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