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or a partition is larger than the slice. Now `disklabel -Brw sdX auto' should fail properly on sliced disks without partition of type 165, e.g., on zip disks with the factory default formatting. Previously it set a bogus in-core label for the compatibility slice and used this to corrupt the MBR (the slice has offset 0 and size 0, but setting the label in effect corrupted its size to nonzero). `disklabel -Brw sdX auto' already failed properly on normally (not dangerously dedicated) sliced disks _with_ partition of type 165, because the compatibility slice has a nonzero offset so the MBR remained inaccessible when the size was corrupted. This bug only affected in-core labels. On-disk labels are checked carefully when they read and written.
1072 lines
27 KiB
C
1072 lines
27 KiB
C
/*-
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* Copyright (c) 1994 Bruce D. Evans.
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* All rights reserved.
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*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
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* from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $
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* from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
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* from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
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* $Id: subr_diskslice.c,v 1.37 1997/09/02 20:05:50 bde Exp $
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*/
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/dkbad.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <sys/syslog.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <ufs/ffs/fs.h>
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#define TRACE(str) do { if (ds_debug) printf str; } while (0)
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typedef u_char bool_t;
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static volatile bool_t ds_debug;
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static void dsiodone __P((struct buf *bp));
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static char *fixlabel __P((char *sname, struct diskslice *sp,
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struct disklabel *lp, int writeflag));
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static void free_ds_label __P((struct diskslices *ssp, int slice));
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#ifdef DEVFS
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static void free_ds_labeldevs __P((struct diskslices *ssp, int slice));
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#endif
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static void partition_info __P((char *sname, int part, struct partition *pp));
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static void slice_info __P((char *sname, struct diskslice *sp));
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static void set_ds_bad __P((struct diskslices *ssp, int slice,
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struct dkbad_intern *btp));
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static void set_ds_label __P((struct diskslices *ssp, int slice,
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struct disklabel *lp));
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#ifdef DEVFS
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static void set_ds_labeldevs __P((char *dname, dev_t dev,
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struct diskslices *ssp));
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static void set_ds_labeldevs_unaliased __P((char *dname, dev_t dev,
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struct diskslices *ssp));
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#endif
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static void set_ds_wlabel __P((struct diskslices *ssp, int slice,
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int wlabel));
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/*
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* Determine the size of the transfer, and make sure it is
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* within the boundaries of the partition. Adjust transfer
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* if needed, and signal errors or early completion.
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*
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* XXX TODO:
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* o Do bad sector remapping. May need to split buffer.
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* o Split buffers that are too big for the device.
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* o Check for overflow.
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* o Finish cleaning this up.
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*/
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int
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dscheck(bp, ssp)
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struct buf *bp;
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struct diskslices *ssp;
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{
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daddr_t blkno;
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daddr_t labelsect;
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struct disklabel *lp;
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u_long maxsz;
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char *msg;
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struct partition *pp;
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struct diskslice *sp;
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long sz;
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if (bp->b_blkno < 0) {
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Debugger("Slice code got negative blocknumber");
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bp->b_error = EINVAL;
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goto bad;
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}
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sp = &ssp->dss_slices[dkslice(bp->b_dev)];
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lp = sp->ds_label;
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sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT;
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if (lp == NULL) {
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blkno = bp->b_blkno;
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labelsect = -LABELSECTOR - 1;
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maxsz = sp->ds_size;
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} else {
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labelsect = lp->d_partitions[LABEL_PART].p_offset;
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if (labelsect != 0) Debugger("labelsect != 0 in dscheck()");
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pp = &lp->d_partitions[dkpart(bp->b_dev)];
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blkno = pp->p_offset + bp->b_blkno;
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maxsz = pp->p_size;
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if (sp->ds_bad != NULL && ds_debug) {
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daddr_t newblkno;
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newblkno = transbad144(sp->ds_bad, blkno);
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if (newblkno != blkno)
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printf("should map bad block %lu -> %lu\n",
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blkno, newblkno);
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}
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}
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/* overwriting disk label ? */
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/* XXX should also protect bootstrap in first 8K */
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if (blkno <= LABELSECTOR + labelsect &&
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#if LABELSECTOR != 0
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bp->b_blkno + sz > LABELSECTOR + labelsect &&
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#endif
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(bp->b_flags & B_READ) == 0 && sp->ds_wlabel == 0) {
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bp->b_error = EROFS;
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goto bad;
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}
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#if defined(DOSBBSECTOR) && defined(notyet)
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/* overwriting master boot record? */
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if (blkno <= DOSBBSECTOR && (bp->b_flags & B_READ) == 0 &&
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sp->ds_wlabel == 0) {
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bp->b_error = EROFS;
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goto bad;
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}
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#endif
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/* beyond partition? */
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if (bp->b_blkno < 0 || bp->b_blkno + sz > maxsz) {
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/* if exactly at end of disk, return an EOF */
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if (bp->b_blkno == maxsz) {
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bp->b_resid = bp->b_bcount;
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return (0);
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}
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/* or truncate if part of it fits */
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sz = maxsz - bp->b_blkno;
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if (sz <= 0) {
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bp->b_error = EINVAL;
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goto bad;
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}
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bp->b_bcount = sz << DEV_BSHIFT;
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}
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bp->b_pblkno = blkno + sp->ds_offset;
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/*
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* Snoop on label accesses if the slice offset is nonzero. Fudge
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* offsets in the label to keep the in-core label coherent with
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* the on-disk one.
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*/
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if (blkno <= LABELSECTOR + labelsect
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#if LABELSECTOR != 0
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&& bp->b_blkno + sz > LABELSECTOR + labelsect
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#endif
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&& sp->ds_offset != 0) {
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struct iodone_chain *ic;
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ic = malloc(sizeof *ic , M_DEVBUF, M_WAITOK);
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ic->ic_prev_flags = bp->b_flags;
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ic->ic_prev_iodone = bp->b_iodone;
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ic->ic_prev_iodone_chain = bp->b_iodone_chain;
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ic->ic_args[0].ia_long = (LABELSECTOR + labelsect - blkno)
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<< DEV_BSHIFT;
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if (lp)
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ic->ic_args[0].ia_long *= lp->d_secsize / DEV_BSIZE;
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ic->ic_args[1].ia_ptr = sp;
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bp->b_flags |= B_CALL;
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bp->b_iodone = dsiodone;
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bp->b_iodone_chain = ic;
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if (!(bp->b_flags & B_READ)) {
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/*
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* XXX even disklabel(8) writes directly so we need
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* to adjust writes. Perhaps we should drop support
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* for DIOCWLABEL (always write protect labels) and
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* require the use of DIOCWDINFO.
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*
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* XXX probably need to copy the data to avoid even
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* temporarily corrupting the in-core copy.
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*/
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if (bp->b_vp != NULL)
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bp->b_vp->v_numoutput++;
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msg = fixlabel((char *)NULL, sp,
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(struct disklabel *)
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(bp->b_data + ic->ic_args[0].ia_long),
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TRUE);
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if (msg != NULL) {
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printf("%s\n", msg);
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bp->b_error = EROFS;
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goto bad;
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}
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}
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}
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return (1);
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bad:
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bp->b_flags |= B_ERROR;
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return (-1);
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}
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void
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dsclose(dev, mode, ssp)
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dev_t dev;
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int mode;
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struct diskslices *ssp;
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{
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u_char mask;
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struct diskslice *sp;
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sp = &ssp->dss_slices[dkslice(dev)];
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mask = 1 << dkpart(dev);
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switch (mode) {
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case S_IFBLK:
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sp->ds_bopenmask &= ~mask;
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break;
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case S_IFCHR:
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sp->ds_copenmask &= ~mask;
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break;
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}
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sp->ds_openmask = sp->ds_bopenmask | sp->ds_copenmask;
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}
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void
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dsgone(sspp)
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struct diskslices **sspp;
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{
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int slice;
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struct diskslice *sp;
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struct diskslices *ssp;
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for (slice = 0, ssp = *sspp; slice < ssp->dss_nslices; slice++) {
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sp = &ssp->dss_slices[slice];
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if (sp->ds_bad != NULL) {
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free(sp->ds_bad, M_DEVBUF);
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set_ds_bad(ssp, slice, (struct dkbad_intern *)NULL);
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}
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#ifdef DEVFS
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if (sp->ds_bdev != NULL)
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devfs_remove_dev(sp->ds_bdev);
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if (sp->ds_cdev != NULL)
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devfs_remove_dev(sp->ds_cdev);
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#endif
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free_ds_label(ssp, slice);
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}
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free(ssp, M_DEVBUF);
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*sspp = NULL;
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}
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/*
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* For the "write" commands (DIOCSBAD, DIOCSDINFO and DIOCWDINFO), this
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* is subject to the same restriction as dsopen().
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*/
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int
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dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom)
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char *dname;
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dev_t dev;
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int cmd;
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caddr_t data;
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int flags;
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struct diskslices **sspp;
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d_strategy_t *strat;
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ds_setgeom_t *setgeom;
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{
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int error;
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struct disklabel *lp;
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int old_wlabel;
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u_char openmask;
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int part;
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int slice;
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struct diskslice *sp;
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struct diskslices *ssp;
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slice = dkslice(dev);
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ssp = *sspp;
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sp = &ssp->dss_slices[slice];
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lp = sp->ds_label;
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switch (cmd) {
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case DIOCGDINFO:
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if (lp == NULL)
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return (EINVAL);
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*(struct disklabel *)data = *lp;
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return (0);
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|
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#ifdef notyet
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case DIOCGDINFOP:
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if (lp == NULL)
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return (EINVAL);
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*(struct disklabel **)data = lp;
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return (0);
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#endif
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case DIOCGPART:
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if (lp == NULL)
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return (EINVAL);
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((struct partinfo *)data)->disklab = lp;
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((struct partinfo *)data)->part
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= &lp->d_partitions[dkpart(dev)];
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return (0);
|
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|
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case DIOCGSLICEINFO:
|
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*(struct diskslices *)data = *ssp;
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return (0);
|
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|
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case DIOCSBAD:
|
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if (slice == WHOLE_DISK_SLICE)
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return (ENODEV);
|
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if (!(flags & FWRITE))
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return (EBADF);
|
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if (lp == NULL)
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return (EINVAL);
|
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if (sp->ds_bad != NULL)
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free(sp->ds_bad, M_DEVBUF);
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set_ds_bad(ssp, slice, internbad144((struct dkbad *)data, lp));
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return (0);
|
|
|
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case DIOCSDINFO:
|
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if (slice == WHOLE_DISK_SLICE)
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return (ENODEV);
|
|
if (!(flags & FWRITE))
|
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return (EBADF);
|
|
lp = malloc(sizeof *lp, M_DEVBUF, M_WAITOK);
|
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if (sp->ds_label == NULL)
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bzero(lp, sizeof *lp);
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else
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bcopy(sp->ds_label, lp, sizeof *lp);
|
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error = setdisklabel(lp, (struct disklabel *)data,
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sp->ds_label != NULL
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? sp->ds_openmask : (u_long)0);
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/* XXX why doesn't setdisklabel() check this? */
|
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if (error == 0 && lp->d_partitions[RAW_PART].p_offset != 0)
|
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error = EINVAL;
|
|
if (error == 0) {
|
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if (lp->d_secperunit > sp->ds_size)
|
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error = ENOSPC;
|
|
for (part = 0; part < lp->d_npartitions; part++)
|
|
if (lp->d_partitions[part].p_size > sp->ds_size)
|
|
error = ENOSPC;
|
|
}
|
|
#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++) {
|
|
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;
|
|
{
|
|
struct dkbad *btp;
|
|
dev_t dev1;
|
|
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; slice < ssp->dss_nslices; slice++) {
|
|
sp = &ssp->dss_slices[slice];
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
unit = dkunit(dev);
|
|
|
|
/*
|
|
* Initialize secondary info for all slices. It is needed for more
|
|
* than the current slice in the DEVFS case.
|
|
*/
|
|
for (slice = 0; slice < ssp->dss_nslices; slice++) {
|
|
sp = &ssp->dss_slices[slice];
|
|
if (sp->ds_label != NULL)
|
|
continue;
|
|
dev1 = dkmodslice(dkmodpart(dev, RAW_PART), slice);
|
|
sname = dsname(dname, unit, slice, RAW_PART, partname);
|
|
#ifdef DEVFS
|
|
if (slice != COMPATIBILITY_SLICE && sp->ds_bdev == NULL
|
|
&& sp->ds_size != 0) {
|
|
mynor = minor(dev1);
|
|
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
|
|
/*
|
|
* XXX this should probably only be done for the need_init
|
|
* case, but there may be a problem with DIOCSYNCSLICEINFO.
|
|
*/
|
|
set_ds_wlabel(ssp, slice, TRUE); /* XXX invert */
|
|
lp1 = malloc(sizeof *lp1, M_DEVBUF, M_WAITOK);
|
|
*lp1 = *lp;
|
|
TRACE(("readdisklabel\n"));
|
|
msg = readdisklabel(dev1, strat, lp1);
|
|
#if 0 /* XXX */
|
|
if (msg == NULL && setgeom != NULL && setgeom(lp1) != 0)
|
|
msg = "setgeom failed";
|
|
#endif
|
|
if (msg == NULL)
|
|
msg = fixlabel(sname, sp, lp1, FALSE);
|
|
if (msg != NULL) {
|
|
free(lp1, M_DEVBUF);
|
|
if (sp->ds_type == DOSPTYP_386BSD /* XXX */)
|
|
log(LOG_WARNING, "%s: cannot find label (%s)\n",
|
|
sname, msg);
|
|
continue;
|
|
}
|
|
if (lp1->d_flags & D_BADSECT) {
|
|
btp = malloc(sizeof *btp, M_DEVBUF, M_WAITOK);
|
|
TRACE(("readbad144\n"));
|
|
msg = readbad144(dev1, strat, lp1, btp);
|
|
if (msg != NULL) {
|
|
log(LOG_WARNING,
|
|
"%s: cannot find bad sector table (%s)\n",
|
|
sname, msg);
|
|
free(btp, M_DEVBUF);
|
|
free(lp1, M_DEVBUF);
|
|
continue;
|
|
}
|
|
set_ds_bad(ssp, slice, internbad144(btp, lp1));
|
|
free(btp, M_DEVBUF);
|
|
if (sp->ds_bad == NULL) {
|
|
free(lp1, M_DEVBUF);
|
|
continue;
|
|
}
|
|
}
|
|
set_ds_label(ssp, slice, lp1);
|
|
#ifdef DEVFS
|
|
set_ds_labeldevs(dname, dev1, ssp);
|
|
#endif
|
|
set_ds_wlabel(ssp, slice, FALSE);
|
|
}
|
|
|
|
slice = dkslice(dev);
|
|
if (slice >= ssp->dss_nslices)
|
|
return (ENXIO);
|
|
sp = &ssp->dss_slices[slice];
|
|
part = dkpart(dev);
|
|
if (part != RAW_PART
|
|
&& (sp->ds_label == NULL || part >= sp->ds_label->d_npartitions))
|
|
return (EINVAL); /* XXX needs translation */
|
|
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);
|
|
if (ssp->dss_first_bsd_slice == COMPATIBILITY_SLICE)
|
|
return;
|
|
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;
|
|
}
|