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 ((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;
277 KASSERT(dp != NULL && !dp->d_destroyed,
278 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
280 if (dp->d_ioctl == NULL)
282 error = 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;
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));
455 bp2 = g_clone_bio(bp);
461 if (g_disk_limit(dp, bp2)) {
462 off += bp2->bio_length;
465 * To avoid a race, we need to grab the next bio
466 * before we schedule this one. See "notes".
468 bp3 = g_clone_bio(bp);
470 bp->bio_error = ENOMEM;
472 bp2->bio_done = g_disk_done;
473 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
474 bp2->bio_bcount = bp2->bio_length;
476 mtx_lock(&sc->start_mtx);
477 devstat_start_transaction_bio(dp->d_devstat, bp2);
478 mtx_unlock(&sc->start_mtx);
486 g_disk_advance(dp, bp2, off);
490 /* Give the driver a chance to override */
491 if (dp->d_getattr != NULL) {
492 if (bp->bio_disk == NULL)
494 error = dp->d_getattr(bp);
499 if (g_handleattr_int(bp, "GEOM::candelete",
500 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
502 else if (g_handleattr_int(bp, "GEOM::fwsectors",
505 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
507 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
509 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
511 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
513 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
516 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
519 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
520 dp->d_hba_subvendor))
522 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
523 dp->d_hba_subdevice))
525 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
526 g_disk_kerneldump(bp, dp);
527 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
528 g_disk_setstate(bp, sc);
529 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
530 dp->d_rotation_rate))
532 else if (g_handleattr_str(bp, "GEOM::attachment",
539 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
541 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
547 if (bp->bio_cmd == BIO_ZONE) {
548 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
552 g_trace(G_T_BIO, "g_disk_zone(%s)",
555 bp2 = g_clone_bio(bp);
557 g_io_deliver(bp, ENOMEM);
560 bp2->bio_done = g_disk_done;
562 mtx_lock(&sc->start_mtx);
563 devstat_start_transaction_bio(dp->d_devstat, bp2);
564 mtx_unlock(&sc->start_mtx);
571 if (error != EJUSTRETURN)
572 g_io_deliver(bp, error);
577 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
581 struct g_disk_softc *sc;
586 if (sc == NULL || (dp = sc->dp) == NULL)
588 if (indent == NULL) {
589 sbuf_printf(sb, " hd %u", dp->d_fwheads);
590 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
594 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
595 indent, dp->d_fwheads);
596 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
597 indent, dp->d_fwsectors);
600 * "rotationrate" is a little complicated, because the value
601 * returned by the drive might not be the RPM; 0 and 1 are
602 * special cases, and there's also a valid range.
604 sbuf_printf(sb, "%s<rotationrate>", indent);
605 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
606 sbuf_cat(sb, "unknown"); /* don't report RPM. */
607 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
609 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
610 (dp->d_rotation_rate <= DISK_RR_MAX))
611 sbuf_printf(sb, "%u", dp->d_rotation_rate);
613 sbuf_cat(sb, "invalid");
614 sbuf_cat(sb, "</rotationrate>\n");
615 if (dp->d_getattr != NULL) {
616 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
619 bp->bio_attribute = "GEOM::ident";
620 bp->bio_length = DISK_IDENT_SIZE;
622 res = dp->d_getattr(bp);
623 sbuf_printf(sb, "%s<ident>", indent);
624 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
625 sbuf_cat(sb, "</ident>\n");
626 bp->bio_attribute = "GEOM::lunid";
627 bp->bio_length = DISK_IDENT_SIZE;
629 if (dp->d_getattr(bp) == 0) {
630 sbuf_printf(sb, "%s<lunid>", indent);
631 g_conf_cat_escaped(sb, buf);
632 sbuf_cat(sb, "</lunid>\n");
634 bp->bio_attribute = "GEOM::lunname";
635 bp->bio_length = DISK_IDENT_SIZE;
637 if (dp->d_getattr(bp) == 0) {
638 sbuf_printf(sb, "%s<lunname>", indent);
639 g_conf_cat_escaped(sb, buf);
640 sbuf_cat(sb, "</lunname>\n");
645 sbuf_printf(sb, "%s<ident>", indent);
646 g_conf_cat_escaped(sb, dp->d_ident);
647 sbuf_cat(sb, "</ident>\n");
649 sbuf_printf(sb, "%s<descr>", indent);
650 g_conf_cat_escaped(sb, dp->d_descr);
651 sbuf_cat(sb, "</descr>\n");
656 g_disk_resize(void *ptr, int flag)
660 struct g_provider *pp;
662 if (flag == EV_CANCEL)
669 if (dp->d_destroyed || gp == NULL)
672 LIST_FOREACH(pp, &gp->provider, provider) {
673 if (pp->sectorsize != 0 &&
674 pp->sectorsize != dp->d_sectorsize)
675 g_wither_provider(pp, ENXIO);
677 g_resize_provider(pp, dp->d_mediasize);
682 g_disk_create(void *arg, int flag)
685 struct g_provider *pp;
687 struct g_disk_softc *sc;
688 struct disk_alias *dap;
691 if (flag == EV_CANCEL)
696 mtx_pool_lock(mtxpool_sleep, dp);
697 dp->d_init_level = DISK_INIT_START;
700 * If the disk has already gone away, we can just stop here and
701 * call the user's callback to tell him we've cleaned things up.
703 if (dp->d_goneflag != 0) {
704 mtx_pool_unlock(mtxpool_sleep, dp);
705 if (dp->d_gone != NULL)
709 mtx_pool_unlock(mtxpool_sleep, dp);
711 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
712 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
713 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
715 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
717 LIST_FOREACH(dap, &dp->d_aliases, da_next) {
718 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit);
719 g_geom_add_alias(gp, tmpstr);
721 pp = g_new_providerf(gp, "%s", gp->name);
722 devstat_remove_entry(pp->stat);
724 dp->d_devstat->id = pp;
725 pp->mediasize = dp->d_mediasize;
726 pp->sectorsize = dp->d_sectorsize;
727 pp->stripeoffset = dp->d_stripeoffset;
728 pp->stripesize = dp->d_stripesize;
729 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
730 pp->flags |= G_PF_ACCEPT_UNMAPPED;
731 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
732 pp->flags |= G_PF_DIRECT_SEND;
733 pp->flags |= G_PF_DIRECT_RECEIVE;
735 printf("GEOM: new disk %s\n", gp->name);
736 sysctl_ctx_init(&sc->sysctl_ctx);
737 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
738 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
739 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
740 CTLFLAG_RD, 0, tmpstr);
741 if (sc->sysctl_tree != NULL) {
742 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
743 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
744 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
746 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
747 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
748 CTLTYPE_STRING | CTLFLAG_RD, dp, 0, g_disk_sysctl_flags,
749 "A", "Report disk flags");
753 g_error_provider(pp, 0);
755 mtx_pool_lock(mtxpool_sleep, dp);
756 dp->d_init_level = DISK_INIT_DONE;
759 * If the disk has gone away at this stage, start the withering
762 if (dp->d_goneflag != 0) {
763 mtx_pool_unlock(mtxpool_sleep, dp);
764 g_wither_provider(pp, ENXIO);
767 mtx_pool_unlock(mtxpool_sleep, dp);
772 * We get this callback after all of the consumers have gone away, and just
773 * before the provider is freed. If the disk driver provided a d_gone
774 * callback, let them know that it is okay to free resources -- they won't
775 * be getting any more accesses from GEOM.
778 g_disk_providergone(struct g_provider *pp)
781 struct g_disk_softc *sc;
783 sc = (struct g_disk_softc *)pp->private;
785 if (dp != NULL && dp->d_gone != NULL)
787 if (sc->sysctl_tree != NULL) {
788 sysctl_ctx_free(&sc->sysctl_ctx);
789 sc->sysctl_tree = NULL;
791 if (sc->led[0] != 0) {
792 led_set(sc->led, "0");
796 pp->geom->softc = NULL;
797 mtx_destroy(&sc->done_mtx);
798 mtx_destroy(&sc->start_mtx);
803 g_disk_destroy(void *ptr, int flag)
807 struct g_disk_softc *sc;
808 struct disk_alias *dap, *daptmp;
818 g_wither_geom(gp, ENXIO);
820 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
827 * We only allow printable characters in disk ident,
828 * the rest is converted to 'x<HH>'.
831 g_disk_ident_adjust(char *ident, size_t size)
833 char *p, tmp[4], newid[DISK_IDENT_SIZE];
836 for (p = ident; *p != '\0'; p++) {
841 snprintf(tmp, sizeof(tmp), "x%02hhx",
842 *(unsigned char *)p);
844 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
848 strlcpy(ident, newid, size);
856 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
857 LIST_INIT(&dp->d_aliases);
862 disk_create(struct disk *dp, int version)
865 if (version != DISK_VERSION) {
866 printf("WARNING: Attempt to add disk %s%d %s",
867 dp->d_name, dp->d_unit,
868 " using incompatible ABI version of disk(9)\n");
869 printf("WARNING: Ignoring disk %s%d\n",
870 dp->d_name, dp->d_unit);
873 if (dp->d_flags & DISKFLAG_RESERVED) {
874 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
875 dp->d_name, dp->d_unit);
876 printf("WARNING: Ignoring disk %s%d\n",
877 dp->d_name, dp->d_unit);
880 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
881 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
882 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
883 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
884 if (dp->d_devstat == NULL)
885 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
886 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
887 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
890 dp->d_init_level = DISK_INIT_NONE;
892 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
893 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
897 disk_destroy(struct disk *dp)
903 if (dp->d_devstat != NULL)
904 devstat_remove_entry(dp->d_devstat);
905 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
909 disk_add_alias(struct disk *dp, const char *name)
911 struct disk_alias *dap;
913 dap = (struct disk_alias *)g_malloc(
914 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
915 strcpy((char *)(dap + 1), name);
916 dap->da_alias = (const char *)(dap + 1);
917 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
921 disk_gone(struct disk *dp)
924 struct g_provider *pp;
926 mtx_pool_lock(mtxpool_sleep, dp);
929 * Second wither call makes no sense, plus we can not access the list
930 * of providers without topology lock after calling wither once.
932 if (dp->d_goneflag != 0) {
933 mtx_pool_unlock(mtxpool_sleep, dp);
940 * If we're still in the process of creating this disk (the
941 * g_disk_create() function is still queued, or is in
942 * progress), the init level will not yet be DISK_INIT_DONE.
944 * If that is the case, g_disk_create() will see d_goneflag
945 * and take care of cleaning things up.
947 * If the disk has already been created, we default to
948 * withering the provider as usual below.
950 * If the caller has not set a d_gone() callback, he will
951 * not be any worse off by returning here, because the geom
952 * has not been fully setup in any case.
954 if (dp->d_init_level < DISK_INIT_DONE) {
955 mtx_pool_unlock(mtxpool_sleep, dp);
958 mtx_pool_unlock(mtxpool_sleep, dp);
961 pp = LIST_FIRST(&gp->provider);
963 KASSERT(LIST_NEXT(pp, provider) == NULL,
964 ("geom %p has more than one provider", gp));
965 g_wither_provider(pp, ENXIO);
970 disk_attr_changed(struct disk *dp, const char *attr, int flag)
973 struct g_provider *pp;
974 char devnamebuf[128];
978 LIST_FOREACH(pp, &gp->provider, provider)
979 (void)g_attr_changed(pp, attr, flag);
980 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
982 devctl_notify("GEOM", "disk", attr, devnamebuf);
986 disk_media_changed(struct disk *dp, int flag)
989 struct g_provider *pp;
993 pp = LIST_FIRST(&gp->provider);
995 KASSERT(LIST_NEXT(pp, provider) == NULL,
996 ("geom %p has more than one provider", gp));
997 g_media_changed(pp, flag);
1003 disk_media_gone(struct disk *dp, int flag)
1006 struct g_provider *pp;
1010 pp = LIST_FIRST(&gp->provider);
1012 KASSERT(LIST_NEXT(pp, provider) == NULL,
1013 ("geom %p has more than one provider", gp));
1014 g_media_gone(pp, flag);
1020 disk_resize(struct disk *dp, int flag)
1023 if (dp->d_destroyed || dp->d_geom == NULL)
1026 return (g_post_event(g_disk_resize, dp, flag, NULL));
1030 g_kern_disks(void *p, int flag __unused)
1038 g_topology_assert();
1039 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1040 sbuf_printf(sb, "%s%s", sp, gp->name);
1047 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1053 sb = sbuf_new_auto();
1054 dp = (struct disk *)arg1;
1055 sbuf_printf(sb, "%b", dp->d_flags,
1061 "\6DIRECTCOMPLETION"
1066 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1072 sysctl_disks(SYSCTL_HANDLER_ARGS)
1077 sb = sbuf_new_auto();
1078 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1079 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1084 SYSCTL_PROC(_kern, OID_AUTO, disks,
1085 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1086 sysctl_disks, "A", "names of available disks");