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/nop/g_nop.h> 44 45 46 SYSCTL_DECL(_kern_geom); 47 static SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW, 0, "GEOM_NOP stuff"); 48 static u_int g_nop_debug = 0; 49 SYSCTL_UINT(_kern_geom_nop, OID_AUTO, debug, CTLFLAG_RW, &g_nop_debug, 0, 50 "Debug level"); 51 52 static int g_nop_destroy(struct g_geom *gp, boolean_t force); 53 static int g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, 54 struct g_geom *gp); 55 static void g_nop_config(struct gctl_req *req, struct g_class *mp, 56 const char *verb); 57 static void g_nop_dumpconf(struct sbuf *sb, const char *indent, 58 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 59 60 struct g_class g_nop_class = { 61 .name = G_NOP_CLASS_NAME, 62 .version = G_VERSION, 63 .ctlreq = g_nop_config, 64 .destroy_geom = g_nop_destroy_geom 65 }; 66 67 68 static void 69 g_nop_orphan(struct g_consumer *cp) 70 { 71 72 g_topology_assert(); 73 g_nop_destroy(cp->geom, 1); 74 } 75 76 static void 77 g_nop_resize(struct g_consumer *cp) 78 { 79 struct g_nop_softc *sc; 80 struct g_geom *gp; 81 struct g_provider *pp; 82 off_t size; 83 84 g_topology_assert(); 85 86 gp = cp->geom; 87 sc = gp->softc; 88 89 if (sc->sc_explicitsize != 0) 90 return; 91 if (cp->provider->mediasize < sc->sc_offset) { 92 g_nop_destroy(gp, 1); 93 return; 94 } 95 size = cp->provider->mediasize - sc->sc_offset; 96 LIST_FOREACH(pp, &gp->provider, provider) 97 g_resize_provider(pp, size); 98 } 99 100 static int 101 g_nop_dumper(void *priv, void *virtual, vm_offset_t physical, off_t offset, 102 size_t length) 103 { 104 return (0); 105 } 106 107 static void 108 g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc) 109 { 110 struct g_kerneldump *gkd; 111 struct g_geom *gp; 112 struct g_provider *pp; 113 114 gkd = (struct g_kerneldump *)bp->bio_data; 115 gp = bp->bio_to->geom; 116 g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name, 117 (intmax_t)gkd->offset, (intmax_t)gkd->length); 118 119 pp = LIST_FIRST(&gp->provider); 120 121 gkd->di.dumper = g_nop_dumper; 122 gkd->di.priv = sc; 123 gkd->di.blocksize = pp->sectorsize; 124 gkd->di.maxiosize = DFLTPHYS; 125 gkd->di.mediaoffset = sc->sc_offset + gkd->offset; 126 if (gkd->offset > sc->sc_explicitsize) { 127 g_io_deliver(bp, ENODEV); 128 return; 129 } 130 if (gkd->offset + gkd->length > sc->sc_explicitsize) 131 gkd->length = sc->sc_explicitsize - gkd->offset; 132 gkd->di.mediasize = gkd->length; 133 g_io_deliver(bp, 0); 134 } 135 136 static void 137 g_nop_start(struct bio *bp) 138 { 139 struct g_nop_softc *sc; 140 struct g_geom *gp; 141 struct g_provider *pp; 142 struct bio *cbp; 143 u_int failprob = 0; 144 145 gp = bp->bio_to->geom; 146 sc = gp->softc; 147 G_NOP_LOGREQ(bp, "Request received."); 148 mtx_lock(&sc->sc_lock); 149 switch (bp->bio_cmd) { 150 case BIO_READ: 151 sc->sc_reads++; 152 sc->sc_readbytes += bp->bio_length; 153 failprob = sc->sc_rfailprob; 154 break; 155 case BIO_WRITE: 156 sc->sc_writes++; 157 sc->sc_wrotebytes += bp->bio_length; 158 failprob = sc->sc_wfailprob; 159 break; 160 case BIO_DELETE: 161 sc->sc_deletes++; 162 break; 163 case BIO_GETATTR: 164 sc->sc_getattrs++; 165 if (sc->sc_physpath && 166 g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) 167 ; 168 else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0) 169 g_nop_kerneldump(bp, sc); 170 else 171 /* 172 * Fallthrough to forwarding the GETATTR down to the 173 * lower level device. 174 */ 175 break; 176 mtx_unlock(&sc->sc_lock); 177 return; 178 case BIO_FLUSH: 179 sc->sc_flushes++; 180 break; 181 case BIO_CMD0: 182 sc->sc_cmd0s++; 183 break; 184 case BIO_CMD1: 185 sc->sc_cmd1s++; 186 break; 187 case BIO_CMD2: 188 sc->sc_cmd2s++; 189 break; 190 } 191 mtx_unlock(&sc->sc_lock); 192 if (failprob > 0) { 193 u_int rval; 194 195 rval = arc4random() % 100; 196 if (rval < failprob) { 197 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error); 198 g_io_deliver(bp, sc->sc_error); 199 return; 200 } 201 } 202 cbp = g_clone_bio(bp); 203 if (cbp == NULL) { 204 g_io_deliver(bp, ENOMEM); 205 return; 206 } 207 cbp->bio_done = g_std_done; 208 cbp->bio_offset = bp->bio_offset + sc->sc_offset; 209 pp = LIST_FIRST(&gp->provider); 210 KASSERT(pp != NULL, ("NULL pp")); 211 cbp->bio_to = pp; 212 G_NOP_LOGREQ(cbp, "Sending request."); 213 g_io_request(cbp, LIST_FIRST(&gp->consumer)); 214 } 215 216 static int 217 g_nop_access(struct g_provider *pp, int dr, int dw, int de) 218 { 219 struct g_geom *gp; 220 struct g_consumer *cp; 221 int error; 222 223 gp = pp->geom; 224 cp = LIST_FIRST(&gp->consumer); 225 error = g_access(cp, dr, dw, de); 226 227 return (error); 228 } 229 230 static int 231 g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp, 232 int ioerror, u_int rfailprob, u_int wfailprob, off_t offset, off_t size, 233 u_int secsize, off_t stripesize, off_t stripeoffset, const char *physpath) 234 { 235 struct g_nop_softc *sc; 236 struct g_geom *gp; 237 struct g_provider *newpp; 238 struct g_consumer *cp; 239 char name[64]; 240 int error; 241 off_t explicitsize; 242 243 g_topology_assert(); 244 245 gp = NULL; 246 newpp = NULL; 247 cp = NULL; 248 249 if ((offset % pp->sectorsize) != 0) { 250 gctl_error(req, "Invalid offset for provider %s.", pp->name); 251 return (EINVAL); 252 } 253 if ((size % pp->sectorsize) != 0) { 254 gctl_error(req, "Invalid size for provider %s.", pp->name); 255 return (EINVAL); 256 } 257 if (offset >= pp->mediasize) { 258 gctl_error(req, "Invalid offset for provider %s.", pp->name); 259 return (EINVAL); 260 } 261 explicitsize = size; 262 if (size == 0) 263 size = pp->mediasize - offset; 264 if (offset + size > pp->mediasize) { 265 gctl_error(req, "Invalid size for provider %s.", pp->name); 266 return (EINVAL); 267 } 268 if (secsize == 0) 269 secsize = pp->sectorsize; 270 else if ((secsize % pp->sectorsize) != 0) { 271 gctl_error(req, "Invalid secsize for provider %s.", pp->name); 272 return (EINVAL); 273 } 274 if (secsize > MAXPHYS) { 275 gctl_error(req, "secsize is too big."); 276 return (EINVAL); 277 } 278 size -= size % secsize; 279 if ((stripesize % pp->sectorsize) != 0) { 280 gctl_error(req, "Invalid stripesize for provider %s.", pp->name); 281 return (EINVAL); 282 } 283 if ((stripeoffset % pp->sectorsize) != 0) { 284 gctl_error(req, "Invalid stripeoffset for provider %s.", pp->name); 285 return (EINVAL); 286 } 287 if (stripesize != 0 && stripeoffset >= stripesize) { 288 gctl_error(req, "stripeoffset is too big."); 289 return (EINVAL); 290 } 291 snprintf(name, sizeof(name), "%s%s", pp->name, G_NOP_SUFFIX); 292 LIST_FOREACH(gp, &mp->geom, geom) { 293 if (strcmp(gp->name, name) == 0) { 294 gctl_error(req, "Provider %s already exists.", name); 295 return (EEXIST); 296 } 297 } 298 gp = g_new_geomf(mp, "%s", name); 299 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 300 sc->sc_offset = offset; 301 sc->sc_explicitsize = explicitsize; 302 sc->sc_stripesize = stripesize; 303 sc->sc_stripeoffset = stripeoffset; 304 if (physpath && strcmp(physpath, G_NOP_PHYSPATH_PASSTHROUGH)) { 305 sc->sc_physpath = strndup(physpath, MAXPATHLEN, M_GEOM); 306 } else 307 sc->sc_physpath = NULL; 308 sc->sc_error = ioerror; 309 sc->sc_rfailprob = rfailprob; 310 sc->sc_wfailprob = wfailprob; 311 sc->sc_reads = 0; 312 sc->sc_writes = 0; 313 sc->sc_deletes = 0; 314 sc->sc_getattrs = 0; 315 sc->sc_flushes = 0; 316 sc->sc_cmd0s = 0; 317 sc->sc_cmd1s = 0; 318 sc->sc_cmd2s = 0; 319 sc->sc_readbytes = 0; 320 sc->sc_wrotebytes = 0; 321 mtx_init(&sc->sc_lock, "gnop lock", NULL, MTX_DEF); 322 gp->softc = sc; 323 gp->start = g_nop_start; 324 gp->orphan = g_nop_orphan; 325 gp->resize = g_nop_resize; 326 gp->access = g_nop_access; 327 gp->dumpconf = g_nop_dumpconf; 328 329 newpp = g_new_providerf(gp, "%s", gp->name); 330 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE; 331 newpp->mediasize = size; 332 newpp->sectorsize = secsize; 333 newpp->stripesize = stripesize; 334 newpp->stripeoffset = stripeoffset; 335 336 cp = g_new_consumer(gp); 337 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 338 error = g_attach(cp, pp); 339 if (error != 0) { 340 gctl_error(req, "Cannot attach to provider %s.", pp->name); 341 goto fail; 342 } 343 344 newpp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 345 g_error_provider(newpp, 0); 346 G_NOP_DEBUG(0, "Device %s created.", gp->name); 347 return (0); 348 fail: 349 if (cp->provider != NULL) 350 g_detach(cp); 351 g_destroy_consumer(cp); 352 g_destroy_provider(newpp); 353 mtx_destroy(&sc->sc_lock); 354 free(sc->sc_physpath, M_GEOM); 355 g_free(gp->softc); 356 g_destroy_geom(gp); 357 return (error); 358 } 359 360 static int 361 g_nop_destroy(struct g_geom *gp, boolean_t force) 362 { 363 struct g_nop_softc *sc; 364 struct g_provider *pp; 365 366 g_topology_assert(); 367 sc = gp->softc; 368 if (sc == NULL) 369 return (ENXIO); 370 free(sc->sc_physpath, M_GEOM); 371 pp = LIST_FIRST(&gp->provider); 372 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 373 if (force) { 374 G_NOP_DEBUG(0, "Device %s is still open, so it " 375 "can't be definitely removed.", pp->name); 376 } else { 377 G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).", 378 pp->name, pp->acr, pp->acw, pp->ace); 379 return (EBUSY); 380 } 381 } else { 382 G_NOP_DEBUG(0, "Device %s removed.", gp->name); 383 } 384 gp->softc = NULL; 385 mtx_destroy(&sc->sc_lock); 386 g_free(sc); 387 g_wither_geom(gp, ENXIO); 388 389 return (0); 390 } 391 392 static int 393 g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 394 { 395 396 return (g_nop_destroy(gp, 0)); 397 } 398 399 static void 400 g_nop_ctl_create(struct gctl_req *req, struct g_class *mp) 401 { 402 struct g_provider *pp; 403 intmax_t *error, *rfailprob, *wfailprob, *offset, *secsize, *size, 404 *stripesize, *stripeoffset; 405 const char *name, *physpath; 406 char param[16]; 407 int i, *nargs; 408 409 g_topology_assert(); 410 411 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 412 if (nargs == NULL) { 413 gctl_error(req, "No '%s' argument", "nargs"); 414 return; 415 } 416 if (*nargs <= 0) { 417 gctl_error(req, "Missing device(s)."); 418 return; 419 } 420 error = gctl_get_paraml(req, "error", sizeof(*error)); 421 if (error == NULL) { 422 gctl_error(req, "No '%s' argument", "error"); 423 return; 424 } 425 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 426 if (rfailprob == NULL) { 427 gctl_error(req, "No '%s' argument", "rfailprob"); 428 return; 429 } 430 if (*rfailprob < -1 || *rfailprob > 100) { 431 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 432 return; 433 } 434 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 435 if (wfailprob == NULL) { 436 gctl_error(req, "No '%s' argument", "wfailprob"); 437 return; 438 } 439 if (*wfailprob < -1 || *wfailprob > 100) { 440 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 441 return; 442 } 443 offset = gctl_get_paraml(req, "offset", sizeof(*offset)); 444 if (offset == NULL) { 445 gctl_error(req, "No '%s' argument", "offset"); 446 return; 447 } 448 if (*offset < 0) { 449 gctl_error(req, "Invalid '%s' argument", "offset"); 450 return; 451 } 452 size = gctl_get_paraml(req, "size", sizeof(*size)); 453 if (size == NULL) { 454 gctl_error(req, "No '%s' argument", "size"); 455 return; 456 } 457 if (*size < 0) { 458 gctl_error(req, "Invalid '%s' argument", "size"); 459 return; 460 } 461 secsize = gctl_get_paraml(req, "secsize", sizeof(*secsize)); 462 if (secsize == NULL) { 463 gctl_error(req, "No '%s' argument", "secsize"); 464 return; 465 } 466 if (*secsize < 0) { 467 gctl_error(req, "Invalid '%s' argument", "secsize"); 468 return; 469 } 470 stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize)); 471 if (stripesize == NULL) { 472 gctl_error(req, "No '%s' argument", "stripesize"); 473 return; 474 } 475 if (*stripesize < 0) { 476 gctl_error(req, "Invalid '%s' argument", "stripesize"); 477 return; 478 } 479 stripeoffset = gctl_get_paraml(req, "stripeoffset", sizeof(*stripeoffset)); 480 if (stripeoffset == NULL) { 481 gctl_error(req, "No '%s' argument", "stripeoffset"); 482 return; 483 } 484 if (*stripeoffset < 0) { 485 gctl_error(req, "Invalid '%s' argument", "stripeoffset"); 486 return; 487 } 488 physpath = gctl_get_asciiparam(req, "physpath"); 489 490 for (i = 0; i < *nargs; i++) { 491 snprintf(param, sizeof(param), "arg%d", i); 492 name = gctl_get_asciiparam(req, param); 493 if (name == NULL) { 494 gctl_error(req, "No 'arg%d' argument", i); 495 return; 496 } 497 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 498 name += strlen("/dev/"); 499 pp = g_provider_by_name(name); 500 if (pp == NULL) { 501 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 502 gctl_error(req, "Provider %s is invalid.", name); 503 return; 504 } 505 if (g_nop_create(req, mp, pp, 506 *error == -1 ? EIO : (int)*error, 507 *rfailprob == -1 ? 0 : (u_int)*rfailprob, 508 *wfailprob == -1 ? 0 : (u_int)*wfailprob, 509 (off_t)*offset, (off_t)*size, (u_int)*secsize, 510 (off_t)*stripesize, (off_t)*stripeoffset, 511 physpath) != 0) { 512 return; 513 } 514 } 515 } 516 517 static void 518 g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp) 519 { 520 struct g_nop_softc *sc; 521 struct g_provider *pp; 522 intmax_t *error, *rfailprob, *wfailprob; 523 const char *name; 524 char param[16]; 525 int i, *nargs; 526 527 g_topology_assert(); 528 529 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 530 if (nargs == NULL) { 531 gctl_error(req, "No '%s' argument", "nargs"); 532 return; 533 } 534 if (*nargs <= 0) { 535 gctl_error(req, "Missing device(s)."); 536 return; 537 } 538 error = gctl_get_paraml(req, "error", sizeof(*error)); 539 if (error == NULL) { 540 gctl_error(req, "No '%s' argument", "error"); 541 return; 542 } 543 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 544 if (rfailprob == NULL) { 545 gctl_error(req, "No '%s' argument", "rfailprob"); 546 return; 547 } 548 if (*rfailprob < -1 || *rfailprob > 100) { 549 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 550 return; 551 } 552 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 553 if (wfailprob == NULL) { 554 gctl_error(req, "No '%s' argument", "wfailprob"); 555 return; 556 } 557 if (*wfailprob < -1 || *wfailprob > 100) { 558 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 559 return; 560 } 561 562 for (i = 0; i < *nargs; i++) { 563 snprintf(param, sizeof(param), "arg%d", i); 564 name = gctl_get_asciiparam(req, param); 565 if (name == NULL) { 566 gctl_error(req, "No 'arg%d' argument", i); 567 return; 568 } 569 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 570 name += strlen("/dev/"); 571 pp = g_provider_by_name(name); 572 if (pp == NULL || pp->geom->class != mp) { 573 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 574 gctl_error(req, "Provider %s is invalid.", name); 575 return; 576 } 577 sc = pp->geom->softc; 578 if (*error != -1) 579 sc->sc_error = (int)*error; 580 if (*rfailprob != -1) 581 sc->sc_rfailprob = (u_int)*rfailprob; 582 if (*wfailprob != -1) 583 sc->sc_wfailprob = (u_int)*wfailprob; 584 } 585 } 586 587 static struct g_geom * 588 g_nop_find_geom(struct g_class *mp, const char *name) 589 { 590 struct g_geom *gp; 591 592 LIST_FOREACH(gp, &mp->geom, geom) { 593 if (strcmp(gp->name, name) == 0) 594 return (gp); 595 } 596 return (NULL); 597 } 598 599 static void 600 g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp) 601 { 602 int *nargs, *force, error, i; 603 struct g_geom *gp; 604 const char *name; 605 char param[16]; 606 607 g_topology_assert(); 608 609 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 610 if (nargs == NULL) { 611 gctl_error(req, "No '%s' argument", "nargs"); 612 return; 613 } 614 if (*nargs <= 0) { 615 gctl_error(req, "Missing device(s)."); 616 return; 617 } 618 force = gctl_get_paraml(req, "force", sizeof(*force)); 619 if (force == NULL) { 620 gctl_error(req, "No 'force' argument"); 621 return; 622 } 623 624 for (i = 0; i < *nargs; i++) { 625 snprintf(param, sizeof(param), "arg%d", i); 626 name = gctl_get_asciiparam(req, param); 627 if (name == NULL) { 628 gctl_error(req, "No 'arg%d' argument", i); 629 return; 630 } 631 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 632 name += strlen("/dev/"); 633 gp = g_nop_find_geom(mp, name); 634 if (gp == NULL) { 635 G_NOP_DEBUG(1, "Device %s is invalid.", name); 636 gctl_error(req, "Device %s is invalid.", name); 637 return; 638 } 639 error = g_nop_destroy(gp, *force); 640 if (error != 0) { 641 gctl_error(req, "Cannot destroy device %s (error=%d).", 642 gp->name, error); 643 return; 644 } 645 } 646 } 647 648 static void 649 g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp) 650 { 651 struct g_nop_softc *sc; 652 struct g_provider *pp; 653 const char *name; 654 char param[16]; 655 int i, *nargs; 656 657 g_topology_assert(); 658 659 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 660 if (nargs == NULL) { 661 gctl_error(req, "No '%s' argument", "nargs"); 662 return; 663 } 664 if (*nargs <= 0) { 665 gctl_error(req, "Missing device(s)."); 666 return; 667 } 668 669 for (i = 0; i < *nargs; i++) { 670 snprintf(param, sizeof(param), "arg%d", i); 671 name = gctl_get_asciiparam(req, param); 672 if (name == NULL) { 673 gctl_error(req, "No 'arg%d' argument", i); 674 return; 675 } 676 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 677 name += strlen("/dev/"); 678 pp = g_provider_by_name(name); 679 if (pp == NULL || pp->geom->class != mp) { 680 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 681 gctl_error(req, "Provider %s is invalid.", name); 682 return; 683 } 684 sc = pp->geom->softc; 685 sc->sc_reads = 0; 686 sc->sc_writes = 0; 687 sc->sc_deletes = 0; 688 sc->sc_getattrs = 0; 689 sc->sc_flushes = 0; 690 sc->sc_cmd0s = 0; 691 sc->sc_cmd1s = 0; 692 sc->sc_cmd2s = 0; 693 sc->sc_readbytes = 0; 694 sc->sc_wrotebytes = 0; 695 } 696 } 697 698 static void 699 g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb) 700 { 701 uint32_t *version; 702 703 g_topology_assert(); 704 705 version = gctl_get_paraml(req, "version", sizeof(*version)); 706 if (version == NULL) { 707 gctl_error(req, "No '%s' argument.", "version"); 708 return; 709 } 710 if (*version != G_NOP_VERSION) { 711 gctl_error(req, "Userland and kernel parts are out of sync."); 712 return; 713 } 714 715 if (strcmp(verb, "create") == 0) { 716 g_nop_ctl_create(req, mp); 717 return; 718 } else if (strcmp(verb, "configure") == 0) { 719 g_nop_ctl_configure(req, mp); 720 return; 721 } else if (strcmp(verb, "destroy") == 0) { 722 g_nop_ctl_destroy(req, mp); 723 return; 724 } else if (strcmp(verb, "reset") == 0) { 725 g_nop_ctl_reset(req, mp); 726 return; 727 } 728 729 gctl_error(req, "Unknown verb."); 730 } 731 732 static void 733 g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 734 struct g_consumer *cp, struct g_provider *pp) 735 { 736 struct g_nop_softc *sc; 737 738 if (pp != NULL || cp != NULL) 739 return; 740 sc = gp->softc; 741 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent, 742 (intmax_t)sc->sc_offset); 743 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent, 744 sc->sc_rfailprob); 745 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent, 746 sc->sc_wfailprob); 747 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error); 748 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads); 749 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes); 750 sbuf_printf(sb, "%s<Deletes>%ju</Deletes>\n", indent, sc->sc_deletes); 751 sbuf_printf(sb, "%s<Getattrs>%ju</Getattrs>\n", indent, sc->sc_getattrs); 752 sbuf_printf(sb, "%s<Flushes>%ju</Flushes>\n", indent, sc->sc_flushes); 753 sbuf_printf(sb, "%s<Cmd0s>%ju</Cmd0s>\n", indent, sc->sc_cmd0s); 754 sbuf_printf(sb, "%s<Cmd1s>%ju</Cmd1s>\n", indent, sc->sc_cmd1s); 755 sbuf_printf(sb, "%s<Cmd2s>%ju</Cmd2s>\n", indent, sc->sc_cmd2s); 756 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent, 757 sc->sc_readbytes); 758 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent, 759 sc->sc_wrotebytes); 760 } 761 762 DECLARE_GEOM_CLASS(g_nop_class, g_nop); 763 MODULE_VERSION(geom_nop, 0); 764