2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/sysctl.h>
47 #include <sys/ctype.h>
48 #include <sys/fcntl.h>
49 #include <sys/malloc.h>
51 #include <sys/devicestat.h>
52 #include <machine/md_var.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>
67 struct sysctl_ctx_list sysctl_ctx;
68 struct sysctl_oid *sysctl_tree;
74 static g_access_t g_disk_access;
75 static g_start_t g_disk_start;
76 static g_ioctl_t g_disk_ioctl;
77 static g_dumpconf_t g_disk_dumpconf;
78 static g_provgone_t g_disk_providergone;
80 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
82 static struct g_class g_disk_class = {
83 .name = G_DISK_CLASS_NAME,
85 .start = g_disk_start,
86 .access = g_disk_access,
87 .ioctl = g_disk_ioctl,
88 .providergone = g_disk_providergone,
89 .dumpconf = g_disk_dumpconf,
92 SYSCTL_DECL(_kern_geom);
93 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0,
96 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
99 g_disk_access(struct g_provider *pp, int r, int w, int e)
102 struct g_disk_softc *sc;
105 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
109 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
111 * Allow decreasing access count even if disk is not
114 if (r <= 0 && w <= 0 && e <= 0)
122 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
123 if (dp->d_open != NULL) {
124 error = dp->d_open(dp);
125 if (bootverbose && error != 0)
126 printf("Opened disk %s -> %d\n",
131 pp->sectorsize = dp->d_sectorsize;
132 if (dp->d_maxsize == 0) {
133 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
134 dp->d_name, dp->d_unit);
135 dp->d_maxsize = DFLTPHYS;
137 if (dp->d_delmaxsize == 0) {
138 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
139 printf("WARNING: Disk drive %s%d has no "
140 "d_delmaxsize\n", dp->d_name, dp->d_unit);
142 dp->d_delmaxsize = dp->d_maxsize;
144 pp->stripeoffset = dp->d_stripeoffset;
145 pp->stripesize = dp->d_stripesize;
146 dp->d_flags |= DISKFLAG_OPEN;
148 * Do not invoke resize event when initial size was zero.
149 * Some disks report its size only after first opening.
151 if (pp->mediasize == 0)
152 pp->mediasize = dp->d_mediasize;
154 g_resize_provider(pp, dp->d_mediasize);
155 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
156 if (dp->d_close != NULL) {
157 error = dp->d_close(dp);
159 printf("Closed disk %s -> %d\n",
162 sc->state = G_STATE_ACTIVE;
164 led_set(sc->led, "0");
165 dp->d_flags &= ~DISKFLAG_OPEN;
171 g_disk_kerneldump(struct bio *bp, struct disk *dp)
173 struct g_kerneldump *gkd;
176 gkd = (struct g_kerneldump*)bp->bio_data;
177 gp = bp->bio_to->geom;
178 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
179 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
180 if (dp->d_dump == NULL) {
181 g_io_deliver(bp, ENODEV);
184 gkd->di.dumper = dp->d_dump;
186 gkd->di.blocksize = dp->d_sectorsize;
187 gkd->di.maxiosize = dp->d_maxsize;
188 gkd->di.mediaoffset = gkd->offset;
189 if ((gkd->offset + gkd->length) > dp->d_mediasize)
190 gkd->length = dp->d_mediasize - gkd->offset;
191 gkd->di.mediasize = gkd->length;
196 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
200 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
201 if (sc->led[0] != 0) {
206 case G_STATE_REBUILD:
216 led_set(sc->led, cmd);
222 g_disk_done(struct bio *bp)
226 struct g_disk_softc *sc;
228 /* See "notes" for why we need a mutex here */
229 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
230 bp2 = bp->bio_parent;
231 sc = bp2->bio_to->private;
232 bp->bio_completed = bp->bio_length - bp->bio_resid;
234 mtx_lock(&sc->done_mtx);
235 if (bp2->bio_error == 0)
236 bp2->bio_error = bp->bio_error;
237 bp2->bio_completed += bp->bio_completed;
239 switch (bp->bio_cmd) {
241 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
247 devstat_end_transaction_bio_bt(sc->dp->d_devstat, bp, &now);
253 if (bp2->bio_children == bp2->bio_inbed) {
254 mtx_unlock(&sc->done_mtx);
255 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
256 g_io_deliver(bp2, bp2->bio_error);
258 mtx_unlock(&sc->done_mtx);
263 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
266 struct g_disk_softc *sc;
272 if (dp->d_ioctl == NULL)
274 error = dp->d_ioctl(dp, cmd, data, fflag, td);
279 g_disk_maxsize(struct disk *dp, struct bio *bp)
281 if (bp->bio_cmd == BIO_DELETE)
282 return (dp->d_delmaxsize);
283 return (dp->d_maxsize);
287 g_disk_maxsegs(struct disk *dp, struct bio *bp)
289 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
293 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
296 bp->bio_offset += off;
297 bp->bio_length -= off;
299 if ((bp->bio_flags & BIO_VLIST) != 0) {
300 bus_dma_segment_t *seg, *end;
302 seg = (bus_dma_segment_t *)bp->bio_data;
303 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
304 off += bp->bio_ma_offset;
305 while (off >= seg->ds_len) {
306 KASSERT((seg != end),
307 ("vlist request runs off the end"));
311 bp->bio_ma_offset = off;
312 bp->bio_ma_n = end - seg;
313 bp->bio_data = (void *)seg;
314 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
315 bp->bio_ma += off / PAGE_SIZE;
316 bp->bio_ma_offset += off;
317 bp->bio_ma_offset %= PAGE_SIZE;
318 bp->bio_ma_n -= off / PAGE_SIZE;
325 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
326 off_t *plength, int *ppages)
328 uintptr_t seg_page_base;
329 uintptr_t seg_page_end;
337 if (length > seg->ds_len - offset)
338 length = seg->ds_len - offset;
340 seg_page_base = trunc_page(seg->ds_addr + offset);
341 seg_page_end = round_page(seg->ds_addr + offset + length);
342 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
344 if (seg_pages > *ppages) {
346 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
347 (seg->ds_addr + offset);
352 *ppages -= seg_pages;
356 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
358 bus_dma_segment_t *seg, *end;
363 seg = (bus_dma_segment_t *)bp->bio_data;
364 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
365 residual = bp->bio_length;
366 offset = bp->bio_ma_offset;
367 pages = g_disk_maxsegs(dp, bp);
368 while (residual != 0 && pages != 0) {
369 KASSERT((seg != end),
370 ("vlist limit runs off the end"));
371 g_disk_seg_limit(seg, &offset, &residual, &pages);
380 g_disk_limit(struct disk *dp, struct bio *bp)
382 bool limited = false;
385 maxsz = g_disk_maxsize(dp, bp);
388 * XXX: If we have a stripesize we should really use it here.
389 * Care should be taken in the delete case if this is done
390 * as deletes can be very sensitive to size given how they
393 if (bp->bio_length > maxsz) {
394 bp->bio_length = maxsz;
398 if ((bp->bio_flags & BIO_VLIST) != 0) {
399 bus_dma_segment_t *firstseg, *endseg;
402 firstseg = (bus_dma_segment_t*)bp->bio_data;
403 residual = g_disk_vlist_limit(dp, bp, &endseg);
405 bp->bio_ma_n = endseg - firstseg;
406 bp->bio_length -= residual;
409 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
411 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
418 g_disk_start(struct bio *bp)
420 struct bio *bp2, *bp3;
422 struct g_disk_softc *sc;
426 biotrack(bp, __func__);
428 sc = bp->bio_to->private;
429 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
430 g_io_deliver(bp, ENXIO);
434 switch(bp->bio_cmd) {
436 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
443 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
444 (bp->bio_flags & BIO_UNMAPPED) == 0,
445 ("unmapped bio not supported by disk %s", dp->d_name));
448 bp2 = g_clone_bio(bp);
454 if (g_disk_limit(dp, bp2)) {
455 off += bp2->bio_length;
458 * To avoid a race, we need to grab the next bio
459 * before we schedule this one. See "notes".
461 bp3 = g_clone_bio(bp);
463 bp->bio_error = ENOMEM;
465 bp2->bio_done = g_disk_done;
466 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
467 bp2->bio_bcount = bp2->bio_length;
469 mtx_lock(&sc->start_mtx);
470 devstat_start_transaction_bio(dp->d_devstat, bp2);
471 mtx_unlock(&sc->start_mtx);
479 g_disk_advance(dp, bp2, off);
483 /* Give the driver a chance to override */
484 if (dp->d_getattr != NULL) {
485 if (bp->bio_disk == NULL)
487 error = dp->d_getattr(bp);
492 if (g_handleattr_int(bp, "GEOM::candelete",
493 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
495 else if (g_handleattr_int(bp, "GEOM::fwsectors",
498 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
500 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
502 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
504 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
506 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
509 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
512 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
513 dp->d_hba_subvendor))
515 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
516 dp->d_hba_subdevice))
518 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
519 g_disk_kerneldump(bp, dp);
520 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
521 g_disk_setstate(bp, sc);
522 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
523 dp->d_rotation_rate))
529 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
531 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
537 if (bp->bio_cmd == BIO_ZONE) {
538 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
542 g_trace(G_T_BIO, "g_disk_zone(%s)",
545 bp2 = g_clone_bio(bp);
547 g_io_deliver(bp, ENOMEM);
550 bp2->bio_done = g_disk_done;
552 mtx_lock(&sc->start_mtx);
553 devstat_start_transaction_bio(dp->d_devstat, bp2);
554 mtx_unlock(&sc->start_mtx);
561 if (error != EJUSTRETURN)
562 g_io_deliver(bp, error);
567 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
571 struct g_disk_softc *sc;
576 if (sc == NULL || (dp = sc->dp) == NULL)
578 if (indent == NULL) {
579 sbuf_printf(sb, " hd %u", dp->d_fwheads);
580 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
584 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
585 indent, dp->d_fwheads);
586 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
587 indent, dp->d_fwsectors);
590 * "rotationrate" is a little complicated, because the value
591 * returned by the drive might not be the RPM; 0 and 1 are
592 * special cases, and there's also a valid range.
594 sbuf_printf(sb, "%s<rotationrate>", indent);
595 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
596 sbuf_printf(sb, "unknown"); /* don't report RPM. */
597 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
598 sbuf_printf(sb, "0");
599 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
600 (dp->d_rotation_rate <= DISK_RR_MAX))
601 sbuf_printf(sb, "%u", dp->d_rotation_rate);
603 sbuf_printf(sb, "invalid");
604 sbuf_printf(sb, "</rotationrate>\n");
605 if (dp->d_getattr != NULL) {
606 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
609 bp->bio_attribute = "GEOM::ident";
610 bp->bio_length = DISK_IDENT_SIZE;
612 res = dp->d_getattr(bp);
613 sbuf_printf(sb, "%s<ident>", indent);
614 g_conf_printf_escaped(sb, "%s",
615 res == 0 ? buf: dp->d_ident);
616 sbuf_printf(sb, "</ident>\n");
617 bp->bio_attribute = "GEOM::lunid";
618 bp->bio_length = DISK_IDENT_SIZE;
620 if (dp->d_getattr(bp) == 0) {
621 sbuf_printf(sb, "%s<lunid>", indent);
622 g_conf_printf_escaped(sb, "%s", buf);
623 sbuf_printf(sb, "</lunid>\n");
625 bp->bio_attribute = "GEOM::lunname";
626 bp->bio_length = DISK_IDENT_SIZE;
628 if (dp->d_getattr(bp) == 0) {
629 sbuf_printf(sb, "%s<lunname>", indent);
630 g_conf_printf_escaped(sb, "%s", buf);
631 sbuf_printf(sb, "</lunname>\n");
636 sbuf_printf(sb, "%s<ident>", indent);
637 g_conf_printf_escaped(sb, "%s", dp->d_ident);
638 sbuf_printf(sb, "</ident>\n");
640 sbuf_printf(sb, "%s<descr>", indent);
641 g_conf_printf_escaped(sb, "%s", dp->d_descr);
642 sbuf_printf(sb, "</descr>\n");
647 g_disk_resize(void *ptr, int flag)
651 struct g_provider *pp;
653 if (flag == EV_CANCEL)
660 if (dp->d_destroyed || gp == NULL)
663 LIST_FOREACH(pp, &gp->provider, provider) {
664 if (pp->sectorsize != 0 &&
665 pp->sectorsize != dp->d_sectorsize)
666 g_wither_provider(pp, ENXIO);
668 g_resize_provider(pp, dp->d_mediasize);
673 g_disk_create(void *arg, int flag)
676 struct g_provider *pp;
678 struct g_disk_softc *sc;
679 struct disk_alias *dap;
682 if (flag == EV_CANCEL)
687 mtx_pool_lock(mtxpool_sleep, dp);
688 dp->d_init_level = DISK_INIT_START;
691 * If the disk has already gone away, we can just stop here and
692 * call the user's callback to tell him we've cleaned things up.
694 if (dp->d_goneflag != 0) {
695 mtx_pool_unlock(mtxpool_sleep, dp);
696 if (dp->d_gone != NULL)
700 mtx_pool_unlock(mtxpool_sleep, dp);
702 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
703 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
704 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
706 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
708 LIST_FOREACH(dap, &dp->d_aliases, da_next) {
709 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit);
710 g_geom_add_alias(gp, tmpstr);
712 pp = g_new_providerf(gp, "%s", gp->name);
713 devstat_remove_entry(pp->stat);
715 dp->d_devstat->id = pp;
716 pp->mediasize = dp->d_mediasize;
717 pp->sectorsize = dp->d_sectorsize;
718 pp->stripeoffset = dp->d_stripeoffset;
719 pp->stripesize = dp->d_stripesize;
720 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
721 pp->flags |= G_PF_ACCEPT_UNMAPPED;
722 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
723 pp->flags |= G_PF_DIRECT_SEND;
724 pp->flags |= G_PF_DIRECT_RECEIVE;
726 printf("GEOM: new disk %s\n", gp->name);
727 sysctl_ctx_init(&sc->sysctl_ctx);
728 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
729 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
730 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
731 CTLFLAG_RD, 0, tmpstr);
732 if (sc->sysctl_tree != NULL) {
733 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
734 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
735 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
737 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
738 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
739 CTLTYPE_STRING | CTLFLAG_RD, dp, 0, g_disk_sysctl_flags,
740 "A", "Report disk flags");
744 g_error_provider(pp, 0);
746 mtx_pool_lock(mtxpool_sleep, dp);
747 dp->d_init_level = DISK_INIT_DONE;
750 * If the disk has gone away at this stage, start the withering
753 if (dp->d_goneflag != 0) {
754 mtx_pool_unlock(mtxpool_sleep, dp);
755 g_wither_provider(pp, ENXIO);
758 mtx_pool_unlock(mtxpool_sleep, dp);
763 * We get this callback after all of the consumers have gone away, and just
764 * before the provider is freed. If the disk driver provided a d_gone
765 * callback, let them know that it is okay to free resources -- they won't
766 * be getting any more accesses from GEOM.
769 g_disk_providergone(struct g_provider *pp)
772 struct g_disk_softc *sc;
774 sc = (struct g_disk_softc *)pp->private;
776 if (dp != NULL && dp->d_gone != NULL)
778 if (sc->sysctl_tree != NULL) {
779 sysctl_ctx_free(&sc->sysctl_ctx);
780 sc->sysctl_tree = NULL;
782 if (sc->led[0] != 0) {
783 led_set(sc->led, "0");
787 pp->geom->softc = NULL;
788 mtx_destroy(&sc->done_mtx);
789 mtx_destroy(&sc->start_mtx);
794 g_disk_destroy(void *ptr, int flag)
798 struct g_disk_softc *sc;
799 struct disk_alias *dap, *daptmp;
809 g_wither_geom(gp, ENXIO);
811 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
818 * We only allow printable characters in disk ident,
819 * the rest is converted to 'x<HH>'.
822 g_disk_ident_adjust(char *ident, size_t size)
824 char *p, tmp[4], newid[DISK_IDENT_SIZE];
827 for (p = ident; *p != '\0'; p++) {
832 snprintf(tmp, sizeof(tmp), "x%02hhx",
833 *(unsigned char *)p);
835 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
839 strlcpy(ident, newid, size);
847 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
848 LIST_INIT(&dp->d_aliases);
853 disk_create(struct disk *dp, int version)
856 if (version != DISK_VERSION) {
857 printf("WARNING: Attempt to add disk %s%d %s",
858 dp->d_name, dp->d_unit,
859 " using incompatible ABI version of disk(9)\n");
860 printf("WARNING: Ignoring disk %s%d\n",
861 dp->d_name, dp->d_unit);
864 if (dp->d_flags & DISKFLAG_RESERVED) {
865 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
866 dp->d_name, dp->d_unit);
867 printf("WARNING: Ignoring disk %s%d\n",
868 dp->d_name, dp->d_unit);
871 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
872 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
873 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
874 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
875 if (dp->d_devstat == NULL)
876 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
877 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
878 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
881 dp->d_init_level = DISK_INIT_NONE;
883 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
884 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
888 disk_destroy(struct disk *dp)
893 if (dp->d_devstat != NULL)
894 devstat_remove_entry(dp->d_devstat);
895 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
899 disk_add_alias(struct disk *dp, const char *name)
901 struct disk_alias *dap;
903 dap = (struct disk_alias *)g_malloc(
904 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
905 strcpy((char *)(dap + 1), name);
906 dap->da_alias = (const char *)(dap + 1);
907 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
911 disk_gone(struct disk *dp)
914 struct g_provider *pp;
916 mtx_pool_lock(mtxpool_sleep, dp);
920 * If we're still in the process of creating this disk (the
921 * g_disk_create() function is still queued, or is in
922 * progress), the init level will not yet be DISK_INIT_DONE.
924 * If that is the case, g_disk_create() will see d_goneflag
925 * and take care of cleaning things up.
927 * If the disk has already been created, we default to
928 * withering the provider as usual below.
930 * If the caller has not set a d_gone() callback, he will
931 * not be any worse off by returning here, because the geom
932 * has not been fully setup in any case.
934 if (dp->d_init_level < DISK_INIT_DONE) {
935 mtx_pool_unlock(mtxpool_sleep, dp);
938 mtx_pool_unlock(mtxpool_sleep, dp);
942 pp = LIST_FIRST(&gp->provider);
944 KASSERT(LIST_NEXT(pp, provider) == NULL,
945 ("geom %p has more than one provider", gp));
946 g_wither_provider(pp, ENXIO);
952 disk_attr_changed(struct disk *dp, const char *attr, int flag)
955 struct g_provider *pp;
956 char devnamebuf[128];
960 LIST_FOREACH(pp, &gp->provider, provider)
961 (void)g_attr_changed(pp, attr, flag);
962 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
964 devctl_notify("GEOM", "disk", attr, devnamebuf);
968 disk_media_changed(struct disk *dp, int flag)
971 struct g_provider *pp;
975 pp = LIST_FIRST(&gp->provider);
977 KASSERT(LIST_NEXT(pp, provider) == NULL,
978 ("geom %p has more than one provider", gp));
979 g_media_changed(pp, flag);
985 disk_media_gone(struct disk *dp, int flag)
988 struct g_provider *pp;
992 pp = LIST_FIRST(&gp->provider);
994 KASSERT(LIST_NEXT(pp, provider) == NULL,
995 ("geom %p has more than one provider", gp));
996 g_media_gone(pp, flag);
1002 disk_resize(struct disk *dp, int flag)
1005 if (dp->d_destroyed || dp->d_geom == NULL)
1008 return (g_post_event(g_disk_resize, dp, flag, NULL));
1012 g_kern_disks(void *p, int flag __unused)
1020 g_topology_assert();
1021 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1022 sbuf_printf(sb, "%s%s", sp, gp->name);
1029 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1035 sb = sbuf_new_auto();
1036 dp = (struct disk *)arg1;
1037 sbuf_printf(sb, "%b", dp->d_flags,
1043 "\6DIRECTCOMPLETION"
1047 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1053 sysctl_disks(SYSCTL_HANDLER_ARGS)
1058 sb = sbuf_new_auto();
1059 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1060 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1065 SYSCTL_PROC(_kern, OID_AUTO, disks,
1066 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1067 sysctl_disks, "A", "names of available disks");