1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <[email protected]>
5 * Copyright (c) 2019 Mariusz Zaborski <[email protected]>
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 #include <sys/param.h>
32 #include <sys/ctype.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 SYSCTL_DECL(_kern_geom);
47 static SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
48 "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 bool
g_nop_verify_nprefix(const char * name)85 g_nop_verify_nprefix(const char *name)
86 {
87 int i;
88
89 for (i = 0; i < strlen(name); i++) {
90 if (isalpha(name[i]) == 0 && isdigit(name[i]) == 0) {
91 return (false);
92 }
93 }
94
95 return (true);
96 }
97
98 static void
g_nop_orphan(struct g_consumer * cp)99 g_nop_orphan(struct g_consumer *cp)
100 {
101
102 g_topology_assert();
103 g_nop_destroy(cp->geom, 1);
104 }
105
106 static void
g_nop_resize(struct g_consumer * cp)107 g_nop_resize(struct g_consumer *cp)
108 {
109 struct g_nop_softc *sc;
110 struct g_geom *gp;
111 struct g_provider *pp;
112 off_t size;
113
114 g_topology_assert();
115
116 gp = cp->geom;
117 sc = gp->softc;
118
119 if (sc->sc_explicitsize != 0)
120 return;
121 if (cp->provider->mediasize < sc->sc_offset) {
122 g_nop_destroy(gp, 1);
123 return;
124 }
125 size = cp->provider->mediasize - sc->sc_offset;
126 LIST_FOREACH(pp, &gp->provider, provider)
127 g_resize_provider(pp, size);
128 }
129
130 static int
g_nop_dumper(void * priv,void * virtual,off_t offset,size_t length)131 g_nop_dumper(void *priv, void *virtual, off_t offset, size_t length)
132 {
133
134 return (0);
135 }
136
137 static void
g_nop_kerneldump(struct bio * bp,struct g_nop_softc * sc)138 g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc)
139 {
140 struct g_kerneldump *gkd;
141 struct g_geom *gp;
142 struct g_provider *pp;
143
144 gkd = (struct g_kerneldump *)bp->bio_data;
145 gp = bp->bio_to->geom;
146 g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name,
147 (intmax_t)gkd->offset, (intmax_t)gkd->length);
148
149 pp = LIST_FIRST(&gp->provider);
150
151 gkd->di.dumper = g_nop_dumper;
152 gkd->di.priv = sc;
153 gkd->di.blocksize = pp->sectorsize;
154 gkd->di.maxiosize = DFLTPHYS;
155 gkd->di.mediaoffset = sc->sc_offset + gkd->offset;
156 if (gkd->offset > sc->sc_explicitsize) {
157 g_io_deliver(bp, ENODEV);
158 return;
159 }
160 if (gkd->offset + gkd->length > sc->sc_explicitsize)
161 gkd->length = sc->sc_explicitsize - gkd->offset;
162 gkd->di.mediasize = gkd->length;
163 g_io_deliver(bp, 0);
164 }
165
166 static void
g_nop_pass(struct bio * cbp,struct g_geom * gp)167 g_nop_pass(struct bio *cbp, struct g_geom *gp)
168 {
169
170 G_NOP_LOGREQ(cbp, "Sending request.");
171 g_io_request(cbp, LIST_FIRST(&gp->consumer));
172 }
173
174 static void
g_nop_pass_timeout(void * data)175 g_nop_pass_timeout(void *data)
176 {
177 struct g_nop_softc *sc;
178 struct g_geom *gp;
179 struct g_nop_delay *gndelay;
180
181 gndelay = (struct g_nop_delay *)data;
182
183 gp = gndelay->dl_bio->bio_to->geom;
184 sc = gp->softc;
185
186 mtx_lock(&sc->sc_lock);
187 TAILQ_REMOVE(&sc->sc_head_delay, gndelay, dl_next);
188 mtx_unlock(&sc->sc_lock);
189
190 g_nop_pass(gndelay->dl_bio, gp);
191
192 g_free(data);
193 }
194
195 static void
g_nop_start(struct bio * bp)196 g_nop_start(struct bio *bp)
197 {
198 struct g_nop_softc *sc;
199 struct g_geom *gp;
200 struct g_provider *pp;
201 struct bio *cbp;
202 u_int failprob, delayprob, delaytime;
203
204 failprob = delayprob = delaytime = 0;
205
206 gp = bp->bio_to->geom;
207 sc = gp->softc;
208
209 G_NOP_LOGREQ(bp, "Request received.");
210 mtx_lock(&sc->sc_lock);
211 switch (bp->bio_cmd) {
212 case BIO_READ:
213 sc->sc_reads++;
214 sc->sc_readbytes += bp->bio_length;
215 if (sc->sc_count_until_fail != 0) {
216 sc->sc_count_until_fail -= 1;
217 } else {
218 failprob = sc->sc_rfailprob;
219 delayprob = sc->sc_rdelayprob;
220 delaytime = sc->sc_delaymsec;
221 }
222 break;
223 case BIO_WRITE:
224 sc->sc_writes++;
225 sc->sc_wrotebytes += bp->bio_length;
226 if (sc->sc_count_until_fail != 0) {
227 sc->sc_count_until_fail -= 1;
228 } else {
229 failprob = sc->sc_wfailprob;
230 delayprob = sc->sc_wdelayprob;
231 delaytime = sc->sc_delaymsec;
232 }
233 break;
234 case BIO_DELETE:
235 sc->sc_deletes++;
236 break;
237 case BIO_GETATTR:
238 sc->sc_getattrs++;
239 if (sc->sc_physpath &&
240 g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath))
241 ;
242 else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0)
243 g_nop_kerneldump(bp, sc);
244 else
245 /*
246 * Fallthrough to forwarding the GETATTR down to the
247 * lower level device.
248 */
249 break;
250 mtx_unlock(&sc->sc_lock);
251 return;
252 case BIO_FLUSH:
253 sc->sc_flushes++;
254 break;
255 case BIO_SPEEDUP:
256 sc->sc_speedups++;
257 break;
258 case BIO_CMD0:
259 sc->sc_cmd0s++;
260 break;
261 case BIO_CMD1:
262 sc->sc_cmd1s++;
263 break;
264 case BIO_CMD2:
265 sc->sc_cmd2s++;
266 break;
267 }
268 mtx_unlock(&sc->sc_lock);
269
270 if (failprob > 0) {
271 u_int rval;
272
273 rval = arc4random() % 100;
274 if (rval < failprob) {
275 G_NOP_LOGREQLVL(1, bp, "Returning error=%d.", sc->sc_error);
276 g_io_deliver(bp, sc->sc_error);
277 return;
278 }
279 }
280
281 cbp = g_clone_bio(bp);
282 if (cbp == NULL) {
283 g_io_deliver(bp, ENOMEM);
284 return;
285 }
286 cbp->bio_done = g_std_done;
287 cbp->bio_offset = bp->bio_offset + sc->sc_offset;
288 pp = LIST_FIRST(&gp->provider);
289 KASSERT(pp != NULL, ("NULL pp"));
290 cbp->bio_to = pp;
291
292 if (delayprob > 0) {
293 struct g_nop_delay *gndelay;
294 u_int rval;
295
296 rval = arc4random() % 100;
297 if (rval < delayprob) {
298 gndelay = g_malloc(sizeof(*gndelay), M_NOWAIT | M_ZERO);
299 if (gndelay != NULL) {
300 callout_init(&gndelay->dl_cal, 1);
301
302 gndelay->dl_bio = cbp;
303
304 mtx_lock(&sc->sc_lock);
305 TAILQ_INSERT_TAIL(&sc->sc_head_delay, gndelay,
306 dl_next);
307 mtx_unlock(&sc->sc_lock);
308
309 callout_reset(&gndelay->dl_cal,
310 MSEC_2_TICKS(delaytime), g_nop_pass_timeout,
311 gndelay);
312 return;
313 }
314 }
315 }
316
317 g_nop_pass(cbp, gp);
318 }
319
320 static int
g_nop_access(struct g_provider * pp,int dr,int dw,int de)321 g_nop_access(struct g_provider *pp, int dr, int dw, int de)
322 {
323 struct g_geom *gp;
324 struct g_consumer *cp;
325 int error;
326
327 gp = pp->geom;
328 cp = LIST_FIRST(&gp->consumer);
329 error = g_access(cp, dr, dw, de);
330
331 return (error);
332 }
333
334 static int
g_nop_create(struct gctl_req * req,struct g_class * mp,struct g_provider * pp,const char * gnopname,int ioerror,u_int count_until_fail,u_int rfailprob,u_int wfailprob,u_int delaymsec,u_int rdelayprob,u_int wdelayprob,off_t offset,off_t size,u_int secsize,off_t stripesize,off_t stripeoffset,const char * physpath)335 g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
336 const char *gnopname, int ioerror, u_int count_until_fail,
337 u_int rfailprob, u_int wfailprob, u_int delaymsec, u_int rdelayprob,
338 u_int wdelayprob, off_t offset, off_t size, u_int secsize, off_t stripesize,
339 off_t stripeoffset, const char *physpath)
340 {
341 struct g_nop_softc *sc;
342 struct g_geom *gp;
343 struct g_provider *newpp;
344 struct g_consumer *cp;
345 struct g_geom_alias *gap;
346 char name[64];
347 int error, n;
348 off_t explicitsize;
349
350 g_topology_assert();
351
352 gp = NULL;
353 newpp = NULL;
354 cp = NULL;
355
356 if ((offset % pp->sectorsize) != 0) {
357 gctl_error(req, "Invalid offset for provider %s.", pp->name);
358 return (EINVAL);
359 }
360 if ((size % pp->sectorsize) != 0) {
361 gctl_error(req, "Invalid size for provider %s.", pp->name);
362 return (EINVAL);
363 }
364 if (offset >= pp->mediasize) {
365 gctl_error(req, "Invalid offset for provider %s.", pp->name);
366 return (EINVAL);
367 }
368 explicitsize = size;
369 if (size == 0)
370 size = pp->mediasize - offset;
371 if (offset + size > pp->mediasize) {
372 gctl_error(req, "Invalid size for provider %s.", pp->name);
373 return (EINVAL);
374 }
375 if (secsize == 0)
376 secsize = pp->sectorsize;
377 else if ((secsize % pp->sectorsize) != 0) {
378 gctl_error(req, "Invalid secsize for provider %s.", pp->name);
379 return (EINVAL);
380 }
381 if (secsize > maxphys) {
382 gctl_error(req, "secsize is too big.");
383 return (EINVAL);
384 }
385 size -= size % secsize;
386 if ((stripesize % pp->sectorsize) != 0) {
387 gctl_error(req, "Invalid stripesize for provider %s.", pp->name);
388 return (EINVAL);
389 }
390 if ((stripeoffset % pp->sectorsize) != 0) {
391 gctl_error(req, "Invalid stripeoffset for provider %s.", pp->name);
392 return (EINVAL);
393 }
394 if (stripesize != 0 && stripeoffset >= stripesize) {
395 gctl_error(req, "stripeoffset is too big.");
396 return (EINVAL);
397 }
398 if (gnopname != NULL && !g_nop_verify_nprefix(gnopname)) {
399 gctl_error(req, "Name %s is invalid.", gnopname);
400 return (EINVAL);
401 }
402
403 if (gnopname != NULL) {
404 n = snprintf(name, sizeof(name), "%s%s", gnopname,
405 G_NOP_SUFFIX);
406 } else {
407 n = snprintf(name, sizeof(name), "%s%s", pp->name,
408 G_NOP_SUFFIX);
409 }
410 if (n <= 0 || n >= sizeof(name)) {
411 gctl_error(req, "Invalid provider name.");
412 return (EINVAL);
413 }
414 LIST_FOREACH(gp, &mp->geom, geom) {
415 if (strcmp(gp->name, name) == 0) {
416 gctl_error(req, "Provider %s already exists.", name);
417 return (EEXIST);
418 }
419 }
420 gp = g_new_geomf(mp, "%s", name);
421 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
422 sc->sc_offset = offset;
423 sc->sc_explicitsize = explicitsize;
424 sc->sc_stripesize = stripesize;
425 sc->sc_stripeoffset = stripeoffset;
426 if (physpath && strcmp(physpath, G_NOP_PHYSPATH_PASSTHROUGH)) {
427 sc->sc_physpath = strndup(physpath, MAXPATHLEN, M_GEOM);
428 } else
429 sc->sc_physpath = NULL;
430 sc->sc_error = ioerror;
431 sc->sc_count_until_fail = count_until_fail;
432 sc->sc_rfailprob = rfailprob;
433 sc->sc_wfailprob = wfailprob;
434 sc->sc_delaymsec = delaymsec;
435 sc->sc_rdelayprob = rdelayprob;
436 sc->sc_wdelayprob = wdelayprob;
437 sc->sc_reads = 0;
438 sc->sc_writes = 0;
439 sc->sc_deletes = 0;
440 sc->sc_getattrs = 0;
441 sc->sc_flushes = 0;
442 sc->sc_speedups = 0;
443 sc->sc_cmd0s = 0;
444 sc->sc_cmd1s = 0;
445 sc->sc_cmd2s = 0;
446 sc->sc_readbytes = 0;
447 sc->sc_wrotebytes = 0;
448 TAILQ_INIT(&sc->sc_head_delay);
449 mtx_init(&sc->sc_lock, "gnop lock", NULL, MTX_DEF);
450 gp->softc = sc;
451
452 newpp = g_new_providerf(gp, "%s", gp->name);
453 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;
454 newpp->mediasize = size;
455 newpp->sectorsize = secsize;
456 newpp->stripesize = stripesize;
457 newpp->stripeoffset = stripeoffset;
458 LIST_FOREACH(gap, &pp->aliases, ga_next)
459 g_provider_add_alias(newpp, "%s%s", gap->ga_alias, G_NOP_SUFFIX);
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
g_nop_providergone(struct g_provider * pp)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
g_nop_destroy(struct g_geom * gp,boolean_t force)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
g_nop_destroy_geom(struct gctl_req * req,struct g_class * mp,struct g_geom * gp)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
g_nop_ctl_create(struct gctl_req * req,struct g_class * mp)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 *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 pp = gctl_get_provider(req, param);
671 if (pp == NULL)
672 return;
673 if (g_nop_create(req, mp, pp,
674 gnopname,
675 error == -1 ? EIO : (int)error,
676 count_until_fail == -1 ? 0 : (u_int)count_until_fail,
677 rfailprob == -1 ? 0 : (u_int)rfailprob,
678 wfailprob == -1 ? 0 : (u_int)wfailprob,
679 delaymsec == -1 ? 1 : (u_int)delaymsec,
680 rdelayprob == -1 ? 0 : (u_int)rdelayprob,
681 wdelayprob == -1 ? 0 : (u_int)wdelayprob,
682 (off_t)offset, (off_t)size, (u_int)secsize,
683 (off_t)stripesize, (off_t)stripeoffset,
684 physpath) != 0) {
685 return;
686 }
687 }
688 }
689
690 static void
g_nop_ctl_configure(struct gctl_req * req,struct g_class * mp)691 g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp)
692 {
693 struct g_nop_softc *sc;
694 struct g_provider *pp;
695 intmax_t *val, delaymsec, error, rdelayprob, rfailprob, wdelayprob,
696 wfailprob, count_until_fail;
697 char param[16];
698 int i, *nargs;
699
700 g_topology_assert();
701
702 count_until_fail = -1;
703 delaymsec = -1;
704 error = -1;
705 rdelayprob = -1;
706 rfailprob = -1;
707 wdelayprob = -1;
708 wfailprob = -1;
709
710 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
711 if (nargs == NULL) {
712 gctl_error(req, "No '%s' argument", "nargs");
713 return;
714 }
715 if (*nargs <= 0) {
716 gctl_error(req, "Missing device(s).");
717 return;
718 }
719 val = gctl_get_paraml_opt(req, "error", sizeof(*val));
720 if (val != NULL) {
721 error = *val;
722 }
723 val = gctl_get_paraml_opt(req, "count_until_fail", sizeof(*val));
724 if (val != NULL) {
725 count_until_fail = *val;
726 }
727 val = gctl_get_paraml_opt(req, "rfailprob", sizeof(*val));
728 if (val != NULL) {
729 rfailprob = *val;
730 if (rfailprob < -1 || rfailprob > 100) {
731 gctl_error(req, "Invalid '%s' argument", "rfailprob");
732 return;
733 }
734 }
735 val = gctl_get_paraml_opt(req, "wfailprob", sizeof(*val));
736 if (val != NULL) {
737 wfailprob = *val;
738 if (wfailprob < -1 || wfailprob > 100) {
739 gctl_error(req, "Invalid '%s' argument", "wfailprob");
740 return;
741 }
742 }
743 val = gctl_get_paraml_opt(req, "delaymsec", sizeof(*val));
744 if (val != NULL) {
745 delaymsec = *val;
746 if (delaymsec < 1 && delaymsec != -1) {
747 gctl_error(req, "Invalid '%s' argument", "delaymsec");
748 return;
749 }
750 }
751 val = gctl_get_paraml_opt(req, "rdelayprob", sizeof(*val));
752 if (val != NULL) {
753 rdelayprob = *val;
754 if (rdelayprob < -1 || rdelayprob > 100) {
755 gctl_error(req, "Invalid '%s' argument", "rdelayprob");
756 return;
757 }
758 }
759 val = gctl_get_paraml_opt(req, "wdelayprob", sizeof(*val));
760 if (val != NULL) {
761 wdelayprob = *val;
762 if (wdelayprob < -1 || wdelayprob > 100) {
763 gctl_error(req, "Invalid '%s' argument", "wdelayprob");
764 return;
765 }
766 }
767
768 for (i = 0; i < *nargs; i++) {
769 snprintf(param, sizeof(param), "arg%d", i);
770 pp = gctl_get_provider(req, param);
771 if (pp == NULL)
772 return;
773 if (pp->geom->class != mp) {
774 G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name);
775 gctl_error(req, "Provider %s is invalid.", pp->name);
776 return;
777 }
778 sc = pp->geom->softc;
779 if (error != -1)
780 sc->sc_error = (int)error;
781 if (rfailprob != -1)
782 sc->sc_rfailprob = (u_int)rfailprob;
783 if (wfailprob != -1)
784 sc->sc_wfailprob = (u_int)wfailprob;
785 if (rdelayprob != -1)
786 sc->sc_rdelayprob = (u_int)rdelayprob;
787 if (wdelayprob != -1)
788 sc->sc_wdelayprob = (u_int)wdelayprob;
789 if (delaymsec != -1)
790 sc->sc_delaymsec = (u_int)delaymsec;
791 if (count_until_fail != -1)
792 sc->sc_count_until_fail = (u_int)count_until_fail;
793 }
794 }
795
796 static struct g_geom *
g_nop_find_geom(struct g_class * mp,const char * name)797 g_nop_find_geom(struct g_class *mp, const char *name)
798 {
799 struct g_geom *gp;
800
801 LIST_FOREACH(gp, &mp->geom, geom) {
802 if (strcmp(gp->name, name) == 0)
803 return (gp);
804 }
805 return (NULL);
806 }
807
808 static void
g_nop_ctl_destroy(struct gctl_req * req,struct g_class * mp)809 g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp)
810 {
811 int *nargs, *force, error, i;
812 struct g_geom *gp;
813 const char *name;
814 char param[16];
815
816 g_topology_assert();
817
818 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
819 if (nargs == NULL) {
820 gctl_error(req, "No '%s' argument", "nargs");
821 return;
822 }
823 if (*nargs <= 0) {
824 gctl_error(req, "Missing device(s).");
825 return;
826 }
827 force = gctl_get_paraml(req, "force", sizeof(*force));
828 if (force == NULL) {
829 gctl_error(req, "No 'force' argument");
830 return;
831 }
832
833 for (i = 0; i < *nargs; i++) {
834 snprintf(param, sizeof(param), "arg%d", i);
835 name = gctl_get_asciiparam(req, param);
836 if (name == NULL) {
837 gctl_error(req, "No 'arg%d' argument", i);
838 return;
839 }
840 if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
841 name += strlen(_PATH_DEV);
842 gp = g_nop_find_geom(mp, name);
843 if (gp == NULL) {
844 G_NOP_DEBUG(1, "Device %s is invalid.", name);
845 gctl_error(req, "Device %s is invalid.", name);
846 return;
847 }
848 error = g_nop_destroy(gp, *force);
849 if (error != 0) {
850 gctl_error(req, "Cannot destroy device %s (error=%d).",
851 gp->name, error);
852 return;
853 }
854 }
855 }
856
857 static void
g_nop_ctl_reset(struct gctl_req * req,struct g_class * mp)858 g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp)
859 {
860 struct g_nop_softc *sc;
861 struct g_provider *pp;
862 char param[16];
863 int i, *nargs;
864
865 g_topology_assert();
866
867 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
868 if (nargs == NULL) {
869 gctl_error(req, "No '%s' argument", "nargs");
870 return;
871 }
872 if (*nargs <= 0) {
873 gctl_error(req, "Missing device(s).");
874 return;
875 }
876
877 for (i = 0; i < *nargs; i++) {
878 snprintf(param, sizeof(param), "arg%d", i);
879 pp = gctl_get_provider(req, param);
880 if (pp == NULL)
881 return;
882 if (pp->geom->class != mp) {
883 G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name);
884 gctl_error(req, "Provider %s is invalid.", pp->name);
885 return;
886 }
887 sc = pp->geom->softc;
888 sc->sc_reads = 0;
889 sc->sc_writes = 0;
890 sc->sc_deletes = 0;
891 sc->sc_getattrs = 0;
892 sc->sc_flushes = 0;
893 sc->sc_speedups = 0;
894 sc->sc_cmd0s = 0;
895 sc->sc_cmd1s = 0;
896 sc->sc_cmd2s = 0;
897 sc->sc_readbytes = 0;
898 sc->sc_wrotebytes = 0;
899 }
900 }
901
902 static void
g_nop_config(struct gctl_req * req,struct g_class * mp,const char * verb)903 g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb)
904 {
905 uint32_t *version;
906
907 g_topology_assert();
908
909 version = gctl_get_paraml(req, "version", sizeof(*version));
910 if (version == NULL) {
911 gctl_error(req, "No '%s' argument.", "version");
912 return;
913 }
914 if (*version != G_NOP_VERSION) {
915 gctl_error(req, "Userland and kernel parts are out of sync.");
916 return;
917 }
918
919 if (strcmp(verb, "create") == 0) {
920 g_nop_ctl_create(req, mp);
921 return;
922 } else if (strcmp(verb, "configure") == 0) {
923 g_nop_ctl_configure(req, mp);
924 return;
925 } else if (strcmp(verb, "destroy") == 0) {
926 g_nop_ctl_destroy(req, mp);
927 return;
928 } else if (strcmp(verb, "reset") == 0) {
929 g_nop_ctl_reset(req, mp);
930 return;
931 }
932
933 gctl_error(req, "Unknown verb.");
934 }
935
936 static void
g_nop_dumpconf(struct sbuf * sb,const char * indent,struct g_geom * gp,struct g_consumer * cp,struct g_provider * pp)937 g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
938 struct g_consumer *cp, struct g_provider *pp)
939 {
940 struct g_nop_softc *sc;
941
942 if (pp != NULL || cp != NULL)
943 return;
944 sc = gp->softc;
945 sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent,
946 (intmax_t)sc->sc_offset);
947 sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent,
948 sc->sc_rfailprob);
949 sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent,
950 sc->sc_wfailprob);
951 sbuf_printf(sb, "%s<ReadDelayedProb>%u</ReadDelayedProb>\n", indent,
952 sc->sc_rdelayprob);
953 sbuf_printf(sb, "%s<WriteDelayedProb>%u</WriteDelayedProb>\n", indent,
954 sc->sc_wdelayprob);
955 sbuf_printf(sb, "%s<Delay>%d</Delay>\n", indent, sc->sc_delaymsec);
956 sbuf_printf(sb, "%s<CountUntilFail>%u</CountUntilFail>\n", indent,
957 sc->sc_count_until_fail);
958 sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error);
959 sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads);
960 sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes);
961 sbuf_printf(sb, "%s<Deletes>%ju</Deletes>\n", indent, sc->sc_deletes);
962 sbuf_printf(sb, "%s<Getattrs>%ju</Getattrs>\n", indent, sc->sc_getattrs);
963 sbuf_printf(sb, "%s<Flushes>%ju</Flushes>\n", indent, sc->sc_flushes);
964 sbuf_printf(sb, "%s<Speedups>%ju</Speedups>\n", indent, sc->sc_speedups);
965 sbuf_printf(sb, "%s<Cmd0s>%ju</Cmd0s>\n", indent, sc->sc_cmd0s);
966 sbuf_printf(sb, "%s<Cmd1s>%ju</Cmd1s>\n", indent, sc->sc_cmd1s);
967 sbuf_printf(sb, "%s<Cmd2s>%ju</Cmd2s>\n", indent, sc->sc_cmd2s);
968 sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent,
969 sc->sc_readbytes);
970 sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent,
971 sc->sc_wrotebytes);
972 }
973
974 DECLARE_GEOM_CLASS(g_nop_class, g_nop);
975 MODULE_VERSION(geom_nop, 0);
976