2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2002 Poul-Henning Kamp
5 * Copyright (c) 2002 Networks Associates Technology, Inc.
8 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
9 * and NAI Labs, the Security Research Division of Network Associates, Inc.
10 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
11 * DARPA CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. The names of the authors may not be used to endorse or promote
22 * products derived from this software without specific prior written
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/sysctl.h>
48 #include <sys/ctype.h>
49 #include <sys/devctl.h>
50 #include <sys/fcntl.h>
51 #include <sys/malloc.h>
54 #include <sys/devicestat.h>
57 #include <sys/mutex.h>
58 #include <geom/geom.h>
59 #include <geom/geom_disk.h>
60 #include <geom/geom_int.h>
62 #include <dev/led/led.h>
64 #include <machine/bus.h>
68 struct devstat *d_devstat;
69 struct sysctl_ctx_list sysctl_ctx;
70 struct sysctl_oid *sysctl_tree;
74 bool flush_notsup_succeed;
77 static g_access_t g_disk_access;
78 static g_start_t g_disk_start;
79 static g_ioctl_t g_disk_ioctl;
80 static g_dumpconf_t g_disk_dumpconf;
81 static g_provgone_t g_disk_providergone;
83 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
85 static struct g_class g_disk_class = {
86 .name = G_DISK_CLASS_NAME,
88 .start = g_disk_start,
89 .access = g_disk_access,
90 .ioctl = g_disk_ioctl,
91 .providergone = g_disk_providergone,
92 .dumpconf = g_disk_dumpconf,
95 SYSCTL_DECL(_kern_geom);
96 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
99 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
102 g_disk_access(struct g_provider *pp, int r, int w, int e)
105 struct g_disk_softc *sc;
108 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
112 if ((dp = sc->dp) == NULL || dp->d_destroyed) {
114 * Allow decreasing access count even if disk is not
117 if (r <= 0 && w <= 0 && e <= 0)
125 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
127 * It would be better to defer this decision to d_open if
128 * it was able to take flags.
130 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
132 if (error == 0 && dp->d_open != NULL)
133 error = dp->d_open(dp);
134 if (bootverbose && error != 0)
135 printf("Opened disk %s -> %d\n", pp->name, error);
138 pp->sectorsize = dp->d_sectorsize;
139 if (dp->d_maxsize == 0) {
140 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
141 dp->d_name, dp->d_unit);
142 dp->d_maxsize = DFLTPHYS;
144 if (dp->d_delmaxsize == 0) {
145 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
146 printf("WARNING: Disk drive %s%d has no "
147 "d_delmaxsize\n", dp->d_name, dp->d_unit);
149 dp->d_delmaxsize = dp->d_maxsize;
151 pp->stripeoffset = dp->d_stripeoffset;
152 pp->stripesize = dp->d_stripesize;
153 dp->d_flags |= DISKFLAG_OPEN;
155 * Do not invoke resize event when initial size was zero.
156 * Some disks report its size only after first opening.
158 if (pp->mediasize == 0)
159 pp->mediasize = dp->d_mediasize;
161 g_resize_provider(pp, dp->d_mediasize);
162 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
163 if (dp->d_close != NULL) {
164 error = dp->d_close(dp);
166 printf("Closed disk %s -> %d\n",
169 sc->state = G_STATE_ACTIVE;
171 led_set(sc->led, "0");
172 dp->d_flags &= ~DISKFLAG_OPEN;
178 g_disk_kerneldump(struct bio *bp, struct disk *dp)
180 struct g_kerneldump *gkd;
183 gkd = (struct g_kerneldump*)bp->bio_data;
184 gp = bp->bio_to->geom;
185 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
186 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
187 if (dp->d_dump == NULL) {
188 g_io_deliver(bp, ENODEV);
191 gkd->di.dumper = dp->d_dump;
193 gkd->di.blocksize = dp->d_sectorsize;
194 gkd->di.maxiosize = dp->d_maxsize;
195 gkd->di.mediaoffset = gkd->offset;
196 if ((gkd->offset + gkd->length) > dp->d_mediasize)
197 gkd->length = dp->d_mediasize - gkd->offset;
198 gkd->di.mediasize = gkd->length;
203 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
207 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
208 if (sc->led[0] != 0) {
213 case G_STATE_REBUILD:
223 led_set(sc->led, cmd);
229 g_disk_done(struct bio *bp)
233 struct g_disk_softc *sc;
235 /* See "notes" for why we need a mutex here */
236 sc = bp->bio_caller1;
237 bp2 = bp->bio_parent;
239 mtx_lock(&sc->done_mtx);
240 if (bp2->bio_error == 0)
241 bp2->bio_error = bp->bio_error;
242 bp2->bio_completed += bp->bio_length - bp->bio_resid;
244 if (bp->bio_cmd == BIO_READ)
245 kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done");
247 switch (bp->bio_cmd) {
249 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
255 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
261 if (bp2->bio_children == bp2->bio_inbed) {
262 mtx_unlock(&sc->done_mtx);
263 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
264 g_io_deliver(bp2, bp2->bio_error);
266 mtx_unlock(&sc->done_mtx);
271 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
274 struct g_disk_softc *sc;
278 KASSERT(dp != NULL && !dp->d_destroyed,
279 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
281 if (dp->d_ioctl == NULL)
283 return (dp->d_ioctl(dp, cmd, data, fflag, td));
287 g_disk_maxsize(struct disk *dp, struct bio *bp)
289 if (bp->bio_cmd == BIO_DELETE)
290 return (dp->d_delmaxsize);
291 return (dp->d_maxsize);
295 g_disk_maxsegs(struct disk *dp, struct bio *bp)
297 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
301 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
304 bp->bio_offset += off;
305 bp->bio_length -= off;
307 if ((bp->bio_flags & BIO_VLIST) != 0) {
308 bus_dma_segment_t *seg, *end;
310 seg = (bus_dma_segment_t *)bp->bio_data;
311 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
312 off += bp->bio_ma_offset;
313 while (off >= seg->ds_len) {
314 KASSERT((seg != end),
315 ("vlist request runs off the end"));
319 bp->bio_ma_offset = off;
320 bp->bio_ma_n = end - seg;
321 bp->bio_data = (void *)seg;
322 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
323 bp->bio_ma += off / PAGE_SIZE;
324 bp->bio_ma_offset += off;
325 bp->bio_ma_offset %= PAGE_SIZE;
326 bp->bio_ma_n -= off / PAGE_SIZE;
333 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
334 off_t *plength, int *ppages)
336 uintptr_t seg_page_base;
337 uintptr_t seg_page_end;
345 if (length > seg->ds_len - offset)
346 length = seg->ds_len - offset;
348 seg_page_base = trunc_page(seg->ds_addr + offset);
349 seg_page_end = round_page(seg->ds_addr + offset + length);
350 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
352 if (seg_pages > *ppages) {
354 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
355 (seg->ds_addr + offset);
360 *ppages -= seg_pages;
364 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
366 bus_dma_segment_t *seg, *end __diagused;
371 seg = (bus_dma_segment_t *)bp->bio_data;
372 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
373 residual = bp->bio_length;
374 offset = bp->bio_ma_offset;
375 pages = g_disk_maxsegs(dp, bp);
376 while (residual != 0 && pages != 0) {
377 KASSERT((seg != end),
378 ("vlist limit runs off the end"));
379 g_disk_seg_limit(seg, &offset, &residual, &pages);
388 g_disk_limit(struct disk *dp, struct bio *bp)
390 bool limited = false;
393 maxsz = g_disk_maxsize(dp, bp);
396 * XXX: If we have a stripesize we should really use it here.
397 * Care should be taken in the delete case if this is done
398 * as deletes can be very sensitive to size given how they
401 if (bp->bio_length > maxsz) {
402 bp->bio_length = maxsz;
406 if ((bp->bio_flags & BIO_VLIST) != 0) {
407 bus_dma_segment_t *firstseg, *endseg;
410 firstseg = (bus_dma_segment_t*)bp->bio_data;
411 residual = g_disk_vlist_limit(dp, bp, &endseg);
413 bp->bio_ma_n = endseg - firstseg;
414 bp->bio_length -= residual;
417 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
419 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
426 g_disk_start(struct bio *bp)
428 struct bio *bp2, *bp3;
430 struct g_disk_softc *sc;
434 biotrack(bp, __func__);
436 sc = bp->bio_to->private;
438 KASSERT(dp != NULL && !dp->d_destroyed,
439 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
441 switch(bp->bio_cmd) {
443 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
450 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
451 (bp->bio_flags & BIO_UNMAPPED) == 0,
452 ("unmapped bio not supported by disk %s", dp->d_name));
454 if (bp->bio_cmd == BIO_WRITE)
455 kmsan_check_bio(bp, "g_disk_start");
459 bp2 = g_clone_bio(bp);
465 if (g_disk_limit(dp, bp2)) {
466 off += bp2->bio_length;
469 * To avoid a race, we need to grab the next bio
470 * before we schedule this one. See "notes".
472 bp3 = g_clone_bio(bp);
474 bp->bio_error = ENOMEM;
476 bp2->bio_done = g_disk_done;
477 bp2->bio_caller1 = sc;
478 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
479 bp2->bio_bcount = bp2->bio_length;
481 devstat_start_transaction_bio(dp->d_devstat, bp2);
489 g_disk_advance(dp, bp2, off);
493 /* Give the driver a chance to override */
494 if (dp->d_getattr != NULL) {
495 if (bp->bio_disk == NULL)
497 error = dp->d_getattr(bp);
502 if (g_handleattr_int(bp, "GEOM::candelete",
503 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
505 else if (g_handleattr_int(bp, "GEOM::fwsectors",
508 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
510 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
512 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
514 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
517 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
520 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
521 dp->d_hba_subvendor))
523 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
524 dp->d_hba_subdevice))
526 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
527 g_disk_kerneldump(bp, dp);
528 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
529 g_disk_setstate(bp, sc);
530 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
531 dp->d_rotation_rate))
533 else if (g_handleattr_str(bp, "GEOM::attachment",
540 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
542 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
543 error = (sc->flush_notsup_succeed) ? 0 : EOPNOTSUPP;
548 if (bp->bio_cmd == BIO_ZONE) {
549 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
553 g_trace(G_T_BIO, "g_disk_zone(%s)",
556 bp2 = g_clone_bio(bp);
558 g_io_deliver(bp, ENOMEM);
561 bp2->bio_done = g_disk_done;
562 bp2->bio_caller1 = sc;
564 devstat_start_transaction_bio(dp->d_devstat, bp2);
568 bp2 = g_clone_bio(bp);
570 g_io_deliver(bp, ENOMEM);
573 bp2->bio_done = g_disk_done;
574 bp2->bio_caller1 = sc;
582 if (error != EJUSTRETURN)
583 g_io_deliver(bp, error);
588 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
592 struct g_disk_softc *sc;
597 if (sc == NULL || (dp = sc->dp) == NULL)
599 if (indent == NULL) {
600 sbuf_printf(sb, " hd %u", dp->d_fwheads);
601 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
605 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
606 indent, dp->d_fwheads);
607 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
608 indent, dp->d_fwsectors);
611 * "rotationrate" is a little complicated, because the value
612 * returned by the drive might not be the RPM; 0 and 1 are
613 * special cases, and there's also a valid range.
615 sbuf_printf(sb, "%s<rotationrate>", indent);
616 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
617 sbuf_cat(sb, "unknown"); /* don't report RPM. */
618 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
620 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
621 (dp->d_rotation_rate <= DISK_RR_MAX))
622 sbuf_printf(sb, "%u", dp->d_rotation_rate);
624 sbuf_cat(sb, "invalid");
625 sbuf_cat(sb, "</rotationrate>\n");
626 if (dp->d_getattr != NULL) {
627 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
630 bp->bio_attribute = "GEOM::ident";
631 bp->bio_length = DISK_IDENT_SIZE;
633 res = dp->d_getattr(bp);
634 sbuf_printf(sb, "%s<ident>", indent);
635 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
636 sbuf_cat(sb, "</ident>\n");
637 bp->bio_attribute = "GEOM::lunid";
638 bp->bio_length = DISK_IDENT_SIZE;
640 if (dp->d_getattr(bp) == 0) {
641 sbuf_printf(sb, "%s<lunid>", indent);
642 g_conf_cat_escaped(sb, buf);
643 sbuf_cat(sb, "</lunid>\n");
645 bp->bio_attribute = "GEOM::lunname";
646 bp->bio_length = DISK_IDENT_SIZE;
648 if (dp->d_getattr(bp) == 0) {
649 sbuf_printf(sb, "%s<lunname>", indent);
650 g_conf_cat_escaped(sb, buf);
651 sbuf_cat(sb, "</lunname>\n");
656 sbuf_printf(sb, "%s<ident>", indent);
657 g_conf_cat_escaped(sb, dp->d_ident);
658 sbuf_cat(sb, "</ident>\n");
660 sbuf_printf(sb, "%s<descr>", indent);
661 g_conf_cat_escaped(sb, dp->d_descr);
662 sbuf_cat(sb, "</descr>\n");
667 g_disk_resize(void *ptr, int flag)
671 struct g_provider *pp;
673 if (flag == EV_CANCEL)
680 if (dp->d_destroyed || gp == NULL)
683 LIST_FOREACH(pp, &gp->provider, provider) {
684 if (pp->sectorsize != 0 &&
685 pp->sectorsize != dp->d_sectorsize)
686 g_wither_provider(pp, ENXIO);
688 g_resize_provider(pp, dp->d_mediasize);
693 g_disk_create(void *arg, int flag)
696 struct g_provider *pp;
698 struct g_disk_softc *sc;
699 struct disk_alias *dap;
702 if (flag == EV_CANCEL)
707 mtx_pool_lock(mtxpool_sleep, dp);
708 dp->d_init_level = DISK_INIT_START;
711 * If the disk has already gone away, we can just stop here and
712 * call the user's callback to tell him we've cleaned things up.
714 if (dp->d_goneflag != 0) {
715 mtx_pool_unlock(mtxpool_sleep, dp);
716 if (dp->d_gone != NULL)
720 mtx_pool_unlock(mtxpool_sleep, dp);
722 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
723 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
725 if (dp->d_devstat == NULL) {
726 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
727 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
728 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
730 sc->d_devstat = dp->d_devstat;
731 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
733 pp = g_new_providerf(gp, "%s", gp->name);
734 LIST_FOREACH(dap, &dp->d_aliases, da_next)
735 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit);
736 devstat_remove_entry(pp->stat);
738 dp->d_devstat->id = pp;
739 pp->mediasize = dp->d_mediasize;
740 pp->sectorsize = dp->d_sectorsize;
741 pp->stripeoffset = dp->d_stripeoffset;
742 pp->stripesize = dp->d_stripesize;
743 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
744 pp->flags |= G_PF_ACCEPT_UNMAPPED;
745 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
746 pp->flags |= G_PF_DIRECT_SEND;
747 pp->flags |= G_PF_DIRECT_RECEIVE;
749 printf("GEOM: new disk %s\n", gp->name);
750 sysctl_ctx_init(&sc->sysctl_ctx);
751 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
752 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
753 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
754 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr);
755 if (sc->sysctl_tree != NULL) {
756 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
757 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
758 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
760 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
761 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
762 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0,
763 g_disk_sysctl_flags, "A", "Report disk flags");
764 SYSCTL_ADD_BOOL(&sc->sysctl_ctx,
765 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flush_notsup_succeed",
766 CTLFLAG_RWTUN, &sc->flush_notsup_succeed, sizeof(sc->flush_notsup_succeed),
767 "Do not return EOPNOTSUPP if there is no cache to flush");
771 g_error_provider(pp, 0);
773 mtx_pool_lock(mtxpool_sleep, dp);
774 dp->d_init_level = DISK_INIT_DONE;
777 * If the disk has gone away at this stage, start the withering
780 if (dp->d_goneflag != 0) {
781 mtx_pool_unlock(mtxpool_sleep, dp);
782 g_wither_provider(pp, ENXIO);
785 mtx_pool_unlock(mtxpool_sleep, dp);
790 * We get this callback after all of the consumers have gone away, and just
791 * before the provider is freed. If the disk driver provided a d_gone
792 * callback, let them know that it is okay to free resources -- they won't
793 * be getting any more accesses from GEOM.
796 g_disk_providergone(struct g_provider *pp)
799 struct g_disk_softc *sc;
801 sc = (struct g_disk_softc *)pp->private;
803 if (dp != NULL && dp->d_gone != NULL)
805 if (sc->sysctl_tree != NULL) {
806 sysctl_ctx_free(&sc->sysctl_ctx);
807 sc->sysctl_tree = NULL;
809 if (sc->led[0] != 0) {
810 led_set(sc->led, "0");
814 pp->geom->softc = NULL;
815 mtx_destroy(&sc->done_mtx);
820 g_disk_destroy(void *ptr, int flag)
824 struct g_disk_softc *sc;
825 struct disk_alias *dap, *daptmp;
835 g_wither_geom(gp, ENXIO);
837 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
844 * We only allow printable characters in disk ident,
845 * the rest is converted to 'x<HH>'.
848 g_disk_ident_adjust(char *ident, size_t size)
850 char *p, tmp[4], newid[DISK_IDENT_SIZE];
853 for (p = ident; *p != '\0'; p++) {
858 snprintf(tmp, sizeof(tmp), "x%02hhx",
859 *(unsigned char *)p);
861 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
865 strlcpy(ident, newid, size);
873 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
874 LIST_INIT(&dp->d_aliases);
875 dp->d_init_level = DISK_INIT_NONE;
876 dp->d_cevent = g_alloc_event(M_WAITOK);
877 dp->d_devent = g_alloc_event(M_WAITOK);
882 disk_create(struct disk *dp, int version)
885 if (version != DISK_VERSION) {
886 printf("WARNING: Attempt to add disk %s%d %s",
887 dp->d_name, dp->d_unit,
888 " using incompatible ABI version of disk(9)\n");
889 printf("WARNING: Ignoring disk %s%d\n",
890 dp->d_name, dp->d_unit);
893 if (dp->d_flags & DISKFLAG_RESERVED) {
894 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
895 dp->d_name, dp->d_unit);
896 printf("WARNING: Ignoring disk %s%d\n",
897 dp->d_name, dp->d_unit);
900 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
901 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
902 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
903 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
904 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
906 dp->d_init_level = DISK_INIT_CREATE;
908 KASSERT(dp->d_cevent != NULL,
909 ("Disk create for %p with event NULL", dp));
910 g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL);
914 disk_destroy(struct disk *dp)
916 struct disk_alias *dap, *daptmp;
918 /* If disk_create() was never called, just free the resources. */
919 if (dp->d_init_level < DISK_INIT_CREATE) {
920 if (dp->d_devstat != NULL)
921 devstat_remove_entry(dp->d_devstat);
922 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
924 g_free(dp->d_cevent);
925 g_free(dp->d_devent);
930 KASSERT(dp->d_devent != NULL,
931 ("Disk destroy for %p with event NULL", dp));
935 if (dp->d_devstat != NULL)
936 devstat_remove_entry(dp->d_devstat);
937 g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL);
941 disk_add_alias(struct disk *dp, const char *name)
943 struct disk_alias *dap;
945 dap = (struct disk_alias *)g_malloc(
946 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
947 strcpy((char *)(dap + 1), name);
948 dap->da_alias = (const char *)(dap + 1);
949 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
953 disk_gone(struct disk *dp)
956 struct g_provider *pp;
958 mtx_pool_lock(mtxpool_sleep, dp);
961 * Second wither call makes no sense, plus we can not access the list
962 * of providers without topology lock after calling wither once.
964 if (dp->d_goneflag != 0) {
965 mtx_pool_unlock(mtxpool_sleep, dp);
972 * If we're still in the process of creating this disk (the
973 * g_disk_create() function is still queued, or is in
974 * progress), the init level will not yet be DISK_INIT_DONE.
976 * If that is the case, g_disk_create() will see d_goneflag
977 * and take care of cleaning things up.
979 * If the disk has already been created, we default to
980 * withering the provider as usual below.
982 * If the caller has not set a d_gone() callback, he will
983 * not be any worse off by returning here, because the geom
984 * has not been fully setup in any case.
986 if (dp->d_init_level < DISK_INIT_DONE) {
987 mtx_pool_unlock(mtxpool_sleep, dp);
990 mtx_pool_unlock(mtxpool_sleep, dp);
993 pp = LIST_FIRST(&gp->provider);
995 KASSERT(LIST_NEXT(pp, provider) == NULL,
996 ("geom %p has more than one provider", gp));
997 g_wither_provider(pp, ENXIO);
1002 disk_attr_changed(struct disk *dp, const char *attr, int flag)
1004 struct g_geom *gp = dp->d_geom;
1005 struct g_provider *pp;
1006 char devnamebuf[128];
1010 LIST_FOREACH(pp, &gp->provider, provider)
1011 (void)g_attr_changed(pp, attr, flag);
1012 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
1014 devctl_notify("GEOM", "disk", attr, devnamebuf);
1018 disk_media_changed(struct disk *dp, int flag)
1020 struct g_geom *gp = dp->d_geom;
1021 struct g_provider *pp;
1025 pp = LIST_FIRST(&gp->provider);
1027 KASSERT(LIST_NEXT(pp, provider) == NULL,
1028 ("geom %p has more than one provider", gp));
1029 g_media_changed(pp, flag);
1034 disk_media_gone(struct disk *dp, int flag)
1036 struct g_geom *gp = dp->d_geom;
1037 struct g_provider *pp;
1041 pp = LIST_FIRST(&gp->provider);
1043 KASSERT(LIST_NEXT(pp, provider) == NULL,
1044 ("geom %p has more than one provider", gp));
1045 g_media_gone(pp, flag);
1050 disk_resize(struct disk *dp, int flag)
1053 if (dp->d_destroyed || dp->d_geom == NULL)
1056 return (g_post_event(g_disk_resize, dp, flag, NULL));
1060 g_kern_disks(void *p, int flag __unused)
1068 g_topology_assert();
1069 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1070 sbuf_printf(sb, "%s%s", sp, gp->name);
1077 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1083 sb = sbuf_new_auto();
1084 dp = (struct disk *)arg1;
1085 sbuf_printf(sb, "%b", dp->d_flags,
1091 "\6DIRECTCOMPLETION"
1096 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1102 sysctl_disks(SYSCTL_HANDLER_ARGS)
1107 sb = sbuf_new_auto();
1108 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1109 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1114 SYSCTL_PROC(_kern, OID_AUTO, disks,
1115 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1116 sysctl_disks, "A", "names of available disks");