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sys/geom/nop/g_nop.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5 * Copyright (c) 2019 Mariusz Zaborski <oshogbo@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/ctype.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/bio.h> 41 #include <sys/sbuf.h> 42 #include <sys/sysctl.h> 43 #include <sys/malloc.h> 44 #include <geom/geom.h> 45 #include <geom/geom_dbg.h> 46 #include <geom/nop/g_nop.h> 47 48 SYSCTL_DECL(_kern_geom); 49 static SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 50 "GEOM_NOP stuff"); 51 static u_int g_nop_debug = 0; 52 SYSCTL_UINT(_kern_geom_nop, OID_AUTO, debug, CTLFLAG_RW, &g_nop_debug, 0, 53 "Debug level"); 54 55 static int g_nop_destroy(struct g_geom *gp, boolean_t force); 56 static int g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, 57 struct g_geom *gp); 58 static void g_nop_config(struct gctl_req *req, struct g_class *mp, 59 const char *verb); 60 static g_access_t g_nop_access; 61 static g_dumpconf_t g_nop_dumpconf; 62 static g_orphan_t g_nop_orphan; 63 static g_provgone_t g_nop_providergone; 64 static g_resize_t g_nop_resize; 65 static g_start_t g_nop_start; 66 67 struct g_class g_nop_class = { 68 .name = G_NOP_CLASS_NAME, 69 .version = G_VERSION, 70 .ctlreq = g_nop_config, 71 .destroy_geom = g_nop_destroy_geom, 72 .access = g_nop_access, 73 .dumpconf = g_nop_dumpconf, 74 .orphan = g_nop_orphan, 75 .providergone = g_nop_providergone, 76 .resize = g_nop_resize, 77 .start = g_nop_start, 78 }; 79 80 struct g_nop_delay { 81 struct callout dl_cal; 82 struct bio *dl_bio; 83 TAILQ_ENTRY(g_nop_delay) dl_next; 84 }; 85 86 static bool 87 g_nop_verify_nprefix(const char *name) 88 { 89 int i; 90 91 for (i = 0; i < strlen(name); i++) { 92 if (isalpha(name[i]) == 0 && isdigit(name[i]) == 0) { 93 return (false); 94 } 95 } 96 97 return (true); 98 } 99 100 static void 101 g_nop_orphan(struct g_consumer *cp) 102 { 103 104 g_topology_assert(); 105 g_nop_destroy(cp->geom, 1); 106 } 107 108 static void 109 g_nop_resize(struct g_consumer *cp) 110 { 111 struct g_nop_softc *sc; 112 struct g_geom *gp; 113 struct g_provider *pp; 114 off_t size; 115 116 g_topology_assert(); 117 118 gp = cp->geom; 119 sc = gp->softc; 120 121 if (sc->sc_explicitsize != 0) 122 return; 123 if (cp->provider->mediasize < sc->sc_offset) { 124 g_nop_destroy(gp, 1); 125 return; 126 } 127 size = cp->provider->mediasize - sc->sc_offset; 128 LIST_FOREACH(pp, &gp->provider, provider) 129 g_resize_provider(pp, size); 130 } 131 132 static int 133 g_nop_dumper(void *priv, void *virtual, off_t offset, size_t length) 134 { 135 136 return (0); 137 } 138 139 static void 140 g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc) 141 { 142 struct g_kerneldump *gkd; 143 struct g_geom *gp; 144 struct g_provider *pp; 145 146 gkd = (struct g_kerneldump *)bp->bio_data; 147 gp = bp->bio_to->geom; 148 g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name, 149 (intmax_t)gkd->offset, (intmax_t)gkd->length); 150 151 pp = LIST_FIRST(&gp->provider); 152 153 gkd->di.dumper = g_nop_dumper; 154 gkd->di.priv = sc; 155 gkd->di.blocksize = pp->sectorsize; 156 gkd->di.maxiosize = DFLTPHYS; 157 gkd->di.mediaoffset = sc->sc_offset + gkd->offset; 158 if (gkd->offset > sc->sc_explicitsize) { 159 g_io_deliver(bp, ENODEV); 160 return; 161 } 162 if (gkd->offset + gkd->length > sc->sc_explicitsize) 163 gkd->length = sc->sc_explicitsize - gkd->offset; 164 gkd->di.mediasize = gkd->length; 165 g_io_deliver(bp, 0); 166 } 167 168 static void 169 g_nop_pass(struct bio *cbp, struct g_geom *gp) 170 { 171 172 G_NOP_LOGREQ(cbp, "Sending request."); 173 g_io_request(cbp, LIST_FIRST(&gp->consumer)); 174 } 175 176 static void 177 g_nop_pass_timeout(void *data) 178 { 179 struct g_nop_softc *sc; 180 struct g_geom *gp; 181 struct g_nop_delay *gndelay; 182 183 gndelay = (struct g_nop_delay *)data; 184 185 gp = gndelay->dl_bio->bio_to->geom; 186 sc = gp->softc; 187 188 mtx_lock(&sc->sc_lock); 189 TAILQ_REMOVE(&sc->sc_head_delay, gndelay, dl_next); 190 mtx_unlock(&sc->sc_lock); 191 192 g_nop_pass(gndelay->dl_bio, gp); 193 194 g_free(data); 195 } 196 197 static void 198 g_nop_start(struct bio *bp) 199 { 200 struct g_nop_softc *sc; 201 struct g_geom *gp; 202 struct g_provider *pp; 203 struct bio *cbp; 204 u_int failprob, delayprob, delaytime; 205 206 failprob = delayprob = delaytime = 0; 207 208 gp = bp->bio_to->geom; 209 sc = gp->softc; 210 211 G_NOP_LOGREQ(bp, "Request received."); 212 mtx_lock(&sc->sc_lock); 213 switch (bp->bio_cmd) { 214 case BIO_READ: 215 sc->sc_reads++; 216 sc->sc_readbytes += bp->bio_length; 217 if (sc->sc_count_until_fail != 0) { 218 sc->sc_count_until_fail -= 1; 219 } else { 220 failprob = sc->sc_rfailprob; 221 delayprob = sc->sc_rdelayprob; 222 delaytime = sc->sc_delaymsec; 223 } 224 break; 225 case BIO_WRITE: 226 sc->sc_writes++; 227 sc->sc_wrotebytes += bp->bio_length; 228 if (sc->sc_count_until_fail != 0) { 229 sc->sc_count_until_fail -= 1; 230 } else { 231 failprob = sc->sc_wfailprob; 232 delayprob = sc->sc_wdelayprob; 233 delaytime = sc->sc_delaymsec; 234 } 235 break; 236 case BIO_DELETE: 237 sc->sc_deletes++; 238 break; 239 case BIO_GETATTR: 240 sc->sc_getattrs++; 241 if (sc->sc_physpath && 242 g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) 243 ; 244 else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0) 245 g_nop_kerneldump(bp, sc); 246 else 247 /* 248 * Fallthrough to forwarding the GETATTR down to the 249 * lower level device. 250 */ 251 break; 252 mtx_unlock(&sc->sc_lock); 253 return; 254 case BIO_FLUSH: 255 sc->sc_flushes++; 256 break; 257 case BIO_SPEEDUP: 258 sc->sc_speedups++; 259 break; 260 case BIO_CMD0: 261 sc->sc_cmd0s++; 262 break; 263 case BIO_CMD1: 264 sc->sc_cmd1s++; 265 break; 266 case BIO_CMD2: 267 sc->sc_cmd2s++; 268 break; 269 } 270 mtx_unlock(&sc->sc_lock); 271 272 if (failprob > 0) { 273 u_int rval; 274 275 rval = arc4random() % 100; 276 if (rval < failprob) { 277 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error); 278 g_io_deliver(bp, sc->sc_error); 279 return; 280 } 281 } 282 283 cbp = g_clone_bio(bp); 284 if (cbp == NULL) { 285 g_io_deliver(bp, ENOMEM); 286 return; 287 } 288 cbp->bio_done = g_std_done; 289 cbp->bio_offset = bp->bio_offset + sc->sc_offset; 290 pp = LIST_FIRST(&gp->provider); 291 KASSERT(pp != NULL, ("NULL pp")); 292 cbp->bio_to = pp; 293 294 if (delayprob > 0) { 295 struct g_nop_delay *gndelay; 296 u_int rval; 297 298 rval = arc4random() % 100; 299 if (rval < delayprob) { 300 gndelay = g_malloc(sizeof(*gndelay), M_NOWAIT | M_ZERO); 301 if (gndelay != NULL) { 302 callout_init(&gndelay->dl_cal, 1); 303 304 gndelay->dl_bio = cbp; 305 306 mtx_lock(&sc->sc_lock); 307 TAILQ_INSERT_TAIL(&sc->sc_head_delay, gndelay, 308 dl_next); 309 mtx_unlock(&sc->sc_lock); 310 311 callout_reset(&gndelay->dl_cal, 312 MSEC_2_TICKS(delaytime), g_nop_pass_timeout, 313 gndelay); 314 return; 315 } 316 } 317 } 318 319 g_nop_pass(cbp, gp); 320 } 321 322 static int 323 g_nop_access(struct g_provider *pp, int dr, int dw, int de) 324 { 325 struct g_geom *gp; 326 struct g_consumer *cp; 327 int error; 328 329 gp = pp->geom; 330 cp = LIST_FIRST(&gp->consumer); 331 error = g_access(cp, dr, dw, de); 332 333 return (error); 334 } 335 336 static int 337 g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp, 338 const char *gnopname, int ioerror, u_int count_until_fail, 339 u_int rfailprob, u_int wfailprob, u_int delaymsec, u_int rdelayprob, 340 u_int wdelayprob, off_t offset, off_t size, u_int secsize, off_t stripesize, 341 off_t stripeoffset, const char *physpath) 342 { 343 struct g_nop_softc *sc; 344 struct g_geom *gp; 345 struct g_provider *newpp; 346 struct g_consumer *cp; 347 struct g_geom_alias *gap; 348 char name[64]; 349 int error, n; 350 off_t explicitsize; 351 352 g_topology_assert(); 353 354 gp = NULL; 355 newpp = NULL; 356 cp = NULL; 357 358 if ((offset % pp->sectorsize) != 0) { 359 gctl_error(req, "Invalid offset for provider %s.", pp->name); 360 return (EINVAL); 361 } 362 if ((size % pp->sectorsize) != 0) { 363 gctl_error(req, "Invalid size for provider %s.", pp->name); 364 return (EINVAL); 365 } 366 if (offset >= pp->mediasize) { 367 gctl_error(req, "Invalid offset for provider %s.", pp->name); 368 return (EINVAL); 369 } 370 explicitsize = size; 371 if (size == 0) 372 size = pp->mediasize - offset; 373 if (offset + size > pp->mediasize) { 374 gctl_error(req, "Invalid size for provider %s.", pp->name); 375 return (EINVAL); 376 } 377 if (secsize == 0) 378 secsize = pp->sectorsize; 379 else if ((secsize % pp->sectorsize) != 0) { 380 gctl_error(req, "Invalid secsize for provider %s.", pp->name); 381 return (EINVAL); 382 } 383 if (secsize > maxphys) { 384 gctl_error(req, "secsize is too big."); 385 return (EINVAL); 386 } 387 size -= size % secsize; 388 if ((stripesize % pp->sectorsize) != 0) { 389 gctl_error(req, "Invalid stripesize for provider %s.", pp->name); 390 return (EINVAL); 391 } 392 if ((stripeoffset % pp->sectorsize) != 0) { 393 gctl_error(req, "Invalid stripeoffset for provider %s.", pp->name); 394 return (EINVAL); 395 } 396 if (stripesize != 0 && stripeoffset >= stripesize) { 397 gctl_error(req, "stripeoffset is too big."); 398 return (EINVAL); 399 } 400 if (gnopname != NULL && !g_nop_verify_nprefix(gnopname)) { 401 gctl_error(req, "Name %s is invalid.", gnopname); 402 return (EINVAL); 403 } 404 405 if (gnopname != NULL) { 406 n = snprintf(name, sizeof(name), "%s%s", gnopname, 407 G_NOP_SUFFIX); 408 } else { 409 n = snprintf(name, sizeof(name), "%s%s", pp->name, 410 G_NOP_SUFFIX); 411 } 412 if (n <= 0 || n >= sizeof(name)) { 413 gctl_error(req, "Invalid provider name."); 414 return (EINVAL); 415 } 416 LIST_FOREACH(gp, &mp->geom, geom) { 417 if (strcmp(gp->name, name) == 0) { 418 gctl_error(req, "Provider %s already exists.", name); 419 return (EEXIST); 420 } 421 } 422 gp = g_new_geomf(mp, "%s", name); 423 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 424 sc->sc_offset = offset; 425 sc->sc_explicitsize = explicitsize; 426 sc->sc_stripesize = stripesize; 427 sc->sc_stripeoffset = stripeoffset; 428 if (physpath && strcmp(physpath, G_NOP_PHYSPATH_PASSTHROUGH)) { 429 sc->sc_physpath = strndup(physpath, MAXPATHLEN, M_GEOM); 430 } else 431 sc->sc_physpath = NULL; 432 sc->sc_error = ioerror; 433 sc->sc_count_until_fail = count_until_fail; 434 sc->sc_rfailprob = rfailprob; 435 sc->sc_wfailprob = wfailprob; 436 sc->sc_delaymsec = delaymsec; 437 sc->sc_rdelayprob = rdelayprob; 438 sc->sc_wdelayprob = wdelayprob; 439 sc->sc_reads = 0; 440 sc->sc_writes = 0; 441 sc->sc_deletes = 0; 442 sc->sc_getattrs = 0; 443 sc->sc_flushes = 0; 444 sc->sc_speedups = 0; 445 sc->sc_cmd0s = 0; 446 sc->sc_cmd1s = 0; 447 sc->sc_cmd2s = 0; 448 sc->sc_readbytes = 0; 449 sc->sc_wrotebytes = 0; 450 TAILQ_INIT(&sc->sc_head_delay); 451 mtx_init(&sc->sc_lock, "gnop lock", NULL, MTX_DEF); 452 gp->softc = sc; 453 454 newpp = g_new_providerf(gp, "%s", gp->name); 455 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE; 456 newpp->mediasize = size; 457 newpp->sectorsize = secsize; 458 newpp->stripesize = stripesize; 459 newpp->stripeoffset = stripeoffset; 460 LIST_FOREACH(gap, &pp->aliases, ga_next) 461 g_provider_add_alias(newpp, "%s%s", gap->ga_alias, G_NOP_SUFFIX); 462 463 cp = g_new_consumer(gp); 464 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 465 error = g_attach(cp, pp); 466 if (error != 0) { 467 gctl_error(req, "Cannot attach to provider %s.", pp->name); 468 goto fail; 469 } 470 471 newpp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 472 g_error_provider(newpp, 0); 473 G_NOP_DEBUG(0, "Device %s created.", gp->name); 474 return (0); 475 fail: 476 if (cp->provider != NULL) 477 g_detach(cp); 478 g_destroy_consumer(cp); 479 g_destroy_provider(newpp); 480 mtx_destroy(&sc->sc_lock); 481 free(sc->sc_physpath, M_GEOM); 482 g_free(gp->softc); 483 g_destroy_geom(gp); 484 return (error); 485 } 486 487 static void 488 g_nop_providergone(struct g_provider *pp) 489 { 490 struct g_geom *gp = pp->geom; 491 struct g_nop_softc *sc = gp->softc; 492 493 KASSERT(TAILQ_EMPTY(&sc->sc_head_delay), 494 ("delayed request list is not empty")); 495 496 gp->softc = NULL; 497 free(sc->sc_physpath, M_GEOM); 498 mtx_destroy(&sc->sc_lock); 499 g_free(sc); 500 } 501 502 static int 503 g_nop_destroy(struct g_geom *gp, boolean_t force) 504 { 505 struct g_nop_softc *sc; 506 struct g_provider *pp; 507 508 g_topology_assert(); 509 sc = gp->softc; 510 if (sc == NULL) 511 return (ENXIO); 512 pp = LIST_FIRST(&gp->provider); 513 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 514 if (force) { 515 G_NOP_DEBUG(0, "Device %s is still open, so it " 516 "can't be definitely removed.", pp->name); 517 } else { 518 G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).", 519 pp->name, pp->acr, pp->acw, pp->ace); 520 return (EBUSY); 521 } 522 } else { 523 G_NOP_DEBUG(0, "Device %s removed.", gp->name); 524 } 525 526 g_wither_geom(gp, ENXIO); 527 528 return (0); 529 } 530 531 static int 532 g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 533 { 534 535 return (g_nop_destroy(gp, 0)); 536 } 537 538 static void 539 g_nop_ctl_create(struct gctl_req *req, struct g_class *mp) 540 { 541 struct g_provider *pp; 542 intmax_t *val, error, rfailprob, wfailprob, count_until_fail, offset, 543 secsize, size, stripesize, stripeoffset, delaymsec, 544 rdelayprob, wdelayprob; 545 const char *physpath, *gnopname; 546 char param[16]; 547 int i, *nargs; 548 549 g_topology_assert(); 550 551 error = -1; 552 rfailprob = -1; 553 wfailprob = -1; 554 count_until_fail = -1; 555 offset = 0; 556 secsize = 0; 557 size = 0; 558 stripesize = 0; 559 stripeoffset = 0; 560 delaymsec = -1; 561 rdelayprob = -1; 562 wdelayprob = -1; 563 564 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 565 if (nargs == NULL) { 566 gctl_error(req, "No '%s' argument", "nargs"); 567 return; 568 } 569 if (*nargs <= 0) { 570 gctl_error(req, "Missing device(s)."); 571 return; 572 } 573 val = gctl_get_paraml_opt(req, "error", sizeof(*val)); 574 if (val != NULL) { 575 error = *val; 576 } 577 val = gctl_get_paraml_opt(req, "rfailprob", sizeof(*val)); 578 if (val != NULL) { 579 rfailprob = *val; 580 if (rfailprob < -1 || rfailprob > 100) { 581 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 582 return; 583 } 584 } 585 val = gctl_get_paraml_opt(req, "wfailprob", sizeof(*val)); 586 if (val != NULL) { 587 wfailprob = *val; 588 if (wfailprob < -1 || wfailprob > 100) { 589 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 590 return; 591 } 592 } 593 val = gctl_get_paraml_opt(req, "delaymsec", sizeof(*val)); 594 if (val != NULL) { 595 delaymsec = *val; 596 if (delaymsec < 1 && delaymsec != -1) { 597 gctl_error(req, "Invalid '%s' argument", "delaymsec"); 598 return; 599 } 600 } 601 val = gctl_get_paraml_opt(req, "rdelayprob", sizeof(*val)); 602 if (val != NULL) { 603 rdelayprob = *val; 604 if (rdelayprob < -1 || rdelayprob > 100) { 605 gctl_error(req, "Invalid '%s' argument", "rdelayprob"); 606 return; 607 } 608 } 609 val = gctl_get_paraml_opt(req, "wdelayprob", sizeof(*val)); 610 if (val != NULL) { 611 wdelayprob = *val; 612 if (wdelayprob < -1 || wdelayprob > 100) { 613 gctl_error(req, "Invalid '%s' argument", "wdelayprob"); 614 return; 615 } 616 } 617 val = gctl_get_paraml_opt(req, "count_until_fail", sizeof(*val)); 618 if (val != NULL) { 619 count_until_fail = *val; 620 if (count_until_fail < -1) { 621 gctl_error(req, "Invalid '%s' argument", 622 "count_until_fail"); 623 return; 624 } 625 } 626 val = gctl_get_paraml_opt(req, "offset", sizeof(*val)); 627 if (val != NULL) { 628 offset = *val; 629 if (offset < 0) { 630 gctl_error(req, "Invalid '%s' argument", "offset"); 631 return; 632 } 633 } 634 val = gctl_get_paraml_opt(req, "size", sizeof(*val)); 635 if (val != NULL) { 636 size = *val; 637 if (size < 0) { 638 gctl_error(req, "Invalid '%s' argument", "size"); 639 return; 640 } 641 } 642 val = gctl_get_paraml_opt(req, "secsize", sizeof(*val)); 643 if (val != NULL) { 644 secsize = *val; 645 if (secsize < 0) { 646 gctl_error(req, "Invalid '%s' argument", "secsize"); 647 return; 648 } 649 } 650 val = gctl_get_paraml_opt(req, "stripesize", sizeof(*val)); 651 if (val != NULL) { 652 stripesize = *val; 653 if (stripesize < 0) { 654 gctl_error(req, "Invalid '%s' argument", "stripesize"); 655 return; 656 } 657 } 658 val = gctl_get_paraml_opt(req, "stripeoffset", sizeof(*val)); 659 if (val != NULL) { 660 stripeoffset = *val; 661 if (stripeoffset < 0) { 662 gctl_error(req, "Invalid '%s' argument", 663 "stripeoffset"); 664 return; 665 } 666 } 667 physpath = gctl_get_asciiparam(req, "physpath"); 668 gnopname = gctl_get_asciiparam(req, "gnopname"); 669 670 for (i = 0; i < *nargs; i++) { 671 snprintf(param, sizeof(param), "arg%d", i); 672 pp = gctl_get_provider(req, param); 673 if (pp == NULL) 674 return; 675 if (g_nop_create(req, mp, pp, 676 gnopname, 677 error == -1 ? EIO : (int)error, 678 count_until_fail == -1 ? 0 : (u_int)count_until_fail, 679 rfailprob == -1 ? 0 : (u_int)rfailprob, 680 wfailprob == -1 ? 0 : (u_int)wfailprob, 681 delaymsec == -1 ? 1 : (u_int)delaymsec, 682 rdelayprob == -1 ? 0 : (u_int)rdelayprob, 683 wdelayprob == -1 ? 0 : (u_int)wdelayprob, 684 (off_t)offset, (off_t)size, (u_int)secsize, 685 (off_t)stripesize, (off_t)stripeoffset, 686 physpath) != 0) { 687 return; 688 } 689 } 690 } 691 692 static void 693 g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp) 694 { 695 struct g_nop_softc *sc; 696 struct g_provider *pp; 697 intmax_t *val, delaymsec, error, rdelayprob, rfailprob, wdelayprob, 698 wfailprob, count_until_fail; 699 char param[16]; 700 int i, *nargs; 701 702 g_topology_assert(); 703 704 count_until_fail = -1; 705 delaymsec = -1; 706 error = -1; 707 rdelayprob = -1; 708 rfailprob = -1; 709 wdelayprob = -1; 710 wfailprob = -1; 711 712 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 713 if (nargs == NULL) { 714 gctl_error(req, "No '%s' argument", "nargs"); 715 return; 716 } 717 if (*nargs <= 0) { 718 gctl_error(req, "Missing device(s)."); 719 return; 720 } 721 val = gctl_get_paraml_opt(req, "error", sizeof(*val)); 722 if (val != NULL) { 723 error = *val; 724 } 725 val = gctl_get_paraml_opt(req, "count_until_fail", sizeof(*val)); 726 if (val != NULL) { 727 count_until_fail = *val; 728 } 729 val = gctl_get_paraml_opt(req, "rfailprob", sizeof(*val)); 730 if (val != NULL) { 731 rfailprob = *val; 732 if (rfailprob < -1 || rfailprob > 100) { 733 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 734 return; 735 } 736 } 737 val = gctl_get_paraml_opt(req, "wfailprob", sizeof(*val)); 738 if (val != NULL) { 739 wfailprob = *val; 740 if (wfailprob < -1 || wfailprob > 100) { 741 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 742 return; 743 } 744 } 745 val = gctl_get_paraml_opt(req, "delaymsec", sizeof(*val)); 746 if (val != NULL) { 747 delaymsec = *val; 748 if (delaymsec < 1 && delaymsec != -1) { 749 gctl_error(req, "Invalid '%s' argument", "delaymsec"); 750 return; 751 } 752 } 753 val = gctl_get_paraml_opt(req, "rdelayprob", sizeof(*val)); 754 if (val != NULL) { 755 rdelayprob = *val; 756 if (rdelayprob < -1 || rdelayprob > 100) { 757 gctl_error(req, "Invalid '%s' argument", "rdelayprob"); 758 return; 759 } 760 } 761 val = gctl_get_paraml_opt(req, "wdelayprob", sizeof(*val)); 762 if (val != NULL) { 763 wdelayprob = *val; 764 if (wdelayprob < -1 || wdelayprob > 100) { 765 gctl_error(req, "Invalid '%s' argument", "wdelayprob"); 766 return; 767 } 768 } 769 770 for (i = 0; i < *nargs; i++) { 771 snprintf(param, sizeof(param), "arg%d", i); 772 pp = gctl_get_provider(req, param); 773 if (pp == NULL) 774 return; 775 if (pp->geom->class != mp) { 776 G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name); 777 gctl_error(req, "Provider %s is invalid.", pp->name); 778 return; 779 } 780 sc = pp->geom->softc; 781 if (error != -1) 782 sc->sc_error = (int)error; 783 if (rfailprob != -1) 784 sc->sc_rfailprob = (u_int)rfailprob; 785 if (wfailprob != -1) 786 sc->sc_wfailprob = (u_int)wfailprob; 787 if (rdelayprob != -1) 788 sc->sc_rdelayprob = (u_int)rdelayprob; 789 if (wdelayprob != -1) 790 sc->sc_wdelayprob = (u_int)wdelayprob; 791 if (delaymsec != -1) 792 sc->sc_delaymsec = (u_int)delaymsec; 793 if (count_until_fail != -1) 794 sc->sc_count_until_fail = (u_int)count_until_fail; 795 } 796 } 797 798 static struct g_geom * 799 g_nop_find_geom(struct g_class *mp, const char *name) 800 { 801 struct g_geom *gp; 802 803 LIST_FOREACH(gp, &mp->geom, geom) { 804 if (strcmp(gp->name, name) == 0) 805 return (gp); 806 } 807 return (NULL); 808 } 809 810 static void 811 g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp) 812 { 813 int *nargs, *force, error, i; 814 struct g_geom *gp; 815 const char *name; 816 char param[16]; 817 818 g_topology_assert(); 819 820 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 821 if (nargs == NULL) { 822 gctl_error(req, "No '%s' argument", "nargs"); 823 return; 824 } 825 if (*nargs <= 0) { 826 gctl_error(req, "Missing device(s)."); 827 return; 828 } 829 force = gctl_get_paraml(req, "force", sizeof(*force)); 830 if (force == NULL) { 831 gctl_error(req, "No 'force' argument"); 832 return; 833 } 834 835 for (i = 0; i < *nargs; i++) { 836 snprintf(param, sizeof(param), "arg%d", i); 837 name = gctl_get_asciiparam(req, param); 838 if (name == NULL) { 839 gctl_error(req, "No 'arg%d' argument", i); 840 return; 841 } 842 if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0) 843 name += strlen(_PATH_DEV); 844 gp = g_nop_find_geom(mp, name); 845 if (gp == NULL) { 846 G_NOP_DEBUG(1, "Device %s is invalid.", name); 847 gctl_error(req, "Device %s is invalid.", name); 848 return; 849 } 850 error = g_nop_destroy(gp, *force); 851 if (error != 0) { 852 gctl_error(req, "Cannot destroy device %s (error=%d).", 853 gp->name, error); 854 return; 855 } 856 } 857 } 858 859 static void 860 g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp) 861 { 862 struct g_nop_softc *sc; 863 struct g_provider *pp; 864 char param[16]; 865 int i, *nargs; 866 867 g_topology_assert(); 868 869 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 870 if (nargs == NULL) { 871 gctl_error(req, "No '%s' argument", "nargs"); 872 return; 873 } 874 if (*nargs <= 0) { 875 gctl_error(req, "Missing device(s)."); 876 return; 877 } 878 879 for (i = 0; i < *nargs; i++) { 880 snprintf(param, sizeof(param), "arg%d", i); 881 pp = gctl_get_provider(req, param); 882 if (pp == NULL) 883 return; 884 if (pp->geom->class != mp) { 885 G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name); 886 gctl_error(req, "Provider %s is invalid.", pp->name); 887 return; 888 } 889 sc = pp->geom->softc; 890 sc->sc_reads = 0; 891 sc->sc_writes = 0; 892 sc->sc_deletes = 0; 893 sc->sc_getattrs = 0; 894 sc->sc_flushes = 0; 895 sc->sc_speedups = 0; 896 sc->sc_cmd0s = 0; 897 sc->sc_cmd1s = 0; 898 sc->sc_cmd2s = 0; 899 sc->sc_readbytes = 0; 900 sc->sc_wrotebytes = 0; 901 } 902 } 903 904 static void 905 g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb) 906 { 907 uint32_t *version; 908 909 g_topology_assert(); 910 911 version = gctl_get_paraml(req, "version", sizeof(*version)); 912 if (version == NULL) { 913 gctl_error(req, "No '%s' argument.", "version"); 914 return; 915 } 916 if (*version != G_NOP_VERSION) { 917 gctl_error(req, "Userland and kernel parts are out of sync."); 918 return; 919 } 920 921 if (strcmp(verb, "create") == 0) { 922 g_nop_ctl_create(req, mp); 923 return; 924 } else if (strcmp(verb, "configure") == 0) { 925 g_nop_ctl_configure(req, mp); 926 return; 927 } else if (strcmp(verb, "destroy") == 0) { 928 g_nop_ctl_destroy(req, mp); 929 return; 930 } else if (strcmp(verb, "reset") == 0) { 931 g_nop_ctl_reset(req, mp); 932 return; 933 } 934 935 gctl_error(req, "Unknown verb."); 936 } 937 938 static void 939 g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 940 struct g_consumer *cp, struct g_provider *pp) 941 { 942 struct g_nop_softc *sc; 943 944 if (pp != NULL || cp != NULL) 945 return; 946 sc = gp->softc; 947 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent, 948 (intmax_t)sc->sc_offset); 949 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent, 950 sc->sc_rfailprob); 951 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent, 952 sc->sc_wfailprob); 953 sbuf_printf(sb, "%s<ReadDelayedProb>%u</ReadDelayedProb>\n", indent, 954 sc->sc_rdelayprob); 955 sbuf_printf(sb, "%s<WriteDelayedProb>%u</WriteDelayedProb>\n", indent, 956 sc->sc_wdelayprob); 957 sbuf_printf(sb, "%s<Delay>%d</Delay>\n", indent, sc->sc_delaymsec); 958 sbuf_printf(sb, "%s<CountUntilFail>%u</CountUntilFail>\n", indent, 959 sc->sc_count_until_fail); 960 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error); 961 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads); 962 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes); 963 sbuf_printf(sb, "%s<Deletes>%ju</Deletes>\n", indent, sc->sc_deletes); 964 sbuf_printf(sb, "%s<Getattrs>%ju</Getattrs>\n", indent, sc->sc_getattrs); 965 sbuf_printf(sb, "%s<Flushes>%ju</Flushes>\n", indent, sc->sc_flushes); 966 sbuf_printf(sb, "%s<Speedups>%ju</Speedups>\n", indent, sc->sc_speedups); 967 sbuf_printf(sb, "%s<Cmd0s>%ju</Cmd0s>\n", indent, sc->sc_cmd0s); 968 sbuf_printf(sb, "%s<Cmd1s>%ju</Cmd1s>\n", indent, sc->sc_cmd1s); 969 sbuf_printf(sb, "%s<Cmd2s>%ju</Cmd2s>\n", indent, sc->sc_cmd2s); 970 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent, 971 sc->sc_readbytes); 972 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent, 973 sc->sc_wrotebytes); 974 } 975 976 DECLARE_GEOM_CLASS(g_nop_class, g_nop); 977 MODULE_VERSION(geom_nop, 0);
Cache object: ee2f87e4b36bf877f173bb03a20a1d1e
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