sys/geom/nop/g_nop.c

   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);