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 49 SYSCTL_DECL(_kern_geom); 50 static SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW, 0, "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, vm_offset_t physical, off_t offset, 134 size_t length) 135 { 136 137 return (0); 138 } 139 140 static void 141 g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc) 142 { 143 struct g_kerneldump *gkd; 144 struct g_geom *gp; 145 struct g_provider *pp; 146 147 gkd = (struct g_kerneldump *)bp->bio_data; 148 gp = bp->bio_to->geom; 149 g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name, 150 (intmax_t)gkd->offset, (intmax_t)gkd->length); 151 152 pp = LIST_FIRST(&gp->provider); 153 154 gkd->di.dumper = g_nop_dumper; 155 gkd->di.priv = sc; 156 gkd->di.blocksize = pp->sectorsize; 157 gkd->di.maxiosize = DFLTPHYS; 158 gkd->di.mediaoffset = sc->sc_offset + gkd->offset; 159 if (gkd->offset > sc->sc_explicitsize) { 160 g_io_deliver(bp, ENODEV); 161 return; 162 } 163 if (gkd->offset + gkd->length > sc->sc_explicitsize) 164 gkd->length = sc->sc_explicitsize - gkd->offset; 165 gkd->di.mediasize = gkd->length; 166 g_io_deliver(bp, 0); 167 } 168 169 static void 170 g_nop_pass(struct bio *cbp, struct g_geom *gp) 171 { 172 173 G_NOP_LOGREQ(cbp, "Sending request."); 174 g_io_request(cbp, LIST_FIRST(&gp->consumer)); 175 } 176 177 static void 178 g_nop_pass_timeout(void *data) 179 { 180 struct g_nop_softc *sc; 181 struct g_geom *gp; 182 struct g_nop_delay *gndelay; 183 184 gndelay = (struct g_nop_delay *)data; 185 186 gp = gndelay->dl_bio->bio_to->geom; 187 sc = gp->softc; 188 189 mtx_lock(&sc->sc_lock); 190 TAILQ_REMOVE(&sc->sc_head_delay, gndelay, dl_next); 191 mtx_unlock(&sc->sc_lock); 192 193 g_nop_pass(gndelay->dl_bio, gp); 194 195 g_free(data); 196 } 197 198 static void 199 g_nop_start(struct bio *bp) 200 { 201 struct g_nop_softc *sc; 202 struct g_geom *gp; 203 struct g_provider *pp; 204 struct bio *cbp; 205 u_int failprob, delayprob, delaytime; 206 207 failprob = delayprob = delaytime = 0; 208 209 gp = bp->bio_to->geom; 210 sc = gp->softc; 211 212 G_NOP_LOGREQ(bp, "Request received."); 213 mtx_lock(&sc->sc_lock); 214 switch (bp->bio_cmd) { 215 case BIO_READ: 216 sc->sc_reads++; 217 sc->sc_readbytes += bp->bio_length; 218 if (sc->sc_count_until_fail != 0) { 219 sc->sc_count_until_fail -= 1; 220 } else { 221 failprob = sc->sc_rfailprob; 222 delayprob = sc->sc_rdelayprob; 223 delaytime = sc->sc_delaymsec; 224 } 225 break; 226 case BIO_WRITE: 227 sc->sc_writes++; 228 sc->sc_wrotebytes += bp->bio_length; 229 if (sc->sc_count_until_fail != 0) { 230 sc->sc_count_until_fail -= 1; 231 } else { 232 failprob = sc->sc_wfailprob; 233 delayprob = sc->sc_wdelayprob; 234 delaytime = sc->sc_delaymsec; 235 } 236 break; 237 case BIO_DELETE: 238 sc->sc_deletes++; 239 break; 240 case BIO_GETATTR: 241 sc->sc_getattrs++; 242 if (sc->sc_physpath && 243 g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) 244 ; 245 else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0) 246 g_nop_kerneldump(bp, sc); 247 else 248 /* 249 * Fallthrough to forwarding the GETATTR down to the 250 * lower level device. 251 */ 252 break; 253 mtx_unlock(&sc->sc_lock); 254 return; 255 case BIO_FLUSH: 256 sc->sc_flushes++; 257 break; 258 case BIO_SPEEDUP: 259 sc->sc_speedups++; 260 break; 261 case BIO_CMD0: 262 sc->sc_cmd0s++; 263 break; 264 case BIO_CMD1: 265 sc->sc_cmd1s++; 266 break; 267 case BIO_CMD2: 268 sc->sc_cmd2s++; 269 break; 270 } 271 mtx_unlock(&sc->sc_lock); 272 273 if (failprob > 0) { 274 u_int rval; 275 276 rval = arc4random() % 100; 277 if (rval < failprob) { 278 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error); 279 g_io_deliver(bp, sc->sc_error); 280 return; 281 } 282 } 283 284 cbp = g_clone_bio(bp); 285 if (cbp == NULL) { 286 g_io_deliver(bp, ENOMEM); 287 return; 288 } 289 cbp->bio_done = g_std_done; 290 cbp->bio_offset = bp->bio_offset + sc->sc_offset; 291 pp = LIST_FIRST(&gp->provider); 292 KASSERT(pp != NULL, ("NULL pp")); 293 cbp->bio_to = pp; 294 295 if (delayprob > 0) { 296 struct g_nop_delay *gndelay; 297 u_int rval; 298 299 rval = arc4random() % 100; 300 if (rval < delayprob) { 301 gndelay = g_malloc(sizeof(*gndelay), M_NOWAIT | M_ZERO); 302 if (gndelay != NULL) { 303 callout_init(&gndelay->dl_cal, 1); 304 305 gndelay->dl_bio = cbp; 306 307 mtx_lock(&sc->sc_lock); 308 TAILQ_INSERT_TAIL(&sc->sc_head_delay, gndelay, 309 dl_next); 310 mtx_unlock(&sc->sc_lock); 311 312 callout_reset(&gndelay->dl_cal, 313 MSEC_2_TICKS(delaytime), g_nop_pass_timeout, 314 gndelay); 315 return; 316 } 317 } 318 } 319 320 g_nop_pass(cbp, gp); 321 } 322 323 static int 324 g_nop_access(struct g_provider *pp, int dr, int dw, int de) 325 { 326 struct g_geom *gp; 327 struct g_consumer *cp; 328 int error; 329 330 gp = pp->geom; 331 cp = LIST_FIRST(&gp->consumer); 332 error = g_access(cp, dr, dw, de); 333 334 return (error); 335 } 336 337 static int 338 g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp, 339 const char *gnopname, int ioerror, u_int count_until_fail, 340 u_int rfailprob, u_int wfailprob, u_int delaymsec, u_int rdelayprob, 341 u_int wdelayprob, off_t offset, off_t size, u_int secsize, off_t stripesize, 342 off_t stripeoffset, const char *physpath) 343 { 344 struct g_nop_softc *sc; 345 struct g_geom *gp; 346 struct g_provider *newpp; 347 struct g_consumer *cp; 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; 460 461 cp = g_new_consumer(gp); 462 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 463 error = g_attach(cp, pp); 464 if (error != 0) { 465 gctl_error(req, "Cannot attach to provider %s.", pp->name); 466 goto fail; 467 } 468 469 newpp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 470 g_error_provider(newpp, 0); 471 G_NOP_DEBUG(0, "Device %s created.", gp->name); 472 return (0); 473 fail: 474 if (cp->provider != NULL) 475 g_detach(cp); 476 g_destroy_consumer(cp); 477 g_destroy_provider(newpp); 478 mtx_destroy(&sc->sc_lock); 479 free(sc->sc_physpath, M_GEOM); 480 g_free(gp->softc); 481 g_destroy_geom(gp); 482 return (error); 483 } 484 485 static void 486 g_nop_providergone(struct g_provider *pp) 487 { 488 struct g_geom *gp = pp->geom; 489 struct g_nop_softc *sc = gp->softc; 490 491 KASSERT(TAILQ_EMPTY(&sc->sc_head_delay), 492 ("delayed request list is not empty")); 493 494 gp->softc = NULL; 495 free(sc->sc_physpath, M_GEOM); 496 mtx_destroy(&sc->sc_lock); 497 g_free(sc); 498 } 499 500 static int 501 g_nop_destroy(struct g_geom *gp, boolean_t force) 502 { 503 struct g_nop_softc *sc; 504 struct g_provider *pp; 505 506 g_topology_assert(); 507 sc = gp->softc; 508 if (sc == NULL) 509 return (ENXIO); 510 pp = LIST_FIRST(&gp->provider); 511 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 512 if (force) { 513 G_NOP_DEBUG(0, "Device %s is still open, so it " 514 "can't be definitely removed.", pp->name); 515 } else { 516 G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).", 517 pp->name, pp->acr, pp->acw, pp->ace); 518 return (EBUSY); 519 } 520 } else { 521 G_NOP_DEBUG(0, "Device %s removed.", gp->name); 522 } 523 524 g_wither_geom(gp, ENXIO); 525 526 return (0); 527 } 528 529 static int 530 g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 531 { 532 533 return (g_nop_destroy(gp, 0)); 534 } 535 536 static void 537 g_nop_ctl_create(struct gctl_req *req, struct g_class *mp) 538 { 539 struct g_provider *pp; 540 intmax_t *val, error, rfailprob, wfailprob, count_until_fail, offset, 541 secsize, size, stripesize, stripeoffset, delaymsec, 542 rdelayprob, wdelayprob; 543 const char *name, *physpath, *gnopname; 544 char param[16]; 545 int i, *nargs; 546 547 g_topology_assert(); 548 549 error = -1; 550 rfailprob = -1; 551 wfailprob = -1; 552 count_until_fail = -1; 553 offset = 0; 554 secsize = 0; 555 size = 0; 556 stripesize = 0; 557 stripeoffset = 0; 558 delaymsec = -1; 559 rdelayprob = -1; 560 wdelayprob = -1; 561 562 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 563 if (nargs == NULL) { 564 gctl_error(req, "No '%s' argument", "nargs"); 565 return; 566 } 567 if (*nargs <= 0) { 568 gctl_error(req, "Missing device(s)."); 569 return; 570 } 571 val = gctl_get_paraml_opt(req, "error", sizeof(*val)); 572 if (val != NULL) { 573 error = *val; 574 } 575 val = gctl_get_paraml_opt(req, "rfailprob", sizeof(*val)); 576 if (val != NULL) { 577 rfailprob = *val; 578 if (rfailprob < -1 || rfailprob > 100) { 579 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 580 return; 581 } 582 } 583 val = gctl_get_paraml_opt(req, "wfailprob", sizeof(*val)); 584 if (val != NULL) { 585 wfailprob = *val; 586 if (wfailprob < -1 || wfailprob > 100) { 587 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 588 return; 589 } 590 } 591 val = gctl_get_paraml_opt(req, "delaymsec", sizeof(*val)); 592 if (val != NULL) { 593 delaymsec = *val; 594 if (delaymsec < 1 && delaymsec != -1) { 595 gctl_error(req, "Invalid '%s' argument", "delaymsec"); 596 return; 597 } 598 } 599 val = gctl_get_paraml_opt(req, "rdelayprob", sizeof(*val)); 600 if (val != NULL) { 601 rdelayprob = *val; 602 if (rdelayprob < -1 || rdelayprob > 100) { 603 gctl_error(req, "Invalid '%s' argument", "rdelayprob"); 604 return; 605 } 606 } 607 val = gctl_get_paraml_opt(req, "wdelayprob", sizeof(*val)); 608 if (val != NULL) { 609 wdelayprob = *val; 610 if (wdelayprob < -1 || wdelayprob > 100) { 611 gctl_error(req, "Invalid '%s' argument", "wdelayprob"); 612 return; 613 } 614 } 615 val = gctl_get_paraml_opt(req, "count_until_fail", sizeof(*val)); 616 if (val != NULL) { 617 count_until_fail = *val; 618 if (count_until_fail < -1) { 619 gctl_error(req, "Invalid '%s' argument", 620 "count_until_fail"); 621 return; 622 } 623 } 624 val = gctl_get_paraml_opt(req, "offset", sizeof(*val)); 625 if (val != NULL) { 626 offset = *val; 627 if (offset < 0) { 628 gctl_error(req, "Invalid '%s' argument", "offset"); 629 return; 630 } 631 } 632 val = gctl_get_paraml_opt(req, "size", sizeof(*val)); 633 if (val != NULL) { 634 size = *val; 635 if (size < 0) { 636 gctl_error(req, "Invalid '%s' argument", "size"); 637 return; 638 } 639 } 640 val = gctl_get_paraml_opt(req, "secsize", sizeof(*val)); 641 if (val != NULL) { 642 secsize = *val; 643 if (secsize < 0) { 644 gctl_error(req, "Invalid '%s' argument", "secsize"); 645 return; 646 } 647 } 648 val = gctl_get_paraml_opt(req, "stripesize", sizeof(*val)); 649 if (val != NULL) { 650 stripesize = *val; 651 if (stripesize < 0) { 652 gctl_error(req, "Invalid '%s' argument", "stripesize"); 653 return; 654 } 655 } 656 val = gctl_get_paraml_opt(req, "stripeoffset", sizeof(*val)); 657 if (val != NULL) { 658 stripeoffset = *val; 659 if (stripeoffset < 0) { 660 gctl_error(req, "Invalid '%s' argument", 661 "stripeoffset"); 662 return; 663 } 664 } 665 physpath = gctl_get_asciiparam(req, "physpath"); 666 gnopname = gctl_get_asciiparam(req, "gnopname"); 667 668 for (i = 0; i < *nargs; i++) { 669 snprintf(param, sizeof(param), "arg%d", i); 670 name = gctl_get_asciiparam(req, param); 671 if (name == NULL) { 672 gctl_error(req, "No 'arg%d' argument", i); 673 return; 674 } 675 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 676 name += strlen("/dev/"); 677 pp = g_provider_by_name(name); 678 if (pp == NULL) { 679 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 680 gctl_error(req, "Provider %s is invalid.", name); 681 return; 682 } 683 if (g_nop_create(req, mp, pp, 684 gnopname, 685 error == -1 ? EIO : (int)error, 686 count_until_fail == -1 ? 0 : (u_int)count_until_fail, 687 rfailprob == -1 ? 0 : (u_int)rfailprob, 688 wfailprob == -1 ? 0 : (u_int)wfailprob, 689 delaymsec == -1 ? 1 : (u_int)delaymsec, 690 rdelayprob == -1 ? 0 : (u_int)rdelayprob, 691 wdelayprob == -1 ? 0 : (u_int)wdelayprob, 692 (off_t)offset, (off_t)size, (u_int)secsize, 693 (off_t)stripesize, (off_t)stripeoffset, 694 physpath) != 0) { 695 return; 696 } 697 } 698 } 699 700 static void 701 g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp) 702 { 703 struct g_nop_softc *sc; 704 struct g_provider *pp; 705 intmax_t *val, delaymsec, error, rdelayprob, rfailprob, wdelayprob, 706 wfailprob, count_until_fail; 707 const char *name; 708 char param[16]; 709 int i, *nargs; 710 711 g_topology_assert(); 712 713 count_until_fail = -1; 714 delaymsec = -1; 715 error = -1; 716 rdelayprob = -1; 717 rfailprob = -1; 718 wdelayprob = -1; 719 wfailprob = -1; 720 721 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 722 if (nargs == NULL) { 723 gctl_error(req, "No '%s' argument", "nargs"); 724 return; 725 } 726 if (*nargs <= 0) { 727 gctl_error(req, "Missing device(s)."); 728 return; 729 } 730 val = gctl_get_paraml_opt(req, "error", sizeof(*val)); 731 if (val != NULL) { 732 error = *val; 733 } 734 val = gctl_get_paraml_opt(req, "count_until_fail", sizeof(*val)); 735 if (val != NULL) { 736 count_until_fail = *val; 737 } 738 val = gctl_get_paraml_opt(req, "rfailprob", sizeof(*val)); 739 if (val != NULL) { 740 rfailprob = *val; 741 if (rfailprob < -1 || rfailprob > 100) { 742 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 743 return; 744 } 745 } 746 val = gctl_get_paraml_opt(req, "wfailprob", sizeof(*val)); 747 if (val != NULL) { 748 wfailprob = *val; 749 if (wfailprob < -1 || wfailprob > 100) { 750 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 751 return; 752 } 753 } 754 val = gctl_get_paraml_opt(req, "delaymsec", sizeof(*val)); 755 if (val != NULL) { 756 delaymsec = *val; 757 if (delaymsec < 1 && delaymsec != -1) { 758 gctl_error(req, "Invalid '%s' argument", "delaymsec"); 759 return; 760 } 761 } 762 val = gctl_get_paraml_opt(req, "rdelayprob", sizeof(*val)); 763 if (val != NULL) { 764 rdelayprob = *val; 765 if (rdelayprob < -1 || rdelayprob > 100) { 766 gctl_error(req, "Invalid '%s' argument", "rdelayprob"); 767 return; 768 } 769 } 770 val = gctl_get_paraml_opt(req, "wdelayprob", sizeof(*val)); 771 if (val != NULL) { 772 wdelayprob = *val; 773 if (wdelayprob < -1 || wdelayprob > 100) { 774 gctl_error(req, "Invalid '%s' argument", "wdelayprob"); 775 return; 776 } 777 } 778 779 for (i = 0; i < *nargs; i++) { 780 snprintf(param, sizeof(param), "arg%d", i); 781 name = gctl_get_asciiparam(req, param); 782 if (name == NULL) { 783 gctl_error(req, "No 'arg%d' argument", i); 784 return; 785 } 786 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 787 name += strlen("/dev/"); 788 pp = g_provider_by_name(name); 789 if (pp == NULL || pp->geom->class != mp) { 790 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 791 gctl_error(req, "Provider %s is invalid.", name); 792 return; 793 } 794 sc = pp->geom->softc; 795 if (error != -1) 796 sc->sc_error = (int)error; 797 if (rfailprob != -1) 798 sc->sc_rfailprob = (u_int)rfailprob; 799 if (wfailprob != -1) 800 sc->sc_wfailprob = (u_int)wfailprob; 801 if (rdelayprob != -1) 802 sc->sc_rdelayprob = (u_int)rdelayprob; 803 if (wdelayprob != -1) 804 sc->sc_wdelayprob = (u_int)wdelayprob; 805 if (delaymsec != -1) 806 sc->sc_delaymsec = (u_int)delaymsec; 807 if (count_until_fail != -1) 808 sc->sc_count_until_fail = (u_int)count_until_fail; 809 } 810 } 811 812 static struct g_geom * 813 g_nop_find_geom(struct g_class *mp, const char *name) 814 { 815 struct g_geom *gp; 816 817 LIST_FOREACH(gp, &mp->geom, geom) { 818 if (strcmp(gp->name, name) == 0) 819 return (gp); 820 } 821 return (NULL); 822 } 823 824 static void 825 g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp) 826 { 827 int *nargs, *force, error, i; 828 struct g_geom *gp; 829 const char *name; 830 char param[16]; 831 832 g_topology_assert(); 833 834 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 835 if (nargs == NULL) { 836 gctl_error(req, "No '%s' argument", "nargs"); 837 return; 838 } 839 if (*nargs <= 0) { 840 gctl_error(req, "Missing device(s)."); 841 return; 842 } 843 force = gctl_get_paraml(req, "force", sizeof(*force)); 844 if (force == NULL) { 845 gctl_error(req, "No 'force' argument"); 846 return; 847 } 848 849 for (i = 0; i < *nargs; i++) { 850 snprintf(param, sizeof(param), "arg%d", i); 851 name = gctl_get_asciiparam(req, param); 852 if (name == NULL) { 853 gctl_error(req, "No 'arg%d' argument", i); 854 return; 855 } 856 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 857 name += strlen("/dev/"); 858 gp = g_nop_find_geom(mp, name); 859 if (gp == NULL) { 860 G_NOP_DEBUG(1, "Device %s is invalid.", name); 861 gctl_error(req, "Device %s is invalid.", name); 862 return; 863 } 864 error = g_nop_destroy(gp, *force); 865 if (error != 0) { 866 gctl_error(req, "Cannot destroy device %s (error=%d).", 867 gp->name, error); 868 return; 869 } 870 } 871 } 872 873 static void 874 g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp) 875 { 876 struct g_nop_softc *sc; 877 struct g_provider *pp; 878 const char *name; 879 char param[16]; 880 int i, *nargs; 881 882 g_topology_assert(); 883 884 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 885 if (nargs == NULL) { 886 gctl_error(req, "No '%s' argument", "nargs"); 887 return; 888 } 889 if (*nargs <= 0) { 890 gctl_error(req, "Missing device(s)."); 891 return; 892 } 893 894 for (i = 0; i < *nargs; i++) { 895 snprintf(param, sizeof(param), "arg%d", i); 896 name = gctl_get_asciiparam(req, param); 897 if (name == NULL) { 898 gctl_error(req, "No 'arg%d' argument", i); 899 return; 900 } 901 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 902 name += strlen("/dev/"); 903 pp = g_provider_by_name(name); 904 if (pp == NULL || pp->geom->class != mp) { 905 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 906 gctl_error(req, "Provider %s is invalid.", name); 907 return; 908 } 909 sc = pp->geom->softc; 910 sc->sc_reads = 0; 911 sc->sc_writes = 0; 912 sc->sc_deletes = 0; 913 sc->sc_getattrs = 0; 914 sc->sc_flushes = 0; 915 sc->sc_speedups = 0; 916 sc->sc_cmd0s = 0; 917 sc->sc_cmd1s = 0; 918 sc->sc_cmd2s = 0; 919 sc->sc_readbytes = 0; 920 sc->sc_wrotebytes = 0; 921 } 922 } 923 924 static void 925 g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb) 926 { 927 uint32_t *version; 928 929 g_topology_assert(); 930 931 version = gctl_get_paraml(req, "version", sizeof(*version)); 932 if (version == NULL) { 933 gctl_error(req, "No '%s' argument.", "version"); 934 return; 935 } 936 if (*version != G_NOP_VERSION) { 937 gctl_error(req, "Userland and kernel parts are out of sync."); 938 return; 939 } 940 941 if (strcmp(verb, "create") == 0) { 942 g_nop_ctl_create(req, mp); 943 return; 944 } else if (strcmp(verb, "configure") == 0) { 945 g_nop_ctl_configure(req, mp); 946 return; 947 } else if (strcmp(verb, "destroy") == 0) { 948 g_nop_ctl_destroy(req, mp); 949 return; 950 } else if (strcmp(verb, "reset") == 0) { 951 g_nop_ctl_reset(req, mp); 952 return; 953 } 954 955 gctl_error(req, "Unknown verb."); 956 } 957 958 static void 959 g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 960 struct g_consumer *cp, struct g_provider *pp) 961 { 962 struct g_nop_softc *sc; 963 964 if (pp != NULL || cp != NULL) 965 return; 966 sc = gp->softc; 967 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent, 968 (intmax_t)sc->sc_offset); 969 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent, 970 sc->sc_rfailprob); 971 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent, 972 sc->sc_wfailprob); 973 sbuf_printf(sb, "%s<ReadDelayedProb>%u</ReadDelayedProb>\n", indent, 974 sc->sc_rdelayprob); 975 sbuf_printf(sb, "%s<WriteDelayedProb>%u</WriteDelayedProb>\n", indent, 976 sc->sc_wdelayprob); 977 sbuf_printf(sb, "%s<Delay>%d</Delay>\n", indent, sc->sc_delaymsec); 978 sbuf_printf(sb, "%s<CountUntilFail>%u</CountUntilFail>\n", indent, 979 sc->sc_count_until_fail); 980 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error); 981 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads); 982 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes); 983 sbuf_printf(sb, "%s<Deletes>%ju</Deletes>\n", indent, sc->sc_deletes); 984 sbuf_printf(sb, "%s<Getattrs>%ju</Getattrs>\n", indent, sc->sc_getattrs); 985 sbuf_printf(sb, "%s<Flushes>%ju</Flushes>\n", indent, sc->sc_flushes); 986 sbuf_printf(sb, "%s<Speedups>%ju</Speedups>\n", indent, sc->sc_speedups); 987 sbuf_printf(sb, "%s<Cmd0s>%ju</Cmd0s>\n", indent, sc->sc_cmd0s); 988 sbuf_printf(sb, "%s<Cmd1s>%ju</Cmd1s>\n", indent, sc->sc_cmd1s); 989 sbuf_printf(sb, "%s<Cmd2s>%ju</Cmd2s>\n", indent, sc->sc_cmd2s); 990 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent, 991 sc->sc_readbytes); 992 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent, 993 sc->sc_wrotebytes); 994 } 995 996 DECLARE_GEOM_CLASS(g_nop_class, g_nop); 997 MODULE_VERSION(geom_nop, 0); 998