g_nop.c revision 289520
1/*- 2 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/10/sys/geom/nop/g_nop.c 289520 2015-10-18 15:02:07Z trasz $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/lock.h> 35#include <sys/mutex.h> 36#include <sys/bio.h> 37#include <sys/sbuf.h> 38#include <sys/sysctl.h> 39#include <sys/malloc.h> 40#include <geom/geom.h> 41#include <geom/nop/g_nop.h> 42 43 44SYSCTL_DECL(_kern_geom); 45static SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW, 0, "GEOM_NOP stuff"); 46static u_int g_nop_debug = 0; 47SYSCTL_UINT(_kern_geom_nop, OID_AUTO, debug, CTLFLAG_RW, &g_nop_debug, 0, 48 "Debug level"); 49 50static int g_nop_destroy(struct g_geom *gp, boolean_t force); 51static int g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, 52 struct g_geom *gp); 53static void g_nop_config(struct gctl_req *req, struct g_class *mp, 54 const char *verb); 55static void g_nop_dumpconf(struct sbuf *sb, const char *indent, 56 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 57 58struct g_class g_nop_class = { 59 .name = G_NOP_CLASS_NAME, 60 .version = G_VERSION, 61 .ctlreq = g_nop_config, 62 .destroy_geom = g_nop_destroy_geom 63}; 64 65 66static void 67g_nop_orphan(struct g_consumer *cp) 68{ 69 70 g_topology_assert(); 71 g_nop_destroy(cp->geom, 1); 72} 73 74static void 75g_nop_resize(struct g_consumer *cp) 76{ 77 struct g_nop_softc *sc; 78 struct g_geom *gp; 79 struct g_provider *pp; 80 off_t size; 81 82 g_topology_assert(); 83 84 gp = cp->geom; 85 sc = gp->softc; 86 87 if (sc->sc_explicitsize != 0) 88 return; 89 if (cp->provider->mediasize < sc->sc_offset) { 90 g_nop_destroy(gp, 1); 91 return; 92 } 93 size = cp->provider->mediasize - sc->sc_offset; 94 LIST_FOREACH(pp, &gp->provider, provider) 95 g_resize_provider(pp, size); 96} 97 98static void 99g_nop_start(struct bio *bp) 100{ 101 struct g_nop_softc *sc; 102 struct g_geom *gp; 103 struct g_provider *pp; 104 struct bio *cbp; 105 u_int failprob = 0; 106 107 gp = bp->bio_to->geom; 108 sc = gp->softc; 109 G_NOP_LOGREQ(bp, "Request received."); 110 mtx_lock(&sc->sc_lock); 111 switch (bp->bio_cmd) { 112 case BIO_READ: 113 sc->sc_reads++; 114 sc->sc_readbytes += bp->bio_length; 115 failprob = sc->sc_rfailprob; 116 break; 117 case BIO_WRITE: 118 sc->sc_writes++; 119 sc->sc_wrotebytes += bp->bio_length; 120 failprob = sc->sc_wfailprob; 121 break; 122 } 123 mtx_unlock(&sc->sc_lock); 124 if (failprob > 0) { 125 u_int rval; 126 127 rval = arc4random() % 100; 128 if (rval < failprob) { 129 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error); 130 g_io_deliver(bp, sc->sc_error); 131 return; 132 } 133 } 134 cbp = g_clone_bio(bp); 135 if (cbp == NULL) { 136 g_io_deliver(bp, ENOMEM); 137 return; 138 } 139 cbp->bio_done = g_std_done; 140 cbp->bio_offset = bp->bio_offset + sc->sc_offset; 141 pp = LIST_FIRST(&gp->provider); 142 KASSERT(pp != NULL, ("NULL pp")); 143 cbp->bio_to = pp; 144 G_NOP_LOGREQ(cbp, "Sending request."); 145 g_io_request(cbp, LIST_FIRST(&gp->consumer)); 146} 147 148static int 149g_nop_access(struct g_provider *pp, int dr, int dw, int de) 150{ 151 struct g_geom *gp; 152 struct g_consumer *cp; 153 int error; 154 155 gp = pp->geom; 156 cp = LIST_FIRST(&gp->consumer); 157 error = g_access(cp, dr, dw, de); 158 159 return (error); 160} 161 162static int 163g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp, 164 int ioerror, u_int rfailprob, u_int wfailprob, off_t offset, off_t size, 165 u_int secsize, u_int stripesize, u_int stripeoffset) 166{ 167 struct g_nop_softc *sc; 168 struct g_geom *gp; 169 struct g_provider *newpp; 170 struct g_consumer *cp; 171 char name[64]; 172 int error; 173 off_t explicitsize; 174 175 g_topology_assert(); 176 177 gp = NULL; 178 newpp = NULL; 179 cp = NULL; 180 181 if ((offset % pp->sectorsize) != 0) { 182 gctl_error(req, "Invalid offset for provider %s.", pp->name); 183 return (EINVAL); 184 } 185 if ((size % pp->sectorsize) != 0) { 186 gctl_error(req, "Invalid size for provider %s.", pp->name); 187 return (EINVAL); 188 } 189 if (offset >= pp->mediasize) { 190 gctl_error(req, "Invalid offset for provider %s.", pp->name); 191 return (EINVAL); 192 } 193 explicitsize = size; 194 if (size == 0) 195 size = pp->mediasize - offset; 196 if (offset + size > pp->mediasize) { 197 gctl_error(req, "Invalid size for provider %s.", pp->name); 198 return (EINVAL); 199 } 200 if (secsize == 0) 201 secsize = pp->sectorsize; 202 else if ((secsize % pp->sectorsize) != 0) { 203 gctl_error(req, "Invalid secsize for provider %s.", pp->name); 204 return (EINVAL); 205 } 206 if (secsize > MAXPHYS) { 207 gctl_error(req, "secsize is too big."); 208 return (EINVAL); 209 } 210 size -= size % secsize; 211 if ((stripesize % pp->sectorsize) != 0) { 212 gctl_error(req, "Invalid stripesize for provider %s.", pp->name); 213 return (EINVAL); 214 } 215 if ((stripeoffset % pp->sectorsize) != 0) { 216 gctl_error(req, "Invalid stripeoffset for provider %s.", pp->name); 217 return (EINVAL); 218 } 219 if (stripesize != 0 && stripeoffset >= stripesize) { 220 gctl_error(req, "stripeoffset is too big."); 221 return (EINVAL); 222 } 223 snprintf(name, sizeof(name), "%s%s", pp->name, G_NOP_SUFFIX); 224 LIST_FOREACH(gp, &mp->geom, geom) { 225 if (strcmp(gp->name, name) == 0) { 226 gctl_error(req, "Provider %s already exists.", name); 227 return (EEXIST); 228 } 229 } 230 gp = g_new_geomf(mp, "%s", name); 231 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 232 sc->sc_offset = offset; 233 sc->sc_explicitsize = explicitsize; 234 sc->sc_stripesize = stripesize; 235 sc->sc_stripeoffset = stripeoffset; 236 sc->sc_error = ioerror; 237 sc->sc_rfailprob = rfailprob; 238 sc->sc_wfailprob = wfailprob; 239 sc->sc_reads = 0; 240 sc->sc_writes = 0; 241 sc->sc_readbytes = 0; 242 sc->sc_wrotebytes = 0; 243 mtx_init(&sc->sc_lock, "gnop lock", NULL, MTX_DEF); 244 gp->softc = sc; 245 gp->start = g_nop_start; 246 gp->orphan = g_nop_orphan; 247 gp->resize = g_nop_resize; 248 gp->access = g_nop_access; 249 gp->dumpconf = g_nop_dumpconf; 250 251 newpp = g_new_providerf(gp, "%s", gp->name); 252 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE; 253 newpp->mediasize = size; 254 newpp->sectorsize = secsize; 255 newpp->stripesize = stripesize; 256 newpp->stripeoffset = stripeoffset; 257 258 cp = g_new_consumer(gp); 259 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 260 error = g_attach(cp, pp); 261 if (error != 0) { 262 gctl_error(req, "Cannot attach to provider %s.", pp->name); 263 goto fail; 264 } 265 266 newpp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 267 g_error_provider(newpp, 0); 268 G_NOP_DEBUG(0, "Device %s created.", gp->name); 269 return (0); 270fail: 271 if (cp->provider != NULL) 272 g_detach(cp); 273 g_destroy_consumer(cp); 274 g_destroy_provider(newpp); 275 mtx_destroy(&sc->sc_lock); 276 g_free(gp->softc); 277 g_destroy_geom(gp); 278 return (error); 279} 280 281static int 282g_nop_destroy(struct g_geom *gp, boolean_t force) 283{ 284 struct g_nop_softc *sc; 285 struct g_provider *pp; 286 287 g_topology_assert(); 288 sc = gp->softc; 289 if (sc == NULL) 290 return (ENXIO); 291 pp = LIST_FIRST(&gp->provider); 292 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 293 if (force) { 294 G_NOP_DEBUG(0, "Device %s is still open, so it " 295 "can't be definitely removed.", pp->name); 296 } else { 297 G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).", 298 pp->name, pp->acr, pp->acw, pp->ace); 299 return (EBUSY); 300 } 301 } else { 302 G_NOP_DEBUG(0, "Device %s removed.", gp->name); 303 } 304 gp->softc = NULL; 305 mtx_destroy(&sc->sc_lock); 306 g_free(sc); 307 g_wither_geom(gp, ENXIO); 308 309 return (0); 310} 311 312static int 313g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 314{ 315 316 return (g_nop_destroy(gp, 0)); 317} 318 319static void 320g_nop_ctl_create(struct gctl_req *req, struct g_class *mp) 321{ 322 struct g_provider *pp; 323 intmax_t *error, *rfailprob, *wfailprob, *offset, *secsize, *size, 324 *stripesize, *stripeoffset; 325 const char *name; 326 char param[16]; 327 int i, *nargs; 328 329 g_topology_assert(); 330 331 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 332 if (nargs == NULL) { 333 gctl_error(req, "No '%s' argument", "nargs"); 334 return; 335 } 336 if (*nargs <= 0) { 337 gctl_error(req, "Missing device(s)."); 338 return; 339 } 340 error = gctl_get_paraml(req, "error", sizeof(*error)); 341 if (error == NULL) { 342 gctl_error(req, "No '%s' argument", "error"); 343 return; 344 } 345 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 346 if (rfailprob == NULL) { 347 gctl_error(req, "No '%s' argument", "rfailprob"); 348 return; 349 } 350 if (*rfailprob < -1 || *rfailprob > 100) { 351 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 352 return; 353 } 354 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 355 if (wfailprob == NULL) { 356 gctl_error(req, "No '%s' argument", "wfailprob"); 357 return; 358 } 359 if (*wfailprob < -1 || *wfailprob > 100) { 360 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 361 return; 362 } 363 offset = gctl_get_paraml(req, "offset", sizeof(*offset)); 364 if (offset == NULL) { 365 gctl_error(req, "No '%s' argument", "offset"); 366 return; 367 } 368 if (*offset < 0) { 369 gctl_error(req, "Invalid '%s' argument", "offset"); 370 return; 371 } 372 size = gctl_get_paraml(req, "size", sizeof(*size)); 373 if (size == NULL) { 374 gctl_error(req, "No '%s' argument", "size"); 375 return; 376 } 377 if (*size < 0) { 378 gctl_error(req, "Invalid '%s' argument", "size"); 379 return; 380 } 381 secsize = gctl_get_paraml(req, "secsize", sizeof(*secsize)); 382 if (secsize == NULL) { 383 gctl_error(req, "No '%s' argument", "secsize"); 384 return; 385 } 386 if (*secsize < 0) { 387 gctl_error(req, "Invalid '%s' argument", "secsize"); 388 return; 389 } 390 stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize)); 391 if (stripesize == NULL) { 392 gctl_error(req, "No '%s' argument", "stripesize"); 393 return; 394 } 395 if (*stripesize < 0) { 396 gctl_error(req, "Invalid '%s' argument", "stripesize"); 397 return; 398 } 399 stripeoffset = gctl_get_paraml(req, "stripeoffset", sizeof(*stripeoffset)); 400 if (stripeoffset == NULL) { 401 gctl_error(req, "No '%s' argument", "stripeoffset"); 402 return; 403 } 404 if (*stripeoffset < 0) { 405 gctl_error(req, "Invalid '%s' argument", "stripeoffset"); 406 return; 407 } 408 409 for (i = 0; i < *nargs; i++) { 410 snprintf(param, sizeof(param), "arg%d", i); 411 name = gctl_get_asciiparam(req, param); 412 if (name == NULL) { 413 gctl_error(req, "No 'arg%d' argument", i); 414 return; 415 } 416 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 417 name += strlen("/dev/"); 418 pp = g_provider_by_name(name); 419 if (pp == NULL) { 420 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 421 gctl_error(req, "Provider %s is invalid.", name); 422 return; 423 } 424 if (g_nop_create(req, mp, pp, 425 *error == -1 ? EIO : (int)*error, 426 *rfailprob == -1 ? 0 : (u_int)*rfailprob, 427 *wfailprob == -1 ? 0 : (u_int)*wfailprob, 428 (off_t)*offset, (off_t)*size, (u_int)*secsize, 429 (u_int)*stripesize, (u_int)*stripeoffset) != 0) { 430 return; 431 } 432 } 433} 434 435static void 436g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp) 437{ 438 struct g_nop_softc *sc; 439 struct g_provider *pp; 440 intmax_t *error, *rfailprob, *wfailprob; 441 const char *name; 442 char param[16]; 443 int i, *nargs; 444 445 g_topology_assert(); 446 447 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 448 if (nargs == NULL) { 449 gctl_error(req, "No '%s' argument", "nargs"); 450 return; 451 } 452 if (*nargs <= 0) { 453 gctl_error(req, "Missing device(s)."); 454 return; 455 } 456 error = gctl_get_paraml(req, "error", sizeof(*error)); 457 if (error == NULL) { 458 gctl_error(req, "No '%s' argument", "error"); 459 return; 460 } 461 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 462 if (rfailprob == NULL) { 463 gctl_error(req, "No '%s' argument", "rfailprob"); 464 return; 465 } 466 if (*rfailprob < -1 || *rfailprob > 100) { 467 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 468 return; 469 } 470 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 471 if (wfailprob == NULL) { 472 gctl_error(req, "No '%s' argument", "wfailprob"); 473 return; 474 } 475 if (*wfailprob < -1 || *wfailprob > 100) { 476 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 477 return; 478 } 479 480 for (i = 0; i < *nargs; i++) { 481 snprintf(param, sizeof(param), "arg%d", i); 482 name = gctl_get_asciiparam(req, param); 483 if (name == NULL) { 484 gctl_error(req, "No 'arg%d' argument", i); 485 return; 486 } 487 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 488 name += strlen("/dev/"); 489 pp = g_provider_by_name(name); 490 if (pp == NULL || pp->geom->class != mp) { 491 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 492 gctl_error(req, "Provider %s is invalid.", name); 493 return; 494 } 495 sc = pp->geom->softc; 496 if (*error != -1) 497 sc->sc_error = (int)*error; 498 if (*rfailprob != -1) 499 sc->sc_rfailprob = (u_int)*rfailprob; 500 if (*wfailprob != -1) 501 sc->sc_wfailprob = (u_int)*wfailprob; 502 } 503} 504 505static struct g_geom * 506g_nop_find_geom(struct g_class *mp, const char *name) 507{ 508 struct g_geom *gp; 509 510 LIST_FOREACH(gp, &mp->geom, geom) { 511 if (strcmp(gp->name, name) == 0) 512 return (gp); 513 } 514 return (NULL); 515} 516 517static void 518g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp) 519{ 520 int *nargs, *force, error, i; 521 struct g_geom *gp; 522 const char *name; 523 char param[16]; 524 525 g_topology_assert(); 526 527 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 528 if (nargs == NULL) { 529 gctl_error(req, "No '%s' argument", "nargs"); 530 return; 531 } 532 if (*nargs <= 0) { 533 gctl_error(req, "Missing device(s)."); 534 return; 535 } 536 force = gctl_get_paraml(req, "force", sizeof(*force)); 537 if (force == NULL) { 538 gctl_error(req, "No 'force' argument"); 539 return; 540 } 541 542 for (i = 0; i < *nargs; i++) { 543 snprintf(param, sizeof(param), "arg%d", i); 544 name = gctl_get_asciiparam(req, param); 545 if (name == NULL) { 546 gctl_error(req, "No 'arg%d' argument", i); 547 return; 548 } 549 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 550 name += strlen("/dev/"); 551 gp = g_nop_find_geom(mp, name); 552 if (gp == NULL) { 553 G_NOP_DEBUG(1, "Device %s is invalid.", name); 554 gctl_error(req, "Device %s is invalid.", name); 555 return; 556 } 557 error = g_nop_destroy(gp, *force); 558 if (error != 0) { 559 gctl_error(req, "Cannot destroy device %s (error=%d).", 560 gp->name, error); 561 return; 562 } 563 } 564} 565 566static void 567g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp) 568{ 569 struct g_nop_softc *sc; 570 struct g_provider *pp; 571 const char *name; 572 char param[16]; 573 int i, *nargs; 574 575 g_topology_assert(); 576 577 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 578 if (nargs == NULL) { 579 gctl_error(req, "No '%s' argument", "nargs"); 580 return; 581 } 582 if (*nargs <= 0) { 583 gctl_error(req, "Missing device(s)."); 584 return; 585 } 586 587 for (i = 0; i < *nargs; i++) { 588 snprintf(param, sizeof(param), "arg%d", i); 589 name = gctl_get_asciiparam(req, param); 590 if (name == NULL) { 591 gctl_error(req, "No 'arg%d' argument", i); 592 return; 593 } 594 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 595 name += strlen("/dev/"); 596 pp = g_provider_by_name(name); 597 if (pp == NULL || pp->geom->class != mp) { 598 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 599 gctl_error(req, "Provider %s is invalid.", name); 600 return; 601 } 602 sc = pp->geom->softc; 603 sc->sc_reads = 0; 604 sc->sc_writes = 0; 605 sc->sc_readbytes = 0; 606 sc->sc_wrotebytes = 0; 607 } 608} 609 610static void 611g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb) 612{ 613 uint32_t *version; 614 615 g_topology_assert(); 616 617 version = gctl_get_paraml(req, "version", sizeof(*version)); 618 if (version == NULL) { 619 gctl_error(req, "No '%s' argument.", "version"); 620 return; 621 } 622 if (*version != G_NOP_VERSION) { 623 gctl_error(req, "Userland and kernel parts are out of sync."); 624 return; 625 } 626 627 if (strcmp(verb, "create") == 0) { 628 g_nop_ctl_create(req, mp); 629 return; 630 } else if (strcmp(verb, "configure") == 0) { 631 g_nop_ctl_configure(req, mp); 632 return; 633 } else if (strcmp(verb, "destroy") == 0) { 634 g_nop_ctl_destroy(req, mp); 635 return; 636 } else if (strcmp(verb, "reset") == 0) { 637 g_nop_ctl_reset(req, mp); 638 return; 639 } 640 641 gctl_error(req, "Unknown verb."); 642} 643 644static void 645g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 646 struct g_consumer *cp, struct g_provider *pp) 647{ 648 struct g_nop_softc *sc; 649 650 if (pp != NULL || cp != NULL) 651 return; 652 sc = gp->softc; 653 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent, 654 (intmax_t)sc->sc_offset); 655 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent, 656 sc->sc_rfailprob); 657 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent, 658 sc->sc_wfailprob); 659 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error); 660 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads); 661 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes); 662 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent, 663 sc->sc_readbytes); 664 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent, 665 sc->sc_wrotebytes); 666} 667 668DECLARE_GEOM_CLASS(g_nop_class, g_nop); 669