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