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>
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/sysctl.h>
46 #include <sys/ctype.h>
47 #include <sys/devctl.h>
48 #include <sys/fcntl.h>
49 #include <sys/malloc.h>
52 #include <sys/devicestat.h>
55 #include <sys/mutex.h>
56 #include <geom/geom.h>
57 #include <geom/geom_disk.h>
58 #include <geom/geom_int.h>
60 #include <dev/led/led.h>
62 #include <machine/bus.h>
66 struct devstat *d_devstat;
67 struct sysctl_ctx_list sysctl_ctx;
68 struct sysctl_oid *sysctl_tree;
72 bool flush_notsup_succeed;
75 static g_access_t g_disk_access;
76 static g_start_t g_disk_start;
77 static g_ioctl_t g_disk_ioctl;
78 static g_dumpconf_t g_disk_dumpconf;
79 static g_provgone_t g_disk_providergone;
81 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
83 static struct g_class g_disk_class = {
84 .name = G_DISK_CLASS_NAME,
86 .start = g_disk_start,
87 .access = g_disk_access,
88 .ioctl = g_disk_ioctl,
89 .providergone = g_disk_providergone,
90 .dumpconf = g_disk_dumpconf,
93 SYSCTL_DECL(_kern_geom);
94 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
97 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
100 g_disk_access(struct g_provider *pp, int r, int w, int e)
103 struct g_disk_softc *sc;
106 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
110 if ((dp = sc->dp) == NULL || dp->d_destroyed) {
112 * Allow decreasing access count even if disk is not
115 if (r <= 0 && w <= 0 && e <= 0)
123 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
125 * It would be better to defer this decision to d_open if
126 * it was able to take flags.
128 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
130 if (error == 0 && dp->d_open != NULL)
131 error = dp->d_open(dp);
132 if (bootverbose && error != 0)
133 printf("Opened disk %s -> %d\n", pp->name, error);
136 pp->sectorsize = dp->d_sectorsize;
137 if (dp->d_maxsize == 0) {
138 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
139 dp->d_name, dp->d_unit);
140 dp->d_maxsize = DFLTPHYS;
142 if (dp->d_delmaxsize == 0) {
143 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
144 printf("WARNING: Disk drive %s%d has no "
145 "d_delmaxsize\n", dp->d_name, dp->d_unit);
147 dp->d_delmaxsize = dp->d_maxsize;
149 pp->stripeoffset = dp->d_stripeoffset;
150 pp->stripesize = dp->d_stripesize;
151 dp->d_flags |= DISKFLAG_OPEN;
153 * Do not invoke resize event when initial size was zero.
154 * Some disks report its size only after first opening.
156 if (pp->mediasize == 0)
157 pp->mediasize = dp->d_mediasize;
159 g_resize_provider(pp, dp->d_mediasize);
160 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
161 if (dp->d_close != NULL) {
162 error = dp->d_close(dp);
164 printf("Closed disk %s -> %d\n",
167 sc->state = G_STATE_ACTIVE;
169 led_set(sc->led, "0");
170 dp->d_flags &= ~DISKFLAG_OPEN;
176 g_disk_kerneldump(struct bio *bp, struct disk *dp)
178 struct g_kerneldump *gkd;
181 gkd = (struct g_kerneldump*)bp->bio_data;
182 gp = bp->bio_to->geom;
183 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
184 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
185 if (dp->d_dump == NULL) {
186 g_io_deliver(bp, ENODEV);
189 gkd->di.dumper = dp->d_dump;
191 gkd->di.blocksize = dp->d_sectorsize;
192 gkd->di.maxiosize = dp->d_maxsize;
193 gkd->di.mediaoffset = gkd->offset;
194 if ((gkd->offset + gkd->length) > dp->d_mediasize)
195 gkd->length = dp->d_mediasize - gkd->offset;
196 gkd->di.mediasize = gkd->length;
201 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
205 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
206 if (sc->led[0] != 0) {
211 case G_STATE_REBUILD:
221 led_set(sc->led, cmd);
227 g_disk_done(struct bio *bp)
231 struct g_disk_softc *sc;
233 /* See "notes" for why we need a mutex here */
234 sc = bp->bio_caller1;
235 bp2 = bp->bio_parent;
237 mtx_lock(&sc->done_mtx);
238 if (bp2->bio_error == 0)
239 bp2->bio_error = bp->bio_error;
240 bp2->bio_completed += bp->bio_length - bp->bio_resid;
242 if (bp->bio_cmd == BIO_READ)
243 kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done");
245 switch (bp->bio_cmd) {
247 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
253 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
259 if (bp2->bio_children == bp2->bio_inbed) {
260 mtx_unlock(&sc->done_mtx);
261 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
262 g_io_deliver(bp2, bp2->bio_error);
264 mtx_unlock(&sc->done_mtx);
269 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
272 struct g_disk_softc *sc;
276 KASSERT(dp != NULL && !dp->d_destroyed,
277 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
279 if (dp->d_ioctl == NULL)
281 return (dp->d_ioctl(dp, cmd, data, fflag, td));
285 g_disk_maxsize(struct disk *dp, struct bio *bp)
287 if (bp->bio_cmd == BIO_DELETE)
288 return (dp->d_delmaxsize);
289 return (dp->d_maxsize);
293 g_disk_maxsegs(struct disk *dp, struct bio *bp)
295 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
299 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
302 bp->bio_offset += off;
303 bp->bio_length -= off;
305 if ((bp->bio_flags & BIO_VLIST) != 0) {
306 bus_dma_segment_t *seg, *end;
308 seg = (bus_dma_segment_t *)bp->bio_data;
309 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
310 off += bp->bio_ma_offset;
311 while (off >= seg->ds_len) {
312 KASSERT((seg != end),
313 ("vlist request runs off the end"));
317 bp->bio_ma_offset = off;
318 bp->bio_ma_n = end - seg;
319 bp->bio_data = (void *)seg;
320 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
321 bp->bio_ma += off / PAGE_SIZE;
322 bp->bio_ma_offset += off;
323 bp->bio_ma_offset %= PAGE_SIZE;
324 bp->bio_ma_n -= off / PAGE_SIZE;
331 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
332 off_t *plength, int *ppages)
334 uintptr_t seg_page_base;
335 uintptr_t seg_page_end;
343 if (length > seg->ds_len - offset)
344 length = seg->ds_len - offset;
346 seg_page_base = trunc_page(seg->ds_addr + offset);
347 seg_page_end = round_page(seg->ds_addr + offset + length);
348 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
350 if (seg_pages > *ppages) {
352 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
353 (seg->ds_addr + offset);
358 *ppages -= seg_pages;
362 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
364 bus_dma_segment_t *seg, *end __diagused;
369 seg = (bus_dma_segment_t *)bp->bio_data;
370 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
371 residual = bp->bio_length;
372 offset = bp->bio_ma_offset;
373 pages = g_disk_maxsegs(dp, bp);
374 while (residual != 0 && pages != 0) {
375 KASSERT((seg != end),
376 ("vlist limit runs off the end"));
377 g_disk_seg_limit(seg, &offset, &residual, &pages);
386 g_disk_limit(struct disk *dp, struct bio *bp)
388 bool limited = false;
391 maxsz = g_disk_maxsize(dp, bp);
394 * XXX: If we have a stripesize we should really use it here.
395 * Care should be taken in the delete case if this is done
396 * as deletes can be very sensitive to size given how they
399 if (bp->bio_length > maxsz) {
400 bp->bio_length = maxsz;
404 if ((bp->bio_flags & BIO_VLIST) != 0) {
405 bus_dma_segment_t *firstseg, *endseg;
408 firstseg = (bus_dma_segment_t*)bp->bio_data;
409 residual = g_disk_vlist_limit(dp, bp, &endseg);
411 bp->bio_ma_n = endseg - firstseg;
412 bp->bio_length -= residual;
415 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
417 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
424 g_disk_start(struct bio *bp)
426 struct bio *bp2, *bp3;
428 struct g_disk_softc *sc;
432 biotrack(bp, __func__);
434 sc = bp->bio_to->private;
436 KASSERT(dp != NULL && !dp->d_destroyed,
437 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
439 switch(bp->bio_cmd) {
441 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
448 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
449 (bp->bio_flags & BIO_UNMAPPED) == 0,
450 ("unmapped bio not supported by disk %s", dp->d_name));
452 if (bp->bio_cmd == BIO_WRITE)
453 kmsan_check_bio(bp, "g_disk_start");
457 bp2 = g_clone_bio(bp);
463 if (g_disk_limit(dp, bp2)) {
464 off += bp2->bio_length;
467 * To avoid a race, we need to grab the next bio
468 * before we schedule this one. See "notes".
470 bp3 = g_clone_bio(bp);
472 bp->bio_error = ENOMEM;
474 bp2->bio_done = g_disk_done;
475 bp2->bio_caller1 = sc;
476 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
477 bp2->bio_bcount = bp2->bio_length;
479 devstat_start_transaction_bio(dp->d_devstat, bp2);
487 g_disk_advance(dp, bp2, off);
491 /* Give the driver a chance to override */
492 if (dp->d_getattr != NULL) {
493 if (bp->bio_disk == NULL)
495 error = dp->d_getattr(bp);
500 if (g_handleattr_int(bp, "GEOM::candelete",
501 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
503 else if (g_handleattr_int(bp, "GEOM::fwsectors",
506 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
508 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
510 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
512 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
515 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
518 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
519 dp->d_hba_subvendor))
521 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
522 dp->d_hba_subdevice))
524 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
525 g_disk_kerneldump(bp, dp);
526 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
527 g_disk_setstate(bp, sc);
528 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
529 dp->d_rotation_rate))
531 else if (g_handleattr_str(bp, "GEOM::attachment",
538 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
540 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
541 error = (sc->flush_notsup_succeed) ? 0 : EOPNOTSUPP;
546 if (bp->bio_cmd == BIO_ZONE) {
547 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
551 g_trace(G_T_BIO, "g_disk_zone(%s)",
554 bp2 = g_clone_bio(bp);
556 g_io_deliver(bp, ENOMEM);
559 bp2->bio_done = g_disk_done;
560 bp2->bio_caller1 = sc;
562 devstat_start_transaction_bio(dp->d_devstat, bp2);
566 bp2 = g_clone_bio(bp);
568 g_io_deliver(bp, ENOMEM);
571 bp2->bio_done = g_disk_done;
572 bp2->bio_caller1 = sc;
580 if (error != EJUSTRETURN)
581 g_io_deliver(bp, error);
586 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
590 struct g_disk_softc *sc;
595 if (sc == NULL || (dp = sc->dp) == NULL)
597 if (indent == NULL) {
598 sbuf_printf(sb, " hd %u", dp->d_fwheads);
599 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
603 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
604 indent, dp->d_fwheads);
605 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
606 indent, dp->d_fwsectors);
609 * "rotationrate" is a little complicated, because the value
610 * returned by the drive might not be the RPM; 0 and 1 are
611 * special cases, and there's also a valid range.
613 sbuf_printf(sb, "%s<rotationrate>", indent);
614 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
615 sbuf_cat(sb, "unknown"); /* don't report RPM. */
616 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
618 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
619 (dp->d_rotation_rate <= DISK_RR_MAX))
620 sbuf_printf(sb, "%u", dp->d_rotation_rate);
622 sbuf_cat(sb, "invalid");
623 sbuf_cat(sb, "</rotationrate>\n");
624 if (dp->d_getattr != NULL) {
625 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
628 bp->bio_attribute = "GEOM::ident";
629 bp->bio_length = DISK_IDENT_SIZE;
631 res = dp->d_getattr(bp);
632 sbuf_printf(sb, "%s<ident>", indent);
633 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
634 sbuf_cat(sb, "</ident>\n");
635 bp->bio_attribute = "GEOM::lunid";
636 bp->bio_length = DISK_IDENT_SIZE;
638 if (dp->d_getattr(bp) == 0) {
639 sbuf_printf(sb, "%s<lunid>", indent);
640 g_conf_cat_escaped(sb, buf);
641 sbuf_cat(sb, "</lunid>\n");
643 bp->bio_attribute = "GEOM::lunname";
644 bp->bio_length = DISK_IDENT_SIZE;
646 if (dp->d_getattr(bp) == 0) {
647 sbuf_printf(sb, "%s<lunname>", indent);
648 g_conf_cat_escaped(sb, buf);
649 sbuf_cat(sb, "</lunname>\n");
654 sbuf_printf(sb, "%s<ident>", indent);
655 g_conf_cat_escaped(sb, dp->d_ident);
656 sbuf_cat(sb, "</ident>\n");
658 sbuf_printf(sb, "%s<descr>", indent);
659 g_conf_cat_escaped(sb, dp->d_descr);
660 sbuf_cat(sb, "</descr>\n");
665 g_disk_resize(void *ptr, int flag)
669 struct g_provider *pp;
671 if (flag == EV_CANCEL)
678 if (dp->d_destroyed || gp == NULL)
681 LIST_FOREACH(pp, &gp->provider, provider) {
682 if (pp->sectorsize != 0 &&
683 pp->sectorsize != dp->d_sectorsize)
684 g_wither_provider(pp, ENXIO);
686 g_resize_provider(pp, dp->d_mediasize);
691 g_disk_create(void *arg, int flag)
694 struct g_provider *pp;
696 struct g_disk_softc *sc;
697 struct disk_alias *dap;
700 if (flag == EV_CANCEL)
705 mtx_pool_lock(mtxpool_sleep, dp);
706 dp->d_init_level = DISK_INIT_START;
709 * If the disk has already gone away, we can just stop here and
710 * call the user's callback to tell him we've cleaned things up.
712 if (dp->d_goneflag != 0) {
713 mtx_pool_unlock(mtxpool_sleep, dp);
714 if (dp->d_gone != NULL)
718 mtx_pool_unlock(mtxpool_sleep, dp);
720 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
721 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
723 if (dp->d_devstat == NULL) {
724 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
725 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
726 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
728 sc->d_devstat = dp->d_devstat;
729 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
731 pp = g_new_providerf(gp, "%s", gp->name);
732 LIST_FOREACH(dap, &dp->d_aliases, da_next)
733 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit);
734 devstat_remove_entry(pp->stat);
736 dp->d_devstat->id = pp;
737 pp->mediasize = dp->d_mediasize;
738 pp->sectorsize = dp->d_sectorsize;
739 pp->stripeoffset = dp->d_stripeoffset;
740 pp->stripesize = dp->d_stripesize;
741 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
742 pp->flags |= G_PF_ACCEPT_UNMAPPED;
743 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
744 pp->flags |= G_PF_DIRECT_SEND;
745 pp->flags |= G_PF_DIRECT_RECEIVE;
747 printf("GEOM: new disk %s\n", gp->name);
748 sysctl_ctx_init(&sc->sysctl_ctx);
749 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
750 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
751 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
752 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr);
753 if (sc->sysctl_tree != NULL) {
754 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
755 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
756 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
758 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
759 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
760 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0,
761 g_disk_sysctl_flags, "A", "Report disk flags");
762 SYSCTL_ADD_BOOL(&sc->sysctl_ctx,
763 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flush_notsup_succeed",
764 CTLFLAG_RWTUN, &sc->flush_notsup_succeed, sizeof(sc->flush_notsup_succeed),
765 "Do not return EOPNOTSUPP if there is no cache to flush");
769 g_error_provider(pp, 0);
771 mtx_pool_lock(mtxpool_sleep, dp);
772 dp->d_init_level = DISK_INIT_DONE;
775 * If the disk has gone away at this stage, start the withering
778 if (dp->d_goneflag != 0) {
779 mtx_pool_unlock(mtxpool_sleep, dp);
780 g_wither_provider(pp, ENXIO);
783 mtx_pool_unlock(mtxpool_sleep, dp);
788 * We get this callback after all of the consumers have gone away, and just
789 * before the provider is freed. If the disk driver provided a d_gone
790 * callback, let them know that it is okay to free resources -- they won't
791 * be getting any more accesses from GEOM.
794 g_disk_providergone(struct g_provider *pp)
797 struct g_disk_softc *sc;
799 sc = (struct g_disk_softc *)pp->private;
801 if (dp != NULL && dp->d_gone != NULL)
803 if (sc->sysctl_tree != NULL) {
804 sysctl_ctx_free(&sc->sysctl_ctx);
805 sc->sysctl_tree = NULL;
807 if (sc->led[0] != 0) {
808 led_set(sc->led, "0");
812 pp->geom->softc = NULL;
813 mtx_destroy(&sc->done_mtx);
818 g_disk_destroy(void *ptr, int flag)
822 struct g_disk_softc *sc;
823 struct disk_alias *dap, *daptmp;
833 g_wither_geom(gp, ENXIO);
835 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
842 * We only allow printable characters in disk ident,
843 * the rest is converted to 'x<HH>'.
846 g_disk_ident_adjust(char *ident, size_t size)
848 char *p, tmp[4], newid[DISK_IDENT_SIZE];
851 for (p = ident; *p != '\0'; p++) {
856 snprintf(tmp, sizeof(tmp), "x%02hhx",
857 *(unsigned char *)p);
859 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
863 strlcpy(ident, newid, size);
871 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
872 LIST_INIT(&dp->d_aliases);
873 dp->d_init_level = DISK_INIT_NONE;
874 dp->d_cevent = g_alloc_event(M_WAITOK);
875 dp->d_devent = g_alloc_event(M_WAITOK);
880 disk_create(struct disk *dp, int version)
883 if (version != DISK_VERSION) {
884 printf("WARNING: Attempt to add disk %s%d %s",
885 dp->d_name, dp->d_unit,
886 " using incompatible ABI version of disk(9)\n");
887 printf("WARNING: Ignoring disk %s%d\n",
888 dp->d_name, dp->d_unit);
891 if (dp->d_flags & DISKFLAG_RESERVED) {
892 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
893 dp->d_name, dp->d_unit);
894 printf("WARNING: Ignoring disk %s%d\n",
895 dp->d_name, dp->d_unit);
898 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
899 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
900 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
901 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
902 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
904 dp->d_init_level = DISK_INIT_CREATE;
906 KASSERT(dp->d_cevent != NULL,
907 ("Disk create for %p with event NULL", dp));
908 g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL);
912 disk_destroy(struct disk *dp)
914 struct disk_alias *dap, *daptmp;
916 /* If disk_create() was never called, just free the resources. */
917 if (dp->d_init_level < DISK_INIT_CREATE) {
918 if (dp->d_devstat != NULL)
919 devstat_remove_entry(dp->d_devstat);
920 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
922 g_free(dp->d_cevent);
923 g_free(dp->d_devent);
928 KASSERT(dp->d_devent != NULL,
929 ("Disk destroy for %p with event NULL", dp));
933 if (dp->d_devstat != NULL)
934 devstat_remove_entry(dp->d_devstat);
935 g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL);
939 disk_add_alias(struct disk *dp, const char *name)
941 struct disk_alias *dap;
943 dap = (struct disk_alias *)g_malloc(
944 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
945 strcpy((char *)(dap + 1), name);
946 dap->da_alias = (const char *)(dap + 1);
947 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
951 disk_gone(struct disk *dp)
954 struct g_provider *pp;
956 mtx_pool_lock(mtxpool_sleep, dp);
959 * Second wither call makes no sense, plus we can not access the list
960 * of providers without topology lock after calling wither once.
962 if (dp->d_goneflag != 0) {
963 mtx_pool_unlock(mtxpool_sleep, dp);
970 * If we're still in the process of creating this disk (the
971 * g_disk_create() function is still queued, or is in
972 * progress), the init level will not yet be DISK_INIT_DONE.
974 * If that is the case, g_disk_create() will see d_goneflag
975 * and take care of cleaning things up.
977 * If the disk has already been created, we default to
978 * withering the provider as usual below.
980 * If the caller has not set a d_gone() callback, he will
981 * not be any worse off by returning here, because the geom
982 * has not been fully setup in any case.
984 if (dp->d_init_level < DISK_INIT_DONE) {
985 mtx_pool_unlock(mtxpool_sleep, dp);
988 mtx_pool_unlock(mtxpool_sleep, dp);
991 pp = LIST_FIRST(&gp->provider);
993 KASSERT(LIST_NEXT(pp, provider) == NULL,
994 ("geom %p has more than one provider", gp));
995 g_wither_provider(pp, ENXIO);
1000 disk_attr_changed(struct disk *dp, const char *attr, int flag)
1002 struct g_geom *gp = dp->d_geom;
1003 struct g_provider *pp;
1004 char devnamebuf[128];
1008 LIST_FOREACH(pp, &gp->provider, provider)
1009 (void)g_attr_changed(pp, attr, flag);
1010 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
1012 devctl_notify("GEOM", "disk", attr, devnamebuf);
1016 disk_media_changed(struct disk *dp, int flag)
1018 struct g_geom *gp = dp->d_geom;
1019 struct g_provider *pp;
1023 pp = LIST_FIRST(&gp->provider);
1025 KASSERT(LIST_NEXT(pp, provider) == NULL,
1026 ("geom %p has more than one provider", gp));
1027 g_media_changed(pp, flag);
1032 disk_media_gone(struct disk *dp, int flag)
1034 struct g_geom *gp = dp->d_geom;
1035 struct g_provider *pp;
1039 pp = LIST_FIRST(&gp->provider);
1041 KASSERT(LIST_NEXT(pp, provider) == NULL,
1042 ("geom %p has more than one provider", gp));
1043 g_media_gone(pp, flag);
1048 disk_resize(struct disk *dp, int flag)
1051 if (dp->d_destroyed || dp->d_geom == NULL)
1054 return (g_post_event(g_disk_resize, dp, flag, NULL));
1058 g_kern_disks(void *p, int flag __unused)
1066 g_topology_assert();
1067 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1068 sbuf_printf(sb, "%s%s", sp, gp->name);
1075 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1081 sb = sbuf_new_auto();
1082 dp = (struct disk *)arg1;
1083 sbuf_printf(sb, "%b", dp->d_flags,
1089 "\6DIRECTCOMPLETION"
1094 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1100 sysctl_disks(SYSCTL_HANDLER_ARGS)
1105 sb = sbuf_new_auto();
1106 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1107 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1112 SYSCTL_PROC(_kern, OID_AUTO, disks,
1113 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1114 sysctl_disks, "A", "names of available disks");