2 * Copyright (c) 2003,2004 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
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14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
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18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
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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
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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/malloc.h>
97 #include <sys/sysctl.h>
98 #include <machine/md_var.h>
99 #include <sys/ctype.h>
100 #include <sys/syslog.h>
101 #include <sys/device.h>
102 #include <sys/msgport.h>
103 #include <sys/msgport2.h>
104 #include <sys/buf2.h>
105 #include <vfs/devfs/devfs.h>
107 #include <sys/thread2.h>
109 #include <sys/queue.h>
110 #include <sys/lock.h>
112 static MALLOC_DEFINE(M_DISK, "disk", "disk data");
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);
120 static d_open_t diskopen;
121 static d_close_t diskclose;
122 static d_ioctl_t diskioctl;
123 static d_strategy_t diskstrategy;
124 static d_psize_t diskpsize;
125 static d_clone_t diskclone;
126 static d_dump_t diskdump;
128 static LIST_HEAD(, disk) disklist = LIST_HEAD_INITIALIZER(&disklist);
130 static struct dev_ops disk_ops = {
131 { "disk", 0, D_DISK },
133 .d_close = diskclose,
135 .d_write = physwrite,
136 .d_ioctl = diskioctl,
137 .d_strategy = diskstrategy,
139 .d_psize = diskpsize,
143 static struct objcache *disk_msg_cache;
145 struct objcache_malloc_args disk_msg_malloc_args = {
146 sizeof(struct disk_msg), M_DISK };
148 static struct lwkt_port disk_dispose_port;
149 static struct lwkt_port disk_msg_port;
153 disk_probe_slice(struct disk *dp, cdev_t dev, int slice, int reprobe)
155 struct disk_info *info = &dp->d_info;
156 struct diskslice *sp = &dp->d_slice->dss_slices[slice];
158 struct partinfo part;
165 ops = &disklabel32_ops;
166 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info);
167 if (msg && !strcmp(msg, "no disk label")) {
168 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: trying with disklabel64\n");
169 ops = &disklabel64_ops;
170 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info);
172 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: label: %s\n", (msg)?msg:"is NULL");
174 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: found %d partitions in the label\n", ops->op_getnumparts(sp->ds_label));
175 if (slice != WHOLE_DISK_SLICE)
176 ops->op_adjust_label_reserved(dp->d_slice, slice, sp);
181 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: lp.opaque: %x\n", sp->ds_label.opaque);
182 for (i = 0; i < ops->op_getnumparts(sp->ds_label); i++) {
183 ops->op_loadpartinfo(sp->ds_label, i, &part);
184 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: partinfo says fstype=%d for part %d\n", part.fstype, i);
187 (ndev = devfs_find_device_by_name("%s%c",
188 dev->si_name, 'a'+ (char)i))) {
189 /* Device already exists and is still valid */
190 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: reprobing and device remained valid, mark it\n");
191 ndev->si_flags |= SI_REPROBE_TEST;
193 ndev = make_dev(&disk_ops,
194 dkmakeminor(dkunit(dp->d_cdev), slice, i),
195 UID_ROOT, GID_OPERATOR, 0640,
196 "%s%c", dev->si_name, 'a'+ (char)i);
198 make_dev_alias(ndev, "disk-by-id/diskTEST-sliceTEST-part%d", i);
201 ndev->si_flags |= SI_REPROBE_TEST;
204 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice:end: lp.opaque: %x\n", ndev->si_disk->d_slice->dss_slices[slice].ds_label.opaque);
207 } else if (info->d_dsflags & DSO_COMPATLABEL) {
209 if (sp->ds_size >= 0x100000000ULL)
210 ops = &disklabel64_ops;
212 ops = &disklabel32_ops;
213 sp->ds_label = ops->op_clone_label(info, sp);
215 if (sp->ds_type == DOSPTYP_386BSD /* XXX */)
216 log(LOG_WARNING, "%s: cannot find label (%s)\n",
221 sp->ds_wlabel = FALSE;
224 return (msg ? EINVAL : 0);
229 disk_probe(struct disk *dp, int reprobe)
231 struct disk_info *info = &dp->d_info;
232 cdev_t dev = dp->d_cdev;
236 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe called for %s\n", dp->d_cdev->si_name);
237 KKASSERT (info->d_media_blksize != 0);
238 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: info set!\n");
240 dp->d_slice = dsmakeslicestruct(BASE_SLICE, info);
242 error = mbrinit(dev, info, &(dp->d_slice));
243 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: &dp->d_slice is: %x, %x\n", &dp->d_slice, dp->d_slice);
245 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: mbrinit() failed with error: %d\n", error);
248 devfs_debug(DEVFS_DEBUG_DEBUG, "mbrinit succeeded, found %d slices\n", dp->d_slice->dss_nslices);
249 if (dp->d_slice->dss_nslices == BASE_SLICE) {
250 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_size = info->d_media_blocks;
251 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_reserved = 0;
253 (ndev = devfs_find_device_by_name("%ss%d",
254 dev->si_name, COMPATIBILITY_SLICE))) {
255 /* Device already exists and is still valid */
256 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: reprobing and device remained valid, mark it\n");
257 ndev->si_flags |= SI_REPROBE_TEST;
259 ndev = make_dev(&disk_ops,
260 dkmakewholeslice(dkunit(dev), COMPATIBILITY_SLICE),
261 UID_ROOT, GID_OPERATOR, 0640,
262 "%ss%d", dev->si_name, COMPATIBILITY_SLICE);
265 ndev->si_flags |= SI_REPROBE_TEST;
268 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_dev = ndev;
269 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: type of slice is :%x\n", dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_type );
271 dp->d_slice->dss_first_bsd_slice = COMPATIBILITY_SLICE;
272 disk_probe_slice(dp, ndev, COMPATIBILITY_SLICE, reprobe);
275 for (i = BASE_SLICE; i < dp->d_slice->dss_nslices; i++) {
277 (ndev = devfs_find_device_by_name("%ss%d",
278 dev->si_name, i-1))) {
279 /* Device already exists and is still valid */
280 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: reprobing and device remained valid, mark it\n");
281 ndev->si_flags |= SI_REPROBE_TEST;
283 ndev = make_dev(&disk_ops,
284 dkmakewholeslice(dkunit(dev), i),
285 UID_ROOT, GID_OPERATOR, 0640,
286 "%ss%d", dev->si_name, i-1);
288 make_dev_alias(ndev, "disk-by-id/diskTEST-slice%d", i-1);
291 ndev->si_flags |= SI_REPROBE_TEST;
293 dp->d_slice->dss_slices[i].ds_reserved = 0;
294 dp->d_slice->dss_slices[i].ds_dev = ndev;
295 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe-> type of slice is :%x\n", dp->d_slice->dss_slices[i].ds_type );
296 if (dp->d_slice->dss_slices[i].ds_type == DOSPTYP_386BSD) {
297 if (!dp->d_slice->dss_first_bsd_slice)
298 dp->d_slice->dss_first_bsd_slice = i;
299 disk_probe_slice(dp, ndev, i, reprobe);
307 disk_msg_core(void *arg)
311 struct diskslice *sp;
315 lwkt_initport_thread(&disk_msg_port, curthread);
319 msg = (disk_msg_t)lwkt_waitport(&disk_msg_port, 0);
320 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_msg_core, new msg: %x\n", (unsigned int)msg->hdr.u.ms_result);
322 switch (msg->hdr.u.ms_result) {
324 case DISK_DISK_PROBE:
325 dp = (struct disk *)msg->load;
329 case DISK_DISK_DESTROY:
330 dp = (struct disk *)msg->load;
331 devfs_destroy_subnames(dp->d_cdev->si_name);
332 devfs_destroy_dev(dp->d_cdev);
333 LIST_REMOVE(dp, d_list);
334 //devfs_destroy_dev(dp->d_rawdev); //XXX: needed? when?
338 dp = (struct disk *)msg->load;
339 devfs_destroy_subnames(dp->d_cdev->si_name);
342 case DISK_SLICE_REPROBE:
343 dp = (struct disk *)msg->load;
344 sp = (struct diskslice *)msg->load2;
345 devfs_clr_subnames_flag(sp->ds_dev->si_name, SI_REPROBE_TEST);
346 devfs_debug(DEVFS_DEBUG_DEBUG,
347 "DISK_SLICE_REPROBE: %s\n",
348 sp->ds_dev->si_name);
349 disk_probe_slice(dp, sp->ds_dev, dkslice(sp->ds_dev), 1);
350 devfs_destroy_subnames_without_flag(sp->ds_dev->si_name,
354 case DISK_DISK_REPROBE:
355 dp = (struct disk *)msg->load;
356 devfs_clr_subnames_flag(dp->d_cdev->si_name, SI_REPROBE_TEST);
357 devfs_debug(DEVFS_DEBUG_DEBUG,
358 "DISK_DISK_REPROBE: %s\n",
359 dp->d_cdev->si_name);
361 devfs_destroy_subnames_without_flag(dp->d_cdev->si_name,
369 devfs_debug(DEVFS_DEBUG_WARNING, "disk_msg_core: unknown message received at core\n");
372 lwkt_replymsg((lwkt_msg_t)msg, 0);
379 * Acts as a message drain. Any message that is replied to here gets destroyed and
383 disk_msg_autofree_reply(lwkt_port_t port, lwkt_msg_t msg)
385 objcache_put(disk_msg_cache, msg);
390 disk_msg_send(uint32_t cmd, void *load, void *load2)
393 lwkt_port_t port = &disk_msg_port;
395 disk_msg = objcache_get(disk_msg_cache, M_WAITOK);
397 lwkt_initmsg(&disk_msg->hdr, &disk_dispose_port, 0);
399 disk_msg->hdr.u.ms_result = cmd;
400 disk_msg->load = load;
401 disk_msg->load2 = load2;
403 lwkt_sendmsg(port, (lwkt_msg_t)disk_msg);
407 disk_msg_send_sync(uint32_t cmd, void *load, void *load2)
409 struct lwkt_port rep_port;
410 disk_msg_t disk_msg = objcache_get(disk_msg_cache, M_WAITOK);
411 disk_msg_t msg_incoming;
412 lwkt_port_t port = &disk_msg_port;
414 lwkt_initport_thread(&rep_port, curthread);
415 lwkt_initmsg(&disk_msg->hdr, &rep_port, 0);
417 disk_msg->hdr.u.ms_result = cmd;
418 disk_msg->load = load;
419 disk_msg->load2 = load2;
422 lwkt_sendmsg(port, (lwkt_msg_t)disk_msg);
423 msg_incoming = lwkt_waitport(&rep_port, 0);
427 * Create a raw device for the dev_ops template (which is returned). Also
428 * create a slice and unit managed disk and overload the user visible
429 * device space with it.
431 * NOTE: The returned raw device is NOT a slice and unit managed device.
432 * It is an actual raw device representing the raw disk as specified by
433 * the passed dev_ops. The disk layer not only returns such a raw device,
434 * it also uses it internally when passing (modified) commands through.
437 disk_create(int unit, struct disk *dp, struct dev_ops *raw_ops)
441 rawdev = make_only_dev(raw_ops, dkmakewholedisk(unit),
442 UID_ROOT, GID_OPERATOR, 0640,
443 "%s%d", raw_ops->head.name, unit);
446 bzero(dp, sizeof(*dp));
448 dp->d_rawdev = rawdev;
449 dp->d_raw_ops = raw_ops;
450 dp->d_dev_ops = &disk_ops;
451 dp->d_cdev = make_dev(&disk_ops,
452 dkmakewholedisk(unit),
453 UID_ROOT, GID_OPERATOR, 0640,
454 "%s%d", raw_ops->head.name, unit);
456 dp->d_cdev->si_disk = dp;
458 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_create called for %s\n", dp->d_cdev->si_name);
459 LIST_INSERT_HEAD(&disklist, dp, d_list);
460 return (dp->d_rawdev);
465 _setdiskinfo(struct disk *disk, struct disk_info *info)
467 devfs_debug(DEVFS_DEBUG_DEBUG, "_setdiskinfo called for disk -1-: %x\n", disk);
468 bcopy(info, &disk->d_info, sizeof(disk->d_info));
469 info = &disk->d_info;
471 KKASSERT(info->d_media_size == 0 || info->d_media_blksize == 0);
472 if (info->d_media_size == 0 && info->d_media_blocks) {
473 info->d_media_size = (u_int64_t)info->d_media_blocks *
474 info->d_media_blksize;
475 } else if (info->d_media_size && info->d_media_blocks == 0 &&
476 info->d_media_blksize) {
477 info->d_media_blocks = info->d_media_size /
478 info->d_media_blksize;
482 * The si_* fields for rawdev are not set until after the
483 * disk_create() call, so someone using the cooked version
484 * of the raw device (i.e. da0s0) will not get the right
485 * si_iosize_max unless we fix it up here.
487 if (disk->d_cdev && disk->d_rawdev &&
488 disk->d_cdev->si_iosize_max == 0) {
489 disk->d_cdev->si_iosize_max = disk->d_rawdev->si_iosize_max;
490 disk->d_cdev->si_bsize_phys = disk->d_rawdev->si_bsize_phys;
491 disk->d_cdev->si_bsize_best = disk->d_rawdev->si_bsize_best;
496 * Disk drivers must call this routine when media parameters are available
500 disk_setdiskinfo(struct disk *disk, struct disk_info *info)
502 _setdiskinfo(disk, info);
503 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_setdiskinfo called for disk -2-: %x\n", disk);
504 disk_msg_send(DISK_DISK_PROBE, disk, NULL);
508 disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info)
510 _setdiskinfo(disk, info);
511 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_setdiskinfo_sync called for disk -2-: %x\n", disk);
512 disk_msg_send_sync(DISK_DISK_PROBE, disk, NULL);
516 * This routine is called when an adapter detaches. The higher level
517 * managed disk device is destroyed while the lower level raw device is
521 disk_destroy(struct disk *disk)
523 disk_msg_send_sync(DISK_DISK_DESTROY, disk, NULL);
528 disk_dumpcheck(cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize)
530 struct partinfo pinfo;
533 bzero(&pinfo, sizeof(pinfo));
534 error = dev_dioctl(dev, DIOCGPART, (void *)&pinfo, 0, proc0.p_ucred);
537 if (pinfo.media_blksize == 0)
539 *count = (u_int64_t)Maxmem * PAGE_SIZE / pinfo.media_blksize;
540 if (dumplo64 < pinfo.reserved_blocks ||
541 dumplo64 + *count > pinfo.media_blocks) {
544 *blkno = dumplo64 + pinfo.media_offset / pinfo.media_blksize;
545 *secsize = pinfo.media_blksize;
550 disk_unprobe(struct disk *disk)
555 disk_msg_send_sync(DISK_UNPROBE, disk, NULL);
559 disk_invalidate (struct disk *disk)
561 devfs_debug(DEVFS_DEBUG_INFO, "disk_invalidate for %s\n", disk->d_cdev->si_name);
563 dsgone(&disk->d_slice);
567 disk_enumerate(struct disk *disk)
570 return (LIST_FIRST(&disklist));
572 return (LIST_NEXT(disk, d_list));
577 sysctl_disks(SYSCTL_HANDLER_ARGS)
585 while ((disk = disk_enumerate(disk))) {
587 error = SYSCTL_OUT(req, " ", 1);
593 error = SYSCTL_OUT(req, disk->d_rawdev->si_name,
594 strlen(disk->d_rawdev->si_name));
598 error = SYSCTL_OUT(req, "", 1);
602 SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD, NULL, 0,
603 sysctl_disks, "A", "names of available disks");
606 * Open a disk device or partition.
610 diskopen(struct dev_open_args *ap)
612 cdev_t dev = ap->a_head.a_dev;
616 devfs_debug(DEVFS_DEBUG_DEBUG, "diskopen: name is %s\n", dev->si_name);
619 * dp can't be NULL here XXX.
627 * Deal with open races
629 while (dp->d_flags & DISKFLAG_LOCK) {
630 dp->d_flags |= DISKFLAG_WANTED;
631 error = tsleep(dp, PCATCH, "diskopen", hz);
635 dp->d_flags |= DISKFLAG_LOCK;
637 devfs_debug(DEVFS_DEBUG_DEBUG, "diskopen: -2- name is %s\n", dev->si_name);
640 * Open the underlying raw device.
642 if (!dsisopen(dp->d_slice)) {
644 if (!pdev->si_iosize_max)
645 pdev->si_iosize_max = dev->si_iosize_max;
647 error = dev_dopen(dp->d_rawdev, ap->a_oflags,
648 ap->a_devtype, ap->a_cred);
652 * Inherit properties from the underlying device now that it is
660 error = dsopen(dev, ap->a_devtype, dp->d_info.d_dsflags,
661 &dp->d_slice, &dp->d_info);
662 if (!dsisopen(dp->d_slice)) {
663 dev_dclose(dp->d_rawdev, ap->a_oflags, ap->a_devtype);
666 dp->d_flags &= ~DISKFLAG_LOCK;
667 if (dp->d_flags & DISKFLAG_WANTED) {
668 dp->d_flags &= ~DISKFLAG_WANTED;
676 * Close a disk device or partition
680 diskclose(struct dev_close_args *ap)
682 cdev_t dev = ap->a_head.a_dev;
689 devfs_debug(DEVFS_DEBUG_DEBUG, "diskclose: name %s\n", dev->si_name);
691 dsclose(dev, ap->a_devtype, dp->d_slice);
692 if (!dsisopen(dp->d_slice)) {
693 devfs_debug(DEVFS_DEBUG_DEBUG, "diskclose is closing underlying device\n");
694 error = dev_dclose(dp->d_rawdev, ap->a_fflag, ap->a_devtype);
700 * First execute the ioctl on the disk device, and if it isn't supported
701 * try running it on the backing device.
705 diskioctl(struct dev_ioctl_args *ap)
707 cdev_t dev = ap->a_head.a_dev;
715 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: cmd is: %x (name: %s)\n", ap->a_cmd, dev->si_name);
716 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: &dp->d_slice is: %x, %x\n", &dp->d_slice, dp->d_slice);
718 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl:1: says lp.opaque is: %x\n", dp->d_slice->dss_slices[0].ds_label.opaque);
720 error = dsioctl(dev, ap->a_cmd, ap->a_data, ap->a_fflag,
721 &dp->d_slice, &dp->d_info);
723 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl:2: says lp.opaque is: %x\n", dp->d_slice->dss_slices[0].ds_label.opaque);
725 if (error == ENOIOCTL) {
726 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: going for dev_dioctl instead!\n");
727 error = dev_dioctl(dp->d_rawdev, ap->a_cmd, ap->a_data,
728 ap->a_fflag, ap->a_cred);
734 * Execute strategy routine
738 diskstrategy(struct dev_strategy_args *ap)
740 cdev_t dev = ap->a_head.a_dev;
741 struct bio *bio = ap->a_bio;
748 bio->bio_buf->b_error = ENXIO;
749 bio->bio_buf->b_flags |= B_ERROR;
753 KKASSERT(dev->si_disk == dp);
756 * The dscheck() function will also transform the slice relative
757 * block number i.e. bio->bio_offset into a block number that can be
758 * passed directly to the underlying raw device. If dscheck()
759 * returns NULL it will have handled the bio for us (e.g. EOF
760 * or error due to being beyond the device size).
762 if ((nbio = dscheck(dev, bio, dp->d_slice)) != NULL) {
763 dev_dstrategy(dp->d_rawdev, nbio);
765 devfs_debug(DEVFS_DEBUG_DEBUG, "diskstrategy: dscheck NULL!!! biodone time!\n");
772 * Return the partition size in ?blocks?
776 diskpsize(struct dev_psize_args *ap)
778 cdev_t dev = ap->a_head.a_dev;
784 ap->a_result = dssize(dev, &dp->d_slice);
789 * When new device entries are instantiated, make sure they inherit our
790 * si_disk structure and block and iosize limits from the raw device.
792 * This routine is always called synchronously in the context of the
795 * XXX The various io and block size constraints are not always initialized
796 * properly by devices.
800 diskclone(struct dev_clone_args *ap)
802 cdev_t dev = ap->a_head.a_dev;
806 KKASSERT(dp != NULL);
808 dev->si_iosize_max = dp->d_rawdev->si_iosize_max;
809 dev->si_bsize_phys = dp->d_rawdev->si_bsize_phys;
810 dev->si_bsize_best = dp->d_rawdev->si_bsize_best;
815 diskdump(struct dev_dump_args *ap)
817 cdev_t dev = ap->a_head.a_dev;
818 struct disk *dp = dev->si_disk;
821 error = disk_dumpcheck(dev, &ap->a_count, &ap->a_blkno, &ap->a_secsize);
823 ap->a_head.a_dev = dp->d_rawdev;
824 error = dev_doperate(&ap->a_head);
831 SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD,
832 0, sizeof(struct diskslices), "sizeof(struct diskslices)");
834 SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD,
835 0, sizeof(struct disk), "sizeof(struct disk)");
839 * Seek sort for disks.
841 * The bio_queue keep two queues, sorted in ascending block order. The first
842 * queue holds those requests which are positioned after the current block
843 * (in the first request); the second, which starts at queue->switch_point,
844 * holds requests which came in after their block number was passed. Thus
845 * we implement a one way scan, retracting after reaching the end of the drive
846 * to the first request on the second queue, at which time it becomes the
849 * A one-way scan is natural because of the way UNIX read-ahead blocks are
853 bioqdisksort(struct bio_queue_head *bioq, struct bio *bio)
859 be = TAILQ_LAST(&bioq->queue, bio_queue);
861 * If the queue is empty or we are an
862 * ordered transaction, then it's easy.
864 if ((bq = bioq_first(bioq)) == NULL ||
865 (bio->bio_buf->b_flags & B_ORDERED) != 0) {
866 bioq_insert_tail(bioq, bio);
868 } else if (bioq->insert_point != NULL) {
871 * A certain portion of the list is
872 * "locked" to preserve ordering, so
873 * we can only insert after the insert
876 bq = bioq->insert_point;
880 * If we lie before the last removed (currently active)
881 * request, and are not inserting ourselves into the
882 * "locked" portion of the list, then we must add ourselves
883 * to the second request list.
885 if (bio->bio_offset < bioq->last_offset) {
886 bq = bioq->switch_point;
888 * If we are starting a new secondary list,
892 bioq->switch_point = bio;
893 bioq_insert_tail(bioq, bio);
897 * If we lie ahead of the current switch point,
898 * insert us before the switch point and move
901 if (bio->bio_offset < bq->bio_offset) {
902 bioq->switch_point = bio;
903 TAILQ_INSERT_BEFORE(bq, bio, bio_act);
907 if (bioq->switch_point != NULL)
908 be = TAILQ_PREV(bioq->switch_point,
911 * If we lie between last_offset and bq,
914 if (bio->bio_offset < bq->bio_offset) {
915 TAILQ_INSERT_BEFORE(bq, bio, bio_act);
922 * Request is at/after our current position in the list.
923 * Optimize for sequential I/O by seeing if we go at the tail.
925 if (bio->bio_offset > be->bio_offset) {
926 TAILQ_INSERT_AFTER(&bioq->queue, be, bio, bio_act);
930 /* Otherwise, insertion sort */
931 while ((bn = TAILQ_NEXT(bq, bio_act)) != NULL) {
934 * We want to go after the current request if it is the end
935 * of the first request list, or if the next request is a
936 * larger cylinder than our request.
938 if (bn == bioq->switch_point
939 || bio->bio_offset < bn->bio_offset)
943 TAILQ_INSERT_AFTER(&bioq->queue, bq, bio, bio_act);
947 * Disk error is the preface to plaintive error messages
948 * about failing disk transfers. It prints messages of the form
950 hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d)
952 * if the offset of the error in the transfer and a disk label
953 * are both available. blkdone should be -1 if the position of the error
954 * is unknown; the disklabel pointer may be null from drivers that have not
955 * been converted to use them. The message is printed with kprintf
956 * if pri is LOG_PRINTF, otherwise it uses log at the specified priority.
957 * The message should be completed (with at least a newline) with kprintf
958 * or log(-1, ...), respectively. There is no trailing space.
961 diskerr(struct bio *bio, cdev_t dev, const char *what, int pri, int donecnt)
963 struct buf *bp = bio->bio_buf;
977 //sname = dsname(dev, unit, slice, part, partname);
978 kprintf("%s: %s %sing ", dev->si_name, what, term);
979 kprintf("offset %012llx for %d",
980 (long long)bio->bio_offset,
984 kprintf(" (%d bytes completed)", donecnt);
988 * Locate a disk device
991 disk_locate(const char *devname)
993 return devfs_find_device_by_name(devname);
998 disk_config(void *arg)
1000 disk_msg_send_sync(DISK_SYNC, NULL, NULL);
1007 struct thread* td_core;
1008 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_init() called\n");
1010 disk_msg_cache = objcache_create("disk-msg-cache", 0, 0,
1012 objcache_malloc_alloc,
1013 objcache_malloc_free,
1014 &disk_msg_malloc_args );
1016 /* Initialize the reply-only port which acts as a message drain */
1017 lwkt_initport_replyonly(&disk_dispose_port, disk_msg_autofree_reply);
1019 lwkt_create(disk_msg_core, /*args*/NULL, &td_core, NULL,
1020 0, 0, "disk_msg_core");
1022 tsleep(td_core, 0, "diskcore", 0);
1029 devfs_debug(DEVFS_DEBUG_DEBUG, "devfs_uninit() called\n");
1031 objcache_destroy(disk_msg_cache);
1036 SYSINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_FIRST, disk_init, NULL);
1037 SYSUNINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_ANY, disk_uninit, NULL);