C++ (Cpp) OF_seek示例

示例#1

文件： ofdev.c 项目： bradla/OpenBSD-Hammer2

static int
strategy(void *devdata, int rw, daddr32_t blk, size_t size, void *buf,
    size_t *rsize)
{
	struct of_dev *dev = devdata;
	u_quad_t pos;
	int n;

	if (rw != F_READ)
		return EPERM;
	if (dev->type != OFDEV_DISK)
		panic("strategy");

	pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;

	for (;;) {
		if (OF_seek(dev->handle, pos) < 0)
			break;
		n = OF_read(dev->handle, buf, size);
		if (n == -2)
			continue;
		if (n < 0)
			break;
		*rsize = n;
		return 0;
	}
	return EIO;
}

示例#2

文件： ofdev.c 项目： alenichev/openbsd-kernel

static int
strategy(void *devdata, int rw, daddr32_t blk, size_t size, void *buf,
    size_t *rsize)
{
	struct of_dev *dev = devdata;
	u_quad_t pos;
	int n;
	
	if (rw != F_READ)
		return EPERM;
	if (dev->type != OFDEV_DISK)
		panic("strategy");
	
	DNPRINTF(BOOT_D_OFDEV, "strategy: block %lx, partition offset %lx, "
	    "blksz %lx\n", (long)blk, (long)dev->partoff, (long)dev->bsize);
	DNPRINTF(BOOT_D_OFDEV, "strategy: seek position should be: %lx\n", 
	    (long)((blk + dev->partoff) * dev->bsize));
	pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
	
	for (;;) {
		DNPRINTF(BOOT_D_OFDEV, "strategy: seeking to %lx\n", (long)pos);
		if (OF_seek(dev->handle, pos) < 0)
			break;
		DNPRINTF(BOOT_D_OFDEV, "strategy: reading %lx at %p\n",
		    (long)size, buf);
		n = OF_read(dev->handle, buf, size);
		if (n == -2)
			continue;
		if (n < 0)
			break;
		*rsize = n;
		return 0;
	}
	return EIO;
}

示例#3

文件： ofw_disk.c 项目： 2trill2spill/freebsd

static int
ofwd_strategy(void *devdata, int flag __unused, daddr_t dblk, size_t size,
    char *buf, size_t *rsize)
{
	struct ofw_devdesc *dp = (struct ofw_devdesc *)devdata;
	daddr_t pos;
	int n;

	if (dp != kdp) {
		if (kdp != NULL) {
#if !defined(__powerpc__)
			OF_close(kdp->d_handle);
#endif
			kdp = NULL;
		}
		if ((dp->d_handle = OF_open(dp->d_path)) == -1)
			return (ENOENT);
		kdp = dp;
	}

	pos = dblk * 512;
	do {
		if (OF_seek(dp->d_handle, pos) < 0)
			return (EIO);
		n = OF_read(dp->d_handle, buf, size);
		if (n < 0 && n != -2)
			return (EIO);
	} while (n == -2);
	*rsize = size;
	return (0);
}

示例#4

文件： ofdisk.c 项目： ryoon/netbsd-xhci

int
ofdisk_close(dev_t dev, int flags, int fmt, struct lwp *l)
{
	struct ofdisk_softc *of =
		device_lookup_private(&ofdisk_cd, DISKUNIT(dev));

	mutex_enter(&of->sc_dk.dk_openlock);

	switch (fmt) {
	case S_IFCHR:
		of->sc_dk.dk_copenmask &= ~(1 << DISKPART(dev));
		break;
	case S_IFBLK:
		of->sc_dk.dk_bopenmask &= ~(1 << DISKPART(dev));
		break;
	}
	of->sc_dk.dk_openmask = of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;

#ifdef	FIRMWORKSBUGS
	/*
	 * This is a hack to get the firmware to flush its buffers.
	 */
	OF_seek(of->sc_ihandle, 0);
#endif
	if (!of->sc_dk.dk_openmask) {
		OF_close(of->sc_ihandle);
		of->sc_ihandle = 0;
	}

	mutex_exit(&of->sc_dk.dk_openlock);
	return 0;
}

示例#5

文件： hfs.c 项目： bradla/OpenBSD-Hammer2

off_t
hfs_seek(struct open_file *f, off_t offset, int where)
{
	switch (where) {
	case SEEK_SET:
		return OF_seek(OF_fd, offset);
	case SEEK_CUR:
	case SEEK_END:
	default:
		return -1;
	}
}

示例#6

文件： ofdisk.c 项目： ryoon/netbsd-xhci

void
ofdisk_strategy(struct buf *bp)
{
	struct ofdisk_softc *of =
		device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev));
	struct partition *p;
	u_quad_t off;
	int read;
	int (*OF_io)(int, void *, int);
	daddr_t blkno = bp->b_blkno;

	bp->b_resid = 0;
	if (bp->b_bcount == 0)
		goto done;

	OF_io = bp->b_flags & B_READ ? OF_read : 
		(int(*)(int, void*, int))OF_write;

	if (DISKPART(bp->b_dev) != RAW_PART) {
		if (bounds_check_with_label(&of->sc_dk, bp, 0) <= 0) {
			bp->b_resid = bp->b_bcount;
			goto done;
		}
		p = &of->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)];
		blkno = bp->b_blkno + p->p_offset;
	}

	disk_busy(&of->sc_dk);

	off = (u_quad_t)blkno * DEV_BSIZE;
	read = -1;
	do {
		if (OF_seek(of->sc_ihandle, off) < 0)
			break;
		read = OF_io(of->sc_ihandle, bp->b_data, bp->b_bcount);
	} while (read == -2);

	if (read < 0) {
		bp->b_error = EIO;
		bp->b_resid = bp->b_bcount;
	} else
		bp->b_resid = bp->b_bcount - read;

	disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid,
	    (bp->b_flags & B_READ));

done:
	biodone(bp);
}

示例#7

文件： ofw_disk.c 项目： UnitedMarsupials/kame

static int
ofwd_strategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf,
    size_t *rsize)
{
	struct ofw_devdesc *dp = (struct ofw_devdesc *)devdata;
	unsigned long pos;
	int n;
	int i, j;

	pos = dblk * 512;
	do {
		if (OF_seek(dp->d_handle, pos) < 0)
			return EIO;
		n = OF_read(dp->d_handle, buf, size);
		if (n < 0 && n != -2)
			return EIO;
	} while (n == -2);
	*rsize = size;
	return 0;
}

示例#8

文件： ofdev.c 项目： DavidAlphaFox/openbsd-kernel

int
strategy(void *devdata, int rw, daddr32_t blk, size_t size, void *buf,
    size_t *rsize)
{
	struct of_dev *dev = devdata;
	u_quad_t pos;
	int n;
	
	if (rw != F_READ)
		return EPERM;
#ifdef SOFTRAID
	/* Intercept strategy for softraid volumes. */
	if (dev->type == OFDEV_SOFTRAID)
		return sr_strategy(bootdev_dip->sr_vol, rw,
		    blk, size, buf, rsize);
#endif
	if (dev->type != OFDEV_DISK)
		panic("strategy");
	
	DNPRINTF(BOOT_D_OFDEV, "strategy: block %lx, partition offset %lx, "
	    "blksz %lx\n", (long)blk, (long)dev->partoff, (long)dev->bsize);
	DNPRINTF(BOOT_D_OFDEV, "strategy: seek position should be: %lx\n", 
	    (long)((blk + dev->partoff) * dev->bsize));
	pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
	
	for (;;) {
		DNPRINTF(BOOT_D_OFDEV, "strategy: seeking to %lx\n", (long)pos);
		if (OF_seek(dev->handle, pos) < 0)
			break;
		DNPRINTF(BOOT_D_OFDEV, "strategy: reading %lx at %p\n",
		    (long)size, buf);
		n = OF_read(dev->handle, buf, size);
		if (n == -2)
			continue;
		if (n < 0)
			break;
		*rsize = n;
		return 0;
	}
	return EIO;
}