2 * Copyright (c) 2003,2004,2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * ----------------------------------------------------------------------------
35 * "THE BEER-WARE LICENSE" (Revision 42):
36 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
37 * can do whatever you want with this stuff. If we meet some day, and you think
38 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
39 * ----------------------------------------------------------------------------
41 * Copyright (c) 1982, 1986, 1988, 1993
42 * The Regents of the University of California. All rights reserved.
43 * (c) UNIX System Laboratories, Inc.
44 * All or some portions of this file are derived from material licensed
45 * to the University of California by American Telephone and Telegraph
46 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
47 * the permission of UNIX System Laboratories, Inc.
49 * Redistribution and use in source and binary forms, with or without
50 * modification, are permitted provided that the following conditions
52 * 1. Redistributions of source code must retain the above copyright
53 * notice, this list of conditions and the following disclaimer.
54 * 2. Redistributions in binary form must reproduce the above copyright
55 * notice, this list of conditions and the following disclaimer in the
56 * documentation and/or other materials provided with the distribution.
57 * 3. All advertising materials mentioning features or use of this software
58 * must display the following acknowledgement:
59 * This product includes software developed by the University of
60 * California, Berkeley and its contributors.
61 * 4. Neither the name of the University nor the names of its contributors
62 * may be used to endorse or promote products derived from this software
63 * without specific prior written permission.
65 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
66 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
67 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
68 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
69 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
73 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
74 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
77 * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94
78 * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $
79 * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $
80 * $DragonFly: src/sys/kern/subr_disk.c,v 1.40 2008/06/05 18:06:32 swildner Exp $
83 #include <sys/param.h>
84 #include <sys/systm.h>
85 #include <sys/kernel.h>
87 #include <sys/sysctl.h>
90 #include <sys/disklabel.h>
91 #include <sys/disklabel32.h>
92 #include <sys/disklabel64.h>
93 #include <sys/diskslice.h>
94 #include <sys/diskmbr.h>
96 #include <sys/kerneldump.h>
97 #include <sys/malloc.h>
98 #include <sys/sysctl.h>
99 #include <machine/md_var.h>
100 #include <sys/ctype.h>
101 #include <sys/syslog.h>
102 #include <sys/device.h>
103 #include <sys/msgport.h>
104 #include <sys/devfs.h>
105 #include <sys/thread.h>
106 #include <sys/dsched.h>
107 #include <sys/queue.h>
108 #include <sys/lock.h>
109 #include <sys/udev.h>
111 #include <sys/buf2.h>
112 #include <sys/mplock2.h>
113 #include <sys/msgport2.h>
114 #include <sys/thread2.h>
116 static MALLOC_DEFINE(M_DISK
, "disk", "disk data");
117 static int disk_debug_enable
= 0;
119 static void disk_msg_autofree_reply(lwkt_port_t
, lwkt_msg_t
);
120 static void disk_msg_core(void *);
121 static int disk_probe_slice(struct disk
*dp
, cdev_t dev
, int slice
, int reprobe
);
122 static void disk_probe(struct disk
*dp
, int reprobe
);
123 static void _setdiskinfo(struct disk
*disk
, struct disk_info
*info
);
124 static void bioqwritereorder(struct bio_queue_head
*bioq
);
125 static void disk_cleanserial(char *serno
);
126 static int disk_debug(int, char *, ...) __printflike(2, 3);
128 static d_open_t diskopen
;
129 static d_close_t diskclose
;
130 static d_ioctl_t diskioctl
;
131 static d_strategy_t diskstrategy
;
132 static d_psize_t diskpsize
;
133 static d_clone_t diskclone
;
134 static d_dump_t diskdump
;
136 static LIST_HEAD(, disk
) disklist
= LIST_HEAD_INITIALIZER(&disklist
);
137 static struct lwkt_token disklist_token
;
139 static struct dev_ops disk_ops
= {
140 { "disk", 0, D_DISK
| D_MPSAFE
},
142 .d_close
= diskclose
,
144 .d_write
= physwrite
,
145 .d_ioctl
= diskioctl
,
146 .d_strategy
= diskstrategy
,
148 .d_psize
= diskpsize
,
152 static struct objcache
*disk_msg_cache
;
154 struct objcache_malloc_args disk_msg_malloc_args
= {
155 sizeof(struct disk_msg
), M_DISK
};
157 static struct lwkt_port disk_dispose_port
;
158 static struct lwkt_port disk_msg_port
;
161 disk_debug(int level
, char *fmt
, ...)
166 if (level
<= disk_debug_enable
)
174 disk_probe_slice(struct disk
*dp
, cdev_t dev
, int slice
, int reprobe
)
176 struct disk_info
*info
= &dp
->d_info
;
177 struct diskslice
*sp
= &dp
->d_slice
->dss_slices
[slice
];
179 struct partinfo part
;
186 "disk_probe_slice (begin): %s (%s)\n",
187 dev
->si_name
, dp
->d_cdev
->si_name
);
189 sno
= slice
? slice
- 1 : 0;
191 ops
= &disklabel32_ops
;
192 msg
= ops
->op_readdisklabel(dev
, sp
, &sp
->ds_label
, info
);
193 if (msg
&& !strcmp(msg
, "no disk label")) {
194 ops
= &disklabel64_ops
;
195 msg
= ops
->op_readdisklabel(dev
, sp
, &sp
->ds_label
, info
);
198 if (slice
!= WHOLE_DISK_SLICE
)
199 ops
->op_adjust_label_reserved(dp
->d_slice
, slice
, sp
);
204 for (i
= 0; i
< ops
->op_getnumparts(sp
->ds_label
); i
++) {
205 ops
->op_loadpartinfo(sp
->ds_label
, i
, &part
);
208 (ndev
= devfs_find_device_by_name("%s%c",
209 dev
->si_name
, 'a' + i
))
212 * Device already exists and
215 ndev
->si_flags
|= SI_REPROBE_TEST
;
217 ndev
= make_dev_covering(&disk_ops
, dp
->d_rawdev
->si_ops
,
218 dkmakeminor(dkunit(dp
->d_cdev
),
220 UID_ROOT
, GID_OPERATOR
, 0640,
221 "%s%c", dev
->si_name
, 'a'+ i
);
223 udev_dict_set_cstr(ndev
, "subsystem", "disk");
224 /* Inherit parent's disk type */
225 if (dp
->d_disktype
) {
226 udev_dict_set_cstr(ndev
, "disk-type",
227 __DECONST(char *, dp
->d_disktype
));
229 if (dp
->d_info
.d_serialno
) {
232 dp
->d_info
.d_serialno
,
235 ndev
->si_flags
|= SI_REPROBE_TEST
;
239 } else if (info
->d_dsflags
& DSO_COMPATLABEL
) {
241 if (sp
->ds_size
>= 0x100000000ULL
)
242 ops
= &disklabel64_ops
;
244 ops
= &disklabel32_ops
;
245 sp
->ds_label
= ops
->op_clone_label(info
, sp
);
247 if (sp
->ds_type
== DOSPTYP_386BSD
|| /* XXX */
248 sp
->ds_type
== DOSPTYP_NETBSD
||
249 sp
->ds_type
== DOSPTYP_OPENBSD
) {
250 log(LOG_WARNING
, "%s: cannot find label (%s)\n",
256 sp
->ds_wlabel
= FALSE
;
259 return (msg
? EINVAL
: 0);
263 * This routine is only called for newly minted drives or to reprobe
264 * a drive with no open slices. disk_probe_slice() is called directly
265 * when reprobing partition changes within slices.
268 disk_probe(struct disk
*dp
, int reprobe
)
270 struct disk_info
*info
= &dp
->d_info
;
271 cdev_t dev
= dp
->d_cdev
;
274 struct diskslices
*osp
;
275 struct diskslice
*sp
;
277 KKASSERT (info
->d_media_blksize
!= 0);
280 dp
->d_slice
= dsmakeslicestruct(BASE_SLICE
, info
);
281 disk_debug(1, "disk_probe (begin): %s\n", dp
->d_cdev
->si_name
);
283 error
= mbrinit(dev
, info
, &(dp
->d_slice
));
289 for (i
= 0; i
< dp
->d_slice
->dss_nslices
; i
++) {
291 * Ignore the whole-disk slice, it has already been created.
293 if (i
== WHOLE_DISK_SLICE
)
295 sp
= &dp
->d_slice
->dss_slices
[i
];
298 * Handle s0. s0 is a compatibility slice if there are no
299 * other slices and it has not otherwise been set up, else
302 if (i
== COMPATIBILITY_SLICE
) {
304 if (sp
->ds_type
== 0 &&
305 dp
->d_slice
->dss_nslices
== BASE_SLICE
) {
306 sp
->ds_size
= info
->d_media_blocks
;
315 * Ignore 0-length slices
317 if (sp
->ds_size
== 0)
321 (ndev
= devfs_find_device_by_name("%ss%d",
322 dev
->si_name
, sno
))) {
324 * Device already exists and is still valid
326 ndev
->si_flags
|= SI_REPROBE_TEST
;
329 * Else create new device
331 ndev
= make_dev_covering(&disk_ops
, dp
->d_rawdev
->si_ops
,
332 dkmakewholeslice(dkunit(dev
), i
),
333 UID_ROOT
, GID_OPERATOR
, 0640,
334 "%ss%d", dev
->si_name
, sno
);
335 udev_dict_set_cstr(ndev
, "subsystem", "disk");
336 /* Inherit parent's disk type */
337 if (dp
->d_disktype
) {
338 udev_dict_set_cstr(ndev
, "disk-type",
339 __DECONST(char *, dp
->d_disktype
));
341 if (dp
->d_info
.d_serialno
) {
342 make_dev_alias(ndev
, "serno/%s.s%d",
343 dp
->d_info
.d_serialno
, sno
);
346 ndev
->si_flags
|= SI_REPROBE_TEST
;
351 * Probe appropriate slices for a disklabel
353 * XXX slice type 1 used by our gpt probe code.
354 * XXX slice type 0 used by mbr compat slice.
356 if (sp
->ds_type
== DOSPTYP_386BSD
||
357 sp
->ds_type
== DOSPTYP_NETBSD
||
358 sp
->ds_type
== DOSPTYP_OPENBSD
||
361 if (dp
->d_slice
->dss_first_bsd_slice
== 0)
362 dp
->d_slice
->dss_first_bsd_slice
= i
;
363 disk_probe_slice(dp
, ndev
, i
, reprobe
);
367 disk_debug(1, "disk_probe (end): %s\n", dp
->d_cdev
->si_name
);
372 disk_msg_core(void *arg
)
375 struct diskslice
*sp
;
379 lwkt_gettoken(&disklist_token
);
380 lwkt_initport_thread(&disk_msg_port
, curthread
);
381 wakeup(curthread
); /* synchronous startup */
382 lwkt_reltoken(&disklist_token
);
384 get_mplock(); /* not mpsafe yet? */
388 msg
= (disk_msg_t
)lwkt_waitport(&disk_msg_port
, 0);
390 switch (msg
->hdr
.u
.ms_result
) {
391 case DISK_DISK_PROBE
:
392 dp
= (struct disk
*)msg
->load
;
394 "DISK_DISK_PROBE: %s\n",
395 dp
->d_cdev
->si_name
);
398 case DISK_DISK_DESTROY
:
399 dp
= (struct disk
*)msg
->load
;
401 "DISK_DISK_DESTROY: %s\n",
402 dp
->d_cdev
->si_name
);
403 devfs_destroy_subnames(dp
->d_cdev
->si_name
);
404 devfs_destroy_dev(dp
->d_cdev
);
405 lwkt_gettoken(&disklist_token
);
406 LIST_REMOVE(dp
, d_list
);
407 lwkt_reltoken(&disklist_token
);
408 if (dp
->d_info
.d_serialno
) {
409 kfree(dp
->d_info
.d_serialno
, M_TEMP
);
410 dp
->d_info
.d_serialno
= NULL
;
414 dp
= (struct disk
*)msg
->load
;
416 "DISK_DISK_UNPROBE: %s\n",
417 dp
->d_cdev
->si_name
);
418 devfs_destroy_subnames(dp
->d_cdev
->si_name
);
420 case DISK_SLICE_REPROBE
:
421 dp
= (struct disk
*)msg
->load
;
422 sp
= (struct diskslice
*)msg
->load2
;
423 devfs_clr_subnames_flag(sp
->ds_dev
->si_name
,
426 "DISK_SLICE_REPROBE: %s\n",
427 sp
->ds_dev
->si_name
);
428 disk_probe_slice(dp
, sp
->ds_dev
,
429 dkslice(sp
->ds_dev
), 1);
430 devfs_destroy_subnames_without_flag(
431 sp
->ds_dev
->si_name
, SI_REPROBE_TEST
);
433 case DISK_DISK_REPROBE
:
434 dp
= (struct disk
*)msg
->load
;
435 devfs_clr_subnames_flag(dp
->d_cdev
->si_name
, SI_REPROBE_TEST
);
437 "DISK_DISK_REPROBE: %s\n",
438 dp
->d_cdev
->si_name
);
440 devfs_destroy_subnames_without_flag(
441 dp
->d_cdev
->si_name
, SI_REPROBE_TEST
);
444 disk_debug(1, "DISK_SYNC\n");
447 devfs_debug(DEVFS_DEBUG_WARNING
,
448 "disk_msg_core: unknown message "
449 "received at core\n");
452 lwkt_replymsg(&msg
->hdr
, 0);
459 * Acts as a message drain. Any message that is replied to here gets
460 * destroyed and the memory freed.
463 disk_msg_autofree_reply(lwkt_port_t port
, lwkt_msg_t msg
)
465 objcache_put(disk_msg_cache
, msg
);
470 disk_msg_send(uint32_t cmd
, void *load
, void *load2
)
473 lwkt_port_t port
= &disk_msg_port
;
475 disk_msg
= objcache_get(disk_msg_cache
, M_WAITOK
);
477 lwkt_initmsg(&disk_msg
->hdr
, &disk_dispose_port
, 0);
479 disk_msg
->hdr
.u
.ms_result
= cmd
;
480 disk_msg
->load
= load
;
481 disk_msg
->load2
= load2
;
483 lwkt_sendmsg(port
, &disk_msg
->hdr
);
487 disk_msg_send_sync(uint32_t cmd
, void *load
, void *load2
)
489 struct lwkt_port rep_port
;
493 disk_msg
= objcache_get(disk_msg_cache
, M_WAITOK
);
494 port
= &disk_msg_port
;
496 /* XXX could probably use curthread's built-in msgport */
497 lwkt_initport_thread(&rep_port
, curthread
);
498 lwkt_initmsg(&disk_msg
->hdr
, &rep_port
, 0);
500 disk_msg
->hdr
.u
.ms_result
= cmd
;
501 disk_msg
->load
= load
;
502 disk_msg
->load2
= load2
;
504 lwkt_sendmsg(port
, &disk_msg
->hdr
);
505 lwkt_waitmsg(&disk_msg
->hdr
, 0);
506 objcache_put(disk_msg_cache
, disk_msg
);
510 * Create a raw device for the dev_ops template (which is returned). Also
511 * create a slice and unit managed disk and overload the user visible
512 * device space with it.
514 * NOTE: The returned raw device is NOT a slice and unit managed device.
515 * It is an actual raw device representing the raw disk as specified by
516 * the passed dev_ops. The disk layer not only returns such a raw device,
517 * it also uses it internally when passing (modified) commands through.
520 disk_create(int unit
, struct disk
*dp
, struct dev_ops
*raw_ops
)
522 return disk_create_named(NULL
, unit
, dp
, raw_ops
);
526 disk_create_named(const char *name
, int unit
, struct disk
*dp
, struct dev_ops
*raw_ops
)
531 name
= raw_ops
->head
.name
;
533 disk_debug(1, "disk_create (begin): %s%d\n", name
, unit
);
535 rawdev
= make_only_dev(raw_ops
, dkmakewholedisk(unit
),
536 UID_ROOT
, GID_OPERATOR
, 0640,
539 bzero(dp
, sizeof(*dp
));
541 dp
->d_rawdev
= rawdev
;
542 dp
->d_raw_ops
= raw_ops
;
543 dp
->d_dev_ops
= &disk_ops
;
544 dp
->d_cdev
= make_dev_covering(&disk_ops
, dp
->d_rawdev
->si_ops
,
545 dkmakewholedisk(unit
),
546 UID_ROOT
, GID_OPERATOR
, 0640,
548 udev_dict_set_cstr(dp
->d_cdev
, "subsystem", "disk");
549 dp
->d_cdev
->si_disk
= dp
;
551 dsched_disk_create_callback(dp
, name
, unit
);
553 lwkt_gettoken(&disklist_token
);
554 LIST_INSERT_HEAD(&disklist
, dp
, d_list
);
555 lwkt_reltoken(&disklist_token
);
557 disk_debug(1, "disk_create (end): %s%d\n", name
, unit
);
559 return (dp
->d_rawdev
);
563 disk_setdisktype(struct disk
*disk
, const char *type
)
565 KKASSERT(disk
!= NULL
);
567 disk
->d_disktype
= type
;
568 return udev_dict_set_cstr(disk
->d_cdev
, "disk-type", __DECONST(char *, type
));
572 _setdiskinfo(struct disk
*disk
, struct disk_info
*info
)
576 oldserialno
= disk
->d_info
.d_serialno
;
577 bcopy(info
, &disk
->d_info
, sizeof(disk
->d_info
));
578 info
= &disk
->d_info
;
581 "_setdiskinfo: %s\n",
582 disk
->d_cdev
->si_name
);
585 * The serial number is duplicated so the caller can throw
588 if (info
->d_serialno
&& info
->d_serialno
[0]) {
589 info
->d_serialno
= kstrdup(info
->d_serialno
, M_TEMP
);
590 disk_cleanserial(info
->d_serialno
);
592 make_dev_alias(disk
->d_cdev
, "serno/%s",
596 info
->d_serialno
= NULL
;
599 kfree(oldserialno
, M_TEMP
);
601 dsched_disk_update_callback(disk
, info
);
604 * The caller may set d_media_size or d_media_blocks and we
605 * calculate the other.
607 KKASSERT(info
->d_media_size
== 0 || info
->d_media_blksize
== 0);
608 if (info
->d_media_size
== 0 && info
->d_media_blocks
) {
609 info
->d_media_size
= (u_int64_t
)info
->d_media_blocks
*
610 info
->d_media_blksize
;
611 } else if (info
->d_media_size
&& info
->d_media_blocks
== 0 &&
612 info
->d_media_blksize
) {
613 info
->d_media_blocks
= info
->d_media_size
/
614 info
->d_media_blksize
;
618 * The si_* fields for rawdev are not set until after the
619 * disk_create() call, so someone using the cooked version
620 * of the raw device (i.e. da0s0) will not get the right
621 * si_iosize_max unless we fix it up here.
623 if (disk
->d_cdev
&& disk
->d_rawdev
&&
624 disk
->d_cdev
->si_iosize_max
== 0) {
625 disk
->d_cdev
->si_iosize_max
= disk
->d_rawdev
->si_iosize_max
;
626 disk
->d_cdev
->si_bsize_phys
= disk
->d_rawdev
->si_bsize_phys
;
627 disk
->d_cdev
->si_bsize_best
= disk
->d_rawdev
->si_bsize_best
;
630 /* Add the serial number to the udev_dictionary */
631 if (info
->d_serialno
)
632 udev_dict_set_cstr(disk
->d_cdev
, "serno", info
->d_serialno
);
636 * Disk drivers must call this routine when media parameters are available
640 disk_setdiskinfo(struct disk
*disk
, struct disk_info
*info
)
642 _setdiskinfo(disk
, info
);
643 disk_msg_send(DISK_DISK_PROBE
, disk
, NULL
);
645 "disk_setdiskinfo: sent probe for %s\n",
646 disk
->d_cdev
->si_name
);
650 disk_setdiskinfo_sync(struct disk
*disk
, struct disk_info
*info
)
652 _setdiskinfo(disk
, info
);
653 disk_msg_send_sync(DISK_DISK_PROBE
, disk
, NULL
);
655 "disk_setdiskinfo_sync: sent probe for %s\n",
656 disk
->d_cdev
->si_name
);
660 * This routine is called when an adapter detaches. The higher level
661 * managed disk device is destroyed while the lower level raw device is
665 disk_destroy(struct disk
*disk
)
667 dsched_disk_destroy_callback(disk
);
668 disk_msg_send_sync(DISK_DISK_DESTROY
, disk
, NULL
);
673 disk_dumpcheck(cdev_t dev
, u_int64_t
*size
, u_int64_t
*blkno
, u_int32_t
*secsize
)
675 struct partinfo pinfo
;
678 bzero(&pinfo
, sizeof(pinfo
));
679 error
= dev_dioctl(dev
, DIOCGPART
, (void *)&pinfo
, 0,
680 proc0
.p_ucred
, NULL
);
684 if (pinfo
.media_blksize
== 0)
687 if (blkno
) /* XXX: make sure this reserved stuff is right */
688 *blkno
= pinfo
.reserved_blocks
+
689 pinfo
.media_offset
/ pinfo
.media_blksize
;
691 *secsize
= pinfo
.media_blksize
;
693 *size
= (pinfo
.media_blocks
- pinfo
.reserved_blocks
);
699 disk_dumpconf(cdev_t dev
, u_int onoff
)
701 struct dumperinfo di
;
702 u_int64_t size
, blkno
;
707 return set_dumper(NULL
);
709 error
= disk_dumpcheck(dev
, &size
, &blkno
, &secsize
);
714 bzero(&di
, sizeof(struct dumperinfo
));
715 di
.dumper
= diskdump
;
717 di
.blocksize
= secsize
;
718 di
.mediaoffset
= blkno
* DEV_BSIZE
;
719 di
.mediasize
= size
* DEV_BSIZE
;
721 return set_dumper(&di
);
725 disk_unprobe(struct disk
*disk
)
730 disk_msg_send_sync(DISK_UNPROBE
, disk
, NULL
);
734 disk_invalidate (struct disk
*disk
)
736 dsgone(&disk
->d_slice
);
740 disk_enumerate(struct disk
*disk
)
744 lwkt_gettoken(&disklist_token
);
746 dp
= (LIST_FIRST(&disklist
));
748 dp
= (LIST_NEXT(disk
, d_list
));
749 lwkt_reltoken(&disklist_token
);
756 sysctl_disks(SYSCTL_HANDLER_ARGS
)
764 while ((disk
= disk_enumerate(disk
))) {
766 error
= SYSCTL_OUT(req
, " ", 1);
772 error
= SYSCTL_OUT(req
, disk
->d_rawdev
->si_name
,
773 strlen(disk
->d_rawdev
->si_name
));
777 error
= SYSCTL_OUT(req
, "", 1);
781 SYSCTL_PROC(_kern
, OID_AUTO
, disks
, CTLTYPE_STRING
| CTLFLAG_RD
, NULL
, 0,
782 sysctl_disks
, "A", "names of available disks");
785 * Open a disk device or partition.
789 diskopen(struct dev_open_args
*ap
)
791 cdev_t dev
= ap
->a_head
.a_dev
;
796 * dp can't be NULL here XXX.
798 * d_slice will be NULL if setdiskinfo() has not been called yet.
799 * setdiskinfo() is typically called whether the disk is present
800 * or not (e.g. CD), but the base disk device is created first
801 * and there may be a race.
804 if (dp
== NULL
|| dp
->d_slice
== NULL
)
809 * Deal with open races
812 while (dp
->d_flags
& DISKFLAG_LOCK
) {
813 dp
->d_flags
|= DISKFLAG_WANTED
;
814 error
= tsleep(dp
, PCATCH
, "diskopen", hz
);
820 dp
->d_flags
|= DISKFLAG_LOCK
;
823 * Open the underlying raw device.
825 if (!dsisopen(dp
->d_slice
)) {
827 if (!pdev
->si_iosize_max
)
828 pdev
->si_iosize_max
= dev
->si_iosize_max
;
830 error
= dev_dopen(dp
->d_rawdev
, ap
->a_oflags
,
831 ap
->a_devtype
, ap
->a_cred
);
835 * Inherit properties from the underlying device now that it is
843 error
= dsopen(dev
, ap
->a_devtype
, dp
->d_info
.d_dsflags
,
844 &dp
->d_slice
, &dp
->d_info
);
845 if (!dsisopen(dp
->d_slice
)) {
846 dev_dclose(dp
->d_rawdev
, ap
->a_oflags
, ap
->a_devtype
);
849 dp
->d_flags
&= ~DISKFLAG_LOCK
;
850 if (dp
->d_flags
& DISKFLAG_WANTED
) {
851 dp
->d_flags
&= ~DISKFLAG_WANTED
;
860 * Close a disk device or partition
864 diskclose(struct dev_close_args
*ap
)
866 cdev_t dev
= ap
->a_head
.a_dev
;
874 dsclose(dev
, ap
->a_devtype
, dp
->d_slice
);
875 if (!dsisopen(dp
->d_slice
)) {
876 error
= dev_dclose(dp
->d_rawdev
, ap
->a_fflag
, ap
->a_devtype
);
883 * First execute the ioctl on the disk device, and if it isn't supported
884 * try running it on the backing device.
888 diskioctl(struct dev_ioctl_args
*ap
)
890 cdev_t dev
= ap
->a_head
.a_dev
;
899 devfs_debug(DEVFS_DEBUG_DEBUG
,
900 "diskioctl: cmd is: %lx (name: %s)\n",
901 ap
->a_cmd
, dev
->si_name
);
902 devfs_debug(DEVFS_DEBUG_DEBUG
,
903 "diskioctl: &dp->d_slice is: %p, %p\n",
904 &dp
->d_slice
, dp
->d_slice
);
906 if (ap
->a_cmd
== DIOCGKERNELDUMP
) {
907 u
= *(u_int
*)ap
->a_data
;
908 return disk_dumpconf(dev
, u
);
911 if (&dp
->d_slice
== NULL
|| dp
->d_slice
== NULL
) {
915 error
= dsioctl(dev
, ap
->a_cmd
, ap
->a_data
, ap
->a_fflag
,
916 &dp
->d_slice
, &dp
->d_info
);
920 if (error
== ENOIOCTL
) {
921 error
= dev_dioctl(dp
->d_rawdev
, ap
->a_cmd
, ap
->a_data
,
922 ap
->a_fflag
, ap
->a_cred
, NULL
);
928 * Execute strategy routine
932 diskstrategy(struct dev_strategy_args
*ap
)
934 cdev_t dev
= ap
->a_head
.a_dev
;
935 struct bio
*bio
= ap
->a_bio
;
942 bio
->bio_buf
->b_error
= ENXIO
;
943 bio
->bio_buf
->b_flags
|= B_ERROR
;
947 KKASSERT(dev
->si_disk
== dp
);
950 * The dscheck() function will also transform the slice relative
951 * block number i.e. bio->bio_offset into a block number that can be
952 * passed directly to the underlying raw device. If dscheck()
953 * returns NULL it will have handled the bio for us (e.g. EOF
954 * or error due to being beyond the device size).
956 if ((nbio
= dscheck(dev
, bio
, dp
->d_slice
)) != NULL
) {
957 dsched_queue(dp
, nbio
);
965 * Return the partition size in ?blocks?
969 diskpsize(struct dev_psize_args
*ap
)
971 cdev_t dev
= ap
->a_head
.a_dev
;
977 ap
->a_result
= dssize(dev
, &dp
->d_slice
);
982 * When new device entries are instantiated, make sure they inherit our
983 * si_disk structure and block and iosize limits from the raw device.
985 * This routine is always called synchronously in the context of the
988 * XXX The various io and block size constraints are not always initialized
989 * properly by devices.
993 diskclone(struct dev_clone_args
*ap
)
995 cdev_t dev
= ap
->a_head
.a_dev
;
999 KKASSERT(dp
!= NULL
);
1001 dev
->si_iosize_max
= dp
->d_rawdev
->si_iosize_max
;
1002 dev
->si_bsize_phys
= dp
->d_rawdev
->si_bsize_phys
;
1003 dev
->si_bsize_best
= dp
->d_rawdev
->si_bsize_best
;
1008 diskdump(struct dev_dump_args
*ap
)
1010 cdev_t dev
= ap
->a_head
.a_dev
;
1011 struct disk
*dp
= dev
->si_disk
;
1012 u_int64_t size
, offset
;
1015 error
= disk_dumpcheck(dev
, &size
, &ap
->a_blkno
, &ap
->a_secsize
);
1016 /* XXX: this should probably go in disk_dumpcheck somehow */
1017 if (ap
->a_length
!= 0) {
1019 offset
= ap
->a_blkno
* DEV_BSIZE
;
1020 if ((ap
->a_offset
< offset
) ||
1021 (ap
->a_offset
+ ap
->a_length
- offset
> size
)) {
1022 kprintf("Attempt to write outside dump device boundaries.\n");
1028 ap
->a_head
.a_dev
= dp
->d_rawdev
;
1029 error
= dev_doperate(&ap
->a_head
);
1036 SYSCTL_INT(_debug_sizeof
, OID_AUTO
, diskslices
, CTLFLAG_RD
,
1037 0, sizeof(struct diskslices
), "sizeof(struct diskslices)");
1039 SYSCTL_INT(_debug_sizeof
, OID_AUTO
, disk
, CTLFLAG_RD
,
1040 0, sizeof(struct disk
), "sizeof(struct disk)");
1043 * Reorder interval for burst write allowance and minor write
1046 * We always want to trickle some writes in to make use of the
1047 * disk's zone cache. Bursting occurs on a longer interval and only
1048 * runningbufspace is well over the hirunningspace limit.
1050 int bioq_reorder_burst_interval
= 60; /* should be multiple of minor */
1051 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_burst_interval
,
1052 CTLFLAG_RW
, &bioq_reorder_burst_interval
, 0, "");
1053 int bioq_reorder_minor_interval
= 5;
1054 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_minor_interval
,
1055 CTLFLAG_RW
, &bioq_reorder_minor_interval
, 0, "");
1057 int bioq_reorder_burst_bytes
= 3000000;
1058 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_burst_bytes
,
1059 CTLFLAG_RW
, &bioq_reorder_burst_bytes
, 0, "");
1060 int bioq_reorder_minor_bytes
= 262144;
1061 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_minor_bytes
,
1062 CTLFLAG_RW
, &bioq_reorder_minor_bytes
, 0, "");
1066 * Order I/Os. Generally speaking this code is designed to make better
1067 * use of drive zone caches. A drive zone cache can typically track linear
1068 * reads or writes for around 16 zones simultaniously.
1070 * Read prioritization issues: It is possible for hundreds of megabytes worth
1071 * of writes to be queued asynchronously. This creates a huge bottleneck
1072 * for reads which reduce read bandwidth to a trickle.
1074 * To solve this problem we generally reorder reads before writes.
1076 * However, a large number of random reads can also starve writes and
1077 * make poor use of the drive zone cache so we allow writes to trickle
1081 bioqdisksort(struct bio_queue_head
*bioq
, struct bio
*bio
)
1084 * The BIO wants to be ordered. Adding to the tail also
1085 * causes transition to be set to NULL, forcing the ordering
1086 * of all prior I/O's.
1088 if (bio
->bio_buf
->b_flags
& B_ORDERED
) {
1089 bioq_insert_tail(bioq
, bio
);
1093 switch(bio
->bio_buf
->b_cmd
) {
1095 if (bioq
->transition
) {
1097 * Insert before the first write. Bleedover writes
1098 * based on reorder intervals to prevent starvation.
1100 TAILQ_INSERT_BEFORE(bioq
->transition
, bio
, bio_act
);
1102 if (bioq
->reorder
% bioq_reorder_minor_interval
== 0) {
1103 bioqwritereorder(bioq
);
1104 if (bioq
->reorder
>=
1105 bioq_reorder_burst_interval
) {
1111 * No writes queued (or ordering was forced),
1114 TAILQ_INSERT_TAIL(&bioq
->queue
, bio
, bio_act
);
1119 * Writes are always appended. If no writes were previously
1120 * queued or an ordered tail insertion occured the transition
1121 * field will be NULL.
1123 TAILQ_INSERT_TAIL(&bioq
->queue
, bio
, bio_act
);
1124 if (bioq
->transition
== NULL
)
1125 bioq
->transition
= bio
;
1129 * All other request types are forced to be ordered.
1131 bioq_insert_tail(bioq
, bio
);
1137 * Move the read-write transition point to prevent reads from
1138 * completely starving our writes. This brings a number of writes into
1139 * the fold every N reads.
1141 * We bring a few linear writes into the fold on a minor interval
1142 * and we bring a non-linear burst of writes into the fold on a major
1143 * interval. Bursting only occurs if runningbufspace is really high
1144 * (typically from syncs, fsyncs, or HAMMER flushes).
1148 bioqwritereorder(struct bio_queue_head
*bioq
)
1156 if (bioq
->reorder
< bioq_reorder_burst_interval
||
1157 !buf_runningbufspace_severe()) {
1158 left
= (size_t)bioq_reorder_minor_bytes
;
1161 left
= (size_t)bioq_reorder_burst_bytes
;
1165 next_offset
= bioq
->transition
->bio_offset
;
1166 while ((bio
= bioq
->transition
) != NULL
&&
1167 (check_off
== 0 || next_offset
== bio
->bio_offset
)
1169 n
= bio
->bio_buf
->b_bcount
;
1170 next_offset
= bio
->bio_offset
+ n
;
1171 bioq
->transition
= TAILQ_NEXT(bio
, bio_act
);
1179 * Bounds checking against the media size, used for the raw partition.
1180 * secsize, mediasize and b_blkno must all be the same units.
1181 * Possibly this has to be DEV_BSIZE (512).
1184 bounds_check_with_mediasize(struct bio
*bio
, int secsize
, uint64_t mediasize
)
1186 struct buf
*bp
= bio
->bio_buf
;
1189 sz
= howmany(bp
->b_bcount
, secsize
);
1191 if (bio
->bio_offset
/DEV_BSIZE
+ sz
> mediasize
) {
1192 sz
= mediasize
- bio
->bio_offset
/DEV_BSIZE
;
1194 /* If exactly at end of disk, return EOF. */
1195 bp
->b_resid
= bp
->b_bcount
;
1199 /* If past end of disk, return EINVAL. */
1200 bp
->b_error
= EINVAL
;
1203 /* Otherwise, truncate request. */
1204 bp
->b_bcount
= sz
* secsize
;
1211 * Disk error is the preface to plaintive error messages
1212 * about failing disk transfers. It prints messages of the form
1214 hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d)
1216 * if the offset of the error in the transfer and a disk label
1217 * are both available. blkdone should be -1 if the position of the error
1218 * is unknown; the disklabel pointer may be null from drivers that have not
1219 * been converted to use them. The message is printed with kprintf
1220 * if pri is LOG_PRINTF, otherwise it uses log at the specified priority.
1221 * The message should be completed (with at least a newline) with kprintf
1222 * or log(-1, ...), respectively. There is no trailing space.
1225 diskerr(struct bio
*bio
, cdev_t dev
, const char *what
, int pri
, int donecnt
)
1227 struct buf
*bp
= bio
->bio_buf
;
1241 kprintf("%s: %s %sing ", dev
->si_name
, what
, term
);
1242 kprintf("offset %012llx for %d",
1243 (long long)bio
->bio_offset
,
1247 kprintf(" (%d bytes completed)", donecnt
);
1251 * Locate a disk device
1254 disk_locate(const char *devname
)
1256 return devfs_find_device_by_name(devname
);
1260 disk_config(void *arg
)
1262 disk_msg_send_sync(DISK_SYNC
, NULL
, NULL
);
1268 struct thread
* td_core
;
1270 disk_msg_cache
= objcache_create("disk-msg-cache", 0, 0,
1272 objcache_malloc_alloc
,
1273 objcache_malloc_free
,
1274 &disk_msg_malloc_args
);
1276 lwkt_token_init(&disklist_token
, 1, "disks");
1279 * Initialize the reply-only port which acts as a message drain
1281 lwkt_initport_replyonly(&disk_dispose_port
, disk_msg_autofree_reply
);
1283 lwkt_gettoken(&disklist_token
);
1284 lwkt_create(disk_msg_core
, /*args*/NULL
, &td_core
, NULL
,
1285 0, 0, "disk_msg_core");
1286 tsleep(td_core
, 0, "diskcore", 0);
1287 lwkt_reltoken(&disklist_token
);
1293 objcache_destroy(disk_msg_cache
);
1297 * Clean out illegal characters in serial numbers.
1300 disk_cleanserial(char *serno
)
1304 while ((c
= *serno
) != 0) {
1305 if (c
>= 'a' && c
<= 'z')
1307 else if (c
>= 'A' && c
<= 'Z')
1309 else if (c
>= '0' && c
<= '9')
1311 else if (c
== '-' || c
== '@' || c
== '+' || c
== '.')
1319 TUNABLE_INT("kern.disk_debug", &disk_debug_enable
);
1320 SYSCTL_INT(_kern
, OID_AUTO
, disk_debug
, CTLFLAG_RW
, &disk_debug_enable
,
1321 0, "Enable subr_disk debugging");
1323 SYSINIT(disk_register
, SI_SUB_PRE_DRIVERS
, SI_ORDER_FIRST
, disk_init
, NULL
);
1324 SYSUNINIT(disk_register
, SI_SUB_PRE_DRIVERS
, SI_ORDER_ANY
, disk_uninit
, NULL
);