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>
6 * and Alex Hornung <ahornung@gmail.com>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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35 * ----------------------------------------------------------------------------
36 * "THE BEER-WARE LICENSE" (Revision 42):
37 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
38 * can do whatever you want with this stuff. If we meet some day, and you think
39 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
40 * ----------------------------------------------------------------------------
42 * Copyright (c) 1982, 1986, 1988, 1993
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45 * All or some portions of this file are derived from material licensed
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47 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
48 * the permission of UNIX System Laboratories, Inc.
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51 * modification, are permitted provided that the following conditions
53 * 1. Redistributions of source code must retain the above copyright
54 * notice, this list of conditions and the following disclaimer.
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58 * 3. Neither the name of the University nor the names of its contributors
59 * may be used to endorse or promote products derived from this software
60 * without specific prior written permission.
62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94
75 * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $
76 * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $
79 #include <sys/param.h>
80 #include <sys/systm.h>
81 #include <sys/kernel.h>
83 #include <sys/sysctl.h>
86 #include <sys/disklabel.h>
87 #include <sys/disklabel32.h>
88 #include <sys/disklabel64.h>
89 #include <sys/diskslice.h>
90 #include <sys/diskmbr.h>
92 #include <sys/kerneldump.h>
93 #include <sys/malloc.h>
94 #include <machine/md_var.h>
95 #include <sys/ctype.h>
96 #include <sys/syslog.h>
97 #include <sys/device.h>
98 #include <sys/msgport.h>
99 #include <sys/devfs.h>
100 #include <sys/thread.h>
101 #include <sys/dsched.h>
102 #include <sys/queue.h>
103 #include <sys/lock.h>
104 #include <sys/udev.h>
105 #include <sys/uuid.h>
107 #include <sys/buf2.h>
108 #include <sys/msgport2.h>
109 #include <sys/thread2.h>
111 static MALLOC_DEFINE(M_DISK
, "disk", "disk data");
112 static int disk_debug_enable
= 0;
114 static void disk_msg_autofree_reply(lwkt_port_t
, lwkt_msg_t
);
115 static void disk_msg_core(void *);
116 static int disk_probe_slice(struct disk
*dp
, cdev_t dev
, int slice
, int reprobe
);
117 static void disk_probe(struct disk
*dp
, int reprobe
);
118 static void _setdiskinfo(struct disk
*disk
, struct disk_info
*info
);
119 static void bioqwritereorder(struct bio_queue_head
*bioq
);
120 static void disk_cleanserial(char *serno
);
121 static int disk_debug(int, char *, ...) __printflike(2, 3);
122 static cdev_t
_disk_create_named(const char *name
, int unit
, struct disk
*dp
,
123 struct dev_ops
*raw_ops
, int clone
);
125 static d_open_t diskopen
;
126 static d_close_t diskclose
;
127 static d_ioctl_t diskioctl
;
128 static d_strategy_t diskstrategy
;
129 static d_psize_t diskpsize
;
130 static d_dump_t diskdump
;
132 static LIST_HEAD(, disk
) disklist
= LIST_HEAD_INITIALIZER(&disklist
);
133 static struct lwkt_token disklist_token
;
134 static struct lwkt_token ds_token
;
136 static struct dev_ops disk1_ops
= {
137 { "disk", 0, D_DISK
| D_MPSAFE
| D_TRACKCLOSE
| D_KVABIO
},
139 .d_close
= diskclose
,
141 .d_write
= physwrite
,
142 .d_ioctl
= diskioctl
,
143 .d_strategy
= diskstrategy
,
145 .d_psize
= diskpsize
,
148 static struct dev_ops disk2_ops
= {
149 { "disk", 0, D_DISK
| D_MPSAFE
| D_TRACKCLOSE
| D_KVABIO
|
152 .d_close
= diskclose
,
154 .d_write
= physwrite
,
155 .d_ioctl
= diskioctl
,
156 .d_strategy
= diskstrategy
,
158 .d_psize
= diskpsize
,
161 static struct objcache
*disk_msg_cache
;
163 struct objcache_malloc_args disk_msg_malloc_args
= {
164 sizeof(struct disk_msg
), M_DISK
};
166 static struct lwkt_port disk_dispose_port
;
167 static struct lwkt_port disk_msg_port
;
170 disk_debug(int level
, char *fmt
, ...)
175 if (level
<= disk_debug_enable
)
183 disk_probe_slice(struct disk
*dp
, cdev_t dev
, int slice
, int reprobe
)
185 struct disk_info
*info
= &dp
->d_info
;
186 struct diskslice
*sp
= &dp
->d_slice
->dss_slices
[slice
];
188 struct dev_ops
*dops
;
189 struct partinfo part
;
196 disk_debug(2, "disk_probe_slice (begin): %s (%s)\n",
197 dev
->si_name
, dp
->d_cdev
->si_name
);
199 sno
= slice
? slice
- 1 : 0;
200 dops
= (dp
->d_rawdev
->si_ops
->head
.flags
& D_NOEMERGPGR
) ?
201 &disk2_ops
: &disk1_ops
;
203 ops
= &disklabel32_ops
;
204 msg
= ops
->op_readdisklabel(dev
, sp
, &sp
->ds_label
, info
);
205 if (msg
&& !strcmp(msg
, "no disk label")) {
206 ops
= &disklabel64_ops
;
207 msg
= ops
->op_readdisklabel(dev
, sp
, &sp
->ds_label
, info
);
211 if (slice
!= WHOLE_DISK_SLICE
)
212 ops
->op_adjust_label_reserved(dp
->d_slice
, slice
, sp
);
217 for (i
= 0; i
< ops
->op_getnumparts(sp
->ds_label
); i
++) {
218 ops
->op_loadpartinfo(sp
->ds_label
, i
, &part
);
221 (ndev
= devfs_find_device_by_name("%s%c",
222 dev
->si_name
, 'a' + i
))
225 * Device already exists and
228 ndev
->si_flags
|= SI_REPROBE_TEST
;
231 * Destroy old UUID alias
233 destroy_dev_alias(ndev
, "part-by-uuid/*");
235 /* Create UUID alias */
236 if (!kuuid_is_nil(&part
.storage_uuid
)) {
237 snprintf_uuid(uuid_buf
,
243 udev_dict_set_cstr(ndev
, "uuid", uuid_buf
);
246 ndev
= make_dev_covering(dops
,
247 dp
->d_rawdev
->si_ops
,
248 dkmakeminor(dkunit(dp
->d_cdev
),
250 UID_ROOT
, GID_OPERATOR
, 0640,
251 "%s%c", dev
->si_name
, 'a'+ i
);
252 ndev
->si_parent
= dev
;
253 ndev
->si_iosize_max
= dev
->si_iosize_max
;
255 udev_dict_set_cstr(ndev
, "subsystem", "disk");
256 /* Inherit parent's disk type */
257 if (dp
->d_disktype
) {
258 udev_dict_set_cstr(ndev
, "disk-type",
259 __DECONST(char *, dp
->d_disktype
));
262 /* Create serno alias */
263 if (dp
->d_info
.d_serialno
) {
266 dp
->d_info
.d_serialno
,
270 /* Create UUID alias */
271 if (!kuuid_is_nil(&part
.storage_uuid
)) {
272 snprintf_uuid(uuid_buf
,
278 udev_dict_set_cstr(ndev
, "uuid", uuid_buf
);
280 ndev
->si_flags
|= SI_REPROBE_TEST
;
284 } else if (info
->d_dsflags
& DSO_COMPATLABEL
) {
286 if (sp
->ds_size
>= 0x100000000ULL
)
287 ops
= &disklabel64_ops
;
289 ops
= &disklabel32_ops
;
290 sp
->ds_label
= ops
->op_clone_label(info
, sp
);
292 if (sp
->ds_type
== DOSPTYP_386BSD
|| /* XXX */
293 sp
->ds_type
== DOSPTYP_NETBSD
||
294 sp
->ds_type
== DOSPTYP_OPENBSD
||
295 sp
->ds_type
== DOSPTYP_DFLYBSD
) {
296 log(LOG_WARNING
, "%s: cannot find label (%s)\n",
300 if (sp
->ds_label
.opaque
!= NULL
&& sp
->ds_ops
!= NULL
) {
301 /* Clear out old label - it's not around anymore */
303 "disk_probe_slice: clear out old diskabel on %s\n",
306 sp
->ds_ops
->op_freedisklabel(&sp
->ds_label
);
312 sp
->ds_wlabel
= FALSE
;
315 return (msg
? EINVAL
: 0);
319 * This routine is only called for newly minted drives or to reprobe
320 * a drive with no open slices. disk_probe_slice() is called directly
321 * when reprobing partition changes within slices.
324 disk_probe(struct disk
*dp
, int reprobe
)
326 struct disk_info
*info
= &dp
->d_info
;
327 cdev_t dev
= dp
->d_cdev
;
330 struct diskslices
*osp
;
331 struct diskslice
*sp
;
332 struct dev_ops
*dops
;
335 KKASSERT (info
->d_media_blksize
!= 0);
338 dp
->d_slice
= dsmakeslicestruct(BASE_SLICE
, info
);
339 disk_debug(1, "disk_probe (begin): %s\n", dp
->d_cdev
->si_name
);
341 error
= mbrinit(dev
, info
, &(dp
->d_slice
));
347 dops
= (dp
->d_rawdev
->si_ops
->head
.flags
& D_NOEMERGPGR
) ?
348 &disk2_ops
: &disk1_ops
;
350 for (i
= 0; i
< dp
->d_slice
->dss_nslices
; i
++) {
352 * Ignore the whole-disk slice, it has already been created.
354 if (i
== WHOLE_DISK_SLICE
)
359 * Ignore the compatibility slice s0 if it's a device mapper
362 if ((i
== COMPATIBILITY_SLICE
) &&
363 (info
->d_dsflags
& DSO_DEVICEMAPPER
))
367 sp
= &dp
->d_slice
->dss_slices
[i
];
370 * Handle s0. s0 is a compatibility slice if there are no
371 * other slices and it has not otherwise been set up, else
374 if (i
== COMPATIBILITY_SLICE
) {
376 if (sp
->ds_type
== 0 &&
377 dp
->d_slice
->dss_nslices
== BASE_SLICE
) {
378 sp
->ds_size
= info
->d_media_blocks
;
387 * Ignore 0-length slices
389 if (sp
->ds_size
== 0)
393 (ndev
= devfs_find_device_by_name("%ss%d",
394 dev
->si_name
, sno
))) {
396 * Device already exists and is still valid
398 ndev
->si_flags
|= SI_REPROBE_TEST
;
401 * Destroy old UUID alias
403 destroy_dev_alias(ndev
, "slice-by-uuid/*");
405 /* Create UUID alias */
406 if (!kuuid_is_nil(&sp
->ds_stor_uuid
)) {
407 snprintf_uuid(uuid_buf
, sizeof(uuid_buf
),
409 make_dev_alias(ndev
, "slice-by-uuid/%s",
414 * Else create new device
416 ndev
= make_dev_covering(dops
, dp
->d_rawdev
->si_ops
,
417 dkmakewholeslice(dkunit(dev
), i
),
418 UID_ROOT
, GID_OPERATOR
, 0640,
419 (info
->d_dsflags
& DSO_DEVICEMAPPER
)?
420 "%s.s%d" : "%ss%d", dev
->si_name
, sno
);
421 ndev
->si_parent
= dev
;
422 ndev
->si_iosize_max
= dev
->si_iosize_max
;
423 udev_dict_set_cstr(ndev
, "subsystem", "disk");
424 /* Inherit parent's disk type */
425 if (dp
->d_disktype
) {
426 udev_dict_set_cstr(ndev
, "disk-type",
427 __DECONST(char *, dp
->d_disktype
));
430 /* Create serno alias */
431 if (dp
->d_info
.d_serialno
) {
432 make_dev_alias(ndev
, "serno/%s.s%d",
433 dp
->d_info
.d_serialno
, sno
);
436 /* Create UUID alias */
437 if (!kuuid_is_nil(&sp
->ds_stor_uuid
)) {
438 snprintf_uuid(uuid_buf
, sizeof(uuid_buf
),
440 make_dev_alias(ndev
, "slice-by-uuid/%s",
445 ndev
->si_flags
|= SI_REPROBE_TEST
;
450 * Probe appropriate slices for a disklabel
452 * XXX slice type 1 used by our gpt probe code.
453 * XXX slice type 0 used by mbr compat slice.
455 if (sp
->ds_type
== DOSPTYP_386BSD
||
456 sp
->ds_type
== DOSPTYP_NETBSD
||
457 sp
->ds_type
== DOSPTYP_OPENBSD
||
458 sp
->ds_type
== DOSPTYP_DFLYBSD
||
461 if (dp
->d_slice
->dss_first_bsd_slice
== 0)
462 dp
->d_slice
->dss_first_bsd_slice
= i
;
463 disk_probe_slice(dp
, ndev
, i
, reprobe
);
467 disk_debug(1, "disk_probe (end): %s\n", dp
->d_cdev
->si_name
);
472 disk_msg_core(void *arg
)
475 struct diskslice
*sp
;
479 lwkt_gettoken(&disklist_token
);
480 lwkt_initport_thread(&disk_msg_port
, curthread
);
481 wakeup(curthread
); /* synchronous startup */
482 lwkt_reltoken(&disklist_token
);
484 lwkt_gettoken(&ds_token
);
488 msg
= (disk_msg_t
)lwkt_waitport(&disk_msg_port
, 0);
490 switch (msg
->hdr
.u
.ms_result
) {
491 case DISK_DISK_PROBE
:
492 dp
= (struct disk
*)msg
->load
;
494 "DISK_DISK_PROBE: %s\n",
495 dp
->d_cdev
->si_name
);
496 disk_iocom_update(dp
);
499 case DISK_DISK_DESTROY
:
500 dp
= (struct disk
*)msg
->load
;
502 "DISK_DISK_DESTROY: %s\n",
503 dp
->d_cdev
->si_name
);
504 disk_iocom_uninit(dp
);
507 * Interlock against struct disk enumerations.
508 * Wait for enumerations to complete then remove
509 * the dp from the list before tearing it down.
510 * This avoids numerous races.
512 lwkt_gettoken(&disklist_token
);
514 tsleep(&dp
->d_refs
, 0, "diskdel", hz
/ 10);
515 LIST_REMOVE(dp
, d_list
);
517 dsched_disk_destroy(dp
);
518 devfs_destroy_related(dp
->d_cdev
);
519 destroy_dev(dp
->d_cdev
);
520 destroy_only_dev(dp
->d_rawdev
);
522 lwkt_reltoken(&disklist_token
);
524 if (dp
->d_info
.d_serialno
) {
525 kfree(dp
->d_info
.d_serialno
, M_TEMP
);
526 dp
->d_info
.d_serialno
= NULL
;
530 dp
= (struct disk
*)msg
->load
;
532 "DISK_DISK_UNPROBE: %s\n",
533 dp
->d_cdev
->si_name
);
534 devfs_destroy_related(dp
->d_cdev
);
536 case DISK_SLICE_REPROBE
:
537 dp
= (struct disk
*)msg
->load
;
538 sp
= (struct diskslice
*)msg
->load2
;
539 devfs_clr_related_flag(sp
->ds_dev
,
542 "DISK_SLICE_REPROBE: %s\n",
543 sp
->ds_dev
->si_name
);
544 disk_probe_slice(dp
, sp
->ds_dev
,
545 dkslice(sp
->ds_dev
), 1);
546 devfs_destroy_related_without_flag(
547 sp
->ds_dev
, SI_REPROBE_TEST
);
549 case DISK_DISK_REPROBE
:
550 dp
= (struct disk
*)msg
->load
;
551 devfs_clr_related_flag(dp
->d_cdev
, SI_REPROBE_TEST
);
553 "DISK_DISK_REPROBE: %s\n",
554 dp
->d_cdev
->si_name
);
556 devfs_destroy_related_without_flag(
557 dp
->d_cdev
, SI_REPROBE_TEST
);
560 disk_debug(1, "DISK_SYNC\n");
563 devfs_debug(DEVFS_DEBUG_WARNING
,
564 "disk_msg_core: unknown message "
565 "received at core\n");
568 lwkt_replymsg(&msg
->hdr
, 0);
570 lwkt_reltoken(&ds_token
);
576 * Acts as a message drain. Any message that is replied to here gets
577 * destroyed and the memory freed.
580 disk_msg_autofree_reply(lwkt_port_t port
, lwkt_msg_t msg
)
582 objcache_put(disk_msg_cache
, msg
);
587 disk_msg_send(uint32_t cmd
, void *load
, void *load2
)
590 lwkt_port_t port
= &disk_msg_port
;
592 disk_msg
= objcache_get(disk_msg_cache
, M_WAITOK
);
594 lwkt_initmsg(&disk_msg
->hdr
, &disk_dispose_port
, 0);
596 disk_msg
->hdr
.u
.ms_result
= cmd
;
597 disk_msg
->load
= load
;
598 disk_msg
->load2
= load2
;
600 lwkt_sendmsg(port
, &disk_msg
->hdr
);
604 disk_msg_send_sync(uint32_t cmd
, void *load
, void *load2
)
606 struct lwkt_port rep_port
;
610 disk_msg
= objcache_get(disk_msg_cache
, M_WAITOK
);
611 port
= &disk_msg_port
;
613 /* XXX could probably use curthread's built-in msgport */
614 lwkt_initport_thread(&rep_port
, curthread
);
615 lwkt_initmsg(&disk_msg
->hdr
, &rep_port
, 0);
617 disk_msg
->hdr
.u
.ms_result
= cmd
;
618 disk_msg
->load
= load
;
619 disk_msg
->load2
= load2
;
621 lwkt_domsg(port
, &disk_msg
->hdr
, 0);
622 objcache_put(disk_msg_cache
, disk_msg
);
626 * Create a raw device for the dev_ops template (which is returned). Also
627 * create a slice and unit managed disk and overload the user visible
628 * device space with it.
630 * NOTE: The returned raw device is NOT a slice and unit managed device.
631 * It is an actual raw device representing the raw disk as specified by
632 * the passed dev_ops. The disk layer not only returns such a raw device,
633 * it also uses it internally when passing (modified) commands through.
636 disk_create(int unit
, struct disk
*dp
, struct dev_ops
*raw_ops
)
638 return _disk_create_named(NULL
, unit
, dp
, raw_ops
, 0);
642 disk_create_clone(int unit
, struct disk
*dp
,
643 struct dev_ops
*raw_ops
)
645 return _disk_create_named(NULL
, unit
, dp
, raw_ops
, 1);
649 disk_create_named(const char *name
, int unit
, struct disk
*dp
,
650 struct dev_ops
*raw_ops
)
652 return _disk_create_named(name
, unit
, dp
, raw_ops
, 0);
656 disk_create_named_clone(const char *name
, int unit
, struct disk
*dp
,
657 struct dev_ops
*raw_ops
)
659 return _disk_create_named(name
, unit
, dp
, raw_ops
, 1);
663 _disk_create_named(const char *name
, int unit
, struct disk
*dp
,
664 struct dev_ops
*raw_ops
, int clone
)
667 struct dev_ops
*dops
;
669 disk_debug(1, "disk_create (begin): %s%d\n", name
, unit
);
672 rawdev
= make_only_dev(raw_ops
, dkmakewholedisk(unit
),
673 UID_ROOT
, GID_OPERATOR
, 0640, "%s", name
);
675 rawdev
= make_only_dev(raw_ops
, dkmakewholedisk(unit
),
676 UID_ROOT
, GID_OPERATOR
, 0640,
677 "%s%d", raw_ops
->head
.name
, unit
);
680 bzero(dp
, sizeof(*dp
));
682 dops
= (raw_ops
->head
.flags
& D_NOEMERGPGR
) ? &disk2_ops
: &disk1_ops
;
684 dp
->d_rawdev
= rawdev
;
685 dp
->d_raw_ops
= raw_ops
;
686 dp
->d_dev_ops
= dops
;
690 dp
->d_cdev
= make_only_dev_covering(
691 dops
, dp
->d_rawdev
->si_ops
,
692 dkmakewholedisk(unit
),
693 UID_ROOT
, GID_OPERATOR
, 0640,
696 dp
->d_cdev
= make_dev_covering(
697 dops
, dp
->d_rawdev
->si_ops
,
698 dkmakewholedisk(unit
),
699 UID_ROOT
, GID_OPERATOR
, 0640,
704 dp
->d_cdev
= make_only_dev_covering(
705 dops
, dp
->d_rawdev
->si_ops
,
706 dkmakewholedisk(unit
),
707 UID_ROOT
, GID_OPERATOR
, 0640,
708 "%s%d", raw_ops
->head
.name
, unit
);
710 dp
->d_cdev
= make_dev_covering(
711 dops
, dp
->d_rawdev
->si_ops
,
712 dkmakewholedisk(unit
),
713 UID_ROOT
, GID_OPERATOR
, 0640,
714 "%s%d", raw_ops
->head
.name
, unit
);
718 udev_dict_set_cstr(dp
->d_cdev
, "subsystem", "disk");
719 dp
->d_cdev
->si_disk
= dp
;
722 dsched_disk_create(dp
, name
, unit
);
724 dsched_disk_create(dp
, raw_ops
->head
.name
, unit
);
726 lwkt_gettoken(&disklist_token
);
727 LIST_INSERT_HEAD(&disklist
, dp
, d_list
);
728 lwkt_reltoken(&disklist_token
);
732 disk_debug(1, "disk_create (end): %s%d\n",
733 (name
!= NULL
)?(name
):(raw_ops
->head
.name
), unit
);
735 return (dp
->d_rawdev
);
739 disk_setdisktype(struct disk
*disk
, const char *type
)
743 KKASSERT(disk
!= NULL
);
745 disk
->d_disktype
= type
;
746 error
= udev_dict_set_cstr(disk
->d_cdev
, "disk-type",
747 __DECONST(char *, type
));
752 disk_getopencount(struct disk
*disk
)
754 return disk
->d_opencount
;
758 _setdiskinfo(struct disk
*disk
, struct disk_info
*info
)
762 oldserialno
= disk
->d_info
.d_serialno
;
763 bcopy(info
, &disk
->d_info
, sizeof(disk
->d_info
));
764 info
= &disk
->d_info
;
766 disk_debug(1, "_setdiskinfo: %s\n", disk
->d_cdev
->si_name
);
769 * The serial number is duplicated so the caller can throw
772 if (info
->d_serialno
&& info
->d_serialno
[0] &&
773 (info
->d_serialno
[0] != ' ' || strlen(info
->d_serialno
) > 1)) {
774 info
->d_serialno
= kstrdup(info
->d_serialno
, M_TEMP
);
775 disk_cleanserial(info
->d_serialno
);
777 make_dev_alias(disk
->d_cdev
, "serno/%s",
781 info
->d_serialno
= NULL
;
784 kfree(oldserialno
, M_TEMP
);
786 dsched_disk_update(disk
, info
);
789 * The caller may set d_media_size or d_media_blocks and we
790 * calculate the other.
792 KKASSERT(info
->d_media_size
== 0 || info
->d_media_blocks
== 0);
793 if (info
->d_media_size
== 0 && info
->d_media_blocks
) {
794 info
->d_media_size
= (u_int64_t
)info
->d_media_blocks
*
795 info
->d_media_blksize
;
796 } else if (info
->d_media_size
&& info
->d_media_blocks
== 0 &&
797 info
->d_media_blksize
) {
798 info
->d_media_blocks
= info
->d_media_size
/
799 info
->d_media_blksize
;
803 * The si_* fields for rawdev are not set until after the
804 * disk_create() call, so someone using the cooked version
805 * of the raw device (i.e. da0s0) will not get the right
806 * si_iosize_max unless we fix it up here.
808 if (disk
->d_cdev
&& disk
->d_rawdev
&&
809 disk
->d_cdev
->si_iosize_max
== 0) {
810 disk
->d_cdev
->si_iosize_max
= disk
->d_rawdev
->si_iosize_max
;
811 disk
->d_cdev
->si_bsize_phys
= disk
->d_rawdev
->si_bsize_phys
;
812 disk
->d_cdev
->si_bsize_best
= disk
->d_rawdev
->si_bsize_best
;
815 /* Add the serial number to the udev_dictionary */
816 if (info
->d_serialno
)
817 udev_dict_set_cstr(disk
->d_cdev
, "serno", info
->d_serialno
);
821 * Disk drivers must call this routine when media parameters are available
825 disk_setdiskinfo(struct disk
*disk
, struct disk_info
*info
)
827 _setdiskinfo(disk
, info
);
828 disk_msg_send(DISK_DISK_PROBE
, disk
, NULL
);
829 disk_debug(1, "disk_setdiskinfo: sent probe for %s\n",
830 disk
->d_cdev
->si_name
);
834 disk_setdiskinfo_sync(struct disk
*disk
, struct disk_info
*info
)
836 _setdiskinfo(disk
, info
);
837 disk_msg_send_sync(DISK_DISK_PROBE
, disk
, NULL
);
838 disk_debug(1, "disk_setdiskinfo_sync: sent probe for %s\n",
839 disk
->d_cdev
->si_name
);
843 * This routine is called when an adapter detaches. The higher level
844 * managed disk device is destroyed while the lower level raw device is
848 disk_destroy(struct disk
*disk
)
850 disk_msg_send_sync(DISK_DISK_DESTROY
, disk
, NULL
);
855 disk_dumpcheck(cdev_t dev
, u_int64_t
*size
,
856 u_int64_t
*blkno
, u_int32_t
*secsize
)
858 struct partinfo pinfo
;
862 *size
= 0; /* avoid gcc warnings */
864 *secsize
= 512; /* avoid gcc warnings */
865 bzero(&pinfo
, sizeof(pinfo
));
867 error
= dev_dioctl(dev
, DIOCGPART
, (void *)&pinfo
, 0,
868 proc0
.p_ucred
, NULL
, NULL
);
872 if (pinfo
.media_blksize
== 0)
875 if (blkno
) /* XXX: make sure this reserved stuff is right */
876 *blkno
= pinfo
.reserved_blocks
+
877 pinfo
.media_offset
/ pinfo
.media_blksize
;
879 *secsize
= pinfo
.media_blksize
;
881 *size
= (pinfo
.media_blocks
- pinfo
.reserved_blocks
);
887 disk_dumpconf(cdev_t dev
, u_int onoff
)
889 struct dumperinfo di
;
890 u_int64_t size
, blkno
;
895 return set_dumper(NULL
);
897 error
= disk_dumpcheck(dev
, &size
, &blkno
, &secsize
);
902 bzero(&di
, sizeof(struct dumperinfo
));
903 di
.dumper
= diskdump
;
905 di
.blocksize
= secsize
;
906 di
.maxiosize
= dev
->si_iosize_max
;
907 di
.mediaoffset
= blkno
* DEV_BSIZE
;
908 di
.mediasize
= size
* DEV_BSIZE
;
910 return set_dumper(&di
);
914 disk_unprobe(struct disk
*disk
)
919 disk_msg_send_sync(DISK_UNPROBE
, disk
, NULL
);
923 disk_invalidate (struct disk
*disk
)
925 dsgone(&disk
->d_slice
);
929 * Enumerate disks, pass a marker and an initial NULL dp to initialize,
930 * then loop with the previously returned dp.
932 * The returned dp will be referenced, preventing its destruction. When
933 * you pass the returned dp back into the loop the ref is dropped.
935 * WARNING: If terminating your loop early you must call
936 * disk_enumerate_stop().
939 disk_enumerate(struct disk
*marker
, struct disk
*dp
)
941 lwkt_gettoken(&disklist_token
);
944 dp
= LIST_NEXT(marker
, d_list
);
945 LIST_REMOVE(marker
, d_list
);
947 bzero(marker
, sizeof(*marker
));
948 marker
->d_flags
= DISKFLAG_MARKER
;
949 dp
= LIST_FIRST(&disklist
);
952 if ((dp
->d_flags
& DISKFLAG_MARKER
) == 0)
954 dp
= LIST_NEXT(dp
, d_list
);
958 LIST_INSERT_AFTER(dp
, marker
, d_list
);
960 lwkt_reltoken(&disklist_token
);
965 * Terminate an enumeration early. Do not call this function if the
966 * enumeration ended normally. dp can be NULL, indicating that you
967 * wish to retain the ref count on dp.
969 * This function removes the marker.
972 disk_enumerate_stop(struct disk
*marker
, struct disk
*dp
)
974 lwkt_gettoken(&disklist_token
);
975 LIST_REMOVE(marker
, d_list
);
978 lwkt_reltoken(&disklist_token
);
983 sysctl_disks(SYSCTL_HANDLER_ARGS
)
993 while ((dp
= disk_enumerate(&marker
, dp
))) {
995 error
= SYSCTL_OUT(req
, " ", 1);
997 disk_enumerate_stop(&marker
, dp
);
1003 error
= SYSCTL_OUT(req
, dp
->d_rawdev
->si_name
,
1004 strlen(dp
->d_rawdev
->si_name
));
1006 disk_enumerate_stop(&marker
, dp
);
1011 error
= SYSCTL_OUT(req
, "", 1);
1015 SYSCTL_PROC(_kern
, OID_AUTO
, disks
, CTLTYPE_STRING
| CTLFLAG_RD
, NULL
, 0,
1016 sysctl_disks
, "A", "names of available disks");
1019 * Open a disk device or partition.
1023 diskopen(struct dev_open_args
*ap
)
1025 cdev_t dev
= ap
->a_head
.a_dev
;
1030 * dp can't be NULL here XXX.
1032 * d_slice will be NULL if setdiskinfo() has not been called yet.
1033 * setdiskinfo() is typically called whether the disk is present
1034 * or not (e.g. CD), but the base disk device is created first
1035 * and there may be a race.
1038 if (dp
== NULL
|| dp
->d_slice
== NULL
)
1043 * Deal with open races
1045 lwkt_gettoken(&ds_token
);
1046 while (dp
->d_flags
& DISKFLAG_LOCK
) {
1047 dp
->d_flags
|= DISKFLAG_WANTED
;
1048 error
= tsleep(dp
, PCATCH
, "diskopen", hz
);
1050 lwkt_reltoken(&ds_token
);
1054 dp
->d_flags
|= DISKFLAG_LOCK
;
1057 * Open the underlying raw device.
1059 if (!dsisopen(dp
->d_slice
)) {
1061 if (!pdev
->si_iosize_max
)
1062 pdev
->si_iosize_max
= dev
->si_iosize_max
;
1064 error
= dev_dopen(dp
->d_rawdev
, ap
->a_oflags
,
1065 ap
->a_devtype
, ap
->a_cred
, NULL
);
1070 error
= dsopen(dev
, ap
->a_devtype
, dp
->d_info
.d_dsflags
,
1071 &dp
->d_slice
, &dp
->d_info
);
1072 if (!dsisopen(dp
->d_slice
)) {
1073 dev_dclose(dp
->d_rawdev
, ap
->a_oflags
, ap
->a_devtype
, NULL
);
1076 dp
->d_flags
&= ~DISKFLAG_LOCK
;
1077 if (dp
->d_flags
& DISKFLAG_WANTED
) {
1078 dp
->d_flags
&= ~DISKFLAG_WANTED
;
1081 lwkt_reltoken(&ds_token
);
1083 KKASSERT(dp
->d_opencount
>= 0);
1084 /* If the open was successful, bump open count */
1086 atomic_add_int(&dp
->d_opencount
, 1);
1092 * Close a disk device or partition
1096 diskclose(struct dev_close_args
*ap
)
1098 cdev_t dev
= ap
->a_head
.a_dev
;
1107 * The cdev_t represents the disk/slice/part. The shared
1108 * dp structure governs all cdevs associated with the disk.
1110 * As a safety only close the underlying raw device on the last
1111 * close the disk device if our tracking of the slices/partitions
1112 * also indicates nothing is open.
1114 KKASSERT(dp
->d_opencount
>= 1);
1115 lcount
= atomic_fetchadd_int(&dp
->d_opencount
, -1);
1117 lwkt_gettoken(&ds_token
);
1118 dsclose(dev
, ap
->a_devtype
, dp
->d_slice
);
1119 if (lcount
<= 1 && !dsisopen(dp
->d_slice
)) {
1120 error
= dev_dclose(dp
->d_rawdev
, ap
->a_fflag
, ap
->a_devtype
, NULL
);
1122 lwkt_reltoken(&ds_token
);
1128 * First execute the ioctl on the disk device, and if it isn't supported
1129 * try running it on the backing device.
1133 diskioctl(struct dev_ioctl_args
*ap
)
1135 cdev_t dev
= ap
->a_head
.a_dev
;
1144 devfs_debug(DEVFS_DEBUG_DEBUG
,
1145 "diskioctl: cmd is: %lx (name: %s)\n",
1146 ap
->a_cmd
, dev
->si_name
);
1147 devfs_debug(DEVFS_DEBUG_DEBUG
,
1148 "diskioctl: &dp->d_slice is: %p, %p\n",
1149 &dp
->d_slice
, dp
->d_slice
);
1151 if (ap
->a_cmd
== DIOCGKERNELDUMP
) {
1152 u
= *(u_int
*)ap
->a_data
;
1153 return disk_dumpconf(dev
, u
);
1156 if (ap
->a_cmd
== DIOCRECLUSTER
&& dev
== dp
->d_cdev
) {
1157 error
= disk_iocom_ioctl(dp
, ap
->a_cmd
, ap
->a_data
);
1161 if (&dp
->d_slice
== NULL
|| dp
->d_slice
== NULL
||
1162 ((dp
->d_info
.d_dsflags
& DSO_DEVICEMAPPER
) &&
1163 dkslice(dev
) == WHOLE_DISK_SLICE
)) {
1166 lwkt_gettoken(&ds_token
);
1167 error
= dsioctl(dev
, ap
->a_cmd
, ap
->a_data
, ap
->a_fflag
,
1168 &dp
->d_slice
, &dp
->d_info
);
1169 lwkt_reltoken(&ds_token
);
1172 if (error
== ENOIOCTL
) {
1173 error
= dev_dioctl(dp
->d_rawdev
, ap
->a_cmd
, ap
->a_data
,
1174 ap
->a_fflag
, ap
->a_cred
, NULL
, NULL
);
1180 * Execute strategy routine
1182 * WARNING! We are using the KVABIO API and must not access memory
1183 * through bp->b_data without first calling bkvasync(bp).
1187 diskstrategy(struct dev_strategy_args
*ap
)
1189 cdev_t dev
= ap
->a_head
.a_dev
;
1190 struct bio
*bio
= ap
->a_bio
;
1197 bio
->bio_buf
->b_error
= ENXIO
;
1198 bio
->bio_buf
->b_flags
|= B_ERROR
;
1202 KKASSERT(dev
->si_disk
== dp
);
1205 * The dscheck() function will also transform the slice relative
1206 * block number i.e. bio->bio_offset into a block number that can be
1207 * passed directly to the underlying raw device. If dscheck()
1208 * returns NULL it will have handled the bio for us (e.g. EOF
1209 * or error due to being beyond the device size).
1211 if ((nbio
= dscheck(dev
, bio
, dp
->d_slice
)) != NULL
) {
1212 dev_dstrategy(dp
->d_rawdev
, nbio
);
1220 * Return the partition size in ?blocks?
1224 diskpsize(struct dev_psize_args
*ap
)
1226 cdev_t dev
= ap
->a_head
.a_dev
;
1233 ap
->a_result
= dssize(dev
, &dp
->d_slice
);
1235 if ((ap
->a_result
== -1) &&
1236 (dp
->d_info
.d_dsflags
& DSO_RAWPSIZE
)) {
1237 ap
->a_head
.a_dev
= dp
->d_rawdev
;
1238 return dev_doperate(&ap
->a_head
);
1244 diskdump(struct dev_dump_args
*ap
)
1246 cdev_t dev
= ap
->a_head
.a_dev
;
1247 struct disk
*dp
= dev
->si_disk
;
1248 u_int64_t size
, offset
;
1251 error
= disk_dumpcheck(dev
, &size
, &ap
->a_blkno
, &ap
->a_secsize
);
1252 /* XXX: this should probably go in disk_dumpcheck somehow */
1253 if (ap
->a_length
!= 0) {
1255 offset
= ap
->a_blkno
* DEV_BSIZE
;
1256 if ((ap
->a_offset
< offset
) ||
1257 (ap
->a_offset
+ ap
->a_length
- offset
> size
)) {
1258 kprintf("Attempt to write outside dump "
1259 "device boundaries.\n");
1265 ap
->a_head
.a_dev
= dp
->d_rawdev
;
1266 error
= dev_doperate(&ap
->a_head
);
1273 SYSCTL_INT(_debug_sizeof
, OID_AUTO
, diskslices
, CTLFLAG_RD
,
1274 0, sizeof(struct diskslices
), "sizeof(struct diskslices)");
1276 SYSCTL_INT(_debug_sizeof
, OID_AUTO
, disk
, CTLFLAG_RD
,
1277 0, sizeof(struct disk
), "sizeof(struct disk)");
1280 * Reorder interval for burst write allowance and minor write
1283 * We always want to trickle some writes in to make use of the
1284 * disk's zone cache. Bursting occurs on a longer interval and only
1285 * runningbufspace is well over the hirunningspace limit.
1287 int bioq_reorder_burst_interval
= 60; /* should be multiple of minor */
1288 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_burst_interval
,
1289 CTLFLAG_RW
, &bioq_reorder_burst_interval
, 0, "");
1290 int bioq_reorder_minor_interval
= 5;
1291 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_minor_interval
,
1292 CTLFLAG_RW
, &bioq_reorder_minor_interval
, 0, "");
1294 int bioq_reorder_burst_bytes
= 3000000;
1295 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_burst_bytes
,
1296 CTLFLAG_RW
, &bioq_reorder_burst_bytes
, 0, "");
1297 int bioq_reorder_minor_bytes
= 262144;
1298 SYSCTL_INT(_kern
, OID_AUTO
, bioq_reorder_minor_bytes
,
1299 CTLFLAG_RW
, &bioq_reorder_minor_bytes
, 0, "");
1303 * Order I/Os. Generally speaking this code is designed to make better
1304 * use of drive zone caches. A drive zone cache can typically track linear
1305 * reads or writes for around 16 zones simultaniously.
1307 * Read prioritization issues: It is possible for hundreds of megabytes worth
1308 * of writes to be queued asynchronously. This creates a huge bottleneck
1309 * for reads which reduce read bandwidth to a trickle.
1311 * To solve this problem we generally reorder reads before writes.
1313 * However, a large number of random reads can also starve writes and
1314 * make poor use of the drive zone cache so we allow writes to trickle
1318 bioqdisksort(struct bio_queue_head
*bioq
, struct bio
*bio
)
1322 * The BIO wants to be ordered. Adding to the tail also
1323 * causes transition to be set to NULL, forcing the ordering
1324 * of all prior I/O's.
1326 if (bio
->bio_buf
->b_flags
& B_ORDERED
) {
1327 bioq_insert_tail(bioq
, bio
);
1332 switch(bio
->bio_buf
->b_cmd
) {
1334 if (bioq
->transition
) {
1336 * Insert before the first write. Bleedover writes
1337 * based on reorder intervals to prevent starvation.
1339 TAILQ_INSERT_BEFORE(bioq
->transition
, bio
, bio_act
);
1341 if (bioq
->reorder
% bioq_reorder_minor_interval
== 0) {
1342 bioqwritereorder(bioq
);
1343 if (bioq
->reorder
>=
1344 bioq_reorder_burst_interval
) {
1350 * No writes queued (or ordering was forced),
1353 TAILQ_INSERT_TAIL(&bioq
->queue
, bio
, bio_act
);
1358 * Writes are always appended. If no writes were previously
1359 * queued or an ordered tail insertion occured the transition
1360 * field will be NULL.
1362 TAILQ_INSERT_TAIL(&bioq
->queue
, bio
, bio_act
);
1363 if (bioq
->transition
== NULL
)
1364 bioq
->transition
= bio
;
1368 * All other request types are forced to be ordered.
1370 bioq_insert_tail(bioq
, bio
);
1376 * Move the read-write transition point to prevent reads from
1377 * completely starving our writes. This brings a number of writes into
1378 * the fold every N reads.
1380 * We bring a few linear writes into the fold on a minor interval
1381 * and we bring a non-linear burst of writes into the fold on a major
1382 * interval. Bursting only occurs if runningbufspace is really high
1383 * (typically from syncs, fsyncs, or HAMMER flushes).
1387 bioqwritereorder(struct bio_queue_head
*bioq
)
1395 if (bioq
->reorder
< bioq_reorder_burst_interval
||
1396 !buf_runningbufspace_severe()) {
1397 left
= (size_t)bioq_reorder_minor_bytes
;
1400 left
= (size_t)bioq_reorder_burst_bytes
;
1404 next_offset
= bioq
->transition
->bio_offset
;
1405 while ((bio
= bioq
->transition
) != NULL
&&
1406 (check_off
== 0 || next_offset
== bio
->bio_offset
)
1408 n
= bio
->bio_buf
->b_bcount
;
1409 next_offset
= bio
->bio_offset
+ n
;
1410 bioq
->transition
= TAILQ_NEXT(bio
, bio_act
);
1418 * Bounds checking against the media size, used for the raw partition.
1419 * secsize, mediasize and b_blkno must all be the same units.
1420 * Possibly this has to be DEV_BSIZE (512).
1423 bounds_check_with_mediasize(struct bio
*bio
, int secsize
, uint64_t mediasize
)
1425 struct buf
*bp
= bio
->bio_buf
;
1428 sz
= howmany(bp
->b_bcount
, secsize
);
1430 if (bio
->bio_offset
/DEV_BSIZE
+ sz
> mediasize
) {
1431 sz
= mediasize
- bio
->bio_offset
/DEV_BSIZE
;
1433 /* If exactly at end of disk, return EOF. */
1434 bp
->b_resid
= bp
->b_bcount
;
1438 /* If past end of disk, return EINVAL. */
1439 bp
->b_error
= EINVAL
;
1442 /* Otherwise, truncate request. */
1443 bp
->b_bcount
= sz
* secsize
;
1450 * Disk error is the preface to plaintive error messages
1451 * about failing disk transfers. It prints messages of the form
1453 hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d)
1455 * if the offset of the error in the transfer and a disk label
1456 * are both available. blkdone should be -1 if the position of the error
1457 * is unknown; the disklabel pointer may be null from drivers that have not
1458 * been converted to use them. The message is printed with kprintf
1459 * if pri is LOG_PRINTF, otherwise it uses log at the specified priority.
1460 * The message should be completed (with at least a newline) with kprintf
1461 * or log(-1, ...), respectively. There is no trailing space.
1464 diskerr(struct bio
*bio
, cdev_t dev
, const char *what
, int pri
, int donecnt
)
1466 struct buf
*bp
= bio
->bio_buf
;
1480 kprintf("%s: %s %sing ", dev
->si_name
, what
, term
);
1481 kprintf("offset %012llx for %d",
1482 (long long)bio
->bio_offset
,
1486 kprintf(" (%d bytes completed)", donecnt
);
1490 * Locate a disk device
1493 disk_locate(const char *devname
)
1495 return devfs_find_device_by_name("%s", devname
);
1499 disk_config(void *arg
)
1501 disk_msg_send_sync(DISK_SYNC
, NULL
, NULL
);
1507 struct thread
* td_core
;
1509 disk_msg_cache
= objcache_create("disk-msg-cache", 0, 0,
1511 objcache_malloc_alloc
,
1512 objcache_malloc_free
,
1513 &disk_msg_malloc_args
);
1515 lwkt_token_init(&disklist_token
, "disks");
1516 lwkt_token_init(&ds_token
, "ds");
1519 * Initialize the reply-only port which acts as a message drain
1521 lwkt_initport_replyonly(&disk_dispose_port
, disk_msg_autofree_reply
);
1523 lwkt_gettoken(&disklist_token
);
1524 lwkt_create(disk_msg_core
, /*args*/NULL
, &td_core
, NULL
,
1525 0, -1, "disk_msg_core");
1526 tsleep(td_core
, 0, "diskcore", 0);
1527 lwkt_reltoken(&disklist_token
);
1533 objcache_destroy(disk_msg_cache
);
1537 * Clean out illegal characters in serial numbers.
1540 disk_cleanserial(char *serno
)
1544 while ((c
= *serno
) != 0) {
1545 if (c
>= 'a' && c
<= 'z')
1547 else if (c
>= 'A' && c
<= 'Z')
1549 else if (c
>= '0' && c
<= '9')
1551 else if (c
== '-' || c
== '@' || c
== '+' || c
== '.')
1559 TUNABLE_INT("kern.disk_debug", &disk_debug_enable
);
1560 SYSCTL_INT(_kern
, OID_AUTO
, disk_debug
, CTLFLAG_RW
, &disk_debug_enable
,
1561 0, "Enable subr_disk debugging");
1563 SYSINIT(disk_register
, SI_SUB_PRE_DRIVERS
, SI_ORDER_FIRST
, disk_init
, NULL
);
1564 SYSUNINIT(disk_register
, SI_SUB_PRE_DRIVERS
, SI_ORDER_ANY
, disk_uninit
, NULL
);