lnet/selftest/brw_test.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lnet/selftest/brw_test.c
  37  *
  38  * Author: Isaac Huang <isaac@clusterfs.com>
  39  */
  40
  41 #include "selftest.h"
  42
  43 static int brw_srv_workitems = SFW_TEST_WI_MAX;
  44 CFS_MODULE_PARM(brw_srv_workitems, "i", int, 0644, "# BRW server workitems");
  45
  46 static int brw_inject_errors;
  47 CFS_MODULE_PARM(brw_inject_errors, "i", int, 0644,
  48                 "# data errors to inject randomly, zero by default");
  49
  50 static void
  51 brw_client_fini (sfw_test_instance_t *tsi)
  52 {
  53         srpc_bulk_t     *bulk;
  54         sfw_test_unit_t *tsu;
  55
  56         LASSERT(tsi->tsi_is_client);
  57
  58         list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
  59                 bulk = tsu->tsu_private;
  60                 if (bulk == NULL)
  61                         continue;
  62
  63                 srpc_free_bulk(bulk);
  64                 tsu->tsu_private = NULL;
  65         }
  66 }
  67
  68 int
  69 brw_client_init (sfw_test_instance_t *tsi)
  70 {
  71         sfw_session_t    *sn = tsi->tsi_batch->bat_session;
  72         int               flags;
  73         int               npg;
  74         int               len;
  75         int               opc;
  76         srpc_bulk_t      *bulk;
  77         sfw_test_unit_t  *tsu;
  78
  79         LASSERT(sn != NULL);
  80         LASSERT(tsi->tsi_is_client);
  81
  82         if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
  83                 test_bulk_req_t  *breq = &tsi->tsi_u.bulk_v0;
  84
  85                 opc   = breq->blk_opc;
  86                 flags = breq->blk_flags;
  87                 npg   = breq->blk_npg;
  88                 /* NB: this is not going to work for variable page size,
  89                  * but we have to keep it for compatibility */
  90                 len   = npg * PAGE_CACHE_SIZE;
  91
  92         } else {
  93                 test_bulk_req_v1_t  *breq = &tsi->tsi_u.bulk_v1;
  94
  95                 /* I should never get this step if it's unknown feature
  96                  * because make_session will reject unknown feature */
  97                 LASSERT((sn->sn_features & ~LST_FEATS_MASK) == 0);
  98
  99                 opc   = breq->blk_opc;
 100                 flags = breq->blk_flags;
 101                 len   = breq->blk_len;
 102                 npg   = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 103         }
 104
 105         if (npg > LNET_MAX_IOV || npg <= 0)
 106                 return -EINVAL;
 107
 108         if (opc != LST_BRW_READ && opc != LST_BRW_WRITE)
 109                 return -EINVAL;
 110
 111         if (flags != LST_BRW_CHECK_NONE &&
 112             flags != LST_BRW_CHECK_FULL && flags != LST_BRW_CHECK_SIMPLE)
 113                 return -EINVAL;
 114
 115         list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
 116                 bulk = srpc_alloc_bulk(lnet_cpt_of_nid(tsu->tsu_dest.nid),
 117                                        npg, len, opc == LST_BRW_READ);
 118                 if (bulk == NULL) {
 119                         brw_client_fini(tsi);
 120                         return -ENOMEM;
 121                 }
 122
 123                 tsu->tsu_private = bulk;
 124         }
 125
 126         return 0;
 127 }
 128
 129 #define BRW_POISON      0xbeefbeefbeefbeefULL
 130 #define BRW_MAGIC       0xeeb0eeb1eeb2eeb3ULL
 131 #define BRW_MSIZE       sizeof(__u64)
 132
 133 int brw_inject_one_error (void)
 134 {
 135         struct timeval tv;
 136
 137         if (brw_inject_errors <= 0) return 0;
 138
 139 #ifndef __KERNEL__
 140         gettimeofday(&tv, NULL);
 141 #else
 142         do_gettimeofday(&tv);
 143 #endif
 144
 145         if ((tv.tv_usec & 1) == 0) return 0;
 146
 147         return brw_inject_errors--;
 148 }
 149
 150 void
 151 brw_fill_page (struct page *pg, int pattern, __u64 magic)
 152 {
 153         char *addr = page_address(pg);
 154         int   i;
 155
 156         LASSERT (addr != NULL);
 157
 158         if (pattern == LST_BRW_CHECK_NONE) return;
 159
 160         if (magic == BRW_MAGIC)
 161                 magic += brw_inject_one_error();
 162
 163         if (pattern == LST_BRW_CHECK_SIMPLE) {
 164                 memcpy(addr, &magic, BRW_MSIZE);
 165                 addr += PAGE_CACHE_SIZE - BRW_MSIZE;
 166                 memcpy(addr, &magic, BRW_MSIZE);
 167                 return;
 168         }
 169
 170         if (pattern == LST_BRW_CHECK_FULL) {
 171                 for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++)
 172                         memcpy(addr + i * BRW_MSIZE, &magic, BRW_MSIZE);
 173                 return;
 174         }
 175
 176         LBUG ();
 177         return;
 178 }
 179
 180 int
 181 brw_check_page (struct page *pg, int pattern, __u64 magic)
 182 {
 183         char  *addr = page_address(pg);
 184         __u64  data = 0; /* make compiler happy */
 185         int    i;
 186
 187         LASSERT (addr != NULL);
 188
 189         if (pattern == LST_BRW_CHECK_NONE)
 190                 return 0;
 191
 192         if (pattern == LST_BRW_CHECK_SIMPLE) {
 193                 data = *((__u64 *) addr);
 194                 if (data != magic) goto bad_data;
 195
 196                 addr += PAGE_CACHE_SIZE - BRW_MSIZE;
 197                 data = *((__u64 *) addr);
 198                 if (data != magic) goto bad_data;
 199
 200                 return 0;
 201         }
 202
 203         if (pattern == LST_BRW_CHECK_FULL) {
 204                 for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++) {
 205                         data = *(((__u64 *) addr) + i);
 206                         if (data != magic) goto bad_data;
 207                 }
 208
 209                 return 0;
 210         }
 211
 212         LBUG ();
 213
 214 bad_data:
 215         CERROR ("Bad data in page %p: "LPX64", "LPX64" expected\n",
 216                 pg, data, magic);
 217         return 1;
 218 }
 219
 220 void
 221 brw_fill_bulk (srpc_bulk_t *bk, int pattern, __u64 magic)
 222 {
 223         int         i;
 224         struct page *pg;
 225
 226         for (i = 0; i < bk->bk_niov; i++) {
 227 #ifdef __KERNEL__
 228                 pg = bk->bk_iovs[i].kiov_page;
 229 #else
 230                 LASSERT (bk->bk_pages != NULL);
 231                 pg = bk->bk_pages[i];
 232 #endif
 233                 brw_fill_page(pg, pattern, magic);
 234         }
 235 }
 236
 237 int
 238 brw_check_bulk (srpc_bulk_t *bk, int pattern, __u64 magic)
 239 {
 240         int         i;
 241         struct page *pg;
 242
 243         for (i = 0; i < bk->bk_niov; i++) {
 244 #ifdef __KERNEL__
 245                 pg = bk->bk_iovs[i].kiov_page;
 246 #else
 247                 LASSERT (bk->bk_pages != NULL);
 248                 pg = bk->bk_pages[i];
 249 #endif
 250                 if (brw_check_page(pg, pattern, magic) != 0) {
 251                         CERROR ("Bulk page %p (%d/%d) is corrupted!\n",
 252                                 pg, i, bk->bk_niov);
 253                         return 1;
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int
 261 brw_client_prep_rpc (sfw_test_unit_t *tsu,
 262                      lnet_process_id_t dest, srpc_client_rpc_t **rpcpp)
 263 {
 264         srpc_bulk_t         *bulk = tsu->tsu_private;
 265         sfw_test_instance_t *tsi = tsu->tsu_instance;
 266         sfw_session_t       *sn = tsi->tsi_batch->bat_session;
 267         srpc_client_rpc_t   *rpc;
 268         srpc_brw_reqst_t    *req;
 269         int                  flags;
 270         int                  npg;
 271         int                  len;
 272         int                  opc;
 273         int                  rc;
 274
 275         LASSERT(sn != NULL);
 276         LASSERT(bulk != NULL);
 277
 278         if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
 279                 test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;
 280
 281                 opc   = breq->blk_opc;
 282                 flags = breq->blk_flags;
 283                 npg   = breq->blk_npg;
 284                 len   = npg * PAGE_CACHE_SIZE;
 285
 286         } else {
 287                 test_bulk_req_v1_t  *breq = &tsi->tsi_u.bulk_v1;
 288
 289                 /* I should never get this step if it's unknown feature
 290                  * because make_session will reject unknown feature */
 291                 LASSERT((sn->sn_features & ~LST_FEATS_MASK) == 0);
 292
 293                 opc   = breq->blk_opc;
 294                 flags = breq->blk_flags;
 295                 len   = breq->blk_len;
 296                 npg   = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 297         }
 298
 299         rc = sfw_create_test_rpc(tsu, dest, sn->sn_features, npg, len, &rpc);
 300         if (rc != 0)
 301                 return rc;
 302
 303         memcpy(&rpc->crpc_bulk, bulk, offsetof(srpc_bulk_t, bk_iovs[npg]));
 304         if (opc == LST_BRW_WRITE)
 305                 brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_MAGIC);
 306         else
 307                 brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_POISON);
 308
 309         req = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
 310         req->brw_flags = flags;
 311         req->brw_rw    = opc;
 312         req->brw_len   = len;
 313
 314         *rpcpp = rpc;
 315         return 0;
 316 }
 317
 318 static void
 319 brw_client_done_rpc (sfw_test_unit_t *tsu, srpc_client_rpc_t *rpc)
 320 {
 321         __u64                magic = BRW_MAGIC;
 322         sfw_test_instance_t *tsi = tsu->tsu_instance;
 323         sfw_session_t       *sn = tsi->tsi_batch->bat_session;
 324         srpc_msg_t          *msg = &rpc->crpc_replymsg;
 325         srpc_brw_reply_t    *reply = &msg->msg_body.brw_reply;
 326         srpc_brw_reqst_t    *reqst = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
 327
 328         LASSERT (sn != NULL);
 329
 330         if (rpc->crpc_status != 0) {
 331                 CERROR ("BRW RPC to %s failed with %d\n",
 332                         libcfs_id2str(rpc->crpc_dest), rpc->crpc_status);
 333                 if (!tsi->tsi_stopping) /* rpc could have been aborted */
 334                         atomic_inc(&sn->sn_brw_errors);
 335                 goto out;
 336         }
 337
 338         if (msg->msg_magic != SRPC_MSG_MAGIC) {
 339                 __swab64s(&magic);
 340                 __swab32s(&reply->brw_status);
 341         }
 342
 343         CDEBUG (reply->brw_status ? D_WARNING : D_NET,
 344                 "BRW RPC to %s finished with brw_status: %d\n",
 345                 libcfs_id2str(rpc->crpc_dest), reply->brw_status);
 346
 347         if (reply->brw_status != 0) {
 348                 atomic_inc(&sn->sn_brw_errors);
 349                 rpc->crpc_status = -(int)reply->brw_status;
 350                 goto out;
 351         }
 352
 353         if (reqst->brw_rw == LST_BRW_WRITE) goto out;
 354
 355         if (brw_check_bulk(&rpc->crpc_bulk, reqst->brw_flags, magic) != 0) {
 356                 CERROR ("Bulk data from %s is corrupted!\n",
 357                         libcfs_id2str(rpc->crpc_dest));
 358                 atomic_inc(&sn->sn_brw_errors);
 359                 rpc->crpc_status = -EBADMSG;
 360         }
 361
 362 out:
 363 #ifndef __KERNEL__
 364         rpc->crpc_bulk.bk_pages = NULL;
 365 #endif
 366         return;
 367 }
 368
 369 void
 370 brw_server_rpc_done (srpc_server_rpc_t *rpc)
 371 {
 372         srpc_bulk_t *blk = rpc->srpc_bulk;
 373
 374         if (blk == NULL) return;
 375
 376         if (rpc->srpc_status != 0)
 377                 CERROR ("Bulk transfer %s %s has failed: %d\n",
 378                         blk->bk_sink ? "from" : "to",
 379                         libcfs_id2str(rpc->srpc_peer), rpc->srpc_status);
 380         else
 381                 CDEBUG (D_NET, "Transfered %d pages bulk data %s %s\n",
 382                         blk->bk_niov, blk->bk_sink ? "from" : "to",
 383                         libcfs_id2str(rpc->srpc_peer));
 384
 385         sfw_free_pages(rpc);
 386 }
 387
 388 int
 389 brw_bulk_ready (srpc_server_rpc_t *rpc, int status)
 390 {
 391         __u64             magic = BRW_MAGIC;
 392         srpc_brw_reply_t *reply = &rpc->srpc_replymsg.msg_body.brw_reply;
 393         srpc_brw_reqst_t *reqst;
 394         srpc_msg_t       *reqstmsg;
 395
 396         LASSERT (rpc->srpc_bulk != NULL);
 397         LASSERT (rpc->srpc_reqstbuf != NULL);
 398
 399         reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
 400         reqst = &reqstmsg->msg_body.brw_reqst;
 401
 402         if (status != 0) {
 403                 CERROR ("BRW bulk %s failed for RPC from %s: %d\n",
 404                         reqst->brw_rw == LST_BRW_READ ? "READ" : "WRITE",
 405                         libcfs_id2str(rpc->srpc_peer), status);
 406                 return -EIO;
 407         }
 408
 409         if (reqst->brw_rw == LST_BRW_READ)
 410                 return 0;
 411
 412         if (reqstmsg->msg_magic != SRPC_MSG_MAGIC)
 413                 __swab64s(&magic);
 414
 415         if (brw_check_bulk(rpc->srpc_bulk, reqst->brw_flags, magic) != 0) {
 416                 CERROR ("Bulk data from %s is corrupted!\n",
 417                         libcfs_id2str(rpc->srpc_peer));
 418                 reply->brw_status = EBADMSG;
 419         }
 420
 421         return 0;
 422 }
 423
 424 int
 425 brw_server_handle(struct srpc_server_rpc *rpc)
 426 {
 427         struct srpc_service     *sv = rpc->srpc_scd->scd_svc;
 428         srpc_msg_t       *replymsg = &rpc->srpc_replymsg;
 429         srpc_msg_t       *reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
 430         srpc_brw_reply_t *reply = &replymsg->msg_body.brw_reply;
 431         srpc_brw_reqst_t *reqst = &reqstmsg->msg_body.brw_reqst;
 432         int               npg;
 433         int               rc;
 434
 435         LASSERT (sv->sv_id == SRPC_SERVICE_BRW);
 436
 437         if (reqstmsg->msg_magic != SRPC_MSG_MAGIC) {
 438                 LASSERT (reqstmsg->msg_magic == __swab32(SRPC_MSG_MAGIC));
 439
 440                 __swab32s(&reqst->brw_rw);
 441                 __swab32s(&reqst->brw_len);
 442                 __swab32s(&reqst->brw_flags);
 443                 __swab64s(&reqst->brw_rpyid);
 444                 __swab64s(&reqst->brw_bulkid);
 445         }
 446         LASSERT (reqstmsg->msg_type == (__u32)srpc_service2request(sv->sv_id));
 447
 448         reply->brw_status = 0;
 449         rpc->srpc_done = brw_server_rpc_done;
 450
 451         if ((reqst->brw_rw != LST_BRW_READ && reqst->brw_rw != LST_BRW_WRITE) ||
 452             (reqst->brw_flags != LST_BRW_CHECK_NONE &&
 453              reqst->brw_flags != LST_BRW_CHECK_FULL &&
 454              reqst->brw_flags != LST_BRW_CHECK_SIMPLE)) {
 455                 reply->brw_status = EINVAL;
 456                 return 0;
 457         }
 458
 459         if ((reqstmsg->msg_ses_feats & ~LST_FEATS_MASK) != 0) {
 460                 replymsg->msg_ses_feats = LST_FEATS_MASK;
 461                 reply->brw_status = EPROTO;
 462                 return 0;
 463         }
 464
 465         if ((reqstmsg->msg_ses_feats & LST_FEAT_BULK_LEN) == 0) {
 466                 /* compat with old version */
 467                 if ((reqst->brw_len & ~CFS_PAGE_MASK) != 0) {
 468                         reply->brw_status = EINVAL;
 469                         return 0;
 470                 }
 471                 npg = reqst->brw_len >> PAGE_CACHE_SHIFT;
 472
 473         } else {
 474                 npg = (reqst->brw_len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 475         }
 476
 477         replymsg->msg_ses_feats = reqstmsg->msg_ses_feats;
 478
 479         if (reqst->brw_len == 0 || npg > LNET_MAX_IOV) {
 480                 reply->brw_status = EINVAL;
 481                 return 0;
 482         }
 483
 484         rc = sfw_alloc_pages(rpc, rpc->srpc_scd->scd_cpt, npg,
 485                              reqst->brw_len,
 486                              reqst->brw_rw == LST_BRW_WRITE);
 487         if (rc != 0)
 488                 return rc;
 489
 490         if (reqst->brw_rw == LST_BRW_READ)
 491                 brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_MAGIC);
 492         else
 493                 brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_POISON);
 494
 495         return 0;
 496 }
 497
 498 sfw_test_client_ops_t brw_test_client;
 499 void brw_init_test_client(void)
 500 {
 501         brw_test_client.tso_init       = brw_client_init;
 502         brw_test_client.tso_fini       = brw_client_fini;
 503         brw_test_client.tso_prep_rpc   = brw_client_prep_rpc;
 504         brw_test_client.tso_done_rpc   = brw_client_done_rpc;
 505 };
 506
 507 srpc_service_t brw_test_service;
 508 void brw_init_test_service(void)
 509 {
 510 #ifndef __KERNEL__
 511         char *s;
 512
 513         s = getenv("BRW_INJECT_ERRORS");
 514         brw_inject_errors = s != NULL ? atoi(s) : brw_inject_errors;
 515 #endif
 516
 517         brw_test_service.sv_id         = SRPC_SERVICE_BRW;
 518         brw_test_service.sv_name       = "brw_test";
 519         brw_test_service.sv_handler    = brw_server_handle;
 520         brw_test_service.sv_bulk_ready = brw_bulk_ready;
 521         brw_test_service.sv_wi_total   = brw_srv_workitems;
 522 }