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>
53 #include <sys/devicestat.h>
56 #include <sys/mutex.h>
57 #include <geom/geom.h>
58 #include <geom/geom_disk.h>
59 #include <geom/geom_int.h>
61 #include <dev/led/led.h>
63 #include <machine/bus.h>
67 struct devstat *d_devstat;
68 struct sysctl_ctx_list sysctl_ctx;
69 struct sysctl_oid *sysctl_tree;
75 static g_access_t g_disk_access;
76 static g_start_t g_disk_start;
77 static g_ioctl_t g_disk_ioctl;
78 static g_dumpconf_t g_disk_dumpconf;
79 static g_provgone_t g_disk_providergone;
81 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
83 static struct g_class g_disk_class = {
84 .name = G_DISK_CLASS_NAME,
86 .start = g_disk_start,
87 .access = g_disk_access,
88 .ioctl = g_disk_ioctl,
89 .providergone = g_disk_providergone,
90 .dumpconf = g_disk_dumpconf,
93 SYSCTL_DECL(_kern_geom);
94 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
97 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
100 g_disk_access(struct g_provider *pp, int r, int w, int e)
103 struct g_disk_softc *sc;
106 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
110 if ((dp = sc->dp) == NULL || dp->d_destroyed) {
112 * Allow decreasing access count even if disk is not
115 if (r <= 0 && w <= 0 && e <= 0)
123 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
125 * It would be better to defer this decision to d_open if
126 * it was able to take flags.
128 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
130 if (error == 0 && dp->d_open != NULL)
131 error = dp->d_open(dp);
132 if (bootverbose && error != 0)
133 printf("Opened disk %s -> %d\n", pp->name, error);
136 pp->sectorsize = dp->d_sectorsize;
137 if (dp->d_maxsize == 0) {
138 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
139 dp->d_name, dp->d_unit);
140 dp->d_maxsize = DFLTPHYS;
142 if (dp->d_delmaxsize == 0) {
143 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
144 printf("WARNING: Disk drive %s%d has no "
145 "d_delmaxsize\n", dp->d_name, dp->d_unit);
147 dp->d_delmaxsize = dp->d_maxsize;
149 pp->stripeoffset = dp->d_stripeoffset;
150 pp->stripesize = dp->d_stripesize;
151 dp->d_flags |= DISKFLAG_OPEN;
153 * Do not invoke resize event when initial size was zero.
154 * Some disks report its size only after first opening.
156 if (pp->mediasize == 0)
157 pp->mediasize = dp->d_mediasize;
159 g_resize_provider(pp, dp->d_mediasize);
160 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
161 if (dp->d_close != NULL) {
162 error = dp->d_close(dp);
164 printf("Closed disk %s -> %d\n",
167 sc->state = G_STATE_ACTIVE;
169 led_set(sc->led, "0");
170 dp->d_flags &= ~DISKFLAG_OPEN;
176 g_disk_kerneldump(struct bio *bp, struct disk *dp)
178 struct g_kerneldump *gkd;
181 gkd = (struct g_kerneldump*)bp->bio_data;
182 gp = bp->bio_to->geom;
183 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
184 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
185 if (dp->d_dump == NULL) {
186 g_io_deliver(bp, ENODEV);
189 gkd->di.dumper = dp->d_dump;
191 gkd->di.blocksize = dp->d_sectorsize;
192 gkd->di.maxiosize = dp->d_maxsize;
193 gkd->di.mediaoffset = gkd->offset;
194 if ((gkd->offset + gkd->length) > dp->d_mediasize)
195 gkd->length = dp->d_mediasize - gkd->offset;
196 gkd->di.mediasize = gkd->length;
201 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
205 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
206 if (sc->led[0] != 0) {
211 case G_STATE_REBUILD:
221 led_set(sc->led, cmd);
227 g_disk_done(struct bio *bp)
231 struct g_disk_softc *sc;
233 /* See "notes" for why we need a mutex here */
234 sc = bp->bio_caller1;
235 bp2 = bp->bio_parent;
237 mtx_lock(&sc->done_mtx);
238 if (bp2->bio_error == 0)
239 bp2->bio_error = bp->bio_error;
240 bp2->bio_completed += bp->bio_length - bp->bio_resid;
242 switch (bp->bio_cmd) {
244 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
250 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
256 if (bp2->bio_children == bp2->bio_inbed) {
257 mtx_unlock(&sc->done_mtx);
258 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
259 g_io_deliver(bp2, bp2->bio_error);
261 mtx_unlock(&sc->done_mtx);
266 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
269 struct g_disk_softc *sc;
273 KASSERT(dp != NULL && !dp->d_destroyed,
274 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
276 if (dp->d_ioctl == NULL)
278 return (dp->d_ioctl(dp, cmd, data, fflag, td));
282 g_disk_maxsize(struct disk *dp, struct bio *bp)
284 if (bp->bio_cmd == BIO_DELETE)
285 return (dp->d_delmaxsize);
286 return (dp->d_maxsize);
290 g_disk_maxsegs(struct disk *dp, struct bio *bp)
292 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
296 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
299 bp->bio_offset += off;
300 bp->bio_length -= off;
302 if ((bp->bio_flags & BIO_VLIST) != 0) {
303 bus_dma_segment_t *seg, *end;
305 seg = (bus_dma_segment_t *)bp->bio_data;
306 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
307 off += bp->bio_ma_offset;
308 while (off >= seg->ds_len) {
309 KASSERT((seg != end),
310 ("vlist request runs off the end"));
314 bp->bio_ma_offset = off;
315 bp->bio_ma_n = end - seg;
316 bp->bio_data = (void *)seg;
317 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
318 bp->bio_ma += off / PAGE_SIZE;
319 bp->bio_ma_offset += off;
320 bp->bio_ma_offset %= PAGE_SIZE;
321 bp->bio_ma_n -= off / PAGE_SIZE;
328 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
329 off_t *plength, int *ppages)
331 uintptr_t seg_page_base;
332 uintptr_t seg_page_end;
340 if (length > seg->ds_len - offset)
341 length = seg->ds_len - offset;
343 seg_page_base = trunc_page(seg->ds_addr + offset);
344 seg_page_end = round_page(seg->ds_addr + offset + length);
345 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
347 if (seg_pages > *ppages) {
349 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
350 (seg->ds_addr + offset);
355 *ppages -= seg_pages;
359 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
361 bus_dma_segment_t *seg, *end;
366 seg = (bus_dma_segment_t *)bp->bio_data;
367 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
368 residual = bp->bio_length;
369 offset = bp->bio_ma_offset;
370 pages = g_disk_maxsegs(dp, bp);
371 while (residual != 0 && pages != 0) {
372 KASSERT((seg != end),
373 ("vlist limit runs off the end"));
374 g_disk_seg_limit(seg, &offset, &residual, &pages);
383 g_disk_limit(struct disk *dp, struct bio *bp)
385 bool limited = false;
388 maxsz = g_disk_maxsize(dp, bp);
391 * XXX: If we have a stripesize we should really use it here.
392 * Care should be taken in the delete case if this is done
393 * as deletes can be very sensitive to size given how they
396 if (bp->bio_length > maxsz) {
397 bp->bio_length = maxsz;
401 if ((bp->bio_flags & BIO_VLIST) != 0) {
402 bus_dma_segment_t *firstseg, *endseg;
405 firstseg = (bus_dma_segment_t*)bp->bio_data;
406 residual = g_disk_vlist_limit(dp, bp, &endseg);
408 bp->bio_ma_n = endseg - firstseg;
409 bp->bio_length -= residual;
412 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
414 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
421 g_disk_start(struct bio *bp)
423 struct bio *bp2, *bp3;
425 struct g_disk_softc *sc;
429 biotrack(bp, __func__);
431 sc = bp->bio_to->private;
433 KASSERT(dp != NULL && !dp->d_destroyed,
434 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
436 switch(bp->bio_cmd) {
438 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
445 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
446 (bp->bio_flags & BIO_UNMAPPED) == 0,
447 ("unmapped bio not supported by disk %s", dp->d_name));
450 bp2 = g_clone_bio(bp);
456 if (g_disk_limit(dp, bp2)) {
457 off += bp2->bio_length;
460 * To avoid a race, we need to grab the next bio
461 * before we schedule this one. See "notes".
463 bp3 = g_clone_bio(bp);
465 bp->bio_error = ENOMEM;
467 bp2->bio_done = g_disk_done;
468 bp2->bio_caller1 = sc;
469 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
470 bp2->bio_bcount = bp2->bio_length;
472 devstat_start_transaction_bio(dp->d_devstat, bp2);
480 g_disk_advance(dp, bp2, off);
484 /* Give the driver a chance to override */
485 if (dp->d_getattr != NULL) {
486 if (bp->bio_disk == NULL)
488 error = dp->d_getattr(bp);
493 if (g_handleattr_int(bp, "GEOM::candelete",
494 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
496 else if (g_handleattr_int(bp, "GEOM::fwsectors",
499 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
501 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
503 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
505 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
508 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
511 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
512 dp->d_hba_subvendor))
514 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
515 dp->d_hba_subdevice))
517 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
518 g_disk_kerneldump(bp, dp);
519 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
520 g_disk_setstate(bp, sc);
521 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
522 dp->d_rotation_rate))
524 else if (g_handleattr_str(bp, "GEOM::attachment",
531 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
533 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
539 if (bp->bio_cmd == BIO_ZONE) {
540 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
544 g_trace(G_T_BIO, "g_disk_zone(%s)",
547 bp2 = g_clone_bio(bp);
549 g_io_deliver(bp, ENOMEM);
552 bp2->bio_done = g_disk_done;
553 bp2->bio_caller1 = sc;
555 devstat_start_transaction_bio(dp->d_devstat, bp2);
559 bp2 = g_clone_bio(bp);
561 g_io_deliver(bp, ENOMEM);
564 bp2->bio_done = g_disk_done;
565 bp2->bio_caller1 = sc;
573 if (error != EJUSTRETURN)
574 g_io_deliver(bp, error);
579 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
583 struct g_disk_softc *sc;
588 if (sc == NULL || (dp = sc->dp) == NULL)
590 if (indent == NULL) {
591 sbuf_printf(sb, " hd %u", dp->d_fwheads);
592 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
596 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
597 indent, dp->d_fwheads);
598 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
599 indent, dp->d_fwsectors);
602 * "rotationrate" is a little complicated, because the value
603 * returned by the drive might not be the RPM; 0 and 1 are
604 * special cases, and there's also a valid range.
606 sbuf_printf(sb, "%s<rotationrate>", indent);
607 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
608 sbuf_cat(sb, "unknown"); /* don't report RPM. */
609 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
611 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
612 (dp->d_rotation_rate <= DISK_RR_MAX))
613 sbuf_printf(sb, "%u", dp->d_rotation_rate);
615 sbuf_cat(sb, "invalid");
616 sbuf_cat(sb, "</rotationrate>\n");
617 if (dp->d_getattr != NULL) {
618 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
621 bp->bio_attribute = "GEOM::ident";
622 bp->bio_length = DISK_IDENT_SIZE;
624 res = dp->d_getattr(bp);
625 sbuf_printf(sb, "%s<ident>", indent);
626 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
627 sbuf_cat(sb, "</ident>\n");
628 bp->bio_attribute = "GEOM::lunid";
629 bp->bio_length = DISK_IDENT_SIZE;
631 if (dp->d_getattr(bp) == 0) {
632 sbuf_printf(sb, "%s<lunid>", indent);
633 g_conf_cat_escaped(sb, buf);
634 sbuf_cat(sb, "</lunid>\n");
636 bp->bio_attribute = "GEOM::lunname";
637 bp->bio_length = DISK_IDENT_SIZE;
639 if (dp->d_getattr(bp) == 0) {
640 sbuf_printf(sb, "%s<lunname>", indent);
641 g_conf_cat_escaped(sb, buf);
642 sbuf_cat(sb, "</lunname>\n");
647 sbuf_printf(sb, "%s<ident>", indent);
648 g_conf_cat_escaped(sb, dp->d_ident);
649 sbuf_cat(sb, "</ident>\n");
651 sbuf_printf(sb, "%s<descr>", indent);
652 g_conf_cat_escaped(sb, dp->d_descr);
653 sbuf_cat(sb, "</descr>\n");
658 g_disk_resize(void *ptr, int flag)
662 struct g_provider *pp;
664 if (flag == EV_CANCEL)
671 if (dp->d_destroyed || gp == NULL)
674 LIST_FOREACH(pp, &gp->provider, provider) {
675 if (pp->sectorsize != 0 &&
676 pp->sectorsize != dp->d_sectorsize)
677 g_wither_provider(pp, ENXIO);
679 g_resize_provider(pp, dp->d_mediasize);
684 g_disk_create(void *arg, int flag)
687 struct g_provider *pp;
689 struct g_disk_softc *sc;
690 struct disk_alias *dap;
693 if (flag == EV_CANCEL)
698 mtx_pool_lock(mtxpool_sleep, dp);
699 dp->d_init_level = DISK_INIT_START;
702 * If the disk has already gone away, we can just stop here and
703 * call the user's callback to tell him we've cleaned things up.
705 if (dp->d_goneflag != 0) {
706 mtx_pool_unlock(mtxpool_sleep, dp);
707 if (dp->d_gone != NULL)
711 mtx_pool_unlock(mtxpool_sleep, dp);
713 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
714 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
716 if (dp->d_devstat == NULL) {
717 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
718 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
719 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
721 sc->d_devstat = dp->d_devstat;
722 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
724 pp = g_new_providerf(gp, "%s", gp->name);
725 LIST_FOREACH(dap, &dp->d_aliases, da_next)
726 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit);
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_MPSAFE, 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);
862 dp->d_init_level = DISK_INIT_NONE;
863 dp->d_cevent = g_alloc_event(M_WAITOK);
864 dp->d_devent = g_alloc_event(M_WAITOK);
869 disk_create(struct disk *dp, int version)
872 if (version != DISK_VERSION) {
873 printf("WARNING: Attempt to add disk %s%d %s",
874 dp->d_name, dp->d_unit,
875 " using incompatible ABI version of disk(9)\n");
876 printf("WARNING: Ignoring disk %s%d\n",
877 dp->d_name, dp->d_unit);
880 if (dp->d_flags & DISKFLAG_RESERVED) {
881 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
882 dp->d_name, dp->d_unit);
883 printf("WARNING: Ignoring disk %s%d\n",
884 dp->d_name, dp->d_unit);
887 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
888 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
889 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
890 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
891 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
893 dp->d_init_level = DISK_INIT_CREATE;
895 KASSERT(dp->d_cevent != NULL,
896 ("Disk create for %p with event NULL", dp));
897 g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL);
901 disk_destroy(struct disk *dp)
903 struct disk_alias *dap, *daptmp;
905 /* If disk_create() was never called, just free the resources. */
906 if (dp->d_init_level < DISK_INIT_CREATE) {
907 if (dp->d_devstat != NULL)
908 devstat_remove_entry(dp->d_devstat);
909 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
911 g_free(dp->d_cevent);
912 g_free(dp->d_devent);
917 KASSERT(dp->d_devent != NULL,
918 ("Disk destroy for %p with event NULL", dp));
922 if (dp->d_devstat != NULL)
923 devstat_remove_entry(dp->d_devstat);
924 g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL);
928 disk_add_alias(struct disk *dp, const char *name)
930 struct disk_alias *dap;
932 dap = (struct disk_alias *)g_malloc(
933 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
934 strcpy((char *)(dap + 1), name);
935 dap->da_alias = (const char *)(dap + 1);
936 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
940 disk_gone(struct disk *dp)
943 struct g_provider *pp;
945 mtx_pool_lock(mtxpool_sleep, dp);
948 * Second wither call makes no sense, plus we can not access the list
949 * of providers without topology lock after calling wither once.
951 if (dp->d_goneflag != 0) {
952 mtx_pool_unlock(mtxpool_sleep, dp);
959 * If we're still in the process of creating this disk (the
960 * g_disk_create() function is still queued, or is in
961 * progress), the init level will not yet be DISK_INIT_DONE.
963 * If that is the case, g_disk_create() will see d_goneflag
964 * and take care of cleaning things up.
966 * If the disk has already been created, we default to
967 * withering the provider as usual below.
969 * If the caller has not set a d_gone() callback, he will
970 * not be any worse off by returning here, because the geom
971 * has not been fully setup in any case.
973 if (dp->d_init_level < DISK_INIT_DONE) {
974 mtx_pool_unlock(mtxpool_sleep, dp);
977 mtx_pool_unlock(mtxpool_sleep, dp);
980 pp = LIST_FIRST(&gp->provider);
982 KASSERT(LIST_NEXT(pp, provider) == NULL,
983 ("geom %p has more than one provider", gp));
984 g_wither_provider(pp, ENXIO);
989 disk_attr_changed(struct disk *dp, const char *attr, int flag)
991 struct g_geom *gp = dp->d_geom;
992 struct g_provider *pp;
993 char devnamebuf[128];
997 LIST_FOREACH(pp, &gp->provider, provider)
998 (void)g_attr_changed(pp, attr, flag);
999 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
1001 devctl_notify("GEOM", "disk", attr, devnamebuf);
1005 disk_media_changed(struct disk *dp, int flag)
1007 struct g_geom *gp = dp->d_geom;
1008 struct g_provider *pp;
1012 pp = LIST_FIRST(&gp->provider);
1014 KASSERT(LIST_NEXT(pp, provider) == NULL,
1015 ("geom %p has more than one provider", gp));
1016 g_media_changed(pp, flag);
1021 disk_media_gone(struct disk *dp, int flag)
1023 struct g_geom *gp = dp->d_geom;
1024 struct g_provider *pp;
1028 pp = LIST_FIRST(&gp->provider);
1030 KASSERT(LIST_NEXT(pp, provider) == NULL,
1031 ("geom %p has more than one provider", gp));
1032 g_media_gone(pp, flag);
1037 disk_resize(struct disk *dp, int flag)
1040 if (dp->d_destroyed || dp->d_geom == NULL)
1043 return (g_post_event(g_disk_resize, dp, flag, NULL));
1047 g_kern_disks(void *p, int flag __unused)
1055 g_topology_assert();
1056 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
1057 sbuf_printf(sb, "%s%s", sp, gp->name);
1064 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
1070 sb = sbuf_new_auto();
1071 dp = (struct disk *)arg1;
1072 sbuf_printf(sb, "%b", dp->d_flags,
1078 "\6DIRECTCOMPLETION"
1083 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1089 sysctl_disks(SYSCTL_HANDLER_ARGS)
1094 sb = sbuf_new_auto();
1095 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1096 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1101 SYSCTL_PROC(_kern, OID_AUTO, disks,
1102 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1103 sysctl_disks, "A", "names of available disks");