diff options
Diffstat (limited to 'linux/dev/drivers/scsi/sd_ioctl.c')
-rw-r--r-- | linux/dev/drivers/scsi/sd_ioctl.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/linux/dev/drivers/scsi/sd_ioctl.c b/linux/dev/drivers/scsi/sd_ioctl.c new file mode 100644 index 0000000..4c58f04 --- /dev/null +++ b/linux/dev/drivers/scsi/sd_ioctl.c @@ -0,0 +1,128 @@ +/* + * drivers/scsi/sd_ioctl.c + * + * ioctl handling for SCSI disks + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/hdreg.h> +#include <linux/errno.h> + +#include <asm/segment.h> + +#include <linux/blk.h> +#include "scsi.h" +#include <scsi/scsi_ioctl.h> +#include "hosts.h" +#include "sd.h" +#include <scsi/scsicam.h> /* must follow "hosts.h" */ + +int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) +{ + kdev_t 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_GETGEO: /* Return BIOS disk parameters */ + if (!loc) return -EINVAL; +#ifndef MACH + error = verify_area(VERIFY_WRITE, loc, sizeof(*loc)); + if (error) + return error; +#endif + host = rscsi_disks[MINOR(dev) >> 4].device->host; + +/* default to most commonly used values */ + + diskinfo[0] = 0x40; + diskinfo[1] = 0x20; + diskinfo[2] = rscsi_disks[MINOR(dev) >> 4].capacity >> 11; + +/* override with calculated, extended default, or driver values */ + + if(host->hostt->bios_param != NULL) + host->hostt->bios_param(&rscsi_disks[MINOR(dev) >> 4], + dev, + &diskinfo[0]); + else scsicam_bios_param(&rscsi_disks[MINOR(dev) >> 4], + dev, &diskinfo[0]); + +#ifdef MACH + loc->heads = diskinfo[0]; + loc->sectors = diskinfo[1]; + loc->cylinders = diskinfo[2]; + loc->start = sd[MINOR(inode->i_rdev)].start_sect; +#else + put_user(diskinfo[0], &loc->heads); + put_user(diskinfo[1], &loc->sectors); + put_user(diskinfo[2], &loc->cylinders); + put_user(sd[MINOR(inode->i_rdev)].start_sect, &loc->start); +#endif + 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_user(sd[MINOR(inode->i_rdev)].nr_sects, + (long *) arg); + return 0; + + case BLKRASET: + if (!suser()) + return -EACCES; + if(!(inode->i_rdev)) return -EINVAL; + if(arg > 0xff) return -EINVAL; + read_ahead[MAJOR(inode->i_rdev)] = arg; + return 0; + + case BLKRAGET: + if (!arg) + return -EINVAL; + error = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int)); + if (error) + return error; + put_user(read_ahead[MAJOR(inode->i_rdev)], (int *) 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); + + RO_IOCTLS(dev, arg); + + default: + return scsi_ioctl(rscsi_disks[MINOR(dev) >> 4].device , cmd, (void *) arg); + } +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-indent-level: 4 + * c-brace-imaginary-offset: 0 + * c-brace-offset: -4 + * c-argdecl-indent: 4 + * c-label-offset: -4 + * c-continued-statement-offset: 4 + * c-continued-brace-offset: 0 + * indent-tabs-mode: nil + * tab-width: 8 + * End: + */ |