1067 lines
27 KiB
C
1067 lines
27 KiB
C
/*-
|
|
* 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 1.31 1996/12/01 11:25:00 sos Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/conf.h>
|
|
#ifdef DEVFS
|
|
#include <sys/devfsext.h>
|
|
#endif
|
|
#include <sys/disklabel.h>
|
|
#include <sys/diskslice.h>
|
|
#include <sys/dkbad.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
|
|
#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;
|
|
}
|
|
|
|
bp->b_pblkno = blkno + sp->ds_offset;
|
|
|
|
/*
|
|
* 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;
|
|
if (lp)
|
|
ic->ic_args[0].ia_long *= lp->d_secsize / DEV_BSIZE;
|
|
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;
|
|
{
|
|
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;
|
|
}
|