1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
4  * Copyright (c) 2002 Poul-Henning Kamp
8  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
10  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
62 		gsp->softc = g_malloc(scsize, M_WAITOK | M_ZERO);  in g_slice_alloc()
64 		gsp->softc = NULL;  in g_slice_alloc()
65 	gsp->slices = g_malloc(nslice * sizeof(struct g_slice),  in g_slice_alloc()
67 	gsp->nslice = nslice;  in g_slice_alloc()
72 g_slice_free(struct g_geom *gp)  in g_slice_free()  argument
76 	gsp = gp->softc;  in g_slice_free()
77 	gp->softc = NULL;  in g_slice_free()
80 	 * We can get multiple spoiled events before wither-washer  in g_slice_free()
86 	g_free(gsp->slices);  in g_slice_free()
87 	g_free(gsp->hotspot);  in g_slice_free()
88 	g_free(gsp->softc);  in g_slice_free()
97 	struct g_geom *gp;  in g_slice_access()  local
103 	gp = pp->geom;  in g_slice_access()
104 	cp = LIST_FIRST(&gp->consumer);  in g_slice_access()
106 	gsp = gp->softc;  in g_slice_access()
108 		gsl = &gsp->slices[pp->index];  in g_slice_access()
109 		for (u = 0; u < gsp->nslice; u++) {  in g_slice_access()
110 			gsl2 = &gsp->slices[u];  in g_slice_access()
111 			if (gsl2->length == 0)  in g_slice_access()
113 			if (u == pp->index)  in g_slice_access()
115 			if (gsl->offset + gsl->length <= gsl2->offset)  in g_slice_access()
117 			if (gsl2->offset + gsl2->length <= gsl->offset)  in g_slice_access()
120 			pp2 = gsl2->provider;  in g_slice_access()
121 			if ((pp->acw + dw) > 0 && pp2->ace > 0)  in g_slice_access()
123 			if ((pp->ace + de) > 0 && pp2->acw > 0)  in g_slice_access()
128 	if (cp->acr == 0 && cp->acw == 0 && cp->ace == 0)  in g_slice_access()
131 	if ((cp->acr + dr) == 0 && (cp->acw + dw) == 0 && (cp->ace + de) == 1)  in g_slice_access()
132 		de--;  in g_slice_access()
139 	if (error == 0 && (gp->flags & G_GEOM_WITHER) != 0 &&  in g_slice_access()
140 	    (cp->acr + cp->acw + cp->ace) == 0)  in g_slice_access()
141 		g_slice_free(gp);  in g_slice_access()
148  * XXX: bio, or only the non-hot bits.  This would get messy if there were
157 	struct g_geom *gp;  in g_slice_finish_hot()  local
163 	KASSERT(bp->bio_to != NULL,  in g_slice_finish_hot()
165 	KASSERT(bp->bio_from != NULL,  in g_slice_finish_hot()
167 	gp = bp->bio_to->geom;  in g_slice_finish_hot()
168 	gsp = gp->softc;  in g_slice_finish_hot()
169 	cp = LIST_FIRST(&gp->consumer);  in g_slice_finish_hot()
171 	idx = bp->bio_to->index;  in g_slice_finish_hot()
172 	gsl = &gsp->slices[idx];  in g_slice_finish_hot()
179 	if (bp2->bio_offset + bp2->bio_length > gsl->length)  in g_slice_finish_hot()
180 		bp2->bio_length = gsl->length - bp2->bio_offset;  in g_slice_finish_hot()
181 	bp2->bio_done = g_std_done;  in g_slice_finish_hot()
182 	bp2->bio_offset += gsl->offset;  in g_slice_finish_hot()
191 	KASSERT(bp->bio_cmd == BIO_GETATTR &&  in g_slice_done()
192 	    strcmp(bp->bio_attribute, "GEOM::ident") == 0,  in g_slice_done()
193 	    ("bio_cmd=0x%x bio_attribute=%s", bp->bio_cmd, bp->bio_attribute));  in g_slice_done()
195 	if (bp->bio_error == 0 && bp->bio_data[0] != '\0') {  in g_slice_done()
200 		    bp->bio_parent->bio_to->index);  in g_slice_done()
201 		if (strlcat(bp->bio_data, idx, bp->bio_length) >=  in g_slice_done()
202 		    bp->bio_length) {  in g_slice_done()
203 			bp->bio_error = EFAULT;  in g_slice_done()
214 	struct g_geom *gp;  in g_slice_start()  local
223 	pp = bp->bio_to;  in g_slice_start()
224 	gp = pp->geom;  in g_slice_start()
225 	gsp = gp->softc;  in g_slice_start()
226 	cp = LIST_FIRST(&gp->consumer);  in g_slice_start()
227 	idx = pp->index;  in g_slice_start()
228 	gsl = &gsp->slices[idx];  in g_slice_start()
229 	switch(bp->bio_cmd) {  in g_slice_start()
233 		if (bp->bio_offset > gsl->length) {  in g_slice_start()
241 		t = bp->bio_offset + gsl->offset;  in g_slice_start()
242 		for (m_index = 0; m_index < gsp->nhotspot; m_index++) {  in g_slice_start()
243 			ghp = &gsp->hotspot[m_index];  in g_slice_start()
244 			if (t >= ghp->offset + ghp->length)  in g_slice_start()
246 			if (t + bp->bio_length <= ghp->offset)  in g_slice_start()
248 			switch(bp->bio_cmd) {  in g_slice_start()
249 			case BIO_READ:		idx = ghp->ract; break;  in g_slice_start()
250 			case BIO_WRITE:		idx = ghp->wact; break;  in g_slice_start()
251 			case BIO_DELETE:	idx = ghp->dact; break;  in g_slice_start()
261 				error = gsp->start(bp);  in g_slice_start()
266 				error = g_post_event(gsp->hot, bp, M_NOWAIT,  in g_slice_start()
267 				    gp, NULL);  in g_slice_start()
279 		if (bp2->bio_offset + bp2->bio_length > gsl->length)  in g_slice_start()
280 			bp2->bio_length = gsl->length - bp2->bio_offset;  in g_slice_start()
281 		bp2->bio_done = g_std_done;  in g_slice_start()
282 		bp2->bio_offset += gsl->offset;  in g_slice_start()
287 		if (gsp->start != NULL && gsp->start(bp))  in g_slice_start()
289 		if (!strcmp("GEOM::ident", bp->bio_attribute)) {  in g_slice_start()
295 			bp2->bio_done = g_slice_done;  in g_slice_start()
299 		if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) {  in g_slice_start()
302 			gkd = (struct g_kerneldump *)bp->bio_data;  in g_slice_start()
303 			gkd->offset += gsp->slices[idx].offset;  in g_slice_start()
304 			if (gkd->length > gsp->slices[idx].length)  in g_slice_start()
305 				gkd->length = gsp->slices[idx].length;  in g_slice_start()
316 		bp2->bio_done = g_std_done;  in g_slice_start()
326 g_slice_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, str…  in g_slice_dumpconf()  argument
330 	gsp = gp->softc;  in g_slice_dumpconf()
332 		sbuf_printf(sb, " i %u", pp->index);  in g_slice_dumpconf()
334 		    (uintmax_t)gsp->slices[pp->index].offset);  in g_slice_dumpconf()
338 		sbuf_printf(sb, "%s<index>%u</index>\n", indent, pp->index);  in g_slice_dumpconf()
340 		    indent, (uintmax_t)gsp->slices[pp->index].length);  in g_slice_dumpconf()
342 		    (uintmax_t)gsp->slices[pp->index].length / 512);  in g_slice_dumpconf()
344 		    (uintmax_t)gsp->slices[pp->index].offset);  in g_slice_dumpconf()
346 		    (uintmax_t)gsp->slices[pp->index].offset / 512);  in g_slice_dumpconf()
351 g_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length, u_int sectorsize,…  in g_slice_config()  argument
361 	     gp->name, idx, how);  in g_slice_config()
363 	gsp = gp->softc;  in g_slice_config()
364 	if (idx >= gsp->nslice)  in g_slice_config()
366 	gsl = &gsp->slices[idx];  in g_slice_config()
367 	pp = gsl->provider;  in g_slice_config()
369 		acc = pp->acr + pp->acw + pp->ace;  in g_slice_config()
373 		if (length < gsl->length)  in g_slice_config()
375 		if (offset != gsl->offset)  in g_slice_config()
381 	gsl->length = length;  in g_slice_config()
382 	gsl->offset = offset;  in g_slice_config()
383 	gsl->sectorsize = sectorsize;  in g_slice_config()
388 			printf("GEOM: Deconfigure %s\n", pp->name);  in g_slice_config()
390 		gsl->provider = NULL;  in g_slice_config()
391 		gsp->nprovider--;  in g_slice_config()
397 			    pp->name, (intmax_t)offset, (intmax_t)length,  in g_slice_config()
398 			    (intmax_t)(offset + length - 1));  in g_slice_config()
399 		g_resize_provider(pp, gsl->length);  in g_slice_config()
407 	pp = g_new_providerf(gp, "%s", sbuf_data(sb));  in g_slice_config()
408 	pp2 = LIST_FIRST(&gp->consumer)->provider;  in g_slice_config()
409 	pp->stripesize = pp2->stripesize;  in g_slice_config()
410 	pp->stripeoffset = pp2->stripeoffset + offset;  in g_slice_config()
411 	if (pp->stripesize > 0)  in g_slice_config()
412 		pp->stripeoffset %= pp->stripesize;  in g_slice_config()
413 	if (gsp->nhotspot == 0) {  in g_slice_config()
414 		pp->flags |= pp2->flags & G_PF_ACCEPT_UNMAPPED;  in g_slice_config()
415 		pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;  in g_slice_config()
419 		    pp->name, (intmax_t)offset, (intmax_t)length,  in g_slice_config()
420 		    (intmax_t)(offset + length - 1));  in g_slice_config()
421 	pp->index = idx;  in g_slice_config()
422 	pp->mediasize = gsl->length;  in g_slice_config()
423 	pp->sectorsize = gsl->sectorsize;  in g_slice_config()
424 	gsl->provider = pp;  in g_slice_config()
425 	gsp->nprovider++;  in g_slice_config()
434  * it contains meta-data used to configure the slicer.
445 g_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int …  in g_slice_conf_hot()  argument
453 	    gp->name, idx, (intmax_t)offset, (intmax_t)length);  in g_slice_conf_hot()
455 	gsp = gp->softc;  in g_slice_conf_hot()
457 	if (gsp->nhotspot == 0) {  in g_slice_conf_hot()
458 		LIST_FOREACH(pp, &gp->provider, provider)  in g_slice_conf_hot()
459 			pp->flags &= ~(G_PF_ACCEPT_UNMAPPED |  in g_slice_conf_hot()
461 		LIST_FOREACH(cp, &gp->consumer, consumer)  in g_slice_conf_hot()
462 			cp->flags &= ~(G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE);  in g_slice_conf_hot()
464 	gsl = gsp->hotspot;  in g_slice_conf_hot()
465 	if(idx >= gsp->nhotspot) {  in g_slice_conf_hot()
467 		if (gsp->hotspot != NULL)  in g_slice_conf_hot()
468 			bcopy(gsp->hotspot, gsl2, gsp->nhotspot * sizeof(*gsl2));  in g_slice_conf_hot()
469 		gsp->hotspot = gsl2;  in g_slice_conf_hot()
470 		if (gsp->hotspot != NULL)  in g_slice_conf_hot()
473 		gsp->nhotspot = idx + 1;  in g_slice_conf_hot()
478 	    || gsp->start != NULL, ("G_SLICE_HOT_START but no slice->start"));  in g_slice_conf_hot()
489 	struct g_geom *gp;  in g_slice_orphan()  local
492 	gp = cp->geom;  in g_slice_orphan()
493 	g_trace(G_T_TOPOLOGY, "%s(%p/%s)", __func__, cp, gp->name);  in g_slice_orphan()
494 	g_wither_geom(gp, ENXIO);  in g_slice_orphan()
500 	if ((cp->acr + cp->acw + cp->ace) == 0)  in g_slice_orphan()
501 		g_slice_free(gp);  in g_slice_orphan()
508 	g_trace(G_T_TOPOLOGY, "%s(%p/%s)", __func__, cp, cp->geom->name);  in g_slice_spoiled()
509 	cp->flags |= G_CF_ORPHAN;  in g_slice_spoiled()
514 g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp)  in g_slice_destroy_geom()  argument
517 	g_slice_spoiled(LIST_FIRST(&gp->consumer));  in g_slice_destroy_geom()
524 	struct g_geom *gp;  in g_slice_new()  local
532 	gp = g_new_geom(mp, pp->name);  in g_slice_new()
534 	gsp->start = start;  in g_slice_new()
535 	gp->softc = gsp;  in g_slice_new()
536 	gp->start = g_slice_start;  in g_slice_new()
537 	gp->access = g_slice_access;  in g_slice_new()
538 	gp->orphan = g_slice_orphan;  in g_slice_new()
539 	gp->spoiled = g_slice_spoiled;  in g_slice_new()
540 	if (gp->dumpconf == NULL)  in g_slice_new()
541 		gp->dumpconf = g_slice_dumpconf;  in g_slice_new()
542 	if (gp->class->destroy_geom == NULL)  in g_slice_new()
543 		gp->class->destroy_geom = g_slice_destroy_geom;  in g_slice_new()
544 	cp = g_new_consumer(gp);  in g_slice_new()
545 	cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;  in g_slice_new()
550 		g_wither_geom(gp, ENXIO);  in g_slice_new()
554 		*vp = gsp->softc;  in g_slice_new()
556 	return (gp);  in g_slice_new()