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>
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 switch (bp->bio_cmd) {
245 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
251 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
257 if (bp2->bio_children == bp2->bio_inbed) {
258 mtx_unlock(&sc->done_mtx);
259 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
260 g_io_deliver(bp2, bp2->bio_error);
262 mtx_unlock(&sc->done_mtx);
267 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
270 struct g_disk_softc *sc;
274 KASSERT(dp != NULL && !dp->d_destroyed,
275 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
277 if (dp->d_ioctl == NULL)
279 return (dp->d_ioctl(dp, cmd, data, fflag, td));
283 g_disk_maxsize(struct disk *dp, struct bio *bp)
285 if (bp->bio_cmd == BIO_DELETE)
286 return (dp->d_delmaxsize);
287 return (dp->d_maxsize);
291 g_disk_maxsegs(struct disk *dp, struct bio *bp)
293 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
297 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
300 bp->bio_offset += off;
301 bp->bio_length -= off;
303 if ((bp->bio_flags & BIO_VLIST) != 0) {
304 bus_dma_segment_t *seg, *end;
306 seg = (bus_dma_segment_t *)bp->bio_data;
307 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
308 off += bp->bio_ma_offset;
309 while (off >= seg->ds_len) {
310 KASSERT((seg != end),
311 ("vlist request runs off the end"));
315 bp->bio_ma_offset = off;
316 bp->bio_ma_n = end - seg;
317 bp->bio_data = (void *)seg;
318 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
319 bp->bio_ma += off / PAGE_SIZE;
320 bp->bio_ma_offset += off;
321 bp->bio_ma_offset %= PAGE_SIZE;
322 bp->bio_ma_n -= off / PAGE_SIZE;
329 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
330 off_t *plength, int *ppages)
332 uintptr_t seg_page_base;
333 uintptr_t seg_page_end;
341 if (length > seg->ds_len - offset)
342 length = seg->ds_len - offset;
344 seg_page_base = trunc_page(seg->ds_addr + offset);
345 seg_page_end = round_page(seg->ds_addr + offset + length);
346 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
348 if (seg_pages > *ppages) {
350 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
351 (seg->ds_addr + offset);
356 *ppages -= seg_pages;
360 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
362 bus_dma_segment_t *seg, *end;
367 seg = (bus_dma_segment_t *)bp->bio_data;
368 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
369 residual = bp->bio_length;
370 offset = bp->bio_ma_offset;
371 pages = g_disk_maxsegs(dp, bp);
372 while (residual != 0 && pages != 0) {
373 KASSERT((seg != end),
374 ("vlist limit runs off the end"));
375 g_disk_seg_limit(seg, &offset, &residual, &pages);
384 g_disk_limit(struct disk *dp, struct bio *bp)
386 bool limited = false;
389 maxsz = g_disk_maxsize(dp, bp);
392 * XXX: If we have a stripesize we should really use it here.
393 * Care should be taken in the delete case if this is done
394 * as deletes can be very sensitive to size given how they
397 if (bp->bio_length > maxsz) {
398 bp->bio_length = maxsz;
402 if ((bp->bio_flags & BIO_VLIST) != 0) {
403 bus_dma_segment_t *firstseg, *endseg;
406 firstseg = (bus_dma_segment_t*)bp->bio_data;
407 residual = g_disk_vlist_limit(dp, bp, &endseg);
409 bp->bio_ma_n = endseg - firstseg;
410 bp->bio_length -= residual;
413 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
415 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
422 g_disk_start(struct bio *bp)
424 struct bio *bp2, *bp3;
426 struct g_disk_softc *sc;
430 biotrack(bp, __func__);
432 sc = bp->bio_to->private;
434 KASSERT(dp != NULL && !dp->d_destroyed,
435 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
437 switch(bp->bio_cmd) {
439 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
446 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
447 (bp->bio_flags & BIO_UNMAPPED) == 0,
448 ("unmapped bio not supported by disk %s", dp->d_name));
451 bp2 = g_clone_bio(bp);
457 if (g_disk_limit(dp, bp2)) {
458 off += bp2->bio_length;
461 * To avoid a race, we need to grab the next bio
462 * before we schedule this one. See "notes".
464 bp3 = g_clone_bio(bp);
466 bp->bio_error = ENOMEM;
468 bp2->bio_done = g_disk_done;
469 bp2->bio_caller1 = sc;
470 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
471 bp2->bio_bcount = bp2->bio_length;
473 devstat_start_transaction_bio(dp->d_devstat, bp2);
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))
527 else if (g_handleattr_str(bp, "GEOM::attachment",
534 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
536 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
542 if (bp->bio_cmd == BIO_ZONE) {
543 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
547 g_trace(G_T_BIO, "g_disk_zone(%s)",
550 bp2 = g_clone_bio(bp);
552 g_io_deliver(bp, ENOMEM);
555 bp2->bio_done = g_disk_done;
556 bp2->bio_caller1 = sc;
558 devstat_start_transaction_bio(dp->d_devstat, bp2);
562 bp2 = g_clone_bio(bp);
564 g_io_deliver(bp, ENOMEM);
567 bp2->bio_done = g_disk_done;
568 bp2->bio_caller1 = sc;
576 if (error != EJUSTRETURN)
577 g_io_deliver(bp, error);
582 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
586 struct g_disk_softc *sc;
591 if (sc == NULL || (dp = sc->dp) == NULL)
593 if (indent == NULL) {
594 sbuf_printf(sb, " hd %u", dp->d_fwheads);
595 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
599 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
600 indent, dp->d_fwheads);
601 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
602 indent, dp->d_fwsectors);
605 * "rotationrate" is a little complicated, because the value
606 * returned by the drive might not be the RPM; 0 and 1 are
607 * special cases, and there's also a valid range.
609 sbuf_printf(sb, "%s<rotationrate>", indent);
610 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
611 sbuf_cat(sb, "unknown"); /* don't report RPM. */
612 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
614 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
615 (dp->d_rotation_rate <= DISK_RR_MAX))
616 sbuf_printf(sb, "%u", dp->d_rotation_rate);
618 sbuf_cat(sb, "invalid");
619 sbuf_cat(sb, "</rotationrate>\n");
620 if (dp->d_getattr != NULL) {
621 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
624 bp->bio_attribute = "GEOM::ident";
625 bp->bio_length = DISK_IDENT_SIZE;
627 res = dp->d_getattr(bp);
628 sbuf_printf(sb, "%s<ident>", indent);
629 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
630 sbuf_cat(sb, "</ident>\n");
631 bp->bio_attribute = "GEOM::lunid";
632 bp->bio_length = DISK_IDENT_SIZE;
634 if (dp->d_getattr(bp) == 0) {
635 sbuf_printf(sb, "%s<lunid>", indent);
636 g_conf_cat_escaped(sb, buf);
637 sbuf_cat(sb, "</lunid>\n");
639 bp->bio_attribute = "GEOM::lunname";
640 bp->bio_length = DISK_IDENT_SIZE;
642 if (dp->d_getattr(bp) == 0) {
643 sbuf_printf(sb, "%s<lunname>", indent);
644 g_conf_cat_escaped(sb, buf);
645 sbuf_cat(sb, "</lunname>\n");
650 sbuf_printf(sb, "%s<ident>", indent);
651 g_conf_cat_escaped(sb, dp->d_ident);
652 sbuf_cat(sb, "</ident>\n");
654 sbuf_printf(sb, "%s<descr>", indent);
655 g_conf_cat_escaped(sb, dp->d_descr);
656 sbuf_cat(sb, "</descr>\n");
661 g_disk_resize(void *ptr, int flag)
665 struct g_provider *pp;
667 if (flag == EV_CANCEL)
674 if (dp->d_destroyed || gp == NULL)
677 LIST_FOREACH(pp, &gp->provider, provider) {
678 if (pp->sectorsize != 0 &&
679 pp->sectorsize != dp->d_sectorsize)
680 g_wither_provider(pp, ENXIO);
682 g_resize_provider(pp, dp->d_mediasize);
687 g_disk_create(void *arg, int flag)
690 struct g_provider *pp;
692 struct g_disk_softc *sc;
693 struct disk_alias *dap;
696 if (flag == EV_CANCEL)
701 mtx_pool_lock(mtxpool_sleep, dp);
702 dp->d_init_level = DISK_INIT_START;
705 * If the disk has already gone away, we can just stop here and
706 * call the user's callback to tell him we've cleaned things up.
708 if (dp->d_goneflag != 0) {
709 mtx_pool_unlock(mtxpool_sleep, dp);
710 if (dp->d_gone != NULL)
714 mtx_pool_unlock(mtxpool_sleep, dp);
716 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
717 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
719 sc->d_devstat = dp->d_devstat;
720 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
722 LIST_FOREACH(dap, &dp->d_aliases, da_next) {
723 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit);
724 g_geom_add_alias(gp, tmpstr);
726 pp = g_new_providerf(gp, "%s", gp->name);
727 devstat_remove_entry(pp->stat);
729 dp->d_devstat->id = pp;
730 pp->mediasize = dp->d_mediasize;
731 pp->sectorsize = dp->d_sectorsize;
732 pp->stripeoffset = dp->d_stripeoffset;
733 pp->stripesize = dp->d_stripesize;
734 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
735 pp->flags |= G_PF_ACCEPT_UNMAPPED;
736 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
737 pp->flags |= G_PF_DIRECT_SEND;
738 pp->flags |= G_PF_DIRECT_RECEIVE;
740 printf("GEOM: new disk %s\n", gp->name);
741 sysctl_ctx_init(&sc->sysctl_ctx);
742 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
743 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
744 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
745 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr);
746 if (sc->sysctl_tree != NULL) {
747 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
748 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
749 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
751 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
752 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
753 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, dp, 0,
754 g_disk_sysctl_flags, "A", "Report disk flags");
758 g_error_provider(pp, 0);
760 mtx_pool_lock(mtxpool_sleep, dp);
761 dp->d_init_level = DISK_INIT_DONE;
764 * If the disk has gone away at this stage, start the withering
767 if (dp->d_goneflag != 0) {
768 mtx_pool_unlock(mtxpool_sleep, dp);
769 g_wither_provider(pp, ENXIO);
772 mtx_pool_unlock(mtxpool_sleep, dp);
777 * We get this callback after all of the consumers have gone away, and just
778 * before the provider is freed. If the disk driver provided a d_gone
779 * callback, let them know that it is okay to free resources -- they won't
780 * be getting any more accesses from GEOM.
783 g_disk_providergone(struct g_provider *pp)
786 struct g_disk_softc *sc;
788 sc = (struct g_disk_softc *)pp->private;
790 if (dp != NULL && dp->d_gone != NULL)
792 if (sc->sysctl_tree != NULL) {
793 sysctl_ctx_free(&sc->sysctl_ctx);
794 sc->sysctl_tree = NULL;
796 if (sc->led[0] != 0) {
797 led_set(sc->led, "0");
801 pp->geom->softc = NULL;
802 mtx_destroy(&sc->done_mtx);
807 g_disk_destroy(void *ptr, int flag)
811 struct g_disk_softc *sc;
812 struct disk_alias *dap, *daptmp;
822 g_wither_geom(gp, ENXIO);
824 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
831 * We only allow printable characters in disk ident,
832 * the rest is converted to 'x<HH>'.
835 g_disk_ident_adjust(char *ident, size_t size)
837 char *p, tmp[4], newid[DISK_IDENT_SIZE];
840 for (p = ident; *p != '\0'; p++) {
845 snprintf(tmp, sizeof(tmp), "x%02hhx",
846 *(unsigned char *)p);
848 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
852 strlcpy(ident, newid, size);
860 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
861 LIST_INIT(&dp->d_aliases);
866 disk_create(struct disk *dp, int version)
869 if (version != DISK_VERSION) {
870 printf("WARNING: Attempt to add disk %s%d %s",
871 dp->d_name, dp->d_unit,
872 " using incompatible ABI version of disk(9)\n");
873 printf("WARNING: Ignoring disk %s%d\n",
874 dp->d_name, dp->d_unit);
877 if (dp->d_flags & DISKFLAG_RESERVED) {
878 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
879 dp->d_name, dp->d_unit);
880 printf("WARNING: Ignoring disk %s%d\n",
881 dp->d_name, dp->d_unit);
884 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
885 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
886 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
887 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
888 if (dp->d_devstat == NULL)
889 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
890 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
891 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
894 dp->d_init_level = DISK_INIT_NONE;
896 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
897 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
901 disk_destroy(struct disk *dp)
907 if (dp->d_devstat != NULL)
908 devstat_remove_entry(dp->d_devstat);
909 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
913 disk_add_alias(struct disk *dp, const char *name)
915 struct disk_alias *dap;
917 dap = (struct disk_alias *)g_malloc(
918 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
919 strcpy((char *)(dap + 1), name);
920 dap->da_alias = (const char *)(dap + 1);
921 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
925 disk_gone(struct disk *dp)
928 struct g_provider *pp;
930 mtx_pool_lock(mtxpool_sleep, dp);
933 * Second wither call makes no sense, plus we can not access the list
934 * of providers without topology lock after calling wither once.
936 if (dp->d_goneflag != 0) {
937 mtx_pool_unlock(mtxpool_sleep, dp);
944 * If we're still in the process of creating this disk (the
945 * g_disk_create() function is still queued, or is in
946 * progress), the init level will not yet be DISK_INIT_DONE.
948 * If that is the case, g_disk_create() will see d_goneflag
949 * and take care of cleaning things up.
951 * If the disk has already been created, we default to
952 * withering the provider as usual below.
954 * If the caller has not set a d_gone() callback, he will
955 * not be any worse off by returning here, because the geom
956 * has not been fully setup in any case.
958 if (dp->d_init_level < DISK_INIT_DONE) {
959 mtx_pool_unlock(mtxpool_sleep, dp);
962 mtx_pool_unlock(mtxpool_sleep, dp);
965 pp = LIST_FIRST(&gp->provider);
967 KASSERT(LIST_NEXT(pp, provider) == NULL,
968 ("geom %p has more than one provider", gp));
969 g_wither_provider(pp, ENXIO);
974 disk_attr_changed(struct disk *dp, const char *attr, int flag)
977 struct g_provider *pp;
978 char devnamebuf[128];
982 LIST_FOREACH(pp, &gp->provider, provider)
983 (void)g_attr_changed(pp, attr, flag);
984 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
986 devctl_notify("GEOM", "disk", attr, devnamebuf);
990 disk_media_changed(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_changed(pp, flag);
1007 disk_media_gone(struct disk *dp, int flag)
1010 struct g_provider *pp;
1014 pp = LIST_FIRST(&gp->provider);
1016 KASSERT(LIST_NEXT(pp, provider) == NULL,
1017 ("geom %p has more than one provider", gp));
1018 g_media_gone(pp, flag);
1024 disk_resize(struct disk *dp, int flag)
1027 if (dp->d_destroyed || dp->d_geom == NULL)
1030 return (g_post_event(g_disk_resize, dp, flag, NULL));
1034 g_kern_disks(void *p, int flag __unused)
1042 g_topology_assert();
1043 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1044 sbuf_printf(sb, "%s%s", sp, gp->name);
1051 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1057 sb = sbuf_new_auto();
1058 dp = (struct disk *)arg1;
1059 sbuf_printf(sb, "%b", dp->d_flags,
1065 "\6DIRECTCOMPLETION"
1070 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1076 sysctl_disks(SYSCTL_HANDLER_ARGS)
1081 sb = sbuf_new_auto();
1082 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1083 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1088 SYSCTL_PROC(_kern, OID_AUTO, disks,
1089 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1090 sysctl_disks, "A", "names of available disks");