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) {
126 * It would be better to defer this decision to d_open if
127 * it was able to take flags.
129 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
131 if (error == 0 && dp->d_open != NULL)
132 error = dp->d_open(dp);
133 if (bootverbose && error != 0)
134 printf("Opened disk %s -> %d\n", pp->name, error);
137 pp->sectorsize = dp->d_sectorsize;
138 if (dp->d_maxsize == 0) {
139 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
140 dp->d_name, dp->d_unit);
141 dp->d_maxsize = DFLTPHYS;
143 if (dp->d_delmaxsize == 0) {
144 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
145 printf("WARNING: Disk drive %s%d has no "
146 "d_delmaxsize\n", dp->d_name, dp->d_unit);
148 dp->d_delmaxsize = dp->d_maxsize;
150 pp->stripeoffset = dp->d_stripeoffset;
151 pp->stripesize = dp->d_stripesize;
152 dp->d_flags |= DISKFLAG_OPEN;
154 * Do not invoke resize event when initial size was zero.
155 * Some disks report its size only after first opening.
157 if (pp->mediasize == 0)
158 pp->mediasize = dp->d_mediasize;
160 g_resize_provider(pp, dp->d_mediasize);
161 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
162 if (dp->d_close != NULL) {
163 error = dp->d_close(dp);
165 printf("Closed disk %s -> %d\n",
168 sc->state = G_STATE_ACTIVE;
170 led_set(sc->led, "0");
171 dp->d_flags &= ~DISKFLAG_OPEN;
177 g_disk_kerneldump(struct bio *bp, struct disk *dp)
179 struct g_kerneldump *gkd;
182 gkd = (struct g_kerneldump*)bp->bio_data;
183 gp = bp->bio_to->geom;
184 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
185 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
186 if (dp->d_dump == NULL) {
187 g_io_deliver(bp, ENODEV);
190 gkd->di.dumper = dp->d_dump;
192 gkd->di.blocksize = dp->d_sectorsize;
193 gkd->di.maxiosize = dp->d_maxsize;
194 gkd->di.mediaoffset = gkd->offset;
195 if ((gkd->offset + gkd->length) > dp->d_mediasize)
196 gkd->length = dp->d_mediasize - gkd->offset;
197 gkd->di.mediasize = gkd->length;
202 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
206 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
207 if (sc->led[0] != 0) {
212 case G_STATE_REBUILD:
222 led_set(sc->led, cmd);
228 g_disk_done(struct bio *bp)
232 struct g_disk_softc *sc;
234 /* See "notes" for why we need a mutex here */
235 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
236 bp2 = bp->bio_parent;
237 sc = bp2->bio_to->private;
238 bp->bio_completed = bp->bio_length - bp->bio_resid;
240 mtx_lock(&sc->done_mtx);
241 if (bp2->bio_error == 0)
242 bp2->bio_error = bp->bio_error;
243 bp2->bio_completed += bp->bio_completed;
245 switch (bp->bio_cmd) {
247 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
253 devstat_end_transaction_bio_bt(sc->dp->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;
278 if (dp->d_ioctl == NULL)
280 error = 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;
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;
435 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
436 g_io_deliver(bp, ENXIO);
440 switch(bp->bio_cmd) {
442 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
449 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
450 (bp->bio_flags & BIO_UNMAPPED) == 0,
451 ("unmapped bio not supported by disk %s", dp->d_name));
454 bp2 = g_clone_bio(bp);
460 if (g_disk_limit(dp, bp2)) {
461 off += bp2->bio_length;
464 * To avoid a race, we need to grab the next bio
465 * before we schedule this one. See "notes".
467 bp3 = g_clone_bio(bp);
469 bp->bio_error = ENOMEM;
471 bp2->bio_done = g_disk_done;
472 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
473 bp2->bio_bcount = bp2->bio_length;
475 mtx_lock(&sc->start_mtx);
476 devstat_start_transaction_bio(dp->d_devstat, bp2);
477 mtx_unlock(&sc->start_mtx);
485 g_disk_advance(dp, bp2, off);
489 /* Give the driver a chance to override */
490 if (dp->d_getattr != NULL) {
491 if (bp->bio_disk == NULL)
493 error = dp->d_getattr(bp);
498 if (g_handleattr_int(bp, "GEOM::candelete",
499 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
501 else if (g_handleattr_int(bp, "GEOM::fwsectors",
504 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
506 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
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))
535 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
537 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
543 if (bp->bio_cmd == BIO_ZONE) {
544 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
548 g_trace(G_T_BIO, "g_disk_zone(%s)",
551 bp2 = g_clone_bio(bp);
553 g_io_deliver(bp, ENOMEM);
556 bp2->bio_done = g_disk_done;
558 mtx_lock(&sc->start_mtx);
559 devstat_start_transaction_bio(dp->d_devstat, bp2);
560 mtx_unlock(&sc->start_mtx);
567 if (error != EJUSTRETURN)
568 g_io_deliver(bp, error);
573 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
577 struct g_disk_softc *sc;
582 if (sc == NULL || (dp = sc->dp) == NULL)
584 if (indent == NULL) {
585 sbuf_printf(sb, " hd %u", dp->d_fwheads);
586 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
590 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
591 indent, dp->d_fwheads);
592 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
593 indent, dp->d_fwsectors);
596 * "rotationrate" is a little complicated, because the value
597 * returned by the drive might not be the RPM; 0 and 1 are
598 * special cases, and there's also a valid range.
600 sbuf_printf(sb, "%s<rotationrate>", indent);
601 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
602 sbuf_cat(sb, "unknown"); /* don't report RPM. */
603 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
605 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
606 (dp->d_rotation_rate <= DISK_RR_MAX))
607 sbuf_printf(sb, "%u", dp->d_rotation_rate);
609 sbuf_cat(sb, "invalid");
610 sbuf_cat(sb, "</rotationrate>\n");
611 if (dp->d_getattr != NULL) {
612 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
615 bp->bio_attribute = "GEOM::ident";
616 bp->bio_length = DISK_IDENT_SIZE;
618 res = dp->d_getattr(bp);
619 sbuf_printf(sb, "%s<ident>", indent);
620 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
621 sbuf_cat(sb, "</ident>\n");
622 bp->bio_attribute = "GEOM::lunid";
623 bp->bio_length = DISK_IDENT_SIZE;
625 if (dp->d_getattr(bp) == 0) {
626 sbuf_printf(sb, "%s<lunid>", indent);
627 g_conf_cat_escaped(sb, buf);
628 sbuf_cat(sb, "</lunid>\n");
630 bp->bio_attribute = "GEOM::lunname";
631 bp->bio_length = DISK_IDENT_SIZE;
633 if (dp->d_getattr(bp) == 0) {
634 sbuf_printf(sb, "%s<lunname>", indent);
635 g_conf_cat_escaped(sb, buf);
636 sbuf_cat(sb, "</lunname>\n");
641 sbuf_printf(sb, "%s<ident>", indent);
642 g_conf_cat_escaped(sb, dp->d_ident);
643 sbuf_cat(sb, "</ident>\n");
645 sbuf_printf(sb, "%s<descr>", indent);
646 g_conf_cat_escaped(sb, dp->d_descr);
647 sbuf_cat(sb, "</descr>\n");
652 g_disk_resize(void *ptr, int flag)
656 struct g_provider *pp;
658 if (flag == EV_CANCEL)
665 if (dp->d_destroyed || gp == NULL)
668 LIST_FOREACH(pp, &gp->provider, provider) {
669 if (pp->sectorsize != 0 &&
670 pp->sectorsize != dp->d_sectorsize)
671 g_wither_provider(pp, ENXIO);
673 g_resize_provider(pp, dp->d_mediasize);
678 g_disk_create(void *arg, int flag)
681 struct g_provider *pp;
683 struct g_disk_softc *sc;
684 struct disk_alias *dap;
687 if (flag == EV_CANCEL)
692 mtx_pool_lock(mtxpool_sleep, dp);
693 dp->d_init_level = DISK_INIT_START;
696 * If the disk has already gone away, we can just stop here and
697 * call the user's callback to tell him we've cleaned things up.
699 if (dp->d_goneflag != 0) {
700 mtx_pool_unlock(mtxpool_sleep, dp);
701 if (dp->d_gone != NULL)
705 mtx_pool_unlock(mtxpool_sleep, dp);
707 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
708 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
709 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
711 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
713 LIST_FOREACH(dap, &dp->d_aliases, da_next) {
714 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit);
715 g_geom_add_alias(gp, tmpstr);
717 pp = g_new_providerf(gp, "%s", gp->name);
718 devstat_remove_entry(pp->stat);
720 dp->d_devstat->id = pp;
721 pp->mediasize = dp->d_mediasize;
722 pp->sectorsize = dp->d_sectorsize;
723 pp->stripeoffset = dp->d_stripeoffset;
724 pp->stripesize = dp->d_stripesize;
725 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
726 pp->flags |= G_PF_ACCEPT_UNMAPPED;
727 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
728 pp->flags |= G_PF_DIRECT_SEND;
729 pp->flags |= G_PF_DIRECT_RECEIVE;
731 printf("GEOM: new disk %s\n", gp->name);
732 sysctl_ctx_init(&sc->sysctl_ctx);
733 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
734 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
735 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
736 CTLFLAG_RD, 0, tmpstr);
737 if (sc->sysctl_tree != NULL) {
738 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
739 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
740 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
742 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
743 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
744 CTLTYPE_STRING | CTLFLAG_RD, dp, 0, g_disk_sysctl_flags,
745 "A", "Report disk flags");
749 g_error_provider(pp, 0);
751 mtx_pool_lock(mtxpool_sleep, dp);
752 dp->d_init_level = DISK_INIT_DONE;
755 * If the disk has gone away at this stage, start the withering
758 if (dp->d_goneflag != 0) {
759 mtx_pool_unlock(mtxpool_sleep, dp);
760 g_wither_provider(pp, ENXIO);
763 mtx_pool_unlock(mtxpool_sleep, dp);
768 * We get this callback after all of the consumers have gone away, and just
769 * before the provider is freed. If the disk driver provided a d_gone
770 * callback, let them know that it is okay to free resources -- they won't
771 * be getting any more accesses from GEOM.
774 g_disk_providergone(struct g_provider *pp)
777 struct g_disk_softc *sc;
779 sc = (struct g_disk_softc *)pp->private;
781 if (dp != NULL && dp->d_gone != NULL)
783 if (sc->sysctl_tree != NULL) {
784 sysctl_ctx_free(&sc->sysctl_ctx);
785 sc->sysctl_tree = NULL;
787 if (sc->led[0] != 0) {
788 led_set(sc->led, "0");
792 pp->geom->softc = NULL;
793 mtx_destroy(&sc->done_mtx);
794 mtx_destroy(&sc->start_mtx);
799 g_disk_destroy(void *ptr, int flag)
803 struct g_disk_softc *sc;
804 struct disk_alias *dap, *daptmp;
814 g_wither_geom(gp, ENXIO);
816 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
823 * We only allow printable characters in disk ident,
824 * the rest is converted to 'x<HH>'.
827 g_disk_ident_adjust(char *ident, size_t size)
829 char *p, tmp[4], newid[DISK_IDENT_SIZE];
832 for (p = ident; *p != '\0'; p++) {
837 snprintf(tmp, sizeof(tmp), "x%02hhx",
838 *(unsigned char *)p);
840 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
844 strlcpy(ident, newid, size);
852 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
853 LIST_INIT(&dp->d_aliases);
858 disk_create(struct disk *dp, int version)
861 if (version != DISK_VERSION) {
862 printf("WARNING: Attempt to add disk %s%d %s",
863 dp->d_name, dp->d_unit,
864 " using incompatible ABI version of disk(9)\n");
865 printf("WARNING: Ignoring disk %s%d\n",
866 dp->d_name, dp->d_unit);
869 if (dp->d_flags & DISKFLAG_RESERVED) {
870 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
871 dp->d_name, dp->d_unit);
872 printf("WARNING: Ignoring disk %s%d\n",
873 dp->d_name, dp->d_unit);
876 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
877 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
878 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
879 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
880 if (dp->d_devstat == NULL)
881 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
882 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
883 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
886 dp->d_init_level = DISK_INIT_NONE;
888 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
889 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
893 disk_destroy(struct disk *dp)
898 if (dp->d_devstat != NULL)
899 devstat_remove_entry(dp->d_devstat);
900 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
904 disk_add_alias(struct disk *dp, const char *name)
906 struct disk_alias *dap;
908 dap = (struct disk_alias *)g_malloc(
909 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
910 strcpy((char *)(dap + 1), name);
911 dap->da_alias = (const char *)(dap + 1);
912 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
916 disk_gone(struct disk *dp)
919 struct g_provider *pp;
921 mtx_pool_lock(mtxpool_sleep, dp);
925 * If we're still in the process of creating this disk (the
926 * g_disk_create() function is still queued, or is in
927 * progress), the init level will not yet be DISK_INIT_DONE.
929 * If that is the case, g_disk_create() will see d_goneflag
930 * and take care of cleaning things up.
932 * If the disk has already been created, we default to
933 * withering the provider as usual below.
935 * If the caller has not set a d_gone() callback, he will
936 * not be any worse off by returning here, because the geom
937 * has not been fully setup in any case.
939 if (dp->d_init_level < DISK_INIT_DONE) {
940 mtx_pool_unlock(mtxpool_sleep, dp);
943 mtx_pool_unlock(mtxpool_sleep, dp);
947 pp = LIST_FIRST(&gp->provider);
949 KASSERT(LIST_NEXT(pp, provider) == NULL,
950 ("geom %p has more than one provider", gp));
951 g_wither_provider(pp, ENXIO);
957 disk_attr_changed(struct disk *dp, const char *attr, int flag)
960 struct g_provider *pp;
961 char devnamebuf[128];
965 LIST_FOREACH(pp, &gp->provider, provider)
966 (void)g_attr_changed(pp, attr, flag);
967 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
969 devctl_notify("GEOM", "disk", attr, devnamebuf);
973 disk_media_changed(struct disk *dp, int flag)
976 struct g_provider *pp;
980 pp = LIST_FIRST(&gp->provider);
982 KASSERT(LIST_NEXT(pp, provider) == NULL,
983 ("geom %p has more than one provider", gp));
984 g_media_changed(pp, flag);
990 disk_media_gone(struct disk *dp, int flag)
993 struct g_provider *pp;
997 pp = LIST_FIRST(&gp->provider);
999 KASSERT(LIST_NEXT(pp, provider) == NULL,
1000 ("geom %p has more than one provider", gp));
1001 g_media_gone(pp, flag);
1007 disk_resize(struct disk *dp, int flag)
1010 if (dp->d_destroyed || dp->d_geom == NULL)
1013 return (g_post_event(g_disk_resize, dp, flag, NULL));
1017 g_kern_disks(void *p, int flag __unused)
1025 g_topology_assert();
1026 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1027 sbuf_printf(sb, "%s%s", sp, gp->name);
1034 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1040 sb = sbuf_new_auto();
1041 dp = (struct disk *)arg1;
1042 sbuf_printf(sb, "%b", dp->d_flags,
1048 "\6DIRECTCOMPLETION"
1053 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1059 sysctl_disks(SYSCTL_HANDLER_ARGS)
1064 sb = sbuf_new_auto();
1065 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1066 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1071 SYSCTL_PROC(_kern, OID_AUTO, disks,
1072 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1073 sysctl_disks, "A", "names of available disks");