Home | History | Annotate | Line # | Download | only in dev
dksubr.c revision 1.58
      1  1.58  christos /* $NetBSD: dksubr.c,v 1.58 2014/12/31 19:52:05 christos Exp $ */
      2   1.1     elric 
      3   1.1     elric /*-
      4  1.34        ad  * Copyright (c) 1996, 1997, 1998, 1999, 2002, 2008 The NetBSD Foundation, Inc.
      5   1.1     elric  * All rights reserved.
      6   1.1     elric  *
      7   1.1     elric  * This code is derived from software contributed to The NetBSD Foundation
      8   1.1     elric  * by Jason R. Thorpe and Roland C. Dowdeswell.
      9   1.1     elric  *
     10   1.1     elric  * Redistribution and use in source and binary forms, with or without
     11   1.1     elric  * modification, are permitted provided that the following conditions
     12   1.1     elric  * are met:
     13   1.1     elric  * 1. Redistributions of source code must retain the above copyright
     14   1.1     elric  *    notice, this list of conditions and the following disclaimer.
     15   1.1     elric  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1     elric  *    notice, this list of conditions and the following disclaimer in the
     17   1.1     elric  *    documentation and/or other materials provided with the distribution.
     18   1.1     elric  *
     19   1.1     elric  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20   1.1     elric  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21   1.1     elric  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22   1.1     elric  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23   1.1     elric  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24   1.1     elric  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25   1.1     elric  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26   1.1     elric  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27   1.1     elric  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28   1.1     elric  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29   1.1     elric  * POSSIBILITY OF SUCH DAMAGE.
     30   1.1     elric  */
     31  1.10     lukem 
     32  1.10     lukem #include <sys/cdefs.h>
     33  1.58  christos __KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.58 2014/12/31 19:52:05 christos Exp $");
     34   1.1     elric 
     35   1.1     elric #include <sys/param.h>
     36   1.1     elric #include <sys/systm.h>
     37   1.1     elric #include <sys/stat.h>
     38   1.1     elric #include <sys/proc.h>
     39   1.1     elric #include <sys/ioctl.h>
     40   1.1     elric #include <sys/device.h>
     41   1.1     elric #include <sys/disk.h>
     42   1.1     elric #include <sys/disklabel.h>
     43  1.14      yamt #include <sys/buf.h>
     44  1.14      yamt #include <sys/bufq.h>
     45   1.1     elric #include <sys/vnode.h>
     46   1.1     elric #include <sys/fcntl.h>
     47   1.1     elric #include <sys/namei.h>
     48  1.49  pgoyette #include <sys/module.h>
     49   1.1     elric 
     50   1.1     elric #include <dev/dkvar.h>
     51  1.51   hannken #include <miscfs/specfs/specdev.h> /* for v_rdev */
     52   1.1     elric 
     53  1.44     elric int	dkdebug = 0;
     54   1.1     elric 
     55   1.1     elric #ifdef DEBUG
     56   1.1     elric #define DKDB_FOLLOW	0x1
     57   1.1     elric #define DKDB_INIT	0x2
     58   1.1     elric #define DKDB_VNODE	0x4
     59   1.1     elric 
     60   1.1     elric #define IFDEBUG(x,y)		if (dkdebug & (x)) y
     61   1.1     elric #define DPRINTF(x,y)		IFDEBUG(x, printf y)
     62   1.1     elric #define DPRINTF_FOLLOW(y)	DPRINTF(DKDB_FOLLOW, y)
     63   1.1     elric #else
     64   1.1     elric #define IFDEBUG(x,y)
     65   1.1     elric #define DPRINTF(x,y)
     66   1.1     elric #define DPRINTF_FOLLOW(y)
     67   1.1     elric #endif
     68   1.1     elric 
     69  1.49  pgoyette static int dk_subr_modcmd(modcmd_t, void *);
     70  1.49  pgoyette 
     71   1.1     elric #define DKLABELDEV(dev)	\
     72   1.1     elric 	(MAKEDISKDEV(major((dev)), DISKUNIT((dev)), RAW_PART))
     73   1.1     elric 
     74  1.13   thorpej static void	dk_makedisklabel(struct dk_intf *, struct dk_softc *);
     75   1.1     elric 
     76   1.1     elric void
     77  1.43     elric dk_sc_init(struct dk_softc *dksc, const char *xname)
     78   1.1     elric {
     79   1.1     elric 
     80   1.1     elric 	memset(dksc, 0x0, sizeof(*dksc));
     81   1.1     elric 	strncpy(dksc->sc_xname, xname, DK_XNAME_SIZE);
     82   1.1     elric 	dksc->sc_dkdev.dk_name = dksc->sc_xname;
     83   1.1     elric }
     84   1.1     elric 
     85   1.1     elric /* ARGSUSED */
     86   1.1     elric int
     87   1.1     elric dk_open(struct dk_intf *di, struct dk_softc *dksc, dev_t dev,
     88  1.27  christos     int flags, int fmt, struct lwp *l)
     89   1.1     elric {
     90   1.1     elric 	struct	disklabel *lp = dksc->sc_dkdev.dk_label;
     91   1.1     elric 	int	part = DISKPART(dev);
     92   1.1     elric 	int	pmask = 1 << part;
     93   1.1     elric 	int	ret = 0;
     94  1.16      yamt 	struct disk *dk = &dksc->sc_dkdev;
     95   1.1     elric 
     96  1.39    cegger 	DPRINTF_FOLLOW(("dk_open(%s, %p, 0x%"PRIx64", 0x%x)\n",
     97   1.1     elric 	    di->di_dkname, dksc, dev, flags));
     98   1.1     elric 
     99  1.30        ad 	mutex_enter(&dk->dk_openlock);
    100   1.1     elric 	part = DISKPART(dev);
    101  1.16      yamt 
    102  1.16      yamt 	/*
    103  1.16      yamt 	 * If there are wedges, and this is not RAW_PART, then we
    104  1.16      yamt 	 * need to fail.
    105  1.16      yamt 	 */
    106  1.16      yamt 	if (dk->dk_nwedges != 0 && part != RAW_PART) {
    107  1.16      yamt 		ret = EBUSY;
    108  1.16      yamt 		goto done;
    109  1.16      yamt 	}
    110  1.16      yamt 
    111   1.1     elric 	pmask = 1 << part;
    112   1.1     elric 
    113   1.1     elric 	/*
    114   1.1     elric 	 * If we're init'ed and there are no other open partitions then
    115   1.1     elric 	 * update the in-core disklabel.
    116   1.1     elric 	 */
    117  1.16      yamt 	if ((dksc->sc_flags & DKF_INITED)) {
    118  1.16      yamt 		if (dk->dk_openmask == 0) {
    119  1.16      yamt 			dk_getdisklabel(di, dksc, dev);
    120  1.16      yamt 		}
    121  1.16      yamt 		/* XXX re-discover wedges? */
    122  1.16      yamt 	}
    123   1.1     elric 
    124   1.1     elric 	/* Fail if we can't find the partition. */
    125   1.1     elric 	if ((part != RAW_PART) &&
    126   1.1     elric 	    (((dksc->sc_flags & DKF_INITED) == 0) ||
    127   1.1     elric 	    ((part >= lp->d_npartitions) ||
    128   1.1     elric 	    (lp->d_partitions[part].p_fstype == FS_UNUSED)))) {
    129   1.1     elric 		ret = ENXIO;
    130   1.1     elric 		goto done;
    131   1.1     elric 	}
    132   1.1     elric 
    133   1.1     elric 	/* Mark our unit as open. */
    134   1.1     elric 	switch (fmt) {
    135   1.1     elric 	case S_IFCHR:
    136  1.16      yamt 		dk->dk_copenmask |= pmask;
    137   1.1     elric 		break;
    138   1.1     elric 	case S_IFBLK:
    139  1.16      yamt 		dk->dk_bopenmask |= pmask;
    140   1.1     elric 		break;
    141   1.1     elric 	}
    142   1.1     elric 
    143  1.16      yamt 	dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask;
    144   1.1     elric 
    145   1.1     elric done:
    146  1.30        ad 	mutex_exit(&dk->dk_openlock);
    147   1.1     elric 	return ret;
    148   1.1     elric }
    149   1.1     elric 
    150   1.1     elric /* ARGSUSED */
    151   1.1     elric int
    152  1.27  christos dk_close(struct dk_intf *di, struct dk_softc *dksc, dev_t dev,
    153  1.27  christos     int flags, int fmt, struct lwp *l)
    154   1.1     elric {
    155   1.1     elric 	int	part = DISKPART(dev);
    156   1.1     elric 	int	pmask = 1 << part;
    157  1.16      yamt 	struct disk *dk = &dksc->sc_dkdev;
    158   1.1     elric 
    159  1.39    cegger 	DPRINTF_FOLLOW(("dk_close(%s, %p, 0x%"PRIx64", 0x%x)\n",
    160   1.1     elric 	    di->di_dkname, dksc, dev, flags));
    161   1.1     elric 
    162  1.30        ad 	mutex_enter(&dk->dk_openlock);
    163   1.1     elric 
    164   1.1     elric 	switch (fmt) {
    165   1.1     elric 	case S_IFCHR:
    166  1.16      yamt 		dk->dk_copenmask &= ~pmask;
    167   1.1     elric 		break;
    168   1.1     elric 	case S_IFBLK:
    169  1.16      yamt 		dk->dk_bopenmask &= ~pmask;
    170   1.1     elric 		break;
    171   1.1     elric 	}
    172  1.16      yamt 	dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask;
    173   1.1     elric 
    174  1.30        ad 	mutex_exit(&dk->dk_openlock);
    175   1.1     elric 	return 0;
    176   1.1     elric }
    177   1.1     elric 
    178   1.1     elric void
    179   1.1     elric dk_strategy(struct dk_intf *di, struct dk_softc *dksc, struct buf *bp)
    180   1.1     elric {
    181  1.55   mlelstv 	int	s, part;
    182   1.1     elric 	int	wlabel;
    183  1.18      yamt 	daddr_t	blkno;
    184  1.55   mlelstv 	struct disklabel *lp;
    185  1.55   mlelstv 	struct disk *dk;
    186  1.55   mlelstv 	uint64_t numsecs;
    187  1.55   mlelstv 	unsigned secsize;
    188   1.1     elric 
    189   1.1     elric 	DPRINTF_FOLLOW(("dk_strategy(%s, %p, %p)\n",
    190   1.1     elric 	    di->di_dkname, dksc, bp));
    191   1.1     elric 
    192   1.1     elric 	if (!(dksc->sc_flags & DKF_INITED)) {
    193  1.25       dan 		DPRINTF_FOLLOW(("dk_strategy: not inited\n"));
    194   1.1     elric 		bp->b_error  = ENXIO;
    195   1.2     elric 		biodone(bp);
    196   1.1     elric 		return;
    197   1.1     elric 	}
    198   1.1     elric 
    199  1.55   mlelstv 	lp = dksc->sc_dkdev.dk_label;
    200  1.55   mlelstv 	dk = &dksc->sc_dkdev;
    201  1.55   mlelstv 
    202  1.55   mlelstv 	part = DISKPART(bp->b_dev);
    203  1.55   mlelstv 	numsecs = dk->dk_geom.dg_secperunit;
    204  1.55   mlelstv 	secsize = dk->dk_geom.dg_secsize;
    205   1.1     elric 
    206   1.1     elric 	bp->b_resid = bp->b_bcount;
    207   1.1     elric 
    208  1.55   mlelstv 	/*
    209  1.55   mlelstv 	 * The transfer must be a whole number of blocks and the offset must
    210  1.55   mlelstv 	 * not be negative.
    211  1.55   mlelstv 	 */
    212  1.55   mlelstv 	if ((bp->b_bcount % secsize) != 0 || bp->b_blkno < 0) {
    213  1.55   mlelstv 		bp->b_error = EINVAL;
    214  1.55   mlelstv 		biodone(bp);
    215  1.55   mlelstv 		return;
    216  1.55   mlelstv 	}
    217  1.55   mlelstv 
    218   1.1     elric 	/* If there is nothing to do, then we are done */
    219   1.1     elric 	if (bp->b_bcount == 0) {
    220   1.1     elric 		biodone(bp);
    221   1.1     elric 		return;
    222   1.1     elric 	}
    223   1.1     elric 
    224   1.1     elric 	wlabel = dksc->sc_flags & (DKF_WLABEL|DKF_LABELLING);
    225  1.55   mlelstv 	if (part == RAW_PART) {
    226  1.55   mlelstv 		if (bounds_check_with_mediasize(bp, DEV_BSIZE, numsecs) <= 0) {
    227  1.55   mlelstv 			biodone(bp);
    228  1.55   mlelstv 			return;
    229  1.55   mlelstv 		}
    230  1.55   mlelstv 	} else {
    231  1.55   mlelstv 		if (bounds_check_with_label(&dksc->sc_dkdev, bp, wlabel) <= 0) {
    232  1.55   mlelstv 			biodone(bp);
    233  1.55   mlelstv 			return;
    234  1.55   mlelstv 		}
    235   1.1     elric 	}
    236   1.1     elric 
    237  1.18      yamt 	blkno = bp->b_blkno;
    238  1.55   mlelstv 	if (part != RAW_PART)
    239  1.55   mlelstv 		blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset;
    240  1.18      yamt 	bp->b_rawblkno = blkno;
    241  1.18      yamt 
    242   1.1     elric 	/*
    243   1.1     elric 	 * Start the unit by calling the start routine
    244   1.1     elric 	 * provided by the individual driver.
    245   1.1     elric 	 */
    246   1.1     elric 	s = splbio();
    247  1.40      yamt 	bufq_put(dksc->sc_bufq, bp);
    248  1.50    bouyer 	di->di_diskstart(dksc);
    249   1.1     elric 	splx(s);
    250   1.1     elric 	return;
    251   1.1     elric }
    252   1.1     elric 
    253   1.1     elric int
    254   1.1     elric dk_size(struct dk_intf *di, struct dk_softc *dksc, dev_t dev)
    255   1.1     elric {
    256   1.1     elric 	struct	disklabel *lp;
    257   1.1     elric 	int	is_open;
    258   1.1     elric 	int	part;
    259   1.1     elric 	int	size;
    260   1.1     elric 
    261   1.1     elric 	if ((dksc->sc_flags & DKF_INITED) == 0)
    262   1.1     elric 		return -1;
    263   1.1     elric 
    264   1.1     elric 	part = DISKPART(dev);
    265   1.1     elric 	is_open = dksc->sc_dkdev.dk_openmask & (1 << part);
    266   1.1     elric 
    267  1.19  christos 	if (!is_open && di->di_open(dev, 0, S_IFBLK, curlwp))
    268   1.1     elric 		return -1;
    269   1.1     elric 
    270   1.1     elric 	lp = dksc->sc_dkdev.dk_label;
    271   1.1     elric 	if (lp->d_partitions[part].p_fstype != FS_SWAP)
    272   1.1     elric 		size = -1;
    273   1.1     elric 	else
    274   1.1     elric 		size = lp->d_partitions[part].p_size *
    275   1.1     elric 		    (lp->d_secsize / DEV_BSIZE);
    276   1.1     elric 
    277  1.19  christos 	if (!is_open && di->di_close(dev, 0, S_IFBLK, curlwp))
    278   1.1     elric 		return 1;
    279   1.1     elric 
    280   1.1     elric 	return size;
    281   1.1     elric }
    282   1.1     elric 
    283   1.1     elric int
    284   1.1     elric dk_ioctl(struct dk_intf *di, struct dk_softc *dksc, dev_t dev,
    285  1.28  christos 	    u_long cmd, void *data, int flag, struct lwp *l)
    286   1.1     elric {
    287   1.1     elric 	struct	disklabel *lp;
    288  1.57  christos 	struct	disk *dk = &dksc->sc_dkdev;
    289   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    290   1.1     elric 	struct	disklabel newlabel;
    291   1.1     elric #endif
    292  1.57  christos 	int	error;
    293   1.1     elric 
    294  1.39    cegger 	DPRINTF_FOLLOW(("dk_ioctl(%s, %p, 0x%"PRIx64", 0x%lx)\n",
    295   1.1     elric 	    di->di_dkname, dksc, dev, cmd));
    296   1.1     elric 
    297   1.1     elric 	/* ensure that the pseudo disk is open for writes for these commands */
    298   1.1     elric 	switch (cmd) {
    299   1.1     elric 	case DIOCSDINFO:
    300   1.1     elric 	case DIOCWDINFO:
    301   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    302   1.1     elric 	case ODIOCSDINFO:
    303   1.1     elric 	case ODIOCWDINFO:
    304   1.1     elric #endif
    305   1.1     elric 	case DIOCWLABEL:
    306  1.43     elric 	case DIOCAWEDGE:
    307  1.43     elric 	case DIOCDWEDGE:
    308   1.1     elric 		if ((flag & FWRITE) == 0)
    309   1.1     elric 			return EBADF;
    310   1.1     elric 	}
    311   1.1     elric 
    312   1.1     elric 	/* ensure that the pseudo-disk is initialized for these */
    313   1.1     elric 	switch (cmd) {
    314   1.1     elric 	case DIOCGDINFO:
    315   1.1     elric 	case DIOCSDINFO:
    316   1.1     elric 	case DIOCWDINFO:
    317   1.1     elric 	case DIOCGPART:
    318   1.1     elric 	case DIOCWLABEL:
    319   1.1     elric 	case DIOCGDEFLABEL:
    320  1.43     elric 	case DIOCAWEDGE:
    321  1.43     elric 	case DIOCDWEDGE:
    322  1.43     elric 	case DIOCLWEDGES:
    323  1.54   mlelstv 	case DIOCMWEDGES:
    324  1.43     elric 	case DIOCCACHESYNC:
    325   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    326   1.1     elric 	case ODIOCGDINFO:
    327   1.1     elric 	case ODIOCSDINFO:
    328   1.1     elric 	case ODIOCWDINFO:
    329   1.1     elric 	case ODIOCGDEFLABEL:
    330   1.1     elric #endif
    331   1.1     elric 		if ((dksc->sc_flags & DKF_INITED) == 0)
    332   1.1     elric 			return ENXIO;
    333   1.1     elric 	}
    334   1.1     elric 
    335  1.58  christos 	error = disk_ioctl(dk, dev, cmd, data, flag, l);
    336  1.57  christos 	if (error != EPASSTHROUGH)
    337  1.57  christos 		return error;
    338  1.57  christos 	else
    339  1.57  christos 		error = 0;
    340  1.57  christos 
    341   1.1     elric 	switch (cmd) {
    342   1.1     elric 	case DIOCWDINFO:
    343   1.1     elric 	case DIOCSDINFO:
    344   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    345   1.1     elric 	case ODIOCWDINFO:
    346   1.1     elric 	case ODIOCSDINFO:
    347   1.1     elric #endif
    348   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    349   1.1     elric 		if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) {
    350   1.1     elric 			memset(&newlabel, 0, sizeof newlabel);
    351   1.1     elric 			memcpy(&newlabel, data, sizeof (struct olddisklabel));
    352   1.1     elric 			lp = &newlabel;
    353   1.1     elric 		} else
    354   1.1     elric #endif
    355   1.1     elric 		lp = (struct disklabel *)data;
    356   1.1     elric 
    357  1.30        ad 		mutex_enter(&dk->dk_openlock);
    358   1.1     elric 		dksc->sc_flags |= DKF_LABELLING;
    359   1.1     elric 
    360   1.1     elric 		error = setdisklabel(dksc->sc_dkdev.dk_label,
    361   1.1     elric 		    lp, 0, dksc->sc_dkdev.dk_cpulabel);
    362   1.1     elric 		if (error == 0) {
    363   1.1     elric 			if (cmd == DIOCWDINFO
    364   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    365   1.1     elric 			    || cmd == ODIOCWDINFO
    366   1.1     elric #endif
    367   1.1     elric 			   )
    368   1.1     elric 				error = writedisklabel(DKLABELDEV(dev),
    369   1.1     elric 				    di->di_strategy, dksc->sc_dkdev.dk_label,
    370   1.1     elric 				    dksc->sc_dkdev.dk_cpulabel);
    371   1.1     elric 		}
    372   1.1     elric 
    373   1.1     elric 		dksc->sc_flags &= ~DKF_LABELLING;
    374  1.30        ad 		mutex_exit(&dk->dk_openlock);
    375   1.1     elric 		break;
    376   1.1     elric 
    377   1.1     elric 	case DIOCWLABEL:
    378   1.1     elric 		if (*(int *)data != 0)
    379   1.1     elric 			dksc->sc_flags |= DKF_WLABEL;
    380   1.1     elric 		else
    381   1.1     elric 			dksc->sc_flags &= ~DKF_WLABEL;
    382   1.1     elric 		break;
    383   1.1     elric 
    384   1.1     elric 	case DIOCGDEFLABEL:
    385   1.1     elric 		dk_getdefaultlabel(di, dksc, (struct disklabel *)data);
    386   1.1     elric 		break;
    387   1.1     elric 
    388   1.1     elric #ifdef __HAVE_OLD_DISKLABEL
    389   1.1     elric 	case ODIOCGDEFLABEL:
    390   1.1     elric 		dk_getdefaultlabel(di, dksc, &newlabel);
    391   1.1     elric 		if (newlabel.d_npartitions > OLDMAXPARTITIONS)
    392   1.1     elric 			return ENOTTY;
    393   1.1     elric 		memcpy(data, &newlabel, sizeof (struct olddisklabel));
    394   1.1     elric 		break;
    395   1.1     elric #endif
    396   1.1     elric 
    397  1.21      yamt 	case DIOCGSTRATEGY:
    398  1.21      yamt 	    {
    399  1.21      yamt 		struct disk_strategy *dks = (void *)data;
    400  1.21      yamt 		int s;
    401  1.21      yamt 
    402  1.21      yamt 		s = splbio();
    403  1.21      yamt 		strlcpy(dks->dks_name, bufq_getstrategyname(dksc->sc_bufq),
    404  1.21      yamt 		    sizeof(dks->dks_name));
    405  1.21      yamt 		splx(s);
    406  1.21      yamt 		dks->dks_paramlen = 0;
    407  1.21      yamt 
    408  1.21      yamt 		return 0;
    409  1.21      yamt 	    }
    410  1.21      yamt 
    411  1.21      yamt 	case DIOCSSTRATEGY:
    412  1.21      yamt 	    {
    413  1.21      yamt 		struct disk_strategy *dks = (void *)data;
    414  1.21      yamt 		struct bufq_state *new;
    415  1.21      yamt 		struct bufq_state *old;
    416  1.21      yamt 		int s;
    417  1.21      yamt 
    418  1.21      yamt 		if ((flag & FWRITE) == 0) {
    419  1.21      yamt 			return EBADF;
    420  1.21      yamt 		}
    421  1.21      yamt 		if (dks->dks_param != NULL) {
    422  1.21      yamt 			return EINVAL;
    423  1.21      yamt 		}
    424  1.21      yamt 		dks->dks_name[sizeof(dks->dks_name) - 1] = 0; /* ensure term */
    425  1.21      yamt 		error = bufq_alloc(&new, dks->dks_name,
    426  1.21      yamt 		    BUFQ_EXACT|BUFQ_SORT_RAWBLOCK);
    427  1.21      yamt 		if (error) {
    428  1.21      yamt 			return error;
    429  1.21      yamt 		}
    430  1.21      yamt 		s = splbio();
    431  1.21      yamt 		old = dksc->sc_bufq;
    432  1.21      yamt 		bufq_move(new, old);
    433  1.21      yamt 		dksc->sc_bufq = new;
    434  1.21      yamt 		splx(s);
    435  1.21      yamt 		bufq_free(old);
    436  1.21      yamt 
    437  1.21      yamt 		return 0;
    438  1.21      yamt 	    }
    439  1.21      yamt 
    440   1.1     elric 	default:
    441   1.1     elric 		error = ENOTTY;
    442   1.1     elric 	}
    443   1.1     elric 
    444   1.1     elric 	return error;
    445   1.1     elric }
    446   1.1     elric 
    447   1.1     elric /*
    448   1.1     elric  * dk_dump dumps all of physical memory into the partition specified.
    449   1.1     elric  * This requires substantially more framework than {s,w}ddump, and hence
    450   1.1     elric  * is probably much more fragile.
    451   1.1     elric  *
    452   1.1     elric  * XXX: we currently do not implement this.
    453   1.1     elric  */
    454   1.1     elric 
    455   1.1     elric #define DKF_READYFORDUMP	(DKF_INITED|DKF_TAKEDUMP)
    456   1.1     elric #define DKFF_READYFORDUMP(x)	(((x) & DKF_READYFORDUMP) == DKF_READYFORDUMP)
    457   1.1     elric static volatile int	dk_dumping = 0;
    458   1.1     elric 
    459   1.1     elric /* ARGSUSED */
    460   1.1     elric int
    461  1.27  christos dk_dump(struct dk_intf *di, struct dk_softc *dksc, dev_t dev,
    462  1.28  christos     daddr_t blkno, void *va, size_t size)
    463   1.1     elric {
    464   1.1     elric 
    465   1.1     elric 	/*
    466   1.1     elric 	 * ensure that we consider this device to be safe for dumping,
    467   1.1     elric 	 * and that the device is configured.
    468   1.1     elric 	 */
    469   1.1     elric 	if (!DKFF_READYFORDUMP(dksc->sc_flags))
    470   1.1     elric 		return ENXIO;
    471   1.1     elric 
    472   1.1     elric 	/* ensure that we are not already dumping */
    473   1.1     elric 	if (dk_dumping)
    474   1.1     elric 		return EFAULT;
    475   1.1     elric 	dk_dumping = 1;
    476   1.1     elric 
    477   1.1     elric 	/* XXX: unimplemented */
    478   1.1     elric 
    479   1.1     elric 	dk_dumping = 0;
    480   1.1     elric 
    481   1.1     elric 	/* XXX: actually for now, we are going to leave this alone */
    482   1.1     elric 	return ENXIO;
    483   1.1     elric }
    484   1.1     elric 
    485   1.1     elric /* ARGSUSED */
    486   1.1     elric void
    487   1.1     elric dk_getdefaultlabel(struct dk_intf *di, struct dk_softc *dksc,
    488   1.1     elric 		      struct disklabel *lp)
    489   1.1     elric {
    490  1.47  christos 	struct disk_geom *dg = &dksc->sc_dkdev.dk_geom;
    491   1.4     elric 
    492   1.4     elric 	memset(lp, 0, sizeof(*lp));
    493   1.1     elric 
    494  1.52   mlelstv 	if (dg->dg_secperunit > UINT32_MAX)
    495  1.52   mlelstv 		lp->d_secperunit = UINT32_MAX;
    496  1.52   mlelstv 	else
    497  1.52   mlelstv 		lp->d_secperunit = dg->dg_secperunit;
    498  1.47  christos 	lp->d_secsize = dg->dg_secsize;
    499  1.47  christos 	lp->d_nsectors = dg->dg_nsectors;
    500  1.47  christos 	lp->d_ntracks = dg->dg_ntracks;
    501  1.47  christos 	lp->d_ncylinders = dg->dg_ncylinders;
    502   1.1     elric 	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
    503   1.1     elric 
    504   1.1     elric 	strncpy(lp->d_typename, di->di_dkname, sizeof(lp->d_typename));
    505   1.1     elric 	lp->d_type = di->di_dtype;
    506   1.1     elric 	strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
    507   1.1     elric 	lp->d_rpm = 3600;
    508   1.1     elric 	lp->d_interleave = 1;
    509   1.1     elric 	lp->d_flags = 0;
    510   1.1     elric 
    511   1.1     elric 	lp->d_partitions[RAW_PART].p_offset = 0;
    512  1.52   mlelstv 	lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
    513   1.1     elric 	lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
    514   1.1     elric 	lp->d_npartitions = RAW_PART + 1;
    515   1.1     elric 
    516   1.1     elric 	lp->d_magic = DISKMAGIC;
    517   1.1     elric 	lp->d_magic2 = DISKMAGIC;
    518   1.1     elric 	lp->d_checksum = dkcksum(dksc->sc_dkdev.dk_label);
    519   1.1     elric }
    520   1.1     elric 
    521   1.1     elric /* ARGSUSED */
    522   1.1     elric void
    523   1.1     elric dk_getdisklabel(struct dk_intf *di, struct dk_softc *dksc, dev_t dev)
    524   1.1     elric {
    525   1.1     elric 	struct	 disklabel *lp = dksc->sc_dkdev.dk_label;
    526   1.1     elric 	struct	 cpu_disklabel *clp = dksc->sc_dkdev.dk_cpulabel;
    527  1.48  christos 	struct disk_geom *dg = &dksc->sc_dkdev.dk_geom;
    528   1.1     elric 	struct	 partition *pp;
    529   1.1     elric 	int	 i;
    530   1.5       dsl 	const char	*errstring;
    531   1.1     elric 
    532   1.1     elric 	memset(clp, 0x0, sizeof(*clp));
    533   1.1     elric 	dk_getdefaultlabel(di, dksc, lp);
    534   1.1     elric 	errstring = readdisklabel(DKLABELDEV(dev), di->di_strategy,
    535   1.1     elric 	    dksc->sc_dkdev.dk_label, dksc->sc_dkdev.dk_cpulabel);
    536   1.1     elric 	if (errstring) {
    537   1.1     elric 		dk_makedisklabel(di, dksc);
    538   1.1     elric 		if (dksc->sc_flags & DKF_WARNLABEL)
    539   1.1     elric 			printf("%s: %s\n", dksc->sc_xname, errstring);
    540   1.1     elric 		return;
    541   1.1     elric 	}
    542   1.1     elric 
    543   1.1     elric 	if ((dksc->sc_flags & DKF_LABELSANITY) == 0)
    544   1.1     elric 		return;
    545   1.1     elric 
    546   1.1     elric 	/* Sanity check */
    547  1.53   mlelstv 	if (lp->d_secperunit < UINT32_MAX ?
    548  1.53   mlelstv 		lp->d_secperunit != dg->dg_secperunit :
    549  1.53   mlelstv 		lp->d_secperunit > dg->dg_secperunit)
    550  1.53   mlelstv 		printf("WARNING: %s: total sector size in disklabel (%ju) "
    551  1.53   mlelstv 		    "!= the size of %s (%ju)\n", dksc->sc_xname,
    552  1.53   mlelstv 		    (uintmax_t)lp->d_secperunit, di->di_dkname,
    553  1.53   mlelstv 		    (uintmax_t)dg->dg_secperunit);
    554   1.1     elric 
    555   1.1     elric 	for (i=0; i < lp->d_npartitions; i++) {
    556   1.1     elric 		pp = &lp->d_partitions[i];
    557  1.48  christos 		if (pp->p_offset + pp->p_size > dg->dg_secperunit)
    558   1.1     elric 			printf("WARNING: %s: end of partition `%c' exceeds "
    559  1.53   mlelstv 			    "the size of %s (%ju)\n", dksc->sc_xname,
    560  1.53   mlelstv 			    'a' + i, di->di_dkname,
    561  1.53   mlelstv 			    (uintmax_t)dg->dg_secperunit);
    562   1.1     elric 	}
    563   1.1     elric }
    564   1.1     elric 
    565   1.1     elric /* ARGSUSED */
    566  1.13   thorpej static void
    567  1.27  christos dk_makedisklabel(struct dk_intf *di, struct dk_softc *dksc)
    568   1.1     elric {
    569   1.1     elric 	struct	disklabel *lp = dksc->sc_dkdev.dk_label;
    570   1.1     elric 
    571   1.1     elric 	lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS;
    572   1.1     elric 	strncpy(lp->d_packname, "default label", sizeof(lp->d_packname));
    573   1.1     elric 	lp->d_checksum = dkcksum(lp);
    574   1.1     elric }
    575   1.1     elric 
    576   1.1     elric /* This function is taken from ccd.c:1.76  --rcd */
    577   1.1     elric 
    578   1.1     elric /*
    579   1.1     elric  * XXX this function looks too generic for dksubr.c, shouldn't we
    580   1.1     elric  *     put it somewhere better?
    581   1.1     elric  */
    582   1.1     elric 
    583   1.1     elric /*
    584   1.1     elric  * Lookup the provided name in the filesystem.  If the file exists,
    585   1.1     elric  * is a valid block device, and isn't being used by anyone else,
    586   1.1     elric  * set *vpp to the file's vnode.
    587   1.1     elric  */
    588   1.1     elric int
    589  1.42  dholland dk_lookup(struct pathbuf *pb, struct lwp *l, struct vnode **vpp)
    590   1.1     elric {
    591   1.1     elric 	struct nameidata nd;
    592   1.1     elric 	struct vnode *vp;
    593  1.24  christos 	int     error;
    594   1.1     elric 
    595  1.24  christos 	if (l == NULL)
    596  1.24  christos 		return ESRCH;	/* Is ESRCH the best choice? */
    597  1.24  christos 
    598  1.42  dholland 	NDINIT(&nd, LOOKUP, FOLLOW, pb);
    599  1.24  christos 	if ((error = vn_open(&nd, FREAD | FWRITE, 0)) != 0) {
    600   1.1     elric 		DPRINTF((DKDB_FOLLOW|DKDB_INIT),
    601   1.1     elric 		    ("dk_lookup: vn_open error = %d\n", error));
    602  1.24  christos 		return error;
    603   1.1     elric 	}
    604  1.24  christos 
    605   1.1     elric 	vp = nd.ni_vp;
    606  1.51   hannken 	if (vp->v_type != VBLK) {
    607  1.51   hannken 		error = ENOTBLK;
    608  1.24  christos 		goto out;
    609   1.1     elric 	}
    610   1.1     elric 
    611  1.51   hannken 	/* Reopen as anonymous vnode to protect against forced unmount. */
    612  1.51   hannken 	if ((error = bdevvp(vp->v_rdev, vpp)) != 0)
    613  1.24  christos 		goto out;
    614  1.51   hannken 	VOP_UNLOCK(vp);
    615  1.51   hannken 	if ((error = vn_close(vp, FREAD | FWRITE, l->l_cred)) != 0) {
    616  1.51   hannken 		vrele(*vpp);
    617  1.51   hannken 		return error;
    618  1.51   hannken 	}
    619  1.51   hannken 	if ((error = VOP_OPEN(*vpp, FREAD | FWRITE, l->l_cred)) != 0) {
    620  1.51   hannken 		vrele(*vpp);
    621  1.51   hannken 		return error;
    622  1.24  christos 	}
    623  1.51   hannken 	mutex_enter((*vpp)->v_interlock);
    624  1.51   hannken 	(*vpp)->v_writecount++;
    625  1.51   hannken 	mutex_exit((*vpp)->v_interlock);
    626  1.24  christos 
    627  1.51   hannken 	IFDEBUG(DKDB_VNODE, vprint("dk_lookup: vnode info", *vpp));
    628   1.1     elric 
    629  1.24  christos 	return 0;
    630  1.24  christos out:
    631  1.41   hannken 	VOP_UNLOCK(vp);
    632  1.35        ad 	(void) vn_close(vp, FREAD | FWRITE, l->l_cred);
    633  1.24  christos 	return error;
    634   1.1     elric }
    635  1.49  pgoyette 
    636  1.49  pgoyette MODULE(MODULE_CLASS_MISC, dk_subr, NULL);
    637  1.49  pgoyette 
    638  1.49  pgoyette static int
    639  1.49  pgoyette dk_subr_modcmd(modcmd_t cmd, void *arg)
    640  1.49  pgoyette {
    641  1.49  pgoyette 	switch (cmd) {
    642  1.49  pgoyette 	case MODULE_CMD_INIT:
    643  1.49  pgoyette 	case MODULE_CMD_FINI:
    644  1.49  pgoyette 		return 0;
    645  1.49  pgoyette 	case MODULE_CMD_STAT:
    646  1.49  pgoyette 	case MODULE_CMD_AUTOUNLOAD:
    647  1.49  pgoyette 	default:
    648  1.49  pgoyette 		return ENOTTY;
    649  1.49  pgoyette 	}
    650  1.49  pgoyette }
    651