/* * ---------------------------------------------------------------------------- * "THE BEER-WARE LICENSE" (Revision 42): * wrote this file. As long as you retain this notice you * can do whatever you want with this stuff. If we meet some day, and you think * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * * $FreeBSD$ * */ /* * The following functions are based in the vn(4) driver: mdstart_swap(), * mdstart_vnode(), mdcreate_swap(), mdcreate_vnode() and mddestroy(), * and as such under the following copyright: * * Copyright (c) 1988 University of Utah. * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: Utah Hdr: vn.c 1.13 94/04/02 * * from: @(#)vn.c 8.6 (Berkeley) 4/1/94 * From: src/sys/dev/vn/vn.c,v 1.122 2000/12/16 16:06:03 */ #include "opt_mfs.h" /* We have adopted some tasks from MFS */ #include "opt_md.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef MD_NSECT #define MD_NSECT (10000 * 2) #endif MALLOC_DEFINE(M_MD, "MD disk", "Memory Disk"); MALLOC_DEFINE(M_MDSECT, "MD sectors", "Memory Disk Sectors"); static int md_debug; SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, ""); #if defined(MFS_ROOT) && !defined(MD_ROOT) #define MD_ROOT MFS_ROOT #warning "option MFS_ROOT has been superceeded by MD_ROOT" #endif #if defined(MFS_ROOT_SIZE) && !defined(MD_ROOT_SIZE) #define MD_ROOT_SIZE MFS_ROOT_SIZE #warning "option MFS_ROOT_SIZE has been superceeded by MD_ROOT_SIZE" #endif #if defined(MD_ROOT) && defined(MD_ROOT_SIZE) /* Image gets put here: */ static u_char mfs_root[MD_ROOT_SIZE*1024] = "MFS Filesystem goes here"; static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here"; #endif static int mdrootready; static int mdunits; #define CDEV_MAJOR 95 static d_strategy_t mdstrategy; static d_open_t mdopen; static d_ioctl_t mdioctl, mdctlioctl; static struct cdevsw md_cdevsw = { /* open */ mdopen, /* close */ nullclose, /* read */ physread, /* write */ physwrite, /* ioctl */ mdioctl, /* poll */ nopoll, /* mmap */ nommap, /* strategy */ mdstrategy, /* name */ "md", /* maj */ CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ D_DISK | D_CANFREE | D_MEMDISK, }; static struct cdevsw mdctl_cdevsw = { /* open */ nullopen, /* close */ nullclose, /* read */ noread, /* write */ nowrite, /* ioctl */ mdctlioctl, /* poll */ nopoll, /* mmap */ nommap, /* strategy */ nostrategy, /* name */ "md", /* maj */ CDEV_MAJOR }; static struct cdevsw mddisk_cdevsw; static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(&md_softc_list); struct md_s { int unit; LIST_ENTRY(md_s) list; struct devstat stats; struct bio_queue_head bio_queue; struct disk disk; dev_t dev; int busy; enum md_types type; unsigned nsect; unsigned secsize; unsigned flags; /* MD_MALLOC related fields */ unsigned nsecp; u_char **secp; /* MD_PRELOAD related fields */ u_char *pl_ptr; unsigned pl_len; /* MD_VNODE related fields */ struct vnode *vnode; struct ucred *cred; /* MD_OBJET related fields */ vm_object_t object; }; static int mdopen(dev_t dev, int flag, int fmt, struct proc *p) { struct md_s *sc; struct disklabel *dl; if (md_debug) printf("mdopen(%s %x %x %p)\n", devtoname(dev), flag, fmt, p); sc = dev->si_drv1; dl = &sc->disk.d_label; bzero(dl, sizeof(*dl)); dl->d_secsize = sc->secsize; dl->d_nsectors = sc->nsect > 1024 ? 1024 : sc->nsect; dl->d_ntracks = 1; dl->d_secpercyl = dl->d_nsectors * dl->d_ntracks; dl->d_secperunit = sc->nsect; dl->d_ncylinders = dl->d_secperunit / dl->d_secpercyl; return (0); } static int mdioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p) { if (md_debug) printf("mdioctl(%s %lx %p %x %p)\n", devtoname(dev), cmd, addr, flags, p); return (ENOIOCTL); } static void mdstart_malloc(struct md_s *sc) { int i; struct bio *bp; devstat_trans_flags dop; u_char *secp, **secpp, *dst; unsigned secno, nsec, secval, uc; for (;;) { /* XXX: LOCK(unique unit numbers) */ bp = bioq_first(&sc->bio_queue); if (bp) bioq_remove(&sc->bio_queue, bp); /* XXX: UNLOCK(unique unit numbers) */ if (!bp) break; devstat_start_transaction(&sc->stats); if (bp->bio_cmd == BIO_DELETE) dop = DEVSTAT_NO_DATA; else if (bp->bio_cmd == BIO_READ) dop = DEVSTAT_READ; else dop = DEVSTAT_WRITE; nsec = bp->bio_bcount / DEV_BSIZE; secno = bp->bio_pblkno; dst = bp->bio_data; while (nsec--) { if (secno < sc->nsecp) { secpp = &sc->secp[secno]; if ((uintptr_t)*secpp > 255) { secp = *secpp; secval = 0; } else { secp = 0; secval = (uintptr_t) *secpp; } } else { secpp = 0; secp = 0; secval = 0; } if (md_debug > 2) printf("%x %p %p %d\n", bp->bio_flags, secpp, secp, secval); if (bp->bio_cmd == BIO_DELETE) { if (secpp && !(sc->flags & MD_RESERVE)) { if (secp) FREE(secp, M_MDSECT); *secpp = 0; } } else if (bp->bio_cmd == BIO_READ) { if (secp) { bcopy(secp, dst, DEV_BSIZE); } else if (secval) { for (i = 0; i < DEV_BSIZE; i++) dst[i] = secval; } else { bzero(dst, DEV_BSIZE); } } else { if (sc->flags & MD_COMPRESS) { uc = dst[0]; for (i = 1; i < DEV_BSIZE; i++) if (dst[i] != uc) break; } else { i = 0; uc = 0; } if (i == DEV_BSIZE && !uc) { if (secp) FREE(secp, M_MDSECT); if (secpp) *secpp = (u_char *)(uintptr_t)uc; } else { if (!secpp) { MALLOC(secpp, u_char **, (secno + nsec + 1) * sizeof(u_char *), M_MD, M_WAITOK | M_ZERO); bcopy(sc->secp, secpp, sc->nsecp * sizeof(u_char *)); FREE(sc->secp, M_MD); sc->secp = secpp; sc->nsecp = secno + nsec + 1; secpp = &sc->secp[secno]; } if (i == DEV_BSIZE) { if (secp) FREE(secp, M_MDSECT); *secpp = (u_char *)(uintptr_t)uc; } else { if (!secp) MALLOC(secp, u_char *, DEV_BSIZE, M_MDSECT, M_WAITOK); bcopy(dst, secp, DEV_BSIZE); *secpp = secp; } } } secno++; dst += DEV_BSIZE; } bp->bio_resid = 0; devstat_end_transaction_bio(&sc->stats, bp); biodone(bp); } return; } static void mdstart_preload(struct md_s *sc) { struct bio *bp; devstat_trans_flags dop; for (;;) { /* XXX: LOCK(unique unit numbers) */ bp = bioq_first(&sc->bio_queue); if (bp) bioq_remove(&sc->bio_queue, bp); /* XXX: UNLOCK(unique unit numbers) */ if (!bp) break; devstat_start_transaction(&sc->stats); if (bp->bio_cmd == BIO_DELETE) { dop = DEVSTAT_NO_DATA; } else if (bp->bio_cmd == BIO_READ) { dop = DEVSTAT_READ; bcopy(sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_data, bp->bio_bcount); } else { dop = DEVSTAT_WRITE; bcopy(bp->bio_data, sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_bcount); } bp->bio_resid = 0; devstat_end_transaction_bio(&sc->stats, bp); biodone(bp); } return; } static void mdstart_vnode(struct md_s *sc) { int error; struct bio *bp; struct uio auio; struct iovec aiov; struct mount *mp; /* * VNODE I/O * * If an error occurs, we set BIO_ERROR but we do not set * B_INVAL because (for a write anyway), the buffer is * still valid. */ for (;;) { /* XXX: LOCK(unique unit numbers) */ bp = bioq_first(&sc->bio_queue); if (bp) bioq_remove(&sc->bio_queue, bp); /* XXX: UNLOCK(unique unit numbers) */ if (!bp) break; devstat_start_transaction(&sc->stats); bzero(&auio, sizeof(auio)); aiov.iov_base = bp->bio_data; aiov.iov_len = bp->bio_bcount; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = (vm_ooffset_t)bp->bio_pblkno * sc->secsize; auio.uio_segflg = UIO_SYSSPACE; if(bp->bio_cmd == BIO_READ) auio.uio_rw = UIO_READ; else auio.uio_rw = UIO_WRITE; auio.uio_resid = bp->bio_bcount; auio.uio_procp = curproc; if (VOP_ISLOCKED(sc->vnode, NULL)) vprint("unexpected vn driver lock", sc->vnode); if (bp->bio_cmd == BIO_READ) { vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curproc); error = VOP_READ(sc->vnode, &auio, 0, sc->cred); } else { (void) vn_start_write(sc->vnode, &mp, V_WAIT); vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curproc); error = VOP_WRITE(sc->vnode, &auio, 0, sc->cred); vn_finished_write(mp); } VOP_UNLOCK(sc->vnode, 0, curproc); bp->bio_resid = auio.uio_resid; if (error) { bp->bio_error = error; bp->bio_flags |= BIO_ERROR; } devstat_end_transaction_bio(&sc->stats, bp); biodone(bp); } return; } static void mdstart_swap(struct md_s *sc) { struct bio *bp; for (;;) { /* XXX: LOCK(unique unit numbers) */ bp = bioq_first(&sc->bio_queue); if (bp) bioq_remove(&sc->bio_queue, bp); /* XXX: UNLOCK(unique unit numbers) */ if (!bp) break; #if 0 devstat_start_transaction(&sc->stats); #endif if ((bp->bio_cmd == BIO_DELETE) && (sc->flags & MD_RESERVE)) biodone(bp); else vm_pager_strategy(sc->object, bp); #if 0 devstat_end_transaction_bio(&sc->stats, bp); #endif } return; } static void mdstrategy(struct bio *bp) { struct md_s *sc; if (md_debug > 1) printf("mdstrategy(%p) %s %x, %d, %ld, %p)\n", bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, bp->bio_bcount / DEV_BSIZE, bp->bio_data); sc = bp->bio_dev->si_drv1; /* XXX: LOCK(sc->lock) */ bioqdisksort(&sc->bio_queue, bp); /* XXX: UNLOCK(sc->lock) */ if (atomic_cmpset_int(&sc->busy, 0, 1) == 0) return; switch (sc->type) { case MD_MALLOC: mdstart_malloc(sc); break; case MD_PRELOAD: mdstart_preload(sc); break; case MD_VNODE: mdstart_vnode(sc); break; case MD_SWAP: mdstart_swap(sc); break; default: panic("Impossible md(type)"); break; } sc->busy = 0; } static struct md_s * mdfind(int unit) { struct md_s *sc; /* XXX: LOCK(unique unit numbers) */ LIST_FOREACH(sc, &md_softc_list, list) { if (sc->unit == unit) break; } /* XXX: UNLOCK(unique unit numbers) */ return (sc); } static struct md_s * mdnew(int unit) { struct md_s *sc; int max = -1; /* XXX: LOCK(unique unit numbers) */ LIST_FOREACH(sc, &md_softc_list, list) { if (sc->unit == unit) { /* XXX: UNLOCK(unique unit numbers) */ return (NULL); } if (sc->unit > max) max = sc->unit; } if (unit == -1) unit = max + 1; if (unit > DKMAXUNIT) return (NULL); MALLOC(sc, struct md_s *,sizeof(*sc), M_MD, M_WAITOK | M_ZERO); sc->unit = unit; LIST_INSERT_HEAD(&md_softc_list, sc, list); /* XXX: UNLOCK(unique unit numbers) */ return (sc); } static void mddelete(struct md_s *sc) { /* XXX: LOCK(unique unit numbers) */ LIST_REMOVE(sc, list); /* XXX: UNLOCK(unique unit numbers) */ FREE(sc, M_MD); } static void mdinit(struct md_s *sc) { bioq_init(&sc->bio_queue); devstat_add_entry(&sc->stats, "md", sc->unit, DEV_BSIZE, DEVSTAT_NO_ORDERED_TAGS, DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, DEVSTAT_PRIORITY_OTHER); sc->dev = disk_create(sc->unit, &sc->disk, 0, &md_cdevsw, &mddisk_cdevsw); sc->dev->si_drv1 = sc; } static int mdcreate_preload(struct md_ioctl *mdio) { struct md_s *sc; if (mdio->md_size == 0) return(EINVAL); if (mdio->md_options & ~(MD_AUTOUNIT)) return(EINVAL); if (mdio->md_options & MD_AUTOUNIT) { sc = mdnew(-1); if (sc == NULL) return (ENOMEM); mdio->md_unit = sc->unit; } else { sc = mdnew(mdio->md_unit); if (sc == NULL) return (EBUSY); } sc->type = MD_PRELOAD; sc->secsize = DEV_BSIZE; sc->nsect = mdio->md_size; sc->pl_ptr = (u_char *)mdio->md_base; sc->pl_len = (mdio->md_size << DEV_BSHIFT); mdinit(sc); return (0); } static int mdcreate_malloc(struct md_ioctl *mdio) { struct md_s *sc; unsigned u; if (mdio->md_size == 0) return(EINVAL); if (mdio->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE)) return(EINVAL); /* Compression doesn't make sense if we have reserved space */ if (mdio->md_options & MD_RESERVE) mdio->md_options &= ~MD_COMPRESS; if (mdio->md_options & MD_AUTOUNIT) { sc = mdnew(-1); if (sc == NULL) return (ENOMEM); mdio->md_unit = sc->unit; } else { sc = mdnew(mdio->md_unit); if (sc == NULL) return (EBUSY); } sc->type = MD_MALLOC; sc->secsize = DEV_BSIZE; sc->nsect = mdio->md_size; sc->flags = mdio->md_options & MD_COMPRESS; if (!(mdio->md_options & MD_RESERVE)) { MALLOC(sc->secp, u_char **, sizeof(u_char *), M_MD, M_WAITOK | M_ZERO); sc->nsecp = 1; } else { MALLOC(sc->secp, u_char **, sc->nsect * sizeof(u_char *), M_MD, M_WAITOK | M_ZERO); sc->nsecp = sc->nsect; for (u = 0; u < sc->nsect; u++) MALLOC(sc->secp[u], u_char *, DEV_BSIZE, M_MDSECT, M_WAITOK | M_ZERO); } printf("md%d: Malloc disk\n", sc->unit); mdinit(sc); return (0); } static int mdsetcred(struct md_s *sc, struct ucred *cred) { char *tmpbuf; int error = 0; /* * Set credits in our softc */ if (sc->cred) crfree(sc->cred); sc->cred = crdup(cred); /* * Horrible kludge to establish credentials for NFS XXX. */ if (sc->vnode) { struct uio auio; struct iovec aiov; tmpbuf = malloc(sc->secsize, M_TEMP, M_WAITOK); bzero(&auio, sizeof(auio)); aiov.iov_base = tmpbuf; aiov.iov_len = sc->secsize; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = 0; auio.uio_rw = UIO_READ; auio.uio_segflg = UIO_SYSSPACE; auio.uio_resid = aiov.iov_len; vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY, curproc); error = VOP_READ(sc->vnode, &auio, 0, sc->cred); VOP_UNLOCK(sc->vnode, 0, curproc); free(tmpbuf, M_TEMP); } return (error); } static int mdcreate_vnode(struct md_ioctl *mdio, struct proc *p) { struct md_s *sc; struct vattr vattr; struct nameidata nd; int error, flags; if (mdio->md_options & MD_AUTOUNIT) { sc = mdnew(-1); mdio->md_unit = sc->unit; } else { sc = mdnew(mdio->md_unit); } if (sc == NULL) return (EBUSY); sc->type = MD_VNODE; flags = FREAD|FWRITE; NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, mdio->md_file, p); error = vn_open(&nd, &flags, 0); if (error) { if (error != EACCES && error != EPERM && error != EROFS) return (error); flags &= ~FWRITE; sc->flags |= MD_READONLY; NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, mdio->md_file, p); error = vn_open(&nd, &flags, 0); if (error) return (error); } NDFREE(&nd, NDF_ONLY_PNBUF); if (nd.ni_vp->v_type != VREG || (error = VOP_GETATTR(nd.ni_vp, &vattr, p->p_ucred, p))) { VOP_UNLOCK(nd.ni_vp, 0, p); (void) vn_close(nd.ni_vp, flags, p->p_ucred, p); return (error ? error : EINVAL); } VOP_UNLOCK(nd.ni_vp, 0, p); sc->secsize = DEV_BSIZE; sc->vnode = nd.ni_vp; /* * If the size is specified, override the file attributes. */ if (mdio->md_size) sc->nsect = mdio->md_size; else sc->nsect = vattr.va_size / sc->secsize; /* XXX: round up ? */ error = mdsetcred(sc, p->p_ucred); if (error) { (void) vn_close(nd.ni_vp, flags, p->p_ucred, p); return(error); } mdinit(sc); return (0); } static int mddestroy(struct md_s *sc, struct md_ioctl *mdio, struct proc *p) { unsigned u; if (sc->dev != NULL) disk_destroy(sc->dev); if (sc->vnode != NULL) (void)vn_close(sc->vnode, sc->flags & MD_READONLY ? FREAD : (FREAD|FWRITE), sc->cred, p); if (sc->cred != NULL) crfree(sc->cred); if (sc->object != NULL) vm_pager_deallocate(sc->object); if (sc->secp != NULL) { for (u = 0; u < sc->nsecp; u++) if ((uintptr_t)sc->secp[u] > 255) FREE(sc->secp[u], M_MDSECT); FREE(sc->secp, M_MD); } mddelete(sc); return (0); } static int mdcreate_swap(struct md_ioctl *mdio, struct proc *p) { int error; struct md_s *sc; if (mdio->md_options & MD_AUTOUNIT) { sc = mdnew(-1); mdio->md_unit = sc->unit; } else { sc = mdnew(mdio->md_unit); } if (sc == NULL) return (EBUSY); sc->type = MD_SWAP; /* * Range check. Disallow negative sizes or any size less then the * size of a page. Then round to a page. */ if (mdio->md_size == 0) return(EDOM); /* * Allocate an OBJT_SWAP object. * * sc_secsize is PAGE_SIZE'd * * mdio->size is in DEV_BSIZE'd chunks. * Note the truncation. */ sc->secsize = PAGE_SIZE; sc->nsect = mdio->md_size / (PAGE_SIZE / DEV_BSIZE); sc->object = vm_pager_allocate(OBJT_SWAP, NULL, sc->secsize * (vm_offset_t)sc->nsect, VM_PROT_DEFAULT, 0); if (mdio->md_options & MD_RESERVE) { if (swap_pager_reserve(sc->object, 0, sc->nsect) < 0) { vm_pager_deallocate(sc->object); sc->object = NULL; return(EDOM); } } error = mdsetcred(sc, p->p_ucred); if (error) mddestroy(sc, mdio, p); else mdinit(sc); return(error); } static int mdctlioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p) { struct md_ioctl *mdio; struct md_s *sc; if (md_debug) printf("mdctlioctl(%s %lx %p %x %p)\n", devtoname(dev), cmd, addr, flags, p); mdio = (struct md_ioctl *)addr; switch (cmd) { case MDIOCATTACH: switch (mdio->md_type) { case MD_MALLOC: return(mdcreate_malloc(mdio)); case MD_PRELOAD: return(mdcreate_preload(mdio)); case MD_VNODE: return(mdcreate_vnode(mdio, p)); case MD_SWAP: return(mdcreate_swap(mdio, p)); default: return (EINVAL); } case MDIOCDETACH: if (mdio->md_file != NULL) return(EINVAL); if (mdio->md_size != 0) return(EINVAL); if (mdio->md_options != 0) return(EINVAL); sc = mdfind(mdio->md_unit); if (sc == NULL) return (ENOENT); switch(sc->type) { case MD_VNODE: case MD_SWAP: case MD_MALLOC: case MD_PRELOAD: return(mddestroy(sc, mdio, p)); default: return (EOPNOTSUPP); } default: return (ENOIOCTL); }; return (ENOIOCTL); } static void md_preloaded(u_char *image, unsigned length) { struct md_s *sc; sc = mdnew(-1); if (sc == NULL) return; sc->type = MD_PRELOAD; sc->secsize = DEV_BSIZE; sc->nsect = length / DEV_BSIZE; sc->pl_ptr = image; sc->pl_len = length; if (sc->unit == 0) mdrootready = 1; mdinit(sc); } static void md_drvinit(void *unused) { caddr_t mod; caddr_t c; u_char *ptr, *name, *type; unsigned len; #ifdef MD_ROOT_SIZE md_preloaded(mfs_root, MD_ROOT_SIZE*1024); #endif mod = NULL; while ((mod = preload_search_next_name(mod)) != NULL) { name = (char *)preload_search_info(mod, MODINFO_NAME); type = (char *)preload_search_info(mod, MODINFO_TYPE); if (name == NULL) continue; if (type == NULL) continue; if (strcmp(type, "md_image") && strcmp(type, "mfs_root")) continue; c = preload_search_info(mod, MODINFO_ADDR); ptr = *(u_char **)c; c = preload_search_info(mod, MODINFO_SIZE); len = *(unsigned *)c; printf("md%d: Preloaded image <%s> %d bytes at %p\n", mdunits, name, len, ptr); md_preloaded(ptr, len); } make_dev(&mdctl_cdevsw, 0xffff00ff, UID_ROOT, GID_WHEEL, 0600, "mdctl"); } SYSINIT(mddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR, md_drvinit,NULL) #ifdef MD_ROOT static void md_takeroot(void *junk) { if (mdrootready) rootdevnames[0] = "ufs:/dev/md0c"; } SYSINIT(md_root, SI_SUB_MOUNT_ROOT, SI_ORDER_FIRST, md_takeroot, NULL); #endif