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 g_access_t g_nop_access; 58 static g_dumpconf_t g_nop_dumpconf; 59 static g_orphan_t g_nop_orphan; 60 static g_provgone_t g_nop_providergone; 61 static g_resize_t g_nop_resize; 62 static g_start_t g_nop_start; 63 64 struct g_class g_nop_class = { 65 .name = G_NOP_CLASS_NAME, 66 .version = G_VERSION, 67 .ctlreq = g_nop_config, 68 .destroy_geom = g_nop_destroy_geom, 69 .access = g_nop_access, 70 .dumpconf = g_nop_dumpconf, 71 .orphan = g_nop_orphan, 72 .providergone = g_nop_providergone, 73 .resize = g_nop_resize, 74 .start = g_nop_start, 75 }; 76 77 static void 78 g_nop_orphan(struct g_consumer *cp) 79 { 80 81 g_topology_assert(); 82 g_nop_destroy(cp->geom, 1); 83 } 84 85 static void 86 g_nop_resize(struct g_consumer *cp) 87 { 88 struct g_nop_softc *sc; 89 struct g_geom *gp; 90 struct g_provider *pp; 91 off_t size; 92 93 g_topology_assert(); 94 95 gp = cp->geom; 96 sc = gp->softc; 97 98 if (sc->sc_explicitsize != 0) 99 return; 100 if (cp->provider->mediasize < sc->sc_offset) { 101 g_nop_destroy(gp, 1); 102 return; 103 } 104 size = cp->provider->mediasize - sc->sc_offset; 105 LIST_FOREACH(pp, &gp->provider, provider) 106 g_resize_provider(pp, size); 107 } 108 109 static int 110 g_nop_dumper(void *priv, void *virtual, vm_offset_t physical, off_t offset, 111 size_t length) 112 { 113 return (0); 114 } 115 116 static void 117 g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc) 118 { 119 struct g_kerneldump *gkd; 120 struct g_geom *gp; 121 struct g_provider *pp; 122 123 gkd = (struct g_kerneldump *)bp->bio_data; 124 gp = bp->bio_to->geom; 125 g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name, 126 (intmax_t)gkd->offset, (intmax_t)gkd->length); 127 128 pp = LIST_FIRST(&gp->provider); 129 130 gkd->di.dumper = g_nop_dumper; 131 gkd->di.priv = sc; 132 gkd->di.blocksize = pp->sectorsize; 133 gkd->di.maxiosize = DFLTPHYS; 134 gkd->di.mediaoffset = sc->sc_offset + gkd->offset; 135 if (gkd->offset > sc->sc_explicitsize) { 136 g_io_deliver(bp, ENODEV); 137 return; 138 } 139 if (gkd->offset + gkd->length > sc->sc_explicitsize) 140 gkd->length = sc->sc_explicitsize - gkd->offset; 141 gkd->di.mediasize = gkd->length; 142 g_io_deliver(bp, 0); 143 } 144 145 static void 146 g_nop_start(struct bio *bp) 147 { 148 struct g_nop_softc *sc; 149 struct g_geom *gp; 150 struct g_provider *pp; 151 struct bio *cbp; 152 u_int failprob = 0; 153 154 gp = bp->bio_to->geom; 155 sc = gp->softc; 156 G_NOP_LOGREQ(bp, "Request received."); 157 mtx_lock(&sc->sc_lock); 158 switch (bp->bio_cmd) { 159 case BIO_READ: 160 sc->sc_reads++; 161 sc->sc_readbytes += bp->bio_length; 162 failprob = sc->sc_rfailprob; 163 break; 164 case BIO_WRITE: 165 sc->sc_writes++; 166 sc->sc_wrotebytes += bp->bio_length; 167 failprob = sc->sc_wfailprob; 168 break; 169 case BIO_DELETE: 170 sc->sc_deletes++; 171 break; 172 case BIO_GETATTR: 173 sc->sc_getattrs++; 174 if (sc->sc_physpath && 175 g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) 176 ; 177 else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0) 178 g_nop_kerneldump(bp, sc); 179 else 180 /* 181 * Fallthrough to forwarding the GETATTR down to the 182 * lower level device. 183 */ 184 break; 185 mtx_unlock(&sc->sc_lock); 186 return; 187 case BIO_FLUSH: 188 sc->sc_flushes++; 189 break; 190 case BIO_CMD0: 191 sc->sc_cmd0s++; 192 break; 193 case BIO_CMD1: 194 sc->sc_cmd1s++; 195 break; 196 case BIO_CMD2: 197 sc->sc_cmd2s++; 198 break; 199 } 200 mtx_unlock(&sc->sc_lock); 201 if (failprob > 0) { 202 u_int rval; 203 204 rval = arc4random() % 100; 205 if (rval < failprob) { 206 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error); 207 g_io_deliver(bp, sc->sc_error); 208 return; 209 } 210 } 211 cbp = g_clone_bio(bp); 212 if (cbp == NULL) { 213 g_io_deliver(bp, ENOMEM); 214 return; 215 } 216 cbp->bio_done = g_std_done; 217 cbp->bio_offset = bp->bio_offset + sc->sc_offset; 218 pp = LIST_FIRST(&gp->provider); 219 KASSERT(pp != NULL, ("NULL pp")); 220 cbp->bio_to = pp; 221 G_NOP_LOGREQ(cbp, "Sending request."); 222 g_io_request(cbp, LIST_FIRST(&gp->consumer)); 223 } 224 225 static int 226 g_nop_access(struct g_provider *pp, int dr, int dw, int de) 227 { 228 struct g_geom *gp; 229 struct g_consumer *cp; 230 int error; 231 232 gp = pp->geom; 233 cp = LIST_FIRST(&gp->consumer); 234 error = g_access(cp, dr, dw, de); 235 236 return (error); 237 } 238 239 static int 240 g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp, 241 int ioerror, u_int rfailprob, u_int wfailprob, off_t offset, off_t size, 242 u_int secsize, off_t stripesize, off_t stripeoffset, const char *physpath) 243 { 244 struct g_nop_softc *sc; 245 struct g_geom *gp; 246 struct g_provider *newpp; 247 struct g_consumer *cp; 248 char name[64]; 249 int error; 250 off_t explicitsize; 251 252 g_topology_assert(); 253 254 gp = NULL; 255 newpp = NULL; 256 cp = NULL; 257 258 if ((offset % pp->sectorsize) != 0) { 259 gctl_error(req, "Invalid offset for provider %s.", pp->name); 260 return (EINVAL); 261 } 262 if ((size % pp->sectorsize) != 0) { 263 gctl_error(req, "Invalid size for provider %s.", pp->name); 264 return (EINVAL); 265 } 266 if (offset >= pp->mediasize) { 267 gctl_error(req, "Invalid offset for provider %s.", pp->name); 268 return (EINVAL); 269 } 270 explicitsize = size; 271 if (size == 0) 272 size = pp->mediasize - offset; 273 if (offset + size > pp->mediasize) { 274 gctl_error(req, "Invalid size for provider %s.", pp->name); 275 return (EINVAL); 276 } 277 if (secsize == 0) 278 secsize = pp->sectorsize; 279 else if ((secsize % pp->sectorsize) != 0) { 280 gctl_error(req, "Invalid secsize for provider %s.", pp->name); 281 return (EINVAL); 282 } 283 if (secsize > MAXPHYS) { 284 gctl_error(req, "secsize is too big."); 285 return (EINVAL); 286 } 287 size -= size % secsize; 288 if ((stripesize % pp->sectorsize) != 0) { 289 gctl_error(req, "Invalid stripesize for provider %s.", pp->name); 290 return (EINVAL); 291 } 292 if ((stripeoffset % pp->sectorsize) != 0) { 293 gctl_error(req, "Invalid stripeoffset for provider %s.", pp->name); 294 return (EINVAL); 295 } 296 if (stripesize != 0 && stripeoffset >= stripesize) { 297 gctl_error(req, "stripeoffset is too big."); 298 return (EINVAL); 299 } 300 snprintf(name, sizeof(name), "%s%s", pp->name, G_NOP_SUFFIX); 301 LIST_FOREACH(gp, &mp->geom, geom) { 302 if (strcmp(gp->name, name) == 0) { 303 gctl_error(req, "Provider %s already exists.", name); 304 return (EEXIST); 305 } 306 } 307 gp = g_new_geomf(mp, "%s", name); 308 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 309 sc->sc_offset = offset; 310 sc->sc_explicitsize = explicitsize; 311 sc->sc_stripesize = stripesize; 312 sc->sc_stripeoffset = stripeoffset; 313 if (physpath && strcmp(physpath, G_NOP_PHYSPATH_PASSTHROUGH)) { 314 sc->sc_physpath = strndup(physpath, MAXPATHLEN, M_GEOM); 315 } else 316 sc->sc_physpath = NULL; 317 sc->sc_error = ioerror; 318 sc->sc_rfailprob = rfailprob; 319 sc->sc_wfailprob = wfailprob; 320 sc->sc_reads = 0; 321 sc->sc_writes = 0; 322 sc->sc_deletes = 0; 323 sc->sc_getattrs = 0; 324 sc->sc_flushes = 0; 325 sc->sc_cmd0s = 0; 326 sc->sc_cmd1s = 0; 327 sc->sc_cmd2s = 0; 328 sc->sc_readbytes = 0; 329 sc->sc_wrotebytes = 0; 330 mtx_init(&sc->sc_lock, "gnop lock", NULL, MTX_DEF); 331 gp->softc = sc; 332 333 newpp = g_new_providerf(gp, "%s", gp->name); 334 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE; 335 newpp->mediasize = size; 336 newpp->sectorsize = secsize; 337 newpp->stripesize = stripesize; 338 newpp->stripeoffset = stripeoffset; 339 340 cp = g_new_consumer(gp); 341 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 342 error = g_attach(cp, pp); 343 if (error != 0) { 344 gctl_error(req, "Cannot attach to provider %s.", pp->name); 345 goto fail; 346 } 347 348 newpp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 349 g_error_provider(newpp, 0); 350 G_NOP_DEBUG(0, "Device %s created.", gp->name); 351 return (0); 352 fail: 353 if (cp->provider != NULL) 354 g_detach(cp); 355 g_destroy_consumer(cp); 356 g_destroy_provider(newpp); 357 mtx_destroy(&sc->sc_lock); 358 free(sc->sc_physpath, M_GEOM); 359 g_free(gp->softc); 360 g_destroy_geom(gp); 361 return (error); 362 } 363 364 static void 365 g_nop_providergone(struct g_provider *pp) 366 { 367 struct g_geom *gp = pp->geom; 368 struct g_nop_softc *sc = gp->softc; 369 370 gp->softc = NULL; 371 free(sc->sc_physpath, M_GEOM); 372 mtx_destroy(&sc->sc_lock); 373 g_free(sc); 374 } 375 376 static int 377 g_nop_destroy(struct g_geom *gp, boolean_t force) 378 { 379 struct g_nop_softc *sc; 380 struct g_provider *pp; 381 382 g_topology_assert(); 383 sc = gp->softc; 384 if (sc == NULL) 385 return (ENXIO); 386 pp = LIST_FIRST(&gp->provider); 387 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 388 if (force) { 389 G_NOP_DEBUG(0, "Device %s is still open, so it " 390 "can't be definitely removed.", pp->name); 391 } else { 392 G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).", 393 pp->name, pp->acr, pp->acw, pp->ace); 394 return (EBUSY); 395 } 396 } else { 397 G_NOP_DEBUG(0, "Device %s removed.", gp->name); 398 } 399 g_wither_geom(gp, ENXIO); 400 401 return (0); 402 } 403 404 static int 405 g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 406 { 407 408 return (g_nop_destroy(gp, 0)); 409 } 410 411 static void 412 g_nop_ctl_create(struct gctl_req *req, struct g_class *mp) 413 { 414 struct g_provider *pp; 415 intmax_t *error, *rfailprob, *wfailprob, *offset, *secsize, *size, 416 *stripesize, *stripeoffset; 417 const char *name, *physpath; 418 char param[16]; 419 int i, *nargs; 420 421 g_topology_assert(); 422 423 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 424 if (nargs == NULL) { 425 gctl_error(req, "No '%s' argument", "nargs"); 426 return; 427 } 428 if (*nargs <= 0) { 429 gctl_error(req, "Missing device(s)."); 430 return; 431 } 432 error = gctl_get_paraml(req, "error", sizeof(*error)); 433 if (error == NULL) { 434 gctl_error(req, "No '%s' argument", "error"); 435 return; 436 } 437 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 438 if (rfailprob == NULL) { 439 gctl_error(req, "No '%s' argument", "rfailprob"); 440 return; 441 } 442 if (*rfailprob < -1 || *rfailprob > 100) { 443 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 444 return; 445 } 446 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 447 if (wfailprob == NULL) { 448 gctl_error(req, "No '%s' argument", "wfailprob"); 449 return; 450 } 451 if (*wfailprob < -1 || *wfailprob > 100) { 452 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 453 return; 454 } 455 offset = gctl_get_paraml(req, "offset", sizeof(*offset)); 456 if (offset == NULL) { 457 gctl_error(req, "No '%s' argument", "offset"); 458 return; 459 } 460 if (*offset < 0) { 461 gctl_error(req, "Invalid '%s' argument", "offset"); 462 return; 463 } 464 size = gctl_get_paraml(req, "size", sizeof(*size)); 465 if (size == NULL) { 466 gctl_error(req, "No '%s' argument", "size"); 467 return; 468 } 469 if (*size < 0) { 470 gctl_error(req, "Invalid '%s' argument", "size"); 471 return; 472 } 473 secsize = gctl_get_paraml(req, "secsize", sizeof(*secsize)); 474 if (secsize == NULL) { 475 gctl_error(req, "No '%s' argument", "secsize"); 476 return; 477 } 478 if (*secsize < 0) { 479 gctl_error(req, "Invalid '%s' argument", "secsize"); 480 return; 481 } 482 stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize)); 483 if (stripesize == NULL) { 484 gctl_error(req, "No '%s' argument", "stripesize"); 485 return; 486 } 487 if (*stripesize < 0) { 488 gctl_error(req, "Invalid '%s' argument", "stripesize"); 489 return; 490 } 491 stripeoffset = gctl_get_paraml(req, "stripeoffset", sizeof(*stripeoffset)); 492 if (stripeoffset == NULL) { 493 gctl_error(req, "No '%s' argument", "stripeoffset"); 494 return; 495 } 496 if (*stripeoffset < 0) { 497 gctl_error(req, "Invalid '%s' argument", "stripeoffset"); 498 return; 499 } 500 physpath = gctl_get_asciiparam(req, "physpath"); 501 502 for (i = 0; i < *nargs; i++) { 503 snprintf(param, sizeof(param), "arg%d", i); 504 name = gctl_get_asciiparam(req, param); 505 if (name == NULL) { 506 gctl_error(req, "No 'arg%d' argument", i); 507 return; 508 } 509 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 510 name += strlen("/dev/"); 511 pp = g_provider_by_name(name); 512 if (pp == NULL) { 513 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 514 gctl_error(req, "Provider %s is invalid.", name); 515 return; 516 } 517 if (g_nop_create(req, mp, pp, 518 *error == -1 ? EIO : (int)*error, 519 *rfailprob == -1 ? 0 : (u_int)*rfailprob, 520 *wfailprob == -1 ? 0 : (u_int)*wfailprob, 521 (off_t)*offset, (off_t)*size, (u_int)*secsize, 522 (off_t)*stripesize, (off_t)*stripeoffset, 523 physpath) != 0) { 524 return; 525 } 526 } 527 } 528 529 static void 530 g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp) 531 { 532 struct g_nop_softc *sc; 533 struct g_provider *pp; 534 intmax_t *error, *rfailprob, *wfailprob; 535 const char *name; 536 char param[16]; 537 int i, *nargs; 538 539 g_topology_assert(); 540 541 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 542 if (nargs == NULL) { 543 gctl_error(req, "No '%s' argument", "nargs"); 544 return; 545 } 546 if (*nargs <= 0) { 547 gctl_error(req, "Missing device(s)."); 548 return; 549 } 550 error = gctl_get_paraml(req, "error", sizeof(*error)); 551 if (error == NULL) { 552 gctl_error(req, "No '%s' argument", "error"); 553 return; 554 } 555 rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob)); 556 if (rfailprob == NULL) { 557 gctl_error(req, "No '%s' argument", "rfailprob"); 558 return; 559 } 560 if (*rfailprob < -1 || *rfailprob > 100) { 561 gctl_error(req, "Invalid '%s' argument", "rfailprob"); 562 return; 563 } 564 wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob)); 565 if (wfailprob == NULL) { 566 gctl_error(req, "No '%s' argument", "wfailprob"); 567 return; 568 } 569 if (*wfailprob < -1 || *wfailprob > 100) { 570 gctl_error(req, "Invalid '%s' argument", "wfailprob"); 571 return; 572 } 573 574 for (i = 0; i < *nargs; i++) { 575 snprintf(param, sizeof(param), "arg%d", i); 576 name = gctl_get_asciiparam(req, param); 577 if (name == NULL) { 578 gctl_error(req, "No 'arg%d' argument", i); 579 return; 580 } 581 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 582 name += strlen("/dev/"); 583 pp = g_provider_by_name(name); 584 if (pp == NULL || pp->geom->class != mp) { 585 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 586 gctl_error(req, "Provider %s is invalid.", name); 587 return; 588 } 589 sc = pp->geom->softc; 590 if (*error != -1) 591 sc->sc_error = (int)*error; 592 if (*rfailprob != -1) 593 sc->sc_rfailprob = (u_int)*rfailprob; 594 if (*wfailprob != -1) 595 sc->sc_wfailprob = (u_int)*wfailprob; 596 } 597 } 598 599 static struct g_geom * 600 g_nop_find_geom(struct g_class *mp, const char *name) 601 { 602 struct g_geom *gp; 603 604 LIST_FOREACH(gp, &mp->geom, geom) { 605 if (strcmp(gp->name, name) == 0) 606 return (gp); 607 } 608 return (NULL); 609 } 610 611 static void 612 g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp) 613 { 614 int *nargs, *force, error, i; 615 struct g_geom *gp; 616 const char *name; 617 char param[16]; 618 619 g_topology_assert(); 620 621 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 622 if (nargs == NULL) { 623 gctl_error(req, "No '%s' argument", "nargs"); 624 return; 625 } 626 if (*nargs <= 0) { 627 gctl_error(req, "Missing device(s)."); 628 return; 629 } 630 force = gctl_get_paraml(req, "force", sizeof(*force)); 631 if (force == NULL) { 632 gctl_error(req, "No 'force' argument"); 633 return; 634 } 635 636 for (i = 0; i < *nargs; i++) { 637 snprintf(param, sizeof(param), "arg%d", i); 638 name = gctl_get_asciiparam(req, param); 639 if (name == NULL) { 640 gctl_error(req, "No 'arg%d' argument", i); 641 return; 642 } 643 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 644 name += strlen("/dev/"); 645 gp = g_nop_find_geom(mp, name); 646 if (gp == NULL) { 647 G_NOP_DEBUG(1, "Device %s is invalid.", name); 648 gctl_error(req, "Device %s is invalid.", name); 649 return; 650 } 651 error = g_nop_destroy(gp, *force); 652 if (error != 0) { 653 gctl_error(req, "Cannot destroy device %s (error=%d).", 654 gp->name, error); 655 return; 656 } 657 } 658 } 659 660 static void 661 g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp) 662 { 663 struct g_nop_softc *sc; 664 struct g_provider *pp; 665 const char *name; 666 char param[16]; 667 int i, *nargs; 668 669 g_topology_assert(); 670 671 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 672 if (nargs == NULL) { 673 gctl_error(req, "No '%s' argument", "nargs"); 674 return; 675 } 676 if (*nargs <= 0) { 677 gctl_error(req, "Missing device(s)."); 678 return; 679 } 680 681 for (i = 0; i < *nargs; i++) { 682 snprintf(param, sizeof(param), "arg%d", i); 683 name = gctl_get_asciiparam(req, param); 684 if (name == NULL) { 685 gctl_error(req, "No 'arg%d' argument", i); 686 return; 687 } 688 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 689 name += strlen("/dev/"); 690 pp = g_provider_by_name(name); 691 if (pp == NULL || pp->geom->class != mp) { 692 G_NOP_DEBUG(1, "Provider %s is invalid.", name); 693 gctl_error(req, "Provider %s is invalid.", name); 694 return; 695 } 696 sc = pp->geom->softc; 697 sc->sc_reads = 0; 698 sc->sc_writes = 0; 699 sc->sc_deletes = 0; 700 sc->sc_getattrs = 0; 701 sc->sc_flushes = 0; 702 sc->sc_cmd0s = 0; 703 sc->sc_cmd1s = 0; 704 sc->sc_cmd2s = 0; 705 sc->sc_readbytes = 0; 706 sc->sc_wrotebytes = 0; 707 } 708 } 709 710 static void 711 g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb) 712 { 713 uint32_t *version; 714 715 g_topology_assert(); 716 717 version = gctl_get_paraml(req, "version", sizeof(*version)); 718 if (version == NULL) { 719 gctl_error(req, "No '%s' argument.", "version"); 720 return; 721 } 722 if (*version != G_NOP_VERSION) { 723 gctl_error(req, "Userland and kernel parts are out of sync."); 724 return; 725 } 726 727 if (strcmp(verb, "create") == 0) { 728 g_nop_ctl_create(req, mp); 729 return; 730 } else if (strcmp(verb, "configure") == 0) { 731 g_nop_ctl_configure(req, mp); 732 return; 733 } else if (strcmp(verb, "destroy") == 0) { 734 g_nop_ctl_destroy(req, mp); 735 return; 736 } else if (strcmp(verb, "reset") == 0) { 737 g_nop_ctl_reset(req, mp); 738 return; 739 } 740 741 gctl_error(req, "Unknown verb."); 742 } 743 744 static void 745 g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 746 struct g_consumer *cp, struct g_provider *pp) 747 { 748 struct g_nop_softc *sc; 749 750 if (pp != NULL || cp != NULL) 751 return; 752 sc = gp->softc; 753 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent, 754 (intmax_t)sc->sc_offset); 755 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent, 756 sc->sc_rfailprob); 757 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent, 758 sc->sc_wfailprob); 759 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error); 760 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads); 761 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes); 762 sbuf_printf(sb, "%s<Deletes>%ju</Deletes>\n", indent, sc->sc_deletes); 763 sbuf_printf(sb, "%s<Getattrs>%ju</Getattrs>\n", indent, sc->sc_getattrs); 764 sbuf_printf(sb, "%s<Flushes>%ju</Flushes>\n", indent, sc->sc_flushes); 765 sbuf_printf(sb, "%s<Cmd0s>%ju</Cmd0s>\n", indent, sc->sc_cmd0s); 766 sbuf_printf(sb, "%s<Cmd1s>%ju</Cmd1s>\n", indent, sc->sc_cmd1s); 767 sbuf_printf(sb, "%s<Cmd2s>%ju</Cmd2s>\n", indent, sc->sc_cmd2s); 768 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent, 769 sc->sc_readbytes); 770 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent, 771 sc->sc_wrotebytes); 772 } 773 774 DECLARE_GEOM_CLASS(g_nop_class, g_nop); 775 MODULE_VERSION(geom_nop, 0); 776