/*- * Copyright (c) 1994 Bruce D. Evans. * All rights reserved. * * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Copyright (c) 1982, 1986, 1988 Regents of the University of California. * All rights reserved. * * 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: @(#)wd.c 7.2 (Berkeley) 5/9/91 * from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $ * from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91 * from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $ * $Id: subr_diskslice.c,v 1.27 1996/06/17 14:43:45 bde Exp $ */ #include #include #ifdef DEVFS #include #endif #include #include #include #include #include #include #include #include #include #include #include #define b_cylinder b_resid #define TRACE(str) do { if (ds_debug) printf str; } while (0) typedef u_char bool_t; static volatile bool_t ds_debug; static void dsiodone __P((struct buf *bp)); static char *fixlabel __P((char *sname, struct diskslice *sp, struct disklabel *lp, int writeflag)); static void free_ds_label __P((struct diskslices *ssp, int slice)); #ifdef DEVFS static void free_ds_labeldevs __P((struct diskslices *ssp, int slice)); #endif static void partition_info __P((char *sname, int part, struct partition *pp)); static void slice_info __P((char *sname, struct diskslice *sp)); static void set_ds_bad __P((struct diskslices *ssp, int slice, struct dkbad_intern *btp)); static void set_ds_label __P((struct diskslices *ssp, int slice, struct disklabel *lp)); #ifdef DEVFS static void set_ds_labeldevs __P((char *dname, dev_t dev, struct diskslices *ssp)); static void set_ds_labeldevs_unaliased __P((char *dname, dev_t dev, struct diskslices *ssp)); #endif static void set_ds_wlabel __P((struct diskslices *ssp, int slice, int wlabel)); /* * Determine the size of the transfer, and make sure it is * within the boundaries of the partition. Adjust transfer * if needed, and signal errors or early completion. * * XXX TODO: * o Do bad sector remapping. May need to split buffer. * o Split buffers that are too big for the device. * o Check for overflow. * o Finish cleaning this up. */ int dscheck(bp, ssp) struct buf *bp; struct diskslices *ssp; { daddr_t blkno; daddr_t labelsect; struct disklabel *lp; u_long maxsz; char *msg; struct partition *pp; struct diskslice *sp; long sz; if (bp->b_blkno < 0) { Debugger("Slice code got negative blocknumber"); bp->b_error = EINVAL; goto bad; } sp = &ssp->dss_slices[dkslice(bp->b_dev)]; lp = sp->ds_label; sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT; if (lp == NULL) { blkno = bp->b_blkno; labelsect = -LABELSECTOR - 1; maxsz = sp->ds_size; } else { labelsect = lp->d_partitions[LABEL_PART].p_offset; if (labelsect != 0) Debugger("labelsect != 0 in dscheck()"); pp = &lp->d_partitions[dkpart(bp->b_dev)]; blkno = pp->p_offset + bp->b_blkno; maxsz = pp->p_size; if (sp->ds_bad != NULL && ds_debug) { daddr_t newblkno; newblkno = transbad144(sp->ds_bad, blkno); if (newblkno != blkno) printf("should map bad block %lu -> %lu\n", blkno, newblkno); } } /* overwriting disk label ? */ /* XXX should also protect bootstrap in first 8K */ if (blkno <= LABELSECTOR + labelsect && #if LABELSECTOR != 0 bp->b_blkno + sz > LABELSECTOR + labelsect && #endif (bp->b_flags & B_READ) == 0 && sp->ds_wlabel == 0) { bp->b_error = EROFS; goto bad; } #if defined(DOSBBSECTOR) && defined(notyet) /* overwriting master boot record? */ if (blkno <= DOSBBSECTOR && (bp->b_flags & B_READ) == 0 && sp->ds_wlabel == 0) { bp->b_error = EROFS; goto bad; } #endif /* beyond partition? */ if (bp->b_blkno < 0 || bp->b_blkno + sz > maxsz) { /* if exactly at end of disk, return an EOF */ if (bp->b_blkno == maxsz) { bp->b_resid = bp->b_bcount; return (0); } /* or truncate if part of it fits */ sz = maxsz - bp->b_blkno; if (sz <= 0) { bp->b_error = EINVAL; goto bad; } bp->b_bcount = sz << DEV_BSHIFT; } /* calculate cylinder for disksort to order transfers with */ bp->b_pblkno = blkno + sp->ds_offset; if (lp == NULL) bp->b_cylinder = 0; /* XXX always 0 would be better */ else bp->b_cylinder = bp->b_pblkno / lp->d_secpercyl; /* * Snoop on label accesses if the slice offset is nonzero. Fudge * offsets in the label to keep the in-core label coherent with * the on-disk one. */ if (blkno <= LABELSECTOR + labelsect #if LABELSECTOR != 0 && bp->b_blkno + sz > LABELSECTOR + labelsect #endif && sp->ds_offset != 0) { struct iodone_chain *ic; ic = malloc(sizeof *ic , M_DEVBUF, M_WAITOK); ic->ic_prev_flags = bp->b_flags; ic->ic_prev_iodone = bp->b_iodone; ic->ic_prev_iodone_chain = bp->b_iodone_chain; ic->ic_args[0].ia_long = (LABELSECTOR + labelsect - blkno) << DEV_BSHIFT; ic->ic_args[1].ia_ptr = sp; bp->b_flags |= B_CALL; bp->b_iodone = dsiodone; bp->b_iodone_chain = ic; if (!(bp->b_flags & B_READ)) { /* * XXX even disklabel(8) writes directly so we need * to adjust writes. Perhaps we should drop support * for DIOCWLABEL (always write protect labels) and * require the use of DIOCWDINFO. * * XXX probably need to copy the data to avoid even * temporarily corrupting the in-core copy. */ if (bp->b_vp != NULL) bp->b_vp->v_numoutput++; msg = fixlabel((char *)NULL, sp, (struct disklabel *) (bp->b_data + ic->ic_args[0].ia_long), TRUE); if (msg != NULL) { printf("%s\n", msg); bp->b_error = EROFS; goto bad; } } } return (1); bad: bp->b_flags |= B_ERROR; return (-1); } void dsclose(dev, mode, ssp) dev_t dev; int mode; struct diskslices *ssp; { u_char mask; struct diskslice *sp; sp = &ssp->dss_slices[dkslice(dev)]; mask = 1 << dkpart(dev); switch (mode) { case S_IFBLK: sp->ds_bopenmask &= ~mask; break; case S_IFCHR: sp->ds_copenmask &= ~mask; break; } sp->ds_openmask = sp->ds_bopenmask | sp->ds_copenmask; } void dsgone(sspp) struct diskslices **sspp; { int slice; struct diskslice *sp; struct diskslices *ssp; for (slice = 0, ssp = *sspp; slice < ssp->dss_nslices; slice++) { sp = &ssp->dss_slices[slice]; if (sp->ds_bad != NULL) { free(sp->ds_bad, M_DEVBUF); set_ds_bad(ssp, slice, (struct dkbad_intern *)NULL); } #ifdef DEVFS if (sp->ds_bdev != NULL) devfs_remove_dev(sp->ds_bdev); if (sp->ds_cdev != NULL) devfs_remove_dev(sp->ds_cdev); #endif free_ds_label(ssp, slice); } free(ssp, M_DEVBUF); *sspp = NULL; } /* * For the "write" commands (DIOCSBAD, DIOCSDINFO and DIOCWDINFO), this * is subject to the same restriction as dsopen(). */ int dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom) char *dname; dev_t dev; int cmd; caddr_t data; int flags; struct diskslices **sspp; d_strategy_t *strat; ds_setgeom_t *setgeom; { int error; struct disklabel *lp; int old_wlabel; int slice; struct diskslice *sp; struct diskslices *ssp; slice = dkslice(dev); ssp = *sspp; sp = &ssp->dss_slices[slice]; lp = sp->ds_label; switch (cmd) { case DIOCGDINFO: if (lp == NULL) return (EINVAL); *(struct disklabel *)data = *lp; return (0); #ifdef notyet case DIOCGDINFOP: if (lp == NULL) return (EINVAL); *(struct disklabel **)data = lp; return (0); #endif case DIOCGPART: if (lp == NULL) return (EINVAL); ((struct partinfo *)data)->disklab = lp; ((struct partinfo *)data)->part = &lp->d_partitions[dkpart(dev)]; return (0); case DIOCGSLICEINFO: *(struct diskslices *)data = *ssp; return (0); case DIOCSBAD: if (slice == WHOLE_DISK_SLICE) return (ENODEV); if (!(flags & FWRITE)) return (EBADF); if (lp == NULL) return (EINVAL); if (sp->ds_bad != NULL) free(sp->ds_bad, M_DEVBUF); set_ds_bad(ssp, slice, internbad144((struct dkbad *)data, lp)); return (0); case DIOCSDINFO: if (slice == WHOLE_DISK_SLICE) return (ENODEV); if (!(flags & FWRITE)) return (EBADF); lp = malloc(sizeof *lp, M_DEVBUF, M_WAITOK); if (sp->ds_label == NULL) bzero(lp, sizeof *lp); else bcopy(sp->ds_label, lp, sizeof *lp); error = setdisklabel(lp, (struct disklabel *)data, sp->ds_label != NULL ? sp->ds_openmask : (u_long)0); /* XXX why doesn't setdisklabel() check this? */ if (error == 0 && lp->d_partitions[RAW_PART].p_offset != 0) error = EINVAL; #if 0 /* XXX */ if (error != 0 && setgeom != NULL) error = setgeom(lp); #endif if (error != 0) { free(lp, M_DEVBUF); return (error); } free_ds_label(ssp, slice); set_ds_label(ssp, slice, lp); #ifdef DEVFS set_ds_labeldevs(dname, dev, ssp); #endif return (0); case DIOCSYNCSLICEINFO: if (slice != WHOLE_DISK_SLICE || dkpart(dev) != RAW_PART) return (EINVAL); if (!*(int *)data) for (slice = 0; slice < ssp->dss_nslices; slice++) { u_char openmask; openmask = ssp->dss_slices[slice].ds_openmask; if (openmask && (slice != WHOLE_DISK_SLICE || openmask & ~(1 << RAW_PART))) return (EBUSY); } /* * Temporarily forget the current slices struct and read * the current one. * XXX should wait for current accesses on this disk to * complete, then lock out future accesses and opens. */ *sspp = NULL; lp = malloc(sizeof *lp, M_DEVBUF, M_WAITOK); *lp = *ssp->dss_slices[WHOLE_DISK_SLICE].ds_label; error = dsopen(dname, dev, ssp->dss_slices[WHOLE_DISK_SLICE].ds_copenmask & (1 << RAW_PART) ? S_IFCHR : S_IFBLK, sspp, lp, strat, setgeom, ssp->dss_bdevsw, ssp->dss_cdevsw); if (error != 0) { free(lp, M_DEVBUF); *sspp = ssp; return (error); } /* * Reopen everything. This is a no-op except in the "force" * case and when the raw bdev and cdev are both open. Abort * if anything fails. */ for (slice = 0; slice < ssp->dss_nslices; slice++) { u_char openmask; int part; for (openmask = ssp->dss_slices[slice].ds_bopenmask, part = 0; openmask; openmask >>= 1, part++) { if (!(openmask & 1)) continue; error = dsopen(dname, dkmodslice(dkmodpart(dev, part), slice), S_IFBLK, sspp, lp, strat, setgeom, ssp->dss_bdevsw, ssp->dss_cdevsw); if (error != 0) { /* XXX should free devfs toks. */ free(lp, M_DEVBUF); /* XXX should restore devfs toks. */ *sspp = ssp; return (EBUSY); } } for (openmask = ssp->dss_slices[slice].ds_copenmask, part = 0; openmask; openmask >>= 1, part++) { if (!(openmask & 1)) continue; error = dsopen(dname, dkmodslice(dkmodpart(dev, part), slice), S_IFCHR, sspp, lp, strat, setgeom, ssp->dss_bdevsw, ssp->dss_cdevsw); if (error != 0) { /* XXX should free devfs toks. */ free(lp, M_DEVBUF); /* XXX should restore devfs toks. */ *sspp = ssp; return (EBUSY); } } } /* XXX devfs tokens? */ free(lp, M_DEVBUF); dsgone(&ssp); return (0); case DIOCWDINFO: error = dsioctl(dname, dev, DIOCSDINFO, data, flags, &ssp, strat, setgeom); if (error != 0) return (error); /* * XXX this used to hack on dk_openpart to fake opening * partition 0 in case that is used instead of dkpart(dev). */ old_wlabel = sp->ds_wlabel; set_ds_wlabel(ssp, slice, TRUE); error = writedisklabel(dev, strat, sp->ds_label); /* XXX should invalidate in-core label if write failed. */ set_ds_wlabel(ssp, slice, old_wlabel); return (error); case DIOCWLABEL: if (slice == WHOLE_DISK_SLICE) return (ENODEV); if (!(flags & FWRITE)) return (EBADF); set_ds_wlabel(ssp, slice, *(int *)data != 0); return (0); default: return (-1); } } static void dsiodone(bp) struct buf *bp; { struct iodone_chain *ic; char *msg; ic = bp->b_iodone_chain; bp->b_flags = (ic->ic_prev_flags & B_CALL) | (bp->b_flags & ~(B_CALL | B_DONE)); bp->b_iodone = ic->ic_prev_iodone; bp->b_iodone_chain = ic->ic_prev_iodone_chain; if (!(bp->b_flags & B_READ) || (!(bp->b_flags & B_ERROR) && bp->b_error == 0)) { msg = fixlabel((char *)NULL, ic->ic_args[1].ia_ptr, (struct disklabel *) (bp->b_data + ic->ic_args[0].ia_long), FALSE); if (msg != NULL) printf("%s\n", msg); } free(ic, M_DEVBUF); biodone(bp); } int dsisopen(ssp) struct diskslices *ssp; { int slice; if (ssp == NULL) return (0); for (slice = 0; slice < ssp->dss_nslices; slice++) if (ssp->dss_slices[slice].ds_openmask) return (1); return (0); } char * dsname(dname, unit, slice, part, partname) char *dname; int unit; int slice; int part; char *partname; { static char name[32]; if (strlen(dname) > 16) dname = "nametoolong"; sprintf(name, "%s%d", dname, unit); partname[0] = '\0'; if (slice != WHOLE_DISK_SLICE || part != RAW_PART) { partname[0] = 'a' + part; partname[1] = '\0'; if (slice != COMPATIBILITY_SLICE) sprintf(name + strlen(name), "s%d", slice - 1); } return (name); } /* * This should only be called when the unit is inactive and the strategy * routine should not allow it to become active unless we call it. Our * strategy routine must be special to allow activity. */ int dsopen(dname, dev, mode, sspp, lp, strat, setgeom, bdevsw, cdevsw) char *dname; dev_t dev; int mode; struct diskslices **sspp; struct disklabel *lp; d_strategy_t *strat; ds_setgeom_t *setgeom; struct bdevsw *bdevsw; struct cdevsw *cdevsw; { int error; struct disklabel *lp1; char *msg; u_char mask; #ifdef DEVFS int mynor; #endif bool_t need_init; int part; char partname[2]; int slice; char *sname; struct diskslice *sp; struct diskslices *ssp; int unit; /* * XXX reinitialize the slice table unless there is an open device * on the unit. This should only be done if the media has changed. */ ssp = *sspp; need_init = !dsisopen(ssp); if (ssp != NULL && need_init) dsgone(sspp); if (need_init) { TRACE(("dsinit\n")); error = dsinit(dname, dev, strat, lp, sspp); if (error != 0) { dsgone(sspp); return (error); } lp->d_npartitions = RAW_PART + 1; lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; ssp = *sspp; #ifdef DEVFS ssp->dss_bdevsw = bdevsw; ssp->dss_cdevsw = cdevsw; #endif /* * If there are no real slices, then make the compatiblity * slice cover the whole disk. */ if (ssp->dss_nslices == BASE_SLICE) ssp->dss_slices[COMPATIBILITY_SLICE].ds_size = lp->d_secperunit; /* Point the compatibility slice at the BSD slice, if any. */ for (slice = BASE_SLICE, sp = &ssp->dss_slices[BASE_SLICE]; slice < ssp->dss_nslices; slice++, sp++) if (sp->ds_type == DOSPTYP_386BSD /* XXX */) { ssp->dss_first_bsd_slice = slice; ssp->dss_slices[COMPATIBILITY_SLICE].ds_offset = sp->ds_offset; ssp->dss_slices[COMPATIBILITY_SLICE].ds_size = sp->ds_size; ssp->dss_slices[COMPATIBILITY_SLICE].ds_type = sp->ds_type; break; } lp1 = malloc(sizeof *lp1, M_DEVBUF, M_WAITOK); *lp1 = *lp; /* * Initialize defaults for the label for the whole disk so * that it can be used as a template for disklabel(8). * d_rpm = 3600 is unlikely to be correct for a modern * disk, but d_rpm is normally irrelevant. */ if (lp1->d_rpm == 0) lp1->d_rpm = 3600; if (lp1->d_interleave == 0) lp1->d_interleave = 1; if (lp1->d_npartitions == 0) lp1->d_npartitions = MAXPARTITIONS; if (lp1->d_bbsize == 0) lp1->d_bbsize = BBSIZE; if (lp1->d_sbsize == 0) lp1->d_sbsize = SBSIZE; ssp->dss_slices[WHOLE_DISK_SLICE].ds_label = lp1; ssp->dss_slices[WHOLE_DISK_SLICE].ds_wlabel = TRUE; if (setgeom != NULL) { error = setgeom(lp); if (error != 0) { dsgone(sspp); return (error); } } } slice = dkslice(dev); if (slice >= ssp->dss_nslices) return (ENXIO); sp = &ssp->dss_slices[slice]; part = dkpart(dev); unit = dkunit(dev); #ifdef DEVFS if (slice >= BASE_SLICE && sp->ds_bdev == NULL && sp->ds_size != 0) { mynor = minor(dkmodpart(dev, RAW_PART)); sname = dsname(dname, unit, slice, RAW_PART, partname); sp->ds_bdev = devfs_add_devswf(bdevsw, mynor, DV_BLK, UID_ROOT, GID_OPERATOR, 0640, "%s", sname); sp->ds_cdev = devfs_add_devswf(cdevsw, mynor, DV_CHR, UID_ROOT, GID_OPERATOR, 0640, "r%s", sname); } #endif if (sp->ds_label == NULL) { set_ds_wlabel(ssp, slice, TRUE); /* XXX invert */ lp1 = malloc(sizeof *lp1, M_DEVBUF, M_WAITOK); *lp1 = *lp; lp = lp1; TRACE(("readdisklabel\n")); msg = readdisklabel(dkmodpart(dev, RAW_PART), strat, lp); #if 0 /* XXX */ if (msg == NULL && setgeom != NULL && setgeom(lp) != 0) msg = "setgeom failed"; #endif sname = dsname(dname, unit, slice, RAW_PART, partname); if (msg == NULL) msg = fixlabel(sname, sp, lp, FALSE); if (msg != NULL) { free(lp, M_DEVBUF); if (sp->ds_type == DOSPTYP_386BSD /* XXX */) log(LOG_WARNING, "%s: cannot find label (%s)\n", sname, msg); if (part == RAW_PART) goto out; return (EINVAL); /* XXX needs translation */ } if (lp->d_flags & D_BADSECT) { struct dkbad *btp; btp = malloc(sizeof *btp, M_DEVBUF, M_WAITOK); TRACE(("readbad144\n")); msg = readbad144(dev, strat, lp, btp); if (msg != NULL) { log(LOG_WARNING, "%s: cannot find bad sector table (%s)\n", sname, msg); free(btp, M_DEVBUF); free(lp, M_DEVBUF); if (part == RAW_PART) goto out; return (EINVAL); /* XXX needs translation */ } set_ds_bad(ssp, slice, internbad144(btp, lp)); free(btp, M_DEVBUF); if (sp->ds_bad == NULL) { free(lp, M_DEVBUF); if (part == RAW_PART) goto out; return (EINVAL); /* XXX needs translation */ } } set_ds_label(ssp, slice, lp); #ifdef DEVFS set_ds_labeldevs(dname, dev, ssp); #endif set_ds_wlabel(ssp, slice, FALSE); } if (part != RAW_PART && (sp->ds_label == NULL || part >= sp->ds_label->d_npartitions)) return (EINVAL); /* XXX needs translation */ out: mask = 1 << part; switch (mode) { case S_IFBLK: sp->ds_bopenmask |= mask; break; case S_IFCHR: sp->ds_copenmask |= mask; break; } sp->ds_openmask = sp->ds_bopenmask | sp->ds_copenmask; return (0); } int dssize(dev, sspp, dopen, dclose) dev_t dev; struct diskslices **sspp; d_open_t dopen; d_close_t dclose; { struct disklabel *lp; int part; int slice; struct diskslices *ssp; slice = dkslice(dev); part = dkpart(dev); ssp = *sspp; if (ssp == NULL || slice >= ssp->dss_nslices || !(ssp->dss_slices[slice].ds_bopenmask & (1 << part))) { if (dopen(dev, FREAD, S_IFBLK, (struct proc *)NULL) != 0) return (-1); dclose(dev, FREAD, S_IFBLK, (struct proc *)NULL); ssp = *sspp; } lp = ssp->dss_slices[slice].ds_label; if (lp == NULL) return (-1); return ((int)lp->d_partitions[part].p_size); } static void free_ds_label(ssp, slice) struct diskslices *ssp; int slice; { struct disklabel *lp; struct diskslice *sp; sp = &ssp->dss_slices[slice]; lp = sp->ds_label; if (lp == NULL) return; #ifdef DEVFS free_ds_labeldevs(ssp, slice); if (slice == COMPATIBILITY_SLICE) free_ds_labeldevs(ssp, ssp->dss_first_bsd_slice); else if (slice == ssp->dss_first_bsd_slice) free_ds_labeldevs(ssp, COMPATIBILITY_SLICE); #endif free(lp, M_DEVBUF); set_ds_label(ssp, slice, (struct disklabel *)NULL); } #ifdef DEVFS static void free_ds_labeldevs(ssp, slice) struct diskslices *ssp; int slice; { struct disklabel *lp; int part; struct diskslice *sp; sp = &ssp->dss_slices[slice]; lp = sp->ds_label; if (lp == NULL) return; for (part = 0; part < lp->d_npartitions; part++) { if (sp->ds_bdevs[part] != NULL) { devfs_remove_dev(sp->ds_bdevs[part]); sp->ds_bdevs[part] = NULL; } if (sp->ds_cdevs[part] != NULL) { devfs_remove_dev(sp->ds_cdevs[part]); sp->ds_cdevs[part] = NULL; } } } #endif static char * fixlabel(sname, sp, lp, writeflag) char *sname; struct diskslice *sp; struct disklabel *lp; int writeflag; { u_long end; u_long offset; int part; struct partition *pp; u_long start; bool_t warned; /* These errors "can't happen" so don't bother reporting details. */ if (lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC) return ("fixlabel: invalid magic"); if (dkcksum(lp) != 0) return ("fixlabel: invalid checksum"); pp = &lp->d_partitions[RAW_PART]; if (writeflag) { start = 0; offset = sp->ds_offset; } else { start = sp->ds_offset; offset = -sp->ds_offset; } if (pp->p_offset != start) { if (sname != NULL) { printf( "%s: rejecting BSD label: raw partition offset != slice offset\n", sname); slice_info(sname, sp); partition_info(sname, RAW_PART, pp); } return ("fixlabel: raw partition offset != slice offset"); } if (pp->p_size != sp->ds_size) { if (sname != NULL) { printf("%s: raw partition size != slice size\n", sname); slice_info(sname, sp); partition_info(sname, RAW_PART, pp); } if (pp->p_size > sp->ds_size) { if (sname == NULL) return ("fixlabel: raw partition size > slice size"); printf("%s: truncating raw partition\n", sname); pp->p_size = sp->ds_size; } } end = start + sp->ds_size; if (start > end) return ("fixlabel: slice wraps"); if (lp->d_secpercyl <= 0) return ("fixlabel: d_secpercyl <= 0"); pp -= RAW_PART; warned = FALSE; for (part = 0; part < lp->d_npartitions; part++, pp++) { if (pp->p_offset != 0 || pp->p_size != 0) { if (pp->p_offset < start || pp->p_offset + pp->p_size > end || pp->p_offset + pp->p_size < pp->p_offset) { if (sname != NULL) { printf( "%s: rejecting partition in BSD label: it isn't entirely within the slice\n", sname); if (!warned) { slice_info(sname, sp); warned = TRUE; } partition_info(sname, part, pp); } /* XXX else silently discard junk. */ bzero(pp, sizeof *pp); } else pp->p_offset += offset; } } lp->d_ncylinders = sp->ds_size / lp->d_secpercyl; lp->d_secperunit = sp->ds_size; lp->d_checksum = 0; lp->d_checksum = dkcksum(lp); return (NULL); } static void partition_info(sname, part, pp) char *sname; int part; struct partition *pp; { printf("%s%c: start %lu, end %lu, size %lu\n", sname, 'a' + part, pp->p_offset, pp->p_offset + pp->p_size - 1, pp->p_size); } static void slice_info(sname, sp) char *sname; struct diskslice *sp; { printf("%s: start %lu, end %lu, size %lu\n", sname, sp->ds_offset, sp->ds_offset + sp->ds_size - 1, sp->ds_size); } /* * Most changes to ds_bad, ds_label and ds_wlabel are made using the * following functions to ensure coherency of the compatibility slice * with the first BSD slice. The openmask fields are _not_ shared and * the other fields (ds_offset and ds_size) aren't changed after they * are initialized. */ static void set_ds_bad(ssp, slice, btp) struct diskslices *ssp; int slice; struct dkbad_intern *btp; { ssp->dss_slices[slice].ds_bad = btp; if (slice == COMPATIBILITY_SLICE) ssp->dss_slices[ssp->dss_first_bsd_slice].ds_bad = btp; else if (slice == ssp->dss_first_bsd_slice) ssp->dss_slices[COMPATIBILITY_SLICE].ds_bad = btp; } static void set_ds_label(ssp, slice, lp) struct diskslices *ssp; int slice; struct disklabel *lp; { ssp->dss_slices[slice].ds_label = lp; if (slice == COMPATIBILITY_SLICE) ssp->dss_slices[ssp->dss_first_bsd_slice].ds_label = lp; else if (slice == ssp->dss_first_bsd_slice) ssp->dss_slices[COMPATIBILITY_SLICE].ds_label = lp; } #ifdef DEVFS static void set_ds_labeldevs(dname, dev, ssp) char *dname; dev_t dev; struct diskslices *ssp; { int slice; set_ds_labeldevs_unaliased(dname, dev, ssp); slice = dkslice(dev); if (slice == COMPATIBILITY_SLICE) set_ds_labeldevs_unaliased(dname, dkmodslice(dev, ssp->dss_first_bsd_slice), ssp); else if (slice == ssp->dss_first_bsd_slice) set_ds_labeldevs_unaliased(dname, dkmodslice(dev, COMPATIBILITY_SLICE), ssp); } static void set_ds_labeldevs_unaliased(dname, dev, ssp) char *dname; dev_t dev; struct diskslices *ssp; { struct disklabel *lp; int mynor; int part; char partname[2]; struct partition *pp; int slice; char *sname; struct diskslice *sp; slice = dkslice(dev); sp = &ssp->dss_slices[slice]; if (sp->ds_size == 0) return; lp = sp->ds_label; for (part = 0; part < lp->d_npartitions; part++) { pp = &lp->d_partitions[part]; if (pp->p_size == 0) continue; sname = dsname(dname, dkunit(dev), slice, part, partname); if (part == RAW_PART && sp->ds_bdev != NULL) { sp->ds_bdevs[part] = devfs_link(sp->ds_bdev, "%s%s", sname, partname); sp->ds_cdevs[part] = devfs_link(sp->ds_cdev, "r%s%s", sname, partname); } else { mynor = minor(dkmodpart(dev, part)); sp->ds_bdevs[part] = devfs_add_devswf(ssp->dss_bdevsw, mynor, DV_BLK, UID_ROOT, GID_OPERATOR, 0640, "%s%s", sname, partname); sp->ds_cdevs[part] = devfs_add_devswf(ssp->dss_cdevsw, mynor, DV_CHR, UID_ROOT, GID_OPERATOR, 0640, "r%s%s", sname, partname); } } } #endif /* DEVFS */ static void set_ds_wlabel(ssp, slice, wlabel) struct diskslices *ssp; int slice; int wlabel; { ssp->dss_slices[slice].ds_wlabel = wlabel; if (slice == COMPATIBILITY_SLICE) ssp->dss_slices[ssp->dss_first_bsd_slice].ds_wlabel = wlabel; else if (slice == ssp->dss_first_bsd_slice) ssp->dss_slices[COMPATIBILITY_SLICE].ds_wlabel = wlabel; }