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>
49 #include <sys/ctype.h>
50 #include <sys/fcntl.h>
51 #include <sys/malloc.h>
53 #include <sys/devicestat.h>
54 #include <machine/md_var.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>
69 struct sysctl_ctx_list sysctl_ctx;
70 struct sysctl_oid *sysctl_tree;
76 static g_access_t g_disk_access;
77 static g_start_t g_disk_start;
78 static g_ioctl_t g_disk_ioctl;
79 static g_dumpconf_t g_disk_dumpconf;
80 static g_provgone_t g_disk_providergone;
82 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
84 static struct g_class g_disk_class = {
85 .name = G_DISK_CLASS_NAME,
87 .start = g_disk_start,
88 .access = g_disk_access,
89 .ioctl = g_disk_ioctl,
90 .providergone = g_disk_providergone,
91 .dumpconf = g_disk_dumpconf,
94 SYSCTL_DECL(_kern_geom);
95 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0,
98 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
101 g_disk_access(struct g_provider *pp, int r, int w, int e)
104 struct g_disk_softc *sc;
107 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
111 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
113 * Allow decreasing access count even if disk is not
116 if (r <= 0 && w <= 0 && e <= 0)
124 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
125 if (dp->d_open != NULL) {
126 error = dp->d_open(dp);
127 if (bootverbose && error != 0)
128 printf("Opened disk %s -> %d\n",
133 pp->sectorsize = dp->d_sectorsize;
134 if (dp->d_maxsize == 0) {
135 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
136 dp->d_name, dp->d_unit);
137 dp->d_maxsize = DFLTPHYS;
139 if (dp->d_delmaxsize == 0) {
140 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
141 printf("WARNING: Disk drive %s%d has no "
142 "d_delmaxsize\n", dp->d_name, dp->d_unit);
144 dp->d_delmaxsize = dp->d_maxsize;
146 pp->stripeoffset = dp->d_stripeoffset;
147 pp->stripesize = dp->d_stripesize;
148 dp->d_flags |= DISKFLAG_OPEN;
150 * Do not invoke resize event when initial size was zero.
151 * Some disks report its size only after first opening.
153 if (pp->mediasize == 0)
154 pp->mediasize = dp->d_mediasize;
156 g_resize_provider(pp, dp->d_mediasize);
157 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
158 if (dp->d_close != NULL) {
159 error = dp->d_close(dp);
161 printf("Closed disk %s -> %d\n",
164 sc->state = G_STATE_ACTIVE;
166 led_set(sc->led, "0");
167 dp->d_flags &= ~DISKFLAG_OPEN;
173 g_disk_kerneldump(struct bio *bp, struct disk *dp)
175 struct g_kerneldump *gkd;
178 gkd = (struct g_kerneldump*)bp->bio_data;
179 gp = bp->bio_to->geom;
180 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
181 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
182 if (dp->d_dump == NULL) {
183 g_io_deliver(bp, ENODEV);
186 gkd->di.dumper = dp->d_dump;
188 gkd->di.blocksize = dp->d_sectorsize;
189 gkd->di.maxiosize = dp->d_maxsize;
190 gkd->di.mediaoffset = gkd->offset;
191 if ((gkd->offset + gkd->length) > dp->d_mediasize)
192 gkd->length = dp->d_mediasize - gkd->offset;
193 gkd->di.mediasize = gkd->length;
198 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
202 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
203 if (sc->led[0] != 0) {
208 case G_STATE_REBUILD:
218 led_set(sc->led, cmd);
224 g_disk_done(struct bio *bp)
228 struct g_disk_softc *sc;
230 /* See "notes" for why we need a mutex here */
231 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
232 bp2 = bp->bio_parent;
233 sc = bp2->bio_to->private;
234 bp->bio_completed = bp->bio_length - bp->bio_resid;
236 mtx_lock(&sc->done_mtx);
237 if (bp2->bio_error == 0)
238 bp2->bio_error = bp->bio_error;
239 bp2->bio_completed += bp->bio_completed;
241 switch (bp->bio_cmd) {
243 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
249 devstat_end_transaction_bio_bt(sc->dp->d_devstat, bp, &now);
255 if (bp2->bio_children == bp2->bio_inbed) {
256 mtx_unlock(&sc->done_mtx);
257 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
258 g_io_deliver(bp2, bp2->bio_error);
260 mtx_unlock(&sc->done_mtx);
265 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
268 struct g_disk_softc *sc;
274 if (dp->d_ioctl == NULL)
276 error = dp->d_ioctl(dp, cmd, data, fflag, td);
281 g_disk_maxsize(struct disk *dp, struct bio *bp)
283 if (bp->bio_cmd == BIO_DELETE)
284 return (dp->d_delmaxsize);
285 return (dp->d_maxsize);
289 g_disk_maxsegs(struct disk *dp, struct bio *bp)
291 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
295 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
298 bp->bio_offset += off;
299 bp->bio_length -= off;
301 if ((bp->bio_flags & BIO_VLIST) != 0) {
302 bus_dma_segment_t *seg, *end;
304 seg = (bus_dma_segment_t *)bp->bio_data;
305 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
306 off += bp->bio_ma_offset;
307 while (off >= seg->ds_len) {
308 KASSERT((seg != end),
309 ("vlist request runs off the end"));
313 bp->bio_ma_offset = off;
314 bp->bio_ma_n = end - seg;
315 bp->bio_data = (void *)seg;
316 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
317 bp->bio_ma += off / PAGE_SIZE;
318 bp->bio_ma_offset += off;
319 bp->bio_ma_offset %= PAGE_SIZE;
320 bp->bio_ma_n -= off / PAGE_SIZE;
327 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
328 off_t *plength, int *ppages)
330 uintptr_t seg_page_base;
331 uintptr_t seg_page_end;
339 if (length > seg->ds_len - offset)
340 length = seg->ds_len - offset;
342 seg_page_base = trunc_page(seg->ds_addr + offset);
343 seg_page_end = round_page(seg->ds_addr + offset + length);
344 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
346 if (seg_pages > *ppages) {
348 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
349 (seg->ds_addr + offset);
354 *ppages -= seg_pages;
358 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
360 bus_dma_segment_t *seg, *end;
365 seg = (bus_dma_segment_t *)bp->bio_data;
366 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
367 residual = bp->bio_length;
368 offset = bp->bio_ma_offset;
369 pages = g_disk_maxsegs(dp, bp);
370 while (residual != 0 && pages != 0) {
371 KASSERT((seg != end),
372 ("vlist limit runs off the end"));
373 g_disk_seg_limit(seg, &offset, &residual, &pages);
382 g_disk_limit(struct disk *dp, struct bio *bp)
384 bool limited = false;
387 maxsz = g_disk_maxsize(dp, bp);
390 * XXX: If we have a stripesize we should really use it here.
391 * Care should be taken in the delete case if this is done
392 * as deletes can be very sensitive to size given how they
395 if (bp->bio_length > maxsz) {
396 bp->bio_length = maxsz;
400 if ((bp->bio_flags & BIO_VLIST) != 0) {
401 bus_dma_segment_t *firstseg, *endseg;
404 firstseg = (bus_dma_segment_t*)bp->bio_data;
405 residual = g_disk_vlist_limit(dp, bp, &endseg);
407 bp->bio_ma_n = endseg - firstseg;
408 bp->bio_length -= residual;
411 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
413 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
420 g_disk_start(struct bio *bp)
422 struct bio *bp2, *bp3;
424 struct g_disk_softc *sc;
428 biotrack(bp, __func__);
430 sc = bp->bio_to->private;
431 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
432 g_io_deliver(bp, ENXIO);
436 switch(bp->bio_cmd) {
438 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
445 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
446 (bp->bio_flags & BIO_UNMAPPED) == 0,
447 ("unmapped bio not supported by disk %s", dp->d_name));
450 bp2 = g_clone_bio(bp);
456 if (g_disk_limit(dp, bp2)) {
457 off += bp2->bio_length;
460 * To avoid a race, we need to grab the next bio
461 * before we schedule this one. See "notes".
463 bp3 = g_clone_bio(bp);
465 bp->bio_error = ENOMEM;
467 bp2->bio_done = g_disk_done;
468 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
469 bp2->bio_bcount = bp2->bio_length;
471 mtx_lock(&sc->start_mtx);
472 devstat_start_transaction_bio(dp->d_devstat, bp2);
473 mtx_unlock(&sc->start_mtx);
481 g_disk_advance(dp, bp2, off);
485 /* Give the driver a chance to override */
486 if (dp->d_getattr != NULL) {
487 if (bp->bio_disk == NULL)
489 error = dp->d_getattr(bp);
494 if (g_handleattr_int(bp, "GEOM::candelete",
495 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
497 else if (g_handleattr_int(bp, "GEOM::fwsectors",
500 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
502 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
504 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
506 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
508 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
511 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
514 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
515 dp->d_hba_subvendor))
517 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
518 dp->d_hba_subdevice))
520 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
521 g_disk_kerneldump(bp, dp);
522 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
523 g_disk_setstate(bp, sc);
524 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
525 dp->d_rotation_rate))
531 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
533 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
539 if (bp->bio_cmd == BIO_ZONE) {
540 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
544 g_trace(G_T_BIO, "g_disk_zone(%s)",
547 bp2 = g_clone_bio(bp);
549 g_io_deliver(bp, ENOMEM);
552 bp2->bio_done = g_disk_done;
554 mtx_lock(&sc->start_mtx);
555 devstat_start_transaction_bio(dp->d_devstat, bp2);
556 mtx_unlock(&sc->start_mtx);
563 if (error != EJUSTRETURN)
564 g_io_deliver(bp, error);
569 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
573 struct g_disk_softc *sc;
578 if (sc == NULL || (dp = sc->dp) == NULL)
580 if (indent == NULL) {
581 sbuf_printf(sb, " hd %u", dp->d_fwheads);
582 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
586 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
587 indent, dp->d_fwheads);
588 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
589 indent, dp->d_fwsectors);
592 * "rotationrate" is a little complicated, because the value
593 * returned by the drive might not be the RPM; 0 and 1 are
594 * special cases, and there's also a valid range.
596 sbuf_printf(sb, "%s<rotationrate>", indent);
597 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
598 sbuf_printf(sb, "unknown"); /* don't report RPM. */
599 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
600 sbuf_printf(sb, "0");
601 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
602 (dp->d_rotation_rate <= DISK_RR_MAX))
603 sbuf_printf(sb, "%u", dp->d_rotation_rate);
605 sbuf_printf(sb, "invalid");
606 sbuf_printf(sb, "</rotationrate>\n");
607 if (dp->d_getattr != NULL) {
608 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
611 bp->bio_attribute = "GEOM::ident";
612 bp->bio_length = DISK_IDENT_SIZE;
614 res = dp->d_getattr(bp);
615 sbuf_printf(sb, "%s<ident>", indent);
616 g_conf_printf_escaped(sb, "%s",
617 res == 0 ? buf: dp->d_ident);
618 sbuf_printf(sb, "</ident>\n");
619 bp->bio_attribute = "GEOM::lunid";
620 bp->bio_length = DISK_IDENT_SIZE;
622 if (dp->d_getattr(bp) == 0) {
623 sbuf_printf(sb, "%s<lunid>", indent);
624 g_conf_printf_escaped(sb, "%s", buf);
625 sbuf_printf(sb, "</lunid>\n");
627 bp->bio_attribute = "GEOM::lunname";
628 bp->bio_length = DISK_IDENT_SIZE;
630 if (dp->d_getattr(bp) == 0) {
631 sbuf_printf(sb, "%s<lunname>", indent);
632 g_conf_printf_escaped(sb, "%s", buf);
633 sbuf_printf(sb, "</lunname>\n");
638 sbuf_printf(sb, "%s<ident>", indent);
639 g_conf_printf_escaped(sb, "%s", dp->d_ident);
640 sbuf_printf(sb, "</ident>\n");
642 sbuf_printf(sb, "%s<descr>", indent);
643 g_conf_printf_escaped(sb, "%s", dp->d_descr);
644 sbuf_printf(sb, "</descr>\n");
649 g_disk_resize(void *ptr, int flag)
653 struct g_provider *pp;
655 if (flag == EV_CANCEL)
662 if (dp->d_destroyed || gp == NULL)
665 LIST_FOREACH(pp, &gp->provider, provider) {
666 if (pp->sectorsize != 0 &&
667 pp->sectorsize != dp->d_sectorsize)
668 g_wither_provider(pp, ENXIO);
670 g_resize_provider(pp, dp->d_mediasize);
675 g_disk_create(void *arg, int flag)
678 struct g_provider *pp;
680 struct g_disk_softc *sc;
681 struct disk_alias *dap;
684 if (flag == EV_CANCEL)
689 mtx_pool_lock(mtxpool_sleep, dp);
690 dp->d_init_level = DISK_INIT_START;
693 * If the disk has already gone away, we can just stop here and
694 * call the user's callback to tell him we've cleaned things up.
696 if (dp->d_goneflag != 0) {
697 mtx_pool_unlock(mtxpool_sleep, dp);
698 if (dp->d_gone != NULL)
702 mtx_pool_unlock(mtxpool_sleep, dp);
704 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
705 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
706 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
708 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
710 LIST_FOREACH(dap, &dp->d_aliases, da_next) {
711 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit);
712 g_geom_add_alias(gp, tmpstr);
714 pp = g_new_providerf(gp, "%s", gp->name);
715 devstat_remove_entry(pp->stat);
717 dp->d_devstat->id = pp;
718 pp->mediasize = dp->d_mediasize;
719 pp->sectorsize = dp->d_sectorsize;
720 pp->stripeoffset = dp->d_stripeoffset;
721 pp->stripesize = dp->d_stripesize;
722 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
723 pp->flags |= G_PF_ACCEPT_UNMAPPED;
724 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
725 pp->flags |= G_PF_DIRECT_SEND;
726 pp->flags |= G_PF_DIRECT_RECEIVE;
728 printf("GEOM: new disk %s\n", gp->name);
729 sysctl_ctx_init(&sc->sysctl_ctx);
730 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
731 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
732 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
733 CTLFLAG_RD, 0, tmpstr);
734 if (sc->sysctl_tree != NULL) {
735 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
736 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
737 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
739 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
740 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
741 CTLTYPE_STRING | CTLFLAG_RD, dp, 0, g_disk_sysctl_flags,
742 "A", "Report disk flags");
746 g_error_provider(pp, 0);
748 mtx_pool_lock(mtxpool_sleep, dp);
749 dp->d_init_level = DISK_INIT_DONE;
752 * If the disk has gone away at this stage, start the withering
755 if (dp->d_goneflag != 0) {
756 mtx_pool_unlock(mtxpool_sleep, dp);
757 g_wither_provider(pp, ENXIO);
760 mtx_pool_unlock(mtxpool_sleep, dp);
765 * We get this callback after all of the consumers have gone away, and just
766 * before the provider is freed. If the disk driver provided a d_gone
767 * callback, let them know that it is okay to free resources -- they won't
768 * be getting any more accesses from GEOM.
771 g_disk_providergone(struct g_provider *pp)
774 struct g_disk_softc *sc;
776 sc = (struct g_disk_softc *)pp->private;
778 if (dp != NULL && dp->d_gone != NULL)
780 if (sc->sysctl_tree != NULL) {
781 sysctl_ctx_free(&sc->sysctl_ctx);
782 sc->sysctl_tree = NULL;
784 if (sc->led[0] != 0) {
785 led_set(sc->led, "0");
789 pp->geom->softc = NULL;
790 mtx_destroy(&sc->done_mtx);
791 mtx_destroy(&sc->start_mtx);
796 g_disk_destroy(void *ptr, int flag)
800 struct g_disk_softc *sc;
801 struct disk_alias *dap, *daptmp;
811 g_wither_geom(gp, ENXIO);
813 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
820 * We only allow printable characters in disk ident,
821 * the rest is converted to 'x<HH>'.
824 g_disk_ident_adjust(char *ident, size_t size)
826 char *p, tmp[4], newid[DISK_IDENT_SIZE];
829 for (p = ident; *p != '\0'; p++) {
834 snprintf(tmp, sizeof(tmp), "x%02hhx",
835 *(unsigned char *)p);
837 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
841 strlcpy(ident, newid, size);
849 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
850 LIST_INIT(&dp->d_aliases);
855 disk_create(struct disk *dp, int version)
858 if (version != DISK_VERSION) {
859 printf("WARNING: Attempt to add disk %s%d %s",
860 dp->d_name, dp->d_unit,
861 " using incompatible ABI version of disk(9)\n");
862 printf("WARNING: Ignoring disk %s%d\n",
863 dp->d_name, dp->d_unit);
866 if (dp->d_flags & DISKFLAG_RESERVED) {
867 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
868 dp->d_name, dp->d_unit);
869 printf("WARNING: Ignoring disk %s%d\n",
870 dp->d_name, dp->d_unit);
873 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
874 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
875 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
876 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
877 if (dp->d_devstat == NULL)
878 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
879 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
880 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
883 dp->d_init_level = DISK_INIT_NONE;
885 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
886 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
890 disk_destroy(struct disk *dp)
895 if (dp->d_devstat != NULL)
896 devstat_remove_entry(dp->d_devstat);
897 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
901 disk_add_alias(struct disk *dp, const char *name)
903 struct disk_alias *dap;
905 dap = (struct disk_alias *)g_malloc(
906 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
907 strcpy((char *)(dap + 1), name);
908 dap->da_alias = (const char *)(dap + 1);
909 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
913 disk_gone(struct disk *dp)
916 struct g_provider *pp;
918 mtx_pool_lock(mtxpool_sleep, dp);
922 * If we're still in the process of creating this disk (the
923 * g_disk_create() function is still queued, or is in
924 * progress), the init level will not yet be DISK_INIT_DONE.
926 * If that is the case, g_disk_create() will see d_goneflag
927 * and take care of cleaning things up.
929 * If the disk has already been created, we default to
930 * withering the provider as usual below.
932 * If the caller has not set a d_gone() callback, he will
933 * not be any worse off by returning here, because the geom
934 * has not been fully setup in any case.
936 if (dp->d_init_level < DISK_INIT_DONE) {
937 mtx_pool_unlock(mtxpool_sleep, dp);
940 mtx_pool_unlock(mtxpool_sleep, dp);
944 pp = LIST_FIRST(&gp->provider);
946 KASSERT(LIST_NEXT(pp, provider) == NULL,
947 ("geom %p has more than one provider", gp));
948 g_wither_provider(pp, ENXIO);
954 disk_attr_changed(struct disk *dp, const char *attr, int flag)
957 struct g_provider *pp;
958 char devnamebuf[128];
962 LIST_FOREACH(pp, &gp->provider, provider)
963 (void)g_attr_changed(pp, attr, flag);
964 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
966 devctl_notify("GEOM", "disk", attr, devnamebuf);
970 disk_media_changed(struct disk *dp, int flag)
973 struct g_provider *pp;
977 pp = LIST_FIRST(&gp->provider);
979 KASSERT(LIST_NEXT(pp, provider) == NULL,
980 ("geom %p has more than one provider", gp));
981 g_media_changed(pp, flag);
987 disk_media_gone(struct disk *dp, int flag)
990 struct g_provider *pp;
994 pp = LIST_FIRST(&gp->provider);
996 KASSERT(LIST_NEXT(pp, provider) == NULL,
997 ("geom %p has more than one provider", gp));
998 g_media_gone(pp, flag);
1004 disk_resize(struct disk *dp, int flag)
1007 if (dp->d_destroyed || dp->d_geom == NULL)
1010 return (g_post_event(g_disk_resize, dp, flag, NULL));
1014 g_kern_disks(void *p, int flag __unused)
1022 g_topology_assert();
1023 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1024 sbuf_printf(sb, "%s%s", sp, gp->name);
1031 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1037 sb = sbuf_new_auto();
1038 dp = (struct disk *)arg1;
1039 sbuf_printf(sb, "%b", dp->d_flags,
1045 "\6DIRECTCOMPLETION"
1049 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1055 sysctl_disks(SYSCTL_HANDLER_ARGS)
1060 sb = sbuf_new_auto();
1061 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1062 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1067 SYSCTL_PROC(_kern, OID_AUTO, disks,
1068 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1069 sysctl_disks, "A", "names of available disks");