(struct lov_user_md_v1 *lum)
2218 {
2219         ENTRY;
2220         __swab32s(&lum->lmm_magic);
2221         __swab32s(&lum->lmm_pattern);
2222         lustre_swab_lmm_oi(&lum->lmm_oi);
2223         __swab32s(&lum->lmm_stripe_size);
2224         __swab16s(&lum->lmm_stripe_count);
2225         __swab16s(&lum->lmm_stripe_offset);
2226         EXIT;
2227 }
2228
2229 void lustre_swab_lov_user_md_v1(struct lov_user_md_v1 *lum)
2230 {
2231         ENTRY;
2232         CDEBUG(D_IOCTL, "swabbing lov_user_md v1\n");
2233         lustre_swab_lov_user_md_common(lum);
2234         EXIT;
2235 }
2236 EXPORT_SYMBOL(lustre_swab_lov_user_md_v1);
2237
2238 void lustre_swab_lov_user_md_v3(struct lov_user_md_v3 *lum)
2239 {
2240         ENTRY;
2241         CDEBUG(D_IOCTL, "swabbing lov_user_md v3\n");
2242         lustre_swab_lov_user_md_common((struct lov_user_md_v1 *)lum);
2243         /* lmm_pool_name nothing to do with char */
2244         EXIT;
2245 }
2246 EXPORT_SYMBOL(lustre_swab_lov_user_md_v3);
2247
2248 void lustre_swab_lov_comp_md_v1(struct lov_comp_md_v1 *lum)
2249 {
2250         struct lov_comp_md_entry_v1     *ent;
2251         struct lov_user_md_v1   *v1;
2252         struct lov_user_md_v3   *v3;
2253         int     i;
2254         bool    cpu_endian;
2255         __u32   off, size;
2256         __u16   ent_count, stripe_count;
2257         ENTRY;
2258
2259         cpu_endian = lum->lcm_magic == LOV_USER_MAGIC_COMP_V1;
2260         ent_count = lum->lcm_entry_count;
2261         if (!cpu_endian)
2262                 __swab16s(&ent_count);
2263
2264         CDEBUG(D_IOCTL, "swabbing lov_user_comp_md v1\n");
2265         __swab32s(&lum->lcm_magic);
2266         __swab32s(&lum->lcm_size);
2267         __swab32s(&lum->lcm_layout_gen);
2268         __swab16s(&lum->lcm_flags);
2269         __swab16s(&lum->lcm_entry_count);
2270         __swab16s(&lum->lcm_mirror_count);
2271         CLASSERT(offsetof(typeof(*lum), lcm_padding1) != 0);
2272         CLASSERT(offsetof(typeof(*lum), lcm_padding2) != 0);
2273
2274         for (i = 0; i < ent_count; i++) {
2275                 ent = &lum->lcm_entries[i];
2276                 off = ent->lcme_offset;
2277                 size = ent->lcme_size;
2278
2279                 if (!cpu_endian) {
2280                         __swab32s(&off);
2281                         __swab32s(&size);
2282                 }
2283                 __swab32s(&ent->lcme_id);
2284                 __swab32s(&ent->lcme_flags);
2285                 __swab64s(&ent->lcme_extent.e_start);
2286                 __swab64s(&ent->lcme_extent.e_end);
2287                 __swab32s(&ent->lcme_offset);
2288                 __swab32s(&ent->lcme_size);
2289                 CLASSERT(offsetof(typeof(*ent), lcme_padding) != 0);
2290
2291                 v1 = (struct lov_user_md_v1 *)((char *)lum + off);
2292                 stripe_count = v1->lmm_stripe_count;
2293                 if (!cpu_endian)
2294                         __swab16s(&stripe_count);
2295
2296                 if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1) ||
2297                     v1->lmm_magic == LOV_USER_MAGIC_V1) {
2298                         lustre_swab_lov_user_md_v1(v1);
2299                         if (size > sizeof(*v1))
2300                                 lustre_swab_lov_user_md_objects(v1->lmm_objects,
2301                                                                 stripe_count);
2302                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3) ||
2303                            v1->lmm_magic == LOV_USER_MAGIC_V3 ||
2304                            v1->lmm_magic == __swab32(LOV_USER_MAGIC_SPECIFIC) ||
2305                            v1->lmm_magic == LOV_USER_MAGIC_SPECIFIC) {
2306                         v3 = (struct lov_user_md_v3 *)v1;
2307                         lustre_swab_lov_user_md_v3(v3);
2308                         if (size > sizeof(*v3))
2309                                 lustre_swab_lov_user_md_objects(v3->lmm_objects,
2310                                                                 stripe_count);
2311                 } else {
2312                         CERROR("Invalid magic %#x\n", v1->lmm_magic);
2313                 }
2314         }
2315 }
2316 EXPORT_SYMBOL(lustre_swab_lov_comp_md_v1);
2317
2318 void lustre_swab_lov_mds_md(struct lov_mds_md *lmm)
2319 {
2320         ENTRY;
2321         CDEBUG(D_IOCTL, "swabbing lov_mds_md\n");
2322         __swab32s(&lmm->lmm_magic);
2323         __swab32s(&lmm->lmm_pattern);
2324         lustre_swab_lmm_oi(&lmm->lmm_oi);
2325         __swab32s(&lmm->lmm_stripe_size);
2326         __swab16s(&lmm->lmm_stripe_count);
2327         __swab16s(&lmm->lmm_layout_gen);
2328         EXIT;
2329 }
2330 EXPORT_SYMBOL(lustre_swab_lov_mds_md);
2331
2332 void lustre_swab_lov_user_md_objects(struct lov_user_ost_data *lod,
2333                                      int stripe_count)
2334 {
2335         int i;
2336         ENTRY;
2337         for (i = 0; i < stripe_count; i++) {
2338                 lustre_swab_ost_id(&(lod[i].l_ost_oi));
2339                 __swab32s(&(lod[i].l_ost_gen));
2340                 __swab32s(&(lod[i].l_ost_idx));
2341         }
2342         EXIT;
2343 }
2344 EXPORT_SYMBOL(lustre_swab_lov_user_md_objects);
2345
2346 void lustre_swab_ldlm_res_id (struct ldlm_res_id *id)
2347 {
2348         int  i;
2349
2350         for (i = 0; i < RES_NAME_SIZE; i++)
2351                 __swab64s (&id->name[i]);
2352 }
2353
2354 void lustre_swab_ldlm_policy_data(union ldlm_wire_policy_data *d)
2355 {
2356         /* the lock data is a union and the first two fields are always an
2357          * extent so it's ok to process an LDLM_EXTENT and LDLM_FLOCK lock
2358          * data the same way. */
2359         __swab64s(&d->l_extent.start);
2360         __swab64s(&d->l_extent.end);
2361         __swab64s(&d->l_extent.gid);
2362         __swab64s(&d->l_flock.lfw_owner);
2363         __swab32s(&d->l_flock.lfw_pid);
2364 }
2365
2366 void lustre_swab_ldlm_intent (struct ldlm_intent *i)
2367 {
2368         __swab64s(&i->opc);
2369 }
2370
2371 void lustre_swab_ldlm_resource_desc(struct ldlm_resource_desc *r)
2372 {
2373         __swab32s(&r->lr_type);
2374         CLASSERT(offsetof(typeof(*r), lr_pad) != 0);
2375         lustre_swab_ldlm_res_id(&r->lr_name);
2376 }
2377
2378 void lustre_swab_ldlm_lock_desc (struct ldlm_lock_desc *l)
2379 {
2380         lustre_swab_ldlm_resource_desc (&l->l_resource);
2381         __swab32s (&l->l_req_mode);
2382         __swab32s (&l->l_granted_mode);
2383         lustre_swab_ldlm_policy_data (&l->l_policy_data);
2384 }
2385
2386 void lustre_swab_ldlm_request (struct ldlm_request *rq)
2387 {
2388         __swab32s (&rq->lock_flags);
2389         lustre_swab_ldlm_lock_desc (&rq->lock_desc);
2390         __swab32s (&rq->lock_count);
2391         /* lock_handle[] opaque */
2392 }
2393
2394 void lustre_swab_ldlm_reply (struct ldlm_reply *r)
2395 {
2396         __swab32s (&r->lock_flags);
2397         CLASSERT(offsetof(typeof(*r), lock_padding) != 0);
2398         lustre_swab_ldlm_lock_desc (&r->lock_desc);
2399         /* lock_handle opaque */
2400         __swab64s (&r->lock_policy_res1);
2401         __swab64s (&r->lock_policy_res2);
2402 }
2403
2404 void lustre_swab_quota_body(struct quota_body *b)
2405 {
2406         lustre_swab_lu_fid(&b->qb_fid);
2407         lustre_swab_lu_fid((struct lu_fid *)&b->qb_id);
2408         __swab32s(&b->qb_flags);
2409         __swab64s(&b->qb_count);
2410         __swab64s(&b->qb_usage);
2411         __swab64s(&b->qb_slv_ver);
2412 }
2413
2414 /* Dump functions */
2415 void dump_ioo(struct obd_ioobj *ioo)
2416 {
2417         CDEBUG(D_RPCTRACE,
2418                "obd_ioobj: ioo_oid="DOSTID", ioo_max_brw=%#x, "
2419                "ioo_bufct=%d\n", POSTID(&ioo->ioo_oid), ioo->ioo_max_brw,
2420                ioo->ioo_bufcnt);
2421 }
2422
2423 void dump_rniobuf(struct niobuf_remote *nb)
2424 {
2425         CDEBUG(D_RPCTRACE, "niobuf_remote: offset=%llu, len=%d, flags=%x\n",
2426                nb->rnb_offset, nb->rnb_len, nb->rnb_flags);
2427 }
2428
2429 void dump_obdo(struct obdo *oa)
2430 {
2431         u64 valid = oa->o_valid;
2432
2433         CDEBUG(D_RPCTRACE, "obdo: o_valid = %#llx\n", valid);
2434         if (valid & OBD_MD_FLID)
2435                 CDEBUG(D_RPCTRACE, "obdo: id = "DOSTID"\n", POSTID(&oa->o_oi));
2436         if (valid & OBD_MD_FLFID)
2437                 CDEBUG(D_RPCTRACE, "obdo: o_parent_seq = %#llx\n",
2438                        oa->o_parent_seq);
2439         if (valid & OBD_MD_FLSIZE)
2440                 CDEBUG(D_RPCTRACE, "obdo: o_size = %lld\n", oa->o_size);
2441         if (valid & OBD_MD_FLMTIME)
2442                 CDEBUG(D_RPCTRACE, "obdo: o_mtime = %lld\n", oa->o_mtime);
2443         if (valid & OBD_MD_FLATIME)
2444                 CDEBUG(D_RPCTRACE, "obdo: o_atime = %lld\n", oa->o_atime);
2445         if (valid & OBD_MD_FLCTIME)
2446                 CDEBUG(D_RPCTRACE, "obdo: o_ctime = %lld\n", oa->o_ctime);
2447         if (valid & OBD_MD_FLBLOCKS)   /* allocation of space */
2448                 CDEBUG(D_RPCTRACE, "obdo: o_blocks = %lld\n", oa->o_blocks);
2449         if (valid & OBD_MD_FLGRANT)
2450                 CDEBUG(D_RPCTRACE, "obdo: o_grant = %lld\n", oa->o_grant);
2451         if (valid & OBD_MD_FLBLKSZ)
2452                 CDEBUG(D_RPCTRACE, "obdo: o_blksize = %d\n", oa->o_blksize);
2453         if (valid & (OBD_MD_FLTYPE | OBD_MD_FLMODE))
2454                 CDEBUG(D_RPCTRACE, "obdo: o_mode = %o\n",
2455                        oa->o_mode & ((valid & OBD_MD_FLTYPE ?  S_IFMT : 0) |
2456                                      (valid & OBD_MD_FLMODE ? ~S_IFMT : 0)));
2457         if (valid & OBD_MD_FLUID)
2458                 CDEBUG(D_RPCTRACE, "obdo: o_uid = %u\n", oa->o_uid);
2459         if (valid & OBD_MD_FLUID)
2460                 CDEBUG(D_RPCTRACE, "obdo: o_uid_h = %u\n", oa->o_uid_h);
2461         if (valid & OBD_MD_FLGID)
2462                 CDEBUG(D_RPCTRACE, "obdo: o_gid = %u\n", oa->o_gid);
2463         if (valid & OBD_MD_FLGID)
2464                 CDEBUG(D_RPCTRACE, "obdo: o_gid_h = %u\n", oa->o_gid_h);
2465         if (valid & OBD_MD_FLFLAGS)
2466                 CDEBUG(D_RPCTRACE, "obdo: o_flags = %x\n", oa->o_flags);
2467         if (valid & OBD_MD_FLNLINK)
2468                 CDEBUG(D_RPCTRACE, "obdo: o_nlink = %u\n", oa->o_nlink);
2469         else if (valid & OBD_MD_FLCKSUM)
2470                 CDEBUG(D_RPCTRACE, "obdo: o_checksum (o_nlink) = %u\n",
2471                        oa->o_nlink);
2472         if (valid & OBD_MD_FLGENER)
2473                 CDEBUG(D_RPCTRACE, "obdo: o_parent_oid = %x\n",
2474                        oa->o_parent_oid);
2475         if (valid & OBD_MD_FLEPOCH)
2476                 CDEBUG(D_RPCTRACE, "obdo: o_ioepoch = %lld\n",
2477                        oa->o_ioepoch);
2478         if (valid & OBD_MD_FLFID) {
2479                 CDEBUG(D_RPCTRACE, "obdo: o_stripe_idx = %u\n",
2480                        oa->o_stripe_idx);
2481                 CDEBUG(D_RPCTRACE, "obdo: o_parent_ver = %x\n",
2482                        oa->o_parent_ver);
2483         }
2484         if (valid & OBD_MD_FLHANDLE)
2485                 CDEBUG(D_RPCTRACE, "obdo: o_handle = %lld\n",
2486                        oa->o_handle.cookie);
2487 }
2488
2489 void dump_ost_body(struct ost_body *ob)
2490 {
2491         dump_obdo(&ob->oa);
2492 }
2493
2494 void dump_rcs(__u32 *rc)
2495 {
2496         CDEBUG(D_RPCTRACE, "rmf_rcs: %d\n", *rc);
2497 }
2498
2499 static inline int req_ptlrpc_body_swabbed(struct ptlrpc_request *req)
2500 {
2501         LASSERT(req->rq_reqmsg);
2502
2503         switch (req->rq_reqmsg->lm_magic) {
2504         case LUSTRE_MSG_MAGIC_V2:
2505                 return lustre_req_swabbed(req, MSG_PTLRPC_BODY_OFF);
2506         default:
2507                 CERROR("bad lustre msg magic: %#08X\n",
2508                        req->rq_reqmsg->lm_magic);
2509         }
2510         return 0;
2511 }
2512
2513 static inline int rep_ptlrpc_body_swabbed(struct ptlrpc_request *req)
2514 {
2515         if (unlikely(!req->rq_repmsg))
2516                 return 0;
2517
2518         switch (req->rq_repmsg->lm_magic) {
2519         case LUSTRE_MSG_MAGIC_V2:
2520                 return lustre_rep_swabbed(req, MSG_PTLRPC_BODY_OFF);
2521         default:
2522                 /* uninitialized yet */
2523                 return 0;
2524         }
2525 }
2526
2527 void _debug_req(struct ptlrpc_request *req,
2528                 struct libcfs_debug_msg_data *msgdata, const char *fmt, ...)
2529 {
2530         bool req_ok = req->rq_reqmsg != NULL;
2531         bool rep_ok = false;
2532         lnet_nid_t nid = LNET_NID_ANY;
2533         va_list args;
2534         int rep_flags = -1;
2535         int rep_status = -1;
2536
2537         spin_lock(&req->rq_early_free_lock);
2538         if (req->rq_repmsg)
2539                 rep_ok = true;
2540
2541         if (ptlrpc_req_need_swab(req)) {
2542                 req_ok = req_ok && req_ptlrpc_body_swabbed(req);
2543                 rep_ok = rep_ok && rep_ptlrpc_body_swabbed(req);
2544         }
2545
2546         if (rep_ok) {
2547                 rep_flags = lustre_msg_get_flags(req->rq_repmsg);
2548                 rep_status = lustre_msg_get_status(req->rq_repmsg);
2549         }
2550         spin_unlock(&req->rq_early_free_lock);
2551
2552         if (req->rq_import && req->rq_import->imp_connection)
2553                 nid = req->rq_import->imp_connection->c_peer.nid;
2554         else if (req->rq_export && req->rq_export->exp_connection)
2555                 nid = req->rq_export->exp_connection->c_peer.nid;
2556
2557         va_start(args, fmt);
2558         libcfs_debug_vmsg2(msgdata, fmt, args,
2559                            " req@%p x%llu/t%lld(%lld) 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\n",
2560                            req, req->rq_xid, req->rq_transno,
2561                            req_ok ? lustre_msg_get_transno(req->rq_reqmsg) : 0,
2562                            req_ok ? lustre_msg_get_opc(req->rq_reqmsg) : -1,
2563                            req->rq_import ?
2564                                 req->rq_import->imp_obd->obd_name :
2565                                 req->rq_export ?
2566                                         req->rq_export->exp_client_uuid.uuid :
2567                                         "<?>",
2568                            libcfs_nid2str(nid),
2569                            req->rq_request_portal, req->rq_reply_portal,
2570                            req->rq_reqlen, req->rq_replen,
2571                            req->rq_early_count, (s64)req->rq_timedout,
2572                            (s64)req->rq_deadline,
2573                            atomic_read(&req->rq_refcount),
2574                            DEBUG_REQ_FLAGS(req),
2575                            req_ok ? lustre_msg_get_flags(req->rq_reqmsg) : -1,
2576                            rep_flags, req->rq_status, rep_status);
2577         va_end(args);
2578 }
2579 EXPORT_SYMBOL(_debug_req);
2580
2581 void lustre_swab_lustre_capa(struct lustre_capa *c)
2582 {
2583         lustre_swab_lu_fid(&c->lc_fid);
2584         __swab64s (&c->lc_opc);
2585         __swab64s (&c->lc_uid);
2586         __swab64s (&c->lc_gid);
2587         __swab32s (&c->lc_flags);
2588         __swab32s (&c->lc_keyid);
2589         __swab32s (&c->lc_timeout);
2590         __swab32s (&c->lc_expiry);
2591 }
2592
2593 void lustre_swab_lustre_capa_key(struct lustre_capa_key *k)
2594 {
2595         __swab64s (&k->lk_seq);
2596         __swab32s (&k->lk_keyid);
2597         CLASSERT(offsetof(typeof(*k), lk_padding) != 0);
2598 }
2599
2600 void lustre_swab_hsm_user_state(struct hsm_user_state *state)
2601 {
2602         __swab32s(&state->hus_states);
2603         __swab32s(&state->hus_archive_id);
2604 }
2605
2606 void lustre_swab_hsm_state_set(struct hsm_state_set *hss)
2607 {
2608         __swab32s(&hss->hss_valid);
2609         __swab64s(&hss->hss_setmask);
2610         __swab64s(&hss->hss_clearmask);
2611         __swab32s(&hss->hss_archive_id);
2612 }
2613
2614 static void lustre_swab_hsm_extent(struct hsm_extent *extent)
2615 {
2616         __swab64s(&extent->offset);
2617         __swab64s(&extent->length);
2618 }
2619
2620 void lustre_swab_hsm_current_action(struct hsm_current_action *action)
2621 {
2622         __swab32s(&action->hca_state);
2623         __swab32s(&action->hca_action);
2624         lustre_swab_hsm_extent(&action->hca_location);
2625 }
2626
2627 void lustre_swab_hsm_user_item(struct hsm_user_item *hui)
2628 {
2629         lustre_swab_lu_fid(&hui->hui_fid);
2630         lustre_swab_hsm_extent(&hui->hui_extent);
2631 }
2632
2633 void lustre_swab_lu_extent(struct lu_extent *le)
2634 {
2635         __swab64s(&le->e_start);
2636         __swab64s(&le->e_end);
2637 }
2638
2639 void lustre_swab_layout_intent(struct layout_intent *li)
2640 {
2641         __swab32s(&li->li_opc);
2642         __swab32s(&li->li_flags);
2643         lustre_swab_lu_extent(&li->li_extent);
2644 }
2645
2646 void lustre_swab_hsm_progress_kernel(struct hsm_progress_kernel *hpk)
2647 {
2648         lustre_swab_lu_fid(&hpk->hpk_fid);
2649         __swab64s(&hpk->hpk_cookie);
2650         __swab64s(&hpk->hpk_extent.offset);
2651         __swab64s(&hpk->hpk_extent.length);
2652         __swab16s(&hpk->hpk_flags);
2653         __swab16s(&hpk->hpk_errval);
2654 }
2655
2656 void lustre_swab_hsm_request(struct hsm_request *hr)
2657 {
2658         __swab32s(&hr->hr_action);
2659         __swab32s(&hr->hr_archive_id);
2660         __swab64s(&hr->hr_flags);
2661         __swab32s(&hr->hr_itemcount);
2662         __swab32s(&hr->hr_data_len);
2663 }
2664
2665 void lustre_swab_object_update(struct object_update *ou)
2666 {
2667         struct object_update_param *param;
2668         size_t  i;
2669
2670         __swab16s(&ou->ou_type);
2671         __swab16s(&ou->ou_params_count);
2672         __swab32s(&ou->ou_result_size);
2673         __swab32s(&ou->ou_flags);
2674         __swab32s(&ou->ou_padding1);
2675         __swab64s(&ou->ou_batchid);
2676         lustre_swab_lu_fid(&ou->ou_fid);
2677         param = &ou->ou_params[0];
2678         for (i = 0; i < ou->ou_params_count; i++) {
2679                 __swab16s(&param->oup_len);
2680                 __swab16s(&param->oup_padding);
2681                 __swab32s(&param->oup_padding2);
2682                 param = (struct object_update_param *)((char *)param +
2683                          object_update_param_size(param));
2684         }
2685 }
2686
2687 void lustre_swab_object_update_request(struct object_update_request *our)
2688 {
2689         size_t i;
2690         __swab32s(&our->ourq_magic);
2691         __swab16s(&our->ourq_count);
2692         __swab16s(&our->ourq_padding);
2693         for (i = 0; i < our->ourq_count; i++) {
2694                 struct object_update *ou;
2695
2696                 ou = object_update_request_get(our, i, NULL);
2697                 if (ou == NULL)
2698                         return;
2699                 lustre_swab_object_update(ou);
2700         }
2701 }
2702
2703 void lustre_swab_object_update_result(struct object_update_result *our)
2704 {
2705         __swab32s(&our->our_rc);
2706         __swab16s(&our->our_datalen);
2707         __swab16s(&our->our_padding);
2708 }
2709
2710 void lustre_swab_object_update_reply(struct object_update_reply *our)
2711 {
2712         size_t i;
2713
2714         __swab32s(&our->ourp_magic);
2715         __swab16s(&our->ourp_count);
2716         __swab16s(&our->ourp_padding);
2717         for (i = 0; i < our->ourp_count; i++) {
2718                 struct object_update_result *ourp;
2719
2720                 __swab16s(&our->ourp_lens[i]);
2721                 ourp = object_update_result_get(our, i, NULL);
2722                 if (ourp == NULL)
2723                         return;
2724                 lustre_swab_object_update_result(ourp);
2725         }
2726 }
2727
2728 void lustre_swab_out_update_header(struct out_update_header *ouh)
2729 {
2730         __swab32s(&ouh->ouh_magic);
2731         __swab32s(&ouh->ouh_count);
2732         __swab32s(&ouh->ouh_inline_length);
2733         __swab32s(&ouh->ouh_reply_size);
2734 }
2735 EXPORT_SYMBOL(lustre_swab_out_update_header);
2736
2737 void lustre_swab_out_update_buffer(struct out_update_buffer *oub)
2738 {
2739         __swab32s(&oub->oub_size);
2740         __swab32s(&oub->oub_padding);
2741 }
2742 EXPORT_SYMBOL(lustre_swab_out_update_buffer);
2743
2744 void lustre_swab_swap_layouts(struct mdc_swap_layouts *msl)
2745 {
2746         __swab64s(&msl->msl_flags);
2747 }
2748
2749 void lustre_swab_close_data(struct close_data *cd)
2750 {
2751         lustre_swab_lu_fid(&cd->cd_fid);
2752         __swab64s(&cd->cd_data_version);
2753 }
2754
2755 void lustre_swab_lfsck_request(struct lfsck_request *lr)
2756 {
2757         __swab32s(&lr->lr_event);
2758         __swab32s(&lr->lr_index);
2759         __swab32s(&lr->lr_flags);
2760         __swab32s(&lr->lr_valid);
2761         __swab32s(&lr->lr_speed);
2762         __swab16s(&lr->lr_version);
2763         __swab16s(&lr->lr_active);
2764         __swab16s(&lr->lr_param);
2765         __swab16s(&lr->lr_async_windows);
2766         __swab32s(&lr->lr_flags);
2767         lustre_swab_lu_fid(&lr->lr_fid);
2768         lustre_swab_lu_fid(&lr->lr_fid2);
2769         __swab32s(&lr->lr_comp_id);
2770         CLASSERT(offsetof(typeof(*lr), lr_padding_0) != 0);
2771         CLASSERT(offsetof(typeof(*lr), lr_padding_1) != 0);
2772         CLASSERT(offsetof(typeof(*lr), lr_padding_2) != 0);
2773         CLASSERT(offsetof(typeof(*lr), lr_padding_3) != 0);
2774 }
2775
2776 void lustre_swab_lfsck_reply(struct lfsck_reply *lr)
2777 {
2778         __swab32s(&lr->lr_status);
2779         CLASSERT(offsetof(typeof(*lr), lr_padding_1) != 0);
2780         __swab64s(&lr->lr_repaired);
2781 }
2782
2783 static void lustre_swab_orphan_rec(struct lu_orphan_rec *rec)
2784 {
2785         lustre_swab_lu_fid(&rec->lor_fid);
2786         __swab32s(&rec->lor_uid);
2787         __swab32s(&rec->lor_gid);
2788 }
2789
2790 void lustre_swab_orphan_ent(struct lu_orphan_ent *ent)
2791 {
2792         lustre_swab_lu_fid(&ent->loe_key);
2793         lustre_swab_orphan_rec(&ent->loe_rec);
2794 }
2795 EXPORT_SYMBOL(lustre_swab_orphan_ent);
2796
2797 void lustre_swab_orphan_ent_v2(struct lu_orphan_ent_v2 *ent)
2798 {
2799         lustre_swab_lu_fid(&ent->loe_key);
2800         lustre_swab_orphan_rec(&ent->loe_rec.lor_rec);
2801         lustre_swab_ost_layout(&ent->loe_rec.lor_layout);
2802         CLASSERT(offsetof(typeof(ent->loe_rec), lor_padding) != 0);
2803 }
2804 EXPORT_SYMBOL(lustre_swab_orphan_ent_v2);
2805
2806 void lustre_swab_ladvise(struct lu_ladvise *ladvise)
2807 {
2808         __swab16s(&ladvise->lla_advice);
2809         __swab16s(&ladvise->lla_value1);
2810         __swab32s(&ladvise->lla_value2);
2811         __swab64s(&ladvise->lla_start);
2812         __swab64s(&ladvise->lla_end);
2813         __swab32s(&ladvise->lla_value3);
2814         __swab32s(&ladvise->lla_value4);
2815 }
2816 EXPORT_SYMBOL(lustre_swab_ladvise);
2817
2818 void lustre_swab_ladvise_hdr(struct ladvise_hdr *ladvise_hdr)
2819 {
2820         __swab32s(&ladvise_hdr->lah_magic);
2821         __swab32s(&ladvise_hdr->lah_count);
2822         __swab64s(&ladvise_hdr->lah_flags);
2823         __swab32s(&ladvise_hdr->lah_value1);
2824         __swab32s(&ladvise_hdr->lah_value2);
2825         __swab64s(&ladvise_hdr->lah_value3);
2826 }
2827 EXPORT_SYMBOL(lustre_swab_ladvise_hdr);