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C++ dkcksum函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中dkcksum函数的典型用法代码示例。如果您正苦于以下问题：C++ dkcksum函数的具体用法？C++ dkcksum怎么用？C++ dkcksum使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了dkcksum函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: setdisklabel

/*
 * Check new disk label for sensibility
 * before setting it.
 */
int
setdisklabel(struct disklabel *olp, struct disklabel *nlp, u_long openmask,
    struct cpu_disklabel *osdep)
{
	int i;
	struct partition *opp, *npp;

	if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC ||
	    dkcksum(nlp) != 0)
		return EINVAL;
	while ((i = ffs(openmask)) != 0) {
		i--;
		openmask &= ~(1 << i);
		if (nlp->d_npartitions <= i)
			return EBUSY;
		opp = &olp->d_partitions[i];
		npp = &nlp->d_partitions[i];
		if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size)
			return EBUSY;
		/*
		 * Copy internally-set partition information
		 * if new label doesn't include it.		XXX
		 */
		if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) {
			npp->p_fstype = opp->p_fstype;
			npp->p_fsize = opp->p_fsize;
			npp->p_frag = opp->p_frag;
			npp->p_cpg = opp->p_cpg;
		}
	}
 	nlp->d_checksum = 0;
 	nlp->d_checksum = dkcksum(nlp);
	*olp = *nlp;
	return 0;
}
开发者ID:ryo，项目名称:netbsd-src，代码行数:39，代码来源:disksubr.c


示例2: setdisklabel

/*
 * Check new disk label for sensibility
 * before setting it.
 */
int
setdisklabel(struct disklabel *olp, struct disklabel *nlp, u_long openmask,
    struct cpu_disklabel *osdep)
{
	int i;
	struct partition *opp, *npp;

	/* sanity clause */
	if (nlp->d_secpercyl == 0 || nlp->d_secsize == 0
		|| (nlp->d_secsize % DEV_BSIZE) != 0)
			return(EINVAL);

	/* special case to allow disklabel to be invalidated */
	if (nlp->d_magic == 0xffffffff) {
		*olp = *nlp;
		return (0);
	}

	if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC ||
	    dkcksum(nlp) != 0)
		return (EINVAL);

	/* XXX missing check if other dos partitions will be overwritten */

	while (openmask != 0) {
		i = ffs(openmask) - 1;
		openmask &= ~(1 << i);
		if (nlp->d_npartitions <= i)
			return (EBUSY);
		opp = &olp->d_partitions[i];
		npp = &nlp->d_partitions[i];
		if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size)
			return (EBUSY);
		/*
		 * Copy internally-set partition information
		 * if new label doesn't include it.		XXX
		 */
		if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) {
			npp->p_fstype = opp->p_fstype;
			npp->p_fsize = opp->p_fsize;
			npp->p_frag = opp->p_frag;
			npp->p_cpg = opp->p_cpg;
		}
	}
 	nlp->d_checksum = 0;
 	nlp->d_checksum = dkcksum(nlp);
	*olp = *nlp;
	return (0);
}
开发者ID:MarginC，项目名称:kame，代码行数:53，代码来源:disksubr.c


示例3: vndgetdefaultlabel

static void
vndgetdefaultlabel(struct vnd_softc *sc, struct disklabel *lp)
{
	struct vndgeom *vng = &sc->sc_geom;
	struct partition *pp;

	memset(lp, 0, sizeof(*lp));

	lp->d_secperunit = sc->sc_size / (vng->vng_secsize / DEV_BSIZE);
	lp->d_secsize = vng->vng_secsize;
	lp->d_nsectors = vng->vng_nsectors;
	lp->d_ntracks = vng->vng_ntracks;
	lp->d_ncylinders = vng->vng_ncylinders;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;

	strncpy(lp->d_typename, "vnd", sizeof(lp->d_typename));
	lp->d_type = DTYPE_VND;
	strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
	lp->d_rpm = 3600;
	lp->d_interleave = 1;
	lp->d_flags = 0;

	pp = &lp->d_partitions[RAW_PART];
	pp->p_offset = 0;
	pp->p_size = lp->d_secperunit;
	pp->p_fstype = FS_UNUSED;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);
}
开发者ID:RyanLucchese，项目名称:rumpkernel-netbsd-src，代码行数:32，代码来源:vnd.c


示例4: fdgetdisklabel

int
fdgetdisklabel(dev_t dev, struct fd_softc *fd, struct disklabel *lp,
    int spoofonly)
{
	bzero(lp, sizeof(struct disklabel));

	lp->d_type = DTYPE_FLOPPY;
	lp->d_secsize = FD_BSIZE(fd);
	lp->d_secpercyl = fd->sc_type->seccyl;
	lp->d_nsectors = fd->sc_type->sectrac;
	lp->d_ncylinders = fd->sc_type->tracks;
	lp->d_ntracks = fd->sc_type->heads;	/* Go figure... */
	DL_SETDSIZE(lp, fd->sc_type->size);

	strncpy(lp->d_typename, "floppy disk", sizeof(lp->d_typename));
	strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
	lp->d_version = 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);

	/*
	 * Call the generic disklabel extraction routine.  If there's
	 * not a label there, fake it.
	 */
	return readdisklabel(DISKLABELDEV(dev), fdstrategy, lp, spoofonly);
}
开发者ID:toddfries，项目名称:OpenBSD-sys-patches，代码行数:28，代码来源:fd.c


示例5: maru_getdefaultlabel

/*
 * build standard adaptec ficticious geometry
 */
static void
maru_getdefaultlabel(struct maru_softc *sc, struct disklabel *lp)
{
    struct partition *pp;
    DB("maru_getdefaultlabel(%p, %p)\n", sc, lp);
    bzero(lp, sizeof *lp);
    lp->d_secsize = 512;
    lp->d_secperunit = sc->sc_size / lp->d_secsize;
    lp->d_nsectors = 32;
    lp->d_ntracks = 16;
    lp->d_ncylinders = sc->sc_size / (lp->d_nsectors * lp->d_secsize * lp->d_ntracks);
    lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
    strncpy(lp->d_typename, "maru", sizeof(lp->d_typename));
    lp->d_type = DTYPE_VND; /* XXX compat */
    strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
    lp->d_rpm = 3600;
    lp->d_interleave = 1;
    lp->d_flags = 0;
 
    pp = &lp->d_partitions[RAW_PART];
    pp->p_offset = 0;
    pp->p_size = lp->d_secperunit;
    pp->p_fstype = FS_UNUSED;

    lp->d_npartitions = RAW_PART + 1;
    lp->d_magic = DISKMAGIC;
    lp->d_magic2 = DISKMAGIC;
    lp->d_checksum = dkcksum(lp);
}
开发者ID:MerlijnWajer，项目名称:rubberhose，代码行数:32，代码来源:nbsd_maru.c


示例6: wdgetdefaultlabel

void
wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp)
{
	WDCDEBUG_PRINT(("wdgetdefaultlabel\n"), DEBUG_FUNCS);
	bzero(lp, sizeof(struct disklabel));

	lp->d_secsize = DEV_BSIZE;
	DL_SETDSIZE(lp, wd->sc_capacity);
	lp->d_ntracks = wd->sc_params.atap_heads;
	lp->d_nsectors = wd->sc_params.atap_sectors;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
	lp->d_ncylinders = DL_GETDSIZE(lp) / lp->d_secpercyl;
	if (wd->drvp->ata_vers == -1) {
		lp->d_type = DTYPE_ST506;
		strncpy(lp->d_typename, "ST506/MFM/RLL", sizeof lp->d_typename);
	} else {
		lp->d_type = DTYPE_ESDI;
		strncpy(lp->d_typename, "ESDI/IDE disk", sizeof lp->d_typename);
	}
	/* XXX - user viscopy() like sd.c */
	strncpy(lp->d_packname, wd->sc_params.atap_model, sizeof lp->d_packname);
	lp->d_flags = 0;
	lp->d_version = 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);
}
开发者ID:DavidAlphaFox，项目名称:openbsd-kernel，代码行数:28，代码来源:wd.c


示例7: dk_getdefaultlabel

/* ARGSUSED */
void
dk_getdefaultlabel(struct dk_softc *dksc, struct disklabel *lp)
{
	struct disk_geom *dg = &dksc->sc_dkdev.dk_geom;

	memset(lp, 0, sizeof(*lp));

	if (dg->dg_secperunit > UINT32_MAX)
		lp->d_secperunit = UINT32_MAX;
	else
		lp->d_secperunit = dg->dg_secperunit;
	lp->d_secsize = dg->dg_secsize;
	lp->d_nsectors = dg->dg_nsectors;
	lp->d_ntracks = dg->dg_ntracks;
	lp->d_ncylinders = dg->dg_ncylinders;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;

	strlcpy(lp->d_typename, dksc->sc_xname, sizeof(lp->d_typename));
	lp->d_type = dksc->sc_dtype;
	strlcpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
	lp->d_rpm = 3600;
	lp->d_interleave = 1;
	lp->d_flags = 0;

	lp->d_partitions[RAW_PART].p_offset = 0;
	lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
	lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(dksc->sc_dkdev.dk_label);
}
开发者ID:ycui1984，项目名称:netbsd-src，代码行数:34，代码来源:dksubr.c


示例8: presto_getdisklabel

/*
 * Read the disklabel. If none is present, use a fictitious one instead.
 */
void
presto_getdisklabel(struct presto_softc *sc)
{
	struct disklabel *lp = sc->sc_dk.dk_label;

	bzero(sc->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel));
	bzero(sc->sc_dk.dk_label, sizeof(struct disklabel));

	lp->d_secsize = DEV_BSIZE;
	lp->d_ntracks = 1;
	lp->d_nsectors = 32;
	lp->d_secperunit = (sc->sc_memsize - PSERVE_OFFSET) >> DEV_BSHIFT;
	lp->d_ncylinders = lp->d_secperunit / lp->d_nsectors;
	lp->d_secpercyl = lp->d_nsectors;

	strncpy(lp->d_typename, "Prestoserve", 16);
	lp->d_type = DTYPE_SCSI;	/* what better to put here? */
	strncpy(lp->d_packname, sc->sc_model, 16);
	lp->d_rpm = 3600;
	lp->d_interleave = 1;

	lp->d_partitions[RAW_PART].p_offset = 0;
	lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
	lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);

	readdisklabel(DISKLABELDEV(sc->sc_dev.dv_unit), prestostrategy,
	    sc->sc_dk.dk_label, sc->sc_dk.dk_cpulabel, 0);
}
开发者ID:avsm，项目名称:openbsd-xen-sys，代码行数:36，代码来源:presto.c


示例9: vndgetdisklabel

/*
 * Load the label information on the named device
 */
int
vndgetdisklabel(dev_t dev, struct vnd_softc *sc, struct disklabel *lp,
    int spoofonly)
{
	memset(lp, 0, sizeof(struct disklabel));

	lp->d_secsize = sc->sc_secsize;
	lp->d_nsectors = sc->sc_nsectors;
	lp->d_ntracks = sc->sc_ntracks;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
	lp->d_ncylinders = sc->sc_size / lp->d_secpercyl;

	strncpy(lp->d_typename, "vnd device", sizeof(lp->d_typename));
	lp->d_type = DTYPE_VND;
	strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
	DL_SETDSIZE(lp, sc->sc_size);
	lp->d_flags = 0;
	lp->d_version = 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);

	/* Call the generic disklabel extraction routine */
	return readdisklabel(DISKLABELDEV(dev), vndstrategy, lp, spoofonly);
}
开发者ID:orumin，项目名称:openbsd-efivars，代码行数:29，代码来源:vnd.c


示例10: ldgetdefaultlabel

/*
 * Construct a ficticious label.
 */
static void
ldgetdefaultlabel(struct ld_softc *sc, struct disklabel *lp)
{

	memset(lp, 0, sizeof(struct disklabel));

	lp->d_secsize = sc->sc_secsize;
	lp->d_ntracks = sc->sc_nheads;
	lp->d_nsectors = sc->sc_nsectors;
	lp->d_ncylinders = sc->sc_ncylinders;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
	lp->d_type = DTYPE_LD;
	strcpy(lp->d_typename, "unknown");
	strcpy(lp->d_packname, "fictitious");
	lp->d_secperunit = sc->sc_secperunit;
	lp->d_rpm = 7200;
	lp->d_interleave = 1;
	lp->d_flags = 0;

	lp->d_partitions[RAW_PART].p_offset = 0;
	lp->d_partitions[RAW_PART].p_size =
	    lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
	lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);
}
开发者ID:MarginC，项目名称:kame，代码行数:32，代码来源:ld.c


示例11: mcdgetdefaultlabel

void
mcdgetdefaultlabel(struct mcd_softc *sc, struct disklabel *lp)
{

	memset(lp, 0, sizeof(struct disklabel));

	lp->d_secsize = sc->blksize;
	lp->d_ntracks = 1;
	lp->d_nsectors = 100;
	lp->d_ncylinders = (sc->disksize / 100) + 1;
	lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;

	strncpy(lp->d_typename, "Mitsumi CD-ROM", 16);
	lp->d_type = 0;	/* XXX */
	strncpy(lp->d_packname, "fictitious", 16);
	lp->d_secperunit = sc->disksize;
	lp->d_rpm = 300;
	lp->d_interleave = 1;
	lp->d_flags = D_REMOVABLE;

	lp->d_partitions[0].p_offset = 0;
	lp->d_partitions[0].p_size =
	    lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
	lp->d_partitions[0].p_fstype = FS_ISO9660;
	lp->d_partitions[RAW_PART].p_offset = 0;
	lp->d_partitions[RAW_PART].p_size =
	    lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
	lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);
}
开发者ID:yazshel，项目名称:netbsd-kernel，代码行数:34，代码来源:mcd.c


示例12: ofdisk_getdefaultlabel

void
ofdisk_getdefaultlabel(struct ofdisk_softc *of, struct disklabel *lp)
{

	memset(lp, 0, sizeof *lp);

	/*
	 * XXX Firmware bug?  Asking for block size gives a
	 * XXX ridiculous number!  So we use what the boot program
	 * XXX uses.
	 */
	lp->d_secsize = DEV_BSIZE;

	lp->d_secperunit = OF_call_method_1("#blocks",
	    of->sc_ihandle, 0);
	if (lp->d_secperunit == (u_int32_t)-1)
		lp->d_secperunit = 0x7fffffff;

	lp->d_secpercyl = 1;
	lp->d_nsectors = 1;
	lp->d_ntracks = 1;
	lp->d_ncylinders = lp->d_secperunit;

	lp->d_partitions[RAW_PART].p_offset = 0;
	lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
	lp->d_npartitions = RAW_PART + 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);
}
开发者ID:ryoon，项目名称:netbsd-xhci，代码行数:31，代码来源:ofdisk.c


示例13: rdgetdisklabel

int
rdgetdisklabel(dev_t dev, struct rd_softc *sc, struct disklabel *lp,
    int spoofonly)
{
	bzero(lp, sizeof(struct disklabel));

	lp->d_secsize = DEV_BSIZE;
	lp->d_ntracks = 1;
	lp->d_nsectors = rd_root_size >> DEV_BSHIFT;
	lp->d_ncylinders = 1;
	lp->d_secpercyl = lp->d_nsectors;
	if (lp->d_secpercyl == 0) {
		lp->d_secpercyl = 100;
		/* as long as it's not 0 - readdisklabel divides by it */
	}

	strncpy(lp->d_typename, "RAM disk", sizeof(lp->d_typename));
	lp->d_type = DTYPE_SCSI;
	strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
	DL_SETDSIZE(lp, lp->d_nsectors);
	lp->d_version = 1;

	lp->d_magic = DISKMAGIC;
	lp->d_magic2 = DISKMAGIC;
	lp->d_checksum = dkcksum(lp);

	/* Call the generic disklabel extraction routine. */
	return (readdisklabel(DISKLABELDEV(dev), rdstrategy, lp, spoofonly));
}
开发者ID:sofuture，项目名称:bitrig，代码行数:29，代码来源:rd.c


示例14: dk_makedisklabel

/* ARGSUSED */
static void
dk_makedisklabel(struct dk_softc *dksc)
{
	struct	disklabel *lp = dksc->sc_dkdev.dk_label;

	lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS;
	strlcpy(lp->d_packname, "default label", sizeof(lp->d_packname));
	lp->d_checksum = dkcksum(lp);
}
开发者ID:ycui1984，项目名称:netbsd-src，代码行数:10，代码来源:dksubr.c


示例15: readdisklabel

/*
 * Attempt to read a disk label from a device
 * using the indicated strategy routine.
 * The label must be partly set up before this:
 * secpercyl and anything required in the strategy routine
 * (e.g., sector size) must be filled in before calling us.
 * Returns null on success and an error string on failure.
 */
const char *
readdisklabel(dev_t dev, void (*strat)(struct buf *bp), struct disklabel *lp,
    struct cpu_disklabel *osdep)
{
	struct buf *bp;
	struct disklabel *dlp;
	const char *msg = NULL;

	if (lp->d_secperunit == 0)
		lp->d_secperunit = 0x1fffffff;
	lp->d_npartitions = 1;
	if (lp->d_partitions[0].p_size == 0)
		lp->d_partitions[0].p_size = 0x1fffffff;
	lp->d_partitions[0].p_offset = 0;

	bp = geteblk((int)lp->d_secsize);
	bp->b_dev = dev;
	bp->b_blkno = LABELSECTOR;
	bp->b_bcount = lp->d_secsize;
	bp->b_flags |= B_READ;
	bp->b_cylinder = LABELSECTOR / lp->d_secpercyl;
	(*strat)(bp);
	if (biowait(bp)) {
		msg = "I/O error";
	} else for (dlp = (struct disklabel *)bp->b_data;
	    dlp <= (struct disklabel *)
	    ((char *)bp->b_data + DEV_BSIZE - sizeof(*dlp));
	    dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
		if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
			if (msg == NULL)
				msg = "no disk label";
		} else if (dlp->d_npartitions > MAXPARTITIONS ||
			   dkcksum(dlp) != 0)
			msg = "disk label corrupted";
		else {
			*lp = *dlp;
			msg = NULL;
			break;
		}
	}
	brelse(bp, 0);
	/*
	 * If no NetBSD label was found, check for an Ultrix label and
	 * construct tne incore label from the Ultrix partition information.
	 */
	if (msg != NULL) {
		msg = compat_label(dev, strat, lp, osdep);
		if (msg == NULL) {
			printf("WARNING: using Ultrix partition information\n");
			/* set geometry? */
		}
	}
/* XXX If no NetBSD label or Ultrix label found, generate default label here */
	return msg;
}
开发者ID:ryo，项目名称:netbsd-src，代码行数:63，代码来源:disksubr.c


示例16: readdisklabel

/*
 * Attempt to read a disk label from a device
 * using the indicated strategy routine.
 * The label must be partly set up before this:
 * secpercyl and anything required in the strategy routine
 * (e.g., sector size) must be filled in before calling us.
 * Returns null on success and an error string on failure.
 */
const char *
readdisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp,
    struct cpu_disklabel *osdep)
{
	struct buf *bp;
	struct disklabel *dlp;
	const char *msg = NULL;
	int i;

	if (lp->d_secsize == 0)
		lp->d_secsize = DEV_BSIZE;
	if (lp->d_secperunit == 0)
		lp->d_secperunit = 0x1fffffff;
	if (lp->d_npartitions < RAW_PART + 1)
		lp->d_npartitions = RAW_PART + 1;
	for (i = 0; i < RAW_PART; i++) {
		lp->d_partitions[i].p_size = 0;
		lp->d_partitions[i].p_offset = 0;
	}
	if (lp->d_partitions[RAW_PART].p_size == 0)
		lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
	lp->d_partitions[RAW_PART].p_offset = 0;

	lp->d_partitions[0].p_size = lp->d_partitions[RAW_PART].p_size;
	lp->d_partitions[0].p_fstype = FS_BSDFFS;

	bp = geteblk((int)lp->d_secsize);
	bp->b_dev = dev;
	bp->b_blkno = LABELSECTOR;
	bp->b_bcount = lp->d_secsize;
	bp->b_flags |= B_READ;
	bp->b_cylinder = LABELSECTOR / lp->d_secpercyl;
	(*strat)(bp);
	if (biowait(bp))
		msg = "I/O error";
	else for (dlp = (struct disklabel *)bp->b_data;
	    dlp <= (struct disklabel *)((char *)bp->b_data + DEV_BSIZE
	    - sizeof(*dlp));
	    dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
		if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
			if (msg == NULL)
				msg = "no disk label";
		} else if (dlp->d_npartitions > MAXPARTITIONS ||
			   dkcksum(dlp) != 0)
			msg = "disk label corrupted";
		else {
			*lp = *dlp;
			msg = NULL;
			break;
		}
	}
	brelse(bp, 0);
	return msg;
}
开发者ID:krytarowski，项目名称:netbsd-current-src-sys，代码行数:62，代码来源:disksubr.c


示例17: setdisklabel

/* Perform some checks and then copy a disk label */
scsi_ret_t
setdisklabel(
	struct disklabel *lp,
	struct disklabel *nlp)
{
	if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC ||
	    (dkcksum(nlp) != 0))
		return D_INVALID_OPERATION;
	*lp = *nlp;
	return D_SUCCESS;
}
开发者ID:rohsaini，项目名称:mkunity，代码行数:12，代码来源:rz_disk.c


示例18: targettohlabel

void
targettohlabel(struct disklabel *hlp, const struct disklabel *tlp)
{

	if (bswap32(tlp->d_magic) == DISKMAGIC)
		bswaplabel(hlp, tlp);
	else
		*hlp = *tlp;
	/* update checksum in host endian */
	hlp->d_checksum = 0;
	hlp->d_checksum = dkcksum(hlp);
}
开发者ID:ajinkya93，项目名称:netbsd-src，代码行数:12，代码来源:bswap.c


示例19: cputobsdlabel

int
cputobsdlabel(struct disklabel *lp, struct mvmedisklabel *clp)
{
	int i;

	if (clp->magic1 != DISKMAGIC || clp->magic2 != DISKMAGIC)
		return (EINVAL);	/* no disk label */

	lp->d_magic = clp->magic1;
	lp->d_type = clp->type;
	lp->d_subtype = clp->subtype;
	strncpy(lp->d_typename, clp->vid_vd, sizeof lp->d_typename);
	strncpy(lp->d_packname, clp->packname, sizeof lp->d_packname);
	lp->d_secsize = clp->cfg_psm;
	lp->d_nsectors = clp->cfg_spt;
	lp->d_ncylinders = clp->cfg_trk; /* trk is really num of cyl! */
	lp->d_ntracks = clp->cfg_hds;

	lp->d_secpercyl = clp->secpercyl;
	if (DL_GETDSIZE(lp) == 0)
		DL_SETDSIZE(lp, clp->secperunit);
	lp->d_acylinders = clp->acylinders;
	lp->d_flags = clp->flags;
	for (i = 0; i < NDDATA; i++)
		lp->d_drivedata[i] = clp->drivedata[i];
	for (i = 0; i < NSPARE; i++)
		lp->d_spare[i] = clp->spare[i];

	lp->d_magic2 = clp->magic2;
	lp->d_npartitions = clp->partitions;
	lp->d_bbsize = clp->bbsize;
	lp->d_sbsize = clp->sbsize;

	bcopy(clp->vid_4, &lp->d_partitions[0], sizeof(struct partition) * 4);
	bcopy(clp->cfg_4, &lp->d_partitions[4], sizeof(struct partition) * 12);

	if (clp->version < 2) {
		struct __partitionv0 *v0pp = (struct __partitionv0 *)lp->d_partitions;
		struct partition *pp = lp->d_partitions;

		for (i = 0; i < lp->d_npartitions; i++, pp++, v0pp++) {
			pp->p_fragblock = DISKLABELV1_FFS_FRAGBLOCK(v0pp->
			    p_fsize, v0pp->p_frag);
			pp->p_offseth = 0;
			pp->p_sizeh = 0;
		}
	}

	lp->d_version = 1;
	lp->d_checksum = 0;
	lp->d_checksum = dkcksum(lp);
	return (0);
}
开发者ID:alenichev，项目名称:openbsd-kernel，代码行数:53，代码来源:disksubr.c


示例20: rewritelabel

void
rewritelabel(char *s, int fd, struct disklabel *lp)
{
	if (unlabeled)
		return;

	lp->d_checksum = 0;
	lp->d_checksum = dkcksum(lp);
	if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) {
		warn("ioctl (WDINFO)");
		fatal("%s: can't rewrite disk label", s);
	}
}
开发者ID:darksoul42，项目名称:bitrig，代码行数:13，代码来源:newfs.c



注：本文中的dkcksum函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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