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>
48 #include <sys/ctype.h>
49 #include <sys/devctl.h>
50 #include <sys/fcntl.h>
51 #include <sys/malloc.h>
54 #include <sys/devicestat.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>
68 struct devstat *d_devstat;
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 | CTLFLAG_MPSAFE, 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 sc = bp->bio_caller1;
236 bp2 = bp->bio_parent;
238 mtx_lock(&sc->done_mtx);
239 if (bp2->bio_error == 0)
240 bp2->bio_error = bp->bio_error;
241 bp2->bio_completed += bp->bio_length - bp->bio_resid;
243 if (bp->bio_cmd == BIO_READ)
244 kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done");
246 switch (bp->bio_cmd) {
248 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
254 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
260 if (bp2->bio_children == bp2->bio_inbed) {
261 mtx_unlock(&sc->done_mtx);
262 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
263 g_io_deliver(bp2, bp2->bio_error);
265 mtx_unlock(&sc->done_mtx);
270 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
273 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 return (dp->d_ioctl(dp, cmd, data, fflag, td));
286 g_disk_maxsize(struct disk *dp, struct bio *bp)
288 if (bp->bio_cmd == BIO_DELETE)
289 return (dp->d_delmaxsize);
290 return (dp->d_maxsize);
294 g_disk_maxsegs(struct disk *dp, struct bio *bp)
296 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
300 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
303 bp->bio_offset += off;
304 bp->bio_length -= off;
306 if ((bp->bio_flags & BIO_VLIST) != 0) {
307 bus_dma_segment_t *seg, *end;
309 seg = (bus_dma_segment_t *)bp->bio_data;
310 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
311 off += bp->bio_ma_offset;
312 while (off >= seg->ds_len) {
313 KASSERT((seg != end),
314 ("vlist request runs off the end"));
318 bp->bio_ma_offset = off;
319 bp->bio_ma_n = end - seg;
320 bp->bio_data = (void *)seg;
321 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
322 bp->bio_ma += off / PAGE_SIZE;
323 bp->bio_ma_offset += off;
324 bp->bio_ma_offset %= PAGE_SIZE;
325 bp->bio_ma_n -= off / PAGE_SIZE;
332 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
333 off_t *plength, int *ppages)
335 uintptr_t seg_page_base;
336 uintptr_t seg_page_end;
344 if (length > seg->ds_len - offset)
345 length = seg->ds_len - offset;
347 seg_page_base = trunc_page(seg->ds_addr + offset);
348 seg_page_end = round_page(seg->ds_addr + offset + length);
349 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
351 if (seg_pages > *ppages) {
353 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
354 (seg->ds_addr + offset);
359 *ppages -= seg_pages;
363 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
365 bus_dma_segment_t *seg, *end __diagused;
370 seg = (bus_dma_segment_t *)bp->bio_data;
371 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
372 residual = bp->bio_length;
373 offset = bp->bio_ma_offset;
374 pages = g_disk_maxsegs(dp, bp);
375 while (residual != 0 && pages != 0) {
376 KASSERT((seg != end),
377 ("vlist limit runs off the end"));
378 g_disk_seg_limit(seg, &offset, &residual, &pages);
387 g_disk_limit(struct disk *dp, struct bio *bp)
389 bool limited = false;
392 maxsz = g_disk_maxsize(dp, bp);
395 * XXX: If we have a stripesize we should really use it here.
396 * Care should be taken in the delete case if this is done
397 * as deletes can be very sensitive to size given how they
400 if (bp->bio_length > maxsz) {
401 bp->bio_length = maxsz;
405 if ((bp->bio_flags & BIO_VLIST) != 0) {
406 bus_dma_segment_t *firstseg, *endseg;
409 firstseg = (bus_dma_segment_t*)bp->bio_data;
410 residual = g_disk_vlist_limit(dp, bp, &endseg);
412 bp->bio_ma_n = endseg - firstseg;
413 bp->bio_length -= residual;
416 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
418 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
425 g_disk_start(struct bio *bp)
427 struct bio *bp2, *bp3;
429 struct g_disk_softc *sc;
433 biotrack(bp, __func__);
435 sc = bp->bio_to->private;
437 KASSERT(dp != NULL && !dp->d_destroyed,
438 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
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));
453 if (bp->bio_cmd == BIO_WRITE)
454 kmsan_check_bio(bp, "g_disk_start");
458 bp2 = g_clone_bio(bp);
464 if (g_disk_limit(dp, bp2)) {
465 off += bp2->bio_length;
468 * To avoid a race, we need to grab the next bio
469 * before we schedule this one. See "notes".
471 bp3 = g_clone_bio(bp);
473 bp->bio_error = ENOMEM;
475 bp2->bio_done = g_disk_done;
476 bp2->bio_caller1 = sc;
477 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
478 bp2->bio_bcount = bp2->bio_length;
480 devstat_start_transaction_bio(dp->d_devstat, bp2);
488 g_disk_advance(dp, bp2, off);
492 /* Give the driver a chance to override */
493 if (dp->d_getattr != NULL) {
494 if (bp->bio_disk == NULL)
496 error = dp->d_getattr(bp);
501 if (g_handleattr_int(bp, "GEOM::candelete",
502 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
504 else if (g_handleattr_int(bp, "GEOM::fwsectors",
507 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
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;
561 bp2->bio_caller1 = sc;
563 devstat_start_transaction_bio(dp->d_devstat, bp2);
567 bp2 = g_clone_bio(bp);
569 g_io_deliver(bp, ENOMEM);
572 bp2->bio_done = g_disk_done;
573 bp2->bio_caller1 = sc;
581 if (error != EJUSTRETURN)
582 g_io_deliver(bp, error);
587 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
591 struct g_disk_softc *sc;
596 if (sc == NULL || (dp = sc->dp) == NULL)
598 if (indent == NULL) {
599 sbuf_printf(sb, " hd %u", dp->d_fwheads);
600 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
604 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
605 indent, dp->d_fwheads);
606 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
607 indent, dp->d_fwsectors);
610 * "rotationrate" is a little complicated, because the value
611 * returned by the drive might not be the RPM; 0 and 1 are
612 * special cases, and there's also a valid range.
614 sbuf_printf(sb, "%s<rotationrate>", indent);
615 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
616 sbuf_cat(sb, "unknown"); /* don't report RPM. */
617 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
619 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
620 (dp->d_rotation_rate <= DISK_RR_MAX))
621 sbuf_printf(sb, "%u", dp->d_rotation_rate);
623 sbuf_cat(sb, "invalid");
624 sbuf_cat(sb, "</rotationrate>\n");
625 if (dp->d_getattr != NULL) {
626 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
629 bp->bio_attribute = "GEOM::ident";
630 bp->bio_length = DISK_IDENT_SIZE;
632 res = dp->d_getattr(bp);
633 sbuf_printf(sb, "%s<ident>", indent);
634 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
635 sbuf_cat(sb, "</ident>\n");
636 bp->bio_attribute = "GEOM::lunid";
637 bp->bio_length = DISK_IDENT_SIZE;
639 if (dp->d_getattr(bp) == 0) {
640 sbuf_printf(sb, "%s<lunid>", indent);
641 g_conf_cat_escaped(sb, buf);
642 sbuf_cat(sb, "</lunid>\n");
644 bp->bio_attribute = "GEOM::lunname";
645 bp->bio_length = DISK_IDENT_SIZE;
647 if (dp->d_getattr(bp) == 0) {
648 sbuf_printf(sb, "%s<lunname>", indent);
649 g_conf_cat_escaped(sb, buf);
650 sbuf_cat(sb, "</lunname>\n");
655 sbuf_printf(sb, "%s<ident>", indent);
656 g_conf_cat_escaped(sb, dp->d_ident);
657 sbuf_cat(sb, "</ident>\n");
659 sbuf_printf(sb, "%s<descr>", indent);
660 g_conf_cat_escaped(sb, dp->d_descr);
661 sbuf_cat(sb, "</descr>\n");
666 g_disk_resize(void *ptr, int flag)
670 struct g_provider *pp;
672 if (flag == EV_CANCEL)
679 if (dp->d_destroyed || gp == NULL)
682 LIST_FOREACH(pp, &gp->provider, provider) {
683 if (pp->sectorsize != 0 &&
684 pp->sectorsize != dp->d_sectorsize)
685 g_wither_provider(pp, ENXIO);
687 g_resize_provider(pp, dp->d_mediasize);
692 g_disk_create(void *arg, int flag)
695 struct g_provider *pp;
697 struct g_disk_softc *sc;
698 struct disk_alias *dap;
701 if (flag == EV_CANCEL)
706 mtx_pool_lock(mtxpool_sleep, dp);
707 dp->d_init_level = DISK_INIT_START;
710 * If the disk has already gone away, we can just stop here and
711 * call the user's callback to tell him we've cleaned things up.
713 if (dp->d_goneflag != 0) {
714 mtx_pool_unlock(mtxpool_sleep, dp);
715 if (dp->d_gone != NULL)
719 mtx_pool_unlock(mtxpool_sleep, dp);
721 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
722 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
724 if (dp->d_devstat == NULL) {
725 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
726 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
727 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
729 sc->d_devstat = dp->d_devstat;
730 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
732 pp = g_new_providerf(gp, "%s", gp->name);
733 LIST_FOREACH(dap, &dp->d_aliases, da_next)
734 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit);
735 devstat_remove_entry(pp->stat);
737 dp->d_devstat->id = pp;
738 pp->mediasize = dp->d_mediasize;
739 pp->sectorsize = dp->d_sectorsize;
740 pp->stripeoffset = dp->d_stripeoffset;
741 pp->stripesize = dp->d_stripesize;
742 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
743 pp->flags |= G_PF_ACCEPT_UNMAPPED;
744 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
745 pp->flags |= G_PF_DIRECT_SEND;
746 pp->flags |= G_PF_DIRECT_RECEIVE;
748 printf("GEOM: new disk %s\n", gp->name);
749 sysctl_ctx_init(&sc->sysctl_ctx);
750 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
751 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
752 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
753 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr);
754 if (sc->sysctl_tree != NULL) {
755 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
756 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
757 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
759 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
760 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
761 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0,
762 g_disk_sysctl_flags, "A", "Report disk flags");
766 g_error_provider(pp, 0);
768 mtx_pool_lock(mtxpool_sleep, dp);
769 dp->d_init_level = DISK_INIT_DONE;
772 * If the disk has gone away at this stage, start the withering
775 if (dp->d_goneflag != 0) {
776 mtx_pool_unlock(mtxpool_sleep, dp);
777 g_wither_provider(pp, ENXIO);
780 mtx_pool_unlock(mtxpool_sleep, dp);
785 * We get this callback after all of the consumers have gone away, and just
786 * before the provider is freed. If the disk driver provided a d_gone
787 * callback, let them know that it is okay to free resources -- they won't
788 * be getting any more accesses from GEOM.
791 g_disk_providergone(struct g_provider *pp)
794 struct g_disk_softc *sc;
796 sc = (struct g_disk_softc *)pp->private;
798 if (dp != NULL && dp->d_gone != NULL)
800 if (sc->sysctl_tree != NULL) {
801 sysctl_ctx_free(&sc->sysctl_ctx);
802 sc->sysctl_tree = NULL;
804 if (sc->led[0] != 0) {
805 led_set(sc->led, "0");
809 pp->geom->softc = NULL;
810 mtx_destroy(&sc->done_mtx);
815 g_disk_destroy(void *ptr, int flag)
819 struct g_disk_softc *sc;
820 struct disk_alias *dap, *daptmp;
830 g_wither_geom(gp, ENXIO);
832 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
839 * We only allow printable characters in disk ident,
840 * the rest is converted to 'x<HH>'.
843 g_disk_ident_adjust(char *ident, size_t size)
845 char *p, tmp[4], newid[DISK_IDENT_SIZE];
848 for (p = ident; *p != '\0'; p++) {
853 snprintf(tmp, sizeof(tmp), "x%02hhx",
854 *(unsigned char *)p);
856 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
860 strlcpy(ident, newid, size);
868 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
869 LIST_INIT(&dp->d_aliases);
870 dp->d_init_level = DISK_INIT_NONE;
871 dp->d_cevent = g_alloc_event(M_WAITOK);
872 dp->d_devent = g_alloc_event(M_WAITOK);
877 disk_create(struct disk *dp, int version)
880 if (version != DISK_VERSION) {
881 printf("WARNING: Attempt to add disk %s%d %s",
882 dp->d_name, dp->d_unit,
883 " using incompatible ABI version of disk(9)\n");
884 printf("WARNING: Ignoring disk %s%d\n",
885 dp->d_name, dp->d_unit);
888 if (dp->d_flags & DISKFLAG_RESERVED) {
889 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
890 dp->d_name, dp->d_unit);
891 printf("WARNING: Ignoring disk %s%d\n",
892 dp->d_name, dp->d_unit);
895 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
896 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
897 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
898 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
899 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
901 dp->d_init_level = DISK_INIT_CREATE;
903 KASSERT(dp->d_cevent != NULL,
904 ("Disk create for %p with event NULL", dp));
905 g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL);
909 disk_destroy(struct disk *dp)
911 struct disk_alias *dap, *daptmp;
913 /* If disk_create() was never called, just free the resources. */
914 if (dp->d_init_level < DISK_INIT_CREATE) {
915 if (dp->d_devstat != NULL)
916 devstat_remove_entry(dp->d_devstat);
917 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
919 g_free(dp->d_cevent);
920 g_free(dp->d_devent);
925 KASSERT(dp->d_devent != NULL,
926 ("Disk destroy for %p with event NULL", dp));
930 if (dp->d_devstat != NULL)
931 devstat_remove_entry(dp->d_devstat);
932 g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL);
936 disk_add_alias(struct disk *dp, const char *name)
938 struct disk_alias *dap;
940 dap = (struct disk_alias *)g_malloc(
941 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
942 strcpy((char *)(dap + 1), name);
943 dap->da_alias = (const char *)(dap + 1);
944 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
948 disk_gone(struct disk *dp)
951 struct g_provider *pp;
953 mtx_pool_lock(mtxpool_sleep, dp);
956 * Second wither call makes no sense, plus we can not access the list
957 * of providers without topology lock after calling wither once.
959 if (dp->d_goneflag != 0) {
960 mtx_pool_unlock(mtxpool_sleep, dp);
967 * If we're still in the process of creating this disk (the
968 * g_disk_create() function is still queued, or is in
969 * progress), the init level will not yet be DISK_INIT_DONE.
971 * If that is the case, g_disk_create() will see d_goneflag
972 * and take care of cleaning things up.
974 * If the disk has already been created, we default to
975 * withering the provider as usual below.
977 * If the caller has not set a d_gone() callback, he will
978 * not be any worse off by returning here, because the geom
979 * has not been fully setup in any case.
981 if (dp->d_init_level < DISK_INIT_DONE) {
982 mtx_pool_unlock(mtxpool_sleep, dp);
985 mtx_pool_unlock(mtxpool_sleep, dp);
988 pp = LIST_FIRST(&gp->provider);
990 KASSERT(LIST_NEXT(pp, provider) == NULL,
991 ("geom %p has more than one provider", gp));
992 g_wither_provider(pp, ENXIO);
997 disk_attr_changed(struct disk *dp, const char *attr, int flag)
999 struct g_geom *gp = dp->d_geom;
1000 struct g_provider *pp;
1001 char devnamebuf[128];
1005 LIST_FOREACH(pp, &gp->provider, provider)
1006 (void)g_attr_changed(pp, attr, flag);
1007 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
1009 devctl_notify("GEOM", "disk", attr, devnamebuf);
1013 disk_media_changed(struct disk *dp, int flag)
1015 struct g_geom *gp = dp->d_geom;
1016 struct g_provider *pp;
1020 pp = LIST_FIRST(&gp->provider);
1022 KASSERT(LIST_NEXT(pp, provider) == NULL,
1023 ("geom %p has more than one provider", gp));
1024 g_media_changed(pp, flag);
1029 disk_media_gone(struct disk *dp, int flag)
1031 struct g_geom *gp = dp->d_geom;
1032 struct g_provider *pp;
1036 pp = LIST_FIRST(&gp->provider);
1038 KASSERT(LIST_NEXT(pp, provider) == NULL,
1039 ("geom %p has more than one provider", gp));
1040 g_media_gone(pp, flag);
1045 disk_resize(struct disk *dp, int flag)
1048 if (dp->d_destroyed || dp->d_geom == NULL)
1051 return (g_post_event(g_disk_resize, dp, flag, NULL));
1055 g_kern_disks(void *p, int flag __unused)
1063 g_topology_assert();
1064 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1065 sbuf_printf(sb, "%s%s", sp, gp->name);
1072 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1078 sb = sbuf_new_auto();
1079 dp = (struct disk *)arg1;
1080 sbuf_printf(sb, "%b", dp->d_flags,
1086 "\6DIRECTCOMPLETION"
1091 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1097 sysctl_disks(SYSCTL_HANDLER_ARGS)
1102 sb = sbuf_new_auto();
1103 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1104 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1109 SYSCTL_PROC(_kern, OID_AUTO, disks,
1110 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1111 sysctl_disks, "A", "names of available disks");