69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/hdreg.h>
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#include <linux/errno.h>
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#include <asm/segment.h>
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#include "../block/blk.h"
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#include "scsi.h"
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#include "scsi_ioctl.h"
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#include "hosts.h"
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#include "sd.h"
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extern int revalidate_scsidisk(int, int);
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int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
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{
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int dev = inode->i_rdev;
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int error;
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struct Scsi_Host * host;
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int diskinfo[4];
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struct hd_geometry *loc = (struct hd_geometry *) arg;
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switch (cmd) {
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case HDIO_REQ: /* Return BIOS disk parameters */
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if (!loc) return -EINVAL;
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error = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
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if (error)
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return error;
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host = rscsi_disks[MINOR(dev) >> 4].device->host;
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diskinfo[0] = 0;
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diskinfo[1] = 0;
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diskinfo[2] = 0;
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if(host->hostt->bios_param != NULL)
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host->hostt->bios_param(rscsi_disks[MINOR(dev) >> 4].capacity,
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dev,
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&diskinfo[0]);
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put_fs_byte(diskinfo[0],
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(char *) &loc->heads);
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put_fs_byte(diskinfo[1],
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(char *) &loc->sectors);
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put_fs_word(diskinfo[2],
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(short *) &loc->cylinders);
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put_fs_long(sd[MINOR(inode->i_rdev)].start_sect,
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(long *) &loc->start);
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return 0;
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case BLKGETSIZE: /* Return device size */
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if (!arg) return -EINVAL;
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error = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
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if (error)
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return error;
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put_fs_long(sd[MINOR(inode->i_rdev)].nr_sects,
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(long *) arg);
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return 0;
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case BLKFLSBUF:
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if(!suser()) return -EACCES;
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if(!inode->i_rdev) return -EINVAL;
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fsync_dev(inode->i_rdev);
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invalidate_buffers(inode->i_rdev);
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return 0;
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case BLKRRPART: /* Re-read partition tables */
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return revalidate_scsidisk(dev, 1);
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default:
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return scsi_ioctl(rscsi_disks[MINOR(dev) >> 4].device , cmd, (void *) arg);
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}
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}
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