2 * ----------------------------------------------------------------------------
3 * "THE BEER-WARE LICENSE" (Revision 42):
4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
5 * can do whatever you want with this stuff. If we meet some day, and you think
6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
7 * ----------------------------------------------------------------------------
14 * The following functions are based in the vn(4) driver: mdstart_swap(),
15 * mdstart_vnode(), mdcreate_swap(), mdcreate_vnode() and mddestroy(),
16 * and as such under the following copyright:
18 * Copyright (c) 1988 University of Utah.
19 * Copyright (c) 1990, 1993
20 * The Regents of the University of California. All rights reserved.
22 * This code is derived from software contributed to Berkeley by
23 * the Systems Programming Group of the University of Utah Computer
26 * Redistribution and use in source and binary forms, with or without
27 * modification, are permitted provided that the following conditions
29 * 1. Redistributions of source code must retain the above copyright
30 * notice, this list of conditions and the following disclaimer.
31 * 2. Redistributions in binary form must reproduce the above copyright
32 * notice, this list of conditions and the following disclaimer in the
33 * documentation and/or other materials provided with the distribution.
34 * 4. Neither the name of the University nor the names of its contributors
35 * may be used to endorse or promote products derived from this software
36 * without specific prior written permission.
38 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
41 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * from: Utah Hdr: vn.c 1.13 94/04/02
52 * from: @(#)vn.c 8.6 (Berkeley) 4/1/94
53 * From: src/sys/dev/vn/vn.c,v 1.122 2000/12/16 16:06:03
59 #include <sys/param.h>
60 #include <sys/systm.h>
63 #include <sys/fcntl.h>
64 #include <sys/kernel.h>
65 #include <sys/kthread.h>
66 #include <sys/linker.h>
68 #include <sys/malloc.h>
69 #include <sys/mdioctl.h>
70 #include <sys/mutex.h>
71 #include <sys/namei.h>
73 #include <sys/queue.h>
74 #include <sys/sched.h>
75 #include <sys/sf_buf.h>
76 #include <sys/sysctl.h>
77 #include <sys/vnode.h>
79 #include <geom/geom.h>
82 #include <vm/vm_object.h>
83 #include <vm/vm_page.h>
84 #include <vm/vm_pager.h>
85 #include <vm/swap_pager.h>
90 #define MD_SHUTDOWN 0x10000 /* Tell worker thread to terminate. */
93 #define MD_NSECT (10000 * 2)
96 static MALLOC_DEFINE(M_MD, "MD disk", "Memory Disk");
97 static MALLOC_DEFINE(M_MDSECT, "MD sectors", "Memory Disk Sectors");
100 SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, "");
102 #if defined(MD_ROOT) && defined(MD_ROOT_SIZE)
103 /* Image gets put here: */
104 static u_char mfs_root[MD_ROOT_SIZE*1024] = "MFS Filesystem goes here";
105 static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here";
108 static g_init_t g_md_init;
109 static g_fini_t g_md_fini;
110 static g_start_t g_md_start;
111 static g_access_t g_md_access;
114 static struct cdev *status_dev = 0;
116 static d_ioctl_t mdctlioctl;
118 static struct cdevsw mdctl_cdevsw = {
119 .d_version = D_VERSION,
120 .d_flags = D_NEEDGIANT,
121 .d_ioctl = mdctlioctl,
125 struct g_class g_md_class = {
127 .version = G_VERSION,
131 .access = g_md_access,
134 DECLARE_GEOM_CLASS(g_md_class, g_md);
137 static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(&md_softc_list);
139 #define NINDIR (PAGE_SIZE / sizeof(uintptr_t))
140 #define NMASK (NINDIR-1)
152 LIST_ENTRY(md_s) list;
153 struct bio_queue_head bio_queue;
154 struct mtx queue_mtx;
166 struct g_provider *pp;
168 /* MD_MALLOC related fields */
172 /* MD_PRELOAD related fields */
176 /* MD_VNODE related fields */
181 /* MD_SWAP related fields */
185 static int mddestroy(struct md_s *sc, struct thread *td);
187 static struct indir *
188 new_indir(u_int shift)
192 ip = malloc(sizeof *ip, M_MD, M_NOWAIT | M_ZERO);
195 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
196 M_MDSECT, M_NOWAIT | M_ZERO);
197 if (ip->array == NULL) {
207 del_indir(struct indir *ip)
210 free(ip->array, M_MDSECT);
215 destroy_indir(struct md_s *sc, struct indir *ip)
219 for (i = 0; i < NINDIR; i++) {
223 destroy_indir(sc, (struct indir*)(ip->array[i]));
224 else if (ip->array[i] > 255)
225 uma_zfree(sc->uma, (void *)(ip->array[i]));
231 * This function does the math and alloctes the top level "indir" structure
232 * for a device of "size" sectors.
235 static struct indir *
236 dimension(off_t size)
244 while (rcnt > NINDIR) {
248 /* figure out log2(NINDIR) */
249 for (i = NINDIR, nshift = -1; i; nshift++)
253 * XXX: the top layer is probably not fully populated, so we allocate
254 * too much space for ip->array in here.
256 ip = malloc(sizeof *ip, M_MD, M_WAITOK | M_ZERO);
257 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
258 M_MDSECT, M_WAITOK | M_ZERO);
260 ip->shift = layer * nshift;
265 * Read a given sector
269 s_read(struct indir *ip, off_t offset)
276 printf("s_read(%jd)\n", (intmax_t)offset);
278 for (cip = ip; cip != NULL;) {
280 idx = (offset >> cip->shift) & NMASK;
281 up = cip->array[idx];
282 cip = (struct indir *)up;
285 idx = offset & NMASK;
286 return (cip->array[idx]);
292 * Write a given sector, prune the tree if the value is 0
296 s_write(struct indir *ip, off_t offset, uintptr_t ptr)
298 struct indir *cip, *lip[10];
303 printf("s_write(%jd, %p)\n", (intmax_t)offset, (void *)ptr);
310 idx = (offset >> cip->shift) & NMASK;
311 up = cip->array[idx];
313 cip = (struct indir *)up;
316 /* Allocate branch */
318 (uintptr_t)new_indir(cip->shift - nshift);
319 if (cip->array[idx] == 0)
322 up = cip->array[idx];
323 cip = (struct indir *)up;
327 idx = offset & NMASK;
328 up = cip->array[idx];
331 cip->array[idx] = ptr;
336 if (cip->used != 0 || li == 1)
339 while (cip->used == 0 && cip != ip) {
341 idx = (offset >> lip[li]->shift) & NMASK;
342 up = lip[li]->array[idx];
343 KASSERT(up == (uintptr_t)cip, ("md screwed up"));
345 lip[li]->array[idx] = 0;
354 g_md_access(struct g_provider *pp, int r, int w, int e)
358 sc = pp->geom->softc;
364 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
366 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
373 g_md_start(struct bio *bp)
377 sc = bp->bio_to->geom->softc;
378 mtx_lock(&sc->queue_mtx);
379 bioq_disksort(&sc->bio_queue, bp);
380 mtx_unlock(&sc->queue_mtx);
387 mdstart_malloc(struct md_s *sc, struct bio *bp)
391 off_t secno, nsec, uc;
394 nsec = bp->bio_length / sc->sectorsize;
395 secno = bp->bio_offset / sc->sectorsize;
399 osp = s_read(sc->indir, secno);
400 if (bp->bio_cmd == BIO_DELETE) {
402 error = s_write(sc->indir, secno, 0);
403 } else if (bp->bio_cmd == BIO_READ) {
405 bzero(dst, sc->sectorsize);
407 for (i = 0; i < sc->sectorsize; i++)
410 bcopy((void *)osp, dst, sc->sectorsize);
412 } else if (bp->bio_cmd == BIO_WRITE) {
413 if (sc->flags & MD_COMPRESS) {
415 for (i = 1; i < sc->sectorsize; i++)
422 if (i == sc->sectorsize) {
424 error = s_write(sc->indir, secno, uc);
427 sp = (uintptr_t)uma_zalloc(sc->uma,
433 bcopy(dst, (void *)sp, sc->sectorsize);
434 error = s_write(sc->indir, secno, sp);
436 bcopy(dst, (void *)osp, sc->sectorsize);
444 uma_zfree(sc->uma, (void*)osp);
448 dst += sc->sectorsize;
455 mdstart_preload(struct md_s *sc, struct bio *bp)
458 switch (bp->bio_cmd) {
460 bcopy(sc->pl_ptr + bp->bio_offset, bp->bio_data,
464 bcopy(bp->bio_data, sc->pl_ptr + bp->bio_offset,
473 mdstart_vnode(struct md_s *sc, struct bio *bp)
483 * If an error occurs, we set BIO_ERROR but we do not set
484 * B_INVAL because (for a write anyway), the buffer is
488 bzero(&auio, sizeof(auio));
490 aiov.iov_base = bp->bio_data;
491 aiov.iov_len = bp->bio_length;
492 auio.uio_iov = &aiov;
494 auio.uio_offset = (vm_ooffset_t)bp->bio_offset;
495 auio.uio_segflg = UIO_SYSSPACE;
496 if(bp->bio_cmd == BIO_READ)
497 auio.uio_rw = UIO_READ;
498 else if(bp->bio_cmd == BIO_WRITE)
499 auio.uio_rw = UIO_WRITE;
501 panic("wrong BIO_OP in mdstart_vnode");
502 auio.uio_resid = bp->bio_length;
503 auio.uio_td = curthread;
505 * When reading set IO_DIRECT to try to avoid double-caching
506 * the data. When writing IO_DIRECT is not optimal.
508 if (bp->bio_cmd == BIO_READ) {
509 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curthread);
510 error = VOP_READ(sc->vnode, &auio, IO_DIRECT, sc->cred);
511 VOP_UNLOCK(sc->vnode, 0, curthread);
513 (void) vn_start_write(sc->vnode, &mp, V_WAIT);
514 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curthread);
515 error = VOP_WRITE(sc->vnode, &auio,
516 sc->flags & MD_ASYNC ? 0 : IO_SYNC, sc->cred);
517 VOP_UNLOCK(sc->vnode, 0, curthread);
518 vn_finished_write(mp);
520 bp->bio_resid = auio.uio_resid;
525 mdstart_swap(struct md_s *sc, struct bio *bp)
528 int rv, offs, len, lastend;
529 vm_pindex_t i, lastp;
536 * offs is the ofset at whih to start operating on the
537 * next (ie, first) page. lastp is the last page on
538 * which we're going to operate. lastend is the ending
539 * position within that last page (ie, PAGE_SIZE if
540 * we're operating on complete aligned pages).
542 offs = bp->bio_offset % PAGE_SIZE;
543 lastp = (bp->bio_offset + bp->bio_length - 1) / PAGE_SIZE;
544 lastend = (bp->bio_offset + bp->bio_length - 1) % PAGE_SIZE + 1;
547 VM_OBJECT_LOCK(sc->object);
548 vm_object_pip_add(sc->object, 1);
549 for (i = bp->bio_offset / PAGE_SIZE; i <= lastp; i++) {
550 len = ((i == lastp) ? lastend : PAGE_SIZE) - offs;
552 m = vm_page_grab(sc->object, i,
553 VM_ALLOC_NORMAL|VM_ALLOC_RETRY);
554 VM_OBJECT_UNLOCK(sc->object);
555 sf = sf_buf_alloc(m, 0);
556 VM_OBJECT_LOCK(sc->object);
557 if (bp->bio_cmd == BIO_READ) {
558 if (m->valid != VM_PAGE_BITS_ALL)
559 rv = vm_pager_get_pages(sc->object, &m, 1, 0);
560 if (rv == VM_PAGER_ERROR) {
562 vm_page_lock_queues();
564 vm_page_unlock_queues();
567 bcopy((void *)(sf_buf_kva(sf) + offs), p, len);
568 } else if (bp->bio_cmd == BIO_WRITE) {
569 if (len != PAGE_SIZE && m->valid != VM_PAGE_BITS_ALL)
570 rv = vm_pager_get_pages(sc->object, &m, 1, 0);
571 if (rv == VM_PAGER_ERROR) {
573 vm_page_lock_queues();
575 vm_page_unlock_queues();
578 bcopy(p, (void *)(sf_buf_kva(sf) + offs), len);
579 m->valid = VM_PAGE_BITS_ALL;
581 } else if (bp->bio_cmd == BIO_DELETE) {
582 if (len != PAGE_SIZE && m->valid != VM_PAGE_BITS_ALL)
583 rv = vm_pager_get_pages(sc->object, &m, 1, 0);
584 if (rv == VM_PAGER_ERROR) {
586 vm_page_lock_queues();
588 vm_page_unlock_queues();
591 bzero((void *)(sf_buf_kva(sf) + offs), len);
593 m->valid = VM_PAGE_BITS_ALL;
597 vm_page_lock_queues();
600 if (bp->bio_cmd == BIO_WRITE)
602 vm_page_unlock_queues();
604 /* Actions on further pages start at offset 0 */
605 p += PAGE_SIZE - offs;
608 if (bootverbose || bp->bio_offset / PAGE_SIZE < 17)
609 printf("wire_count %d busy %d flags %x hold_count %d act_count %d queue %d valid %d dirty %d @ %d\n",
610 m->wire_count, m->busy,
611 m->flags, m->hold_count, m->act_count, m->queue, m->valid, m->dirty, i);
614 vm_object_pip_subtract(sc->object, 1);
615 vm_object_set_writeable_dirty(sc->object);
616 VM_OBJECT_UNLOCK(sc->object);
617 return (rv != VM_PAGER_ERROR ? 0 : ENOSPC);
621 md_kthread(void *arg)
628 mtx_lock_spin(&sched_lock);
629 sched_prio(curthread, PRIBIO);
630 mtx_unlock_spin(&sched_lock);
646 mtx_lock(&sc->queue_mtx);
647 bp = bioq_takefirst(&sc->bio_queue);
649 if (sc->flags & MD_SHUTDOWN) {
650 mtx_unlock(&sc->queue_mtx);
657 msleep(sc, &sc->queue_mtx, PRIBIO | PDROP, "mdwait", 0);
660 mtx_unlock(&sc->queue_mtx);
661 if (bp->bio_cmd == BIO_GETATTR) {
662 if (sc->fwsectors && sc->fwheads &&
663 (g_handleattr_int(bp, "GEOM::fwsectors",
665 g_handleattr_int(bp, "GEOM::fwheads",
673 error = mdstart_malloc(sc, bp);
676 error = mdstart_preload(sc, bp);
679 error = mdstart_vnode(sc, bp);
682 error = mdstart_swap(sc, bp);
685 panic("Impossible md(type)");
691 bp->bio_completed = bp->bio_length;
692 g_io_deliver(bp, error);
702 /* XXX: LOCK(unique unit numbers) */
703 LIST_FOREACH(sc, &md_softc_list, list) {
704 if (sc->unit == unit)
707 /* XXX: UNLOCK(unique unit numbers) */
717 /* XXX: LOCK(unique unit numbers) */
718 LIST_FOREACH(sc, &md_softc_list, list) {
719 if (sc->unit == unit) {
720 /* XXX: UNLOCK(unique unit numbers) */
728 sc = (struct md_s *)malloc(sizeof *sc, M_MD, M_WAITOK | M_ZERO);
730 bioq_init(&sc->bio_queue);
731 mtx_init(&sc->queue_mtx, "md bio queue", NULL, MTX_DEF);
732 sprintf(sc->name, "md%d", unit);
733 error = kthread_create(md_kthread, sc, &sc->procp, 0, 0,"%s", sc->name);
738 LIST_INSERT_HEAD(&md_softc_list, sc, list);
739 /* XXX: UNLOCK(unique unit numbers) */
744 mdinit(struct md_s *sc)
748 struct g_provider *pp;
752 gp = g_new_geomf(&g_md_class, "md%d", sc->unit);
754 pp = g_new_providerf(gp, "md%d", sc->unit);
755 pp->mediasize = sc->mediasize;
756 pp->sectorsize = sc->sectorsize;
759 g_error_provider(pp, 0);
765 * XXX: we should check that the range they feed us is mapped.
766 * XXX: we should implement read-only.
770 mdcreate_preload(struct md_s *sc, struct md_ioctl *mdio)
773 if (mdio->md_options & ~(MD_AUTOUNIT | MD_FORCE))
775 sc->flags = mdio->md_options & MD_FORCE;
776 /* Cast to pointer size, then to pointer to avoid warning */
777 sc->pl_ptr = (u_char *)(uintptr_t)mdio->md_base;
778 sc->pl_len = (size_t)sc->mediasize;
784 mdcreate_malloc(struct md_s *sc, struct md_ioctl *mdio)
791 if (mdio->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE))
793 if (mdio->md_sectorsize != 0 && !powerof2(mdio->md_sectorsize))
795 /* Compression doesn't make sense if we have reserved space */
796 if (mdio->md_options & MD_RESERVE)
797 mdio->md_options &= ~MD_COMPRESS;
798 if (mdio->md_fwsectors != 0)
799 sc->fwsectors = mdio->md_fwsectors;
800 if (mdio->md_fwheads != 0)
801 sc->fwheads = mdio->md_fwheads;
802 sc->flags = mdio->md_options & (MD_COMPRESS | MD_FORCE);
803 sc->indir = dimension(sc->mediasize / sc->sectorsize);
804 sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL,
806 if (mdio->md_options & MD_RESERVE) {
809 nsectors = sc->mediasize / sc->sectorsize;
810 for (u = 0; u < nsectors; u++) {
811 sp = (uintptr_t)uma_zalloc(sc->uma, M_NOWAIT | M_ZERO);
813 error = s_write(sc->indir, u, sp);
821 uma_zdestroy(sc->uma);
827 mdsetcred(struct md_s *sc, struct ucred *cred)
833 * Set credits in our softc
838 sc->cred = crhold(cred);
841 * Horrible kludge to establish credentials for NFS XXX.
848 tmpbuf = malloc(sc->sectorsize, M_TEMP, M_WAITOK);
849 bzero(&auio, sizeof(auio));
851 aiov.iov_base = tmpbuf;
852 aiov.iov_len = sc->sectorsize;
853 auio.uio_iov = &aiov;
856 auio.uio_rw = UIO_READ;
857 auio.uio_segflg = UIO_SYSSPACE;
858 auio.uio_resid = aiov.iov_len;
859 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curthread);
860 error = VOP_READ(sc->vnode, &auio, 0, sc->cred);
861 VOP_UNLOCK(sc->vnode, 0, curthread);
862 free(tmpbuf, M_TEMP);
868 mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
874 error = copyinstr(mdio->md_file, sc->file, sizeof(sc->file), NULL);
877 flags = FREAD|FWRITE;
878 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
879 error = vn_open(&nd, &flags, 0, -1);
881 NDFREE(&nd, NDF_ONLY_PNBUF);
882 if (error != EACCES && error != EPERM && error != EROFS)
885 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
886 error = vn_open(&nd, &flags, 0, -1);
888 NDFREE(&nd, NDF_ONLY_PNBUF);
891 if (nd.ni_vp->v_type != VREG ||
892 (error = VOP_GETATTR(nd.ni_vp, &vattr, td->td_ucred, td))) {
893 VOP_UNLOCK(nd.ni_vp, 0, td);
894 (void)vn_close(nd.ni_vp, flags, td->td_ucred, td);
895 return (error ? error : EINVAL);
897 VOP_UNLOCK(nd.ni_vp, 0, td);
899 if (mdio->md_fwsectors != 0)
900 sc->fwsectors = mdio->md_fwsectors;
901 if (mdio->md_fwheads != 0)
902 sc->fwheads = mdio->md_fwheads;
903 sc->flags = mdio->md_options & (MD_FORCE | MD_ASYNC);
904 if (!(flags & FWRITE))
905 sc->flags |= MD_READONLY;
906 sc->vnode = nd.ni_vp;
908 error = mdsetcred(sc, td->td_ucred);
910 (void)vn_close(nd.ni_vp, flags, td->td_ucred, td);
917 md_zapit(void *p, int cancel)
921 g_wither_geom(p, ENXIO);
925 mddestroy(struct md_s *sc, struct thread *td)
930 mtx_destroy(&sc->queue_mtx);
932 sc->gp->softc = NULL;
933 g_waitfor_event(md_zapit, sc->gp, M_WAITOK, sc->gp, NULL);
937 sc->flags |= MD_SHUTDOWN;
939 while (sc->procp != NULL)
940 tsleep(&sc->procp, PRIBIO, "mddestroy", hz / 10);
941 if (sc->vnode != NULL)
942 (void)vn_close(sc->vnode, sc->flags & MD_READONLY ?
943 FREAD : (FREAD|FWRITE), sc->cred, td);
944 if (sc->cred != NULL)
946 if (sc->object != NULL) {
947 vm_object_deallocate(sc->object);
950 destroy_indir(sc, sc->indir);
952 uma_zdestroy(sc->uma);
954 /* XXX: LOCK(unique unit numbers) */
955 LIST_REMOVE(sc, list);
956 /* XXX: UNLOCK(unique unit numbers) */
962 mdcreate_swap(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
970 * Range check. Disallow negative sizes or any size less then the
971 * size of a page. Then round to a page.
973 if (sc->mediasize == 0 || (sc->mediasize % PAGE_SIZE) != 0)
977 * Allocate an OBJT_SWAP object.
979 * Note the truncation.
982 npage = mdio->md_mediasize / PAGE_SIZE;
983 if (mdio->md_fwsectors != 0)
984 sc->fwsectors = mdio->md_fwsectors;
985 if (mdio->md_fwheads != 0)
986 sc->fwheads = mdio->md_fwheads;
987 sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage,
989 if (sc->object == NULL)
991 sc->flags = mdio->md_options & MD_FORCE;
992 if (mdio->md_options & MD_RESERVE) {
993 if (swap_pager_reserve(sc->object, 0, npage) < 0) {
994 vm_object_deallocate(sc->object);
999 error = mdsetcred(sc, td->td_ucred);
1001 vm_object_deallocate(sc->object);
1008 mddetach(int unit, struct thread *td)
1015 if (sc->opencount != 0 && !(sc->flags & MD_FORCE))
1022 return (mddestroy(sc, td));
1024 return (EOPNOTSUPP);
1029 mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
1031 struct md_ioctl *mdio;
1036 printf("mdctlioctl(%s %lx %p %x %p)\n",
1037 devtoname(dev), cmd, addr, flags, td);
1040 * We assert the version number in the individual ioctl
1041 * handlers instead of out here because (a) it is possible we
1042 * may add another ioctl in the future which doesn't read an
1043 * mdio, and (b) the correct return value for an unknown ioctl
1044 * is ENOIOCTL, not EINVAL.
1046 mdio = (struct md_ioctl *)addr;
1049 if (mdio->md_version != MDIOVERSION)
1051 switch (mdio->md_type) {
1060 if (mdio->md_options & MD_AUTOUNIT) {
1062 mdio->md_unit = sc->unit;
1064 sc = mdnew(mdio->md_unit);
1068 sc->type = mdio->md_type;
1069 sc->mediasize = mdio->md_mediasize;
1070 if (mdio->md_sectorsize == 0)
1071 sc->sectorsize = DEV_BSIZE;
1073 sc->sectorsize = mdio->md_sectorsize;
1077 error = mdcreate_malloc(sc, mdio);
1080 error = mdcreate_preload(sc, mdio);
1083 error = mdcreate_vnode(sc, mdio, td);
1086 error = mdcreate_swap(sc, mdio, td);
1096 if (mdio->md_version != MDIOVERSION)
1098 if (mdio->md_mediasize != 0 || mdio->md_options != 0)
1100 return (mddetach(mdio->md_unit, td));
1102 if (mdio->md_version != MDIOVERSION)
1104 sc = mdfind(mdio->md_unit);
1107 mdio->md_type = sc->type;
1108 mdio->md_options = sc->flags;
1109 mdio->md_mediasize = sc->mediasize;
1110 mdio->md_sectorsize = sc->sectorsize;
1111 if (sc->type == MD_VNODE) {
1112 error = copyout(sc->file, mdio->md_file,
1113 strlen(sc->file) + 1);
1119 if (mdio->md_version != MDIOVERSION)
1122 LIST_FOREACH(sc, &md_softc_list, list) {
1123 if (i == MDNPAD - 1)
1124 mdio->md_pad[i] = -1;
1126 mdio->md_pad[i++] = sc->unit;
1128 mdio->md_pad[0] = i - 1;
1137 md_preloaded(u_char *image, size_t length)
1144 sc->type = MD_PRELOAD;
1145 sc->mediasize = length;
1146 sc->sectorsize = DEV_BSIZE;
1148 sc->pl_len = length;
1151 rootdevnames[0] = "ufs:/dev/md0";
1157 g_md_init(struct g_class *mp __unused)
1162 u_char *ptr, *name, *type;
1166 g_topology_unlock();
1168 md_preloaded(mfs_root, MD_ROOT_SIZE*1024);
1170 while ((mod = preload_search_next_name(mod)) != NULL) {
1171 name = (char *)preload_search_info(mod, MODINFO_NAME);
1172 type = (char *)preload_search_info(mod, MODINFO_TYPE);
1177 if (strcmp(type, "md_image") && strcmp(type, "mfs_root"))
1179 c = preload_search_info(mod, MODINFO_ADDR);
1180 ptr = *(u_char **)c;
1181 c = preload_search_info(mod, MODINFO_SIZE);
1183 printf("%s%d: Preloaded image <%s> %d bytes at %p\n",
1184 MD_NAME, mdunits, name, len, ptr);
1185 md_preloaded(ptr, len);
1187 status_dev = make_dev(&mdctl_cdevsw, 0xffff00ff, UID_ROOT, GID_WHEEL,
1193 g_md_fini(struct g_class *mp __unused)
1196 if (status_dev != NULL)
1197 destroy_dev(status_dev);